1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.269 2002/08/17 18:58:28 www 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('nohist_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 get_scalar {
1004: my ($string,$end) = @_;
1005: my $value;
1006: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1007: $value = $1;
1008: } elsif ($$string =~ s/^([^&]*?)&//) {
1009: $value = $1;
1010: }
1011: return &unescape($value);
1012: }
1013:
1014: sub array2str {
1015: my (@array) = @_;
1016: my $result=&arrayref2str(\@array);
1017: $result=~s/^__ARRAY_REF__//;
1018: $result=~s/__END_ARRAY_REF__$//;
1019: return $result;
1020: }
1021:
1022: sub arrayref2str {
1023: my ($arrayref) = @_;
1024: my $result='__ARRAY_REF__';
1025: foreach my $elem (@$arrayref) {
1026: if(ref($elem) eq 'ARRAY') {
1027: $result.=&arrayref2str($elem).'&';
1028: } elsif(ref($elem) eq 'HASH') {
1029: $result.=&hashref2str($elem).'&';
1030: } elsif(ref($elem)) {
1031: #print("Got a ref of ".(ref($elem))." skipping.");
1032: } else {
1033: $result.=&escape($elem).'&';
1034: }
1035: }
1036: $result=~s/\&$//;
1037: $result .= '__END_ARRAY_REF__';
1038: return $result;
1039: }
1040:
1041: sub hash2str {
1042: my (%hash) = @_;
1043: my $result=&hashref2str(\%hash);
1044: $result=~s/^__HASH_REF__//;
1045: $result=~s/__END_HASH_REF__$//;
1046: return $result;
1047: }
1048:
1049: sub hashref2str {
1050: my ($hashref)=@_;
1051: my $result='__HASH_REF__';
1052: foreach (keys(%$hashref)) {
1053: if (ref($_) eq 'ARRAY') {
1054: $result.=&arrayref2str($_).'=';
1055: } elsif (ref($_) eq 'HASH') {
1056: $result.=&hashref2str($_).'=';
1057: } elsif (ref($_)) {
1058: $result.='=';
1059: #print("Got a ref of ".(ref($_))." skipping.");
1060: } else {
1061: if ($_) {$result.=&escape($_).'=';} else { last; }
1062: }
1063:
1064: if(ref($hashref->{$_}) eq 'ARRAY') {
1065: $result.=&arrayref2str($hashref->{$_}).'&';
1066: } elsif(ref($hashref->{$_}) eq 'HASH') {
1067: $result.=&hashref2str($hashref->{$_}).'&';
1068: } elsif(ref($hashref->{$_})) {
1069: $result.='&';
1070: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1071: } else {
1072: $result.=&escape($hashref->{$_}).'&';
1073: }
1074: }
1075: $result=~s/\&$//;
1076: $result .= '__END_HASH_REF__';
1077: return $result;
1078: }
1079:
1080: sub str2hash {
1081: my ($string)=@_;
1082: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1083: return %$hash;
1084: }
1085:
1086: sub str2hashref {
1087: my ($string) = @_;
1088:
1089: my %hash;
1090:
1091: if($string !~ /^__HASH_REF__/) {
1092: if (! ($string eq '' || !defined($string))) {
1093: $hash{'error'}='Not hash reference';
1094: }
1095: return (\%hash, $string);
1096: }
1097:
1098: $string =~ s/^__HASH_REF__//;
1099:
1100: while($string !~ /^__END_HASH_REF__/) {
1101: #key
1102: my $key='';
1103: if($string =~ /^__HASH_REF__/) {
1104: ($key, $string)=&str2hashref($string);
1105: if(defined($key->{'error'})) {
1106: $hash{'error'}='Bad data';
1107: return (\%hash, $string);
1108: }
1109: } elsif($string =~ /^__ARRAY_REF__/) {
1110: ($key, $string)=&str2arrayref($string);
1111: if($key->[0] eq 'Array reference error') {
1112: $hash{'error'}='Bad data';
1113: return (\%hash, $string);
1114: }
1115: } else {
1116: $string =~ s/^(.*?)=//;
1117: $key=&unescape($1);
1118: }
1119: $string =~ s/^=//;
1120:
1121: #value
1122: my $value='';
1123: if($string =~ /^__HASH_REF__/) {
1124: ($value, $string)=&str2hashref($string);
1125: if(defined($value->{'error'})) {
1126: $hash{'error'}='Bad data';
1127: return (\%hash, $string);
1128: }
1129: } elsif($string =~ /^__ARRAY_REF__/) {
1130: ($value, $string)=&str2arrayref($string);
1131: if($value->[0] eq 'Array reference error') {
1132: $hash{'error'}='Bad data';
1133: return (\%hash, $string);
1134: }
1135: } else {
1136: $value=&get_scalar(\$string,'__END_HASH_REF__');
1137: }
1138: $string =~ s/^&//;
1139:
1140: $hash{$key}=$value;
1141: }
1142:
1143: $string =~ s/^__END_HASH_REF__//;
1144:
1145: return (\%hash, $string);
1146: }
1147:
1148: sub str2array {
1149: my ($string)=@_;
1150: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1151: return @$array;
1152: }
1153:
1154: sub str2arrayref {
1155: my ($string) = @_;
1156: my @array;
1157:
1158: if($string !~ /^__ARRAY_REF__/) {
1159: if (! ($string eq '' || !defined($string))) {
1160: $array[0]='Array reference error';
1161: }
1162: return (\@array, $string);
1163: }
1164:
1165: $string =~ s/^__ARRAY_REF__//;
1166:
1167: while($string !~ /^__END_ARRAY_REF__/) {
1168: my $value='';
1169: if($string =~ /^__HASH_REF__/) {
1170: ($value, $string)=&str2hashref($string);
1171: if(defined($value->{'error'})) {
1172: $array[0] ='Array reference error';
1173: return (\@array, $string);
1174: }
1175: } elsif($string =~ /^__ARRAY_REF__/) {
1176: ($value, $string)=&str2arrayref($string);
1177: if($value->[0] eq 'Array reference error') {
1178: $array[0] ='Array reference error';
1179: return (\@array, $string);
1180: }
1181: } else {
1182: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1183: }
1184: $string =~ s/^&//;
1185:
1186: push(@array, $value);
1187: }
1188:
1189: $string =~ s/^__END_ARRAY_REF__//;
1190:
1191: return (\@array, $string);
1192: }
1193:
1194: # -------------------------------------------------------------------Temp Store
1195:
1196: sub tmpreset {
1197: my ($symb,$namespace,$domain,$stuname) = @_;
1198: if (!$symb) {
1199: $symb=&symbread();
1200: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1201: }
1202: $symb=escape($symb);
1203:
1204: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1205: $namespace=~s/\//\_/g;
1206: $namespace=~s/\W//g;
1207:
1208: #FIXME needs to do something for /pub resources
1209: if (!$domain) { $domain=$ENV{'user.domain'}; }
1210: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1211: my $path=$perlvar{'lonDaemons'}.'/tmp';
1212: my %hash;
1213: if (tie(%hash,'GDBM_File',
1214: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1215: &GDBM_WRCREAT(),0640)) {
1216: foreach my $key (keys %hash) {
1217: if ($key=~ /:$symb/) {
1218: delete($hash{$key});
1219: }
1220: }
1221: }
1222: }
1223:
1224: sub tmpstore {
1225: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1226:
1227: if (!$symb) {
1228: $symb=&symbread();
1229: if (!$symb) { $symb= $ENV{'request.url'}; }
1230: }
1231: $symb=escape($symb);
1232:
1233: if (!$namespace) {
1234: # I don't think we would ever want to store this for a course.
1235: # it seems this will only be used if we don't have a course.
1236: #$namespace=$ENV{'request.course.id'};
1237: #if (!$namespace) {
1238: $namespace=$ENV{'request.state'};
1239: #}
1240: }
1241: $namespace=~s/\//\_/g;
1242: $namespace=~s/\W//g;
1243: #FIXME needs to do something for /pub resources
1244: if (!$domain) { $domain=$ENV{'user.domain'}; }
1245: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1246: my $now=time;
1247: my %hash;
1248: my $path=$perlvar{'lonDaemons'}.'/tmp';
1249: if (tie(%hash,'GDBM_File',
1250: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1251: &GDBM_WRCREAT(),0640)) {
1252: $hash{"version:$symb"}++;
1253: my $version=$hash{"version:$symb"};
1254: my $allkeys='';
1255: foreach my $key (keys(%$storehash)) {
1256: $allkeys.=$key.':';
1257: $hash{"$version:$symb:$key"}=$$storehash{$key};
1258: }
1259: $hash{"$version:$symb:timestamp"}=$now;
1260: $allkeys.='timestamp';
1261: $hash{"$version:keys:$symb"}=$allkeys;
1262: if (untie(%hash)) {
1263: return 'ok';
1264: } else {
1265: return "error:$!";
1266: }
1267: } else {
1268: return "error:$!";
1269: }
1270: }
1271:
1272: # -----------------------------------------------------------------Temp Restore
1273:
1274: sub tmprestore {
1275: my ($symb,$namespace,$domain,$stuname) = @_;
1276:
1277: if (!$symb) {
1278: $symb=&symbread();
1279: if (!$symb) { $symb= $ENV{'request.url'}; }
1280: }
1281: $symb=escape($symb);
1282:
1283: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1284: #FIXME needs to do something for /pub resources
1285: if (!$domain) { $domain=$ENV{'user.domain'}; }
1286: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1287:
1288: my %returnhash;
1289: $namespace=~s/\//\_/g;
1290: $namespace=~s/\W//g;
1291: my %hash;
1292: my $path=$perlvar{'lonDaemons'}.'/tmp';
1293: if (tie(%hash,'GDBM_File',
1294: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1295: &GDBM_READER(),0640)) {
1296: my $version=$hash{"version:$symb"};
1297: $returnhash{'version'}=$version;
1298: my $scope;
1299: for ($scope=1;$scope<=$version;$scope++) {
1300: my $vkeys=$hash{"$scope:keys:$symb"};
1301: my @keys=split(/:/,$vkeys);
1302: my $key;
1303: $returnhash{"$scope:keys"}=$vkeys;
1304: foreach $key (@keys) {
1305: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1306: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1307: }
1308: }
1309: if (!(untie(%hash))) {
1310: return "error:$!";
1311: }
1312: } else {
1313: return "error:$!";
1314: }
1315: return %returnhash;
1316: }
1317:
1318: # ----------------------------------------------------------------------- Store
1319:
1320: sub store {
1321: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1322: my $home='';
1323:
1324: if ($stuname) { $home=&homeserver($stuname,$domain); }
1325:
1326: $symb=&symbclean($symb);
1327: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1328:
1329: &devalidate($symb);
1330:
1331: $symb=escape($symb);
1332: if (!$namespace) {
1333: unless ($namespace=$ENV{'request.course.id'}) {
1334: return '';
1335: }
1336: }
1337: if (!$domain) { $domain=$ENV{'user.domain'}; }
1338: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1339: if (!$home) { $home=$ENV{'user.home'}; }
1340: my $namevalue='';
1341: foreach (keys %$storehash) {
1342: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1343: }
1344: $namevalue=~s/\&$//;
1345: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1346: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1347: }
1348:
1349: # -------------------------------------------------------------- Critical Store
1350:
1351: sub cstore {
1352: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1353: my $home='';
1354:
1355: if ($stuname) { $home=&homeserver($stuname,$domain); }
1356:
1357: $symb=&symbclean($symb);
1358: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1359:
1360: &devalidate($symb);
1361:
1362: $symb=escape($symb);
1363: if (!$namespace) {
1364: unless ($namespace=$ENV{'request.course.id'}) {
1365: return '';
1366: }
1367: }
1368: if (!$domain) { $domain=$ENV{'user.domain'}; }
1369: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1370: if (!$home) { $home=$ENV{'user.home'}; }
1371:
1372: my $namevalue='';
1373: foreach (keys %$storehash) {
1374: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1375: }
1376: $namevalue=~s/\&$//;
1377: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1378: return critical
1379: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1380: }
1381:
1382: # --------------------------------------------------------------------- Restore
1383:
1384: sub restore {
1385: my ($symb,$namespace,$domain,$stuname) = @_;
1386: my $home='';
1387:
1388: if ($stuname) { $home=&homeserver($stuname,$domain); }
1389:
1390: if (!$symb) {
1391: unless ($symb=escape(&symbread())) { return ''; }
1392: } else {
1393: $symb=&escape(&symbclean($symb));
1394: }
1395: if (!$namespace) {
1396: unless ($namespace=$ENV{'request.course.id'}) {
1397: return '';
1398: }
1399: }
1400: if (!$domain) { $domain=$ENV{'user.domain'}; }
1401: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1402: if (!$home) { $home=$ENV{'user.home'}; }
1403: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1404:
1405: my %returnhash=();
1406: foreach (split(/\&/,$answer)) {
1407: my ($name,$value)=split(/\=/,$_);
1408: $returnhash{&unescape($name)}=&unescape($value);
1409: }
1410: my $version;
1411: for ($version=1;$version<=$returnhash{'version'};$version++) {
1412: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1413: $returnhash{$_}=$returnhash{$version.':'.$_};
1414: }
1415: }
1416: return %returnhash;
1417: }
1418:
1419: # ---------------------------------------------------------- Course Description
1420:
1421: sub coursedescription {
1422: my $courseid=shift;
1423: $courseid=~s/^\///;
1424: $courseid=~s/\_/\//g;
1425: my ($cdomain,$cnum)=split(/\//,$courseid);
1426: my $chome=&homeserver($cnum,$cdomain);
1427: if ($chome ne 'no_host') {
1428: my %returnhash=&dump('environment',$cdomain,$cnum);
1429: if (!exists($returnhash{'con_lost'})) {
1430: my $normalid=$cdomain.'_'.$cnum;
1431: my %envhash=();
1432: $returnhash{'home'}= $chome;
1433: $returnhash{'domain'} = $cdomain;
1434: $returnhash{'num'} = $cnum;
1435: while (my ($name,$value) = each %returnhash) {
1436: $envhash{'course.'.$normalid.'.'.$name}=$value;
1437: }
1438: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1439: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1440: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1441: $envhash{'course.'.$normalid.'.last_cache'}=time;
1442: $envhash{'course.'.$normalid.'.home'}=$chome;
1443: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1444: $envhash{'course.'.$normalid.'.num'}=$cnum;
1445: &appenv(%envhash);
1446: return %returnhash;
1447: }
1448: }
1449: return ();
1450: }
1451:
1452: # -------------------------------------------------------- Get user privileges
1453:
1454: sub rolesinit {
1455: my ($domain,$username,$authhost)=@_;
1456: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1457: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1458: my %allroles=();
1459: my %thesepriv=();
1460: my $now=time;
1461: my $userroles="user.login.time=$now\n";
1462: my $thesestr;
1463:
1464: if ($rolesdump ne '') {
1465: foreach (split(/&/,$rolesdump)) {
1466: if ($_!~/^rolesdef\&/) {
1467: my ($area,$role)=split(/=/,$_);
1468: $area=~s/\_\w\w$//;
1469: my ($trole,$tend,$tstart)=split(/_/,$role);
1470: $userroles.='user.role.'.$trole.'.'.$area.'='.
1471: $tstart.'.'.$tend."\n";
1472: if ($tend!=0) {
1473: if ($tend<$now) {
1474: $trole='';
1475: }
1476: }
1477: if ($tstart!=0) {
1478: if ($tstart>$now) {
1479: $trole='';
1480: }
1481: }
1482: if (($area ne '') && ($trole ne '')) {
1483: my $spec=$trole.'.'.$area;
1484: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1485: if ($trole =~ /^cr\//) {
1486: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1487: my $homsvr=homeserver($rauthor,$rdomain);
1488: if ($hostname{$homsvr} ne '') {
1489: my $roledef=
1490: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1491: $homsvr);
1492: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1493: my ($syspriv,$dompriv,$coursepriv)=
1494: split(/\_/,unescape($roledef));
1495: $allroles{'cm./'}.=':'.$syspriv;
1496: $allroles{$spec.'./'}.=':'.$syspriv;
1497: if ($tdomain ne '') {
1498: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1499: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1500: if ($trest ne '') {
1501: $allroles{'cm.'.$area}.=':'.$coursepriv;
1502: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1503: }
1504: }
1505: }
1506: }
1507: } else {
1508: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1509: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1510: if ($tdomain ne '') {
1511: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1512: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1513: if ($trest ne '') {
1514: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1515: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1516: }
1517: }
1518: }
1519: }
1520: }
1521: }
1522: my $adv=0;
1523: my $author=0;
1524: foreach (keys %allroles) {
1525: %thesepriv=();
1526: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1527: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1528: foreach (split(/:/,$allroles{$_})) {
1529: if ($_ ne '') {
1530: my ($privilege,$restrictions)=split(/&/,$_);
1531: if ($restrictions eq '') {
1532: $thesepriv{$privilege}='F';
1533: } else {
1534: if ($thesepriv{$privilege} ne 'F') {
1535: $thesepriv{$privilege}.=$restrictions;
1536: }
1537: }
1538: }
1539: }
1540: $thesestr='';
1541: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1542: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1543: }
1544: $userroles.='user.adv='.$adv."\n".
1545: 'user.author='.$author."\n";
1546: $ENV{'user.adv'}=$adv;
1547: }
1548: return $userroles;
1549: }
1550:
1551: # --------------------------------------------------------------- get interface
1552:
1553: sub get {
1554: my ($namespace,$storearr,$udomain,$uname)=@_;
1555: my $items='';
1556: foreach (@$storearr) {
1557: $items.=escape($_).'&';
1558: }
1559: $items=~s/\&$//;
1560: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1561: if (!$uname) { $uname=$ENV{'user.name'}; }
1562: my $uhome=&homeserver($uname,$udomain);
1563:
1564: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1565: my @pairs=split(/\&/,$rep);
1566: my %returnhash=();
1567: my $i=0;
1568: foreach (@$storearr) {
1569: $returnhash{$_}=unescape($pairs[$i]);
1570: $i++;
1571: }
1572: return %returnhash;
1573: }
1574:
1575: # --------------------------------------------------------------- del interface
1576:
1577: sub del {
1578: my ($namespace,$storearr,$udomain,$uname)=@_;
1579: my $items='';
1580: foreach (@$storearr) {
1581: $items.=escape($_).'&';
1582: }
1583: $items=~s/\&$//;
1584: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1585: if (!$uname) { $uname=$ENV{'user.name'}; }
1586: my $uhome=&homeserver($uname,$udomain);
1587:
1588: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1589: }
1590:
1591: # -------------------------------------------------------------- dump interface
1592:
1593: sub dump {
1594: my ($namespace,$udomain,$uname,$regexp)=@_;
1595: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1596: if (!$uname) { $uname=$ENV{'user.name'}; }
1597: my $uhome=&homeserver($uname,$udomain);
1598: if ($regexp) {
1599: $regexp=&escape($regexp);
1600: } else {
1601: $regexp='.';
1602: }
1603: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1604: my @pairs=split(/\&/,$rep);
1605: my %returnhash=();
1606: foreach (@pairs) {
1607: my ($key,$value)=split(/=/,$_);
1608: $returnhash{unescape($key)}=unescape($value);
1609: }
1610: return %returnhash;
1611: }
1612:
1613: # --------------------------------------------------------------- put interface
1614:
1615: sub put {
1616: my ($namespace,$storehash,$udomain,$uname)=@_;
1617: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1618: if (!$uname) { $uname=$ENV{'user.name'}; }
1619: my $uhome=&homeserver($uname,$udomain);
1620: my $items='';
1621: foreach (keys %$storehash) {
1622: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1623: }
1624: $items=~s/\&$//;
1625: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1626: }
1627:
1628: # ------------------------------------------------------ critical put interface
1629:
1630: sub cput {
1631: my ($namespace,$storehash,$udomain,$uname)=@_;
1632: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1633: if (!$uname) { $uname=$ENV{'user.name'}; }
1634: my $uhome=&homeserver($uname,$udomain);
1635: my $items='';
1636: foreach (keys %$storehash) {
1637: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1638: }
1639: $items=~s/\&$//;
1640: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1641: }
1642:
1643: # -------------------------------------------------------------- eget interface
1644:
1645: sub eget {
1646: my ($namespace,$storearr,$udomain,$uname)=@_;
1647: my $items='';
1648: foreach (@$storearr) {
1649: $items.=escape($_).'&';
1650: }
1651: $items=~s/\&$//;
1652: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1653: if (!$uname) { $uname=$ENV{'user.name'}; }
1654: my $uhome=&homeserver($uname,$udomain);
1655: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1656: my @pairs=split(/\&/,$rep);
1657: my %returnhash=();
1658: my $i=0;
1659: foreach (@$storearr) {
1660: $returnhash{$_}=unescape($pairs[$i]);
1661: $i++;
1662: }
1663: return %returnhash;
1664: }
1665:
1666: # ------------------------------------------------- Check for a user privilege
1667:
1668: sub allowed {
1669: my ($priv,$uri)=@_;
1670:
1671: my $orguri=$uri;
1672: $uri=&declutter($uri);
1673:
1674: # Free bre access to adm and meta resources
1675:
1676: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1677: return 'F';
1678: }
1679:
1680: # Free bre to public access
1681:
1682: if ($priv eq 'bre') {
1683: my $copyright=&metadata($uri,'copyright');
1684: if ($copyright eq 'public') { return 'F'; }
1685: if ($copyright eq 'priv') {
1686: $uri=~/([^\/]+)\/([^\/]+)\//;
1687: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
1688: return '';
1689: }
1690: }
1691: if ($copyright eq 'domain') {
1692: $uri=~/([^\/]+)\/([^\/]+)\//;
1693: unless (($ENV{'user.domain'} eq $1) ||
1694: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
1695: return '';
1696: }
1697: }
1698: if ($ENV{'request.role'}=~ /li\.\//) {
1699: # Library role, so allow browsing of resources in this domain.
1700: return 'F';
1701: }
1702: }
1703: # Domain coordinator is trying to create a course
1704: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
1705: # uri is the requested domain in this case.
1706: # comparison to 'request.role.domain' shows if the user has selected
1707: # a role of dc for the domain in question.
1708: return 'F' if ($uri eq $ENV{'request.role.domain'});
1709: }
1710:
1711: my $thisallowed='';
1712: my $statecond=0;
1713: my $courseprivid='';
1714:
1715: # Course
1716:
1717: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1718: $thisallowed.=$1;
1719: }
1720:
1721: # Domain
1722:
1723: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1724: =~/$priv\&([^\:]*)/) {
1725: $thisallowed.=$1;
1726: }
1727:
1728: # Course: uri itself is a course
1729: my $courseuri=$uri;
1730: $courseuri=~s/\_(\d)/\/$1/;
1731: $courseuri=~s/^([^\/])/\/$1/;
1732:
1733: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1734: =~/$priv\&([^\:]*)/) {
1735: $thisallowed.=$1;
1736: }
1737:
1738: # Full access at system, domain or course-wide level? Exit.
1739:
1740: if ($thisallowed=~/F/) {
1741: return 'F';
1742: }
1743:
1744: # If this is generating or modifying users, exit with special codes
1745:
1746: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1747: return $thisallowed;
1748: }
1749: #
1750: # Gathered so far: system, domain and course wide privileges
1751: #
1752: # Course: See if uri or referer is an individual resource that is part of
1753: # the course
1754:
1755: if ($ENV{'request.course.id'}) {
1756:
1757: $courseprivid=$ENV{'request.course.id'};
1758: if ($ENV{'request.course.sec'}) {
1759: $courseprivid.='/'.$ENV{'request.course.sec'};
1760: }
1761: $courseprivid=~s/\_/\//;
1762: my $checkreferer=1;
1763: my ($match,$cond)=&is_on_map($uri);
1764: if ($match) {
1765: $statecond=$cond;
1766: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1767: =~/$priv\&([^\:]*)/) {
1768: $thisallowed.=$1;
1769: $checkreferer=0;
1770: }
1771: }
1772:
1773: if ($checkreferer) {
1774: my $refuri=$ENV{'httpref.'.$orguri};
1775: unless ($refuri) {
1776: foreach (keys %ENV) {
1777: if ($_=~/^httpref\..*\*/) {
1778: my $pattern=$_;
1779: $pattern=~s/^httpref\.\/res\///;
1780: $pattern=~s/\*/\[\^\/\]\+/g;
1781: $pattern=~s/\//\\\//g;
1782: if ($orguri=~/$pattern/) {
1783: $refuri=$ENV{$_};
1784: }
1785: }
1786: }
1787: }
1788:
1789: if ($refuri) {
1790: $refuri=&declutter($refuri);
1791: my ($match,$cond)=&is_on_map($refuri);
1792: if ($match) {
1793: my $refstatecond=$cond;
1794: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1795: =~/$priv\&([^\:]*)/) {
1796: $thisallowed.=$1;
1797: $uri=$refuri;
1798: $statecond=$refstatecond;
1799: }
1800: }
1801: }
1802: }
1803: }
1804:
1805: #
1806: # Gathered now: all privileges that could apply, and condition number
1807: #
1808: #
1809: # Full or no access?
1810: #
1811:
1812: if ($thisallowed=~/F/) {
1813: return 'F';
1814: }
1815:
1816: unless ($thisallowed) {
1817: return '';
1818: }
1819:
1820: # Restrictions exist, deal with them
1821: #
1822: # C:according to course preferences
1823: # R:according to resource settings
1824: # L:unless locked
1825: # X:according to user session state
1826: #
1827:
1828: # Possibly locked functionality, check all courses
1829: # Locks might take effect only after 10 minutes cache expiration for other
1830: # courses, and 2 minutes for current course
1831:
1832: my $envkey;
1833: if ($thisallowed=~/L/) {
1834: foreach $envkey (keys %ENV) {
1835: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1836: my $courseid=$2;
1837: my $roleid=$1.'.'.$2;
1838: $courseid=~s/^\///;
1839: my $expiretime=600;
1840: if ($ENV{'request.role'} eq $roleid) {
1841: $expiretime=120;
1842: }
1843: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1844: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1845: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1846: &coursedescription($courseid);
1847: }
1848: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1849: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1850: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1851: &log($ENV{'user.domain'},$ENV{'user.name'},
1852: $ENV{'user.home'},
1853: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1854: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1855: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1856: return '';
1857: }
1858: }
1859: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1860: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1861: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1862: &log($ENV{'user.domain'},$ENV{'user.name'},
1863: $ENV{'user.home'},
1864: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1865: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1866: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1867: return '';
1868: }
1869: }
1870: }
1871: }
1872: }
1873:
1874: #
1875: # Rest of the restrictions depend on selected course
1876: #
1877:
1878: unless ($ENV{'request.course.id'}) {
1879: return '1';
1880: }
1881:
1882: #
1883: # Now user is definitely in a course
1884: #
1885:
1886:
1887: # Course preferences
1888:
1889: if ($thisallowed=~/C/) {
1890: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1891: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
1892: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1893: =~/$rolecode/) {
1894: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1895: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1896: $ENV{'request.course.id'});
1897: return '';
1898: }
1899:
1900: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
1901: =~/$unamedom/) {
1902: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1903: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
1904: $ENV{'request.course.id'});
1905: return '';
1906: }
1907: }
1908:
1909: # Resource preferences
1910:
1911: if ($thisallowed=~/R/) {
1912: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1913: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1914: if (-e $filename) {
1915: my @content;
1916: {
1917: my $fh=Apache::File->new($filename);
1918: @content=<$fh>;
1919: }
1920: if (join('',@content)=~
1921: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1922: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1923: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1924: return '';
1925:
1926: }
1927: }
1928: }
1929:
1930: # Restricted by state or randomout?
1931:
1932: if ($thisallowed=~/X/) {
1933: if ($ENV{'acc.randomout'}) {
1934: my $symb=&symbread($uri,1);
1935: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
1936: return '';
1937: }
1938: }
1939: if (&condval($statecond)) {
1940: return '2';
1941: } else {
1942: return '';
1943: }
1944: }
1945:
1946: return 'F';
1947: }
1948:
1949: # --------------------------------------------------- Is a resource on the map?
1950:
1951: sub is_on_map {
1952: my $uri=&declutter(shift);
1953: my @uriparts=split(/\//,$uri);
1954: my $filename=$uriparts[$#uriparts];
1955: my $pathname=$uri;
1956: $pathname=~s/\/$filename$//;
1957: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1958: /\&$filename\:([\d\|]+)\&/);
1959: if ($match) {
1960: return (1,$1);
1961: } else {
1962: return (0,0);
1963: }
1964: }
1965:
1966: # ----------------------------------------------------------------- Define Role
1967:
1968: sub definerole {
1969: if (allowed('mcr','/')) {
1970: my ($rolename,$sysrole,$domrole,$courole)=@_;
1971: foreach (split('/',$sysrole)) {
1972: my ($crole,$cqual)=split(/\&/,$_);
1973: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1974: if ($pr{'cr:s'}=~/$crole\&/) {
1975: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1976: return "refused:s:$crole&$cqual";
1977: }
1978: }
1979: }
1980: foreach (split('/',$domrole)) {
1981: my ($crole,$cqual)=split(/\&/,$_);
1982: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1983: if ($pr{'cr:d'}=~/$crole\&/) {
1984: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1985: return "refused:d:$crole&$cqual";
1986: }
1987: }
1988: }
1989: foreach (split('/',$courole)) {
1990: my ($crole,$cqual)=split(/\&/,$_);
1991: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1992: if ($pr{'cr:c'}=~/$crole\&/) {
1993: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1994: return "refused:c:$crole&$cqual";
1995: }
1996: }
1997: }
1998: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1999: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2000: "rolesdef_$rolename=".
2001: escape($sysrole.'_'.$domrole.'_'.$courole);
2002: return reply($command,$ENV{'user.home'});
2003: } else {
2004: return 'refused';
2005: }
2006: }
2007:
2008: # ---------------- Make a metadata query against the network of library servers
2009:
2010: sub metadata_query {
2011: my ($query,$custom,$customshow,$server_array)=@_;
2012: my %rhash;
2013: my @server_list = (defined($server_array) ? @$server_array
2014: : keys(%libserv) );
2015: for my $server (@server_list) {
2016: unless ($custom or $customshow) {
2017: my $reply=&reply("querysend:".&escape($query),$server);
2018: $rhash{$server}=$reply;
2019: }
2020: else {
2021: my $reply=&reply("querysend:".&escape($query).':'.
2022: &escape($custom).':'.&escape($customshow),
2023: $server);
2024: $rhash{$server}=$reply;
2025: }
2026: }
2027: return \%rhash;
2028: }
2029:
2030: # ----------------------------------------- Send log queries and wait for reply
2031:
2032: sub log_query {
2033: my ($uname,$udom,$query,%filters)=@_;
2034: my $uhome=&homeserver($uname,$udom);
2035: if ($uhome eq 'no_host') { return 'error: no_host'; }
2036: my $uhost=$hostname{$uhome};
2037: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2038: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2039: $uhome);
2040: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2041: return get_query_reply($queryid);
2042: }
2043:
2044: sub get_query_reply {
2045: my $queryid=shift;
2046: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2047: my $reply='';
2048: for (1..100) {
2049: sleep 2;
2050: if (-e $replyfile.'.end') {
2051: if (my $fh=Apache::File->new($replyfile)) {
2052: $reply.=<$fh>;
2053: $fh->close;
2054: } else { return 'error: reply_file_error'; }
2055: return &unescape($reply);
2056: }
2057: }
2058: return 'timeout:'.$queryid;
2059: }
2060:
2061: sub courselog_query {
2062: #
2063: # possible filters:
2064: # url: url or symb
2065: # username
2066: # domain
2067: # action: view, submit, grade
2068: # start: timestamp
2069: # end: timestamp
2070: #
2071: my (%filters)=@_;
2072: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2073: if ($filters{'url'}) {
2074: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2075: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2076: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2077: }
2078: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2079: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2080: return &log_query($cname,$cdom,'courselog',%filters);
2081: }
2082:
2083: sub userlog_query {
2084: my ($uname,$udom,%filters)=@_;
2085: return &log_query($uname,$udom,'userlog',%filters);
2086: }
2087:
2088: # ------------------------------------------------------------------ Plain Text
2089:
2090: sub plaintext {
2091: my $short=shift;
2092: return $prp{$short};
2093: }
2094:
2095: # ----------------------------------------------------------------- Assign Role
2096:
2097: sub assignrole {
2098: my ($udom,$uname,$url,$role,$end,$start)=@_;
2099: my $mrole;
2100: if ($role =~ /^cr\//) {
2101: unless (&allowed('ccr',$url)) {
2102: &logthis('Refused custom assignrole: '.
2103: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2104: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2105: return 'refused';
2106: }
2107: $mrole='cr';
2108: } else {
2109: my $cwosec=$url;
2110: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2111: unless (&allowed('c'.$role,$cwosec)) {
2112: &logthis('Refused assignrole: '.
2113: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2114: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2115: return 'refused';
2116: }
2117: $mrole=$role;
2118: }
2119: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2120: "$udom:$uname:$url".'_'."$mrole=$role";
2121: if ($end) { $command.='_'.$end; }
2122: if ($start) {
2123: if ($end) {
2124: $command.='_'.$start;
2125: } else {
2126: $command.='_0_'.$start;
2127: }
2128: }
2129: return &reply($command,&homeserver($uname,$udom));
2130: }
2131:
2132: # -------------------------------------------------- Modify user authentication
2133: # Overrides without validation
2134:
2135: sub modifyuserauth {
2136: my ($udom,$uname,$umode,$upass)=@_;
2137: my $uhome=&homeserver($uname,$udom);
2138: unless (&allowed('mau',$udom)) { return 'refused'; }
2139: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2140: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
2141: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2142: &escape($upass),$uhome);
2143: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2144: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2145: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2146: &log($udom,,$uname,$uhome,
2147: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2148: $ENV{'user.name'}.', '.$umode.
2149: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2150: unless ($reply eq 'ok') {
2151: &logthis('Authentication mode error: '.$reply);
2152: return 'error: '.$reply;
2153: }
2154: return 'ok';
2155: }
2156:
2157: # --------------------------------------------------------------- Modify a user
2158:
2159: sub modifyuser {
2160: my ($udom, $uname, $uid,
2161: $umode, $upass, $first,
2162: $middle, $last, $gene,
2163: $forceid, $desiredhome)=@_;
2164: $udom=~s/\W//g;
2165: $uname=~s/\W//g;
2166: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2167: $umode.', '.$first.', '.$middle.', '.
2168: $last.', '.$gene.'(forceid: '.$forceid.')'.
2169: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2170: ' desiredhome not specified').
2171: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
2172: my $uhome=&homeserver($uname,$udom,'true');
2173: # ----------------------------------------------------------------- Create User
2174: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2175: my $unhome='';
2176: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2177: $unhome = $desiredhome;
2178: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2179: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2180: } else { # load balancing routine for determining $unhome
2181: my $tryserver;
2182: my $loadm=10000000;
2183: foreach $tryserver (keys %libserv) {
2184: if ($hostdom{$tryserver} eq $udom) {
2185: my $answer=reply('load',$tryserver);
2186: if (($answer=~/\d+/) && ($answer<$loadm)) {
2187: $loadm=$answer;
2188: $unhome=$tryserver;
2189: }
2190: }
2191: }
2192: }
2193: if (($unhome eq '') || ($unhome eq 'no_host')) {
2194: return 'error: unable to find a home server for '.$uname.
2195: ' in domain '.$udom;
2196: }
2197: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2198: &escape($upass),$unhome);
2199: unless ($reply eq 'ok') {
2200: return 'error: '.$reply;
2201: }
2202: $uhome=&homeserver($uname,$udom,'true');
2203: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2204: return 'error: verify home';
2205: }
2206: } # End of creation of new user
2207: # ---------------------------------------------------------------------- Add ID
2208: if ($uid) {
2209: $uid=~tr/A-Z/a-z/;
2210: my %uidhash=&idrget($udom,$uname);
2211: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2212: && (!$forceid)) {
2213: unless ($uid eq $uidhash{$uname}) {
2214: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2215: }
2216: } else {
2217: &idput($udom,($uname => $uid));
2218: }
2219: }
2220: # -------------------------------------------------------------- Add names, etc
2221: my %names=&get('environment',
2222: ['firstname','middlename','lastname','generation'],
2223: $udom,$uname);
2224: if ($names{'firstname'} =~ m/^error:.*/) { %names=(); }
2225: if ($first) { $names{'firstname'} = $first; }
2226: if ($middle) { $names{'middlename'} = $middle; }
2227: if ($last) { $names{'lastname'} = $last; }
2228: if ($gene) { $names{'generation'} = $gene; }
2229: my $reply = &put('environment', \%names, $udom,$uname);
2230: if ($reply ne 'ok') { return 'error: '.$reply; }
2231: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2232: $umode.', '.$first.', '.$middle.', '.
2233: $last.', '.$gene.' by '.
2234: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2235: return 'ok';
2236: }
2237:
2238: # -------------------------------------------------------------- Modify student
2239:
2240: sub modifystudent {
2241: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2242: $end,$start,$forceid,$desiredhome)=@_;
2243: my $cid='';
2244: unless ($cid=$ENV{'request.course.id'}) {
2245: return 'not_in_class';
2246: }
2247: # --------------------------------------------------------------- Make the user
2248: my $reply=&modifyuser
2249: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2250: $desiredhome);
2251: unless ($reply eq 'ok') { return $reply; }
2252: my $uhome=&homeserver($uname,$udom);
2253: if (($uhome eq '') || ($uhome eq 'no_host')) {
2254: return 'error: no such user';
2255: }
2256: # -------------------------------------------------- Add student to course list
2257: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2258: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2259: &escape($uname.':'.$udom).'='.
2260: &escape($end.':'.$start),
2261: $ENV{'course.'.$cid.'.home'});
2262: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2263: return 'error: '.$reply;
2264: }
2265: # ---------------------------------------------------- Add student role to user
2266: my $uurl='/'.$cid;
2267: $uurl=~s/\_/\//g;
2268: if ($usec) {
2269: $uurl.='/'.$usec;
2270: }
2271: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2272: }
2273:
2274: # ------------------------------------------------- Write to course preferences
2275:
2276: sub writecoursepref {
2277: my ($courseid,%prefs)=@_;
2278: $courseid=~s/^\///;
2279: $courseid=~s/\_/\//g;
2280: my ($cdomain,$cnum)=split(/\//,$courseid);
2281: my $chome=homeserver($cnum,$cdomain);
2282: if (($chome eq '') || ($chome eq 'no_host')) {
2283: return 'error: no such course';
2284: }
2285: my $cstring='';
2286: foreach (keys %prefs) {
2287: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2288: }
2289: $cstring=~s/\&$//;
2290: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2291: }
2292:
2293: # ---------------------------------------------------------- Make/modify course
2294:
2295: sub createcourse {
2296: my ($udom,$description,$url,$course_server)=@_;
2297: $url=&declutter($url);
2298: my $cid='';
2299: unless (&allowed('ccc',$udom)) {
2300: return 'refused';
2301: }
2302: # ------------------------------------------------------------------- Create ID
2303: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2304: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2305: # ----------------------------------------------- Make sure that does not exist
2306: my $uhome=&homeserver($uname,$udom,'true');
2307: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2308: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2309: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2310: $uhome=&homeserver($uname,$udom,'true');
2311: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2312: return 'error: unable to generate unique course-ID';
2313: }
2314: }
2315: # ------------------------------------------------ Check supplied server name
2316: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2317: if (! exists($libserv{$course_server})) {
2318: return 'error:bad server name '.$course_server;
2319: }
2320: # ------------------------------------------------------------- Make the course
2321: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2322: $course_server);
2323: unless ($reply eq 'ok') { return 'error: '.$reply; }
2324: $uhome=&homeserver($uname,$udom,'true');
2325: if (($uhome eq '') || ($uhome eq 'no_host')) {
2326: return 'error: no such course';
2327: }
2328: &writecoursepref($udom.'_'.$uname,
2329: ('description' => $description,
2330: 'url' => $url));
2331: return '/'.$udom.'/'.$uname;
2332: }
2333:
2334: # ---------------------------------------------------------- Assign Custom Role
2335:
2336: sub assigncustomrole {
2337: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2338: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2339: $end,$start);
2340: }
2341:
2342: # ----------------------------------------------------------------- Revoke Role
2343:
2344: sub revokerole {
2345: my ($udom,$uname,$url,$role)=@_;
2346: my $now=time;
2347: return &assignrole($udom,$uname,$url,$role,$now);
2348: }
2349:
2350: # ---------------------------------------------------------- Revoke Custom Role
2351:
2352: sub revokecustomrole {
2353: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2354: my $now=time;
2355: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2356: }
2357:
2358: # ------------------------------------------------------------ Directory lister
2359:
2360: sub dirlist {
2361: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2362:
2363: $uri=~s/^\///;
2364: $uri=~s/\/$//;
2365: my ($udom, $uname);
2366: (undef,$udom,$uname)=split(/\//,$uri);
2367: if(defined($userdomain)) {
2368: $udom = $userdomain;
2369: }
2370: if(defined($username)) {
2371: $uname = $username;
2372: }
2373:
2374: my $dirRoot = $perlvar{'lonDocRoot'};
2375: if(defined($alternateDirectoryRoot)) {
2376: $dirRoot = $alternateDirectoryRoot;
2377: $dirRoot =~ s/\/$//;
2378: }
2379:
2380: if($udom) {
2381: if($uname) {
2382: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2383: homeserver($uname,$udom));
2384: return split(/:/,$listing);
2385: } elsif(!defined($alternateDirectoryRoot)) {
2386: my $tryserver;
2387: my %allusers=();
2388: foreach $tryserver (keys %libserv) {
2389: if($hostdom{$tryserver} eq $udom) {
2390: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2391: $udom, $tryserver);
2392: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2393: && ($listing ne 'con_lost')) {
2394: foreach (split(/:/,$listing)) {
2395: my ($entry,@stat)=split(/&/,$_);
2396: $allusers{$entry}=1;
2397: }
2398: }
2399: }
2400: }
2401: my $alluserstr='';
2402: foreach (sort keys %allusers) {
2403: $alluserstr.=$_.'&user:';
2404: }
2405: $alluserstr=~s/:$//;
2406: return split(/:/,$alluserstr);
2407: } else {
2408: my @emptyResults = ();
2409: push(@emptyResults, 'missing user name');
2410: return split(':',@emptyResults);
2411: }
2412: } elsif(!defined($alternateDirectoryRoot)) {
2413: my $tryserver;
2414: my %alldom=();
2415: foreach $tryserver (keys %libserv) {
2416: $alldom{$hostdom{$tryserver}}=1;
2417: }
2418: my $alldomstr='';
2419: foreach (sort keys %alldom) {
2420: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2421: }
2422: $alldomstr=~s/:$//;
2423: return split(/:/,$alldomstr);
2424: } else {
2425: my @emptyResults = ();
2426: push(@emptyResults, 'missing domain');
2427: return split(':',@emptyResults);
2428: }
2429: }
2430:
2431: # -------------------------------------------------------- Value of a Condition
2432:
2433: sub directcondval {
2434: my $number=shift;
2435: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2436: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2437: } else {
2438: return 2;
2439: }
2440: }
2441:
2442: sub condval {
2443: my $condidx=shift;
2444: my $result=0;
2445: my $allpathcond='';
2446: foreach (split(/\|/,$condidx)) {
2447: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2448: $allpathcond.=
2449: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2450: }
2451: }
2452: $allpathcond=~s/\|$//;
2453: if ($ENV{'request.course.id'}) {
2454: if ($allpathcond) {
2455: my $operand='|';
2456: my @stack;
2457: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2458: if ($_ eq '(') {
2459: push @stack,($operand,$result)
2460: } elsif ($_ eq ')') {
2461: my $before=pop @stack;
2462: if (pop @stack eq '&') {
2463: $result=$result>$before?$before:$result;
2464: } else {
2465: $result=$result>$before?$result:$before;
2466: }
2467: } elsif (($_ eq '&') || ($_ eq '|')) {
2468: $operand=$_;
2469: } else {
2470: my $new=directcondval($_);
2471: if ($operand eq '&') {
2472: $result=$result>$new?$new:$result;
2473: } else {
2474: $result=$result>$new?$result:$new;
2475: }
2476: }
2477: }
2478: }
2479: }
2480: return $result;
2481: }
2482:
2483: # --------------------------------------------------- Course Resourcedata Query
2484:
2485: sub courseresdata {
2486: my ($coursenum,$coursedomain,@which)=@_;
2487: my $coursehom=&homeserver($coursenum,$coursedomain);
2488: my $hashid=$coursenum.':'.$coursedomain;
2489: my $dodump=0;
2490: if (!defined($courseresdatacache{$hashid.'.time'})) {
2491: $dodump=1;
2492: } else {
2493: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2494: }
2495: if ($dodump) {
2496: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2497: my ($tmp) = keys(%dumpreply);
2498: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2499: $courseresdatacache{$hashid.'.time'}=time;
2500: $courseresdatacache{$hashid}=\%dumpreply;
2501: }
2502: }
2503: foreach my $item (@which) {
2504: if ($courseresdatacache{$hashid}->{$item}) {
2505: return $courseresdatacache{$hashid}->{$item};
2506: }
2507: }
2508: return '';
2509: }
2510:
2511: # --------------------------------------------------------- Value of a Variable
2512:
2513: sub EXT {
2514: my ($varname,$symbparm,$udom,$uname)=@_;
2515:
2516: unless ($varname) { return ''; }
2517:
2518: #get real user name/domain, courseid and symb
2519: my $courseid;
2520: if (!($uname && $udom)) {
2521: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2522: if (!$symbparm) { $symbparm=$cursymb; }
2523: } else {
2524: $courseid=$ENV{'request.course.id'};
2525: }
2526:
2527: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2528: my $rest;
2529: if ($therest[0]) {
2530: $rest=join('.',@therest);
2531: } else {
2532: $rest='';
2533: }
2534: my $qualifierrest=$qualifier;
2535: if ($rest) { $qualifierrest.='.'.$rest; }
2536: my $spacequalifierrest=$space;
2537: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2538: if ($realm eq 'user') {
2539: # --------------------------------------------------------------- user.resource
2540: if ($space eq 'resource') {
2541: my %restored=&restore(undef,undef,$udom,$uname);
2542: return $restored{$qualifierrest};
2543: # ----------------------------------------------------------------- user.access
2544: } elsif ($space eq 'access') {
2545: # FIXME - not supporting calls for a specific user
2546: return &allowed($qualifier,$rest);
2547: # ------------------------------------------ user.preferences, user.environment
2548: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2549: if (($uname eq $ENV{'user.name'}) &&
2550: ($udom eq $ENV{'user.domain'})) {
2551: return $ENV{join('.',('environment',$qualifierrest))};
2552: } else {
2553: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2554: return $returnhash{$qualifierrest};
2555: }
2556: # ----------------------------------------------------------------- user.course
2557: } elsif ($space eq 'course') {
2558: # FIXME - not supporting calls for a specific user
2559: return $ENV{join('.',('request.course',$qualifier))};
2560: # ------------------------------------------------------------------- user.role
2561: } elsif ($space eq 'role') {
2562: # FIXME - not supporting calls for a specific user
2563: my ($role,$where)=split(/\./,$ENV{'request.role'});
2564: if ($qualifier eq 'value') {
2565: return $role;
2566: } elsif ($qualifier eq 'extent') {
2567: return $where;
2568: }
2569: # ----------------------------------------------------------------- user.domain
2570: } elsif ($space eq 'domain') {
2571: return $udom;
2572: # ------------------------------------------------------------------- user.name
2573: } elsif ($space eq 'name') {
2574: return $uname;
2575: # ---------------------------------------------------- Any other user namespace
2576: } else {
2577: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2578: my %reply=&get($space,[$item]);
2579: return $reply{$item};
2580: }
2581: } elsif ($realm eq 'query') {
2582: # ---------------------------------------------- pull stuff out of query string
2583: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
2584: return $ENV{'form.'.$space};
2585: } elsif ($realm eq 'request') {
2586: # ------------------------------------------------------------- request.browser
2587: if ($space eq 'browser') {
2588: return $ENV{'browser.'.$qualifier};
2589: # ------------------------------------------------------------ request.filename
2590: } else {
2591: return $ENV{'request.'.$spacequalifierrest};
2592: }
2593: } elsif ($realm eq 'course') {
2594: # ---------------------------------------------------------- course.description
2595: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
2596: } elsif ($realm eq 'resource') {
2597:
2598: if ($courseid eq $ENV{'request.course.id'}) {
2599:
2600: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2601:
2602: # ----------------------------------------------------- Cascading lookup scheme
2603: if (!$symbparm) { $symbparm=&symbread(); }
2604: my $symbp=$symbparm;
2605: my $mapp=(split(/\_\_\_/,$symbp))[0];
2606:
2607: my $symbparm=$symbp.'.'.$spacequalifierrest;
2608: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2609:
2610: my $section;
2611: if (($ENV{'user.name'} eq $uname) &&
2612: ($ENV{'user.domain'} eq $udom)) {
2613: $section=$ENV{'request.course.sec'};
2614: } else {
2615: $section=&usection($udom,$uname,$courseid);
2616: }
2617:
2618: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
2619: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
2620: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
2621:
2622: my $courselevel=$courseid.'.'.$spacequalifierrest;
2623: my $courselevelr=$courseid.'.'.$symbparm;
2624: my $courselevelm=$courseid.'.'.$mapparm;
2625:
2626: # ----------------------------------------------------------- first, check user
2627: my %resourcedata=&get('resourcedata',
2628: [$courselevelr,$courselevelm,$courselevel],
2629: $udom,$uname);
2630: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2631: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2632:
2633: if ($resourcedata{$courselevelr}) {
2634: return $resourcedata{$courselevelr}; }
2635: if ($resourcedata{$courselevelm}) {
2636: return $resourcedata{$courselevelm}; }
2637: if ($resourcedata{$courselevel}) {
2638: return $resourcedata{$courselevel}; }
2639: } else {
2640: if ($resourcedata{$courselevelr}!~/No such file/) {
2641: &logthis("<font color=blue>WARNING:".
2642: " Trying to get resource data for ".
2643: $uname." at ".$udom.": ".
2644: $resourcedata{$courselevelr}."</font>");
2645: }
2646: }
2647:
2648: # -------------------------------------------------------- second, check course
2649:
2650: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
2651: $ENV{'course.'.$courseid.'.domain'},
2652: ($seclevelr,$seclevelm,$seclevel,
2653: $courselevelr,$courselevelm,
2654: $courselevel));
2655: if ($coursereply) { return $coursereply; }
2656:
2657: # ------------------------------------------------------ third, check map parms
2658: my %parmhash=();
2659: my $thisparm='';
2660: if (tie(%parmhash,'GDBM_File',
2661: $ENV{'request.course.fn'}.'_parms.db',
2662: &GDBM_READER(),0640)) {
2663: $thisparm=$parmhash{$symbparm};
2664: untie(%parmhash);
2665: }
2666: if ($thisparm) { return $thisparm; }
2667: }
2668: # --------------------------------------------- last, look in resource metadata
2669:
2670: $spacequalifierrest=~s/\./\_/;
2671: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2672: if ($metadata) { return $metadata; }
2673: $metadata=&metadata($ENV{'request.filename'},
2674: 'parameter_'.$spacequalifierrest);
2675: if ($metadata) { return $metadata; }
2676:
2677: # ------------------------------------------------------------------ Cascade up
2678: unless ($space eq '0') {
2679: my ($part,$id)=split(/\_/,$space);
2680: if ($id) {
2681: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2682: $symbparm,$udom,$uname);
2683: if ($partgeneral) { return $partgeneral; }
2684: } else {
2685: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2686: $symbparm,$udom,$uname);
2687: if ($resourcegeneral) { return $resourcegeneral; }
2688: }
2689: }
2690:
2691: # ---------------------------------------------------- Any other user namespace
2692: } elsif ($realm eq 'environment') {
2693: # ----------------------------------------------------------------- environment
2694: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
2695: return $ENV{'environment.'.$spacequalifierrest};
2696: } else {
2697: my %returnhash=&userenvironment($udom,$uname,
2698: $spacequalifierrest);
2699: return $returnhash{$spacequalifierrest};
2700: }
2701: } elsif ($realm eq 'system') {
2702: # ----------------------------------------------------------------- system.time
2703: if ($space eq 'time') {
2704: return time;
2705: }
2706: }
2707: return '';
2708: }
2709:
2710: # ---------------------------------------------------------------- Get metadata
2711:
2712: sub metadata {
2713: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2714:
2715: $uri=&declutter($uri);
2716: my $filename=$uri;
2717: $uri=~s/\.meta$//;
2718: #
2719: # Is the metadata already cached?
2720: # Look at timestamp of caching
2721: # Everything is cached by the main uri, libraries are never directly cached
2722: #
2723: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2724: #
2725: # Is this a recursive call for a library?
2726: #
2727: if ($liburi) {
2728: $liburi=&declutter($liburi);
2729: $filename=$liburi;
2730: }
2731: my %metathesekeys=();
2732: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2733: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2734: my $parser=HTML::LCParser->new(\$metastring);
2735: my $token;
2736: undef %metathesekeys;
2737: while ($token=$parser->get_token) {
2738: if ($token->[0] eq 'S') {
2739: if (defined($token->[2]->{'package'})) {
2740: #
2741: # This is a package - get package info
2742: #
2743: my $package=$token->[2]->{'package'};
2744: my $keyroot='';
2745: if ($prefix) {
2746: $keyroot.='_'.$prefix;
2747: } else {
2748: if (defined($token->[2]->{'part'})) {
2749: $keyroot.='_'.$token->[2]->{'part'};
2750: }
2751: }
2752: if (defined($token->[2]->{'id'})) {
2753: $keyroot.='_'.$token->[2]->{'id'};
2754: }
2755: if ($metacache{$uri.':packages'}) {
2756: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2757: } else {
2758: $metacache{$uri.':packages'}=$package.$keyroot;
2759: }
2760: foreach (keys %packagetab) {
2761: if ($_=~/^$package\&/) {
2762: my ($pack,$name,$subp)=split(/\&/,$_);
2763: my $value=$packagetab{$_};
2764: my $part=$keyroot;
2765: $part=~s/^\_//;
2766: if ($subp eq 'display') {
2767: $value.=' [Part: '.$part.']';
2768: }
2769: my $unikey='parameter'.$keyroot.'_'.$name;
2770: $metathesekeys{$unikey}=1;
2771: $metacache{$uri.':'.$unikey.'.part'}=$part;
2772: unless
2773: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2774: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2775: }
2776: }
2777: }
2778: } else {
2779: #
2780: # This is not a package - some other kind of start tag
2781: #
2782: my $entry=$token->[1];
2783: my $unikey;
2784: if ($entry eq 'import') {
2785: $unikey='';
2786: } else {
2787: $unikey=$entry;
2788: }
2789: if ($prefix) {
2790: $unikey.=$prefix;
2791: } else {
2792: if (defined($token->[2]->{'part'})) {
2793: $unikey.='_'.$token->[2]->{'part'};
2794: }
2795: }
2796: if (defined($token->[2]->{'id'})) {
2797: $unikey.='_'.$token->[2]->{'id'};
2798: }
2799:
2800: if ($entry eq 'import') {
2801: #
2802: # Importing a library here
2803: #
2804: if (defined($depthcount)) { $depthcount++; } else
2805: { $depthcount=0; }
2806: if ($depthcount<20) {
2807: foreach (split(/\,/,&metadata($uri,'keys',
2808: $parser->get_text('/import'),$unikey,
2809: $depthcount))) {
2810: $metathesekeys{$_}=1;
2811: }
2812: }
2813: } else {
2814:
2815: if (defined($token->[2]->{'name'})) {
2816: $unikey.='_'.$token->[2]->{'name'};
2817: }
2818: $metathesekeys{$unikey}=1;
2819: foreach (@{$token->[3]}) {
2820: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2821: }
2822: unless (
2823: $metacache{$uri.':'.$unikey}=&HTML::Entities::decode($parser->get_text('/'.$entry))
2824: ) { $metacache{$uri.':'.$unikey}=
2825: $metacache{$uri.':'.$unikey.'.default'};
2826: }
2827: # end of not-a-package not-a-library import
2828: }
2829: # end of not-a-package start tag
2830: }
2831: # the next is the end of "start tag"
2832: }
2833: }
2834: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
2835: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2836: $metacache{$uri.':cachedtimestamp'}=time;
2837: # this is the end of "was not already recently cached
2838: }
2839: return $metacache{$uri.':'.$what};
2840: }
2841:
2842: sub metadata_generate_part0 {
2843: my ($metadata,$metacache,$uri) = @_;
2844: my %allnames;
2845: foreach my $metakey (sort keys %$metadata) {
2846: if ($metakey=~/^parameter\_(.*)/) {
2847: my $part=$$metacache{$uri.':'.$metakey.'.part'};
2848: my $name=$$metacache{$uri.':'.$metakey.'.name'};
2849: if (! exists($$metadata{'parameter_0_'.$name})) {
2850: $allnames{$name}=$part;
2851: }
2852: }
2853: }
2854: foreach my $name (keys(%allnames)) {
2855: $$metadata{"parameter_0_$name"}=1;
2856: my $key="$uri:parameter_0_$name";
2857: $$metacache{"$key.part"}='0';
2858: $$metacache{"$key.name"}=$name;
2859: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
2860: $allnames{$name}.'_'.$name.
2861: '.type'};
2862: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
2863: '.display'};
2864: my $expr='\\[Part: '.$allnames{$name}.'\\]';
2865: $olddis=~s/$expr/\[Part: 0\]/;
2866: $$metacache{"$key.display"}=$olddis;
2867: }
2868: }
2869:
2870: # ------------------------------------------------- Update symbolic store links
2871:
2872: sub symblist {
2873: my ($mapname,%newhash)=@_;
2874: $mapname=declutter($mapname);
2875: my %hash;
2876: if (($ENV{'request.course.fn'}) && (%newhash)) {
2877: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2878: &GDBM_WRCREAT(),0640)) {
2879: foreach (keys %newhash) {
2880: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2881: }
2882: if (untie(%hash)) {
2883: return 'ok';
2884: }
2885: }
2886: }
2887: return 'error';
2888: }
2889:
2890: # --------------------------------------------------------------- Verify a symb
2891:
2892: sub symbverify {
2893: my ($symb,$thisfn)=@_;
2894: $thisfn=&declutter($thisfn);
2895: # direct jump to resource in page or to a sequence - will construct own symbs
2896: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
2897: # check URL part
2898: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
2899: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
2900:
2901: $symb=&symbclean($symb);
2902:
2903: my %bighash;
2904: my $okay=0;
2905: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2906: &GDBM_READER(),0640)) {
2907: my $ids=$bighash{'ids_/res/'.$thisfn};
2908: unless ($ids) {
2909: $ids=$bighash{'ids_/'.$thisfn};
2910: }
2911: if ($ids) {
2912: # ------------------------------------------------------------------- Has ID(s)
2913: foreach (split(/\,/,$ids)) {
2914: my ($mapid,$resid)=split(/\./,$_);
2915: if (
2916: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
2917: eq $symb) {
2918: $okay=1;
2919: }
2920: }
2921: }
2922: untie(%bighash);
2923: }
2924: return $okay;
2925: }
2926:
2927: # --------------------------------------------------------------- Clean-up symb
2928:
2929: sub symbclean {
2930: my $symb=shift;
2931:
2932: # remove version from map
2933: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
2934:
2935: # remove version from URL
2936: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
2937:
2938: return $symb;
2939: }
2940:
2941: # ------------------------------------------------------ Return symb list entry
2942:
2943: sub symbread {
2944: my ($thisfn,$donotrecurse)=@_;
2945: # no filename provided? try from environment
2946: unless ($thisfn) {
2947: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
2948: $thisfn=$ENV{'request.filename'};
2949: }
2950: # is that filename actually a symb? Verify, clean, and return
2951: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
2952: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
2953: }
2954: $thisfn=declutter($thisfn);
2955: my %hash;
2956: my %bighash;
2957: my $syval='';
2958: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2959: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2960: &GDBM_READER(),0640)) {
2961: $syval=$hash{$thisfn};
2962: untie(%hash);
2963: }
2964: # ---------------------------------------------------------- There was an entry
2965: if ($syval) {
2966: unless ($syval=~/\_\d+$/) {
2967: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2968: &appenv('request.ambiguous' => $thisfn);
2969: return '';
2970: }
2971: $syval.=$1;
2972: }
2973: } else {
2974: # ------------------------------------------------------- Was not in symb table
2975: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2976: &GDBM_READER(),0640)) {
2977: # ---------------------------------------------- Get ID(s) for current resource
2978: my $ids=$bighash{'ids_/res/'.$thisfn};
2979: unless ($ids) {
2980: $ids=$bighash{'ids_/'.$thisfn};
2981: }
2982: unless ($ids) {
2983: # alias?
2984: $ids=$bighash{'mapalias_'.$thisfn};
2985: }
2986: if ($ids) {
2987: # ------------------------------------------------------------------- Has ID(s)
2988: my @possibilities=split(/\,/,$ids);
2989: if ($#possibilities==0) {
2990: # ----------------------------------------------- There is only one possibility
2991: my ($mapid,$resid)=split(/\./,$ids);
2992: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2993: } elsif (!$donotrecurse) {
2994: # ------------------------------------------ There is more than one possibility
2995: my $realpossible=0;
2996: foreach (@possibilities) {
2997: my $file=$bighash{'src_'.$_};
2998: if (&allowed('bre',$file)) {
2999: my ($mapid,$resid)=split(/\./,$_);
3000: if ($bighash{'map_type_'.$mapid} ne 'page') {
3001: $realpossible++;
3002: $syval=declutter($bighash{'map_id_'.$mapid}).
3003: '___'.$resid;
3004: }
3005: }
3006: }
3007: if ($realpossible!=1) { $syval=''; }
3008: } else {
3009: $syval='';
3010: }
3011: }
3012: untie(%bighash)
3013: }
3014: }
3015: if ($syval) {
3016: return &symbclean($syval.'___'.$thisfn);
3017: }
3018: }
3019: &appenv('request.ambiguous' => $thisfn);
3020: return '';
3021: }
3022:
3023: # ---------------------------------------------------------- Return random seed
3024:
3025: sub numval {
3026: my $txt=shift;
3027: $txt=~tr/A-J/0-9/;
3028: $txt=~tr/a-j/0-9/;
3029: $txt=~tr/K-T/0-9/;
3030: $txt=~tr/k-t/0-9/;
3031: $txt=~tr/U-Z/0-5/;
3032: $txt=~tr/u-z/0-5/;
3033: $txt=~s/\D//g;
3034: return int($txt);
3035: }
3036:
3037: sub rndseed {
3038: my ($symb,$courseid,$domain,$username)=@_;
3039: if (!$symb) {
3040: unless ($symb=&symbread()) { return time; }
3041: }
3042: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3043: if (!$domain) {$domain=$ENV{'user.domain'};}
3044: if (!$username) {$username=$ENV{'user.name'};}
3045: {
3046: use integer;
3047: my $symbchck=unpack("%32C*",$symb) << 27;
3048: my $symbseed=numval($symb) << 22;
3049: my $namechck=unpack("%32C*",$username) << 17;
3050: my $nameseed=numval($username) << 12;
3051: my $domainseed=unpack("%32C*",$domain) << 7;
3052: my $courseseed=unpack("%32C*",$courseid);
3053: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3054: #uncommenting these lines can break things!
3055: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3056: #&Apache::lonxml::debug("rndseed :$num:$symb");
3057: return $num;
3058: }
3059: }
3060:
3061: sub ireceipt {
3062: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3063: my $cuname=unpack("%32C*",$funame);
3064: my $cudom=unpack("%32C*",$fudom);
3065: my $cucourseid=unpack("%32C*",$fucourseid);
3066: my $cusymb=unpack("%32C*",$fusymb);
3067: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3068: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3069: ($cunique%$cuname+
3070: $cunique%$cudom+
3071: $cusymb%$cuname+
3072: $cusymb%$cudom+
3073: $cucourseid%$cuname+
3074: $cucourseid%$cudom);
3075: }
3076:
3077: sub receipt {
3078: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3079: return &ireceipt($name,$domain,$courseid,$symb);
3080: }
3081:
3082: # ------------------------------------------------------------ Serves up a file
3083: # returns either the contents of the file or a -1
3084: sub getfile {
3085: my $file=shift;
3086: if ($file=~/^\/*uploaded\//) { # user file
3087: my $ua=new LWP::UserAgent;
3088: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3089: my $response=$ua->request($request);
3090: if ($response->is_success()) {
3091: return $response->content;
3092: } else {
3093: return -1;
3094: }
3095: } else { # normal file from res space
3096: &repcopy($file);
3097: if (! -e $file ) { return -1; };
3098: my $fh=Apache::File->new($file);
3099: my $a='';
3100: while (<$fh>) { $a .=$_; }
3101: return $a;
3102: }
3103: }
3104:
3105: sub filelocation {
3106: my ($dir,$file) = @_;
3107: my $location;
3108: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3109: if ($file=~m:^/~:) { # is a contruction space reference
3110: $location = $file;
3111: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3112: } else {
3113: $file=~s/^$perlvar{'lonDocRoot'}//;
3114: $file=~s:^/*res::;
3115: if ( !( $file =~ m:^/:) ) {
3116: $location = $dir. '/'.$file;
3117: } else {
3118: $location = '/home/httpd/html/res'.$file;
3119: }
3120: }
3121: $location=~s://+:/:g; # remove duplicate /
3122: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3123: return $location;
3124: }
3125:
3126: sub hreflocation {
3127: my ($dir,$file)=@_;
3128: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3129: my $finalpath=filelocation($dir,$file);
3130: $finalpath=~s/^\/home\/httpd\/html//;
3131: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3132: return $finalpath;
3133: } else {
3134: return $file;
3135: }
3136: }
3137:
3138: # ------------------------------------------------------------- Declutters URLs
3139:
3140: sub declutter {
3141: my $thisfn=shift;
3142: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3143: $thisfn=~s/^\///;
3144: $thisfn=~s/^res\///;
3145: $thisfn=~s/\?.+$//;
3146: return $thisfn;
3147: }
3148:
3149: # ------------------------------------------------------------- Clutter up URLs
3150:
3151: sub clutter {
3152: my $thisfn='/'.&declutter(shift);
3153: unless ($thisfn=~/^\/(uploaded|adm)\//) { $thisfn='/res'.$thisfn; }
3154: return $thisfn;
3155: }
3156:
3157: # -------------------------------------------------------- Escape Special Chars
3158:
3159: sub escape {
3160: my $str=shift;
3161: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3162: return $str;
3163: }
3164:
3165: # ----------------------------------------------------- Un-Escape Special Chars
3166:
3167: sub unescape {
3168: my $str=shift;
3169: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3170: return $str;
3171: }
3172:
3173: # ================================================================ Main Program
3174:
3175: sub goodbye {
3176: &logthis("Starting Shut down");
3177: &flushcourselogs();
3178: &logthis("Shutting down");
3179: }
3180:
3181: BEGIN {
3182: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3183: unless ($readit) {
3184: {
3185: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3186:
3187: while (my $configline=<$config>) {
3188: if ($configline =~ /^[^\#]*PerlSetVar/) {
3189: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3190: chomp($varvalue);
3191: $perlvar{$varname}=$varvalue;
3192: }
3193: }
3194: }
3195: {
3196: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3197:
3198: while (my $configline=<$config>) {
3199: if ($configline =~ /^[^\#]*PerlSetVar/) {
3200: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3201: chomp($varvalue);
3202: $perlvar{$varname}=$varvalue;
3203: }
3204: }
3205: }
3206:
3207: # ------------------------------------------------------------- Read hosts file
3208: {
3209: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3210:
3211: while (my $configline=<$config>) {
3212: chomp($configline);
3213: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3214: if ($id && $domain && $role && $name && $ip) {
3215: $hostname{$id}=$name;
3216: $hostdom{$id}=$domain;
3217: $hostip{$id}=$ip;
3218: if ($domdescr) { $domaindescription{$domain}=$domdescr; }
3219: if ($role eq 'library') { $libserv{$id}=$name; }
3220: } else {
3221: if ($configline) {
3222: &logthis("Skipping hosts.tab line -$configline-");
3223: }
3224: }
3225: }
3226: }
3227:
3228: # ------------------------------------------------------ Read spare server file
3229: {
3230: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3231:
3232: while (my $configline=<$config>) {
3233: chomp($configline);
3234: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
3235: $spareid{$configline}=1;
3236: }
3237: }
3238: }
3239: # ------------------------------------------------------------ Read permissions
3240: {
3241: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3242:
3243: while (my $configline=<$config>) {
3244: chomp($configline);
3245: if ($configline) {
3246: my ($role,$perm)=split(/ /,$configline);
3247: if ($perm ne '') { $pr{$role}=$perm; }
3248: }
3249: }
3250: }
3251:
3252: # -------------------------------------------- Read plain texts for permissions
3253: {
3254: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3255:
3256: while (my $configline=<$config>) {
3257: chomp($configline);
3258: if ($configline) {
3259: my ($short,$plain)=split(/:/,$configline);
3260: if ($plain ne '') { $prp{$short}=$plain; }
3261: }
3262: }
3263: }
3264:
3265: # ---------------------------------------------------------- Read package table
3266: {
3267: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3268:
3269: while (my $configline=<$config>) {
3270: chomp($configline);
3271: my ($short,$plain)=split(/:/,$configline);
3272: my ($pack,$name)=split(/\&/,$short);
3273: if ($plain ne '') {
3274: $packagetab{$pack.'&'.$name.'&name'}=$name;
3275: $packagetab{$short}=$plain;
3276: }
3277: }
3278: }
3279:
3280: %metacache=();
3281:
3282: $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
3283: $dumpcount=0;
3284:
3285: &logtouch();
3286: &logthis('<font color=yellow>INFO: Read configuration</font>');
3287: $readit=1;
3288: }
3289: }
3290:
3291: 1;
3292: __END__
3293:
3294: =pod
3295:
3296: =head1 NAME
3297:
3298: Apache::lonnet - Subroutines to ask questions about things in the network.
3299:
3300: =head1 SYNOPSIS
3301:
3302: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3303:
3304: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3305:
3306: Common parameters:
3307:
3308: =over 4
3309:
3310: =item *
3311:
3312: $uname : an internal username (if $cname expecting a course Id specifically)
3313:
3314: =item *
3315:
3316: $udom : a domain (if $cdom expecting a course's domain specifically)
3317:
3318: =item *
3319:
3320: $symb : a resource instance identifier
3321:
3322: =item *
3323:
3324: $namespace : the name of a .db file that contains the data needed or
3325: being set.
3326:
3327: =back
3328:
3329: =head1 INTRODUCTION
3330:
3331: This module provides subroutines which interact with the
3332: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3333: - classes
3334: - users
3335: - resources
3336:
3337: For many of these objects you can also use this to store data about
3338: them or modify them in various ways.
3339:
3340: This is part of the LearningOnline Network with CAPA project
3341: described at http://www.lon-capa.org.
3342:
3343: =head1 RETURN MESSAGES
3344:
3345: =over 4
3346:
3347: =item *
3348:
3349: con_lost : unable to contact remote host
3350:
3351: =item *
3352:
3353: con_delayed : unable to contact remote host, message will be delivered
3354: when the connection is brought back up
3355:
3356: =item *
3357:
3358: con_failed : unable to contact remote host and unable to save message
3359: for later delivery
3360:
3361: =item *
3362:
3363: error: : an error a occured, a description of the error follows the :
3364:
3365: =item *
3366:
3367: no_such_host : unable to fund a host associated with the user/domain
3368: that was requested
3369:
3370: =back
3371:
3372: =head1 PUBLIC SUBROUTINES
3373:
3374: =head2 Session Environment Functions
3375:
3376: =over 4
3377:
3378: =item *
3379:
3380: appenv(%hash) : the value of %hash is written to the user envirnoment
3381: file, and will be restored for each access this user makes during this
3382: session, also modifies the %ENV for the current process
3383:
3384: =item *
3385:
3386: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3387:
3388: =back
3389:
3390: =head2 User Information
3391:
3392: =over 4
3393:
3394: =item *
3395:
3396: queryauthenticate($uname,$udom) : try to determine user's current
3397: authentication scheme
3398:
3399: =item *
3400:
3401: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3402: servers (first use the current one), $upass should be the users password
3403:
3404: =item *
3405:
3406: homeserver($uname,$udom) : find the server which has the user's
3407: directory and files (there must be only one), this caches the answer,
3408: and also caches if there is a borken connection.
3409:
3410: =item *
3411:
3412: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3413: unique resource in a domain, there must be only 1 ID per username, and
3414: only 1 username per ID in a specific domain) (returns hash:
3415: id=>name,id=>name)
3416:
3417: =item *
3418:
3419: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3420: name=>id,name=>id)
3421:
3422: =item *
3423:
3424: idput($udom,%ids) : store away a list of names and associated IDs
3425:
3426: =item *
3427:
3428: rolesinit($udom,$username,$authhost) : get user privileges
3429:
3430: =item *
3431:
3432: usection($udom,$uname,$cname) : finds the section of student in the
3433: course $cname, return section name/number or '' for "not in course"
3434: and '-1' for "no section"
3435:
3436: =item *
3437:
3438: userenvironment($udom,$uname,@what) : gets the values of the keys
3439: passed in @what from the requested user's environment, returns a hash
3440:
3441: =back
3442:
3443: =head2 User Roles
3444:
3445: =over 4
3446:
3447: =item *
3448:
3449: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
3450: actions
3451: F: full access
3452: U,I,K: authentication modes (cxx only)
3453: '': forbidden
3454: 1: user needs to choose course
3455: 2: browse allowed
3456:
3457: =item *
3458:
3459: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
3460: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
3461: and course level
3462:
3463: =item *
3464:
3465: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
3466: explanation of a user role term
3467:
3468: =back
3469:
3470: =head2 User Modification
3471:
3472: =over 4
3473:
3474: =item *
3475:
3476: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
3477: user for the level given by URL. Optional start and end dates (leave empty
3478: string or zero for "no date")
3479:
3480: =item *
3481:
3482: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
3483: change a users, password, possible return values are: ok,
3484: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
3485: refused
3486:
3487: =item *
3488:
3489: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
3490:
3491: =item *
3492:
3493: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
3494: modify user
3495:
3496: =item *
3497:
3498: modifystudent($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,$end,$start) : modify student
3499:
3500: =item *
3501:
3502: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
3503: custom role; give a custom role to a user for the level given by URL. Specify
3504: name and domain of role author, and role name
3505:
3506: =item *
3507:
3508: revokerole($udom,$uname,$url,$role) : revoke a role for url
3509:
3510: =item *
3511:
3512: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
3513:
3514: =back
3515:
3516: =head2 Course Infomation
3517:
3518: =over 4
3519:
3520: =item *
3521:
3522: coursedescription($courseid) : course description
3523:
3524: =item *
3525:
3526: courseresdata($coursenum,$coursedomain,@which) : request for current
3527: parameter setting for a specific course, @what should be a list of
3528: parameters to ask about. This routine caches answers for 5 minutes.
3529:
3530: =back
3531:
3532: =head2 Course Modification
3533:
3534: =over 4
3535:
3536: =item *
3537:
3538: writecoursepref($courseid,%prefs) : write preferences (environment
3539: database) for a course
3540:
3541: =item *
3542:
3543: createcourse($udom,$description,$url) : make/modify course
3544:
3545: =back
3546:
3547: =head2 Resource Subroutines
3548:
3549: =over 4
3550:
3551: =item *
3552:
3553: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
3554:
3555: =item *
3556:
3557: repcopy($filename) : subscribes to the requested file, and attempts to
3558: replicate from the owning library server, Might return
3559: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
3560: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
3561: resource. Expects the local filesystem pathname
3562: (/home/httpd/html/res/....)
3563:
3564: =back
3565:
3566: =head2 Resource Information
3567:
3568: =over 4
3569:
3570: =item *
3571:
3572: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
3573: a vairety of different possible values, $varname should be a request
3574: string, and the other parameters can be used to specify who and what
3575: one is asking about.
3576:
3577: Possible values for $varname are environment.lastname (or other item
3578: from the envirnment hash), user.name (or someother aspect about the
3579: user), resource.0.maxtries (or some other part and parameter of a
3580: resource)
3581:
3582: =item *
3583:
3584: directcondval($number) : get current value of a condition; reads from a state
3585: string
3586:
3587: =item *
3588:
3589: condval($condidx) : value of condition index based on state
3590:
3591: =item *
3592:
3593: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
3594: resource's metadata, $what should be either a specific key, or either
3595: 'keys' (to get a list of possible keys) or 'packages' to get a list of
3596: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
3597:
3598: this function automatically caches all requests
3599:
3600: =item *
3601:
3602: metadata_query($query,$custom,$customshow) : make a metadata query against the
3603: network of library servers; returns file handle of where SQL and regex results
3604: will be stored for query
3605:
3606: =item *
3607:
3608: symbread($filename) : return symbolic list entry (filename argument optional);
3609: returns the data handle
3610:
3611: =item *
3612:
3613: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
3614: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
3615: failure, user must be in a course, as it assumes the existance of the
3616: course initi hash, and uses $ENV('request.course.id'}
3617:
3618:
3619: =item *
3620:
3621: symbclean($symb) : removes versions numbers from a symb, returns the
3622: cleaned symb
3623:
3624: =item *
3625:
3626: is_on_map($uri) : checks if the $uri is somewhere on the current
3627: course map, user must be in a course for it to work.
3628:
3629: =item *
3630:
3631: numval($salt) : return random seed value (addend for rndseed)
3632:
3633: =item *
3634:
3635: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
3636: a random seed, all arguments are optional, if they aren't sent it uses the
3637: environment to derive them. Note: if symb isn't sent and it can't get one
3638: from &symbread it will use the current time as its return value
3639:
3640: =item *
3641:
3642: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
3643: unfakeable, receipt
3644:
3645: =item *
3646:
3647: receipt() : API to ireceipt working off of ENV values; given out to users
3648:
3649: =item *
3650:
3651: countacc($url) : count the number of accesses to a given URL
3652:
3653: =item *
3654:
3655: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
3656:
3657: =item *
3658:
3659: checkin($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 $tcrsid)
3660:
3661: =item *
3662:
3663: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
3664:
3665: =item *
3666:
3667: devalidate($symb) : devalidate temporary spreadsheet calculations,
3668: forcing spreadsheet to reevaluate the resource scores next time.
3669:
3670: =back
3671:
3672: =head2 Storing/Retreiving Data
3673:
3674: =over 4
3675:
3676: =item *
3677:
3678: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
3679: for this url; hashref needs to be given and should be a \%hashname; the
3680: remaining args aren't required and if they aren't passed or are '' they will
3681: be derived from the ENV
3682:
3683: =item *
3684:
3685: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
3686: uses critical subroutine
3687:
3688: =item *
3689:
3690: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
3691: all args are optional
3692:
3693: =item *
3694:
3695: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
3696: works very similar to store/cstore, but all data is stored in a
3697: temporary location and can be reset using tmpreset, $storehash should
3698: be a hash reference, returns nothing on success
3699:
3700: =item *
3701:
3702: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
3703: similar to restore, but all data is stored in a temporary location and
3704: can be reset using tmpreset. Returns a hash of values on success,
3705: error string otherwise.
3706:
3707: =item *
3708:
3709: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
3710: deltes all keys for $symb form the temporary storage hash.
3711:
3712: =item *
3713:
3714: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
3715: reference filled in from namesp ($udom and $uname are optional)
3716:
3717: =item *
3718:
3719: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
3720: namesp ($udom and $uname are optional)
3721:
3722: =item *
3723:
3724: dump($namespace,$udom,$uname,$regexp) :
3725: dumps the complete (or key matching regexp) namespace into a hash
3726: ($udom, $uname and $regexp are optional)
3727:
3728: =item *
3729:
3730: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
3731: ($udom and $uname are optional)
3732:
3733: =item *
3734:
3735: cput($namespace,$storehash,$udom,$uname) : critical put
3736: ($udom and $uname are optional)
3737:
3738: =item *
3739:
3740: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
3741: reference filled in from namesp (encrypts the return communication)
3742: ($udom and $uname are optional)
3743:
3744: =item *
3745:
3746: log($udom,$name,$home,$message) : write to permanent log for user; use
3747: critical subroutine
3748:
3749: =back
3750:
3751: =head2 Network Status Functions
3752:
3753: =over 4
3754:
3755: =item *
3756:
3757: dirlist($uri) : return directory list based on URI
3758:
3759: =item *
3760:
3761: spareserver() : find server with least workload from spare.tab
3762:
3763: =back
3764:
3765: =head2 Apache Request
3766:
3767: =over 4
3768:
3769: =item *
3770:
3771: ssi($url,%hash) : server side include, does a complete request cycle on url to
3772: localhost, posts hash
3773:
3774: =back
3775:
3776: =head2 Data to String to Data
3777:
3778: =over 4
3779:
3780: =item *
3781:
3782: hash2str(%hash) : convert a hash into a string complete with escaping and '='
3783: and '&' separators, supports elements that are arrayrefs and hashrefs
3784:
3785: =item *
3786:
3787: hashref2str($hashref) : convert a hashref into a string complete with
3788: escaping and '=' and '&' separators, supports elements that are
3789: arrayrefs and hashrefs
3790:
3791: =item *
3792:
3793: arrayref2str($arrayref) : convert an arrayref into a string complete
3794: with escaping and '&' separators, supports elements that are arrayrefs
3795: and hashrefs
3796:
3797: =item *
3798:
3799: str2hash($string) : convert string to hash using unescaping and
3800: splitting on '=' and '&', supports elements that are arrayrefs and
3801: hashrefs
3802:
3803: =item *
3804:
3805: str2array($string) : convert string to hash using unescaping and
3806: splitting on '&', supports elements that are arrayrefs and hashrefs
3807:
3808: =back
3809:
3810: =head2 Logging Routines
3811:
3812: =over 4
3813:
3814: These routines allow one to make log messages in the lonnet.log and
3815: lonnet.perm logfiles.
3816:
3817: =item *
3818:
3819: logtouch() : make sure the logfile, lonnet.log, exists
3820:
3821: =item *
3822:
3823: logthis() : append message to the normal lonnet.log file, it gets
3824: preiodically rolled over and deleted.
3825:
3826: =item *
3827:
3828: logperm() : append a permanent message to lonnet.perm.log, this log
3829: file never gets deleted by any automated portion of the system, only
3830: messages of critical importance should go in here.
3831:
3832: =back
3833:
3834: =head2 General File Helper Routines
3835:
3836: =over 4
3837:
3838: =item *
3839:
3840: getfile($file) : returns the entire contents of a file or -1; it
3841: properly subscribes to and replicates the file if neccessary.
3842:
3843: =item *
3844:
3845: filelocation($dir,$file) : returns file system location of a file
3846: based on URI; meant to be "fairly clean" absolute reference, $dir is a
3847: directory that relative $file lookups are to looked in ($dir of /a/dir
3848: and a file of ../bob will become /a/bob)
3849:
3850: =item *
3851:
3852: hreflocation($dir,$file) : returns file system location or a URL; same as
3853: filelocation except for hrefs
3854:
3855: =item *
3856:
3857: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
3858:
3859: =back
3860:
3861: =head2 HTTP Helper Routines
3862:
3863: =over 4
3864:
3865: =item *
3866:
3867: escape() : unpack non-word characters into CGI-compatible hex codes
3868:
3869: =item *
3870:
3871: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
3872:
3873: =back
3874:
3875: =head1 PRIVATE SUBROUTINES
3876:
3877: =head2 Underlying communication routines (Shouldn't call)
3878:
3879: =over 4
3880:
3881: =item *
3882:
3883: subreply() : tries to pass a message to lonc, returns con_lost if incapable
3884:
3885: =item *
3886:
3887: reply() : uses subreply to send a message to remote machine, logs all failures
3888:
3889: =item *
3890:
3891: critical() : passes a critical message to another server; if cannot
3892: get through then place message in connection buffer directory and
3893: returns con_delayed, if incapable of saving message, returns
3894: con_failed
3895:
3896: =item *
3897:
3898: reconlonc() : tries to reconnect lonc client processes.
3899:
3900: =back
3901:
3902: =head2 Resource Access Logging
3903:
3904: =over 4
3905:
3906: =item *
3907:
3908: flushcourselogs() : flush (save) buffer logs and access logs
3909:
3910: =item *
3911:
3912: courselog($what) : save message for course in hash
3913:
3914: =item *
3915:
3916: courseacclog($what) : save message for course using &courselog(). Perform
3917: special processing for specific resource types (problems, exams, quizzes, etc).
3918:
3919: =item *
3920:
3921: goodbye() : flush course logs and log shutting down; it is called in srm.conf
3922: as a PerlChildExitHandler
3923:
3924: =back
3925:
3926: =head2 Other
3927:
3928: =over 4
3929:
3930: =item *
3931:
3932: symblist($mapname,%newhash) : update symbolic storage links
3933:
3934: =back
3935:
3936: =cut
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