File:
[LON-CAPA] /
loncom /
lonnet /
perl /
lonnet.pm
Revision
1.299:
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Tue Oct 22 21:49:10 2002 UTC (21 years, 9 months ago) by
matthew
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MAIN
CVS tags:
HEAD
Fix to devalidate so it goes into the proper file to devalidate a students
data in the course level spreadsheet.
<lecture>
Interestingly enough, this misspelled filename was wrong from the first day
it was in the code (march 2001) and remained so until today. Let this be a
reminder to all of us to check our new features to make sure they work.
</lecture>
1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.299 2002/10/22 21:49:10 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 02/27/01 Scott Harrison
51: # 3/2 Gerd Kortemeyer
52: # 3/15,3/19 Scott Harrison
53: # 3/19,3/20 Gerd Kortemeyer
54: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
55: # 5/26,5/28 Gerd Kortemeyer
56: # 5/30 H. K. Ng
57: # 6/1 Gerd Kortemeyer
58: # July Guy Albertelli
59: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
60: # 10/2 Gerd Kortemeyer
61: # 10/5,10/10,11/13,11/15 Scott Harrison
62: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
63: # 12/5 Matthew Hall
64: # 12/5 Guy Albertelli
65: # 12/6,12/7,12/12 Gerd Kortemeyer
66: # 12/18 Scott Harrison
67: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
68: # YEAR=2002
69: # 1/4,2/4,2/7 Gerd Kortemeyer
70: #
71: ###
72:
73: package Apache::lonnet;
74:
75: use strict;
76: use Apache::File;
77: use LWP::UserAgent();
78: use HTTP::Headers;
79: use vars
80: qw(%perlvar %hostname %homecache %badServerCache %hostip %spareid %hostdom
81: %libserv %pr %prp %metacache %packagetab
82: %courselogs %accesshash $processmarker $dumpcount
83: %coursedombuf %coursehombuf %courseresdatacache %domaindescription);
84: use IO::Socket;
85: use GDBM_File;
86: use Apache::Constants qw(:common :http);
87: use HTML::LCParser;
88: use Fcntl qw(:flock);
89: use Apache::loncoursedata;
90:
91: my $readit;
92:
93: # --------------------------------------------------------------------- Logging
94:
95: sub logtouch {
96: my $execdir=$perlvar{'lonDaemons'};
97: unless (-e "$execdir/logs/lonnet.log") {
98: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
99: close $fh;
100: }
101: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
102: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
103: }
104:
105: sub logthis {
106: my $message=shift;
107: my $execdir=$perlvar{'lonDaemons'};
108: my $now=time;
109: my $local=localtime($now);
110: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
111: print $fh "$local ($$): $message\n";
112: return 1;
113: }
114:
115: sub logperm {
116: my $message=shift;
117: my $execdir=$perlvar{'lonDaemons'};
118: my $now=time;
119: my $local=localtime($now);
120: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
121: print $fh "$now:$message:$local\n";
122: return 1;
123: }
124:
125: # -------------------------------------------------- Non-critical communication
126: sub subreply {
127: my ($cmd,$server)=@_;
128: my $peerfile="$perlvar{'lonSockDir'}/$server";
129: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
130: Type => SOCK_STREAM,
131: Timeout => 10)
132: or return "con_lost";
133: print $client "$cmd\n";
134: my $answer=<$client>;
135: if (!$answer) { $answer="con_lost"; }
136: chomp($answer);
137: return $answer;
138: }
139:
140: sub reply {
141: my ($cmd,$server)=@_;
142: unless (defined($hostname{$server})) { return 'no_such_host'; }
143: my $answer=subreply($cmd,$server);
144: if ($answer eq 'con_lost') {
145: #sleep 5;
146: #$answer=subreply($cmd,$server);
147: #if ($answer eq 'con_lost') {
148: # &logthis("Second attempt con_lost on $server");
149: # my $peerfile="$perlvar{'lonSockDir'}/$server";
150: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
151: # Type => SOCK_STREAM,
152: # Timeout => 10)
153: # or return "con_lost";
154: # &logthis("Killing socket");
155: # print $client "close_connection_exit\n";
156: #sleep 5;
157: # $answer=subreply($cmd,$server);
158: #}
159: }
160: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
161: &logthis("<font color=blue>WARNING:".
162: " $cmd to $server returned $answer</font>");
163: }
164: return $answer;
165: }
166:
167: # ----------------------------------------------------------- Send USR1 to lonc
168:
169: sub reconlonc {
170: my $peerfile=shift;
171: &logthis("Trying to reconnect for $peerfile");
172: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
173: if (my $fh=Apache::File->new("$loncfile")) {
174: my $loncpid=<$fh>;
175: chomp($loncpid);
176: if (kill 0 => $loncpid) {
177: &logthis("lonc at pid $loncpid responding, sending USR1");
178: kill USR1 => $loncpid;
179: sleep 1;
180: if (-e "$peerfile") { return; }
181: &logthis("$peerfile still not there, give it another try");
182: sleep 5;
183: if (-e "$peerfile") { return; }
184: &logthis(
185: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
186: } else {
187: &logthis(
188: "<font color=blue>WARNING:".
189: " lonc at pid $loncpid not responding, giving up</font>");
190: }
191: } else {
192: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
193: }
194: }
195:
196: # ------------------------------------------------------ Critical communication
197:
198: sub critical {
199: my ($cmd,$server)=@_;
200: unless ($hostname{$server}) {
201: &logthis("<font color=blue>WARNING:".
202: " Critical message to unknown server ($server)</font>");
203: return 'no_such_host';
204: }
205: my $answer=reply($cmd,$server);
206: if ($answer eq 'con_lost') {
207: my $pingreply=reply('ping',$server);
208: &reconlonc("$perlvar{'lonSockDir'}/$server");
209: my $pongreply=reply('pong',$server);
210: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
211: $answer=reply($cmd,$server);
212: if ($answer eq 'con_lost') {
213: my $now=time;
214: my $middlename=$cmd;
215: $middlename=substr($middlename,0,16);
216: $middlename=~s/\W//g;
217: my $dfilename=
218: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
219: {
220: my $dfh;
221: if ($dfh=Apache::File->new(">$dfilename")) {
222: print $dfh "$cmd\n";
223: }
224: }
225: sleep 2;
226: my $wcmd='';
227: {
228: my $dfh;
229: if ($dfh=Apache::File->new("$dfilename")) {
230: $wcmd=<$dfh>;
231: }
232: }
233: chomp($wcmd);
234: if ($wcmd eq $cmd) {
235: &logthis("<font color=blue>WARNING: ".
236: "Connection buffer $dfilename: $cmd</font>");
237: &logperm("D:$server:$cmd");
238: return 'con_delayed';
239: } else {
240: &logthis("<font color=red>CRITICAL:"
241: ." Critical connection failed: $server $cmd</font>");
242: &logperm("F:$server:$cmd");
243: return 'con_failed';
244: }
245: }
246: }
247: return $answer;
248: }
249:
250: # ---------------------------------------------------------- Append Environment
251:
252: sub appenv {
253: my %newenv=@_;
254: foreach (keys %newenv) {
255: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
256: &logthis("<font color=blue>WARNING: ".
257: "Attempt to modify environment ".$_." to ".$newenv{$_}
258: .'</font>');
259: delete($newenv{$_});
260: } else {
261: $ENV{$_}=$newenv{$_};
262: }
263: }
264:
265: my $lockfh;
266: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
267: return 'error: '.$!;
268: }
269: unless (flock($lockfh,LOCK_EX)) {
270: &logthis("<font color=blue>WARNING: ".
271: 'Could not obtain exclusive lock in appenv: '.$!);
272: $lockfh->close();
273: return 'error: '.$!;
274: }
275:
276: my @oldenv;
277: {
278: my $fh;
279: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
280: return 'error: '.$!;
281: }
282: @oldenv=<$fh>;
283: $fh->close();
284: }
285: for (my $i=0; $i<=$#oldenv; $i++) {
286: chomp($oldenv[$i]);
287: if ($oldenv[$i] ne '') {
288: my ($name,$value)=split(/=/,$oldenv[$i]);
289: unless (defined($newenv{$name})) {
290: $newenv{$name}=$value;
291: }
292: }
293: }
294: {
295: my $fh;
296: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
297: return 'error';
298: }
299: my $newname;
300: foreach $newname (keys %newenv) {
301: print $fh "$newname=$newenv{$newname}\n";
302: }
303: $fh->close();
304: }
305:
306: $lockfh->close();
307: return 'ok';
308: }
309: # ----------------------------------------------------- Delete from Environment
310:
311: sub delenv {
312: my $delthis=shift;
313: my %newenv=();
314: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
315: &logthis("<font color=blue>WARNING: ".
316: "Attempt to delete from environment ".$delthis);
317: return 'error';
318: }
319: my @oldenv;
320: {
321: my $fh;
322: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
323: return 'error';
324: }
325: unless (flock($fh,LOCK_SH)) {
326: &logthis("<font color=blue>WARNING: ".
327: 'Could not obtain shared lock in delenv: '.$!);
328: $fh->close();
329: return 'error: '.$!;
330: }
331: @oldenv=<$fh>;
332: $fh->close();
333: }
334: {
335: my $fh;
336: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
337: return 'error';
338: }
339: unless (flock($fh,LOCK_EX)) {
340: &logthis("<font color=blue>WARNING: ".
341: 'Could not obtain exclusive lock in delenv: '.$!);
342: $fh->close();
343: return 'error: '.$!;
344: }
345: foreach (@oldenv) {
346: unless ($_=~/^$delthis/) { print $fh $_; }
347: }
348: $fh->close();
349: }
350: return 'ok';
351: }
352:
353: # ------------------------------------------ Fight off request when overloaded
354:
355: sub overloaderror {
356: my ($r,$checkserver)=@_;
357: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
358: my $loadavg;
359: if ($checkserver eq $perlvar{'lonHostID'}) {
360: my $loadfile=Apache::File->new('/proc/loadavg');
361: $loadavg=<$loadfile>;
362: $loadavg =~ s/\s.*//g;
363: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
364: } else {
365: $loadavg=&reply('load',$checkserver);
366: }
367: my $overload=$loadavg-100;
368: if ($overload>0) {
369: $r->err_headers_out->{'Retry-After'}=$overload;
370: $r->log_error('Overload of '.$overload.' on '.$checkserver);
371: return 413;
372: }
373: return '';
374: }
375:
376: # ------------------------------ Find server with least workload from spare.tab
377:
378: sub spareserver {
379: my $loadpercent = shift;
380: my $tryserver;
381: my $spareserver='';
382: my $lowestserver=$loadpercent;
383: foreach $tryserver (keys %spareid) {
384: my $answer=reply('load',$tryserver);
385: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
386: $spareserver="http://$hostname{$tryserver}";
387: $lowestserver=$answer;
388: }
389: }
390: return $spareserver;
391: }
392:
393: # --------------------------------------------- Try to change a user's password
394:
395: sub changepass {
396: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
397: $currentpass = &escape($currentpass);
398: $newpass = &escape($newpass);
399: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
400: $server);
401: if (! $answer) {
402: &logthis("No reply on password change request to $server ".
403: "by $uname in domain $udom.");
404: } elsif ($answer =~ "^ok") {
405: &logthis("$uname in $udom successfully changed their password ".
406: "on $server.");
407: } elsif ($answer =~ "^pwchange_failure") {
408: &logthis("$uname in $udom was unable to change their password ".
409: "on $server. The action was blocked by either lcpasswd ".
410: "or pwchange");
411: } elsif ($answer =~ "^non_authorized") {
412: &logthis("$uname in $udom did not get their password correct when ".
413: "attempting to change it on $server.");
414: } elsif ($answer =~ "^auth_mode_error") {
415: &logthis("$uname in $udom attempted to change their password despite ".
416: "not being locally or internally authenticated on $server.");
417: } elsif ($answer =~ "^unknown_user") {
418: &logthis("$uname in $udom attempted to change their password ".
419: "on $server but were unable to because $server is not ".
420: "their home server.");
421: } elsif ($answer =~ "^refused") {
422: &logthis("$server refused to change $uname in $udom password because ".
423: "it was sent an unencrypted request to change the password.");
424: }
425: return $answer;
426: }
427:
428: # ----------------------- Try to determine user's current authentication scheme
429:
430: sub queryauthenticate {
431: my ($uname,$udom)=@_;
432: if (($perlvar{'lonRole'} eq 'library') &&
433: ($udom eq $perlvar{'lonDefDomain'})) {
434: my $answer=reply("encrypt:currentauth:$udom:$uname",
435: $perlvar{'lonHostID'});
436: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
437: if (length($answer)) {
438: return $answer;
439: }
440: else {
441: &logthis("User $uname at $udom lacks an authentication mechanism");
442: return 'no_host';
443: }
444: }
445: }
446:
447: my $tryserver;
448: foreach $tryserver (keys %libserv) {
449: if ($hostdom{$tryserver} eq $udom) {
450: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
451: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
452: if (length($answer)) {
453: return $answer;
454: }
455: else {
456: &logthis("User $uname at $udom lacks an authentication mechanism");
457: return 'no_host';
458: }
459: }
460: }
461: }
462: &logthis("User $uname at $udom lacks an authentication mechanism");
463: return 'no_host';
464: }
465:
466: # --------- Try to authenticate user from domain's lib servers (first this one)
467:
468: sub authenticate {
469: my ($uname,$upass,$udom)=@_;
470: $upass=escape($upass);
471: $uname=~s/\W//g;
472: if (($perlvar{'lonRole'} eq 'library') &&
473: ($udom eq $perlvar{'lonDefDomain'})) {
474: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
475: if ($answer =~ /authorized/) {
476: if ($answer eq 'authorized') {
477: &logthis("User $uname at $udom authorized by local server");
478: return $perlvar{'lonHostID'};
479: }
480: if ($answer eq 'non_authorized') {
481: &logthis("User $uname at $udom rejected by local server");
482: return 'no_host';
483: }
484: }
485: }
486:
487: my $tryserver;
488: foreach $tryserver (keys %libserv) {
489: if ($hostdom{$tryserver} eq $udom) {
490: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
491: if ($answer =~ /authorized/) {
492: if ($answer eq 'authorized') {
493: &logthis("User $uname at $udom authorized by $tryserver");
494: return $tryserver;
495: }
496: if ($answer eq 'non_authorized') {
497: &logthis("User $uname at $udom rejected by $tryserver");
498: return 'no_host';
499: }
500: }
501: }
502: }
503: &logthis("User $uname at $udom could not be authenticated");
504: return 'no_host';
505: }
506:
507: # ---------------------- Find the homebase for a user from domain's lib servers
508:
509: sub homeserver {
510: my ($uname,$udom,$ignoreBadCache)=@_;
511: my $index="$uname:$udom";
512: if ($homecache{$index}) {
513: return "$homecache{$index}";
514: }
515: my $tryserver;
516: foreach $tryserver (keys %libserv) {
517: next if ($ignoreBadCache ne 'true' &&
518: exists($badServerCache{$tryserver}));
519: if ($hostdom{$tryserver} eq $udom) {
520: my $answer=reply("home:$udom:$uname",$tryserver);
521: if ($answer eq 'found') {
522: $homecache{$index}=$tryserver;
523: return $tryserver;
524: } elsif ($answer eq 'no_host') {
525: $badServerCache{$tryserver}=1;
526: }
527: }
528: }
529: return 'no_host';
530: }
531:
532: # ------------------------------------- Find the usernames behind a list of IDs
533:
534: sub idget {
535: my ($udom,@ids)=@_;
536: my %returnhash=();
537:
538: my $tryserver;
539: foreach $tryserver (keys %libserv) {
540: if ($hostdom{$tryserver} eq $udom) {
541: my $idlist=join('&',@ids);
542: $idlist=~tr/A-Z/a-z/;
543: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
544: my @answer=();
545: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
546: @answer=split(/\&/,$reply);
547: } ;
548: my $i;
549: for ($i=0;$i<=$#ids;$i++) {
550: if ($answer[$i]) {
551: $returnhash{$ids[$i]}=$answer[$i];
552: }
553: }
554: }
555: }
556: return %returnhash;
557: }
558:
559: # ------------------------------------- Find the IDs behind a list of usernames
560:
561: sub idrget {
562: my ($udom,@unames)=@_;
563: my %returnhash=();
564: foreach (@unames) {
565: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
566: }
567: return %returnhash;
568: }
569:
570: # ------------------------------- Store away a list of names and associated IDs
571:
572: sub idput {
573: my ($udom,%ids)=@_;
574: my %servers=();
575: foreach (keys %ids) {
576: my $uhom=&homeserver($_,$udom);
577: if ($uhom ne 'no_host') {
578: my $id=&escape($ids{$_});
579: $id=~tr/A-Z/a-z/;
580: my $unam=&escape($_);
581: if ($servers{$uhom}) {
582: $servers{$uhom}.='&'.$id.'='.$unam;
583: } else {
584: $servers{$uhom}=$id.'='.$unam;
585: }
586: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
587: }
588: }
589: foreach (keys %servers) {
590: &critical('idput:'.$udom.':'.$servers{$_},$_);
591: }
592: }
593:
594: # ------------------------------------- Find the section of student in a course
595:
596: sub getsection {
597: my ($udom,$unam,$courseid)=@_;
598: $courseid=~s/\_/\//g;
599: $courseid=~s/^(\w)/\/$1/;
600: my %Pending;
601: my %Expired;
602: #
603: # Each role can either have not started yet (pending), be active,
604: # or have expired.
605: #
606: # If there is an active role, we are done.
607: #
608: # If there is more than one role which has not started yet,
609: # choose the one which will start sooner
610: # If there is one role which has not started yet, return it.
611: #
612: # If there is more than one expired role, choose the one which ended last.
613: # If there is a role which has expired, return it.
614: #
615: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
616: &homeserver($unam,$udom)))) {
617: my ($key,$value)=split(/\=/,$_);
618: $key=&unescape($key);
619: next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
620: my $section=$1;
621: if ($key eq $courseid.'_st') { $section=''; }
622: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
623: my $now=time;
624: if (defined($end) && ($now > $end)) {
625: $Expired{$end}=$section;
626: next;
627: }
628: if (defined($start) && ($now < $start)) {
629: $Pending{$start}=$section;
630: next;
631: }
632: return $section;
633: }
634: #
635: # Presumedly there will be few matching roles from the above
636: # loop and the sorting time will be negligible.
637: if (scalar(keys(%Pending))) {
638: my ($time) = sort {$a <=> $b} keys(%Pending);
639: return $Pending{$time};
640: }
641: if (scalar(keys(%Expired))) {
642: my @sorted = sort {$a <=> $b} keys(%Expired);
643: my $time = pop(@sorted);
644: return $Expired{$time};
645: }
646: return '-1';
647: }
648:
649: sub usection {
650: my ($udom,$unam,$courseid)=@_;
651: $courseid=~s/\_/\//g;
652: $courseid=~s/^(\w)/\/$1/;
653: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
654: &homeserver($unam,$udom)))) {
655: my ($key,$value)=split(/\=/,$_);
656: $key=&unescape($key);
657: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
658: my $section=$1;
659: if ($key eq $courseid.'_st') { $section=''; }
660: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
661: my $now=time;
662: my $notactive=0;
663: if ($start) {
664: if ($now<$start) { $notactive=1; }
665: }
666: if ($end) {
667: if ($now>$end) { $notactive=1; }
668: }
669: unless ($notactive) { return $section; }
670: }
671: }
672: return '-1';
673: }
674:
675: # ------------------------------------- Read an entry from a user's environment
676:
677: sub userenvironment {
678: my ($udom,$unam,@what)=@_;
679: my %returnhash=();
680: my @answer=split(/\&/,
681: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
682: &homeserver($unam,$udom)));
683: my $i;
684: for ($i=0;$i<=$#what;$i++) {
685: $returnhash{$what[$i]}=&unescape($answer[$i]);
686: }
687: return %returnhash;
688: }
689:
690: # -------------------------------------------------------------------- New chat
691:
692: sub chatsend {
693: my ($newentry,$anon)=@_;
694: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
695: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
696: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
697: &reply('chatsend:'.$cdom.':'.$cnum.':'.
698: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
699: &escape($newentry)),$chome);
700: }
701:
702: # ------------------------------------------ Find current version of a resource
703:
704: sub getversion {
705: my $fname=&clutter(shift);
706: unless ($fname=~/^\/res\//) { return -1; }
707: return ¤tversion(&filelocation('',$fname));
708: }
709:
710: sub currentversion {
711: my $fname=shift;
712: my $author=$fname;
713: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
714: my ($udom,$uname)=split(/\//,$author);
715: my $home=homeserver($uname,$udom);
716: if ($home eq 'no_host') {
717: return -1;
718: }
719: my $answer=reply("currentversion:$fname",$home);
720: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
721: return -1;
722: }
723: return $answer;
724: }
725:
726: # ----------------------------- Subscribe to a resource, return URL if possible
727:
728: sub subscribe {
729: my $fname=shift;
730: my $author=$fname;
731: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
732: my ($udom,$uname)=split(/\//,$author);
733: my $home=homeserver($uname,$udom);
734: if ($home eq 'no_host') {
735: return 'not_found';
736: }
737: my $answer=reply("sub:$fname",$home);
738: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
739: $answer.=' by '.$home;
740: }
741: return $answer;
742: }
743:
744: # -------------------------------------------------------------- Replicate file
745:
746: sub repcopy {
747: my $filename=shift;
748: $filename=~s/\/+/\//g;
749: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
750: my $transname="$filename.in.transfer";
751: if ((-e $filename) || (-e $transname)) { return OK; }
752: my $remoteurl=subscribe($filename);
753: if ($remoteurl =~ /^con_lost by/) {
754: &logthis("Subscribe returned $remoteurl: $filename");
755: return HTTP_SERVICE_UNAVAILABLE;
756: } elsif ($remoteurl eq 'not_found') {
757: &logthis("Subscribe returned not_found: $filename");
758: return HTTP_NOT_FOUND;
759: } elsif ($remoteurl =~ /^rejected by/) {
760: &logthis("Subscribe returned $remoteurl: $filename");
761: return FORBIDDEN;
762: } elsif ($remoteurl eq 'directory') {
763: return OK;
764: } else {
765: my $author=$filename;
766: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
767: my ($udom,$uname)=split(/\//,$author);
768: my $home=homeserver($uname,$udom);
769: unless ($home eq $perlvar{'lonHostID'}) {
770: my @parts=split(/\//,$filename);
771: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
772: if ($path ne "$perlvar{'lonDocRoot'}/res") {
773: &logthis("Malconfiguration for replication: $filename");
774: return HTTP_BAD_REQUEST;
775: }
776: my $count;
777: for ($count=5;$count<$#parts;$count++) {
778: $path.="/$parts[$count]";
779: if ((-e $path)!=1) {
780: mkdir($path,0777);
781: }
782: }
783: my $ua=new LWP::UserAgent;
784: my $request=new HTTP::Request('GET',"$remoteurl");
785: my $response=$ua->request($request,$transname);
786: if ($response->is_error()) {
787: unlink($transname);
788: my $message=$response->status_line;
789: &logthis("<font color=blue>WARNING:"
790: ." LWP get: $message: $filename</font>");
791: return HTTP_SERVICE_UNAVAILABLE;
792: } else {
793: if ($remoteurl!~/\.meta$/) {
794: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
795: my $mresponse=$ua->request($mrequest,$filename.'.meta');
796: if ($mresponse->is_error()) {
797: unlink($filename.'.meta');
798: &logthis(
799: "<font color=yellow>INFO: No metadata: $filename</font>");
800: }
801: }
802: rename($transname,$filename);
803: return OK;
804: }
805: }
806: }
807: }
808:
809: # --------------------------------------------------------- Server Side Include
810:
811: sub ssi {
812:
813: my ($fn,%form)=@_;
814:
815: my $ua=new LWP::UserAgent;
816:
817: my $request;
818:
819: if (%form) {
820: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
821: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
822: } else {
823: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
824: }
825:
826: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
827: my $response=$ua->request($request);
828:
829: return $response->content;
830: }
831:
832: # ------- Add a token to a remote URI's query string to vouch for access rights
833:
834: sub tokenwrapper {
835: my $uri=shift;
836: $uri=~s/^http\:\/\/([^\/]+)//;
837: $uri=~s/^\///;
838: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
839: my $token=$1;
840: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
841: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
842: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
843: (($uri=~/\?/)?'&':'?').'token='.$token;
844: } else {
845: return '/adm/notfound.html';
846: }
847: }
848:
849: # --------------- Take an uploaded file and put it into the userfiles directory
850: # input: name of form element, coursedoc=1 means this is for the course
851: # output: url of file in userspace
852:
853: sub userfileupload {
854: my ($formname,$coursedoc)=@_;
855: my $fname=$ENV{'form.'.$formname.'.filename'};
856: $fname=~s/\\/\//g;
857: $fname=~s/^.*\/([^\/]+)$/$1/;
858: unless ($fname) { return 'error: no uploaded file'; }
859: chop($ENV{'form.'.$formname});
860: # Create the directory if not present
861: my $docuname='';
862: my $docudom='';
863: my $docuhome='';
864: if ($coursedoc) {
865: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
866: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
867: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
868: } else {
869: $docuname=$ENV{'user.name'};
870: $docudom=$ENV{'user.domain'};
871: $docuhome=$ENV{'user.home'};
872: }
873: return
874: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
875: }
876:
877: sub finishuserfileupload {
878: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
879: my $path=$docudom.'/'.$docuname.'/';
880: my $filepath=$perlvar{'lonDocRoot'};
881: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
882: my $count;
883: for ($count=4;$count<=$#parts;$count++) {
884: $filepath.="/$parts[$count]";
885: if ((-e $filepath)!=1) {
886: mkdir($filepath,0777);
887: }
888: }
889: # Save the file
890: {
891: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
892: print $fh $ENV{'form.'.$formname};
893: }
894: # Notify homeserver to grep it
895: #
896:
897: my $fetchresult=
898: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
899: if ($fetchresult eq 'ok') {
900: #
901: # Return the URL to it
902: return '/uploaded/'.$path.$fname;
903: } else {
904: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
905: ' to host '.$docuhome.': '.$fetchresult);
906: return '/adm/notfound.html';
907: }
908: }
909:
910: # ------------------------------------------------------------------------- Log
911:
912: sub log {
913: my ($dom,$nam,$hom,$what)=@_;
914: return critical("log:$dom:$nam:$what",$hom);
915: }
916:
917: # ------------------------------------------------------------------ Course Log
918:
919: sub flushcourselogs {
920: &logthis('Flushing course log buffers');
921: foreach (keys %courselogs) {
922: my $crsid=$_;
923: if (&reply('log:'.$coursedombuf{$crsid}.':'.
924: &escape($courselogs{$crsid}),
925: $coursehombuf{$crsid}) eq 'ok') {
926: delete $courselogs{$crsid};
927: } else {
928: &logthis('Failed to flush log buffer for '.$crsid);
929: if (length($courselogs{$crsid})>40000) {
930: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
931: " exceeded maximum size, deleting.</font>");
932: delete $courselogs{$crsid};
933: }
934: }
935: }
936: &logthis('Flushing access logs');
937: foreach (keys %accesshash) {
938: my $entry=$_;
939: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
940: my %temphash=($entry => $accesshash{$entry});
941: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
942: delete $accesshash{$entry};
943: }
944: }
945: $dumpcount++;
946: }
947:
948: sub courselog {
949: my $what=shift;
950: $what=time.':'.$what;
951: unless ($ENV{'request.course.id'}) { return ''; }
952: $coursedombuf{$ENV{'request.course.id'}}=
953: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
954: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
955: $coursehombuf{$ENV{'request.course.id'}}=
956: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
957: if (defined $courselogs{$ENV{'request.course.id'}}) {
958: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
959: } else {
960: $courselogs{$ENV{'request.course.id'}}.=$what;
961: }
962: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
963: &flushcourselogs();
964: }
965: }
966:
967: sub courseacclog {
968: my $fnsymb=shift;
969: unless ($ENV{'request.course.id'}) { return ''; }
970: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
971: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
972: $what.=':POST';
973: foreach (keys %ENV) {
974: if ($_=~/^form\.(.*)/) {
975: $what.=':'.$1.'='.$ENV{$_};
976: }
977: }
978: }
979: &courselog($what);
980: }
981:
982: sub countacc {
983: my $url=&declutter(shift);
984: unless ($ENV{'request.course.id'}) { return ''; }
985: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
986: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
987: if (defined($accesshash{$key})) {
988: $accesshash{$key}++;
989: } else {
990: $accesshash{$key}=1;
991: }
992: }
993:
994: # ----------------------------------------------------------- Check out an item
995:
996: sub checkout {
997: my ($symb,$tuname,$tudom,$tcrsid)=@_;
998: my $now=time;
999: my $lonhost=$perlvar{'lonHostID'};
1000: my $infostr=&escape(
1001: 'CHECKOUTTOKEN&'.
1002: $tuname.'&'.
1003: $tudom.'&'.
1004: $tcrsid.'&'.
1005: $symb.'&'.
1006: $now.'&'.$ENV{'REMOTE_ADDR'});
1007: my $token=&reply('tmpput:'.$infostr,$lonhost);
1008: if ($token=~/^error\:/) {
1009: &logthis("<font color=blue>WARNING: ".
1010: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1011: "</font>");
1012: return '';
1013: }
1014:
1015: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1016: $token=~tr/a-z/A-Z/;
1017:
1018: my %infohash=('resource.0.outtoken' => $token,
1019: 'resource.0.checkouttime' => $now,
1020: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1021:
1022: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1023: return '';
1024: } else {
1025: &logthis("<font color=blue>WARNING: ".
1026: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1027: "</font>");
1028: }
1029:
1030: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1031: &escape('Checkout '.$infostr.' - '.
1032: $token)) ne 'ok') {
1033: return '';
1034: } else {
1035: &logthis("<font color=blue>WARNING: ".
1036: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1037: "</font>");
1038: }
1039: return $token;
1040: }
1041:
1042: # ------------------------------------------------------------ Check in an item
1043:
1044: sub checkin {
1045: my $token=shift;
1046: my $now=time;
1047: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1048: $lonhost=~tr/A-Z/a-z/;
1049: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1050: $dtoken=~s/\W/\_/g;
1051: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1052: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1053:
1054: unless (($tuname) && ($tudom)) {
1055: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1056: return '';
1057: }
1058:
1059: unless (&allowed('mgr',$tcrsid)) {
1060: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1061: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1062: return '';
1063: }
1064:
1065: my %infohash=('resource.0.intoken' => $token,
1066: 'resource.0.checkintime' => $now,
1067: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1068:
1069: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1070: return '';
1071: }
1072:
1073: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1074: &escape('Checkin - '.$token)) ne 'ok') {
1075: return '';
1076: }
1077:
1078: return ($symb,$tuname,$tudom,$tcrsid);
1079: }
1080:
1081: # --------------------------------------------- Set Expire Date for Spreadsheet
1082:
1083: sub expirespread {
1084: my ($uname,$udom,$stype,$usymb)=@_;
1085: my $cid=$ENV{'request.course.id'};
1086: if ($cid) {
1087: my $now=time;
1088: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1089: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1090: $ENV{'course.'.$cid.'.num'}.
1091: ':nohist_expirationdates:'.
1092: &escape($key).'='.$now,
1093: $ENV{'course.'.$cid.'.home'})
1094: }
1095: return 'ok';
1096: }
1097:
1098: # ----------------------------------------------------- Devalidate Spreadsheets
1099:
1100: sub devalidate {
1101: my $symb=shift;
1102: my $cid=$ENV{'request.course.id'};
1103: if ($cid) {
1104: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
1105: my $status=
1106: &del('nohist_calculatedsheets',
1107: [$key.'studentcalc'],
1108: $ENV{'course.'.$cid.'.domain'},
1109: $ENV{'course.'.$cid.'.num'})
1110: .' '.
1111: &del('nohist_calculatedsheets_'.$cid,
1112: [$key.'assesscalc:'.$symb]);
1113: unless ($status eq 'ok ok') {
1114: &logthis('Could not devalidate spreadsheet '.
1115: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
1116: $symb.': '.$status);
1117: }
1118: }
1119: }
1120:
1121: sub get_scalar {
1122: my ($string,$end) = @_;
1123: my $value;
1124: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1125: $value = $1;
1126: } elsif ($$string =~ s/^([^&]*?)&//) {
1127: $value = $1;
1128: }
1129: return &unescape($value);
1130: }
1131:
1132: sub array2str {
1133: my (@array) = @_;
1134: my $result=&arrayref2str(\@array);
1135: $result=~s/^__ARRAY_REF__//;
1136: $result=~s/__END_ARRAY_REF__$//;
1137: return $result;
1138: }
1139:
1140: sub arrayref2str {
1141: my ($arrayref) = @_;
1142: my $result='__ARRAY_REF__';
1143: foreach my $elem (@$arrayref) {
1144: if(ref($elem) eq 'ARRAY') {
1145: $result.=&arrayref2str($elem).'&';
1146: } elsif(ref($elem) eq 'HASH') {
1147: $result.=&hashref2str($elem).'&';
1148: } elsif(ref($elem)) {
1149: #print("Got a ref of ".(ref($elem))." skipping.");
1150: } else {
1151: $result.=&escape($elem).'&';
1152: }
1153: }
1154: $result=~s/\&$//;
1155: $result .= '__END_ARRAY_REF__';
1156: return $result;
1157: }
1158:
1159: sub hash2str {
1160: my (%hash) = @_;
1161: my $result=&hashref2str(\%hash);
1162: $result=~s/^__HASH_REF__//;
1163: $result=~s/__END_HASH_REF__$//;
1164: return $result;
1165: }
1166:
1167: sub hashref2str {
1168: my ($hashref)=@_;
1169: my $result='__HASH_REF__';
1170: foreach (keys(%$hashref)) {
1171: if (ref($_) eq 'ARRAY') {
1172: $result.=&arrayref2str($_).'=';
1173: } elsif (ref($_) eq 'HASH') {
1174: $result.=&hashref2str($_).'=';
1175: } elsif (ref($_)) {
1176: $result.='=';
1177: #print("Got a ref of ".(ref($_))." skipping.");
1178: } else {
1179: if ($_) {$result.=&escape($_).'=';} else { last; }
1180: }
1181:
1182: if(ref($hashref->{$_}) eq 'ARRAY') {
1183: $result.=&arrayref2str($hashref->{$_}).'&';
1184: } elsif(ref($hashref->{$_}) eq 'HASH') {
1185: $result.=&hashref2str($hashref->{$_}).'&';
1186: } elsif(ref($hashref->{$_})) {
1187: $result.='&';
1188: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1189: } else {
1190: $result.=&escape($hashref->{$_}).'&';
1191: }
1192: }
1193: $result=~s/\&$//;
1194: $result .= '__END_HASH_REF__';
1195: return $result;
1196: }
1197:
1198: sub str2hash {
1199: my ($string)=@_;
1200: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1201: return %$hash;
1202: }
1203:
1204: sub str2hashref {
1205: my ($string) = @_;
1206:
1207: my %hash;
1208:
1209: if($string !~ /^__HASH_REF__/) {
1210: if (! ($string eq '' || !defined($string))) {
1211: $hash{'error'}='Not hash reference';
1212: }
1213: return (\%hash, $string);
1214: }
1215:
1216: $string =~ s/^__HASH_REF__//;
1217:
1218: while($string !~ /^__END_HASH_REF__/) {
1219: #key
1220: my $key='';
1221: if($string =~ /^__HASH_REF__/) {
1222: ($key, $string)=&str2hashref($string);
1223: if(defined($key->{'error'})) {
1224: $hash{'error'}='Bad data';
1225: return (\%hash, $string);
1226: }
1227: } elsif($string =~ /^__ARRAY_REF__/) {
1228: ($key, $string)=&str2arrayref($string);
1229: if($key->[0] eq 'Array reference error') {
1230: $hash{'error'}='Bad data';
1231: return (\%hash, $string);
1232: }
1233: } else {
1234: $string =~ s/^(.*?)=//;
1235: $key=&unescape($1);
1236: }
1237: $string =~ s/^=//;
1238:
1239: #value
1240: my $value='';
1241: if($string =~ /^__HASH_REF__/) {
1242: ($value, $string)=&str2hashref($string);
1243: if(defined($value->{'error'})) {
1244: $hash{'error'}='Bad data';
1245: return (\%hash, $string);
1246: }
1247: } elsif($string =~ /^__ARRAY_REF__/) {
1248: ($value, $string)=&str2arrayref($string);
1249: if($value->[0] eq 'Array reference error') {
1250: $hash{'error'}='Bad data';
1251: return (\%hash, $string);
1252: }
1253: } else {
1254: $value=&get_scalar(\$string,'__END_HASH_REF__');
1255: }
1256: $string =~ s/^&//;
1257:
1258: $hash{$key}=$value;
1259: }
1260:
1261: $string =~ s/^__END_HASH_REF__//;
1262:
1263: return (\%hash, $string);
1264: }
1265:
1266: sub str2array {
1267: my ($string)=@_;
1268: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1269: return @$array;
1270: }
1271:
1272: sub str2arrayref {
1273: my ($string) = @_;
1274: my @array;
1275:
1276: if($string !~ /^__ARRAY_REF__/) {
1277: if (! ($string eq '' || !defined($string))) {
1278: $array[0]='Array reference error';
1279: }
1280: return (\@array, $string);
1281: }
1282:
1283: $string =~ s/^__ARRAY_REF__//;
1284:
1285: while($string !~ /^__END_ARRAY_REF__/) {
1286: my $value='';
1287: if($string =~ /^__HASH_REF__/) {
1288: ($value, $string)=&str2hashref($string);
1289: if(defined($value->{'error'})) {
1290: $array[0] ='Array reference error';
1291: return (\@array, $string);
1292: }
1293: } elsif($string =~ /^__ARRAY_REF__/) {
1294: ($value, $string)=&str2arrayref($string);
1295: if($value->[0] eq 'Array reference error') {
1296: $array[0] ='Array reference error';
1297: return (\@array, $string);
1298: }
1299: } else {
1300: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1301: }
1302: $string =~ s/^&//;
1303:
1304: push(@array, $value);
1305: }
1306:
1307: $string =~ s/^__END_ARRAY_REF__//;
1308:
1309: return (\@array, $string);
1310: }
1311:
1312: # -------------------------------------------------------------------Temp Store
1313:
1314: sub tmpreset {
1315: my ($symb,$namespace,$domain,$stuname) = @_;
1316: if (!$symb) {
1317: $symb=&symbread();
1318: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1319: }
1320: $symb=escape($symb);
1321:
1322: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1323: $namespace=~s/\//\_/g;
1324: $namespace=~s/\W//g;
1325:
1326: #FIXME needs to do something for /pub resources
1327: if (!$domain) { $domain=$ENV{'user.domain'}; }
1328: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1329: my $path=$perlvar{'lonDaemons'}.'/tmp';
1330: my %hash;
1331: if (tie(%hash,'GDBM_File',
1332: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1333: &GDBM_WRCREAT(),0640)) {
1334: foreach my $key (keys %hash) {
1335: if ($key=~ /:$symb/) {
1336: delete($hash{$key});
1337: }
1338: }
1339: }
1340: }
1341:
1342: sub tmpstore {
1343: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1344:
1345: if (!$symb) {
1346: $symb=&symbread();
1347: if (!$symb) { $symb= $ENV{'request.url'}; }
1348: }
1349: $symb=escape($symb);
1350:
1351: if (!$namespace) {
1352: # I don't think we would ever want to store this for a course.
1353: # it seems this will only be used if we don't have a course.
1354: #$namespace=$ENV{'request.course.id'};
1355: #if (!$namespace) {
1356: $namespace=$ENV{'request.state'};
1357: #}
1358: }
1359: $namespace=~s/\//\_/g;
1360: $namespace=~s/\W//g;
1361: #FIXME needs to do something for /pub resources
1362: if (!$domain) { $domain=$ENV{'user.domain'}; }
1363: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1364: my $now=time;
1365: my %hash;
1366: my $path=$perlvar{'lonDaemons'}.'/tmp';
1367: if (tie(%hash,'GDBM_File',
1368: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1369: &GDBM_WRCREAT(),0640)) {
1370: $hash{"version:$symb"}++;
1371: my $version=$hash{"version:$symb"};
1372: my $allkeys='';
1373: foreach my $key (keys(%$storehash)) {
1374: $allkeys.=$key.':';
1375: $hash{"$version:$symb:$key"}=$$storehash{$key};
1376: }
1377: $hash{"$version:$symb:timestamp"}=$now;
1378: $allkeys.='timestamp';
1379: $hash{"$version:keys:$symb"}=$allkeys;
1380: if (untie(%hash)) {
1381: return 'ok';
1382: } else {
1383: return "error:$!";
1384: }
1385: } else {
1386: return "error:$!";
1387: }
1388: }
1389:
1390: # -----------------------------------------------------------------Temp Restore
1391:
1392: sub tmprestore {
1393: my ($symb,$namespace,$domain,$stuname) = @_;
1394:
1395: if (!$symb) {
1396: $symb=&symbread();
1397: if (!$symb) { $symb= $ENV{'request.url'}; }
1398: }
1399: $symb=escape($symb);
1400:
1401: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1402: #FIXME needs to do something for /pub resources
1403: if (!$domain) { $domain=$ENV{'user.domain'}; }
1404: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1405:
1406: my %returnhash;
1407: $namespace=~s/\//\_/g;
1408: $namespace=~s/\W//g;
1409: my %hash;
1410: my $path=$perlvar{'lonDaemons'}.'/tmp';
1411: if (tie(%hash,'GDBM_File',
1412: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1413: &GDBM_READER(),0640)) {
1414: my $version=$hash{"version:$symb"};
1415: $returnhash{'version'}=$version;
1416: my $scope;
1417: for ($scope=1;$scope<=$version;$scope++) {
1418: my $vkeys=$hash{"$scope:keys:$symb"};
1419: my @keys=split(/:/,$vkeys);
1420: my $key;
1421: $returnhash{"$scope:keys"}=$vkeys;
1422: foreach $key (@keys) {
1423: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1424: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1425: }
1426: }
1427: if (!(untie(%hash))) {
1428: return "error:$!";
1429: }
1430: } else {
1431: return "error:$!";
1432: }
1433: return %returnhash;
1434: }
1435:
1436: # ----------------------------------------------------------------------- Store
1437:
1438: sub store {
1439: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1440: my $home='';
1441:
1442: if ($stuname) { $home=&homeserver($stuname,$domain); }
1443:
1444: $symb=&symbclean($symb);
1445: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1446:
1447: &devalidate($symb);
1448:
1449: $symb=escape($symb);
1450: if (!$namespace) {
1451: unless ($namespace=$ENV{'request.course.id'}) {
1452: return '';
1453: }
1454: }
1455: if (!$domain) { $domain=$ENV{'user.domain'}; }
1456: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1457: if (!$home) { $home=$ENV{'user.home'}; }
1458: my $namevalue='';
1459: foreach (keys %$storehash) {
1460: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1461: }
1462: $namevalue=~s/\&$//;
1463: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1464: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1465: }
1466:
1467: # -------------------------------------------------------------- Critical Store
1468:
1469: sub cstore {
1470: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1471: my $home='';
1472:
1473: if ($stuname) { $home=&homeserver($stuname,$domain); }
1474:
1475: $symb=&symbclean($symb);
1476: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1477:
1478: &devalidate($symb);
1479:
1480: $symb=escape($symb);
1481: if (!$namespace) {
1482: unless ($namespace=$ENV{'request.course.id'}) {
1483: return '';
1484: }
1485: }
1486: if (!$domain) { $domain=$ENV{'user.domain'}; }
1487: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1488: if (!$home) { $home=$ENV{'user.home'}; }
1489:
1490: my $namevalue='';
1491: foreach (keys %$storehash) {
1492: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1493: }
1494: $namevalue=~s/\&$//;
1495: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1496: return critical
1497: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1498: }
1499:
1500: # --------------------------------------------------------------------- Restore
1501:
1502: sub restore {
1503: my ($symb,$namespace,$domain,$stuname) = @_;
1504: my $home='';
1505:
1506: if ($stuname) { $home=&homeserver($stuname,$domain); }
1507:
1508: if (!$symb) {
1509: unless ($symb=escape(&symbread())) { return ''; }
1510: } else {
1511: $symb=&escape(&symbclean($symb));
1512: }
1513: if (!$namespace) {
1514: unless ($namespace=$ENV{'request.course.id'}) {
1515: return '';
1516: }
1517: }
1518: if (!$domain) { $domain=$ENV{'user.domain'}; }
1519: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1520: if (!$home) { $home=$ENV{'user.home'}; }
1521: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1522:
1523: my %returnhash=();
1524: foreach (split(/\&/,$answer)) {
1525: my ($name,$value)=split(/\=/,$_);
1526: $returnhash{&unescape($name)}=&unescape($value);
1527: }
1528: my $version;
1529: for ($version=1;$version<=$returnhash{'version'};$version++) {
1530: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1531: $returnhash{$_}=$returnhash{$version.':'.$_};
1532: }
1533: }
1534: return %returnhash;
1535: }
1536:
1537: # ---------------------------------------------------------- Course Description
1538:
1539: sub coursedescription {
1540: my $courseid=shift;
1541: $courseid=~s/^\///;
1542: $courseid=~s/\_/\//g;
1543: my ($cdomain,$cnum)=split(/\//,$courseid);
1544: my $chome=&homeserver($cnum,$cdomain);
1545: if ($chome ne 'no_host') {
1546: my %returnhash=&dump('environment',$cdomain,$cnum);
1547: if (!exists($returnhash{'con_lost'})) {
1548: my $normalid=$cdomain.'_'.$cnum;
1549: my %envhash=();
1550: $returnhash{'home'}= $chome;
1551: $returnhash{'domain'} = $cdomain;
1552: $returnhash{'num'} = $cnum;
1553: while (my ($name,$value) = each %returnhash) {
1554: $envhash{'course.'.$normalid.'.'.$name}=$value;
1555: }
1556: $returnhash{'url'}=&clutter($returnhash{'url'});
1557: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1558: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1559: $envhash{'course.'.$normalid.'.last_cache'}=time;
1560: $envhash{'course.'.$normalid.'.home'}=$chome;
1561: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1562: $envhash{'course.'.$normalid.'.num'}=$cnum;
1563: &appenv(%envhash);
1564: return %returnhash;
1565: }
1566: }
1567: return ();
1568: }
1569:
1570: # -------------------------------------------------------- Get user privileges
1571:
1572: sub rolesinit {
1573: my ($domain,$username,$authhost)=@_;
1574: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1575: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1576: my %allroles=();
1577: my %thesepriv=();
1578: my $now=time;
1579: my $userroles="user.login.time=$now\n";
1580: my $thesestr;
1581:
1582: if ($rolesdump ne '') {
1583: foreach (split(/&/,$rolesdump)) {
1584: if ($_!~/^rolesdef\&/) {
1585: my ($area,$role)=split(/=/,$_);
1586: $area=~s/\_\w\w$//;
1587: my ($trole,$tend,$tstart)=split(/_/,$role);
1588: $userroles.='user.role.'.$trole.'.'.$area.'='.
1589: $tstart.'.'.$tend."\n";
1590: if ($tend!=0) {
1591: if ($tend<$now) {
1592: $trole='';
1593: }
1594: }
1595: if ($tstart!=0) {
1596: if ($tstart>$now) {
1597: $trole='';
1598: }
1599: }
1600: if (($area ne '') && ($trole ne '')) {
1601: my $spec=$trole.'.'.$area;
1602: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1603: if ($trole =~ /^cr\//) {
1604: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1605: my $homsvr=homeserver($rauthor,$rdomain);
1606: if ($hostname{$homsvr} ne '') {
1607: my $roledef=
1608: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1609: $homsvr);
1610: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1611: my ($syspriv,$dompriv,$coursepriv)=
1612: split(/\_/,unescape($roledef));
1613: $allroles{'cm./'}.=':'.$syspriv;
1614: $allroles{$spec.'./'}.=':'.$syspriv;
1615: if ($tdomain ne '') {
1616: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1617: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1618: if ($trest ne '') {
1619: $allroles{'cm.'.$area}.=':'.$coursepriv;
1620: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1621: }
1622: }
1623: }
1624: }
1625: } else {
1626: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1627: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1628: if ($tdomain ne '') {
1629: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1630: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1631: if ($trest ne '') {
1632: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1633: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1634: }
1635: }
1636: }
1637: }
1638: }
1639: }
1640: my $adv=0;
1641: my $author=0;
1642: foreach (keys %allroles) {
1643: %thesepriv=();
1644: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1645: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1646: foreach (split(/:/,$allroles{$_})) {
1647: if ($_ ne '') {
1648: my ($privilege,$restrictions)=split(/&/,$_);
1649: if ($restrictions eq '') {
1650: $thesepriv{$privilege}='F';
1651: } else {
1652: if ($thesepriv{$privilege} ne 'F') {
1653: $thesepriv{$privilege}.=$restrictions;
1654: }
1655: }
1656: }
1657: }
1658: $thesestr='';
1659: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1660: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1661: }
1662: $userroles.='user.adv='.$adv."\n".
1663: 'user.author='.$author."\n";
1664: $ENV{'user.adv'}=$adv;
1665: }
1666: return $userroles;
1667: }
1668:
1669: # --------------------------------------------------------------- get interface
1670:
1671: sub get {
1672: my ($namespace,$storearr,$udomain,$uname)=@_;
1673: my $items='';
1674: foreach (@$storearr) {
1675: $items.=escape($_).'&';
1676: }
1677: $items=~s/\&$//;
1678: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1679: if (!$uname) { $uname=$ENV{'user.name'}; }
1680: my $uhome=&homeserver($uname,$udomain);
1681:
1682: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1683: my @pairs=split(/\&/,$rep);
1684: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1685: return @pairs;
1686: }
1687: my %returnhash=();
1688: my $i=0;
1689: foreach (@$storearr) {
1690: $returnhash{$_}=unescape($pairs[$i]);
1691: $i++;
1692: }
1693: return %returnhash;
1694: }
1695:
1696: # --------------------------------------------------------------- del interface
1697:
1698: sub del {
1699: my ($namespace,$storearr,$udomain,$uname)=@_;
1700: my $items='';
1701: foreach (@$storearr) {
1702: $items.=escape($_).'&';
1703: }
1704: $items=~s/\&$//;
1705: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1706: if (!$uname) { $uname=$ENV{'user.name'}; }
1707: my $uhome=&homeserver($uname,$udomain);
1708:
1709: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1710: }
1711:
1712: # -------------------------------------------------------------- dump interface
1713:
1714: sub dump {
1715: my ($namespace,$udomain,$uname,$regexp)=@_;
1716: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1717: if (!$uname) { $uname=$ENV{'user.name'}; }
1718: my $uhome=&homeserver($uname,$udomain);
1719: if ($regexp) {
1720: $regexp=&escape($regexp);
1721: } else {
1722: $regexp='.';
1723: }
1724: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1725: my @pairs=split(/\&/,$rep);
1726: my %returnhash=();
1727: foreach (@pairs) {
1728: my ($key,$value)=split(/=/,$_);
1729: $returnhash{unescape($key)}=unescape($value);
1730: }
1731: return %returnhash;
1732: }
1733:
1734: # --------------------------------------------------------------- put interface
1735:
1736: sub put {
1737: my ($namespace,$storehash,$udomain,$uname)=@_;
1738: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1739: if (!$uname) { $uname=$ENV{'user.name'}; }
1740: my $uhome=&homeserver($uname,$udomain);
1741: my $items='';
1742: foreach (keys %$storehash) {
1743: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1744: }
1745: $items=~s/\&$//;
1746: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1747: }
1748:
1749: # ------------------------------------------------------ critical put interface
1750:
1751: sub cput {
1752: my ($namespace,$storehash,$udomain,$uname)=@_;
1753: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1754: if (!$uname) { $uname=$ENV{'user.name'}; }
1755: my $uhome=&homeserver($uname,$udomain);
1756: my $items='';
1757: foreach (keys %$storehash) {
1758: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1759: }
1760: $items=~s/\&$//;
1761: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1762: }
1763:
1764: # -------------------------------------------------------------- eget interface
1765:
1766: sub eget {
1767: my ($namespace,$storearr,$udomain,$uname)=@_;
1768: my $items='';
1769: foreach (@$storearr) {
1770: $items.=escape($_).'&';
1771: }
1772: $items=~s/\&$//;
1773: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1774: if (!$uname) { $uname=$ENV{'user.name'}; }
1775: my $uhome=&homeserver($uname,$udomain);
1776: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1777: my @pairs=split(/\&/,$rep);
1778: my %returnhash=();
1779: my $i=0;
1780: foreach (@$storearr) {
1781: $returnhash{$_}=unescape($pairs[$i]);
1782: $i++;
1783: }
1784: return %returnhash;
1785: }
1786:
1787: # ------------------------------------------------- Check for a user privilege
1788:
1789: sub allowed {
1790: my ($priv,$uri)=@_;
1791:
1792: my $orguri=$uri;
1793: $uri=&declutter($uri);
1794:
1795: # Free bre access to adm and meta resources
1796:
1797: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1798: return 'F';
1799: }
1800:
1801: # Free bre to public access
1802:
1803: if ($priv eq 'bre') {
1804: my $copyright=&metadata($uri,'copyright');
1805: if ($copyright eq 'public') { return 'F'; }
1806: if ($copyright eq 'priv') {
1807: $uri=~/([^\/]+)\/([^\/]+)\//;
1808: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
1809: return '';
1810: }
1811: }
1812: if ($copyright eq 'domain') {
1813: $uri=~/([^\/]+)\/([^\/]+)\//;
1814: unless (($ENV{'user.domain'} eq $1) ||
1815: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
1816: return '';
1817: }
1818: }
1819: if ($ENV{'request.role'}=~ /li\.\//) {
1820: # Library role, so allow browsing of resources in this domain.
1821: return 'F';
1822: }
1823: }
1824: # Domain coordinator is trying to create a course
1825: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
1826: # uri is the requested domain in this case.
1827: # comparison to 'request.role.domain' shows if the user has selected
1828: # a role of dc for the domain in question.
1829: return 'F' if ($uri eq $ENV{'request.role.domain'});
1830: }
1831:
1832: my $thisallowed='';
1833: my $statecond=0;
1834: my $courseprivid='';
1835:
1836: # Course
1837:
1838: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1839: $thisallowed.=$1;
1840: }
1841:
1842: # Domain
1843:
1844: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1845: =~/$priv\&([^\:]*)/) {
1846: $thisallowed.=$1;
1847: }
1848:
1849: # Course: uri itself is a course
1850: my $courseuri=$uri;
1851: $courseuri=~s/\_(\d)/\/$1/;
1852: $courseuri=~s/^([^\/])/\/$1/;
1853:
1854: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1855: =~/$priv\&([^\:]*)/) {
1856: $thisallowed.=$1;
1857: }
1858:
1859: # Full access at system, domain or course-wide level? Exit.
1860:
1861: if ($thisallowed=~/F/) {
1862: return 'F';
1863: }
1864:
1865: # If this is generating or modifying users, exit with special codes
1866:
1867: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1868: return $thisallowed;
1869: }
1870: #
1871: # Gathered so far: system, domain and course wide privileges
1872: #
1873: # Course: See if uri or referer is an individual resource that is part of
1874: # the course
1875:
1876: if ($ENV{'request.course.id'}) {
1877:
1878: $courseprivid=$ENV{'request.course.id'};
1879: if ($ENV{'request.course.sec'}) {
1880: $courseprivid.='/'.$ENV{'request.course.sec'};
1881: }
1882: $courseprivid=~s/\_/\//;
1883: my $checkreferer=1;
1884: my ($match,$cond)=&is_on_map($uri);
1885: if ($match) {
1886: $statecond=$cond;
1887: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1888: =~/$priv\&([^\:]*)/) {
1889: $thisallowed.=$1;
1890: $checkreferer=0;
1891: }
1892: }
1893:
1894: if ($checkreferer) {
1895: my $refuri=$ENV{'httpref.'.$orguri};
1896: unless ($refuri) {
1897: foreach (keys %ENV) {
1898: if ($_=~/^httpref\..*\*/) {
1899: my $pattern=$_;
1900: $pattern=~s/^httpref\.\/res\///;
1901: $pattern=~s/\*/\[\^\/\]\+/g;
1902: $pattern=~s/\//\\\//g;
1903: if ($orguri=~/$pattern/) {
1904: $refuri=$ENV{$_};
1905: }
1906: }
1907: }
1908: }
1909:
1910: if ($refuri) {
1911: $refuri=&declutter($refuri);
1912: my ($match,$cond)=&is_on_map($refuri);
1913: if ($match) {
1914: my $refstatecond=$cond;
1915: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1916: =~/$priv\&([^\:]*)/) {
1917: $thisallowed.=$1;
1918: $uri=$refuri;
1919: $statecond=$refstatecond;
1920: }
1921: }
1922: }
1923: }
1924: }
1925:
1926: #
1927: # Gathered now: all privileges that could apply, and condition number
1928: #
1929: #
1930: # Full or no access?
1931: #
1932:
1933: if ($thisallowed=~/F/) {
1934: return 'F';
1935: }
1936:
1937: unless ($thisallowed) {
1938: return '';
1939: }
1940:
1941: # Restrictions exist, deal with them
1942: #
1943: # C:according to course preferences
1944: # R:according to resource settings
1945: # L:unless locked
1946: # X:according to user session state
1947: #
1948:
1949: # Possibly locked functionality, check all courses
1950: # Locks might take effect only after 10 minutes cache expiration for other
1951: # courses, and 2 minutes for current course
1952:
1953: my $envkey;
1954: if ($thisallowed=~/L/) {
1955: foreach $envkey (keys %ENV) {
1956: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1957: my $courseid=$2;
1958: my $roleid=$1.'.'.$2;
1959: $courseid=~s/^\///;
1960: my $expiretime=600;
1961: if ($ENV{'request.role'} eq $roleid) {
1962: $expiretime=120;
1963: }
1964: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1965: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1966: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1967: &coursedescription($courseid);
1968: }
1969: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1970: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1971: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1972: &log($ENV{'user.domain'},$ENV{'user.name'},
1973: $ENV{'user.home'},
1974: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1975: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1976: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1977: return '';
1978: }
1979: }
1980: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1981: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1982: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1983: &log($ENV{'user.domain'},$ENV{'user.name'},
1984: $ENV{'user.home'},
1985: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1986: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1987: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1988: return '';
1989: }
1990: }
1991: }
1992: }
1993: }
1994:
1995: #
1996: # Rest of the restrictions depend on selected course
1997: #
1998:
1999: unless ($ENV{'request.course.id'}) {
2000: return '1';
2001: }
2002:
2003: #
2004: # Now user is definitely in a course
2005: #
2006:
2007:
2008: # Course preferences
2009:
2010: if ($thisallowed=~/C/) {
2011: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2012: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2013: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2014: =~/$rolecode/) {
2015: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2016: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2017: $ENV{'request.course.id'});
2018: return '';
2019: }
2020:
2021: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2022: =~/$unamedom/) {
2023: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2024: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2025: $ENV{'request.course.id'});
2026: return '';
2027: }
2028: }
2029:
2030: # Resource preferences
2031:
2032: if ($thisallowed=~/R/) {
2033: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2034: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
2035: if (-e $filename) {
2036: my @content;
2037: {
2038: my $fh=Apache::File->new($filename);
2039: @content=<$fh>;
2040: }
2041: if (join('',@content)=~
2042: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
2043: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2044: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2045: return '';
2046:
2047: }
2048: }
2049: }
2050:
2051: # Restricted by state or randomout?
2052:
2053: if ($thisallowed=~/X/) {
2054: if ($ENV{'acc.randomout'}) {
2055: my $symb=&symbread($uri,1);
2056: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2057: return '';
2058: }
2059: }
2060: if (&condval($statecond)) {
2061: return '2';
2062: } else {
2063: return '';
2064: }
2065: }
2066:
2067: return 'F';
2068: }
2069:
2070: # --------------------------------------------------- Is a resource on the map?
2071:
2072: sub is_on_map {
2073: my $uri=&declutter(shift);
2074: my @uriparts=split(/\//,$uri);
2075: my $filename=$uriparts[$#uriparts];
2076: my $pathname=$uri;
2077: $pathname=~s|/\Q$filename\E$||;
2078: #Trying to find the conditional for the file
2079: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2080: /\&\Q$filename\E\:([\d\|]+)\&/);
2081: if ($match) {
2082: return (1,$1);
2083: } else {
2084: return (0,0);
2085: }
2086: }
2087:
2088: # ----------------------------------------------------------------- Define Role
2089:
2090: sub definerole {
2091: if (allowed('mcr','/')) {
2092: my ($rolename,$sysrole,$domrole,$courole)=@_;
2093: foreach (split('/',$sysrole)) {
2094: my ($crole,$cqual)=split(/\&/,$_);
2095: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2096: if ($pr{'cr:s'}=~/$crole\&/) {
2097: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2098: return "refused:s:$crole&$cqual";
2099: }
2100: }
2101: }
2102: foreach (split('/',$domrole)) {
2103: my ($crole,$cqual)=split(/\&/,$_);
2104: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2105: if ($pr{'cr:d'}=~/$crole\&/) {
2106: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2107: return "refused:d:$crole&$cqual";
2108: }
2109: }
2110: }
2111: foreach (split('/',$courole)) {
2112: my ($crole,$cqual)=split(/\&/,$_);
2113: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2114: if ($pr{'cr:c'}=~/$crole\&/) {
2115: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2116: return "refused:c:$crole&$cqual";
2117: }
2118: }
2119: }
2120: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2121: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2122: "rolesdef_$rolename=".
2123: escape($sysrole.'_'.$domrole.'_'.$courole);
2124: return reply($command,$ENV{'user.home'});
2125: } else {
2126: return 'refused';
2127: }
2128: }
2129:
2130: # ---------------- Make a metadata query against the network of library servers
2131:
2132: sub metadata_query {
2133: my ($query,$custom,$customshow,$server_array)=@_;
2134: my %rhash;
2135: my @server_list = (defined($server_array) ? @$server_array
2136: : keys(%libserv) );
2137: for my $server (@server_list) {
2138: unless ($custom or $customshow) {
2139: my $reply=&reply("querysend:".&escape($query),$server);
2140: $rhash{$server}=$reply;
2141: }
2142: else {
2143: my $reply=&reply("querysend:".&escape($query).':'.
2144: &escape($custom).':'.&escape($customshow),
2145: $server);
2146: $rhash{$server}=$reply;
2147: }
2148: }
2149: return \%rhash;
2150: }
2151:
2152: # ----------------------------------------- Send log queries and wait for reply
2153:
2154: sub log_query {
2155: my ($uname,$udom,$query,%filters)=@_;
2156: my $uhome=&homeserver($uname,$udom);
2157: if ($uhome eq 'no_host') { return 'error: no_host'; }
2158: my $uhost=$hostname{$uhome};
2159: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2160: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2161: $uhome);
2162: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2163: return get_query_reply($queryid);
2164: }
2165:
2166: sub get_query_reply {
2167: my $queryid=shift;
2168: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2169: my $reply='';
2170: for (1..100) {
2171: sleep 2;
2172: if (-e $replyfile.'.end') {
2173: if (my $fh=Apache::File->new($replyfile)) {
2174: $reply.=<$fh>;
2175: $fh->close;
2176: } else { return 'error: reply_file_error'; }
2177: return &unescape($reply);
2178: }
2179: }
2180: return 'timeout:'.$queryid;
2181: }
2182:
2183: sub courselog_query {
2184: #
2185: # possible filters:
2186: # url: url or symb
2187: # username
2188: # domain
2189: # action: view, submit, grade
2190: # start: timestamp
2191: # end: timestamp
2192: #
2193: my (%filters)=@_;
2194: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2195: if ($filters{'url'}) {
2196: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2197: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2198: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2199: }
2200: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2201: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2202: return &log_query($cname,$cdom,'courselog',%filters);
2203: }
2204:
2205: sub userlog_query {
2206: my ($uname,$udom,%filters)=@_;
2207: return &log_query($uname,$udom,'userlog',%filters);
2208: }
2209:
2210: # ------------------------------------------------------------------ Plain Text
2211:
2212: sub plaintext {
2213: my $short=shift;
2214: return $prp{$short};
2215: }
2216:
2217: # ----------------------------------------------------------------- Assign Role
2218:
2219: sub assignrole {
2220: my ($udom,$uname,$url,$role,$end,$start)=@_;
2221: my $mrole;
2222: if ($role =~ /^cr\//) {
2223: unless (&allowed('ccr',$url)) {
2224: &logthis('Refused custom assignrole: '.
2225: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2226: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2227: return 'refused';
2228: }
2229: $mrole='cr';
2230: } else {
2231: my $cwosec=$url;
2232: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2233: unless (&allowed('c'.$role,$cwosec)) {
2234: &logthis('Refused assignrole: '.
2235: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2236: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2237: return 'refused';
2238: }
2239: $mrole=$role;
2240: }
2241: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2242: "$udom:$uname:$url".'_'."$mrole=$role";
2243: if ($end) { $command.='_'.$end; }
2244: if ($start) {
2245: if ($end) {
2246: $command.='_'.$start;
2247: } else {
2248: $command.='_0_'.$start;
2249: }
2250: }
2251: return &reply($command,&homeserver($uname,$udom));
2252: }
2253:
2254: # -------------------------------------------------- Modify user authentication
2255: # Overrides without validation
2256:
2257: sub modifyuserauth {
2258: my ($udom,$uname,$umode,$upass)=@_;
2259: my $uhome=&homeserver($uname,$udom);
2260: unless (&allowed('mau',$udom)) { return 'refused'; }
2261: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2262: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2263: ' in domain '.$ENV{'request.role.domain'});
2264: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2265: &escape($upass),$uhome);
2266: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2267: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2268: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2269: &log($udom,,$uname,$uhome,
2270: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2271: $ENV{'user.name'}.', '.$umode.
2272: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2273: unless ($reply eq 'ok') {
2274: &logthis('Authentication mode error: '.$reply);
2275: return 'error: '.$reply;
2276: }
2277: return 'ok';
2278: }
2279:
2280: # --------------------------------------------------------------- Modify a user
2281:
2282: sub modifyuser {
2283: my ($udom, $uname, $uid,
2284: $umode, $upass, $first,
2285: $middle, $last, $gene,
2286: $forceid, $desiredhome)=@_;
2287: $udom=~s/\W//g;
2288: $uname=~s/\W//g;
2289: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2290: $umode.', '.$first.', '.$middle.', '.
2291: $last.', '.$gene.'(forceid: '.$forceid.')'.
2292: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2293: ' desiredhome not specified').
2294: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2295: ' in domain '.$ENV{'request.role.domain'});
2296: my $uhome=&homeserver($uname,$udom,'true');
2297: # ----------------------------------------------------------------- Create User
2298: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2299: my $unhome='';
2300: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2301: $unhome = $desiredhome;
2302: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2303: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2304: } else { # load balancing routine for determining $unhome
2305: my $tryserver;
2306: my $loadm=10000000;
2307: foreach $tryserver (keys %libserv) {
2308: if ($hostdom{$tryserver} eq $udom) {
2309: my $answer=reply('load',$tryserver);
2310: if (($answer=~/\d+/) && ($answer<$loadm)) {
2311: $loadm=$answer;
2312: $unhome=$tryserver;
2313: }
2314: }
2315: }
2316: }
2317: if (($unhome eq '') || ($unhome eq 'no_host')) {
2318: return 'error: unable to find a home server for '.$uname.
2319: ' in domain '.$udom;
2320: }
2321: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2322: &escape($upass),$unhome);
2323: unless ($reply eq 'ok') {
2324: return 'error: '.$reply;
2325: }
2326: $uhome=&homeserver($uname,$udom,'true');
2327: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2328: return 'error: verify home';
2329: }
2330: } # End of creation of new user
2331: # ---------------------------------------------------------------------- Add ID
2332: if ($uid) {
2333: $uid=~tr/A-Z/a-z/;
2334: my %uidhash=&idrget($udom,$uname);
2335: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2336: && (!$forceid)) {
2337: unless ($uid eq $uidhash{$uname}) {
2338: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2339: }
2340: } else {
2341: &idput($udom,($uname => $uid));
2342: }
2343: }
2344: # -------------------------------------------------------------- Add names, etc
2345: my %names=&get('environment',
2346: ['firstname','middlename','lastname','generation'],
2347: $udom,$uname);
2348: if ($names{'firstname'} =~ m/^error:.*/) { %names=(); }
2349: if ($first) { $names{'firstname'} = $first; }
2350: if ($middle) { $names{'middlename'} = $middle; }
2351: if ($last) { $names{'lastname'} = $last; }
2352: if ($gene) { $names{'generation'} = $gene; }
2353: my $reply = &put('environment', \%names, $udom,$uname);
2354: if ($reply ne 'ok') { return 'error: '.$reply; }
2355: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2356: $umode.', '.$first.', '.$middle.', '.
2357: $last.', '.$gene.' by '.
2358: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2359: return 'ok';
2360: }
2361:
2362: # -------------------------------------------------------------- Modify student
2363:
2364: sub modifystudent {
2365: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2366: $end,$start,$forceid,$desiredhome)=@_;
2367: my $cid='';
2368: unless ($cid=$ENV{'request.course.id'}) {
2369: return 'not_in_class';
2370: }
2371: # --------------------------------------------------------------- Make the user
2372: my $reply=&modifyuser
2373: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2374: $desiredhome);
2375: unless ($reply eq 'ok') { return $reply; }
2376: # This will cause &modify_student_enrollment to get the uid from the
2377: # students environment
2378: $uid = undef if (!$forceid);
2379: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2380: $last,$gene,$usec,$end,$start);
2381: return $reply;
2382: }
2383:
2384: sub modify_student_enrollment {
2385: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2386: # Get the course id from the environment
2387: my $cid='';
2388: unless ($cid=$ENV{'request.course.id'}) {
2389: return 'not_in_class';
2390: }
2391: # Make sure the user exists
2392: my $uhome=&homeserver($uname,$udom);
2393: if (($uhome eq '') || ($uhome eq 'no_host')) {
2394: return 'error: no such user';
2395: }
2396: #
2397: # Get student data if we were not given enough information
2398: if (!defined($first) || $first eq '' ||
2399: !defined($last) || $last eq '' ||
2400: !defined($uid) || $uid eq '' ||
2401: !defined($middle) || $middle eq '' ||
2402: !defined($gene) || $gene eq '') {
2403: # They did not supply us with enough data to enroll the student, so
2404: # we need to pick up more information.
2405: my %tmp = &get('environment',
2406: ['firstname','middlename','lastname', 'generation','id']
2407: ,$udom,$uname);
2408:
2409: foreach (keys(%tmp)) {
2410: &logthis("key $_ = ".$tmp{$_});
2411: }
2412: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2413: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2414: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
2415: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
2416: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2417: }
2418: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2419: $first,$middle);
2420: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2421: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2422: &escape($uname.':'.$udom).'='.
2423: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
2424: $ENV{'course.'.$cid.'.home'});
2425: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2426: return 'error: '.$reply;
2427: }
2428: # Add student role to user
2429: my $uurl='/'.$cid;
2430: $uurl=~s/\_/\//g;
2431: if ($usec) {
2432: $uurl.='/'.$usec;
2433: }
2434: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2435: }
2436:
2437: # ------------------------------------------------- Write to course preferences
2438:
2439: sub writecoursepref {
2440: my ($courseid,%prefs)=@_;
2441: $courseid=~s/^\///;
2442: $courseid=~s/\_/\//g;
2443: my ($cdomain,$cnum)=split(/\//,$courseid);
2444: my $chome=homeserver($cnum,$cdomain);
2445: if (($chome eq '') || ($chome eq 'no_host')) {
2446: return 'error: no such course';
2447: }
2448: my $cstring='';
2449: foreach (keys %prefs) {
2450: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2451: }
2452: $cstring=~s/\&$//;
2453: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2454: }
2455:
2456: # ---------------------------------------------------------- Make/modify course
2457:
2458: sub createcourse {
2459: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2460: $url=&declutter($url);
2461: my $cid='';
2462: unless (&allowed('ccc',$udom)) {
2463: return 'refused';
2464: }
2465: # ------------------------------------------------------------------- Create ID
2466: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2467: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2468: # ----------------------------------------------- Make sure that does not exist
2469: my $uhome=&homeserver($uname,$udom,'true');
2470: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2471: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2472: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2473: $uhome=&homeserver($uname,$udom,'true');
2474: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2475: return 'error: unable to generate unique course-ID';
2476: }
2477: }
2478: # ------------------------------------------------ Check supplied server name
2479: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2480: if (! exists($libserv{$course_server})) {
2481: return 'error:bad server name '.$course_server;
2482: }
2483: # ------------------------------------------------------------- Make the course
2484: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2485: $course_server);
2486: unless ($reply eq 'ok') { return 'error: '.$reply; }
2487: $uhome=&homeserver($uname,$udom,'true');
2488: if (($uhome eq '') || ($uhome eq 'no_host')) {
2489: return 'error: no such course';
2490: }
2491: # ----------------------------------------------------------------- Course made
2492: my $topurl=$url;
2493: unless ($nonstandard) {
2494: # ------------------------------------------ For standard courses, make top url
2495: my $mapurl=&clutter($url);
2496: if ($mapurl eq '/res/') { $mapurl=''; }
2497: $ENV{'form.initmap'}=(<<ENDINITMAP);
2498: <map>
2499: <resource id="1" type="start"></resource>
2500: <resource id="2" src="$mapurl"></resource>
2501: <resource id="3" type="finish"></resource>
2502: <link index="1" from="1" to="2"></link>
2503: <link index="2" from="2" to="3"></link>
2504: </map>
2505: ENDINITMAP
2506: $topurl=&declutter(
2507: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2508: );
2509: }
2510: # ----------------------------------------------------------- Write preferences
2511: &writecoursepref($udom.'_'.$uname,
2512: ('description' => $description,
2513: 'url' => $topurl));
2514: return '/'.$udom.'/'.$uname;
2515: }
2516:
2517: # ---------------------------------------------------------- Assign Custom Role
2518:
2519: sub assigncustomrole {
2520: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2521: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2522: $end,$start);
2523: }
2524:
2525: # ----------------------------------------------------------------- Revoke Role
2526:
2527: sub revokerole {
2528: my ($udom,$uname,$url,$role)=@_;
2529: my $now=time;
2530: return &assignrole($udom,$uname,$url,$role,$now);
2531: }
2532:
2533: # ---------------------------------------------------------- Revoke Custom Role
2534:
2535: sub revokecustomrole {
2536: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2537: my $now=time;
2538: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2539: }
2540:
2541: # ------------------------------------------------------------ Directory lister
2542:
2543: sub dirlist {
2544: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2545:
2546: $uri=~s/^\///;
2547: $uri=~s/\/$//;
2548: my ($udom, $uname);
2549: (undef,$udom,$uname)=split(/\//,$uri);
2550: if(defined($userdomain)) {
2551: $udom = $userdomain;
2552: }
2553: if(defined($username)) {
2554: $uname = $username;
2555: }
2556:
2557: my $dirRoot = $perlvar{'lonDocRoot'};
2558: if(defined($alternateDirectoryRoot)) {
2559: $dirRoot = $alternateDirectoryRoot;
2560: $dirRoot =~ s/\/$//;
2561: }
2562:
2563: if($udom) {
2564: if($uname) {
2565: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2566: homeserver($uname,$udom));
2567: return split(/:/,$listing);
2568: } elsif(!defined($alternateDirectoryRoot)) {
2569: my $tryserver;
2570: my %allusers=();
2571: foreach $tryserver (keys %libserv) {
2572: if($hostdom{$tryserver} eq $udom) {
2573: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2574: $udom, $tryserver);
2575: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2576: && ($listing ne 'con_lost')) {
2577: foreach (split(/:/,$listing)) {
2578: my ($entry,@stat)=split(/&/,$_);
2579: $allusers{$entry}=1;
2580: }
2581: }
2582: }
2583: }
2584: my $alluserstr='';
2585: foreach (sort keys %allusers) {
2586: $alluserstr.=$_.'&user:';
2587: }
2588: $alluserstr=~s/:$//;
2589: return split(/:/,$alluserstr);
2590: } else {
2591: my @emptyResults = ();
2592: push(@emptyResults, 'missing user name');
2593: return split(':',@emptyResults);
2594: }
2595: } elsif(!defined($alternateDirectoryRoot)) {
2596: my $tryserver;
2597: my %alldom=();
2598: foreach $tryserver (keys %libserv) {
2599: $alldom{$hostdom{$tryserver}}=1;
2600: }
2601: my $alldomstr='';
2602: foreach (sort keys %alldom) {
2603: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2604: }
2605: $alldomstr=~s/:$//;
2606: return split(/:/,$alldomstr);
2607: } else {
2608: my @emptyResults = ();
2609: push(@emptyResults, 'missing domain');
2610: return split(':',@emptyResults);
2611: }
2612: }
2613:
2614: # --------------------------------------------- GetFileTimestamp
2615: # This function utilizes dirlist and returns the date stamp for
2616: # when it was last modified. It will also return an error of -1
2617: # if an error occurs
2618:
2619: sub GetFileTimestamp {
2620: my ($studentDomain,$studentName,$filename,$root)=@_;
2621: $studentDomain=~s/\W//g;
2622: $studentName=~s/\W//g;
2623: my $subdir=$studentName.'__';
2624: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
2625: my $proname="$studentDomain/$subdir/$studentName";
2626: $proname .= '/'.$filename;
2627: my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
2628: $root);
2629: my $fileStat = $dir[0];
2630: my @stats = split('&', $fileStat);
2631: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
2632: return $stats[9];
2633: } else {
2634: return -1;
2635: }
2636: }
2637:
2638: # -------------------------------------------------------- Value of a Condition
2639:
2640: sub directcondval {
2641: my $number=shift;
2642: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2643: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2644: } else {
2645: return 2;
2646: }
2647: }
2648:
2649: sub condval {
2650: my $condidx=shift;
2651: my $result=0;
2652: my $allpathcond='';
2653: foreach (split(/\|/,$condidx)) {
2654: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2655: $allpathcond.=
2656: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2657: }
2658: }
2659: $allpathcond=~s/\|$//;
2660: if ($ENV{'request.course.id'}) {
2661: if ($allpathcond) {
2662: my $operand='|';
2663: my @stack;
2664: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2665: if ($_ eq '(') {
2666: push @stack,($operand,$result)
2667: } elsif ($_ eq ')') {
2668: my $before=pop @stack;
2669: if (pop @stack eq '&') {
2670: $result=$result>$before?$before:$result;
2671: } else {
2672: $result=$result>$before?$result:$before;
2673: }
2674: } elsif (($_ eq '&') || ($_ eq '|')) {
2675: $operand=$_;
2676: } else {
2677: my $new=directcondval($_);
2678: if ($operand eq '&') {
2679: $result=$result>$new?$new:$result;
2680: } else {
2681: $result=$result>$new?$result:$new;
2682: }
2683: }
2684: }
2685: }
2686: }
2687: return $result;
2688: }
2689:
2690: # ---------------------------------------------------- Devalidate courseresdata
2691:
2692: sub devalidatecourseresdata {
2693: my ($coursenum,$coursedomain)=@_;
2694: my $hashid=$coursenum.':'.$coursedomain;
2695: delete $courseresdatacache{$hashid.'.time'};
2696: }
2697:
2698: # --------------------------------------------------- Course Resourcedata Query
2699:
2700: sub courseresdata {
2701: my ($coursenum,$coursedomain,@which)=@_;
2702: my $coursehom=&homeserver($coursenum,$coursedomain);
2703: my $hashid=$coursenum.':'.$coursedomain;
2704: my $dodump=0;
2705: if (!defined($courseresdatacache{$hashid.'.time'})) {
2706: $dodump=1;
2707: } else {
2708: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2709: }
2710: if ($dodump) {
2711: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2712: my ($tmp) = keys(%dumpreply);
2713: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2714: $courseresdatacache{$hashid.'.time'}=time;
2715: $courseresdatacache{$hashid}=\%dumpreply;
2716: }
2717: }
2718: foreach my $item (@which) {
2719: if (defined($courseresdatacache{$hashid}->{$item})) {
2720: return $courseresdatacache{$hashid}->{$item};
2721: }
2722: }
2723: return undef;
2724: }
2725:
2726: # --------------------------------------------------------- Value of a Variable
2727:
2728: sub EXT {
2729: my ($varname,$symbparm,$udom,$uname,)=@_;
2730:
2731: unless ($varname) { return ''; }
2732:
2733: #get real user name/domain, courseid and symb
2734: my $courseid;
2735: if (!($uname && $udom)) {
2736: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2737: if (!$symbparm) { $symbparm=$cursymb; }
2738: } else {
2739: $courseid=$ENV{'request.course.id'};
2740: }
2741:
2742: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2743: my $rest;
2744: if ($therest[0]) {
2745: $rest=join('.',@therest);
2746: } else {
2747: $rest='';
2748: }
2749: my $qualifierrest=$qualifier;
2750: if ($rest) { $qualifierrest.='.'.$rest; }
2751: my $spacequalifierrest=$space;
2752: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2753: if ($realm eq 'user') {
2754: # --------------------------------------------------------------- user.resource
2755: if ($space eq 'resource') {
2756: my %restored=&restore(undef,undef,$udom,$uname);
2757: return $restored{$qualifierrest};
2758: # ----------------------------------------------------------------- user.access
2759: } elsif ($space eq 'access') {
2760: # FIXME - not supporting calls for a specific user
2761: return &allowed($qualifier,$rest);
2762: # ------------------------------------------ user.preferences, user.environment
2763: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2764: if (($uname eq $ENV{'user.name'}) &&
2765: ($udom eq $ENV{'user.domain'})) {
2766: return $ENV{join('.',('environment',$qualifierrest))};
2767: } else {
2768: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2769: return $returnhash{$qualifierrest};
2770: }
2771: # ----------------------------------------------------------------- user.course
2772: } elsif ($space eq 'course') {
2773: # FIXME - not supporting calls for a specific user
2774: return $ENV{join('.',('request.course',$qualifier))};
2775: # ------------------------------------------------------------------- user.role
2776: } elsif ($space eq 'role') {
2777: # FIXME - not supporting calls for a specific user
2778: my ($role,$where)=split(/\./,$ENV{'request.role'});
2779: if ($qualifier eq 'value') {
2780: return $role;
2781: } elsif ($qualifier eq 'extent') {
2782: return $where;
2783: }
2784: # ----------------------------------------------------------------- user.domain
2785: } elsif ($space eq 'domain') {
2786: return $udom;
2787: # ------------------------------------------------------------------- user.name
2788: } elsif ($space eq 'name') {
2789: return $uname;
2790: # ---------------------------------------------------- Any other user namespace
2791: } else {
2792: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2793: my %reply=&get($space,[$item]);
2794: return $reply{$item};
2795: }
2796: } elsif ($realm eq 'query') {
2797: # ---------------------------------------------- pull stuff out of query string
2798: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
2799: return $ENV{'form.'.$space};
2800: } elsif ($realm eq 'request') {
2801: # ------------------------------------------------------------- request.browser
2802: if ($space eq 'browser') {
2803: return $ENV{'browser.'.$qualifier};
2804: # ------------------------------------------------------------ request.filename
2805: } else {
2806: return $ENV{'request.'.$spacequalifierrest};
2807: }
2808: } elsif ($realm eq 'course') {
2809: # ---------------------------------------------------------- course.description
2810: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
2811: } elsif ($realm eq 'resource') {
2812:
2813: if ($courseid eq $ENV{'request.course.id'}) {
2814:
2815: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2816:
2817: # ----------------------------------------------------- Cascading lookup scheme
2818: if (!$symbparm) { $symbparm=&symbread(); }
2819: my $symbp=$symbparm;
2820: my $mapp=(split(/\_\_\_/,$symbp))[0];
2821:
2822: my $symbparm=$symbp.'.'.$spacequalifierrest;
2823: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2824:
2825: my $section;
2826: if (($ENV{'user.name'} eq $uname) &&
2827: ($ENV{'user.domain'} eq $udom)) {
2828: $section=$ENV{'request.course.sec'};
2829: } else {
2830: $section=&usection($udom,$uname,$courseid);
2831: }
2832:
2833: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
2834: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
2835: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
2836:
2837: my $courselevel=$courseid.'.'.$spacequalifierrest;
2838: my $courselevelr=$courseid.'.'.$symbparm;
2839: my $courselevelm=$courseid.'.'.$mapparm;
2840:
2841: # ----------------------------------------------------------- first, check user
2842: my %resourcedata=&get('resourcedata',
2843: [$courselevelr,$courselevelm,$courselevel],
2844: $udom,$uname);
2845: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2846: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2847:
2848: if ($resourcedata{$courselevelr}) {
2849: return $resourcedata{$courselevelr}; }
2850: if ($resourcedata{$courselevelm}) {
2851: return $resourcedata{$courselevelm}; }
2852: if ($resourcedata{$courselevel}) {
2853: return $resourcedata{$courselevel}; }
2854: } else {
2855: if ($resourcedata{$courselevelr}!~/No such file/) {
2856: &logthis("<font color=blue>WARNING:".
2857: " Trying to get resource data for ".
2858: $uname." at ".$udom.": ".
2859: $resourcedata{$courselevelr}."</font>");
2860: }
2861: }
2862:
2863: # -------------------------------------------------------- second, check course
2864:
2865: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
2866: $ENV{'course.'.$courseid.'.domain'},
2867: ($seclevelr,$seclevelm,$seclevel,
2868: $courselevelr,$courselevelm,
2869: $courselevel));
2870: if (defined($coursereply)) { return $coursereply; }
2871:
2872: # ------------------------------------------------------ third, check map parms
2873: my %parmhash=();
2874: my $thisparm='';
2875: if (tie(%parmhash,'GDBM_File',
2876: $ENV{'request.course.fn'}.'_parms.db',
2877: &GDBM_READER(),0640)) {
2878: $thisparm=$parmhash{$symbparm};
2879: untie(%parmhash);
2880: }
2881: if ($thisparm) { return $thisparm; }
2882: }
2883: # --------------------------------------------- last, look in resource metadata
2884:
2885: $spacequalifierrest=~s/\./\_/;
2886: my $filename;
2887: if (!$symbparm) { $symbparm=&symbread(); }
2888: if ($symbparm) {
2889: $filename=(split(/\_\_\_/,$symbparm))[2];
2890: } else {
2891: $filename=$ENV{'request.filename'};
2892: }
2893: my $metadata=&metadata($filename,$spacequalifierrest);
2894: if (defined($metadata)) { return $metadata; }
2895: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
2896: if (defined($metadata)) { return $metadata; }
2897:
2898: # ------------------------------------------------------------------ Cascade up
2899: unless ($space eq '0') {
2900: my ($part,$id)=split(/\_/,$space);
2901: if ($id) {
2902: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2903: $symbparm,$udom,$uname);
2904: if (defined($partgeneral)) { return $partgeneral; }
2905: } else {
2906: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2907: $symbparm,$udom,$uname);
2908: if (defined($resourcegeneral)) { return $resourcegeneral; }
2909: }
2910: }
2911:
2912: # ---------------------------------------------------- Any other user namespace
2913: } elsif ($realm eq 'environment') {
2914: # ----------------------------------------------------------------- environment
2915: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
2916: return $ENV{'environment.'.$spacequalifierrest};
2917: } else {
2918: my %returnhash=&userenvironment($udom,$uname,
2919: $spacequalifierrest);
2920: return $returnhash{$spacequalifierrest};
2921: }
2922: } elsif ($realm eq 'system') {
2923: # ----------------------------------------------------------------- system.time
2924: if ($space eq 'time') {
2925: return time;
2926: }
2927: }
2928: return '';
2929: }
2930:
2931: # ---------------------------------------------------------------- Get metadata
2932:
2933: sub metadata {
2934: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2935:
2936: $uri=&declutter($uri);
2937: # if it is a non metadata possible uri return quickly
2938: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
2939: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
2940: return '';
2941: }
2942: my $filename=$uri;
2943: $uri=~s/\.meta$//;
2944: #
2945: # Is the metadata already cached?
2946: # Look at timestamp of caching
2947: # Everything is cached by the main uri, libraries are never directly cached
2948: #
2949: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
2950: #
2951: # Is this a recursive call for a library?
2952: #
2953: if ($liburi) {
2954: $liburi=&declutter($liburi);
2955: $filename=$liburi;
2956: }
2957: my %metathesekeys=();
2958: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2959: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2960: my $parser=HTML::LCParser->new(\$metastring);
2961: my $token;
2962: undef %metathesekeys;
2963: while ($token=$parser->get_token) {
2964: if ($token->[0] eq 'S') {
2965: if (defined($token->[2]->{'package'})) {
2966: #
2967: # This is a package - get package info
2968: #
2969: my $package=$token->[2]->{'package'};
2970: my $keyroot='';
2971: if ($prefix) {
2972: $keyroot.=$prefix;
2973: } else {
2974: if (defined($token->[2]->{'part'})) {
2975: $keyroot.='_'.$token->[2]->{'part'};
2976: }
2977: }
2978: if (defined($token->[2]->{'id'})) {
2979: $keyroot.='_'.$token->[2]->{'id'};
2980: }
2981: if ($metacache{$uri.':packages'}) {
2982: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2983: } else {
2984: $metacache{$uri.':packages'}=$package.$keyroot;
2985: }
2986: foreach (keys %packagetab) {
2987: if ($_=~/^$package\&/) {
2988: my ($pack,$name,$subp)=split(/\&/,$_);
2989: my $value=$packagetab{$_};
2990: my $part=$keyroot;
2991: $part=~s/^\_//;
2992: if ($subp eq 'display') {
2993: $value.=' [Part: '.$part.']';
2994: }
2995: my $unikey='parameter'.$keyroot.'_'.$name;
2996: $metathesekeys{$unikey}=1;
2997: $metacache{$uri.':'.$unikey.'.part'}=$part;
2998: unless
2999: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3000: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3001: }
3002: }
3003: }
3004: } else {
3005: #
3006: # This is not a package - some other kind of start tag
3007: #
3008: my $entry=$token->[1];
3009: my $unikey;
3010: if ($entry eq 'import') {
3011: $unikey='';
3012: } else {
3013: $unikey=$entry;
3014: }
3015: if ($prefix) {
3016: $unikey.=$prefix;
3017: } else {
3018: if (defined($token->[2]->{'part'})) {
3019: $unikey.='_'.$token->[2]->{'part'};
3020: }
3021: }
3022: if (defined($token->[2]->{'id'})) {
3023: $unikey.='_'.$token->[2]->{'id'};
3024: }
3025:
3026: if ($entry eq 'import') {
3027: #
3028: # Importing a library here
3029: #
3030: if ($depthcount<20) {
3031: my $location=$parser->get_text('/import');
3032: my $dir=$filename;
3033: $dir=~s|[^/]*$||;
3034: $location=&filelocation($dir,$location);
3035: foreach (sort(split(/\,/,&metadata($uri,'keys',
3036: $location,$unikey,
3037: $depthcount+1)))) {
3038: $metathesekeys{$_}=1;
3039: }
3040: }
3041: } else {
3042:
3043: if (defined($token->[2]->{'name'})) {
3044: $unikey.='_'.$token->[2]->{'name'};
3045: }
3046: $metathesekeys{$unikey}=1;
3047: foreach (@{$token->[3]}) {
3048: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3049: }
3050: unless (
3051: $metacache{$uri.':'.$unikey}=&HTML::Entities::decode($parser->get_text('/'.$entry))
3052: ) { $metacache{$uri.':'.$unikey}=
3053: $metacache{$uri.':'.$unikey.'.default'};
3054: }
3055: # end of not-a-package not-a-library import
3056: }
3057: # end of not-a-package start tag
3058: }
3059: # the next is the end of "start tag"
3060: }
3061: }
3062: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3063: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3064: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3065: $metacache{$uri.':cachedtimestamp'}=time;
3066: # this is the end of "was not already recently cached
3067: }
3068: return $metacache{$uri.':'.$what};
3069: }
3070:
3071: sub metadata_generate_part0 {
3072: my ($metadata,$metacache,$uri) = @_;
3073: my %allnames;
3074: foreach my $metakey (sort keys %$metadata) {
3075: if ($metakey=~/^parameter\_(.*)/) {
3076: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3077: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3078: if (! exists($$metadata{'parameter_0_'.$name})) {
3079: $allnames{$name}=$part;
3080: }
3081: }
3082: }
3083: foreach my $name (keys(%allnames)) {
3084: $$metadata{"parameter_0_$name"}=1;
3085: my $key="$uri:parameter_0_$name";
3086: $$metacache{"$key.part"}='0';
3087: $$metacache{"$key.name"}=$name;
3088: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3089: $allnames{$name}.'_'.$name.
3090: '.type'};
3091: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3092: '.display'};
3093: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3094: $olddis=~s/$expr/\[Part: 0\]/;
3095: $$metacache{"$key.display"}=$olddis;
3096: }
3097: }
3098:
3099: # ------------------------------------------------- Update symbolic store links
3100:
3101: sub symblist {
3102: my ($mapname,%newhash)=@_;
3103: $mapname=declutter($mapname);
3104: my %hash;
3105: if (($ENV{'request.course.fn'}) && (%newhash)) {
3106: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3107: &GDBM_WRCREAT(),0640)) {
3108: foreach (keys %newhash) {
3109: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3110: }
3111: if (untie(%hash)) {
3112: return 'ok';
3113: }
3114: }
3115: }
3116: return 'error';
3117: }
3118:
3119: # --------------------------------------------------------------- Verify a symb
3120:
3121: sub symbverify {
3122: my ($symb,$thisfn)=@_;
3123: $thisfn=&declutter($thisfn);
3124: # direct jump to resource in page or to a sequence - will construct own symbs
3125: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3126: # check URL part
3127: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3128: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3129:
3130: $symb=&symbclean($symb);
3131:
3132: my %bighash;
3133: my $okay=0;
3134: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3135: &GDBM_READER(),0640)) {
3136: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3137: unless ($ids) {
3138: $ids=$bighash{'ids_/'.$thisfn};
3139: }
3140: if ($ids) {
3141: # ------------------------------------------------------------------- Has ID(s)
3142: foreach (split(/\,/,$ids)) {
3143: my ($mapid,$resid)=split(/\./,$_);
3144: if (
3145: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3146: eq $symb) {
3147: $okay=1;
3148: }
3149: }
3150: }
3151: untie(%bighash);
3152: }
3153: return $okay;
3154: }
3155:
3156: # --------------------------------------------------------------- Clean-up symb
3157:
3158: sub symbclean {
3159: my $symb=shift;
3160:
3161: # remove version from map
3162: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3163:
3164: # remove version from URL
3165: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3166:
3167: return $symb;
3168: }
3169:
3170: # ------------------------------------------------------ Return symb list entry
3171:
3172: sub symbread {
3173: my ($thisfn,$donotrecurse)=@_;
3174: # no filename provided? try from environment
3175: unless ($thisfn) {
3176: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3177: $thisfn=$ENV{'request.filename'};
3178: }
3179: # is that filename actually a symb? Verify, clean, and return
3180: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3181: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3182: }
3183: $thisfn=declutter($thisfn);
3184: my %hash;
3185: my %bighash;
3186: my $syval='';
3187: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3188: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3189: &GDBM_READER(),0640)) {
3190: $syval=$hash{$thisfn};
3191: untie(%hash);
3192: }
3193: # ---------------------------------------------------------- There was an entry
3194: if ($syval) {
3195: unless ($syval=~/\_\d+$/) {
3196: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3197: &appenv('request.ambiguous' => $thisfn);
3198: return '';
3199: }
3200: $syval.=$1;
3201: }
3202: } else {
3203: # ------------------------------------------------------- Was not in symb table
3204: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3205: &GDBM_READER(),0640)) {
3206: # ---------------------------------------------- Get ID(s) for current resource
3207: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3208: unless ($ids) {
3209: $ids=$bighash{'ids_/'.$thisfn};
3210: }
3211: unless ($ids) {
3212: # alias?
3213: $ids=$bighash{'mapalias_'.$thisfn};
3214: }
3215: if ($ids) {
3216: # ------------------------------------------------------------------- Has ID(s)
3217: my @possibilities=split(/\,/,$ids);
3218: if ($#possibilities==0) {
3219: # ----------------------------------------------- There is only one possibility
3220: my ($mapid,$resid)=split(/\./,$ids);
3221: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3222: } elsif (!$donotrecurse) {
3223: # ------------------------------------------ There is more than one possibility
3224: my $realpossible=0;
3225: foreach (@possibilities) {
3226: my $file=$bighash{'src_'.$_};
3227: if (&allowed('bre',$file)) {
3228: my ($mapid,$resid)=split(/\./,$_);
3229: if ($bighash{'map_type_'.$mapid} ne 'page') {
3230: $realpossible++;
3231: $syval=declutter($bighash{'map_id_'.$mapid}).
3232: '___'.$resid;
3233: }
3234: }
3235: }
3236: if ($realpossible!=1) { $syval=''; }
3237: } else {
3238: $syval='';
3239: }
3240: }
3241: untie(%bighash)
3242: }
3243: }
3244: if ($syval) {
3245: return &symbclean($syval.'___'.$thisfn);
3246: }
3247: }
3248: &appenv('request.ambiguous' => $thisfn);
3249: return '';
3250: }
3251:
3252: # ---------------------------------------------------------- Return random seed
3253:
3254: sub numval {
3255: my $txt=shift;
3256: $txt=~tr/A-J/0-9/;
3257: $txt=~tr/a-j/0-9/;
3258: $txt=~tr/K-T/0-9/;
3259: $txt=~tr/k-t/0-9/;
3260: $txt=~tr/U-Z/0-5/;
3261: $txt=~tr/u-z/0-5/;
3262: $txt=~s/\D//g;
3263: return int($txt);
3264: }
3265:
3266: sub rndseed {
3267: my ($symb,$courseid,$domain,$username)=@_;
3268: if (!$symb) {
3269: unless ($symb=&symbread()) { return time; }
3270: }
3271: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3272: if (!$domain) {$domain=$ENV{'user.domain'};}
3273: if (!$username) {$username=$ENV{'user.name'};}
3274: {
3275: use integer;
3276: my $symbchck=unpack("%32C*",$symb) << 27;
3277: my $symbseed=numval($symb) << 22;
3278: my $namechck=unpack("%32C*",$username) << 17;
3279: my $nameseed=numval($username) << 12;
3280: my $domainseed=unpack("%32C*",$domain) << 7;
3281: my $courseseed=unpack("%32C*",$courseid);
3282: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3283: #uncommenting these lines can break things!
3284: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3285: #&Apache::lonxml::debug("rndseed :$num:$symb");
3286: return $num;
3287: }
3288: }
3289:
3290: sub ireceipt {
3291: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3292: my $cuname=unpack("%32C*",$funame);
3293: my $cudom=unpack("%32C*",$fudom);
3294: my $cucourseid=unpack("%32C*",$fucourseid);
3295: my $cusymb=unpack("%32C*",$fusymb);
3296: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3297: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3298: ($cunique%$cuname+
3299: $cunique%$cudom+
3300: $cusymb%$cuname+
3301: $cusymb%$cudom+
3302: $cucourseid%$cuname+
3303: $cucourseid%$cudom);
3304: }
3305:
3306: sub receipt {
3307: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3308: return &ireceipt($name,$domain,$courseid,$symb);
3309: }
3310:
3311: # ------------------------------------------------------------ Serves up a file
3312: # returns either the contents of the file or a -1
3313: sub getfile {
3314: my $file=shift;
3315: if ($file=~/^\/*uploaded\//) { # user file
3316: my $ua=new LWP::UserAgent;
3317: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3318: my $response=$ua->request($request);
3319: if ($response->is_success()) {
3320: return $response->content;
3321: } else {
3322: return -1;
3323: }
3324: } else { # normal file from res space
3325: &repcopy($file);
3326: if (! -e $file ) { return -1; };
3327: my $fh=Apache::File->new($file);
3328: my $a='';
3329: while (<$fh>) { $a .=$_; }
3330: return $a;
3331: }
3332: }
3333:
3334: sub filelocation {
3335: my ($dir,$file) = @_;
3336: my $location;
3337: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3338: if ($file=~m:^/~:) { # is a contruction space reference
3339: $location = $file;
3340: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3341: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3342: $location=$file;
3343: } else {
3344: $file=~s/^$perlvar{'lonDocRoot'}//;
3345: $file=~s:^/*res::;
3346: if ( !( $file =~ m:^/:) ) {
3347: $location = $dir. '/'.$file;
3348: } else {
3349: $location = '/home/httpd/html/res'.$file;
3350: }
3351: }
3352: $location=~s://+:/:g; # remove duplicate /
3353: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3354: return $location;
3355: }
3356:
3357: sub hreflocation {
3358: my ($dir,$file)=@_;
3359: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3360: my $finalpath=filelocation($dir,$file);
3361: $finalpath=~s/^\/home\/httpd\/html//;
3362: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3363: return $finalpath;
3364: } else {
3365: return $file;
3366: }
3367: }
3368:
3369: # ------------------------------------------------------------- Declutters URLs
3370:
3371: sub declutter {
3372: my $thisfn=shift;
3373: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3374: $thisfn=~s/^\///;
3375: $thisfn=~s/^res\///;
3376: $thisfn=~s/\?.+$//;
3377: return $thisfn;
3378: }
3379:
3380: # ------------------------------------------------------------- Clutter up URLs
3381:
3382: sub clutter {
3383: my $thisfn='/'.&declutter(shift);
3384: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3385: $thisfn='/res'.$thisfn;
3386: }
3387: return $thisfn;
3388: }
3389:
3390: # -------------------------------------------------------- Escape Special Chars
3391:
3392: sub escape {
3393: my $str=shift;
3394: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3395: return $str;
3396: }
3397:
3398: # ----------------------------------------------------- Un-Escape Special Chars
3399:
3400: sub unescape {
3401: my $str=shift;
3402: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3403: return $str;
3404: }
3405:
3406: # ================================================================ Main Program
3407:
3408: sub goodbye {
3409: &logthis("Starting Shut down");
3410: &flushcourselogs();
3411: &logthis("Shutting down");
3412: }
3413:
3414: BEGIN {
3415: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3416: unless ($readit) {
3417: {
3418: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3419:
3420: while (my $configline=<$config>) {
3421: if ($configline =~ /^[^\#]*PerlSetVar/) {
3422: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3423: chomp($varvalue);
3424: $perlvar{$varname}=$varvalue;
3425: }
3426: }
3427: }
3428: {
3429: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3430:
3431: while (my $configline=<$config>) {
3432: if ($configline =~ /^[^\#]*PerlSetVar/) {
3433: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3434: chomp($varvalue);
3435: $perlvar{$varname}=$varvalue;
3436: }
3437: }
3438: }
3439:
3440: # ------------------------------------------------------------- Read hosts file
3441: {
3442: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3443:
3444: while (my $configline=<$config>) {
3445: chomp($configline);
3446: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3447: if ($id && $domain && $role && $name && $ip) {
3448: $hostname{$id}=$name;
3449: $hostdom{$id}=$domain;
3450: $hostip{$id}=$ip;
3451: if ($domdescr) { $domaindescription{$domain}=$domdescr; }
3452: if ($role eq 'library') { $libserv{$id}=$name; }
3453: } else {
3454: if ($configline) {
3455: &logthis("Skipping hosts.tab line -$configline-");
3456: }
3457: }
3458: }
3459: }
3460:
3461: # ------------------------------------------------------ Read spare server file
3462: {
3463: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3464:
3465: while (my $configline=<$config>) {
3466: chomp($configline);
3467: if ($configline) {
3468: $spareid{$configline}=1;
3469: }
3470: }
3471: }
3472: # ------------------------------------------------------------ Read permissions
3473: {
3474: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3475:
3476: while (my $configline=<$config>) {
3477: chomp($configline);
3478: if ($configline) {
3479: my ($role,$perm)=split(/ /,$configline);
3480: if ($perm ne '') { $pr{$role}=$perm; }
3481: }
3482: }
3483: }
3484:
3485: # -------------------------------------------- Read plain texts for permissions
3486: {
3487: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3488:
3489: while (my $configline=<$config>) {
3490: chomp($configline);
3491: if ($configline) {
3492: my ($short,$plain)=split(/:/,$configline);
3493: if ($plain ne '') { $prp{$short}=$plain; }
3494: }
3495: }
3496: }
3497:
3498: # ---------------------------------------------------------- Read package table
3499: {
3500: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3501:
3502: while (my $configline=<$config>) {
3503: chomp($configline);
3504: my ($short,$plain)=split(/:/,$configline);
3505: my ($pack,$name)=split(/\&/,$short);
3506: if ($plain ne '') {
3507: $packagetab{$pack.'&'.$name.'&name'}=$name;
3508: $packagetab{$short}=$plain;
3509: }
3510: }
3511: }
3512:
3513: %metacache=();
3514:
3515: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
3516: $dumpcount=0;
3517:
3518: &logtouch();
3519: &logthis('<font color=yellow>INFO: Read configuration</font>');
3520: $readit=1;
3521: }
3522: }
3523:
3524: 1;
3525: __END__
3526:
3527: =pod
3528:
3529: =head1 NAME
3530:
3531: Apache::lonnet - Subroutines to ask questions about things in the network.
3532:
3533: =head1 SYNOPSIS
3534:
3535: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3536:
3537: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3538:
3539: Common parameters:
3540:
3541: =over 4
3542:
3543: =item *
3544:
3545: $uname : an internal username (if $cname expecting a course Id specifically)
3546:
3547: =item *
3548:
3549: $udom : a domain (if $cdom expecting a course's domain specifically)
3550:
3551: =item *
3552:
3553: $symb : a resource instance identifier
3554:
3555: =item *
3556:
3557: $namespace : the name of a .db file that contains the data needed or
3558: being set.
3559:
3560: =back
3561:
3562: =head1 INTRODUCTION
3563:
3564: This module provides subroutines which interact with the
3565: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3566: - classes
3567: - users
3568: - resources
3569:
3570: For many of these objects you can also use this to store data about
3571: them or modify them in various ways.
3572:
3573: This is part of the LearningOnline Network with CAPA project
3574: described at http://www.lon-capa.org.
3575:
3576: =head1 RETURN MESSAGES
3577:
3578: =over 4
3579:
3580: =item *
3581:
3582: con_lost : unable to contact remote host
3583:
3584: =item *
3585:
3586: con_delayed : unable to contact remote host, message will be delivered
3587: when the connection is brought back up
3588:
3589: =item *
3590:
3591: con_failed : unable to contact remote host and unable to save message
3592: for later delivery
3593:
3594: =item *
3595:
3596: error: : an error a occured, a description of the error follows the :
3597:
3598: =item *
3599:
3600: no_such_host : unable to fund a host associated with the user/domain
3601: that was requested
3602:
3603: =back
3604:
3605: =head1 PUBLIC SUBROUTINES
3606:
3607: =head2 Session Environment Functions
3608:
3609: =over 4
3610:
3611: =item *
3612:
3613: appenv(%hash) : the value of %hash is written to the user envirnoment
3614: file, and will be restored for each access this user makes during this
3615: session, also modifies the %ENV for the current process
3616:
3617: =item *
3618:
3619: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3620:
3621: =back
3622:
3623: =head2 User Information
3624:
3625: =over 4
3626:
3627: =item *
3628:
3629: queryauthenticate($uname,$udom) : try to determine user's current
3630: authentication scheme
3631:
3632: =item *
3633:
3634: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3635: servers (first use the current one), $upass should be the users password
3636:
3637: =item *
3638:
3639: homeserver($uname,$udom) : find the server which has the user's
3640: directory and files (there must be only one), this caches the answer,
3641: and also caches if there is a borken connection.
3642:
3643: =item *
3644:
3645: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3646: unique resource in a domain, there must be only 1 ID per username, and
3647: only 1 username per ID in a specific domain) (returns hash:
3648: id=>name,id=>name)
3649:
3650: =item *
3651:
3652: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3653: name=>id,name=>id)
3654:
3655: =item *
3656:
3657: idput($udom,%ids) : store away a list of names and associated IDs
3658:
3659: =item *
3660:
3661: rolesinit($udom,$username,$authhost) : get user privileges
3662:
3663: =item *
3664:
3665: usection($udom,$uname,$cname) : finds the section of student in the
3666: course $cname, return section name/number or '' for "not in course"
3667: and '-1' for "no section"
3668:
3669: =item *
3670:
3671: userenvironment($udom,$uname,@what) : gets the values of the keys
3672: passed in @what from the requested user's environment, returns a hash
3673:
3674: =back
3675:
3676: =head2 User Roles
3677:
3678: =over 4
3679:
3680: =item *
3681:
3682: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
3683: actions
3684: F: full access
3685: U,I,K: authentication modes (cxx only)
3686: '': forbidden
3687: 1: user needs to choose course
3688: 2: browse allowed
3689:
3690: =item *
3691:
3692: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
3693: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
3694: and course level
3695:
3696: =item *
3697:
3698: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
3699: explanation of a user role term
3700:
3701: =back
3702:
3703: =head2 User Modification
3704:
3705: =over 4
3706:
3707: =item *
3708:
3709: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
3710: user for the level given by URL. Optional start and end dates (leave empty
3711: string or zero for "no date")
3712:
3713: =item *
3714:
3715: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
3716: change a users, password, possible return values are: ok,
3717: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
3718: refused
3719:
3720: =item *
3721:
3722: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
3723:
3724: =item *
3725:
3726: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
3727: modify user
3728:
3729: =item *
3730:
3731: modifystudent
3732:
3733: modify a students enrollment and identification information.
3734: The course id is resolved based on the current users environment.
3735: This means the envoking user must be a course coordinator or otherwise
3736: associated with a course.
3737:
3738: This call is essentially a wrapper for lonnet::modifyuser and
3739: lonnet::modify_student_enrollment
3740:
3741: Inputs:
3742:
3743: =over 4
3744:
3745: =item B<$udom> Students loncapa domain
3746:
3747: =item B<$uname> Students loncapa login name
3748:
3749: =item B<$uid> Students id/student number
3750:
3751: =item B<$umode> Students authentication mode
3752:
3753: =item B<$upass> Students password
3754:
3755: =item B<$first> Students first name
3756:
3757: =item B<$middle> Students middle name
3758:
3759: =item B<$last> Students last name
3760:
3761: =item B<$gene> Students generation
3762:
3763: =item B<$usec> Students section in course
3764:
3765: =item B<$end> Unix time of the roles expiration
3766:
3767: =item B<$start> Unix time of the roles start date
3768:
3769: =item B<$forceid> If defined, allow $uid to be changed
3770:
3771: =item B<$desiredhome> server to use as home server for student
3772:
3773: =back
3774:
3775: =item *
3776:
3777: modify_student_enrollment
3778:
3779: Change a students enrollment status in a class. The environment variable
3780: 'role.request.course' must be defined for this function to proceed.
3781:
3782: Inputs:
3783:
3784: =over 4
3785:
3786: =item $udom, students domain
3787:
3788: =item $uname, students name
3789:
3790: =item $uid, students user id
3791:
3792: =item $first, students first name
3793:
3794: =item $middle
3795:
3796: =item $last
3797:
3798: =item $gene
3799:
3800: =item $usec
3801:
3802: =item $end
3803:
3804: =item $start
3805:
3806: =back
3807:
3808:
3809: =item *
3810:
3811: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
3812: custom role; give a custom role to a user for the level given by URL. Specify
3813: name and domain of role author, and role name
3814:
3815: =item *
3816:
3817: revokerole($udom,$uname,$url,$role) : revoke a role for url
3818:
3819: =item *
3820:
3821: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
3822:
3823: =back
3824:
3825: =head2 Course Infomation
3826:
3827: =over 4
3828:
3829: =item *
3830:
3831: coursedescription($courseid) : course description
3832:
3833: =item *
3834:
3835: courseresdata($coursenum,$coursedomain,@which) : request for current
3836: parameter setting for a specific course, @what should be a list of
3837: parameters to ask about. This routine caches answers for 5 minutes.
3838:
3839: =back
3840:
3841: =head2 Course Modification
3842:
3843: =over 4
3844:
3845: =item *
3846:
3847: writecoursepref($courseid,%prefs) : write preferences (environment
3848: database) for a course
3849:
3850: =item *
3851:
3852: createcourse($udom,$description,$url) : make/modify course
3853:
3854: =back
3855:
3856: =head2 Resource Subroutines
3857:
3858: =over 4
3859:
3860: =item *
3861:
3862: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
3863:
3864: =item *
3865:
3866: repcopy($filename) : subscribes to the requested file, and attempts to
3867: replicate from the owning library server, Might return
3868: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
3869: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
3870: resource. Expects the local filesystem pathname
3871: (/home/httpd/html/res/....)
3872:
3873: =back
3874:
3875: =head2 Resource Information
3876:
3877: =over 4
3878:
3879: =item *
3880:
3881: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
3882: a vairety of different possible values, $varname should be a request
3883: string, and the other parameters can be used to specify who and what
3884: one is asking about.
3885:
3886: Possible values for $varname are environment.lastname (or other item
3887: from the envirnment hash), user.name (or someother aspect about the
3888: user), resource.0.maxtries (or some other part and parameter of a
3889: resource)
3890:
3891: =item *
3892:
3893: directcondval($number) : get current value of a condition; reads from a state
3894: string
3895:
3896: =item *
3897:
3898: condval($condidx) : value of condition index based on state
3899:
3900: =item *
3901:
3902: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
3903: resource's metadata, $what should be either a specific key, or either
3904: 'keys' (to get a list of possible keys) or 'packages' to get a list of
3905: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
3906:
3907: this function automatically caches all requests
3908:
3909: =item *
3910:
3911: metadata_query($query,$custom,$customshow) : make a metadata query against the
3912: network of library servers; returns file handle of where SQL and regex results
3913: will be stored for query
3914:
3915: =item *
3916:
3917: symbread($filename) : return symbolic list entry (filename argument optional);
3918: returns the data handle
3919:
3920: =item *
3921:
3922: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
3923: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
3924: failure, user must be in a course, as it assumes the existance of the
3925: course initi hash, and uses $ENV('request.course.id'}
3926:
3927:
3928: =item *
3929:
3930: symbclean($symb) : removes versions numbers from a symb, returns the
3931: cleaned symb
3932:
3933: =item *
3934:
3935: is_on_map($uri) : checks if the $uri is somewhere on the current
3936: course map, user must be in a course for it to work.
3937:
3938: =item *
3939:
3940: numval($salt) : return random seed value (addend for rndseed)
3941:
3942: =item *
3943:
3944: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
3945: a random seed, all arguments are optional, if they aren't sent it uses the
3946: environment to derive them. Note: if symb isn't sent and it can't get one
3947: from &symbread it will use the current time as its return value
3948:
3949: =item *
3950:
3951: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
3952: unfakeable, receipt
3953:
3954: =item *
3955:
3956: receipt() : API to ireceipt working off of ENV values; given out to users
3957:
3958: =item *
3959:
3960: countacc($url) : count the number of accesses to a given URL
3961:
3962: =item *
3963:
3964: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
3965:
3966: =item *
3967:
3968: checkin($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 $tcrsid)
3969:
3970: =item *
3971:
3972: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
3973:
3974: =item *
3975:
3976: devalidate($symb) : devalidate temporary spreadsheet calculations,
3977: forcing spreadsheet to reevaluate the resource scores next time.
3978:
3979: =back
3980:
3981: =head2 Storing/Retreiving Data
3982:
3983: =over 4
3984:
3985: =item *
3986:
3987: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
3988: for this url; hashref needs to be given and should be a \%hashname; the
3989: remaining args aren't required and if they aren't passed or are '' they will
3990: be derived from the ENV
3991:
3992: =item *
3993:
3994: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
3995: uses critical subroutine
3996:
3997: =item *
3998:
3999: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4000: all args are optional
4001:
4002: =item *
4003:
4004: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4005: works very similar to store/cstore, but all data is stored in a
4006: temporary location and can be reset using tmpreset, $storehash should
4007: be a hash reference, returns nothing on success
4008:
4009: =item *
4010:
4011: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4012: similar to restore, but all data is stored in a temporary location and
4013: can be reset using tmpreset. Returns a hash of values on success,
4014: error string otherwise.
4015:
4016: =item *
4017:
4018: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4019: deltes all keys for $symb form the temporary storage hash.
4020:
4021: =item *
4022:
4023: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4024: reference filled in from namesp ($udom and $uname are optional)
4025:
4026: =item *
4027:
4028: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4029: namesp ($udom and $uname are optional)
4030:
4031: =item *
4032:
4033: dump($namespace,$udom,$uname,$regexp) :
4034: dumps the complete (or key matching regexp) namespace into a hash
4035: ($udom, $uname and $regexp are optional)
4036:
4037: =item *
4038:
4039: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4040: ($udom and $uname are optional)
4041:
4042: =item *
4043:
4044: cput($namespace,$storehash,$udom,$uname) : critical put
4045: ($udom and $uname are optional)
4046:
4047: =item *
4048:
4049: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4050: reference filled in from namesp (encrypts the return communication)
4051: ($udom and $uname are optional)
4052:
4053: =item *
4054:
4055: log($udom,$name,$home,$message) : write to permanent log for user; use
4056: critical subroutine
4057:
4058: =back
4059:
4060: =head2 Network Status Functions
4061:
4062: =over 4
4063:
4064: =item *
4065:
4066: dirlist($uri) : return directory list based on URI
4067:
4068: =item *
4069:
4070: spareserver() : find server with least workload from spare.tab
4071:
4072: =back
4073:
4074: =head2 Apache Request
4075:
4076: =over 4
4077:
4078: =item *
4079:
4080: ssi($url,%hash) : server side include, does a complete request cycle on url to
4081: localhost, posts hash
4082:
4083: =back
4084:
4085: =head2 Data to String to Data
4086:
4087: =over 4
4088:
4089: =item *
4090:
4091: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4092: and '&' separators, supports elements that are arrayrefs and hashrefs
4093:
4094: =item *
4095:
4096: hashref2str($hashref) : convert a hashref into a string complete with
4097: escaping and '=' and '&' separators, supports elements that are
4098: arrayrefs and hashrefs
4099:
4100: =item *
4101:
4102: arrayref2str($arrayref) : convert an arrayref into a string complete
4103: with escaping and '&' separators, supports elements that are arrayrefs
4104: and hashrefs
4105:
4106: =item *
4107:
4108: str2hash($string) : convert string to hash using unescaping and
4109: splitting on '=' and '&', supports elements that are arrayrefs and
4110: hashrefs
4111:
4112: =item *
4113:
4114: str2array($string) : convert string to hash using unescaping and
4115: splitting on '&', supports elements that are arrayrefs and hashrefs
4116:
4117: =back
4118:
4119: =head2 Logging Routines
4120:
4121: =over 4
4122:
4123: These routines allow one to make log messages in the lonnet.log and
4124: lonnet.perm logfiles.
4125:
4126: =item *
4127:
4128: logtouch() : make sure the logfile, lonnet.log, exists
4129:
4130: =item *
4131:
4132: logthis() : append message to the normal lonnet.log file, it gets
4133: preiodically rolled over and deleted.
4134:
4135: =item *
4136:
4137: logperm() : append a permanent message to lonnet.perm.log, this log
4138: file never gets deleted by any automated portion of the system, only
4139: messages of critical importance should go in here.
4140:
4141: =back
4142:
4143: =head2 General File Helper Routines
4144:
4145: =over 4
4146:
4147: =item *
4148:
4149: getfile($file) : returns the entire contents of a file or -1; it
4150: properly subscribes to and replicates the file if neccessary.
4151:
4152: =item *
4153:
4154: filelocation($dir,$file) : returns file system location of a file
4155: based on URI; meant to be "fairly clean" absolute reference, $dir is a
4156: directory that relative $file lookups are to looked in ($dir of /a/dir
4157: and a file of ../bob will become /a/bob)
4158:
4159: =item *
4160:
4161: hreflocation($dir,$file) : returns file system location or a URL; same as
4162: filelocation except for hrefs
4163:
4164: =item *
4165:
4166: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
4167:
4168: =back
4169:
4170: =head2 HTTP Helper Routines
4171:
4172: =over 4
4173:
4174: =item *
4175:
4176: escape() : unpack non-word characters into CGI-compatible hex codes
4177:
4178: =item *
4179:
4180: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
4181:
4182: =back
4183:
4184: =head1 PRIVATE SUBROUTINES
4185:
4186: =head2 Underlying communication routines (Shouldn't call)
4187:
4188: =over 4
4189:
4190: =item *
4191:
4192: subreply() : tries to pass a message to lonc, returns con_lost if incapable
4193:
4194: =item *
4195:
4196: reply() : uses subreply to send a message to remote machine, logs all failures
4197:
4198: =item *
4199:
4200: critical() : passes a critical message to another server; if cannot
4201: get through then place message in connection buffer directory and
4202: returns con_delayed, if incapable of saving message, returns
4203: con_failed
4204:
4205: =item *
4206:
4207: reconlonc() : tries to reconnect lonc client processes.
4208:
4209: =back
4210:
4211: =head2 Resource Access Logging
4212:
4213: =over 4
4214:
4215: =item *
4216:
4217: flushcourselogs() : flush (save) buffer logs and access logs
4218:
4219: =item *
4220:
4221: courselog($what) : save message for course in hash
4222:
4223: =item *
4224:
4225: courseacclog($what) : save message for course using &courselog(). Perform
4226: special processing for specific resource types (problems, exams, quizzes, etc).
4227:
4228: =item *
4229:
4230: goodbye() : flush course logs and log shutting down; it is called in srm.conf
4231: as a PerlChildExitHandler
4232:
4233: =back
4234:
4235: =head2 Other
4236:
4237: =over 4
4238:
4239: =item *
4240:
4241: symblist($mapname,%newhash) : update symbolic storage links
4242:
4243: =back
4244:
4245: =cut
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