1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.417 2003/09/19 16:53:35 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: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 3/2 Gerd Kortemeyer
51: # 3/19,3/20 Gerd Kortemeyer
52: # 5/26,5/28 Gerd Kortemeyer
53: # 5/30 H. K. Ng
54: # 6/1 Gerd Kortemeyer
55: # July Guy Albertelli
56: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
57: # 10/2 Gerd Kortemeyer
58: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
59: # 12/5 Matthew Hall
60: # 12/5 Guy Albertelli
61: # 12/6,12/7,12/12 Gerd Kortemeyer
62: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
63: # YEAR=2002
64: # 1/4,2/4,2/7 Gerd Kortemeyer
65: #
66: ###
67:
68: package Apache::lonnet;
69:
70: use strict;
71: use Apache::File;
72: use LWP::UserAgent();
73: use HTTP::Headers;
74: use vars
75: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
76: %libserv %pr %prp %metacache %packagetab %titlecache
77: %courselogs %accesshash %userrolehash $processmarker $dumpcount
78: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache
79: %usectioncache %domaindescription %domain_auth_def %domain_auth_arg_def
80: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir);
81:
82: use IO::Socket;
83: use GDBM_File;
84: use Apache::Constants qw(:common :http);
85: use HTML::LCParser;
86: use Fcntl qw(:flock);
87: use Apache::loncoursedata;
88: use Apache::lonlocal;
89:
90: my $readit;
91:
92: # --------------------------------------------------------------------- Logging
93:
94: sub logtouch {
95: my $execdir=$perlvar{'lonDaemons'};
96: unless (-e "$execdir/logs/lonnet.log") {
97: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
98: close $fh;
99: }
100: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
101: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
102: }
103:
104: sub logthis {
105: my $message=shift;
106: my $execdir=$perlvar{'lonDaemons'};
107: my $now=time;
108: my $local=localtime($now);
109: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
110: print $fh "$local ($$): $message\n";
111: return 1;
112: }
113:
114: sub logperm {
115: my $message=shift;
116: my $execdir=$perlvar{'lonDaemons'};
117: my $now=time;
118: my $local=localtime($now);
119: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
120: print $fh "$now:$message:$local\n";
121: return 1;
122: }
123:
124: # -------------------------------------------------- Non-critical communication
125: sub subreply {
126: my ($cmd,$server)=@_;
127: my $peerfile="$perlvar{'lonSockDir'}/$server";
128: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
129: Type => SOCK_STREAM,
130: Timeout => 10)
131: or return "con_lost";
132: print $client "$cmd\n";
133: my $answer=<$client>;
134: if (!$answer) { $answer="con_lost"; }
135: chomp($answer);
136: return $answer;
137: }
138:
139: sub reply {
140: my ($cmd,$server)=@_;
141: unless (defined($hostname{$server})) { return 'no_such_host'; }
142: my $answer=subreply($cmd,$server);
143: if ($answer eq 'con_lost') {
144: #sleep 5;
145: #$answer=subreply($cmd,$server);
146: #if ($answer eq 'con_lost') {
147: # &logthis("Second attempt con_lost on $server");
148: # my $peerfile="$perlvar{'lonSockDir'}/$server";
149: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
150: # Type => SOCK_STREAM,
151: # Timeout => 10)
152: # or return "con_lost";
153: # &logthis("Killing socket");
154: # print $client "close_connection_exit\n";
155: #sleep 5;
156: # $answer=subreply($cmd,$server);
157: #}
158: }
159: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
160: &logthis("<font color=blue>WARNING:".
161: " $cmd to $server returned $answer</font>");
162: }
163: return $answer;
164: }
165:
166: # ----------------------------------------------------------- Send USR1 to lonc
167:
168: sub reconlonc {
169: my $peerfile=shift;
170: &logthis("Trying to reconnect for $peerfile");
171: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
172: if (my $fh=Apache::File->new("$loncfile")) {
173: my $loncpid=<$fh>;
174: chomp($loncpid);
175: if (kill 0 => $loncpid) {
176: &logthis("lonc at pid $loncpid responding, sending USR1");
177: kill USR1 => $loncpid;
178: sleep 1;
179: if (-e "$peerfile") { return; }
180: &logthis("$peerfile still not there, give it another try");
181: sleep 5;
182: if (-e "$peerfile") { return; }
183: &logthis(
184: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
185: } else {
186: &logthis(
187: "<font color=blue>WARNING:".
188: " lonc at pid $loncpid not responding, giving up</font>");
189: }
190: } else {
191: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
192: }
193: }
194:
195: # ------------------------------------------------------ Critical communication
196:
197: sub critical {
198: my ($cmd,$server)=@_;
199: unless ($hostname{$server}) {
200: &logthis("<font color=blue>WARNING:".
201: " Critical message to unknown server ($server)</font>");
202: return 'no_such_host';
203: }
204: my $answer=reply($cmd,$server);
205: if ($answer eq 'con_lost') {
206: my $pingreply=reply('ping',$server);
207: &reconlonc("$perlvar{'lonSockDir'}/$server");
208: my $pongreply=reply('pong',$server);
209: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
210: $answer=reply($cmd,$server);
211: if ($answer eq 'con_lost') {
212: my $now=time;
213: my $middlename=$cmd;
214: $middlename=substr($middlename,0,16);
215: $middlename=~s/\W//g;
216: my $dfilename=
217: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
218: $dumpcount++;
219: {
220: my $dfh;
221: if ($dfh=Apache::File->new(">$dfilename")) {
222: print $dfh "$cmd\n";
223: }
224: }
225: sleep 2;
226: my $wcmd='';
227: {
228: my $dfh;
229: if ($dfh=Apache::File->new("$dfilename")) {
230: $wcmd=<$dfh>;
231: }
232: }
233: chomp($wcmd);
234: if ($wcmd eq $cmd) {
235: &logthis("<font color=blue>WARNING: ".
236: "Connection buffer $dfilename: $cmd</font>");
237: &logperm("D:$server:$cmd");
238: return 'con_delayed';
239: } else {
240: &logthis("<font color=red>CRITICAL:"
241: ." Critical connection failed: $server $cmd</font>");
242: &logperm("F:$server:$cmd");
243: return 'con_failed';
244: }
245: }
246: }
247: return $answer;
248: }
249:
250: #
251: # -------------- Remove all key from the env that start witha lowercase letter
252: # (Which is always a lon-capa value)
253:
254: sub cleanenv {
255: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
256: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
257: foreach my $key (keys(%ENV)) {
258: if ($key =~ /^[a-z]/) {
259: delete($ENV{$key});
260: }
261: }
262: }
263:
264: # ------------------------------------------- Transfer profile into environment
265:
266: sub transfer_profile_to_env {
267: my ($lonidsdir,$handle)=@_;
268: my @profile;
269: {
270: my $idf=Apache::File->new("$lonidsdir/$handle.id");
271: flock($idf,LOCK_SH);
272: @profile=<$idf>;
273: $idf->close();
274: }
275: my $envi;
276: for ($envi=0;$envi<=$#profile;$envi++) {
277: chomp($profile[$envi]);
278: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
279: $ENV{$envname} = $envvalue;
280: }
281: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
282: }
283:
284: # ---------------------------------------------------------- Append Environment
285:
286: sub appenv {
287: my %newenv=@_;
288: foreach (keys %newenv) {
289: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
290: &logthis("<font color=blue>WARNING: ".
291: "Attempt to modify environment ".$_." to ".$newenv{$_}
292: .'</font>');
293: delete($newenv{$_});
294: } else {
295: $ENV{$_}=$newenv{$_};
296: }
297: }
298:
299: my $lockfh;
300: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
301: return 'error: '.$!;
302: }
303: unless (flock($lockfh,LOCK_EX)) {
304: &logthis("<font color=blue>WARNING: ".
305: 'Could not obtain exclusive lock in appenv: '.$!);
306: $lockfh->close();
307: return 'error: '.$!;
308: }
309:
310: my @oldenv;
311: {
312: my $fh;
313: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
314: return 'error: '.$!;
315: }
316: @oldenv=<$fh>;
317: $fh->close();
318: }
319: for (my $i=0; $i<=$#oldenv; $i++) {
320: chomp($oldenv[$i]);
321: if ($oldenv[$i] ne '') {
322: my ($name,$value)=split(/=/,$oldenv[$i]);
323: unless (defined($newenv{$name})) {
324: $newenv{$name}=$value;
325: }
326: }
327: }
328: {
329: my $fh;
330: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
331: return 'error';
332: }
333: my $newname;
334: foreach $newname (keys %newenv) {
335: print $fh "$newname=$newenv{$newname}\n";
336: }
337: $fh->close();
338: }
339:
340: $lockfh->close();
341: return 'ok';
342: }
343: # ----------------------------------------------------- Delete from Environment
344:
345: sub delenv {
346: my $delthis=shift;
347: my %newenv=();
348: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
349: &logthis("<font color=blue>WARNING: ".
350: "Attempt to delete from environment ".$delthis);
351: return 'error';
352: }
353: my @oldenv;
354: {
355: my $fh;
356: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
357: return 'error';
358: }
359: unless (flock($fh,LOCK_SH)) {
360: &logthis("<font color=blue>WARNING: ".
361: 'Could not obtain shared lock in delenv: '.$!);
362: $fh->close();
363: return 'error: '.$!;
364: }
365: @oldenv=<$fh>;
366: $fh->close();
367: }
368: {
369: my $fh;
370: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
371: return 'error';
372: }
373: unless (flock($fh,LOCK_EX)) {
374: &logthis("<font color=blue>WARNING: ".
375: 'Could not obtain exclusive lock in delenv: '.$!);
376: $fh->close();
377: return 'error: '.$!;
378: }
379: foreach (@oldenv) {
380: unless ($_=~/^$delthis/) { print $fh $_; }
381: }
382: $fh->close();
383: }
384: return 'ok';
385: }
386:
387: # ------------------------------------------ Find out current server userload
388: # there is a copy in lond
389: sub userload {
390: my $numusers=0;
391: {
392: opendir(LONIDS,$perlvar{'lonIDsDir'});
393: my $filename;
394: my $curtime=time;
395: while ($filename=readdir(LONIDS)) {
396: if ($filename eq '.' || $filename eq '..') {next;}
397: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
398: if ($curtime-$mtime < 3600) { $numusers++; }
399: }
400: closedir(LONIDS);
401: }
402: my $userloadpercent=0;
403: my $maxuserload=$perlvar{'lonUserLoadLim'};
404: if ($maxuserload) {
405: $userloadpercent=100*$numusers/$maxuserload;
406: }
407: $userloadpercent=sprintf("%.2f",$userloadpercent);
408: return $userloadpercent;
409: }
410:
411: # ------------------------------------------ Fight off request when overloaded
412:
413: sub overloaderror {
414: my ($r,$checkserver)=@_;
415: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
416: my $loadavg;
417: if ($checkserver eq $perlvar{'lonHostID'}) {
418: my $loadfile=Apache::File->new('/proc/loadavg');
419: $loadavg=<$loadfile>;
420: $loadavg =~ s/\s.*//g;
421: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
422: } else {
423: $loadavg=&reply('load',$checkserver);
424: }
425: my $overload=$loadavg-100;
426: if ($overload>0) {
427: $r->err_headers_out->{'Retry-After'}=$overload;
428: $r->log_error('Overload of '.$overload.' on '.$checkserver);
429: return 413;
430: }
431: return '';
432: }
433:
434: # ------------------------------ Find server with least workload from spare.tab
435:
436: sub spareserver {
437: my ($loadpercent,$userloadpercent) = @_;
438: my $tryserver;
439: my $spareserver='';
440: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
441: my $lowestserver=$loadpercent > $userloadpercent?
442: $loadpercent : $userloadpercent;
443: foreach $tryserver (keys %spareid) {
444: my $loadans=reply('load',$tryserver);
445: my $userloadans=reply('userload',$tryserver);
446: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
447: next; #didn't get a number from the server
448: }
449: my $answer;
450: if ($loadans =~ /\d/) {
451: if ($userloadans =~ /\d/) {
452: #both are numbers, pick the bigger one
453: $answer=$loadans > $userloadans?
454: $loadans : $userloadans;
455: } else {
456: $answer = $loadans;
457: }
458: } else {
459: $answer = $userloadans;
460: }
461: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
462: $spareserver="http://$hostname{$tryserver}";
463: $lowestserver=$answer;
464: }
465: }
466: return $spareserver;
467: }
468:
469: # --------------------------------------------- Try to change a user's password
470:
471: sub changepass {
472: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
473: $currentpass = &escape($currentpass);
474: $newpass = &escape($newpass);
475: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
476: $server);
477: if (! $answer) {
478: &logthis("No reply on password change request to $server ".
479: "by $uname in domain $udom.");
480: } elsif ($answer =~ "^ok") {
481: &logthis("$uname in $udom successfully changed their password ".
482: "on $server.");
483: } elsif ($answer =~ "^pwchange_failure") {
484: &logthis("$uname in $udom was unable to change their password ".
485: "on $server. The action was blocked by either lcpasswd ".
486: "or pwchange");
487: } elsif ($answer =~ "^non_authorized") {
488: &logthis("$uname in $udom did not get their password correct when ".
489: "attempting to change it on $server.");
490: } elsif ($answer =~ "^auth_mode_error") {
491: &logthis("$uname in $udom attempted to change their password despite ".
492: "not being locally or internally authenticated on $server.");
493: } elsif ($answer =~ "^unknown_user") {
494: &logthis("$uname in $udom attempted to change their password ".
495: "on $server but were unable to because $server is not ".
496: "their home server.");
497: } elsif ($answer =~ "^refused") {
498: &logthis("$server refused to change $uname in $udom password because ".
499: "it was sent an unencrypted request to change the password.");
500: }
501: return $answer;
502: }
503:
504: # ----------------------- Try to determine user's current authentication scheme
505:
506: sub queryauthenticate {
507: my ($uname,$udom)=@_;
508: if (($perlvar{'lonRole'} eq 'library') &&
509: ($udom eq $perlvar{'lonDefDomain'})) {
510: my $answer=reply("encrypt:currentauth:$udom:$uname",
511: $perlvar{'lonHostID'});
512: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
513: if (length($answer)) {
514: return $answer;
515: }
516: else {
517: &logthis("User $uname at $udom lacks an authentication mechanism");
518: return 'no_host';
519: }
520: }
521: }
522:
523: my $tryserver;
524: foreach $tryserver (keys %libserv) {
525: if ($hostdom{$tryserver} eq $udom) {
526: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
527: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
528: if (length($answer)) {
529: return $answer;
530: }
531: else {
532: &logthis("User $uname at $udom lacks an authentication mechanism");
533: return 'no_host';
534: }
535: }
536: }
537: }
538: &logthis("User $uname at $udom lacks an authentication mechanism");
539: return 'no_host';
540: }
541:
542: # --------- Try to authenticate user from domain's lib servers (first this one)
543:
544: sub authenticate {
545: my ($uname,$upass,$udom)=@_;
546: $upass=escape($upass);
547: $uname=~s/\W//g;
548: if (($perlvar{'lonRole'} eq 'library') &&
549: ($udom eq $perlvar{'lonDefDomain'})) {
550: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
551: if ($answer =~ /authorized/) {
552: if ($answer eq 'authorized') {
553: &logthis("User $uname at $udom authorized by local server");
554: return $perlvar{'lonHostID'};
555: }
556: if ($answer eq 'non_authorized') {
557: &logthis("User $uname at $udom rejected by local server");
558: return 'no_host';
559: }
560: }
561: }
562:
563: my $tryserver;
564: foreach $tryserver (keys %libserv) {
565: if ($hostdom{$tryserver} eq $udom) {
566: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
567: if ($answer =~ /authorized/) {
568: if ($answer eq 'authorized') {
569: &logthis("User $uname at $udom authorized by $tryserver");
570: return $tryserver;
571: }
572: if ($answer eq 'non_authorized') {
573: &logthis("User $uname at $udom rejected by $tryserver");
574: return 'no_host';
575: }
576: }
577: }
578: }
579: &logthis("User $uname at $udom could not be authenticated");
580: return 'no_host';
581: }
582:
583: # ---------------------- Find the homebase for a user from domain's lib servers
584:
585: sub homeserver {
586: my ($uname,$udom,$ignoreBadCache)=@_;
587: my $index="$uname:$udom";
588: if ($homecache{$index}) {
589: return "$homecache{$index}";
590: }
591: my $tryserver;
592: foreach $tryserver (keys %libserv) {
593: next if ($ignoreBadCache ne 'true' &&
594: exists($badServerCache{$tryserver}));
595: if ($hostdom{$tryserver} eq $udom) {
596: my $answer=reply("home:$udom:$uname",$tryserver);
597: if ($answer eq 'found') {
598: $homecache{$index}=$tryserver;
599: return $tryserver;
600: } elsif ($answer eq 'no_host') {
601: $badServerCache{$tryserver}=1;
602: }
603: }
604: }
605: return 'no_host';
606: }
607:
608: # ------------------------------------- Find the usernames behind a list of IDs
609:
610: sub idget {
611: my ($udom,@ids)=@_;
612: my %returnhash=();
613:
614: my $tryserver;
615: foreach $tryserver (keys %libserv) {
616: if ($hostdom{$tryserver} eq $udom) {
617: my $idlist=join('&',@ids);
618: $idlist=~tr/A-Z/a-z/;
619: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
620: my @answer=();
621: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
622: @answer=split(/\&/,$reply);
623: } ;
624: my $i;
625: for ($i=0;$i<=$#ids;$i++) {
626: if ($answer[$i]) {
627: $returnhash{$ids[$i]}=$answer[$i];
628: }
629: }
630: }
631: }
632: return %returnhash;
633: }
634:
635: # ------------------------------------- Find the IDs behind a list of usernames
636:
637: sub idrget {
638: my ($udom,@unames)=@_;
639: my %returnhash=();
640: foreach (@unames) {
641: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
642: }
643: return %returnhash;
644: }
645:
646: # ------------------------------- Store away a list of names and associated IDs
647:
648: sub idput {
649: my ($udom,%ids)=@_;
650: my %servers=();
651: foreach (keys %ids) {
652: my $uhom=&homeserver($_,$udom);
653: if ($uhom ne 'no_host') {
654: my $id=&escape($ids{$_});
655: $id=~tr/A-Z/a-z/;
656: my $unam=&escape($_);
657: if ($servers{$uhom}) {
658: $servers{$uhom}.='&'.$id.'='.$unam;
659: } else {
660: $servers{$uhom}=$id.'='.$unam;
661: }
662: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
663: }
664: }
665: foreach (keys %servers) {
666: &critical('idput:'.$udom.':'.$servers{$_},$_);
667: }
668: }
669:
670: # --------------------------------------------------- Assign a key to a student
671:
672: sub assign_access_key {
673: #
674: # a valid key looks like uname:udom#comments
675: # comments are being appended
676: #
677: my ($ckey,$cdom,$cnum,$udom,$uname,$logentry)=@_;
678: $cdom=
679: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
680: $cnum=
681: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
682: $udom=$ENV{'user.name'} unless (defined($udom));
683: $uname=$ENV{'user.domain'} unless (defined($uname));
684: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
685: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
686: ($existing{$ckey}=~/^$uname\:$udom\#(.*)$/)) {
687: # assigned to this person
688: # - this should not happen,
689: # unless something went wrong
690: # the first time around
691: # ready to assign
692: $logentry=$1.'; '.$logentry;
693: if (&put('accesskey',{$ckey=>$uname.':'.$udom.'#'.$logentry},
694: $cdom,$cnum) eq 'ok') {
695: # key now belongs to user
696: my $envkey='key.'.$cdom.'_'.$cnum;
697: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
698: &appenv('environment.'.$envkey => $ckey);
699: return 'ok';
700: } else {
701: return
702: 'error: Count not permanently assign key, will need to be re-entered later.';
703: }
704: } else {
705: return 'error: Could not assign key, try again later.';
706: }
707: } elsif (!$existing{$ckey}) {
708: # the key does not exist
709: return 'error: The key does not exist';
710: } else {
711: # the key is somebody else's
712: return 'error: The key is already in use';
713: }
714: }
715:
716: # ------------------------------------------ put an additional comment on a key
717:
718: sub comment_access_key {
719: #
720: # a valid key looks like uname:udom#comments
721: # comments are being appended
722: #
723: my ($ckey,$cdom,$cnum,$logentry)=@_;
724: $cdom=
725: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
726: $cnum=
727: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
728: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
729: if ($existing{$ckey}) {
730: $existing{$ckey}.='; '.$logentry;
731: # ready to assign
732: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
733: $cdom,$cnum) eq 'ok') {
734: return 'ok';
735: } else {
736: return 'error: Count not store comment.';
737: }
738: } else {
739: # the key does not exist
740: return 'error: The key does not exist';
741: }
742: }
743:
744: # ------------------------------------------------------ Generate a set of keys
745:
746: sub generate_access_keys {
747: my ($number,$cdom,$cnum,$logentry)=@_;
748: $cdom=
749: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
750: $cnum=
751: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
752: unless (&allowed('mky',$cdom)) { return 0; }
753: unless (($cdom) && ($cnum)) { return 0; }
754: if ($number>10000) { return 0; }
755: sleep(2); # make sure don't get same seed twice
756: srand(time()^($$+($$<<15))); # from "Programming Perl"
757: my $total=0;
758: for (my $i=1;$i<=$number;$i++) {
759: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
760: sprintf("%lx",int(100000*rand)).'-'.
761: sprintf("%lx",int(100000*rand));
762: $newkey=~s/1/g/g; # folks mix up 1 and l
763: $newkey=~s/0/h/g; # and also 0 and O
764: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
765: if ($existing{$newkey}) {
766: $i--;
767: } else {
768: if (&put('accesskeys',
769: { $newkey => '# generated '.localtime().
770: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
771: '; '.$logentry },
772: $cdom,$cnum) eq 'ok') {
773: $total++;
774: }
775: }
776: }
777: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
778: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
779: return $total;
780: }
781:
782: # ------------------------------------------------------- Validate an accesskey
783:
784: sub validate_access_key {
785: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
786: $cdom=
787: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
788: $cnum=
789: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
790: $udom=$ENV{'user.name'} unless (defined($udom));
791: $uname=$ENV{'user.domain'} unless (defined($uname));
792: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
793: return ($existing{$ckey}=~/^$uname\:$udom\#/);
794: }
795:
796: # ------------------------------------- Find the section of student in a course
797:
798: sub getsection {
799: my ($udom,$unam,$courseid)=@_;
800: $courseid=~s/\_/\//g;
801: $courseid=~s/^(\w)/\/$1/;
802: my %Pending;
803: my %Expired;
804: #
805: # Each role can either have not started yet (pending), be active,
806: # or have expired.
807: #
808: # If there is an active role, we are done.
809: #
810: # If there is more than one role which has not started yet,
811: # choose the one which will start sooner
812: # If there is one role which has not started yet, return it.
813: #
814: # If there is more than one expired role, choose the one which ended last.
815: # If there is a role which has expired, return it.
816: #
817: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
818: &homeserver($unam,$udom)))) {
819: my ($key,$value)=split(/\=/,$_);
820: $key=&unescape($key);
821: next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
822: my $section=$1;
823: if ($key eq $courseid.'_st') { $section=''; }
824: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
825: my $now=time;
826: if (defined($end) && ($now > $end)) {
827: $Expired{$end}=$section;
828: next;
829: }
830: if (defined($start) && ($now < $start)) {
831: $Pending{$start}=$section;
832: next;
833: }
834: return $section;
835: }
836: #
837: # Presumedly there will be few matching roles from the above
838: # loop and the sorting time will be negligible.
839: if (scalar(keys(%Pending))) {
840: my ($time) = sort {$a <=> $b} keys(%Pending);
841: return $Pending{$time};
842: }
843: if (scalar(keys(%Expired))) {
844: my @sorted = sort {$a <=> $b} keys(%Expired);
845: my $time = pop(@sorted);
846: return $Expired{$time};
847: }
848: return '-1';
849: }
850:
851: sub devalidate_cache {
852: my ($cache,$id) = @_;
853: delete $$cache{$id.'.time'};
854: delete $$cache{$id};
855: }
856:
857: sub is_cached {
858: my ($cache,$id,$time) = @_;
859: if (!exists($$cache{$id.'.time'})) {
860: return (undef,undef);
861: } else {
862: if (time-$$cache{$id.'.time'}>$time) {
863: &devalidate_cache($cache,$id);
864: return (undef,undef);
865: }
866: }
867: return ($$cache{$id},1);
868: }
869:
870: sub do_cache {
871: my ($cache,$id,$value) = @_;
872: $$cache{$id.'.time'}=time;
873: # do_cache implictly return the set value
874: $$cache{$id}=$value;
875: }
876:
877: sub usection {
878: my ($udom,$unam,$courseid)=@_;
879: my $hashid="$udom:$unam:$courseid";
880:
881: my ($result,$cached)=&is_cached(\%usectioncache,$hashid,300);
882: if (defined($cached)) { return $result; }
883: $courseid=~s/\_/\//g;
884: $courseid=~s/^(\w)/\/$1/;
885: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
886: &homeserver($unam,$udom)))) {
887: my ($key,$value)=split(/\=/,$_);
888: $key=&unescape($key);
889: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
890: my $section=$1;
891: if ($key eq $courseid.'_st') { $section=''; }
892: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
893: my $now=time;
894: my $notactive=0;
895: if ($start) {
896: if ($now<$start) { $notactive=1; }
897: }
898: if ($end) {
899: if ($now>$end) { $notactive=1; }
900: }
901: unless ($notactive) {
902: return &do_cache(\%usectioncache,$hashid,$section);
903: }
904: }
905: }
906: return &do_cache(\%usectioncache,$hashid,'-1');
907: }
908:
909: # ------------------------------------- Read an entry from a user's environment
910:
911: sub userenvironment {
912: my ($udom,$unam,@what)=@_;
913: my %returnhash=();
914: my @answer=split(/\&/,
915: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
916: &homeserver($unam,$udom)));
917: my $i;
918: for ($i=0;$i<=$#what;$i++) {
919: $returnhash{$what[$i]}=&unescape($answer[$i]);
920: }
921: return %returnhash;
922: }
923:
924: # -------------------------------------------------------------------- New chat
925:
926: sub chatsend {
927: my ($newentry,$anon)=@_;
928: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
929: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
930: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
931: &reply('chatsend:'.$cdom.':'.$cnum.':'.
932: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
933: &escape($newentry)),$chome);
934: }
935:
936: # ------------------------------------------ Find current version of a resource
937:
938: sub getversion {
939: my $fname=&clutter(shift);
940: unless ($fname=~/^\/res\//) { return -1; }
941: return ¤tversion(&filelocation('',$fname));
942: }
943:
944: sub currentversion {
945: my $fname=shift;
946: my $author=$fname;
947: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
948: my ($udom,$uname)=split(/\//,$author);
949: my $home=homeserver($uname,$udom);
950: if ($home eq 'no_host') {
951: return -1;
952: }
953: my $answer=reply("currentversion:$fname",$home);
954: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
955: return -1;
956: }
957: return $answer;
958: }
959:
960: # ----------------------------- Subscribe to a resource, return URL if possible
961:
962: sub subscribe {
963: my $fname=shift;
964: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
965: my $author=$fname;
966: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
967: my ($udom,$uname)=split(/\//,$author);
968: my $home=homeserver($uname,$udom);
969: if ($home eq 'no_host') {
970: return 'not_found';
971: }
972: my $answer=reply("sub:$fname",$home);
973: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
974: $answer.=' by '.$home;
975: }
976: return $answer;
977: }
978:
979: # -------------------------------------------------------------- Replicate file
980:
981: sub repcopy {
982: my $filename=shift;
983: $filename=~s/\/+/\//g;
984: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
985: my $transname="$filename.in.transfer";
986: if ((-e $filename) || (-e $transname)) { return OK; }
987: my $remoteurl=subscribe($filename);
988: if ($remoteurl =~ /^con_lost by/) {
989: &logthis("Subscribe returned $remoteurl: $filename");
990: return HTTP_SERVICE_UNAVAILABLE;
991: } elsif ($remoteurl eq 'not_found') {
992: &logthis("Subscribe returned not_found: $filename");
993: return HTTP_NOT_FOUND;
994: } elsif ($remoteurl =~ /^rejected by/) {
995: &logthis("Subscribe returned $remoteurl: $filename");
996: return FORBIDDEN;
997: } elsif ($remoteurl eq 'directory') {
998: return OK;
999: } else {
1000: my $author=$filename;
1001: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1002: my ($udom,$uname)=split(/\//,$author);
1003: my $home=homeserver($uname,$udom);
1004: unless ($home eq $perlvar{'lonHostID'}) {
1005: my @parts=split(/\//,$filename);
1006: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1007: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1008: &logthis("Malconfiguration for replication: $filename");
1009: return HTTP_BAD_REQUEST;
1010: }
1011: my $count;
1012: for ($count=5;$count<$#parts;$count++) {
1013: $path.="/$parts[$count]";
1014: if ((-e $path)!=1) {
1015: mkdir($path,0777);
1016: }
1017: }
1018: my $ua=new LWP::UserAgent;
1019: my $request=new HTTP::Request('GET',"$remoteurl");
1020: my $response=$ua->request($request,$transname);
1021: if ($response->is_error()) {
1022: unlink($transname);
1023: my $message=$response->status_line;
1024: &logthis("<font color=blue>WARNING:"
1025: ." LWP get: $message: $filename</font>");
1026: return HTTP_SERVICE_UNAVAILABLE;
1027: } else {
1028: if ($remoteurl!~/\.meta$/) {
1029: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1030: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1031: if ($mresponse->is_error()) {
1032: unlink($filename.'.meta');
1033: &logthis(
1034: "<font color=yellow>INFO: No metadata: $filename</font>");
1035: }
1036: }
1037: rename($transname,$filename);
1038: return OK;
1039: }
1040: }
1041: }
1042: }
1043:
1044: # ------------------------------------------------ Get server side include body
1045: sub ssi_body {
1046: my ($filelink,%form)=@_;
1047: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1048: &ssi($filelink,%form));
1049: $output=~s/^.*\<body[^\>]*\>//si;
1050: $output=~s/\<\/body\s*\>.*$//si;
1051: $output=~
1052: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1053: return $output;
1054: }
1055:
1056: # --------------------------------------------------------- Server Side Include
1057:
1058: sub ssi {
1059:
1060: my ($fn,%form)=@_;
1061:
1062: my $ua=new LWP::UserAgent;
1063:
1064: my $request;
1065:
1066: if (%form) {
1067: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1068: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1069: } else {
1070: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1071: }
1072:
1073: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1074: my $response=$ua->request($request);
1075:
1076: return $response->content;
1077: }
1078:
1079: sub externalssi {
1080: my ($url)=@_;
1081: my $ua=new LWP::UserAgent;
1082: my $request=new HTTP::Request('GET',$url);
1083: my $response=$ua->request($request);
1084: return $response->content;
1085: }
1086:
1087: # ------- Add a token to a remote URI's query string to vouch for access rights
1088:
1089: sub tokenwrapper {
1090: my $uri=shift;
1091: $uri=~s/^http\:\/\/([^\/]+)//;
1092: $uri=~s/^\///;
1093: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
1094: my $token=$1;
1095: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
1096: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
1097: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
1098: (($uri=~/\?/)?'&':'?').'token='.$token.
1099: '&tokenissued='.$perlvar{'lonHostID'};
1100: } else {
1101: return '/adm/notfound.html';
1102: }
1103: }
1104:
1105: # --------------- Take an uploaded file and put it into the userfiles directory
1106: # input: name of form element, coursedoc=1 means this is for the course
1107: # output: url of file in userspace
1108:
1109: sub userfileupload {
1110: my ($formname,$coursedoc)=@_;
1111: my $fname=$ENV{'form.'.$formname.'.filename'};
1112: # Replace Windows backslashes by forward slashes
1113: $fname=~s/\\/\//g;
1114: # Get rid of everything but the actual filename
1115: $fname=~s/^.*\/([^\/]+)$/$1/;
1116: # Replace spaces by underscores
1117: $fname=~s/\s+/\_/g;
1118: # Replace all other weird characters by nothing
1119: $fname=~s/[^\w\.\-]//g;
1120: # See if there is anything left
1121: unless ($fname) { return 'error: no uploaded file'; }
1122: chop($ENV{'form.'.$formname});
1123: # Create the directory if not present
1124: my $docuname='';
1125: my $docudom='';
1126: my $docuhome='';
1127: if ($coursedoc) {
1128: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1129: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1130: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1131: } else {
1132: $docuname=$ENV{'user.name'};
1133: $docudom=$ENV{'user.domain'};
1134: $docuhome=$ENV{'user.home'};
1135: }
1136: return
1137: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1138: }
1139:
1140: sub finishuserfileupload {
1141: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1142: my $path=$docudom.'/'.$docuname.'/';
1143: my $filepath=$perlvar{'lonDocRoot'};
1144: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1145: my $count;
1146: for ($count=4;$count<=$#parts;$count++) {
1147: $filepath.="/$parts[$count]";
1148: if ((-e $filepath)!=1) {
1149: mkdir($filepath,0777);
1150: }
1151: }
1152: # Save the file
1153: {
1154: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
1155: print $fh $ENV{'form.'.$formname};
1156: }
1157: # Notify homeserver to grep it
1158: #
1159:
1160: my $fetchresult=
1161: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
1162: if ($fetchresult eq 'ok') {
1163: #
1164: # Return the URL to it
1165: return '/uploaded/'.$path.$fname;
1166: } else {
1167: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1168: ' to host '.$docuhome.': '.$fetchresult);
1169: return '/adm/notfound.html';
1170: }
1171: }
1172:
1173: # ------------------------------------------------------------------------- Log
1174:
1175: sub log {
1176: my ($dom,$nam,$hom,$what)=@_;
1177: return critical("log:$dom:$nam:$what",$hom);
1178: }
1179:
1180: # ------------------------------------------------------------------ Course Log
1181: #
1182: # This routine flushes several buffers of non-mission-critical nature
1183: #
1184:
1185: sub flushcourselogs {
1186: &logthis('Flushing log buffers');
1187: #
1188: # course logs
1189: # This is a log of all transactions in a course, which can be used
1190: # for data mining purposes
1191: #
1192: # It also collects the courseid database, which lists last transaction
1193: # times and course titles for all courseids
1194: #
1195: my %courseidbuffer=();
1196: foreach (keys %courselogs) {
1197: my $crsid=$_;
1198: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1199: &escape($courselogs{$crsid}),
1200: $coursehombuf{$crsid}) eq 'ok') {
1201: delete $courselogs{$crsid};
1202: } else {
1203: &logthis('Failed to flush log buffer for '.$crsid);
1204: if (length($courselogs{$crsid})>40000) {
1205: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1206: " exceeded maximum size, deleting.</font>");
1207: delete $courselogs{$crsid};
1208: }
1209: }
1210: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1211: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1212: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1213: } else {
1214: $courseidbuffer{$coursehombuf{$crsid}}=
1215: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1216: }
1217: }
1218: #
1219: # Write course id database (reverse lookup) to homeserver of courses
1220: # Is used in pickcourse
1221: #
1222: foreach (keys %courseidbuffer) {
1223: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1224: }
1225: #
1226: # File accesses
1227: # Writes to the dynamic metadata of resources to get hit counts, etc.
1228: #
1229: foreach (keys %accesshash) {
1230: my $entry=$_;
1231: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
1232: my %temphash=($entry => $accesshash{$entry});
1233: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
1234: delete $accesshash{$entry};
1235: }
1236: }
1237: #
1238: # Roles
1239: # Reverse lookup of user roles for course faculty/staff and co-authorship
1240: #
1241: foreach (keys %userrolehash) {
1242: my $entry=$_;
1243: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1244: split(/\:/,$entry);
1245: if (&Apache::lonnet::put('nohist_userroles',
1246: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1247: $rudom,$runame) eq 'ok') {
1248: delete $userrolehash{$entry};
1249: }
1250: }
1251: $dumpcount++;
1252: }
1253:
1254: sub courselog {
1255: my $what=shift;
1256: $what=time.':'.$what;
1257: unless ($ENV{'request.course.id'}) { return ''; }
1258: $coursedombuf{$ENV{'request.course.id'}}=
1259: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1260: $coursenumbuf{$ENV{'request.course.id'}}=
1261: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1262: $coursehombuf{$ENV{'request.course.id'}}=
1263: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1264: $coursedescrbuf{$ENV{'request.course.id'}}=
1265: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1266: if (defined $courselogs{$ENV{'request.course.id'}}) {
1267: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1268: } else {
1269: $courselogs{$ENV{'request.course.id'}}.=$what;
1270: }
1271: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1272: &flushcourselogs();
1273: }
1274: }
1275:
1276: sub courseacclog {
1277: my $fnsymb=shift;
1278: unless ($ENV{'request.course.id'}) { return ''; }
1279: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1280: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1281: $what.=':POST';
1282: foreach (keys %ENV) {
1283: if ($_=~/^form\.(.*)/) {
1284: $what.=':'.$1.'='.$ENV{$_};
1285: }
1286: }
1287: }
1288: &courselog($what);
1289: }
1290:
1291: sub countacc {
1292: my $url=&declutter(shift);
1293: unless ($ENV{'request.course.id'}) { return ''; }
1294: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1295: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1296: if (defined($accesshash{$key})) {
1297: $accesshash{$key}++;
1298: } else {
1299: $accesshash{$key}=1;
1300: }
1301: }
1302:
1303: sub linklog {
1304: my ($from,$to)=@_;
1305: $from=&declutter($from);
1306: $to=&declutter($to);
1307: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1308: $accesshash{$to.'___'.$from.'___goto'}=1;
1309: }
1310:
1311: sub userrolelog {
1312: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1313: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1314: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1315: ($trole=~/^cr/)) {
1316: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1317: $userrolehash
1318: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1319: =$tend.':'.$tstart;
1320: }
1321: }
1322:
1323: sub get_course_adv_roles {
1324: my $cid=shift;
1325: $cid=$ENV{'request.course.id'} unless (defined($cid));
1326: my %coursehash=&coursedescription($cid);
1327: my %returnhash=();
1328: my %dumphash=
1329: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1330: my $now=time;
1331: foreach (keys %dumphash) {
1332: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1333: if (($tstart) && ($tstart<0)) { next; }
1334: if (($tend) && ($tend<$now)) { next; }
1335: if (($tstart) && ($now<$tstart)) { next; }
1336: my ($role,$username,$domain,$section)=split(/\:/,$_);
1337: my $key=&plaintext($role);
1338: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1339: if ($returnhash{$key}) {
1340: $returnhash{$key}.=','.$username.':'.$domain;
1341: } else {
1342: $returnhash{$key}=$username.':'.$domain;
1343: }
1344: }
1345: return %returnhash;
1346: }
1347:
1348: sub get_my_roles {
1349: my ($uname,$udom)=@_;
1350: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1351: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1352: my %dumphash=
1353: &dump('nohist_userroles',$udom,$uname);
1354: my %returnhash=();
1355: my $now=time;
1356: foreach (keys %dumphash) {
1357: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1358: if (($tstart) && ($tstart<0)) { next; }
1359: if (($tend) && ($tend<$now)) { next; }
1360: if (($tstart) && ($now<$tstart)) { next; }
1361: my ($role,$username,$domain,$section)=split(/\:/,$_);
1362: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1363: }
1364: return %returnhash;
1365: }
1366:
1367: # ----------------------------------------------------- Frontpage Announcements
1368: #
1369: #
1370:
1371: sub postannounce {
1372: my ($server,$text)=@_;
1373: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1374: unless ($text=~/\w/) { $text=''; }
1375: return &reply('setannounce:'.&escape($text),$server);
1376: }
1377:
1378: sub getannounce {
1379: if (my $fh=Apache::File->new($perlvar{'lonDocRoot'}.'/announcement.txt')) {
1380: my $announcement='';
1381: while (<$fh>) { $announcement .=$_; }
1382: $fh->close();
1383: if ($announcement=~/\w/) {
1384: return
1385: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1386: '<tr><td bgcolor="#FFFFFF"><pre>'.$announcement.'</pre></td></tr></table>';
1387: } else {
1388: return '';
1389: }
1390: } else {
1391: return '';
1392: }
1393: }
1394:
1395: # ---------------------------------------------------------- Course ID routines
1396: # Deal with domain's nohist_courseid.db files
1397: #
1398:
1399: sub courseidput {
1400: my ($domain,$what,$coursehome)=@_;
1401: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1402: }
1403:
1404: sub courseiddump {
1405: my ($domfilter,$descfilter,$sincefilter)=@_;
1406: my %returnhash=();
1407: unless ($domfilter) { $domfilter=''; }
1408: foreach my $tryserver (keys %libserv) {
1409: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1410: foreach (
1411: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1412: $sincefilter.':'.&escape($descfilter),
1413: $tryserver))) {
1414: my ($key,$value)=split(/\=/,$_);
1415: if (($key) && ($value)) {
1416: $returnhash{&unescape($key)}=&unescape($value);
1417: }
1418: }
1419:
1420: }
1421: }
1422: return %returnhash;
1423: }
1424:
1425: #
1426: # ----------------------------------------------------------- Check out an item
1427:
1428: sub checkout {
1429: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1430: my $now=time;
1431: my $lonhost=$perlvar{'lonHostID'};
1432: my $infostr=&escape(
1433: 'CHECKOUTTOKEN&'.
1434: $tuname.'&'.
1435: $tudom.'&'.
1436: $tcrsid.'&'.
1437: $symb.'&'.
1438: $now.'&'.$ENV{'REMOTE_ADDR'});
1439: my $token=&reply('tmpput:'.$infostr,$lonhost);
1440: if ($token=~/^error\:/) {
1441: &logthis("<font color=blue>WARNING: ".
1442: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1443: "</font>");
1444: return '';
1445: }
1446:
1447: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1448: $token=~tr/a-z/A-Z/;
1449:
1450: my %infohash=('resource.0.outtoken' => $token,
1451: 'resource.0.checkouttime' => $now,
1452: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1453:
1454: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1455: return '';
1456: } else {
1457: &logthis("<font color=blue>WARNING: ".
1458: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1459: "</font>");
1460: }
1461:
1462: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1463: &escape('Checkout '.$infostr.' - '.
1464: $token)) ne 'ok') {
1465: return '';
1466: } else {
1467: &logthis("<font color=blue>WARNING: ".
1468: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1469: "</font>");
1470: }
1471: return $token;
1472: }
1473:
1474: # ------------------------------------------------------------ Check in an item
1475:
1476: sub checkin {
1477: my $token=shift;
1478: my $now=time;
1479: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1480: $lonhost=~tr/A-Z/a-z/;
1481: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1482: $dtoken=~s/\W/\_/g;
1483: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1484: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1485:
1486: unless (($tuname) && ($tudom)) {
1487: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1488: return '';
1489: }
1490:
1491: unless (&allowed('mgr',$tcrsid)) {
1492: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1493: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1494: return '';
1495: }
1496:
1497: my %infohash=('resource.0.intoken' => $token,
1498: 'resource.0.checkintime' => $now,
1499: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1500:
1501: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1502: return '';
1503: }
1504:
1505: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1506: &escape('Checkin - '.$token)) ne 'ok') {
1507: return '';
1508: }
1509:
1510: return ($symb,$tuname,$tudom,$tcrsid);
1511: }
1512:
1513: # --------------------------------------------- Set Expire Date for Spreadsheet
1514:
1515: sub expirespread {
1516: my ($uname,$udom,$stype,$usymb)=@_;
1517: my $cid=$ENV{'request.course.id'};
1518: if ($cid) {
1519: my $now=time;
1520: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1521: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1522: $ENV{'course.'.$cid.'.num'}.
1523: ':nohist_expirationdates:'.
1524: &escape($key).'='.$now,
1525: $ENV{'course.'.$cid.'.home'})
1526: }
1527: return 'ok';
1528: }
1529:
1530: # ----------------------------------------------------- Devalidate Spreadsheets
1531:
1532: sub devalidate {
1533: my ($symb,$uname,$udom)=@_;
1534: my $cid=$ENV{'request.course.id'};
1535: if ($cid) {
1536: # delete the stored spreadsheets for
1537: # - the student level sheet of this user in course's homespace
1538: # - the assessment level sheet for this resource
1539: # for this user in user's homespace
1540: my $key=$uname.':'.$udom.':';
1541: my $status=
1542: &del('nohist_calculatedsheets',
1543: [$key.'studentcalc:'],
1544: $ENV{'course.'.$cid.'.domain'},
1545: $ENV{'course.'.$cid.'.num'})
1546: .' '.
1547: &del('nohist_calculatedsheets_'.$cid,
1548: [$key.'assesscalc:'.$symb],$udom,$uname);
1549: unless ($status eq 'ok ok') {
1550: &logthis('Could not devalidate spreadsheet '.
1551: $uname.' at '.$udom.' for '.
1552: $symb.': '.$status);
1553: }
1554: }
1555: }
1556:
1557: sub get_scalar {
1558: my ($string,$end) = @_;
1559: my $value;
1560: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1561: $value = $1;
1562: } elsif ($$string =~ s/^([^&]*?)&//) {
1563: $value = $1;
1564: }
1565: return &unescape($value);
1566: }
1567:
1568: sub array2str {
1569: my (@array) = @_;
1570: my $result=&arrayref2str(\@array);
1571: $result=~s/^__ARRAY_REF__//;
1572: $result=~s/__END_ARRAY_REF__$//;
1573: return $result;
1574: }
1575:
1576: sub arrayref2str {
1577: my ($arrayref) = @_;
1578: my $result='__ARRAY_REF__';
1579: foreach my $elem (@$arrayref) {
1580: if(ref($elem) eq 'ARRAY') {
1581: $result.=&arrayref2str($elem).'&';
1582: } elsif(ref($elem) eq 'HASH') {
1583: $result.=&hashref2str($elem).'&';
1584: } elsif(ref($elem)) {
1585: #print("Got a ref of ".(ref($elem))." skipping.");
1586: } else {
1587: $result.=&escape($elem).'&';
1588: }
1589: }
1590: $result=~s/\&$//;
1591: $result .= '__END_ARRAY_REF__';
1592: return $result;
1593: }
1594:
1595: sub hash2str {
1596: my (%hash) = @_;
1597: my $result=&hashref2str(\%hash);
1598: $result=~s/^__HASH_REF__//;
1599: $result=~s/__END_HASH_REF__$//;
1600: return $result;
1601: }
1602:
1603: sub hashref2str {
1604: my ($hashref)=@_;
1605: my $result='__HASH_REF__';
1606: foreach (keys(%$hashref)) {
1607: if (ref($_) eq 'ARRAY') {
1608: $result.=&arrayref2str($_).'=';
1609: } elsif (ref($_) eq 'HASH') {
1610: $result.=&hashref2str($_).'=';
1611: } elsif (ref($_)) {
1612: $result.='=';
1613: #print("Got a ref of ".(ref($_))." skipping.");
1614: } else {
1615: if ($_) {$result.=&escape($_).'=';} else { last; }
1616: }
1617:
1618: if(ref($hashref->{$_}) eq 'ARRAY') {
1619: $result.=&arrayref2str($hashref->{$_}).'&';
1620: } elsif(ref($hashref->{$_}) eq 'HASH') {
1621: $result.=&hashref2str($hashref->{$_}).'&';
1622: } elsif(ref($hashref->{$_})) {
1623: $result.='&';
1624: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1625: } else {
1626: $result.=&escape($hashref->{$_}).'&';
1627: }
1628: }
1629: $result=~s/\&$//;
1630: $result .= '__END_HASH_REF__';
1631: return $result;
1632: }
1633:
1634: sub str2hash {
1635: my ($string)=@_;
1636: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1637: return %$hash;
1638: }
1639:
1640: sub str2hashref {
1641: my ($string) = @_;
1642:
1643: my %hash;
1644:
1645: if($string !~ /^__HASH_REF__/) {
1646: if (! ($string eq '' || !defined($string))) {
1647: $hash{'error'}='Not hash reference';
1648: }
1649: return (\%hash, $string);
1650: }
1651:
1652: $string =~ s/^__HASH_REF__//;
1653:
1654: while($string !~ /^__END_HASH_REF__/) {
1655: #key
1656: my $key='';
1657: if($string =~ /^__HASH_REF__/) {
1658: ($key, $string)=&str2hashref($string);
1659: if(defined($key->{'error'})) {
1660: $hash{'error'}='Bad data';
1661: return (\%hash, $string);
1662: }
1663: } elsif($string =~ /^__ARRAY_REF__/) {
1664: ($key, $string)=&str2arrayref($string);
1665: if($key->[0] eq 'Array reference error') {
1666: $hash{'error'}='Bad data';
1667: return (\%hash, $string);
1668: }
1669: } else {
1670: $string =~ s/^(.*?)=//;
1671: $key=&unescape($1);
1672: }
1673: $string =~ s/^=//;
1674:
1675: #value
1676: my $value='';
1677: if($string =~ /^__HASH_REF__/) {
1678: ($value, $string)=&str2hashref($string);
1679: if(defined($value->{'error'})) {
1680: $hash{'error'}='Bad data';
1681: return (\%hash, $string);
1682: }
1683: } elsif($string =~ /^__ARRAY_REF__/) {
1684: ($value, $string)=&str2arrayref($string);
1685: if($value->[0] eq 'Array reference error') {
1686: $hash{'error'}='Bad data';
1687: return (\%hash, $string);
1688: }
1689: } else {
1690: $value=&get_scalar(\$string,'__END_HASH_REF__');
1691: }
1692: $string =~ s/^&//;
1693:
1694: $hash{$key}=$value;
1695: }
1696:
1697: $string =~ s/^__END_HASH_REF__//;
1698:
1699: return (\%hash, $string);
1700: }
1701:
1702: sub str2array {
1703: my ($string)=@_;
1704: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1705: return @$array;
1706: }
1707:
1708: sub str2arrayref {
1709: my ($string) = @_;
1710: my @array;
1711:
1712: if($string !~ /^__ARRAY_REF__/) {
1713: if (! ($string eq '' || !defined($string))) {
1714: $array[0]='Array reference error';
1715: }
1716: return (\@array, $string);
1717: }
1718:
1719: $string =~ s/^__ARRAY_REF__//;
1720:
1721: while($string !~ /^__END_ARRAY_REF__/) {
1722: my $value='';
1723: if($string =~ /^__HASH_REF__/) {
1724: ($value, $string)=&str2hashref($string);
1725: if(defined($value->{'error'})) {
1726: $array[0] ='Array reference error';
1727: return (\@array, $string);
1728: }
1729: } elsif($string =~ /^__ARRAY_REF__/) {
1730: ($value, $string)=&str2arrayref($string);
1731: if($value->[0] eq 'Array reference error') {
1732: $array[0] ='Array reference error';
1733: return (\@array, $string);
1734: }
1735: } else {
1736: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1737: }
1738: $string =~ s/^&//;
1739:
1740: push(@array, $value);
1741: }
1742:
1743: $string =~ s/^__END_ARRAY_REF__//;
1744:
1745: return (\@array, $string);
1746: }
1747:
1748: # -------------------------------------------------------------------Temp Store
1749:
1750: sub tmpreset {
1751: my ($symb,$namespace,$domain,$stuname) = @_;
1752: if (!$symb) {
1753: $symb=&symbread();
1754: if (!$symb) { $symb= $ENV{'request.url'}; }
1755: }
1756: $symb=escape($symb);
1757:
1758: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1759: $namespace=~s/\//\_/g;
1760: $namespace=~s/\W//g;
1761:
1762: #FIXME needs to do something for /pub resources
1763: if (!$domain) { $domain=$ENV{'user.domain'}; }
1764: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1765: my $path=$perlvar{'lonDaemons'}.'/tmp';
1766: my %hash;
1767: if (tie(%hash,'GDBM_File',
1768: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1769: &GDBM_WRCREAT(),0640)) {
1770: foreach my $key (keys %hash) {
1771: if ($key=~ /:$symb/) {
1772: delete($hash{$key});
1773: }
1774: }
1775: }
1776: }
1777:
1778: sub tmpstore {
1779: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1780:
1781: if (!$symb) {
1782: $symb=&symbread();
1783: if (!$symb) { $symb= $ENV{'request.url'}; }
1784: }
1785: $symb=escape($symb);
1786:
1787: if (!$namespace) {
1788: # I don't think we would ever want to store this for a course.
1789: # it seems this will only be used if we don't have a course.
1790: #$namespace=$ENV{'request.course.id'};
1791: #if (!$namespace) {
1792: $namespace=$ENV{'request.state'};
1793: #}
1794: }
1795: $namespace=~s/\//\_/g;
1796: $namespace=~s/\W//g;
1797: #FIXME needs to do something for /pub resources
1798: if (!$domain) { $domain=$ENV{'user.domain'}; }
1799: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1800: my $now=time;
1801: my %hash;
1802: my $path=$perlvar{'lonDaemons'}.'/tmp';
1803: if (tie(%hash,'GDBM_File',
1804: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1805: &GDBM_WRCREAT(),0640)) {
1806: $hash{"version:$symb"}++;
1807: my $version=$hash{"version:$symb"};
1808: my $allkeys='';
1809: foreach my $key (keys(%$storehash)) {
1810: $allkeys.=$key.':';
1811: $hash{"$version:$symb:$key"}=$$storehash{$key};
1812: }
1813: $hash{"$version:$symb:timestamp"}=$now;
1814: $allkeys.='timestamp';
1815: $hash{"$version:keys:$symb"}=$allkeys;
1816: if (untie(%hash)) {
1817: return 'ok';
1818: } else {
1819: return "error:$!";
1820: }
1821: } else {
1822: return "error:$!";
1823: }
1824: }
1825:
1826: # -----------------------------------------------------------------Temp Restore
1827:
1828: sub tmprestore {
1829: my ($symb,$namespace,$domain,$stuname) = @_;
1830:
1831: if (!$symb) {
1832: $symb=&symbread();
1833: if (!$symb) { $symb= $ENV{'request.url'}; }
1834: }
1835: $symb=escape($symb);
1836:
1837: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1838: #FIXME needs to do something for /pub resources
1839: if (!$domain) { $domain=$ENV{'user.domain'}; }
1840: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1841:
1842: my %returnhash;
1843: $namespace=~s/\//\_/g;
1844: $namespace=~s/\W//g;
1845: my %hash;
1846: my $path=$perlvar{'lonDaemons'}.'/tmp';
1847: if (tie(%hash,'GDBM_File',
1848: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1849: &GDBM_READER(),0640)) {
1850: my $version=$hash{"version:$symb"};
1851: $returnhash{'version'}=$version;
1852: my $scope;
1853: for ($scope=1;$scope<=$version;$scope++) {
1854: my $vkeys=$hash{"$scope:keys:$symb"};
1855: my @keys=split(/:/,$vkeys);
1856: my $key;
1857: $returnhash{"$scope:keys"}=$vkeys;
1858: foreach $key (@keys) {
1859: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1860: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1861: }
1862: }
1863: if (!(untie(%hash))) {
1864: return "error:$!";
1865: }
1866: } else {
1867: return "error:$!";
1868: }
1869: return %returnhash;
1870: }
1871:
1872: # ----------------------------------------------------------------------- Store
1873:
1874: sub store {
1875: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1876: my $home='';
1877:
1878: if ($stuname) { $home=&homeserver($stuname,$domain); }
1879:
1880: $symb=&symbclean($symb);
1881: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1882:
1883: if (!$domain) { $domain=$ENV{'user.domain'}; }
1884: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1885:
1886: &devalidate($symb,$stuname,$domain);
1887:
1888: $symb=escape($symb);
1889: if (!$namespace) {
1890: unless ($namespace=$ENV{'request.course.id'}) {
1891: return '';
1892: }
1893: }
1894: if (!$home) { $home=$ENV{'user.home'}; }
1895: my $namevalue='';
1896: foreach (keys %$storehash) {
1897: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1898: }
1899: $namevalue=~s/\&$//;
1900: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1901: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1902: }
1903:
1904: # -------------------------------------------------------------- Critical Store
1905:
1906: sub cstore {
1907: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1908: my $home='';
1909:
1910: if ($stuname) { $home=&homeserver($stuname,$domain); }
1911:
1912: $symb=&symbclean($symb);
1913: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1914:
1915: if (!$domain) { $domain=$ENV{'user.domain'}; }
1916: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1917:
1918: &devalidate($symb,$stuname,$domain);
1919:
1920: $symb=escape($symb);
1921: if (!$namespace) {
1922: unless ($namespace=$ENV{'request.course.id'}) {
1923: return '';
1924: }
1925: }
1926: if (!$home) { $home=$ENV{'user.home'}; }
1927:
1928: my $namevalue='';
1929: foreach (keys %$storehash) {
1930: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1931: }
1932: $namevalue=~s/\&$//;
1933: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1934: return critical
1935: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1936: }
1937:
1938: # --------------------------------------------------------------------- Restore
1939:
1940: sub restore {
1941: my ($symb,$namespace,$domain,$stuname) = @_;
1942: my $home='';
1943:
1944: if ($stuname) { $home=&homeserver($stuname,$domain); }
1945:
1946: if (!$symb) {
1947: unless ($symb=escape(&symbread())) { return ''; }
1948: } else {
1949: $symb=&escape(&symbclean($symb));
1950: }
1951: if (!$namespace) {
1952: unless ($namespace=$ENV{'request.course.id'}) {
1953: return '';
1954: }
1955: }
1956: if (!$domain) { $domain=$ENV{'user.domain'}; }
1957: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1958: if (!$home) { $home=$ENV{'user.home'}; }
1959: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1960:
1961: my %returnhash=();
1962: foreach (split(/\&/,$answer)) {
1963: my ($name,$value)=split(/\=/,$_);
1964: $returnhash{&unescape($name)}=&unescape($value);
1965: }
1966: my $version;
1967: for ($version=1;$version<=$returnhash{'version'};$version++) {
1968: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1969: $returnhash{$_}=$returnhash{$version.':'.$_};
1970: }
1971: }
1972: return %returnhash;
1973: }
1974:
1975: # ---------------------------------------------------------- Course Description
1976:
1977: sub coursedescription {
1978: my $courseid=shift;
1979: $courseid=~s/^\///;
1980: $courseid=~s/\_/\//g;
1981: my ($cdomain,$cnum)=split(/\//,$courseid);
1982: my $chome=&homeserver($cnum,$cdomain);
1983: my $normalid=$cdomain.'_'.$cnum;
1984: # need to always cache even if we get errors otherwise we keep
1985: # trying and trying and trying to get the course description.
1986: my %envhash=();
1987: my %returnhash=();
1988: $envhash{'course.'.$normalid.'.last_cache'}=time;
1989: if ($chome ne 'no_host') {
1990: %returnhash=&dump('environment',$cdomain,$cnum);
1991: if (!exists($returnhash{'con_lost'})) {
1992: $returnhash{'home'}= $chome;
1993: $returnhash{'domain'} = $cdomain;
1994: $returnhash{'num'} = $cnum;
1995: while (my ($name,$value) = each %returnhash) {
1996: $envhash{'course.'.$normalid.'.'.$name}=$value;
1997: }
1998: $returnhash{'url'}=&clutter($returnhash{'url'});
1999: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2000: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2001: $envhash{'course.'.$normalid.'.home'}=$chome;
2002: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2003: $envhash{'course.'.$normalid.'.num'}=$cnum;
2004: }
2005: }
2006: &appenv(%envhash);
2007: return %returnhash;
2008: }
2009:
2010: # -------------------------------------------------------- Get user privileges
2011:
2012: sub rolesinit {
2013: my ($domain,$username,$authhost)=@_;
2014: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2015: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2016: my %allroles=();
2017: my %thesepriv=();
2018: my $now=time;
2019: my $userroles="user.login.time=$now\n";
2020: my $thesestr;
2021:
2022: if ($rolesdump ne '') {
2023: foreach (split(/&/,$rolesdump)) {
2024: if ($_!~/^rolesdef\&/) {
2025: my ($area,$role)=split(/=/,$_);
2026: $area=~s/\_\w\w$//;
2027: my ($trole,$tend,$tstart)=split(/_/,$role);
2028: $userroles.='user.role.'.$trole.'.'.$area.'='.
2029: $tstart.'.'.$tend."\n";
2030: # log the associated role with the area
2031: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2032: if ($tend!=0) {
2033: if ($tend<$now) {
2034: $trole='';
2035: }
2036: }
2037: if ($tstart!=0) {
2038: if ($tstart>$now) {
2039: $trole='';
2040: }
2041: }
2042: if (($area ne '') && ($trole ne '')) {
2043: my $spec=$trole.'.'.$area;
2044: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2045: if ($trole =~ /^cr\//) {
2046: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2047: my $homsvr=homeserver($rauthor,$rdomain);
2048: if ($hostname{$homsvr} ne '') {
2049: my ($rdummy,$roledef)=
2050: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2051:
2052: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2053: my ($syspriv,$dompriv,$coursepriv)=
2054: split(/\_/,$roledef);
2055: if (defined($syspriv)) {
2056: $allroles{'cm./'}.=':'.$syspriv;
2057: $allroles{$spec.'./'}.=':'.$syspriv;
2058: }
2059: if ($tdomain ne '') {
2060: if (defined($dompriv)) {
2061: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2062: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2063: }
2064: if ($trest ne '') {
2065: if (defined($coursepriv)) {
2066: $allroles{'cm.'.$area}.=':'.$coursepriv;
2067: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
2068: }
2069: }
2070: }
2071: }
2072: }
2073: } else {
2074: if (defined($pr{$trole.':s'})) {
2075: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
2076: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2077: }
2078: if ($tdomain ne '') {
2079: if (defined($pr{$trole.':d'})) {
2080: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2081: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2082: }
2083: if ($trest ne '') {
2084: if (defined($pr{$trole.':c'})) {
2085: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2086: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2087: }
2088: }
2089: }
2090: }
2091: }
2092: }
2093: }
2094: my $adv=0;
2095: my $author=0;
2096: foreach (keys %allroles) {
2097: %thesepriv=();
2098: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
2099: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2100: foreach (split(/:/,$allroles{$_})) {
2101: if ($_ ne '') {
2102: my ($privilege,$restrictions)=split(/&/,$_);
2103: if ($restrictions eq '') {
2104: $thesepriv{$privilege}='F';
2105: } else {
2106: if ($thesepriv{$privilege} ne 'F') {
2107: $thesepriv{$privilege}.=$restrictions;
2108: }
2109: }
2110: }
2111: }
2112: $thesestr='';
2113: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2114: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
2115: }
2116: $userroles.='user.adv='.$adv."\n".
2117: 'user.author='.$author."\n";
2118: $ENV{'user.adv'}=$adv;
2119: }
2120: return $userroles;
2121: }
2122:
2123: # --------------------------------------------------------------- get interface
2124:
2125: sub get {
2126: my ($namespace,$storearr,$udomain,$uname)=@_;
2127: my $items='';
2128: foreach (@$storearr) {
2129: $items.=escape($_).'&';
2130: }
2131: $items=~s/\&$//;
2132: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2133: if (!$uname) { $uname=$ENV{'user.name'}; }
2134: my $uhome=&homeserver($uname,$udomain);
2135:
2136: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2137: my @pairs=split(/\&/,$rep);
2138: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2139: return @pairs;
2140: }
2141: my %returnhash=();
2142: my $i=0;
2143: foreach (@$storearr) {
2144: $returnhash{$_}=unescape($pairs[$i]);
2145: $i++;
2146: }
2147: return %returnhash;
2148: }
2149:
2150: # --------------------------------------------------------------- del interface
2151:
2152: sub del {
2153: my ($namespace,$storearr,$udomain,$uname)=@_;
2154: my $items='';
2155: foreach (@$storearr) {
2156: $items.=escape($_).'&';
2157: }
2158: $items=~s/\&$//;
2159: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2160: if (!$uname) { $uname=$ENV{'user.name'}; }
2161: my $uhome=&homeserver($uname,$udomain);
2162:
2163: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2164: }
2165:
2166: # -------------------------------------------------------------- dump interface
2167:
2168: sub dump {
2169: my ($namespace,$udomain,$uname,$regexp)=@_;
2170: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2171: if (!$uname) { $uname=$ENV{'user.name'}; }
2172: my $uhome=&homeserver($uname,$udomain);
2173: if ($regexp) {
2174: $regexp=&escape($regexp);
2175: } else {
2176: $regexp='.';
2177: }
2178: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2179: my @pairs=split(/\&/,$rep);
2180: my %returnhash=();
2181: foreach (@pairs) {
2182: my ($key,$value)=split(/=/,$_);
2183: $returnhash{unescape($key)}=unescape($value);
2184: }
2185: return %returnhash;
2186: }
2187:
2188: # -------------------------------------------------------------- keys interface
2189:
2190: sub getkeys {
2191: my ($namespace,$udomain,$uname)=@_;
2192: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2193: if (!$uname) { $uname=$ENV{'user.name'}; }
2194: my $uhome=&homeserver($uname,$udomain);
2195: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2196: my @keyarray=();
2197: foreach (split(/\&/,$rep)) {
2198: push (@keyarray,&unescape($_));
2199: }
2200: return @keyarray;
2201: }
2202:
2203: # --------------------------------------------------------------- currentdump
2204: sub currentdump {
2205: my ($courseid,$sdom,$sname)=@_;
2206: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2207: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2208: $sname = $ENV{'user.name'} if (! defined($sname));
2209: my $uhome = &homeserver($sname,$sdom);
2210: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2211: return if ($rep =~ /^(error:|no_such_host)/);
2212: #
2213: my %returnhash=();
2214: #
2215: if ($rep eq "unknown_cmd") {
2216: # an old lond will not know currentdump
2217: # Do a dump and make it look like a currentdump
2218: my @tmp = &dump($courseid,$sdom,$sname,'.');
2219: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2220: my %hash = @tmp;
2221: @tmp=();
2222: # Code ripped from lond, essentially. The only difference
2223: # here is the unescaping done by lonnet::dump(). Conceivably
2224: # we might run in to problems with parameter names =~ /^v\./
2225: while (my ($key,$value) = each(%hash)) {
2226: my ($v,$symb,$param) = split(/:/,$key);
2227: next if ($v eq 'version' || $symb eq 'keys');
2228: next if (exists($returnhash{$symb}) &&
2229: exists($returnhash{$symb}->{$param}) &&
2230: $returnhash{$symb}->{'v.'.$param} > $v);
2231: $returnhash{$symb}->{$param}=$value;
2232: $returnhash{$symb}->{'v.'.$param}=$v;
2233: }
2234: #
2235: # Remove all of the keys in the hashes which keep track of
2236: # the version of the parameter.
2237: while (my ($symb,$param_hash) = each(%returnhash)) {
2238: # use a foreach because we are going to delete from the hash.
2239: foreach my $key (keys(%$param_hash)) {
2240: delete($param_hash->{$key}) if ($key =~ /^v\./);
2241: }
2242: }
2243: } else {
2244: my @pairs=split(/\&/,$rep);
2245: foreach (@pairs) {
2246: my ($key,$value)=split(/=/,$_);
2247: my ($symb,$param) = split(/:/,$key);
2248: $returnhash{&unescape($symb)}->{&unescape($param)} =
2249: &unescape($value);
2250: }
2251: }
2252: return %returnhash;
2253: }
2254:
2255: # --------------------------------------------------------------- put interface
2256:
2257: sub put {
2258: my ($namespace,$storehash,$udomain,$uname)=@_;
2259: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2260: if (!$uname) { $uname=$ENV{'user.name'}; }
2261: my $uhome=&homeserver($uname,$udomain);
2262: my $items='';
2263: foreach (keys %$storehash) {
2264: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
2265: }
2266: $items=~s/\&$//;
2267: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2268: }
2269:
2270: # ------------------------------------------------------ critical put interface
2271:
2272: sub cput {
2273: my ($namespace,$storehash,$udomain,$uname)=@_;
2274: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2275: if (!$uname) { $uname=$ENV{'user.name'}; }
2276: my $uhome=&homeserver($uname,$udomain);
2277: my $items='';
2278: foreach (keys %$storehash) {
2279: $items.=escape($_).'='.escape($$storehash{$_}).'&';
2280: }
2281: $items=~s/\&$//;
2282: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2283: }
2284:
2285: # -------------------------------------------------------------- eget interface
2286:
2287: sub eget {
2288: my ($namespace,$storearr,$udomain,$uname)=@_;
2289: my $items='';
2290: foreach (@$storearr) {
2291: $items.=escape($_).'&';
2292: }
2293: $items=~s/\&$//;
2294: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2295: if (!$uname) { $uname=$ENV{'user.name'}; }
2296: my $uhome=&homeserver($uname,$udomain);
2297: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2298: my @pairs=split(/\&/,$rep);
2299: my %returnhash=();
2300: my $i=0;
2301: foreach (@$storearr) {
2302: $returnhash{$_}=unescape($pairs[$i]);
2303: $i++;
2304: }
2305: return %returnhash;
2306: }
2307:
2308: # ---------------------------------------------- Custom access rule evaluation
2309:
2310: sub customaccess {
2311: my ($priv,$uri)=@_;
2312: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2313: $urealm=~s/^\W//;
2314: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2315: my $access=0;
2316: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2317: my ($effect,$realm,$role)=split(/\:/,$_);
2318: if ($role) {
2319: if ($role ne $urole) { next; }
2320: }
2321: foreach (split(/\s*\,\s*/,$realm)) {
2322: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2323: if ($tdom) {
2324: if ($tdom ne $udom) { next; }
2325: }
2326: if ($tcrs) {
2327: if ($tcrs ne $ucrs) { next; }
2328: }
2329: if ($tsec) {
2330: if ($tsec ne $usec) { next; }
2331: }
2332: $access=($effect eq 'allow');
2333: last;
2334: }
2335: if ($realm eq '' && $role eq '') {
2336: $access=($effect eq 'allow');
2337: }
2338: }
2339: return $access;
2340: }
2341:
2342: # ------------------------------------------------- Check for a user privilege
2343:
2344: sub allowed {
2345: my ($priv,$uri)=@_;
2346:
2347: my $orguri=$uri;
2348: $uri=&declutter($uri);
2349:
2350: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2351: # Free bre access to adm and meta resources
2352:
2353: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2354: return 'F';
2355: }
2356:
2357: # Free bre to public access
2358:
2359: if ($priv eq 'bre') {
2360: my $copyright=&metadata($uri,'copyright');
2361: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2362: return 'F';
2363: }
2364: if ($copyright eq 'priv') {
2365: $uri=~/([^\/]+)\/([^\/]+)\//;
2366: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2367: return '';
2368: }
2369: }
2370: if ($copyright eq 'domain') {
2371: $uri=~/([^\/]+)\/([^\/]+)\//;
2372: unless (($ENV{'user.domain'} eq $1) ||
2373: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2374: return '';
2375: }
2376: }
2377: if ($ENV{'request.role'}=~ /li\.\//) {
2378: # Library role, so allow browsing of resources in this domain.
2379: return 'F';
2380: }
2381: if ($copyright eq 'custom') {
2382: unless (&customaccess($priv,$uri)) { return ''; }
2383: }
2384: }
2385: # Domain coordinator is trying to create a course
2386: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2387: # uri is the requested domain in this case.
2388: # comparison to 'request.role.domain' shows if the user has selected
2389: # a role of dc for the domain in question.
2390: return 'F' if ($uri eq $ENV{'request.role.domain'});
2391: }
2392:
2393: my $thisallowed='';
2394: my $statecond=0;
2395: my $courseprivid='';
2396:
2397: # Course
2398:
2399: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2400: $thisallowed.=$1;
2401: }
2402:
2403: # Domain
2404:
2405: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2406: =~/$priv\&([^\:]*)/) {
2407: $thisallowed.=$1;
2408: }
2409:
2410: # Course: uri itself is a course
2411: my $courseuri=$uri;
2412: $courseuri=~s/\_(\d)/\/$1/;
2413: $courseuri=~s/^([^\/])/\/$1/;
2414:
2415: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2416: =~/$priv\&([^\:]*)/) {
2417: $thisallowed.=$1;
2418: }
2419:
2420: # URI is an uploaded document for this course
2421:
2422: if (($priv eq 'bre') &&
2423: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2424: return 'F';
2425: }
2426: # Full access at system, domain or course-wide level? Exit.
2427:
2428: if ($thisallowed=~/F/) {
2429: return 'F';
2430: }
2431:
2432: # If this is generating or modifying users, exit with special codes
2433:
2434: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
2435: return $thisallowed;
2436: }
2437: #
2438: # Gathered so far: system, domain and course wide privileges
2439: #
2440: # Course: See if uri or referer is an individual resource that is part of
2441: # the course
2442:
2443: if ($ENV{'request.course.id'}) {
2444:
2445: $courseprivid=$ENV{'request.course.id'};
2446: if ($ENV{'request.course.sec'}) {
2447: $courseprivid.='/'.$ENV{'request.course.sec'};
2448: }
2449: $courseprivid=~s/\_/\//;
2450: my $checkreferer=1;
2451: my ($match,$cond)=&is_on_map($uri);
2452: if ($match) {
2453: $statecond=$cond;
2454: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2455: =~/$priv\&([^\:]*)/) {
2456: $thisallowed.=$1;
2457: $checkreferer=0;
2458: }
2459: }
2460:
2461: if ($checkreferer) {
2462: my $refuri=$ENV{'httpref.'.$orguri};
2463: unless ($refuri) {
2464: foreach (keys %ENV) {
2465: if ($_=~/^httpref\..*\*/) {
2466: my $pattern=$_;
2467: $pattern=~s/^httpref\.\/res\///;
2468: $pattern=~s/\*/\[\^\/\]\+/g;
2469: $pattern=~s/\//\\\//g;
2470: if ($orguri=~/$pattern/) {
2471: $refuri=$ENV{$_};
2472: }
2473: }
2474: }
2475: }
2476:
2477: if ($refuri) {
2478: $refuri=&declutter($refuri);
2479: my ($match,$cond)=&is_on_map($refuri);
2480: if ($match) {
2481: my $refstatecond=$cond;
2482: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2483: =~/$priv\&([^\:]*)/) {
2484: $thisallowed.=$1;
2485: $uri=$refuri;
2486: $statecond=$refstatecond;
2487: }
2488: }
2489: }
2490: }
2491: }
2492:
2493: #
2494: # Gathered now: all privileges that could apply, and condition number
2495: #
2496: #
2497: # Full or no access?
2498: #
2499:
2500: if ($thisallowed=~/F/) {
2501: return 'F';
2502: }
2503:
2504: unless ($thisallowed) {
2505: return '';
2506: }
2507:
2508: # Restrictions exist, deal with them
2509: #
2510: # C:according to course preferences
2511: # R:according to resource settings
2512: # L:unless locked
2513: # X:according to user session state
2514: #
2515:
2516: # Possibly locked functionality, check all courses
2517: # Locks might take effect only after 10 minutes cache expiration for other
2518: # courses, and 2 minutes for current course
2519:
2520: my $envkey;
2521: if ($thisallowed=~/L/) {
2522: foreach $envkey (keys %ENV) {
2523: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2524: my $courseid=$2;
2525: my $roleid=$1.'.'.$2;
2526: $courseid=~s/^\///;
2527: my $expiretime=600;
2528: if ($ENV{'request.role'} eq $roleid) {
2529: $expiretime=120;
2530: }
2531: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2532: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2533: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2534: &coursedescription($courseid);
2535: }
2536: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2537: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2538: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2539: &log($ENV{'user.domain'},$ENV{'user.name'},
2540: $ENV{'user.home'},
2541: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2542: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2543: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2544: return '';
2545: }
2546: }
2547: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2548: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2549: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2550: &log($ENV{'user.domain'},$ENV{'user.name'},
2551: $ENV{'user.home'},
2552: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2553: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2554: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2555: return '';
2556: }
2557: }
2558: }
2559: }
2560: }
2561:
2562: #
2563: # Rest of the restrictions depend on selected course
2564: #
2565:
2566: unless ($ENV{'request.course.id'}) {
2567: return '1';
2568: }
2569:
2570: #
2571: # Now user is definitely in a course
2572: #
2573:
2574:
2575: # Course preferences
2576:
2577: if ($thisallowed=~/C/) {
2578: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2579: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2580: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2581: =~/$rolecode/) {
2582: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2583: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2584: $ENV{'request.course.id'});
2585: return '';
2586: }
2587:
2588: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2589: =~/$unamedom/) {
2590: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2591: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2592: $ENV{'request.course.id'});
2593: return '';
2594: }
2595: }
2596:
2597: # Resource preferences
2598:
2599: if ($thisallowed=~/R/) {
2600: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2601: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2602: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2603: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2604: return '';
2605: }
2606: }
2607:
2608: # Restricted by state or randomout?
2609:
2610: if ($thisallowed=~/X/) {
2611: if ($ENV{'acc.randomout'}) {
2612: my $symb=&symbread($uri,1);
2613: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2614: return '';
2615: }
2616: }
2617: if (&condval($statecond)) {
2618: return '2';
2619: } else {
2620: return '';
2621: }
2622: }
2623:
2624: return 'F';
2625: }
2626:
2627: # --------------------------------------------------- Is a resource on the map?
2628:
2629: sub is_on_map {
2630: my $uri=&declutter(shift);
2631: my @uriparts=split(/\//,$uri);
2632: my $filename=$uriparts[$#uriparts];
2633: my $pathname=$uri;
2634: $pathname=~s|/\Q$filename\E$||;
2635: $pathname=~s/^adm\/wrapper\///;
2636: #Trying to find the conditional for the file
2637: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2638: /\&\Q$filename\E\:([\d\|]+)\&/);
2639: if ($match) {
2640: return (1,$1);
2641: } else {
2642: my ($name,$ext)=($filename=~/^(.+)\.(\w+)$/);
2643: $ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2644: /\&(\Q$name\E\.\d+\.$ext)\:([\d\|]+)\&/;
2645: return (0,$2,$pathname.'/'.$1);
2646: }
2647: }
2648:
2649: # ----------------------------------------------------------------- Define Role
2650:
2651: sub definerole {
2652: if (allowed('mcr','/')) {
2653: my ($rolename,$sysrole,$domrole,$courole)=@_;
2654: foreach (split(':',$sysrole)) {
2655: my ($crole,$cqual)=split(/\&/,$_);
2656: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2657: if ($pr{'cr:s'}=~/$crole\&/) {
2658: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2659: return "refused:s:$crole&$cqual";
2660: }
2661: }
2662: }
2663: foreach (split(':',$domrole)) {
2664: my ($crole,$cqual)=split(/\&/,$_);
2665: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2666: if ($pr{'cr:d'}=~/$crole\&/) {
2667: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2668: return "refused:d:$crole&$cqual";
2669: }
2670: }
2671: }
2672: foreach (split(':',$courole)) {
2673: my ($crole,$cqual)=split(/\&/,$_);
2674: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2675: if ($pr{'cr:c'}=~/$crole\&/) {
2676: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2677: return "refused:c:$crole&$cqual";
2678: }
2679: }
2680: }
2681: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2682: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2683: "rolesdef_$rolename=".
2684: escape($sysrole.'_'.$domrole.'_'.$courole);
2685: return reply($command,$ENV{'user.home'});
2686: } else {
2687: return 'refused';
2688: }
2689: }
2690:
2691: # ---------------- Make a metadata query against the network of library servers
2692:
2693: sub metadata_query {
2694: my ($query,$custom,$customshow,$server_array)=@_;
2695: my %rhash;
2696: my @server_list = (defined($server_array) ? @$server_array
2697: : keys(%libserv) );
2698: for my $server (@server_list) {
2699: unless ($custom or $customshow) {
2700: my $reply=&reply("querysend:".&escape($query),$server);
2701: $rhash{$server}=$reply;
2702: }
2703: else {
2704: my $reply=&reply("querysend:".&escape($query).':'.
2705: &escape($custom).':'.&escape($customshow),
2706: $server);
2707: $rhash{$server}=$reply;
2708: }
2709: }
2710: return \%rhash;
2711: }
2712:
2713: # ----------------------------------------- Send log queries and wait for reply
2714:
2715: sub log_query {
2716: my ($uname,$udom,$query,%filters)=@_;
2717: my $uhome=&homeserver($uname,$udom);
2718: if ($uhome eq 'no_host') { return 'error: no_host'; }
2719: my $uhost=$hostname{$uhome};
2720: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2721: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2722: $uhome);
2723: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2724: return get_query_reply($queryid);
2725: }
2726:
2727: sub get_query_reply {
2728: my $queryid=shift;
2729: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2730: my $reply='';
2731: for (1..100) {
2732: sleep 2;
2733: if (-e $replyfile.'.end') {
2734: if (my $fh=Apache::File->new($replyfile)) {
2735: $reply.=<$fh>;
2736: $fh->close;
2737: } else { return 'error: reply_file_error'; }
2738: return &unescape($reply);
2739: }
2740: }
2741: return 'timeout:'.$queryid;
2742: }
2743:
2744: sub courselog_query {
2745: #
2746: # possible filters:
2747: # url: url or symb
2748: # username
2749: # domain
2750: # action: view, submit, grade
2751: # start: timestamp
2752: # end: timestamp
2753: #
2754: my (%filters)=@_;
2755: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2756: if ($filters{'url'}) {
2757: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2758: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2759: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2760: }
2761: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2762: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2763: return &log_query($cname,$cdom,'courselog',%filters);
2764: }
2765:
2766: sub userlog_query {
2767: my ($uname,$udom,%filters)=@_;
2768: return &log_query($uname,$udom,'userlog',%filters);
2769: }
2770:
2771: # ------------------------------------------------------------------ Plain Text
2772:
2773: sub plaintext {
2774: my $short=shift;
2775: return &mt($prp{$short});
2776: }
2777:
2778: # ----------------------------------------------------------------- Assign Role
2779:
2780: sub assignrole {
2781: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
2782: my $mrole;
2783: if ($role =~ /^cr\//) {
2784: my $cwosec=$url;
2785: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2786: unless (&allowed('ccr',$cwosec)) {
2787: &logthis('Refused custom assignrole: '.
2788: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2789: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2790: return 'refused';
2791: }
2792: $mrole='cr';
2793: } else {
2794: my $cwosec=$url;
2795: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2796: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
2797: &logthis('Refused assignrole: '.
2798: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2799: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2800: return 'refused';
2801: }
2802: $mrole=$role;
2803: }
2804: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2805: "$udom:$uname:$url".'_'."$mrole=$role";
2806: if ($end) { $command.='_'.$end; }
2807: if ($start) {
2808: if ($end) {
2809: $command.='_'.$start;
2810: } else {
2811: $command.='_0_'.$start;
2812: }
2813: }
2814: # actually delete
2815: if ($deleteflag) {
2816: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
2817: # modify command to delete the role
2818: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
2819: "$udom:$uname:$url".'_'."$mrole";
2820: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
2821: # set start and finish to negative values for userrolelog
2822: $start=-1;
2823: $end=-1;
2824: }
2825: }
2826: # send command
2827: my $answer=&reply($command,&homeserver($uname,$udom));
2828: # log new user role if status is ok
2829: if ($answer eq 'ok') {
2830: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
2831: }
2832: return $answer;
2833: }
2834:
2835: # -------------------------------------------------- Modify user authentication
2836: # Overrides without validation
2837:
2838: sub modifyuserauth {
2839: my ($udom,$uname,$umode,$upass)=@_;
2840: my $uhome=&homeserver($uname,$udom);
2841: unless (&allowed('mau',$udom)) { return 'refused'; }
2842: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2843: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2844: ' in domain '.$ENV{'request.role.domain'});
2845: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2846: &escape($upass),$uhome);
2847: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2848: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2849: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2850: &log($udom,,$uname,$uhome,
2851: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2852: $ENV{'user.name'}.', '.$umode.
2853: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2854: unless ($reply eq 'ok') {
2855: &logthis('Authentication mode error: '.$reply);
2856: return 'error: '.$reply;
2857: }
2858: return 'ok';
2859: }
2860:
2861: # --------------------------------------------------------------- Modify a user
2862:
2863: sub modifyuser {
2864: my ($udom, $uname, $uid,
2865: $umode, $upass, $first,
2866: $middle, $last, $gene,
2867: $forceid, $desiredhome, $email)=@_;
2868: $udom=~s/\W//g;
2869: $uname=~s/\W//g;
2870: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2871: $umode.', '.$first.', '.$middle.', '.
2872: $last.', '.$gene.'(forceid: '.$forceid.')'.
2873: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2874: ' desiredhome not specified').
2875: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2876: ' in domain '.$ENV{'request.role.domain'});
2877: my $uhome=&homeserver($uname,$udom,'true');
2878: # ----------------------------------------------------------------- Create User
2879: if (($uhome eq 'no_host') &&
2880: (($umode && $upass) || ($umode eq 'localauth'))) {
2881: my $unhome='';
2882: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2883: $unhome = $desiredhome;
2884: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2885: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2886: } else { # load balancing routine for determining $unhome
2887: my $tryserver;
2888: my $loadm=10000000;
2889: foreach $tryserver (keys %libserv) {
2890: if ($hostdom{$tryserver} eq $udom) {
2891: my $answer=reply('load',$tryserver);
2892: if (($answer=~/\d+/) && ($answer<$loadm)) {
2893: $loadm=$answer;
2894: $unhome=$tryserver;
2895: }
2896: }
2897: }
2898: }
2899: if (($unhome eq '') || ($unhome eq 'no_host')) {
2900: return 'error: unable to find a home server for '.$uname.
2901: ' in domain '.$udom;
2902: }
2903: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2904: &escape($upass),$unhome);
2905: unless ($reply eq 'ok') {
2906: return 'error: '.$reply;
2907: }
2908: $uhome=&homeserver($uname,$udom,'true');
2909: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2910: return 'error: unable verify users home machine.';
2911: }
2912: } # End of creation of new user
2913: # ---------------------------------------------------------------------- Add ID
2914: if ($uid) {
2915: $uid=~tr/A-Z/a-z/;
2916: my %uidhash=&idrget($udom,$uname);
2917: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2918: && (!$forceid)) {
2919: unless ($uid eq $uidhash{$uname}) {
2920: return 'error: user id "'.$uid.'" does not match '.
2921: 'current user id "'.$uidhash{$uname}.'".';
2922: }
2923: } else {
2924: &idput($udom,($uname => $uid));
2925: }
2926: }
2927: # -------------------------------------------------------------- Add names, etc
2928: my @tmp=&get('environment',
2929: ['firstname','middlename','lastname','generation'],
2930: $udom,$uname);
2931: my %names;
2932: if ($tmp[0] =~ m/^error:.*/) {
2933: %names=();
2934: } else {
2935: %names = @tmp;
2936: }
2937: #
2938: # Make sure to not trash student environment if instructor does not bother
2939: # to supply name and email information
2940: #
2941: if ($first) { $names{'firstname'} = $first; }
2942: if (defined($middle)) { $names{'middlename'} = $middle; }
2943: if ($last) { $names{'lastname'} = $last; }
2944: if (defined($gene)) { $names{'generation'} = $gene; }
2945: if ($email) { $names{'notification'} = $email;
2946: $names{'critnotification'} = $email; }
2947:
2948: my $reply = &put('environment', \%names, $udom,$uname);
2949: if ($reply ne 'ok') { return 'error: '.$reply; }
2950: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2951: $umode.', '.$first.', '.$middle.', '.
2952: $last.', '.$gene.' by '.
2953: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2954: return 'ok';
2955: }
2956:
2957: # -------------------------------------------------------------- Modify student
2958:
2959: sub modifystudent {
2960: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2961: $end,$start,$forceid,$desiredhome,$email)=@_;
2962: my $cid='';
2963: unless ($cid=$ENV{'request.course.id'}) {
2964: return 'not_in_class';
2965: }
2966: # --------------------------------------------------------------- Make the user
2967: my $reply=&modifyuser
2968: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2969: $desiredhome,$email);
2970: unless ($reply eq 'ok') { return $reply; }
2971: # This will cause &modify_student_enrollment to get the uid from the
2972: # students environment
2973: $uid = undef if (!$forceid);
2974: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2975: $last,$gene,$usec,$end,$start);
2976: return $reply;
2977: }
2978:
2979: sub modify_student_enrollment {
2980: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2981: # Get the course id from the environment
2982: my $cid='';
2983: unless ($cid=$ENV{'request.course.id'}) {
2984: return 'not_in_class';
2985: }
2986: # Make sure the user exists
2987: my $uhome=&homeserver($uname,$udom);
2988: if (($uhome eq '') || ($uhome eq 'no_host')) {
2989: return 'error: no such user';
2990: }
2991: #
2992: # Get student data if we were not given enough information
2993: if (!defined($first) || $first eq '' ||
2994: !defined($last) || $last eq '' ||
2995: !defined($uid) || $uid eq '' ||
2996: !defined($middle) || $middle eq '' ||
2997: !defined($gene) || $gene eq '') {
2998: # They did not supply us with enough data to enroll the student, so
2999: # we need to pick up more information.
3000: my %tmp = &get('environment',
3001: ['firstname','middlename','lastname', 'generation','id']
3002: ,$udom,$uname);
3003:
3004: foreach (keys(%tmp)) {
3005: &logthis("key $_ = ".$tmp{$_});
3006: }
3007: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3008: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3009: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3010: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3011: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3012: }
3013: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
3014: $first,$middle);
3015: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
3016: $ENV{'course.'.$cid.'.num'}.':classlist:'.
3017: &escape($uname.':'.$udom).'='.
3018: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
3019: $ENV{'course.'.$cid.'.home'});
3020: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3021: return 'error: '.$reply;
3022: }
3023: # Add student role to user
3024: my $uurl='/'.$cid;
3025: $uurl=~s/\_/\//g;
3026: if ($usec) {
3027: $uurl.='/'.$usec;
3028: }
3029: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3030: }
3031:
3032: # ------------------------------------------------- Write to course preferences
3033:
3034: sub writecoursepref {
3035: my ($courseid,%prefs)=@_;
3036: $courseid=~s/^\///;
3037: $courseid=~s/\_/\//g;
3038: my ($cdomain,$cnum)=split(/\//,$courseid);
3039: my $chome=homeserver($cnum,$cdomain);
3040: if (($chome eq '') || ($chome eq 'no_host')) {
3041: return 'error: no such course';
3042: }
3043: my $cstring='';
3044: foreach (keys %prefs) {
3045: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3046: }
3047: $cstring=~s/\&$//;
3048: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3049: }
3050:
3051: # ---------------------------------------------------------- Make/modify course
3052:
3053: sub createcourse {
3054: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
3055: $url=&declutter($url);
3056: my $cid='';
3057: unless (&allowed('ccc',$udom)) {
3058: return 'refused';
3059: }
3060: # ------------------------------------------------------------------- Create ID
3061: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3062: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3063: # ----------------------------------------------- Make sure that does not exist
3064: my $uhome=&homeserver($uname,$udom,'true');
3065: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3066: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3067: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3068: $uhome=&homeserver($uname,$udom,'true');
3069: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3070: return 'error: unable to generate unique course-ID';
3071: }
3072: }
3073: # ------------------------------------------------ Check supplied server name
3074: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3075: if (! exists($libserv{$course_server})) {
3076: return 'error:bad server name '.$course_server;
3077: }
3078: # ------------------------------------------------------------- Make the course
3079: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3080: $course_server);
3081: unless ($reply eq 'ok') { return 'error: '.$reply; }
3082: $uhome=&homeserver($uname,$udom,'true');
3083: if (($uhome eq '') || ($uhome eq 'no_host')) {
3084: return 'error: no such course';
3085: }
3086: # ----------------------------------------------------------------- Course made
3087: # log existance
3088: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),
3089: $uhome);
3090: &flushcourselogs();
3091: # set toplevel url
3092: my $topurl=$url;
3093: unless ($nonstandard) {
3094: # ------------------------------------------ For standard courses, make top url
3095: my $mapurl=&clutter($url);
3096: if ($mapurl eq '/res/') { $mapurl=''; }
3097: $ENV{'form.initmap'}=(<<ENDINITMAP);
3098: <map>
3099: <resource id="1" type="start"></resource>
3100: <resource id="2" src="$mapurl"></resource>
3101: <resource id="3" type="finish"></resource>
3102: <link index="1" from="1" to="2"></link>
3103: <link index="2" from="2" to="3"></link>
3104: </map>
3105: ENDINITMAP
3106: $topurl=&declutter(
3107: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3108: );
3109: }
3110: # ----------------------------------------------------------- Write preferences
3111: &writecoursepref($udom.'_'.$uname,
3112: ('description' => $description,
3113: 'url' => $topurl));
3114: return '/'.$udom.'/'.$uname;
3115: }
3116:
3117: # ---------------------------------------------------------- Assign Custom Role
3118:
3119: sub assigncustomrole {
3120: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3121: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3122: $end,$start,$deleteflag);
3123: }
3124:
3125: # ----------------------------------------------------------------- Revoke Role
3126:
3127: sub revokerole {
3128: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3129: my $now=time;
3130: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3131: }
3132:
3133: # ---------------------------------------------------------- Revoke Custom Role
3134:
3135: sub revokecustomrole {
3136: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3137: my $now=time;
3138: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3139: $deleteflag);
3140: }
3141:
3142: # ------------------------------------------------------------ Directory lister
3143:
3144: sub dirlist {
3145: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3146:
3147: $uri=~s/^\///;
3148: $uri=~s/\/$//;
3149: my ($udom, $uname);
3150: (undef,$udom,$uname)=split(/\//,$uri);
3151: if(defined($userdomain)) {
3152: $udom = $userdomain;
3153: }
3154: if(defined($username)) {
3155: $uname = $username;
3156: }
3157:
3158: my $dirRoot = $perlvar{'lonDocRoot'};
3159: if(defined($alternateDirectoryRoot)) {
3160: $dirRoot = $alternateDirectoryRoot;
3161: $dirRoot =~ s/\/$//;
3162: }
3163:
3164: if($udom) {
3165: if($uname) {
3166: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3167: homeserver($uname,$udom));
3168: return split(/:/,$listing);
3169: } elsif(!defined($alternateDirectoryRoot)) {
3170: my $tryserver;
3171: my %allusers=();
3172: foreach $tryserver (keys %libserv) {
3173: if($hostdom{$tryserver} eq $udom) {
3174: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3175: $udom, $tryserver);
3176: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3177: && ($listing ne 'con_lost')) {
3178: foreach (split(/:/,$listing)) {
3179: my ($entry,@stat)=split(/&/,$_);
3180: $allusers{$entry}=1;
3181: }
3182: }
3183: }
3184: }
3185: my $alluserstr='';
3186: foreach (sort keys %allusers) {
3187: $alluserstr.=$_.'&user:';
3188: }
3189: $alluserstr=~s/:$//;
3190: return split(/:/,$alluserstr);
3191: } else {
3192: my @emptyResults = ();
3193: push(@emptyResults, 'missing user name');
3194: return split(':',@emptyResults);
3195: }
3196: } elsif(!defined($alternateDirectoryRoot)) {
3197: my $tryserver;
3198: my %alldom=();
3199: foreach $tryserver (keys %libserv) {
3200: $alldom{$hostdom{$tryserver}}=1;
3201: }
3202: my $alldomstr='';
3203: foreach (sort keys %alldom) {
3204: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3205: }
3206: $alldomstr=~s/:$//;
3207: return split(/:/,$alldomstr);
3208: } else {
3209: my @emptyResults = ();
3210: push(@emptyResults, 'missing domain');
3211: return split(':',@emptyResults);
3212: }
3213: }
3214:
3215: # --------------------------------------------- GetFileTimestamp
3216: # This function utilizes dirlist and returns the date stamp for
3217: # when it was last modified. It will also return an error of -1
3218: # if an error occurs
3219:
3220: ##
3221: ## FIXME: This subroutine assumes its caller knows something about the
3222: ## directory structure of the home server for the student ($root).
3223: ## Not a good assumption to make. Since this is for looking up files
3224: ## in user directories, the full path should be constructed by lond, not
3225: ## whatever machine we request data from.
3226: ##
3227: sub GetFileTimestamp {
3228: my ($studentDomain,$studentName,$filename,$root)=@_;
3229: $studentDomain=~s/\W//g;
3230: $studentName=~s/\W//g;
3231: my $subdir=$studentName.'__';
3232: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3233: my $proname="$studentDomain/$subdir/$studentName";
3234: $proname .= '/'.$filename;
3235: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3236: $studentName, $root);
3237: my @stats = split('&', $fileStat);
3238: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
3239: # @stats contains first the filename, then the stat output
3240: return $stats[10]; # so this is 10 instead of 9.
3241: } else {
3242: return -1;
3243: }
3244: }
3245:
3246: # -------------------------------------------------------- Value of a Condition
3247:
3248: sub directcondval {
3249: my $number=shift;
3250: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3251: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3252: } else {
3253: return 2;
3254: }
3255: }
3256:
3257: sub condval {
3258: my $condidx=shift;
3259: my $result=0;
3260: my $allpathcond='';
3261: foreach (split(/\|/,$condidx)) {
3262: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3263: $allpathcond.=
3264: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3265: }
3266: }
3267: $allpathcond=~s/\|$//;
3268: if ($ENV{'request.course.id'}) {
3269: if ($allpathcond) {
3270: my $operand='|';
3271: my @stack;
3272: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3273: if ($_ eq '(') {
3274: push @stack,($operand,$result)
3275: } elsif ($_ eq ')') {
3276: my $before=pop @stack;
3277: if (pop @stack eq '&') {
3278: $result=$result>$before?$before:$result;
3279: } else {
3280: $result=$result>$before?$result:$before;
3281: }
3282: } elsif (($_ eq '&') || ($_ eq '|')) {
3283: $operand=$_;
3284: } else {
3285: my $new=directcondval($_);
3286: if ($operand eq '&') {
3287: $result=$result>$new?$new:$result;
3288: } else {
3289: $result=$result>$new?$result:$new;
3290: }
3291: }
3292: }
3293: }
3294: }
3295: return $result;
3296: }
3297:
3298: # ---------------------------------------------------- Devalidate courseresdata
3299:
3300: sub devalidatecourseresdata {
3301: my ($coursenum,$coursedomain)=@_;
3302: my $hashid=$coursenum.':'.$coursedomain;
3303: delete $courseresdatacache{$hashid.'.time'};
3304: }
3305:
3306: # --------------------------------------------------- Course Resourcedata Query
3307:
3308: sub courseresdata {
3309: my ($coursenum,$coursedomain,@which)=@_;
3310: my $coursehom=&homeserver($coursenum,$coursedomain);
3311: my $hashid=$coursenum.':'.$coursedomain;
3312: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,300);
3313: unless (defined($cached)) {
3314: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3315: $result=\%dumpreply;
3316: my ($tmp) = keys(%dumpreply);
3317: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3318: &do_cache(\%courseresdatacache,$hashid,$result);
3319: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3320: return $tmp;
3321: } elsif ($tmp =~ /^(error)/) {
3322: $result=undef;
3323: &do_cache(\%courseresdatacache,$hashid,$result);
3324: }
3325: }
3326: foreach my $item (@which) {
3327: if (defined($result->{$item})) {
3328: return $result->{$item};
3329: }
3330: }
3331: return undef;
3332: }
3333:
3334: #
3335: # EXT resource caching routines
3336: #
3337:
3338: sub clear_EXT_cache_status {
3339: &delenv('cache.EXT.');
3340: }
3341:
3342: sub EXT_cache_status {
3343: my ($target_domain,$target_user) = @_;
3344: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3345: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
3346: # We know already the user has no data
3347: return 1;
3348: } else {
3349: return 0;
3350: }
3351: }
3352:
3353: sub EXT_cache_set {
3354: my ($target_domain,$target_user) = @_;
3355: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3356: &appenv($cachename => time);
3357: }
3358:
3359: # --------------------------------------------------------- Value of a Variable
3360: sub EXT {
3361: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
3362:
3363: unless ($varname) { return ''; }
3364: #get real user name/domain, courseid and symb
3365: my $courseid;
3366: my $publicuser;
3367: if (!($uname && $udom)) {
3368: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
3369: &Apache::lonxml::whichuser($symbparm);
3370: if (!$symbparm) { $symbparm=$cursymb; }
3371: } else {
3372: $courseid=$ENV{'request.course.id'};
3373: }
3374: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3375: my $rest;
3376: if (defined($therest[0])) {
3377: $rest=join('.',@therest);
3378: } else {
3379: $rest='';
3380: }
3381:
3382: my $qualifierrest=$qualifier;
3383: if ($rest) { $qualifierrest.='.'.$rest; }
3384: my $spacequalifierrest=$space;
3385: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
3386: if ($realm eq 'user') {
3387: # --------------------------------------------------------------- user.resource
3388: if ($space eq 'resource') {
3389: if (defined($Apache::lonhomework::parsing_a_problem)) {
3390: return $Apache::lonhomework::history{$qualifierrest};
3391: } else {
3392: my %restored;
3393: if ($publicuser || $ENV{'request.state'} eq 'construct') {
3394: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
3395: } else {
3396: %restored=&restore($symbparm,$courseid,$udom,$uname);
3397: }
3398: return $restored{$qualifierrest};
3399: }
3400: # ----------------------------------------------------------------- user.access
3401: } elsif ($space eq 'access') {
3402: # FIXME - not supporting calls for a specific user
3403: return &allowed($qualifier,$rest);
3404: # ------------------------------------------ user.preferences, user.environment
3405: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
3406: if (($uname eq $ENV{'user.name'}) &&
3407: ($udom eq $ENV{'user.domain'})) {
3408: return $ENV{join('.',('environment',$qualifierrest))};
3409: } else {
3410: my %returnhash;
3411: if (!$publicuser) {
3412: %returnhash=&userenvironment($udom,$uname,
3413: $qualifierrest);
3414: }
3415: return $returnhash{$qualifierrest};
3416: }
3417: # ----------------------------------------------------------------- user.course
3418: } elsif ($space eq 'course') {
3419: # FIXME - not supporting calls for a specific user
3420: return $ENV{join('.',('request.course',$qualifier))};
3421: # ------------------------------------------------------------------- user.role
3422: } elsif ($space eq 'role') {
3423: # FIXME - not supporting calls for a specific user
3424: my ($role,$where)=split(/\./,$ENV{'request.role'});
3425: if ($qualifier eq 'value') {
3426: return $role;
3427: } elsif ($qualifier eq 'extent') {
3428: return $where;
3429: }
3430: # ----------------------------------------------------------------- user.domain
3431: } elsif ($space eq 'domain') {
3432: return $udom;
3433: # ------------------------------------------------------------------- user.name
3434: } elsif ($space eq 'name') {
3435: return $uname;
3436: # ---------------------------------------------------- Any other user namespace
3437: } else {
3438: my %reply;
3439: if (!$publicuser) {
3440: %reply=&get($space,[$qualifierrest],$udom,$uname);
3441: }
3442: return $reply{$qualifierrest};
3443: }
3444: } elsif ($realm eq 'query') {
3445: # ---------------------------------------------- pull stuff out of query string
3446: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
3447: [$spacequalifierrest]);
3448: return $ENV{'form.'.$spacequalifierrest};
3449: } elsif ($realm eq 'request') {
3450: # ------------------------------------------------------------- request.browser
3451: if ($space eq 'browser') {
3452: return $ENV{'browser.'.$qualifier};
3453: # ------------------------------------------------------------ request.filename
3454: } else {
3455: return $ENV{'request.'.$spacequalifierrest};
3456: }
3457: } elsif ($realm eq 'course') {
3458: # ---------------------------------------------------------- course.description
3459: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3460: } elsif ($realm eq 'resource') {
3461:
3462: my $section;
3463: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
3464:
3465: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3466:
3467: # ----------------------------------------------------- Cascading lookup scheme
3468: if (!$symbparm) { $symbparm=&symbread(); }
3469: my $symbp=$symbparm;
3470: my $mapp=(&decode_symb($symbp))[0];
3471:
3472: my $symbparm=$symbp.'.'.$spacequalifierrest;
3473: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3474:
3475: if (($ENV{'user.name'} eq $uname) &&
3476: ($ENV{'user.domain'} eq $udom)) {
3477: $section=$ENV{'request.course.sec'};
3478: } else {
3479: if (! defined($usection)) {
3480: $section=&usection($udom,$uname,$courseid);
3481: } else {
3482: $section = $usection;
3483: }
3484: }
3485:
3486: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3487: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3488: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3489:
3490: my $courselevel=$courseid.'.'.$spacequalifierrest;
3491: my $courselevelr=$courseid.'.'.$symbparm;
3492: my $courselevelm=$courseid.'.'.$mapparm;
3493:
3494: # ----------------------------------------------------------- first, check user
3495: #most student don\'t have any data set, check if there is some data
3496: #every thirty minutes
3497: if (! &EXT_cache_status($udom,$uname)) {
3498: my %resourcedata=&get('resourcedata',
3499: [$courselevelr,$courselevelm,$courselevel],
3500: $udom,$uname);
3501: my ($tmp)=keys(%resourcedata);
3502: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3503: if ($resourcedata{$courselevelr}) {
3504: return $resourcedata{$courselevelr}; }
3505: if ($resourcedata{$courselevelm}) {
3506: return $resourcedata{$courselevelm}; }
3507: if ($resourcedata{$courselevel}) {
3508: return $resourcedata{$courselevel}; }
3509: } else {
3510: if ($tmp!~/No such file/) {
3511: &logthis("<font color=blue>WARNING:".
3512: " Trying to get resource data for ".
3513: $uname." at ".$udom.": ".
3514: $tmp."</font>");
3515: } elsif ($tmp=~/error:No such file/) {
3516: &EXT_cache_set($udom,$uname);
3517: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3518: return $tmp;
3519: }
3520: }
3521: }
3522:
3523: # -------------------------------------------------------- second, check course
3524:
3525: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3526: $ENV{'course.'.$courseid.'.domain'},
3527: ($seclevelr,$seclevelm,$seclevel,
3528: $courselevelr,$courselevelm,
3529: $courselevel));
3530: if (defined($coursereply)) { return $coursereply; }
3531:
3532: # ------------------------------------------------------ third, check map parms
3533: my %parmhash=();
3534: my $thisparm='';
3535: if (tie(%parmhash,'GDBM_File',
3536: $ENV{'request.course.fn'}.'_parms.db',
3537: &GDBM_READER(),0640)) {
3538: $thisparm=$parmhash{$symbparm};
3539: untie(%parmhash);
3540: }
3541: if ($thisparm) { return $thisparm; }
3542: }
3543: # --------------------------------------------- last, look in resource metadata
3544:
3545: $spacequalifierrest=~s/\./\_/;
3546: my $filename;
3547: if (!$symbparm) { $symbparm=&symbread(); }
3548: if ($symbparm) {
3549: $filename=(&decode_symb($symbparm))[2];
3550: } else {
3551: $filename=$ENV{'request.filename'};
3552: }
3553: my $metadata=&metadata($filename,$spacequalifierrest);
3554: if (defined($metadata)) { return $metadata; }
3555: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3556: if (defined($metadata)) { return $metadata; }
3557:
3558: # ------------------------------------------------------------------ Cascade up
3559: unless ($space eq '0') {
3560: my @parts=split(/_/,$space);
3561: my $id=pop(@parts);
3562: my $part=join('_',@parts);
3563: if ($part eq '') { $part='0'; }
3564: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3565: $symbparm,$udom,$uname,$section,1);
3566: if (defined($partgeneral)) { return $partgeneral; }
3567: }
3568: if ($recurse) { return undef; }
3569: my $pack_def=&packages_tab_default($filename,$varname);
3570: if (defined($pack_def)) { return $pack_def; }
3571:
3572: # ---------------------------------------------------- Any other user namespace
3573: } elsif ($realm eq 'environment') {
3574: # ----------------------------------------------------------------- environment
3575: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3576: return $ENV{'environment.'.$spacequalifierrest};
3577: } else {
3578: my %returnhash=&userenvironment($udom,$uname,
3579: $spacequalifierrest);
3580: return $returnhash{$spacequalifierrest};
3581: }
3582: } elsif ($realm eq 'system') {
3583: # ----------------------------------------------------------------- system.time
3584: if ($space eq 'time') {
3585: return time;
3586: }
3587: }
3588: return '';
3589: }
3590:
3591: sub packages_tab_default {
3592: my ($uri,$varname)=@_;
3593: my (undef,$part,$name)=split(/\./,$varname);
3594: my $packages=&metadata($uri,'packages');
3595: foreach my $package (split(/,/,$packages)) {
3596: my ($pack_type,$pack_part)=split(/_/,$package,2);
3597: if ($pack_part eq $part) {
3598: return $packagetab{"$pack_type&$name&default"};
3599: }
3600: }
3601: return undef;
3602: }
3603:
3604: sub add_prefix_and_part {
3605: my ($prefix,$part)=@_;
3606: my $keyroot;
3607: if (defined($prefix) && $prefix !~ /^__/) {
3608: # prefix that has a part already
3609: $keyroot=$prefix;
3610: } elsif (defined($prefix)) {
3611: # prefix that is missing a part
3612: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3613: } else {
3614: # no prefix at all
3615: if (defined($part)) { $keyroot='_'.$part; }
3616: }
3617: return $keyroot;
3618: }
3619:
3620: # ---------------------------------------------------------------- Get metadata
3621:
3622: sub metadata {
3623: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3624:
3625: $uri=&declutter($uri);
3626: # if it is a non metadata possible uri return quickly
3627: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3628: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
3629: return '';
3630: }
3631: my $filename=$uri;
3632: $uri=~s/\.meta$//;
3633: #
3634: # Is the metadata already cached?
3635: # Look at timestamp of caching
3636: # Everything is cached by the main uri, libraries are never directly cached
3637: #
3638: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3639: #
3640: # Is this a recursive call for a library?
3641: #
3642: if ($liburi) {
3643: $liburi=&declutter($liburi);
3644: $filename=$liburi;
3645: } else {
3646: delete($metacache{$uri.':packages'});
3647: }
3648: my %metathesekeys=();
3649: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3650: my $metastring=&getfile(&filelocation('',&clutter($filename)));
3651: my $parser=HTML::LCParser->new(\$metastring);
3652: my $token;
3653: undef %metathesekeys;
3654: while ($token=$parser->get_token) {
3655: if ($token->[0] eq 'S') {
3656: if (defined($token->[2]->{'package'})) {
3657: #
3658: # This is a package - get package info
3659: #
3660: my $package=$token->[2]->{'package'};
3661: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3662: if (defined($token->[2]->{'id'})) {
3663: $keyroot.='_'.$token->[2]->{'id'};
3664: }
3665: if ($metacache{$uri.':packages'}) {
3666: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3667: } else {
3668: $metacache{$uri.':packages'}=$package.$keyroot;
3669: }
3670: foreach (keys %packagetab) {
3671: if ($_=~/^$package\&/) {
3672: my ($pack,$name,$subp)=split(/\&/,$_);
3673: # ignore package.tab specified default values
3674: # here &package_tab_default() will fetch those
3675: if ($subp eq 'default') { next; }
3676: my $value=$packagetab{$_};
3677: my $part=$keyroot;
3678: $part=~s/^\_//;
3679: if ($subp eq 'display') {
3680: $value.=' [Part: '.$part.']';
3681: }
3682: my $unikey='parameter'.$keyroot.'_'.$name;
3683: $metacache{$uri.':'.$unikey.'.part'}=$part;
3684: $metathesekeys{$unikey}=1;
3685: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3686: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3687: }
3688: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3689: $metacache{$uri.':'.$unikey}=
3690: $metacache{$uri.':'.$unikey.'.default'};
3691: }
3692: }
3693: }
3694: } else {
3695: #
3696: # This is not a package - some other kind of start tag
3697: #
3698: my $entry=$token->[1];
3699: my $unikey;
3700: if ($entry eq 'import') {
3701: $unikey='';
3702: } else {
3703: $unikey=$entry;
3704: }
3705: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3706:
3707: if (defined($token->[2]->{'id'})) {
3708: $unikey.='_'.$token->[2]->{'id'};
3709: }
3710:
3711: if ($entry eq 'import') {
3712: #
3713: # Importing a library here
3714: #
3715: if ($depthcount<20) {
3716: my $location=$parser->get_text('/import');
3717: my $dir=$filename;
3718: $dir=~s|[^/]*$||;
3719: $location=&filelocation($dir,$location);
3720: foreach (sort(split(/\,/,&metadata($uri,'keys',
3721: $location,$unikey,
3722: $depthcount+1)))) {
3723: $metathesekeys{$_}=1;
3724: }
3725: }
3726: } else {
3727:
3728: if (defined($token->[2]->{'name'})) {
3729: $unikey.='_'.$token->[2]->{'name'};
3730: }
3731: $metathesekeys{$unikey}=1;
3732: foreach (@{$token->[3]}) {
3733: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3734: }
3735: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3736: my $default=$metacache{$uri.':'.$unikey.'.default'};
3737: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3738: # only ws inside the tag, and not in default, so use default
3739: # as value
3740: $metacache{$uri.':'.$unikey}=$default;
3741: } else {
3742: # either something interesting inside the tag or default
3743: # uninteresting
3744: $metacache{$uri.':'.$unikey}=$internaltext;
3745: }
3746: # end of not-a-package not-a-library import
3747: }
3748: # end of not-a-package start tag
3749: }
3750: # the next is the end of "start tag"
3751: }
3752: }
3753: # are there custom rights to evaluate
3754: if ($metacache{$uri.':copyright'} eq 'custom') {
3755:
3756: #
3757: # Importing a rights file here
3758: #
3759: unless ($depthcount) {
3760: my $location=$metacache{$uri.':customdistributionfile'};
3761: my $dir=$filename;
3762: $dir=~s|[^/]*$||;
3763: $location=&filelocation($dir,$location);
3764: foreach (sort(split(/\,/,&metadata($uri,'keys',
3765: $location,'_rights',
3766: $depthcount+1)))) {
3767: $metathesekeys{$_}=1;
3768: }
3769: }
3770: }
3771: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3772: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3773: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3774: $metacache{$uri.':cachedtimestamp'}=time;
3775: # this is the end of "was not already recently cached
3776: }
3777: return $metacache{$uri.':'.$what};
3778: }
3779:
3780: sub metadata_generate_part0 {
3781: my ($metadata,$metacache,$uri) = @_;
3782: my %allnames;
3783: foreach my $metakey (sort keys %$metadata) {
3784: if ($metakey=~/^parameter\_(.*)/) {
3785: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3786: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3787: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
3788: $allnames{$name}=$part;
3789: }
3790: }
3791: }
3792: foreach my $name (keys(%allnames)) {
3793: $$metadata{"parameter_0_$name"}=1;
3794: my $key="$uri:parameter_0_$name";
3795: $$metacache{"$key.part"}='0';
3796: $$metacache{"$key.name"}=$name;
3797: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3798: $allnames{$name}.'_'.$name.
3799: '.type'};
3800: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3801: '.display'};
3802: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3803: $olddis=~s/$expr/\[Part: 0\]/;
3804: $$metacache{"$key.display"}=$olddis;
3805: }
3806: }
3807:
3808: # ------------------------------------------------- Get the title of a resource
3809:
3810: sub gettitle {
3811: my $urlsymb=shift;
3812: my $symb=&symbread($urlsymb);
3813: unless ($symb) {
3814: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3815: return &metadata($urlsymb,'title');
3816: }
3817: if ($titlecache{$symb}) {
3818: if (time < ($titlecache{$symb}[1] + 600)) {
3819: return $titlecache{$symb}[0];
3820: } else {
3821: delete($titlecache{$symb});
3822: }
3823: }
3824: my ($map,$resid,$url)=&decode_symb($symb);
3825: my $title='';
3826: my %bighash;
3827: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3828: &GDBM_READER(),0640)) {
3829: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3830: $title=$bighash{'title_'.$mapid.'.'.$resid};
3831: untie %bighash;
3832: }
3833: $title=~s/\&colon\;/\:/gs;
3834: if ($title) {
3835: $titlecache{$symb}=[$title,time];
3836: return $title;
3837: } else {
3838: return &metadata($urlsymb,'title');
3839: }
3840: }
3841:
3842: # ------------------------------------------------- Update symbolic store links
3843:
3844: sub symblist {
3845: my ($mapname,%newhash)=@_;
3846: $mapname=declutter($mapname);
3847: my %hash;
3848: if (($ENV{'request.course.fn'}) && (%newhash)) {
3849: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3850: &GDBM_WRCREAT(),0640)) {
3851: foreach (keys %newhash) {
3852: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3853: }
3854: if (untie(%hash)) {
3855: return 'ok';
3856: }
3857: }
3858: }
3859: return 'error';
3860: }
3861:
3862: # --------------------------------------------------------------- Verify a symb
3863:
3864: sub symbverify {
3865: my ($symb,$thisfn)=@_;
3866: $thisfn=&declutter($thisfn);
3867: # direct jump to resource in page or to a sequence - will construct own symbs
3868: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3869: # check URL part
3870: my ($map,$resid,$url)=&decode_symb($symb);
3871: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3872:
3873: $symb=&symbclean($symb);
3874:
3875: my %bighash;
3876: my $okay=0;
3877: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3878: &GDBM_READER(),0640)) {
3879: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3880: unless ($ids) {
3881: $ids=$bighash{'ids_/'.$thisfn};
3882: }
3883: if ($ids) {
3884: # ------------------------------------------------------------------- Has ID(s)
3885: foreach (split(/\,/,$ids)) {
3886: my ($mapid,$resid)=split(/\./,$_);
3887: if (
3888: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3889: eq $symb) {
3890: $okay=1;
3891: }
3892: }
3893: }
3894: untie(%bighash);
3895: }
3896: return $okay;
3897: }
3898:
3899: # --------------------------------------------------------------- Clean-up symb
3900:
3901: sub symbclean {
3902: my $symb=shift;
3903:
3904: # remove version from map
3905: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3906:
3907: # remove version from URL
3908: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3909:
3910: return $symb;
3911: }
3912:
3913: # ---------------------------------------------- Split symb to find map and url
3914:
3915: sub decode_symb {
3916: my ($map,$resid,$url)=split(/\_\_\_/,shift);
3917: return (&fixversion($map),$resid,&fixversion($url));
3918: }
3919:
3920: sub fixversion {
3921: my $fn=shift;
3922: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
3923: my ($match,$cond,$versioned)=&is_on_map($fn);
3924: unless ($match) {
3925: $fn=$versioned;
3926: }
3927: return $fn;
3928: }
3929:
3930: # ------------------------------------------------------ Return symb list entry
3931:
3932: sub symbread {
3933: my ($thisfn,$donotrecurse)=@_;
3934: # no filename provided? try from environment
3935: unless ($thisfn) {
3936: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3937: $thisfn=$ENV{'request.filename'};
3938: }
3939: # is that filename actually a symb? Verify, clean, and return
3940: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3941: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3942: }
3943: $thisfn=declutter($thisfn);
3944: my %hash;
3945: my %bighash;
3946: my $syval='';
3947: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3948: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3949: &GDBM_READER(),0640)) {
3950: $syval=$hash{$thisfn};
3951: untie(%hash);
3952: }
3953: # ---------------------------------------------------------- There was an entry
3954: if ($syval) {
3955: unless ($syval=~/\_\d+$/) {
3956: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3957: &appenv('request.ambiguous' => $thisfn);
3958: return '';
3959: }
3960: $syval.=$1;
3961: }
3962: } else {
3963: # ------------------------------------------------------- Was not in symb table
3964: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3965: &GDBM_READER(),0640)) {
3966: # ---------------------------------------------- Get ID(s) for current resource
3967: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3968: unless ($ids) {
3969: $ids=$bighash{'ids_/'.$thisfn};
3970: }
3971: unless ($ids) {
3972: # alias?
3973: $ids=$bighash{'mapalias_'.$thisfn};
3974: }
3975: if ($ids) {
3976: # ------------------------------------------------------------------- Has ID(s)
3977: my @possibilities=split(/\,/,$ids);
3978: if ($#possibilities==0) {
3979: # ----------------------------------------------- There is only one possibility
3980: my ($mapid,$resid)=split(/\./,$ids);
3981: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3982: } elsif (!$donotrecurse) {
3983: # ------------------------------------------ There is more than one possibility
3984: my $realpossible=0;
3985: foreach (@possibilities) {
3986: my $file=$bighash{'src_'.$_};
3987: if (&allowed('bre',$file)) {
3988: my ($mapid,$resid)=split(/\./,$_);
3989: if ($bighash{'map_type_'.$mapid} ne 'page') {
3990: $realpossible++;
3991: $syval=declutter($bighash{'map_id_'.$mapid}).
3992: '___'.$resid;
3993: }
3994: }
3995: }
3996: if ($realpossible!=1) { $syval=''; }
3997: } else {
3998: $syval='';
3999: }
4000: }
4001: untie(%bighash)
4002: }
4003: }
4004: if ($syval) {
4005: return &symbclean($syval.'___'.$thisfn);
4006: }
4007: }
4008: &appenv('request.ambiguous' => $thisfn);
4009: return '';
4010: }
4011:
4012: # ---------------------------------------------------------- Return random seed
4013:
4014: sub numval {
4015: my $txt=shift;
4016: $txt=~tr/A-J/0-9/;
4017: $txt=~tr/a-j/0-9/;
4018: $txt=~tr/K-T/0-9/;
4019: $txt=~tr/k-t/0-9/;
4020: $txt=~tr/U-Z/0-5/;
4021: $txt=~tr/u-z/0-5/;
4022: $txt=~s/\D//g;
4023: return int($txt);
4024: }
4025:
4026: sub latest_rnd_algorithm_id {
4027: return '64bit';
4028: }
4029:
4030: sub rndseed {
4031: my ($symb,$courseid,$domain,$username)=@_;
4032:
4033: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
4034: if (!$symb) {
4035: unless ($symb=$wsymb) { return time; }
4036: }
4037: if (!$courseid) { $courseid=$wcourseid; }
4038: if (!$domain) { $domain=$wdomain; }
4039: if (!$username) { $username=$wusername }
4040: my $which=$ENV{"course.$courseid.rndseed"};
4041: my $CODE=$ENV{'scantron.CODE'};
4042: if (defined($CODE)) {
4043: &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
4044: } elsif ($which eq '64bit') {
4045: return &rndseed_64bit($symb,$courseid,$domain,$username);
4046: }
4047: return &rndseed_32bit($symb,$courseid,$domain,$username);
4048: }
4049:
4050: sub rndseed_32bit {
4051: my ($symb,$courseid,$domain,$username)=@_;
4052: {
4053: use integer;
4054: my $symbchck=unpack("%32C*",$symb) << 27;
4055: my $symbseed=numval($symb) << 22;
4056: my $namechck=unpack("%32C*",$username) << 17;
4057: my $nameseed=numval($username) << 12;
4058: my $domainseed=unpack("%32C*",$domain) << 7;
4059: my $courseseed=unpack("%32C*",$courseid);
4060: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4061: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4062: #&Apache::lonxml::debug("rndseed :$num:$symb");
4063: return $num;
4064: }
4065: }
4066:
4067: sub rndseed_64bit {
4068: my ($symb,$courseid,$domain,$username)=@_;
4069: {
4070: use integer;
4071: my $symbchck=unpack("%32S*",$symb) << 21;
4072: my $symbseed=numval($symb) << 10;
4073: my $namechck=unpack("%32S*",$username);
4074:
4075: my $nameseed=numval($username) << 21;
4076: my $domainseed=unpack("%32S*",$domain) << 10;
4077: my $courseseed=unpack("%32S*",$courseid);
4078:
4079: my $num1=$symbchck+$symbseed+$namechck;
4080: my $num2=$nameseed+$domainseed+$courseseed;
4081: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4082: #&Apache::lonxml::debug("rndseed :$num:$symb");
4083: return "$num1,$num2";
4084: }
4085: }
4086:
4087: sub rndseed_CODE_64bit {
4088: my ($symb,$courseid,$domain,$username)=@_;
4089: {
4090: use integer;
4091: my $symbchck=unpack("%32S*",$symb) << 16;
4092: my $symbseed=numval($symb);
4093: my $CODEseed=numval($ENV{'scantron.CODE'}) << 16;
4094: my $courseseed=unpack("%32S*",$courseid);
4095: my $num1=$symbseed+$CODEseed;
4096: my $num2=$courseseed+$symbchck;
4097: #&Apache::lonxml::debug("$symbseed:$CODEseed|$courseseed:$symbchck");
4098: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
4099: return "$num1,$num2";
4100: }
4101: }
4102:
4103: sub setup_random_from_rndseed {
4104: my ($rndseed)=@_;
4105: if ($rndseed =~/,/) {
4106: my ($num1,$num2)=split(/,/,$rndseed);
4107: &Math::Random::random_set_seed(abs($num1),abs($num2));
4108: } else {
4109: &Math::Random::random_set_seed_from_phrase($rndseed);
4110: }
4111: }
4112:
4113: sub ireceipt {
4114: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
4115: my $cuname=unpack("%32C*",$funame);
4116: my $cudom=unpack("%32C*",$fudom);
4117: my $cucourseid=unpack("%32C*",$fucourseid);
4118: my $cusymb=unpack("%32C*",$fusymb);
4119: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
4120: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
4121: ($cunique%$cuname+
4122: $cunique%$cudom+
4123: $cusymb%$cuname+
4124: $cusymb%$cudom+
4125: $cucourseid%$cuname+
4126: $cucourseid%$cudom);
4127: }
4128:
4129: sub receipt {
4130: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
4131: return &ireceipt($name,$domain,$courseid,$symb);
4132: }
4133:
4134: # ------------------------------------------------------------ Serves up a file
4135: # returns either the contents of the file or a -1
4136: sub getfile {
4137: my $file=shift;
4138: if ($file=~/^\/*uploaded\//) { # user file
4139: my $ua=new LWP::UserAgent;
4140: my $request=new HTTP::Request('GET',&tokenwrapper($file));
4141: my $response=$ua->request($request);
4142: if ($response->is_success()) {
4143: return $response->content;
4144: } else {
4145: return -1;
4146: }
4147: } else { # normal file from res space
4148: &repcopy($file);
4149: if (! -e $file ) { return -1; };
4150: my $fh=Apache::File->new($file);
4151: my $a='';
4152: while (<$fh>) { $a .=$_; }
4153: return $a;
4154: }
4155: }
4156:
4157: sub filelocation {
4158: my ($dir,$file) = @_;
4159: my $location;
4160: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
4161: if ($file=~m:^/~:) { # is a contruction space reference
4162: $location = $file;
4163: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
4164: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
4165: $location=$file;
4166: } else {
4167: $file=~s/^$perlvar{'lonDocRoot'}//;
4168: $file=~s:^/*res::;
4169: if ( !( $file =~ m:^/:) ) {
4170: $location = $dir. '/'.$file;
4171: } else {
4172: $location = '/home/httpd/html/res'.$file;
4173: }
4174: }
4175: $location=~s://+:/:g; # remove duplicate /
4176: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
4177: return $location;
4178: }
4179:
4180: sub hreflocation {
4181: my ($dir,$file)=@_;
4182: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
4183: my $finalpath=filelocation($dir,$file);
4184: $finalpath=~s/^\/home\/httpd\/html//;
4185: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
4186: return $finalpath;
4187: } else {
4188: return $file;
4189: }
4190: }
4191:
4192: # ------------------------------------------------------------- Declutters URLs
4193:
4194: sub declutter {
4195: my $thisfn=shift;
4196: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
4197: $thisfn=~s/^\///;
4198: $thisfn=~s/^res\///;
4199: $thisfn=~s/\?.+$//;
4200: return $thisfn;
4201: }
4202:
4203: # ------------------------------------------------------------- Clutter up URLs
4204:
4205: sub clutter {
4206: my $thisfn='/'.&declutter(shift);
4207: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
4208: $thisfn='/res'.$thisfn;
4209: }
4210: return $thisfn;
4211: }
4212:
4213: # -------------------------------------------------------- Escape Special Chars
4214:
4215: sub escape {
4216: my $str=shift;
4217: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4218: return $str;
4219: }
4220:
4221: # ----------------------------------------------------- Un-Escape Special Chars
4222:
4223: sub unescape {
4224: my $str=shift;
4225: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4226: return $str;
4227: }
4228:
4229: sub mod_perl_version {
4230: if (defined($perlvar{'MODPERL2'})) {
4231: return 2;
4232: }
4233: return 1;
4234: }
4235: # ================================================================ Main Program
4236:
4237: sub goodbye {
4238: &logthis("Starting Shut down");
4239: &flushcourselogs();
4240: &logthis("Shutting down");
4241: return DONE;
4242: }
4243:
4244: BEGIN {
4245: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
4246: unless ($readit) {
4247: {
4248: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
4249:
4250: while (my $configline=<$config>) {
4251: if ($configline =~ /^[^\#]*PerlSetVar/) {
4252: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4253: chomp($varvalue);
4254: $perlvar{$varname}=$varvalue;
4255: }
4256: }
4257: }
4258: {
4259: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
4260:
4261: while (my $configline=<$config>) {
4262: if ($configline =~ /^[^\#]*PerlSetVar/) {
4263: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4264: chomp($varvalue);
4265: $perlvar{$varname}=$varvalue;
4266: }
4267: }
4268: }
4269:
4270: # ------------------------------------------------------------ Read domain file
4271: {
4272: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
4273: '/domain.tab');
4274: %domaindescription = ();
4275: %domain_auth_def = ();
4276: %domain_auth_arg_def = ();
4277: if ($fh) {
4278: while (<$fh>) {
4279: next if (/^(\#|\s*$)/);
4280: # next if /^\#/;
4281: chomp;
4282: my ($domain, $domain_description, $def_auth, $def_auth_arg,
4283: $def_lang, $city, $longi, $lati) = split(/:/,$_);
4284: $domain_auth_def{$domain}=$def_auth;
4285: $domain_auth_arg_def{$domain}=$def_auth_arg;
4286: $domaindescription{$domain}=$domain_description;
4287: $domain_lang_def{$domain}=$def_lang;
4288: $domain_city{$domain}=$city;
4289: $domain_longi{$domain}=$longi;
4290: $domain_lati{$domain}=$lati;
4291:
4292: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
4293: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
4294: }
4295: }
4296: }
4297:
4298:
4299: # ------------------------------------------------------------- Read hosts file
4300: {
4301: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
4302:
4303: while (my $configline=<$config>) {
4304: next if ($configline =~ /^(\#|\s*$)/);
4305: chomp($configline);
4306: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
4307: if ($id && $domain && $role && $name && $ip) {
4308: $hostname{$id}=$name;
4309: $hostdom{$id}=$domain;
4310: $hostip{$id}=$ip;
4311: $iphost{$ip}=$id;
4312: if ($role eq 'library') { $libserv{$id}=$name; }
4313: } else {
4314: if ($configline) {
4315: &logthis("Skipping hosts.tab line -$configline-");
4316: }
4317: }
4318: }
4319: }
4320:
4321: # ------------------------------------------------------ Read spare server file
4322: {
4323: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
4324:
4325: while (my $configline=<$config>) {
4326: chomp($configline);
4327: if ($configline) {
4328: $spareid{$configline}=1;
4329: }
4330: }
4331: }
4332: # ------------------------------------------------------------ Read permissions
4333: {
4334: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
4335:
4336: while (my $configline=<$config>) {
4337: chomp($configline);
4338: if ($configline) {
4339: my ($role,$perm)=split(/ /,$configline);
4340: if ($perm ne '') { $pr{$role}=$perm; }
4341: }
4342: }
4343: }
4344:
4345: # -------------------------------------------- Read plain texts for permissions
4346: {
4347: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
4348:
4349: while (my $configline=<$config>) {
4350: chomp($configline);
4351: if ($configline) {
4352: my ($short,$plain)=split(/:/,$configline);
4353: if ($plain ne '') { $prp{$short}=$plain; }
4354: }
4355: }
4356: }
4357:
4358: # ---------------------------------------------------------- Read package table
4359: {
4360: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
4361:
4362: while (my $configline=<$config>) {
4363: chomp($configline);
4364: my ($short,$plain)=split(/:/,$configline);
4365: my ($pack,$name)=split(/\&/,$short);
4366: if ($plain ne '') {
4367: $packagetab{$pack.'&'.$name.'&name'}=$name;
4368: $packagetab{$short}=$plain;
4369: }
4370: }
4371: }
4372:
4373: # ------------- set up temporary directory
4374: {
4375: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
4376:
4377: }
4378:
4379: %metacache=();
4380:
4381: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
4382: $dumpcount=0;
4383:
4384: &logtouch();
4385: &logthis('<font color=yellow>INFO: Read configuration</font>');
4386: $readit=1;
4387: }
4388: }
4389:
4390: 1;
4391: __END__
4392:
4393: =pod
4394:
4395: =head1 NAME
4396:
4397: Apache::lonnet - Subroutines to ask questions about things in the network.
4398:
4399: =head1 SYNOPSIS
4400:
4401: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
4402:
4403: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
4404:
4405: Common parameters:
4406:
4407: =over 4
4408:
4409: =item *
4410:
4411: $uname : an internal username (if $cname expecting a course Id specifically)
4412:
4413: =item *
4414:
4415: $udom : a domain (if $cdom expecting a course's domain specifically)
4416:
4417: =item *
4418:
4419: $symb : a resource instance identifier
4420:
4421: =item *
4422:
4423: $namespace : the name of a .db file that contains the data needed or
4424: being set.
4425:
4426: =back
4427:
4428: =head1 OVERVIEW
4429:
4430: lonnet provides subroutines which interact with the
4431: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
4432: about classes, users, and resources.
4433:
4434: For many of these objects you can also use this to store data about
4435: them or modify them in various ways.
4436:
4437: =head2 Symbs
4438:
4439: To identify a specific instance of a resource, LON-CAPA uses symbols
4440: or "symbs"X<symb>. These identifiers are built from the URL of the
4441: map, the resource number of the resource in the map, and the URL of
4442: the resource itself. The latter is somewhat redundant, but might help
4443: if maps change.
4444:
4445: An example is
4446:
4447: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
4448:
4449: The respective map entry is
4450:
4451: <resource id="19" src="/res/msu/korte/tests/part12.problem"
4452: title="Problem 2">
4453: </resource>
4454:
4455: Symbs are used by the random number generator, as well as to store and
4456: restore data specific to a certain instance of for example a problem.
4457:
4458: =head2 Storing And Retrieving Data
4459:
4460: X<store()>X<cstore()>X<restore()>Three of the most important functions
4461: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
4462: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
4463: is is the non-critical message twin of cstore. These functions are for
4464: handlers to store a perl hash to a user's permanent data space in an
4465: easy manner, and to retrieve it again on another call. It is expected
4466: that a handler would use this once at the beginning to retrieve data,
4467: and then again once at the end to send only the new data back.
4468:
4469: The data is stored in the user's data directory on the user's
4470: homeserver under the ID of the course.
4471:
4472: The hash that is returned by restore will have all of the previous
4473: value for all of the elements of the hash.
4474:
4475: Example:
4476:
4477: #creating a hash
4478: my %hash;
4479: $hash{'foo'}='bar';
4480:
4481: #storing it
4482: &Apache::lonnet::cstore(\%hash);
4483:
4484: #changing a value
4485: $hash{'foo'}='notbar';
4486:
4487: #adding a new value
4488: $hash{'bar'}='foo';
4489: &Apache::lonnet::cstore(\%hash);
4490:
4491: #retrieving the hash
4492: my %history=&Apache::lonnet::restore();
4493:
4494: #print the hash
4495: foreach my $key (sort(keys(%history))) {
4496: print("\%history{$key} = $history{$key}");
4497: }
4498:
4499: Will print out:
4500:
4501: %history{1:foo} = bar
4502: %history{1:keys} = foo:timestamp
4503: %history{1:timestamp} = 990455579
4504: %history{2:bar} = foo
4505: %history{2:foo} = notbar
4506: %history{2:keys} = foo:bar:timestamp
4507: %history{2:timestamp} = 990455580
4508: %history{bar} = foo
4509: %history{foo} = notbar
4510: %history{timestamp} = 990455580
4511: %history{version} = 2
4512:
4513: Note that the special hash entries C<keys>, C<version> and
4514: C<timestamp> were added to the hash. C<version> will be equal to the
4515: total number of versions of the data that have been stored. The
4516: C<timestamp> attribute will be the UNIX time the hash was
4517: stored. C<keys> is available in every historical section to list which
4518: keys were added or changed at a specific historical revision of a
4519: hash.
4520:
4521: B<Warning>: do not store the hash that restore returns directly. This
4522: will cause a mess since it will restore the historical keys as if the
4523: were new keys. I.E. 1:foo will become 1:1:foo etc.
4524:
4525: Calling convention:
4526:
4527: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
4528: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
4529:
4530: For more detailed information, see lonnet specific documentation.
4531:
4532: =head1 RETURN MESSAGES
4533:
4534: =over 4
4535:
4536: =item * B<con_lost>: unable to contact remote host
4537:
4538: =item * B<con_delayed>: unable to contact remote host, message will be delivered
4539: when the connection is brought back up
4540:
4541: =item * B<con_failed>: unable to contact remote host and unable to save message
4542: for later delivery
4543:
4544: =item * B<error:>: an error a occured, a description of the error follows the :
4545:
4546: =item * B<no_such_host>: unable to fund a host associated with the user/domain
4547: that was requested
4548:
4549: =back
4550:
4551: =head1 PUBLIC SUBROUTINES
4552:
4553: =head2 Session Environment Functions
4554:
4555: =over 4
4556:
4557: =item *
4558: X<appenv()>
4559: B<appenv(%hash)>: the value of %hash is written to
4560: the user envirnoment file, and will be restored for each access this
4561: user makes during this session, also modifies the %ENV for the current
4562: process
4563:
4564: =item *
4565: X<delenv()>
4566: B<delenv($regexp)>: removes all items from the session
4567: environment file that matches the regular expression in $regexp. The
4568: values are also delted from the current processes %ENV.
4569:
4570: =back
4571:
4572: =head2 User Information
4573:
4574: =over 4
4575:
4576: =item *
4577: X<queryauthenticate()>
4578: B<queryauthenticate($uname,$udom)>: try to determine user's current
4579: authentication scheme
4580:
4581: =item *
4582: X<authenticate()>
4583: B<authenticate($uname,$upass,$udom)>: try to
4584: authenticate user from domain's lib servers (first use the current
4585: one). C<$upass> should be the users password.
4586:
4587: =item *
4588: X<homeserver()>
4589: B<homeserver($uname,$udom)>: find the server which has
4590: the user's directory and files (there must be only one), this caches
4591: the answer, and also caches if there is a borken connection.
4592:
4593: =item *
4594: X<idget()>
4595: B<idget($udom,@ids)>: find the usernames behind a list of IDs
4596: (IDs are a unique resource in a domain, there must be only 1 ID per
4597: username, and only 1 username per ID in a specific domain) (returns
4598: hash: id=>name,id=>name)
4599:
4600: =item *
4601: X<idrget()>
4602: B<idrget($udom,@unames)>: find the IDs behind a list of
4603: usernames (returns hash: name=>id,name=>id)
4604:
4605: =item *
4606: X<idput()>
4607: B<idput($udom,%ids)>: store away a list of names and associated IDs
4608:
4609: =item *
4610: X<rolesinit()>
4611: B<rolesinit($udom,$username,$authhost)>: get user privileges
4612:
4613: =item *
4614: X<usection()>
4615: B<usection($udom,$uname,$cname)>: finds the section of student in the
4616: course $cname, return section name/number or '' for "not in course"
4617: and '-1' for "no section"
4618:
4619: =item *
4620: X<userenvironment()>
4621: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
4622: passed in @what from the requested user's environment, returns a hash
4623:
4624: =back
4625:
4626: =head2 User Roles
4627:
4628: =over 4
4629:
4630: =item *
4631:
4632: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
4633: actions
4634: F: full access
4635: U,I,K: authentication modes (cxx only)
4636: '': forbidden
4637: 1: user needs to choose course
4638: 2: browse allowed
4639:
4640: =item *
4641:
4642: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4643: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4644: and course level
4645:
4646: =item *
4647:
4648: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4649: explanation of a user role term
4650:
4651: =back
4652:
4653: =head2 User Modification
4654:
4655: =over 4
4656:
4657: =item *
4658:
4659: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4660: user for the level given by URL. Optional start and end dates (leave empty
4661: string or zero for "no date")
4662:
4663: =item *
4664:
4665: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4666: change a users, password, possible return values are: ok,
4667: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4668: refused
4669:
4670: =item *
4671:
4672: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
4673:
4674: =item *
4675:
4676: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4677: modify user
4678:
4679: =item *
4680:
4681: modifystudent
4682:
4683: modify a students enrollment and identification information.
4684: The course id is resolved based on the current users environment.
4685: This means the envoking user must be a course coordinator or otherwise
4686: associated with a course.
4687:
4688: This call is essentially a wrapper for lonnet::modifyuser and
4689: lonnet::modify_student_enrollment
4690:
4691: Inputs:
4692:
4693: =over 4
4694:
4695: =item B<$udom> Students loncapa domain
4696:
4697: =item B<$uname> Students loncapa login name
4698:
4699: =item B<$uid> Students id/student number
4700:
4701: =item B<$umode> Students authentication mode
4702:
4703: =item B<$upass> Students password
4704:
4705: =item B<$first> Students first name
4706:
4707: =item B<$middle> Students middle name
4708:
4709: =item B<$last> Students last name
4710:
4711: =item B<$gene> Students generation
4712:
4713: =item B<$usec> Students section in course
4714:
4715: =item B<$end> Unix time of the roles expiration
4716:
4717: =item B<$start> Unix time of the roles start date
4718:
4719: =item B<$forceid> If defined, allow $uid to be changed
4720:
4721: =item B<$desiredhome> server to use as home server for student
4722:
4723: =back
4724:
4725: =item *
4726:
4727: modify_student_enrollment
4728:
4729: Change a students enrollment status in a class. The environment variable
4730: 'role.request.course' must be defined for this function to proceed.
4731:
4732: Inputs:
4733:
4734: =over 4
4735:
4736: =item $udom, students domain
4737:
4738: =item $uname, students name
4739:
4740: =item $uid, students user id
4741:
4742: =item $first, students first name
4743:
4744: =item $middle
4745:
4746: =item $last
4747:
4748: =item $gene
4749:
4750: =item $usec
4751:
4752: =item $end
4753:
4754: =item $start
4755:
4756: =back
4757:
4758:
4759: =item *
4760:
4761: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4762: custom role; give a custom role to a user for the level given by URL. Specify
4763: name and domain of role author, and role name
4764:
4765: =item *
4766:
4767: revokerole($udom,$uname,$url,$role) : revoke a role for url
4768:
4769: =item *
4770:
4771: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4772:
4773: =back
4774:
4775: =head2 Course Infomation
4776:
4777: =over 4
4778:
4779: =item *
4780:
4781: coursedescription($courseid) : course description
4782:
4783: =item *
4784:
4785: courseresdata($coursenum,$coursedomain,@which) : request for current
4786: parameter setting for a specific course, @what should be a list of
4787: parameters to ask about. This routine caches answers for 5 minutes.
4788:
4789: =back
4790:
4791: =head2 Course Modification
4792:
4793: =over 4
4794:
4795: =item *
4796:
4797: writecoursepref($courseid,%prefs) : write preferences (environment
4798: database) for a course
4799:
4800: =item *
4801:
4802: createcourse($udom,$description,$url) : make/modify course
4803:
4804: =back
4805:
4806: =head2 Resource Subroutines
4807:
4808: =over 4
4809:
4810: =item *
4811:
4812: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
4813:
4814: =item *
4815:
4816: repcopy($filename) : subscribes to the requested file, and attempts to
4817: replicate from the owning library server, Might return
4818: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4819: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4820: resource. Expects the local filesystem pathname
4821: (/home/httpd/html/res/....)
4822:
4823: =back
4824:
4825: =head2 Resource Information
4826:
4827: =over 4
4828:
4829: =item *
4830:
4831: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4832: a vairety of different possible values, $varname should be a request
4833: string, and the other parameters can be used to specify who and what
4834: one is asking about.
4835:
4836: Possible values for $varname are environment.lastname (or other item
4837: from the envirnment hash), user.name (or someother aspect about the
4838: user), resource.0.maxtries (or some other part and parameter of a
4839: resource)
4840:
4841: =item *
4842:
4843: directcondval($number) : get current value of a condition; reads from a state
4844: string
4845:
4846: =item *
4847:
4848: condval($condidx) : value of condition index based on state
4849:
4850: =item *
4851:
4852: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4853: resource's metadata, $what should be either a specific key, or either
4854: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4855: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4856:
4857: this function automatically caches all requests
4858:
4859: =item *
4860:
4861: metadata_query($query,$custom,$customshow) : make a metadata query against the
4862: network of library servers; returns file handle of where SQL and regex results
4863: will be stored for query
4864:
4865: =item *
4866:
4867: symbread($filename) : return symbolic list entry (filename argument optional);
4868: returns the data handle
4869:
4870: =item *
4871:
4872: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4873: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4874: failure, user must be in a course, as it assumes the existance of the
4875: course initi hash, and uses $ENV('request.course.id'}
4876:
4877:
4878: =item *
4879:
4880: symbclean($symb) : removes versions numbers from a symb, returns the
4881: cleaned symb
4882:
4883: =item *
4884:
4885: is_on_map($uri) : checks if the $uri is somewhere on the current
4886: course map, user must be in a course for it to work.
4887:
4888: =item *
4889:
4890: numval($salt) : return random seed value (addend for rndseed)
4891:
4892: =item *
4893:
4894: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4895: a random seed, all arguments are optional, if they aren't sent it uses the
4896: environment to derive them. Note: if symb isn't sent and it can't get one
4897: from &symbread it will use the current time as its return value
4898:
4899: =item *
4900:
4901: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4902: unfakeable, receipt
4903:
4904: =item *
4905:
4906: receipt() : API to ireceipt working off of ENV values; given out to users
4907:
4908: =item *
4909:
4910: countacc($url) : count the number of accesses to a given URL
4911:
4912: =item *
4913:
4914: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4915:
4916: =item *
4917:
4918: checkin($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 $tcrsid)
4919:
4920: =item *
4921:
4922: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4923:
4924: =item *
4925:
4926: devalidate($symb) : devalidate temporary spreadsheet calculations,
4927: forcing spreadsheet to reevaluate the resource scores next time.
4928:
4929: =back
4930:
4931: =head2 Storing/Retreiving Data
4932:
4933: =over 4
4934:
4935: =item *
4936:
4937: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4938: for this url; hashref needs to be given and should be a \%hashname; the
4939: remaining args aren't required and if they aren't passed or are '' they will
4940: be derived from the ENV
4941:
4942: =item *
4943:
4944: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4945: uses critical subroutine
4946:
4947: =item *
4948:
4949: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4950: all args are optional
4951:
4952: =item *
4953:
4954: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4955: works very similar to store/cstore, but all data is stored in a
4956: temporary location and can be reset using tmpreset, $storehash should
4957: be a hash reference, returns nothing on success
4958:
4959: =item *
4960:
4961: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4962: similar to restore, but all data is stored in a temporary location and
4963: can be reset using tmpreset. Returns a hash of values on success,
4964: error string otherwise.
4965:
4966: =item *
4967:
4968: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4969: deltes all keys for $symb form the temporary storage hash.
4970:
4971: =item *
4972:
4973: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4974: reference filled in from namesp ($udom and $uname are optional)
4975:
4976: =item *
4977:
4978: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4979: namesp ($udom and $uname are optional)
4980:
4981: =item *
4982:
4983: dump($namespace,$udom,$uname,$regexp) :
4984: dumps the complete (or key matching regexp) namespace into a hash
4985: ($udom, $uname and $regexp are optional)
4986:
4987: =item *
4988:
4989: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4990: ($udom and $uname are optional)
4991:
4992: =item *
4993:
4994: cput($namespace,$storehash,$udom,$uname) : critical put
4995: ($udom and $uname are optional)
4996:
4997: =item *
4998:
4999: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5000: reference filled in from namesp (encrypts the return communication)
5001: ($udom and $uname are optional)
5002:
5003: =item *
5004:
5005: log($udom,$name,$home,$message) : write to permanent log for user; use
5006: critical subroutine
5007:
5008: =back
5009:
5010: =head2 Network Status Functions
5011:
5012: =over 4
5013:
5014: =item *
5015:
5016: dirlist($uri) : return directory list based on URI
5017:
5018: =item *
5019:
5020: spareserver() : find server with least workload from spare.tab
5021:
5022: =back
5023:
5024: =head2 Apache Request
5025:
5026: =over 4
5027:
5028: =item *
5029:
5030: ssi($url,%hash) : server side include, does a complete request cycle on url to
5031: localhost, posts hash
5032:
5033: =back
5034:
5035: =head2 Data to String to Data
5036:
5037: =over 4
5038:
5039: =item *
5040:
5041: hash2str(%hash) : convert a hash into a string complete with escaping and '='
5042: and '&' separators, supports elements that are arrayrefs and hashrefs
5043:
5044: =item *
5045:
5046: hashref2str($hashref) : convert a hashref into a string complete with
5047: escaping and '=' and '&' separators, supports elements that are
5048: arrayrefs and hashrefs
5049:
5050: =item *
5051:
5052: arrayref2str($arrayref) : convert an arrayref into a string complete
5053: with escaping and '&' separators, supports elements that are arrayrefs
5054: and hashrefs
5055:
5056: =item *
5057:
5058: str2hash($string) : convert string to hash using unescaping and
5059: splitting on '=' and '&', supports elements that are arrayrefs and
5060: hashrefs
5061:
5062: =item *
5063:
5064: str2array($string) : convert string to hash using unescaping and
5065: splitting on '&', supports elements that are arrayrefs and hashrefs
5066:
5067: =back
5068:
5069: =head2 Logging Routines
5070:
5071: =over 4
5072:
5073: These routines allow one to make log messages in the lonnet.log and
5074: lonnet.perm logfiles.
5075:
5076: =item *
5077:
5078: logtouch() : make sure the logfile, lonnet.log, exists
5079:
5080: =item *
5081:
5082: logthis() : append message to the normal lonnet.log file, it gets
5083: preiodically rolled over and deleted.
5084:
5085: =item *
5086:
5087: logperm() : append a permanent message to lonnet.perm.log, this log
5088: file never gets deleted by any automated portion of the system, only
5089: messages of critical importance should go in here.
5090:
5091: =back
5092:
5093: =head2 General File Helper Routines
5094:
5095: =over 4
5096:
5097: =item *
5098:
5099: getfile($file) : returns the entire contents of a file or -1; it
5100: properly subscribes to and replicates the file if neccessary.
5101:
5102: =item *
5103:
5104: filelocation($dir,$file) : returns file system location of a file
5105: based on URI; meant to be "fairly clean" absolute reference, $dir is a
5106: directory that relative $file lookups are to looked in ($dir of /a/dir
5107: and a file of ../bob will become /a/bob)
5108:
5109: =item *
5110:
5111: hreflocation($dir,$file) : returns file system location or a URL; same as
5112: filelocation except for hrefs
5113:
5114: =item *
5115:
5116: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
5117:
5118: =back
5119:
5120: =head2 HTTP Helper Routines
5121:
5122: =over 4
5123:
5124: =item *
5125:
5126: escape() : unpack non-word characters into CGI-compatible hex codes
5127:
5128: =item *
5129:
5130: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
5131:
5132: =back
5133:
5134: =head1 PRIVATE SUBROUTINES
5135:
5136: =head2 Underlying communication routines (Shouldn't call)
5137:
5138: =over 4
5139:
5140: =item *
5141:
5142: subreply() : tries to pass a message to lonc, returns con_lost if incapable
5143:
5144: =item *
5145:
5146: reply() : uses subreply to send a message to remote machine, logs all failures
5147:
5148: =item *
5149:
5150: critical() : passes a critical message to another server; if cannot
5151: get through then place message in connection buffer directory and
5152: returns con_delayed, if incapable of saving message, returns
5153: con_failed
5154:
5155: =item *
5156:
5157: reconlonc() : tries to reconnect lonc client processes.
5158:
5159: =back
5160:
5161: =head2 Resource Access Logging
5162:
5163: =over 4
5164:
5165: =item *
5166:
5167: flushcourselogs() : flush (save) buffer logs and access logs
5168:
5169: =item *
5170:
5171: courselog($what) : save message for course in hash
5172:
5173: =item *
5174:
5175: courseacclog($what) : save message for course using &courselog(). Perform
5176: special processing for specific resource types (problems, exams, quizzes, etc).
5177:
5178: =item *
5179:
5180: goodbye() : flush course logs and log shutting down; it is called in srm.conf
5181: as a PerlChildExitHandler
5182:
5183: =back
5184:
5185: =head2 Other
5186:
5187: =over 4
5188:
5189: =item *
5190:
5191: symblist($mapname,%newhash) : update symbolic storage links
5192:
5193: =back
5194:
5195: =cut
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