1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.344 2003/03/22 02:13:08 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: # 3/2 Gerd Kortemeyer
51: # 3/19,3/20 Gerd Kortemeyer
52: # 5/26,5/28 Gerd Kortemeyer
53: # 5/30 H. K. Ng
54: # 6/1 Gerd Kortemeyer
55: # July Guy Albertelli
56: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
57: # 10/2 Gerd Kortemeyer
58: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
59: # 12/5 Matthew Hall
60: # 12/5 Guy Albertelli
61: # 12/6,12/7,12/12 Gerd Kortemeyer
62: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
63: # YEAR=2002
64: # 1/4,2/4,2/7 Gerd Kortemeyer
65: #
66: ###
67:
68: package Apache::lonnet;
69:
70: use strict;
71: use Apache::File;
72: use LWP::UserAgent();
73: use HTTP::Headers;
74: use vars
75: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
76: %libserv %pr %prp %metacache %packagetab %titlecache
77: %courselogs %accesshash $processmarker $dumpcount
78: %coursedombuf %coursehombuf %courseresdatacache
79: %domaindescription %domain_auth_def %domain_auth_arg_def $tmpdir);
80: use IO::Socket;
81: use GDBM_File;
82: use Apache::Constants qw(:common :http);
83: use HTML::LCParser;
84: use Fcntl qw(:flock);
85: use Apache::loncoursedata;
86:
87: my $readit;
88:
89: # --------------------------------------------------------------------- Logging
90:
91: sub logtouch {
92: my $execdir=$perlvar{'lonDaemons'};
93: unless (-e "$execdir/logs/lonnet.log") {
94: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
95: close $fh;
96: }
97: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
98: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
99: }
100:
101: sub logthis {
102: my $message=shift;
103: my $execdir=$perlvar{'lonDaemons'};
104: my $now=time;
105: my $local=localtime($now);
106: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
107: print $fh "$local ($$): $message\n";
108: return 1;
109: }
110:
111: sub logperm {
112: my $message=shift;
113: my $execdir=$perlvar{'lonDaemons'};
114: my $now=time;
115: my $local=localtime($now);
116: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
117: print $fh "$now:$message:$local\n";
118: return 1;
119: }
120:
121: # -------------------------------------------------- Non-critical communication
122: sub subreply {
123: my ($cmd,$server)=@_;
124: my $peerfile="$perlvar{'lonSockDir'}/$server";
125: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
126: Type => SOCK_STREAM,
127: Timeout => 10)
128: or return "con_lost";
129: print $client "$cmd\n";
130: my $answer=<$client>;
131: if (!$answer) { $answer="con_lost"; }
132: chomp($answer);
133: return $answer;
134: }
135:
136: sub reply {
137: my ($cmd,$server)=@_;
138: unless (defined($hostname{$server})) { return 'no_such_host'; }
139: my $answer=subreply($cmd,$server);
140: if ($answer eq 'con_lost') {
141: #sleep 5;
142: #$answer=subreply($cmd,$server);
143: #if ($answer eq 'con_lost') {
144: # &logthis("Second attempt con_lost on $server");
145: # my $peerfile="$perlvar{'lonSockDir'}/$server";
146: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
147: # Type => SOCK_STREAM,
148: # Timeout => 10)
149: # or return "con_lost";
150: # &logthis("Killing socket");
151: # print $client "close_connection_exit\n";
152: #sleep 5;
153: # $answer=subreply($cmd,$server);
154: #}
155: }
156: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
157: &logthis("<font color=blue>WARNING:".
158: " $cmd to $server returned $answer</font>");
159: }
160: return $answer;
161: }
162:
163: # ----------------------------------------------------------- Send USR1 to lonc
164:
165: sub reconlonc {
166: my $peerfile=shift;
167: &logthis("Trying to reconnect for $peerfile");
168: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
169: if (my $fh=Apache::File->new("$loncfile")) {
170: my $loncpid=<$fh>;
171: chomp($loncpid);
172: if (kill 0 => $loncpid) {
173: &logthis("lonc at pid $loncpid responding, sending USR1");
174: kill USR1 => $loncpid;
175: sleep 1;
176: if (-e "$peerfile") { return; }
177: &logthis("$peerfile still not there, give it another try");
178: sleep 5;
179: if (-e "$peerfile") { return; }
180: &logthis(
181: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
182: } else {
183: &logthis(
184: "<font color=blue>WARNING:".
185: " lonc at pid $loncpid not responding, giving up</font>");
186: }
187: } else {
188: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
189: }
190: }
191:
192: # ------------------------------------------------------ Critical communication
193:
194: sub critical {
195: my ($cmd,$server)=@_;
196: unless ($hostname{$server}) {
197: &logthis("<font color=blue>WARNING:".
198: " Critical message to unknown server ($server)</font>");
199: return 'no_such_host';
200: }
201: my $answer=reply($cmd,$server);
202: if ($answer eq 'con_lost') {
203: my $pingreply=reply('ping',$server);
204: &reconlonc("$perlvar{'lonSockDir'}/$server");
205: my $pongreply=reply('pong',$server);
206: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
207: $answer=reply($cmd,$server);
208: if ($answer eq 'con_lost') {
209: my $now=time;
210: my $middlename=$cmd;
211: $middlename=substr($middlename,0,16);
212: $middlename=~s/\W//g;
213: my $dfilename=
214: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
215: $dumpcount++;
216: {
217: my $dfh;
218: if ($dfh=Apache::File->new(">$dfilename")) {
219: print $dfh "$cmd\n";
220: }
221: }
222: sleep 2;
223: my $wcmd='';
224: {
225: my $dfh;
226: if ($dfh=Apache::File->new("$dfilename")) {
227: $wcmd=<$dfh>;
228: }
229: }
230: chomp($wcmd);
231: if ($wcmd eq $cmd) {
232: &logthis("<font color=blue>WARNING: ".
233: "Connection buffer $dfilename: $cmd</font>");
234: &logperm("D:$server:$cmd");
235: return 'con_delayed';
236: } else {
237: &logthis("<font color=red>CRITICAL:"
238: ." Critical connection failed: $server $cmd</font>");
239: &logperm("F:$server:$cmd");
240: return 'con_failed';
241: }
242: }
243: }
244: return $answer;
245: }
246:
247: # ---------------------------------------------------------- Append Environment
248:
249: sub appenv {
250: my %newenv=@_;
251: foreach (keys %newenv) {
252: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
253: &logthis("<font color=blue>WARNING: ".
254: "Attempt to modify environment ".$_." to ".$newenv{$_}
255: .'</font>');
256: delete($newenv{$_});
257: } else {
258: $ENV{$_}=$newenv{$_};
259: }
260: }
261:
262: my $lockfh;
263: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
264: return 'error: '.$!;
265: }
266: unless (flock($lockfh,LOCK_EX)) {
267: &logthis("<font color=blue>WARNING: ".
268: 'Could not obtain exclusive lock in appenv: '.$!);
269: $lockfh->close();
270: return 'error: '.$!;
271: }
272:
273: my @oldenv;
274: {
275: my $fh;
276: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
277: return 'error: '.$!;
278: }
279: @oldenv=<$fh>;
280: $fh->close();
281: }
282: for (my $i=0; $i<=$#oldenv; $i++) {
283: chomp($oldenv[$i]);
284: if ($oldenv[$i] ne '') {
285: my ($name,$value)=split(/=/,$oldenv[$i]);
286: unless (defined($newenv{$name})) {
287: $newenv{$name}=$value;
288: }
289: }
290: }
291: {
292: my $fh;
293: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
294: return 'error';
295: }
296: my $newname;
297: foreach $newname (keys %newenv) {
298: print $fh "$newname=$newenv{$newname}\n";
299: }
300: $fh->close();
301: }
302:
303: $lockfh->close();
304: return 'ok';
305: }
306: # ----------------------------------------------------- Delete from Environment
307:
308: sub delenv {
309: my $delthis=shift;
310: my %newenv=();
311: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
312: &logthis("<font color=blue>WARNING: ".
313: "Attempt to delete from environment ".$delthis);
314: return 'error';
315: }
316: my @oldenv;
317: {
318: my $fh;
319: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
320: return 'error';
321: }
322: unless (flock($fh,LOCK_SH)) {
323: &logthis("<font color=blue>WARNING: ".
324: 'Could not obtain shared lock in delenv: '.$!);
325: $fh->close();
326: return 'error: '.$!;
327: }
328: @oldenv=<$fh>;
329: $fh->close();
330: }
331: {
332: my $fh;
333: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
334: return 'error';
335: }
336: unless (flock($fh,LOCK_EX)) {
337: &logthis("<font color=blue>WARNING: ".
338: 'Could not obtain exclusive lock in delenv: '.$!);
339: $fh->close();
340: return 'error: '.$!;
341: }
342: foreach (@oldenv) {
343: unless ($_=~/^$delthis/) { print $fh $_; }
344: }
345: $fh->close();
346: }
347: return 'ok';
348: }
349:
350: # ------------------------------------------ Fight off request when overloaded
351:
352: sub overloaderror {
353: my ($r,$checkserver)=@_;
354: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
355: my $loadavg;
356: if ($checkserver eq $perlvar{'lonHostID'}) {
357: my $loadfile=Apache::File->new('/proc/loadavg');
358: $loadavg=<$loadfile>;
359: $loadavg =~ s/\s.*//g;
360: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
361: } else {
362: $loadavg=&reply('load',$checkserver);
363: }
364: my $overload=$loadavg-100;
365: if ($overload>0) {
366: $r->err_headers_out->{'Retry-After'}=$overload;
367: $r->log_error('Overload of '.$overload.' on '.$checkserver);
368: return 413;
369: }
370: return '';
371: }
372:
373: # ------------------------------ Find server with least workload from spare.tab
374:
375: sub spareserver {
376: my $loadpercent = shift;
377: my $tryserver;
378: my $spareserver='';
379: my $lowestserver=$loadpercent;
380: foreach $tryserver (keys %spareid) {
381: my $answer=reply('load',$tryserver);
382: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
383: $spareserver="http://$hostname{$tryserver}";
384: $lowestserver=$answer;
385: }
386: }
387: return $spareserver;
388: }
389:
390: # --------------------------------------------- Try to change a user's password
391:
392: sub changepass {
393: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
394: $currentpass = &escape($currentpass);
395: $newpass = &escape($newpass);
396: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
397: $server);
398: if (! $answer) {
399: &logthis("No reply on password change request to $server ".
400: "by $uname in domain $udom.");
401: } elsif ($answer =~ "^ok") {
402: &logthis("$uname in $udom successfully changed their password ".
403: "on $server.");
404: } elsif ($answer =~ "^pwchange_failure") {
405: &logthis("$uname in $udom was unable to change their password ".
406: "on $server. The action was blocked by either lcpasswd ".
407: "or pwchange");
408: } elsif ($answer =~ "^non_authorized") {
409: &logthis("$uname in $udom did not get their password correct when ".
410: "attempting to change it on $server.");
411: } elsif ($answer =~ "^auth_mode_error") {
412: &logthis("$uname in $udom attempted to change their password despite ".
413: "not being locally or internally authenticated on $server.");
414: } elsif ($answer =~ "^unknown_user") {
415: &logthis("$uname in $udom attempted to change their password ".
416: "on $server but were unable to because $server is not ".
417: "their home server.");
418: } elsif ($answer =~ "^refused") {
419: &logthis("$server refused to change $uname in $udom password because ".
420: "it was sent an unencrypted request to change the password.");
421: }
422: return $answer;
423: }
424:
425: # ----------------------- Try to determine user's current authentication scheme
426:
427: sub queryauthenticate {
428: my ($uname,$udom)=@_;
429: if (($perlvar{'lonRole'} eq 'library') &&
430: ($udom eq $perlvar{'lonDefDomain'})) {
431: my $answer=reply("encrypt:currentauth:$udom:$uname",
432: $perlvar{'lonHostID'});
433: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
434: if (length($answer)) {
435: return $answer;
436: }
437: else {
438: &logthis("User $uname at $udom lacks an authentication mechanism");
439: return 'no_host';
440: }
441: }
442: }
443:
444: my $tryserver;
445: foreach $tryserver (keys %libserv) {
446: if ($hostdom{$tryserver} eq $udom) {
447: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
448: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
449: if (length($answer)) {
450: return $answer;
451: }
452: else {
453: &logthis("User $uname at $udom lacks an authentication mechanism");
454: return 'no_host';
455: }
456: }
457: }
458: }
459: &logthis("User $uname at $udom lacks an authentication mechanism");
460: return 'no_host';
461: }
462:
463: # --------- Try to authenticate user from domain's lib servers (first this one)
464:
465: sub authenticate {
466: my ($uname,$upass,$udom)=@_;
467: $upass=escape($upass);
468: $uname=~s/\W//g;
469: if (($perlvar{'lonRole'} eq 'library') &&
470: ($udom eq $perlvar{'lonDefDomain'})) {
471: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
472: if ($answer =~ /authorized/) {
473: if ($answer eq 'authorized') {
474: &logthis("User $uname at $udom authorized by local server");
475: return $perlvar{'lonHostID'};
476: }
477: if ($answer eq 'non_authorized') {
478: &logthis("User $uname at $udom rejected by local server");
479: return 'no_host';
480: }
481: }
482: }
483:
484: my $tryserver;
485: foreach $tryserver (keys %libserv) {
486: if ($hostdom{$tryserver} eq $udom) {
487: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
488: if ($answer =~ /authorized/) {
489: if ($answer eq 'authorized') {
490: &logthis("User $uname at $udom authorized by $tryserver");
491: return $tryserver;
492: }
493: if ($answer eq 'non_authorized') {
494: &logthis("User $uname at $udom rejected by $tryserver");
495: return 'no_host';
496: }
497: }
498: }
499: }
500: &logthis("User $uname at $udom could not be authenticated");
501: return 'no_host';
502: }
503:
504: # ---------------------- Find the homebase for a user from domain's lib servers
505:
506: sub homeserver {
507: my ($uname,$udom,$ignoreBadCache)=@_;
508: my $index="$uname:$udom";
509: if ($homecache{$index}) {
510: return "$homecache{$index}";
511: }
512: my $tryserver;
513: foreach $tryserver (keys %libserv) {
514: next if ($ignoreBadCache ne 'true' &&
515: exists($badServerCache{$tryserver}));
516: if ($hostdom{$tryserver} eq $udom) {
517: my $answer=reply("home:$udom:$uname",$tryserver);
518: if ($answer eq 'found') {
519: $homecache{$index}=$tryserver;
520: return $tryserver;
521: } elsif ($answer eq 'no_host') {
522: $badServerCache{$tryserver}=1;
523: }
524: }
525: }
526: return 'no_host';
527: }
528:
529: # ------------------------------------- Find the usernames behind a list of IDs
530:
531: sub idget {
532: my ($udom,@ids)=@_;
533: my %returnhash=();
534:
535: my $tryserver;
536: foreach $tryserver (keys %libserv) {
537: if ($hostdom{$tryserver} eq $udom) {
538: my $idlist=join('&',@ids);
539: $idlist=~tr/A-Z/a-z/;
540: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
541: my @answer=();
542: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
543: @answer=split(/\&/,$reply);
544: } ;
545: my $i;
546: for ($i=0;$i<=$#ids;$i++) {
547: if ($answer[$i]) {
548: $returnhash{$ids[$i]}=$answer[$i];
549: }
550: }
551: }
552: }
553: return %returnhash;
554: }
555:
556: # ------------------------------------- Find the IDs behind a list of usernames
557:
558: sub idrget {
559: my ($udom,@unames)=@_;
560: my %returnhash=();
561: foreach (@unames) {
562: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
563: }
564: return %returnhash;
565: }
566:
567: # ------------------------------- Store away a list of names and associated IDs
568:
569: sub idput {
570: my ($udom,%ids)=@_;
571: my %servers=();
572: foreach (keys %ids) {
573: my $uhom=&homeserver($_,$udom);
574: if ($uhom ne 'no_host') {
575: my $id=&escape($ids{$_});
576: $id=~tr/A-Z/a-z/;
577: my $unam=&escape($_);
578: if ($servers{$uhom}) {
579: $servers{$uhom}.='&'.$id.'='.$unam;
580: } else {
581: $servers{$uhom}=$id.'='.$unam;
582: }
583: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
584: }
585: }
586: foreach (keys %servers) {
587: &critical('idput:'.$udom.':'.$servers{$_},$_);
588: }
589: }
590:
591: # --------------------------------------------------- Assign a key to a student
592:
593: sub assign_access_key {
594: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
595: $cdom=
596: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
597: $cnum=
598: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
599: $udom=$ENV{'user.name'} unless (defined($udom));
600: $uname=$ENV{'user.domain'} unless (defined($uname));
601: }
602:
603: # ------------------------------------------------------ Generate a set of keys
604:
605: sub generate_access_keys {
606: my ($number,$cdom,$cnum)=@_;
607: $cdom=
608: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
609: $cnum=
610: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
611: unless (($cdom) && ($cnum)) { return 0; }
612: if ($number>10000) { return 0; }
613: sleep(2); # make sure don't get same seed twice
614: srand(time()^($$+($$<<15))); # from "Programming Perl"
615: my $total=0;
616: for (my $i=1;$i<=$number;$i++) {
617: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
618: sprintf("%lx",int(100000*rand)).'-'.
619: sprintf("%lx",int(100000*rand));
620: $newkey=~s/1/g/g; # folks mix up 1 and l
621: $newkey=~s/0/h/g; # and also 0 and O
622: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
623: if ($existing{$newkey}) {
624: $i--;
625: } else {
626: if (&put('accesskeys',{ $newkey => time() },$cdom,$cnum) eq 'ok') {
627: $total++;
628: }
629: }
630: }
631: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
632: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
633: return $total;
634: }
635:
636: # ------------------------------------------------------- Validate an accesskey
637:
638: sub validate_access_key {
639: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
640: $cdom=
641: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
642: $cnum=
643: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
644: $udom=$ENV{'user.name'} unless (defined($udom));
645: $uname=$ENV{'user.domain'} unless (defined($uname));
646: }
647:
648: # ------------------------------------- Find the section of student in a course
649:
650: sub getsection {
651: my ($udom,$unam,$courseid)=@_;
652: $courseid=~s/\_/\//g;
653: $courseid=~s/^(\w)/\/$1/;
654: my %Pending;
655: my %Expired;
656: #
657: # Each role can either have not started yet (pending), be active,
658: # or have expired.
659: #
660: # If there is an active role, we are done.
661: #
662: # If there is more than one role which has not started yet,
663: # choose the one which will start sooner
664: # If there is one role which has not started yet, return it.
665: #
666: # If there is more than one expired role, choose the one which ended last.
667: # If there is a role which has expired, return it.
668: #
669: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
670: &homeserver($unam,$udom)))) {
671: my ($key,$value)=split(/\=/,$_);
672: $key=&unescape($key);
673: next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
674: my $section=$1;
675: if ($key eq $courseid.'_st') { $section=''; }
676: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
677: my $now=time;
678: if (defined($end) && ($now > $end)) {
679: $Expired{$end}=$section;
680: next;
681: }
682: if (defined($start) && ($now < $start)) {
683: $Pending{$start}=$section;
684: next;
685: }
686: return $section;
687: }
688: #
689: # Presumedly there will be few matching roles from the above
690: # loop and the sorting time will be negligible.
691: if (scalar(keys(%Pending))) {
692: my ($time) = sort {$a <=> $b} keys(%Pending);
693: return $Pending{$time};
694: }
695: if (scalar(keys(%Expired))) {
696: my @sorted = sort {$a <=> $b} keys(%Expired);
697: my $time = pop(@sorted);
698: return $Expired{$time};
699: }
700: return '-1';
701: }
702:
703: sub usection {
704: my ($udom,$unam,$courseid)=@_;
705: $courseid=~s/\_/\//g;
706: $courseid=~s/^(\w)/\/$1/;
707: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
708: &homeserver($unam,$udom)))) {
709: my ($key,$value)=split(/\=/,$_);
710: $key=&unescape($key);
711: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
712: my $section=$1;
713: if ($key eq $courseid.'_st') { $section=''; }
714: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
715: my $now=time;
716: my $notactive=0;
717: if ($start) {
718: if ($now<$start) { $notactive=1; }
719: }
720: if ($end) {
721: if ($now>$end) { $notactive=1; }
722: }
723: unless ($notactive) { return $section; }
724: }
725: }
726: return '-1';
727: }
728:
729: # ------------------------------------- Read an entry from a user's environment
730:
731: sub userenvironment {
732: my ($udom,$unam,@what)=@_;
733: my %returnhash=();
734: my @answer=split(/\&/,
735: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
736: &homeserver($unam,$udom)));
737: my $i;
738: for ($i=0;$i<=$#what;$i++) {
739: $returnhash{$what[$i]}=&unescape($answer[$i]);
740: }
741: return %returnhash;
742: }
743:
744: # -------------------------------------------------------------------- New chat
745:
746: sub chatsend {
747: my ($newentry,$anon)=@_;
748: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
749: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
750: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
751: &reply('chatsend:'.$cdom.':'.$cnum.':'.
752: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
753: &escape($newentry)),$chome);
754: }
755:
756: # ------------------------------------------ Find current version of a resource
757:
758: sub getversion {
759: my $fname=&clutter(shift);
760: unless ($fname=~/^\/res\//) { return -1; }
761: return ¤tversion(&filelocation('',$fname));
762: }
763:
764: sub currentversion {
765: my $fname=shift;
766: my $author=$fname;
767: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
768: my ($udom,$uname)=split(/\//,$author);
769: my $home=homeserver($uname,$udom);
770: if ($home eq 'no_host') {
771: return -1;
772: }
773: my $answer=reply("currentversion:$fname",$home);
774: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
775: return -1;
776: }
777: return $answer;
778: }
779:
780: # ----------------------------- Subscribe to a resource, return URL if possible
781:
782: sub subscribe {
783: my $fname=shift;
784: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
785: my $author=$fname;
786: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
787: my ($udom,$uname)=split(/\//,$author);
788: my $home=homeserver($uname,$udom);
789: if ($home eq 'no_host') {
790: return 'not_found';
791: }
792: my $answer=reply("sub:$fname",$home);
793: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
794: $answer.=' by '.$home;
795: }
796: return $answer;
797: }
798:
799: # -------------------------------------------------------------- Replicate file
800:
801: sub repcopy {
802: my $filename=shift;
803: $filename=~s/\/+/\//g;
804: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
805: my $transname="$filename.in.transfer";
806: if ((-e $filename) || (-e $transname)) { return OK; }
807: my $remoteurl=subscribe($filename);
808: if ($remoteurl =~ /^con_lost by/) {
809: &logthis("Subscribe returned $remoteurl: $filename");
810: return HTTP_SERVICE_UNAVAILABLE;
811: } elsif ($remoteurl eq 'not_found') {
812: &logthis("Subscribe returned not_found: $filename");
813: return HTTP_NOT_FOUND;
814: } elsif ($remoteurl =~ /^rejected by/) {
815: &logthis("Subscribe returned $remoteurl: $filename");
816: return FORBIDDEN;
817: } elsif ($remoteurl eq 'directory') {
818: return OK;
819: } else {
820: my $author=$filename;
821: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
822: my ($udom,$uname)=split(/\//,$author);
823: my $home=homeserver($uname,$udom);
824: unless ($home eq $perlvar{'lonHostID'}) {
825: my @parts=split(/\//,$filename);
826: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
827: if ($path ne "$perlvar{'lonDocRoot'}/res") {
828: &logthis("Malconfiguration for replication: $filename");
829: return HTTP_BAD_REQUEST;
830: }
831: my $count;
832: for ($count=5;$count<$#parts;$count++) {
833: $path.="/$parts[$count]";
834: if ((-e $path)!=1) {
835: mkdir($path,0777);
836: }
837: }
838: my $ua=new LWP::UserAgent;
839: my $request=new HTTP::Request('GET',"$remoteurl");
840: my $response=$ua->request($request,$transname);
841: if ($response->is_error()) {
842: unlink($transname);
843: my $message=$response->status_line;
844: &logthis("<font color=blue>WARNING:"
845: ." LWP get: $message: $filename</font>");
846: return HTTP_SERVICE_UNAVAILABLE;
847: } else {
848: if ($remoteurl!~/\.meta$/) {
849: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
850: my $mresponse=$ua->request($mrequest,$filename.'.meta');
851: if ($mresponse->is_error()) {
852: unlink($filename.'.meta');
853: &logthis(
854: "<font color=yellow>INFO: No metadata: $filename</font>");
855: }
856: }
857: rename($transname,$filename);
858: return OK;
859: }
860: }
861: }
862: }
863:
864: # ------------------------------------------------ Get server side include body
865: sub ssi_body {
866: my $filelink=shift;
867: my $output=($filelink=~/^http\:/?&externalssi($filelink):
868: &ssi($filelink));
869: $output=~s/^.*\<body[^\>]*\>//si;
870: $output=~s/\<\/body\s*\>.*$//si;
871: $output=~
872: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
873: return $output;
874: }
875:
876: # --------------------------------------------------------- Server Side Include
877:
878: sub ssi {
879:
880: my ($fn,%form)=@_;
881:
882: my $ua=new LWP::UserAgent;
883:
884: my $request;
885:
886: if (%form) {
887: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
888: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
889: } else {
890: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
891: }
892:
893: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
894: my $response=$ua->request($request);
895:
896: return $response->content;
897: }
898:
899: sub externalssi {
900: my ($url)=@_;
901: my $ua=new LWP::UserAgent;
902: my $request=new HTTP::Request('GET',$url);
903: my $response=$ua->request($request);
904: return $response->content;
905: }
906:
907: # ------- Add a token to a remote URI's query string to vouch for access rights
908:
909: sub tokenwrapper {
910: my $uri=shift;
911: $uri=~s/^http\:\/\/([^\/]+)//;
912: $uri=~s/^\///;
913: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
914: my $token=$1;
915: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
916: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
917: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
918: (($uri=~/\?/)?'&':'?').'token='.$token.
919: '&tokenissued='.$perlvar{'lonHostID'};
920: } else {
921: return '/adm/notfound.html';
922: }
923: }
924:
925: # --------------- Take an uploaded file and put it into the userfiles directory
926: # input: name of form element, coursedoc=1 means this is for the course
927: # output: url of file in userspace
928:
929: sub userfileupload {
930: my ($formname,$coursedoc)=@_;
931: my $fname=$ENV{'form.'.$formname.'.filename'};
932: # Replace Windows backslashes by forward slashes
933: $fname=~s/\\/\//g;
934: # Get rid of everything but the actual filename
935: $fname=~s/^.*\/([^\/]+)$/$1/;
936: # Replace spaces by underscores
937: $fname=~s/\s+/\_/g;
938: # Replace all other weird characters by nothing
939: $fname=~s/[^\w\.\-]//g;
940: # See if there is anything left
941: unless ($fname) { return 'error: no uploaded file'; }
942: chop($ENV{'form.'.$formname});
943: # Create the directory if not present
944: my $docuname='';
945: my $docudom='';
946: my $docuhome='';
947: if ($coursedoc) {
948: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
949: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
950: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
951: } else {
952: $docuname=$ENV{'user.name'};
953: $docudom=$ENV{'user.domain'};
954: $docuhome=$ENV{'user.home'};
955: }
956: return
957: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
958: }
959:
960: sub finishuserfileupload {
961: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
962: my $path=$docudom.'/'.$docuname.'/';
963: my $filepath=$perlvar{'lonDocRoot'};
964: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
965: my $count;
966: for ($count=4;$count<=$#parts;$count++) {
967: $filepath.="/$parts[$count]";
968: if ((-e $filepath)!=1) {
969: mkdir($filepath,0777);
970: }
971: }
972: # Save the file
973: {
974: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
975: print $fh $ENV{'form.'.$formname};
976: }
977: # Notify homeserver to grep it
978: #
979:
980: my $fetchresult=
981: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
982: if ($fetchresult eq 'ok') {
983: #
984: # Return the URL to it
985: return '/uploaded/'.$path.$fname;
986: } else {
987: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
988: ' to host '.$docuhome.': '.$fetchresult);
989: return '/adm/notfound.html';
990: }
991: }
992:
993: # ------------------------------------------------------------------------- Log
994:
995: sub log {
996: my ($dom,$nam,$hom,$what)=@_;
997: return critical("log:$dom:$nam:$what",$hom);
998: }
999:
1000: # ------------------------------------------------------------------ Course Log
1001:
1002: sub flushcourselogs {
1003: &logthis('Flushing course log buffers');
1004: foreach (keys %courselogs) {
1005: my $crsid=$_;
1006: if (&reply('log:'.$coursedombuf{$crsid}.':'.
1007: &escape($courselogs{$crsid}),
1008: $coursehombuf{$crsid}) eq 'ok') {
1009: delete $courselogs{$crsid};
1010: } else {
1011: &logthis('Failed to flush log buffer for '.$crsid);
1012: if (length($courselogs{$crsid})>40000) {
1013: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1014: " exceeded maximum size, deleting.</font>");
1015: delete $courselogs{$crsid};
1016: }
1017: }
1018: }
1019: &logthis('Flushing access logs');
1020: foreach (keys %accesshash) {
1021: my $entry=$_;
1022: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
1023: my %temphash=($entry => $accesshash{$entry});
1024: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
1025: delete $accesshash{$entry};
1026: }
1027: }
1028: $dumpcount++;
1029: }
1030:
1031: sub courselog {
1032: my $what=shift;
1033: $what=time.':'.$what;
1034: unless ($ENV{'request.course.id'}) { return ''; }
1035: $coursedombuf{$ENV{'request.course.id'}}=
1036: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1037: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1038: $coursehombuf{$ENV{'request.course.id'}}=
1039: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1040: if (defined $courselogs{$ENV{'request.course.id'}}) {
1041: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1042: } else {
1043: $courselogs{$ENV{'request.course.id'}}.=$what;
1044: }
1045: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1046: &flushcourselogs();
1047: }
1048: }
1049:
1050: sub courseacclog {
1051: my $fnsymb=shift;
1052: unless ($ENV{'request.course.id'}) { return ''; }
1053: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1054: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
1055: $what.=':POST';
1056: foreach (keys %ENV) {
1057: if ($_=~/^form\.(.*)/) {
1058: $what.=':'.$1.'='.$ENV{$_};
1059: }
1060: }
1061: }
1062: &courselog($what);
1063: }
1064:
1065: sub countacc {
1066: my $url=&declutter(shift);
1067: unless ($ENV{'request.course.id'}) { return ''; }
1068: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1069: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1070: if (defined($accesshash{$key})) {
1071: $accesshash{$key}++;
1072: } else {
1073: $accesshash{$key}=1;
1074: }
1075: }
1076:
1077: # ----------------------------------------------------------- Check out an item
1078:
1079: sub checkout {
1080: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1081: my $now=time;
1082: my $lonhost=$perlvar{'lonHostID'};
1083: my $infostr=&escape(
1084: 'CHECKOUTTOKEN&'.
1085: $tuname.'&'.
1086: $tudom.'&'.
1087: $tcrsid.'&'.
1088: $symb.'&'.
1089: $now.'&'.$ENV{'REMOTE_ADDR'});
1090: my $token=&reply('tmpput:'.$infostr,$lonhost);
1091: if ($token=~/^error\:/) {
1092: &logthis("<font color=blue>WARNING: ".
1093: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1094: "</font>");
1095: return '';
1096: }
1097:
1098: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1099: $token=~tr/a-z/A-Z/;
1100:
1101: my %infohash=('resource.0.outtoken' => $token,
1102: 'resource.0.checkouttime' => $now,
1103: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1104:
1105: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1106: return '';
1107: } else {
1108: &logthis("<font color=blue>WARNING: ".
1109: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1110: "</font>");
1111: }
1112:
1113: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1114: &escape('Checkout '.$infostr.' - '.
1115: $token)) ne 'ok') {
1116: return '';
1117: } else {
1118: &logthis("<font color=blue>WARNING: ".
1119: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1120: "</font>");
1121: }
1122: return $token;
1123: }
1124:
1125: # ------------------------------------------------------------ Check in an item
1126:
1127: sub checkin {
1128: my $token=shift;
1129: my $now=time;
1130: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1131: $lonhost=~tr/A-Z/a-z/;
1132: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1133: $dtoken=~s/\W/\_/g;
1134: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1135: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1136:
1137: unless (($tuname) && ($tudom)) {
1138: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1139: return '';
1140: }
1141:
1142: unless (&allowed('mgr',$tcrsid)) {
1143: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1144: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1145: return '';
1146: }
1147:
1148: my %infohash=('resource.0.intoken' => $token,
1149: 'resource.0.checkintime' => $now,
1150: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1151:
1152: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1153: return '';
1154: }
1155:
1156: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1157: &escape('Checkin - '.$token)) ne 'ok') {
1158: return '';
1159: }
1160:
1161: return ($symb,$tuname,$tudom,$tcrsid);
1162: }
1163:
1164: # --------------------------------------------- Set Expire Date for Spreadsheet
1165:
1166: sub expirespread {
1167: my ($uname,$udom,$stype,$usymb)=@_;
1168: my $cid=$ENV{'request.course.id'};
1169: if ($cid) {
1170: my $now=time;
1171: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1172: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1173: $ENV{'course.'.$cid.'.num'}.
1174: ':nohist_expirationdates:'.
1175: &escape($key).'='.$now,
1176: $ENV{'course.'.$cid.'.home'})
1177: }
1178: return 'ok';
1179: }
1180:
1181: # ----------------------------------------------------- Devalidate Spreadsheets
1182:
1183: sub devalidate {
1184: my ($symb,$uname,$udom)=@_;
1185: my $cid=$ENV{'request.course.id'};
1186: if ($cid) {
1187: # delete the stored spreadsheets for
1188: # - the student level sheet of this user in course's homespace
1189: # - the assessment level sheet for this resource
1190: # for this user in user's homespace
1191: my $key=$uname.':'.$udom.':';
1192: my $status=
1193: &del('nohist_calculatedsheets',
1194: [$key.'studentcalc'],
1195: $ENV{'course.'.$cid.'.domain'},
1196: $ENV{'course.'.$cid.'.num'})
1197: .' '.
1198: &del('nohist_calculatedsheets_'.$cid,
1199: [$key.'assesscalc:'.$symb]);
1200: unless ($status eq 'ok ok') {
1201: &logthis('Could not devalidate spreadsheet '.
1202: $uname.' at '.$udom.' for '.
1203: $symb.': '.$status);
1204: }
1205: }
1206: }
1207:
1208: sub get_scalar {
1209: my ($string,$end) = @_;
1210: my $value;
1211: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1212: $value = $1;
1213: } elsif ($$string =~ s/^([^&]*?)&//) {
1214: $value = $1;
1215: }
1216: return &unescape($value);
1217: }
1218:
1219: sub array2str {
1220: my (@array) = @_;
1221: my $result=&arrayref2str(\@array);
1222: $result=~s/^__ARRAY_REF__//;
1223: $result=~s/__END_ARRAY_REF__$//;
1224: return $result;
1225: }
1226:
1227: sub arrayref2str {
1228: my ($arrayref) = @_;
1229: my $result='__ARRAY_REF__';
1230: foreach my $elem (@$arrayref) {
1231: if(ref($elem) eq 'ARRAY') {
1232: $result.=&arrayref2str($elem).'&';
1233: } elsif(ref($elem) eq 'HASH') {
1234: $result.=&hashref2str($elem).'&';
1235: } elsif(ref($elem)) {
1236: #print("Got a ref of ".(ref($elem))." skipping.");
1237: } else {
1238: $result.=&escape($elem).'&';
1239: }
1240: }
1241: $result=~s/\&$//;
1242: $result .= '__END_ARRAY_REF__';
1243: return $result;
1244: }
1245:
1246: sub hash2str {
1247: my (%hash) = @_;
1248: my $result=&hashref2str(\%hash);
1249: $result=~s/^__HASH_REF__//;
1250: $result=~s/__END_HASH_REF__$//;
1251: return $result;
1252: }
1253:
1254: sub hashref2str {
1255: my ($hashref)=@_;
1256: my $result='__HASH_REF__';
1257: foreach (keys(%$hashref)) {
1258: if (ref($_) eq 'ARRAY') {
1259: $result.=&arrayref2str($_).'=';
1260: } elsif (ref($_) eq 'HASH') {
1261: $result.=&hashref2str($_).'=';
1262: } elsif (ref($_)) {
1263: $result.='=';
1264: #print("Got a ref of ".(ref($_))." skipping.");
1265: } else {
1266: if ($_) {$result.=&escape($_).'=';} else { last; }
1267: }
1268:
1269: if(ref($hashref->{$_}) eq 'ARRAY') {
1270: $result.=&arrayref2str($hashref->{$_}).'&';
1271: } elsif(ref($hashref->{$_}) eq 'HASH') {
1272: $result.=&hashref2str($hashref->{$_}).'&';
1273: } elsif(ref($hashref->{$_})) {
1274: $result.='&';
1275: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1276: } else {
1277: $result.=&escape($hashref->{$_}).'&';
1278: }
1279: }
1280: $result=~s/\&$//;
1281: $result .= '__END_HASH_REF__';
1282: return $result;
1283: }
1284:
1285: sub str2hash {
1286: my ($string)=@_;
1287: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1288: return %$hash;
1289: }
1290:
1291: sub str2hashref {
1292: my ($string) = @_;
1293:
1294: my %hash;
1295:
1296: if($string !~ /^__HASH_REF__/) {
1297: if (! ($string eq '' || !defined($string))) {
1298: $hash{'error'}='Not hash reference';
1299: }
1300: return (\%hash, $string);
1301: }
1302:
1303: $string =~ s/^__HASH_REF__//;
1304:
1305: while($string !~ /^__END_HASH_REF__/) {
1306: #key
1307: my $key='';
1308: if($string =~ /^__HASH_REF__/) {
1309: ($key, $string)=&str2hashref($string);
1310: if(defined($key->{'error'})) {
1311: $hash{'error'}='Bad data';
1312: return (\%hash, $string);
1313: }
1314: } elsif($string =~ /^__ARRAY_REF__/) {
1315: ($key, $string)=&str2arrayref($string);
1316: if($key->[0] eq 'Array reference error') {
1317: $hash{'error'}='Bad data';
1318: return (\%hash, $string);
1319: }
1320: } else {
1321: $string =~ s/^(.*?)=//;
1322: $key=&unescape($1);
1323: }
1324: $string =~ s/^=//;
1325:
1326: #value
1327: my $value='';
1328: if($string =~ /^__HASH_REF__/) {
1329: ($value, $string)=&str2hashref($string);
1330: if(defined($value->{'error'})) {
1331: $hash{'error'}='Bad data';
1332: return (\%hash, $string);
1333: }
1334: } elsif($string =~ /^__ARRAY_REF__/) {
1335: ($value, $string)=&str2arrayref($string);
1336: if($value->[0] eq 'Array reference error') {
1337: $hash{'error'}='Bad data';
1338: return (\%hash, $string);
1339: }
1340: } else {
1341: $value=&get_scalar(\$string,'__END_HASH_REF__');
1342: }
1343: $string =~ s/^&//;
1344:
1345: $hash{$key}=$value;
1346: }
1347:
1348: $string =~ s/^__END_HASH_REF__//;
1349:
1350: return (\%hash, $string);
1351: }
1352:
1353: sub str2array {
1354: my ($string)=@_;
1355: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1356: return @$array;
1357: }
1358:
1359: sub str2arrayref {
1360: my ($string) = @_;
1361: my @array;
1362:
1363: if($string !~ /^__ARRAY_REF__/) {
1364: if (! ($string eq '' || !defined($string))) {
1365: $array[0]='Array reference error';
1366: }
1367: return (\@array, $string);
1368: }
1369:
1370: $string =~ s/^__ARRAY_REF__//;
1371:
1372: while($string !~ /^__END_ARRAY_REF__/) {
1373: my $value='';
1374: if($string =~ /^__HASH_REF__/) {
1375: ($value, $string)=&str2hashref($string);
1376: if(defined($value->{'error'})) {
1377: $array[0] ='Array reference error';
1378: return (\@array, $string);
1379: }
1380: } elsif($string =~ /^__ARRAY_REF__/) {
1381: ($value, $string)=&str2arrayref($string);
1382: if($value->[0] eq 'Array reference error') {
1383: $array[0] ='Array reference error';
1384: return (\@array, $string);
1385: }
1386: } else {
1387: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1388: }
1389: $string =~ s/^&//;
1390:
1391: push(@array, $value);
1392: }
1393:
1394: $string =~ s/^__END_ARRAY_REF__//;
1395:
1396: return (\@array, $string);
1397: }
1398:
1399: # -------------------------------------------------------------------Temp Store
1400:
1401: sub tmpreset {
1402: my ($symb,$namespace,$domain,$stuname) = @_;
1403: if (!$symb) {
1404: $symb=&symbread();
1405: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1406: }
1407: $symb=escape($symb);
1408:
1409: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1410: $namespace=~s/\//\_/g;
1411: $namespace=~s/\W//g;
1412:
1413: #FIXME needs to do something for /pub resources
1414: if (!$domain) { $domain=$ENV{'user.domain'}; }
1415: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1416: my $path=$perlvar{'lonDaemons'}.'/tmp';
1417: my %hash;
1418: if (tie(%hash,'GDBM_File',
1419: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1420: &GDBM_WRCREAT(),0640)) {
1421: foreach my $key (keys %hash) {
1422: if ($key=~ /:$symb/) {
1423: delete($hash{$key});
1424: }
1425: }
1426: }
1427: }
1428:
1429: sub tmpstore {
1430: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1431:
1432: if (!$symb) {
1433: $symb=&symbread();
1434: if (!$symb) { $symb= $ENV{'request.url'}; }
1435: }
1436: $symb=escape($symb);
1437:
1438: if (!$namespace) {
1439: # I don't think we would ever want to store this for a course.
1440: # it seems this will only be used if we don't have a course.
1441: #$namespace=$ENV{'request.course.id'};
1442: #if (!$namespace) {
1443: $namespace=$ENV{'request.state'};
1444: #}
1445: }
1446: $namespace=~s/\//\_/g;
1447: $namespace=~s/\W//g;
1448: #FIXME needs to do something for /pub resources
1449: if (!$domain) { $domain=$ENV{'user.domain'}; }
1450: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1451: my $now=time;
1452: my %hash;
1453: my $path=$perlvar{'lonDaemons'}.'/tmp';
1454: if (tie(%hash,'GDBM_File',
1455: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1456: &GDBM_WRCREAT(),0640)) {
1457: $hash{"version:$symb"}++;
1458: my $version=$hash{"version:$symb"};
1459: my $allkeys='';
1460: foreach my $key (keys(%$storehash)) {
1461: $allkeys.=$key.':';
1462: $hash{"$version:$symb:$key"}=$$storehash{$key};
1463: }
1464: $hash{"$version:$symb:timestamp"}=$now;
1465: $allkeys.='timestamp';
1466: $hash{"$version:keys:$symb"}=$allkeys;
1467: if (untie(%hash)) {
1468: return 'ok';
1469: } else {
1470: return "error:$!";
1471: }
1472: } else {
1473: return "error:$!";
1474: }
1475: }
1476:
1477: # -----------------------------------------------------------------Temp Restore
1478:
1479: sub tmprestore {
1480: my ($symb,$namespace,$domain,$stuname) = @_;
1481:
1482: if (!$symb) {
1483: $symb=&symbread();
1484: if (!$symb) { $symb= $ENV{'request.url'}; }
1485: }
1486: $symb=escape($symb);
1487:
1488: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1489: #FIXME needs to do something for /pub resources
1490: if (!$domain) { $domain=$ENV{'user.domain'}; }
1491: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1492:
1493: my %returnhash;
1494: $namespace=~s/\//\_/g;
1495: $namespace=~s/\W//g;
1496: my %hash;
1497: my $path=$perlvar{'lonDaemons'}.'/tmp';
1498: if (tie(%hash,'GDBM_File',
1499: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1500: &GDBM_READER(),0640)) {
1501: my $version=$hash{"version:$symb"};
1502: $returnhash{'version'}=$version;
1503: my $scope;
1504: for ($scope=1;$scope<=$version;$scope++) {
1505: my $vkeys=$hash{"$scope:keys:$symb"};
1506: my @keys=split(/:/,$vkeys);
1507: my $key;
1508: $returnhash{"$scope:keys"}=$vkeys;
1509: foreach $key (@keys) {
1510: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1511: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1512: }
1513: }
1514: if (!(untie(%hash))) {
1515: return "error:$!";
1516: }
1517: } else {
1518: return "error:$!";
1519: }
1520: return %returnhash;
1521: }
1522:
1523: # ----------------------------------------------------------------------- Store
1524:
1525: sub store {
1526: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1527: my $home='';
1528:
1529: if ($stuname) { $home=&homeserver($stuname,$domain); }
1530:
1531: $symb=&symbclean($symb);
1532: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1533:
1534: if (!$domain) { $domain=$ENV{'user.domain'}; }
1535: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1536:
1537: &devalidate($symb,$stuname,$domain);
1538:
1539: $symb=escape($symb);
1540: if (!$namespace) {
1541: unless ($namespace=$ENV{'request.course.id'}) {
1542: return '';
1543: }
1544: }
1545: if (!$home) { $home=$ENV{'user.home'}; }
1546: my $namevalue='';
1547: foreach (keys %$storehash) {
1548: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1549: }
1550: $namevalue=~s/\&$//;
1551: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1552: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1553: }
1554:
1555: # -------------------------------------------------------------- Critical Store
1556:
1557: sub cstore {
1558: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1559: my $home='';
1560:
1561: if ($stuname) { $home=&homeserver($stuname,$domain); }
1562:
1563: $symb=&symbclean($symb);
1564: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1565:
1566: if (!$domain) { $domain=$ENV{'user.domain'}; }
1567: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1568:
1569: &devalidate($symb,$stuname,$domain);
1570:
1571: $symb=escape($symb);
1572: if (!$namespace) {
1573: unless ($namespace=$ENV{'request.course.id'}) {
1574: return '';
1575: }
1576: }
1577: if (!$home) { $home=$ENV{'user.home'}; }
1578:
1579: my $namevalue='';
1580: foreach (keys %$storehash) {
1581: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1582: }
1583: $namevalue=~s/\&$//;
1584: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1585: return critical
1586: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1587: }
1588:
1589: # --------------------------------------------------------------------- Restore
1590:
1591: sub restore {
1592: my ($symb,$namespace,$domain,$stuname) = @_;
1593: my $home='';
1594:
1595: if ($stuname) { $home=&homeserver($stuname,$domain); }
1596:
1597: if (!$symb) {
1598: unless ($symb=escape(&symbread())) { return ''; }
1599: } else {
1600: $symb=&escape(&symbclean($symb));
1601: }
1602: if (!$namespace) {
1603: unless ($namespace=$ENV{'request.course.id'}) {
1604: return '';
1605: }
1606: }
1607: if (!$domain) { $domain=$ENV{'user.domain'}; }
1608: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1609: if (!$home) { $home=$ENV{'user.home'}; }
1610: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1611:
1612: my %returnhash=();
1613: foreach (split(/\&/,$answer)) {
1614: my ($name,$value)=split(/\=/,$_);
1615: $returnhash{&unescape($name)}=&unescape($value);
1616: }
1617: my $version;
1618: for ($version=1;$version<=$returnhash{'version'};$version++) {
1619: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1620: $returnhash{$_}=$returnhash{$version.':'.$_};
1621: }
1622: }
1623: return %returnhash;
1624: }
1625:
1626: # ---------------------------------------------------------- Course Description
1627:
1628: sub coursedescription {
1629: my $courseid=shift;
1630: $courseid=~s/^\///;
1631: $courseid=~s/\_/\//g;
1632: my ($cdomain,$cnum)=split(/\//,$courseid);
1633: my $chome=&homeserver($cnum,$cdomain);
1634: my $normalid=$cdomain.'_'.$cnum;
1635: # need to always cache even if we get errors otherwise we keep
1636: # trying and trying and trying to get the course description.
1637: my %envhash=();
1638: my %returnhash=();
1639: $envhash{'course.'.$normalid.'.last_cache'}=time;
1640: if ($chome ne 'no_host') {
1641: %returnhash=&dump('environment',$cdomain,$cnum);
1642: if (!exists($returnhash{'con_lost'})) {
1643: $returnhash{'home'}= $chome;
1644: $returnhash{'domain'} = $cdomain;
1645: $returnhash{'num'} = $cnum;
1646: while (my ($name,$value) = each %returnhash) {
1647: $envhash{'course.'.$normalid.'.'.$name}=$value;
1648: }
1649: $returnhash{'url'}=&clutter($returnhash{'url'});
1650: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1651: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1652: $envhash{'course.'.$normalid.'.home'}=$chome;
1653: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1654: $envhash{'course.'.$normalid.'.num'}=$cnum;
1655: }
1656: }
1657: &appenv(%envhash);
1658: return %returnhash;
1659: }
1660:
1661: # -------------------------------------------------------- Get user privileges
1662:
1663: sub rolesinit {
1664: my ($domain,$username,$authhost)=@_;
1665: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1666: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1667: my %allroles=();
1668: my %thesepriv=();
1669: my $now=time;
1670: my $userroles="user.login.time=$now\n";
1671: my $thesestr;
1672:
1673: if ($rolesdump ne '') {
1674: foreach (split(/&/,$rolesdump)) {
1675: if ($_!~/^rolesdef\&/) {
1676: my ($area,$role)=split(/=/,$_);
1677: $area=~s/\_\w\w$//;
1678: my ($trole,$tend,$tstart)=split(/_/,$role);
1679: $userroles.='user.role.'.$trole.'.'.$area.'='.
1680: $tstart.'.'.$tend."\n";
1681: if ($tend!=0) {
1682: if ($tend<$now) {
1683: $trole='';
1684: }
1685: }
1686: if ($tstart!=0) {
1687: if ($tstart>$now) {
1688: $trole='';
1689: }
1690: }
1691: if (($area ne '') && ($trole ne '')) {
1692: my $spec=$trole.'.'.$area;
1693: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1694: if ($trole =~ /^cr\//) {
1695: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1696: my $homsvr=homeserver($rauthor,$rdomain);
1697: if ($hostname{$homsvr} ne '') {
1698: my $roledef=
1699: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1700: $homsvr);
1701: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1702: my ($syspriv,$dompriv,$coursepriv)=
1703: split(/\_/,unescape($roledef));
1704: $allroles{'cm./'}.=':'.$syspriv;
1705: $allroles{$spec.'./'}.=':'.$syspriv;
1706: if ($tdomain ne '') {
1707: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1708: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1709: if ($trest ne '') {
1710: $allroles{'cm.'.$area}.=':'.$coursepriv;
1711: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1712: }
1713: }
1714: }
1715: }
1716: } else {
1717: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1718: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1719: if ($tdomain ne '') {
1720: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1721: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1722: if ($trest ne '') {
1723: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1724: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1725: }
1726: }
1727: }
1728: }
1729: }
1730: }
1731: my $adv=0;
1732: my $author=0;
1733: foreach (keys %allroles) {
1734: %thesepriv=();
1735: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1736: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1737: foreach (split(/:/,$allroles{$_})) {
1738: if ($_ ne '') {
1739: my ($privilege,$restrictions)=split(/&/,$_);
1740: if ($restrictions eq '') {
1741: $thesepriv{$privilege}='F';
1742: } else {
1743: if ($thesepriv{$privilege} ne 'F') {
1744: $thesepriv{$privilege}.=$restrictions;
1745: }
1746: }
1747: }
1748: }
1749: $thesestr='';
1750: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1751: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1752: }
1753: $userroles.='user.adv='.$adv."\n".
1754: 'user.author='.$author."\n";
1755: $ENV{'user.adv'}=$adv;
1756: }
1757: return $userroles;
1758: }
1759:
1760: # --------------------------------------------------------------- get interface
1761:
1762: sub get {
1763: my ($namespace,$storearr,$udomain,$uname)=@_;
1764: my $items='';
1765: foreach (@$storearr) {
1766: $items.=escape($_).'&';
1767: }
1768: $items=~s/\&$//;
1769: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1770: if (!$uname) { $uname=$ENV{'user.name'}; }
1771: my $uhome=&homeserver($uname,$udomain);
1772:
1773: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1774: my @pairs=split(/\&/,$rep);
1775: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1776: return @pairs;
1777: }
1778: my %returnhash=();
1779: my $i=0;
1780: foreach (@$storearr) {
1781: $returnhash{$_}=unescape($pairs[$i]);
1782: $i++;
1783: }
1784: return %returnhash;
1785: }
1786:
1787: # --------------------------------------------------------------- del interface
1788:
1789: sub del {
1790: my ($namespace,$storearr,$udomain,$uname)=@_;
1791: my $items='';
1792: foreach (@$storearr) {
1793: $items.=escape($_).'&';
1794: }
1795: $items=~s/\&$//;
1796: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1797: if (!$uname) { $uname=$ENV{'user.name'}; }
1798: my $uhome=&homeserver($uname,$udomain);
1799:
1800: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1801: }
1802:
1803: # -------------------------------------------------------------- dump interface
1804:
1805: sub dump {
1806: my ($namespace,$udomain,$uname,$regexp)=@_;
1807: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1808: if (!$uname) { $uname=$ENV{'user.name'}; }
1809: my $uhome=&homeserver($uname,$udomain);
1810: if ($regexp) {
1811: $regexp=&escape($regexp);
1812: } else {
1813: $regexp='.';
1814: }
1815: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1816: my @pairs=split(/\&/,$rep);
1817: my %returnhash=();
1818: foreach (@pairs) {
1819: my ($key,$value)=split(/=/,$_);
1820: $returnhash{unescape($key)}=unescape($value);
1821: }
1822: return %returnhash;
1823: }
1824:
1825: # --------------------------------------------------------------- currentdump
1826: sub currentdump {
1827: my ($courseid,$sdom,$sname)=@_;
1828: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1829: $sdom = $ENV{'user.domain'} if (! defined($sdom));
1830: $sname = $ENV{'user.name'} if (! defined($sname));
1831: my $uhome = &homeserver($sname,$sdom);
1832: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
1833: return if ($rep =~ /^(error:|no_such_host)/);
1834: #
1835: my %returnhash=();
1836: #
1837: if ($rep eq "unknown_cmd") {
1838: # an old lond will not know currentdump
1839: # Do a dump and make it look like a currentdump
1840: my @tmp = &dump($courseid,$sdom,$sname,'.');
1841: return if ($tmp[0] =~ /^(error:|no_such_host)/);
1842: my %hash = @tmp;
1843: @tmp=();
1844: # Code ripped from lond, essentially. The only difference
1845: # here is the unescaping done by lonnet::dump(). Conceivably
1846: # we might run in to problems with parameter names =~ /^v\./
1847: while (my ($key,$value) = each(%hash)) {
1848: my ($v,$symb,$param) = split(/:/,$key);
1849: next if ($v eq 'version' || $symb eq 'keys');
1850: next if (exists($returnhash{$symb}) &&
1851: exists($returnhash{$symb}->{$param}) &&
1852: $returnhash{$symb}->{'v.'.$param} > $v);
1853: $returnhash{$symb}->{$param}=$value;
1854: $returnhash{$symb}->{'v.'.$param}=$v;
1855: }
1856: #
1857: # Remove all of the keys in the hashes which keep track of
1858: # the version of the parameter.
1859: while (my ($symb,$param_hash) = each(%returnhash)) {
1860: # use a foreach because we are going to delete from the hash.
1861: foreach my $key (keys(%$param_hash)) {
1862: delete($param_hash->{$key}) if ($key =~ /^v\./);
1863: }
1864: }
1865: } else {
1866: my @pairs=split(/\&/,$rep);
1867: foreach (@pairs) {
1868: my ($key,$value)=split(/=/,$_);
1869: my ($symb,$param) = split(/:/,$key);
1870: $returnhash{&unescape($symb)}->{&unescape($param)} =
1871: &unescape($value);
1872: }
1873: }
1874: return %returnhash;
1875: }
1876:
1877: # --------------------------------------------------------------- put interface
1878:
1879: sub put {
1880: my ($namespace,$storehash,$udomain,$uname)=@_;
1881: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1882: if (!$uname) { $uname=$ENV{'user.name'}; }
1883: my $uhome=&homeserver($uname,$udomain);
1884: my $items='';
1885: foreach (keys %$storehash) {
1886: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1887: }
1888: $items=~s/\&$//;
1889: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1890: }
1891:
1892: # ------------------------------------------------------ critical put interface
1893:
1894: sub cput {
1895: my ($namespace,$storehash,$udomain,$uname)=@_;
1896: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1897: if (!$uname) { $uname=$ENV{'user.name'}; }
1898: my $uhome=&homeserver($uname,$udomain);
1899: my $items='';
1900: foreach (keys %$storehash) {
1901: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1902: }
1903: $items=~s/\&$//;
1904: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1905: }
1906:
1907: # -------------------------------------------------------------- eget interface
1908:
1909: sub eget {
1910: my ($namespace,$storearr,$udomain,$uname)=@_;
1911: my $items='';
1912: foreach (@$storearr) {
1913: $items.=escape($_).'&';
1914: }
1915: $items=~s/\&$//;
1916: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1917: if (!$uname) { $uname=$ENV{'user.name'}; }
1918: my $uhome=&homeserver($uname,$udomain);
1919: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1920: my @pairs=split(/\&/,$rep);
1921: my %returnhash=();
1922: my $i=0;
1923: foreach (@$storearr) {
1924: $returnhash{$_}=unescape($pairs[$i]);
1925: $i++;
1926: }
1927: return %returnhash;
1928: }
1929:
1930: # ---------------------------------------------- Custom access rule evaluation
1931:
1932: sub customaccess {
1933: my ($priv,$uri)=@_;
1934: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
1935: $urealm=~s/^\W//;
1936: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
1937: my $access=0;
1938: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
1939: my ($effect,$realm,$role)=split(/\:/,$_);
1940: if ($role) {
1941: if ($role ne $urole) { next; }
1942: }
1943: foreach (split(/\s*\,\s*/,$realm)) {
1944: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
1945: if ($tdom) {
1946: if ($tdom ne $udom) { next; }
1947: }
1948: if ($tcrs) {
1949: if ($tcrs ne $ucrs) { next; }
1950: }
1951: if ($tsec) {
1952: if ($tsec ne $usec) { next; }
1953: }
1954: $access=($effect eq 'allow');
1955: last;
1956: }
1957: }
1958: return $access;
1959: }
1960:
1961: # ------------------------------------------------- Check for a user privilege
1962:
1963: sub allowed {
1964: my ($priv,$uri)=@_;
1965:
1966: my $orguri=$uri;
1967: $uri=&declutter($uri);
1968:
1969: # Free bre access to adm and meta resources
1970:
1971: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1972: return 'F';
1973: }
1974:
1975: # Free bre to public access
1976:
1977: if ($priv eq 'bre') {
1978: my $copyright=&metadata($uri,'copyright');
1979: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
1980: return 'F';
1981: }
1982: if ($copyright eq 'priv') {
1983: $uri=~/([^\/]+)\/([^\/]+)\//;
1984: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
1985: return '';
1986: }
1987: }
1988: if ($copyright eq 'domain') {
1989: $uri=~/([^\/]+)\/([^\/]+)\//;
1990: unless (($ENV{'user.domain'} eq $1) ||
1991: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
1992: return '';
1993: }
1994: }
1995: if ($ENV{'request.role'}=~ /li\.\//) {
1996: # Library role, so allow browsing of resources in this domain.
1997: return 'F';
1998: }
1999: if ($copyright eq 'custom') {
2000: unless (&customaccess($priv,$uri)) { return ''; }
2001: }
2002: }
2003: # Domain coordinator is trying to create a course
2004: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2005: # uri is the requested domain in this case.
2006: # comparison to 'request.role.domain' shows if the user has selected
2007: # a role of dc for the domain in question.
2008: return 'F' if ($uri eq $ENV{'request.role.domain'});
2009: }
2010:
2011: my $thisallowed='';
2012: my $statecond=0;
2013: my $courseprivid='';
2014:
2015: # Course
2016:
2017: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2018: $thisallowed.=$1;
2019: }
2020:
2021: # Domain
2022:
2023: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2024: =~/$priv\&([^\:]*)/) {
2025: $thisallowed.=$1;
2026: }
2027:
2028: # Course: uri itself is a course
2029: my $courseuri=$uri;
2030: $courseuri=~s/\_(\d)/\/$1/;
2031: $courseuri=~s/^([^\/])/\/$1/;
2032:
2033: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2034: =~/$priv\&([^\:]*)/) {
2035: $thisallowed.=$1;
2036: }
2037:
2038: # URI is an uploaded document for this course
2039:
2040: if (($priv eq 'bre') &&
2041: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2042: return 'F';
2043: }
2044: # Full access at system, domain or course-wide level? Exit.
2045:
2046: if ($thisallowed=~/F/) {
2047: return 'F';
2048: }
2049:
2050: # If this is generating or modifying users, exit with special codes
2051:
2052: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
2053: return $thisallowed;
2054: }
2055: #
2056: # Gathered so far: system, domain and course wide privileges
2057: #
2058: # Course: See if uri or referer is an individual resource that is part of
2059: # the course
2060:
2061: if ($ENV{'request.course.id'}) {
2062:
2063: $courseprivid=$ENV{'request.course.id'};
2064: if ($ENV{'request.course.sec'}) {
2065: $courseprivid.='/'.$ENV{'request.course.sec'};
2066: }
2067: $courseprivid=~s/\_/\//;
2068: my $checkreferer=1;
2069: my ($match,$cond)=&is_on_map($uri);
2070: if ($match) {
2071: $statecond=$cond;
2072: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2073: =~/$priv\&([^\:]*)/) {
2074: $thisallowed.=$1;
2075: $checkreferer=0;
2076: }
2077: }
2078:
2079: if ($checkreferer) {
2080: my $refuri=$ENV{'httpref.'.$orguri};
2081: unless ($refuri) {
2082: foreach (keys %ENV) {
2083: if ($_=~/^httpref\..*\*/) {
2084: my $pattern=$_;
2085: $pattern=~s/^httpref\.\/res\///;
2086: $pattern=~s/\*/\[\^\/\]\+/g;
2087: $pattern=~s/\//\\\//g;
2088: if ($orguri=~/$pattern/) {
2089: $refuri=$ENV{$_};
2090: }
2091: }
2092: }
2093: }
2094:
2095: if ($refuri) {
2096: $refuri=&declutter($refuri);
2097: my ($match,$cond)=&is_on_map($refuri);
2098: if ($match) {
2099: my $refstatecond=$cond;
2100: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2101: =~/$priv\&([^\:]*)/) {
2102: $thisallowed.=$1;
2103: $uri=$refuri;
2104: $statecond=$refstatecond;
2105: }
2106: }
2107: }
2108: }
2109: }
2110:
2111: #
2112: # Gathered now: all privileges that could apply, and condition number
2113: #
2114: #
2115: # Full or no access?
2116: #
2117:
2118: if ($thisallowed=~/F/) {
2119: return 'F';
2120: }
2121:
2122: unless ($thisallowed) {
2123: return '';
2124: }
2125:
2126: # Restrictions exist, deal with them
2127: #
2128: # C:according to course preferences
2129: # R:according to resource settings
2130: # L:unless locked
2131: # X:according to user session state
2132: #
2133:
2134: # Possibly locked functionality, check all courses
2135: # Locks might take effect only after 10 minutes cache expiration for other
2136: # courses, and 2 minutes for current course
2137:
2138: my $envkey;
2139: if ($thisallowed=~/L/) {
2140: foreach $envkey (keys %ENV) {
2141: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2142: my $courseid=$2;
2143: my $roleid=$1.'.'.$2;
2144: $courseid=~s/^\///;
2145: my $expiretime=600;
2146: if ($ENV{'request.role'} eq $roleid) {
2147: $expiretime=120;
2148: }
2149: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2150: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2151: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2152: &coursedescription($courseid);
2153: }
2154: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2155: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2156: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2157: &log($ENV{'user.domain'},$ENV{'user.name'},
2158: $ENV{'user.home'},
2159: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2160: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2161: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2162: return '';
2163: }
2164: }
2165: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2166: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2167: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2168: &log($ENV{'user.domain'},$ENV{'user.name'},
2169: $ENV{'user.home'},
2170: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2171: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2172: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2173: return '';
2174: }
2175: }
2176: }
2177: }
2178: }
2179:
2180: #
2181: # Rest of the restrictions depend on selected course
2182: #
2183:
2184: unless ($ENV{'request.course.id'}) {
2185: return '1';
2186: }
2187:
2188: #
2189: # Now user is definitely in a course
2190: #
2191:
2192:
2193: # Course preferences
2194:
2195: if ($thisallowed=~/C/) {
2196: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2197: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2198: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2199: =~/$rolecode/) {
2200: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2201: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2202: $ENV{'request.course.id'});
2203: return '';
2204: }
2205:
2206: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2207: =~/$unamedom/) {
2208: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2209: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2210: $ENV{'request.course.id'});
2211: return '';
2212: }
2213: }
2214:
2215: # Resource preferences
2216:
2217: if ($thisallowed=~/R/) {
2218: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2219: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2220: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2221: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2222: return '';
2223: }
2224: }
2225:
2226: # Restricted by state or randomout?
2227:
2228: if ($thisallowed=~/X/) {
2229: if ($ENV{'acc.randomout'}) {
2230: my $symb=&symbread($uri,1);
2231: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2232: return '';
2233: }
2234: }
2235: if (&condval($statecond)) {
2236: return '2';
2237: } else {
2238: return '';
2239: }
2240: }
2241:
2242: return 'F';
2243: }
2244:
2245: # --------------------------------------------------- Is a resource on the map?
2246:
2247: sub is_on_map {
2248: my $uri=&declutter(shift);
2249: my @uriparts=split(/\//,$uri);
2250: my $filename=$uriparts[$#uriparts];
2251: my $pathname=$uri;
2252: $pathname=~s|/\Q$filename\E$||;
2253: $pathname=~s/^adm\/wrapper\///;
2254: #Trying to find the conditional for the file
2255: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2256: /\&\Q$filename\E\:([\d\|]+)\&/);
2257: if ($match) {
2258: return (1,$1);
2259: } else {
2260: return (0,0);
2261: }
2262: }
2263:
2264: # ----------------------------------------------------------------- Define Role
2265:
2266: sub definerole {
2267: if (allowed('mcr','/')) {
2268: my ($rolename,$sysrole,$domrole,$courole)=@_;
2269: foreach (split('/',$sysrole)) {
2270: my ($crole,$cqual)=split(/\&/,$_);
2271: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2272: if ($pr{'cr:s'}=~/$crole\&/) {
2273: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2274: return "refused:s:$crole&$cqual";
2275: }
2276: }
2277: }
2278: foreach (split('/',$domrole)) {
2279: my ($crole,$cqual)=split(/\&/,$_);
2280: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2281: if ($pr{'cr:d'}=~/$crole\&/) {
2282: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2283: return "refused:d:$crole&$cqual";
2284: }
2285: }
2286: }
2287: foreach (split('/',$courole)) {
2288: my ($crole,$cqual)=split(/\&/,$_);
2289: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2290: if ($pr{'cr:c'}=~/$crole\&/) {
2291: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2292: return "refused:c:$crole&$cqual";
2293: }
2294: }
2295: }
2296: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2297: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2298: "rolesdef_$rolename=".
2299: escape($sysrole.'_'.$domrole.'_'.$courole);
2300: return reply($command,$ENV{'user.home'});
2301: } else {
2302: return 'refused';
2303: }
2304: }
2305:
2306: # ---------------- Make a metadata query against the network of library servers
2307:
2308: sub metadata_query {
2309: my ($query,$custom,$customshow,$server_array)=@_;
2310: my %rhash;
2311: my @server_list = (defined($server_array) ? @$server_array
2312: : keys(%libserv) );
2313: for my $server (@server_list) {
2314: unless ($custom or $customshow) {
2315: my $reply=&reply("querysend:".&escape($query),$server);
2316: $rhash{$server}=$reply;
2317: }
2318: else {
2319: my $reply=&reply("querysend:".&escape($query).':'.
2320: &escape($custom).':'.&escape($customshow),
2321: $server);
2322: $rhash{$server}=$reply;
2323: }
2324: }
2325: return \%rhash;
2326: }
2327:
2328: # ----------------------------------------- Send log queries and wait for reply
2329:
2330: sub log_query {
2331: my ($uname,$udom,$query,%filters)=@_;
2332: my $uhome=&homeserver($uname,$udom);
2333: if ($uhome eq 'no_host') { return 'error: no_host'; }
2334: my $uhost=$hostname{$uhome};
2335: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2336: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2337: $uhome);
2338: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2339: return get_query_reply($queryid);
2340: }
2341:
2342: sub get_query_reply {
2343: my $queryid=shift;
2344: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2345: my $reply='';
2346: for (1..100) {
2347: sleep 2;
2348: if (-e $replyfile.'.end') {
2349: if (my $fh=Apache::File->new($replyfile)) {
2350: $reply.=<$fh>;
2351: $fh->close;
2352: } else { return 'error: reply_file_error'; }
2353: return &unescape($reply);
2354: }
2355: }
2356: return 'timeout:'.$queryid;
2357: }
2358:
2359: sub courselog_query {
2360: #
2361: # possible filters:
2362: # url: url or symb
2363: # username
2364: # domain
2365: # action: view, submit, grade
2366: # start: timestamp
2367: # end: timestamp
2368: #
2369: my (%filters)=@_;
2370: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2371: if ($filters{'url'}) {
2372: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2373: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2374: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2375: }
2376: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2377: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2378: return &log_query($cname,$cdom,'courselog',%filters);
2379: }
2380:
2381: sub userlog_query {
2382: my ($uname,$udom,%filters)=@_;
2383: return &log_query($uname,$udom,'userlog',%filters);
2384: }
2385:
2386: # ------------------------------------------------------------------ Plain Text
2387:
2388: sub plaintext {
2389: my $short=shift;
2390: return $prp{$short};
2391: }
2392:
2393: # ----------------------------------------------------------------- Assign Role
2394:
2395: sub assignrole {
2396: my ($udom,$uname,$url,$role,$end,$start)=@_;
2397: my $mrole;
2398: if ($role =~ /^cr\//) {
2399: unless (&allowed('ccr',$url)) {
2400: &logthis('Refused custom assignrole: '.
2401: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2402: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2403: return 'refused';
2404: }
2405: $mrole='cr';
2406: } else {
2407: my $cwosec=$url;
2408: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2409: unless (&allowed('c'.$role,$cwosec)) {
2410: &logthis('Refused assignrole: '.
2411: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2412: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2413: return 'refused';
2414: }
2415: $mrole=$role;
2416: }
2417: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2418: "$udom:$uname:$url".'_'."$mrole=$role";
2419: if ($end) { $command.='_'.$end; }
2420: if ($start) {
2421: if ($end) {
2422: $command.='_'.$start;
2423: } else {
2424: $command.='_0_'.$start;
2425: }
2426: }
2427: return &reply($command,&homeserver($uname,$udom));
2428: }
2429:
2430: # -------------------------------------------------- Modify user authentication
2431: # Overrides without validation
2432:
2433: sub modifyuserauth {
2434: my ($udom,$uname,$umode,$upass)=@_;
2435: my $uhome=&homeserver($uname,$udom);
2436: unless (&allowed('mau',$udom)) { return 'refused'; }
2437: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2438: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2439: ' in domain '.$ENV{'request.role.domain'});
2440: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2441: &escape($upass),$uhome);
2442: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2443: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2444: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2445: &log($udom,,$uname,$uhome,
2446: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2447: $ENV{'user.name'}.', '.$umode.
2448: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2449: unless ($reply eq 'ok') {
2450: &logthis('Authentication mode error: '.$reply);
2451: return 'error: '.$reply;
2452: }
2453: return 'ok';
2454: }
2455:
2456: # --------------------------------------------------------------- Modify a user
2457:
2458: sub modifyuser {
2459: my ($udom, $uname, $uid,
2460: $umode, $upass, $first,
2461: $middle, $last, $gene,
2462: $forceid, $desiredhome)=@_;
2463: $udom=~s/\W//g;
2464: $uname=~s/\W//g;
2465: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2466: $umode.', '.$first.', '.$middle.', '.
2467: $last.', '.$gene.'(forceid: '.$forceid.')'.
2468: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2469: ' desiredhome not specified').
2470: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2471: ' in domain '.$ENV{'request.role.domain'});
2472: my $uhome=&homeserver($uname,$udom,'true');
2473: # ----------------------------------------------------------------- Create User
2474: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2475: my $unhome='';
2476: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2477: $unhome = $desiredhome;
2478: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2479: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2480: } else { # load balancing routine for determining $unhome
2481: my $tryserver;
2482: my $loadm=10000000;
2483: foreach $tryserver (keys %libserv) {
2484: if ($hostdom{$tryserver} eq $udom) {
2485: my $answer=reply('load',$tryserver);
2486: if (($answer=~/\d+/) && ($answer<$loadm)) {
2487: $loadm=$answer;
2488: $unhome=$tryserver;
2489: }
2490: }
2491: }
2492: }
2493: if (($unhome eq '') || ($unhome eq 'no_host')) {
2494: return 'error: unable to find a home server for '.$uname.
2495: ' in domain '.$udom;
2496: }
2497: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2498: &escape($upass),$unhome);
2499: unless ($reply eq 'ok') {
2500: return 'error: '.$reply;
2501: }
2502: $uhome=&homeserver($uname,$udom,'true');
2503: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2504: return 'error: verify home';
2505: }
2506: } # End of creation of new user
2507: # ---------------------------------------------------------------------- Add ID
2508: if ($uid) {
2509: $uid=~tr/A-Z/a-z/;
2510: my %uidhash=&idrget($udom,$uname);
2511: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2512: && (!$forceid)) {
2513: unless ($uid eq $uidhash{$uname}) {
2514: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2515: }
2516: } else {
2517: &idput($udom,($uname => $uid));
2518: }
2519: }
2520: # -------------------------------------------------------------- Add names, etc
2521: my @tmp=&get('environment',
2522: ['firstname','middlename','lastname','generation'],
2523: $udom,$uname);
2524: my %names;
2525: if ($tmp[0] =~ m/^error:.*/) {
2526: %names=();
2527: } else {
2528: %names = @tmp;
2529: }
2530: if ($first) { $names{'firstname'} = $first; }
2531: if ($middle) { $names{'middlename'} = $middle; }
2532: if ($last) { $names{'lastname'} = $last; }
2533: if ($gene) { $names{'generation'} = $gene; }
2534: my $reply = &put('environment', \%names, $udom,$uname);
2535: if ($reply ne 'ok') { return 'error: '.$reply; }
2536: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2537: $umode.', '.$first.', '.$middle.', '.
2538: $last.', '.$gene.' by '.
2539: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2540: return 'ok';
2541: }
2542:
2543: # -------------------------------------------------------------- Modify student
2544:
2545: sub modifystudent {
2546: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2547: $end,$start,$forceid,$desiredhome)=@_;
2548: my $cid='';
2549: unless ($cid=$ENV{'request.course.id'}) {
2550: return 'not_in_class';
2551: }
2552: # --------------------------------------------------------------- Make the user
2553: my $reply=&modifyuser
2554: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2555: $desiredhome);
2556: unless ($reply eq 'ok') { return $reply; }
2557: # This will cause &modify_student_enrollment to get the uid from the
2558: # students environment
2559: $uid = undef if (!$forceid);
2560: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2561: $last,$gene,$usec,$end,$start);
2562: return $reply;
2563: }
2564:
2565: sub modify_student_enrollment {
2566: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2567: # Get the course id from the environment
2568: my $cid='';
2569: unless ($cid=$ENV{'request.course.id'}) {
2570: return 'not_in_class';
2571: }
2572: # Make sure the user exists
2573: my $uhome=&homeserver($uname,$udom);
2574: if (($uhome eq '') || ($uhome eq 'no_host')) {
2575: return 'error: no such user';
2576: }
2577: #
2578: # Get student data if we were not given enough information
2579: if (!defined($first) || $first eq '' ||
2580: !defined($last) || $last eq '' ||
2581: !defined($uid) || $uid eq '' ||
2582: !defined($middle) || $middle eq '' ||
2583: !defined($gene) || $gene eq '') {
2584: # They did not supply us with enough data to enroll the student, so
2585: # we need to pick up more information.
2586: my %tmp = &get('environment',
2587: ['firstname','middlename','lastname', 'generation','id']
2588: ,$udom,$uname);
2589:
2590: foreach (keys(%tmp)) {
2591: &logthis("key $_ = ".$tmp{$_});
2592: }
2593: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2594: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2595: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
2596: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
2597: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2598: }
2599: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2600: $first,$middle);
2601: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2602: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2603: &escape($uname.':'.$udom).'='.
2604: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
2605: $ENV{'course.'.$cid.'.home'});
2606: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2607: return 'error: '.$reply;
2608: }
2609: # Add student role to user
2610: my $uurl='/'.$cid;
2611: $uurl=~s/\_/\//g;
2612: if ($usec) {
2613: $uurl.='/'.$usec;
2614: }
2615: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2616: }
2617:
2618: # ------------------------------------------------- Write to course preferences
2619:
2620: sub writecoursepref {
2621: my ($courseid,%prefs)=@_;
2622: $courseid=~s/^\///;
2623: $courseid=~s/\_/\//g;
2624: my ($cdomain,$cnum)=split(/\//,$courseid);
2625: my $chome=homeserver($cnum,$cdomain);
2626: if (($chome eq '') || ($chome eq 'no_host')) {
2627: return 'error: no such course';
2628: }
2629: my $cstring='';
2630: foreach (keys %prefs) {
2631: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2632: }
2633: $cstring=~s/\&$//;
2634: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2635: }
2636:
2637: # ---------------------------------------------------------- Make/modify course
2638:
2639: sub createcourse {
2640: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2641: $url=&declutter($url);
2642: my $cid='';
2643: unless (&allowed('ccc',$udom)) {
2644: return 'refused';
2645: }
2646: # ------------------------------------------------------------------- Create ID
2647: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2648: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2649: # ----------------------------------------------- Make sure that does not exist
2650: my $uhome=&homeserver($uname,$udom,'true');
2651: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2652: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2653: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2654: $uhome=&homeserver($uname,$udom,'true');
2655: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2656: return 'error: unable to generate unique course-ID';
2657: }
2658: }
2659: # ------------------------------------------------ Check supplied server name
2660: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2661: if (! exists($libserv{$course_server})) {
2662: return 'error:bad server name '.$course_server;
2663: }
2664: # ------------------------------------------------------------- Make the course
2665: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2666: $course_server);
2667: unless ($reply eq 'ok') { return 'error: '.$reply; }
2668: $uhome=&homeserver($uname,$udom,'true');
2669: if (($uhome eq '') || ($uhome eq 'no_host')) {
2670: return 'error: no such course';
2671: }
2672: # ----------------------------------------------------------------- Course made
2673: my $topurl=$url;
2674: unless ($nonstandard) {
2675: # ------------------------------------------ For standard courses, make top url
2676: my $mapurl=&clutter($url);
2677: if ($mapurl eq '/res/') { $mapurl=''; }
2678: $ENV{'form.initmap'}=(<<ENDINITMAP);
2679: <map>
2680: <resource id="1" type="start"></resource>
2681: <resource id="2" src="$mapurl"></resource>
2682: <resource id="3" type="finish"></resource>
2683: <link index="1" from="1" to="2"></link>
2684: <link index="2" from="2" to="3"></link>
2685: </map>
2686: ENDINITMAP
2687: $topurl=&declutter(
2688: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2689: );
2690: }
2691: # ----------------------------------------------------------- Write preferences
2692: &writecoursepref($udom.'_'.$uname,
2693: ('description' => $description,
2694: 'url' => $topurl));
2695: return '/'.$udom.'/'.$uname;
2696: }
2697:
2698: # ---------------------------------------------------------- Assign Custom Role
2699:
2700: sub assigncustomrole {
2701: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2702: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2703: $end,$start);
2704: }
2705:
2706: # ----------------------------------------------------------------- Revoke Role
2707:
2708: sub revokerole {
2709: my ($udom,$uname,$url,$role)=@_;
2710: my $now=time;
2711: return &assignrole($udom,$uname,$url,$role,$now);
2712: }
2713:
2714: # ---------------------------------------------------------- Revoke Custom Role
2715:
2716: sub revokecustomrole {
2717: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2718: my $now=time;
2719: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2720: }
2721:
2722: # ------------------------------------------------------------ Directory lister
2723:
2724: sub dirlist {
2725: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2726:
2727: $uri=~s/^\///;
2728: $uri=~s/\/$//;
2729: my ($udom, $uname);
2730: (undef,$udom,$uname)=split(/\//,$uri);
2731: if(defined($userdomain)) {
2732: $udom = $userdomain;
2733: }
2734: if(defined($username)) {
2735: $uname = $username;
2736: }
2737:
2738: my $dirRoot = $perlvar{'lonDocRoot'};
2739: if(defined($alternateDirectoryRoot)) {
2740: $dirRoot = $alternateDirectoryRoot;
2741: $dirRoot =~ s/\/$//;
2742: }
2743:
2744: if($udom) {
2745: if($uname) {
2746: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2747: homeserver($uname,$udom));
2748: return split(/:/,$listing);
2749: } elsif(!defined($alternateDirectoryRoot)) {
2750: my $tryserver;
2751: my %allusers=();
2752: foreach $tryserver (keys %libserv) {
2753: if($hostdom{$tryserver} eq $udom) {
2754: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2755: $udom, $tryserver);
2756: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2757: && ($listing ne 'con_lost')) {
2758: foreach (split(/:/,$listing)) {
2759: my ($entry,@stat)=split(/&/,$_);
2760: $allusers{$entry}=1;
2761: }
2762: }
2763: }
2764: }
2765: my $alluserstr='';
2766: foreach (sort keys %allusers) {
2767: $alluserstr.=$_.'&user:';
2768: }
2769: $alluserstr=~s/:$//;
2770: return split(/:/,$alluserstr);
2771: } else {
2772: my @emptyResults = ();
2773: push(@emptyResults, 'missing user name');
2774: return split(':',@emptyResults);
2775: }
2776: } elsif(!defined($alternateDirectoryRoot)) {
2777: my $tryserver;
2778: my %alldom=();
2779: foreach $tryserver (keys %libserv) {
2780: $alldom{$hostdom{$tryserver}}=1;
2781: }
2782: my $alldomstr='';
2783: foreach (sort keys %alldom) {
2784: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2785: }
2786: $alldomstr=~s/:$//;
2787: return split(/:/,$alldomstr);
2788: } else {
2789: my @emptyResults = ();
2790: push(@emptyResults, 'missing domain');
2791: return split(':',@emptyResults);
2792: }
2793: }
2794:
2795: # --------------------------------------------- GetFileTimestamp
2796: # This function utilizes dirlist and returns the date stamp for
2797: # when it was last modified. It will also return an error of -1
2798: # if an error occurs
2799:
2800: sub GetFileTimestamp {
2801: my ($studentDomain,$studentName,$filename,$root)=@_;
2802: $studentDomain=~s/\W//g;
2803: $studentName=~s/\W//g;
2804: my $subdir=$studentName.'__';
2805: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
2806: my $proname="$studentDomain/$subdir/$studentName";
2807: $proname .= '/'.$filename;
2808: my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
2809: $root);
2810: my $fileStat = $dir[0];
2811: my @stats = split('&', $fileStat);
2812: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
2813: return $stats[9];
2814: } else {
2815: return -1;
2816: }
2817: }
2818:
2819: # -------------------------------------------------------- Value of a Condition
2820:
2821: sub directcondval {
2822: my $number=shift;
2823: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2824: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2825: } else {
2826: return 2;
2827: }
2828: }
2829:
2830: sub condval {
2831: my $condidx=shift;
2832: my $result=0;
2833: my $allpathcond='';
2834: foreach (split(/\|/,$condidx)) {
2835: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2836: $allpathcond.=
2837: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2838: }
2839: }
2840: $allpathcond=~s/\|$//;
2841: if ($ENV{'request.course.id'}) {
2842: if ($allpathcond) {
2843: my $operand='|';
2844: my @stack;
2845: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2846: if ($_ eq '(') {
2847: push @stack,($operand,$result)
2848: } elsif ($_ eq ')') {
2849: my $before=pop @stack;
2850: if (pop @stack eq '&') {
2851: $result=$result>$before?$before:$result;
2852: } else {
2853: $result=$result>$before?$result:$before;
2854: }
2855: } elsif (($_ eq '&') || ($_ eq '|')) {
2856: $operand=$_;
2857: } else {
2858: my $new=directcondval($_);
2859: if ($operand eq '&') {
2860: $result=$result>$new?$new:$result;
2861: } else {
2862: $result=$result>$new?$result:$new;
2863: }
2864: }
2865: }
2866: }
2867: }
2868: return $result;
2869: }
2870:
2871: # ---------------------------------------------------- Devalidate courseresdata
2872:
2873: sub devalidatecourseresdata {
2874: my ($coursenum,$coursedomain)=@_;
2875: my $hashid=$coursenum.':'.$coursedomain;
2876: delete $courseresdatacache{$hashid.'.time'};
2877: }
2878:
2879: # --------------------------------------------------- Course Resourcedata Query
2880:
2881: sub courseresdata {
2882: my ($coursenum,$coursedomain,@which)=@_;
2883: my $coursehom=&homeserver($coursenum,$coursedomain);
2884: my $hashid=$coursenum.':'.$coursedomain;
2885: my $dodump=0;
2886: if (!defined($courseresdatacache{$hashid.'.time'})) {
2887: $dodump=1;
2888: } else {
2889: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2890: }
2891: if ($dodump) {
2892: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2893: my ($tmp) = keys(%dumpreply);
2894: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2895: $courseresdatacache{$hashid.'.time'}=time;
2896: $courseresdatacache{$hashid}=\%dumpreply;
2897: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
2898: return $tmp;
2899: }
2900: }
2901: foreach my $item (@which) {
2902: if (defined($courseresdatacache{$hashid}->{$item})) {
2903: return $courseresdatacache{$hashid}->{$item};
2904: }
2905: }
2906: return undef;
2907: }
2908:
2909: # --------------------------------------------------------- Value of a Variable
2910:
2911: sub EXT {
2912: my ($varname,$symbparm,$udom,$uname,)=@_;
2913:
2914: unless ($varname) { return ''; }
2915: #get real user name/domain, courseid and symb
2916: my $courseid;
2917: if (!($uname && $udom)) {
2918: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2919: if (!$symbparm) { $symbparm=$cursymb; }
2920: } else {
2921: $courseid=$ENV{'request.course.id'};
2922: }
2923: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2924: my $rest;
2925: if (defined($therest[0])) {
2926: $rest=join('.',@therest);
2927: } else {
2928: $rest='';
2929: }
2930:
2931: my $qualifierrest=$qualifier;
2932: if ($rest) { $qualifierrest.='.'.$rest; }
2933: my $spacequalifierrest=$space;
2934: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2935: if ($realm eq 'user') {
2936: # --------------------------------------------------------------- user.resource
2937: if ($space eq 'resource') {
2938: if (defined($Apache::lonhomework::parsing_a_problem)) {
2939: return $Apache::lonhomework::history{$qualifierrest};
2940: } else {
2941: my %restored=&restore($symbparm,$courseid,$udom,$uname);
2942: return $restored{$qualifierrest};
2943: }
2944: # ----------------------------------------------------------------- user.access
2945: } elsif ($space eq 'access') {
2946: # FIXME - not supporting calls for a specific user
2947: return &allowed($qualifier,$rest);
2948: # ------------------------------------------ user.preferences, user.environment
2949: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2950: if (($uname eq $ENV{'user.name'}) &&
2951: ($udom eq $ENV{'user.domain'})) {
2952: return $ENV{join('.',('environment',$qualifierrest))};
2953: } else {
2954: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2955: return $returnhash{$qualifierrest};
2956: }
2957: # ----------------------------------------------------------------- user.course
2958: } elsif ($space eq 'course') {
2959: # FIXME - not supporting calls for a specific user
2960: return $ENV{join('.',('request.course',$qualifier))};
2961: # ------------------------------------------------------------------- user.role
2962: } elsif ($space eq 'role') {
2963: # FIXME - not supporting calls for a specific user
2964: my ($role,$where)=split(/\./,$ENV{'request.role'});
2965: if ($qualifier eq 'value') {
2966: return $role;
2967: } elsif ($qualifier eq 'extent') {
2968: return $where;
2969: }
2970: # ----------------------------------------------------------------- user.domain
2971: } elsif ($space eq 'domain') {
2972: return $udom;
2973: # ------------------------------------------------------------------- user.name
2974: } elsif ($space eq 'name') {
2975: return $uname;
2976: # ---------------------------------------------------- Any other user namespace
2977: } else {
2978: my %reply=&get($space,[$qualifierrest],$udom,$uname);
2979: return $reply{$qualifierrest};
2980: }
2981: } elsif ($realm eq 'query') {
2982: # ---------------------------------------------- pull stuff out of query string
2983: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
2984: return $ENV{'form.'.$space};
2985: } elsif ($realm eq 'request') {
2986: # ------------------------------------------------------------- request.browser
2987: if ($space eq 'browser') {
2988: return $ENV{'browser.'.$qualifier};
2989: # ------------------------------------------------------------ request.filename
2990: } else {
2991: return $ENV{'request.'.$spacequalifierrest};
2992: }
2993: } elsif ($realm eq 'course') {
2994: # ---------------------------------------------------------- course.description
2995: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
2996: } elsif ($realm eq 'resource') {
2997:
2998: if ($courseid eq $ENV{'request.course.id'}) {
2999:
3000: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3001:
3002: # ----------------------------------------------------- Cascading lookup scheme
3003: if (!$symbparm) { $symbparm=&symbread(); }
3004: my $symbp=$symbparm;
3005: my $mapp=(split(/\_\_\_/,$symbp))[0];
3006:
3007: my $symbparm=$symbp.'.'.$spacequalifierrest;
3008: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3009:
3010: my $section;
3011: if (($ENV{'user.name'} eq $uname) &&
3012: ($ENV{'user.domain'} eq $udom)) {
3013: $section=$ENV{'request.course.sec'};
3014: } else {
3015: $section=&usection($udom,$uname,$courseid);
3016: }
3017:
3018: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3019: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3020: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3021:
3022: my $courselevel=$courseid.'.'.$spacequalifierrest;
3023: my $courselevelr=$courseid.'.'.$symbparm;
3024: my $courselevelm=$courseid.'.'.$mapparm;
3025:
3026: # ----------------------------------------------------------- first, check user
3027: #most student don't have any data set, check if there is some data
3028: #every thirty minutes
3029: if (!
3030: (exists($ENV{'cache.studentresdata'})
3031: && (($ENV{'cache.studentresdata'}+1800) > time))) {
3032: my %resourcedata=&get('resourcedata',
3033: [$courselevelr,$courselevelm,$courselevel],
3034: $udom,$uname);
3035: my ($tmp)=keys(%resourcedata);
3036: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3037: if ($resourcedata{$courselevelr}) {
3038: return $resourcedata{$courselevelr}; }
3039: if ($resourcedata{$courselevelm}) {
3040: return $resourcedata{$courselevelm}; }
3041: if ($resourcedata{$courselevel}) {
3042: return $resourcedata{$courselevel}; }
3043: } else {
3044: if ($tmp!~/No such file/) {
3045: &logthis("<font color=blue>WARNING:".
3046: " Trying to get resource data for ".
3047: $uname." at ".$udom.": ".
3048: $tmp."</font>");
3049: } elsif ($tmp=~/error:No such file/) {
3050: $ENV{'cache.studentresdata'}=time;
3051: &appenv(('cache.studentresdata'=>
3052: $ENV{'cache.studentresdata'}));
3053: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3054: return $tmp;
3055: }
3056: }
3057: }
3058:
3059: # -------------------------------------------------------- second, check course
3060:
3061: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3062: $ENV{'course.'.$courseid.'.domain'},
3063: ($seclevelr,$seclevelm,$seclevel,
3064: $courselevelr,$courselevelm,
3065: $courselevel));
3066: if (defined($coursereply)) { return $coursereply; }
3067:
3068: # ------------------------------------------------------ third, check map parms
3069: my %parmhash=();
3070: my $thisparm='';
3071: if (tie(%parmhash,'GDBM_File',
3072: $ENV{'request.course.fn'}.'_parms.db',
3073: &GDBM_READER(),0640)) {
3074: $thisparm=$parmhash{$symbparm};
3075: untie(%parmhash);
3076: }
3077: if ($thisparm) { return $thisparm; }
3078: }
3079: # --------------------------------------------- last, look in resource metadata
3080:
3081: $spacequalifierrest=~s/\./\_/;
3082: my $filename;
3083: if (!$symbparm) { $symbparm=&symbread(); }
3084: if ($symbparm) {
3085: $filename=(split(/\_\_\_/,$symbparm))[2];
3086: } else {
3087: $filename=$ENV{'request.filename'};
3088: }
3089: my $metadata=&metadata($filename,$spacequalifierrest);
3090: if (defined($metadata)) { return $metadata; }
3091: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3092: if (defined($metadata)) { return $metadata; }
3093:
3094: # ------------------------------------------------------------------ Cascade up
3095: unless ($space eq '0') {
3096: my @parts=split(/_/,$space);
3097: my $id=pop(@parts);
3098: my $part=join('_',@parts);
3099: if ($part eq '') { $part='0'; }
3100: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3101: $symbparm,$udom,$uname);
3102: if (defined($partgeneral)) { return $partgeneral; }
3103: }
3104:
3105: # ---------------------------------------------------- Any other user namespace
3106: } elsif ($realm eq 'environment') {
3107: # ----------------------------------------------------------------- environment
3108: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3109: return $ENV{'environment.'.$spacequalifierrest};
3110: } else {
3111: my %returnhash=&userenvironment($udom,$uname,
3112: $spacequalifierrest);
3113: return $returnhash{$spacequalifierrest};
3114: }
3115: } elsif ($realm eq 'system') {
3116: # ----------------------------------------------------------------- system.time
3117: if ($space eq 'time') {
3118: return time;
3119: }
3120: }
3121: return '';
3122: }
3123:
3124: sub add_prefix_and_part {
3125: my ($prefix,$part)=@_;
3126: my $keyroot;
3127: if (defined($prefix) && $prefix !~ /^__/) {
3128: # prefix that has a part already
3129: $keyroot=$prefix;
3130: } elsif (defined($prefix)) {
3131: # prefix that is missing a part
3132: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3133: } else {
3134: # no prefix at all
3135: if (defined($part)) { $keyroot='_'.$part; }
3136: }
3137: return $keyroot;
3138: }
3139:
3140: # ---------------------------------------------------------------- Get metadata
3141:
3142: sub metadata {
3143: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3144:
3145: $uri=&declutter($uri);
3146: # if it is a non metadata possible uri return quickly
3147: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3148: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
3149: return '';
3150: }
3151: my $filename=$uri;
3152: $uri=~s/\.meta$//;
3153: #
3154: # Is the metadata already cached?
3155: # Look at timestamp of caching
3156: # Everything is cached by the main uri, libraries are never directly cached
3157: #
3158: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3159: #
3160: # Is this a recursive call for a library?
3161: #
3162: if ($liburi) {
3163: $liburi=&declutter($liburi);
3164: $filename=$liburi;
3165: }
3166: my %metathesekeys=();
3167: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3168: my $metastring=&getfile(&filelocation('',&clutter($filename)));
3169: my $parser=HTML::LCParser->new(\$metastring);
3170: my $token;
3171: undef %metathesekeys;
3172: while ($token=$parser->get_token) {
3173: if ($token->[0] eq 'S') {
3174: if (defined($token->[2]->{'package'})) {
3175: #
3176: # This is a package - get package info
3177: #
3178: my $package=$token->[2]->{'package'};
3179: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3180: if (defined($token->[2]->{'id'})) {
3181: $keyroot.='_'.$token->[2]->{'id'};
3182: }
3183: if ($metacache{$uri.':packages'}) {
3184: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3185: } else {
3186: $metacache{$uri.':packages'}=$package.$keyroot;
3187: }
3188: foreach (keys %packagetab) {
3189: if ($_=~/^$package\&/) {
3190: my ($pack,$name,$subp)=split(/\&/,$_);
3191: my $value=$packagetab{$_};
3192: my $part=$keyroot;
3193: $part=~s/^\_//;
3194: if ($subp eq 'display') {
3195: $value.=' [Part: '.$part.']';
3196: }
3197: my $unikey='parameter'.$keyroot.'_'.$name;
3198: if ($subp eq 'default') { $unikey='parameter_0_'.$name; }
3199: $metathesekeys{$unikey}=1;
3200: $metacache{$uri.':'.$unikey.'.part'}=$part;
3201: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3202: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3203: }
3204: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3205: $metacache{$uri.':'.$unikey}=
3206: $metacache{$uri.':'.$unikey.'.default'}
3207: }
3208: }
3209: }
3210: } else {
3211: #
3212: # This is not a package - some other kind of start tag
3213: #
3214: my $entry=$token->[1];
3215: my $unikey;
3216: if ($entry eq 'import') {
3217: $unikey='';
3218: } else {
3219: $unikey=$entry;
3220: }
3221: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3222:
3223: if (defined($token->[2]->{'id'})) {
3224: $unikey.='_'.$token->[2]->{'id'};
3225: }
3226:
3227: if ($entry eq 'import') {
3228: #
3229: # Importing a library here
3230: #
3231: if ($depthcount<20) {
3232: my $location=$parser->get_text('/import');
3233: my $dir=$filename;
3234: $dir=~s|[^/]*$||;
3235: $location=&filelocation($dir,$location);
3236: foreach (sort(split(/\,/,&metadata($uri,'keys',
3237: $location,$unikey,
3238: $depthcount+1)))) {
3239: $metathesekeys{$_}=1;
3240: }
3241: }
3242: } else {
3243:
3244: if (defined($token->[2]->{'name'})) {
3245: $unikey.='_'.$token->[2]->{'name'};
3246: }
3247: $metathesekeys{$unikey}=1;
3248: foreach (@{$token->[3]}) {
3249: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3250: }
3251: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3252: my $default=$metacache{$uri.':'.$unikey.'.default'};
3253: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3254: # only ws inside the tag, and not in default, so use default
3255: # as value
3256: $metacache{$uri.':'.$unikey}=$default;
3257: } else {
3258: # either something interesting inside the tag or default
3259: # uninteresting
3260: $metacache{$uri.':'.$unikey}=$internaltext;
3261: }
3262: # end of not-a-package not-a-library import
3263: }
3264: # end of not-a-package start tag
3265: }
3266: # the next is the end of "start tag"
3267: }
3268: }
3269: # are there custom rights to evaluate
3270: if ($metacache{$uri.':copyright'} eq 'custom') {
3271:
3272: #
3273: # Importing a rights file here
3274: #
3275: unless ($depthcount) {
3276: my $location=$metacache{$uri.':customdistributionfile'};
3277: my $dir=$filename;
3278: $dir=~s|[^/]*$||;
3279: $location=&filelocation($dir,$location);
3280: foreach (sort(split(/\,/,&metadata($uri,'keys',
3281: $location,'_rights',
3282: $depthcount+1)))) {
3283: $metathesekeys{$_}=1;
3284: }
3285: }
3286: }
3287: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3288: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3289: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3290: $metacache{$uri.':cachedtimestamp'}=time;
3291: # this is the end of "was not already recently cached
3292: }
3293: return $metacache{$uri.':'.$what};
3294: }
3295:
3296: sub metadata_generate_part0 {
3297: my ($metadata,$metacache,$uri) = @_;
3298: my %allnames;
3299: foreach my $metakey (sort keys %$metadata) {
3300: if ($metakey=~/^parameter\_(.*)/) {
3301: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3302: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3303: if (! exists($$metadata{'parameter_0_'.$name})) {
3304: $allnames{$name}=$part;
3305: }
3306: }
3307: }
3308: foreach my $name (keys(%allnames)) {
3309: $$metadata{"parameter_0_$name"}=1;
3310: my $key="$uri:parameter_0_$name";
3311: $$metacache{"$key.part"}='0';
3312: $$metacache{"$key.name"}=$name;
3313: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3314: $allnames{$name}.'_'.$name.
3315: '.type'};
3316: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3317: '.display'};
3318: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3319: $olddis=~s/$expr/\[Part: 0\]/;
3320: $$metacache{"$key.display"}=$olddis;
3321: }
3322: }
3323:
3324: # ------------------------------------------------- Get the title of a resource
3325:
3326: sub gettitle {
3327: my $urlsymb=shift;
3328: my $symb=&symbread($urlsymb);
3329: unless ($symb) {
3330: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3331: return &metadata($urlsymb,'title');
3332: }
3333: if ($titlecache{$symb}) { return $titlecache{$symb}; }
3334: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3335: my $title='';
3336: my %bighash;
3337: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3338: &GDBM_READER(),0640)) {
3339: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3340: $title=$bighash{'title_'.$mapid.'.'.$resid};
3341: untie %bighash;
3342: }
3343: if ($title) {
3344: $titlecache{$symb}=$title;
3345: return $title;
3346: } else {
3347: return &metadata($urlsymb,'title');
3348: }
3349: }
3350:
3351: # ------------------------------------------------- Update symbolic store links
3352:
3353: sub symblist {
3354: my ($mapname,%newhash)=@_;
3355: $mapname=declutter($mapname);
3356: my %hash;
3357: if (($ENV{'request.course.fn'}) && (%newhash)) {
3358: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3359: &GDBM_WRCREAT(),0640)) {
3360: foreach (keys %newhash) {
3361: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3362: }
3363: if (untie(%hash)) {
3364: return 'ok';
3365: }
3366: }
3367: }
3368: return 'error';
3369: }
3370:
3371: # --------------------------------------------------------------- Verify a symb
3372:
3373: sub symbverify {
3374: my ($symb,$thisfn)=@_;
3375: $thisfn=&declutter($thisfn);
3376: # direct jump to resource in page or to a sequence - will construct own symbs
3377: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3378: # check URL part
3379: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3380: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3381:
3382: $symb=&symbclean($symb);
3383:
3384: my %bighash;
3385: my $okay=0;
3386: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3387: &GDBM_READER(),0640)) {
3388: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3389: unless ($ids) {
3390: $ids=$bighash{'ids_/'.$thisfn};
3391: }
3392: if ($ids) {
3393: # ------------------------------------------------------------------- Has ID(s)
3394: foreach (split(/\,/,$ids)) {
3395: my ($mapid,$resid)=split(/\./,$_);
3396: if (
3397: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3398: eq $symb) {
3399: $okay=1;
3400: }
3401: }
3402: }
3403: untie(%bighash);
3404: }
3405: return $okay;
3406: }
3407:
3408: # --------------------------------------------------------------- Clean-up symb
3409:
3410: sub symbclean {
3411: my $symb=shift;
3412:
3413: # remove version from map
3414: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3415:
3416: # remove version from URL
3417: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3418:
3419: return $symb;
3420: }
3421:
3422: # ------------------------------------------------------ Return symb list entry
3423:
3424: sub symbread {
3425: my ($thisfn,$donotrecurse)=@_;
3426: # no filename provided? try from environment
3427: unless ($thisfn) {
3428: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3429: $thisfn=$ENV{'request.filename'};
3430: }
3431: # is that filename actually a symb? Verify, clean, and return
3432: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3433: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3434: }
3435: $thisfn=declutter($thisfn);
3436: my %hash;
3437: my %bighash;
3438: my $syval='';
3439: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3440: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3441: &GDBM_READER(),0640)) {
3442: $syval=$hash{$thisfn};
3443: untie(%hash);
3444: }
3445: # ---------------------------------------------------------- There was an entry
3446: if ($syval) {
3447: unless ($syval=~/\_\d+$/) {
3448: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3449: &appenv('request.ambiguous' => $thisfn);
3450: return '';
3451: }
3452: $syval.=$1;
3453: }
3454: } else {
3455: # ------------------------------------------------------- Was not in symb table
3456: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3457: &GDBM_READER(),0640)) {
3458: # ---------------------------------------------- Get ID(s) for current resource
3459: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3460: unless ($ids) {
3461: $ids=$bighash{'ids_/'.$thisfn};
3462: }
3463: unless ($ids) {
3464: # alias?
3465: $ids=$bighash{'mapalias_'.$thisfn};
3466: }
3467: if ($ids) {
3468: # ------------------------------------------------------------------- Has ID(s)
3469: my @possibilities=split(/\,/,$ids);
3470: if ($#possibilities==0) {
3471: # ----------------------------------------------- There is only one possibility
3472: my ($mapid,$resid)=split(/\./,$ids);
3473: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3474: } elsif (!$donotrecurse) {
3475: # ------------------------------------------ There is more than one possibility
3476: my $realpossible=0;
3477: foreach (@possibilities) {
3478: my $file=$bighash{'src_'.$_};
3479: if (&allowed('bre',$file)) {
3480: my ($mapid,$resid)=split(/\./,$_);
3481: if ($bighash{'map_type_'.$mapid} ne 'page') {
3482: $realpossible++;
3483: $syval=declutter($bighash{'map_id_'.$mapid}).
3484: '___'.$resid;
3485: }
3486: }
3487: }
3488: if ($realpossible!=1) { $syval=''; }
3489: } else {
3490: $syval='';
3491: }
3492: }
3493: untie(%bighash)
3494: }
3495: }
3496: if ($syval) {
3497: return &symbclean($syval.'___'.$thisfn);
3498: }
3499: }
3500: &appenv('request.ambiguous' => $thisfn);
3501: return '';
3502: }
3503:
3504: # ---------------------------------------------------------- Return random seed
3505:
3506: sub numval {
3507: my $txt=shift;
3508: $txt=~tr/A-J/0-9/;
3509: $txt=~tr/a-j/0-9/;
3510: $txt=~tr/K-T/0-9/;
3511: $txt=~tr/k-t/0-9/;
3512: $txt=~tr/U-Z/0-5/;
3513: $txt=~tr/u-z/0-5/;
3514: $txt=~s/\D//g;
3515: return int($txt);
3516: }
3517:
3518: sub rndseed {
3519: my ($symb,$courseid,$domain,$username)=@_;
3520: if (!$symb) {
3521: unless ($symb=&symbread()) { return time; }
3522: }
3523: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3524: if (!$domain) {$domain=$ENV{'user.domain'};}
3525: if (!$username) {$username=$ENV{'user.name'};}
3526: {
3527: use integer;
3528: my $symbchck=unpack("%32C*",$symb) << 27;
3529: my $symbseed=numval($symb) << 22;
3530: my $namechck=unpack("%32C*",$username) << 17;
3531: my $nameseed=numval($username) << 12;
3532: my $domainseed=unpack("%32C*",$domain) << 7;
3533: my $courseseed=unpack("%32C*",$courseid);
3534: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3535: #uncommenting these lines can break things!
3536: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3537: #&Apache::lonxml::debug("rndseed :$num:$symb");
3538: return $num;
3539: }
3540: }
3541:
3542: sub ireceipt {
3543: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3544: my $cuname=unpack("%32C*",$funame);
3545: my $cudom=unpack("%32C*",$fudom);
3546: my $cucourseid=unpack("%32C*",$fucourseid);
3547: my $cusymb=unpack("%32C*",$fusymb);
3548: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3549: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3550: ($cunique%$cuname+
3551: $cunique%$cudom+
3552: $cusymb%$cuname+
3553: $cusymb%$cudom+
3554: $cucourseid%$cuname+
3555: $cucourseid%$cudom);
3556: }
3557:
3558: sub receipt {
3559: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3560: return &ireceipt($name,$domain,$courseid,$symb);
3561: }
3562:
3563: # ------------------------------------------------------------ Serves up a file
3564: # returns either the contents of the file or a -1
3565: sub getfile {
3566: my $file=shift;
3567: if ($file=~/^\/*uploaded\//) { # user file
3568: my $ua=new LWP::UserAgent;
3569: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3570: my $response=$ua->request($request);
3571: if ($response->is_success()) {
3572: return $response->content;
3573: } else {
3574: return -1;
3575: }
3576: } else { # normal file from res space
3577: &repcopy($file);
3578: if (! -e $file ) { return -1; };
3579: my $fh=Apache::File->new($file);
3580: my $a='';
3581: while (<$fh>) { $a .=$_; }
3582: return $a;
3583: }
3584: }
3585:
3586: sub filelocation {
3587: my ($dir,$file) = @_;
3588: my $location;
3589: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3590: if ($file=~m:^/~:) { # is a contruction space reference
3591: $location = $file;
3592: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3593: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3594: $location=$file;
3595: } else {
3596: $file=~s/^$perlvar{'lonDocRoot'}//;
3597: $file=~s:^/*res::;
3598: if ( !( $file =~ m:^/:) ) {
3599: $location = $dir. '/'.$file;
3600: } else {
3601: $location = '/home/httpd/html/res'.$file;
3602: }
3603: }
3604: $location=~s://+:/:g; # remove duplicate /
3605: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3606: return $location;
3607: }
3608:
3609: sub hreflocation {
3610: my ($dir,$file)=@_;
3611: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3612: my $finalpath=filelocation($dir,$file);
3613: $finalpath=~s/^\/home\/httpd\/html//;
3614: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3615: return $finalpath;
3616: } else {
3617: return $file;
3618: }
3619: }
3620:
3621: # ------------------------------------------------------------- Declutters URLs
3622:
3623: sub declutter {
3624: my $thisfn=shift;
3625: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3626: $thisfn=~s/^\///;
3627: $thisfn=~s/^res\///;
3628: $thisfn=~s/\?.+$//;
3629: return $thisfn;
3630: }
3631:
3632: # ------------------------------------------------------------- Clutter up URLs
3633:
3634: sub clutter {
3635: my $thisfn='/'.&declutter(shift);
3636: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3637: $thisfn='/res'.$thisfn;
3638: }
3639: return $thisfn;
3640: }
3641:
3642: # -------------------------------------------------------- Escape Special Chars
3643:
3644: sub escape {
3645: my $str=shift;
3646: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3647: return $str;
3648: }
3649:
3650: # ----------------------------------------------------- Un-Escape Special Chars
3651:
3652: sub unescape {
3653: my $str=shift;
3654: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3655: return $str;
3656: }
3657:
3658: # ================================================================ Main Program
3659:
3660: sub goodbye {
3661: &logthis("Starting Shut down");
3662: &flushcourselogs();
3663: &logthis("Shutting down");
3664: }
3665:
3666: BEGIN {
3667: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3668: unless ($readit) {
3669: {
3670: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3671:
3672: while (my $configline=<$config>) {
3673: if ($configline =~ /^[^\#]*PerlSetVar/) {
3674: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3675: chomp($varvalue);
3676: $perlvar{$varname}=$varvalue;
3677: }
3678: }
3679: }
3680: {
3681: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3682:
3683: while (my $configline=<$config>) {
3684: if ($configline =~ /^[^\#]*PerlSetVar/) {
3685: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3686: chomp($varvalue);
3687: $perlvar{$varname}=$varvalue;
3688: }
3689: }
3690: }
3691:
3692: # ------------------------------------------------------------ Read domain file
3693: {
3694: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
3695: '/domain.tab');
3696: %domaindescription = ();
3697: %domain_auth_def = ();
3698: %domain_auth_arg_def = ();
3699: if ($fh) {
3700: while (<$fh>) {
3701: next if /^\#/;
3702: chomp;
3703: my ($domain, $domain_description, $def_auth, $def_auth_arg)
3704: = split(/:/,$_,4);
3705: $domain_auth_def{$domain}=$def_auth;
3706: $domain_auth_arg_def{$domain}=$def_auth_arg;
3707: $domaindescription{$domain}=$domain_description;
3708: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
3709: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
3710: }
3711: }
3712: }
3713:
3714:
3715: # ------------------------------------------------------------- Read hosts file
3716: {
3717: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3718:
3719: while (my $configline=<$config>) {
3720: next if ($configline =~ /^(\#|\s*$)/);
3721: chomp($configline);
3722: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3723: if ($id && $domain && $role && $name && $ip) {
3724: $hostname{$id}=$name;
3725: $hostdom{$id}=$domain;
3726: $hostip{$id}=$ip;
3727: $iphost{$ip}=$id;
3728: if ($role eq 'library') { $libserv{$id}=$name; }
3729: } else {
3730: if ($configline) {
3731: &logthis("Skipping hosts.tab line -$configline-");
3732: }
3733: }
3734: }
3735: }
3736:
3737: # ------------------------------------------------------ Read spare server file
3738: {
3739: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3740:
3741: while (my $configline=<$config>) {
3742: chomp($configline);
3743: if ($configline) {
3744: $spareid{$configline}=1;
3745: }
3746: }
3747: }
3748: # ------------------------------------------------------------ Read permissions
3749: {
3750: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3751:
3752: while (my $configline=<$config>) {
3753: chomp($configline);
3754: if ($configline) {
3755: my ($role,$perm)=split(/ /,$configline);
3756: if ($perm ne '') { $pr{$role}=$perm; }
3757: }
3758: }
3759: }
3760:
3761: # -------------------------------------------- Read plain texts for permissions
3762: {
3763: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3764:
3765: while (my $configline=<$config>) {
3766: chomp($configline);
3767: if ($configline) {
3768: my ($short,$plain)=split(/:/,$configline);
3769: if ($plain ne '') { $prp{$short}=$plain; }
3770: }
3771: }
3772: }
3773:
3774: # ---------------------------------------------------------- Read package table
3775: {
3776: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3777:
3778: while (my $configline=<$config>) {
3779: chomp($configline);
3780: my ($short,$plain)=split(/:/,$configline);
3781: my ($pack,$name)=split(/\&/,$short);
3782: if ($plain ne '') {
3783: $packagetab{$pack.'&'.$name.'&name'}=$name;
3784: $packagetab{$short}=$plain;
3785: }
3786: }
3787: }
3788:
3789: # ------------- set up temporary directory
3790: {
3791: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
3792:
3793: }
3794:
3795: %metacache=();
3796:
3797: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
3798: $dumpcount=0;
3799:
3800: &logtouch();
3801: &logthis('<font color=yellow>INFO: Read configuration</font>');
3802: $readit=1;
3803: }
3804: }
3805:
3806: 1;
3807: __END__
3808:
3809: =pod
3810:
3811: =head1 NAME
3812:
3813: Apache::lonnet - Subroutines to ask questions about things in the network.
3814:
3815: =head1 SYNOPSIS
3816:
3817: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3818:
3819: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3820:
3821: Common parameters:
3822:
3823: =over 4
3824:
3825: =item *
3826:
3827: $uname : an internal username (if $cname expecting a course Id specifically)
3828:
3829: =item *
3830:
3831: $udom : a domain (if $cdom expecting a course's domain specifically)
3832:
3833: =item *
3834:
3835: $symb : a resource instance identifier
3836:
3837: =item *
3838:
3839: $namespace : the name of a .db file that contains the data needed or
3840: being set.
3841:
3842: =back
3843:
3844: =head1 INTRODUCTION
3845:
3846: This module provides subroutines which interact with the
3847: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3848: - classes
3849: - users
3850: - resources
3851:
3852: For many of these objects you can also use this to store data about
3853: them or modify them in various ways.
3854:
3855: This is part of the LearningOnline Network with CAPA project
3856: described at http://www.lon-capa.org.
3857:
3858: =head1 RETURN MESSAGES
3859:
3860: =over 4
3861:
3862: =item *
3863:
3864: con_lost : unable to contact remote host
3865:
3866: =item *
3867:
3868: con_delayed : unable to contact remote host, message will be delivered
3869: when the connection is brought back up
3870:
3871: =item *
3872:
3873: con_failed : unable to contact remote host and unable to save message
3874: for later delivery
3875:
3876: =item *
3877:
3878: error: : an error a occured, a description of the error follows the :
3879:
3880: =item *
3881:
3882: no_such_host : unable to fund a host associated with the user/domain
3883: that was requested
3884:
3885: =back
3886:
3887: =head1 PUBLIC SUBROUTINES
3888:
3889: =head2 Session Environment Functions
3890:
3891: =over 4
3892:
3893: =item *
3894:
3895: appenv(%hash) : the value of %hash is written to the user envirnoment
3896: file, and will be restored for each access this user makes during this
3897: session, also modifies the %ENV for the current process
3898:
3899: =item *
3900:
3901: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3902:
3903: =back
3904:
3905: =head2 User Information
3906:
3907: =over 4
3908:
3909: =item *
3910:
3911: queryauthenticate($uname,$udom) : try to determine user's current
3912: authentication scheme
3913:
3914: =item *
3915:
3916: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3917: servers (first use the current one), $upass should be the users password
3918:
3919: =item *
3920:
3921: homeserver($uname,$udom) : find the server which has the user's
3922: directory and files (there must be only one), this caches the answer,
3923: and also caches if there is a borken connection.
3924:
3925: =item *
3926:
3927: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3928: unique resource in a domain, there must be only 1 ID per username, and
3929: only 1 username per ID in a specific domain) (returns hash:
3930: id=>name,id=>name)
3931:
3932: =item *
3933:
3934: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3935: name=>id,name=>id)
3936:
3937: =item *
3938:
3939: idput($udom,%ids) : store away a list of names and associated IDs
3940:
3941: =item *
3942:
3943: rolesinit($udom,$username,$authhost) : get user privileges
3944:
3945: =item *
3946:
3947: usection($udom,$uname,$cname) : finds the section of student in the
3948: course $cname, return section name/number or '' for "not in course"
3949: and '-1' for "no section"
3950:
3951: =item *
3952:
3953: userenvironment($udom,$uname,@what) : gets the values of the keys
3954: passed in @what from the requested user's environment, returns a hash
3955:
3956: =back
3957:
3958: =head2 User Roles
3959:
3960: =over 4
3961:
3962: =item *
3963:
3964: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
3965: actions
3966: F: full access
3967: U,I,K: authentication modes (cxx only)
3968: '': forbidden
3969: 1: user needs to choose course
3970: 2: browse allowed
3971:
3972: =item *
3973:
3974: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
3975: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
3976: and course level
3977:
3978: =item *
3979:
3980: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
3981: explanation of a user role term
3982:
3983: =back
3984:
3985: =head2 User Modification
3986:
3987: =over 4
3988:
3989: =item *
3990:
3991: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
3992: user for the level given by URL. Optional start and end dates (leave empty
3993: string or zero for "no date")
3994:
3995: =item *
3996:
3997: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
3998: change a users, password, possible return values are: ok,
3999: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4000: refused
4001:
4002: =item *
4003:
4004: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
4005:
4006: =item *
4007:
4008: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4009: modify user
4010:
4011: =item *
4012:
4013: modifystudent
4014:
4015: modify a students enrollment and identification information.
4016: The course id is resolved based on the current users environment.
4017: This means the envoking user must be a course coordinator or otherwise
4018: associated with a course.
4019:
4020: This call is essentially a wrapper for lonnet::modifyuser and
4021: lonnet::modify_student_enrollment
4022:
4023: Inputs:
4024:
4025: =over 4
4026:
4027: =item B<$udom> Students loncapa domain
4028:
4029: =item B<$uname> Students loncapa login name
4030:
4031: =item B<$uid> Students id/student number
4032:
4033: =item B<$umode> Students authentication mode
4034:
4035: =item B<$upass> Students password
4036:
4037: =item B<$first> Students first name
4038:
4039: =item B<$middle> Students middle name
4040:
4041: =item B<$last> Students last name
4042:
4043: =item B<$gene> Students generation
4044:
4045: =item B<$usec> Students section in course
4046:
4047: =item B<$end> Unix time of the roles expiration
4048:
4049: =item B<$start> Unix time of the roles start date
4050:
4051: =item B<$forceid> If defined, allow $uid to be changed
4052:
4053: =item B<$desiredhome> server to use as home server for student
4054:
4055: =back
4056:
4057: =item *
4058:
4059: modify_student_enrollment
4060:
4061: Change a students enrollment status in a class. The environment variable
4062: 'role.request.course' must be defined for this function to proceed.
4063:
4064: Inputs:
4065:
4066: =over 4
4067:
4068: =item $udom, students domain
4069:
4070: =item $uname, students name
4071:
4072: =item $uid, students user id
4073:
4074: =item $first, students first name
4075:
4076: =item $middle
4077:
4078: =item $last
4079:
4080: =item $gene
4081:
4082: =item $usec
4083:
4084: =item $end
4085:
4086: =item $start
4087:
4088: =back
4089:
4090:
4091: =item *
4092:
4093: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4094: custom role; give a custom role to a user for the level given by URL. Specify
4095: name and domain of role author, and role name
4096:
4097: =item *
4098:
4099: revokerole($udom,$uname,$url,$role) : revoke a role for url
4100:
4101: =item *
4102:
4103: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4104:
4105: =back
4106:
4107: =head2 Course Infomation
4108:
4109: =over 4
4110:
4111: =item *
4112:
4113: coursedescription($courseid) : course description
4114:
4115: =item *
4116:
4117: courseresdata($coursenum,$coursedomain,@which) : request for current
4118: parameter setting for a specific course, @what should be a list of
4119: parameters to ask about. This routine caches answers for 5 minutes.
4120:
4121: =back
4122:
4123: =head2 Course Modification
4124:
4125: =over 4
4126:
4127: =item *
4128:
4129: writecoursepref($courseid,%prefs) : write preferences (environment
4130: database) for a course
4131:
4132: =item *
4133:
4134: createcourse($udom,$description,$url) : make/modify course
4135:
4136: =back
4137:
4138: =head2 Resource Subroutines
4139:
4140: =over 4
4141:
4142: =item *
4143:
4144: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
4145:
4146: =item *
4147:
4148: repcopy($filename) : subscribes to the requested file, and attempts to
4149: replicate from the owning library server, Might return
4150: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4151: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4152: resource. Expects the local filesystem pathname
4153: (/home/httpd/html/res/....)
4154:
4155: =back
4156:
4157: =head2 Resource Information
4158:
4159: =over 4
4160:
4161: =item *
4162:
4163: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4164: a vairety of different possible values, $varname should be a request
4165: string, and the other parameters can be used to specify who and what
4166: one is asking about.
4167:
4168: Possible values for $varname are environment.lastname (or other item
4169: from the envirnment hash), user.name (or someother aspect about the
4170: user), resource.0.maxtries (or some other part and parameter of a
4171: resource)
4172:
4173: =item *
4174:
4175: directcondval($number) : get current value of a condition; reads from a state
4176: string
4177:
4178: =item *
4179:
4180: condval($condidx) : value of condition index based on state
4181:
4182: =item *
4183:
4184: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4185: resource's metadata, $what should be either a specific key, or either
4186: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4187: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4188:
4189: this function automatically caches all requests
4190:
4191: =item *
4192:
4193: metadata_query($query,$custom,$customshow) : make a metadata query against the
4194: network of library servers; returns file handle of where SQL and regex results
4195: will be stored for query
4196:
4197: =item *
4198:
4199: symbread($filename) : return symbolic list entry (filename argument optional);
4200: returns the data handle
4201:
4202: =item *
4203:
4204: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4205: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4206: failure, user must be in a course, as it assumes the existance of the
4207: course initi hash, and uses $ENV('request.course.id'}
4208:
4209:
4210: =item *
4211:
4212: symbclean($symb) : removes versions numbers from a symb, returns the
4213: cleaned symb
4214:
4215: =item *
4216:
4217: is_on_map($uri) : checks if the $uri is somewhere on the current
4218: course map, user must be in a course for it to work.
4219:
4220: =item *
4221:
4222: numval($salt) : return random seed value (addend for rndseed)
4223:
4224: =item *
4225:
4226: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4227: a random seed, all arguments are optional, if they aren't sent it uses the
4228: environment to derive them. Note: if symb isn't sent and it can't get one
4229: from &symbread it will use the current time as its return value
4230:
4231: =item *
4232:
4233: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4234: unfakeable, receipt
4235:
4236: =item *
4237:
4238: receipt() : API to ireceipt working off of ENV values; given out to users
4239:
4240: =item *
4241:
4242: countacc($url) : count the number of accesses to a given URL
4243:
4244: =item *
4245:
4246: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4247:
4248: =item *
4249:
4250: checkin($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 $tcrsid)
4251:
4252: =item *
4253:
4254: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4255:
4256: =item *
4257:
4258: devalidate($symb) : devalidate temporary spreadsheet calculations,
4259: forcing spreadsheet to reevaluate the resource scores next time.
4260:
4261: =back
4262:
4263: =head2 Storing/Retreiving Data
4264:
4265: =over 4
4266:
4267: =item *
4268:
4269: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4270: for this url; hashref needs to be given and should be a \%hashname; the
4271: remaining args aren't required and if they aren't passed or are '' they will
4272: be derived from the ENV
4273:
4274: =item *
4275:
4276: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4277: uses critical subroutine
4278:
4279: =item *
4280:
4281: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4282: all args are optional
4283:
4284: =item *
4285:
4286: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4287: works very similar to store/cstore, but all data is stored in a
4288: temporary location and can be reset using tmpreset, $storehash should
4289: be a hash reference, returns nothing on success
4290:
4291: =item *
4292:
4293: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4294: similar to restore, but all data is stored in a temporary location and
4295: can be reset using tmpreset. Returns a hash of values on success,
4296: error string otherwise.
4297:
4298: =item *
4299:
4300: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4301: deltes all keys for $symb form the temporary storage hash.
4302:
4303: =item *
4304:
4305: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4306: reference filled in from namesp ($udom and $uname are optional)
4307:
4308: =item *
4309:
4310: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4311: namesp ($udom and $uname are optional)
4312:
4313: =item *
4314:
4315: dump($namespace,$udom,$uname,$regexp) :
4316: dumps the complete (or key matching regexp) namespace into a hash
4317: ($udom, $uname and $regexp are optional)
4318:
4319: =item *
4320:
4321: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4322: ($udom and $uname are optional)
4323:
4324: =item *
4325:
4326: cput($namespace,$storehash,$udom,$uname) : critical put
4327: ($udom and $uname are optional)
4328:
4329: =item *
4330:
4331: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4332: reference filled in from namesp (encrypts the return communication)
4333: ($udom and $uname are optional)
4334:
4335: =item *
4336:
4337: log($udom,$name,$home,$message) : write to permanent log for user; use
4338: critical subroutine
4339:
4340: =back
4341:
4342: =head2 Network Status Functions
4343:
4344: =over 4
4345:
4346: =item *
4347:
4348: dirlist($uri) : return directory list based on URI
4349:
4350: =item *
4351:
4352: spareserver() : find server with least workload from spare.tab
4353:
4354: =back
4355:
4356: =head2 Apache Request
4357:
4358: =over 4
4359:
4360: =item *
4361:
4362: ssi($url,%hash) : server side include, does a complete request cycle on url to
4363: localhost, posts hash
4364:
4365: =back
4366:
4367: =head2 Data to String to Data
4368:
4369: =over 4
4370:
4371: =item *
4372:
4373: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4374: and '&' separators, supports elements that are arrayrefs and hashrefs
4375:
4376: =item *
4377:
4378: hashref2str($hashref) : convert a hashref into a string complete with
4379: escaping and '=' and '&' separators, supports elements that are
4380: arrayrefs and hashrefs
4381:
4382: =item *
4383:
4384: arrayref2str($arrayref) : convert an arrayref into a string complete
4385: with escaping and '&' separators, supports elements that are arrayrefs
4386: and hashrefs
4387:
4388: =item *
4389:
4390: str2hash($string) : convert string to hash using unescaping and
4391: splitting on '=' and '&', supports elements that are arrayrefs and
4392: hashrefs
4393:
4394: =item *
4395:
4396: str2array($string) : convert string to hash using unescaping and
4397: splitting on '&', supports elements that are arrayrefs and hashrefs
4398:
4399: =back
4400:
4401: =head2 Logging Routines
4402:
4403: =over 4
4404:
4405: These routines allow one to make log messages in the lonnet.log and
4406: lonnet.perm logfiles.
4407:
4408: =item *
4409:
4410: logtouch() : make sure the logfile, lonnet.log, exists
4411:
4412: =item *
4413:
4414: logthis() : append message to the normal lonnet.log file, it gets
4415: preiodically rolled over and deleted.
4416:
4417: =item *
4418:
4419: logperm() : append a permanent message to lonnet.perm.log, this log
4420: file never gets deleted by any automated portion of the system, only
4421: messages of critical importance should go in here.
4422:
4423: =back
4424:
4425: =head2 General File Helper Routines
4426:
4427: =over 4
4428:
4429: =item *
4430:
4431: getfile($file) : returns the entire contents of a file or -1; it
4432: properly subscribes to and replicates the file if neccessary.
4433:
4434: =item *
4435:
4436: filelocation($dir,$file) : returns file system location of a file
4437: based on URI; meant to be "fairly clean" absolute reference, $dir is a
4438: directory that relative $file lookups are to looked in ($dir of /a/dir
4439: and a file of ../bob will become /a/bob)
4440:
4441: =item *
4442:
4443: hreflocation($dir,$file) : returns file system location or a URL; same as
4444: filelocation except for hrefs
4445:
4446: =item *
4447:
4448: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
4449:
4450: =back
4451:
4452: =head2 HTTP Helper Routines
4453:
4454: =over 4
4455:
4456: =item *
4457:
4458: escape() : unpack non-word characters into CGI-compatible hex codes
4459:
4460: =item *
4461:
4462: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
4463:
4464: =back
4465:
4466: =head1 PRIVATE SUBROUTINES
4467:
4468: =head2 Underlying communication routines (Shouldn't call)
4469:
4470: =over 4
4471:
4472: =item *
4473:
4474: subreply() : tries to pass a message to lonc, returns con_lost if incapable
4475:
4476: =item *
4477:
4478: reply() : uses subreply to send a message to remote machine, logs all failures
4479:
4480: =item *
4481:
4482: critical() : passes a critical message to another server; if cannot
4483: get through then place message in connection buffer directory and
4484: returns con_delayed, if incapable of saving message, returns
4485: con_failed
4486:
4487: =item *
4488:
4489: reconlonc() : tries to reconnect lonc client processes.
4490:
4491: =back
4492:
4493: =head2 Resource Access Logging
4494:
4495: =over 4
4496:
4497: =item *
4498:
4499: flushcourselogs() : flush (save) buffer logs and access logs
4500:
4501: =item *
4502:
4503: courselog($what) : save message for course in hash
4504:
4505: =item *
4506:
4507: courseacclog($what) : save message for course using &courselog(). Perform
4508: special processing for specific resource types (problems, exams, quizzes, etc).
4509:
4510: =item *
4511:
4512: goodbye() : flush course logs and log shutting down; it is called in srm.conf
4513: as a PerlChildExitHandler
4514:
4515: =back
4516:
4517: =head2 Other
4518:
4519: =over 4
4520:
4521: =item *
4522:
4523: symblist($mapname,%newhash) : update symbolic storage links
4524:
4525: =back
4526:
4527: =cut
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