File:
[LON-CAPA] /
loncom /
lonnet /
perl /
lonnet.pm
Revision
1.319:
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Wed Jan 15 19:34:03 2003 UTC (21 years, 6 months ago) by
matthew
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MAIN
CVS tags:
HEAD
Rename dumpcurrent to currentdump
lond: fixed 1D10T bug in code. $value was used instead of $v (version).
lonspreadsheet: now call lonnet::currentdump, removed debugging code and
code that was commented out.
lonnet:renamed dumpcurrent to currentdump. currentdump will now deal
transparently with old lond's that do not support currentdump.
1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.319 2003/01/15 19:34:03 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 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
84: %domaindescription);
85: use IO::Socket;
86: use GDBM_File;
87: use Apache::Constants qw(:common :http);
88: use HTML::LCParser;
89: use Fcntl qw(:flock);
90: use Apache::loncoursedata;
91:
92: my $readit;
93:
94: # --------------------------------------------------------------------- Logging
95:
96: sub logtouch {
97: my $execdir=$perlvar{'lonDaemons'};
98: unless (-e "$execdir/logs/lonnet.log") {
99: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
100: close $fh;
101: }
102: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
103: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
104: }
105:
106: sub logthis {
107: my $message=shift;
108: my $execdir=$perlvar{'lonDaemons'};
109: my $now=time;
110: my $local=localtime($now);
111: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
112: print $fh "$local ($$): $message\n";
113: return 1;
114: }
115:
116: sub logperm {
117: my $message=shift;
118: my $execdir=$perlvar{'lonDaemons'};
119: my $now=time;
120: my $local=localtime($now);
121: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
122: print $fh "$now:$message:$local\n";
123: return 1;
124: }
125:
126: # -------------------------------------------------- Non-critical communication
127: sub subreply {
128: my ($cmd,$server)=@_;
129: my $peerfile="$perlvar{'lonSockDir'}/$server";
130: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
131: Type => SOCK_STREAM,
132: Timeout => 10)
133: or return "con_lost";
134: print $client "$cmd\n";
135: my $answer=<$client>;
136: if (!$answer) { $answer="con_lost"; }
137: chomp($answer);
138: return $answer;
139: }
140:
141: sub reply {
142: my ($cmd,$server)=@_;
143: unless (defined($hostname{$server})) { return 'no_such_host'; }
144: my $answer=subreply($cmd,$server);
145: if ($answer eq 'con_lost') {
146: #sleep 5;
147: #$answer=subreply($cmd,$server);
148: #if ($answer eq 'con_lost') {
149: # &logthis("Second attempt con_lost on $server");
150: # my $peerfile="$perlvar{'lonSockDir'}/$server";
151: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
152: # Type => SOCK_STREAM,
153: # Timeout => 10)
154: # or return "con_lost";
155: # &logthis("Killing socket");
156: # print $client "close_connection_exit\n";
157: #sleep 5;
158: # $answer=subreply($cmd,$server);
159: #}
160: }
161: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
162: &logthis("<font color=blue>WARNING:".
163: " $cmd to $server returned $answer</font>");
164: }
165: return $answer;
166: }
167:
168: # ----------------------------------------------------------- Send USR1 to lonc
169:
170: sub reconlonc {
171: my $peerfile=shift;
172: &logthis("Trying to reconnect for $peerfile");
173: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
174: if (my $fh=Apache::File->new("$loncfile")) {
175: my $loncpid=<$fh>;
176: chomp($loncpid);
177: if (kill 0 => $loncpid) {
178: &logthis("lonc at pid $loncpid responding, sending USR1");
179: kill USR1 => $loncpid;
180: sleep 1;
181: if (-e "$peerfile") { return; }
182: &logthis("$peerfile still not there, give it another try");
183: sleep 5;
184: if (-e "$peerfile") { return; }
185: &logthis(
186: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
187: } else {
188: &logthis(
189: "<font color=blue>WARNING:".
190: " lonc at pid $loncpid not responding, giving up</font>");
191: }
192: } else {
193: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
194: }
195: }
196:
197: # ------------------------------------------------------ Critical communication
198:
199: sub critical {
200: my ($cmd,$server)=@_;
201: unless ($hostname{$server}) {
202: &logthis("<font color=blue>WARNING:".
203: " Critical message to unknown server ($server)</font>");
204: return 'no_such_host';
205: }
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 $fname=shift;
732: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
733: my $author=$fname;
734: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
735: my ($udom,$uname)=split(/\//,$author);
736: my $home=homeserver($uname,$udom);
737: if ($home eq 'no_host') {
738: return 'not_found';
739: }
740: my $answer=reply("sub:$fname",$home);
741: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
742: $answer.=' by '.$home;
743: }
744: return $answer;
745: }
746:
747: # -------------------------------------------------------------- Replicate file
748:
749: sub repcopy {
750: my $filename=shift;
751: $filename=~s/\/+/\//g;
752: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
753: my $transname="$filename.in.transfer";
754: if ((-e $filename) || (-e $transname)) { return OK; }
755: my $remoteurl=subscribe($filename);
756: if ($remoteurl =~ /^con_lost by/) {
757: &logthis("Subscribe returned $remoteurl: $filename");
758: return HTTP_SERVICE_UNAVAILABLE;
759: } elsif ($remoteurl eq 'not_found') {
760: &logthis("Subscribe returned not_found: $filename");
761: return HTTP_NOT_FOUND;
762: } elsif ($remoteurl =~ /^rejected by/) {
763: &logthis("Subscribe returned $remoteurl: $filename");
764: return FORBIDDEN;
765: } elsif ($remoteurl eq 'directory') {
766: return OK;
767: } else {
768: my $author=$filename;
769: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
770: my ($udom,$uname)=split(/\//,$author);
771: my $home=homeserver($uname,$udom);
772: unless ($home eq $perlvar{'lonHostID'}) {
773: my @parts=split(/\//,$filename);
774: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
775: if ($path ne "$perlvar{'lonDocRoot'}/res") {
776: &logthis("Malconfiguration for replication: $filename");
777: return HTTP_BAD_REQUEST;
778: }
779: my $count;
780: for ($count=5;$count<$#parts;$count++) {
781: $path.="/$parts[$count]";
782: if ((-e $path)!=1) {
783: mkdir($path,0777);
784: }
785: }
786: my $ua=new LWP::UserAgent;
787: my $request=new HTTP::Request('GET',"$remoteurl");
788: my $response=$ua->request($request,$transname);
789: if ($response->is_error()) {
790: unlink($transname);
791: my $message=$response->status_line;
792: &logthis("<font color=blue>WARNING:"
793: ." LWP get: $message: $filename</font>");
794: return HTTP_SERVICE_UNAVAILABLE;
795: } else {
796: if ($remoteurl!~/\.meta$/) {
797: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
798: my $mresponse=$ua->request($mrequest,$filename.'.meta');
799: if ($mresponse->is_error()) {
800: unlink($filename.'.meta');
801: &logthis(
802: "<font color=yellow>INFO: No metadata: $filename</font>");
803: }
804: }
805: rename($transname,$filename);
806: return OK;
807: }
808: }
809: }
810: }
811:
812: # --------------------------------------------------------- Server Side Include
813:
814: sub ssi {
815:
816: my ($fn,%form)=@_;
817:
818: my $ua=new LWP::UserAgent;
819:
820: my $request;
821:
822: if (%form) {
823: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
824: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
825: } else {
826: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
827: }
828:
829: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
830: my $response=$ua->request($request);
831:
832: return $response->content;
833: }
834:
835: # ------- Add a token to a remote URI's query string to vouch for access rights
836:
837: sub tokenwrapper {
838: my $uri=shift;
839: $uri=~s/^http\:\/\/([^\/]+)//;
840: $uri=~s/^\///;
841: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
842: my $token=$1;
843: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
844: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
845: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
846: (($uri=~/\?/)?'&':'?').'token='.$token.
847: '&tokenissued='.$perlvar{'lonHostID'};
848: } else {
849: return '/adm/notfound.html';
850: }
851: }
852:
853: # --------------- Take an uploaded file and put it into the userfiles directory
854: # input: name of form element, coursedoc=1 means this is for the course
855: # output: url of file in userspace
856:
857: sub userfileupload {
858: my ($formname,$coursedoc)=@_;
859: my $fname=$ENV{'form.'.$formname.'.filename'};
860: # Replace Windows backslashes by forward slashes
861: $fname=~s/\\/\//g;
862: # Get rid of everything but the actual filename
863: $fname=~s/^.*\/([^\/]+)$/$1/;
864: # Replace spaces by underscores
865: $fname=~s/\s+/\_/g;
866: # Replace all other weird characters by nothing
867: $fname=~s/[^\w\.\-]//g;
868: # See if there is anything left
869: unless ($fname) { return 'error: no uploaded file'; }
870: chop($ENV{'form.'.$formname});
871: # Create the directory if not present
872: my $docuname='';
873: my $docudom='';
874: my $docuhome='';
875: if ($coursedoc) {
876: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
877: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
878: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
879: } else {
880: $docuname=$ENV{'user.name'};
881: $docudom=$ENV{'user.domain'};
882: $docuhome=$ENV{'user.home'};
883: }
884: return
885: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
886: }
887:
888: sub finishuserfileupload {
889: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
890: my $path=$docudom.'/'.$docuname.'/';
891: my $filepath=$perlvar{'lonDocRoot'};
892: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
893: my $count;
894: for ($count=4;$count<=$#parts;$count++) {
895: $filepath.="/$parts[$count]";
896: if ((-e $filepath)!=1) {
897: mkdir($filepath,0777);
898: }
899: }
900: # Save the file
901: {
902: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
903: print $fh $ENV{'form.'.$formname};
904: }
905: # Notify homeserver to grep it
906: #
907:
908: my $fetchresult=
909: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
910: if ($fetchresult eq 'ok') {
911: #
912: # Return the URL to it
913: return '/uploaded/'.$path.$fname;
914: } else {
915: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
916: ' to host '.$docuhome.': '.$fetchresult);
917: return '/adm/notfound.html';
918: }
919: }
920:
921: # ------------------------------------------------------------------------- Log
922:
923: sub log {
924: my ($dom,$nam,$hom,$what)=@_;
925: return critical("log:$dom:$nam:$what",$hom);
926: }
927:
928: # ------------------------------------------------------------------ Course Log
929:
930: sub flushcourselogs {
931: &logthis('Flushing course log buffers');
932: foreach (keys %courselogs) {
933: my $crsid=$_;
934: if (&reply('log:'.$coursedombuf{$crsid}.':'.
935: &escape($courselogs{$crsid}),
936: $coursehombuf{$crsid}) eq 'ok') {
937: delete $courselogs{$crsid};
938: } else {
939: &logthis('Failed to flush log buffer for '.$crsid);
940: if (length($courselogs{$crsid})>40000) {
941: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
942: " exceeded maximum size, deleting.</font>");
943: delete $courselogs{$crsid};
944: }
945: }
946: }
947: &logthis('Flushing access logs');
948: foreach (keys %accesshash) {
949: my $entry=$_;
950: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
951: my %temphash=($entry => $accesshash{$entry});
952: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
953: delete $accesshash{$entry};
954: }
955: }
956: $dumpcount++;
957: }
958:
959: sub courselog {
960: my $what=shift;
961: $what=time.':'.$what;
962: unless ($ENV{'request.course.id'}) { return ''; }
963: $coursedombuf{$ENV{'request.course.id'}}=
964: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
965: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
966: $coursehombuf{$ENV{'request.course.id'}}=
967: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
968: if (defined $courselogs{$ENV{'request.course.id'}}) {
969: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
970: } else {
971: $courselogs{$ENV{'request.course.id'}}.=$what;
972: }
973: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
974: &flushcourselogs();
975: }
976: }
977:
978: sub courseacclog {
979: my $fnsymb=shift;
980: unless ($ENV{'request.course.id'}) { return ''; }
981: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
982: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
983: $what.=':POST';
984: foreach (keys %ENV) {
985: if ($_=~/^form\.(.*)/) {
986: $what.=':'.$1.'='.$ENV{$_};
987: }
988: }
989: }
990: &courselog($what);
991: }
992:
993: sub countacc {
994: my $url=&declutter(shift);
995: unless ($ENV{'request.course.id'}) { return ''; }
996: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
997: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
998: if (defined($accesshash{$key})) {
999: $accesshash{$key}++;
1000: } else {
1001: $accesshash{$key}=1;
1002: }
1003: }
1004:
1005: # ----------------------------------------------------------- Check out an item
1006:
1007: sub checkout {
1008: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1009: my $now=time;
1010: my $lonhost=$perlvar{'lonHostID'};
1011: my $infostr=&escape(
1012: 'CHECKOUTTOKEN&'.
1013: $tuname.'&'.
1014: $tudom.'&'.
1015: $tcrsid.'&'.
1016: $symb.'&'.
1017: $now.'&'.$ENV{'REMOTE_ADDR'});
1018: my $token=&reply('tmpput:'.$infostr,$lonhost);
1019: if ($token=~/^error\:/) {
1020: &logthis("<font color=blue>WARNING: ".
1021: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1022: "</font>");
1023: return '';
1024: }
1025:
1026: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1027: $token=~tr/a-z/A-Z/;
1028:
1029: my %infohash=('resource.0.outtoken' => $token,
1030: 'resource.0.checkouttime' => $now,
1031: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1032:
1033: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1034: return '';
1035: } else {
1036: &logthis("<font color=blue>WARNING: ".
1037: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1038: "</font>");
1039: }
1040:
1041: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1042: &escape('Checkout '.$infostr.' - '.
1043: $token)) ne 'ok') {
1044: return '';
1045: } else {
1046: &logthis("<font color=blue>WARNING: ".
1047: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1048: "</font>");
1049: }
1050: return $token;
1051: }
1052:
1053: # ------------------------------------------------------------ Check in an item
1054:
1055: sub checkin {
1056: my $token=shift;
1057: my $now=time;
1058: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1059: $lonhost=~tr/A-Z/a-z/;
1060: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1061: $dtoken=~s/\W/\_/g;
1062: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1063: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1064:
1065: unless (($tuname) && ($tudom)) {
1066: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1067: return '';
1068: }
1069:
1070: unless (&allowed('mgr',$tcrsid)) {
1071: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1072: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1073: return '';
1074: }
1075:
1076: my %infohash=('resource.0.intoken' => $token,
1077: 'resource.0.checkintime' => $now,
1078: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1079:
1080: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1081: return '';
1082: }
1083:
1084: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1085: &escape('Checkin - '.$token)) ne 'ok') {
1086: return '';
1087: }
1088:
1089: return ($symb,$tuname,$tudom,$tcrsid);
1090: }
1091:
1092: # --------------------------------------------- Set Expire Date for Spreadsheet
1093:
1094: sub expirespread {
1095: my ($uname,$udom,$stype,$usymb)=@_;
1096: my $cid=$ENV{'request.course.id'};
1097: if ($cid) {
1098: my $now=time;
1099: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1100: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1101: $ENV{'course.'.$cid.'.num'}.
1102: ':nohist_expirationdates:'.
1103: &escape($key).'='.$now,
1104: $ENV{'course.'.$cid.'.home'})
1105: }
1106: return 'ok';
1107: }
1108:
1109: # ----------------------------------------------------- Devalidate Spreadsheets
1110:
1111: sub devalidate {
1112: my $symb=shift;
1113: my $cid=$ENV{'request.course.id'};
1114: if ($cid) {
1115: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
1116: my $status=
1117: &del('nohist_calculatedsheets',
1118: [$key.'studentcalc'],
1119: $ENV{'course.'.$cid.'.domain'},
1120: $ENV{'course.'.$cid.'.num'})
1121: .' '.
1122: &del('nohist_calculatedsheets_'.$cid,
1123: [$key.'assesscalc:'.$symb]);
1124: unless ($status eq 'ok ok') {
1125: &logthis('Could not devalidate spreadsheet '.
1126: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
1127: $symb.': '.$status);
1128: }
1129: }
1130: }
1131:
1132: sub get_scalar {
1133: my ($string,$end) = @_;
1134: my $value;
1135: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1136: $value = $1;
1137: } elsif ($$string =~ s/^([^&]*?)&//) {
1138: $value = $1;
1139: }
1140: return &unescape($value);
1141: }
1142:
1143: sub array2str {
1144: my (@array) = @_;
1145: my $result=&arrayref2str(\@array);
1146: $result=~s/^__ARRAY_REF__//;
1147: $result=~s/__END_ARRAY_REF__$//;
1148: return $result;
1149: }
1150:
1151: sub arrayref2str {
1152: my ($arrayref) = @_;
1153: my $result='__ARRAY_REF__';
1154: foreach my $elem (@$arrayref) {
1155: if(ref($elem) eq 'ARRAY') {
1156: $result.=&arrayref2str($elem).'&';
1157: } elsif(ref($elem) eq 'HASH') {
1158: $result.=&hashref2str($elem).'&';
1159: } elsif(ref($elem)) {
1160: #print("Got a ref of ".(ref($elem))." skipping.");
1161: } else {
1162: $result.=&escape($elem).'&';
1163: }
1164: }
1165: $result=~s/\&$//;
1166: $result .= '__END_ARRAY_REF__';
1167: return $result;
1168: }
1169:
1170: sub hash2str {
1171: my (%hash) = @_;
1172: my $result=&hashref2str(\%hash);
1173: $result=~s/^__HASH_REF__//;
1174: $result=~s/__END_HASH_REF__$//;
1175: return $result;
1176: }
1177:
1178: sub hashref2str {
1179: my ($hashref)=@_;
1180: my $result='__HASH_REF__';
1181: foreach (keys(%$hashref)) {
1182: if (ref($_) eq 'ARRAY') {
1183: $result.=&arrayref2str($_).'=';
1184: } elsif (ref($_) eq 'HASH') {
1185: $result.=&hashref2str($_).'=';
1186: } elsif (ref($_)) {
1187: $result.='=';
1188: #print("Got a ref of ".(ref($_))." skipping.");
1189: } else {
1190: if ($_) {$result.=&escape($_).'=';} else { last; }
1191: }
1192:
1193: if(ref($hashref->{$_}) eq 'ARRAY') {
1194: $result.=&arrayref2str($hashref->{$_}).'&';
1195: } elsif(ref($hashref->{$_}) eq 'HASH') {
1196: $result.=&hashref2str($hashref->{$_}).'&';
1197: } elsif(ref($hashref->{$_})) {
1198: $result.='&';
1199: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1200: } else {
1201: $result.=&escape($hashref->{$_}).'&';
1202: }
1203: }
1204: $result=~s/\&$//;
1205: $result .= '__END_HASH_REF__';
1206: return $result;
1207: }
1208:
1209: sub str2hash {
1210: my ($string)=@_;
1211: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1212: return %$hash;
1213: }
1214:
1215: sub str2hashref {
1216: my ($string) = @_;
1217:
1218: my %hash;
1219:
1220: if($string !~ /^__HASH_REF__/) {
1221: if (! ($string eq '' || !defined($string))) {
1222: $hash{'error'}='Not hash reference';
1223: }
1224: return (\%hash, $string);
1225: }
1226:
1227: $string =~ s/^__HASH_REF__//;
1228:
1229: while($string !~ /^__END_HASH_REF__/) {
1230: #key
1231: my $key='';
1232: if($string =~ /^__HASH_REF__/) {
1233: ($key, $string)=&str2hashref($string);
1234: if(defined($key->{'error'})) {
1235: $hash{'error'}='Bad data';
1236: return (\%hash, $string);
1237: }
1238: } elsif($string =~ /^__ARRAY_REF__/) {
1239: ($key, $string)=&str2arrayref($string);
1240: if($key->[0] eq 'Array reference error') {
1241: $hash{'error'}='Bad data';
1242: return (\%hash, $string);
1243: }
1244: } else {
1245: $string =~ s/^(.*?)=//;
1246: $key=&unescape($1);
1247: }
1248: $string =~ s/^=//;
1249:
1250: #value
1251: my $value='';
1252: if($string =~ /^__HASH_REF__/) {
1253: ($value, $string)=&str2hashref($string);
1254: if(defined($value->{'error'})) {
1255: $hash{'error'}='Bad data';
1256: return (\%hash, $string);
1257: }
1258: } elsif($string =~ /^__ARRAY_REF__/) {
1259: ($value, $string)=&str2arrayref($string);
1260: if($value->[0] eq 'Array reference error') {
1261: $hash{'error'}='Bad data';
1262: return (\%hash, $string);
1263: }
1264: } else {
1265: $value=&get_scalar(\$string,'__END_HASH_REF__');
1266: }
1267: $string =~ s/^&//;
1268:
1269: $hash{$key}=$value;
1270: }
1271:
1272: $string =~ s/^__END_HASH_REF__//;
1273:
1274: return (\%hash, $string);
1275: }
1276:
1277: sub str2array {
1278: my ($string)=@_;
1279: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1280: return @$array;
1281: }
1282:
1283: sub str2arrayref {
1284: my ($string) = @_;
1285: my @array;
1286:
1287: if($string !~ /^__ARRAY_REF__/) {
1288: if (! ($string eq '' || !defined($string))) {
1289: $array[0]='Array reference error';
1290: }
1291: return (\@array, $string);
1292: }
1293:
1294: $string =~ s/^__ARRAY_REF__//;
1295:
1296: while($string !~ /^__END_ARRAY_REF__/) {
1297: my $value='';
1298: if($string =~ /^__HASH_REF__/) {
1299: ($value, $string)=&str2hashref($string);
1300: if(defined($value->{'error'})) {
1301: $array[0] ='Array reference error';
1302: return (\@array, $string);
1303: }
1304: } elsif($string =~ /^__ARRAY_REF__/) {
1305: ($value, $string)=&str2arrayref($string);
1306: if($value->[0] eq 'Array reference error') {
1307: $array[0] ='Array reference error';
1308: return (\@array, $string);
1309: }
1310: } else {
1311: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1312: }
1313: $string =~ s/^&//;
1314:
1315: push(@array, $value);
1316: }
1317:
1318: $string =~ s/^__END_ARRAY_REF__//;
1319:
1320: return (\@array, $string);
1321: }
1322:
1323: # -------------------------------------------------------------------Temp Store
1324:
1325: sub tmpreset {
1326: my ($symb,$namespace,$domain,$stuname) = @_;
1327: if (!$symb) {
1328: $symb=&symbread();
1329: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1330: }
1331: $symb=escape($symb);
1332:
1333: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1334: $namespace=~s/\//\_/g;
1335: $namespace=~s/\W//g;
1336:
1337: #FIXME needs to do something for /pub resources
1338: if (!$domain) { $domain=$ENV{'user.domain'}; }
1339: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1340: my $path=$perlvar{'lonDaemons'}.'/tmp';
1341: my %hash;
1342: if (tie(%hash,'GDBM_File',
1343: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1344: &GDBM_WRCREAT(),0640)) {
1345: foreach my $key (keys %hash) {
1346: if ($key=~ /:$symb/) {
1347: delete($hash{$key});
1348: }
1349: }
1350: }
1351: }
1352:
1353: sub tmpstore {
1354: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1355:
1356: if (!$symb) {
1357: $symb=&symbread();
1358: if (!$symb) { $symb= $ENV{'request.url'}; }
1359: }
1360: $symb=escape($symb);
1361:
1362: if (!$namespace) {
1363: # I don't think we would ever want to store this for a course.
1364: # it seems this will only be used if we don't have a course.
1365: #$namespace=$ENV{'request.course.id'};
1366: #if (!$namespace) {
1367: $namespace=$ENV{'request.state'};
1368: #}
1369: }
1370: $namespace=~s/\//\_/g;
1371: $namespace=~s/\W//g;
1372: #FIXME needs to do something for /pub resources
1373: if (!$domain) { $domain=$ENV{'user.domain'}; }
1374: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1375: my $now=time;
1376: my %hash;
1377: my $path=$perlvar{'lonDaemons'}.'/tmp';
1378: if (tie(%hash,'GDBM_File',
1379: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1380: &GDBM_WRCREAT(),0640)) {
1381: $hash{"version:$symb"}++;
1382: my $version=$hash{"version:$symb"};
1383: my $allkeys='';
1384: foreach my $key (keys(%$storehash)) {
1385: $allkeys.=$key.':';
1386: $hash{"$version:$symb:$key"}=$$storehash{$key};
1387: }
1388: $hash{"$version:$symb:timestamp"}=$now;
1389: $allkeys.='timestamp';
1390: $hash{"$version:keys:$symb"}=$allkeys;
1391: if (untie(%hash)) {
1392: return 'ok';
1393: } else {
1394: return "error:$!";
1395: }
1396: } else {
1397: return "error:$!";
1398: }
1399: }
1400:
1401: # -----------------------------------------------------------------Temp Restore
1402:
1403: sub tmprestore {
1404: my ($symb,$namespace,$domain,$stuname) = @_;
1405:
1406: if (!$symb) {
1407: $symb=&symbread();
1408: if (!$symb) { $symb= $ENV{'request.url'}; }
1409: }
1410: $symb=escape($symb);
1411:
1412: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1413: #FIXME needs to do something for /pub resources
1414: if (!$domain) { $domain=$ENV{'user.domain'}; }
1415: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1416:
1417: my %returnhash;
1418: $namespace=~s/\//\_/g;
1419: $namespace=~s/\W//g;
1420: my %hash;
1421: my $path=$perlvar{'lonDaemons'}.'/tmp';
1422: if (tie(%hash,'GDBM_File',
1423: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1424: &GDBM_READER(),0640)) {
1425: my $version=$hash{"version:$symb"};
1426: $returnhash{'version'}=$version;
1427: my $scope;
1428: for ($scope=1;$scope<=$version;$scope++) {
1429: my $vkeys=$hash{"$scope:keys:$symb"};
1430: my @keys=split(/:/,$vkeys);
1431: my $key;
1432: $returnhash{"$scope:keys"}=$vkeys;
1433: foreach $key (@keys) {
1434: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1435: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1436: }
1437: }
1438: if (!(untie(%hash))) {
1439: return "error:$!";
1440: }
1441: } else {
1442: return "error:$!";
1443: }
1444: return %returnhash;
1445: }
1446:
1447: # ----------------------------------------------------------------------- Store
1448:
1449: sub store {
1450: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1451: my $home='';
1452:
1453: if ($stuname) { $home=&homeserver($stuname,$domain); }
1454:
1455: $symb=&symbclean($symb);
1456: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1457:
1458: &devalidate($symb);
1459:
1460: $symb=escape($symb);
1461: if (!$namespace) {
1462: unless ($namespace=$ENV{'request.course.id'}) {
1463: return '';
1464: }
1465: }
1466: if (!$domain) { $domain=$ENV{'user.domain'}; }
1467: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1468: if (!$home) { $home=$ENV{'user.home'}; }
1469: my $namevalue='';
1470: foreach (keys %$storehash) {
1471: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1472: }
1473: $namevalue=~s/\&$//;
1474: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1475: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1476: }
1477:
1478: # -------------------------------------------------------------- Critical Store
1479:
1480: sub cstore {
1481: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1482: my $home='';
1483:
1484: if ($stuname) { $home=&homeserver($stuname,$domain); }
1485:
1486: $symb=&symbclean($symb);
1487: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1488:
1489: &devalidate($symb);
1490:
1491: $symb=escape($symb);
1492: if (!$namespace) {
1493: unless ($namespace=$ENV{'request.course.id'}) {
1494: return '';
1495: }
1496: }
1497: if (!$domain) { $domain=$ENV{'user.domain'}; }
1498: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1499: if (!$home) { $home=$ENV{'user.home'}; }
1500:
1501: my $namevalue='';
1502: foreach (keys %$storehash) {
1503: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1504: }
1505: $namevalue=~s/\&$//;
1506: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1507: return critical
1508: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1509: }
1510:
1511: # --------------------------------------------------------------------- Restore
1512:
1513: sub restore {
1514: my ($symb,$namespace,$domain,$stuname) = @_;
1515: my $home='';
1516:
1517: if ($stuname) { $home=&homeserver($stuname,$domain); }
1518:
1519: if (!$symb) {
1520: unless ($symb=escape(&symbread())) { return ''; }
1521: } else {
1522: $symb=&escape(&symbclean($symb));
1523: }
1524: if (!$namespace) {
1525: unless ($namespace=$ENV{'request.course.id'}) {
1526: return '';
1527: }
1528: }
1529: if (!$domain) { $domain=$ENV{'user.domain'}; }
1530: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1531: if (!$home) { $home=$ENV{'user.home'}; }
1532: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1533:
1534: my %returnhash=();
1535: foreach (split(/\&/,$answer)) {
1536: my ($name,$value)=split(/\=/,$_);
1537: $returnhash{&unescape($name)}=&unescape($value);
1538: }
1539: my $version;
1540: for ($version=1;$version<=$returnhash{'version'};$version++) {
1541: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1542: $returnhash{$_}=$returnhash{$version.':'.$_};
1543: }
1544: }
1545: return %returnhash;
1546: }
1547:
1548: # ---------------------------------------------------------- Course Description
1549:
1550: sub coursedescription {
1551: my $courseid=shift;
1552: $courseid=~s/^\///;
1553: $courseid=~s/\_/\//g;
1554: my ($cdomain,$cnum)=split(/\//,$courseid);
1555: my $chome=&homeserver($cnum,$cdomain);
1556: my $normalid=$cdomain.'_'.$cnum;
1557: # need to always cache even if we get errors otherwise we keep
1558: # trying and trying and trying to get the course description.
1559: my %envhash=();
1560: my %returnhash=();
1561: $envhash{'course.'.$normalid.'.last_cache'}=time;
1562: if ($chome ne 'no_host') {
1563: %returnhash=&dump('environment',$cdomain,$cnum);
1564: if (!exists($returnhash{'con_lost'})) {
1565: $returnhash{'home'}= $chome;
1566: $returnhash{'domain'} = $cdomain;
1567: $returnhash{'num'} = $cnum;
1568: while (my ($name,$value) = each %returnhash) {
1569: $envhash{'course.'.$normalid.'.'.$name}=$value;
1570: }
1571: $returnhash{'url'}=&clutter($returnhash{'url'});
1572: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1573: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1574: $envhash{'course.'.$normalid.'.home'}=$chome;
1575: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1576: $envhash{'course.'.$normalid.'.num'}=$cnum;
1577: }
1578: }
1579: &appenv(%envhash);
1580: return %returnhash;
1581: }
1582:
1583: # -------------------------------------------------------- Get user privileges
1584:
1585: sub rolesinit {
1586: my ($domain,$username,$authhost)=@_;
1587: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1588: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1589: my %allroles=();
1590: my %thesepriv=();
1591: my $now=time;
1592: my $userroles="user.login.time=$now\n";
1593: my $thesestr;
1594:
1595: if ($rolesdump ne '') {
1596: foreach (split(/&/,$rolesdump)) {
1597: if ($_!~/^rolesdef\&/) {
1598: my ($area,$role)=split(/=/,$_);
1599: $area=~s/\_\w\w$//;
1600: my ($trole,$tend,$tstart)=split(/_/,$role);
1601: $userroles.='user.role.'.$trole.'.'.$area.'='.
1602: $tstart.'.'.$tend."\n";
1603: if ($tend!=0) {
1604: if ($tend<$now) {
1605: $trole='';
1606: }
1607: }
1608: if ($tstart!=0) {
1609: if ($tstart>$now) {
1610: $trole='';
1611: }
1612: }
1613: if (($area ne '') && ($trole ne '')) {
1614: my $spec=$trole.'.'.$area;
1615: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1616: if ($trole =~ /^cr\//) {
1617: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1618: my $homsvr=homeserver($rauthor,$rdomain);
1619: if ($hostname{$homsvr} ne '') {
1620: my $roledef=
1621: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1622: $homsvr);
1623: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1624: my ($syspriv,$dompriv,$coursepriv)=
1625: split(/\_/,unescape($roledef));
1626: $allroles{'cm./'}.=':'.$syspriv;
1627: $allroles{$spec.'./'}.=':'.$syspriv;
1628: if ($tdomain ne '') {
1629: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1630: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1631: if ($trest ne '') {
1632: $allroles{'cm.'.$area}.=':'.$coursepriv;
1633: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1634: }
1635: }
1636: }
1637: }
1638: } else {
1639: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1640: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1641: if ($tdomain ne '') {
1642: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1643: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1644: if ($trest ne '') {
1645: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1646: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1647: }
1648: }
1649: }
1650: }
1651: }
1652: }
1653: my $adv=0;
1654: my $author=0;
1655: foreach (keys %allroles) {
1656: %thesepriv=();
1657: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1658: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1659: foreach (split(/:/,$allroles{$_})) {
1660: if ($_ ne '') {
1661: my ($privilege,$restrictions)=split(/&/,$_);
1662: if ($restrictions eq '') {
1663: $thesepriv{$privilege}='F';
1664: } else {
1665: if ($thesepriv{$privilege} ne 'F') {
1666: $thesepriv{$privilege}.=$restrictions;
1667: }
1668: }
1669: }
1670: }
1671: $thesestr='';
1672: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1673: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1674: }
1675: $userroles.='user.adv='.$adv."\n".
1676: 'user.author='.$author."\n";
1677: $ENV{'user.adv'}=$adv;
1678: }
1679: return $userroles;
1680: }
1681:
1682: # --------------------------------------------------------------- get interface
1683:
1684: sub get {
1685: my ($namespace,$storearr,$udomain,$uname)=@_;
1686: my $items='';
1687: foreach (@$storearr) {
1688: $items.=escape($_).'&';
1689: }
1690: $items=~s/\&$//;
1691: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1692: if (!$uname) { $uname=$ENV{'user.name'}; }
1693: my $uhome=&homeserver($uname,$udomain);
1694:
1695: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1696: my @pairs=split(/\&/,$rep);
1697: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1698: return @pairs;
1699: }
1700: my %returnhash=();
1701: my $i=0;
1702: foreach (@$storearr) {
1703: $returnhash{$_}=unescape($pairs[$i]);
1704: $i++;
1705: }
1706: return %returnhash;
1707: }
1708:
1709: # --------------------------------------------------------------- del interface
1710:
1711: sub del {
1712: my ($namespace,$storearr,$udomain,$uname)=@_;
1713: my $items='';
1714: foreach (@$storearr) {
1715: $items.=escape($_).'&';
1716: }
1717: $items=~s/\&$//;
1718: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1719: if (!$uname) { $uname=$ENV{'user.name'}; }
1720: my $uhome=&homeserver($uname,$udomain);
1721:
1722: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1723: }
1724:
1725: # -------------------------------------------------------------- dump interface
1726:
1727: sub dump {
1728: my ($namespace,$udomain,$uname,$regexp)=@_;
1729: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1730: if (!$uname) { $uname=$ENV{'user.name'}; }
1731: my $uhome=&homeserver($uname,$udomain);
1732: if ($regexp) {
1733: $regexp=&escape($regexp);
1734: } else {
1735: $regexp='.';
1736: }
1737: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1738: my @pairs=split(/\&/,$rep);
1739: my %returnhash=();
1740: foreach (@pairs) {
1741: my ($key,$value)=split(/=/,$_);
1742: $returnhash{unescape($key)}=unescape($value);
1743: }
1744: return %returnhash;
1745: }
1746:
1747: # --------------------------------------------------------------- currentdump
1748: sub currentdump {
1749: my ($namespace,$udomain,$uname)=@_;
1750: if (!$udomain) { $udomain = $ENV{'user.domain'}; }
1751: if (!$uname) { $uname = $ENV{'user.name'}; }
1752: my $uhome = &homeserver($uname,$udomain);
1753: my $rep=reply("currentdump:$udomain:$uname:$namespace",$uhome);
1754: return if ($rep =~ /^(error:|no_such_host)/);
1755: #
1756: my %returnhash=();
1757: #
1758: if ($rep eq "unknown_cmd") {
1759: # an old lond will not know currentdump
1760: # Do a dump and make it look like a currentdump
1761: my @tmp = &dump($namespace,$udomain,$uname,'.');
1762: return if ($tmp[0] =~ /^(error:|no_such_host)/);
1763: my %hash = @tmp;
1764: @tmp=();
1765: # Code ripped from lond, essentially. The only difference
1766: # here is the unescaping done by lonnet::dump(). Conceivably
1767: # we might run in to problems with parameter names =~ /^v\./
1768: while (my ($key,$value) = each(%hash)) {
1769: my ($v,$symb,$param) = split(/:/,$key);
1770: next if ($v eq 'version' || $symb eq 'keys');
1771: next if (exists($returnhash{$symb}) &&
1772: exists($returnhash{$symb}->{$param}) &&
1773: $returnhash{$symb}->{'v.'.$param} > $v);
1774: $returnhash{$symb}->{$param}=$value;
1775: $returnhash{$symb}->{'v.'.$param}=$v;
1776: }
1777: #
1778: # Remove all of the keys in the hashes which keep track of
1779: # the version of the parameter.
1780: while (my ($symb,$param_hash) = each(%returnhash)) {
1781: # use a foreach because we are going to delete from the hash.
1782: foreach my $key (keys(%$param_hash)) {
1783: delete($param_hash->{$key}) if ($key =~ /^v\./);
1784: }
1785: }
1786: } else {
1787: my @pairs=split(/\&/,$rep);
1788: foreach (@pairs) {
1789: my ($key,$value)=split(/=/,$_);
1790: my ($symb,$param) = split(/:/,$key);
1791: $returnhash{&unescape($symb)}->{&unescape($param)} =
1792: &unescape($value);
1793: }
1794: }
1795: return %returnhash;
1796: }
1797:
1798: # --------------------------------------------------------------- put interface
1799:
1800: sub put {
1801: my ($namespace,$storehash,$udomain,$uname)=@_;
1802: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1803: if (!$uname) { $uname=$ENV{'user.name'}; }
1804: my $uhome=&homeserver($uname,$udomain);
1805: my $items='';
1806: foreach (keys %$storehash) {
1807: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1808: }
1809: $items=~s/\&$//;
1810: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1811: }
1812:
1813: # ------------------------------------------------------ critical put interface
1814:
1815: sub cput {
1816: my ($namespace,$storehash,$udomain,$uname)=@_;
1817: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1818: if (!$uname) { $uname=$ENV{'user.name'}; }
1819: my $uhome=&homeserver($uname,$udomain);
1820: my $items='';
1821: foreach (keys %$storehash) {
1822: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1823: }
1824: $items=~s/\&$//;
1825: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1826: }
1827:
1828: # -------------------------------------------------------------- eget interface
1829:
1830: sub eget {
1831: my ($namespace,$storearr,$udomain,$uname)=@_;
1832: my $items='';
1833: foreach (@$storearr) {
1834: $items.=escape($_).'&';
1835: }
1836: $items=~s/\&$//;
1837: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1838: if (!$uname) { $uname=$ENV{'user.name'}; }
1839: my $uhome=&homeserver($uname,$udomain);
1840: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1841: my @pairs=split(/\&/,$rep);
1842: my %returnhash=();
1843: my $i=0;
1844: foreach (@$storearr) {
1845: $returnhash{$_}=unescape($pairs[$i]);
1846: $i++;
1847: }
1848: return %returnhash;
1849: }
1850:
1851: # ------------------------------------------------- Check for a user privilege
1852:
1853: sub allowed {
1854: my ($priv,$uri)=@_;
1855:
1856: my $orguri=$uri;
1857: $uri=&declutter($uri);
1858:
1859: # Free bre access to adm and meta resources
1860:
1861: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1862: return 'F';
1863: }
1864:
1865: # Free bre to public access
1866:
1867: if ($priv eq 'bre') {
1868: my $copyright=&metadata($uri,'copyright');
1869: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
1870: return 'F';
1871: }
1872: if ($copyright eq 'priv') {
1873: $uri=~/([^\/]+)\/([^\/]+)\//;
1874: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
1875: return '';
1876: }
1877: }
1878: if ($copyright eq 'domain') {
1879: $uri=~/([^\/]+)\/([^\/]+)\//;
1880: unless (($ENV{'user.domain'} eq $1) ||
1881: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
1882: return '';
1883: }
1884: }
1885: if ($ENV{'request.role'}=~ /li\.\//) {
1886: # Library role, so allow browsing of resources in this domain.
1887: return 'F';
1888: }
1889: }
1890: # Domain coordinator is trying to create a course
1891: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
1892: # uri is the requested domain in this case.
1893: # comparison to 'request.role.domain' shows if the user has selected
1894: # a role of dc for the domain in question.
1895: return 'F' if ($uri eq $ENV{'request.role.domain'});
1896: }
1897:
1898: my $thisallowed='';
1899: my $statecond=0;
1900: my $courseprivid='';
1901:
1902: # Course
1903:
1904: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1905: $thisallowed.=$1;
1906: }
1907:
1908: # Domain
1909:
1910: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1911: =~/$priv\&([^\:]*)/) {
1912: $thisallowed.=$1;
1913: }
1914:
1915: # Course: uri itself is a course
1916: my $courseuri=$uri;
1917: $courseuri=~s/\_(\d)/\/$1/;
1918: $courseuri=~s/^([^\/])/\/$1/;
1919:
1920: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1921: =~/$priv\&([^\:]*)/) {
1922: $thisallowed.=$1;
1923: }
1924:
1925: # URI is an uploaded document for this course
1926:
1927: if (($priv eq 'bre') &&
1928: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
1929: return 'F';
1930: }
1931: # Full access at system, domain or course-wide level? Exit.
1932:
1933: if ($thisallowed=~/F/) {
1934: return 'F';
1935: }
1936:
1937: # If this is generating or modifying users, exit with special codes
1938:
1939: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1940: return $thisallowed;
1941: }
1942: #
1943: # Gathered so far: system, domain and course wide privileges
1944: #
1945: # Course: See if uri or referer is an individual resource that is part of
1946: # the course
1947:
1948: if ($ENV{'request.course.id'}) {
1949:
1950: $courseprivid=$ENV{'request.course.id'};
1951: if ($ENV{'request.course.sec'}) {
1952: $courseprivid.='/'.$ENV{'request.course.sec'};
1953: }
1954: $courseprivid=~s/\_/\//;
1955: my $checkreferer=1;
1956: my ($match,$cond)=&is_on_map($uri);
1957: if ($match) {
1958: $statecond=$cond;
1959: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1960: =~/$priv\&([^\:]*)/) {
1961: $thisallowed.=$1;
1962: $checkreferer=0;
1963: }
1964: }
1965:
1966: if ($checkreferer) {
1967: my $refuri=$ENV{'httpref.'.$orguri};
1968: unless ($refuri) {
1969: foreach (keys %ENV) {
1970: if ($_=~/^httpref\..*\*/) {
1971: my $pattern=$_;
1972: $pattern=~s/^httpref\.\/res\///;
1973: $pattern=~s/\*/\[\^\/\]\+/g;
1974: $pattern=~s/\//\\\//g;
1975: if ($orguri=~/$pattern/) {
1976: $refuri=$ENV{$_};
1977: }
1978: }
1979: }
1980: }
1981:
1982: if ($refuri) {
1983: $refuri=&declutter($refuri);
1984: my ($match,$cond)=&is_on_map($refuri);
1985: if ($match) {
1986: my $refstatecond=$cond;
1987: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1988: =~/$priv\&([^\:]*)/) {
1989: $thisallowed.=$1;
1990: $uri=$refuri;
1991: $statecond=$refstatecond;
1992: }
1993: }
1994: }
1995: }
1996: }
1997:
1998: #
1999: # Gathered now: all privileges that could apply, and condition number
2000: #
2001: #
2002: # Full or no access?
2003: #
2004:
2005: if ($thisallowed=~/F/) {
2006: return 'F';
2007: }
2008:
2009: unless ($thisallowed) {
2010: return '';
2011: }
2012:
2013: # Restrictions exist, deal with them
2014: #
2015: # C:according to course preferences
2016: # R:according to resource settings
2017: # L:unless locked
2018: # X:according to user session state
2019: #
2020:
2021: # Possibly locked functionality, check all courses
2022: # Locks might take effect only after 10 minutes cache expiration for other
2023: # courses, and 2 minutes for current course
2024:
2025: my $envkey;
2026: if ($thisallowed=~/L/) {
2027: foreach $envkey (keys %ENV) {
2028: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2029: my $courseid=$2;
2030: my $roleid=$1.'.'.$2;
2031: $courseid=~s/^\///;
2032: my $expiretime=600;
2033: if ($ENV{'request.role'} eq $roleid) {
2034: $expiretime=120;
2035: }
2036: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2037: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2038: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2039: &coursedescription($courseid);
2040: }
2041: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2042: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2043: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2044: &log($ENV{'user.domain'},$ENV{'user.name'},
2045: $ENV{'user.home'},
2046: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2047: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2048: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2049: return '';
2050: }
2051: }
2052: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2053: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2054: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2055: &log($ENV{'user.domain'},$ENV{'user.name'},
2056: $ENV{'user.home'},
2057: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2058: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2059: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2060: return '';
2061: }
2062: }
2063: }
2064: }
2065: }
2066:
2067: #
2068: # Rest of the restrictions depend on selected course
2069: #
2070:
2071: unless ($ENV{'request.course.id'}) {
2072: return '1';
2073: }
2074:
2075: #
2076: # Now user is definitely in a course
2077: #
2078:
2079:
2080: # Course preferences
2081:
2082: if ($thisallowed=~/C/) {
2083: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2084: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2085: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2086: =~/$rolecode/) {
2087: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2088: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2089: $ENV{'request.course.id'});
2090: return '';
2091: }
2092:
2093: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2094: =~/$unamedom/) {
2095: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2096: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2097: $ENV{'request.course.id'});
2098: return '';
2099: }
2100: }
2101:
2102: # Resource preferences
2103:
2104: if ($thisallowed=~/R/) {
2105: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2106: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
2107: if (-e $filename) {
2108: my @content;
2109: {
2110: my $fh=Apache::File->new($filename);
2111: @content=<$fh>;
2112: }
2113: if (join('',@content)=~
2114: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
2115: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2116: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2117: return '';
2118:
2119: }
2120: }
2121: }
2122:
2123: # Restricted by state or randomout?
2124:
2125: if ($thisallowed=~/X/) {
2126: if ($ENV{'acc.randomout'}) {
2127: my $symb=&symbread($uri,1);
2128: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2129: return '';
2130: }
2131: }
2132: if (&condval($statecond)) {
2133: return '2';
2134: } else {
2135: return '';
2136: }
2137: }
2138:
2139: return 'F';
2140: }
2141:
2142: # --------------------------------------------------- Is a resource on the map?
2143:
2144: sub is_on_map {
2145: my $uri=&declutter(shift);
2146: my @uriparts=split(/\//,$uri);
2147: my $filename=$uriparts[$#uriparts];
2148: my $pathname=$uri;
2149: $pathname=~s|/\Q$filename\E$||;
2150: #Trying to find the conditional for the file
2151: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2152: /\&\Q$filename\E\:([\d\|]+)\&/);
2153: if ($match) {
2154: return (1,$1);
2155: } else {
2156: return (0,0);
2157: }
2158: }
2159:
2160: # ----------------------------------------------------------------- Define Role
2161:
2162: sub definerole {
2163: if (allowed('mcr','/')) {
2164: my ($rolename,$sysrole,$domrole,$courole)=@_;
2165: foreach (split('/',$sysrole)) {
2166: my ($crole,$cqual)=split(/\&/,$_);
2167: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2168: if ($pr{'cr:s'}=~/$crole\&/) {
2169: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2170: return "refused:s:$crole&$cqual";
2171: }
2172: }
2173: }
2174: foreach (split('/',$domrole)) {
2175: my ($crole,$cqual)=split(/\&/,$_);
2176: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2177: if ($pr{'cr:d'}=~/$crole\&/) {
2178: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2179: return "refused:d:$crole&$cqual";
2180: }
2181: }
2182: }
2183: foreach (split('/',$courole)) {
2184: my ($crole,$cqual)=split(/\&/,$_);
2185: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2186: if ($pr{'cr:c'}=~/$crole\&/) {
2187: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2188: return "refused:c:$crole&$cqual";
2189: }
2190: }
2191: }
2192: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2193: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2194: "rolesdef_$rolename=".
2195: escape($sysrole.'_'.$domrole.'_'.$courole);
2196: return reply($command,$ENV{'user.home'});
2197: } else {
2198: return 'refused';
2199: }
2200: }
2201:
2202: # ---------------- Make a metadata query against the network of library servers
2203:
2204: sub metadata_query {
2205: my ($query,$custom,$customshow,$server_array)=@_;
2206: my %rhash;
2207: my @server_list = (defined($server_array) ? @$server_array
2208: : keys(%libserv) );
2209: for my $server (@server_list) {
2210: unless ($custom or $customshow) {
2211: my $reply=&reply("querysend:".&escape($query),$server);
2212: $rhash{$server}=$reply;
2213: }
2214: else {
2215: my $reply=&reply("querysend:".&escape($query).':'.
2216: &escape($custom).':'.&escape($customshow),
2217: $server);
2218: $rhash{$server}=$reply;
2219: }
2220: }
2221: return \%rhash;
2222: }
2223:
2224: # ----------------------------------------- Send log queries and wait for reply
2225:
2226: sub log_query {
2227: my ($uname,$udom,$query,%filters)=@_;
2228: my $uhome=&homeserver($uname,$udom);
2229: if ($uhome eq 'no_host') { return 'error: no_host'; }
2230: my $uhost=$hostname{$uhome};
2231: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2232: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2233: $uhome);
2234: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2235: return get_query_reply($queryid);
2236: }
2237:
2238: sub get_query_reply {
2239: my $queryid=shift;
2240: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2241: my $reply='';
2242: for (1..100) {
2243: sleep 2;
2244: if (-e $replyfile.'.end') {
2245: if (my $fh=Apache::File->new($replyfile)) {
2246: $reply.=<$fh>;
2247: $fh->close;
2248: } else { return 'error: reply_file_error'; }
2249: return &unescape($reply);
2250: }
2251: }
2252: return 'timeout:'.$queryid;
2253: }
2254:
2255: sub courselog_query {
2256: #
2257: # possible filters:
2258: # url: url or symb
2259: # username
2260: # domain
2261: # action: view, submit, grade
2262: # start: timestamp
2263: # end: timestamp
2264: #
2265: my (%filters)=@_;
2266: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2267: if ($filters{'url'}) {
2268: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2269: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2270: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2271: }
2272: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2273: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2274: return &log_query($cname,$cdom,'courselog',%filters);
2275: }
2276:
2277: sub userlog_query {
2278: my ($uname,$udom,%filters)=@_;
2279: return &log_query($uname,$udom,'userlog',%filters);
2280: }
2281:
2282: # ------------------------------------------------------------------ Plain Text
2283:
2284: sub plaintext {
2285: my $short=shift;
2286: return $prp{$short};
2287: }
2288:
2289: # ----------------------------------------------------------------- Assign Role
2290:
2291: sub assignrole {
2292: my ($udom,$uname,$url,$role,$end,$start)=@_;
2293: my $mrole;
2294: if ($role =~ /^cr\//) {
2295: unless (&allowed('ccr',$url)) {
2296: &logthis('Refused custom assignrole: '.
2297: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2298: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2299: return 'refused';
2300: }
2301: $mrole='cr';
2302: } else {
2303: my $cwosec=$url;
2304: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2305: unless (&allowed('c'.$role,$cwosec)) {
2306: &logthis('Refused assignrole: '.
2307: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2308: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2309: return 'refused';
2310: }
2311: $mrole=$role;
2312: }
2313: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2314: "$udom:$uname:$url".'_'."$mrole=$role";
2315: if ($end) { $command.='_'.$end; }
2316: if ($start) {
2317: if ($end) {
2318: $command.='_'.$start;
2319: } else {
2320: $command.='_0_'.$start;
2321: }
2322: }
2323: return &reply($command,&homeserver($uname,$udom));
2324: }
2325:
2326: # -------------------------------------------------- Modify user authentication
2327: # Overrides without validation
2328:
2329: sub modifyuserauth {
2330: my ($udom,$uname,$umode,$upass)=@_;
2331: my $uhome=&homeserver($uname,$udom);
2332: unless (&allowed('mau',$udom)) { return 'refused'; }
2333: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2334: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2335: ' in domain '.$ENV{'request.role.domain'});
2336: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2337: &escape($upass),$uhome);
2338: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2339: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2340: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2341: &log($udom,,$uname,$uhome,
2342: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2343: $ENV{'user.name'}.', '.$umode.
2344: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2345: unless ($reply eq 'ok') {
2346: &logthis('Authentication mode error: '.$reply);
2347: return 'error: '.$reply;
2348: }
2349: return 'ok';
2350: }
2351:
2352: # --------------------------------------------------------------- Modify a user
2353:
2354: sub modifyuser {
2355: my ($udom, $uname, $uid,
2356: $umode, $upass, $first,
2357: $middle, $last, $gene,
2358: $forceid, $desiredhome)=@_;
2359: $udom=~s/\W//g;
2360: $uname=~s/\W//g;
2361: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2362: $umode.', '.$first.', '.$middle.', '.
2363: $last.', '.$gene.'(forceid: '.$forceid.')'.
2364: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2365: ' desiredhome not specified').
2366: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2367: ' in domain '.$ENV{'request.role.domain'});
2368: my $uhome=&homeserver($uname,$udom,'true');
2369: # ----------------------------------------------------------------- Create User
2370: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2371: my $unhome='';
2372: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2373: $unhome = $desiredhome;
2374: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2375: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2376: } else { # load balancing routine for determining $unhome
2377: my $tryserver;
2378: my $loadm=10000000;
2379: foreach $tryserver (keys %libserv) {
2380: if ($hostdom{$tryserver} eq $udom) {
2381: my $answer=reply('load',$tryserver);
2382: if (($answer=~/\d+/) && ($answer<$loadm)) {
2383: $loadm=$answer;
2384: $unhome=$tryserver;
2385: }
2386: }
2387: }
2388: }
2389: if (($unhome eq '') || ($unhome eq 'no_host')) {
2390: return 'error: unable to find a home server for '.$uname.
2391: ' in domain '.$udom;
2392: }
2393: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2394: &escape($upass),$unhome);
2395: unless ($reply eq 'ok') {
2396: return 'error: '.$reply;
2397: }
2398: $uhome=&homeserver($uname,$udom,'true');
2399: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2400: return 'error: verify home';
2401: }
2402: } # End of creation of new user
2403: # ---------------------------------------------------------------------- Add ID
2404: if ($uid) {
2405: $uid=~tr/A-Z/a-z/;
2406: my %uidhash=&idrget($udom,$uname);
2407: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2408: && (!$forceid)) {
2409: unless ($uid eq $uidhash{$uname}) {
2410: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2411: }
2412: } else {
2413: &idput($udom,($uname => $uid));
2414: }
2415: }
2416: # -------------------------------------------------------------- Add names, etc
2417: my @tmp=&get('environment',
2418: ['firstname','middlename','lastname','generation'],
2419: $udom,$uname);
2420: my %names;
2421: if ($tmp[0] =~ m/^error:.*/) {
2422: %names=();
2423: } else {
2424: %names = @tmp;
2425: }
2426: if ($first) { $names{'firstname'} = $first; }
2427: if ($middle) { $names{'middlename'} = $middle; }
2428: if ($last) { $names{'lastname'} = $last; }
2429: if ($gene) { $names{'generation'} = $gene; }
2430: my $reply = &put('environment', \%names, $udom,$uname);
2431: if ($reply ne 'ok') { return 'error: '.$reply; }
2432: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2433: $umode.', '.$first.', '.$middle.', '.
2434: $last.', '.$gene.' by '.
2435: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2436: return 'ok';
2437: }
2438:
2439: # -------------------------------------------------------------- Modify student
2440:
2441: sub modifystudent {
2442: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2443: $end,$start,$forceid,$desiredhome)=@_;
2444: my $cid='';
2445: unless ($cid=$ENV{'request.course.id'}) {
2446: return 'not_in_class';
2447: }
2448: # --------------------------------------------------------------- Make the user
2449: my $reply=&modifyuser
2450: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2451: $desiredhome);
2452: unless ($reply eq 'ok') { return $reply; }
2453: # This will cause &modify_student_enrollment to get the uid from the
2454: # students environment
2455: $uid = undef if (!$forceid);
2456: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2457: $last,$gene,$usec,$end,$start);
2458: return $reply;
2459: }
2460:
2461: sub modify_student_enrollment {
2462: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2463: # Get the course id from the environment
2464: my $cid='';
2465: unless ($cid=$ENV{'request.course.id'}) {
2466: return 'not_in_class';
2467: }
2468: # Make sure the user exists
2469: my $uhome=&homeserver($uname,$udom);
2470: if (($uhome eq '') || ($uhome eq 'no_host')) {
2471: return 'error: no such user';
2472: }
2473: #
2474: # Get student data if we were not given enough information
2475: if (!defined($first) || $first eq '' ||
2476: !defined($last) || $last eq '' ||
2477: !defined($uid) || $uid eq '' ||
2478: !defined($middle) || $middle eq '' ||
2479: !defined($gene) || $gene eq '') {
2480: # They did not supply us with enough data to enroll the student, so
2481: # we need to pick up more information.
2482: my %tmp = &get('environment',
2483: ['firstname','middlename','lastname', 'generation','id']
2484: ,$udom,$uname);
2485:
2486: foreach (keys(%tmp)) {
2487: &logthis("key $_ = ".$tmp{$_});
2488: }
2489: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2490: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2491: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
2492: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
2493: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2494: }
2495: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2496: $first,$middle);
2497: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2498: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2499: &escape($uname.':'.$udom).'='.
2500: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
2501: $ENV{'course.'.$cid.'.home'});
2502: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2503: return 'error: '.$reply;
2504: }
2505: # Add student role to user
2506: my $uurl='/'.$cid;
2507: $uurl=~s/\_/\//g;
2508: if ($usec) {
2509: $uurl.='/'.$usec;
2510: }
2511: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2512: }
2513:
2514: # ------------------------------------------------- Write to course preferences
2515:
2516: sub writecoursepref {
2517: my ($courseid,%prefs)=@_;
2518: $courseid=~s/^\///;
2519: $courseid=~s/\_/\//g;
2520: my ($cdomain,$cnum)=split(/\//,$courseid);
2521: my $chome=homeserver($cnum,$cdomain);
2522: if (($chome eq '') || ($chome eq 'no_host')) {
2523: return 'error: no such course';
2524: }
2525: my $cstring='';
2526: foreach (keys %prefs) {
2527: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2528: }
2529: $cstring=~s/\&$//;
2530: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2531: }
2532:
2533: # ---------------------------------------------------------- Make/modify course
2534:
2535: sub createcourse {
2536: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2537: $url=&declutter($url);
2538: my $cid='';
2539: unless (&allowed('ccc',$udom)) {
2540: return 'refused';
2541: }
2542: # ------------------------------------------------------------------- Create ID
2543: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2544: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2545: # ----------------------------------------------- Make sure that does not exist
2546: my $uhome=&homeserver($uname,$udom,'true');
2547: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2548: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2549: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2550: $uhome=&homeserver($uname,$udom,'true');
2551: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2552: return 'error: unable to generate unique course-ID';
2553: }
2554: }
2555: # ------------------------------------------------ Check supplied server name
2556: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2557: if (! exists($libserv{$course_server})) {
2558: return 'error:bad server name '.$course_server;
2559: }
2560: # ------------------------------------------------------------- Make the course
2561: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2562: $course_server);
2563: unless ($reply eq 'ok') { return 'error: '.$reply; }
2564: $uhome=&homeserver($uname,$udom,'true');
2565: if (($uhome eq '') || ($uhome eq 'no_host')) {
2566: return 'error: no such course';
2567: }
2568: # ----------------------------------------------------------------- Course made
2569: my $topurl=$url;
2570: unless ($nonstandard) {
2571: # ------------------------------------------ For standard courses, make top url
2572: my $mapurl=&clutter($url);
2573: if ($mapurl eq '/res/') { $mapurl=''; }
2574: $ENV{'form.initmap'}=(<<ENDINITMAP);
2575: <map>
2576: <resource id="1" type="start"></resource>
2577: <resource id="2" src="$mapurl"></resource>
2578: <resource id="3" type="finish"></resource>
2579: <link index="1" from="1" to="2"></link>
2580: <link index="2" from="2" to="3"></link>
2581: </map>
2582: ENDINITMAP
2583: $topurl=&declutter(
2584: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2585: );
2586: }
2587: # ----------------------------------------------------------- Write preferences
2588: &writecoursepref($udom.'_'.$uname,
2589: ('description' => $description,
2590: 'url' => $topurl));
2591: return '/'.$udom.'/'.$uname;
2592: }
2593:
2594: # ---------------------------------------------------------- Assign Custom Role
2595:
2596: sub assigncustomrole {
2597: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2598: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2599: $end,$start);
2600: }
2601:
2602: # ----------------------------------------------------------------- Revoke Role
2603:
2604: sub revokerole {
2605: my ($udom,$uname,$url,$role)=@_;
2606: my $now=time;
2607: return &assignrole($udom,$uname,$url,$role,$now);
2608: }
2609:
2610: # ---------------------------------------------------------- Revoke Custom Role
2611:
2612: sub revokecustomrole {
2613: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2614: my $now=time;
2615: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2616: }
2617:
2618: # ------------------------------------------------------------ Directory lister
2619:
2620: sub dirlist {
2621: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2622:
2623: $uri=~s/^\///;
2624: $uri=~s/\/$//;
2625: my ($udom, $uname);
2626: (undef,$udom,$uname)=split(/\//,$uri);
2627: if(defined($userdomain)) {
2628: $udom = $userdomain;
2629: }
2630: if(defined($username)) {
2631: $uname = $username;
2632: }
2633:
2634: my $dirRoot = $perlvar{'lonDocRoot'};
2635: if(defined($alternateDirectoryRoot)) {
2636: $dirRoot = $alternateDirectoryRoot;
2637: $dirRoot =~ s/\/$//;
2638: }
2639:
2640: if($udom) {
2641: if($uname) {
2642: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2643: homeserver($uname,$udom));
2644: return split(/:/,$listing);
2645: } elsif(!defined($alternateDirectoryRoot)) {
2646: my $tryserver;
2647: my %allusers=();
2648: foreach $tryserver (keys %libserv) {
2649: if($hostdom{$tryserver} eq $udom) {
2650: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2651: $udom, $tryserver);
2652: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2653: && ($listing ne 'con_lost')) {
2654: foreach (split(/:/,$listing)) {
2655: my ($entry,@stat)=split(/&/,$_);
2656: $allusers{$entry}=1;
2657: }
2658: }
2659: }
2660: }
2661: my $alluserstr='';
2662: foreach (sort keys %allusers) {
2663: $alluserstr.=$_.'&user:';
2664: }
2665: $alluserstr=~s/:$//;
2666: return split(/:/,$alluserstr);
2667: } else {
2668: my @emptyResults = ();
2669: push(@emptyResults, 'missing user name');
2670: return split(':',@emptyResults);
2671: }
2672: } elsif(!defined($alternateDirectoryRoot)) {
2673: my $tryserver;
2674: my %alldom=();
2675: foreach $tryserver (keys %libserv) {
2676: $alldom{$hostdom{$tryserver}}=1;
2677: }
2678: my $alldomstr='';
2679: foreach (sort keys %alldom) {
2680: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2681: }
2682: $alldomstr=~s/:$//;
2683: return split(/:/,$alldomstr);
2684: } else {
2685: my @emptyResults = ();
2686: push(@emptyResults, 'missing domain');
2687: return split(':',@emptyResults);
2688: }
2689: }
2690:
2691: # --------------------------------------------- GetFileTimestamp
2692: # This function utilizes dirlist and returns the date stamp for
2693: # when it was last modified. It will also return an error of -1
2694: # if an error occurs
2695:
2696: sub GetFileTimestamp {
2697: my ($studentDomain,$studentName,$filename,$root)=@_;
2698: $studentDomain=~s/\W//g;
2699: $studentName=~s/\W//g;
2700: my $subdir=$studentName.'__';
2701: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
2702: my $proname="$studentDomain/$subdir/$studentName";
2703: $proname .= '/'.$filename;
2704: my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
2705: $root);
2706: my $fileStat = $dir[0];
2707: my @stats = split('&', $fileStat);
2708: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
2709: return $stats[9];
2710: } else {
2711: return -1;
2712: }
2713: }
2714:
2715: # -------------------------------------------------------- Value of a Condition
2716:
2717: sub directcondval {
2718: my $number=shift;
2719: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2720: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2721: } else {
2722: return 2;
2723: }
2724: }
2725:
2726: sub condval {
2727: my $condidx=shift;
2728: my $result=0;
2729: my $allpathcond='';
2730: foreach (split(/\|/,$condidx)) {
2731: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2732: $allpathcond.=
2733: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2734: }
2735: }
2736: $allpathcond=~s/\|$//;
2737: if ($ENV{'request.course.id'}) {
2738: if ($allpathcond) {
2739: my $operand='|';
2740: my @stack;
2741: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2742: if ($_ eq '(') {
2743: push @stack,($operand,$result)
2744: } elsif ($_ eq ')') {
2745: my $before=pop @stack;
2746: if (pop @stack eq '&') {
2747: $result=$result>$before?$before:$result;
2748: } else {
2749: $result=$result>$before?$result:$before;
2750: }
2751: } elsif (($_ eq '&') || ($_ eq '|')) {
2752: $operand=$_;
2753: } else {
2754: my $new=directcondval($_);
2755: if ($operand eq '&') {
2756: $result=$result>$new?$new:$result;
2757: } else {
2758: $result=$result>$new?$result:$new;
2759: }
2760: }
2761: }
2762: }
2763: }
2764: return $result;
2765: }
2766:
2767: # ---------------------------------------------------- Devalidate courseresdata
2768:
2769: sub devalidatecourseresdata {
2770: my ($coursenum,$coursedomain)=@_;
2771: my $hashid=$coursenum.':'.$coursedomain;
2772: delete $courseresdatacache{$hashid.'.time'};
2773: }
2774:
2775: # --------------------------------------------------- Course Resourcedata Query
2776:
2777: sub courseresdata {
2778: my ($coursenum,$coursedomain,@which)=@_;
2779: my $coursehom=&homeserver($coursenum,$coursedomain);
2780: my $hashid=$coursenum.':'.$coursedomain;
2781: my $dodump=0;
2782: if (!defined($courseresdatacache{$hashid.'.time'})) {
2783: $dodump=1;
2784: } else {
2785: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2786: }
2787: if ($dodump) {
2788: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2789: my ($tmp) = keys(%dumpreply);
2790: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2791: $courseresdatacache{$hashid.'.time'}=time;
2792: $courseresdatacache{$hashid}=\%dumpreply;
2793: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
2794: return $tmp;
2795: }
2796: }
2797: foreach my $item (@which) {
2798: if (defined($courseresdatacache{$hashid}->{$item})) {
2799: return $courseresdatacache{$hashid}->{$item};
2800: }
2801: }
2802: return undef;
2803: }
2804:
2805: # --------------------------------------------------------- Value of a Variable
2806:
2807: sub EXT {
2808: my ($varname,$symbparm,$udom,$uname,)=@_;
2809:
2810: unless ($varname) { return ''; }
2811:
2812: #get real user name/domain, courseid and symb
2813: my $courseid;
2814: if (!($uname && $udom)) {
2815: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2816: if (!$symbparm) { $symbparm=$cursymb; }
2817: } else {
2818: $courseid=$ENV{'request.course.id'};
2819: }
2820:
2821: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2822: my $rest;
2823: if ($therest[0]) {
2824: $rest=join('.',@therest);
2825: } else {
2826: $rest='';
2827: }
2828: my $qualifierrest=$qualifier;
2829: if ($rest) { $qualifierrest.='.'.$rest; }
2830: my $spacequalifierrest=$space;
2831: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2832: if ($realm eq 'user') {
2833: # --------------------------------------------------------------- user.resource
2834: if ($space eq 'resource') {
2835: my %restored=&restore(undef,undef,$udom,$uname);
2836: return $restored{$qualifierrest};
2837: # ----------------------------------------------------------------- user.access
2838: } elsif ($space eq 'access') {
2839: # FIXME - not supporting calls for a specific user
2840: return &allowed($qualifier,$rest);
2841: # ------------------------------------------ user.preferences, user.environment
2842: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2843: if (($uname eq $ENV{'user.name'}) &&
2844: ($udom eq $ENV{'user.domain'})) {
2845: return $ENV{join('.',('environment',$qualifierrest))};
2846: } else {
2847: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2848: return $returnhash{$qualifierrest};
2849: }
2850: # ----------------------------------------------------------------- user.course
2851: } elsif ($space eq 'course') {
2852: # FIXME - not supporting calls for a specific user
2853: return $ENV{join('.',('request.course',$qualifier))};
2854: # ------------------------------------------------------------------- user.role
2855: } elsif ($space eq 'role') {
2856: # FIXME - not supporting calls for a specific user
2857: my ($role,$where)=split(/\./,$ENV{'request.role'});
2858: if ($qualifier eq 'value') {
2859: return $role;
2860: } elsif ($qualifier eq 'extent') {
2861: return $where;
2862: }
2863: # ----------------------------------------------------------------- user.domain
2864: } elsif ($space eq 'domain') {
2865: return $udom;
2866: # ------------------------------------------------------------------- user.name
2867: } elsif ($space eq 'name') {
2868: return $uname;
2869: # ---------------------------------------------------- Any other user namespace
2870: } else {
2871: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2872: my %reply=&get($space,[$item]);
2873: return $reply{$item};
2874: }
2875: } elsif ($realm eq 'query') {
2876: # ---------------------------------------------- pull stuff out of query string
2877: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
2878: return $ENV{'form.'.$space};
2879: } elsif ($realm eq 'request') {
2880: # ------------------------------------------------------------- request.browser
2881: if ($space eq 'browser') {
2882: return $ENV{'browser.'.$qualifier};
2883: # ------------------------------------------------------------ request.filename
2884: } else {
2885: return $ENV{'request.'.$spacequalifierrest};
2886: }
2887: } elsif ($realm eq 'course') {
2888: # ---------------------------------------------------------- course.description
2889: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
2890: } elsif ($realm eq 'resource') {
2891:
2892: if ($courseid eq $ENV{'request.course.id'}) {
2893:
2894: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2895:
2896: # ----------------------------------------------------- Cascading lookup scheme
2897: if (!$symbparm) { $symbparm=&symbread(); }
2898: my $symbp=$symbparm;
2899: my $mapp=(split(/\_\_\_/,$symbp))[0];
2900:
2901: my $symbparm=$symbp.'.'.$spacequalifierrest;
2902: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2903:
2904: my $section;
2905: if (($ENV{'user.name'} eq $uname) &&
2906: ($ENV{'user.domain'} eq $udom)) {
2907: $section=$ENV{'request.course.sec'};
2908: } else {
2909: $section=&usection($udom,$uname,$courseid);
2910: }
2911:
2912: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
2913: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
2914: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
2915:
2916: my $courselevel=$courseid.'.'.$spacequalifierrest;
2917: my $courselevelr=$courseid.'.'.$symbparm;
2918: my $courselevelm=$courseid.'.'.$mapparm;
2919:
2920: # ----------------------------------------------------------- first, check user
2921: #most student don't have any data set, check if there is some data
2922: #every thirty minutes
2923: if (!
2924: (exists($ENV{'cache.studentresdata'})
2925: && (($ENV{'cache.studentresdata'}+1800) > time))) {
2926: my %resourcedata=&get('resourcedata',
2927: [$courselevelr,$courselevelm,$courselevel],
2928: $udom,$uname);
2929: my ($tmp)=keys(%resourcedata);
2930: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
2931: if ($resourcedata{$courselevelr}) {
2932: return $resourcedata{$courselevelr}; }
2933: if ($resourcedata{$courselevelm}) {
2934: return $resourcedata{$courselevelm}; }
2935: if ($resourcedata{$courselevel}) {
2936: return $resourcedata{$courselevel}; }
2937: } else {
2938: if ($tmp!~/No such file/) {
2939: &logthis("<font color=blue>WARNING:".
2940: " Trying to get resource data for ".
2941: $uname." at ".$udom.": ".
2942: $tmp."</font>");
2943: } elsif ($tmp=~/error:No such file/) {
2944: $ENV{'cache.studentresdata'}=time;
2945: &appenv(('cache.studentresdata'=>
2946: $ENV{'cache.studentresdata'}));
2947: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
2948: return $tmp;
2949: }
2950: }
2951: }
2952:
2953: # -------------------------------------------------------- second, check course
2954:
2955: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
2956: $ENV{'course.'.$courseid.'.domain'},
2957: ($seclevelr,$seclevelm,$seclevel,
2958: $courselevelr,$courselevelm,
2959: $courselevel));
2960: if (defined($coursereply)) { return $coursereply; }
2961:
2962: # ------------------------------------------------------ third, check map parms
2963: my %parmhash=();
2964: my $thisparm='';
2965: if (tie(%parmhash,'GDBM_File',
2966: $ENV{'request.course.fn'}.'_parms.db',
2967: &GDBM_READER(),0640)) {
2968: $thisparm=$parmhash{$symbparm};
2969: untie(%parmhash);
2970: }
2971: if ($thisparm) { return $thisparm; }
2972: }
2973: # --------------------------------------------- last, look in resource metadata
2974:
2975: $spacequalifierrest=~s/\./\_/;
2976: my $filename;
2977: if (!$symbparm) { $symbparm=&symbread(); }
2978: if ($symbparm) {
2979: $filename=(split(/\_\_\_/,$symbparm))[2];
2980: } else {
2981: $filename=$ENV{'request.filename'};
2982: }
2983: my $metadata=&metadata($filename,$spacequalifierrest);
2984: if (defined($metadata)) { return $metadata; }
2985: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
2986: if (defined($metadata)) { return $metadata; }
2987:
2988: # ------------------------------------------------------------------ Cascade up
2989: unless ($space eq '0') {
2990: my ($part,$id)=split(/\_/,$space);
2991: if ($id) {
2992: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2993: $symbparm,$udom,$uname);
2994: if (defined($partgeneral)) { return $partgeneral; }
2995: } else {
2996: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2997: $symbparm,$udom,$uname);
2998: if (defined($resourcegeneral)) { return $resourcegeneral; }
2999: }
3000: }
3001:
3002: # ---------------------------------------------------- Any other user namespace
3003: } elsif ($realm eq 'environment') {
3004: # ----------------------------------------------------------------- environment
3005: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3006: return $ENV{'environment.'.$spacequalifierrest};
3007: } else {
3008: my %returnhash=&userenvironment($udom,$uname,
3009: $spacequalifierrest);
3010: return $returnhash{$spacequalifierrest};
3011: }
3012: } elsif ($realm eq 'system') {
3013: # ----------------------------------------------------------------- system.time
3014: if ($space eq 'time') {
3015: return time;
3016: }
3017: }
3018: return '';
3019: }
3020:
3021: # ---------------------------------------------------------------- Get metadata
3022:
3023: sub metadata {
3024: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3025:
3026: $uri=&declutter($uri);
3027: # if it is a non metadata possible uri return quickly
3028: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3029: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
3030: return '';
3031: }
3032: my $filename=$uri;
3033: $uri=~s/\.meta$//;
3034: #
3035: # Is the metadata already cached?
3036: # Look at timestamp of caching
3037: # Everything is cached by the main uri, libraries are never directly cached
3038: #
3039: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3040: #
3041: # Is this a recursive call for a library?
3042: #
3043: if ($liburi) {
3044: $liburi=&declutter($liburi);
3045: $filename=$liburi;
3046: }
3047: my %metathesekeys=();
3048: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3049: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
3050: my $parser=HTML::LCParser->new(\$metastring);
3051: my $token;
3052: undef %metathesekeys;
3053: while ($token=$parser->get_token) {
3054: if ($token->[0] eq 'S') {
3055: if (defined($token->[2]->{'package'})) {
3056: #
3057: # This is a package - get package info
3058: #
3059: my $package=$token->[2]->{'package'};
3060: my $keyroot='';
3061: if ($prefix) {
3062: $keyroot.=$prefix;
3063: } else {
3064: if (defined($token->[2]->{'part'})) {
3065: $keyroot.='_'.$token->[2]->{'part'};
3066: }
3067: }
3068: if (defined($token->[2]->{'id'})) {
3069: $keyroot.='_'.$token->[2]->{'id'};
3070: }
3071: if ($metacache{$uri.':packages'}) {
3072: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3073: } else {
3074: $metacache{$uri.':packages'}=$package.$keyroot;
3075: }
3076: foreach (keys %packagetab) {
3077: if ($_=~/^$package\&/) {
3078: my ($pack,$name,$subp)=split(/\&/,$_);
3079: my $value=$packagetab{$_};
3080: my $part=$keyroot;
3081: $part=~s/^\_//;
3082: if ($subp eq 'display') {
3083: $value.=' [Part: '.$part.']';
3084: }
3085: my $unikey='parameter'.$keyroot.'_'.$name;
3086: $metathesekeys{$unikey}=1;
3087: $metacache{$uri.':'.$unikey.'.part'}=$part;
3088: unless
3089: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3090: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3091: }
3092: }
3093: }
3094: } else {
3095: #
3096: # This is not a package - some other kind of start tag
3097: #
3098: my $entry=$token->[1];
3099: my $unikey;
3100: if ($entry eq 'import') {
3101: $unikey='';
3102: } else {
3103: $unikey=$entry;
3104: }
3105: if ($prefix) {
3106: $unikey.=$prefix;
3107: } else {
3108: if (defined($token->[2]->{'part'})) {
3109: $unikey.='_'.$token->[2]->{'part'};
3110: }
3111: }
3112: if (defined($token->[2]->{'id'})) {
3113: $unikey.='_'.$token->[2]->{'id'};
3114: }
3115:
3116: if ($entry eq 'import') {
3117: #
3118: # Importing a library here
3119: #
3120: if ($depthcount<20) {
3121: my $location=$parser->get_text('/import');
3122: my $dir=$filename;
3123: $dir=~s|[^/]*$||;
3124: $location=&filelocation($dir,$location);
3125: foreach (sort(split(/\,/,&metadata($uri,'keys',
3126: $location,$unikey,
3127: $depthcount+1)))) {
3128: $metathesekeys{$_}=1;
3129: }
3130: }
3131: } else {
3132:
3133: if (defined($token->[2]->{'name'})) {
3134: $unikey.='_'.$token->[2]->{'name'};
3135: }
3136: $metathesekeys{$unikey}=1;
3137: foreach (@{$token->[3]}) {
3138: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3139: }
3140: unless (
3141: $metacache{$uri.':'.$unikey}=&HTML::Entities::decode($parser->get_text('/'.$entry))
3142: ) { $metacache{$uri.':'.$unikey}=
3143: $metacache{$uri.':'.$unikey.'.default'};
3144: }
3145: # end of not-a-package not-a-library import
3146: }
3147: # end of not-a-package start tag
3148: }
3149: # the next is the end of "start tag"
3150: }
3151: }
3152: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3153: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3154: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3155: $metacache{$uri.':cachedtimestamp'}=time;
3156: # this is the end of "was not already recently cached
3157: }
3158: return $metacache{$uri.':'.$what};
3159: }
3160:
3161: sub metadata_generate_part0 {
3162: my ($metadata,$metacache,$uri) = @_;
3163: my %allnames;
3164: foreach my $metakey (sort keys %$metadata) {
3165: if ($metakey=~/^parameter\_(.*)/) {
3166: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3167: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3168: if (! exists($$metadata{'parameter_0_'.$name})) {
3169: $allnames{$name}=$part;
3170: }
3171: }
3172: }
3173: foreach my $name (keys(%allnames)) {
3174: $$metadata{"parameter_0_$name"}=1;
3175: my $key="$uri:parameter_0_$name";
3176: $$metacache{"$key.part"}='0';
3177: $$metacache{"$key.name"}=$name;
3178: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3179: $allnames{$name}.'_'.$name.
3180: '.type'};
3181: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3182: '.display'};
3183: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3184: $olddis=~s/$expr/\[Part: 0\]/;
3185: $$metacache{"$key.display"}=$olddis;
3186: }
3187: }
3188:
3189: # ------------------------------------------------- Get the title of a resource
3190:
3191: sub gettitle {
3192: my $urlsymb=shift;
3193: my $symb=&symbread($urlsymb);
3194: unless ($symb) {
3195: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3196: return &metadata($urlsymb,'title');
3197: }
3198: if ($titlecache{$symb}) { return $titlecache{$symb}; }
3199: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3200: my $title='';
3201: my %bighash;
3202: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3203: &GDBM_READER(),0640)) {
3204: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3205: $title=$bighash{'title_'.$mapid.'.'.$resid};
3206: untie %bighash;
3207: }
3208: if ($title) {
3209: $titlecache{$symb}=$title;
3210: return $title;
3211: } else {
3212: return &metadata($urlsymb,'title');
3213: }
3214: }
3215:
3216: # ------------------------------------------------- Update symbolic store links
3217:
3218: sub symblist {
3219: my ($mapname,%newhash)=@_;
3220: $mapname=declutter($mapname);
3221: my %hash;
3222: if (($ENV{'request.course.fn'}) && (%newhash)) {
3223: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3224: &GDBM_WRCREAT(),0640)) {
3225: foreach (keys %newhash) {
3226: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3227: }
3228: if (untie(%hash)) {
3229: return 'ok';
3230: }
3231: }
3232: }
3233: return 'error';
3234: }
3235:
3236: # --------------------------------------------------------------- Verify a symb
3237:
3238: sub symbverify {
3239: my ($symb,$thisfn)=@_;
3240: $thisfn=&declutter($thisfn);
3241: # direct jump to resource in page or to a sequence - will construct own symbs
3242: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3243: # check URL part
3244: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3245: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3246:
3247: $symb=&symbclean($symb);
3248:
3249: my %bighash;
3250: my $okay=0;
3251: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3252: &GDBM_READER(),0640)) {
3253: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3254: unless ($ids) {
3255: $ids=$bighash{'ids_/'.$thisfn};
3256: }
3257: if ($ids) {
3258: # ------------------------------------------------------------------- Has ID(s)
3259: foreach (split(/\,/,$ids)) {
3260: my ($mapid,$resid)=split(/\./,$_);
3261: if (
3262: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3263: eq $symb) {
3264: $okay=1;
3265: }
3266: }
3267: }
3268: untie(%bighash);
3269: }
3270: return $okay;
3271: }
3272:
3273: # --------------------------------------------------------------- Clean-up symb
3274:
3275: sub symbclean {
3276: my $symb=shift;
3277:
3278: # remove version from map
3279: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3280:
3281: # remove version from URL
3282: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3283:
3284: return $symb;
3285: }
3286:
3287: # ------------------------------------------------------ Return symb list entry
3288:
3289: sub symbread {
3290: my ($thisfn,$donotrecurse)=@_;
3291: # no filename provided? try from environment
3292: unless ($thisfn) {
3293: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3294: $thisfn=$ENV{'request.filename'};
3295: }
3296: # is that filename actually a symb? Verify, clean, and return
3297: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3298: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3299: }
3300: $thisfn=declutter($thisfn);
3301: my %hash;
3302: my %bighash;
3303: my $syval='';
3304: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3305: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3306: &GDBM_READER(),0640)) {
3307: $syval=$hash{$thisfn};
3308: untie(%hash);
3309: }
3310: # ---------------------------------------------------------- There was an entry
3311: if ($syval) {
3312: unless ($syval=~/\_\d+$/) {
3313: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3314: &appenv('request.ambiguous' => $thisfn);
3315: return '';
3316: }
3317: $syval.=$1;
3318: }
3319: } else {
3320: # ------------------------------------------------------- Was not in symb table
3321: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3322: &GDBM_READER(),0640)) {
3323: # ---------------------------------------------- Get ID(s) for current resource
3324: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3325: unless ($ids) {
3326: $ids=$bighash{'ids_/'.$thisfn};
3327: }
3328: unless ($ids) {
3329: # alias?
3330: $ids=$bighash{'mapalias_'.$thisfn};
3331: }
3332: if ($ids) {
3333: # ------------------------------------------------------------------- Has ID(s)
3334: my @possibilities=split(/\,/,$ids);
3335: if ($#possibilities==0) {
3336: # ----------------------------------------------- There is only one possibility
3337: my ($mapid,$resid)=split(/\./,$ids);
3338: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3339: } elsif (!$donotrecurse) {
3340: # ------------------------------------------ There is more than one possibility
3341: my $realpossible=0;
3342: foreach (@possibilities) {
3343: my $file=$bighash{'src_'.$_};
3344: if (&allowed('bre',$file)) {
3345: my ($mapid,$resid)=split(/\./,$_);
3346: if ($bighash{'map_type_'.$mapid} ne 'page') {
3347: $realpossible++;
3348: $syval=declutter($bighash{'map_id_'.$mapid}).
3349: '___'.$resid;
3350: }
3351: }
3352: }
3353: if ($realpossible!=1) { $syval=''; }
3354: } else {
3355: $syval='';
3356: }
3357: }
3358: untie(%bighash)
3359: }
3360: }
3361: if ($syval) {
3362: return &symbclean($syval.'___'.$thisfn);
3363: }
3364: }
3365: &appenv('request.ambiguous' => $thisfn);
3366: return '';
3367: }
3368:
3369: # ---------------------------------------------------------- Return random seed
3370:
3371: sub numval {
3372: my $txt=shift;
3373: $txt=~tr/A-J/0-9/;
3374: $txt=~tr/a-j/0-9/;
3375: $txt=~tr/K-T/0-9/;
3376: $txt=~tr/k-t/0-9/;
3377: $txt=~tr/U-Z/0-5/;
3378: $txt=~tr/u-z/0-5/;
3379: $txt=~s/\D//g;
3380: return int($txt);
3381: }
3382:
3383: sub rndseed {
3384: my ($symb,$courseid,$domain,$username)=@_;
3385: if (!$symb) {
3386: unless ($symb=&symbread()) { return time; }
3387: }
3388: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3389: if (!$domain) {$domain=$ENV{'user.domain'};}
3390: if (!$username) {$username=$ENV{'user.name'};}
3391: {
3392: use integer;
3393: my $symbchck=unpack("%32C*",$symb) << 27;
3394: my $symbseed=numval($symb) << 22;
3395: my $namechck=unpack("%32C*",$username) << 17;
3396: my $nameseed=numval($username) << 12;
3397: my $domainseed=unpack("%32C*",$domain) << 7;
3398: my $courseseed=unpack("%32C*",$courseid);
3399: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3400: #uncommenting these lines can break things!
3401: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3402: #&Apache::lonxml::debug("rndseed :$num:$symb");
3403: return $num;
3404: }
3405: }
3406:
3407: sub ireceipt {
3408: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3409: my $cuname=unpack("%32C*",$funame);
3410: my $cudom=unpack("%32C*",$fudom);
3411: my $cucourseid=unpack("%32C*",$fucourseid);
3412: my $cusymb=unpack("%32C*",$fusymb);
3413: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3414: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3415: ($cunique%$cuname+
3416: $cunique%$cudom+
3417: $cusymb%$cuname+
3418: $cusymb%$cudom+
3419: $cucourseid%$cuname+
3420: $cucourseid%$cudom);
3421: }
3422:
3423: sub receipt {
3424: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3425: return &ireceipt($name,$domain,$courseid,$symb);
3426: }
3427:
3428: # ------------------------------------------------------------ Serves up a file
3429: # returns either the contents of the file or a -1
3430: sub getfile {
3431: my $file=shift;
3432: if ($file=~/^\/*uploaded\//) { # user file
3433: my $ua=new LWP::UserAgent;
3434: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3435: my $response=$ua->request($request);
3436: if ($response->is_success()) {
3437: return $response->content;
3438: } else {
3439: return -1;
3440: }
3441: } else { # normal file from res space
3442: &repcopy($file);
3443: if (! -e $file ) { return -1; };
3444: my $fh=Apache::File->new($file);
3445: my $a='';
3446: while (<$fh>) { $a .=$_; }
3447: return $a;
3448: }
3449: }
3450:
3451: sub filelocation {
3452: my ($dir,$file) = @_;
3453: my $location;
3454: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3455: if ($file=~m:^/~:) { # is a contruction space reference
3456: $location = $file;
3457: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3458: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3459: $location=$file;
3460: } else {
3461: $file=~s/^$perlvar{'lonDocRoot'}//;
3462: $file=~s:^/*res::;
3463: if ( !( $file =~ m:^/:) ) {
3464: $location = $dir. '/'.$file;
3465: } else {
3466: $location = '/home/httpd/html/res'.$file;
3467: }
3468: }
3469: $location=~s://+:/:g; # remove duplicate /
3470: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3471: return $location;
3472: }
3473:
3474: sub hreflocation {
3475: my ($dir,$file)=@_;
3476: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3477: my $finalpath=filelocation($dir,$file);
3478: $finalpath=~s/^\/home\/httpd\/html//;
3479: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3480: return $finalpath;
3481: } else {
3482: return $file;
3483: }
3484: }
3485:
3486: # ------------------------------------------------------------- Declutters URLs
3487:
3488: sub declutter {
3489: my $thisfn=shift;
3490: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3491: $thisfn=~s/^\///;
3492: $thisfn=~s/^res\///;
3493: $thisfn=~s/\?.+$//;
3494: return $thisfn;
3495: }
3496:
3497: # ------------------------------------------------------------- Clutter up URLs
3498:
3499: sub clutter {
3500: my $thisfn='/'.&declutter(shift);
3501: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3502: $thisfn='/res'.$thisfn;
3503: }
3504: return $thisfn;
3505: }
3506:
3507: # -------------------------------------------------------- Escape Special Chars
3508:
3509: sub escape {
3510: my $str=shift;
3511: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3512: return $str;
3513: }
3514:
3515: # ----------------------------------------------------- Un-Escape Special Chars
3516:
3517: sub unescape {
3518: my $str=shift;
3519: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3520: return $str;
3521: }
3522:
3523: # ================================================================ Main Program
3524:
3525: sub goodbye {
3526: &logthis("Starting Shut down");
3527: &flushcourselogs();
3528: &logthis("Shutting down");
3529: }
3530:
3531: BEGIN {
3532: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3533: unless ($readit) {
3534: {
3535: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3536:
3537: while (my $configline=<$config>) {
3538: if ($configline =~ /^[^\#]*PerlSetVar/) {
3539: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3540: chomp($varvalue);
3541: $perlvar{$varname}=$varvalue;
3542: }
3543: }
3544: }
3545: {
3546: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3547:
3548: while (my $configline=<$config>) {
3549: if ($configline =~ /^[^\#]*PerlSetVar/) {
3550: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3551: chomp($varvalue);
3552: $perlvar{$varname}=$varvalue;
3553: }
3554: }
3555: }
3556:
3557: # ------------------------------------------------------------- Read hosts file
3558: {
3559: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3560:
3561: while (my $configline=<$config>) {
3562: next if ($configline =~ /^(\#|\s*$)/);
3563: chomp($configline);
3564: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3565: if ($id && $domain && $role && $name && $ip) {
3566: $hostname{$id}=$name;
3567: $hostdom{$id}=$domain;
3568: $hostip{$id}=$ip;
3569: $iphost{$ip}=$id;
3570: if ($domdescr) { $domaindescription{$domain}=$domdescr; }
3571: if ($role eq 'library') { $libserv{$id}=$name; }
3572: } else {
3573: if ($configline) {
3574: &logthis("Skipping hosts.tab line -$configline-");
3575: }
3576: }
3577: }
3578: }
3579:
3580: # ------------------------------------------------------ Read spare server file
3581: {
3582: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3583:
3584: while (my $configline=<$config>) {
3585: chomp($configline);
3586: if ($configline) {
3587: $spareid{$configline}=1;
3588: }
3589: }
3590: }
3591: # ------------------------------------------------------------ Read permissions
3592: {
3593: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3594:
3595: while (my $configline=<$config>) {
3596: chomp($configline);
3597: if ($configline) {
3598: my ($role,$perm)=split(/ /,$configline);
3599: if ($perm ne '') { $pr{$role}=$perm; }
3600: }
3601: }
3602: }
3603:
3604: # -------------------------------------------- Read plain texts for permissions
3605: {
3606: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3607:
3608: while (my $configline=<$config>) {
3609: chomp($configline);
3610: if ($configline) {
3611: my ($short,$plain)=split(/:/,$configline);
3612: if ($plain ne '') { $prp{$short}=$plain; }
3613: }
3614: }
3615: }
3616:
3617: # ---------------------------------------------------------- Read package table
3618: {
3619: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3620:
3621: while (my $configline=<$config>) {
3622: chomp($configline);
3623: my ($short,$plain)=split(/:/,$configline);
3624: my ($pack,$name)=split(/\&/,$short);
3625: if ($plain ne '') {
3626: $packagetab{$pack.'&'.$name.'&name'}=$name;
3627: $packagetab{$short}=$plain;
3628: }
3629: }
3630: }
3631:
3632: %metacache=();
3633:
3634: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
3635: $dumpcount=0;
3636:
3637: &logtouch();
3638: &logthis('<font color=yellow>INFO: Read configuration</font>');
3639: $readit=1;
3640: }
3641: }
3642:
3643: 1;
3644: __END__
3645:
3646: =pod
3647:
3648: =head1 NAME
3649:
3650: Apache::lonnet - Subroutines to ask questions about things in the network.
3651:
3652: =head1 SYNOPSIS
3653:
3654: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3655:
3656: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3657:
3658: Common parameters:
3659:
3660: =over 4
3661:
3662: =item *
3663:
3664: $uname : an internal username (if $cname expecting a course Id specifically)
3665:
3666: =item *
3667:
3668: $udom : a domain (if $cdom expecting a course's domain specifically)
3669:
3670: =item *
3671:
3672: $symb : a resource instance identifier
3673:
3674: =item *
3675:
3676: $namespace : the name of a .db file that contains the data needed or
3677: being set.
3678:
3679: =back
3680:
3681: =head1 INTRODUCTION
3682:
3683: This module provides subroutines which interact with the
3684: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3685: - classes
3686: - users
3687: - resources
3688:
3689: For many of these objects you can also use this to store data about
3690: them or modify them in various ways.
3691:
3692: This is part of the LearningOnline Network with CAPA project
3693: described at http://www.lon-capa.org.
3694:
3695: =head1 RETURN MESSAGES
3696:
3697: =over 4
3698:
3699: =item *
3700:
3701: con_lost : unable to contact remote host
3702:
3703: =item *
3704:
3705: con_delayed : unable to contact remote host, message will be delivered
3706: when the connection is brought back up
3707:
3708: =item *
3709:
3710: con_failed : unable to contact remote host and unable to save message
3711: for later delivery
3712:
3713: =item *
3714:
3715: error: : an error a occured, a description of the error follows the :
3716:
3717: =item *
3718:
3719: no_such_host : unable to fund a host associated with the user/domain
3720: that was requested
3721:
3722: =back
3723:
3724: =head1 PUBLIC SUBROUTINES
3725:
3726: =head2 Session Environment Functions
3727:
3728: =over 4
3729:
3730: =item *
3731:
3732: appenv(%hash) : the value of %hash is written to the user envirnoment
3733: file, and will be restored for each access this user makes during this
3734: session, also modifies the %ENV for the current process
3735:
3736: =item *
3737:
3738: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3739:
3740: =back
3741:
3742: =head2 User Information
3743:
3744: =over 4
3745:
3746: =item *
3747:
3748: queryauthenticate($uname,$udom) : try to determine user's current
3749: authentication scheme
3750:
3751: =item *
3752:
3753: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3754: servers (first use the current one), $upass should be the users password
3755:
3756: =item *
3757:
3758: homeserver($uname,$udom) : find the server which has the user's
3759: directory and files (there must be only one), this caches the answer,
3760: and also caches if there is a borken connection.
3761:
3762: =item *
3763:
3764: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3765: unique resource in a domain, there must be only 1 ID per username, and
3766: only 1 username per ID in a specific domain) (returns hash:
3767: id=>name,id=>name)
3768:
3769: =item *
3770:
3771: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3772: name=>id,name=>id)
3773:
3774: =item *
3775:
3776: idput($udom,%ids) : store away a list of names and associated IDs
3777:
3778: =item *
3779:
3780: rolesinit($udom,$username,$authhost) : get user privileges
3781:
3782: =item *
3783:
3784: usection($udom,$uname,$cname) : finds the section of student in the
3785: course $cname, return section name/number or '' for "not in course"
3786: and '-1' for "no section"
3787:
3788: =item *
3789:
3790: userenvironment($udom,$uname,@what) : gets the values of the keys
3791: passed in @what from the requested user's environment, returns a hash
3792:
3793: =back
3794:
3795: =head2 User Roles
3796:
3797: =over 4
3798:
3799: =item *
3800:
3801: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
3802: actions
3803: F: full access
3804: U,I,K: authentication modes (cxx only)
3805: '': forbidden
3806: 1: user needs to choose course
3807: 2: browse allowed
3808:
3809: =item *
3810:
3811: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
3812: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
3813: and course level
3814:
3815: =item *
3816:
3817: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
3818: explanation of a user role term
3819:
3820: =back
3821:
3822: =head2 User Modification
3823:
3824: =over 4
3825:
3826: =item *
3827:
3828: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
3829: user for the level given by URL. Optional start and end dates (leave empty
3830: string or zero for "no date")
3831:
3832: =item *
3833:
3834: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
3835: change a users, password, possible return values are: ok,
3836: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
3837: refused
3838:
3839: =item *
3840:
3841: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
3842:
3843: =item *
3844:
3845: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
3846: modify user
3847:
3848: =item *
3849:
3850: modifystudent
3851:
3852: modify a students enrollment and identification information.
3853: The course id is resolved based on the current users environment.
3854: This means the envoking user must be a course coordinator or otherwise
3855: associated with a course.
3856:
3857: This call is essentially a wrapper for lonnet::modifyuser and
3858: lonnet::modify_student_enrollment
3859:
3860: Inputs:
3861:
3862: =over 4
3863:
3864: =item B<$udom> Students loncapa domain
3865:
3866: =item B<$uname> Students loncapa login name
3867:
3868: =item B<$uid> Students id/student number
3869:
3870: =item B<$umode> Students authentication mode
3871:
3872: =item B<$upass> Students password
3873:
3874: =item B<$first> Students first name
3875:
3876: =item B<$middle> Students middle name
3877:
3878: =item B<$last> Students last name
3879:
3880: =item B<$gene> Students generation
3881:
3882: =item B<$usec> Students section in course
3883:
3884: =item B<$end> Unix time of the roles expiration
3885:
3886: =item B<$start> Unix time of the roles start date
3887:
3888: =item B<$forceid> If defined, allow $uid to be changed
3889:
3890: =item B<$desiredhome> server to use as home server for student
3891:
3892: =back
3893:
3894: =item *
3895:
3896: modify_student_enrollment
3897:
3898: Change a students enrollment status in a class. The environment variable
3899: 'role.request.course' must be defined for this function to proceed.
3900:
3901: Inputs:
3902:
3903: =over 4
3904:
3905: =item $udom, students domain
3906:
3907: =item $uname, students name
3908:
3909: =item $uid, students user id
3910:
3911: =item $first, students first name
3912:
3913: =item $middle
3914:
3915: =item $last
3916:
3917: =item $gene
3918:
3919: =item $usec
3920:
3921: =item $end
3922:
3923: =item $start
3924:
3925: =back
3926:
3927:
3928: =item *
3929:
3930: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
3931: custom role; give a custom role to a user for the level given by URL. Specify
3932: name and domain of role author, and role name
3933:
3934: =item *
3935:
3936: revokerole($udom,$uname,$url,$role) : revoke a role for url
3937:
3938: =item *
3939:
3940: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
3941:
3942: =back
3943:
3944: =head2 Course Infomation
3945:
3946: =over 4
3947:
3948: =item *
3949:
3950: coursedescription($courseid) : course description
3951:
3952: =item *
3953:
3954: courseresdata($coursenum,$coursedomain,@which) : request for current
3955: parameter setting for a specific course, @what should be a list of
3956: parameters to ask about. This routine caches answers for 5 minutes.
3957:
3958: =back
3959:
3960: =head2 Course Modification
3961:
3962: =over 4
3963:
3964: =item *
3965:
3966: writecoursepref($courseid,%prefs) : write preferences (environment
3967: database) for a course
3968:
3969: =item *
3970:
3971: createcourse($udom,$description,$url) : make/modify course
3972:
3973: =back
3974:
3975: =head2 Resource Subroutines
3976:
3977: =over 4
3978:
3979: =item *
3980:
3981: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
3982:
3983: =item *
3984:
3985: repcopy($filename) : subscribes to the requested file, and attempts to
3986: replicate from the owning library server, Might return
3987: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
3988: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
3989: resource. Expects the local filesystem pathname
3990: (/home/httpd/html/res/....)
3991:
3992: =back
3993:
3994: =head2 Resource Information
3995:
3996: =over 4
3997:
3998: =item *
3999:
4000: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4001: a vairety of different possible values, $varname should be a request
4002: string, and the other parameters can be used to specify who and what
4003: one is asking about.
4004:
4005: Possible values for $varname are environment.lastname (or other item
4006: from the envirnment hash), user.name (or someother aspect about the
4007: user), resource.0.maxtries (or some other part and parameter of a
4008: resource)
4009:
4010: =item *
4011:
4012: directcondval($number) : get current value of a condition; reads from a state
4013: string
4014:
4015: =item *
4016:
4017: condval($condidx) : value of condition index based on state
4018:
4019: =item *
4020:
4021: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4022: resource's metadata, $what should be either a specific key, or either
4023: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4024: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4025:
4026: this function automatically caches all requests
4027:
4028: =item *
4029:
4030: metadata_query($query,$custom,$customshow) : make a metadata query against the
4031: network of library servers; returns file handle of where SQL and regex results
4032: will be stored for query
4033:
4034: =item *
4035:
4036: symbread($filename) : return symbolic list entry (filename argument optional);
4037: returns the data handle
4038:
4039: =item *
4040:
4041: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4042: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4043: failure, user must be in a course, as it assumes the existance of the
4044: course initi hash, and uses $ENV('request.course.id'}
4045:
4046:
4047: =item *
4048:
4049: symbclean($symb) : removes versions numbers from a symb, returns the
4050: cleaned symb
4051:
4052: =item *
4053:
4054: is_on_map($uri) : checks if the $uri is somewhere on the current
4055: course map, user must be in a course for it to work.
4056:
4057: =item *
4058:
4059: numval($salt) : return random seed value (addend for rndseed)
4060:
4061: =item *
4062:
4063: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4064: a random seed, all arguments are optional, if they aren't sent it uses the
4065: environment to derive them. Note: if symb isn't sent and it can't get one
4066: from &symbread it will use the current time as its return value
4067:
4068: =item *
4069:
4070: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4071: unfakeable, receipt
4072:
4073: =item *
4074:
4075: receipt() : API to ireceipt working off of ENV values; given out to users
4076:
4077: =item *
4078:
4079: countacc($url) : count the number of accesses to a given URL
4080:
4081: =item *
4082:
4083: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4084:
4085: =item *
4086:
4087: checkin($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 $tcrsid)
4088:
4089: =item *
4090:
4091: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4092:
4093: =item *
4094:
4095: devalidate($symb) : devalidate temporary spreadsheet calculations,
4096: forcing spreadsheet to reevaluate the resource scores next time.
4097:
4098: =back
4099:
4100: =head2 Storing/Retreiving Data
4101:
4102: =over 4
4103:
4104: =item *
4105:
4106: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4107: for this url; hashref needs to be given and should be a \%hashname; the
4108: remaining args aren't required and if they aren't passed or are '' they will
4109: be derived from the ENV
4110:
4111: =item *
4112:
4113: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4114: uses critical subroutine
4115:
4116: =item *
4117:
4118: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4119: all args are optional
4120:
4121: =item *
4122:
4123: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4124: works very similar to store/cstore, but all data is stored in a
4125: temporary location and can be reset using tmpreset, $storehash should
4126: be a hash reference, returns nothing on success
4127:
4128: =item *
4129:
4130: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4131: similar to restore, but all data is stored in a temporary location and
4132: can be reset using tmpreset. Returns a hash of values on success,
4133: error string otherwise.
4134:
4135: =item *
4136:
4137: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4138: deltes all keys for $symb form the temporary storage hash.
4139:
4140: =item *
4141:
4142: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4143: reference filled in from namesp ($udom and $uname are optional)
4144:
4145: =item *
4146:
4147: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4148: namesp ($udom and $uname are optional)
4149:
4150: =item *
4151:
4152: dump($namespace,$udom,$uname,$regexp) :
4153: dumps the complete (or key matching regexp) namespace into a hash
4154: ($udom, $uname and $regexp are optional)
4155:
4156: =item *
4157:
4158: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4159: ($udom and $uname are optional)
4160:
4161: =item *
4162:
4163: cput($namespace,$storehash,$udom,$uname) : critical put
4164: ($udom and $uname are optional)
4165:
4166: =item *
4167:
4168: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4169: reference filled in from namesp (encrypts the return communication)
4170: ($udom and $uname are optional)
4171:
4172: =item *
4173:
4174: log($udom,$name,$home,$message) : write to permanent log for user; use
4175: critical subroutine
4176:
4177: =back
4178:
4179: =head2 Network Status Functions
4180:
4181: =over 4
4182:
4183: =item *
4184:
4185: dirlist($uri) : return directory list based on URI
4186:
4187: =item *
4188:
4189: spareserver() : find server with least workload from spare.tab
4190:
4191: =back
4192:
4193: =head2 Apache Request
4194:
4195: =over 4
4196:
4197: =item *
4198:
4199: ssi($url,%hash) : server side include, does a complete request cycle on url to
4200: localhost, posts hash
4201:
4202: =back
4203:
4204: =head2 Data to String to Data
4205:
4206: =over 4
4207:
4208: =item *
4209:
4210: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4211: and '&' separators, supports elements that are arrayrefs and hashrefs
4212:
4213: =item *
4214:
4215: hashref2str($hashref) : convert a hashref into a string complete with
4216: escaping and '=' and '&' separators, supports elements that are
4217: arrayrefs and hashrefs
4218:
4219: =item *
4220:
4221: arrayref2str($arrayref) : convert an arrayref into a string complete
4222: with escaping and '&' separators, supports elements that are arrayrefs
4223: and hashrefs
4224:
4225: =item *
4226:
4227: str2hash($string) : convert string to hash using unescaping and
4228: splitting on '=' and '&', supports elements that are arrayrefs and
4229: hashrefs
4230:
4231: =item *
4232:
4233: str2array($string) : convert string to hash using unescaping and
4234: splitting on '&', supports elements that are arrayrefs and hashrefs
4235:
4236: =back
4237:
4238: =head2 Logging Routines
4239:
4240: =over 4
4241:
4242: These routines allow one to make log messages in the lonnet.log and
4243: lonnet.perm logfiles.
4244:
4245: =item *
4246:
4247: logtouch() : make sure the logfile, lonnet.log, exists
4248:
4249: =item *
4250:
4251: logthis() : append message to the normal lonnet.log file, it gets
4252: preiodically rolled over and deleted.
4253:
4254: =item *
4255:
4256: logperm() : append a permanent message to lonnet.perm.log, this log
4257: file never gets deleted by any automated portion of the system, only
4258: messages of critical importance should go in here.
4259:
4260: =back
4261:
4262: =head2 General File Helper Routines
4263:
4264: =over 4
4265:
4266: =item *
4267:
4268: getfile($file) : returns the entire contents of a file or -1; it
4269: properly subscribes to and replicates the file if neccessary.
4270:
4271: =item *
4272:
4273: filelocation($dir,$file) : returns file system location of a file
4274: based on URI; meant to be "fairly clean" absolute reference, $dir is a
4275: directory that relative $file lookups are to looked in ($dir of /a/dir
4276: and a file of ../bob will become /a/bob)
4277:
4278: =item *
4279:
4280: hreflocation($dir,$file) : returns file system location or a URL; same as
4281: filelocation except for hrefs
4282:
4283: =item *
4284:
4285: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
4286:
4287: =back
4288:
4289: =head2 HTTP Helper Routines
4290:
4291: =over 4
4292:
4293: =item *
4294:
4295: escape() : unpack non-word characters into CGI-compatible hex codes
4296:
4297: =item *
4298:
4299: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
4300:
4301: =back
4302:
4303: =head1 PRIVATE SUBROUTINES
4304:
4305: =head2 Underlying communication routines (Shouldn't call)
4306:
4307: =over 4
4308:
4309: =item *
4310:
4311: subreply() : tries to pass a message to lonc, returns con_lost if incapable
4312:
4313: =item *
4314:
4315: reply() : uses subreply to send a message to remote machine, logs all failures
4316:
4317: =item *
4318:
4319: critical() : passes a critical message to another server; if cannot
4320: get through then place message in connection buffer directory and
4321: returns con_delayed, if incapable of saving message, returns
4322: con_failed
4323:
4324: =item *
4325:
4326: reconlonc() : tries to reconnect lonc client processes.
4327:
4328: =back
4329:
4330: =head2 Resource Access Logging
4331:
4332: =over 4
4333:
4334: =item *
4335:
4336: flushcourselogs() : flush (save) buffer logs and access logs
4337:
4338: =item *
4339:
4340: courselog($what) : save message for course in hash
4341:
4342: =item *
4343:
4344: courseacclog($what) : save message for course using &courselog(). Perform
4345: special processing for specific resource types (problems, exams, quizzes, etc).
4346:
4347: =item *
4348:
4349: goodbye() : flush course logs and log shutting down; it is called in srm.conf
4350: as a PerlChildExitHandler
4351:
4352: =back
4353:
4354: =head2 Other
4355:
4356: =over 4
4357:
4358: =item *
4359:
4360: symblist($mapname,%newhash) : update symbolic storage links
4361:
4362: =back
4363:
4364: =cut
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