File:
[LON-CAPA] /
loncom /
lonnet /
perl /
lonnet.pm
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1.306:
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Thu Dec 5 22:59:37 2002 UTC (21 years, 7 months ago) by
albertel
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MAIN
CVS tags:
HEAD
- Fixes BUG#794
- Created new status UNAVAILABLE
- EXT now passes con_lost and no_such_host messages back when fetching parameters
- Updated start_problem, start_part, and gradestatus to understand new UNAVAILABLE status
1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.306 2002/12/05 22:59:37 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 02/27/01 Scott Harrison
51: # 3/2 Gerd Kortemeyer
52: # 3/15,3/19 Scott Harrison
53: # 3/19,3/20 Gerd Kortemeyer
54: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
55: # 5/26,5/28 Gerd Kortemeyer
56: # 5/30 H. K. Ng
57: # 6/1 Gerd Kortemeyer
58: # July Guy Albertelli
59: # 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,
60: # 10/2 Gerd Kortemeyer
61: # 10/5,10/10,11/13,11/15 Scott Harrison
62: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
63: # 12/5 Matthew Hall
64: # 12/5 Guy Albertelli
65: # 12/6,12/7,12/12 Gerd Kortemeyer
66: # 12/18 Scott Harrison
67: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
68: # YEAR=2002
69: # 1/4,2/4,2/7 Gerd Kortemeyer
70: #
71: ###
72:
73: package Apache::lonnet;
74:
75: use strict;
76: use Apache::File;
77: use LWP::UserAgent();
78: use HTTP::Headers;
79: use vars
80: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
81: %libserv %pr %prp %metacache %packagetab %titlecache
82: %courselogs %accesshash $processmarker $dumpcount
83: %coursedombuf %coursehombuf %courseresdatacache %domaindescription);
84: use IO::Socket;
85: use GDBM_File;
86: use Apache::Constants qw(:common :http);
87: use HTML::LCParser;
88: use Fcntl qw(:flock);
89: use Apache::loncoursedata;
90:
91: my $readit;
92:
93: # --------------------------------------------------------------------- Logging
94:
95: sub logtouch {
96: my $execdir=$perlvar{'lonDaemons'};
97: unless (-e "$execdir/logs/lonnet.log") {
98: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
99: close $fh;
100: }
101: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
102: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
103: }
104:
105: sub logthis {
106: my $message=shift;
107: my $execdir=$perlvar{'lonDaemons'};
108: my $now=time;
109: my $local=localtime($now);
110: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
111: print $fh "$local ($$): $message\n";
112: return 1;
113: }
114:
115: sub logperm {
116: my $message=shift;
117: my $execdir=$perlvar{'lonDaemons'};
118: my $now=time;
119: my $local=localtime($now);
120: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
121: print $fh "$now:$message:$local\n";
122: return 1;
123: }
124:
125: # -------------------------------------------------- Non-critical communication
126: sub subreply {
127: my ($cmd,$server)=@_;
128: my $peerfile="$perlvar{'lonSockDir'}/$server";
129: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
130: Type => SOCK_STREAM,
131: Timeout => 10)
132: or return "con_lost";
133: print $client "$cmd\n";
134: my $answer=<$client>;
135: if (!$answer) { $answer="con_lost"; }
136: chomp($answer);
137: return $answer;
138: }
139:
140: sub reply {
141: my ($cmd,$server)=@_;
142: unless (defined($hostname{$server})) { return 'no_such_host'; }
143: my $answer=subreply($cmd,$server);
144: if ($answer eq 'con_lost') {
145: #sleep 5;
146: #$answer=subreply($cmd,$server);
147: #if ($answer eq 'con_lost') {
148: # &logthis("Second attempt con_lost on $server");
149: # my $peerfile="$perlvar{'lonSockDir'}/$server";
150: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
151: # Type => SOCK_STREAM,
152: # Timeout => 10)
153: # or return "con_lost";
154: # &logthis("Killing socket");
155: # print $client "close_connection_exit\n";
156: #sleep 5;
157: # $answer=subreply($cmd,$server);
158: #}
159: }
160: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
161: &logthis("<font color=blue>WARNING:".
162: " $cmd to $server returned $answer</font>");
163: }
164: return $answer;
165: }
166:
167: # ----------------------------------------------------------- Send USR1 to lonc
168:
169: sub reconlonc {
170: my $peerfile=shift;
171: &logthis("Trying to reconnect for $peerfile");
172: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
173: if (my $fh=Apache::File->new("$loncfile")) {
174: my $loncpid=<$fh>;
175: chomp($loncpid);
176: if (kill 0 => $loncpid) {
177: &logthis("lonc at pid $loncpid responding, sending USR1");
178: kill USR1 => $loncpid;
179: sleep 1;
180: if (-e "$peerfile") { return; }
181: &logthis("$peerfile still not there, give it another try");
182: sleep 5;
183: if (-e "$peerfile") { return; }
184: &logthis(
185: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
186: } else {
187: &logthis(
188: "<font color=blue>WARNING:".
189: " lonc at pid $loncpid not responding, giving up</font>");
190: }
191: } else {
192: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
193: }
194: }
195:
196: # ------------------------------------------------------ Critical communication
197:
198: sub critical {
199: my ($cmd,$server)=@_;
200: unless ($hostname{$server}) {
201: &logthis("<font color=blue>WARNING:".
202: " Critical message to unknown server ($server)</font>");
203: return 'no_such_host';
204: }
205: sleep 2;
206: my $answer=reply($cmd,$server);
207: if ($answer eq 'con_lost') {
208: my $pingreply=reply('ping',$server);
209: &reconlonc("$perlvar{'lonSockDir'}/$server");
210: my $pongreply=reply('pong',$server);
211: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
212: $answer=reply($cmd,$server);
213: if ($answer eq 'con_lost') {
214: my $now=time;
215: my $middlename=$cmd;
216: $middlename=substr($middlename,0,16);
217: $middlename=~s/\W//g;
218: my $dfilename=
219: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
220: $dumpcount++;
221: {
222: my $dfh;
223: if ($dfh=Apache::File->new(">$dfilename")) {
224: print $dfh "$cmd\n";
225: }
226: }
227: sleep 2;
228: my $wcmd='';
229: {
230: my $dfh;
231: if ($dfh=Apache::File->new("$dfilename")) {
232: $wcmd=<$dfh>;
233: }
234: }
235: chomp($wcmd);
236: if ($wcmd eq $cmd) {
237: &logthis("<font color=blue>WARNING: ".
238: "Connection buffer $dfilename: $cmd</font>");
239: &logperm("D:$server:$cmd");
240: return 'con_delayed';
241: } else {
242: &logthis("<font color=red>CRITICAL:"
243: ." Critical connection failed: $server $cmd</font>");
244: &logperm("F:$server:$cmd");
245: return 'con_failed';
246: }
247: }
248: }
249: return $answer;
250: }
251:
252: # ---------------------------------------------------------- Append Environment
253:
254: sub appenv {
255: my %newenv=@_;
256: foreach (keys %newenv) {
257: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
258: &logthis("<font color=blue>WARNING: ".
259: "Attempt to modify environment ".$_." to ".$newenv{$_}
260: .'</font>');
261: delete($newenv{$_});
262: } else {
263: $ENV{$_}=$newenv{$_};
264: }
265: }
266:
267: my $lockfh;
268: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
269: return 'error: '.$!;
270: }
271: unless (flock($lockfh,LOCK_EX)) {
272: &logthis("<font color=blue>WARNING: ".
273: 'Could not obtain exclusive lock in appenv: '.$!);
274: $lockfh->close();
275: return 'error: '.$!;
276: }
277:
278: my @oldenv;
279: {
280: my $fh;
281: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
282: return 'error: '.$!;
283: }
284: @oldenv=<$fh>;
285: $fh->close();
286: }
287: for (my $i=0; $i<=$#oldenv; $i++) {
288: chomp($oldenv[$i]);
289: if ($oldenv[$i] ne '') {
290: my ($name,$value)=split(/=/,$oldenv[$i]);
291: unless (defined($newenv{$name})) {
292: $newenv{$name}=$value;
293: }
294: }
295: }
296: {
297: my $fh;
298: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
299: return 'error';
300: }
301: my $newname;
302: foreach $newname (keys %newenv) {
303: print $fh "$newname=$newenv{$newname}\n";
304: }
305: $fh->close();
306: }
307:
308: $lockfh->close();
309: return 'ok';
310: }
311: # ----------------------------------------------------- Delete from Environment
312:
313: sub delenv {
314: my $delthis=shift;
315: my %newenv=();
316: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
317: &logthis("<font color=blue>WARNING: ".
318: "Attempt to delete from environment ".$delthis);
319: return 'error';
320: }
321: my @oldenv;
322: {
323: my $fh;
324: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
325: return 'error';
326: }
327: unless (flock($fh,LOCK_SH)) {
328: &logthis("<font color=blue>WARNING: ".
329: 'Could not obtain shared lock in delenv: '.$!);
330: $fh->close();
331: return 'error: '.$!;
332: }
333: @oldenv=<$fh>;
334: $fh->close();
335: }
336: {
337: my $fh;
338: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
339: return 'error';
340: }
341: unless (flock($fh,LOCK_EX)) {
342: &logthis("<font color=blue>WARNING: ".
343: 'Could not obtain exclusive lock in delenv: '.$!);
344: $fh->close();
345: return 'error: '.$!;
346: }
347: foreach (@oldenv) {
348: unless ($_=~/^$delthis/) { print $fh $_; }
349: }
350: $fh->close();
351: }
352: return 'ok';
353: }
354:
355: # ------------------------------------------ Fight off request when overloaded
356:
357: sub overloaderror {
358: my ($r,$checkserver)=@_;
359: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
360: my $loadavg;
361: if ($checkserver eq $perlvar{'lonHostID'}) {
362: my $loadfile=Apache::File->new('/proc/loadavg');
363: $loadavg=<$loadfile>;
364: $loadavg =~ s/\s.*//g;
365: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
366: } else {
367: $loadavg=&reply('load',$checkserver);
368: }
369: my $overload=$loadavg-100;
370: if ($overload>0) {
371: $r->err_headers_out->{'Retry-After'}=$overload;
372: $r->log_error('Overload of '.$overload.' on '.$checkserver);
373: return 413;
374: }
375: return '';
376: }
377:
378: # ------------------------------ Find server with least workload from spare.tab
379:
380: sub spareserver {
381: my $loadpercent = shift;
382: my $tryserver;
383: my $spareserver='';
384: my $lowestserver=$loadpercent;
385: foreach $tryserver (keys %spareid) {
386: my $answer=reply('load',$tryserver);
387: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
388: $spareserver="http://$hostname{$tryserver}";
389: $lowestserver=$answer;
390: }
391: }
392: return $spareserver;
393: }
394:
395: # --------------------------------------------- Try to change a user's password
396:
397: sub changepass {
398: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
399: $currentpass = &escape($currentpass);
400: $newpass = &escape($newpass);
401: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
402: $server);
403: if (! $answer) {
404: &logthis("No reply on password change request to $server ".
405: "by $uname in domain $udom.");
406: } elsif ($answer =~ "^ok") {
407: &logthis("$uname in $udom successfully changed their password ".
408: "on $server.");
409: } elsif ($answer =~ "^pwchange_failure") {
410: &logthis("$uname in $udom was unable to change their password ".
411: "on $server. The action was blocked by either lcpasswd ".
412: "or pwchange");
413: } elsif ($answer =~ "^non_authorized") {
414: &logthis("$uname in $udom did not get their password correct when ".
415: "attempting to change it on $server.");
416: } elsif ($answer =~ "^auth_mode_error") {
417: &logthis("$uname in $udom attempted to change their password despite ".
418: "not being locally or internally authenticated on $server.");
419: } elsif ($answer =~ "^unknown_user") {
420: &logthis("$uname in $udom attempted to change their password ".
421: "on $server but were unable to because $server is not ".
422: "their home server.");
423: } elsif ($answer =~ "^refused") {
424: &logthis("$server refused to change $uname in $udom password because ".
425: "it was sent an unencrypted request to change the password.");
426: }
427: return $answer;
428: }
429:
430: # ----------------------- Try to determine user's current authentication scheme
431:
432: sub queryauthenticate {
433: my ($uname,$udom)=@_;
434: if (($perlvar{'lonRole'} eq 'library') &&
435: ($udom eq $perlvar{'lonDefDomain'})) {
436: my $answer=reply("encrypt:currentauth:$udom:$uname",
437: $perlvar{'lonHostID'});
438: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
439: if (length($answer)) {
440: return $answer;
441: }
442: else {
443: &logthis("User $uname at $udom lacks an authentication mechanism");
444: return 'no_host';
445: }
446: }
447: }
448:
449: my $tryserver;
450: foreach $tryserver (keys %libserv) {
451: if ($hostdom{$tryserver} eq $udom) {
452: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
453: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
454: if (length($answer)) {
455: return $answer;
456: }
457: else {
458: &logthis("User $uname at $udom lacks an authentication mechanism");
459: return 'no_host';
460: }
461: }
462: }
463: }
464: &logthis("User $uname at $udom lacks an authentication mechanism");
465: return 'no_host';
466: }
467:
468: # --------- Try to authenticate user from domain's lib servers (first this one)
469:
470: sub authenticate {
471: my ($uname,$upass,$udom)=@_;
472: $upass=escape($upass);
473: $uname=~s/\W//g;
474: if (($perlvar{'lonRole'} eq 'library') &&
475: ($udom eq $perlvar{'lonDefDomain'})) {
476: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
477: if ($answer =~ /authorized/) {
478: if ($answer eq 'authorized') {
479: &logthis("User $uname at $udom authorized by local server");
480: return $perlvar{'lonHostID'};
481: }
482: if ($answer eq 'non_authorized') {
483: &logthis("User $uname at $udom rejected by local server");
484: return 'no_host';
485: }
486: }
487: }
488:
489: my $tryserver;
490: foreach $tryserver (keys %libserv) {
491: if ($hostdom{$tryserver} eq $udom) {
492: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
493: if ($answer =~ /authorized/) {
494: if ($answer eq 'authorized') {
495: &logthis("User $uname at $udom authorized by $tryserver");
496: return $tryserver;
497: }
498: if ($answer eq 'non_authorized') {
499: &logthis("User $uname at $udom rejected by $tryserver");
500: return 'no_host';
501: }
502: }
503: }
504: }
505: &logthis("User $uname at $udom could not be authenticated");
506: return 'no_host';
507: }
508:
509: # ---------------------- Find the homebase for a user from domain's lib servers
510:
511: sub homeserver {
512: my ($uname,$udom,$ignoreBadCache)=@_;
513: my $index="$uname:$udom";
514: if ($homecache{$index}) {
515: return "$homecache{$index}";
516: }
517: my $tryserver;
518: foreach $tryserver (keys %libserv) {
519: next if ($ignoreBadCache ne 'true' &&
520: exists($badServerCache{$tryserver}));
521: if ($hostdom{$tryserver} eq $udom) {
522: my $answer=reply("home:$udom:$uname",$tryserver);
523: if ($answer eq 'found') {
524: $homecache{$index}=$tryserver;
525: return $tryserver;
526: } elsif ($answer eq 'no_host') {
527: $badServerCache{$tryserver}=1;
528: }
529: }
530: }
531: return 'no_host';
532: }
533:
534: # ------------------------------------- Find the usernames behind a list of IDs
535:
536: sub idget {
537: my ($udom,@ids)=@_;
538: my %returnhash=();
539:
540: my $tryserver;
541: foreach $tryserver (keys %libserv) {
542: if ($hostdom{$tryserver} eq $udom) {
543: my $idlist=join('&',@ids);
544: $idlist=~tr/A-Z/a-z/;
545: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
546: my @answer=();
547: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
548: @answer=split(/\&/,$reply);
549: } ;
550: my $i;
551: for ($i=0;$i<=$#ids;$i++) {
552: if ($answer[$i]) {
553: $returnhash{$ids[$i]}=$answer[$i];
554: }
555: }
556: }
557: }
558: return %returnhash;
559: }
560:
561: # ------------------------------------- Find the IDs behind a list of usernames
562:
563: sub idrget {
564: my ($udom,@unames)=@_;
565: my %returnhash=();
566: foreach (@unames) {
567: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
568: }
569: return %returnhash;
570: }
571:
572: # ------------------------------- Store away a list of names and associated IDs
573:
574: sub idput {
575: my ($udom,%ids)=@_;
576: my %servers=();
577: foreach (keys %ids) {
578: my $uhom=&homeserver($_,$udom);
579: if ($uhom ne 'no_host') {
580: my $id=&escape($ids{$_});
581: $id=~tr/A-Z/a-z/;
582: my $unam=&escape($_);
583: if ($servers{$uhom}) {
584: $servers{$uhom}.='&'.$id.'='.$unam;
585: } else {
586: $servers{$uhom}=$id.'='.$unam;
587: }
588: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
589: }
590: }
591: foreach (keys %servers) {
592: &critical('idput:'.$udom.':'.$servers{$_},$_);
593: }
594: }
595:
596: # ------------------------------------- Find the section of student in a course
597:
598: sub getsection {
599: my ($udom,$unam,$courseid)=@_;
600: $courseid=~s/\_/\//g;
601: $courseid=~s/^(\w)/\/$1/;
602: my %Pending;
603: my %Expired;
604: #
605: # Each role can either have not started yet (pending), be active,
606: # or have expired.
607: #
608: # If there is an active role, we are done.
609: #
610: # If there is more than one role which has not started yet,
611: # choose the one which will start sooner
612: # If there is one role which has not started yet, return it.
613: #
614: # If there is more than one expired role, choose the one which ended last.
615: # If there is a role which has expired, return it.
616: #
617: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
618: &homeserver($unam,$udom)))) {
619: my ($key,$value)=split(/\=/,$_);
620: $key=&unescape($key);
621: next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
622: my $section=$1;
623: if ($key eq $courseid.'_st') { $section=''; }
624: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
625: my $now=time;
626: if (defined($end) && ($now > $end)) {
627: $Expired{$end}=$section;
628: next;
629: }
630: if (defined($start) && ($now < $start)) {
631: $Pending{$start}=$section;
632: next;
633: }
634: return $section;
635: }
636: #
637: # Presumedly there will be few matching roles from the above
638: # loop and the sorting time will be negligible.
639: if (scalar(keys(%Pending))) {
640: my ($time) = sort {$a <=> $b} keys(%Pending);
641: return $Pending{$time};
642: }
643: if (scalar(keys(%Expired))) {
644: my @sorted = sort {$a <=> $b} keys(%Expired);
645: my $time = pop(@sorted);
646: return $Expired{$time};
647: }
648: return '-1';
649: }
650:
651: sub usection {
652: my ($udom,$unam,$courseid)=@_;
653: $courseid=~s/\_/\//g;
654: $courseid=~s/^(\w)/\/$1/;
655: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
656: &homeserver($unam,$udom)))) {
657: my ($key,$value)=split(/\=/,$_);
658: $key=&unescape($key);
659: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
660: my $section=$1;
661: if ($key eq $courseid.'_st') { $section=''; }
662: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
663: my $now=time;
664: my $notactive=0;
665: if ($start) {
666: if ($now<$start) { $notactive=1; }
667: }
668: if ($end) {
669: if ($now>$end) { $notactive=1; }
670: }
671: unless ($notactive) { return $section; }
672: }
673: }
674: return '-1';
675: }
676:
677: # ------------------------------------- Read an entry from a user's environment
678:
679: sub userenvironment {
680: my ($udom,$unam,@what)=@_;
681: my %returnhash=();
682: my @answer=split(/\&/,
683: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
684: &homeserver($unam,$udom)));
685: my $i;
686: for ($i=0;$i<=$#what;$i++) {
687: $returnhash{$what[$i]}=&unescape($answer[$i]);
688: }
689: return %returnhash;
690: }
691:
692: # -------------------------------------------------------------------- New chat
693:
694: sub chatsend {
695: my ($newentry,$anon)=@_;
696: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
697: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
698: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
699: &reply('chatsend:'.$cdom.':'.$cnum.':'.
700: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
701: &escape($newentry)),$chome);
702: }
703:
704: # ------------------------------------------ Find current version of a resource
705:
706: sub getversion {
707: my $fname=&clutter(shift);
708: unless ($fname=~/^\/res\//) { return -1; }
709: return ¤tversion(&filelocation('',$fname));
710: }
711:
712: sub currentversion {
713: my $fname=shift;
714: my $author=$fname;
715: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
716: my ($udom,$uname)=split(/\//,$author);
717: my $home=homeserver($uname,$udom);
718: if ($home eq 'no_host') {
719: return -1;
720: }
721: my $answer=reply("currentversion:$fname",$home);
722: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
723: return -1;
724: }
725: return $answer;
726: }
727:
728: # ----------------------------- Subscribe to a resource, return URL if possible
729:
730: sub subscribe {
731: my $fname=shift;
732: my $author=$fname;
733: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
734: my ($udom,$uname)=split(/\//,$author);
735: my $home=homeserver($uname,$udom);
736: if ($home eq 'no_host') {
737: return 'not_found';
738: }
739: my $answer=reply("sub:$fname",$home);
740: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
741: $answer.=' by '.$home;
742: }
743: return $answer;
744: }
745:
746: # -------------------------------------------------------------- Replicate file
747:
748: sub repcopy {
749: my $filename=shift;
750: $filename=~s/\/+/\//g;
751: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
752: my $transname="$filename.in.transfer";
753: if ((-e $filename) || (-e $transname)) { return OK; }
754: my $remoteurl=subscribe($filename);
755: if ($remoteurl =~ /^con_lost by/) {
756: &logthis("Subscribe returned $remoteurl: $filename");
757: return HTTP_SERVICE_UNAVAILABLE;
758: } elsif ($remoteurl eq 'not_found') {
759: &logthis("Subscribe returned not_found: $filename");
760: return HTTP_NOT_FOUND;
761: } elsif ($remoteurl =~ /^rejected by/) {
762: &logthis("Subscribe returned $remoteurl: $filename");
763: return FORBIDDEN;
764: } elsif ($remoteurl eq 'directory') {
765: return OK;
766: } else {
767: my $author=$filename;
768: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
769: my ($udom,$uname)=split(/\//,$author);
770: my $home=homeserver($uname,$udom);
771: unless ($home eq $perlvar{'lonHostID'}) {
772: my @parts=split(/\//,$filename);
773: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
774: if ($path ne "$perlvar{'lonDocRoot'}/res") {
775: &logthis("Malconfiguration for replication: $filename");
776: return HTTP_BAD_REQUEST;
777: }
778: my $count;
779: for ($count=5;$count<$#parts;$count++) {
780: $path.="/$parts[$count]";
781: if ((-e $path)!=1) {
782: mkdir($path,0777);
783: }
784: }
785: my $ua=new LWP::UserAgent;
786: my $request=new HTTP::Request('GET',"$remoteurl");
787: my $response=$ua->request($request,$transname);
788: if ($response->is_error()) {
789: unlink($transname);
790: my $message=$response->status_line;
791: &logthis("<font color=blue>WARNING:"
792: ." LWP get: $message: $filename</font>");
793: return HTTP_SERVICE_UNAVAILABLE;
794: } else {
795: if ($remoteurl!~/\.meta$/) {
796: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
797: my $mresponse=$ua->request($mrequest,$filename.'.meta');
798: if ($mresponse->is_error()) {
799: unlink($filename.'.meta');
800: &logthis(
801: "<font color=yellow>INFO: No metadata: $filename</font>");
802: }
803: }
804: rename($transname,$filename);
805: return OK;
806: }
807: }
808: }
809: }
810:
811: # --------------------------------------------------------- Server Side Include
812:
813: sub ssi {
814:
815: my ($fn,%form)=@_;
816:
817: my $ua=new LWP::UserAgent;
818:
819: my $request;
820:
821: if (%form) {
822: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
823: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
824: } else {
825: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
826: }
827:
828: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
829: my $response=$ua->request($request);
830:
831: return $response->content;
832: }
833:
834: # ------- Add a token to a remote URI's query string to vouch for access rights
835:
836: sub tokenwrapper {
837: my $uri=shift;
838: $uri=~s/^http\:\/\/([^\/]+)//;
839: $uri=~s/^\///;
840: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
841: my $token=$1;
842: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
843: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
844: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
845: (($uri=~/\?/)?'&':'?').'token='.$token.
846: '&tokenissued='.$perlvar{'lonHostID'};
847: } else {
848: return '/adm/notfound.html';
849: }
850: }
851:
852: # --------------- Take an uploaded file and put it into the userfiles directory
853: # input: name of form element, coursedoc=1 means this is for the course
854: # output: url of file in userspace
855:
856: sub userfileupload {
857: my ($formname,$coursedoc)=@_;
858: my $fname=$ENV{'form.'.$formname.'.filename'};
859: $fname=~s/\\/\//g;
860: $fname=~s/^.*\/([^\/]+)$/$1/;
861: unless ($fname) { return 'error: no uploaded file'; }
862: chop($ENV{'form.'.$formname});
863: # Create the directory if not present
864: my $docuname='';
865: my $docudom='';
866: my $docuhome='';
867: if ($coursedoc) {
868: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
869: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
870: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
871: } else {
872: $docuname=$ENV{'user.name'};
873: $docudom=$ENV{'user.domain'};
874: $docuhome=$ENV{'user.home'};
875: }
876: return
877: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
878: }
879:
880: sub finishuserfileupload {
881: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
882: my $path=$docudom.'/'.$docuname.'/';
883: my $filepath=$perlvar{'lonDocRoot'};
884: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
885: my $count;
886: for ($count=4;$count<=$#parts;$count++) {
887: $filepath.="/$parts[$count]";
888: if ((-e $filepath)!=1) {
889: mkdir($filepath,0777);
890: }
891: }
892: # Save the file
893: {
894: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
895: print $fh $ENV{'form.'.$formname};
896: }
897: # Notify homeserver to grep it
898: #
899:
900: my $fetchresult=
901: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
902: if ($fetchresult eq 'ok') {
903: #
904: # Return the URL to it
905: return '/uploaded/'.$path.$fname;
906: } else {
907: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
908: ' to host '.$docuhome.': '.$fetchresult);
909: return '/adm/notfound.html';
910: }
911: }
912:
913: # ------------------------------------------------------------------------- Log
914:
915: sub log {
916: my ($dom,$nam,$hom,$what)=@_;
917: return critical("log:$dom:$nam:$what",$hom);
918: }
919:
920: # ------------------------------------------------------------------ Course Log
921:
922: sub flushcourselogs {
923: &logthis('Flushing course log buffers');
924: foreach (keys %courselogs) {
925: my $crsid=$_;
926: if (&reply('log:'.$coursedombuf{$crsid}.':'.
927: &escape($courselogs{$crsid}),
928: $coursehombuf{$crsid}) eq 'ok') {
929: delete $courselogs{$crsid};
930: } else {
931: &logthis('Failed to flush log buffer for '.$crsid);
932: if (length($courselogs{$crsid})>40000) {
933: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
934: " exceeded maximum size, deleting.</font>");
935: delete $courselogs{$crsid};
936: }
937: }
938: }
939: &logthis('Flushing access logs');
940: foreach (keys %accesshash) {
941: my $entry=$_;
942: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
943: my %temphash=($entry => $accesshash{$entry});
944: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
945: delete $accesshash{$entry};
946: }
947: }
948: $dumpcount++;
949: }
950:
951: sub courselog {
952: my $what=shift;
953: $what=time.':'.$what;
954: unless ($ENV{'request.course.id'}) { return ''; }
955: $coursedombuf{$ENV{'request.course.id'}}=
956: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
957: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
958: $coursehombuf{$ENV{'request.course.id'}}=
959: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
960: if (defined $courselogs{$ENV{'request.course.id'}}) {
961: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
962: } else {
963: $courselogs{$ENV{'request.course.id'}}.=$what;
964: }
965: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
966: &flushcourselogs();
967: }
968: }
969:
970: sub courseacclog {
971: my $fnsymb=shift;
972: unless ($ENV{'request.course.id'}) { return ''; }
973: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
974: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
975: $what.=':POST';
976: foreach (keys %ENV) {
977: if ($_=~/^form\.(.*)/) {
978: $what.=':'.$1.'='.$ENV{$_};
979: }
980: }
981: }
982: &courselog($what);
983: }
984:
985: sub countacc {
986: my $url=&declutter(shift);
987: unless ($ENV{'request.course.id'}) { return ''; }
988: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
989: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
990: if (defined($accesshash{$key})) {
991: $accesshash{$key}++;
992: } else {
993: $accesshash{$key}=1;
994: }
995: }
996:
997: # ----------------------------------------------------------- Check out an item
998:
999: sub checkout {
1000: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1001: my $now=time;
1002: my $lonhost=$perlvar{'lonHostID'};
1003: my $infostr=&escape(
1004: 'CHECKOUTTOKEN&'.
1005: $tuname.'&'.
1006: $tudom.'&'.
1007: $tcrsid.'&'.
1008: $symb.'&'.
1009: $now.'&'.$ENV{'REMOTE_ADDR'});
1010: my $token=&reply('tmpput:'.$infostr,$lonhost);
1011: if ($token=~/^error\:/) {
1012: &logthis("<font color=blue>WARNING: ".
1013: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1014: "</font>");
1015: return '';
1016: }
1017:
1018: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1019: $token=~tr/a-z/A-Z/;
1020:
1021: my %infohash=('resource.0.outtoken' => $token,
1022: 'resource.0.checkouttime' => $now,
1023: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1024:
1025: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1026: return '';
1027: } else {
1028: &logthis("<font color=blue>WARNING: ".
1029: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1030: "</font>");
1031: }
1032:
1033: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1034: &escape('Checkout '.$infostr.' - '.
1035: $token)) ne 'ok') {
1036: return '';
1037: } else {
1038: &logthis("<font color=blue>WARNING: ".
1039: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1040: "</font>");
1041: }
1042: return $token;
1043: }
1044:
1045: # ------------------------------------------------------------ Check in an item
1046:
1047: sub checkin {
1048: my $token=shift;
1049: my $now=time;
1050: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1051: $lonhost=~tr/A-Z/a-z/;
1052: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1053: $dtoken=~s/\W/\_/g;
1054: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1055: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1056:
1057: unless (($tuname) && ($tudom)) {
1058: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1059: return '';
1060: }
1061:
1062: unless (&allowed('mgr',$tcrsid)) {
1063: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1064: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1065: return '';
1066: }
1067:
1068: my %infohash=('resource.0.intoken' => $token,
1069: 'resource.0.checkintime' => $now,
1070: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1071:
1072: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1073: return '';
1074: }
1075:
1076: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1077: &escape('Checkin - '.$token)) ne 'ok') {
1078: return '';
1079: }
1080:
1081: return ($symb,$tuname,$tudom,$tcrsid);
1082: }
1083:
1084: # --------------------------------------------- Set Expire Date for Spreadsheet
1085:
1086: sub expirespread {
1087: my ($uname,$udom,$stype,$usymb)=@_;
1088: my $cid=$ENV{'request.course.id'};
1089: if ($cid) {
1090: my $now=time;
1091: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1092: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1093: $ENV{'course.'.$cid.'.num'}.
1094: ':nohist_expirationdates:'.
1095: &escape($key).'='.$now,
1096: $ENV{'course.'.$cid.'.home'})
1097: }
1098: return 'ok';
1099: }
1100:
1101: # ----------------------------------------------------- Devalidate Spreadsheets
1102:
1103: sub devalidate {
1104: my $symb=shift;
1105: my $cid=$ENV{'request.course.id'};
1106: if ($cid) {
1107: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
1108: my $status=
1109: &del('nohist_calculatedsheets',
1110: [$key.'studentcalc'],
1111: $ENV{'course.'.$cid.'.domain'},
1112: $ENV{'course.'.$cid.'.num'})
1113: .' '.
1114: &del('nohist_calculatedsheets_'.$cid,
1115: [$key.'assesscalc:'.$symb]);
1116: unless ($status eq 'ok ok') {
1117: &logthis('Could not devalidate spreadsheet '.
1118: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
1119: $symb.': '.$status);
1120: }
1121: }
1122: }
1123:
1124: sub get_scalar {
1125: my ($string,$end) = @_;
1126: my $value;
1127: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1128: $value = $1;
1129: } elsif ($$string =~ s/^([^&]*?)&//) {
1130: $value = $1;
1131: }
1132: return &unescape($value);
1133: }
1134:
1135: sub array2str {
1136: my (@array) = @_;
1137: my $result=&arrayref2str(\@array);
1138: $result=~s/^__ARRAY_REF__//;
1139: $result=~s/__END_ARRAY_REF__$//;
1140: return $result;
1141: }
1142:
1143: sub arrayref2str {
1144: my ($arrayref) = @_;
1145: my $result='__ARRAY_REF__';
1146: foreach my $elem (@$arrayref) {
1147: if(ref($elem) eq 'ARRAY') {
1148: $result.=&arrayref2str($elem).'&';
1149: } elsif(ref($elem) eq 'HASH') {
1150: $result.=&hashref2str($elem).'&';
1151: } elsif(ref($elem)) {
1152: #print("Got a ref of ".(ref($elem))." skipping.");
1153: } else {
1154: $result.=&escape($elem).'&';
1155: }
1156: }
1157: $result=~s/\&$//;
1158: $result .= '__END_ARRAY_REF__';
1159: return $result;
1160: }
1161:
1162: sub hash2str {
1163: my (%hash) = @_;
1164: my $result=&hashref2str(\%hash);
1165: $result=~s/^__HASH_REF__//;
1166: $result=~s/__END_HASH_REF__$//;
1167: return $result;
1168: }
1169:
1170: sub hashref2str {
1171: my ($hashref)=@_;
1172: my $result='__HASH_REF__';
1173: foreach (keys(%$hashref)) {
1174: if (ref($_) eq 'ARRAY') {
1175: $result.=&arrayref2str($_).'=';
1176: } elsif (ref($_) eq 'HASH') {
1177: $result.=&hashref2str($_).'=';
1178: } elsif (ref($_)) {
1179: $result.='=';
1180: #print("Got a ref of ".(ref($_))." skipping.");
1181: } else {
1182: if ($_) {$result.=&escape($_).'=';} else { last; }
1183: }
1184:
1185: if(ref($hashref->{$_}) eq 'ARRAY') {
1186: $result.=&arrayref2str($hashref->{$_}).'&';
1187: } elsif(ref($hashref->{$_}) eq 'HASH') {
1188: $result.=&hashref2str($hashref->{$_}).'&';
1189: } elsif(ref($hashref->{$_})) {
1190: $result.='&';
1191: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1192: } else {
1193: $result.=&escape($hashref->{$_}).'&';
1194: }
1195: }
1196: $result=~s/\&$//;
1197: $result .= '__END_HASH_REF__';
1198: return $result;
1199: }
1200:
1201: sub str2hash {
1202: my ($string)=@_;
1203: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1204: return %$hash;
1205: }
1206:
1207: sub str2hashref {
1208: my ($string) = @_;
1209:
1210: my %hash;
1211:
1212: if($string !~ /^__HASH_REF__/) {
1213: if (! ($string eq '' || !defined($string))) {
1214: $hash{'error'}='Not hash reference';
1215: }
1216: return (\%hash, $string);
1217: }
1218:
1219: $string =~ s/^__HASH_REF__//;
1220:
1221: while($string !~ /^__END_HASH_REF__/) {
1222: #key
1223: my $key='';
1224: if($string =~ /^__HASH_REF__/) {
1225: ($key, $string)=&str2hashref($string);
1226: if(defined($key->{'error'})) {
1227: $hash{'error'}='Bad data';
1228: return (\%hash, $string);
1229: }
1230: } elsif($string =~ /^__ARRAY_REF__/) {
1231: ($key, $string)=&str2arrayref($string);
1232: if($key->[0] eq 'Array reference error') {
1233: $hash{'error'}='Bad data';
1234: return (\%hash, $string);
1235: }
1236: } else {
1237: $string =~ s/^(.*?)=//;
1238: $key=&unescape($1);
1239: }
1240: $string =~ s/^=//;
1241:
1242: #value
1243: my $value='';
1244: if($string =~ /^__HASH_REF__/) {
1245: ($value, $string)=&str2hashref($string);
1246: if(defined($value->{'error'})) {
1247: $hash{'error'}='Bad data';
1248: return (\%hash, $string);
1249: }
1250: } elsif($string =~ /^__ARRAY_REF__/) {
1251: ($value, $string)=&str2arrayref($string);
1252: if($value->[0] eq 'Array reference error') {
1253: $hash{'error'}='Bad data';
1254: return (\%hash, $string);
1255: }
1256: } else {
1257: $value=&get_scalar(\$string,'__END_HASH_REF__');
1258: }
1259: $string =~ s/^&//;
1260:
1261: $hash{$key}=$value;
1262: }
1263:
1264: $string =~ s/^__END_HASH_REF__//;
1265:
1266: return (\%hash, $string);
1267: }
1268:
1269: sub str2array {
1270: my ($string)=@_;
1271: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1272: return @$array;
1273: }
1274:
1275: sub str2arrayref {
1276: my ($string) = @_;
1277: my @array;
1278:
1279: if($string !~ /^__ARRAY_REF__/) {
1280: if (! ($string eq '' || !defined($string))) {
1281: $array[0]='Array reference error';
1282: }
1283: return (\@array, $string);
1284: }
1285:
1286: $string =~ s/^__ARRAY_REF__//;
1287:
1288: while($string !~ /^__END_ARRAY_REF__/) {
1289: my $value='';
1290: if($string =~ /^__HASH_REF__/) {
1291: ($value, $string)=&str2hashref($string);
1292: if(defined($value->{'error'})) {
1293: $array[0] ='Array reference error';
1294: return (\@array, $string);
1295: }
1296: } elsif($string =~ /^__ARRAY_REF__/) {
1297: ($value, $string)=&str2arrayref($string);
1298: if($value->[0] eq 'Array reference error') {
1299: $array[0] ='Array reference error';
1300: return (\@array, $string);
1301: }
1302: } else {
1303: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1304: }
1305: $string =~ s/^&//;
1306:
1307: push(@array, $value);
1308: }
1309:
1310: $string =~ s/^__END_ARRAY_REF__//;
1311:
1312: return (\@array, $string);
1313: }
1314:
1315: # -------------------------------------------------------------------Temp Store
1316:
1317: sub tmpreset {
1318: my ($symb,$namespace,$domain,$stuname) = @_;
1319: if (!$symb) {
1320: $symb=&symbread();
1321: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1322: }
1323: $symb=escape($symb);
1324:
1325: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1326: $namespace=~s/\//\_/g;
1327: $namespace=~s/\W//g;
1328:
1329: #FIXME needs to do something for /pub resources
1330: if (!$domain) { $domain=$ENV{'user.domain'}; }
1331: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1332: my $path=$perlvar{'lonDaemons'}.'/tmp';
1333: my %hash;
1334: if (tie(%hash,'GDBM_File',
1335: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1336: &GDBM_WRCREAT(),0640)) {
1337: foreach my $key (keys %hash) {
1338: if ($key=~ /:$symb/) {
1339: delete($hash{$key});
1340: }
1341: }
1342: }
1343: }
1344:
1345: sub tmpstore {
1346: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1347:
1348: if (!$symb) {
1349: $symb=&symbread();
1350: if (!$symb) { $symb= $ENV{'request.url'}; }
1351: }
1352: $symb=escape($symb);
1353:
1354: if (!$namespace) {
1355: # I don't think we would ever want to store this for a course.
1356: # it seems this will only be used if we don't have a course.
1357: #$namespace=$ENV{'request.course.id'};
1358: #if (!$namespace) {
1359: $namespace=$ENV{'request.state'};
1360: #}
1361: }
1362: $namespace=~s/\//\_/g;
1363: $namespace=~s/\W//g;
1364: #FIXME needs to do something for /pub resources
1365: if (!$domain) { $domain=$ENV{'user.domain'}; }
1366: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1367: my $now=time;
1368: my %hash;
1369: my $path=$perlvar{'lonDaemons'}.'/tmp';
1370: if (tie(%hash,'GDBM_File',
1371: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1372: &GDBM_WRCREAT(),0640)) {
1373: $hash{"version:$symb"}++;
1374: my $version=$hash{"version:$symb"};
1375: my $allkeys='';
1376: foreach my $key (keys(%$storehash)) {
1377: $allkeys.=$key.':';
1378: $hash{"$version:$symb:$key"}=$$storehash{$key};
1379: }
1380: $hash{"$version:$symb:timestamp"}=$now;
1381: $allkeys.='timestamp';
1382: $hash{"$version:keys:$symb"}=$allkeys;
1383: if (untie(%hash)) {
1384: return 'ok';
1385: } else {
1386: return "error:$!";
1387: }
1388: } else {
1389: return "error:$!";
1390: }
1391: }
1392:
1393: # -----------------------------------------------------------------Temp Restore
1394:
1395: sub tmprestore {
1396: my ($symb,$namespace,$domain,$stuname) = @_;
1397:
1398: if (!$symb) {
1399: $symb=&symbread();
1400: if (!$symb) { $symb= $ENV{'request.url'}; }
1401: }
1402: $symb=escape($symb);
1403:
1404: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1405: #FIXME needs to do something for /pub resources
1406: if (!$domain) { $domain=$ENV{'user.domain'}; }
1407: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1408:
1409: my %returnhash;
1410: $namespace=~s/\//\_/g;
1411: $namespace=~s/\W//g;
1412: my %hash;
1413: my $path=$perlvar{'lonDaemons'}.'/tmp';
1414: if (tie(%hash,'GDBM_File',
1415: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1416: &GDBM_READER(),0640)) {
1417: my $version=$hash{"version:$symb"};
1418: $returnhash{'version'}=$version;
1419: my $scope;
1420: for ($scope=1;$scope<=$version;$scope++) {
1421: my $vkeys=$hash{"$scope:keys:$symb"};
1422: my @keys=split(/:/,$vkeys);
1423: my $key;
1424: $returnhash{"$scope:keys"}=$vkeys;
1425: foreach $key (@keys) {
1426: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1427: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1428: }
1429: }
1430: if (!(untie(%hash))) {
1431: return "error:$!";
1432: }
1433: } else {
1434: return "error:$!";
1435: }
1436: return %returnhash;
1437: }
1438:
1439: # ----------------------------------------------------------------------- Store
1440:
1441: sub store {
1442: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1443: my $home='';
1444:
1445: if ($stuname) { $home=&homeserver($stuname,$domain); }
1446:
1447: $symb=&symbclean($symb);
1448: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1449:
1450: &devalidate($symb);
1451:
1452: $symb=escape($symb);
1453: if (!$namespace) {
1454: unless ($namespace=$ENV{'request.course.id'}) {
1455: return '';
1456: }
1457: }
1458: if (!$domain) { $domain=$ENV{'user.domain'}; }
1459: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1460: if (!$home) { $home=$ENV{'user.home'}; }
1461: my $namevalue='';
1462: foreach (keys %$storehash) {
1463: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1464: }
1465: $namevalue=~s/\&$//;
1466: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1467: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1468: }
1469:
1470: # -------------------------------------------------------------- Critical Store
1471:
1472: sub cstore {
1473: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1474: my $home='';
1475:
1476: if ($stuname) { $home=&homeserver($stuname,$domain); }
1477:
1478: $symb=&symbclean($symb);
1479: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1480:
1481: &devalidate($symb);
1482:
1483: $symb=escape($symb);
1484: if (!$namespace) {
1485: unless ($namespace=$ENV{'request.course.id'}) {
1486: return '';
1487: }
1488: }
1489: if (!$domain) { $domain=$ENV{'user.domain'}; }
1490: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1491: if (!$home) { $home=$ENV{'user.home'}; }
1492:
1493: my $namevalue='';
1494: foreach (keys %$storehash) {
1495: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1496: }
1497: $namevalue=~s/\&$//;
1498: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1499: return critical
1500: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1501: }
1502:
1503: # --------------------------------------------------------------------- Restore
1504:
1505: sub restore {
1506: my ($symb,$namespace,$domain,$stuname) = @_;
1507: my $home='';
1508:
1509: if ($stuname) { $home=&homeserver($stuname,$domain); }
1510:
1511: if (!$symb) {
1512: unless ($symb=escape(&symbread())) { return ''; }
1513: } else {
1514: $symb=&escape(&symbclean($symb));
1515: }
1516: if (!$namespace) {
1517: unless ($namespace=$ENV{'request.course.id'}) {
1518: return '';
1519: }
1520: }
1521: if (!$domain) { $domain=$ENV{'user.domain'}; }
1522: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1523: if (!$home) { $home=$ENV{'user.home'}; }
1524: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1525:
1526: my %returnhash=();
1527: foreach (split(/\&/,$answer)) {
1528: my ($name,$value)=split(/\=/,$_);
1529: $returnhash{&unescape($name)}=&unescape($value);
1530: }
1531: my $version;
1532: for ($version=1;$version<=$returnhash{'version'};$version++) {
1533: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1534: $returnhash{$_}=$returnhash{$version.':'.$_};
1535: }
1536: }
1537: return %returnhash;
1538: }
1539:
1540: # ---------------------------------------------------------- Course Description
1541:
1542: sub coursedescription {
1543: my $courseid=shift;
1544: $courseid=~s/^\///;
1545: $courseid=~s/\_/\//g;
1546: my ($cdomain,$cnum)=split(/\//,$courseid);
1547: my $chome=&homeserver($cnum,$cdomain);
1548: my $normalid=$cdomain.'_'.$cnum;
1549: # need to always cache even if we get errors otherwise we keep
1550: # trying and trying and trying to get the course description.
1551: my %envhash=();
1552: my %returnhash=();
1553: $envhash{'course.'.$normalid.'.last_cache'}=time;
1554: if ($chome ne 'no_host') {
1555: %returnhash=&dump('environment',$cdomain,$cnum);
1556: if (!exists($returnhash{'con_lost'})) {
1557: $returnhash{'home'}= $chome;
1558: $returnhash{'domain'} = $cdomain;
1559: $returnhash{'num'} = $cnum;
1560: while (my ($name,$value) = each %returnhash) {
1561: $envhash{'course.'.$normalid.'.'.$name}=$value;
1562: }
1563: $returnhash{'url'}=&clutter($returnhash{'url'});
1564: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1565: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1566: $envhash{'course.'.$normalid.'.home'}=$chome;
1567: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1568: $envhash{'course.'.$normalid.'.num'}=$cnum;
1569: }
1570: }
1571: &appenv(%envhash);
1572: return %returnhash;
1573: }
1574:
1575: # -------------------------------------------------------- Get user privileges
1576:
1577: sub rolesinit {
1578: my ($domain,$username,$authhost)=@_;
1579: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1580: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1581: my %allroles=();
1582: my %thesepriv=();
1583: my $now=time;
1584: my $userroles="user.login.time=$now\n";
1585: my $thesestr;
1586:
1587: if ($rolesdump ne '') {
1588: foreach (split(/&/,$rolesdump)) {
1589: if ($_!~/^rolesdef\&/) {
1590: my ($area,$role)=split(/=/,$_);
1591: $area=~s/\_\w\w$//;
1592: my ($trole,$tend,$tstart)=split(/_/,$role);
1593: $userroles.='user.role.'.$trole.'.'.$area.'='.
1594: $tstart.'.'.$tend."\n";
1595: if ($tend!=0) {
1596: if ($tend<$now) {
1597: $trole='';
1598: }
1599: }
1600: if ($tstart!=0) {
1601: if ($tstart>$now) {
1602: $trole='';
1603: }
1604: }
1605: if (($area ne '') && ($trole ne '')) {
1606: my $spec=$trole.'.'.$area;
1607: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1608: if ($trole =~ /^cr\//) {
1609: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1610: my $homsvr=homeserver($rauthor,$rdomain);
1611: if ($hostname{$homsvr} ne '') {
1612: my $roledef=
1613: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1614: $homsvr);
1615: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1616: my ($syspriv,$dompriv,$coursepriv)=
1617: split(/\_/,unescape($roledef));
1618: $allroles{'cm./'}.=':'.$syspriv;
1619: $allroles{$spec.'./'}.=':'.$syspriv;
1620: if ($tdomain ne '') {
1621: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1622: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1623: if ($trest ne '') {
1624: $allroles{'cm.'.$area}.=':'.$coursepriv;
1625: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1626: }
1627: }
1628: }
1629: }
1630: } else {
1631: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1632: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1633: if ($tdomain ne '') {
1634: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1635: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1636: if ($trest ne '') {
1637: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1638: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1639: }
1640: }
1641: }
1642: }
1643: }
1644: }
1645: my $adv=0;
1646: my $author=0;
1647: foreach (keys %allroles) {
1648: %thesepriv=();
1649: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1650: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1651: foreach (split(/:/,$allroles{$_})) {
1652: if ($_ ne '') {
1653: my ($privilege,$restrictions)=split(/&/,$_);
1654: if ($restrictions eq '') {
1655: $thesepriv{$privilege}='F';
1656: } else {
1657: if ($thesepriv{$privilege} ne 'F') {
1658: $thesepriv{$privilege}.=$restrictions;
1659: }
1660: }
1661: }
1662: }
1663: $thesestr='';
1664: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1665: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1666: }
1667: $userroles.='user.adv='.$adv."\n".
1668: 'user.author='.$author."\n";
1669: $ENV{'user.adv'}=$adv;
1670: }
1671: return $userroles;
1672: }
1673:
1674: # --------------------------------------------------------------- get interface
1675:
1676: sub get {
1677: my ($namespace,$storearr,$udomain,$uname)=@_;
1678: my $items='';
1679: foreach (@$storearr) {
1680: $items.=escape($_).'&';
1681: }
1682: $items=~s/\&$//;
1683: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1684: if (!$uname) { $uname=$ENV{'user.name'}; }
1685: my $uhome=&homeserver($uname,$udomain);
1686:
1687: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1688: my @pairs=split(/\&/,$rep);
1689: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1690: return @pairs;
1691: }
1692: my %returnhash=();
1693: my $i=0;
1694: foreach (@$storearr) {
1695: $returnhash{$_}=unescape($pairs[$i]);
1696: $i++;
1697: }
1698: return %returnhash;
1699: }
1700:
1701: # --------------------------------------------------------------- del interface
1702:
1703: sub del {
1704: my ($namespace,$storearr,$udomain,$uname)=@_;
1705: my $items='';
1706: foreach (@$storearr) {
1707: $items.=escape($_).'&';
1708: }
1709: $items=~s/\&$//;
1710: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1711: if (!$uname) { $uname=$ENV{'user.name'}; }
1712: my $uhome=&homeserver($uname,$udomain);
1713:
1714: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1715: }
1716:
1717: # -------------------------------------------------------------- dump interface
1718:
1719: sub dump {
1720: my ($namespace,$udomain,$uname,$regexp)=@_;
1721: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1722: if (!$uname) { $uname=$ENV{'user.name'}; }
1723: my $uhome=&homeserver($uname,$udomain);
1724: if ($regexp) {
1725: $regexp=&escape($regexp);
1726: } else {
1727: $regexp='.';
1728: }
1729: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1730: my @pairs=split(/\&/,$rep);
1731: my %returnhash=();
1732: foreach (@pairs) {
1733: my ($key,$value)=split(/=/,$_);
1734: $returnhash{unescape($key)}=unescape($value);
1735: }
1736: return %returnhash;
1737: }
1738:
1739: # --------------------------------------------------------------- put interface
1740:
1741: sub put {
1742: my ($namespace,$storehash,$udomain,$uname)=@_;
1743: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1744: if (!$uname) { $uname=$ENV{'user.name'}; }
1745: my $uhome=&homeserver($uname,$udomain);
1746: my $items='';
1747: foreach (keys %$storehash) {
1748: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1749: }
1750: $items=~s/\&$//;
1751: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1752: }
1753:
1754: # ------------------------------------------------------ critical put interface
1755:
1756: sub cput {
1757: my ($namespace,$storehash,$udomain,$uname)=@_;
1758: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1759: if (!$uname) { $uname=$ENV{'user.name'}; }
1760: my $uhome=&homeserver($uname,$udomain);
1761: my $items='';
1762: foreach (keys %$storehash) {
1763: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1764: }
1765: $items=~s/\&$//;
1766: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1767: }
1768:
1769: # -------------------------------------------------------------- eget interface
1770:
1771: sub eget {
1772: my ($namespace,$storearr,$udomain,$uname)=@_;
1773: my $items='';
1774: foreach (@$storearr) {
1775: $items.=escape($_).'&';
1776: }
1777: $items=~s/\&$//;
1778: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1779: if (!$uname) { $uname=$ENV{'user.name'}; }
1780: my $uhome=&homeserver($uname,$udomain);
1781: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1782: my @pairs=split(/\&/,$rep);
1783: my %returnhash=();
1784: my $i=0;
1785: foreach (@$storearr) {
1786: $returnhash{$_}=unescape($pairs[$i]);
1787: $i++;
1788: }
1789: return %returnhash;
1790: }
1791:
1792: # ------------------------------------------------- Check for a user privilege
1793:
1794: sub allowed {
1795: my ($priv,$uri)=@_;
1796:
1797: my $orguri=$uri;
1798: $uri=&declutter($uri);
1799:
1800: # Free bre access to adm and meta resources
1801:
1802: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1803: return 'F';
1804: }
1805:
1806: # Free bre to public access
1807:
1808: if ($priv eq 'bre') {
1809: my $copyright=&metadata($uri,'copyright');
1810: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
1811: return 'F';
1812: }
1813: if ($copyright eq 'priv') {
1814: $uri=~/([^\/]+)\/([^\/]+)\//;
1815: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
1816: return '';
1817: }
1818: }
1819: if ($copyright eq 'domain') {
1820: $uri=~/([^\/]+)\/([^\/]+)\//;
1821: unless (($ENV{'user.domain'} eq $1) ||
1822: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
1823: return '';
1824: }
1825: }
1826: if ($ENV{'request.role'}=~ /li\.\//) {
1827: # Library role, so allow browsing of resources in this domain.
1828: return 'F';
1829: }
1830: }
1831: # Domain coordinator is trying to create a course
1832: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
1833: # uri is the requested domain in this case.
1834: # comparison to 'request.role.domain' shows if the user has selected
1835: # a role of dc for the domain in question.
1836: return 'F' if ($uri eq $ENV{'request.role.domain'});
1837: }
1838:
1839: my $thisallowed='';
1840: my $statecond=0;
1841: my $courseprivid='';
1842:
1843: # Course
1844:
1845: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1846: $thisallowed.=$1;
1847: }
1848:
1849: # Domain
1850:
1851: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1852: =~/$priv\&([^\:]*)/) {
1853: $thisallowed.=$1;
1854: }
1855:
1856: # Course: uri itself is a course
1857: my $courseuri=$uri;
1858: $courseuri=~s/\_(\d)/\/$1/;
1859: $courseuri=~s/^([^\/])/\/$1/;
1860:
1861: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1862: =~/$priv\&([^\:]*)/) {
1863: $thisallowed.=$1;
1864: }
1865:
1866: # Full access at system, domain or course-wide level? Exit.
1867:
1868: if ($thisallowed=~/F/) {
1869: return 'F';
1870: }
1871:
1872: # If this is generating or modifying users, exit with special codes
1873:
1874: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1875: return $thisallowed;
1876: }
1877: #
1878: # Gathered so far: system, domain and course wide privileges
1879: #
1880: # Course: See if uri or referer is an individual resource that is part of
1881: # the course
1882:
1883: if ($ENV{'request.course.id'}) {
1884:
1885: $courseprivid=$ENV{'request.course.id'};
1886: if ($ENV{'request.course.sec'}) {
1887: $courseprivid.='/'.$ENV{'request.course.sec'};
1888: }
1889: $courseprivid=~s/\_/\//;
1890: my $checkreferer=1;
1891: my ($match,$cond)=&is_on_map($uri);
1892: if ($match) {
1893: $statecond=$cond;
1894: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1895: =~/$priv\&([^\:]*)/) {
1896: $thisallowed.=$1;
1897: $checkreferer=0;
1898: }
1899: }
1900:
1901: if ($checkreferer) {
1902: my $refuri=$ENV{'httpref.'.$orguri};
1903: unless ($refuri) {
1904: foreach (keys %ENV) {
1905: if ($_=~/^httpref\..*\*/) {
1906: my $pattern=$_;
1907: $pattern=~s/^httpref\.\/res\///;
1908: $pattern=~s/\*/\[\^\/\]\+/g;
1909: $pattern=~s/\//\\\//g;
1910: if ($orguri=~/$pattern/) {
1911: $refuri=$ENV{$_};
1912: }
1913: }
1914: }
1915: }
1916:
1917: if ($refuri) {
1918: $refuri=&declutter($refuri);
1919: my ($match,$cond)=&is_on_map($refuri);
1920: if ($match) {
1921: my $refstatecond=$cond;
1922: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1923: =~/$priv\&([^\:]*)/) {
1924: $thisallowed.=$1;
1925: $uri=$refuri;
1926: $statecond=$refstatecond;
1927: }
1928: }
1929: }
1930: }
1931: }
1932:
1933: #
1934: # Gathered now: all privileges that could apply, and condition number
1935: #
1936: #
1937: # Full or no access?
1938: #
1939:
1940: if ($thisallowed=~/F/) {
1941: return 'F';
1942: }
1943:
1944: unless ($thisallowed) {
1945: return '';
1946: }
1947:
1948: # Restrictions exist, deal with them
1949: #
1950: # C:according to course preferences
1951: # R:according to resource settings
1952: # L:unless locked
1953: # X:according to user session state
1954: #
1955:
1956: # Possibly locked functionality, check all courses
1957: # Locks might take effect only after 10 minutes cache expiration for other
1958: # courses, and 2 minutes for current course
1959:
1960: my $envkey;
1961: if ($thisallowed=~/L/) {
1962: foreach $envkey (keys %ENV) {
1963: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1964: my $courseid=$2;
1965: my $roleid=$1.'.'.$2;
1966: $courseid=~s/^\///;
1967: my $expiretime=600;
1968: if ($ENV{'request.role'} eq $roleid) {
1969: $expiretime=120;
1970: }
1971: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1972: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1973: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1974: &coursedescription($courseid);
1975: }
1976: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1977: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1978: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1979: &log($ENV{'user.domain'},$ENV{'user.name'},
1980: $ENV{'user.home'},
1981: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1982: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1983: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1984: return '';
1985: }
1986: }
1987: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1988: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1989: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1990: &log($ENV{'user.domain'},$ENV{'user.name'},
1991: $ENV{'user.home'},
1992: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1993: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1994: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1995: return '';
1996: }
1997: }
1998: }
1999: }
2000: }
2001:
2002: #
2003: # Rest of the restrictions depend on selected course
2004: #
2005:
2006: unless ($ENV{'request.course.id'}) {
2007: return '1';
2008: }
2009:
2010: #
2011: # Now user is definitely in a course
2012: #
2013:
2014:
2015: # Course preferences
2016:
2017: if ($thisallowed=~/C/) {
2018: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2019: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2020: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2021: =~/$rolecode/) {
2022: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2023: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2024: $ENV{'request.course.id'});
2025: return '';
2026: }
2027:
2028: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2029: =~/$unamedom/) {
2030: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2031: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2032: $ENV{'request.course.id'});
2033: return '';
2034: }
2035: }
2036:
2037: # Resource preferences
2038:
2039: if ($thisallowed=~/R/) {
2040: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2041: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
2042: if (-e $filename) {
2043: my @content;
2044: {
2045: my $fh=Apache::File->new($filename);
2046: @content=<$fh>;
2047: }
2048: if (join('',@content)=~
2049: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
2050: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2051: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2052: return '';
2053:
2054: }
2055: }
2056: }
2057:
2058: # Restricted by state or randomout?
2059:
2060: if ($thisallowed=~/X/) {
2061: if ($ENV{'acc.randomout'}) {
2062: my $symb=&symbread($uri,1);
2063: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2064: return '';
2065: }
2066: }
2067: if (&condval($statecond)) {
2068: return '2';
2069: } else {
2070: return '';
2071: }
2072: }
2073:
2074: return 'F';
2075: }
2076:
2077: # --------------------------------------------------- Is a resource on the map?
2078:
2079: sub is_on_map {
2080: my $uri=&declutter(shift);
2081: my @uriparts=split(/\//,$uri);
2082: my $filename=$uriparts[$#uriparts];
2083: my $pathname=$uri;
2084: $pathname=~s|/\Q$filename\E$||;
2085: #Trying to find the conditional for the file
2086: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2087: /\&\Q$filename\E\:([\d\|]+)\&/);
2088: if ($match) {
2089: return (1,$1);
2090: } else {
2091: return (0,0);
2092: }
2093: }
2094:
2095: # ----------------------------------------------------------------- Define Role
2096:
2097: sub definerole {
2098: if (allowed('mcr','/')) {
2099: my ($rolename,$sysrole,$domrole,$courole)=@_;
2100: foreach (split('/',$sysrole)) {
2101: my ($crole,$cqual)=split(/\&/,$_);
2102: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2103: if ($pr{'cr:s'}=~/$crole\&/) {
2104: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2105: return "refused:s:$crole&$cqual";
2106: }
2107: }
2108: }
2109: foreach (split('/',$domrole)) {
2110: my ($crole,$cqual)=split(/\&/,$_);
2111: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2112: if ($pr{'cr:d'}=~/$crole\&/) {
2113: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2114: return "refused:d:$crole&$cqual";
2115: }
2116: }
2117: }
2118: foreach (split('/',$courole)) {
2119: my ($crole,$cqual)=split(/\&/,$_);
2120: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2121: if ($pr{'cr:c'}=~/$crole\&/) {
2122: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2123: return "refused:c:$crole&$cqual";
2124: }
2125: }
2126: }
2127: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2128: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2129: "rolesdef_$rolename=".
2130: escape($sysrole.'_'.$domrole.'_'.$courole);
2131: return reply($command,$ENV{'user.home'});
2132: } else {
2133: return 'refused';
2134: }
2135: }
2136:
2137: # ---------------- Make a metadata query against the network of library servers
2138:
2139: sub metadata_query {
2140: my ($query,$custom,$customshow,$server_array)=@_;
2141: my %rhash;
2142: my @server_list = (defined($server_array) ? @$server_array
2143: : keys(%libserv) );
2144: for my $server (@server_list) {
2145: unless ($custom or $customshow) {
2146: my $reply=&reply("querysend:".&escape($query),$server);
2147: $rhash{$server}=$reply;
2148: }
2149: else {
2150: my $reply=&reply("querysend:".&escape($query).':'.
2151: &escape($custom).':'.&escape($customshow),
2152: $server);
2153: $rhash{$server}=$reply;
2154: }
2155: }
2156: return \%rhash;
2157: }
2158:
2159: # ----------------------------------------- Send log queries and wait for reply
2160:
2161: sub log_query {
2162: my ($uname,$udom,$query,%filters)=@_;
2163: my $uhome=&homeserver($uname,$udom);
2164: if ($uhome eq 'no_host') { return 'error: no_host'; }
2165: my $uhost=$hostname{$uhome};
2166: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2167: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2168: $uhome);
2169: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2170: return get_query_reply($queryid);
2171: }
2172:
2173: sub get_query_reply {
2174: my $queryid=shift;
2175: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2176: my $reply='';
2177: for (1..100) {
2178: sleep 2;
2179: if (-e $replyfile.'.end') {
2180: if (my $fh=Apache::File->new($replyfile)) {
2181: $reply.=<$fh>;
2182: $fh->close;
2183: } else { return 'error: reply_file_error'; }
2184: return &unescape($reply);
2185: }
2186: }
2187: return 'timeout:'.$queryid;
2188: }
2189:
2190: sub courselog_query {
2191: #
2192: # possible filters:
2193: # url: url or symb
2194: # username
2195: # domain
2196: # action: view, submit, grade
2197: # start: timestamp
2198: # end: timestamp
2199: #
2200: my (%filters)=@_;
2201: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2202: if ($filters{'url'}) {
2203: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2204: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2205: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2206: }
2207: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2208: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2209: return &log_query($cname,$cdom,'courselog',%filters);
2210: }
2211:
2212: sub userlog_query {
2213: my ($uname,$udom,%filters)=@_;
2214: return &log_query($uname,$udom,'userlog',%filters);
2215: }
2216:
2217: # ------------------------------------------------------------------ Plain Text
2218:
2219: sub plaintext {
2220: my $short=shift;
2221: return $prp{$short};
2222: }
2223:
2224: # ----------------------------------------------------------------- Assign Role
2225:
2226: sub assignrole {
2227: my ($udom,$uname,$url,$role,$end,$start)=@_;
2228: my $mrole;
2229: if ($role =~ /^cr\//) {
2230: unless (&allowed('ccr',$url)) {
2231: &logthis('Refused custom assignrole: '.
2232: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2233: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2234: return 'refused';
2235: }
2236: $mrole='cr';
2237: } else {
2238: my $cwosec=$url;
2239: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2240: unless (&allowed('c'.$role,$cwosec)) {
2241: &logthis('Refused assignrole: '.
2242: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2243: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2244: return 'refused';
2245: }
2246: $mrole=$role;
2247: }
2248: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2249: "$udom:$uname:$url".'_'."$mrole=$role";
2250: if ($end) { $command.='_'.$end; }
2251: if ($start) {
2252: if ($end) {
2253: $command.='_'.$start;
2254: } else {
2255: $command.='_0_'.$start;
2256: }
2257: }
2258: return &reply($command,&homeserver($uname,$udom));
2259: }
2260:
2261: # -------------------------------------------------- Modify user authentication
2262: # Overrides without validation
2263:
2264: sub modifyuserauth {
2265: my ($udom,$uname,$umode,$upass)=@_;
2266: my $uhome=&homeserver($uname,$udom);
2267: unless (&allowed('mau',$udom)) { return 'refused'; }
2268: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2269: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2270: ' in domain '.$ENV{'request.role.domain'});
2271: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2272: &escape($upass),$uhome);
2273: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2274: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2275: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2276: &log($udom,,$uname,$uhome,
2277: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2278: $ENV{'user.name'}.', '.$umode.
2279: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2280: unless ($reply eq 'ok') {
2281: &logthis('Authentication mode error: '.$reply);
2282: return 'error: '.$reply;
2283: }
2284: return 'ok';
2285: }
2286:
2287: # --------------------------------------------------------------- Modify a user
2288:
2289: sub modifyuser {
2290: my ($udom, $uname, $uid,
2291: $umode, $upass, $first,
2292: $middle, $last, $gene,
2293: $forceid, $desiredhome)=@_;
2294: $udom=~s/\W//g;
2295: $uname=~s/\W//g;
2296: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2297: $umode.', '.$first.', '.$middle.', '.
2298: $last.', '.$gene.'(forceid: '.$forceid.')'.
2299: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2300: ' desiredhome not specified').
2301: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2302: ' in domain '.$ENV{'request.role.domain'});
2303: my $uhome=&homeserver($uname,$udom,'true');
2304: # ----------------------------------------------------------------- Create User
2305: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2306: my $unhome='';
2307: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2308: $unhome = $desiredhome;
2309: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2310: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2311: } else { # load balancing routine for determining $unhome
2312: my $tryserver;
2313: my $loadm=10000000;
2314: foreach $tryserver (keys %libserv) {
2315: if ($hostdom{$tryserver} eq $udom) {
2316: my $answer=reply('load',$tryserver);
2317: if (($answer=~/\d+/) && ($answer<$loadm)) {
2318: $loadm=$answer;
2319: $unhome=$tryserver;
2320: }
2321: }
2322: }
2323: }
2324: if (($unhome eq '') || ($unhome eq 'no_host')) {
2325: return 'error: unable to find a home server for '.$uname.
2326: ' in domain '.$udom;
2327: }
2328: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2329: &escape($upass),$unhome);
2330: unless ($reply eq 'ok') {
2331: return 'error: '.$reply;
2332: }
2333: $uhome=&homeserver($uname,$udom,'true');
2334: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2335: return 'error: verify home';
2336: }
2337: } # End of creation of new user
2338: # ---------------------------------------------------------------------- Add ID
2339: if ($uid) {
2340: $uid=~tr/A-Z/a-z/;
2341: my %uidhash=&idrget($udom,$uname);
2342: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2343: && (!$forceid)) {
2344: unless ($uid eq $uidhash{$uname}) {
2345: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2346: }
2347: } else {
2348: &idput($udom,($uname => $uid));
2349: }
2350: }
2351: # -------------------------------------------------------------- Add names, etc
2352: my %names=&get('environment',
2353: ['firstname','middlename','lastname','generation'],
2354: $udom,$uname);
2355: if ($names{'firstname'} =~ m/^error:.*/) { %names=(); }
2356: if ($first) { $names{'firstname'} = $first; }
2357: if ($middle) { $names{'middlename'} = $middle; }
2358: if ($last) { $names{'lastname'} = $last; }
2359: if ($gene) { $names{'generation'} = $gene; }
2360: my $reply = &put('environment', \%names, $udom,$uname);
2361: if ($reply ne 'ok') { return 'error: '.$reply; }
2362: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2363: $umode.', '.$first.', '.$middle.', '.
2364: $last.', '.$gene.' by '.
2365: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2366: return 'ok';
2367: }
2368:
2369: # -------------------------------------------------------------- Modify student
2370:
2371: sub modifystudent {
2372: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2373: $end,$start,$forceid,$desiredhome)=@_;
2374: my $cid='';
2375: unless ($cid=$ENV{'request.course.id'}) {
2376: return 'not_in_class';
2377: }
2378: # --------------------------------------------------------------- Make the user
2379: my $reply=&modifyuser
2380: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2381: $desiredhome);
2382: unless ($reply eq 'ok') { return $reply; }
2383: # This will cause &modify_student_enrollment to get the uid from the
2384: # students environment
2385: $uid = undef if (!$forceid);
2386: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2387: $last,$gene,$usec,$end,$start);
2388: return $reply;
2389: }
2390:
2391: sub modify_student_enrollment {
2392: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2393: # Get the course id from the environment
2394: my $cid='';
2395: unless ($cid=$ENV{'request.course.id'}) {
2396: return 'not_in_class';
2397: }
2398: # Make sure the user exists
2399: my $uhome=&homeserver($uname,$udom);
2400: if (($uhome eq '') || ($uhome eq 'no_host')) {
2401: return 'error: no such user';
2402: }
2403: #
2404: # Get student data if we were not given enough information
2405: if (!defined($first) || $first eq '' ||
2406: !defined($last) || $last eq '' ||
2407: !defined($uid) || $uid eq '' ||
2408: !defined($middle) || $middle eq '' ||
2409: !defined($gene) || $gene eq '') {
2410: # They did not supply us with enough data to enroll the student, so
2411: # we need to pick up more information.
2412: my %tmp = &get('environment',
2413: ['firstname','middlename','lastname', 'generation','id']
2414: ,$udom,$uname);
2415:
2416: foreach (keys(%tmp)) {
2417: &logthis("key $_ = ".$tmp{$_});
2418: }
2419: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2420: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2421: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
2422: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
2423: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2424: }
2425: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2426: $first,$middle);
2427: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2428: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2429: &escape($uname.':'.$udom).'='.
2430: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
2431: $ENV{'course.'.$cid.'.home'});
2432: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2433: return 'error: '.$reply;
2434: }
2435: # Add student role to user
2436: my $uurl='/'.$cid;
2437: $uurl=~s/\_/\//g;
2438: if ($usec) {
2439: $uurl.='/'.$usec;
2440: }
2441: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2442: }
2443:
2444: # ------------------------------------------------- Write to course preferences
2445:
2446: sub writecoursepref {
2447: my ($courseid,%prefs)=@_;
2448: $courseid=~s/^\///;
2449: $courseid=~s/\_/\//g;
2450: my ($cdomain,$cnum)=split(/\//,$courseid);
2451: my $chome=homeserver($cnum,$cdomain);
2452: if (($chome eq '') || ($chome eq 'no_host')) {
2453: return 'error: no such course';
2454: }
2455: my $cstring='';
2456: foreach (keys %prefs) {
2457: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2458: }
2459: $cstring=~s/\&$//;
2460: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2461: }
2462:
2463: # ---------------------------------------------------------- Make/modify course
2464:
2465: sub createcourse {
2466: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2467: $url=&declutter($url);
2468: my $cid='';
2469: unless (&allowed('ccc',$udom)) {
2470: return 'refused';
2471: }
2472: # ------------------------------------------------------------------- Create ID
2473: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2474: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2475: # ----------------------------------------------- Make sure that does not exist
2476: my $uhome=&homeserver($uname,$udom,'true');
2477: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2478: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2479: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2480: $uhome=&homeserver($uname,$udom,'true');
2481: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2482: return 'error: unable to generate unique course-ID';
2483: }
2484: }
2485: # ------------------------------------------------ Check supplied server name
2486: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2487: if (! exists($libserv{$course_server})) {
2488: return 'error:bad server name '.$course_server;
2489: }
2490: # ------------------------------------------------------------- Make the course
2491: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2492: $course_server);
2493: unless ($reply eq 'ok') { return 'error: '.$reply; }
2494: $uhome=&homeserver($uname,$udom,'true');
2495: if (($uhome eq '') || ($uhome eq 'no_host')) {
2496: return 'error: no such course';
2497: }
2498: # ----------------------------------------------------------------- Course made
2499: my $topurl=$url;
2500: unless ($nonstandard) {
2501: # ------------------------------------------ For standard courses, make top url
2502: my $mapurl=&clutter($url);
2503: if ($mapurl eq '/res/') { $mapurl=''; }
2504: $ENV{'form.initmap'}=(<<ENDINITMAP);
2505: <map>
2506: <resource id="1" type="start"></resource>
2507: <resource id="2" src="$mapurl"></resource>
2508: <resource id="3" type="finish"></resource>
2509: <link index="1" from="1" to="2"></link>
2510: <link index="2" from="2" to="3"></link>
2511: </map>
2512: ENDINITMAP
2513: $topurl=&declutter(
2514: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2515: );
2516: }
2517: # ----------------------------------------------------------- Write preferences
2518: &writecoursepref($udom.'_'.$uname,
2519: ('description' => $description,
2520: 'url' => $topurl));
2521: return '/'.$udom.'/'.$uname;
2522: }
2523:
2524: # ---------------------------------------------------------- Assign Custom Role
2525:
2526: sub assigncustomrole {
2527: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2528: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2529: $end,$start);
2530: }
2531:
2532: # ----------------------------------------------------------------- Revoke Role
2533:
2534: sub revokerole {
2535: my ($udom,$uname,$url,$role)=@_;
2536: my $now=time;
2537: return &assignrole($udom,$uname,$url,$role,$now);
2538: }
2539:
2540: # ---------------------------------------------------------- Revoke Custom Role
2541:
2542: sub revokecustomrole {
2543: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2544: my $now=time;
2545: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2546: }
2547:
2548: # ------------------------------------------------------------ Directory lister
2549:
2550: sub dirlist {
2551: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2552:
2553: $uri=~s/^\///;
2554: $uri=~s/\/$//;
2555: my ($udom, $uname);
2556: (undef,$udom,$uname)=split(/\//,$uri);
2557: if(defined($userdomain)) {
2558: $udom = $userdomain;
2559: }
2560: if(defined($username)) {
2561: $uname = $username;
2562: }
2563:
2564: my $dirRoot = $perlvar{'lonDocRoot'};
2565: if(defined($alternateDirectoryRoot)) {
2566: $dirRoot = $alternateDirectoryRoot;
2567: $dirRoot =~ s/\/$//;
2568: }
2569:
2570: if($udom) {
2571: if($uname) {
2572: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2573: homeserver($uname,$udom));
2574: return split(/:/,$listing);
2575: } elsif(!defined($alternateDirectoryRoot)) {
2576: my $tryserver;
2577: my %allusers=();
2578: foreach $tryserver (keys %libserv) {
2579: if($hostdom{$tryserver} eq $udom) {
2580: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2581: $udom, $tryserver);
2582: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2583: && ($listing ne 'con_lost')) {
2584: foreach (split(/:/,$listing)) {
2585: my ($entry,@stat)=split(/&/,$_);
2586: $allusers{$entry}=1;
2587: }
2588: }
2589: }
2590: }
2591: my $alluserstr='';
2592: foreach (sort keys %allusers) {
2593: $alluserstr.=$_.'&user:';
2594: }
2595: $alluserstr=~s/:$//;
2596: return split(/:/,$alluserstr);
2597: } else {
2598: my @emptyResults = ();
2599: push(@emptyResults, 'missing user name');
2600: return split(':',@emptyResults);
2601: }
2602: } elsif(!defined($alternateDirectoryRoot)) {
2603: my $tryserver;
2604: my %alldom=();
2605: foreach $tryserver (keys %libserv) {
2606: $alldom{$hostdom{$tryserver}}=1;
2607: }
2608: my $alldomstr='';
2609: foreach (sort keys %alldom) {
2610: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2611: }
2612: $alldomstr=~s/:$//;
2613: return split(/:/,$alldomstr);
2614: } else {
2615: my @emptyResults = ();
2616: push(@emptyResults, 'missing domain');
2617: return split(':',@emptyResults);
2618: }
2619: }
2620:
2621: # --------------------------------------------- GetFileTimestamp
2622: # This function utilizes dirlist and returns the date stamp for
2623: # when it was last modified. It will also return an error of -1
2624: # if an error occurs
2625:
2626: sub GetFileTimestamp {
2627: my ($studentDomain,$studentName,$filename,$root)=@_;
2628: $studentDomain=~s/\W//g;
2629: $studentName=~s/\W//g;
2630: my $subdir=$studentName.'__';
2631: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
2632: my $proname="$studentDomain/$subdir/$studentName";
2633: $proname .= '/'.$filename;
2634: my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
2635: $root);
2636: my $fileStat = $dir[0];
2637: my @stats = split('&', $fileStat);
2638: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
2639: return $stats[9];
2640: } else {
2641: return -1;
2642: }
2643: }
2644:
2645: # -------------------------------------------------------- Value of a Condition
2646:
2647: sub directcondval {
2648: my $number=shift;
2649: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2650: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2651: } else {
2652: return 2;
2653: }
2654: }
2655:
2656: sub condval {
2657: my $condidx=shift;
2658: my $result=0;
2659: my $allpathcond='';
2660: foreach (split(/\|/,$condidx)) {
2661: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2662: $allpathcond.=
2663: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2664: }
2665: }
2666: $allpathcond=~s/\|$//;
2667: if ($ENV{'request.course.id'}) {
2668: if ($allpathcond) {
2669: my $operand='|';
2670: my @stack;
2671: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2672: if ($_ eq '(') {
2673: push @stack,($operand,$result)
2674: } elsif ($_ eq ')') {
2675: my $before=pop @stack;
2676: if (pop @stack eq '&') {
2677: $result=$result>$before?$before:$result;
2678: } else {
2679: $result=$result>$before?$result:$before;
2680: }
2681: } elsif (($_ eq '&') || ($_ eq '|')) {
2682: $operand=$_;
2683: } else {
2684: my $new=directcondval($_);
2685: if ($operand eq '&') {
2686: $result=$result>$new?$new:$result;
2687: } else {
2688: $result=$result>$new?$result:$new;
2689: }
2690: }
2691: }
2692: }
2693: }
2694: return $result;
2695: }
2696:
2697: # ---------------------------------------------------- Devalidate courseresdata
2698:
2699: sub devalidatecourseresdata {
2700: my ($coursenum,$coursedomain)=@_;
2701: my $hashid=$coursenum.':'.$coursedomain;
2702: delete $courseresdatacache{$hashid.'.time'};
2703: }
2704:
2705: # --------------------------------------------------- Course Resourcedata Query
2706:
2707: sub courseresdata {
2708: my ($coursenum,$coursedomain,@which)=@_;
2709: my $coursehom=&homeserver($coursenum,$coursedomain);
2710: my $hashid=$coursenum.':'.$coursedomain;
2711: my $dodump=0;
2712: if (!defined($courseresdatacache{$hashid.'.time'})) {
2713: $dodump=1;
2714: } else {
2715: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2716: }
2717: if ($dodump) {
2718: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2719: my ($tmp) = keys(%dumpreply);
2720: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2721: $courseresdatacache{$hashid.'.time'}=time;
2722: $courseresdatacache{$hashid}=\%dumpreply;
2723: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
2724: return $tmp;
2725: }
2726: }
2727: foreach my $item (@which) {
2728: if (defined($courseresdatacache{$hashid}->{$item})) {
2729: return $courseresdatacache{$hashid}->{$item};
2730: }
2731: }
2732: return undef;
2733: }
2734:
2735: # --------------------------------------------------------- Value of a Variable
2736:
2737: sub EXT {
2738: my ($varname,$symbparm,$udom,$uname,)=@_;
2739:
2740: unless ($varname) { return ''; }
2741:
2742: #get real user name/domain, courseid and symb
2743: my $courseid;
2744: if (!($uname && $udom)) {
2745: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2746: if (!$symbparm) { $symbparm=$cursymb; }
2747: } else {
2748: $courseid=$ENV{'request.course.id'};
2749: }
2750:
2751: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2752: my $rest;
2753: if ($therest[0]) {
2754: $rest=join('.',@therest);
2755: } else {
2756: $rest='';
2757: }
2758: my $qualifierrest=$qualifier;
2759: if ($rest) { $qualifierrest.='.'.$rest; }
2760: my $spacequalifierrest=$space;
2761: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2762: if ($realm eq 'user') {
2763: # --------------------------------------------------------------- user.resource
2764: if ($space eq 'resource') {
2765: my %restored=&restore(undef,undef,$udom,$uname);
2766: return $restored{$qualifierrest};
2767: # ----------------------------------------------------------------- user.access
2768: } elsif ($space eq 'access') {
2769: # FIXME - not supporting calls for a specific user
2770: return &allowed($qualifier,$rest);
2771: # ------------------------------------------ user.preferences, user.environment
2772: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2773: if (($uname eq $ENV{'user.name'}) &&
2774: ($udom eq $ENV{'user.domain'})) {
2775: return $ENV{join('.',('environment',$qualifierrest))};
2776: } else {
2777: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2778: return $returnhash{$qualifierrest};
2779: }
2780: # ----------------------------------------------------------------- user.course
2781: } elsif ($space eq 'course') {
2782: # FIXME - not supporting calls for a specific user
2783: return $ENV{join('.',('request.course',$qualifier))};
2784: # ------------------------------------------------------------------- user.role
2785: } elsif ($space eq 'role') {
2786: # FIXME - not supporting calls for a specific user
2787: my ($role,$where)=split(/\./,$ENV{'request.role'});
2788: if ($qualifier eq 'value') {
2789: return $role;
2790: } elsif ($qualifier eq 'extent') {
2791: return $where;
2792: }
2793: # ----------------------------------------------------------------- user.domain
2794: } elsif ($space eq 'domain') {
2795: return $udom;
2796: # ------------------------------------------------------------------- user.name
2797: } elsif ($space eq 'name') {
2798: return $uname;
2799: # ---------------------------------------------------- Any other user namespace
2800: } else {
2801: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2802: my %reply=&get($space,[$item]);
2803: return $reply{$item};
2804: }
2805: } elsif ($realm eq 'query') {
2806: # ---------------------------------------------- pull stuff out of query string
2807: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
2808: return $ENV{'form.'.$space};
2809: } elsif ($realm eq 'request') {
2810: # ------------------------------------------------------------- request.browser
2811: if ($space eq 'browser') {
2812: return $ENV{'browser.'.$qualifier};
2813: # ------------------------------------------------------------ request.filename
2814: } else {
2815: return $ENV{'request.'.$spacequalifierrest};
2816: }
2817: } elsif ($realm eq 'course') {
2818: # ---------------------------------------------------------- course.description
2819: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
2820: } elsif ($realm eq 'resource') {
2821:
2822: if ($courseid eq $ENV{'request.course.id'}) {
2823:
2824: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2825:
2826: # ----------------------------------------------------- Cascading lookup scheme
2827: if (!$symbparm) { $symbparm=&symbread(); }
2828: my $symbp=$symbparm;
2829: my $mapp=(split(/\_\_\_/,$symbp))[0];
2830:
2831: my $symbparm=$symbp.'.'.$spacequalifierrest;
2832: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2833:
2834: my $section;
2835: if (($ENV{'user.name'} eq $uname) &&
2836: ($ENV{'user.domain'} eq $udom)) {
2837: $section=$ENV{'request.course.sec'};
2838: } else {
2839: $section=&usection($udom,$uname,$courseid);
2840: }
2841:
2842: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
2843: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
2844: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
2845:
2846: my $courselevel=$courseid.'.'.$spacequalifierrest;
2847: my $courselevelr=$courseid.'.'.$symbparm;
2848: my $courselevelm=$courseid.'.'.$mapparm;
2849:
2850: # ----------------------------------------------------------- first, check user
2851: my %resourcedata=&get('resourcedata',
2852: [$courselevelr,$courselevelm,$courselevel],
2853: $udom,$uname);
2854: my ($tmp)=keys(%resourcedata);
2855: &Apache::lonnet::logthis("Returned $tmp: ".join(':',keys(%resourcedata)));
2856: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
2857:
2858: if ($resourcedata{$courselevelr}) {
2859: return $resourcedata{$courselevelr}; }
2860: if ($resourcedata{$courselevelm}) {
2861: return $resourcedata{$courselevelm}; }
2862: if ($resourcedata{$courselevel}) {
2863: return $resourcedata{$courselevel}; }
2864: } else {
2865: if ($tmp!~/No such file/) {
2866: &logthis("<font color=blue>WARNING:".
2867: " Trying to get resource data for ".
2868: $uname." at ".$udom.": ".
2869: $tmp."</font>");
2870: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
2871: return $tmp;
2872: }
2873: }
2874:
2875: # -------------------------------------------------------- second, check course
2876:
2877: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
2878: $ENV{'course.'.$courseid.'.domain'},
2879: ($seclevelr,$seclevelm,$seclevel,
2880: $courselevelr,$courselevelm,
2881: $courselevel));
2882: if (defined($coursereply)) { return $coursereply; }
2883:
2884: # ------------------------------------------------------ third, check map parms
2885: my %parmhash=();
2886: my $thisparm='';
2887: if (tie(%parmhash,'GDBM_File',
2888: $ENV{'request.course.fn'}.'_parms.db',
2889: &GDBM_READER(),0640)) {
2890: $thisparm=$parmhash{$symbparm};
2891: untie(%parmhash);
2892: }
2893: if ($thisparm) { return $thisparm; }
2894: }
2895: # --------------------------------------------- last, look in resource metadata
2896:
2897: $spacequalifierrest=~s/\./\_/;
2898: my $filename;
2899: if (!$symbparm) { $symbparm=&symbread(); }
2900: if ($symbparm) {
2901: $filename=(split(/\_\_\_/,$symbparm))[2];
2902: } else {
2903: $filename=$ENV{'request.filename'};
2904: }
2905: my $metadata=&metadata($filename,$spacequalifierrest);
2906: if (defined($metadata)) { return $metadata; }
2907: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
2908: if (defined($metadata)) { return $metadata; }
2909:
2910: # ------------------------------------------------------------------ Cascade up
2911: unless ($space eq '0') {
2912: my ($part,$id)=split(/\_/,$space);
2913: if ($id) {
2914: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2915: $symbparm,$udom,$uname);
2916: if (defined($partgeneral)) { return $partgeneral; }
2917: } else {
2918: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2919: $symbparm,$udom,$uname);
2920: if (defined($resourcegeneral)) { return $resourcegeneral; }
2921: }
2922: }
2923:
2924: # ---------------------------------------------------- Any other user namespace
2925: } elsif ($realm eq 'environment') {
2926: # ----------------------------------------------------------------- environment
2927: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
2928: return $ENV{'environment.'.$spacequalifierrest};
2929: } else {
2930: my %returnhash=&userenvironment($udom,$uname,
2931: $spacequalifierrest);
2932: return $returnhash{$spacequalifierrest};
2933: }
2934: } elsif ($realm eq 'system') {
2935: # ----------------------------------------------------------------- system.time
2936: if ($space eq 'time') {
2937: return time;
2938: }
2939: }
2940: return '';
2941: }
2942:
2943: # ---------------------------------------------------------------- Get metadata
2944:
2945: sub metadata {
2946: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2947:
2948: $uri=&declutter($uri);
2949: # if it is a non metadata possible uri return quickly
2950: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
2951: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
2952: return '';
2953: }
2954: my $filename=$uri;
2955: $uri=~s/\.meta$//;
2956: #
2957: # Is the metadata already cached?
2958: # Look at timestamp of caching
2959: # Everything is cached by the main uri, libraries are never directly cached
2960: #
2961: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
2962: #
2963: # Is this a recursive call for a library?
2964: #
2965: if ($liburi) {
2966: $liburi=&declutter($liburi);
2967: $filename=$liburi;
2968: }
2969: my %metathesekeys=();
2970: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2971: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2972: my $parser=HTML::LCParser->new(\$metastring);
2973: my $token;
2974: undef %metathesekeys;
2975: while ($token=$parser->get_token) {
2976: if ($token->[0] eq 'S') {
2977: if (defined($token->[2]->{'package'})) {
2978: #
2979: # This is a package - get package info
2980: #
2981: my $package=$token->[2]->{'package'};
2982: my $keyroot='';
2983: if ($prefix) {
2984: $keyroot.=$prefix;
2985: } else {
2986: if (defined($token->[2]->{'part'})) {
2987: $keyroot.='_'.$token->[2]->{'part'};
2988: }
2989: }
2990: if (defined($token->[2]->{'id'})) {
2991: $keyroot.='_'.$token->[2]->{'id'};
2992: }
2993: if ($metacache{$uri.':packages'}) {
2994: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2995: } else {
2996: $metacache{$uri.':packages'}=$package.$keyroot;
2997: }
2998: foreach (keys %packagetab) {
2999: if ($_=~/^$package\&/) {
3000: my ($pack,$name,$subp)=split(/\&/,$_);
3001: my $value=$packagetab{$_};
3002: my $part=$keyroot;
3003: $part=~s/^\_//;
3004: if ($subp eq 'display') {
3005: $value.=' [Part: '.$part.']';
3006: }
3007: my $unikey='parameter'.$keyroot.'_'.$name;
3008: $metathesekeys{$unikey}=1;
3009: $metacache{$uri.':'.$unikey.'.part'}=$part;
3010: unless
3011: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3012: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3013: }
3014: }
3015: }
3016: } else {
3017: #
3018: # This is not a package - some other kind of start tag
3019: #
3020: my $entry=$token->[1];
3021: my $unikey;
3022: if ($entry eq 'import') {
3023: $unikey='';
3024: } else {
3025: $unikey=$entry;
3026: }
3027: if ($prefix) {
3028: $unikey.=$prefix;
3029: } else {
3030: if (defined($token->[2]->{'part'})) {
3031: $unikey.='_'.$token->[2]->{'part'};
3032: }
3033: }
3034: if (defined($token->[2]->{'id'})) {
3035: $unikey.='_'.$token->[2]->{'id'};
3036: }
3037:
3038: if ($entry eq 'import') {
3039: #
3040: # Importing a library here
3041: #
3042: if ($depthcount<20) {
3043: my $location=$parser->get_text('/import');
3044: my $dir=$filename;
3045: $dir=~s|[^/]*$||;
3046: $location=&filelocation($dir,$location);
3047: foreach (sort(split(/\,/,&metadata($uri,'keys',
3048: $location,$unikey,
3049: $depthcount+1)))) {
3050: $metathesekeys{$_}=1;
3051: }
3052: }
3053: } else {
3054:
3055: if (defined($token->[2]->{'name'})) {
3056: $unikey.='_'.$token->[2]->{'name'};
3057: }
3058: $metathesekeys{$unikey}=1;
3059: foreach (@{$token->[3]}) {
3060: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3061: }
3062: unless (
3063: $metacache{$uri.':'.$unikey}=&HTML::Entities::decode($parser->get_text('/'.$entry))
3064: ) { $metacache{$uri.':'.$unikey}=
3065: $metacache{$uri.':'.$unikey.'.default'};
3066: }
3067: # end of not-a-package not-a-library import
3068: }
3069: # end of not-a-package start tag
3070: }
3071: # the next is the end of "start tag"
3072: }
3073: }
3074: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3075: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3076: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3077: $metacache{$uri.':cachedtimestamp'}=time;
3078: # this is the end of "was not already recently cached
3079: }
3080: return $metacache{$uri.':'.$what};
3081: }
3082:
3083: sub metadata_generate_part0 {
3084: my ($metadata,$metacache,$uri) = @_;
3085: my %allnames;
3086: foreach my $metakey (sort keys %$metadata) {
3087: if ($metakey=~/^parameter\_(.*)/) {
3088: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3089: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3090: if (! exists($$metadata{'parameter_0_'.$name})) {
3091: $allnames{$name}=$part;
3092: }
3093: }
3094: }
3095: foreach my $name (keys(%allnames)) {
3096: $$metadata{"parameter_0_$name"}=1;
3097: my $key="$uri:parameter_0_$name";
3098: $$metacache{"$key.part"}='0';
3099: $$metacache{"$key.name"}=$name;
3100: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3101: $allnames{$name}.'_'.$name.
3102: '.type'};
3103: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3104: '.display'};
3105: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3106: $olddis=~s/$expr/\[Part: 0\]/;
3107: $$metacache{"$key.display"}=$olddis;
3108: }
3109: }
3110:
3111: # ------------------------------------------------- Get the title of a resource
3112:
3113: sub gettitle {
3114: my $urlsymb=shift;
3115: my $symb=&symbread($urlsymb);
3116: unless ($symb) {
3117: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3118: return &metadata($urlsymb,'title');
3119: }
3120: if ($titlecache{$symb}) { return $titlecache{$symb}; }
3121: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3122: my $title='';
3123: my %bighash;
3124: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3125: &GDBM_READER(),0640)) {
3126: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3127: $title=$bighash{'title_'.$mapid.'.'.$resid};
3128: untie %bighash;
3129: }
3130: if ($title) {
3131: $titlecache{$symb}=$title;
3132: return $title;
3133: } else {
3134: return &metadata($urlsymb,'title');
3135: }
3136: }
3137:
3138: # ------------------------------------------------- Update symbolic store links
3139:
3140: sub symblist {
3141: my ($mapname,%newhash)=@_;
3142: $mapname=declutter($mapname);
3143: my %hash;
3144: if (($ENV{'request.course.fn'}) && (%newhash)) {
3145: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3146: &GDBM_WRCREAT(),0640)) {
3147: foreach (keys %newhash) {
3148: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3149: }
3150: if (untie(%hash)) {
3151: return 'ok';
3152: }
3153: }
3154: }
3155: return 'error';
3156: }
3157:
3158: # --------------------------------------------------------------- Verify a symb
3159:
3160: sub symbverify {
3161: my ($symb,$thisfn)=@_;
3162: $thisfn=&declutter($thisfn);
3163: # direct jump to resource in page or to a sequence - will construct own symbs
3164: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3165: # check URL part
3166: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3167: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3168:
3169: $symb=&symbclean($symb);
3170:
3171: my %bighash;
3172: my $okay=0;
3173: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3174: &GDBM_READER(),0640)) {
3175: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3176: unless ($ids) {
3177: $ids=$bighash{'ids_/'.$thisfn};
3178: }
3179: if ($ids) {
3180: # ------------------------------------------------------------------- Has ID(s)
3181: foreach (split(/\,/,$ids)) {
3182: my ($mapid,$resid)=split(/\./,$_);
3183: if (
3184: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3185: eq $symb) {
3186: $okay=1;
3187: }
3188: }
3189: }
3190: untie(%bighash);
3191: }
3192: return $okay;
3193: }
3194:
3195: # --------------------------------------------------------------- Clean-up symb
3196:
3197: sub symbclean {
3198: my $symb=shift;
3199:
3200: # remove version from map
3201: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3202:
3203: # remove version from URL
3204: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3205:
3206: return $symb;
3207: }
3208:
3209: # ------------------------------------------------------ Return symb list entry
3210:
3211: sub symbread {
3212: my ($thisfn,$donotrecurse)=@_;
3213: # no filename provided? try from environment
3214: unless ($thisfn) {
3215: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3216: $thisfn=$ENV{'request.filename'};
3217: }
3218: # is that filename actually a symb? Verify, clean, and return
3219: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3220: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3221: }
3222: $thisfn=declutter($thisfn);
3223: my %hash;
3224: my %bighash;
3225: my $syval='';
3226: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3227: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3228: &GDBM_READER(),0640)) {
3229: $syval=$hash{$thisfn};
3230: untie(%hash);
3231: }
3232: # ---------------------------------------------------------- There was an entry
3233: if ($syval) {
3234: unless ($syval=~/\_\d+$/) {
3235: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3236: &appenv('request.ambiguous' => $thisfn);
3237: return '';
3238: }
3239: $syval.=$1;
3240: }
3241: } else {
3242: # ------------------------------------------------------- Was not in symb table
3243: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3244: &GDBM_READER(),0640)) {
3245: # ---------------------------------------------- Get ID(s) for current resource
3246: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3247: unless ($ids) {
3248: $ids=$bighash{'ids_/'.$thisfn};
3249: }
3250: unless ($ids) {
3251: # alias?
3252: $ids=$bighash{'mapalias_'.$thisfn};
3253: }
3254: if ($ids) {
3255: # ------------------------------------------------------------------- Has ID(s)
3256: my @possibilities=split(/\,/,$ids);
3257: if ($#possibilities==0) {
3258: # ----------------------------------------------- There is only one possibility
3259: my ($mapid,$resid)=split(/\./,$ids);
3260: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3261: } elsif (!$donotrecurse) {
3262: # ------------------------------------------ There is more than one possibility
3263: my $realpossible=0;
3264: foreach (@possibilities) {
3265: my $file=$bighash{'src_'.$_};
3266: if (&allowed('bre',$file)) {
3267: my ($mapid,$resid)=split(/\./,$_);
3268: if ($bighash{'map_type_'.$mapid} ne 'page') {
3269: $realpossible++;
3270: $syval=declutter($bighash{'map_id_'.$mapid}).
3271: '___'.$resid;
3272: }
3273: }
3274: }
3275: if ($realpossible!=1) { $syval=''; }
3276: } else {
3277: $syval='';
3278: }
3279: }
3280: untie(%bighash)
3281: }
3282: }
3283: if ($syval) {
3284: return &symbclean($syval.'___'.$thisfn);
3285: }
3286: }
3287: &appenv('request.ambiguous' => $thisfn);
3288: return '';
3289: }
3290:
3291: # ---------------------------------------------------------- Return random seed
3292:
3293: sub numval {
3294: my $txt=shift;
3295: $txt=~tr/A-J/0-9/;
3296: $txt=~tr/a-j/0-9/;
3297: $txt=~tr/K-T/0-9/;
3298: $txt=~tr/k-t/0-9/;
3299: $txt=~tr/U-Z/0-5/;
3300: $txt=~tr/u-z/0-5/;
3301: $txt=~s/\D//g;
3302: return int($txt);
3303: }
3304:
3305: sub rndseed {
3306: my ($symb,$courseid,$domain,$username)=@_;
3307: if (!$symb) {
3308: unless ($symb=&symbread()) { return time; }
3309: }
3310: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3311: if (!$domain) {$domain=$ENV{'user.domain'};}
3312: if (!$username) {$username=$ENV{'user.name'};}
3313: {
3314: use integer;
3315: my $symbchck=unpack("%32C*",$symb) << 27;
3316: my $symbseed=numval($symb) << 22;
3317: my $namechck=unpack("%32C*",$username) << 17;
3318: my $nameseed=numval($username) << 12;
3319: my $domainseed=unpack("%32C*",$domain) << 7;
3320: my $courseseed=unpack("%32C*",$courseid);
3321: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3322: #uncommenting these lines can break things!
3323: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3324: #&Apache::lonxml::debug("rndseed :$num:$symb");
3325: return $num;
3326: }
3327: }
3328:
3329: sub ireceipt {
3330: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3331: my $cuname=unpack("%32C*",$funame);
3332: my $cudom=unpack("%32C*",$fudom);
3333: my $cucourseid=unpack("%32C*",$fucourseid);
3334: my $cusymb=unpack("%32C*",$fusymb);
3335: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3336: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3337: ($cunique%$cuname+
3338: $cunique%$cudom+
3339: $cusymb%$cuname+
3340: $cusymb%$cudom+
3341: $cucourseid%$cuname+
3342: $cucourseid%$cudom);
3343: }
3344:
3345: sub receipt {
3346: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3347: return &ireceipt($name,$domain,$courseid,$symb);
3348: }
3349:
3350: # ------------------------------------------------------------ Serves up a file
3351: # returns either the contents of the file or a -1
3352: sub getfile {
3353: my $file=shift;
3354: if ($file=~/^\/*uploaded\//) { # user file
3355: my $ua=new LWP::UserAgent;
3356: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3357: my $response=$ua->request($request);
3358: if ($response->is_success()) {
3359: return $response->content;
3360: } else {
3361: return -1;
3362: }
3363: } else { # normal file from res space
3364: &repcopy($file);
3365: if (! -e $file ) { return -1; };
3366: my $fh=Apache::File->new($file);
3367: my $a='';
3368: while (<$fh>) { $a .=$_; }
3369: return $a;
3370: }
3371: }
3372:
3373: sub filelocation {
3374: my ($dir,$file) = @_;
3375: my $location;
3376: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3377: if ($file=~m:^/~:) { # is a contruction space reference
3378: $location = $file;
3379: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3380: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3381: $location=$file;
3382: } else {
3383: $file=~s/^$perlvar{'lonDocRoot'}//;
3384: $file=~s:^/*res::;
3385: if ( !( $file =~ m:^/:) ) {
3386: $location = $dir. '/'.$file;
3387: } else {
3388: $location = '/home/httpd/html/res'.$file;
3389: }
3390: }
3391: $location=~s://+:/:g; # remove duplicate /
3392: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3393: return $location;
3394: }
3395:
3396: sub hreflocation {
3397: my ($dir,$file)=@_;
3398: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3399: my $finalpath=filelocation($dir,$file);
3400: $finalpath=~s/^\/home\/httpd\/html//;
3401: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3402: return $finalpath;
3403: } else {
3404: return $file;
3405: }
3406: }
3407:
3408: # ------------------------------------------------------------- Declutters URLs
3409:
3410: sub declutter {
3411: my $thisfn=shift;
3412: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3413: $thisfn=~s/^\///;
3414: $thisfn=~s/^res\///;
3415: $thisfn=~s/\?.+$//;
3416: return $thisfn;
3417: }
3418:
3419: # ------------------------------------------------------------- Clutter up URLs
3420:
3421: sub clutter {
3422: my $thisfn='/'.&declutter(shift);
3423: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3424: $thisfn='/res'.$thisfn;
3425: }
3426: return $thisfn;
3427: }
3428:
3429: # -------------------------------------------------------- Escape Special Chars
3430:
3431: sub escape {
3432: my $str=shift;
3433: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3434: return $str;
3435: }
3436:
3437: # ----------------------------------------------------- Un-Escape Special Chars
3438:
3439: sub unescape {
3440: my $str=shift;
3441: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3442: return $str;
3443: }
3444:
3445: # ================================================================ Main Program
3446:
3447: sub goodbye {
3448: &logthis("Starting Shut down");
3449: &flushcourselogs();
3450: &logthis("Shutting down");
3451: }
3452:
3453: BEGIN {
3454: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3455: unless ($readit) {
3456: {
3457: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3458:
3459: while (my $configline=<$config>) {
3460: if ($configline =~ /^[^\#]*PerlSetVar/) {
3461: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3462: chomp($varvalue);
3463: $perlvar{$varname}=$varvalue;
3464: }
3465: }
3466: }
3467: {
3468: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3469:
3470: while (my $configline=<$config>) {
3471: if ($configline =~ /^[^\#]*PerlSetVar/) {
3472: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3473: chomp($varvalue);
3474: $perlvar{$varname}=$varvalue;
3475: }
3476: }
3477: }
3478:
3479: # ------------------------------------------------------------- Read hosts file
3480: {
3481: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3482:
3483: while (my $configline=<$config>) {
3484: next if ($configline =~ /^(\#|\s*$)/);
3485: chomp($configline);
3486: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3487: if ($id && $domain && $role && $name && $ip) {
3488: $hostname{$id}=$name;
3489: $hostdom{$id}=$domain;
3490: $hostip{$id}=$ip;
3491: $iphost{$ip}=$id;
3492: if ($domdescr) { $domaindescription{$domain}=$domdescr; }
3493: if ($role eq 'library') { $libserv{$id}=$name; }
3494: } else {
3495: if ($configline) {
3496: &logthis("Skipping hosts.tab line -$configline-");
3497: }
3498: }
3499: }
3500: }
3501:
3502: # ------------------------------------------------------ Read spare server file
3503: {
3504: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3505:
3506: while (my $configline=<$config>) {
3507: chomp($configline);
3508: if ($configline) {
3509: $spareid{$configline}=1;
3510: }
3511: }
3512: }
3513: # ------------------------------------------------------------ Read permissions
3514: {
3515: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3516:
3517: while (my $configline=<$config>) {
3518: chomp($configline);
3519: if ($configline) {
3520: my ($role,$perm)=split(/ /,$configline);
3521: if ($perm ne '') { $pr{$role}=$perm; }
3522: }
3523: }
3524: }
3525:
3526: # -------------------------------------------- Read plain texts for permissions
3527: {
3528: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3529:
3530: while (my $configline=<$config>) {
3531: chomp($configline);
3532: if ($configline) {
3533: my ($short,$plain)=split(/:/,$configline);
3534: if ($plain ne '') { $prp{$short}=$plain; }
3535: }
3536: }
3537: }
3538:
3539: # ---------------------------------------------------------- Read package table
3540: {
3541: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3542:
3543: while (my $configline=<$config>) {
3544: chomp($configline);
3545: my ($short,$plain)=split(/:/,$configline);
3546: my ($pack,$name)=split(/\&/,$short);
3547: if ($plain ne '') {
3548: $packagetab{$pack.'&'.$name.'&name'}=$name;
3549: $packagetab{$short}=$plain;
3550: }
3551: }
3552: }
3553:
3554: %metacache=();
3555:
3556: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
3557: $dumpcount=0;
3558:
3559: &logtouch();
3560: &logthis('<font color=yellow>INFO: Read configuration</font>');
3561: $readit=1;
3562: }
3563: }
3564:
3565: 1;
3566: __END__
3567:
3568: =pod
3569:
3570: =head1 NAME
3571:
3572: Apache::lonnet - Subroutines to ask questions about things in the network.
3573:
3574: =head1 SYNOPSIS
3575:
3576: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3577:
3578: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3579:
3580: Common parameters:
3581:
3582: =over 4
3583:
3584: =item *
3585:
3586: $uname : an internal username (if $cname expecting a course Id specifically)
3587:
3588: =item *
3589:
3590: $udom : a domain (if $cdom expecting a course's domain specifically)
3591:
3592: =item *
3593:
3594: $symb : a resource instance identifier
3595:
3596: =item *
3597:
3598: $namespace : the name of a .db file that contains the data needed or
3599: being set.
3600:
3601: =back
3602:
3603: =head1 INTRODUCTION
3604:
3605: This module provides subroutines which interact with the
3606: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3607: - classes
3608: - users
3609: - resources
3610:
3611: For many of these objects you can also use this to store data about
3612: them or modify them in various ways.
3613:
3614: This is part of the LearningOnline Network with CAPA project
3615: described at http://www.lon-capa.org.
3616:
3617: =head1 RETURN MESSAGES
3618:
3619: =over 4
3620:
3621: =item *
3622:
3623: con_lost : unable to contact remote host
3624:
3625: =item *
3626:
3627: con_delayed : unable to contact remote host, message will be delivered
3628: when the connection is brought back up
3629:
3630: =item *
3631:
3632: con_failed : unable to contact remote host and unable to save message
3633: for later delivery
3634:
3635: =item *
3636:
3637: error: : an error a occured, a description of the error follows the :
3638:
3639: =item *
3640:
3641: no_such_host : unable to fund a host associated with the user/domain
3642: that was requested
3643:
3644: =back
3645:
3646: =head1 PUBLIC SUBROUTINES
3647:
3648: =head2 Session Environment Functions
3649:
3650: =over 4
3651:
3652: =item *
3653:
3654: appenv(%hash) : the value of %hash is written to the user envirnoment
3655: file, and will be restored for each access this user makes during this
3656: session, also modifies the %ENV for the current process
3657:
3658: =item *
3659:
3660: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3661:
3662: =back
3663:
3664: =head2 User Information
3665:
3666: =over 4
3667:
3668: =item *
3669:
3670: queryauthenticate($uname,$udom) : try to determine user's current
3671: authentication scheme
3672:
3673: =item *
3674:
3675: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3676: servers (first use the current one), $upass should be the users password
3677:
3678: =item *
3679:
3680: homeserver($uname,$udom) : find the server which has the user's
3681: directory and files (there must be only one), this caches the answer,
3682: and also caches if there is a borken connection.
3683:
3684: =item *
3685:
3686: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3687: unique resource in a domain, there must be only 1 ID per username, and
3688: only 1 username per ID in a specific domain) (returns hash:
3689: id=>name,id=>name)
3690:
3691: =item *
3692:
3693: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3694: name=>id,name=>id)
3695:
3696: =item *
3697:
3698: idput($udom,%ids) : store away a list of names and associated IDs
3699:
3700: =item *
3701:
3702: rolesinit($udom,$username,$authhost) : get user privileges
3703:
3704: =item *
3705:
3706: usection($udom,$uname,$cname) : finds the section of student in the
3707: course $cname, return section name/number or '' for "not in course"
3708: and '-1' for "no section"
3709:
3710: =item *
3711:
3712: userenvironment($udom,$uname,@what) : gets the values of the keys
3713: passed in @what from the requested user's environment, returns a hash
3714:
3715: =back
3716:
3717: =head2 User Roles
3718:
3719: =over 4
3720:
3721: =item *
3722:
3723: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
3724: actions
3725: F: full access
3726: U,I,K: authentication modes (cxx only)
3727: '': forbidden
3728: 1: user needs to choose course
3729: 2: browse allowed
3730:
3731: =item *
3732:
3733: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
3734: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
3735: and course level
3736:
3737: =item *
3738:
3739: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
3740: explanation of a user role term
3741:
3742: =back
3743:
3744: =head2 User Modification
3745:
3746: =over 4
3747:
3748: =item *
3749:
3750: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
3751: user for the level given by URL. Optional start and end dates (leave empty
3752: string or zero for "no date")
3753:
3754: =item *
3755:
3756: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
3757: change a users, password, possible return values are: ok,
3758: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
3759: refused
3760:
3761: =item *
3762:
3763: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
3764:
3765: =item *
3766:
3767: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
3768: modify user
3769:
3770: =item *
3771:
3772: modifystudent
3773:
3774: modify a students enrollment and identification information.
3775: The course id is resolved based on the current users environment.
3776: This means the envoking user must be a course coordinator or otherwise
3777: associated with a course.
3778:
3779: This call is essentially a wrapper for lonnet::modifyuser and
3780: lonnet::modify_student_enrollment
3781:
3782: Inputs:
3783:
3784: =over 4
3785:
3786: =item B<$udom> Students loncapa domain
3787:
3788: =item B<$uname> Students loncapa login name
3789:
3790: =item B<$uid> Students id/student number
3791:
3792: =item B<$umode> Students authentication mode
3793:
3794: =item B<$upass> Students password
3795:
3796: =item B<$first> Students first name
3797:
3798: =item B<$middle> Students middle name
3799:
3800: =item B<$last> Students last name
3801:
3802: =item B<$gene> Students generation
3803:
3804: =item B<$usec> Students section in course
3805:
3806: =item B<$end> Unix time of the roles expiration
3807:
3808: =item B<$start> Unix time of the roles start date
3809:
3810: =item B<$forceid> If defined, allow $uid to be changed
3811:
3812: =item B<$desiredhome> server to use as home server for student
3813:
3814: =back
3815:
3816: =item *
3817:
3818: modify_student_enrollment
3819:
3820: Change a students enrollment status in a class. The environment variable
3821: 'role.request.course' must be defined for this function to proceed.
3822:
3823: Inputs:
3824:
3825: =over 4
3826:
3827: =item $udom, students domain
3828:
3829: =item $uname, students name
3830:
3831: =item $uid, students user id
3832:
3833: =item $first, students first name
3834:
3835: =item $middle
3836:
3837: =item $last
3838:
3839: =item $gene
3840:
3841: =item $usec
3842:
3843: =item $end
3844:
3845: =item $start
3846:
3847: =back
3848:
3849:
3850: =item *
3851:
3852: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
3853: custom role; give a custom role to a user for the level given by URL. Specify
3854: name and domain of role author, and role name
3855:
3856: =item *
3857:
3858: revokerole($udom,$uname,$url,$role) : revoke a role for url
3859:
3860: =item *
3861:
3862: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
3863:
3864: =back
3865:
3866: =head2 Course Infomation
3867:
3868: =over 4
3869:
3870: =item *
3871:
3872: coursedescription($courseid) : course description
3873:
3874: =item *
3875:
3876: courseresdata($coursenum,$coursedomain,@which) : request for current
3877: parameter setting for a specific course, @what should be a list of
3878: parameters to ask about. This routine caches answers for 5 minutes.
3879:
3880: =back
3881:
3882: =head2 Course Modification
3883:
3884: =over 4
3885:
3886: =item *
3887:
3888: writecoursepref($courseid,%prefs) : write preferences (environment
3889: database) for a course
3890:
3891: =item *
3892:
3893: createcourse($udom,$description,$url) : make/modify course
3894:
3895: =back
3896:
3897: =head2 Resource Subroutines
3898:
3899: =over 4
3900:
3901: =item *
3902:
3903: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
3904:
3905: =item *
3906:
3907: repcopy($filename) : subscribes to the requested file, and attempts to
3908: replicate from the owning library server, Might return
3909: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
3910: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
3911: resource. Expects the local filesystem pathname
3912: (/home/httpd/html/res/....)
3913:
3914: =back
3915:
3916: =head2 Resource Information
3917:
3918: =over 4
3919:
3920: =item *
3921:
3922: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
3923: a vairety of different possible values, $varname should be a request
3924: string, and the other parameters can be used to specify who and what
3925: one is asking about.
3926:
3927: Possible values for $varname are environment.lastname (or other item
3928: from the envirnment hash), user.name (or someother aspect about the
3929: user), resource.0.maxtries (or some other part and parameter of a
3930: resource)
3931:
3932: =item *
3933:
3934: directcondval($number) : get current value of a condition; reads from a state
3935: string
3936:
3937: =item *
3938:
3939: condval($condidx) : value of condition index based on state
3940:
3941: =item *
3942:
3943: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
3944: resource's metadata, $what should be either a specific key, or either
3945: 'keys' (to get a list of possible keys) or 'packages' to get a list of
3946: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
3947:
3948: this function automatically caches all requests
3949:
3950: =item *
3951:
3952: metadata_query($query,$custom,$customshow) : make a metadata query against the
3953: network of library servers; returns file handle of where SQL and regex results
3954: will be stored for query
3955:
3956: =item *
3957:
3958: symbread($filename) : return symbolic list entry (filename argument optional);
3959: returns the data handle
3960:
3961: =item *
3962:
3963: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
3964: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
3965: failure, user must be in a course, as it assumes the existance of the
3966: course initi hash, and uses $ENV('request.course.id'}
3967:
3968:
3969: =item *
3970:
3971: symbclean($symb) : removes versions numbers from a symb, returns the
3972: cleaned symb
3973:
3974: =item *
3975:
3976: is_on_map($uri) : checks if the $uri is somewhere on the current
3977: course map, user must be in a course for it to work.
3978:
3979: =item *
3980:
3981: numval($salt) : return random seed value (addend for rndseed)
3982:
3983: =item *
3984:
3985: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
3986: a random seed, all arguments are optional, if they aren't sent it uses the
3987: environment to derive them. Note: if symb isn't sent and it can't get one
3988: from &symbread it will use the current time as its return value
3989:
3990: =item *
3991:
3992: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
3993: unfakeable, receipt
3994:
3995: =item *
3996:
3997: receipt() : API to ireceipt working off of ENV values; given out to users
3998:
3999: =item *
4000:
4001: countacc($url) : count the number of accesses to a given URL
4002:
4003: =item *
4004:
4005: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4006:
4007: =item *
4008:
4009: checkin($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 $tcrsid)
4010:
4011: =item *
4012:
4013: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4014:
4015: =item *
4016:
4017: devalidate($symb) : devalidate temporary spreadsheet calculations,
4018: forcing spreadsheet to reevaluate the resource scores next time.
4019:
4020: =back
4021:
4022: =head2 Storing/Retreiving Data
4023:
4024: =over 4
4025:
4026: =item *
4027:
4028: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4029: for this url; hashref needs to be given and should be a \%hashname; the
4030: remaining args aren't required and if they aren't passed or are '' they will
4031: be derived from the ENV
4032:
4033: =item *
4034:
4035: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4036: uses critical subroutine
4037:
4038: =item *
4039:
4040: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4041: all args are optional
4042:
4043: =item *
4044:
4045: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4046: works very similar to store/cstore, but all data is stored in a
4047: temporary location and can be reset using tmpreset, $storehash should
4048: be a hash reference, returns nothing on success
4049:
4050: =item *
4051:
4052: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4053: similar to restore, but all data is stored in a temporary location and
4054: can be reset using tmpreset. Returns a hash of values on success,
4055: error string otherwise.
4056:
4057: =item *
4058:
4059: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4060: deltes all keys for $symb form the temporary storage hash.
4061:
4062: =item *
4063:
4064: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4065: reference filled in from namesp ($udom and $uname are optional)
4066:
4067: =item *
4068:
4069: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4070: namesp ($udom and $uname are optional)
4071:
4072: =item *
4073:
4074: dump($namespace,$udom,$uname,$regexp) :
4075: dumps the complete (or key matching regexp) namespace into a hash
4076: ($udom, $uname and $regexp are optional)
4077:
4078: =item *
4079:
4080: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4081: ($udom and $uname are optional)
4082:
4083: =item *
4084:
4085: cput($namespace,$storehash,$udom,$uname) : critical put
4086: ($udom and $uname are optional)
4087:
4088: =item *
4089:
4090: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4091: reference filled in from namesp (encrypts the return communication)
4092: ($udom and $uname are optional)
4093:
4094: =item *
4095:
4096: log($udom,$name,$home,$message) : write to permanent log for user; use
4097: critical subroutine
4098:
4099: =back
4100:
4101: =head2 Network Status Functions
4102:
4103: =over 4
4104:
4105: =item *
4106:
4107: dirlist($uri) : return directory list based on URI
4108:
4109: =item *
4110:
4111: spareserver() : find server with least workload from spare.tab
4112:
4113: =back
4114:
4115: =head2 Apache Request
4116:
4117: =over 4
4118:
4119: =item *
4120:
4121: ssi($url,%hash) : server side include, does a complete request cycle on url to
4122: localhost, posts hash
4123:
4124: =back
4125:
4126: =head2 Data to String to Data
4127:
4128: =over 4
4129:
4130: =item *
4131:
4132: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4133: and '&' separators, supports elements that are arrayrefs and hashrefs
4134:
4135: =item *
4136:
4137: hashref2str($hashref) : convert a hashref into a string complete with
4138: escaping and '=' and '&' separators, supports elements that are
4139: arrayrefs and hashrefs
4140:
4141: =item *
4142:
4143: arrayref2str($arrayref) : convert an arrayref into a string complete
4144: with escaping and '&' separators, supports elements that are arrayrefs
4145: and hashrefs
4146:
4147: =item *
4148:
4149: str2hash($string) : convert string to hash using unescaping and
4150: splitting on '=' and '&', supports elements that are arrayrefs and
4151: hashrefs
4152:
4153: =item *
4154:
4155: str2array($string) : convert string to hash using unescaping and
4156: splitting on '&', supports elements that are arrayrefs and hashrefs
4157:
4158: =back
4159:
4160: =head2 Logging Routines
4161:
4162: =over 4
4163:
4164: These routines allow one to make log messages in the lonnet.log and
4165: lonnet.perm logfiles.
4166:
4167: =item *
4168:
4169: logtouch() : make sure the logfile, lonnet.log, exists
4170:
4171: =item *
4172:
4173: logthis() : append message to the normal lonnet.log file, it gets
4174: preiodically rolled over and deleted.
4175:
4176: =item *
4177:
4178: logperm() : append a permanent message to lonnet.perm.log, this log
4179: file never gets deleted by any automated portion of the system, only
4180: messages of critical importance should go in here.
4181:
4182: =back
4183:
4184: =head2 General File Helper Routines
4185:
4186: =over 4
4187:
4188: =item *
4189:
4190: getfile($file) : returns the entire contents of a file or -1; it
4191: properly subscribes to and replicates the file if neccessary.
4192:
4193: =item *
4194:
4195: filelocation($dir,$file) : returns file system location of a file
4196: based on URI; meant to be "fairly clean" absolute reference, $dir is a
4197: directory that relative $file lookups are to looked in ($dir of /a/dir
4198: and a file of ../bob will become /a/bob)
4199:
4200: =item *
4201:
4202: hreflocation($dir,$file) : returns file system location or a URL; same as
4203: filelocation except for hrefs
4204:
4205: =item *
4206:
4207: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
4208:
4209: =back
4210:
4211: =head2 HTTP Helper Routines
4212:
4213: =over 4
4214:
4215: =item *
4216:
4217: escape() : unpack non-word characters into CGI-compatible hex codes
4218:
4219: =item *
4220:
4221: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
4222:
4223: =back
4224:
4225: =head1 PRIVATE SUBROUTINES
4226:
4227: =head2 Underlying communication routines (Shouldn't call)
4228:
4229: =over 4
4230:
4231: =item *
4232:
4233: subreply() : tries to pass a message to lonc, returns con_lost if incapable
4234:
4235: =item *
4236:
4237: reply() : uses subreply to send a message to remote machine, logs all failures
4238:
4239: =item *
4240:
4241: critical() : passes a critical message to another server; if cannot
4242: get through then place message in connection buffer directory and
4243: returns con_delayed, if incapable of saving message, returns
4244: con_failed
4245:
4246: =item *
4247:
4248: reconlonc() : tries to reconnect lonc client processes.
4249:
4250: =back
4251:
4252: =head2 Resource Access Logging
4253:
4254: =over 4
4255:
4256: =item *
4257:
4258: flushcourselogs() : flush (save) buffer logs and access logs
4259:
4260: =item *
4261:
4262: courselog($what) : save message for course in hash
4263:
4264: =item *
4265:
4266: courseacclog($what) : save message for course using &courselog(). Perform
4267: special processing for specific resource types (problems, exams, quizzes, etc).
4268:
4269: =item *
4270:
4271: goodbye() : flush course logs and log shutting down; it is called in srm.conf
4272: as a PerlChildExitHandler
4273:
4274: =back
4275:
4276: =head2 Other
4277:
4278: =over 4
4279:
4280: =item *
4281:
4282: symblist($mapname,%newhash) : update symbolic storage links
4283:
4284: =back
4285:
4286: =cut
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