1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.424 2003/09/25 20:25:04 matthew 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: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2224: } else {
2225: my @pairs=split(/\&/,$rep);
2226: foreach (@pairs) {
2227: my ($key,$value)=split(/=/,$_);
2228: my ($symb,$param) = split(/:/,$key);
2229: $returnhash{&unescape($symb)}->{&unescape($param)} =
2230: &unescape($value);
2231: }
2232: }
2233: return %returnhash;
2234: }
2235:
2236: sub convert_dump_to_currentdump{
2237: my %hash = %{shift()};
2238: my %returnhash;
2239: # Code ripped from lond, essentially. The only difference
2240: # here is the unescaping done by lonnet::dump(). Conceivably
2241: # we might run in to problems with parameter names =~ /^v\./
2242: while (my ($key,$value) = each(%hash)) {
2243: my ($v,$symb,$param) = split(/:/,$key);
2244: next if ($v eq 'version' || $symb eq 'keys');
2245: next if (exists($returnhash{$symb}) &&
2246: exists($returnhash{$symb}->{$param}) &&
2247: $returnhash{$symb}->{'v.'.$param} > $v);
2248: $returnhash{$symb}->{$param}=$value;
2249: $returnhash{$symb}->{'v.'.$param}=$v;
2250: }
2251: #
2252: # Remove all of the keys in the hashes which keep track of
2253: # the version of the parameter.
2254: while (my ($symb,$param_hash) = each(%returnhash)) {
2255: # use a foreach because we are going to delete from the hash.
2256: foreach my $key (keys(%$param_hash)) {
2257: delete($param_hash->{$key}) if ($key =~ /^v\./);
2258: }
2259: }
2260: return \%returnhash;
2261: }
2262:
2263: # --------------------------------------------------------------- put interface
2264:
2265: sub put {
2266: my ($namespace,$storehash,$udomain,$uname)=@_;
2267: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2268: if (!$uname) { $uname=$ENV{'user.name'}; }
2269: my $uhome=&homeserver($uname,$udomain);
2270: my $items='';
2271: foreach (keys %$storehash) {
2272: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
2273: }
2274: $items=~s/\&$//;
2275: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2276: }
2277:
2278: # ------------------------------------------------------ critical put interface
2279:
2280: sub cput {
2281: my ($namespace,$storehash,$udomain,$uname)=@_;
2282: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2283: if (!$uname) { $uname=$ENV{'user.name'}; }
2284: my $uhome=&homeserver($uname,$udomain);
2285: my $items='';
2286: foreach (keys %$storehash) {
2287: $items.=escape($_).'='.escape($$storehash{$_}).'&';
2288: }
2289: $items=~s/\&$//;
2290: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2291: }
2292:
2293: # -------------------------------------------------------------- eget interface
2294:
2295: sub eget {
2296: my ($namespace,$storearr,$udomain,$uname)=@_;
2297: my $items='';
2298: foreach (@$storearr) {
2299: $items.=escape($_).'&';
2300: }
2301: $items=~s/\&$//;
2302: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2303: if (!$uname) { $uname=$ENV{'user.name'}; }
2304: my $uhome=&homeserver($uname,$udomain);
2305: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2306: my @pairs=split(/\&/,$rep);
2307: my %returnhash=();
2308: my $i=0;
2309: foreach (@$storearr) {
2310: $returnhash{$_}=unescape($pairs[$i]);
2311: $i++;
2312: }
2313: return %returnhash;
2314: }
2315:
2316: # ---------------------------------------------- Custom access rule evaluation
2317:
2318: sub customaccess {
2319: my ($priv,$uri)=@_;
2320: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2321: $urealm=~s/^\W//;
2322: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2323: my $access=0;
2324: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2325: my ($effect,$realm,$role)=split(/\:/,$_);
2326: if ($role) {
2327: if ($role ne $urole) { next; }
2328: }
2329: foreach (split(/\s*\,\s*/,$realm)) {
2330: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2331: if ($tdom) {
2332: if ($tdom ne $udom) { next; }
2333: }
2334: if ($tcrs) {
2335: if ($tcrs ne $ucrs) { next; }
2336: }
2337: if ($tsec) {
2338: if ($tsec ne $usec) { next; }
2339: }
2340: $access=($effect eq 'allow');
2341: last;
2342: }
2343: if ($realm eq '' && $role eq '') {
2344: $access=($effect eq 'allow');
2345: }
2346: }
2347: return $access;
2348: }
2349:
2350: # ------------------------------------------------- Check for a user privilege
2351:
2352: sub allowed {
2353: my ($priv,$uri)=@_;
2354:
2355: my $orguri=$uri;
2356: $uri=&declutter($uri);
2357:
2358: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2359: # Free bre access to adm and meta resources
2360:
2361: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2362: return 'F';
2363: }
2364:
2365: # Free bre to public access
2366:
2367: if ($priv eq 'bre') {
2368: my $copyright=&metadata($uri,'copyright');
2369: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2370: return 'F';
2371: }
2372: if ($copyright eq 'priv') {
2373: $uri=~/([^\/]+)\/([^\/]+)\//;
2374: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2375: return '';
2376: }
2377: }
2378: if ($copyright eq 'domain') {
2379: $uri=~/([^\/]+)\/([^\/]+)\//;
2380: unless (($ENV{'user.domain'} eq $1) ||
2381: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2382: return '';
2383: }
2384: }
2385: if ($ENV{'request.role'}=~ /li\.\//) {
2386: # Library role, so allow browsing of resources in this domain.
2387: return 'F';
2388: }
2389: if ($copyright eq 'custom') {
2390: unless (&customaccess($priv,$uri)) { return ''; }
2391: }
2392: }
2393: # Domain coordinator is trying to create a course
2394: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2395: # uri is the requested domain in this case.
2396: # comparison to 'request.role.domain' shows if the user has selected
2397: # a role of dc for the domain in question.
2398: return 'F' if ($uri eq $ENV{'request.role.domain'});
2399: }
2400:
2401: my $thisallowed='';
2402: my $statecond=0;
2403: my $courseprivid='';
2404:
2405: # Course
2406:
2407: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2408: $thisallowed.=$1;
2409: }
2410:
2411: # Domain
2412:
2413: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2414: =~/$priv\&([^\:]*)/) {
2415: $thisallowed.=$1;
2416: }
2417:
2418: # Course: uri itself is a course
2419: my $courseuri=$uri;
2420: $courseuri=~s/\_(\d)/\/$1/;
2421: $courseuri=~s/^([^\/])/\/$1/;
2422:
2423: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2424: =~/$priv\&([^\:]*)/) {
2425: $thisallowed.=$1;
2426: }
2427:
2428: # URI is an uploaded document for this course
2429:
2430: if (($priv eq 'bre') &&
2431: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2432: return 'F';
2433: }
2434: # Full access at system, domain or course-wide level? Exit.
2435:
2436: if ($thisallowed=~/F/) {
2437: return 'F';
2438: }
2439:
2440: # If this is generating or modifying users, exit with special codes
2441:
2442: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
2443: return $thisallowed;
2444: }
2445: #
2446: # Gathered so far: system, domain and course wide privileges
2447: #
2448: # Course: See if uri or referer is an individual resource that is part of
2449: # the course
2450:
2451: if ($ENV{'request.course.id'}) {
2452:
2453: $courseprivid=$ENV{'request.course.id'};
2454: if ($ENV{'request.course.sec'}) {
2455: $courseprivid.='/'.$ENV{'request.course.sec'};
2456: }
2457: $courseprivid=~s/\_/\//;
2458: my $checkreferer=1;
2459: my ($match,$cond)=&is_on_map($uri);
2460: if ($match) {
2461: $statecond=$cond;
2462: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2463: =~/$priv\&([^\:]*)/) {
2464: $thisallowed.=$1;
2465: $checkreferer=0;
2466: }
2467: }
2468:
2469: if ($checkreferer) {
2470: my $refuri=$ENV{'httpref.'.$orguri};
2471: unless ($refuri) {
2472: foreach (keys %ENV) {
2473: if ($_=~/^httpref\..*\*/) {
2474: my $pattern=$_;
2475: $pattern=~s/^httpref\.\/res\///;
2476: $pattern=~s/\*/\[\^\/\]\+/g;
2477: $pattern=~s/\//\\\//g;
2478: if ($orguri=~/$pattern/) {
2479: $refuri=$ENV{$_};
2480: }
2481: }
2482: }
2483: }
2484:
2485: if ($refuri) {
2486: $refuri=&declutter($refuri);
2487: my ($match,$cond)=&is_on_map($refuri);
2488: if ($match) {
2489: my $refstatecond=$cond;
2490: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2491: =~/$priv\&([^\:]*)/) {
2492: $thisallowed.=$1;
2493: $uri=$refuri;
2494: $statecond=$refstatecond;
2495: }
2496: }
2497: }
2498: }
2499: }
2500:
2501: #
2502: # Gathered now: all privileges that could apply, and condition number
2503: #
2504: #
2505: # Full or no access?
2506: #
2507:
2508: if ($thisallowed=~/F/) {
2509: return 'F';
2510: }
2511:
2512: unless ($thisallowed) {
2513: return '';
2514: }
2515:
2516: # Restrictions exist, deal with them
2517: #
2518: # C:according to course preferences
2519: # R:according to resource settings
2520: # L:unless locked
2521: # X:according to user session state
2522: #
2523:
2524: # Possibly locked functionality, check all courses
2525: # Locks might take effect only after 10 minutes cache expiration for other
2526: # courses, and 2 minutes for current course
2527:
2528: my $envkey;
2529: if ($thisallowed=~/L/) {
2530: foreach $envkey (keys %ENV) {
2531: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2532: my $courseid=$2;
2533: my $roleid=$1.'.'.$2;
2534: $courseid=~s/^\///;
2535: my $expiretime=600;
2536: if ($ENV{'request.role'} eq $roleid) {
2537: $expiretime=120;
2538: }
2539: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2540: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2541: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2542: &coursedescription($courseid);
2543: }
2544: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2545: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2546: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2547: &log($ENV{'user.domain'},$ENV{'user.name'},
2548: $ENV{'user.home'},
2549: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2550: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2551: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2552: return '';
2553: }
2554: }
2555: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2556: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2557: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2558: &log($ENV{'user.domain'},$ENV{'user.name'},
2559: $ENV{'user.home'},
2560: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2561: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2562: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2563: return '';
2564: }
2565: }
2566: }
2567: }
2568: }
2569:
2570: #
2571: # Rest of the restrictions depend on selected course
2572: #
2573:
2574: unless ($ENV{'request.course.id'}) {
2575: return '1';
2576: }
2577:
2578: #
2579: # Now user is definitely in a course
2580: #
2581:
2582:
2583: # Course preferences
2584:
2585: if ($thisallowed=~/C/) {
2586: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2587: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2588: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2589: =~/$rolecode/) {
2590: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2591: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2592: $ENV{'request.course.id'});
2593: return '';
2594: }
2595:
2596: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2597: =~/$unamedom/) {
2598: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2599: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2600: $ENV{'request.course.id'});
2601: return '';
2602: }
2603: }
2604:
2605: # Resource preferences
2606:
2607: if ($thisallowed=~/R/) {
2608: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2609: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2610: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2611: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2612: return '';
2613: }
2614: }
2615:
2616: # Restricted by state or randomout?
2617:
2618: if ($thisallowed=~/X/) {
2619: if ($ENV{'acc.randomout'}) {
2620: my $symb=&symbread($uri,1);
2621: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2622: return '';
2623: }
2624: }
2625: if (&condval($statecond)) {
2626: return '2';
2627: } else {
2628: return '';
2629: }
2630: }
2631:
2632: return 'F';
2633: }
2634:
2635: # --------------------------------------------------- Is a resource on the map?
2636:
2637: sub is_on_map {
2638: my $uri=&declutter(shift);
2639: my @uriparts=split(/\//,$uri);
2640: my $filename=$uriparts[$#uriparts];
2641: my $pathname=$uri;
2642: $pathname=~s|/\Q$filename\E$||;
2643: $pathname=~s/^adm\/wrapper\///;
2644: #Trying to find the conditional for the file
2645: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2646: /\&\Q$filename\E\:([\d\|]+)\&/);
2647: if ($match) {
2648: return (1,$1);
2649: } else {
2650: my ($name,$ext)=($filename=~/^(.+)\.(\w+)$/);
2651: $ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2652: /\&(\Q$name\E\.\d+\.$ext)\:([\d\|]+)\&/;
2653: return (0,$2,$pathname.'/'.$1);
2654: }
2655: }
2656:
2657: # ----------------------------------------------------------------- Define Role
2658:
2659: sub definerole {
2660: if (allowed('mcr','/')) {
2661: my ($rolename,$sysrole,$domrole,$courole)=@_;
2662: foreach (split(':',$sysrole)) {
2663: my ($crole,$cqual)=split(/\&/,$_);
2664: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2665: if ($pr{'cr:s'}=~/$crole\&/) {
2666: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2667: return "refused:s:$crole&$cqual";
2668: }
2669: }
2670: }
2671: foreach (split(':',$domrole)) {
2672: my ($crole,$cqual)=split(/\&/,$_);
2673: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2674: if ($pr{'cr:d'}=~/$crole\&/) {
2675: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2676: return "refused:d:$crole&$cqual";
2677: }
2678: }
2679: }
2680: foreach (split(':',$courole)) {
2681: my ($crole,$cqual)=split(/\&/,$_);
2682: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2683: if ($pr{'cr:c'}=~/$crole\&/) {
2684: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2685: return "refused:c:$crole&$cqual";
2686: }
2687: }
2688: }
2689: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2690: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2691: "rolesdef_$rolename=".
2692: escape($sysrole.'_'.$domrole.'_'.$courole);
2693: return reply($command,$ENV{'user.home'});
2694: } else {
2695: return 'refused';
2696: }
2697: }
2698:
2699: # ---------------- Make a metadata query against the network of library servers
2700:
2701: sub metadata_query {
2702: my ($query,$custom,$customshow,$server_array)=@_;
2703: my %rhash;
2704: my @server_list = (defined($server_array) ? @$server_array
2705: : keys(%libserv) );
2706: for my $server (@server_list) {
2707: unless ($custom or $customshow) {
2708: my $reply=&reply("querysend:".&escape($query),$server);
2709: $rhash{$server}=$reply;
2710: }
2711: else {
2712: my $reply=&reply("querysend:".&escape($query).':'.
2713: &escape($custom).':'.&escape($customshow),
2714: $server);
2715: $rhash{$server}=$reply;
2716: }
2717: }
2718: return \%rhash;
2719: }
2720:
2721: # ----------------------------------------- Send log queries and wait for reply
2722:
2723: sub log_query {
2724: my ($uname,$udom,$query,%filters)=@_;
2725: my $uhome=&homeserver($uname,$udom);
2726: if ($uhome eq 'no_host') { return 'error: no_host'; }
2727: my $uhost=$hostname{$uhome};
2728: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2729: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2730: $uhome);
2731: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2732: return get_query_reply($queryid);
2733: }
2734:
2735: sub get_query_reply {
2736: my $queryid=shift;
2737: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2738: my $reply='';
2739: for (1..100) {
2740: sleep 2;
2741: if (-e $replyfile.'.end') {
2742: if (my $fh=Apache::File->new($replyfile)) {
2743: $reply.=<$fh>;
2744: $fh->close;
2745: } else { return 'error: reply_file_error'; }
2746: return &unescape($reply);
2747: }
2748: }
2749: return 'timeout:'.$queryid;
2750: }
2751:
2752: sub courselog_query {
2753: #
2754: # possible filters:
2755: # url: url or symb
2756: # username
2757: # domain
2758: # action: view, submit, grade
2759: # start: timestamp
2760: # end: timestamp
2761: #
2762: my (%filters)=@_;
2763: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2764: if ($filters{'url'}) {
2765: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2766: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2767: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2768: }
2769: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2770: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2771: return &log_query($cname,$cdom,'courselog',%filters);
2772: }
2773:
2774: sub userlog_query {
2775: my ($uname,$udom,%filters)=@_;
2776: return &log_query($uname,$udom,'userlog',%filters);
2777: }
2778:
2779: # ------------------------------------------------------------------ Plain Text
2780:
2781: sub plaintext {
2782: my $short=shift;
2783: return &mt($prp{$short});
2784: }
2785:
2786: # ----------------------------------------------------------------- Assign Role
2787:
2788: sub assignrole {
2789: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
2790: my $mrole;
2791: if ($role =~ /^cr\//) {
2792: my $cwosec=$url;
2793: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2794: unless (&allowed('ccr',$cwosec)) {
2795: &logthis('Refused custom assignrole: '.
2796: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2797: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2798: return 'refused';
2799: }
2800: $mrole='cr';
2801: } else {
2802: my $cwosec=$url;
2803: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2804: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
2805: &logthis('Refused assignrole: '.
2806: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2807: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2808: return 'refused';
2809: }
2810: $mrole=$role;
2811: }
2812: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2813: "$udom:$uname:$url".'_'."$mrole=$role";
2814: if ($end) { $command.='_'.$end; }
2815: if ($start) {
2816: if ($end) {
2817: $command.='_'.$start;
2818: } else {
2819: $command.='_0_'.$start;
2820: }
2821: }
2822: # actually delete
2823: if ($deleteflag) {
2824: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
2825: # modify command to delete the role
2826: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
2827: "$udom:$uname:$url".'_'."$mrole";
2828: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
2829: # set start and finish to negative values for userrolelog
2830: $start=-1;
2831: $end=-1;
2832: }
2833: }
2834: # send command
2835: my $answer=&reply($command,&homeserver($uname,$udom));
2836: # log new user role if status is ok
2837: if ($answer eq 'ok') {
2838: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
2839: }
2840: return $answer;
2841: }
2842:
2843: # -------------------------------------------------- Modify user authentication
2844: # Overrides without validation
2845:
2846: sub modifyuserauth {
2847: my ($udom,$uname,$umode,$upass)=@_;
2848: my $uhome=&homeserver($uname,$udom);
2849: unless (&allowed('mau',$udom)) { return 'refused'; }
2850: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2851: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2852: ' in domain '.$ENV{'request.role.domain'});
2853: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2854: &escape($upass),$uhome);
2855: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2856: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2857: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2858: &log($udom,,$uname,$uhome,
2859: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2860: $ENV{'user.name'}.', '.$umode.
2861: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2862: unless ($reply eq 'ok') {
2863: &logthis('Authentication mode error: '.$reply);
2864: return 'error: '.$reply;
2865: }
2866: return 'ok';
2867: }
2868:
2869: # --------------------------------------------------------------- Modify a user
2870:
2871: sub modifyuser {
2872: my ($udom, $uname, $uid,
2873: $umode, $upass, $first,
2874: $middle, $last, $gene,
2875: $forceid, $desiredhome, $email)=@_;
2876: $udom=~s/\W//g;
2877: $uname=~s/\W//g;
2878: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2879: $umode.', '.$first.', '.$middle.', '.
2880: $last.', '.$gene.'(forceid: '.$forceid.')'.
2881: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2882: ' desiredhome not specified').
2883: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2884: ' in domain '.$ENV{'request.role.domain'});
2885: my $uhome=&homeserver($uname,$udom,'true');
2886: # ----------------------------------------------------------------- Create User
2887: if (($uhome eq 'no_host') &&
2888: (($umode && $upass) || ($umode eq 'localauth'))) {
2889: my $unhome='';
2890: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2891: $unhome = $desiredhome;
2892: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2893: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2894: } else { # load balancing routine for determining $unhome
2895: my $tryserver;
2896: my $loadm=10000000;
2897: foreach $tryserver (keys %libserv) {
2898: if ($hostdom{$tryserver} eq $udom) {
2899: my $answer=reply('load',$tryserver);
2900: if (($answer=~/\d+/) && ($answer<$loadm)) {
2901: $loadm=$answer;
2902: $unhome=$tryserver;
2903: }
2904: }
2905: }
2906: }
2907: if (($unhome eq '') || ($unhome eq 'no_host')) {
2908: return 'error: unable to find a home server for '.$uname.
2909: ' in domain '.$udom;
2910: }
2911: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2912: &escape($upass),$unhome);
2913: unless ($reply eq 'ok') {
2914: return 'error: '.$reply;
2915: }
2916: $uhome=&homeserver($uname,$udom,'true');
2917: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2918: return 'error: unable verify users home machine.';
2919: }
2920: } # End of creation of new user
2921: # ---------------------------------------------------------------------- Add ID
2922: if ($uid) {
2923: $uid=~tr/A-Z/a-z/;
2924: my %uidhash=&idrget($udom,$uname);
2925: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2926: && (!$forceid)) {
2927: unless ($uid eq $uidhash{$uname}) {
2928: return 'error: user id "'.$uid.'" does not match '.
2929: 'current user id "'.$uidhash{$uname}.'".';
2930: }
2931: } else {
2932: &idput($udom,($uname => $uid));
2933: }
2934: }
2935: # -------------------------------------------------------------- Add names, etc
2936: my @tmp=&get('environment',
2937: ['firstname','middlename','lastname','generation'],
2938: $udom,$uname);
2939: my %names;
2940: if ($tmp[0] =~ m/^error:.*/) {
2941: %names=();
2942: } else {
2943: %names = @tmp;
2944: }
2945: #
2946: # Make sure to not trash student environment if instructor does not bother
2947: # to supply name and email information
2948: #
2949: if ($first) { $names{'firstname'} = $first; }
2950: if (defined($middle)) { $names{'middlename'} = $middle; }
2951: if ($last) { $names{'lastname'} = $last; }
2952: if (defined($gene)) { $names{'generation'} = $gene; }
2953: if ($email) { $names{'notification'} = $email;
2954: $names{'critnotification'} = $email; }
2955:
2956: my $reply = &put('environment', \%names, $udom,$uname);
2957: if ($reply ne 'ok') { return 'error: '.$reply; }
2958: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2959: $umode.', '.$first.', '.$middle.', '.
2960: $last.', '.$gene.' by '.
2961: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2962: return 'ok';
2963: }
2964:
2965: # -------------------------------------------------------------- Modify student
2966:
2967: sub modifystudent {
2968: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2969: $end,$start,$forceid,$desiredhome,$email)=@_;
2970: my $cid='';
2971: unless ($cid=$ENV{'request.course.id'}) {
2972: return 'not_in_class';
2973: }
2974: # --------------------------------------------------------------- Make the user
2975: my $reply=&modifyuser
2976: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2977: $desiredhome,$email);
2978: unless ($reply eq 'ok') { return $reply; }
2979: # This will cause &modify_student_enrollment to get the uid from the
2980: # students environment
2981: $uid = undef if (!$forceid);
2982: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2983: $last,$gene,$usec,$end,$start);
2984: return $reply;
2985: }
2986:
2987: sub modify_student_enrollment {
2988: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2989: # Get the course id from the environment
2990: my $cid='';
2991: unless ($cid=$ENV{'request.course.id'}) {
2992: return 'not_in_class';
2993: }
2994: # Make sure the user exists
2995: my $uhome=&homeserver($uname,$udom);
2996: if (($uhome eq '') || ($uhome eq 'no_host')) {
2997: return 'error: no such user';
2998: }
2999: #
3000: # Get student data if we were not given enough information
3001: if (!defined($first) || $first eq '' ||
3002: !defined($last) || $last eq '' ||
3003: !defined($uid) || $uid eq '' ||
3004: !defined($middle) || $middle eq '' ||
3005: !defined($gene) || $gene eq '') {
3006: # They did not supply us with enough data to enroll the student, so
3007: # we need to pick up more information.
3008: my %tmp = &get('environment',
3009: ['firstname','middlename','lastname', 'generation','id']
3010: ,$udom,$uname);
3011:
3012: foreach (keys(%tmp)) {
3013: &logthis("key $_ = ".$tmp{$_});
3014: }
3015: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3016: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3017: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3018: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3019: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3020: }
3021: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
3022: $first,$middle);
3023: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
3024: $ENV{'course.'.$cid.'.num'}.':classlist:'.
3025: &escape($uname.':'.$udom).'='.
3026: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
3027: $ENV{'course.'.$cid.'.home'});
3028: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3029: return 'error: '.$reply;
3030: }
3031: # Add student role to user
3032: my $uurl='/'.$cid;
3033: $uurl=~s/\_/\//g;
3034: if ($usec) {
3035: $uurl.='/'.$usec;
3036: }
3037: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3038: }
3039:
3040: # ------------------------------------------------- Write to course preferences
3041:
3042: sub writecoursepref {
3043: my ($courseid,%prefs)=@_;
3044: $courseid=~s/^\///;
3045: $courseid=~s/\_/\//g;
3046: my ($cdomain,$cnum)=split(/\//,$courseid);
3047: my $chome=homeserver($cnum,$cdomain);
3048: if (($chome eq '') || ($chome eq 'no_host')) {
3049: return 'error: no such course';
3050: }
3051: my $cstring='';
3052: foreach (keys %prefs) {
3053: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3054: }
3055: $cstring=~s/\&$//;
3056: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3057: }
3058:
3059: # ---------------------------------------------------------- Make/modify course
3060:
3061: sub createcourse {
3062: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
3063: $url=&declutter($url);
3064: my $cid='';
3065: unless (&allowed('ccc',$udom)) {
3066: return 'refused';
3067: }
3068: # ------------------------------------------------------------------- Create ID
3069: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3070: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3071: # ----------------------------------------------- Make sure that does not exist
3072: my $uhome=&homeserver($uname,$udom,'true');
3073: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3074: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3075: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3076: $uhome=&homeserver($uname,$udom,'true');
3077: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3078: return 'error: unable to generate unique course-ID';
3079: }
3080: }
3081: # ------------------------------------------------ Check supplied server name
3082: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3083: if (! exists($libserv{$course_server})) {
3084: return 'error:bad server name '.$course_server;
3085: }
3086: # ------------------------------------------------------------- Make the course
3087: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3088: $course_server);
3089: unless ($reply eq 'ok') { return 'error: '.$reply; }
3090: $uhome=&homeserver($uname,$udom,'true');
3091: if (($uhome eq '') || ($uhome eq 'no_host')) {
3092: return 'error: no such course';
3093: }
3094: # ----------------------------------------------------------------- Course made
3095: # log existance
3096: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),
3097: $uhome);
3098: &flushcourselogs();
3099: # set toplevel url
3100: my $topurl=$url;
3101: unless ($nonstandard) {
3102: # ------------------------------------------ For standard courses, make top url
3103: my $mapurl=&clutter($url);
3104: if ($mapurl eq '/res/') { $mapurl=''; }
3105: $ENV{'form.initmap'}=(<<ENDINITMAP);
3106: <map>
3107: <resource id="1" type="start"></resource>
3108: <resource id="2" src="$mapurl"></resource>
3109: <resource id="3" type="finish"></resource>
3110: <link index="1" from="1" to="2"></link>
3111: <link index="2" from="2" to="3"></link>
3112: </map>
3113: ENDINITMAP
3114: $topurl=&declutter(
3115: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3116: );
3117: }
3118: # ----------------------------------------------------------- Write preferences
3119: &writecoursepref($udom.'_'.$uname,
3120: ('description' => $description,
3121: 'url' => $topurl));
3122: return '/'.$udom.'/'.$uname;
3123: }
3124:
3125: # ---------------------------------------------------------- Assign Custom Role
3126:
3127: sub assigncustomrole {
3128: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3129: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3130: $end,$start,$deleteflag);
3131: }
3132:
3133: # ----------------------------------------------------------------- Revoke Role
3134:
3135: sub revokerole {
3136: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3137: my $now=time;
3138: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3139: }
3140:
3141: # ---------------------------------------------------------- Revoke Custom Role
3142:
3143: sub revokecustomrole {
3144: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3145: my $now=time;
3146: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3147: $deleteflag);
3148: }
3149:
3150: # ------------------------------------------------------------ Directory lister
3151:
3152: sub dirlist {
3153: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3154:
3155: $uri=~s/^\///;
3156: $uri=~s/\/$//;
3157: my ($udom, $uname);
3158: (undef,$udom,$uname)=split(/\//,$uri);
3159: if(defined($userdomain)) {
3160: $udom = $userdomain;
3161: }
3162: if(defined($username)) {
3163: $uname = $username;
3164: }
3165:
3166: my $dirRoot = $perlvar{'lonDocRoot'};
3167: if(defined($alternateDirectoryRoot)) {
3168: $dirRoot = $alternateDirectoryRoot;
3169: $dirRoot =~ s/\/$//;
3170: }
3171:
3172: if($udom) {
3173: if($uname) {
3174: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3175: homeserver($uname,$udom));
3176: return split(/:/,$listing);
3177: } elsif(!defined($alternateDirectoryRoot)) {
3178: my $tryserver;
3179: my %allusers=();
3180: foreach $tryserver (keys %libserv) {
3181: if($hostdom{$tryserver} eq $udom) {
3182: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3183: $udom, $tryserver);
3184: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3185: && ($listing ne 'con_lost')) {
3186: foreach (split(/:/,$listing)) {
3187: my ($entry,@stat)=split(/&/,$_);
3188: $allusers{$entry}=1;
3189: }
3190: }
3191: }
3192: }
3193: my $alluserstr='';
3194: foreach (sort keys %allusers) {
3195: $alluserstr.=$_.'&user:';
3196: }
3197: $alluserstr=~s/:$//;
3198: return split(/:/,$alluserstr);
3199: } else {
3200: my @emptyResults = ();
3201: push(@emptyResults, 'missing user name');
3202: return split(':',@emptyResults);
3203: }
3204: } elsif(!defined($alternateDirectoryRoot)) {
3205: my $tryserver;
3206: my %alldom=();
3207: foreach $tryserver (keys %libserv) {
3208: $alldom{$hostdom{$tryserver}}=1;
3209: }
3210: my $alldomstr='';
3211: foreach (sort keys %alldom) {
3212: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3213: }
3214: $alldomstr=~s/:$//;
3215: return split(/:/,$alldomstr);
3216: } else {
3217: my @emptyResults = ();
3218: push(@emptyResults, 'missing domain');
3219: return split(':',@emptyResults);
3220: }
3221: }
3222:
3223: # --------------------------------------------- GetFileTimestamp
3224: # This function utilizes dirlist and returns the date stamp for
3225: # when it was last modified. It will also return an error of -1
3226: # if an error occurs
3227:
3228: ##
3229: ## FIXME: This subroutine assumes its caller knows something about the
3230: ## directory structure of the home server for the student ($root).
3231: ## Not a good assumption to make. Since this is for looking up files
3232: ## in user directories, the full path should be constructed by lond, not
3233: ## whatever machine we request data from.
3234: ##
3235: sub GetFileTimestamp {
3236: my ($studentDomain,$studentName,$filename,$root)=@_;
3237: $studentDomain=~s/\W//g;
3238: $studentName=~s/\W//g;
3239: my $subdir=$studentName.'__';
3240: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3241: my $proname="$studentDomain/$subdir/$studentName";
3242: $proname .= '/'.$filename;
3243: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3244: $studentName, $root);
3245: my @stats = split('&', $fileStat);
3246: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
3247: # @stats contains first the filename, then the stat output
3248: return $stats[10]; # so this is 10 instead of 9.
3249: } else {
3250: return -1;
3251: }
3252: }
3253:
3254: # -------------------------------------------------------- Value of a Condition
3255:
3256: sub directcondval {
3257: my $number=shift;
3258: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3259: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3260: } else {
3261: return 2;
3262: }
3263: }
3264:
3265: sub condval {
3266: my $condidx=shift;
3267: my $result=0;
3268: my $allpathcond='';
3269: foreach (split(/\|/,$condidx)) {
3270: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3271: $allpathcond.=
3272: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3273: }
3274: }
3275: $allpathcond=~s/\|$//;
3276: if ($ENV{'request.course.id'}) {
3277: if ($allpathcond) {
3278: my $operand='|';
3279: my @stack;
3280: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3281: if ($_ eq '(') {
3282: push @stack,($operand,$result)
3283: } elsif ($_ eq ')') {
3284: my $before=pop @stack;
3285: if (pop @stack eq '&') {
3286: $result=$result>$before?$before:$result;
3287: } else {
3288: $result=$result>$before?$result:$before;
3289: }
3290: } elsif (($_ eq '&') || ($_ eq '|')) {
3291: $operand=$_;
3292: } else {
3293: my $new=directcondval($_);
3294: if ($operand eq '&') {
3295: $result=$result>$new?$new:$result;
3296: } else {
3297: $result=$result>$new?$result:$new;
3298: }
3299: }
3300: }
3301: }
3302: }
3303: return $result;
3304: }
3305:
3306: # ---------------------------------------------------- Devalidate courseresdata
3307:
3308: sub devalidatecourseresdata {
3309: my ($coursenum,$coursedomain)=@_;
3310: my $hashid=$coursenum.':'.$coursedomain;
3311: &devalidate_cache(\%courseresdatacache,$hashid);
3312: }
3313:
3314: # --------------------------------------------------- Course Resourcedata Query
3315:
3316: sub courseresdata {
3317: my ($coursenum,$coursedomain,@which)=@_;
3318: my $coursehom=&homeserver($coursenum,$coursedomain);
3319: my $hashid=$coursenum.':'.$coursedomain;
3320: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid);
3321: unless (defined($cached)) {
3322: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3323: $result=\%dumpreply;
3324: my ($tmp) = keys(%dumpreply);
3325: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3326: &do_cache(\%courseresdatacache,$hashid,$result);
3327: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3328: return $tmp;
3329: } elsif ($tmp =~ /^(error)/) {
3330: $result=undef;
3331: &do_cache(\%courseresdatacache,$hashid,$result);
3332: }
3333: }
3334: foreach my $item (@which) {
3335: if (defined($result->{$item})) {
3336: return $result->{$item};
3337: }
3338: }
3339: return undef;
3340: }
3341:
3342: #
3343: # EXT resource caching routines
3344: #
3345:
3346: sub clear_EXT_cache_status {
3347: &delenv('cache.EXT.');
3348: }
3349:
3350: sub EXT_cache_status {
3351: my ($target_domain,$target_user) = @_;
3352: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3353: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
3354: # We know already the user has no data
3355: return 1;
3356: } else {
3357: return 0;
3358: }
3359: }
3360:
3361: sub EXT_cache_set {
3362: my ($target_domain,$target_user) = @_;
3363: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3364: &appenv($cachename => time);
3365: }
3366:
3367: # --------------------------------------------------------- Value of a Variable
3368: sub EXT {
3369: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
3370:
3371: unless ($varname) { return ''; }
3372: #get real user name/domain, courseid and symb
3373: my $courseid;
3374: my $publicuser;
3375: if (!($uname && $udom)) {
3376: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
3377: &Apache::lonxml::whichuser($symbparm);
3378: if (!$symbparm) { $symbparm=$cursymb; }
3379: } else {
3380: $courseid=$ENV{'request.course.id'};
3381: }
3382: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3383: my $rest;
3384: if (defined($therest[0])) {
3385: $rest=join('.',@therest);
3386: } else {
3387: $rest='';
3388: }
3389:
3390: my $qualifierrest=$qualifier;
3391: if ($rest) { $qualifierrest.='.'.$rest; }
3392: my $spacequalifierrest=$space;
3393: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
3394: if ($realm eq 'user') {
3395: # --------------------------------------------------------------- user.resource
3396: if ($space eq 'resource') {
3397: if (defined($Apache::lonhomework::parsing_a_problem)) {
3398: return $Apache::lonhomework::history{$qualifierrest};
3399: } else {
3400: my %restored;
3401: if ($publicuser || $ENV{'request.state'} eq 'construct') {
3402: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
3403: } else {
3404: %restored=&restore($symbparm,$courseid,$udom,$uname);
3405: }
3406: return $restored{$qualifierrest};
3407: }
3408: # ----------------------------------------------------------------- user.access
3409: } elsif ($space eq 'access') {
3410: # FIXME - not supporting calls for a specific user
3411: return &allowed($qualifier,$rest);
3412: # ------------------------------------------ user.preferences, user.environment
3413: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
3414: if (($uname eq $ENV{'user.name'}) &&
3415: ($udom eq $ENV{'user.domain'})) {
3416: return $ENV{join('.',('environment',$qualifierrest))};
3417: } else {
3418: my %returnhash;
3419: if (!$publicuser) {
3420: %returnhash=&userenvironment($udom,$uname,
3421: $qualifierrest);
3422: }
3423: return $returnhash{$qualifierrest};
3424: }
3425: # ----------------------------------------------------------------- user.course
3426: } elsif ($space eq 'course') {
3427: # FIXME - not supporting calls for a specific user
3428: return $ENV{join('.',('request.course',$qualifier))};
3429: # ------------------------------------------------------------------- user.role
3430: } elsif ($space eq 'role') {
3431: # FIXME - not supporting calls for a specific user
3432: my ($role,$where)=split(/\./,$ENV{'request.role'});
3433: if ($qualifier eq 'value') {
3434: return $role;
3435: } elsif ($qualifier eq 'extent') {
3436: return $where;
3437: }
3438: # ----------------------------------------------------------------- user.domain
3439: } elsif ($space eq 'domain') {
3440: return $udom;
3441: # ------------------------------------------------------------------- user.name
3442: } elsif ($space eq 'name') {
3443: return $uname;
3444: # ---------------------------------------------------- Any other user namespace
3445: } else {
3446: my %reply;
3447: if (!$publicuser) {
3448: %reply=&get($space,[$qualifierrest],$udom,$uname);
3449: }
3450: return $reply{$qualifierrest};
3451: }
3452: } elsif ($realm eq 'query') {
3453: # ---------------------------------------------- pull stuff out of query string
3454: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
3455: [$spacequalifierrest]);
3456: return $ENV{'form.'.$spacequalifierrest};
3457: } elsif ($realm eq 'request') {
3458: # ------------------------------------------------------------- request.browser
3459: if ($space eq 'browser') {
3460: return $ENV{'browser.'.$qualifier};
3461: # ------------------------------------------------------------ request.filename
3462: } else {
3463: return $ENV{'request.'.$spacequalifierrest};
3464: }
3465: } elsif ($realm eq 'course') {
3466: # ---------------------------------------------------------- course.description
3467: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3468: } elsif ($realm eq 'resource') {
3469:
3470: my $section;
3471: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
3472:
3473: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3474:
3475: # ----------------------------------------------------- Cascading lookup scheme
3476: if (!$symbparm) { $symbparm=&symbread(); }
3477: my $symbp=$symbparm;
3478: my $mapp=(&decode_symb($symbp))[0];
3479:
3480: my $symbparm=$symbp.'.'.$spacequalifierrest;
3481: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3482:
3483: if (($ENV{'user.name'} eq $uname) &&
3484: ($ENV{'user.domain'} eq $udom)) {
3485: $section=$ENV{'request.course.sec'};
3486: } else {
3487: if (! defined($usection)) {
3488: $section=&usection($udom,$uname,$courseid);
3489: } else {
3490: $section = $usection;
3491: }
3492: }
3493:
3494: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3495: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3496: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3497:
3498: my $courselevel=$courseid.'.'.$spacequalifierrest;
3499: my $courselevelr=$courseid.'.'.$symbparm;
3500: my $courselevelm=$courseid.'.'.$mapparm;
3501:
3502: # ----------------------------------------------------------- first, check user
3503: #most student don\'t have any data set, check if there is some data
3504: if (! &EXT_cache_status($udom,$uname)) {
3505: my $hashid="$udom:$uname";
3506: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid);
3507: if (!defined($cached)) {
3508: my %resourcedata=&get('resourcedata',
3509: [$courselevelr,$courselevelm,
3510: $courselevel],$udom,$uname);
3511: $result=\%resourcedata;
3512: }
3513: my ($tmp)=keys(%$result);
3514: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3515: &do_cache(\%userresdatacache,$hashid,$result);
3516: if ($$result{$courselevelr}) {
3517: return $$result{$courselevelr}; }
3518: if ($$result{$courselevelm}) {
3519: return $$result{$courselevelm}; }
3520: if ($$result{$courselevel}) {
3521: return $$result{$courselevel}; }
3522: } else {
3523: if ($tmp!~/No such file/) {
3524: &logthis("<font color=blue>WARNING:".
3525: " Trying to get resource data for ".
3526: $uname." at ".$udom.": ".
3527: $tmp."</font>");
3528: &do_cache(\%userresdatacache,$hashid,undef);
3529: } elsif ($tmp=~/error:No such file/) {
3530: &EXT_cache_set($udom,$uname);
3531: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3532: &do_cache(\%userresdatacache,$hashid,undef);
3533: return $tmp;
3534: }
3535: }
3536: }
3537:
3538: # -------------------------------------------------------- second, check course
3539:
3540: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3541: $ENV{'course.'.$courseid.'.domain'},
3542: ($seclevelr,$seclevelm,$seclevel,
3543: $courselevelr,$courselevelm,
3544: $courselevel));
3545: if (defined($coursereply)) { return $coursereply; }
3546:
3547: # ------------------------------------------------------ third, check map parms
3548: my %parmhash=();
3549: my $thisparm='';
3550: if (tie(%parmhash,'GDBM_File',
3551: $ENV{'request.course.fn'}.'_parms.db',
3552: &GDBM_READER(),0640)) {
3553: $thisparm=$parmhash{$symbparm};
3554: untie(%parmhash);
3555: }
3556: if ($thisparm) { return $thisparm; }
3557: }
3558: # --------------------------------------------- last, look in resource metadata
3559:
3560: $spacequalifierrest=~s/\./\_/;
3561: my $filename;
3562: if (!$symbparm) { $symbparm=&symbread(); }
3563: if ($symbparm) {
3564: $filename=(&decode_symb($symbparm))[2];
3565: } else {
3566: $filename=$ENV{'request.filename'};
3567: }
3568: my $metadata=&metadata($filename,$spacequalifierrest);
3569: if (defined($metadata)) { return $metadata; }
3570: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3571: if (defined($metadata)) { return $metadata; }
3572:
3573: # ------------------------------------------------------------------ Cascade up
3574: unless ($space eq '0') {
3575: my @parts=split(/_/,$space);
3576: my $id=pop(@parts);
3577: my $part=join('_',@parts);
3578: if ($part eq '') { $part='0'; }
3579: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3580: $symbparm,$udom,$uname,$section,1);
3581: if (defined($partgeneral)) { return $partgeneral; }
3582: }
3583: if ($recurse) { return undef; }
3584: my $pack_def=&packages_tab_default($filename,$varname);
3585: if (defined($pack_def)) { return $pack_def; }
3586:
3587: # ---------------------------------------------------- Any other user namespace
3588: } elsif ($realm eq 'environment') {
3589: # ----------------------------------------------------------------- environment
3590: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3591: return $ENV{'environment.'.$spacequalifierrest};
3592: } else {
3593: my %returnhash=&userenvironment($udom,$uname,
3594: $spacequalifierrest);
3595: return $returnhash{$spacequalifierrest};
3596: }
3597: } elsif ($realm eq 'system') {
3598: # ----------------------------------------------------------------- system.time
3599: if ($space eq 'time') {
3600: return time;
3601: }
3602: }
3603: return '';
3604: }
3605:
3606: sub packages_tab_default {
3607: my ($uri,$varname)=@_;
3608: my (undef,$part,$name)=split(/\./,$varname);
3609: my $packages=&metadata($uri,'packages');
3610: foreach my $package (split(/,/,$packages)) {
3611: my ($pack_type,$pack_part)=split(/_/,$package,2);
3612: if ($pack_part eq $part) {
3613: return $packagetab{"$pack_type&$name&default"};
3614: }
3615: }
3616: return undef;
3617: }
3618:
3619: sub add_prefix_and_part {
3620: my ($prefix,$part)=@_;
3621: my $keyroot;
3622: if (defined($prefix) && $prefix !~ /^__/) {
3623: # prefix that has a part already
3624: $keyroot=$prefix;
3625: } elsif (defined($prefix)) {
3626: # prefix that is missing a part
3627: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3628: } else {
3629: # no prefix at all
3630: if (defined($part)) { $keyroot='_'.$part; }
3631: }
3632: return $keyroot;
3633: }
3634:
3635: # ---------------------------------------------------------------- Get metadata
3636:
3637: sub metadata {
3638: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3639: $uri=&declutter($uri);
3640: # if it is a non metadata possible uri return quickly
3641: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3642: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
3643: ($uri =~ m|home/[^/]+/public_html/|)) {
3644: return '';
3645: }
3646: my $filename=$uri;
3647: $uri=~s/\.meta$//;
3648: #
3649: # Is the metadata already cached?
3650: # Look at timestamp of caching
3651: # Everything is cached by the main uri, libraries are never directly cached
3652: #
3653: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3654: #
3655: # Is this a recursive call for a library?
3656: #
3657: if ($liburi) {
3658: $liburi=&declutter($liburi);
3659: $filename=$liburi;
3660: } else {
3661: delete($metacache{$uri.':packages'});
3662: }
3663: my %metathesekeys=();
3664: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3665: my $metastring=&getfile(&filelocation('',&clutter($filename)));
3666: my $parser=HTML::LCParser->new(\$metastring);
3667: my $token;
3668: undef %metathesekeys;
3669: while ($token=$parser->get_token) {
3670: if ($token->[0] eq 'S') {
3671: if (defined($token->[2]->{'package'})) {
3672: #
3673: # This is a package - get package info
3674: #
3675: my $package=$token->[2]->{'package'};
3676: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3677: if (defined($token->[2]->{'id'})) {
3678: $keyroot.='_'.$token->[2]->{'id'};
3679: }
3680: if ($metacache{$uri.':packages'}) {
3681: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3682: } else {
3683: $metacache{$uri.':packages'}=$package.$keyroot;
3684: }
3685: foreach (keys %packagetab) {
3686: if ($_=~/^$package\&/) {
3687: my ($pack,$name,$subp)=split(/\&/,$_);
3688: # ignore package.tab specified default values
3689: # here &package_tab_default() will fetch those
3690: if ($subp eq 'default') { next; }
3691: my $value=$packagetab{$_};
3692: my $part=$keyroot;
3693: $part=~s/^\_//;
3694: if ($subp eq 'display') {
3695: $value.=' [Part: '.$part.']';
3696: }
3697: my $unikey='parameter'.$keyroot.'_'.$name;
3698: $metacache{$uri.':'.$unikey.'.part'}=$part;
3699: $metathesekeys{$unikey}=1;
3700: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3701: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3702: }
3703: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3704: $metacache{$uri.':'.$unikey}=
3705: $metacache{$uri.':'.$unikey.'.default'};
3706: }
3707: }
3708: }
3709: } else {
3710: #
3711: # This is not a package - some other kind of start tag
3712: #
3713: my $entry=$token->[1];
3714: my $unikey;
3715: if ($entry eq 'import') {
3716: $unikey='';
3717: } else {
3718: $unikey=$entry;
3719: }
3720: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3721:
3722: if (defined($token->[2]->{'id'})) {
3723: $unikey.='_'.$token->[2]->{'id'};
3724: }
3725:
3726: if ($entry eq 'import') {
3727: #
3728: # Importing a library here
3729: #
3730: if ($depthcount<20) {
3731: my $location=$parser->get_text('/import');
3732: my $dir=$filename;
3733: $dir=~s|[^/]*$||;
3734: $location=&filelocation($dir,$location);
3735: foreach (sort(split(/\,/,&metadata($uri,'keys',
3736: $location,$unikey,
3737: $depthcount+1)))) {
3738: $metathesekeys{$_}=1;
3739: }
3740: }
3741: } else {
3742:
3743: if (defined($token->[2]->{'name'})) {
3744: $unikey.='_'.$token->[2]->{'name'};
3745: }
3746: $metathesekeys{$unikey}=1;
3747: foreach (@{$token->[3]}) {
3748: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3749: }
3750: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3751: my $default=$metacache{$uri.':'.$unikey.'.default'};
3752: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3753: # only ws inside the tag, and not in default, so use default
3754: # as value
3755: $metacache{$uri.':'.$unikey}=$default;
3756: } else {
3757: # either something interesting inside the tag or default
3758: # uninteresting
3759: $metacache{$uri.':'.$unikey}=$internaltext;
3760: }
3761: # end of not-a-package not-a-library import
3762: }
3763: # end of not-a-package start tag
3764: }
3765: # the next is the end of "start tag"
3766: }
3767: }
3768: # are there custom rights to evaluate
3769: if ($metacache{$uri.':copyright'} eq 'custom') {
3770:
3771: #
3772: # Importing a rights file here
3773: #
3774: unless ($depthcount) {
3775: my $location=$metacache{$uri.':customdistributionfile'};
3776: my $dir=$filename;
3777: $dir=~s|[^/]*$||;
3778: $location=&filelocation($dir,$location);
3779: foreach (sort(split(/\,/,&metadata($uri,'keys',
3780: $location,'_rights',
3781: $depthcount+1)))) {
3782: $metathesekeys{$_}=1;
3783: }
3784: }
3785: }
3786: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3787: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3788: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3789: $metacache{$uri.':cachedtimestamp'}=time;
3790: # this is the end of "was not already recently cached
3791: }
3792: return $metacache{$uri.':'.$what};
3793: }
3794:
3795: sub metadata_generate_part0 {
3796: my ($metadata,$metacache,$uri) = @_;
3797: my %allnames;
3798: foreach my $metakey (sort keys %$metadata) {
3799: if ($metakey=~/^parameter\_(.*)/) {
3800: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3801: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3802: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
3803: $allnames{$name}=$part;
3804: }
3805: }
3806: }
3807: foreach my $name (keys(%allnames)) {
3808: $$metadata{"parameter_0_$name"}=1;
3809: my $key="$uri:parameter_0_$name";
3810: $$metacache{"$key.part"}='0';
3811: $$metacache{"$key.name"}=$name;
3812: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3813: $allnames{$name}.'_'.$name.
3814: '.type'};
3815: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3816: '.display'};
3817: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3818: $olddis=~s/$expr/\[Part: 0\]/;
3819: $$metacache{"$key.display"}=$olddis;
3820: }
3821: }
3822:
3823: # ------------------------------------------------- Get the title of a resource
3824:
3825: sub gettitle {
3826: my $urlsymb=shift;
3827: my $symb=&symbread($urlsymb);
3828: unless ($symb) {
3829: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3830: return &metadata($urlsymb,'title');
3831: }
3832: my ($result,$cached)=&is_cached(\%titlecache,$symb,600);
3833: if (defined($cached)) { return $result; }
3834: my ($map,$resid,$url)=&decode_symb($symb);
3835: my $title='';
3836: my %bighash;
3837: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3838: &GDBM_READER(),0640)) {
3839: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3840: $title=$bighash{'title_'.$mapid.'.'.$resid};
3841: untie %bighash;
3842: }
3843: $title=~s/\&colon\;/\:/gs;
3844: if ($title) {
3845: return &do_cache(\%titlecache,$symb,$title);
3846: } else {
3847: return &metadata($urlsymb,'title');
3848: }
3849: }
3850:
3851: # ------------------------------------------------- Update symbolic store links
3852:
3853: sub symblist {
3854: my ($mapname,%newhash)=@_;
3855: $mapname=declutter($mapname);
3856: my %hash;
3857: if (($ENV{'request.course.fn'}) && (%newhash)) {
3858: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3859: &GDBM_WRCREAT(),0640)) {
3860: foreach (keys %newhash) {
3861: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3862: }
3863: if (untie(%hash)) {
3864: return 'ok';
3865: }
3866: }
3867: }
3868: return 'error';
3869: }
3870:
3871: # --------------------------------------------------------------- Verify a symb
3872:
3873: sub symbverify {
3874: my ($symb,$thisfn)=@_;
3875: $thisfn=&declutter($thisfn);
3876: # direct jump to resource in page or to a sequence - will construct own symbs
3877: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3878: # check URL part
3879: my ($map,$resid,$url)=&decode_symb($symb);
3880: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3881:
3882: $symb=&symbclean($symb);
3883:
3884: my %bighash;
3885: my $okay=0;
3886: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3887: &GDBM_READER(),0640)) {
3888: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3889: unless ($ids) {
3890: $ids=$bighash{'ids_/'.$thisfn};
3891: }
3892: if ($ids) {
3893: # ------------------------------------------------------------------- Has ID(s)
3894: foreach (split(/\,/,$ids)) {
3895: my ($mapid,$resid)=split(/\./,$_);
3896: if (
3897: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3898: eq $symb) {
3899: $okay=1;
3900: }
3901: }
3902: }
3903: untie(%bighash);
3904: }
3905: return $okay;
3906: }
3907:
3908: # --------------------------------------------------------------- Clean-up symb
3909:
3910: sub symbclean {
3911: my $symb=shift;
3912:
3913: # remove version from map
3914: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3915:
3916: # remove version from URL
3917: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3918:
3919: return $symb;
3920: }
3921:
3922: # ---------------------------------------------- Split symb to find map and url
3923:
3924: sub decode_symb {
3925: my ($map,$resid,$url)=split(/\_\_\_/,shift);
3926: return (&fixversion($map),$resid,&fixversion($url));
3927: }
3928:
3929: sub fixversion {
3930: my $fn=shift;
3931: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
3932: my ($match,$cond,$versioned)=&is_on_map($fn);
3933: unless ($match) {
3934: $fn=$versioned;
3935: }
3936: return $fn;
3937: }
3938:
3939: # ------------------------------------------------------ Return symb list entry
3940:
3941: sub symbread {
3942: my ($thisfn,$donotrecurse)=@_;
3943: # no filename provided? try from environment
3944: unless ($thisfn) {
3945: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3946: $thisfn=$ENV{'request.filename'};
3947: }
3948: # is that filename actually a symb? Verify, clean, and return
3949: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3950: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3951: }
3952: $thisfn=declutter($thisfn);
3953: my %hash;
3954: my %bighash;
3955: my $syval='';
3956: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3957: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3958: &GDBM_READER(),0640)) {
3959: $syval=$hash{$thisfn};
3960: untie(%hash);
3961: }
3962: # ---------------------------------------------------------- There was an entry
3963: if ($syval) {
3964: unless ($syval=~/\_\d+$/) {
3965: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3966: &appenv('request.ambiguous' => $thisfn);
3967: return '';
3968: }
3969: $syval.=$1;
3970: }
3971: } else {
3972: # ------------------------------------------------------- Was not in symb table
3973: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3974: &GDBM_READER(),0640)) {
3975: # ---------------------------------------------- Get ID(s) for current resource
3976: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3977: unless ($ids) {
3978: $ids=$bighash{'ids_/'.$thisfn};
3979: }
3980: unless ($ids) {
3981: # alias?
3982: $ids=$bighash{'mapalias_'.$thisfn};
3983: }
3984: if ($ids) {
3985: # ------------------------------------------------------------------- Has ID(s)
3986: my @possibilities=split(/\,/,$ids);
3987: if ($#possibilities==0) {
3988: # ----------------------------------------------- There is only one possibility
3989: my ($mapid,$resid)=split(/\./,$ids);
3990: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3991: } elsif (!$donotrecurse) {
3992: # ------------------------------------------ There is more than one possibility
3993: my $realpossible=0;
3994: foreach (@possibilities) {
3995: my $file=$bighash{'src_'.$_};
3996: if (&allowed('bre',$file)) {
3997: my ($mapid,$resid)=split(/\./,$_);
3998: if ($bighash{'map_type_'.$mapid} ne 'page') {
3999: $realpossible++;
4000: $syval=declutter($bighash{'map_id_'.$mapid}).
4001: '___'.$resid;
4002: }
4003: }
4004: }
4005: if ($realpossible!=1) { $syval=''; }
4006: } else {
4007: $syval='';
4008: }
4009: }
4010: untie(%bighash)
4011: }
4012: }
4013: if ($syval) {
4014: return &symbclean($syval.'___'.$thisfn);
4015: }
4016: }
4017: &appenv('request.ambiguous' => $thisfn);
4018: return '';
4019: }
4020:
4021: # ---------------------------------------------------------- Return random seed
4022:
4023: sub numval {
4024: my $txt=shift;
4025: $txt=~tr/A-J/0-9/;
4026: $txt=~tr/a-j/0-9/;
4027: $txt=~tr/K-T/0-9/;
4028: $txt=~tr/k-t/0-9/;
4029: $txt=~tr/U-Z/0-5/;
4030: $txt=~tr/u-z/0-5/;
4031: $txt=~s/\D//g;
4032: return int($txt);
4033: }
4034:
4035: sub latest_rnd_algorithm_id {
4036: return '64bit';
4037: }
4038:
4039: sub rndseed {
4040: my ($symb,$courseid,$domain,$username)=@_;
4041:
4042: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
4043: if (!$symb) {
4044: unless ($symb=$wsymb) { return time; }
4045: }
4046: if (!$courseid) { $courseid=$wcourseid; }
4047: if (!$domain) { $domain=$wdomain; }
4048: if (!$username) { $username=$wusername }
4049: my $which=$ENV{"course.$courseid.rndseed"};
4050: my $CODE=$ENV{'scantron.CODE'};
4051: if (defined($CODE)) {
4052: &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
4053: } elsif ($which eq '64bit') {
4054: return &rndseed_64bit($symb,$courseid,$domain,$username);
4055: }
4056: return &rndseed_32bit($symb,$courseid,$domain,$username);
4057: }
4058:
4059: sub rndseed_32bit {
4060: my ($symb,$courseid,$domain,$username)=@_;
4061: {
4062: use integer;
4063: my $symbchck=unpack("%32C*",$symb) << 27;
4064: my $symbseed=numval($symb) << 22;
4065: my $namechck=unpack("%32C*",$username) << 17;
4066: my $nameseed=numval($username) << 12;
4067: my $domainseed=unpack("%32C*",$domain) << 7;
4068: my $courseseed=unpack("%32C*",$courseid);
4069: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4070: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4071: #&Apache::lonxml::debug("rndseed :$num:$symb");
4072: return $num;
4073: }
4074: }
4075:
4076: sub rndseed_64bit {
4077: my ($symb,$courseid,$domain,$username)=@_;
4078: {
4079: use integer;
4080: my $symbchck=unpack("%32S*",$symb) << 21;
4081: my $symbseed=numval($symb) << 10;
4082: my $namechck=unpack("%32S*",$username);
4083:
4084: my $nameseed=numval($username) << 21;
4085: my $domainseed=unpack("%32S*",$domain) << 10;
4086: my $courseseed=unpack("%32S*",$courseid);
4087:
4088: my $num1=$symbchck+$symbseed+$namechck;
4089: my $num2=$nameseed+$domainseed+$courseseed;
4090: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4091: #&Apache::lonxml::debug("rndseed :$num:$symb");
4092: return "$num1,$num2";
4093: }
4094: }
4095:
4096: sub rndseed_CODE_64bit {
4097: my ($symb,$courseid,$domain,$username)=@_;
4098: {
4099: use integer;
4100: my $symbchck=unpack("%32S*",$symb) << 16;
4101: my $symbseed=numval($symb);
4102: my $CODEseed=numval($ENV{'scantron.CODE'}) << 16;
4103: my $courseseed=unpack("%32S*",$courseid);
4104: my $num1=$symbseed+$CODEseed;
4105: my $num2=$courseseed+$symbchck;
4106: #&Apache::lonxml::debug("$symbseed:$CODEseed|$courseseed:$symbchck");
4107: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
4108: return "$num1,$num2";
4109: }
4110: }
4111:
4112: sub setup_random_from_rndseed {
4113: my ($rndseed)=@_;
4114: if ($rndseed =~/,/) {
4115: my ($num1,$num2)=split(/,/,$rndseed);
4116: &Math::Random::random_set_seed(abs($num1),abs($num2));
4117: } else {
4118: &Math::Random::random_set_seed_from_phrase($rndseed);
4119: }
4120: }
4121:
4122: sub ireceipt {
4123: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
4124: my $cuname=unpack("%32C*",$funame);
4125: my $cudom=unpack("%32C*",$fudom);
4126: my $cucourseid=unpack("%32C*",$fucourseid);
4127: my $cusymb=unpack("%32C*",$fusymb);
4128: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
4129: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
4130: ($cunique%$cuname+
4131: $cunique%$cudom+
4132: $cusymb%$cuname+
4133: $cusymb%$cudom+
4134: $cucourseid%$cuname+
4135: $cucourseid%$cudom);
4136: }
4137:
4138: sub receipt {
4139: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
4140: return &ireceipt($name,$domain,$courseid,$symb);
4141: }
4142:
4143: # ------------------------------------------------------------ Serves up a file
4144: # returns either the contents of the file or a -1
4145: sub getfile {
4146: my $file=shift;
4147: if ($file=~/^\/*uploaded\//) { # user file
4148: my $ua=new LWP::UserAgent;
4149: my $request=new HTTP::Request('GET',&tokenwrapper($file));
4150: my $response=$ua->request($request);
4151: if ($response->is_success()) {
4152: return $response->content;
4153: } else {
4154: return -1;
4155: }
4156: } else { # normal file from res space
4157: &repcopy($file);
4158: if (! -e $file ) { return -1; };
4159: my $fh=Apache::File->new($file);
4160: my $a='';
4161: while (<$fh>) { $a .=$_; }
4162: return $a;
4163: }
4164: }
4165:
4166: sub filelocation {
4167: my ($dir,$file) = @_;
4168: my $location;
4169: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
4170: if ($file=~m:^/~:) { # is a contruction space reference
4171: $location = $file;
4172: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
4173: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
4174: $location=$file;
4175: } else {
4176: $file=~s/^$perlvar{'lonDocRoot'}//;
4177: $file=~s:^/*res::;
4178: if ( !( $file =~ m:^/:) ) {
4179: $location = $dir. '/'.$file;
4180: } else {
4181: $location = '/home/httpd/html/res'.$file;
4182: }
4183: }
4184: $location=~s://+:/:g; # remove duplicate /
4185: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
4186: return $location;
4187: }
4188:
4189: sub hreflocation {
4190: my ($dir,$file)=@_;
4191: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
4192: my $finalpath=filelocation($dir,$file);
4193: $finalpath=~s/^\/home\/httpd\/html//;
4194: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
4195: return $finalpath;
4196: } else {
4197: return $file;
4198: }
4199: }
4200:
4201: # ------------------------------------------------------------- Declutters URLs
4202:
4203: sub declutter {
4204: my $thisfn=shift;
4205: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
4206: $thisfn=~s/^\///;
4207: $thisfn=~s/^res\///;
4208: $thisfn=~s/\?.+$//;
4209: return $thisfn;
4210: }
4211:
4212: # ------------------------------------------------------------- Clutter up URLs
4213:
4214: sub clutter {
4215: my $thisfn='/'.&declutter(shift);
4216: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
4217: $thisfn='/res'.$thisfn;
4218: }
4219: return $thisfn;
4220: }
4221:
4222: # -------------------------------------------------------- Escape Special Chars
4223:
4224: sub escape {
4225: my $str=shift;
4226: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4227: return $str;
4228: }
4229:
4230: # ----------------------------------------------------- Un-Escape Special Chars
4231:
4232: sub unescape {
4233: my $str=shift;
4234: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4235: return $str;
4236: }
4237:
4238: sub mod_perl_version {
4239: if (defined($perlvar{'MODPERL2'})) {
4240: return 2;
4241: }
4242: return 1;
4243: }
4244: # ================================================================ Main Program
4245:
4246: sub goodbye {
4247: &logthis("Starting Shut down");
4248: &flushcourselogs();
4249: &logthis("Shutting down");
4250: return DONE;
4251: }
4252:
4253: BEGIN {
4254: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
4255: unless ($readit) {
4256: {
4257: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
4258:
4259: while (my $configline=<$config>) {
4260: if ($configline =~ /^[^\#]*PerlSetVar/) {
4261: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4262: chomp($varvalue);
4263: $perlvar{$varname}=$varvalue;
4264: }
4265: }
4266: }
4267: {
4268: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
4269:
4270: while (my $configline=<$config>) {
4271: if ($configline =~ /^[^\#]*PerlSetVar/) {
4272: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4273: chomp($varvalue);
4274: $perlvar{$varname}=$varvalue;
4275: }
4276: }
4277: }
4278:
4279: # ------------------------------------------------------------ Read domain file
4280: {
4281: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
4282: '/domain.tab');
4283: %domaindescription = ();
4284: %domain_auth_def = ();
4285: %domain_auth_arg_def = ();
4286: if ($fh) {
4287: while (<$fh>) {
4288: next if (/^(\#|\s*$)/);
4289: # next if /^\#/;
4290: chomp;
4291: my ($domain, $domain_description, $def_auth, $def_auth_arg,
4292: $def_lang, $city, $longi, $lati) = split(/:/,$_);
4293: $domain_auth_def{$domain}=$def_auth;
4294: $domain_auth_arg_def{$domain}=$def_auth_arg;
4295: $domaindescription{$domain}=$domain_description;
4296: $domain_lang_def{$domain}=$def_lang;
4297: $domain_city{$domain}=$city;
4298: $domain_longi{$domain}=$longi;
4299: $domain_lati{$domain}=$lati;
4300:
4301: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
4302: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
4303: }
4304: }
4305: }
4306:
4307:
4308: # ------------------------------------------------------------- Read hosts file
4309: {
4310: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
4311:
4312: while (my $configline=<$config>) {
4313: next if ($configline =~ /^(\#|\s*$)/);
4314: chomp($configline);
4315: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
4316: if ($id && $domain && $role && $name && $ip) {
4317: $hostname{$id}=$name;
4318: $hostdom{$id}=$domain;
4319: $hostip{$id}=$ip;
4320: $iphost{$ip}=$id;
4321: if ($role eq 'library') { $libserv{$id}=$name; }
4322: } else {
4323: if ($configline) {
4324: &logthis("Skipping hosts.tab line -$configline-");
4325: }
4326: }
4327: }
4328: }
4329:
4330: # ------------------------------------------------------ Read spare server file
4331: {
4332: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
4333:
4334: while (my $configline=<$config>) {
4335: chomp($configline);
4336: if ($configline) {
4337: $spareid{$configline}=1;
4338: }
4339: }
4340: }
4341: # ------------------------------------------------------------ Read permissions
4342: {
4343: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
4344:
4345: while (my $configline=<$config>) {
4346: chomp($configline);
4347: if ($configline) {
4348: my ($role,$perm)=split(/ /,$configline);
4349: if ($perm ne '') { $pr{$role}=$perm; }
4350: }
4351: }
4352: }
4353:
4354: # -------------------------------------------- Read plain texts for permissions
4355: {
4356: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
4357:
4358: while (my $configline=<$config>) {
4359: chomp($configline);
4360: if ($configline) {
4361: my ($short,$plain)=split(/:/,$configline);
4362: if ($plain ne '') { $prp{$short}=$plain; }
4363: }
4364: }
4365: }
4366:
4367: # ---------------------------------------------------------- Read package table
4368: {
4369: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
4370:
4371: while (my $configline=<$config>) {
4372: chomp($configline);
4373: my ($short,$plain)=split(/:/,$configline);
4374: my ($pack,$name)=split(/\&/,$short);
4375: if ($plain ne '') {
4376: $packagetab{$pack.'&'.$name.'&name'}=$name;
4377: $packagetab{$short}=$plain;
4378: }
4379: }
4380: }
4381:
4382: # ------------- set up temporary directory
4383: {
4384: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
4385:
4386: }
4387:
4388: %metacache=();
4389:
4390: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
4391: $dumpcount=0;
4392:
4393: &logtouch();
4394: &logthis('<font color=yellow>INFO: Read configuration</font>');
4395: $readit=1;
4396: }
4397: }
4398:
4399: 1;
4400: __END__
4401:
4402: =pod
4403:
4404: =head1 NAME
4405:
4406: Apache::lonnet - Subroutines to ask questions about things in the network.
4407:
4408: =head1 SYNOPSIS
4409:
4410: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
4411:
4412: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
4413:
4414: Common parameters:
4415:
4416: =over 4
4417:
4418: =item *
4419:
4420: $uname : an internal username (if $cname expecting a course Id specifically)
4421:
4422: =item *
4423:
4424: $udom : a domain (if $cdom expecting a course's domain specifically)
4425:
4426: =item *
4427:
4428: $symb : a resource instance identifier
4429:
4430: =item *
4431:
4432: $namespace : the name of a .db file that contains the data needed or
4433: being set.
4434:
4435: =back
4436:
4437: =head1 OVERVIEW
4438:
4439: lonnet provides subroutines which interact with the
4440: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
4441: about classes, users, and resources.
4442:
4443: For many of these objects you can also use this to store data about
4444: them or modify them in various ways.
4445:
4446: =head2 Symbs
4447:
4448: To identify a specific instance of a resource, LON-CAPA uses symbols
4449: or "symbs"X<symb>. These identifiers are built from the URL of the
4450: map, the resource number of the resource in the map, and the URL of
4451: the resource itself. The latter is somewhat redundant, but might help
4452: if maps change.
4453:
4454: An example is
4455:
4456: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
4457:
4458: The respective map entry is
4459:
4460: <resource id="19" src="/res/msu/korte/tests/part12.problem"
4461: title="Problem 2">
4462: </resource>
4463:
4464: Symbs are used by the random number generator, as well as to store and
4465: restore data specific to a certain instance of for example a problem.
4466:
4467: =head2 Storing And Retrieving Data
4468:
4469: X<store()>X<cstore()>X<restore()>Three of the most important functions
4470: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
4471: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
4472: is is the non-critical message twin of cstore. These functions are for
4473: handlers to store a perl hash to a user's permanent data space in an
4474: easy manner, and to retrieve it again on another call. It is expected
4475: that a handler would use this once at the beginning to retrieve data,
4476: and then again once at the end to send only the new data back.
4477:
4478: The data is stored in the user's data directory on the user's
4479: homeserver under the ID of the course.
4480:
4481: The hash that is returned by restore will have all of the previous
4482: value for all of the elements of the hash.
4483:
4484: Example:
4485:
4486: #creating a hash
4487: my %hash;
4488: $hash{'foo'}='bar';
4489:
4490: #storing it
4491: &Apache::lonnet::cstore(\%hash);
4492:
4493: #changing a value
4494: $hash{'foo'}='notbar';
4495:
4496: #adding a new value
4497: $hash{'bar'}='foo';
4498: &Apache::lonnet::cstore(\%hash);
4499:
4500: #retrieving the hash
4501: my %history=&Apache::lonnet::restore();
4502:
4503: #print the hash
4504: foreach my $key (sort(keys(%history))) {
4505: print("\%history{$key} = $history{$key}");
4506: }
4507:
4508: Will print out:
4509:
4510: %history{1:foo} = bar
4511: %history{1:keys} = foo:timestamp
4512: %history{1:timestamp} = 990455579
4513: %history{2:bar} = foo
4514: %history{2:foo} = notbar
4515: %history{2:keys} = foo:bar:timestamp
4516: %history{2:timestamp} = 990455580
4517: %history{bar} = foo
4518: %history{foo} = notbar
4519: %history{timestamp} = 990455580
4520: %history{version} = 2
4521:
4522: Note that the special hash entries C<keys>, C<version> and
4523: C<timestamp> were added to the hash. C<version> will be equal to the
4524: total number of versions of the data that have been stored. The
4525: C<timestamp> attribute will be the UNIX time the hash was
4526: stored. C<keys> is available in every historical section to list which
4527: keys were added or changed at a specific historical revision of a
4528: hash.
4529:
4530: B<Warning>: do not store the hash that restore returns directly. This
4531: will cause a mess since it will restore the historical keys as if the
4532: were new keys. I.E. 1:foo will become 1:1:foo etc.
4533:
4534: Calling convention:
4535:
4536: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
4537: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
4538:
4539: For more detailed information, see lonnet specific documentation.
4540:
4541: =head1 RETURN MESSAGES
4542:
4543: =over 4
4544:
4545: =item * B<con_lost>: unable to contact remote host
4546:
4547: =item * B<con_delayed>: unable to contact remote host, message will be delivered
4548: when the connection is brought back up
4549:
4550: =item * B<con_failed>: unable to contact remote host and unable to save message
4551: for later delivery
4552:
4553: =item * B<error:>: an error a occured, a description of the error follows the :
4554:
4555: =item * B<no_such_host>: unable to fund a host associated with the user/domain
4556: that was requested
4557:
4558: =back
4559:
4560: =head1 PUBLIC SUBROUTINES
4561:
4562: =head2 Session Environment Functions
4563:
4564: =over 4
4565:
4566: =item *
4567: X<appenv()>
4568: B<appenv(%hash)>: the value of %hash is written to
4569: the user envirnoment file, and will be restored for each access this
4570: user makes during this session, also modifies the %ENV for the current
4571: process
4572:
4573: =item *
4574: X<delenv()>
4575: B<delenv($regexp)>: removes all items from the session
4576: environment file that matches the regular expression in $regexp. The
4577: values are also delted from the current processes %ENV.
4578:
4579: =back
4580:
4581: =head2 User Information
4582:
4583: =over 4
4584:
4585: =item *
4586: X<queryauthenticate()>
4587: B<queryauthenticate($uname,$udom)>: try to determine user's current
4588: authentication scheme
4589:
4590: =item *
4591: X<authenticate()>
4592: B<authenticate($uname,$upass,$udom)>: try to
4593: authenticate user from domain's lib servers (first use the current
4594: one). C<$upass> should be the users password.
4595:
4596: =item *
4597: X<homeserver()>
4598: B<homeserver($uname,$udom)>: find the server which has
4599: the user's directory and files (there must be only one), this caches
4600: the answer, and also caches if there is a borken connection.
4601:
4602: =item *
4603: X<idget()>
4604: B<idget($udom,@ids)>: find the usernames behind a list of IDs
4605: (IDs are a unique resource in a domain, there must be only 1 ID per
4606: username, and only 1 username per ID in a specific domain) (returns
4607: hash: id=>name,id=>name)
4608:
4609: =item *
4610: X<idrget()>
4611: B<idrget($udom,@unames)>: find the IDs behind a list of
4612: usernames (returns hash: name=>id,name=>id)
4613:
4614: =item *
4615: X<idput()>
4616: B<idput($udom,%ids)>: store away a list of names and associated IDs
4617:
4618: =item *
4619: X<rolesinit()>
4620: B<rolesinit($udom,$username,$authhost)>: get user privileges
4621:
4622: =item *
4623: X<usection()>
4624: B<usection($udom,$uname,$cname)>: finds the section of student in the
4625: course $cname, return section name/number or '' for "not in course"
4626: and '-1' for "no section"
4627:
4628: =item *
4629: X<userenvironment()>
4630: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
4631: passed in @what from the requested user's environment, returns a hash
4632:
4633: =back
4634:
4635: =head2 User Roles
4636:
4637: =over 4
4638:
4639: =item *
4640:
4641: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
4642: actions
4643: F: full access
4644: U,I,K: authentication modes (cxx only)
4645: '': forbidden
4646: 1: user needs to choose course
4647: 2: browse allowed
4648:
4649: =item *
4650:
4651: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4652: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4653: and course level
4654:
4655: =item *
4656:
4657: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4658: explanation of a user role term
4659:
4660: =back
4661:
4662: =head2 User Modification
4663:
4664: =over 4
4665:
4666: =item *
4667:
4668: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4669: user for the level given by URL. Optional start and end dates (leave empty
4670: string or zero for "no date")
4671:
4672: =item *
4673:
4674: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4675: change a users, password, possible return values are: ok,
4676: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4677: refused
4678:
4679: =item *
4680:
4681: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
4682:
4683: =item *
4684:
4685: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4686: modify user
4687:
4688: =item *
4689:
4690: modifystudent
4691:
4692: modify a students enrollment and identification information.
4693: The course id is resolved based on the current users environment.
4694: This means the envoking user must be a course coordinator or otherwise
4695: associated with a course.
4696:
4697: This call is essentially a wrapper for lonnet::modifyuser and
4698: lonnet::modify_student_enrollment
4699:
4700: Inputs:
4701:
4702: =over 4
4703:
4704: =item B<$udom> Students loncapa domain
4705:
4706: =item B<$uname> Students loncapa login name
4707:
4708: =item B<$uid> Students id/student number
4709:
4710: =item B<$umode> Students authentication mode
4711:
4712: =item B<$upass> Students password
4713:
4714: =item B<$first> Students first name
4715:
4716: =item B<$middle> Students middle name
4717:
4718: =item B<$last> Students last name
4719:
4720: =item B<$gene> Students generation
4721:
4722: =item B<$usec> Students section in course
4723:
4724: =item B<$end> Unix time of the roles expiration
4725:
4726: =item B<$start> Unix time of the roles start date
4727:
4728: =item B<$forceid> If defined, allow $uid to be changed
4729:
4730: =item B<$desiredhome> server to use as home server for student
4731:
4732: =back
4733:
4734: =item *
4735:
4736: modify_student_enrollment
4737:
4738: Change a students enrollment status in a class. The environment variable
4739: 'role.request.course' must be defined for this function to proceed.
4740:
4741: Inputs:
4742:
4743: =over 4
4744:
4745: =item $udom, students domain
4746:
4747: =item $uname, students name
4748:
4749: =item $uid, students user id
4750:
4751: =item $first, students first name
4752:
4753: =item $middle
4754:
4755: =item $last
4756:
4757: =item $gene
4758:
4759: =item $usec
4760:
4761: =item $end
4762:
4763: =item $start
4764:
4765: =back
4766:
4767:
4768: =item *
4769:
4770: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4771: custom role; give a custom role to a user for the level given by URL. Specify
4772: name and domain of role author, and role name
4773:
4774: =item *
4775:
4776: revokerole($udom,$uname,$url,$role) : revoke a role for url
4777:
4778: =item *
4779:
4780: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4781:
4782: =back
4783:
4784: =head2 Course Infomation
4785:
4786: =over 4
4787:
4788: =item *
4789:
4790: coursedescription($courseid) : course description
4791:
4792: =item *
4793:
4794: courseresdata($coursenum,$coursedomain,@which) : request for current
4795: parameter setting for a specific course, @what should be a list of
4796: parameters to ask about. This routine caches answers for 5 minutes.
4797:
4798: =back
4799:
4800: =head2 Course Modification
4801:
4802: =over 4
4803:
4804: =item *
4805:
4806: writecoursepref($courseid,%prefs) : write preferences (environment
4807: database) for a course
4808:
4809: =item *
4810:
4811: createcourse($udom,$description,$url) : make/modify course
4812:
4813: =back
4814:
4815: =head2 Resource Subroutines
4816:
4817: =over 4
4818:
4819: =item *
4820:
4821: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
4822:
4823: =item *
4824:
4825: repcopy($filename) : subscribes to the requested file, and attempts to
4826: replicate from the owning library server, Might return
4827: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4828: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4829: resource. Expects the local filesystem pathname
4830: (/home/httpd/html/res/....)
4831:
4832: =back
4833:
4834: =head2 Resource Information
4835:
4836: =over 4
4837:
4838: =item *
4839:
4840: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4841: a vairety of different possible values, $varname should be a request
4842: string, and the other parameters can be used to specify who and what
4843: one is asking about.
4844:
4845: Possible values for $varname are environment.lastname (or other item
4846: from the envirnment hash), user.name (or someother aspect about the
4847: user), resource.0.maxtries (or some other part and parameter of a
4848: resource)
4849:
4850: =item *
4851:
4852: directcondval($number) : get current value of a condition; reads from a state
4853: string
4854:
4855: =item *
4856:
4857: condval($condidx) : value of condition index based on state
4858:
4859: =item *
4860:
4861: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4862: resource's metadata, $what should be either a specific key, or either
4863: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4864: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4865:
4866: this function automatically caches all requests
4867:
4868: =item *
4869:
4870: metadata_query($query,$custom,$customshow) : make a metadata query against the
4871: network of library servers; returns file handle of where SQL and regex results
4872: will be stored for query
4873:
4874: =item *
4875:
4876: symbread($filename) : return symbolic list entry (filename argument optional);
4877: returns the data handle
4878:
4879: =item *
4880:
4881: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4882: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4883: failure, user must be in a course, as it assumes the existance of the
4884: course initi hash, and uses $ENV('request.course.id'}
4885:
4886:
4887: =item *
4888:
4889: symbclean($symb) : removes versions numbers from a symb, returns the
4890: cleaned symb
4891:
4892: =item *
4893:
4894: is_on_map($uri) : checks if the $uri is somewhere on the current
4895: course map, user must be in a course for it to work.
4896:
4897: =item *
4898:
4899: numval($salt) : return random seed value (addend for rndseed)
4900:
4901: =item *
4902:
4903: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4904: a random seed, all arguments are optional, if they aren't sent it uses the
4905: environment to derive them. Note: if symb isn't sent and it can't get one
4906: from &symbread it will use the current time as its return value
4907:
4908: =item *
4909:
4910: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4911: unfakeable, receipt
4912:
4913: =item *
4914:
4915: receipt() : API to ireceipt working off of ENV values; given out to users
4916:
4917: =item *
4918:
4919: countacc($url) : count the number of accesses to a given URL
4920:
4921: =item *
4922:
4923: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4924:
4925: =item *
4926:
4927: checkin($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 $tcrsid)
4928:
4929: =item *
4930:
4931: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4932:
4933: =item *
4934:
4935: devalidate($symb) : devalidate temporary spreadsheet calculations,
4936: forcing spreadsheet to reevaluate the resource scores next time.
4937:
4938: =back
4939:
4940: =head2 Storing/Retreiving Data
4941:
4942: =over 4
4943:
4944: =item *
4945:
4946: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4947: for this url; hashref needs to be given and should be a \%hashname; the
4948: remaining args aren't required and if they aren't passed or are '' they will
4949: be derived from the ENV
4950:
4951: =item *
4952:
4953: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4954: uses critical subroutine
4955:
4956: =item *
4957:
4958: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4959: all args are optional
4960:
4961: =item *
4962:
4963: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4964: works very similar to store/cstore, but all data is stored in a
4965: temporary location and can be reset using tmpreset, $storehash should
4966: be a hash reference, returns nothing on success
4967:
4968: =item *
4969:
4970: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4971: similar to restore, but all data is stored in a temporary location and
4972: can be reset using tmpreset. Returns a hash of values on success,
4973: error string otherwise.
4974:
4975: =item *
4976:
4977: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4978: deltes all keys for $symb form the temporary storage hash.
4979:
4980: =item *
4981:
4982: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4983: reference filled in from namesp ($udom and $uname are optional)
4984:
4985: =item *
4986:
4987: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4988: namesp ($udom and $uname are optional)
4989:
4990: =item *
4991:
4992: dump($namespace,$udom,$uname,$regexp) :
4993: dumps the complete (or key matching regexp) namespace into a hash
4994: ($udom, $uname and $regexp are optional)
4995:
4996: =item *
4997:
4998: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4999: ($udom and $uname are optional)
5000:
5001: =item *
5002:
5003: cput($namespace,$storehash,$udom,$uname) : critical put
5004: ($udom and $uname are optional)
5005:
5006: =item *
5007:
5008: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5009: reference filled in from namesp (encrypts the return communication)
5010: ($udom and $uname are optional)
5011:
5012: =item *
5013:
5014: log($udom,$name,$home,$message) : write to permanent log for user; use
5015: critical subroutine
5016:
5017: =back
5018:
5019: =head2 Network Status Functions
5020:
5021: =over 4
5022:
5023: =item *
5024:
5025: dirlist($uri) : return directory list based on URI
5026:
5027: =item *
5028:
5029: spareserver() : find server with least workload from spare.tab
5030:
5031: =back
5032:
5033: =head2 Apache Request
5034:
5035: =over 4
5036:
5037: =item *
5038:
5039: ssi($url,%hash) : server side include, does a complete request cycle on url to
5040: localhost, posts hash
5041:
5042: =back
5043:
5044: =head2 Data to String to Data
5045:
5046: =over 4
5047:
5048: =item *
5049:
5050: hash2str(%hash) : convert a hash into a string complete with escaping and '='
5051: and '&' separators, supports elements that are arrayrefs and hashrefs
5052:
5053: =item *
5054:
5055: hashref2str($hashref) : convert a hashref into a string complete with
5056: escaping and '=' and '&' separators, supports elements that are
5057: arrayrefs and hashrefs
5058:
5059: =item *
5060:
5061: arrayref2str($arrayref) : convert an arrayref into a string complete
5062: with escaping and '&' separators, supports elements that are arrayrefs
5063: and hashrefs
5064:
5065: =item *
5066:
5067: str2hash($string) : convert string to hash using unescaping and
5068: splitting on '=' and '&', supports elements that are arrayrefs and
5069: hashrefs
5070:
5071: =item *
5072:
5073: str2array($string) : convert string to hash using unescaping and
5074: splitting on '&', supports elements that are arrayrefs and hashrefs
5075:
5076: =back
5077:
5078: =head2 Logging Routines
5079:
5080: =over 4
5081:
5082: These routines allow one to make log messages in the lonnet.log and
5083: lonnet.perm logfiles.
5084:
5085: =item *
5086:
5087: logtouch() : make sure the logfile, lonnet.log, exists
5088:
5089: =item *
5090:
5091: logthis() : append message to the normal lonnet.log file, it gets
5092: preiodically rolled over and deleted.
5093:
5094: =item *
5095:
5096: logperm() : append a permanent message to lonnet.perm.log, this log
5097: file never gets deleted by any automated portion of the system, only
5098: messages of critical importance should go in here.
5099:
5100: =back
5101:
5102: =head2 General File Helper Routines
5103:
5104: =over 4
5105:
5106: =item *
5107:
5108: getfile($file) : returns the entire contents of a file or -1; it
5109: properly subscribes to and replicates the file if neccessary.
5110:
5111: =item *
5112:
5113: filelocation($dir,$file) : returns file system location of a file
5114: based on URI; meant to be "fairly clean" absolute reference, $dir is a
5115: directory that relative $file lookups are to looked in ($dir of /a/dir
5116: and a file of ../bob will become /a/bob)
5117:
5118: =item *
5119:
5120: hreflocation($dir,$file) : returns file system location or a URL; same as
5121: filelocation except for hrefs
5122:
5123: =item *
5124:
5125: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
5126:
5127: =back
5128:
5129: =head2 HTTP Helper Routines
5130:
5131: =over 4
5132:
5133: =item *
5134:
5135: escape() : unpack non-word characters into CGI-compatible hex codes
5136:
5137: =item *
5138:
5139: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
5140:
5141: =back
5142:
5143: =head1 PRIVATE SUBROUTINES
5144:
5145: =head2 Underlying communication routines (Shouldn't call)
5146:
5147: =over 4
5148:
5149: =item *
5150:
5151: subreply() : tries to pass a message to lonc, returns con_lost if incapable
5152:
5153: =item *
5154:
5155: reply() : uses subreply to send a message to remote machine, logs all failures
5156:
5157: =item *
5158:
5159: critical() : passes a critical message to another server; if cannot
5160: get through then place message in connection buffer directory and
5161: returns con_delayed, if incapable of saving message, returns
5162: con_failed
5163:
5164: =item *
5165:
5166: reconlonc() : tries to reconnect lonc client processes.
5167:
5168: =back
5169:
5170: =head2 Resource Access Logging
5171:
5172: =over 4
5173:
5174: =item *
5175:
5176: flushcourselogs() : flush (save) buffer logs and access logs
5177:
5178: =item *
5179:
5180: courselog($what) : save message for course in hash
5181:
5182: =item *
5183:
5184: courseacclog($what) : save message for course using &courselog(). Perform
5185: special processing for specific resource types (problems, exams, quizzes, etc).
5186:
5187: =item *
5188:
5189: goodbye() : flush course logs and log shutting down; it is called in srm.conf
5190: as a PerlChildExitHandler
5191:
5192: =back
5193:
5194: =head2 Other
5195:
5196: =over 4
5197:
5198: =item *
5199:
5200: symblist($mapname,%newhash) : update symbolic storage links
5201:
5202: =back
5203:
5204: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonnet.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / lonnet / perl