1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.273 2002/08/23 21:31:09 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 02/27/01 Scott Harrison
51: # 3/2 Gerd Kortemeyer
52: # 3/15,3/19 Scott Harrison
53: # 3/19,3/20 Gerd Kortemeyer
54: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
55: # 5/26,5/28 Gerd Kortemeyer
56: # 5/30 H. K. Ng
57: # 6/1 Gerd Kortemeyer
58: # July Guy Albertelli
59: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
60: # 10/2 Gerd Kortemeyer
61: # 10/5,10/10,11/13,11/15 Scott Harrison
62: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
63: # 12/5 Matthew Hall
64: # 12/5 Guy Albertelli
65: # 12/6,12/7,12/12 Gerd Kortemeyer
66: # 12/18 Scott Harrison
67: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
68: # YEAR=2002
69: # 1/4,2/4,2/7 Gerd Kortemeyer
70: #
71: ###
72:
73: package Apache::lonnet;
74:
75: use strict;
76: use Apache::File;
77: use LWP::UserAgent();
78: use HTTP::Headers;
79: use vars
80: qw(%perlvar %hostname %homecache %badServerCache %hostip %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: my $readit;
90:
91: # --------------------------------------------------------------------- Logging
92:
93: sub logtouch {
94: my $execdir=$perlvar{'lonDaemons'};
95: unless (-e "$execdir/logs/lonnet.log") {
96: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
97: close $fh;
98: }
99: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
100: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
101: }
102:
103: sub logthis {
104: my $message=shift;
105: my $execdir=$perlvar{'lonDaemons'};
106: my $now=time;
107: my $local=localtime($now);
108: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
109: print $fh "$local ($$): $message\n";
110: return 1;
111: }
112:
113: sub logperm {
114: my $message=shift;
115: my $execdir=$perlvar{'lonDaemons'};
116: my $now=time;
117: my $local=localtime($now);
118: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
119: print $fh "$now:$message:$local\n";
120: return 1;
121: }
122:
123: # -------------------------------------------------- Non-critical communication
124: sub subreply {
125: my ($cmd,$server)=@_;
126: my $peerfile="$perlvar{'lonSockDir'}/$server";
127: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
128: Type => SOCK_STREAM,
129: Timeout => 10)
130: or return "con_lost";
131: print $client "$cmd\n";
132: my $answer=<$client>;
133: if (!$answer) { $answer="con_lost"; }
134: chomp($answer);
135: return $answer;
136: }
137:
138: sub reply {
139: my ($cmd,$server)=@_;
140: unless (defined($hostname{$server})) { return 'no_such_host'; }
141: my $answer=subreply($cmd,$server);
142: if ($answer eq 'con_lost') {
143: #sleep 5;
144: #$answer=subreply($cmd,$server);
145: #if ($answer eq 'con_lost') {
146: # &logthis("Second attempt con_lost on $server");
147: # my $peerfile="$perlvar{'lonSockDir'}/$server";
148: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
149: # Type => SOCK_STREAM,
150: # Timeout => 10)
151: # or return "con_lost";
152: # &logthis("Killing socket");
153: # print $client "close_connection_exit\n";
154: #sleep 5;
155: # $answer=subreply($cmd,$server);
156: #}
157: }
158: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
159: &logthis("<font color=blue>WARNING:".
160: " $cmd to $server returned $answer</font>");
161: }
162: return $answer;
163: }
164:
165: # ----------------------------------------------------------- Send USR1 to lonc
166:
167: sub reconlonc {
168: my $peerfile=shift;
169: &logthis("Trying to reconnect for $peerfile");
170: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
171: if (my $fh=Apache::File->new("$loncfile")) {
172: my $loncpid=<$fh>;
173: chomp($loncpid);
174: if (kill 0 => $loncpid) {
175: &logthis("lonc at pid $loncpid responding, sending USR1");
176: kill USR1 => $loncpid;
177: sleep 1;
178: if (-e "$peerfile") { return; }
179: &logthis("$peerfile still not there, give it another try");
180: sleep 5;
181: if (-e "$peerfile") { return; }
182: &logthis(
183: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
184: } else {
185: &logthis(
186: "<font color=blue>WARNING:".
187: " lonc at pid $loncpid not responding, giving up</font>");
188: }
189: } else {
190: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
191: }
192: }
193:
194: # ------------------------------------------------------ Critical communication
195:
196: sub critical {
197: my ($cmd,$server)=@_;
198: unless ($hostname{$server}) {
199: &logthis("<font color=blue>WARNING:".
200: " Critical message to unknown server ($server)</font>");
201: return 'no_such_host';
202: }
203: my $answer=reply($cmd,$server);
204: if ($answer eq 'con_lost') {
205: my $pingreply=reply('ping',$server);
206: &reconlonc("$perlvar{'lonSockDir'}/$server");
207: my $pongreply=reply('pong',$server);
208: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
209: $answer=reply($cmd,$server);
210: if ($answer eq 'con_lost') {
211: my $now=time;
212: my $middlename=$cmd;
213: $middlename=substr($middlename,0,16);
214: $middlename=~s/\W//g;
215: my $dfilename=
216: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
217: {
218: my $dfh;
219: if ($dfh=Apache::File->new(">$dfilename")) {
220: print $dfh "$cmd\n";
221: }
222: }
223: sleep 2;
224: my $wcmd='';
225: {
226: my $dfh;
227: if ($dfh=Apache::File->new("$dfilename")) {
228: $wcmd=<$dfh>;
229: }
230: }
231: chomp($wcmd);
232: if ($wcmd eq $cmd) {
233: &logthis("<font color=blue>WARNING: ".
234: "Connection buffer $dfilename: $cmd</font>");
235: &logperm("D:$server:$cmd");
236: return 'con_delayed';
237: } else {
238: &logthis("<font color=red>CRITICAL:"
239: ." Critical connection failed: $server $cmd</font>");
240: &logperm("F:$server:$cmd");
241: return 'con_failed';
242: }
243: }
244: }
245: return $answer;
246: }
247:
248: # ---------------------------------------------------------- Append Environment
249:
250: sub appenv {
251: my %newenv=@_;
252: foreach (keys %newenv) {
253: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
254: &logthis("<font color=blue>WARNING: ".
255: "Attempt to modify environment ".$_." to ".$newenv{$_}
256: .'</font>');
257: delete($newenv{$_});
258: } else {
259: $ENV{$_}=$newenv{$_};
260: }
261: }
262:
263: my $lockfh;
264: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
265: return 'error: '.$!;
266: }
267: unless (flock($lockfh,LOCK_EX)) {
268: &logthis("<font color=blue>WARNING: ".
269: 'Could not obtain exclusive lock in appenv: '.$!);
270: $lockfh->close();
271: return 'error: '.$!;
272: }
273:
274: my @oldenv;
275: {
276: my $fh;
277: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
278: return 'error: '.$!;
279: }
280: @oldenv=<$fh>;
281: $fh->close();
282: }
283: for (my $i=0; $i<=$#oldenv; $i++) {
284: chomp($oldenv[$i]);
285: if ($oldenv[$i] ne '') {
286: my ($name,$value)=split(/=/,$oldenv[$i]);
287: unless (defined($newenv{$name})) {
288: $newenv{$name}=$value;
289: }
290: }
291: }
292: {
293: my $fh;
294: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
295: return 'error';
296: }
297: my $newname;
298: foreach $newname (keys %newenv) {
299: print $fh "$newname=$newenv{$newname}\n";
300: }
301: $fh->close();
302: }
303:
304: $lockfh->close();
305: return 'ok';
306: }
307: # ----------------------------------------------------- Delete from Environment
308:
309: sub delenv {
310: my $delthis=shift;
311: my %newenv=();
312: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
313: &logthis("<font color=blue>WARNING: ".
314: "Attempt to delete from environment ".$delthis);
315: return 'error';
316: }
317: my @oldenv;
318: {
319: my $fh;
320: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
321: return 'error';
322: }
323: unless (flock($fh,LOCK_SH)) {
324: &logthis("<font color=blue>WARNING: ".
325: 'Could not obtain shared lock in delenv: '.$!);
326: $fh->close();
327: return 'error: '.$!;
328: }
329: @oldenv=<$fh>;
330: $fh->close();
331: }
332: {
333: my $fh;
334: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
335: return 'error';
336: }
337: unless (flock($fh,LOCK_EX)) {
338: &logthis("<font color=blue>WARNING: ".
339: 'Could not obtain exclusive lock in delenv: '.$!);
340: $fh->close();
341: return 'error: '.$!;
342: }
343: foreach (@oldenv) {
344: unless ($_=~/^$delthis/) { print $fh $_; }
345: }
346: $fh->close();
347: }
348: return 'ok';
349: }
350:
351: # ------------------------------ Find server with least workload from spare.tab
352:
353: sub spareserver {
354: my $tryserver;
355: my $spareserver='';
356: my $lowestserver=100;
357: foreach $tryserver (keys %spareid) {
358: my $answer=reply('load',$tryserver);
359: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
360: $spareserver="http://$hostname{$tryserver}";
361: $lowestserver=$answer;
362: }
363: }
364: return $spareserver;
365: }
366:
367: # --------------------------------------------- Try to change a user's password
368:
369: sub changepass {
370: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
371: $currentpass = &escape($currentpass);
372: $newpass = &escape($newpass);
373: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
374: $server);
375: if (! $answer) {
376: &logthis("No reply on password change request to $server ".
377: "by $uname in domain $udom.");
378: } elsif ($answer =~ "^ok") {
379: &logthis("$uname in $udom successfully changed their password ".
380: "on $server.");
381: } elsif ($answer =~ "^pwchange_failure") {
382: &logthis("$uname in $udom was unable to change their password ".
383: "on $server. The action was blocked by either lcpasswd ".
384: "or pwchange");
385: } elsif ($answer =~ "^non_authorized") {
386: &logthis("$uname in $udom did not get their password correct when ".
387: "attempting to change it on $server.");
388: } elsif ($answer =~ "^auth_mode_error") {
389: &logthis("$uname in $udom attempted to change their password despite ".
390: "not being locally or internally authenticated on $server.");
391: } elsif ($answer =~ "^unknown_user") {
392: &logthis("$uname in $udom attempted to change their password ".
393: "on $server but were unable to because $server is not ".
394: "their home server.");
395: } elsif ($answer =~ "^refused") {
396: &logthis("$server refused to change $uname in $udom password because ".
397: "it was sent an unencrypted request to change the password.");
398: }
399: return $answer;
400: }
401:
402: # ----------------------- Try to determine user's current authentication scheme
403:
404: sub queryauthenticate {
405: my ($uname,$udom)=@_;
406: if (($perlvar{'lonRole'} eq 'library') &&
407: ($udom eq $perlvar{'lonDefDomain'})) {
408: my $answer=reply("encrypt:currentauth:$udom:$uname",
409: $perlvar{'lonHostID'});
410: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
411: if (length($answer)) {
412: return $answer;
413: }
414: else {
415: &logthis("User $uname at $udom lacks an authentication mechanism");
416: return 'no_host';
417: }
418: }
419: }
420:
421: my $tryserver;
422: foreach $tryserver (keys %libserv) {
423: if ($hostdom{$tryserver} eq $udom) {
424: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
425: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
426: if (length($answer)) {
427: return $answer;
428: }
429: else {
430: &logthis("User $uname at $udom lacks an authentication mechanism");
431: return 'no_host';
432: }
433: }
434: }
435: }
436: &logthis("User $uname at $udom lacks an authentication mechanism");
437: return 'no_host';
438: }
439:
440: # --------- Try to authenticate user from domain's lib servers (first this one)
441:
442: sub authenticate {
443: my ($uname,$upass,$udom)=@_;
444: $upass=escape($upass);
445: $uname=~s/\W//g;
446: if (($perlvar{'lonRole'} eq 'library') &&
447: ($udom eq $perlvar{'lonDefDomain'})) {
448: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
449: if ($answer =~ /authorized/) {
450: if ($answer eq 'authorized') {
451: &logthis("User $uname at $udom authorized by local server");
452: return $perlvar{'lonHostID'};
453: }
454: if ($answer eq 'non_authorized') {
455: &logthis("User $uname at $udom rejected by local server");
456: return 'no_host';
457: }
458: }
459: }
460:
461: my $tryserver;
462: foreach $tryserver (keys %libserv) {
463: if ($hostdom{$tryserver} eq $udom) {
464: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
465: if ($answer =~ /authorized/) {
466: if ($answer eq 'authorized') {
467: &logthis("User $uname at $udom authorized by $tryserver");
468: return $tryserver;
469: }
470: if ($answer eq 'non_authorized') {
471: &logthis("User $uname at $udom rejected by $tryserver");
472: return 'no_host';
473: }
474: }
475: }
476: }
477: &logthis("User $uname at $udom could not be authenticated");
478: return 'no_host';
479: }
480:
481: # ---------------------- Find the homebase for a user from domain's lib servers
482:
483: sub homeserver {
484: my ($uname,$udom,$ignoreBadCache)=@_;
485: my $index="$uname:$udom";
486: if ($homecache{$index}) {
487: return "$homecache{$index}";
488: }
489: my $tryserver;
490: foreach $tryserver (keys %libserv) {
491: next if ($ignoreBadCache ne 'true' &&
492: exists($badServerCache{$tryserver}));
493: if ($hostdom{$tryserver} eq $udom) {
494: my $answer=reply("home:$udom:$uname",$tryserver);
495: if ($answer eq 'found') {
496: $homecache{$index}=$tryserver;
497: return $tryserver;
498: } elsif ($answer eq 'no_host') {
499: $badServerCache{$tryserver}=1;
500: }
501: }
502: }
503: return 'no_host';
504: }
505:
506: # ------------------------------------- Find the usernames behind a list of IDs
507:
508: sub idget {
509: my ($udom,@ids)=@_;
510: my %returnhash=();
511:
512: my $tryserver;
513: foreach $tryserver (keys %libserv) {
514: if ($hostdom{$tryserver} eq $udom) {
515: my $idlist=join('&',@ids);
516: $idlist=~tr/A-Z/a-z/;
517: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
518: my @answer=();
519: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
520: @answer=split(/\&/,$reply);
521: } ;
522: my $i;
523: for ($i=0;$i<=$#ids;$i++) {
524: if ($answer[$i]) {
525: $returnhash{$ids[$i]}=$answer[$i];
526: }
527: }
528: }
529: }
530: return %returnhash;
531: }
532:
533: # ------------------------------------- Find the IDs behind a list of usernames
534:
535: sub idrget {
536: my ($udom,@unames)=@_;
537: my %returnhash=();
538: foreach (@unames) {
539: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
540: }
541: return %returnhash;
542: }
543:
544: # ------------------------------- Store away a list of names and associated IDs
545:
546: sub idput {
547: my ($udom,%ids)=@_;
548: my %servers=();
549: foreach (keys %ids) {
550: my $uhom=&homeserver($_,$udom);
551: if ($uhom ne 'no_host') {
552: my $id=&escape($ids{$_});
553: $id=~tr/A-Z/a-z/;
554: my $unam=&escape($_);
555: if ($servers{$uhom}) {
556: $servers{$uhom}.='&'.$id.'='.$unam;
557: } else {
558: $servers{$uhom}=$id.'='.$unam;
559: }
560: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
561: }
562: }
563: foreach (keys %servers) {
564: &critical('idput:'.$udom.':'.$servers{$_},$_);
565: }
566: }
567:
568: # ------------------------------------- Find the section of student in a course
569:
570: sub usection {
571: my ($udom,$unam,$courseid)=@_;
572: $courseid=~s/\_/\//g;
573: $courseid=~s/^(\w)/\/$1/;
574: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
575: &homeserver($unam,$udom)))) {
576: my ($key,$value)=split(/\=/,$_);
577: $key=&unescape($key);
578: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
579: my $section=$1;
580: if ($key eq $courseid.'_st') { $section=''; }
581: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
582: my $now=time;
583: my $notactive=0;
584: if ($start) {
585: if ($now<$start) { $notactive=1; }
586: }
587: if ($end) {
588: if ($now>$end) { $notactive=1; }
589: }
590: unless ($notactive) { return $section; }
591: }
592: }
593: return '-1';
594: }
595:
596: # ------------------------------------- Read an entry from a user's environment
597:
598: sub userenvironment {
599: my ($udom,$unam,@what)=@_;
600: my %returnhash=();
601: my @answer=split(/\&/,
602: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
603: &homeserver($unam,$udom)));
604: my $i;
605: for ($i=0;$i<=$#what;$i++) {
606: $returnhash{$what[$i]}=&unescape($answer[$i]);
607: }
608: return %returnhash;
609: }
610:
611: # -------------------------------------------------------------------- New chat
612:
613: sub chatsend {
614: my ($newentry,$anon)=@_;
615: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
616: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
617: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
618: &reply('chatsend:'.$cdom.':'.$cnum.':'.
619: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
620: &escape($newentry)),$chome);
621: }
622:
623: # ----------------------------- Subscribe to a resource, return URL if possible
624:
625: sub subscribe {
626: my $fname=shift;
627: my $author=$fname;
628: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
629: my ($udom,$uname)=split(/\//,$author);
630: my $home=homeserver($uname,$udom);
631: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
632: return 'not_found';
633: }
634: my $answer=reply("sub:$fname",$home);
635: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
636: $answer.=' by '.$home;
637: }
638: return $answer;
639: }
640:
641: # -------------------------------------------------------------- Replicate file
642:
643: sub repcopy {
644: my $filename=shift;
645: $filename=~s/\/+/\//g;
646: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
647: my $transname="$filename.in.transfer";
648: if ((-e $filename) || (-e $transname)) { return OK; }
649: my $remoteurl=subscribe($filename);
650: if ($remoteurl =~ /^con_lost by/) {
651: &logthis("Subscribe returned $remoteurl: $filename");
652: return HTTP_SERVICE_UNAVAILABLE;
653: } elsif ($remoteurl eq 'not_found') {
654: &logthis("Subscribe returned not_found: $filename");
655: return HTTP_NOT_FOUND;
656: } elsif ($remoteurl =~ /^rejected by/) {
657: &logthis("Subscribe returned $remoteurl: $filename");
658: return FORBIDDEN;
659: } elsif ($remoteurl eq 'directory') {
660: return OK;
661: } else {
662: my @parts=split(/\//,$filename);
663: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
664: if ($path ne "$perlvar{'lonDocRoot'}/res") {
665: &logthis("Malconfiguration for replication: $filename");
666: return HTTP_BAD_REQUEST;
667: }
668: my $count;
669: for ($count=5;$count<$#parts;$count++) {
670: $path.="/$parts[$count]";
671: if ((-e $path)!=1) {
672: mkdir($path,0777);
673: }
674: }
675: my $ua=new LWP::UserAgent;
676: my $request=new HTTP::Request('GET',"$remoteurl");
677: my $response=$ua->request($request,$transname);
678: if ($response->is_error()) {
679: unlink($transname);
680: my $message=$response->status_line;
681: &logthis("<font color=blue>WARNING:"
682: ." LWP get: $message: $filename</font>");
683: return HTTP_SERVICE_UNAVAILABLE;
684: } else {
685: if ($remoteurl!~/\.meta$/) {
686: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
687: my $mresponse=$ua->request($mrequest,$filename.'.meta');
688: if ($mresponse->is_error()) {
689: unlink($filename.'.meta');
690: &logthis(
691: "<font color=yellow>INFO: No metadata: $filename</font>");
692: }
693: }
694: rename($transname,$filename);
695: return OK;
696: }
697: }
698: }
699:
700: # --------------------------------------------------------- Server Side Include
701:
702: sub ssi {
703:
704: my ($fn,%form)=@_;
705:
706: my $ua=new LWP::UserAgent;
707:
708: my $request;
709:
710: if (%form) {
711: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
712: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
713: } else {
714: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
715: }
716:
717: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
718: my $response=$ua->request($request);
719:
720: return $response->content;
721: }
722:
723: # ------- Add a token to a remote URI's query string to vouch for access rights
724:
725: sub tokenwrapper {
726: my $uri=shift;
727: $uri=~s/^http\:\/\/([^\/]+)//;
728: $uri=~s/^\///;
729: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
730: my $token=$1;
731: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
732: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
733: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
734: (($uri=~/\?/)?'&':'?').'token='.$token;
735: } else {
736: return '/adm/notfound.html';
737: }
738: }
739:
740: # --------------- Take an uploaded file and put it into the userfiles directory
741: # input: name of form element, coursedoc=1 means this is for the course
742: # output: url of file in userspace
743:
744: sub userfileupload {
745: my ($formname,$coursedoc)=@_;
746: my $fname=$ENV{'form.'.$formname.'.filename'};
747: $fname=~s/\\/\//g;
748: $fname=~s/^.*\/([^\/]+)$/$1/;
749: unless ($fname) { return 'error: no uploaded file'; }
750: chop($ENV{'form.'.$formname});
751: # Create the directory if not present
752: my $docuname='';
753: my $docudom='';
754: my $docuhome='';
755: if ($coursedoc) {
756: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
757: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
758: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
759: } else {
760: $docuname=$ENV{'user.name'};
761: $docudom=$ENV{'user.domain'};
762: $docuhome=$ENV{'user.home'};
763: }
764: return
765: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
766: }
767:
768: sub finishuserfileupload {
769: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
770: my $path=$docudom.'/'.$docuname.'/';
771: my $filepath=$perlvar{'lonDocRoot'};
772: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
773: my $count;
774: for ($count=4;$count<=$#parts;$count++) {
775: $filepath.="/$parts[$count]";
776: if ((-e $filepath)!=1) {
777: mkdir($filepath,0777);
778: }
779: }
780: # Save the file
781: {
782: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
783: print $fh $ENV{'form.'.$formname};
784: }
785: # Notify homeserver to grep it
786: #
787: if
788: (&reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome) eq 'ok')
789: {
790: #
791: # Return the URL to it
792: return '/uploaded/'.$path.$fname;
793: } else {
794: return '/adm/notfound.html';
795: }
796: }
797:
798: # ------------------------------------------------------------------------- Log
799:
800: sub log {
801: my ($dom,$nam,$hom,$what)=@_;
802: return critical("log:$dom:$nam:$what",$hom);
803: }
804:
805: # ------------------------------------------------------------------ Course Log
806:
807: sub flushcourselogs {
808: &logthis('Flushing course log buffers');
809: foreach (keys %courselogs) {
810: my $crsid=$_;
811: if (&reply('log:'.$coursedombuf{$crsid}.':'.
812: &escape($courselogs{$crsid}),
813: $coursehombuf{$crsid}) eq 'ok') {
814: delete $courselogs{$crsid};
815: } else {
816: &logthis('Failed to flush log buffer for '.$crsid);
817: if (length($courselogs{$crsid})>40000) {
818: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
819: " exceeded maximum size, deleting.</font>");
820: delete $courselogs{$crsid};
821: }
822: }
823: }
824: &logthis('Flushing access logs');
825: foreach (keys %accesshash) {
826: my $entry=$_;
827: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
828: my %temphash=($entry => $accesshash{$entry});
829: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
830: delete $accesshash{$entry};
831: }
832: }
833: $dumpcount++;
834: }
835:
836: sub courselog {
837: my $what=shift;
838: $what=time.':'.$what;
839: unless ($ENV{'request.course.id'}) { return ''; }
840: $coursedombuf{$ENV{'request.course.id'}}=
841: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
842: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
843: $coursehombuf{$ENV{'request.course.id'}}=
844: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
845: if (defined $courselogs{$ENV{'request.course.id'}}) {
846: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
847: } else {
848: $courselogs{$ENV{'request.course.id'}}.=$what;
849: }
850: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
851: &flushcourselogs();
852: }
853: }
854:
855: sub courseacclog {
856: my $fnsymb=shift;
857: unless ($ENV{'request.course.id'}) { return ''; }
858: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
859: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
860: $what.=':POST';
861: foreach (keys %ENV) {
862: if ($_=~/^form\.(.*)/) {
863: $what.=':'.$1.'='.$ENV{$_};
864: }
865: }
866: }
867: &courselog($what);
868: }
869:
870: sub countacc {
871: my $url=&declutter(shift);
872: unless ($ENV{'request.course.id'}) { return ''; }
873: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
874: my $key=$processmarker.'_'.$dumpcount.'___'.$url.'___count';
875: if (defined($accesshash{$key})) {
876: $accesshash{$key}++;
877: } else {
878: $accesshash{$key}=1;
879: }
880: }
881:
882: # ----------------------------------------------------------- Check out an item
883:
884: sub checkout {
885: my ($symb,$tuname,$tudom,$tcrsid)=@_;
886: my $now=time;
887: my $lonhost=$perlvar{'lonHostID'};
888: my $infostr=&escape(
889: 'CHECKOUTTOKEN&'.
890: $tuname.'&'.
891: $tudom.'&'.
892: $tcrsid.'&'.
893: $symb.'&'.
894: $now.'&'.$ENV{'REMOTE_ADDR'});
895: my $token=&reply('tmpput:'.$infostr,$lonhost);
896: if ($token=~/^error\:/) {
897: &logthis("<font color=blue>WARNING: ".
898: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
899: "</font>");
900: return '';
901: }
902:
903: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
904: $token=~tr/a-z/A-Z/;
905:
906: my %infohash=('resource.0.outtoken' => $token,
907: 'resource.0.checkouttime' => $now,
908: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
909:
910: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
911: return '';
912: } else {
913: &logthis("<font color=blue>WARNING: ".
914: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
915: "</font>");
916: }
917:
918: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
919: &escape('Checkout '.$infostr.' - '.
920: $token)) ne 'ok') {
921: return '';
922: } else {
923: &logthis("<font color=blue>WARNING: ".
924: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
925: "</font>");
926: }
927: return $token;
928: }
929:
930: # ------------------------------------------------------------ Check in an item
931:
932: sub checkin {
933: my $token=shift;
934: my $now=time;
935: my ($ta,$tb,$lonhost)=split(/\*/,$token);
936: $lonhost=~tr/A-Z/a-z/;
937: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
938: $dtoken=~s/\W/\_/g;
939: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
940: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
941:
942: unless (($tuname) && ($tudom)) {
943: &logthis('Check in '.$token.' ('.$dtoken.') failed');
944: return '';
945: }
946:
947: unless (&allowed('mgr',$tcrsid)) {
948: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
949: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
950: return '';
951: }
952:
953: my %infohash=('resource.0.intoken' => $token,
954: 'resource.0.checkintime' => $now,
955: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
956:
957: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
958: return '';
959: }
960:
961: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
962: &escape('Checkin - '.$token)) ne 'ok') {
963: return '';
964: }
965:
966: return ($symb,$tuname,$tudom,$tcrsid);
967: }
968:
969: # --------------------------------------------- Set Expire Date for Spreadsheet
970:
971: sub expirespread {
972: my ($uname,$udom,$stype,$usymb)=@_;
973: my $cid=$ENV{'request.course.id'};
974: if ($cid) {
975: my $now=time;
976: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
977: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
978: $ENV{'course.'.$cid.'.num'}.
979: ':nohist_expirationdates:'.
980: &escape($key).'='.$now,
981: $ENV{'course.'.$cid.'.home'})
982: }
983: return 'ok';
984: }
985:
986: # ----------------------------------------------------- Devalidate Spreadsheets
987:
988: sub devalidate {
989: my $symb=shift;
990: my $cid=$ENV{'request.course.id'};
991: if ($cid) {
992: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
993: my $status=
994: &del('nohist_calculatedsheet',
995: [$key.'studentcalc'],
996: $ENV{'course.'.$cid.'.domain'},
997: $ENV{'course.'.$cid.'.num'})
998: .' '.
999: &del('nohist_calculatedsheets_'.$cid,
1000: [$key.'assesscalc:'.$symb]);
1001: unless ($status eq 'ok ok') {
1002: &logthis('Could not devalidate spreadsheet '.
1003: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
1004: $symb.': '.$status);
1005: }
1006: }
1007: }
1008:
1009: sub get_scalar {
1010: my ($string,$end) = @_;
1011: my $value;
1012: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1013: $value = $1;
1014: } elsif ($$string =~ s/^([^&]*?)&//) {
1015: $value = $1;
1016: }
1017: return &unescape($value);
1018: }
1019:
1020: sub array2str {
1021: my (@array) = @_;
1022: my $result=&arrayref2str(\@array);
1023: $result=~s/^__ARRAY_REF__//;
1024: $result=~s/__END_ARRAY_REF__$//;
1025: return $result;
1026: }
1027:
1028: sub arrayref2str {
1029: my ($arrayref) = @_;
1030: my $result='__ARRAY_REF__';
1031: foreach my $elem (@$arrayref) {
1032: if(ref($elem) eq 'ARRAY') {
1033: $result.=&arrayref2str($elem).'&';
1034: } elsif(ref($elem) eq 'HASH') {
1035: $result.=&hashref2str($elem).'&';
1036: } elsif(ref($elem)) {
1037: #print("Got a ref of ".(ref($elem))." skipping.");
1038: } else {
1039: $result.=&escape($elem).'&';
1040: }
1041: }
1042: $result=~s/\&$//;
1043: $result .= '__END_ARRAY_REF__';
1044: return $result;
1045: }
1046:
1047: sub hash2str {
1048: my (%hash) = @_;
1049: my $result=&hashref2str(\%hash);
1050: $result=~s/^__HASH_REF__//;
1051: $result=~s/__END_HASH_REF__$//;
1052: return $result;
1053: }
1054:
1055: sub hashref2str {
1056: my ($hashref)=@_;
1057: my $result='__HASH_REF__';
1058: foreach (keys(%$hashref)) {
1059: if (ref($_) eq 'ARRAY') {
1060: $result.=&arrayref2str($_).'=';
1061: } elsif (ref($_) eq 'HASH') {
1062: $result.=&hashref2str($_).'=';
1063: } elsif (ref($_)) {
1064: $result.='=';
1065: #print("Got a ref of ".(ref($_))." skipping.");
1066: } else {
1067: if ($_) {$result.=&escape($_).'=';} else { last; }
1068: }
1069:
1070: if(ref($hashref->{$_}) eq 'ARRAY') {
1071: $result.=&arrayref2str($hashref->{$_}).'&';
1072: } elsif(ref($hashref->{$_}) eq 'HASH') {
1073: $result.=&hashref2str($hashref->{$_}).'&';
1074: } elsif(ref($hashref->{$_})) {
1075: $result.='&';
1076: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1077: } else {
1078: $result.=&escape($hashref->{$_}).'&';
1079: }
1080: }
1081: $result=~s/\&$//;
1082: $result .= '__END_HASH_REF__';
1083: return $result;
1084: }
1085:
1086: sub str2hash {
1087: my ($string)=@_;
1088: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1089: return %$hash;
1090: }
1091:
1092: sub str2hashref {
1093: my ($string) = @_;
1094:
1095: my %hash;
1096:
1097: if($string !~ /^__HASH_REF__/) {
1098: if (! ($string eq '' || !defined($string))) {
1099: $hash{'error'}='Not hash reference';
1100: }
1101: return (\%hash, $string);
1102: }
1103:
1104: $string =~ s/^__HASH_REF__//;
1105:
1106: while($string !~ /^__END_HASH_REF__/) {
1107: #key
1108: my $key='';
1109: if($string =~ /^__HASH_REF__/) {
1110: ($key, $string)=&str2hashref($string);
1111: if(defined($key->{'error'})) {
1112: $hash{'error'}='Bad data';
1113: return (\%hash, $string);
1114: }
1115: } elsif($string =~ /^__ARRAY_REF__/) {
1116: ($key, $string)=&str2arrayref($string);
1117: if($key->[0] eq 'Array reference error') {
1118: $hash{'error'}='Bad data';
1119: return (\%hash, $string);
1120: }
1121: } else {
1122: $string =~ s/^(.*?)=//;
1123: $key=&unescape($1);
1124: }
1125: $string =~ s/^=//;
1126:
1127: #value
1128: my $value='';
1129: if($string =~ /^__HASH_REF__/) {
1130: ($value, $string)=&str2hashref($string);
1131: if(defined($value->{'error'})) {
1132: $hash{'error'}='Bad data';
1133: return (\%hash, $string);
1134: }
1135: } elsif($string =~ /^__ARRAY_REF__/) {
1136: ($value, $string)=&str2arrayref($string);
1137: if($value->[0] eq 'Array reference error') {
1138: $hash{'error'}='Bad data';
1139: return (\%hash, $string);
1140: }
1141: } else {
1142: $value=&get_scalar(\$string,'__END_HASH_REF__');
1143: }
1144: $string =~ s/^&//;
1145:
1146: $hash{$key}=$value;
1147: }
1148:
1149: $string =~ s/^__END_HASH_REF__//;
1150:
1151: return (\%hash, $string);
1152: }
1153:
1154: sub str2array {
1155: my ($string)=@_;
1156: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1157: return @$array;
1158: }
1159:
1160: sub str2arrayref {
1161: my ($string) = @_;
1162: my @array;
1163:
1164: if($string !~ /^__ARRAY_REF__/) {
1165: if (! ($string eq '' || !defined($string))) {
1166: $array[0]='Array reference error';
1167: }
1168: return (\@array, $string);
1169: }
1170:
1171: $string =~ s/^__ARRAY_REF__//;
1172:
1173: while($string !~ /^__END_ARRAY_REF__/) {
1174: my $value='';
1175: if($string =~ /^__HASH_REF__/) {
1176: ($value, $string)=&str2hashref($string);
1177: if(defined($value->{'error'})) {
1178: $array[0] ='Array reference error';
1179: return (\@array, $string);
1180: }
1181: } elsif($string =~ /^__ARRAY_REF__/) {
1182: ($value, $string)=&str2arrayref($string);
1183: if($value->[0] eq 'Array reference error') {
1184: $array[0] ='Array reference error';
1185: return (\@array, $string);
1186: }
1187: } else {
1188: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1189: }
1190: $string =~ s/^&//;
1191:
1192: push(@array, $value);
1193: }
1194:
1195: $string =~ s/^__END_ARRAY_REF__//;
1196:
1197: return (\@array, $string);
1198: }
1199:
1200: # -------------------------------------------------------------------Temp Store
1201:
1202: sub tmpreset {
1203: my ($symb,$namespace,$domain,$stuname) = @_;
1204: if (!$symb) {
1205: $symb=&symbread();
1206: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1207: }
1208: $symb=escape($symb);
1209:
1210: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1211: $namespace=~s/\//\_/g;
1212: $namespace=~s/\W//g;
1213:
1214: #FIXME needs to do something for /pub resources
1215: if (!$domain) { $domain=$ENV{'user.domain'}; }
1216: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1217: my $path=$perlvar{'lonDaemons'}.'/tmp';
1218: my %hash;
1219: if (tie(%hash,'GDBM_File',
1220: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1221: &GDBM_WRCREAT(),0640)) {
1222: foreach my $key (keys %hash) {
1223: if ($key=~ /:$symb/) {
1224: delete($hash{$key});
1225: }
1226: }
1227: }
1228: }
1229:
1230: sub tmpstore {
1231: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1232:
1233: if (!$symb) {
1234: $symb=&symbread();
1235: if (!$symb) { $symb= $ENV{'request.url'}; }
1236: }
1237: $symb=escape($symb);
1238:
1239: if (!$namespace) {
1240: # I don't think we would ever want to store this for a course.
1241: # it seems this will only be used if we don't have a course.
1242: #$namespace=$ENV{'request.course.id'};
1243: #if (!$namespace) {
1244: $namespace=$ENV{'request.state'};
1245: #}
1246: }
1247: $namespace=~s/\//\_/g;
1248: $namespace=~s/\W//g;
1249: #FIXME needs to do something for /pub resources
1250: if (!$domain) { $domain=$ENV{'user.domain'}; }
1251: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1252: my $now=time;
1253: my %hash;
1254: my $path=$perlvar{'lonDaemons'}.'/tmp';
1255: if (tie(%hash,'GDBM_File',
1256: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1257: &GDBM_WRCREAT(),0640)) {
1258: $hash{"version:$symb"}++;
1259: my $version=$hash{"version:$symb"};
1260: my $allkeys='';
1261: foreach my $key (keys(%$storehash)) {
1262: $allkeys.=$key.':';
1263: $hash{"$version:$symb:$key"}=$$storehash{$key};
1264: }
1265: $hash{"$version:$symb:timestamp"}=$now;
1266: $allkeys.='timestamp';
1267: $hash{"$version:keys:$symb"}=$allkeys;
1268: if (untie(%hash)) {
1269: return 'ok';
1270: } else {
1271: return "error:$!";
1272: }
1273: } else {
1274: return "error:$!";
1275: }
1276: }
1277:
1278: # -----------------------------------------------------------------Temp Restore
1279:
1280: sub tmprestore {
1281: my ($symb,$namespace,$domain,$stuname) = @_;
1282:
1283: if (!$symb) {
1284: $symb=&symbread();
1285: if (!$symb) { $symb= $ENV{'request.url'}; }
1286: }
1287: $symb=escape($symb);
1288:
1289: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1290: #FIXME needs to do something for /pub resources
1291: if (!$domain) { $domain=$ENV{'user.domain'}; }
1292: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1293:
1294: my %returnhash;
1295: $namespace=~s/\//\_/g;
1296: $namespace=~s/\W//g;
1297: my %hash;
1298: my $path=$perlvar{'lonDaemons'}.'/tmp';
1299: if (tie(%hash,'GDBM_File',
1300: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1301: &GDBM_READER(),0640)) {
1302: my $version=$hash{"version:$symb"};
1303: $returnhash{'version'}=$version;
1304: my $scope;
1305: for ($scope=1;$scope<=$version;$scope++) {
1306: my $vkeys=$hash{"$scope:keys:$symb"};
1307: my @keys=split(/:/,$vkeys);
1308: my $key;
1309: $returnhash{"$scope:keys"}=$vkeys;
1310: foreach $key (@keys) {
1311: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1312: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1313: }
1314: }
1315: if (!(untie(%hash))) {
1316: return "error:$!";
1317: }
1318: } else {
1319: return "error:$!";
1320: }
1321: return %returnhash;
1322: }
1323:
1324: # ----------------------------------------------------------------------- Store
1325:
1326: sub store {
1327: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1328: my $home='';
1329:
1330: if ($stuname) { $home=&homeserver($stuname,$domain); }
1331:
1332: $symb=&symbclean($symb);
1333: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1334:
1335: &devalidate($symb);
1336:
1337: $symb=escape($symb);
1338: if (!$namespace) {
1339: unless ($namespace=$ENV{'request.course.id'}) {
1340: return '';
1341: }
1342: }
1343: if (!$domain) { $domain=$ENV{'user.domain'}; }
1344: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1345: if (!$home) { $home=$ENV{'user.home'}; }
1346: my $namevalue='';
1347: foreach (keys %$storehash) {
1348: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1349: }
1350: $namevalue=~s/\&$//;
1351: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1352: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1353: }
1354:
1355: # -------------------------------------------------------------- Critical Store
1356:
1357: sub cstore {
1358: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1359: my $home='';
1360:
1361: if ($stuname) { $home=&homeserver($stuname,$domain); }
1362:
1363: $symb=&symbclean($symb);
1364: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1365:
1366: &devalidate($symb);
1367:
1368: $symb=escape($symb);
1369: if (!$namespace) {
1370: unless ($namespace=$ENV{'request.course.id'}) {
1371: return '';
1372: }
1373: }
1374: if (!$domain) { $domain=$ENV{'user.domain'}; }
1375: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1376: if (!$home) { $home=$ENV{'user.home'}; }
1377:
1378: my $namevalue='';
1379: foreach (keys %$storehash) {
1380: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1381: }
1382: $namevalue=~s/\&$//;
1383: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1384: return critical
1385: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1386: }
1387:
1388: # --------------------------------------------------------------------- Restore
1389:
1390: sub restore {
1391: my ($symb,$namespace,$domain,$stuname) = @_;
1392: my $home='';
1393:
1394: if ($stuname) { $home=&homeserver($stuname,$domain); }
1395:
1396: if (!$symb) {
1397: unless ($symb=escape(&symbread())) { return ''; }
1398: } else {
1399: $symb=&escape(&symbclean($symb));
1400: }
1401: if (!$namespace) {
1402: unless ($namespace=$ENV{'request.course.id'}) {
1403: return '';
1404: }
1405: }
1406: if (!$domain) { $domain=$ENV{'user.domain'}; }
1407: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1408: if (!$home) { $home=$ENV{'user.home'}; }
1409: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1410:
1411: my %returnhash=();
1412: foreach (split(/\&/,$answer)) {
1413: my ($name,$value)=split(/\=/,$_);
1414: $returnhash{&unescape($name)}=&unescape($value);
1415: }
1416: my $version;
1417: for ($version=1;$version<=$returnhash{'version'};$version++) {
1418: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1419: $returnhash{$_}=$returnhash{$version.':'.$_};
1420: }
1421: }
1422: return %returnhash;
1423: }
1424:
1425: # ---------------------------------------------------------- Course Description
1426:
1427: sub coursedescription {
1428: my $courseid=shift;
1429: $courseid=~s/^\///;
1430: $courseid=~s/\_/\//g;
1431: my ($cdomain,$cnum)=split(/\//,$courseid);
1432: my $chome=&homeserver($cnum,$cdomain);
1433: if ($chome ne 'no_host') {
1434: my %returnhash=&dump('environment',$cdomain,$cnum);
1435: if (!exists($returnhash{'con_lost'})) {
1436: my $normalid=$cdomain.'_'.$cnum;
1437: my %envhash=();
1438: $returnhash{'home'}= $chome;
1439: $returnhash{'domain'} = $cdomain;
1440: $returnhash{'num'} = $cnum;
1441: while (my ($name,$value) = each %returnhash) {
1442: $envhash{'course.'.$normalid.'.'.$name}=$value;
1443: }
1444: $returnhash{'url'}=&clutter($returnhash{'url'});
1445: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1446: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1447: $envhash{'course.'.$normalid.'.last_cache'}=time;
1448: $envhash{'course.'.$normalid.'.home'}=$chome;
1449: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1450: $envhash{'course.'.$normalid.'.num'}=$cnum;
1451: &appenv(%envhash);
1452: return %returnhash;
1453: }
1454: }
1455: return ();
1456: }
1457:
1458: # -------------------------------------------------------- Get user privileges
1459:
1460: sub rolesinit {
1461: my ($domain,$username,$authhost)=@_;
1462: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1463: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1464: my %allroles=();
1465: my %thesepriv=();
1466: my $now=time;
1467: my $userroles="user.login.time=$now\n";
1468: my $thesestr;
1469:
1470: if ($rolesdump ne '') {
1471: foreach (split(/&/,$rolesdump)) {
1472: if ($_!~/^rolesdef\&/) {
1473: my ($area,$role)=split(/=/,$_);
1474: $area=~s/\_\w\w$//;
1475: my ($trole,$tend,$tstart)=split(/_/,$role);
1476: $userroles.='user.role.'.$trole.'.'.$area.'='.
1477: $tstart.'.'.$tend."\n";
1478: if ($tend!=0) {
1479: if ($tend<$now) {
1480: $trole='';
1481: }
1482: }
1483: if ($tstart!=0) {
1484: if ($tstart>$now) {
1485: $trole='';
1486: }
1487: }
1488: if (($area ne '') && ($trole ne '')) {
1489: my $spec=$trole.'.'.$area;
1490: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1491: if ($trole =~ /^cr\//) {
1492: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1493: my $homsvr=homeserver($rauthor,$rdomain);
1494: if ($hostname{$homsvr} ne '') {
1495: my $roledef=
1496: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1497: $homsvr);
1498: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1499: my ($syspriv,$dompriv,$coursepriv)=
1500: split(/\_/,unescape($roledef));
1501: $allroles{'cm./'}.=':'.$syspriv;
1502: $allroles{$spec.'./'}.=':'.$syspriv;
1503: if ($tdomain ne '') {
1504: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1505: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1506: if ($trest ne '') {
1507: $allroles{'cm.'.$area}.=':'.$coursepriv;
1508: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1509: }
1510: }
1511: }
1512: }
1513: } else {
1514: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1515: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1516: if ($tdomain ne '') {
1517: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1518: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1519: if ($trest ne '') {
1520: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1521: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1522: }
1523: }
1524: }
1525: }
1526: }
1527: }
1528: my $adv=0;
1529: my $author=0;
1530: foreach (keys %allroles) {
1531: %thesepriv=();
1532: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1533: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1534: foreach (split(/:/,$allroles{$_})) {
1535: if ($_ ne '') {
1536: my ($privilege,$restrictions)=split(/&/,$_);
1537: if ($restrictions eq '') {
1538: $thesepriv{$privilege}='F';
1539: } else {
1540: if ($thesepriv{$privilege} ne 'F') {
1541: $thesepriv{$privilege}.=$restrictions;
1542: }
1543: }
1544: }
1545: }
1546: $thesestr='';
1547: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1548: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1549: }
1550: $userroles.='user.adv='.$adv."\n".
1551: 'user.author='.$author."\n";
1552: $ENV{'user.adv'}=$adv;
1553: }
1554: return $userroles;
1555: }
1556:
1557: # --------------------------------------------------------------- get interface
1558:
1559: sub get {
1560: my ($namespace,$storearr,$udomain,$uname)=@_;
1561: my $items='';
1562: foreach (@$storearr) {
1563: $items.=escape($_).'&';
1564: }
1565: $items=~s/\&$//;
1566: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1567: if (!$uname) { $uname=$ENV{'user.name'}; }
1568: my $uhome=&homeserver($uname,$udomain);
1569:
1570: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1571: my @pairs=split(/\&/,$rep);
1572: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1573: return @pairs;
1574: }
1575: my %returnhash=();
1576: my $i=0;
1577: foreach (@$storearr) {
1578: $returnhash{$_}=unescape($pairs[$i]);
1579: $i++;
1580: }
1581: return %returnhash;
1582: }
1583:
1584: # --------------------------------------------------------------- del interface
1585:
1586: sub del {
1587: my ($namespace,$storearr,$udomain,$uname)=@_;
1588: my $items='';
1589: foreach (@$storearr) {
1590: $items.=escape($_).'&';
1591: }
1592: $items=~s/\&$//;
1593: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1594: if (!$uname) { $uname=$ENV{'user.name'}; }
1595: my $uhome=&homeserver($uname,$udomain);
1596:
1597: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1598: }
1599:
1600: # -------------------------------------------------------------- dump interface
1601:
1602: sub dump {
1603: my ($namespace,$udomain,$uname,$regexp)=@_;
1604: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1605: if (!$uname) { $uname=$ENV{'user.name'}; }
1606: my $uhome=&homeserver($uname,$udomain);
1607: if ($regexp) {
1608: $regexp=&escape($regexp);
1609: } else {
1610: $regexp='.';
1611: }
1612: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1613: my @pairs=split(/\&/,$rep);
1614: my %returnhash=();
1615: foreach (@pairs) {
1616: my ($key,$value)=split(/=/,$_);
1617: $returnhash{unescape($key)}=unescape($value);
1618: }
1619: return %returnhash;
1620: }
1621:
1622: # --------------------------------------------------------------- put interface
1623:
1624: sub put {
1625: my ($namespace,$storehash,$udomain,$uname)=@_;
1626: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1627: if (!$uname) { $uname=$ENV{'user.name'}; }
1628: my $uhome=&homeserver($uname,$udomain);
1629: my $items='';
1630: foreach (keys %$storehash) {
1631: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1632: }
1633: $items=~s/\&$//;
1634: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1635: }
1636:
1637: # ------------------------------------------------------ critical put interface
1638:
1639: sub cput {
1640: my ($namespace,$storehash,$udomain,$uname)=@_;
1641: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1642: if (!$uname) { $uname=$ENV{'user.name'}; }
1643: my $uhome=&homeserver($uname,$udomain);
1644: my $items='';
1645: foreach (keys %$storehash) {
1646: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1647: }
1648: $items=~s/\&$//;
1649: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1650: }
1651:
1652: # -------------------------------------------------------------- eget interface
1653:
1654: sub eget {
1655: my ($namespace,$storearr,$udomain,$uname)=@_;
1656: my $items='';
1657: foreach (@$storearr) {
1658: $items.=escape($_).'&';
1659: }
1660: $items=~s/\&$//;
1661: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1662: if (!$uname) { $uname=$ENV{'user.name'}; }
1663: my $uhome=&homeserver($uname,$udomain);
1664: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1665: my @pairs=split(/\&/,$rep);
1666: my %returnhash=();
1667: my $i=0;
1668: foreach (@$storearr) {
1669: $returnhash{$_}=unescape($pairs[$i]);
1670: $i++;
1671: }
1672: return %returnhash;
1673: }
1674:
1675: # ------------------------------------------------- Check for a user privilege
1676:
1677: sub allowed {
1678: my ($priv,$uri)=@_;
1679:
1680: my $orguri=$uri;
1681: $uri=&declutter($uri);
1682:
1683: # Free bre access to adm and meta resources
1684:
1685: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1686: return 'F';
1687: }
1688:
1689: # Free bre to public access
1690:
1691: if ($priv eq 'bre') {
1692: my $copyright=&metadata($uri,'copyright');
1693: if ($copyright eq 'public') { return 'F'; }
1694: if ($copyright eq 'priv') {
1695: $uri=~/([^\/]+)\/([^\/]+)\//;
1696: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
1697: return '';
1698: }
1699: }
1700: if ($copyright eq 'domain') {
1701: $uri=~/([^\/]+)\/([^\/]+)\//;
1702: unless (($ENV{'user.domain'} eq $1) ||
1703: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
1704: return '';
1705: }
1706: }
1707: if ($ENV{'request.role'}=~ /li\.\//) {
1708: # Library role, so allow browsing of resources in this domain.
1709: return 'F';
1710: }
1711: }
1712: # Domain coordinator is trying to create a course
1713: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
1714: # uri is the requested domain in this case.
1715: # comparison to 'request.role.domain' shows if the user has selected
1716: # a role of dc for the domain in question.
1717: return 'F' if ($uri eq $ENV{'request.role.domain'});
1718: }
1719:
1720: my $thisallowed='';
1721: my $statecond=0;
1722: my $courseprivid='';
1723:
1724: # Course
1725:
1726: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1727: $thisallowed.=$1;
1728: }
1729:
1730: # Domain
1731:
1732: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1733: =~/$priv\&([^\:]*)/) {
1734: $thisallowed.=$1;
1735: }
1736:
1737: # Course: uri itself is a course
1738: my $courseuri=$uri;
1739: $courseuri=~s/\_(\d)/\/$1/;
1740: $courseuri=~s/^([^\/])/\/$1/;
1741:
1742: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1743: =~/$priv\&([^\:]*)/) {
1744: $thisallowed.=$1;
1745: }
1746:
1747: # Full access at system, domain or course-wide level? Exit.
1748:
1749: if ($thisallowed=~/F/) {
1750: return 'F';
1751: }
1752:
1753: # If this is generating or modifying users, exit with special codes
1754:
1755: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1756: return $thisallowed;
1757: }
1758: #
1759: # Gathered so far: system, domain and course wide privileges
1760: #
1761: # Course: See if uri or referer is an individual resource that is part of
1762: # the course
1763:
1764: if ($ENV{'request.course.id'}) {
1765:
1766: $courseprivid=$ENV{'request.course.id'};
1767: if ($ENV{'request.course.sec'}) {
1768: $courseprivid.='/'.$ENV{'request.course.sec'};
1769: }
1770: $courseprivid=~s/\_/\//;
1771: my $checkreferer=1;
1772: my ($match,$cond)=&is_on_map($uri);
1773: if ($match) {
1774: $statecond=$cond;
1775: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1776: =~/$priv\&([^\:]*)/) {
1777: $thisallowed.=$1;
1778: $checkreferer=0;
1779: }
1780: }
1781:
1782: if ($checkreferer) {
1783: my $refuri=$ENV{'httpref.'.$orguri};
1784: unless ($refuri) {
1785: foreach (keys %ENV) {
1786: if ($_=~/^httpref\..*\*/) {
1787: my $pattern=$_;
1788: $pattern=~s/^httpref\.\/res\///;
1789: $pattern=~s/\*/\[\^\/\]\+/g;
1790: $pattern=~s/\//\\\//g;
1791: if ($orguri=~/$pattern/) {
1792: $refuri=$ENV{$_};
1793: }
1794: }
1795: }
1796: }
1797:
1798: if ($refuri) {
1799: $refuri=&declutter($refuri);
1800: my ($match,$cond)=&is_on_map($refuri);
1801: if ($match) {
1802: my $refstatecond=$cond;
1803: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1804: =~/$priv\&([^\:]*)/) {
1805: $thisallowed.=$1;
1806: $uri=$refuri;
1807: $statecond=$refstatecond;
1808: }
1809: }
1810: }
1811: }
1812: }
1813:
1814: #
1815: # Gathered now: all privileges that could apply, and condition number
1816: #
1817: #
1818: # Full or no access?
1819: #
1820:
1821: if ($thisallowed=~/F/) {
1822: return 'F';
1823: }
1824:
1825: unless ($thisallowed) {
1826: return '';
1827: }
1828:
1829: # Restrictions exist, deal with them
1830: #
1831: # C:according to course preferences
1832: # R:according to resource settings
1833: # L:unless locked
1834: # X:according to user session state
1835: #
1836:
1837: # Possibly locked functionality, check all courses
1838: # Locks might take effect only after 10 minutes cache expiration for other
1839: # courses, and 2 minutes for current course
1840:
1841: my $envkey;
1842: if ($thisallowed=~/L/) {
1843: foreach $envkey (keys %ENV) {
1844: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1845: my $courseid=$2;
1846: my $roleid=$1.'.'.$2;
1847: $courseid=~s/^\///;
1848: my $expiretime=600;
1849: if ($ENV{'request.role'} eq $roleid) {
1850: $expiretime=120;
1851: }
1852: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1853: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1854: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1855: &coursedescription($courseid);
1856: }
1857: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1858: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1859: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1860: &log($ENV{'user.domain'},$ENV{'user.name'},
1861: $ENV{'user.home'},
1862: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1863: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1864: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1865: return '';
1866: }
1867: }
1868: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1869: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1870: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1871: &log($ENV{'user.domain'},$ENV{'user.name'},
1872: $ENV{'user.home'},
1873: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1874: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1875: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1876: return '';
1877: }
1878: }
1879: }
1880: }
1881: }
1882:
1883: #
1884: # Rest of the restrictions depend on selected course
1885: #
1886:
1887: unless ($ENV{'request.course.id'}) {
1888: return '1';
1889: }
1890:
1891: #
1892: # Now user is definitely in a course
1893: #
1894:
1895:
1896: # Course preferences
1897:
1898: if ($thisallowed=~/C/) {
1899: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1900: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
1901: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1902: =~/$rolecode/) {
1903: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1904: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1905: $ENV{'request.course.id'});
1906: return '';
1907: }
1908:
1909: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
1910: =~/$unamedom/) {
1911: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1912: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
1913: $ENV{'request.course.id'});
1914: return '';
1915: }
1916: }
1917:
1918: # Resource preferences
1919:
1920: if ($thisallowed=~/R/) {
1921: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1922: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1923: if (-e $filename) {
1924: my @content;
1925: {
1926: my $fh=Apache::File->new($filename);
1927: @content=<$fh>;
1928: }
1929: if (join('',@content)=~
1930: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1931: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1932: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1933: return '';
1934:
1935: }
1936: }
1937: }
1938:
1939: # Restricted by state or randomout?
1940:
1941: if ($thisallowed=~/X/) {
1942: if ($ENV{'acc.randomout'}) {
1943: my $symb=&symbread($uri,1);
1944: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
1945: return '';
1946: }
1947: }
1948: if (&condval($statecond)) {
1949: return '2';
1950: } else {
1951: return '';
1952: }
1953: }
1954:
1955: return 'F';
1956: }
1957:
1958: # --------------------------------------------------- Is a resource on the map?
1959:
1960: sub is_on_map {
1961: my $uri=&declutter(shift);
1962: my @uriparts=split(/\//,$uri);
1963: my $filename=$uriparts[$#uriparts];
1964: my $pathname=$uri;
1965: $pathname=~s/\/$filename$//;
1966: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1967: /\&$filename\:([\d\|]+)\&/);
1968: if ($match) {
1969: return (1,$1);
1970: } else {
1971: return (0,0);
1972: }
1973: }
1974:
1975: # ----------------------------------------------------------------- Define Role
1976:
1977: sub definerole {
1978: if (allowed('mcr','/')) {
1979: my ($rolename,$sysrole,$domrole,$courole)=@_;
1980: foreach (split('/',$sysrole)) {
1981: my ($crole,$cqual)=split(/\&/,$_);
1982: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1983: if ($pr{'cr:s'}=~/$crole\&/) {
1984: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1985: return "refused:s:$crole&$cqual";
1986: }
1987: }
1988: }
1989: foreach (split('/',$domrole)) {
1990: my ($crole,$cqual)=split(/\&/,$_);
1991: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1992: if ($pr{'cr:d'}=~/$crole\&/) {
1993: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1994: return "refused:d:$crole&$cqual";
1995: }
1996: }
1997: }
1998: foreach (split('/',$courole)) {
1999: my ($crole,$cqual)=split(/\&/,$_);
2000: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2001: if ($pr{'cr:c'}=~/$crole\&/) {
2002: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2003: return "refused:c:$crole&$cqual";
2004: }
2005: }
2006: }
2007: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2008: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2009: "rolesdef_$rolename=".
2010: escape($sysrole.'_'.$domrole.'_'.$courole);
2011: return reply($command,$ENV{'user.home'});
2012: } else {
2013: return 'refused';
2014: }
2015: }
2016:
2017: # ---------------- Make a metadata query against the network of library servers
2018:
2019: sub metadata_query {
2020: my ($query,$custom,$customshow,$server_array)=@_;
2021: my %rhash;
2022: my @server_list = (defined($server_array) ? @$server_array
2023: : keys(%libserv) );
2024: for my $server (@server_list) {
2025: unless ($custom or $customshow) {
2026: my $reply=&reply("querysend:".&escape($query),$server);
2027: $rhash{$server}=$reply;
2028: }
2029: else {
2030: my $reply=&reply("querysend:".&escape($query).':'.
2031: &escape($custom).':'.&escape($customshow),
2032: $server);
2033: $rhash{$server}=$reply;
2034: }
2035: }
2036: return \%rhash;
2037: }
2038:
2039: # ----------------------------------------- Send log queries and wait for reply
2040:
2041: sub log_query {
2042: my ($uname,$udom,$query,%filters)=@_;
2043: my $uhome=&homeserver($uname,$udom);
2044: if ($uhome eq 'no_host') { return 'error: no_host'; }
2045: my $uhost=$hostname{$uhome};
2046: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2047: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2048: $uhome);
2049: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2050: return get_query_reply($queryid);
2051: }
2052:
2053: sub get_query_reply {
2054: my $queryid=shift;
2055: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2056: my $reply='';
2057: for (1..100) {
2058: sleep 2;
2059: if (-e $replyfile.'.end') {
2060: if (my $fh=Apache::File->new($replyfile)) {
2061: $reply.=<$fh>;
2062: $fh->close;
2063: } else { return 'error: reply_file_error'; }
2064: return &unescape($reply);
2065: }
2066: }
2067: return 'timeout:'.$queryid;
2068: }
2069:
2070: sub courselog_query {
2071: #
2072: # possible filters:
2073: # url: url or symb
2074: # username
2075: # domain
2076: # action: view, submit, grade
2077: # start: timestamp
2078: # end: timestamp
2079: #
2080: my (%filters)=@_;
2081: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2082: if ($filters{'url'}) {
2083: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2084: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2085: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2086: }
2087: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2088: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2089: return &log_query($cname,$cdom,'courselog',%filters);
2090: }
2091:
2092: sub userlog_query {
2093: my ($uname,$udom,%filters)=@_;
2094: return &log_query($uname,$udom,'userlog',%filters);
2095: }
2096:
2097: # ------------------------------------------------------------------ Plain Text
2098:
2099: sub plaintext {
2100: my $short=shift;
2101: return $prp{$short};
2102: }
2103:
2104: # ----------------------------------------------------------------- Assign Role
2105:
2106: sub assignrole {
2107: my ($udom,$uname,$url,$role,$end,$start)=@_;
2108: my $mrole;
2109: if ($role =~ /^cr\//) {
2110: unless (&allowed('ccr',$url)) {
2111: &logthis('Refused custom assignrole: '.
2112: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2113: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2114: return 'refused';
2115: }
2116: $mrole='cr';
2117: } else {
2118: my $cwosec=$url;
2119: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2120: unless (&allowed('c'.$role,$cwosec)) {
2121: &logthis('Refused assignrole: '.
2122: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2123: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2124: return 'refused';
2125: }
2126: $mrole=$role;
2127: }
2128: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2129: "$udom:$uname:$url".'_'."$mrole=$role";
2130: if ($end) { $command.='_'.$end; }
2131: if ($start) {
2132: if ($end) {
2133: $command.='_'.$start;
2134: } else {
2135: $command.='_0_'.$start;
2136: }
2137: }
2138: return &reply($command,&homeserver($uname,$udom));
2139: }
2140:
2141: # -------------------------------------------------- Modify user authentication
2142: # Overrides without validation
2143:
2144: sub modifyuserauth {
2145: my ($udom,$uname,$umode,$upass)=@_;
2146: my $uhome=&homeserver($uname,$udom);
2147: unless (&allowed('mau',$udom)) { return 'refused'; }
2148: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2149: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2150: ' in domain '.$ENV{'request.role.domain'});
2151: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2152: &escape($upass),$uhome);
2153: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2154: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2155: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2156: &log($udom,,$uname,$uhome,
2157: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2158: $ENV{'user.name'}.', '.$umode.
2159: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2160: unless ($reply eq 'ok') {
2161: &logthis('Authentication mode error: '.$reply);
2162: return 'error: '.$reply;
2163: }
2164: return 'ok';
2165: }
2166:
2167: # --------------------------------------------------------------- Modify a user
2168:
2169: sub modifyuser {
2170: my ($udom, $uname, $uid,
2171: $umode, $upass, $first,
2172: $middle, $last, $gene,
2173: $forceid, $desiredhome)=@_;
2174: $udom=~s/\W//g;
2175: $uname=~s/\W//g;
2176: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2177: $umode.', '.$first.', '.$middle.', '.
2178: $last.', '.$gene.'(forceid: '.$forceid.')'.
2179: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2180: ' desiredhome not specified').
2181: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2182: ' in domain '.$ENV{'request.role.domain'});
2183: my $uhome=&homeserver($uname,$udom,'true');
2184: # ----------------------------------------------------------------- Create User
2185: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2186: my $unhome='';
2187: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2188: $unhome = $desiredhome;
2189: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2190: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2191: } else { # load balancing routine for determining $unhome
2192: my $tryserver;
2193: my $loadm=10000000;
2194: foreach $tryserver (keys %libserv) {
2195: if ($hostdom{$tryserver} eq $udom) {
2196: my $answer=reply('load',$tryserver);
2197: if (($answer=~/\d+/) && ($answer<$loadm)) {
2198: $loadm=$answer;
2199: $unhome=$tryserver;
2200: }
2201: }
2202: }
2203: }
2204: if (($unhome eq '') || ($unhome eq 'no_host')) {
2205: return 'error: unable to find a home server for '.$uname.
2206: ' in domain '.$udom;
2207: }
2208: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2209: &escape($upass),$unhome);
2210: unless ($reply eq 'ok') {
2211: return 'error: '.$reply;
2212: }
2213: $uhome=&homeserver($uname,$udom,'true');
2214: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2215: return 'error: verify home';
2216: }
2217: } # End of creation of new user
2218: # ---------------------------------------------------------------------- Add ID
2219: if ($uid) {
2220: $uid=~tr/A-Z/a-z/;
2221: my %uidhash=&idrget($udom,$uname);
2222: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2223: && (!$forceid)) {
2224: unless ($uid eq $uidhash{$uname}) {
2225: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2226: }
2227: } else {
2228: &idput($udom,($uname => $uid));
2229: }
2230: }
2231: # -------------------------------------------------------------- Add names, etc
2232: my %names=&get('environment',
2233: ['firstname','middlename','lastname','generation'],
2234: $udom,$uname);
2235: if ($names{'firstname'} =~ m/^error:.*/) { %names=(); }
2236: if ($first) { $names{'firstname'} = $first; }
2237: if ($middle) { $names{'middlename'} = $middle; }
2238: if ($last) { $names{'lastname'} = $last; }
2239: if ($gene) { $names{'generation'} = $gene; }
2240: my $reply = &put('environment', \%names, $udom,$uname);
2241: if ($reply ne 'ok') { return 'error: '.$reply; }
2242: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2243: $umode.', '.$first.', '.$middle.', '.
2244: $last.', '.$gene.' by '.
2245: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2246: return 'ok';
2247: }
2248:
2249: # -------------------------------------------------------------- Modify student
2250:
2251: sub modifystudent {
2252: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2253: $end,$start,$forceid,$desiredhome)=@_;
2254: my $cid='';
2255: unless ($cid=$ENV{'request.course.id'}) {
2256: return 'not_in_class';
2257: }
2258: # --------------------------------------------------------------- Make the user
2259: my $reply=&modifyuser
2260: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2261: $desiredhome);
2262: unless ($reply eq 'ok') { return $reply; }
2263: my $uhome=&homeserver($uname,$udom);
2264: if (($uhome eq '') || ($uhome eq 'no_host')) {
2265: return 'error: no such user';
2266: }
2267: # -------------------------------------------------- Add student to course list
2268: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2269: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2270: &escape($uname.':'.$udom).'='.
2271: &escape($end.':'.$start),
2272: $ENV{'course.'.$cid.'.home'});
2273: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2274: return 'error: '.$reply;
2275: }
2276: # ---------------------------------------------------- Add student role to user
2277: my $uurl='/'.$cid;
2278: $uurl=~s/\_/\//g;
2279: if ($usec) {
2280: $uurl.='/'.$usec;
2281: }
2282: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2283: }
2284:
2285: # ------------------------------------------------- Write to course preferences
2286:
2287: sub writecoursepref {
2288: my ($courseid,%prefs)=@_;
2289: $courseid=~s/^\///;
2290: $courseid=~s/\_/\//g;
2291: my ($cdomain,$cnum)=split(/\//,$courseid);
2292: my $chome=homeserver($cnum,$cdomain);
2293: if (($chome eq '') || ($chome eq 'no_host')) {
2294: return 'error: no such course';
2295: }
2296: my $cstring='';
2297: foreach (keys %prefs) {
2298: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2299: }
2300: $cstring=~s/\&$//;
2301: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2302: }
2303:
2304: # ---------------------------------------------------------- Make/modify course
2305:
2306: sub createcourse {
2307: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2308: $url=&declutter($url);
2309: my $cid='';
2310: unless (&allowed('ccc',$udom)) {
2311: return 'refused';
2312: }
2313: # ------------------------------------------------------------------- Create ID
2314: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2315: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2316: # ----------------------------------------------- Make sure that does not exist
2317: my $uhome=&homeserver($uname,$udom,'true');
2318: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2319: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2320: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2321: $uhome=&homeserver($uname,$udom,'true');
2322: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2323: return 'error: unable to generate unique course-ID';
2324: }
2325: }
2326: # ------------------------------------------------ Check supplied server name
2327: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2328: if (! exists($libserv{$course_server})) {
2329: return 'error:bad server name '.$course_server;
2330: }
2331: # ------------------------------------------------------------- Make the course
2332: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2333: $course_server);
2334: unless ($reply eq 'ok') { return 'error: '.$reply; }
2335: $uhome=&homeserver($uname,$udom,'true');
2336: if (($uhome eq '') || ($uhome eq 'no_host')) {
2337: return 'error: no such course';
2338: }
2339: # ----------------------------------------------------------------- Course made
2340: my $topurl=$url;
2341: unless ($nonstandard) {
2342: # ------------------------------------------ For standard courses, make top url
2343: my $mapurl=&clutter($url);
2344: $ENV{'form.initmap'}=(<<ENDINITMAP);
2345: <map>
2346: <resource id="1" type="start"></resource>
2347: <resource id="2" src="$mapurl"></resource>
2348: <resource id="3" type="finish"></resource>
2349: <link index="1" from="1" to="2"></link>
2350: <link index="2" from="2" to="3"></link>
2351: </map>
2352: ENDINITMAP
2353: $topurl=&declutter(
2354: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2355: );
2356: }
2357: # ----------------------------------------------------------- Write preferences
2358: &writecoursepref($udom.'_'.$uname,
2359: ('description' => $description,
2360: 'url' => $topurl));
2361: return '/'.$udom.'/'.$uname;
2362: }
2363:
2364: # ---------------------------------------------------------- Assign Custom Role
2365:
2366: sub assigncustomrole {
2367: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2368: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2369: $end,$start);
2370: }
2371:
2372: # ----------------------------------------------------------------- Revoke Role
2373:
2374: sub revokerole {
2375: my ($udom,$uname,$url,$role)=@_;
2376: my $now=time;
2377: return &assignrole($udom,$uname,$url,$role,$now);
2378: }
2379:
2380: # ---------------------------------------------------------- Revoke Custom Role
2381:
2382: sub revokecustomrole {
2383: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2384: my $now=time;
2385: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2386: }
2387:
2388: # ------------------------------------------------------------ Directory lister
2389:
2390: sub dirlist {
2391: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2392:
2393: $uri=~s/^\///;
2394: $uri=~s/\/$//;
2395: my ($udom, $uname);
2396: (undef,$udom,$uname)=split(/\//,$uri);
2397: if(defined($userdomain)) {
2398: $udom = $userdomain;
2399: }
2400: if(defined($username)) {
2401: $uname = $username;
2402: }
2403:
2404: my $dirRoot = $perlvar{'lonDocRoot'};
2405: if(defined($alternateDirectoryRoot)) {
2406: $dirRoot = $alternateDirectoryRoot;
2407: $dirRoot =~ s/\/$//;
2408: }
2409:
2410: if($udom) {
2411: if($uname) {
2412: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2413: homeserver($uname,$udom));
2414: return split(/:/,$listing);
2415: } elsif(!defined($alternateDirectoryRoot)) {
2416: my $tryserver;
2417: my %allusers=();
2418: foreach $tryserver (keys %libserv) {
2419: if($hostdom{$tryserver} eq $udom) {
2420: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2421: $udom, $tryserver);
2422: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2423: && ($listing ne 'con_lost')) {
2424: foreach (split(/:/,$listing)) {
2425: my ($entry,@stat)=split(/&/,$_);
2426: $allusers{$entry}=1;
2427: }
2428: }
2429: }
2430: }
2431: my $alluserstr='';
2432: foreach (sort keys %allusers) {
2433: $alluserstr.=$_.'&user:';
2434: }
2435: $alluserstr=~s/:$//;
2436: return split(/:/,$alluserstr);
2437: } else {
2438: my @emptyResults = ();
2439: push(@emptyResults, 'missing user name');
2440: return split(':',@emptyResults);
2441: }
2442: } elsif(!defined($alternateDirectoryRoot)) {
2443: my $tryserver;
2444: my %alldom=();
2445: foreach $tryserver (keys %libserv) {
2446: $alldom{$hostdom{$tryserver}}=1;
2447: }
2448: my $alldomstr='';
2449: foreach (sort keys %alldom) {
2450: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2451: }
2452: $alldomstr=~s/:$//;
2453: return split(/:/,$alldomstr);
2454: } else {
2455: my @emptyResults = ();
2456: push(@emptyResults, 'missing domain');
2457: return split(':',@emptyResults);
2458: }
2459: }
2460:
2461: # -------------------------------------------------------- Value of a Condition
2462:
2463: sub directcondval {
2464: my $number=shift;
2465: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2466: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2467: } else {
2468: return 2;
2469: }
2470: }
2471:
2472: sub condval {
2473: my $condidx=shift;
2474: my $result=0;
2475: my $allpathcond='';
2476: foreach (split(/\|/,$condidx)) {
2477: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2478: $allpathcond.=
2479: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2480: }
2481: }
2482: $allpathcond=~s/\|$//;
2483: if ($ENV{'request.course.id'}) {
2484: if ($allpathcond) {
2485: my $operand='|';
2486: my @stack;
2487: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2488: if ($_ eq '(') {
2489: push @stack,($operand,$result)
2490: } elsif ($_ eq ')') {
2491: my $before=pop @stack;
2492: if (pop @stack eq '&') {
2493: $result=$result>$before?$before:$result;
2494: } else {
2495: $result=$result>$before?$result:$before;
2496: }
2497: } elsif (($_ eq '&') || ($_ eq '|')) {
2498: $operand=$_;
2499: } else {
2500: my $new=directcondval($_);
2501: if ($operand eq '&') {
2502: $result=$result>$new?$new:$result;
2503: } else {
2504: $result=$result>$new?$result:$new;
2505: }
2506: }
2507: }
2508: }
2509: }
2510: return $result;
2511: }
2512:
2513: # --------------------------------------------------- Course Resourcedata Query
2514:
2515: sub courseresdata {
2516: my ($coursenum,$coursedomain,@which)=@_;
2517: my $coursehom=&homeserver($coursenum,$coursedomain);
2518: my $hashid=$coursenum.':'.$coursedomain;
2519: my $dodump=0;
2520: if (!defined($courseresdatacache{$hashid.'.time'})) {
2521: $dodump=1;
2522: } else {
2523: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2524: }
2525: if ($dodump) {
2526: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2527: my ($tmp) = keys(%dumpreply);
2528: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2529: $courseresdatacache{$hashid.'.time'}=time;
2530: $courseresdatacache{$hashid}=\%dumpreply;
2531: }
2532: }
2533: foreach my $item (@which) {
2534: if ($courseresdatacache{$hashid}->{$item}) {
2535: return $courseresdatacache{$hashid}->{$item};
2536: }
2537: }
2538: return '';
2539: }
2540:
2541: # --------------------------------------------------------- Value of a Variable
2542:
2543: sub EXT {
2544: my ($varname,$symbparm,$udom,$uname)=@_;
2545:
2546: unless ($varname) { return ''; }
2547:
2548: #get real user name/domain, courseid and symb
2549: my $courseid;
2550: if (!($uname && $udom)) {
2551: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2552: if (!$symbparm) { $symbparm=$cursymb; }
2553: } else {
2554: $courseid=$ENV{'request.course.id'};
2555: }
2556:
2557: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2558: my $rest;
2559: if ($therest[0]) {
2560: $rest=join('.',@therest);
2561: } else {
2562: $rest='';
2563: }
2564: my $qualifierrest=$qualifier;
2565: if ($rest) { $qualifierrest.='.'.$rest; }
2566: my $spacequalifierrest=$space;
2567: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2568: if ($realm eq 'user') {
2569: # --------------------------------------------------------------- user.resource
2570: if ($space eq 'resource') {
2571: my %restored=&restore(undef,undef,$udom,$uname);
2572: return $restored{$qualifierrest};
2573: # ----------------------------------------------------------------- user.access
2574: } elsif ($space eq 'access') {
2575: # FIXME - not supporting calls for a specific user
2576: return &allowed($qualifier,$rest);
2577: # ------------------------------------------ user.preferences, user.environment
2578: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2579: if (($uname eq $ENV{'user.name'}) &&
2580: ($udom eq $ENV{'user.domain'})) {
2581: return $ENV{join('.',('environment',$qualifierrest))};
2582: } else {
2583: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2584: return $returnhash{$qualifierrest};
2585: }
2586: # ----------------------------------------------------------------- user.course
2587: } elsif ($space eq 'course') {
2588: # FIXME - not supporting calls for a specific user
2589: return $ENV{join('.',('request.course',$qualifier))};
2590: # ------------------------------------------------------------------- user.role
2591: } elsif ($space eq 'role') {
2592: # FIXME - not supporting calls for a specific user
2593: my ($role,$where)=split(/\./,$ENV{'request.role'});
2594: if ($qualifier eq 'value') {
2595: return $role;
2596: } elsif ($qualifier eq 'extent') {
2597: return $where;
2598: }
2599: # ----------------------------------------------------------------- user.domain
2600: } elsif ($space eq 'domain') {
2601: return $udom;
2602: # ------------------------------------------------------------------- user.name
2603: } elsif ($space eq 'name') {
2604: return $uname;
2605: # ---------------------------------------------------- Any other user namespace
2606: } else {
2607: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2608: my %reply=&get($space,[$item]);
2609: return $reply{$item};
2610: }
2611: } elsif ($realm eq 'query') {
2612: # ---------------------------------------------- pull stuff out of query string
2613: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
2614: return $ENV{'form.'.$space};
2615: } elsif ($realm eq 'request') {
2616: # ------------------------------------------------------------- request.browser
2617: if ($space eq 'browser') {
2618: return $ENV{'browser.'.$qualifier};
2619: # ------------------------------------------------------------ request.filename
2620: } else {
2621: return $ENV{'request.'.$spacequalifierrest};
2622: }
2623: } elsif ($realm eq 'course') {
2624: # ---------------------------------------------------------- course.description
2625: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
2626: } elsif ($realm eq 'resource') {
2627:
2628: if ($courseid eq $ENV{'request.course.id'}) {
2629:
2630: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2631:
2632: # ----------------------------------------------------- Cascading lookup scheme
2633: if (!$symbparm) { $symbparm=&symbread(); }
2634: my $symbp=$symbparm;
2635: my $mapp=(split(/\_\_\_/,$symbp))[0];
2636:
2637: my $symbparm=$symbp.'.'.$spacequalifierrest;
2638: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2639:
2640: my $section;
2641: if (($ENV{'user.name'} eq $uname) &&
2642: ($ENV{'user.domain'} eq $udom)) {
2643: $section=$ENV{'request.course.sec'};
2644: } else {
2645: $section=&usection($udom,$uname,$courseid);
2646: }
2647:
2648: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
2649: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
2650: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
2651:
2652: my $courselevel=$courseid.'.'.$spacequalifierrest;
2653: my $courselevelr=$courseid.'.'.$symbparm;
2654: my $courselevelm=$courseid.'.'.$mapparm;
2655:
2656: # ----------------------------------------------------------- first, check user
2657: my %resourcedata=&get('resourcedata',
2658: [$courselevelr,$courselevelm,$courselevel],
2659: $udom,$uname);
2660: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2661: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2662:
2663: if ($resourcedata{$courselevelr}) {
2664: return $resourcedata{$courselevelr}; }
2665: if ($resourcedata{$courselevelm}) {
2666: return $resourcedata{$courselevelm}; }
2667: if ($resourcedata{$courselevel}) {
2668: return $resourcedata{$courselevel}; }
2669: } else {
2670: if ($resourcedata{$courselevelr}!~/No such file/) {
2671: &logthis("<font color=blue>WARNING:".
2672: " Trying to get resource data for ".
2673: $uname." at ".$udom.": ".
2674: $resourcedata{$courselevelr}."</font>");
2675: }
2676: }
2677:
2678: # -------------------------------------------------------- second, check course
2679:
2680: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
2681: $ENV{'course.'.$courseid.'.domain'},
2682: ($seclevelr,$seclevelm,$seclevel,
2683: $courselevelr,$courselevelm,
2684: $courselevel));
2685: if ($coursereply) { return $coursereply; }
2686:
2687: # ------------------------------------------------------ third, check map parms
2688: my %parmhash=();
2689: my $thisparm='';
2690: if (tie(%parmhash,'GDBM_File',
2691: $ENV{'request.course.fn'}.'_parms.db',
2692: &GDBM_READER(),0640)) {
2693: $thisparm=$parmhash{$symbparm};
2694: untie(%parmhash);
2695: }
2696: if ($thisparm) { return $thisparm; }
2697: }
2698: # --------------------------------------------- last, look in resource metadata
2699:
2700: $spacequalifierrest=~s/\./\_/;
2701: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2702: if ($metadata) { return $metadata; }
2703: $metadata=&metadata($ENV{'request.filename'},
2704: 'parameter_'.$spacequalifierrest);
2705: if ($metadata) { return $metadata; }
2706:
2707: # ------------------------------------------------------------------ Cascade up
2708: unless ($space eq '0') {
2709: my ($part,$id)=split(/\_/,$space);
2710: if ($id) {
2711: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2712: $symbparm,$udom,$uname);
2713: if ($partgeneral) { return $partgeneral; }
2714: } else {
2715: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2716: $symbparm,$udom,$uname);
2717: if ($resourcegeneral) { return $resourcegeneral; }
2718: }
2719: }
2720:
2721: # ---------------------------------------------------- Any other user namespace
2722: } elsif ($realm eq 'environment') {
2723: # ----------------------------------------------------------------- environment
2724: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
2725: return $ENV{'environment.'.$spacequalifierrest};
2726: } else {
2727: my %returnhash=&userenvironment($udom,$uname,
2728: $spacequalifierrest);
2729: return $returnhash{$spacequalifierrest};
2730: }
2731: } elsif ($realm eq 'system') {
2732: # ----------------------------------------------------------------- system.time
2733: if ($space eq 'time') {
2734: return time;
2735: }
2736: }
2737: return '';
2738: }
2739:
2740: # ---------------------------------------------------------------- Get metadata
2741:
2742: sub metadata {
2743: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2744:
2745: $uri=&declutter($uri);
2746: my $filename=$uri;
2747: $uri=~s/\.meta$//;
2748: #
2749: # Is the metadata already cached?
2750: # Look at timestamp of caching
2751: # Everything is cached by the main uri, libraries are never directly cached
2752: #
2753: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2754: #
2755: # Is this a recursive call for a library?
2756: #
2757: if ($liburi) {
2758: $liburi=&declutter($liburi);
2759: $filename=$liburi;
2760: }
2761: my %metathesekeys=();
2762: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2763: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2764: my $parser=HTML::LCParser->new(\$metastring);
2765: my $token;
2766: undef %metathesekeys;
2767: while ($token=$parser->get_token) {
2768: if ($token->[0] eq 'S') {
2769: if (defined($token->[2]->{'package'})) {
2770: #
2771: # This is a package - get package info
2772: #
2773: my $package=$token->[2]->{'package'};
2774: my $keyroot='';
2775: if ($prefix) {
2776: $keyroot.='_'.$prefix;
2777: } else {
2778: if (defined($token->[2]->{'part'})) {
2779: $keyroot.='_'.$token->[2]->{'part'};
2780: }
2781: }
2782: if (defined($token->[2]->{'id'})) {
2783: $keyroot.='_'.$token->[2]->{'id'};
2784: }
2785: if ($metacache{$uri.':packages'}) {
2786: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2787: } else {
2788: $metacache{$uri.':packages'}=$package.$keyroot;
2789: }
2790: foreach (keys %packagetab) {
2791: if ($_=~/^$package\&/) {
2792: my ($pack,$name,$subp)=split(/\&/,$_);
2793: my $value=$packagetab{$_};
2794: my $part=$keyroot;
2795: $part=~s/^\_//;
2796: if ($subp eq 'display') {
2797: $value.=' [Part: '.$part.']';
2798: }
2799: my $unikey='parameter'.$keyroot.'_'.$name;
2800: $metathesekeys{$unikey}=1;
2801: $metacache{$uri.':'.$unikey.'.part'}=$part;
2802: unless
2803: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2804: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2805: }
2806: }
2807: }
2808: } else {
2809: #
2810: # This is not a package - some other kind of start tag
2811: #
2812: my $entry=$token->[1];
2813: my $unikey;
2814: if ($entry eq 'import') {
2815: $unikey='';
2816: } else {
2817: $unikey=$entry;
2818: }
2819: if ($prefix) {
2820: $unikey.=$prefix;
2821: } else {
2822: if (defined($token->[2]->{'part'})) {
2823: $unikey.='_'.$token->[2]->{'part'};
2824: }
2825: }
2826: if (defined($token->[2]->{'id'})) {
2827: $unikey.='_'.$token->[2]->{'id'};
2828: }
2829:
2830: if ($entry eq 'import') {
2831: #
2832: # Importing a library here
2833: #
2834: if (defined($depthcount)) { $depthcount++; } else
2835: { $depthcount=0; }
2836: if ($depthcount<20) {
2837: foreach (split(/\,/,&metadata($uri,'keys',
2838: $parser->get_text('/import'),$unikey,
2839: $depthcount))) {
2840: $metathesekeys{$_}=1;
2841: }
2842: }
2843: } else {
2844:
2845: if (defined($token->[2]->{'name'})) {
2846: $unikey.='_'.$token->[2]->{'name'};
2847: }
2848: $metathesekeys{$unikey}=1;
2849: foreach (@{$token->[3]}) {
2850: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2851: }
2852: unless (
2853: $metacache{$uri.':'.$unikey}=&HTML::Entities::decode($parser->get_text('/'.$entry))
2854: ) { $metacache{$uri.':'.$unikey}=
2855: $metacache{$uri.':'.$unikey.'.default'};
2856: }
2857: # end of not-a-package not-a-library import
2858: }
2859: # end of not-a-package start tag
2860: }
2861: # the next is the end of "start tag"
2862: }
2863: }
2864: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
2865: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2866: $metacache{$uri.':cachedtimestamp'}=time;
2867: # this is the end of "was not already recently cached
2868: }
2869: return $metacache{$uri.':'.$what};
2870: }
2871:
2872: sub metadata_generate_part0 {
2873: my ($metadata,$metacache,$uri) = @_;
2874: my %allnames;
2875: foreach my $metakey (sort keys %$metadata) {
2876: if ($metakey=~/^parameter\_(.*)/) {
2877: my $part=$$metacache{$uri.':'.$metakey.'.part'};
2878: my $name=$$metacache{$uri.':'.$metakey.'.name'};
2879: if (! exists($$metadata{'parameter_0_'.$name})) {
2880: $allnames{$name}=$part;
2881: }
2882: }
2883: }
2884: foreach my $name (keys(%allnames)) {
2885: $$metadata{"parameter_0_$name"}=1;
2886: my $key="$uri:parameter_0_$name";
2887: $$metacache{"$key.part"}='0';
2888: $$metacache{"$key.name"}=$name;
2889: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
2890: $allnames{$name}.'_'.$name.
2891: '.type'};
2892: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
2893: '.display'};
2894: my $expr='\\[Part: '.$allnames{$name}.'\\]';
2895: $olddis=~s/$expr/\[Part: 0\]/;
2896: $$metacache{"$key.display"}=$olddis;
2897: }
2898: }
2899:
2900: # ------------------------------------------------- Update symbolic store links
2901:
2902: sub symblist {
2903: my ($mapname,%newhash)=@_;
2904: $mapname=declutter($mapname);
2905: my %hash;
2906: if (($ENV{'request.course.fn'}) && (%newhash)) {
2907: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2908: &GDBM_WRCREAT(),0640)) {
2909: foreach (keys %newhash) {
2910: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2911: }
2912: if (untie(%hash)) {
2913: return 'ok';
2914: }
2915: }
2916: }
2917: return 'error';
2918: }
2919:
2920: # --------------------------------------------------------------- Verify a symb
2921:
2922: sub symbverify {
2923: my ($symb,$thisfn)=@_;
2924: $thisfn=&declutter($thisfn);
2925: # direct jump to resource in page or to a sequence - will construct own symbs
2926: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
2927: # check URL part
2928: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
2929: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
2930:
2931: $symb=&symbclean($symb);
2932:
2933: my %bighash;
2934: my $okay=0;
2935: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2936: &GDBM_READER(),0640)) {
2937: my $ids=$bighash{'ids_/res/'.$thisfn};
2938: unless ($ids) {
2939: $ids=$bighash{'ids_/'.$thisfn};
2940: }
2941: if ($ids) {
2942: # ------------------------------------------------------------------- Has ID(s)
2943: foreach (split(/\,/,$ids)) {
2944: my ($mapid,$resid)=split(/\./,$_);
2945: if (
2946: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
2947: eq $symb) {
2948: $okay=1;
2949: }
2950: }
2951: }
2952: untie(%bighash);
2953: }
2954: return $okay;
2955: }
2956:
2957: # --------------------------------------------------------------- Clean-up symb
2958:
2959: sub symbclean {
2960: my $symb=shift;
2961:
2962: # remove version from map
2963: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
2964:
2965: # remove version from URL
2966: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
2967:
2968: return $symb;
2969: }
2970:
2971: # ------------------------------------------------------ Return symb list entry
2972:
2973: sub symbread {
2974: my ($thisfn,$donotrecurse)=@_;
2975: # no filename provided? try from environment
2976: unless ($thisfn) {
2977: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
2978: $thisfn=$ENV{'request.filename'};
2979: }
2980: # is that filename actually a symb? Verify, clean, and return
2981: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
2982: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
2983: }
2984: $thisfn=declutter($thisfn);
2985: my %hash;
2986: my %bighash;
2987: my $syval='';
2988: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2989: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2990: &GDBM_READER(),0640)) {
2991: $syval=$hash{$thisfn};
2992: untie(%hash);
2993: }
2994: # ---------------------------------------------------------- There was an entry
2995: if ($syval) {
2996: unless ($syval=~/\_\d+$/) {
2997: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2998: &appenv('request.ambiguous' => $thisfn);
2999: return '';
3000: }
3001: $syval.=$1;
3002: }
3003: } else {
3004: # ------------------------------------------------------- Was not in symb table
3005: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3006: &GDBM_READER(),0640)) {
3007: # ---------------------------------------------- Get ID(s) for current resource
3008: my $ids=$bighash{'ids_/res/'.$thisfn};
3009: unless ($ids) {
3010: $ids=$bighash{'ids_/'.$thisfn};
3011: }
3012: unless ($ids) {
3013: # alias?
3014: $ids=$bighash{'mapalias_'.$thisfn};
3015: }
3016: if ($ids) {
3017: # ------------------------------------------------------------------- Has ID(s)
3018: my @possibilities=split(/\,/,$ids);
3019: if ($#possibilities==0) {
3020: # ----------------------------------------------- There is only one possibility
3021: my ($mapid,$resid)=split(/\./,$ids);
3022: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3023: } elsif (!$donotrecurse) {
3024: # ------------------------------------------ There is more than one possibility
3025: my $realpossible=0;
3026: foreach (@possibilities) {
3027: my $file=$bighash{'src_'.$_};
3028: if (&allowed('bre',$file)) {
3029: my ($mapid,$resid)=split(/\./,$_);
3030: if ($bighash{'map_type_'.$mapid} ne 'page') {
3031: $realpossible++;
3032: $syval=declutter($bighash{'map_id_'.$mapid}).
3033: '___'.$resid;
3034: }
3035: }
3036: }
3037: if ($realpossible!=1) { $syval=''; }
3038: } else {
3039: $syval='';
3040: }
3041: }
3042: untie(%bighash)
3043: }
3044: }
3045: if ($syval) {
3046: return &symbclean($syval.'___'.$thisfn);
3047: }
3048: }
3049: &appenv('request.ambiguous' => $thisfn);
3050: return '';
3051: }
3052:
3053: # ---------------------------------------------------------- Return random seed
3054:
3055: sub numval {
3056: my $txt=shift;
3057: $txt=~tr/A-J/0-9/;
3058: $txt=~tr/a-j/0-9/;
3059: $txt=~tr/K-T/0-9/;
3060: $txt=~tr/k-t/0-9/;
3061: $txt=~tr/U-Z/0-5/;
3062: $txt=~tr/u-z/0-5/;
3063: $txt=~s/\D//g;
3064: return int($txt);
3065: }
3066:
3067: sub rndseed {
3068: my ($symb,$courseid,$domain,$username)=@_;
3069: if (!$symb) {
3070: unless ($symb=&symbread()) { return time; }
3071: }
3072: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3073: if (!$domain) {$domain=$ENV{'user.domain'};}
3074: if (!$username) {$username=$ENV{'user.name'};}
3075: {
3076: use integer;
3077: my $symbchck=unpack("%32C*",$symb) << 27;
3078: my $symbseed=numval($symb) << 22;
3079: my $namechck=unpack("%32C*",$username) << 17;
3080: my $nameseed=numval($username) << 12;
3081: my $domainseed=unpack("%32C*",$domain) << 7;
3082: my $courseseed=unpack("%32C*",$courseid);
3083: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3084: #uncommenting these lines can break things!
3085: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3086: #&Apache::lonxml::debug("rndseed :$num:$symb");
3087: return $num;
3088: }
3089: }
3090:
3091: sub ireceipt {
3092: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3093: my $cuname=unpack("%32C*",$funame);
3094: my $cudom=unpack("%32C*",$fudom);
3095: my $cucourseid=unpack("%32C*",$fucourseid);
3096: my $cusymb=unpack("%32C*",$fusymb);
3097: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3098: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3099: ($cunique%$cuname+
3100: $cunique%$cudom+
3101: $cusymb%$cuname+
3102: $cusymb%$cudom+
3103: $cucourseid%$cuname+
3104: $cucourseid%$cudom);
3105: }
3106:
3107: sub receipt {
3108: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3109: return &ireceipt($name,$domain,$courseid,$symb);
3110: }
3111:
3112: # ------------------------------------------------------------ Serves up a file
3113: # returns either the contents of the file or a -1
3114: sub getfile {
3115: my $file=shift;
3116: if ($file=~/^\/*uploaded\//) { # user file
3117: my $ua=new LWP::UserAgent;
3118: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3119: my $response=$ua->request($request);
3120: if ($response->is_success()) {
3121: return $response->content;
3122: } else {
3123: return -1;
3124: }
3125: } else { # normal file from res space
3126: &repcopy($file);
3127: if (! -e $file ) { return -1; };
3128: my $fh=Apache::File->new($file);
3129: my $a='';
3130: while (<$fh>) { $a .=$_; }
3131: return $a;
3132: }
3133: }
3134:
3135: sub filelocation {
3136: my ($dir,$file) = @_;
3137: my $location;
3138: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3139: if ($file=~m:^/~:) { # is a contruction space reference
3140: $location = $file;
3141: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3142: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3143: $location=$file;
3144: } else {
3145: $file=~s/^$perlvar{'lonDocRoot'}//;
3146: $file=~s:^/*res::;
3147: if ( !( $file =~ m:^/:) ) {
3148: $location = $dir. '/'.$file;
3149: } else {
3150: $location = '/home/httpd/html/res'.$file;
3151: }
3152: }
3153: $location=~s://+:/:g; # remove duplicate /
3154: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3155: return $location;
3156: }
3157:
3158: sub hreflocation {
3159: my ($dir,$file)=@_;
3160: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3161: my $finalpath=filelocation($dir,$file);
3162: $finalpath=~s/^\/home\/httpd\/html//;
3163: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3164: return $finalpath;
3165: } else {
3166: return $file;
3167: }
3168: }
3169:
3170: # ------------------------------------------------------------- Declutters URLs
3171:
3172: sub declutter {
3173: my $thisfn=shift;
3174: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3175: $thisfn=~s/^\///;
3176: $thisfn=~s/^res\///;
3177: $thisfn=~s/\?.+$//;
3178: return $thisfn;
3179: }
3180:
3181: # ------------------------------------------------------------- Clutter up URLs
3182:
3183: sub clutter {
3184: my $thisfn='/'.&declutter(shift);
3185: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3186: $thisfn='/res'.$thisfn;
3187: }
3188: return $thisfn;
3189: }
3190:
3191: # -------------------------------------------------------- Escape Special Chars
3192:
3193: sub escape {
3194: my $str=shift;
3195: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3196: return $str;
3197: }
3198:
3199: # ----------------------------------------------------- Un-Escape Special Chars
3200:
3201: sub unescape {
3202: my $str=shift;
3203: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3204: return $str;
3205: }
3206:
3207: # ================================================================ Main Program
3208:
3209: sub goodbye {
3210: &logthis("Starting Shut down");
3211: &flushcourselogs();
3212: &logthis("Shutting down");
3213: }
3214:
3215: BEGIN {
3216: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3217: unless ($readit) {
3218: {
3219: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3220:
3221: while (my $configline=<$config>) {
3222: if ($configline =~ /^[^\#]*PerlSetVar/) {
3223: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3224: chomp($varvalue);
3225: $perlvar{$varname}=$varvalue;
3226: }
3227: }
3228: }
3229: {
3230: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3231:
3232: while (my $configline=<$config>) {
3233: if ($configline =~ /^[^\#]*PerlSetVar/) {
3234: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3235: chomp($varvalue);
3236: $perlvar{$varname}=$varvalue;
3237: }
3238: }
3239: }
3240:
3241: # ------------------------------------------------------------- Read hosts file
3242: {
3243: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3244:
3245: while (my $configline=<$config>) {
3246: chomp($configline);
3247: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3248: if ($id && $domain && $role && $name && $ip) {
3249: $hostname{$id}=$name;
3250: $hostdom{$id}=$domain;
3251: $hostip{$id}=$ip;
3252: if ($domdescr) { $domaindescription{$domain}=$domdescr; }
3253: if ($role eq 'library') { $libserv{$id}=$name; }
3254: } else {
3255: if ($configline) {
3256: &logthis("Skipping hosts.tab line -$configline-");
3257: }
3258: }
3259: }
3260: }
3261:
3262: # ------------------------------------------------------ Read spare server file
3263: {
3264: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3265:
3266: while (my $configline=<$config>) {
3267: chomp($configline);
3268: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
3269: $spareid{$configline}=1;
3270: }
3271: }
3272: }
3273: # ------------------------------------------------------------ Read permissions
3274: {
3275: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3276:
3277: while (my $configline=<$config>) {
3278: chomp($configline);
3279: if ($configline) {
3280: my ($role,$perm)=split(/ /,$configline);
3281: if ($perm ne '') { $pr{$role}=$perm; }
3282: }
3283: }
3284: }
3285:
3286: # -------------------------------------------- Read plain texts for permissions
3287: {
3288: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3289:
3290: while (my $configline=<$config>) {
3291: chomp($configline);
3292: if ($configline) {
3293: my ($short,$plain)=split(/:/,$configline);
3294: if ($plain ne '') { $prp{$short}=$plain; }
3295: }
3296: }
3297: }
3298:
3299: # ---------------------------------------------------------- Read package table
3300: {
3301: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3302:
3303: while (my $configline=<$config>) {
3304: chomp($configline);
3305: my ($short,$plain)=split(/:/,$configline);
3306: my ($pack,$name)=split(/\&/,$short);
3307: if ($plain ne '') {
3308: $packagetab{$pack.'&'.$name.'&name'}=$name;
3309: $packagetab{$short}=$plain;
3310: }
3311: }
3312: }
3313:
3314: %metacache=();
3315:
3316: $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
3317: $dumpcount=0;
3318:
3319: &logtouch();
3320: &logthis('<font color=yellow>INFO: Read configuration</font>');
3321: $readit=1;
3322: }
3323: }
3324:
3325: 1;
3326: __END__
3327:
3328: =pod
3329:
3330: =head1 NAME
3331:
3332: Apache::lonnet - Subroutines to ask questions about things in the network.
3333:
3334: =head1 SYNOPSIS
3335:
3336: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3337:
3338: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3339:
3340: Common parameters:
3341:
3342: =over 4
3343:
3344: =item *
3345:
3346: $uname : an internal username (if $cname expecting a course Id specifically)
3347:
3348: =item *
3349:
3350: $udom : a domain (if $cdom expecting a course's domain specifically)
3351:
3352: =item *
3353:
3354: $symb : a resource instance identifier
3355:
3356: =item *
3357:
3358: $namespace : the name of a .db file that contains the data needed or
3359: being set.
3360:
3361: =back
3362:
3363: =head1 INTRODUCTION
3364:
3365: This module provides subroutines which interact with the
3366: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3367: - classes
3368: - users
3369: - resources
3370:
3371: For many of these objects you can also use this to store data about
3372: them or modify them in various ways.
3373:
3374: This is part of the LearningOnline Network with CAPA project
3375: described at http://www.lon-capa.org.
3376:
3377: =head1 RETURN MESSAGES
3378:
3379: =over 4
3380:
3381: =item *
3382:
3383: con_lost : unable to contact remote host
3384:
3385: =item *
3386:
3387: con_delayed : unable to contact remote host, message will be delivered
3388: when the connection is brought back up
3389:
3390: =item *
3391:
3392: con_failed : unable to contact remote host and unable to save message
3393: for later delivery
3394:
3395: =item *
3396:
3397: error: : an error a occured, a description of the error follows the :
3398:
3399: =item *
3400:
3401: no_such_host : unable to fund a host associated with the user/domain
3402: that was requested
3403:
3404: =back
3405:
3406: =head1 PUBLIC SUBROUTINES
3407:
3408: =head2 Session Environment Functions
3409:
3410: =over 4
3411:
3412: =item *
3413:
3414: appenv(%hash) : the value of %hash is written to the user envirnoment
3415: file, and will be restored for each access this user makes during this
3416: session, also modifies the %ENV for the current process
3417:
3418: =item *
3419:
3420: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3421:
3422: =back
3423:
3424: =head2 User Information
3425:
3426: =over 4
3427:
3428: =item *
3429:
3430: queryauthenticate($uname,$udom) : try to determine user's current
3431: authentication scheme
3432:
3433: =item *
3434:
3435: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3436: servers (first use the current one), $upass should be the users password
3437:
3438: =item *
3439:
3440: homeserver($uname,$udom) : find the server which has the user's
3441: directory and files (there must be only one), this caches the answer,
3442: and also caches if there is a borken connection.
3443:
3444: =item *
3445:
3446: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3447: unique resource in a domain, there must be only 1 ID per username, and
3448: only 1 username per ID in a specific domain) (returns hash:
3449: id=>name,id=>name)
3450:
3451: =item *
3452:
3453: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3454: name=>id,name=>id)
3455:
3456: =item *
3457:
3458: idput($udom,%ids) : store away a list of names and associated IDs
3459:
3460: =item *
3461:
3462: rolesinit($udom,$username,$authhost) : get user privileges
3463:
3464: =item *
3465:
3466: usection($udom,$uname,$cname) : finds the section of student in the
3467: course $cname, return section name/number or '' for "not in course"
3468: and '-1' for "no section"
3469:
3470: =item *
3471:
3472: userenvironment($udom,$uname,@what) : gets the values of the keys
3473: passed in @what from the requested user's environment, returns a hash
3474:
3475: =back
3476:
3477: =head2 User Roles
3478:
3479: =over 4
3480:
3481: =item *
3482:
3483: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
3484: actions
3485: F: full access
3486: U,I,K: authentication modes (cxx only)
3487: '': forbidden
3488: 1: user needs to choose course
3489: 2: browse allowed
3490:
3491: =item *
3492:
3493: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
3494: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
3495: and course level
3496:
3497: =item *
3498:
3499: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
3500: explanation of a user role term
3501:
3502: =back
3503:
3504: =head2 User Modification
3505:
3506: =over 4
3507:
3508: =item *
3509:
3510: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
3511: user for the level given by URL. Optional start and end dates (leave empty
3512: string or zero for "no date")
3513:
3514: =item *
3515:
3516: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
3517: change a users, password, possible return values are: ok,
3518: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
3519: refused
3520:
3521: =item *
3522:
3523: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
3524:
3525: =item *
3526:
3527: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
3528: modify user
3529:
3530: =item *
3531:
3532: modifystudent($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,$end,$start) : modify student
3533:
3534: =item *
3535:
3536: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
3537: custom role; give a custom role to a user for the level given by URL. Specify
3538: name and domain of role author, and role name
3539:
3540: =item *
3541:
3542: revokerole($udom,$uname,$url,$role) : revoke a role for url
3543:
3544: =item *
3545:
3546: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
3547:
3548: =back
3549:
3550: =head2 Course Infomation
3551:
3552: =over 4
3553:
3554: =item *
3555:
3556: coursedescription($courseid) : course description
3557:
3558: =item *
3559:
3560: courseresdata($coursenum,$coursedomain,@which) : request for current
3561: parameter setting for a specific course, @what should be a list of
3562: parameters to ask about. This routine caches answers for 5 minutes.
3563:
3564: =back
3565:
3566: =head2 Course Modification
3567:
3568: =over 4
3569:
3570: =item *
3571:
3572: writecoursepref($courseid,%prefs) : write preferences (environment
3573: database) for a course
3574:
3575: =item *
3576:
3577: createcourse($udom,$description,$url) : make/modify course
3578:
3579: =back
3580:
3581: =head2 Resource Subroutines
3582:
3583: =over 4
3584:
3585: =item *
3586:
3587: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
3588:
3589: =item *
3590:
3591: repcopy($filename) : subscribes to the requested file, and attempts to
3592: replicate from the owning library server, Might return
3593: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
3594: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
3595: resource. Expects the local filesystem pathname
3596: (/home/httpd/html/res/....)
3597:
3598: =back
3599:
3600: =head2 Resource Information
3601:
3602: =over 4
3603:
3604: =item *
3605:
3606: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
3607: a vairety of different possible values, $varname should be a request
3608: string, and the other parameters can be used to specify who and what
3609: one is asking about.
3610:
3611: Possible values for $varname are environment.lastname (or other item
3612: from the envirnment hash), user.name (or someother aspect about the
3613: user), resource.0.maxtries (or some other part and parameter of a
3614: resource)
3615:
3616: =item *
3617:
3618: directcondval($number) : get current value of a condition; reads from a state
3619: string
3620:
3621: =item *
3622:
3623: condval($condidx) : value of condition index based on state
3624:
3625: =item *
3626:
3627: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
3628: resource's metadata, $what should be either a specific key, or either
3629: 'keys' (to get a list of possible keys) or 'packages' to get a list of
3630: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
3631:
3632: this function automatically caches all requests
3633:
3634: =item *
3635:
3636: metadata_query($query,$custom,$customshow) : make a metadata query against the
3637: network of library servers; returns file handle of where SQL and regex results
3638: will be stored for query
3639:
3640: =item *
3641:
3642: symbread($filename) : return symbolic list entry (filename argument optional);
3643: returns the data handle
3644:
3645: =item *
3646:
3647: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
3648: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
3649: failure, user must be in a course, as it assumes the existance of the
3650: course initi hash, and uses $ENV('request.course.id'}
3651:
3652:
3653: =item *
3654:
3655: symbclean($symb) : removes versions numbers from a symb, returns the
3656: cleaned symb
3657:
3658: =item *
3659:
3660: is_on_map($uri) : checks if the $uri is somewhere on the current
3661: course map, user must be in a course for it to work.
3662:
3663: =item *
3664:
3665: numval($salt) : return random seed value (addend for rndseed)
3666:
3667: =item *
3668:
3669: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
3670: a random seed, all arguments are optional, if they aren't sent it uses the
3671: environment to derive them. Note: if symb isn't sent and it can't get one
3672: from &symbread it will use the current time as its return value
3673:
3674: =item *
3675:
3676: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
3677: unfakeable, receipt
3678:
3679: =item *
3680:
3681: receipt() : API to ireceipt working off of ENV values; given out to users
3682:
3683: =item *
3684:
3685: countacc($url) : count the number of accesses to a given URL
3686:
3687: =item *
3688:
3689: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
3690:
3691: =item *
3692:
3693: checkin($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 $tcrsid)
3694:
3695: =item *
3696:
3697: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
3698:
3699: =item *
3700:
3701: devalidate($symb) : devalidate temporary spreadsheet calculations,
3702: forcing spreadsheet to reevaluate the resource scores next time.
3703:
3704: =back
3705:
3706: =head2 Storing/Retreiving Data
3707:
3708: =over 4
3709:
3710: =item *
3711:
3712: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
3713: for this url; hashref needs to be given and should be a \%hashname; the
3714: remaining args aren't required and if they aren't passed or are '' they will
3715: be derived from the ENV
3716:
3717: =item *
3718:
3719: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
3720: uses critical subroutine
3721:
3722: =item *
3723:
3724: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
3725: all args are optional
3726:
3727: =item *
3728:
3729: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
3730: works very similar to store/cstore, but all data is stored in a
3731: temporary location and can be reset using tmpreset, $storehash should
3732: be a hash reference, returns nothing on success
3733:
3734: =item *
3735:
3736: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
3737: similar to restore, but all data is stored in a temporary location and
3738: can be reset using tmpreset. Returns a hash of values on success,
3739: error string otherwise.
3740:
3741: =item *
3742:
3743: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
3744: deltes all keys for $symb form the temporary storage hash.
3745:
3746: =item *
3747:
3748: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
3749: reference filled in from namesp ($udom and $uname are optional)
3750:
3751: =item *
3752:
3753: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
3754: namesp ($udom and $uname are optional)
3755:
3756: =item *
3757:
3758: dump($namespace,$udom,$uname,$regexp) :
3759: dumps the complete (or key matching regexp) namespace into a hash
3760: ($udom, $uname and $regexp are optional)
3761:
3762: =item *
3763:
3764: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
3765: ($udom and $uname are optional)
3766:
3767: =item *
3768:
3769: cput($namespace,$storehash,$udom,$uname) : critical put
3770: ($udom and $uname are optional)
3771:
3772: =item *
3773:
3774: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
3775: reference filled in from namesp (encrypts the return communication)
3776: ($udom and $uname are optional)
3777:
3778: =item *
3779:
3780: log($udom,$name,$home,$message) : write to permanent log for user; use
3781: critical subroutine
3782:
3783: =back
3784:
3785: =head2 Network Status Functions
3786:
3787: =over 4
3788:
3789: =item *
3790:
3791: dirlist($uri) : return directory list based on URI
3792:
3793: =item *
3794:
3795: spareserver() : find server with least workload from spare.tab
3796:
3797: =back
3798:
3799: =head2 Apache Request
3800:
3801: =over 4
3802:
3803: =item *
3804:
3805: ssi($url,%hash) : server side include, does a complete request cycle on url to
3806: localhost, posts hash
3807:
3808: =back
3809:
3810: =head2 Data to String to Data
3811:
3812: =over 4
3813:
3814: =item *
3815:
3816: hash2str(%hash) : convert a hash into a string complete with escaping and '='
3817: and '&' separators, supports elements that are arrayrefs and hashrefs
3818:
3819: =item *
3820:
3821: hashref2str($hashref) : convert a hashref into a string complete with
3822: escaping and '=' and '&' separators, supports elements that are
3823: arrayrefs and hashrefs
3824:
3825: =item *
3826:
3827: arrayref2str($arrayref) : convert an arrayref into a string complete
3828: with escaping and '&' separators, supports elements that are arrayrefs
3829: and hashrefs
3830:
3831: =item *
3832:
3833: str2hash($string) : convert string to hash using unescaping and
3834: splitting on '=' and '&', supports elements that are arrayrefs and
3835: hashrefs
3836:
3837: =item *
3838:
3839: str2array($string) : convert string to hash using unescaping and
3840: splitting on '&', supports elements that are arrayrefs and hashrefs
3841:
3842: =back
3843:
3844: =head2 Logging Routines
3845:
3846: =over 4
3847:
3848: These routines allow one to make log messages in the lonnet.log and
3849: lonnet.perm logfiles.
3850:
3851: =item *
3852:
3853: logtouch() : make sure the logfile, lonnet.log, exists
3854:
3855: =item *
3856:
3857: logthis() : append message to the normal lonnet.log file, it gets
3858: preiodically rolled over and deleted.
3859:
3860: =item *
3861:
3862: logperm() : append a permanent message to lonnet.perm.log, this log
3863: file never gets deleted by any automated portion of the system, only
3864: messages of critical importance should go in here.
3865:
3866: =back
3867:
3868: =head2 General File Helper Routines
3869:
3870: =over 4
3871:
3872: =item *
3873:
3874: getfile($file) : returns the entire contents of a file or -1; it
3875: properly subscribes to and replicates the file if neccessary.
3876:
3877: =item *
3878:
3879: filelocation($dir,$file) : returns file system location of a file
3880: based on URI; meant to be "fairly clean" absolute reference, $dir is a
3881: directory that relative $file lookups are to looked in ($dir of /a/dir
3882: and a file of ../bob will become /a/bob)
3883:
3884: =item *
3885:
3886: hreflocation($dir,$file) : returns file system location or a URL; same as
3887: filelocation except for hrefs
3888:
3889: =item *
3890:
3891: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
3892:
3893: =back
3894:
3895: =head2 HTTP Helper Routines
3896:
3897: =over 4
3898:
3899: =item *
3900:
3901: escape() : unpack non-word characters into CGI-compatible hex codes
3902:
3903: =item *
3904:
3905: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
3906:
3907: =back
3908:
3909: =head1 PRIVATE SUBROUTINES
3910:
3911: =head2 Underlying communication routines (Shouldn't call)
3912:
3913: =over 4
3914:
3915: =item *
3916:
3917: subreply() : tries to pass a message to lonc, returns con_lost if incapable
3918:
3919: =item *
3920:
3921: reply() : uses subreply to send a message to remote machine, logs all failures
3922:
3923: =item *
3924:
3925: critical() : passes a critical message to another server; if cannot
3926: get through then place message in connection buffer directory and
3927: returns con_delayed, if incapable of saving message, returns
3928: con_failed
3929:
3930: =item *
3931:
3932: reconlonc() : tries to reconnect lonc client processes.
3933:
3934: =back
3935:
3936: =head2 Resource Access Logging
3937:
3938: =over 4
3939:
3940: =item *
3941:
3942: flushcourselogs() : flush (save) buffer logs and access logs
3943:
3944: =item *
3945:
3946: courselog($what) : save message for course in hash
3947:
3948: =item *
3949:
3950: courseacclog($what) : save message for course using &courselog(). Perform
3951: special processing for specific resource types (problems, exams, quizzes, etc).
3952:
3953: =item *
3954:
3955: goodbye() : flush course logs and log shutting down; it is called in srm.conf
3956: as a PerlChildExitHandler
3957:
3958: =back
3959:
3960: =head2 Other
3961:
3962: =over 4
3963:
3964: =item *
3965:
3966: symblist($mapname,%newhash) : update symbolic storage links
3967:
3968: =back
3969:
3970: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonnet.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / lonnet / perl