1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.423 2003/09/25 20:02:54 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: %userresdatacache %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 (!$time) { $time=300; }
860: if (!exists($$cache{$id.'.time'})) {
861: return (undef,undef);
862: } else {
863: if (time-$$cache{$id.'.time'}>$time) {
864: &devalidate_cache($cache,$id);
865: return (undef,undef);
866: }
867: }
868: return ($$cache{$id},1);
869: }
870:
871: sub do_cache {
872: my ($cache,$id,$value) = @_;
873: $$cache{$id.'.time'}=time;
874: # do_cache implictly return the set value
875: $$cache{$id}=$value;
876: }
877:
878: sub usection {
879: my ($udom,$unam,$courseid)=@_;
880: my $hashid="$udom:$unam:$courseid";
881:
882: my ($result,$cached)=&is_cached(\%usectioncache,$hashid);
883: if (defined($cached)) { return $result; }
884: $courseid=~s/\_/\//g;
885: $courseid=~s/^(\w)/\/$1/;
886: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
887: &homeserver($unam,$udom)))) {
888: my ($key,$value)=split(/\=/,$_);
889: $key=&unescape($key);
890: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
891: my $section=$1;
892: if ($key eq $courseid.'_st') { $section=''; }
893: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
894: my $now=time;
895: my $notactive=0;
896: if ($start) {
897: if ($now<$start) { $notactive=1; }
898: }
899: if ($end) {
900: if ($now>$end) { $notactive=1; }
901: }
902: unless ($notactive) {
903: return &do_cache(\%usectioncache,$hashid,$section);
904: }
905: }
906: }
907: return &do_cache(\%usectioncache,$hashid,'-1');
908: }
909:
910: # ------------------------------------- Read an entry from a user's environment
911:
912: sub userenvironment {
913: my ($udom,$unam,@what)=@_;
914: my %returnhash=();
915: my @answer=split(/\&/,
916: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
917: &homeserver($unam,$udom)));
918: my $i;
919: for ($i=0;$i<=$#what;$i++) {
920: $returnhash{$what[$i]}=&unescape($answer[$i]);
921: }
922: return %returnhash;
923: }
924:
925: # -------------------------------------------------------------------- New chat
926:
927: sub chatsend {
928: my ($newentry,$anon)=@_;
929: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
930: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
931: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
932: &reply('chatsend:'.$cdom.':'.$cnum.':'.
933: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
934: &escape($newentry)),$chome);
935: }
936:
937: # ------------------------------------------ Find current version of a resource
938:
939: sub getversion {
940: my $fname=&clutter(shift);
941: unless ($fname=~/^\/res\//) { return -1; }
942: return ¤tversion(&filelocation('',$fname));
943: }
944:
945: sub currentversion {
946: my $fname=shift;
947: my $author=$fname;
948: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
949: my ($udom,$uname)=split(/\//,$author);
950: my $home=homeserver($uname,$udom);
951: if ($home eq 'no_host') {
952: return -1;
953: }
954: my $answer=reply("currentversion:$fname",$home);
955: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
956: return -1;
957: }
958: return $answer;
959: }
960:
961: # ----------------------------- Subscribe to a resource, return URL if possible
962:
963: sub subscribe {
964: my $fname=shift;
965: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
966: my $author=$fname;
967: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
968: my ($udom,$uname)=split(/\//,$author);
969: my $home=homeserver($uname,$udom);
970: if ($home eq 'no_host') {
971: return 'not_found';
972: }
973: my $answer=reply("sub:$fname",$home);
974: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
975: $answer.=' by '.$home;
976: }
977: return $answer;
978: }
979:
980: # -------------------------------------------------------------- Replicate file
981:
982: sub repcopy {
983: my $filename=shift;
984: $filename=~s/\/+/\//g;
985: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
986: my $transname="$filename.in.transfer";
987: if ((-e $filename) || (-e $transname)) { return OK; }
988: my $remoteurl=subscribe($filename);
989: if ($remoteurl =~ /^con_lost by/) {
990: &logthis("Subscribe returned $remoteurl: $filename");
991: return HTTP_SERVICE_UNAVAILABLE;
992: } elsif ($remoteurl eq 'not_found') {
993: &logthis("Subscribe returned not_found: $filename");
994: return HTTP_NOT_FOUND;
995: } elsif ($remoteurl =~ /^rejected by/) {
996: &logthis("Subscribe returned $remoteurl: $filename");
997: return FORBIDDEN;
998: } elsif ($remoteurl eq 'directory') {
999: return OK;
1000: } else {
1001: my $author=$filename;
1002: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1003: my ($udom,$uname)=split(/\//,$author);
1004: my $home=homeserver($uname,$udom);
1005: unless ($home eq $perlvar{'lonHostID'}) {
1006: my @parts=split(/\//,$filename);
1007: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1008: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1009: &logthis("Malconfiguration for replication: $filename");
1010: return HTTP_BAD_REQUEST;
1011: }
1012: my $count;
1013: for ($count=5;$count<$#parts;$count++) {
1014: $path.="/$parts[$count]";
1015: if ((-e $path)!=1) {
1016: mkdir($path,0777);
1017: }
1018: }
1019: my $ua=new LWP::UserAgent;
1020: my $request=new HTTP::Request('GET',"$remoteurl");
1021: my $response=$ua->request($request,$transname);
1022: if ($response->is_error()) {
1023: unlink($transname);
1024: my $message=$response->status_line;
1025: &logthis("<font color=blue>WARNING:"
1026: ." LWP get: $message: $filename</font>");
1027: return HTTP_SERVICE_UNAVAILABLE;
1028: } else {
1029: if ($remoteurl!~/\.meta$/) {
1030: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1031: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1032: if ($mresponse->is_error()) {
1033: unlink($filename.'.meta');
1034: &logthis(
1035: "<font color=yellow>INFO: No metadata: $filename</font>");
1036: }
1037: }
1038: rename($transname,$filename);
1039: return OK;
1040: }
1041: }
1042: }
1043: }
1044:
1045: # ------------------------------------------------ Get server side include body
1046: sub ssi_body {
1047: my ($filelink,%form)=@_;
1048: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1049: &ssi($filelink,%form));
1050: $output=~s/^.*\<body[^\>]*\>//si;
1051: $output=~s/\<\/body\s*\>.*$//si;
1052: $output=~
1053: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1054: return $output;
1055: }
1056:
1057: # --------------------------------------------------------- Server Side Include
1058:
1059: sub ssi {
1060:
1061: my ($fn,%form)=@_;
1062:
1063: my $ua=new LWP::UserAgent;
1064:
1065: my $request;
1066:
1067: if (%form) {
1068: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1069: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1070: } else {
1071: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1072: }
1073:
1074: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1075: my $response=$ua->request($request);
1076:
1077: return $response->content;
1078: }
1079:
1080: sub externalssi {
1081: my ($url)=@_;
1082: my $ua=new LWP::UserAgent;
1083: my $request=new HTTP::Request('GET',$url);
1084: my $response=$ua->request($request);
1085: return $response->content;
1086: }
1087:
1088: # ------- Add a token to a remote URI's query string to vouch for access rights
1089:
1090: sub tokenwrapper {
1091: my $uri=shift;
1092: $uri=~s/^http\:\/\/([^\/]+)//;
1093: $uri=~s/^\///;
1094: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
1095: my $token=$1;
1096: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
1097: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
1098: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
1099: (($uri=~/\?/)?'&':'?').'token='.$token.
1100: '&tokenissued='.$perlvar{'lonHostID'};
1101: } else {
1102: return '/adm/notfound.html';
1103: }
1104: }
1105:
1106: # --------------- Take an uploaded file and put it into the userfiles directory
1107: # input: name of form element, coursedoc=1 means this is for the course
1108: # output: url of file in userspace
1109:
1110: sub userfileupload {
1111: my ($formname,$coursedoc)=@_;
1112: my $fname=$ENV{'form.'.$formname.'.filename'};
1113: # Replace Windows backslashes by forward slashes
1114: $fname=~s/\\/\//g;
1115: # Get rid of everything but the actual filename
1116: $fname=~s/^.*\/([^\/]+)$/$1/;
1117: # Replace spaces by underscores
1118: $fname=~s/\s+/\_/g;
1119: # Replace all other weird characters by nothing
1120: $fname=~s/[^\w\.\-]//g;
1121: # See if there is anything left
1122: unless ($fname) { return 'error: no uploaded file'; }
1123: chop($ENV{'form.'.$formname});
1124: # Create the directory if not present
1125: my $docuname='';
1126: my $docudom='';
1127: my $docuhome='';
1128: if ($coursedoc) {
1129: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1130: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1131: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1132: } else {
1133: $docuname=$ENV{'user.name'};
1134: $docudom=$ENV{'user.domain'};
1135: $docuhome=$ENV{'user.home'};
1136: }
1137: return
1138: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1139: }
1140:
1141: sub finishuserfileupload {
1142: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1143: my $path=$docudom.'/'.$docuname.'/';
1144: my $filepath=$perlvar{'lonDocRoot'};
1145: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1146: my $count;
1147: for ($count=4;$count<=$#parts;$count++) {
1148: $filepath.="/$parts[$count]";
1149: if ((-e $filepath)!=1) {
1150: mkdir($filepath,0777);
1151: }
1152: }
1153: # Save the file
1154: {
1155: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
1156: print $fh $ENV{'form.'.$formname};
1157: }
1158: # Notify homeserver to grep it
1159: #
1160:
1161: my $fetchresult=
1162: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
1163: if ($fetchresult eq 'ok') {
1164: #
1165: # Return the URL to it
1166: return '/uploaded/'.$path.$fname;
1167: } else {
1168: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1169: ' to host '.$docuhome.': '.$fetchresult);
1170: return '/adm/notfound.html';
1171: }
1172: }
1173:
1174: # ------------------------------------------------------------------------- Log
1175:
1176: sub log {
1177: my ($dom,$nam,$hom,$what)=@_;
1178: return critical("log:$dom:$nam:$what",$hom);
1179: }
1180:
1181: # ------------------------------------------------------------------ Course Log
1182: #
1183: # This routine flushes several buffers of non-mission-critical nature
1184: #
1185:
1186: sub flushcourselogs {
1187: &logthis('Flushing log buffers');
1188: #
1189: # course logs
1190: # This is a log of all transactions in a course, which can be used
1191: # for data mining purposes
1192: #
1193: # It also collects the courseid database, which lists last transaction
1194: # times and course titles for all courseids
1195: #
1196: my %courseidbuffer=();
1197: foreach (keys %courselogs) {
1198: my $crsid=$_;
1199: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1200: &escape($courselogs{$crsid}),
1201: $coursehombuf{$crsid}) eq 'ok') {
1202: delete $courselogs{$crsid};
1203: } else {
1204: &logthis('Failed to flush log buffer for '.$crsid);
1205: if (length($courselogs{$crsid})>40000) {
1206: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1207: " exceeded maximum size, deleting.</font>");
1208: delete $courselogs{$crsid};
1209: }
1210: }
1211: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1212: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1213: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1214: } else {
1215: $courseidbuffer{$coursehombuf{$crsid}}=
1216: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1217: }
1218: }
1219: #
1220: # Write course id database (reverse lookup) to homeserver of courses
1221: # Is used in pickcourse
1222: #
1223: foreach (keys %courseidbuffer) {
1224: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1225: }
1226: #
1227: # File accesses
1228: # Writes to the dynamic metadata of resources to get hit counts, etc.
1229: #
1230: foreach (keys %accesshash) {
1231: my $entry=$_;
1232: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
1233: my %temphash=($entry => $accesshash{$entry});
1234: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
1235: delete $accesshash{$entry};
1236: }
1237: }
1238: #
1239: # Roles
1240: # Reverse lookup of user roles for course faculty/staff and co-authorship
1241: #
1242: foreach (keys %userrolehash) {
1243: my $entry=$_;
1244: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1245: split(/\:/,$entry);
1246: if (&Apache::lonnet::put('nohist_userroles',
1247: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1248: $rudom,$runame) eq 'ok') {
1249: delete $userrolehash{$entry};
1250: }
1251: }
1252: $dumpcount++;
1253: }
1254:
1255: sub courselog {
1256: my $what=shift;
1257: $what=time.':'.$what;
1258: unless ($ENV{'request.course.id'}) { return ''; }
1259: $coursedombuf{$ENV{'request.course.id'}}=
1260: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1261: $coursenumbuf{$ENV{'request.course.id'}}=
1262: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1263: $coursehombuf{$ENV{'request.course.id'}}=
1264: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1265: $coursedescrbuf{$ENV{'request.course.id'}}=
1266: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1267: if (defined $courselogs{$ENV{'request.course.id'}}) {
1268: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1269: } else {
1270: $courselogs{$ENV{'request.course.id'}}.=$what;
1271: }
1272: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1273: &flushcourselogs();
1274: }
1275: }
1276:
1277: sub courseacclog {
1278: my $fnsymb=shift;
1279: unless ($ENV{'request.course.id'}) { return ''; }
1280: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1281: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1282: $what.=':POST';
1283: foreach (keys %ENV) {
1284: if ($_=~/^form\.(.*)/) {
1285: $what.=':'.$1.'='.$ENV{$_};
1286: }
1287: }
1288: }
1289: &courselog($what);
1290: }
1291:
1292: sub countacc {
1293: my $url=&declutter(shift);
1294: unless ($ENV{'request.course.id'}) { return ''; }
1295: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1296: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1297: if (defined($accesshash{$key})) {
1298: $accesshash{$key}++;
1299: } else {
1300: $accesshash{$key}=1;
1301: }
1302: }
1303:
1304: sub linklog {
1305: my ($from,$to)=@_;
1306: $from=&declutter($from);
1307: $to=&declutter($to);
1308: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1309: $accesshash{$to.'___'.$from.'___goto'}=1;
1310: }
1311:
1312: sub userrolelog {
1313: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1314: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1315: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1316: ($trole=~/^cr/)) {
1317: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1318: $userrolehash
1319: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1320: =$tend.':'.$tstart;
1321: }
1322: }
1323:
1324: sub get_course_adv_roles {
1325: my $cid=shift;
1326: $cid=$ENV{'request.course.id'} unless (defined($cid));
1327: my %coursehash=&coursedescription($cid);
1328: my %returnhash=();
1329: my %dumphash=
1330: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1331: my $now=time;
1332: foreach (keys %dumphash) {
1333: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1334: if (($tstart) && ($tstart<0)) { next; }
1335: if (($tend) && ($tend<$now)) { next; }
1336: if (($tstart) && ($now<$tstart)) { next; }
1337: my ($role,$username,$domain,$section)=split(/\:/,$_);
1338: my $key=&plaintext($role);
1339: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1340: if ($returnhash{$key}) {
1341: $returnhash{$key}.=','.$username.':'.$domain;
1342: } else {
1343: $returnhash{$key}=$username.':'.$domain;
1344: }
1345: }
1346: return %returnhash;
1347: }
1348:
1349: sub get_my_roles {
1350: my ($uname,$udom)=@_;
1351: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1352: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1353: my %dumphash=
1354: &dump('nohist_userroles',$udom,$uname);
1355: my %returnhash=();
1356: my $now=time;
1357: foreach (keys %dumphash) {
1358: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1359: if (($tstart) && ($tstart<0)) { next; }
1360: if (($tend) && ($tend<$now)) { next; }
1361: if (($tstart) && ($now<$tstart)) { next; }
1362: my ($role,$username,$domain,$section)=split(/\:/,$_);
1363: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1364: }
1365: return %returnhash;
1366: }
1367:
1368: # ----------------------------------------------------- Frontpage Announcements
1369: #
1370: #
1371:
1372: sub postannounce {
1373: my ($server,$text)=@_;
1374: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1375: unless ($text=~/\w/) { $text=''; }
1376: return &reply('setannounce:'.&escape($text),$server);
1377: }
1378:
1379: sub getannounce {
1380: if (my $fh=Apache::File->new($perlvar{'lonDocRoot'}.'/announcement.txt')) {
1381: my $announcement='';
1382: while (<$fh>) { $announcement .=$_; }
1383: $fh->close();
1384: if ($announcement=~/\w/) {
1385: return
1386: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1387: '<tr><td bgcolor="#FFFFFF"><pre>'.$announcement.'</pre></td></tr></table>';
1388: } else {
1389: return '';
1390: }
1391: } else {
1392: return '';
1393: }
1394: }
1395:
1396: # ---------------------------------------------------------- Course ID routines
1397: # Deal with domain's nohist_courseid.db files
1398: #
1399:
1400: sub courseidput {
1401: my ($domain,$what,$coursehome)=@_;
1402: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1403: }
1404:
1405: sub courseiddump {
1406: my ($domfilter,$descfilter,$sincefilter)=@_;
1407: my %returnhash=();
1408: unless ($domfilter) { $domfilter=''; }
1409: foreach my $tryserver (keys %libserv) {
1410: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1411: foreach (
1412: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1413: $sincefilter.':'.&escape($descfilter),
1414: $tryserver))) {
1415: my ($key,$value)=split(/\=/,$_);
1416: if (($key) && ($value)) {
1417: $returnhash{&unescape($key)}=&unescape($value);
1418: }
1419: }
1420:
1421: }
1422: }
1423: return %returnhash;
1424: }
1425:
1426: #
1427: # ----------------------------------------------------------- Check out an item
1428:
1429: sub checkout {
1430: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1431: my $now=time;
1432: my $lonhost=$perlvar{'lonHostID'};
1433: my $infostr=&escape(
1434: 'CHECKOUTTOKEN&'.
1435: $tuname.'&'.
1436: $tudom.'&'.
1437: $tcrsid.'&'.
1438: $symb.'&'.
1439: $now.'&'.$ENV{'REMOTE_ADDR'});
1440: my $token=&reply('tmpput:'.$infostr,$lonhost);
1441: if ($token=~/^error\:/) {
1442: &logthis("<font color=blue>WARNING: ".
1443: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1444: "</font>");
1445: return '';
1446: }
1447:
1448: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1449: $token=~tr/a-z/A-Z/;
1450:
1451: my %infohash=('resource.0.outtoken' => $token,
1452: 'resource.0.checkouttime' => $now,
1453: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1454:
1455: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1456: return '';
1457: } else {
1458: &logthis("<font color=blue>WARNING: ".
1459: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1460: "</font>");
1461: }
1462:
1463: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1464: &escape('Checkout '.$infostr.' - '.
1465: $token)) ne 'ok') {
1466: return '';
1467: } else {
1468: &logthis("<font color=blue>WARNING: ".
1469: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1470: "</font>");
1471: }
1472: return $token;
1473: }
1474:
1475: # ------------------------------------------------------------ Check in an item
1476:
1477: sub checkin {
1478: my $token=shift;
1479: my $now=time;
1480: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1481: $lonhost=~tr/A-Z/a-z/;
1482: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1483: $dtoken=~s/\W/\_/g;
1484: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1485: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1486:
1487: unless (($tuname) && ($tudom)) {
1488: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1489: return '';
1490: }
1491:
1492: unless (&allowed('mgr',$tcrsid)) {
1493: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1494: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1495: return '';
1496: }
1497:
1498: my %infohash=('resource.0.intoken' => $token,
1499: 'resource.0.checkintime' => $now,
1500: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1501:
1502: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1503: return '';
1504: }
1505:
1506: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1507: &escape('Checkin - '.$token)) ne 'ok') {
1508: return '';
1509: }
1510:
1511: return ($symb,$tuname,$tudom,$tcrsid);
1512: }
1513:
1514: # --------------------------------------------- Set Expire Date for Spreadsheet
1515:
1516: sub expirespread {
1517: my ($uname,$udom,$stype,$usymb)=@_;
1518: my $cid=$ENV{'request.course.id'};
1519: if ($cid) {
1520: my $now=time;
1521: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1522: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1523: $ENV{'course.'.$cid.'.num'}.
1524: ':nohist_expirationdates:'.
1525: &escape($key).'='.$now,
1526: $ENV{'course.'.$cid.'.home'})
1527: }
1528: return 'ok';
1529: }
1530:
1531: # ----------------------------------------------------- Devalidate Spreadsheets
1532:
1533: sub devalidate {
1534: my ($symb,$uname,$udom)=@_;
1535: my $cid=$ENV{'request.course.id'};
1536: if ($cid) {
1537: # delete the stored spreadsheets for
1538: # - the student level sheet of this user in course's homespace
1539: # - the assessment level sheet for this resource
1540: # for this user in user's homespace
1541: my $key=$uname.':'.$udom.':';
1542: my $status=
1543: &del('nohist_calculatedsheets',
1544: [$key.'studentcalc:'],
1545: $ENV{'course.'.$cid.'.domain'},
1546: $ENV{'course.'.$cid.'.num'})
1547: .' '.
1548: &del('nohist_calculatedsheets_'.$cid,
1549: [$key.'assesscalc:'.$symb],$udom,$uname);
1550: unless ($status eq 'ok ok') {
1551: &logthis('Could not devalidate spreadsheet '.
1552: $uname.' at '.$udom.' for '.
1553: $symb.': '.$status);
1554: }
1555: }
1556: }
1557:
1558: sub get_scalar {
1559: my ($string,$end) = @_;
1560: my $value;
1561: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1562: $value = $1;
1563: } elsif ($$string =~ s/^([^&]*?)&//) {
1564: $value = $1;
1565: }
1566: return &unescape($value);
1567: }
1568:
1569: sub array2str {
1570: my (@array) = @_;
1571: my $result=&arrayref2str(\@array);
1572: $result=~s/^__ARRAY_REF__//;
1573: $result=~s/__END_ARRAY_REF__$//;
1574: return $result;
1575: }
1576:
1577: sub arrayref2str {
1578: my ($arrayref) = @_;
1579: my $result='__ARRAY_REF__';
1580: foreach my $elem (@$arrayref) {
1581: if(ref($elem) eq 'ARRAY') {
1582: $result.=&arrayref2str($elem).'&';
1583: } elsif(ref($elem) eq 'HASH') {
1584: $result.=&hashref2str($elem).'&';
1585: } elsif(ref($elem)) {
1586: #print("Got a ref of ".(ref($elem))." skipping.");
1587: } else {
1588: $result.=&escape($elem).'&';
1589: }
1590: }
1591: $result=~s/\&$//;
1592: $result .= '__END_ARRAY_REF__';
1593: return $result;
1594: }
1595:
1596: sub hash2str {
1597: my (%hash) = @_;
1598: my $result=&hashref2str(\%hash);
1599: $result=~s/^__HASH_REF__//;
1600: $result=~s/__END_HASH_REF__$//;
1601: return $result;
1602: }
1603:
1604: sub hashref2str {
1605: my ($hashref)=@_;
1606: my $result='__HASH_REF__';
1607: foreach (keys(%$hashref)) {
1608: if (ref($_) eq 'ARRAY') {
1609: $result.=&arrayref2str($_).'=';
1610: } elsif (ref($_) eq 'HASH') {
1611: $result.=&hashref2str($_).'=';
1612: } elsif (ref($_)) {
1613: $result.='=';
1614: #print("Got a ref of ".(ref($_))." skipping.");
1615: } else {
1616: if ($_) {$result.=&escape($_).'=';} else { last; }
1617: }
1618:
1619: if(ref($hashref->{$_}) eq 'ARRAY') {
1620: $result.=&arrayref2str($hashref->{$_}).'&';
1621: } elsif(ref($hashref->{$_}) eq 'HASH') {
1622: $result.=&hashref2str($hashref->{$_}).'&';
1623: } elsif(ref($hashref->{$_})) {
1624: $result.='&';
1625: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1626: } else {
1627: $result.=&escape($hashref->{$_}).'&';
1628: }
1629: }
1630: $result=~s/\&$//;
1631: $result .= '__END_HASH_REF__';
1632: return $result;
1633: }
1634:
1635: sub str2hash {
1636: my ($string)=@_;
1637: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1638: return %$hash;
1639: }
1640:
1641: sub str2hashref {
1642: my ($string) = @_;
1643:
1644: my %hash;
1645:
1646: if($string !~ /^__HASH_REF__/) {
1647: if (! ($string eq '' || !defined($string))) {
1648: $hash{'error'}='Not hash reference';
1649: }
1650: return (\%hash, $string);
1651: }
1652:
1653: $string =~ s/^__HASH_REF__//;
1654:
1655: while($string !~ /^__END_HASH_REF__/) {
1656: #key
1657: my $key='';
1658: if($string =~ /^__HASH_REF__/) {
1659: ($key, $string)=&str2hashref($string);
1660: if(defined($key->{'error'})) {
1661: $hash{'error'}='Bad data';
1662: return (\%hash, $string);
1663: }
1664: } elsif($string =~ /^__ARRAY_REF__/) {
1665: ($key, $string)=&str2arrayref($string);
1666: if($key->[0] eq 'Array reference error') {
1667: $hash{'error'}='Bad data';
1668: return (\%hash, $string);
1669: }
1670: } else {
1671: $string =~ s/^(.*?)=//;
1672: $key=&unescape($1);
1673: }
1674: $string =~ s/^=//;
1675:
1676: #value
1677: my $value='';
1678: if($string =~ /^__HASH_REF__/) {
1679: ($value, $string)=&str2hashref($string);
1680: if(defined($value->{'error'})) {
1681: $hash{'error'}='Bad data';
1682: return (\%hash, $string);
1683: }
1684: } elsif($string =~ /^__ARRAY_REF__/) {
1685: ($value, $string)=&str2arrayref($string);
1686: if($value->[0] eq 'Array reference error') {
1687: $hash{'error'}='Bad data';
1688: return (\%hash, $string);
1689: }
1690: } else {
1691: $value=&get_scalar(\$string,'__END_HASH_REF__');
1692: }
1693: $string =~ s/^&//;
1694:
1695: $hash{$key}=$value;
1696: }
1697:
1698: $string =~ s/^__END_HASH_REF__//;
1699:
1700: return (\%hash, $string);
1701: }
1702:
1703: sub str2array {
1704: my ($string)=@_;
1705: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1706: return @$array;
1707: }
1708:
1709: sub str2arrayref {
1710: my ($string) = @_;
1711: my @array;
1712:
1713: if($string !~ /^__ARRAY_REF__/) {
1714: if (! ($string eq '' || !defined($string))) {
1715: $array[0]='Array reference error';
1716: }
1717: return (\@array, $string);
1718: }
1719:
1720: $string =~ s/^__ARRAY_REF__//;
1721:
1722: while($string !~ /^__END_ARRAY_REF__/) {
1723: my $value='';
1724: if($string =~ /^__HASH_REF__/) {
1725: ($value, $string)=&str2hashref($string);
1726: if(defined($value->{'error'})) {
1727: $array[0] ='Array reference error';
1728: return (\@array, $string);
1729: }
1730: } elsif($string =~ /^__ARRAY_REF__/) {
1731: ($value, $string)=&str2arrayref($string);
1732: if($value->[0] eq 'Array reference error') {
1733: $array[0] ='Array reference error';
1734: return (\@array, $string);
1735: }
1736: } else {
1737: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1738: }
1739: $string =~ s/^&//;
1740:
1741: push(@array, $value);
1742: }
1743:
1744: $string =~ s/^__END_ARRAY_REF__//;
1745:
1746: return (\@array, $string);
1747: }
1748:
1749: # -------------------------------------------------------------------Temp Store
1750:
1751: sub tmpreset {
1752: my ($symb,$namespace,$domain,$stuname) = @_;
1753: if (!$symb) {
1754: $symb=&symbread();
1755: if (!$symb) { $symb= $ENV{'request.url'}; }
1756: }
1757: $symb=escape($symb);
1758:
1759: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1760: $namespace=~s/\//\_/g;
1761: $namespace=~s/\W//g;
1762:
1763: #FIXME needs to do something for /pub resources
1764: if (!$domain) { $domain=$ENV{'user.domain'}; }
1765: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1766: my $path=$perlvar{'lonDaemons'}.'/tmp';
1767: my %hash;
1768: if (tie(%hash,'GDBM_File',
1769: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1770: &GDBM_WRCREAT(),0640)) {
1771: foreach my $key (keys %hash) {
1772: if ($key=~ /:$symb/) {
1773: delete($hash{$key});
1774: }
1775: }
1776: }
1777: }
1778:
1779: sub tmpstore {
1780: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1781:
1782: if (!$symb) {
1783: $symb=&symbread();
1784: if (!$symb) { $symb= $ENV{'request.url'}; }
1785: }
1786: $symb=escape($symb);
1787:
1788: if (!$namespace) {
1789: # I don't think we would ever want to store this for a course.
1790: # it seems this will only be used if we don't have a course.
1791: #$namespace=$ENV{'request.course.id'};
1792: #if (!$namespace) {
1793: $namespace=$ENV{'request.state'};
1794: #}
1795: }
1796: $namespace=~s/\//\_/g;
1797: $namespace=~s/\W//g;
1798: #FIXME needs to do something for /pub resources
1799: if (!$domain) { $domain=$ENV{'user.domain'}; }
1800: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1801: my $now=time;
1802: my %hash;
1803: my $path=$perlvar{'lonDaemons'}.'/tmp';
1804: if (tie(%hash,'GDBM_File',
1805: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1806: &GDBM_WRCREAT(),0640)) {
1807: $hash{"version:$symb"}++;
1808: my $version=$hash{"version:$symb"};
1809: my $allkeys='';
1810: foreach my $key (keys(%$storehash)) {
1811: $allkeys.=$key.':';
1812: $hash{"$version:$symb:$key"}=$$storehash{$key};
1813: }
1814: $hash{"$version:$symb:timestamp"}=$now;
1815: $allkeys.='timestamp';
1816: $hash{"$version:keys:$symb"}=$allkeys;
1817: if (untie(%hash)) {
1818: return 'ok';
1819: } else {
1820: return "error:$!";
1821: }
1822: } else {
1823: return "error:$!";
1824: }
1825: }
1826:
1827: # -----------------------------------------------------------------Temp Restore
1828:
1829: sub tmprestore {
1830: my ($symb,$namespace,$domain,$stuname) = @_;
1831:
1832: if (!$symb) {
1833: $symb=&symbread();
1834: if (!$symb) { $symb= $ENV{'request.url'}; }
1835: }
1836: $symb=escape($symb);
1837:
1838: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1839: #FIXME needs to do something for /pub resources
1840: if (!$domain) { $domain=$ENV{'user.domain'}; }
1841: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1842:
1843: my %returnhash;
1844: $namespace=~s/\//\_/g;
1845: $namespace=~s/\W//g;
1846: my %hash;
1847: my $path=$perlvar{'lonDaemons'}.'/tmp';
1848: if (tie(%hash,'GDBM_File',
1849: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1850: &GDBM_READER(),0640)) {
1851: my $version=$hash{"version:$symb"};
1852: $returnhash{'version'}=$version;
1853: my $scope;
1854: for ($scope=1;$scope<=$version;$scope++) {
1855: my $vkeys=$hash{"$scope:keys:$symb"};
1856: my @keys=split(/:/,$vkeys);
1857: my $key;
1858: $returnhash{"$scope:keys"}=$vkeys;
1859: foreach $key (@keys) {
1860: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1861: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1862: }
1863: }
1864: if (!(untie(%hash))) {
1865: return "error:$!";
1866: }
1867: } else {
1868: return "error:$!";
1869: }
1870: return %returnhash;
1871: }
1872:
1873: # ----------------------------------------------------------------------- Store
1874:
1875: sub store {
1876: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1877: my $home='';
1878:
1879: if ($stuname) { $home=&homeserver($stuname,$domain); }
1880:
1881: $symb=&symbclean($symb);
1882: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1883:
1884: if (!$domain) { $domain=$ENV{'user.domain'}; }
1885: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1886:
1887: &devalidate($symb,$stuname,$domain);
1888:
1889: $symb=escape($symb);
1890: if (!$namespace) {
1891: unless ($namespace=$ENV{'request.course.id'}) {
1892: return '';
1893: }
1894: }
1895: if (!$home) { $home=$ENV{'user.home'}; }
1896: my $namevalue='';
1897: foreach (keys %$storehash) {
1898: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1899: }
1900: $namevalue=~s/\&$//;
1901: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1902: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1903: }
1904:
1905: # -------------------------------------------------------------- Critical Store
1906:
1907: sub cstore {
1908: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1909: my $home='';
1910:
1911: if ($stuname) { $home=&homeserver($stuname,$domain); }
1912:
1913: $symb=&symbclean($symb);
1914: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1915:
1916: if (!$domain) { $domain=$ENV{'user.domain'}; }
1917: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1918:
1919: &devalidate($symb,$stuname,$domain);
1920:
1921: $symb=escape($symb);
1922: if (!$namespace) {
1923: unless ($namespace=$ENV{'request.course.id'}) {
1924: return '';
1925: }
1926: }
1927: if (!$home) { $home=$ENV{'user.home'}; }
1928:
1929: my $namevalue='';
1930: foreach (keys %$storehash) {
1931: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1932: }
1933: $namevalue=~s/\&$//;
1934: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1935: return critical
1936: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1937: }
1938:
1939: # --------------------------------------------------------------------- Restore
1940:
1941: sub restore {
1942: my ($symb,$namespace,$domain,$stuname) = @_;
1943: my $home='';
1944:
1945: if ($stuname) { $home=&homeserver($stuname,$domain); }
1946:
1947: if (!$symb) {
1948: unless ($symb=escape(&symbread())) { return ''; }
1949: } else {
1950: $symb=&escape(&symbclean($symb));
1951: }
1952: if (!$namespace) {
1953: unless ($namespace=$ENV{'request.course.id'}) {
1954: return '';
1955: }
1956: }
1957: if (!$domain) { $domain=$ENV{'user.domain'}; }
1958: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1959: if (!$home) { $home=$ENV{'user.home'}; }
1960: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1961:
1962: my %returnhash=();
1963: foreach (split(/\&/,$answer)) {
1964: my ($name,$value)=split(/\=/,$_);
1965: $returnhash{&unescape($name)}=&unescape($value);
1966: }
1967: my $version;
1968: for ($version=1;$version<=$returnhash{'version'};$version++) {
1969: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1970: $returnhash{$_}=$returnhash{$version.':'.$_};
1971: }
1972: }
1973: return %returnhash;
1974: }
1975:
1976: # ---------------------------------------------------------- Course Description
1977:
1978: sub coursedescription {
1979: my $courseid=shift;
1980: $courseid=~s/^\///;
1981: $courseid=~s/\_/\//g;
1982: my ($cdomain,$cnum)=split(/\//,$courseid);
1983: my $chome=&homeserver($cnum,$cdomain);
1984: my $normalid=$cdomain.'_'.$cnum;
1985: # need to always cache even if we get errors otherwise we keep
1986: # trying and trying and trying to get the course description.
1987: my %envhash=();
1988: my %returnhash=();
1989: $envhash{'course.'.$normalid.'.last_cache'}=time;
1990: if ($chome ne 'no_host') {
1991: %returnhash=&dump('environment',$cdomain,$cnum);
1992: if (!exists($returnhash{'con_lost'})) {
1993: $returnhash{'home'}= $chome;
1994: $returnhash{'domain'} = $cdomain;
1995: $returnhash{'num'} = $cnum;
1996: while (my ($name,$value) = each %returnhash) {
1997: $envhash{'course.'.$normalid.'.'.$name}=$value;
1998: }
1999: $returnhash{'url'}=&clutter($returnhash{'url'});
2000: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2001: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2002: $envhash{'course.'.$normalid.'.home'}=$chome;
2003: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2004: $envhash{'course.'.$normalid.'.num'}=$cnum;
2005: }
2006: }
2007: &appenv(%envhash);
2008: return %returnhash;
2009: }
2010:
2011: # -------------------------------------------------------- Get user privileges
2012:
2013: sub rolesinit {
2014: my ($domain,$username,$authhost)=@_;
2015: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2016: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2017: my %allroles=();
2018: my %thesepriv=();
2019: my $now=time;
2020: my $userroles="user.login.time=$now\n";
2021: my $thesestr;
2022:
2023: if ($rolesdump ne '') {
2024: foreach (split(/&/,$rolesdump)) {
2025: if ($_!~/^rolesdef\&/) {
2026: my ($area,$role)=split(/=/,$_);
2027: $area=~s/\_\w\w$//;
2028: my ($trole,$tend,$tstart)=split(/_/,$role);
2029: $userroles.='user.role.'.$trole.'.'.$area.'='.
2030: $tstart.'.'.$tend."\n";
2031: # log the associated role with the area
2032: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2033: if ($tend!=0) {
2034: if ($tend<$now) {
2035: $trole='';
2036: }
2037: }
2038: if ($tstart!=0) {
2039: if ($tstart>$now) {
2040: $trole='';
2041: }
2042: }
2043: if (($area ne '') && ($trole ne '')) {
2044: my $spec=$trole.'.'.$area;
2045: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2046: if ($trole =~ /^cr\//) {
2047: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2048: my $homsvr=homeserver($rauthor,$rdomain);
2049: if ($hostname{$homsvr} ne '') {
2050: my ($rdummy,$roledef)=
2051: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2052:
2053: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2054: my ($syspriv,$dompriv,$coursepriv)=
2055: split(/\_/,$roledef);
2056: if (defined($syspriv)) {
2057: $allroles{'cm./'}.=':'.$syspriv;
2058: $allroles{$spec.'./'}.=':'.$syspriv;
2059: }
2060: if ($tdomain ne '') {
2061: if (defined($dompriv)) {
2062: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2063: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2064: }
2065: if ($trest ne '') {
2066: if (defined($coursepriv)) {
2067: $allroles{'cm.'.$area}.=':'.$coursepriv;
2068: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
2069: }
2070: }
2071: }
2072: }
2073: }
2074: } else {
2075: if (defined($pr{$trole.':s'})) {
2076: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
2077: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2078: }
2079: if ($tdomain ne '') {
2080: if (defined($pr{$trole.':d'})) {
2081: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2082: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2083: }
2084: if ($trest ne '') {
2085: if (defined($pr{$trole.':c'})) {
2086: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2087: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2088: }
2089: }
2090: }
2091: }
2092: }
2093: }
2094: }
2095: my $adv=0;
2096: my $author=0;
2097: foreach (keys %allroles) {
2098: %thesepriv=();
2099: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
2100: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2101: foreach (split(/:/,$allroles{$_})) {
2102: if ($_ ne '') {
2103: my ($privilege,$restrictions)=split(/&/,$_);
2104: if ($restrictions eq '') {
2105: $thesepriv{$privilege}='F';
2106: } else {
2107: if ($thesepriv{$privilege} ne 'F') {
2108: $thesepriv{$privilege}.=$restrictions;
2109: }
2110: }
2111: }
2112: }
2113: $thesestr='';
2114: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2115: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
2116: }
2117: $userroles.='user.adv='.$adv."\n".
2118: 'user.author='.$author."\n";
2119: $ENV{'user.adv'}=$adv;
2120: }
2121: return $userroles;
2122: }
2123:
2124: # --------------------------------------------------------------- get interface
2125:
2126: sub get {
2127: my ($namespace,$storearr,$udomain,$uname)=@_;
2128: my $items='';
2129: foreach (@$storearr) {
2130: $items.=escape($_).'&';
2131: }
2132: $items=~s/\&$//;
2133: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2134: if (!$uname) { $uname=$ENV{'user.name'}; }
2135: my $uhome=&homeserver($uname,$udomain);
2136:
2137: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2138: my @pairs=split(/\&/,$rep);
2139: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2140: return @pairs;
2141: }
2142: my %returnhash=();
2143: my $i=0;
2144: foreach (@$storearr) {
2145: $returnhash{$_}=unescape($pairs[$i]);
2146: $i++;
2147: }
2148: return %returnhash;
2149: }
2150:
2151: # --------------------------------------------------------------- del interface
2152:
2153: sub del {
2154: my ($namespace,$storearr,$udomain,$uname)=@_;
2155: my $items='';
2156: foreach (@$storearr) {
2157: $items.=escape($_).'&';
2158: }
2159: $items=~s/\&$//;
2160: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2161: if (!$uname) { $uname=$ENV{'user.name'}; }
2162: my $uhome=&homeserver($uname,$udomain);
2163:
2164: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2165: }
2166:
2167: # -------------------------------------------------------------- dump interface
2168:
2169: sub dump {
2170: my ($namespace,$udomain,$uname,$regexp)=@_;
2171: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2172: if (!$uname) { $uname=$ENV{'user.name'}; }
2173: my $uhome=&homeserver($uname,$udomain);
2174: if ($regexp) {
2175: $regexp=&escape($regexp);
2176: } else {
2177: $regexp='.';
2178: }
2179: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2180: my @pairs=split(/\&/,$rep);
2181: my %returnhash=();
2182: foreach (@pairs) {
2183: my ($key,$value)=split(/=/,$_);
2184: $returnhash{unescape($key)}=unescape($value);
2185: }
2186: return %returnhash;
2187: }
2188:
2189: # -------------------------------------------------------------- keys interface
2190:
2191: sub getkeys {
2192: my ($namespace,$udomain,$uname)=@_;
2193: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2194: if (!$uname) { $uname=$ENV{'user.name'}; }
2195: my $uhome=&homeserver($uname,$udomain);
2196: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2197: my @keyarray=();
2198: foreach (split(/\&/,$rep)) {
2199: push (@keyarray,&unescape($_));
2200: }
2201: return @keyarray;
2202: }
2203:
2204: # --------------------------------------------------------------- currentdump
2205: sub currentdump {
2206: my ($courseid,$sdom,$sname)=@_;
2207: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2208: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2209: $sname = $ENV{'user.name'} if (! defined($sname));
2210: my $uhome = &homeserver($sname,$sdom);
2211: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2212: return if ($rep =~ /^(error:|no_such_host)/);
2213: #
2214: my %returnhash=();
2215: #
2216: if ($rep eq "unknown_cmd") {
2217: # an old lond will not know currentdump
2218: # Do a dump and make it look like a currentdump
2219: my @tmp = &dump($courseid,$sdom,$sname,'.');
2220: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2221: my %hash = @tmp;
2222: @tmp=();
2223: # Code ripped from lond, essentially. The only difference
2224: # here is the unescaping done by lonnet::dump(). Conceivably
2225: # we might run in to problems with parameter names =~ /^v\./
2226: while (my ($key,$value) = each(%hash)) {
2227: my ($v,$symb,$param) = split(/:/,$key);
2228: next if ($v eq 'version' || $symb eq 'keys');
2229: next if (exists($returnhash{$symb}) &&
2230: exists($returnhash{$symb}->{$param}) &&
2231: $returnhash{$symb}->{'v.'.$param} > $v);
2232: $returnhash{$symb}->{$param}=$value;
2233: $returnhash{$symb}->{'v.'.$param}=$v;
2234: }
2235: #
2236: # Remove all of the keys in the hashes which keep track of
2237: # the version of the parameter.
2238: while (my ($symb,$param_hash) = each(%returnhash)) {
2239: # use a foreach because we are going to delete from the hash.
2240: foreach my $key (keys(%$param_hash)) {
2241: delete($param_hash->{$key}) if ($key =~ /^v\./);
2242: }
2243: }
2244: } else {
2245: my @pairs=split(/\&/,$rep);
2246: foreach (@pairs) {
2247: my ($key,$value)=split(/=/,$_);
2248: my ($symb,$param) = split(/:/,$key);
2249: $returnhash{&unescape($symb)}->{&unescape($param)} =
2250: &unescape($value);
2251: }
2252: }
2253: return %returnhash;
2254: }
2255:
2256: # --------------------------------------------------------------- put interface
2257:
2258: sub put {
2259: my ($namespace,$storehash,$udomain,$uname)=@_;
2260: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2261: if (!$uname) { $uname=$ENV{'user.name'}; }
2262: my $uhome=&homeserver($uname,$udomain);
2263: my $items='';
2264: foreach (keys %$storehash) {
2265: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
2266: }
2267: $items=~s/\&$//;
2268: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2269: }
2270:
2271: # ------------------------------------------------------ critical put interface
2272:
2273: sub cput {
2274: my ($namespace,$storehash,$udomain,$uname)=@_;
2275: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2276: if (!$uname) { $uname=$ENV{'user.name'}; }
2277: my $uhome=&homeserver($uname,$udomain);
2278: my $items='';
2279: foreach (keys %$storehash) {
2280: $items.=escape($_).'='.escape($$storehash{$_}).'&';
2281: }
2282: $items=~s/\&$//;
2283: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2284: }
2285:
2286: # -------------------------------------------------------------- eget interface
2287:
2288: sub eget {
2289: my ($namespace,$storearr,$udomain,$uname)=@_;
2290: my $items='';
2291: foreach (@$storearr) {
2292: $items.=escape($_).'&';
2293: }
2294: $items=~s/\&$//;
2295: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2296: if (!$uname) { $uname=$ENV{'user.name'}; }
2297: my $uhome=&homeserver($uname,$udomain);
2298: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2299: my @pairs=split(/\&/,$rep);
2300: my %returnhash=();
2301: my $i=0;
2302: foreach (@$storearr) {
2303: $returnhash{$_}=unescape($pairs[$i]);
2304: $i++;
2305: }
2306: return %returnhash;
2307: }
2308:
2309: # ---------------------------------------------- Custom access rule evaluation
2310:
2311: sub customaccess {
2312: my ($priv,$uri)=@_;
2313: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2314: $urealm=~s/^\W//;
2315: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2316: my $access=0;
2317: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2318: my ($effect,$realm,$role)=split(/\:/,$_);
2319: if ($role) {
2320: if ($role ne $urole) { next; }
2321: }
2322: foreach (split(/\s*\,\s*/,$realm)) {
2323: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2324: if ($tdom) {
2325: if ($tdom ne $udom) { next; }
2326: }
2327: if ($tcrs) {
2328: if ($tcrs ne $ucrs) { next; }
2329: }
2330: if ($tsec) {
2331: if ($tsec ne $usec) { next; }
2332: }
2333: $access=($effect eq 'allow');
2334: last;
2335: }
2336: if ($realm eq '' && $role eq '') {
2337: $access=($effect eq 'allow');
2338: }
2339: }
2340: return $access;
2341: }
2342:
2343: # ------------------------------------------------- Check for a user privilege
2344:
2345: sub allowed {
2346: my ($priv,$uri)=@_;
2347:
2348: my $orguri=$uri;
2349: $uri=&declutter($uri);
2350:
2351: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2352: # Free bre access to adm and meta resources
2353:
2354: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2355: return 'F';
2356: }
2357:
2358: # Free bre to public access
2359:
2360: if ($priv eq 'bre') {
2361: my $copyright=&metadata($uri,'copyright');
2362: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2363: return 'F';
2364: }
2365: if ($copyright eq 'priv') {
2366: $uri=~/([^\/]+)\/([^\/]+)\//;
2367: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2368: return '';
2369: }
2370: }
2371: if ($copyright eq 'domain') {
2372: $uri=~/([^\/]+)\/([^\/]+)\//;
2373: unless (($ENV{'user.domain'} eq $1) ||
2374: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2375: return '';
2376: }
2377: }
2378: if ($ENV{'request.role'}=~ /li\.\//) {
2379: # Library role, so allow browsing of resources in this domain.
2380: return 'F';
2381: }
2382: if ($copyright eq 'custom') {
2383: unless (&customaccess($priv,$uri)) { return ''; }
2384: }
2385: }
2386: # Domain coordinator is trying to create a course
2387: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2388: # uri is the requested domain in this case.
2389: # comparison to 'request.role.domain' shows if the user has selected
2390: # a role of dc for the domain in question.
2391: return 'F' if ($uri eq $ENV{'request.role.domain'});
2392: }
2393:
2394: my $thisallowed='';
2395: my $statecond=0;
2396: my $courseprivid='';
2397:
2398: # Course
2399:
2400: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2401: $thisallowed.=$1;
2402: }
2403:
2404: # Domain
2405:
2406: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2407: =~/$priv\&([^\:]*)/) {
2408: $thisallowed.=$1;
2409: }
2410:
2411: # Course: uri itself is a course
2412: my $courseuri=$uri;
2413: $courseuri=~s/\_(\d)/\/$1/;
2414: $courseuri=~s/^([^\/])/\/$1/;
2415:
2416: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2417: =~/$priv\&([^\:]*)/) {
2418: $thisallowed.=$1;
2419: }
2420:
2421: # URI is an uploaded document for this course
2422:
2423: if (($priv eq 'bre') &&
2424: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2425: return 'F';
2426: }
2427: # Full access at system, domain or course-wide level? Exit.
2428:
2429: if ($thisallowed=~/F/) {
2430: return 'F';
2431: }
2432:
2433: # If this is generating or modifying users, exit with special codes
2434:
2435: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
2436: return $thisallowed;
2437: }
2438: #
2439: # Gathered so far: system, domain and course wide privileges
2440: #
2441: # Course: See if uri or referer is an individual resource that is part of
2442: # the course
2443:
2444: if ($ENV{'request.course.id'}) {
2445:
2446: $courseprivid=$ENV{'request.course.id'};
2447: if ($ENV{'request.course.sec'}) {
2448: $courseprivid.='/'.$ENV{'request.course.sec'};
2449: }
2450: $courseprivid=~s/\_/\//;
2451: my $checkreferer=1;
2452: my ($match,$cond)=&is_on_map($uri);
2453: if ($match) {
2454: $statecond=$cond;
2455: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2456: =~/$priv\&([^\:]*)/) {
2457: $thisallowed.=$1;
2458: $checkreferer=0;
2459: }
2460: }
2461:
2462: if ($checkreferer) {
2463: my $refuri=$ENV{'httpref.'.$orguri};
2464: unless ($refuri) {
2465: foreach (keys %ENV) {
2466: if ($_=~/^httpref\..*\*/) {
2467: my $pattern=$_;
2468: $pattern=~s/^httpref\.\/res\///;
2469: $pattern=~s/\*/\[\^\/\]\+/g;
2470: $pattern=~s/\//\\\//g;
2471: if ($orguri=~/$pattern/) {
2472: $refuri=$ENV{$_};
2473: }
2474: }
2475: }
2476: }
2477:
2478: if ($refuri) {
2479: $refuri=&declutter($refuri);
2480: my ($match,$cond)=&is_on_map($refuri);
2481: if ($match) {
2482: my $refstatecond=$cond;
2483: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2484: =~/$priv\&([^\:]*)/) {
2485: $thisallowed.=$1;
2486: $uri=$refuri;
2487: $statecond=$refstatecond;
2488: }
2489: }
2490: }
2491: }
2492: }
2493:
2494: #
2495: # Gathered now: all privileges that could apply, and condition number
2496: #
2497: #
2498: # Full or no access?
2499: #
2500:
2501: if ($thisallowed=~/F/) {
2502: return 'F';
2503: }
2504:
2505: unless ($thisallowed) {
2506: return '';
2507: }
2508:
2509: # Restrictions exist, deal with them
2510: #
2511: # C:according to course preferences
2512: # R:according to resource settings
2513: # L:unless locked
2514: # X:according to user session state
2515: #
2516:
2517: # Possibly locked functionality, check all courses
2518: # Locks might take effect only after 10 minutes cache expiration for other
2519: # courses, and 2 minutes for current course
2520:
2521: my $envkey;
2522: if ($thisallowed=~/L/) {
2523: foreach $envkey (keys %ENV) {
2524: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2525: my $courseid=$2;
2526: my $roleid=$1.'.'.$2;
2527: $courseid=~s/^\///;
2528: my $expiretime=600;
2529: if ($ENV{'request.role'} eq $roleid) {
2530: $expiretime=120;
2531: }
2532: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2533: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2534: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2535: &coursedescription($courseid);
2536: }
2537: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2538: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2539: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2540: &log($ENV{'user.domain'},$ENV{'user.name'},
2541: $ENV{'user.home'},
2542: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2543: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2544: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2545: return '';
2546: }
2547: }
2548: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2549: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2550: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2551: &log($ENV{'user.domain'},$ENV{'user.name'},
2552: $ENV{'user.home'},
2553: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2554: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2555: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2556: return '';
2557: }
2558: }
2559: }
2560: }
2561: }
2562:
2563: #
2564: # Rest of the restrictions depend on selected course
2565: #
2566:
2567: unless ($ENV{'request.course.id'}) {
2568: return '1';
2569: }
2570:
2571: #
2572: # Now user is definitely in a course
2573: #
2574:
2575:
2576: # Course preferences
2577:
2578: if ($thisallowed=~/C/) {
2579: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2580: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2581: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2582: =~/$rolecode/) {
2583: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2584: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2585: $ENV{'request.course.id'});
2586: return '';
2587: }
2588:
2589: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2590: =~/$unamedom/) {
2591: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2592: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2593: $ENV{'request.course.id'});
2594: return '';
2595: }
2596: }
2597:
2598: # Resource preferences
2599:
2600: if ($thisallowed=~/R/) {
2601: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2602: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2603: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2604: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2605: return '';
2606: }
2607: }
2608:
2609: # Restricted by state or randomout?
2610:
2611: if ($thisallowed=~/X/) {
2612: if ($ENV{'acc.randomout'}) {
2613: my $symb=&symbread($uri,1);
2614: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2615: return '';
2616: }
2617: }
2618: if (&condval($statecond)) {
2619: return '2';
2620: } else {
2621: return '';
2622: }
2623: }
2624:
2625: return 'F';
2626: }
2627:
2628: # --------------------------------------------------- Is a resource on the map?
2629:
2630: sub is_on_map {
2631: my $uri=&declutter(shift);
2632: my @uriparts=split(/\//,$uri);
2633: my $filename=$uriparts[$#uriparts];
2634: my $pathname=$uri;
2635: $pathname=~s|/\Q$filename\E$||;
2636: $pathname=~s/^adm\/wrapper\///;
2637: #Trying to find the conditional for the file
2638: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2639: /\&\Q$filename\E\:([\d\|]+)\&/);
2640: if ($match) {
2641: return (1,$1);
2642: } else {
2643: my ($name,$ext)=($filename=~/^(.+)\.(\w+)$/);
2644: $ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2645: /\&(\Q$name\E\.\d+\.$ext)\:([\d\|]+)\&/;
2646: return (0,$2,$pathname.'/'.$1);
2647: }
2648: }
2649:
2650: # ----------------------------------------------------------------- Define Role
2651:
2652: sub definerole {
2653: if (allowed('mcr','/')) {
2654: my ($rolename,$sysrole,$domrole,$courole)=@_;
2655: foreach (split(':',$sysrole)) {
2656: my ($crole,$cqual)=split(/\&/,$_);
2657: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2658: if ($pr{'cr:s'}=~/$crole\&/) {
2659: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2660: return "refused:s:$crole&$cqual";
2661: }
2662: }
2663: }
2664: foreach (split(':',$domrole)) {
2665: my ($crole,$cqual)=split(/\&/,$_);
2666: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2667: if ($pr{'cr:d'}=~/$crole\&/) {
2668: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2669: return "refused:d:$crole&$cqual";
2670: }
2671: }
2672: }
2673: foreach (split(':',$courole)) {
2674: my ($crole,$cqual)=split(/\&/,$_);
2675: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2676: if ($pr{'cr:c'}=~/$crole\&/) {
2677: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2678: return "refused:c:$crole&$cqual";
2679: }
2680: }
2681: }
2682: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2683: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2684: "rolesdef_$rolename=".
2685: escape($sysrole.'_'.$domrole.'_'.$courole);
2686: return reply($command,$ENV{'user.home'});
2687: } else {
2688: return 'refused';
2689: }
2690: }
2691:
2692: # ---------------- Make a metadata query against the network of library servers
2693:
2694: sub metadata_query {
2695: my ($query,$custom,$customshow,$server_array)=@_;
2696: my %rhash;
2697: my @server_list = (defined($server_array) ? @$server_array
2698: : keys(%libserv) );
2699: for my $server (@server_list) {
2700: unless ($custom or $customshow) {
2701: my $reply=&reply("querysend:".&escape($query),$server);
2702: $rhash{$server}=$reply;
2703: }
2704: else {
2705: my $reply=&reply("querysend:".&escape($query).':'.
2706: &escape($custom).':'.&escape($customshow),
2707: $server);
2708: $rhash{$server}=$reply;
2709: }
2710: }
2711: return \%rhash;
2712: }
2713:
2714: # ----------------------------------------- Send log queries and wait for reply
2715:
2716: sub log_query {
2717: my ($uname,$udom,$query,%filters)=@_;
2718: my $uhome=&homeserver($uname,$udom);
2719: if ($uhome eq 'no_host') { return 'error: no_host'; }
2720: my $uhost=$hostname{$uhome};
2721: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2722: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2723: $uhome);
2724: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2725: return get_query_reply($queryid);
2726: }
2727:
2728: sub get_query_reply {
2729: my $queryid=shift;
2730: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2731: my $reply='';
2732: for (1..100) {
2733: sleep 2;
2734: if (-e $replyfile.'.end') {
2735: if (my $fh=Apache::File->new($replyfile)) {
2736: $reply.=<$fh>;
2737: $fh->close;
2738: } else { return 'error: reply_file_error'; }
2739: return &unescape($reply);
2740: }
2741: }
2742: return 'timeout:'.$queryid;
2743: }
2744:
2745: sub courselog_query {
2746: #
2747: # possible filters:
2748: # url: url or symb
2749: # username
2750: # domain
2751: # action: view, submit, grade
2752: # start: timestamp
2753: # end: timestamp
2754: #
2755: my (%filters)=@_;
2756: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2757: if ($filters{'url'}) {
2758: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2759: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2760: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2761: }
2762: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2763: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2764: return &log_query($cname,$cdom,'courselog',%filters);
2765: }
2766:
2767: sub userlog_query {
2768: my ($uname,$udom,%filters)=@_;
2769: return &log_query($uname,$udom,'userlog',%filters);
2770: }
2771:
2772: # ------------------------------------------------------------------ Plain Text
2773:
2774: sub plaintext {
2775: my $short=shift;
2776: return &mt($prp{$short});
2777: }
2778:
2779: # ----------------------------------------------------------------- Assign Role
2780:
2781: sub assignrole {
2782: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
2783: my $mrole;
2784: if ($role =~ /^cr\//) {
2785: my $cwosec=$url;
2786: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2787: unless (&allowed('ccr',$cwosec)) {
2788: &logthis('Refused custom assignrole: '.
2789: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2790: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2791: return 'refused';
2792: }
2793: $mrole='cr';
2794: } else {
2795: my $cwosec=$url;
2796: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2797: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
2798: &logthis('Refused assignrole: '.
2799: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2800: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2801: return 'refused';
2802: }
2803: $mrole=$role;
2804: }
2805: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2806: "$udom:$uname:$url".'_'."$mrole=$role";
2807: if ($end) { $command.='_'.$end; }
2808: if ($start) {
2809: if ($end) {
2810: $command.='_'.$start;
2811: } else {
2812: $command.='_0_'.$start;
2813: }
2814: }
2815: # actually delete
2816: if ($deleteflag) {
2817: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
2818: # modify command to delete the role
2819: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
2820: "$udom:$uname:$url".'_'."$mrole";
2821: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
2822: # set start and finish to negative values for userrolelog
2823: $start=-1;
2824: $end=-1;
2825: }
2826: }
2827: # send command
2828: my $answer=&reply($command,&homeserver($uname,$udom));
2829: # log new user role if status is ok
2830: if ($answer eq 'ok') {
2831: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
2832: }
2833: return $answer;
2834: }
2835:
2836: # -------------------------------------------------- Modify user authentication
2837: # Overrides without validation
2838:
2839: sub modifyuserauth {
2840: my ($udom,$uname,$umode,$upass)=@_;
2841: my $uhome=&homeserver($uname,$udom);
2842: unless (&allowed('mau',$udom)) { return 'refused'; }
2843: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2844: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2845: ' in domain '.$ENV{'request.role.domain'});
2846: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2847: &escape($upass),$uhome);
2848: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2849: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2850: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2851: &log($udom,,$uname,$uhome,
2852: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2853: $ENV{'user.name'}.', '.$umode.
2854: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2855: unless ($reply eq 'ok') {
2856: &logthis('Authentication mode error: '.$reply);
2857: return 'error: '.$reply;
2858: }
2859: return 'ok';
2860: }
2861:
2862: # --------------------------------------------------------------- Modify a user
2863:
2864: sub modifyuser {
2865: my ($udom, $uname, $uid,
2866: $umode, $upass, $first,
2867: $middle, $last, $gene,
2868: $forceid, $desiredhome, $email)=@_;
2869: $udom=~s/\W//g;
2870: $uname=~s/\W//g;
2871: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2872: $umode.', '.$first.', '.$middle.', '.
2873: $last.', '.$gene.'(forceid: '.$forceid.')'.
2874: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2875: ' desiredhome not specified').
2876: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2877: ' in domain '.$ENV{'request.role.domain'});
2878: my $uhome=&homeserver($uname,$udom,'true');
2879: # ----------------------------------------------------------------- Create User
2880: if (($uhome eq 'no_host') &&
2881: (($umode && $upass) || ($umode eq 'localauth'))) {
2882: my $unhome='';
2883: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2884: $unhome = $desiredhome;
2885: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2886: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2887: } else { # load balancing routine for determining $unhome
2888: my $tryserver;
2889: my $loadm=10000000;
2890: foreach $tryserver (keys %libserv) {
2891: if ($hostdom{$tryserver} eq $udom) {
2892: my $answer=reply('load',$tryserver);
2893: if (($answer=~/\d+/) && ($answer<$loadm)) {
2894: $loadm=$answer;
2895: $unhome=$tryserver;
2896: }
2897: }
2898: }
2899: }
2900: if (($unhome eq '') || ($unhome eq 'no_host')) {
2901: return 'error: unable to find a home server for '.$uname.
2902: ' in domain '.$udom;
2903: }
2904: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2905: &escape($upass),$unhome);
2906: unless ($reply eq 'ok') {
2907: return 'error: '.$reply;
2908: }
2909: $uhome=&homeserver($uname,$udom,'true');
2910: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2911: return 'error: unable verify users home machine.';
2912: }
2913: } # End of creation of new user
2914: # ---------------------------------------------------------------------- Add ID
2915: if ($uid) {
2916: $uid=~tr/A-Z/a-z/;
2917: my %uidhash=&idrget($udom,$uname);
2918: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2919: && (!$forceid)) {
2920: unless ($uid eq $uidhash{$uname}) {
2921: return 'error: user id "'.$uid.'" does not match '.
2922: 'current user id "'.$uidhash{$uname}.'".';
2923: }
2924: } else {
2925: &idput($udom,($uname => $uid));
2926: }
2927: }
2928: # -------------------------------------------------------------- Add names, etc
2929: my @tmp=&get('environment',
2930: ['firstname','middlename','lastname','generation'],
2931: $udom,$uname);
2932: my %names;
2933: if ($tmp[0] =~ m/^error:.*/) {
2934: %names=();
2935: } else {
2936: %names = @tmp;
2937: }
2938: #
2939: # Make sure to not trash student environment if instructor does not bother
2940: # to supply name and email information
2941: #
2942: if ($first) { $names{'firstname'} = $first; }
2943: if (defined($middle)) { $names{'middlename'} = $middle; }
2944: if ($last) { $names{'lastname'} = $last; }
2945: if (defined($gene)) { $names{'generation'} = $gene; }
2946: if ($email) { $names{'notification'} = $email;
2947: $names{'critnotification'} = $email; }
2948:
2949: my $reply = &put('environment', \%names, $udom,$uname);
2950: if ($reply ne 'ok') { return 'error: '.$reply; }
2951: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2952: $umode.', '.$first.', '.$middle.', '.
2953: $last.', '.$gene.' by '.
2954: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2955: return 'ok';
2956: }
2957:
2958: # -------------------------------------------------------------- Modify student
2959:
2960: sub modifystudent {
2961: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2962: $end,$start,$forceid,$desiredhome,$email)=@_;
2963: my $cid='';
2964: unless ($cid=$ENV{'request.course.id'}) {
2965: return 'not_in_class';
2966: }
2967: # --------------------------------------------------------------- Make the user
2968: my $reply=&modifyuser
2969: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2970: $desiredhome,$email);
2971: unless ($reply eq 'ok') { return $reply; }
2972: # This will cause &modify_student_enrollment to get the uid from the
2973: # students environment
2974: $uid = undef if (!$forceid);
2975: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2976: $last,$gene,$usec,$end,$start);
2977: return $reply;
2978: }
2979:
2980: sub modify_student_enrollment {
2981: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2982: # Get the course id from the environment
2983: my $cid='';
2984: unless ($cid=$ENV{'request.course.id'}) {
2985: return 'not_in_class';
2986: }
2987: # Make sure the user exists
2988: my $uhome=&homeserver($uname,$udom);
2989: if (($uhome eq '') || ($uhome eq 'no_host')) {
2990: return 'error: no such user';
2991: }
2992: #
2993: # Get student data if we were not given enough information
2994: if (!defined($first) || $first eq '' ||
2995: !defined($last) || $last eq '' ||
2996: !defined($uid) || $uid eq '' ||
2997: !defined($middle) || $middle eq '' ||
2998: !defined($gene) || $gene eq '') {
2999: # They did not supply us with enough data to enroll the student, so
3000: # we need to pick up more information.
3001: my %tmp = &get('environment',
3002: ['firstname','middlename','lastname', 'generation','id']
3003: ,$udom,$uname);
3004:
3005: foreach (keys(%tmp)) {
3006: &logthis("key $_ = ".$tmp{$_});
3007: }
3008: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3009: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3010: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3011: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3012: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3013: }
3014: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
3015: $first,$middle);
3016: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
3017: $ENV{'course.'.$cid.'.num'}.':classlist:'.
3018: &escape($uname.':'.$udom).'='.
3019: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
3020: $ENV{'course.'.$cid.'.home'});
3021: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3022: return 'error: '.$reply;
3023: }
3024: # Add student role to user
3025: my $uurl='/'.$cid;
3026: $uurl=~s/\_/\//g;
3027: if ($usec) {
3028: $uurl.='/'.$usec;
3029: }
3030: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3031: }
3032:
3033: # ------------------------------------------------- Write to course preferences
3034:
3035: sub writecoursepref {
3036: my ($courseid,%prefs)=@_;
3037: $courseid=~s/^\///;
3038: $courseid=~s/\_/\//g;
3039: my ($cdomain,$cnum)=split(/\//,$courseid);
3040: my $chome=homeserver($cnum,$cdomain);
3041: if (($chome eq '') || ($chome eq 'no_host')) {
3042: return 'error: no such course';
3043: }
3044: my $cstring='';
3045: foreach (keys %prefs) {
3046: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3047: }
3048: $cstring=~s/\&$//;
3049: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3050: }
3051:
3052: # ---------------------------------------------------------- Make/modify course
3053:
3054: sub createcourse {
3055: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
3056: $url=&declutter($url);
3057: my $cid='';
3058: unless (&allowed('ccc',$udom)) {
3059: return 'refused';
3060: }
3061: # ------------------------------------------------------------------- Create ID
3062: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3063: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3064: # ----------------------------------------------- Make sure that does not exist
3065: my $uhome=&homeserver($uname,$udom,'true');
3066: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3067: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3068: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3069: $uhome=&homeserver($uname,$udom,'true');
3070: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3071: return 'error: unable to generate unique course-ID';
3072: }
3073: }
3074: # ------------------------------------------------ Check supplied server name
3075: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3076: if (! exists($libserv{$course_server})) {
3077: return 'error:bad server name '.$course_server;
3078: }
3079: # ------------------------------------------------------------- Make the course
3080: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3081: $course_server);
3082: unless ($reply eq 'ok') { return 'error: '.$reply; }
3083: $uhome=&homeserver($uname,$udom,'true');
3084: if (($uhome eq '') || ($uhome eq 'no_host')) {
3085: return 'error: no such course';
3086: }
3087: # ----------------------------------------------------------------- Course made
3088: # log existance
3089: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),
3090: $uhome);
3091: &flushcourselogs();
3092: # set toplevel url
3093: my $topurl=$url;
3094: unless ($nonstandard) {
3095: # ------------------------------------------ For standard courses, make top url
3096: my $mapurl=&clutter($url);
3097: if ($mapurl eq '/res/') { $mapurl=''; }
3098: $ENV{'form.initmap'}=(<<ENDINITMAP);
3099: <map>
3100: <resource id="1" type="start"></resource>
3101: <resource id="2" src="$mapurl"></resource>
3102: <resource id="3" type="finish"></resource>
3103: <link index="1" from="1" to="2"></link>
3104: <link index="2" from="2" to="3"></link>
3105: </map>
3106: ENDINITMAP
3107: $topurl=&declutter(
3108: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3109: );
3110: }
3111: # ----------------------------------------------------------- Write preferences
3112: &writecoursepref($udom.'_'.$uname,
3113: ('description' => $description,
3114: 'url' => $topurl));
3115: return '/'.$udom.'/'.$uname;
3116: }
3117:
3118: # ---------------------------------------------------------- Assign Custom Role
3119:
3120: sub assigncustomrole {
3121: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3122: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3123: $end,$start,$deleteflag);
3124: }
3125:
3126: # ----------------------------------------------------------------- Revoke Role
3127:
3128: sub revokerole {
3129: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3130: my $now=time;
3131: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3132: }
3133:
3134: # ---------------------------------------------------------- Revoke Custom Role
3135:
3136: sub revokecustomrole {
3137: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3138: my $now=time;
3139: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3140: $deleteflag);
3141: }
3142:
3143: # ------------------------------------------------------------ Directory lister
3144:
3145: sub dirlist {
3146: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3147:
3148: $uri=~s/^\///;
3149: $uri=~s/\/$//;
3150: my ($udom, $uname);
3151: (undef,$udom,$uname)=split(/\//,$uri);
3152: if(defined($userdomain)) {
3153: $udom = $userdomain;
3154: }
3155: if(defined($username)) {
3156: $uname = $username;
3157: }
3158:
3159: my $dirRoot = $perlvar{'lonDocRoot'};
3160: if(defined($alternateDirectoryRoot)) {
3161: $dirRoot = $alternateDirectoryRoot;
3162: $dirRoot =~ s/\/$//;
3163: }
3164:
3165: if($udom) {
3166: if($uname) {
3167: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3168: homeserver($uname,$udom));
3169: return split(/:/,$listing);
3170: } elsif(!defined($alternateDirectoryRoot)) {
3171: my $tryserver;
3172: my %allusers=();
3173: foreach $tryserver (keys %libserv) {
3174: if($hostdom{$tryserver} eq $udom) {
3175: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3176: $udom, $tryserver);
3177: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3178: && ($listing ne 'con_lost')) {
3179: foreach (split(/:/,$listing)) {
3180: my ($entry,@stat)=split(/&/,$_);
3181: $allusers{$entry}=1;
3182: }
3183: }
3184: }
3185: }
3186: my $alluserstr='';
3187: foreach (sort keys %allusers) {
3188: $alluserstr.=$_.'&user:';
3189: }
3190: $alluserstr=~s/:$//;
3191: return split(/:/,$alluserstr);
3192: } else {
3193: my @emptyResults = ();
3194: push(@emptyResults, 'missing user name');
3195: return split(':',@emptyResults);
3196: }
3197: } elsif(!defined($alternateDirectoryRoot)) {
3198: my $tryserver;
3199: my %alldom=();
3200: foreach $tryserver (keys %libserv) {
3201: $alldom{$hostdom{$tryserver}}=1;
3202: }
3203: my $alldomstr='';
3204: foreach (sort keys %alldom) {
3205: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3206: }
3207: $alldomstr=~s/:$//;
3208: return split(/:/,$alldomstr);
3209: } else {
3210: my @emptyResults = ();
3211: push(@emptyResults, 'missing domain');
3212: return split(':',@emptyResults);
3213: }
3214: }
3215:
3216: # --------------------------------------------- GetFileTimestamp
3217: # This function utilizes dirlist and returns the date stamp for
3218: # when it was last modified. It will also return an error of -1
3219: # if an error occurs
3220:
3221: ##
3222: ## FIXME: This subroutine assumes its caller knows something about the
3223: ## directory structure of the home server for the student ($root).
3224: ## Not a good assumption to make. Since this is for looking up files
3225: ## in user directories, the full path should be constructed by lond, not
3226: ## whatever machine we request data from.
3227: ##
3228: sub GetFileTimestamp {
3229: my ($studentDomain,$studentName,$filename,$root)=@_;
3230: $studentDomain=~s/\W//g;
3231: $studentName=~s/\W//g;
3232: my $subdir=$studentName.'__';
3233: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3234: my $proname="$studentDomain/$subdir/$studentName";
3235: $proname .= '/'.$filename;
3236: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3237: $studentName, $root);
3238: my @stats = split('&', $fileStat);
3239: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
3240: # @stats contains first the filename, then the stat output
3241: return $stats[10]; # so this is 10 instead of 9.
3242: } else {
3243: return -1;
3244: }
3245: }
3246:
3247: # -------------------------------------------------------- Value of a Condition
3248:
3249: sub directcondval {
3250: my $number=shift;
3251: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3252: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3253: } else {
3254: return 2;
3255: }
3256: }
3257:
3258: sub condval {
3259: my $condidx=shift;
3260: my $result=0;
3261: my $allpathcond='';
3262: foreach (split(/\|/,$condidx)) {
3263: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3264: $allpathcond.=
3265: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3266: }
3267: }
3268: $allpathcond=~s/\|$//;
3269: if ($ENV{'request.course.id'}) {
3270: if ($allpathcond) {
3271: my $operand='|';
3272: my @stack;
3273: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3274: if ($_ eq '(') {
3275: push @stack,($operand,$result)
3276: } elsif ($_ eq ')') {
3277: my $before=pop @stack;
3278: if (pop @stack eq '&') {
3279: $result=$result>$before?$before:$result;
3280: } else {
3281: $result=$result>$before?$result:$before;
3282: }
3283: } elsif (($_ eq '&') || ($_ eq '|')) {
3284: $operand=$_;
3285: } else {
3286: my $new=directcondval($_);
3287: if ($operand eq '&') {
3288: $result=$result>$new?$new:$result;
3289: } else {
3290: $result=$result>$new?$result:$new;
3291: }
3292: }
3293: }
3294: }
3295: }
3296: return $result;
3297: }
3298:
3299: # ---------------------------------------------------- Devalidate courseresdata
3300:
3301: sub devalidatecourseresdata {
3302: my ($coursenum,$coursedomain)=@_;
3303: my $hashid=$coursenum.':'.$coursedomain;
3304: &devalidate_cache(\%courseresdatacache,$hashid);
3305: }
3306:
3307: # --------------------------------------------------- Course Resourcedata Query
3308:
3309: sub courseresdata {
3310: my ($coursenum,$coursedomain,@which)=@_;
3311: my $coursehom=&homeserver($coursenum,$coursedomain);
3312: my $hashid=$coursenum.':'.$coursedomain;
3313: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid);
3314: unless (defined($cached)) {
3315: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3316: $result=\%dumpreply;
3317: my ($tmp) = keys(%dumpreply);
3318: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3319: &do_cache(\%courseresdatacache,$hashid,$result);
3320: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3321: return $tmp;
3322: } elsif ($tmp =~ /^(error)/) {
3323: $result=undef;
3324: &do_cache(\%courseresdatacache,$hashid,$result);
3325: }
3326: }
3327: foreach my $item (@which) {
3328: if (defined($result->{$item})) {
3329: return $result->{$item};
3330: }
3331: }
3332: return undef;
3333: }
3334:
3335: #
3336: # EXT resource caching routines
3337: #
3338:
3339: sub clear_EXT_cache_status {
3340: &delenv('cache.EXT.');
3341: }
3342:
3343: sub EXT_cache_status {
3344: my ($target_domain,$target_user) = @_;
3345: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3346: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
3347: # We know already the user has no data
3348: return 1;
3349: } else {
3350: return 0;
3351: }
3352: }
3353:
3354: sub EXT_cache_set {
3355: my ($target_domain,$target_user) = @_;
3356: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3357: &appenv($cachename => time);
3358: }
3359:
3360: # --------------------------------------------------------- Value of a Variable
3361: sub EXT {
3362: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
3363:
3364: unless ($varname) { return ''; }
3365: #get real user name/domain, courseid and symb
3366: my $courseid;
3367: my $publicuser;
3368: if (!($uname && $udom)) {
3369: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
3370: &Apache::lonxml::whichuser($symbparm);
3371: if (!$symbparm) { $symbparm=$cursymb; }
3372: } else {
3373: $courseid=$ENV{'request.course.id'};
3374: }
3375: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3376: my $rest;
3377: if (defined($therest[0])) {
3378: $rest=join('.',@therest);
3379: } else {
3380: $rest='';
3381: }
3382:
3383: my $qualifierrest=$qualifier;
3384: if ($rest) { $qualifierrest.='.'.$rest; }
3385: my $spacequalifierrest=$space;
3386: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
3387: if ($realm eq 'user') {
3388: # --------------------------------------------------------------- user.resource
3389: if ($space eq 'resource') {
3390: if (defined($Apache::lonhomework::parsing_a_problem)) {
3391: return $Apache::lonhomework::history{$qualifierrest};
3392: } else {
3393: my %restored;
3394: if ($publicuser || $ENV{'request.state'} eq 'construct') {
3395: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
3396: } else {
3397: %restored=&restore($symbparm,$courseid,$udom,$uname);
3398: }
3399: return $restored{$qualifierrest};
3400: }
3401: # ----------------------------------------------------------------- user.access
3402: } elsif ($space eq 'access') {
3403: # FIXME - not supporting calls for a specific user
3404: return &allowed($qualifier,$rest);
3405: # ------------------------------------------ user.preferences, user.environment
3406: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
3407: if (($uname eq $ENV{'user.name'}) &&
3408: ($udom eq $ENV{'user.domain'})) {
3409: return $ENV{join('.',('environment',$qualifierrest))};
3410: } else {
3411: my %returnhash;
3412: if (!$publicuser) {
3413: %returnhash=&userenvironment($udom,$uname,
3414: $qualifierrest);
3415: }
3416: return $returnhash{$qualifierrest};
3417: }
3418: # ----------------------------------------------------------------- user.course
3419: } elsif ($space eq 'course') {
3420: # FIXME - not supporting calls for a specific user
3421: return $ENV{join('.',('request.course',$qualifier))};
3422: # ------------------------------------------------------------------- user.role
3423: } elsif ($space eq 'role') {
3424: # FIXME - not supporting calls for a specific user
3425: my ($role,$where)=split(/\./,$ENV{'request.role'});
3426: if ($qualifier eq 'value') {
3427: return $role;
3428: } elsif ($qualifier eq 'extent') {
3429: return $where;
3430: }
3431: # ----------------------------------------------------------------- user.domain
3432: } elsif ($space eq 'domain') {
3433: return $udom;
3434: # ------------------------------------------------------------------- user.name
3435: } elsif ($space eq 'name') {
3436: return $uname;
3437: # ---------------------------------------------------- Any other user namespace
3438: } else {
3439: my %reply;
3440: if (!$publicuser) {
3441: %reply=&get($space,[$qualifierrest],$udom,$uname);
3442: }
3443: return $reply{$qualifierrest};
3444: }
3445: } elsif ($realm eq 'query') {
3446: # ---------------------------------------------- pull stuff out of query string
3447: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
3448: [$spacequalifierrest]);
3449: return $ENV{'form.'.$spacequalifierrest};
3450: } elsif ($realm eq 'request') {
3451: # ------------------------------------------------------------- request.browser
3452: if ($space eq 'browser') {
3453: return $ENV{'browser.'.$qualifier};
3454: # ------------------------------------------------------------ request.filename
3455: } else {
3456: return $ENV{'request.'.$spacequalifierrest};
3457: }
3458: } elsif ($realm eq 'course') {
3459: # ---------------------------------------------------------- course.description
3460: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3461: } elsif ($realm eq 'resource') {
3462:
3463: my $section;
3464: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
3465:
3466: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3467:
3468: # ----------------------------------------------------- Cascading lookup scheme
3469: if (!$symbparm) { $symbparm=&symbread(); }
3470: my $symbp=$symbparm;
3471: my $mapp=(&decode_symb($symbp))[0];
3472:
3473: my $symbparm=$symbp.'.'.$spacequalifierrest;
3474: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3475:
3476: if (($ENV{'user.name'} eq $uname) &&
3477: ($ENV{'user.domain'} eq $udom)) {
3478: $section=$ENV{'request.course.sec'};
3479: } else {
3480: if (! defined($usection)) {
3481: $section=&usection($udom,$uname,$courseid);
3482: } else {
3483: $section = $usection;
3484: }
3485: }
3486:
3487: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3488: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3489: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3490:
3491: my $courselevel=$courseid.'.'.$spacequalifierrest;
3492: my $courselevelr=$courseid.'.'.$symbparm;
3493: my $courselevelm=$courseid.'.'.$mapparm;
3494:
3495: # ----------------------------------------------------------- first, check user
3496: #most student don\'t have any data set, check if there is some data
3497: if (! &EXT_cache_status($udom,$uname)) {
3498: my $hashid="$udom:$uname";
3499: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid);
3500: if (!defined($cached)) {
3501: my %resourcedata=&get('resourcedata',
3502: [$courselevelr,$courselevelm,
3503: $courselevel],$udom,$uname);
3504: $result=\%resourcedata;
3505: }
3506: my ($tmp)=keys(%$result);
3507: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3508: &do_cache(\%userresdatacache,$hashid,$result);
3509: if ($$result{$courselevelr}) {
3510: return $$result{$courselevelr}; }
3511: if ($$result{$courselevelm}) {
3512: return $$result{$courselevelm}; }
3513: if ($$result{$courselevel}) {
3514: return $$result{$courselevel}; }
3515: } else {
3516: if ($tmp!~/No such file/) {
3517: &logthis("<font color=blue>WARNING:".
3518: " Trying to get resource data for ".
3519: $uname." at ".$udom.": ".
3520: $tmp."</font>");
3521: &do_cache(\%userresdatacache,$hashid,undef);
3522: } elsif ($tmp=~/error:No such file/) {
3523: &EXT_cache_set($udom,$uname);
3524: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3525: &do_cache(\%userresdatacache,$hashid,undef);
3526: return $tmp;
3527: }
3528: }
3529: }
3530:
3531: # -------------------------------------------------------- second, check course
3532:
3533: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3534: $ENV{'course.'.$courseid.'.domain'},
3535: ($seclevelr,$seclevelm,$seclevel,
3536: $courselevelr,$courselevelm,
3537: $courselevel));
3538: if (defined($coursereply)) { return $coursereply; }
3539:
3540: # ------------------------------------------------------ third, check map parms
3541: my %parmhash=();
3542: my $thisparm='';
3543: if (tie(%parmhash,'GDBM_File',
3544: $ENV{'request.course.fn'}.'_parms.db',
3545: &GDBM_READER(),0640)) {
3546: $thisparm=$parmhash{$symbparm};
3547: untie(%parmhash);
3548: }
3549: if ($thisparm) { return $thisparm; }
3550: }
3551: # --------------------------------------------- last, look in resource metadata
3552:
3553: $spacequalifierrest=~s/\./\_/;
3554: my $filename;
3555: if (!$symbparm) { $symbparm=&symbread(); }
3556: if ($symbparm) {
3557: $filename=(&decode_symb($symbparm))[2];
3558: } else {
3559: $filename=$ENV{'request.filename'};
3560: }
3561: my $metadata=&metadata($filename,$spacequalifierrest);
3562: if (defined($metadata)) { return $metadata; }
3563: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3564: if (defined($metadata)) { return $metadata; }
3565:
3566: # ------------------------------------------------------------------ Cascade up
3567: unless ($space eq '0') {
3568: my @parts=split(/_/,$space);
3569: my $id=pop(@parts);
3570: my $part=join('_',@parts);
3571: if ($part eq '') { $part='0'; }
3572: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3573: $symbparm,$udom,$uname,$section,1);
3574: if (defined($partgeneral)) { return $partgeneral; }
3575: }
3576: if ($recurse) { return undef; }
3577: my $pack_def=&packages_tab_default($filename,$varname);
3578: if (defined($pack_def)) { return $pack_def; }
3579:
3580: # ---------------------------------------------------- Any other user namespace
3581: } elsif ($realm eq 'environment') {
3582: # ----------------------------------------------------------------- environment
3583: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3584: return $ENV{'environment.'.$spacequalifierrest};
3585: } else {
3586: my %returnhash=&userenvironment($udom,$uname,
3587: $spacequalifierrest);
3588: return $returnhash{$spacequalifierrest};
3589: }
3590: } elsif ($realm eq 'system') {
3591: # ----------------------------------------------------------------- system.time
3592: if ($space eq 'time') {
3593: return time;
3594: }
3595: }
3596: return '';
3597: }
3598:
3599: sub packages_tab_default {
3600: my ($uri,$varname)=@_;
3601: my (undef,$part,$name)=split(/\./,$varname);
3602: my $packages=&metadata($uri,'packages');
3603: foreach my $package (split(/,/,$packages)) {
3604: my ($pack_type,$pack_part)=split(/_/,$package,2);
3605: if ($pack_part eq $part) {
3606: return $packagetab{"$pack_type&$name&default"};
3607: }
3608: }
3609: return undef;
3610: }
3611:
3612: sub add_prefix_and_part {
3613: my ($prefix,$part)=@_;
3614: my $keyroot;
3615: if (defined($prefix) && $prefix !~ /^__/) {
3616: # prefix that has a part already
3617: $keyroot=$prefix;
3618: } elsif (defined($prefix)) {
3619: # prefix that is missing a part
3620: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3621: } else {
3622: # no prefix at all
3623: if (defined($part)) { $keyroot='_'.$part; }
3624: }
3625: return $keyroot;
3626: }
3627:
3628: # ---------------------------------------------------------------- Get metadata
3629:
3630: sub metadata {
3631: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3632: $uri=&declutter($uri);
3633: # if it is a non metadata possible uri return quickly
3634: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3635: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
3636: ($uri =~ m|home/[^/]+/public_html/|)) {
3637: return '';
3638: }
3639: my $filename=$uri;
3640: $uri=~s/\.meta$//;
3641: #
3642: # Is the metadata already cached?
3643: # Look at timestamp of caching
3644: # Everything is cached by the main uri, libraries are never directly cached
3645: #
3646: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3647: #
3648: # Is this a recursive call for a library?
3649: #
3650: if ($liburi) {
3651: $liburi=&declutter($liburi);
3652: $filename=$liburi;
3653: } else {
3654: delete($metacache{$uri.':packages'});
3655: }
3656: my %metathesekeys=();
3657: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3658: my $metastring=&getfile(&filelocation('',&clutter($filename)));
3659: my $parser=HTML::LCParser->new(\$metastring);
3660: my $token;
3661: undef %metathesekeys;
3662: while ($token=$parser->get_token) {
3663: if ($token->[0] eq 'S') {
3664: if (defined($token->[2]->{'package'})) {
3665: #
3666: # This is a package - get package info
3667: #
3668: my $package=$token->[2]->{'package'};
3669: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3670: if (defined($token->[2]->{'id'})) {
3671: $keyroot.='_'.$token->[2]->{'id'};
3672: }
3673: if ($metacache{$uri.':packages'}) {
3674: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3675: } else {
3676: $metacache{$uri.':packages'}=$package.$keyroot;
3677: }
3678: foreach (keys %packagetab) {
3679: if ($_=~/^$package\&/) {
3680: my ($pack,$name,$subp)=split(/\&/,$_);
3681: # ignore package.tab specified default values
3682: # here &package_tab_default() will fetch those
3683: if ($subp eq 'default') { next; }
3684: my $value=$packagetab{$_};
3685: my $part=$keyroot;
3686: $part=~s/^\_//;
3687: if ($subp eq 'display') {
3688: $value.=' [Part: '.$part.']';
3689: }
3690: my $unikey='parameter'.$keyroot.'_'.$name;
3691: $metacache{$uri.':'.$unikey.'.part'}=$part;
3692: $metathesekeys{$unikey}=1;
3693: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3694: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3695: }
3696: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3697: $metacache{$uri.':'.$unikey}=
3698: $metacache{$uri.':'.$unikey.'.default'};
3699: }
3700: }
3701: }
3702: } else {
3703: #
3704: # This is not a package - some other kind of start tag
3705: #
3706: my $entry=$token->[1];
3707: my $unikey;
3708: if ($entry eq 'import') {
3709: $unikey='';
3710: } else {
3711: $unikey=$entry;
3712: }
3713: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3714:
3715: if (defined($token->[2]->{'id'})) {
3716: $unikey.='_'.$token->[2]->{'id'};
3717: }
3718:
3719: if ($entry eq 'import') {
3720: #
3721: # Importing a library here
3722: #
3723: if ($depthcount<20) {
3724: my $location=$parser->get_text('/import');
3725: my $dir=$filename;
3726: $dir=~s|[^/]*$||;
3727: $location=&filelocation($dir,$location);
3728: foreach (sort(split(/\,/,&metadata($uri,'keys',
3729: $location,$unikey,
3730: $depthcount+1)))) {
3731: $metathesekeys{$_}=1;
3732: }
3733: }
3734: } else {
3735:
3736: if (defined($token->[2]->{'name'})) {
3737: $unikey.='_'.$token->[2]->{'name'};
3738: }
3739: $metathesekeys{$unikey}=1;
3740: foreach (@{$token->[3]}) {
3741: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3742: }
3743: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3744: my $default=$metacache{$uri.':'.$unikey.'.default'};
3745: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3746: # only ws inside the tag, and not in default, so use default
3747: # as value
3748: $metacache{$uri.':'.$unikey}=$default;
3749: } else {
3750: # either something interesting inside the tag or default
3751: # uninteresting
3752: $metacache{$uri.':'.$unikey}=$internaltext;
3753: }
3754: # end of not-a-package not-a-library import
3755: }
3756: # end of not-a-package start tag
3757: }
3758: # the next is the end of "start tag"
3759: }
3760: }
3761: # are there custom rights to evaluate
3762: if ($metacache{$uri.':copyright'} eq 'custom') {
3763:
3764: #
3765: # Importing a rights file here
3766: #
3767: unless ($depthcount) {
3768: my $location=$metacache{$uri.':customdistributionfile'};
3769: my $dir=$filename;
3770: $dir=~s|[^/]*$||;
3771: $location=&filelocation($dir,$location);
3772: foreach (sort(split(/\,/,&metadata($uri,'keys',
3773: $location,'_rights',
3774: $depthcount+1)))) {
3775: $metathesekeys{$_}=1;
3776: }
3777: }
3778: }
3779: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3780: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3781: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3782: $metacache{$uri.':cachedtimestamp'}=time;
3783: # this is the end of "was not already recently cached
3784: }
3785: return $metacache{$uri.':'.$what};
3786: }
3787:
3788: sub metadata_generate_part0 {
3789: my ($metadata,$metacache,$uri) = @_;
3790: my %allnames;
3791: foreach my $metakey (sort keys %$metadata) {
3792: if ($metakey=~/^parameter\_(.*)/) {
3793: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3794: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3795: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
3796: $allnames{$name}=$part;
3797: }
3798: }
3799: }
3800: foreach my $name (keys(%allnames)) {
3801: $$metadata{"parameter_0_$name"}=1;
3802: my $key="$uri:parameter_0_$name";
3803: $$metacache{"$key.part"}='0';
3804: $$metacache{"$key.name"}=$name;
3805: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3806: $allnames{$name}.'_'.$name.
3807: '.type'};
3808: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3809: '.display'};
3810: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3811: $olddis=~s/$expr/\[Part: 0\]/;
3812: $$metacache{"$key.display"}=$olddis;
3813: }
3814: }
3815:
3816: # ------------------------------------------------- Get the title of a resource
3817:
3818: sub gettitle {
3819: my $urlsymb=shift;
3820: my $symb=&symbread($urlsymb);
3821: unless ($symb) {
3822: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3823: return &metadata($urlsymb,'title');
3824: }
3825: my ($result,$cached)=&is_cached(\%titlecache,$symb,600);
3826: if (defined($cached)) { return $result; }
3827: my ($map,$resid,$url)=&decode_symb($symb);
3828: my $title='';
3829: my %bighash;
3830: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3831: &GDBM_READER(),0640)) {
3832: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3833: $title=$bighash{'title_'.$mapid.'.'.$resid};
3834: untie %bighash;
3835: }
3836: $title=~s/\&colon\;/\:/gs;
3837: if ($title) {
3838: return &do_cache(\%titlecache,$symb,$title);
3839: } else {
3840: return &metadata($urlsymb,'title');
3841: }
3842: }
3843:
3844: # ------------------------------------------------- Update symbolic store links
3845:
3846: sub symblist {
3847: my ($mapname,%newhash)=@_;
3848: $mapname=declutter($mapname);
3849: my %hash;
3850: if (($ENV{'request.course.fn'}) && (%newhash)) {
3851: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3852: &GDBM_WRCREAT(),0640)) {
3853: foreach (keys %newhash) {
3854: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3855: }
3856: if (untie(%hash)) {
3857: return 'ok';
3858: }
3859: }
3860: }
3861: return 'error';
3862: }
3863:
3864: # --------------------------------------------------------------- Verify a symb
3865:
3866: sub symbverify {
3867: my ($symb,$thisfn)=@_;
3868: $thisfn=&declutter($thisfn);
3869: # direct jump to resource in page or to a sequence - will construct own symbs
3870: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3871: # check URL part
3872: my ($map,$resid,$url)=&decode_symb($symb);
3873: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3874:
3875: $symb=&symbclean($symb);
3876:
3877: my %bighash;
3878: my $okay=0;
3879: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3880: &GDBM_READER(),0640)) {
3881: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3882: unless ($ids) {
3883: $ids=$bighash{'ids_/'.$thisfn};
3884: }
3885: if ($ids) {
3886: # ------------------------------------------------------------------- Has ID(s)
3887: foreach (split(/\,/,$ids)) {
3888: my ($mapid,$resid)=split(/\./,$_);
3889: if (
3890: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3891: eq $symb) {
3892: $okay=1;
3893: }
3894: }
3895: }
3896: untie(%bighash);
3897: }
3898: return $okay;
3899: }
3900:
3901: # --------------------------------------------------------------- Clean-up symb
3902:
3903: sub symbclean {
3904: my $symb=shift;
3905:
3906: # remove version from map
3907: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3908:
3909: # remove version from URL
3910: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3911:
3912: return $symb;
3913: }
3914:
3915: # ---------------------------------------------- Split symb to find map and url
3916:
3917: sub decode_symb {
3918: my ($map,$resid,$url)=split(/\_\_\_/,shift);
3919: return (&fixversion($map),$resid,&fixversion($url));
3920: }
3921:
3922: sub fixversion {
3923: my $fn=shift;
3924: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
3925: my ($match,$cond,$versioned)=&is_on_map($fn);
3926: unless ($match) {
3927: $fn=$versioned;
3928: }
3929: return $fn;
3930: }
3931:
3932: # ------------------------------------------------------ Return symb list entry
3933:
3934: sub symbread {
3935: my ($thisfn,$donotrecurse)=@_;
3936: # no filename provided? try from environment
3937: unless ($thisfn) {
3938: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3939: $thisfn=$ENV{'request.filename'};
3940: }
3941: # is that filename actually a symb? Verify, clean, and return
3942: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3943: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3944: }
3945: $thisfn=declutter($thisfn);
3946: my %hash;
3947: my %bighash;
3948: my $syval='';
3949: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3950: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3951: &GDBM_READER(),0640)) {
3952: $syval=$hash{$thisfn};
3953: untie(%hash);
3954: }
3955: # ---------------------------------------------------------- There was an entry
3956: if ($syval) {
3957: unless ($syval=~/\_\d+$/) {
3958: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3959: &appenv('request.ambiguous' => $thisfn);
3960: return '';
3961: }
3962: $syval.=$1;
3963: }
3964: } else {
3965: # ------------------------------------------------------- Was not in symb table
3966: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3967: &GDBM_READER(),0640)) {
3968: # ---------------------------------------------- Get ID(s) for current resource
3969: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3970: unless ($ids) {
3971: $ids=$bighash{'ids_/'.$thisfn};
3972: }
3973: unless ($ids) {
3974: # alias?
3975: $ids=$bighash{'mapalias_'.$thisfn};
3976: }
3977: if ($ids) {
3978: # ------------------------------------------------------------------- Has ID(s)
3979: my @possibilities=split(/\,/,$ids);
3980: if ($#possibilities==0) {
3981: # ----------------------------------------------- There is only one possibility
3982: my ($mapid,$resid)=split(/\./,$ids);
3983: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3984: } elsif (!$donotrecurse) {
3985: # ------------------------------------------ There is more than one possibility
3986: my $realpossible=0;
3987: foreach (@possibilities) {
3988: my $file=$bighash{'src_'.$_};
3989: if (&allowed('bre',$file)) {
3990: my ($mapid,$resid)=split(/\./,$_);
3991: if ($bighash{'map_type_'.$mapid} ne 'page') {
3992: $realpossible++;
3993: $syval=declutter($bighash{'map_id_'.$mapid}).
3994: '___'.$resid;
3995: }
3996: }
3997: }
3998: if ($realpossible!=1) { $syval=''; }
3999: } else {
4000: $syval='';
4001: }
4002: }
4003: untie(%bighash)
4004: }
4005: }
4006: if ($syval) {
4007: return &symbclean($syval.'___'.$thisfn);
4008: }
4009: }
4010: &appenv('request.ambiguous' => $thisfn);
4011: return '';
4012: }
4013:
4014: # ---------------------------------------------------------- Return random seed
4015:
4016: sub numval {
4017: my $txt=shift;
4018: $txt=~tr/A-J/0-9/;
4019: $txt=~tr/a-j/0-9/;
4020: $txt=~tr/K-T/0-9/;
4021: $txt=~tr/k-t/0-9/;
4022: $txt=~tr/U-Z/0-5/;
4023: $txt=~tr/u-z/0-5/;
4024: $txt=~s/\D//g;
4025: return int($txt);
4026: }
4027:
4028: sub latest_rnd_algorithm_id {
4029: return '64bit';
4030: }
4031:
4032: sub rndseed {
4033: my ($symb,$courseid,$domain,$username)=@_;
4034:
4035: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
4036: if (!$symb) {
4037: unless ($symb=$wsymb) { return time; }
4038: }
4039: if (!$courseid) { $courseid=$wcourseid; }
4040: if (!$domain) { $domain=$wdomain; }
4041: if (!$username) { $username=$wusername }
4042: my $which=$ENV{"course.$courseid.rndseed"};
4043: my $CODE=$ENV{'scantron.CODE'};
4044: if (defined($CODE)) {
4045: &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
4046: } elsif ($which eq '64bit') {
4047: return &rndseed_64bit($symb,$courseid,$domain,$username);
4048: }
4049: return &rndseed_32bit($symb,$courseid,$domain,$username);
4050: }
4051:
4052: sub rndseed_32bit {
4053: my ($symb,$courseid,$domain,$username)=@_;
4054: {
4055: use integer;
4056: my $symbchck=unpack("%32C*",$symb) << 27;
4057: my $symbseed=numval($symb) << 22;
4058: my $namechck=unpack("%32C*",$username) << 17;
4059: my $nameseed=numval($username) << 12;
4060: my $domainseed=unpack("%32C*",$domain) << 7;
4061: my $courseseed=unpack("%32C*",$courseid);
4062: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4063: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4064: #&Apache::lonxml::debug("rndseed :$num:$symb");
4065: return $num;
4066: }
4067: }
4068:
4069: sub rndseed_64bit {
4070: my ($symb,$courseid,$domain,$username)=@_;
4071: {
4072: use integer;
4073: my $symbchck=unpack("%32S*",$symb) << 21;
4074: my $symbseed=numval($symb) << 10;
4075: my $namechck=unpack("%32S*",$username);
4076:
4077: my $nameseed=numval($username) << 21;
4078: my $domainseed=unpack("%32S*",$domain) << 10;
4079: my $courseseed=unpack("%32S*",$courseid);
4080:
4081: my $num1=$symbchck+$symbseed+$namechck;
4082: my $num2=$nameseed+$domainseed+$courseseed;
4083: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4084: #&Apache::lonxml::debug("rndseed :$num:$symb");
4085: return "$num1,$num2";
4086: }
4087: }
4088:
4089: sub rndseed_CODE_64bit {
4090: my ($symb,$courseid,$domain,$username)=@_;
4091: {
4092: use integer;
4093: my $symbchck=unpack("%32S*",$symb) << 16;
4094: my $symbseed=numval($symb);
4095: my $CODEseed=numval($ENV{'scantron.CODE'}) << 16;
4096: my $courseseed=unpack("%32S*",$courseid);
4097: my $num1=$symbseed+$CODEseed;
4098: my $num2=$courseseed+$symbchck;
4099: #&Apache::lonxml::debug("$symbseed:$CODEseed|$courseseed:$symbchck");
4100: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
4101: return "$num1,$num2";
4102: }
4103: }
4104:
4105: sub setup_random_from_rndseed {
4106: my ($rndseed)=@_;
4107: if ($rndseed =~/,/) {
4108: my ($num1,$num2)=split(/,/,$rndseed);
4109: &Math::Random::random_set_seed(abs($num1),abs($num2));
4110: } else {
4111: &Math::Random::random_set_seed_from_phrase($rndseed);
4112: }
4113: }
4114:
4115: sub ireceipt {
4116: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
4117: my $cuname=unpack("%32C*",$funame);
4118: my $cudom=unpack("%32C*",$fudom);
4119: my $cucourseid=unpack("%32C*",$fucourseid);
4120: my $cusymb=unpack("%32C*",$fusymb);
4121: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
4122: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
4123: ($cunique%$cuname+
4124: $cunique%$cudom+
4125: $cusymb%$cuname+
4126: $cusymb%$cudom+
4127: $cucourseid%$cuname+
4128: $cucourseid%$cudom);
4129: }
4130:
4131: sub receipt {
4132: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
4133: return &ireceipt($name,$domain,$courseid,$symb);
4134: }
4135:
4136: # ------------------------------------------------------------ Serves up a file
4137: # returns either the contents of the file or a -1
4138: sub getfile {
4139: my $file=shift;
4140: if ($file=~/^\/*uploaded\//) { # user file
4141: my $ua=new LWP::UserAgent;
4142: my $request=new HTTP::Request('GET',&tokenwrapper($file));
4143: my $response=$ua->request($request);
4144: if ($response->is_success()) {
4145: return $response->content;
4146: } else {
4147: return -1;
4148: }
4149: } else { # normal file from res space
4150: &repcopy($file);
4151: if (! -e $file ) { return -1; };
4152: my $fh=Apache::File->new($file);
4153: my $a='';
4154: while (<$fh>) { $a .=$_; }
4155: return $a;
4156: }
4157: }
4158:
4159: sub filelocation {
4160: my ($dir,$file) = @_;
4161: my $location;
4162: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
4163: if ($file=~m:^/~:) { # is a contruction space reference
4164: $location = $file;
4165: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
4166: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
4167: $location=$file;
4168: } else {
4169: $file=~s/^$perlvar{'lonDocRoot'}//;
4170: $file=~s:^/*res::;
4171: if ( !( $file =~ m:^/:) ) {
4172: $location = $dir. '/'.$file;
4173: } else {
4174: $location = '/home/httpd/html/res'.$file;
4175: }
4176: }
4177: $location=~s://+:/:g; # remove duplicate /
4178: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
4179: return $location;
4180: }
4181:
4182: sub hreflocation {
4183: my ($dir,$file)=@_;
4184: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
4185: my $finalpath=filelocation($dir,$file);
4186: $finalpath=~s/^\/home\/httpd\/html//;
4187: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
4188: return $finalpath;
4189: } else {
4190: return $file;
4191: }
4192: }
4193:
4194: # ------------------------------------------------------------- Declutters URLs
4195:
4196: sub declutter {
4197: my $thisfn=shift;
4198: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
4199: $thisfn=~s/^\///;
4200: $thisfn=~s/^res\///;
4201: $thisfn=~s/\?.+$//;
4202: return $thisfn;
4203: }
4204:
4205: # ------------------------------------------------------------- Clutter up URLs
4206:
4207: sub clutter {
4208: my $thisfn='/'.&declutter(shift);
4209: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
4210: $thisfn='/res'.$thisfn;
4211: }
4212: return $thisfn;
4213: }
4214:
4215: # -------------------------------------------------------- Escape Special Chars
4216:
4217: sub escape {
4218: my $str=shift;
4219: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4220: return $str;
4221: }
4222:
4223: # ----------------------------------------------------- Un-Escape Special Chars
4224:
4225: sub unescape {
4226: my $str=shift;
4227: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4228: return $str;
4229: }
4230:
4231: sub mod_perl_version {
4232: if (defined($perlvar{'MODPERL2'})) {
4233: return 2;
4234: }
4235: return 1;
4236: }
4237: # ================================================================ Main Program
4238:
4239: sub goodbye {
4240: &logthis("Starting Shut down");
4241: &flushcourselogs();
4242: &logthis("Shutting down");
4243: return DONE;
4244: }
4245:
4246: BEGIN {
4247: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
4248: unless ($readit) {
4249: {
4250: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
4251:
4252: while (my $configline=<$config>) {
4253: if ($configline =~ /^[^\#]*PerlSetVar/) {
4254: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4255: chomp($varvalue);
4256: $perlvar{$varname}=$varvalue;
4257: }
4258: }
4259: }
4260: {
4261: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
4262:
4263: while (my $configline=<$config>) {
4264: if ($configline =~ /^[^\#]*PerlSetVar/) {
4265: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4266: chomp($varvalue);
4267: $perlvar{$varname}=$varvalue;
4268: }
4269: }
4270: }
4271:
4272: # ------------------------------------------------------------ Read domain file
4273: {
4274: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
4275: '/domain.tab');
4276: %domaindescription = ();
4277: %domain_auth_def = ();
4278: %domain_auth_arg_def = ();
4279: if ($fh) {
4280: while (<$fh>) {
4281: next if (/^(\#|\s*$)/);
4282: # next if /^\#/;
4283: chomp;
4284: my ($domain, $domain_description, $def_auth, $def_auth_arg,
4285: $def_lang, $city, $longi, $lati) = split(/:/,$_);
4286: $domain_auth_def{$domain}=$def_auth;
4287: $domain_auth_arg_def{$domain}=$def_auth_arg;
4288: $domaindescription{$domain}=$domain_description;
4289: $domain_lang_def{$domain}=$def_lang;
4290: $domain_city{$domain}=$city;
4291: $domain_longi{$domain}=$longi;
4292: $domain_lati{$domain}=$lati;
4293:
4294: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
4295: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
4296: }
4297: }
4298: }
4299:
4300:
4301: # ------------------------------------------------------------- Read hosts file
4302: {
4303: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
4304:
4305: while (my $configline=<$config>) {
4306: next if ($configline =~ /^(\#|\s*$)/);
4307: chomp($configline);
4308: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
4309: if ($id && $domain && $role && $name && $ip) {
4310: $hostname{$id}=$name;
4311: $hostdom{$id}=$domain;
4312: $hostip{$id}=$ip;
4313: $iphost{$ip}=$id;
4314: if ($role eq 'library') { $libserv{$id}=$name; }
4315: } else {
4316: if ($configline) {
4317: &logthis("Skipping hosts.tab line -$configline-");
4318: }
4319: }
4320: }
4321: }
4322:
4323: # ------------------------------------------------------ Read spare server file
4324: {
4325: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
4326:
4327: while (my $configline=<$config>) {
4328: chomp($configline);
4329: if ($configline) {
4330: $spareid{$configline}=1;
4331: }
4332: }
4333: }
4334: # ------------------------------------------------------------ Read permissions
4335: {
4336: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
4337:
4338: while (my $configline=<$config>) {
4339: chomp($configline);
4340: if ($configline) {
4341: my ($role,$perm)=split(/ /,$configline);
4342: if ($perm ne '') { $pr{$role}=$perm; }
4343: }
4344: }
4345: }
4346:
4347: # -------------------------------------------- Read plain texts for permissions
4348: {
4349: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
4350:
4351: while (my $configline=<$config>) {
4352: chomp($configline);
4353: if ($configline) {
4354: my ($short,$plain)=split(/:/,$configline);
4355: if ($plain ne '') { $prp{$short}=$plain; }
4356: }
4357: }
4358: }
4359:
4360: # ---------------------------------------------------------- Read package table
4361: {
4362: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
4363:
4364: while (my $configline=<$config>) {
4365: chomp($configline);
4366: my ($short,$plain)=split(/:/,$configline);
4367: my ($pack,$name)=split(/\&/,$short);
4368: if ($plain ne '') {
4369: $packagetab{$pack.'&'.$name.'&name'}=$name;
4370: $packagetab{$short}=$plain;
4371: }
4372: }
4373: }
4374:
4375: # ------------- set up temporary directory
4376: {
4377: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
4378:
4379: }
4380:
4381: %metacache=();
4382:
4383: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
4384: $dumpcount=0;
4385:
4386: &logtouch();
4387: &logthis('<font color=yellow>INFO: Read configuration</font>');
4388: $readit=1;
4389: }
4390: }
4391:
4392: 1;
4393: __END__
4394:
4395: =pod
4396:
4397: =head1 NAME
4398:
4399: Apache::lonnet - Subroutines to ask questions about things in the network.
4400:
4401: =head1 SYNOPSIS
4402:
4403: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
4404:
4405: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
4406:
4407: Common parameters:
4408:
4409: =over 4
4410:
4411: =item *
4412:
4413: $uname : an internal username (if $cname expecting a course Id specifically)
4414:
4415: =item *
4416:
4417: $udom : a domain (if $cdom expecting a course's domain specifically)
4418:
4419: =item *
4420:
4421: $symb : a resource instance identifier
4422:
4423: =item *
4424:
4425: $namespace : the name of a .db file that contains the data needed or
4426: being set.
4427:
4428: =back
4429:
4430: =head1 OVERVIEW
4431:
4432: lonnet provides subroutines which interact with the
4433: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
4434: about classes, users, and resources.
4435:
4436: For many of these objects you can also use this to store data about
4437: them or modify them in various ways.
4438:
4439: =head2 Symbs
4440:
4441: To identify a specific instance of a resource, LON-CAPA uses symbols
4442: or "symbs"X<symb>. These identifiers are built from the URL of the
4443: map, the resource number of the resource in the map, and the URL of
4444: the resource itself. The latter is somewhat redundant, but might help
4445: if maps change.
4446:
4447: An example is
4448:
4449: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
4450:
4451: The respective map entry is
4452:
4453: <resource id="19" src="/res/msu/korte/tests/part12.problem"
4454: title="Problem 2">
4455: </resource>
4456:
4457: Symbs are used by the random number generator, as well as to store and
4458: restore data specific to a certain instance of for example a problem.
4459:
4460: =head2 Storing And Retrieving Data
4461:
4462: X<store()>X<cstore()>X<restore()>Three of the most important functions
4463: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
4464: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
4465: is is the non-critical message twin of cstore. These functions are for
4466: handlers to store a perl hash to a user's permanent data space in an
4467: easy manner, and to retrieve it again on another call. It is expected
4468: that a handler would use this once at the beginning to retrieve data,
4469: and then again once at the end to send only the new data back.
4470:
4471: The data is stored in the user's data directory on the user's
4472: homeserver under the ID of the course.
4473:
4474: The hash that is returned by restore will have all of the previous
4475: value for all of the elements of the hash.
4476:
4477: Example:
4478:
4479: #creating a hash
4480: my %hash;
4481: $hash{'foo'}='bar';
4482:
4483: #storing it
4484: &Apache::lonnet::cstore(\%hash);
4485:
4486: #changing a value
4487: $hash{'foo'}='notbar';
4488:
4489: #adding a new value
4490: $hash{'bar'}='foo';
4491: &Apache::lonnet::cstore(\%hash);
4492:
4493: #retrieving the hash
4494: my %history=&Apache::lonnet::restore();
4495:
4496: #print the hash
4497: foreach my $key (sort(keys(%history))) {
4498: print("\%history{$key} = $history{$key}");
4499: }
4500:
4501: Will print out:
4502:
4503: %history{1:foo} = bar
4504: %history{1:keys} = foo:timestamp
4505: %history{1:timestamp} = 990455579
4506: %history{2:bar} = foo
4507: %history{2:foo} = notbar
4508: %history{2:keys} = foo:bar:timestamp
4509: %history{2:timestamp} = 990455580
4510: %history{bar} = foo
4511: %history{foo} = notbar
4512: %history{timestamp} = 990455580
4513: %history{version} = 2
4514:
4515: Note that the special hash entries C<keys>, C<version> and
4516: C<timestamp> were added to the hash. C<version> will be equal to the
4517: total number of versions of the data that have been stored. The
4518: C<timestamp> attribute will be the UNIX time the hash was
4519: stored. C<keys> is available in every historical section to list which
4520: keys were added or changed at a specific historical revision of a
4521: hash.
4522:
4523: B<Warning>: do not store the hash that restore returns directly. This
4524: will cause a mess since it will restore the historical keys as if the
4525: were new keys. I.E. 1:foo will become 1:1:foo etc.
4526:
4527: Calling convention:
4528:
4529: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
4530: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
4531:
4532: For more detailed information, see lonnet specific documentation.
4533:
4534: =head1 RETURN MESSAGES
4535:
4536: =over 4
4537:
4538: =item * B<con_lost>: unable to contact remote host
4539:
4540: =item * B<con_delayed>: unable to contact remote host, message will be delivered
4541: when the connection is brought back up
4542:
4543: =item * B<con_failed>: unable to contact remote host and unable to save message
4544: for later delivery
4545:
4546: =item * B<error:>: an error a occured, a description of the error follows the :
4547:
4548: =item * B<no_such_host>: unable to fund a host associated with the user/domain
4549: that was requested
4550:
4551: =back
4552:
4553: =head1 PUBLIC SUBROUTINES
4554:
4555: =head2 Session Environment Functions
4556:
4557: =over 4
4558:
4559: =item *
4560: X<appenv()>
4561: B<appenv(%hash)>: the value of %hash is written to
4562: the user envirnoment file, and will be restored for each access this
4563: user makes during this session, also modifies the %ENV for the current
4564: process
4565:
4566: =item *
4567: X<delenv()>
4568: B<delenv($regexp)>: removes all items from the session
4569: environment file that matches the regular expression in $regexp. The
4570: values are also delted from the current processes %ENV.
4571:
4572: =back
4573:
4574: =head2 User Information
4575:
4576: =over 4
4577:
4578: =item *
4579: X<queryauthenticate()>
4580: B<queryauthenticate($uname,$udom)>: try to determine user's current
4581: authentication scheme
4582:
4583: =item *
4584: X<authenticate()>
4585: B<authenticate($uname,$upass,$udom)>: try to
4586: authenticate user from domain's lib servers (first use the current
4587: one). C<$upass> should be the users password.
4588:
4589: =item *
4590: X<homeserver()>
4591: B<homeserver($uname,$udom)>: find the server which has
4592: the user's directory and files (there must be only one), this caches
4593: the answer, and also caches if there is a borken connection.
4594:
4595: =item *
4596: X<idget()>
4597: B<idget($udom,@ids)>: find the usernames behind a list of IDs
4598: (IDs are a unique resource in a domain, there must be only 1 ID per
4599: username, and only 1 username per ID in a specific domain) (returns
4600: hash: id=>name,id=>name)
4601:
4602: =item *
4603: X<idrget()>
4604: B<idrget($udom,@unames)>: find the IDs behind a list of
4605: usernames (returns hash: name=>id,name=>id)
4606:
4607: =item *
4608: X<idput()>
4609: B<idput($udom,%ids)>: store away a list of names and associated IDs
4610:
4611: =item *
4612: X<rolesinit()>
4613: B<rolesinit($udom,$username,$authhost)>: get user privileges
4614:
4615: =item *
4616: X<usection()>
4617: B<usection($udom,$uname,$cname)>: finds the section of student in the
4618: course $cname, return section name/number or '' for "not in course"
4619: and '-1' for "no section"
4620:
4621: =item *
4622: X<userenvironment()>
4623: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
4624: passed in @what from the requested user's environment, returns a hash
4625:
4626: =back
4627:
4628: =head2 User Roles
4629:
4630: =over 4
4631:
4632: =item *
4633:
4634: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
4635: actions
4636: F: full access
4637: U,I,K: authentication modes (cxx only)
4638: '': forbidden
4639: 1: user needs to choose course
4640: 2: browse allowed
4641:
4642: =item *
4643:
4644: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4645: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4646: and course level
4647:
4648: =item *
4649:
4650: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4651: explanation of a user role term
4652:
4653: =back
4654:
4655: =head2 User Modification
4656:
4657: =over 4
4658:
4659: =item *
4660:
4661: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4662: user for the level given by URL. Optional start and end dates (leave empty
4663: string or zero for "no date")
4664:
4665: =item *
4666:
4667: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4668: change a users, password, possible return values are: ok,
4669: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4670: refused
4671:
4672: =item *
4673:
4674: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
4675:
4676: =item *
4677:
4678: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4679: modify user
4680:
4681: =item *
4682:
4683: modifystudent
4684:
4685: modify a students enrollment and identification information.
4686: The course id is resolved based on the current users environment.
4687: This means the envoking user must be a course coordinator or otherwise
4688: associated with a course.
4689:
4690: This call is essentially a wrapper for lonnet::modifyuser and
4691: lonnet::modify_student_enrollment
4692:
4693: Inputs:
4694:
4695: =over 4
4696:
4697: =item B<$udom> Students loncapa domain
4698:
4699: =item B<$uname> Students loncapa login name
4700:
4701: =item B<$uid> Students id/student number
4702:
4703: =item B<$umode> Students authentication mode
4704:
4705: =item B<$upass> Students password
4706:
4707: =item B<$first> Students first name
4708:
4709: =item B<$middle> Students middle name
4710:
4711: =item B<$last> Students last name
4712:
4713: =item B<$gene> Students generation
4714:
4715: =item B<$usec> Students section in course
4716:
4717: =item B<$end> Unix time of the roles expiration
4718:
4719: =item B<$start> Unix time of the roles start date
4720:
4721: =item B<$forceid> If defined, allow $uid to be changed
4722:
4723: =item B<$desiredhome> server to use as home server for student
4724:
4725: =back
4726:
4727: =item *
4728:
4729: modify_student_enrollment
4730:
4731: Change a students enrollment status in a class. The environment variable
4732: 'role.request.course' must be defined for this function to proceed.
4733:
4734: Inputs:
4735:
4736: =over 4
4737:
4738: =item $udom, students domain
4739:
4740: =item $uname, students name
4741:
4742: =item $uid, students user id
4743:
4744: =item $first, students first name
4745:
4746: =item $middle
4747:
4748: =item $last
4749:
4750: =item $gene
4751:
4752: =item $usec
4753:
4754: =item $end
4755:
4756: =item $start
4757:
4758: =back
4759:
4760:
4761: =item *
4762:
4763: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4764: custom role; give a custom role to a user for the level given by URL. Specify
4765: name and domain of role author, and role name
4766:
4767: =item *
4768:
4769: revokerole($udom,$uname,$url,$role) : revoke a role for url
4770:
4771: =item *
4772:
4773: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4774:
4775: =back
4776:
4777: =head2 Course Infomation
4778:
4779: =over 4
4780:
4781: =item *
4782:
4783: coursedescription($courseid) : course description
4784:
4785: =item *
4786:
4787: courseresdata($coursenum,$coursedomain,@which) : request for current
4788: parameter setting for a specific course, @what should be a list of
4789: parameters to ask about. This routine caches answers for 5 minutes.
4790:
4791: =back
4792:
4793: =head2 Course Modification
4794:
4795: =over 4
4796:
4797: =item *
4798:
4799: writecoursepref($courseid,%prefs) : write preferences (environment
4800: database) for a course
4801:
4802: =item *
4803:
4804: createcourse($udom,$description,$url) : make/modify course
4805:
4806: =back
4807:
4808: =head2 Resource Subroutines
4809:
4810: =over 4
4811:
4812: =item *
4813:
4814: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
4815:
4816: =item *
4817:
4818: repcopy($filename) : subscribes to the requested file, and attempts to
4819: replicate from the owning library server, Might return
4820: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4821: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4822: resource. Expects the local filesystem pathname
4823: (/home/httpd/html/res/....)
4824:
4825: =back
4826:
4827: =head2 Resource Information
4828:
4829: =over 4
4830:
4831: =item *
4832:
4833: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4834: a vairety of different possible values, $varname should be a request
4835: string, and the other parameters can be used to specify who and what
4836: one is asking about.
4837:
4838: Possible values for $varname are environment.lastname (or other item
4839: from the envirnment hash), user.name (or someother aspect about the
4840: user), resource.0.maxtries (or some other part and parameter of a
4841: resource)
4842:
4843: =item *
4844:
4845: directcondval($number) : get current value of a condition; reads from a state
4846: string
4847:
4848: =item *
4849:
4850: condval($condidx) : value of condition index based on state
4851:
4852: =item *
4853:
4854: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4855: resource's metadata, $what should be either a specific key, or either
4856: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4857: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4858:
4859: this function automatically caches all requests
4860:
4861: =item *
4862:
4863: metadata_query($query,$custom,$customshow) : make a metadata query against the
4864: network of library servers; returns file handle of where SQL and regex results
4865: will be stored for query
4866:
4867: =item *
4868:
4869: symbread($filename) : return symbolic list entry (filename argument optional);
4870: returns the data handle
4871:
4872: =item *
4873:
4874: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4875: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4876: failure, user must be in a course, as it assumes the existance of the
4877: course initi hash, and uses $ENV('request.course.id'}
4878:
4879:
4880: =item *
4881:
4882: symbclean($symb) : removes versions numbers from a symb, returns the
4883: cleaned symb
4884:
4885: =item *
4886:
4887: is_on_map($uri) : checks if the $uri is somewhere on the current
4888: course map, user must be in a course for it to work.
4889:
4890: =item *
4891:
4892: numval($salt) : return random seed value (addend for rndseed)
4893:
4894: =item *
4895:
4896: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4897: a random seed, all arguments are optional, if they aren't sent it uses the
4898: environment to derive them. Note: if symb isn't sent and it can't get one
4899: from &symbread it will use the current time as its return value
4900:
4901: =item *
4902:
4903: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4904: unfakeable, receipt
4905:
4906: =item *
4907:
4908: receipt() : API to ireceipt working off of ENV values; given out to users
4909:
4910: =item *
4911:
4912: countacc($url) : count the number of accesses to a given URL
4913:
4914: =item *
4915:
4916: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4917:
4918: =item *
4919:
4920: checkin($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 $tcrsid)
4921:
4922: =item *
4923:
4924: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4925:
4926: =item *
4927:
4928: devalidate($symb) : devalidate temporary spreadsheet calculations,
4929: forcing spreadsheet to reevaluate the resource scores next time.
4930:
4931: =back
4932:
4933: =head2 Storing/Retreiving Data
4934:
4935: =over 4
4936:
4937: =item *
4938:
4939: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4940: for this url; hashref needs to be given and should be a \%hashname; the
4941: remaining args aren't required and if they aren't passed or are '' they will
4942: be derived from the ENV
4943:
4944: =item *
4945:
4946: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4947: uses critical subroutine
4948:
4949: =item *
4950:
4951: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4952: all args are optional
4953:
4954: =item *
4955:
4956: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4957: works very similar to store/cstore, but all data is stored in a
4958: temporary location and can be reset using tmpreset, $storehash should
4959: be a hash reference, returns nothing on success
4960:
4961: =item *
4962:
4963: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4964: similar to restore, but all data is stored in a temporary location and
4965: can be reset using tmpreset. Returns a hash of values on success,
4966: error string otherwise.
4967:
4968: =item *
4969:
4970: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4971: deltes all keys for $symb form the temporary storage hash.
4972:
4973: =item *
4974:
4975: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4976: reference filled in from namesp ($udom and $uname are optional)
4977:
4978: =item *
4979:
4980: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4981: namesp ($udom and $uname are optional)
4982:
4983: =item *
4984:
4985: dump($namespace,$udom,$uname,$regexp) :
4986: dumps the complete (or key matching regexp) namespace into a hash
4987: ($udom, $uname and $regexp are optional)
4988:
4989: =item *
4990:
4991: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4992: ($udom and $uname are optional)
4993:
4994: =item *
4995:
4996: cput($namespace,$storehash,$udom,$uname) : critical put
4997: ($udom and $uname are optional)
4998:
4999: =item *
5000:
5001: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5002: reference filled in from namesp (encrypts the return communication)
5003: ($udom and $uname are optional)
5004:
5005: =item *
5006:
5007: log($udom,$name,$home,$message) : write to permanent log for user; use
5008: critical subroutine
5009:
5010: =back
5011:
5012: =head2 Network Status Functions
5013:
5014: =over 4
5015:
5016: =item *
5017:
5018: dirlist($uri) : return directory list based on URI
5019:
5020: =item *
5021:
5022: spareserver() : find server with least workload from spare.tab
5023:
5024: =back
5025:
5026: =head2 Apache Request
5027:
5028: =over 4
5029:
5030: =item *
5031:
5032: ssi($url,%hash) : server side include, does a complete request cycle on url to
5033: localhost, posts hash
5034:
5035: =back
5036:
5037: =head2 Data to String to Data
5038:
5039: =over 4
5040:
5041: =item *
5042:
5043: hash2str(%hash) : convert a hash into a string complete with escaping and '='
5044: and '&' separators, supports elements that are arrayrefs and hashrefs
5045:
5046: =item *
5047:
5048: hashref2str($hashref) : convert a hashref into a string complete with
5049: escaping and '=' and '&' separators, supports elements that are
5050: arrayrefs and hashrefs
5051:
5052: =item *
5053:
5054: arrayref2str($arrayref) : convert an arrayref into a string complete
5055: with escaping and '&' separators, supports elements that are arrayrefs
5056: and hashrefs
5057:
5058: =item *
5059:
5060: str2hash($string) : convert string to hash using unescaping and
5061: splitting on '=' and '&', supports elements that are arrayrefs and
5062: hashrefs
5063:
5064: =item *
5065:
5066: str2array($string) : convert string to hash using unescaping and
5067: splitting on '&', supports elements that are arrayrefs and hashrefs
5068:
5069: =back
5070:
5071: =head2 Logging Routines
5072:
5073: =over 4
5074:
5075: These routines allow one to make log messages in the lonnet.log and
5076: lonnet.perm logfiles.
5077:
5078: =item *
5079:
5080: logtouch() : make sure the logfile, lonnet.log, exists
5081:
5082: =item *
5083:
5084: logthis() : append message to the normal lonnet.log file, it gets
5085: preiodically rolled over and deleted.
5086:
5087: =item *
5088:
5089: logperm() : append a permanent message to lonnet.perm.log, this log
5090: file never gets deleted by any automated portion of the system, only
5091: messages of critical importance should go in here.
5092:
5093: =back
5094:
5095: =head2 General File Helper Routines
5096:
5097: =over 4
5098:
5099: =item *
5100:
5101: getfile($file) : returns the entire contents of a file or -1; it
5102: properly subscribes to and replicates the file if neccessary.
5103:
5104: =item *
5105:
5106: filelocation($dir,$file) : returns file system location of a file
5107: based on URI; meant to be "fairly clean" absolute reference, $dir is a
5108: directory that relative $file lookups are to looked in ($dir of /a/dir
5109: and a file of ../bob will become /a/bob)
5110:
5111: =item *
5112:
5113: hreflocation($dir,$file) : returns file system location or a URL; same as
5114: filelocation except for hrefs
5115:
5116: =item *
5117:
5118: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
5119:
5120: =back
5121:
5122: =head2 HTTP Helper Routines
5123:
5124: =over 4
5125:
5126: =item *
5127:
5128: escape() : unpack non-word characters into CGI-compatible hex codes
5129:
5130: =item *
5131:
5132: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
5133:
5134: =back
5135:
5136: =head1 PRIVATE SUBROUTINES
5137:
5138: =head2 Underlying communication routines (Shouldn't call)
5139:
5140: =over 4
5141:
5142: =item *
5143:
5144: subreply() : tries to pass a message to lonc, returns con_lost if incapable
5145:
5146: =item *
5147:
5148: reply() : uses subreply to send a message to remote machine, logs all failures
5149:
5150: =item *
5151:
5152: critical() : passes a critical message to another server; if cannot
5153: get through then place message in connection buffer directory and
5154: returns con_delayed, if incapable of saving message, returns
5155: con_failed
5156:
5157: =item *
5158:
5159: reconlonc() : tries to reconnect lonc client processes.
5160:
5161: =back
5162:
5163: =head2 Resource Access Logging
5164:
5165: =over 4
5166:
5167: =item *
5168:
5169: flushcourselogs() : flush (save) buffer logs and access logs
5170:
5171: =item *
5172:
5173: courselog($what) : save message for course in hash
5174:
5175: =item *
5176:
5177: courseacclog($what) : save message for course using &courselog(). Perform
5178: special processing for specific resource types (problems, exams, quizzes, etc).
5179:
5180: =item *
5181:
5182: goodbye() : flush course logs and log shutting down; it is called in srm.conf
5183: as a PerlChildExitHandler
5184:
5185: =back
5186:
5187: =head2 Other
5188:
5189: =over 4
5190:
5191: =item *
5192:
5193: symblist($mapname,%newhash) : update symbolic storage links
5194:
5195: =back
5196:
5197: =cut
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