1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.329 2003/02/13 22:22:01 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 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: # ------------------------------------- Find the section of student in a course
592:
593: sub getsection {
594: my ($udom,$unam,$courseid)=@_;
595: $courseid=~s/\_/\//g;
596: $courseid=~s/^(\w)/\/$1/;
597: my %Pending;
598: my %Expired;
599: #
600: # Each role can either have not started yet (pending), be active,
601: # or have expired.
602: #
603: # If there is an active role, we are done.
604: #
605: # If there is more than one role which has not started yet,
606: # choose the one which will start sooner
607: # If there is one role which has not started yet, return it.
608: #
609: # If there is more than one expired role, choose the one which ended last.
610: # If there is a role which has expired, return it.
611: #
612: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
613: &homeserver($unam,$udom)))) {
614: my ($key,$value)=split(/\=/,$_);
615: $key=&unescape($key);
616: next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
617: my $section=$1;
618: if ($key eq $courseid.'_st') { $section=''; }
619: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
620: my $now=time;
621: if (defined($end) && ($now > $end)) {
622: $Expired{$end}=$section;
623: next;
624: }
625: if (defined($start) && ($now < $start)) {
626: $Pending{$start}=$section;
627: next;
628: }
629: return $section;
630: }
631: #
632: # Presumedly there will be few matching roles from the above
633: # loop and the sorting time will be negligible.
634: if (scalar(keys(%Pending))) {
635: my ($time) = sort {$a <=> $b} keys(%Pending);
636: return $Pending{$time};
637: }
638: if (scalar(keys(%Expired))) {
639: my @sorted = sort {$a <=> $b} keys(%Expired);
640: my $time = pop(@sorted);
641: return $Expired{$time};
642: }
643: return '-1';
644: }
645:
646: sub usection {
647: my ($udom,$unam,$courseid)=@_;
648: $courseid=~s/\_/\//g;
649: $courseid=~s/^(\w)/\/$1/;
650: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
651: &homeserver($unam,$udom)))) {
652: my ($key,$value)=split(/\=/,$_);
653: $key=&unescape($key);
654: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
655: my $section=$1;
656: if ($key eq $courseid.'_st') { $section=''; }
657: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
658: my $now=time;
659: my $notactive=0;
660: if ($start) {
661: if ($now<$start) { $notactive=1; }
662: }
663: if ($end) {
664: if ($now>$end) { $notactive=1; }
665: }
666: unless ($notactive) { return $section; }
667: }
668: }
669: return '-1';
670: }
671:
672: # ------------------------------------- Read an entry from a user's environment
673:
674: sub userenvironment {
675: my ($udom,$unam,@what)=@_;
676: my %returnhash=();
677: my @answer=split(/\&/,
678: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
679: &homeserver($unam,$udom)));
680: my $i;
681: for ($i=0;$i<=$#what;$i++) {
682: $returnhash{$what[$i]}=&unescape($answer[$i]);
683: }
684: return %returnhash;
685: }
686:
687: # -------------------------------------------------------------------- New chat
688:
689: sub chatsend {
690: my ($newentry,$anon)=@_;
691: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
692: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
693: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
694: &reply('chatsend:'.$cdom.':'.$cnum.':'.
695: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
696: &escape($newentry)),$chome);
697: }
698:
699: # ------------------------------------------ Find current version of a resource
700:
701: sub getversion {
702: my $fname=&clutter(shift);
703: unless ($fname=~/^\/res\//) { return -1; }
704: return ¤tversion(&filelocation('',$fname));
705: }
706:
707: sub currentversion {
708: my $fname=shift;
709: my $author=$fname;
710: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
711: my ($udom,$uname)=split(/\//,$author);
712: my $home=homeserver($uname,$udom);
713: if ($home eq 'no_host') {
714: return -1;
715: }
716: my $answer=reply("currentversion:$fname",$home);
717: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
718: return -1;
719: }
720: return $answer;
721: }
722:
723: # ----------------------------- Subscribe to a resource, return URL if possible
724:
725: sub subscribe {
726: my $fname=shift;
727: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
728: my $author=$fname;
729: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
730: my ($udom,$uname)=split(/\//,$author);
731: my $home=homeserver($uname,$udom);
732: if ($home eq 'no_host') {
733: return 'not_found';
734: }
735: my $answer=reply("sub:$fname",$home);
736: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
737: $answer.=' by '.$home;
738: }
739: return $answer;
740: }
741:
742: # -------------------------------------------------------------- Replicate file
743:
744: sub repcopy {
745: my $filename=shift;
746: $filename=~s/\/+/\//g;
747: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
748: my $transname="$filename.in.transfer";
749: if ((-e $filename) || (-e $transname)) { return OK; }
750: my $remoteurl=subscribe($filename);
751: if ($remoteurl =~ /^con_lost by/) {
752: &logthis("Subscribe returned $remoteurl: $filename");
753: return HTTP_SERVICE_UNAVAILABLE;
754: } elsif ($remoteurl eq 'not_found') {
755: &logthis("Subscribe returned not_found: $filename");
756: return HTTP_NOT_FOUND;
757: } elsif ($remoteurl =~ /^rejected by/) {
758: &logthis("Subscribe returned $remoteurl: $filename");
759: return FORBIDDEN;
760: } elsif ($remoteurl eq 'directory') {
761: return OK;
762: } else {
763: my $author=$filename;
764: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
765: my ($udom,$uname)=split(/\//,$author);
766: my $home=homeserver($uname,$udom);
767: unless ($home eq $perlvar{'lonHostID'}) {
768: my @parts=split(/\//,$filename);
769: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
770: if ($path ne "$perlvar{'lonDocRoot'}/res") {
771: &logthis("Malconfiguration for replication: $filename");
772: return HTTP_BAD_REQUEST;
773: }
774: my $count;
775: for ($count=5;$count<$#parts;$count++) {
776: $path.="/$parts[$count]";
777: if ((-e $path)!=1) {
778: mkdir($path,0777);
779: }
780: }
781: my $ua=new LWP::UserAgent;
782: my $request=new HTTP::Request('GET',"$remoteurl");
783: my $response=$ua->request($request,$transname);
784: if ($response->is_error()) {
785: unlink($transname);
786: my $message=$response->status_line;
787: &logthis("<font color=blue>WARNING:"
788: ." LWP get: $message: $filename</font>");
789: return HTTP_SERVICE_UNAVAILABLE;
790: } else {
791: if ($remoteurl!~/\.meta$/) {
792: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
793: my $mresponse=$ua->request($mrequest,$filename.'.meta');
794: if ($mresponse->is_error()) {
795: unlink($filename.'.meta');
796: &logthis(
797: "<font color=yellow>INFO: No metadata: $filename</font>");
798: }
799: }
800: rename($transname,$filename);
801: return OK;
802: }
803: }
804: }
805: }
806:
807: # --------------------------------------------------------- Server Side Include
808:
809: sub ssi {
810:
811: my ($fn,%form)=@_;
812:
813: my $ua=new LWP::UserAgent;
814:
815: my $request;
816:
817: if (%form) {
818: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
819: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
820: } else {
821: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
822: }
823:
824: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
825: my $response=$ua->request($request);
826:
827: return $response->content;
828: }
829:
830: sub externalssi {
831: my ($url)=@_;
832: my $ua=new LWP::UserAgent;
833: my $request=new HTTP::Request('GET',$url);
834: my $response=$ua->request($request);
835: return $response->content;
836: }
837:
838: # ------- Add a token to a remote URI's query string to vouch for access rights
839:
840: sub tokenwrapper {
841: my $uri=shift;
842: $uri=~s/^http\:\/\/([^\/]+)//;
843: $uri=~s/^\///;
844: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
845: my $token=$1;
846: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
847: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
848: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
849: (($uri=~/\?/)?'&':'?').'token='.$token.
850: '&tokenissued='.$perlvar{'lonHostID'};
851: } else {
852: return '/adm/notfound.html';
853: }
854: }
855:
856: # --------------- Take an uploaded file and put it into the userfiles directory
857: # input: name of form element, coursedoc=1 means this is for the course
858: # output: url of file in userspace
859:
860: sub userfileupload {
861: my ($formname,$coursedoc)=@_;
862: my $fname=$ENV{'form.'.$formname.'.filename'};
863: # Replace Windows backslashes by forward slashes
864: $fname=~s/\\/\//g;
865: # Get rid of everything but the actual filename
866: $fname=~s/^.*\/([^\/]+)$/$1/;
867: # Replace spaces by underscores
868: $fname=~s/\s+/\_/g;
869: # Replace all other weird characters by nothing
870: $fname=~s/[^\w\.\-]//g;
871: # See if there is anything left
872: unless ($fname) { return 'error: no uploaded file'; }
873: chop($ENV{'form.'.$formname});
874: # Create the directory if not present
875: my $docuname='';
876: my $docudom='';
877: my $docuhome='';
878: if ($coursedoc) {
879: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
880: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
881: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
882: } else {
883: $docuname=$ENV{'user.name'};
884: $docudom=$ENV{'user.domain'};
885: $docuhome=$ENV{'user.home'};
886: }
887: return
888: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
889: }
890:
891: sub finishuserfileupload {
892: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
893: my $path=$docudom.'/'.$docuname.'/';
894: my $filepath=$perlvar{'lonDocRoot'};
895: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
896: my $count;
897: for ($count=4;$count<=$#parts;$count++) {
898: $filepath.="/$parts[$count]";
899: if ((-e $filepath)!=1) {
900: mkdir($filepath,0777);
901: }
902: }
903: # Save the file
904: {
905: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
906: print $fh $ENV{'form.'.$formname};
907: }
908: # Notify homeserver to grep it
909: #
910:
911: my $fetchresult=
912: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
913: if ($fetchresult eq 'ok') {
914: #
915: # Return the URL to it
916: return '/uploaded/'.$path.$fname;
917: } else {
918: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
919: ' to host '.$docuhome.': '.$fetchresult);
920: return '/adm/notfound.html';
921: }
922: }
923:
924: # ------------------------------------------------------------------------- Log
925:
926: sub log {
927: my ($dom,$nam,$hom,$what)=@_;
928: return critical("log:$dom:$nam:$what",$hom);
929: }
930:
931: # ------------------------------------------------------------------ Course Log
932:
933: sub flushcourselogs {
934: &logthis('Flushing course log buffers');
935: foreach (keys %courselogs) {
936: my $crsid=$_;
937: if (&reply('log:'.$coursedombuf{$crsid}.':'.
938: &escape($courselogs{$crsid}),
939: $coursehombuf{$crsid}) eq 'ok') {
940: delete $courselogs{$crsid};
941: } else {
942: &logthis('Failed to flush log buffer for '.$crsid);
943: if (length($courselogs{$crsid})>40000) {
944: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
945: " exceeded maximum size, deleting.</font>");
946: delete $courselogs{$crsid};
947: }
948: }
949: }
950: &logthis('Flushing access logs');
951: foreach (keys %accesshash) {
952: my $entry=$_;
953: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
954: my %temphash=($entry => $accesshash{$entry});
955: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
956: delete $accesshash{$entry};
957: }
958: }
959: $dumpcount++;
960: }
961:
962: sub courselog {
963: my $what=shift;
964: $what=time.':'.$what;
965: unless ($ENV{'request.course.id'}) { return ''; }
966: $coursedombuf{$ENV{'request.course.id'}}=
967: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
968: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
969: $coursehombuf{$ENV{'request.course.id'}}=
970: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
971: if (defined $courselogs{$ENV{'request.course.id'}}) {
972: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
973: } else {
974: $courselogs{$ENV{'request.course.id'}}.=$what;
975: }
976: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
977: &flushcourselogs();
978: }
979: }
980:
981: sub courseacclog {
982: my $fnsymb=shift;
983: unless ($ENV{'request.course.id'}) { return ''; }
984: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
985: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
986: $what.=':POST';
987: foreach (keys %ENV) {
988: if ($_=~/^form\.(.*)/) {
989: $what.=':'.$1.'='.$ENV{$_};
990: }
991: }
992: }
993: &courselog($what);
994: }
995:
996: sub countacc {
997: my $url=&declutter(shift);
998: unless ($ENV{'request.course.id'}) { return ''; }
999: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1000: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1001: if (defined($accesshash{$key})) {
1002: $accesshash{$key}++;
1003: } else {
1004: $accesshash{$key}=1;
1005: }
1006: }
1007:
1008: # ----------------------------------------------------------- Check out an item
1009:
1010: sub checkout {
1011: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1012: my $now=time;
1013: my $lonhost=$perlvar{'lonHostID'};
1014: my $infostr=&escape(
1015: 'CHECKOUTTOKEN&'.
1016: $tuname.'&'.
1017: $tudom.'&'.
1018: $tcrsid.'&'.
1019: $symb.'&'.
1020: $now.'&'.$ENV{'REMOTE_ADDR'});
1021: my $token=&reply('tmpput:'.$infostr,$lonhost);
1022: if ($token=~/^error\:/) {
1023: &logthis("<font color=blue>WARNING: ".
1024: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1025: "</font>");
1026: return '';
1027: }
1028:
1029: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1030: $token=~tr/a-z/A-Z/;
1031:
1032: my %infohash=('resource.0.outtoken' => $token,
1033: 'resource.0.checkouttime' => $now,
1034: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1035:
1036: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1037: return '';
1038: } else {
1039: &logthis("<font color=blue>WARNING: ".
1040: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1041: "</font>");
1042: }
1043:
1044: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1045: &escape('Checkout '.$infostr.' - '.
1046: $token)) ne 'ok') {
1047: return '';
1048: } else {
1049: &logthis("<font color=blue>WARNING: ".
1050: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1051: "</font>");
1052: }
1053: return $token;
1054: }
1055:
1056: # ------------------------------------------------------------ Check in an item
1057:
1058: sub checkin {
1059: my $token=shift;
1060: my $now=time;
1061: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1062: $lonhost=~tr/A-Z/a-z/;
1063: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1064: $dtoken=~s/\W/\_/g;
1065: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1066: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1067:
1068: unless (($tuname) && ($tudom)) {
1069: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1070: return '';
1071: }
1072:
1073: unless (&allowed('mgr',$tcrsid)) {
1074: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1075: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1076: return '';
1077: }
1078:
1079: my %infohash=('resource.0.intoken' => $token,
1080: 'resource.0.checkintime' => $now,
1081: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1082:
1083: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1084: return '';
1085: }
1086:
1087: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1088: &escape('Checkin - '.$token)) ne 'ok') {
1089: return '';
1090: }
1091:
1092: return ($symb,$tuname,$tudom,$tcrsid);
1093: }
1094:
1095: # --------------------------------------------- Set Expire Date for Spreadsheet
1096:
1097: sub expirespread {
1098: my ($uname,$udom,$stype,$usymb)=@_;
1099: my $cid=$ENV{'request.course.id'};
1100: if ($cid) {
1101: my $now=time;
1102: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1103: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1104: $ENV{'course.'.$cid.'.num'}.
1105: ':nohist_expirationdates:'.
1106: &escape($key).'='.$now,
1107: $ENV{'course.'.$cid.'.home'})
1108: }
1109: return 'ok';
1110: }
1111:
1112: # ----------------------------------------------------- Devalidate Spreadsheets
1113:
1114: sub devalidate {
1115: my ($symb,$uname,$udom)=@_;
1116: my $cid=$ENV{'request.course.id'};
1117: if ($cid) {
1118: # delete the stored spreadsheets for
1119: # - the student level sheet of this user in course's homespace
1120: # - the assessment level sheet for this resource
1121: # for this user in user's homespace
1122: my $key=$uname.':'.$udom.':';
1123: my $status=
1124: &del('nohist_calculatedsheets',
1125: [$key.'studentcalc'],
1126: $ENV{'course.'.$cid.'.domain'},
1127: $ENV{'course.'.$cid.'.num'})
1128: .' '.
1129: &del('nohist_calculatedsheets_'.$cid,
1130: [$key.'assesscalc:'.$symb]);
1131: unless ($status eq 'ok ok') {
1132: &logthis('Could not devalidate spreadsheet '.
1133: $uname.' at '.$udom.' for '.
1134: $symb.': '.$status);
1135: }
1136: }
1137: }
1138:
1139: sub get_scalar {
1140: my ($string,$end) = @_;
1141: my $value;
1142: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1143: $value = $1;
1144: } elsif ($$string =~ s/^([^&]*?)&//) {
1145: $value = $1;
1146: }
1147: return &unescape($value);
1148: }
1149:
1150: sub array2str {
1151: my (@array) = @_;
1152: my $result=&arrayref2str(\@array);
1153: $result=~s/^__ARRAY_REF__//;
1154: $result=~s/__END_ARRAY_REF__$//;
1155: return $result;
1156: }
1157:
1158: sub arrayref2str {
1159: my ($arrayref) = @_;
1160: my $result='__ARRAY_REF__';
1161: foreach my $elem (@$arrayref) {
1162: if(ref($elem) eq 'ARRAY') {
1163: $result.=&arrayref2str($elem).'&';
1164: } elsif(ref($elem) eq 'HASH') {
1165: $result.=&hashref2str($elem).'&';
1166: } elsif(ref($elem)) {
1167: #print("Got a ref of ".(ref($elem))." skipping.");
1168: } else {
1169: $result.=&escape($elem).'&';
1170: }
1171: }
1172: $result=~s/\&$//;
1173: $result .= '__END_ARRAY_REF__';
1174: return $result;
1175: }
1176:
1177: sub hash2str {
1178: my (%hash) = @_;
1179: my $result=&hashref2str(\%hash);
1180: $result=~s/^__HASH_REF__//;
1181: $result=~s/__END_HASH_REF__$//;
1182: return $result;
1183: }
1184:
1185: sub hashref2str {
1186: my ($hashref)=@_;
1187: my $result='__HASH_REF__';
1188: foreach (keys(%$hashref)) {
1189: if (ref($_) eq 'ARRAY') {
1190: $result.=&arrayref2str($_).'=';
1191: } elsif (ref($_) eq 'HASH') {
1192: $result.=&hashref2str($_).'=';
1193: } elsif (ref($_)) {
1194: $result.='=';
1195: #print("Got a ref of ".(ref($_))." skipping.");
1196: } else {
1197: if ($_) {$result.=&escape($_).'=';} else { last; }
1198: }
1199:
1200: if(ref($hashref->{$_}) eq 'ARRAY') {
1201: $result.=&arrayref2str($hashref->{$_}).'&';
1202: } elsif(ref($hashref->{$_}) eq 'HASH') {
1203: $result.=&hashref2str($hashref->{$_}).'&';
1204: } elsif(ref($hashref->{$_})) {
1205: $result.='&';
1206: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1207: } else {
1208: $result.=&escape($hashref->{$_}).'&';
1209: }
1210: }
1211: $result=~s/\&$//;
1212: $result .= '__END_HASH_REF__';
1213: return $result;
1214: }
1215:
1216: sub str2hash {
1217: my ($string)=@_;
1218: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1219: return %$hash;
1220: }
1221:
1222: sub str2hashref {
1223: my ($string) = @_;
1224:
1225: my %hash;
1226:
1227: if($string !~ /^__HASH_REF__/) {
1228: if (! ($string eq '' || !defined($string))) {
1229: $hash{'error'}='Not hash reference';
1230: }
1231: return (\%hash, $string);
1232: }
1233:
1234: $string =~ s/^__HASH_REF__//;
1235:
1236: while($string !~ /^__END_HASH_REF__/) {
1237: #key
1238: my $key='';
1239: if($string =~ /^__HASH_REF__/) {
1240: ($key, $string)=&str2hashref($string);
1241: if(defined($key->{'error'})) {
1242: $hash{'error'}='Bad data';
1243: return (\%hash, $string);
1244: }
1245: } elsif($string =~ /^__ARRAY_REF__/) {
1246: ($key, $string)=&str2arrayref($string);
1247: if($key->[0] eq 'Array reference error') {
1248: $hash{'error'}='Bad data';
1249: return (\%hash, $string);
1250: }
1251: } else {
1252: $string =~ s/^(.*?)=//;
1253: $key=&unescape($1);
1254: }
1255: $string =~ s/^=//;
1256:
1257: #value
1258: my $value='';
1259: if($string =~ /^__HASH_REF__/) {
1260: ($value, $string)=&str2hashref($string);
1261: if(defined($value->{'error'})) {
1262: $hash{'error'}='Bad data';
1263: return (\%hash, $string);
1264: }
1265: } elsif($string =~ /^__ARRAY_REF__/) {
1266: ($value, $string)=&str2arrayref($string);
1267: if($value->[0] eq 'Array reference error') {
1268: $hash{'error'}='Bad data';
1269: return (\%hash, $string);
1270: }
1271: } else {
1272: $value=&get_scalar(\$string,'__END_HASH_REF__');
1273: }
1274: $string =~ s/^&//;
1275:
1276: $hash{$key}=$value;
1277: }
1278:
1279: $string =~ s/^__END_HASH_REF__//;
1280:
1281: return (\%hash, $string);
1282: }
1283:
1284: sub str2array {
1285: my ($string)=@_;
1286: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1287: return @$array;
1288: }
1289:
1290: sub str2arrayref {
1291: my ($string) = @_;
1292: my @array;
1293:
1294: if($string !~ /^__ARRAY_REF__/) {
1295: if (! ($string eq '' || !defined($string))) {
1296: $array[0]='Array reference error';
1297: }
1298: return (\@array, $string);
1299: }
1300:
1301: $string =~ s/^__ARRAY_REF__//;
1302:
1303: while($string !~ /^__END_ARRAY_REF__/) {
1304: my $value='';
1305: if($string =~ /^__HASH_REF__/) {
1306: ($value, $string)=&str2hashref($string);
1307: if(defined($value->{'error'})) {
1308: $array[0] ='Array reference error';
1309: return (\@array, $string);
1310: }
1311: } elsif($string =~ /^__ARRAY_REF__/) {
1312: ($value, $string)=&str2arrayref($string);
1313: if($value->[0] eq 'Array reference error') {
1314: $array[0] ='Array reference error';
1315: return (\@array, $string);
1316: }
1317: } else {
1318: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1319: }
1320: $string =~ s/^&//;
1321:
1322: push(@array, $value);
1323: }
1324:
1325: $string =~ s/^__END_ARRAY_REF__//;
1326:
1327: return (\@array, $string);
1328: }
1329:
1330: # -------------------------------------------------------------------Temp Store
1331:
1332: sub tmpreset {
1333: my ($symb,$namespace,$domain,$stuname) = @_;
1334: if (!$symb) {
1335: $symb=&symbread();
1336: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1337: }
1338: $symb=escape($symb);
1339:
1340: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1341: $namespace=~s/\//\_/g;
1342: $namespace=~s/\W//g;
1343:
1344: #FIXME needs to do something for /pub resources
1345: if (!$domain) { $domain=$ENV{'user.domain'}; }
1346: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1347: my $path=$perlvar{'lonDaemons'}.'/tmp';
1348: my %hash;
1349: if (tie(%hash,'GDBM_File',
1350: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1351: &GDBM_WRCREAT(),0640)) {
1352: foreach my $key (keys %hash) {
1353: if ($key=~ /:$symb/) {
1354: delete($hash{$key});
1355: }
1356: }
1357: }
1358: }
1359:
1360: sub tmpstore {
1361: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1362:
1363: if (!$symb) {
1364: $symb=&symbread();
1365: if (!$symb) { $symb= $ENV{'request.url'}; }
1366: }
1367: $symb=escape($symb);
1368:
1369: if (!$namespace) {
1370: # I don't think we would ever want to store this for a course.
1371: # it seems this will only be used if we don't have a course.
1372: #$namespace=$ENV{'request.course.id'};
1373: #if (!$namespace) {
1374: $namespace=$ENV{'request.state'};
1375: #}
1376: }
1377: $namespace=~s/\//\_/g;
1378: $namespace=~s/\W//g;
1379: #FIXME needs to do something for /pub resources
1380: if (!$domain) { $domain=$ENV{'user.domain'}; }
1381: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1382: my $now=time;
1383: my %hash;
1384: my $path=$perlvar{'lonDaemons'}.'/tmp';
1385: if (tie(%hash,'GDBM_File',
1386: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1387: &GDBM_WRCREAT(),0640)) {
1388: $hash{"version:$symb"}++;
1389: my $version=$hash{"version:$symb"};
1390: my $allkeys='';
1391: foreach my $key (keys(%$storehash)) {
1392: $allkeys.=$key.':';
1393: $hash{"$version:$symb:$key"}=$$storehash{$key};
1394: }
1395: $hash{"$version:$symb:timestamp"}=$now;
1396: $allkeys.='timestamp';
1397: $hash{"$version:keys:$symb"}=$allkeys;
1398: if (untie(%hash)) {
1399: return 'ok';
1400: } else {
1401: return "error:$!";
1402: }
1403: } else {
1404: return "error:$!";
1405: }
1406: }
1407:
1408: # -----------------------------------------------------------------Temp Restore
1409:
1410: sub tmprestore {
1411: my ($symb,$namespace,$domain,$stuname) = @_;
1412:
1413: if (!$symb) {
1414: $symb=&symbread();
1415: if (!$symb) { $symb= $ENV{'request.url'}; }
1416: }
1417: $symb=escape($symb);
1418:
1419: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1420: #FIXME needs to do something for /pub resources
1421: if (!$domain) { $domain=$ENV{'user.domain'}; }
1422: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1423:
1424: my %returnhash;
1425: $namespace=~s/\//\_/g;
1426: $namespace=~s/\W//g;
1427: my %hash;
1428: my $path=$perlvar{'lonDaemons'}.'/tmp';
1429: if (tie(%hash,'GDBM_File',
1430: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1431: &GDBM_READER(),0640)) {
1432: my $version=$hash{"version:$symb"};
1433: $returnhash{'version'}=$version;
1434: my $scope;
1435: for ($scope=1;$scope<=$version;$scope++) {
1436: my $vkeys=$hash{"$scope:keys:$symb"};
1437: my @keys=split(/:/,$vkeys);
1438: my $key;
1439: $returnhash{"$scope:keys"}=$vkeys;
1440: foreach $key (@keys) {
1441: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1442: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1443: }
1444: }
1445: if (!(untie(%hash))) {
1446: return "error:$!";
1447: }
1448: } else {
1449: return "error:$!";
1450: }
1451: return %returnhash;
1452: }
1453:
1454: # ----------------------------------------------------------------------- Store
1455:
1456: sub store {
1457: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1458: my $home='';
1459:
1460: if ($stuname) { $home=&homeserver($stuname,$domain); }
1461:
1462: $symb=&symbclean($symb);
1463: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1464:
1465: if (!$domain) { $domain=$ENV{'user.domain'}; }
1466: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1467:
1468: &devalidate($symb,$stuname,$domain);
1469:
1470: $symb=escape($symb);
1471: if (!$namespace) {
1472: unless ($namespace=$ENV{'request.course.id'}) {
1473: return '';
1474: }
1475: }
1476: if (!$home) { $home=$ENV{'user.home'}; }
1477: my $namevalue='';
1478: foreach (keys %$storehash) {
1479: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1480: }
1481: $namevalue=~s/\&$//;
1482: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1483: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1484: }
1485:
1486: # -------------------------------------------------------------- Critical Store
1487:
1488: sub cstore {
1489: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1490: my $home='';
1491:
1492: if ($stuname) { $home=&homeserver($stuname,$domain); }
1493:
1494: $symb=&symbclean($symb);
1495: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1496:
1497: if (!$domain) { $domain=$ENV{'user.domain'}; }
1498: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1499:
1500: &devalidate($symb,$stuname,$domain);
1501:
1502: $symb=escape($symb);
1503: if (!$namespace) {
1504: unless ($namespace=$ENV{'request.course.id'}) {
1505: return '';
1506: }
1507: }
1508: if (!$home) { $home=$ENV{'user.home'}; }
1509:
1510: my $namevalue='';
1511: foreach (keys %$storehash) {
1512: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1513: }
1514: $namevalue=~s/\&$//;
1515: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1516: return critical
1517: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1518: }
1519:
1520: # --------------------------------------------------------------------- Restore
1521:
1522: sub restore {
1523: my ($symb,$namespace,$domain,$stuname) = @_;
1524: my $home='';
1525:
1526: if ($stuname) { $home=&homeserver($stuname,$domain); }
1527:
1528: if (!$symb) {
1529: unless ($symb=escape(&symbread())) { return ''; }
1530: } else {
1531: $symb=&escape(&symbclean($symb));
1532: }
1533: if (!$namespace) {
1534: unless ($namespace=$ENV{'request.course.id'}) {
1535: return '';
1536: }
1537: }
1538: if (!$domain) { $domain=$ENV{'user.domain'}; }
1539: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1540: if (!$home) { $home=$ENV{'user.home'}; }
1541: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1542:
1543: my %returnhash=();
1544: foreach (split(/\&/,$answer)) {
1545: my ($name,$value)=split(/\=/,$_);
1546: $returnhash{&unescape($name)}=&unescape($value);
1547: }
1548: my $version;
1549: for ($version=1;$version<=$returnhash{'version'};$version++) {
1550: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1551: $returnhash{$_}=$returnhash{$version.':'.$_};
1552: }
1553: }
1554: return %returnhash;
1555: }
1556:
1557: # ---------------------------------------------------------- Course Description
1558:
1559: sub coursedescription {
1560: my $courseid=shift;
1561: $courseid=~s/^\///;
1562: $courseid=~s/\_/\//g;
1563: my ($cdomain,$cnum)=split(/\//,$courseid);
1564: my $chome=&homeserver($cnum,$cdomain);
1565: my $normalid=$cdomain.'_'.$cnum;
1566: # need to always cache even if we get errors otherwise we keep
1567: # trying and trying and trying to get the course description.
1568: my %envhash=();
1569: my %returnhash=();
1570: $envhash{'course.'.$normalid.'.last_cache'}=time;
1571: if ($chome ne 'no_host') {
1572: %returnhash=&dump('environment',$cdomain,$cnum);
1573: if (!exists($returnhash{'con_lost'})) {
1574: $returnhash{'home'}= $chome;
1575: $returnhash{'domain'} = $cdomain;
1576: $returnhash{'num'} = $cnum;
1577: while (my ($name,$value) = each %returnhash) {
1578: $envhash{'course.'.$normalid.'.'.$name}=$value;
1579: }
1580: $returnhash{'url'}=&clutter($returnhash{'url'});
1581: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1582: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1583: $envhash{'course.'.$normalid.'.home'}=$chome;
1584: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1585: $envhash{'course.'.$normalid.'.num'}=$cnum;
1586: }
1587: }
1588: &appenv(%envhash);
1589: return %returnhash;
1590: }
1591:
1592: # -------------------------------------------------------- Get user privileges
1593:
1594: sub rolesinit {
1595: my ($domain,$username,$authhost)=@_;
1596: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1597: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1598: my %allroles=();
1599: my %thesepriv=();
1600: my $now=time;
1601: my $userroles="user.login.time=$now\n";
1602: my $thesestr;
1603:
1604: if ($rolesdump ne '') {
1605: foreach (split(/&/,$rolesdump)) {
1606: if ($_!~/^rolesdef\&/) {
1607: my ($area,$role)=split(/=/,$_);
1608: $area=~s/\_\w\w$//;
1609: my ($trole,$tend,$tstart)=split(/_/,$role);
1610: $userroles.='user.role.'.$trole.'.'.$area.'='.
1611: $tstart.'.'.$tend."\n";
1612: if ($tend!=0) {
1613: if ($tend<$now) {
1614: $trole='';
1615: }
1616: }
1617: if ($tstart!=0) {
1618: if ($tstart>$now) {
1619: $trole='';
1620: }
1621: }
1622: if (($area ne '') && ($trole ne '')) {
1623: my $spec=$trole.'.'.$area;
1624: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1625: if ($trole =~ /^cr\//) {
1626: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1627: my $homsvr=homeserver($rauthor,$rdomain);
1628: if ($hostname{$homsvr} ne '') {
1629: my $roledef=
1630: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1631: $homsvr);
1632: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1633: my ($syspriv,$dompriv,$coursepriv)=
1634: split(/\_/,unescape($roledef));
1635: $allroles{'cm./'}.=':'.$syspriv;
1636: $allroles{$spec.'./'}.=':'.$syspriv;
1637: if ($tdomain ne '') {
1638: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1639: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1640: if ($trest ne '') {
1641: $allroles{'cm.'.$area}.=':'.$coursepriv;
1642: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1643: }
1644: }
1645: }
1646: }
1647: } else {
1648: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1649: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1650: if ($tdomain ne '') {
1651: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1652: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1653: if ($trest ne '') {
1654: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1655: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1656: }
1657: }
1658: }
1659: }
1660: }
1661: }
1662: my $adv=0;
1663: my $author=0;
1664: foreach (keys %allroles) {
1665: %thesepriv=();
1666: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1667: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1668: foreach (split(/:/,$allroles{$_})) {
1669: if ($_ ne '') {
1670: my ($privilege,$restrictions)=split(/&/,$_);
1671: if ($restrictions eq '') {
1672: $thesepriv{$privilege}='F';
1673: } else {
1674: if ($thesepriv{$privilege} ne 'F') {
1675: $thesepriv{$privilege}.=$restrictions;
1676: }
1677: }
1678: }
1679: }
1680: $thesestr='';
1681: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1682: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1683: }
1684: $userroles.='user.adv='.$adv."\n".
1685: 'user.author='.$author."\n";
1686: $ENV{'user.adv'}=$adv;
1687: }
1688: return $userroles;
1689: }
1690:
1691: # --------------------------------------------------------------- get interface
1692:
1693: sub get {
1694: my ($namespace,$storearr,$udomain,$uname)=@_;
1695: my $items='';
1696: foreach (@$storearr) {
1697: $items.=escape($_).'&';
1698: }
1699: $items=~s/\&$//;
1700: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1701: if (!$uname) { $uname=$ENV{'user.name'}; }
1702: my $uhome=&homeserver($uname,$udomain);
1703:
1704: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1705: my @pairs=split(/\&/,$rep);
1706: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1707: return @pairs;
1708: }
1709: my %returnhash=();
1710: my $i=0;
1711: foreach (@$storearr) {
1712: $returnhash{$_}=unescape($pairs[$i]);
1713: $i++;
1714: }
1715: return %returnhash;
1716: }
1717:
1718: # --------------------------------------------------------------- del interface
1719:
1720: sub del {
1721: my ($namespace,$storearr,$udomain,$uname)=@_;
1722: my $items='';
1723: foreach (@$storearr) {
1724: $items.=escape($_).'&';
1725: }
1726: $items=~s/\&$//;
1727: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1728: if (!$uname) { $uname=$ENV{'user.name'}; }
1729: my $uhome=&homeserver($uname,$udomain);
1730:
1731: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1732: }
1733:
1734: # -------------------------------------------------------------- dump interface
1735:
1736: sub dump {
1737: my ($namespace,$udomain,$uname,$regexp)=@_;
1738: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1739: if (!$uname) { $uname=$ENV{'user.name'}; }
1740: my $uhome=&homeserver($uname,$udomain);
1741: if ($regexp) {
1742: $regexp=&escape($regexp);
1743: } else {
1744: $regexp='.';
1745: }
1746: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1747: my @pairs=split(/\&/,$rep);
1748: my %returnhash=();
1749: foreach (@pairs) {
1750: my ($key,$value)=split(/=/,$_);
1751: $returnhash{unescape($key)}=unescape($value);
1752: }
1753: return %returnhash;
1754: }
1755:
1756: # --------------------------------------------------------------- currentdump
1757: sub currentdump {
1758: my ($courseid,$sdom,$sname)=@_;
1759: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1760: $sdom = $ENV{'user.domain'} if (! defined($sdom));
1761: $sname = $ENV{'user.name'} if (! defined($sname));
1762: my $uhome = &homeserver($sname,$sdom);
1763: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
1764: return if ($rep =~ /^(error:|no_such_host)/);
1765: #
1766: my %returnhash=();
1767: #
1768: if ($rep eq "unknown_cmd") {
1769: # an old lond will not know currentdump
1770: # Do a dump and make it look like a currentdump
1771: my @tmp = &dump($courseid,$sdom,$sname,'.');
1772: return if ($tmp[0] =~ /^(error:|no_such_host)/);
1773: my %hash = @tmp;
1774: @tmp=();
1775: # Code ripped from lond, essentially. The only difference
1776: # here is the unescaping done by lonnet::dump(). Conceivably
1777: # we might run in to problems with parameter names =~ /^v\./
1778: while (my ($key,$value) = each(%hash)) {
1779: my ($v,$symb,$param) = split(/:/,$key);
1780: next if ($v eq 'version' || $symb eq 'keys');
1781: next if (exists($returnhash{$symb}) &&
1782: exists($returnhash{$symb}->{$param}) &&
1783: $returnhash{$symb}->{'v.'.$param} > $v);
1784: $returnhash{$symb}->{$param}=$value;
1785: $returnhash{$symb}->{'v.'.$param}=$v;
1786: }
1787: #
1788: # Remove all of the keys in the hashes which keep track of
1789: # the version of the parameter.
1790: while (my ($symb,$param_hash) = each(%returnhash)) {
1791: # use a foreach because we are going to delete from the hash.
1792: foreach my $key (keys(%$param_hash)) {
1793: delete($param_hash->{$key}) if ($key =~ /^v\./);
1794: }
1795: }
1796: } else {
1797: my @pairs=split(/\&/,$rep);
1798: foreach (@pairs) {
1799: my ($key,$value)=split(/=/,$_);
1800: my ($symb,$param) = split(/:/,$key);
1801: $returnhash{&unescape($symb)}->{&unescape($param)} =
1802: &unescape($value);
1803: }
1804: }
1805: return %returnhash;
1806: }
1807:
1808: # --------------------------------------------------------------- put interface
1809:
1810: sub put {
1811: my ($namespace,$storehash,$udomain,$uname)=@_;
1812: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1813: if (!$uname) { $uname=$ENV{'user.name'}; }
1814: my $uhome=&homeserver($uname,$udomain);
1815: my $items='';
1816: foreach (keys %$storehash) {
1817: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1818: }
1819: $items=~s/\&$//;
1820: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1821: }
1822:
1823: # ------------------------------------------------------ critical put interface
1824:
1825: sub cput {
1826: my ($namespace,$storehash,$udomain,$uname)=@_;
1827: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1828: if (!$uname) { $uname=$ENV{'user.name'}; }
1829: my $uhome=&homeserver($uname,$udomain);
1830: my $items='';
1831: foreach (keys %$storehash) {
1832: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1833: }
1834: $items=~s/\&$//;
1835: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1836: }
1837:
1838: # -------------------------------------------------------------- eget interface
1839:
1840: sub eget {
1841: my ($namespace,$storearr,$udomain,$uname)=@_;
1842: my $items='';
1843: foreach (@$storearr) {
1844: $items.=escape($_).'&';
1845: }
1846: $items=~s/\&$//;
1847: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1848: if (!$uname) { $uname=$ENV{'user.name'}; }
1849: my $uhome=&homeserver($uname,$udomain);
1850: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1851: my @pairs=split(/\&/,$rep);
1852: my %returnhash=();
1853: my $i=0;
1854: foreach (@$storearr) {
1855: $returnhash{$_}=unescape($pairs[$i]);
1856: $i++;
1857: }
1858: return %returnhash;
1859: }
1860:
1861: # ------------------------------------------------- Check for a user privilege
1862:
1863: sub allowed {
1864: my ($priv,$uri)=@_;
1865:
1866: my $orguri=$uri;
1867: $uri=&declutter($uri);
1868:
1869: # Free bre access to adm and meta resources
1870:
1871: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1872: return 'F';
1873: }
1874:
1875: # Free bre to public access
1876:
1877: if ($priv eq 'bre') {
1878: my $copyright=&metadata($uri,'copyright');
1879: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
1880: return 'F';
1881: }
1882: if ($copyright eq 'priv') {
1883: $uri=~/([^\/]+)\/([^\/]+)\//;
1884: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
1885: return '';
1886: }
1887: }
1888: if ($copyright eq 'domain') {
1889: $uri=~/([^\/]+)\/([^\/]+)\//;
1890: unless (($ENV{'user.domain'} eq $1) ||
1891: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
1892: return '';
1893: }
1894: }
1895: if ($ENV{'request.role'}=~ /li\.\//) {
1896: # Library role, so allow browsing of resources in this domain.
1897: return 'F';
1898: }
1899: }
1900: # Domain coordinator is trying to create a course
1901: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
1902: # uri is the requested domain in this case.
1903: # comparison to 'request.role.domain' shows if the user has selected
1904: # a role of dc for the domain in question.
1905: return 'F' if ($uri eq $ENV{'request.role.domain'});
1906: }
1907:
1908: my $thisallowed='';
1909: my $statecond=0;
1910: my $courseprivid='';
1911:
1912: # Course
1913:
1914: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1915: $thisallowed.=$1;
1916: }
1917:
1918: # Domain
1919:
1920: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1921: =~/$priv\&([^\:]*)/) {
1922: $thisallowed.=$1;
1923: }
1924:
1925: # Course: uri itself is a course
1926: my $courseuri=$uri;
1927: $courseuri=~s/\_(\d)/\/$1/;
1928: $courseuri=~s/^([^\/])/\/$1/;
1929:
1930: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1931: =~/$priv\&([^\:]*)/) {
1932: $thisallowed.=$1;
1933: }
1934:
1935: # URI is an uploaded document for this course
1936:
1937: if (($priv eq 'bre') &&
1938: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
1939: return 'F';
1940: }
1941: # Full access at system, domain or course-wide level? Exit.
1942:
1943: if ($thisallowed=~/F/) {
1944: return 'F';
1945: }
1946:
1947: # If this is generating or modifying users, exit with special codes
1948:
1949: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1950: return $thisallowed;
1951: }
1952: #
1953: # Gathered so far: system, domain and course wide privileges
1954: #
1955: # Course: See if uri or referer is an individual resource that is part of
1956: # the course
1957:
1958: if ($ENV{'request.course.id'}) {
1959:
1960: $courseprivid=$ENV{'request.course.id'};
1961: if ($ENV{'request.course.sec'}) {
1962: $courseprivid.='/'.$ENV{'request.course.sec'};
1963: }
1964: $courseprivid=~s/\_/\//;
1965: my $checkreferer=1;
1966: my ($match,$cond)=&is_on_map($uri);
1967: if ($match) {
1968: $statecond=$cond;
1969: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1970: =~/$priv\&([^\:]*)/) {
1971: $thisallowed.=$1;
1972: $checkreferer=0;
1973: }
1974: }
1975:
1976: if ($checkreferer) {
1977: my $refuri=$ENV{'httpref.'.$orguri};
1978: unless ($refuri) {
1979: foreach (keys %ENV) {
1980: if ($_=~/^httpref\..*\*/) {
1981: my $pattern=$_;
1982: $pattern=~s/^httpref\.\/res\///;
1983: $pattern=~s/\*/\[\^\/\]\+/g;
1984: $pattern=~s/\//\\\//g;
1985: if ($orguri=~/$pattern/) {
1986: $refuri=$ENV{$_};
1987: }
1988: }
1989: }
1990: }
1991:
1992: if ($refuri) {
1993: $refuri=&declutter($refuri);
1994: my ($match,$cond)=&is_on_map($refuri);
1995: if ($match) {
1996: my $refstatecond=$cond;
1997: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1998: =~/$priv\&([^\:]*)/) {
1999: $thisallowed.=$1;
2000: $uri=$refuri;
2001: $statecond=$refstatecond;
2002: }
2003: }
2004: }
2005: }
2006: }
2007:
2008: #
2009: # Gathered now: all privileges that could apply, and condition number
2010: #
2011: #
2012: # Full or no access?
2013: #
2014:
2015: if ($thisallowed=~/F/) {
2016: return 'F';
2017: }
2018:
2019: unless ($thisallowed) {
2020: return '';
2021: }
2022:
2023: # Restrictions exist, deal with them
2024: #
2025: # C:according to course preferences
2026: # R:according to resource settings
2027: # L:unless locked
2028: # X:according to user session state
2029: #
2030:
2031: # Possibly locked functionality, check all courses
2032: # Locks might take effect only after 10 minutes cache expiration for other
2033: # courses, and 2 minutes for current course
2034:
2035: my $envkey;
2036: if ($thisallowed=~/L/) {
2037: foreach $envkey (keys %ENV) {
2038: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2039: my $courseid=$2;
2040: my $roleid=$1.'.'.$2;
2041: $courseid=~s/^\///;
2042: my $expiretime=600;
2043: if ($ENV{'request.role'} eq $roleid) {
2044: $expiretime=120;
2045: }
2046: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2047: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2048: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2049: &coursedescription($courseid);
2050: }
2051: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2052: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2053: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2054: &log($ENV{'user.domain'},$ENV{'user.name'},
2055: $ENV{'user.home'},
2056: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2057: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2058: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2059: return '';
2060: }
2061: }
2062: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2063: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2064: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2065: &log($ENV{'user.domain'},$ENV{'user.name'},
2066: $ENV{'user.home'},
2067: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2068: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2069: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2070: return '';
2071: }
2072: }
2073: }
2074: }
2075: }
2076:
2077: #
2078: # Rest of the restrictions depend on selected course
2079: #
2080:
2081: unless ($ENV{'request.course.id'}) {
2082: return '1';
2083: }
2084:
2085: #
2086: # Now user is definitely in a course
2087: #
2088:
2089:
2090: # Course preferences
2091:
2092: if ($thisallowed=~/C/) {
2093: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2094: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2095: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2096: =~/$rolecode/) {
2097: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2098: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2099: $ENV{'request.course.id'});
2100: return '';
2101: }
2102:
2103: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2104: =~/$unamedom/) {
2105: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2106: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2107: $ENV{'request.course.id'});
2108: return '';
2109: }
2110: }
2111:
2112: # Resource preferences
2113:
2114: if ($thisallowed=~/R/) {
2115: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2116: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
2117: if (-e $filename) {
2118: my @content;
2119: {
2120: my $fh=Apache::File->new($filename);
2121: @content=<$fh>;
2122: }
2123: if (join('',@content)=~
2124: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
2125: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2126: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2127: return '';
2128:
2129: }
2130: }
2131: }
2132:
2133: # Restricted by state or randomout?
2134:
2135: if ($thisallowed=~/X/) {
2136: if ($ENV{'acc.randomout'}) {
2137: my $symb=&symbread($uri,1);
2138: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2139: return '';
2140: }
2141: }
2142: if (&condval($statecond)) {
2143: return '2';
2144: } else {
2145: return '';
2146: }
2147: }
2148:
2149: return 'F';
2150: }
2151:
2152: # --------------------------------------------------- Is a resource on the map?
2153:
2154: sub is_on_map {
2155: my $uri=&declutter(shift);
2156: my @uriparts=split(/\//,$uri);
2157: my $filename=$uriparts[$#uriparts];
2158: my $pathname=$uri;
2159: $pathname=~s|/\Q$filename\E$||;
2160: #Trying to find the conditional for the file
2161: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2162: /\&\Q$filename\E\:([\d\|]+)\&/);
2163: if ($match) {
2164: return (1,$1);
2165: } else {
2166: return (0,0);
2167: }
2168: }
2169:
2170: # ----------------------------------------------------------------- Define Role
2171:
2172: sub definerole {
2173: if (allowed('mcr','/')) {
2174: my ($rolename,$sysrole,$domrole,$courole)=@_;
2175: foreach (split('/',$sysrole)) {
2176: my ($crole,$cqual)=split(/\&/,$_);
2177: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2178: if ($pr{'cr:s'}=~/$crole\&/) {
2179: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2180: return "refused:s:$crole&$cqual";
2181: }
2182: }
2183: }
2184: foreach (split('/',$domrole)) {
2185: my ($crole,$cqual)=split(/\&/,$_);
2186: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2187: if ($pr{'cr:d'}=~/$crole\&/) {
2188: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2189: return "refused:d:$crole&$cqual";
2190: }
2191: }
2192: }
2193: foreach (split('/',$courole)) {
2194: my ($crole,$cqual)=split(/\&/,$_);
2195: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2196: if ($pr{'cr:c'}=~/$crole\&/) {
2197: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2198: return "refused:c:$crole&$cqual";
2199: }
2200: }
2201: }
2202: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2203: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2204: "rolesdef_$rolename=".
2205: escape($sysrole.'_'.$domrole.'_'.$courole);
2206: return reply($command,$ENV{'user.home'});
2207: } else {
2208: return 'refused';
2209: }
2210: }
2211:
2212: # ---------------- Make a metadata query against the network of library servers
2213:
2214: sub metadata_query {
2215: my ($query,$custom,$customshow,$server_array)=@_;
2216: my %rhash;
2217: my @server_list = (defined($server_array) ? @$server_array
2218: : keys(%libserv) );
2219: for my $server (@server_list) {
2220: unless ($custom or $customshow) {
2221: my $reply=&reply("querysend:".&escape($query),$server);
2222: $rhash{$server}=$reply;
2223: }
2224: else {
2225: my $reply=&reply("querysend:".&escape($query).':'.
2226: &escape($custom).':'.&escape($customshow),
2227: $server);
2228: $rhash{$server}=$reply;
2229: }
2230: }
2231: return \%rhash;
2232: }
2233:
2234: # ----------------------------------------- Send log queries and wait for reply
2235:
2236: sub log_query {
2237: my ($uname,$udom,$query,%filters)=@_;
2238: my $uhome=&homeserver($uname,$udom);
2239: if ($uhome eq 'no_host') { return 'error: no_host'; }
2240: my $uhost=$hostname{$uhome};
2241: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2242: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2243: $uhome);
2244: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2245: return get_query_reply($queryid);
2246: }
2247:
2248: sub get_query_reply {
2249: my $queryid=shift;
2250: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2251: my $reply='';
2252: for (1..100) {
2253: sleep 2;
2254: if (-e $replyfile.'.end') {
2255: if (my $fh=Apache::File->new($replyfile)) {
2256: $reply.=<$fh>;
2257: $fh->close;
2258: } else { return 'error: reply_file_error'; }
2259: return &unescape($reply);
2260: }
2261: }
2262: return 'timeout:'.$queryid;
2263: }
2264:
2265: sub courselog_query {
2266: #
2267: # possible filters:
2268: # url: url or symb
2269: # username
2270: # domain
2271: # action: view, submit, grade
2272: # start: timestamp
2273: # end: timestamp
2274: #
2275: my (%filters)=@_;
2276: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2277: if ($filters{'url'}) {
2278: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2279: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2280: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2281: }
2282: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2283: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2284: return &log_query($cname,$cdom,'courselog',%filters);
2285: }
2286:
2287: sub userlog_query {
2288: my ($uname,$udom,%filters)=@_;
2289: return &log_query($uname,$udom,'userlog',%filters);
2290: }
2291:
2292: # ------------------------------------------------------------------ Plain Text
2293:
2294: sub plaintext {
2295: my $short=shift;
2296: return $prp{$short};
2297: }
2298:
2299: # ----------------------------------------------------------------- Assign Role
2300:
2301: sub assignrole {
2302: my ($udom,$uname,$url,$role,$end,$start)=@_;
2303: my $mrole;
2304: if ($role =~ /^cr\//) {
2305: unless (&allowed('ccr',$url)) {
2306: &logthis('Refused custom assignrole: '.
2307: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2308: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2309: return 'refused';
2310: }
2311: $mrole='cr';
2312: } else {
2313: my $cwosec=$url;
2314: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2315: unless (&allowed('c'.$role,$cwosec)) {
2316: &logthis('Refused assignrole: '.
2317: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2318: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2319: return 'refused';
2320: }
2321: $mrole=$role;
2322: }
2323: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2324: "$udom:$uname:$url".'_'."$mrole=$role";
2325: if ($end) { $command.='_'.$end; }
2326: if ($start) {
2327: if ($end) {
2328: $command.='_'.$start;
2329: } else {
2330: $command.='_0_'.$start;
2331: }
2332: }
2333: return &reply($command,&homeserver($uname,$udom));
2334: }
2335:
2336: # -------------------------------------------------- Modify user authentication
2337: # Overrides without validation
2338:
2339: sub modifyuserauth {
2340: my ($udom,$uname,$umode,$upass)=@_;
2341: my $uhome=&homeserver($uname,$udom);
2342: unless (&allowed('mau',$udom)) { return 'refused'; }
2343: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2344: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2345: ' in domain '.$ENV{'request.role.domain'});
2346: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2347: &escape($upass),$uhome);
2348: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2349: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2350: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2351: &log($udom,,$uname,$uhome,
2352: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2353: $ENV{'user.name'}.', '.$umode.
2354: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2355: unless ($reply eq 'ok') {
2356: &logthis('Authentication mode error: '.$reply);
2357: return 'error: '.$reply;
2358: }
2359: return 'ok';
2360: }
2361:
2362: # --------------------------------------------------------------- Modify a user
2363:
2364: sub modifyuser {
2365: my ($udom, $uname, $uid,
2366: $umode, $upass, $first,
2367: $middle, $last, $gene,
2368: $forceid, $desiredhome)=@_;
2369: $udom=~s/\W//g;
2370: $uname=~s/\W//g;
2371: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2372: $umode.', '.$first.', '.$middle.', '.
2373: $last.', '.$gene.'(forceid: '.$forceid.')'.
2374: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2375: ' desiredhome not specified').
2376: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2377: ' in domain '.$ENV{'request.role.domain'});
2378: my $uhome=&homeserver($uname,$udom,'true');
2379: # ----------------------------------------------------------------- Create User
2380: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2381: my $unhome='';
2382: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2383: $unhome = $desiredhome;
2384: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2385: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2386: } else { # load balancing routine for determining $unhome
2387: my $tryserver;
2388: my $loadm=10000000;
2389: foreach $tryserver (keys %libserv) {
2390: if ($hostdom{$tryserver} eq $udom) {
2391: my $answer=reply('load',$tryserver);
2392: if (($answer=~/\d+/) && ($answer<$loadm)) {
2393: $loadm=$answer;
2394: $unhome=$tryserver;
2395: }
2396: }
2397: }
2398: }
2399: if (($unhome eq '') || ($unhome eq 'no_host')) {
2400: return 'error: unable to find a home server for '.$uname.
2401: ' in domain '.$udom;
2402: }
2403: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2404: &escape($upass),$unhome);
2405: unless ($reply eq 'ok') {
2406: return 'error: '.$reply;
2407: }
2408: $uhome=&homeserver($uname,$udom,'true');
2409: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2410: return 'error: verify home';
2411: }
2412: } # End of creation of new user
2413: # ---------------------------------------------------------------------- Add ID
2414: if ($uid) {
2415: $uid=~tr/A-Z/a-z/;
2416: my %uidhash=&idrget($udom,$uname);
2417: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2418: && (!$forceid)) {
2419: unless ($uid eq $uidhash{$uname}) {
2420: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2421: }
2422: } else {
2423: &idput($udom,($uname => $uid));
2424: }
2425: }
2426: # -------------------------------------------------------------- Add names, etc
2427: my @tmp=&get('environment',
2428: ['firstname','middlename','lastname','generation'],
2429: $udom,$uname);
2430: my %names;
2431: if ($tmp[0] =~ m/^error:.*/) {
2432: %names=();
2433: } else {
2434: %names = @tmp;
2435: }
2436: if ($first) { $names{'firstname'} = $first; }
2437: if ($middle) { $names{'middlename'} = $middle; }
2438: if ($last) { $names{'lastname'} = $last; }
2439: if ($gene) { $names{'generation'} = $gene; }
2440: my $reply = &put('environment', \%names, $udom,$uname);
2441: if ($reply ne 'ok') { return 'error: '.$reply; }
2442: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2443: $umode.', '.$first.', '.$middle.', '.
2444: $last.', '.$gene.' by '.
2445: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2446: return 'ok';
2447: }
2448:
2449: # -------------------------------------------------------------- Modify student
2450:
2451: sub modifystudent {
2452: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2453: $end,$start,$forceid,$desiredhome)=@_;
2454: my $cid='';
2455: unless ($cid=$ENV{'request.course.id'}) {
2456: return 'not_in_class';
2457: }
2458: # --------------------------------------------------------------- Make the user
2459: my $reply=&modifyuser
2460: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2461: $desiredhome);
2462: unless ($reply eq 'ok') { return $reply; }
2463: # This will cause &modify_student_enrollment to get the uid from the
2464: # students environment
2465: $uid = undef if (!$forceid);
2466: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2467: $last,$gene,$usec,$end,$start);
2468: return $reply;
2469: }
2470:
2471: sub modify_student_enrollment {
2472: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2473: # Get the course id from the environment
2474: my $cid='';
2475: unless ($cid=$ENV{'request.course.id'}) {
2476: return 'not_in_class';
2477: }
2478: # Make sure the user exists
2479: my $uhome=&homeserver($uname,$udom);
2480: if (($uhome eq '') || ($uhome eq 'no_host')) {
2481: return 'error: no such user';
2482: }
2483: #
2484: # Get student data if we were not given enough information
2485: if (!defined($first) || $first eq '' ||
2486: !defined($last) || $last eq '' ||
2487: !defined($uid) || $uid eq '' ||
2488: !defined($middle) || $middle eq '' ||
2489: !defined($gene) || $gene eq '') {
2490: # They did not supply us with enough data to enroll the student, so
2491: # we need to pick up more information.
2492: my %tmp = &get('environment',
2493: ['firstname','middlename','lastname', 'generation','id']
2494: ,$udom,$uname);
2495:
2496: foreach (keys(%tmp)) {
2497: &logthis("key $_ = ".$tmp{$_});
2498: }
2499: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2500: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2501: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
2502: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
2503: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2504: }
2505: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2506: $first,$middle);
2507: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2508: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2509: &escape($uname.':'.$udom).'='.
2510: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
2511: $ENV{'course.'.$cid.'.home'});
2512: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2513: return 'error: '.$reply;
2514: }
2515: # Add student role to user
2516: my $uurl='/'.$cid;
2517: $uurl=~s/\_/\//g;
2518: if ($usec) {
2519: $uurl.='/'.$usec;
2520: }
2521: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2522: }
2523:
2524: # ------------------------------------------------- Write to course preferences
2525:
2526: sub writecoursepref {
2527: my ($courseid,%prefs)=@_;
2528: $courseid=~s/^\///;
2529: $courseid=~s/\_/\//g;
2530: my ($cdomain,$cnum)=split(/\//,$courseid);
2531: my $chome=homeserver($cnum,$cdomain);
2532: if (($chome eq '') || ($chome eq 'no_host')) {
2533: return 'error: no such course';
2534: }
2535: my $cstring='';
2536: foreach (keys %prefs) {
2537: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2538: }
2539: $cstring=~s/\&$//;
2540: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2541: }
2542:
2543: # ---------------------------------------------------------- Make/modify course
2544:
2545: sub createcourse {
2546: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2547: $url=&declutter($url);
2548: my $cid='';
2549: unless (&allowed('ccc',$udom)) {
2550: return 'refused';
2551: }
2552: # ------------------------------------------------------------------- Create ID
2553: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2554: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2555: # ----------------------------------------------- Make sure that does not exist
2556: my $uhome=&homeserver($uname,$udom,'true');
2557: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2558: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2559: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2560: $uhome=&homeserver($uname,$udom,'true');
2561: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2562: return 'error: unable to generate unique course-ID';
2563: }
2564: }
2565: # ------------------------------------------------ Check supplied server name
2566: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2567: if (! exists($libserv{$course_server})) {
2568: return 'error:bad server name '.$course_server;
2569: }
2570: # ------------------------------------------------------------- Make the course
2571: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2572: $course_server);
2573: unless ($reply eq 'ok') { return 'error: '.$reply; }
2574: $uhome=&homeserver($uname,$udom,'true');
2575: if (($uhome eq '') || ($uhome eq 'no_host')) {
2576: return 'error: no such course';
2577: }
2578: # ----------------------------------------------------------------- Course made
2579: my $topurl=$url;
2580: unless ($nonstandard) {
2581: # ------------------------------------------ For standard courses, make top url
2582: my $mapurl=&clutter($url);
2583: if ($mapurl eq '/res/') { $mapurl=''; }
2584: $ENV{'form.initmap'}=(<<ENDINITMAP);
2585: <map>
2586: <resource id="1" type="start"></resource>
2587: <resource id="2" src="$mapurl"></resource>
2588: <resource id="3" type="finish"></resource>
2589: <link index="1" from="1" to="2"></link>
2590: <link index="2" from="2" to="3"></link>
2591: </map>
2592: ENDINITMAP
2593: $topurl=&declutter(
2594: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2595: );
2596: }
2597: # ----------------------------------------------------------- Write preferences
2598: &writecoursepref($udom.'_'.$uname,
2599: ('description' => $description,
2600: 'url' => $topurl));
2601: return '/'.$udom.'/'.$uname;
2602: }
2603:
2604: # ---------------------------------------------------------- Assign Custom Role
2605:
2606: sub assigncustomrole {
2607: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2608: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2609: $end,$start);
2610: }
2611:
2612: # ----------------------------------------------------------------- Revoke Role
2613:
2614: sub revokerole {
2615: my ($udom,$uname,$url,$role)=@_;
2616: my $now=time;
2617: return &assignrole($udom,$uname,$url,$role,$now);
2618: }
2619:
2620: # ---------------------------------------------------------- Revoke Custom Role
2621:
2622: sub revokecustomrole {
2623: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2624: my $now=time;
2625: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2626: }
2627:
2628: # ------------------------------------------------------------ Directory lister
2629:
2630: sub dirlist {
2631: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2632:
2633: $uri=~s/^\///;
2634: $uri=~s/\/$//;
2635: my ($udom, $uname);
2636: (undef,$udom,$uname)=split(/\//,$uri);
2637: if(defined($userdomain)) {
2638: $udom = $userdomain;
2639: }
2640: if(defined($username)) {
2641: $uname = $username;
2642: }
2643:
2644: my $dirRoot = $perlvar{'lonDocRoot'};
2645: if(defined($alternateDirectoryRoot)) {
2646: $dirRoot = $alternateDirectoryRoot;
2647: $dirRoot =~ s/\/$//;
2648: }
2649:
2650: if($udom) {
2651: if($uname) {
2652: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2653: homeserver($uname,$udom));
2654: return split(/:/,$listing);
2655: } elsif(!defined($alternateDirectoryRoot)) {
2656: my $tryserver;
2657: my %allusers=();
2658: foreach $tryserver (keys %libserv) {
2659: if($hostdom{$tryserver} eq $udom) {
2660: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2661: $udom, $tryserver);
2662: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2663: && ($listing ne 'con_lost')) {
2664: foreach (split(/:/,$listing)) {
2665: my ($entry,@stat)=split(/&/,$_);
2666: $allusers{$entry}=1;
2667: }
2668: }
2669: }
2670: }
2671: my $alluserstr='';
2672: foreach (sort keys %allusers) {
2673: $alluserstr.=$_.'&user:';
2674: }
2675: $alluserstr=~s/:$//;
2676: return split(/:/,$alluserstr);
2677: } else {
2678: my @emptyResults = ();
2679: push(@emptyResults, 'missing user name');
2680: return split(':',@emptyResults);
2681: }
2682: } elsif(!defined($alternateDirectoryRoot)) {
2683: my $tryserver;
2684: my %alldom=();
2685: foreach $tryserver (keys %libserv) {
2686: $alldom{$hostdom{$tryserver}}=1;
2687: }
2688: my $alldomstr='';
2689: foreach (sort keys %alldom) {
2690: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2691: }
2692: $alldomstr=~s/:$//;
2693: return split(/:/,$alldomstr);
2694: } else {
2695: my @emptyResults = ();
2696: push(@emptyResults, 'missing domain');
2697: return split(':',@emptyResults);
2698: }
2699: }
2700:
2701: # --------------------------------------------- GetFileTimestamp
2702: # This function utilizes dirlist and returns the date stamp for
2703: # when it was last modified. It will also return an error of -1
2704: # if an error occurs
2705:
2706: sub GetFileTimestamp {
2707: my ($studentDomain,$studentName,$filename,$root)=@_;
2708: $studentDomain=~s/\W//g;
2709: $studentName=~s/\W//g;
2710: my $subdir=$studentName.'__';
2711: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
2712: my $proname="$studentDomain/$subdir/$studentName";
2713: $proname .= '/'.$filename;
2714: my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
2715: $root);
2716: my $fileStat = $dir[0];
2717: my @stats = split('&', $fileStat);
2718: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
2719: return $stats[9];
2720: } else {
2721: return -1;
2722: }
2723: }
2724:
2725: # -------------------------------------------------------- Value of a Condition
2726:
2727: sub directcondval {
2728: my $number=shift;
2729: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2730: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2731: } else {
2732: return 2;
2733: }
2734: }
2735:
2736: sub condval {
2737: my $condidx=shift;
2738: my $result=0;
2739: my $allpathcond='';
2740: foreach (split(/\|/,$condidx)) {
2741: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2742: $allpathcond.=
2743: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2744: }
2745: }
2746: $allpathcond=~s/\|$//;
2747: if ($ENV{'request.course.id'}) {
2748: if ($allpathcond) {
2749: my $operand='|';
2750: my @stack;
2751: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2752: if ($_ eq '(') {
2753: push @stack,($operand,$result)
2754: } elsif ($_ eq ')') {
2755: my $before=pop @stack;
2756: if (pop @stack eq '&') {
2757: $result=$result>$before?$before:$result;
2758: } else {
2759: $result=$result>$before?$result:$before;
2760: }
2761: } elsif (($_ eq '&') || ($_ eq '|')) {
2762: $operand=$_;
2763: } else {
2764: my $new=directcondval($_);
2765: if ($operand eq '&') {
2766: $result=$result>$new?$new:$result;
2767: } else {
2768: $result=$result>$new?$result:$new;
2769: }
2770: }
2771: }
2772: }
2773: }
2774: return $result;
2775: }
2776:
2777: # ---------------------------------------------------- Devalidate courseresdata
2778:
2779: sub devalidatecourseresdata {
2780: my ($coursenum,$coursedomain)=@_;
2781: my $hashid=$coursenum.':'.$coursedomain;
2782: delete $courseresdatacache{$hashid.'.time'};
2783: }
2784:
2785: # --------------------------------------------------- Course Resourcedata Query
2786:
2787: sub courseresdata {
2788: my ($coursenum,$coursedomain,@which)=@_;
2789: my $coursehom=&homeserver($coursenum,$coursedomain);
2790: my $hashid=$coursenum.':'.$coursedomain;
2791: my $dodump=0;
2792: if (!defined($courseresdatacache{$hashid.'.time'})) {
2793: $dodump=1;
2794: } else {
2795: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2796: }
2797: if ($dodump) {
2798: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2799: my ($tmp) = keys(%dumpreply);
2800: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2801: $courseresdatacache{$hashid.'.time'}=time;
2802: $courseresdatacache{$hashid}=\%dumpreply;
2803: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
2804: return $tmp;
2805: }
2806: }
2807: foreach my $item (@which) {
2808: if (defined($courseresdatacache{$hashid}->{$item})) {
2809: return $courseresdatacache{$hashid}->{$item};
2810: }
2811: }
2812: return undef;
2813: }
2814:
2815: # --------------------------------------------------------- Value of a Variable
2816:
2817: sub EXT {
2818: my ($varname,$symbparm,$udom,$uname,)=@_;
2819:
2820: unless ($varname) { return ''; }
2821:
2822: #get real user name/domain, courseid and symb
2823: my $courseid;
2824: if (!($uname && $udom)) {
2825: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2826: if (!$symbparm) { $symbparm=$cursymb; }
2827: } else {
2828: $courseid=$ENV{'request.course.id'};
2829: }
2830: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2831: my $rest;
2832: if (defined($therest[0])) {
2833: $rest=join('.',@therest);
2834: } else {
2835: $rest='';
2836: }
2837:
2838: my $qualifierrest=$qualifier;
2839: if ($rest) { $qualifierrest.='.'.$rest; }
2840: my $spacequalifierrest=$space;
2841: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2842: if ($realm eq 'user') {
2843: # --------------------------------------------------------------- user.resource
2844: if ($space eq 'resource') {
2845: my %restored=&restore(undef,undef,$udom,$uname);
2846: return $restored{$qualifierrest};
2847: # ----------------------------------------------------------------- user.access
2848: } elsif ($space eq 'access') {
2849: # FIXME - not supporting calls for a specific user
2850: return &allowed($qualifier,$rest);
2851: # ------------------------------------------ user.preferences, user.environment
2852: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2853: if (($uname eq $ENV{'user.name'}) &&
2854: ($udom eq $ENV{'user.domain'})) {
2855: return $ENV{join('.',('environment',$qualifierrest))};
2856: } else {
2857: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2858: return $returnhash{$qualifierrest};
2859: }
2860: # ----------------------------------------------------------------- user.course
2861: } elsif ($space eq 'course') {
2862: # FIXME - not supporting calls for a specific user
2863: return $ENV{join('.',('request.course',$qualifier))};
2864: # ------------------------------------------------------------------- user.role
2865: } elsif ($space eq 'role') {
2866: # FIXME - not supporting calls for a specific user
2867: my ($role,$where)=split(/\./,$ENV{'request.role'});
2868: if ($qualifier eq 'value') {
2869: return $role;
2870: } elsif ($qualifier eq 'extent') {
2871: return $where;
2872: }
2873: # ----------------------------------------------------------------- user.domain
2874: } elsif ($space eq 'domain') {
2875: return $udom;
2876: # ------------------------------------------------------------------- user.name
2877: } elsif ($space eq 'name') {
2878: return $uname;
2879: # ---------------------------------------------------- Any other user namespace
2880: } else {
2881: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2882: my %reply=&get($space,[$item]);
2883: return $reply{$item};
2884: }
2885: } elsif ($realm eq 'query') {
2886: # ---------------------------------------------- pull stuff out of query string
2887: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
2888: return $ENV{'form.'.$space};
2889: } elsif ($realm eq 'request') {
2890: # ------------------------------------------------------------- request.browser
2891: if ($space eq 'browser') {
2892: return $ENV{'browser.'.$qualifier};
2893: # ------------------------------------------------------------ request.filename
2894: } else {
2895: return $ENV{'request.'.$spacequalifierrest};
2896: }
2897: } elsif ($realm eq 'course') {
2898: # ---------------------------------------------------------- course.description
2899: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
2900: } elsif ($realm eq 'resource') {
2901:
2902: if ($courseid eq $ENV{'request.course.id'}) {
2903:
2904: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2905:
2906: # ----------------------------------------------------- Cascading lookup scheme
2907: if (!$symbparm) { $symbparm=&symbread(); }
2908: my $symbp=$symbparm;
2909: my $mapp=(split(/\_\_\_/,$symbp))[0];
2910:
2911: my $symbparm=$symbp.'.'.$spacequalifierrest;
2912: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2913:
2914: my $section;
2915: if (($ENV{'user.name'} eq $uname) &&
2916: ($ENV{'user.domain'} eq $udom)) {
2917: $section=$ENV{'request.course.sec'};
2918: } else {
2919: $section=&usection($udom,$uname,$courseid);
2920: }
2921:
2922: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
2923: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
2924: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
2925:
2926: my $courselevel=$courseid.'.'.$spacequalifierrest;
2927: my $courselevelr=$courseid.'.'.$symbparm;
2928: my $courselevelm=$courseid.'.'.$mapparm;
2929:
2930: # ----------------------------------------------------------- first, check user
2931: #most student don't have any data set, check if there is some data
2932: #every thirty minutes
2933: if (!
2934: (exists($ENV{'cache.studentresdata'})
2935: && (($ENV{'cache.studentresdata'}+1800) > time))) {
2936: my %resourcedata=&get('resourcedata',
2937: [$courselevelr,$courselevelm,$courselevel],
2938: $udom,$uname);
2939: my ($tmp)=keys(%resourcedata);
2940: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
2941: if ($resourcedata{$courselevelr}) {
2942: return $resourcedata{$courselevelr}; }
2943: if ($resourcedata{$courselevelm}) {
2944: return $resourcedata{$courselevelm}; }
2945: if ($resourcedata{$courselevel}) {
2946: return $resourcedata{$courselevel}; }
2947: } else {
2948: if ($tmp!~/No such file/) {
2949: &logthis("<font color=blue>WARNING:".
2950: " Trying to get resource data for ".
2951: $uname." at ".$udom.": ".
2952: $tmp."</font>");
2953: } elsif ($tmp=~/error:No such file/) {
2954: $ENV{'cache.studentresdata'}=time;
2955: &appenv(('cache.studentresdata'=>
2956: $ENV{'cache.studentresdata'}));
2957: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
2958: return $tmp;
2959: }
2960: }
2961: }
2962:
2963: # -------------------------------------------------------- second, check course
2964:
2965: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
2966: $ENV{'course.'.$courseid.'.domain'},
2967: ($seclevelr,$seclevelm,$seclevel,
2968: $courselevelr,$courselevelm,
2969: $courselevel));
2970: if (defined($coursereply)) { return $coursereply; }
2971:
2972: # ------------------------------------------------------ third, check map parms
2973: my %parmhash=();
2974: my $thisparm='';
2975: if (tie(%parmhash,'GDBM_File',
2976: $ENV{'request.course.fn'}.'_parms.db',
2977: &GDBM_READER(),0640)) {
2978: $thisparm=$parmhash{$symbparm};
2979: untie(%parmhash);
2980: }
2981: if ($thisparm) { return $thisparm; }
2982: }
2983: # --------------------------------------------- last, look in resource metadata
2984:
2985: $spacequalifierrest=~s/\./\_/;
2986: my $filename;
2987: if (!$symbparm) { $symbparm=&symbread(); }
2988: if ($symbparm) {
2989: $filename=(split(/\_\_\_/,$symbparm))[2];
2990: } else {
2991: $filename=$ENV{'request.filename'};
2992: }
2993: my $metadata=&metadata($filename,$spacequalifierrest);
2994: if (defined($metadata)) { return $metadata; }
2995: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
2996: if (defined($metadata)) { return $metadata; }
2997:
2998: # ------------------------------------------------------------------ Cascade up
2999: unless ($space eq '0') {
3000: my ($part,$id)=split(/\_/,$space);
3001: if ($id) {
3002: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3003: $symbparm,$udom,$uname);
3004: if (defined($partgeneral)) { return $partgeneral; }
3005: } else {
3006: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
3007: $symbparm,$udom,$uname);
3008: if (defined($resourcegeneral)) { return $resourcegeneral; }
3009: }
3010: }
3011:
3012: # ---------------------------------------------------- Any other user namespace
3013: } elsif ($realm eq 'environment') {
3014: # ----------------------------------------------------------------- environment
3015: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3016: return $ENV{'environment.'.$spacequalifierrest};
3017: } else {
3018: my %returnhash=&userenvironment($udom,$uname,
3019: $spacequalifierrest);
3020: return $returnhash{$spacequalifierrest};
3021: }
3022: } elsif ($realm eq 'system') {
3023: # ----------------------------------------------------------------- system.time
3024: if ($space eq 'time') {
3025: return time;
3026: }
3027: }
3028: return '';
3029: }
3030:
3031: # ---------------------------------------------------------------- Get metadata
3032:
3033: sub metadata {
3034: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3035:
3036: $uri=&declutter($uri);
3037: # if it is a non metadata possible uri return quickly
3038: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3039: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
3040: return '';
3041: }
3042: my $filename=$uri;
3043: $uri=~s/\.meta$//;
3044: #
3045: # Is the metadata already cached?
3046: # Look at timestamp of caching
3047: # Everything is cached by the main uri, libraries are never directly cached
3048: #
3049: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3050: #
3051: # Is this a recursive call for a library?
3052: #
3053: if ($liburi) {
3054: $liburi=&declutter($liburi);
3055: $filename=$liburi;
3056: }
3057: my %metathesekeys=();
3058: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3059: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
3060: my $parser=HTML::LCParser->new(\$metastring);
3061: my $token;
3062: undef %metathesekeys;
3063: while ($token=$parser->get_token) {
3064: if ($token->[0] eq 'S') {
3065: if (defined($token->[2]->{'package'})) {
3066: #
3067: # This is a package - get package info
3068: #
3069: my $package=$token->[2]->{'package'};
3070: my $keyroot='';
3071: if ($prefix) {
3072: $keyroot.=$prefix;
3073: } else {
3074: if (defined($token->[2]->{'part'})) {
3075: $keyroot.='_'.$token->[2]->{'part'};
3076: }
3077: }
3078: if (defined($token->[2]->{'id'})) {
3079: $keyroot.='_'.$token->[2]->{'id'};
3080: }
3081: if ($metacache{$uri.':packages'}) {
3082: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3083: } else {
3084: $metacache{$uri.':packages'}=$package.$keyroot;
3085: }
3086: foreach (keys %packagetab) {
3087: if ($_=~/^$package\&/) {
3088: my ($pack,$name,$subp)=split(/\&/,$_);
3089: my $value=$packagetab{$_};
3090: my $part=$keyroot;
3091: $part=~s/^\_//;
3092: if ($subp eq 'display') {
3093: $value.=' [Part: '.$part.']';
3094: }
3095: my $unikey='parameter'.$keyroot.'_'.$name;
3096: $metathesekeys{$unikey}=1;
3097: $metacache{$uri.':'.$unikey.'.part'}=$part;
3098: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3099: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3100: }
3101: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3102: $metacache{$uri.':'.$unikey}=
3103: $metacache{$uri.':'.$unikey.'.default'}
3104: }
3105: }
3106: }
3107: } else {
3108: #
3109: # This is not a package - some other kind of start tag
3110: #
3111: my $entry=$token->[1];
3112: my $unikey;
3113: if ($entry eq 'import') {
3114: $unikey='';
3115: } else {
3116: $unikey=$entry;
3117: }
3118: if ($prefix) {
3119: $unikey.=$prefix;
3120: } else {
3121: if (defined($token->[2]->{'part'})) {
3122: $unikey.='_'.$token->[2]->{'part'};
3123: }
3124: }
3125: if (defined($token->[2]->{'id'})) {
3126: $unikey.='_'.$token->[2]->{'id'};
3127: }
3128:
3129: if ($entry eq 'import') {
3130: #
3131: # Importing a library here
3132: #
3133: if ($depthcount<20) {
3134: my $location=$parser->get_text('/import');
3135: my $dir=$filename;
3136: $dir=~s|[^/]*$||;
3137: $location=&filelocation($dir,$location);
3138: foreach (sort(split(/\,/,&metadata($uri,'keys',
3139: $location,$unikey,
3140: $depthcount+1)))) {
3141: $metathesekeys{$_}=1;
3142: }
3143: }
3144: } else {
3145:
3146: if (defined($token->[2]->{'name'})) {
3147: $unikey.='_'.$token->[2]->{'name'};
3148: }
3149: $metathesekeys{$unikey}=1;
3150: foreach (@{$token->[3]}) {
3151: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3152: }
3153: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3154: my $default=$metacache{$uri.':'.$unikey.'.default'};
3155: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3156: # only ws inside the tag, and not in default, so use default
3157: # as value
3158: $metacache{$uri.':'.$unikey}=$default;
3159: } else {
3160: # either something interesting inside the tag or default
3161: # uninteresting
3162: $metacache{$uri.':'.$unikey}=$internaltext;
3163: }
3164: # end of not-a-package not-a-library import
3165: }
3166: # end of not-a-package start tag
3167: }
3168: # the next is the end of "start tag"
3169: }
3170: }
3171: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3172: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3173: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3174: $metacache{$uri.':cachedtimestamp'}=time;
3175: # this is the end of "was not already recently cached
3176: }
3177: return $metacache{$uri.':'.$what};
3178: }
3179:
3180: sub metadata_generate_part0 {
3181: my ($metadata,$metacache,$uri) = @_;
3182: my %allnames;
3183: foreach my $metakey (sort keys %$metadata) {
3184: if ($metakey=~/^parameter\_(.*)/) {
3185: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3186: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3187: if (! exists($$metadata{'parameter_0_'.$name})) {
3188: $allnames{$name}=$part;
3189: }
3190: }
3191: }
3192: foreach my $name (keys(%allnames)) {
3193: $$metadata{"parameter_0_$name"}=1;
3194: my $key="$uri:parameter_0_$name";
3195: $$metacache{"$key.part"}='0';
3196: $$metacache{"$key.name"}=$name;
3197: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3198: $allnames{$name}.'_'.$name.
3199: '.type'};
3200: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3201: '.display'};
3202: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3203: $olddis=~s/$expr/\[Part: 0\]/;
3204: $$metacache{"$key.display"}=$olddis;
3205: }
3206: }
3207:
3208: # ------------------------------------------------- Get the title of a resource
3209:
3210: sub gettitle {
3211: my $urlsymb=shift;
3212: my $symb=&symbread($urlsymb);
3213: unless ($symb) {
3214: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3215: return &metadata($urlsymb,'title');
3216: }
3217: if ($titlecache{$symb}) { return $titlecache{$symb}; }
3218: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3219: my $title='';
3220: my %bighash;
3221: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3222: &GDBM_READER(),0640)) {
3223: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3224: $title=$bighash{'title_'.$mapid.'.'.$resid};
3225: untie %bighash;
3226: }
3227: if ($title) {
3228: $titlecache{$symb}=$title;
3229: return $title;
3230: } else {
3231: return &metadata($urlsymb,'title');
3232: }
3233: }
3234:
3235: # ------------------------------------------------- Update symbolic store links
3236:
3237: sub symblist {
3238: my ($mapname,%newhash)=@_;
3239: $mapname=declutter($mapname);
3240: my %hash;
3241: if (($ENV{'request.course.fn'}) && (%newhash)) {
3242: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3243: &GDBM_WRCREAT(),0640)) {
3244: foreach (keys %newhash) {
3245: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3246: }
3247: if (untie(%hash)) {
3248: return 'ok';
3249: }
3250: }
3251: }
3252: return 'error';
3253: }
3254:
3255: # --------------------------------------------------------------- Verify a symb
3256:
3257: sub symbverify {
3258: my ($symb,$thisfn)=@_;
3259: $thisfn=&declutter($thisfn);
3260: # direct jump to resource in page or to a sequence - will construct own symbs
3261: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3262: # check URL part
3263: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3264: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3265:
3266: $symb=&symbclean($symb);
3267:
3268: my %bighash;
3269: my $okay=0;
3270: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3271: &GDBM_READER(),0640)) {
3272: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3273: unless ($ids) {
3274: $ids=$bighash{'ids_/'.$thisfn};
3275: }
3276: if ($ids) {
3277: # ------------------------------------------------------------------- Has ID(s)
3278: foreach (split(/\,/,$ids)) {
3279: my ($mapid,$resid)=split(/\./,$_);
3280: if (
3281: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3282: eq $symb) {
3283: $okay=1;
3284: }
3285: }
3286: }
3287: untie(%bighash);
3288: }
3289: return $okay;
3290: }
3291:
3292: # --------------------------------------------------------------- Clean-up symb
3293:
3294: sub symbclean {
3295: my $symb=shift;
3296:
3297: # remove version from map
3298: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3299:
3300: # remove version from URL
3301: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3302:
3303: return $symb;
3304: }
3305:
3306: # ------------------------------------------------------ Return symb list entry
3307:
3308: sub symbread {
3309: my ($thisfn,$donotrecurse)=@_;
3310: # no filename provided? try from environment
3311: unless ($thisfn) {
3312: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3313: $thisfn=$ENV{'request.filename'};
3314: }
3315: # is that filename actually a symb? Verify, clean, and return
3316: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3317: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3318: }
3319: $thisfn=declutter($thisfn);
3320: my %hash;
3321: my %bighash;
3322: my $syval='';
3323: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3324: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3325: &GDBM_READER(),0640)) {
3326: $syval=$hash{$thisfn};
3327: untie(%hash);
3328: }
3329: # ---------------------------------------------------------- There was an entry
3330: if ($syval) {
3331: unless ($syval=~/\_\d+$/) {
3332: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3333: &appenv('request.ambiguous' => $thisfn);
3334: return '';
3335: }
3336: $syval.=$1;
3337: }
3338: } else {
3339: # ------------------------------------------------------- Was not in symb table
3340: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3341: &GDBM_READER(),0640)) {
3342: # ---------------------------------------------- Get ID(s) for current resource
3343: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3344: unless ($ids) {
3345: $ids=$bighash{'ids_/'.$thisfn};
3346: }
3347: unless ($ids) {
3348: # alias?
3349: $ids=$bighash{'mapalias_'.$thisfn};
3350: }
3351: if ($ids) {
3352: # ------------------------------------------------------------------- Has ID(s)
3353: my @possibilities=split(/\,/,$ids);
3354: if ($#possibilities==0) {
3355: # ----------------------------------------------- There is only one possibility
3356: my ($mapid,$resid)=split(/\./,$ids);
3357: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3358: } elsif (!$donotrecurse) {
3359: # ------------------------------------------ There is more than one possibility
3360: my $realpossible=0;
3361: foreach (@possibilities) {
3362: my $file=$bighash{'src_'.$_};
3363: if (&allowed('bre',$file)) {
3364: my ($mapid,$resid)=split(/\./,$_);
3365: if ($bighash{'map_type_'.$mapid} ne 'page') {
3366: $realpossible++;
3367: $syval=declutter($bighash{'map_id_'.$mapid}).
3368: '___'.$resid;
3369: }
3370: }
3371: }
3372: if ($realpossible!=1) { $syval=''; }
3373: } else {
3374: $syval='';
3375: }
3376: }
3377: untie(%bighash)
3378: }
3379: }
3380: if ($syval) {
3381: return &symbclean($syval.'___'.$thisfn);
3382: }
3383: }
3384: &appenv('request.ambiguous' => $thisfn);
3385: return '';
3386: }
3387:
3388: # ---------------------------------------------------------- Return random seed
3389:
3390: sub numval {
3391: my $txt=shift;
3392: $txt=~tr/A-J/0-9/;
3393: $txt=~tr/a-j/0-9/;
3394: $txt=~tr/K-T/0-9/;
3395: $txt=~tr/k-t/0-9/;
3396: $txt=~tr/U-Z/0-5/;
3397: $txt=~tr/u-z/0-5/;
3398: $txt=~s/\D//g;
3399: return int($txt);
3400: }
3401:
3402: sub rndseed {
3403: my ($symb,$courseid,$domain,$username)=@_;
3404: if (!$symb) {
3405: unless ($symb=&symbread()) { return time; }
3406: }
3407: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3408: if (!$domain) {$domain=$ENV{'user.domain'};}
3409: if (!$username) {$username=$ENV{'user.name'};}
3410: {
3411: use integer;
3412: my $symbchck=unpack("%32C*",$symb) << 27;
3413: my $symbseed=numval($symb) << 22;
3414: my $namechck=unpack("%32C*",$username) << 17;
3415: my $nameseed=numval($username) << 12;
3416: my $domainseed=unpack("%32C*",$domain) << 7;
3417: my $courseseed=unpack("%32C*",$courseid);
3418: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3419: #uncommenting these lines can break things!
3420: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3421: #&Apache::lonxml::debug("rndseed :$num:$symb");
3422: return $num;
3423: }
3424: }
3425:
3426: sub ireceipt {
3427: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3428: my $cuname=unpack("%32C*",$funame);
3429: my $cudom=unpack("%32C*",$fudom);
3430: my $cucourseid=unpack("%32C*",$fucourseid);
3431: my $cusymb=unpack("%32C*",$fusymb);
3432: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3433: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3434: ($cunique%$cuname+
3435: $cunique%$cudom+
3436: $cusymb%$cuname+
3437: $cusymb%$cudom+
3438: $cucourseid%$cuname+
3439: $cucourseid%$cudom);
3440: }
3441:
3442: sub receipt {
3443: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3444: return &ireceipt($name,$domain,$courseid,$symb);
3445: }
3446:
3447: # ------------------------------------------------------------ Serves up a file
3448: # returns either the contents of the file or a -1
3449: sub getfile {
3450: my $file=shift;
3451: if ($file=~/^\/*uploaded\//) { # user file
3452: my $ua=new LWP::UserAgent;
3453: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3454: my $response=$ua->request($request);
3455: if ($response->is_success()) {
3456: return $response->content;
3457: } else {
3458: return -1;
3459: }
3460: } else { # normal file from res space
3461: &repcopy($file);
3462: if (! -e $file ) { return -1; };
3463: my $fh=Apache::File->new($file);
3464: my $a='';
3465: while (<$fh>) { $a .=$_; }
3466: return $a;
3467: }
3468: }
3469:
3470: sub filelocation {
3471: my ($dir,$file) = @_;
3472: my $location;
3473: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3474: if ($file=~m:^/~:) { # is a contruction space reference
3475: $location = $file;
3476: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3477: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3478: $location=$file;
3479: } else {
3480: $file=~s/^$perlvar{'lonDocRoot'}//;
3481: $file=~s:^/*res::;
3482: if ( !( $file =~ m:^/:) ) {
3483: $location = $dir. '/'.$file;
3484: } else {
3485: $location = '/home/httpd/html/res'.$file;
3486: }
3487: }
3488: $location=~s://+:/:g; # remove duplicate /
3489: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3490: return $location;
3491: }
3492:
3493: sub hreflocation {
3494: my ($dir,$file)=@_;
3495: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3496: my $finalpath=filelocation($dir,$file);
3497: $finalpath=~s/^\/home\/httpd\/html//;
3498: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3499: return $finalpath;
3500: } else {
3501: return $file;
3502: }
3503: }
3504:
3505: # ------------------------------------------------------------- Declutters URLs
3506:
3507: sub declutter {
3508: my $thisfn=shift;
3509: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3510: $thisfn=~s/^\///;
3511: $thisfn=~s/^res\///;
3512: $thisfn=~s/\?.+$//;
3513: return $thisfn;
3514: }
3515:
3516: # ------------------------------------------------------------- Clutter up URLs
3517:
3518: sub clutter {
3519: my $thisfn='/'.&declutter(shift);
3520: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3521: $thisfn='/res'.$thisfn;
3522: }
3523: return $thisfn;
3524: }
3525:
3526: # -------------------------------------------------------- Escape Special Chars
3527:
3528: sub escape {
3529: my $str=shift;
3530: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3531: return $str;
3532: }
3533:
3534: # ----------------------------------------------------- Un-Escape Special Chars
3535:
3536: sub unescape {
3537: my $str=shift;
3538: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3539: return $str;
3540: }
3541:
3542: # ================================================================ Main Program
3543:
3544: sub goodbye {
3545: &logthis("Starting Shut down");
3546: &flushcourselogs();
3547: &logthis("Shutting down");
3548: }
3549:
3550: BEGIN {
3551: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3552: unless ($readit) {
3553: {
3554: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3555:
3556: while (my $configline=<$config>) {
3557: if ($configline =~ /^[^\#]*PerlSetVar/) {
3558: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3559: chomp($varvalue);
3560: $perlvar{$varname}=$varvalue;
3561: }
3562: }
3563: }
3564: {
3565: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3566:
3567: while (my $configline=<$config>) {
3568: if ($configline =~ /^[^\#]*PerlSetVar/) {
3569: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3570: chomp($varvalue);
3571: $perlvar{$varname}=$varvalue;
3572: }
3573: }
3574: }
3575:
3576: # ------------------------------------------------------------ Read domain file
3577: {
3578: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
3579: '/domain.tab');
3580: %domaindescription = ();
3581: %domain_auth_def = ();
3582: %domain_auth_arg_def = ();
3583: if ($fh) {
3584: while (<$fh>) {
3585: next if /^\#/;
3586: chomp;
3587: my ($domain, $domain_description, $def_auth, $def_auth_arg)
3588: = split(/:/,$_,4);
3589: $domain_auth_def{$domain}=$def_auth;
3590: $domain_auth_arg_def{$domain}=$def_auth_arg;
3591: $domaindescription{$domain}=$domain_description;
3592: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
3593: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
3594: }
3595: }
3596: }
3597:
3598:
3599: # ------------------------------------------------------------- Read hosts file
3600: {
3601: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3602:
3603: while (my $configline=<$config>) {
3604: next if ($configline =~ /^(\#|\s*$)/);
3605: chomp($configline);
3606: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3607: if ($id && $domain && $role && $name && $ip) {
3608: $hostname{$id}=$name;
3609: $hostdom{$id}=$domain;
3610: $hostip{$id}=$ip;
3611: $iphost{$ip}=$id;
3612: if ($role eq 'library') { $libserv{$id}=$name; }
3613: } else {
3614: if ($configline) {
3615: &logthis("Skipping hosts.tab line -$configline-");
3616: }
3617: }
3618: }
3619: }
3620:
3621: # ------------------------------------------------------ Read spare server file
3622: {
3623: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3624:
3625: while (my $configline=<$config>) {
3626: chomp($configline);
3627: if ($configline) {
3628: $spareid{$configline}=1;
3629: }
3630: }
3631: }
3632: # ------------------------------------------------------------ Read permissions
3633: {
3634: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3635:
3636: while (my $configline=<$config>) {
3637: chomp($configline);
3638: if ($configline) {
3639: my ($role,$perm)=split(/ /,$configline);
3640: if ($perm ne '') { $pr{$role}=$perm; }
3641: }
3642: }
3643: }
3644:
3645: # -------------------------------------------- Read plain texts for permissions
3646: {
3647: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3648:
3649: while (my $configline=<$config>) {
3650: chomp($configline);
3651: if ($configline) {
3652: my ($short,$plain)=split(/:/,$configline);
3653: if ($plain ne '') { $prp{$short}=$plain; }
3654: }
3655: }
3656: }
3657:
3658: # ---------------------------------------------------------- Read package table
3659: {
3660: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3661:
3662: while (my $configline=<$config>) {
3663: chomp($configline);
3664: my ($short,$plain)=split(/:/,$configline);
3665: my ($pack,$name)=split(/\&/,$short);
3666: if ($plain ne '') {
3667: $packagetab{$pack.'&'.$name.'&name'}=$name;
3668: $packagetab{$short}=$plain;
3669: }
3670: }
3671: }
3672:
3673: # ------------- set up temporary directory
3674: {
3675: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
3676:
3677: }
3678:
3679: %metacache=();
3680:
3681: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
3682: $dumpcount=0;
3683:
3684: &logtouch();
3685: &logthis('<font color=yellow>INFO: Read configuration</font>');
3686: $readit=1;
3687: }
3688: }
3689:
3690: 1;
3691: __END__
3692:
3693: =pod
3694:
3695: =head1 NAME
3696:
3697: Apache::lonnet - Subroutines to ask questions about things in the network.
3698:
3699: =head1 SYNOPSIS
3700:
3701: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3702:
3703: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3704:
3705: Common parameters:
3706:
3707: =over 4
3708:
3709: =item *
3710:
3711: $uname : an internal username (if $cname expecting a course Id specifically)
3712:
3713: =item *
3714:
3715: $udom : a domain (if $cdom expecting a course's domain specifically)
3716:
3717: =item *
3718:
3719: $symb : a resource instance identifier
3720:
3721: =item *
3722:
3723: $namespace : the name of a .db file that contains the data needed or
3724: being set.
3725:
3726: =back
3727:
3728: =head1 INTRODUCTION
3729:
3730: This module provides subroutines which interact with the
3731: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3732: - classes
3733: - users
3734: - resources
3735:
3736: For many of these objects you can also use this to store data about
3737: them or modify them in various ways.
3738:
3739: This is part of the LearningOnline Network with CAPA project
3740: described at http://www.lon-capa.org.
3741:
3742: =head1 RETURN MESSAGES
3743:
3744: =over 4
3745:
3746: =item *
3747:
3748: con_lost : unable to contact remote host
3749:
3750: =item *
3751:
3752: con_delayed : unable to contact remote host, message will be delivered
3753: when the connection is brought back up
3754:
3755: =item *
3756:
3757: con_failed : unable to contact remote host and unable to save message
3758: for later delivery
3759:
3760: =item *
3761:
3762: error: : an error a occured, a description of the error follows the :
3763:
3764: =item *
3765:
3766: no_such_host : unable to fund a host associated with the user/domain
3767: that was requested
3768:
3769: =back
3770:
3771: =head1 PUBLIC SUBROUTINES
3772:
3773: =head2 Session Environment Functions
3774:
3775: =over 4
3776:
3777: =item *
3778:
3779: appenv(%hash) : the value of %hash is written to the user envirnoment
3780: file, and will be restored for each access this user makes during this
3781: session, also modifies the %ENV for the current process
3782:
3783: =item *
3784:
3785: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3786:
3787: =back
3788:
3789: =head2 User Information
3790:
3791: =over 4
3792:
3793: =item *
3794:
3795: queryauthenticate($uname,$udom) : try to determine user's current
3796: authentication scheme
3797:
3798: =item *
3799:
3800: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3801: servers (first use the current one), $upass should be the users password
3802:
3803: =item *
3804:
3805: homeserver($uname,$udom) : find the server which has the user's
3806: directory and files (there must be only one), this caches the answer,
3807: and also caches if there is a borken connection.
3808:
3809: =item *
3810:
3811: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3812: unique resource in a domain, there must be only 1 ID per username, and
3813: only 1 username per ID in a specific domain) (returns hash:
3814: id=>name,id=>name)
3815:
3816: =item *
3817:
3818: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3819: name=>id,name=>id)
3820:
3821: =item *
3822:
3823: idput($udom,%ids) : store away a list of names and associated IDs
3824:
3825: =item *
3826:
3827: rolesinit($udom,$username,$authhost) : get user privileges
3828:
3829: =item *
3830:
3831: usection($udom,$uname,$cname) : finds the section of student in the
3832: course $cname, return section name/number or '' for "not in course"
3833: and '-1' for "no section"
3834:
3835: =item *
3836:
3837: userenvironment($udom,$uname,@what) : gets the values of the keys
3838: passed in @what from the requested user's environment, returns a hash
3839:
3840: =back
3841:
3842: =head2 User Roles
3843:
3844: =over 4
3845:
3846: =item *
3847:
3848: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
3849: actions
3850: F: full access
3851: U,I,K: authentication modes (cxx only)
3852: '': forbidden
3853: 1: user needs to choose course
3854: 2: browse allowed
3855:
3856: =item *
3857:
3858: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
3859: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
3860: and course level
3861:
3862: =item *
3863:
3864: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
3865: explanation of a user role term
3866:
3867: =back
3868:
3869: =head2 User Modification
3870:
3871: =over 4
3872:
3873: =item *
3874:
3875: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
3876: user for the level given by URL. Optional start and end dates (leave empty
3877: string or zero for "no date")
3878:
3879: =item *
3880:
3881: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
3882: change a users, password, possible return values are: ok,
3883: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
3884: refused
3885:
3886: =item *
3887:
3888: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
3889:
3890: =item *
3891:
3892: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
3893: modify user
3894:
3895: =item *
3896:
3897: modifystudent
3898:
3899: modify a students enrollment and identification information.
3900: The course id is resolved based on the current users environment.
3901: This means the envoking user must be a course coordinator or otherwise
3902: associated with a course.
3903:
3904: This call is essentially a wrapper for lonnet::modifyuser and
3905: lonnet::modify_student_enrollment
3906:
3907: Inputs:
3908:
3909: =over 4
3910:
3911: =item B<$udom> Students loncapa domain
3912:
3913: =item B<$uname> Students loncapa login name
3914:
3915: =item B<$uid> Students id/student number
3916:
3917: =item B<$umode> Students authentication mode
3918:
3919: =item B<$upass> Students password
3920:
3921: =item B<$first> Students first name
3922:
3923: =item B<$middle> Students middle name
3924:
3925: =item B<$last> Students last name
3926:
3927: =item B<$gene> Students generation
3928:
3929: =item B<$usec> Students section in course
3930:
3931: =item B<$end> Unix time of the roles expiration
3932:
3933: =item B<$start> Unix time of the roles start date
3934:
3935: =item B<$forceid> If defined, allow $uid to be changed
3936:
3937: =item B<$desiredhome> server to use as home server for student
3938:
3939: =back
3940:
3941: =item *
3942:
3943: modify_student_enrollment
3944:
3945: Change a students enrollment status in a class. The environment variable
3946: 'role.request.course' must be defined for this function to proceed.
3947:
3948: Inputs:
3949:
3950: =over 4
3951:
3952: =item $udom, students domain
3953:
3954: =item $uname, students name
3955:
3956: =item $uid, students user id
3957:
3958: =item $first, students first name
3959:
3960: =item $middle
3961:
3962: =item $last
3963:
3964: =item $gene
3965:
3966: =item $usec
3967:
3968: =item $end
3969:
3970: =item $start
3971:
3972: =back
3973:
3974:
3975: =item *
3976:
3977: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
3978: custom role; give a custom role to a user for the level given by URL. Specify
3979: name and domain of role author, and role name
3980:
3981: =item *
3982:
3983: revokerole($udom,$uname,$url,$role) : revoke a role for url
3984:
3985: =item *
3986:
3987: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
3988:
3989: =back
3990:
3991: =head2 Course Infomation
3992:
3993: =over 4
3994:
3995: =item *
3996:
3997: coursedescription($courseid) : course description
3998:
3999: =item *
4000:
4001: courseresdata($coursenum,$coursedomain,@which) : request for current
4002: parameter setting for a specific course, @what should be a list of
4003: parameters to ask about. This routine caches answers for 5 minutes.
4004:
4005: =back
4006:
4007: =head2 Course Modification
4008:
4009: =over 4
4010:
4011: =item *
4012:
4013: writecoursepref($courseid,%prefs) : write preferences (environment
4014: database) for a course
4015:
4016: =item *
4017:
4018: createcourse($udom,$description,$url) : make/modify course
4019:
4020: =back
4021:
4022: =head2 Resource Subroutines
4023:
4024: =over 4
4025:
4026: =item *
4027:
4028: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
4029:
4030: =item *
4031:
4032: repcopy($filename) : subscribes to the requested file, and attempts to
4033: replicate from the owning library server, Might return
4034: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4035: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4036: resource. Expects the local filesystem pathname
4037: (/home/httpd/html/res/....)
4038:
4039: =back
4040:
4041: =head2 Resource Information
4042:
4043: =over 4
4044:
4045: =item *
4046:
4047: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4048: a vairety of different possible values, $varname should be a request
4049: string, and the other parameters can be used to specify who and what
4050: one is asking about.
4051:
4052: Possible values for $varname are environment.lastname (or other item
4053: from the envirnment hash), user.name (or someother aspect about the
4054: user), resource.0.maxtries (or some other part and parameter of a
4055: resource)
4056:
4057: =item *
4058:
4059: directcondval($number) : get current value of a condition; reads from a state
4060: string
4061:
4062: =item *
4063:
4064: condval($condidx) : value of condition index based on state
4065:
4066: =item *
4067:
4068: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4069: resource's metadata, $what should be either a specific key, or either
4070: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4071: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4072:
4073: this function automatically caches all requests
4074:
4075: =item *
4076:
4077: metadata_query($query,$custom,$customshow) : make a metadata query against the
4078: network of library servers; returns file handle of where SQL and regex results
4079: will be stored for query
4080:
4081: =item *
4082:
4083: symbread($filename) : return symbolic list entry (filename argument optional);
4084: returns the data handle
4085:
4086: =item *
4087:
4088: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4089: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4090: failure, user must be in a course, as it assumes the existance of the
4091: course initi hash, and uses $ENV('request.course.id'}
4092:
4093:
4094: =item *
4095:
4096: symbclean($symb) : removes versions numbers from a symb, returns the
4097: cleaned symb
4098:
4099: =item *
4100:
4101: is_on_map($uri) : checks if the $uri is somewhere on the current
4102: course map, user must be in a course for it to work.
4103:
4104: =item *
4105:
4106: numval($salt) : return random seed value (addend for rndseed)
4107:
4108: =item *
4109:
4110: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4111: a random seed, all arguments are optional, if they aren't sent it uses the
4112: environment to derive them. Note: if symb isn't sent and it can't get one
4113: from &symbread it will use the current time as its return value
4114:
4115: =item *
4116:
4117: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4118: unfakeable, receipt
4119:
4120: =item *
4121:
4122: receipt() : API to ireceipt working off of ENV values; given out to users
4123:
4124: =item *
4125:
4126: countacc($url) : count the number of accesses to a given URL
4127:
4128: =item *
4129:
4130: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4131:
4132: =item *
4133:
4134: checkin($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 $tcrsid)
4135:
4136: =item *
4137:
4138: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4139:
4140: =item *
4141:
4142: devalidate($symb) : devalidate temporary spreadsheet calculations,
4143: forcing spreadsheet to reevaluate the resource scores next time.
4144:
4145: =back
4146:
4147: =head2 Storing/Retreiving Data
4148:
4149: =over 4
4150:
4151: =item *
4152:
4153: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4154: for this url; hashref needs to be given and should be a \%hashname; the
4155: remaining args aren't required and if they aren't passed or are '' they will
4156: be derived from the ENV
4157:
4158: =item *
4159:
4160: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4161: uses critical subroutine
4162:
4163: =item *
4164:
4165: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4166: all args are optional
4167:
4168: =item *
4169:
4170: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4171: works very similar to store/cstore, but all data is stored in a
4172: temporary location and can be reset using tmpreset, $storehash should
4173: be a hash reference, returns nothing on success
4174:
4175: =item *
4176:
4177: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4178: similar to restore, but all data is stored in a temporary location and
4179: can be reset using tmpreset. Returns a hash of values on success,
4180: error string otherwise.
4181:
4182: =item *
4183:
4184: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4185: deltes all keys for $symb form the temporary storage hash.
4186:
4187: =item *
4188:
4189: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4190: reference filled in from namesp ($udom and $uname are optional)
4191:
4192: =item *
4193:
4194: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4195: namesp ($udom and $uname are optional)
4196:
4197: =item *
4198:
4199: dump($namespace,$udom,$uname,$regexp) :
4200: dumps the complete (or key matching regexp) namespace into a hash
4201: ($udom, $uname and $regexp are optional)
4202:
4203: =item *
4204:
4205: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4206: ($udom and $uname are optional)
4207:
4208: =item *
4209:
4210: cput($namespace,$storehash,$udom,$uname) : critical put
4211: ($udom and $uname are optional)
4212:
4213: =item *
4214:
4215: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4216: reference filled in from namesp (encrypts the return communication)
4217: ($udom and $uname are optional)
4218:
4219: =item *
4220:
4221: log($udom,$name,$home,$message) : write to permanent log for user; use
4222: critical subroutine
4223:
4224: =back
4225:
4226: =head2 Network Status Functions
4227:
4228: =over 4
4229:
4230: =item *
4231:
4232: dirlist($uri) : return directory list based on URI
4233:
4234: =item *
4235:
4236: spareserver() : find server with least workload from spare.tab
4237:
4238: =back
4239:
4240: =head2 Apache Request
4241:
4242: =over 4
4243:
4244: =item *
4245:
4246: ssi($url,%hash) : server side include, does a complete request cycle on url to
4247: localhost, posts hash
4248:
4249: =back
4250:
4251: =head2 Data to String to Data
4252:
4253: =over 4
4254:
4255: =item *
4256:
4257: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4258: and '&' separators, supports elements that are arrayrefs and hashrefs
4259:
4260: =item *
4261:
4262: hashref2str($hashref) : convert a hashref into a string complete with
4263: escaping and '=' and '&' separators, supports elements that are
4264: arrayrefs and hashrefs
4265:
4266: =item *
4267:
4268: arrayref2str($arrayref) : convert an arrayref into a string complete
4269: with escaping and '&' separators, supports elements that are arrayrefs
4270: and hashrefs
4271:
4272: =item *
4273:
4274: str2hash($string) : convert string to hash using unescaping and
4275: splitting on '=' and '&', supports elements that are arrayrefs and
4276: hashrefs
4277:
4278: =item *
4279:
4280: str2array($string) : convert string to hash using unescaping and
4281: splitting on '&', supports elements that are arrayrefs and hashrefs
4282:
4283: =back
4284:
4285: =head2 Logging Routines
4286:
4287: =over 4
4288:
4289: These routines allow one to make log messages in the lonnet.log and
4290: lonnet.perm logfiles.
4291:
4292: =item *
4293:
4294: logtouch() : make sure the logfile, lonnet.log, exists
4295:
4296: =item *
4297:
4298: logthis() : append message to the normal lonnet.log file, it gets
4299: preiodically rolled over and deleted.
4300:
4301: =item *
4302:
4303: logperm() : append a permanent message to lonnet.perm.log, this log
4304: file never gets deleted by any automated portion of the system, only
4305: messages of critical importance should go in here.
4306:
4307: =back
4308:
4309: =head2 General File Helper Routines
4310:
4311: =over 4
4312:
4313: =item *
4314:
4315: getfile($file) : returns the entire contents of a file or -1; it
4316: properly subscribes to and replicates the file if neccessary.
4317:
4318: =item *
4319:
4320: filelocation($dir,$file) : returns file system location of a file
4321: based on URI; meant to be "fairly clean" absolute reference, $dir is a
4322: directory that relative $file lookups are to looked in ($dir of /a/dir
4323: and a file of ../bob will become /a/bob)
4324:
4325: =item *
4326:
4327: hreflocation($dir,$file) : returns file system location or a URL; same as
4328: filelocation except for hrefs
4329:
4330: =item *
4331:
4332: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
4333:
4334: =back
4335:
4336: =head2 HTTP Helper Routines
4337:
4338: =over 4
4339:
4340: =item *
4341:
4342: escape() : unpack non-word characters into CGI-compatible hex codes
4343:
4344: =item *
4345:
4346: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
4347:
4348: =back
4349:
4350: =head1 PRIVATE SUBROUTINES
4351:
4352: =head2 Underlying communication routines (Shouldn't call)
4353:
4354: =over 4
4355:
4356: =item *
4357:
4358: subreply() : tries to pass a message to lonc, returns con_lost if incapable
4359:
4360: =item *
4361:
4362: reply() : uses subreply to send a message to remote machine, logs all failures
4363:
4364: =item *
4365:
4366: critical() : passes a critical message to another server; if cannot
4367: get through then place message in connection buffer directory and
4368: returns con_delayed, if incapable of saving message, returns
4369: con_failed
4370:
4371: =item *
4372:
4373: reconlonc() : tries to reconnect lonc client processes.
4374:
4375: =back
4376:
4377: =head2 Resource Access Logging
4378:
4379: =over 4
4380:
4381: =item *
4382:
4383: flushcourselogs() : flush (save) buffer logs and access logs
4384:
4385: =item *
4386:
4387: courselog($what) : save message for course in hash
4388:
4389: =item *
4390:
4391: courseacclog($what) : save message for course using &courselog(). Perform
4392: special processing for specific resource types (problems, exams, quizzes, etc).
4393:
4394: =item *
4395:
4396: goodbye() : flush course logs and log shutting down; it is called in srm.conf
4397: as a PerlChildExitHandler
4398:
4399: =back
4400:
4401: =head2 Other
4402:
4403: =over 4
4404:
4405: =item *
4406:
4407: symblist($mapname,%newhash) : update symbolic storage links
4408:
4409: =back
4410:
4411: =cut
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