1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.915 2007/10/01 21:06:04 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: open(my $idf,'+<',"$lonidsdir/$handle.id");
324: if (!$idf) {
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: open(my $idf,'+<',"$lonidsdir/$handle.id");
366: if (!$idf) {
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: sub timed_flock {
401: my ($file,$lock_type) = @_;
402: my $failed=0;
403: eval {
404: local $SIG{__DIE__}='DEFAULT';
405: local $SIG{ALRM}=sub {
406: $failed=1;
407: die("failed lock");
408: };
409: alarm(13);
410: flock($file,$lock_type);
411: alarm(0);
412: };
413: if ($failed) {
414: return undef;
415: } else {
416: return 1;
417: }
418: }
419:
420: # ---------------------------------------------------------- Append Environment
421:
422: sub appenv {
423: my %newenv=@_;
424: foreach my $key (keys(%newenv)) {
425: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
426: &logthis("<font color=\"blue\">WARNING: ".
427: "Attempt to modify environment ".$key." to ".$newenv{$key}
428: .'</font>');
429: delete($newenv{$key});
430: } else {
431: $env{$key}=$newenv{$key};
432: }
433: }
434: open(my $env_file,'+<',$env{'user.environment'});
435: if ($env_file
436: && &timed_flock($env_file,LOCK_EX)
437: &&
438: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
439: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
440: while (my ($key,$value) = each(%newenv)) {
441: $disk_env{$key} = $value;
442: }
443: untie(%disk_env);
444: }
445: return 'ok';
446: }
447: # ----------------------------------------------------- Delete from Environment
448:
449: sub delenv {
450: my $delthis=shift;
451: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
452: &logthis("<font color=\"blue\">WARNING: ".
453: "Attempt to delete from environment ".$delthis);
454: return 'error';
455: }
456: open(my $env_file,'+<',$env{'user.environment'});
457: if ($env_file
458: && &timed_flock($env_file,LOCK_EX)
459: &&
460: tie(my %disk_env,'GDBM_File',$env{'user.environment'},
461: (&GDBM_WRITER()|&GDBM_NOLOCK()),0640)) {
462: foreach my $key (keys(%disk_env)) {
463: if ($key=~/^$delthis/) {
464: delete($env{$key});
465: delete($disk_env{$key});
466: }
467: }
468: untie(%disk_env);
469: }
470: return 'ok';
471: }
472:
473: sub get_env_multiple {
474: my ($name) = @_;
475: my @values;
476: if (defined($env{$name})) {
477: # exists is it an array
478: if (ref($env{$name})) {
479: @values=@{ $env{$name} };
480: } else {
481: $values[0]=$env{$name};
482: }
483: }
484: return(@values);
485: }
486:
487: # ------------------------------------------ Find out current server userload
488: # there is a copy in lond
489: sub userload {
490: my $numusers=0;
491: {
492: opendir(LONIDS,$perlvar{'lonIDsDir'});
493: my $filename;
494: my $curtime=time;
495: while ($filename=readdir(LONIDS)) {
496: if ($filename eq '.' || $filename eq '..') {next;}
497: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
498: if ($curtime-$mtime < 1800) { $numusers++; }
499: }
500: closedir(LONIDS);
501: }
502: my $userloadpercent=0;
503: my $maxuserload=$perlvar{'lonUserLoadLim'};
504: if ($maxuserload) {
505: $userloadpercent=100*$numusers/$maxuserload;
506: }
507: $userloadpercent=sprintf("%.2f",$userloadpercent);
508: return $userloadpercent;
509: }
510:
511: # ------------------------------------------ Fight off request when overloaded
512:
513: sub overloaderror {
514: my ($r,$checkserver)=@_;
515: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
516: my $loadavg;
517: if ($checkserver eq $perlvar{'lonHostID'}) {
518: open(my $loadfile,'/proc/loadavg');
519: $loadavg=<$loadfile>;
520: $loadavg =~ s/\s.*//g;
521: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
522: close($loadfile);
523: } else {
524: $loadavg=&reply('load',$checkserver);
525: }
526: my $overload=$loadavg-100;
527: if ($overload>0) {
528: $r->err_headers_out->{'Retry-After'}=$overload;
529: $r->log_error('Overload of '.$overload.' on '.$checkserver);
530: return 413;
531: }
532: return '';
533: }
534:
535: # ------------------------------ Find server with least workload from spare.tab
536:
537: sub spareserver {
538: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
539: my $spare_server;
540: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
541: my $lowest_load=($loadpercent > $userloadpercent) ? $loadpercent
542: : $userloadpercent;
543:
544: foreach my $try_server (@{ $spareid{'primary'} }) {
545: ($spare_server, $lowest_load) =
546: &compare_server_load($try_server, $spare_server, $lowest_load);
547: }
548:
549: my $found_server = ($spare_server ne '' && $lowest_load < 100);
550:
551: if (!$found_server) {
552: foreach my $try_server (@{ $spareid{'default'} }) {
553: ($spare_server, $lowest_load) =
554: &compare_server_load($try_server, $spare_server, $lowest_load);
555: }
556: }
557:
558: if (!$want_server_name) {
559: $spare_server="http://".&hostname($spare_server);
560: }
561: return $spare_server;
562: }
563:
564: sub compare_server_load {
565: my ($try_server, $spare_server, $lowest_load) = @_;
566:
567: my $loadans = &reply('load', $try_server);
568: my $userloadans = &reply('userload',$try_server);
569:
570: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
571: next; #didn't get a number from the server
572: }
573:
574: my $load;
575: if ($loadans =~ /\d/) {
576: if ($userloadans =~ /\d/) {
577: #both are numbers, pick the bigger one
578: $load = ($loadans > $userloadans) ? $loadans
579: : $userloadans;
580: } else {
581: $load = $loadans;
582: }
583: } else {
584: $load = $userloadans;
585: }
586:
587: if (($load =~ /\d/) && ($load < $lowest_load)) {
588: $spare_server = $try_server;
589: $lowest_load = $load;
590: }
591: return ($spare_server,$lowest_load);
592: }
593:
594: # --------------------------- ask offload servers if user already has a session
595: sub find_existing_session {
596: my ($udom,$uname) = @_;
597: foreach my $try_server (@{ $spareid{'primary'} },
598: @{ $spareid{'default'} }) {
599: return $try_server if (&has_user_session($try_server, $udom, $uname));
600: }
601: return;
602: }
603:
604: # -------------------------------- ask if server already has a session for user
605: sub has_user_session {
606: my ($lonid,$udom,$uname) = @_;
607: my $result = &reply(join(':','userhassession',
608: map {&escape($_)} ($udom,$uname)),$lonid);
609: return 1 if ($result eq 'ok');
610:
611: return 0;
612: }
613:
614: # --------------------------------------------- Try to change a user's password
615:
616: sub changepass {
617: my ($uname,$udom,$currentpass,$newpass,$server,$context)=@_;
618: $currentpass = &escape($currentpass);
619: $newpass = &escape($newpass);
620: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass:$context",
621: $server);
622: if (! $answer) {
623: &logthis("No reply on password change request to $server ".
624: "by $uname in domain $udom.");
625: } elsif ($answer =~ "^ok") {
626: &logthis("$uname in $udom successfully changed their password ".
627: "on $server.");
628: } elsif ($answer =~ "^pwchange_failure") {
629: &logthis("$uname in $udom was unable to change their password ".
630: "on $server. The action was blocked by either lcpasswd ".
631: "or pwchange");
632: } elsif ($answer =~ "^non_authorized") {
633: &logthis("$uname in $udom did not get their password correct when ".
634: "attempting to change it on $server.");
635: } elsif ($answer =~ "^auth_mode_error") {
636: &logthis("$uname in $udom attempted to change their password despite ".
637: "not being locally or internally authenticated on $server.");
638: } elsif ($answer =~ "^unknown_user") {
639: &logthis("$uname in $udom attempted to change their password ".
640: "on $server but were unable to because $server is not ".
641: "their home server.");
642: } elsif ($answer =~ "^refused") {
643: &logthis("$server refused to change $uname in $udom password because ".
644: "it was sent an unencrypted request to change the password.");
645: }
646: return $answer;
647: }
648:
649: # ----------------------- Try to determine user's current authentication scheme
650:
651: sub queryauthenticate {
652: my ($uname,$udom)=@_;
653: my $uhome=&homeserver($uname,$udom);
654: if (!$uhome) {
655: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
656: return 'no_host';
657: }
658: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
659: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
660: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
661: }
662: return $answer;
663: }
664:
665: # --------- Try to authenticate user from domain's lib servers (first this one)
666:
667: sub authenticate {
668: my ($uname,$upass,$udom)=@_;
669: $upass=&escape($upass);
670: $uname= &LONCAPA::clean_username($uname);
671: my $uhome=&homeserver($uname,$udom,1);
672: if ((!$uhome) || ($uhome eq 'no_host')) {
673: # Maybe the machine was offline and only re-appeared again recently?
674: &reconlonc();
675: # One more
676: my $uhome=&homeserver($uname,$udom,1);
677: if ((!$uhome) || ($uhome eq 'no_host')) {
678: &logthis("User $uname at $udom is unknown in authenticate");
679: }
680: return 'no_host';
681: }
682: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
683: if ($answer eq 'authorized') {
684: &logthis("User $uname at $udom authorized by $uhome");
685: return $uhome;
686: }
687: if ($answer eq 'non_authorized') {
688: &logthis("User $uname at $udom rejected by $uhome");
689: return 'no_host';
690: }
691: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
692: return 'no_host';
693: }
694:
695: # ---------------------- Find the homebase for a user from domain's lib servers
696:
697: my %homecache;
698: sub homeserver {
699: my ($uname,$udom,$ignoreBadCache)=@_;
700: my $index="$uname:$udom";
701:
702: if (exists($homecache{$index})) { return $homecache{$index}; }
703:
704: my %servers = &get_servers($udom,'library');
705: foreach my $tryserver (keys(%servers)) {
706: next if ($ignoreBadCache ne 'true' &&
707: exists($badServerCache{$tryserver}));
708:
709: my $answer=reply("home:$udom:$uname",$tryserver);
710: if ($answer eq 'found') {
711: delete($badServerCache{$tryserver});
712: return $homecache{$index}=$tryserver;
713: } elsif ($answer eq 'no_host') {
714: $badServerCache{$tryserver}=1;
715: }
716: }
717: return 'no_host';
718: }
719:
720: # ------------------------------------- Find the usernames behind a list of IDs
721:
722: sub idget {
723: my ($udom,@ids)=@_;
724: my %returnhash=();
725:
726: my %servers = &get_servers($udom,'library');
727: foreach my $tryserver (keys(%servers)) {
728: my $idlist=join('&',@ids);
729: $idlist=~tr/A-Z/a-z/;
730: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
731: my @answer=();
732: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
733: @answer=split(/\&/,$reply);
734: } ;
735: my $i;
736: for ($i=0;$i<=$#ids;$i++) {
737: if ($answer[$i]) {
738: $returnhash{$ids[$i]}=$answer[$i];
739: }
740: }
741: }
742: return %returnhash;
743: }
744:
745: # ------------------------------------- Find the IDs behind a list of usernames
746:
747: sub idrget {
748: my ($udom,@unames)=@_;
749: my %returnhash=();
750: foreach my $uname (@unames) {
751: $returnhash{$uname}=(&userenvironment($udom,$uname,'id'))[1];
752: }
753: return %returnhash;
754: }
755:
756: # ------------------------------- Store away a list of names and associated IDs
757:
758: sub idput {
759: my ($udom,%ids)=@_;
760: my %servers=();
761: foreach my $uname (keys(%ids)) {
762: &cput('environment',{'id'=>$ids{$uname}},$udom,$uname);
763: my $uhom=&homeserver($uname,$udom);
764: if ($uhom ne 'no_host') {
765: my $id=&escape($ids{$uname});
766: $id=~tr/A-Z/a-z/;
767: my $esc_unam=&escape($uname);
768: if ($servers{$uhom}) {
769: $servers{$uhom}.='&'.$id.'='.$esc_unam;
770: } else {
771: $servers{$uhom}=$id.'='.$esc_unam;
772: }
773: }
774: }
775: foreach my $server (keys(%servers)) {
776: &critical('idput:'.$udom.':'.$servers{$server},$server);
777: }
778: }
779:
780: # ------------------------------------------- get items from domain db files
781:
782: sub get_dom {
783: my ($namespace,$storearr,$udom,$uhome)=@_;
784: my $items='';
785: foreach my $item (@$storearr) {
786: $items.=&escape($item).'&';
787: }
788: $items=~s/\&$//;
789: if (!$udom) {
790: $udom=$env{'user.domain'};
791: if (defined(&domain($udom,'primary'))) {
792: $uhome=&domain($udom,'primary');
793: } else {
794: undef($uhome);
795: }
796: } else {
797: if (!$uhome) {
798: if (defined(&domain($udom,'primary'))) {
799: $uhome=&domain($udom,'primary');
800: }
801: }
802: }
803: if ($udom && $uhome && ($uhome ne 'no_host')) {
804: my $rep=&reply("getdom:$udom:$namespace:$items",$uhome);
805: my %returnhash;
806: if ($rep eq '' || $rep =~ /^error: 2 /) {
807: return %returnhash;
808: }
809: my @pairs=split(/\&/,$rep);
810: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
811: return @pairs;
812: }
813: my $i=0;
814: foreach my $item (@$storearr) {
815: $returnhash{$item}=&thaw_unescape($pairs[$i]);
816: $i++;
817: }
818: return %returnhash;
819: } else {
820: &logthis("get_dom failed - no homeserver and/or domain ($udom) ($uhome)");
821: }
822: }
823:
824: # -------------------------------------------- put items in domain db files
825:
826: sub put_dom {
827: my ($namespace,$storehash,$udom,$uhome)=@_;
828: if (!$udom) {
829: $udom=$env{'user.domain'};
830: if (defined(&domain($udom,'primary'))) {
831: $uhome=&domain($udom,'primary');
832: } else {
833: undef($uhome);
834: }
835: } else {
836: if (!$uhome) {
837: if (defined(&domain($udom,'primary'))) {
838: $uhome=&domain($udom,'primary');
839: }
840: }
841: }
842: if ($udom && $uhome && ($uhome ne 'no_host')) {
843: my $items='';
844: foreach my $item (keys(%$storehash)) {
845: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
846: }
847: $items=~s/\&$//;
848: return &reply("putdom:$udom:$namespace:$items",$uhome);
849: } else {
850: &logthis("put_dom failed - no homeserver and/or domain");
851: }
852: }
853:
854: sub retrieve_inst_usertypes {
855: my ($udom) = @_;
856: my (%returnhash,@order);
857: if (defined(&domain($udom,'primary'))) {
858: my $uhome=&domain($udom,'primary');
859: my $rep=&reply("inst_usertypes:$udom",$uhome);
860: my ($hashitems,$orderitems) = split(/:/,$rep);
861: my @pairs=split(/\&/,$hashitems);
862: foreach my $item (@pairs) {
863: my ($key,$value)=split(/=/,$item,2);
864: $key = &unescape($key);
865: next if ($key =~ /^error: 2 /);
866: $returnhash{$key}=&thaw_unescape($value);
867: }
868: my @esc_order = split(/\&/,$orderitems);
869: foreach my $item (@esc_order) {
870: push(@order,&unescape($item));
871: }
872: } else {
873: &logthis("get_dom failed - no primary domain server for $udom");
874: }
875: return (\%returnhash,\@order);
876: }
877:
878: sub is_domainimage {
879: my ($url) = @_;
880: if ($url=~m-^/+res/+($match_domain)/+\1\-domainconfig/+(img|logo|domlogo)/+-) {
881: if (&domain($1) ne '') {
882: return '1';
883: }
884: }
885: return;
886: }
887:
888: sub inst_directory_query {
889: my ($srch) = @_;
890: my $udom = $srch->{'srchdomain'};
891: my %results;
892: my $homeserver = &domain($udom,'primary');
893: my $outcome;
894: if ($homeserver ne '') {
895: my $queryid=&reply("querysend:instdirsearch:".
896: &escape($srch->{'srchby'}).':'.
897: &escape($srch->{'srchterm'}).':'.
898: &escape($srch->{'srchtype'}),$homeserver);
899: my $host=&hostname($homeserver);
900: if ($queryid !~/^\Q$host\E\_/) {
901: &logthis('instituional directory search invalid queryid: '.$queryid.' for host: '.$homeserver.'in domain '.$udom);
902: return;
903: }
904: my $response = &get_query_reply($queryid);
905: my $maxtries = 5;
906: my $tries = 1;
907: while (($response=~/^timeout/) && ($tries < $maxtries)) {
908: $response = &get_query_reply($queryid);
909: $tries ++;
910: }
911:
912: if (!&error($response) && $response ne 'refused') {
913: if ($response eq 'unavailable') {
914: $outcome = $response;
915: } else {
916: $outcome = 'ok';
917: my @matches = split(/\n/,$response);
918: foreach my $match (@matches) {
919: my ($key,$value) = split(/=/,$match);
920: $results{&unescape($key).':'.$udom} = &thaw_unescape($value);
921: }
922: }
923: }
924: }
925: return ($outcome,%results);
926: }
927:
928: sub usersearch {
929: my ($srch) = @_;
930: my $dom = $srch->{'srchdomain'};
931: my %results;
932: my %libserv = &all_library();
933: my $query = 'usersearch';
934: foreach my $tryserver (keys(%libserv)) {
935: if (&host_domain($tryserver) eq $dom) {
936: my $host=&hostname($tryserver);
937: my $queryid=
938: &reply("querysend:".&escape($query).':'.
939: &escape($srch->{'srchby'}).':'.
940: &escape($srch->{'srchtype'}).':'.
941: &escape($srch->{'srchterm'}),$tryserver);
942: if ($queryid !~/^\Q$host\E\_/) {
943: &logthis('usersearch: invalid queryid: '.$queryid.' for host: '.$host.'in domain '.$dom.' and server: '.$tryserver);
944: next;
945: }
946: my $reply = &get_query_reply($queryid);
947: my $maxtries = 1;
948: my $tries = 1;
949: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
950: $reply = &get_query_reply($queryid);
951: $tries ++;
952: }
953: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
954: &logthis('usersrch error: '.$reply.' for '.$dom.' - searching for : '.$srch->{'srchterm'}.' by '.$srch->{'srchby'}.' ('.$srch->{'srchtype'}.') - maxtries: '.$maxtries.' tries: '.$tries);
955: } else {
956: my @matches;
957: if ($reply =~ /\n/) {
958: @matches = split(/\n/,$reply);
959: } else {
960: @matches = split(/\&/,$reply);
961: }
962: foreach my $match (@matches) {
963: my ($uname,$udom,%userhash);
964: foreach my $entry (split(/:/,$match)) {
965: my ($key,$value) =
966: map {&unescape($_);} split(/=/,$entry);
967: $userhash{$key} = $value;
968: if ($key eq 'username') {
969: $uname = $value;
970: } elsif ($key eq 'domain') {
971: $udom = $value;
972: }
973: }
974: $results{$uname.':'.$udom} = \%userhash;
975: }
976: }
977: }
978: }
979: return %results;
980: }
981:
982: sub get_instuser {
983: my ($udom,$uname,$id) = @_;
984: my $homeserver = &domain($udom,'primary');
985: my ($outcome,%results);
986: if ($homeserver ne '') {
987: my $queryid=&reply("querysend:getinstuser:".&escape($uname).':'.
988: &escape($id).':'.&escape($udom),$homeserver);
989: my $host=&hostname($homeserver);
990: if ($queryid !~/^\Q$host\E\_/) {
991: &logthis('get_instuser invalid queryid: '.$queryid.' for host: '.$homeserver.'in domain '.$udom);
992: return;
993: }
994: my $response = &get_query_reply($queryid);
995: my $maxtries = 5;
996: my $tries = 1;
997: while (($response=~/^timeout/) && ($tries < $maxtries)) {
998: $response = &get_query_reply($queryid);
999: $tries ++;
1000: }
1001: if (!&error($response) && $response ne 'refused') {
1002: if ($response eq 'unavailable') {
1003: $outcome = $response;
1004: } else {
1005: $outcome = 'ok';
1006: my @matches = split(/\n/,$response);
1007: foreach my $match (@matches) {
1008: my ($key,$value) = split(/=/,$match);
1009: $results{&unescape($key)} = &thaw_unescape($value);
1010: }
1011: }
1012: }
1013: }
1014: my %userinfo;
1015: if (ref($results{$uname}) eq 'HASH') {
1016: %userinfo = %{$results{$uname}};
1017: }
1018: return ($outcome,%userinfo);
1019: }
1020:
1021: sub inst_rulecheck {
1022: my ($udom,$uname,$rules) = @_;
1023: my %returnhash;
1024: if ($udom ne '') {
1025: if (ref($rules) eq 'ARRAY') {
1026: @{$rules} = map {&escape($_);} (@{$rules});
1027: my $rulestr = join(':',@{$rules});
1028: my $homeserver=&domain($udom,'primary');
1029: if (($homeserver ne '') && ($homeserver ne 'no_host')) {
1030: my $response=&unescape(&reply('instrulecheck:'.&escape($udom).':'.
1031: &escape($uname).':'.$rulestr,
1032: $homeserver));
1033: if ($response ne 'refused') {
1034: my @pairs=split(/\&/,$response);
1035: foreach my $item (@pairs) {
1036: my ($key,$value)=split(/=/,$item,2);
1037: $key = &unescape($key);
1038: next if ($key =~ /^error: 2 /);
1039: $returnhash{$key}=&thaw_unescape($value);
1040: }
1041: }
1042: }
1043: }
1044: }
1045: return %returnhash;
1046: }
1047:
1048: sub inst_userrules {
1049: my ($udom) = @_;
1050: my (%ruleshash,@ruleorder);
1051: if ($udom ne '') {
1052: my $homeserver=&domain($udom,'primary');
1053: if (($homeserver ne '') && ($homeserver ne 'no_host')) {
1054: my $response=&reply('instuserrules:'.&escape($udom),
1055: $homeserver);
1056: if (($response ne 'refused') && ($response ne 'error') &&
1057: ($response ne 'no_such_host')) {
1058: my ($hashitems,$orderitems) = split(/:/,$response);
1059: my @pairs=split(/\&/,$hashitems);
1060: foreach my $item (@pairs) {
1061: my ($key,$value)=split(/=/,$item,2);
1062: $key = &unescape($key);
1063: next if ($key =~ /^error: 2 /);
1064: $ruleshash{$key}=&thaw_unescape($value);
1065: }
1066: my @esc_order = split(/\&/,$orderitems);
1067: foreach my $item (@esc_order) {
1068: push(@ruleorder,&unescape($item));
1069: }
1070: }
1071: }
1072: }
1073: return (\%ruleshash,\@ruleorder);
1074: }
1075:
1076: # --------------------------------------------------- Assign a key to a student
1077:
1078: sub assign_access_key {
1079: #
1080: # a valid key looks like uname:udom#comments
1081: # comments are being appended
1082: #
1083: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
1084: $kdom=
1085: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
1086: $knum=
1087: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
1088: $cdom=
1089: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1090: $cnum=
1091: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1092: $udom=$env{'user.name'} unless (defined($udom));
1093: $uname=$env{'user.domain'} unless (defined($uname));
1094: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
1095: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
1096: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
1097: # assigned to this person
1098: # - this should not happen,
1099: # unless something went wrong
1100: # the first time around
1101: # ready to assign
1102: $logentry=$1.'; '.$logentry;
1103: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
1104: $kdom,$knum) eq 'ok') {
1105: # key now belongs to user
1106: my $envkey='key.'.$cdom.'_'.$cnum;
1107: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
1108: &appenv('environment.'.$envkey => $ckey);
1109: return 'ok';
1110: } else {
1111: return
1112: 'error: Count not permanently assign key, will need to be re-entered later.';
1113: }
1114: } else {
1115: return 'error: Could not assign key, try again later.';
1116: }
1117: } elsif (!$existing{$ckey}) {
1118: # the key does not exist
1119: return 'error: The key does not exist';
1120: } else {
1121: # the key is somebody else's
1122: return 'error: The key is already in use';
1123: }
1124: }
1125:
1126: # ------------------------------------------ put an additional comment on a key
1127:
1128: sub comment_access_key {
1129: #
1130: # a valid key looks like uname:udom#comments
1131: # comments are being appended
1132: #
1133: my ($ckey,$cdom,$cnum,$logentry)=@_;
1134: $cdom=
1135: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1136: $cnum=
1137: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1138: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1139: if ($existing{$ckey}) {
1140: $existing{$ckey}.='; '.$logentry;
1141: # ready to assign
1142: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
1143: $cdom,$cnum) eq 'ok') {
1144: return 'ok';
1145: } else {
1146: return 'error: Count not store comment.';
1147: }
1148: } else {
1149: # the key does not exist
1150: return 'error: The key does not exist';
1151: }
1152: }
1153:
1154: # ------------------------------------------------------ Generate a set of keys
1155:
1156: sub generate_access_keys {
1157: my ($number,$cdom,$cnum,$logentry)=@_;
1158: $cdom=
1159: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1160: $cnum=
1161: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1162: unless (&allowed('mky',$cdom)) { return 0; }
1163: unless (($cdom) && ($cnum)) { return 0; }
1164: if ($number>10000) { return 0; }
1165: sleep(2); # make sure don't get same seed twice
1166: srand(time()^($$+($$<<15))); # from "Programming Perl"
1167: my $total=0;
1168: for (my $i=1;$i<=$number;$i++) {
1169: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
1170: sprintf("%lx",int(100000*rand)).'-'.
1171: sprintf("%lx",int(100000*rand));
1172: $newkey=~s/1/g/g; # folks mix up 1 and l
1173: $newkey=~s/0/h/g; # and also 0 and O
1174: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
1175: if ($existing{$newkey}) {
1176: $i--;
1177: } else {
1178: if (&put('accesskeys',
1179: { $newkey => '# generated '.localtime().
1180: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
1181: '; '.$logentry },
1182: $cdom,$cnum) eq 'ok') {
1183: $total++;
1184: }
1185: }
1186: }
1187: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
1188: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
1189: return $total;
1190: }
1191:
1192: # ------------------------------------------------------- Validate an accesskey
1193:
1194: sub validate_access_key {
1195: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
1196: $cdom=
1197: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
1198: $cnum=
1199: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
1200: $udom=$env{'user.domain'} unless (defined($udom));
1201: $uname=$env{'user.name'} unless (defined($uname));
1202: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1203: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
1204: }
1205:
1206: # ------------------------------------- Find the section of student in a course
1207: sub devalidate_getsection_cache {
1208: my ($udom,$unam,$courseid)=@_;
1209: my $hashid="$udom:$unam:$courseid";
1210: &devalidate_cache_new('getsection',$hashid);
1211: }
1212:
1213: sub courseid_to_courseurl {
1214: my ($courseid) = @_;
1215: #already url style courseid
1216: return $courseid if ($courseid =~ m{^/});
1217:
1218: if (exists($env{'course.'.$courseid.'.num'})) {
1219: my $cnum = $env{'course.'.$courseid.'.num'};
1220: my $cdom = $env{'course.'.$courseid.'.domain'};
1221: return "/$cdom/$cnum";
1222: }
1223:
1224: my %courseinfo=&Apache::lonnet::coursedescription($courseid);
1225: if (exists($courseinfo{'num'})) {
1226: return "/$courseinfo{'domain'}/$courseinfo{'num'}";
1227: }
1228:
1229: return undef;
1230: }
1231:
1232: sub getsection {
1233: my ($udom,$unam,$courseid)=@_;
1234: my $cachetime=1800;
1235:
1236: my $hashid="$udom:$unam:$courseid";
1237: my ($result,$cached)=&is_cached_new('getsection',$hashid);
1238: if (defined($cached)) { return $result; }
1239:
1240: my %Pending;
1241: my %Expired;
1242: #
1243: # Each role can either have not started yet (pending), be active,
1244: # or have expired.
1245: #
1246: # If there is an active role, we are done.
1247: #
1248: # If there is more than one role which has not started yet,
1249: # choose the one which will start sooner
1250: # If there is one role which has not started yet, return it.
1251: #
1252: # If there is more than one expired role, choose the one which ended last.
1253: # If there is a role which has expired, return it.
1254: #
1255: $courseid = &courseid_to_courseurl($courseid);
1256: my %roleshash = &dump('roles',$udom,$unam,$courseid);
1257: foreach my $key (keys(%roleshash)) {
1258: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
1259: my $section=$1;
1260: if ($key eq $courseid.'_st') { $section=''; }
1261: my ($dummy,$end,$start)=split(/\_/,&unescape($roleshash{$key}));
1262: my $now=time;
1263: if (defined($end) && $end && ($now > $end)) {
1264: $Expired{$end}=$section;
1265: next;
1266: }
1267: if (defined($start) && $start && ($now < $start)) {
1268: $Pending{$start}=$section;
1269: next;
1270: }
1271: return &do_cache_new('getsection',$hashid,$section,$cachetime);
1272: }
1273: #
1274: # Presumedly there will be few matching roles from the above
1275: # loop and the sorting time will be negligible.
1276: if (scalar(keys(%Pending))) {
1277: my ($time) = sort {$a <=> $b} keys(%Pending);
1278: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
1279: }
1280: if (scalar(keys(%Expired))) {
1281: my @sorted = sort {$a <=> $b} keys(%Expired);
1282: my $time = pop(@sorted);
1283: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
1284: }
1285: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
1286: }
1287:
1288: sub save_cache {
1289: &purge_remembered();
1290: #&Apache::loncommon::validate_page();
1291: undef(%env);
1292: undef($env_loaded);
1293: }
1294:
1295: my $to_remember=-1;
1296: my %remembered;
1297: my %accessed;
1298: my $kicks=0;
1299: my $hits=0;
1300: sub make_key {
1301: my ($name,$id) = @_;
1302: if (length($id) > 65
1303: && length(&escape($id)) > 200) {
1304: $id=length($id).':'.&Digest::MD5::md5_hex($id);
1305: }
1306: return &escape($name.':'.$id);
1307: }
1308:
1309: sub devalidate_cache_new {
1310: my ($name,$id,$debug) = @_;
1311: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
1312: $id=&make_key($name,$id);
1313: $memcache->delete($id);
1314: delete($remembered{$id});
1315: delete($accessed{$id});
1316: }
1317:
1318: sub is_cached_new {
1319: my ($name,$id,$debug) = @_;
1320: $id=&make_key($name,$id);
1321: if (exists($remembered{$id})) {
1322: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
1323: $accessed{$id}=[&gettimeofday()];
1324: $hits++;
1325: return ($remembered{$id},1);
1326: }
1327: my $value = $memcache->get($id);
1328: if (!(defined($value))) {
1329: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
1330: return (undef,undef);
1331: }
1332: if ($value eq '__undef__') {
1333: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
1334: $value=undef;
1335: }
1336: &make_room($id,$value,$debug);
1337: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
1338: return ($value,1);
1339: }
1340:
1341: sub do_cache_new {
1342: my ($name,$id,$value,$time,$debug) = @_;
1343: $id=&make_key($name,$id);
1344: my $setvalue=$value;
1345: if (!defined($setvalue)) {
1346: $setvalue='__undef__';
1347: }
1348: if (!defined($time) ) {
1349: $time=600;
1350: }
1351: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
1352: my $result = $memcache->set($id,$setvalue,$time);
1353: if (! $result) {
1354: &logthis("caching of id -> $id failed");
1355: $memcache->disconnect_all();
1356: }
1357: # need to make a copy of $value
1358: #&make_room($id,$value,$debug);
1359: return $value;
1360: }
1361:
1362: sub make_room {
1363: my ($id,$value,$debug)=@_;
1364: $remembered{$id}=$value;
1365: if ($to_remember<0) { return; }
1366: $accessed{$id}=[&gettimeofday()];
1367: if (scalar(keys(%remembered)) <= $to_remember) { return; }
1368: my $to_kick;
1369: my $max_time=0;
1370: foreach my $other (keys(%accessed)) {
1371: if (&tv_interval($accessed{$other}) > $max_time) {
1372: $to_kick=$other;
1373: $max_time=&tv_interval($accessed{$other});
1374: }
1375: }
1376: delete($remembered{$to_kick});
1377: delete($accessed{$to_kick});
1378: $kicks++;
1379: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
1380: return;
1381: }
1382:
1383: sub purge_remembered {
1384: #&logthis("Tossing ".scalar(keys(%remembered)));
1385: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
1386: undef(%remembered);
1387: undef(%accessed);
1388: }
1389: # ------------------------------------- Read an entry from a user's environment
1390:
1391: sub userenvironment {
1392: my ($udom,$unam,@what)=@_;
1393: my %returnhash=();
1394: my @answer=split(/\&/,
1395: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1396: &homeserver($unam,$udom)));
1397: my $i;
1398: for ($i=0;$i<=$#what;$i++) {
1399: $returnhash{$what[$i]}=&unescape($answer[$i]);
1400: }
1401: return %returnhash;
1402: }
1403:
1404: # ---------------------------------------------------------- Get a studentphoto
1405: sub studentphoto {
1406: my ($udom,$unam,$ext) = @_;
1407: my $home=&Apache::lonnet::homeserver($unam,$udom);
1408: if (defined($env{'request.course.id'})) {
1409: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
1410: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
1411: return(&retrievestudentphoto($udom,$unam,$ext));
1412: } else {
1413: my ($result,$perm_reqd)=
1414: &Apache::lonnet::auto_photo_permission($unam,$udom);
1415: if ($result eq 'ok') {
1416: if (!($perm_reqd eq 'yes')) {
1417: return(&retrievestudentphoto($udom,$unam,$ext));
1418: }
1419: }
1420: }
1421: }
1422: } else {
1423: my ($result,$perm_reqd) =
1424: &Apache::lonnet::auto_photo_permission($unam,$udom);
1425: if ($result eq 'ok') {
1426: if (!($perm_reqd eq 'yes')) {
1427: return(&retrievestudentphoto($udom,$unam,$ext));
1428: }
1429: }
1430: }
1431: return '/adm/lonKaputt/lonlogo_broken.gif';
1432: }
1433:
1434: sub retrievestudentphoto {
1435: my ($udom,$unam,$ext,$type) = @_;
1436: my $home=&Apache::lonnet::homeserver($unam,$udom);
1437: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1438: if ($ret eq 'ok') {
1439: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1440: if ($type eq 'thumbnail') {
1441: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1442: }
1443: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1444: return $tokenurl;
1445: } else {
1446: if ($type eq 'thumbnail') {
1447: return '/adm/lonKaputt/genericstudent_tn.gif';
1448: } else {
1449: return '/adm/lonKaputt/lonlogo_broken.gif';
1450: }
1451: }
1452: }
1453:
1454: # -------------------------------------------------------------------- New chat
1455:
1456: sub chatsend {
1457: my ($newentry,$anon,$group)=@_;
1458: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1459: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1460: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1461: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1462: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1463: &escape($newentry)).':'.$group,$chome);
1464: }
1465:
1466: # ------------------------------------------ Find current version of a resource
1467:
1468: sub getversion {
1469: my $fname=&clutter(shift);
1470: unless ($fname=~/^\/res\//) { return -1; }
1471: return ¤tversion(&filelocation('',$fname));
1472: }
1473:
1474: sub currentversion {
1475: my $fname=shift;
1476: my ($result,$cached)=&is_cached_new('resversion',$fname);
1477: if (defined($cached)) { return $result; }
1478: my $author=$fname;
1479: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1480: my ($udom,$uname)=split(/\//,$author);
1481: my $home=homeserver($uname,$udom);
1482: if ($home eq 'no_host') {
1483: return -1;
1484: }
1485: my $answer=reply("currentversion:$fname",$home);
1486: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1487: return -1;
1488: }
1489: return &do_cache_new('resversion',$fname,$answer,600);
1490: }
1491:
1492: # ----------------------------- Subscribe to a resource, return URL if possible
1493:
1494: sub subscribe {
1495: my $fname=shift;
1496: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1497: $fname=~s/[\n\r]//g;
1498: my $author=$fname;
1499: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1500: my ($udom,$uname)=split(/\//,$author);
1501: my $home=homeserver($uname,$udom);
1502: if ($home eq 'no_host') {
1503: return 'not_found';
1504: }
1505: my $answer=reply("sub:$fname",$home);
1506: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1507: $answer.=' by '.$home;
1508: }
1509: return $answer;
1510: }
1511:
1512: # -------------------------------------------------------------- Replicate file
1513:
1514: sub repcopy {
1515: my $filename=shift;
1516: $filename=~s/\/+/\//g;
1517: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1518: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1519: if ($filename=~m|^/home/httpd/html/userfiles/| or
1520: $filename=~m -^/*(uploaded|editupload)/-) {
1521: return &repcopy_userfile($filename);
1522: }
1523: $filename=~s/[\n\r]//g;
1524: my $transname="$filename.in.transfer";
1525: # FIXME: this should flock
1526: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1527: my $remoteurl=subscribe($filename);
1528: if ($remoteurl =~ /^con_lost by/) {
1529: &logthis("Subscribe returned $remoteurl: $filename");
1530: return 'unavailable';
1531: } elsif ($remoteurl eq 'not_found') {
1532: #&logthis("Subscribe returned not_found: $filename");
1533: return 'not_found';
1534: } elsif ($remoteurl =~ /^rejected by/) {
1535: &logthis("Subscribe returned $remoteurl: $filename");
1536: return 'forbidden';
1537: } elsif ($remoteurl eq 'directory') {
1538: return 'ok';
1539: } else {
1540: my $author=$filename;
1541: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1542: my ($udom,$uname)=split(/\//,$author);
1543: my $home=homeserver($uname,$udom);
1544: unless ($home eq $perlvar{'lonHostID'}) {
1545: my @parts=split(/\//,$filename);
1546: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1547: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1548: &logthis("Malconfiguration for replication: $filename");
1549: return 'bad_request';
1550: }
1551: my $count;
1552: for ($count=5;$count<$#parts;$count++) {
1553: $path.="/$parts[$count]";
1554: if ((-e $path)!=1) {
1555: mkdir($path,0777);
1556: }
1557: }
1558: my $ua=new LWP::UserAgent;
1559: my $request=new HTTP::Request('GET',"$remoteurl");
1560: my $response=$ua->request($request,$transname);
1561: if ($response->is_error()) {
1562: unlink($transname);
1563: my $message=$response->status_line;
1564: &logthis("<font color=\"blue\">WARNING:"
1565: ." LWP get: $message: $filename</font>");
1566: return 'unavailable';
1567: } else {
1568: if ($remoteurl!~/\.meta$/) {
1569: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1570: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1571: if ($mresponse->is_error()) {
1572: unlink($filename.'.meta');
1573: &logthis(
1574: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1575: }
1576: }
1577: rename($transname,$filename);
1578: return 'ok';
1579: }
1580: }
1581: }
1582: }
1583:
1584: # ------------------------------------------------ Get server side include body
1585: sub ssi_body {
1586: my ($filelink,%form)=@_;
1587: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1588: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1589: }
1590: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1591: &ssi($filelink,%form));
1592: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
1593: $output=~s/^.*?\<body[^\>]*\>//si;
1594: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1595: return $output;
1596: }
1597:
1598: # --------------------------------------------------------- Server Side Include
1599:
1600: sub absolute_url {
1601: my ($host_name) = @_;
1602: my $protocol = ($ENV{'SERVER_PORT'} == 443?'https://':'http://');
1603: if ($host_name eq '') {
1604: $host_name = $ENV{'SERVER_NAME'};
1605: }
1606: return $protocol.$host_name;
1607: }
1608:
1609: sub ssi {
1610:
1611: my ($fn,%form)=@_;
1612:
1613: my $ua=new LWP::UserAgent;
1614:
1615: my $request;
1616:
1617: $form{'no_update_last_known'}=1;
1618: &Apache::lonenc::check_encrypt(\$fn);
1619: if (%form) {
1620: $request=new HTTP::Request('POST',&absolute_url().$fn);
1621: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1622: } else {
1623: $request=new HTTP::Request('GET',&absolute_url().$fn);
1624: }
1625:
1626: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1627: my $response=$ua->request($request);
1628:
1629: return $response->content;
1630: }
1631:
1632: sub externalssi {
1633: my ($url)=@_;
1634: my $ua=new LWP::UserAgent;
1635: my $request=new HTTP::Request('GET',$url);
1636: my $response=$ua->request($request);
1637: return $response->content;
1638: }
1639:
1640: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1641:
1642: sub allowuploaded {
1643: my ($srcurl,$url)=@_;
1644: $url=&clutter(&declutter($url));
1645: my $dir=$url;
1646: $dir=~s/\/[^\/]+$//;
1647: my %httpref=();
1648: my $httpurl=&hreflocation('',$url);
1649: $httpref{'httpref.'.$httpurl}=$srcurl;
1650: &Apache::lonnet::appenv(%httpref);
1651: }
1652:
1653: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1654: # input: action, courseID, current domain, intended
1655: # path to file, source of file, instruction to parse file for objects,
1656: # ref to hash for embedded objects,
1657: # ref to hash for codebase of java objects.
1658: #
1659: # output: url to file (if action was uploaddoc),
1660: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1661: #
1662: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1663: # course.
1664: #
1665: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1666: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1667: # course's home server.
1668: #
1669: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1670: # be copied from $source (current location) to
1671: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1672: # and will then be copied to
1673: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1674: # course's home server.
1675: #
1676: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1677: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1678: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1679: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1680: # in course's home server.
1681: #
1682:
1683: sub process_coursefile {
1684: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1685: my $fetchresult;
1686: my $home=&homeserver($docuname,$docudom);
1687: if ($action eq 'propagate') {
1688: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1689: $home);
1690: } else {
1691: my $fpath = '';
1692: my $fname = $file;
1693: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1694: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1695: my $filepath = &build_filepath($fpath);
1696: if ($action eq 'copy') {
1697: if ($source eq '') {
1698: $fetchresult = 'no source file';
1699: return $fetchresult;
1700: } else {
1701: my $destination = $filepath.'/'.$fname;
1702: rename($source,$destination);
1703: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1704: $home);
1705: }
1706: } elsif ($action eq 'uploaddoc') {
1707: open(my $fh,'>'.$filepath.'/'.$fname);
1708: print $fh $env{'form.'.$source};
1709: close($fh);
1710: if ($parser eq 'parse') {
1711: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1712: unless ($parse_result eq 'ok') {
1713: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1714: }
1715: }
1716: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1717: $home);
1718: if ($fetchresult eq 'ok') {
1719: return '/uploaded/'.$fpath.'/'.$fname;
1720: } else {
1721: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1722: ' to host '.$home.': '.$fetchresult);
1723: return '/adm/notfound.html';
1724: }
1725: }
1726: }
1727: unless ( $fetchresult eq 'ok') {
1728: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1729: ' to host '.$home.': '.$fetchresult);
1730: }
1731: return $fetchresult;
1732: }
1733:
1734: sub build_filepath {
1735: my ($fpath) = @_;
1736: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1737: unless ($fpath eq '') {
1738: my @parts=split('/',$fpath);
1739: foreach my $part (@parts) {
1740: $filepath.= '/'.$part;
1741: if ((-e $filepath)!=1) {
1742: mkdir($filepath,0777);
1743: }
1744: }
1745: }
1746: return $filepath;
1747: }
1748:
1749: sub store_edited_file {
1750: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1751: my $file = $primary_url;
1752: $file =~ s#^/uploaded/$docudom/$docuname/##;
1753: my $fpath = '';
1754: my $fname = $file;
1755: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1756: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1757: my $filepath = &build_filepath($fpath);
1758: open(my $fh,'>'.$filepath.'/'.$fname);
1759: print $fh $content;
1760: close($fh);
1761: my $home=&homeserver($docuname,$docudom);
1762: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1763: $home);
1764: if ($$fetchresult eq 'ok') {
1765: return '/uploaded/'.$fpath.'/'.$fname;
1766: } else {
1767: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1768: ' to host '.$home.': '.$$fetchresult);
1769: return '/adm/notfound.html';
1770: }
1771: }
1772:
1773: sub clean_filename {
1774: my ($fname,$args)=@_;
1775: # Replace Windows backslashes by forward slashes
1776: $fname=~s/\\/\//g;
1777: if (!$args->{'keep_path'}) {
1778: # Get rid of everything but the actual filename
1779: $fname=~s/^.*\/([^\/]+)$/$1/;
1780: }
1781: # Replace spaces by underscores
1782: $fname=~s/\s+/\_/g;
1783: # Replace all other weird characters by nothing
1784: $fname=~s{[^/\w\.\-]}{}g;
1785: # Replace all .\d. sequences with _\d. so they no longer look like version
1786: # numbers
1787: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1788: return $fname;
1789: }
1790:
1791: # --------------- Take an uploaded file and put it into the userfiles directory
1792: # input: $formname - the contents of the file are in $env{"form.$formname"}
1793: # the desired filenam is in $env{"form.$formname.filename"}
1794: # $coursedoc - if true up to the current course
1795: # if false
1796: # $subdir - directory in userfile to store the file into
1797: # $parser - instruction to parse file for objects ($parser = parse)
1798: # $allfiles - reference to hash for embedded objects
1799: # $codebase - reference to hash for codebase of java objects
1800: # $desuname - username for permanent storage of uploaded file
1801: # $dsetudom - domain for permanaent storage of uploaded file
1802: # $thumbwidth - width (pixels) of thumbnail to make for uploaded image
1803: # $thumbheight - height (pixels) of thumbnail to make for uploaded image
1804: #
1805: # output: url of file in userspace, or error: <message>
1806: # or /adm/notfound.html if failure to upload occurse
1807:
1808:
1809: sub userfileupload {
1810: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,
1811: $destudom,$thumbwidth,$thumbheight)=@_;
1812: if (!defined($subdir)) { $subdir='unknown'; }
1813: my $fname=$env{'form.'.$formname.'.filename'};
1814: $fname=&clean_filename($fname);
1815: # See if there is anything left
1816: unless ($fname) { return 'error: no uploaded file'; }
1817: chop($env{'form.'.$formname});
1818: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1819: my $now = time;
1820: my $filepath = 'tmp/helprequests/'.$now;
1821: my @parts=split(/\//,$filepath);
1822: my $fullpath = $perlvar{'lonDaemons'};
1823: for (my $i=0;$i<@parts;$i++) {
1824: $fullpath .= '/'.$parts[$i];
1825: if ((-e $fullpath)!=1) {
1826: mkdir($fullpath,0777);
1827: }
1828: }
1829: open(my $fh,'>'.$fullpath.'/'.$fname);
1830: print $fh $env{'form.'.$formname};
1831: close($fh);
1832: return $fullpath.'/'.$fname;
1833: } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
1834: my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
1835: '_'.$env{'user.domain'}.'/pending';
1836: my @parts=split(/\//,$filepath);
1837: my $fullpath = $perlvar{'lonDaemons'};
1838: for (my $i=0;$i<@parts;$i++) {
1839: $fullpath .= '/'.$parts[$i];
1840: if ((-e $fullpath)!=1) {
1841: mkdir($fullpath,0777);
1842: }
1843: }
1844: open(my $fh,'>'.$fullpath.'/'.$fname);
1845: print $fh $env{'form.'.$formname};
1846: close($fh);
1847: return $fullpath.'/'.$fname;
1848: }
1849:
1850: # Create the directory if not present
1851: $fname="$subdir/$fname";
1852: if ($coursedoc) {
1853: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1854: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1855: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1856: return &finishuserfileupload($docuname,$docudom,
1857: $formname,$fname,$parser,$allfiles,
1858: $codebase,$thumbwidth,$thumbheight);
1859: } else {
1860: $fname=$env{'form.folder'}.'/'.$fname;
1861: return &process_coursefile('uploaddoc',$docuname,$docudom,
1862: $fname,$formname,$parser,
1863: $allfiles,$codebase);
1864: }
1865: } elsif (defined($destuname)) {
1866: my $docuname=$destuname;
1867: my $docudom=$destudom;
1868: return &finishuserfileupload($docuname,$docudom,$formname,$fname,
1869: $parser,$allfiles,$codebase,
1870: $thumbwidth,$thumbheight);
1871:
1872: } else {
1873: my $docuname=$env{'user.name'};
1874: my $docudom=$env{'user.domain'};
1875: if (exists($env{'form.group'})) {
1876: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1877: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1878: }
1879: return &finishuserfileupload($docuname,$docudom,$formname,$fname,
1880: $parser,$allfiles,$codebase,
1881: $thumbwidth,$thumbheight);
1882: }
1883: }
1884:
1885: sub finishuserfileupload {
1886: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase,
1887: $thumbwidth,$thumbheight) = @_;
1888: my $path=$docudom.'/'.$docuname.'/';
1889: my $filepath=$perlvar{'lonDocRoot'};
1890: my ($fnamepath,$file,$fetchthumb);
1891: $file=$fname;
1892: if ($fname=~m|/|) {
1893: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1894: $path.=$fnamepath.'/';
1895: }
1896: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1897: my $count;
1898: for ($count=4;$count<=$#parts;$count++) {
1899: $filepath.="/$parts[$count]";
1900: if ((-e $filepath)!=1) {
1901: mkdir($filepath,0777);
1902: }
1903: }
1904: # Save the file
1905: {
1906: if (!open(FH,'>'.$filepath.'/'.$file)) {
1907: &logthis('Failed to create '.$filepath.'/'.$file);
1908: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1909: return '/adm/notfound.html';
1910: }
1911: if (!print FH ($env{'form.'.$formname})) {
1912: &logthis('Failed to write to '.$filepath.'/'.$file);
1913: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1914: return '/adm/notfound.html';
1915: }
1916: close(FH);
1917: }
1918: if ($parser eq 'parse') {
1919: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1920: $codebase);
1921: unless ($parse_result eq 'ok') {
1922: &logthis('Failed to parse '.$filepath.$file.
1923: ' for embedded media: '.$parse_result);
1924: }
1925: }
1926: if (($thumbwidth =~ /^\d+$/) && ($thumbheight =~ /^\d+$/)) {
1927: my $input = $filepath.'/'.$file;
1928: my $output = $filepath.'/'.'tn-'.$file;
1929: my $thumbsize = $thumbwidth.'x'.$thumbheight;
1930: system("convert -sample $thumbsize $input $output");
1931: if (-e $filepath.'/'.'tn-'.$file) {
1932: $fetchthumb = 1;
1933: }
1934: }
1935:
1936: # Notify homeserver to grep it
1937: #
1938: my $docuhome=&homeserver($docuname,$docudom);
1939: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1940: if ($fetchresult eq 'ok') {
1941: if ($fetchthumb) {
1942: my $thumbresult= &reply('fetchuserfile:'.$path.'tn-'.$file,$docuhome);
1943: if ($thumbresult ne 'ok') {
1944: &logthis('Failed to transfer '.$path.'tn-'.$file.' to host '.
1945: $docuhome.': '.$thumbresult);
1946: }
1947: }
1948: #
1949: # Return the URL to it
1950: return '/uploaded/'.$path.$file;
1951: } else {
1952: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1953: ': '.$fetchresult);
1954: return '/adm/notfound.html';
1955: }
1956: }
1957:
1958: sub extract_embedded_items {
1959: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1960: my @state = ();
1961: my %javafiles = (
1962: codebase => '',
1963: code => '',
1964: archive => ''
1965: );
1966: my %mediafiles = (
1967: src => '',
1968: movie => '',
1969: );
1970: my $p;
1971: if ($content) {
1972: $p = HTML::LCParser->new($content);
1973: } else {
1974: $p = HTML::LCParser->new($filepath.'/'.$file);
1975: }
1976: while (my $t=$p->get_token()) {
1977: if ($t->[0] eq 'S') {
1978: my ($tagname, $attr) = ($t->[1],$t->[2]);
1979: push(@state, $tagname);
1980: if (lc($tagname) eq 'allow') {
1981: &add_filetype($allfiles,$attr->{'src'},'src');
1982: }
1983: if (lc($tagname) eq 'img') {
1984: &add_filetype($allfiles,$attr->{'src'},'src');
1985: }
1986: if (lc($tagname) eq 'a') {
1987: &add_filetype($allfiles,$attr->{'href'},'href');
1988: }
1989: if (lc($tagname) eq 'script') {
1990: if ($attr->{'archive'} =~ /\.jar$/i) {
1991: &add_filetype($allfiles,$attr->{'archive'},'archive');
1992: } else {
1993: &add_filetype($allfiles,$attr->{'src'},'src');
1994: }
1995: }
1996: if (lc($tagname) eq 'link') {
1997: if (lc($attr->{'rel'}) eq 'stylesheet') {
1998: &add_filetype($allfiles,$attr->{'href'},'href');
1999: }
2000: }
2001: if (lc($tagname) eq 'object' ||
2002: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
2003: foreach my $item (keys(%javafiles)) {
2004: $javafiles{$item} = '';
2005: }
2006: }
2007: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
2008: my $name = lc($attr->{'name'});
2009: foreach my $item (keys(%javafiles)) {
2010: if ($name eq $item) {
2011: $javafiles{$item} = $attr->{'value'};
2012: last;
2013: }
2014: }
2015: foreach my $item (keys(%mediafiles)) {
2016: if ($name eq $item) {
2017: &add_filetype($allfiles, $attr->{'value'}, 'value');
2018: last;
2019: }
2020: }
2021: }
2022: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
2023: foreach my $item (keys(%javafiles)) {
2024: if ($attr->{$item}) {
2025: $javafiles{$item} = $attr->{$item};
2026: last;
2027: }
2028: }
2029: foreach my $item (keys(%mediafiles)) {
2030: if ($attr->{$item}) {
2031: &add_filetype($allfiles,$attr->{$item},$item);
2032: last;
2033: }
2034: }
2035: }
2036: } elsif ($t->[0] eq 'E') {
2037: my ($tagname) = ($t->[1]);
2038: if ($javafiles{'codebase'} ne '') {
2039: $javafiles{'codebase'} .= '/';
2040: }
2041: if (lc($tagname) eq 'applet' ||
2042: lc($tagname) eq 'object' ||
2043: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
2044: ) {
2045: foreach my $item (keys(%javafiles)) {
2046: if ($item ne 'codebase' && $javafiles{$item} ne '') {
2047: my $file=$javafiles{'codebase'}.$javafiles{$item};
2048: &add_filetype($allfiles,$file,$item);
2049: }
2050: }
2051: }
2052: pop @state;
2053: }
2054: }
2055: return 'ok';
2056: }
2057:
2058: sub add_filetype {
2059: my ($allfiles,$file,$type)=@_;
2060: if (exists($allfiles->{$file})) {
2061: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
2062: push(@{$allfiles->{$file}}, &escape($type));
2063: }
2064: } else {
2065: @{$allfiles->{$file}} = (&escape($type));
2066: }
2067: }
2068:
2069: sub removeuploadedurl {
2070: my ($url)=@_;
2071: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
2072: return &removeuserfile($uname,$udom,$fname);
2073: }
2074:
2075: sub removeuserfile {
2076: my ($docuname,$docudom,$fname)=@_;
2077: my $home=&homeserver($docuname,$docudom);
2078: my $result = &reply("removeuserfile:$docudom/$docuname/$fname",$home);
2079: if ($result eq 'ok') {
2080: if (($fname !~ /\.meta$/) && (&is_portfolio_file($fname))) {
2081: my $metafile = $fname.'.meta';
2082: my $metaresult = &removeuserfile($docuname,$docudom,$metafile);
2083: my $url = "/uploaded/$docudom/$docuname/$fname";
2084: my ($file,$group) = (&parse_portfolio_url($url))[3,4];
2085: my $sqlresult =
2086: &update_portfolio_table($docuname,$docudom,$file,
2087: 'portfolio_metadata',$group,
2088: 'delete');
2089: }
2090: }
2091: return $result;
2092: }
2093:
2094: sub mkdiruserfile {
2095: my ($docuname,$docudom,$dir)=@_;
2096: my $home=&homeserver($docuname,$docudom);
2097: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
2098: }
2099:
2100: sub renameuserfile {
2101: my ($docuname,$docudom,$old,$new)=@_;
2102: my $home=&homeserver($docuname,$docudom);
2103: my $result = &reply("renameuserfile:$docudom:$docuname:".
2104: &escape("$old").':'.&escape("$new"),$home);
2105: if ($result eq 'ok') {
2106: if (($old !~ /\.meta$/) && (&is_portfolio_file($old))) {
2107: my $oldmeta = $old.'.meta';
2108: my $newmeta = $new.'.meta';
2109: my $metaresult =
2110: &renameuserfile($docuname,$docudom,$oldmeta,$newmeta);
2111: my $url = "/uploaded/$docudom/$docuname/$old";
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: # ------------------------------------------------------------------------- Log
2123:
2124: sub log {
2125: my ($dom,$nam,$hom,$what)=@_;
2126: return critical("log:$dom:$nam:$what",$hom);
2127: }
2128:
2129: # ------------------------------------------------------------------ Course Log
2130: #
2131: # This routine flushes several buffers of non-mission-critical nature
2132: #
2133:
2134: sub flushcourselogs {
2135: &logthis('Flushing log buffers');
2136: #
2137: # course logs
2138: # This is a log of all transactions in a course, which can be used
2139: # for data mining purposes
2140: #
2141: # It also collects the courseid database, which lists last transaction
2142: # times and course titles for all courseids
2143: #
2144: my %courseidbuffer=();
2145: foreach my $crsid (keys %courselogs) {
2146: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
2147: &escape($courselogs{$crsid}),
2148: $coursehombuf{$crsid}) eq 'ok') {
2149: delete $courselogs{$crsid};
2150: } else {
2151: &logthis('Failed to flush log buffer for '.$crsid);
2152: if (length($courselogs{$crsid})>40000) {
2153: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
2154: " exceeded maximum size, deleting.</font>");
2155: delete $courselogs{$crsid};
2156: }
2157: }
2158: if ($courseidbuffer{$coursehombuf{$crsid}}) {
2159: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
2160: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
2161: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
2162: } else {
2163: $courseidbuffer{$coursehombuf{$crsid}}=
2164: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
2165: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
2166: }
2167: }
2168: #
2169: # Write course id database (reverse lookup) to homeserver of courses
2170: # Is used in pickcourse
2171: #
2172: foreach my $crs_home (keys(%courseidbuffer)) {
2173: &courseidput(&host_domain($crs_home),$courseidbuffer{$crs_home},
2174: $crs_home);
2175: }
2176: #
2177: # File accesses
2178: # Writes to the dynamic metadata of resources to get hit counts, etc.
2179: #
2180: foreach my $entry (keys(%accesshash)) {
2181: if ($entry =~ /___count$/) {
2182: my ($dom,$name);
2183: ($dom,$name,undef)=
2184: ($entry=~m{___($match_domain)/($match_name)/(.*)___count$});
2185: if (! defined($dom) || $dom eq '' ||
2186: ! defined($name) || $name eq '') {
2187: my $cid = $env{'request.course.id'};
2188: $dom = $env{'request.'.$cid.'.domain'};
2189: $name = $env{'request.'.$cid.'.num'};
2190: }
2191: my $value = $accesshash{$entry};
2192: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
2193: my %temphash=($url => $value);
2194: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
2195: if ($result eq 'ok') {
2196: delete $accesshash{$entry};
2197: } elsif ($result eq 'unknown_cmd') {
2198: # Target server has old code running on it.
2199: my %temphash=($entry => $value);
2200: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
2201: delete $accesshash{$entry};
2202: }
2203: }
2204: } else {
2205: my ($dom,$name) = ($entry=~m{___($match_domain)/($match_name)/(.*)___(\w+)$});
2206: my %temphash=($entry => $accesshash{$entry});
2207: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
2208: delete $accesshash{$entry};
2209: }
2210: }
2211: }
2212: #
2213: # Roles
2214: # Reverse lookup of user roles for course faculty/staff and co-authorship
2215: #
2216: foreach my $entry (keys(%userrolehash)) {
2217: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
2218: split(/\:/,$entry);
2219: if (&Apache::lonnet::put('nohist_userroles',
2220: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
2221: $rudom,$runame) eq 'ok') {
2222: delete $userrolehash{$entry};
2223: }
2224: }
2225: #
2226: # Reverse lookup of domain roles (dc, ad, li, sc, au)
2227: #
2228: my %domrolebuffer = ();
2229: foreach my $entry (keys %domainrolehash) {
2230: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split(/:/,$entry);
2231: if ($domrolebuffer{$rudom}) {
2232: $domrolebuffer{$rudom}.='&'.&escape($entry).
2233: '='.&escape($domainrolehash{$entry});
2234: } else {
2235: $domrolebuffer{$rudom}.=&escape($entry).
2236: '='.&escape($domainrolehash{$entry});
2237: }
2238: delete $domainrolehash{$entry};
2239: }
2240: foreach my $dom (keys(%domrolebuffer)) {
2241: my %servers = &get_servers($dom,'library');
2242: foreach my $tryserver (keys(%servers)) {
2243: unless (&reply('domroleput:'.$dom.':'.
2244: $domrolebuffer{$dom},$tryserver) eq 'ok') {
2245: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
2246: }
2247: }
2248: }
2249: $dumpcount++;
2250: }
2251:
2252: sub courselog {
2253: my $what=shift;
2254: $what=time.':'.$what;
2255: unless ($env{'request.course.id'}) { return ''; }
2256: $coursedombuf{$env{'request.course.id'}}=
2257: $env{'course.'.$env{'request.course.id'}.'.domain'};
2258: $coursenumbuf{$env{'request.course.id'}}=
2259: $env{'course.'.$env{'request.course.id'}.'.num'};
2260: $coursehombuf{$env{'request.course.id'}}=
2261: $env{'course.'.$env{'request.course.id'}.'.home'};
2262: $coursedescrbuf{$env{'request.course.id'}}=
2263: $env{'course.'.$env{'request.course.id'}.'.description'};
2264: $courseinstcodebuf{$env{'request.course.id'}}=
2265: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
2266: $courseownerbuf{$env{'request.course.id'}}=
2267: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
2268: $coursetypebuf{$env{'request.course.id'}}=
2269: $env{'course.'.$env{'request.course.id'}.'.type'};
2270: if (defined $courselogs{$env{'request.course.id'}}) {
2271: $courselogs{$env{'request.course.id'}}.='&'.$what;
2272: } else {
2273: $courselogs{$env{'request.course.id'}}.=$what;
2274: }
2275: if (length($courselogs{$env{'request.course.id'}})>4048) {
2276: &flushcourselogs();
2277: }
2278: }
2279:
2280: sub courseacclog {
2281: my $fnsymb=shift;
2282: unless ($env{'request.course.id'}) { return ''; }
2283: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
2284: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
2285: $what.=':POST';
2286: # FIXME: Probably ought to escape things....
2287: foreach my $key (keys(%env)) {
2288: if ($key=~/^form\.(.*)/) {
2289: $what.=':'.$1.'='.$env{$key};
2290: }
2291: }
2292: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
2293: # FIXME: We should not be depending on a form parameter that someone
2294: # editing lonsearchcat.pm might change in the future.
2295: if ($env{'form.phase'} eq 'course_search') {
2296: $what.= ':POST';
2297: # FIXME: Probably ought to escape things....
2298: foreach my $element ('courseexp','crsfulltext','crsrelated',
2299: 'crsdiscuss') {
2300: $what.=':'.$element.'='.$env{'form.'.$element};
2301: }
2302: }
2303: }
2304: &courselog($what);
2305: }
2306:
2307: sub countacc {
2308: my $url=&declutter(shift);
2309: return if (! defined($url) || $url eq '');
2310: unless ($env{'request.course.id'}) { return ''; }
2311: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
2312: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
2313: $accesshash{$key}++;
2314: }
2315:
2316: sub linklog {
2317: my ($from,$to)=@_;
2318: $from=&declutter($from);
2319: $to=&declutter($to);
2320: $accesshash{$from.'___'.$to.'___comefrom'}=1;
2321: $accesshash{$to.'___'.$from.'___goto'}=1;
2322: }
2323:
2324: sub userrolelog {
2325: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
2326: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
2327: ($trole=~/^in/) || ($trole=~/^cc/) ||
2328: ($trole=~/^ep/) || ($trole=~/^cr/) ||
2329: ($trole=~/^ta/)) {
2330: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2331: $userrolehash
2332: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2333: =$tend.':'.$tstart;
2334: }
2335: if (($env{'request.role'} =~ /dc\./) &&
2336: (($trole=~/^au/) || ($trole=~/^in/) ||
2337: ($trole=~/^cc/) || ($trole=~/^ep/) ||
2338: ($trole=~/^cr/) || ($trole=~/^ta/))) {
2339: $userrolehash
2340: {$trole.':'.$username.':'.$domain.':'.$env{'user.name'}.':'.$env{'user.domain'}.':'}
2341: =$tend.':'.$tstart;
2342: }
2343: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
2344: ($trole=~/^li/) || ($trole=~/^li/) ||
2345: ($trole=~/^au/) || ($trole=~/^dg/) ||
2346: ($trole=~/^sc/)) {
2347: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
2348: $domainrolehash
2349: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
2350: = $tend.':'.$tstart;
2351: }
2352: }
2353:
2354: sub get_course_adv_roles {
2355: my $cid=shift;
2356: $cid=$env{'request.course.id'} unless (defined($cid));
2357: my %coursehash=&coursedescription($cid);
2358: my %nothide=();
2359: foreach my $user (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
2360: $nothide{join(':',split(/[\@\:]/,$user))}=1;
2361: }
2362: my %returnhash=();
2363: my %dumphash=
2364: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
2365: my $now=time;
2366: foreach my $entry (keys %dumphash) {
2367: my ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2368: if (($tstart) && ($tstart<0)) { next; }
2369: if (($tend) && ($tend<$now)) { next; }
2370: if (($tstart) && ($now<$tstart)) { next; }
2371: my ($role,$username,$domain,$section)=split(/\:/,$entry);
2372: if ($username eq '' || $domain eq '') { next; }
2373: if ((&privileged($username,$domain)) &&
2374: (!$nothide{$username.':'.$domain})) { next; }
2375: if ($role eq 'cr') { next; }
2376: my $key=&plaintext($role);
2377: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
2378: if ($returnhash{$key}) {
2379: $returnhash{$key}.=','.$username.':'.$domain;
2380: } else {
2381: $returnhash{$key}=$username.':'.$domain;
2382: }
2383: }
2384: return %returnhash;
2385: }
2386:
2387: sub get_my_roles {
2388: my ($uname,$udom,$context,$types,$roles,$roledoms)=@_;
2389: unless (defined($uname)) { $uname=$env{'user.name'}; }
2390: unless (defined($udom)) { $udom=$env{'user.domain'}; }
2391: my %dumphash;
2392: if ($context eq 'userroles') {
2393: %dumphash = &dump('roles',$udom,$uname);
2394: } else {
2395: %dumphash=
2396: &dump('nohist_userroles',$udom,$uname);
2397: }
2398: my %returnhash=();
2399: my $now=time;
2400: foreach my $entry (keys(%dumphash)) {
2401: my ($role,$tend,$tstart);
2402: if ($context eq 'userroles') {
2403: ($role,$tend,$tstart)=split(/_/,$dumphash{$entry});
2404: } else {
2405: ($tend,$tstart)=split(/\:/,$dumphash{$entry});
2406: }
2407: if (($tstart) && ($tstart<0)) { next; }
2408: my $status = 'active';
2409: if (($tend) && ($tend<$now)) {
2410: $status = 'previous';
2411: }
2412: if (($tstart) && ($now<$tstart)) {
2413: $status = 'future';
2414: }
2415: if (ref($types) eq 'ARRAY') {
2416: if (!grep(/^\Q$status\E$/,@{$types})) {
2417: next;
2418: }
2419: } else {
2420: if ($status ne 'active') {
2421: next;
2422: }
2423: }
2424: my ($rolecode,$username,$domain,$section,$area);
2425: if ($context eq 'userroles') {
2426: ($area,$rolecode) = split(/_/,$entry);
2427: (undef,$domain,$username,$section) = split(/\//,$area);
2428: } else {
2429: ($role,$username,$domain,$section) = split(/\:/,$entry);
2430: }
2431: if (ref($roledoms) eq 'ARRAY') {
2432: if (!grep(/^\Q$domain\E$/,@{$roledoms})) {
2433: next;
2434: }
2435: }
2436: if (ref($roles) eq 'ARRAY') {
2437: if (!grep(/^\Q$role\E$/,@{$roles})) {
2438: next;
2439: }
2440: }
2441: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
2442: }
2443: return %returnhash;
2444: }
2445:
2446: # ----------------------------------------------------- Frontpage Announcements
2447: #
2448: #
2449:
2450: sub postannounce {
2451: my ($server,$text)=@_;
2452: unless (&allowed('psa',&host_domain($server))) { return 'refused'; }
2453: unless ($text=~/\w/) { $text=''; }
2454: return &reply('setannounce:'.&escape($text),$server);
2455: }
2456:
2457: sub getannounce {
2458:
2459: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
2460: my $announcement='';
2461: while (my $line = <$fh>) { $announcement .= $line; }
2462: close($fh);
2463: if ($announcement=~/\w/) {
2464: return
2465: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
2466: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
2467: } else {
2468: return '';
2469: }
2470: } else {
2471: return '';
2472: }
2473: }
2474:
2475: # ---------------------------------------------------------- Course ID routines
2476: # Deal with domain's nohist_courseid.db files
2477: #
2478:
2479: sub courseidput {
2480: my ($domain,$what,$coursehome)=@_;
2481: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
2482: }
2483:
2484: sub courseiddump {
2485: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref,$typefilter,$regexp_ok)=@_;
2486: my %returnhash=();
2487: unless ($domfilter) { $domfilter=''; }
2488: my %libserv = &all_library();
2489: foreach my $tryserver (keys(%libserv)) {
2490: if ( ( $hostidflag == 1
2491: && grep(/^\Q$tryserver\E$/,@{$hostidref}) )
2492: || (!defined($hostidflag)) ) {
2493:
2494: if ($domfilter eq ''
2495: || (&host_domain($tryserver) eq $domfilter)) {
2496: foreach my $line (
2497: split(/\&/,&reply('courseiddump:'.&host_domain($tryserver).':'.
2498: $sincefilter.':'.&escape($descfilter).':'.
2499: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter).':'.&escape($typefilter).':'.&escape($regexp_ok),
2500: $tryserver))) {
2501: my ($key,$value)=split(/\=/,$line,2);
2502: if (($key) && ($value)) {
2503: $returnhash{&unescape($key)}=$value;
2504: }
2505: }
2506: }
2507: }
2508: }
2509: return %returnhash;
2510: }
2511:
2512: # ---------------------------------------------------------- DC e-mail
2513:
2514: sub dcmailput {
2515: my ($domain,$msgid,$message,$server)=@_;
2516: my $status = &Apache::lonnet::critical(
2517: 'dcmailput:'.$domain.':'.&escape($msgid).'='.
2518: &escape($message),$server);
2519: return $status;
2520: }
2521:
2522: sub dcmaildump {
2523: my ($dom,$startdate,$enddate,$senders) = @_;
2524: my %returnhash=();
2525:
2526: if (defined(&domain($dom,'primary'))) {
2527: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
2528: &escape($enddate).':';
2529: my @esc_senders=map { &escape($_)} @$senders;
2530: $cmd.=&escape(join('&',@esc_senders));
2531: foreach my $line (split(/\&/,&reply($cmd,&domain($dom,'primary')))) {
2532: my ($key,$value) = split(/\=/,$line,2);
2533: if (($key) && ($value)) {
2534: $returnhash{&unescape($key)} = &unescape($value);
2535: }
2536: }
2537: }
2538: return %returnhash;
2539: }
2540: # ---------------------------------------------------------- Domain roles
2541:
2542: sub get_domain_roles {
2543: my ($dom,$roles,$startdate,$enddate)=@_;
2544: if (undef($startdate) || $startdate eq '') {
2545: $startdate = '.';
2546: }
2547: if (undef($enddate) || $enddate eq '') {
2548: $enddate = '.';
2549: }
2550: my $rolelist = join(':',@{$roles});
2551: my %personnel = ();
2552:
2553: my %servers = &get_servers($dom,'library');
2554: foreach my $tryserver (keys(%servers)) {
2555: %{$personnel{$tryserver}}=();
2556: foreach my $line (split(/\&/,&reply('domrolesdump:'.$dom.':'.
2557: &escape($startdate).':'.
2558: &escape($enddate).':'.
2559: &escape($rolelist), $tryserver))) {
2560: my ($key,$value) = split(/\=/,$line,2);
2561: if (($key) && ($value)) {
2562: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2563: }
2564: }
2565: }
2566: return %personnel;
2567: }
2568:
2569: # ----------------------------------------------------------- Check out an item
2570:
2571: sub get_first_access {
2572: my ($type,$argsymb)=@_;
2573: my ($symb,$courseid,$udom,$uname)=&whichuser();
2574: if ($argsymb) { $symb=$argsymb; }
2575: my ($map,$id,$res)=&decode_symb($symb);
2576: if ($type eq 'map') {
2577: $res=&symbread($map);
2578: } else {
2579: $res=$symb;
2580: }
2581: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2582: return $times{"$courseid\0$res"};
2583: }
2584:
2585: sub set_first_access {
2586: my ($type)=@_;
2587: my ($symb,$courseid,$udom,$uname)=&whichuser();
2588: my ($map,$id,$res)=&decode_symb($symb);
2589: if ($type eq 'map') {
2590: $res=&symbread($map);
2591: } else {
2592: $res=$symb;
2593: }
2594: my $firstaccess=&get_first_access($type,$symb);
2595: if (!$firstaccess) {
2596: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2597: }
2598: return 'already_set';
2599: }
2600:
2601: sub checkout {
2602: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2603: my $now=time;
2604: my $lonhost=$perlvar{'lonHostID'};
2605: my $infostr=&escape(
2606: 'CHECKOUTTOKEN&'.
2607: $tuname.'&'.
2608: $tudom.'&'.
2609: $tcrsid.'&'.
2610: $symb.'&'.
2611: $now.'&'.$ENV{'REMOTE_ADDR'});
2612: my $token=&reply('tmpput:'.$infostr,$lonhost);
2613: if ($token=~/^error\:/) {
2614: &logthis("<font color=\"blue\">WARNING: ".
2615: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2616: "</font>");
2617: return '';
2618: }
2619:
2620: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2621: $token=~tr/a-z/A-Z/;
2622:
2623: my %infohash=('resource.0.outtoken' => $token,
2624: 'resource.0.checkouttime' => $now,
2625: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2626:
2627: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2628: return '';
2629: } else {
2630: &logthis("<font color=\"blue\">WARNING: ".
2631: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2632: "</font>");
2633: }
2634:
2635: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2636: &escape('Checkout '.$infostr.' - '.
2637: $token)) ne 'ok') {
2638: return '';
2639: } else {
2640: &logthis("<font color=\"blue\">WARNING: ".
2641: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2642: "</font>");
2643: }
2644: return $token;
2645: }
2646:
2647: # ------------------------------------------------------------ Check in an item
2648:
2649: sub checkin {
2650: my $token=shift;
2651: my $now=time;
2652: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2653: $lonhost=~tr/A-Z/a-z/;
2654: my $dtoken=$ta.'_'.&hostname($lonhost).'_'.$tb;
2655: $dtoken=~s/\W/\_/g;
2656: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2657: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2658:
2659: unless (($tuname) && ($tudom)) {
2660: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2661: return '';
2662: }
2663:
2664: unless (&allowed('mgr',$tcrsid)) {
2665: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2666: $env{'user.name'}.' - '.$env{'user.domain'});
2667: return '';
2668: }
2669:
2670: my %infohash=('resource.0.intoken' => $token,
2671: 'resource.0.checkintime' => $now,
2672: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2673:
2674: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2675: return '';
2676: }
2677:
2678: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2679: &escape('Checkin - '.$token)) ne 'ok') {
2680: return '';
2681: }
2682:
2683: return ($symb,$tuname,$tudom,$tcrsid);
2684: }
2685:
2686: # --------------------------------------------- Set Expire Date for Spreadsheet
2687:
2688: sub expirespread {
2689: my ($uname,$udom,$stype,$usymb)=@_;
2690: my $cid=$env{'request.course.id'};
2691: if ($cid) {
2692: my $now=time;
2693: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2694: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2695: $env{'course.'.$cid.'.num'}.
2696: ':nohist_expirationdates:'.
2697: &escape($key).'='.$now,
2698: $env{'course.'.$cid.'.home'})
2699: }
2700: return 'ok';
2701: }
2702:
2703: # ----------------------------------------------------- Devalidate Spreadsheets
2704:
2705: sub devalidate {
2706: my ($symb,$uname,$udom)=@_;
2707: my $cid=$env{'request.course.id'};
2708: if ($cid) {
2709: # delete the stored spreadsheets for
2710: # - the student level sheet of this user in course's homespace
2711: # - the assessment level sheet for this resource
2712: # for this user in user's homespace
2713: # - current conditional state info
2714: my $key=$uname.':'.$udom.':';
2715: my $status=
2716: &del('nohist_calculatedsheets',
2717: [$key.'studentcalc:'],
2718: $env{'course.'.$cid.'.domain'},
2719: $env{'course.'.$cid.'.num'})
2720: .' '.
2721: &del('nohist_calculatedsheets_'.$cid,
2722: [$key.'assesscalc:'.$symb],$udom,$uname);
2723: unless ($status eq 'ok ok') {
2724: &logthis('Could not devalidate spreadsheet '.
2725: $uname.' at '.$udom.' for '.
2726: $symb.': '.$status);
2727: }
2728: &delenv('user.state.'.$cid);
2729: }
2730: }
2731:
2732: sub get_scalar {
2733: my ($string,$end) = @_;
2734: my $value;
2735: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2736: $value = $1;
2737: } elsif ($$string =~ s/^([^&]*?)&//) {
2738: $value = $1;
2739: }
2740: return &unescape($value);
2741: }
2742:
2743: sub array2str {
2744: my (@array) = @_;
2745: my $result=&arrayref2str(\@array);
2746: $result=~s/^__ARRAY_REF__//;
2747: $result=~s/__END_ARRAY_REF__$//;
2748: return $result;
2749: }
2750:
2751: sub arrayref2str {
2752: my ($arrayref) = @_;
2753: my $result='__ARRAY_REF__';
2754: foreach my $elem (@$arrayref) {
2755: if(ref($elem) eq 'ARRAY') {
2756: $result.=&arrayref2str($elem).'&';
2757: } elsif(ref($elem) eq 'HASH') {
2758: $result.=&hashref2str($elem).'&';
2759: } elsif(ref($elem)) {
2760: #print("Got a ref of ".(ref($elem))." skipping.");
2761: } else {
2762: $result.=&escape($elem).'&';
2763: }
2764: }
2765: $result=~s/\&$//;
2766: $result .= '__END_ARRAY_REF__';
2767: return $result;
2768: }
2769:
2770: sub hash2str {
2771: my (%hash) = @_;
2772: my $result=&hashref2str(\%hash);
2773: $result=~s/^__HASH_REF__//;
2774: $result=~s/__END_HASH_REF__$//;
2775: return $result;
2776: }
2777:
2778: sub hashref2str {
2779: my ($hashref)=@_;
2780: my $result='__HASH_REF__';
2781: foreach my $key (sort(keys(%$hashref))) {
2782: if (ref($key) eq 'ARRAY') {
2783: $result.=&arrayref2str($key).'=';
2784: } elsif (ref($key) eq 'HASH') {
2785: $result.=&hashref2str($key).'=';
2786: } elsif (ref($key)) {
2787: $result.='=';
2788: #print("Got a ref of ".(ref($key))." skipping.");
2789: } else {
2790: if ($key) {$result.=&escape($key).'=';} else { last; }
2791: }
2792:
2793: if(ref($hashref->{$key}) eq 'ARRAY') {
2794: $result.=&arrayref2str($hashref->{$key}).'&';
2795: } elsif(ref($hashref->{$key}) eq 'HASH') {
2796: $result.=&hashref2str($hashref->{$key}).'&';
2797: } elsif(ref($hashref->{$key})) {
2798: $result.='&';
2799: #print("Got a ref of ".(ref($hashref->{$key}))." skipping.");
2800: } else {
2801: $result.=&escape($hashref->{$key}).'&';
2802: }
2803: }
2804: $result=~s/\&$//;
2805: $result .= '__END_HASH_REF__';
2806: return $result;
2807: }
2808:
2809: sub str2hash {
2810: my ($string)=@_;
2811: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2812: return %$hash;
2813: }
2814:
2815: sub str2hashref {
2816: my ($string) = @_;
2817:
2818: my %hash;
2819:
2820: if($string !~ /^__HASH_REF__/) {
2821: if (! ($string eq '' || !defined($string))) {
2822: $hash{'error'}='Not hash reference';
2823: }
2824: return (\%hash, $string);
2825: }
2826:
2827: $string =~ s/^__HASH_REF__//;
2828:
2829: while($string !~ /^__END_HASH_REF__/) {
2830: #key
2831: my $key='';
2832: if($string =~ /^__HASH_REF__/) {
2833: ($key, $string)=&str2hashref($string);
2834: if(defined($key->{'error'})) {
2835: $hash{'error'}='Bad data';
2836: return (\%hash, $string);
2837: }
2838: } elsif($string =~ /^__ARRAY_REF__/) {
2839: ($key, $string)=&str2arrayref($string);
2840: if($key->[0] eq 'Array reference error') {
2841: $hash{'error'}='Bad data';
2842: return (\%hash, $string);
2843: }
2844: } else {
2845: $string =~ s/^(.*?)=//;
2846: $key=&unescape($1);
2847: }
2848: $string =~ s/^=//;
2849:
2850: #value
2851: my $value='';
2852: if($string =~ /^__HASH_REF__/) {
2853: ($value, $string)=&str2hashref($string);
2854: if(defined($value->{'error'})) {
2855: $hash{'error'}='Bad data';
2856: return (\%hash, $string);
2857: }
2858: } elsif($string =~ /^__ARRAY_REF__/) {
2859: ($value, $string)=&str2arrayref($string);
2860: if($value->[0] eq 'Array reference error') {
2861: $hash{'error'}='Bad data';
2862: return (\%hash, $string);
2863: }
2864: } else {
2865: $value=&get_scalar(\$string,'__END_HASH_REF__');
2866: }
2867: $string =~ s/^&//;
2868:
2869: $hash{$key}=$value;
2870: }
2871:
2872: $string =~ s/^__END_HASH_REF__//;
2873:
2874: return (\%hash, $string);
2875: }
2876:
2877: sub str2array {
2878: my ($string)=@_;
2879: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2880: return @$array;
2881: }
2882:
2883: sub str2arrayref {
2884: my ($string) = @_;
2885: my @array;
2886:
2887: if($string !~ /^__ARRAY_REF__/) {
2888: if (! ($string eq '' || !defined($string))) {
2889: $array[0]='Array reference error';
2890: }
2891: return (\@array, $string);
2892: }
2893:
2894: $string =~ s/^__ARRAY_REF__//;
2895:
2896: while($string !~ /^__END_ARRAY_REF__/) {
2897: my $value='';
2898: if($string =~ /^__HASH_REF__/) {
2899: ($value, $string)=&str2hashref($string);
2900: if(defined($value->{'error'})) {
2901: $array[0] ='Array reference error';
2902: return (\@array, $string);
2903: }
2904: } elsif($string =~ /^__ARRAY_REF__/) {
2905: ($value, $string)=&str2arrayref($string);
2906: if($value->[0] eq 'Array reference error') {
2907: $array[0] ='Array reference error';
2908: return (\@array, $string);
2909: }
2910: } else {
2911: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2912: }
2913: $string =~ s/^&//;
2914:
2915: push(@array, $value);
2916: }
2917:
2918: $string =~ s/^__END_ARRAY_REF__//;
2919:
2920: return (\@array, $string);
2921: }
2922:
2923: # -------------------------------------------------------------------Temp Store
2924:
2925: sub tmpreset {
2926: my ($symb,$namespace,$domain,$stuname) = @_;
2927: if (!$symb) {
2928: $symb=&symbread();
2929: if (!$symb) { $symb= $env{'request.url'}; }
2930: }
2931: $symb=escape($symb);
2932:
2933: if (!$namespace) { $namespace=$env{'request.state'}; }
2934: $namespace=~s/\//\_/g;
2935: $namespace=~s/\W//g;
2936:
2937: if (!$domain) { $domain=$env{'user.domain'}; }
2938: if (!$stuname) { $stuname=$env{'user.name'}; }
2939: if ($domain eq 'public' && $stuname eq 'public') {
2940: $stuname=$ENV{'REMOTE_ADDR'};
2941: }
2942: my $path=$perlvar{'lonDaemons'}.'/tmp';
2943: my %hash;
2944: if (tie(%hash,'GDBM_File',
2945: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2946: &GDBM_WRCREAT(),0640)) {
2947: foreach my $key (keys %hash) {
2948: if ($key=~ /:$symb/) {
2949: delete($hash{$key});
2950: }
2951: }
2952: }
2953: }
2954:
2955: sub tmpstore {
2956: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2957:
2958: if (!$symb) {
2959: $symb=&symbread();
2960: if (!$symb) { $symb= $env{'request.url'}; }
2961: }
2962: $symb=escape($symb);
2963:
2964: if (!$namespace) {
2965: # I don't think we would ever want to store this for a course.
2966: # it seems this will only be used if we don't have a course.
2967: #$namespace=$env{'request.course.id'};
2968: #if (!$namespace) {
2969: $namespace=$env{'request.state'};
2970: #}
2971: }
2972: $namespace=~s/\//\_/g;
2973: $namespace=~s/\W//g;
2974: if (!$domain) { $domain=$env{'user.domain'}; }
2975: if (!$stuname) { $stuname=$env{'user.name'}; }
2976: if ($domain eq 'public' && $stuname eq 'public') {
2977: $stuname=$ENV{'REMOTE_ADDR'};
2978: }
2979: my $now=time;
2980: my %hash;
2981: my $path=$perlvar{'lonDaemons'}.'/tmp';
2982: if (tie(%hash,'GDBM_File',
2983: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2984: &GDBM_WRCREAT(),0640)) {
2985: $hash{"version:$symb"}++;
2986: my $version=$hash{"version:$symb"};
2987: my $allkeys='';
2988: foreach my $key (keys(%$storehash)) {
2989: $allkeys.=$key.':';
2990: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2991: }
2992: $hash{"$version:$symb:timestamp"}=$now;
2993: $allkeys.='timestamp';
2994: $hash{"$version:keys:$symb"}=$allkeys;
2995: if (untie(%hash)) {
2996: return 'ok';
2997: } else {
2998: return "error:$!";
2999: }
3000: } else {
3001: return "error:$!";
3002: }
3003: }
3004:
3005: # -----------------------------------------------------------------Temp Restore
3006:
3007: sub tmprestore {
3008: my ($symb,$namespace,$domain,$stuname) = @_;
3009:
3010: if (!$symb) {
3011: $symb=&symbread();
3012: if (!$symb) { $symb= $env{'request.url'}; }
3013: }
3014: $symb=escape($symb);
3015:
3016: if (!$namespace) { $namespace=$env{'request.state'}; }
3017:
3018: if (!$domain) { $domain=$env{'user.domain'}; }
3019: if (!$stuname) { $stuname=$env{'user.name'}; }
3020: if ($domain eq 'public' && $stuname eq 'public') {
3021: $stuname=$ENV{'REMOTE_ADDR'};
3022: }
3023: my %returnhash;
3024: $namespace=~s/\//\_/g;
3025: $namespace=~s/\W//g;
3026: my %hash;
3027: my $path=$perlvar{'lonDaemons'}.'/tmp';
3028: if (tie(%hash,'GDBM_File',
3029: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
3030: &GDBM_READER(),0640)) {
3031: my $version=$hash{"version:$symb"};
3032: $returnhash{'version'}=$version;
3033: my $scope;
3034: for ($scope=1;$scope<=$version;$scope++) {
3035: my $vkeys=$hash{"$scope:keys:$symb"};
3036: my @keys=split(/:/,$vkeys);
3037: my $key;
3038: $returnhash{"$scope:keys"}=$vkeys;
3039: foreach $key (@keys) {
3040: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
3041: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
3042: }
3043: }
3044: if (!(untie(%hash))) {
3045: return "error:$!";
3046: }
3047: } else {
3048: return "error:$!";
3049: }
3050: return %returnhash;
3051: }
3052:
3053: # ----------------------------------------------------------------------- Store
3054:
3055: sub store {
3056: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
3057: my $home='';
3058:
3059: if ($stuname) { $home=&homeserver($stuname,$domain); }
3060:
3061: $symb=&symbclean($symb);
3062: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
3063:
3064: if (!$domain) { $domain=$env{'user.domain'}; }
3065: if (!$stuname) { $stuname=$env{'user.name'}; }
3066:
3067: &devalidate($symb,$stuname,$domain);
3068:
3069: $symb=escape($symb);
3070: if (!$namespace) {
3071: unless ($namespace=$env{'request.course.id'}) {
3072: return '';
3073: }
3074: }
3075: if (!$home) { $home=$env{'user.home'}; }
3076:
3077: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
3078: $$storehash{'host'}=$perlvar{'lonHostID'};
3079:
3080: my $namevalue='';
3081: foreach my $key (keys(%$storehash)) {
3082: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3083: }
3084: $namevalue=~s/\&$//;
3085: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
3086: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
3087: }
3088:
3089: # -------------------------------------------------------------- Critical Store
3090:
3091: sub cstore {
3092: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
3093: my $home='';
3094:
3095: if ($stuname) { $home=&homeserver($stuname,$domain); }
3096:
3097: $symb=&symbclean($symb);
3098: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
3099:
3100: if (!$domain) { $domain=$env{'user.domain'}; }
3101: if (!$stuname) { $stuname=$env{'user.name'}; }
3102:
3103: &devalidate($symb,$stuname,$domain);
3104:
3105: $symb=escape($symb);
3106: if (!$namespace) {
3107: unless ($namespace=$env{'request.course.id'}) {
3108: return '';
3109: }
3110: }
3111: if (!$home) { $home=$env{'user.home'}; }
3112:
3113: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
3114: $$storehash{'host'}=$perlvar{'lonHostID'};
3115:
3116: my $namevalue='';
3117: foreach my $key (keys(%$storehash)) {
3118: $namevalue.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3119: }
3120: $namevalue=~s/\&$//;
3121: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
3122: return critical
3123: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
3124: }
3125:
3126: # --------------------------------------------------------------------- Restore
3127:
3128: sub restore {
3129: my ($symb,$namespace,$domain,$stuname) = @_;
3130: my $home='';
3131:
3132: if ($stuname) { $home=&homeserver($stuname,$domain); }
3133:
3134: if (!$symb) {
3135: unless ($symb=escape(&symbread())) { return ''; }
3136: } else {
3137: $symb=&escape(&symbclean($symb));
3138: }
3139: if (!$namespace) {
3140: unless ($namespace=$env{'request.course.id'}) {
3141: return '';
3142: }
3143: }
3144: if (!$domain) { $domain=$env{'user.domain'}; }
3145: if (!$stuname) { $stuname=$env{'user.name'}; }
3146: if (!$home) { $home=$env{'user.home'}; }
3147: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
3148:
3149: my %returnhash=();
3150: foreach my $line (split(/\&/,$answer)) {
3151: my ($name,$value)=split(/\=/,$line);
3152: $returnhash{&unescape($name)}=&thaw_unescape($value);
3153: }
3154: my $version;
3155: for ($version=1;$version<=$returnhash{'version'};$version++) {
3156: foreach my $item (split(/\:/,$returnhash{$version.':keys'})) {
3157: $returnhash{$item}=$returnhash{$version.':'.$item};
3158: }
3159: }
3160: return %returnhash;
3161: }
3162:
3163: # ---------------------------------------------------------- Course Description
3164:
3165: sub coursedescription {
3166: my ($courseid,$args)=@_;
3167: $courseid=~s/^\///;
3168: $courseid=~s/\_/\//g;
3169: my ($cdomain,$cnum)=split(/\//,$courseid);
3170: my $chome=&homeserver($cnum,$cdomain);
3171: my $normalid=$cdomain.'_'.$cnum;
3172: # need to always cache even if we get errors otherwise we keep
3173: # trying and trying and trying to get the course description.
3174: my %envhash=();
3175: my %returnhash=();
3176:
3177: my $expiretime=600;
3178: if ($env{'request.course.id'} eq $normalid) {
3179: $expiretime=120;
3180: }
3181:
3182: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
3183: if (!$args->{'freshen_cache'}
3184: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
3185: foreach my $key (keys(%env)) {
3186: next if ($key !~ /^\Q$prefix\E(.*)/);
3187: my ($setting) = $1;
3188: $returnhash{$setting} = $env{$key};
3189: }
3190: return %returnhash;
3191: }
3192:
3193: # get the data agin
3194: if (!$args->{'one_time'}) {
3195: $envhash{'course.'.$normalid.'.last_cache'}=time;
3196: }
3197:
3198: if ($chome ne 'no_host') {
3199: %returnhash=&dump('environment',$cdomain,$cnum);
3200: if (!exists($returnhash{'con_lost'})) {
3201: $returnhash{'home'}= $chome;
3202: $returnhash{'domain'} = $cdomain;
3203: $returnhash{'num'} = $cnum;
3204: if (!defined($returnhash{'type'})) {
3205: $returnhash{'type'} = 'Course';
3206: }
3207: while (my ($name,$value) = each %returnhash) {
3208: $envhash{'course.'.$normalid.'.'.$name}=$value;
3209: }
3210: $returnhash{'url'}=&clutter($returnhash{'url'});
3211: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
3212: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
3213: $envhash{'course.'.$normalid.'.home'}=$chome;
3214: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
3215: $envhash{'course.'.$normalid.'.num'}=$cnum;
3216: }
3217: }
3218: if (!$args->{'one_time'}) {
3219: &appenv(%envhash);
3220: }
3221: return %returnhash;
3222: }
3223:
3224: # -------------------------------------------------See if a user is privileged
3225:
3226: sub privileged {
3227: my ($username,$domain)=@_;
3228: my $rolesdump=&reply("dump:$domain:$username:roles",
3229: &homeserver($username,$domain));
3230: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
3231: my $now=time;
3232: if ($rolesdump ne '') {
3233: foreach my $entry (split(/&/,$rolesdump)) {
3234: if ($entry!~/^rolesdef_/) {
3235: my ($area,$role)=split(/=/,$entry);
3236: $area=~s/\_\w\w$//;
3237: my ($trole,$tend,$tstart)=split(/_/,$role);
3238: if (($trole eq 'dc') || ($trole eq 'su')) {
3239: my $active=1;
3240: if ($tend) {
3241: if ($tend<$now) { $active=0; }
3242: }
3243: if ($tstart) {
3244: if ($tstart>$now) { $active=0; }
3245: }
3246: if ($active) { return 1; }
3247: }
3248: }
3249: }
3250: }
3251: return 0;
3252: }
3253:
3254: # -------------------------------------------------------- Get user privileges
3255:
3256: sub rolesinit {
3257: my ($domain,$username,$authhost)=@_;
3258: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
3259: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
3260: my %allroles=();
3261: my %allgroups=();
3262: my $now=time;
3263: my %userroles = ('user.login.time' => $now);
3264: my $group_privs;
3265:
3266: if ($rolesdump ne '') {
3267: foreach my $entry (split(/&/,$rolesdump)) {
3268: if ($entry!~/^rolesdef_/) {
3269: my ($area,$role)=split(/=/,$entry);
3270: $area=~s/\_\w\w$//;
3271: my ($trole,$tend,$tstart,$group_privs);
3272: if ($role=~/^cr/) {
3273: if ($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|) {
3274: ($trole,my $trest)=($role=~m|^(cr/$match_domain/$match_username/[a-zA-Z0-9]+)_(.*)$|);
3275: ($tend,$tstart)=split('_',$trest);
3276: } else {
3277: $trole=$role;
3278: }
3279: } elsif ($role =~ m|^gr/|) {
3280: ($trole,$tend,$tstart) = split(/_/,$role);
3281: ($trole,$group_privs) = split(/\//,$trole);
3282: $group_privs = &unescape($group_privs);
3283: } else {
3284: ($trole,$tend,$tstart)=split(/_/,$role);
3285: }
3286: my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
3287: $username);
3288: @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
3289: if (($tend!=0) && ($tend<$now)) { $trole=''; }
3290: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
3291: if (($area ne '') && ($trole ne '')) {
3292: my $spec=$trole.'.'.$area;
3293: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
3294: if ($trole =~ /^cr\//) {
3295: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
3296: } elsif ($trole eq 'gr') {
3297: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
3298: } else {
3299: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
3300: }
3301: }
3302: }
3303: }
3304: my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
3305: $userroles{'user.adv'} = $adv;
3306: $userroles{'user.author'} = $author;
3307: $env{'user.adv'}=$adv;
3308: }
3309: return \%userroles;
3310: }
3311:
3312: sub set_arearole {
3313: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
3314: # log the associated role with the area
3315: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
3316: return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
3317: }
3318:
3319: sub custom_roleprivs {
3320: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
3321: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
3322: my $homsvr=homeserver($rauthor,$rdomain);
3323: if (&hostname($homsvr) ne '') {
3324: my ($rdummy,$roledef)=
3325: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
3326: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
3327: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
3328: if (defined($syspriv)) {
3329: $$allroles{'cm./'}.=':'.$syspriv;
3330: $$allroles{$spec.'./'}.=':'.$syspriv;
3331: }
3332: if ($tdomain ne '') {
3333: if (defined($dompriv)) {
3334: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
3335: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
3336: }
3337: if (($trest ne '') && (defined($coursepriv))) {
3338: $$allroles{'cm.'.$area}.=':'.$coursepriv;
3339: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
3340: }
3341: }
3342: }
3343: }
3344: }
3345:
3346: sub group_roleprivs {
3347: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
3348: my $access = 1;
3349: my $now = time;
3350: if (($tend!=0) && ($tend<$now)) { $access = 0; }
3351: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
3352: if ($access) {
3353: my ($course,$group) = ($area =~ m|(/$match_domain/$match_courseid)/([^/]+)$|);
3354: $$allgroups{$course}{$group} .=':'.$group_privs;
3355: }
3356: }
3357:
3358: sub standard_roleprivs {
3359: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
3360: if (defined($pr{$trole.':s'})) {
3361: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
3362: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
3363: }
3364: if ($tdomain ne '') {
3365: if (defined($pr{$trole.':d'})) {
3366: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3367: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
3368: }
3369: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
3370: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
3371: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
3372: }
3373: }
3374: }
3375:
3376: sub set_userprivs {
3377: my ($userroles,$allroles,$allgroups) = @_;
3378: my $author=0;
3379: my $adv=0;
3380: my %grouproles = ();
3381: if (keys(%{$allgroups}) > 0) {
3382: foreach my $role (keys %{$allroles}) {
3383: my ($trole,$area,$sec,$extendedarea);
3384: if ($role =~ m-^(\w+|cr/$match_domain/$match_username/\w+)\.(/$match_domain/$match_courseid)(/?\w*)\.-) {
3385: $trole = $1;
3386: $area = $2;
3387: $sec = $3;
3388: $extendedarea = $area.$sec;
3389: if (exists($$allgroups{$area})) {
3390: foreach my $group (keys(%{$$allgroups{$area}})) {
3391: my $spec = $trole.'.'.$extendedarea;
3392: $grouproles{$spec.'.'.$area.'/'.$group} =
3393: $$allgroups{$area}{$group};
3394: }
3395: }
3396: }
3397: }
3398: }
3399: foreach my $group (keys(%grouproles)) {
3400: $$allroles{$group} = $grouproles{$group};
3401: }
3402: foreach my $role (keys(%{$allroles})) {
3403: my %thesepriv;
3404: if (($role=~/^au/) || ($role=~/^ca/)) { $author=1; }
3405: foreach my $item (split(/:/,$$allroles{$role})) {
3406: if ($item ne '') {
3407: my ($privilege,$restrictions)=split(/&/,$item);
3408: if ($restrictions eq '') {
3409: $thesepriv{$privilege}='F';
3410: } elsif ($thesepriv{$privilege} ne 'F') {
3411: $thesepriv{$privilege}.=$restrictions;
3412: }
3413: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
3414: }
3415: }
3416: my $thesestr='';
3417: foreach my $priv (keys(%thesepriv)) {
3418: $thesestr.=':'.$priv.'&'.$thesepriv{$priv};
3419: }
3420: $userroles->{'user.priv.'.$role} = $thesestr;
3421: }
3422: return ($author,$adv);
3423: }
3424:
3425: # --------------------------------------------------------------- get interface
3426:
3427: sub get {
3428: my ($namespace,$storearr,$udomain,$uname)=@_;
3429: my $items='';
3430: foreach my $item (@$storearr) {
3431: $items.=&escape($item).'&';
3432: }
3433: $items=~s/\&$//;
3434: if (!$udomain) { $udomain=$env{'user.domain'}; }
3435: if (!$uname) { $uname=$env{'user.name'}; }
3436: my $uhome=&homeserver($uname,$udomain);
3437:
3438: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
3439: my @pairs=split(/\&/,$rep);
3440: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
3441: return @pairs;
3442: }
3443: my %returnhash=();
3444: my $i=0;
3445: foreach my $item (@$storearr) {
3446: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3447: $i++;
3448: }
3449: return %returnhash;
3450: }
3451:
3452: # --------------------------------------------------------------- del interface
3453:
3454: sub del {
3455: my ($namespace,$storearr,$udomain,$uname)=@_;
3456: my $items='';
3457: foreach my $item (@$storearr) {
3458: $items.=&escape($item).'&';
3459: }
3460: $items=~s/\&$//;
3461: if (!$udomain) { $udomain=$env{'user.domain'}; }
3462: if (!$uname) { $uname=$env{'user.name'}; }
3463: my $uhome=&homeserver($uname,$udomain);
3464:
3465: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
3466: }
3467:
3468: # -------------------------------------------------------------- dump interface
3469:
3470: sub dump {
3471: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3472: if (!$udomain) { $udomain=$env{'user.domain'}; }
3473: if (!$uname) { $uname=$env{'user.name'}; }
3474: my $uhome=&homeserver($uname,$udomain);
3475: if ($regexp) {
3476: $regexp=&escape($regexp);
3477: } else {
3478: $regexp='.';
3479: }
3480: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3481: my @pairs=split(/\&/,$rep);
3482: my %returnhash=();
3483: foreach my $item (@pairs) {
3484: my ($key,$value)=split(/=/,$item,2);
3485: $key = &unescape($key);
3486: next if ($key =~ /^error: 2 /);
3487: $returnhash{$key}=&thaw_unescape($value);
3488: }
3489: return %returnhash;
3490: }
3491:
3492: # --------------------------------------------------------- dumpstore interface
3493:
3494: sub dumpstore {
3495: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
3496: if (!$udomain) { $udomain=$env{'user.domain'}; }
3497: if (!$uname) { $uname=$env{'user.name'}; }
3498: my $uhome=&homeserver($uname,$udomain);
3499: if ($regexp) {
3500: $regexp=&escape($regexp);
3501: } else {
3502: $regexp='.';
3503: }
3504: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
3505: my @pairs=split(/\&/,$rep);
3506: my %returnhash=();
3507: foreach my $item (@pairs) {
3508: my ($key,$value)=split(/=/,$item,2);
3509: next if ($key =~ /^error: 2 /);
3510: $returnhash{$key}=&thaw_unescape($value);
3511: }
3512: return %returnhash;
3513: }
3514:
3515: # -------------------------------------------------------------- keys interface
3516:
3517: sub getkeys {
3518: my ($namespace,$udomain,$uname)=@_;
3519: if (!$udomain) { $udomain=$env{'user.domain'}; }
3520: if (!$uname) { $uname=$env{'user.name'}; }
3521: my $uhome=&homeserver($uname,$udomain);
3522: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
3523: my @keyarray=();
3524: foreach my $key (split(/\&/,$rep)) {
3525: next if ($key =~ /^error: 2 /);
3526: push(@keyarray,&unescape($key));
3527: }
3528: return @keyarray;
3529: }
3530:
3531: # --------------------------------------------------------------- currentdump
3532: sub currentdump {
3533: my ($courseid,$sdom,$sname)=@_;
3534: $courseid = $env{'request.course.id'} if (! defined($courseid));
3535: $sdom = $env{'user.domain'} if (! defined($sdom));
3536: $sname = $env{'user.name'} if (! defined($sname));
3537: my $uhome = &homeserver($sname,$sdom);
3538: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
3539: return if ($rep =~ /^(error:|no_such_host)/);
3540: #
3541: my %returnhash=();
3542: #
3543: if ($rep eq "unknown_cmd") {
3544: # an old lond will not know currentdump
3545: # Do a dump and make it look like a currentdump
3546: my @tmp = &dumpstore($courseid,$sdom,$sname,'.');
3547: return if ($tmp[0] =~ /^(error:|no_such_host)/);
3548: my %hash = @tmp;
3549: @tmp=();
3550: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
3551: } else {
3552: my @pairs=split(/\&/,$rep);
3553: foreach my $pair (@pairs) {
3554: my ($key,$value)=split(/=/,$pair,2);
3555: my ($symb,$param) = split(/:/,$key);
3556: $returnhash{&unescape($symb)}->{&unescape($param)} =
3557: &thaw_unescape($value);
3558: }
3559: }
3560: return %returnhash;
3561: }
3562:
3563: sub convert_dump_to_currentdump{
3564: my %hash = %{shift()};
3565: my %returnhash;
3566: # Code ripped from lond, essentially. The only difference
3567: # here is the unescaping done by lonnet::dump(). Conceivably
3568: # we might run in to problems with parameter names =~ /^v\./
3569: while (my ($key,$value) = each(%hash)) {
3570: my ($v,$symb,$param) = split(/:/,$key);
3571: $symb = &unescape($symb);
3572: $param = &unescape($param);
3573: next if ($v eq 'version' || $symb eq 'keys');
3574: next if (exists($returnhash{$symb}) &&
3575: exists($returnhash{$symb}->{$param}) &&
3576: $returnhash{$symb}->{'v.'.$param} > $v);
3577: $returnhash{$symb}->{$param}=$value;
3578: $returnhash{$symb}->{'v.'.$param}=$v;
3579: }
3580: #
3581: # Remove all of the keys in the hashes which keep track of
3582: # the version of the parameter.
3583: while (my ($symb,$param_hash) = each(%returnhash)) {
3584: # use a foreach because we are going to delete from the hash.
3585: foreach my $key (keys(%$param_hash)) {
3586: delete($param_hash->{$key}) if ($key =~ /^v\./);
3587: }
3588: }
3589: return \%returnhash;
3590: }
3591:
3592: # ------------------------------------------------------ critical inc interface
3593:
3594: sub cinc {
3595: return &inc(@_,'critical');
3596: }
3597:
3598: # --------------------------------------------------------------- inc interface
3599:
3600: sub inc {
3601: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3602: if (!$udomain) { $udomain=$env{'user.domain'}; }
3603: if (!$uname) { $uname=$env{'user.name'}; }
3604: my $uhome=&homeserver($uname,$udomain);
3605: my $items='';
3606: if (! ref($store)) {
3607: # got a single value, so use that instead
3608: $items = &escape($store).'=&';
3609: } elsif (ref($store) eq 'SCALAR') {
3610: $items = &escape($$store).'=&';
3611: } elsif (ref($store) eq 'ARRAY') {
3612: $items = join('=&',map {&escape($_);} @{$store});
3613: } elsif (ref($store) eq 'HASH') {
3614: while (my($key,$value) = each(%{$store})) {
3615: $items.= &escape($key).'='.&escape($value).'&';
3616: }
3617: }
3618: $items=~s/\&$//;
3619: if ($critical) {
3620: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3621: } else {
3622: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3623: }
3624: }
3625:
3626: # --------------------------------------------------------------- put interface
3627:
3628: sub put {
3629: my ($namespace,$storehash,$udomain,$uname)=@_;
3630: if (!$udomain) { $udomain=$env{'user.domain'}; }
3631: if (!$uname) { $uname=$env{'user.name'}; }
3632: my $uhome=&homeserver($uname,$udomain);
3633: my $items='';
3634: foreach my $item (keys(%$storehash)) {
3635: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3636: }
3637: $items=~s/\&$//;
3638: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3639: }
3640:
3641: # ------------------------------------------------------------ newput interface
3642:
3643: sub newput {
3644: my ($namespace,$storehash,$udomain,$uname)=@_;
3645: if (!$udomain) { $udomain=$env{'user.domain'}; }
3646: if (!$uname) { $uname=$env{'user.name'}; }
3647: my $uhome=&homeserver($uname,$udomain);
3648: my $items='';
3649: foreach my $key (keys(%$storehash)) {
3650: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3651: }
3652: $items=~s/\&$//;
3653: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3654: }
3655:
3656: # --------------------------------------------------------- putstore interface
3657:
3658: sub putstore {
3659: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3660: if (!$udomain) { $udomain=$env{'user.domain'}; }
3661: if (!$uname) { $uname=$env{'user.name'}; }
3662: my $uhome=&homeserver($uname,$udomain);
3663: my $items='';
3664: foreach my $key (keys(%$storehash)) {
3665: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3666: }
3667: $items=~s/\&$//;
3668: my $esc_symb=&escape($symb);
3669: my $esc_v=&escape($version);
3670: my $reply =
3671: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3672: $uhome);
3673: if ($reply eq 'unknown_cmd') {
3674: # gfall back to way things use to be done
3675: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3676: $uname);
3677: }
3678: return $reply;
3679: }
3680:
3681: sub old_putstore {
3682: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3683: if (!$udomain) { $udomain=$env{'user.domain'}; }
3684: if (!$uname) { $uname=$env{'user.name'}; }
3685: my $uhome=&homeserver($uname,$udomain);
3686: my %newstorehash;
3687: foreach my $item (keys(%$storehash)) {
3688: my $key = $version.':'.&escape($symb).':'.$item;
3689: $newstorehash{$key} = $storehash->{$item};
3690: }
3691: my $items='';
3692: my %allitems = ();
3693: foreach my $item (keys(%newstorehash)) {
3694: if ($item =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3695: my $key = $1.':keys:'.$2;
3696: $allitems{$key} .= $3.':';
3697: }
3698: $items.=$item.'='.&freeze_escape($newstorehash{$item}).'&';
3699: }
3700: foreach my $item (keys(%allitems)) {
3701: $allitems{$item} =~ s/\:$//;
3702: $items.= $item.'='.$allitems{$item}.'&';
3703: }
3704: $items=~s/\&$//;
3705: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3706: }
3707:
3708: # ------------------------------------------------------ critical put interface
3709:
3710: sub cput {
3711: my ($namespace,$storehash,$udomain,$uname)=@_;
3712: if (!$udomain) { $udomain=$env{'user.domain'}; }
3713: if (!$uname) { $uname=$env{'user.name'}; }
3714: my $uhome=&homeserver($uname,$udomain);
3715: my $items='';
3716: foreach my $item (keys(%$storehash)) {
3717: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3718: }
3719: $items=~s/\&$//;
3720: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3721: }
3722:
3723: # -------------------------------------------------------------- eget interface
3724:
3725: sub eget {
3726: my ($namespace,$storearr,$udomain,$uname)=@_;
3727: my $items='';
3728: foreach my $item (@$storearr) {
3729: $items.=&escape($item).'&';
3730: }
3731: $items=~s/\&$//;
3732: if (!$udomain) { $udomain=$env{'user.domain'}; }
3733: if (!$uname) { $uname=$env{'user.name'}; }
3734: my $uhome=&homeserver($uname,$udomain);
3735: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3736: my @pairs=split(/\&/,$rep);
3737: my %returnhash=();
3738: my $i=0;
3739: foreach my $item (@$storearr) {
3740: $returnhash{$item}=&thaw_unescape($pairs[$i]);
3741: $i++;
3742: }
3743: return %returnhash;
3744: }
3745:
3746: # ------------------------------------------------------------ tmpput interface
3747: sub tmpput {
3748: my ($storehash,$server,$context)=@_;
3749: my $items='';
3750: foreach my $item (keys(%$storehash)) {
3751: $items.=&escape($item).'='.&freeze_escape($$storehash{$item}).'&';
3752: }
3753: $items=~s/\&$//;
3754: if (defined($context)) {
3755: $items .= ':'.&escape($context);
3756: }
3757: return &reply("tmpput:$items",$server);
3758: }
3759:
3760: # ------------------------------------------------------------ tmpget interface
3761: sub tmpget {
3762: my ($token,$server)=@_;
3763: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3764: my $rep=&reply("tmpget:$token",$server);
3765: my %returnhash;
3766: foreach my $item (split(/\&/,$rep)) {
3767: my ($key,$value)=split(/=/,$item);
3768: $returnhash{&unescape($key)}=&thaw_unescape($value);
3769: }
3770: return %returnhash;
3771: }
3772:
3773: # ------------------------------------------------------------ tmpget interface
3774: sub tmpdel {
3775: my ($token,$server)=@_;
3776: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3777: return &reply("tmpdel:$token",$server);
3778: }
3779:
3780: # -------------------------------------------------- portfolio access checking
3781:
3782: sub portfolio_access {
3783: my ($requrl) = @_;
3784: my (undef,$udom,$unum,$file_name,$group) = &parse_portfolio_url($requrl);
3785: my $result = &get_portfolio_access($udom,$unum,$file_name,$group);
3786: if ($result) {
3787: my %setters;
3788: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3789: my ($startblock,$endblock) =
3790: &Apache::loncommon::blockcheck(\%setters,'port',$unum,$udom);
3791: if ($startblock && $endblock) {
3792: return 'B';
3793: }
3794: } else {
3795: my ($startblock,$endblock) =
3796: &Apache::loncommon::blockcheck(\%setters,'port');
3797: if ($startblock && $endblock) {
3798: return 'B';
3799: }
3800: }
3801: }
3802: if ($result eq 'ok') {
3803: return 'F';
3804: } elsif ($result =~ /^[^:]+:guest_/) {
3805: return 'A';
3806: }
3807: return '';
3808: }
3809:
3810: sub get_portfolio_access {
3811: my ($udom,$unum,$file_name,$group,$access_hash) = @_;
3812:
3813: if (!ref($access_hash)) {
3814: my $current_perms = &get_portfile_permissions($udom,$unum);
3815: my %access_controls = &get_access_controls($current_perms,$group,
3816: $file_name);
3817: $access_hash = $access_controls{$file_name};
3818: }
3819:
3820: my ($public,$guest,@domains,@users,@courses,@groups);
3821: my $now = time;
3822: if (ref($access_hash) eq 'HASH') {
3823: foreach my $key (keys(%{$access_hash})) {
3824: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
3825: if ($start > $now) {
3826: next;
3827: }
3828: if ($end && $end<$now) {
3829: next;
3830: }
3831: if ($scope eq 'public') {
3832: $public = $key;
3833: last;
3834: } elsif ($scope eq 'guest') {
3835: $guest = $key;
3836: } elsif ($scope eq 'domains') {
3837: push(@domains,$key);
3838: } elsif ($scope eq 'users') {
3839: push(@users,$key);
3840: } elsif ($scope eq 'course') {
3841: push(@courses,$key);
3842: } elsif ($scope eq 'group') {
3843: push(@groups,$key);
3844: }
3845: }
3846: if ($public) {
3847: return 'ok';
3848: }
3849: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3850: if ($guest) {
3851: return $guest;
3852: }
3853: } else {
3854: if (@domains > 0) {
3855: foreach my $domkey (@domains) {
3856: if (ref($access_hash->{$domkey}{'dom'}) eq 'ARRAY') {
3857: if (grep(/^\Q$env{'user.domain'}\E$/,@{$access_hash->{$domkey}{'dom'}})) {
3858: return 'ok';
3859: }
3860: }
3861: }
3862: }
3863: if (@users > 0) {
3864: foreach my $userkey (@users) {
3865: if (ref($access_hash->{$userkey}{'users'}) eq 'ARRAY') {
3866: foreach my $item (@{$access_hash->{$userkey}{'users'}}) {
3867: if (ref($item) eq 'HASH') {
3868: if (($item->{'uname'} eq $env{'user.name'}) &&
3869: ($item->{'udom'} eq $env{'user.domain'})) {
3870: return 'ok';
3871: }
3872: }
3873: }
3874: }
3875: }
3876: }
3877: my %roleshash;
3878: my @courses_and_groups = @courses;
3879: push(@courses_and_groups,@groups);
3880: if (@courses_and_groups > 0) {
3881: my (%allgroups,%allroles);
3882: my ($start,$end,$role,$sec,$group);
3883: foreach my $envkey (%env) {
3884: if ($envkey =~ m-^user\.role\.(gr|cc|in|ta|ep|st)\./($match_domain)/($match_courseid)/?([^/]*)$-) {
3885: my $cid = $2.'_'.$3;
3886: if ($1 eq 'gr') {
3887: $group = $4;
3888: $allgroups{$cid}{$group} = $env{$envkey};
3889: } else {
3890: if ($4 eq '') {
3891: $sec = 'none';
3892: } else {
3893: $sec = $4;
3894: }
3895: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3896: }
3897: } elsif ($envkey =~ m-^user\.role\./cr/($match_domain/$match_username/\w*)./($match_domain)/($match_courseid)/?([^/]*)$-) {
3898: my $cid = $2.'_'.$3;
3899: if ($4 eq '') {
3900: $sec = 'none';
3901: } else {
3902: $sec = $4;
3903: }
3904: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3905: }
3906: }
3907: if (keys(%allroles) == 0) {
3908: return;
3909: }
3910: foreach my $key (@courses_and_groups) {
3911: my %content = %{$$access_hash{$key}};
3912: my $cnum = $content{'number'};
3913: my $cdom = $content{'domain'};
3914: my $cid = $cdom.'_'.$cnum;
3915: if (!exists($allroles{$cid})) {
3916: next;
3917: }
3918: foreach my $role_id (keys(%{$content{'roles'}})) {
3919: my @sections = @{$content{'roles'}{$role_id}{'section'}};
3920: my @groups = @{$content{'roles'}{$role_id}{'group'}};
3921: my @status = @{$content{'roles'}{$role_id}{'access'}};
3922: my @roles = @{$content{'roles'}{$role_id}{'role'}};
3923: foreach my $role (keys(%{$allroles{$cid}})) {
3924: if ((grep/^all$/,@roles) || (grep/^\Q$role\E$/,@roles)) {
3925: foreach my $sec (keys(%{$allroles{$cid}{$role}})) {
3926: if (&course_group_datechecker($allroles{$cid}{$role}{$sec},$now,\@status) eq 'ok') {
3927: if (grep/^all$/,@sections) {
3928: return 'ok';
3929: } else {
3930: if (grep/^$sec$/,@sections) {
3931: return 'ok';
3932: }
3933: }
3934: }
3935: }
3936: if (keys(%{$allgroups{$cid}}) == 0) {
3937: if (grep/^none$/,@groups) {
3938: return 'ok';
3939: }
3940: } else {
3941: if (grep/^all$/,@groups) {
3942: return 'ok';
3943: }
3944: foreach my $group (keys(%{$allgroups{$cid}})) {
3945: if (grep/^$group$/,@groups) {
3946: return 'ok';
3947: }
3948: }
3949: }
3950: }
3951: }
3952: }
3953: }
3954: }
3955: if ($guest) {
3956: return $guest;
3957: }
3958: }
3959: }
3960: return;
3961: }
3962:
3963: sub course_group_datechecker {
3964: my ($dates,$now,$status) = @_;
3965: my ($start,$end) = split(/\./,$dates);
3966: if (!$start && !$end) {
3967: return 'ok';
3968: }
3969: if (grep/^active$/,@{$status}) {
3970: if (((!$start) || ($start && $start <= $now)) && ((!$end) || ($end && $end >= $now))) {
3971: return 'ok';
3972: }
3973: }
3974: if (grep/^previous$/,@{$status}) {
3975: if ($end > $now ) {
3976: return 'ok';
3977: }
3978: }
3979: if (grep/^future$/,@{$status}) {
3980: if ($start > $now) {
3981: return 'ok';
3982: }
3983: }
3984: return;
3985: }
3986:
3987: sub parse_portfolio_url {
3988: my ($url) = @_;
3989:
3990: my ($type,$udom,$unum,$group,$file_name);
3991:
3992: if ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_username)/portfolio(/.+)$-) {
3993: $type = 1;
3994: $udom = $1;
3995: $unum = $2;
3996: $file_name = $3;
3997: } elsif ($url =~ m-^/*(?:uploaded|editupload)/($match_domain)/($match_courseid)/groups/([^/]+)/portfolio/(.+)$-) {
3998: $type = 2;
3999: $udom = $1;
4000: $unum = $2;
4001: $group = $3;
4002: $file_name = $3.'/'.$4;
4003: }
4004: if (wantarray) {
4005: return ($type,$udom,$unum,$file_name,$group);
4006: }
4007: return $type;
4008: }
4009:
4010: sub is_portfolio_url {
4011: my ($url) = @_;
4012: return scalar(&parse_portfolio_url($url));
4013: }
4014:
4015: sub is_portfolio_file {
4016: my ($file) = @_;
4017: if (($file =~ /^portfolio/) || ($file =~ /^groups\/\w+\/portfolio/)) {
4018: return 1;
4019: }
4020: return;
4021: }
4022:
4023:
4024: # ---------------------------------------------- Custom access rule evaluation
4025:
4026: sub customaccess {
4027: my ($priv,$uri)=@_;
4028: my ($urole,$urealm)=split(/\./,$env{'request.role'},2);
4029: my (undef,$udom,$ucrs,$usec)=split(/\//,$urealm);
4030: $udom = &LONCAPA::clean_domain($udom);
4031: $ucrs = &LONCAPA::clean_username($ucrs);
4032: my $access=0;
4033: foreach my $right (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
4034: my ($effect,$realm,$role,$type)=split(/\:/,$right);
4035: if ($type eq 'user') {
4036: foreach my $scope (split(/\s*\,\s*/,$realm)) {
4037: my ($tdom,$tuname)=split(m{/},$scope);
4038: if ($tdom) {
4039: if ($tdom ne $env{'user.domain'}) { next; }
4040: }
4041: if ($tuname) {
4042: if ($tuname ne $env{'user.name'}) { next; }
4043: }
4044: $access=($effect eq 'allow');
4045: last;
4046: }
4047: } else {
4048: if ($role) {
4049: if ($role ne $urole) { next; }
4050: }
4051: foreach my $scope (split(/\s*\,\s*/,$realm)) {
4052: my ($tdom,$tcrs,$tsec)=split(/\_/,$scope);
4053: if ($tdom) {
4054: if ($tdom ne $udom) { next; }
4055: }
4056: if ($tcrs) {
4057: if ($tcrs ne $ucrs) { next; }
4058: }
4059: if ($tsec) {
4060: if ($tsec ne $usec) { next; }
4061: }
4062: $access=($effect eq 'allow');
4063: last;
4064: }
4065: if ($realm eq '' && $role eq '') {
4066: $access=($effect eq 'allow');
4067: }
4068: }
4069: }
4070: return $access;
4071: }
4072:
4073: # ------------------------------------------------- Check for a user privilege
4074:
4075: sub allowed {
4076: my ($priv,$uri,$symb,$role)=@_;
4077: my $ver_orguri=$uri;
4078: $uri=&deversion($uri);
4079: my $orguri=$uri;
4080: $uri=&declutter($uri);
4081:
4082: if ($priv eq 'evb') {
4083: # Evade communication block restrictions for specified role in a course
4084: if ($env{'user.priv.'.$role} =~/evb\&([^\:]*)/) {
4085: return $1;
4086: } else {
4087: return;
4088: }
4089: }
4090:
4091: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
4092: # Free bre access to adm and meta resources
4093: if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard)$}))
4094: || (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) ))
4095: && ($priv eq 'bre')) {
4096: return 'F';
4097: }
4098:
4099: # Free bre access to user's own portfolio contents
4100: my ($space,$domain,$name,@dir)=split('/',$uri);
4101: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
4102: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
4103: my %setters;
4104: my ($startblock,$endblock) =
4105: &Apache::loncommon::blockcheck(\%setters,'port');
4106: if ($startblock && $endblock) {
4107: return 'B';
4108: } else {
4109: return 'F';
4110: }
4111: }
4112:
4113: # bre access to group portfolio for rgf priv in group, or mdg or vcg in course.
4114: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
4115: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
4116: if (exists($env{'request.course.id'})) {
4117: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
4118: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
4119: if (($domain eq $cdom) && ($name eq $cnum)) {
4120: my $courseprivid=$env{'request.course.id'};
4121: $courseprivid=~s/\_/\//;
4122: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
4123: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
4124: return $1;
4125: } else {
4126: if ($env{'request.course.sec'}) {
4127: $courseprivid.='/'.$env{'request.course.sec'};
4128: }
4129: if ($env{'user.priv.'.$env{'request.role'}.'./'.
4130: $courseprivid} =~/(mdg|vcg)\&([^\:]*)/) {
4131: return $2;
4132: }
4133: }
4134: }
4135: }
4136: }
4137:
4138: # Free bre to public access
4139:
4140: if ($priv eq 'bre') {
4141: my $copyright=&metadata($uri,'copyright');
4142: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
4143: return 'F';
4144: }
4145: if ($copyright eq 'priv') {
4146: $uri=~/([^\/]+)\/([^\/]+)\//;
4147: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
4148: return '';
4149: }
4150: }
4151: if ($copyright eq 'domain') {
4152: $uri=~/([^\/]+)\/([^\/]+)\//;
4153: unless (($env{'user.domain'} eq $1) ||
4154: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
4155: return '';
4156: }
4157: }
4158: if ($env{'request.role'}=~ /li\.\//) {
4159: # Library role, so allow browsing of resources in this domain.
4160: return 'F';
4161: }
4162: if ($copyright eq 'custom') {
4163: unless (&customaccess($priv,$uri)) { return ''; }
4164: }
4165: }
4166: # Domain coordinator is trying to create a course
4167: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
4168: # uri is the requested domain in this case.
4169: # comparison to 'request.role.domain' shows if the user has selected
4170: # a role of dc for the domain in question.
4171: return 'F' if ($uri eq $env{'request.role.domain'});
4172: }
4173:
4174: my $thisallowed='';
4175: my $statecond=0;
4176: my $courseprivid='';
4177:
4178: # Course
4179:
4180: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
4181: $thisallowed.=$1;
4182: }
4183:
4184: # Domain
4185:
4186: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
4187: =~/\Q$priv\E\&([^\:]*)/) {
4188: $thisallowed.=$1;
4189: }
4190:
4191: # Course: uri itself is a course
4192: my $courseuri=$uri;
4193: $courseuri=~s/\_(\d)/\/$1/;
4194: $courseuri=~s/^([^\/])/\/$1/;
4195:
4196: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
4197: =~/\Q$priv\E\&([^\:]*)/) {
4198: $thisallowed.=$1;
4199: }
4200:
4201: # URI is an uploaded document for this course, default permissions don't matter
4202: # not allowing 'edit' access (editupload) to uploaded course docs
4203: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
4204: $thisallowed='';
4205: my ($match)=&is_on_map($uri);
4206: if ($match) {
4207: if ($env{'user.priv.'.$env{'request.role'}.'./'}
4208: =~/\Q$priv\E\&([^\:]*)/) {
4209: $thisallowed.=$1;
4210: }
4211: } else {
4212: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
4213: if ($refuri) {
4214: if ($refuri =~ m|^/adm/|) {
4215: $thisallowed='F';
4216: } else {
4217: $refuri=&declutter($refuri);
4218: my ($match) = &is_on_map($refuri);
4219: if ($match) {
4220: $thisallowed='F';
4221: }
4222: }
4223: }
4224: }
4225: }
4226:
4227: if ($priv eq 'bre'
4228: && $thisallowed ne 'F'
4229: && $thisallowed ne '2'
4230: && &is_portfolio_url($uri)) {
4231: $thisallowed = &portfolio_access($uri);
4232: }
4233:
4234: # Full access at system, domain or course-wide level? Exit.
4235:
4236: if ($thisallowed=~/F/) {
4237: return 'F';
4238: }
4239:
4240: # If this is generating or modifying users, exit with special codes
4241:
4242: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
4243: if (($priv eq 'cca') || ($priv eq 'caa')) {
4244: my ($audom,$auname)=split('/',$uri);
4245: # no author name given, so this just checks on the general right to make a co-author in this domain
4246: unless ($auname) { return $thisallowed; }
4247: # an author name is given, so we are about to actually make a co-author for a certain account
4248: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
4249: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
4250: ($audom ne $env{'request.role.domain'}))) { return ''; }
4251: }
4252: return $thisallowed;
4253: }
4254: #
4255: # Gathered so far: system, domain and course wide privileges
4256: #
4257: # Course: See if uri or referer is an individual resource that is part of
4258: # the course
4259:
4260: if ($env{'request.course.id'}) {
4261:
4262: $courseprivid=$env{'request.course.id'};
4263: if ($env{'request.course.sec'}) {
4264: $courseprivid.='/'.$env{'request.course.sec'};
4265: }
4266: $courseprivid=~s/\_/\//;
4267: my $checkreferer=1;
4268: my ($match,$cond)=&is_on_map($uri);
4269: if ($match) {
4270: $statecond=$cond;
4271: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
4272: =~/\Q$priv\E\&([^\:]*)/) {
4273: $thisallowed.=$1;
4274: $checkreferer=0;
4275: }
4276: }
4277:
4278: if ($checkreferer) {
4279: my $refuri=$env{'httpref.'.$orguri};
4280: unless ($refuri) {
4281: foreach my $key (keys(%env)) {
4282: if ($key=~/^httpref\..*\*/) {
4283: my $pattern=$key;
4284: $pattern=~s/^httpref\.\/res\///;
4285: $pattern=~s/\*/\[\^\/\]\+/g;
4286: $pattern=~s/\//\\\//g;
4287: if ($orguri=~/$pattern/) {
4288: $refuri=$env{$key};
4289: }
4290: }
4291: }
4292: }
4293:
4294: if ($refuri) {
4295: $refuri=&declutter($refuri);
4296: my ($match,$cond)=&is_on_map($refuri);
4297: if ($match) {
4298: my $refstatecond=$cond;
4299: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
4300: =~/\Q$priv\E\&([^\:]*)/) {
4301: $thisallowed.=$1;
4302: $uri=$refuri;
4303: $statecond=$refstatecond;
4304: }
4305: }
4306: }
4307: }
4308: }
4309:
4310: #
4311: # Gathered now: all privileges that could apply, and condition number
4312: #
4313: #
4314: # Full or no access?
4315: #
4316:
4317: if ($thisallowed=~/F/) {
4318: return 'F';
4319: }
4320:
4321: unless ($thisallowed) {
4322: return '';
4323: }
4324:
4325: # Restrictions exist, deal with them
4326: #
4327: # C:according to course preferences
4328: # R:according to resource settings
4329: # L:unless locked
4330: # X:according to user session state
4331: #
4332:
4333: # Possibly locked functionality, check all courses
4334: # Locks might take effect only after 10 minutes cache expiration for other
4335: # courses, and 2 minutes for current course
4336:
4337: my $envkey;
4338: if ($thisallowed=~/L/) {
4339: foreach $envkey (keys %env) {
4340: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
4341: my $courseid=$2;
4342: my $roleid=$1.'.'.$2;
4343: $courseid=~s/^\///;
4344: my $expiretime=600;
4345: if ($env{'request.role'} eq $roleid) {
4346: $expiretime=120;
4347: }
4348: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
4349: my $prefix='course.'.$cdom.'_'.$cnum.'.';
4350: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
4351: &coursedescription($courseid,{'freshen_cache' => 1});
4352: }
4353: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
4354: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
4355: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
4356: &log($env{'user.domain'},$env{'user.name'},
4357: $env{'user.home'},
4358: 'Locked by res: '.$priv.' for '.$uri.' due to '.
4359: $cdom.'/'.$cnum.'/'.$csec.' expire '.
4360: $env{$prefix.'priv.'.$priv.'.lock.expire'});
4361: return '';
4362: }
4363: }
4364: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
4365: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
4366: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
4367: &log($env{'user.domain'},$env{'user.name'},
4368: $env{'user.home'},
4369: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
4370: $cdom.'/'.$cnum.'/'.$csec.' expire '.
4371: $env{$prefix.'priv.'.$priv.'.lock.expire'});
4372: return '';
4373: }
4374: }
4375: }
4376: }
4377: }
4378:
4379: #
4380: # Rest of the restrictions depend on selected course
4381: #
4382:
4383: unless ($env{'request.course.id'}) {
4384: if ($thisallowed eq 'A') {
4385: return 'A';
4386: } elsif ($thisallowed eq 'B') {
4387: return 'B';
4388: } else {
4389: return '1';
4390: }
4391: }
4392:
4393: #
4394: # Now user is definitely in a course
4395: #
4396:
4397:
4398: # Course preferences
4399:
4400: if ($thisallowed=~/C/) {
4401: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4402: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
4403: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
4404: =~/\Q$rolecode\E/) {
4405: if ($priv ne 'pch') {
4406: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4407: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
4408: $env{'request.course.id'});
4409: }
4410: return '';
4411: }
4412:
4413: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
4414: =~/\Q$unamedom\E/) {
4415: if ($priv ne 'pch') {
4416: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
4417: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
4418: $env{'request.course.id'});
4419: }
4420: return '';
4421: }
4422: }
4423:
4424: # Resource preferences
4425:
4426: if ($thisallowed=~/R/) {
4427: my $rolecode=(split(/\./,$env{'request.role'}))[0];
4428: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
4429: if ($priv ne 'pch') {
4430: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
4431: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
4432: }
4433: return '';
4434: }
4435: }
4436:
4437: # Restricted by state or randomout?
4438:
4439: if ($thisallowed=~/X/) {
4440: if ($env{'acc.randomout'}) {
4441: if (!$symb) { $symb=&symbread($uri,1); }
4442: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
4443: return '';
4444: }
4445: }
4446: if (&condval($statecond)) {
4447: return '2';
4448: } else {
4449: return '';
4450: }
4451: }
4452:
4453: if ($thisallowed eq 'A') {
4454: return 'A';
4455: } elsif ($thisallowed eq 'B') {
4456: return 'B';
4457: }
4458: return 'F';
4459: }
4460:
4461: sub split_uri_for_cond {
4462: my $uri=&deversion(&declutter(shift));
4463: my @uriparts=split(/\//,$uri);
4464: my $filename=pop(@uriparts);
4465: my $pathname=join('/',@uriparts);
4466: return ($pathname,$filename);
4467: }
4468: # --------------------------------------------------- Is a resource on the map?
4469:
4470: sub is_on_map {
4471: my ($pathname,$filename) = &split_uri_for_cond(shift);
4472: #Trying to find the conditional for the file
4473: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
4474: /\&\Q$filename\E\:([\d\|]+)\&/);
4475: if ($match) {
4476: return (1,$1);
4477: } else {
4478: return (0,0);
4479: }
4480: }
4481:
4482: # --------------------------------------------------------- Get symb from alias
4483:
4484: sub get_symb_from_alias {
4485: my $symb=shift;
4486: my ($map,$resid,$url)=&decode_symb($symb);
4487: # Already is a symb
4488: if ($url) { return $symb; }
4489: # Must be an alias
4490: my $aliassymb='';
4491: my %bighash;
4492: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4493: &GDBM_READER(),0640)) {
4494: my $rid=$bighash{'mapalias_'.$symb};
4495: if ($rid) {
4496: my ($mapid,$resid)=split(/\./,$rid);
4497: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
4498: $resid,$bighash{'src_'.$rid});
4499: }
4500: untie %bighash;
4501: }
4502: return $aliassymb;
4503: }
4504:
4505: # ----------------------------------------------------------------- Define Role
4506:
4507: sub definerole {
4508: if (allowed('mcr','/')) {
4509: my ($rolename,$sysrole,$domrole,$courole)=@_;
4510: foreach my $role (split(':',$sysrole)) {
4511: my ($crole,$cqual)=split(/\&/,$role);
4512: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
4513: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
4514: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4515: return "refused:s:$crole&$cqual";
4516: }
4517: }
4518: }
4519: foreach my $role (split(':',$domrole)) {
4520: my ($crole,$cqual)=split(/\&/,$role);
4521: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
4522: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
4523: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
4524: return "refused:d:$crole&$cqual";
4525: }
4526: }
4527: }
4528: foreach my $role (split(':',$courole)) {
4529: my ($crole,$cqual)=split(/\&/,$role);
4530: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
4531: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
4532: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
4533: return "refused:c:$crole&$cqual";
4534: }
4535: }
4536: }
4537: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4538: "$env{'user.domain'}:$env{'user.name'}:".
4539: "rolesdef_$rolename=".
4540: escape($sysrole.'_'.$domrole.'_'.$courole);
4541: return reply($command,$env{'user.home'});
4542: } else {
4543: return 'refused';
4544: }
4545: }
4546:
4547: # ---------------- Make a metadata query against the network of library servers
4548:
4549: sub metadata_query {
4550: my ($query,$custom,$customshow,$server_array)=@_;
4551: my %rhash;
4552: my %libserv = &all_library();
4553: my @server_list = (defined($server_array) ? @$server_array
4554: : keys(%libserv) );
4555: for my $server (@server_list) {
4556: unless ($custom or $customshow) {
4557: my $reply=&reply("querysend:".&escape($query),$server);
4558: $rhash{$server}=$reply;
4559: }
4560: else {
4561: my $reply=&reply("querysend:".&escape($query).':'.
4562: &escape($custom).':'.&escape($customshow),
4563: $server);
4564: $rhash{$server}=$reply;
4565: }
4566: }
4567: return \%rhash;
4568: }
4569:
4570: # ----------------------------------------- Send log queries and wait for reply
4571:
4572: sub log_query {
4573: my ($uname,$udom,$query,%filters)=@_;
4574: my $uhome=&homeserver($uname,$udom);
4575: if ($uhome eq 'no_host') { return 'error: no_host'; }
4576: my $uhost=&hostname($uhome);
4577: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys(%filters)));
4578: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
4579: $uhome);
4580: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
4581: return get_query_reply($queryid);
4582: }
4583:
4584: # -------------------------- Update MySQL table for portfolio file
4585:
4586: sub update_portfolio_table {
4587: my ($uname,$udom,$file_name,$query,$group,$action) = @_;
4588: my $homeserver = &homeserver($uname,$udom);
4589: my $queryid=
4590: &reply("querysend:".$query.':'.&escape($uname.':'.$udom.':'.$group).
4591: ':'.&escape($file_name).':'.$action,$homeserver);
4592: my $reply = &get_query_reply($queryid);
4593: return $reply;
4594: }
4595:
4596: # -------------------------- Update MySQL allusers table
4597:
4598: sub update_allusers_table {
4599: my ($uname,$udom,$names) = @_;
4600: my $homeserver = &homeserver($uname,$udom);
4601: my $queryid=
4602: &reply('querysend:allusers:'.&escape($uname).':'.&escape($udom).':'.
4603: 'lastname='.&escape($names->{'lastname'}).'%%'.
4604: 'firstname='.&escape($names->{'firstname'}).'%%'.
4605: 'middlename='.&escape($names->{'middlename'}).'%%'.
4606: 'generation='.&escape($names->{'generation'}).'%%'.
4607: 'permanentemail='.&escape($names->{'permanentemail'}).'%%'.
4608: 'id='.&escape($names->{'id'}),$homeserver);
4609: my $reply = &get_query_reply($queryid);
4610: return $reply;
4611: }
4612:
4613: # ------- Request retrieval of institutional classlists for course(s)
4614:
4615: sub fetch_enrollment_query {
4616: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
4617: my $homeserver;
4618: my $maxtries = 1;
4619: if ($context eq 'automated') {
4620: $homeserver = $perlvar{'lonHostID'};
4621: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
4622: } else {
4623: $homeserver = &homeserver($cnum,$dom);
4624: }
4625: my $host=&hostname($homeserver);
4626: my $cmd = '';
4627: foreach my $affiliate (keys %{$affiliatesref}) {
4628: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4629: }
4630: $cmd =~ s/%%$//;
4631: $cmd = &escape($cmd);
4632: my $query = 'fetchenrollment';
4633: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
4634: unless ($queryid=~/^\Q$host\E\_/) {
4635: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
4636: return 'error: '.$queryid;
4637: }
4638: my $reply = &get_query_reply($queryid);
4639: my $tries = 1;
4640: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4641: $reply = &get_query_reply($queryid);
4642: $tries ++;
4643: }
4644: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4645: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4646: } else {
4647: my @responses = split(/:/,$reply);
4648: if ($homeserver eq $perlvar{'lonHostID'}) {
4649: foreach my $line (@responses) {
4650: my ($key,$value) = split(/=/,$line,2);
4651: $$replyref{$key} = $value;
4652: }
4653: } else {
4654: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
4655: foreach my $line (@responses) {
4656: my ($key,$value) = split(/=/,$line);
4657: $$replyref{$key} = $value;
4658: if ($value > 0) {
4659: foreach my $item (@{$$affiliatesref{$key}}) {
4660: my $filename = $dom.'_'.$key.'_'.$item.'_classlist.xml';
4661: my $destname = $pathname.'/'.$filename;
4662: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
4663: if ($xml_classlist =~ /^error/) {
4664: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
4665: } else {
4666: if ( open(FILE,">$destname") ) {
4667: print FILE &unescape($xml_classlist);
4668: close(FILE);
4669: } else {
4670: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
4671: }
4672: }
4673: }
4674: }
4675: }
4676: }
4677: return 'ok';
4678: }
4679: return 'error';
4680: }
4681:
4682: sub get_query_reply {
4683: my $queryid=shift;
4684: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
4685: my $reply='';
4686: for (1..100) {
4687: sleep 2;
4688: if (-e $replyfile.'.end') {
4689: if (open(my $fh,$replyfile)) {
4690: $reply = join('',<$fh>);
4691: close($fh);
4692: } else { return 'error: reply_file_error'; }
4693: return &unescape($reply);
4694: }
4695: }
4696: return 'timeout:'.$queryid;
4697: }
4698:
4699: sub courselog_query {
4700: #
4701: # possible filters:
4702: # url: url or symb
4703: # username
4704: # domain
4705: # action: view, submit, grade
4706: # start: timestamp
4707: # end: timestamp
4708: #
4709: my (%filters)=@_;
4710: unless ($env{'request.course.id'}) { return 'no_course'; }
4711: if ($filters{'url'}) {
4712: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
4713: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
4714: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
4715: }
4716: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
4717: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
4718: return &log_query($cname,$cdom,'courselog',%filters);
4719: }
4720:
4721: sub userlog_query {
4722: #
4723: # possible filters:
4724: # action: log check role
4725: # start: timestamp
4726: # end: timestamp
4727: #
4728: my ($uname,$udom,%filters)=@_;
4729: return &log_query($uname,$udom,'userlog',%filters);
4730: }
4731:
4732: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
4733:
4734: sub auto_run {
4735: my ($cnum,$cdom) = @_;
4736: my $response = 0;
4737: my $settings;
4738: my %domconfig = &get_dom('configuration',['autoenroll'],$cdom);
4739: if (ref($domconfig{'autoenroll'}) eq 'HASH') {
4740: $settings = $domconfig{'autoenroll'};
4741: if ($settings->{'run'} eq '1') {
4742: $response = 1;
4743: }
4744: } else {
4745: my $homeserver = &homeserver($cnum,$cdom);
4746: $response = &reply('autorun:'.$cdom,$homeserver);
4747: }
4748: return $response;
4749: }
4750:
4751: sub auto_get_sections {
4752: my ($cnum,$cdom,$inst_coursecode) = @_;
4753: my $homeserver = &homeserver($cnum,$cdom);
4754: my @secs = ();
4755: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
4756: unless ($response eq 'refused') {
4757: @secs = split(/:/,$response);
4758: }
4759: return @secs;
4760: }
4761:
4762: sub auto_new_course {
4763: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
4764: my $homeserver = &homeserver($cnum,$cdom);
4765: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
4766: return $response;
4767: }
4768:
4769: sub auto_validate_courseID {
4770: my ($cnum,$cdom,$inst_course_id) = @_;
4771: my $homeserver = &homeserver($cnum,$cdom);
4772: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
4773: return $response;
4774: }
4775:
4776: sub auto_create_password {
4777: my ($cnum,$cdom,$authparam,$udom) = @_;
4778: my ($homeserver,$response);
4779: my $create_passwd = 0;
4780: my $authchk = '';
4781: if ($udom =~ /^$match_domain$/) {
4782: $homeserver = &domain($udom,'primary');
4783: }
4784: if ($homeserver eq '') {
4785: if (($cdom =~ /^$match_domain$/) && ($cnum =~ /^$match_courseid$/)) {
4786: $homeserver = &homeserver($cnum,$cdom);
4787: }
4788: }
4789: if ($homeserver eq '') {
4790: $authchk = 'nodomain';
4791: } else {
4792: $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
4793: if ($response eq 'refused') {
4794: $authchk = 'refused';
4795: } else {
4796: ($authparam,$create_passwd,$authchk) = split(/:/,$response);
4797: }
4798: }
4799: return ($authparam,$create_passwd,$authchk);
4800: }
4801:
4802: sub auto_photo_permission {
4803: my ($cnum,$cdom,$students) = @_;
4804: my $homeserver = &homeserver($cnum,$cdom);
4805: my ($outcome,$perm_reqd,$conditions) =
4806: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
4807: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4808: return (undef,undef);
4809: }
4810: return ($outcome,$perm_reqd,$conditions);
4811: }
4812:
4813: sub auto_checkphotos {
4814: my ($uname,$udom,$pid) = @_;
4815: my $homeserver = &homeserver($uname,$udom);
4816: my ($result,$resulttype);
4817: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
4818: &escape($uname).':'.&escape($pid),
4819: $homeserver));
4820: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4821: return (undef,undef);
4822: }
4823: if ($outcome) {
4824: ($result,$resulttype) = split(/:/,$outcome);
4825: }
4826: return ($result,$resulttype);
4827: }
4828:
4829: sub auto_photochoice {
4830: my ($cnum,$cdom) = @_;
4831: my $homeserver = &homeserver($cnum,$cdom);
4832: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
4833: &escape($cdom),
4834: $homeserver)));
4835: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4836: return (undef,undef);
4837: }
4838: return ($update,$comment);
4839: }
4840:
4841: sub auto_photoupdate {
4842: my ($affiliatesref,$dom,$cnum,$photo) = @_;
4843: my $homeserver = &homeserver($cnum,$dom);
4844: my $host=&hostname($homeserver);
4845: my $cmd = '';
4846: my $maxtries = 1;
4847: foreach my $affiliate (keys(%{$affiliatesref})) {
4848: $cmd .= $affiliate.'='.join(",",@{$$affiliatesref{$affiliate}}).'%%';
4849: }
4850: $cmd =~ s/%%$//;
4851: $cmd = &escape($cmd);
4852: my $query = 'institutionalphotos';
4853: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
4854: unless ($queryid=~/^\Q$host\E\_/) {
4855: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
4856: return 'error: '.$queryid;
4857: }
4858: my $reply = &get_query_reply($queryid);
4859: my $tries = 1;
4860: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4861: $reply = &get_query_reply($queryid);
4862: $tries ++;
4863: }
4864: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4865: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4866: } else {
4867: my @responses = split(/:/,$reply);
4868: my $outcome = shift(@responses);
4869: foreach my $item (@responses) {
4870: my ($key,$value) = split(/=/,$item);
4871: $$photo{$key} = $value;
4872: }
4873: return $outcome;
4874: }
4875: return 'error';
4876: }
4877:
4878: sub auto_instcode_format {
4879: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,
4880: $cat_order) = @_;
4881: my $courses = '';
4882: my @homeservers;
4883: if ($caller eq 'global') {
4884: my %servers = &get_servers($codedom,'library');
4885: foreach my $tryserver (keys(%servers)) {
4886: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4887: push(@homeservers,$tryserver);
4888: }
4889: }
4890: } else {
4891: push(@homeservers,&homeserver($caller,$codedom));
4892: }
4893: foreach my $code (keys(%{$instcodes})) {
4894: $courses .= &escape($code).'='.&escape($$instcodes{$code}).'&';
4895: }
4896: chop($courses);
4897: my $ok_response = 0;
4898: my $response;
4899: while (@homeservers > 0 && $ok_response == 0) {
4900: my $server = shift(@homeservers);
4901: $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$server);
4902: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4903: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) =
4904: split(/:/,$response);
4905: %{$codes} = (%{$codes},&str2hash($codes_str));
4906: push(@{$codetitles},&str2array($codetitles_str));
4907: %{$cat_titles} = (%{$cat_titles},&str2hash($cat_titles_str));
4908: %{$cat_order} = (%{$cat_order},&str2hash($cat_order_str));
4909: $ok_response = 1;
4910: }
4911: }
4912: if ($ok_response) {
4913: return 'ok';
4914: } else {
4915: return $response;
4916: }
4917: }
4918:
4919: sub auto_instcode_defaults {
4920: my ($domain,$returnhash,$code_order) = @_;
4921: my @homeservers;
4922:
4923: my %servers = &get_servers($domain,'library');
4924: foreach my $tryserver (keys(%servers)) {
4925: if (!grep(/^\Q$tryserver\E$/,@homeservers)) {
4926: push(@homeservers,$tryserver);
4927: }
4928: }
4929:
4930: my $response;
4931: foreach my $server (@homeservers) {
4932: $response=&reply('autoinstcodedefaults:'.$domain,$server);
4933: next if ($response =~ /(con_lost|error|no_such_host|refused)/);
4934:
4935: foreach my $pair (split(/\&/,$response)) {
4936: my ($name,$value)=split(/\=/,$pair);
4937: if ($name eq 'code_order') {
4938: @{$code_order} = split(/\&/,&unescape($value));
4939: } else {
4940: $returnhash->{&unescape($name)}=&unescape($value);
4941: }
4942: }
4943: return 'ok';
4944: }
4945:
4946: return $response;
4947: }
4948:
4949: sub auto_validate_class_sec {
4950: my ($cdom,$cnum,$owner,$inst_class) = @_;
4951: my $homeserver = &homeserver($cnum,$cdom);
4952: my $response=&reply('autovalidateclass_sec:'.$inst_class.':'.
4953: &escape($owner).':'.$cdom,$homeserver);
4954: return $response;
4955: }
4956:
4957: # ------------------------------------------------------- Course Group routines
4958:
4959: sub get_coursegroups {
4960: my ($cdom,$cnum,$group,$namespace) = @_;
4961: return(&dump($namespace,$cdom,$cnum,$group));
4962: }
4963:
4964: sub modify_coursegroup {
4965: my ($cdom,$cnum,$groupsettings) = @_;
4966: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
4967: }
4968:
4969: sub toggle_coursegroup_status {
4970: my ($cdom,$cnum,$group,$action) = @_;
4971: my ($from_namespace,$to_namespace);
4972: if ($action eq 'delete') {
4973: $from_namespace = 'coursegroups';
4974: $to_namespace = 'deleted_groups';
4975: } else {
4976: $from_namespace = 'deleted_groups';
4977: $to_namespace = 'coursegroups';
4978: }
4979: my %curr_group = &get_coursegroups($cdom,$cnum,$group,$from_namespace);
4980: if (my $tmp = &error(%curr_group)) {
4981: &Apache::lonnet::logthis('Error retrieving group: '.$tmp.' in '.$cnum.':'.$cdom);
4982: return ('read error',$tmp);
4983: } else {
4984: my %savedsettings = %curr_group;
4985: my $result = &put($to_namespace,\%savedsettings,$cdom,$cnum);
4986: my $deloutcome;
4987: if ($result eq 'ok') {
4988: $deloutcome = &del($from_namespace,[$group],$cdom,$cnum);
4989: } else {
4990: return ('write error',$result);
4991: }
4992: if ($deloutcome eq 'ok') {
4993: return 'ok';
4994: } else {
4995: return ('delete error',$deloutcome);
4996: }
4997: }
4998: }
4999:
5000: sub modify_group_roles {
5001: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
5002: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
5003: my $role = 'gr/'.&escape($userprivs);
5004: my ($uname,$udom) = split(/:/,$user);
5005: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
5006: if ($result eq 'ok') {
5007: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
5008: }
5009: return $result;
5010: }
5011:
5012: sub modify_coursegroup_membership {
5013: my ($cdom,$cnum,$membership) = @_;
5014: my $result = &put('groupmembership',$membership,$cdom,$cnum);
5015: return $result;
5016: }
5017:
5018: sub get_active_groups {
5019: my ($udom,$uname,$cdom,$cnum) = @_;
5020: my $now = time;
5021: my %groups = ();
5022: foreach my $key (keys(%env)) {
5023: if ($key =~ m-user\.role\.gr\./($match_domain)/($match_courseid)/(\w+)$-) {
5024: my ($start,$end) = split(/\./,$env{$key});
5025: if (($end!=0) && ($end<$now)) { next; }
5026: if (($start!=0) && ($start>$now)) { next; }
5027: if ($1 eq $cdom && $2 eq $cnum) {
5028: $groups{$3} = $env{$key} ;
5029: }
5030: }
5031: }
5032: return %groups;
5033: }
5034:
5035: sub get_group_membership {
5036: my ($cdom,$cnum,$group) = @_;
5037: return(&dump('groupmembership',$cdom,$cnum,$group));
5038: }
5039:
5040: sub get_users_groups {
5041: my ($udom,$uname,$courseid) = @_;
5042: my @usersgroups;
5043: my $cachetime=1800;
5044:
5045: my $hashid="$udom:$uname:$courseid";
5046: my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
5047: if (defined($cached)) {
5048: @usersgroups = split(/:/,$grouplist);
5049: } else {
5050: $grouplist = '';
5051: my $courseurl = &courseid_to_courseurl($courseid);
5052: my %roleshash = &dump('roles',$udom,$uname,$courseurl);
5053: my $access_end = $env{'course.'.$courseid.
5054: '.default_enrollment_end_date'};
5055: my $now = time;
5056: foreach my $key (keys(%roleshash)) {
5057: if ($key =~ /^\Q$courseurl\E\/(\w+)\_gr$/) {
5058: my $group = $1;
5059: if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
5060: my $start = $2;
5061: my $end = $1;
5062: if ($start == -1) { next; } # deleted from group
5063: if (($start!=0) && ($start>$now)) { next; }
5064: if (($end!=0) && ($end<$now)) {
5065: if ($access_end && $access_end < $now) {
5066: if ($access_end - $end < 86400) {
5067: push(@usersgroups,$group);
5068: }
5069: }
5070: next;
5071: }
5072: push(@usersgroups,$group);
5073: }
5074: }
5075: }
5076: @usersgroups = &sort_course_groups($courseid,@usersgroups);
5077: $grouplist = join(':',@usersgroups);
5078: &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
5079: }
5080: return @usersgroups;
5081: }
5082:
5083: sub devalidate_getgroups_cache {
5084: my ($udom,$uname,$cdom,$cnum)=@_;
5085: my $courseid = $cdom.'_'.$cnum;
5086:
5087: my $hashid="$udom:$uname:$courseid";
5088: &devalidate_cache_new('getgroups',$hashid);
5089: }
5090:
5091: # ------------------------------------------------------------------ Plain Text
5092:
5093: sub plaintext {
5094: my ($short,$type,$cid) = @_;
5095: if ($short =~ /^cr/) {
5096: return (split('/',$short))[-1];
5097: }
5098: if (!defined($cid)) {
5099: $cid = $env{'request.course.id'};
5100: }
5101: if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
5102: return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
5103: '.plaintext'});
5104: }
5105: my %rolenames = (
5106: Course => 'std',
5107: Group => 'alt1',
5108: );
5109: if (defined($type) &&
5110: defined($rolenames{$type}) &&
5111: defined($prp{$short}{$rolenames{$type}})) {
5112: return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
5113: } else {
5114: return &Apache::lonlocal::mt($prp{$short}{'std'});
5115: }
5116: }
5117:
5118: # ----------------------------------------------------------------- Assign Role
5119:
5120: sub assignrole {
5121: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
5122: my $mrole;
5123: if ($role =~ /^cr\//) {
5124: my $cwosec=$url;
5125: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
5126: unless (&allowed('ccr',$cwosec)) {
5127: &logthis('Refused custom assignrole: '.
5128: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
5129: $env{'user.name'}.' at '.$env{'user.domain'});
5130: return 'refused';
5131: }
5132: $mrole='cr';
5133: } elsif ($role =~ /^gr\//) {
5134: my $cwogrp=$url;
5135: $cwogrp=~s{^/($match_domain)/($match_courseid)/.*}{$1/$2};
5136: unless (&allowed('mdg',$cwogrp)) {
5137: &logthis('Refused group assignrole: '.
5138: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
5139: $env{'user.name'}.' at '.$env{'user.domain'});
5140: return 'refused';
5141: }
5142: $mrole='gr';
5143: } else {
5144: my $cwosec=$url;
5145: $cwosec=~s/^\/($match_domain)\/($match_courseid)\/.*/$1\/$2/;
5146: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
5147: &logthis('Refused assignrole: '.
5148: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
5149: $env{'user.name'}.' at '.$env{'user.domain'});
5150: return 'refused';
5151: }
5152: $mrole=$role;
5153: }
5154: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
5155: "$udom:$uname:$url".'_'."$mrole=$role";
5156: if ($end) { $command.='_'.$end; }
5157: if ($start) {
5158: if ($end) {
5159: $command.='_'.$start;
5160: } else {
5161: $command.='_0_'.$start;
5162: }
5163: }
5164: my $origstart = $start;
5165: my $origend = $end;
5166: # actually delete
5167: if ($deleteflag) {
5168: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
5169: # modify command to delete the role
5170: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
5171: "$udom:$uname:$url".'_'."$mrole";
5172: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
5173: # set start and finish to negative values for userrolelog
5174: $start=-1;
5175: $end=-1;
5176: }
5177: }
5178: # send command
5179: my $answer=&reply($command,&homeserver($uname,$udom));
5180: # log new user role if status is ok
5181: if ($answer eq 'ok') {
5182: &userrolelog($role,$uname,$udom,$url,$start,$end);
5183: # for course roles, perform group memberships changes triggered by role change.
5184: unless ($role =~ /^gr/) {
5185: &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
5186: $origstart);
5187: }
5188: }
5189: return $answer;
5190: }
5191:
5192: # -------------------------------------------------- Modify user authentication
5193: # Overrides without validation
5194:
5195: sub modifyuserauth {
5196: my ($udom,$uname,$umode,$upass)=@_;
5197: my $uhome=&homeserver($uname,$udom);
5198: unless (&allowed('mau',$udom)) { return 'refused'; }
5199: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
5200: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
5201: ' in domain '.$env{'request.role.domain'});
5202: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
5203: &escape($upass),$uhome);
5204: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
5205: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
5206: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
5207: &log($udom,,$uname,$uhome,
5208: 'Authentication changed by '.$env{'user.domain'}.', '.
5209: $env{'user.name'}.', '.$umode.
5210: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
5211: unless ($reply eq 'ok') {
5212: &logthis('Authentication mode error: '.$reply);
5213: return 'error: '.$reply;
5214: }
5215: return 'ok';
5216: }
5217:
5218: # --------------------------------------------------------------- Modify a user
5219:
5220: sub modifyuser {
5221: my ($udom, $uname, $uid,
5222: $umode, $upass, $first,
5223: $middle, $last, $gene,
5224: $forceid, $desiredhome, $email)=@_;
5225: $udom= &LONCAPA::clean_domain($udom);
5226: $uname=&LONCAPA::clean_username($uname);
5227: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
5228: $umode.', '.$first.', '.$middle.', '.
5229: $last.', '.$gene.'(forceid: '.$forceid.')'.
5230: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
5231: ' desiredhome not specified').
5232: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
5233: ' in domain '.$env{'request.role.domain'});
5234: my $uhome=&homeserver($uname,$udom,'true');
5235: # ----------------------------------------------------------------- Create User
5236: if (($uhome eq 'no_host') &&
5237: (($umode && $upass) || ($umode eq 'localauth'))) {
5238: my $unhome='';
5239: if (defined($desiredhome) && &host_domain($desiredhome) eq $udom) {
5240: $unhome = $desiredhome;
5241: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
5242: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
5243: } else { # load balancing routine for determining $unhome
5244: my $loadm=10000000;
5245: my %servers = &get_servers($udom,'library');
5246: foreach my $tryserver (keys(%servers)) {
5247: my $answer=reply('load',$tryserver);
5248: if (($answer=~/\d+/) && ($answer<$loadm)) {
5249: $loadm=$answer;
5250: $unhome=$tryserver;
5251: }
5252: }
5253: }
5254: if (($unhome eq '') || ($unhome eq 'no_host')) {
5255: return 'error: unable to find a home server for '.$uname.
5256: ' in domain '.$udom;
5257: }
5258: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
5259: &escape($upass),$unhome);
5260: unless ($reply eq 'ok') {
5261: return 'error: '.$reply;
5262: }
5263: $uhome=&homeserver($uname,$udom,'true');
5264: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
5265: return 'error: unable verify users home machine.';
5266: }
5267: } # End of creation of new user
5268: # ---------------------------------------------------------------------- Add ID
5269: if ($uid) {
5270: $uid=~tr/A-Z/a-z/;
5271: my %uidhash=&idrget($udom,$uname);
5272: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
5273: && (!$forceid)) {
5274: unless ($uid eq $uidhash{$uname}) {
5275: return 'error: user id "'.$uid.'" does not match '.
5276: 'current user id "'.$uidhash{$uname}.'".';
5277: }
5278: } else {
5279: &idput($udom,($uname => $uid));
5280: }
5281: }
5282: # -------------------------------------------------------------- Add names, etc
5283: my @tmp=&get('environment',
5284: ['firstname','middlename','lastname','generation','id',
5285: 'permanentemail'],
5286: $udom,$uname);
5287: my %names;
5288: if ($tmp[0] =~ m/^error:.*/) {
5289: %names=();
5290: } else {
5291: %names = @tmp;
5292: }
5293: #
5294: # Make sure to not trash student environment if instructor does not bother
5295: # to supply name and email information
5296: #
5297: if ($first) { $names{'firstname'} = $first; }
5298: if (defined($middle)) { $names{'middlename'} = $middle; }
5299: if ($last) { $names{'lastname'} = $last; }
5300: if (defined($gene)) { $names{'generation'} = $gene; }
5301: if ($email) {
5302: $email=~s/[^\w\@\.\-\,]//gs;
5303: if ($email=~/\@/) { $names{'notification'} = $email;
5304: $names{'critnotification'} = $email;
5305: $names{'permanentemail'} = $email; }
5306: }
5307: if ($uid) { $names{'id'} = $uid; }
5308: my $reply = &put('environment', \%names, $udom,$uname);
5309: if ($reply ne 'ok') { return 'error: '.$reply; }
5310: my $sqlresult = &update_allusers_table($uname,$udom,\%names);
5311: &devalidate_cache_new('namescache',$uname.':'.$udom);
5312: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
5313: $umode.', '.$first.', '.$middle.', '.
5314: $last.', '.$gene.' by '.
5315: $env{'user.name'}.' at '.$env{'user.domain'});
5316: return 'ok';
5317: }
5318:
5319: # -------------------------------------------------------------- Modify student
5320:
5321: sub modifystudent {
5322: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
5323: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
5324: if (!$cid) {
5325: unless ($cid=$env{'request.course.id'}) {
5326: return 'not_in_class';
5327: }
5328: }
5329: # --------------------------------------------------------------- Make the user
5330: my $reply=&modifyuser
5331: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
5332: $desiredhome,$email);
5333: unless ($reply eq 'ok') { return $reply; }
5334: # This will cause &modify_student_enrollment to get the uid from the
5335: # students environment
5336: $uid = undef if (!$forceid);
5337: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
5338: $gene,$usec,$end,$start,$type,$locktype,$cid);
5339: return $reply;
5340: }
5341:
5342: sub modify_student_enrollment {
5343: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
5344: my ($cdom,$cnum,$chome);
5345: if (!$cid) {
5346: unless ($cid=$env{'request.course.id'}) {
5347: return 'not_in_class';
5348: }
5349: $cdom=$env{'course.'.$cid.'.domain'};
5350: $cnum=$env{'course.'.$cid.'.num'};
5351: } else {
5352: ($cdom,$cnum)=split(/_/,$cid);
5353: }
5354: $chome=$env{'course.'.$cid.'.home'};
5355: if (!$chome) {
5356: $chome=&homeserver($cnum,$cdom);
5357: }
5358: if (!$chome) { return 'unknown_course'; }
5359: # Make sure the user exists
5360: my $uhome=&homeserver($uname,$udom);
5361: if (($uhome eq '') || ($uhome eq 'no_host')) {
5362: return 'error: no such user';
5363: }
5364: # Get student data if we were not given enough information
5365: if (!defined($first) || $first eq '' ||
5366: !defined($last) || $last eq '' ||
5367: !defined($uid) || $uid eq '' ||
5368: !defined($middle) || $middle eq '' ||
5369: !defined($gene) || $gene eq '') {
5370: # They did not supply us with enough data to enroll the student, so
5371: # we need to pick up more information.
5372: my %tmp = &get('environment',
5373: ['firstname','middlename','lastname', 'generation','id']
5374: ,$udom,$uname);
5375:
5376: #foreach my $key (keys(%tmp)) {
5377: # &logthis("key $key = ".$tmp{$key});
5378: #}
5379: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
5380: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
5381: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
5382: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
5383: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
5384: }
5385: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
5386: my $reply=cput('classlist',
5387: {"$uname:$udom" =>
5388: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
5389: $cdom,$cnum);
5390: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
5391: return 'error: '.$reply;
5392: } else {
5393: &devalidate_getsection_cache($udom,$uname,$cid);
5394: }
5395: # Add student role to user
5396: my $uurl='/'.$cid;
5397: $uurl=~s/\_/\//g;
5398: if ($usec) {
5399: $uurl.='/'.$usec;
5400: }
5401: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
5402: }
5403:
5404: sub format_name {
5405: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
5406: my $name;
5407: if ($first ne 'lastname') {
5408: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
5409: } else {
5410: if ($lastname=~/\S/) {
5411: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
5412: $name=~s/\s+,/,/;
5413: } else {
5414: $name.= $firstname.' '.$middlename.' '.$generation;
5415: }
5416: }
5417: $name=~s/^\s+//;
5418: $name=~s/\s+$//;
5419: $name=~s/\s+/ /g;
5420: return $name;
5421: }
5422:
5423: # ------------------------------------------------- Write to course preferences
5424:
5425: sub writecoursepref {
5426: my ($courseid,%prefs)=@_;
5427: $courseid=~s/^\///;
5428: $courseid=~s/\_/\//g;
5429: my ($cdomain,$cnum)=split(/\//,$courseid);
5430: my $chome=homeserver($cnum,$cdomain);
5431: if (($chome eq '') || ($chome eq 'no_host')) {
5432: return 'error: no such course';
5433: }
5434: my $cstring='';
5435: foreach my $pref (keys(%prefs)) {
5436: $cstring.=&escape($pref).'='.&escape($prefs{$pref}).'&';
5437: }
5438: $cstring=~s/\&$//;
5439: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
5440: }
5441:
5442: # ---------------------------------------------------------- Make/modify course
5443:
5444: sub createcourse {
5445: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
5446: $course_owner,$crstype)=@_;
5447: $url=&declutter($url);
5448: my $cid='';
5449: unless (&allowed('ccc',$udom)) {
5450: return 'refused';
5451: }
5452: # ------------------------------------------------------------------- Create ID
5453: my $uname=int(1+rand(9)).
5454: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
5455: substr($$.time,0,5).unpack("H8",pack("I32",time)).
5456: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5457: # ----------------------------------------------- Make sure that does not exist
5458: my $uhome=&homeserver($uname,$udom,'true');
5459: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5460: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
5461: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
5462: $uhome=&homeserver($uname,$udom,'true');
5463: unless (($uhome eq '') || ($uhome eq 'no_host')) {
5464: return 'error: unable to generate unique course-ID';
5465: }
5466: }
5467: # ------------------------------------------------ Check supplied server name
5468: $course_server = $env{'user.homeserver'} if (! defined($course_server));
5469: if (! &is_library($course_server)) {
5470: return 'error:bad server name '.$course_server;
5471: }
5472: # ------------------------------------------------------------- Make the course
5473: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
5474: $course_server);
5475: unless ($reply eq 'ok') { return 'error: '.$reply; }
5476: $uhome=&homeserver($uname,$udom,'true');
5477: if (($uhome eq '') || ($uhome eq 'no_host')) {
5478: return 'error: no such course';
5479: }
5480: # ----------------------------------------------------------------- Course made
5481: # log existence
5482: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
5483: ':'.&escape($inst_code).':'.&escape($course_owner).':'.
5484: &escape($crstype),$uhome);
5485: &flushcourselogs();
5486: # set toplevel url
5487: my $topurl=$url;
5488: unless ($nonstandard) {
5489: # ------------------------------------------ For standard courses, make top url
5490: my $mapurl=&clutter($url);
5491: if ($mapurl eq '/res/') { $mapurl=''; }
5492: $env{'form.initmap'}=(<<ENDINITMAP);
5493: <map>
5494: <resource id="1" type="start"></resource>
5495: <resource id="2" src="$mapurl"></resource>
5496: <resource id="3" type="finish"></resource>
5497: <link index="1" from="1" to="2"></link>
5498: <link index="2" from="2" to="3"></link>
5499: </map>
5500: ENDINITMAP
5501: $topurl=&declutter(
5502: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
5503: );
5504: }
5505: # ----------------------------------------------------------- Write preferences
5506: &writecoursepref($udom.'_'.$uname,
5507: ('description' => $description,
5508: 'url' => $topurl));
5509: return '/'.$udom.'/'.$uname;
5510: }
5511:
5512: sub is_course {
5513: my ($cdom,$cnum) = @_;
5514: my %courses = &courseiddump($cdom,'.',1,'.','.',$cnum,undef,
5515: undef,'.');
5516: if (exists($courses{$cdom.'_'.$cnum})) {
5517: return 1;
5518: }
5519: return 0;
5520: }
5521:
5522: # ---------------------------------------------------------- Assign Custom Role
5523:
5524: sub assigncustomrole {
5525: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
5526: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
5527: $end,$start,$deleteflag);
5528: }
5529:
5530: # ----------------------------------------------------------------- Revoke Role
5531:
5532: sub revokerole {
5533: my ($udom,$uname,$url,$role,$deleteflag)=@_;
5534: my $now=time;
5535: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
5536: }
5537:
5538: # ---------------------------------------------------------- Revoke Custom Role
5539:
5540: sub revokecustomrole {
5541: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
5542: my $now=time;
5543: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
5544: $deleteflag);
5545: }
5546:
5547: # ------------------------------------------------------------ Disk usage
5548: sub diskusage {
5549: my ($udom,$uname,$directoryRoot)=@_;
5550: $directoryRoot =~ s/\/$//;
5551: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
5552: return $listing;
5553: }
5554:
5555: sub is_locked {
5556: my ($file_name, $domain, $user) = @_;
5557: my @check;
5558: my $is_locked;
5559: push @check, $file_name;
5560: my %locked = &get('file_permissions',\@check,
5561: $env{'user.domain'},$env{'user.name'});
5562: my ($tmp)=keys(%locked);
5563: if ($tmp=~/^error:/) { undef(%locked); }
5564:
5565: if (ref($locked{$file_name}) eq 'ARRAY') {
5566: $is_locked = 'false';
5567: foreach my $entry (@{$locked{$file_name}}) {
5568: if (ref($entry) eq 'ARRAY') {
5569: $is_locked = 'true';
5570: last;
5571: }
5572: }
5573: } else {
5574: $is_locked = 'false';
5575: }
5576: }
5577:
5578: sub declutter_portfile {
5579: my ($file) = @_;
5580: $file =~ s{^(/portfolio/|portfolio/)}{/};
5581: return $file;
5582: }
5583:
5584: # ------------------------------------------------------------- Mark as Read Only
5585:
5586: sub mark_as_readonly {
5587: my ($domain,$user,$files,$what) = @_;
5588: my %current_permissions = &dump('file_permissions',$domain,$user);
5589: my ($tmp)=keys(%current_permissions);
5590: if ($tmp=~/^error:/) { undef(%current_permissions); }
5591: foreach my $file (@{$files}) {
5592: $file = &declutter_portfile($file);
5593: push(@{$current_permissions{$file}},$what);
5594: }
5595: &put('file_permissions',\%current_permissions,$domain,$user);
5596: return;
5597: }
5598:
5599: # ------------------------------------------------------------Save Selected Files
5600:
5601: sub save_selected_files {
5602: my ($user, $path, @files) = @_;
5603: my $filename = $user."savedfiles";
5604: my @other_files = &files_not_in_path($user, $path);
5605: open (OUT, '>'.$tmpdir.$filename);
5606: foreach my $file (@files) {
5607: print (OUT $env{'form.currentpath'}.$file."\n");
5608: }
5609: foreach my $file (@other_files) {
5610: print (OUT $file."\n");
5611: }
5612: close (OUT);
5613: return 'ok';
5614: }
5615:
5616: sub clear_selected_files {
5617: my ($user) = @_;
5618: my $filename = $user."savedfiles";
5619: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5620: print (OUT undef);
5621: close (OUT);
5622: return ("ok");
5623: }
5624:
5625: sub files_in_path {
5626: my ($user, $path) = @_;
5627: my $filename = $user."savedfiles";
5628: my %return_files;
5629: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5630: while (my $line_in = <IN>) {
5631: chomp ($line_in);
5632: my @paths_and_file = split (m!/!, $line_in);
5633: my $file_part = pop (@paths_and_file);
5634: my $path_part = join ('/', @paths_and_file);
5635: $path_part.='/';
5636: my $path_and_file = $path_part.$file_part;
5637: if ($path_part eq $path) {
5638: $return_files{$file_part}= 'selected';
5639: }
5640: }
5641: close (IN);
5642: return (\%return_files);
5643: }
5644:
5645: # called in portfolio select mode, to show files selected NOT in current directory
5646: sub files_not_in_path {
5647: my ($user, $path) = @_;
5648: my $filename = $user."savedfiles";
5649: my @return_files;
5650: my $path_part;
5651: open(IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
5652: while (my $line = <IN>) {
5653: #ok, I know it's clunky, but I want it to work
5654: my @paths_and_file = split(m|/|, $line);
5655: my $file_part = pop(@paths_and_file);
5656: chomp($file_part);
5657: my $path_part = join('/', @paths_and_file);
5658: $path_part .= '/';
5659: my $path_and_file = $path_part.$file_part;
5660: if ($path_part ne $path) {
5661: push(@return_files, ($path_and_file));
5662: }
5663: }
5664: close(OUT);
5665: return (@return_files);
5666: }
5667:
5668: #----------------------------------------------Get portfolio file permissions
5669:
5670: sub get_portfile_permissions {
5671: my ($domain,$user) = @_;
5672: my %current_permissions = &dump('file_permissions',$domain,$user);
5673: my ($tmp)=keys(%current_permissions);
5674: if ($tmp=~/^error:/) { undef(%current_permissions); }
5675: return \%current_permissions;
5676: }
5677:
5678: #---------------------------------------------Get portfolio file access controls
5679:
5680: sub get_access_controls {
5681: my ($current_permissions,$group,$file) = @_;
5682: my %access;
5683: my $real_file = $file;
5684: $file =~ s/\.meta$//;
5685: if (defined($file)) {
5686: if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
5687: foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
5688: $access{$real_file}{$control} = $$current_permissions{$file."\0".$control};
5689: }
5690: }
5691: } else {
5692: foreach my $key (keys(%{$current_permissions})) {
5693: if ($key =~ /\0accesscontrol$/) {
5694: if (defined($group)) {
5695: if ($key !~ m-^\Q$group\E/-) {
5696: next;
5697: }
5698: }
5699: my ($fullpath) = split(/\0/,$key);
5700: if (ref($$current_permissions{$key}) eq 'HASH') {
5701: foreach my $control (keys(%{$$current_permissions{$key}})) {
5702: $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
5703: }
5704: }
5705: }
5706: }
5707: }
5708: return %access;
5709: }
5710:
5711: sub modify_access_controls {
5712: my ($file_name,$changes,$domain,$user)=@_;
5713: my ($outcome,$deloutcome);
5714: my %store_permissions;
5715: my %new_values;
5716: my %new_control;
5717: my %translation;
5718: my @deletions = ();
5719: my $now = time;
5720: if (exists($$changes{'activate'})) {
5721: if (ref($$changes{'activate'}) eq 'HASH') {
5722: my @newitems = sort(keys(%{$$changes{'activate'}}));
5723: my $numnew = scalar(@newitems);
5724: for (my $i=0; $i<$numnew; $i++) {
5725: my $newkey = $newitems[$i];
5726: my $newid = &Apache::loncommon::get_cgi_id();
5727: if ($newkey =~ /^\d+:/) {
5728: $newkey =~ s/^(\d+)/$newid/;
5729: $translation{$1} = $newid;
5730: } elsif ($newkey =~ /^\d+_\d+_\d+:/) {
5731: $newkey =~ s/^(\d+_\d+_\d+)/$newid/;
5732: $translation{$1} = $newid;
5733: }
5734: $new_values{$file_name."\0".$newkey} =
5735: $$changes{'activate'}{$newitems[$i]};
5736: $new_control{$newkey} = $now;
5737: }
5738: }
5739: }
5740: my %todelete;
5741: my %changed_items;
5742: foreach my $action ('delete','update') {
5743: if (exists($$changes{$action})) {
5744: if (ref($$changes{$action}) eq 'HASH') {
5745: foreach my $key (keys(%{$$changes{$action}})) {
5746: my ($itemnum) = ($key =~ /^([^:]+):/);
5747: if ($action eq 'delete') {
5748: $todelete{$itemnum} = 1;
5749: } else {
5750: $changed_items{$itemnum} = $key;
5751: }
5752: }
5753: }
5754: }
5755: }
5756: # get lock on access controls for file.
5757: my $lockhash = {
5758: $file_name."\0".'locked_access_records' => $env{'user.name'}.
5759: ':'.$env{'user.domain'},
5760: };
5761: my $tries = 0;
5762: my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5763:
5764: while (($gotlock ne 'ok') && $tries <3) {
5765: $tries ++;
5766: sleep 1;
5767: $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5768: }
5769: if ($gotlock eq 'ok') {
5770: my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
5771: my ($tmp)=keys(%curr_permissions);
5772: if ($tmp=~/^error:/) { undef(%curr_permissions); }
5773: if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
5774: my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
5775: if (ref($curr_controls) eq 'HASH') {
5776: foreach my $control_item (keys(%{$curr_controls})) {
5777: my ($itemnum) = ($control_item =~ /^([^:]+):/);
5778: if (defined($todelete{$itemnum})) {
5779: push(@deletions,$file_name."\0".$control_item);
5780: } else {
5781: if (defined($changed_items{$itemnum})) {
5782: $new_control{$changed_items{$itemnum}} = $now;
5783: push(@deletions,$file_name."\0".$control_item);
5784: $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
5785: } else {
5786: $new_control{$control_item} = $$curr_controls{$control_item};
5787: }
5788: }
5789: }
5790: }
5791: }
5792: $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
5793: $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
5794: $outcome = &put('file_permissions',\%new_values,$domain,$user);
5795: # remove lock
5796: my @del_lock = ($file_name."\0".'locked_access_records');
5797: my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
5798: my ($file,$group);
5799: if (&is_course($domain,$user)) {
5800: ($group,$file) = split(/\//,$file_name,2);
5801: } else {
5802: $file = $file_name;
5803: }
5804: my $sqlresult =
5805: &update_portfolio_table($user,$domain,$file,'portfolio_access',
5806: $group);
5807: } else {
5808: $outcome = "error: could not obtain lockfile\n";
5809: }
5810: return ($outcome,$deloutcome,\%new_values,\%translation);
5811: }
5812:
5813: sub make_public_indefinitely {
5814: my ($requrl) = @_;
5815: my $now = time;
5816: my $action = 'activate';
5817: my $aclnum = 0;
5818: if (&is_portfolio_url($requrl)) {
5819: my (undef,$udom,$unum,$file_name,$group) =
5820: &parse_portfolio_url($requrl);
5821: my $current_perms = &get_portfile_permissions($udom,$unum);
5822: my %access_controls = &get_access_controls($current_perms,
5823: $group,$file_name);
5824: foreach my $key (keys(%{$access_controls{$file_name}})) {
5825: my ($num,$scope,$end,$start) =
5826: ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
5827: if ($scope eq 'public') {
5828: if ($start <= $now && $end == 0) {
5829: $action = 'none';
5830: } else {
5831: $action = 'update';
5832: $aclnum = $num;
5833: }
5834: last;
5835: }
5836: }
5837: if ($action eq 'none') {
5838: return 'ok';
5839: } else {
5840: my %changes;
5841: my $newend = 0;
5842: my $newstart = $now;
5843: my $newkey = $aclnum.':public_'.$newend.'_'.$newstart;
5844: $changes{$action}{$newkey} = {
5845: type => 'public',
5846: time => {
5847: start => $newstart,
5848: end => $newend,
5849: },
5850: };
5851: my ($outcome,$deloutcome,$new_values,$translation) =
5852: &modify_access_controls($file_name,\%changes,$udom,$unum);
5853: return $outcome;
5854: }
5855: } else {
5856: return 'invalid';
5857: }
5858: }
5859:
5860: #------------------------------------------------------Get Marked as Read Only
5861:
5862: sub get_marked_as_readonly {
5863: my ($domain,$user,$what,$group) = @_;
5864: my $current_permissions = &get_portfile_permissions($domain,$user);
5865: my @readonly_files;
5866: my $cmp1=$what;
5867: if (ref($what)) { $cmp1=join('',@{$what}) };
5868: while (my ($file_name,$value) = each(%{$current_permissions})) {
5869: if (defined($group)) {
5870: if ($file_name !~ m-^\Q$group\E/-) {
5871: next;
5872: }
5873: }
5874: if (ref($value) eq "ARRAY"){
5875: foreach my $stored_what (@{$value}) {
5876: my $cmp2=$stored_what;
5877: if (ref($stored_what) eq 'ARRAY') {
5878: $cmp2=join('',@{$stored_what});
5879: }
5880: if ($cmp1 eq $cmp2) {
5881: push(@readonly_files, $file_name);
5882: last;
5883: } elsif (!defined($what)) {
5884: push(@readonly_files, $file_name);
5885: last;
5886: }
5887: }
5888: }
5889: }
5890: return @readonly_files;
5891: }
5892: #-----------------------------------------------------------Get Marked as Read Only Hash
5893:
5894: sub get_marked_as_readonly_hash {
5895: my ($current_permissions,$group,$what) = @_;
5896: my %readonly_files;
5897: while (my ($file_name,$value) = each(%{$current_permissions})) {
5898: if (defined($group)) {
5899: if ($file_name !~ m-^\Q$group\E/-) {
5900: next;
5901: }
5902: }
5903: if (ref($value) eq "ARRAY"){
5904: foreach my $stored_what (@{$value}) {
5905: if (ref($stored_what) eq 'ARRAY') {
5906: foreach my $lock_descriptor(@{$stored_what}) {
5907: if ($lock_descriptor eq 'graded') {
5908: $readonly_files{$file_name} = 'graded';
5909: } elsif ($lock_descriptor eq 'handback') {
5910: $readonly_files{$file_name} = 'handback';
5911: } else {
5912: if (!exists($readonly_files{$file_name})) {
5913: $readonly_files{$file_name} = 'locked';
5914: }
5915: }
5916: }
5917: }
5918: }
5919: }
5920: }
5921: return %readonly_files;
5922: }
5923: # ------------------------------------------------------------ Unmark as Read Only
5924:
5925: sub unmark_as_readonly {
5926: # unmarks $file_name (if $file_name is defined), or all files locked by $what
5927: # for portfolio submissions, $what contains [$symb,$crsid]
5928: my ($domain,$user,$what,$file_name,$group) = @_;
5929: $file_name = &declutter_portfile($file_name);
5930: my $symb_crs = $what;
5931: if (ref($what)) { $symb_crs=join('',@$what); }
5932: my %current_permissions = &dump('file_permissions',$domain,$user,$group);
5933: my ($tmp)=keys(%current_permissions);
5934: if ($tmp=~/^error:/) { undef(%current_permissions); }
5935: my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
5936: foreach my $file (@readonly_files) {
5937: my $clean_file = &declutter_portfile($file);
5938: if (defined($file_name) && ($file_name ne $clean_file)) { next; }
5939: my $current_locks = $current_permissions{$file};
5940: my @new_locks;
5941: my @del_keys;
5942: if (ref($current_locks) eq "ARRAY"){
5943: foreach my $locker (@{$current_locks}) {
5944: my $compare=$locker;
5945: if (ref($locker) eq 'ARRAY') {
5946: $compare=join('',@{$locker});
5947: if ($compare ne $symb_crs) {
5948: push(@new_locks, $locker);
5949: }
5950: }
5951: }
5952: if (scalar(@new_locks) > 0) {
5953: $current_permissions{$file} = \@new_locks;
5954: } else {
5955: push(@del_keys, $file);
5956: &del('file_permissions',\@del_keys, $domain, $user);
5957: delete($current_permissions{$file});
5958: }
5959: }
5960: }
5961: &put('file_permissions',\%current_permissions,$domain,$user);
5962: return;
5963: }
5964:
5965: # ------------------------------------------------------------ Directory lister
5966:
5967: sub dirlist {
5968: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
5969:
5970: $uri=~s/^\///;
5971: $uri=~s/\/$//;
5972: my ($udom, $uname);
5973: (undef,$udom,$uname)=split(/\//,$uri);
5974: if(defined($userdomain)) {
5975: $udom = $userdomain;
5976: }
5977: if(defined($username)) {
5978: $uname = $username;
5979: }
5980:
5981: my $dirRoot = $perlvar{'lonDocRoot'};
5982: if(defined($alternateDirectoryRoot)) {
5983: $dirRoot = $alternateDirectoryRoot;
5984: $dirRoot =~ s/\/$//;
5985: }
5986:
5987: if($udom) {
5988: if($uname) {
5989: my $listing = &reply('ls2:'.$dirRoot.'/'.$uri,
5990: &homeserver($uname,$udom));
5991: my @listing_results;
5992: if ($listing eq 'unknown_cmd') {
5993: $listing = &reply('ls:'.$dirRoot.'/'.$uri,
5994: &homeserver($uname,$udom));
5995: @listing_results = split(/:/,$listing);
5996: } else {
5997: @listing_results = map { &unescape($_); } split(/:/,$listing);
5998: }
5999: return @listing_results;
6000: } elsif(!defined($alternateDirectoryRoot)) {
6001: my %allusers;
6002: my %servers = &get_servers($udom,'library');
6003: foreach my $tryserver (keys(%servers)) {
6004: my $listing = &reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
6005: $udom, $tryserver);
6006: my @listing_results;
6007: if ($listing eq 'unknown_cmd') {
6008: $listing = &reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
6009: $udom, $tryserver);
6010: @listing_results = split(/:/,$listing);
6011: } else {
6012: @listing_results =
6013: map { &unescape($_); } split(/:/,$listing);
6014: }
6015: if ($listing_results[0] ne 'no_such_dir' &&
6016: $listing_results[0] ne 'empty' &&
6017: $listing_results[0] ne 'con_lost') {
6018: foreach my $line (@listing_results) {
6019: my ($entry) = split(/&/,$line,2);
6020: $allusers{$entry} = 1;
6021: }
6022: }
6023: }
6024: my $alluserstr='';
6025: foreach my $user (sort(keys(%allusers))) {
6026: $alluserstr.=$user.'&user:';
6027: }
6028: $alluserstr=~s/:$//;
6029: return split(/:/,$alluserstr);
6030: } else {
6031: return ('missing user name');
6032: }
6033: } elsif(!defined($alternateDirectoryRoot)) {
6034: my @all_domains = sort(&all_domains());
6035: foreach my $domain (@all_domains) {
6036: $domain = $perlvar{'lonDocRoot'}.'/res/'.$domain.'/&domain';
6037: }
6038: return @all_domains;
6039: } else {
6040: return ('missing domain');
6041: }
6042: }
6043:
6044: # --------------------------------------------- GetFileTimestamp
6045: # This function utilizes dirlist and returns the date stamp for
6046: # when it was last modified. It will also return an error of -1
6047: # if an error occurs
6048:
6049: ##
6050: ## FIXME: This subroutine assumes its caller knows something about the
6051: ## directory structure of the home server for the student ($root).
6052: ## Not a good assumption to make. Since this is for looking up files
6053: ## in user directories, the full path should be constructed by lond, not
6054: ## whatever machine we request data from.
6055: ##
6056: sub GetFileTimestamp {
6057: my ($studentDomain,$studentName,$filename,$root)=@_;
6058: $studentDomain = &LONCAPA::clean_domain($studentDomain);
6059: $studentName = &LONCAPA::clean_username($studentName);
6060: my $subdir=$studentName.'__';
6061: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
6062: my $proname="$studentDomain/$subdir/$studentName";
6063: $proname .= '/'.$filename;
6064: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
6065: $studentName, $root);
6066: my @stats = split('&', $fileStat);
6067: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
6068: # @stats contains first the filename, then the stat output
6069: return $stats[10]; # so this is 10 instead of 9.
6070: } else {
6071: return -1;
6072: }
6073: }
6074:
6075: sub stat_file {
6076: my ($uri) = @_;
6077: $uri = &clutter_with_no_wrapper($uri);
6078:
6079: my ($udom,$uname,$file,$dir);
6080: if ($uri =~ m-^/(uploaded|editupload)/-) {
6081: ($udom,$uname,$file) =
6082: ($uri =~ m-/(?:uploaded|editupload)/?($match_domain)/?($match_name)/?(.*)-);
6083: $file = 'userfiles/'.$file;
6084: $dir = &propath($udom,$uname);
6085: }
6086: if ($uri =~ m-^/res/-) {
6087: ($udom,$uname) =
6088: ($uri =~ m-/(?:res)/?($match_domain)/?($match_username)/-);
6089: $file = $uri;
6090: }
6091:
6092: if (!$udom || !$uname || !$file) {
6093: # unable to handle the uri
6094: return ();
6095: }
6096:
6097: my ($result) = &dirlist($file,$udom,$uname,$dir);
6098: my @stats = split('&', $result);
6099:
6100: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
6101: shift(@stats); #filename is first
6102: return @stats;
6103: }
6104: return ();
6105: }
6106:
6107: # -------------------------------------------------------- Value of a Condition
6108:
6109: # gets the value of a specific preevaluated condition
6110: # stored in the string $env{user.state.<cid>}
6111: # or looks up a condition reference in the bighash and if if hasn't
6112: # already been evaluated recurses into docondval to get the value of
6113: # the condition, then memoizing it to
6114: # $env{user.state.<cid>.<condition>}
6115: sub directcondval {
6116: my $number=shift;
6117: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
6118: &Apache::lonuserstate::evalstate();
6119: }
6120: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
6121: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
6122: } elsif ($number =~ /^_/) {
6123: my $sub_condition;
6124: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6125: &GDBM_READER(),0640)) {
6126: $sub_condition=$bighash{'conditions'.$number};
6127: untie(%bighash);
6128: }
6129: my $value = &docondval($sub_condition);
6130: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
6131: return $value;
6132: }
6133: if ($env{'user.state.'.$env{'request.course.id'}}) {
6134: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
6135: } else {
6136: return 2;
6137: }
6138: }
6139:
6140: # get the collection of conditions for this resource
6141: sub condval {
6142: my $condidx=shift;
6143: my $allpathcond='';
6144: foreach my $cond (split(/\|/,$condidx)) {
6145: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
6146: $allpathcond.=
6147: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
6148: }
6149: }
6150: $allpathcond=~s/\|$//;
6151: return &docondval($allpathcond);
6152: }
6153:
6154: #evaluates an expression of conditions
6155: sub docondval {
6156: my ($allpathcond) = @_;
6157: my $result=0;
6158: if ($env{'request.course.id'}
6159: && defined($allpathcond)) {
6160: my $operand='|';
6161: my @stack;
6162: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
6163: if ($chunk eq '(') {
6164: push @stack,($operand,$result);
6165: } elsif ($chunk eq ')') {
6166: my $before=pop @stack;
6167: if (pop @stack eq '&') {
6168: $result=$result>$before?$before:$result;
6169: } else {
6170: $result=$result>$before?$result:$before;
6171: }
6172: } elsif (($chunk eq '&') || ($chunk eq '|')) {
6173: $operand=$chunk;
6174: } else {
6175: my $new=directcondval($chunk);
6176: if ($operand eq '&') {
6177: $result=$result>$new?$new:$result;
6178: } else {
6179: $result=$result>$new?$result:$new;
6180: }
6181: }
6182: }
6183: }
6184: return $result;
6185: }
6186:
6187: # ---------------------------------------------------- Devalidate courseresdata
6188:
6189: sub devalidatecourseresdata {
6190: my ($coursenum,$coursedomain)=@_;
6191: my $hashid=$coursenum.':'.$coursedomain;
6192: &devalidate_cache_new('courseres',$hashid);
6193: }
6194:
6195:
6196: # --------------------------------------------------- Course Resourcedata Query
6197: #
6198: # Parameters:
6199: # $coursenum - Number of the course.
6200: # $coursedomain - Domain at which the course was created.
6201: # Returns:
6202: # A hash of the course parameters along (I think) with timestamps
6203: # and version info.
6204:
6205: sub get_courseresdata {
6206: my ($coursenum,$coursedomain)=@_;
6207: my $coursehom=&homeserver($coursenum,$coursedomain);
6208: my $hashid=$coursenum.':'.$coursedomain;
6209: my ($result,$cached)=&is_cached_new('courseres',$hashid);
6210: my %dumpreply;
6211: unless (defined($cached)) {
6212: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
6213: $result=\%dumpreply;
6214: my ($tmp) = keys(%dumpreply);
6215: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
6216: &do_cache_new('courseres',$hashid,$result,600);
6217: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
6218: return $tmp;
6219: } elsif ($tmp =~ /^(error)/) {
6220: $result=undef;
6221: &do_cache_new('courseres',$hashid,$result,600);
6222: }
6223: }
6224: return $result;
6225: }
6226:
6227: sub devalidateuserresdata {
6228: my ($uname,$udom)=@_;
6229: my $hashid="$udom:$uname";
6230: &devalidate_cache_new('userres',$hashid);
6231: }
6232:
6233: sub get_userresdata {
6234: my ($uname,$udom)=@_;
6235: #most student don\'t have any data set, check if there is some data
6236: if (&EXT_cache_status($udom,$uname)) { return undef; }
6237:
6238: my $hashid="$udom:$uname";
6239: my ($result,$cached)=&is_cached_new('userres',$hashid);
6240: if (!defined($cached)) {
6241: my %resourcedata=&dump('resourcedata',$udom,$uname);
6242: $result=\%resourcedata;
6243: &do_cache_new('userres',$hashid,$result,600);
6244: }
6245: my ($tmp)=keys(%$result);
6246: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
6247: return $result;
6248: }
6249: #error 2 occurs when the .db doesn't exist
6250: if ($tmp!~/error: 2 /) {
6251: &logthis("<font color=\"blue\">WARNING:".
6252: " Trying to get resource data for ".
6253: $uname." at ".$udom.": ".
6254: $tmp."</font>");
6255: } elsif ($tmp=~/error: 2 /) {
6256: #&EXT_cache_set($udom,$uname);
6257: &do_cache_new('userres',$hashid,undef,600);
6258: undef($tmp); # not really an error so don't send it back
6259: }
6260: return $tmp;
6261: }
6262: #----------------------------------------------- resdata - return resource data
6263: # Purpose:
6264: # Return resource data for either users or for a course.
6265: # Parameters:
6266: # $name - Course/user name.
6267: # $domain - Name of the domain the user/course is registered on.
6268: # $type - Type of thing $name is (must be 'course' or 'user'
6269: # @which - Array of names of resources desired.
6270: # Returns:
6271: # The value of the first reasource in @which that is found in the
6272: # resource hash.
6273: # Exceptional Conditions:
6274: # If the $type passed in is not valid (not the string 'course' or
6275: # 'user', an undefined reference is returned.
6276: # If none of the resources are found, an undef is returned
6277: sub resdata {
6278: my ($name,$domain,$type,@which)=@_;
6279: my $result;
6280: if ($type eq 'course') {
6281: $result=&get_courseresdata($name,$domain);
6282: } elsif ($type eq 'user') {
6283: $result=&get_userresdata($name,$domain);
6284: }
6285: if (!ref($result)) { return $result; }
6286: foreach my $item (@which) {
6287: if (defined($result->{$item})) {
6288: return $result->{$item};
6289: }
6290: }
6291: return undef;
6292: }
6293:
6294: #
6295: # EXT resource caching routines
6296: #
6297:
6298: sub clear_EXT_cache_status {
6299: &delenv('cache.EXT.');
6300: }
6301:
6302: sub EXT_cache_status {
6303: my ($target_domain,$target_user) = @_;
6304: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
6305: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
6306: # We know already the user has no data
6307: return 1;
6308: } else {
6309: return 0;
6310: }
6311: }
6312:
6313: sub EXT_cache_set {
6314: my ($target_domain,$target_user) = @_;
6315: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
6316: #&appenv($cachename => time);
6317: }
6318:
6319: # --------------------------------------------------------- Value of a Variable
6320: sub EXT {
6321:
6322: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
6323: unless ($varname) { return ''; }
6324: #get real user name/domain, courseid and symb
6325: my $courseid;
6326: my $publicuser;
6327: if ($symbparm) {
6328: $symbparm=&get_symb_from_alias($symbparm);
6329: }
6330: if (!($uname && $udom)) {
6331: (my $cursymb,$courseid,$udom,$uname,$publicuser)= &whichuser($symbparm);
6332: if (!$symbparm) { $symbparm=$cursymb; }
6333: } else {
6334: $courseid=$env{'request.course.id'};
6335: }
6336: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
6337: my $rest;
6338: if (defined($therest[0])) {
6339: $rest=join('.',@therest);
6340: } else {
6341: $rest='';
6342: }
6343:
6344: my $qualifierrest=$qualifier;
6345: if ($rest) { $qualifierrest.='.'.$rest; }
6346: my $spacequalifierrest=$space;
6347: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
6348: if ($realm eq 'user') {
6349: # --------------------------------------------------------------- user.resource
6350: if ($space eq 'resource') {
6351: if ( (defined($Apache::lonhomework::parsing_a_problem)
6352: || defined($Apache::lonhomework::parsing_a_task))
6353: &&
6354: ($symbparm eq &symbread()) ) {
6355: # if we are in the middle of processing the resource the
6356: # get the value we are planning on committing
6357: if (defined($Apache::lonhomework::results{$qualifierrest})) {
6358: return $Apache::lonhomework::results{$qualifierrest};
6359: } else {
6360: return $Apache::lonhomework::history{$qualifierrest};
6361: }
6362: } else {
6363: my %restored;
6364: if ($publicuser || $env{'request.state'} eq 'construct') {
6365: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
6366: } else {
6367: %restored=&restore($symbparm,$courseid,$udom,$uname);
6368: }
6369: return $restored{$qualifierrest};
6370: }
6371: # ----------------------------------------------------------------- user.access
6372: } elsif ($space eq 'access') {
6373: # FIXME - not supporting calls for a specific user
6374: return &allowed($qualifier,$rest);
6375: # ------------------------------------------ user.preferences, user.environment
6376: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
6377: if (($uname eq $env{'user.name'}) &&
6378: ($udom eq $env{'user.domain'})) {
6379: return $env{join('.',('environment',$qualifierrest))};
6380: } else {
6381: my %returnhash;
6382: if (!$publicuser) {
6383: %returnhash=&userenvironment($udom,$uname,
6384: $qualifierrest);
6385: }
6386: return $returnhash{$qualifierrest};
6387: }
6388: # ----------------------------------------------------------------- user.course
6389: } elsif ($space eq 'course') {
6390: # FIXME - not supporting calls for a specific user
6391: return $env{join('.',('request.course',$qualifier))};
6392: # ------------------------------------------------------------------- user.role
6393: } elsif ($space eq 'role') {
6394: # FIXME - not supporting calls for a specific user
6395: my ($role,$where)=split(/\./,$env{'request.role'});
6396: if ($qualifier eq 'value') {
6397: return $role;
6398: } elsif ($qualifier eq 'extent') {
6399: return $where;
6400: }
6401: # ----------------------------------------------------------------- user.domain
6402: } elsif ($space eq 'domain') {
6403: return $udom;
6404: # ------------------------------------------------------------------- user.name
6405: } elsif ($space eq 'name') {
6406: return $uname;
6407: # ---------------------------------------------------- Any other user namespace
6408: } else {
6409: my %reply;
6410: if (!$publicuser) {
6411: %reply=&get($space,[$qualifierrest],$udom,$uname);
6412: }
6413: return $reply{$qualifierrest};
6414: }
6415: } elsif ($realm eq 'query') {
6416: # ---------------------------------------------- pull stuff out of query string
6417: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
6418: [$spacequalifierrest]);
6419: return $env{'form.'.$spacequalifierrest};
6420: } elsif ($realm eq 'request') {
6421: # ------------------------------------------------------------- request.browser
6422: if ($space eq 'browser') {
6423: if ($qualifier eq 'textremote') {
6424: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
6425: return 1;
6426: } else {
6427: return 0;
6428: }
6429: } else {
6430: return $env{'browser.'.$qualifier};
6431: }
6432: # ------------------------------------------------------------ request.filename
6433: } else {
6434: return $env{'request.'.$spacequalifierrest};
6435: }
6436: } elsif ($realm eq 'course') {
6437: # ---------------------------------------------------------- course.description
6438: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
6439: } elsif ($realm eq 'resource') {
6440:
6441: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
6442: if (!$symbparm) { $symbparm=&symbread(); }
6443: }
6444:
6445: if ($space eq 'title') {
6446: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
6447: return &gettitle($symbparm);
6448: }
6449:
6450: if ($space eq 'map') {
6451: my ($map) = &decode_symb($symbparm);
6452: return &symbread($map);
6453: }
6454: if ($space eq 'filename') {
6455: if ($symbparm) {
6456: return &clutter((&decode_symb($symbparm))[2]);
6457: }
6458: return &hreflocation('',$env{'request.filename'});
6459: }
6460:
6461: my ($section, $group, @groups);
6462: my ($courselevelm,$courselevel);
6463: if ($symbparm && defined($courseid) &&
6464: $courseid eq $env{'request.course.id'}) {
6465:
6466: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
6467:
6468: # ----------------------------------------------------- Cascading lookup scheme
6469: my $symbp=$symbparm;
6470: my $mapp=&deversion((&decode_symb($symbp))[0]);
6471:
6472: my $symbparm=$symbp.'.'.$spacequalifierrest;
6473: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
6474:
6475: if (($env{'user.name'} eq $uname) &&
6476: ($env{'user.domain'} eq $udom)) {
6477: $section=$env{'request.course.sec'};
6478: @groups = split(/:/,$env{'request.course.groups'});
6479: @groups=&sort_course_groups($courseid,@groups);
6480: } else {
6481: if (! defined($usection)) {
6482: $section=&getsection($udom,$uname,$courseid);
6483: } else {
6484: $section = $usection;
6485: }
6486: @groups = &get_users_groups($udom,$uname,$courseid);
6487: }
6488:
6489: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
6490: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
6491: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
6492:
6493: $courselevel=$courseid.'.'.$spacequalifierrest;
6494: my $courselevelr=$courseid.'.'.$symbparm;
6495: $courselevelm=$courseid.'.'.$mapparm;
6496:
6497: # ----------------------------------------------------------- first, check user
6498:
6499: my $userreply=&resdata($uname,$udom,'user',
6500: ($courselevelr,$courselevelm,
6501: $courselevel));
6502: if (defined($userreply)) { return $userreply; }
6503:
6504: # ------------------------------------------------ second, check some of course
6505: my $coursereply;
6506: if (@groups > 0) {
6507: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
6508: $mapparm,$spacequalifierrest);
6509: if (defined($coursereply)) { return $coursereply; }
6510: }
6511:
6512: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6513: $env{'course.'.$courseid.'.domain'},
6514: 'course',
6515: ($seclevelr,$seclevelm,$seclevel,
6516: $courselevelr));
6517: if (defined($coursereply)) { return $coursereply; }
6518:
6519: # ------------------------------------------------------ third, check map parms
6520: my %parmhash=();
6521: my $thisparm='';
6522: if (tie(%parmhash,'GDBM_File',
6523: $env{'request.course.fn'}.'_parms.db',
6524: &GDBM_READER(),0640)) {
6525: $thisparm=$parmhash{$symbparm};
6526: untie(%parmhash);
6527: }
6528: if ($thisparm) { return $thisparm; }
6529: }
6530: # ------------------------------------------ fourth, look in resource metadata
6531:
6532: $spacequalifierrest=~s/\./\_/;
6533: my $filename;
6534: if (!$symbparm) { $symbparm=&symbread(); }
6535: if ($symbparm) {
6536: $filename=(&decode_symb($symbparm))[2];
6537: } else {
6538: $filename=$env{'request.filename'};
6539: }
6540: my $metadata=&metadata($filename,$spacequalifierrest);
6541: if (defined($metadata)) { return $metadata; }
6542: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
6543: if (defined($metadata)) { return $metadata; }
6544:
6545: # ---------------------------------------------- fourth, look in rest pf course
6546: if ($symbparm && defined($courseid) &&
6547: $courseid eq $env{'request.course.id'}) {
6548: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
6549: $env{'course.'.$courseid.'.domain'},
6550: 'course',
6551: ($courselevelm,$courselevel));
6552: if (defined($coursereply)) { return $coursereply; }
6553: }
6554: # ------------------------------------------------------------------ Cascade up
6555: unless ($space eq '0') {
6556: my @parts=split(/_/,$space);
6557: my $id=pop(@parts);
6558: my $part=join('_',@parts);
6559: if ($part eq '') { $part='0'; }
6560: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
6561: $symbparm,$udom,$uname,$section,1);
6562: if (defined($partgeneral)) { return $partgeneral; }
6563: }
6564: if ($recurse) { return undef; }
6565: my $pack_def=&packages_tab_default($filename,$varname);
6566: if (defined($pack_def)) { return $pack_def; }
6567:
6568: # ---------------------------------------------------- Any other user namespace
6569: } elsif ($realm eq 'environment') {
6570: # ----------------------------------------------------------------- environment
6571: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
6572: return $env{'environment.'.$spacequalifierrest};
6573: } else {
6574: if ($uname eq 'anonymous' && $udom eq '') {
6575: return '';
6576: }
6577: my %returnhash=&userenvironment($udom,$uname,
6578: $spacequalifierrest);
6579: return $returnhash{$spacequalifierrest};
6580: }
6581: } elsif ($realm eq 'system') {
6582: # ----------------------------------------------------------------- system.time
6583: if ($space eq 'time') {
6584: return time;
6585: }
6586: } elsif ($realm eq 'server') {
6587: # ----------------------------------------------------------------- system.time
6588: if ($space eq 'name') {
6589: return $ENV{'SERVER_NAME'};
6590: }
6591: }
6592: return '';
6593: }
6594:
6595: sub check_group_parms {
6596: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
6597: my @groupitems = ();
6598: my $resultitem;
6599: my @levels = ($symbparm,$mapparm,$what);
6600: foreach my $group (@{$groups}) {
6601: foreach my $level (@levels) {
6602: my $item = $courseid.'.['.$group.'].'.$level;
6603: push(@groupitems,$item);
6604: }
6605: }
6606: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
6607: $env{'course.'.$courseid.'.domain'},
6608: 'course',@groupitems);
6609: return $coursereply;
6610: }
6611:
6612: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
6613: my ($courseid,@groups) = @_;
6614: @groups = sort(@groups);
6615: return @groups;
6616: }
6617:
6618: sub packages_tab_default {
6619: my ($uri,$varname)=@_;
6620: my (undef,$part,$name)=split(/\./,$varname);
6621:
6622: my (@extension,@specifics,$do_default);
6623: foreach my $package (split(/,/,&metadata($uri,'packages'))) {
6624: my ($pack_type,$pack_part)=split(/_/,$package,2);
6625: if ($pack_type eq 'default') {
6626: $do_default=1;
6627: } elsif ($pack_type eq 'extension') {
6628: push(@extension,[$package,$pack_type,$pack_part]);
6629: } elsif ($pack_part eq $part || $pack_type eq 'part') {
6630: # only look at packages defaults for packages that this id is
6631: push(@specifics,[$package,$pack_type,$pack_part]);
6632: }
6633: }
6634: # first look for a package that matches the requested part id
6635: foreach my $package (@specifics) {
6636: my (undef,$pack_type,$pack_part)=@{$package};
6637: next if ($pack_part ne $part);
6638: if (defined($packagetab{"$pack_type&$name&default"})) {
6639: return $packagetab{"$pack_type&$name&default"};
6640: }
6641: }
6642: # look for any possible matching non extension_ package
6643: foreach my $package (@specifics) {
6644: my (undef,$pack_type,$pack_part)=@{$package};
6645: if (defined($packagetab{"$pack_type&$name&default"})) {
6646: return $packagetab{"$pack_type&$name&default"};
6647: }
6648: if ($pack_type eq 'part') { $pack_part='0'; }
6649: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
6650: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
6651: }
6652: }
6653: # look for any posible extension_ match
6654: foreach my $package (@extension) {
6655: my ($package,$pack_type)=@{$package};
6656: if (defined($packagetab{"$pack_type&$name&default"})) {
6657: return $packagetab{"$pack_type&$name&default"};
6658: }
6659: if (defined($packagetab{$package."&$name&default"})) {
6660: return $packagetab{$package."&$name&default"};
6661: }
6662: }
6663: # look for a global default setting
6664: if ($do_default && defined($packagetab{"default&$name&default"})) {
6665: return $packagetab{"default&$name&default"};
6666: }
6667: return undef;
6668: }
6669:
6670: sub add_prefix_and_part {
6671: my ($prefix,$part)=@_;
6672: my $keyroot;
6673: if (defined($prefix) && $prefix !~ /^__/) {
6674: # prefix that has a part already
6675: $keyroot=$prefix;
6676: } elsif (defined($prefix)) {
6677: # prefix that is missing a part
6678: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
6679: } else {
6680: # no prefix at all
6681: if (defined($part)) { $keyroot='_'.$part; }
6682: }
6683: return $keyroot;
6684: }
6685:
6686: # ---------------------------------------------------------------- Get metadata
6687:
6688: my %metaentry;
6689: sub metadata {
6690: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
6691: $uri=&declutter($uri);
6692: # if it is a non metadata possible uri return quickly
6693: if (($uri eq '') ||
6694: (($uri =~ m|^/*adm/|) &&
6695: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
6696: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
6697: ($uri =~ m|home/$match_username/public_html/|)) {
6698: return undef;
6699: }
6700: my $filename=$uri;
6701: $uri=~s/\.meta$//;
6702: #
6703: # Is the metadata already cached?
6704: # Look at timestamp of caching
6705: # Everything is cached by the main uri, libraries are never directly cached
6706: #
6707: if (!defined($liburi)) {
6708: my ($result,$cached)=&is_cached_new('meta',$uri);
6709: if (defined($cached)) { return $result->{':'.$what}; }
6710: }
6711: {
6712: #
6713: # Is this a recursive call for a library?
6714: #
6715: # if (! exists($metacache{$uri})) {
6716: # $metacache{$uri}={};
6717: # }
6718: if ($liburi) {
6719: $liburi=&declutter($liburi);
6720: $filename=$liburi;
6721: } else {
6722: &devalidate_cache_new('meta',$uri);
6723: undef(%metaentry);
6724: }
6725: my %metathesekeys=();
6726: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
6727: my $metastring;
6728: if ($uri !~ m -^(editupload)/-) {
6729: my $file=&filelocation('',&clutter($filename));
6730: #push(@{$metaentry{$uri.'.file'}},$file);
6731: $metastring=&getfile($file);
6732: }
6733: my $parser=HTML::LCParser->new(\$metastring);
6734: my $token;
6735: undef %metathesekeys;
6736: while ($token=$parser->get_token) {
6737: if ($token->[0] eq 'S') {
6738: if (defined($token->[2]->{'package'})) {
6739: #
6740: # This is a package - get package info
6741: #
6742: my $package=$token->[2]->{'package'};
6743: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6744: if (defined($token->[2]->{'id'})) {
6745: $keyroot.='_'.$token->[2]->{'id'};
6746: }
6747: if ($metaentry{':packages'}) {
6748: $metaentry{':packages'}.=','.$package.$keyroot;
6749: } else {
6750: $metaentry{':packages'}=$package.$keyroot;
6751: }
6752: foreach my $pack_entry (keys(%packagetab)) {
6753: my $part=$keyroot;
6754: $part=~s/^\_//;
6755: if ($pack_entry=~/^\Q$package\E\&/ ||
6756: $pack_entry=~/^\Q$package\E_0\&/) {
6757: my ($pack,$name,$subp)=split(/\&/,$pack_entry);
6758: # ignore package.tab specified default values
6759: # here &package_tab_default() will fetch those
6760: if ($subp eq 'default') { next; }
6761: my $value=$packagetab{$pack_entry};
6762: my $unikey;
6763: if ($pack =~ /_0$/) {
6764: $unikey='parameter_0_'.$name;
6765: $part=0;
6766: } else {
6767: $unikey='parameter'.$keyroot.'_'.$name;
6768: }
6769: if ($subp eq 'display') {
6770: $value.=' [Part: '.$part.']';
6771: }
6772: $metaentry{':'.$unikey.'.part'}=$part;
6773: $metathesekeys{$unikey}=1;
6774: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6775: $metaentry{':'.$unikey.'.'.$subp}=$value;
6776: }
6777: if (defined($metaentry{':'.$unikey.'.default'})) {
6778: $metaentry{':'.$unikey}=
6779: $metaentry{':'.$unikey.'.default'};
6780: }
6781: }
6782: }
6783: } else {
6784: #
6785: # This is not a package - some other kind of start tag
6786: #
6787: my $entry=$token->[1];
6788: my $unikey;
6789: if ($entry eq 'import') {
6790: $unikey='';
6791: } else {
6792: $unikey=$entry;
6793: }
6794: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
6795:
6796: if (defined($token->[2]->{'id'})) {
6797: $unikey.='_'.$token->[2]->{'id'};
6798: }
6799:
6800: if ($entry eq 'import') {
6801: #
6802: # Importing a library here
6803: #
6804: if ($depthcount<20) {
6805: my $location=$parser->get_text('/import');
6806: my $dir=$filename;
6807: $dir=~s|[^/]*$||;
6808: $location=&filelocation($dir,$location);
6809: my $metadata =
6810: &metadata($uri,'keys', $location,$unikey,
6811: $depthcount+1);
6812: foreach my $meta (split(',',$metadata)) {
6813: $metaentry{':'.$meta}=$metaentry{':'.$meta};
6814: $metathesekeys{$meta}=1;
6815: }
6816: }
6817: } else {
6818:
6819: if (defined($token->[2]->{'name'})) {
6820: $unikey.='_'.$token->[2]->{'name'};
6821: }
6822: $metathesekeys{$unikey}=1;
6823: foreach my $param (@{$token->[3]}) {
6824: $metaentry{':'.$unikey.'.'.$param} =
6825: $token->[2]->{$param};
6826: }
6827: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
6828: my $default=$metaentry{':'.$unikey.'.default'};
6829: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
6830: # only ws inside the tag, and not in default, so use default
6831: # as value
6832: $metaentry{':'.$unikey}=$default;
6833: } elsif ( $internaltext =~ /\S/ ) {
6834: # something interesting inside the tag
6835: $metaentry{':'.$unikey}=$internaltext;
6836: } else {
6837: # no interesting values, don't set a default
6838: }
6839: # end of not-a-package not-a-library import
6840: }
6841: # end of not-a-package start tag
6842: }
6843: # the next is the end of "start tag"
6844: }
6845: }
6846: my ($extension) = ($uri =~ /\.(\w+)$/);
6847: $extension = lc($extension);
6848: if ($extension eq 'htm') { $extension='html'; }
6849:
6850: foreach my $key (keys(%packagetab)) {
6851: #no specific packages #how's our extension
6852: if ($key!~/^extension_\Q$extension\E&/) { next; }
6853: &metadata_create_package_def($uri,$key,'extension_'.$extension,
6854: \%metathesekeys);
6855: }
6856:
6857: if (!exists($metaentry{':packages'})
6858: || $packagetab{"import_defaults&extension_$extension"}) {
6859: foreach my $key (keys(%packagetab)) {
6860: #no specific packages well let's get default then
6861: if ($key!~/^default&/) { next; }
6862: &metadata_create_package_def($uri,$key,'default',
6863: \%metathesekeys);
6864: }
6865: }
6866: # are there custom rights to evaluate
6867: if ($metaentry{':copyright'} eq 'custom') {
6868:
6869: #
6870: # Importing a rights file here
6871: #
6872: unless ($depthcount) {
6873: my $location=$metaentry{':customdistributionfile'};
6874: my $dir=$filename;
6875: $dir=~s|[^/]*$||;
6876: $location=&filelocation($dir,$location);
6877: my $rights_metadata =
6878: &metadata($uri,'keys',$location,'_rights',
6879: $depthcount+1);
6880: foreach my $rights (split(',',$rights_metadata)) {
6881: #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
6882: $metathesekeys{$rights}=1;
6883: }
6884: }
6885: }
6886: # uniqifiy package listing
6887: my %seen;
6888: my @uniq_packages =
6889: grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
6890: $metaentry{':packages'} = join(',',@uniq_packages);
6891:
6892: $metaentry{':keys'} = join(',',keys(%metathesekeys));
6893: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
6894: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
6895: &do_cache_new('meta',$uri,\%metaentry,60*60);
6896: # this is the end of "was not already recently cached
6897: }
6898: return $metaentry{':'.$what};
6899: }
6900:
6901: sub metadata_create_package_def {
6902: my ($uri,$key,$package,$metathesekeys)=@_;
6903: my ($pack,$name,$subp)=split(/\&/,$key);
6904: if ($subp eq 'default') { next; }
6905:
6906: if (defined($metaentry{':packages'})) {
6907: $metaentry{':packages'}.=','.$package;
6908: } else {
6909: $metaentry{':packages'}=$package;
6910: }
6911: my $value=$packagetab{$key};
6912: my $unikey;
6913: $unikey='parameter_0_'.$name;
6914: $metaentry{':'.$unikey.'.part'}=0;
6915: $$metathesekeys{$unikey}=1;
6916: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6917: $metaentry{':'.$unikey.'.'.$subp}=$value;
6918: }
6919: if (defined($metaentry{':'.$unikey.'.default'})) {
6920: $metaentry{':'.$unikey}=
6921: $metaentry{':'.$unikey.'.default'};
6922: }
6923: }
6924:
6925: sub metadata_generate_part0 {
6926: my ($metadata,$metacache,$uri) = @_;
6927: my %allnames;
6928: foreach my $metakey (keys(%$metadata)) {
6929: if ($metakey=~/^parameter\_(.*)/) {
6930: my $part=$$metacache{':'.$metakey.'.part'};
6931: my $name=$$metacache{':'.$metakey.'.name'};
6932: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
6933: $allnames{$name}=$part;
6934: }
6935: }
6936: }
6937: foreach my $name (keys(%allnames)) {
6938: $$metadata{"parameter_0_$name"}=1;
6939: my $key=":parameter_0_$name";
6940: $$metacache{"$key.part"}='0';
6941: $$metacache{"$key.name"}=$name;
6942: $$metacache{"$key.type"}=$$metacache{':parameter_'.
6943: $allnames{$name}.'_'.$name.
6944: '.type'};
6945: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
6946: '.display'};
6947: my $expr='[Part: '.$allnames{$name}.']';
6948: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
6949: $$metacache{"$key.display"}=$olddis;
6950: }
6951: }
6952:
6953: # ------------------------------------------------------ Devalidate title cache
6954:
6955: sub devalidate_title_cache {
6956: my ($url)=@_;
6957: if (!$env{'request.course.id'}) { return; }
6958: my $symb=&symbread($url);
6959: if (!$symb) { return; }
6960: my $key=$env{'request.course.id'}."\0".$symb;
6961: &devalidate_cache_new('title',$key);
6962: }
6963:
6964: # ------------------------------------------------- Get the title of a resource
6965:
6966: sub gettitle {
6967: my $urlsymb=shift;
6968: my $symb=&symbread($urlsymb);
6969: if ($symb) {
6970: my $key=$env{'request.course.id'}."\0".$symb;
6971: my ($result,$cached)=&is_cached_new('title',$key);
6972: if (defined($cached)) {
6973: return $result;
6974: }
6975: my ($map,$resid,$url)=&decode_symb($symb);
6976: my $title='';
6977: if (!$map && $resid == 0 && $url =~/default\.sequence$/) {
6978: $title = $env{'course.'.$env{'request.course.id'}.'.description'};
6979: } else {
6980: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6981: &GDBM_READER(),0640)) {
6982: my $mapid=$bighash{'map_pc_'.&clutter($map)};
6983: $title=$bighash{'title_'.$mapid.'.'.$resid};
6984: untie(%bighash);
6985: }
6986: }
6987: $title=~s/\&colon\;/\:/gs;
6988: if ($title) {
6989: return &do_cache_new('title',$key,$title,600);
6990: }
6991: $urlsymb=$url;
6992: }
6993: my $title=&metadata($urlsymb,'title');
6994: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
6995: return $title;
6996: }
6997:
6998: sub get_slot {
6999: my ($which,$cnum,$cdom)=@_;
7000: if (!$cnum || !$cdom) {
7001: (undef,my $courseid)=&whichuser();
7002: $cdom=$env{'course.'.$courseid.'.domain'};
7003: $cnum=$env{'course.'.$courseid.'.num'};
7004: }
7005: my $key=join("\0",'slots',$cdom,$cnum,$which);
7006: my %slotinfo;
7007: if (exists($remembered{$key})) {
7008: $slotinfo{$which} = $remembered{$key};
7009: } else {
7010: %slotinfo=&get('slots',[$which],$cdom,$cnum);
7011: &Apache::lonhomework::showhash(%slotinfo);
7012: my ($tmp)=keys(%slotinfo);
7013: if ($tmp=~/^error:/) { return (); }
7014: $remembered{$key} = $slotinfo{$which};
7015: }
7016: if (ref($slotinfo{$which}) eq 'HASH') {
7017: return %{$slotinfo{$which}};
7018: }
7019: return $slotinfo{$which};
7020: }
7021: # ------------------------------------------------- Update symbolic store links
7022:
7023: sub symblist {
7024: my ($mapname,%newhash)=@_;
7025: $mapname=&deversion(&declutter($mapname));
7026: my %hash;
7027: if (($env{'request.course.fn'}) && (%newhash)) {
7028: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
7029: &GDBM_WRCREAT(),0640)) {
7030: foreach my $url (keys %newhash) {
7031: next if ($url eq 'last_known'
7032: && $env{'form.no_update_last_known'});
7033: $hash{declutter($url)}=&encode_symb($mapname,
7034: $newhash{$url}->[1],
7035: $newhash{$url}->[0]);
7036: }
7037: if (untie(%hash)) {
7038: return 'ok';
7039: }
7040: }
7041: }
7042: return 'error';
7043: }
7044:
7045: # --------------------------------------------------------------- Verify a symb
7046:
7047: sub symbverify {
7048: my ($symb,$thisurl)=@_;
7049: my $thisfn=$thisurl;
7050: $thisfn=&declutter($thisfn);
7051: # direct jump to resource in page or to a sequence - will construct own symbs
7052: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
7053: # check URL part
7054: my ($map,$resid,$url)=&decode_symb($symb);
7055:
7056: unless ($url eq $thisfn) { return 0; }
7057:
7058: $symb=&symbclean($symb);
7059: $thisurl=&deversion($thisurl);
7060: $thisfn=&deversion($thisfn);
7061:
7062: my %bighash;
7063: my $okay=0;
7064:
7065: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
7066: &GDBM_READER(),0640)) {
7067: my $ids=$bighash{'ids_'.&clutter($thisurl)};
7068: unless ($ids) {
7069: $ids=$bighash{'ids_/'.$thisurl};
7070: }
7071: if ($ids) {
7072: # ------------------------------------------------------------------- Has ID(s)
7073: foreach my $id (split(/\,/,$ids)) {
7074: my ($mapid,$resid)=split(/\./,$id);
7075: if (
7076: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
7077: eq $symb) {
7078: if (($env{'request.role.adv'}) ||
7079: $bighash{'encrypted_'.$id} eq $env{'request.enc'}) {
7080: $okay=1;
7081: }
7082: }
7083: }
7084: }
7085: untie(%bighash);
7086: }
7087: return $okay;
7088: }
7089:
7090: # --------------------------------------------------------------- Clean-up symb
7091:
7092: sub symbclean {
7093: my $symb=shift;
7094: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
7095: # remove version from map
7096: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
7097:
7098: # remove version from URL
7099: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
7100:
7101: # remove wrapper
7102:
7103: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
7104: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
7105: return $symb;
7106: }
7107:
7108: # ---------------------------------------------- Split symb to find map and url
7109:
7110: sub encode_symb {
7111: my ($map,$resid,$url)=@_;
7112: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
7113: }
7114:
7115: sub decode_symb {
7116: my $symb=shift;
7117: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
7118: my ($map,$resid,$url)=split(/___/,$symb);
7119: return (&fixversion($map),$resid,&fixversion($url));
7120: }
7121:
7122: sub fixversion {
7123: my $fn=shift;
7124: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
7125: my %bighash;
7126: my $uri=&clutter($fn);
7127: my $key=$env{'request.course.id'}.'_'.$uri;
7128: # is this cached?
7129: my ($result,$cached)=&is_cached_new('courseresversion',$key);
7130: if (defined($cached)) { return $result; }
7131: # unfortunately not cached, or expired
7132: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
7133: &GDBM_READER(),0640)) {
7134: if ($bighash{'version_'.$uri}) {
7135: my $version=$bighash{'version_'.$uri};
7136: unless (($version eq 'mostrecent') ||
7137: ($version==&getversion($uri))) {
7138: $uri=~s/\.(\w+)$/\.$version\.$1/;
7139: }
7140: }
7141: untie %bighash;
7142: }
7143: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
7144: }
7145:
7146: sub deversion {
7147: my $url=shift;
7148: $url=~s/\.\d+\.(\w+)$/\.$1/;
7149: return $url;
7150: }
7151:
7152: # ------------------------------------------------------ Return symb list entry
7153:
7154: sub symbread {
7155: my ($thisfn,$donotrecurse)=@_;
7156: my $cache_str='request.symbread.cached.'.$thisfn;
7157: if (defined($env{$cache_str})) { return $env{$cache_str}; }
7158: # no filename provided? try from environment
7159: unless ($thisfn) {
7160: if ($env{'request.symb'}) {
7161: return $env{$cache_str}=&symbclean($env{'request.symb'});
7162: }
7163: $thisfn=$env{'request.filename'};
7164: }
7165: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7166: # is that filename actually a symb? Verify, clean, and return
7167: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
7168: if (&symbverify($thisfn,$1)) {
7169: return $env{$cache_str}=&symbclean($thisfn);
7170: }
7171: }
7172: $thisfn=declutter($thisfn);
7173: my %hash;
7174: my %bighash;
7175: my $syval='';
7176: if (($env{'request.course.fn'}) && ($thisfn)) {
7177: my $targetfn = $thisfn;
7178: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
7179: $targetfn = 'adm/wrapper/'.$thisfn;
7180: }
7181: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
7182: $targetfn=$1;
7183: }
7184: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
7185: &GDBM_READER(),0640)) {
7186: $syval=$hash{$targetfn};
7187: untie(%hash);
7188: }
7189: # ---------------------------------------------------------- There was an entry
7190: if ($syval) {
7191: #unless ($syval=~/\_\d+$/) {
7192: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
7193: #&appenv('request.ambiguous' => $thisfn);
7194: #return $env{$cache_str}='';
7195: #}
7196: #$syval.=$1;
7197: #}
7198: } else {
7199: # ------------------------------------------------------- Was not in symb table
7200: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
7201: &GDBM_READER(),0640)) {
7202: # ---------------------------------------------- Get ID(s) for current resource
7203: my $ids=$bighash{'ids_'.&clutter($thisfn)};
7204: unless ($ids) {
7205: $ids=$bighash{'ids_/'.$thisfn};
7206: }
7207: unless ($ids) {
7208: # alias?
7209: $ids=$bighash{'mapalias_'.$thisfn};
7210: }
7211: if ($ids) {
7212: # ------------------------------------------------------------------- Has ID(s)
7213: my @possibilities=split(/\,/,$ids);
7214: if ($#possibilities==0) {
7215: # ----------------------------------------------- There is only one possibility
7216: my ($mapid,$resid)=split(/\./,$ids);
7217: $syval=&encode_symb($bighash{'map_id_'.$mapid},
7218: $resid,$thisfn);
7219: } elsif (!$donotrecurse) {
7220: # ------------------------------------------ There is more than one possibility
7221: my $realpossible=0;
7222: foreach my $id (@possibilities) {
7223: my $file=$bighash{'src_'.$id};
7224: if (&allowed('bre',$file)) {
7225: my ($mapid,$resid)=split(/\./,$id);
7226: if ($bighash{'map_type_'.$mapid} ne 'page') {
7227: $realpossible++;
7228: $syval=&encode_symb($bighash{'map_id_'.$mapid},
7229: $resid,$thisfn);
7230: }
7231: }
7232: }
7233: if ($realpossible!=1) { $syval=''; }
7234: } else {
7235: $syval='';
7236: }
7237: }
7238: untie(%bighash)
7239: }
7240: }
7241: if ($syval) {
7242: return $env{$cache_str}=$syval;
7243: }
7244: }
7245: &appenv('request.ambiguous' => $thisfn);
7246: return $env{$cache_str}='';
7247: }
7248:
7249: # ---------------------------------------------------------- Return random seed
7250:
7251: sub numval {
7252: my $txt=shift;
7253: $txt=~tr/A-J/0-9/;
7254: $txt=~tr/a-j/0-9/;
7255: $txt=~tr/K-T/0-9/;
7256: $txt=~tr/k-t/0-9/;
7257: $txt=~tr/U-Z/0-5/;
7258: $txt=~tr/u-z/0-5/;
7259: $txt=~s/\D//g;
7260: if ($_64bit) { if ($txt > 2**32) { return -1; } }
7261: return int($txt);
7262: }
7263:
7264: sub numval2 {
7265: my $txt=shift;
7266: $txt=~tr/A-J/0-9/;
7267: $txt=~tr/a-j/0-9/;
7268: $txt=~tr/K-T/0-9/;
7269: $txt=~tr/k-t/0-9/;
7270: $txt=~tr/U-Z/0-5/;
7271: $txt=~tr/u-z/0-5/;
7272: $txt=~s/\D//g;
7273: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
7274: my $total;
7275: foreach my $val (@txts) { $total+=$val; }
7276: if ($_64bit) { if ($total > 2**32) { return -1; } }
7277: return int($total);
7278: }
7279:
7280: sub numval3 {
7281: use integer;
7282: my $txt=shift;
7283: $txt=~tr/A-J/0-9/;
7284: $txt=~tr/a-j/0-9/;
7285: $txt=~tr/K-T/0-9/;
7286: $txt=~tr/k-t/0-9/;
7287: $txt=~tr/U-Z/0-5/;
7288: $txt=~tr/u-z/0-5/;
7289: $txt=~s/\D//g;
7290: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
7291: my $total;
7292: foreach my $val (@txts) { $total+=$val; }
7293: if ($_64bit) { $total=(($total<<32)>>32); }
7294: return $total;
7295: }
7296:
7297: sub digest {
7298: my ($data)=@_;
7299: my $digest=&Digest::MD5::md5($data);
7300: my ($a,$b,$c,$d)=unpack("iiii",$digest);
7301: my ($e,$f);
7302: {
7303: use integer;
7304: $e=($a+$b);
7305: $f=($c+$d);
7306: if ($_64bit) {
7307: $e=(($e<<32)>>32);
7308: $f=(($f<<32)>>32);
7309: }
7310: }
7311: if (wantarray) {
7312: return ($e,$f);
7313: } else {
7314: my $g;
7315: {
7316: use integer;
7317: $g=($e+$f);
7318: if ($_64bit) {
7319: $g=(($g<<32)>>32);
7320: }
7321: }
7322: return $g;
7323: }
7324: }
7325:
7326: sub latest_rnd_algorithm_id {
7327: return '64bit5';
7328: }
7329:
7330: sub get_rand_alg {
7331: my ($courseid)=@_;
7332: if (!$courseid) { $courseid=(&whichuser())[1]; }
7333: if ($courseid) {
7334: return $env{"course.$courseid.rndseed"};
7335: }
7336: return &latest_rnd_algorithm_id();
7337: }
7338:
7339: sub validCODE {
7340: my ($CODE)=@_;
7341: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
7342: return 0;
7343: }
7344:
7345: sub getCODE {
7346: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
7347: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
7348: defined($Apache::lonhomework::parsing_a_task) ) &&
7349: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
7350: return $Apache::lonhomework::history{'resource.CODE'};
7351: }
7352: return undef;
7353: }
7354:
7355: sub rndseed {
7356: my ($symb,$courseid,$domain,$username)=@_;
7357: my ($wsymb,$wcourseid,$wdomain,$wusername)=&whichuser();
7358: if (!defined($symb)) {
7359: unless ($symb=$wsymb) { return time; }
7360: }
7361: if (!$courseid) { $courseid=$wcourseid; }
7362: if (!$domain) { $domain=$wdomain; }
7363: if (!$username) { $username=$wusername }
7364: my $which=&get_rand_alg();
7365:
7366: if (defined(&getCODE())) {
7367: if ($which eq '64bit5') {
7368: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
7369: } elsif ($which eq '64bit4') {
7370: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
7371: } else {
7372: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
7373: }
7374: } elsif ($which eq '64bit5') {
7375: return &rndseed_64bit5($symb,$courseid,$domain,$username);
7376: } elsif ($which eq '64bit4') {
7377: return &rndseed_64bit4($symb,$courseid,$domain,$username);
7378: } elsif ($which eq '64bit3') {
7379: return &rndseed_64bit3($symb,$courseid,$domain,$username);
7380: } elsif ($which eq '64bit2') {
7381: return &rndseed_64bit2($symb,$courseid,$domain,$username);
7382: } elsif ($which eq '64bit') {
7383: return &rndseed_64bit($symb,$courseid,$domain,$username);
7384: }
7385: return &rndseed_32bit($symb,$courseid,$domain,$username);
7386: }
7387:
7388: sub rndseed_32bit {
7389: my ($symb,$courseid,$domain,$username)=@_;
7390: {
7391: use integer;
7392: my $symbchck=unpack("%32C*",$symb) << 27;
7393: my $symbseed=numval($symb) << 22;
7394: my $namechck=unpack("%32C*",$username) << 17;
7395: my $nameseed=numval($username) << 12;
7396: my $domainseed=unpack("%32C*",$domain) << 7;
7397: my $courseseed=unpack("%32C*",$courseid);
7398: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
7399: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7400: #&logthis("rndseed :$num:$symb");
7401: if ($_64bit) { $num=(($num<<32)>>32); }
7402: return $num;
7403: }
7404: }
7405:
7406: sub rndseed_64bit {
7407: my ($symb,$courseid,$domain,$username)=@_;
7408: {
7409: use integer;
7410: my $symbchck=unpack("%32S*",$symb) << 21;
7411: my $symbseed=numval($symb) << 10;
7412: my $namechck=unpack("%32S*",$username);
7413:
7414: my $nameseed=numval($username) << 21;
7415: my $domainseed=unpack("%32S*",$domain) << 10;
7416: my $courseseed=unpack("%32S*",$courseid);
7417:
7418: my $num1=$symbchck+$symbseed+$namechck;
7419: my $num2=$nameseed+$domainseed+$courseseed;
7420: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7421: #&logthis("rndseed :$num:$symb");
7422: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7423: return "$num1,$num2";
7424: }
7425: }
7426:
7427: sub rndseed_64bit2 {
7428: my ($symb,$courseid,$domain,$username)=@_;
7429: {
7430: use integer;
7431: # strings need to be an even # of cahracters long, it it is odd the
7432: # last characters gets thrown away
7433: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7434: my $symbseed=numval($symb) << 10;
7435: my $namechck=unpack("%32S*",$username.' ');
7436:
7437: my $nameseed=numval($username) << 21;
7438: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7439: my $courseseed=unpack("%32S*",$courseid.' ');
7440:
7441: my $num1=$symbchck+$symbseed+$namechck;
7442: my $num2=$nameseed+$domainseed+$courseseed;
7443: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7444: #&logthis("rndseed :$num:$symb");
7445: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7446: return "$num1,$num2";
7447: }
7448: }
7449:
7450: sub rndseed_64bit3 {
7451: my ($symb,$courseid,$domain,$username)=@_;
7452: {
7453: use integer;
7454: # strings need to be an even # of cahracters long, it it is odd the
7455: # last characters gets thrown away
7456: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7457: my $symbseed=numval2($symb) << 10;
7458: my $namechck=unpack("%32S*",$username.' ');
7459:
7460: my $nameseed=numval2($username) << 21;
7461: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7462: my $courseseed=unpack("%32S*",$courseid.' ');
7463:
7464: my $num1=$symbchck+$symbseed+$namechck;
7465: my $num2=$nameseed+$domainseed+$courseseed;
7466: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7467: #&logthis("rndseed :$num1:$num2:$_64bit");
7468: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7469:
7470: return "$num1:$num2";
7471: }
7472: }
7473:
7474: sub rndseed_64bit4 {
7475: my ($symb,$courseid,$domain,$username)=@_;
7476: {
7477: use integer;
7478: # strings need to be an even # of cahracters long, it it is odd the
7479: # last characters gets thrown away
7480: my $symbchck=unpack("%32S*",$symb.' ') << 21;
7481: my $symbseed=numval3($symb) << 10;
7482: my $namechck=unpack("%32S*",$username.' ');
7483:
7484: my $nameseed=numval3($username) << 21;
7485: my $domainseed=unpack("%32S*",$domain.' ') << 10;
7486: my $courseseed=unpack("%32S*",$courseid.' ');
7487:
7488: my $num1=$symbchck+$symbseed+$namechck;
7489: my $num2=$nameseed+$domainseed+$courseseed;
7490: #&logthis("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
7491: #&logthis("rndseed :$num1:$num2:$_64bit");
7492: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
7493:
7494: return "$num1:$num2";
7495: }
7496: }
7497:
7498: sub rndseed_64bit5 {
7499: my ($symb,$courseid,$domain,$username)=@_;
7500: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
7501: return "$num1:$num2";
7502: }
7503:
7504: sub rndseed_CODE_64bit {
7505: my ($symb,$courseid,$domain,$username)=@_;
7506: {
7507: use integer;
7508: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7509: my $symbseed=numval2($symb);
7510: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7511: my $CODEseed=numval(&getCODE());
7512: my $courseseed=unpack("%32S*",$courseid.' ');
7513: my $num1=$symbseed+$CODEchck;
7514: my $num2=$CODEseed+$courseseed+$symbchck;
7515: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7516: #&logthis("rndseed :$num1:$num2:$symb");
7517: if ($_64bit) { $num1=(($num1<<32)>>32); }
7518: if ($_64bit) { $num2=(($num2<<32)>>32); }
7519: return "$num1:$num2";
7520: }
7521: }
7522:
7523: sub rndseed_CODE_64bit4 {
7524: my ($symb,$courseid,$domain,$username)=@_;
7525: {
7526: use integer;
7527: my $symbchck=unpack("%32S*",$symb.' ') << 16;
7528: my $symbseed=numval3($symb);
7529: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
7530: my $CODEseed=numval3(&getCODE());
7531: my $courseseed=unpack("%32S*",$courseid.' ');
7532: my $num1=$symbseed+$CODEchck;
7533: my $num2=$CODEseed+$courseseed+$symbchck;
7534: #&logthis("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
7535: #&logthis("rndseed :$num1:$num2:$symb");
7536: if ($_64bit) { $num1=(($num1<<32)>>32); }
7537: if ($_64bit) { $num2=(($num2<<32)>>32); }
7538: return "$num1:$num2";
7539: }
7540: }
7541:
7542: sub rndseed_CODE_64bit5 {
7543: my ($symb,$courseid,$domain,$username)=@_;
7544: my $code = &getCODE();
7545: my ($num1,$num2)=&digest("$symb,$courseid,$code");
7546: return "$num1:$num2";
7547: }
7548:
7549: sub setup_random_from_rndseed {
7550: my ($rndseed)=@_;
7551: if ($rndseed =~/([,:])/) {
7552: my ($num1,$num2)=split(/[,:]/,$rndseed);
7553: &Math::Random::random_set_seed(abs($num1),abs($num2));
7554: } else {
7555: &Math::Random::random_set_seed_from_phrase($rndseed);
7556: }
7557: }
7558:
7559: sub latest_receipt_algorithm_id {
7560: return 'receipt3';
7561: }
7562:
7563: sub recunique {
7564: my $fucourseid=shift;
7565: my $unique;
7566: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
7567: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7568: $unique=$env{"course.$fucourseid.internal.encseed"};
7569: } else {
7570: $unique=$perlvar{'lonReceipt'};
7571: }
7572: return unpack("%32C*",$unique);
7573: }
7574:
7575: sub recprefix {
7576: my $fucourseid=shift;
7577: my $prefix;
7578: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2'||
7579: $env{"course.$fucourseid.receiptalg"} eq 'receipt3' ) {
7580: $prefix=$env{"course.$fucourseid.internal.encpref"};
7581: } else {
7582: $prefix=$perlvar{'lonHostID'};
7583: }
7584: return unpack("%32C*",$prefix);
7585: }
7586:
7587: sub ireceipt {
7588: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
7589:
7590: my $return =&recprefix($fucourseid).'-';
7591:
7592: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt3' ||
7593: $env{'request.state'} eq 'construct') {
7594: $return .= (&digest("$funame,$fudom,$fucourseid,$fusymb,$part")%10000);
7595: return $return;
7596: }
7597:
7598: my $cuname=unpack("%32C*",$funame);
7599: my $cudom=unpack("%32C*",$fudom);
7600: my $cucourseid=unpack("%32C*",$fucourseid);
7601: my $cusymb=unpack("%32C*",$fusymb);
7602: my $cunique=&recunique($fucourseid);
7603: my $cpart=unpack("%32S*",$part);
7604: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
7605:
7606: #&logthis("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname)." and ".($cpart%$cudom));
7607:
7608: $return.= ($cunique%$cuname+
7609: $cunique%$cudom+
7610: $cusymb%$cuname+
7611: $cusymb%$cudom+
7612: $cucourseid%$cuname+
7613: $cucourseid%$cudom+
7614: $cpart%$cuname+
7615: $cpart%$cudom);
7616: } else {
7617: $return.= ($cunique%$cuname+
7618: $cunique%$cudom+
7619: $cusymb%$cuname+
7620: $cusymb%$cudom+
7621: $cucourseid%$cuname+
7622: $cucourseid%$cudom);
7623: }
7624: return $return;
7625: }
7626:
7627: sub receipt {
7628: my ($part)=@_;
7629: my ($symb,$courseid,$domain,$name) = &whichuser();
7630: return &ireceipt($name,$domain,$courseid,$symb,$part);
7631: }
7632:
7633: sub whichuser {
7634: my ($passedsymb)=@_;
7635: my ($symb,$courseid,$domain,$name,$publicuser);
7636: if (defined($env{'form.grade_symb'})) {
7637: my ($tmp_courseid)=&get_env_multiple('form.grade_courseid');
7638: my $allowed=&allowed('vgr',$tmp_courseid);
7639: if (!$allowed &&
7640: exists($env{'request.course.sec'}) &&
7641: $env{'request.course.sec'} !~ /^\s*$/) {
7642: $allowed=&allowed('vgr',$tmp_courseid.
7643: '/'.$env{'request.course.sec'});
7644: }
7645: if ($allowed) {
7646: ($symb)=&get_env_multiple('form.grade_symb');
7647: $courseid=$tmp_courseid;
7648: ($domain)=&get_env_multiple('form.grade_domain');
7649: ($name)=&get_env_multiple('form.grade_username');
7650: return ($symb,$courseid,$domain,$name,$publicuser);
7651: }
7652: }
7653: if (!$passedsymb) {
7654: $symb=&symbread();
7655: } else {
7656: $symb=$passedsymb;
7657: }
7658: $courseid=$env{'request.course.id'};
7659: $domain=$env{'user.domain'};
7660: $name=$env{'user.name'};
7661: if ($name eq 'public' && $domain eq 'public') {
7662: if (!defined($env{'form.username'})) {
7663: $env{'form.username'}.=time.rand(10000000);
7664: }
7665: $name.=$env{'form.username'};
7666: }
7667: return ($symb,$courseid,$domain,$name,$publicuser);
7668:
7669: }
7670:
7671: # ------------------------------------------------------------ Serves up a file
7672: # returns either the contents of the file or
7673: # -1 if the file doesn't exist
7674: #
7675: # if the target is a file that was uploaded via DOCS,
7676: # a check will be made to see if a current copy exists on the local server,
7677: # if it does this will be served, otherwise a copy will be retrieved from
7678: # the home server for the course and stored in /home/httpd/html/userfiles on
7679: # the local server.
7680:
7681: sub getfile {
7682: my ($file) = @_;
7683: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7684: &repcopy($file);
7685: return &readfile($file);
7686: }
7687:
7688: sub repcopy_userfile {
7689: my ($file)=@_;
7690: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
7691: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
7692: my ($cdom,$cnum,$filename) =
7693: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+($match_domain)/+($match_name)/+(.*)|);
7694: my $uri="/uploaded/$cdom/$cnum/$filename";
7695: if (-e "$file") {
7696: # we already have a local copy, check it out
7697: my @fileinfo = stat($file);
7698: my $rtncode;
7699: my $info;
7700: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
7701: if ($lwpresp ne 'ok') {
7702: # there is no such file anymore, even though we had a local copy
7703: if ($rtncode eq '404') {
7704: unlink($file);
7705: }
7706: return -1;
7707: }
7708: if ($info < $fileinfo[9]) {
7709: # nice, the file we have is up-to-date, just say okay
7710: return 'ok';
7711: } else {
7712: # the file is outdated, get rid of it
7713: unlink($file);
7714: }
7715: }
7716: # one way or the other, at this point, we don't have the file
7717: # construct the correct path for the file
7718: my @parts = ($cdom,$cnum);
7719: if ($filename =~ m|^(.+)/[^/]+$|) {
7720: push @parts, split(/\//,$1);
7721: }
7722: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
7723: foreach my $part (@parts) {
7724: $path .= '/'.$part;
7725: if (!-e $path) {
7726: mkdir($path,0770);
7727: }
7728: }
7729: # now the path exists for sure
7730: # get a user agent
7731: my $ua=new LWP::UserAgent;
7732: my $transferfile=$file.'.in.transfer';
7733: # FIXME: this should flock
7734: if (-e $transferfile) { return 'ok'; }
7735: my $request;
7736: $uri=~s/^\///;
7737: $request=new HTTP::Request('GET','http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri);
7738: my $response=$ua->request($request,$transferfile);
7739: # did it work?
7740: if ($response->is_error()) {
7741: unlink($transferfile);
7742: &logthis("Userfile repcopy failed for $uri");
7743: return -1;
7744: }
7745: # worked, rename the transfer file
7746: rename($transferfile,$file);
7747: return 'ok';
7748: }
7749:
7750: sub tokenwrapper {
7751: my $uri=shift;
7752: $uri=~s|^http\://([^/]+)||;
7753: $uri=~s|^/||;
7754: $env{'user.environment'}=~/\/([^\/]+)\.id/;
7755: my $token=$1;
7756: my (undef,$udom,$uname,$file)=split('/',$uri,4);
7757: if ($udom && $uname && $file) {
7758: $file=~s|(\?\.*)*$||;
7759: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
7760: return 'http://'.&hostname(&homeserver($uname,$udom)).'/'.$uri.
7761: (($uri=~/\?/)?'&':'?').'token='.$token.
7762: '&tokenissued='.$perlvar{'lonHostID'};
7763: } else {
7764: return '/adm/notfound.html';
7765: }
7766: }
7767:
7768: # call with reqtype HEAD: get last modification time
7769: # call with reqtype GET: get the file contents
7770: # Do not call this with reqtype GET for large files! It loads everything into memory
7771: #
7772: sub getuploaded {
7773: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
7774: $uri=~s/^\///;
7775: $uri = 'http://'.&hostname(&homeserver($cnum,$cdom)).'/raw/'.$uri;
7776: my $ua=new LWP::UserAgent;
7777: my $request=new HTTP::Request($reqtype,$uri);
7778: my $response=$ua->request($request);
7779: $$rtncode = $response->code;
7780: if (! $response->is_success()) {
7781: return 'failed';
7782: }
7783: if ($reqtype eq 'HEAD') {
7784: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
7785: } elsif ($reqtype eq 'GET') {
7786: $$info = $response->content;
7787: }
7788: return 'ok';
7789: }
7790:
7791: sub readfile {
7792: my $file = shift;
7793: if ( (! -e $file ) || ($file eq '') ) { return -1; };
7794: my $fh;
7795: open($fh,"<$file");
7796: my $a='';
7797: while (my $line = <$fh>) { $a .= $line; }
7798: return $a;
7799: }
7800:
7801: sub filelocation {
7802: my ($dir,$file) = @_;
7803: my $location;
7804: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
7805:
7806: if ($file =~ m-^/adm/-) {
7807: $file=~s-^/adm/wrapper/-/-;
7808: $file=~s-^/adm/coursedocs/showdoc/-/-;
7809: }
7810:
7811: if ($file=~m:^/~:) { # is a contruction space reference
7812: $location = $file;
7813: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
7814: } elsif ($file=~m{^/home/$match_username/public_html/}) {
7815: # is a correct contruction space reference
7816: $location = $file;
7817: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
7818: my ($udom,$uname,$filename)=
7819: ($file=~m -^/+(?:uploaded|editupload)/+($match_domain)/+($match_name)/+(.*)$-);
7820: my $home=&homeserver($uname,$udom);
7821: my $is_me=0;
7822: my @ids=¤t_machine_ids();
7823: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
7824: if ($is_me) {
7825: $location=&propath($udom,$uname).
7826: '/userfiles/'.$filename;
7827: } else {
7828: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
7829: $udom.'/'.$uname.'/'.$filename;
7830: }
7831: } elsif ($file =~ m-^/adm/-) {
7832: $location = $perlvar{'lonDocRoot'}.'/'.$file;
7833: } else {
7834: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7835: $file=~s:^/res/:/:;
7836: if ( !( $file =~ m:^/:) ) {
7837: $location = $dir. '/'.$file;
7838: } else {
7839: $location = '/home/httpd/html/res'.$file;
7840: }
7841: }
7842: $location=~s://+:/:g; # remove duplicate /
7843: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
7844: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
7845: return $location;
7846: }
7847:
7848: sub hreflocation {
7849: my ($dir,$file)=@_;
7850: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
7851: $file=filelocation($dir,$file);
7852: } elsif ($file=~m-^/adm/-) {
7853: $file=~s-^/adm/wrapper/-/-;
7854: $file=~s-^/adm/coursedocs/showdoc/-/-;
7855: }
7856: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
7857: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
7858: } elsif ($file=~m-/home/($match_username)/public_html/-) {
7859: $file=~s-^/home/($match_username)/public_html/-/~$1/-;
7860: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
7861: $file=~s-^/home/httpd/lonUsers/($match_domain)/./././($match_name)/userfiles/
7862: -/uploaded/$1/$2/-x;
7863: }
7864: if ($file=~ m{^/userfiles/}) {
7865: $file =~ s{^/userfiles/}{/uploaded/};
7866: }
7867: return $file;
7868: }
7869:
7870: sub current_machine_domains {
7871: return &machine_domains(&hostname($perlvar{'lonHostID'}));
7872: }
7873:
7874: sub machine_domains {
7875: my ($hostname) = @_;
7876: my @domains;
7877: my %hostname = &all_hostnames();
7878: while( my($id, $name) = each(%hostname)) {
7879: # &logthis("-$id-$name-$hostname-");
7880: if ($hostname eq $name) {
7881: push(@domains,&host_domain($id));
7882: }
7883: }
7884: return @domains;
7885: }
7886:
7887: sub current_machine_ids {
7888: return &machine_ids(&hostname($perlvar{'lonHostID'}));
7889: }
7890:
7891: sub machine_ids {
7892: my ($hostname) = @_;
7893: $hostname ||= &hostname($perlvar{'lonHostID'});
7894: my @ids;
7895: my %name_to_host = &all_names();
7896: if (ref($name_to_host{$hostname}) eq 'ARRAY') {
7897: return @{ $name_to_host{$hostname} };
7898: }
7899: return;
7900: }
7901:
7902: sub additional_machine_domains {
7903: my @domains;
7904: open(my $fh,"<$perlvar{'lonTabDir'}/expected_domains.tab");
7905: while( my $line = <$fh>) {
7906: $line =~ s/\s//g;
7907: push(@domains,$line);
7908: }
7909: return @domains;
7910: }
7911:
7912: sub default_login_domain {
7913: my $domain = $perlvar{'lonDefDomain'};
7914: my $testdomain=(split(/\./,$ENV{'HTTP_HOST'}))[0];
7915: foreach my $posdom (¤t_machine_domains(),
7916: &additional_machine_domains()) {
7917: if (lc($posdom) eq lc($testdomain)) {
7918: $domain=$posdom;
7919: last;
7920: }
7921: }
7922: return $domain;
7923: }
7924:
7925: # ------------------------------------------------------------- Declutters URLs
7926:
7927: sub declutter {
7928: my $thisfn=shift;
7929: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7930: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7931: $thisfn=~s/^\///;
7932: $thisfn=~s|^adm/wrapper/||;
7933: $thisfn=~s|^adm/coursedocs/showdoc/||;
7934: $thisfn=~s/^res\///;
7935: $thisfn=~s/\?.+$//;
7936: return $thisfn;
7937: }
7938:
7939: # ------------------------------------------------------------- Clutter up URLs
7940:
7941: sub clutter {
7942: my $thisfn='/'.&declutter(shift);
7943: if ($thisfn !~ m{^/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)/}
7944: || $thisfn =~ m{^/adm/(includes|pages)} ) {
7945: $thisfn='/res'.$thisfn;
7946: }
7947: if ($thisfn !~m|/adm|) {
7948: if ($thisfn =~ m|/ext/|) {
7949: $thisfn='/adm/wrapper'.$thisfn;
7950: } else {
7951: my ($ext) = ($thisfn =~ /\.(\w+)$/);
7952: my $embstyle=&Apache::loncommon::fileembstyle($ext);
7953: if ($embstyle eq 'ssi'
7954: || ($embstyle eq 'hdn')
7955: || ($embstyle eq 'rat')
7956: || ($embstyle eq 'prv')
7957: || ($embstyle eq 'ign')) {
7958: #do nothing with these
7959: } elsif (($embstyle eq 'img')
7960: || ($embstyle eq 'emb')
7961: || ($embstyle eq 'wrp')) {
7962: $thisfn='/adm/wrapper'.$thisfn;
7963: } elsif ($embstyle eq 'unk'
7964: && $thisfn!~/\.(sequence|page)$/) {
7965: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
7966: } else {
7967: # &logthis("Got a blank emb style");
7968: }
7969: }
7970: }
7971: return $thisfn;
7972: }
7973:
7974: sub clutter_with_no_wrapper {
7975: my $uri = &clutter(shift);
7976: if ($uri =~ m-^/adm/-) {
7977: $uri =~ s-^/adm/wrapper/-/-;
7978: $uri =~ s-^/adm/coursedocs/showdoc/-/-;
7979: }
7980: return $uri;
7981: }
7982:
7983: sub freeze_escape {
7984: my ($value)=@_;
7985: if (ref($value)) {
7986: $value=&nfreeze($value);
7987: return '__FROZEN__'.&escape($value);
7988: }
7989: return &escape($value);
7990: }
7991:
7992:
7993: sub thaw_unescape {
7994: my ($value)=@_;
7995: if ($value =~ /^__FROZEN__/) {
7996: substr($value,0,10,undef);
7997: $value=&unescape($value);
7998: return &thaw($value);
7999: }
8000: return &unescape($value);
8001: }
8002:
8003: sub correct_line_ends {
8004: my ($result)=@_;
8005: $$result =~s/\r\n/\n/mg;
8006: $$result =~s/\r/\n/mg;
8007: }
8008: # ================================================================ Main Program
8009:
8010: sub goodbye {
8011: &logthis("Starting Shut down");
8012: #not converted to using infrastruture and probably shouldn't be
8013: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&nfreeze(\%badServerCache))));
8014: #converted
8015: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
8016: &logthis(sprintf("%-20s is %s",'%homecache',length(&nfreeze(\%homecache))));
8017: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&nfreeze(\%titlecache))));
8018: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&nfreeze(\%courseresdatacache))));
8019: #1.1 only
8020: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&nfreeze(\%userresdatacache))));
8021: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&nfreeze(\%getsectioncache))));
8022: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&nfreeze(\%courseresversioncache))));
8023: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&nfreeze(\%resversioncache))));
8024: &logthis(sprintf("%-20s is %s",'%remembered',length(&nfreeze(\%remembered))));
8025: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
8026: &logthis(sprintf("%-20s is %s",'hits',$hits));
8027: &flushcourselogs();
8028: &logthis("Shutting down");
8029: }
8030:
8031: sub get_dns {
8032: my ($url,$func,$ignore_cache) = @_;
8033: if (!$ignore_cache) {
8034: my ($content,$cached)=
8035: &Apache::lonnet::is_cached_new('dns',$url);
8036: if ($cached) {
8037: &$func($content);
8038: return;
8039: }
8040: }
8041:
8042: my %alldns;
8043: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
8044: foreach my $dns (<$config>) {
8045: next if ($dns !~ /^\^(\S*)/x);
8046: $alldns{$1} = 1;
8047: }
8048: while (%alldns) {
8049: my ($dns) = keys(%alldns);
8050: delete($alldns{$dns});
8051: my $ua=new LWP::UserAgent;
8052: my $request=new HTTP::Request('GET',"http://$dns$url");
8053: my $response=$ua->request($request);
8054: next if ($response->is_error());
8055: my @content = split("\n",$response->content);
8056: &Apache::lonnet::do_cache_new('dns',$url,\@content,30*24*60*60);
8057: &$func(\@content);
8058: return;
8059: }
8060: close($config);
8061: my $which = (split('/',$url))[3];
8062: &logthis("unable to contact DNS defaulting to on disk file dns_$which.tab\n");
8063: open($config,"<$perlvar{'lonTabDir'}/dns_$which.tab");
8064: my @content = <$config>;
8065: &$func(\@content);
8066: return;
8067: }
8068: # ------------------------------------------------------------ Read domain file
8069: {
8070: my $loaded;
8071: my %domain;
8072:
8073: sub parse_domain_tab {
8074: my ($lines) = @_;
8075: foreach my $line (@$lines) {
8076: next if ($line =~ /^(\#|\s*$ )/x);
8077:
8078: chomp($line);
8079: my ($name,@elements) = split(/:/,$line,9);
8080: my %this_domain;
8081: foreach my $field ('description', 'auth_def', 'auth_arg_def',
8082: 'lang_def', 'city', 'longi', 'lati',
8083: 'primary') {
8084: $this_domain{$field} = shift(@elements);
8085: }
8086: $domain{$name} = \%this_domain;
8087: }
8088: }
8089:
8090: sub reset_domain_info {
8091: undef($loaded);
8092: undef(%domain);
8093: }
8094:
8095: sub load_domain_tab {
8096: my ($ignore_cache) = @_;
8097: &get_dns('/adm/dns/domain',\&parse_domain_tab,$ignore_cache);
8098: my $fh;
8099: if (open($fh,"<".$perlvar{'lonTabDir'}.'/domain.tab')) {
8100: my @lines = <$fh>;
8101: &parse_domain_tab(\@lines);
8102: }
8103: close($fh);
8104: $loaded = 1;
8105: }
8106:
8107: sub domain {
8108: &load_domain_tab() if (!$loaded);
8109:
8110: my ($name,$what) = @_;
8111: return if ( !exists($domain{$name}) );
8112:
8113: if (!$what) {
8114: return $domain{$name}{'description'};
8115: }
8116: return $domain{$name}{$what};
8117: }
8118: }
8119:
8120:
8121: # ------------------------------------------------------------- Read hosts file
8122: {
8123: my %hostname;
8124: my %hostdom;
8125: my %libserv;
8126: my $loaded;
8127: my %name_to_host;
8128:
8129: sub parse_hosts_tab {
8130: my ($file) = @_;
8131: foreach my $configline (@$file) {
8132: next if ($configline =~ /^(\#|\s*$ )/x);
8133: next if ($configline =~ /^\^/);
8134: chomp($configline);
8135: my ($id,$domain,$role,$name)=split(/:/,$configline);
8136: $name=~s/\s//g;
8137: if ($id && $domain && $role && $name) {
8138: $hostname{$id}=$name;
8139: push(@{$name_to_host{$name}}, $id);
8140: $hostdom{$id}=$domain;
8141: if ($role eq 'library') { $libserv{$id}=$name; }
8142: }
8143: }
8144: }
8145:
8146: sub reset_hosts_info {
8147: &purge_remembered();
8148: &reset_domain_info();
8149: &reset_hosts_ip_info();
8150: undef(%name_to_host);
8151: undef(%hostname);
8152: undef(%hostdom);
8153: undef(%libserv);
8154: undef($loaded);
8155: }
8156:
8157: sub load_hosts_tab {
8158: my ($ignore_cache) = @_;
8159: &get_dns('/adm/dns/hosts',\&parse_hosts_tab,$ignore_cache);
8160: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
8161: my @config = <$config>;
8162: &parse_hosts_tab(\@config);
8163: close($config);
8164: $loaded=1;
8165: }
8166:
8167: sub hostname {
8168: &load_hosts_tab() if (!$loaded);
8169:
8170: my ($lonid) = @_;
8171: return $hostname{$lonid};
8172: }
8173:
8174: sub all_hostnames {
8175: &load_hosts_tab() if (!$loaded);
8176:
8177: return %hostname;
8178: }
8179:
8180: sub all_names {
8181: &load_hosts_tab() if (!$loaded);
8182:
8183: return %name_to_host;
8184: }
8185:
8186: sub is_library {
8187: &load_hosts_tab() if (!$loaded);
8188:
8189: return exists($libserv{$_[0]});
8190: }
8191:
8192: sub all_library {
8193: &load_hosts_tab() if (!$loaded);
8194:
8195: return %libserv;
8196: }
8197:
8198: sub get_servers {
8199: &load_hosts_tab() if (!$loaded);
8200:
8201: my ($domain,$type) = @_;
8202: my %possible_hosts = ($type eq 'library') ? %libserv
8203: : %hostname;
8204: my %result;
8205: if (ref($domain) eq 'ARRAY') {
8206: while ( my ($host,$hostname) = each(%possible_hosts)) {
8207: if (grep(/^\Q$hostdom{$host}\E$/,@$domain)) {
8208: $result{$host} = $hostname;
8209: }
8210: }
8211: } else {
8212: while ( my ($host,$hostname) = each(%possible_hosts)) {
8213: if ($hostdom{$host} eq $domain) {
8214: $result{$host} = $hostname;
8215: }
8216: }
8217: }
8218: return %result;
8219: }
8220:
8221: sub host_domain {
8222: &load_hosts_tab() if (!$loaded);
8223:
8224: my ($lonid) = @_;
8225: return $hostdom{$lonid};
8226: }
8227:
8228: sub all_domains {
8229: &load_hosts_tab() if (!$loaded);
8230:
8231: my %seen;
8232: my @uniq = grep(!$seen{$_}++, values(%hostdom));
8233: return @uniq;
8234: }
8235: }
8236:
8237: {
8238: my %iphost;
8239: my %name_to_ip;
8240: my %lonid_to_ip;
8241:
8242: sub get_hosts_from_ip {
8243: my ($ip) = @_;
8244: my %iphosts = &get_iphost();
8245: if (ref($iphosts{$ip})) {
8246: return @{$iphosts{$ip}};
8247: }
8248: return;
8249: }
8250:
8251: sub reset_hosts_ip_info {
8252: undef(%iphost);
8253: undef(%name_to_ip);
8254: undef(%lonid_to_ip);
8255: }
8256:
8257: sub get_host_ip {
8258: my ($lonid) = @_;
8259: if (exists($lonid_to_ip{$lonid})) {
8260: return $lonid_to_ip{$lonid};
8261: }
8262: my $name=&hostname($lonid);
8263: my $ip = gethostbyname($name);
8264: return if (!$ip || length($ip) ne 4);
8265: $ip=inet_ntoa($ip);
8266: $name_to_ip{$name} = $ip;
8267: $lonid_to_ip{$lonid} = $ip;
8268: return $ip;
8269: }
8270:
8271: sub get_iphost {
8272: my ($ignore_cache) = @_;
8273:
8274: if (!$ignore_cache) {
8275: if (%iphost) {
8276: return %iphost;
8277: }
8278: my ($ip_info,$cached)=
8279: &Apache::lonnet::is_cached_new('iphost','iphost');
8280: if ($cached) {
8281: %iphost = %{$ip_info->[0]};
8282: %name_to_ip = %{$ip_info->[1]};
8283: %lonid_to_ip = %{$ip_info->[2]};
8284: return %iphost;
8285: }
8286: }
8287:
8288: # get yesterday's info for fallback
8289: my %old_name_to_ip;
8290: my ($ip_info,$cached)=
8291: &Apache::lonnet::is_cached_new('iphost','iphost');
8292: if ($cached) {
8293: %old_name_to_ip = %{$ip_info->[1]};
8294: }
8295:
8296: my %name_to_host = &all_names();
8297: foreach my $name (keys(%name_to_host)) {
8298: my $ip;
8299: if (!exists($name_to_ip{$name})) {
8300: $ip = gethostbyname($name);
8301: if (!$ip || length($ip) ne 4) {
8302: if (defined($old_name_to_ip{$name})) {
8303: $ip = $old_name_to_ip{$name};
8304: &logthis("Can't find $name defaulting to old $ip");
8305: } else {
8306: &logthis("Name $name no IP found");
8307: next;
8308: }
8309: } else {
8310: $ip=inet_ntoa($ip);
8311: }
8312: $name_to_ip{$name} = $ip;
8313: } else {
8314: $ip = $name_to_ip{$name};
8315: }
8316: foreach my $id (@{ $name_to_host{$name} }) {
8317: $lonid_to_ip{$id} = $ip;
8318: }
8319: push(@{$iphost{$ip}},@{$name_to_host{$name}});
8320: }
8321: &Apache::lonnet::do_cache_new('iphost','iphost',
8322: [\%iphost,\%name_to_ip,\%lonid_to_ip],
8323: 48*60*60);
8324:
8325: return %iphost;
8326: }
8327: }
8328:
8329: BEGIN {
8330:
8331: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
8332: unless ($readit) {
8333: {
8334: my $configvars = LONCAPA::Configuration::read_conf('loncapa.conf');
8335: %perlvar = (%perlvar,%{$configvars});
8336: }
8337:
8338:
8339: # ------------------------------------------------------ Read spare server file
8340: {
8341: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
8342:
8343: while (my $configline=<$config>) {
8344: chomp($configline);
8345: if ($configline) {
8346: my ($host,$type) = split(':',$configline,2);
8347: if (!defined($type) || $type eq '') { $type = 'default' };
8348: push(@{ $spareid{$type} }, $host);
8349: }
8350: }
8351: close($config);
8352: }
8353: # ------------------------------------------------------------ Read permissions
8354: {
8355: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
8356:
8357: while (my $configline=<$config>) {
8358: chomp($configline);
8359: if ($configline) {
8360: my ($role,$perm)=split(/ /,$configline);
8361: if ($perm ne '') { $pr{$role}=$perm; }
8362: }
8363: }
8364: close($config);
8365: }
8366:
8367: # -------------------------------------------- Read plain texts for permissions
8368: {
8369: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
8370:
8371: while (my $configline=<$config>) {
8372: chomp($configline);
8373: if ($configline) {
8374: my ($short,@plain)=split(/:/,$configline);
8375: %{$prp{$short}} = ();
8376: if (@plain > 0) {
8377: $prp{$short}{'std'} = $plain[0];
8378: for (my $i=1; $i<@plain; $i++) {
8379: $prp{$short}{'alt'.$i} = $plain[$i];
8380: }
8381: }
8382: }
8383: }
8384: close($config);
8385: }
8386:
8387: # ---------------------------------------------------------- Read package table
8388: {
8389: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
8390:
8391: while (my $configline=<$config>) {
8392: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
8393: chomp($configline);
8394: my ($short,$plain)=split(/:/,$configline);
8395: my ($pack,$name)=split(/\&/,$short);
8396: if ($plain ne '') {
8397: $packagetab{$pack.'&'.$name.'&name'}=$name;
8398: $packagetab{$short}=$plain;
8399: }
8400: }
8401: close($config);
8402: }
8403:
8404: # ------------- set up temporary directory
8405: {
8406: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
8407:
8408: }
8409:
8410: $memcache=new Cache::Memcached({'servers' => ['127.0.0.1:11211'],
8411: 'compress_threshold'=> 20_000,
8412: });
8413:
8414: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
8415: $dumpcount=0;
8416:
8417: &logtouch();
8418: &logthis('<font color="yellow">INFO: Read configuration</font>');
8419: $readit=1;
8420: {
8421: use integer;
8422: my $test=(2**32)+1;
8423: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
8424: &logthis(" Detected 64bit platform ($_64bit)");
8425: }
8426: }
8427: }
8428:
8429: 1;
8430: __END__
8431:
8432: =pod
8433:
8434: =head1 NAME
8435:
8436: Apache::lonnet - Subroutines to ask questions about things in the network.
8437:
8438: =head1 SYNOPSIS
8439:
8440: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
8441:
8442: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
8443:
8444: Common parameters:
8445:
8446: =over 4
8447:
8448: =item *
8449:
8450: $uname : an internal username (if $cname expecting a course Id specifically)
8451:
8452: =item *
8453:
8454: $udom : a domain (if $cdom expecting a course's domain specifically)
8455:
8456: =item *
8457:
8458: $symb : a resource instance identifier
8459:
8460: =item *
8461:
8462: $namespace : the name of a .db file that contains the data needed or
8463: being set.
8464:
8465: =back
8466:
8467: =head1 OVERVIEW
8468:
8469: lonnet provides subroutines which interact with the
8470: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
8471: about classes, users, and resources.
8472:
8473: For many of these objects you can also use this to store data about
8474: them or modify them in various ways.
8475:
8476: =head2 Symbs
8477:
8478: To identify a specific instance of a resource, LON-CAPA uses symbols
8479: or "symbs"X<symb>. These identifiers are built from the URL of the
8480: map, the resource number of the resource in the map, and the URL of
8481: the resource itself. The latter is somewhat redundant, but might help
8482: if maps change.
8483:
8484: An example is
8485:
8486: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
8487:
8488: The respective map entry is
8489:
8490: <resource id="19" src="/res/msu/korte/tests/part12.problem"
8491: title="Problem 2">
8492: </resource>
8493:
8494: Symbs are used by the random number generator, as well as to store and
8495: restore data specific to a certain instance of for example a problem.
8496:
8497: =head2 Storing And Retrieving Data
8498:
8499: X<store()>X<cstore()>X<restore()>Three of the most important functions
8500: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
8501: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
8502: is is the non-critical message twin of cstore. These functions are for
8503: handlers to store a perl hash to a user's permanent data space in an
8504: easy manner, and to retrieve it again on another call. It is expected
8505: that a handler would use this once at the beginning to retrieve data,
8506: and then again once at the end to send only the new data back.
8507:
8508: The data is stored in the user's data directory on the user's
8509: homeserver under the ID of the course.
8510:
8511: The hash that is returned by restore will have all of the previous
8512: value for all of the elements of the hash.
8513:
8514: Example:
8515:
8516: #creating a hash
8517: my %hash;
8518: $hash{'foo'}='bar';
8519:
8520: #storing it
8521: &Apache::lonnet::cstore(\%hash);
8522:
8523: #changing a value
8524: $hash{'foo'}='notbar';
8525:
8526: #adding a new value
8527: $hash{'bar'}='foo';
8528: &Apache::lonnet::cstore(\%hash);
8529:
8530: #retrieving the hash
8531: my %history=&Apache::lonnet::restore();
8532:
8533: #print the hash
8534: foreach my $key (sort(keys(%history))) {
8535: print("\%history{$key} = $history{$key}");
8536: }
8537:
8538: Will print out:
8539:
8540: %history{1:foo} = bar
8541: %history{1:keys} = foo:timestamp
8542: %history{1:timestamp} = 990455579
8543: %history{2:bar} = foo
8544: %history{2:foo} = notbar
8545: %history{2:keys} = foo:bar:timestamp
8546: %history{2:timestamp} = 990455580
8547: %history{bar} = foo
8548: %history{foo} = notbar
8549: %history{timestamp} = 990455580
8550: %history{version} = 2
8551:
8552: Note that the special hash entries C<keys>, C<version> and
8553: C<timestamp> were added to the hash. C<version> will be equal to the
8554: total number of versions of the data that have been stored. The
8555: C<timestamp> attribute will be the UNIX time the hash was
8556: stored. C<keys> is available in every historical section to list which
8557: keys were added or changed at a specific historical revision of a
8558: hash.
8559:
8560: B<Warning>: do not store the hash that restore returns directly. This
8561: will cause a mess since it will restore the historical keys as if the
8562: were new keys. I.E. 1:foo will become 1:1:foo etc.
8563:
8564: Calling convention:
8565:
8566: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
8567: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
8568:
8569: For more detailed information, see lonnet specific documentation.
8570:
8571: =head1 RETURN MESSAGES
8572:
8573: =over 4
8574:
8575: =item * B<con_lost>: unable to contact remote host
8576:
8577: =item * B<con_delayed>: unable to contact remote host, message will be delivered
8578: when the connection is brought back up
8579:
8580: =item * B<con_failed>: unable to contact remote host and unable to save message
8581: for later delivery
8582:
8583: =item * B<error:>: an error a occured, a description of the error follows the :
8584:
8585: =item * B<no_such_host>: unable to fund a host associated with the user/domain
8586: that was requested
8587:
8588: =back
8589:
8590: =head1 PUBLIC SUBROUTINES
8591:
8592: =head2 Session Environment Functions
8593:
8594: =over 4
8595:
8596: =item *
8597: X<appenv()>
8598: B<appenv(%hash)>: the value of %hash is written to
8599: the user envirnoment file, and will be restored for each access this
8600: user makes during this session, also modifies the %env for the current
8601: process
8602:
8603: =item *
8604: X<delenv()>
8605: B<delenv($regexp)>: removes all items from the session
8606: environment file that matches the regular expression in $regexp. The
8607: values are also delted from the current processes %env.
8608:
8609: =item * get_env_multiple($name)
8610:
8611: gets $name from the %env hash, it seemlessly handles the cases where multiple
8612: values may be defined and end up as an array ref.
8613:
8614: returns an array of values
8615:
8616: =back
8617:
8618: =head2 User Information
8619:
8620: =over 4
8621:
8622: =item *
8623: X<queryauthenticate()>
8624: B<queryauthenticate($uname,$udom)>: try to determine user's current
8625: authentication scheme
8626:
8627: =item *
8628: X<authenticate()>
8629: B<authenticate($uname,$upass,$udom)>: try to
8630: authenticate user from domain's lib servers (first use the current
8631: one). C<$upass> should be the users password.
8632:
8633: =item *
8634: X<homeserver()>
8635: B<homeserver($uname,$udom)>: find the server which has
8636: the user's directory and files (there must be only one), this caches
8637: the answer, and also caches if there is a borken connection.
8638:
8639: =item *
8640: X<idget()>
8641: B<idget($udom,@ids)>: find the usernames behind a list of IDs
8642: (IDs are a unique resource in a domain, there must be only 1 ID per
8643: username, and only 1 username per ID in a specific domain) (returns
8644: hash: id=>name,id=>name)
8645:
8646: =item *
8647: X<idrget()>
8648: B<idrget($udom,@unames)>: find the IDs behind a list of
8649: usernames (returns hash: name=>id,name=>id)
8650:
8651: =item *
8652: X<idput()>
8653: B<idput($udom,%ids)>: store away a list of names and associated IDs
8654:
8655: =item *
8656: X<rolesinit()>
8657: B<rolesinit($udom,$username,$authhost)>: get user privileges
8658:
8659: =item *
8660: X<getsection()>
8661: B<getsection($udom,$uname,$cname)>: finds the section of student in the
8662: course $cname, return section name/number or '' for "not in course"
8663: and '-1' for "no section"
8664:
8665: =item *
8666: X<userenvironment()>
8667: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
8668: passed in @what from the requested user's environment, returns a hash
8669:
8670: =item *
8671: X<userlog_query()>
8672: B<userlog_query($uname,$udom,%filters)>: retrieves data from a user's
8673: activity.log file. %filters defines filters applied when parsing the
8674: log file. These can be start or end timestamps, or the type of action
8675: - log to look for Login or Logout events, check for Checkin or
8676: Checkout, role for role selection. The response is in the form
8677: timestamp1:hostid1:event1×tamp2:hostid2:event2 where events are
8678: escaped strings of the action recorded in the activity.log file.
8679:
8680: =back
8681:
8682: =head2 User Roles
8683:
8684: =over 4
8685:
8686: =item *
8687:
8688: allowed($priv,$uri,$symb,$role) : check for a user privilege; returns codes for allowed actions
8689: F: full access
8690: U,I,K: authentication modes (cxx only)
8691: '': forbidden
8692: 1: user needs to choose course
8693: 2: browse allowed
8694: A: passphrase authentication needed
8695:
8696: =item *
8697:
8698: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
8699: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
8700: and course level
8701:
8702: =item *
8703:
8704: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
8705: explanation of a user role term
8706:
8707: =item *
8708:
8709: get_my_roles($uname,$udom,$context,$types,$roles,$roledoms) :
8710: All arguments are optional. Returns a hash of a roles, either for
8711: co-author/assistant author roles for a user's Construction Space
8712: (default), or if $context is 'userroles', roles for the user himself,
8713: In the hash, keys are set to colon-sparated $uname,$udom,and $role,
8714: and value is set to colon-separated start and end times for the role.
8715: If no username and domain are specified, will default to current
8716: user/domain. Types, roles, and roledoms are references to arrays,
8717: of role statuses (active, future or previous), roles
8718: (e.g., cc,in, st etc.) and domains of the roles which can be used
8719: to restrict the list of roles reported. If no array ref is
8720: provided for types, will default to return only active roles.
8721:
8722: =back
8723:
8724: =head2 User Modification
8725:
8726: =over 4
8727:
8728: =item *
8729:
8730: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
8731: user for the level given by URL. Optional start and end dates (leave empty
8732: string or zero for "no date")
8733:
8734: =item *
8735:
8736: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
8737: change a users, password, possible return values are: ok,
8738: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
8739: refused
8740:
8741: =item *
8742:
8743: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
8744:
8745: =item *
8746:
8747: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
8748: modify user
8749:
8750: =item *
8751:
8752: modifystudent
8753:
8754: modify a students enrollment and identification information.
8755: The course id is resolved based on the current users environment.
8756: This means the envoking user must be a course coordinator or otherwise
8757: associated with a course.
8758:
8759: This call is essentially a wrapper for lonnet::modifyuser and
8760: lonnet::modify_student_enrollment
8761:
8762: Inputs:
8763:
8764: =over 4
8765:
8766: =item B<$udom> Students loncapa domain
8767:
8768: =item B<$uname> Students loncapa login name
8769:
8770: =item B<$uid> Students id/student number
8771:
8772: =item B<$umode> Students authentication mode
8773:
8774: =item B<$upass> Students password
8775:
8776: =item B<$first> Students first name
8777:
8778: =item B<$middle> Students middle name
8779:
8780: =item B<$last> Students last name
8781:
8782: =item B<$gene> Students generation
8783:
8784: =item B<$usec> Students section in course
8785:
8786: =item B<$end> Unix time of the roles expiration
8787:
8788: =item B<$start> Unix time of the roles start date
8789:
8790: =item B<$forceid> If defined, allow $uid to be changed
8791:
8792: =item B<$desiredhome> server to use as home server for student
8793:
8794: =back
8795:
8796: =item *
8797:
8798: modify_student_enrollment
8799:
8800: Change a students enrollment status in a class. The environment variable
8801: 'role.request.course' must be defined for this function to proceed.
8802:
8803: Inputs:
8804:
8805: =over 4
8806:
8807: =item $udom, students domain
8808:
8809: =item $uname, students name
8810:
8811: =item $uid, students user id
8812:
8813: =item $first, students first name
8814:
8815: =item $middle
8816:
8817: =item $last
8818:
8819: =item $gene
8820:
8821: =item $usec
8822:
8823: =item $end
8824:
8825: =item $start
8826:
8827: =back
8828:
8829:
8830: =item *
8831:
8832: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
8833: custom role; give a custom role to a user for the level given by URL. Specify
8834: name and domain of role author, and role name
8835:
8836: =item *
8837:
8838: revokerole($udom,$uname,$url,$role) : revoke a role for url
8839:
8840: =item *
8841:
8842: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
8843:
8844: =back
8845:
8846: =head2 Course Infomation
8847:
8848: =over 4
8849:
8850: =item *
8851:
8852: coursedescription($courseid) : returns a hash of information about the
8853: specified course id, including all environment settings for the
8854: course, the description of the course will be in the hash under the
8855: key 'description'
8856:
8857: =item *
8858:
8859: resdata($name,$domain,$type,@which) : request for current parameter
8860: setting for a specific $type, where $type is either 'course' or 'user',
8861: @what should be a list of parameters to ask about. This routine caches
8862: answers for 5 minutes.
8863:
8864: =item *
8865:
8866: get_courseresdata($courseid, $domain) : dump the entire course resource
8867: data base, returning a hash that is keyed by the resource name and has
8868: values that are the resource value. I believe that the timestamps and
8869: versions are also returned.
8870:
8871:
8872: =back
8873:
8874: =head2 Course Modification
8875:
8876: =over 4
8877:
8878: =item *
8879:
8880: writecoursepref($courseid,%prefs) : write preferences (environment
8881: database) for a course
8882:
8883: =item *
8884:
8885: createcourse($udom,$description,$url) : make/modify course
8886:
8887: =back
8888:
8889: =head2 Resource Subroutines
8890:
8891: =over 4
8892:
8893: =item *
8894:
8895: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
8896:
8897: =item *
8898:
8899: repcopy($filename) : subscribes to the requested file, and attempts to
8900: replicate from the owning library server, Might return
8901: 'unavailable', 'not_found', 'forbidden', 'ok', or
8902: 'bad_request', also attempts to grab the metadata for the
8903: resource. Expects the local filesystem pathname
8904: (/home/httpd/html/res/....)
8905:
8906: =back
8907:
8908: =head2 Resource Information
8909:
8910: =over 4
8911:
8912: =item *
8913:
8914: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
8915: a vairety of different possible values, $varname should be a request
8916: string, and the other parameters can be used to specify who and what
8917: one is asking about.
8918:
8919: Possible values for $varname are environment.lastname (or other item
8920: from the envirnment hash), user.name (or someother aspect about the
8921: user), resource.0.maxtries (or some other part and parameter of a
8922: resource)
8923:
8924: =item *
8925:
8926: directcondval($number) : get current value of a condition; reads from a state
8927: string
8928:
8929: =item *
8930:
8931: condval($condidx) : value of condition index based on state
8932:
8933: =item *
8934:
8935: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
8936: resource's metadata, $what should be either a specific key, or either
8937: 'keys' (to get a list of possible keys) or 'packages' to get a list of
8938: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
8939:
8940: this function automatically caches all requests
8941:
8942: =item *
8943:
8944: metadata_query($query,$custom,$customshow) : make a metadata query against the
8945: network of library servers; returns file handle of where SQL and regex results
8946: will be stored for query
8947:
8948: =item *
8949:
8950: symbread($filename) : return symbolic list entry (filename argument optional);
8951: returns the data handle
8952:
8953: =item *
8954:
8955: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
8956: a possible symb for the URL in $thisfn, and if is an encryypted
8957: resource that the user accessed using /enc/ returns a 1 on success, 0
8958: on failure, user must be in a course, as it assumes the existance of
8959: the course initial hash, and uses $env('request.course.id'}
8960:
8961:
8962: =item *
8963:
8964: symbclean($symb) : removes versions numbers from a symb, returns the
8965: cleaned symb
8966:
8967: =item *
8968:
8969: is_on_map($uri) : checks if the $uri is somewhere on the current
8970: course map, user must be in a course for it to work.
8971:
8972: =item *
8973:
8974: numval($salt) : return random seed value (addend for rndseed)
8975:
8976: =item *
8977:
8978: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
8979: a random seed, all arguments are optional, if they aren't sent it uses the
8980: environment to derive them. Note: if symb isn't sent and it can't get one
8981: from &symbread it will use the current time as its return value
8982:
8983: =item *
8984:
8985: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
8986: unfakeable, receipt
8987:
8988: =item *
8989:
8990: receipt() : API to ireceipt working off of env values; given out to users
8991:
8992: =item *
8993:
8994: countacc($url) : count the number of accesses to a given URL
8995:
8996: =item *
8997:
8998: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
8999:
9000: =item *
9001:
9002: checkin($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 $tcrsid)
9003:
9004: =item *
9005:
9006: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
9007:
9008: =item *
9009:
9010: devalidate($symb) : devalidate temporary spreadsheet calculations,
9011: forcing spreadsheet to reevaluate the resource scores next time.
9012:
9013: =back
9014:
9015: =head2 Storing/Retreiving Data
9016:
9017: =over 4
9018:
9019: =item *
9020:
9021: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
9022: for this url; hashref needs to be given and should be a \%hashname; the
9023: remaining args aren't required and if they aren't passed or are '' they will
9024: be derived from the env
9025:
9026: =item *
9027:
9028: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
9029: uses critical subroutine
9030:
9031: =item *
9032:
9033: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
9034: all args are optional
9035:
9036: =item *
9037:
9038: dumpstore($namespace,$udom,$uname,$regexp,$range) :
9039: dumps the complete (or key matching regexp) namespace into a hash
9040: ($udom, $uname, $regexp, $range are optional) for a namespace that is
9041: normally &store()ed into
9042:
9043: $range should be either an integer '100' (give me the first 100
9044: matching records)
9045: or be two integers sperated by a - with no spaces
9046: '30-50' (give me the 30th through the 50th matching
9047: records)
9048:
9049:
9050: =item *
9051:
9052: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
9053: replaces a &store() version of data with a replacement set of data
9054: for a particular resource in a namespace passed in the $storehash hash
9055: reference
9056:
9057: =item *
9058:
9059: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
9060: works very similar to store/cstore, but all data is stored in a
9061: temporary location and can be reset using tmpreset, $storehash should
9062: be a hash reference, returns nothing on success
9063:
9064: =item *
9065:
9066: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
9067: similar to restore, but all data is stored in a temporary location and
9068: can be reset using tmpreset. Returns a hash of values on success,
9069: error string otherwise.
9070:
9071: =item *
9072:
9073: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
9074: deltes all keys for $symb form the temporary storage hash.
9075:
9076: =item *
9077:
9078: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
9079: reference filled in from namesp ($udom and $uname are optional)
9080:
9081: =item *
9082:
9083: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
9084: namesp ($udom and $uname are optional)
9085:
9086: =item *
9087:
9088: dump($namespace,$udom,$uname,$regexp,$range) :
9089: dumps the complete (or key matching regexp) namespace into a hash
9090: ($udom, $uname, $regexp, $range are optional)
9091:
9092: $range should be either an integer '100' (give me the first 100
9093: matching records)
9094: or be two integers sperated by a - with no spaces
9095: '30-50' (give me the 30th through the 50th matching
9096: records)
9097: =item *
9098:
9099: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
9100: $store can be a scalar, an array reference, or if the amount to be
9101: incremented is > 1, a hash reference.
9102:
9103: ($udom and $uname are optional)
9104:
9105: =item *
9106:
9107: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
9108: ($udom and $uname are optional)
9109:
9110: =item *
9111:
9112: cput($namespace,$storehash,$udom,$uname) : critical put
9113: ($udom and $uname are optional)
9114:
9115: =item *
9116:
9117: newput($namespace,$storehash,$udom,$uname) :
9118:
9119: Attempts to store the items in the $storehash, but only if they don't
9120: currently exist, if this succeeds you can be certain that you have
9121: successfully created a new key value pair in the $namespace db.
9122:
9123:
9124: Args:
9125: $namespace: name of database to store values to
9126: $storehash: hashref to store to the db
9127: $udom: (optional) domain of user containing the db
9128: $uname: (optional) name of user caontaining the db
9129:
9130: Returns:
9131: 'ok' -> succeeded in storing all keys of $storehash
9132: 'key_exists: <key>' -> failed to anything out of $storehash, as at
9133: least <key> already existed in the db (other
9134: requested keys may also already exist)
9135: 'error: <msg>' -> unable to tie the DB or other erorr occured
9136: 'con_lost' -> unable to contact request server
9137: 'refused' -> action was not allowed by remote machine
9138:
9139:
9140: =item *
9141:
9142: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
9143: reference filled in from namesp (encrypts the return communication)
9144: ($udom and $uname are optional)
9145:
9146: =item *
9147:
9148: log($udom,$name,$home,$message) : write to permanent log for user; use
9149: critical subroutine
9150:
9151: =item *
9152:
9153: get_dom($namespace,$storearr,$udom,$uhome) : returns hash with keys from
9154: array reference filled in from namespace found in domain level on either
9155: specified domain server ($uhome) or primary domain server ($udom and $uhome are optional).
9156:
9157: =item *
9158:
9159: put_dom($namespace,$storehash,$udom,$uhome) : stores hash in namespace at
9160: domain level either on specified domain server ($uhome) or primary domain
9161: server ($udom and $uhome are optional)
9162:
9163: =back
9164:
9165: =head2 Network Status Functions
9166:
9167: =over 4
9168:
9169: =item *
9170:
9171: dirlist($uri) : return directory list based on URI
9172:
9173: =item *
9174:
9175: spareserver() : find server with least workload from spare.tab
9176:
9177: =back
9178:
9179: =head2 Apache Request
9180:
9181: =over 4
9182:
9183: =item *
9184:
9185: ssi($url,%hash) : server side include, does a complete request cycle on url to
9186: localhost, posts hash
9187:
9188: =back
9189:
9190: =head2 Data to String to Data
9191:
9192: =over 4
9193:
9194: =item *
9195:
9196: hash2str(%hash) : convert a hash into a string complete with escaping and '='
9197: and '&' separators, supports elements that are arrayrefs and hashrefs
9198:
9199: =item *
9200:
9201: hashref2str($hashref) : convert a hashref into a string complete with
9202: escaping and '=' and '&' separators, supports elements that are
9203: arrayrefs and hashrefs
9204:
9205: =item *
9206:
9207: arrayref2str($arrayref) : convert an arrayref into a string complete
9208: with escaping and '&' separators, supports elements that are arrayrefs
9209: and hashrefs
9210:
9211: =item *
9212:
9213: str2hash($string) : convert string to hash using unescaping and
9214: splitting on '=' and '&', supports elements that are arrayrefs and
9215: hashrefs
9216:
9217: =item *
9218:
9219: str2array($string) : convert string to hash using unescaping and
9220: splitting on '&', supports elements that are arrayrefs and hashrefs
9221:
9222: =back
9223:
9224: =head2 Logging Routines
9225:
9226: =over 4
9227:
9228: These routines allow one to make log messages in the lonnet.log and
9229: lonnet.perm logfiles.
9230:
9231: =item *
9232:
9233: logtouch() : make sure the logfile, lonnet.log, exists
9234:
9235: =item *
9236:
9237: logthis() : append message to the normal lonnet.log file, it gets
9238: preiodically rolled over and deleted.
9239:
9240: =item *
9241:
9242: logperm() : append a permanent message to lonnet.perm.log, this log
9243: file never gets deleted by any automated portion of the system, only
9244: messages of critical importance should go in here.
9245:
9246: =back
9247:
9248: =head2 General File Helper Routines
9249:
9250: =over 4
9251:
9252: =item *
9253:
9254: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
9255: (a) files in /uploaded
9256: (i) If a local copy of the file exists -
9257: compares modification date of local copy with last-modified date for
9258: definitive version stored on home server for course. If local copy is
9259: stale, requests a new version from the home server and stores it.
9260: If the original has been removed from the home server, then local copy
9261: is unlinked.
9262: (ii) If local copy does not exist -
9263: requests the file from the home server and stores it.
9264:
9265: If $caller is 'uploadrep':
9266: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
9267: for request for files originally uploaded via DOCS.
9268: - returns 'ok' if fresh local copy now available, -1 otherwise.
9269:
9270: Otherwise:
9271: This indicates a call from the content generation phase of the request.
9272: - returns the entire contents of the file or -1.
9273:
9274: (b) files in /res
9275: - returns the entire contents of a file or -1;
9276: it properly subscribes to and replicates the file if neccessary.
9277:
9278:
9279: =item *
9280:
9281: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
9282: reference
9283:
9284: returns either a stat() list of data about the file or an empty list
9285: if the file doesn't exist or couldn't find out about it (connection
9286: problems or user unknown)
9287:
9288: =item *
9289:
9290: filelocation($dir,$file) : returns file system location of a file
9291: based on URI; meant to be "fairly clean" absolute reference, $dir is a
9292: directory that relative $file lookups are to looked in ($dir of /a/dir
9293: and a file of ../bob will become /a/bob)
9294:
9295: =item *
9296:
9297: hreflocation($dir,$file) : returns file system location or a URL; same as
9298: filelocation except for hrefs
9299:
9300: =item *
9301:
9302: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
9303:
9304: =back
9305:
9306: =head2 Usererfile file routines (/uploaded*)
9307:
9308: =over 4
9309:
9310: =item *
9311:
9312: userfileupload(): main rotine for putting a file in a user or course's
9313: filespace, arguments are,
9314:
9315: formname - required - this is the name of the element in $env where the
9316: filename, and the contents of the file to create/modifed exist
9317: the filename is in $env{'form.'.$formname.'.filename'} and the
9318: contents of the file is located in $env{'form.'.$formname}
9319: coursedoc - if true, store the file in the course of the active role
9320: of the current user
9321: subdir - required - subdirectory to put the file in under ../userfiles/
9322: if undefined, it will be placed in "unknown"
9323:
9324: (This routine calls clean_filename() to remove any dangerous
9325: characters from the filename, and then calls finuserfileupload() to
9326: complete the transaction)
9327:
9328: returns either the url of the uploaded file (/uploaded/....) if successful
9329: and /adm/notfound.html if unsuccessful
9330:
9331: =item *
9332:
9333: clean_filename(): routine for cleaing a filename up for storage in
9334: userfile space, argument is:
9335:
9336: filename - proposed filename
9337:
9338: returns: the new clean filename
9339:
9340: =item *
9341:
9342: finishuserfileupload(): routine that creaes and sends the file to
9343: userspace, probably shouldn't be called directly
9344:
9345: docuname: username or courseid of destination for the file
9346: docudom: domain of user/course of destination for the file
9347: formname: same as for userfileupload()
9348: fname: filename (inculding subdirectories) for the file
9349:
9350: returns either the url of the uploaded file (/uploaded/....) if successful
9351: and /adm/notfound.html if unsuccessful
9352:
9353: =item *
9354:
9355: renameuserfile(): renames an existing userfile to a new name
9356:
9357: Args:
9358: docuname: username or courseid of destination for the file
9359: docudom: domain of user/course of destination for the file
9360: old: current file name (including any subdirs under userfiles)
9361: new: desired file name (including any subdirs under userfiles)
9362:
9363: =item *
9364:
9365: mkdiruserfile(): creates a directory is a userfiles dir
9366:
9367: Args:
9368: docuname: username or courseid of destination for the file
9369: docudom: domain of user/course of destination for the file
9370: dir: dir to create (including any subdirs under userfiles)
9371:
9372: =item *
9373:
9374: removeuserfile(): removes a file that exists in userfiles
9375:
9376: Args:
9377: docuname: username or courseid of destination for the file
9378: docudom: domain of user/course of destination for the file
9379: fname: filname to delete (including any subdirs under userfiles)
9380:
9381: =item *
9382:
9383: removeuploadedurl(): convience function for removeuserfile()
9384:
9385: Args:
9386: url: a full /uploaded/... url to delete
9387:
9388: =item *
9389:
9390: get_portfile_permissions():
9391: Args:
9392: domain: domain of user or course contain the portfolio files
9393: user: name of user or num of course contain the portfolio files
9394: Returns:
9395: hashref of a dump of the proper file_permissions.db
9396:
9397:
9398: =item *
9399:
9400: get_access_controls():
9401:
9402: Args:
9403: current_permissions: the hash ref returned from get_portfile_permissions()
9404: group: (optional) the group you want the files associated with
9405: file: (optional) the file you want access info on
9406:
9407: Returns:
9408: a hash (keys are file names) of hashes containing
9409: keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
9410: values are XML containing access control settings (see below)
9411:
9412: Internal notes:
9413:
9414: access controls are stored in file_permissions.db as key=value pairs.
9415: key -> path to file/file_name\0uniqueID:scope_end_start
9416: where scope -> public,guest,course,group,domains or users.
9417: end -> UNIX time for end of access (0 -> no end date)
9418: start -> UNIX time for start of access
9419:
9420: value -> XML description of access control
9421: <scope type=""> (type =1 of: public,guest,course,group,domains,users">
9422: <start></start>
9423: <end></end>
9424:
9425: <password></password> for scope type = guest
9426:
9427: <domain></domain> for scope type = course or group
9428: <number></number>
9429: <roles id="">
9430: <role></role>
9431: <access></access>
9432: <section></section>
9433: <group></group>
9434: </roles>
9435:
9436: <dom></dom> for scope type = domains
9437:
9438: <users> for scope type = users
9439: <user>
9440: <uname></uname>
9441: <udom></udom>
9442: </user>
9443: </users>
9444: </scope>
9445:
9446: Access data is also aggregated for each file in an additional key=value pair:
9447: key -> path to file/file_name\0accesscontrol
9448: value -> reference to hash
9449: hash contains key = value pairs
9450: where key = uniqueID:scope_end_start
9451: value = UNIX time record was last updated
9452:
9453: Used to improve speed of look-ups of access controls for each file.
9454:
9455: Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
9456:
9457: modify_access_controls():
9458:
9459: Modifies access controls for a portfolio file
9460: Args
9461: 1. file name
9462: 2. reference to hash of required changes,
9463: 3. domain
9464: 4. username
9465: where domain,username are the domain of the portfolio owner
9466: (either a user or a course)
9467:
9468: Returns:
9469: 1. result of additions or updates ('ok' or 'error', with error message).
9470: 2. result of deletions ('ok' or 'error', with error message).
9471: 3. reference to hash of any new or updated access controls.
9472: 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
9473: key = integer (inbound ID)
9474: value = uniqueID
9475:
9476: =back
9477:
9478: =head2 HTTP Helper Routines
9479:
9480: =over 4
9481:
9482: =item *
9483:
9484: escape() : unpack non-word characters into CGI-compatible hex codes
9485:
9486: =item *
9487:
9488: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
9489:
9490: =back
9491:
9492: =head1 PRIVATE SUBROUTINES
9493:
9494: =head2 Underlying communication routines (Shouldn't call)
9495:
9496: =over 4
9497:
9498: =item *
9499:
9500: subreply() : tries to pass a message to lonc, returns con_lost if incapable
9501:
9502: =item *
9503:
9504: reply() : uses subreply to send a message to remote machine, logs all failures
9505:
9506: =item *
9507:
9508: critical() : passes a critical message to another server; if cannot
9509: get through then place message in connection buffer directory and
9510: returns con_delayed, if incapable of saving message, returns
9511: con_failed
9512:
9513: =item *
9514:
9515: reconlonc() : tries to reconnect lonc client processes.
9516:
9517: =back
9518:
9519: =head2 Resource Access Logging
9520:
9521: =over 4
9522:
9523: =item *
9524:
9525: flushcourselogs() : flush (save) buffer logs and access logs
9526:
9527: =item *
9528:
9529: courselog($what) : save message for course in hash
9530:
9531: =item *
9532:
9533: courseacclog($what) : save message for course using &courselog(). Perform
9534: special processing for specific resource types (problems, exams, quizzes, etc).
9535:
9536: =item *
9537:
9538: goodbye() : flush course logs and log shutting down; it is called in srm.conf
9539: as a PerlChildExitHandler
9540:
9541: =back
9542:
9543: =head2 Other
9544:
9545: =over 4
9546:
9547: =item *
9548:
9549: symblist($mapname,%newhash) : update symbolic storage links
9550:
9551: =back
9552:
9553: =cut
9554:
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