1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.917 2007/10/01 23:53:44 albertel 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: # there is a copy in lond
517: sub userload {
518: my $numusers=0;
519: {
520: opendir(LONIDS,$perlvar{'lonIDsDir'});
521: my $filename;
522: my $curtime=time;
523: while ($filename=readdir(LONIDS)) {
524: if ($filename eq '.' || $filename eq '..') {next;}
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,$rules) = @_;
1051: my %returnhash;
1052: if ($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 $response=&unescape(&reply('instrulecheck:'.&escape($udom).':'.
1059: &escape($uname).':'.$rulestr,
1060: $homeserver));
1061: if ($response ne 'refused') {
1062: my @pairs=split(/\&/,$response);
1063: foreach my $item (@pairs) {
1064: my ($key,$value)=split(/=/,$item,2);
1065: $key = &unescape($key);
1066: next if ($key =~ /^error: 2 /);
1067: $returnhash{$key}=&thaw_unescape($value);
1068: }
1069: }
1070: }
1071: }
1072: }
1073: return %returnhash;
1074: }
1075:
1076: sub inst_userrules {
1077: my ($udom) = @_;
1078: my (%ruleshash,@ruleorder);
1079: if ($udom ne '') {
1080: my $homeserver=&domain($udom,'primary');
1081: if (($homeserver ne '') && ($homeserver ne 'no_host')) {
1082: my $response=&reply('instuserrules:'.&escape($udom),
1083: $homeserver);
1084: if (($response ne 'refused') && ($response ne 'error') &&
1085: ($response ne 'no_such_host')) {
1086: my ($hashitems,$orderitems) = split(/:/,$response);
1087: my @pairs=split(/\&/,$hashitems);
1088: foreach my $item (@pairs) {
1089: my ($key,$value)=split(/=/,$item,2);
1090: $key = &unescape($key);
1091: next if ($key =~ /^error: 2 /);
1092: $ruleshash{$key}=&thaw_unescape($value);
1093: }
1094: my @esc_order = split(/\&/,$orderitems);
1095: foreach my $item (@esc_order) {
1096: push(@ruleorder,&unescape($item));
1097: }
1098: }
1099: }
1100: }
1101: return (\%ruleshash,\@ruleorder);
1102: }
1103:
1104: # --------------------------------------------------- Assign a key to a student
1105:
1106: sub assign_access_key {
1107: #
1108: # a valid key looks like uname:udom#comments
1109: # comments are being appended
1110: #
1111: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
1112: $kdom=
1113: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
1114: $knum=
1115: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
1116: $cdom=
1117: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1118: $cnum=
1119: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1120: $udom=$env{'user.name'} unless (defined($udom));
1121: $uname=$env{'user.domain'} unless (defined($uname));
1122: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
1123: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
1124: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
1125: # assigned to this person
1126: # - this should not happen,
1127: # unless something went wrong
1128: # the first time around
1129: # ready to assign
1130: $logentry=$1.'; '.$logentry;
1131: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
1132: $kdom,$knum) eq 'ok') {
1133: # key now belongs to user
1134: my $envkey='key.'.$cdom.'_'.$cnum;
1135: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
1136: &appenv('environment.'.$envkey => $ckey);
1137: return 'ok';
1138: } else {
1139: return
1140: 'error: Count not permanently assign key, will need to be re-entered later.';
1141: }
1142: } else {
1143: return 'error: Could not assign key, try again later.';
1144: }
1145: } elsif (!$existing{$ckey}) {
1146: # the key does not exist
1147: return 'error: The key does not exist';
1148: } else {
1149: # the key is somebody else's
1150: return 'error: The key is already in use';
1151: }
1152: }
1153:
1154: # ------------------------------------------ put an additional comment on a key
1155:
1156: sub comment_access_key {
1157: #
1158: # a valid key looks like uname:udom#comments
1159: # comments are being appended
1160: #
1161: my ($ckey,$cdom,$cnum,$logentry)=@_;
1162: $cdom=
1163: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1164: $cnum=
1165: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1166: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1167: if ($existing{$ckey}) {
1168: $existing{$ckey}.='; '.$logentry;
1169: # ready to assign
1170: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
1171: $cdom,$cnum) eq 'ok') {
1172: return 'ok';
1173: } else {
1174: return 'error: Count not store comment.';
1175: }
1176: } else {
1177: # the key does not exist
1178: return 'error: The key does not exist';
1179: }
1180: }
1181:
1182: # ------------------------------------------------------ Generate a set of keys
1183:
1184: sub generate_access_keys {
1185: my ($number,$cdom,$cnum,$logentry)=@_;
1186: $cdom=
1187: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1188: $cnum=
1189: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1190: unless (&allowed('mky',$cdom)) { return 0; }
1191: unless (($cdom) && ($cnum)) { return 0; }
1192: if ($number>10000) { return 0; }
1193: sleep(2); # make sure don't get same seed twice
1194: srand(time()^($$+($$<<15))); # from "Programming Perl"
1195: my $total=0;
1196: for (my $i=1;$i<=$number;$i++) {
1197: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
1198: sprintf("%lx",int(100000*rand)).'-'.
1199: sprintf("%lx",int(100000*rand));
1200: $newkey=~s/1/g/g; # folks mix up 1 and l
1201: $newkey=~s/0/h/g; # and also 0 and O
1202: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
1203: if ($existing{$newkey}) {
1204: $i--;
1205: } else {
1206: if (&put('accesskeys',
1207: { $newkey => '# generated '.localtime().
1208: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
1209: '; '.$logentry },
1210: $cdom,$cnum) eq 'ok') {
1211: $total++;
1212: }
1213: }
1214: }
1215: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
1216: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
1217: return $total;
1218: }
1219:
1220: # ------------------------------------------------------- Validate an accesskey
1221:
1222: sub validate_access_key {
1223: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
1224: $cdom=
1225: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1226: $cnum=
1227: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1228: $udom=$env{'user.domain'} unless (defined($udom));
1229: $uname=$env{'user.name'} unless (defined($uname));
1230: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1231: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
1232: }
1233:
1234: # ------------------------------------- Find the section of student in a course
1235: sub devalidate_getsection_cache {
1236: my ($udom,$unam,$courseid)=@_;
1237: my $hashid="$udom:$unam:$courseid";
1238: &devalidate_cache_new('getsection',$hashid);
1239: }
1240:
1241: sub courseid_to_courseurl {
1242: my ($courseid) = @_;
1243: #already url style courseid
1244: return $courseid if ($courseid =~ m{^/});
1245:
1246: if (exists($env{'course.'.$courseid.'.num'})) {
1247: my $cnum = $env{'course.'.$courseid.'.num'};
1248: my $cdom = $env{'course.'.$courseid.'.domain'};
1249: return "/$cdom/$cnum";
1250: }
1251:
1252: my %courseinfo=&Apache::lonnet::coursedescription($courseid);
1253: if (exists($courseinfo{'num'})) {
1254: return "/$courseinfo{'domain'}/$courseinfo{'num'}";
1255: }
1256:
1257: return undef;
1258: }
1259:
1260: sub getsection {
1261: my ($udom,$unam,$courseid)=@_;
1262: my $cachetime=1800;
1263:
1264: my $hashid="$udom:$unam:$courseid";
1265: my ($result,$cached)=&is_cached_new('getsection',$hashid);
1266: if (defined($cached)) { return $result; }
1267:
1268: my %Pending;
1269: my %Expired;
1270: #
1271: # Each role can either have not started yet (pending), be active,
1272: # or have expired.
1273: #
1274: # If there is an active role, we are done.
1275: #
1276: # If there is more than one role which has not started yet,
1277: # choose the one which will start sooner
1278: # If there is one role which has not started yet, return it.
1279: #
1280: # If there is more than one expired role, choose the one which ended last.
1281: # If there is a role which has expired, return it.
1282: #
1283: $courseid = &courseid_to_courseurl($courseid);
1284: my %roleshash = &dump('roles',$udom,$unam,$courseid);
1285: foreach my $key (keys(%roleshash)) {
1286: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
1287: my $section=$1;
1288: if ($key eq $courseid.'_st') { $section=''; }
1289: my ($dummy,$end,$start)=split(/\_/,&unescape($roleshash{$key}));
1290: my $now=time;
1291: if (defined($end) && $end && ($now > $end)) {
1292: $Expired{$end}=$section;
1293: next;
1294: }
1295: if (defined($start) && $start && ($now < $start)) {
1296: $Pending{$start}=$section;
1297: next;
1298: }
1299: return &do_cache_new('getsection',$hashid,$section,$cachetime);
1300: }
1301: #
1302: # Presumedly there will be few matching roles from the above
1303: # loop and the sorting time will be negligible.
1304: if (scalar(keys(%Pending))) {
1305: my ($time) = sort {$a <=> $b} keys(%Pending);
1306: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
1307: }
1308: if (scalar(keys(%Expired))) {
1309: my @sorted = sort {$a <=> $b} keys(%Expired);
1310: my $time = pop(@sorted);
1311: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
1312: }
1313: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
1314: }
1315:
1316: sub save_cache {
1317: &purge_remembered();
1318: #&Apache::loncommon::validate_page();
1319: undef(%env);
1320: undef($env_loaded);
1321: }
1322:
1323: my $to_remember=-1;
1324: my %remembered;
1325: my %accessed;
1326: my $kicks=0;
1327: my $hits=0;
1328: sub make_key {
1329: my ($name,$id) = @_;
1330: if (length($id) > 65
1331: && length(&escape($id)) > 200) {
1332: $id=length($id).':'.&Digest::MD5::md5_hex($id);
1333: }
1334: return &escape($name.':'.$id);
1335: }
1336:
1337: sub devalidate_cache_new {
1338: my ($name,$id,$debug) = @_;
1339: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
1340: $id=&make_key($name,$id);
1341: $memcache->delete($id);
1342: delete($remembered{$id});
1343: delete($accessed{$id});
1344: }
1345:
1346: sub is_cached_new {
1347: my ($name,$id,$debug) = @_;
1348: $id=&make_key($name,$id);
1349: if (exists($remembered{$id})) {
1350: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
1351: $accessed{$id}=[&gettimeofday()];
1352: $hits++;
1353: return ($remembered{$id},1);
1354: }
1355: my $value = $memcache->get($id);
1356: if (!(defined($value))) {
1357: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
1358: return (undef,undef);
1359: }
1360: if ($value eq '__undef__') {
1361: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
1362: $value=undef;
1363: }
1364: &make_room($id,$value,$debug);
1365: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
1366: return ($value,1);
1367: }
1368:
1369: sub do_cache_new {
1370: my ($name,$id,$value,$time,$debug) = @_;
1371: $id=&make_key($name,$id);
1372: my $setvalue=$value;
1373: if (!defined($setvalue)) {
1374: $setvalue='__undef__';
1375: }
1376: if (!defined($time) ) {
1377: $time=600;
1378: }
1379: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
1380: my $result = $memcache->set($id,$setvalue,$time);
1381: if (! $result) {
1382: &logthis("caching of id -> $id failed");
1383: $memcache->disconnect_all();
1384: }
1385: # need to make a copy of $value
1386: #&make_room($id,$value,$debug);
1387: return $value;
1388: }
1389:
1390: sub make_room {
1391: my ($id,$value,$debug)=@_;
1392: $remembered{$id}=$value;
1393: if ($to_remember<0) { return; }
1394: $accessed{$id}=[&gettimeofday()];
1395: if (scalar(keys(%remembered)) <= $to_remember) { return; }
1396: my $to_kick;
1397: my $max_time=0;
1398: foreach my $other (keys(%accessed)) {
1399: if (&tv_interval($accessed{$other}) > $max_time) {
1400: $to_kick=$other;
1401: $max_time=&tv_interval($accessed{$other});
1402: }
1403: }
1404: delete($remembered{$to_kick});
1405: delete($accessed{$to_kick});
1406: $kicks++;
1407: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
1408: return;
1409: }
1410:
1411: sub purge_remembered {
1412: #&logthis("Tossing ".scalar(keys(%remembered)));
1413: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
1414: undef(%remembered);
1415: undef(%accessed);
1416: }
1417: # ------------------------------------- Read an entry from a user's environment
1418:
1419: sub userenvironment {
1420: my ($udom,$unam,@what)=@_;
1421: my %returnhash=();
1422: my @answer=split(/\&/,
1423: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1424: &homeserver($unam,$udom)));
1425: my $i;
1426: for ($i=0;$i<=$#what;$i++) {
1427: $returnhash{$what[$i]}=&unescape($answer[$i]);
1428: }
1429: return %returnhash;
1430: }
1431:
1432: # ---------------------------------------------------------- Get a studentphoto
1433: sub studentphoto {
1434: my ($udom,$unam,$ext) = @_;
1435: my $home=&Apache::lonnet::homeserver($unam,$udom);
1436: if (defined($env{'request.course.id'})) {
1437: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
1438: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
1439: return(&retrievestudentphoto($udom,$unam,$ext));
1440: } else {
1441: my ($result,$perm_reqd)=
1442: &Apache::lonnet::auto_photo_permission($unam,$udom);
1443: if ($result eq 'ok') {
1444: if (!($perm_reqd eq 'yes')) {
1445: return(&retrievestudentphoto($udom,$unam,$ext));
1446: }
1447: }
1448: }
1449: }
1450: } else {
1451: my ($result,$perm_reqd) =
1452: &Apache::lonnet::auto_photo_permission($unam,$udom);
1453: if ($result eq 'ok') {
1454: if (!($perm_reqd eq 'yes')) {
1455: return(&retrievestudentphoto($udom,$unam,$ext));
1456: }
1457: }
1458: }
1459: return '/adm/lonKaputt/lonlogo_broken.gif';
1460: }
1461:
1462: sub retrievestudentphoto {
1463: my ($udom,$unam,$ext,$type) = @_;
1464: my $home=&Apache::lonnet::homeserver($unam,$udom);
1465: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1466: if ($ret eq 'ok') {
1467: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1468: if ($type eq 'thumbnail') {
1469: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1470: }
1471: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1472: return $tokenurl;
1473: } else {
1474: if ($type eq 'thumbnail') {
1475: return '/adm/lonKaputt/genericstudent_tn.gif';
1476: } else {
1477: return '/adm/lonKaputt/lonlogo_broken.gif';
1478: }
1479: }
1480: }
1481:
1482: # -------------------------------------------------------------------- New chat
1483:
1484: sub chatsend {
1485: my ($newentry,$anon,$group)=@_;
1486: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1487: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1488: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1489: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1490: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1491: &escape($newentry)).':'.$group,$chome);
1492: }
1493:
1494: # ------------------------------------------ Find current version of a resource
1495:
1496: sub getversion {
1497: my $fname=&clutter(shift);
1498: unless ($fname=~/^\/res\//) { return -1; }
1499: return ¤tversion(&filelocation('',$fname));
1500: }
1501:
1502: sub currentversion {
1503: my $fname=shift;
1504: my ($result,$cached)=&is_cached_new('resversion',$fname);
1505: if (defined($cached)) { return $result; }
1506: my $author=$fname;
1507: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1508: my ($udom,$uname)=split(/\//,$author);
1509: my $home=homeserver($uname,$udom);
1510: if ($home eq 'no_host') {
1511: return -1;
1512: }
1513: my $answer=reply("currentversion:$fname",$home);
1514: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1515: return -1;
1516: }
1517: return &do_cache_new('resversion',$fname,$answer,600);
1518: }
1519:
1520: # ----------------------------- Subscribe to a resource, return URL if possible
1521:
1522: sub subscribe {
1523: my $fname=shift;
1524: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1525: $fname=~s/[\n\r]//g;
1526: my $author=$fname;
1527: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1528: my ($udom,$uname)=split(/\//,$author);
1529: my $home=homeserver($uname,$udom);
1530: if ($home eq 'no_host') {
1531: return 'not_found';
1532: }
1533: my $answer=reply("sub:$fname",$home);
1534: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1535: $answer.=' by '.$home;
1536: }
1537: return $answer;
1538: }
1539:
1540: # -------------------------------------------------------------- Replicate file
1541:
1542: sub repcopy {
1543: my $filename=shift;
1544: $filename=~s/\/+/\//g;
1545: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1546: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1547: if ($filename=~m|^/home/httpd/html/userfiles/| or
1548: $filename=~m -^/*(uploaded|editupload)/-) {
1549: return &repcopy_userfile($filename);
1550: }
1551: $filename=~s/[\n\r]//g;
1552: my $transname="$filename.in.transfer";
1553: # FIXME: this should flock
1554: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1555: my $remoteurl=subscribe($filename);
1556: if ($remoteurl =~ /^con_lost by/) {
1557: &logthis("Subscribe returned $remoteurl: $filename");
1558: return 'unavailable';
1559: } elsif ($remoteurl eq 'not_found') {
1560: #&logthis("Subscribe returned not_found: $filename");
1561: return 'not_found';
1562: } elsif ($remoteurl =~ /^rejected by/) {
1563: &logthis("Subscribe returned $remoteurl: $filename");
1564: return 'forbidden';
1565: } elsif ($remoteurl eq 'directory') {
1566: return 'ok';
1567: } else {
1568: my $author=$filename;
1569: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1570: my ($udom,$uname)=split(/\//,$author);
1571: my $home=homeserver($uname,$udom);
1572: unless ($home eq $perlvar{'lonHostID'}) {
1573: my @parts=split(/\//,$filename);
1574: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1575: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1576: &logthis("Malconfiguration for replication: $filename");
1577: return 'bad_request';
1578: }
1579: my $count;
1580: for ($count=5;$count<$#parts;$count++) {
1581: $path.="/$parts[$count]";
1582: if ((-e $path)!=1) {
1583: mkdir($path,0777);
1584: }
1585: }
1586: my $ua=new LWP::UserAgent;
1587: my $request=new HTTP::Request('GET',"$remoteurl");
1588: my $response=$ua->request($request,$transname);
1589: if ($response->is_error()) {
1590: unlink($transname);
1591: my $message=$response->status_line;
1592: &logthis("<font color=\"blue\">WARNING:"
1593: ." LWP get: $message: $filename</font>");
1594: return 'unavailable';
1595: } else {
1596: if ($remoteurl!~/\.meta$/) {
1597: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1598: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1599: if ($mresponse->is_error()) {
1600: unlink($filename.'.meta');
1601: &logthis(
1602: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1603: }
1604: }
1605: rename($transname,$filename);
1606: return 'ok';
1607: }
1608: }
1609: }
1610: }
1611:
1612: # ------------------------------------------------ Get server side include body
1613: sub ssi_body {
1614: my ($filelink,%form)=@_;
1615: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1616: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1617: }
1618: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1619: &ssi($filelink,%form));
1620: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
1621: $output=~s/^.*?\<body[^\>]*\>//si;
1622: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1623: return $output;
1624: }
1625:
1626: # --------------------------------------------------------- Server Side Include
1627:
1628: sub absolute_url {
1629: my ($host_name) = @_;
1630: my $protocol = ($ENV{'SERVER_PORT'} == 443?'https://':'http://');
1631: if ($host_name eq '') {
1632: $host_name = $ENV{'SERVER_NAME'};
1633: }
1634: return $protocol.$host_name;
1635: }
1636:
1637: sub ssi {
1638:
1639: my ($fn,%form)=@_;
1640:
1641: my $ua=new LWP::UserAgent;
1642:
1643: my $request;
1644:
1645: $form{'no_update_last_known'}=1;
1646: &Apache::lonenc::check_encrypt(\$fn);
1647: if (%form) {
1648: $request=new HTTP::Request('POST',&absolute_url().$fn);
1649: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1650: } else {
1651: $request=new HTTP::Request('GET',&absolute_url().$fn);
1652: }
1653:
1654: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1655: my $response=$ua->request($request);
1656:
1657: return $response->content;
1658: }
1659:
1660: sub externalssi {
1661: my ($url)=@_;
1662: my $ua=new LWP::UserAgent;
1663: my $request=new HTTP::Request('GET',$url);
1664: my $response=$ua->request($request);
1665: return $response->content;
1666: }
1667:
1668: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1669:
1670: sub allowuploaded {
1671: my ($srcurl,$url)=@_;
1672: $url=&clutter(&declutter($url));
1673: my $dir=$url;
1674: $dir=~s/\/[^\/]+$//;
1675: my %httpref=();
1676: my $httpurl=&hreflocation('',$url);
1677: $httpref{'httpref.'.$httpurl}=$srcurl;
1678: &Apache::lonnet::appenv(%httpref);
1679: }
1680:
1681: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1682: # input: action, courseID, current domain, intended
1683: # path to file, source of file, instruction to parse file for objects,
1684: # ref to hash for embedded objects,
1685: # ref to hash for codebase of java objects.
1686: #
1687: # output: url to file (if action was uploaddoc),
1688: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1689: #
1690: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1691: # course.
1692: #
1693: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1694: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1695: # course's home server.
1696: #
1697: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1698: # be copied from $source (current location) to
1699: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1700: # and will then be copied to
1701: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1702: # course's home server.
1703: #
1704: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1705: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1706: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1707: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1708: # in course's home server.
1709: #
1710:
1711: sub process_coursefile {
1712: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1713: my $fetchresult;
1714: my $home=&homeserver($docuname,$docudom);
1715: if ($action eq 'propagate') {
1716: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1717: $home);
1718: } else {
1719: my $fpath = '';
1720: my $fname = $file;
1721: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1722: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1723: my $filepath = &build_filepath($fpath);
1724: if ($action eq 'copy') {
1725: if ($source eq '') {
1726: $fetchresult = 'no source file';
1727: return $fetchresult;
1728: } else {
1729: my $destination = $filepath.'/'.$fname;
1730: rename($source,$destination);
1731: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1732: $home);
1733: }
1734: } elsif ($action eq 'uploaddoc') {
1735: open(my $fh,'>'.$filepath.'/'.$fname);
1736: print $fh $env{'form.'.$source};
1737: close($fh);
1738: if ($parser eq 'parse') {
1739: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1740: unless ($parse_result eq 'ok') {
1741: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1742: }
1743: }
1744: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1745: $home);
1746: if ($fetchresult eq 'ok') {
1747: return '/uploaded/'.$fpath.'/'.$fname;
1748: } else {
1749: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1750: ' to host '.$home.': '.$fetchresult);
1751: return '/adm/notfound.html';
1752: }
1753: }
1754: }
1755: unless ( $fetchresult eq 'ok') {
1756: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1757: ' to host '.$home.': '.$fetchresult);
1758: }
1759: return $fetchresult;
1760: }
1761:
1762: sub build_filepath {
1763: my ($fpath) = @_;
1764: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1765: unless ($fpath eq '') {
1766: my @parts=split('/',$fpath);
1767: foreach my $part (@parts) {
1768: $filepath.= '/'.$part;
1769: if ((-e $filepath)!=1) {
1770: mkdir($filepath,0777);
1771: }
1772: }
1773: }
1774: return $filepath;
1775: }
1776:
1777: sub store_edited_file {
1778: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1779: my $file = $primary_url;
1780: $file =~ s#^/uploaded/$docudom/$docuname/##;
1781: my $fpath = '';
1782: my $fname = $file;
1783: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1784: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1785: my $filepath = &build_filepath($fpath);
1786: open(my $fh,'>'.$filepath.'/'.$fname);
1787: print $fh $content;
1788: close($fh);
1789: my $home=&homeserver($docuname,$docudom);
1790: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1791: $home);
1792: if ($$fetchresult eq 'ok') {
1793: return '/uploaded/'.$fpath.'/'.$fname;
1794: } else {
1795: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1796: ' to host '.$home.': '.$$fetchresult);
1797: return '/adm/notfound.html';
1798: }
1799: }
1800:
1801: sub clean_filename {
1802: my ($fname,$args)=@_;
1803: # Replace Windows backslashes by forward slashes
1804: $fname=~s/\\/\//g;
1805: if (!$args->{'keep_path'}) {
1806: # Get rid of everything but the actual filename
1807: $fname=~s/^.*\/([^\/]+)$/$1/;
1808: }
1809: # Replace spaces by underscores
1810: $fname=~s/\s+/\_/g;
1811: # Replace all other weird characters by nothing
1812: $fname=~s{[^/\w\.\-]}{}g;
1813: # Replace all .\d. sequences with _\d. so they no longer look like version
1814: # numbers
1815: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1816: return $fname;
1817: }
1818:
1819: # --------------- Take an uploaded file and put it into the userfiles directory
1820: # input: $formname - the contents of the file are in $env{"form.$formname"}
1821: # the desired filenam is in $env{"form.$formname.filename"}
1822: # $coursedoc - if true up to the current course
1823: # if false
1824: # $subdir - directory in userfile to store the file into
1825: # $parser - instruction to parse file for objects ($parser = parse)
1826: # $allfiles - reference to hash for embedded objects
1827: # $codebase - reference to hash for codebase of java objects
1828: # $desuname - username for permanent storage of uploaded file
1829: # $dsetudom - domain for permanaent storage of uploaded file
1830: # $thumbwidth - width (pixels) of thumbnail to make for uploaded image
1831: # $thumbheight - height (pixels) of thumbnail to make for uploaded image
1832: #
1833: # output: url of file in userspace, or error: <message>
1834: # or /adm/notfound.html if failure to upload occurse
1835:
1836:
1837: sub userfileupload {
1838: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,
1839: $destudom,$thumbwidth,$thumbheight)=@_;
1840: if (!defined($subdir)) { $subdir='unknown'; }
1841: my $fname=$env{'form.'.$formname.'.filename'};
1842: $fname=&clean_filename($fname);
1843: # See if there is anything left
1844: unless ($fname) { return 'error: no uploaded file'; }
1845: chop($env{'form.'.$formname});
1846: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1847: my $now = time;
1848: my $filepath = 'tmp/helprequests/'.$now;
1849: my @parts=split(/\//,$filepath);
1850: my $fullpath = $perlvar{'lonDaemons'};
1851: for (my $i=0;$i<@parts;$i++) {
1852: $fullpath .= '/'.$parts[$i];
1853: if ((-e $fullpath)!=1) {
1854: mkdir($fullpath,0777);
1855: }
1856: }
1857: open(my $fh,'>'.$fullpath.'/'.$fname);
1858: print $fh $env{'form.'.$formname};
1859: close($fh);
1860: return $fullpath.'/'.$fname;
1861: } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
1862: my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
1863: '_'.$env{'user.domain'}.'/pending';
1864: my @parts=split(/\//,$filepath);
1865: my $fullpath = $perlvar{'lonDaemons'};
1866: for (my $i=0;$i<@parts;$i++) {
1867: $fullpath .= '/'.$parts[$i];
1868: if ((-e $fullpath)!=1) {
1869: mkdir($fullpath,0777);
1870: }
1871: }
1872: open(my $fh,'>'.$fullpath.'/'.$fname);
1873: print $fh $env{'form.'.$formname};
1874: close($fh);
1875: return $fullpath.'/'.$fname;
1876: }
1877:
1878: # Create the directory if not present
1879: $fname="$subdir/$fname";
1880: if ($coursedoc) {
1881: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1882: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1883: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1884: return &finishuserfileupload($docuname,$docudom,
1885: $formname,$fname,$parser,$allfiles,
1886: $codebase,$thumbwidth,$thumbheight);
1887: } else {
1888: $fname=$env{'form.folder'}.'/'.$fname;
1889: return &process_coursefile('uploaddoc',$docuname,$docudom,
1890: $fname,$formname,$parser,
1891: $allfiles,$codebase);
1892: }
1893: } elsif (defined($destuname)) {
1894: my $docuname=$destuname;
1895: my $docudom=$destudom;
1896: return &finishuserfileupload($docuname,$docudom,$formname,$fname,
1897: $parser,$allfiles,$codebase,
1898: $thumbwidth,$thumbheight);
1899:
1900: } else {
1901: my $docuname=$env{'user.name'};
1902: my $docudom=$env{'user.domain'};
1903: if (exists($env{'form.group'})) {
1904: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1905: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1906: }
1907: return &finishuserfileupload($docuname,$docudom,$formname,$fname,
1908: $parser,$allfiles,$codebase,
1909: $thumbwidth,$thumbheight);
1910: }
1911: }
1912:
1913: sub finishuserfileupload {
1914: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase,
1915: $thumbwidth,$thumbheight) = @_;
1916: my $path=$docudom.'/'.$docuname.'/';
1917: my $filepath=$perlvar{'lonDocRoot'};
1918: my ($fnamepath,$file,$fetchthumb);
1919: $file=$fname;
1920: if ($fname=~m|/|) {
1921: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1922: $path.=$fnamepath.'/';
1923: }
1924: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1925: my $count;
1926: for ($count=4;$count<=$#parts;$count++) {
1927: $filepath.="/$parts[$count]";
1928: if ((-e $filepath)!=1) {
1929: mkdir($filepath,0777);
1930: }
1931: }
1932: # Save the file
1933: {
1934: if (!open(FH,'>'.$filepath.'/'.$file)) {
1935: &logthis('Failed to create '.$filepath.'/'.$file);
1936: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1937: return '/adm/notfound.html';
1938: }
1939: if (!print FH ($env{'form.'.$formname})) {
1940: &logthis('Failed to write to '.$filepath.'/'.$file);
1941: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1942: return '/adm/notfound.html';
1943: }
1944: close(FH);
1945: }
1946: if ($parser eq 'parse') {
1947: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1948: $codebase);
1949: unless ($parse_result eq 'ok') {
1950: &logthis('Failed to parse '.$filepath.$file.
1951: ' for embedded media: '.$parse_result);
1952: }
1953: }
1954: if (($thumbwidth =~ /^\d+$/) && ($thumbheight =~ /^\d+$/)) {
1955: my $input = $filepath.'/'.$file;
1956: my $output = $filepath.'/'.'tn-'.$file;
1957: my $thumbsize = $thumbwidth.'x'.$thumbheight;
1958: system("convert -sample $thumbsize $input $output");
1959: if (-e $filepath.'/'.'tn-'.$file) {
1960: $fetchthumb = 1;
1961: }
1962: }
1963:
1964: # Notify homeserver to grep it
1965: #
1966: my $docuhome=&homeserver($docuname,$docudom);
1967: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1968: if ($fetchresult eq 'ok') {
1969: if ($fetchthumb) {
1970: my $thumbresult= &reply('fetchuserfile:'.$path.'tn-'.$file,$docuhome);
1971: if ($thumbresult ne 'ok') {
1972: &logthis('Failed to transfer '.$path.'tn-'.$file.' to host '.
1973: $docuhome.': '.$thumbresult);
1974: }
1975: }
1976: #
1977: # Return the URL to it
1978: return '/uploaded/'.$path.$file;
1979: } else {
1980: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1981: ': '.$fetchresult);
1982: return '/adm/notfound.html';
1983: }
1984: }
1985:
1986: sub extract_embedded_items {
1987: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1988: my @state = ();
1989: my %javafiles = (
1990: codebase => '',
1991: code => '',
1992: archive => ''
1993: );
1994: my %mediafiles = (
1995: src => '',
1996: movie => '',
1997: );
1998: my $p;
1999: if ($content) {
2000: $p = HTML::LCParser->new($content);
2001: } else {
2002: $p = HTML::LCParser->new($filepath.'/'.$file);
2003: }
2004: while (my $t=$p->get_token()) {
2005: if ($t->[0] eq 'S') {
2006: my ($tagname, $attr) = ($t->[1],$t->[2]);
2007: push(@state, $tagname);
2008: if (lc($tagname) eq 'allow') {
2009: &add_filetype($allfiles,$attr->{'src'},'src');
2010: }
2011: if (lc($tagname) eq 'img') {
2012: &add_filetype($allfiles,$attr->{'src'},'src');
2013: }
2014: if (lc($tagname) eq 'a') {
2015: &add_filetype($allfiles,$attr->{'href'},'href');
2016: }
2017: if (lc($tagname) eq 'script') {
2018: if ($attr->{'archive'} =~ /\.jar$/i) {
2019: &add_filetype($allfiles,$attr->{'archive'},'archive');
2020: } else {
2021: &add_filetype($allfiles,$attr->{'src'},'src');
2022: }
2023: }
2024: if (lc($tagname) eq 'link') {
2025: if (lc($attr->{'rel'}) eq 'stylesheet') {
2026: &add_filetype($allfiles,$attr->{'href'},'href');
2027: }
2028: }
2029: if (lc($tagname) eq 'object' ||
2030: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
2031: foreach my $item (keys(%javafiles)) {
2032: $javafiles{$item} = '';
2033: }
2034: }
2035: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
2036: my $name = lc($attr->{'name'});
2037: foreach my $item (keys(%javafiles)) {
2038: if ($name eq $item) {
2039: $javafiles{$item} = $attr->{'value'};
2040: last;
2041: }
2042: }
2043: foreach my $item (keys(%mediafiles)) {
2044: if ($name eq $item) {
2045: &add_filetype($allfiles, $attr->{'value'}, 'value');
2046: last;
2047: }
2048: }
2049: }
2050: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
2051: foreach my $item (keys(%javafiles)) {
2052: if ($attr->{$item}) {
2053: $javafiles{$item} = $attr->{$item};
2054: last;
2055: }
2056: }
2057: foreach my $item (keys(%mediafiles)) {
2058: if ($attr->{$item}) {
2059: &add_filetype($allfiles,$attr->{$item},$item);
2060: last;
2061: }
2062: }
2063: }
2064: } elsif ($t->[0] eq 'E') {
2065: my ($tagname) = ($t->[1]);
2066: if ($javafiles{'codebase'} ne '') {
2067: $javafiles{'codebase'} .= '/';
2068: }
2069: if (lc($tagname) eq 'applet' ||
2070: lc($tagname) eq 'object' ||
2071: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
2072: ) {
2073: foreach my $item (keys(%javafiles)) {
2074: if ($item ne 'codebase' && $javafiles{$item} ne '') {
2075: my $file=$javafiles{'codebase'}.$javafiles{$item};
2076: &add_filetype($allfiles,$file,$item);
2077: }
2078: }
2079: }
2080: pop @state;
2081: }
2082: }
2083: return 'ok';
2084: }
2085:
2086: sub add_filetype {
2087: my ($allfiles,$file,$type)=@_;
2088: if (exists($allfiles->{$file})) {
2089: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
2090: push(@{$allfiles->{$file}}, &escape($type));
2091: }
2092: } else {
2093: @{$allfiles->{$file}} = (&escape($type));
2094: }
2095: }
2096:
2097: sub removeuploadedurl {
2098: my ($url)=@_;
2099: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
2100: return &removeuserfile($uname,$udom,$fname);
2101: }
2102:
2103: sub removeuserfile {
2104: my ($docuname,$docudom,$fname)=@_;
2105: my $home=&homeserver($docuname,$docudom);
2106: my $result = &reply("removeuserfile:$docudom/$docuname/$fname",$home);
2107: if ($result eq 'ok') {
2108: if (($fname !~ /\.meta$/) && (&is_portfolio_file($fname))) {
2109: my $metafile = $fname.'.meta';
2110: my $metaresult = &removeuserfile($docuname,$docudom,$metafile);
2111: my $url = "/uploaded/$docudom/$docuname/$fname";
2112: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
2113: my $sqlresult =
2114: &update_portfolio_table($docuname,$docudom,$file,
2115: 'portfolio_metadata',$group,
2116: 'delete');
2117: }
2118: }
2119: return $result;
2120: }
2121:
2122: sub mkdiruserfile {
2123: my ($docuname,$docudom,$dir)=@_;
2124: my $home=&homeserver($docuname,$docudom);
2125: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
2126: }
2127:
2128: sub renameuserfile {
2129: my ($docuname,$docudom,$old,$new)=@_;
2130: my $home=&homeserver($docuname,$docudom);
2131: my $result = &reply("renameuserfile:$docudom:$docuname:".
2132: &escape("$old").':'.&escape("$new"),$home);
2133: if ($result eq 'ok') {
2134: if (($old !~ /\.meta$/) && (&is_portfolio_file($old))) {
2135: my $oldmeta = $old.'.meta';
2136: my $newmeta = $new.'.meta';
2137: my $metaresult =
2138: &renameuserfile($docuname,$docudom,$oldmeta,$newmeta);
2139: my $url = "/uploaded/$docudom/$docuname/$old";
2140: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
2141: my $sqlresult =
2142: &update_portfolio_table($docuname,$docudom,$file,
2143: 'portfolio_metadata',$group,
2144: 'delete');
2145: }
2146: }
2147: return $result;
2148: }
2149:
2150: # ------------------------------------------------------------------------- Log
2151:
2152: sub log {
2153: my ($dom,$nam,$hom,$what)=@_;
2154: return critical("log:$dom:$nam:$what",$hom);
2155: }
2156:
2157: # ------------------------------------------------------------------ Course Log
2158: #
2159: # This routine flushes several buffers of non-mission-critical nature
2160: #
2161:
2162: sub flushcourselogs {
2163: &logthis('Flushing log buffers');
2164: #
2165: # course logs
2166: # This is a log of all transactions in a course, which can be used
2167: # for data mining purposes
2168: #
2169: # It also collects the courseid database, which lists last transaction
2170: # times and course titles for all courseids
2171: #
2172: my %courseidbuffer=();
2173: foreach my $crsid (keys %courselogs) {
2174: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
2175: &escape($courselogs{$crsid}),
2176: $coursehombuf{$crsid}) eq 'ok') {
2177: delete $courselogs{$crsid};
2178: } else {
2179: &logthis('Failed to flush log buffer for '.$crsid);
2180: if (length($courselogs{$crsid})>40000) {
2181: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
2182: " exceeded maximum size, deleting.</font>");
2183: delete $courselogs{$crsid};
2184: }
2185: }
2186: if ($courseidbuffer{$coursehombuf{$crsid}}) {
2187: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
2188: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
2189: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
2190: } else {
2191: $courseidbuffer{$coursehombuf{$crsid}}=
2192: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
2193: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
2194: }
2195: }
2196: #
2197: # Write course id database (reverse lookup) to homeserver of courses
2198: # Is used in pickcourse
2199: #
2200: foreach my $crs_home (keys(%courseidbuffer)) {
2201: &courseidput(&host_domain($crs_home),$courseidbuffer{$crs_home},
2202: $crs_home);
2203: }
2204: #
2205: # File accesses
2206: # Writes to the dynamic metadata of resources to get hit counts, etc.
2207: #
2208: foreach my $entry (keys(%accesshash)) {
2209: if ($entry =~ /___count$/) {
2210: my ($dom,$name);
2211: ($dom,$name,undef)=
2212: ($entry=~m{___($match_domain)/($match_name)/(.*)___count$});
2213: if (! defined($dom) || $dom eq '' ||
2214: ! defined($name) || $name eq '') {
2215: my $cid = $env{'request.course.id'};
2216: $dom = $env{'request.'.$cid.'.domain'};
2217: $name = $env{'request.'.$cid.'.num'};
2218: }
2219: my $value = $accesshash{$entry};
2220: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
2221: my %temphash=($url => $value);
2222: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
2223: if ($result eq 'ok') {
2224: delete $accesshash{$entry};
2225: } elsif ($result eq 'unknown_cmd') {
2226: # Target server has old code running on it.
2227: my %temphash=($entry => $value);
2228: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
2229: delete $accesshash{$entry};
2230: }
2231: }
2232: } else {
2233: my ($dom,$name) = ($entry=~m{___($match_domain)/($match_name)/(.*)___(\w+)$});
2234: my %temphash=($entry => $accesshash{$entry});
2235: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
2236: delete $accesshash{$entry};
2237: }
2238: }
2239: }
2240: #
2241: # Roles
2242: # Reverse lookup of user roles for course faculty/staff and co-authorship
2243: #
2244: foreach my $entry (keys(%userrolehash)) {
2245: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
2246: split(/\:/,$entry);
2247: if (&Apache::lonnet::put('nohist_userroles',
2248: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
2249: $rudom,$runame) eq 'ok') {
2250: delete $userrolehash{$entry};
2251: }
2252: }
2253: #
2254: # Reverse lookup of domain roles (dc, ad, li, sc, au)
2255: #
2256: my %domrolebuffer = ();
2257: foreach my $entry (keys %domainrolehash) {
2258: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split(/:/,$entry);
2259: if ($domrolebuffer{$rudom}) {
2260: $domrolebuffer{$rudom}.='&'.&escape($entry).
2261: '='.&escape($domainrolehash{$entry});
2262: } else {
2263: $domrolebuffer{$rudom}.=&escape($entry).
2264: '='.&escape($domainrolehash{$entry});
2265: }
2266: delete $domainrolehash{$entry};
2267: }
2268: foreach my $dom (keys(%domrolebuffer)) {
2269: my %servers = &get_servers($dom,'library');
2270: foreach my $tryserver (keys(%servers)) {
2271: unless (&reply('domroleput:'.$dom.':'.
2272: $domrolebuffer{$dom},$tryserver) eq 'ok') {
2273: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
2274: }
2275: }
2276: }
2277: $dumpcount++;
2278: }
2279:
2280: sub courselog {
2281: my $what=shift;
2282: $what=time.':'.$what;
2283: unless ($env{'request.course.id'}) { return ''; }
2284: $coursedombuf{$env{'request.course.id'}}=
2285: $env{'course.'.$env{'request.course.id'}.'.domain'};
2286: $coursenumbuf{$env{'request.course.id'}}=
2287: $env{'course.'.$env{'request.course.id'}.'.num'};
2288: $coursehombuf{$env{'request.course.id'}}=
2289: $env{'course.'.$env{'request.course.id'}.'.home'};
2290: $coursedescrbuf{$env{'request.course.id'}}=
2291: $env{'course.'.$env{'request.course.id'}.'.description'};
2292: $courseinstcodebuf{$env{'request.course.id'}}=
2293: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
2294: $courseownerbuf{$env{'request.course.id'}}=
2295: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
2296: $coursetypebuf{$env{'request.course.id'}}=
2297: $env{'course.'.$env{'request.course.id'}.'.type'};
2298: if (defined $courselogs{$env{'request.course.id'}}) {
2299: $courselogs{$env{'request.course.id'}}.='&'.$what;
2300: } else {
2301: $courselogs{$env{'request.course.id'}}.=$what;
2302: }
2303: if (length($courselogs{$env{'request.course.id'}})>4048) {
2304: &flushcourselogs();
2305: }
2306: }
2307:
2308: sub courseacclog {
2309: my $fnsymb=shift;
2310: unless ($env{'request.course.id'}) { return ''; }
2311: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
2312: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
2313: $what.=':POST';
2314: # FIXME: Probably ought to escape things....
2315: foreach my $key (keys(%env)) {
2316: if ($key=~/^form\.(.*)/) {
2317: $what.=':'.$1.'='.$env{$key};
2318: }
2319: }
2320: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
2321: # FIXME: We should not be depending on a form parameter that someone
2322: # editing lonsearchcat.pm might change in the future.
2323: if ($env{'form.phase'} eq 'course_search') {
2324: $what.= ':POST';
2325: # FIXME: Probably ought to escape things....
2326: foreach my $element ('courseexp','crsfulltext','crsrelated',
2327: 'crsdiscuss') {
2328: $what.=':'.$element.'='.$env{'form.'.$element};
2329: }
2330: }
2331: }
2332: &courselog($what);
2333: }
2334:
2335: sub countacc {
2336: my $url=&declutter(shift);
2337: return if (! defined($url) || $url eq '');
2338: unless ($env{'request.course.id'}) { return ''; }
2339: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
2340: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
2341: $accesshash{$key}++;
2342: }
2343:
2344: sub linklog {
2345: my ($from,$to)=@_;
2346: $from=&declutter($from);
2347: $to=&declutter($to);
2348: $accesshash{$from.'___'.$to.'___comefrom'}=1;
2349: $accesshash{$to.'___'.$from.'___goto'}=1;
2350: }
2351:
2352: sub userrolelog {
2353: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
2354: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
2355: ($trole=~/^in/) || ($trole=~/^cc/) ||
2356: ($trole=~/^ep/) || ($trole=~/^cr/) ||
2357: ($trole=~/^ta/)) {
2358: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2359: $userrolehash
2360: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2361: =$tend.':'.$tstart;
2362: }
2363: if (($env{'request.role'} =~ /dc\./) &&
2364: (($trole=~/^au/) || ($trole=~/^in/) ||
2365: ($trole=~/^cc/) || ($trole=~/^ep/) ||
2366: ($trole=~/^cr/) || ($trole=~/^ta/))) {
2367: $userrolehash
2368: {$trole.':'.$username.':'.$domain.':'.$env{'user.name'}.':'.$env{'user.domain'}.':'}
2369: =$tend.':'.$tstart;
2370: }
2371: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
2372: ($trole=~/^li/) || ($trole=~/^li/) ||
2373: ($trole=~/^au/) || ($trole=~/^dg/) ||
2374: ($trole=~/^sc/)) {
2375: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2376: $domainrolehash
2377: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2378: = $tend.':'.$tstart;
2379: }
2380: }
2381:
2382: sub get_course_adv_roles {
2383: my $cid=shift;
2384: $cid=$env{'request.course.id'} unless (defined($cid));
2385: my %coursehash=&coursedescription($cid);
2386: my %nothide=();
2387: foreach my $user (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
2388: $nothide{join(':',split(/[\@\:]/,$user))}=1;
2389: }
2390: my %returnhash=();
2391: my %dumphash=
2392: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
2393: my $now=time;
2394: foreach my $entry (keys %dumphash) {
2395: my ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2396: if (($tstart) && ($tstart<0)) { next; }
2397: if (($tend) && ($tend<$now)) { next; }
2398: if (($tstart) && ($now<$tstart)) { next; }
2399: my ($role,$username,$domain,$section)=split(/\:/,$entry);
2400: if ($username eq '' || $domain eq '') { next; }
2401: if ((&privileged($username,$domain)) &&
2402: (!$nothide{$username.':'.$domain})) { next; }
2403: if ($role eq 'cr') { next; }
2404: my $key=&plaintext($role);
2405: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
2406: if ($returnhash{$key}) {
2407: $returnhash{$key}.=','.$username.':'.$domain;
2408: } else {
2409: $returnhash{$key}=$username.':'.$domain;
2410: }
2411: }
2412: return %returnhash;
2413: }
2414:
2415: sub get_my_roles {
2416: my ($uname,$udom,$context,$types,$roles,$roledoms)=@_;
2417: unless (defined($uname)) { $uname=$env{'user.name'}; }
2418: unless (defined($udom)) { $udom=$env{'user.domain'}; }
2419: my %dumphash;
2420: if ($context eq 'userroles') {
2421: %dumphash = &dump('roles',$udom,$uname);
2422: } else {
2423: %dumphash=
2424: &dump('nohist_userroles',$udom,$uname);
2425: }
2426: my %returnhash=();
2427: my $now=time;
2428: foreach my $entry (keys(%dumphash)) {
2429: my ($role,$tend,$tstart);
2430: if ($context eq 'userroles') {
2431: ($role,$tend,$tstart)=split(/_/,$dumphash{$entry});
2432: } else {
2433: ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2434: }
2435: if (($tstart) && ($tstart<0)) { next; }
2436: my $status = 'active';
2437: if (($tend) && ($tend<$now)) {
2438: $status = 'previous';
2439: }
2440: if (($tstart) && ($now<$tstart)) {
2441: $status = 'future';
2442: }
2443: if (ref($types) eq 'ARRAY') {
2444: if (!grep(/^\Q$status\E$/,@{$types})) {
2445: next;
2446: }
2447: } else {
2448: if ($status ne 'active') {
2449: next;
2450: }
2451: }
2452: my ($rolecode,$username,$domain,$section,$area);
2453: if ($context eq 'userroles') {
2454: ($area,$rolecode) = split(/_/,$entry);
2455: (undef,$domain,$username,$section) = split(/\//,$area);
2456: } else {
2457: ($role,$username,$domain,$section) = split(/\:/,$entry);
2458: }
2459: if (ref($roledoms) eq 'ARRAY') {
2460: if (!grep(/^\Q$domain\E$/,@{$roledoms})) {
2461: next;
2462: }
2463: }
2464: if (ref($roles) eq 'ARRAY') {
2465: if (!grep(/^\Q$role\E$/,@{$roles})) {
2466: next;
2467: }
2468: }
2469: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
2470: }
2471: return %returnhash;
2472: }
2473:
2474: # ----------------------------------------------------- Frontpage Announcements
2475: #
2476: #
2477:
2478: sub postannounce {
2479: my ($server,$text)=@_;
2480: unless (&allowed('psa',&host_domain($server))) { return 'refused'; }
2481: unless ($text=~/\w/) { $text=''; }
2482: return &reply('setannounce:'.&escape($text),$server);
2483: }
2484:
2485: sub getannounce {
2486:
2487: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
2488: my $announcement='';
2489: while (my $line = <$fh>) { $announcement .= $line; }
2490: close($fh);
2491: if ($announcement=~/\w/) {
2492: return
2493: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
2494: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
2495: } else {
2496: return '';
2497: }
2498: } else {
2499: return '';
2500: }
2501: }
2502:
2503: # ---------------------------------------------------------- Course ID routines
2504: # Deal with domain's nohist_courseid.db files
2505: #
2506:
2507: sub courseidput {
2508: my ($domain,$what,$coursehome)=@_;
2509: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
2510: }
2511:
2512: sub courseiddump {
2513: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref,$typefilter,$regexp_ok)=@_;
2514: my %returnhash=();
2515: unless ($domfilter) { $domfilter=''; }
2516: my %libserv = &all_library();
2517: foreach my $tryserver (keys(%libserv)) {
2518: if ( ( $hostidflag == 1
2519: && grep(/^\Q$tryserver\E$/,@{$hostidref}) )
2520: || (!defined($hostidflag)) ) {
2521:
2522: if ($domfilter eq ''
2523: || (&host_domain($tryserver) eq $domfilter)) {
2524: foreach my $line (
2525: split(/\&/,&reply('courseiddump:'.&host_domain($tryserver).':'.
2526: $sincefilter.':'.&escape($descfilter).':'.
2527: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter).':'.&escape($typefilter).':'.&escape($regexp_ok),
2528: $tryserver))) {
2529: my ($key,$value)=split(/\=/,$line,2);
2530: if (($key) && ($value)) {
2531: $returnhash{&unescape($key)}=$value;
2532: }
2533: }
2534: }
2535: }
2536: }
2537: return %returnhash;
2538: }
2539:
2540: # ---------------------------------------------------------- DC e-mail
2541:
2542: sub dcmailput {
2543: my ($domain,$msgid,$message,$server)=@_;
2544: my $status = &Apache::lonnet::critical(
2545: 'dcmailput:'.$domain.':'.&escape($msgid).'='.
2546: &escape($message),$server);
2547: return $status;
2548: }
2549:
2550: sub dcmaildump {
2551: my ($dom,$startdate,$enddate,$senders) = @_;
2552: my %returnhash=();
2553:
2554: if (defined(&domain($dom,'primary'))) {
2555: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
2556: &escape($enddate).':';
2557: my @esc_senders=map { &escape($_)} @$senders;
2558: $cmd.=&escape(join('&',@esc_senders));
2559: foreach my $line (split(/\&/,&reply($cmd,&domain($dom,'primary')))) {
2560: my ($key,$value) = split(/\=/,$line,2);
2561: if (($key) && ($value)) {
2562: $returnhash{&unescape($key)} = &unescape($value);
2563: }
2564: }
2565: }
2566: return %returnhash;
2567: }
2568: # ---------------------------------------------------------- Domain roles
2569:
2570: sub get_domain_roles {
2571: my ($dom,$roles,$startdate,$enddate)=@_;
2572: if (undef($startdate) || $startdate eq '') {
2573: $startdate = '.';
2574: }
2575: if (undef($enddate) || $enddate eq '') {
2576: $enddate = '.';
2577: }
2578: my $rolelist = join(':',@{$roles});
2579: my %personnel = ();
2580:
2581: my %servers = &get_servers($dom,'library');
2582: foreach my $tryserver (keys(%servers)) {
2583: %{$personnel{$tryserver}}=();
2584: foreach my $line (split(/\&/,&reply('domrolesdump:'.$dom.':'.
2585: &escape($startdate).':'.
2586: &escape($enddate).':'.
2587: &escape($rolelist), $tryserver))) {
2588: my ($key,$value) = split(/\=/,$line,2);
2589: if (($key) && ($value)) {
2590: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2591: }
2592: }
2593: }
2594: return %personnel;
2595: }
2596:
2597: # ----------------------------------------------------------- Check out an item
2598:
2599: sub get_first_access {
2600: my ($type,$argsymb)=@_;
2601: my ($symb,$courseid,$udom,$uname)=&whichuser();
2602: if ($argsymb) { $symb=$argsymb; }
2603: my ($map,$id,$res)=&decode_symb($symb);
2604: if ($type eq 'map') {
2605: $res=&symbread($map);
2606: } else {
2607: $res=$symb;
2608: }
2609: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2610: return $times{"$courseid\0$res"};
2611: }
2612:
2613: sub set_first_access {
2614: my ($type)=@_;
2615: my ($symb,$courseid,$udom,$uname)=&whichuser();
2616: my ($map,$id,$res)=&decode_symb($symb);
2617: if ($type eq 'map') {
2618: $res=&symbread($map);
2619: } else {
2620: $res=$symb;
2621: }
2622: my $firstaccess=&get_first_access($type,$symb);
2623: if (!$firstaccess) {
2624: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2625: }
2626: return 'already_set';
2627: }
2628:
2629: sub checkout {
2630: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2631: my $now=time;
2632: my $lonhost=$perlvar{'lonHostID'};
2633: my $infostr=&escape(
2634: 'CHECKOUTTOKEN&'.
2635: $tuname.'&'.
2636: $tudom.'&'.
2637: $tcrsid.'&'.
2638: $symb.'&'.
2639: $now.'&'.$ENV{'REMOTE_ADDR'});
2640: my $token=&reply('tmpput:'.$infostr,$lonhost);
2641: if ($token=~/^error\:/) {
2642: &logthis("<font color=\"blue\">WARNING: ".
2643: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2644: "</font>");
2645: return '';
2646: }
2647:
2648: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2649: $token=~tr/a-z/A-Z/;
2650:
2651: my %infohash=('resource.0.outtoken' => $token,
2652: 'resource.0.checkouttime' => $now,
2653: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2654:
2655: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2656: return '';
2657: } else {
2658: &logthis("<font color=\"blue\">WARNING: ".
2659: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2660: "</font>");
2661: }
2662:
2663: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2664: &escape('Checkout '.$infostr.' - '.
2665: $token)) ne 'ok') {
2666: return '';
2667: } else {
2668: &logthis("<font color=\"blue\">WARNING: ".
2669: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2670: "</font>");
2671: }
2672: return $token;
2673: }
2674:
2675: # ------------------------------------------------------------ Check in an item
2676:
2677: sub checkin {
2678: my $token=shift;
2679: my $now=time;
2680: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2681: $lonhost=~tr/A-Z/a-z/;
2682: my $dtoken=$ta.'_'.&hostname($lonhost).'_'.$tb;
2683: $dtoken=~s/\W/\_/g;
2684: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2685: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2686:
2687: unless (($tuname) && ($tudom)) {
2688: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2689: return '';
2690: }
2691:
2692: unless (&allowed('mgr',$tcrsid)) {
2693: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2694: $env{'user.name'}.' - '.$env{'user.domain'});
2695: return '';
2696: }
2697:
2698: my %infohash=('resource.0.intoken' => $token,
2699: 'resource.0.checkintime' => $now,
2700: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2701:
2702: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2703: return '';
2704: }
2705:
2706: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2707: &escape('Checkin - '.$token)) ne 'ok') {
2708: return '';
2709: }
2710:
2711: return ($symb,$tuname,$tudom,$tcrsid);
2712: }
2713:
2714: # --------------------------------------------- Set Expire Date for Spreadsheet
2715:
2716: sub expirespread {
2717: my ($uname,$udom,$stype,$usymb)=@_;
2718: my $cid=$env{'request.course.id'};
2719: if ($cid) {
2720: my $now=time;
2721: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2722: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2723: $env{'course.'.$cid.'.num'}.
2724: ':nohist_expirationdates:'.
2725: &escape($key).'='.$now,
2726: $env{'course.'.$cid.'.home'})
2727: }
2728: return 'ok';
2729: }
2730:
2731: # ----------------------------------------------------- Devalidate Spreadsheets
2732:
2733: sub devalidate {
2734: my ($symb,$uname,$udom)=@_;
2735: my $cid=$env{'request.course.id'};
2736: if ($cid) {
2737: # delete the stored spreadsheets for
2738: # - the student level sheet of this user in course's homespace
2739: # - the assessment level sheet for this resource
2740: # for this user in user's homespace
2741: # - current conditional state info
2742: my $key=$uname.':'.$udom.':';
2743: my $status=
2744: &del('nohist_calculatedsheets',
2745: [$key.'studentcalc:'],
2746: $env{'course.'.$cid.'.domain'},
2747: $env{'course.'.$cid.'.num'})
2748: .' '.
2749: &del('nohist_calculatedsheets_'.$cid,
2750: [$key.'assesscalc:'.$symb],$udom,$uname);
2751: unless ($status eq 'ok ok') {
2752: &logthis('Could not devalidate spreadsheet '.
2753: $uname.' at '.$udom.' for '.
2754: $symb.': '.$status);
2755: }
2756: &delenv('user.state.'.$cid);
2757: }
2758: }
2759:
2760: sub get_scalar {
2761: my ($string,$end) = @_;
2762: my $value;
2763: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2764: $value = $1;
2765: } elsif ($$string =~ s/^([^&]*?)&//) {
2766: $value = $1;
2767: }
2768: return &unescape($value);
2769: }
2770:
2771: sub array2str {
2772: my (@array) = @_;
2773: my $result=&arrayref2str(\@array);
2774: $result=~s/^__ARRAY_REF__//;
2775: $result=~s/__END_ARRAY_REF__$//;
2776: return $result;
2777: }
2778:
2779: sub arrayref2str {
2780: my ($arrayref) = @_;
2781: my $result='__ARRAY_REF__';
2782: foreach my $elem (@$arrayref) {
2783: if(ref($elem) eq 'ARRAY') {
2784: $result.=&arrayref2str($elem).'&';
2785: } elsif(ref($elem) eq 'HASH') {
2786: $result.=&hashref2str($elem).'&';
2787: } elsif(ref($elem)) {
2788: #print("Got a ref of ".(ref($elem))." skipping.");
2789: } else {
2790: $result.=&escape($elem).'&';
2791: }
2792: }
2793: $result=~s/\&$//;
2794: $result .= '__END_ARRAY_REF__';
2795: return $result;
2796: }
2797:
2798: sub hash2str {
2799: my (%hash) = @_;
2800: my $result=&hashref2str(\%hash);
2801: $result=~s/^__HASH_REF__//;
2802: $result=~s/__END_HASH_REF__$//;
2803: return $result;
2804: }
2805:
2806: sub hashref2str {
2807: my ($hashref)=@_;
2808: my $result='__HASH_REF__';
2809: foreach my $key (sort(keys(%$hashref))) {
2810: if (ref($key) eq 'ARRAY') {
2811: $result.=&arrayref2str($key).'=';
2812: } elsif (ref($key) eq 'HASH') {
2813: $result.=&hashref2str($key).'=';
2814: } elsif (ref($key)) {
2815: $result.='=';
2816: #print("Got a ref of ".(ref($key))." skipping.");
2817: } else {
2818: if ($key) {$result.=&escape($key).'=';} else { last; }
2819: }
2820:
2821: if(ref($hashref->{$key}) eq 'ARRAY') {
2822: $result.=&arrayref2str($hashref->{$key}).'&';
2823: } elsif(ref($hashref->{$key}) eq 'HASH') {
2824: $result.=&hashref2str($hashref->{$key}).'&';
2825: } elsif(ref($hashref->{$key})) {
2826: $result.='&';
2827: #print("Got a ref of ".(ref($hashref->{$key}))." skipping.");
2828: } else {
2829: $result.=&escape($hashref->{$key}).'&';
2830: }
2831: }
2832: $result=~s/\&$//;
2833: $result .= '__END_HASH_REF__';
2834: return $result;
2835: }
2836:
2837: sub str2hash {
2838: my ($string)=@_;
2839: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2840: return %$hash;
2841: }
2842:
2843: sub str2hashref {
2844: my ($string) = @_;
2845:
2846: my %hash;
2847:
2848: if($string !~ /^__HASH_REF__/) {
2849: if (! ($string eq '' || !defined($string))) {
2850: $hash{'error'}='Not hash reference';
2851: }
2852: return (\%hash, $string);
2853: }
2854:
2855: $string =~ s/^__HASH_REF__//;
2856:
2857: while($string !~ /^__END_HASH_REF__/) {
2858: #key
2859: my $key='';
2860: if($string =~ /^__HASH_REF__/) {
2861: ($key, $string)=&str2hashref($string);
2862: if(defined($key->{'error'})) {
2863: $hash{'error'}='Bad data';
2864: return (\%hash, $string);
2865: }
2866: } elsif($string =~ /^__ARRAY_REF__/) {
2867: ($key, $string)=&str2arrayref($string);
2868: if($key->[0] eq 'Array reference error') {
2869: $hash{'error'}='Bad data';
2870: return (\%hash, $string);
2871: }
2872: } else {
2873: $string =~ s/^(.*?)=//;
2874: $key=&unescape($1);
2875: }
2876: $string =~ s/^=//;
2877:
2878: #value
2879: my $value='';
2880: if($string =~ /^__HASH_REF__/) {
2881: ($value, $string)=&str2hashref($string);
2882: if(defined($value->{'error'})) {
2883: $hash{'error'}='Bad data';
2884: return (\%hash, $string);
2885: }
2886: } elsif($string =~ /^__ARRAY_REF__/) {
2887: ($value, $string)=&str2arrayref($string);
2888: if($value->[0] eq 'Array reference error') {
2889: $hash{'error'}='Bad data';
2890: return (\%hash, $string);
2891: }
2892: } else {
2893: $value=&get_scalar(\$string,'__END_HASH_REF__');
2894: }
2895: $string =~ s/^&//;
2896:
2897: $hash{$key}=$value;
2898: }
2899:
2900: $string =~ s/^__END_HASH_REF__//;
2901:
2902: return (\%hash, $string);
2903: }
2904:
2905: sub str2array {
2906: my ($string)=@_;
2907: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2908: return @$array;
2909: }
2910:
2911: sub str2arrayref {
2912: my ($string) = @_;
2913: my @array;
2914:
2915: if($string !~ /^__ARRAY_REF__/) {
2916: if (! ($string eq '' || !defined($string))) {
2917: $array[0]='Array reference error';
2918: }
2919: return (\@array, $string);
2920: }
2921:
2922: $string =~ s/^__ARRAY_REF__//;
2923:
2924: while($string !~ /^__END_ARRAY_REF__/) {
2925: my $value='';
2926: if($string =~ /^__HASH_REF__/) {
2927: ($value, $string)=&str2hashref($string);
2928: if(defined($value->{'error'})) {
2929: $array[0] ='Array reference error';
2930: return (\@array, $string);
2931: }
2932: } elsif($string =~ /^__ARRAY_REF__/) {
2933: ($value, $string)=&str2arrayref($string);
2934: if($value->[0] eq 'Array reference error') {
2935: $array[0] ='Array reference error';
2936: return (\@array, $string);
2937: }
2938: } else {
2939: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2940: }
2941: $string =~ s/^&//;
2942:
2943: push(@array, $value);
2944: }
2945:
2946: $string =~ s/^__END_ARRAY_REF__//;
2947:
2948: return (\@array, $string);
2949: }
2950:
2951: # -------------------------------------------------------------------Temp Store
2952:
2953: sub tmpreset {
2954: my ($symb,$namespace,$domain,$stuname) = @_;
2955: if (!$symb) {
2956: $symb=&symbread();
2957: if (!$symb) { $symb= $env{'request.url'}; }
2958: }
2959: $symb=escape($symb);
2960:
2961: if (!$namespace) { $namespace=$env{'request.state'}; }
2962: $namespace=~s/\//\_/g;
2963: $namespace=~s/\W//g;
2964:
2965: if (!$domain) { $domain=$env{'user.domain'}; }
2966: if (!$stuname) { $stuname=$env{'user.name'}; }
2967: if ($domain eq 'public' && $stuname eq 'public') {
2968: $stuname=$ENV{'REMOTE_ADDR'};
2969: }
2970: my $path=$perlvar{'lonDaemons'}.'/tmp';
2971: my %hash;
2972: if (tie(%hash,'GDBM_File',
2973: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2974: &GDBM_WRCREAT(),0640)) {
2975: foreach my $key (keys %hash) {
2976: if ($key=~ /:$symb/) {
2977: delete($hash{$key});
2978: }
2979: }
2980: }
2981: }
2982:
2983: sub tmpstore {
2984: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2985:
2986: if (!$symb) {
2987: $symb=&symbread();
2988: if (!$symb) { $symb= $env{'request.url'}; }
2989: }
2990: $symb=escape($symb);
2991:
2992: if (!$namespace) {
2993: # I don't think we would ever want to store this for a course.
2994: # it seems this will only be used if we don't have a course.
2995: #$namespace=$env{'request.course.id'};
2996: #if (!$namespace) {
2997: $namespace=$env{'request.state'};
2998: #}
2999: }
3000: $namespace=~s/\//\_/g;
3001: $namespace=~s/\W//g;
3002: if (!$domain) { $domain=$env{'user.domain'}; }
3003: if (!$stuname) { $stuname=$env{'user.name'}; }
3004: if ($domain eq 'public' && $stuname eq 'public') {
3005: $stuname=$ENV{'REMOTE_ADDR'};
3006: }
3007: my $now=time;
3008: my %hash;
3009: my $path=$perlvar{'lonDaemons'}.'/tmp';
3010: if (tie(%hash,'GDBM_File',
3011: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
3012: &GDBM_WRCREAT(),0640)) {
3013: $hash{"version:$symb"}++;
3014: my $version=$hash{"version:$symb"};
3015: my $allkeys='';
3016: foreach my $key (keys(%$storehash)) {
3017: $allkeys.=$key.':';
3018: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
3019: }
3020: $hash{"$version:$symb:timestamp"}=$now;
3021: $allkeys.='timestamp';
3022: $hash{"$version:keys:$symb"}=$allkeys;
3023: if (untie(%hash)) {
3024: return 'ok';
3025: } else {
3026: return "error:$!";
3027: }
3028: } else {
3029: return "error:$!";
3030: }
3031: }
3032:
3033: # -----------------------------------------------------------------Temp Restore
3034:
3035: sub tmprestore {
3036: my ($symb,$namespace,$domain,$stuname) = @_;
3037:
3038: if (!$symb) {
3039: $symb=&symbread();
3040: if (!$symb) { $symb= $env{'request.url'}; }
3041: }
3042: $symb=escape($symb);
3043:
3044: if (!$namespace) { $namespace=$env{'request.state'}; }
3045:
3046: if (!$domain) { $domain=$env{'user.domain'}; }
3047: if (!$stuname) { $stuname=$env{'user.name'}; }
3048: if ($domain eq 'public' && $stuname eq 'public') {
3049: $stuname=$ENV{'REMOTE_ADDR'};
3050: }
3051: my %returnhash;
3052: $namespace=~s/\//\_/g;
3053: $namespace=~s/\W//g;
3054: my %hash;
3055: my $path=$perlvar{'lonDaemons'}.'/tmp';
3056: if (tie(%hash,'GDBM_File',
3057: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
3058: &GDBM_READER(),0640)) {
3059: my $version=$hash{"version:$symb"};
3060: $returnhash{'version'}=$version;
3061: my $scope;
3062: for ($scope=1;$scope<=$version;$scope++) {
3063: my $vkeys=$hash{"$scope:keys:$symb"};
3064: my @keys=split(/:/,$vkeys);
3065: my $key;
3066: $returnhash{"$scope:keys"}=$vkeys;
3067: foreach $key (@keys) {
3068: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
3069: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
3070: }
3071: }
3072: if (!(untie(%hash))) {
3073: return "error:$!";
3074: }
3075: } else {
3076: return "error:$!";
3077: }
3078: return %returnhash;
3079: }
3080:
3081: # ----------------------------------------------------------------------- Store
3082:
3083: sub store {
3084: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
3085: my $home='';
3086:
3087: if ($stuname) { $home=&homeserver($stuname,$domain); }
3088:
3089: $symb=&symbclean($symb);
3090: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
3091:
3092: if (!$domain) { $domain=$env{'user.domain'}; }
3093: if (!$stuname) { $stuname=$env{'user.name'}; }
3094:
3095: &devalidate($symb,$stuname,$domain);
3096:
3097: $symb=escape($symb);
3098: if (!$namespace) {
3099: unless ($namespace=$env{'request.course.id'}) {
3100: return '';
3101: }
3102: }
3103: if (!$home) { $home=$env{'user.home'}; }
3104:
3105: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
3106: $$storehash{'host'}=$perlvar{'lonHostID'};
3107:
3108: my $namevalue='';
3109: foreach my $key (keys(%$storehash)) {
3110: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3111: }
3112: $namevalue=~s/\&$//;
3113: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
3114: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
3115: }
3116:
3117: # -------------------------------------------------------------- Critical Store
3118:
3119: sub cstore {
3120: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
3121: my $home='';
3122:
3123: if ($stuname) { $home=&homeserver($stuname,$domain); }
3124:
3125: $symb=&symbclean($symb);
3126: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
3127:
3128: if (!$domain) { $domain=$env{'user.domain'}; }
3129: if (!$stuname) { $stuname=$env{'user.name'}; }
3130:
3131: &devalidate($symb,$stuname,$domain);
3132:
3133: $symb=escape($symb);
3134: if (!$namespace) {
3135: unless ($namespace=$env{'request.course.id'}) {
3136: return '';
3137: }
3138: }
3139: if (!$home) { $home=$env{'user.home'}; }
3140:
3141: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
3142: $$storehash{'host'}=$perlvar{'lonHostID'};
3143:
3144: my $namevalue='';
3145: foreach my $key (keys(%$storehash)) {
3146: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3147: }
3148: $namevalue=~s/\&$//;
3149: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
3150: return critical
3151: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
3152: }
3153:
3154: # --------------------------------------------------------------------- Restore
3155:
3156: sub restore {
3157: my ($symb,$namespace,$domain,$stuname) = @_;
3158: my $home='';
3159:
3160: if ($stuname) { $home=&homeserver($stuname,$domain); }
3161:
3162: if (!$symb) {
3163: unless ($symb=escape(&symbread())) { return ''; }
3164: } else {
3165: $symb=&escape(&symbclean($symb));
3166: }
3167: if (!$namespace) {
3168: unless ($namespace=$env{'request.course.id'}) {
3169: return '';
3170: }
3171: }
3172: if (!$domain) { $domain=$env{'user.domain'}; }
3173: if (!$stuname) { $stuname=$env{'user.name'}; }
3174: if (!$home) { $home=$env{'user.home'}; }
3175: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
3176:
3177: my %returnhash=();
3178: foreach my $line (split(/\&/,$answer)) {
3179: my ($name,$value)=split(/\=/,$line);
3180: $returnhash{&unescape($name)}=&thaw_unescape($value);
3181: }
3182: my $version;
3183: for ($version=1;$version<=$returnhash{'version'};$version++) {
3184: foreach my $item (split(/\:/,$returnhash{$version.':keys'})) {
3185: $returnhash{$item}=$returnhash{$version.':'.$item};
3186: }
3187: }
3188: return %returnhash;
3189: }
3190:
3191: # ---------------------------------------------------------- Course Description
3192:
3193: sub coursedescription {
3194: my ($courseid,$args)=@_;
3195: $courseid=~s/^\///;
3196: $courseid=~s/\_/\//g;
3197: my ($cdomain,$cnum)=split(/\//,$courseid);
3198: my $chome=&homeserver($cnum,$cdomain);
3199: my $normalid=$cdomain.'_'.$cnum;
3200: # need to always cache even if we get errors otherwise we keep
3201: # trying and trying and trying to get the course description.
3202: my %envhash=();
3203: my %returnhash=();
3204:
3205: my $expiretime=600;
3206: if ($env{'request.course.id'} eq $normalid) {
3207: $expiretime=120;
3208: }
3209:
3210: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
3211: if (!$args->{'freshen_cache'}
3212: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
3213: foreach my $key (keys(%env)) {
3214: next if ($key !~ /^\Q$prefix\E(.*)/);
3215: my ($setting) = $1;
3216: $returnhash{$setting} = $env{$key};
3217: }
3218: return %returnhash;
3219: }
3220:
3221: # get the data agin
3222: if (!$args->{'one_time'}) {
3223: $envhash{'course.'.$normalid.'.last_cache'}=time;
3224: }
3225:
3226: if ($chome ne 'no_host') {
3227: %returnhash=&dump('environment',$cdomain,$cnum);
3228: if (!exists($returnhash{'con_lost'})) {
3229: $returnhash{'home'}= $chome;
3230: $returnhash{'domain'} = $cdomain;
3231: $returnhash{'num'} = $cnum;
3232: if (!defined($returnhash{'type'})) {
3233: $returnhash{'type'} = 'Course';
3234: }
3235: while (my ($name,$value) = each %returnhash) {
3236: $envhash{'course.'.$normalid.'.'.$name}=$value;
3237: }
3238: $returnhash{'url'}=&clutter($returnhash{'url'});
3239: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
3240: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
3241: $envhash{'course.'.$normalid.'.home'}=$chome;
3242: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
3243: $envhash{'course.'.$normalid.'.num'}=$cnum;
3244: }
3245: }
3246: if (!$args->{'one_time'}) {
3247: &appenv(%envhash);
3248: }
3249: return %returnhash;
3250: }
3251:
3252: # -------------------------------------------------See if a user is privileged
3253:
3254: sub privileged {
3255: my ($username,$domain)=@_;
3256: my $rolesdump=&reply("dump:$domain:$username:roles",
3257: &homeserver($username,$domain));
3258: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
3259: my $now=time;
3260: if ($rolesdump ne '') {
3261: foreach my $entry (split(/&/,$rolesdump)) {
3262: if ($entry!~/^rolesdef_/) {
3263: my ($area,$role)=split(/=/,$entry);
3264: $area=~s/\_\w\w$//;
3265: my ($trole,$tend,$tstart)=split(/_/,$role);
3266: if (($trole eq 'dc') || ($trole eq 'su')) {
3267: my $active=1;
3268: if ($tend) {
3269: if ($tend<$now) { $active=0; }
3270: }
3271: if ($tstart) {
3272: if ($tstart>$now) { $active=0; }
3273: }
3274: if ($active) { return 1; }
3275: }
3276: }
3277: }
3278: }
3279: return 0;
3280: }
3281:
3282: # -------------------------------------------------------- Get user privileges
3283:
3284: sub rolesinit {
3285: my ($domain,$username,$authhost)=@_;
3286: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
3287: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
3288: my %allroles=();
3289: my %allgroups=();
3290: my $now=time;
3291: my %userroles = ('user.login.time' => $now);
3292: my $group_privs;
3293:
3294: if ($rolesdump ne '') {
3295: foreach my $entry (split(/&/,$rolesdump)) {
3296: if ($entry!~/^rolesdef_/) {
3297: my ($area,$role)=split(/=/,$entry);
3298: $area=~s/\_\w\w$//;
3299: my ($trole,$tend,$tstart,$group_privs);
3300: if ($role=~/^cr/) {
3301: if ($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|) {
3302: ($trole,my $trest)=($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|);
3303: ($tend,$tstart)=split('_',$trest);
3304: } else {
3305: $trole=$role;
3306: }
3307: } elsif ($role =~ m|^gr/|) {
3308: ($trole,$tend,$tstart) = split(/_/,$role);
3309: ($trole,$group_privs) = split(/\//,$trole);
3310: $group_privs = &unescape($group_privs);
3311: } else {
3312: ($trole,$tend,$tstart)=split(/_/,$role);
3313: }
3314: my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
3315: $username);
3316: @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
3317: if (($tend!=0) && ($tend<$now)) { $trole=''; }
3318: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
3319: if (($area ne '') && ($trole ne '')) {
3320: my $spec=$trole.'.'.$area;
3321: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
3322: if ($trole =~ /^cr\//) {
3323: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
3324: } elsif ($trole eq 'gr') {
3325: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
3326: } else {
3327: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
3328: }
3329: }
3330: }
3331: }
3332: my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
3333: $userroles{'user.adv'} = $adv;
3334: $userroles{'user.author'} = $author;
3335: $env{'user.adv'}=$adv;
3336: }
3337: return \%userroles;
3338: }
3339:
3340: sub set_arearole {
3341: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
3342: # log the associated role with the area
3343: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
3344: return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
3345: }
3346:
3347: sub custom_roleprivs {
3348: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
3349: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
3350: my $homsvr=homeserver($rauthor,$rdomain);
3351: if (&hostname($homsvr) ne '') {
3352: my ($rdummy,$roledef)=
3353: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
3354: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
3355: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
3356: if (defined($syspriv)) {
3357: $$allroles{'cm./'}.=':'.$syspriv;
3358: $$allroles{$spec.'./'}.=':'.$syspriv;
3359: }
3360: if ($tdomain ne '') {
3361: if (defined($dompriv)) {
3362: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
3363: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
3364: }
3365: if (($trest ne '') && (defined($coursepriv))) {
3366: $$allroles{'cm.'.$area}.=':'.$coursepriv;
3367: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
3368: }
3369: }
3370: }
3371: }
3372: }
3373:
3374: sub group_roleprivs {
3375: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
3376: my $access = 1;
3377: my $now = time;
3378: if (($tend!=0) && ($tend<$now)) { $access = 0; }
3379: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
3380: if ($access) {
3381: my ($course,$group) = ($area =~ m|(/$match_domain/$match_courseid)/([^/]+)$|);
3382: $$allgroups{$course}{$group} .=':'.$group_privs;
3383: }
3384: }
3385:
3386: sub standard_roleprivs {
3387: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
3388: if (defined($pr{$trole.':s'})) {
3389: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
3390: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
3391: }
3392: if ($tdomain ne '') {
3393: if (defined($pr{$trole.':d'})) {
3394: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3395: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3396: }
3397: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
3398: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
3399: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
3400: }
3401: }
3402: }
3403:
3404: sub set_userprivs {
3405: my ($userroles,$allroles,$allgroups) = @_;
3406: my $author=0;
3407: my $adv=0;
3408: my %grouproles = ();
3409: if (keys(%{$allgroups}) > 0) {
3410: foreach my $role (keys %{$allroles}) {
3411: my ($trole,$area,$sec,$extendedarea);
3412: if ($role =~ m-^(\w+|cr/$match_domain/$match_username/\w+)\.(/$match_domain/$match_courseid)(/?\w*)\.-) {
3413: $trole = $1;
3414: $area = $2;
3415: $sec = $3;
3416: $extendedarea = $area.$sec;
3417: if (exists($$allgroups{$area})) {
3418: foreach my $group (keys(%{$$allgroups{$area}})) {
3419: my $spec = $trole.'.'.$extendedarea;
3420: $grouproles{$spec.'.'.$area.'/'.$group} =
3421: $$allgroups{$area}{$group};
3422: }
3423: }
3424: }
3425: }
3426: }
3427: foreach my $group (keys(%grouproles)) {
3428: $$allroles{$group} = $grouproles{$group};
3429: }
3430: foreach my $role (keys(%{$allroles})) {
3431: my %thesepriv;
3432: if (($role=~/^au/) || ($role=~/^ca/)) { $author=1; }
3433: foreach my $item (split(/:/,$$allroles{$role})) {
3434: if ($item ne '') {
3435: my ($privilege,$restrictions)=split(/&/,$item);
3436: if ($restrictions eq '') {
3437: $thesepriv{$privilege}='F';
3438: } elsif ($thesepriv{$privilege} ne 'F') {
3439: $thesepriv{$privilege}.=$restrictions;
3440: }
3441: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
3442: }
3443: }
3444: my $thesestr='';
3445: foreach my $priv (keys(%thesepriv)) {
3446: $thesestr.=':'.$priv.'&'.$thesepriv{$priv};
3447: }
3448: $userroles->{'user.priv.'.$role} = $thesestr;
3449: }
3450: return ($author,$adv);
3451: }
3452:
3453: # --------------------------------------------------------------- get interface
3454:
3455: sub get {
3456: my ($namespace,$storearr,$udomain,$uname)=@_;
3457: my $items='';
3458: foreach my $item (@$storearr) {
3459: $items.=&escape($item).'&';
3460: }
3461: $items=~s/\&$//;
3462: if (!$udomain) { $udomain=$env{'user.domain'}; }
3463: if (!$uname) { $uname=$env{'user.name'}; }
3464: my $uhome=&homeserver($uname,$udomain);
3465:
3466: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
3467: my @pairs=split(/\&/,$rep);
3468: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
3469: return @pairs;
3470: }
3471: my %returnhash=();
3472: my $i=0;
3473: foreach my $item (@$storearr) {
3474: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3475: $i++;
3476: }
3477: return %returnhash;
3478: }
3479:
3480: # --------------------------------------------------------------- del interface
3481:
3482: sub del {
3483: my ($namespace,$storearr,$udomain,$uname)=@_;
3484: my $items='';
3485: foreach my $item (@$storearr) {
3486: $items.=&escape($item).'&';
3487: }
3488: $items=~s/\&$//;
3489: if (!$udomain) { $udomain=$env{'user.domain'}; }
3490: if (!$uname) { $uname=$env{'user.name'}; }
3491: my $uhome=&homeserver($uname,$udomain);
3492:
3493: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
3494: }
3495:
3496: # -------------------------------------------------------------- dump interface
3497:
3498: sub dump {
3499: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3500: if (!$udomain) { $udomain=$env{'user.domain'}; }
3501: if (!$uname) { $uname=$env{'user.name'}; }
3502: my $uhome=&homeserver($uname,$udomain);
3503: if ($regexp) {
3504: $regexp=&escape($regexp);
3505: } else {
3506: $regexp='.';
3507: }
3508: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3509: my @pairs=split(/\&/,$rep);
3510: my %returnhash=();
3511: foreach my $item (@pairs) {
3512: my ($key,$value)=split(/=/,$item,2);
3513: $key = &unescape($key);
3514: next if ($key =~ /^error: 2 /);
3515: $returnhash{$key}=&thaw_unescape($value);
3516: }
3517: return %returnhash;
3518: }
3519:
3520: # --------------------------------------------------------- dumpstore interface
3521:
3522: sub dumpstore {
3523: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3524: if (!$udomain) { $udomain=$env{'user.domain'}; }
3525: if (!$uname) { $uname=$env{'user.name'}; }
3526: my $uhome=&homeserver($uname,$udomain);
3527: if ($regexp) {
3528: $regexp=&escape($regexp);
3529: } else {
3530: $regexp='.';
3531: }
3532: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3533: my @pairs=split(/\&/,$rep);
3534: my %returnhash=();
3535: foreach my $item (@pairs) {
3536: my ($key,$value)=split(/=/,$item,2);
3537: next if ($key =~ /^error: 2 /);
3538: $returnhash{$key}=&thaw_unescape($value);
3539: }
3540: return %returnhash;
3541: }
3542:
3543: # -------------------------------------------------------------- keys interface
3544:
3545: sub getkeys {
3546: my ($namespace,$udomain,$uname)=@_;
3547: if (!$udomain) { $udomain=$env{'user.domain'}; }
3548: if (!$uname) { $uname=$env{'user.name'}; }
3549: my $uhome=&homeserver($uname,$udomain);
3550: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
3551: my @keyarray=();
3552: foreach my $key (split(/\&/,$rep)) {
3553: next if ($key =~ /^error: 2 /);
3554: push(@keyarray,&unescape($key));
3555: }
3556: return @keyarray;
3557: }
3558:
3559: # --------------------------------------------------------------- currentdump
3560: sub currentdump {
3561: my ($courseid,$sdom,$sname)=@_;
3562: $courseid = $env{'request.course.id'} if (! defined($courseid));
3563: $sdom = $env{'user.domain'} if (! defined($sdom));
3564: $sname = $env{'user.name'} if (! defined($sname));
3565: my $uhome = &homeserver($sname,$sdom);
3566: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
3567: return if ($rep =~ /^(error:|no_such_host)/);
3568: #
3569: my %returnhash=();
3570: #
3571: if ($rep eq "unknown_cmd") {
3572: # an old lond will not know currentdump
3573: # Do a dump and make it look like a currentdump
3574: my @tmp = &dumpstore($courseid,$sdom,$sname,'.');
3575: return if ($tmp[0] =~ /^(error:|no_such_host)/);
3576: my %hash = @tmp;
3577: @tmp=();
3578: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
3579: } else {
3580: my @pairs=split(/\&/,$rep);
3581: foreach my $pair (@pairs) {
3582: my ($key,$value)=split(/=/,$pair,2);
3583: my ($symb,$param) = split(/:/,$key);
3584: $returnhash{&unescape($symb)}->{&unescape($param)} =
3585: &thaw_unescape($value);
3586: }
3587: }
3588: return %returnhash;
3589: }
3590:
3591: sub convert_dump_to_currentdump{
3592: my %hash = %{shift()};
3593: my %returnhash;
3594: # Code ripped from lond, essentially. The only difference
3595: # here is the unescaping done by lonnet::dump(). Conceivably
3596: # we might run in to problems with parameter names =~ /^v\./
3597: while (my ($key,$value) = each(%hash)) {
3598: my ($v,$symb,$param) = split(/:/,$key);
3599: $symb = &unescape($symb);
3600: $param = &unescape($param);
3601: next if ($v eq 'version' || $symb eq 'keys');
3602: next if (exists($returnhash{$symb}) &&
3603: exists($returnhash{$symb}->{$param}) &&
3604: $returnhash{$symb}->{'v.'.$param} > $v);
3605: $returnhash{$symb}->{$param}=$value;
3606: $returnhash{$symb}->{'v.'.$param}=$v;
3607: }
3608: #
3609: # Remove all of the keys in the hashes which keep track of
3610: # the version of the parameter.
3611: while (my ($symb,$param_hash) = each(%returnhash)) {
3612: # use a foreach because we are going to delete from the hash.
3613: foreach my $key (keys(%$param_hash)) {
3614: delete($param_hash->{$key}) if ($key =~ /^v\./);
3615: }
3616: }
3617: return \%returnhash;
3618: }
3619:
3620: # ------------------------------------------------------ critical inc interface
3621:
3622: sub cinc {
3623: return &inc(@_,'critical');
3624: }
3625:
3626: # --------------------------------------------------------------- inc interface
3627:
3628: sub inc {
3629: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3630: if (!$udomain) { $udomain=$env{'user.domain'}; }
3631: if (!$uname) { $uname=$env{'user.name'}; }
3632: my $uhome=&homeserver($uname,$udomain);
3633: my $items='';
3634: if (! ref($store)) {
3635: # got a single value, so use that instead
3636: $items = &escape($store).'=&';
3637: } elsif (ref($store) eq 'SCALAR') {
3638: $items = &escape($$store).'=&';
3639: } elsif (ref($store) eq 'ARRAY') {
3640: $items = join('=&',map {&escape($_);} @{$store});
3641: } elsif (ref($store) eq 'HASH') {
3642: while (my($key,$value) = each(%{$store})) {
3643: $items.= &escape($key).'='.&escape($value).'&';
3644: }
3645: }
3646: $items=~s/\&$//;
3647: if ($critical) {
3648: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3649: } else {
3650: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3651: }
3652: }
3653:
3654: # --------------------------------------------------------------- put interface
3655:
3656: sub put {
3657: my ($namespace,$storehash,$udomain,$uname)=@_;
3658: if (!$udomain) { $udomain=$env{'user.domain'}; }
3659: if (!$uname) { $uname=$env{'user.name'}; }
3660: my $uhome=&homeserver($uname,$udomain);
3661: my $items='';
3662: foreach my $item (keys(%$storehash)) {
3663: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3664: }
3665: $items=~s/\&$//;
3666: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3667: }
3668:
3669: # ------------------------------------------------------------ newput interface
3670:
3671: sub newput {
3672: my ($namespace,$storehash,$udomain,$uname)=@_;
3673: if (!$udomain) { $udomain=$env{'user.domain'}; }
3674: if (!$uname) { $uname=$env{'user.name'}; }
3675: my $uhome=&homeserver($uname,$udomain);
3676: my $items='';
3677: foreach my $key (keys(%$storehash)) {
3678: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3679: }
3680: $items=~s/\&$//;
3681: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3682: }
3683:
3684: # --------------------------------------------------------- putstore interface
3685:
3686: sub putstore {
3687: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3688: if (!$udomain) { $udomain=$env{'user.domain'}; }
3689: if (!$uname) { $uname=$env{'user.name'}; }
3690: my $uhome=&homeserver($uname,$udomain);
3691: my $items='';
3692: foreach my $key (keys(%$storehash)) {
3693: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3694: }
3695: $items=~s/\&$//;
3696: my $esc_symb=&escape($symb);
3697: my $esc_v=&escape($version);
3698: my $reply =
3699: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3700: $uhome);
3701: if ($reply eq 'unknown_cmd') {
3702: # gfall back to way things use to be done
3703: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3704: $uname);
3705: }
3706: return $reply;
3707: }
3708:
3709: sub old_putstore {
3710: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3711: if (!$udomain) { $udomain=$env{'user.domain'}; }
3712: if (!$uname) { $uname=$env{'user.name'}; }
3713: my $uhome=&homeserver($uname,$udomain);
3714: my %newstorehash;
3715: foreach my $item (keys(%$storehash)) {
3716: my $key = $version.':'.&escape($symb).':'.$item;
3717: $newstorehash{$key} = $storehash->{$item};
3718: }
3719: my $items='';
3720: my %allitems = ();
3721: foreach my $item (keys(%newstorehash)) {
3722: if ($item =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3723: my $key = $1.':keys:'.$2;
3724: $allitems{$key} .= $3.':';
3725: }
3726: $items.=$item.'='.&freeze_escape($newstorehash{$item}).'&';
3727: }
3728: foreach my $item (keys(%allitems)) {
3729: $allitems{$item} =~ s/\:$//;
3730: $items.= $item.'='.$allitems{$item}.'&';
3731: }
3732: $items=~s/\&$//;
3733: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3734: }
3735:
3736: # ------------------------------------------------------ critical put interface
3737:
3738: sub cput {
3739: my ($namespace,$storehash,$udomain,$uname)=@_;
3740: if (!$udomain) { $udomain=$env{'user.domain'}; }
3741: if (!$uname) { $uname=$env{'user.name'}; }
3742: my $uhome=&homeserver($uname,$udomain);
3743: my $items='';
3744: foreach my $item (keys(%$storehash)) {
3745: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3746: }
3747: $items=~s/\&$//;
3748: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3749: }
3750:
3751: # -------------------------------------------------------------- eget interface
3752:
3753: sub eget {
3754: my ($namespace,$storearr,$udomain,$uname)=@_;
3755: my $items='';
3756: foreach my $item (@$storearr) {
3757: $items.=&escape($item).'&';
3758: }
3759: $items=~s/\&$//;
3760: if (!$udomain) { $udomain=$env{'user.domain'}; }
3761: if (!$uname) { $uname=$env{'user.name'}; }
3762: my $uhome=&homeserver($uname,$udomain);
3763: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3764: my @pairs=split(/\&/,$rep);
3765: my %returnhash=();
3766: my $i=0;
3767: foreach my $item (@$storearr) {
3768: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3769: $i++;
3770: }
3771: return %returnhash;
3772: }
3773:
3774: # ------------------------------------------------------------ tmpput interface
3775: sub tmpput {
3776: my ($storehash,$server,$context)=@_;
3777: my $items='';
3778: foreach my $item (keys(%$storehash)) {
3779: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3780: }
3781: $items=~s/\&$//;
3782: if (defined($context)) {
3783: $items .= ':'.&escape($context);
3784: }
3785: return &reply("tmpput:$items",$server);
3786: }
3787:
3788: # ------------------------------------------------------------ tmpget interface
3789: sub tmpget {
3790: my ($token,$server)=@_;
3791: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3792: my $rep=&reply("tmpget:$token",$server);
3793: my %returnhash;
3794: foreach my $item (split(/\&/,$rep)) {
3795: my ($key,$value)=split(/=/,$item);
3796: $returnhash{&unescape($key)}=&thaw_unescape($value);
3797: }
3798: return %returnhash;
3799: }
3800:
3801: # ------------------------------------------------------------ tmpget interface
3802: sub tmpdel {
3803: my ($token,$server)=@_;
3804: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3805: return &reply("tmpdel:$token",$server);
3806: }
3807:
3808: # -------------------------------------------------- portfolio access checking
3809:
3810: sub portfolio_access {
3811: my ($requrl) = @_;
3812: my (undef,$udom,$unum,$file_name,$group) = &parse_portfolio_url($requrl);
3813: my $result = &get_portfolio_access($udom,$unum,$file_name,$group);
3814: if ($result) {
3815: my %setters;
3816: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3817: my ($startblock,$endblock) =
3818: &Apache::loncommon::blockcheck(\%setters,'port',$unum,$udom);
3819: if ($startblock && $endblock) {
3820: return 'B';
3821: }
3822: } else {
3823: my ($startblock,$endblock) =
3824: &Apache::loncommon::blockcheck(\%setters,'port');
3825: if ($startblock && $endblock) {
3826: return 'B';
3827: }
3828: }
3829: }
3830: if ($result eq 'ok') {
3831: return 'F';
3832: } elsif ($result =~ /^[^:]+:guest_/) {
3833: return 'A';
3834: }
3835: return '';
3836: }
3837:
3838: sub get_portfolio_access {
3839: my ($udom,$unum,$file_name,$group,$access_hash) = @_;
3840:
3841: if (!ref($access_hash)) {
3842: my $current_perms = &get_portfile_permissions($udom,$unum);
3843: my %access_controls = &get_access_controls($current_perms,$group,
3844: $file_name);
3845: $access_hash = $access_controls{$file_name};
3846: }
3847:
3848: my ($public,$guest,@domains,@users,@courses,@groups);
3849: my $now = time;
3850: if (ref($access_hash) eq 'HASH') {
3851: foreach my $key (keys(%{$access_hash})) {
3852: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
3853: if ($start > $now) {
3854: next;
3855: }
3856: if ($end && $end<$now) {
3857: next;
3858: }
3859: if ($scope eq 'public') {
3860: $public = $key;
3861: last;
3862: } elsif ($scope eq 'guest') {
3863: $guest = $key;
3864: } elsif ($scope eq 'domains') {
3865: push(@domains,$key);
3866: } elsif ($scope eq 'users') {
3867: push(@users,$key);
3868: } elsif ($scope eq 'course') {
3869: push(@courses,$key);
3870: } elsif ($scope eq 'group') {
3871: push(@groups,$key);
3872: }
3873: }
3874: if ($public) {
3875: return 'ok';
3876: }
3877: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3878: if ($guest) {
3879: return $guest;
3880: }
3881: } else {
3882: if (@domains > 0) {
3883: foreach my $domkey (@domains) {
3884: if (ref($access_hash->{$domkey}{'dom'}) eq 'ARRAY') {
3885: if (grep(/^\Q$env{'user.domain'}\E$/,@{$access_hash->{$domkey}{'dom'}})) {
3886: return 'ok';
3887: }
3888: }
3889: }
3890: }
3891: if (@users > 0) {
3892: foreach my $userkey (@users) {
3893: if (ref($access_hash->{$userkey}{'users'}) eq 'ARRAY') {
3894: foreach my $item (@{$access_hash->{$userkey}{'users'}}) {
3895: if (ref($item) eq 'HASH') {
3896: if (($item->{'uname'} eq $env{'user.name'}) &&
3897: ($item->{'udom'} eq $env{'user.domain'})) {
3898: return 'ok';
3899: }
3900: }
3901: }
3902: }
3903: }
3904: }
3905: my %roleshash;
3906: my @courses_and_groups = @courses;
3907: push(@courses_and_groups,@groups);
3908: if (@courses_and_groups > 0) {
3909: my (%allgroups,%allroles);
3910: my ($start,$end,$role,$sec,$group);
3911: foreach my $envkey (%env) {
3912: if ($envkey =~ m-^user\.role\.(gr|cc|in|ta|ep|st)\./($match_domain)/($match_courseid)/?([^/]*)$-) {
3913: my $cid = $2.'_'.$3;
3914: if ($1 eq 'gr') {
3915: $group = $4;
3916: $allgroups{$cid}{$group} = $env{$envkey};
3917: } else {
3918: if ($4 eq '') {
3919: $sec = 'none';
3920: } else {
3921: $sec = $4;
3922: }
3923: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3924: }
3925: } elsif ($envkey =~ m-^user\.role\./cr/($match_domain/$match_username/\w*)./($match_domain)/($match_courseid)/?([^/]*)$-) {
3926: my $cid = $2.'_'.$3;
3927: if ($4 eq '') {
3928: $sec = 'none';
3929: } else {
3930: $sec = $4;
3931: }
3932: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3933: }
3934: }
3935: if (keys(%allroles) == 0) {
3936: return;
3937: }
3938: foreach my $key (@courses_and_groups) {
3939: my %content = %{$$access_hash{$key}};
3940: my $cnum = $content{'number'};
3941: my $cdom = $content{'domain'};
3942: my $cid = $cdom.'_'.$cnum;
3943: if (!exists($allroles{$cid})) {
3944: next;
3945: }
3946: foreach my $role_id (keys(%{$content{'roles'}})) {
3947: my @sections = @{$content{'roles'}{$role_id}{'section'}};
3948: my @groups = @{$content{'roles'}{$role_id}{'group'}};
3949: my @status = @{$content{'roles'}{$role_id}{'access'}};
3950: my @roles = @{$content{'roles'}{$role_id}{'role'}};
3951: foreach my $role (keys(%{$allroles{$cid}})) {
3952: if ((grep/^all$/,@roles) || (grep/^\Q$role\E$/,@roles)) {
3953: foreach my $sec (keys(%{$allroles{$cid}{$role}})) {
3954: if (&course_group_datechecker($allroles{$cid}{$role}{$sec},$now,\@status) eq 'ok') {
3955: if (grep/^all$/,@sections) {
3956: return 'ok';
3957: } else {
3958: if (grep/^$sec$/,@sections) {
3959: return 'ok';
3960: }
3961: }
3962: }
3963: }
3964: if (keys(%{$allgroups{$cid}}) == 0) {
3965: if (grep/^none$/,@groups) {
3966: return 'ok';
3967: }
3968: } else {
3969: if (grep/^all$/,@groups) {
3970: return 'ok';
3971: }
3972: foreach my $group (keys(%{$allgroups{$cid}})) {
3973: if (grep/^$group$/,@groups) {
3974: return 'ok';
3975: }
3976: }
3977: }
3978: }
3979: }
3980: }
3981: }
3982: }
3983: if ($guest) {
3984: return $guest;
3985: }
3986: }
3987: }
3988: return;
3989: }
3990:
3991: sub course_group_datechecker {
3992: my ($dates,$now,$status) = @_;
3993: my ($start,$end) = split(/\./,$dates);
3994: if (!$start && !$end) {
3995: return 'ok';
3996: }
3997: if (grep/^active$/,@{$status}) {
3998: if (((!$start) || ($start && $start <= $now)) && ((!$end) || ($end && $end >= $now))) {
3999: return 'ok';
4000: }
4001: }
4002: if (grep/^previous$/,@{$status}) {
4003: if ($end > $now ) {
4004: return 'ok';
4005: }
4006: }
4007: if (grep/^future$/,@{$status}) {
4008: if ($start > $now) {
4009: return 'ok';
4010: }
4011: }
4012: return;
4013: }
4014:
4015: sub parse_portfolio_url {
4016: my ($url) = @_;
4017:
4018: my ($type,$udom,$unum,$group,$file_name);
4019:
4020: if ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_username)/portfolio(/.+)$-) {
4021: $type = 1;
4022: $udom = $1;
4023: $unum = $2;
4024: $file_name = $3;
4025: } elsif ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_courseid)/groups/([^/]+)/portfolio/(.+)$-) {
4026: $type = 2;
4027: $udom = $1;
4028: $unum = $2;
4029: $group = $3;
4030: $file_name = $3.'/'.$4;
4031: }
4032: if (wantarray) {
4033: return ($type,$udom,$unum,$file_name,$group);
4034: }
4035: return $type;
4036: }
4037:
4038: sub is_portfolio_url {
4039: my ($url) = @_;
4040: return scalar(&parse_portfolio_url($url));
4041: }
4042:
4043: sub is_portfolio_file {
4044: my ($file) = @_;
4045: if (($file =~ /^portfolio/) || ($file =~ /^groups\/\w+\/portfolio/)) {
4046: return 1;
4047: }
4048: return;
4049: }
4050:
4051:
4052: # ---------------------------------------------- Custom access rule evaluation
4053:
4054: sub customaccess {
4055: my ($priv,$uri)=@_;
4056: my ($urole,$urealm)=split(/\./,$env{'request.role'},2);
4057: my (undef,$udom,$ucrs,$usec)=split(/\//,$urealm);
4058: $udom = &LONCAPA::clean_domain($udom);
4059: $ucrs = &LONCAPA::clean_username($ucrs);
4060: my $access=0;
4061: foreach my $right (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
4062: my ($effect,$realm,$role,$type)=split(/\:/,$right);
4063: if ($type eq 'user') {
4064: foreach my $scope (split(/\s*\,\s*/,$realm)) {
4065: my ($tdom,$tuname)=split(m{/},$scope);
4066: if ($tdom) {
4067: if ($tdom ne $env{'user.domain'}) { next; }
4068: }
4069: if ($tuname) {
4070: if ($tuname ne $env{'user.name'}) { next; }
4071: }
4072: $access=($effect eq 'allow');
4073: last;
4074: }
4075: } else {
4076: if ($role) {
4077: if ($role ne $urole) { next; }
4078: }
4079: foreach my $scope (split(/\s*\,\s*/,$realm)) {
4080: my ($tdom,$tcrs,$tsec)=split(/\_/,$scope);
4081: if ($tdom) {
4082: if ($tdom ne $udom) { next; }
4083: }
4084: if ($tcrs) {
4085: if ($tcrs ne $ucrs) { next; }
4086: }
4087: if ($tsec) {
4088: if ($tsec ne $usec) { next; }
4089: }
4090: $access=($effect eq 'allow');
4091: last;
4092: }
4093: if ($realm eq '' && $role eq '') {
4094: $access=($effect eq 'allow');
4095: }
4096: }
4097: }
4098: return $access;
4099: }
4100:
4101: # ------------------------------------------------- Check for a user privilege
4102:
4103: sub allowed {
4104: my ($priv,$uri,$symb,$role)=@_;
4105: my $ver_orguri=$uri;
4106: $uri=&deversion($uri);
4107: my $orguri=$uri;
4108: $uri=&declutter($uri);
4109:
4110: if ($priv eq 'evb') {
4111: # Evade communication block restrictions for specified role in a course
4112: if ($env{'user.priv.'.$role} =~/evb\&([^\:]*)/) {
4113: return $1;
4114: } else {
4115: return;
4116: }
4117: }
4118:
4119: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
4120: # Free bre access to adm and meta resources
4121: if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard)$}))
4122: || (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) ))
4123: && ($priv eq 'bre')) {
4124: return 'F';
4125: }
4126:
4127: # Free bre access to user's own portfolio contents
4128: my ($space,$domain,$name,@dir)=split('/',$uri);
4129: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
4130: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
4131: my %setters;
4132: my ($startblock,$endblock) =
4133: &Apache::loncommon::blockcheck(\%setters,'port');
4134: if ($startblock && $endblock) {
4135: return 'B';
4136: } else {
4137: return 'F';
4138: }
4139: }
4140:
4141: # bre access to group portfolio for rgf priv in group, or mdg or vcg in course.
4142: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
4143: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
4144: if (exists($env{'request.course.id'})) {
4145: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
4146: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
4147: if (($domain eq $cdom) && ($name eq $cnum)) {
4148: my $courseprivid=$env{'request.course.id'};
4149: $courseprivid=~s/\_/\//;
4150: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
4151: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
4152: return $1;
4153: } else {
4154: if ($env{'request.course.sec'}) {
4155: $courseprivid.='/'.$env{'request.course.sec'};
4156: }
4157: if ($env{'user.priv.'.$env{'request.role'}.'./'.
4158: $courseprivid} =~/(mdg|vcg)\&([^\:]*)/) {
4159: return $2;
4160: }
4161: }
4162: }
4163: }
4164: }
4165:
4166: # Free bre to public access
4167:
4168: if ($priv eq 'bre') {
4169: my $copyright=&metadata($uri,'copyright');
4170: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
4171: return 'F';
4172: }
4173: if ($copyright eq 'priv') {
4174: $uri=~/([^\/]+)\/([^\/]+)\//;
4175: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
4176: return '';
4177: }
4178: }
4179: if ($copyright eq 'domain') {
4180: $uri=~/([^\/]+)\/([^\/]+)\//;
4181: unless (($env{'user.domain'} eq $1) ||
4182: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
4183: return '';
4184: }
4185: }
4186: if ($env{'request.role'}=~ /li\.\//) {
4187: # Library role, so allow browsing of resources in this domain.
4188: return 'F';
4189: }
4190: if ($copyright eq 'custom') {
4191: unless (&customaccess($priv,$uri)) { return ''; }
4192: }
4193: }
4194: # Domain coordinator is trying to create a course
4195: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
4196: # uri is the requested domain in this case.
4197: # comparison to 'request.role.domain' shows if the user has selected
4198: # a role of dc for the domain in question.
4199: return 'F' if ($uri eq $env{'request.role.domain'});
4200: }
4201:
4202: my $thisallowed='';
4203: my $statecond=0;
4204: my $courseprivid='';
4205:
4206: # Course
4207:
4208: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
4209: $thisallowed.=$1;
4210: }
4211:
4212: # Domain
4213:
4214: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
4215: =~/\Q$priv\E\&([^\:]*)/) {
4216: $thisallowed.=$1;
4217: }
4218:
4219: # Course: uri itself is a course
4220: my $courseuri=$uri;
4221: $courseuri=~s/\_(\d)/\/$1/;
4222: $courseuri=~s/^([^\/])/\/$1/;
4223:
4224: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
4225: =~/\Q$priv\E\&([^\:]*)/) {
4226: $thisallowed.=$1;
4227: }
4228:
4229: # URI is an uploaded document for this course, default permissions don't matter
4230: # not allowing 'edit' access (editupload) to uploaded course docs
4231: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
4232: $thisallowed='';
4233: my ($match)=&is_on_map($uri);
4234: if ($match) {
4235: if ($env{'user.priv.'.$env{'request.role'}.'./'}
4236: =~/\Q$priv\E\&([^\:]*)/) {
4237: $thisallowed.=$1;
4238: }
4239: } else {
4240: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
4241: if ($refuri) {
4242: if ($refuri =~ m|^/adm/|) {
4243: $thisallowed='F';
4244: } else {
4245: $refuri=&declutter($refuri);
4246: my ($match) = &is_on_map($refuri);
4247: if ($match) {
4248: $thisallowed='F';
4249: }
4250: }
4251: }
4252: }
4253: }
4254:
4255: if ($priv eq 'bre'
4256: && $thisallowed ne 'F'
4257: && $thisallowed ne '2'
4258: && &is_portfolio_url($uri)) {
4259: $thisallowed = &portfolio_access($uri);
4260: }
4261:
4262: # Full access at system, domain or course-wide level? Exit.
4263:
4264: if ($thisallowed=~/F/) {
4265: return 'F';
4266: }
4267:
4268: # If this is generating or modifying users, exit with special codes
4269:
4270: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
4271: if (($priv eq 'cca') || ($priv eq 'caa')) {
4272: my ($audom,$auname)=split('/',$uri);
4273: # no author name given, so this just checks on the general right to make a co-author in this domain
4274: unless ($auname) { return $thisallowed; }
4275: # an author name is given, so we are about to actually make a co-author for a certain account
4276: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
4277: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
4278: ($audom ne $env{'request.role.domain'}))) { return ''; }
4279: }
4280: return $thisallowed;
4281: }
4282: #
4283: # Gathered so far: system, domain and course wide privileges
4284: #
4285: # Course: See if uri or referer is an individual resource that is part of
4286: # the course
4287:
4288: if ($env{'request.course.id'}) {
4289:
4290: $courseprivid=$env{'request.course.id'};
4291: if ($env{'request.course.sec'}) {
4292: $courseprivid.='/'.$env{'request.course.sec'};
4293: }
4294: $courseprivid=~s/\_/\//;
4295: my $checkreferer=1;
4296: my ($match,$cond)=&is_on_map($uri);
4297: if ($match) {
4298: $statecond=$cond;
4299: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
4300: =~/\Q$priv\E\&([^\:]*)/) {
4301: $thisallowed.=$1;
4302: $checkreferer=0;
4303: }
4304: }
4305:
4306: if ($checkreferer) {
4307: my $refuri=$env{'httpref.'.$orguri};
4308: unless ($refuri) {
4309: foreach my $key (keys(%env)) {
4310: if ($key=~/^httpref\..*\*/) {
4311: my $pattern=$key;
4312: $pattern=~s/^httpref\.\/res\///;
4313: $pattern=~s/\*/\[\^\/\]\+/g;
4314: $pattern=~s/\//\\\//g;
4315: if ($orguri=~/$pattern/) {
4316: $refuri=$env{$key};
4317: }
4318: }
4319: }
4320: }
4321:
4322: if ($refuri) {
4323: $refuri=&declutter($refuri);
4324: my ($match,$cond)=&is_on_map($refuri);
4325: if ($match) {
4326: my $refstatecond=$cond;
4327: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
4328: =~/\Q$priv\E\&([^\:]*)/) {
4329: $thisallowed.=$1;
4330: $uri=$refuri;
4331: $statecond=$refstatecond;
4332: }
4333: }
4334: }
4335: }
4336: }
4337:
4338: #
4339: # Gathered now: all privileges that could apply, and condition number
4340: #
4341: #
4342: # Full or no access?
4343: #
4344:
4345: if ($thisallowed=~/F/) {
4346: return 'F';
4347: }
4348:
4349: unless ($thisallowed) {
4350: return '';
4351: }
4352:
4353: # Restrictions exist, deal with them
4354: #
4355: # C:according to course preferences
4356: # R:according to resource settings
4357: # L:unless locked
4358: # X:according to user session state
4359: #
4360:
4361: # Possibly locked functionality, check all courses
4362: # Locks might take effect only after 10 minutes cache expiration for other
4363: # courses, and 2 minutes for current course
4364:
4365: my $envkey;
4366: if ($thisallowed=~/L/) {
4367: foreach $envkey (keys %env) {
4368: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
4369: my $courseid=$2;
4370: my $roleid=$1.'.'.$2;
4371: $courseid=~s/^\///;
4372: my $expiretime=600;
4373: if ($env{'request.role'} eq $roleid) {
4374: $expiretime=120;
4375: }
4376: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
4377: my $prefix='course.'.$cdom.'_'.$cnum.'.';
4378: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
4379: &coursedescription($courseid,{'freshen_cache' => 1});
4380: }
4381: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
4382: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
4383: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
4384: &log($env{'user.domain'},$env{'user.name'},
4385: $env{'user.home'},
4386: 'Locked by res: '.$priv.' for '.$uri.' due to '.
4387: $cdom.'/'.$cnum.'/'.$csec.' expire '.
4388: $env{$prefix.'priv.'.$priv.'.lock.expire'});
4389: return '';
4390: }
4391: }
4392: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
4393: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
4394: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
4395: &log($env{'user.domain'},$env{'user.name'},
4396: $env{'user.home'},
4397: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
4398: $cdom.'/'.$cnum.'/'.$csec.' expire '.
4399: $env{$prefix.'priv.'.$priv.'.lock.expire'});
4400: return '';
4401: }
4402: }
4403: }
4404: }
4405: }
4406:
4407: #
4408: # Rest of the restrictions depend on selected course
4409: #
4410:
4411: unless ($env{'request.course.id'}) {
4412: if ($thisallowed eq 'A') {
4413: return 'A';
4414: } elsif ($thisallowed eq 'B') {
4415: return 'B';
4416: } else {
4417: return '1';
4418: }
4419: }
4420:
4421: #
4422: # Now user is definitely in a course
4423: #
4424:
4425:
4426: # Course preferences
4427:
4428: if ($thisallowed=~/C/) {
4429: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4430: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
4431: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
4432: =~/\Q$rolecode\E/) {
4433: if ($priv ne 'pch') {
4434: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4435: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
4436: $env{'request.course.id'});
4437: }
4438: return '';
4439: }
4440:
4441: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
4442: =~/\Q$unamedom\E/) {
4443: if ($priv ne 'pch') {
4444: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
4445: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
4446: $env{'request.course.id'});
4447: }
4448: return '';
4449: }
4450: }
4451:
4452: # Resource preferences
4453:
4454: if ($thisallowed=~/R/) {
4455: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4456: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
4457: if ($priv ne 'pch') {
4458: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4459: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
4460: }
4461: return '';
4462: }
4463: }
4464:
4465: # Restricted by state or randomout?
4466:
4467: if ($thisallowed=~/X/) {
4468: if ($env{'acc.randomout'}) {
4469: if (!$symb) { $symb=&symbread($uri,1); }
4470: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
4471: return '';
4472: }
4473: }
4474: if (&condval($statecond)) {
4475: return '2';
4476: } else {
4477: return '';
4478: }
4479: }
4480:
4481: if ($thisallowed eq 'A') {
4482: return 'A';
4483: } elsif ($thisallowed eq 'B') {
4484: return 'B';
4485: }
4486: return 'F';
4487: }
4488:
4489: sub split_uri_for_cond {
4490: my $uri=&deversion(&declutter(shift));
4491: my @uriparts=split(/\//,$uri);
4492: my $filename=pop(@uriparts);
4493: my $pathname=join('/',@uriparts);
4494: return ($pathname,$filename);
4495: }
4496: # --------------------------------------------------- Is a resource on the map?
4497:
4498: sub is_on_map {
4499: my ($pathname,$filename) = &split_uri_for_cond(shift);
4500: #Trying to find the conditional for the file
4501: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4502: /\&\Q$filename\E\:([\d\|]+)\&/);
4503: if ($match) {
4504: return (1,$1);
4505: } else {
4506: return (0,0);
4507: }
4508: }
4509:
4510: # --------------------------------------------------------- Get symb from alias
4511:
4512: sub get_symb_from_alias {
4513: my $symb=shift;
4514: my ($map,$resid,$url)=&decode_symb($symb);
4515: # Already is a symb
4516: if ($url) { return $symb; }
4517: # Must be an alias
4518: my $aliassymb='';
4519: my %bighash;
4520: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4521: &GDBM_READER(),0640)) {
4522: my $rid=$bighash{'mapalias_'.$symb};
4523: if ($rid) {
4524: my ($mapid,$resid)=split(/\./,$rid);
4525: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
4526: $resid,$bighash{'src_'.$rid});
4527: }
4528: untie %bighash;
4529: }
4530: return $aliassymb;
4531: }
4532:
4533: # ----------------------------------------------------------------- Define Role
4534:
4535: sub definerole {
4536: if (allowed('mcr','/')) {
4537: my ($rolename,$sysrole,$domrole,$courole)=@_;
4538: foreach my $role (split(':',$sysrole)) {
4539: my ($crole,$cqual)=split(/\&/,$role);
4540: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
4541: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
4542: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4543: return "refused:s:$crole&$cqual";
4544: }
4545: }
4546: }
4547: foreach my $role (split(':',$domrole)) {
4548: my ($crole,$cqual)=split(/\&/,$role);
4549: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
4550: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
4551: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
4552: return "refused:d:$crole&$cqual";
4553: }
4554: }
4555: }
4556: foreach my $role (split(':',$courole)) {
4557: my ($crole,$cqual)=split(/\&/,$role);
4558: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
4559: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
4560: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4561: return "refused:c:$crole&$cqual";
4562: }
4563: }
4564: }
4565: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4566: "$env{'user.domain'}:$env{'user.name'}:".
4567: "rolesdef_$rolename=".
4568: escape($sysrole.'_'.$domrole.'_'.$courole);
4569: return reply($command,$env{'user.home'});
4570: } else {
4571: return 'refused';
4572: }
4573: }
4574:
4575: # ---------------- Make a metadata query against the network of library servers
4576:
4577: sub metadata_query {
4578: my ($query,$custom,$customshow,$server_array)=@_;
4579: my %rhash;
4580: my %libserv = &all_library();
4581: my @server_list = (defined($server_array) ? @$server_array
4582: : keys(%libserv) );
4583: for my $server (@server_list) {
4584: unless ($custom or $customshow) {
4585: my $reply=&reply("querysend:".&escape($query),$server);
4586: $rhash{$server}=$reply;
4587: }
4588: else {
4589: my $reply=&reply("querysend:".&escape($query).':'.
4590: &escape($custom).':'.&escape($customshow),
4591: $server);
4592: $rhash{$server}=$reply;
4593: }
4594: }
4595: return \%rhash;
4596: }
4597:
4598: # ----------------------------------------- Send log queries and wait for reply
4599:
4600: sub log_query {
4601: my ($uname,$udom,$query,%filters)=@_;
4602: my $uhome=&homeserver($uname,$udom);
4603: if ($uhome eq 'no_host') { return 'error: no_host'; }
4604: my $uhost=&hostname($uhome);
4605: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys(%filters)));
4606: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
4607: $uhome);
4608: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
4609: return get_query_reply($queryid);
4610: }
4611:
4612: # -------------------------- Update MySQL table for portfolio file
4613:
4614: sub update_portfolio_table {
4615: my ($uname,$udom,$file_name,$query,$group,$action) = @_;
4616: my $homeserver = &homeserver($uname,$udom);
4617: my $queryid=
4618: &reply("querysend:".$query.':'.&escape($uname.':'.$udom.':'.$group).
4619: ':'.&escape($file_name).':'.$action,$homeserver);
4620: my $reply = &get_query_reply($queryid);
4621: return $reply;
4622: }
4623:
4624: # -------------------------- Update MySQL allusers table
4625:
4626: sub update_allusers_table {
4627: my ($uname,$udom,$names) = @_;
4628: my $homeserver = &homeserver($uname,$udom);
4629: my $queryid=
4630: &reply('querysend:allusers:'.&escape($uname).':'.&escape($udom).':'.
4631: 'lastname='.&escape($names->{'lastname'}).'%%'.
4632: 'firstname='.&escape($names->{'firstname'}).'%%'.
4633: 'middlename='.&escape($names->{'middlename'}).'%%'.
4634: 'generation='.&escape($names->{'generation'}).'%%'.
4635: 'permanentemail='.&escape($names->{'permanentemail'}).'%%'.
4636: 'id='.&escape($names->{'id'}),$homeserver);
4637: my $reply = &get_query_reply($queryid);
4638: return $reply;
4639: }
4640:
4641: # ------- Request retrieval of institutional classlists for course(s)
4642:
4643: sub fetch_enrollment_query {
4644: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
4645: my $homeserver;
4646: my $maxtries = 1;
4647: if ($context eq 'automated') {
4648: $homeserver = $perlvar{'lonHostID'};
4649: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
4650: } else {
4651: $homeserver = &homeserver($cnum,$dom);
4652: }
4653: my $host=&hostname($homeserver);
4654: my $cmd = '';
4655: foreach my $affiliate (keys %{$affiliatesref}) {
4656: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4657: }
4658: $cmd =~ s/%%$//;
4659: $cmd = &escape($cmd);
4660: my $query = 'fetchenrollment';
4661: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
4662: unless ($queryid=~/^\Q$host\E\_/) {
4663: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
4664: return 'error: '.$queryid;
4665: }
4666: my $reply = &get_query_reply($queryid);
4667: my $tries = 1;
4668: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4669: $reply = &get_query_reply($queryid);
4670: $tries ++;
4671: }
4672: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4673: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4674: } else {
4675: my @responses = split(/:/,$reply);
4676: if ($homeserver eq $perlvar{'lonHostID'}) {
4677: foreach my $line (@responses) {
4678: my ($key,$value) = split(/=/,$line,2);
4679: $$replyref{$key} = $value;
4680: }
4681: } else {
4682: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
4683: foreach my $line (@responses) {
4684: my ($key,$value) = split(/=/,$line);
4685: $$replyref{$key} = $value;
4686: if ($value > 0) {
4687: foreach my $item (@{$$affiliatesref{$key}}) {
4688: my $filename = $dom.'_'.$key.'_'.$item.'_classlist.xml';
4689: my $destname = $pathname.'/'.$filename;
4690: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
4691: if ($xml_classlist =~ /^error/) {
4692: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
4693: } else {
4694: if ( open(FILE,">$destname") ) {
4695: print FILE &unescape($xml_classlist);
4696: close(FILE);
4697: } else {
4698: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
4699: }
4700: }
4701: }
4702: }
4703: }
4704: }
4705: return 'ok';
4706: }
4707: return 'error';
4708: }
4709:
4710: sub get_query_reply {
4711: my $queryid=shift;
4712: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
4713: my $reply='';
4714: for (1..100) {
4715: sleep 2;
4716: if (-e $replyfile.'.end') {
4717: if (open(my $fh,$replyfile)) {
4718: $reply = join('',<$fh>);
4719: close($fh);
4720: } else { return 'error: reply_file_error'; }
4721: return &unescape($reply);
4722: }
4723: }
4724: return 'timeout:'.$queryid;
4725: }
4726:
4727: sub courselog_query {
4728: #
4729: # possible filters:
4730: # url: url or symb
4731: # username
4732: # domain
4733: # action: view, submit, grade
4734: # start: timestamp
4735: # end: timestamp
4736: #
4737: my (%filters)=@_;
4738: unless ($env{'request.course.id'}) { return 'no_course'; }
4739: if ($filters{'url'}) {
4740: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
4741: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
4742: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
4743: }
4744: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
4745: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
4746: return &log_query($cname,$cdom,'courselog',%filters);
4747: }
4748:
4749: sub userlog_query {
4750: #
4751: # possible filters:
4752: # action: log check role
4753: # start: timestamp
4754: # end: timestamp
4755: #
4756: my ($uname,$udom,%filters)=@_;
4757: return &log_query($uname,$udom,'userlog',%filters);
4758: }
4759:
4760: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
4761:
4762: sub auto_run {
4763: my ($cnum,$cdom) = @_;
4764: my $response = 0;
4765: my $settings;
4766: my %domconfig = &get_dom('configuration',['autoenroll'],$cdom);
4767: if (ref($domconfig{'autoenroll'}) eq 'HASH') {
4768: $settings = $domconfig{'autoenroll'};
4769: if ($settings->{'run'} eq '1') {
4770: $response = 1;
4771: }
4772: } else {
4773: my $homeserver = &homeserver($cnum,$cdom);
4774: $response = &reply('autorun:'.$cdom,$homeserver);
4775: }
4776: return $response;
4777: }
4778:
4779: sub auto_get_sections {
4780: my ($cnum,$cdom,$inst_coursecode) = @_;
4781: my $homeserver = &homeserver($cnum,$cdom);
4782: my @secs = ();
4783: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
4784: unless ($response eq 'refused') {
4785: @secs = split(/:/,$response);
4786: }
4787: return @secs;
4788: }
4789:
4790: sub auto_new_course {
4791: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
4792: my $homeserver = &homeserver($cnum,$cdom);
4793: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
4794: return $response;
4795: }
4796:
4797: sub auto_validate_courseID {
4798: my ($cnum,$cdom,$inst_course_id) = @_;
4799: my $homeserver = &homeserver($cnum,$cdom);
4800: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
4801: return $response;
4802: }
4803:
4804: sub auto_create_password {
4805: my ($cnum,$cdom,$authparam,$udom) = @_;
4806: my ($homeserver,$response);
4807: my $create_passwd = 0;
4808: my $authchk = '';
4809: if ($udom =~ /^$match_domain$/) {
4810: $homeserver = &domain($udom,'primary');
4811: }
4812: if ($homeserver eq '') {
4813: if (($cdom =~ /^$match_domain$/) && ($cnum =~ /^$match_courseid$/)) {
4814: $homeserver = &homeserver($cnum,$cdom);
4815: }
4816: }
4817: if ($homeserver eq '') {
4818: $authchk = 'nodomain';
4819: } else {
4820: $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
4821: if ($response eq 'refused') {
4822: $authchk = 'refused';
4823: } else {
4824: ($authparam,$create_passwd,$authchk) = split(/:/,$response);
4825: }
4826: }
4827: return ($authparam,$create_passwd,$authchk);
4828: }
4829:
4830: sub auto_photo_permission {
4831: my ($cnum,$cdom,$students) = @_;
4832: my $homeserver = &homeserver($cnum,$cdom);
4833: my ($outcome,$perm_reqd,$conditions) =
4834: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
4835: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4836: return (undef,undef);
4837: }
4838: return ($outcome,$perm_reqd,$conditions);
4839: }
4840:
4841: sub auto_checkphotos {
4842: my ($uname,$udom,$pid) = @_;
4843: my $homeserver = &homeserver($uname,$udom);
4844: my ($result,$resulttype);
4845: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
4846: &escape($uname).':'.&escape($pid),
4847: $homeserver));
4848: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4849: return (undef,undef);
4850: }
4851: if ($outcome) {
4852: ($result,$resulttype) = split(/:/,$outcome);
4853: }
4854: return ($result,$resulttype);
4855: }
4856:
4857: sub auto_photochoice {
4858: my ($cnum,$cdom) = @_;
4859: my $homeserver = &homeserver($cnum,$cdom);
4860: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
4861: &escape($cdom),
4862: $homeserver)));
4863: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4864: return (undef,undef);
4865: }
4866: return ($update,$comment);
4867: }
4868:
4869: sub auto_photoupdate {
4870: my ($affiliatesref,$dom,$cnum,$photo) = @_;
4871: my $homeserver = &homeserver($cnum,$dom);
4872: my $host=&hostname($homeserver);
4873: my $cmd = '';
4874: my $maxtries = 1;
4875: foreach my $affiliate (keys(%{$affiliatesref})) {
4876: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4877: }
4878: $cmd =~ s/%%$//;
4879: $cmd = &escape($cmd);
4880: my $query = 'institutionalphotos';
4881: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
4882: unless ($queryid=~/^\Q$host\E\_/) {
4883: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
4884: return 'error: '.$queryid;
4885: }
4886: my $reply = &get_query_reply($queryid);
4887: my $tries = 1;
4888: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4889: $reply = &get_query_reply($queryid);
4890: $tries ++;
4891: }
4892: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4893: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4894: } else {
4895: my @responses = split(/:/,$reply);
4896: my $outcome = shift(@responses);
4897: foreach my $item (@responses) {
4898: my ($key,$value) = split(/=/,$item);
4899: $$photo{$key} = $value;
4900: }
4901: return $outcome;
4902: }
4903: return 'error';
4904: }
4905:
4906: sub auto_instcode_format {
4907: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,
4908: $cat_order) = @_;
4909: my $courses = '';
4910: my @homeservers;
4911: if ($caller eq 'global') {
4912: my %servers = &get_servers($codedom,'library');
4913: foreach my $tryserver (keys(%servers)) {
4914: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4915: push(@homeservers,$tryserver);
4916: }
4917: }
4918: } else {
4919: push(@homeservers,&homeserver($caller,$codedom));
4920: }
4921: foreach my $code (keys(%{$instcodes})) {
4922: $courses .= &escape($code).'='.&escape($$instcodes{$code}).'&';
4923: }
4924: chop($courses);
4925: my $ok_response = 0;
4926: my $response;
4927: while (@homeservers > 0 && $ok_response == 0) {
4928: my $server = shift(@homeservers);
4929: $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$server);
4930: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4931: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) =
4932: split(/:/,$response);
4933: %{$codes} = (%{$codes},&str2hash($codes_str));
4934: push(@{$codetitles},&str2array($codetitles_str));
4935: %{$cat_titles} = (%{$cat_titles},&str2hash($cat_titles_str));
4936: %{$cat_order} = (%{$cat_order},&str2hash($cat_order_str));
4937: $ok_response = 1;
4938: }
4939: }
4940: if ($ok_response) {
4941: return 'ok';
4942: } else {
4943: return $response;
4944: }
4945: }
4946:
4947: sub auto_instcode_defaults {
4948: my ($domain,$returnhash,$code_order) = @_;
4949: my @homeservers;
4950:
4951: my %servers = &get_servers($domain,'library');
4952: foreach my $tryserver (keys(%servers)) {
4953: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4954: push(@homeservers,$tryserver);
4955: }
4956: }
4957:
4958: my $response;
4959: foreach my $server (@homeservers) {
4960: $response=&reply('autoinstcodedefaults:'.$domain,$server);
4961: next if ($response =~ /(con_lost|error|no_such_host|refused)/);
4962:
4963: foreach my $pair (split(/\&/,$response)) {
4964: my ($name,$value)=split(/\=/,$pair);
4965: if ($name eq 'code_order') {
4966: @{$code_order} = split(/\&/,&unescape($value));
4967: } else {
4968: $returnhash->{&unescape($name)}=&unescape($value);
4969: }
4970: }
4971: return 'ok';
4972: }
4973:
4974: return $response;
4975: }
4976:
4977: sub auto_validate_class_sec {
4978: my ($cdom,$cnum,$owner,$inst_class) = @_;
4979: my $homeserver = &homeserver($cnum,$cdom);
4980: my $response=&reply('autovalidateclass_sec:'.$inst_class.':'.
4981: &escape($owner).':'.$cdom,$homeserver);
4982: return $response;
4983: }
4984:
4985: # ------------------------------------------------------- Course Group routines
4986:
4987: sub get_coursegroups {
4988: my ($cdom,$cnum,$group,$namespace) = @_;
4989: return(&dump($namespace,$cdom,$cnum,$group));
4990: }
4991:
4992: sub modify_coursegroup {
4993: my ($cdom,$cnum,$groupsettings) = @_;
4994: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
4995: }
4996:
4997: sub toggle_coursegroup_status {
4998: my ($cdom,$cnum,$group,$action) = @_;
4999: my ($from_namespace,$to_namespace);
5000: if ($action eq 'delete') {
5001: $from_namespace = 'coursegroups';
5002: $to_namespace = 'deleted_groups';
5003: } else {
5004: $from_namespace = 'deleted_groups';
5005: $to_namespace = 'coursegroups';
5006: }
5007: my %curr_group = &get_coursegroups($cdom,$cnum,$group,$from_namespace);
5008: if (my $tmp = &error(%curr_group)) {
5009: &Apache::lonnet::logthis('Error retrieving group: '.$tmp.' in '.$cnum.':'.$cdom);
5010: return ('read error',$tmp);
5011: } else {
5012: my %savedsettings = %curr_group;
5013: my $result = &put($to_namespace,\%savedsettings,$cdom,$cnum);
5014: my $deloutcome;
5015: if ($result eq 'ok') {
5016: $deloutcome = &del($from_namespace,[$group],$cdom,$cnum);
5017: } else {
5018: return ('write error',$result);
5019: }
5020: if ($deloutcome eq 'ok') {
5021: return 'ok';
5022: } else {
5023: return ('delete error',$deloutcome);
5024: }
5025: }
5026: }
5027:
5028: sub modify_group_roles {
5029: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
5030: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
5031: my $role = 'gr/'.&escape($userprivs);
5032: my ($uname,$udom) = split(/:/,$user);
5033: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
5034: if ($result eq 'ok') {
5035: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
5036: }
5037: return $result;
5038: }
5039:
5040: sub modify_coursegroup_membership {
5041: my ($cdom,$cnum,$membership) = @_;
5042: my $result = &put('groupmembership',$membership,$cdom,$cnum);
5043: return $result;
5044: }
5045:
5046: sub get_active_groups {
5047: my ($udom,$uname,$cdom,$cnum) = @_;
5048: my $now = time;
5049: my %groups = ();
5050: foreach my $key (keys(%env)) {
5051: if ($key =~ m-user\.role\.gr\./($match_domain)/($match_courseid)/(\w+)$-) {
5052: my ($start,$end) = split(/\./,$env{$key});
5053: if (($end!=0) && ($end<$now)) { next; }
5054: if (($start!=0) && ($start>$now)) { next; }
5055: if ($1 eq $cdom && $2 eq $cnum) {
5056: $groups{$3} = $env{$key} ;
5057: }
5058: }
5059: }
5060: return %groups;
5061: }
5062:
5063: sub get_group_membership {
5064: my ($cdom,$cnum,$group) = @_;
5065: return(&dump('groupmembership',$cdom,$cnum,$group));
5066: }
5067:
5068: sub get_users_groups {
5069: my ($udom,$uname,$courseid) = @_;
5070: my @usersgroups;
5071: my $cachetime=1800;
5072:
5073: my $hashid="$udom:$uname:$courseid";
5074: my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
5075: if (defined($cached)) {
5076: @usersgroups = split(/:/,$grouplist);
5077: } else {
5078: $grouplist = '';
5079: my $courseurl = &courseid_to_courseurl($courseid);
5080: my %roleshash = &dump('roles',$udom,$uname,$courseurl);
5081: my $access_end = $env{'course.'.$courseid.
5082: '.default_enrollment_end_date'};
5083: my $now = time;
5084: foreach my $key (keys(%roleshash)) {
5085: if ($key =~ /^\Q$courseurl\E\/(\w+)\_gr$/) {
5086: my $group = $1;
5087: if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
5088: my $start = $2;
5089: my $end = $1;
5090: if ($start == -1) { next; } # deleted from group
5091: if (($start!=0) && ($start>$now)) { next; }
5092: if (($end!=0) && ($end<$now)) {
5093: if ($access_end && $access_end < $now) {
5094: if ($access_end - $end < 86400) {
5095: push(@usersgroups,$group);
5096: }
5097: }
5098: next;
5099: }
5100: push(@usersgroups,$group);
5101: }
5102: }
5103: }
5104: @usersgroups = &sort_course_groups($courseid,@usersgroups);
5105: $grouplist = join(':',@usersgroups);
5106: &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
5107: }
5108: return @usersgroups;
5109: }
5110:
5111: sub devalidate_getgroups_cache {
5112: my ($udom,$uname,$cdom,$cnum)=@_;
5113: my $courseid = $cdom.'_'.$cnum;
5114:
5115: my $hashid="$udom:$uname:$courseid";
5116: &devalidate_cache_new('getgroups',$hashid);
5117: }
5118:
5119: # ------------------------------------------------------------------ Plain Text
5120:
5121: sub plaintext {
5122: my ($short,$type,$cid) = @_;
5123: if ($short =~ /^cr/) {
5124: return (split('/',$short))[-1];
5125: }
5126: if (!defined($cid)) {
5127: $cid = $env{'request.course.id'};
5128: }
5129: if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
5130: return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
5131: '.plaintext'});
5132: }
5133: my %rolenames = (
5134: Course => 'std',
5135: Group => 'alt1',
5136: );
5137: if (defined($type) &&
5138: defined($rolenames{$type}) &&
5139: defined($prp{$short}{$rolenames{$type}})) {
5140: return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
5141: } else {
5142: return &Apache::lonlocal::mt($prp{$short}{'std'});
5143: }
5144: }
5145:
5146: # ----------------------------------------------------------------- Assign Role
5147:
5148: sub assignrole {
5149: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
5150: my $mrole;
5151: if ($role =~ /^cr\//) {
5152: my $cwosec=$url;
5153: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
5154: unless (&allowed('ccr',$cwosec)) {
5155: &logthis('Refused custom assignrole: '.
5156: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
5157: $env{'user.name'}.' at '.$env{'user.domain'});
5158: return 'refused';
5159: }
5160: $mrole='cr';
5161: } elsif ($role =~ /^gr\//) {
5162: my $cwogrp=$url;
5163: $cwogrp=~s{^/($match_domain)/($match_courseid)/.*}{$1/$2};
5164: unless (&allowed('mdg',$cwogrp)) {
5165: &logthis('Refused group assignrole: '.
5166: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
5167: $env{'user.name'}.' at '.$env{'user.domain'});
5168: return 'refused';
5169: }
5170: $mrole='gr';
5171: } else {
5172: my $cwosec=$url;
5173: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
5174: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
5175: &logthis('Refused assignrole: '.
5176: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
5177: $env{'user.name'}.' at '.$env{'user.domain'});
5178: return 'refused';
5179: }
5180: $mrole=$role;
5181: }
5182: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
5183: "$udom:$uname:$url".'_'."$mrole=$role";
5184: if ($end) { $command.='_'.$end; }
5185: if ($start) {
5186: if ($end) {
5187: $command.='_'.$start;
5188: } else {
5189: $command.='_0_'.$start;
5190: }
5191: }
5192: my $origstart = $start;
5193: my $origend = $end;
5194: # actually delete
5195: if ($deleteflag) {
5196: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
5197: # modify command to delete the role
5198: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
5199: "$udom:$uname:$url".'_'."$mrole";
5200: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
5201: # set start and finish to negative values for userrolelog
5202: $start=-1;
5203: $end=-1;
5204: }
5205: }
5206: # send command
5207: my $answer=&reply($command,&homeserver($uname,$udom));
5208: # log new user role if status is ok
5209: if ($answer eq 'ok') {
5210: &userrolelog($role,$uname,$udom,$url,$start,$end);
5211: # for course roles, perform group memberships changes triggered by role change.
5212: unless ($role =~ /^gr/) {
5213: &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
5214: $origstart);
5215: }
5216: }
5217: return $answer;
5218: }
5219:
5220: # -------------------------------------------------- Modify user authentication
5221: # Overrides without validation
5222:
5223: sub modifyuserauth {
5224: my ($udom,$uname,$umode,$upass)=@_;
5225: my $uhome=&homeserver($uname,$udom);
5226: unless (&allowed('mau',$udom)) { return 'refused'; }
5227: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
5228: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
5229: ' in domain '.$env{'request.role.domain'});
5230: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
5231: &escape($upass),$uhome);
5232: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
5233: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
5234: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
5235: &log($udom,,$uname,$uhome,
5236: 'Authentication changed by '.$env{'user.domain'}.', '.
5237: $env{'user.name'}.', '.$umode.
5238: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
5239: unless ($reply eq 'ok') {
5240: &logthis('Authentication mode error: '.$reply);
5241: return 'error: '.$reply;
5242: }
5243: return 'ok';
5244: }
5245:
5246: # --------------------------------------------------------------- Modify a user
5247:
5248: sub modifyuser {
5249: my ($udom, $uname, $uid,
5250: $umode, $upass, $first,
5251: $middle, $last, $gene,
5252: $forceid, $desiredhome, $email)=@_;
5253: $udom= &LONCAPA::clean_domain($udom);
5254: $uname=&LONCAPA::clean_username($uname);
5255: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
5256: $umode.', '.$first.', '.$middle.', '.
5257: $last.', '.$gene.'(forceid: '.$forceid.')'.
5258: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
5259: ' desiredhome not specified').
5260: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
5261: ' in domain '.$env{'request.role.domain'});
5262: my $uhome=&homeserver($uname,$udom,'true');
5263: # ----------------------------------------------------------------- Create User
5264: if (($uhome eq 'no_host') &&
5265: (($umode && $upass) || ($umode eq 'localauth'))) {
5266: my $unhome='';
5267: if (defined($desiredhome) && &host_domain($desiredhome) eq $udom) {
5268: $unhome = $desiredhome;
5269: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
5270: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
5271: } else { # load balancing routine for determining $unhome
5272: my $loadm=10000000;
5273: my %servers = &get_servers($udom,'library');
5274: foreach my $tryserver (keys(%servers)) {
5275: my $answer=reply('load',$tryserver);
5276: if (($answer=~/\d+/) && ($answer<$loadm)) {
5277: $loadm=$answer;
5278: $unhome=$tryserver;
5279: }
5280: }
5281: }
5282: if (($unhome eq '') || ($unhome eq 'no_host')) {
5283: return 'error: unable to find a home server for '.$uname.
5284: ' in domain '.$udom;
5285: }
5286: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
5287: &escape($upass),$unhome);
5288: unless ($reply eq 'ok') {
5289: return 'error: '.$reply;
5290: }
5291: $uhome=&homeserver($uname,$udom,'true');
5292: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
5293: return 'error: unable verify users home machine.';
5294: }
5295: } # End of creation of new user
5296: # ---------------------------------------------------------------------- Add ID
5297: if ($uid) {
5298: $uid=~tr/A-Z/a-z/;
5299: my %uidhash=&idrget($udom,$uname);
5300: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
5301: && (!$forceid)) {
5302: unless ($uid eq $uidhash{$uname}) {
5303: return 'error: user id "'.$uid.'" does not match '.
5304: 'current user id "'.$uidhash{$uname}.'".';
5305: }
5306: } else {
5307: &idput($udom,($uname => $uid));
5308: }
5309: }
5310: # -------------------------------------------------------------- Add names, etc
5311: my @tmp=&get('environment',
5312: ['firstname','middlename','lastname','generation','id',
5313: 'permanentemail'],
5314: $udom,$uname);
5315: my %names;
5316: if ($tmp[0] =~ m/^error:.*/) {
5317: %names=();
5318: } else {
5319: %names = @tmp;
5320: }
5321: #
5322: # Make sure to not trash student environment if instructor does not bother
5323: # to supply name and email information
5324: #
5325: if ($first) { $names{'firstname'} = $first; }
5326: if (defined($middle)) { $names{'middlename'} = $middle; }
5327: if ($last) { $names{'lastname'} = $last; }
5328: if (defined($gene)) { $names{'generation'} = $gene; }
5329: if ($email) {
5330: $email=~s/[^\w\@\.\-\,]//gs;
5331: if ($email=~/\@/) { $names{'notification'} = $email;
5332: $names{'critnotification'} = $email;
5333: $names{'permanentemail'} = $email; }
5334: }
5335: if ($uid) { $names{'id'} = $uid; }
5336: my $reply = &put('environment', \%names, $udom,$uname);
5337: if ($reply ne 'ok') { return 'error: '.$reply; }
5338: my $sqlresult = &update_allusers_table($uname,$udom,\%names);
5339: &devalidate_cache_new('namescache',$uname.':'.$udom);
5340: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
5341: $umode.', '.$first.', '.$middle.', '.
5342: $last.', '.$gene.' by '.
5343: $env{'user.name'}.' at '.$env{'user.domain'});
5344: return 'ok';
5345: }
5346:
5347: # -------------------------------------------------------------- Modify student
5348:
5349: sub modifystudent {
5350: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
5351: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
5352: if (!$cid) {
5353: unless ($cid=$env{'request.course.id'}) {
5354: return 'not_in_class';
5355: }
5356: }
5357: # --------------------------------------------------------------- Make the user
5358: my $reply=&modifyuser
5359: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
5360: $desiredhome,$email);
5361: unless ($reply eq 'ok') { return $reply; }
5362: # This will cause &modify_student_enrollment to get the uid from the
5363: # students environment
5364: $uid = undef if (!$forceid);
5365: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
5366: $gene,$usec,$end,$start,$type,$locktype,$cid);
5367: return $reply;
5368: }
5369:
5370: sub modify_student_enrollment {
5371: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
5372: my ($cdom,$cnum,$chome);
5373: if (!$cid) {
5374: unless ($cid=$env{'request.course.id'}) {
5375: return 'not_in_class';
5376: }
5377: $cdom=$env{'course.'.$cid.'.domain'};
5378: $cnum=$env{'course.'.$cid.'.num'};
5379: } else {
5380: ($cdom,$cnum)=split(/_/,$cid);
5381: }
5382: $chome=$env{'course.'.$cid.'.home'};
5383: if (!$chome) {
5384: $chome=&homeserver($cnum,$cdom);
5385: }
5386: if (!$chome) { return 'unknown_course'; }
5387: # Make sure the user exists
5388: my $uhome=&homeserver($uname,$udom);
5389: if (($uhome eq '') || ($uhome eq 'no_host')) {
5390: return 'error: no such user';
5391: }
5392: # Get student data if we were not given enough information
5393: if (!defined($first) || $first eq '' ||
5394: !defined($last) || $last eq '' ||
5395: !defined($uid) || $uid eq '' ||
5396: !defined($middle) || $middle eq '' ||
5397: !defined($gene) || $gene eq '') {
5398: # They did not supply us with enough data to enroll the student, so
5399: # we need to pick up more information.
5400: my %tmp = &get('environment',
5401: ['firstname','middlename','lastname', 'generation','id']
5402: ,$udom,$uname);
5403:
5404: #foreach my $key (keys(%tmp)) {
5405: # &logthis("key $key = ".$tmp{$key});
5406: #}
5407: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
5408: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
5409: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
5410: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
5411: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
5412: }
5413: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
5414: my $reply=cput('classlist',
5415: {"$uname:$udom" =>
5416: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
5417: $cdom,$cnum);
5418: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
5419: return 'error: '.$reply;
5420: } else {
5421: &devalidate_getsection_cache($udom,$uname,$cid);
5422: }
5423: # Add student role to user
5424: my $uurl='/'.$cid;
5425: $uurl=~s/\_/\//g;
5426: if ($usec) {
5427: $uurl.='/'.$usec;
5428: }
5429: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
5430: }
5431:
5432: sub format_name {
5433: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
5434: my $name;
5435: if ($first ne 'lastname') {
5436: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
5437: } else {
5438: if ($lastname=~/\S/) {
5439: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
5440: $name=~s/\s+,/,/;
5441: } else {
5442: $name.= $firstname.' '.$middlename.' '.$generation;
5443: }
5444: }
5445: $name=~s/^\s+//;
5446: $name=~s/\s+$//;
5447: $name=~s/\s+/ /g;
5448: return $name;
5449: }
5450:
5451: # ------------------------------------------------- Write to course preferences
5452:
5453: sub writecoursepref {
5454: my ($courseid,%prefs)=@_;
5455: $courseid=~s/^\///;
5456: $courseid=~s/\_/\//g;
5457: my ($cdomain,$cnum)=split(/\//,$courseid);
5458: my $chome=homeserver($cnum,$cdomain);
5459: if (($chome eq '') || ($chome eq 'no_host')) {
5460: return 'error: no such course';
5461: }
5462: my $cstring='';
5463: foreach my $pref (keys(%prefs)) {
5464: $cstring.=&escape($pref).'='.&escape($prefs{$pref}).'&';
5465: }
5466: $cstring=~s/\&$//;
5467: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
5468: }
5469:
5470: # ---------------------------------------------------------- Make/modify course
5471:
5472: sub createcourse {
5473: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
5474: $course_owner,$crstype)=@_;
5475: $url=&declutter($url);
5476: my $cid='';
5477: unless (&allowed('ccc',$udom)) {
5478: return 'refused';
5479: }
5480: # ------------------------------------------------------------------- Create ID
5481: my $uname=int(1+rand(9)).
5482: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
5483: substr($$.time,0,5).unpack("H8",pack("I32",time)).
5484: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5485: # ----------------------------------------------- Make sure that does not exist
5486: my $uhome=&homeserver($uname,$udom,'true');
5487: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5488: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
5489: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5490: $uhome=&homeserver($uname,$udom,'true');
5491: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5492: return 'error: unable to generate unique course-ID';
5493: }
5494: }
5495: # ------------------------------------------------ Check supplied server name
5496: $course_server = $env{'user.homeserver'} if (! defined($course_server));
5497: if (! &is_library($course_server)) {
5498: return 'error:bad server name '.$course_server;
5499: }
5500: # ------------------------------------------------------------- Make the course
5501: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
5502: $course_server);
5503: unless ($reply eq 'ok') { return 'error: '.$reply; }
5504: $uhome=&homeserver($uname,$udom,'true');
5505: if (($uhome eq '') || ($uhome eq 'no_host')) {
5506: return 'error: no such course';
5507: }
5508: # ----------------------------------------------------------------- Course made
5509: # log existence
5510: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
5511: ':'.&escape($inst_code).':'.&escape($course_owner).':'.
5512: &escape($crstype),$uhome);
5513: &flushcourselogs();
5514: # set toplevel url
5515: my $topurl=$url;
5516: unless ($nonstandard) {
5517: # ------------------------------------------ For standard courses, make top url
5518: my $mapurl=&clutter($url);
5519: if ($mapurl eq '/res/') { $mapurl=''; }
5520: $env{'form.initmap'}=(<<ENDINITMAP);
5521: <map>
5522: <resource id="1" type="start"></resource>
5523: <resource id="2" src="$mapurl"></resource>
5524: <resource id="3" type="finish"></resource>
5525: <link index="1" from="1" to="2"></link>
5526: <link index="2" from="2" to="3"></link>
5527: </map>
5528: ENDINITMAP
5529: $topurl=&declutter(
5530: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
5531: );
5532: }
5533: # ----------------------------------------------------------- Write preferences
5534: &writecoursepref($udom.'_'.$uname,
5535: ('description' => $description,
5536: 'url' => $topurl));
5537: return '/'.$udom.'/'.$uname;
5538: }
5539:
5540: sub is_course {
5541: my ($cdom,$cnum) = @_;
5542: my %courses = &courseiddump($cdom,'.',1,'.','.',$cnum,undef,
5543: undef,'.');
5544: if (exists($courses{$cdom.'_'.$cnum})) {
5545: return 1;
5546: }
5547: return 0;
5548: }
5549:
5550: # ---------------------------------------------------------- Assign Custom Role
5551:
5552: sub assigncustomrole {
5553: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
5554: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
5555: $end,$start,$deleteflag);
5556: }
5557:
5558: # ----------------------------------------------------------------- Revoke Role
5559:
5560: sub revokerole {
5561: my ($udom,$uname,$url,$role,$deleteflag)=@_;
5562: my $now=time;
5563: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
5564: }
5565:
5566: # ---------------------------------------------------------- Revoke Custom Role
5567:
5568: sub revokecustomrole {
5569: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
5570: my $now=time;
5571: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
5572: $deleteflag);
5573: }
5574:
5575: # ------------------------------------------------------------ Disk usage
5576: sub diskusage {
5577: my ($udom,$uname,$directoryRoot)=@_;
5578: $directoryRoot =~ s/\/$//;
5579: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
5580: return $listing;
5581: }
5582:
5583: sub is_locked {
5584: my ($file_name, $domain, $user) = @_;
5585: my @check;
5586: my $is_locked;
5587: push @check, $file_name;
5588: my %locked = &get('file_permissions',\@check,
5589: $env{'user.domain'},$env{'user.name'});
5590: my ($tmp)=keys(%locked);
5591: if ($tmp=~/^error:/) { undef(%locked); }
5592:
5593: if (ref($locked{$file_name}) eq 'ARRAY') {
5594: $is_locked = 'false';
5595: foreach my $entry (@{$locked{$file_name}}) {
5596: if (ref($entry) eq 'ARRAY') {
5597: $is_locked = 'true';
5598: last;
5599: }
5600: }
5601: } else {
5602: $is_locked = 'false';
5603: }
5604: }
5605:
5606: sub declutter_portfile {
5607: my ($file) = @_;
5608: $file =~ s{^(/portfolio/|portfolio/)}{/};
5609: return $file;
5610: }
5611:
5612: # ------------------------------------------------------------- Mark as Read Only
5613:
5614: sub mark_as_readonly {
5615: my ($domain,$user,$files,$what) = @_;
5616: my %current_permissions = &dump('file_permissions',$domain,$user);
5617: my ($tmp)=keys(%current_permissions);
5618: if ($tmp=~/^error:/) { undef(%current_permissions); }
5619: foreach my $file (@{$files}) {
5620: $file = &declutter_portfile($file);
5621: push(@{$current_permissions{$file}},$what);
5622: }
5623: &put('file_permissions',\%current_permissions,$domain,$user);
5624: return;
5625: }
5626:
5627: # ------------------------------------------------------------Save Selected Files
5628:
5629: sub save_selected_files {
5630: my ($user, $path, @files) = @_;
5631: my $filename = $user."savedfiles";
5632: my @other_files = &files_not_in_path($user, $path);
5633: open (OUT, '>'.$tmpdir.$filename);
5634: foreach my $file (@files) {
5635: print (OUT $env{'form.currentpath'}.$file."\n");
5636: }
5637: foreach my $file (@other_files) {
5638: print (OUT $file."\n");
5639: }
5640: close (OUT);
5641: return 'ok';
5642: }
5643:
5644: sub clear_selected_files {
5645: my ($user) = @_;
5646: my $filename = $user."savedfiles";
5647: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5648: print (OUT undef);
5649: close (OUT);
5650: return ("ok");
5651: }
5652:
5653: sub files_in_path {
5654: my ($user, $path) = @_;
5655: my $filename = $user."savedfiles";
5656: my %return_files;
5657: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5658: while (my $line_in = <IN>) {
5659: chomp ($line_in);
5660: my @paths_and_file = split (m!/!, $line_in);
5661: my $file_part = pop (@paths_and_file);
5662: my $path_part = join ('/', @paths_and_file);
5663: $path_part.='/';
5664: my $path_and_file = $path_part.$file_part;
5665: if ($path_part eq $path) {
5666: $return_files{$file_part}= 'selected';
5667: }
5668: }
5669: close (IN);
5670: return (\%return_files);
5671: }
5672:
5673: # called in portfolio select mode, to show files selected NOT in current directory
5674: sub files_not_in_path {
5675: my ($user, $path) = @_;
5676: my $filename = $user."savedfiles";
5677: my @return_files;
5678: my $path_part;
5679: open(IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5680: while (my $line = <IN>) {
5681: #ok, I know it's clunky, but I want it to work
5682: my @paths_and_file = split(m|/|, $line);
5683: my $file_part = pop(@paths_and_file);
5684: chomp($file_part);
5685: my $path_part = join('/', @paths_and_file);
5686: $path_part .= '/';
5687: my $path_and_file = $path_part.$file_part;
5688: if ($path_part ne $path) {
5689: push(@return_files, ($path_and_file));
5690: }
5691: }
5692: close(OUT);
5693: return (@return_files);
5694: }
5695:
5696: #----------------------------------------------Get portfolio file permissions
5697:
5698: sub get_portfile_permissions {
5699: my ($domain,$user) = @_;
5700: my %current_permissions = &dump('file_permissions',$domain,$user);
5701: my ($tmp)=keys(%current_permissions);
5702: if ($tmp=~/^error:/) { undef(%current_permissions); }
5703: return \%current_permissions;
5704: }
5705:
5706: #---------------------------------------------Get portfolio file access controls
5707:
5708: sub get_access_controls {
5709: my ($current_permissions,$group,$file) = @_;
5710: my %access;
5711: my $real_file = $file;
5712: $file =~ s/\.meta$//;
5713: if (defined($file)) {
5714: if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
5715: foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
5716: $access{$real_file}{$control} = $$current_permissions{$file."\0".$control};
5717: }
5718: }
5719: } else {
5720: foreach my $key (keys(%{$current_permissions})) {
5721: if ($key =~ /\0accesscontrol$/) {
5722: if (defined($group)) {
5723: if ($key !~ m-^\Q$group\E/-) {
5724: next;
5725: }
5726: }
5727: my ($fullpath) = split(/\0/,$key);
5728: if (ref($$current_permissions{$key}) eq 'HASH') {
5729: foreach my $control (keys(%{$$current_permissions{$key}})) {
5730: $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
5731: }
5732: }
5733: }
5734: }
5735: }
5736: return %access;
5737: }
5738:
5739: sub modify_access_controls {
5740: my ($file_name,$changes,$domain,$user)=@_;
5741: my ($outcome,$deloutcome);
5742: my %store_permissions;
5743: my %new_values;
5744: my %new_control;
5745: my %translation;
5746: my @deletions = ();
5747: my $now = time;
5748: if (exists($$changes{'activate'})) {
5749: if (ref($$changes{'activate'}) eq 'HASH') {
5750: my @newitems = sort(keys(%{$$changes{'activate'}}));
5751: my $numnew = scalar(@newitems);
5752: for (my $i=0; $i<$numnew; $i++) {
5753: my $newkey = $newitems[$i];
5754: my $newid = &Apache::loncommon::get_cgi_id();
5755: if ($newkey =~ /^\d+:/) {
5756: $newkey =~ s/^(\d+)/$newid/;
5757: $translation{$1} = $newid;
5758: } elsif ($newkey =~ /^\d+_\d+_\d+:/) {
5759: $newkey =~ s/^(\d+_\d+_\d+)/$newid/;
5760: $translation{$1} = $newid;
5761: }
5762: $new_values{$file_name."\0".$newkey} =
5763: $$changes{'activate'}{$newitems[$i]};
5764: $new_control{$newkey} = $now;
5765: }
5766: }
5767: }
5768: my %todelete;
5769: my %changed_items;
5770: foreach my $action ('delete','update') {
5771: if (exists($$changes{$action})) {
5772: if (ref($$changes{$action}) eq 'HASH') {
5773: foreach my $key (keys(%{$$changes{$action}})) {
5774: my ($itemnum) = ($key =~ /^([^:]+):/);
5775: if ($action eq 'delete') {
5776: $todelete{$itemnum} = 1;
5777: } else {
5778: $changed_items{$itemnum} = $key;
5779: }
5780: }
5781: }
5782: }
5783: }
5784: # get lock on access controls for file.
5785: my $lockhash = {
5786: $file_name."\0".'locked_access_records' => $env{'user.name'}.
5787: ':'.$env{'user.domain'},
5788: };
5789: my $tries = 0;
5790: my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5791:
5792: while (($gotlock ne 'ok') && $tries <3) {
5793: $tries ++;
5794: sleep 1;
5795: $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5796: }
5797: if ($gotlock eq 'ok') {
5798: my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
5799: my ($tmp)=keys(%curr_permissions);
5800: if ($tmp=~/^error:/) { undef(%curr_permissions); }
5801: if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
5802: my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
5803: if (ref($curr_controls) eq 'HASH') {
5804: foreach my $control_item (keys(%{$curr_controls})) {
5805: my ($itemnum) = ($control_item =~ /^([^:]+):/);
5806: if (defined($todelete{$itemnum})) {
5807: push(@deletions,$file_name."\0".$control_item);
5808: } else {
5809: if (defined($changed_items{$itemnum})) {
5810: $new_control{$changed_items{$itemnum}} = $now;
5811: push(@deletions,$file_name."\0".$control_item);
5812: $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
5813: } else {
5814: $new_control{$control_item} = $$curr_controls{$control_item};
5815: }
5816: }
5817: }
5818: }
5819: }
5820: $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
5821: $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
5822: $outcome = &put('file_permissions',\%new_values,$domain,$user);
5823: # remove lock
5824: my @del_lock = ($file_name."\0".'locked_access_records');
5825: my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
5826: my ($file,$group);
5827: if (&is_course($domain,$user)) {
5828: ($group,$file) = split(/\//,$file_name,2);
5829: } else {
5830: $file = $file_name;
5831: }
5832: my $sqlresult =
5833: &update_portfolio_table($user,$domain,$file,'portfolio_access',
5834: $group);
5835: } else {
5836: $outcome = "error: could not obtain lockfile\n";
5837: }
5838: return ($outcome,$deloutcome,\%new_values,\%translation);
5839: }
5840:
5841: sub make_public_indefinitely {
5842: my ($requrl) = @_;
5843: my $now = time;
5844: my $action = 'activate';
5845: my $aclnum = 0;
5846: if (&is_portfolio_url($requrl)) {
5847: my (undef,$udom,$unum,$file_name,$group) =
5848: &parse_portfolio_url($requrl);
5849: my $current_perms = &get_portfile_permissions($udom,$unum);
5850: my %access_controls = &get_access_controls($current_perms,
5851: $group,$file_name);
5852: foreach my $key (keys(%{$access_controls{$file_name}})) {
5853: my ($num,$scope,$end,$start) =
5854: ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
5855: if ($scope eq 'public') {
5856: if ($start <= $now && $end == 0) {
5857: $action = 'none';
5858: } else {
5859: $action = 'update';
5860: $aclnum = $num;
5861: }
5862: last;
5863: }
5864: }
5865: if ($action eq 'none') {
5866: return 'ok';
5867: } else {
5868: my %changes;
5869: my $newend = 0;
5870: my $newstart = $now;
5871: my $newkey = $aclnum.':public_'.$newend.'_'.$newstart;
5872: $changes{$action}{$newkey} = {
5873: type => 'public',
5874: time => {
5875: start => $newstart,
5876: end => $newend,
5877: },
5878: };
5879: my ($outcome,$deloutcome,$new_values,$translation) =
5880: &modify_access_controls($file_name,\%changes,$udom,$unum);
5881: return $outcome;
5882: }
5883: } else {
5884: return 'invalid';
5885: }
5886: }
5887:
5888: #------------------------------------------------------Get Marked as Read Only
5889:
5890: sub get_marked_as_readonly {
5891: my ($domain,$user,$what,$group) = @_;
5892: my $current_permissions = &get_portfile_permissions($domain,$user);
5893: my @readonly_files;
5894: my $cmp1=$what;
5895: if (ref($what)) { $cmp1=join('',@{$what}) };
5896: while (my ($file_name,$value) = each(%{$current_permissions})) {
5897: if (defined($group)) {
5898: if ($file_name !~ m-^\Q$group\E/-) {
5899: next;
5900: }
5901: }
5902: if (ref($value) eq "ARRAY"){
5903: foreach my $stored_what (@{$value}) {
5904: my $cmp2=$stored_what;
5905: if (ref($stored_what) eq 'ARRAY') {
5906: $cmp2=join('',@{$stored_what});
5907: }
5908: if ($cmp1 eq $cmp2) {
5909: push(@readonly_files, $file_name);
5910: last;
5911: } elsif (!defined($what)) {
5912: push(@readonly_files, $file_name);
5913: last;
5914: }
5915: }
5916: }
5917: }
5918: return @readonly_files;
5919: }
5920: #-----------------------------------------------------------Get Marked as Read Only Hash
5921:
5922: sub get_marked_as_readonly_hash {
5923: my ($current_permissions,$group,$what) = @_;
5924: my %readonly_files;
5925: while (my ($file_name,$value) = each(%{$current_permissions})) {
5926: if (defined($group)) {
5927: if ($file_name !~ m-^\Q$group\E/-) {
5928: next;
5929: }
5930: }
5931: if (ref($value) eq "ARRAY"){
5932: foreach my $stored_what (@{$value}) {
5933: if (ref($stored_what) eq 'ARRAY') {
5934: foreach my $lock_descriptor(@{$stored_what}) {
5935: if ($lock_descriptor eq 'graded') {
5936: $readonly_files{$file_name} = 'graded';
5937: } elsif ($lock_descriptor eq 'handback') {
5938: $readonly_files{$file_name} = 'handback';
5939: } else {
5940: if (!exists($readonly_files{$file_name})) {
5941: $readonly_files{$file_name} = 'locked';
5942: }
5943: }
5944: }
5945: }
5946: }
5947: }
5948: }
5949: return %readonly_files;
5950: }
5951: # ------------------------------------------------------------ Unmark as Read Only
5952:
5953: sub unmark_as_readonly {
5954: # unmarks $file_name (if $file_name is defined), or all files locked by $what
5955: # for portfolio submissions, $what contains [$symb,$crsid]
5956: my ($domain,$user,$what,$file_name,$group) = @_;
5957: $file_name = &declutter_portfile($file_name);
5958: my $symb_crs = $what;
5959: if (ref($what)) { $symb_crs=join('',@$what); }
5960: my %current_permissions = &dump('file_permissions',$domain,$user,$group);
5961: my ($tmp)=keys(%current_permissions);
5962: if ($tmp=~/^error:/) { undef(%current_permissions); }
5963: my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
5964: foreach my $file (@readonly_files) {
5965: my $clean_file = &declutter_portfile($file);
5966: if (defined($file_name) && ($file_name ne $clean_file)) { next; }
5967: my $current_locks = $current_permissions{$file};
5968: my @new_locks;
5969: my @del_keys;
5970: if (ref($current_locks) eq "ARRAY"){
5971: foreach my $locker (@{$current_locks}) {
5972: my $compare=$locker;
5973: if (ref($locker) eq 'ARRAY') {
5974: $compare=join('',@{$locker});
5975: if ($compare ne $symb_crs) {
5976: push(@new_locks, $locker);
5977: }
5978: }
5979: }
5980: if (scalar(@new_locks) > 0) {
5981: $current_permissions{$file} = \@new_locks;
5982: } else {
5983: push(@del_keys, $file);
5984: &del('file_permissions',\@del_keys, $domain, $user);
5985: delete($current_permissions{$file});
5986: }
5987: }
5988: }
5989: &put('file_permissions',\%current_permissions,$domain,$user);
5990: return;
5991: }
5992:
5993: # ------------------------------------------------------------ Directory lister
5994:
5995: sub dirlist {
5996: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
5997:
5998: $uri=~s/^\///;
5999: $uri=~s/\/$//;
6000: my ($udom, $uname);
6001: (undef,$udom,$uname)=split(/\//,$uri);
6002: if(defined($userdomain)) {
6003: $udom = $userdomain;
6004: }
6005: if(defined($username)) {
6006: $uname = $username;
6007: }
6008:
6009: my $dirRoot = $perlvar{'lonDocRoot'};
6010: if(defined($alternateDirectoryRoot)) {
6011: $dirRoot = $alternateDirectoryRoot;
6012: $dirRoot =~ s/\/$//;
6013: }
6014:
6015: if($udom) {
6016: if($uname) {
6017: my $listing = &reply('ls2:'.$dirRoot.'/'.$uri,
6018: &homeserver($uname,$udom));
6019: my @listing_results;
6020: if ($listing eq 'unknown_cmd') {
6021: $listing = &reply('ls:'.$dirRoot.'/'.$uri,
6022: &homeserver($uname,$udom));
6023: @listing_results = split(/:/,$listing);
6024: } else {
6025: @listing_results = map { &unescape($_); } split(/:/,$listing);
6026: }
6027: return @listing_results;
6028: } elsif(!defined($alternateDirectoryRoot)) {
6029: my %allusers;
6030: my %servers = &get_servers($udom,'library');
6031: foreach my $tryserver (keys(%servers)) {
6032: my $listing = &reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
6033: $udom, $tryserver);
6034: my @listing_results;
6035: if ($listing eq 'unknown_cmd') {
6036: $listing = &reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
6037: $udom, $tryserver);
6038: @listing_results = split(/:/,$listing);
6039: } else {
6040: @listing_results =
6041: map { &unescape($_); } split(/:/,$listing);
6042: }
6043: if ($listing_results[0] ne 'no_such_dir' &&
6044: $listing_results[0] ne 'empty' &&
6045: $listing_results[0] ne 'con_lost') {
6046: foreach my $line (@listing_results) {
6047: my ($entry) = split(/&/,$line,2);
6048: $allusers{$entry} = 1;
6049: }
6050: }
6051: }
6052: my $alluserstr='';
6053: foreach my $user (sort(keys(%allusers))) {
6054: $alluserstr.=$user.'&user:';
6055: }
6056: $alluserstr=~s/:$//;
6057: return split(/:/,$alluserstr);
6058: } else {
6059: return ('missing user name');
6060: }
6061: } elsif(!defined($alternateDirectoryRoot)) {
6062: my @all_domains = sort(&all_domains());
6063: foreach my $domain (@all_domains) {
6064: $domain = $perlvar{'lonDocRoot'}.'/res/'.$domain.'/&domain';
6065: }
6066: return @all_domains;
6067: } else {
6068: return ('missing domain');
6069: }
6070: }
6071:
6072: # --------------------------------------------- GetFileTimestamp
6073: # This function utilizes dirlist and returns the date stamp for
6074: # when it was last modified. It will also return an error of -1
6075: # if an error occurs
6076:
6077: ##
6078: ## FIXME: This subroutine assumes its caller knows something about the
6079: ## directory structure of the home server for the student ($root).
6080: ## Not a good assumption to make. Since this is for looking up files
6081: ## in user directories, the full path should be constructed by lond, not
6082: ## whatever machine we request data from.
6083: ##
6084: sub GetFileTimestamp {
6085: my ($studentDomain,$studentName,$filename,$root)=@_;
6086: $studentDomain = &LONCAPA::clean_domain($studentDomain);
6087: $studentName = &LONCAPA::clean_username($studentName);
6088: my $subdir=$studentName.'__';
6089: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
6090: my $proname="$studentDomain/$subdir/$studentName";
6091: $proname .= '/'.$filename;
6092: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
6093: $studentName, $root);
6094: my @stats = split('&', $fileStat);
6095: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
6096: # @stats contains first the filename, then the stat output
6097: return $stats[10]; # so this is 10 instead of 9.
6098: } else {
6099: return -1;
6100: }
6101: }
6102:
6103: sub stat_file {
6104: my ($uri) = @_;
6105: $uri = &clutter_with_no_wrapper($uri);
6106:
6107: my ($udom,$uname,$file,$dir);
6108: if ($uri =~ m-^/(uploaded|editupload)/-) {
6109: ($udom,$uname,$file) =
6110: ($uri =~ m-/(?:uploaded|editupload)/?($match_domain)/?($match_name)/?(.*)-);
6111: $file = 'userfiles/'.$file;
6112: $dir = &propath($udom,$uname);
6113: }
6114: if ($uri =~ m-^/res/-) {
6115: ($udom,$uname) =
6116: ($uri =~ m-/(?:res)/?($match_domain)/?($match_username)/-);
6117: $file = $uri;
6118: }
6119:
6120: if (!$udom || !$uname || !$file) {
6121: # unable to handle the uri
6122: return ();
6123: }
6124:
6125: my ($result) = &dirlist($file,$udom,$uname,$dir);
6126: my @stats = split('&', $result);
6127:
6128: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
6129: shift(@stats); #filename is first
6130: return @stats;
6131: }
6132: return ();
6133: }
6134:
6135: # -------------------------------------------------------- Value of a Condition
6136:
6137: # gets the value of a specific preevaluated condition
6138: # stored in the string $env{user.state.<cid>}
6139: # or looks up a condition reference in the bighash and if if hasn't
6140: # already been evaluated recurses into docondval to get the value of
6141: # the condition, then memoizing it to
6142: # $env{user.state.<cid>.<condition>}
6143: sub directcondval {
6144: my $number=shift;
6145: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
6146: &Apache::lonuserstate::evalstate();
6147: }
6148: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
6149: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
6150: } elsif ($number =~ /^_/) {
6151: my $sub_condition;
6152: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6153: &GDBM_READER(),0640)) {
6154: $sub_condition=$bighash{'conditions'.$number};
6155: untie(%bighash);
6156: }
6157: my $value = &docondval($sub_condition);
6158: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
6159: return $value;
6160: }
6161: if ($env{'user.state.'.$env{'request.course.id'}}) {
6162: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
6163: } else {
6164: return 2;
6165: }
6166: }
6167:
6168: # get the collection of conditions for this resource
6169: sub condval {
6170: my $condidx=shift;
6171: my $allpathcond='';
6172: foreach my $cond (split(/\|/,$condidx)) {
6173: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
6174: $allpathcond.=
6175: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
6176: }
6177: }
6178: $allpathcond=~s/\|$//;
6179: return &docondval($allpathcond);
6180: }
6181:
6182: #evaluates an expression of conditions
6183: sub docondval {
6184: my ($allpathcond) = @_;
6185: my $result=0;
6186: if ($env{'request.course.id'}
6187: && defined($allpathcond)) {
6188: my $operand='|';
6189: my @stack;
6190: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
6191: if ($chunk eq '(') {
6192: push @stack,($operand,$result);
6193: } elsif ($chunk eq ')') {
6194: my $before=pop @stack;
6195: if (pop @stack eq '&') {
6196: $result=$result>$before?$before:$result;
6197: } else {
6198: $result=$result>$before?$result:$before;
6199: }
6200: } elsif (($chunk eq '&') || ($chunk eq '|')) {
6201: $operand=$chunk;
6202: } else {
6203: my $new=directcondval($chunk);
6204: if ($operand eq '&') {
6205: $result=$result>$new?$new:$result;
6206: } else {
6207: $result=$result>$new?$result:$new;
6208: }
6209: }
6210: }
6211: }
6212: return $result;
6213: }
6214:
6215: # ---------------------------------------------------- Devalidate courseresdata
6216:
6217: sub devalidatecourseresdata {
6218: my ($coursenum,$coursedomain)=@_;
6219: my $hashid=$coursenum.':'.$coursedomain;
6220: &devalidate_cache_new('courseres',$hashid);
6221: }
6222:
6223:
6224: # --------------------------------------------------- Course Resourcedata Query
6225: #
6226: # Parameters:
6227: # $coursenum - Number of the course.
6228: # $coursedomain - Domain at which the course was created.
6229: # Returns:
6230: # A hash of the course parameters along (I think) with timestamps
6231: # and version info.
6232:
6233: sub get_courseresdata {
6234: my ($coursenum,$coursedomain)=@_;
6235: my $coursehom=&homeserver($coursenum,$coursedomain);
6236: my $hashid=$coursenum.':'.$coursedomain;
6237: my ($result,$cached)=&is_cached_new('courseres',$hashid);
6238: my %dumpreply;
6239: unless (defined($cached)) {
6240: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
6241: $result=\%dumpreply;
6242: my ($tmp) = keys(%dumpreply);
6243: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
6244: &do_cache_new('courseres',$hashid,$result,600);
6245: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
6246: return $tmp;
6247: } elsif ($tmp =~ /^(error)/) {
6248: $result=undef;
6249: &do_cache_new('courseres',$hashid,$result,600);
6250: }
6251: }
6252: return $result;
6253: }
6254:
6255: sub devalidateuserresdata {
6256: my ($uname,$udom)=@_;
6257: my $hashid="$udom:$uname";
6258: &devalidate_cache_new('userres',$hashid);
6259: }
6260:
6261: sub get_userresdata {
6262: my ($uname,$udom)=@_;
6263: #most student don\'t have any data set, check if there is some data
6264: if (&EXT_cache_status($udom,$uname)) { return undef; }
6265:
6266: my $hashid="$udom:$uname";
6267: my ($result,$cached)=&is_cached_new('userres',$hashid);
6268: if (!defined($cached)) {
6269: my %resourcedata=&dump('resourcedata',$udom,$uname);
6270: $result=\%resourcedata;
6271: &do_cache_new('userres',$hashid,$result,600);
6272: }
6273: my ($tmp)=keys(%$result);
6274: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
6275: return $result;
6276: }
6277: #error 2 occurs when the .db doesn't exist
6278: if ($tmp!~/error: 2 /) {
6279: &logthis("<font color=\"blue\">WARNING:".
6280: " Trying to get resource data for ".
6281: $uname." at ".$udom.": ".
6282: $tmp."</font>");
6283: } elsif ($tmp=~/error: 2 /) {
6284: #&EXT_cache_set($udom,$uname);
6285: &do_cache_new('userres',$hashid,undef,600);
6286: undef($tmp); # not really an error so don't send it back
6287: }
6288: return $tmp;
6289: }
6290: #----------------------------------------------- resdata - return resource data
6291: # Purpose:
6292: # Return resource data for either users or for a course.
6293: # Parameters:
6294: # $name - Course/user name.
6295: # $domain - Name of the domain the user/course is registered on.
6296: # $type - Type of thing $name is (must be 'course' or 'user'
6297: # @which - Array of names of resources desired.
6298: # Returns:
6299: # The value of the first reasource in @which that is found in the
6300: # resource hash.
6301: # Exceptional Conditions:
6302: # If the $type passed in is not valid (not the string 'course' or
6303: # 'user', an undefined reference is returned.
6304: # If none of the resources are found, an undef is returned
6305: sub resdata {
6306: my ($name,$domain,$type,@which)=@_;
6307: my $result;
6308: if ($type eq 'course') {
6309: $result=&get_courseresdata($name,$domain);
6310: } elsif ($type eq 'user') {
6311: $result=&get_userresdata($name,$domain);
6312: }
6313: if (!ref($result)) { return $result; }
6314: foreach my $item (@which) {
6315: if (defined($result->{$item})) {
6316: return $result->{$item};
6317: }
6318: }
6319: return undef;
6320: }
6321:
6322: #
6323: # EXT resource caching routines
6324: #
6325:
6326: sub clear_EXT_cache_status {
6327: &delenv('cache.EXT.');
6328: }
6329:
6330: sub EXT_cache_status {
6331: my ($target_domain,$target_user) = @_;
6332: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
6333: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
6334: # We know already the user has no data
6335: return 1;
6336: } else {
6337: return 0;
6338: }
6339: }
6340:
6341: sub EXT_cache_set {
6342: my ($target_domain,$target_user) = @_;
6343: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
6344: #&appenv($cachename => time);
6345: }
6346:
6347: # --------------------------------------------------------- Value of a Variable
6348: sub EXT {
6349:
6350: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
6351: unless ($varname) { return ''; }
6352: #get real user name/domain, courseid and symb
6353: my $courseid;
6354: my $publicuser;
6355: if ($symbparm) {
6356: $symbparm=&get_symb_from_alias($symbparm);
6357: }
6358: if (!($uname && $udom)) {
6359: (my $cursymb,$courseid,$udom,$uname,$publicuser)= &whichuser($symbparm);
6360: if (!$symbparm) { $symbparm=$cursymb; }
6361: } else {
6362: $courseid=$env{'request.course.id'};
6363: }
6364: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
6365: my $rest;
6366: if (defined($therest[0])) {
6367: $rest=join('.',@therest);
6368: } else {
6369: $rest='';
6370: }
6371:
6372: my $qualifierrest=$qualifier;
6373: if ($rest) { $qualifierrest.='.'.$rest; }
6374: my $spacequalifierrest=$space;
6375: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
6376: if ($realm eq 'user') {
6377: # --------------------------------------------------------------- user.resource
6378: if ($space eq 'resource') {
6379: if ( (defined($Apache::lonhomework::parsing_a_problem)
6380: || defined($Apache::lonhomework::parsing_a_task))
6381: &&
6382: ($symbparm eq &symbread()) ) {
6383: # if we are in the middle of processing the resource the
6384: # get the value we are planning on committing
6385: if (defined($Apache::lonhomework::results{$qualifierrest})) {
6386: return $Apache::lonhomework::results{$qualifierrest};
6387: } else {
6388: return $Apache::lonhomework::history{$qualifierrest};
6389: }
6390: } else {
6391: my %restored;
6392: if ($publicuser || $env{'request.state'} eq 'construct') {
6393: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
6394: } else {
6395: %restored=&restore($symbparm,$courseid,$udom,$uname);
6396: }
6397: return $restored{$qualifierrest};
6398: }
6399: # ----------------------------------------------------------------- user.access
6400: } elsif ($space eq 'access') {
6401: # FIXME - not supporting calls for a specific user
6402: return &allowed($qualifier,$rest);
6403: # ------------------------------------------ user.preferences, user.environment
6404: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
6405: if (($uname eq $env{'user.name'}) &&
6406: ($udom eq $env{'user.domain'})) {
6407: return $env{join('.',('environment',$qualifierrest))};
6408: } else {
6409: my %returnhash;
6410: if (!$publicuser) {
6411: %returnhash=&userenvironment($udom,$uname,
6412: $qualifierrest);
6413: }
6414: return $returnhash{$qualifierrest};
6415: }
6416: # ----------------------------------------------------------------- user.course
6417: } elsif ($space eq 'course') {
6418: # FIXME - not supporting calls for a specific user
6419: return $env{join('.',('request.course',$qualifier))};
6420: # ------------------------------------------------------------------- user.role
6421: } elsif ($space eq 'role') {
6422: # FIXME - not supporting calls for a specific user
6423: my ($role,$where)=split(/\./,$env{'request.role'});
6424: if ($qualifier eq 'value') {
6425: return $role;
6426: } elsif ($qualifier eq 'extent') {
6427: return $where;
6428: }
6429: # ----------------------------------------------------------------- user.domain
6430: } elsif ($space eq 'domain') {
6431: return $udom;
6432: # ------------------------------------------------------------------- user.name
6433: } elsif ($space eq 'name') {
6434: return $uname;
6435: # ---------------------------------------------------- Any other user namespace
6436: } else {
6437: my %reply;
6438: if (!$publicuser) {
6439: %reply=&get($space,[$qualifierrest],$udom,$uname);
6440: }
6441: return $reply{$qualifierrest};
6442: }
6443: } elsif ($realm eq 'query') {
6444: # ---------------------------------------------- pull stuff out of query string
6445: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
6446: [$spacequalifierrest]);
6447: return $env{'form.'.$spacequalifierrest};
6448: } elsif ($realm eq 'request') {
6449: # ------------------------------------------------------------- request.browser
6450: if ($space eq 'browser') {
6451: if ($qualifier eq 'textremote') {
6452: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
6453: return 1;
6454: } else {
6455: return 0;
6456: }
6457: } else {
6458: return $env{'browser.'.$qualifier};
6459: }
6460: # ------------------------------------------------------------ request.filename
6461: } else {
6462: return $env{'request.'.$spacequalifierrest};
6463: }
6464: } elsif ($realm eq 'course') {
6465: # ---------------------------------------------------------- course.description
6466: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
6467: } elsif ($realm eq 'resource') {
6468:
6469: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
6470: if (!$symbparm) { $symbparm=&symbread(); }
6471: }
6472:
6473: if ($space eq 'title') {
6474: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
6475: return &gettitle($symbparm);
6476: }
6477:
6478: if ($space eq 'map') {
6479: my ($map) = &decode_symb($symbparm);
6480: return &symbread($map);
6481: }
6482: if ($space eq 'filename') {
6483: if ($symbparm) {
6484: return &clutter((&decode_symb($symbparm))[2]);
6485: }
6486: return &hreflocation('',$env{'request.filename'});
6487: }
6488:
6489: my ($section, $group, @groups);
6490: my ($courselevelm,$courselevel);
6491: if ($symbparm && defined($courseid) &&
6492: $courseid eq $env{'request.course.id'}) {
6493:
6494: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
6495:
6496: # ----------------------------------------------------- Cascading lookup scheme
6497: my $symbp=$symbparm;
6498: my $mapp=&deversion((&decode_symb($symbp))[0]);
6499:
6500: my $symbparm=$symbp.'.'.$spacequalifierrest;
6501: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
6502:
6503: if (($env{'user.name'} eq $uname) &&
6504: ($env{'user.domain'} eq $udom)) {
6505: $section=$env{'request.course.sec'};
6506: @groups = split(/:/,$env{'request.course.groups'});
6507: @groups=&sort_course_groups($courseid,@groups);
6508: } else {
6509: if (! defined($usection)) {
6510: $section=&getsection($udom,$uname,$courseid);
6511: } else {
6512: $section = $usection;
6513: }
6514: @groups = &get_users_groups($udom,$uname,$courseid);
6515: }
6516:
6517: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
6518: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
6519: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
6520:
6521: $courselevel=$courseid.'.'.$spacequalifierrest;
6522: my $courselevelr=$courseid.'.'.$symbparm;
6523: $courselevelm=$courseid.'.'.$mapparm;
6524:
6525: # ----------------------------------------------------------- first, check user
6526:
6527: my $userreply=&resdata($uname,$udom,'user',
6528: ($courselevelr,$courselevelm,
6529: $courselevel));
6530: if (defined($userreply)) { return $userreply; }
6531:
6532: # ------------------------------------------------ second, check some of course
6533: my $coursereply;
6534: if (@groups > 0) {
6535: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
6536: $mapparm,$spacequalifierrest);
6537: if (defined($coursereply)) { return $coursereply; }
6538: }
6539:
6540: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6541: $env{'course.'.$courseid.'.domain'},
6542: 'course',
6543: ($seclevelr,$seclevelm,$seclevel,
6544: $courselevelr));
6545: if (defined($coursereply)) { return $coursereply; }
6546:
6547: # ------------------------------------------------------ third, check map parms
6548: my %parmhash=();
6549: my $thisparm='';
6550: if (tie(%parmhash,'GDBM_File',
6551: $env{'request.course.fn'}.'_parms.db',
6552: &GDBM_READER(),0640)) {
6553: $thisparm=$parmhash{$symbparm};
6554: untie(%parmhash);
6555: }
6556: if ($thisparm) { return $thisparm; }
6557: }
6558: # ------------------------------------------ fourth, look in resource metadata
6559:
6560: $spacequalifierrest=~s/\./\_/;
6561: my $filename;
6562: if (!$symbparm) { $symbparm=&symbread(); }
6563: if ($symbparm) {
6564: $filename=(&decode_symb($symbparm))[2];
6565: } else {
6566: $filename=$env{'request.filename'};
6567: }
6568: my $metadata=&metadata($filename,$spacequalifierrest);
6569: if (defined($metadata)) { return $metadata; }
6570: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
6571: if (defined($metadata)) { return $metadata; }
6572:
6573: # ---------------------------------------------- fourth, look in rest pf course
6574: if ($symbparm && defined($courseid) &&
6575: $courseid eq $env{'request.course.id'}) {
6576: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6577: $env{'course.'.$courseid.'.domain'},
6578: 'course',
6579: ($courselevelm,$courselevel));
6580: if (defined($coursereply)) { return $coursereply; }
6581: }
6582: # ------------------------------------------------------------------ Cascade up
6583: unless ($space eq '0') {
6584: my @parts=split(/_/,$space);
6585: my $id=pop(@parts);
6586: my $part=join('_',@parts);
6587: if ($part eq '') { $part='0'; }
6588: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
6589: $symbparm,$udom,$uname,$section,1);
6590: if (defined($partgeneral)) { return $partgeneral; }
6591: }
6592: if ($recurse) { return undef; }
6593: my $pack_def=&packages_tab_default($filename,$varname);
6594: if (defined($pack_def)) { return $pack_def; }
6595:
6596: # ---------------------------------------------------- Any other user namespace
6597: } elsif ($realm eq 'environment') {
6598: # ----------------------------------------------------------------- environment
6599: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
6600: return $env{'environment.'.$spacequalifierrest};
6601: } else {
6602: if ($uname eq 'anonymous' && $udom eq '') {
6603: return '';
6604: }
6605: my %returnhash=&userenvironment($udom,$uname,
6606: $spacequalifierrest);
6607: return $returnhash{$spacequalifierrest};
6608: }
6609: } elsif ($realm eq 'system') {
6610: # ----------------------------------------------------------------- system.time
6611: if ($space eq 'time') {
6612: return time;
6613: }
6614: } elsif ($realm eq 'server') {
6615: # ----------------------------------------------------------------- system.time
6616: if ($space eq 'name') {
6617: return $ENV{'SERVER_NAME'};
6618: }
6619: }
6620: return '';
6621: }
6622:
6623: sub check_group_parms {
6624: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
6625: my @groupitems = ();
6626: my $resultitem;
6627: my @levels = ($symbparm,$mapparm,$what);
6628: foreach my $group (@{$groups}) {
6629: foreach my $level (@levels) {
6630: my $item = $courseid.'.['.$group.'].'.$level;
6631: push(@groupitems,$item);
6632: }
6633: }
6634: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
6635: $env{'course.'.$courseid.'.domain'},
6636: 'course',@groupitems);
6637: return $coursereply;
6638: }
6639:
6640: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
6641: my ($courseid,@groups) = @_;
6642: @groups = sort(@groups);
6643: return @groups;
6644: }
6645:
6646: sub packages_tab_default {
6647: my ($uri,$varname)=@_;
6648: my (undef,$part,$name)=split(/\./,$varname);
6649:
6650: my (@extension,@specifics,$do_default);
6651: foreach my $package (split(/,/,&metadata($uri,'packages'))) {
6652: my ($pack_type,$pack_part)=split(/_/,$package,2);
6653: if ($pack_type eq 'default') {
6654: $do_default=1;
6655: } elsif ($pack_type eq 'extension') {
6656: push(@extension,[$package,$pack_type,$pack_part]);
6657: } elsif ($pack_part eq $part || $pack_type eq 'part') {
6658: # only look at packages defaults for packages that this id is
6659: push(@specifics,[$package,$pack_type,$pack_part]);
6660: }
6661: }
6662: # first look for a package that matches the requested part id
6663: foreach my $package (@specifics) {
6664: my (undef,$pack_type,$pack_part)=@{$package};
6665: next if ($pack_part ne $part);
6666: if (defined($packagetab{"$pack_type&$name&default"})) {
6667: return $packagetab{"$pack_type&$name&default"};
6668: }
6669: }
6670: # look for any possible matching non extension_ package
6671: foreach my $package (@specifics) {
6672: my (undef,$pack_type,$pack_part)=@{$package};
6673: if (defined($packagetab{"$pack_type&$name&default"})) {
6674: return $packagetab{"$pack_type&$name&default"};
6675: }
6676: if ($pack_type eq 'part') { $pack_part='0'; }
6677: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
6678: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
6679: }
6680: }
6681: # look for any posible extension_ match
6682: foreach my $package (@extension) {
6683: my ($package,$pack_type)=@{$package};
6684: if (defined($packagetab{"$pack_type&$name&default"})) {
6685: return $packagetab{"$pack_type&$name&default"};
6686: }
6687: if (defined($packagetab{$package."&$name&default"})) {
6688: return $packagetab{$package."&$name&default"};
6689: }
6690: }
6691: # look for a global default setting
6692: if ($do_default && defined($packagetab{"default&$name&default"})) {
6693: return $packagetab{"default&$name&default"};
6694: }
6695: return undef;
6696: }
6697:
6698: sub add_prefix_and_part {
6699: my ($prefix,$part)=@_;
6700: my $keyroot;
6701: if (defined($prefix) && $prefix !~ /^__/) {
6702: # prefix that has a part already
6703: $keyroot=$prefix;
6704: } elsif (defined($prefix)) {
6705: # prefix that is missing a part
6706: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
6707: } else {
6708: # no prefix at all
6709: if (defined($part)) { $keyroot='_'.$part; }
6710: }
6711: return $keyroot;
6712: }
6713:
6714: # ---------------------------------------------------------------- Get metadata
6715:
6716: my %metaentry;
6717: sub metadata {
6718: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
6719: $uri=&declutter($uri);
6720: # if it is a non metadata possible uri return quickly
6721: if (($uri eq '') ||
6722: (($uri =~ m|^/*adm/|) &&
6723: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
6724: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
6725: ($uri =~ m|home/$match_username/public_html/|)) {
6726: return undef;
6727: }
6728: my $filename=$uri;
6729: $uri=~s/\.meta$//;
6730: #
6731: # Is the metadata already cached?
6732: # Look at timestamp of caching
6733: # Everything is cached by the main uri, libraries are never directly cached
6734: #
6735: if (!defined($liburi)) {
6736: my ($result,$cached)=&is_cached_new('meta',$uri);
6737: if (defined($cached)) { return $result->{':'.$what}; }
6738: }
6739: {
6740: #
6741: # Is this a recursive call for a library?
6742: #
6743: # if (! exists($metacache{$uri})) {
6744: # $metacache{$uri}={};
6745: # }
6746: if ($liburi) {
6747: $liburi=&declutter($liburi);
6748: $filename=$liburi;
6749: } else {
6750: &devalidate_cache_new('meta',$uri);
6751: undef(%metaentry);
6752: }
6753: my %metathesekeys=();
6754: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
6755: my $metastring;
6756: if ($uri !~ m -^(editupload)/-) {
6757: my $file=&filelocation('',&clutter($filename));
6758: #push(@{$metaentry{$uri.'.file'}},$file);
6759: $metastring=&getfile($file);
6760: }
6761: my $parser=HTML::LCParser->new(\$metastring);
6762: my $token;
6763: undef %metathesekeys;
6764: while ($token=$parser->get_token) {
6765: if ($token->[0] eq 'S') {
6766: if (defined($token->[2]->{'package'})) {
6767: #
6768: # This is a package - get package info
6769: #
6770: my $package=$token->[2]->{'package'};
6771: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6772: if (defined($token->[2]->{'id'})) {
6773: $keyroot.='_'.$token->[2]->{'id'};
6774: }
6775: if ($metaentry{':packages'}) {
6776: $metaentry{':packages'}.=','.$package.$keyroot;
6777: } else {
6778: $metaentry{':packages'}=$package.$keyroot;
6779: }
6780: foreach my $pack_entry (keys(%packagetab)) {
6781: my $part=$keyroot;
6782: $part=~s/^\_//;
6783: if ($pack_entry=~/^\Q$package\E\&/ ||
6784: $pack_entry=~/^\Q$package\E_0\&/) {
6785: my ($pack,$name,$subp)=split(/\&/,$pack_entry);
6786: # ignore package.tab specified default values
6787: # here &package_tab_default() will fetch those
6788: if ($subp eq 'default') { next; }
6789: my $value=$packagetab{$pack_entry};
6790: my $unikey;
6791: if ($pack =~ /_0$/) {
6792: $unikey='parameter_0_'.$name;
6793: $part=0;
6794: } else {
6795: $unikey='parameter'.$keyroot.'_'.$name;
6796: }
6797: if ($subp eq 'display') {
6798: $value.=' [Part: '.$part.']';
6799: }
6800: $metaentry{':'.$unikey.'.part'}=$part;
6801: $metathesekeys{$unikey}=1;
6802: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6803: $metaentry{':'.$unikey.'.'.$subp}=$value;
6804: }
6805: if (defined($metaentry{':'.$unikey.'.default'})) {
6806: $metaentry{':'.$unikey}=
6807: $metaentry{':'.$unikey.'.default'};
6808: }
6809: }
6810: }
6811: } else {
6812: #
6813: # This is not a package - some other kind of start tag
6814: #
6815: my $entry=$token->[1];
6816: my $unikey;
6817: if ($entry eq 'import') {
6818: $unikey='';
6819: } else {
6820: $unikey=$entry;
6821: }
6822: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6823:
6824: if (defined($token->[2]->{'id'})) {
6825: $unikey.='_'.$token->[2]->{'id'};
6826: }
6827:
6828: if ($entry eq 'import') {
6829: #
6830: # Importing a library here
6831: #
6832: if ($depthcount<20) {
6833: my $location=$parser->get_text('/import');
6834: my $dir=$filename;
6835: $dir=~s|[^/]*$||;
6836: $location=&filelocation($dir,$location);
6837: my $metadata =
6838: &metadata($uri,'keys', $location,$unikey,
6839: $depthcount+1);
6840: foreach my $meta (split(',',$metadata)) {
6841: $metaentry{':'.$meta}=$metaentry{':'.$meta};
6842: $metathesekeys{$meta}=1;
6843: }
6844: }
6845: } else {
6846:
6847: if (defined($token->[2]->{'name'})) {
6848: $unikey.='_'.$token->[2]->{'name'};
6849: }
6850: $metathesekeys{$unikey}=1;
6851: foreach my $param (@{$token->[3]}) {
6852: $metaentry{':'.$unikey.'.'.$param} =
6853: $token->[2]->{$param};
6854: }
6855: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
6856: my $default=$metaentry{':'.$unikey.'.default'};
6857: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
6858: # only ws inside the tag, and not in default, so use default
6859: # as value
6860: $metaentry{':'.$unikey}=$default;
6861: } elsif ( $internaltext =~ /\S/ ) {
6862: # something interesting inside the tag
6863: $metaentry{':'.$unikey}=$internaltext;
6864: } else {
6865: # no interesting values, don't set a default
6866: }
6867: # end of not-a-package not-a-library import
6868: }
6869: # end of not-a-package start tag
6870: }
6871: # the next is the end of "start tag"
6872: }
6873: }
6874: my ($extension) = ($uri =~ /\.(\w+)$/);
6875: $extension = lc($extension);
6876: if ($extension eq 'htm') { $extension='html'; }
6877:
6878: foreach my $key (keys(%packagetab)) {
6879: #no specific packages #how's our extension
6880: if ($key!~/^extension_\Q$extension\E&/) { next; }
6881: &metadata_create_package_def($uri,$key,'extension_'.$extension,
6882: \%metathesekeys);
6883: }
6884:
6885: if (!exists($metaentry{':packages'})
6886: || $packagetab{"import_defaults&extension_$extension"}) {
6887: foreach my $key (keys(%packagetab)) {
6888: #no specific packages well let's get default then
6889: if ($key!~/^default&/) { next; }
6890: &metadata_create_package_def($uri,$key,'default',
6891: \%metathesekeys);
6892: }
6893: }
6894: # are there custom rights to evaluate
6895: if ($metaentry{':copyright'} eq 'custom') {
6896:
6897: #
6898: # Importing a rights file here
6899: #
6900: unless ($depthcount) {
6901: my $location=$metaentry{':customdistributionfile'};
6902: my $dir=$filename;
6903: $dir=~s|[^/]*$||;
6904: $location=&filelocation($dir,$location);
6905: my $rights_metadata =
6906: &metadata($uri,'keys',$location,'_rights',
6907: $depthcount+1);
6908: foreach my $rights (split(',',$rights_metadata)) {
6909: #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
6910: $metathesekeys{$rights}=1;
6911: }
6912: }
6913: }
6914: # uniqifiy package listing
6915: my %seen;
6916: my @uniq_packages =
6917: grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
6918: $metaentry{':packages'} = join(',',@uniq_packages);
6919:
6920: $metaentry{':keys'} = join(',',keys(%metathesekeys));
6921: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
6922: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
6923: &do_cache_new('meta',$uri,\%metaentry,60*60);
6924: # this is the end of "was not already recently cached
6925: }
6926: return $metaentry{':'.$what};
6927: }
6928:
6929: sub metadata_create_package_def {
6930: my ($uri,$key,$package,$metathesekeys)=@_;
6931: my ($pack,$name,$subp)=split(/\&/,$key);
6932: if ($subp eq 'default') { next; }
6933:
6934: if (defined($metaentry{':packages'})) {
6935: $metaentry{':packages'}.=','.$package;
6936: } else {
6937: $metaentry{':packages'}=$package;
6938: }
6939: my $value=$packagetab{$key};
6940: my $unikey;
6941: $unikey='parameter_0_'.$name;
6942: $metaentry{':'.$unikey.'.part'}=0;
6943: $$metathesekeys{$unikey}=1;
6944: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6945: $metaentry{':'.$unikey.'.'.$subp}=$value;
6946: }
6947: if (defined($metaentry{':'.$unikey.'.default'})) {
6948: $metaentry{':'.$unikey}=
6949: $metaentry{':'.$unikey.'.default'};
6950: }
6951: }
6952:
6953: sub metadata_generate_part0 {
6954: my ($metadata,$metacache,$uri) = @_;
6955: my %allnames;
6956: foreach my $metakey (keys(%$metadata)) {
6957: if ($metakey=~/^parameter\_(.*)/) {
6958: my $part=$$metacache{':'.$metakey.'.part'};
6959: my $name=$$metacache{':'.$metakey.'.name'};
6960: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
6961: $allnames{$name}=$part;
6962: }
6963: }
6964: }
6965: foreach my $name (keys(%allnames)) {
6966: $$metadata{"parameter_0_$name"}=1;
6967: my $key=":parameter_0_$name";
6968: $$metacache{"$key.part"}='0';
6969: $$metacache{"$key.name"}=$name;
6970: $$metacache{"$key.type"}=$$metacache{':parameter_'.
6971: $allnames{$name}.'_'.$name.
6972: '.type'};
6973: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
6974: '.display'};
6975: my $expr='[Part: '.$allnames{$name}.']';
6976: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
6977: $$metacache{"$key.display"}=$olddis;
6978: }
6979: }
6980:
6981: # ------------------------------------------------------ Devalidate title cache
6982:
6983: sub devalidate_title_cache {
6984: my ($url)=@_;
6985: if (!$env{'request.course.id'}) { return; }
6986: my $symb=&symbread($url);
6987: if (!$symb) { return; }
6988: my $key=$env{'request.course.id'}."\0".$symb;
6989: &devalidate_cache_new('title',$key);
6990: }
6991:
6992: # ------------------------------------------------- Get the title of a resource
6993:
6994: sub gettitle {
6995: my $urlsymb=shift;
6996: my $symb=&symbread($urlsymb);
6997: if ($symb) {
6998: my $key=$env{'request.course.id'}."\0".$symb;
6999: my ($result,$cached)=&is_cached_new('title',$key);
7000: if (defined($cached)) {
7001: return $result;
7002: }
7003: my ($map,$resid,$url)=&decode_symb($symb);
7004: my $title='';
7005: if (!$map && $resid == 0 && $url =~/default\.sequence$/) {
7006: $title = $env{'course.'.$env{'request.course.id'}.'.description'};
7007: } else {
7008: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
7009: &GDBM_READER(),0640)) {
7010: my $mapid=$bighash{'map_pc_'.&clutter($map)};
7011: $title=$bighash{'title_'.$mapid.'.'.$resid};
7012: untie(%bighash);
7013: }
7014: }
7015: $title=~s/\&colon\;/\:/gs;
7016: if ($title) {
7017: return &do_cache_new('title',$key,$title,600);
7018: }
7019: $urlsymb=$url;
7020: }
7021: my $title=&metadata($urlsymb,'title');
7022: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
7023: return $title;
7024: }
7025:
7026: sub get_slot {
7027: my ($which,$cnum,$cdom)=@_;
7028: if (!$cnum || !$cdom) {
7029: (undef,my $courseid)=&whichuser();
7030: $cdom=$env{'course.'.$courseid.'.domain'};
7031: $cnum=$env{'course.'.$courseid.'.num'};
7032: }
7033: my $key=join("\0",'slots',$cdom,$cnum,$which);
7034: my %slotinfo;
7035: if (exists($remembered{$key})) {
7036: $slotinfo{$which} = $remembered{$key};
7037: } else {
7038: %slotinfo=&get('slots',[$which],$cdom,$cnum);
7039: &Apache::lonhomework::showhash(%slotinfo);
7040: my ($tmp)=keys(%slotinfo);
7041: if ($tmp=~/^error:/) { return (); }
7042: $remembered{$key} = $slotinfo{$which};
7043: }
7044: if (ref($slotinfo{$which}) eq 'HASH') {
7045: return %{$slotinfo{$which}};
7046: }
7047: return $slotinfo{$which};
7048: }
7049: # ------------------------------------------------- Update symbolic store links
7050:
7051: sub symblist {
7052: my ($mapname,%newhash)=@_;
7053: $mapname=&deversion(&declutter($mapname));
7054: my %hash;
7055: if (($env{'request.course.fn'}) && (%newhash)) {
7056: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
7057: &GDBM_WRCREAT(),0640)) {
7058: foreach my $url (keys %newhash) {
7059: next if ($url eq 'last_known'
7060: && $env{'form.no_update_last_known'});
7061: $hash{declutter($url)}=&encode_symb($mapname,
7062: $newhash{$url}->[1],
7063: $newhash{$url}->[0]);
7064: }
7065: if (untie(%hash)) {
7066: return 'ok';
7067: }
7068: }
7069: }
7070: return 'error';
7071: }
7072:
7073: # --------------------------------------------------------------- Verify a symb
7074:
7075: sub symbverify {
7076: my ($symb,$thisurl)=@_;
7077: my $thisfn=$thisurl;
7078: $thisfn=&declutter($thisfn);
7079: # direct jump to resource in page or to a sequence - will construct own symbs
7080: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
7081: # check URL part
7082: my ($map,$resid,$url)=&decode_symb($symb);
7083:
7084: unless ($url eq $thisfn) { return 0; }
7085:
7086: $symb=&symbclean($symb);
7087: $thisurl=&deversion($thisurl);
7088: $thisfn=&deversion($thisfn);
7089:
7090: my %bighash;
7091: my $okay=0;
7092:
7093: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
7094: &GDBM_READER(),0640)) {
7095: my $ids=$bighash{'ids_'.&clutter($thisurl)};
7096: unless ($ids) {
7097: $ids=$bighash{'ids_/'.$thisurl};
7098: }
7099: if ($ids) {
7100: # ------------------------------------------------------------------- Has ID(s)
7101: foreach my $id (split(/\,/,$ids)) {
7102: my ($mapid,$resid)=split(/\./,$id);
7103: if (
7104: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
7105: eq $symb) {
7106: if (($env{'request.role.adv'}) ||
7107: $bighash{'encrypted_'.$id} eq $env{'request.enc'}) {
7108: $okay=1;
7109: }
7110: }
7111: }
7112: }
7113: untie(%bighash);
7114: }
7115: return $okay;
7116: }
7117:
7118: # --------------------------------------------------------------- Clean-up symb
7119:
7120: sub symbclean {
7121: my $symb=shift;
7122: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
7123: # remove version from map
7124: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
7125:
7126: # remove version from URL
7127: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
7128:
7129: # remove wrapper
7130:
7131: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
7132: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
7133: return $symb;
7134: }
7135:
7136: # ---------------------------------------------- Split symb to find map and url
7137:
7138: sub encode_symb {
7139: my ($map,$resid,$url)=@_;
7140: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
7141: }
7142:
7143: sub decode_symb {
7144: my $symb=shift;
7145: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
7146: my ($map,$resid,$url)=split(/___/,$symb);
7147: return (&fixversion($map),$resid,&fixversion($url));
7148: }
7149:
7150: sub fixversion {
7151: my $fn=shift;
7152: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
7153: my %bighash;
7154: my $uri=&clutter($fn);
7155: my $key=$env{'request.course.id'}.'_'.$uri;
7156: # is this cached?
7157: my ($result,$cached)=&is_cached_new('courseresversion',$key);
7158: if (defined($cached)) { return $result; }
7159: # unfortunately not cached, or expired
7160: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
7161: &GDBM_READER(),0640)) {
7162: if ($bighash{'version_'.$uri}) {
7163: my $version=$bighash{'version_'.$uri};
7164: unless (($version eq 'mostrecent') ||
7165: ($version==&getversion($uri))) {
7166: $uri=~s/\.(\w+)$/\.$version\.$1/;
7167: }
7168: }
7169: untie %bighash;
7170: }
7171: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
7172: }
7173:
7174: sub deversion {
7175: my $url=shift;
7176: $url=~s/\.\d+\.(\w+)$/\.$1/;
7177: return $url;
7178: }
7179:
7180: # ------------------------------------------------------ Return symb list entry
7181:
7182: sub symbread {
7183: my ($thisfn,$donotrecurse)=@_;
7184: my $cache_str='request.symbread.cached.'.$thisfn;
7185: if (defined($env{$cache_str})) { return $env{$cache_str}; }
7186: # no filename provided? try from environment
7187: unless ($thisfn) {
7188: if ($env{'request.symb'}) {
7189: return $env{$cache_str}=&symbclean($env{'request.symb'});
7190: }
7191: $thisfn=$env{'request.filename'};
7192: }
7193: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7194: # is that filename actually a symb? Verify, clean, and return
7195: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
7196: if (&symbverify($thisfn,$1)) {
7197: return $env{$cache_str}=&symbclean($thisfn);
7198: }
7199: }
7200: $thisfn=declutter($thisfn);
7201: my %hash;
7202: my %bighash;
7203: my $syval='';
7204: if (($env{'request.course.fn'}) && ($thisfn)) {
7205: my $targetfn = $thisfn;
7206: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
7207: $targetfn = 'adm/wrapper/'.$thisfn;
7208: }
7209: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
7210: $targetfn=$1;
7211: }
7212: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
7213: &GDBM_READER(),0640)) {
7214: $syval=$hash{$targetfn};
7215: untie(%hash);
7216: }
7217: # ---------------------------------------------------------- There was an entry
7218: if ($syval) {
7219: #unless ($syval=~/\_\d+$/) {
7220: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
7221: #&appenv('request.ambiguous' => $thisfn);
7222: #return $env{$cache_str}='';
7223: #}
7224: #$syval.=$1;
7225: #}
7226: } else {
7227: # ------------------------------------------------------- Was not in symb table
7228: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
7229: &GDBM_READER(),0640)) {
7230: # ---------------------------------------------- Get ID(s) for current resource
7231: my $ids=$bighash{'ids_'.&clutter($thisfn)};
7232: unless ($ids) {
7233: $ids=$bighash{'ids_/'.$thisfn};
7234: }
7235: unless ($ids) {
7236: # alias?
7237: $ids=$bighash{'mapalias_'.$thisfn};
7238: }
7239: if ($ids) {
7240: # ------------------------------------------------------------------- Has ID(s)
7241: my @possibilities=split(/\,/,$ids);
7242: if ($#possibilities==0) {
7243: # ----------------------------------------------- There is only one possibility
7244: my ($mapid,$resid)=split(/\./,$ids);
7245: $syval=&encode_symb($bighash{'map_id_'.$mapid},
7246: $resid,$thisfn);
7247: } elsif (!$donotrecurse) {
7248: # ------------------------------------------ There is more than one possibility
7249: my $realpossible=0;
7250: foreach my $id (@possibilities) {
7251: my $file=$bighash{'src_'.$id};
7252: if (&allowed('bre',$file)) {
7253: my ($mapid,$resid)=split(/\./,$id);
7254: if ($bighash{'map_type_'.$mapid} ne 'page') {
7255: $realpossible++;
7256: $syval=&encode_symb($bighash{'map_id_'.$mapid},
7257: $resid,$thisfn);
7258: }
7259: }
7260: }
7261: if ($realpossible!=1) { $syval=''; }
7262: } else {
7263: $syval='';
7264: }
7265: }
7266: untie(%bighash)
7267: }
7268: }
7269: if ($syval) {
7270: return $env{$cache_str}=$syval;
7271: }
7272: }
7273: &appenv('request.ambiguous' => $thisfn);
7274: return $env{$cache_str}='';
7275: }
7276:
7277: # ---------------------------------------------------------- Return random seed
7278:
7279: sub numval {
7280: my $txt=shift;
7281: $txt=~tr/A-J/0-9/;
7282: $txt=~tr/a-j/0-9/;
7283: $txt=~tr/K-T/0-9/;
7284: $txt=~tr/k-t/0-9/;
7285: $txt=~tr/U-Z/0-5/;
7286: $txt=~tr/u-z/0-5/;
7287: $txt=~s/\D//g;
7288: if ($_64bit) { if ($txt > 2**32) { return -1; } }
7289: return int($txt);
7290: }
7291:
7292: sub numval2 {
7293: my $txt=shift;
7294: $txt=~tr/A-J/0-9/;
7295: $txt=~tr/a-j/0-9/;
7296: $txt=~tr/K-T/0-9/;
7297: $txt=~tr/k-t/0-9/;
7298: $txt=~tr/U-Z/0-5/;
7299: $txt=~tr/u-z/0-5/;
7300: $txt=~s/\D//g;
7301: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
7302: my $total;
7303: foreach my $val (@txts) { $total+=$val; }
7304: if ($_64bit) { if ($total > 2**32) { return -1; } }
7305: return int($total);
7306: }
7307:
7308: sub numval3 {
7309: use integer;
7310: my $txt=shift;
7311: $txt=~tr/A-J/0-9/;
7312: $txt=~tr/a-j/0-9/;
7313: $txt=~tr/K-T/0-9/;
7314: $txt=~tr/k-t/0-9/;
7315: $txt=~tr/U-Z/0-5/;
7316: $txt=~tr/u-z/0-5/;
7317: $txt=~s/\D//g;
7318: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
7319: my $total;
7320: foreach my $val (@txts) { $total+=$val; }
7321: if ($_64bit) { $total=(($total<<32)>>32); }
7322: return $total;
7323: }
7324:
7325: sub digest {
7326: my ($data)=@_;
7327: my $digest=&Digest::MD5::md5($data);
7328: my ($a,$b,$c,$d)=unpack("iiii",$digest);
7329: my ($e,$f);
7330: {
7331: use integer;
7332: $e=($a+$b);
7333: $f=($c+$d);
7334: if ($_64bit) {
7335: $e=(($e<<32)>>32);
7336: $f=(($f<<32)>>32);
7337: }
7338: }
7339: if (wantarray) {
7340: return ($e,$f);
7341: } else {
7342: my $g;
7343: {
7344: use integer;
7345: $g=($e+$f);
7346: if ($_64bit) {
7347: $g=(($g<<32)>>32);
7348: }
7349: }
7350: return $g;
7351: }
7352: }
7353:
7354: sub latest_rnd_algorithm_id {
7355: return '64bit5';
7356: }
7357:
7358: sub get_rand_alg {
7359: my ($courseid)=@_;
7360: if (!$courseid) { $courseid=(&whichuser())[1]; }
7361: if ($courseid) {
7362: return $env{"course.$courseid.rndseed"};
7363: }
7364: return &latest_rnd_algorithm_id();
7365: }
7366:
7367: sub validCODE {
7368: my ($CODE)=@_;
7369: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
7370: return 0;
7371: }
7372:
7373: sub getCODE {
7374: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
7375: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
7376: defined($Apache::lonhomework::parsing_a_task) ) &&
7377: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
7378: return $Apache::lonhomework::history{'resource.CODE'};
7379: }
7380: return undef;
7381: }
7382:
7383: sub rndseed {
7384: my ($symb,$courseid,$domain,$username)=@_;
7385: my ($wsymb,$wcourseid,$wdomain,$wusername)=&whichuser();
7386: if (!defined($symb)) {
7387: unless ($symb=$wsymb) { return time; }
7388: }
7389: if (!$courseid) { $courseid=$wcourseid; }
7390: if (!$domain) { $domain=$wdomain; }
7391: if (!$username) { $username=$wusername }
7392: my $which=&get_rand_alg();
7393:
7394: if (defined(&getCODE())) {
7395: if ($which eq '64bit5') {
7396: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
7397: } elsif ($which eq '64bit4') {
7398: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
7399: } else {
7400: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
7401: }
7402: } elsif ($which eq '64bit5') {
7403: return &rndseed_64bit5($symb,$courseid,$domain,$username);
7404: } elsif ($which eq '64bit4') {
7405: return &rndseed_64bit4($symb,$courseid,$domain,$username);
7406: } elsif ($which eq '64bit3') {
7407: return &rndseed_64bit3($symb,$courseid,$domain,$username);
7408: } elsif ($which eq '64bit2') {
7409: return &rndseed_64bit2($symb,$courseid,$domain,$username);
7410: } elsif ($which eq '64bit') {
7411: return &rndseed_64bit($symb,$courseid,$domain,$username);
7412: }
7413: return &rndseed_32bit($symb,$courseid,$domain,$username);
7414: }
7415:
7416: sub rndseed_32bit {
7417: my ($symb,$courseid,$domain,$username)=@_;
7418: {
7419: use integer;
7420: my $symbchck=unpack("%32C*",$symb) << 27;
7421: my $symbseed=numval($symb) << 22;
7422: my $namechck=unpack("%32C*",$username) << 17;
7423: my $nameseed=numval($username) << 12;
7424: my $domainseed=unpack("%32C*",$domain) << 7;
7425: my $courseseed=unpack("%32C*",$courseid);
7426: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
7427: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7428: #&logthis("rndseed :$num:$symb");
7429: if ($_64bit) { $num=(($num<<32)>>32); }
7430: return $num;
7431: }
7432: }
7433:
7434: sub rndseed_64bit {
7435: my ($symb,$courseid,$domain,$username)=@_;
7436: {
7437: use integer;
7438: my $symbchck=unpack("%32S*",$symb) << 21;
7439: my $symbseed=numval($symb) << 10;
7440: my $namechck=unpack("%32S*",$username);
7441:
7442: my $nameseed=numval($username) << 21;
7443: my $domainseed=unpack("%32S*",$domain) << 10;
7444: my $courseseed=unpack("%32S*",$courseid);
7445:
7446: my $num1=$symbchck+$symbseed+$namechck;
7447: my $num2=$nameseed+$domainseed+$courseseed;
7448: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7449: #&logthis("rndseed :$num:$symb");
7450: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7451: return "$num1,$num2";
7452: }
7453: }
7454:
7455: sub rndseed_64bit2 {
7456: my ($symb,$courseid,$domain,$username)=@_;
7457: {
7458: use integer;
7459: # strings need to be an even # of cahracters long, it it is odd the
7460: # last characters gets thrown away
7461: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7462: my $symbseed=numval($symb) << 10;
7463: my $namechck=unpack("%32S*",$username.' ');
7464:
7465: my $nameseed=numval($username) << 21;
7466: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7467: my $courseseed=unpack("%32S*",$courseid.' ');
7468:
7469: my $num1=$symbchck+$symbseed+$namechck;
7470: my $num2=$nameseed+$domainseed+$courseseed;
7471: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7472: #&logthis("rndseed :$num:$symb");
7473: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7474: return "$num1,$num2";
7475: }
7476: }
7477:
7478: sub rndseed_64bit3 {
7479: my ($symb,$courseid,$domain,$username)=@_;
7480: {
7481: use integer;
7482: # strings need to be an even # of cahracters long, it it is odd the
7483: # last characters gets thrown away
7484: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7485: my $symbseed=numval2($symb) << 10;
7486: my $namechck=unpack("%32S*",$username.' ');
7487:
7488: my $nameseed=numval2($username) << 21;
7489: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7490: my $courseseed=unpack("%32S*",$courseid.' ');
7491:
7492: my $num1=$symbchck+$symbseed+$namechck;
7493: my $num2=$nameseed+$domainseed+$courseseed;
7494: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7495: #&logthis("rndseed :$num1:$num2:$_64bit");
7496: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7497:
7498: return "$num1:$num2";
7499: }
7500: }
7501:
7502: sub rndseed_64bit4 {
7503: my ($symb,$courseid,$domain,$username)=@_;
7504: {
7505: use integer;
7506: # strings need to be an even # of cahracters long, it it is odd the
7507: # last characters gets thrown away
7508: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7509: my $symbseed=numval3($symb) << 10;
7510: my $namechck=unpack("%32S*",$username.' ');
7511:
7512: my $nameseed=numval3($username) << 21;
7513: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7514: my $courseseed=unpack("%32S*",$courseid.' ');
7515:
7516: my $num1=$symbchck+$symbseed+$namechck;
7517: my $num2=$nameseed+$domainseed+$courseseed;
7518: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7519: #&logthis("rndseed :$num1:$num2:$_64bit");
7520: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7521:
7522: return "$num1:$num2";
7523: }
7524: }
7525:
7526: sub rndseed_64bit5 {
7527: my ($symb,$courseid,$domain,$username)=@_;
7528: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
7529: return "$num1:$num2";
7530: }
7531:
7532: sub rndseed_CODE_64bit {
7533: my ($symb,$courseid,$domain,$username)=@_;
7534: {
7535: use integer;
7536: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7537: my $symbseed=numval2($symb);
7538: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7539: my $CODEseed=numval(&getCODE());
7540: my $courseseed=unpack("%32S*",$courseid.' ');
7541: my $num1=$symbseed+$CODEchck;
7542: my $num2=$CODEseed+$courseseed+$symbchck;
7543: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7544: #&logthis("rndseed :$num1:$num2:$symb");
7545: if ($_64bit) { $num1=(($num1<<32)>>32); }
7546: if ($_64bit) { $num2=(($num2<<32)>>32); }
7547: return "$num1:$num2";
7548: }
7549: }
7550:
7551: sub rndseed_CODE_64bit4 {
7552: my ($symb,$courseid,$domain,$username)=@_;
7553: {
7554: use integer;
7555: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7556: my $symbseed=numval3($symb);
7557: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7558: my $CODEseed=numval3(&getCODE());
7559: my $courseseed=unpack("%32S*",$courseid.' ');
7560: my $num1=$symbseed+$CODEchck;
7561: my $num2=$CODEseed+$courseseed+$symbchck;
7562: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7563: #&logthis("rndseed :$num1:$num2:$symb");
7564: if ($_64bit) { $num1=(($num1<<32)>>32); }
7565: if ($_64bit) { $num2=(($num2<<32)>>32); }
7566: return "$num1:$num2";
7567: }
7568: }
7569:
7570: sub rndseed_CODE_64bit5 {
7571: my ($symb,$courseid,$domain,$username)=@_;
7572: my $code = &getCODE();
7573: my ($num1,$num2)=&digest("$symb,$courseid,$code");
7574: return "$num1:$num2";
7575: }
7576:
7577: sub setup_random_from_rndseed {
7578: my ($rndseed)=@_;
7579: if ($rndseed =~/([,:])/) {
7580: my ($num1,$num2)=split(/[,:]/,$rndseed);
7581: &Math::Random::random_set_seed(abs($num1),abs($num2));
7582: } else {
7583: &Math::Random::random_set_seed_from_phrase($rndseed);
7584: }
7585: }
7586:
7587: sub latest_receipt_algorithm_id {
7588: return 'receipt3';
7589: }
7590:
7591: sub recunique {
7592: my $fucourseid=shift;
7593: my $unique;
7594: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
7595: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7596: $unique=$env{"course.$fucourseid.internal.encseed"};
7597: } else {
7598: $unique=$perlvar{'lonReceipt'};
7599: }
7600: return unpack("%32C*",$unique);
7601: }
7602:
7603: sub recprefix {
7604: my $fucourseid=shift;
7605: my $prefix;
7606: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2'||
7607: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7608: $prefix=$env{"course.$fucourseid.internal.encpref"};
7609: } else {
7610: $prefix=$perlvar{'lonHostID'};
7611: }
7612: return unpack("%32C*",$prefix);
7613: }
7614:
7615: sub ireceipt {
7616: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
7617:
7618: my $return =&recprefix($fucourseid).'-';
7619:
7620: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt3' ||
7621: $env{'request.state'} eq 'construct') {
7622: $return .= (&digest("$funame,$fudom,$fucourseid,$fusymb,$part")%10000);
7623: return $return;
7624: }
7625:
7626: my $cuname=unpack("%32C*",$funame);
7627: my $cudom=unpack("%32C*",$fudom);
7628: my $cucourseid=unpack("%32C*",$fucourseid);
7629: my $cusymb=unpack("%32C*",$fusymb);
7630: my $cunique=&recunique($fucourseid);
7631: my $cpart=unpack("%32S*",$part);
7632: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
7633:
7634: #&logthis("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname)." and ".($cpart%$cudom));
7635:
7636: $return.= ($cunique%$cuname+
7637: $cunique%$cudom+
7638: $cusymb%$cuname+
7639: $cusymb%$cudom+
7640: $cucourseid%$cuname+
7641: $cucourseid%$cudom+
7642: $cpart%$cuname+
7643: $cpart%$cudom);
7644: } else {
7645: $return.= ($cunique%$cuname+
7646: $cunique%$cudom+
7647: $cusymb%$cuname+
7648: $cusymb%$cudom+
7649: $cucourseid%$cuname+
7650: $cucourseid%$cudom);
7651: }
7652: return $return;
7653: }
7654:
7655: sub receipt {
7656: my ($part)=@_;
7657: my ($symb,$courseid,$domain,$name) = &whichuser();
7658: return &ireceipt($name,$domain,$courseid,$symb,$part);
7659: }
7660:
7661: sub whichuser {
7662: my ($passedsymb)=@_;
7663: my ($symb,$courseid,$domain,$name,$publicuser);
7664: if (defined($env{'form.grade_symb'})) {
7665: my ($tmp_courseid)=&get_env_multiple('form.grade_courseid');
7666: my $allowed=&allowed('vgr',$tmp_courseid);
7667: if (!$allowed &&
7668: exists($env{'request.course.sec'}) &&
7669: $env{'request.course.sec'} !~ /^\s*$/) {
7670: $allowed=&allowed('vgr',$tmp_courseid.
7671: '/'.$env{'request.course.sec'});
7672: }
7673: if ($allowed) {
7674: ($symb)=&get_env_multiple('form.grade_symb');
7675: $courseid=$tmp_courseid;
7676: ($domain)=&get_env_multiple('form.grade_domain');
7677: ($name)=&get_env_multiple('form.grade_username');
7678: return ($symb,$courseid,$domain,$name,$publicuser);
7679: }
7680: }
7681: if (!$passedsymb) {
7682: $symb=&symbread();
7683: } else {
7684: $symb=$passedsymb;
7685: }
7686: $courseid=$env{'request.course.id'};
7687: $domain=$env{'user.domain'};
7688: $name=$env{'user.name'};
7689: if ($name eq 'public' && $domain eq 'public') {
7690: if (!defined($env{'form.username'})) {
7691: $env{'form.username'}.=time.rand(10000000);
7692: }
7693: $name.=$env{'form.username'};
7694: }
7695: return ($symb,$courseid,$domain,$name,$publicuser);
7696:
7697: }
7698:
7699: # ------------------------------------------------------------ Serves up a file
7700: # returns either the contents of the file or
7701: # -1 if the file doesn't exist
7702: #
7703: # if the target is a file that was uploaded via DOCS,
7704: # a check will be made to see if a current copy exists on the local server,
7705: # if it does this will be served, otherwise a copy will be retrieved from
7706: # the home server for the course and stored in /home/httpd/html/userfiles on
7707: # the local server.
7708:
7709: sub getfile {
7710: my ($file) = @_;
7711: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7712: &repcopy($file);
7713: return &readfile($file);
7714: }
7715:
7716: sub repcopy_userfile {
7717: my ($file)=@_;
7718: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7719: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
7720: my ($cdom,$cnum,$filename) =
7721: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+($match_domain)/+($match_name)/+(.*)|);
7722: my $uri="/uploaded/$cdom/$cnum/$filename";
7723: if (-e "$file") {
7724: # we already have a local copy, check it out
7725: my @fileinfo = stat($file);
7726: my $rtncode;
7727: my $info;
7728: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
7729: if ($lwpresp ne 'ok') {
7730: # there is no such file anymore, even though we had a local copy
7731: if ($rtncode eq '404') {
7732: unlink($file);
7733: }
7734: return -1;
7735: }
7736: if ($info < $fileinfo[9]) {
7737: # nice, the file we have is up-to-date, just say okay
7738: return 'ok';
7739: } else {
7740: # the file is outdated, get rid of it
7741: unlink($file);
7742: }
7743: }
7744: # one way or the other, at this point, we don't have the file
7745: # construct the correct path for the file
7746: my @parts = ($cdom,$cnum);
7747: if ($filename =~ m|^(.+)/[^/]+$|) {
7748: push @parts, split(/\//,$1);
7749: }
7750: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
7751: foreach my $part (@parts) {
7752: $path .= '/'.$part;
7753: if (!-e $path) {
7754: mkdir($path,0770);
7755: }
7756: }
7757: # now the path exists for sure
7758: # get a user agent
7759: my $ua=new LWP::UserAgent;
7760: my $transferfile=$file.'.in.transfer';
7761: # FIXME: this should flock
7762: if (-e $transferfile) { return 'ok'; }
7763: my $request;
7764: $uri=~s/^\///;
7765: $request=new HTTP::Request('GET','http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri);
7766: my $response=$ua->request($request,$transferfile);
7767: # did it work?
7768: if ($response->is_error()) {
7769: unlink($transferfile);
7770: &logthis("Userfile repcopy failed for $uri");
7771: return -1;
7772: }
7773: # worked, rename the transfer file
7774: rename($transferfile,$file);
7775: return 'ok';
7776: }
7777:
7778: sub tokenwrapper {
7779: my $uri=shift;
7780: $uri=~s|^http\://([^/]+)||;
7781: $uri=~s|^/||;
7782: $env{'user.environment'}=~/\/([^\/]+)\.id/;
7783: my $token=$1;
7784: my (undef,$udom,$uname,$file)=split('/',$uri,4);
7785: if ($udom && $uname && $file) {
7786: $file=~s|(\?\.*)*$||;
7787: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
7788: return 'http://'.&hostname(&homeserver($uname,$udom)).'/'.$uri.
7789: (($uri=~/\?/)?'&':'?').'token='.$token.
7790: '&tokenissued='.$perlvar{'lonHostID'};
7791: } else {
7792: return '/adm/notfound.html';
7793: }
7794: }
7795:
7796: # call with reqtype HEAD: get last modification time
7797: # call with reqtype GET: get the file contents
7798: # Do not call this with reqtype GET for large files! It loads everything into memory
7799: #
7800: sub getuploaded {
7801: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
7802: $uri=~s/^\///;
7803: $uri = 'http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri;
7804: my $ua=new LWP::UserAgent;
7805: my $request=new HTTP::Request($reqtype,$uri);
7806: my $response=$ua->request($request);
7807: $$rtncode = $response->code;
7808: if (! $response->is_success()) {
7809: return 'failed';
7810: }
7811: if ($reqtype eq 'HEAD') {
7812: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
7813: } elsif ($reqtype eq 'GET') {
7814: $$info = $response->content;
7815: }
7816: return 'ok';
7817: }
7818:
7819: sub readfile {
7820: my $file = shift;
7821: if ( (! -e $file ) || ($file eq '') ) { return -1; };
7822: my $fh;
7823: open($fh,"<$file");
7824: my $a='';
7825: while (my $line = <$fh>) { $a .= $line; }
7826: return $a;
7827: }
7828:
7829: sub filelocation {
7830: my ($dir,$file) = @_;
7831: my $location;
7832: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
7833:
7834: if ($file =~ m-^/adm/-) {
7835: $file=~s-^/adm/wrapper/-/-;
7836: $file=~s-^/adm/coursedocs/showdoc/-/-;
7837: }
7838:
7839: if ($file=~m:^/~:) { # is a contruction space reference
7840: $location = $file;
7841: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
7842: } elsif ($file=~m{^/home/$match_username/public_html/}) {
7843: # is a correct contruction space reference
7844: $location = $file;
7845: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
7846: my ($udom,$uname,$filename)=
7847: ($file=~m -^/+(?:uploaded|editupload)/+($match_domain)/+($match_name)/+(.*)$-);
7848: my $home=&homeserver($uname,$udom);
7849: my $is_me=0;
7850: my @ids=¤t_machine_ids();
7851: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
7852: if ($is_me) {
7853: $location=&propath($udom,$uname).
7854: '/userfiles/'.$filename;
7855: } else {
7856: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
7857: $udom.'/'.$uname.'/'.$filename;
7858: }
7859: } elsif ($file =~ m-^/adm/-) {
7860: $location = $perlvar{'lonDocRoot'}.'/'.$file;
7861: } else {
7862: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7863: $file=~s:^/res/:/:;
7864: if ( !( $file =~ m:^/:) ) {
7865: $location = $dir. '/'.$file;
7866: } else {
7867: $location = '/home/httpd/html/res'.$file;
7868: }
7869: }
7870: $location=~s://+:/:g; # remove duplicate /
7871: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
7872: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
7873: return $location;
7874: }
7875:
7876: sub hreflocation {
7877: my ($dir,$file)=@_;
7878: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
7879: $file=filelocation($dir,$file);
7880: } elsif ($file=~m-^/adm/-) {
7881: $file=~s-^/adm/wrapper/-/-;
7882: $file=~s-^/adm/coursedocs/showdoc/-/-;
7883: }
7884: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
7885: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
7886: } elsif ($file=~m-/home/($match_username)/public_html/-) {
7887: $file=~s-^/home/($match_username)/public_html/-/~$1/-;
7888: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
7889: $file=~s-^/home/httpd/lonUsers/($match_domain)/./././($match_name)/userfiles/
7890: -/uploaded/$1/$2/-x;
7891: }
7892: if ($file=~ m{^/userfiles/}) {
7893: $file =~ s{^/userfiles/}{/uploaded/};
7894: }
7895: return $file;
7896: }
7897:
7898: sub current_machine_domains {
7899: return &machine_domains(&hostname($perlvar{'lonHostID'}));
7900: }
7901:
7902: sub machine_domains {
7903: my ($hostname) = @_;
7904: my @domains;
7905: my %hostname = &all_hostnames();
7906: while( my($id, $name) = each(%hostname)) {
7907: # &logthis("-$id-$name-$hostname-");
7908: if ($hostname eq $name) {
7909: push(@domains,&host_domain($id));
7910: }
7911: }
7912: return @domains;
7913: }
7914:
7915: sub current_machine_ids {
7916: return &machine_ids(&hostname($perlvar{'lonHostID'}));
7917: }
7918:
7919: sub machine_ids {
7920: my ($hostname) = @_;
7921: $hostname ||= &hostname($perlvar{'lonHostID'});
7922: my @ids;
7923: my %name_to_host = &all_names();
7924: if (ref($name_to_host{$hostname}) eq 'ARRAY') {
7925: return @{ $name_to_host{$hostname} };
7926: }
7927: return;
7928: }
7929:
7930: sub additional_machine_domains {
7931: my @domains;
7932: open(my $fh,"<$perlvar{'lonTabDir'}/expected_domains.tab");
7933: while( my $line = <$fh>) {
7934: $line =~ s/\s//g;
7935: push(@domains,$line);
7936: }
7937: return @domains;
7938: }
7939:
7940: sub default_login_domain {
7941: my $domain = $perlvar{'lonDefDomain'};
7942: my $testdomain=(split(/\./,$ENV{'HTTP_HOST'}))[0];
7943: foreach my $posdom (¤t_machine_domains(),
7944: &additional_machine_domains()) {
7945: if (lc($posdom) eq lc($testdomain)) {
7946: $domain=$posdom;
7947: last;
7948: }
7949: }
7950: return $domain;
7951: }
7952:
7953: # ------------------------------------------------------------- Declutters URLs
7954:
7955: sub declutter {
7956: my $thisfn=shift;
7957: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7958: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7959: $thisfn=~s/^\///;
7960: $thisfn=~s|^adm/wrapper/||;
7961: $thisfn=~s|^adm/coursedocs/showdoc/||;
7962: $thisfn=~s/^res\///;
7963: $thisfn=~s/\?.+$//;
7964: return $thisfn;
7965: }
7966:
7967: # ------------------------------------------------------------- Clutter up URLs
7968:
7969: sub clutter {
7970: my $thisfn='/'.&declutter(shift);
7971: if ($thisfn !~ m{^/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)/}
7972: || $thisfn =~ m{^/adm/(includes|pages)} ) {
7973: $thisfn='/res'.$thisfn;
7974: }
7975: if ($thisfn !~m|/adm|) {
7976: if ($thisfn =~ m|/ext/|) {
7977: $thisfn='/adm/wrapper'.$thisfn;
7978: } else {
7979: my ($ext) = ($thisfn =~ /\.(\w+)$/);
7980: my $embstyle=&Apache::loncommon::fileembstyle($ext);
7981: if ($embstyle eq 'ssi'
7982: || ($embstyle eq 'hdn')
7983: || ($embstyle eq 'rat')
7984: || ($embstyle eq 'prv')
7985: || ($embstyle eq 'ign')) {
7986: #do nothing with these
7987: } elsif (($embstyle eq 'img')
7988: || ($embstyle eq 'emb')
7989: || ($embstyle eq 'wrp')) {
7990: $thisfn='/adm/wrapper'.$thisfn;
7991: } elsif ($embstyle eq 'unk'
7992: && $thisfn!~/\.(sequence|page)$/) {
7993: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
7994: } else {
7995: # &logthis("Got a blank emb style");
7996: }
7997: }
7998: }
7999: return $thisfn;
8000: }
8001:
8002: sub clutter_with_no_wrapper {
8003: my $uri = &clutter(shift);
8004: if ($uri =~ m-^/adm/-) {
8005: $uri =~ s-^/adm/wrapper/-/-;
8006: $uri =~ s-^/adm/coursedocs/showdoc/-/-;
8007: }
8008: return $uri;
8009: }
8010:
8011: sub freeze_escape {
8012: my ($value)=@_;
8013: if (ref($value)) {
8014: $value=&nfreeze($value);
8015: return '__FROZEN__'.&escape($value);
8016: }
8017: return &escape($value);
8018: }
8019:
8020:
8021: sub thaw_unescape {
8022: my ($value)=@_;
8023: if ($value =~ /^__FROZEN__/) {
8024: substr($value,0,10,undef);
8025: $value=&unescape($value);
8026: return &thaw($value);
8027: }
8028: return &unescape($value);
8029: }
8030:
8031: sub correct_line_ends {
8032: my ($result)=@_;
8033: $$result =~s/\r\n/\n/mg;
8034: $$result =~s/\r/\n/mg;
8035: }
8036: # ================================================================ Main Program
8037:
8038: sub goodbye {
8039: &logthis("Starting Shut down");
8040: #not converted to using infrastruture and probably shouldn't be
8041: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&nfreeze(\%badServerCache))));
8042: #converted
8043: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
8044: &logthis(sprintf("%-20s is %s",'%homecache',length(&nfreeze(\%homecache))));
8045: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&nfreeze(\%titlecache))));
8046: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&nfreeze(\%courseresdatacache))));
8047: #1.1 only
8048: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&nfreeze(\%userresdatacache))));
8049: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&nfreeze(\%getsectioncache))));
8050: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&nfreeze(\%courseresversioncache))));
8051: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&nfreeze(\%resversioncache))));
8052: &logthis(sprintf("%-20s is %s",'%remembered',length(&nfreeze(\%remembered))));
8053: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
8054: &logthis(sprintf("%-20s is %s",'hits',$hits));
8055: &flushcourselogs();
8056: &logthis("Shutting down");
8057: }
8058:
8059: sub get_dns {
8060: my ($url,$func,$ignore_cache) = @_;
8061: if (!$ignore_cache) {
8062: my ($content,$cached)=
8063: &Apache::lonnet::is_cached_new('dns',$url);
8064: if ($cached) {
8065: &$func($content);
8066: return;
8067: }
8068: }
8069:
8070: my %alldns;
8071: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
8072: foreach my $dns (<$config>) {
8073: next if ($dns !~ /^\^(\S*)/x);
8074: $alldns{$1} = 1;
8075: }
8076: while (%alldns) {
8077: my ($dns) = keys(%alldns);
8078: delete($alldns{$dns});
8079: my $ua=new LWP::UserAgent;
8080: my $request=new HTTP::Request('GET',"http://$dns$url");
8081: my $response=$ua->request($request);
8082: next if ($response->is_error());
8083: my @content = split("\n",$response->content);
8084: &Apache::lonnet::do_cache_new('dns',$url,\@content,30*24*60*60);
8085: &$func(\@content);
8086: return;
8087: }
8088: close($config);
8089: my $which = (split('/',$url))[3];
8090: &logthis("unable to contact DNS defaulting to on disk file dns_$which.tab\n");
8091: open($config,"<$perlvar{'lonTabDir'}/dns_$which.tab");
8092: my @content = <$config>;
8093: &$func(\@content);
8094: return;
8095: }
8096: # ------------------------------------------------------------ Read domain file
8097: {
8098: my $loaded;
8099: my %domain;
8100:
8101: sub parse_domain_tab {
8102: my ($lines) = @_;
8103: foreach my $line (@$lines) {
8104: next if ($line =~ /^(\#|\s*$ )/x);
8105:
8106: chomp($line);
8107: my ($name,@elements) = split(/:/,$line,9);
8108: my %this_domain;
8109: foreach my $field ('description', 'auth_def', 'auth_arg_def',
8110: 'lang_def', 'city', 'longi', 'lati',
8111: 'primary') {
8112: $this_domain{$field} = shift(@elements);
8113: }
8114: $domain{$name} = \%this_domain;
8115: }
8116: }
8117:
8118: sub reset_domain_info {
8119: undef($loaded);
8120: undef(%domain);
8121: }
8122:
8123: sub load_domain_tab {
8124: my ($ignore_cache) = @_;
8125: &get_dns('/adm/dns/domain',\&parse_domain_tab,$ignore_cache);
8126: my $fh;
8127: if (open($fh,"<".$perlvar{'lonTabDir'}.'/domain.tab')) {
8128: my @lines = <$fh>;
8129: &parse_domain_tab(\@lines);
8130: }
8131: close($fh);
8132: $loaded = 1;
8133: }
8134:
8135: sub domain {
8136: &load_domain_tab() if (!$loaded);
8137:
8138: my ($name,$what) = @_;
8139: return if ( !exists($domain{$name}) );
8140:
8141: if (!$what) {
8142: return $domain{$name}{'description'};
8143: }
8144: return $domain{$name}{$what};
8145: }
8146: }
8147:
8148:
8149: # ------------------------------------------------------------- Read hosts file
8150: {
8151: my %hostname;
8152: my %hostdom;
8153: my %libserv;
8154: my $loaded;
8155: my %name_to_host;
8156:
8157: sub parse_hosts_tab {
8158: my ($file) = @_;
8159: foreach my $configline (@$file) {
8160: next if ($configline =~ /^(\#|\s*$ )/x);
8161: next if ($configline =~ /^\^/);
8162: chomp($configline);
8163: my ($id,$domain,$role,$name)=split(/:/,$configline);
8164: $name=~s/\s//g;
8165: if ($id && $domain && $role && $name) {
8166: $hostname{$id}=$name;
8167: push(@{$name_to_host{$name}}, $id);
8168: $hostdom{$id}=$domain;
8169: if ($role eq 'library') { $libserv{$id}=$name; }
8170: }
8171: }
8172: }
8173:
8174: sub reset_hosts_info {
8175: &purge_remembered();
8176: &reset_domain_info();
8177: &reset_hosts_ip_info();
8178: undef(%name_to_host);
8179: undef(%hostname);
8180: undef(%hostdom);
8181: undef(%libserv);
8182: undef($loaded);
8183: }
8184:
8185: sub load_hosts_tab {
8186: my ($ignore_cache) = @_;
8187: &get_dns('/adm/dns/hosts',\&parse_hosts_tab,$ignore_cache);
8188: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
8189: my @config = <$config>;
8190: &parse_hosts_tab(\@config);
8191: close($config);
8192: $loaded=1;
8193: }
8194:
8195: sub hostname {
8196: &load_hosts_tab() if (!$loaded);
8197:
8198: my ($lonid) = @_;
8199: return $hostname{$lonid};
8200: }
8201:
8202: sub all_hostnames {
8203: &load_hosts_tab() if (!$loaded);
8204:
8205: return %hostname;
8206: }
8207:
8208: sub all_names {
8209: &load_hosts_tab() if (!$loaded);
8210:
8211: return %name_to_host;
8212: }
8213:
8214: sub is_library {
8215: &load_hosts_tab() if (!$loaded);
8216:
8217: return exists($libserv{$_[0]});
8218: }
8219:
8220: sub all_library {
8221: &load_hosts_tab() if (!$loaded);
8222:
8223: return %libserv;
8224: }
8225:
8226: sub get_servers {
8227: &load_hosts_tab() if (!$loaded);
8228:
8229: my ($domain,$type) = @_;
8230: my %possible_hosts = ($type eq 'library') ? %libserv
8231: : %hostname;
8232: my %result;
8233: if (ref($domain) eq 'ARRAY') {
8234: while ( my ($host,$hostname) = each(%possible_hosts)) {
8235: if (grep(/^\Q$hostdom{$host}\E$/,@$domain)) {
8236: $result{$host} = $hostname;
8237: }
8238: }
8239: } else {
8240: while ( my ($host,$hostname) = each(%possible_hosts)) {
8241: if ($hostdom{$host} eq $domain) {
8242: $result{$host} = $hostname;
8243: }
8244: }
8245: }
8246: return %result;
8247: }
8248:
8249: sub host_domain {
8250: &load_hosts_tab() if (!$loaded);
8251:
8252: my ($lonid) = @_;
8253: return $hostdom{$lonid};
8254: }
8255:
8256: sub all_domains {
8257: &load_hosts_tab() if (!$loaded);
8258:
8259: my %seen;
8260: my @uniq = grep(!$seen{$_}++, values(%hostdom));
8261: return @uniq;
8262: }
8263: }
8264:
8265: {
8266: my %iphost;
8267: my %name_to_ip;
8268: my %lonid_to_ip;
8269:
8270: sub get_hosts_from_ip {
8271: my ($ip) = @_;
8272: my %iphosts = &get_iphost();
8273: if (ref($iphosts{$ip})) {
8274: return @{$iphosts{$ip}};
8275: }
8276: return;
8277: }
8278:
8279: sub reset_hosts_ip_info {
8280: undef(%iphost);
8281: undef(%name_to_ip);
8282: undef(%lonid_to_ip);
8283: }
8284:
8285: sub get_host_ip {
8286: my ($lonid) = @_;
8287: if (exists($lonid_to_ip{$lonid})) {
8288: return $lonid_to_ip{$lonid};
8289: }
8290: my $name=&hostname($lonid);
8291: my $ip = gethostbyname($name);
8292: return if (!$ip || length($ip) ne 4);
8293: $ip=inet_ntoa($ip);
8294: $name_to_ip{$name} = $ip;
8295: $lonid_to_ip{$lonid} = $ip;
8296: return $ip;
8297: }
8298:
8299: sub get_iphost {
8300: my ($ignore_cache) = @_;
8301:
8302: if (!$ignore_cache) {
8303: if (%iphost) {
8304: return %iphost;
8305: }
8306: my ($ip_info,$cached)=
8307: &Apache::lonnet::is_cached_new('iphost','iphost');
8308: if ($cached) {
8309: %iphost = %{$ip_info->[0]};
8310: %name_to_ip = %{$ip_info->[1]};
8311: %lonid_to_ip = %{$ip_info->[2]};
8312: return %iphost;
8313: }
8314: }
8315:
8316: # get yesterday's info for fallback
8317: my %old_name_to_ip;
8318: my ($ip_info,$cached)=
8319: &Apache::lonnet::is_cached_new('iphost','iphost');
8320: if ($cached) {
8321: %old_name_to_ip = %{$ip_info->[1]};
8322: }
8323:
8324: my %name_to_host = &all_names();
8325: foreach my $name (keys(%name_to_host)) {
8326: my $ip;
8327: if (!exists($name_to_ip{$name})) {
8328: $ip = gethostbyname($name);
8329: if (!$ip || length($ip) ne 4) {
8330: if (defined($old_name_to_ip{$name})) {
8331: $ip = $old_name_to_ip{$name};
8332: &logthis("Can't find $name defaulting to old $ip");
8333: } else {
8334: &logthis("Name $name no IP found");
8335: next;
8336: }
8337: } else {
8338: $ip=inet_ntoa($ip);
8339: }
8340: $name_to_ip{$name} = $ip;
8341: } else {
8342: $ip = $name_to_ip{$name};
8343: }
8344: foreach my $id (@{ $name_to_host{$name} }) {
8345: $lonid_to_ip{$id} = $ip;
8346: }
8347: push(@{$iphost{$ip}},@{$name_to_host{$name}});
8348: }
8349: &Apache::lonnet::do_cache_new('iphost','iphost',
8350: [\%iphost,\%name_to_ip,\%lonid_to_ip],
8351: 48*60*60);
8352:
8353: return %iphost;
8354: }
8355: }
8356:
8357: BEGIN {
8358:
8359: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
8360: unless ($readit) {
8361: {
8362: my $configvars = LONCAPA::Configuration::read_conf('loncapa.conf');
8363: %perlvar = (%perlvar,%{$configvars});
8364: }
8365:
8366:
8367: # ------------------------------------------------------ Read spare server file
8368: {
8369: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
8370:
8371: while (my $configline=<$config>) {
8372: chomp($configline);
8373: if ($configline) {
8374: my ($host,$type) = split(':',$configline,2);
8375: if (!defined($type) || $type eq '') { $type = 'default' };
8376: push(@{ $spareid{$type} }, $host);
8377: }
8378: }
8379: close($config);
8380: }
8381: # ------------------------------------------------------------ Read permissions
8382: {
8383: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
8384:
8385: while (my $configline=<$config>) {
8386: chomp($configline);
8387: if ($configline) {
8388: my ($role,$perm)=split(/ /,$configline);
8389: if ($perm ne '') { $pr{$role}=$perm; }
8390: }
8391: }
8392: close($config);
8393: }
8394:
8395: # -------------------------------------------- Read plain texts for permissions
8396: {
8397: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
8398:
8399: while (my $configline=<$config>) {
8400: chomp($configline);
8401: if ($configline) {
8402: my ($short,@plain)=split(/:/,$configline);
8403: %{$prp{$short}} = ();
8404: if (@plain > 0) {
8405: $prp{$short}{'std'} = $plain[0];
8406: for (my $i=1; $i<@plain; $i++) {
8407: $prp{$short}{'alt'.$i} = $plain[$i];
8408: }
8409: }
8410: }
8411: }
8412: close($config);
8413: }
8414:
8415: # ---------------------------------------------------------- Read package table
8416: {
8417: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
8418:
8419: while (my $configline=<$config>) {
8420: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
8421: chomp($configline);
8422: my ($short,$plain)=split(/:/,$configline);
8423: my ($pack,$name)=split(/\&/,$short);
8424: if ($plain ne '') {
8425: $packagetab{$pack.'&'.$name.'&name'}=$name;
8426: $packagetab{$short}=$plain;
8427: }
8428: }
8429: close($config);
8430: }
8431:
8432: # ------------- set up temporary directory
8433: {
8434: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
8435:
8436: }
8437:
8438: $memcache=new Cache::Memcached({'servers' => ['127.0.0.1:11211'],
8439: 'compress_threshold'=> 20_000,
8440: });
8441:
8442: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
8443: $dumpcount=0;
8444:
8445: &logtouch();
8446: &logthis('<font color="yellow">INFO: Read configuration</font>');
8447: $readit=1;
8448: {
8449: use integer;
8450: my $test=(2**32)+1;
8451: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
8452: &logthis(" Detected 64bit platform ($_64bit)");
8453: }
8454: }
8455: }
8456:
8457: 1;
8458: __END__
8459:
8460: =pod
8461:
8462: =head1 NAME
8463:
8464: Apache::lonnet - Subroutines to ask questions about things in the network.
8465:
8466: =head1 SYNOPSIS
8467:
8468: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
8469:
8470: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
8471:
8472: Common parameters:
8473:
8474: =over 4
8475:
8476: =item *
8477:
8478: $uname : an internal username (if $cname expecting a course Id specifically)
8479:
8480: =item *
8481:
8482: $udom : a domain (if $cdom expecting a course's domain specifically)
8483:
8484: =item *
8485:
8486: $symb : a resource instance identifier
8487:
8488: =item *
8489:
8490: $namespace : the name of a .db file that contains the data needed or
8491: being set.
8492:
8493: =back
8494:
8495: =head1 OVERVIEW
8496:
8497: lonnet provides subroutines which interact with the
8498: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
8499: about classes, users, and resources.
8500:
8501: For many of these objects you can also use this to store data about
8502: them or modify them in various ways.
8503:
8504: =head2 Symbs
8505:
8506: To identify a specific instance of a resource, LON-CAPA uses symbols
8507: or "symbs"X<symb>. These identifiers are built from the URL of the
8508: map, the resource number of the resource in the map, and the URL of
8509: the resource itself. The latter is somewhat redundant, but might help
8510: if maps change.
8511:
8512: An example is
8513:
8514: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
8515:
8516: The respective map entry is
8517:
8518: <resource id="19" src="/res/msu/korte/tests/part12.problem"
8519: title="Problem 2">
8520: </resource>
8521:
8522: Symbs are used by the random number generator, as well as to store and
8523: restore data specific to a certain instance of for example a problem.
8524:
8525: =head2 Storing And Retrieving Data
8526:
8527: X<store()>X<cstore()>X<restore()>Three of the most important functions
8528: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
8529: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
8530: is is the non-critical message twin of cstore. These functions are for
8531: handlers to store a perl hash to a user's permanent data space in an
8532: easy manner, and to retrieve it again on another call. It is expected
8533: that a handler would use this once at the beginning to retrieve data,
8534: and then again once at the end to send only the new data back.
8535:
8536: The data is stored in the user's data directory on the user's
8537: homeserver under the ID of the course.
8538:
8539: The hash that is returned by restore will have all of the previous
8540: value for all of the elements of the hash.
8541:
8542: Example:
8543:
8544: #creating a hash
8545: my %hash;
8546: $hash{'foo'}='bar';
8547:
8548: #storing it
8549: &Apache::lonnet::cstore(\%hash);
8550:
8551: #changing a value
8552: $hash{'foo'}='notbar';
8553:
8554: #adding a new value
8555: $hash{'bar'}='foo';
8556: &Apache::lonnet::cstore(\%hash);
8557:
8558: #retrieving the hash
8559: my %history=&Apache::lonnet::restore();
8560:
8561: #print the hash
8562: foreach my $key (sort(keys(%history))) {
8563: print("\%history{$key} = $history{$key}");
8564: }
8565:
8566: Will print out:
8567:
8568: %history{1:foo} = bar
8569: %history{1:keys} = foo:timestamp
8570: %history{1:timestamp} = 990455579
8571: %history{2:bar} = foo
8572: %history{2:foo} = notbar
8573: %history{2:keys} = foo:bar:timestamp
8574: %history{2:timestamp} = 990455580
8575: %history{bar} = foo
8576: %history{foo} = notbar
8577: %history{timestamp} = 990455580
8578: %history{version} = 2
8579:
8580: Note that the special hash entries C<keys>, C<version> and
8581: C<timestamp> were added to the hash. C<version> will be equal to the
8582: total number of versions of the data that have been stored. The
8583: C<timestamp> attribute will be the UNIX time the hash was
8584: stored. C<keys> is available in every historical section to list which
8585: keys were added or changed at a specific historical revision of a
8586: hash.
8587:
8588: B<Warning>: do not store the hash that restore returns directly. This
8589: will cause a mess since it will restore the historical keys as if the
8590: were new keys. I.E. 1:foo will become 1:1:foo etc.
8591:
8592: Calling convention:
8593:
8594: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
8595: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
8596:
8597: For more detailed information, see lonnet specific documentation.
8598:
8599: =head1 RETURN MESSAGES
8600:
8601: =over 4
8602:
8603: =item * B<con_lost>: unable to contact remote host
8604:
8605: =item * B<con_delayed>: unable to contact remote host, message will be delivered
8606: when the connection is brought back up
8607:
8608: =item * B<con_failed>: unable to contact remote host and unable to save message
8609: for later delivery
8610:
8611: =item * B<error:>: an error a occured, a description of the error follows the :
8612:
8613: =item * B<no_such_host>: unable to fund a host associated with the user/domain
8614: that was requested
8615:
8616: =back
8617:
8618: =head1 PUBLIC SUBROUTINES
8619:
8620: =head2 Session Environment Functions
8621:
8622: =over 4
8623:
8624: =item *
8625: X<appenv()>
8626: B<appenv(%hash)>: the value of %hash is written to
8627: the user envirnoment file, and will be restored for each access this
8628: user makes during this session, also modifies the %env for the current
8629: process
8630:
8631: =item *
8632: X<delenv()>
8633: B<delenv($regexp)>: removes all items from the session
8634: environment file that matches the regular expression in $regexp. The
8635: values are also delted from the current processes %env.
8636:
8637: =item * get_env_multiple($name)
8638:
8639: gets $name from the %env hash, it seemlessly handles the cases where multiple
8640: values may be defined and end up as an array ref.
8641:
8642: returns an array of values
8643:
8644: =back
8645:
8646: =head2 User Information
8647:
8648: =over 4
8649:
8650: =item *
8651: X<queryauthenticate()>
8652: B<queryauthenticate($uname,$udom)>: try to determine user's current
8653: authentication scheme
8654:
8655: =item *
8656: X<authenticate()>
8657: B<authenticate($uname,$upass,$udom)>: try to
8658: authenticate user from domain's lib servers (first use the current
8659: one). C<$upass> should be the users password.
8660:
8661: =item *
8662: X<homeserver()>
8663: B<homeserver($uname,$udom)>: find the server which has
8664: the user's directory and files (there must be only one), this caches
8665: the answer, and also caches if there is a borken connection.
8666:
8667: =item *
8668: X<idget()>
8669: B<idget($udom,@ids)>: find the usernames behind a list of IDs
8670: (IDs are a unique resource in a domain, there must be only 1 ID per
8671: username, and only 1 username per ID in a specific domain) (returns
8672: hash: id=>name,id=>name)
8673:
8674: =item *
8675: X<idrget()>
8676: B<idrget($udom,@unames)>: find the IDs behind a list of
8677: usernames (returns hash: name=>id,name=>id)
8678:
8679: =item *
8680: X<idput()>
8681: B<idput($udom,%ids)>: store away a list of names and associated IDs
8682:
8683: =item *
8684: X<rolesinit()>
8685: B<rolesinit($udom,$username,$authhost)>: get user privileges
8686:
8687: =item *
8688: X<getsection()>
8689: B<getsection($udom,$uname,$cname)>: finds the section of student in the
8690: course $cname, return section name/number or '' for "not in course"
8691: and '-1' for "no section"
8692:
8693: =item *
8694: X<userenvironment()>
8695: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
8696: passed in @what from the requested user's environment, returns a hash
8697:
8698: =item *
8699: X<userlog_query()>
8700: B<userlog_query($uname,$udom,%filters)>: retrieves data from a user's
8701: activity.log file. %filters defines filters applied when parsing the
8702: log file. These can be start or end timestamps, or the type of action
8703: - log to look for Login or Logout events, check for Checkin or
8704: Checkout, role for role selection. The response is in the form
8705: timestamp1:hostid1:event1×tamp2:hostid2:event2 where events are
8706: escaped strings of the action recorded in the activity.log file.
8707:
8708: =back
8709:
8710: =head2 User Roles
8711:
8712: =over 4
8713:
8714: =item *
8715:
8716: allowed($priv,$uri,$symb,$role) : check for a user privilege; returns codes for allowed actions
8717: F: full access
8718: U,I,K: authentication modes (cxx only)
8719: '': forbidden
8720: 1: user needs to choose course
8721: 2: browse allowed
8722: A: passphrase authentication needed
8723:
8724: =item *
8725:
8726: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
8727: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
8728: and course level
8729:
8730: =item *
8731:
8732: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
8733: explanation of a user role term
8734:
8735: =item *
8736:
8737: get_my_roles($uname,$udom,$context,$types,$roles,$roledoms) :
8738: All arguments are optional. Returns a hash of a roles, either for
8739: co-author/assistant author roles for a user's Construction Space
8740: (default), or if $context is 'userroles', roles for the user himself,
8741: In the hash, keys are set to colon-sparated $uname,$udom,and $role,
8742: and value is set to colon-separated start and end times for the role.
8743: If no username and domain are specified, will default to current
8744: user/domain. Types, roles, and roledoms are references to arrays,
8745: of role statuses (active, future or previous), roles
8746: (e.g., cc,in, st etc.) and domains of the roles which can be used
8747: to restrict the list of roles reported. If no array ref is
8748: provided for types, will default to return only active roles.
8749:
8750: =back
8751:
8752: =head2 User Modification
8753:
8754: =over 4
8755:
8756: =item *
8757:
8758: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
8759: user for the level given by URL. Optional start and end dates (leave empty
8760: string or zero for "no date")
8761:
8762: =item *
8763:
8764: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
8765: change a users, password, possible return values are: ok,
8766: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
8767: refused
8768:
8769: =item *
8770:
8771: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
8772:
8773: =item *
8774:
8775: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
8776: modify user
8777:
8778: =item *
8779:
8780: modifystudent
8781:
8782: modify a students enrollment and identification information.
8783: The course id is resolved based on the current users environment.
8784: This means the envoking user must be a course coordinator or otherwise
8785: associated with a course.
8786:
8787: This call is essentially a wrapper for lonnet::modifyuser and
8788: lonnet::modify_student_enrollment
8789:
8790: Inputs:
8791:
8792: =over 4
8793:
8794: =item B<$udom> Students loncapa domain
8795:
8796: =item B<$uname> Students loncapa login name
8797:
8798: =item B<$uid> Students id/student number
8799:
8800: =item B<$umode> Students authentication mode
8801:
8802: =item B<$upass> Students password
8803:
8804: =item B<$first> Students first name
8805:
8806: =item B<$middle> Students middle name
8807:
8808: =item B<$last> Students last name
8809:
8810: =item B<$gene> Students generation
8811:
8812: =item B<$usec> Students section in course
8813:
8814: =item B<$end> Unix time of the roles expiration
8815:
8816: =item B<$start> Unix time of the roles start date
8817:
8818: =item B<$forceid> If defined, allow $uid to be changed
8819:
8820: =item B<$desiredhome> server to use as home server for student
8821:
8822: =back
8823:
8824: =item *
8825:
8826: modify_student_enrollment
8827:
8828: Change a students enrollment status in a class. The environment variable
8829: 'role.request.course' must be defined for this function to proceed.
8830:
8831: Inputs:
8832:
8833: =over 4
8834:
8835: =item $udom, students domain
8836:
8837: =item $uname, students name
8838:
8839: =item $uid, students user id
8840:
8841: =item $first, students first name
8842:
8843: =item $middle
8844:
8845: =item $last
8846:
8847: =item $gene
8848:
8849: =item $usec
8850:
8851: =item $end
8852:
8853: =item $start
8854:
8855: =back
8856:
8857:
8858: =item *
8859:
8860: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
8861: custom role; give a custom role to a user for the level given by URL. Specify
8862: name and domain of role author, and role name
8863:
8864: =item *
8865:
8866: revokerole($udom,$uname,$url,$role) : revoke a role for url
8867:
8868: =item *
8869:
8870: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
8871:
8872: =back
8873:
8874: =head2 Course Infomation
8875:
8876: =over 4
8877:
8878: =item *
8879:
8880: coursedescription($courseid) : returns a hash of information about the
8881: specified course id, including all environment settings for the
8882: course, the description of the course will be in the hash under the
8883: key 'description'
8884:
8885: =item *
8886:
8887: resdata($name,$domain,$type,@which) : request for current parameter
8888: setting for a specific $type, where $type is either 'course' or 'user',
8889: @what should be a list of parameters to ask about. This routine caches
8890: answers for 5 minutes.
8891:
8892: =item *
8893:
8894: get_courseresdata($courseid, $domain) : dump the entire course resource
8895: data base, returning a hash that is keyed by the resource name and has
8896: values that are the resource value. I believe that the timestamps and
8897: versions are also returned.
8898:
8899:
8900: =back
8901:
8902: =head2 Course Modification
8903:
8904: =over 4
8905:
8906: =item *
8907:
8908: writecoursepref($courseid,%prefs) : write preferences (environment
8909: database) for a course
8910:
8911: =item *
8912:
8913: createcourse($udom,$description,$url) : make/modify course
8914:
8915: =back
8916:
8917: =head2 Resource Subroutines
8918:
8919: =over 4
8920:
8921: =item *
8922:
8923: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
8924:
8925: =item *
8926:
8927: repcopy($filename) : subscribes to the requested file, and attempts to
8928: replicate from the owning library server, Might return
8929: 'unavailable', 'not_found', 'forbidden', 'ok', or
8930: 'bad_request', also attempts to grab the metadata for the
8931: resource. Expects the local filesystem pathname
8932: (/home/httpd/html/res/....)
8933:
8934: =back
8935:
8936: =head2 Resource Information
8937:
8938: =over 4
8939:
8940: =item *
8941:
8942: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
8943: a vairety of different possible values, $varname should be a request
8944: string, and the other parameters can be used to specify who and what
8945: one is asking about.
8946:
8947: Possible values for $varname are environment.lastname (or other item
8948: from the envirnment hash), user.name (or someother aspect about the
8949: user), resource.0.maxtries (or some other part and parameter of a
8950: resource)
8951:
8952: =item *
8953:
8954: directcondval($number) : get current value of a condition; reads from a state
8955: string
8956:
8957: =item *
8958:
8959: condval($condidx) : value of condition index based on state
8960:
8961: =item *
8962:
8963: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
8964: resource's metadata, $what should be either a specific key, or either
8965: 'keys' (to get a list of possible keys) or 'packages' to get a list of
8966: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
8967:
8968: this function automatically caches all requests
8969:
8970: =item *
8971:
8972: metadata_query($query,$custom,$customshow) : make a metadata query against the
8973: network of library servers; returns file handle of where SQL and regex results
8974: will be stored for query
8975:
8976: =item *
8977:
8978: symbread($filename) : return symbolic list entry (filename argument optional);
8979: returns the data handle
8980:
8981: =item *
8982:
8983: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
8984: a possible symb for the URL in $thisfn, and if is an encryypted
8985: resource that the user accessed using /enc/ returns a 1 on success, 0
8986: on failure, user must be in a course, as it assumes the existance of
8987: the course initial hash, and uses $env('request.course.id'}
8988:
8989:
8990: =item *
8991:
8992: symbclean($symb) : removes versions numbers from a symb, returns the
8993: cleaned symb
8994:
8995: =item *
8996:
8997: is_on_map($uri) : checks if the $uri is somewhere on the current
8998: course map, user must be in a course for it to work.
8999:
9000: =item *
9001:
9002: numval($salt) : return random seed value (addend for rndseed)
9003:
9004: =item *
9005:
9006: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
9007: a random seed, all arguments are optional, if they aren't sent it uses the
9008: environment to derive them. Note: if symb isn't sent and it can't get one
9009: from &symbread it will use the current time as its return value
9010:
9011: =item *
9012:
9013: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
9014: unfakeable, receipt
9015:
9016: =item *
9017:
9018: receipt() : API to ireceipt working off of env values; given out to users
9019:
9020: =item *
9021:
9022: countacc($url) : count the number of accesses to a given URL
9023:
9024: =item *
9025:
9026: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
9027:
9028: =item *
9029:
9030: checkin($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 $tcrsid)
9031:
9032: =item *
9033:
9034: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
9035:
9036: =item *
9037:
9038: devalidate($symb) : devalidate temporary spreadsheet calculations,
9039: forcing spreadsheet to reevaluate the resource scores next time.
9040:
9041: =back
9042:
9043: =head2 Storing/Retreiving Data
9044:
9045: =over 4
9046:
9047: =item *
9048:
9049: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
9050: for this url; hashref needs to be given and should be a \%hashname; the
9051: remaining args aren't required and if they aren't passed or are '' they will
9052: be derived from the env
9053:
9054: =item *
9055:
9056: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
9057: uses critical subroutine
9058:
9059: =item *
9060:
9061: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
9062: all args are optional
9063:
9064: =item *
9065:
9066: dumpstore($namespace,$udom,$uname,$regexp,$range) :
9067: dumps the complete (or key matching regexp) namespace into a hash
9068: ($udom, $uname, $regexp, $range are optional) for a namespace that is
9069: normally &store()ed into
9070:
9071: $range should be either an integer '100' (give me the first 100
9072: matching records)
9073: or be two integers sperated by a - with no spaces
9074: '30-50' (give me the 30th through the 50th matching
9075: records)
9076:
9077:
9078: =item *
9079:
9080: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
9081: replaces a &store() version of data with a replacement set of data
9082: for a particular resource in a namespace passed in the $storehash hash
9083: reference
9084:
9085: =item *
9086:
9087: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
9088: works very similar to store/cstore, but all data is stored in a
9089: temporary location and can be reset using tmpreset, $storehash should
9090: be a hash reference, returns nothing on success
9091:
9092: =item *
9093:
9094: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
9095: similar to restore, but all data is stored in a temporary location and
9096: can be reset using tmpreset. Returns a hash of values on success,
9097: error string otherwise.
9098:
9099: =item *
9100:
9101: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
9102: deltes all keys for $symb form the temporary storage hash.
9103:
9104: =item *
9105:
9106: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
9107: reference filled in from namesp ($udom and $uname are optional)
9108:
9109: =item *
9110:
9111: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
9112: namesp ($udom and $uname are optional)
9113:
9114: =item *
9115:
9116: dump($namespace,$udom,$uname,$regexp,$range) :
9117: dumps the complete (or key matching regexp) namespace into a hash
9118: ($udom, $uname, $regexp, $range are optional)
9119:
9120: $range should be either an integer '100' (give me the first 100
9121: matching records)
9122: or be two integers sperated by a - with no spaces
9123: '30-50' (give me the 30th through the 50th matching
9124: records)
9125: =item *
9126:
9127: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
9128: $store can be a scalar, an array reference, or if the amount to be
9129: incremented is > 1, a hash reference.
9130:
9131: ($udom and $uname are optional)
9132:
9133: =item *
9134:
9135: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
9136: ($udom and $uname are optional)
9137:
9138: =item *
9139:
9140: cput($namespace,$storehash,$udom,$uname) : critical put
9141: ($udom and $uname are optional)
9142:
9143: =item *
9144:
9145: newput($namespace,$storehash,$udom,$uname) :
9146:
9147: Attempts to store the items in the $storehash, but only if they don't
9148: currently exist, if this succeeds you can be certain that you have
9149: successfully created a new key value pair in the $namespace db.
9150:
9151:
9152: Args:
9153: $namespace: name of database to store values to
9154: $storehash: hashref to store to the db
9155: $udom: (optional) domain of user containing the db
9156: $uname: (optional) name of user caontaining the db
9157:
9158: Returns:
9159: 'ok' -> succeeded in storing all keys of $storehash
9160: 'key_exists: <key>' -> failed to anything out of $storehash, as at
9161: least <key> already existed in the db (other
9162: requested keys may also already exist)
9163: 'error: <msg>' -> unable to tie the DB or other erorr occured
9164: 'con_lost' -> unable to contact request server
9165: 'refused' -> action was not allowed by remote machine
9166:
9167:
9168: =item *
9169:
9170: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
9171: reference filled in from namesp (encrypts the return communication)
9172: ($udom and $uname are optional)
9173:
9174: =item *
9175:
9176: log($udom,$name,$home,$message) : write to permanent log for user; use
9177: critical subroutine
9178:
9179: =item *
9180:
9181: get_dom($namespace,$storearr,$udom,$uhome) : returns hash with keys from
9182: array reference filled in from namespace found in domain level on either
9183: specified domain server ($uhome) or primary domain server ($udom and $uhome are optional).
9184:
9185: =item *
9186:
9187: put_dom($namespace,$storehash,$udom,$uhome) : stores hash in namespace at
9188: domain level either on specified domain server ($uhome) or primary domain
9189: server ($udom and $uhome are optional)
9190:
9191: =back
9192:
9193: =head2 Network Status Functions
9194:
9195: =over 4
9196:
9197: =item *
9198:
9199: dirlist($uri) : return directory list based on URI
9200:
9201: =item *
9202:
9203: spareserver() : find server with least workload from spare.tab
9204:
9205: =back
9206:
9207: =head2 Apache Request
9208:
9209: =over 4
9210:
9211: =item *
9212:
9213: ssi($url,%hash) : server side include, does a complete request cycle on url to
9214: localhost, posts hash
9215:
9216: =back
9217:
9218: =head2 Data to String to Data
9219:
9220: =over 4
9221:
9222: =item *
9223:
9224: hash2str(%hash) : convert a hash into a string complete with escaping and '='
9225: and '&' separators, supports elements that are arrayrefs and hashrefs
9226:
9227: =item *
9228:
9229: hashref2str($hashref) : convert a hashref into a string complete with
9230: escaping and '=' and '&' separators, supports elements that are
9231: arrayrefs and hashrefs
9232:
9233: =item *
9234:
9235: arrayref2str($arrayref) : convert an arrayref into a string complete
9236: with escaping and '&' separators, supports elements that are arrayrefs
9237: and hashrefs
9238:
9239: =item *
9240:
9241: str2hash($string) : convert string to hash using unescaping and
9242: splitting on '=' and '&', supports elements that are arrayrefs and
9243: hashrefs
9244:
9245: =item *
9246:
9247: str2array($string) : convert string to hash using unescaping and
9248: splitting on '&', supports elements that are arrayrefs and hashrefs
9249:
9250: =back
9251:
9252: =head2 Logging Routines
9253:
9254: =over 4
9255:
9256: These routines allow one to make log messages in the lonnet.log and
9257: lonnet.perm logfiles.
9258:
9259: =item *
9260:
9261: logtouch() : make sure the logfile, lonnet.log, exists
9262:
9263: =item *
9264:
9265: logthis() : append message to the normal lonnet.log file, it gets
9266: preiodically rolled over and deleted.
9267:
9268: =item *
9269:
9270: logperm() : append a permanent message to lonnet.perm.log, this log
9271: file never gets deleted by any automated portion of the system, only
9272: messages of critical importance should go in here.
9273:
9274: =back
9275:
9276: =head2 General File Helper Routines
9277:
9278: =over 4
9279:
9280: =item *
9281:
9282: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
9283: (a) files in /uploaded
9284: (i) If a local copy of the file exists -
9285: compares modification date of local copy with last-modified date for
9286: definitive version stored on home server for course. If local copy is
9287: stale, requests a new version from the home server and stores it.
9288: If the original has been removed from the home server, then local copy
9289: is unlinked.
9290: (ii) If local copy does not exist -
9291: requests the file from the home server and stores it.
9292:
9293: If $caller is 'uploadrep':
9294: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
9295: for request for files originally uploaded via DOCS.
9296: - returns 'ok' if fresh local copy now available, -1 otherwise.
9297:
9298: Otherwise:
9299: This indicates a call from the content generation phase of the request.
9300: - returns the entire contents of the file or -1.
9301:
9302: (b) files in /res
9303: - returns the entire contents of a file or -1;
9304: it properly subscribes to and replicates the file if neccessary.
9305:
9306:
9307: =item *
9308:
9309: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
9310: reference
9311:
9312: returns either a stat() list of data about the file or an empty list
9313: if the file doesn't exist or couldn't find out about it (connection
9314: problems or user unknown)
9315:
9316: =item *
9317:
9318: filelocation($dir,$file) : returns file system location of a file
9319: based on URI; meant to be "fairly clean" absolute reference, $dir is a
9320: directory that relative $file lookups are to looked in ($dir of /a/dir
9321: and a file of ../bob will become /a/bob)
9322:
9323: =item *
9324:
9325: hreflocation($dir,$file) : returns file system location or a URL; same as
9326: filelocation except for hrefs
9327:
9328: =item *
9329:
9330: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
9331:
9332: =back
9333:
9334: =head2 Usererfile file routines (/uploaded*)
9335:
9336: =over 4
9337:
9338: =item *
9339:
9340: userfileupload(): main rotine for putting a file in a user or course's
9341: filespace, arguments are,
9342:
9343: formname - required - this is the name of the element in $env where the
9344: filename, and the contents of the file to create/modifed exist
9345: the filename is in $env{'form.'.$formname.'.filename'} and the
9346: contents of the file is located in $env{'form.'.$formname}
9347: coursedoc - if true, store the file in the course of the active role
9348: of the current user
9349: subdir - required - subdirectory to put the file in under ../userfiles/
9350: if undefined, it will be placed in "unknown"
9351:
9352: (This routine calls clean_filename() to remove any dangerous
9353: characters from the filename, and then calls finuserfileupload() to
9354: complete the transaction)
9355:
9356: returns either the url of the uploaded file (/uploaded/....) if successful
9357: and /adm/notfound.html if unsuccessful
9358:
9359: =item *
9360:
9361: clean_filename(): routine for cleaing a filename up for storage in
9362: userfile space, argument is:
9363:
9364: filename - proposed filename
9365:
9366: returns: the new clean filename
9367:
9368: =item *
9369:
9370: finishuserfileupload(): routine that creaes and sends the file to
9371: userspace, probably shouldn't be called directly
9372:
9373: docuname: username or courseid of destination for the file
9374: docudom: domain of user/course of destination for the file
9375: formname: same as for userfileupload()
9376: fname: filename (inculding subdirectories) for the file
9377:
9378: returns either the url of the uploaded file (/uploaded/....) if successful
9379: and /adm/notfound.html if unsuccessful
9380:
9381: =item *
9382:
9383: renameuserfile(): renames an existing userfile to a new name
9384:
9385: Args:
9386: docuname: username or courseid of destination for the file
9387: docudom: domain of user/course of destination for the file
9388: old: current file name (including any subdirs under userfiles)
9389: new: desired file name (including any subdirs under userfiles)
9390:
9391: =item *
9392:
9393: mkdiruserfile(): creates a directory is a userfiles dir
9394:
9395: Args:
9396: docuname: username or courseid of destination for the file
9397: docudom: domain of user/course of destination for the file
9398: dir: dir to create (including any subdirs under userfiles)
9399:
9400: =item *
9401:
9402: removeuserfile(): removes a file that exists in userfiles
9403:
9404: Args:
9405: docuname: username or courseid of destination for the file
9406: docudom: domain of user/course of destination for the file
9407: fname: filname to delete (including any subdirs under userfiles)
9408:
9409: =item *
9410:
9411: removeuploadedurl(): convience function for removeuserfile()
9412:
9413: Args:
9414: url: a full /uploaded/... url to delete
9415:
9416: =item *
9417:
9418: get_portfile_permissions():
9419: Args:
9420: domain: domain of user or course contain the portfolio files
9421: user: name of user or num of course contain the portfolio files
9422: Returns:
9423: hashref of a dump of the proper file_permissions.db
9424:
9425:
9426: =item *
9427:
9428: get_access_controls():
9429:
9430: Args:
9431: current_permissions: the hash ref returned from get_portfile_permissions()
9432: group: (optional) the group you want the files associated with
9433: file: (optional) the file you want access info on
9434:
9435: Returns:
9436: a hash (keys are file names) of hashes containing
9437: keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
9438: values are XML containing access control settings (see below)
9439:
9440: Internal notes:
9441:
9442: access controls are stored in file_permissions.db as key=value pairs.
9443: key -> path to file/file_name\0uniqueID:scope_end_start
9444: where scope -> public,guest,course,group,domains or users.
9445: end -> UNIX time for end of access (0 -> no end date)
9446: start -> UNIX time for start of access
9447:
9448: value -> XML description of access control
9449: <scope type=""> (type =1 of: public,guest,course,group,domains,users">
9450: <start></start>
9451: <end></end>
9452:
9453: <password></password> for scope type = guest
9454:
9455: <domain></domain> for scope type = course or group
9456: <number></number>
9457: <roles id="">
9458: <role></role>
9459: <access></access>
9460: <section></section>
9461: <group></group>
9462: </roles>
9463:
9464: <dom></dom> for scope type = domains
9465:
9466: <users> for scope type = users
9467: <user>
9468: <uname></uname>
9469: <udom></udom>
9470: </user>
9471: </users>
9472: </scope>
9473:
9474: Access data is also aggregated for each file in an additional key=value pair:
9475: key -> path to file/file_name\0accesscontrol
9476: value -> reference to hash
9477: hash contains key = value pairs
9478: where key = uniqueID:scope_end_start
9479: value = UNIX time record was last updated
9480:
9481: Used to improve speed of look-ups of access controls for each file.
9482:
9483: Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
9484:
9485: modify_access_controls():
9486:
9487: Modifies access controls for a portfolio file
9488: Args
9489: 1. file name
9490: 2. reference to hash of required changes,
9491: 3. domain
9492: 4. username
9493: where domain,username are the domain of the portfolio owner
9494: (either a user or a course)
9495:
9496: Returns:
9497: 1. result of additions or updates ('ok' or 'error', with error message).
9498: 2. result of deletions ('ok' or 'error', with error message).
9499: 3. reference to hash of any new or updated access controls.
9500: 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
9501: key = integer (inbound ID)
9502: value = uniqueID
9503:
9504: =back
9505:
9506: =head2 HTTP Helper Routines
9507:
9508: =over 4
9509:
9510: =item *
9511:
9512: escape() : unpack non-word characters into CGI-compatible hex codes
9513:
9514: =item *
9515:
9516: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
9517:
9518: =back
9519:
9520: =head1 PRIVATE SUBROUTINES
9521:
9522: =head2 Underlying communication routines (Shouldn't call)
9523:
9524: =over 4
9525:
9526: =item *
9527:
9528: subreply() : tries to pass a message to lonc, returns con_lost if incapable
9529:
9530: =item *
9531:
9532: reply() : uses subreply to send a message to remote machine, logs all failures
9533:
9534: =item *
9535:
9536: critical() : passes a critical message to another server; if cannot
9537: get through then place message in connection buffer directory and
9538: returns con_delayed, if incapable of saving message, returns
9539: con_failed
9540:
9541: =item *
9542:
9543: reconlonc() : tries to reconnect lonc client processes.
9544:
9545: =back
9546:
9547: =head2 Resource Access Logging
9548:
9549: =over 4
9550:
9551: =item *
9552:
9553: flushcourselogs() : flush (save) buffer logs and access logs
9554:
9555: =item *
9556:
9557: courselog($what) : save message for course in hash
9558:
9559: =item *
9560:
9561: courseacclog($what) : save message for course using &courselog(). Perform
9562: special processing for specific resource types (problems, exams, quizzes, etc).
9563:
9564: =item *
9565:
9566: goodbye() : flush course logs and log shutting down; it is called in srm.conf
9567: as a PerlChildExitHandler
9568:
9569: =back
9570:
9571: =head2 Other
9572:
9573: =over 4
9574:
9575: =item *
9576:
9577: symblist($mapname,%newhash) : update symbolic storage links
9578:
9579: =back
9580:
9581: =cut
9582:
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