File:
[LON-CAPA] /
loncom /
lonnet /
perl /
lonnet.pm
Revision
1.264:
download - view:
text,
annotated -
select for diffs
Thu Aug 8 20:33:50 2002 UTC (21 years, 11 months ago) by
matthew
Branches:
MAIN
CVS tags:
HEAD
Bug 263. Modified &allowed to deal properly with domain coordinator
domains. Modified &createcourse to take another parameter to specify
the server to create a course on. Was using $ENV{'user.home'} for the
course home server.
1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.264 2002/08/08 20:33:50 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 02/27/01 Scott Harrison
51: # 3/2 Gerd Kortemeyer
52: # 3/15,3/19 Scott Harrison
53: # 3/19,3/20 Gerd Kortemeyer
54: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
55: # 5/26,5/28 Gerd Kortemeyer
56: # 5/30 H. K. Ng
57: # 6/1 Gerd Kortemeyer
58: # July Guy Albertelli
59: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
60: # 10/2 Gerd Kortemeyer
61: # 10/5,10/10,11/13,11/15 Scott Harrison
62: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
63: # 12/5 Matthew Hall
64: # 12/5 Guy Albertelli
65: # 12/6,12/7,12/12 Gerd Kortemeyer
66: # 12/18 Scott Harrison
67: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
68: # YEAR=2002
69: # 1/4,2/4,2/7 Gerd Kortemeyer
70: #
71: ###
72:
73: package Apache::lonnet;
74:
75: use strict;
76: use Apache::File;
77: use LWP::UserAgent();
78: use HTTP::Headers;
79: use vars
80: qw(%perlvar %hostname %homecache %badServerCache %hostip %spareid %hostdom
81: %libserv %pr %prp %metacache %packagetab
82: %courselogs %accesshash $processmarker $dumpcount
83: %coursedombuf %coursehombuf %courseresdatacache %domaindescription);
84: use IO::Socket;
85: use GDBM_File;
86: use Apache::Constants qw(:common :http);
87: use HTML::LCParser;
88: use Fcntl qw(:flock);
89: 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: my $path=$docudom.'/'.$docuname.'/';
765: my $filepath=$perlvar{'lonDocRoot'};
766: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
767: my $count;
768: for ($count=4;$count<=$#parts;$count++) {
769: $filepath.="/$parts[$count]";
770: if ((-e $filepath)!=1) {
771: mkdir($filepath,0777);
772: }
773: }
774: # Save the file
775: {
776: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
777: print $fh $ENV{'form.'.$formname};
778: }
779: # Notify homeserver to grep it
780: #
781: if
782: (&reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome) eq 'ok')
783: {
784: #
785: # Return the URL to it
786: return '/uploaded/'.$path.$fname;
787: } else {
788: return '/adm/notfound.html';
789: }
790: }
791:
792: # ------------------------------------------------------------------------- Log
793:
794: sub log {
795: my ($dom,$nam,$hom,$what)=@_;
796: return critical("log:$dom:$nam:$what",$hom);
797: }
798:
799: # ------------------------------------------------------------------ Course Log
800:
801: sub flushcourselogs {
802: &logthis('Flushing course log buffers');
803: foreach (keys %courselogs) {
804: my $crsid=$_;
805: if (&reply('log:'.$coursedombuf{$crsid}.':'.
806: &escape($courselogs{$crsid}),
807: $coursehombuf{$crsid}) eq 'ok') {
808: delete $courselogs{$crsid};
809: } else {
810: &logthis('Failed to flush log buffer for '.$crsid);
811: if (length($courselogs{$crsid})>40000) {
812: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
813: " exceeded maximum size, deleting.</font>");
814: delete $courselogs{$crsid};
815: }
816: }
817: }
818: &logthis('Flushing access logs');
819: foreach (keys %accesshash) {
820: my $entry=$_;
821: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
822: my %temphash=($entry => $accesshash{$entry});
823: if (&Apache::lonnet::put('resevaldata',\%temphash,$1,$2) eq 'ok') {
824: delete $accesshash{$entry};
825: }
826: }
827: $dumpcount++;
828: }
829:
830: sub courselog {
831: my $what=shift;
832: $what=time.':'.$what;
833: unless ($ENV{'request.course.id'}) { return ''; }
834: $coursedombuf{$ENV{'request.course.id'}}=
835: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
836: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
837: $coursehombuf{$ENV{'request.course.id'}}=
838: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
839: if (defined $courselogs{$ENV{'request.course.id'}}) {
840: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
841: } else {
842: $courselogs{$ENV{'request.course.id'}}.=$what;
843: }
844: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
845: &flushcourselogs();
846: }
847: }
848:
849: sub courseacclog {
850: my $fnsymb=shift;
851: unless ($ENV{'request.course.id'}) { return ''; }
852: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
853: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
854: $what.=':POST';
855: foreach (keys %ENV) {
856: if ($_=~/^form\.(.*)/) {
857: $what.=':'.$1.'='.$ENV{$_};
858: }
859: }
860: }
861: &courselog($what);
862: }
863:
864: sub countacc {
865: my $url=&declutter(shift);
866: unless ($ENV{'request.course.id'}) { return ''; }
867: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
868: my $key=$processmarker.'_'.$dumpcount.'___'.$url.'___count';
869: if (defined($accesshash{$key})) {
870: $accesshash{$key}++;
871: } else {
872: $accesshash{$key}=1;
873: }
874: }
875:
876: # ----------------------------------------------------------- Check out an item
877:
878: sub checkout {
879: my ($symb,$tuname,$tudom,$tcrsid)=@_;
880: my $now=time;
881: my $lonhost=$perlvar{'lonHostID'};
882: my $infostr=&escape(
883: 'CHECKOUTTOKEN&'.
884: $tuname.'&'.
885: $tudom.'&'.
886: $tcrsid.'&'.
887: $symb.'&'.
888: $now.'&'.$ENV{'REMOTE_ADDR'});
889: my $token=&reply('tmpput:'.$infostr,$lonhost);
890: if ($token=~/^error\:/) {
891: &logthis("<font color=blue>WARNING: ".
892: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
893: "</font>");
894: return '';
895: }
896:
897: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
898: $token=~tr/a-z/A-Z/;
899:
900: my %infohash=('resource.0.outtoken' => $token,
901: 'resource.0.checkouttime' => $now,
902: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
903:
904: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
905: return '';
906: } else {
907: &logthis("<font color=blue>WARNING: ".
908: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
909: "</font>");
910: }
911:
912: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
913: &escape('Checkout '.$infostr.' - '.
914: $token)) ne 'ok') {
915: return '';
916: } else {
917: &logthis("<font color=blue>WARNING: ".
918: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
919: "</font>");
920: }
921: return $token;
922: }
923:
924: # ------------------------------------------------------------ Check in an item
925:
926: sub checkin {
927: my $token=shift;
928: my $now=time;
929: my ($ta,$tb,$lonhost)=split(/\*/,$token);
930: $lonhost=~tr/A-Z/a-z/;
931: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
932: $dtoken=~s/\W/\_/g;
933: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
934: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
935:
936: unless (($tuname) && ($tudom)) {
937: &logthis('Check in '.$token.' ('.$dtoken.') failed');
938: return '';
939: }
940:
941: unless (&allowed('mgr',$tcrsid)) {
942: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
943: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
944: return '';
945: }
946:
947: my %infohash=('resource.0.intoken' => $token,
948: 'resource.0.checkintime' => $now,
949: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
950:
951: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
952: return '';
953: }
954:
955: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
956: &escape('Checkin - '.$token)) ne 'ok') {
957: return '';
958: }
959:
960: return ($symb,$tuname,$tudom,$tcrsid);
961: }
962:
963: # --------------------------------------------- Set Expire Date for Spreadsheet
964:
965: sub expirespread {
966: my ($uname,$udom,$stype,$usymb)=@_;
967: my $cid=$ENV{'request.course.id'};
968: if ($cid) {
969: my $now=time;
970: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
971: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
972: $ENV{'course.'.$cid.'.num'}.
973: ':nohist_expirationdates:'.
974: &escape($key).'='.$now,
975: $ENV{'course.'.$cid.'.home'})
976: }
977: return 'ok';
978: }
979:
980: # ----------------------------------------------------- Devalidate Spreadsheets
981:
982: sub devalidate {
983: my $symb=shift;
984: my $cid=$ENV{'request.course.id'};
985: if ($cid) {
986: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
987: my $status=
988: &del('nohist_calculatedsheet',
989: [$key.'studentcalc'],
990: $ENV{'course.'.$cid.'.domain'},
991: $ENV{'course.'.$cid.'.num'})
992: .' '.
993: &del('nohist_calculatedsheets_'.$cid,
994: [$key.'assesscalc:'.$symb]);
995: unless ($status eq 'ok ok') {
996: &logthis('Could not devalidate spreadsheet '.
997: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
998: $symb.': '.$status);
999: }
1000: }
1001: }
1002:
1003: sub arrayref2str {
1004: my ($arrayref) = @_;
1005: my $result='_ARRAY_REF__';
1006: foreach my $elem (@$arrayref) {
1007: if (ref($elem) eq 'ARRAY') {
1008: $result.=&escape(&arrayref2str($elem)).'&';
1009: } elsif (ref($elem) eq 'HASH') {
1010: $result.=&escape(&hashref2str($elem)).'&';
1011: } elsif (ref($elem)) {
1012: &logthis("Got a ref of ".(ref($elem))." skipping.");
1013: } else {
1014: $result.=&escape($elem).'&';
1015: }
1016: }
1017: $result=~s/\&$//;
1018: return $result;
1019: }
1020:
1021: sub hash2str {
1022: my (%hash) = @_;
1023: my $result=&hashref2str(\%hash);
1024: $result=~s/^_HASH_REF__//;
1025: return $result;
1026: }
1027:
1028: sub hashref2str {
1029: my ($hashref)=@_;
1030: my $result='_HASH_REF__';
1031: foreach (keys(%$hashref)) {
1032: if (ref($_) eq 'ARRAY') {
1033: $result.=&escape(&arrayref2str($_)).'=';
1034: } elsif (ref($_) eq 'HASH') {
1035: $result.=&escape(&hashref2str($_)).'=';
1036: } elsif (ref($_)) {
1037: &logthis("Got a ref of ".(ref($_))." skipping.");
1038: } else {
1039: $result.=&escape($_).'=';
1040: }
1041:
1042: if (ref($$hashref{$_}) eq 'ARRAY') {
1043: $result.=&escape(&arrayref2str($$hashref{$_})).'&';
1044: } elsif (ref($$hashref{$_}) eq 'HASH') {
1045: $result.=&escape(&hashref2str($$hashref{$_})).'&';
1046: } elsif (ref($$hashref{$_})) {
1047: &logthis("Got a ref of ".(ref($$hashref{$_}))." skipping.");
1048: } else {
1049: $result.=&escape($$hashref{$_}).'&';
1050: }
1051: }
1052: $result=~s/\&$//;
1053: return $result;
1054: }
1055:
1056: sub str2hash {
1057: my ($string) = @_;
1058: my %returnhash;
1059: foreach (split(/\&/,$string)) {
1060: my ($name,$value)=split(/\=/,$_);
1061: $name=&unescape($name);
1062: $value=&unescape($value);
1063: if ($value =~ /^_HASH_REF__/) {
1064: $value =~ s/^_HASH_REF__//;
1065: my %hash=&str2hash($value);
1066: $value=\%hash;
1067: } elsif ($value =~ /^_ARRAY_REF__/) {
1068: $value =~ s/^_ARRAY_REF__//;
1069: my @array=&str2array($value);
1070: $value=\@array;
1071: }
1072: $returnhash{$name}=$value;
1073: }
1074: return (%returnhash);
1075: }
1076:
1077: sub str2array {
1078: my ($string) = @_;
1079: my @returnarray;
1080: foreach my $value (split(/\&/,$string)) {
1081: $value=&unescape($value);
1082: if ($value =~ /^_HASH_REF__/) {
1083: $value =~ s/^_HASH_REF__//;
1084: my %hash=&str2hash($value);
1085: $value=\%hash;
1086: } elsif ($value =~ /^_ARRAY_REF__/) {
1087: $value =~ s/^_ARRAY_REF__//;
1088: my @array=&str2array($value);
1089: $value=\@array;
1090: }
1091: push(@returnarray,$value);
1092: }
1093: return (@returnarray);
1094: }
1095:
1096: # -------------------------------------------------------------------Temp Store
1097:
1098: sub tmpreset {
1099: my ($symb,$namespace,$domain,$stuname) = @_;
1100: if (!$symb) {
1101: $symb=&symbread();
1102: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1103: }
1104: $symb=escape($symb);
1105:
1106: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1107: $namespace=~s/\//\_/g;
1108: $namespace=~s/\W//g;
1109:
1110: #FIXME needs to do something for /pub resources
1111: if (!$domain) { $domain=$ENV{'user.domain'}; }
1112: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1113: my $path=$perlvar{'lonDaemons'}.'/tmp';
1114: my %hash;
1115: if (tie(%hash,'GDBM_File',
1116: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1117: &GDBM_WRCREAT(),0640)) {
1118: foreach my $key (keys %hash) {
1119: if ($key=~ /:$symb/) {
1120: delete($hash{$key});
1121: }
1122: }
1123: }
1124: }
1125:
1126: sub tmpstore {
1127: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1128:
1129: if (!$symb) {
1130: $symb=&symbread();
1131: if (!$symb) { $symb= $ENV{'request.url'}; }
1132: }
1133: $symb=escape($symb);
1134:
1135: if (!$namespace) {
1136: # I don't think we would ever want to store this for a course.
1137: # it seems this will only be used if we don't have a course.
1138: #$namespace=$ENV{'request.course.id'};
1139: #if (!$namespace) {
1140: $namespace=$ENV{'request.state'};
1141: #}
1142: }
1143: $namespace=~s/\//\_/g;
1144: $namespace=~s/\W//g;
1145: #FIXME needs to do something for /pub resources
1146: if (!$domain) { $domain=$ENV{'user.domain'}; }
1147: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1148: my $now=time;
1149: my %hash;
1150: my $path=$perlvar{'lonDaemons'}.'/tmp';
1151: if (tie(%hash,'GDBM_File',
1152: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1153: &GDBM_WRCREAT(),0640)) {
1154: $hash{"version:$symb"}++;
1155: my $version=$hash{"version:$symb"};
1156: my $allkeys='';
1157: foreach my $key (keys(%$storehash)) {
1158: $allkeys.=$key.':';
1159: $hash{"$version:$symb:$key"}=$$storehash{$key};
1160: }
1161: $hash{"$version:$symb:timestamp"}=$now;
1162: $allkeys.='timestamp';
1163: $hash{"$version:keys:$symb"}=$allkeys;
1164: if (untie(%hash)) {
1165: return 'ok';
1166: } else {
1167: return "error:$!";
1168: }
1169: } else {
1170: return "error:$!";
1171: }
1172: }
1173:
1174: # -----------------------------------------------------------------Temp Restore
1175:
1176: sub tmprestore {
1177: my ($symb,$namespace,$domain,$stuname) = @_;
1178:
1179: if (!$symb) {
1180: $symb=&symbread();
1181: if (!$symb) { $symb= $ENV{'request.url'}; }
1182: }
1183: $symb=escape($symb);
1184:
1185: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1186: #FIXME needs to do something for /pub resources
1187: if (!$domain) { $domain=$ENV{'user.domain'}; }
1188: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1189:
1190: my %returnhash;
1191: $namespace=~s/\//\_/g;
1192: $namespace=~s/\W//g;
1193: my %hash;
1194: my $path=$perlvar{'lonDaemons'}.'/tmp';
1195: if (tie(%hash,'GDBM_File',
1196: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1197: &GDBM_READER(),0640)) {
1198: my $version=$hash{"version:$symb"};
1199: $returnhash{'version'}=$version;
1200: my $scope;
1201: for ($scope=1;$scope<=$version;$scope++) {
1202: my $vkeys=$hash{"$scope:keys:$symb"};
1203: my @keys=split(/:/,$vkeys);
1204: my $key;
1205: $returnhash{"$scope:keys"}=$vkeys;
1206: foreach $key (@keys) {
1207: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1208: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1209: }
1210: }
1211: if (!(untie(%hash))) {
1212: return "error:$!";
1213: }
1214: } else {
1215: return "error:$!";
1216: }
1217: return %returnhash;
1218: }
1219:
1220: # ----------------------------------------------------------------------- Store
1221:
1222: sub store {
1223: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1224: my $home='';
1225:
1226: if ($stuname) { $home=&homeserver($stuname,$domain); }
1227:
1228: $symb=&symbclean($symb);
1229: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1230:
1231: &devalidate($symb);
1232:
1233: $symb=escape($symb);
1234: if (!$namespace) {
1235: unless ($namespace=$ENV{'request.course.id'}) {
1236: return '';
1237: }
1238: }
1239: if (!$domain) { $domain=$ENV{'user.domain'}; }
1240: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1241: if (!$home) { $home=$ENV{'user.home'}; }
1242: my $namevalue='';
1243: foreach (keys %$storehash) {
1244: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1245: }
1246: $namevalue=~s/\&$//;
1247: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1248: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1249: }
1250:
1251: # -------------------------------------------------------------- Critical Store
1252:
1253: sub cstore {
1254: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1255: my $home='';
1256:
1257: if ($stuname) { $home=&homeserver($stuname,$domain); }
1258:
1259: $symb=&symbclean($symb);
1260: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1261:
1262: &devalidate($symb);
1263:
1264: $symb=escape($symb);
1265: if (!$namespace) {
1266: unless ($namespace=$ENV{'request.course.id'}) {
1267: return '';
1268: }
1269: }
1270: if (!$domain) { $domain=$ENV{'user.domain'}; }
1271: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1272: if (!$home) { $home=$ENV{'user.home'}; }
1273:
1274: my $namevalue='';
1275: foreach (keys %$storehash) {
1276: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1277: }
1278: $namevalue=~s/\&$//;
1279: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1280: return critical
1281: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1282: }
1283:
1284: # --------------------------------------------------------------------- Restore
1285:
1286: sub restore {
1287: my ($symb,$namespace,$domain,$stuname) = @_;
1288: my $home='';
1289:
1290: if ($stuname) { $home=&homeserver($stuname,$domain); }
1291:
1292: if (!$symb) {
1293: unless ($symb=escape(&symbread())) { return ''; }
1294: } else {
1295: $symb=&escape(&symbclean($symb));
1296: }
1297: if (!$namespace) {
1298: unless ($namespace=$ENV{'request.course.id'}) {
1299: return '';
1300: }
1301: }
1302: if (!$domain) { $domain=$ENV{'user.domain'}; }
1303: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1304: if (!$home) { $home=$ENV{'user.home'}; }
1305: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1306:
1307: my %returnhash=();
1308: foreach (split(/\&/,$answer)) {
1309: my ($name,$value)=split(/\=/,$_);
1310: $returnhash{&unescape($name)}=&unescape($value);
1311: }
1312: my $version;
1313: for ($version=1;$version<=$returnhash{'version'};$version++) {
1314: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1315: $returnhash{$_}=$returnhash{$version.':'.$_};
1316: }
1317: }
1318: return %returnhash;
1319: }
1320:
1321: # ---------------------------------------------------------- Course Description
1322:
1323: sub coursedescription {
1324: my $courseid=shift;
1325: $courseid=~s/^\///;
1326: $courseid=~s/\_/\//g;
1327: my ($cdomain,$cnum)=split(/\//,$courseid);
1328: my $chome=&homeserver($cnum,$cdomain);
1329: if ($chome ne 'no_host') {
1330: my %returnhash=&dump('environment',$cdomain,$cnum);
1331: if (!exists($returnhash{'con_lost'})) {
1332: my $normalid=$cdomain.'_'.$cnum;
1333: my %envhash=();
1334: $returnhash{'home'}= $chome;
1335: $returnhash{'domain'} = $cdomain;
1336: $returnhash{'num'} = $cnum;
1337: while (my ($name,$value) = each %returnhash) {
1338: $envhash{'course.'.$normalid.'.'.$name}=$value;
1339: }
1340: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1341: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1342: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1343: $envhash{'course.'.$normalid.'.last_cache'}=time;
1344: $envhash{'course.'.$normalid.'.home'}=$chome;
1345: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1346: $envhash{'course.'.$normalid.'.num'}=$cnum;
1347: &appenv(%envhash);
1348: return %returnhash;
1349: }
1350: }
1351: return ();
1352: }
1353:
1354: # -------------------------------------------------------- Get user privileges
1355:
1356: sub rolesinit {
1357: my ($domain,$username,$authhost)=@_;
1358: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1359: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1360: my %allroles=();
1361: my %thesepriv=();
1362: my $now=time;
1363: my $userroles="user.login.time=$now\n";
1364: my $thesestr;
1365:
1366: if ($rolesdump ne '') {
1367: foreach (split(/&/,$rolesdump)) {
1368: if ($_!~/^rolesdef\&/) {
1369: my ($area,$role)=split(/=/,$_);
1370: $area=~s/\_\w\w$//;
1371: my ($trole,$tend,$tstart)=split(/_/,$role);
1372: $userroles.='user.role.'.$trole.'.'.$area.'='.
1373: $tstart.'.'.$tend."\n";
1374: if ($tend!=0) {
1375: if ($tend<$now) {
1376: $trole='';
1377: }
1378: }
1379: if ($tstart!=0) {
1380: if ($tstart>$now) {
1381: $trole='';
1382: }
1383: }
1384: if (($area ne '') && ($trole ne '')) {
1385: my $spec=$trole.'.'.$area;
1386: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1387: if ($trole =~ /^cr\//) {
1388: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1389: my $homsvr=homeserver($rauthor,$rdomain);
1390: if ($hostname{$homsvr} ne '') {
1391: my $roledef=
1392: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1393: $homsvr);
1394: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1395: my ($syspriv,$dompriv,$coursepriv)=
1396: split(/\_/,unescape($roledef));
1397: $allroles{'cm./'}.=':'.$syspriv;
1398: $allroles{$spec.'./'}.=':'.$syspriv;
1399: if ($tdomain ne '') {
1400: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1401: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1402: if ($trest ne '') {
1403: $allroles{'cm.'.$area}.=':'.$coursepriv;
1404: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1405: }
1406: }
1407: }
1408: }
1409: } else {
1410: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1411: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1412: if ($tdomain ne '') {
1413: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1414: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1415: if ($trest ne '') {
1416: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1417: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1418: }
1419: }
1420: }
1421: }
1422: }
1423: }
1424: my $adv=0;
1425: my $author=0;
1426: foreach (keys %allroles) {
1427: %thesepriv=();
1428: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1429: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1430: foreach (split(/:/,$allroles{$_})) {
1431: if ($_ ne '') {
1432: my ($privilege,$restrictions)=split(/&/,$_);
1433: if ($restrictions eq '') {
1434: $thesepriv{$privilege}='F';
1435: } else {
1436: if ($thesepriv{$privilege} ne 'F') {
1437: $thesepriv{$privilege}.=$restrictions;
1438: }
1439: }
1440: }
1441: }
1442: $thesestr='';
1443: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1444: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1445: }
1446: $userroles.='user.adv='.$adv."\n".
1447: 'user.author='.$author."\n";
1448: $ENV{'user.adv'}=$adv;
1449: }
1450: return $userroles;
1451: }
1452:
1453: # --------------------------------------------------------------- get interface
1454:
1455: sub get {
1456: my ($namespace,$storearr,$udomain,$uname)=@_;
1457: my $items='';
1458: foreach (@$storearr) {
1459: $items.=escape($_).'&';
1460: }
1461: $items=~s/\&$//;
1462: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1463: if (!$uname) { $uname=$ENV{'user.name'}; }
1464: my $uhome=&homeserver($uname,$udomain);
1465:
1466: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1467: my @pairs=split(/\&/,$rep);
1468: my %returnhash=();
1469: my $i=0;
1470: foreach (@$storearr) {
1471: $returnhash{$_}=unescape($pairs[$i]);
1472: $i++;
1473: }
1474: return %returnhash;
1475: }
1476:
1477: # --------------------------------------------------------------- del interface
1478:
1479: sub del {
1480: my ($namespace,$storearr,$udomain,$uname)=@_;
1481: my $items='';
1482: foreach (@$storearr) {
1483: $items.=escape($_).'&';
1484: }
1485: $items=~s/\&$//;
1486: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1487: if (!$uname) { $uname=$ENV{'user.name'}; }
1488: my $uhome=&homeserver($uname,$udomain);
1489:
1490: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1491: }
1492:
1493: # -------------------------------------------------------------- dump interface
1494:
1495: sub dump {
1496: my ($namespace,$udomain,$uname,$regexp)=@_;
1497: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1498: if (!$uname) { $uname=$ENV{'user.name'}; }
1499: my $uhome=&homeserver($uname,$udomain);
1500: if ($regexp) {
1501: $regexp=&escape($regexp);
1502: } else {
1503: $regexp='.';
1504: }
1505: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1506: my @pairs=split(/\&/,$rep);
1507: my %returnhash=();
1508: foreach (@pairs) {
1509: my ($key,$value)=split(/=/,$_);
1510: $returnhash{unescape($key)}=unescape($value);
1511: }
1512: return %returnhash;
1513: }
1514:
1515: # --------------------------------------------------------------- put interface
1516:
1517: sub put {
1518: my ($namespace,$storehash,$udomain,$uname)=@_;
1519: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1520: if (!$uname) { $uname=$ENV{'user.name'}; }
1521: my $uhome=&homeserver($uname,$udomain);
1522: my $items='';
1523: foreach (keys %$storehash) {
1524: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1525: }
1526: $items=~s/\&$//;
1527: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1528: }
1529:
1530: # ------------------------------------------------------ critical put interface
1531:
1532: sub cput {
1533: my ($namespace,$storehash,$udomain,$uname)=@_;
1534: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1535: if (!$uname) { $uname=$ENV{'user.name'}; }
1536: my $uhome=&homeserver($uname,$udomain);
1537: my $items='';
1538: foreach (keys %$storehash) {
1539: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1540: }
1541: $items=~s/\&$//;
1542: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1543: }
1544:
1545: # -------------------------------------------------------------- eget interface
1546:
1547: sub eget {
1548: my ($namespace,$storearr,$udomain,$uname)=@_;
1549: my $items='';
1550: foreach (@$storearr) {
1551: $items.=escape($_).'&';
1552: }
1553: $items=~s/\&$//;
1554: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1555: if (!$uname) { $uname=$ENV{'user.name'}; }
1556: my $uhome=&homeserver($uname,$udomain);
1557: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1558: my @pairs=split(/\&/,$rep);
1559: my %returnhash=();
1560: my $i=0;
1561: foreach (@$storearr) {
1562: $returnhash{$_}=unescape($pairs[$i]);
1563: $i++;
1564: }
1565: return %returnhash;
1566: }
1567:
1568: # ------------------------------------------------- Check for a user privilege
1569:
1570: sub allowed {
1571: my ($priv,$uri)=@_;
1572:
1573: my $orguri=$uri;
1574: $uri=&declutter($uri);
1575:
1576: # Free bre access to adm and meta resources
1577:
1578: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1579: return 'F';
1580: }
1581:
1582: # Free bre to public access
1583:
1584: if ($priv eq 'bre') {
1585: my $copyright=&metadata($uri,'copyright');
1586: if ($copyright eq 'public') { return 'F'; }
1587: if ($copyright eq 'priv') {
1588: $uri=~/([^\/]+)\/([^\/]+)\//;
1589: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
1590: return '';
1591: }
1592: }
1593: if ($copyright eq 'domain') {
1594: $uri=~/([^\/]+)\/([^\/]+)\//;
1595: unless (($ENV{'user.domain'} eq $1) ||
1596: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
1597: return '';
1598: }
1599: }
1600: if ($ENV{'request.role'}=~ /li\.\//) {
1601: # Library role, so allow browsing of resources in this domain.
1602: return 'F';
1603: }
1604: }
1605: # Domain coordinator is trying to create a course
1606: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
1607: # uri is the requested domain in this case.
1608: # comparison to 'request.role.domain' shows if the user has selected
1609: # a role of dc for the domain in question.
1610: return 'F' if ($uri eq $ENV{'request.role.domain'});
1611: }
1612:
1613: my $thisallowed='';
1614: my $statecond=0;
1615: my $courseprivid='';
1616:
1617: # Course
1618:
1619: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1620: $thisallowed.=$1;
1621: }
1622:
1623: # Domain
1624:
1625: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1626: =~/$priv\&([^\:]*)/) {
1627: $thisallowed.=$1;
1628: }
1629:
1630: # Course: uri itself is a course
1631: my $courseuri=$uri;
1632: $courseuri=~s/\_(\d)/\/$1/;
1633: $courseuri=~s/^([^\/])/\/$1/;
1634:
1635: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1636: =~/$priv\&([^\:]*)/) {
1637: $thisallowed.=$1;
1638: }
1639:
1640: # Full access at system, domain or course-wide level? Exit.
1641:
1642: if ($thisallowed=~/F/) {
1643: return 'F';
1644: }
1645:
1646: # If this is generating or modifying users, exit with special codes
1647:
1648: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1649: return $thisallowed;
1650: }
1651: #
1652: # Gathered so far: system, domain and course wide privileges
1653: #
1654: # Course: See if uri or referer is an individual resource that is part of
1655: # the course
1656:
1657: if ($ENV{'request.course.id'}) {
1658:
1659: $courseprivid=$ENV{'request.course.id'};
1660: if ($ENV{'request.course.sec'}) {
1661: $courseprivid.='/'.$ENV{'request.course.sec'};
1662: }
1663: $courseprivid=~s/\_/\//;
1664: my $checkreferer=1;
1665: my ($match,$cond)=&is_on_map($uri);
1666: if ($match) {
1667: $statecond=$cond;
1668: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1669: =~/$priv\&([^\:]*)/) {
1670: $thisallowed.=$1;
1671: $checkreferer=0;
1672: }
1673: }
1674:
1675: if ($checkreferer) {
1676: my $refuri=$ENV{'httpref.'.$orguri};
1677: unless ($refuri) {
1678: foreach (keys %ENV) {
1679: if ($_=~/^httpref\..*\*/) {
1680: my $pattern=$_;
1681: $pattern=~s/^httpref\.\/res\///;
1682: $pattern=~s/\*/\[\^\/\]\+/g;
1683: $pattern=~s/\//\\\//g;
1684: if ($orguri=~/$pattern/) {
1685: $refuri=$ENV{$_};
1686: }
1687: }
1688: }
1689: }
1690:
1691: if ($refuri) {
1692: $refuri=&declutter($refuri);
1693: my ($match,$cond)=&is_on_map($refuri);
1694: if ($match) {
1695: my $refstatecond=$cond;
1696: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1697: =~/$priv\&([^\:]*)/) {
1698: $thisallowed.=$1;
1699: $uri=$refuri;
1700: $statecond=$refstatecond;
1701: }
1702: }
1703: }
1704: }
1705: }
1706:
1707: #
1708: # Gathered now: all privileges that could apply, and condition number
1709: #
1710: #
1711: # Full or no access?
1712: #
1713:
1714: if ($thisallowed=~/F/) {
1715: return 'F';
1716: }
1717:
1718: unless ($thisallowed) {
1719: return '';
1720: }
1721:
1722: # Restrictions exist, deal with them
1723: #
1724: # C:according to course preferences
1725: # R:according to resource settings
1726: # L:unless locked
1727: # X:according to user session state
1728: #
1729:
1730: # Possibly locked functionality, check all courses
1731: # Locks might take effect only after 10 minutes cache expiration for other
1732: # courses, and 2 minutes for current course
1733:
1734: my $envkey;
1735: if ($thisallowed=~/L/) {
1736: foreach $envkey (keys %ENV) {
1737: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1738: my $courseid=$2;
1739: my $roleid=$1.'.'.$2;
1740: $courseid=~s/^\///;
1741: my $expiretime=600;
1742: if ($ENV{'request.role'} eq $roleid) {
1743: $expiretime=120;
1744: }
1745: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1746: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1747: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1748: &coursedescription($courseid);
1749: }
1750: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1751: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1752: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1753: &log($ENV{'user.domain'},$ENV{'user.name'},
1754: $ENV{'user.home'},
1755: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1756: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1757: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1758: return '';
1759: }
1760: }
1761: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1762: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1763: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1764: &log($ENV{'user.domain'},$ENV{'user.name'},
1765: $ENV{'user.home'},
1766: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1767: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1768: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1769: return '';
1770: }
1771: }
1772: }
1773: }
1774: }
1775:
1776: #
1777: # Rest of the restrictions depend on selected course
1778: #
1779:
1780: unless ($ENV{'request.course.id'}) {
1781: return '1';
1782: }
1783:
1784: #
1785: # Now user is definitely in a course
1786: #
1787:
1788:
1789: # Course preferences
1790:
1791: if ($thisallowed=~/C/) {
1792: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1793: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
1794: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1795: =~/$rolecode/) {
1796: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1797: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1798: $ENV{'request.course.id'});
1799: return '';
1800: }
1801:
1802: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
1803: =~/$unamedom/) {
1804: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1805: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
1806: $ENV{'request.course.id'});
1807: return '';
1808: }
1809: }
1810:
1811: # Resource preferences
1812:
1813: if ($thisallowed=~/R/) {
1814: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1815: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1816: if (-e $filename) {
1817: my @content;
1818: {
1819: my $fh=Apache::File->new($filename);
1820: @content=<$fh>;
1821: }
1822: if (join('',@content)=~
1823: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1824: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1825: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1826: return '';
1827:
1828: }
1829: }
1830: }
1831:
1832: # Restricted by state or randomout?
1833:
1834: if ($thisallowed=~/X/) {
1835: if ($ENV{'acc.randomout'}) {
1836: my $symb=&symbread($uri,1);
1837: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
1838: return '';
1839: }
1840: }
1841: if (&condval($statecond)) {
1842: return '2';
1843: } else {
1844: return '';
1845: }
1846: }
1847:
1848: return 'F';
1849: }
1850:
1851: # --------------------------------------------------- Is a resource on the map?
1852:
1853: sub is_on_map {
1854: my $uri=&declutter(shift);
1855: my @uriparts=split(/\//,$uri);
1856: my $filename=$uriparts[$#uriparts];
1857: my $pathname=$uri;
1858: $pathname=~s/\/$filename$//;
1859: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1860: /\&$filename\:([\d\|]+)\&/);
1861: if ($match) {
1862: return (1,$1);
1863: } else {
1864: return (0,0);
1865: }
1866: }
1867:
1868: # ----------------------------------------------------------------- Define Role
1869:
1870: sub definerole {
1871: if (allowed('mcr','/')) {
1872: my ($rolename,$sysrole,$domrole,$courole)=@_;
1873: foreach (split('/',$sysrole)) {
1874: my ($crole,$cqual)=split(/\&/,$_);
1875: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1876: if ($pr{'cr:s'}=~/$crole\&/) {
1877: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1878: return "refused:s:$crole&$cqual";
1879: }
1880: }
1881: }
1882: foreach (split('/',$domrole)) {
1883: my ($crole,$cqual)=split(/\&/,$_);
1884: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1885: if ($pr{'cr:d'}=~/$crole\&/) {
1886: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1887: return "refused:d:$crole&$cqual";
1888: }
1889: }
1890: }
1891: foreach (split('/',$courole)) {
1892: my ($crole,$cqual)=split(/\&/,$_);
1893: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1894: if ($pr{'cr:c'}=~/$crole\&/) {
1895: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1896: return "refused:c:$crole&$cqual";
1897: }
1898: }
1899: }
1900: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1901: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1902: "rolesdef_$rolename=".
1903: escape($sysrole.'_'.$domrole.'_'.$courole);
1904: return reply($command,$ENV{'user.home'});
1905: } else {
1906: return 'refused';
1907: }
1908: }
1909:
1910: # ---------------- Make a metadata query against the network of library servers
1911:
1912: sub metadata_query {
1913: my ($query,$custom,$customshow,$server_array)=@_;
1914: my %rhash;
1915: my @server_list = (defined($server_array) ? @$server_array
1916: : keys(%libserv) );
1917: for my $server (@server_list) {
1918: unless ($custom or $customshow) {
1919: my $reply=&reply("querysend:".&escape($query),$server);
1920: $rhash{$server}=$reply;
1921: }
1922: else {
1923: my $reply=&reply("querysend:".&escape($query).':'.
1924: &escape($custom).':'.&escape($customshow),
1925: $server);
1926: $rhash{$server}=$reply;
1927: }
1928: }
1929: return \%rhash;
1930: }
1931:
1932: # ----------------------------------------- Send log queries and wait for reply
1933:
1934: sub log_query {
1935: my ($uname,$udom,$query,%filters)=@_;
1936: my $uhome=&homeserver($uname,$udom);
1937: if ($uhome eq 'no_host') { return 'error: no_host'; }
1938: my $uhost=$hostname{$uhome};
1939: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
1940: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
1941: $uhome);
1942: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
1943: return get_query_reply($queryid);
1944: }
1945:
1946: sub get_query_reply {
1947: my $queryid=shift;
1948: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
1949: my $reply='';
1950: for (1..100) {
1951: sleep 2;
1952: if (-e $replyfile.'.end') {
1953: if (my $fh=Apache::File->new($replyfile)) {
1954: $reply.=<$fh>;
1955: $fh->close;
1956: } else { return 'error: reply_file_error'; }
1957: return &unescape($reply);
1958: }
1959: }
1960: return 'timeout:'.$queryid;
1961: }
1962:
1963: sub courselog_query {
1964: #
1965: # possible filters:
1966: # url: url or symb
1967: # username
1968: # domain
1969: # action: view, submit, grade
1970: # start: timestamp
1971: # end: timestamp
1972: #
1973: my (%filters)=@_;
1974: unless ($ENV{'request.course.id'}) { return 'no_course'; }
1975: if ($filters{'url'}) {
1976: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
1977: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
1978: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
1979: }
1980: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1981: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1982: return &log_query($cname,$cdom,'courselog',%filters);
1983: }
1984:
1985: sub userlog_query {
1986: my ($uname,$udom,%filters)=@_;
1987: return &log_query($uname,$udom,'userlog',%filters);
1988: }
1989:
1990: # ------------------------------------------------------------------ Plain Text
1991:
1992: sub plaintext {
1993: my $short=shift;
1994: return $prp{$short};
1995: }
1996:
1997: # ----------------------------------------------------------------- Assign Role
1998:
1999: sub assignrole {
2000: my ($udom,$uname,$url,$role,$end,$start)=@_;
2001: my $mrole;
2002: if ($role =~ /^cr\//) {
2003: unless (&allowed('ccr',$url)) {
2004: &logthis('Refused custom assignrole: '.
2005: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2006: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2007: return 'refused';
2008: }
2009: $mrole='cr';
2010: } else {
2011: my $cwosec=$url;
2012: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2013: unless (&allowed('c'.$role,$cwosec)) {
2014: &logthis('Refused assignrole: '.
2015: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2016: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2017: return 'refused';
2018: }
2019: $mrole=$role;
2020: }
2021: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2022: "$udom:$uname:$url".'_'."$mrole=$role";
2023: if ($end) { $command.='_'.$end; }
2024: if ($start) {
2025: if ($end) {
2026: $command.='_'.$start;
2027: } else {
2028: $command.='_0_'.$start;
2029: }
2030: }
2031: return &reply($command,&homeserver($uname,$udom));
2032: }
2033:
2034: # -------------------------------------------------- Modify user authentication
2035: # Overrides without validation
2036:
2037: sub modifyuserauth {
2038: my ($udom,$uname,$umode,$upass)=@_;
2039: my $uhome=&homeserver($uname,$udom);
2040: unless (&allowed('mau',$udom)) { return 'refused'; }
2041: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2042: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
2043: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2044: &escape($upass),$uhome);
2045: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2046: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2047: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2048: &log($udom,,$uname,$uhome,
2049: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2050: $ENV{'user.name'}.', '.$umode.
2051: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2052: unless ($reply eq 'ok') {
2053: &logthis('Authentication mode error: '.$reply);
2054: return 'error: '.$reply;
2055: }
2056: return 'ok';
2057: }
2058:
2059: # --------------------------------------------------------------- Modify a user
2060:
2061: sub modifyuser {
2062: my ($udom, $uname, $uid,
2063: $umode, $upass, $first,
2064: $middle, $last, $gene,
2065: $forceid, $desiredhome)=@_;
2066: $udom=~s/\W//g;
2067: $uname=~s/\W//g;
2068: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2069: $umode.', '.$first.', '.$middle.', '.
2070: $last.', '.$gene.'(forceid: '.$forceid.')'.
2071: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2072: ' desiredhome not specified').
2073: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
2074: my $uhome=&homeserver($uname,$udom,'true');
2075: # ----------------------------------------------------------------- Create User
2076: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2077: my $unhome='';
2078: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2079: $unhome = $desiredhome;
2080: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2081: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2082: } else { # load balancing routine for determining $unhome
2083: my $tryserver;
2084: my $loadm=10000000;
2085: foreach $tryserver (keys %libserv) {
2086: if ($hostdom{$tryserver} eq $udom) {
2087: my $answer=reply('load',$tryserver);
2088: if (($answer=~/\d+/) && ($answer<$loadm)) {
2089: $loadm=$answer;
2090: $unhome=$tryserver;
2091: }
2092: }
2093: }
2094: }
2095: if (($unhome eq '') || ($unhome eq 'no_host')) {
2096: return 'error: unable to find a home server for '.$uname.
2097: ' in domain '.$udom;
2098: }
2099: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2100: &escape($upass),$unhome);
2101: unless ($reply eq 'ok') {
2102: return 'error: '.$reply;
2103: }
2104: $uhome=&homeserver($uname,$udom,'true');
2105: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2106: return 'error: verify home';
2107: }
2108: } # End of creation of new user
2109: # ---------------------------------------------------------------------- Add ID
2110: if ($uid) {
2111: $uid=~tr/A-Z/a-z/;
2112: my %uidhash=&idrget($udom,$uname);
2113: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2114: && (!$forceid)) {
2115: unless ($uid eq $uidhash{$uname}) {
2116: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2117: }
2118: } else {
2119: &idput($udom,($uname => $uid));
2120: }
2121: }
2122: # -------------------------------------------------------------- Add names, etc
2123: my %names=&get('environment',
2124: ['firstname','middlename','lastname','generation'],
2125: $udom,$uname);
2126: if ($names{'firstname'} =~ m/^error:.*/) { %names=(); }
2127: if ($first) { $names{'firstname'} = $first; }
2128: if ($middle) { $names{'middlename'} = $middle; }
2129: if ($last) { $names{'lastname'} = $last; }
2130: if ($gene) { $names{'generation'} = $gene; }
2131: my $reply = &put('environment', \%names, $udom,$uname);
2132: if ($reply ne 'ok') { return 'error: '.$reply; }
2133: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2134: $umode.', '.$first.', '.$middle.', '.
2135: $last.', '.$gene.' by '.
2136: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2137: return 'ok';
2138: }
2139:
2140: # -------------------------------------------------------------- Modify student
2141:
2142: sub modifystudent {
2143: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2144: $end,$start,$forceid,$desiredhome)=@_;
2145: my $cid='';
2146: unless ($cid=$ENV{'request.course.id'}) {
2147: return 'not_in_class';
2148: }
2149: # --------------------------------------------------------------- Make the user
2150: my $reply=&modifyuser
2151: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2152: $desiredhome);
2153: unless ($reply eq 'ok') { return $reply; }
2154: my $uhome=&homeserver($uname,$udom);
2155: if (($uhome eq '') || ($uhome eq 'no_host')) {
2156: return 'error: no such user';
2157: }
2158: # -------------------------------------------------- Add student to course list
2159: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2160: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2161: &escape($uname.':'.$udom).'='.
2162: &escape($end.':'.$start),
2163: $ENV{'course.'.$cid.'.home'});
2164: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2165: return 'error: '.$reply;
2166: }
2167: # ---------------------------------------------------- Add student role to user
2168: my $uurl='/'.$cid;
2169: $uurl=~s/\_/\//g;
2170: if ($usec) {
2171: $uurl.='/'.$usec;
2172: }
2173: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2174: }
2175:
2176: # ------------------------------------------------- Write to course preferences
2177:
2178: sub writecoursepref {
2179: my ($courseid,%prefs)=@_;
2180: $courseid=~s/^\///;
2181: $courseid=~s/\_/\//g;
2182: my ($cdomain,$cnum)=split(/\//,$courseid);
2183: my $chome=homeserver($cnum,$cdomain);
2184: if (($chome eq '') || ($chome eq 'no_host')) {
2185: return 'error: no such course';
2186: }
2187: my $cstring='';
2188: foreach (keys %prefs) {
2189: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2190: }
2191: $cstring=~s/\&$//;
2192: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2193: }
2194:
2195: # ---------------------------------------------------------- Make/modify course
2196:
2197: sub createcourse {
2198: my ($udom,$description,$url,$course_server)=@_;
2199: $url=&declutter($url);
2200: my $cid='';
2201: unless (&allowed('ccc',$udom)) {
2202: return 'refused';
2203: }
2204: # ------------------------------------------------------------------- Create ID
2205: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2206: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2207: # ----------------------------------------------- Make sure that does not exist
2208: my $uhome=&homeserver($uname,$udom,'true');
2209: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2210: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2211: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2212: $uhome=&homeserver($uname,$udom,'true');
2213: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2214: return 'error: unable to generate unique course-ID';
2215: }
2216: }
2217: # ------------------------------------------------ Check supplied server name
2218: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2219: if (! exists($libserv{$course_server})) {
2220: return 'error:bad server name '.$course_server;
2221: }
2222: # ------------------------------------------------------------- Make the course
2223: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2224: $course_server);
2225: unless ($reply eq 'ok') { return 'error: '.$reply; }
2226: $uhome=&homeserver($uname,$udom,'true');
2227: if (($uhome eq '') || ($uhome eq 'no_host')) {
2228: return 'error: no such course';
2229: }
2230: &writecoursepref($udom.'_'.$uname,
2231: ('description' => $description,
2232: 'url' => $url));
2233: return '/'.$udom.'/'.$uname;
2234: }
2235:
2236: # ---------------------------------------------------------- Assign Custom Role
2237:
2238: sub assigncustomrole {
2239: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2240: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2241: $end,$start);
2242: }
2243:
2244: # ----------------------------------------------------------------- Revoke Role
2245:
2246: sub revokerole {
2247: my ($udom,$uname,$url,$role)=@_;
2248: my $now=time;
2249: return &assignrole($udom,$uname,$url,$role,$now);
2250: }
2251:
2252: # ---------------------------------------------------------- Revoke Custom Role
2253:
2254: sub revokecustomrole {
2255: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2256: my $now=time;
2257: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2258: }
2259:
2260: # ------------------------------------------------------------ Directory lister
2261:
2262: sub dirlist {
2263: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2264:
2265: $uri=~s/^\///;
2266: $uri=~s/\/$//;
2267: my ($udom, $uname);
2268: (undef,$udom,$uname)=split(/\//,$uri);
2269: if(defined($userdomain)) {
2270: $udom = $userdomain;
2271: }
2272: if(defined($username)) {
2273: $uname = $username;
2274: }
2275:
2276: my $dirRoot = $perlvar{'lonDocRoot'};
2277: if(defined($alternateDirectoryRoot)) {
2278: $dirRoot = $alternateDirectoryRoot;
2279: $dirRoot =~ s/\/$//;
2280: }
2281:
2282: if($udom) {
2283: if($uname) {
2284: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2285: homeserver($uname,$udom));
2286: return split(/:/,$listing);
2287: } elsif(!defined($alternateDirectoryRoot)) {
2288: my $tryserver;
2289: my %allusers=();
2290: foreach $tryserver (keys %libserv) {
2291: if($hostdom{$tryserver} eq $udom) {
2292: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2293: $udom, $tryserver);
2294: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2295: && ($listing ne 'con_lost')) {
2296: foreach (split(/:/,$listing)) {
2297: my ($entry,@stat)=split(/&/,$_);
2298: $allusers{$entry}=1;
2299: }
2300: }
2301: }
2302: }
2303: my $alluserstr='';
2304: foreach (sort keys %allusers) {
2305: $alluserstr.=$_.'&user:';
2306: }
2307: $alluserstr=~s/:$//;
2308: return split(/:/,$alluserstr);
2309: } else {
2310: my @emptyResults = ();
2311: push(@emptyResults, 'missing user name');
2312: return split(':',@emptyResults);
2313: }
2314: } elsif(!defined($alternateDirectoryRoot)) {
2315: my $tryserver;
2316: my %alldom=();
2317: foreach $tryserver (keys %libserv) {
2318: $alldom{$hostdom{$tryserver}}=1;
2319: }
2320: my $alldomstr='';
2321: foreach (sort keys %alldom) {
2322: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2323: }
2324: $alldomstr=~s/:$//;
2325: return split(/:/,$alldomstr);
2326: } else {
2327: my @emptyResults = ();
2328: push(@emptyResults, 'missing domain');
2329: return split(':',@emptyResults);
2330: }
2331: }
2332:
2333: # -------------------------------------------------------- Value of a Condition
2334:
2335: sub directcondval {
2336: my $number=shift;
2337: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2338: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2339: } else {
2340: return 2;
2341: }
2342: }
2343:
2344: sub condval {
2345: my $condidx=shift;
2346: my $result=0;
2347: my $allpathcond='';
2348: foreach (split(/\|/,$condidx)) {
2349: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2350: $allpathcond.=
2351: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2352: }
2353: }
2354: $allpathcond=~s/\|$//;
2355: if ($ENV{'request.course.id'}) {
2356: if ($allpathcond) {
2357: my $operand='|';
2358: my @stack;
2359: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2360: if ($_ eq '(') {
2361: push @stack,($operand,$result)
2362: } elsif ($_ eq ')') {
2363: my $before=pop @stack;
2364: if (pop @stack eq '&') {
2365: $result=$result>$before?$before:$result;
2366: } else {
2367: $result=$result>$before?$result:$before;
2368: }
2369: } elsif (($_ eq '&') || ($_ eq '|')) {
2370: $operand=$_;
2371: } else {
2372: my $new=directcondval($_);
2373: if ($operand eq '&') {
2374: $result=$result>$new?$new:$result;
2375: } else {
2376: $result=$result>$new?$result:$new;
2377: }
2378: }
2379: }
2380: }
2381: }
2382: return $result;
2383: }
2384:
2385: # --------------------------------------------------- Course Resourcedata Query
2386:
2387: sub courseresdata {
2388: my ($coursenum,$coursedomain,@which)=@_;
2389: my $coursehom=&homeserver($coursenum,$coursedomain);
2390: my $hashid=$coursenum.':'.$coursedomain;
2391: my $dodump=0;
2392: if (!defined($courseresdatacache{$hashid.'.time'})) {
2393: $dodump=1;
2394: } else {
2395: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2396: }
2397: if ($dodump) {
2398: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2399: my ($tmp) = keys(%dumpreply);
2400: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2401: $courseresdatacache{$hashid.'.time'}=time;
2402: $courseresdatacache{$hashid}=\%dumpreply;
2403: }
2404: }
2405: foreach my $item (@which) {
2406: if ($courseresdatacache{$hashid}->{$item}) {
2407: return $courseresdatacache{$hashid}->{$item};
2408: }
2409: }
2410: return '';
2411: }
2412:
2413: # --------------------------------------------------------- Value of a Variable
2414:
2415: sub EXT {
2416: my ($varname,$symbparm,$udom,$uname)=@_;
2417:
2418: unless ($varname) { return ''; }
2419:
2420: #get real user name/domain, courseid and symb
2421: my $courseid;
2422: if (!($uname && $udom)) {
2423: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2424: if (!$symbparm) { $symbparm=$cursymb; }
2425: } else {
2426: $courseid=$ENV{'request.course.id'};
2427: }
2428:
2429: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2430: my $rest;
2431: if ($therest[0]) {
2432: $rest=join('.',@therest);
2433: } else {
2434: $rest='';
2435: }
2436: my $qualifierrest=$qualifier;
2437: if ($rest) { $qualifierrest.='.'.$rest; }
2438: my $spacequalifierrest=$space;
2439: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2440: if ($realm eq 'user') {
2441: # --------------------------------------------------------------- user.resource
2442: if ($space eq 'resource') {
2443: my %restored=&restore(undef,undef,$udom,$uname);
2444: return $restored{$qualifierrest};
2445: # ----------------------------------------------------------------- user.access
2446: } elsif ($space eq 'access') {
2447: # FIXME - not supporting calls for a specific user
2448: return &allowed($qualifier,$rest);
2449: # ------------------------------------------ user.preferences, user.environment
2450: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2451: if (($uname eq $ENV{'user.name'}) &&
2452: ($udom eq $ENV{'user.domain'})) {
2453: return $ENV{join('.',('environment',$qualifierrest))};
2454: } else {
2455: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2456: return $returnhash{$qualifierrest};
2457: }
2458: # ----------------------------------------------------------------- user.course
2459: } elsif ($space eq 'course') {
2460: # FIXME - not supporting calls for a specific user
2461: return $ENV{join('.',('request.course',$qualifier))};
2462: # ------------------------------------------------------------------- user.role
2463: } elsif ($space eq 'role') {
2464: # FIXME - not supporting calls for a specific user
2465: my ($role,$where)=split(/\./,$ENV{'request.role'});
2466: if ($qualifier eq 'value') {
2467: return $role;
2468: } elsif ($qualifier eq 'extent') {
2469: return $where;
2470: }
2471: # ----------------------------------------------------------------- user.domain
2472: } elsif ($space eq 'domain') {
2473: return $udom;
2474: # ------------------------------------------------------------------- user.name
2475: } elsif ($space eq 'name') {
2476: return $uname;
2477: # ---------------------------------------------------- Any other user namespace
2478: } else {
2479: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2480: my %reply=&get($space,[$item]);
2481: return $reply{$item};
2482: }
2483: } elsif ($realm eq 'query') {
2484: # ---------------------------------------------- pull stuff out of query string
2485: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
2486: return $ENV{'form.'.$space};
2487: } elsif ($realm eq 'request') {
2488: # ------------------------------------------------------------- request.browser
2489: if ($space eq 'browser') {
2490: return $ENV{'browser.'.$qualifier};
2491: # ------------------------------------------------------------ request.filename
2492: } else {
2493: return $ENV{'request.'.$spacequalifierrest};
2494: }
2495: } elsif ($realm eq 'course') {
2496: # ---------------------------------------------------------- course.description
2497: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
2498: } elsif ($realm eq 'resource') {
2499:
2500: if ($courseid eq $ENV{'request.course.id'}) {
2501:
2502: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2503:
2504: # ----------------------------------------------------- Cascading lookup scheme
2505: if (!$symbparm) { $symbparm=&symbread(); }
2506: my $symbp=$symbparm;
2507: my $mapp=(split(/\_\_\_/,$symbp))[0];
2508:
2509: my $symbparm=$symbp.'.'.$spacequalifierrest;
2510: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2511:
2512: my $section;
2513: if (($ENV{'user.name'} eq $uname) &&
2514: ($ENV{'user.domain'} eq $udom)) {
2515: $section=$ENV{'request.course.sec'};
2516: } else {
2517: $section=&usection($udom,$uname,$courseid);
2518: }
2519:
2520: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
2521: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
2522: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
2523:
2524: my $courselevel=$courseid.'.'.$spacequalifierrest;
2525: my $courselevelr=$courseid.'.'.$symbparm;
2526: my $courselevelm=$courseid.'.'.$mapparm;
2527:
2528: # ----------------------------------------------------------- first, check user
2529: my %resourcedata=&get('resourcedata',
2530: [$courselevelr,$courselevelm,$courselevel],
2531: $udom,$uname);
2532: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2533: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2534:
2535: if ($resourcedata{$courselevelr}) {
2536: return $resourcedata{$courselevelr}; }
2537: if ($resourcedata{$courselevelm}) {
2538: return $resourcedata{$courselevelm}; }
2539: if ($resourcedata{$courselevel}) {
2540: return $resourcedata{$courselevel}; }
2541: } else {
2542: if ($resourcedata{$courselevelr}!~/No such file/) {
2543: &logthis("<font color=blue>WARNING:".
2544: " Trying to get resource data for ".
2545: $uname." at ".$udom.": ".
2546: $resourcedata{$courselevelr}."</font>");
2547: }
2548: }
2549:
2550: # -------------------------------------------------------- second, check course
2551:
2552: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
2553: $ENV{'course.'.$courseid.'.domain'},
2554: ($seclevelr,$seclevelm,$seclevel,
2555: $courselevelr,$courselevelm,
2556: $courselevel));
2557: if ($coursereply) { return $coursereply; }
2558:
2559: # ------------------------------------------------------ third, check map parms
2560: my %parmhash=();
2561: my $thisparm='';
2562: if (tie(%parmhash,'GDBM_File',
2563: $ENV{'request.course.fn'}.'_parms.db',
2564: &GDBM_READER(),0640)) {
2565: $thisparm=$parmhash{$symbparm};
2566: untie(%parmhash);
2567: }
2568: if ($thisparm) { return $thisparm; }
2569: }
2570: # --------------------------------------------- last, look in resource metadata
2571:
2572: $spacequalifierrest=~s/\./\_/;
2573: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2574: if ($metadata) { return $metadata; }
2575: $metadata=&metadata($ENV{'request.filename'},
2576: 'parameter_'.$spacequalifierrest);
2577: if ($metadata) { return $metadata; }
2578:
2579: # ------------------------------------------------------------------ Cascade up
2580: unless ($space eq '0') {
2581: my ($part,$id)=split(/\_/,$space);
2582: if ($id) {
2583: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2584: $symbparm,$udom,$uname);
2585: if ($partgeneral) { return $partgeneral; }
2586: } else {
2587: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2588: $symbparm,$udom,$uname);
2589: if ($resourcegeneral) { return $resourcegeneral; }
2590: }
2591: }
2592:
2593: # ---------------------------------------------------- Any other user namespace
2594: } elsif ($realm eq 'environment') {
2595: # ----------------------------------------------------------------- environment
2596: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
2597: return $ENV{'environment.'.$spacequalifierrest};
2598: } else {
2599: my %returnhash=&userenvironment($udom,$uname,
2600: $spacequalifierrest);
2601: return $returnhash{$spacequalifierrest};
2602: }
2603: } elsif ($realm eq 'system') {
2604: # ----------------------------------------------------------------- system.time
2605: if ($space eq 'time') {
2606: return time;
2607: }
2608: }
2609: return '';
2610: }
2611:
2612: # ---------------------------------------------------------------- Get metadata
2613:
2614: sub metadata {
2615: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2616:
2617: $uri=&declutter($uri);
2618: my $filename=$uri;
2619: $uri=~s/\.meta$//;
2620: #
2621: # Is the metadata already cached?
2622: # Look at timestamp of caching
2623: # Everything is cached by the main uri, libraries are never directly cached
2624: #
2625: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2626: #
2627: # Is this a recursive call for a library?
2628: #
2629: if ($liburi) {
2630: $liburi=&declutter($liburi);
2631: $filename=$liburi;
2632: }
2633: my %metathesekeys=();
2634: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2635: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2636: my $parser=HTML::LCParser->new(\$metastring);
2637: my $token;
2638: undef %metathesekeys;
2639: while ($token=$parser->get_token) {
2640: if ($token->[0] eq 'S') {
2641: if (defined($token->[2]->{'package'})) {
2642: #
2643: # This is a package - get package info
2644: #
2645: my $package=$token->[2]->{'package'};
2646: my $keyroot='';
2647: if ($prefix) {
2648: $keyroot.='_'.$prefix;
2649: } else {
2650: if (defined($token->[2]->{'part'})) {
2651: $keyroot.='_'.$token->[2]->{'part'};
2652: }
2653: }
2654: if (defined($token->[2]->{'id'})) {
2655: $keyroot.='_'.$token->[2]->{'id'};
2656: }
2657: if ($metacache{$uri.':packages'}) {
2658: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2659: } else {
2660: $metacache{$uri.':packages'}=$package.$keyroot;
2661: }
2662: foreach (keys %packagetab) {
2663: if ($_=~/^$package\&/) {
2664: my ($pack,$name,$subp)=split(/\&/,$_);
2665: my $value=$packagetab{$_};
2666: my $part=$keyroot;
2667: $part=~s/^\_//;
2668: if ($subp eq 'display') {
2669: $value.=' [Part: '.$part.']';
2670: }
2671: my $unikey='parameter'.$keyroot.'_'.$name;
2672: $metathesekeys{$unikey}=1;
2673: $metacache{$uri.':'.$unikey.'.part'}=$part;
2674: unless
2675: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2676: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2677: }
2678: }
2679: }
2680: } else {
2681: #
2682: # This is not a package - some other kind of start tag
2683: #
2684: my $entry=$token->[1];
2685: my $unikey;
2686: if ($entry eq 'import') {
2687: $unikey='';
2688: } else {
2689: $unikey=$entry;
2690: }
2691: if ($prefix) {
2692: $unikey.=$prefix;
2693: } else {
2694: if (defined($token->[2]->{'part'})) {
2695: $unikey.='_'.$token->[2]->{'part'};
2696: }
2697: }
2698: if (defined($token->[2]->{'id'})) {
2699: $unikey.='_'.$token->[2]->{'id'};
2700: }
2701:
2702: if ($entry eq 'import') {
2703: #
2704: # Importing a library here
2705: #
2706: if (defined($depthcount)) { $depthcount++; } else
2707: { $depthcount=0; }
2708: if ($depthcount<20) {
2709: foreach (split(/\,/,&metadata($uri,'keys',
2710: $parser->get_text('/import'),$unikey,
2711: $depthcount))) {
2712: $metathesekeys{$_}=1;
2713: }
2714: }
2715: } else {
2716:
2717: if (defined($token->[2]->{'name'})) {
2718: $unikey.='_'.$token->[2]->{'name'};
2719: }
2720: $metathesekeys{$unikey}=1;
2721: foreach (@{$token->[3]}) {
2722: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2723: }
2724: unless (
2725: $metacache{$uri.':'.$unikey}=&HTML::Entities::decode($parser->get_text('/'.$entry))
2726: ) { $metacache{$uri.':'.$unikey}=
2727: $metacache{$uri.':'.$unikey.'.default'};
2728: }
2729: # end of not-a-package not-a-library import
2730: }
2731: # end of not-a-package start tag
2732: }
2733: # the next is the end of "start tag"
2734: }
2735: }
2736: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
2737: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2738: $metacache{$uri.':cachedtimestamp'}=time;
2739: # this is the end of "was not already recently cached
2740: }
2741: return $metacache{$uri.':'.$what};
2742: }
2743:
2744: sub metadata_generate_part0 {
2745: my ($metadata,$metacache,$uri) = @_;
2746: my %allnames;
2747: foreach my $metakey (sort keys %$metadata) {
2748: if ($metakey=~/^parameter\_(.*)/) {
2749: my $part=$$metacache{$uri.':'.$metakey.'.part'};
2750: my $name=$$metacache{$uri.':'.$metakey.'.name'};
2751: if (! exists($$metadata{'parameter_0_'.$name})) {
2752: $allnames{$name}=$part;
2753: }
2754: }
2755: }
2756: foreach my $name (keys(%allnames)) {
2757: $$metadata{"parameter_0_$name"}=1;
2758: my $key="$uri:parameter_0_$name";
2759: $$metacache{"$key.part"}='0';
2760: $$metacache{"$key.name"}=$name;
2761: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
2762: $allnames{$name}.'_'.$name.
2763: '.type'};
2764: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
2765: '.display'};
2766: my $expr='\\[Part: '.$allnames{$name}.'\\]';
2767: $olddis=~s/$expr/\[Part: 0\]/;
2768: $$metacache{"$key.display"}=$olddis;
2769: }
2770: }
2771:
2772: # ------------------------------------------------- Update symbolic store links
2773:
2774: sub symblist {
2775: my ($mapname,%newhash)=@_;
2776: $mapname=declutter($mapname);
2777: my %hash;
2778: if (($ENV{'request.course.fn'}) && (%newhash)) {
2779: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2780: &GDBM_WRCREAT(),0640)) {
2781: foreach (keys %newhash) {
2782: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2783: }
2784: if (untie(%hash)) {
2785: return 'ok';
2786: }
2787: }
2788: }
2789: return 'error';
2790: }
2791:
2792: # --------------------------------------------------------------- Verify a symb
2793:
2794: sub symbverify {
2795: my ($symb,$thisfn)=@_;
2796: $thisfn=&declutter($thisfn);
2797: # direct jump to resource in page or to a sequence - will construct own symbs
2798: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
2799: # check URL part
2800: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
2801: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
2802:
2803: $symb=&symbclean($symb);
2804:
2805: my %bighash;
2806: my $okay=0;
2807: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2808: &GDBM_READER(),0640)) {
2809: my $ids=$bighash{'ids_/res/'.$thisfn};
2810: unless ($ids) {
2811: $ids=$bighash{'ids_/'.$thisfn};
2812: }
2813: if ($ids) {
2814: # ------------------------------------------------------------------- Has ID(s)
2815: foreach (split(/\,/,$ids)) {
2816: my ($mapid,$resid)=split(/\./,$_);
2817: if (
2818: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
2819: eq $symb) {
2820: $okay=1;
2821: }
2822: }
2823: }
2824: untie(%bighash);
2825: }
2826: return $okay;
2827: }
2828:
2829: # --------------------------------------------------------------- Clean-up symb
2830:
2831: sub symbclean {
2832: my $symb=shift;
2833:
2834: # remove version from map
2835: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
2836:
2837: # remove version from URL
2838: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
2839:
2840: return $symb;
2841: }
2842:
2843: # ------------------------------------------------------ Return symb list entry
2844:
2845: sub symbread {
2846: my ($thisfn,$donotrecurse)=@_;
2847: # no filename provided? try from environment
2848: unless ($thisfn) {
2849: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
2850: $thisfn=$ENV{'request.filename'};
2851: }
2852: # is that filename actually a symb? Verify, clean, and return
2853: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
2854: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
2855: }
2856: $thisfn=declutter($thisfn);
2857: my %hash;
2858: my %bighash;
2859: my $syval='';
2860: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2861: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2862: &GDBM_READER(),0640)) {
2863: $syval=$hash{$thisfn};
2864: untie(%hash);
2865: }
2866: # ---------------------------------------------------------- There was an entry
2867: if ($syval) {
2868: unless ($syval=~/\_\d+$/) {
2869: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2870: &appenv('request.ambiguous' => $thisfn);
2871: return '';
2872: }
2873: $syval.=$1;
2874: }
2875: } else {
2876: # ------------------------------------------------------- Was not in symb table
2877: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2878: &GDBM_READER(),0640)) {
2879: # ---------------------------------------------- Get ID(s) for current resource
2880: my $ids=$bighash{'ids_/res/'.$thisfn};
2881: unless ($ids) {
2882: $ids=$bighash{'ids_/'.$thisfn};
2883: }
2884: unless ($ids) {
2885: # alias?
2886: $ids=$bighash{'mapalias_'.$thisfn};
2887: }
2888: if ($ids) {
2889: # ------------------------------------------------------------------- Has ID(s)
2890: my @possibilities=split(/\,/,$ids);
2891: if ($#possibilities==0) {
2892: # ----------------------------------------------- There is only one possibility
2893: my ($mapid,$resid)=split(/\./,$ids);
2894: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2895: } elsif (!$donotrecurse) {
2896: # ------------------------------------------ There is more than one possibility
2897: my $realpossible=0;
2898: foreach (@possibilities) {
2899: my $file=$bighash{'src_'.$_};
2900: if (&allowed('bre',$file)) {
2901: my ($mapid,$resid)=split(/\./,$_);
2902: if ($bighash{'map_type_'.$mapid} ne 'page') {
2903: $realpossible++;
2904: $syval=declutter($bighash{'map_id_'.$mapid}).
2905: '___'.$resid;
2906: }
2907: }
2908: }
2909: if ($realpossible!=1) { $syval=''; }
2910: } else {
2911: $syval='';
2912: }
2913: }
2914: untie(%bighash)
2915: }
2916: }
2917: if ($syval) {
2918: return &symbclean($syval.'___'.$thisfn);
2919: }
2920: }
2921: &appenv('request.ambiguous' => $thisfn);
2922: return '';
2923: }
2924:
2925: # ---------------------------------------------------------- Return random seed
2926:
2927: sub numval {
2928: my $txt=shift;
2929: $txt=~tr/A-J/0-9/;
2930: $txt=~tr/a-j/0-9/;
2931: $txt=~tr/K-T/0-9/;
2932: $txt=~tr/k-t/0-9/;
2933: $txt=~tr/U-Z/0-5/;
2934: $txt=~tr/u-z/0-5/;
2935: $txt=~s/\D//g;
2936: return int($txt);
2937: }
2938:
2939: sub rndseed {
2940: my ($symb,$courseid,$domain,$username)=@_;
2941: if (!$symb) {
2942: unless ($symb=&symbread()) { return time; }
2943: }
2944: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2945: if (!$domain) {$domain=$ENV{'user.domain'};}
2946: if (!$username) {$username=$ENV{'user.name'};}
2947: {
2948: use integer;
2949: my $symbchck=unpack("%32C*",$symb) << 27;
2950: my $symbseed=numval($symb) << 22;
2951: my $namechck=unpack("%32C*",$username) << 17;
2952: my $nameseed=numval($username) << 12;
2953: my $domainseed=unpack("%32C*",$domain) << 7;
2954: my $courseseed=unpack("%32C*",$courseid);
2955: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2956: #uncommenting these lines can break things!
2957: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2958: #&Apache::lonxml::debug("rndseed :$num:$symb");
2959: return $num;
2960: }
2961: }
2962:
2963: sub ireceipt {
2964: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2965: my $cuname=unpack("%32C*",$funame);
2966: my $cudom=unpack("%32C*",$fudom);
2967: my $cucourseid=unpack("%32C*",$fucourseid);
2968: my $cusymb=unpack("%32C*",$fusymb);
2969: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2970: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2971: ($cunique%$cuname+
2972: $cunique%$cudom+
2973: $cusymb%$cuname+
2974: $cusymb%$cudom+
2975: $cucourseid%$cuname+
2976: $cucourseid%$cudom);
2977: }
2978:
2979: sub receipt {
2980: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
2981: return &ireceipt($name,$domain,$courseid,$symb);
2982: }
2983:
2984: # ------------------------------------------------------------ Serves up a file
2985: # returns either the contents of the file or a -1
2986: sub getfile {
2987: my $file=shift;
2988: &repcopy($file);
2989: if (! -e $file ) { return -1; };
2990: my $fh=Apache::File->new($file);
2991: my $a='';
2992: while (<$fh>) { $a .=$_; }
2993: return $a
2994: }
2995:
2996: sub filelocation {
2997: my ($dir,$file) = @_;
2998: my $location;
2999: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3000: if ($file=~m:^/~:) { # is a contruction space reference
3001: $location = $file;
3002: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3003: } else {
3004: $file=~s/^$perlvar{'lonDocRoot'}//;
3005: $file=~s:^/*res::;
3006: if ( !( $file =~ m:^/:) ) {
3007: $location = $dir. '/'.$file;
3008: } else {
3009: $location = '/home/httpd/html/res'.$file;
3010: }
3011: }
3012: $location=~s://+:/:g; # remove duplicate /
3013: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3014: return $location;
3015: }
3016:
3017: sub hreflocation {
3018: my ($dir,$file)=@_;
3019: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3020: my $finalpath=filelocation($dir,$file);
3021: $finalpath=~s/^\/home\/httpd\/html//;
3022: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3023: return $finalpath;
3024: } else {
3025: return $file;
3026: }
3027: }
3028:
3029: # ------------------------------------------------------------- Declutters URLs
3030:
3031: sub declutter {
3032: my $thisfn=shift;
3033: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3034: $thisfn=~s/^\///;
3035: $thisfn=~s/^res\///;
3036: $thisfn=~s/\?.+$//;
3037: return $thisfn;
3038: }
3039:
3040: # -------------------------------------------------------- Escape Special Chars
3041:
3042: sub escape {
3043: my $str=shift;
3044: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3045: return $str;
3046: }
3047:
3048: # ----------------------------------------------------- Un-Escape Special Chars
3049:
3050: sub unescape {
3051: my $str=shift;
3052: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3053: return $str;
3054: }
3055:
3056: # ================================================================ Main Program
3057:
3058: sub goodbye {
3059: &logthis("Starting Shut down");
3060: &flushcourselogs();
3061: &logthis("Shutting down");
3062: }
3063:
3064: BEGIN {
3065: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3066: unless ($readit) {
3067: {
3068: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3069:
3070: while (my $configline=<$config>) {
3071: if ($configline =~ /^[^\#]*PerlSetVar/) {
3072: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3073: chomp($varvalue);
3074: $perlvar{$varname}=$varvalue;
3075: }
3076: }
3077: }
3078: {
3079: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3080:
3081: while (my $configline=<$config>) {
3082: if ($configline =~ /^[^\#]*PerlSetVar/) {
3083: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3084: chomp($varvalue);
3085: $perlvar{$varname}=$varvalue;
3086: }
3087: }
3088: }
3089:
3090: # ------------------------------------------------------------- Read hosts file
3091: {
3092: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3093:
3094: while (my $configline=<$config>) {
3095: chomp($configline);
3096: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3097: if ($id && $domain && $role && $name && $ip) {
3098: $hostname{$id}=$name;
3099: $hostdom{$id}=$domain;
3100: $hostip{$id}=$ip;
3101: if ($domdescr) { $domaindescription{$domain}=$domdescr; }
3102: if ($role eq 'library') { $libserv{$id}=$name; }
3103: } else {
3104: if ($configline) {
3105: &logthis("Skipping hosts.tab line -$configline-");
3106: }
3107: }
3108: }
3109: }
3110:
3111: # ------------------------------------------------------ Read spare server file
3112: {
3113: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3114:
3115: while (my $configline=<$config>) {
3116: chomp($configline);
3117: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
3118: $spareid{$configline}=1;
3119: }
3120: }
3121: }
3122: # ------------------------------------------------------------ Read permissions
3123: {
3124: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3125:
3126: while (my $configline=<$config>) {
3127: chomp($configline);
3128: if ($configline) {
3129: my ($role,$perm)=split(/ /,$configline);
3130: if ($perm ne '') { $pr{$role}=$perm; }
3131: }
3132: }
3133: }
3134:
3135: # -------------------------------------------- Read plain texts for permissions
3136: {
3137: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3138:
3139: while (my $configline=<$config>) {
3140: chomp($configline);
3141: if ($configline) {
3142: my ($short,$plain)=split(/:/,$configline);
3143: if ($plain ne '') { $prp{$short}=$plain; }
3144: }
3145: }
3146: }
3147:
3148: # ---------------------------------------------------------- Read package table
3149: {
3150: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3151:
3152: while (my $configline=<$config>) {
3153: chomp($configline);
3154: my ($short,$plain)=split(/:/,$configline);
3155: my ($pack,$name)=split(/\&/,$short);
3156: if ($plain ne '') {
3157: $packagetab{$pack.'&'.$name.'&name'}=$name;
3158: $packagetab{$short}=$plain;
3159: }
3160: }
3161: }
3162:
3163: %metacache=();
3164:
3165: $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
3166: $dumpcount=0;
3167:
3168: &logtouch();
3169: &logthis('<font color=yellow>INFO: Read configuration</font>');
3170: $readit=1;
3171: }
3172: }
3173:
3174: 1;
3175: __END__
3176:
3177: =pod
3178:
3179: =head1 NAME
3180:
3181: Apache::lonnet - Subroutines to ask questions about things in the network.
3182:
3183: =head1 SYNOPSIS
3184:
3185: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3186:
3187: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3188:
3189: Common parameters:
3190:
3191: =over 4
3192:
3193: =item *
3194:
3195: $uname : an internal username (if $cname expecting a course Id specifically)
3196:
3197: =item *
3198:
3199: $udom : a domain (if $cdom expecting a course's domain specifically)
3200:
3201: =item *
3202:
3203: $symb : a resource instance identifier
3204:
3205: =item *
3206:
3207: $namespace : the name of a .db file that contains the data needed or
3208: being set.
3209:
3210: =back
3211:
3212: =head1 INTRODUCTION
3213:
3214: This module provides subroutines which interact with the
3215: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3216: - classes
3217: - users
3218: - resources
3219:
3220: For many of these objects you can also use this to store data about
3221: them or modify them in various ways.
3222:
3223: This is part of the LearningOnline Network with CAPA project
3224: described at http://www.lon-capa.org.
3225:
3226: =head1 RETURN MESSAGES
3227:
3228: =over 4
3229:
3230: =item *
3231:
3232: con_lost : unable to contact remote host
3233:
3234: =item *
3235:
3236: con_delayed : unable to contact remote host, message will be delivered
3237: when the connection is brought back up
3238:
3239: =item *
3240:
3241: con_failed : unable to contact remote host and unable to save message
3242: for later delivery
3243:
3244: =item *
3245:
3246: error: : an error a occured, a description of the error follows the :
3247:
3248: =item *
3249:
3250: no_such_host : unable to fund a host associated with the user/domain
3251: that was requested
3252:
3253: =back
3254:
3255: =head1 PUBLIC SUBROUTINES
3256:
3257: =head2 Session Environment Functions
3258:
3259: =over 4
3260:
3261: =item *
3262:
3263: appenv(%hash) : the value of %hash is written to the user envirnoment
3264: file, and will be restored for each access this user makes during this
3265: session, also modifies the %ENV for the current process
3266:
3267: =item *
3268:
3269: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3270:
3271: =back
3272:
3273: =head2 User Information
3274:
3275: =over 4
3276:
3277: =item *
3278:
3279: queryauthenticate($uname,$udom) : try to determine user's current
3280: authentication scheme
3281:
3282: =item *
3283:
3284: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3285: servers (first use the current one), $upass should be the users password
3286:
3287: =item *
3288:
3289: homeserver($uname,$udom) : find the server which has the user's
3290: directory and files (there must be only one), this caches the answer,
3291: and also caches if there is a borken connection.
3292:
3293: =item *
3294:
3295: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3296: unique resource in a domain, there must be only 1 ID per username, and
3297: only 1 username per ID in a specific domain) (returns hash:
3298: id=>name,id=>name)
3299:
3300: =item *
3301:
3302: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3303: name=>id,name=>id)
3304:
3305: =item *
3306:
3307: idput($udom,%ids) : store away a list of names and associated IDs
3308:
3309: =item *
3310:
3311: rolesinit($udom,$username,$authhost) : get user privileges
3312:
3313: =item *
3314:
3315: usection($udom,$uname,$cname) : finds the section of student in the
3316: course $cname, return section name/number or '' for "not in course"
3317: and '-1' for "no section"
3318:
3319: =item *
3320:
3321: userenvironment($udom,$uname,@what) : gets the values of the keys
3322: passed in @what from the requested user's environment, returns a hash
3323:
3324: =back
3325:
3326: =head2 User Roles
3327:
3328: =over 4
3329:
3330: =item *
3331:
3332: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
3333: actions
3334: F: full access
3335: U,I,K: authentication modes (cxx only)
3336: '': forbidden
3337: 1: user needs to choose course
3338: 2: browse allowed
3339:
3340: =item *
3341:
3342: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
3343: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
3344: and course level
3345:
3346: =item *
3347:
3348: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
3349: explanation of a user role term
3350:
3351: =back
3352:
3353: =head2 User Modification
3354:
3355: =over 4
3356:
3357: =item *
3358:
3359: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
3360: user for the level given by URL. Optional start and end dates (leave empty
3361: string or zero for "no date")
3362:
3363: =item *
3364:
3365: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
3366: change a users, password, possible return values are: ok,
3367: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
3368: refused
3369:
3370: =item *
3371:
3372: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
3373:
3374: =item *
3375:
3376: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
3377: modify user
3378:
3379: =item *
3380:
3381: modifystudent($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,$end,$start) : modify student
3382:
3383: =item *
3384:
3385: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
3386: custom role; give a custom role to a user for the level given by URL. Specify
3387: name and domain of role author, and role name
3388:
3389: =item *
3390:
3391: revokerole($udom,$uname,$url,$role) : revoke a role for url
3392:
3393: =item *
3394:
3395: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
3396:
3397: =back
3398:
3399: =head2 Course Infomation
3400:
3401: =over 4
3402:
3403: =item *
3404:
3405: coursedescription($courseid) : course description
3406:
3407: =item *
3408:
3409: courseresdata($coursenum,$coursedomain,@which) : request for current
3410: parameter setting for a specific course, @what should be a list of
3411: parameters to ask about. This routine caches answers for 5 minutes.
3412:
3413: =back
3414:
3415: =head2 Course Modification
3416:
3417: =over 4
3418:
3419: =item *
3420:
3421: writecoursepref($courseid,%prefs) : write preferences (environment
3422: database) for a course
3423:
3424: =item *
3425:
3426: createcourse($udom,$description,$url) : make/modify course
3427:
3428: =back
3429:
3430: =head2 Resource Subroutines
3431:
3432: =over 4
3433:
3434: =item *
3435:
3436: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
3437:
3438: =item *
3439:
3440: repcopy($filename) : subscribes to the requested file, and attempts to
3441: replicate from the owning library server, Might return
3442: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
3443: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
3444: resource. Expects the local filesystem pathname
3445: (/home/httpd/html/res/....)
3446:
3447: =back
3448:
3449: =head2 Resource Information
3450:
3451: =over 4
3452:
3453: =item *
3454:
3455: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
3456: a vairety of different possible values, $varname should be a request
3457: string, and the other parameters can be used to specify who and what
3458: one is asking about.
3459:
3460: Possible values for $varname are environment.lastname (or other item
3461: from the envirnment hash), user.name (or someother aspect about the
3462: user), resource.0.maxtries (or some other part and parameter of a
3463: resource)
3464:
3465: =item *
3466:
3467: directcondval($number) : get current value of a condition; reads from a state
3468: string
3469:
3470: =item *
3471:
3472: condval($condidx) : value of condition index based on state
3473:
3474: =item *
3475:
3476: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
3477: resource's metadata, $what should be either a specific key, or either
3478: 'keys' (to get a list of possible keys) or 'packages' to get a list of
3479: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
3480:
3481: this function automatically caches all requests
3482:
3483: =item *
3484:
3485: metadata_query($query,$custom,$customshow) : make a metadata query against the
3486: network of library servers; returns file handle of where SQL and regex results
3487: will be stored for query
3488:
3489: =item *
3490:
3491: symbread($filename) : return symbolic list entry (filename argument optional);
3492: returns the data handle
3493:
3494: =item *
3495:
3496: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
3497: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
3498: failure, user must be in a course, as it assumes the existance of the
3499: course initi hash, and uses $ENV('request.course.id'}
3500:
3501:
3502: =item *
3503:
3504: symbclean($symb) : removes versions numbers from a symb, returns the
3505: cleaned symb
3506:
3507: =item *
3508:
3509: is_on_map($uri) : checks if the $uri is somewhere on the current
3510: course map, user must be in a course for it to work.
3511:
3512: =item *
3513:
3514: numval($salt) : return random seed value (addend for rndseed)
3515:
3516: =item *
3517:
3518: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
3519: a random seed, all arguments are optional, if they aren't sent it uses the
3520: environment to derive them. Note: if symb isn't sent and it can't get one
3521: from &symbread it will use the current time as its return value
3522:
3523: =item *
3524:
3525: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
3526: unfakeable, receipt
3527:
3528: =item *
3529:
3530: receipt() : API to ireceipt working off of ENV values; given out to users
3531:
3532: =item *
3533:
3534: countacc($url) : count the number of accesses to a given URL
3535:
3536: =item *
3537:
3538: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
3539:
3540: =item *
3541:
3542: checkin($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 $tcrsid)
3543:
3544: =item *
3545:
3546: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
3547:
3548: =item *
3549:
3550: devalidate($symb) : devalidate temporary spreadsheet calculations,
3551: forcing spreadsheet to reevaluate the resource scores next time.
3552:
3553: =back
3554:
3555: =head2 Storing/Retreiving Data
3556:
3557: =over 4
3558:
3559: =item *
3560:
3561: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
3562: for this url; hashref needs to be given and should be a \%hashname; the
3563: remaining args aren't required and if they aren't passed or are '' they will
3564: be derived from the ENV
3565:
3566: =item *
3567:
3568: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
3569: uses critical subroutine
3570:
3571: =item *
3572:
3573: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
3574: all args are optional
3575:
3576: =item *
3577:
3578: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
3579: works very similar to store/cstore, but all data is stored in a
3580: temporary location and can be reset using tmpreset, $storehash should
3581: be a hash reference, returns nothing on success
3582:
3583: =item *
3584:
3585: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
3586: similar to restore, but all data is stored in a temporary location and
3587: can be reset using tmpreset. Returns a hash of values on success,
3588: error string otherwise.
3589:
3590: =item *
3591:
3592: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
3593: deltes all keys for $symb form the temporary storage hash.
3594:
3595: =item *
3596:
3597: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
3598: reference filled in from namesp ($udom and $uname are optional)
3599:
3600: =item *
3601:
3602: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
3603: namesp ($udom and $uname are optional)
3604:
3605: =item *
3606:
3607: dump($namespace,$udom,$uname,$regexp) :
3608: dumps the complete (or key matching regexp) namespace into a hash
3609: ($udom, $uname and $regexp are optional)
3610:
3611: =item *
3612:
3613: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
3614: ($udom and $uname are optional)
3615:
3616: =item *
3617:
3618: cput($namespace,$storehash,$udom,$uname) : critical put
3619: ($udom and $uname are optional)
3620:
3621: =item *
3622:
3623: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
3624: reference filled in from namesp (encrypts the return communication)
3625: ($udom and $uname are optional)
3626:
3627: =item *
3628:
3629: log($udom,$name,$home,$message) : write to permanent log for user; use
3630: critical subroutine
3631:
3632: =back
3633:
3634: =head2 Network Status Functions
3635:
3636: =over 4
3637:
3638: =item *
3639:
3640: dirlist($uri) : return directory list based on URI
3641:
3642: =item *
3643:
3644: spareserver() : find server with least workload from spare.tab
3645:
3646: =back
3647:
3648: =head2 Apache Request
3649:
3650: =over 4
3651:
3652: =item *
3653:
3654: ssi($url,%hash) : server side include, does a complete request cycle on url to
3655: localhost, posts hash
3656:
3657: =back
3658:
3659: =head2 Data to String to Data
3660:
3661: =over 4
3662:
3663: =item *
3664:
3665: hash2str(%hash) : convert a hash into a string complete with escaping and '='
3666: and '&' separators, supports elements that are arrayrefs and hashrefs
3667:
3668: =item *
3669:
3670: hashref2str($hashref) : convert a hashref into a string complete with
3671: escaping and '=' and '&' separators, supports elements that are
3672: arrayrefs and hashrefs
3673:
3674: =item *
3675:
3676: arrayref2str($arrayref) : convert an arrayref into a string complete
3677: with escaping and '&' separators, supports elements that are arrayrefs
3678: and hashrefs
3679:
3680: =item *
3681:
3682: str2hash($string) : convert string to hash using unescaping and
3683: splitting on '=' and '&', supports elements that are arrayrefs and
3684: hashrefs
3685:
3686: =item *
3687:
3688: str2array($string) : convert string to hash using unescaping and
3689: splitting on '&', supports elements that are arrayrefs and hashrefs
3690:
3691: =back
3692:
3693: =head2 Logging Routines
3694:
3695: =over 4
3696:
3697: These routines allow one to make log messages in the lonnet.log and
3698: lonnet.perm logfiles.
3699:
3700: =item *
3701:
3702: logtouch() : make sure the logfile, lonnet.log, exists
3703:
3704: =item *
3705:
3706: logthis() : append message to the normal lonnet.log file, it gets
3707: preiodically rolled over and deleted.
3708:
3709: =item *
3710:
3711: logperm() : append a permanent message to lonnet.perm.log, this log
3712: file never gets deleted by any automated portion of the system, only
3713: messages of critical importance should go in here.
3714:
3715: =back
3716:
3717: =head2 General File Helper Routines
3718:
3719: =over 4
3720:
3721: =item *
3722:
3723: getfile($file) : returns the entire contents of a file or -1; it
3724: properly subscribes to and replicates the file if neccessary.
3725:
3726: =item *
3727:
3728: filelocation($dir,$file) : returns file system location of a file
3729: based on URI; meant to be "fairly clean" absolute reference, $dir is a
3730: directory that relative $file lookups are to looked in ($dir of /a/dir
3731: and a file of ../bob will become /a/bob)
3732:
3733: =item *
3734:
3735: hreflocation($dir,$file) : returns file system location or a URL; same as
3736: filelocation except for hrefs
3737:
3738: =item *
3739:
3740: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
3741:
3742: =back
3743:
3744: =head2 HTTP Helper Routines
3745:
3746: =over 4
3747:
3748: =item *
3749:
3750: escape() : unpack non-word characters into CGI-compatible hex codes
3751:
3752: =item *
3753:
3754: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
3755:
3756: =back
3757:
3758: =head1 PRIVATE SUBROUTINES
3759:
3760: =head2 Underlying communication routines (Shouldn't call)
3761:
3762: =over 4
3763:
3764: =item *
3765:
3766: subreply() : tries to pass a message to lonc, returns con_lost if incapable
3767:
3768: =item *
3769:
3770: reply() : uses subreply to send a message to remote machine, logs all failures
3771:
3772: =item *
3773:
3774: critical() : passes a critical message to another server; if cannot
3775: get through then place message in connection buffer directory and
3776: returns con_delayed, if incapable of saving message, returns
3777: con_failed
3778:
3779: =item *
3780:
3781: reconlonc() : tries to reconnect lonc client processes.
3782:
3783: =back
3784:
3785: =head2 Resource Access Logging
3786:
3787: =over 4
3788:
3789: =item *
3790:
3791: flushcourselogs() : flush (save) buffer logs and access logs
3792:
3793: =item *
3794:
3795: courselog($what) : save message for course in hash
3796:
3797: =item *
3798:
3799: courseacclog($what) : save message for course using &courselog(). Perform
3800: special processing for specific resource types (problems, exams, quizzes, etc).
3801:
3802: =item *
3803:
3804: goodbye() : flush course logs and log shutting down; it is called in srm.conf
3805: as a PerlChildExitHandler
3806:
3807: =back
3808:
3809: =head2 Other
3810:
3811: =over 4
3812:
3813: =item *
3814:
3815: symblist($mapname,%newhash) : update symbolic storage links
3816:
3817: =back
3818:
3819: =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