File:
[LON-CAPA] /
loncom /
lonnet /
perl /
lonnet.pm
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1.347:
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Sun Mar 23 09:00:51 2003 UTC (21 years, 4 months ago) by
albertel
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- fixes BUG#591, loncreateuser uses the user.priv.cm (cumlative role permissions)
entry existense to guess what courses are available to show, this code was
generating cumulative role entries for roles that had no cm, like ca, thus
one was given the option to create cc roles for normal user accounts
1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.347 2003/03/23 09:00:51 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 3/2 Gerd Kortemeyer
51: # 3/19,3/20 Gerd Kortemeyer
52: # 5/26,5/28 Gerd Kortemeyer
53: # 5/30 H. K. Ng
54: # 6/1 Gerd Kortemeyer
55: # July Guy Albertelli
56: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
57: # 10/2 Gerd Kortemeyer
58: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
59: # 12/5 Matthew Hall
60: # 12/5 Guy Albertelli
61: # 12/6,12/7,12/12 Gerd Kortemeyer
62: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
63: # YEAR=2002
64: # 1/4,2/4,2/7 Gerd Kortemeyer
65: #
66: ###
67:
68: package Apache::lonnet;
69:
70: use strict;
71: use Apache::File;
72: use LWP::UserAgent();
73: use HTTP::Headers;
74: use vars
75: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
76: %libserv %pr %prp %metacache %packagetab %titlecache
77: %courselogs %accesshash $processmarker $dumpcount
78: %coursedombuf %coursehombuf %courseresdatacache
79: %domaindescription %domain_auth_def %domain_auth_arg_def $tmpdir);
80: use IO::Socket;
81: use GDBM_File;
82: use Apache::Constants qw(:common :http);
83: use HTML::LCParser;
84: use Fcntl qw(:flock);
85: use Apache::loncoursedata;
86:
87: my $readit;
88:
89: # --------------------------------------------------------------------- Logging
90:
91: sub logtouch {
92: my $execdir=$perlvar{'lonDaemons'};
93: unless (-e "$execdir/logs/lonnet.log") {
94: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
95: close $fh;
96: }
97: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
98: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
99: }
100:
101: sub logthis {
102: my $message=shift;
103: my $execdir=$perlvar{'lonDaemons'};
104: my $now=time;
105: my $local=localtime($now);
106: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
107: print $fh "$local ($$): $message\n";
108: return 1;
109: }
110:
111: sub logperm {
112: my $message=shift;
113: my $execdir=$perlvar{'lonDaemons'};
114: my $now=time;
115: my $local=localtime($now);
116: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
117: print $fh "$now:$message:$local\n";
118: return 1;
119: }
120:
121: # -------------------------------------------------- Non-critical communication
122: sub subreply {
123: my ($cmd,$server)=@_;
124: my $peerfile="$perlvar{'lonSockDir'}/$server";
125: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
126: Type => SOCK_STREAM,
127: Timeout => 10)
128: or return "con_lost";
129: print $client "$cmd\n";
130: my $answer=<$client>;
131: if (!$answer) { $answer="con_lost"; }
132: chomp($answer);
133: return $answer;
134: }
135:
136: sub reply {
137: my ($cmd,$server)=@_;
138: unless (defined($hostname{$server})) { return 'no_such_host'; }
139: my $answer=subreply($cmd,$server);
140: if ($answer eq 'con_lost') {
141: #sleep 5;
142: #$answer=subreply($cmd,$server);
143: #if ($answer eq 'con_lost') {
144: # &logthis("Second attempt con_lost on $server");
145: # my $peerfile="$perlvar{'lonSockDir'}/$server";
146: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
147: # Type => SOCK_STREAM,
148: # Timeout => 10)
149: # or return "con_lost";
150: # &logthis("Killing socket");
151: # print $client "close_connection_exit\n";
152: #sleep 5;
153: # $answer=subreply($cmd,$server);
154: #}
155: }
156: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
157: &logthis("<font color=blue>WARNING:".
158: " $cmd to $server returned $answer</font>");
159: }
160: return $answer;
161: }
162:
163: # ----------------------------------------------------------- Send USR1 to lonc
164:
165: sub reconlonc {
166: my $peerfile=shift;
167: &logthis("Trying to reconnect for $peerfile");
168: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
169: if (my $fh=Apache::File->new("$loncfile")) {
170: my $loncpid=<$fh>;
171: chomp($loncpid);
172: if (kill 0 => $loncpid) {
173: &logthis("lonc at pid $loncpid responding, sending USR1");
174: kill USR1 => $loncpid;
175: sleep 1;
176: if (-e "$peerfile") { return; }
177: &logthis("$peerfile still not there, give it another try");
178: sleep 5;
179: if (-e "$peerfile") { return; }
180: &logthis(
181: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
182: } else {
183: &logthis(
184: "<font color=blue>WARNING:".
185: " lonc at pid $loncpid not responding, giving up</font>");
186: }
187: } else {
188: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
189: }
190: }
191:
192: # ------------------------------------------------------ Critical communication
193:
194: sub critical {
195: my ($cmd,$server)=@_;
196: unless ($hostname{$server}) {
197: &logthis("<font color=blue>WARNING:".
198: " Critical message to unknown server ($server)</font>");
199: return 'no_such_host';
200: }
201: my $answer=reply($cmd,$server);
202: if ($answer eq 'con_lost') {
203: my $pingreply=reply('ping',$server);
204: &reconlonc("$perlvar{'lonSockDir'}/$server");
205: my $pongreply=reply('pong',$server);
206: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
207: $answer=reply($cmd,$server);
208: if ($answer eq 'con_lost') {
209: my $now=time;
210: my $middlename=$cmd;
211: $middlename=substr($middlename,0,16);
212: $middlename=~s/\W//g;
213: my $dfilename=
214: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
215: $dumpcount++;
216: {
217: my $dfh;
218: if ($dfh=Apache::File->new(">$dfilename")) {
219: print $dfh "$cmd\n";
220: }
221: }
222: sleep 2;
223: my $wcmd='';
224: {
225: my $dfh;
226: if ($dfh=Apache::File->new("$dfilename")) {
227: $wcmd=<$dfh>;
228: }
229: }
230: chomp($wcmd);
231: if ($wcmd eq $cmd) {
232: &logthis("<font color=blue>WARNING: ".
233: "Connection buffer $dfilename: $cmd</font>");
234: &logperm("D:$server:$cmd");
235: return 'con_delayed';
236: } else {
237: &logthis("<font color=red>CRITICAL:"
238: ." Critical connection failed: $server $cmd</font>");
239: &logperm("F:$server:$cmd");
240: return 'con_failed';
241: }
242: }
243: }
244: return $answer;
245: }
246:
247: # ---------------------------------------------------------- Append Environment
248:
249: sub appenv {
250: my %newenv=@_;
251: foreach (keys %newenv) {
252: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
253: &logthis("<font color=blue>WARNING: ".
254: "Attempt to modify environment ".$_." to ".$newenv{$_}
255: .'</font>');
256: delete($newenv{$_});
257: } else {
258: $ENV{$_}=$newenv{$_};
259: }
260: }
261:
262: my $lockfh;
263: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
264: return 'error: '.$!;
265: }
266: unless (flock($lockfh,LOCK_EX)) {
267: &logthis("<font color=blue>WARNING: ".
268: 'Could not obtain exclusive lock in appenv: '.$!);
269: $lockfh->close();
270: return 'error: '.$!;
271: }
272:
273: my @oldenv;
274: {
275: my $fh;
276: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
277: return 'error: '.$!;
278: }
279: @oldenv=<$fh>;
280: $fh->close();
281: }
282: for (my $i=0; $i<=$#oldenv; $i++) {
283: chomp($oldenv[$i]);
284: if ($oldenv[$i] ne '') {
285: my ($name,$value)=split(/=/,$oldenv[$i]);
286: unless (defined($newenv{$name})) {
287: $newenv{$name}=$value;
288: }
289: }
290: }
291: {
292: my $fh;
293: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
294: return 'error';
295: }
296: my $newname;
297: foreach $newname (keys %newenv) {
298: print $fh "$newname=$newenv{$newname}\n";
299: }
300: $fh->close();
301: }
302:
303: $lockfh->close();
304: return 'ok';
305: }
306: # ----------------------------------------------------- Delete from Environment
307:
308: sub delenv {
309: my $delthis=shift;
310: my %newenv=();
311: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
312: &logthis("<font color=blue>WARNING: ".
313: "Attempt to delete from environment ".$delthis);
314: return 'error';
315: }
316: my @oldenv;
317: {
318: my $fh;
319: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
320: return 'error';
321: }
322: unless (flock($fh,LOCK_SH)) {
323: &logthis("<font color=blue>WARNING: ".
324: 'Could not obtain shared lock in delenv: '.$!);
325: $fh->close();
326: return 'error: '.$!;
327: }
328: @oldenv=<$fh>;
329: $fh->close();
330: }
331: {
332: my $fh;
333: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
334: return 'error';
335: }
336: unless (flock($fh,LOCK_EX)) {
337: &logthis("<font color=blue>WARNING: ".
338: 'Could not obtain exclusive lock in delenv: '.$!);
339: $fh->close();
340: return 'error: '.$!;
341: }
342: foreach (@oldenv) {
343: unless ($_=~/^$delthis/) { print $fh $_; }
344: }
345: $fh->close();
346: }
347: return 'ok';
348: }
349:
350: # ------------------------------------------ Fight off request when overloaded
351:
352: sub overloaderror {
353: my ($r,$checkserver)=@_;
354: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
355: my $loadavg;
356: if ($checkserver eq $perlvar{'lonHostID'}) {
357: my $loadfile=Apache::File->new('/proc/loadavg');
358: $loadavg=<$loadfile>;
359: $loadavg =~ s/\s.*//g;
360: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
361: } else {
362: $loadavg=&reply('load',$checkserver);
363: }
364: my $overload=$loadavg-100;
365: if ($overload>0) {
366: $r->err_headers_out->{'Retry-After'}=$overload;
367: $r->log_error('Overload of '.$overload.' on '.$checkserver);
368: return 413;
369: }
370: return '';
371: }
372:
373: # ------------------------------ Find server with least workload from spare.tab
374:
375: sub spareserver {
376: my $loadpercent = shift;
377: my $tryserver;
378: my $spareserver='';
379: my $lowestserver=$loadpercent;
380: foreach $tryserver (keys %spareid) {
381: my $answer=reply('load',$tryserver);
382: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
383: $spareserver="http://$hostname{$tryserver}";
384: $lowestserver=$answer;
385: }
386: }
387: return $spareserver;
388: }
389:
390: # --------------------------------------------- Try to change a user's password
391:
392: sub changepass {
393: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
394: $currentpass = &escape($currentpass);
395: $newpass = &escape($newpass);
396: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
397: $server);
398: if (! $answer) {
399: &logthis("No reply on password change request to $server ".
400: "by $uname in domain $udom.");
401: } elsif ($answer =~ "^ok") {
402: &logthis("$uname in $udom successfully changed their password ".
403: "on $server.");
404: } elsif ($answer =~ "^pwchange_failure") {
405: &logthis("$uname in $udom was unable to change their password ".
406: "on $server. The action was blocked by either lcpasswd ".
407: "or pwchange");
408: } elsif ($answer =~ "^non_authorized") {
409: &logthis("$uname in $udom did not get their password correct when ".
410: "attempting to change it on $server.");
411: } elsif ($answer =~ "^auth_mode_error") {
412: &logthis("$uname in $udom attempted to change their password despite ".
413: "not being locally or internally authenticated on $server.");
414: } elsif ($answer =~ "^unknown_user") {
415: &logthis("$uname in $udom attempted to change their password ".
416: "on $server but were unable to because $server is not ".
417: "their home server.");
418: } elsif ($answer =~ "^refused") {
419: &logthis("$server refused to change $uname in $udom password because ".
420: "it was sent an unencrypted request to change the password.");
421: }
422: return $answer;
423: }
424:
425: # ----------------------- Try to determine user's current authentication scheme
426:
427: sub queryauthenticate {
428: my ($uname,$udom)=@_;
429: if (($perlvar{'lonRole'} eq 'library') &&
430: ($udom eq $perlvar{'lonDefDomain'})) {
431: my $answer=reply("encrypt:currentauth:$udom:$uname",
432: $perlvar{'lonHostID'});
433: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
434: if (length($answer)) {
435: return $answer;
436: }
437: else {
438: &logthis("User $uname at $udom lacks an authentication mechanism");
439: return 'no_host';
440: }
441: }
442: }
443:
444: my $tryserver;
445: foreach $tryserver (keys %libserv) {
446: if ($hostdom{$tryserver} eq $udom) {
447: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
448: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
449: if (length($answer)) {
450: return $answer;
451: }
452: else {
453: &logthis("User $uname at $udom lacks an authentication mechanism");
454: return 'no_host';
455: }
456: }
457: }
458: }
459: &logthis("User $uname at $udom lacks an authentication mechanism");
460: return 'no_host';
461: }
462:
463: # --------- Try to authenticate user from domain's lib servers (first this one)
464:
465: sub authenticate {
466: my ($uname,$upass,$udom)=@_;
467: $upass=escape($upass);
468: $uname=~s/\W//g;
469: if (($perlvar{'lonRole'} eq 'library') &&
470: ($udom eq $perlvar{'lonDefDomain'})) {
471: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
472: if ($answer =~ /authorized/) {
473: if ($answer eq 'authorized') {
474: &logthis("User $uname at $udom authorized by local server");
475: return $perlvar{'lonHostID'};
476: }
477: if ($answer eq 'non_authorized') {
478: &logthis("User $uname at $udom rejected by local server");
479: return 'no_host';
480: }
481: }
482: }
483:
484: my $tryserver;
485: foreach $tryserver (keys %libserv) {
486: if ($hostdom{$tryserver} eq $udom) {
487: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
488: if ($answer =~ /authorized/) {
489: if ($answer eq 'authorized') {
490: &logthis("User $uname at $udom authorized by $tryserver");
491: return $tryserver;
492: }
493: if ($answer eq 'non_authorized') {
494: &logthis("User $uname at $udom rejected by $tryserver");
495: return 'no_host';
496: }
497: }
498: }
499: }
500: &logthis("User $uname at $udom could not be authenticated");
501: return 'no_host';
502: }
503:
504: # ---------------------- Find the homebase for a user from domain's lib servers
505:
506: sub homeserver {
507: my ($uname,$udom,$ignoreBadCache)=@_;
508: my $index="$uname:$udom";
509: if ($homecache{$index}) {
510: return "$homecache{$index}";
511: }
512: my $tryserver;
513: foreach $tryserver (keys %libserv) {
514: next if ($ignoreBadCache ne 'true' &&
515: exists($badServerCache{$tryserver}));
516: if ($hostdom{$tryserver} eq $udom) {
517: my $answer=reply("home:$udom:$uname",$tryserver);
518: if ($answer eq 'found') {
519: $homecache{$index}=$tryserver;
520: return $tryserver;
521: } elsif ($answer eq 'no_host') {
522: $badServerCache{$tryserver}=1;
523: }
524: }
525: }
526: return 'no_host';
527: }
528:
529: # ------------------------------------- Find the usernames behind a list of IDs
530:
531: sub idget {
532: my ($udom,@ids)=@_;
533: my %returnhash=();
534:
535: my $tryserver;
536: foreach $tryserver (keys %libserv) {
537: if ($hostdom{$tryserver} eq $udom) {
538: my $idlist=join('&',@ids);
539: $idlist=~tr/A-Z/a-z/;
540: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
541: my @answer=();
542: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
543: @answer=split(/\&/,$reply);
544: } ;
545: my $i;
546: for ($i=0;$i<=$#ids;$i++) {
547: if ($answer[$i]) {
548: $returnhash{$ids[$i]}=$answer[$i];
549: }
550: }
551: }
552: }
553: return %returnhash;
554: }
555:
556: # ------------------------------------- Find the IDs behind a list of usernames
557:
558: sub idrget {
559: my ($udom,@unames)=@_;
560: my %returnhash=();
561: foreach (@unames) {
562: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
563: }
564: return %returnhash;
565: }
566:
567: # ------------------------------- Store away a list of names and associated IDs
568:
569: sub idput {
570: my ($udom,%ids)=@_;
571: my %servers=();
572: foreach (keys %ids) {
573: my $uhom=&homeserver($_,$udom);
574: if ($uhom ne 'no_host') {
575: my $id=&escape($ids{$_});
576: $id=~tr/A-Z/a-z/;
577: my $unam=&escape($_);
578: if ($servers{$uhom}) {
579: $servers{$uhom}.='&'.$id.'='.$unam;
580: } else {
581: $servers{$uhom}=$id.'='.$unam;
582: }
583: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
584: }
585: }
586: foreach (keys %servers) {
587: &critical('idput:'.$udom.':'.$servers{$_},$_);
588: }
589: }
590:
591: # --------------------------------------------------- Assign a key to a student
592:
593: sub assign_access_key {
594: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
595: $cdom=
596: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
597: $cnum=
598: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
599: $udom=$ENV{'user.name'} unless (defined($udom));
600: $uname=$ENV{'user.domain'} unless (defined($uname));
601: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
602: if (($existing{$ckey}=~/^\d+$/) || # has time - new key
603: ($existing{$ckey} eq $udom.':'.$uname)) { # this should not happen,
604: # unless something went wrong
605: # the first time around
606: # ready to assign
607: } elsif (!$existing{$ckey}) {
608: if (&put('accesskey',{$ckey=>$udom.':'.$uname},$cdom,$cnum) eq 'ok') {
609: # key now belongs to user
610: my $envkey='key.'.$cdom.'_'.$cnum;
611: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
612: &appenv('environment.'.$envkey => $ckey);
613: return 'ok';
614: } else {
615: return
616: 'error: Count not permanently assign key, will need to be re-entered later.';
617: }
618: } else {
619: return 'error: Could not assign key, try again later.';
620: }
621: # the key does not exist
622: return 'error: The key does not exist';
623: } else {
624: # the key is somebody else's
625: return 'error: The key is already in use';
626: }
627: }
628:
629: # ------------------------------------------------------ Generate a set of keys
630:
631: sub generate_access_keys {
632: my ($number,$cdom,$cnum)=@_;
633: $cdom=
634: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
635: $cnum=
636: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
637: unless (&allowed('ccc',$cdom)) { return 0; }
638: unless (($cdom) && ($cnum)) { return 0; }
639: if ($number>10000) { return 0; }
640: sleep(2); # make sure don't get same seed twice
641: srand(time()^($$+($$<<15))); # from "Programming Perl"
642: my $total=0;
643: for (my $i=1;$i<=$number;$i++) {
644: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
645: sprintf("%lx",int(100000*rand)).'-'.
646: sprintf("%lx",int(100000*rand));
647: $newkey=~s/1/g/g; # folks mix up 1 and l
648: $newkey=~s/0/h/g; # and also 0 and O
649: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
650: if ($existing{$newkey}) {
651: $i--;
652: } else {
653: if (&put('accesskeys',{ $newkey => time() },$cdom,$cnum) eq 'ok') {
654: $total++;
655: }
656: }
657: }
658: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
659: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
660: return $total;
661: }
662:
663: # ------------------------------------------------------- Validate an accesskey
664:
665: sub validate_access_key {
666: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
667: $cdom=
668: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
669: $cnum=
670: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
671: $udom=$ENV{'user.name'} unless (defined($udom));
672: $uname=$ENV{'user.domain'} unless (defined($uname));
673: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
674: return ($existing{$ckey} eq $udom.':'.$uname);
675: }
676:
677: # ------------------------------------- Find the section of student in a course
678:
679: sub getsection {
680: my ($udom,$unam,$courseid)=@_;
681: $courseid=~s/\_/\//g;
682: $courseid=~s/^(\w)/\/$1/;
683: my %Pending;
684: my %Expired;
685: #
686: # Each role can either have not started yet (pending), be active,
687: # or have expired.
688: #
689: # If there is an active role, we are done.
690: #
691: # If there is more than one role which has not started yet,
692: # choose the one which will start sooner
693: # If there is one role which has not started yet, return it.
694: #
695: # If there is more than one expired role, choose the one which ended last.
696: # If there is a role which has expired, return it.
697: #
698: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
699: &homeserver($unam,$udom)))) {
700: my ($key,$value)=split(/\=/,$_);
701: $key=&unescape($key);
702: next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
703: my $section=$1;
704: if ($key eq $courseid.'_st') { $section=''; }
705: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
706: my $now=time;
707: if (defined($end) && ($now > $end)) {
708: $Expired{$end}=$section;
709: next;
710: }
711: if (defined($start) && ($now < $start)) {
712: $Pending{$start}=$section;
713: next;
714: }
715: return $section;
716: }
717: #
718: # Presumedly there will be few matching roles from the above
719: # loop and the sorting time will be negligible.
720: if (scalar(keys(%Pending))) {
721: my ($time) = sort {$a <=> $b} keys(%Pending);
722: return $Pending{$time};
723: }
724: if (scalar(keys(%Expired))) {
725: my @sorted = sort {$a <=> $b} keys(%Expired);
726: my $time = pop(@sorted);
727: return $Expired{$time};
728: }
729: return '-1';
730: }
731:
732: sub usection {
733: my ($udom,$unam,$courseid)=@_;
734: $courseid=~s/\_/\//g;
735: $courseid=~s/^(\w)/\/$1/;
736: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
737: &homeserver($unam,$udom)))) {
738: my ($key,$value)=split(/\=/,$_);
739: $key=&unescape($key);
740: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
741: my $section=$1;
742: if ($key eq $courseid.'_st') { $section=''; }
743: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
744: my $now=time;
745: my $notactive=0;
746: if ($start) {
747: if ($now<$start) { $notactive=1; }
748: }
749: if ($end) {
750: if ($now>$end) { $notactive=1; }
751: }
752: unless ($notactive) { return $section; }
753: }
754: }
755: return '-1';
756: }
757:
758: # ------------------------------------- Read an entry from a user's environment
759:
760: sub userenvironment {
761: my ($udom,$unam,@what)=@_;
762: my %returnhash=();
763: my @answer=split(/\&/,
764: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
765: &homeserver($unam,$udom)));
766: my $i;
767: for ($i=0;$i<=$#what;$i++) {
768: $returnhash{$what[$i]}=&unescape($answer[$i]);
769: }
770: return %returnhash;
771: }
772:
773: # -------------------------------------------------------------------- New chat
774:
775: sub chatsend {
776: my ($newentry,$anon)=@_;
777: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
778: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
779: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
780: &reply('chatsend:'.$cdom.':'.$cnum.':'.
781: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
782: &escape($newentry)),$chome);
783: }
784:
785: # ------------------------------------------ Find current version of a resource
786:
787: sub getversion {
788: my $fname=&clutter(shift);
789: unless ($fname=~/^\/res\//) { return -1; }
790: return ¤tversion(&filelocation('',$fname));
791: }
792:
793: sub currentversion {
794: my $fname=shift;
795: my $author=$fname;
796: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
797: my ($udom,$uname)=split(/\//,$author);
798: my $home=homeserver($uname,$udom);
799: if ($home eq 'no_host') {
800: return -1;
801: }
802: my $answer=reply("currentversion:$fname",$home);
803: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
804: return -1;
805: }
806: return $answer;
807: }
808:
809: # ----------------------------- Subscribe to a resource, return URL if possible
810:
811: sub subscribe {
812: my $fname=shift;
813: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
814: my $author=$fname;
815: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
816: my ($udom,$uname)=split(/\//,$author);
817: my $home=homeserver($uname,$udom);
818: if ($home eq 'no_host') {
819: return 'not_found';
820: }
821: my $answer=reply("sub:$fname",$home);
822: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
823: $answer.=' by '.$home;
824: }
825: return $answer;
826: }
827:
828: # -------------------------------------------------------------- Replicate file
829:
830: sub repcopy {
831: my $filename=shift;
832: $filename=~s/\/+/\//g;
833: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
834: my $transname="$filename.in.transfer";
835: if ((-e $filename) || (-e $transname)) { return OK; }
836: my $remoteurl=subscribe($filename);
837: if ($remoteurl =~ /^con_lost by/) {
838: &logthis("Subscribe returned $remoteurl: $filename");
839: return HTTP_SERVICE_UNAVAILABLE;
840: } elsif ($remoteurl eq 'not_found') {
841: &logthis("Subscribe returned not_found: $filename");
842: return HTTP_NOT_FOUND;
843: } elsif ($remoteurl =~ /^rejected by/) {
844: &logthis("Subscribe returned $remoteurl: $filename");
845: return FORBIDDEN;
846: } elsif ($remoteurl eq 'directory') {
847: return OK;
848: } else {
849: my $author=$filename;
850: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
851: my ($udom,$uname)=split(/\//,$author);
852: my $home=homeserver($uname,$udom);
853: unless ($home eq $perlvar{'lonHostID'}) {
854: my @parts=split(/\//,$filename);
855: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
856: if ($path ne "$perlvar{'lonDocRoot'}/res") {
857: &logthis("Malconfiguration for replication: $filename");
858: return HTTP_BAD_REQUEST;
859: }
860: my $count;
861: for ($count=5;$count<$#parts;$count++) {
862: $path.="/$parts[$count]";
863: if ((-e $path)!=1) {
864: mkdir($path,0777);
865: }
866: }
867: my $ua=new LWP::UserAgent;
868: my $request=new HTTP::Request('GET',"$remoteurl");
869: my $response=$ua->request($request,$transname);
870: if ($response->is_error()) {
871: unlink($transname);
872: my $message=$response->status_line;
873: &logthis("<font color=blue>WARNING:"
874: ." LWP get: $message: $filename</font>");
875: return HTTP_SERVICE_UNAVAILABLE;
876: } else {
877: if ($remoteurl!~/\.meta$/) {
878: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
879: my $mresponse=$ua->request($mrequest,$filename.'.meta');
880: if ($mresponse->is_error()) {
881: unlink($filename.'.meta');
882: &logthis(
883: "<font color=yellow>INFO: No metadata: $filename</font>");
884: }
885: }
886: rename($transname,$filename);
887: return OK;
888: }
889: }
890: }
891: }
892:
893: # ------------------------------------------------ Get server side include body
894: sub ssi_body {
895: my $filelink=shift;
896: my $output=($filelink=~/^http\:/?&externalssi($filelink):
897: &ssi($filelink));
898: $output=~s/^.*\<body[^\>]*\>//si;
899: $output=~s/\<\/body\s*\>.*$//si;
900: $output=~
901: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
902: return $output;
903: }
904:
905: # --------------------------------------------------------- Server Side Include
906:
907: sub ssi {
908:
909: my ($fn,%form)=@_;
910:
911: my $ua=new LWP::UserAgent;
912:
913: my $request;
914:
915: if (%form) {
916: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
917: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
918: } else {
919: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
920: }
921:
922: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
923: my $response=$ua->request($request);
924:
925: return $response->content;
926: }
927:
928: sub externalssi {
929: my ($url)=@_;
930: my $ua=new LWP::UserAgent;
931: my $request=new HTTP::Request('GET',$url);
932: my $response=$ua->request($request);
933: return $response->content;
934: }
935:
936: # ------- Add a token to a remote URI's query string to vouch for access rights
937:
938: sub tokenwrapper {
939: my $uri=shift;
940: $uri=~s/^http\:\/\/([^\/]+)//;
941: $uri=~s/^\///;
942: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
943: my $token=$1;
944: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
945: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
946: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
947: (($uri=~/\?/)?'&':'?').'token='.$token.
948: '&tokenissued='.$perlvar{'lonHostID'};
949: } else {
950: return '/adm/notfound.html';
951: }
952: }
953:
954: # --------------- Take an uploaded file and put it into the userfiles directory
955: # input: name of form element, coursedoc=1 means this is for the course
956: # output: url of file in userspace
957:
958: sub userfileupload {
959: my ($formname,$coursedoc)=@_;
960: my $fname=$ENV{'form.'.$formname.'.filename'};
961: # Replace Windows backslashes by forward slashes
962: $fname=~s/\\/\//g;
963: # Get rid of everything but the actual filename
964: $fname=~s/^.*\/([^\/]+)$/$1/;
965: # Replace spaces by underscores
966: $fname=~s/\s+/\_/g;
967: # Replace all other weird characters by nothing
968: $fname=~s/[^\w\.\-]//g;
969: # See if there is anything left
970: unless ($fname) { return 'error: no uploaded file'; }
971: chop($ENV{'form.'.$formname});
972: # Create the directory if not present
973: my $docuname='';
974: my $docudom='';
975: my $docuhome='';
976: if ($coursedoc) {
977: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
978: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
979: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
980: } else {
981: $docuname=$ENV{'user.name'};
982: $docudom=$ENV{'user.domain'};
983: $docuhome=$ENV{'user.home'};
984: }
985: return
986: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
987: }
988:
989: sub finishuserfileupload {
990: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
991: my $path=$docudom.'/'.$docuname.'/';
992: my $filepath=$perlvar{'lonDocRoot'};
993: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
994: my $count;
995: for ($count=4;$count<=$#parts;$count++) {
996: $filepath.="/$parts[$count]";
997: if ((-e $filepath)!=1) {
998: mkdir($filepath,0777);
999: }
1000: }
1001: # Save the file
1002: {
1003: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
1004: print $fh $ENV{'form.'.$formname};
1005: }
1006: # Notify homeserver to grep it
1007: #
1008:
1009: my $fetchresult=
1010: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
1011: if ($fetchresult eq 'ok') {
1012: #
1013: # Return the URL to it
1014: return '/uploaded/'.$path.$fname;
1015: } else {
1016: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1017: ' to host '.$docuhome.': '.$fetchresult);
1018: return '/adm/notfound.html';
1019: }
1020: }
1021:
1022: # ------------------------------------------------------------------------- Log
1023:
1024: sub log {
1025: my ($dom,$nam,$hom,$what)=@_;
1026: return critical("log:$dom:$nam:$what",$hom);
1027: }
1028:
1029: # ------------------------------------------------------------------ Course Log
1030:
1031: sub flushcourselogs {
1032: &logthis('Flushing course log buffers');
1033: foreach (keys %courselogs) {
1034: my $crsid=$_;
1035: if (&reply('log:'.$coursedombuf{$crsid}.':'.
1036: &escape($courselogs{$crsid}),
1037: $coursehombuf{$crsid}) eq 'ok') {
1038: delete $courselogs{$crsid};
1039: } else {
1040: &logthis('Failed to flush log buffer for '.$crsid);
1041: if (length($courselogs{$crsid})>40000) {
1042: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1043: " exceeded maximum size, deleting.</font>");
1044: delete $courselogs{$crsid};
1045: }
1046: }
1047: }
1048: &logthis('Flushing access logs');
1049: foreach (keys %accesshash) {
1050: my $entry=$_;
1051: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
1052: my %temphash=($entry => $accesshash{$entry});
1053: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
1054: delete $accesshash{$entry};
1055: }
1056: }
1057: $dumpcount++;
1058: }
1059:
1060: sub courselog {
1061: my $what=shift;
1062: $what=time.':'.$what;
1063: unless ($ENV{'request.course.id'}) { return ''; }
1064: $coursedombuf{$ENV{'request.course.id'}}=
1065: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1066: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1067: $coursehombuf{$ENV{'request.course.id'}}=
1068: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1069: if (defined $courselogs{$ENV{'request.course.id'}}) {
1070: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1071: } else {
1072: $courselogs{$ENV{'request.course.id'}}.=$what;
1073: }
1074: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1075: &flushcourselogs();
1076: }
1077: }
1078:
1079: sub courseacclog {
1080: my $fnsymb=shift;
1081: unless ($ENV{'request.course.id'}) { return ''; }
1082: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1083: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
1084: $what.=':POST';
1085: foreach (keys %ENV) {
1086: if ($_=~/^form\.(.*)/) {
1087: $what.=':'.$1.'='.$ENV{$_};
1088: }
1089: }
1090: }
1091: &courselog($what);
1092: }
1093:
1094: sub countacc {
1095: my $url=&declutter(shift);
1096: unless ($ENV{'request.course.id'}) { return ''; }
1097: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1098: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1099: if (defined($accesshash{$key})) {
1100: $accesshash{$key}++;
1101: } else {
1102: $accesshash{$key}=1;
1103: }
1104: }
1105:
1106: # ----------------------------------------------------------- Check out an item
1107:
1108: sub checkout {
1109: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1110: my $now=time;
1111: my $lonhost=$perlvar{'lonHostID'};
1112: my $infostr=&escape(
1113: 'CHECKOUTTOKEN&'.
1114: $tuname.'&'.
1115: $tudom.'&'.
1116: $tcrsid.'&'.
1117: $symb.'&'.
1118: $now.'&'.$ENV{'REMOTE_ADDR'});
1119: my $token=&reply('tmpput:'.$infostr,$lonhost);
1120: if ($token=~/^error\:/) {
1121: &logthis("<font color=blue>WARNING: ".
1122: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1123: "</font>");
1124: return '';
1125: }
1126:
1127: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1128: $token=~tr/a-z/A-Z/;
1129:
1130: my %infohash=('resource.0.outtoken' => $token,
1131: 'resource.0.checkouttime' => $now,
1132: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1133:
1134: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1135: return '';
1136: } else {
1137: &logthis("<font color=blue>WARNING: ".
1138: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1139: "</font>");
1140: }
1141:
1142: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1143: &escape('Checkout '.$infostr.' - '.
1144: $token)) ne 'ok') {
1145: return '';
1146: } else {
1147: &logthis("<font color=blue>WARNING: ".
1148: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1149: "</font>");
1150: }
1151: return $token;
1152: }
1153:
1154: # ------------------------------------------------------------ Check in an item
1155:
1156: sub checkin {
1157: my $token=shift;
1158: my $now=time;
1159: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1160: $lonhost=~tr/A-Z/a-z/;
1161: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1162: $dtoken=~s/\W/\_/g;
1163: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1164: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1165:
1166: unless (($tuname) && ($tudom)) {
1167: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1168: return '';
1169: }
1170:
1171: unless (&allowed('mgr',$tcrsid)) {
1172: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1173: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1174: return '';
1175: }
1176:
1177: my %infohash=('resource.0.intoken' => $token,
1178: 'resource.0.checkintime' => $now,
1179: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1180:
1181: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1182: return '';
1183: }
1184:
1185: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1186: &escape('Checkin - '.$token)) ne 'ok') {
1187: return '';
1188: }
1189:
1190: return ($symb,$tuname,$tudom,$tcrsid);
1191: }
1192:
1193: # --------------------------------------------- Set Expire Date for Spreadsheet
1194:
1195: sub expirespread {
1196: my ($uname,$udom,$stype,$usymb)=@_;
1197: my $cid=$ENV{'request.course.id'};
1198: if ($cid) {
1199: my $now=time;
1200: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1201: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1202: $ENV{'course.'.$cid.'.num'}.
1203: ':nohist_expirationdates:'.
1204: &escape($key).'='.$now,
1205: $ENV{'course.'.$cid.'.home'})
1206: }
1207: return 'ok';
1208: }
1209:
1210: # ----------------------------------------------------- Devalidate Spreadsheets
1211:
1212: sub devalidate {
1213: my ($symb,$uname,$udom)=@_;
1214: my $cid=$ENV{'request.course.id'};
1215: if ($cid) {
1216: # delete the stored spreadsheets for
1217: # - the student level sheet of this user in course's homespace
1218: # - the assessment level sheet for this resource
1219: # for this user in user's homespace
1220: my $key=$uname.':'.$udom.':';
1221: my $status=
1222: &del('nohist_calculatedsheets',
1223: [$key.'studentcalc'],
1224: $ENV{'course.'.$cid.'.domain'},
1225: $ENV{'course.'.$cid.'.num'})
1226: .' '.
1227: &del('nohist_calculatedsheets_'.$cid,
1228: [$key.'assesscalc:'.$symb]);
1229: unless ($status eq 'ok ok') {
1230: &logthis('Could not devalidate spreadsheet '.
1231: $uname.' at '.$udom.' for '.
1232: $symb.': '.$status);
1233: }
1234: }
1235: }
1236:
1237: sub get_scalar {
1238: my ($string,$end) = @_;
1239: my $value;
1240: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1241: $value = $1;
1242: } elsif ($$string =~ s/^([^&]*?)&//) {
1243: $value = $1;
1244: }
1245: return &unescape($value);
1246: }
1247:
1248: sub array2str {
1249: my (@array) = @_;
1250: my $result=&arrayref2str(\@array);
1251: $result=~s/^__ARRAY_REF__//;
1252: $result=~s/__END_ARRAY_REF__$//;
1253: return $result;
1254: }
1255:
1256: sub arrayref2str {
1257: my ($arrayref) = @_;
1258: my $result='__ARRAY_REF__';
1259: foreach my $elem (@$arrayref) {
1260: if(ref($elem) eq 'ARRAY') {
1261: $result.=&arrayref2str($elem).'&';
1262: } elsif(ref($elem) eq 'HASH') {
1263: $result.=&hashref2str($elem).'&';
1264: } elsif(ref($elem)) {
1265: #print("Got a ref of ".(ref($elem))." skipping.");
1266: } else {
1267: $result.=&escape($elem).'&';
1268: }
1269: }
1270: $result=~s/\&$//;
1271: $result .= '__END_ARRAY_REF__';
1272: return $result;
1273: }
1274:
1275: sub hash2str {
1276: my (%hash) = @_;
1277: my $result=&hashref2str(\%hash);
1278: $result=~s/^__HASH_REF__//;
1279: $result=~s/__END_HASH_REF__$//;
1280: return $result;
1281: }
1282:
1283: sub hashref2str {
1284: my ($hashref)=@_;
1285: my $result='__HASH_REF__';
1286: foreach (keys(%$hashref)) {
1287: if (ref($_) eq 'ARRAY') {
1288: $result.=&arrayref2str($_).'=';
1289: } elsif (ref($_) eq 'HASH') {
1290: $result.=&hashref2str($_).'=';
1291: } elsif (ref($_)) {
1292: $result.='=';
1293: #print("Got a ref of ".(ref($_))." skipping.");
1294: } else {
1295: if ($_) {$result.=&escape($_).'=';} else { last; }
1296: }
1297:
1298: if(ref($hashref->{$_}) eq 'ARRAY') {
1299: $result.=&arrayref2str($hashref->{$_}).'&';
1300: } elsif(ref($hashref->{$_}) eq 'HASH') {
1301: $result.=&hashref2str($hashref->{$_}).'&';
1302: } elsif(ref($hashref->{$_})) {
1303: $result.='&';
1304: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1305: } else {
1306: $result.=&escape($hashref->{$_}).'&';
1307: }
1308: }
1309: $result=~s/\&$//;
1310: $result .= '__END_HASH_REF__';
1311: return $result;
1312: }
1313:
1314: sub str2hash {
1315: my ($string)=@_;
1316: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1317: return %$hash;
1318: }
1319:
1320: sub str2hashref {
1321: my ($string) = @_;
1322:
1323: my %hash;
1324:
1325: if($string !~ /^__HASH_REF__/) {
1326: if (! ($string eq '' || !defined($string))) {
1327: $hash{'error'}='Not hash reference';
1328: }
1329: return (\%hash, $string);
1330: }
1331:
1332: $string =~ s/^__HASH_REF__//;
1333:
1334: while($string !~ /^__END_HASH_REF__/) {
1335: #key
1336: my $key='';
1337: if($string =~ /^__HASH_REF__/) {
1338: ($key, $string)=&str2hashref($string);
1339: if(defined($key->{'error'})) {
1340: $hash{'error'}='Bad data';
1341: return (\%hash, $string);
1342: }
1343: } elsif($string =~ /^__ARRAY_REF__/) {
1344: ($key, $string)=&str2arrayref($string);
1345: if($key->[0] eq 'Array reference error') {
1346: $hash{'error'}='Bad data';
1347: return (\%hash, $string);
1348: }
1349: } else {
1350: $string =~ s/^(.*?)=//;
1351: $key=&unescape($1);
1352: }
1353: $string =~ s/^=//;
1354:
1355: #value
1356: my $value='';
1357: if($string =~ /^__HASH_REF__/) {
1358: ($value, $string)=&str2hashref($string);
1359: if(defined($value->{'error'})) {
1360: $hash{'error'}='Bad data';
1361: return (\%hash, $string);
1362: }
1363: } elsif($string =~ /^__ARRAY_REF__/) {
1364: ($value, $string)=&str2arrayref($string);
1365: if($value->[0] eq 'Array reference error') {
1366: $hash{'error'}='Bad data';
1367: return (\%hash, $string);
1368: }
1369: } else {
1370: $value=&get_scalar(\$string,'__END_HASH_REF__');
1371: }
1372: $string =~ s/^&//;
1373:
1374: $hash{$key}=$value;
1375: }
1376:
1377: $string =~ s/^__END_HASH_REF__//;
1378:
1379: return (\%hash, $string);
1380: }
1381:
1382: sub str2array {
1383: my ($string)=@_;
1384: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1385: return @$array;
1386: }
1387:
1388: sub str2arrayref {
1389: my ($string) = @_;
1390: my @array;
1391:
1392: if($string !~ /^__ARRAY_REF__/) {
1393: if (! ($string eq '' || !defined($string))) {
1394: $array[0]='Array reference error';
1395: }
1396: return (\@array, $string);
1397: }
1398:
1399: $string =~ s/^__ARRAY_REF__//;
1400:
1401: while($string !~ /^__END_ARRAY_REF__/) {
1402: my $value='';
1403: if($string =~ /^__HASH_REF__/) {
1404: ($value, $string)=&str2hashref($string);
1405: if(defined($value->{'error'})) {
1406: $array[0] ='Array reference error';
1407: return (\@array, $string);
1408: }
1409: } elsif($string =~ /^__ARRAY_REF__/) {
1410: ($value, $string)=&str2arrayref($string);
1411: if($value->[0] eq 'Array reference error') {
1412: $array[0] ='Array reference error';
1413: return (\@array, $string);
1414: }
1415: } else {
1416: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1417: }
1418: $string =~ s/^&//;
1419:
1420: push(@array, $value);
1421: }
1422:
1423: $string =~ s/^__END_ARRAY_REF__//;
1424:
1425: return (\@array, $string);
1426: }
1427:
1428: # -------------------------------------------------------------------Temp Store
1429:
1430: sub tmpreset {
1431: my ($symb,$namespace,$domain,$stuname) = @_;
1432: if (!$symb) {
1433: $symb=&symbread();
1434: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1435: }
1436: $symb=escape($symb);
1437:
1438: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1439: $namespace=~s/\//\_/g;
1440: $namespace=~s/\W//g;
1441:
1442: #FIXME needs to do something for /pub resources
1443: if (!$domain) { $domain=$ENV{'user.domain'}; }
1444: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1445: my $path=$perlvar{'lonDaemons'}.'/tmp';
1446: my %hash;
1447: if (tie(%hash,'GDBM_File',
1448: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1449: &GDBM_WRCREAT(),0640)) {
1450: foreach my $key (keys %hash) {
1451: if ($key=~ /:$symb/) {
1452: delete($hash{$key});
1453: }
1454: }
1455: }
1456: }
1457:
1458: sub tmpstore {
1459: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1460:
1461: if (!$symb) {
1462: $symb=&symbread();
1463: if (!$symb) { $symb= $ENV{'request.url'}; }
1464: }
1465: $symb=escape($symb);
1466:
1467: if (!$namespace) {
1468: # I don't think we would ever want to store this for a course.
1469: # it seems this will only be used if we don't have a course.
1470: #$namespace=$ENV{'request.course.id'};
1471: #if (!$namespace) {
1472: $namespace=$ENV{'request.state'};
1473: #}
1474: }
1475: $namespace=~s/\//\_/g;
1476: $namespace=~s/\W//g;
1477: #FIXME needs to do something for /pub resources
1478: if (!$domain) { $domain=$ENV{'user.domain'}; }
1479: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1480: my $now=time;
1481: my %hash;
1482: my $path=$perlvar{'lonDaemons'}.'/tmp';
1483: if (tie(%hash,'GDBM_File',
1484: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1485: &GDBM_WRCREAT(),0640)) {
1486: $hash{"version:$symb"}++;
1487: my $version=$hash{"version:$symb"};
1488: my $allkeys='';
1489: foreach my $key (keys(%$storehash)) {
1490: $allkeys.=$key.':';
1491: $hash{"$version:$symb:$key"}=$$storehash{$key};
1492: }
1493: $hash{"$version:$symb:timestamp"}=$now;
1494: $allkeys.='timestamp';
1495: $hash{"$version:keys:$symb"}=$allkeys;
1496: if (untie(%hash)) {
1497: return 'ok';
1498: } else {
1499: return "error:$!";
1500: }
1501: } else {
1502: return "error:$!";
1503: }
1504: }
1505:
1506: # -----------------------------------------------------------------Temp Restore
1507:
1508: sub tmprestore {
1509: my ($symb,$namespace,$domain,$stuname) = @_;
1510:
1511: if (!$symb) {
1512: $symb=&symbread();
1513: if (!$symb) { $symb= $ENV{'request.url'}; }
1514: }
1515: $symb=escape($symb);
1516:
1517: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1518: #FIXME needs to do something for /pub resources
1519: if (!$domain) { $domain=$ENV{'user.domain'}; }
1520: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1521:
1522: my %returnhash;
1523: $namespace=~s/\//\_/g;
1524: $namespace=~s/\W//g;
1525: my %hash;
1526: my $path=$perlvar{'lonDaemons'}.'/tmp';
1527: if (tie(%hash,'GDBM_File',
1528: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1529: &GDBM_READER(),0640)) {
1530: my $version=$hash{"version:$symb"};
1531: $returnhash{'version'}=$version;
1532: my $scope;
1533: for ($scope=1;$scope<=$version;$scope++) {
1534: my $vkeys=$hash{"$scope:keys:$symb"};
1535: my @keys=split(/:/,$vkeys);
1536: my $key;
1537: $returnhash{"$scope:keys"}=$vkeys;
1538: foreach $key (@keys) {
1539: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1540: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1541: }
1542: }
1543: if (!(untie(%hash))) {
1544: return "error:$!";
1545: }
1546: } else {
1547: return "error:$!";
1548: }
1549: return %returnhash;
1550: }
1551:
1552: # ----------------------------------------------------------------------- Store
1553:
1554: sub store {
1555: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1556: my $home='';
1557:
1558: if ($stuname) { $home=&homeserver($stuname,$domain); }
1559:
1560: $symb=&symbclean($symb);
1561: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1562:
1563: if (!$domain) { $domain=$ENV{'user.domain'}; }
1564: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1565:
1566: &devalidate($symb,$stuname,$domain);
1567:
1568: $symb=escape($symb);
1569: if (!$namespace) {
1570: unless ($namespace=$ENV{'request.course.id'}) {
1571: return '';
1572: }
1573: }
1574: if (!$home) { $home=$ENV{'user.home'}; }
1575: my $namevalue='';
1576: foreach (keys %$storehash) {
1577: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1578: }
1579: $namevalue=~s/\&$//;
1580: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1581: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1582: }
1583:
1584: # -------------------------------------------------------------- Critical Store
1585:
1586: sub cstore {
1587: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1588: my $home='';
1589:
1590: if ($stuname) { $home=&homeserver($stuname,$domain); }
1591:
1592: $symb=&symbclean($symb);
1593: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1594:
1595: if (!$domain) { $domain=$ENV{'user.domain'}; }
1596: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1597:
1598: &devalidate($symb,$stuname,$domain);
1599:
1600: $symb=escape($symb);
1601: if (!$namespace) {
1602: unless ($namespace=$ENV{'request.course.id'}) {
1603: return '';
1604: }
1605: }
1606: if (!$home) { $home=$ENV{'user.home'}; }
1607:
1608: my $namevalue='';
1609: foreach (keys %$storehash) {
1610: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1611: }
1612: $namevalue=~s/\&$//;
1613: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1614: return critical
1615: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1616: }
1617:
1618: # --------------------------------------------------------------------- Restore
1619:
1620: sub restore {
1621: my ($symb,$namespace,$domain,$stuname) = @_;
1622: my $home='';
1623:
1624: if ($stuname) { $home=&homeserver($stuname,$domain); }
1625:
1626: if (!$symb) {
1627: unless ($symb=escape(&symbread())) { return ''; }
1628: } else {
1629: $symb=&escape(&symbclean($symb));
1630: }
1631: if (!$namespace) {
1632: unless ($namespace=$ENV{'request.course.id'}) {
1633: return '';
1634: }
1635: }
1636: if (!$domain) { $domain=$ENV{'user.domain'}; }
1637: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1638: if (!$home) { $home=$ENV{'user.home'}; }
1639: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1640:
1641: my %returnhash=();
1642: foreach (split(/\&/,$answer)) {
1643: my ($name,$value)=split(/\=/,$_);
1644: $returnhash{&unescape($name)}=&unescape($value);
1645: }
1646: my $version;
1647: for ($version=1;$version<=$returnhash{'version'};$version++) {
1648: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1649: $returnhash{$_}=$returnhash{$version.':'.$_};
1650: }
1651: }
1652: return %returnhash;
1653: }
1654:
1655: # ---------------------------------------------------------- Course Description
1656:
1657: sub coursedescription {
1658: my $courseid=shift;
1659: $courseid=~s/^\///;
1660: $courseid=~s/\_/\//g;
1661: my ($cdomain,$cnum)=split(/\//,$courseid);
1662: my $chome=&homeserver($cnum,$cdomain);
1663: my $normalid=$cdomain.'_'.$cnum;
1664: # need to always cache even if we get errors otherwise we keep
1665: # trying and trying and trying to get the course description.
1666: my %envhash=();
1667: my %returnhash=();
1668: $envhash{'course.'.$normalid.'.last_cache'}=time;
1669: if ($chome ne 'no_host') {
1670: %returnhash=&dump('environment',$cdomain,$cnum);
1671: if (!exists($returnhash{'con_lost'})) {
1672: $returnhash{'home'}= $chome;
1673: $returnhash{'domain'} = $cdomain;
1674: $returnhash{'num'} = $cnum;
1675: while (my ($name,$value) = each %returnhash) {
1676: $envhash{'course.'.$normalid.'.'.$name}=$value;
1677: }
1678: $returnhash{'url'}=&clutter($returnhash{'url'});
1679: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1680: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1681: $envhash{'course.'.$normalid.'.home'}=$chome;
1682: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1683: $envhash{'course.'.$normalid.'.num'}=$cnum;
1684: }
1685: }
1686: &appenv(%envhash);
1687: return %returnhash;
1688: }
1689:
1690: # -------------------------------------------------------- Get user privileges
1691:
1692: sub rolesinit {
1693: my ($domain,$username,$authhost)=@_;
1694: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1695: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1696: my %allroles=();
1697: my %thesepriv=();
1698: my $now=time;
1699: my $userroles="user.login.time=$now\n";
1700: my $thesestr;
1701:
1702: if ($rolesdump ne '') {
1703: foreach (split(/&/,$rolesdump)) {
1704: if ($_!~/^rolesdef\&/) {
1705: my ($area,$role)=split(/=/,$_);
1706: $area=~s/\_\w\w$//;
1707: my ($trole,$tend,$tstart)=split(/_/,$role);
1708: $userroles.='user.role.'.$trole.'.'.$area.'='.
1709: $tstart.'.'.$tend."\n";
1710: if ($tend!=0) {
1711: if ($tend<$now) {
1712: $trole='';
1713: }
1714: }
1715: if ($tstart!=0) {
1716: if ($tstart>$now) {
1717: $trole='';
1718: }
1719: }
1720: if (($area ne '') && ($trole ne '')) {
1721: my $spec=$trole.'.'.$area;
1722: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1723: if ($trole =~ /^cr\//) {
1724: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1725: my $homsvr=homeserver($rauthor,$rdomain);
1726: if ($hostname{$homsvr} ne '') {
1727: my $roledef=
1728: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1729: $homsvr);
1730: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1731: my ($syspriv,$dompriv,$coursepriv)=
1732: split(/\_/,unescape($roledef));
1733: if (defined($syspriv)) {
1734: $allroles{'cm./'}.=':'.$syspriv;
1735: $allroles{$spec.'./'}.=':'.$syspriv;
1736: }
1737: if ($tdomain ne '') {
1738: if (defined($dompriv)) {
1739: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1740: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1741: }
1742: if ($trest ne '') {
1743: if (defined($coursepriv)) {
1744: $allroles{'cm.'.$area}.=':'.$coursepriv;
1745: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1746: }
1747: }
1748: }
1749: }
1750: }
1751: } else {
1752: if (defined($pr{$trole.':s'})) {
1753: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1754: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1755: }
1756: if ($tdomain ne '') {
1757: if (defined($pr{$trole.':d'})) {
1758: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1759: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1760: }
1761: if ($trest ne '') {
1762: if (defined($pr{$trole.':c'})) {
1763: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1764: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1765: }
1766: }
1767: }
1768: }
1769: }
1770: }
1771: }
1772: my $adv=0;
1773: my $author=0;
1774: foreach (keys %allroles) {
1775: %thesepriv=();
1776: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1777: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1778: foreach (split(/:/,$allroles{$_})) {
1779: if ($_ ne '') {
1780: my ($privilege,$restrictions)=split(/&/,$_);
1781: if ($restrictions eq '') {
1782: $thesepriv{$privilege}='F';
1783: } else {
1784: if ($thesepriv{$privilege} ne 'F') {
1785: $thesepriv{$privilege}.=$restrictions;
1786: }
1787: }
1788: }
1789: }
1790: $thesestr='';
1791: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1792: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1793: }
1794: $userroles.='user.adv='.$adv."\n".
1795: 'user.author='.$author."\n";
1796: $ENV{'user.adv'}=$adv;
1797: }
1798: return $userroles;
1799: }
1800:
1801: # --------------------------------------------------------------- get interface
1802:
1803: sub get {
1804: my ($namespace,$storearr,$udomain,$uname)=@_;
1805: my $items='';
1806: foreach (@$storearr) {
1807: $items.=escape($_).'&';
1808: }
1809: $items=~s/\&$//;
1810: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1811: if (!$uname) { $uname=$ENV{'user.name'}; }
1812: my $uhome=&homeserver($uname,$udomain);
1813:
1814: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1815: my @pairs=split(/\&/,$rep);
1816: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1817: return @pairs;
1818: }
1819: my %returnhash=();
1820: my $i=0;
1821: foreach (@$storearr) {
1822: $returnhash{$_}=unescape($pairs[$i]);
1823: $i++;
1824: }
1825: return %returnhash;
1826: }
1827:
1828: # --------------------------------------------------------------- del interface
1829:
1830: sub del {
1831: my ($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,$udomain);
1840:
1841: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1842: }
1843:
1844: # -------------------------------------------------------------- dump interface
1845:
1846: sub dump {
1847: my ($namespace,$udomain,$uname,$regexp)=@_;
1848: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1849: if (!$uname) { $uname=$ENV{'user.name'}; }
1850: my $uhome=&homeserver($uname,$udomain);
1851: if ($regexp) {
1852: $regexp=&escape($regexp);
1853: } else {
1854: $regexp='.';
1855: }
1856: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1857: my @pairs=split(/\&/,$rep);
1858: my %returnhash=();
1859: foreach (@pairs) {
1860: my ($key,$value)=split(/=/,$_);
1861: $returnhash{unescape($key)}=unescape($value);
1862: }
1863: return %returnhash;
1864: }
1865:
1866: # --------------------------------------------------------------- currentdump
1867: sub currentdump {
1868: my ($courseid,$sdom,$sname)=@_;
1869: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1870: $sdom = $ENV{'user.domain'} if (! defined($sdom));
1871: $sname = $ENV{'user.name'} if (! defined($sname));
1872: my $uhome = &homeserver($sname,$sdom);
1873: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
1874: return if ($rep =~ /^(error:|no_such_host)/);
1875: #
1876: my %returnhash=();
1877: #
1878: if ($rep eq "unknown_cmd") {
1879: # an old lond will not know currentdump
1880: # Do a dump and make it look like a currentdump
1881: my @tmp = &dump($courseid,$sdom,$sname,'.');
1882: return if ($tmp[0] =~ /^(error:|no_such_host)/);
1883: my %hash = @tmp;
1884: @tmp=();
1885: # Code ripped from lond, essentially. The only difference
1886: # here is the unescaping done by lonnet::dump(). Conceivably
1887: # we might run in to problems with parameter names =~ /^v\./
1888: while (my ($key,$value) = each(%hash)) {
1889: my ($v,$symb,$param) = split(/:/,$key);
1890: next if ($v eq 'version' || $symb eq 'keys');
1891: next if (exists($returnhash{$symb}) &&
1892: exists($returnhash{$symb}->{$param}) &&
1893: $returnhash{$symb}->{'v.'.$param} > $v);
1894: $returnhash{$symb}->{$param}=$value;
1895: $returnhash{$symb}->{'v.'.$param}=$v;
1896: }
1897: #
1898: # Remove all of the keys in the hashes which keep track of
1899: # the version of the parameter.
1900: while (my ($symb,$param_hash) = each(%returnhash)) {
1901: # use a foreach because we are going to delete from the hash.
1902: foreach my $key (keys(%$param_hash)) {
1903: delete($param_hash->{$key}) if ($key =~ /^v\./);
1904: }
1905: }
1906: } else {
1907: my @pairs=split(/\&/,$rep);
1908: foreach (@pairs) {
1909: my ($key,$value)=split(/=/,$_);
1910: my ($symb,$param) = split(/:/,$key);
1911: $returnhash{&unescape($symb)}->{&unescape($param)} =
1912: &unescape($value);
1913: }
1914: }
1915: return %returnhash;
1916: }
1917:
1918: # --------------------------------------------------------------- put interface
1919:
1920: sub put {
1921: my ($namespace,$storehash,$udomain,$uname)=@_;
1922: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1923: if (!$uname) { $uname=$ENV{'user.name'}; }
1924: my $uhome=&homeserver($uname,$udomain);
1925: my $items='';
1926: foreach (keys %$storehash) {
1927: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1928: }
1929: $items=~s/\&$//;
1930: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1931: }
1932:
1933: # ------------------------------------------------------ critical put interface
1934:
1935: sub cput {
1936: my ($namespace,$storehash,$udomain,$uname)=@_;
1937: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1938: if (!$uname) { $uname=$ENV{'user.name'}; }
1939: my $uhome=&homeserver($uname,$udomain);
1940: my $items='';
1941: foreach (keys %$storehash) {
1942: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1943: }
1944: $items=~s/\&$//;
1945: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1946: }
1947:
1948: # -------------------------------------------------------------- eget interface
1949:
1950: sub eget {
1951: my ($namespace,$storearr,$udomain,$uname)=@_;
1952: my $items='';
1953: foreach (@$storearr) {
1954: $items.=escape($_).'&';
1955: }
1956: $items=~s/\&$//;
1957: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1958: if (!$uname) { $uname=$ENV{'user.name'}; }
1959: my $uhome=&homeserver($uname,$udomain);
1960: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1961: my @pairs=split(/\&/,$rep);
1962: my %returnhash=();
1963: my $i=0;
1964: foreach (@$storearr) {
1965: $returnhash{$_}=unescape($pairs[$i]);
1966: $i++;
1967: }
1968: return %returnhash;
1969: }
1970:
1971: # ---------------------------------------------- Custom access rule evaluation
1972:
1973: sub customaccess {
1974: my ($priv,$uri)=@_;
1975: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
1976: $urealm=~s/^\W//;
1977: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
1978: my $access=0;
1979: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
1980: my ($effect,$realm,$role)=split(/\:/,$_);
1981: if ($role) {
1982: if ($role ne $urole) { next; }
1983: }
1984: foreach (split(/\s*\,\s*/,$realm)) {
1985: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
1986: if ($tdom) {
1987: if ($tdom ne $udom) { next; }
1988: }
1989: if ($tcrs) {
1990: if ($tcrs ne $ucrs) { next; }
1991: }
1992: if ($tsec) {
1993: if ($tsec ne $usec) { next; }
1994: }
1995: $access=($effect eq 'allow');
1996: last;
1997: }
1998: }
1999: return $access;
2000: }
2001:
2002: # ------------------------------------------------- Check for a user privilege
2003:
2004: sub allowed {
2005: my ($priv,$uri)=@_;
2006:
2007: my $orguri=$uri;
2008: $uri=&declutter($uri);
2009:
2010: # Free bre access to adm and meta resources
2011:
2012: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2013: return 'F';
2014: }
2015:
2016: # Free bre to public access
2017:
2018: if ($priv eq 'bre') {
2019: my $copyright=&metadata($uri,'copyright');
2020: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2021: return 'F';
2022: }
2023: if ($copyright eq 'priv') {
2024: $uri=~/([^\/]+)\/([^\/]+)\//;
2025: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2026: return '';
2027: }
2028: }
2029: if ($copyright eq 'domain') {
2030: $uri=~/([^\/]+)\/([^\/]+)\//;
2031: unless (($ENV{'user.domain'} eq $1) ||
2032: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2033: return '';
2034: }
2035: }
2036: if ($ENV{'request.role'}=~ /li\.\//) {
2037: # Library role, so allow browsing of resources in this domain.
2038: return 'F';
2039: }
2040: if ($copyright eq 'custom') {
2041: unless (&customaccess($priv,$uri)) { return ''; }
2042: }
2043: }
2044: # Domain coordinator is trying to create a course
2045: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2046: # uri is the requested domain in this case.
2047: # comparison to 'request.role.domain' shows if the user has selected
2048: # a role of dc for the domain in question.
2049: return 'F' if ($uri eq $ENV{'request.role.domain'});
2050: }
2051:
2052: my $thisallowed='';
2053: my $statecond=0;
2054: my $courseprivid='';
2055:
2056: # Course
2057:
2058: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2059: $thisallowed.=$1;
2060: }
2061:
2062: # Domain
2063:
2064: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2065: =~/$priv\&([^\:]*)/) {
2066: $thisallowed.=$1;
2067: }
2068:
2069: # Course: uri itself is a course
2070: my $courseuri=$uri;
2071: $courseuri=~s/\_(\d)/\/$1/;
2072: $courseuri=~s/^([^\/])/\/$1/;
2073:
2074: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2075: =~/$priv\&([^\:]*)/) {
2076: $thisallowed.=$1;
2077: }
2078:
2079: # URI is an uploaded document for this course
2080:
2081: if (($priv eq 'bre') &&
2082: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2083: return 'F';
2084: }
2085: # Full access at system, domain or course-wide level? Exit.
2086:
2087: if ($thisallowed=~/F/) {
2088: return 'F';
2089: }
2090:
2091: # If this is generating or modifying users, exit with special codes
2092:
2093: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
2094: return $thisallowed;
2095: }
2096: #
2097: # Gathered so far: system, domain and course wide privileges
2098: #
2099: # Course: See if uri or referer is an individual resource that is part of
2100: # the course
2101:
2102: if ($ENV{'request.course.id'}) {
2103:
2104: $courseprivid=$ENV{'request.course.id'};
2105: if ($ENV{'request.course.sec'}) {
2106: $courseprivid.='/'.$ENV{'request.course.sec'};
2107: }
2108: $courseprivid=~s/\_/\//;
2109: my $checkreferer=1;
2110: my ($match,$cond)=&is_on_map($uri);
2111: if ($match) {
2112: $statecond=$cond;
2113: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2114: =~/$priv\&([^\:]*)/) {
2115: $thisallowed.=$1;
2116: $checkreferer=0;
2117: }
2118: }
2119:
2120: if ($checkreferer) {
2121: my $refuri=$ENV{'httpref.'.$orguri};
2122: unless ($refuri) {
2123: foreach (keys %ENV) {
2124: if ($_=~/^httpref\..*\*/) {
2125: my $pattern=$_;
2126: $pattern=~s/^httpref\.\/res\///;
2127: $pattern=~s/\*/\[\^\/\]\+/g;
2128: $pattern=~s/\//\\\//g;
2129: if ($orguri=~/$pattern/) {
2130: $refuri=$ENV{$_};
2131: }
2132: }
2133: }
2134: }
2135:
2136: if ($refuri) {
2137: $refuri=&declutter($refuri);
2138: my ($match,$cond)=&is_on_map($refuri);
2139: if ($match) {
2140: my $refstatecond=$cond;
2141: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2142: =~/$priv\&([^\:]*)/) {
2143: $thisallowed.=$1;
2144: $uri=$refuri;
2145: $statecond=$refstatecond;
2146: }
2147: }
2148: }
2149: }
2150: }
2151:
2152: #
2153: # Gathered now: all privileges that could apply, and condition number
2154: #
2155: #
2156: # Full or no access?
2157: #
2158:
2159: if ($thisallowed=~/F/) {
2160: return 'F';
2161: }
2162:
2163: unless ($thisallowed) {
2164: return '';
2165: }
2166:
2167: # Restrictions exist, deal with them
2168: #
2169: # C:according to course preferences
2170: # R:according to resource settings
2171: # L:unless locked
2172: # X:according to user session state
2173: #
2174:
2175: # Possibly locked functionality, check all courses
2176: # Locks might take effect only after 10 minutes cache expiration for other
2177: # courses, and 2 minutes for current course
2178:
2179: my $envkey;
2180: if ($thisallowed=~/L/) {
2181: foreach $envkey (keys %ENV) {
2182: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2183: my $courseid=$2;
2184: my $roleid=$1.'.'.$2;
2185: $courseid=~s/^\///;
2186: my $expiretime=600;
2187: if ($ENV{'request.role'} eq $roleid) {
2188: $expiretime=120;
2189: }
2190: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2191: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2192: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2193: &coursedescription($courseid);
2194: }
2195: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2196: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2197: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2198: &log($ENV{'user.domain'},$ENV{'user.name'},
2199: $ENV{'user.home'},
2200: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2201: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2202: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2203: return '';
2204: }
2205: }
2206: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2207: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2208: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2209: &log($ENV{'user.domain'},$ENV{'user.name'},
2210: $ENV{'user.home'},
2211: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2212: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2213: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2214: return '';
2215: }
2216: }
2217: }
2218: }
2219: }
2220:
2221: #
2222: # Rest of the restrictions depend on selected course
2223: #
2224:
2225: unless ($ENV{'request.course.id'}) {
2226: return '1';
2227: }
2228:
2229: #
2230: # Now user is definitely in a course
2231: #
2232:
2233:
2234: # Course preferences
2235:
2236: if ($thisallowed=~/C/) {
2237: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2238: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2239: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2240: =~/$rolecode/) {
2241: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2242: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2243: $ENV{'request.course.id'});
2244: return '';
2245: }
2246:
2247: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2248: =~/$unamedom/) {
2249: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2250: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2251: $ENV{'request.course.id'});
2252: return '';
2253: }
2254: }
2255:
2256: # Resource preferences
2257:
2258: if ($thisallowed=~/R/) {
2259: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2260: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2261: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2262: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2263: return '';
2264: }
2265: }
2266:
2267: # Restricted by state or randomout?
2268:
2269: if ($thisallowed=~/X/) {
2270: if ($ENV{'acc.randomout'}) {
2271: my $symb=&symbread($uri,1);
2272: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2273: return '';
2274: }
2275: }
2276: if (&condval($statecond)) {
2277: return '2';
2278: } else {
2279: return '';
2280: }
2281: }
2282:
2283: return 'F';
2284: }
2285:
2286: # --------------------------------------------------- Is a resource on the map?
2287:
2288: sub is_on_map {
2289: my $uri=&declutter(shift);
2290: my @uriparts=split(/\//,$uri);
2291: my $filename=$uriparts[$#uriparts];
2292: my $pathname=$uri;
2293: $pathname=~s|/\Q$filename\E$||;
2294: $pathname=~s/^adm\/wrapper\///;
2295: #Trying to find the conditional for the file
2296: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2297: /\&\Q$filename\E\:([\d\|]+)\&/);
2298: if ($match) {
2299: return (1,$1);
2300: } else {
2301: return (0,0);
2302: }
2303: }
2304:
2305: # ----------------------------------------------------------------- Define Role
2306:
2307: sub definerole {
2308: if (allowed('mcr','/')) {
2309: my ($rolename,$sysrole,$domrole,$courole)=@_;
2310: foreach (split('/',$sysrole)) {
2311: my ($crole,$cqual)=split(/\&/,$_);
2312: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2313: if ($pr{'cr:s'}=~/$crole\&/) {
2314: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2315: return "refused:s:$crole&$cqual";
2316: }
2317: }
2318: }
2319: foreach (split('/',$domrole)) {
2320: my ($crole,$cqual)=split(/\&/,$_);
2321: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2322: if ($pr{'cr:d'}=~/$crole\&/) {
2323: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2324: return "refused:d:$crole&$cqual";
2325: }
2326: }
2327: }
2328: foreach (split('/',$courole)) {
2329: my ($crole,$cqual)=split(/\&/,$_);
2330: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2331: if ($pr{'cr:c'}=~/$crole\&/) {
2332: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2333: return "refused:c:$crole&$cqual";
2334: }
2335: }
2336: }
2337: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2338: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2339: "rolesdef_$rolename=".
2340: escape($sysrole.'_'.$domrole.'_'.$courole);
2341: return reply($command,$ENV{'user.home'});
2342: } else {
2343: return 'refused';
2344: }
2345: }
2346:
2347: # ---------------- Make a metadata query against the network of library servers
2348:
2349: sub metadata_query {
2350: my ($query,$custom,$customshow,$server_array)=@_;
2351: my %rhash;
2352: my @server_list = (defined($server_array) ? @$server_array
2353: : keys(%libserv) );
2354: for my $server (@server_list) {
2355: unless ($custom or $customshow) {
2356: my $reply=&reply("querysend:".&escape($query),$server);
2357: $rhash{$server}=$reply;
2358: }
2359: else {
2360: my $reply=&reply("querysend:".&escape($query).':'.
2361: &escape($custom).':'.&escape($customshow),
2362: $server);
2363: $rhash{$server}=$reply;
2364: }
2365: }
2366: return \%rhash;
2367: }
2368:
2369: # ----------------------------------------- Send log queries and wait for reply
2370:
2371: sub log_query {
2372: my ($uname,$udom,$query,%filters)=@_;
2373: my $uhome=&homeserver($uname,$udom);
2374: if ($uhome eq 'no_host') { return 'error: no_host'; }
2375: my $uhost=$hostname{$uhome};
2376: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2377: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2378: $uhome);
2379: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2380: return get_query_reply($queryid);
2381: }
2382:
2383: sub get_query_reply {
2384: my $queryid=shift;
2385: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2386: my $reply='';
2387: for (1..100) {
2388: sleep 2;
2389: if (-e $replyfile.'.end') {
2390: if (my $fh=Apache::File->new($replyfile)) {
2391: $reply.=<$fh>;
2392: $fh->close;
2393: } else { return 'error: reply_file_error'; }
2394: return &unescape($reply);
2395: }
2396: }
2397: return 'timeout:'.$queryid;
2398: }
2399:
2400: sub courselog_query {
2401: #
2402: # possible filters:
2403: # url: url or symb
2404: # username
2405: # domain
2406: # action: view, submit, grade
2407: # start: timestamp
2408: # end: timestamp
2409: #
2410: my (%filters)=@_;
2411: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2412: if ($filters{'url'}) {
2413: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2414: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2415: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2416: }
2417: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2418: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2419: return &log_query($cname,$cdom,'courselog',%filters);
2420: }
2421:
2422: sub userlog_query {
2423: my ($uname,$udom,%filters)=@_;
2424: return &log_query($uname,$udom,'userlog',%filters);
2425: }
2426:
2427: # ------------------------------------------------------------------ Plain Text
2428:
2429: sub plaintext {
2430: my $short=shift;
2431: return $prp{$short};
2432: }
2433:
2434: # ----------------------------------------------------------------- Assign Role
2435:
2436: sub assignrole {
2437: my ($udom,$uname,$url,$role,$end,$start)=@_;
2438: my $mrole;
2439: if ($role =~ /^cr\//) {
2440: unless (&allowed('ccr',$url)) {
2441: &logthis('Refused custom assignrole: '.
2442: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2443: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2444: return 'refused';
2445: }
2446: $mrole='cr';
2447: } else {
2448: my $cwosec=$url;
2449: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2450: unless (&allowed('c'.$role,$cwosec)) {
2451: &logthis('Refused assignrole: '.
2452: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2453: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2454: return 'refused';
2455: }
2456: $mrole=$role;
2457: }
2458: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2459: "$udom:$uname:$url".'_'."$mrole=$role";
2460: if ($end) { $command.='_'.$end; }
2461: if ($start) {
2462: if ($end) {
2463: $command.='_'.$start;
2464: } else {
2465: $command.='_0_'.$start;
2466: }
2467: }
2468: return &reply($command,&homeserver($uname,$udom));
2469: }
2470:
2471: # -------------------------------------------------- Modify user authentication
2472: # Overrides without validation
2473:
2474: sub modifyuserauth {
2475: my ($udom,$uname,$umode,$upass)=@_;
2476: my $uhome=&homeserver($uname,$udom);
2477: unless (&allowed('mau',$udom)) { return 'refused'; }
2478: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2479: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2480: ' in domain '.$ENV{'request.role.domain'});
2481: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2482: &escape($upass),$uhome);
2483: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2484: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2485: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2486: &log($udom,,$uname,$uhome,
2487: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2488: $ENV{'user.name'}.', '.$umode.
2489: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2490: unless ($reply eq 'ok') {
2491: &logthis('Authentication mode error: '.$reply);
2492: return 'error: '.$reply;
2493: }
2494: return 'ok';
2495: }
2496:
2497: # --------------------------------------------------------------- Modify a user
2498:
2499: sub modifyuser {
2500: my ($udom, $uname, $uid,
2501: $umode, $upass, $first,
2502: $middle, $last, $gene,
2503: $forceid, $desiredhome)=@_;
2504: $udom=~s/\W//g;
2505: $uname=~s/\W//g;
2506: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2507: $umode.', '.$first.', '.$middle.', '.
2508: $last.', '.$gene.'(forceid: '.$forceid.')'.
2509: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2510: ' desiredhome not specified').
2511: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2512: ' in domain '.$ENV{'request.role.domain'});
2513: my $uhome=&homeserver($uname,$udom,'true');
2514: # ----------------------------------------------------------------- Create User
2515: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2516: my $unhome='';
2517: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2518: $unhome = $desiredhome;
2519: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2520: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2521: } else { # load balancing routine for determining $unhome
2522: my $tryserver;
2523: my $loadm=10000000;
2524: foreach $tryserver (keys %libserv) {
2525: if ($hostdom{$tryserver} eq $udom) {
2526: my $answer=reply('load',$tryserver);
2527: if (($answer=~/\d+/) && ($answer<$loadm)) {
2528: $loadm=$answer;
2529: $unhome=$tryserver;
2530: }
2531: }
2532: }
2533: }
2534: if (($unhome eq '') || ($unhome eq 'no_host')) {
2535: return 'error: unable to find a home server for '.$uname.
2536: ' in domain '.$udom;
2537: }
2538: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2539: &escape($upass),$unhome);
2540: unless ($reply eq 'ok') {
2541: return 'error: '.$reply;
2542: }
2543: $uhome=&homeserver($uname,$udom,'true');
2544: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2545: return 'error: verify home';
2546: }
2547: } # End of creation of new user
2548: # ---------------------------------------------------------------------- Add ID
2549: if ($uid) {
2550: $uid=~tr/A-Z/a-z/;
2551: my %uidhash=&idrget($udom,$uname);
2552: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2553: && (!$forceid)) {
2554: unless ($uid eq $uidhash{$uname}) {
2555: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2556: }
2557: } else {
2558: &idput($udom,($uname => $uid));
2559: }
2560: }
2561: # -------------------------------------------------------------- Add names, etc
2562: my @tmp=&get('environment',
2563: ['firstname','middlename','lastname','generation'],
2564: $udom,$uname);
2565: my %names;
2566: if ($tmp[0] =~ m/^error:.*/) {
2567: %names=();
2568: } else {
2569: %names = @tmp;
2570: }
2571: if ($first) { $names{'firstname'} = $first; }
2572: if ($middle) { $names{'middlename'} = $middle; }
2573: if ($last) { $names{'lastname'} = $last; }
2574: if ($gene) { $names{'generation'} = $gene; }
2575: my $reply = &put('environment', \%names, $udom,$uname);
2576: if ($reply ne 'ok') { return 'error: '.$reply; }
2577: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2578: $umode.', '.$first.', '.$middle.', '.
2579: $last.', '.$gene.' by '.
2580: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2581: return 'ok';
2582: }
2583:
2584: # -------------------------------------------------------------- Modify student
2585:
2586: sub modifystudent {
2587: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2588: $end,$start,$forceid,$desiredhome)=@_;
2589: my $cid='';
2590: unless ($cid=$ENV{'request.course.id'}) {
2591: return 'not_in_class';
2592: }
2593: # --------------------------------------------------------------- Make the user
2594: my $reply=&modifyuser
2595: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2596: $desiredhome);
2597: unless ($reply eq 'ok') { return $reply; }
2598: # This will cause &modify_student_enrollment to get the uid from the
2599: # students environment
2600: $uid = undef if (!$forceid);
2601: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2602: $last,$gene,$usec,$end,$start);
2603: return $reply;
2604: }
2605:
2606: sub modify_student_enrollment {
2607: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2608: # Get the course id from the environment
2609: my $cid='';
2610: unless ($cid=$ENV{'request.course.id'}) {
2611: return 'not_in_class';
2612: }
2613: # Make sure the user exists
2614: my $uhome=&homeserver($uname,$udom);
2615: if (($uhome eq '') || ($uhome eq 'no_host')) {
2616: return 'error: no such user';
2617: }
2618: #
2619: # Get student data if we were not given enough information
2620: if (!defined($first) || $first eq '' ||
2621: !defined($last) || $last eq '' ||
2622: !defined($uid) || $uid eq '' ||
2623: !defined($middle) || $middle eq '' ||
2624: !defined($gene) || $gene eq '') {
2625: # They did not supply us with enough data to enroll the student, so
2626: # we need to pick up more information.
2627: my %tmp = &get('environment',
2628: ['firstname','middlename','lastname', 'generation','id']
2629: ,$udom,$uname);
2630:
2631: foreach (keys(%tmp)) {
2632: &logthis("key $_ = ".$tmp{$_});
2633: }
2634: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2635: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2636: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
2637: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
2638: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2639: }
2640: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2641: $first,$middle);
2642: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2643: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2644: &escape($uname.':'.$udom).'='.
2645: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
2646: $ENV{'course.'.$cid.'.home'});
2647: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2648: return 'error: '.$reply;
2649: }
2650: # Add student role to user
2651: my $uurl='/'.$cid;
2652: $uurl=~s/\_/\//g;
2653: if ($usec) {
2654: $uurl.='/'.$usec;
2655: }
2656: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2657: }
2658:
2659: # ------------------------------------------------- Write to course preferences
2660:
2661: sub writecoursepref {
2662: my ($courseid,%prefs)=@_;
2663: $courseid=~s/^\///;
2664: $courseid=~s/\_/\//g;
2665: my ($cdomain,$cnum)=split(/\//,$courseid);
2666: my $chome=homeserver($cnum,$cdomain);
2667: if (($chome eq '') || ($chome eq 'no_host')) {
2668: return 'error: no such course';
2669: }
2670: my $cstring='';
2671: foreach (keys %prefs) {
2672: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2673: }
2674: $cstring=~s/\&$//;
2675: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2676: }
2677:
2678: # ---------------------------------------------------------- Make/modify course
2679:
2680: sub createcourse {
2681: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2682: $url=&declutter($url);
2683: my $cid='';
2684: unless (&allowed('ccc',$udom)) {
2685: return 'refused';
2686: }
2687: # ------------------------------------------------------------------- Create ID
2688: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2689: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2690: # ----------------------------------------------- Make sure that does not exist
2691: my $uhome=&homeserver($uname,$udom,'true');
2692: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2693: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2694: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2695: $uhome=&homeserver($uname,$udom,'true');
2696: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2697: return 'error: unable to generate unique course-ID';
2698: }
2699: }
2700: # ------------------------------------------------ Check supplied server name
2701: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2702: if (! exists($libserv{$course_server})) {
2703: return 'error:bad server name '.$course_server;
2704: }
2705: # ------------------------------------------------------------- Make the course
2706: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2707: $course_server);
2708: unless ($reply eq 'ok') { return 'error: '.$reply; }
2709: $uhome=&homeserver($uname,$udom,'true');
2710: if (($uhome eq '') || ($uhome eq 'no_host')) {
2711: return 'error: no such course';
2712: }
2713: # ----------------------------------------------------------------- Course made
2714: my $topurl=$url;
2715: unless ($nonstandard) {
2716: # ------------------------------------------ For standard courses, make top url
2717: my $mapurl=&clutter($url);
2718: if ($mapurl eq '/res/') { $mapurl=''; }
2719: $ENV{'form.initmap'}=(<<ENDINITMAP);
2720: <map>
2721: <resource id="1" type="start"></resource>
2722: <resource id="2" src="$mapurl"></resource>
2723: <resource id="3" type="finish"></resource>
2724: <link index="1" from="1" to="2"></link>
2725: <link index="2" from="2" to="3"></link>
2726: </map>
2727: ENDINITMAP
2728: $topurl=&declutter(
2729: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2730: );
2731: }
2732: # ----------------------------------------------------------- Write preferences
2733: &writecoursepref($udom.'_'.$uname,
2734: ('description' => $description,
2735: 'url' => $topurl));
2736: return '/'.$udom.'/'.$uname;
2737: }
2738:
2739: # ---------------------------------------------------------- Assign Custom Role
2740:
2741: sub assigncustomrole {
2742: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2743: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2744: $end,$start);
2745: }
2746:
2747: # ----------------------------------------------------------------- Revoke Role
2748:
2749: sub revokerole {
2750: my ($udom,$uname,$url,$role)=@_;
2751: my $now=time;
2752: return &assignrole($udom,$uname,$url,$role,$now);
2753: }
2754:
2755: # ---------------------------------------------------------- Revoke Custom Role
2756:
2757: sub revokecustomrole {
2758: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2759: my $now=time;
2760: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2761: }
2762:
2763: # ------------------------------------------------------------ Directory lister
2764:
2765: sub dirlist {
2766: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2767:
2768: $uri=~s/^\///;
2769: $uri=~s/\/$//;
2770: my ($udom, $uname);
2771: (undef,$udom,$uname)=split(/\//,$uri);
2772: if(defined($userdomain)) {
2773: $udom = $userdomain;
2774: }
2775: if(defined($username)) {
2776: $uname = $username;
2777: }
2778:
2779: my $dirRoot = $perlvar{'lonDocRoot'};
2780: if(defined($alternateDirectoryRoot)) {
2781: $dirRoot = $alternateDirectoryRoot;
2782: $dirRoot =~ s/\/$//;
2783: }
2784:
2785: if($udom) {
2786: if($uname) {
2787: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2788: homeserver($uname,$udom));
2789: return split(/:/,$listing);
2790: } elsif(!defined($alternateDirectoryRoot)) {
2791: my $tryserver;
2792: my %allusers=();
2793: foreach $tryserver (keys %libserv) {
2794: if($hostdom{$tryserver} eq $udom) {
2795: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2796: $udom, $tryserver);
2797: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2798: && ($listing ne 'con_lost')) {
2799: foreach (split(/:/,$listing)) {
2800: my ($entry,@stat)=split(/&/,$_);
2801: $allusers{$entry}=1;
2802: }
2803: }
2804: }
2805: }
2806: my $alluserstr='';
2807: foreach (sort keys %allusers) {
2808: $alluserstr.=$_.'&user:';
2809: }
2810: $alluserstr=~s/:$//;
2811: return split(/:/,$alluserstr);
2812: } else {
2813: my @emptyResults = ();
2814: push(@emptyResults, 'missing user name');
2815: return split(':',@emptyResults);
2816: }
2817: } elsif(!defined($alternateDirectoryRoot)) {
2818: my $tryserver;
2819: my %alldom=();
2820: foreach $tryserver (keys %libserv) {
2821: $alldom{$hostdom{$tryserver}}=1;
2822: }
2823: my $alldomstr='';
2824: foreach (sort keys %alldom) {
2825: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2826: }
2827: $alldomstr=~s/:$//;
2828: return split(/:/,$alldomstr);
2829: } else {
2830: my @emptyResults = ();
2831: push(@emptyResults, 'missing domain');
2832: return split(':',@emptyResults);
2833: }
2834: }
2835:
2836: # --------------------------------------------- GetFileTimestamp
2837: # This function utilizes dirlist and returns the date stamp for
2838: # when it was last modified. It will also return an error of -1
2839: # if an error occurs
2840:
2841: sub GetFileTimestamp {
2842: my ($studentDomain,$studentName,$filename,$root)=@_;
2843: $studentDomain=~s/\W//g;
2844: $studentName=~s/\W//g;
2845: my $subdir=$studentName.'__';
2846: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
2847: my $proname="$studentDomain/$subdir/$studentName";
2848: $proname .= '/'.$filename;
2849: my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
2850: $root);
2851: my $fileStat = $dir[0];
2852: my @stats = split('&', $fileStat);
2853: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
2854: return $stats[9];
2855: } else {
2856: return -1;
2857: }
2858: }
2859:
2860: # -------------------------------------------------------- Value of a Condition
2861:
2862: sub directcondval {
2863: my $number=shift;
2864: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2865: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2866: } else {
2867: return 2;
2868: }
2869: }
2870:
2871: sub condval {
2872: my $condidx=shift;
2873: my $result=0;
2874: my $allpathcond='';
2875: foreach (split(/\|/,$condidx)) {
2876: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2877: $allpathcond.=
2878: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2879: }
2880: }
2881: $allpathcond=~s/\|$//;
2882: if ($ENV{'request.course.id'}) {
2883: if ($allpathcond) {
2884: my $operand='|';
2885: my @stack;
2886: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2887: if ($_ eq '(') {
2888: push @stack,($operand,$result)
2889: } elsif ($_ eq ')') {
2890: my $before=pop @stack;
2891: if (pop @stack eq '&') {
2892: $result=$result>$before?$before:$result;
2893: } else {
2894: $result=$result>$before?$result:$before;
2895: }
2896: } elsif (($_ eq '&') || ($_ eq '|')) {
2897: $operand=$_;
2898: } else {
2899: my $new=directcondval($_);
2900: if ($operand eq '&') {
2901: $result=$result>$new?$new:$result;
2902: } else {
2903: $result=$result>$new?$result:$new;
2904: }
2905: }
2906: }
2907: }
2908: }
2909: return $result;
2910: }
2911:
2912: # ---------------------------------------------------- Devalidate courseresdata
2913:
2914: sub devalidatecourseresdata {
2915: my ($coursenum,$coursedomain)=@_;
2916: my $hashid=$coursenum.':'.$coursedomain;
2917: delete $courseresdatacache{$hashid.'.time'};
2918: }
2919:
2920: # --------------------------------------------------- Course Resourcedata Query
2921:
2922: sub courseresdata {
2923: my ($coursenum,$coursedomain,@which)=@_;
2924: my $coursehom=&homeserver($coursenum,$coursedomain);
2925: my $hashid=$coursenum.':'.$coursedomain;
2926: my $dodump=0;
2927: if (!defined($courseresdatacache{$hashid.'.time'})) {
2928: $dodump=1;
2929: } else {
2930: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2931: }
2932: if ($dodump) {
2933: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2934: my ($tmp) = keys(%dumpreply);
2935: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2936: $courseresdatacache{$hashid.'.time'}=time;
2937: $courseresdatacache{$hashid}=\%dumpreply;
2938: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
2939: return $tmp;
2940: }
2941: }
2942: foreach my $item (@which) {
2943: if (defined($courseresdatacache{$hashid}->{$item})) {
2944: return $courseresdatacache{$hashid}->{$item};
2945: }
2946: }
2947: return undef;
2948: }
2949:
2950: # --------------------------------------------------------- Value of a Variable
2951:
2952: sub EXT {
2953: my ($varname,$symbparm,$udom,$uname,)=@_;
2954:
2955: unless ($varname) { return ''; }
2956: #get real user name/domain, courseid and symb
2957: my $courseid;
2958: if (!($uname && $udom)) {
2959: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2960: if (!$symbparm) { $symbparm=$cursymb; }
2961: } else {
2962: $courseid=$ENV{'request.course.id'};
2963: }
2964: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2965: my $rest;
2966: if (defined($therest[0])) {
2967: $rest=join('.',@therest);
2968: } else {
2969: $rest='';
2970: }
2971:
2972: my $qualifierrest=$qualifier;
2973: if ($rest) { $qualifierrest.='.'.$rest; }
2974: my $spacequalifierrest=$space;
2975: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2976: if ($realm eq 'user') {
2977: # --------------------------------------------------------------- user.resource
2978: if ($space eq 'resource') {
2979: if (defined($Apache::lonhomework::parsing_a_problem)) {
2980: return $Apache::lonhomework::history{$qualifierrest};
2981: } else {
2982: my %restored=&restore($symbparm,$courseid,$udom,$uname);
2983: return $restored{$qualifierrest};
2984: }
2985: # ----------------------------------------------------------------- user.access
2986: } elsif ($space eq 'access') {
2987: # FIXME - not supporting calls for a specific user
2988: return &allowed($qualifier,$rest);
2989: # ------------------------------------------ user.preferences, user.environment
2990: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2991: if (($uname eq $ENV{'user.name'}) &&
2992: ($udom eq $ENV{'user.domain'})) {
2993: return $ENV{join('.',('environment',$qualifierrest))};
2994: } else {
2995: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2996: return $returnhash{$qualifierrest};
2997: }
2998: # ----------------------------------------------------------------- user.course
2999: } elsif ($space eq 'course') {
3000: # FIXME - not supporting calls for a specific user
3001: return $ENV{join('.',('request.course',$qualifier))};
3002: # ------------------------------------------------------------------- user.role
3003: } elsif ($space eq 'role') {
3004: # FIXME - not supporting calls for a specific user
3005: my ($role,$where)=split(/\./,$ENV{'request.role'});
3006: if ($qualifier eq 'value') {
3007: return $role;
3008: } elsif ($qualifier eq 'extent') {
3009: return $where;
3010: }
3011: # ----------------------------------------------------------------- user.domain
3012: } elsif ($space eq 'domain') {
3013: return $udom;
3014: # ------------------------------------------------------------------- user.name
3015: } elsif ($space eq 'name') {
3016: return $uname;
3017: # ---------------------------------------------------- Any other user namespace
3018: } else {
3019: my %reply=&get($space,[$qualifierrest],$udom,$uname);
3020: return $reply{$qualifierrest};
3021: }
3022: } elsif ($realm eq 'query') {
3023: # ---------------------------------------------- pull stuff out of query string
3024: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
3025: return $ENV{'form.'.$space};
3026: } elsif ($realm eq 'request') {
3027: # ------------------------------------------------------------- request.browser
3028: if ($space eq 'browser') {
3029: return $ENV{'browser.'.$qualifier};
3030: # ------------------------------------------------------------ request.filename
3031: } else {
3032: return $ENV{'request.'.$spacequalifierrest};
3033: }
3034: } elsif ($realm eq 'course') {
3035: # ---------------------------------------------------------- course.description
3036: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3037: } elsif ($realm eq 'resource') {
3038:
3039: if ($courseid eq $ENV{'request.course.id'}) {
3040:
3041: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3042:
3043: # ----------------------------------------------------- Cascading lookup scheme
3044: if (!$symbparm) { $symbparm=&symbread(); }
3045: my $symbp=$symbparm;
3046: my $mapp=(split(/\_\_\_/,$symbp))[0];
3047:
3048: my $symbparm=$symbp.'.'.$spacequalifierrest;
3049: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3050:
3051: my $section;
3052: if (($ENV{'user.name'} eq $uname) &&
3053: ($ENV{'user.domain'} eq $udom)) {
3054: $section=$ENV{'request.course.sec'};
3055: } else {
3056: $section=&usection($udom,$uname,$courseid);
3057: }
3058:
3059: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3060: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3061: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3062:
3063: my $courselevel=$courseid.'.'.$spacequalifierrest;
3064: my $courselevelr=$courseid.'.'.$symbparm;
3065: my $courselevelm=$courseid.'.'.$mapparm;
3066:
3067: # ----------------------------------------------------------- first, check user
3068: #most student don't have any data set, check if there is some data
3069: #every thirty minutes
3070: if (!
3071: (exists($ENV{'cache.studentresdata'})
3072: && (($ENV{'cache.studentresdata'}+1800) > time))) {
3073: my %resourcedata=&get('resourcedata',
3074: [$courselevelr,$courselevelm,$courselevel],
3075: $udom,$uname);
3076: my ($tmp)=keys(%resourcedata);
3077: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3078: if ($resourcedata{$courselevelr}) {
3079: return $resourcedata{$courselevelr}; }
3080: if ($resourcedata{$courselevelm}) {
3081: return $resourcedata{$courselevelm}; }
3082: if ($resourcedata{$courselevel}) {
3083: return $resourcedata{$courselevel}; }
3084: } else {
3085: if ($tmp!~/No such file/) {
3086: &logthis("<font color=blue>WARNING:".
3087: " Trying to get resource data for ".
3088: $uname." at ".$udom.": ".
3089: $tmp."</font>");
3090: } elsif ($tmp=~/error:No such file/) {
3091: $ENV{'cache.studentresdata'}=time;
3092: &appenv(('cache.studentresdata'=>
3093: $ENV{'cache.studentresdata'}));
3094: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3095: return $tmp;
3096: }
3097: }
3098: }
3099:
3100: # -------------------------------------------------------- second, check course
3101:
3102: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3103: $ENV{'course.'.$courseid.'.domain'},
3104: ($seclevelr,$seclevelm,$seclevel,
3105: $courselevelr,$courselevelm,
3106: $courselevel));
3107: if (defined($coursereply)) { return $coursereply; }
3108:
3109: # ------------------------------------------------------ third, check map parms
3110: my %parmhash=();
3111: my $thisparm='';
3112: if (tie(%parmhash,'GDBM_File',
3113: $ENV{'request.course.fn'}.'_parms.db',
3114: &GDBM_READER(),0640)) {
3115: $thisparm=$parmhash{$symbparm};
3116: untie(%parmhash);
3117: }
3118: if ($thisparm) { return $thisparm; }
3119: }
3120: # --------------------------------------------- last, look in resource metadata
3121:
3122: $spacequalifierrest=~s/\./\_/;
3123: my $filename;
3124: if (!$symbparm) { $symbparm=&symbread(); }
3125: if ($symbparm) {
3126: $filename=(split(/\_\_\_/,$symbparm))[2];
3127: } else {
3128: $filename=$ENV{'request.filename'};
3129: }
3130: my $metadata=&metadata($filename,$spacequalifierrest);
3131: if (defined($metadata)) { return $metadata; }
3132: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3133: if (defined($metadata)) { return $metadata; }
3134:
3135: # ------------------------------------------------------------------ Cascade up
3136: unless ($space eq '0') {
3137: my @parts=split(/_/,$space);
3138: my $id=pop(@parts);
3139: my $part=join('_',@parts);
3140: if ($part eq '') { $part='0'; }
3141: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3142: $symbparm,$udom,$uname);
3143: if (defined($partgeneral)) { return $partgeneral; }
3144: }
3145:
3146: # ---------------------------------------------------- Any other user namespace
3147: } elsif ($realm eq 'environment') {
3148: # ----------------------------------------------------------------- environment
3149: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3150: return $ENV{'environment.'.$spacequalifierrest};
3151: } else {
3152: my %returnhash=&userenvironment($udom,$uname,
3153: $spacequalifierrest);
3154: return $returnhash{$spacequalifierrest};
3155: }
3156: } elsif ($realm eq 'system') {
3157: # ----------------------------------------------------------------- system.time
3158: if ($space eq 'time') {
3159: return time;
3160: }
3161: }
3162: return '';
3163: }
3164:
3165: sub add_prefix_and_part {
3166: my ($prefix,$part)=@_;
3167: my $keyroot;
3168: if (defined($prefix) && $prefix !~ /^__/) {
3169: # prefix that has a part already
3170: $keyroot=$prefix;
3171: } elsif (defined($prefix)) {
3172: # prefix that is missing a part
3173: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3174: } else {
3175: # no prefix at all
3176: if (defined($part)) { $keyroot='_'.$part; }
3177: }
3178: return $keyroot;
3179: }
3180:
3181: # ---------------------------------------------------------------- Get metadata
3182:
3183: sub metadata {
3184: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3185:
3186: $uri=&declutter($uri);
3187: # if it is a non metadata possible uri return quickly
3188: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3189: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
3190: return '';
3191: }
3192: my $filename=$uri;
3193: $uri=~s/\.meta$//;
3194: #
3195: # Is the metadata already cached?
3196: # Look at timestamp of caching
3197: # Everything is cached by the main uri, libraries are never directly cached
3198: #
3199: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3200: #
3201: # Is this a recursive call for a library?
3202: #
3203: if ($liburi) {
3204: $liburi=&declutter($liburi);
3205: $filename=$liburi;
3206: }
3207: my %metathesekeys=();
3208: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3209: my $metastring=&getfile(&filelocation('',&clutter($filename)));
3210: my $parser=HTML::LCParser->new(\$metastring);
3211: my $token;
3212: undef %metathesekeys;
3213: while ($token=$parser->get_token) {
3214: if ($token->[0] eq 'S') {
3215: if (defined($token->[2]->{'package'})) {
3216: #
3217: # This is a package - get package info
3218: #
3219: my $package=$token->[2]->{'package'};
3220: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3221: if (defined($token->[2]->{'id'})) {
3222: $keyroot.='_'.$token->[2]->{'id'};
3223: }
3224: if ($metacache{$uri.':packages'}) {
3225: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3226: } else {
3227: $metacache{$uri.':packages'}=$package.$keyroot;
3228: }
3229: foreach (keys %packagetab) {
3230: if ($_=~/^$package\&/) {
3231: my ($pack,$name,$subp)=split(/\&/,$_);
3232: my $value=$packagetab{$_};
3233: my $part=$keyroot;
3234: $part=~s/^\_//;
3235: if ($subp eq 'display') {
3236: $value.=' [Part: '.$part.']';
3237: }
3238: my $unikey='parameter'.$keyroot.'_'.$name;
3239: if ($subp eq 'default') { $unikey='parameter_0_'.$name; }
3240: $metathesekeys{$unikey}=1;
3241: $metacache{$uri.':'.$unikey.'.part'}=$part;
3242: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3243: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3244: }
3245: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3246: $metacache{$uri.':'.$unikey}=
3247: $metacache{$uri.':'.$unikey.'.default'}
3248: }
3249: }
3250: }
3251: } else {
3252: #
3253: # This is not a package - some other kind of start tag
3254: #
3255: my $entry=$token->[1];
3256: my $unikey;
3257: if ($entry eq 'import') {
3258: $unikey='';
3259: } else {
3260: $unikey=$entry;
3261: }
3262: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3263:
3264: if (defined($token->[2]->{'id'})) {
3265: $unikey.='_'.$token->[2]->{'id'};
3266: }
3267:
3268: if ($entry eq 'import') {
3269: #
3270: # Importing a library here
3271: #
3272: if ($depthcount<20) {
3273: my $location=$parser->get_text('/import');
3274: my $dir=$filename;
3275: $dir=~s|[^/]*$||;
3276: $location=&filelocation($dir,$location);
3277: foreach (sort(split(/\,/,&metadata($uri,'keys',
3278: $location,$unikey,
3279: $depthcount+1)))) {
3280: $metathesekeys{$_}=1;
3281: }
3282: }
3283: } else {
3284:
3285: if (defined($token->[2]->{'name'})) {
3286: $unikey.='_'.$token->[2]->{'name'};
3287: }
3288: $metathesekeys{$unikey}=1;
3289: foreach (@{$token->[3]}) {
3290: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3291: }
3292: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3293: my $default=$metacache{$uri.':'.$unikey.'.default'};
3294: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3295: # only ws inside the tag, and not in default, so use default
3296: # as value
3297: $metacache{$uri.':'.$unikey}=$default;
3298: } else {
3299: # either something interesting inside the tag or default
3300: # uninteresting
3301: $metacache{$uri.':'.$unikey}=$internaltext;
3302: }
3303: # end of not-a-package not-a-library import
3304: }
3305: # end of not-a-package start tag
3306: }
3307: # the next is the end of "start tag"
3308: }
3309: }
3310: # are there custom rights to evaluate
3311: if ($metacache{$uri.':copyright'} eq 'custom') {
3312:
3313: #
3314: # Importing a rights file here
3315: #
3316: unless ($depthcount) {
3317: my $location=$metacache{$uri.':customdistributionfile'};
3318: my $dir=$filename;
3319: $dir=~s|[^/]*$||;
3320: $location=&filelocation($dir,$location);
3321: foreach (sort(split(/\,/,&metadata($uri,'keys',
3322: $location,'_rights',
3323: $depthcount+1)))) {
3324: $metathesekeys{$_}=1;
3325: }
3326: }
3327: }
3328: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3329: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3330: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3331: $metacache{$uri.':cachedtimestamp'}=time;
3332: # this is the end of "was not already recently cached
3333: }
3334: return $metacache{$uri.':'.$what};
3335: }
3336:
3337: sub metadata_generate_part0 {
3338: my ($metadata,$metacache,$uri) = @_;
3339: my %allnames;
3340: foreach my $metakey (sort keys %$metadata) {
3341: if ($metakey=~/^parameter\_(.*)/) {
3342: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3343: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3344: if (! exists($$metadata{'parameter_0_'.$name})) {
3345: $allnames{$name}=$part;
3346: }
3347: }
3348: }
3349: foreach my $name (keys(%allnames)) {
3350: $$metadata{"parameter_0_$name"}=1;
3351: my $key="$uri:parameter_0_$name";
3352: $$metacache{"$key.part"}='0';
3353: $$metacache{"$key.name"}=$name;
3354: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3355: $allnames{$name}.'_'.$name.
3356: '.type'};
3357: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3358: '.display'};
3359: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3360: $olddis=~s/$expr/\[Part: 0\]/;
3361: $$metacache{"$key.display"}=$olddis;
3362: }
3363: }
3364:
3365: # ------------------------------------------------- Get the title of a resource
3366:
3367: sub gettitle {
3368: my $urlsymb=shift;
3369: my $symb=&symbread($urlsymb);
3370: unless ($symb) {
3371: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3372: return &metadata($urlsymb,'title');
3373: }
3374: if ($titlecache{$symb}) { return $titlecache{$symb}; }
3375: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3376: my $title='';
3377: my %bighash;
3378: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3379: &GDBM_READER(),0640)) {
3380: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3381: $title=$bighash{'title_'.$mapid.'.'.$resid};
3382: untie %bighash;
3383: }
3384: if ($title) {
3385: $titlecache{$symb}=$title;
3386: return $title;
3387: } else {
3388: return &metadata($urlsymb,'title');
3389: }
3390: }
3391:
3392: # ------------------------------------------------- Update symbolic store links
3393:
3394: sub symblist {
3395: my ($mapname,%newhash)=@_;
3396: $mapname=declutter($mapname);
3397: my %hash;
3398: if (($ENV{'request.course.fn'}) && (%newhash)) {
3399: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3400: &GDBM_WRCREAT(),0640)) {
3401: foreach (keys %newhash) {
3402: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3403: }
3404: if (untie(%hash)) {
3405: return 'ok';
3406: }
3407: }
3408: }
3409: return 'error';
3410: }
3411:
3412: # --------------------------------------------------------------- Verify a symb
3413:
3414: sub symbverify {
3415: my ($symb,$thisfn)=@_;
3416: $thisfn=&declutter($thisfn);
3417: # direct jump to resource in page or to a sequence - will construct own symbs
3418: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3419: # check URL part
3420: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3421: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3422:
3423: $symb=&symbclean($symb);
3424:
3425: my %bighash;
3426: my $okay=0;
3427: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3428: &GDBM_READER(),0640)) {
3429: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3430: unless ($ids) {
3431: $ids=$bighash{'ids_/'.$thisfn};
3432: }
3433: if ($ids) {
3434: # ------------------------------------------------------------------- Has ID(s)
3435: foreach (split(/\,/,$ids)) {
3436: my ($mapid,$resid)=split(/\./,$_);
3437: if (
3438: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3439: eq $symb) {
3440: $okay=1;
3441: }
3442: }
3443: }
3444: untie(%bighash);
3445: }
3446: return $okay;
3447: }
3448:
3449: # --------------------------------------------------------------- Clean-up symb
3450:
3451: sub symbclean {
3452: my $symb=shift;
3453:
3454: # remove version from map
3455: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3456:
3457: # remove version from URL
3458: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3459:
3460: return $symb;
3461: }
3462:
3463: # ------------------------------------------------------ Return symb list entry
3464:
3465: sub symbread {
3466: my ($thisfn,$donotrecurse)=@_;
3467: # no filename provided? try from environment
3468: unless ($thisfn) {
3469: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3470: $thisfn=$ENV{'request.filename'};
3471: }
3472: # is that filename actually a symb? Verify, clean, and return
3473: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3474: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3475: }
3476: $thisfn=declutter($thisfn);
3477: my %hash;
3478: my %bighash;
3479: my $syval='';
3480: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3481: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3482: &GDBM_READER(),0640)) {
3483: $syval=$hash{$thisfn};
3484: untie(%hash);
3485: }
3486: # ---------------------------------------------------------- There was an entry
3487: if ($syval) {
3488: unless ($syval=~/\_\d+$/) {
3489: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3490: &appenv('request.ambiguous' => $thisfn);
3491: return '';
3492: }
3493: $syval.=$1;
3494: }
3495: } else {
3496: # ------------------------------------------------------- Was not in symb table
3497: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3498: &GDBM_READER(),0640)) {
3499: # ---------------------------------------------- Get ID(s) for current resource
3500: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3501: unless ($ids) {
3502: $ids=$bighash{'ids_/'.$thisfn};
3503: }
3504: unless ($ids) {
3505: # alias?
3506: $ids=$bighash{'mapalias_'.$thisfn};
3507: }
3508: if ($ids) {
3509: # ------------------------------------------------------------------- Has ID(s)
3510: my @possibilities=split(/\,/,$ids);
3511: if ($#possibilities==0) {
3512: # ----------------------------------------------- There is only one possibility
3513: my ($mapid,$resid)=split(/\./,$ids);
3514: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3515: } elsif (!$donotrecurse) {
3516: # ------------------------------------------ There is more than one possibility
3517: my $realpossible=0;
3518: foreach (@possibilities) {
3519: my $file=$bighash{'src_'.$_};
3520: if (&allowed('bre',$file)) {
3521: my ($mapid,$resid)=split(/\./,$_);
3522: if ($bighash{'map_type_'.$mapid} ne 'page') {
3523: $realpossible++;
3524: $syval=declutter($bighash{'map_id_'.$mapid}).
3525: '___'.$resid;
3526: }
3527: }
3528: }
3529: if ($realpossible!=1) { $syval=''; }
3530: } else {
3531: $syval='';
3532: }
3533: }
3534: untie(%bighash)
3535: }
3536: }
3537: if ($syval) {
3538: return &symbclean($syval.'___'.$thisfn);
3539: }
3540: }
3541: &appenv('request.ambiguous' => $thisfn);
3542: return '';
3543: }
3544:
3545: # ---------------------------------------------------------- Return random seed
3546:
3547: sub numval {
3548: my $txt=shift;
3549: $txt=~tr/A-J/0-9/;
3550: $txt=~tr/a-j/0-9/;
3551: $txt=~tr/K-T/0-9/;
3552: $txt=~tr/k-t/0-9/;
3553: $txt=~tr/U-Z/0-5/;
3554: $txt=~tr/u-z/0-5/;
3555: $txt=~s/\D//g;
3556: return int($txt);
3557: }
3558:
3559: sub rndseed {
3560: my ($symb,$courseid,$domain,$username)=@_;
3561: if (!$symb) {
3562: unless ($symb=&symbread()) { return time; }
3563: }
3564: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3565: if (!$domain) {$domain=$ENV{'user.domain'};}
3566: if (!$username) {$username=$ENV{'user.name'};}
3567: {
3568: use integer;
3569: my $symbchck=unpack("%32C*",$symb) << 27;
3570: my $symbseed=numval($symb) << 22;
3571: my $namechck=unpack("%32C*",$username) << 17;
3572: my $nameseed=numval($username) << 12;
3573: my $domainseed=unpack("%32C*",$domain) << 7;
3574: my $courseseed=unpack("%32C*",$courseid);
3575: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3576: #uncommenting these lines can break things!
3577: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3578: #&Apache::lonxml::debug("rndseed :$num:$symb");
3579: return $num;
3580: }
3581: }
3582:
3583: sub ireceipt {
3584: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3585: my $cuname=unpack("%32C*",$funame);
3586: my $cudom=unpack("%32C*",$fudom);
3587: my $cucourseid=unpack("%32C*",$fucourseid);
3588: my $cusymb=unpack("%32C*",$fusymb);
3589: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3590: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3591: ($cunique%$cuname+
3592: $cunique%$cudom+
3593: $cusymb%$cuname+
3594: $cusymb%$cudom+
3595: $cucourseid%$cuname+
3596: $cucourseid%$cudom);
3597: }
3598:
3599: sub receipt {
3600: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3601: return &ireceipt($name,$domain,$courseid,$symb);
3602: }
3603:
3604: # ------------------------------------------------------------ Serves up a file
3605: # returns either the contents of the file or a -1
3606: sub getfile {
3607: my $file=shift;
3608: if ($file=~/^\/*uploaded\//) { # user file
3609: my $ua=new LWP::UserAgent;
3610: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3611: my $response=$ua->request($request);
3612: if ($response->is_success()) {
3613: return $response->content;
3614: } else {
3615: return -1;
3616: }
3617: } else { # normal file from res space
3618: &repcopy($file);
3619: if (! -e $file ) { return -1; };
3620: my $fh=Apache::File->new($file);
3621: my $a='';
3622: while (<$fh>) { $a .=$_; }
3623: return $a;
3624: }
3625: }
3626:
3627: sub filelocation {
3628: my ($dir,$file) = @_;
3629: my $location;
3630: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3631: if ($file=~m:^/~:) { # is a contruction space reference
3632: $location = $file;
3633: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3634: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3635: $location=$file;
3636: } else {
3637: $file=~s/^$perlvar{'lonDocRoot'}//;
3638: $file=~s:^/*res::;
3639: if ( !( $file =~ m:^/:) ) {
3640: $location = $dir. '/'.$file;
3641: } else {
3642: $location = '/home/httpd/html/res'.$file;
3643: }
3644: }
3645: $location=~s://+:/:g; # remove duplicate /
3646: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3647: return $location;
3648: }
3649:
3650: sub hreflocation {
3651: my ($dir,$file)=@_;
3652: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3653: my $finalpath=filelocation($dir,$file);
3654: $finalpath=~s/^\/home\/httpd\/html//;
3655: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3656: return $finalpath;
3657: } else {
3658: return $file;
3659: }
3660: }
3661:
3662: # ------------------------------------------------------------- Declutters URLs
3663:
3664: sub declutter {
3665: my $thisfn=shift;
3666: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3667: $thisfn=~s/^\///;
3668: $thisfn=~s/^res\///;
3669: $thisfn=~s/\?.+$//;
3670: return $thisfn;
3671: }
3672:
3673: # ------------------------------------------------------------- Clutter up URLs
3674:
3675: sub clutter {
3676: my $thisfn='/'.&declutter(shift);
3677: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3678: $thisfn='/res'.$thisfn;
3679: }
3680: return $thisfn;
3681: }
3682:
3683: # -------------------------------------------------------- Escape Special Chars
3684:
3685: sub escape {
3686: my $str=shift;
3687: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3688: return $str;
3689: }
3690:
3691: # ----------------------------------------------------- Un-Escape Special Chars
3692:
3693: sub unescape {
3694: my $str=shift;
3695: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3696: return $str;
3697: }
3698:
3699: # ================================================================ Main Program
3700:
3701: sub goodbye {
3702: &logthis("Starting Shut down");
3703: &flushcourselogs();
3704: &logthis("Shutting down");
3705: }
3706:
3707: BEGIN {
3708: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3709: unless ($readit) {
3710: {
3711: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3712:
3713: while (my $configline=<$config>) {
3714: if ($configline =~ /^[^\#]*PerlSetVar/) {
3715: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3716: chomp($varvalue);
3717: $perlvar{$varname}=$varvalue;
3718: }
3719: }
3720: }
3721: {
3722: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3723:
3724: while (my $configline=<$config>) {
3725: if ($configline =~ /^[^\#]*PerlSetVar/) {
3726: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3727: chomp($varvalue);
3728: $perlvar{$varname}=$varvalue;
3729: }
3730: }
3731: }
3732:
3733: # ------------------------------------------------------------ Read domain file
3734: {
3735: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
3736: '/domain.tab');
3737: %domaindescription = ();
3738: %domain_auth_def = ();
3739: %domain_auth_arg_def = ();
3740: if ($fh) {
3741: while (<$fh>) {
3742: next if /^\#/;
3743: chomp;
3744: my ($domain, $domain_description, $def_auth, $def_auth_arg)
3745: = split(/:/,$_,4);
3746: $domain_auth_def{$domain}=$def_auth;
3747: $domain_auth_arg_def{$domain}=$def_auth_arg;
3748: $domaindescription{$domain}=$domain_description;
3749: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
3750: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
3751: }
3752: }
3753: }
3754:
3755:
3756: # ------------------------------------------------------------- Read hosts file
3757: {
3758: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3759:
3760: while (my $configline=<$config>) {
3761: next if ($configline =~ /^(\#|\s*$)/);
3762: chomp($configline);
3763: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3764: if ($id && $domain && $role && $name && $ip) {
3765: $hostname{$id}=$name;
3766: $hostdom{$id}=$domain;
3767: $hostip{$id}=$ip;
3768: $iphost{$ip}=$id;
3769: if ($role eq 'library') { $libserv{$id}=$name; }
3770: } else {
3771: if ($configline) {
3772: &logthis("Skipping hosts.tab line -$configline-");
3773: }
3774: }
3775: }
3776: }
3777:
3778: # ------------------------------------------------------ Read spare server file
3779: {
3780: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3781:
3782: while (my $configline=<$config>) {
3783: chomp($configline);
3784: if ($configline) {
3785: $spareid{$configline}=1;
3786: }
3787: }
3788: }
3789: # ------------------------------------------------------------ Read permissions
3790: {
3791: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3792:
3793: while (my $configline=<$config>) {
3794: chomp($configline);
3795: if ($configline) {
3796: my ($role,$perm)=split(/ /,$configline);
3797: if ($perm ne '') { $pr{$role}=$perm; }
3798: }
3799: }
3800: }
3801:
3802: # -------------------------------------------- Read plain texts for permissions
3803: {
3804: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3805:
3806: while (my $configline=<$config>) {
3807: chomp($configline);
3808: if ($configline) {
3809: my ($short,$plain)=split(/:/,$configline);
3810: if ($plain ne '') { $prp{$short}=$plain; }
3811: }
3812: }
3813: }
3814:
3815: # ---------------------------------------------------------- Read package table
3816: {
3817: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3818:
3819: while (my $configline=<$config>) {
3820: chomp($configline);
3821: my ($short,$plain)=split(/:/,$configline);
3822: my ($pack,$name)=split(/\&/,$short);
3823: if ($plain ne '') {
3824: $packagetab{$pack.'&'.$name.'&name'}=$name;
3825: $packagetab{$short}=$plain;
3826: }
3827: }
3828: }
3829:
3830: # ------------- set up temporary directory
3831: {
3832: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
3833:
3834: }
3835:
3836: %metacache=();
3837:
3838: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
3839: $dumpcount=0;
3840:
3841: &logtouch();
3842: &logthis('<font color=yellow>INFO: Read configuration</font>');
3843: $readit=1;
3844: }
3845: }
3846:
3847: 1;
3848: __END__
3849:
3850: =pod
3851:
3852: =head1 NAME
3853:
3854: Apache::lonnet - Subroutines to ask questions about things in the network.
3855:
3856: =head1 SYNOPSIS
3857:
3858: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3859:
3860: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3861:
3862: Common parameters:
3863:
3864: =over 4
3865:
3866: =item *
3867:
3868: $uname : an internal username (if $cname expecting a course Id specifically)
3869:
3870: =item *
3871:
3872: $udom : a domain (if $cdom expecting a course's domain specifically)
3873:
3874: =item *
3875:
3876: $symb : a resource instance identifier
3877:
3878: =item *
3879:
3880: $namespace : the name of a .db file that contains the data needed or
3881: being set.
3882:
3883: =back
3884:
3885: =head1 INTRODUCTION
3886:
3887: This module provides subroutines which interact with the
3888: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3889: - classes
3890: - users
3891: - resources
3892:
3893: For many of these objects you can also use this to store data about
3894: them or modify them in various ways.
3895:
3896: This is part of the LearningOnline Network with CAPA project
3897: described at http://www.lon-capa.org.
3898:
3899: =head1 RETURN MESSAGES
3900:
3901: =over 4
3902:
3903: =item *
3904:
3905: con_lost : unable to contact remote host
3906:
3907: =item *
3908:
3909: con_delayed : unable to contact remote host, message will be delivered
3910: when the connection is brought back up
3911:
3912: =item *
3913:
3914: con_failed : unable to contact remote host and unable to save message
3915: for later delivery
3916:
3917: =item *
3918:
3919: error: : an error a occured, a description of the error follows the :
3920:
3921: =item *
3922:
3923: no_such_host : unable to fund a host associated with the user/domain
3924: that was requested
3925:
3926: =back
3927:
3928: =head1 PUBLIC SUBROUTINES
3929:
3930: =head2 Session Environment Functions
3931:
3932: =over 4
3933:
3934: =item *
3935:
3936: appenv(%hash) : the value of %hash is written to the user envirnoment
3937: file, and will be restored for each access this user makes during this
3938: session, also modifies the %ENV for the current process
3939:
3940: =item *
3941:
3942: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3943:
3944: =back
3945:
3946: =head2 User Information
3947:
3948: =over 4
3949:
3950: =item *
3951:
3952: queryauthenticate($uname,$udom) : try to determine user's current
3953: authentication scheme
3954:
3955: =item *
3956:
3957: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3958: servers (first use the current one), $upass should be the users password
3959:
3960: =item *
3961:
3962: homeserver($uname,$udom) : find the server which has the user's
3963: directory and files (there must be only one), this caches the answer,
3964: and also caches if there is a borken connection.
3965:
3966: =item *
3967:
3968: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3969: unique resource in a domain, there must be only 1 ID per username, and
3970: only 1 username per ID in a specific domain) (returns hash:
3971: id=>name,id=>name)
3972:
3973: =item *
3974:
3975: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3976: name=>id,name=>id)
3977:
3978: =item *
3979:
3980: idput($udom,%ids) : store away a list of names and associated IDs
3981:
3982: =item *
3983:
3984: rolesinit($udom,$username,$authhost) : get user privileges
3985:
3986: =item *
3987:
3988: usection($udom,$uname,$cname) : finds the section of student in the
3989: course $cname, return section name/number or '' for "not in course"
3990: and '-1' for "no section"
3991:
3992: =item *
3993:
3994: userenvironment($udom,$uname,@what) : gets the values of the keys
3995: passed in @what from the requested user's environment, returns a hash
3996:
3997: =back
3998:
3999: =head2 User Roles
4000:
4001: =over 4
4002:
4003: =item *
4004:
4005: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
4006: actions
4007: F: full access
4008: U,I,K: authentication modes (cxx only)
4009: '': forbidden
4010: 1: user needs to choose course
4011: 2: browse allowed
4012:
4013: =item *
4014:
4015: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4016: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4017: and course level
4018:
4019: =item *
4020:
4021: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4022: explanation of a user role term
4023:
4024: =back
4025:
4026: =head2 User Modification
4027:
4028: =over 4
4029:
4030: =item *
4031:
4032: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4033: user for the level given by URL. Optional start and end dates (leave empty
4034: string or zero for "no date")
4035:
4036: =item *
4037:
4038: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4039: change a users, password, possible return values are: ok,
4040: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4041: refused
4042:
4043: =item *
4044:
4045: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
4046:
4047: =item *
4048:
4049: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4050: modify user
4051:
4052: =item *
4053:
4054: modifystudent
4055:
4056: modify a students enrollment and identification information.
4057: The course id is resolved based on the current users environment.
4058: This means the envoking user must be a course coordinator or otherwise
4059: associated with a course.
4060:
4061: This call is essentially a wrapper for lonnet::modifyuser and
4062: lonnet::modify_student_enrollment
4063:
4064: Inputs:
4065:
4066: =over 4
4067:
4068: =item B<$udom> Students loncapa domain
4069:
4070: =item B<$uname> Students loncapa login name
4071:
4072: =item B<$uid> Students id/student number
4073:
4074: =item B<$umode> Students authentication mode
4075:
4076: =item B<$upass> Students password
4077:
4078: =item B<$first> Students first name
4079:
4080: =item B<$middle> Students middle name
4081:
4082: =item B<$last> Students last name
4083:
4084: =item B<$gene> Students generation
4085:
4086: =item B<$usec> Students section in course
4087:
4088: =item B<$end> Unix time of the roles expiration
4089:
4090: =item B<$start> Unix time of the roles start date
4091:
4092: =item B<$forceid> If defined, allow $uid to be changed
4093:
4094: =item B<$desiredhome> server to use as home server for student
4095:
4096: =back
4097:
4098: =item *
4099:
4100: modify_student_enrollment
4101:
4102: Change a students enrollment status in a class. The environment variable
4103: 'role.request.course' must be defined for this function to proceed.
4104:
4105: Inputs:
4106:
4107: =over 4
4108:
4109: =item $udom, students domain
4110:
4111: =item $uname, students name
4112:
4113: =item $uid, students user id
4114:
4115: =item $first, students first name
4116:
4117: =item $middle
4118:
4119: =item $last
4120:
4121: =item $gene
4122:
4123: =item $usec
4124:
4125: =item $end
4126:
4127: =item $start
4128:
4129: =back
4130:
4131:
4132: =item *
4133:
4134: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4135: custom role; give a custom role to a user for the level given by URL. Specify
4136: name and domain of role author, and role name
4137:
4138: =item *
4139:
4140: revokerole($udom,$uname,$url,$role) : revoke a role for url
4141:
4142: =item *
4143:
4144: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4145:
4146: =back
4147:
4148: =head2 Course Infomation
4149:
4150: =over 4
4151:
4152: =item *
4153:
4154: coursedescription($courseid) : course description
4155:
4156: =item *
4157:
4158: courseresdata($coursenum,$coursedomain,@which) : request for current
4159: parameter setting for a specific course, @what should be a list of
4160: parameters to ask about. This routine caches answers for 5 minutes.
4161:
4162: =back
4163:
4164: =head2 Course Modification
4165:
4166: =over 4
4167:
4168: =item *
4169:
4170: writecoursepref($courseid,%prefs) : write preferences (environment
4171: database) for a course
4172:
4173: =item *
4174:
4175: createcourse($udom,$description,$url) : make/modify course
4176:
4177: =back
4178:
4179: =head2 Resource Subroutines
4180:
4181: =over 4
4182:
4183: =item *
4184:
4185: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
4186:
4187: =item *
4188:
4189: repcopy($filename) : subscribes to the requested file, and attempts to
4190: replicate from the owning library server, Might return
4191: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4192: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4193: resource. Expects the local filesystem pathname
4194: (/home/httpd/html/res/....)
4195:
4196: =back
4197:
4198: =head2 Resource Information
4199:
4200: =over 4
4201:
4202: =item *
4203:
4204: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4205: a vairety of different possible values, $varname should be a request
4206: string, and the other parameters can be used to specify who and what
4207: one is asking about.
4208:
4209: Possible values for $varname are environment.lastname (or other item
4210: from the envirnment hash), user.name (or someother aspect about the
4211: user), resource.0.maxtries (or some other part and parameter of a
4212: resource)
4213:
4214: =item *
4215:
4216: directcondval($number) : get current value of a condition; reads from a state
4217: string
4218:
4219: =item *
4220:
4221: condval($condidx) : value of condition index based on state
4222:
4223: =item *
4224:
4225: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4226: resource's metadata, $what should be either a specific key, or either
4227: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4228: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4229:
4230: this function automatically caches all requests
4231:
4232: =item *
4233:
4234: metadata_query($query,$custom,$customshow) : make a metadata query against the
4235: network of library servers; returns file handle of where SQL and regex results
4236: will be stored for query
4237:
4238: =item *
4239:
4240: symbread($filename) : return symbolic list entry (filename argument optional);
4241: returns the data handle
4242:
4243: =item *
4244:
4245: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4246: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4247: failure, user must be in a course, as it assumes the existance of the
4248: course initi hash, and uses $ENV('request.course.id'}
4249:
4250:
4251: =item *
4252:
4253: symbclean($symb) : removes versions numbers from a symb, returns the
4254: cleaned symb
4255:
4256: =item *
4257:
4258: is_on_map($uri) : checks if the $uri is somewhere on the current
4259: course map, user must be in a course for it to work.
4260:
4261: =item *
4262:
4263: numval($salt) : return random seed value (addend for rndseed)
4264:
4265: =item *
4266:
4267: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4268: a random seed, all arguments are optional, if they aren't sent it uses the
4269: environment to derive them. Note: if symb isn't sent and it can't get one
4270: from &symbread it will use the current time as its return value
4271:
4272: =item *
4273:
4274: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4275: unfakeable, receipt
4276:
4277: =item *
4278:
4279: receipt() : API to ireceipt working off of ENV values; given out to users
4280:
4281: =item *
4282:
4283: countacc($url) : count the number of accesses to a given URL
4284:
4285: =item *
4286:
4287: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4288:
4289: =item *
4290:
4291: checkin($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 $tcrsid)
4292:
4293: =item *
4294:
4295: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4296:
4297: =item *
4298:
4299: devalidate($symb) : devalidate temporary spreadsheet calculations,
4300: forcing spreadsheet to reevaluate the resource scores next time.
4301:
4302: =back
4303:
4304: =head2 Storing/Retreiving Data
4305:
4306: =over 4
4307:
4308: =item *
4309:
4310: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4311: for this url; hashref needs to be given and should be a \%hashname; the
4312: remaining args aren't required and if they aren't passed or are '' they will
4313: be derived from the ENV
4314:
4315: =item *
4316:
4317: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4318: uses critical subroutine
4319:
4320: =item *
4321:
4322: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4323: all args are optional
4324:
4325: =item *
4326:
4327: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4328: works very similar to store/cstore, but all data is stored in a
4329: temporary location and can be reset using tmpreset, $storehash should
4330: be a hash reference, returns nothing on success
4331:
4332: =item *
4333:
4334: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4335: similar to restore, but all data is stored in a temporary location and
4336: can be reset using tmpreset. Returns a hash of values on success,
4337: error string otherwise.
4338:
4339: =item *
4340:
4341: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4342: deltes all keys for $symb form the temporary storage hash.
4343:
4344: =item *
4345:
4346: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4347: reference filled in from namesp ($udom and $uname are optional)
4348:
4349: =item *
4350:
4351: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4352: namesp ($udom and $uname are optional)
4353:
4354: =item *
4355:
4356: dump($namespace,$udom,$uname,$regexp) :
4357: dumps the complete (or key matching regexp) namespace into a hash
4358: ($udom, $uname and $regexp are optional)
4359:
4360: =item *
4361:
4362: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4363: ($udom and $uname are optional)
4364:
4365: =item *
4366:
4367: cput($namespace,$storehash,$udom,$uname) : critical put
4368: ($udom and $uname are optional)
4369:
4370: =item *
4371:
4372: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4373: reference filled in from namesp (encrypts the return communication)
4374: ($udom and $uname are optional)
4375:
4376: =item *
4377:
4378: log($udom,$name,$home,$message) : write to permanent log for user; use
4379: critical subroutine
4380:
4381: =back
4382:
4383: =head2 Network Status Functions
4384:
4385: =over 4
4386:
4387: =item *
4388:
4389: dirlist($uri) : return directory list based on URI
4390:
4391: =item *
4392:
4393: spareserver() : find server with least workload from spare.tab
4394:
4395: =back
4396:
4397: =head2 Apache Request
4398:
4399: =over 4
4400:
4401: =item *
4402:
4403: ssi($url,%hash) : server side include, does a complete request cycle on url to
4404: localhost, posts hash
4405:
4406: =back
4407:
4408: =head2 Data to String to Data
4409:
4410: =over 4
4411:
4412: =item *
4413:
4414: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4415: and '&' separators, supports elements that are arrayrefs and hashrefs
4416:
4417: =item *
4418:
4419: hashref2str($hashref) : convert a hashref into a string complete with
4420: escaping and '=' and '&' separators, supports elements that are
4421: arrayrefs and hashrefs
4422:
4423: =item *
4424:
4425: arrayref2str($arrayref) : convert an arrayref into a string complete
4426: with escaping and '&' separators, supports elements that are arrayrefs
4427: and hashrefs
4428:
4429: =item *
4430:
4431: str2hash($string) : convert string to hash using unescaping and
4432: splitting on '=' and '&', supports elements that are arrayrefs and
4433: hashrefs
4434:
4435: =item *
4436:
4437: str2array($string) : convert string to hash using unescaping and
4438: splitting on '&', supports elements that are arrayrefs and hashrefs
4439:
4440: =back
4441:
4442: =head2 Logging Routines
4443:
4444: =over 4
4445:
4446: These routines allow one to make log messages in the lonnet.log and
4447: lonnet.perm logfiles.
4448:
4449: =item *
4450:
4451: logtouch() : make sure the logfile, lonnet.log, exists
4452:
4453: =item *
4454:
4455: logthis() : append message to the normal lonnet.log file, it gets
4456: preiodically rolled over and deleted.
4457:
4458: =item *
4459:
4460: logperm() : append a permanent message to lonnet.perm.log, this log
4461: file never gets deleted by any automated portion of the system, only
4462: messages of critical importance should go in here.
4463:
4464: =back
4465:
4466: =head2 General File Helper Routines
4467:
4468: =over 4
4469:
4470: =item *
4471:
4472: getfile($file) : returns the entire contents of a file or -1; it
4473: properly subscribes to and replicates the file if neccessary.
4474:
4475: =item *
4476:
4477: filelocation($dir,$file) : returns file system location of a file
4478: based on URI; meant to be "fairly clean" absolute reference, $dir is a
4479: directory that relative $file lookups are to looked in ($dir of /a/dir
4480: and a file of ../bob will become /a/bob)
4481:
4482: =item *
4483:
4484: hreflocation($dir,$file) : returns file system location or a URL; same as
4485: filelocation except for hrefs
4486:
4487: =item *
4488:
4489: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
4490:
4491: =back
4492:
4493: =head2 HTTP Helper Routines
4494:
4495: =over 4
4496:
4497: =item *
4498:
4499: escape() : unpack non-word characters into CGI-compatible hex codes
4500:
4501: =item *
4502:
4503: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
4504:
4505: =back
4506:
4507: =head1 PRIVATE SUBROUTINES
4508:
4509: =head2 Underlying communication routines (Shouldn't call)
4510:
4511: =over 4
4512:
4513: =item *
4514:
4515: subreply() : tries to pass a message to lonc, returns con_lost if incapable
4516:
4517: =item *
4518:
4519: reply() : uses subreply to send a message to remote machine, logs all failures
4520:
4521: =item *
4522:
4523: critical() : passes a critical message to another server; if cannot
4524: get through then place message in connection buffer directory and
4525: returns con_delayed, if incapable of saving message, returns
4526: con_failed
4527:
4528: =item *
4529:
4530: reconlonc() : tries to reconnect lonc client processes.
4531:
4532: =back
4533:
4534: =head2 Resource Access Logging
4535:
4536: =over 4
4537:
4538: =item *
4539:
4540: flushcourselogs() : flush (save) buffer logs and access logs
4541:
4542: =item *
4543:
4544: courselog($what) : save message for course in hash
4545:
4546: =item *
4547:
4548: courseacclog($what) : save message for course using &courselog(). Perform
4549: special processing for specific resource types (problems, exams, quizzes, etc).
4550:
4551: =item *
4552:
4553: goodbye() : flush course logs and log shutting down; it is called in srm.conf
4554: as a PerlChildExitHandler
4555:
4556: =back
4557:
4558: =head2 Other
4559:
4560: =over 4
4561:
4562: =item *
4563:
4564: symblist($mapname,%newhash) : update symbolic storage links
4565:
4566: =back
4567:
4568: =cut
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