1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.941 2008/02/03 05:08:05 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Date;
35: # use Date::Parse;
36: use vars qw(%perlvar %spareid %pr %prp $memcache %packagetab $tmpdir
37: $_64bit %env);
38:
39: my (%badServerCache, $memcache, %courselogs, %accesshash, %domainrolehash,
40: %userrolehash, $processmarker, $dumpcount, %coursedombuf,
41: %coursenumbuf, %coursehombuf, %coursedescrbuf, %courseinstcodebuf,
42: %courseownerbuf, %coursetypebuf);
43:
44: use IO::Socket;
45: use GDBM_File;
46: use HTML::LCParser;
47: use Fcntl qw(:flock);
48: use Storable qw(thaw nfreeze);
49: use Time::HiRes qw( gettimeofday tv_interval );
50: use Cache::Memcached;
51: use Digest::MD5;
52: use Math::Random;
53: use LONCAPA qw(:DEFAULT :match);
54: use LONCAPA::Configuration;
55:
56: my $readit;
57: my $max_connection_retries = 10; # Or some such value.
58:
59: require Exporter;
60:
61: our @ISA = qw (Exporter);
62: our @EXPORT = qw(%env);
63:
64: =pod
65:
66: =head1 Package Variables
67:
68: These are largely undocumented, so if you decipher one please note it here.
69:
70: =over 4
71:
72: =item $processmarker
73:
74: Contains the time this process was started and this servers host id.
75:
76: =item $dumpcount
77:
78: Counts the number of times a message log flush has been attempted (regardless
79: of success) by this process. Used as part of the filename when messages are
80: delayed.
81:
82: =back
83:
84: =cut
85:
86:
87: # --------------------------------------------------------------------- Logging
88: {
89: my $logid;
90: sub instructor_log {
91: my ($hash_name,$storehash,$delflag,$uname,$udom)=@_;
92: $logid++;
93: my $id=time().'00000'.$$.'00000'.$logid;
94: return &Apache::lonnet::put('nohist_'.$hash_name,
95: { $id => {
96: 'exe_uname' => $env{'user.name'},
97: 'exe_udom' => $env{'user.domain'},
98: 'exe_time' => time(),
99: 'exe_ip' => $ENV{'REMOTE_ADDR'},
100: 'delflag' => $delflag,
101: 'logentry' => $storehash,
102: 'uname' => $uname,
103: 'udom' => $udom,
104: }
105: },
106: $env{'course.'.$env{'request.course.id'}.'.domain'},
107: $env{'course.'.$env{'request.course.id'}.'.num'}
108: );
109: }
110: }
111:
112: sub logtouch {
113: my $execdir=$perlvar{'lonDaemons'};
114: unless (-e "$execdir/logs/lonnet.log") {
115: open(my $fh,">>$execdir/logs/lonnet.log");
116: close $fh;
117: }
118: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
119: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
120: }
121:
122: sub logthis {
123: my $message=shift;
124: my $execdir=$perlvar{'lonDaemons'};
125: my $now=time;
126: my $local=localtime($now);
127: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
128: print $fh "$local ($$): $message\n";
129: close($fh);
130: }
131: return 1;
132: }
133:
134: sub logperm {
135: my $message=shift;
136: my $execdir=$perlvar{'lonDaemons'};
137: my $now=time;
138: my $local=localtime($now);
139: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
140: print $fh "$now:$message:$local\n";
141: close($fh);
142: }
143: return 1;
144: }
145:
146: sub create_connection {
147: my ($hostname,$lonid) = @_;
148: my $client=IO::Socket::UNIX->new(Peer => $perlvar{'lonSockCreate'},
149: Type => SOCK_STREAM,
150: Timeout => 10);
151: return 0 if (!$client);
152: print $client (join(':',$hostname,$lonid,&machine_ids($hostname))."\n");
153: my $result = <$client>;
154: chomp($result);
155: return 1 if ($result eq 'done');
156: return 0;
157: }
158:
159:
160: # -------------------------------------------------- Non-critical communication
161: sub subreply {
162: my ($cmd,$server)=@_;
163: my $peerfile="$perlvar{'lonSockDir'}/".&hostname($server);
164: #
165: # With loncnew process trimming, there's a timing hole between lonc server
166: # process exit and the master server picking up the listen on the AF_UNIX
167: # socket. In that time interval, a lock file will exist:
168:
169: my $lockfile=$peerfile.".lock";
170: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
171: sleep(1);
172: }
173: # At this point, either a loncnew parent is listening or an old lonc
174: # or loncnew child is listening so we can connect or everything's dead.
175: #
176: # We'll give the connection a few tries before abandoning it. If
177: # connection is not possible, we'll con_lost back to the client.
178: #
179: my $client;
180: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
181: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
182: Type => SOCK_STREAM,
183: Timeout => 10);
184: if ($client) {
185: last; # Connected!
186: } else {
187: &create_connection(&hostname($server),$server);
188: }
189: sleep(1); # Try again later if failed connection.
190: }
191: my $answer;
192: if ($client) {
193: print $client "sethost:$server:$cmd\n";
194: $answer=<$client>;
195: if (!$answer) { $answer="con_lost"; }
196: chomp($answer);
197: } else {
198: $answer = 'con_lost'; # Failed connection.
199: }
200: return $answer;
201: }
202:
203: sub reply {
204: my ($cmd,$server)=@_;
205: unless (defined(&hostname($server))) { return 'no_such_host'; }
206: my $answer=subreply($cmd,$server);
207: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
208: &logthis("<font color=\"blue\">WARNING:".
209: " $cmd to $server returned $answer</font>");
210: }
211: return $answer;
212: }
213:
214: # ----------------------------------------------------------- Send USR1 to lonc
215:
216: sub reconlonc {
217: my ($lonid) = @_;
218: my $hostname = &hostname($lonid);
219: if ($lonid) {
220: my $peerfile="$perlvar{'lonSockDir'}/$hostname";
221: if ($hostname && -e $peerfile) {
222: &logthis("Trying to reconnect lonc for $lonid ($hostname)");
223: my $client=IO::Socket::UNIX->new(Peer => $peerfile,
224: Type => SOCK_STREAM,
225: Timeout => 10);
226: if ($client) {
227: print $client ("reset_retries\n");
228: my $answer=<$client>;
229: #reset just this one.
230: }
231: }
232: return;
233: }
234:
235: &logthis("Trying to reconnect lonc");
236: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
237: if (open(my $fh,"<$loncfile")) {
238: my $loncpid=<$fh>;
239: chomp($loncpid);
240: if (kill 0 => $loncpid) {
241: &logthis("lonc at pid $loncpid responding, sending USR1");
242: kill USR1 => $loncpid;
243: sleep 1;
244: } else {
245: &logthis(
246: "<font color=\"blue\">WARNING:".
247: " lonc at pid $loncpid not responding, giving up</font>");
248: }
249: } else {
250: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
251: }
252: }
253:
254: # ------------------------------------------------------ Critical communication
255:
256: sub critical {
257: my ($cmd,$server)=@_;
258: unless (&hostname($server)) {
259: &logthis("<font color=\"blue\">WARNING:".
260: " Critical message to unknown server ($server)</font>");
261: return 'no_such_host';
262: }
263: my $answer=reply($cmd,$server);
264: if ($answer eq 'con_lost') {
265: &reconlonc("$perlvar{'lonSockDir'}/$server");
266: my $answer=reply($cmd,$server);
267: if ($answer eq 'con_lost') {
268: my $now=time;
269: my $middlename=$cmd;
270: $middlename=substr($middlename,0,16);
271: $middlename=~s/\W//g;
272: my $dfilename=
273: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
274: $dumpcount++;
275: {
276: my $dfh;
277: if (open($dfh,">$dfilename")) {
278: print $dfh "$cmd\n";
279: close($dfh);
280: }
281: }
282: sleep 2;
283: my $wcmd='';
284: {
285: my $dfh;
286: if (open($dfh,"<$dfilename")) {
287: $wcmd=<$dfh>;
288: close($dfh);
289: }
290: }
291: chomp($wcmd);
292: if ($wcmd eq $cmd) {
293: &logthis("<font color=\"blue\">WARNING: ".
294: "Connection buffer $dfilename: $cmd</font>");
295: &logperm("D:$server:$cmd");
296: return 'con_delayed';
297: } else {
298: &logthis("<font color=\"red\">CRITICAL:"
299: ." Critical connection failed: $server $cmd</font>");
300: &logperm("F:$server:$cmd");
301: return 'con_failed';
302: }
303: }
304: }
305: return $answer;
306: }
307:
308: # ------------------------------------------- check if return value is an error
309:
310: sub error {
311: my ($result) = @_;
312: if ($result =~ /^(con_lost|no_such_host|error: (\d+) (.*))/) {
313: if ($2 == 2) { return undef; }
314: return $1;
315: }
316: return undef;
317: }
318:
319: sub convert_and_load_session_env {
320: my ($lonidsdir,$handle)=@_;
321: my @profile;
322: {
323: my $opened = open(my $idf,'+<',"$lonidsdir/$handle.id");
324: if (!$opened) {
325: return 0;
326: }
327: flock($idf,LOCK_SH);
328: @profile=<$idf>;
329: close($idf);
330: }
331: my %temp_env;
332: foreach my $line (@profile) {
333: if ($line !~ m/=/) {
334: return 0;
335: }
336: chomp($line);
337: my ($envname,$envvalue)=split(/=/,$line,2);
338: $temp_env{&unescape($envname)} = &unescape($envvalue);
339: }
340: unlink("$lonidsdir/$handle.id");
341: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",&GDBM_WRCREAT(),
342: 0640)) {
343: %disk_env = %temp_env;
344: @env{keys(%temp_env)} = @disk_env{keys(%temp_env)};
345: untie(%disk_env);
346: }
347: return 1;
348: }
349:
350: # ------------------------------------------- Transfer profile into environment
351: my $env_loaded;
352: sub transfer_profile_to_env {
353: my ($lonidsdir,$handle,$force_transfer) = @_;
354: if (!$force_transfer && $env_loaded) { return; }
355:
356: if (!defined($lonidsdir)) {
357: $lonidsdir = $perlvar{'lonIDsDir'};
358: }
359: if (!defined($handle)) {
360: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
361: }
362:
363: my $convert;
364: {
365: my $opened = open(my $idf,'+<',"$lonidsdir/$handle.id");
366: if (!$opened) {
367: return;
368: }
369: flock($idf,LOCK_SH);
370: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",
371: &GDBM_READER(),0640)) {
372: @env{keys(%disk_env)} = @disk_env{keys(%disk_env)};
373: untie(%disk_env);
374: } else {
375: $convert = 1;
376: }
377: }
378: if ($convert) {
379: if (!&convert_and_load_session_env($lonidsdir,$handle)) {
380: &logthis("Failed to load session, or convert session.");
381: }
382: }
383:
384: my %remove;
385: while ( my $envname = each(%env) ) {
386: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
387: if ($time < time-300) {
388: $remove{$key}++;
389: }
390: }
391: }
392:
393: $env{'user.environment'} = "$lonidsdir/$handle.id";
394: $env_loaded=1;
395: foreach my $expired_key (keys(%remove)) {
396: &delenv($expired_key);
397: }
398: }
399:
400: # ---------------------------------------------------- Check for valid session
401: sub check_for_valid_session {
402: my ($r) = @_;
403: my %cookies=CGI::Cookie->parse($r->header_in('Cookie'));
404: my $lonid=$cookies{'lonID'};
405: return undef if (!$lonid);
406:
407: my $handle=&LONCAPA::clean_handle($lonid->value);
408: my $lonidsdir=$r->dir_config('lonIDsDir');
409: return undef if (!-e "$lonidsdir/$handle.id");
410:
411: my $opened = open(my $idf,'+<',"$lonidsdir/$handle.id");
412: return undef if (!$opened);
413:
414: flock($idf,LOCK_SH);
415: my %disk_env;
416: if (!tie(%disk_env,'GDBM_File',"$lonidsdir/$handle.id",
417: &GDBM_READER(),0640)) {
418: return undef;
419: }
420:
421: if (!defined($disk_env{'user.name'})
422: || !defined($disk_env{'user.domain'})) {
423: return undef;
424: }
425: return $handle;
426: }
427:
428: sub timed_flock {
429: my ($file,$lock_type) = @_;
430: my $failed=0;
431: eval {
432: local $SIG{__DIE__}='DEFAULT';
433: local $SIG{ALRM}=sub {
434: $failed=1;
435: die("failed lock");
436: };
437: alarm(13);
438: flock($file,$lock_type);
439: alarm(0);
440: };
441: if ($failed) {
442: return undef;
443: } else {
444: return 1;
445: }
446: }
447:
448: # ---------------------------------------------------------- Append Environment
449:
450: sub appenv {
451: my %newenv=@_;
452: foreach my $key (keys(%newenv)) {
453: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
454: &logthis("<font color=\"blue\">WARNING: ".
455: "Attempt to modify environment ".$key." to ".$newenv{$key}
456: .'</font>');
457: delete($newenv{$key});
458: } else {
459: $env{$key}=$newenv{$key};
460: }
461: }
462: my $opened = open(my $env_file,'+<',$env{'user.environment'});
463: if ($opened
464: && &timed_flock($env_file,LOCK_EX)
465: &&
466: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
467: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
468: while (my ($key,$value) = each(%newenv)) {
469: $disk_env{$key} = $value;
470: }
471: untie(%disk_env);
472: }
473: return 'ok';
474: }
475: # ----------------------------------------------------- Delete from Environment
476:
477: sub delenv {
478: my $delthis=shift;
479: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
480: &logthis("<font color=\"blue\">WARNING: ".
481: "Attempt to delete from environment ".$delthis);
482: return 'error';
483: }
484: my $opened = open(my $env_file,'+<',$env{'user.environment'});
485: if ($opened
486: && &timed_flock($env_file,LOCK_EX)
487: &&
488: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
489: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
490: foreach my $key (keys(%disk_env)) {
491: if ($key=~/^$delthis/) {
492: delete($env{$key});
493: delete($disk_env{$key});
494: }
495: }
496: untie(%disk_env);
497: }
498: return 'ok';
499: }
500:
501: sub get_env_multiple {
502: my ($name) = @_;
503: my @values;
504: if (defined($env{$name})) {
505: # exists is it an array
506: if (ref($env{$name})) {
507: @values=@{ $env{$name} };
508: } else {
509: $values[0]=$env{$name};
510: }
511: }
512: return(@values);
513: }
514:
515: # ------------------------------------------ Find out current server userload
516: sub userload {
517: my $numusers=0;
518: {
519: opendir(LONIDS,$perlvar{'lonIDsDir'});
520: my $filename;
521: my $curtime=time;
522: while ($filename=readdir(LONIDS)) {
523: next if ($filename eq '.' || $filename eq '..');
524: next if ($filename =~ /publicuser_\d+\.id/);
525: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
526: if ($curtime-$mtime < 1800) { $numusers++; }
527: }
528: closedir(LONIDS);
529: }
530: my $userloadpercent=0;
531: my $maxuserload=$perlvar{'lonUserLoadLim'};
532: if ($maxuserload) {
533: $userloadpercent=100*$numusers/$maxuserload;
534: }
535: $userloadpercent=sprintf("%.2f",$userloadpercent);
536: return $userloadpercent;
537: }
538:
539: # ------------------------------------------ Fight off request when overloaded
540:
541: sub overloaderror {
542: my ($r,$checkserver)=@_;
543: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
544: my $loadavg;
545: if ($checkserver eq $perlvar{'lonHostID'}) {
546: open(my $loadfile,'/proc/loadavg');
547: $loadavg=<$loadfile>;
548: $loadavg =~ s/\s.*//g;
549: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
550: close($loadfile);
551: } else {
552: $loadavg=&reply('load',$checkserver);
553: }
554: my $overload=$loadavg-100;
555: if ($overload>0) {
556: $r->err_headers_out->{'Retry-After'}=$overload;
557: $r->log_error('Overload of '.$overload.' on '.$checkserver);
558: return 413;
559: }
560: return '';
561: }
562:
563: # ------------------------------ Find server with least workload from spare.tab
564:
565: sub spareserver {
566: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
567: my $spare_server;
568: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
569: my $lowest_load=($loadpercent > $userloadpercent) ? $loadpercent
570: : $userloadpercent;
571:
572: foreach my $try_server (@{ $spareid{'primary'} }) {
573: ($spare_server, $lowest_load) =
574: &compare_server_load($try_server, $spare_server, $lowest_load);
575: }
576:
577: my $found_server = ($spare_server ne '' && $lowest_load < 100);
578:
579: if (!$found_server) {
580: foreach my $try_server (@{ $spareid{'default'} }) {
581: ($spare_server, $lowest_load) =
582: &compare_server_load($try_server, $spare_server, $lowest_load);
583: }
584: }
585:
586: if (!$want_server_name) {
587: $spare_server="http://".&hostname($spare_server);
588: }
589: return $spare_server;
590: }
591:
592: sub compare_server_load {
593: my ($try_server, $spare_server, $lowest_load) = @_;
594:
595: my $loadans = &reply('load', $try_server);
596: my $userloadans = &reply('userload',$try_server);
597:
598: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
599: next; #didn't get a number from the server
600: }
601:
602: my $load;
603: if ($loadans =~ /\d/) {
604: if ($userloadans =~ /\d/) {
605: #both are numbers, pick the bigger one
606: $load = ($loadans > $userloadans) ? $loadans
607: : $userloadans;
608: } else {
609: $load = $loadans;
610: }
611: } else {
612: $load = $userloadans;
613: }
614:
615: if (($load =~ /\d/) && ($load < $lowest_load)) {
616: $spare_server = $try_server;
617: $lowest_load = $load;
618: }
619: return ($spare_server,$lowest_load);
620: }
621:
622: # --------------------------- ask offload servers if user already has a session
623: sub find_existing_session {
624: my ($udom,$uname) = @_;
625: foreach my $try_server (@{ $spareid{'primary'} },
626: @{ $spareid{'default'} }) {
627: return $try_server if (&has_user_session($try_server, $udom, $uname));
628: }
629: return;
630: }
631:
632: # -------------------------------- ask if server already has a session for user
633: sub has_user_session {
634: my ($lonid,$udom,$uname) = @_;
635: my $result = &reply(join(':','userhassession',
636: map {&escape($_)} ($udom,$uname)),$lonid);
637: return 1 if ($result eq 'ok');
638:
639: return 0;
640: }
641:
642: # --------------------------------------------- Try to change a user's password
643:
644: sub changepass {
645: my ($uname,$udom,$currentpass,$newpass,$server,$context)=@_;
646: $currentpass = &escape($currentpass);
647: $newpass = &escape($newpass);
648: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass:$context",
649: $server);
650: if (! $answer) {
651: &logthis("No reply on password change request to $server ".
652: "by $uname in domain $udom.");
653: } elsif ($answer =~ "^ok") {
654: &logthis("$uname in $udom successfully changed their password ".
655: "on $server.");
656: } elsif ($answer =~ "^pwchange_failure") {
657: &logthis("$uname in $udom was unable to change their password ".
658: "on $server. The action was blocked by either lcpasswd ".
659: "or pwchange");
660: } elsif ($answer =~ "^non_authorized") {
661: &logthis("$uname in $udom did not get their password correct when ".
662: "attempting to change it on $server.");
663: } elsif ($answer =~ "^auth_mode_error") {
664: &logthis("$uname in $udom attempted to change their password despite ".
665: "not being locally or internally authenticated on $server.");
666: } elsif ($answer =~ "^unknown_user") {
667: &logthis("$uname in $udom attempted to change their password ".
668: "on $server but were unable to because $server is not ".
669: "their home server.");
670: } elsif ($answer =~ "^refused") {
671: &logthis("$server refused to change $uname in $udom password because ".
672: "it was sent an unencrypted request to change the password.");
673: }
674: return $answer;
675: }
676:
677: # ----------------------- Try to determine user's current authentication scheme
678:
679: sub queryauthenticate {
680: my ($uname,$udom)=@_;
681: my $uhome=&homeserver($uname,$udom);
682: if (!$uhome) {
683: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
684: return 'no_host';
685: }
686: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
687: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
688: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
689: }
690: return $answer;
691: }
692:
693: # --------- Try to authenticate user from domain's lib servers (first this one)
694:
695: sub authenticate {
696: my ($uname,$upass,$udom)=@_;
697: $upass=&escape($upass);
698: $uname= &LONCAPA::clean_username($uname);
699: my $uhome=&homeserver($uname,$udom,1);
700: if ((!$uhome) || ($uhome eq 'no_host')) {
701: # Maybe the machine was offline and only re-appeared again recently?
702: &reconlonc();
703: # One more
704: my $uhome=&homeserver($uname,$udom,1);
705: if ((!$uhome) || ($uhome eq 'no_host')) {
706: &logthis("User $uname at $udom is unknown in authenticate");
707: }
708: return 'no_host';
709: }
710: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
711: if ($answer eq 'authorized') {
712: &logthis("User $uname at $udom authorized by $uhome");
713: return $uhome;
714: }
715: if ($answer eq 'non_authorized') {
716: &logthis("User $uname at $udom rejected by $uhome");
717: return 'no_host';
718: }
719: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
720: return 'no_host';
721: }
722:
723: # ---------------------- Find the homebase for a user from domain's lib servers
724:
725: my %homecache;
726: sub homeserver {
727: my ($uname,$udom,$ignoreBadCache)=@_;
728: my $index="$uname:$udom";
729:
730: if (exists($homecache{$index})) { return $homecache{$index}; }
731:
732: my %servers = &get_servers($udom,'library');
733: foreach my $tryserver (keys(%servers)) {
734: next if ($ignoreBadCache ne 'true' &&
735: exists($badServerCache{$tryserver}));
736:
737: my $answer=reply("home:$udom:$uname",$tryserver);
738: if ($answer eq 'found') {
739: delete($badServerCache{$tryserver});
740: return $homecache{$index}=$tryserver;
741: } elsif ($answer eq 'no_host') {
742: $badServerCache{$tryserver}=1;
743: }
744: }
745: return 'no_host';
746: }
747:
748: # ------------------------------------- Find the usernames behind a list of IDs
749:
750: sub idget {
751: my ($udom,@ids)=@_;
752: my %returnhash=();
753:
754: my %servers = &get_servers($udom,'library');
755: foreach my $tryserver (keys(%servers)) {
756: my $idlist=join('&',@ids);
757: $idlist=~tr/A-Z/a-z/;
758: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
759: my @answer=();
760: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
761: @answer=split(/\&/,$reply);
762: } ;
763: my $i;
764: for ($i=0;$i<=$#ids;$i++) {
765: if ($answer[$i]) {
766: $returnhash{$ids[$i]}=$answer[$i];
767: }
768: }
769: }
770: return %returnhash;
771: }
772:
773: # ------------------------------------- Find the IDs behind a list of usernames
774:
775: sub idrget {
776: my ($udom,@unames)=@_;
777: my %returnhash=();
778: foreach my $uname (@unames) {
779: $returnhash{$uname}=(&userenvironment($udom,$uname,'id'))[1];
780: }
781: return %returnhash;
782: }
783:
784: # ------------------------------- Store away a list of names and associated IDs
785:
786: sub idput {
787: my ($udom,%ids)=@_;
788: my %servers=();
789: foreach my $uname (keys(%ids)) {
790: &cput('environment',{'id'=>$ids{$uname}},$udom,$uname);
791: my $uhom=&homeserver($uname,$udom);
792: if ($uhom ne 'no_host') {
793: my $id=&escape($ids{$uname});
794: $id=~tr/A-Z/a-z/;
795: my $esc_unam=&escape($uname);
796: if ($servers{$uhom}) {
797: $servers{$uhom}.='&'.$id.'='.$esc_unam;
798: } else {
799: $servers{$uhom}=$id.'='.$esc_unam;
800: }
801: }
802: }
803: foreach my $server (keys(%servers)) {
804: &critical('idput:'.$udom.':'.$servers{$server},$server);
805: }
806: }
807:
808: # ------------------------------------------- get items from domain db files
809:
810: sub get_dom {
811: my ($namespace,$storearr,$udom,$uhome)=@_;
812: my $items='';
813: foreach my $item (@$storearr) {
814: $items.=&escape($item).'&';
815: }
816: $items=~s/\&$//;
817: if (!$udom) {
818: $udom=$env{'user.domain'};
819: if (defined(&domain($udom,'primary'))) {
820: $uhome=&domain($udom,'primary');
821: } else {
822: undef($uhome);
823: }
824: } else {
825: if (!$uhome) {
826: if (defined(&domain($udom,'primary'))) {
827: $uhome=&domain($udom,'primary');
828: }
829: }
830: }
831: if ($udom && $uhome && ($uhome ne 'no_host')) {
832: my $rep=&reply("getdom:$udom:$namespace:$items",$uhome);
833: my %returnhash;
834: if ($rep eq '' || $rep =~ /^error: 2 /) {
835: return %returnhash;
836: }
837: my @pairs=split(/\&/,$rep);
838: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
839: return @pairs;
840: }
841: my $i=0;
842: foreach my $item (@$storearr) {
843: $returnhash{$item}=&thaw_unescape($pairs[$i]);
844: $i++;
845: }
846: return %returnhash;
847: } else {
848: &logthis("get_dom failed - no homeserver and/or domain ($udom) ($uhome)");
849: }
850: }
851:
852: # -------------------------------------------- put items in domain db files
853:
854: sub put_dom {
855: my ($namespace,$storehash,$udom,$uhome)=@_;
856: if (!$udom) {
857: $udom=$env{'user.domain'};
858: if (defined(&domain($udom,'primary'))) {
859: $uhome=&domain($udom,'primary');
860: } else {
861: undef($uhome);
862: }
863: } else {
864: if (!$uhome) {
865: if (defined(&domain($udom,'primary'))) {
866: $uhome=&domain($udom,'primary');
867: }
868: }
869: }
870: if ($udom && $uhome && ($uhome ne 'no_host')) {
871: my $items='';
872: foreach my $item (keys(%$storehash)) {
873: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
874: }
875: $items=~s/\&$//;
876: return &reply("putdom:$udom:$namespace:$items",$uhome);
877: } else {
878: &logthis("put_dom failed - no homeserver and/or domain");
879: }
880: }
881:
882: sub retrieve_inst_usertypes {
883: my ($udom) = @_;
884: my (%returnhash,@order);
885: if (defined(&domain($udom,'primary'))) {
886: my $uhome=&domain($udom,'primary');
887: my $rep=&reply("inst_usertypes:$udom",$uhome);
888: my ($hashitems,$orderitems) = split(/:/,$rep);
889: my @pairs=split(/\&/,$hashitems);
890: foreach my $item (@pairs) {
891: my ($key,$value)=split(/=/,$item,2);
892: $key = &unescape($key);
893: next if ($key =~ /^error: 2 /);
894: $returnhash{$key}=&thaw_unescape($value);
895: }
896: my @esc_order = split(/\&/,$orderitems);
897: foreach my $item (@esc_order) {
898: push(@order,&unescape($item));
899: }
900: } else {
901: &logthis("get_dom failed - no primary domain server for $udom");
902: }
903: return (\%returnhash,\@order);
904: }
905:
906: sub is_domainimage {
907: my ($url) = @_;
908: if ($url=~m-^/+res/+($match_domain)/+\1\-domainconfig/+(img|logo|domlogo)/+-) {
909: if (&domain($1) ne '') {
910: return '1';
911: }
912: }
913: return;
914: }
915:
916: sub inst_directory_query {
917: my ($srch) = @_;
918: my $udom = $srch->{'srchdomain'};
919: my %results;
920: my $homeserver = &domain($udom,'primary');
921: my $outcome;
922: if ($homeserver ne '') {
923: my $queryid=&reply("querysend:instdirsearch:".
924: &escape($srch->{'srchby'}).':'.
925: &escape($srch->{'srchterm'}).':'.
926: &escape($srch->{'srchtype'}),$homeserver);
927: my $host=&hostname($homeserver);
928: if ($queryid !~/^\Q$host\E\_/) {
929: &logthis('instituional directory search invalid queryid: '.$queryid.' for host: '.$homeserver.'in domain '.$udom);
930: return;
931: }
932: my $response = &get_query_reply($queryid);
933: my $maxtries = 5;
934: my $tries = 1;
935: while (($response=~/^timeout/) && ($tries < $maxtries)) {
936: $response = &get_query_reply($queryid);
937: $tries ++;
938: }
939:
940: if (!&error($response) && $response ne 'refused') {
941: if ($response eq 'unavailable') {
942: $outcome = $response;
943: } else {
944: $outcome = 'ok';
945: my @matches = split(/\n/,$response);
946: foreach my $match (@matches) {
947: my ($key,$value) = split(/=/,$match);
948: $results{&unescape($key).':'.$udom} = &thaw_unescape($value);
949: }
950: }
951: }
952: }
953: return ($outcome,%results);
954: }
955:
956: sub usersearch {
957: my ($srch) = @_;
958: my $dom = $srch->{'srchdomain'};
959: my %results;
960: my %libserv = &all_library();
961: my $query = 'usersearch';
962: foreach my $tryserver (keys(%libserv)) {
963: if (&host_domain($tryserver) eq $dom) {
964: my $host=&hostname($tryserver);
965: my $queryid=
966: &reply("querysend:".&escape($query).':'.
967: &escape($srch->{'srchby'}).':'.
968: &escape($srch->{'srchtype'}).':'.
969: &escape($srch->{'srchterm'}),$tryserver);
970: if ($queryid !~/^\Q$host\E\_/) {
971: &logthis('usersearch: invalid queryid: '.$queryid.' for host: '.$host.'in domain '.$dom.' and server: '.$tryserver);
972: next;
973: }
974: my $reply = &get_query_reply($queryid);
975: my $maxtries = 1;
976: my $tries = 1;
977: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
978: $reply = &get_query_reply($queryid);
979: $tries ++;
980: }
981: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
982: &logthis('usersrch error: '.$reply.' for '.$dom.' - searching for : '.$srch->{'srchterm'}.' by '.$srch->{'srchby'}.' ('.$srch->{'srchtype'}.') - maxtries: '.$maxtries.' tries: '.$tries);
983: } else {
984: my @matches;
985: if ($reply =~ /\n/) {
986: @matches = split(/\n/,$reply);
987: } else {
988: @matches = split(/\&/,$reply);
989: }
990: foreach my $match (@matches) {
991: my ($uname,$udom,%userhash);
992: foreach my $entry (split(/:/,$match)) {
993: my ($key,$value) =
994: map {&unescape($_);} split(/=/,$entry);
995: $userhash{$key} = $value;
996: if ($key eq 'username') {
997: $uname = $value;
998: } elsif ($key eq 'domain') {
999: $udom = $value;
1000: }
1001: }
1002: $results{$uname.':'.$udom} = \%userhash;
1003: }
1004: }
1005: }
1006: }
1007: return %results;
1008: }
1009:
1010: sub get_instuser {
1011: my ($udom,$uname,$id) = @_;
1012: my $homeserver = &domain($udom,'primary');
1013: my ($outcome,%results);
1014: if ($homeserver ne '') {
1015: my $queryid=&reply("querysend:getinstuser:".&escape($uname).':'.
1016: &escape($id).':'.&escape($udom),$homeserver);
1017: my $host=&hostname($homeserver);
1018: if ($queryid !~/^\Q$host\E\_/) {
1019: &logthis('get_instuser invalid queryid: '.$queryid.' for host: '.$homeserver.'in domain '.$udom);
1020: return;
1021: }
1022: my $response = &get_query_reply($queryid);
1023: my $maxtries = 5;
1024: my $tries = 1;
1025: while (($response=~/^timeout/) && ($tries < $maxtries)) {
1026: $response = &get_query_reply($queryid);
1027: $tries ++;
1028: }
1029: if (!&error($response) && $response ne 'refused') {
1030: if ($response eq 'unavailable') {
1031: $outcome = $response;
1032: } else {
1033: $outcome = 'ok';
1034: my @matches = split(/\n/,$response);
1035: foreach my $match (@matches) {
1036: my ($key,$value) = split(/=/,$match);
1037: $results{&unescape($key)} = &thaw_unescape($value);
1038: }
1039: }
1040: }
1041: }
1042: my %userinfo;
1043: if (ref($results{$uname}) eq 'HASH') {
1044: %userinfo = %{$results{$uname}};
1045: }
1046: return ($outcome,%userinfo);
1047: }
1048:
1049: sub inst_rulecheck {
1050: my ($udom,$uname,$id,$item,$rules) = @_;
1051: my %returnhash;
1052: if ($udom ne '') {
1053: if (ref($rules) eq 'ARRAY') {
1054: @{$rules} = map {&escape($_);} (@{$rules});
1055: my $rulestr = join(':',@{$rules});
1056: my $homeserver=&domain($udom,'primary');
1057: if (($homeserver ne '') && ($homeserver ne 'no_host')) {
1058: my $response;
1059: if ($item eq 'username') {
1060: $response=&unescape(&reply('instrulecheck:'.&escape($udom).
1061: ':'.&escape($uname).':'.$rulestr,
1062: $homeserver));
1063: } elsif ($item eq 'id') {
1064: $response=&unescape(&reply('instidrulecheck:'.&escape($udom).
1065: ':'.&escape($id).':'.$rulestr,
1066: $homeserver));
1067: }
1068: if ($response ne 'refused') {
1069: my @pairs=split(/\&/,$response);
1070: foreach my $item (@pairs) {
1071: my ($key,$value)=split(/=/,$item,2);
1072: $key = &unescape($key);
1073: next if ($key =~ /^error: 2 /);
1074: $returnhash{$key}=&thaw_unescape($value);
1075: }
1076: }
1077: }
1078: }
1079: }
1080: return %returnhash;
1081: }
1082:
1083: sub inst_userrules {
1084: my ($udom,$check) = @_;
1085: my (%ruleshash,@ruleorder);
1086: if ($udom ne '') {
1087: my $homeserver=&domain($udom,'primary');
1088: if (($homeserver ne '') && ($homeserver ne 'no_host')) {
1089: my $response;
1090: if ($check eq 'id') {
1091: $response=&reply('instidrules:'.&escape($udom),
1092: $homeserver);
1093: } else {
1094: $response=&reply('instuserrules:'.&escape($udom),
1095: $homeserver);
1096: }
1097: if (($response ne 'refused') && ($response ne 'error') &&
1098: ($response ne 'unknown_cmd') &&
1099: ($response ne 'no_such_host')) {
1100: my ($hashitems,$orderitems) = split(/:/,$response);
1101: my @pairs=split(/\&/,$hashitems);
1102: foreach my $item (@pairs) {
1103: my ($key,$value)=split(/=/,$item,2);
1104: $key = &unescape($key);
1105: next if ($key =~ /^error: 2 /);
1106: $ruleshash{$key}=&thaw_unescape($value);
1107: }
1108: my @esc_order = split(/\&/,$orderitems);
1109: foreach my $item (@esc_order) {
1110: push(@ruleorder,&unescape($item));
1111: }
1112: }
1113: }
1114: }
1115: return (\%ruleshash,\@ruleorder);
1116: }
1117:
1118: # --------------------------------------------------- Assign a key to a student
1119:
1120: sub assign_access_key {
1121: #
1122: # a valid key looks like uname:udom#comments
1123: # comments are being appended
1124: #
1125: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
1126: $kdom=
1127: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
1128: $knum=
1129: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
1130: $cdom=
1131: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1132: $cnum=
1133: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1134: $udom=$env{'user.name'} unless (defined($udom));
1135: $uname=$env{'user.domain'} unless (defined($uname));
1136: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
1137: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
1138: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
1139: # assigned to this person
1140: # - this should not happen,
1141: # unless something went wrong
1142: # the first time around
1143: # ready to assign
1144: $logentry=$1.'; '.$logentry;
1145: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
1146: $kdom,$knum) eq 'ok') {
1147: # key now belongs to user
1148: my $envkey='key.'.$cdom.'_'.$cnum;
1149: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
1150: &appenv('environment.'.$envkey => $ckey);
1151: return 'ok';
1152: } else {
1153: return
1154: 'error: Count not permanently assign key, will need to be re-entered later.';
1155: }
1156: } else {
1157: return 'error: Could not assign key, try again later.';
1158: }
1159: } elsif (!$existing{$ckey}) {
1160: # the key does not exist
1161: return 'error: The key does not exist';
1162: } else {
1163: # the key is somebody else's
1164: return 'error: The key is already in use';
1165: }
1166: }
1167:
1168: # ------------------------------------------ put an additional comment on a key
1169:
1170: sub comment_access_key {
1171: #
1172: # a valid key looks like uname:udom#comments
1173: # comments are being appended
1174: #
1175: my ($ckey,$cdom,$cnum,$logentry)=@_;
1176: $cdom=
1177: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1178: $cnum=
1179: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1180: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1181: if ($existing{$ckey}) {
1182: $existing{$ckey}.='; '.$logentry;
1183: # ready to assign
1184: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
1185: $cdom,$cnum) eq 'ok') {
1186: return 'ok';
1187: } else {
1188: return 'error: Count not store comment.';
1189: }
1190: } else {
1191: # the key does not exist
1192: return 'error: The key does not exist';
1193: }
1194: }
1195:
1196: # ------------------------------------------------------ Generate a set of keys
1197:
1198: sub generate_access_keys {
1199: my ($number,$cdom,$cnum,$logentry)=@_;
1200: $cdom=
1201: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1202: $cnum=
1203: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1204: unless (&allowed('mky',$cdom)) { return 0; }
1205: unless (($cdom) && ($cnum)) { return 0; }
1206: if ($number>10000) { return 0; }
1207: sleep(2); # make sure don't get same seed twice
1208: srand(time()^($$+($$<<15))); # from "Programming Perl"
1209: my $total=0;
1210: for (my $i=1;$i<=$number;$i++) {
1211: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
1212: sprintf("%lx",int(100000*rand)).'-'.
1213: sprintf("%lx",int(100000*rand));
1214: $newkey=~s/1/g/g; # folks mix up 1 and l
1215: $newkey=~s/0/h/g; # and also 0 and O
1216: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
1217: if ($existing{$newkey}) {
1218: $i--;
1219: } else {
1220: if (&put('accesskeys',
1221: { $newkey => '# generated '.localtime().
1222: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
1223: '; '.$logentry },
1224: $cdom,$cnum) eq 'ok') {
1225: $total++;
1226: }
1227: }
1228: }
1229: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
1230: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
1231: return $total;
1232: }
1233:
1234: # ------------------------------------------------------- Validate an accesskey
1235:
1236: sub validate_access_key {
1237: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
1238: $cdom=
1239: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1240: $cnum=
1241: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1242: $udom=$env{'user.domain'} unless (defined($udom));
1243: $uname=$env{'user.name'} unless (defined($uname));
1244: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1245: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
1246: }
1247:
1248: # ------------------------------------- Find the section of student in a course
1249: sub devalidate_getsection_cache {
1250: my ($udom,$unam,$courseid)=@_;
1251: my $hashid="$udom:$unam:$courseid";
1252: &devalidate_cache_new('getsection',$hashid);
1253: }
1254:
1255: sub courseid_to_courseurl {
1256: my ($courseid) = @_;
1257: #already url style courseid
1258: return $courseid if ($courseid =~ m{^/});
1259:
1260: if (exists($env{'course.'.$courseid.'.num'})) {
1261: my $cnum = $env{'course.'.$courseid.'.num'};
1262: my $cdom = $env{'course.'.$courseid.'.domain'};
1263: return "/$cdom/$cnum";
1264: }
1265:
1266: my %courseinfo=&Apache::lonnet::coursedescription($courseid);
1267: if (exists($courseinfo{'num'})) {
1268: return "/$courseinfo{'domain'}/$courseinfo{'num'}";
1269: }
1270:
1271: return undef;
1272: }
1273:
1274: sub getsection {
1275: my ($udom,$unam,$courseid)=@_;
1276: my $cachetime=1800;
1277:
1278: my $hashid="$udom:$unam:$courseid";
1279: my ($result,$cached)=&is_cached_new('getsection',$hashid);
1280: if (defined($cached)) { return $result; }
1281:
1282: my %Pending;
1283: my %Expired;
1284: #
1285: # Each role can either have not started yet (pending), be active,
1286: # or have expired.
1287: #
1288: # If there is an active role, we are done.
1289: #
1290: # If there is more than one role which has not started yet,
1291: # choose the one which will start sooner
1292: # If there is one role which has not started yet, return it.
1293: #
1294: # If there is more than one expired role, choose the one which ended last.
1295: # If there is a role which has expired, return it.
1296: #
1297: $courseid = &courseid_to_courseurl($courseid);
1298: my %roleshash = &dump('roles',$udom,$unam,$courseid);
1299: foreach my $key (keys(%roleshash)) {
1300: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
1301: my $section=$1;
1302: if ($key eq $courseid.'_st') { $section=''; }
1303: my ($dummy,$end,$start)=split(/\_/,&unescape($roleshash{$key}));
1304: my $now=time;
1305: if (defined($end) && $end && ($now > $end)) {
1306: $Expired{$end}=$section;
1307: next;
1308: }
1309: if (defined($start) && $start && ($now < $start)) {
1310: $Pending{$start}=$section;
1311: next;
1312: }
1313: return &do_cache_new('getsection',$hashid,$section,$cachetime);
1314: }
1315: #
1316: # Presumedly there will be few matching roles from the above
1317: # loop and the sorting time will be negligible.
1318: if (scalar(keys(%Pending))) {
1319: my ($time) = sort {$a <=> $b} keys(%Pending);
1320: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
1321: }
1322: if (scalar(keys(%Expired))) {
1323: my @sorted = sort {$a <=> $b} keys(%Expired);
1324: my $time = pop(@sorted);
1325: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
1326: }
1327: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
1328: }
1329:
1330: sub save_cache {
1331: &purge_remembered();
1332: #&Apache::loncommon::validate_page();
1333: undef(%env);
1334: undef($env_loaded);
1335: }
1336:
1337: my $to_remember=-1;
1338: my %remembered;
1339: my %accessed;
1340: my $kicks=0;
1341: my $hits=0;
1342: sub make_key {
1343: my ($name,$id) = @_;
1344: if (length($id) > 65
1345: && length(&escape($id)) > 200) {
1346: $id=length($id).':'.&Digest::MD5::md5_hex($id);
1347: }
1348: return &escape($name.':'.$id);
1349: }
1350:
1351: sub devalidate_cache_new {
1352: my ($name,$id,$debug) = @_;
1353: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
1354: $id=&make_key($name,$id);
1355: $memcache->delete($id);
1356: delete($remembered{$id});
1357: delete($accessed{$id});
1358: }
1359:
1360: sub is_cached_new {
1361: my ($name,$id,$debug) = @_;
1362: $id=&make_key($name,$id);
1363: if (exists($remembered{$id})) {
1364: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
1365: $accessed{$id}=[&gettimeofday()];
1366: $hits++;
1367: return ($remembered{$id},1);
1368: }
1369: my $value = $memcache->get($id);
1370: if (!(defined($value))) {
1371: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
1372: return (undef,undef);
1373: }
1374: if ($value eq '__undef__') {
1375: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
1376: $value=undef;
1377: }
1378: &make_room($id,$value,$debug);
1379: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
1380: return ($value,1);
1381: }
1382:
1383: sub do_cache_new {
1384: my ($name,$id,$value,$time,$debug) = @_;
1385: $id=&make_key($name,$id);
1386: my $setvalue=$value;
1387: if (!defined($setvalue)) {
1388: $setvalue='__undef__';
1389: }
1390: if (!defined($time) ) {
1391: $time=600;
1392: }
1393: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
1394: my $result = $memcache->set($id,$setvalue,$time);
1395: if (! $result) {
1396: &logthis("caching of id -> $id failed");
1397: $memcache->disconnect_all();
1398: }
1399: # need to make a copy of $value
1400: &make_room($id,$value,$debug);
1401: return $value;
1402: }
1403:
1404: sub make_room {
1405: my ($id,$value,$debug)=@_;
1406:
1407: $remembered{$id}= (ref($value)) ? &Storable::dclone($value)
1408: : $value;
1409: if ($to_remember<0) { return; }
1410: $accessed{$id}=[&gettimeofday()];
1411: if (scalar(keys(%remembered)) <= $to_remember) { return; }
1412: my $to_kick;
1413: my $max_time=0;
1414: foreach my $other (keys(%accessed)) {
1415: if (&tv_interval($accessed{$other}) > $max_time) {
1416: $to_kick=$other;
1417: $max_time=&tv_interval($accessed{$other});
1418: }
1419: }
1420: delete($remembered{$to_kick});
1421: delete($accessed{$to_kick});
1422: $kicks++;
1423: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
1424: return;
1425: }
1426:
1427: sub purge_remembered {
1428: #&logthis("Tossing ".scalar(keys(%remembered)));
1429: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
1430: undef(%remembered);
1431: undef(%accessed);
1432: }
1433: # ------------------------------------- Read an entry from a user's environment
1434:
1435: sub userenvironment {
1436: my ($udom,$unam,@what)=@_;
1437: my %returnhash=();
1438: my @answer=split(/\&/,
1439: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1440: &homeserver($unam,$udom)));
1441: my $i;
1442: for ($i=0;$i<=$#what;$i++) {
1443: $returnhash{$what[$i]}=&unescape($answer[$i]);
1444: }
1445: return %returnhash;
1446: }
1447:
1448: # ---------------------------------------------------------- Get a studentphoto
1449: sub studentphoto {
1450: my ($udom,$unam,$ext) = @_;
1451: my $home=&Apache::lonnet::homeserver($unam,$udom);
1452: if (defined($env{'request.course.id'})) {
1453: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
1454: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
1455: return(&retrievestudentphoto($udom,$unam,$ext));
1456: } else {
1457: my ($result,$perm_reqd)=
1458: &Apache::lonnet::auto_photo_permission($unam,$udom);
1459: if ($result eq 'ok') {
1460: if (!($perm_reqd eq 'yes')) {
1461: return(&retrievestudentphoto($udom,$unam,$ext));
1462: }
1463: }
1464: }
1465: }
1466: } else {
1467: my ($result,$perm_reqd) =
1468: &Apache::lonnet::auto_photo_permission($unam,$udom);
1469: if ($result eq 'ok') {
1470: if (!($perm_reqd eq 'yes')) {
1471: return(&retrievestudentphoto($udom,$unam,$ext));
1472: }
1473: }
1474: }
1475: return '/adm/lonKaputt/lonlogo_broken.gif';
1476: }
1477:
1478: sub retrievestudentphoto {
1479: my ($udom,$unam,$ext,$type) = @_;
1480: my $home=&Apache::lonnet::homeserver($unam,$udom);
1481: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1482: if ($ret eq 'ok') {
1483: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1484: if ($type eq 'thumbnail') {
1485: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1486: }
1487: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1488: return $tokenurl;
1489: } else {
1490: if ($type eq 'thumbnail') {
1491: return '/adm/lonKaputt/genericstudent_tn.gif';
1492: } else {
1493: return '/adm/lonKaputt/lonlogo_broken.gif';
1494: }
1495: }
1496: }
1497:
1498: # -------------------------------------------------------------------- New chat
1499:
1500: sub chatsend {
1501: my ($newentry,$anon,$group)=@_;
1502: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1503: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1504: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1505: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1506: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1507: &escape($newentry)).':'.$group,$chome);
1508: }
1509:
1510: # ------------------------------------------ Find current version of a resource
1511:
1512: sub getversion {
1513: my $fname=&clutter(shift);
1514: unless ($fname=~/^\/res\//) { return -1; }
1515: return ¤tversion(&filelocation('',$fname));
1516: }
1517:
1518: sub currentversion {
1519: my $fname=shift;
1520: my ($result,$cached)=&is_cached_new('resversion',$fname);
1521: if (defined($cached)) { return $result; }
1522: my $author=$fname;
1523: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1524: my ($udom,$uname)=split(/\//,$author);
1525: my $home=homeserver($uname,$udom);
1526: if ($home eq 'no_host') {
1527: return -1;
1528: }
1529: my $answer=reply("currentversion:$fname",$home);
1530: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1531: return -1;
1532: }
1533: return &do_cache_new('resversion',$fname,$answer,600);
1534: }
1535:
1536: # ----------------------------- Subscribe to a resource, return URL if possible
1537:
1538: sub subscribe {
1539: my $fname=shift;
1540: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1541: $fname=~s/[\n\r]//g;
1542: my $author=$fname;
1543: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1544: my ($udom,$uname)=split(/\//,$author);
1545: my $home=homeserver($uname,$udom);
1546: if ($home eq 'no_host') {
1547: return 'not_found';
1548: }
1549: my $answer=reply("sub:$fname",$home);
1550: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1551: $answer.=' by '.$home;
1552: }
1553: return $answer;
1554: }
1555:
1556: # -------------------------------------------------------------- Replicate file
1557:
1558: sub repcopy {
1559: my $filename=shift;
1560: $filename=~s/\/+/\//g;
1561: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1562: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1563: if ($filename=~m|^/home/httpd/html/userfiles/| or
1564: $filename=~m -^/*(uploaded|editupload)/-) {
1565: return &repcopy_userfile($filename);
1566: }
1567: $filename=~s/[\n\r]//g;
1568: my $transname="$filename.in.transfer";
1569: # FIXME: this should flock
1570: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1571: my $remoteurl=subscribe($filename);
1572: if ($remoteurl =~ /^con_lost by/) {
1573: &logthis("Subscribe returned $remoteurl: $filename");
1574: return 'unavailable';
1575: } elsif ($remoteurl eq 'not_found') {
1576: #&logthis("Subscribe returned not_found: $filename");
1577: return 'not_found';
1578: } elsif ($remoteurl =~ /^rejected by/) {
1579: &logthis("Subscribe returned $remoteurl: $filename");
1580: return 'forbidden';
1581: } elsif ($remoteurl eq 'directory') {
1582: return 'ok';
1583: } else {
1584: my $author=$filename;
1585: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1586: my ($udom,$uname)=split(/\//,$author);
1587: my $home=homeserver($uname,$udom);
1588: unless ($home eq $perlvar{'lonHostID'}) {
1589: my @parts=split(/\//,$filename);
1590: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1591: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1592: &logthis("Malconfiguration for replication: $filename");
1593: return 'bad_request';
1594: }
1595: my $count;
1596: for ($count=5;$count<$#parts;$count++) {
1597: $path.="/$parts[$count]";
1598: if ((-e $path)!=1) {
1599: mkdir($path,0777);
1600: }
1601: }
1602: my $ua=new LWP::UserAgent;
1603: my $request=new HTTP::Request('GET',"$remoteurl");
1604: my $response=$ua->request($request,$transname);
1605: if ($response->is_error()) {
1606: unlink($transname);
1607: my $message=$response->status_line;
1608: &logthis("<font color=\"blue\">WARNING:"
1609: ." LWP get: $message: $filename</font>");
1610: return 'unavailable';
1611: } else {
1612: if ($remoteurl!~/\.meta$/) {
1613: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1614: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1615: if ($mresponse->is_error()) {
1616: unlink($filename.'.meta');
1617: &logthis(
1618: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1619: }
1620: }
1621: rename($transname,$filename);
1622: return 'ok';
1623: }
1624: }
1625: }
1626: }
1627:
1628: # ------------------------------------------------ Get server side include body
1629: sub ssi_body {
1630: my ($filelink,%form)=@_;
1631: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1632: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1633: }
1634: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1635: &ssi($filelink,%form));
1636: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
1637: $output=~s/^.*?\<body[^\>]*\>//si;
1638: $output=~s/\<\/body\s*\>.*?$//si;
1639: return $output;
1640: }
1641:
1642: # --------------------------------------------------------- Server Side Include
1643:
1644: sub absolute_url {
1645: my ($host_name) = @_;
1646: my $protocol = ($ENV{'SERVER_PORT'} == 443?'https://':'http://');
1647: if ($host_name eq '') {
1648: $host_name = $ENV{'SERVER_NAME'};
1649: }
1650: return $protocol.$host_name;
1651: }
1652:
1653: sub ssi {
1654:
1655: my ($fn,%form)=@_;
1656:
1657: my $ua=new LWP::UserAgent;
1658:
1659: my $request;
1660:
1661: $form{'no_update_last_known'}=1;
1662: &Apache::lonenc::check_encrypt(\$fn);
1663: if (%form) {
1664: $request=new HTTP::Request('POST',&absolute_url().$fn);
1665: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1666: } else {
1667: $request=new HTTP::Request('GET',&absolute_url().$fn);
1668: }
1669:
1670: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1671: my $response=$ua->request($request);
1672:
1673: return $response->content;
1674: }
1675:
1676: sub externalssi {
1677: my ($url)=@_;
1678: my $ua=new LWP::UserAgent;
1679: my $request=new HTTP::Request('GET',$url);
1680: my $response=$ua->request($request);
1681: return $response->content;
1682: }
1683:
1684: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1685:
1686: sub allowuploaded {
1687: my ($srcurl,$url)=@_;
1688: $url=&clutter(&declutter($url));
1689: my $dir=$url;
1690: $dir=~s/\/[^\/]+$//;
1691: my %httpref=();
1692: my $httpurl=&hreflocation('',$url);
1693: $httpref{'httpref.'.$httpurl}=$srcurl;
1694: &Apache::lonnet::appenv(%httpref);
1695: }
1696:
1697: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1698: # input: action, courseID, current domain, intended
1699: # path to file, source of file, instruction to parse file for objects,
1700: # ref to hash for embedded objects,
1701: # ref to hash for codebase of java objects.
1702: #
1703: # output: url to file (if action was uploaddoc),
1704: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1705: #
1706: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1707: # course.
1708: #
1709: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1710: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1711: # course's home server.
1712: #
1713: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1714: # be copied from $source (current location) to
1715: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1716: # and will then be copied to
1717: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1718: # course's home server.
1719: #
1720: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1721: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1722: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1723: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1724: # in course's home server.
1725: #
1726:
1727: sub process_coursefile {
1728: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1729: my $fetchresult;
1730: my $home=&homeserver($docuname,$docudom);
1731: if ($action eq 'propagate') {
1732: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1733: $home);
1734: } else {
1735: my $fpath = '';
1736: my $fname = $file;
1737: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1738: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1739: my $filepath = &build_filepath($fpath);
1740: if ($action eq 'copy') {
1741: if ($source eq '') {
1742: $fetchresult = 'no source file';
1743: return $fetchresult;
1744: } else {
1745: my $destination = $filepath.'/'.$fname;
1746: rename($source,$destination);
1747: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1748: $home);
1749: }
1750: } elsif ($action eq 'uploaddoc') {
1751: open(my $fh,'>'.$filepath.'/'.$fname);
1752: print $fh $env{'form.'.$source};
1753: close($fh);
1754: if ($parser eq 'parse') {
1755: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1756: unless ($parse_result eq 'ok') {
1757: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1758: }
1759: }
1760: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1761: $home);
1762: if ($fetchresult eq 'ok') {
1763: return '/uploaded/'.$fpath.'/'.$fname;
1764: } else {
1765: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1766: ' to host '.$home.': '.$fetchresult);
1767: return '/adm/notfound.html';
1768: }
1769: }
1770: }
1771: unless ( $fetchresult eq 'ok') {
1772: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1773: ' to host '.$home.': '.$fetchresult);
1774: }
1775: return $fetchresult;
1776: }
1777:
1778: sub build_filepath {
1779: my ($fpath) = @_;
1780: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1781: unless ($fpath eq '') {
1782: my @parts=split('/',$fpath);
1783: foreach my $part (@parts) {
1784: $filepath.= '/'.$part;
1785: if ((-e $filepath)!=1) {
1786: mkdir($filepath,0777);
1787: }
1788: }
1789: }
1790: return $filepath;
1791: }
1792:
1793: sub store_edited_file {
1794: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1795: my $file = $primary_url;
1796: $file =~ s#^/uploaded/$docudom/$docuname/##;
1797: my $fpath = '';
1798: my $fname = $file;
1799: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1800: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1801: my $filepath = &build_filepath($fpath);
1802: open(my $fh,'>'.$filepath.'/'.$fname);
1803: print $fh $content;
1804: close($fh);
1805: my $home=&homeserver($docuname,$docudom);
1806: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1807: $home);
1808: if ($$fetchresult eq 'ok') {
1809: return '/uploaded/'.$fpath.'/'.$fname;
1810: } else {
1811: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1812: ' to host '.$home.': '.$$fetchresult);
1813: return '/adm/notfound.html';
1814: }
1815: }
1816:
1817: sub clean_filename {
1818: my ($fname,$args)=@_;
1819: # Replace Windows backslashes by forward slashes
1820: $fname=~s/\\/\//g;
1821: if (!$args->{'keep_path'}) {
1822: # Get rid of everything but the actual filename
1823: $fname=~s/^.*\/([^\/]+)$/$1/;
1824: }
1825: # Replace spaces by underscores
1826: $fname=~s/\s+/\_/g;
1827: # Replace all other weird characters by nothing
1828: $fname=~s{[^/\w\.\-]}{}g;
1829: # Replace all .\d. sequences with _\d. so they no longer look like version
1830: # numbers
1831: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1832: return $fname;
1833: }
1834:
1835: # --------------- Take an uploaded file and put it into the userfiles directory
1836: # input: $formname - the contents of the file are in $env{"form.$formname"}
1837: # the desired filenam is in $env{"form.$formname.filename"}
1838: # $coursedoc - if true up to the current course
1839: # if false
1840: # $subdir - directory in userfile to store the file into
1841: # $parser - instruction to parse file for objects ($parser = parse)
1842: # $allfiles - reference to hash for embedded objects
1843: # $codebase - reference to hash for codebase of java objects
1844: # $desuname - username for permanent storage of uploaded file
1845: # $dsetudom - domain for permanaent storage of uploaded file
1846: # $thumbwidth - width (pixels) of thumbnail to make for uploaded image
1847: # $thumbheight - height (pixels) of thumbnail to make for uploaded image
1848: #
1849: # output: url of file in userspace, or error: <message>
1850: # or /adm/notfound.html if failure to upload occurse
1851:
1852:
1853: sub userfileupload {
1854: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,
1855: $destudom,$thumbwidth,$thumbheight)=@_;
1856: if (!defined($subdir)) { $subdir='unknown'; }
1857: my $fname=$env{'form.'.$formname.'.filename'};
1858: $fname=&clean_filename($fname);
1859: # See if there is anything left
1860: unless ($fname) { return 'error: no uploaded file'; }
1861: chop($env{'form.'.$formname});
1862: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1863: my $now = time;
1864: my $filepath = 'tmp/helprequests/'.$now;
1865: my @parts=split(/\//,$filepath);
1866: my $fullpath = $perlvar{'lonDaemons'};
1867: for (my $i=0;$i<@parts;$i++) {
1868: $fullpath .= '/'.$parts[$i];
1869: if ((-e $fullpath)!=1) {
1870: mkdir($fullpath,0777);
1871: }
1872: }
1873: open(my $fh,'>'.$fullpath.'/'.$fname);
1874: print $fh $env{'form.'.$formname};
1875: close($fh);
1876: return $fullpath.'/'.$fname;
1877: } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
1878: my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
1879: '_'.$env{'user.domain'}.'/pending';
1880: my @parts=split(/\//,$filepath);
1881: my $fullpath = $perlvar{'lonDaemons'};
1882: for (my $i=0;$i<@parts;$i++) {
1883: $fullpath .= '/'.$parts[$i];
1884: if ((-e $fullpath)!=1) {
1885: mkdir($fullpath,0777);
1886: }
1887: }
1888: open(my $fh,'>'.$fullpath.'/'.$fname);
1889: print $fh $env{'form.'.$formname};
1890: close($fh);
1891: return $fullpath.'/'.$fname;
1892: }
1893:
1894: # Create the directory if not present
1895: $fname="$subdir/$fname";
1896: if ($coursedoc) {
1897: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1898: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1899: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1900: return &finishuserfileupload($docuname,$docudom,
1901: $formname,$fname,$parser,$allfiles,
1902: $codebase,$thumbwidth,$thumbheight);
1903: } else {
1904: $fname=$env{'form.folder'}.'/'.$fname;
1905: return &process_coursefile('uploaddoc',$docuname,$docudom,
1906: $fname,$formname,$parser,
1907: $allfiles,$codebase);
1908: }
1909: } elsif (defined($destuname)) {
1910: my $docuname=$destuname;
1911: my $docudom=$destudom;
1912: return &finishuserfileupload($docuname,$docudom,$formname,$fname,
1913: $parser,$allfiles,$codebase,
1914: $thumbwidth,$thumbheight);
1915:
1916: } else {
1917: my $docuname=$env{'user.name'};
1918: my $docudom=$env{'user.domain'};
1919: if (exists($env{'form.group'})) {
1920: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1921: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1922: }
1923: return &finishuserfileupload($docuname,$docudom,$formname,$fname,
1924: $parser,$allfiles,$codebase,
1925: $thumbwidth,$thumbheight);
1926: }
1927: }
1928:
1929: sub finishuserfileupload {
1930: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase,
1931: $thumbwidth,$thumbheight) = @_;
1932: my $path=$docudom.'/'.$docuname.'/';
1933: my $filepath=$perlvar{'lonDocRoot'};
1934: my ($fnamepath,$file,$fetchthumb);
1935: $file=$fname;
1936: if ($fname=~m|/|) {
1937: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1938: $path.=$fnamepath.'/';
1939: }
1940: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1941: my $count;
1942: for ($count=4;$count<=$#parts;$count++) {
1943: $filepath.="/$parts[$count]";
1944: if ((-e $filepath)!=1) {
1945: mkdir($filepath,0777);
1946: }
1947: }
1948: # Save the file
1949: {
1950: if (!open(FH,'>'.$filepath.'/'.$file)) {
1951: &logthis('Failed to create '.$filepath.'/'.$file);
1952: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1953: return '/adm/notfound.html';
1954: }
1955: if (!print FH ($env{'form.'.$formname})) {
1956: &logthis('Failed to write to '.$filepath.'/'.$file);
1957: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1958: return '/adm/notfound.html';
1959: }
1960: close(FH);
1961: }
1962: if ($parser eq 'parse') {
1963: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1964: $codebase);
1965: unless ($parse_result eq 'ok') {
1966: &logthis('Failed to parse '.$filepath.$file.
1967: ' for embedded media: '.$parse_result);
1968: }
1969: }
1970: if (($thumbwidth =~ /^\d+$/) && ($thumbheight =~ /^\d+$/)) {
1971: my $input = $filepath.'/'.$file;
1972: my $output = $filepath.'/'.'tn-'.$file;
1973: my $thumbsize = $thumbwidth.'x'.$thumbheight;
1974: system("convert -sample $thumbsize $input $output");
1975: if (-e $filepath.'/'.'tn-'.$file) {
1976: $fetchthumb = 1;
1977: }
1978: }
1979:
1980: # Notify homeserver to grep it
1981: #
1982: my $docuhome=&homeserver($docuname,$docudom);
1983: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1984: if ($fetchresult eq 'ok') {
1985: if ($fetchthumb) {
1986: my $thumbresult= &reply('fetchuserfile:'.$path.'tn-'.$file,$docuhome);
1987: if ($thumbresult ne 'ok') {
1988: &logthis('Failed to transfer '.$path.'tn-'.$file.' to host '.
1989: $docuhome.': '.$thumbresult);
1990: }
1991: }
1992: #
1993: # Return the URL to it
1994: return '/uploaded/'.$path.$file;
1995: } else {
1996: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1997: ': '.$fetchresult);
1998: return '/adm/notfound.html';
1999: }
2000: }
2001:
2002: sub extract_embedded_items {
2003: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
2004: my @state = ();
2005: my %javafiles = (
2006: codebase => '',
2007: code => '',
2008: archive => ''
2009: );
2010: my %mediafiles = (
2011: src => '',
2012: movie => '',
2013: );
2014: my $p;
2015: if ($content) {
2016: $p = HTML::LCParser->new($content);
2017: } else {
2018: $p = HTML::LCParser->new($filepath.'/'.$file);
2019: }
2020: while (my $t=$p->get_token()) {
2021: if ($t->[0] eq 'S') {
2022: my ($tagname, $attr) = ($t->[1],$t->[2]);
2023: push(@state, $tagname);
2024: if (lc($tagname) eq 'allow') {
2025: &add_filetype($allfiles,$attr->{'src'},'src');
2026: }
2027: if (lc($tagname) eq 'img') {
2028: &add_filetype($allfiles,$attr->{'src'},'src');
2029: }
2030: if (lc($tagname) eq 'a') {
2031: &add_filetype($allfiles,$attr->{'href'},'href');
2032: }
2033: if (lc($tagname) eq 'script') {
2034: if ($attr->{'archive'} =~ /\.jar$/i) {
2035: &add_filetype($allfiles,$attr->{'archive'},'archive');
2036: } else {
2037: &add_filetype($allfiles,$attr->{'src'},'src');
2038: }
2039: }
2040: if (lc($tagname) eq 'link') {
2041: if (lc($attr->{'rel'}) eq 'stylesheet') {
2042: &add_filetype($allfiles,$attr->{'href'},'href');
2043: }
2044: }
2045: if (lc($tagname) eq 'object' ||
2046: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
2047: foreach my $item (keys(%javafiles)) {
2048: $javafiles{$item} = '';
2049: }
2050: }
2051: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
2052: my $name = lc($attr->{'name'});
2053: foreach my $item (keys(%javafiles)) {
2054: if ($name eq $item) {
2055: $javafiles{$item} = $attr->{'value'};
2056: last;
2057: }
2058: }
2059: foreach my $item (keys(%mediafiles)) {
2060: if ($name eq $item) {
2061: &add_filetype($allfiles, $attr->{'value'}, 'value');
2062: last;
2063: }
2064: }
2065: }
2066: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
2067: foreach my $item (keys(%javafiles)) {
2068: if ($attr->{$item}) {
2069: $javafiles{$item} = $attr->{$item};
2070: last;
2071: }
2072: }
2073: foreach my $item (keys(%mediafiles)) {
2074: if ($attr->{$item}) {
2075: &add_filetype($allfiles,$attr->{$item},$item);
2076: last;
2077: }
2078: }
2079: }
2080: } elsif ($t->[0] eq 'E') {
2081: my ($tagname) = ($t->[1]);
2082: if ($javafiles{'codebase'} ne '') {
2083: $javafiles{'codebase'} .= '/';
2084: }
2085: if (lc($tagname) eq 'applet' ||
2086: lc($tagname) eq 'object' ||
2087: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
2088: ) {
2089: foreach my $item (keys(%javafiles)) {
2090: if ($item ne 'codebase' && $javafiles{$item} ne '') {
2091: my $file=$javafiles{'codebase'}.$javafiles{$item};
2092: &add_filetype($allfiles,$file,$item);
2093: }
2094: }
2095: }
2096: pop @state;
2097: }
2098: }
2099: return 'ok';
2100: }
2101:
2102: sub add_filetype {
2103: my ($allfiles,$file,$type)=@_;
2104: if (exists($allfiles->{$file})) {
2105: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
2106: push(@{$allfiles->{$file}}, &escape($type));
2107: }
2108: } else {
2109: @{$allfiles->{$file}} = (&escape($type));
2110: }
2111: }
2112:
2113: sub removeuploadedurl {
2114: my ($url)=@_;
2115: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
2116: return &removeuserfile($uname,$udom,$fname);
2117: }
2118:
2119: sub removeuserfile {
2120: my ($docuname,$docudom,$fname)=@_;
2121: my $home=&homeserver($docuname,$docudom);
2122: my $result = &reply("removeuserfile:$docudom/$docuname/$fname",$home);
2123: if ($result eq 'ok') {
2124: if (($fname !~ /\.meta$/) && (&is_portfolio_file($fname))) {
2125: my $metafile = $fname.'.meta';
2126: my $metaresult = &removeuserfile($docuname,$docudom,$metafile);
2127: my $url = "/uploaded/$docudom/$docuname/$fname";
2128: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
2129: my $sqlresult =
2130: &update_portfolio_table($docuname,$docudom,$file,
2131: 'portfolio_metadata',$group,
2132: 'delete');
2133: }
2134: }
2135: return $result;
2136: }
2137:
2138: sub mkdiruserfile {
2139: my ($docuname,$docudom,$dir)=@_;
2140: my $home=&homeserver($docuname,$docudom);
2141: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
2142: }
2143:
2144: sub renameuserfile {
2145: my ($docuname,$docudom,$old,$new)=@_;
2146: my $home=&homeserver($docuname,$docudom);
2147: my $result = &reply("renameuserfile:$docudom:$docuname:".
2148: &escape("$old").':'.&escape("$new"),$home);
2149: if ($result eq 'ok') {
2150: if (($old !~ /\.meta$/) && (&is_portfolio_file($old))) {
2151: my $oldmeta = $old.'.meta';
2152: my $newmeta = $new.'.meta';
2153: my $metaresult =
2154: &renameuserfile($docuname,$docudom,$oldmeta,$newmeta);
2155: my $url = "/uploaded/$docudom/$docuname/$old";
2156: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
2157: my $sqlresult =
2158: &update_portfolio_table($docuname,$docudom,$file,
2159: 'portfolio_metadata',$group,
2160: 'delete');
2161: }
2162: }
2163: return $result;
2164: }
2165:
2166: # ------------------------------------------------------------------------- Log
2167:
2168: sub log {
2169: my ($dom,$nam,$hom,$what)=@_;
2170: return critical("log:$dom:$nam:$what",$hom);
2171: }
2172:
2173: # ------------------------------------------------------------------ Course Log
2174: #
2175: # This routine flushes several buffers of non-mission-critical nature
2176: #
2177:
2178: sub flushcourselogs {
2179: &logthis('Flushing log buffers');
2180: #
2181: # course logs
2182: # This is a log of all transactions in a course, which can be used
2183: # for data mining purposes
2184: #
2185: # It also collects the courseid database, which lists last transaction
2186: # times and course titles for all courseids
2187: #
2188: my %courseidbuffer=();
2189: foreach my $crsid (keys(%courselogs)) {
2190: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
2191: &escape($courselogs{$crsid}),
2192: $coursehombuf{$crsid}) eq 'ok') {
2193: delete $courselogs{$crsid};
2194: } else {
2195: &logthis('Failed to flush log buffer for '.$crsid);
2196: if (length($courselogs{$crsid})>40000) {
2197: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
2198: " exceeded maximum size, deleting.</font>");
2199: delete $courselogs{$crsid};
2200: }
2201: }
2202: $courseidbuffer{$coursehombuf{$crsid}}{$crsid} = {
2203: 'description' => $coursedescrbuf{$crsid},
2204: 'inst_code' => $courseinstcodebuf{$crsid},
2205: 'type' => $coursetypebuf{$crsid},
2206: 'owner' => $courseownerbuf{$crsid},
2207: };
2208: }
2209: #
2210: # Write course id database (reverse lookup) to homeserver of courses
2211: # Is used in pickcourse
2212: #
2213: foreach my $crs_home (keys(%courseidbuffer)) {
2214: my $response = &courseidput(&host_domain($crs_home),
2215: $courseidbuffer{$crs_home},
2216: $crs_home,'timeonly');
2217: }
2218: #
2219: # File accesses
2220: # Writes to the dynamic metadata of resources to get hit counts, etc.
2221: #
2222: foreach my $entry (keys(%accesshash)) {
2223: if ($entry =~ /___count$/) {
2224: my ($dom,$name);
2225: ($dom,$name,undef)=
2226: ($entry=~m{___($match_domain)/($match_name)/(.*)___count$});
2227: if (! defined($dom) || $dom eq '' ||
2228: ! defined($name) || $name eq '') {
2229: my $cid = $env{'request.course.id'};
2230: $dom = $env{'request.'.$cid.'.domain'};
2231: $name = $env{'request.'.$cid.'.num'};
2232: }
2233: my $value = $accesshash{$entry};
2234: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
2235: my %temphash=($url => $value);
2236: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
2237: if ($result eq 'ok') {
2238: delete $accesshash{$entry};
2239: } elsif ($result eq 'unknown_cmd') {
2240: # Target server has old code running on it.
2241: my %temphash=($entry => $value);
2242: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
2243: delete $accesshash{$entry};
2244: }
2245: }
2246: } else {
2247: my ($dom,$name) = ($entry=~m{___($match_domain)/($match_name)/(.*)___(\w+)$});
2248: my %temphash=($entry => $accesshash{$entry});
2249: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
2250: delete $accesshash{$entry};
2251: }
2252: }
2253: }
2254: #
2255: # Roles
2256: # Reverse lookup of user roles for course faculty/staff and co-authorship
2257: #
2258: foreach my $entry (keys(%userrolehash)) {
2259: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
2260: split(/\:/,$entry);
2261: if (&Apache::lonnet::put('nohist_userroles',
2262: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
2263: $rudom,$runame) eq 'ok') {
2264: delete $userrolehash{$entry};
2265: }
2266: }
2267: #
2268: # Reverse lookup of domain roles (dc, ad, li, sc, au)
2269: #
2270: my %domrolebuffer = ();
2271: foreach my $entry (keys %domainrolehash) {
2272: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split(/:/,$entry);
2273: if ($domrolebuffer{$rudom}) {
2274: $domrolebuffer{$rudom}.='&'.&escape($entry).
2275: '='.&escape($domainrolehash{$entry});
2276: } else {
2277: $domrolebuffer{$rudom}.=&escape($entry).
2278: '='.&escape($domainrolehash{$entry});
2279: }
2280: delete $domainrolehash{$entry};
2281: }
2282: foreach my $dom (keys(%domrolebuffer)) {
2283: my %servers = &get_servers($dom,'library');
2284: foreach my $tryserver (keys(%servers)) {
2285: unless (&reply('domroleput:'.$dom.':'.
2286: $domrolebuffer{$dom},$tryserver) eq 'ok') {
2287: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
2288: }
2289: }
2290: }
2291: $dumpcount++;
2292: }
2293:
2294: sub courselog {
2295: my $what=shift;
2296: $what=time.':'.$what;
2297: unless ($env{'request.course.id'}) { return ''; }
2298: $coursedombuf{$env{'request.course.id'}}=
2299: $env{'course.'.$env{'request.course.id'}.'.domain'};
2300: $coursenumbuf{$env{'request.course.id'}}=
2301: $env{'course.'.$env{'request.course.id'}.'.num'};
2302: $coursehombuf{$env{'request.course.id'}}=
2303: $env{'course.'.$env{'request.course.id'}.'.home'};
2304: $coursedescrbuf{$env{'request.course.id'}}=
2305: $env{'course.'.$env{'request.course.id'}.'.description'};
2306: $courseinstcodebuf{$env{'request.course.id'}}=
2307: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
2308: $courseownerbuf{$env{'request.course.id'}}=
2309: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
2310: $coursetypebuf{$env{'request.course.id'}}=
2311: $env{'course.'.$env{'request.course.id'}.'.type'};
2312: if (defined $courselogs{$env{'request.course.id'}}) {
2313: $courselogs{$env{'request.course.id'}}.='&'.$what;
2314: } else {
2315: $courselogs{$env{'request.course.id'}}.=$what;
2316: }
2317: if (length($courselogs{$env{'request.course.id'}})>4048) {
2318: &flushcourselogs();
2319: }
2320: }
2321:
2322: sub courseacclog {
2323: my $fnsymb=shift;
2324: unless ($env{'request.course.id'}) { return ''; }
2325: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
2326: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
2327: $what.=':POST';
2328: # FIXME: Probably ought to escape things....
2329: foreach my $key (keys(%env)) {
2330: if ($key=~/^form\.(.*)/) {
2331: $what.=':'.$1.'='.$env{$key};
2332: }
2333: }
2334: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
2335: # FIXME: We should not be depending on a form parameter that someone
2336: # editing lonsearchcat.pm might change in the future.
2337: if ($env{'form.phase'} eq 'course_search') {
2338: $what.= ':POST';
2339: # FIXME: Probably ought to escape things....
2340: foreach my $element ('courseexp','crsfulltext','crsrelated',
2341: 'crsdiscuss') {
2342: $what.=':'.$element.'='.$env{'form.'.$element};
2343: }
2344: }
2345: }
2346: &courselog($what);
2347: }
2348:
2349: sub countacc {
2350: my $url=&declutter(shift);
2351: return if (! defined($url) || $url eq '');
2352: unless ($env{'request.course.id'}) { return ''; }
2353: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
2354: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
2355: $accesshash{$key}++;
2356: }
2357:
2358: sub linklog {
2359: my ($from,$to)=@_;
2360: $from=&declutter($from);
2361: $to=&declutter($to);
2362: $accesshash{$from.'___'.$to.'___comefrom'}=1;
2363: $accesshash{$to.'___'.$from.'___goto'}=1;
2364: }
2365:
2366: sub userrolelog {
2367: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
2368: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
2369: ($trole=~/^in/) || ($trole=~/^cc/) ||
2370: ($trole=~/^ep/) || ($trole=~/^cr/) ||
2371: ($trole=~/^ta/)) {
2372: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2373: $userrolehash
2374: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2375: =$tend.':'.$tstart;
2376: }
2377: if (($env{'request.role'} =~ /dc\./) &&
2378: (($trole=~/^au/) || ($trole=~/^in/) ||
2379: ($trole=~/^cc/) || ($trole=~/^ep/) ||
2380: ($trole=~/^cr/) || ($trole=~/^ta/))) {
2381: $userrolehash
2382: {$trole.':'.$username.':'.$domain.':'.$env{'user.name'}.':'.$env{'user.domain'}.':'}
2383: =$tend.':'.$tstart;
2384: }
2385: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
2386: ($trole=~/^li/) || ($trole=~/^li/) ||
2387: ($trole=~/^au/) || ($trole=~/^dg/) ||
2388: ($trole=~/^sc/)) {
2389: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2390: $domainrolehash
2391: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2392: = $tend.':'.$tstart;
2393: }
2394: }
2395:
2396: sub get_course_adv_roles {
2397: my $cid=shift;
2398: $cid=$env{'request.course.id'} unless (defined($cid));
2399: my %coursehash=&coursedescription($cid);
2400: my %nothide=();
2401: foreach my $user (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
2402: if ($user !~ /:/) {
2403: $nothide{join(':',split(/[\@]/,$user))}=1;
2404: } else {
2405: $nothide{$user}=1;
2406: }
2407: }
2408: my %returnhash=();
2409: my %dumphash=
2410: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
2411: my $now=time;
2412: foreach my $entry (keys %dumphash) {
2413: my ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2414: if (($tstart) && ($tstart<0)) { next; }
2415: if (($tend) && ($tend<$now)) { next; }
2416: if (($tstart) && ($now<$tstart)) { next; }
2417: my ($role,$username,$domain,$section)=split(/\:/,$entry);
2418: if ($username eq '' || $domain eq '') { next; }
2419: if ((&privileged($username,$domain)) &&
2420: (!$nothide{$username.':'.$domain})) { next; }
2421: if ($role eq 'cr') { next; }
2422: my $key=&plaintext($role);
2423: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
2424: if ($returnhash{$key}) {
2425: $returnhash{$key}.=','.$username.':'.$domain;
2426: } else {
2427: $returnhash{$key}=$username.':'.$domain;
2428: }
2429: }
2430: return %returnhash;
2431: }
2432:
2433: sub get_my_roles {
2434: my ($uname,$udom,$context,$types,$roles,$roledoms,$withsec,$hidepriv)=@_;
2435: unless (defined($uname)) { $uname=$env{'user.name'}; }
2436: unless (defined($udom)) { $udom=$env{'user.domain'}; }
2437: my (%dumphash,%nothide);
2438: if ($context eq 'userroles') {
2439: %dumphash = &dump('roles',$udom,$uname);
2440: } else {
2441: %dumphash=
2442: &dump('nohist_userroles',$udom,$uname);
2443: if ($hidepriv) {
2444: my %coursehash=&coursedescription($udom.'_'.$uname);
2445: foreach my $user (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
2446: if ($user !~ /:/) {
2447: $nothide{join(':',split(/[\@]/,$user))} = 1;
2448: } else {
2449: $nothide{$user} = 1;
2450: }
2451: }
2452: }
2453: }
2454: my %returnhash=();
2455: my $now=time;
2456: foreach my $entry (keys(%dumphash)) {
2457: my ($role,$tend,$tstart);
2458: if ($context eq 'userroles') {
2459: ($role,$tend,$tstart)=split(/_/,$dumphash{$entry});
2460: } else {
2461: ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2462: }
2463: if (($tstart) && ($tstart<0)) { next; }
2464: my $status = 'active';
2465: if (($tend) && ($tend<=$now)) {
2466: $status = 'previous';
2467: }
2468: if (($tstart) && ($now<$tstart)) {
2469: $status = 'future';
2470: }
2471: if (ref($types) eq 'ARRAY') {
2472: if (!grep(/^\Q$status\E$/,@{$types})) {
2473: next;
2474: }
2475: } else {
2476: if ($status ne 'active') {
2477: next;
2478: }
2479: }
2480: my ($rolecode,$username,$domain,$section,$area);
2481: if ($context eq 'userroles') {
2482: ($area,$rolecode) = split(/_/,$entry);
2483: (undef,$domain,$username,$section) = split(/\//,$area);
2484: } else {
2485: ($role,$username,$domain,$section) = split(/\:/,$entry);
2486: }
2487: if (ref($roledoms) eq 'ARRAY') {
2488: if (!grep(/^\Q$domain\E$/,@{$roledoms})) {
2489: next;
2490: }
2491: }
2492: if (ref($roles) eq 'ARRAY') {
2493: if (!grep(/^\Q$role\E$/,@{$roles})) {
2494: if ($role =~ /^cr\//) {
2495: if (!grep(/^cr$/,@{$roles})) {
2496: next;
2497: }
2498: } else {
2499: next;
2500: }
2501: }
2502: }
2503: if ($hidepriv) {
2504: if ((&privileged($username,$domain)) &&
2505: (!$nothide{$username.':'.$domain})) {
2506: next;
2507: }
2508: }
2509: if ($withsec) {
2510: $returnhash{$username.':'.$domain.':'.$role.':'.$section} =
2511: $tstart.':'.$tend;
2512: } else {
2513: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
2514: }
2515: }
2516: return %returnhash;
2517: }
2518:
2519: # ----------------------------------------------------- Frontpage Announcements
2520: #
2521: #
2522:
2523: sub postannounce {
2524: my ($server,$text)=@_;
2525: unless (&allowed('psa',&host_domain($server))) { return 'refused'; }
2526: unless ($text=~/\w/) { $text=''; }
2527: return &reply('setannounce:'.&escape($text),$server);
2528: }
2529:
2530: sub getannounce {
2531:
2532: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
2533: my $announcement='';
2534: while (my $line = <$fh>) { $announcement .= $line; }
2535: close($fh);
2536: if ($announcement=~/\w/) {
2537: return
2538: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
2539: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
2540: } else {
2541: return '';
2542: }
2543: } else {
2544: return '';
2545: }
2546: }
2547:
2548: # ---------------------------------------------------------- Course ID routines
2549: # Deal with domain's nohist_courseid.db files
2550: #
2551:
2552: sub courseidput {
2553: my ($domain,$storehash,$coursehome,$caller) = @_;
2554: my $outcome;
2555: if ($caller eq 'timeonly') {
2556: my $cids = '';
2557: foreach my $item (keys(%$storehash)) {
2558: $cids.=&escape($item).'&';
2559: }
2560: $cids=~s/\&$//;
2561: $outcome = &reply('courseidputhash:'.$domain.':'.$caller.':'.$cids,
2562: $coursehome);
2563: } else {
2564: my $items = '';
2565: foreach my $item (keys(%$storehash)) {
2566: $items.= &escape($item).'='.
2567: &freeze_escape($$storehash{$item}).'&';
2568: }
2569: $items=~s/\&$//;
2570: $outcome = &reply('courseidputhash:'.$domain.':'.$caller.':'.$items,
2571: $coursehome);
2572: }
2573: if ($outcome eq 'unknown_cmd') {
2574: my $what;
2575: foreach my $cid (keys(%$storehash)) {
2576: $what .= &escape($cid).'=';
2577: foreach my $item ('description','inst_code','owner','type') {
2578: $what .= &escape($storehash->{$cid}{$item}).':';
2579: }
2580: $what =~ s/\:$/&/;
2581: }
2582: $what =~ s/\&$//;
2583: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
2584: } else {
2585: return $outcome;
2586: }
2587: }
2588:
2589: sub courseiddump {
2590: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,
2591: $coursefilter,$hostidflag,$hostidref,$typefilter,$regexp_ok)=@_;
2592: my $as_hash = 1;
2593: my %returnhash;
2594: if (!$domfilter) { $domfilter=''; }
2595: my %libserv = &all_library();
2596: foreach my $tryserver (keys(%libserv)) {
2597: if ( ( $hostidflag == 1
2598: && grep(/^\Q$tryserver\E$/,@{$hostidref}) )
2599: || (!defined($hostidflag)) ) {
2600:
2601: if (($domfilter eq '') ||
2602: (&host_domain($tryserver) eq $domfilter)) {
2603: my $rep =
2604: &reply('courseiddump:'.&host_domain($tryserver).':'.
2605: $sincefilter.':'.&escape($descfilter).':'.
2606: &escape($instcodefilter).':'.&escape($ownerfilter).
2607: ':'.&escape($coursefilter).':'.&escape($typefilter).
2608: ':'.&escape($regexp_ok).':'.$as_hash,$tryserver);
2609: my @pairs=split(/\&/,$rep);
2610: foreach my $item (@pairs) {
2611: my ($key,$value)=split(/\=/,$item,2);
2612: $key = &unescape($key);
2613: next if ($key =~ /^error: 2 /);
2614: my $result = &thaw_unescape($value);
2615: if (ref($result) eq 'HASH') {
2616: $returnhash{$key}=$result;
2617: } else {
2618: my @responses = split(/:/,$value);
2619: my @items = ('description','inst_code','owner','type');
2620: for (my $i=0; $i<@responses; $i++) {
2621: $returnhash{$key}{$items[$i]} = &unescape($responses[$i]);
2622: }
2623: }
2624: }
2625: }
2626: }
2627: }
2628: return %returnhash;
2629: }
2630:
2631: # ---------------------------------------------------------- DC e-mail
2632:
2633: sub dcmailput {
2634: my ($domain,$msgid,$message,$server)=@_;
2635: my $status = &Apache::lonnet::critical(
2636: 'dcmailput:'.$domain.':'.&escape($msgid).'='.
2637: &escape($message),$server);
2638: return $status;
2639: }
2640:
2641: sub dcmaildump {
2642: my ($dom,$startdate,$enddate,$senders) = @_;
2643: my %returnhash=();
2644:
2645: if (defined(&domain($dom,'primary'))) {
2646: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
2647: &escape($enddate).':';
2648: my @esc_senders=map { &escape($_)} @$senders;
2649: $cmd.=&escape(join('&',@esc_senders));
2650: foreach my $line (split(/\&/,&reply($cmd,&domain($dom,'primary')))) {
2651: my ($key,$value) = split(/\=/,$line,2);
2652: if (($key) && ($value)) {
2653: $returnhash{&unescape($key)} = &unescape($value);
2654: }
2655: }
2656: }
2657: return %returnhash;
2658: }
2659: # ---------------------------------------------------------- Domain roles
2660:
2661: sub get_domain_roles {
2662: my ($dom,$roles,$startdate,$enddate)=@_;
2663: if (undef($startdate) || $startdate eq '') {
2664: $startdate = '.';
2665: }
2666: if (undef($enddate) || $enddate eq '') {
2667: $enddate = '.';
2668: }
2669: my $rolelist;
2670: if (ref($roles) eq 'ARRAY') {
2671: $rolelist = join(':',@{$roles});
2672: }
2673: my %personnel = ();
2674:
2675: my %servers = &get_servers($dom,'library');
2676: foreach my $tryserver (keys(%servers)) {
2677: %{$personnel{$tryserver}}=();
2678: foreach my $line (split(/\&/,&reply('domrolesdump:'.$dom.':'.
2679: &escape($startdate).':'.
2680: &escape($enddate).':'.
2681: &escape($rolelist), $tryserver))) {
2682: my ($key,$value) = split(/\=/,$line,2);
2683: if (($key) && ($value)) {
2684: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2685: }
2686: }
2687: }
2688: return %personnel;
2689: }
2690:
2691: # ----------------------------------------------------------- Check out an item
2692:
2693: sub get_first_access {
2694: my ($type,$argsymb)=@_;
2695: my ($symb,$courseid,$udom,$uname)=&whichuser();
2696: if ($argsymb) { $symb=$argsymb; }
2697: my ($map,$id,$res)=&decode_symb($symb);
2698: if ($type eq 'course') {
2699: $res='course';
2700: } elsif ($type eq 'map') {
2701: $res=&symbread($map);
2702: } else {
2703: $res=$symb;
2704: }
2705: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2706: return $times{"$courseid\0$res"};
2707: }
2708:
2709: sub set_first_access {
2710: my ($type)=@_;
2711: my ($symb,$courseid,$udom,$uname)=&whichuser();
2712: my ($map,$id,$res)=&decode_symb($symb);
2713: if ($type eq 'course') {
2714: $res='course';
2715: } elsif ($type eq 'map') {
2716: $res=&symbread($map);
2717: } else {
2718: $res=$symb;
2719: }
2720: my $firstaccess=&get_first_access($type,$symb);
2721: if (!$firstaccess) {
2722: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2723: }
2724: return 'already_set';
2725: }
2726:
2727: sub checkout {
2728: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2729: my $now=time;
2730: my $lonhost=$perlvar{'lonHostID'};
2731: my $infostr=&escape(
2732: 'CHECKOUTTOKEN&'.
2733: $tuname.'&'.
2734: $tudom.'&'.
2735: $tcrsid.'&'.
2736: $symb.'&'.
2737: $now.'&'.$ENV{'REMOTE_ADDR'});
2738: my $token=&reply('tmpput:'.$infostr,$lonhost);
2739: if ($token=~/^error\:/) {
2740: &logthis("<font color=\"blue\">WARNING: ".
2741: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2742: "</font>");
2743: return '';
2744: }
2745:
2746: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2747: $token=~tr/a-z/A-Z/;
2748:
2749: my %infohash=('resource.0.outtoken' => $token,
2750: 'resource.0.checkouttime' => $now,
2751: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2752:
2753: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2754: return '';
2755: } else {
2756: &logthis("<font color=\"blue\">WARNING: ".
2757: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2758: "</font>");
2759: }
2760:
2761: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2762: &escape('Checkout '.$infostr.' - '.
2763: $token)) ne 'ok') {
2764: return '';
2765: } else {
2766: &logthis("<font color=\"blue\">WARNING: ".
2767: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2768: "</font>");
2769: }
2770: return $token;
2771: }
2772:
2773: # ------------------------------------------------------------ Check in an item
2774:
2775: sub checkin {
2776: my $token=shift;
2777: my $now=time;
2778: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2779: $lonhost=~tr/A-Z/a-z/;
2780: my $dtoken=$ta.'_'.&hostname($lonhost).'_'.$tb;
2781: $dtoken=~s/\W/\_/g;
2782: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2783: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2784:
2785: unless (($tuname) && ($tudom)) {
2786: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2787: return '';
2788: }
2789:
2790: unless (&allowed('mgr',$tcrsid)) {
2791: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2792: $env{'user.name'}.' - '.$env{'user.domain'});
2793: return '';
2794: }
2795:
2796: my %infohash=('resource.0.intoken' => $token,
2797: 'resource.0.checkintime' => $now,
2798: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2799:
2800: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2801: return '';
2802: }
2803:
2804: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2805: &escape('Checkin - '.$token)) ne 'ok') {
2806: return '';
2807: }
2808:
2809: return ($symb,$tuname,$tudom,$tcrsid);
2810: }
2811:
2812: # --------------------------------------------- Set Expire Date for Spreadsheet
2813:
2814: sub expirespread {
2815: my ($uname,$udom,$stype,$usymb)=@_;
2816: my $cid=$env{'request.course.id'};
2817: if ($cid) {
2818: my $now=time;
2819: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2820: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2821: $env{'course.'.$cid.'.num'}.
2822: ':nohist_expirationdates:'.
2823: &escape($key).'='.$now,
2824: $env{'course.'.$cid.'.home'})
2825: }
2826: return 'ok';
2827: }
2828:
2829: # ----------------------------------------------------- Devalidate Spreadsheets
2830:
2831: sub devalidate {
2832: my ($symb,$uname,$udom)=@_;
2833: my $cid=$env{'request.course.id'};
2834: if ($cid) {
2835: # delete the stored spreadsheets for
2836: # - the student level sheet of this user in course's homespace
2837: # - the assessment level sheet for this resource
2838: # for this user in user's homespace
2839: # - current conditional state info
2840: my $key=$uname.':'.$udom.':';
2841: my $status=
2842: &del('nohist_calculatedsheets',
2843: [$key.'studentcalc:'],
2844: $env{'course.'.$cid.'.domain'},
2845: $env{'course.'.$cid.'.num'})
2846: .' '.
2847: &del('nohist_calculatedsheets_'.$cid,
2848: [$key.'assesscalc:'.$symb],$udom,$uname);
2849: unless ($status eq 'ok ok') {
2850: &logthis('Could not devalidate spreadsheet '.
2851: $uname.' at '.$udom.' for '.
2852: $symb.': '.$status);
2853: }
2854: &delenv('user.state.'.$cid);
2855: }
2856: }
2857:
2858: sub get_scalar {
2859: my ($string,$end) = @_;
2860: my $value;
2861: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2862: $value = $1;
2863: } elsif ($$string =~ s/^([^&]*?)&//) {
2864: $value = $1;
2865: }
2866: return &unescape($value);
2867: }
2868:
2869: sub array2str {
2870: my (@array) = @_;
2871: my $result=&arrayref2str(\@array);
2872: $result=~s/^__ARRAY_REF__//;
2873: $result=~s/__END_ARRAY_REF__$//;
2874: return $result;
2875: }
2876:
2877: sub arrayref2str {
2878: my ($arrayref) = @_;
2879: my $result='__ARRAY_REF__';
2880: foreach my $elem (@$arrayref) {
2881: if(ref($elem) eq 'ARRAY') {
2882: $result.=&arrayref2str($elem).'&';
2883: } elsif(ref($elem) eq 'HASH') {
2884: $result.=&hashref2str($elem).'&';
2885: } elsif(ref($elem)) {
2886: #print("Got a ref of ".(ref($elem))." skipping.");
2887: } else {
2888: $result.=&escape($elem).'&';
2889: }
2890: }
2891: $result=~s/\&$//;
2892: $result .= '__END_ARRAY_REF__';
2893: return $result;
2894: }
2895:
2896: sub hash2str {
2897: my (%hash) = @_;
2898: my $result=&hashref2str(\%hash);
2899: $result=~s/^__HASH_REF__//;
2900: $result=~s/__END_HASH_REF__$//;
2901: return $result;
2902: }
2903:
2904: sub hashref2str {
2905: my ($hashref)=@_;
2906: my $result='__HASH_REF__';
2907: foreach my $key (sort(keys(%$hashref))) {
2908: if (ref($key) eq 'ARRAY') {
2909: $result.=&arrayref2str($key).'=';
2910: } elsif (ref($key) eq 'HASH') {
2911: $result.=&hashref2str($key).'=';
2912: } elsif (ref($key)) {
2913: $result.='=';
2914: #print("Got a ref of ".(ref($key))." skipping.");
2915: } else {
2916: if ($key) {$result.=&escape($key).'=';} else { last; }
2917: }
2918:
2919: if(ref($hashref->{$key}) eq 'ARRAY') {
2920: $result.=&arrayref2str($hashref->{$key}).'&';
2921: } elsif(ref($hashref->{$key}) eq 'HASH') {
2922: $result.=&hashref2str($hashref->{$key}).'&';
2923: } elsif(ref($hashref->{$key})) {
2924: $result.='&';
2925: #print("Got a ref of ".(ref($hashref->{$key}))." skipping.");
2926: } else {
2927: $result.=&escape($hashref->{$key}).'&';
2928: }
2929: }
2930: $result=~s/\&$//;
2931: $result .= '__END_HASH_REF__';
2932: return $result;
2933: }
2934:
2935: sub str2hash {
2936: my ($string)=@_;
2937: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2938: return %$hash;
2939: }
2940:
2941: sub str2hashref {
2942: my ($string) = @_;
2943:
2944: my %hash;
2945:
2946: if($string !~ /^__HASH_REF__/) {
2947: if (! ($string eq '' || !defined($string))) {
2948: $hash{'error'}='Not hash reference';
2949: }
2950: return (\%hash, $string);
2951: }
2952:
2953: $string =~ s/^__HASH_REF__//;
2954:
2955: while($string !~ /^__END_HASH_REF__/) {
2956: #key
2957: my $key='';
2958: if($string =~ /^__HASH_REF__/) {
2959: ($key, $string)=&str2hashref($string);
2960: if(defined($key->{'error'})) {
2961: $hash{'error'}='Bad data';
2962: return (\%hash, $string);
2963: }
2964: } elsif($string =~ /^__ARRAY_REF__/) {
2965: ($key, $string)=&str2arrayref($string);
2966: if($key->[0] eq 'Array reference error') {
2967: $hash{'error'}='Bad data';
2968: return (\%hash, $string);
2969: }
2970: } else {
2971: $string =~ s/^(.*?)=//;
2972: $key=&unescape($1);
2973: }
2974: $string =~ s/^=//;
2975:
2976: #value
2977: my $value='';
2978: if($string =~ /^__HASH_REF__/) {
2979: ($value, $string)=&str2hashref($string);
2980: if(defined($value->{'error'})) {
2981: $hash{'error'}='Bad data';
2982: return (\%hash, $string);
2983: }
2984: } elsif($string =~ /^__ARRAY_REF__/) {
2985: ($value, $string)=&str2arrayref($string);
2986: if($value->[0] eq 'Array reference error') {
2987: $hash{'error'}='Bad data';
2988: return (\%hash, $string);
2989: }
2990: } else {
2991: $value=&get_scalar(\$string,'__END_HASH_REF__');
2992: }
2993: $string =~ s/^&//;
2994:
2995: $hash{$key}=$value;
2996: }
2997:
2998: $string =~ s/^__END_HASH_REF__//;
2999:
3000: return (\%hash, $string);
3001: }
3002:
3003: sub str2array {
3004: my ($string)=@_;
3005: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
3006: return @$array;
3007: }
3008:
3009: sub str2arrayref {
3010: my ($string) = @_;
3011: my @array;
3012:
3013: if($string !~ /^__ARRAY_REF__/) {
3014: if (! ($string eq '' || !defined($string))) {
3015: $array[0]='Array reference error';
3016: }
3017: return (\@array, $string);
3018: }
3019:
3020: $string =~ s/^__ARRAY_REF__//;
3021:
3022: while($string !~ /^__END_ARRAY_REF__/) {
3023: my $value='';
3024: if($string =~ /^__HASH_REF__/) {
3025: ($value, $string)=&str2hashref($string);
3026: if(defined($value->{'error'})) {
3027: $array[0] ='Array reference error';
3028: return (\@array, $string);
3029: }
3030: } elsif($string =~ /^__ARRAY_REF__/) {
3031: ($value, $string)=&str2arrayref($string);
3032: if($value->[0] eq 'Array reference error') {
3033: $array[0] ='Array reference error';
3034: return (\@array, $string);
3035: }
3036: } else {
3037: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
3038: }
3039: $string =~ s/^&//;
3040:
3041: push(@array, $value);
3042: }
3043:
3044: $string =~ s/^__END_ARRAY_REF__//;
3045:
3046: return (\@array, $string);
3047: }
3048:
3049: # -------------------------------------------------------------------Temp Store
3050:
3051: sub tmpreset {
3052: my ($symb,$namespace,$domain,$stuname) = @_;
3053: if (!$symb) {
3054: $symb=&symbread();
3055: if (!$symb) { $symb= $env{'request.url'}; }
3056: }
3057: $symb=escape($symb);
3058:
3059: if (!$namespace) { $namespace=$env{'request.state'}; }
3060: $namespace=~s/\//\_/g;
3061: $namespace=~s/\W//g;
3062:
3063: if (!$domain) { $domain=$env{'user.domain'}; }
3064: if (!$stuname) { $stuname=$env{'user.name'}; }
3065: if ($domain eq 'public' && $stuname eq 'public') {
3066: $stuname=$ENV{'REMOTE_ADDR'};
3067: }
3068: my $path=$perlvar{'lonDaemons'}.'/tmp';
3069: my %hash;
3070: if (tie(%hash,'GDBM_File',
3071: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
3072: &GDBM_WRCREAT(),0640)) {
3073: foreach my $key (keys %hash) {
3074: if ($key=~ /:$symb/) {
3075: delete($hash{$key});
3076: }
3077: }
3078: }
3079: }
3080:
3081: sub tmpstore {
3082: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
3083:
3084: if (!$symb) {
3085: $symb=&symbread();
3086: if (!$symb) { $symb= $env{'request.url'}; }
3087: }
3088: $symb=escape($symb);
3089:
3090: if (!$namespace) {
3091: # I don't think we would ever want to store this for a course.
3092: # it seems this will only be used if we don't have a course.
3093: #$namespace=$env{'request.course.id'};
3094: #if (!$namespace) {
3095: $namespace=$env{'request.state'};
3096: #}
3097: }
3098: $namespace=~s/\//\_/g;
3099: $namespace=~s/\W//g;
3100: if (!$domain) { $domain=$env{'user.domain'}; }
3101: if (!$stuname) { $stuname=$env{'user.name'}; }
3102: if ($domain eq 'public' && $stuname eq 'public') {
3103: $stuname=$ENV{'REMOTE_ADDR'};
3104: }
3105: my $now=time;
3106: my %hash;
3107: my $path=$perlvar{'lonDaemons'}.'/tmp';
3108: if (tie(%hash,'GDBM_File',
3109: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
3110: &GDBM_WRCREAT(),0640)) {
3111: $hash{"version:$symb"}++;
3112: my $version=$hash{"version:$symb"};
3113: my $allkeys='';
3114: foreach my $key (keys(%$storehash)) {
3115: $allkeys.=$key.':';
3116: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
3117: }
3118: $hash{"$version:$symb:timestamp"}=$now;
3119: $allkeys.='timestamp';
3120: $hash{"$version:keys:$symb"}=$allkeys;
3121: if (untie(%hash)) {
3122: return 'ok';
3123: } else {
3124: return "error:$!";
3125: }
3126: } else {
3127: return "error:$!";
3128: }
3129: }
3130:
3131: # -----------------------------------------------------------------Temp Restore
3132:
3133: sub tmprestore {
3134: my ($symb,$namespace,$domain,$stuname) = @_;
3135:
3136: if (!$symb) {
3137: $symb=&symbread();
3138: if (!$symb) { $symb= $env{'request.url'}; }
3139: }
3140: $symb=escape($symb);
3141:
3142: if (!$namespace) { $namespace=$env{'request.state'}; }
3143:
3144: if (!$domain) { $domain=$env{'user.domain'}; }
3145: if (!$stuname) { $stuname=$env{'user.name'}; }
3146: if ($domain eq 'public' && $stuname eq 'public') {
3147: $stuname=$ENV{'REMOTE_ADDR'};
3148: }
3149: my %returnhash;
3150: $namespace=~s/\//\_/g;
3151: $namespace=~s/\W//g;
3152: my %hash;
3153: my $path=$perlvar{'lonDaemons'}.'/tmp';
3154: if (tie(%hash,'GDBM_File',
3155: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
3156: &GDBM_READER(),0640)) {
3157: my $version=$hash{"version:$symb"};
3158: $returnhash{'version'}=$version;
3159: my $scope;
3160: for ($scope=1;$scope<=$version;$scope++) {
3161: my $vkeys=$hash{"$scope:keys:$symb"};
3162: my @keys=split(/:/,$vkeys);
3163: my $key;
3164: $returnhash{"$scope:keys"}=$vkeys;
3165: foreach $key (@keys) {
3166: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
3167: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
3168: }
3169: }
3170: if (!(untie(%hash))) {
3171: return "error:$!";
3172: }
3173: } else {
3174: return "error:$!";
3175: }
3176: return %returnhash;
3177: }
3178:
3179: # ----------------------------------------------------------------------- Store
3180:
3181: sub store {
3182: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
3183: my $home='';
3184:
3185: if ($stuname) { $home=&homeserver($stuname,$domain); }
3186:
3187: $symb=&symbclean($symb);
3188: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
3189:
3190: if (!$domain) { $domain=$env{'user.domain'}; }
3191: if (!$stuname) { $stuname=$env{'user.name'}; }
3192:
3193: &devalidate($symb,$stuname,$domain);
3194:
3195: $symb=escape($symb);
3196: if (!$namespace) {
3197: unless ($namespace=$env{'request.course.id'}) {
3198: return '';
3199: }
3200: }
3201: if (!$home) { $home=$env{'user.home'}; }
3202:
3203: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
3204: $$storehash{'host'}=$perlvar{'lonHostID'};
3205:
3206: my $namevalue='';
3207: foreach my $key (keys(%$storehash)) {
3208: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3209: }
3210: $namevalue=~s/\&$//;
3211: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
3212: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
3213: }
3214:
3215: # -------------------------------------------------------------- Critical Store
3216:
3217: sub cstore {
3218: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
3219: my $home='';
3220:
3221: if ($stuname) { $home=&homeserver($stuname,$domain); }
3222:
3223: $symb=&symbclean($symb);
3224: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
3225:
3226: if (!$domain) { $domain=$env{'user.domain'}; }
3227: if (!$stuname) { $stuname=$env{'user.name'}; }
3228:
3229: &devalidate($symb,$stuname,$domain);
3230:
3231: $symb=escape($symb);
3232: if (!$namespace) {
3233: unless ($namespace=$env{'request.course.id'}) {
3234: return '';
3235: }
3236: }
3237: if (!$home) { $home=$env{'user.home'}; }
3238:
3239: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
3240: $$storehash{'host'}=$perlvar{'lonHostID'};
3241:
3242: my $namevalue='';
3243: foreach my $key (keys(%$storehash)) {
3244: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3245: }
3246: $namevalue=~s/\&$//;
3247: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
3248: return critical
3249: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
3250: }
3251:
3252: # --------------------------------------------------------------------- Restore
3253:
3254: sub restore {
3255: my ($symb,$namespace,$domain,$stuname) = @_;
3256: my $home='';
3257:
3258: if ($stuname) { $home=&homeserver($stuname,$domain); }
3259:
3260: if (!$symb) {
3261: unless ($symb=escape(&symbread())) { return ''; }
3262: } else {
3263: $symb=&escape(&symbclean($symb));
3264: }
3265: if (!$namespace) {
3266: unless ($namespace=$env{'request.course.id'}) {
3267: return '';
3268: }
3269: }
3270: if (!$domain) { $domain=$env{'user.domain'}; }
3271: if (!$stuname) { $stuname=$env{'user.name'}; }
3272: if (!$home) { $home=$env{'user.home'}; }
3273: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
3274:
3275: my %returnhash=();
3276: foreach my $line (split(/\&/,$answer)) {
3277: my ($name,$value)=split(/\=/,$line);
3278: $returnhash{&unescape($name)}=&thaw_unescape($value);
3279: }
3280: my $version;
3281: for ($version=1;$version<=$returnhash{'version'};$version++) {
3282: foreach my $item (split(/\:/,$returnhash{$version.':keys'})) {
3283: $returnhash{$item}=$returnhash{$version.':'.$item};
3284: }
3285: }
3286: return %returnhash;
3287: }
3288:
3289: # ---------------------------------------------------------- Course Description
3290:
3291: sub coursedescription {
3292: my ($courseid,$args)=@_;
3293: $courseid=~s/^\///;
3294: $courseid=~s/\_/\//g;
3295: my ($cdomain,$cnum)=split(/\//,$courseid);
3296: my $chome=&homeserver($cnum,$cdomain);
3297: my $normalid=$cdomain.'_'.$cnum;
3298: # need to always cache even if we get errors otherwise we keep
3299: # trying and trying and trying to get the course description.
3300: my %envhash=();
3301: my %returnhash=();
3302:
3303: my $expiretime=600;
3304: if ($env{'request.course.id'} eq $normalid) {
3305: $expiretime=120;
3306: }
3307:
3308: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
3309: if (!$args->{'freshen_cache'}
3310: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
3311: foreach my $key (keys(%env)) {
3312: next if ($key !~ /^\Q$prefix\E(.*)/);
3313: my ($setting) = $1;
3314: $returnhash{$setting} = $env{$key};
3315: }
3316: return %returnhash;
3317: }
3318:
3319: # get the data agin
3320: if (!$args->{'one_time'}) {
3321: $envhash{'course.'.$normalid.'.last_cache'}=time;
3322: }
3323:
3324: if ($chome ne 'no_host') {
3325: %returnhash=&dump('environment',$cdomain,$cnum);
3326: if (!exists($returnhash{'con_lost'})) {
3327: $returnhash{'home'}= $chome;
3328: $returnhash{'domain'} = $cdomain;
3329: $returnhash{'num'} = $cnum;
3330: if (!defined($returnhash{'type'})) {
3331: $returnhash{'type'} = 'Course';
3332: }
3333: while (my ($name,$value) = each %returnhash) {
3334: $envhash{'course.'.$normalid.'.'.$name}=$value;
3335: }
3336: $returnhash{'url'}=&clutter($returnhash{'url'});
3337: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
3338: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
3339: $envhash{'course.'.$normalid.'.home'}=$chome;
3340: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
3341: $envhash{'course.'.$normalid.'.num'}=$cnum;
3342: }
3343: }
3344: if (!$args->{'one_time'}) {
3345: &appenv(%envhash);
3346: }
3347: return %returnhash;
3348: }
3349:
3350: # -------------------------------------------------See if a user is privileged
3351:
3352: sub privileged {
3353: my ($username,$domain)=@_;
3354: my $rolesdump=&reply("dump:$domain:$username:roles",
3355: &homeserver($username,$domain));
3356: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
3357: my $now=time;
3358: if ($rolesdump ne '') {
3359: foreach my $entry (split(/&/,$rolesdump)) {
3360: if ($entry!~/^rolesdef_/) {
3361: my ($area,$role)=split(/=/,$entry);
3362: $area=~s/\_\w\w$//;
3363: my ($trole,$tend,$tstart)=split(/_/,$role);
3364: if (($trole eq 'dc') || ($trole eq 'su')) {
3365: my $active=1;
3366: if ($tend) {
3367: if ($tend<$now) { $active=0; }
3368: }
3369: if ($tstart) {
3370: if ($tstart>$now) { $active=0; }
3371: }
3372: if ($active) { return 1; }
3373: }
3374: }
3375: }
3376: }
3377: return 0;
3378: }
3379:
3380: # -------------------------------------------------------- Get user privileges
3381:
3382: sub rolesinit {
3383: my ($domain,$username,$authhost)=@_;
3384: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
3385: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
3386: my %allroles=();
3387: my %allgroups=();
3388: my $now=time;
3389: my %userroles = ('user.login.time' => $now);
3390: my $group_privs;
3391:
3392: if ($rolesdump ne '') {
3393: foreach my $entry (split(/&/,$rolesdump)) {
3394: if ($entry!~/^rolesdef_/) {
3395: my ($area,$role)=split(/=/,$entry);
3396: $area=~s/\_\w\w$//;
3397: my ($trole,$tend,$tstart,$group_privs);
3398: if ($role=~/^cr/) {
3399: if ($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|) {
3400: ($trole,my $trest)=($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|);
3401: ($tend,$tstart)=split('_',$trest);
3402: } else {
3403: $trole=$role;
3404: }
3405: } elsif ($role =~ m|^gr/|) {
3406: ($trole,$tend,$tstart) = split(/_/,$role);
3407: ($trole,$group_privs) = split(/\//,$trole);
3408: $group_privs = &unescape($group_privs);
3409: } else {
3410: ($trole,$tend,$tstart)=split(/_/,$role);
3411: }
3412: my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
3413: $username);
3414: @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
3415: if (($tend!=0) && ($tend<$now)) { $trole=''; }
3416: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
3417: if (($area ne '') && ($trole ne '')) {
3418: my $spec=$trole.'.'.$area;
3419: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
3420: if ($trole =~ /^cr\//) {
3421: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
3422: } elsif ($trole eq 'gr') {
3423: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
3424: } else {
3425: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
3426: }
3427: }
3428: }
3429: }
3430: my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
3431: $userroles{'user.adv'} = $adv;
3432: $userroles{'user.author'} = $author;
3433: $env{'user.adv'}=$adv;
3434: }
3435: return \%userroles;
3436: }
3437:
3438: sub set_arearole {
3439: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
3440: # log the associated role with the area
3441: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
3442: return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
3443: }
3444:
3445: sub custom_roleprivs {
3446: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
3447: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
3448: my $homsvr=homeserver($rauthor,$rdomain);
3449: if (&hostname($homsvr) ne '') {
3450: my ($rdummy,$roledef)=
3451: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
3452: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
3453: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
3454: if (defined($syspriv)) {
3455: $$allroles{'cm./'}.=':'.$syspriv;
3456: $$allroles{$spec.'./'}.=':'.$syspriv;
3457: }
3458: if ($tdomain ne '') {
3459: if (defined($dompriv)) {
3460: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
3461: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
3462: }
3463: if (($trest ne '') && (defined($coursepriv))) {
3464: $$allroles{'cm.'.$area}.=':'.$coursepriv;
3465: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
3466: }
3467: }
3468: }
3469: }
3470: }
3471:
3472: sub group_roleprivs {
3473: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
3474: my $access = 1;
3475: my $now = time;
3476: if (($tend!=0) && ($tend<$now)) { $access = 0; }
3477: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
3478: if ($access) {
3479: my ($course,$group) = ($area =~ m|(/$match_domain/$match_courseid)/([^/]+)$|);
3480: $$allgroups{$course}{$group} .=':'.$group_privs;
3481: }
3482: }
3483:
3484: sub standard_roleprivs {
3485: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
3486: if (defined($pr{$trole.':s'})) {
3487: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
3488: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
3489: }
3490: if ($tdomain ne '') {
3491: if (defined($pr{$trole.':d'})) {
3492: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3493: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3494: }
3495: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
3496: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
3497: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
3498: }
3499: }
3500: }
3501:
3502: sub set_userprivs {
3503: my ($userroles,$allroles,$allgroups) = @_;
3504: my $author=0;
3505: my $adv=0;
3506: my %grouproles = ();
3507: if (keys(%{$allgroups}) > 0) {
3508: foreach my $role (keys %{$allroles}) {
3509: my ($trole,$area,$sec,$extendedarea);
3510: if ($role =~ m-^(\w+|cr/$match_domain/$match_username/\w+)\.(/$match_domain/$match_courseid)(/?\w*)\.-) {
3511: $trole = $1;
3512: $area = $2;
3513: $sec = $3;
3514: $extendedarea = $area.$sec;
3515: if (exists($$allgroups{$area})) {
3516: foreach my $group (keys(%{$$allgroups{$area}})) {
3517: my $spec = $trole.'.'.$extendedarea;
3518: $grouproles{$spec.'.'.$area.'/'.$group} =
3519: $$allgroups{$area}{$group};
3520: }
3521: }
3522: }
3523: }
3524: }
3525: foreach my $group (keys(%grouproles)) {
3526: $$allroles{$group} = $grouproles{$group};
3527: }
3528: foreach my $role (keys(%{$allroles})) {
3529: my %thesepriv;
3530: if (($role=~/^au/) || ($role=~/^ca/) || ($role=~/^aa/)) { $author=1; }
3531: foreach my $item (split(/:/,$$allroles{$role})) {
3532: if ($item ne '') {
3533: my ($privilege,$restrictions)=split(/&/,$item);
3534: if ($restrictions eq '') {
3535: $thesepriv{$privilege}='F';
3536: } elsif ($thesepriv{$privilege} ne 'F') {
3537: $thesepriv{$privilege}.=$restrictions;
3538: }
3539: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
3540: }
3541: }
3542: my $thesestr='';
3543: foreach my $priv (keys(%thesepriv)) {
3544: $thesestr.=':'.$priv.'&'.$thesepriv{$priv};
3545: }
3546: $userroles->{'user.priv.'.$role} = $thesestr;
3547: }
3548: return ($author,$adv);
3549: }
3550:
3551: # --------------------------------------------------------------- get interface
3552:
3553: sub get {
3554: my ($namespace,$storearr,$udomain,$uname)=@_;
3555: my $items='';
3556: foreach my $item (@$storearr) {
3557: $items.=&escape($item).'&';
3558: }
3559: $items=~s/\&$//;
3560: if (!$udomain) { $udomain=$env{'user.domain'}; }
3561: if (!$uname) { $uname=$env{'user.name'}; }
3562: my $uhome=&homeserver($uname,$udomain);
3563:
3564: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
3565: my @pairs=split(/\&/,$rep);
3566: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
3567: return @pairs;
3568: }
3569: my %returnhash=();
3570: my $i=0;
3571: foreach my $item (@$storearr) {
3572: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3573: $i++;
3574: }
3575: return %returnhash;
3576: }
3577:
3578: # --------------------------------------------------------------- del interface
3579:
3580: sub del {
3581: my ($namespace,$storearr,$udomain,$uname)=@_;
3582: my $items='';
3583: foreach my $item (@$storearr) {
3584: $items.=&escape($item).'&';
3585: }
3586: $items=~s/\&$//;
3587: if (!$udomain) { $udomain=$env{'user.domain'}; }
3588: if (!$uname) { $uname=$env{'user.name'}; }
3589: my $uhome=&homeserver($uname,$udomain);
3590:
3591: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
3592: }
3593:
3594: # -------------------------------------------------------------- dump interface
3595:
3596: sub dump {
3597: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3598: if (!$udomain) { $udomain=$env{'user.domain'}; }
3599: if (!$uname) { $uname=$env{'user.name'}; }
3600: my $uhome=&homeserver($uname,$udomain);
3601: if ($regexp) {
3602: $regexp=&escape($regexp);
3603: } else {
3604: $regexp='.';
3605: }
3606: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3607: my @pairs=split(/\&/,$rep);
3608: my %returnhash=();
3609: foreach my $item (@pairs) {
3610: my ($key,$value)=split(/=/,$item,2);
3611: $key = &unescape($key);
3612: next if ($key =~ /^error: 2 /);
3613: $returnhash{$key}=&thaw_unescape($value);
3614: }
3615: return %returnhash;
3616: }
3617:
3618: # --------------------------------------------------------- dumpstore interface
3619:
3620: sub dumpstore {
3621: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3622: if (!$udomain) { $udomain=$env{'user.domain'}; }
3623: if (!$uname) { $uname=$env{'user.name'}; }
3624: my $uhome=&homeserver($uname,$udomain);
3625: if ($regexp) {
3626: $regexp=&escape($regexp);
3627: } else {
3628: $regexp='.';
3629: }
3630: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3631: my @pairs=split(/\&/,$rep);
3632: my %returnhash=();
3633: foreach my $item (@pairs) {
3634: my ($key,$value)=split(/=/,$item,2);
3635: next if ($key =~ /^error: 2 /);
3636: $returnhash{$key}=&thaw_unescape($value);
3637: }
3638: return %returnhash;
3639: }
3640:
3641: # -------------------------------------------------------------- keys interface
3642:
3643: sub getkeys {
3644: my ($namespace,$udomain,$uname)=@_;
3645: if (!$udomain) { $udomain=$env{'user.domain'}; }
3646: if (!$uname) { $uname=$env{'user.name'}; }
3647: my $uhome=&homeserver($uname,$udomain);
3648: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
3649: my @keyarray=();
3650: foreach my $key (split(/\&/,$rep)) {
3651: next if ($key =~ /^error: 2 /);
3652: push(@keyarray,&unescape($key));
3653: }
3654: return @keyarray;
3655: }
3656:
3657: # --------------------------------------------------------------- currentdump
3658: sub currentdump {
3659: my ($courseid,$sdom,$sname)=@_;
3660: $courseid = $env{'request.course.id'} if (! defined($courseid));
3661: $sdom = $env{'user.domain'} if (! defined($sdom));
3662: $sname = $env{'user.name'} if (! defined($sname));
3663: my $uhome = &homeserver($sname,$sdom);
3664: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
3665: return if ($rep =~ /^(error:|no_such_host)/);
3666: #
3667: my %returnhash=();
3668: #
3669: if ($rep eq "unknown_cmd") {
3670: # an old lond will not know currentdump
3671: # Do a dump and make it look like a currentdump
3672: my @tmp = &dumpstore($courseid,$sdom,$sname,'.');
3673: return if ($tmp[0] =~ /^(error:|no_such_host)/);
3674: my %hash = @tmp;
3675: @tmp=();
3676: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
3677: } else {
3678: my @pairs=split(/\&/,$rep);
3679: foreach my $pair (@pairs) {
3680: my ($key,$value)=split(/=/,$pair,2);
3681: my ($symb,$param) = split(/:/,$key);
3682: $returnhash{&unescape($symb)}->{&unescape($param)} =
3683: &thaw_unescape($value);
3684: }
3685: }
3686: return %returnhash;
3687: }
3688:
3689: sub convert_dump_to_currentdump{
3690: my %hash = %{shift()};
3691: my %returnhash;
3692: # Code ripped from lond, essentially. The only difference
3693: # here is the unescaping done by lonnet::dump(). Conceivably
3694: # we might run in to problems with parameter names =~ /^v\./
3695: while (my ($key,$value) = each(%hash)) {
3696: my ($v,$symb,$param) = split(/:/,$key);
3697: $symb = &unescape($symb);
3698: $param = &unescape($param);
3699: next if ($v eq 'version' || $symb eq 'keys');
3700: next if (exists($returnhash{$symb}) &&
3701: exists($returnhash{$symb}->{$param}) &&
3702: $returnhash{$symb}->{'v.'.$param} > $v);
3703: $returnhash{$symb}->{$param}=$value;
3704: $returnhash{$symb}->{'v.'.$param}=$v;
3705: }
3706: #
3707: # Remove all of the keys in the hashes which keep track of
3708: # the version of the parameter.
3709: while (my ($symb,$param_hash) = each(%returnhash)) {
3710: # use a foreach because we are going to delete from the hash.
3711: foreach my $key (keys(%$param_hash)) {
3712: delete($param_hash->{$key}) if ($key =~ /^v\./);
3713: }
3714: }
3715: return \%returnhash;
3716: }
3717:
3718: # ------------------------------------------------------ critical inc interface
3719:
3720: sub cinc {
3721: return &inc(@_,'critical');
3722: }
3723:
3724: # --------------------------------------------------------------- inc interface
3725:
3726: sub inc {
3727: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3728: if (!$udomain) { $udomain=$env{'user.domain'}; }
3729: if (!$uname) { $uname=$env{'user.name'}; }
3730: my $uhome=&homeserver($uname,$udomain);
3731: my $items='';
3732: if (! ref($store)) {
3733: # got a single value, so use that instead
3734: $items = &escape($store).'=&';
3735: } elsif (ref($store) eq 'SCALAR') {
3736: $items = &escape($$store).'=&';
3737: } elsif (ref($store) eq 'ARRAY') {
3738: $items = join('=&',map {&escape($_);} @{$store});
3739: } elsif (ref($store) eq 'HASH') {
3740: while (my($key,$value) = each(%{$store})) {
3741: $items.= &escape($key).'='.&escape($value).'&';
3742: }
3743: }
3744: $items=~s/\&$//;
3745: if ($critical) {
3746: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3747: } else {
3748: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3749: }
3750: }
3751:
3752: # --------------------------------------------------------------- put interface
3753:
3754: sub put {
3755: my ($namespace,$storehash,$udomain,$uname)=@_;
3756: if (!$udomain) { $udomain=$env{'user.domain'}; }
3757: if (!$uname) { $uname=$env{'user.name'}; }
3758: my $uhome=&homeserver($uname,$udomain);
3759: my $items='';
3760: foreach my $item (keys(%$storehash)) {
3761: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3762: }
3763: $items=~s/\&$//;
3764: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3765: }
3766:
3767: # ------------------------------------------------------------ newput interface
3768:
3769: sub newput {
3770: my ($namespace,$storehash,$udomain,$uname)=@_;
3771: if (!$udomain) { $udomain=$env{'user.domain'}; }
3772: if (!$uname) { $uname=$env{'user.name'}; }
3773: my $uhome=&homeserver($uname,$udomain);
3774: my $items='';
3775: foreach my $key (keys(%$storehash)) {
3776: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3777: }
3778: $items=~s/\&$//;
3779: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3780: }
3781:
3782: # --------------------------------------------------------- putstore interface
3783:
3784: sub putstore {
3785: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3786: if (!$udomain) { $udomain=$env{'user.domain'}; }
3787: if (!$uname) { $uname=$env{'user.name'}; }
3788: my $uhome=&homeserver($uname,$udomain);
3789: my $items='';
3790: foreach my $key (keys(%$storehash)) {
3791: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3792: }
3793: $items=~s/\&$//;
3794: my $esc_symb=&escape($symb);
3795: my $esc_v=&escape($version);
3796: my $reply =
3797: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3798: $uhome);
3799: if ($reply eq 'unknown_cmd') {
3800: # gfall back to way things use to be done
3801: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3802: $uname);
3803: }
3804: return $reply;
3805: }
3806:
3807: sub old_putstore {
3808: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3809: if (!$udomain) { $udomain=$env{'user.domain'}; }
3810: if (!$uname) { $uname=$env{'user.name'}; }
3811: my $uhome=&homeserver($uname,$udomain);
3812: my %newstorehash;
3813: foreach my $item (keys(%$storehash)) {
3814: my $key = $version.':'.&escape($symb).':'.$item;
3815: $newstorehash{$key} = $storehash->{$item};
3816: }
3817: my $items='';
3818: my %allitems = ();
3819: foreach my $item (keys(%newstorehash)) {
3820: if ($item =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3821: my $key = $1.':keys:'.$2;
3822: $allitems{$key} .= $3.':';
3823: }
3824: $items.=$item.'='.&freeze_escape($newstorehash{$item}).'&';
3825: }
3826: foreach my $item (keys(%allitems)) {
3827: $allitems{$item} =~ s/\:$//;
3828: $items.= $item.'='.$allitems{$item}.'&';
3829: }
3830: $items=~s/\&$//;
3831: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3832: }
3833:
3834: # ------------------------------------------------------ critical put interface
3835:
3836: sub cput {
3837: my ($namespace,$storehash,$udomain,$uname)=@_;
3838: if (!$udomain) { $udomain=$env{'user.domain'}; }
3839: if (!$uname) { $uname=$env{'user.name'}; }
3840: my $uhome=&homeserver($uname,$udomain);
3841: my $items='';
3842: foreach my $item (keys(%$storehash)) {
3843: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3844: }
3845: $items=~s/\&$//;
3846: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3847: }
3848:
3849: # -------------------------------------------------------------- eget interface
3850:
3851: sub eget {
3852: my ($namespace,$storearr,$udomain,$uname)=@_;
3853: my $items='';
3854: foreach my $item (@$storearr) {
3855: $items.=&escape($item).'&';
3856: }
3857: $items=~s/\&$//;
3858: if (!$udomain) { $udomain=$env{'user.domain'}; }
3859: if (!$uname) { $uname=$env{'user.name'}; }
3860: my $uhome=&homeserver($uname,$udomain);
3861: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3862: my @pairs=split(/\&/,$rep);
3863: my %returnhash=();
3864: my $i=0;
3865: foreach my $item (@$storearr) {
3866: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3867: $i++;
3868: }
3869: return %returnhash;
3870: }
3871:
3872: # ------------------------------------------------------------ tmpput interface
3873: sub tmpput {
3874: my ($storehash,$server,$context)=@_;
3875: my $items='';
3876: foreach my $item (keys(%$storehash)) {
3877: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3878: }
3879: $items=~s/\&$//;
3880: if (defined($context)) {
3881: $items .= ':'.&escape($context);
3882: }
3883: return &reply("tmpput:$items",$server);
3884: }
3885:
3886: # ------------------------------------------------------------ tmpget interface
3887: sub tmpget {
3888: my ($token,$server)=@_;
3889: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3890: my $rep=&reply("tmpget:$token",$server);
3891: my %returnhash;
3892: foreach my $item (split(/\&/,$rep)) {
3893: my ($key,$value)=split(/=/,$item);
3894: $returnhash{&unescape($key)}=&thaw_unescape($value);
3895: }
3896: return %returnhash;
3897: }
3898:
3899: # ------------------------------------------------------------ tmpget interface
3900: sub tmpdel {
3901: my ($token,$server)=@_;
3902: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3903: return &reply("tmpdel:$token",$server);
3904: }
3905:
3906: # -------------------------------------------------- portfolio access checking
3907:
3908: sub portfolio_access {
3909: my ($requrl) = @_;
3910: my (undef,$udom,$unum,$file_name,$group) = &parse_portfolio_url($requrl);
3911: my $result = &get_portfolio_access($udom,$unum,$file_name,$group);
3912: if ($result) {
3913: my %setters;
3914: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3915: my ($startblock,$endblock) =
3916: &Apache::loncommon::blockcheck(\%setters,'port',$unum,$udom);
3917: if ($startblock && $endblock) {
3918: return 'B';
3919: }
3920: } else {
3921: my ($startblock,$endblock) =
3922: &Apache::loncommon::blockcheck(\%setters,'port');
3923: if ($startblock && $endblock) {
3924: return 'B';
3925: }
3926: }
3927: }
3928: if ($result eq 'ok') {
3929: return 'F';
3930: } elsif ($result =~ /^[^:]+:guest_/) {
3931: return 'A';
3932: }
3933: return '';
3934: }
3935:
3936: sub get_portfolio_access {
3937: my ($udom,$unum,$file_name,$group,$access_hash) = @_;
3938:
3939: if (!ref($access_hash)) {
3940: my $current_perms = &get_portfile_permissions($udom,$unum);
3941: my %access_controls = &get_access_controls($current_perms,$group,
3942: $file_name);
3943: $access_hash = $access_controls{$file_name};
3944: }
3945:
3946: my ($public,$guest,@domains,@users,@courses,@groups);
3947: my $now = time;
3948: if (ref($access_hash) eq 'HASH') {
3949: foreach my $key (keys(%{$access_hash})) {
3950: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
3951: if ($start > $now) {
3952: next;
3953: }
3954: if ($end && $end<$now) {
3955: next;
3956: }
3957: if ($scope eq 'public') {
3958: $public = $key;
3959: last;
3960: } elsif ($scope eq 'guest') {
3961: $guest = $key;
3962: } elsif ($scope eq 'domains') {
3963: push(@domains,$key);
3964: } elsif ($scope eq 'users') {
3965: push(@users,$key);
3966: } elsif ($scope eq 'course') {
3967: push(@courses,$key);
3968: } elsif ($scope eq 'group') {
3969: push(@groups,$key);
3970: }
3971: }
3972: if ($public) {
3973: return 'ok';
3974: }
3975: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3976: if ($guest) {
3977: return $guest;
3978: }
3979: } else {
3980: if (@domains > 0) {
3981: foreach my $domkey (@domains) {
3982: if (ref($access_hash->{$domkey}{'dom'}) eq 'ARRAY') {
3983: if (grep(/^\Q$env{'user.domain'}\E$/,@{$access_hash->{$domkey}{'dom'}})) {
3984: return 'ok';
3985: }
3986: }
3987: }
3988: }
3989: if (@users > 0) {
3990: foreach my $userkey (@users) {
3991: if (ref($access_hash->{$userkey}{'users'}) eq 'ARRAY') {
3992: foreach my $item (@{$access_hash->{$userkey}{'users'}}) {
3993: if (ref($item) eq 'HASH') {
3994: if (($item->{'uname'} eq $env{'user.name'}) &&
3995: ($item->{'udom'} eq $env{'user.domain'})) {
3996: return 'ok';
3997: }
3998: }
3999: }
4000: }
4001: }
4002: }
4003: my %roleshash;
4004: my @courses_and_groups = @courses;
4005: push(@courses_and_groups,@groups);
4006: if (@courses_and_groups > 0) {
4007: my (%allgroups,%allroles);
4008: my ($start,$end,$role,$sec,$group);
4009: foreach my $envkey (%env) {
4010: if ($envkey =~ m-^user\.role\.(gr|cc|in|ta|ep|st)\./($match_domain)/($match_courseid)/?([^/]*)$-) {
4011: my $cid = $2.'_'.$3;
4012: if ($1 eq 'gr') {
4013: $group = $4;
4014: $allgroups{$cid}{$group} = $env{$envkey};
4015: } else {
4016: if ($4 eq '') {
4017: $sec = 'none';
4018: } else {
4019: $sec = $4;
4020: }
4021: $allroles{$cid}{$1}{$sec} = $env{$envkey};
4022: }
4023: } elsif ($envkey =~ m-^user\.role\./cr/($match_domain/$match_username/\w*)./($match_domain)/($match_courseid)/?([^/]*)$-) {
4024: my $cid = $2.'_'.$3;
4025: if ($4 eq '') {
4026: $sec = 'none';
4027: } else {
4028: $sec = $4;
4029: }
4030: $allroles{$cid}{$1}{$sec} = $env{$envkey};
4031: }
4032: }
4033: if (keys(%allroles) == 0) {
4034: return;
4035: }
4036: foreach my $key (@courses_and_groups) {
4037: my %content = %{$$access_hash{$key}};
4038: my $cnum = $content{'number'};
4039: my $cdom = $content{'domain'};
4040: my $cid = $cdom.'_'.$cnum;
4041: if (!exists($allroles{$cid})) {
4042: next;
4043: }
4044: foreach my $role_id (keys(%{$content{'roles'}})) {
4045: my @sections = @{$content{'roles'}{$role_id}{'section'}};
4046: my @groups = @{$content{'roles'}{$role_id}{'group'}};
4047: my @status = @{$content{'roles'}{$role_id}{'access'}};
4048: my @roles = @{$content{'roles'}{$role_id}{'role'}};
4049: foreach my $role (keys(%{$allroles{$cid}})) {
4050: if ((grep/^all$/,@roles) || (grep/^\Q$role\E$/,@roles)) {
4051: foreach my $sec (keys(%{$allroles{$cid}{$role}})) {
4052: if (&course_group_datechecker($allroles{$cid}{$role}{$sec},$now,\@status) eq 'ok') {
4053: if (grep/^all$/,@sections) {
4054: return 'ok';
4055: } else {
4056: if (grep/^$sec$/,@sections) {
4057: return 'ok';
4058: }
4059: }
4060: }
4061: }
4062: if (keys(%{$allgroups{$cid}}) == 0) {
4063: if (grep/^none$/,@groups) {
4064: return 'ok';
4065: }
4066: } else {
4067: if (grep/^all$/,@groups) {
4068: return 'ok';
4069: }
4070: foreach my $group (keys(%{$allgroups{$cid}})) {
4071: if (grep/^$group$/,@groups) {
4072: return 'ok';
4073: }
4074: }
4075: }
4076: }
4077: }
4078: }
4079: }
4080: }
4081: if ($guest) {
4082: return $guest;
4083: }
4084: }
4085: }
4086: return;
4087: }
4088:
4089: sub course_group_datechecker {
4090: my ($dates,$now,$status) = @_;
4091: my ($start,$end) = split(/\./,$dates);
4092: if (!$start && !$end) {
4093: return 'ok';
4094: }
4095: if (grep/^active$/,@{$status}) {
4096: if (((!$start) || ($start && $start <= $now)) && ((!$end) || ($end && $end >= $now))) {
4097: return 'ok';
4098: }
4099: }
4100: if (grep/^previous$/,@{$status}) {
4101: if ($end > $now ) {
4102: return 'ok';
4103: }
4104: }
4105: if (grep/^future$/,@{$status}) {
4106: if ($start > $now) {
4107: return 'ok';
4108: }
4109: }
4110: return;
4111: }
4112:
4113: sub parse_portfolio_url {
4114: my ($url) = @_;
4115:
4116: my ($type,$udom,$unum,$group,$file_name);
4117:
4118: if ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_username)/portfolio(/.+)$-) {
4119: $type = 1;
4120: $udom = $1;
4121: $unum = $2;
4122: $file_name = $3;
4123: } elsif ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_courseid)/groups/([^/]+)/portfolio/(.+)$-) {
4124: $type = 2;
4125: $udom = $1;
4126: $unum = $2;
4127: $group = $3;
4128: $file_name = $3.'/'.$4;
4129: }
4130: if (wantarray) {
4131: return ($type,$udom,$unum,$file_name,$group);
4132: }
4133: return $type;
4134: }
4135:
4136: sub is_portfolio_url {
4137: my ($url) = @_;
4138: return scalar(&parse_portfolio_url($url));
4139: }
4140:
4141: sub is_portfolio_file {
4142: my ($file) = @_;
4143: if (($file =~ /^portfolio/) || ($file =~ /^groups\/\w+\/portfolio/)) {
4144: return 1;
4145: }
4146: return;
4147: }
4148:
4149:
4150: # ---------------------------------------------- Custom access rule evaluation
4151:
4152: sub customaccess {
4153: my ($priv,$uri)=@_;
4154: my ($urole,$urealm)=split(/\./,$env{'request.role'},2);
4155: my (undef,$udom,$ucrs,$usec)=split(/\//,$urealm);
4156: $udom = &LONCAPA::clean_domain($udom);
4157: $ucrs = &LONCAPA::clean_username($ucrs);
4158: my $access=0;
4159: foreach my $right (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
4160: my ($effect,$realm,$role,$type)=split(/\:/,$right);
4161: if ($type eq 'user') {
4162: foreach my $scope (split(/\s*\,\s*/,$realm)) {
4163: my ($tdom,$tuname)=split(m{/},$scope);
4164: if ($tdom) {
4165: if ($tdom ne $env{'user.domain'}) { next; }
4166: }
4167: if ($tuname) {
4168: if ($tuname ne $env{'user.name'}) { next; }
4169: }
4170: $access=($effect eq 'allow');
4171: last;
4172: }
4173: } else {
4174: if ($role) {
4175: if ($role ne $urole) { next; }
4176: }
4177: foreach my $scope (split(/\s*\,\s*/,$realm)) {
4178: my ($tdom,$tcrs,$tsec)=split(/\_/,$scope);
4179: if ($tdom) {
4180: if ($tdom ne $udom) { next; }
4181: }
4182: if ($tcrs) {
4183: if ($tcrs ne $ucrs) { next; }
4184: }
4185: if ($tsec) {
4186: if ($tsec ne $usec) { next; }
4187: }
4188: $access=($effect eq 'allow');
4189: last;
4190: }
4191: if ($realm eq '' && $role eq '') {
4192: $access=($effect eq 'allow');
4193: }
4194: }
4195: }
4196: return $access;
4197: }
4198:
4199: # ------------------------------------------------- Check for a user privilege
4200:
4201: sub allowed {
4202: my ($priv,$uri,$symb,$role)=@_;
4203: my $ver_orguri=$uri;
4204: $uri=&deversion($uri);
4205: my $orguri=$uri;
4206: $uri=&declutter($uri);
4207:
4208: if ($priv eq 'evb') {
4209: # Evade communication block restrictions for specified role in a course
4210: if ($env{'user.priv.'.$role} =~/evb\&([^\:]*)/) {
4211: return $1;
4212: } else {
4213: return;
4214: }
4215: }
4216:
4217: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
4218: # Free bre access to adm and meta resources
4219: if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard)$}))
4220: || (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) ))
4221: && ($priv eq 'bre')) {
4222: return 'F';
4223: }
4224:
4225: # Free bre access to user's own portfolio contents
4226: my ($space,$domain,$name,@dir)=split('/',$uri);
4227: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
4228: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
4229: my %setters;
4230: my ($startblock,$endblock) =
4231: &Apache::loncommon::blockcheck(\%setters,'port');
4232: if ($startblock && $endblock) {
4233: return 'B';
4234: } else {
4235: return 'F';
4236: }
4237: }
4238:
4239: # bre access to group portfolio for rgf priv in group, or mdg or vcg in course.
4240: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
4241: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
4242: if (exists($env{'request.course.id'})) {
4243: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
4244: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
4245: if (($domain eq $cdom) && ($name eq $cnum)) {
4246: my $courseprivid=$env{'request.course.id'};
4247: $courseprivid=~s/\_/\//;
4248: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
4249: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
4250: return $1;
4251: } else {
4252: if ($env{'request.course.sec'}) {
4253: $courseprivid.='/'.$env{'request.course.sec'};
4254: }
4255: if ($env{'user.priv.'.$env{'request.role'}.'./'.
4256: $courseprivid} =~/(mdg|vcg)\&([^\:]*)/) {
4257: return $2;
4258: }
4259: }
4260: }
4261: }
4262: }
4263:
4264: # Free bre to public access
4265:
4266: if ($priv eq 'bre') {
4267: my $copyright=&metadata($uri,'copyright');
4268: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
4269: return 'F';
4270: }
4271: if ($copyright eq 'priv') {
4272: $uri=~/([^\/]+)\/([^\/]+)\//;
4273: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
4274: return '';
4275: }
4276: }
4277: if ($copyright eq 'domain') {
4278: $uri=~/([^\/]+)\/([^\/]+)\//;
4279: unless (($env{'user.domain'} eq $1) ||
4280: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
4281: return '';
4282: }
4283: }
4284: if ($env{'request.role'}=~ /li\.\//) {
4285: # Library role, so allow browsing of resources in this domain.
4286: return 'F';
4287: }
4288: if ($copyright eq 'custom') {
4289: unless (&customaccess($priv,$uri)) { return ''; }
4290: }
4291: }
4292: # Domain coordinator is trying to create a course
4293: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
4294: # uri is the requested domain in this case.
4295: # comparison to 'request.role.domain' shows if the user has selected
4296: # a role of dc for the domain in question.
4297: return 'F' if ($uri eq $env{'request.role.domain'});
4298: }
4299:
4300: my $thisallowed='';
4301: my $statecond=0;
4302: my $courseprivid='';
4303:
4304: # Course
4305:
4306: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
4307: $thisallowed.=$1;
4308: }
4309:
4310: # Domain
4311:
4312: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
4313: =~/\Q$priv\E\&([^\:]*)/) {
4314: $thisallowed.=$1;
4315: }
4316:
4317: # Course: uri itself is a course
4318: my $courseuri=$uri;
4319: $courseuri=~s/\_(\d)/\/$1/;
4320: $courseuri=~s/^([^\/])/\/$1/;
4321:
4322: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
4323: =~/\Q$priv\E\&([^\:]*)/) {
4324: $thisallowed.=$1;
4325: }
4326:
4327: # URI is an uploaded document for this course, default permissions don't matter
4328: # not allowing 'edit' access (editupload) to uploaded course docs
4329: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
4330: $thisallowed='';
4331: my ($match)=&is_on_map($uri);
4332: if ($match) {
4333: if ($env{'user.priv.'.$env{'request.role'}.'./'}
4334: =~/\Q$priv\E\&([^\:]*)/) {
4335: $thisallowed.=$1;
4336: }
4337: } else {
4338: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
4339: if ($refuri) {
4340: if ($refuri =~ m|^/adm/|) {
4341: $thisallowed='F';
4342: } else {
4343: $refuri=&declutter($refuri);
4344: my ($match) = &is_on_map($refuri);
4345: if ($match) {
4346: $thisallowed='F';
4347: }
4348: }
4349: }
4350: }
4351: }
4352:
4353: if ($priv eq 'bre'
4354: && $thisallowed ne 'F'
4355: && $thisallowed ne '2'
4356: && &is_portfolio_url($uri)) {
4357: $thisallowed = &portfolio_access($uri);
4358: }
4359:
4360: # Full access at system, domain or course-wide level? Exit.
4361:
4362: if ($thisallowed=~/F/) {
4363: return 'F';
4364: }
4365:
4366: # If this is generating or modifying users, exit with special codes
4367:
4368: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
4369: if (($priv eq 'cca') || ($priv eq 'caa')) {
4370: my ($audom,$auname)=split('/',$uri);
4371: # no author name given, so this just checks on the general right to make a co-author in this domain
4372: unless ($auname) { return $thisallowed; }
4373: # an author name is given, so we are about to actually make a co-author for a certain account
4374: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
4375: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
4376: ($audom ne $env{'request.role.domain'}))) { return ''; }
4377: }
4378: return $thisallowed;
4379: }
4380: #
4381: # Gathered so far: system, domain and course wide privileges
4382: #
4383: # Course: See if uri or referer is an individual resource that is part of
4384: # the course
4385:
4386: if ($env{'request.course.id'}) {
4387:
4388: $courseprivid=$env{'request.course.id'};
4389: if ($env{'request.course.sec'}) {
4390: $courseprivid.='/'.$env{'request.course.sec'};
4391: }
4392: $courseprivid=~s/\_/\//;
4393: my $checkreferer=1;
4394: my ($match,$cond)=&is_on_map($uri);
4395: if ($match) {
4396: $statecond=$cond;
4397: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
4398: =~/\Q$priv\E\&([^\:]*)/) {
4399: $thisallowed.=$1;
4400: $checkreferer=0;
4401: }
4402: }
4403:
4404: if ($checkreferer) {
4405: my $refuri=$env{'httpref.'.$orguri};
4406: unless ($refuri) {
4407: foreach my $key (keys(%env)) {
4408: if ($key=~/^httpref\..*\*/) {
4409: my $pattern=$key;
4410: $pattern=~s/^httpref\.\/res\///;
4411: $pattern=~s/\*/\[\^\/\]\+/g;
4412: $pattern=~s/\//\\\//g;
4413: if ($orguri=~/$pattern/) {
4414: $refuri=$env{$key};
4415: }
4416: }
4417: }
4418: }
4419:
4420: if ($refuri) {
4421: $refuri=&declutter($refuri);
4422: my ($match,$cond)=&is_on_map($refuri);
4423: if ($match) {
4424: my $refstatecond=$cond;
4425: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
4426: =~/\Q$priv\E\&([^\:]*)/) {
4427: $thisallowed.=$1;
4428: $uri=$refuri;
4429: $statecond=$refstatecond;
4430: }
4431: }
4432: }
4433: }
4434: }
4435:
4436: #
4437: # Gathered now: all privileges that could apply, and condition number
4438: #
4439: #
4440: # Full or no access?
4441: #
4442:
4443: if ($thisallowed=~/F/) {
4444: return 'F';
4445: }
4446:
4447: unless ($thisallowed) {
4448: return '';
4449: }
4450:
4451: # Restrictions exist, deal with them
4452: #
4453: # C:according to course preferences
4454: # R:according to resource settings
4455: # L:unless locked
4456: # X:according to user session state
4457: #
4458:
4459: # Possibly locked functionality, check all courses
4460: # Locks might take effect only after 10 minutes cache expiration for other
4461: # courses, and 2 minutes for current course
4462:
4463: my $envkey;
4464: if ($thisallowed=~/L/) {
4465: foreach $envkey (keys %env) {
4466: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
4467: my $courseid=$2;
4468: my $roleid=$1.'.'.$2;
4469: $courseid=~s/^\///;
4470: my $expiretime=600;
4471: if ($env{'request.role'} eq $roleid) {
4472: $expiretime=120;
4473: }
4474: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
4475: my $prefix='course.'.$cdom.'_'.$cnum.'.';
4476: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
4477: &coursedescription($courseid,{'freshen_cache' => 1});
4478: }
4479: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
4480: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
4481: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
4482: &log($env{'user.domain'},$env{'user.name'},
4483: $env{'user.home'},
4484: 'Locked by res: '.$priv.' for '.$uri.' due to '.
4485: $cdom.'/'.$cnum.'/'.$csec.' expire '.
4486: $env{$prefix.'priv.'.$priv.'.lock.expire'});
4487: return '';
4488: }
4489: }
4490: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
4491: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
4492: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
4493: &log($env{'user.domain'},$env{'user.name'},
4494: $env{'user.home'},
4495: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
4496: $cdom.'/'.$cnum.'/'.$csec.' expire '.
4497: $env{$prefix.'priv.'.$priv.'.lock.expire'});
4498: return '';
4499: }
4500: }
4501: }
4502: }
4503: }
4504:
4505: #
4506: # Rest of the restrictions depend on selected course
4507: #
4508:
4509: unless ($env{'request.course.id'}) {
4510: if ($thisallowed eq 'A') {
4511: return 'A';
4512: } elsif ($thisallowed eq 'B') {
4513: return 'B';
4514: } else {
4515: return '1';
4516: }
4517: }
4518:
4519: #
4520: # Now user is definitely in a course
4521: #
4522:
4523:
4524: # Course preferences
4525:
4526: if ($thisallowed=~/C/) {
4527: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4528: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
4529: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
4530: =~/\Q$rolecode\E/) {
4531: if ($priv ne 'pch') {
4532: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4533: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
4534: $env{'request.course.id'});
4535: }
4536: return '';
4537: }
4538:
4539: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
4540: =~/\Q$unamedom\E/) {
4541: if ($priv ne 'pch') {
4542: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
4543: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
4544: $env{'request.course.id'});
4545: }
4546: return '';
4547: }
4548: }
4549:
4550: # Resource preferences
4551:
4552: if ($thisallowed=~/R/) {
4553: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4554: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
4555: if ($priv ne 'pch') {
4556: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4557: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
4558: }
4559: return '';
4560: }
4561: }
4562:
4563: # Restricted by state or randomout?
4564:
4565: if ($thisallowed=~/X/) {
4566: if ($env{'acc.randomout'}) {
4567: if (!$symb) { $symb=&symbread($uri,1); }
4568: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
4569: return '';
4570: }
4571: }
4572: if (&condval($statecond)) {
4573: return '2';
4574: } else {
4575: return '';
4576: }
4577: }
4578:
4579: if ($thisallowed eq 'A') {
4580: return 'A';
4581: } elsif ($thisallowed eq 'B') {
4582: return 'B';
4583: }
4584: return 'F';
4585: }
4586:
4587: sub split_uri_for_cond {
4588: my $uri=&deversion(&declutter(shift));
4589: my @uriparts=split(/\//,$uri);
4590: my $filename=pop(@uriparts);
4591: my $pathname=join('/',@uriparts);
4592: return ($pathname,$filename);
4593: }
4594: # --------------------------------------------------- Is a resource on the map?
4595:
4596: sub is_on_map {
4597: my ($pathname,$filename) = &split_uri_for_cond(shift);
4598: #Trying to find the conditional for the file
4599: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4600: /\&\Q$filename\E\:([\d\|]+)\&/);
4601: if ($match) {
4602: return (1,$1);
4603: } else {
4604: return (0,0);
4605: }
4606: }
4607:
4608: # --------------------------------------------------------- Get symb from alias
4609:
4610: sub get_symb_from_alias {
4611: my $symb=shift;
4612: my ($map,$resid,$url)=&decode_symb($symb);
4613: # Already is a symb
4614: if ($url) { return $symb; }
4615: # Must be an alias
4616: my $aliassymb='';
4617: my %bighash;
4618: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4619: &GDBM_READER(),0640)) {
4620: my $rid=$bighash{'mapalias_'.$symb};
4621: if ($rid) {
4622: my ($mapid,$resid)=split(/\./,$rid);
4623: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
4624: $resid,$bighash{'src_'.$rid});
4625: }
4626: untie %bighash;
4627: }
4628: return $aliassymb;
4629: }
4630:
4631: # ----------------------------------------------------------------- Define Role
4632:
4633: sub definerole {
4634: if (allowed('mcr','/')) {
4635: my ($rolename,$sysrole,$domrole,$courole)=@_;
4636: foreach my $role (split(':',$sysrole)) {
4637: my ($crole,$cqual)=split(/\&/,$role);
4638: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
4639: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
4640: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4641: return "refused:s:$crole&$cqual";
4642: }
4643: }
4644: }
4645: foreach my $role (split(':',$domrole)) {
4646: my ($crole,$cqual)=split(/\&/,$role);
4647: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
4648: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
4649: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
4650: return "refused:d:$crole&$cqual";
4651: }
4652: }
4653: }
4654: foreach my $role (split(':',$courole)) {
4655: my ($crole,$cqual)=split(/\&/,$role);
4656: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
4657: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
4658: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4659: return "refused:c:$crole&$cqual";
4660: }
4661: }
4662: }
4663: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4664: "$env{'user.domain'}:$env{'user.name'}:".
4665: "rolesdef_$rolename=".
4666: escape($sysrole.'_'.$domrole.'_'.$courole);
4667: return reply($command,$env{'user.home'});
4668: } else {
4669: return 'refused';
4670: }
4671: }
4672:
4673: # ---------------- Make a metadata query against the network of library servers
4674:
4675: sub metadata_query {
4676: my ($query,$custom,$customshow,$server_array)=@_;
4677: my %rhash;
4678: my %libserv = &all_library();
4679: my @server_list = (defined($server_array) ? @$server_array
4680: : keys(%libserv) );
4681: for my $server (@server_list) {
4682: unless ($custom or $customshow) {
4683: my $reply=&reply("querysend:".&escape($query),$server);
4684: $rhash{$server}=$reply;
4685: }
4686: else {
4687: my $reply=&reply("querysend:".&escape($query).':'.
4688: &escape($custom).':'.&escape($customshow),
4689: $server);
4690: $rhash{$server}=$reply;
4691: }
4692: }
4693: return \%rhash;
4694: }
4695:
4696: # ----------------------------------------- Send log queries and wait for reply
4697:
4698: sub log_query {
4699: my ($uname,$udom,$query,%filters)=@_;
4700: my $uhome=&homeserver($uname,$udom);
4701: if ($uhome eq 'no_host') { return 'error: no_host'; }
4702: my $uhost=&hostname($uhome);
4703: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys(%filters)));
4704: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
4705: $uhome);
4706: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
4707: return get_query_reply($queryid);
4708: }
4709:
4710: # -------------------------- Update MySQL table for portfolio file
4711:
4712: sub update_portfolio_table {
4713: my ($uname,$udom,$file_name,$query,$group,$action) = @_;
4714: my $homeserver = &homeserver($uname,$udom);
4715: my $queryid=
4716: &reply("querysend:".$query.':'.&escape($uname.':'.$udom.':'.$group).
4717: ':'.&escape($file_name).':'.$action,$homeserver);
4718: my $reply = &get_query_reply($queryid);
4719: return $reply;
4720: }
4721:
4722: # -------------------------- Update MySQL allusers table
4723:
4724: sub update_allusers_table {
4725: my ($uname,$udom,$names) = @_;
4726: my $homeserver = &homeserver($uname,$udom);
4727: my $queryid=
4728: &reply('querysend:allusers:'.&escape($uname).':'.&escape($udom).':'.
4729: 'lastname='.&escape($names->{'lastname'}).'%%'.
4730: 'firstname='.&escape($names->{'firstname'}).'%%'.
4731: 'middlename='.&escape($names->{'middlename'}).'%%'.
4732: 'generation='.&escape($names->{'generation'}).'%%'.
4733: 'permanentemail='.&escape($names->{'permanentemail'}).'%%'.
4734: 'id='.&escape($names->{'id'}),$homeserver);
4735: my $reply = &get_query_reply($queryid);
4736: return $reply;
4737: }
4738:
4739: # ------- Request retrieval of institutional classlists for course(s)
4740:
4741: sub fetch_enrollment_query {
4742: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
4743: my $homeserver;
4744: my $maxtries = 1;
4745: if ($context eq 'automated') {
4746: $homeserver = $perlvar{'lonHostID'};
4747: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
4748: } else {
4749: $homeserver = &homeserver($cnum,$dom);
4750: }
4751: my $host=&hostname($homeserver);
4752: my $cmd = '';
4753: foreach my $affiliate (keys %{$affiliatesref}) {
4754: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4755: }
4756: $cmd =~ s/%%$//;
4757: $cmd = &escape($cmd);
4758: my $query = 'fetchenrollment';
4759: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
4760: unless ($queryid=~/^\Q$host\E\_/) {
4761: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
4762: return 'error: '.$queryid;
4763: }
4764: my $reply = &get_query_reply($queryid);
4765: my $tries = 1;
4766: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4767: $reply = &get_query_reply($queryid);
4768: $tries ++;
4769: }
4770: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4771: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4772: } else {
4773: my @responses = split(/:/,$reply);
4774: if ($homeserver eq $perlvar{'lonHostID'}) {
4775: foreach my $line (@responses) {
4776: my ($key,$value) = split(/=/,$line,2);
4777: $$replyref{$key} = $value;
4778: }
4779: } else {
4780: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
4781: foreach my $line (@responses) {
4782: my ($key,$value) = split(/=/,$line);
4783: $$replyref{$key} = $value;
4784: if ($value > 0) {
4785: foreach my $item (@{$$affiliatesref{$key}}) {
4786: my $filename = $dom.'_'.$key.'_'.$item.'_classlist.xml';
4787: my $destname = $pathname.'/'.$filename;
4788: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
4789: if ($xml_classlist =~ /^error/) {
4790: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
4791: } else {
4792: if ( open(FILE,">$destname") ) {
4793: print FILE &unescape($xml_classlist);
4794: close(FILE);
4795: } else {
4796: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
4797: }
4798: }
4799: }
4800: }
4801: }
4802: }
4803: return 'ok';
4804: }
4805: return 'error';
4806: }
4807:
4808: sub get_query_reply {
4809: my $queryid=shift;
4810: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
4811: my $reply='';
4812: for (1..100) {
4813: sleep 2;
4814: if (-e $replyfile.'.end') {
4815: if (open(my $fh,$replyfile)) {
4816: $reply = join('',<$fh>);
4817: close($fh);
4818: } else { return 'error: reply_file_error'; }
4819: return &unescape($reply);
4820: }
4821: }
4822: return 'timeout:'.$queryid;
4823: }
4824:
4825: sub courselog_query {
4826: #
4827: # possible filters:
4828: # url: url or symb
4829: # username
4830: # domain
4831: # action: view, submit, grade
4832: # start: timestamp
4833: # end: timestamp
4834: #
4835: my (%filters)=@_;
4836: unless ($env{'request.course.id'}) { return 'no_course'; }
4837: if ($filters{'url'}) {
4838: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
4839: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
4840: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
4841: }
4842: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
4843: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
4844: return &log_query($cname,$cdom,'courselog',%filters);
4845: }
4846:
4847: sub userlog_query {
4848: #
4849: # possible filters:
4850: # action: log check role
4851: # start: timestamp
4852: # end: timestamp
4853: #
4854: my ($uname,$udom,%filters)=@_;
4855: return &log_query($uname,$udom,'userlog',%filters);
4856: }
4857:
4858: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
4859:
4860: sub auto_run {
4861: my ($cnum,$cdom) = @_;
4862: my $response = 0;
4863: my $settings;
4864: my %domconfig = &get_dom('configuration',['autoenroll'],$cdom);
4865: if (ref($domconfig{'autoenroll'}) eq 'HASH') {
4866: $settings = $domconfig{'autoenroll'};
4867: if ($settings->{'run'} eq '1') {
4868: $response = 1;
4869: }
4870: } else {
4871: my $homeserver;
4872: if (&is_course($cdom,$cnum)) {
4873: $homeserver = &homeserver($cnum,$cdom);
4874: } else {
4875: $homeserver = &domain($cdom,'primary');
4876: }
4877: if ($homeserver ne 'no_host') {
4878: $response = &reply('autorun:'.$cdom,$homeserver);
4879: }
4880: }
4881: return $response;
4882: }
4883:
4884: sub auto_get_sections {
4885: my ($cnum,$cdom,$inst_coursecode) = @_;
4886: my $homeserver = &homeserver($cnum,$cdom);
4887: my @secs = ();
4888: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
4889: unless ($response eq 'refused') {
4890: @secs = split(/:/,$response);
4891: }
4892: return @secs;
4893: }
4894:
4895: sub auto_new_course {
4896: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
4897: my $homeserver = &homeserver($cnum,$cdom);
4898: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
4899: return $response;
4900: }
4901:
4902: sub auto_validate_courseID {
4903: my ($cnum,$cdom,$inst_course_id) = @_;
4904: my $homeserver = &homeserver($cnum,$cdom);
4905: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
4906: return $response;
4907: }
4908:
4909: sub auto_create_password {
4910: my ($cnum,$cdom,$authparam,$udom) = @_;
4911: my ($homeserver,$response);
4912: my $create_passwd = 0;
4913: my $authchk = '';
4914: if ($udom =~ /^$match_domain$/) {
4915: $homeserver = &domain($udom,'primary');
4916: }
4917: if ($homeserver eq '') {
4918: if (($cdom =~ /^$match_domain$/) && ($cnum =~ /^$match_courseid$/)) {
4919: $homeserver = &homeserver($cnum,$cdom);
4920: }
4921: }
4922: if ($homeserver eq '') {
4923: $authchk = 'nodomain';
4924: } else {
4925: $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
4926: if ($response eq 'refused') {
4927: $authchk = 'refused';
4928: } else {
4929: ($authparam,$create_passwd,$authchk) = split(/:/,$response);
4930: }
4931: }
4932: return ($authparam,$create_passwd,$authchk);
4933: }
4934:
4935: sub auto_photo_permission {
4936: my ($cnum,$cdom,$students) = @_;
4937: my $homeserver = &homeserver($cnum,$cdom);
4938: my ($outcome,$perm_reqd,$conditions) =
4939: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
4940: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4941: return (undef,undef);
4942: }
4943: return ($outcome,$perm_reqd,$conditions);
4944: }
4945:
4946: sub auto_checkphotos {
4947: my ($uname,$udom,$pid) = @_;
4948: my $homeserver = &homeserver($uname,$udom);
4949: my ($result,$resulttype);
4950: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
4951: &escape($uname).':'.&escape($pid),
4952: $homeserver));
4953: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4954: return (undef,undef);
4955: }
4956: if ($outcome) {
4957: ($result,$resulttype) = split(/:/,$outcome);
4958: }
4959: return ($result,$resulttype);
4960: }
4961:
4962: sub auto_photochoice {
4963: my ($cnum,$cdom) = @_;
4964: my $homeserver = &homeserver($cnum,$cdom);
4965: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
4966: &escape($cdom),
4967: $homeserver)));
4968: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4969: return (undef,undef);
4970: }
4971: return ($update,$comment);
4972: }
4973:
4974: sub auto_photoupdate {
4975: my ($affiliatesref,$dom,$cnum,$photo) = @_;
4976: my $homeserver = &homeserver($cnum,$dom);
4977: my $host=&hostname($homeserver);
4978: my $cmd = '';
4979: my $maxtries = 1;
4980: foreach my $affiliate (keys(%{$affiliatesref})) {
4981: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4982: }
4983: $cmd =~ s/%%$//;
4984: $cmd = &escape($cmd);
4985: my $query = 'institutionalphotos';
4986: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
4987: unless ($queryid=~/^\Q$host\E\_/) {
4988: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
4989: return 'error: '.$queryid;
4990: }
4991: my $reply = &get_query_reply($queryid);
4992: my $tries = 1;
4993: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4994: $reply = &get_query_reply($queryid);
4995: $tries ++;
4996: }
4997: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4998: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4999: } else {
5000: my @responses = split(/:/,$reply);
5001: my $outcome = shift(@responses);
5002: foreach my $item (@responses) {
5003: my ($key,$value) = split(/=/,$item);
5004: $$photo{$key} = $value;
5005: }
5006: return $outcome;
5007: }
5008: return 'error';
5009: }
5010:
5011: sub auto_instcode_format {
5012: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,
5013: $cat_order) = @_;
5014: my $courses = '';
5015: my @homeservers;
5016: if ($caller eq 'global') {
5017: my %servers = &get_servers($codedom,'library');
5018: foreach my $tryserver (keys(%servers)) {
5019: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
5020: push(@homeservers,$tryserver);
5021: }
5022: }
5023: } else {
5024: push(@homeservers,&homeserver($caller,$codedom));
5025: }
5026: foreach my $code (keys(%{$instcodes})) {
5027: $courses .= &escape($code).'='.&escape($$instcodes{$code}).'&';
5028: }
5029: chop($courses);
5030: my $ok_response = 0;
5031: my $response;
5032: while (@homeservers > 0 && $ok_response == 0) {
5033: my $server = shift(@homeservers);
5034: $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$server);
5035: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
5036: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) =
5037: split(/:/,$response);
5038: %{$codes} = (%{$codes},&str2hash($codes_str));
5039: push(@{$codetitles},&str2array($codetitles_str));
5040: %{$cat_titles} = (%{$cat_titles},&str2hash($cat_titles_str));
5041: %{$cat_order} = (%{$cat_order},&str2hash($cat_order_str));
5042: $ok_response = 1;
5043: }
5044: }
5045: if ($ok_response) {
5046: return 'ok';
5047: } else {
5048: return $response;
5049: }
5050: }
5051:
5052: sub auto_instcode_defaults {
5053: my ($domain,$returnhash,$code_order) = @_;
5054: my @homeservers;
5055:
5056: my %servers = &get_servers($domain,'library');
5057: foreach my $tryserver (keys(%servers)) {
5058: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
5059: push(@homeservers,$tryserver);
5060: }
5061: }
5062:
5063: my $response;
5064: foreach my $server (@homeservers) {
5065: $response=&reply('autoinstcodedefaults:'.$domain,$server);
5066: next if ($response =~ /(con_lost|error|no_such_host|refused)/);
5067:
5068: foreach my $pair (split(/\&/,$response)) {
5069: my ($name,$value)=split(/\=/,$pair);
5070: if ($name eq 'code_order') {
5071: @{$code_order} = split(/\&/,&unescape($value));
5072: } else {
5073: $returnhash->{&unescape($name)}=&unescape($value);
5074: }
5075: }
5076: return 'ok';
5077: }
5078:
5079: return $response;
5080: }
5081:
5082: sub auto_validate_class_sec {
5083: my ($cdom,$cnum,$owners,$inst_class) = @_;
5084: my $homeserver = &homeserver($cnum,$cdom);
5085: my $ownerlist;
5086: if (ref($owners) eq 'ARRAY') {
5087: $ownerlist = join(',',@{$owners});
5088: } else {
5089: $ownerlist = $owners;
5090: }
5091: my $response=&reply('autovalidateclass_sec:'.$inst_class.':'.
5092: &escape($ownerlist).':'.$cdom,$homeserver);
5093: return $response;
5094: }
5095:
5096: # ------------------------------------------------------- Course Group routines
5097:
5098: sub get_coursegroups {
5099: my ($cdom,$cnum,$group,$namespace) = @_;
5100: return(&dump($namespace,$cdom,$cnum,$group));
5101: }
5102:
5103: sub modify_coursegroup {
5104: my ($cdom,$cnum,$groupsettings) = @_;
5105: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
5106: }
5107:
5108: sub toggle_coursegroup_status {
5109: my ($cdom,$cnum,$group,$action) = @_;
5110: my ($from_namespace,$to_namespace);
5111: if ($action eq 'delete') {
5112: $from_namespace = 'coursegroups';
5113: $to_namespace = 'deleted_groups';
5114: } else {
5115: $from_namespace = 'deleted_groups';
5116: $to_namespace = 'coursegroups';
5117: }
5118: my %curr_group = &get_coursegroups($cdom,$cnum,$group,$from_namespace);
5119: if (my $tmp = &error(%curr_group)) {
5120: &Apache::lonnet::logthis('Error retrieving group: '.$tmp.' in '.$cnum.':'.$cdom);
5121: return ('read error',$tmp);
5122: } else {
5123: my %savedsettings = %curr_group;
5124: my $result = &put($to_namespace,\%savedsettings,$cdom,$cnum);
5125: my $deloutcome;
5126: if ($result eq 'ok') {
5127: $deloutcome = &del($from_namespace,[$group],$cdom,$cnum);
5128: } else {
5129: return ('write error',$result);
5130: }
5131: if ($deloutcome eq 'ok') {
5132: return 'ok';
5133: } else {
5134: return ('delete error',$deloutcome);
5135: }
5136: }
5137: }
5138:
5139: sub modify_group_roles {
5140: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
5141: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
5142: my $role = 'gr/'.&escape($userprivs);
5143: my ($uname,$udom) = split(/:/,$user);
5144: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
5145: if ($result eq 'ok') {
5146: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
5147: }
5148: return $result;
5149: }
5150:
5151: sub modify_coursegroup_membership {
5152: my ($cdom,$cnum,$membership) = @_;
5153: my $result = &put('groupmembership',$membership,$cdom,$cnum);
5154: return $result;
5155: }
5156:
5157: sub get_active_groups {
5158: my ($udom,$uname,$cdom,$cnum) = @_;
5159: my $now = time;
5160: my %groups = ();
5161: foreach my $key (keys(%env)) {
5162: if ($key =~ m-user\.role\.gr\./($match_domain)/($match_courseid)/(\w+)$-) {
5163: my ($start,$end) = split(/\./,$env{$key});
5164: if (($end!=0) && ($end<$now)) { next; }
5165: if (($start!=0) && ($start>$now)) { next; }
5166: if ($1 eq $cdom && $2 eq $cnum) {
5167: $groups{$3} = $env{$key} ;
5168: }
5169: }
5170: }
5171: return %groups;
5172: }
5173:
5174: sub get_group_membership {
5175: my ($cdom,$cnum,$group) = @_;
5176: return(&dump('groupmembership',$cdom,$cnum,$group));
5177: }
5178:
5179: sub get_users_groups {
5180: my ($udom,$uname,$courseid) = @_;
5181: my @usersgroups;
5182: my $cachetime=1800;
5183:
5184: my $hashid="$udom:$uname:$courseid";
5185: my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
5186: if (defined($cached)) {
5187: @usersgroups = split(/:/,$grouplist);
5188: } else {
5189: $grouplist = '';
5190: my $courseurl = &courseid_to_courseurl($courseid);
5191: my %roleshash = &dump('roles',$udom,$uname,$courseurl);
5192: my $access_end = $env{'course.'.$courseid.
5193: '.default_enrollment_end_date'};
5194: my $now = time;
5195: foreach my $key (keys(%roleshash)) {
5196: if ($key =~ /^\Q$courseurl\E\/(\w+)\_gr$/) {
5197: my $group = $1;
5198: if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
5199: my $start = $2;
5200: my $end = $1;
5201: if ($start == -1) { next; } # deleted from group
5202: if (($start!=0) && ($start>$now)) { next; }
5203: if (($end!=0) && ($end<$now)) {
5204: if ($access_end && $access_end < $now) {
5205: if ($access_end - $end < 86400) {
5206: push(@usersgroups,$group);
5207: }
5208: }
5209: next;
5210: }
5211: push(@usersgroups,$group);
5212: }
5213: }
5214: }
5215: @usersgroups = &sort_course_groups($courseid,@usersgroups);
5216: $grouplist = join(':',@usersgroups);
5217: &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
5218: }
5219: return @usersgroups;
5220: }
5221:
5222: sub devalidate_getgroups_cache {
5223: my ($udom,$uname,$cdom,$cnum)=@_;
5224: my $courseid = $cdom.'_'.$cnum;
5225:
5226: my $hashid="$udom:$uname:$courseid";
5227: &devalidate_cache_new('getgroups',$hashid);
5228: }
5229:
5230: # ------------------------------------------------------------------ Plain Text
5231:
5232: sub plaintext {
5233: my ($short,$type,$cid) = @_;
5234: if ($short =~ /^cr/) {
5235: return (split('/',$short))[-1];
5236: }
5237: if (!defined($cid)) {
5238: $cid = $env{'request.course.id'};
5239: }
5240: if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
5241: return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
5242: '.plaintext'});
5243: }
5244: my %rolenames = (
5245: Course => 'std',
5246: Group => 'alt1',
5247: );
5248: if (defined($type) &&
5249: defined($rolenames{$type}) &&
5250: defined($prp{$short}{$rolenames{$type}})) {
5251: return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
5252: } else {
5253: return &Apache::lonlocal::mt($prp{$short}{'std'});
5254: }
5255: }
5256:
5257: # ----------------------------------------------------------------- Assign Role
5258:
5259: sub assignrole {
5260: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
5261: my $mrole;
5262: if ($role =~ /^cr\//) {
5263: my $cwosec=$url;
5264: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
5265: unless (&allowed('ccr',$cwosec)) {
5266: &logthis('Refused custom assignrole: '.
5267: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
5268: $env{'user.name'}.' at '.$env{'user.domain'});
5269: return 'refused';
5270: }
5271: $mrole='cr';
5272: } elsif ($role =~ /^gr\//) {
5273: my $cwogrp=$url;
5274: $cwogrp=~s{^/($match_domain)/($match_courseid)/.*}{$1/$2};
5275: unless (&allowed('mdg',$cwogrp)) {
5276: &logthis('Refused group assignrole: '.
5277: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
5278: $env{'user.name'}.' at '.$env{'user.domain'});
5279: return 'refused';
5280: }
5281: $mrole='gr';
5282: } else {
5283: my $cwosec=$url;
5284: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
5285: if (!(&allowed('c'.$role,$cwosec)) && !(&allowed('c'.$role,$udom))) {
5286: my $refused;
5287: if (($env{'request.course.sec'} ne '') && ($role eq 'st')) {
5288: if (!(&allowed('c'.$role,$url))) {
5289: $refused = 1;
5290: }
5291: } else {
5292: $refused = 1;
5293: }
5294: if ($refused) {
5295: &logthis('Refused assignrole: '.$udom.' '.$uname.' '.$url.
5296: ' '.$role.' '.$end.' '.$start.' by '.
5297: $env{'user.name'}.' at '.$env{'user.domain'});
5298: return 'refused';
5299: }
5300: }
5301: $mrole=$role;
5302: }
5303: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
5304: "$udom:$uname:$url".'_'."$mrole=$role";
5305: if ($end) { $command.='_'.$end; }
5306: if ($start) {
5307: if ($end) {
5308: $command.='_'.$start;
5309: } else {
5310: $command.='_0_'.$start;
5311: }
5312: }
5313: my $origstart = $start;
5314: my $origend = $end;
5315: # actually delete
5316: if ($deleteflag) {
5317: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
5318: # modify command to delete the role
5319: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
5320: "$udom:$uname:$url".'_'."$mrole";
5321: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
5322: # set start and finish to negative values for userrolelog
5323: $start=-1;
5324: $end=-1;
5325: }
5326: }
5327: # send command
5328: my $answer=&reply($command,&homeserver($uname,$udom));
5329: # log new user role if status is ok
5330: if ($answer eq 'ok') {
5331: &userrolelog($role,$uname,$udom,$url,$start,$end);
5332: # for course roles, perform group memberships changes triggered by role change.
5333: unless ($role =~ /^gr/) {
5334: &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
5335: $origstart);
5336: }
5337: }
5338: return $answer;
5339: }
5340:
5341: # -------------------------------------------------- Modify user authentication
5342: # Overrides without validation
5343:
5344: sub modifyuserauth {
5345: my ($udom,$uname,$umode,$upass)=@_;
5346: my $uhome=&homeserver($uname,$udom);
5347: unless (&allowed('mau',$udom)) { return 'refused'; }
5348: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
5349: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
5350: ' in domain '.$env{'request.role.domain'});
5351: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
5352: &escape($upass),$uhome);
5353: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
5354: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
5355: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
5356: &log($udom,,$uname,$uhome,
5357: 'Authentication changed by '.$env{'user.domain'}.', '.
5358: $env{'user.name'}.', '.$umode.
5359: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
5360: unless ($reply eq 'ok') {
5361: &logthis('Authentication mode error: '.$reply);
5362: return 'error: '.$reply;
5363: }
5364: return 'ok';
5365: }
5366:
5367: # --------------------------------------------------------------- Modify a user
5368:
5369: sub modifyuser {
5370: my ($udom, $uname, $uid,
5371: $umode, $upass, $first,
5372: $middle, $last, $gene,
5373: $forceid, $desiredhome, $email)=@_;
5374: $udom= &LONCAPA::clean_domain($udom);
5375: $uname=&LONCAPA::clean_username($uname);
5376: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
5377: $umode.', '.$first.', '.$middle.', '.
5378: $last.', '.$gene.'(forceid: '.$forceid.')'.
5379: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
5380: ' desiredhome not specified').
5381: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
5382: ' in domain '.$env{'request.role.domain'});
5383: my $uhome=&homeserver($uname,$udom,'true');
5384: # ----------------------------------------------------------------- Create User
5385: if (($uhome eq 'no_host') &&
5386: (($umode && $upass) || ($umode eq 'localauth'))) {
5387: my $unhome='';
5388: if (defined($desiredhome) && &host_domain($desiredhome) eq $udom) {
5389: $unhome = $desiredhome;
5390: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
5391: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
5392: } else { # load balancing routine for determining $unhome
5393: my $loadm=10000000;
5394: my %servers = &get_servers($udom,'library');
5395: foreach my $tryserver (keys(%servers)) {
5396: my $answer=reply('load',$tryserver);
5397: if (($answer=~/\d+/) && ($answer<$loadm)) {
5398: $loadm=$answer;
5399: $unhome=$tryserver;
5400: }
5401: }
5402: }
5403: if (($unhome eq '') || ($unhome eq 'no_host')) {
5404: return 'error: unable to find a home server for '.$uname.
5405: ' in domain '.$udom;
5406: }
5407: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
5408: &escape($upass),$unhome);
5409: unless ($reply eq 'ok') {
5410: return 'error: '.$reply;
5411: }
5412: $uhome=&homeserver($uname,$udom,'true');
5413: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
5414: return 'error: unable verify users home machine.';
5415: }
5416: } # End of creation of new user
5417: # ---------------------------------------------------------------------- Add ID
5418: if ($uid) {
5419: $uid=~tr/A-Z/a-z/;
5420: my %uidhash=&idrget($udom,$uname);
5421: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
5422: && (!$forceid)) {
5423: unless ($uid eq $uidhash{$uname}) {
5424: return 'error: user id "'.$uid.'" does not match '.
5425: 'current user id "'.$uidhash{$uname}.'".';
5426: }
5427: } else {
5428: &idput($udom,($uname => $uid));
5429: }
5430: }
5431: # -------------------------------------------------------------- Add names, etc
5432: my @tmp=&get('environment',
5433: ['firstname','middlename','lastname','generation','id',
5434: 'permanentemail'],
5435: $udom,$uname);
5436: my %names;
5437: if ($tmp[0] =~ m/^error:.*/) {
5438: %names=();
5439: } else {
5440: %names = @tmp;
5441: }
5442: #
5443: # Make sure to not trash student environment if instructor does not bother
5444: # to supply name and email information
5445: #
5446: if ($first) { $names{'firstname'} = $first; }
5447: if (defined($middle)) { $names{'middlename'} = $middle; }
5448: if ($last) { $names{'lastname'} = $last; }
5449: if (defined($gene)) { $names{'generation'} = $gene; }
5450: if ($email) {
5451: $email=~s/[^\w\@\.\-\,]//gs;
5452: if ($email=~/\@/) { $names{'notification'} = $email;
5453: $names{'critnotification'} = $email;
5454: $names{'permanentemail'} = $email; }
5455: }
5456: if ($uid) { $names{'id'} = $uid; }
5457: my $reply = &put('environment', \%names, $udom,$uname);
5458: if ($reply ne 'ok') { return 'error: '.$reply; }
5459: my $sqlresult = &update_allusers_table($uname,$udom,\%names);
5460: &devalidate_cache_new('namescache',$uname.':'.$udom);
5461: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
5462: $umode.', '.$first.', '.$middle.', '.
5463: $last.', '.$gene.' by '.
5464: $env{'user.name'}.' at '.$env{'user.domain'});
5465: return 'ok';
5466: }
5467:
5468: # -------------------------------------------------------------- Modify student
5469:
5470: sub modifystudent {
5471: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
5472: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
5473: if (!$cid) {
5474: unless ($cid=$env{'request.course.id'}) {
5475: return 'not_in_class';
5476: }
5477: }
5478: # --------------------------------------------------------------- Make the user
5479: my $reply=&modifyuser
5480: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
5481: $desiredhome,$email);
5482: unless ($reply eq 'ok') { return $reply; }
5483: # This will cause &modify_student_enrollment to get the uid from the
5484: # students environment
5485: $uid = undef if (!$forceid);
5486: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
5487: $gene,$usec,$end,$start,$type,$locktype,$cid);
5488: return $reply;
5489: }
5490:
5491: sub modify_student_enrollment {
5492: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
5493: my ($cdom,$cnum,$chome);
5494: if (!$cid) {
5495: unless ($cid=$env{'request.course.id'}) {
5496: return 'not_in_class';
5497: }
5498: $cdom=$env{'course.'.$cid.'.domain'};
5499: $cnum=$env{'course.'.$cid.'.num'};
5500: } else {
5501: ($cdom,$cnum)=split(/_/,$cid);
5502: }
5503: $chome=$env{'course.'.$cid.'.home'};
5504: if (!$chome) {
5505: $chome=&homeserver($cnum,$cdom);
5506: }
5507: if (!$chome) { return 'unknown_course'; }
5508: # Make sure the user exists
5509: my $uhome=&homeserver($uname,$udom);
5510: if (($uhome eq '') || ($uhome eq 'no_host')) {
5511: return 'error: no such user';
5512: }
5513: # Get student data if we were not given enough information
5514: if (!defined($first) || $first eq '' ||
5515: !defined($last) || $last eq '' ||
5516: !defined($uid) || $uid eq '' ||
5517: !defined($middle) || $middle eq '' ||
5518: !defined($gene) || $gene eq '') {
5519: # They did not supply us with enough data to enroll the student, so
5520: # we need to pick up more information.
5521: my %tmp = &get('environment',
5522: ['firstname','middlename','lastname', 'generation','id']
5523: ,$udom,$uname);
5524:
5525: #foreach my $key (keys(%tmp)) {
5526: # &logthis("key $key = ".$tmp{$key});
5527: #}
5528: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
5529: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
5530: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
5531: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
5532: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
5533: }
5534: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
5535: my $reply=cput('classlist',
5536: {"$uname:$udom" =>
5537: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
5538: $cdom,$cnum);
5539: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
5540: return 'error: '.$reply;
5541: } else {
5542: &devalidate_getsection_cache($udom,$uname,$cid);
5543: }
5544: # Add student role to user
5545: my $uurl='/'.$cid;
5546: $uurl=~s/\_/\//g;
5547: if ($usec) {
5548: $uurl.='/'.$usec;
5549: }
5550: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
5551: }
5552:
5553: sub format_name {
5554: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
5555: my $name;
5556: if ($first ne 'lastname') {
5557: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
5558: } else {
5559: if ($lastname=~/\S/) {
5560: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
5561: $name=~s/\s+,/,/;
5562: } else {
5563: $name.= $firstname.' '.$middlename.' '.$generation;
5564: }
5565: }
5566: $name=~s/^\s+//;
5567: $name=~s/\s+$//;
5568: $name=~s/\s+/ /g;
5569: return $name;
5570: }
5571:
5572: # ------------------------------------------------- Write to course preferences
5573:
5574: sub writecoursepref {
5575: my ($courseid,%prefs)=@_;
5576: $courseid=~s/^\///;
5577: $courseid=~s/\_/\//g;
5578: my ($cdomain,$cnum)=split(/\//,$courseid);
5579: my $chome=homeserver($cnum,$cdomain);
5580: if (($chome eq '') || ($chome eq 'no_host')) {
5581: return 'error: no such course';
5582: }
5583: my $cstring='';
5584: foreach my $pref (keys(%prefs)) {
5585: $cstring.=&escape($pref).'='.&escape($prefs{$pref}).'&';
5586: }
5587: $cstring=~s/\&$//;
5588: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
5589: }
5590:
5591: # ---------------------------------------------------------- Make/modify course
5592:
5593: sub createcourse {
5594: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
5595: $course_owner,$crstype)=@_;
5596: $url=&declutter($url);
5597: my $cid='';
5598: unless (&allowed('ccc',$udom)) {
5599: return 'refused';
5600: }
5601: # ------------------------------------------------------------------- Create ID
5602: my $uname=int(1+rand(9)).
5603: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
5604: substr($$.time,0,5).unpack("H8",pack("I32",time)).
5605: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5606: # ----------------------------------------------- Make sure that does not exist
5607: my $uhome=&homeserver($uname,$udom,'true');
5608: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5609: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
5610: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5611: $uhome=&homeserver($uname,$udom,'true');
5612: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5613: return 'error: unable to generate unique course-ID';
5614: }
5615: }
5616: # ------------------------------------------------ Check supplied server name
5617: $course_server = $env{'user.homeserver'} if (! defined($course_server));
5618: if (! &is_library($course_server)) {
5619: return 'error:bad server name '.$course_server;
5620: }
5621: # ------------------------------------------------------------- Make the course
5622: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
5623: $course_server);
5624: unless ($reply eq 'ok') { return 'error: '.$reply; }
5625: $uhome=&homeserver($uname,$udom,'true');
5626: if (($uhome eq '') || ($uhome eq 'no_host')) {
5627: return 'error: no such course';
5628: }
5629: # ----------------------------------------------------------------- Course made
5630: # log existence
5631: my $newcourse = {
5632: $udom.'_'.$uname => {
5633: description => $description,
5634: inst_code => $inst_code,
5635: owner => $course_owner,
5636: type => $crstype,
5637: },
5638: };
5639: &courseidput($udom,$newcourse,$uhome,'notime');
5640: # set toplevel url
5641: my $topurl=$url;
5642: unless ($nonstandard) {
5643: # ------------------------------------------ For standard courses, make top url
5644: my $mapurl=&clutter($url);
5645: if ($mapurl eq '/res/') { $mapurl=''; }
5646: $env{'form.initmap'}=(<<ENDINITMAP);
5647: <map>
5648: <resource id="1" type="start"></resource>
5649: <resource id="2" src="$mapurl"></resource>
5650: <resource id="3" type="finish"></resource>
5651: <link index="1" from="1" to="2"></link>
5652: <link index="2" from="2" to="3"></link>
5653: </map>
5654: ENDINITMAP
5655: $topurl=&declutter(
5656: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
5657: );
5658: }
5659: # ----------------------------------------------------------- Write preferences
5660: &writecoursepref($udom.'_'.$uname,
5661: ('description' => $description,
5662: 'url' => $topurl));
5663: return '/'.$udom.'/'.$uname;
5664: }
5665:
5666: sub is_course {
5667: my ($cdom,$cnum) = @_;
5668: my %courses = &courseiddump($cdom,'.',1,'.','.',$cnum,undef,
5669: undef,'.',undef,1);
5670: if (exists($courses{$cdom.'_'.$cnum})) {
5671: return 1;
5672: }
5673: return 0;
5674: }
5675:
5676: # ---------------------------------------------------------- Assign Custom Role
5677:
5678: sub assigncustomrole {
5679: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
5680: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
5681: $end,$start,$deleteflag);
5682: }
5683:
5684: # ----------------------------------------------------------------- Revoke Role
5685:
5686: sub revokerole {
5687: my ($udom,$uname,$url,$role,$deleteflag)=@_;
5688: my $now=time;
5689: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
5690: }
5691:
5692: # ---------------------------------------------------------- Revoke Custom Role
5693:
5694: sub revokecustomrole {
5695: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
5696: my $now=time;
5697: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
5698: $deleteflag);
5699: }
5700:
5701: # ------------------------------------------------------------ Disk usage
5702: sub diskusage {
5703: my ($udom,$uname,$directoryRoot)=@_;
5704: $directoryRoot =~ s/\/$//;
5705: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
5706: return $listing;
5707: }
5708:
5709: sub is_locked {
5710: my ($file_name, $domain, $user) = @_;
5711: my @check;
5712: my $is_locked;
5713: push @check, $file_name;
5714: my %locked = &get('file_permissions',\@check,
5715: $env{'user.domain'},$env{'user.name'});
5716: my ($tmp)=keys(%locked);
5717: if ($tmp=~/^error:/) { undef(%locked); }
5718:
5719: if (ref($locked{$file_name}) eq 'ARRAY') {
5720: $is_locked = 'false';
5721: foreach my $entry (@{$locked{$file_name}}) {
5722: if (ref($entry) eq 'ARRAY') {
5723: $is_locked = 'true';
5724: last;
5725: }
5726: }
5727: } else {
5728: $is_locked = 'false';
5729: }
5730: }
5731:
5732: sub declutter_portfile {
5733: my ($file) = @_;
5734: $file =~ s{^(/portfolio/|portfolio/)}{/};
5735: return $file;
5736: }
5737:
5738: # ------------------------------------------------------------- Mark as Read Only
5739:
5740: sub mark_as_readonly {
5741: my ($domain,$user,$files,$what) = @_;
5742: my %current_permissions = &dump('file_permissions',$domain,$user);
5743: my ($tmp)=keys(%current_permissions);
5744: if ($tmp=~/^error:/) { undef(%current_permissions); }
5745: foreach my $file (@{$files}) {
5746: $file = &declutter_portfile($file);
5747: push(@{$current_permissions{$file}},$what);
5748: }
5749: &put('file_permissions',\%current_permissions,$domain,$user);
5750: return;
5751: }
5752:
5753: # ------------------------------------------------------------Save Selected Files
5754:
5755: sub save_selected_files {
5756: my ($user, $path, @files) = @_;
5757: my $filename = $user."savedfiles";
5758: my @other_files = &files_not_in_path($user, $path);
5759: open (OUT, '>'.$tmpdir.$filename);
5760: foreach my $file (@files) {
5761: print (OUT $env{'form.currentpath'}.$file."\n");
5762: }
5763: foreach my $file (@other_files) {
5764: print (OUT $file."\n");
5765: }
5766: close (OUT);
5767: return 'ok';
5768: }
5769:
5770: sub clear_selected_files {
5771: my ($user) = @_;
5772: my $filename = $user."savedfiles";
5773: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5774: print (OUT undef);
5775: close (OUT);
5776: return ("ok");
5777: }
5778:
5779: sub files_in_path {
5780: my ($user, $path) = @_;
5781: my $filename = $user."savedfiles";
5782: my %return_files;
5783: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5784: while (my $line_in = <IN>) {
5785: chomp ($line_in);
5786: my @paths_and_file = split (m!/!, $line_in);
5787: my $file_part = pop (@paths_and_file);
5788: my $path_part = join ('/', @paths_and_file);
5789: $path_part.='/';
5790: my $path_and_file = $path_part.$file_part;
5791: if ($path_part eq $path) {
5792: $return_files{$file_part}= 'selected';
5793: }
5794: }
5795: close (IN);
5796: return (\%return_files);
5797: }
5798:
5799: # called in portfolio select mode, to show files selected NOT in current directory
5800: sub files_not_in_path {
5801: my ($user, $path) = @_;
5802: my $filename = $user."savedfiles";
5803: my @return_files;
5804: my $path_part;
5805: open(IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5806: while (my $line = <IN>) {
5807: #ok, I know it's clunky, but I want it to work
5808: my @paths_and_file = split(m|/|, $line);
5809: my $file_part = pop(@paths_and_file);
5810: chomp($file_part);
5811: my $path_part = join('/', @paths_and_file);
5812: $path_part .= '/';
5813: my $path_and_file = $path_part.$file_part;
5814: if ($path_part ne $path) {
5815: push(@return_files, ($path_and_file));
5816: }
5817: }
5818: close(OUT);
5819: return (@return_files);
5820: }
5821:
5822: #----------------------------------------------Get portfolio file permissions
5823:
5824: sub get_portfile_permissions {
5825: my ($domain,$user) = @_;
5826: my %current_permissions = &dump('file_permissions',$domain,$user);
5827: my ($tmp)=keys(%current_permissions);
5828: if ($tmp=~/^error:/) { undef(%current_permissions); }
5829: return \%current_permissions;
5830: }
5831:
5832: #---------------------------------------------Get portfolio file access controls
5833:
5834: sub get_access_controls {
5835: my ($current_permissions,$group,$file) = @_;
5836: my %access;
5837: my $real_file = $file;
5838: $file =~ s/\.meta$//;
5839: if (defined($file)) {
5840: if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
5841: foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
5842: $access{$real_file}{$control} = $$current_permissions{$file."\0".$control};
5843: }
5844: }
5845: } else {
5846: foreach my $key (keys(%{$current_permissions})) {
5847: if ($key =~ /\0accesscontrol$/) {
5848: if (defined($group)) {
5849: if ($key !~ m-^\Q$group\E/-) {
5850: next;
5851: }
5852: }
5853: my ($fullpath) = split(/\0/,$key);
5854: if (ref($$current_permissions{$key}) eq 'HASH') {
5855: foreach my $control (keys(%{$$current_permissions{$key}})) {
5856: $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
5857: }
5858: }
5859: }
5860: }
5861: }
5862: return %access;
5863: }
5864:
5865: sub modify_access_controls {
5866: my ($file_name,$changes,$domain,$user)=@_;
5867: my ($outcome,$deloutcome);
5868: my %store_permissions;
5869: my %new_values;
5870: my %new_control;
5871: my %translation;
5872: my @deletions = ();
5873: my $now = time;
5874: if (exists($$changes{'activate'})) {
5875: if (ref($$changes{'activate'}) eq 'HASH') {
5876: my @newitems = sort(keys(%{$$changes{'activate'}}));
5877: my $numnew = scalar(@newitems);
5878: for (my $i=0; $i<$numnew; $i++) {
5879: my $newkey = $newitems[$i];
5880: my $newid = &Apache::loncommon::get_cgi_id();
5881: if ($newkey =~ /^\d+:/) {
5882: $newkey =~ s/^(\d+)/$newid/;
5883: $translation{$1} = $newid;
5884: } elsif ($newkey =~ /^\d+_\d+_\d+:/) {
5885: $newkey =~ s/^(\d+_\d+_\d+)/$newid/;
5886: $translation{$1} = $newid;
5887: }
5888: $new_values{$file_name."\0".$newkey} =
5889: $$changes{'activate'}{$newitems[$i]};
5890: $new_control{$newkey} = $now;
5891: }
5892: }
5893: }
5894: my %todelete;
5895: my %changed_items;
5896: foreach my $action ('delete','update') {
5897: if (exists($$changes{$action})) {
5898: if (ref($$changes{$action}) eq 'HASH') {
5899: foreach my $key (keys(%{$$changes{$action}})) {
5900: my ($itemnum) = ($key =~ /^([^:]+):/);
5901: if ($action eq 'delete') {
5902: $todelete{$itemnum} = 1;
5903: } else {
5904: $changed_items{$itemnum} = $key;
5905: }
5906: }
5907: }
5908: }
5909: }
5910: # get lock on access controls for file.
5911: my $lockhash = {
5912: $file_name."\0".'locked_access_records' => $env{'user.name'}.
5913: ':'.$env{'user.domain'},
5914: };
5915: my $tries = 0;
5916: my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5917:
5918: while (($gotlock ne 'ok') && $tries <3) {
5919: $tries ++;
5920: sleep 1;
5921: $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5922: }
5923: if ($gotlock eq 'ok') {
5924: my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
5925: my ($tmp)=keys(%curr_permissions);
5926: if ($tmp=~/^error:/) { undef(%curr_permissions); }
5927: if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
5928: my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
5929: if (ref($curr_controls) eq 'HASH') {
5930: foreach my $control_item (keys(%{$curr_controls})) {
5931: my ($itemnum) = ($control_item =~ /^([^:]+):/);
5932: if (defined($todelete{$itemnum})) {
5933: push(@deletions,$file_name."\0".$control_item);
5934: } else {
5935: if (defined($changed_items{$itemnum})) {
5936: $new_control{$changed_items{$itemnum}} = $now;
5937: push(@deletions,$file_name."\0".$control_item);
5938: $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
5939: } else {
5940: $new_control{$control_item} = $$curr_controls{$control_item};
5941: }
5942: }
5943: }
5944: }
5945: }
5946: $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
5947: $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
5948: $outcome = &put('file_permissions',\%new_values,$domain,$user);
5949: # remove lock
5950: my @del_lock = ($file_name."\0".'locked_access_records');
5951: my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
5952: my ($file,$group);
5953: if (&is_course($domain,$user)) {
5954: ($group,$file) = split(/\//,$file_name,2);
5955: } else {
5956: $file = $file_name;
5957: }
5958: my $sqlresult =
5959: &update_portfolio_table($user,$domain,$file,'portfolio_access',
5960: $group);
5961: } else {
5962: $outcome = "error: could not obtain lockfile\n";
5963: }
5964: return ($outcome,$deloutcome,\%new_values,\%translation);
5965: }
5966:
5967: sub make_public_indefinitely {
5968: my ($requrl) = @_;
5969: my $now = time;
5970: my $action = 'activate';
5971: my $aclnum = 0;
5972: if (&is_portfolio_url($requrl)) {
5973: my (undef,$udom,$unum,$file_name,$group) =
5974: &parse_portfolio_url($requrl);
5975: my $current_perms = &get_portfile_permissions($udom,$unum);
5976: my %access_controls = &get_access_controls($current_perms,
5977: $group,$file_name);
5978: foreach my $key (keys(%{$access_controls{$file_name}})) {
5979: my ($num,$scope,$end,$start) =
5980: ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
5981: if ($scope eq 'public') {
5982: if ($start <= $now && $end == 0) {
5983: $action = 'none';
5984: } else {
5985: $action = 'update';
5986: $aclnum = $num;
5987: }
5988: last;
5989: }
5990: }
5991: if ($action eq 'none') {
5992: return 'ok';
5993: } else {
5994: my %changes;
5995: my $newend = 0;
5996: my $newstart = $now;
5997: my $newkey = $aclnum.':public_'.$newend.'_'.$newstart;
5998: $changes{$action}{$newkey} = {
5999: type => 'public',
6000: time => {
6001: start => $newstart,
6002: end => $newend,
6003: },
6004: };
6005: my ($outcome,$deloutcome,$new_values,$translation) =
6006: &modify_access_controls($file_name,\%changes,$udom,$unum);
6007: return $outcome;
6008: }
6009: } else {
6010: return 'invalid';
6011: }
6012: }
6013:
6014: #------------------------------------------------------Get Marked as Read Only
6015:
6016: sub get_marked_as_readonly {
6017: my ($domain,$user,$what,$group) = @_;
6018: my $current_permissions = &get_portfile_permissions($domain,$user);
6019: my @readonly_files;
6020: my $cmp1=$what;
6021: if (ref($what)) { $cmp1=join('',@{$what}) };
6022: while (my ($file_name,$value) = each(%{$current_permissions})) {
6023: if (defined($group)) {
6024: if ($file_name !~ m-^\Q$group\E/-) {
6025: next;
6026: }
6027: }
6028: if (ref($value) eq "ARRAY"){
6029: foreach my $stored_what (@{$value}) {
6030: my $cmp2=$stored_what;
6031: if (ref($stored_what) eq 'ARRAY') {
6032: $cmp2=join('',@{$stored_what});
6033: }
6034: if ($cmp1 eq $cmp2) {
6035: push(@readonly_files, $file_name);
6036: last;
6037: } elsif (!defined($what)) {
6038: push(@readonly_files, $file_name);
6039: last;
6040: }
6041: }
6042: }
6043: }
6044: return @readonly_files;
6045: }
6046: #-----------------------------------------------------------Get Marked as Read Only Hash
6047:
6048: sub get_marked_as_readonly_hash {
6049: my ($current_permissions,$group,$what) = @_;
6050: my %readonly_files;
6051: while (my ($file_name,$value) = each(%{$current_permissions})) {
6052: if (defined($group)) {
6053: if ($file_name !~ m-^\Q$group\E/-) {
6054: next;
6055: }
6056: }
6057: if (ref($value) eq "ARRAY"){
6058: foreach my $stored_what (@{$value}) {
6059: if (ref($stored_what) eq 'ARRAY') {
6060: foreach my $lock_descriptor(@{$stored_what}) {
6061: if ($lock_descriptor eq 'graded') {
6062: $readonly_files{$file_name} = 'graded';
6063: } elsif ($lock_descriptor eq 'handback') {
6064: $readonly_files{$file_name} = 'handback';
6065: } else {
6066: if (!exists($readonly_files{$file_name})) {
6067: $readonly_files{$file_name} = 'locked';
6068: }
6069: }
6070: }
6071: }
6072: }
6073: }
6074: }
6075: return %readonly_files;
6076: }
6077: # ------------------------------------------------------------ Unmark as Read Only
6078:
6079: sub unmark_as_readonly {
6080: # unmarks $file_name (if $file_name is defined), or all files locked by $what
6081: # for portfolio submissions, $what contains [$symb,$crsid]
6082: my ($domain,$user,$what,$file_name,$group) = @_;
6083: $file_name = &declutter_portfile($file_name);
6084: my $symb_crs = $what;
6085: if (ref($what)) { $symb_crs=join('',@$what); }
6086: my %current_permissions = &dump('file_permissions',$domain,$user,$group);
6087: my ($tmp)=keys(%current_permissions);
6088: if ($tmp=~/^error:/) { undef(%current_permissions); }
6089: my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
6090: foreach my $file (@readonly_files) {
6091: my $clean_file = &declutter_portfile($file);
6092: if (defined($file_name) && ($file_name ne $clean_file)) { next; }
6093: my $current_locks = $current_permissions{$file};
6094: my @new_locks;
6095: my @del_keys;
6096: if (ref($current_locks) eq "ARRAY"){
6097: foreach my $locker (@{$current_locks}) {
6098: my $compare=$locker;
6099: if (ref($locker) eq 'ARRAY') {
6100: $compare=join('',@{$locker});
6101: if ($compare ne $symb_crs) {
6102: push(@new_locks, $locker);
6103: }
6104: }
6105: }
6106: if (scalar(@new_locks) > 0) {
6107: $current_permissions{$file} = \@new_locks;
6108: } else {
6109: push(@del_keys, $file);
6110: &del('file_permissions',\@del_keys, $domain, $user);
6111: delete($current_permissions{$file});
6112: }
6113: }
6114: }
6115: &put('file_permissions',\%current_permissions,$domain,$user);
6116: return;
6117: }
6118:
6119: # ------------------------------------------------------------ Directory lister
6120:
6121: sub dirlist {
6122: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
6123:
6124: $uri=~s/^\///;
6125: $uri=~s/\/$//;
6126: my ($udom, $uname);
6127: (undef,$udom,$uname)=split(/\//,$uri);
6128: if(defined($userdomain)) {
6129: $udom = $userdomain;
6130: }
6131: if(defined($username)) {
6132: $uname = $username;
6133: }
6134:
6135: my $dirRoot = $perlvar{'lonDocRoot'};
6136: if(defined($alternateDirectoryRoot)) {
6137: $dirRoot = $alternateDirectoryRoot;
6138: $dirRoot =~ s/\/$//;
6139: }
6140:
6141: if($udom) {
6142: if($uname) {
6143: my $listing = &reply('ls2:'.$dirRoot.'/'.$uri,
6144: &homeserver($uname,$udom));
6145: my @listing_results;
6146: if ($listing eq 'unknown_cmd') {
6147: $listing = &reply('ls:'.$dirRoot.'/'.$uri,
6148: &homeserver($uname,$udom));
6149: @listing_results = split(/:/,$listing);
6150: } else {
6151: @listing_results = map { &unescape($_); } split(/:/,$listing);
6152: }
6153: return @listing_results;
6154: } elsif(!defined($alternateDirectoryRoot)) {
6155: my %allusers;
6156: my %servers = &get_servers($udom,'library');
6157: foreach my $tryserver (keys(%servers)) {
6158: my $listing = &reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
6159: $udom, $tryserver);
6160: my @listing_results;
6161: if ($listing eq 'unknown_cmd') {
6162: $listing = &reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
6163: $udom, $tryserver);
6164: @listing_results = split(/:/,$listing);
6165: } else {
6166: @listing_results =
6167: map { &unescape($_); } split(/:/,$listing);
6168: }
6169: if ($listing_results[0] ne 'no_such_dir' &&
6170: $listing_results[0] ne 'empty' &&
6171: $listing_results[0] ne 'con_lost') {
6172: foreach my $line (@listing_results) {
6173: my ($entry) = split(/&/,$line,2);
6174: $allusers{$entry} = 1;
6175: }
6176: }
6177: }
6178: my $alluserstr='';
6179: foreach my $user (sort(keys(%allusers))) {
6180: $alluserstr.=$user.'&user:';
6181: }
6182: $alluserstr=~s/:$//;
6183: return split(/:/,$alluserstr);
6184: } else {
6185: return ('missing user name');
6186: }
6187: } elsif(!defined($alternateDirectoryRoot)) {
6188: my @all_domains = sort(&all_domains());
6189: foreach my $domain (@all_domains) {
6190: $domain = $perlvar{'lonDocRoot'}.'/res/'.$domain.'/&domain';
6191: }
6192: return @all_domains;
6193: } else {
6194: return ('missing domain');
6195: }
6196: }
6197:
6198: # --------------------------------------------- GetFileTimestamp
6199: # This function utilizes dirlist and returns the date stamp for
6200: # when it was last modified. It will also return an error of -1
6201: # if an error occurs
6202:
6203: ##
6204: ## FIXME: This subroutine assumes its caller knows something about the
6205: ## directory structure of the home server for the student ($root).
6206: ## Not a good assumption to make. Since this is for looking up files
6207: ## in user directories, the full path should be constructed by lond, not
6208: ## whatever machine we request data from.
6209: ##
6210: sub GetFileTimestamp {
6211: my ($studentDomain,$studentName,$filename,$root)=@_;
6212: $studentDomain = &LONCAPA::clean_domain($studentDomain);
6213: $studentName = &LONCAPA::clean_username($studentName);
6214: my $subdir=$studentName.'__';
6215: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
6216: my $proname="$studentDomain/$subdir/$studentName";
6217: $proname .= '/'.$filename;
6218: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
6219: $studentName, $root);
6220: my @stats = split('&', $fileStat);
6221: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
6222: # @stats contains first the filename, then the stat output
6223: return $stats[10]; # so this is 10 instead of 9.
6224: } else {
6225: return -1;
6226: }
6227: }
6228:
6229: sub stat_file {
6230: my ($uri) = @_;
6231: $uri = &clutter_with_no_wrapper($uri);
6232:
6233: my ($udom,$uname,$file,$dir);
6234: if ($uri =~ m-^/(uploaded|editupload)/-) {
6235: ($udom,$uname,$file) =
6236: ($uri =~ m-/(?:uploaded|editupload)/?($match_domain)/?($match_name)/?(.*)-);
6237: $file = 'userfiles/'.$file;
6238: $dir = &propath($udom,$uname);
6239: }
6240: if ($uri =~ m-^/res/-) {
6241: ($udom,$uname) =
6242: ($uri =~ m-/(?:res)/?($match_domain)/?($match_username)/-);
6243: $file = $uri;
6244: }
6245:
6246: if (!$udom || !$uname || !$file) {
6247: # unable to handle the uri
6248: return ();
6249: }
6250:
6251: my ($result) = &dirlist($file,$udom,$uname,$dir);
6252: my @stats = split('&', $result);
6253:
6254: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
6255: shift(@stats); #filename is first
6256: return @stats;
6257: }
6258: return ();
6259: }
6260:
6261: # -------------------------------------------------------- Value of a Condition
6262:
6263: # gets the value of a specific preevaluated condition
6264: # stored in the string $env{user.state.<cid>}
6265: # or looks up a condition reference in the bighash and if if hasn't
6266: # already been evaluated recurses into docondval to get the value of
6267: # the condition, then memoizing it to
6268: # $env{user.state.<cid>.<condition>}
6269: sub directcondval {
6270: my $number=shift;
6271: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
6272: &Apache::lonuserstate::evalstate();
6273: }
6274: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
6275: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
6276: } elsif ($number =~ /^_/) {
6277: my $sub_condition;
6278: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6279: &GDBM_READER(),0640)) {
6280: $sub_condition=$bighash{'conditions'.$number};
6281: untie(%bighash);
6282: }
6283: my $value = &docondval($sub_condition);
6284: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
6285: return $value;
6286: }
6287: if ($env{'user.state.'.$env{'request.course.id'}}) {
6288: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
6289: } else {
6290: return 2;
6291: }
6292: }
6293:
6294: # get the collection of conditions for this resource
6295: sub condval {
6296: my $condidx=shift;
6297: my $allpathcond='';
6298: foreach my $cond (split(/\|/,$condidx)) {
6299: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
6300: $allpathcond.=
6301: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
6302: }
6303: }
6304: $allpathcond=~s/\|$//;
6305: return &docondval($allpathcond);
6306: }
6307:
6308: #evaluates an expression of conditions
6309: sub docondval {
6310: my ($allpathcond) = @_;
6311: my $result=0;
6312: if ($env{'request.course.id'}
6313: && defined($allpathcond)) {
6314: my $operand='|';
6315: my @stack;
6316: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
6317: if ($chunk eq '(') {
6318: push @stack,($operand,$result);
6319: } elsif ($chunk eq ')') {
6320: my $before=pop @stack;
6321: if (pop @stack eq '&') {
6322: $result=$result>$before?$before:$result;
6323: } else {
6324: $result=$result>$before?$result:$before;
6325: }
6326: } elsif (($chunk eq '&') || ($chunk eq '|')) {
6327: $operand=$chunk;
6328: } else {
6329: my $new=directcondval($chunk);
6330: if ($operand eq '&') {
6331: $result=$result>$new?$new:$result;
6332: } else {
6333: $result=$result>$new?$result:$new;
6334: }
6335: }
6336: }
6337: }
6338: return $result;
6339: }
6340:
6341: # ---------------------------------------------------- Devalidate courseresdata
6342:
6343: sub devalidatecourseresdata {
6344: my ($coursenum,$coursedomain)=@_;
6345: my $hashid=$coursenum.':'.$coursedomain;
6346: &devalidate_cache_new('courseres',$hashid);
6347: }
6348:
6349:
6350: # --------------------------------------------------- Course Resourcedata Query
6351: #
6352: # Parameters:
6353: # $coursenum - Number of the course.
6354: # $coursedomain - Domain at which the course was created.
6355: # Returns:
6356: # A hash of the course parameters along (I think) with timestamps
6357: # and version info.
6358:
6359: sub get_courseresdata {
6360: my ($coursenum,$coursedomain)=@_;
6361: my $coursehom=&homeserver($coursenum,$coursedomain);
6362: my $hashid=$coursenum.':'.$coursedomain;
6363: my ($result,$cached)=&is_cached_new('courseres',$hashid);
6364: my %dumpreply;
6365: unless (defined($cached)) {
6366: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
6367: $result=\%dumpreply;
6368: my ($tmp) = keys(%dumpreply);
6369: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
6370: &do_cache_new('courseres',$hashid,$result,600);
6371: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
6372: return $tmp;
6373: } elsif ($tmp =~ /^(error)/) {
6374: $result=undef;
6375: &do_cache_new('courseres',$hashid,$result,600);
6376: }
6377: }
6378: return $result;
6379: }
6380:
6381: sub devalidateuserresdata {
6382: my ($uname,$udom)=@_;
6383: my $hashid="$udom:$uname";
6384: &devalidate_cache_new('userres',$hashid);
6385: }
6386:
6387: sub get_userresdata {
6388: my ($uname,$udom)=@_;
6389: #most student don\'t have any data set, check if there is some data
6390: if (&EXT_cache_status($udom,$uname)) { return undef; }
6391:
6392: my $hashid="$udom:$uname";
6393: my ($result,$cached)=&is_cached_new('userres',$hashid);
6394: if (!defined($cached)) {
6395: my %resourcedata=&dump('resourcedata',$udom,$uname);
6396: $result=\%resourcedata;
6397: &do_cache_new('userres',$hashid,$result,600);
6398: }
6399: my ($tmp)=keys(%$result);
6400: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
6401: return $result;
6402: }
6403: #error 2 occurs when the .db doesn't exist
6404: if ($tmp!~/error: 2 /) {
6405: &logthis("<font color=\"blue\">WARNING:".
6406: " Trying to get resource data for ".
6407: $uname." at ".$udom.": ".
6408: $tmp."</font>");
6409: } elsif ($tmp=~/error: 2 /) {
6410: #&EXT_cache_set($udom,$uname);
6411: &do_cache_new('userres',$hashid,undef,600);
6412: undef($tmp); # not really an error so don't send it back
6413: }
6414: return $tmp;
6415: }
6416: #----------------------------------------------- resdata - return resource data
6417: # Purpose:
6418: # Return resource data for either users or for a course.
6419: # Parameters:
6420: # $name - Course/user name.
6421: # $domain - Name of the domain the user/course is registered on.
6422: # $type - Type of thing $name is (must be 'course' or 'user'
6423: # @which - Array of names of resources desired.
6424: # Returns:
6425: # The value of the first reasource in @which that is found in the
6426: # resource hash.
6427: # Exceptional Conditions:
6428: # If the $type passed in is not valid (not the string 'course' or
6429: # 'user', an undefined reference is returned.
6430: # If none of the resources are found, an undef is returned
6431: sub resdata {
6432: my ($name,$domain,$type,@which)=@_;
6433: my $result;
6434: if ($type eq 'course') {
6435: $result=&get_courseresdata($name,$domain);
6436: } elsif ($type eq 'user') {
6437: $result=&get_userresdata($name,$domain);
6438: }
6439: if (!ref($result)) { return $result; }
6440: foreach my $item (@which) {
6441: if (defined($result->{$item->[0]})) {
6442: return [$result->{$item->[0]},$item->[1]];
6443: }
6444: }
6445: return undef;
6446: }
6447:
6448: #
6449: # EXT resource caching routines
6450: #
6451:
6452: sub clear_EXT_cache_status {
6453: &delenv('cache.EXT.');
6454: }
6455:
6456: sub EXT_cache_status {
6457: my ($target_domain,$target_user) = @_;
6458: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
6459: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
6460: # We know already the user has no data
6461: return 1;
6462: } else {
6463: return 0;
6464: }
6465: }
6466:
6467: sub EXT_cache_set {
6468: my ($target_domain,$target_user) = @_;
6469: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
6470: #&appenv($cachename => time);
6471: }
6472:
6473: # --------------------------------------------------------- Value of a Variable
6474: sub EXT {
6475:
6476: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
6477: unless ($varname) { return ''; }
6478: #get real user name/domain, courseid and symb
6479: my $courseid;
6480: my $publicuser;
6481: if ($symbparm) {
6482: $symbparm=&get_symb_from_alias($symbparm);
6483: }
6484: if (!($uname && $udom)) {
6485: (my $cursymb,$courseid,$udom,$uname,$publicuser)= &whichuser($symbparm);
6486: if (!$symbparm) { $symbparm=$cursymb; }
6487: } else {
6488: $courseid=$env{'request.course.id'};
6489: }
6490: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
6491: my $rest;
6492: if (defined($therest[0])) {
6493: $rest=join('.',@therest);
6494: } else {
6495: $rest='';
6496: }
6497:
6498: my $qualifierrest=$qualifier;
6499: if ($rest) { $qualifierrest.='.'.$rest; }
6500: my $spacequalifierrest=$space;
6501: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
6502: if ($realm eq 'user') {
6503: # --------------------------------------------------------------- user.resource
6504: if ($space eq 'resource') {
6505: if ( (defined($Apache::lonhomework::parsing_a_problem)
6506: || defined($Apache::lonhomework::parsing_a_task))
6507: &&
6508: ($symbparm eq &symbread()) ) {
6509: # if we are in the middle of processing the resource the
6510: # get the value we are planning on committing
6511: if (defined($Apache::lonhomework::results{$qualifierrest})) {
6512: return $Apache::lonhomework::results{$qualifierrest};
6513: } else {
6514: return $Apache::lonhomework::history{$qualifierrest};
6515: }
6516: } else {
6517: my %restored;
6518: if ($publicuser || $env{'request.state'} eq 'construct') {
6519: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
6520: } else {
6521: %restored=&restore($symbparm,$courseid,$udom,$uname);
6522: }
6523: return $restored{$qualifierrest};
6524: }
6525: # ----------------------------------------------------------------- user.access
6526: } elsif ($space eq 'access') {
6527: # FIXME - not supporting calls for a specific user
6528: return &allowed($qualifier,$rest);
6529: # ------------------------------------------ user.preferences, user.environment
6530: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
6531: if (($uname eq $env{'user.name'}) &&
6532: ($udom eq $env{'user.domain'})) {
6533: return $env{join('.',('environment',$qualifierrest))};
6534: } else {
6535: my %returnhash;
6536: if (!$publicuser) {
6537: %returnhash=&userenvironment($udom,$uname,
6538: $qualifierrest);
6539: }
6540: return $returnhash{$qualifierrest};
6541: }
6542: # ----------------------------------------------------------------- user.course
6543: } elsif ($space eq 'course') {
6544: # FIXME - not supporting calls for a specific user
6545: return $env{join('.',('request.course',$qualifier))};
6546: # ------------------------------------------------------------------- user.role
6547: } elsif ($space eq 'role') {
6548: # FIXME - not supporting calls for a specific user
6549: my ($role,$where)=split(/\./,$env{'request.role'});
6550: if ($qualifier eq 'value') {
6551: return $role;
6552: } elsif ($qualifier eq 'extent') {
6553: return $where;
6554: }
6555: # ----------------------------------------------------------------- user.domain
6556: } elsif ($space eq 'domain') {
6557: return $udom;
6558: # ------------------------------------------------------------------- user.name
6559: } elsif ($space eq 'name') {
6560: return $uname;
6561: # ---------------------------------------------------- Any other user namespace
6562: } else {
6563: my %reply;
6564: if (!$publicuser) {
6565: %reply=&get($space,[$qualifierrest],$udom,$uname);
6566: }
6567: return $reply{$qualifierrest};
6568: }
6569: } elsif ($realm eq 'query') {
6570: # ---------------------------------------------- pull stuff out of query string
6571: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
6572: [$spacequalifierrest]);
6573: return $env{'form.'.$spacequalifierrest};
6574: } elsif ($realm eq 'request') {
6575: # ------------------------------------------------------------- request.browser
6576: if ($space eq 'browser') {
6577: if ($qualifier eq 'textremote') {
6578: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
6579: return 1;
6580: } else {
6581: return 0;
6582: }
6583: } else {
6584: return $env{'browser.'.$qualifier};
6585: }
6586: # ------------------------------------------------------------ request.filename
6587: } else {
6588: return $env{'request.'.$spacequalifierrest};
6589: }
6590: } elsif ($realm eq 'course') {
6591: # ---------------------------------------------------------- course.description
6592: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
6593: } elsif ($realm eq 'resource') {
6594:
6595: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
6596: if (!$symbparm) { $symbparm=&symbread(); }
6597: }
6598:
6599: if ($space eq 'title') {
6600: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
6601: return &gettitle($symbparm);
6602: }
6603:
6604: if ($space eq 'map') {
6605: my ($map) = &decode_symb($symbparm);
6606: return &symbread($map);
6607: }
6608: if ($space eq 'filename') {
6609: if ($symbparm) {
6610: return &clutter((&decode_symb($symbparm))[2]);
6611: }
6612: return &hreflocation('',$env{'request.filename'});
6613: }
6614:
6615: my ($section, $group, @groups);
6616: my ($courselevelm,$courselevel);
6617: if ($symbparm && defined($courseid) &&
6618: $courseid eq $env{'request.course.id'}) {
6619:
6620: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
6621:
6622: # ----------------------------------------------------- Cascading lookup scheme
6623: my $symbp=$symbparm;
6624: my $mapp=&deversion((&decode_symb($symbp))[0]);
6625:
6626: my $symbparm=$symbp.'.'.$spacequalifierrest;
6627: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
6628:
6629: if (($env{'user.name'} eq $uname) &&
6630: ($env{'user.domain'} eq $udom)) {
6631: $section=$env{'request.course.sec'};
6632: @groups = split(/:/,$env{'request.course.groups'});
6633: @groups=&sort_course_groups($courseid,@groups);
6634: } else {
6635: if (! defined($usection)) {
6636: $section=&getsection($udom,$uname,$courseid);
6637: } else {
6638: $section = $usection;
6639: }
6640: @groups = &get_users_groups($udom,$uname,$courseid);
6641: }
6642:
6643: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
6644: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
6645: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
6646:
6647: $courselevel=$courseid.'.'.$spacequalifierrest;
6648: my $courselevelr=$courseid.'.'.$symbparm;
6649: $courselevelm=$courseid.'.'.$mapparm;
6650:
6651: # ----------------------------------------------------------- first, check user
6652:
6653: my $userreply=&resdata($uname,$udom,'user',
6654: ([$courselevelr,'resource'],
6655: [$courselevelm,'map' ],
6656: [$courselevel, 'course' ]));
6657: if (defined($userreply)) { return &get_reply($userreply); }
6658:
6659: # ------------------------------------------------ second, check some of course
6660: my $coursereply;
6661: if (@groups > 0) {
6662: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
6663: $mapparm,$spacequalifierrest);
6664: if (defined($coursereply)) { return &get_reply($coursereply); }
6665: }
6666:
6667: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6668: $env{'course.'.$courseid.'.domain'},
6669: 'course',
6670: ([$seclevelr, 'resource'],
6671: [$seclevelm, 'map' ],
6672: [$seclevel, 'course' ],
6673: [$courselevelr,'resource']));
6674: if (defined($coursereply)) { return &get_reply($coursereply); }
6675:
6676: # ------------------------------------------------------ third, check map parms
6677: my %parmhash=();
6678: my $thisparm='';
6679: if (tie(%parmhash,'GDBM_File',
6680: $env{'request.course.fn'}.'_parms.db',
6681: &GDBM_READER(),0640)) {
6682: $thisparm=$parmhash{$symbparm};
6683: untie(%parmhash);
6684: }
6685: if ($thisparm) { return &get_reply([$thisparm,'resource']); }
6686: }
6687: # ------------------------------------------ fourth, look in resource metadata
6688:
6689: $spacequalifierrest=~s/\./\_/;
6690: my $filename;
6691: if (!$symbparm) { $symbparm=&symbread(); }
6692: if ($symbparm) {
6693: $filename=(&decode_symb($symbparm))[2];
6694: } else {
6695: $filename=$env{'request.filename'};
6696: }
6697: my $metadata=&metadata($filename,$spacequalifierrest);
6698: if (defined($metadata)) { return &get_reply([$metadata,'resource']); }
6699: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
6700: if (defined($metadata)) { return &get_reply([$metadata,'resource']); }
6701:
6702: # ---------------------------------------------- fourth, look in rest of course
6703: if ($symbparm && defined($courseid) &&
6704: $courseid eq $env{'request.course.id'}) {
6705: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6706: $env{'course.'.$courseid.'.domain'},
6707: 'course',
6708: ([$courselevelm,'map' ],
6709: [$courselevel, 'course']));
6710: if (defined($coursereply)) { return &get_reply($coursereply); }
6711: }
6712: # ------------------------------------------------------------------ Cascade up
6713: unless ($space eq '0') {
6714: my @parts=split(/_/,$space);
6715: my $id=pop(@parts);
6716: my $part=join('_',@parts);
6717: if ($part eq '') { $part='0'; }
6718: my @partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
6719: $symbparm,$udom,$uname,$section,1);
6720: if (defined($partgeneral[0])) { return &get_reply(\@partgeneral); }
6721: }
6722: if ($recurse) { return undef; }
6723: my $pack_def=&packages_tab_default($filename,$varname);
6724: if (defined($pack_def)) { return &get_reply([$pack_def,'resource']); }
6725: # ---------------------------------------------------- Any other user namespace
6726: } elsif ($realm eq 'environment') {
6727: # ----------------------------------------------------------------- environment
6728: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
6729: return $env{'environment.'.$spacequalifierrest};
6730: } else {
6731: if ($uname eq 'anonymous' && $udom eq '') {
6732: return '';
6733: }
6734: my %returnhash=&userenvironment($udom,$uname,
6735: $spacequalifierrest);
6736: return $returnhash{$spacequalifierrest};
6737: }
6738: } elsif ($realm eq 'system') {
6739: # ----------------------------------------------------------------- system.time
6740: if ($space eq 'time') {
6741: return time;
6742: }
6743: } elsif ($realm eq 'server') {
6744: # ----------------------------------------------------------------- system.time
6745: if ($space eq 'name') {
6746: return $ENV{'SERVER_NAME'};
6747: }
6748: }
6749: return '';
6750: }
6751:
6752: sub get_reply {
6753: my ($reply_value) = @_;
6754: if (ref($reply_value) eq 'ARRAY') {
6755: if (wantarray) {
6756: return @$reply_value;
6757: }
6758: return $reply_value->[0];
6759: } else {
6760: return $reply_value;
6761: }
6762: }
6763:
6764: sub check_group_parms {
6765: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
6766: my @groupitems = ();
6767: my $resultitem;
6768: my @levels = ([$symbparm,'resource'],[$mapparm,'map'],[$what,'course']);
6769: foreach my $group (@{$groups}) {
6770: foreach my $level (@levels) {
6771: my $item = $courseid.'.['.$group.'].'.$level->[0];
6772: push(@groupitems,[$item,$level->[1]]);
6773: }
6774: }
6775: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
6776: $env{'course.'.$courseid.'.domain'},
6777: 'course',@groupitems);
6778: return $coursereply;
6779: }
6780:
6781: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
6782: my ($courseid,@groups) = @_;
6783: @groups = sort(@groups);
6784: return @groups;
6785: }
6786:
6787: sub packages_tab_default {
6788: my ($uri,$varname)=@_;
6789: my (undef,$part,$name)=split(/\./,$varname);
6790:
6791: my (@extension,@specifics,$do_default);
6792: foreach my $package (split(/,/,&metadata($uri,'packages'))) {
6793: my ($pack_type,$pack_part)=split(/_/,$package,2);
6794: if ($pack_type eq 'default') {
6795: $do_default=1;
6796: } elsif ($pack_type eq 'extension') {
6797: push(@extension,[$package,$pack_type,$pack_part]);
6798: } elsif ($pack_part eq $part || $pack_type eq 'part') {
6799: # only look at packages defaults for packages that this id is
6800: push(@specifics,[$package,$pack_type,$pack_part]);
6801: }
6802: }
6803: # first look for a package that matches the requested part id
6804: foreach my $package (@specifics) {
6805: my (undef,$pack_type,$pack_part)=@{$package};
6806: next if ($pack_part ne $part);
6807: if (defined($packagetab{"$pack_type&$name&default"})) {
6808: return $packagetab{"$pack_type&$name&default"};
6809: }
6810: }
6811: # look for any possible matching non extension_ package
6812: foreach my $package (@specifics) {
6813: my (undef,$pack_type,$pack_part)=@{$package};
6814: if (defined($packagetab{"$pack_type&$name&default"})) {
6815: return $packagetab{"$pack_type&$name&default"};
6816: }
6817: if ($pack_type eq 'part') { $pack_part='0'; }
6818: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
6819: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
6820: }
6821: }
6822: # look for any posible extension_ match
6823: foreach my $package (@extension) {
6824: my ($package,$pack_type)=@{$package};
6825: if (defined($packagetab{"$pack_type&$name&default"})) {
6826: return $packagetab{"$pack_type&$name&default"};
6827: }
6828: if (defined($packagetab{$package."&$name&default"})) {
6829: return $packagetab{$package."&$name&default"};
6830: }
6831: }
6832: # look for a global default setting
6833: if ($do_default && defined($packagetab{"default&$name&default"})) {
6834: return $packagetab{"default&$name&default"};
6835: }
6836: return undef;
6837: }
6838:
6839: sub add_prefix_and_part {
6840: my ($prefix,$part)=@_;
6841: my $keyroot;
6842: if (defined($prefix) && $prefix !~ /^__/) {
6843: # prefix that has a part already
6844: $keyroot=$prefix;
6845: } elsif (defined($prefix)) {
6846: # prefix that is missing a part
6847: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
6848: } else {
6849: # no prefix at all
6850: if (defined($part)) { $keyroot='_'.$part; }
6851: }
6852: return $keyroot;
6853: }
6854:
6855: # ---------------------------------------------------------------- Get metadata
6856:
6857: my %metaentry;
6858: sub metadata {
6859: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
6860: $uri=&declutter($uri);
6861: # if it is a non metadata possible uri return quickly
6862: if (($uri eq '') ||
6863: (($uri =~ m|^/*adm/|) &&
6864: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
6865: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) ) {
6866: return undef;
6867: }
6868: if (($uri =~ /^~/ || $uri =~ m{home/$match_username/public_html/})
6869: && &Apache::lonxml::get_state('target') =~ /^(|meta)$/) {
6870: return undef;
6871: }
6872: my $filename=$uri;
6873: $uri=~s/\.meta$//;
6874: #
6875: # Is the metadata already cached?
6876: # Look at timestamp of caching
6877: # Everything is cached by the main uri, libraries are never directly cached
6878: #
6879: if (!defined($liburi)) {
6880: my ($result,$cached)=&is_cached_new('meta',$uri);
6881: if (defined($cached)) { return $result->{':'.$what}; }
6882: }
6883: {
6884: #
6885: # Is this a recursive call for a library?
6886: #
6887: # if (! exists($metacache{$uri})) {
6888: # $metacache{$uri}={};
6889: # }
6890: my $cachetime = 60*60;
6891: if ($liburi) {
6892: $liburi=&declutter($liburi);
6893: $filename=$liburi;
6894: } else {
6895: &devalidate_cache_new('meta',$uri);
6896: undef(%metaentry);
6897: }
6898: my %metathesekeys=();
6899: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
6900: my $metastring;
6901: if ($uri =~ /^~/ || $uri =~ m{home/$match_username/public_html/}) {
6902: my $which = &hreflocation('','/'.($liburi || $uri));
6903: $metastring =
6904: &Apache::lonnet::ssi_body($which,
6905: ('grade_target' => 'meta'));
6906: $cachetime = 1; # only want this cached in the child not long term
6907: } elsif ($uri !~ m -^(editupload)/-) {
6908: my $file=&filelocation('',&clutter($filename));
6909: #push(@{$metaentry{$uri.'.file'}},$file);
6910: $metastring=&getfile($file);
6911: }
6912: my $parser=HTML::LCParser->new(\$metastring);
6913: my $token;
6914: undef %metathesekeys;
6915: while ($token=$parser->get_token) {
6916: if ($token->[0] eq 'S') {
6917: if (defined($token->[2]->{'package'})) {
6918: #
6919: # This is a package - get package info
6920: #
6921: my $package=$token->[2]->{'package'};
6922: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6923: if (defined($token->[2]->{'id'})) {
6924: $keyroot.='_'.$token->[2]->{'id'};
6925: }
6926: if ($metaentry{':packages'}) {
6927: $metaentry{':packages'}.=','.$package.$keyroot;
6928: } else {
6929: $metaentry{':packages'}=$package.$keyroot;
6930: }
6931: foreach my $pack_entry (keys(%packagetab)) {
6932: my $part=$keyroot;
6933: $part=~s/^\_//;
6934: if ($pack_entry=~/^\Q$package\E\&/ ||
6935: $pack_entry=~/^\Q$package\E_0\&/) {
6936: my ($pack,$name,$subp)=split(/\&/,$pack_entry);
6937: # ignore package.tab specified default values
6938: # here &package_tab_default() will fetch those
6939: if ($subp eq 'default') { next; }
6940: my $value=$packagetab{$pack_entry};
6941: my $unikey;
6942: if ($pack =~ /_0$/) {
6943: $unikey='parameter_0_'.$name;
6944: $part=0;
6945: } else {
6946: $unikey='parameter'.$keyroot.'_'.$name;
6947: }
6948: if ($subp eq 'display') {
6949: $value.=' [Part: '.$part.']';
6950: }
6951: $metaentry{':'.$unikey.'.part'}=$part;
6952: $metathesekeys{$unikey}=1;
6953: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6954: $metaentry{':'.$unikey.'.'.$subp}=$value;
6955: }
6956: if (defined($metaentry{':'.$unikey.'.default'})) {
6957: $metaentry{':'.$unikey}=
6958: $metaentry{':'.$unikey.'.default'};
6959: }
6960: }
6961: }
6962: } else {
6963: #
6964: # This is not a package - some other kind of start tag
6965: #
6966: my $entry=$token->[1];
6967: my $unikey;
6968: if ($entry eq 'import') {
6969: $unikey='';
6970: } else {
6971: $unikey=$entry;
6972: }
6973: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6974:
6975: if (defined($token->[2]->{'id'})) {
6976: $unikey.='_'.$token->[2]->{'id'};
6977: }
6978:
6979: if ($entry eq 'import') {
6980: #
6981: # Importing a library here
6982: #
6983: if ($depthcount<20) {
6984: my $location=$parser->get_text('/import');
6985: my $dir=$filename;
6986: $dir=~s|[^/]*$||;
6987: $location=&filelocation($dir,$location);
6988: my $metadata =
6989: &metadata($uri,'keys', $location,$unikey,
6990: $depthcount+1);
6991: foreach my $meta (split(',',$metadata)) {
6992: $metaentry{':'.$meta}=$metaentry{':'.$meta};
6993: $metathesekeys{$meta}=1;
6994: }
6995: }
6996: } else {
6997:
6998: if (defined($token->[2]->{'name'})) {
6999: $unikey.='_'.$token->[2]->{'name'};
7000: }
7001: $metathesekeys{$unikey}=1;
7002: foreach my $param (@{$token->[3]}) {
7003: $metaentry{':'.$unikey.'.'.$param} =
7004: $token->[2]->{$param};
7005: }
7006: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
7007: my $default=$metaentry{':'.$unikey.'.default'};
7008: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
7009: # only ws inside the tag, and not in default, so use default
7010: # as value
7011: $metaentry{':'.$unikey}=$default;
7012: } elsif ( $internaltext =~ /\S/ ) {
7013: # something interesting inside the tag
7014: $metaentry{':'.$unikey}=$internaltext;
7015: } else {
7016: # no interesting values, don't set a default
7017: }
7018: # end of not-a-package not-a-library import
7019: }
7020: # end of not-a-package start tag
7021: }
7022: # the next is the end of "start tag"
7023: }
7024: }
7025: my ($extension) = ($uri =~ /\.(\w+)$/);
7026: $extension = lc($extension);
7027: if ($extension eq 'htm') { $extension='html'; }
7028:
7029: foreach my $key (keys(%packagetab)) {
7030: #no specific packages #how's our extension
7031: if ($key!~/^extension_\Q$extension\E&/) { next; }
7032: &metadata_create_package_def($uri,$key,'extension_'.$extension,
7033: \%metathesekeys);
7034: }
7035:
7036: if (!exists($metaentry{':packages'})
7037: || $packagetab{"import_defaults&extension_$extension"}) {
7038: foreach my $key (keys(%packagetab)) {
7039: #no specific packages well let's get default then
7040: if ($key!~/^default&/) { next; }
7041: &metadata_create_package_def($uri,$key,'default',
7042: \%metathesekeys);
7043: }
7044: }
7045: # are there custom rights to evaluate
7046: if ($metaentry{':copyright'} eq 'custom') {
7047:
7048: #
7049: # Importing a rights file here
7050: #
7051: unless ($depthcount) {
7052: my $location=$metaentry{':customdistributionfile'};
7053: my $dir=$filename;
7054: $dir=~s|[^/]*$||;
7055: $location=&filelocation($dir,$location);
7056: my $rights_metadata =
7057: &metadata($uri,'keys',$location,'_rights',
7058: $depthcount+1);
7059: foreach my $rights (split(',',$rights_metadata)) {
7060: #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
7061: $metathesekeys{$rights}=1;
7062: }
7063: }
7064: }
7065: # uniqifiy package listing
7066: my %seen;
7067: my @uniq_packages =
7068: grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
7069: $metaentry{':packages'} = join(',',@uniq_packages);
7070:
7071: $metaentry{':keys'} = join(',',keys(%metathesekeys));
7072: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
7073: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
7074: &do_cache_new('meta',$uri,\%metaentry,$cachetime);
7075: # this is the end of "was not already recently cached
7076: }
7077: return $metaentry{':'.$what};
7078: }
7079:
7080: sub metadata_create_package_def {
7081: my ($uri,$key,$package,$metathesekeys)=@_;
7082: my ($pack,$name,$subp)=split(/\&/,$key);
7083: if ($subp eq 'default') { next; }
7084:
7085: if (defined($metaentry{':packages'})) {
7086: $metaentry{':packages'}.=','.$package;
7087: } else {
7088: $metaentry{':packages'}=$package;
7089: }
7090: my $value=$packagetab{$key};
7091: my $unikey;
7092: $unikey='parameter_0_'.$name;
7093: $metaentry{':'.$unikey.'.part'}=0;
7094: $$metathesekeys{$unikey}=1;
7095: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
7096: $metaentry{':'.$unikey.'.'.$subp}=$value;
7097: }
7098: if (defined($metaentry{':'.$unikey.'.default'})) {
7099: $metaentry{':'.$unikey}=
7100: $metaentry{':'.$unikey.'.default'};
7101: }
7102: }
7103:
7104: sub metadata_generate_part0 {
7105: my ($metadata,$metacache,$uri) = @_;
7106: my %allnames;
7107: foreach my $metakey (keys(%$metadata)) {
7108: if ($metakey=~/^parameter\_(.*)/) {
7109: my $part=$$metacache{':'.$metakey.'.part'};
7110: my $name=$$metacache{':'.$metakey.'.name'};
7111: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
7112: $allnames{$name}=$part;
7113: }
7114: }
7115: }
7116: foreach my $name (keys(%allnames)) {
7117: $$metadata{"parameter_0_$name"}=1;
7118: my $key=":parameter_0_$name";
7119: $$metacache{"$key.part"}='0';
7120: $$metacache{"$key.name"}=$name;
7121: $$metacache{"$key.type"}=$$metacache{':parameter_'.
7122: $allnames{$name}.'_'.$name.
7123: '.type'};
7124: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
7125: '.display'};
7126: my $expr='[Part: '.$allnames{$name}.']';
7127: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
7128: $$metacache{"$key.display"}=$olddis;
7129: }
7130: }
7131:
7132: # ------------------------------------------------------ Devalidate title cache
7133:
7134: sub devalidate_title_cache {
7135: my ($url)=@_;
7136: if (!$env{'request.course.id'}) { return; }
7137: my $symb=&symbread($url);
7138: if (!$symb) { return; }
7139: my $key=$env{'request.course.id'}."\0".$symb;
7140: &devalidate_cache_new('title',$key);
7141: }
7142:
7143: # ------------------------------------------------- Get the title of a resource
7144:
7145: sub gettitle {
7146: my $urlsymb=shift;
7147: my $symb=&symbread($urlsymb);
7148: if ($symb) {
7149: my $key=$env{'request.course.id'}."\0".$symb;
7150: my ($result,$cached)=&is_cached_new('title',$key);
7151: if (defined($cached)) {
7152: return $result;
7153: }
7154: my ($map,$resid,$url)=&decode_symb($symb);
7155: my $title='';
7156: if (!$map && $resid == 0 && $url =~/default\.sequence$/) {
7157: $title = $env{'course.'.$env{'request.course.id'}.'.description'};
7158: } else {
7159: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
7160: &GDBM_READER(),0640)) {
7161: my $mapid=$bighash{'map_pc_'.&clutter($map)};
7162: $title=$bighash{'title_'.$mapid.'.'.$resid};
7163: untie(%bighash);
7164: }
7165: }
7166: $title=~s/\&colon\;/\:/gs;
7167: if ($title) {
7168: return &do_cache_new('title',$key,$title,600);
7169: }
7170: $urlsymb=$url;
7171: }
7172: my $title=&metadata($urlsymb,'title');
7173: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
7174: return $title;
7175: }
7176:
7177: sub get_slot {
7178: my ($which,$cnum,$cdom)=@_;
7179: if (!$cnum || !$cdom) {
7180: (undef,my $courseid)=&whichuser();
7181: $cdom=$env{'course.'.$courseid.'.domain'};
7182: $cnum=$env{'course.'.$courseid.'.num'};
7183: }
7184: my $key=join("\0",'slots',$cdom,$cnum,$which);
7185: my %slotinfo;
7186: if (exists($remembered{$key})) {
7187: $slotinfo{$which} = $remembered{$key};
7188: } else {
7189: %slotinfo=&get('slots',[$which],$cdom,$cnum);
7190: &Apache::lonhomework::showhash(%slotinfo);
7191: my ($tmp)=keys(%slotinfo);
7192: if ($tmp=~/^error:/) { return (); }
7193: $remembered{$key} = $slotinfo{$which};
7194: }
7195: if (ref($slotinfo{$which}) eq 'HASH') {
7196: return %{$slotinfo{$which}};
7197: }
7198: return $slotinfo{$which};
7199: }
7200: # ------------------------------------------------- Update symbolic store links
7201:
7202: sub symblist {
7203: my ($mapname,%newhash)=@_;
7204: $mapname=&deversion(&declutter($mapname));
7205: my %hash;
7206: if (($env{'request.course.fn'}) && (%newhash)) {
7207: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
7208: &GDBM_WRCREAT(),0640)) {
7209: foreach my $url (keys %newhash) {
7210: next if ($url eq 'last_known'
7211: && $env{'form.no_update_last_known'});
7212: $hash{declutter($url)}=&encode_symb($mapname,
7213: $newhash{$url}->[1],
7214: $newhash{$url}->[0]);
7215: }
7216: if (untie(%hash)) {
7217: return 'ok';
7218: }
7219: }
7220: }
7221: return 'error';
7222: }
7223:
7224: # --------------------------------------------------------------- Verify a symb
7225:
7226: sub symbverify {
7227: my ($symb,$thisurl)=@_;
7228: my $thisfn=$thisurl;
7229: $thisfn=&declutter($thisfn);
7230: # direct jump to resource in page or to a sequence - will construct own symbs
7231: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
7232: # check URL part
7233: my ($map,$resid,$url)=&decode_symb($symb);
7234:
7235: unless ($url eq $thisfn) { return 0; }
7236:
7237: $symb=&symbclean($symb);
7238: $thisurl=&deversion($thisurl);
7239: $thisfn=&deversion($thisfn);
7240:
7241: my %bighash;
7242: my $okay=0;
7243:
7244: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
7245: &GDBM_READER(),0640)) {
7246: my $ids=$bighash{'ids_'.&clutter($thisurl)};
7247: unless ($ids) {
7248: $ids=$bighash{'ids_/'.$thisurl};
7249: }
7250: if ($ids) {
7251: # ------------------------------------------------------------------- Has ID(s)
7252: foreach my $id (split(/\,/,$ids)) {
7253: my ($mapid,$resid)=split(/\./,$id);
7254: if (
7255: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
7256: eq $symb) {
7257: if (($env{'request.role.adv'}) ||
7258: $bighash{'encrypted_'.$id} eq $env{'request.enc'}) {
7259: $okay=1;
7260: }
7261: }
7262: }
7263: }
7264: untie(%bighash);
7265: }
7266: return $okay;
7267: }
7268:
7269: # --------------------------------------------------------------- Clean-up symb
7270:
7271: sub symbclean {
7272: my $symb=shift;
7273: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
7274: # remove version from map
7275: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
7276:
7277: # remove version from URL
7278: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
7279:
7280: # remove wrapper
7281:
7282: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
7283: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
7284: return $symb;
7285: }
7286:
7287: # ---------------------------------------------- Split symb to find map and url
7288:
7289: sub encode_symb {
7290: my ($map,$resid,$url)=@_;
7291: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
7292: }
7293:
7294: sub decode_symb {
7295: my $symb=shift;
7296: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
7297: my ($map,$resid,$url)=split(/___/,$symb);
7298: return (&fixversion($map),$resid,&fixversion($url));
7299: }
7300:
7301: sub fixversion {
7302: my $fn=shift;
7303: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
7304: my %bighash;
7305: my $uri=&clutter($fn);
7306: my $key=$env{'request.course.id'}.'_'.$uri;
7307: # is this cached?
7308: my ($result,$cached)=&is_cached_new('courseresversion',$key);
7309: if (defined($cached)) { return $result; }
7310: # unfortunately not cached, or expired
7311: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
7312: &GDBM_READER(),0640)) {
7313: if ($bighash{'version_'.$uri}) {
7314: my $version=$bighash{'version_'.$uri};
7315: unless (($version eq 'mostrecent') ||
7316: ($version==&getversion($uri))) {
7317: $uri=~s/\.(\w+)$/\.$version\.$1/;
7318: }
7319: }
7320: untie %bighash;
7321: }
7322: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
7323: }
7324:
7325: sub deversion {
7326: my $url=shift;
7327: $url=~s/\.\d+\.(\w+)$/\.$1/;
7328: return $url;
7329: }
7330:
7331: # ------------------------------------------------------ Return symb list entry
7332:
7333: sub symbread {
7334: my ($thisfn,$donotrecurse)=@_;
7335: my $cache_str='request.symbread.cached.'.$thisfn;
7336: if (defined($env{$cache_str})) { return $env{$cache_str}; }
7337: # no filename provided? try from environment
7338: unless ($thisfn) {
7339: if ($env{'request.symb'}) {
7340: return $env{$cache_str}=&symbclean($env{'request.symb'});
7341: }
7342: $thisfn=$env{'request.filename'};
7343: }
7344: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7345: # is that filename actually a symb? Verify, clean, and return
7346: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
7347: if (&symbverify($thisfn,$1)) {
7348: return $env{$cache_str}=&symbclean($thisfn);
7349: }
7350: }
7351: $thisfn=declutter($thisfn);
7352: my %hash;
7353: my %bighash;
7354: my $syval='';
7355: if (($env{'request.course.fn'}) && ($thisfn)) {
7356: my $targetfn = $thisfn;
7357: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
7358: $targetfn = 'adm/wrapper/'.$thisfn;
7359: }
7360: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
7361: $targetfn=$1;
7362: }
7363: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
7364: &GDBM_READER(),0640)) {
7365: $syval=$hash{$targetfn};
7366: untie(%hash);
7367: }
7368: # ---------------------------------------------------------- There was an entry
7369: if ($syval) {
7370: #unless ($syval=~/\_\d+$/) {
7371: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
7372: #&appenv('request.ambiguous' => $thisfn);
7373: #return $env{$cache_str}='';
7374: #}
7375: #$syval.=$1;
7376: #}
7377: } else {
7378: # ------------------------------------------------------- Was not in symb table
7379: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
7380: &GDBM_READER(),0640)) {
7381: # ---------------------------------------------- Get ID(s) for current resource
7382: my $ids=$bighash{'ids_'.&clutter($thisfn)};
7383: unless ($ids) {
7384: $ids=$bighash{'ids_/'.$thisfn};
7385: }
7386: unless ($ids) {
7387: # alias?
7388: $ids=$bighash{'mapalias_'.$thisfn};
7389: }
7390: if ($ids) {
7391: # ------------------------------------------------------------------- Has ID(s)
7392: my @possibilities=split(/\,/,$ids);
7393: if ($#possibilities==0) {
7394: # ----------------------------------------------- There is only one possibility
7395: my ($mapid,$resid)=split(/\./,$ids);
7396: $syval=&encode_symb($bighash{'map_id_'.$mapid},
7397: $resid,$thisfn);
7398: } elsif (!$donotrecurse) {
7399: # ------------------------------------------ There is more than one possibility
7400: my $realpossible=0;
7401: foreach my $id (@possibilities) {
7402: my $file=$bighash{'src_'.$id};
7403: if (&allowed('bre',$file)) {
7404: my ($mapid,$resid)=split(/\./,$id);
7405: if ($bighash{'map_type_'.$mapid} ne 'page') {
7406: $realpossible++;
7407: $syval=&encode_symb($bighash{'map_id_'.$mapid},
7408: $resid,$thisfn);
7409: }
7410: }
7411: }
7412: if ($realpossible!=1) { $syval=''; }
7413: } else {
7414: $syval='';
7415: }
7416: }
7417: untie(%bighash)
7418: }
7419: }
7420: if ($syval) {
7421: return $env{$cache_str}=$syval;
7422: }
7423: }
7424: &appenv('request.ambiguous' => $thisfn);
7425: return $env{$cache_str}='';
7426: }
7427:
7428: # ---------------------------------------------------------- Return random seed
7429:
7430: sub numval {
7431: my $txt=shift;
7432: $txt=~tr/A-J/0-9/;
7433: $txt=~tr/a-j/0-9/;
7434: $txt=~tr/K-T/0-9/;
7435: $txt=~tr/k-t/0-9/;
7436: $txt=~tr/U-Z/0-5/;
7437: $txt=~tr/u-z/0-5/;
7438: $txt=~s/\D//g;
7439: if ($_64bit) { if ($txt > 2**32) { return -1; } }
7440: return int($txt);
7441: }
7442:
7443: sub numval2 {
7444: my $txt=shift;
7445: $txt=~tr/A-J/0-9/;
7446: $txt=~tr/a-j/0-9/;
7447: $txt=~tr/K-T/0-9/;
7448: $txt=~tr/k-t/0-9/;
7449: $txt=~tr/U-Z/0-5/;
7450: $txt=~tr/u-z/0-5/;
7451: $txt=~s/\D//g;
7452: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
7453: my $total;
7454: foreach my $val (@txts) { $total+=$val; }
7455: if ($_64bit) { if ($total > 2**32) { return -1; } }
7456: return int($total);
7457: }
7458:
7459: sub numval3 {
7460: use integer;
7461: my $txt=shift;
7462: $txt=~tr/A-J/0-9/;
7463: $txt=~tr/a-j/0-9/;
7464: $txt=~tr/K-T/0-9/;
7465: $txt=~tr/k-t/0-9/;
7466: $txt=~tr/U-Z/0-5/;
7467: $txt=~tr/u-z/0-5/;
7468: $txt=~s/\D//g;
7469: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
7470: my $total;
7471: foreach my $val (@txts) { $total+=$val; }
7472: if ($_64bit) { $total=(($total<<32)>>32); }
7473: return $total;
7474: }
7475:
7476: sub digest {
7477: my ($data)=@_;
7478: my $digest=&Digest::MD5::md5($data);
7479: my ($a,$b,$c,$d)=unpack("iiii",$digest);
7480: my ($e,$f);
7481: {
7482: use integer;
7483: $e=($a+$b);
7484: $f=($c+$d);
7485: if ($_64bit) {
7486: $e=(($e<<32)>>32);
7487: $f=(($f<<32)>>32);
7488: }
7489: }
7490: if (wantarray) {
7491: return ($e,$f);
7492: } else {
7493: my $g;
7494: {
7495: use integer;
7496: $g=($e+$f);
7497: if ($_64bit) {
7498: $g=(($g<<32)>>32);
7499: }
7500: }
7501: return $g;
7502: }
7503: }
7504:
7505: sub latest_rnd_algorithm_id {
7506: return '64bit5';
7507: }
7508:
7509: sub get_rand_alg {
7510: my ($courseid)=@_;
7511: if (!$courseid) { $courseid=(&whichuser())[1]; }
7512: if ($courseid) {
7513: return $env{"course.$courseid.rndseed"};
7514: }
7515: return &latest_rnd_algorithm_id();
7516: }
7517:
7518: sub validCODE {
7519: my ($CODE)=@_;
7520: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
7521: return 0;
7522: }
7523:
7524: sub getCODE {
7525: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
7526: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
7527: defined($Apache::lonhomework::parsing_a_task) ) &&
7528: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
7529: return $Apache::lonhomework::history{'resource.CODE'};
7530: }
7531: return undef;
7532: }
7533:
7534: sub rndseed {
7535: my ($symb,$courseid,$domain,$username)=@_;
7536: my ($wsymb,$wcourseid,$wdomain,$wusername)=&whichuser();
7537: if (!defined($symb)) {
7538: unless ($symb=$wsymb) { return time; }
7539: }
7540: if (!$courseid) { $courseid=$wcourseid; }
7541: if (!$domain) { $domain=$wdomain; }
7542: if (!$username) { $username=$wusername }
7543: my $which=&get_rand_alg();
7544:
7545: if (defined(&getCODE())) {
7546: if ($which eq '64bit5') {
7547: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
7548: } elsif ($which eq '64bit4') {
7549: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
7550: } else {
7551: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
7552: }
7553: } elsif ($which eq '64bit5') {
7554: return &rndseed_64bit5($symb,$courseid,$domain,$username);
7555: } elsif ($which eq '64bit4') {
7556: return &rndseed_64bit4($symb,$courseid,$domain,$username);
7557: } elsif ($which eq '64bit3') {
7558: return &rndseed_64bit3($symb,$courseid,$domain,$username);
7559: } elsif ($which eq '64bit2') {
7560: return &rndseed_64bit2($symb,$courseid,$domain,$username);
7561: } elsif ($which eq '64bit') {
7562: return &rndseed_64bit($symb,$courseid,$domain,$username);
7563: }
7564: return &rndseed_32bit($symb,$courseid,$domain,$username);
7565: }
7566:
7567: sub rndseed_32bit {
7568: my ($symb,$courseid,$domain,$username)=@_;
7569: {
7570: use integer;
7571: my $symbchck=unpack("%32C*",$symb) << 27;
7572: my $symbseed=numval($symb) << 22;
7573: my $namechck=unpack("%32C*",$username) << 17;
7574: my $nameseed=numval($username) << 12;
7575: my $domainseed=unpack("%32C*",$domain) << 7;
7576: my $courseseed=unpack("%32C*",$courseid);
7577: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
7578: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7579: #&logthis("rndseed :$num:$symb");
7580: if ($_64bit) { $num=(($num<<32)>>32); }
7581: return $num;
7582: }
7583: }
7584:
7585: sub rndseed_64bit {
7586: my ($symb,$courseid,$domain,$username)=@_;
7587: {
7588: use integer;
7589: my $symbchck=unpack("%32S*",$symb) << 21;
7590: my $symbseed=numval($symb) << 10;
7591: my $namechck=unpack("%32S*",$username);
7592:
7593: my $nameseed=numval($username) << 21;
7594: my $domainseed=unpack("%32S*",$domain) << 10;
7595: my $courseseed=unpack("%32S*",$courseid);
7596:
7597: my $num1=$symbchck+$symbseed+$namechck;
7598: my $num2=$nameseed+$domainseed+$courseseed;
7599: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7600: #&logthis("rndseed :$num:$symb");
7601: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7602: return "$num1,$num2";
7603: }
7604: }
7605:
7606: sub rndseed_64bit2 {
7607: my ($symb,$courseid,$domain,$username)=@_;
7608: {
7609: use integer;
7610: # strings need to be an even # of cahracters long, it it is odd the
7611: # last characters gets thrown away
7612: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7613: my $symbseed=numval($symb) << 10;
7614: my $namechck=unpack("%32S*",$username.' ');
7615:
7616: my $nameseed=numval($username) << 21;
7617: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7618: my $courseseed=unpack("%32S*",$courseid.' ');
7619:
7620: my $num1=$symbchck+$symbseed+$namechck;
7621: my $num2=$nameseed+$domainseed+$courseseed;
7622: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7623: #&logthis("rndseed :$num:$symb");
7624: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7625: return "$num1,$num2";
7626: }
7627: }
7628:
7629: sub rndseed_64bit3 {
7630: my ($symb,$courseid,$domain,$username)=@_;
7631: {
7632: use integer;
7633: # strings need to be an even # of cahracters long, it it is odd the
7634: # last characters gets thrown away
7635: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7636: my $symbseed=numval2($symb) << 10;
7637: my $namechck=unpack("%32S*",$username.' ');
7638:
7639: my $nameseed=numval2($username) << 21;
7640: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7641: my $courseseed=unpack("%32S*",$courseid.' ');
7642:
7643: my $num1=$symbchck+$symbseed+$namechck;
7644: my $num2=$nameseed+$domainseed+$courseseed;
7645: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7646: #&logthis("rndseed :$num1:$num2:$_64bit");
7647: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7648:
7649: return "$num1:$num2";
7650: }
7651: }
7652:
7653: sub rndseed_64bit4 {
7654: my ($symb,$courseid,$domain,$username)=@_;
7655: {
7656: use integer;
7657: # strings need to be an even # of cahracters long, it it is odd the
7658: # last characters gets thrown away
7659: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7660: my $symbseed=numval3($symb) << 10;
7661: my $namechck=unpack("%32S*",$username.' ');
7662:
7663: my $nameseed=numval3($username) << 21;
7664: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7665: my $courseseed=unpack("%32S*",$courseid.' ');
7666:
7667: my $num1=$symbchck+$symbseed+$namechck;
7668: my $num2=$nameseed+$domainseed+$courseseed;
7669: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7670: #&logthis("rndseed :$num1:$num2:$_64bit");
7671: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7672:
7673: return "$num1:$num2";
7674: }
7675: }
7676:
7677: sub rndseed_64bit5 {
7678: my ($symb,$courseid,$domain,$username)=@_;
7679: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
7680: return "$num1:$num2";
7681: }
7682:
7683: sub rndseed_CODE_64bit {
7684: my ($symb,$courseid,$domain,$username)=@_;
7685: {
7686: use integer;
7687: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7688: my $symbseed=numval2($symb);
7689: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7690: my $CODEseed=numval(&getCODE());
7691: my $courseseed=unpack("%32S*",$courseid.' ');
7692: my $num1=$symbseed+$CODEchck;
7693: my $num2=$CODEseed+$courseseed+$symbchck;
7694: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7695: #&logthis("rndseed :$num1:$num2:$symb");
7696: if ($_64bit) { $num1=(($num1<<32)>>32); }
7697: if ($_64bit) { $num2=(($num2<<32)>>32); }
7698: return "$num1:$num2";
7699: }
7700: }
7701:
7702: sub rndseed_CODE_64bit4 {
7703: my ($symb,$courseid,$domain,$username)=@_;
7704: {
7705: use integer;
7706: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7707: my $symbseed=numval3($symb);
7708: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7709: my $CODEseed=numval3(&getCODE());
7710: my $courseseed=unpack("%32S*",$courseid.' ');
7711: my $num1=$symbseed+$CODEchck;
7712: my $num2=$CODEseed+$courseseed+$symbchck;
7713: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7714: #&logthis("rndseed :$num1:$num2:$symb");
7715: if ($_64bit) { $num1=(($num1<<32)>>32); }
7716: if ($_64bit) { $num2=(($num2<<32)>>32); }
7717: return "$num1:$num2";
7718: }
7719: }
7720:
7721: sub rndseed_CODE_64bit5 {
7722: my ($symb,$courseid,$domain,$username)=@_;
7723: my $code = &getCODE();
7724: my ($num1,$num2)=&digest("$symb,$courseid,$code");
7725: return "$num1:$num2";
7726: }
7727:
7728: sub setup_random_from_rndseed {
7729: my ($rndseed)=@_;
7730: if ($rndseed =~/([,:])/) {
7731: my ($num1,$num2)=split(/[,:]/,$rndseed);
7732: &Math::Random::random_set_seed(abs($num1),abs($num2));
7733: } else {
7734: &Math::Random::random_set_seed_from_phrase($rndseed);
7735: }
7736: }
7737:
7738: sub latest_receipt_algorithm_id {
7739: return 'receipt3';
7740: }
7741:
7742: sub recunique {
7743: my $fucourseid=shift;
7744: my $unique;
7745: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
7746: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7747: $unique=$env{"course.$fucourseid.internal.encseed"};
7748: } else {
7749: $unique=$perlvar{'lonReceipt'};
7750: }
7751: return unpack("%32C*",$unique);
7752: }
7753:
7754: sub recprefix {
7755: my $fucourseid=shift;
7756: my $prefix;
7757: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2'||
7758: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7759: $prefix=$env{"course.$fucourseid.internal.encpref"};
7760: } else {
7761: $prefix=$perlvar{'lonHostID'};
7762: }
7763: return unpack("%32C*",$prefix);
7764: }
7765:
7766: sub ireceipt {
7767: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
7768:
7769: my $return =&recprefix($fucourseid).'-';
7770:
7771: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt3' ||
7772: $env{'request.state'} eq 'construct') {
7773: $return .= (&digest("$funame,$fudom,$fucourseid,$fusymb,$part")%10000);
7774: return $return;
7775: }
7776:
7777: my $cuname=unpack("%32C*",$funame);
7778: my $cudom=unpack("%32C*",$fudom);
7779: my $cucourseid=unpack("%32C*",$fucourseid);
7780: my $cusymb=unpack("%32C*",$fusymb);
7781: my $cunique=&recunique($fucourseid);
7782: my $cpart=unpack("%32S*",$part);
7783: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
7784:
7785: #&logthis("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname)." and ".($cpart%$cudom));
7786:
7787: $return.= ($cunique%$cuname+
7788: $cunique%$cudom+
7789: $cusymb%$cuname+
7790: $cusymb%$cudom+
7791: $cucourseid%$cuname+
7792: $cucourseid%$cudom+
7793: $cpart%$cuname+
7794: $cpart%$cudom);
7795: } else {
7796: $return.= ($cunique%$cuname+
7797: $cunique%$cudom+
7798: $cusymb%$cuname+
7799: $cusymb%$cudom+
7800: $cucourseid%$cuname+
7801: $cucourseid%$cudom);
7802: }
7803: return $return;
7804: }
7805:
7806: sub receipt {
7807: my ($part)=@_;
7808: my ($symb,$courseid,$domain,$name) = &whichuser();
7809: return &ireceipt($name,$domain,$courseid,$symb,$part);
7810: }
7811:
7812: sub whichuser {
7813: my ($passedsymb)=@_;
7814: my ($symb,$courseid,$domain,$name,$publicuser);
7815: if (defined($env{'form.grade_symb'})) {
7816: my ($tmp_courseid)=&get_env_multiple('form.grade_courseid');
7817: my $allowed=&allowed('vgr',$tmp_courseid);
7818: if (!$allowed &&
7819: exists($env{'request.course.sec'}) &&
7820: $env{'request.course.sec'} !~ /^\s*$/) {
7821: $allowed=&allowed('vgr',$tmp_courseid.
7822: '/'.$env{'request.course.sec'});
7823: }
7824: if ($allowed) {
7825: ($symb)=&get_env_multiple('form.grade_symb');
7826: $courseid=$tmp_courseid;
7827: ($domain)=&get_env_multiple('form.grade_domain');
7828: ($name)=&get_env_multiple('form.grade_username');
7829: return ($symb,$courseid,$domain,$name,$publicuser);
7830: }
7831: }
7832: if (!$passedsymb) {
7833: $symb=&symbread();
7834: } else {
7835: $symb=$passedsymb;
7836: }
7837: $courseid=$env{'request.course.id'};
7838: $domain=$env{'user.domain'};
7839: $name=$env{'user.name'};
7840: if ($name eq 'public' && $domain eq 'public') {
7841: if (!defined($env{'form.username'})) {
7842: $env{'form.username'}.=time.rand(10000000);
7843: }
7844: $name.=$env{'form.username'};
7845: }
7846: return ($symb,$courseid,$domain,$name,$publicuser);
7847:
7848: }
7849:
7850: # ------------------------------------------------------------ Serves up a file
7851: # returns either the contents of the file or
7852: # -1 if the file doesn't exist
7853: #
7854: # if the target is a file that was uploaded via DOCS,
7855: # a check will be made to see if a current copy exists on the local server,
7856: # if it does this will be served, otherwise a copy will be retrieved from
7857: # the home server for the course and stored in /home/httpd/html/userfiles on
7858: # the local server.
7859:
7860: sub getfile {
7861: my ($file) = @_;
7862: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7863: &repcopy($file);
7864: return &readfile($file);
7865: }
7866:
7867: sub repcopy_userfile {
7868: my ($file)=@_;
7869: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7870: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
7871: my ($cdom,$cnum,$filename) =
7872: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+($match_domain)/+($match_name)/+(.*)|);
7873: my $uri="/uploaded/$cdom/$cnum/$filename";
7874: if (-e "$file") {
7875: # we already have a local copy, check it out
7876: my @fileinfo = stat($file);
7877: my $rtncode;
7878: my $info;
7879: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
7880: if ($lwpresp ne 'ok') {
7881: # there is no such file anymore, even though we had a local copy
7882: if ($rtncode eq '404') {
7883: unlink($file);
7884: }
7885: return -1;
7886: }
7887: if ($info < $fileinfo[9]) {
7888: # nice, the file we have is up-to-date, just say okay
7889: return 'ok';
7890: } else {
7891: # the file is outdated, get rid of it
7892: unlink($file);
7893: }
7894: }
7895: # one way or the other, at this point, we don't have the file
7896: # construct the correct path for the file
7897: my @parts = ($cdom,$cnum);
7898: if ($filename =~ m|^(.+)/[^/]+$|) {
7899: push @parts, split(/\//,$1);
7900: }
7901: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
7902: foreach my $part (@parts) {
7903: $path .= '/'.$part;
7904: if (!-e $path) {
7905: mkdir($path,0770);
7906: }
7907: }
7908: # now the path exists for sure
7909: # get a user agent
7910: my $ua=new LWP::UserAgent;
7911: my $transferfile=$file.'.in.transfer';
7912: # FIXME: this should flock
7913: if (-e $transferfile) { return 'ok'; }
7914: my $request;
7915: $uri=~s/^\///;
7916: $request=new HTTP::Request('GET','http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri);
7917: my $response=$ua->request($request,$transferfile);
7918: # did it work?
7919: if ($response->is_error()) {
7920: unlink($transferfile);
7921: &logthis("Userfile repcopy failed for $uri");
7922: return -1;
7923: }
7924: # worked, rename the transfer file
7925: rename($transferfile,$file);
7926: return 'ok';
7927: }
7928:
7929: sub tokenwrapper {
7930: my $uri=shift;
7931: $uri=~s|^http\://([^/]+)||;
7932: $uri=~s|^/||;
7933: $env{'user.environment'}=~/\/([^\/]+)\.id/;
7934: my $token=$1;
7935: my (undef,$udom,$uname,$file)=split('/',$uri,4);
7936: if ($udom && $uname && $file) {
7937: $file=~s|(\?\.*)*$||;
7938: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
7939: return 'http://'.&hostname(&homeserver($uname,$udom)).'/'.$uri.
7940: (($uri=~/\?/)?'&':'?').'token='.$token.
7941: '&tokenissued='.$perlvar{'lonHostID'};
7942: } else {
7943: return '/adm/notfound.html';
7944: }
7945: }
7946:
7947: # call with reqtype HEAD: get last modification time
7948: # call with reqtype GET: get the file contents
7949: # Do not call this with reqtype GET for large files! It loads everything into memory
7950: #
7951: sub getuploaded {
7952: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
7953: $uri=~s/^\///;
7954: $uri = 'http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri;
7955: my $ua=new LWP::UserAgent;
7956: my $request=new HTTP::Request($reqtype,$uri);
7957: my $response=$ua->request($request);
7958: $$rtncode = $response->code;
7959: if (! $response->is_success()) {
7960: return 'failed';
7961: }
7962: if ($reqtype eq 'HEAD') {
7963: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
7964: } elsif ($reqtype eq 'GET') {
7965: $$info = $response->content;
7966: }
7967: return 'ok';
7968: }
7969:
7970: sub readfile {
7971: my $file = shift;
7972: if ( (! -e $file ) || ($file eq '') ) { return -1; };
7973: my $fh;
7974: open($fh,"<$file");
7975: my $a='';
7976: while (my $line = <$fh>) { $a .= $line; }
7977: return $a;
7978: }
7979:
7980: sub filelocation {
7981: my ($dir,$file) = @_;
7982: my $location;
7983: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
7984:
7985: if ($file =~ m-^/adm/-) {
7986: $file=~s-^/adm/wrapper/-/-;
7987: $file=~s-^/adm/coursedocs/showdoc/-/-;
7988: }
7989:
7990: if ($file=~m:^/~:) { # is a contruction space reference
7991: $location = $file;
7992: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
7993: } elsif ($file=~m{^/home/$match_username/public_html/}) {
7994: # is a correct contruction space reference
7995: $location = $file;
7996: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
7997: my ($udom,$uname,$filename)=
7998: ($file=~m -^/+(?:uploaded|editupload)/+($match_domain)/+($match_name)/+(.*)$-);
7999: my $home=&homeserver($uname,$udom);
8000: my $is_me=0;
8001: my @ids=¤t_machine_ids();
8002: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
8003: if ($is_me) {
8004: $location=&propath($udom,$uname).
8005: '/userfiles/'.$filename;
8006: } else {
8007: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
8008: $udom.'/'.$uname.'/'.$filename;
8009: }
8010: } elsif ($file =~ m-^/adm/-) {
8011: $location = $perlvar{'lonDocRoot'}.'/'.$file;
8012: } else {
8013: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
8014: $file=~s:^/res/:/:;
8015: if ( !( $file =~ m:^/:) ) {
8016: $location = $dir. '/'.$file;
8017: } else {
8018: $location = '/home/httpd/html/res'.$file;
8019: }
8020: }
8021: $location=~s://+:/:g; # remove duplicate /
8022: while ($location=~m{/\.\./}) {
8023: if ($location =~ m{/[^/]+/\.\./}) {
8024: $location=~ s{/[^/]+/\.\./}{/}g;
8025: } else {
8026: $location=~ s{/\.\./}{/}g;
8027: }
8028: } #remove dir/..
8029: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
8030: return $location;
8031: }
8032:
8033: sub hreflocation {
8034: my ($dir,$file)=@_;
8035: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
8036: $file=filelocation($dir,$file);
8037: } elsif ($file=~m-^/adm/-) {
8038: $file=~s-^/adm/wrapper/-/-;
8039: $file=~s-^/adm/coursedocs/showdoc/-/-;
8040: }
8041: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
8042: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
8043: } elsif ($file=~m-/home/($match_username)/public_html/-) {
8044: $file=~s-^/home/($match_username)/public_html/-/~$1/-;
8045: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
8046: $file=~s-^/home/httpd/lonUsers/($match_domain)/./././($match_name)/userfiles/
8047: -/uploaded/$1/$2/-x;
8048: }
8049: if ($file=~ m{^/userfiles/}) {
8050: $file =~ s{^/userfiles/}{/uploaded/};
8051: }
8052: return $file;
8053: }
8054:
8055: sub current_machine_domains {
8056: return &machine_domains(&hostname($perlvar{'lonHostID'}));
8057: }
8058:
8059: sub machine_domains {
8060: my ($hostname) = @_;
8061: my @domains;
8062: my %hostname = &all_hostnames();
8063: while( my($id, $name) = each(%hostname)) {
8064: # &logthis("-$id-$name-$hostname-");
8065: if ($hostname eq $name) {
8066: push(@domains,&host_domain($id));
8067: }
8068: }
8069: return @domains;
8070: }
8071:
8072: sub current_machine_ids {
8073: return &machine_ids(&hostname($perlvar{'lonHostID'}));
8074: }
8075:
8076: sub machine_ids {
8077: my ($hostname) = @_;
8078: $hostname ||= &hostname($perlvar{'lonHostID'});
8079: my @ids;
8080: my %name_to_host = &all_names();
8081: if (ref($name_to_host{$hostname}) eq 'ARRAY') {
8082: return @{ $name_to_host{$hostname} };
8083: }
8084: return;
8085: }
8086:
8087: sub additional_machine_domains {
8088: my @domains;
8089: open(my $fh,"<$perlvar{'lonTabDir'}/expected_domains.tab");
8090: while( my $line = <$fh>) {
8091: $line =~ s/\s//g;
8092: push(@domains,$line);
8093: }
8094: return @domains;
8095: }
8096:
8097: sub default_login_domain {
8098: my $domain = $perlvar{'lonDefDomain'};
8099: my $testdomain=(split(/\./,$ENV{'HTTP_HOST'}))[0];
8100: foreach my $posdom (¤t_machine_domains(),
8101: &additional_machine_domains()) {
8102: if (lc($posdom) eq lc($testdomain)) {
8103: $domain=$posdom;
8104: last;
8105: }
8106: }
8107: return $domain;
8108: }
8109:
8110: # ------------------------------------------------------------- Declutters URLs
8111:
8112: sub declutter {
8113: my $thisfn=shift;
8114: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
8115: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
8116: $thisfn=~s/^\///;
8117: $thisfn=~s|^adm/wrapper/||;
8118: $thisfn=~s|^adm/coursedocs/showdoc/||;
8119: $thisfn=~s/^res\///;
8120: $thisfn=~s/\?.+$//;
8121: return $thisfn;
8122: }
8123:
8124: # ------------------------------------------------------------- Clutter up URLs
8125:
8126: sub clutter {
8127: my $thisfn='/'.&declutter(shift);
8128: if ($thisfn !~ m{^/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)/}
8129: || $thisfn =~ m{^/adm/(includes|pages)} ) {
8130: $thisfn='/res'.$thisfn;
8131: }
8132: if ($thisfn !~m|/adm|) {
8133: if ($thisfn =~ m|/ext/|) {
8134: $thisfn='/adm/wrapper'.$thisfn;
8135: } else {
8136: my ($ext) = ($thisfn =~ /\.(\w+)$/);
8137: my $embstyle=&Apache::loncommon::fileembstyle($ext);
8138: if ($embstyle eq 'ssi'
8139: || ($embstyle eq 'hdn')
8140: || ($embstyle eq 'rat')
8141: || ($embstyle eq 'prv')
8142: || ($embstyle eq 'ign')) {
8143: #do nothing with these
8144: } elsif (($embstyle eq 'img')
8145: || ($embstyle eq 'emb')
8146: || ($embstyle eq 'wrp')) {
8147: $thisfn='/adm/wrapper'.$thisfn;
8148: } elsif ($embstyle eq 'unk'
8149: && $thisfn!~/\.(sequence|page)$/) {
8150: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
8151: } else {
8152: # &logthis("Got a blank emb style");
8153: }
8154: }
8155: }
8156: return $thisfn;
8157: }
8158:
8159: sub clutter_with_no_wrapper {
8160: my $uri = &clutter(shift);
8161: if ($uri =~ m-^/adm/-) {
8162: $uri =~ s-^/adm/wrapper/-/-;
8163: $uri =~ s-^/adm/coursedocs/showdoc/-/-;
8164: }
8165: return $uri;
8166: }
8167:
8168: sub freeze_escape {
8169: my ($value)=@_;
8170: if (ref($value)) {
8171: $value=&nfreeze($value);
8172: return '__FROZEN__'.&escape($value);
8173: }
8174: return &escape($value);
8175: }
8176:
8177:
8178: sub thaw_unescape {
8179: my ($value)=@_;
8180: if ($value =~ /^__FROZEN__/) {
8181: substr($value,0,10,undef);
8182: $value=&unescape($value);
8183: return &thaw($value);
8184: }
8185: return &unescape($value);
8186: }
8187:
8188: sub correct_line_ends {
8189: my ($result)=@_;
8190: $$result =~s/\r\n/\n/mg;
8191: $$result =~s/\r/\n/mg;
8192: }
8193: # ================================================================ Main Program
8194:
8195: sub goodbye {
8196: &logthis("Starting Shut down");
8197: #not converted to using infrastruture and probably shouldn't be
8198: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&nfreeze(\%badServerCache))));
8199: #converted
8200: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
8201: &logthis(sprintf("%-20s is %s",'%homecache',length(&nfreeze(\%homecache))));
8202: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&nfreeze(\%titlecache))));
8203: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&nfreeze(\%courseresdatacache))));
8204: #1.1 only
8205: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&nfreeze(\%userresdatacache))));
8206: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&nfreeze(\%getsectioncache))));
8207: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&nfreeze(\%courseresversioncache))));
8208: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&nfreeze(\%resversioncache))));
8209: &logthis(sprintf("%-20s is %s",'%remembered',length(&nfreeze(\%remembered))));
8210: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
8211: &logthis(sprintf("%-20s is %s",'hits',$hits));
8212: &flushcourselogs();
8213: &logthis("Shutting down");
8214: }
8215:
8216: sub get_dns {
8217: my ($url,$func,$ignore_cache) = @_;
8218: if (!$ignore_cache) {
8219: my ($content,$cached)=
8220: &Apache::lonnet::is_cached_new('dns',$url);
8221: if ($cached) {
8222: &$func($content);
8223: return;
8224: }
8225: }
8226:
8227: my %alldns;
8228: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
8229: foreach my $dns (<$config>) {
8230: next if ($dns !~ /^\^(\S*)/x);
8231: $alldns{$1} = 1;
8232: }
8233: while (%alldns) {
8234: my ($dns) = keys(%alldns);
8235: delete($alldns{$dns});
8236: my $ua=new LWP::UserAgent;
8237: my $request=new HTTP::Request('GET',"http://$dns$url");
8238: my $response=$ua->request($request);
8239: next if ($response->is_error());
8240: my @content = split("\n",$response->content);
8241: &Apache::lonnet::do_cache_new('dns',$url,\@content,30*24*60*60);
8242: &$func(\@content);
8243: return;
8244: }
8245: close($config);
8246: my $which = (split('/',$url))[3];
8247: &logthis("unable to contact DNS defaulting to on disk file dns_$which.tab\n");
8248: open($config,"<$perlvar{'lonTabDir'}/dns_$which.tab");
8249: my @content = <$config>;
8250: &$func(\@content);
8251: return;
8252: }
8253: # ------------------------------------------------------------ Read domain file
8254: {
8255: my $loaded;
8256: my %domain;
8257:
8258: sub parse_domain_tab {
8259: my ($lines) = @_;
8260: foreach my $line (@$lines) {
8261: next if ($line =~ /^(\#|\s*$ )/x);
8262:
8263: chomp($line);
8264: my ($name,@elements) = split(/:/,$line,9);
8265: my %this_domain;
8266: foreach my $field ('description', 'auth_def', 'auth_arg_def',
8267: 'lang_def', 'city', 'longi', 'lati',
8268: 'primary') {
8269: $this_domain{$field} = shift(@elements);
8270: }
8271: $domain{$name} = \%this_domain;
8272: }
8273: }
8274:
8275: sub reset_domain_info {
8276: undef($loaded);
8277: undef(%domain);
8278: }
8279:
8280: sub load_domain_tab {
8281: my ($ignore_cache) = @_;
8282: &get_dns('/adm/dns/domain',\&parse_domain_tab,$ignore_cache);
8283: my $fh;
8284: if (open($fh,"<".$perlvar{'lonTabDir'}.'/domain.tab')) {
8285: my @lines = <$fh>;
8286: &parse_domain_tab(\@lines);
8287: }
8288: close($fh);
8289: $loaded = 1;
8290: }
8291:
8292: sub domain {
8293: &load_domain_tab() if (!$loaded);
8294:
8295: my ($name,$what) = @_;
8296: return if ( !exists($domain{$name}) );
8297:
8298: if (!$what) {
8299: return $domain{$name}{'description'};
8300: }
8301: return $domain{$name}{$what};
8302: }
8303: }
8304:
8305:
8306: # ------------------------------------------------------------- Read hosts file
8307: {
8308: my %hostname;
8309: my %hostdom;
8310: my %libserv;
8311: my $loaded;
8312: my %name_to_host;
8313:
8314: sub parse_hosts_tab {
8315: my ($file) = @_;
8316: foreach my $configline (@$file) {
8317: next if ($configline =~ /^(\#|\s*$ )/x);
8318: next if ($configline =~ /^\^/);
8319: chomp($configline);
8320: my ($id,$domain,$role,$name)=split(/:/,$configline);
8321: $name=~s/\s//g;
8322: if ($id && $domain && $role && $name) {
8323: $hostname{$id}=$name;
8324: push(@{$name_to_host{$name}}, $id);
8325: $hostdom{$id}=$domain;
8326: if ($role eq 'library') { $libserv{$id}=$name; }
8327: }
8328: }
8329: }
8330:
8331: sub reset_hosts_info {
8332: &purge_remembered();
8333: &reset_domain_info();
8334: &reset_hosts_ip_info();
8335: undef(%name_to_host);
8336: undef(%hostname);
8337: undef(%hostdom);
8338: undef(%libserv);
8339: undef($loaded);
8340: }
8341:
8342: sub load_hosts_tab {
8343: my ($ignore_cache) = @_;
8344: &get_dns('/adm/dns/hosts',\&parse_hosts_tab,$ignore_cache);
8345: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
8346: my @config = <$config>;
8347: &parse_hosts_tab(\@config);
8348: close($config);
8349: $loaded=1;
8350: }
8351:
8352: sub hostname {
8353: &load_hosts_tab() if (!$loaded);
8354:
8355: my ($lonid) = @_;
8356: return $hostname{$lonid};
8357: }
8358:
8359: sub all_hostnames {
8360: &load_hosts_tab() if (!$loaded);
8361:
8362: return %hostname;
8363: }
8364:
8365: sub all_names {
8366: &load_hosts_tab() if (!$loaded);
8367:
8368: return %name_to_host;
8369: }
8370:
8371: sub is_library {
8372: &load_hosts_tab() if (!$loaded);
8373:
8374: return exists($libserv{$_[0]});
8375: }
8376:
8377: sub all_library {
8378: &load_hosts_tab() if (!$loaded);
8379:
8380: return %libserv;
8381: }
8382:
8383: sub get_servers {
8384: &load_hosts_tab() if (!$loaded);
8385:
8386: my ($domain,$type) = @_;
8387: my %possible_hosts = ($type eq 'library') ? %libserv
8388: : %hostname;
8389: my %result;
8390: if (ref($domain) eq 'ARRAY') {
8391: while ( my ($host,$hostname) = each(%possible_hosts)) {
8392: if (grep(/^\Q$hostdom{$host}\E$/,@$domain)) {
8393: $result{$host} = $hostname;
8394: }
8395: }
8396: } else {
8397: while ( my ($host,$hostname) = each(%possible_hosts)) {
8398: if ($hostdom{$host} eq $domain) {
8399: $result{$host} = $hostname;
8400: }
8401: }
8402: }
8403: return %result;
8404: }
8405:
8406: sub host_domain {
8407: &load_hosts_tab() if (!$loaded);
8408:
8409: my ($lonid) = @_;
8410: return $hostdom{$lonid};
8411: }
8412:
8413: sub all_domains {
8414: &load_hosts_tab() if (!$loaded);
8415:
8416: my %seen;
8417: my @uniq = grep(!$seen{$_}++, values(%hostdom));
8418: return @uniq;
8419: }
8420: }
8421:
8422: {
8423: my %iphost;
8424: my %name_to_ip;
8425: my %lonid_to_ip;
8426:
8427: sub get_hosts_from_ip {
8428: my ($ip) = @_;
8429: my %iphosts = &get_iphost();
8430: if (ref($iphosts{$ip})) {
8431: return @{$iphosts{$ip}};
8432: }
8433: return;
8434: }
8435:
8436: sub reset_hosts_ip_info {
8437: undef(%iphost);
8438: undef(%name_to_ip);
8439: undef(%lonid_to_ip);
8440: }
8441:
8442: sub get_host_ip {
8443: my ($lonid) = @_;
8444: if (exists($lonid_to_ip{$lonid})) {
8445: return $lonid_to_ip{$lonid};
8446: }
8447: my $name=&hostname($lonid);
8448: my $ip = gethostbyname($name);
8449: return if (!$ip || length($ip) ne 4);
8450: $ip=inet_ntoa($ip);
8451: $name_to_ip{$name} = $ip;
8452: $lonid_to_ip{$lonid} = $ip;
8453: return $ip;
8454: }
8455:
8456: sub get_iphost {
8457: my ($ignore_cache) = @_;
8458:
8459: if (!$ignore_cache) {
8460: if (%iphost) {
8461: return %iphost;
8462: }
8463: my ($ip_info,$cached)=
8464: &Apache::lonnet::is_cached_new('iphost','iphost');
8465: if ($cached) {
8466: %iphost = %{$ip_info->[0]};
8467: %name_to_ip = %{$ip_info->[1]};
8468: %lonid_to_ip = %{$ip_info->[2]};
8469: return %iphost;
8470: }
8471: }
8472:
8473: # get yesterday's info for fallback
8474: my %old_name_to_ip;
8475: my ($ip_info,$cached)=
8476: &Apache::lonnet::is_cached_new('iphost','iphost');
8477: if ($cached) {
8478: %old_name_to_ip = %{$ip_info->[1]};
8479: }
8480:
8481: my %name_to_host = &all_names();
8482: foreach my $name (keys(%name_to_host)) {
8483: my $ip;
8484: if (!exists($name_to_ip{$name})) {
8485: $ip = gethostbyname($name);
8486: if (!$ip || length($ip) ne 4) {
8487: if (defined($old_name_to_ip{$name})) {
8488: $ip = $old_name_to_ip{$name};
8489: &logthis("Can't find $name defaulting to old $ip");
8490: } else {
8491: &logthis("Name $name no IP found");
8492: next;
8493: }
8494: } else {
8495: $ip=inet_ntoa($ip);
8496: }
8497: $name_to_ip{$name} = $ip;
8498: } else {
8499: $ip = $name_to_ip{$name};
8500: }
8501: foreach my $id (@{ $name_to_host{$name} }) {
8502: $lonid_to_ip{$id} = $ip;
8503: }
8504: push(@{$iphost{$ip}},@{$name_to_host{$name}});
8505: }
8506: &Apache::lonnet::do_cache_new('iphost','iphost',
8507: [\%iphost,\%name_to_ip,\%lonid_to_ip],
8508: 48*60*60);
8509:
8510: return %iphost;
8511: }
8512: }
8513:
8514: BEGIN {
8515:
8516: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
8517: unless ($readit) {
8518: {
8519: my $configvars = LONCAPA::Configuration::read_conf('loncapa.conf');
8520: %perlvar = (%perlvar,%{$configvars});
8521: }
8522:
8523:
8524: # ------------------------------------------------------ Read spare server file
8525: {
8526: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
8527:
8528: while (my $configline=<$config>) {
8529: chomp($configline);
8530: if ($configline) {
8531: my ($host,$type) = split(':',$configline,2);
8532: if (!defined($type) || $type eq '') { $type = 'default' };
8533: push(@{ $spareid{$type} }, $host);
8534: }
8535: }
8536: close($config);
8537: }
8538: # ------------------------------------------------------------ Read permissions
8539: {
8540: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
8541:
8542: while (my $configline=<$config>) {
8543: chomp($configline);
8544: if ($configline) {
8545: my ($role,$perm)=split(/ /,$configline);
8546: if ($perm ne '') { $pr{$role}=$perm; }
8547: }
8548: }
8549: close($config);
8550: }
8551:
8552: # -------------------------------------------- Read plain texts for permissions
8553: {
8554: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
8555:
8556: while (my $configline=<$config>) {
8557: chomp($configline);
8558: if ($configline) {
8559: my ($short,@plain)=split(/:/,$configline);
8560: %{$prp{$short}} = ();
8561: if (@plain > 0) {
8562: $prp{$short}{'std'} = $plain[0];
8563: for (my $i=1; $i<@plain; $i++) {
8564: $prp{$short}{'alt'.$i} = $plain[$i];
8565: }
8566: }
8567: }
8568: }
8569: close($config);
8570: }
8571:
8572: # ---------------------------------------------------------- Read package table
8573: {
8574: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
8575:
8576: while (my $configline=<$config>) {
8577: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
8578: chomp($configline);
8579: my ($short,$plain)=split(/:/,$configline);
8580: my ($pack,$name)=split(/\&/,$short);
8581: if ($plain ne '') {
8582: $packagetab{$pack.'&'.$name.'&name'}=$name;
8583: $packagetab{$short}=$plain;
8584: }
8585: }
8586: close($config);
8587: }
8588:
8589: # ------------- set up temporary directory
8590: {
8591: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
8592:
8593: }
8594:
8595: $memcache=new Cache::Memcached({'servers' => ['127.0.0.1:11211'],
8596: 'compress_threshold'=> 20_000,
8597: });
8598:
8599: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
8600: $dumpcount=0;
8601:
8602: &logtouch();
8603: &logthis('<font color="yellow">INFO: Read configuration</font>');
8604: $readit=1;
8605: {
8606: use integer;
8607: my $test=(2**32)+1;
8608: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
8609: &logthis(" Detected 64bit platform ($_64bit)");
8610: }
8611: }
8612: }
8613:
8614: 1;
8615: __END__
8616:
8617: =pod
8618:
8619: =head1 NAME
8620:
8621: Apache::lonnet - Subroutines to ask questions about things in the network.
8622:
8623: =head1 SYNOPSIS
8624:
8625: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
8626:
8627: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
8628:
8629: Common parameters:
8630:
8631: =over 4
8632:
8633: =item *
8634:
8635: $uname : an internal username (if $cname expecting a course Id specifically)
8636:
8637: =item *
8638:
8639: $udom : a domain (if $cdom expecting a course's domain specifically)
8640:
8641: =item *
8642:
8643: $symb : a resource instance identifier
8644:
8645: =item *
8646:
8647: $namespace : the name of a .db file that contains the data needed or
8648: being set.
8649:
8650: =back
8651:
8652: =head1 OVERVIEW
8653:
8654: lonnet provides subroutines which interact with the
8655: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
8656: about classes, users, and resources.
8657:
8658: For many of these objects you can also use this to store data about
8659: them or modify them in various ways.
8660:
8661: =head2 Symbs
8662:
8663: To identify a specific instance of a resource, LON-CAPA uses symbols
8664: or "symbs"X<symb>. These identifiers are built from the URL of the
8665: map, the resource number of the resource in the map, and the URL of
8666: the resource itself. The latter is somewhat redundant, but might help
8667: if maps change.
8668:
8669: An example is
8670:
8671: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
8672:
8673: The respective map entry is
8674:
8675: <resource id="19" src="/res/msu/korte/tests/part12.problem"
8676: title="Problem 2">
8677: </resource>
8678:
8679: Symbs are used by the random number generator, as well as to store and
8680: restore data specific to a certain instance of for example a problem.
8681:
8682: =head2 Storing And Retrieving Data
8683:
8684: X<store()>X<cstore()>X<restore()>Three of the most important functions
8685: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
8686: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
8687: is is the non-critical message twin of cstore. These functions are for
8688: handlers to store a perl hash to a user's permanent data space in an
8689: easy manner, and to retrieve it again on another call. It is expected
8690: that a handler would use this once at the beginning to retrieve data,
8691: and then again once at the end to send only the new data back.
8692:
8693: The data is stored in the user's data directory on the user's
8694: homeserver under the ID of the course.
8695:
8696: The hash that is returned by restore will have all of the previous
8697: value for all of the elements of the hash.
8698:
8699: Example:
8700:
8701: #creating a hash
8702: my %hash;
8703: $hash{'foo'}='bar';
8704:
8705: #storing it
8706: &Apache::lonnet::cstore(\%hash);
8707:
8708: #changing a value
8709: $hash{'foo'}='notbar';
8710:
8711: #adding a new value
8712: $hash{'bar'}='foo';
8713: &Apache::lonnet::cstore(\%hash);
8714:
8715: #retrieving the hash
8716: my %history=&Apache::lonnet::restore();
8717:
8718: #print the hash
8719: foreach my $key (sort(keys(%history))) {
8720: print("\%history{$key} = $history{$key}");
8721: }
8722:
8723: Will print out:
8724:
8725: %history{1:foo} = bar
8726: %history{1:keys} = foo:timestamp
8727: %history{1:timestamp} = 990455579
8728: %history{2:bar} = foo
8729: %history{2:foo} = notbar
8730: %history{2:keys} = foo:bar:timestamp
8731: %history{2:timestamp} = 990455580
8732: %history{bar} = foo
8733: %history{foo} = notbar
8734: %history{timestamp} = 990455580
8735: %history{version} = 2
8736:
8737: Note that the special hash entries C<keys>, C<version> and
8738: C<timestamp> were added to the hash. C<version> will be equal to the
8739: total number of versions of the data that have been stored. The
8740: C<timestamp> attribute will be the UNIX time the hash was
8741: stored. C<keys> is available in every historical section to list which
8742: keys were added or changed at a specific historical revision of a
8743: hash.
8744:
8745: B<Warning>: do not store the hash that restore returns directly. This
8746: will cause a mess since it will restore the historical keys as if the
8747: were new keys. I.E. 1:foo will become 1:1:foo etc.
8748:
8749: Calling convention:
8750:
8751: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
8752: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
8753:
8754: For more detailed information, see lonnet specific documentation.
8755:
8756: =head1 RETURN MESSAGES
8757:
8758: =over 4
8759:
8760: =item * B<con_lost>: unable to contact remote host
8761:
8762: =item * B<con_delayed>: unable to contact remote host, message will be delivered
8763: when the connection is brought back up
8764:
8765: =item * B<con_failed>: unable to contact remote host and unable to save message
8766: for later delivery
8767:
8768: =item * B<error:>: an error a occured, a description of the error follows the :
8769:
8770: =item * B<no_such_host>: unable to fund a host associated with the user/domain
8771: that was requested
8772:
8773: =back
8774:
8775: =head1 PUBLIC SUBROUTINES
8776:
8777: =head2 Session Environment Functions
8778:
8779: =over 4
8780:
8781: =item *
8782: X<appenv()>
8783: B<appenv(%hash)>: the value of %hash is written to
8784: the user envirnoment file, and will be restored for each access this
8785: user makes during this session, also modifies the %env for the current
8786: process
8787:
8788: =item *
8789: X<delenv()>
8790: B<delenv($regexp)>: removes all items from the session
8791: environment file that matches the regular expression in $regexp. The
8792: values are also delted from the current processes %env.
8793:
8794: =item * get_env_multiple($name)
8795:
8796: gets $name from the %env hash, it seemlessly handles the cases where multiple
8797: values may be defined and end up as an array ref.
8798:
8799: returns an array of values
8800:
8801: =back
8802:
8803: =head2 User Information
8804:
8805: =over 4
8806:
8807: =item *
8808: X<queryauthenticate()>
8809: B<queryauthenticate($uname,$udom)>: try to determine user's current
8810: authentication scheme
8811:
8812: =item *
8813: X<authenticate()>
8814: B<authenticate($uname,$upass,$udom)>: try to
8815: authenticate user from domain's lib servers (first use the current
8816: one). C<$upass> should be the users password.
8817:
8818: =item *
8819: X<homeserver()>
8820: B<homeserver($uname,$udom)>: find the server which has
8821: the user's directory and files (there must be only one), this caches
8822: the answer, and also caches if there is a borken connection.
8823:
8824: =item *
8825: X<idget()>
8826: B<idget($udom,@ids)>: find the usernames behind a list of IDs
8827: (IDs are a unique resource in a domain, there must be only 1 ID per
8828: username, and only 1 username per ID in a specific domain) (returns
8829: hash: id=>name,id=>name)
8830:
8831: =item *
8832: X<idrget()>
8833: B<idrget($udom,@unames)>: find the IDs behind a list of
8834: usernames (returns hash: name=>id,name=>id)
8835:
8836: =item *
8837: X<idput()>
8838: B<idput($udom,%ids)>: store away a list of names and associated IDs
8839:
8840: =item *
8841: X<rolesinit()>
8842: B<rolesinit($udom,$username,$authhost)>: get user privileges
8843:
8844: =item *
8845: X<getsection()>
8846: B<getsection($udom,$uname,$cname)>: finds the section of student in the
8847: course $cname, return section name/number or '' for "not in course"
8848: and '-1' for "no section"
8849:
8850: =item *
8851: X<userenvironment()>
8852: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
8853: passed in @what from the requested user's environment, returns a hash
8854:
8855: =item *
8856: X<userlog_query()>
8857: B<userlog_query($uname,$udom,%filters)>: retrieves data from a user's
8858: activity.log file. %filters defines filters applied when parsing the
8859: log file. These can be start or end timestamps, or the type of action
8860: - log to look for Login or Logout events, check for Checkin or
8861: Checkout, role for role selection. The response is in the form
8862: timestamp1:hostid1:event1×tamp2:hostid2:event2 where events are
8863: escaped strings of the action recorded in the activity.log file.
8864:
8865: =back
8866:
8867: =head2 User Roles
8868:
8869: =over 4
8870:
8871: =item *
8872:
8873: allowed($priv,$uri,$symb,$role) : check for a user privilege; returns codes for allowed actions
8874: F: full access
8875: U,I,K: authentication modes (cxx only)
8876: '': forbidden
8877: 1: user needs to choose course
8878: 2: browse allowed
8879: A: passphrase authentication needed
8880:
8881: =item *
8882:
8883: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
8884: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
8885: and course level
8886:
8887: =item *
8888:
8889: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
8890: explanation of a user role term
8891:
8892: =item *
8893:
8894: get_my_roles($uname,$udom,$context,$types,$roles,$roledoms,$withsec) :
8895: All arguments are optional. Returns a hash of a roles, either for
8896: co-author/assistant author roles for a user's Construction Space
8897: (default), or if $context is 'userroles', roles for the user himself,
8898: In the hash, keys are set to colon-separated $uname,$udom,$role, and
8899: (optionally) if $withsec is true, a fourth colon-separated item - $section.
8900: For each key, value is set to colon-separated start and end times for
8901: the role. If no username and domain are specified, will default to
8902: current user/domain. Types, roles, and roledoms are references to arrays
8903: of role statuses (active, future or previous), roles
8904: (e.g., cc,in, st etc.) and domains of the roles which can be used
8905: to restrict the list of roles reported. If no array ref is
8906: provided for types, will default to return only active roles.
8907:
8908: =back
8909:
8910: =head2 User Modification
8911:
8912: =over 4
8913:
8914: =item *
8915:
8916: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
8917: user for the level given by URL. Optional start and end dates (leave empty
8918: string or zero for "no date")
8919:
8920: =item *
8921:
8922: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
8923: change a users, password, possible return values are: ok,
8924: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
8925: refused
8926:
8927: =item *
8928:
8929: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
8930:
8931: =item *
8932:
8933: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
8934: modify user
8935:
8936: =item *
8937:
8938: modifystudent
8939:
8940: modify a students enrollment and identification information.
8941: The course id is resolved based on the current users environment.
8942: This means the envoking user must be a course coordinator or otherwise
8943: associated with a course.
8944:
8945: This call is essentially a wrapper for lonnet::modifyuser and
8946: lonnet::modify_student_enrollment
8947:
8948: Inputs:
8949:
8950: =over 4
8951:
8952: =item B<$udom> Students loncapa domain
8953:
8954: =item B<$uname> Students loncapa login name
8955:
8956: =item B<$uid> Students id/student number
8957:
8958: =item B<$umode> Students authentication mode
8959:
8960: =item B<$upass> Students password
8961:
8962: =item B<$first> Students first name
8963:
8964: =item B<$middle> Students middle name
8965:
8966: =item B<$last> Students last name
8967:
8968: =item B<$gene> Students generation
8969:
8970: =item B<$usec> Students section in course
8971:
8972: =item B<$end> Unix time of the roles expiration
8973:
8974: =item B<$start> Unix time of the roles start date
8975:
8976: =item B<$forceid> If defined, allow $uid to be changed
8977:
8978: =item B<$desiredhome> server to use as home server for student
8979:
8980: =back
8981:
8982: =item *
8983:
8984: modify_student_enrollment
8985:
8986: Change a students enrollment status in a class. The environment variable
8987: 'role.request.course' must be defined for this function to proceed.
8988:
8989: Inputs:
8990:
8991: =over 4
8992:
8993: =item $udom, students domain
8994:
8995: =item $uname, students name
8996:
8997: =item $uid, students user id
8998:
8999: =item $first, students first name
9000:
9001: =item $middle
9002:
9003: =item $last
9004:
9005: =item $gene
9006:
9007: =item $usec
9008:
9009: =item $end
9010:
9011: =item $start
9012:
9013: =back
9014:
9015:
9016: =item *
9017:
9018: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
9019: custom role; give a custom role to a user for the level given by URL. Specify
9020: name and domain of role author, and role name
9021:
9022: =item *
9023:
9024: revokerole($udom,$uname,$url,$role) : revoke a role for url
9025:
9026: =item *
9027:
9028: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
9029:
9030: =back
9031:
9032: =head2 Course Infomation
9033:
9034: =over 4
9035:
9036: =item *
9037:
9038: coursedescription($courseid) : returns a hash of information about the
9039: specified course id, including all environment settings for the
9040: course, the description of the course will be in the hash under the
9041: key 'description'
9042:
9043: =item *
9044:
9045: resdata($name,$domain,$type,@which) : request for current parameter
9046: setting for a specific $type, where $type is either 'course' or 'user',
9047: @what should be a list of parameters to ask about. This routine caches
9048: answers for 5 minutes.
9049:
9050: =item *
9051:
9052: get_courseresdata($courseid, $domain) : dump the entire course resource
9053: data base, returning a hash that is keyed by the resource name and has
9054: values that are the resource value. I believe that the timestamps and
9055: versions are also returned.
9056:
9057:
9058: =back
9059:
9060: =head2 Course Modification
9061:
9062: =over 4
9063:
9064: =item *
9065:
9066: writecoursepref($courseid,%prefs) : write preferences (environment
9067: database) for a course
9068:
9069: =item *
9070:
9071: createcourse($udom,$description,$url) : make/modify course
9072:
9073: =back
9074:
9075: =head2 Resource Subroutines
9076:
9077: =over 4
9078:
9079: =item *
9080:
9081: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
9082:
9083: =item *
9084:
9085: repcopy($filename) : subscribes to the requested file, and attempts to
9086: replicate from the owning library server, Might return
9087: 'unavailable', 'not_found', 'forbidden', 'ok', or
9088: 'bad_request', also attempts to grab the metadata for the
9089: resource. Expects the local filesystem pathname
9090: (/home/httpd/html/res/....)
9091:
9092: =back
9093:
9094: =head2 Resource Information
9095:
9096: =over 4
9097:
9098: =item *
9099:
9100: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
9101: a vairety of different possible values, $varname should be a request
9102: string, and the other parameters can be used to specify who and what
9103: one is asking about.
9104:
9105: Possible values for $varname are environment.lastname (or other item
9106: from the envirnment hash), user.name (or someother aspect about the
9107: user), resource.0.maxtries (or some other part and parameter of a
9108: resource)
9109:
9110: =item *
9111:
9112: directcondval($number) : get current value of a condition; reads from a state
9113: string
9114:
9115: =item *
9116:
9117: condval($condidx) : value of condition index based on state
9118:
9119: =item *
9120:
9121: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
9122: resource's metadata, $what should be either a specific key, or either
9123: 'keys' (to get a list of possible keys) or 'packages' to get a list of
9124: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
9125:
9126: this function automatically caches all requests
9127:
9128: =item *
9129:
9130: metadata_query($query,$custom,$customshow) : make a metadata query against the
9131: network of library servers; returns file handle of where SQL and regex results
9132: will be stored for query
9133:
9134: =item *
9135:
9136: symbread($filename) : return symbolic list entry (filename argument optional);
9137: returns the data handle
9138:
9139: =item *
9140:
9141: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
9142: a possible symb for the URL in $thisfn, and if is an encryypted
9143: resource that the user accessed using /enc/ returns a 1 on success, 0
9144: on failure, user must be in a course, as it assumes the existance of
9145: the course initial hash, and uses $env('request.course.id'}
9146:
9147:
9148: =item *
9149:
9150: symbclean($symb) : removes versions numbers from a symb, returns the
9151: cleaned symb
9152:
9153: =item *
9154:
9155: is_on_map($uri) : checks if the $uri is somewhere on the current
9156: course map, user must be in a course for it to work.
9157:
9158: =item *
9159:
9160: numval($salt) : return random seed value (addend for rndseed)
9161:
9162: =item *
9163:
9164: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
9165: a random seed, all arguments are optional, if they aren't sent it uses the
9166: environment to derive them. Note: if symb isn't sent and it can't get one
9167: from &symbread it will use the current time as its return value
9168:
9169: =item *
9170:
9171: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
9172: unfakeable, receipt
9173:
9174: =item *
9175:
9176: receipt() : API to ireceipt working off of env values; given out to users
9177:
9178: =item *
9179:
9180: countacc($url) : count the number of accesses to a given URL
9181:
9182: =item *
9183:
9184: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
9185:
9186: =item *
9187:
9188: checkin($token) : updates that a resource has beeen returned (a hard copy version for instance) and returns the data that $token was Checkout with ($symb, $tuname, $tudom, and $tcrsid)
9189:
9190: =item *
9191:
9192: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
9193:
9194: =item *
9195:
9196: devalidate($symb) : devalidate temporary spreadsheet calculations,
9197: forcing spreadsheet to reevaluate the resource scores next time.
9198:
9199: =back
9200:
9201: =head2 Storing/Retreiving Data
9202:
9203: =over 4
9204:
9205: =item *
9206:
9207: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
9208: for this url; hashref needs to be given and should be a \%hashname; the
9209: remaining args aren't required and if they aren't passed or are '' they will
9210: be derived from the env
9211:
9212: =item *
9213:
9214: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
9215: uses critical subroutine
9216:
9217: =item *
9218:
9219: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
9220: all args are optional
9221:
9222: =item *
9223:
9224: dumpstore($namespace,$udom,$uname,$regexp,$range) :
9225: dumps the complete (or key matching regexp) namespace into a hash
9226: ($udom, $uname, $regexp, $range are optional) for a namespace that is
9227: normally &store()ed into
9228:
9229: $range should be either an integer '100' (give me the first 100
9230: matching records)
9231: or be two integers sperated by a - with no spaces
9232: '30-50' (give me the 30th through the 50th matching
9233: records)
9234:
9235:
9236: =item *
9237:
9238: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
9239: replaces a &store() version of data with a replacement set of data
9240: for a particular resource in a namespace passed in the $storehash hash
9241: reference
9242:
9243: =item *
9244:
9245: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
9246: works very similar to store/cstore, but all data is stored in a
9247: temporary location and can be reset using tmpreset, $storehash should
9248: be a hash reference, returns nothing on success
9249:
9250: =item *
9251:
9252: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
9253: similar to restore, but all data is stored in a temporary location and
9254: can be reset using tmpreset. Returns a hash of values on success,
9255: error string otherwise.
9256:
9257: =item *
9258:
9259: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
9260: deltes all keys for $symb form the temporary storage hash.
9261:
9262: =item *
9263:
9264: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
9265: reference filled in from namesp ($udom and $uname are optional)
9266:
9267: =item *
9268:
9269: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
9270: namesp ($udom and $uname are optional)
9271:
9272: =item *
9273:
9274: dump($namespace,$udom,$uname,$regexp,$range) :
9275: dumps the complete (or key matching regexp) namespace into a hash
9276: ($udom, $uname, $regexp, $range are optional)
9277:
9278: $range should be either an integer '100' (give me the first 100
9279: matching records)
9280: or be two integers sperated by a - with no spaces
9281: '30-50' (give me the 30th through the 50th matching
9282: records)
9283: =item *
9284:
9285: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
9286: $store can be a scalar, an array reference, or if the amount to be
9287: incremented is > 1, a hash reference.
9288:
9289: ($udom and $uname are optional)
9290:
9291: =item *
9292:
9293: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
9294: ($udom and $uname are optional)
9295:
9296: =item *
9297:
9298: cput($namespace,$storehash,$udom,$uname) : critical put
9299: ($udom and $uname are optional)
9300:
9301: =item *
9302:
9303: newput($namespace,$storehash,$udom,$uname) :
9304:
9305: Attempts to store the items in the $storehash, but only if they don't
9306: currently exist, if this succeeds you can be certain that you have
9307: successfully created a new key value pair in the $namespace db.
9308:
9309:
9310: Args:
9311: $namespace: name of database to store values to
9312: $storehash: hashref to store to the db
9313: $udom: (optional) domain of user containing the db
9314: $uname: (optional) name of user caontaining the db
9315:
9316: Returns:
9317: 'ok' -> succeeded in storing all keys of $storehash
9318: 'key_exists: <key>' -> failed to anything out of $storehash, as at
9319: least <key> already existed in the db (other
9320: requested keys may also already exist)
9321: 'error: <msg>' -> unable to tie the DB or other erorr occured
9322: 'con_lost' -> unable to contact request server
9323: 'refused' -> action was not allowed by remote machine
9324:
9325:
9326: =item *
9327:
9328: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
9329: reference filled in from namesp (encrypts the return communication)
9330: ($udom and $uname are optional)
9331:
9332: =item *
9333:
9334: log($udom,$name,$home,$message) : write to permanent log for user; use
9335: critical subroutine
9336:
9337: =item *
9338:
9339: get_dom($namespace,$storearr,$udom,$uhome) : returns hash with keys from
9340: array reference filled in from namespace found in domain level on either
9341: specified domain server ($uhome) or primary domain server ($udom and $uhome are optional).
9342:
9343: =item *
9344:
9345: put_dom($namespace,$storehash,$udom,$uhome) : stores hash in namespace at
9346: domain level either on specified domain server ($uhome) or primary domain
9347: server ($udom and $uhome are optional)
9348:
9349: =back
9350:
9351: =head2 Network Status Functions
9352:
9353: =over 4
9354:
9355: =item *
9356:
9357: dirlist($uri) : return directory list based on URI
9358:
9359: =item *
9360:
9361: spareserver() : find server with least workload from spare.tab
9362:
9363: =back
9364:
9365: =head2 Apache Request
9366:
9367: =over 4
9368:
9369: =item *
9370:
9371: ssi($url,%hash) : server side include, does a complete request cycle on url to
9372: localhost, posts hash
9373:
9374: =back
9375:
9376: =head2 Data to String to Data
9377:
9378: =over 4
9379:
9380: =item *
9381:
9382: hash2str(%hash) : convert a hash into a string complete with escaping and '='
9383: and '&' separators, supports elements that are arrayrefs and hashrefs
9384:
9385: =item *
9386:
9387: hashref2str($hashref) : convert a hashref into a string complete with
9388: escaping and '=' and '&' separators, supports elements that are
9389: arrayrefs and hashrefs
9390:
9391: =item *
9392:
9393: arrayref2str($arrayref) : convert an arrayref into a string complete
9394: with escaping and '&' separators, supports elements that are arrayrefs
9395: and hashrefs
9396:
9397: =item *
9398:
9399: str2hash($string) : convert string to hash using unescaping and
9400: splitting on '=' and '&', supports elements that are arrayrefs and
9401: hashrefs
9402:
9403: =item *
9404:
9405: str2array($string) : convert string to hash using unescaping and
9406: splitting on '&', supports elements that are arrayrefs and hashrefs
9407:
9408: =back
9409:
9410: =head2 Logging Routines
9411:
9412: =over 4
9413:
9414: These routines allow one to make log messages in the lonnet.log and
9415: lonnet.perm logfiles.
9416:
9417: =item *
9418:
9419: logtouch() : make sure the logfile, lonnet.log, exists
9420:
9421: =item *
9422:
9423: logthis() : append message to the normal lonnet.log file, it gets
9424: preiodically rolled over and deleted.
9425:
9426: =item *
9427:
9428: logperm() : append a permanent message to lonnet.perm.log, this log
9429: file never gets deleted by any automated portion of the system, only
9430: messages of critical importance should go in here.
9431:
9432: =back
9433:
9434: =head2 General File Helper Routines
9435:
9436: =over 4
9437:
9438: =item *
9439:
9440: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
9441: (a) files in /uploaded
9442: (i) If a local copy of the file exists -
9443: compares modification date of local copy with last-modified date for
9444: definitive version stored on home server for course. If local copy is
9445: stale, requests a new version from the home server and stores it.
9446: If the original has been removed from the home server, then local copy
9447: is unlinked.
9448: (ii) If local copy does not exist -
9449: requests the file from the home server and stores it.
9450:
9451: If $caller is 'uploadrep':
9452: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
9453: for request for files originally uploaded via DOCS.
9454: - returns 'ok' if fresh local copy now available, -1 otherwise.
9455:
9456: Otherwise:
9457: This indicates a call from the content generation phase of the request.
9458: - returns the entire contents of the file or -1.
9459:
9460: (b) files in /res
9461: - returns the entire contents of a file or -1;
9462: it properly subscribes to and replicates the file if neccessary.
9463:
9464:
9465: =item *
9466:
9467: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
9468: reference
9469:
9470: returns either a stat() list of data about the file or an empty list
9471: if the file doesn't exist or couldn't find out about it (connection
9472: problems or user unknown)
9473:
9474: =item *
9475:
9476: filelocation($dir,$file) : returns file system location of a file
9477: based on URI; meant to be "fairly clean" absolute reference, $dir is a
9478: directory that relative $file lookups are to looked in ($dir of /a/dir
9479: and a file of ../bob will become /a/bob)
9480:
9481: =item *
9482:
9483: hreflocation($dir,$file) : returns file system location or a URL; same as
9484: filelocation except for hrefs
9485:
9486: =item *
9487:
9488: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
9489:
9490: =back
9491:
9492: =head2 Usererfile file routines (/uploaded*)
9493:
9494: =over 4
9495:
9496: =item *
9497:
9498: userfileupload(): main rotine for putting a file in a user or course's
9499: filespace, arguments are,
9500:
9501: formname - required - this is the name of the element in $env where the
9502: filename, and the contents of the file to create/modifed exist
9503: the filename is in $env{'form.'.$formname.'.filename'} and the
9504: contents of the file is located in $env{'form.'.$formname}
9505: coursedoc - if true, store the file in the course of the active role
9506: of the current user
9507: subdir - required - subdirectory to put the file in under ../userfiles/
9508: if undefined, it will be placed in "unknown"
9509:
9510: (This routine calls clean_filename() to remove any dangerous
9511: characters from the filename, and then calls finuserfileupload() to
9512: complete the transaction)
9513:
9514: returns either the url of the uploaded file (/uploaded/....) if successful
9515: and /adm/notfound.html if unsuccessful
9516:
9517: =item *
9518:
9519: clean_filename(): routine for cleaing a filename up for storage in
9520: userfile space, argument is:
9521:
9522: filename - proposed filename
9523:
9524: returns: the new clean filename
9525:
9526: =item *
9527:
9528: finishuserfileupload(): routine that creaes and sends the file to
9529: userspace, probably shouldn't be called directly
9530:
9531: docuname: username or courseid of destination for the file
9532: docudom: domain of user/course of destination for the file
9533: formname: same as for userfileupload()
9534: fname: filename (inculding subdirectories) for the file
9535:
9536: returns either the url of the uploaded file (/uploaded/....) if successful
9537: and /adm/notfound.html if unsuccessful
9538:
9539: =item *
9540:
9541: renameuserfile(): renames an existing userfile to a new name
9542:
9543: Args:
9544: docuname: username or courseid of destination for the file
9545: docudom: domain of user/course of destination for the file
9546: old: current file name (including any subdirs under userfiles)
9547: new: desired file name (including any subdirs under userfiles)
9548:
9549: =item *
9550:
9551: mkdiruserfile(): creates a directory is a userfiles dir
9552:
9553: Args:
9554: docuname: username or courseid of destination for the file
9555: docudom: domain of user/course of destination for the file
9556: dir: dir to create (including any subdirs under userfiles)
9557:
9558: =item *
9559:
9560: removeuserfile(): removes a file that exists in userfiles
9561:
9562: Args:
9563: docuname: username or courseid of destination for the file
9564: docudom: domain of user/course of destination for the file
9565: fname: filname to delete (including any subdirs under userfiles)
9566:
9567: =item *
9568:
9569: removeuploadedurl(): convience function for removeuserfile()
9570:
9571: Args:
9572: url: a full /uploaded/... url to delete
9573:
9574: =item *
9575:
9576: get_portfile_permissions():
9577: Args:
9578: domain: domain of user or course contain the portfolio files
9579: user: name of user or num of course contain the portfolio files
9580: Returns:
9581: hashref of a dump of the proper file_permissions.db
9582:
9583:
9584: =item *
9585:
9586: get_access_controls():
9587:
9588: Args:
9589: current_permissions: the hash ref returned from get_portfile_permissions()
9590: group: (optional) the group you want the files associated with
9591: file: (optional) the file you want access info on
9592:
9593: Returns:
9594: a hash (keys are file names) of hashes containing
9595: keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
9596: values are XML containing access control settings (see below)
9597:
9598: Internal notes:
9599:
9600: access controls are stored in file_permissions.db as key=value pairs.
9601: key -> path to file/file_name\0uniqueID:scope_end_start
9602: where scope -> public,guest,course,group,domains or users.
9603: end -> UNIX time for end of access (0 -> no end date)
9604: start -> UNIX time for start of access
9605:
9606: value -> XML description of access control
9607: <scope type=""> (type =1 of: public,guest,course,group,domains,users">
9608: <start></start>
9609: <end></end>
9610:
9611: <password></password> for scope type = guest
9612:
9613: <domain></domain> for scope type = course or group
9614: <number></number>
9615: <roles id="">
9616: <role></role>
9617: <access></access>
9618: <section></section>
9619: <group></group>
9620: </roles>
9621:
9622: <dom></dom> for scope type = domains
9623:
9624: <users> for scope type = users
9625: <user>
9626: <uname></uname>
9627: <udom></udom>
9628: </user>
9629: </users>
9630: </scope>
9631:
9632: Access data is also aggregated for each file in an additional key=value pair:
9633: key -> path to file/file_name\0accesscontrol
9634: value -> reference to hash
9635: hash contains key = value pairs
9636: where key = uniqueID:scope_end_start
9637: value = UNIX time record was last updated
9638:
9639: Used to improve speed of look-ups of access controls for each file.
9640:
9641: Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
9642:
9643: modify_access_controls():
9644:
9645: Modifies access controls for a portfolio file
9646: Args
9647: 1. file name
9648: 2. reference to hash of required changes,
9649: 3. domain
9650: 4. username
9651: where domain,username are the domain of the portfolio owner
9652: (either a user or a course)
9653:
9654: Returns:
9655: 1. result of additions or updates ('ok' or 'error', with error message).
9656: 2. result of deletions ('ok' or 'error', with error message).
9657: 3. reference to hash of any new or updated access controls.
9658: 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
9659: key = integer (inbound ID)
9660: value = uniqueID
9661:
9662: =back
9663:
9664: =head2 HTTP Helper Routines
9665:
9666: =over 4
9667:
9668: =item *
9669:
9670: escape() : unpack non-word characters into CGI-compatible hex codes
9671:
9672: =item *
9673:
9674: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
9675:
9676: =back
9677:
9678: =head1 PRIVATE SUBROUTINES
9679:
9680: =head2 Underlying communication routines (Shouldn't call)
9681:
9682: =over 4
9683:
9684: =item *
9685:
9686: subreply() : tries to pass a message to lonc, returns con_lost if incapable
9687:
9688: =item *
9689:
9690: reply() : uses subreply to send a message to remote machine, logs all failures
9691:
9692: =item *
9693:
9694: critical() : passes a critical message to another server; if cannot
9695: get through then place message in connection buffer directory and
9696: returns con_delayed, if incapable of saving message, returns
9697: con_failed
9698:
9699: =item *
9700:
9701: reconlonc() : tries to reconnect lonc client processes.
9702:
9703: =back
9704:
9705: =head2 Resource Access Logging
9706:
9707: =over 4
9708:
9709: =item *
9710:
9711: flushcourselogs() : flush (save) buffer logs and access logs
9712:
9713: =item *
9714:
9715: courselog($what) : save message for course in hash
9716:
9717: =item *
9718:
9719: courseacclog($what) : save message for course using &courselog(). Perform
9720: special processing for specific resource types (problems, exams, quizzes, etc).
9721:
9722: =item *
9723:
9724: goodbye() : flush course logs and log shutting down; it is called in srm.conf
9725: as a PerlChildExitHandler
9726:
9727: =back
9728:
9729: =head2 Other
9730:
9731: =over 4
9732:
9733: =item *
9734:
9735: symblist($mapname,%newhash) : update symbolic storage links
9736:
9737: =back
9738:
9739: =cut
9740:
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