1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.323 2003/02/03 18:03:53 harris41 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);
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: # ------- Add a token to a remote URI's query string to vouch for access rights
831:
832: sub tokenwrapper {
833: my $uri=shift;
834: $uri=~s/^http\:\/\/([^\/]+)//;
835: $uri=~s/^\///;
836: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
837: my $token=$1;
838: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
839: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
840: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
841: (($uri=~/\?/)?'&':'?').'token='.$token.
842: '&tokenissued='.$perlvar{'lonHostID'};
843: } else {
844: return '/adm/notfound.html';
845: }
846: }
847:
848: # --------------- Take an uploaded file and put it into the userfiles directory
849: # input: name of form element, coursedoc=1 means this is for the course
850: # output: url of file in userspace
851:
852: sub userfileupload {
853: my ($formname,$coursedoc)=@_;
854: my $fname=$ENV{'form.'.$formname.'.filename'};
855: # Replace Windows backslashes by forward slashes
856: $fname=~s/\\/\//g;
857: # Get rid of everything but the actual filename
858: $fname=~s/^.*\/([^\/]+)$/$1/;
859: # Replace spaces by underscores
860: $fname=~s/\s+/\_/g;
861: # Replace all other weird characters by nothing
862: $fname=~s/[^\w\.\-]//g;
863: # See if there is anything left
864: unless ($fname) { return 'error: no uploaded file'; }
865: chop($ENV{'form.'.$formname});
866: # Create the directory if not present
867: my $docuname='';
868: my $docudom='';
869: my $docuhome='';
870: if ($coursedoc) {
871: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
872: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
873: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
874: } else {
875: $docuname=$ENV{'user.name'};
876: $docudom=$ENV{'user.domain'};
877: $docuhome=$ENV{'user.home'};
878: }
879: return
880: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
881: }
882:
883: sub finishuserfileupload {
884: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
885: my $path=$docudom.'/'.$docuname.'/';
886: my $filepath=$perlvar{'lonDocRoot'};
887: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
888: my $count;
889: for ($count=4;$count<=$#parts;$count++) {
890: $filepath.="/$parts[$count]";
891: if ((-e $filepath)!=1) {
892: mkdir($filepath,0777);
893: }
894: }
895: # Save the file
896: {
897: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
898: print $fh $ENV{'form.'.$formname};
899: }
900: # Notify homeserver to grep it
901: #
902:
903: my $fetchresult=
904: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
905: if ($fetchresult eq 'ok') {
906: #
907: # Return the URL to it
908: return '/uploaded/'.$path.$fname;
909: } else {
910: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
911: ' to host '.$docuhome.': '.$fetchresult);
912: return '/adm/notfound.html';
913: }
914: }
915:
916: # ------------------------------------------------------------------------- Log
917:
918: sub log {
919: my ($dom,$nam,$hom,$what)=@_;
920: return critical("log:$dom:$nam:$what",$hom);
921: }
922:
923: # ------------------------------------------------------------------ Course Log
924:
925: sub flushcourselogs {
926: &logthis('Flushing course log buffers');
927: foreach (keys %courselogs) {
928: my $crsid=$_;
929: if (&reply('log:'.$coursedombuf{$crsid}.':'.
930: &escape($courselogs{$crsid}),
931: $coursehombuf{$crsid}) eq 'ok') {
932: delete $courselogs{$crsid};
933: } else {
934: &logthis('Failed to flush log buffer for '.$crsid);
935: if (length($courselogs{$crsid})>40000) {
936: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
937: " exceeded maximum size, deleting.</font>");
938: delete $courselogs{$crsid};
939: }
940: }
941: }
942: &logthis('Flushing access logs');
943: foreach (keys %accesshash) {
944: my $entry=$_;
945: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
946: my %temphash=($entry => $accesshash{$entry});
947: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
948: delete $accesshash{$entry};
949: }
950: }
951: $dumpcount++;
952: }
953:
954: sub courselog {
955: my $what=shift;
956: $what=time.':'.$what;
957: unless ($ENV{'request.course.id'}) { return ''; }
958: $coursedombuf{$ENV{'request.course.id'}}=
959: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
960: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
961: $coursehombuf{$ENV{'request.course.id'}}=
962: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
963: if (defined $courselogs{$ENV{'request.course.id'}}) {
964: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
965: } else {
966: $courselogs{$ENV{'request.course.id'}}.=$what;
967: }
968: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
969: &flushcourselogs();
970: }
971: }
972:
973: sub courseacclog {
974: my $fnsymb=shift;
975: unless ($ENV{'request.course.id'}) { return ''; }
976: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
977: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
978: $what.=':POST';
979: foreach (keys %ENV) {
980: if ($_=~/^form\.(.*)/) {
981: $what.=':'.$1.'='.$ENV{$_};
982: }
983: }
984: }
985: &courselog($what);
986: }
987:
988: sub countacc {
989: my $url=&declutter(shift);
990: unless ($ENV{'request.course.id'}) { return ''; }
991: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
992: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
993: if (defined($accesshash{$key})) {
994: $accesshash{$key}++;
995: } else {
996: $accesshash{$key}=1;
997: }
998: }
999:
1000: # ----------------------------------------------------------- Check out an item
1001:
1002: sub checkout {
1003: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1004: my $now=time;
1005: my $lonhost=$perlvar{'lonHostID'};
1006: my $infostr=&escape(
1007: 'CHECKOUTTOKEN&'.
1008: $tuname.'&'.
1009: $tudom.'&'.
1010: $tcrsid.'&'.
1011: $symb.'&'.
1012: $now.'&'.$ENV{'REMOTE_ADDR'});
1013: my $token=&reply('tmpput:'.$infostr,$lonhost);
1014: if ($token=~/^error\:/) {
1015: &logthis("<font color=blue>WARNING: ".
1016: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1017: "</font>");
1018: return '';
1019: }
1020:
1021: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1022: $token=~tr/a-z/A-Z/;
1023:
1024: my %infohash=('resource.0.outtoken' => $token,
1025: 'resource.0.checkouttime' => $now,
1026: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1027:
1028: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1029: return '';
1030: } else {
1031: &logthis("<font color=blue>WARNING: ".
1032: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1033: "</font>");
1034: }
1035:
1036: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1037: &escape('Checkout '.$infostr.' - '.
1038: $token)) ne 'ok') {
1039: return '';
1040: } else {
1041: &logthis("<font color=blue>WARNING: ".
1042: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1043: "</font>");
1044: }
1045: return $token;
1046: }
1047:
1048: # ------------------------------------------------------------ Check in an item
1049:
1050: sub checkin {
1051: my $token=shift;
1052: my $now=time;
1053: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1054: $lonhost=~tr/A-Z/a-z/;
1055: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1056: $dtoken=~s/\W/\_/g;
1057: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1058: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1059:
1060: unless (($tuname) && ($tudom)) {
1061: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1062: return '';
1063: }
1064:
1065: unless (&allowed('mgr',$tcrsid)) {
1066: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1067: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1068: return '';
1069: }
1070:
1071: my %infohash=('resource.0.intoken' => $token,
1072: 'resource.0.checkintime' => $now,
1073: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1074:
1075: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1076: return '';
1077: }
1078:
1079: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1080: &escape('Checkin - '.$token)) ne 'ok') {
1081: return '';
1082: }
1083:
1084: return ($symb,$tuname,$tudom,$tcrsid);
1085: }
1086:
1087: # --------------------------------------------- Set Expire Date for Spreadsheet
1088:
1089: sub expirespread {
1090: my ($uname,$udom,$stype,$usymb)=@_;
1091: my $cid=$ENV{'request.course.id'};
1092: if ($cid) {
1093: my $now=time;
1094: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1095: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1096: $ENV{'course.'.$cid.'.num'}.
1097: ':nohist_expirationdates:'.
1098: &escape($key).'='.$now,
1099: $ENV{'course.'.$cid.'.home'})
1100: }
1101: return 'ok';
1102: }
1103:
1104: # ----------------------------------------------------- Devalidate Spreadsheets
1105:
1106: sub devalidate {
1107: my $symb=shift;
1108: my $cid=$ENV{'request.course.id'};
1109: if ($cid) {
1110: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
1111: my $status=
1112: &del('nohist_calculatedsheets',
1113: [$key.'studentcalc'],
1114: $ENV{'course.'.$cid.'.domain'},
1115: $ENV{'course.'.$cid.'.num'})
1116: .' '.
1117: &del('nohist_calculatedsheets_'.$cid,
1118: [$key.'assesscalc:'.$symb]);
1119: unless ($status eq 'ok ok') {
1120: &logthis('Could not devalidate spreadsheet '.
1121: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
1122: $symb.': '.$status);
1123: }
1124: }
1125: }
1126:
1127: sub get_scalar {
1128: my ($string,$end) = @_;
1129: my $value;
1130: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1131: $value = $1;
1132: } elsif ($$string =~ s/^([^&]*?)&//) {
1133: $value = $1;
1134: }
1135: return &unescape($value);
1136: }
1137:
1138: sub array2str {
1139: my (@array) = @_;
1140: my $result=&arrayref2str(\@array);
1141: $result=~s/^__ARRAY_REF__//;
1142: $result=~s/__END_ARRAY_REF__$//;
1143: return $result;
1144: }
1145:
1146: sub arrayref2str {
1147: my ($arrayref) = @_;
1148: my $result='__ARRAY_REF__';
1149: foreach my $elem (@$arrayref) {
1150: if(ref($elem) eq 'ARRAY') {
1151: $result.=&arrayref2str($elem).'&';
1152: } elsif(ref($elem) eq 'HASH') {
1153: $result.=&hashref2str($elem).'&';
1154: } elsif(ref($elem)) {
1155: #print("Got a ref of ".(ref($elem))." skipping.");
1156: } else {
1157: $result.=&escape($elem).'&';
1158: }
1159: }
1160: $result=~s/\&$//;
1161: $result .= '__END_ARRAY_REF__';
1162: return $result;
1163: }
1164:
1165: sub hash2str {
1166: my (%hash) = @_;
1167: my $result=&hashref2str(\%hash);
1168: $result=~s/^__HASH_REF__//;
1169: $result=~s/__END_HASH_REF__$//;
1170: return $result;
1171: }
1172:
1173: sub hashref2str {
1174: my ($hashref)=@_;
1175: my $result='__HASH_REF__';
1176: foreach (keys(%$hashref)) {
1177: if (ref($_) eq 'ARRAY') {
1178: $result.=&arrayref2str($_).'=';
1179: } elsif (ref($_) eq 'HASH') {
1180: $result.=&hashref2str($_).'=';
1181: } elsif (ref($_)) {
1182: $result.='=';
1183: #print("Got a ref of ".(ref($_))." skipping.");
1184: } else {
1185: if ($_) {$result.=&escape($_).'=';} else { last; }
1186: }
1187:
1188: if(ref($hashref->{$_}) eq 'ARRAY') {
1189: $result.=&arrayref2str($hashref->{$_}).'&';
1190: } elsif(ref($hashref->{$_}) eq 'HASH') {
1191: $result.=&hashref2str($hashref->{$_}).'&';
1192: } elsif(ref($hashref->{$_})) {
1193: $result.='&';
1194: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1195: } else {
1196: $result.=&escape($hashref->{$_}).'&';
1197: }
1198: }
1199: $result=~s/\&$//;
1200: $result .= '__END_HASH_REF__';
1201: return $result;
1202: }
1203:
1204: sub str2hash {
1205: my ($string)=@_;
1206: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1207: return %$hash;
1208: }
1209:
1210: sub str2hashref {
1211: my ($string) = @_;
1212:
1213: my %hash;
1214:
1215: if($string !~ /^__HASH_REF__/) {
1216: if (! ($string eq '' || !defined($string))) {
1217: $hash{'error'}='Not hash reference';
1218: }
1219: return (\%hash, $string);
1220: }
1221:
1222: $string =~ s/^__HASH_REF__//;
1223:
1224: while($string !~ /^__END_HASH_REF__/) {
1225: #key
1226: my $key='';
1227: if($string =~ /^__HASH_REF__/) {
1228: ($key, $string)=&str2hashref($string);
1229: if(defined($key->{'error'})) {
1230: $hash{'error'}='Bad data';
1231: return (\%hash, $string);
1232: }
1233: } elsif($string =~ /^__ARRAY_REF__/) {
1234: ($key, $string)=&str2arrayref($string);
1235: if($key->[0] eq 'Array reference error') {
1236: $hash{'error'}='Bad data';
1237: return (\%hash, $string);
1238: }
1239: } else {
1240: $string =~ s/^(.*?)=//;
1241: $key=&unescape($1);
1242: }
1243: $string =~ s/^=//;
1244:
1245: #value
1246: my $value='';
1247: if($string =~ /^__HASH_REF__/) {
1248: ($value, $string)=&str2hashref($string);
1249: if(defined($value->{'error'})) {
1250: $hash{'error'}='Bad data';
1251: return (\%hash, $string);
1252: }
1253: } elsif($string =~ /^__ARRAY_REF__/) {
1254: ($value, $string)=&str2arrayref($string);
1255: if($value->[0] eq 'Array reference error') {
1256: $hash{'error'}='Bad data';
1257: return (\%hash, $string);
1258: }
1259: } else {
1260: $value=&get_scalar(\$string,'__END_HASH_REF__');
1261: }
1262: $string =~ s/^&//;
1263:
1264: $hash{$key}=$value;
1265: }
1266:
1267: $string =~ s/^__END_HASH_REF__//;
1268:
1269: return (\%hash, $string);
1270: }
1271:
1272: sub str2array {
1273: my ($string)=@_;
1274: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1275: return @$array;
1276: }
1277:
1278: sub str2arrayref {
1279: my ($string) = @_;
1280: my @array;
1281:
1282: if($string !~ /^__ARRAY_REF__/) {
1283: if (! ($string eq '' || !defined($string))) {
1284: $array[0]='Array reference error';
1285: }
1286: return (\@array, $string);
1287: }
1288:
1289: $string =~ s/^__ARRAY_REF__//;
1290:
1291: while($string !~ /^__END_ARRAY_REF__/) {
1292: my $value='';
1293: if($string =~ /^__HASH_REF__/) {
1294: ($value, $string)=&str2hashref($string);
1295: if(defined($value->{'error'})) {
1296: $array[0] ='Array reference error';
1297: return (\@array, $string);
1298: }
1299: } elsif($string =~ /^__ARRAY_REF__/) {
1300: ($value, $string)=&str2arrayref($string);
1301: if($value->[0] eq 'Array reference error') {
1302: $array[0] ='Array reference error';
1303: return (\@array, $string);
1304: }
1305: } else {
1306: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1307: }
1308: $string =~ s/^&//;
1309:
1310: push(@array, $value);
1311: }
1312:
1313: $string =~ s/^__END_ARRAY_REF__//;
1314:
1315: return (\@array, $string);
1316: }
1317:
1318: # -------------------------------------------------------------------Temp Store
1319:
1320: sub tmpreset {
1321: my ($symb,$namespace,$domain,$stuname) = @_;
1322: if (!$symb) {
1323: $symb=&symbread();
1324: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1325: }
1326: $symb=escape($symb);
1327:
1328: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1329: $namespace=~s/\//\_/g;
1330: $namespace=~s/\W//g;
1331:
1332: #FIXME needs to do something for /pub resources
1333: if (!$domain) { $domain=$ENV{'user.domain'}; }
1334: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1335: my $path=$perlvar{'lonDaemons'}.'/tmp';
1336: my %hash;
1337: if (tie(%hash,'GDBM_File',
1338: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1339: &GDBM_WRCREAT(),0640)) {
1340: foreach my $key (keys %hash) {
1341: if ($key=~ /:$symb/) {
1342: delete($hash{$key});
1343: }
1344: }
1345: }
1346: }
1347:
1348: sub tmpstore {
1349: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1350:
1351: if (!$symb) {
1352: $symb=&symbread();
1353: if (!$symb) { $symb= $ENV{'request.url'}; }
1354: }
1355: $symb=escape($symb);
1356:
1357: if (!$namespace) {
1358: # I don't think we would ever want to store this for a course.
1359: # it seems this will only be used if we don't have a course.
1360: #$namespace=$ENV{'request.course.id'};
1361: #if (!$namespace) {
1362: $namespace=$ENV{'request.state'};
1363: #}
1364: }
1365: $namespace=~s/\//\_/g;
1366: $namespace=~s/\W//g;
1367: #FIXME needs to do something for /pub resources
1368: if (!$domain) { $domain=$ENV{'user.domain'}; }
1369: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1370: my $now=time;
1371: my %hash;
1372: my $path=$perlvar{'lonDaemons'}.'/tmp';
1373: if (tie(%hash,'GDBM_File',
1374: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1375: &GDBM_WRCREAT(),0640)) {
1376: $hash{"version:$symb"}++;
1377: my $version=$hash{"version:$symb"};
1378: my $allkeys='';
1379: foreach my $key (keys(%$storehash)) {
1380: $allkeys.=$key.':';
1381: $hash{"$version:$symb:$key"}=$$storehash{$key};
1382: }
1383: $hash{"$version:$symb:timestamp"}=$now;
1384: $allkeys.='timestamp';
1385: $hash{"$version:keys:$symb"}=$allkeys;
1386: if (untie(%hash)) {
1387: return 'ok';
1388: } else {
1389: return "error:$!";
1390: }
1391: } else {
1392: return "error:$!";
1393: }
1394: }
1395:
1396: # -----------------------------------------------------------------Temp Restore
1397:
1398: sub tmprestore {
1399: my ($symb,$namespace,$domain,$stuname) = @_;
1400:
1401: if (!$symb) {
1402: $symb=&symbread();
1403: if (!$symb) { $symb= $ENV{'request.url'}; }
1404: }
1405: $symb=escape($symb);
1406:
1407: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1408: #FIXME needs to do something for /pub resources
1409: if (!$domain) { $domain=$ENV{'user.domain'}; }
1410: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1411:
1412: my %returnhash;
1413: $namespace=~s/\//\_/g;
1414: $namespace=~s/\W//g;
1415: my %hash;
1416: my $path=$perlvar{'lonDaemons'}.'/tmp';
1417: if (tie(%hash,'GDBM_File',
1418: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1419: &GDBM_READER(),0640)) {
1420: my $version=$hash{"version:$symb"};
1421: $returnhash{'version'}=$version;
1422: my $scope;
1423: for ($scope=1;$scope<=$version;$scope++) {
1424: my $vkeys=$hash{"$scope:keys:$symb"};
1425: my @keys=split(/:/,$vkeys);
1426: my $key;
1427: $returnhash{"$scope:keys"}=$vkeys;
1428: foreach $key (@keys) {
1429: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1430: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1431: }
1432: }
1433: if (!(untie(%hash))) {
1434: return "error:$!";
1435: }
1436: } else {
1437: return "error:$!";
1438: }
1439: return %returnhash;
1440: }
1441:
1442: # ----------------------------------------------------------------------- Store
1443:
1444: sub store {
1445: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1446: my $home='';
1447:
1448: if ($stuname) { $home=&homeserver($stuname,$domain); }
1449:
1450: $symb=&symbclean($symb);
1451: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1452:
1453: &devalidate($symb);
1454:
1455: $symb=escape($symb);
1456: if (!$namespace) {
1457: unless ($namespace=$ENV{'request.course.id'}) {
1458: return '';
1459: }
1460: }
1461: if (!$domain) { $domain=$ENV{'user.domain'}; }
1462: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1463: if (!$home) { $home=$ENV{'user.home'}; }
1464: my $namevalue='';
1465: foreach (keys %$storehash) {
1466: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1467: }
1468: $namevalue=~s/\&$//;
1469: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1470: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1471: }
1472:
1473: # -------------------------------------------------------------- Critical Store
1474:
1475: sub cstore {
1476: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1477: my $home='';
1478:
1479: if ($stuname) { $home=&homeserver($stuname,$domain); }
1480:
1481: $symb=&symbclean($symb);
1482: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1483:
1484: &devalidate($symb);
1485:
1486: $symb=escape($symb);
1487: if (!$namespace) {
1488: unless ($namespace=$ENV{'request.course.id'}) {
1489: return '';
1490: }
1491: }
1492: if (!$domain) { $domain=$ENV{'user.domain'}; }
1493: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1494: if (!$home) { $home=$ENV{'user.home'}; }
1495:
1496: my $namevalue='';
1497: foreach (keys %$storehash) {
1498: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1499: }
1500: $namevalue=~s/\&$//;
1501: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1502: return critical
1503: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1504: }
1505:
1506: # --------------------------------------------------------------------- Restore
1507:
1508: sub restore {
1509: my ($symb,$namespace,$domain,$stuname) = @_;
1510: my $home='';
1511:
1512: if ($stuname) { $home=&homeserver($stuname,$domain); }
1513:
1514: if (!$symb) {
1515: unless ($symb=escape(&symbread())) { return ''; }
1516: } else {
1517: $symb=&escape(&symbclean($symb));
1518: }
1519: if (!$namespace) {
1520: unless ($namespace=$ENV{'request.course.id'}) {
1521: return '';
1522: }
1523: }
1524: if (!$domain) { $domain=$ENV{'user.domain'}; }
1525: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1526: if (!$home) { $home=$ENV{'user.home'}; }
1527: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1528:
1529: my %returnhash=();
1530: foreach (split(/\&/,$answer)) {
1531: my ($name,$value)=split(/\=/,$_);
1532: $returnhash{&unescape($name)}=&unescape($value);
1533: }
1534: my $version;
1535: for ($version=1;$version<=$returnhash{'version'};$version++) {
1536: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1537: $returnhash{$_}=$returnhash{$version.':'.$_};
1538: }
1539: }
1540: return %returnhash;
1541: }
1542:
1543: # ---------------------------------------------------------- Course Description
1544:
1545: sub coursedescription {
1546: my $courseid=shift;
1547: $courseid=~s/^\///;
1548: $courseid=~s/\_/\//g;
1549: my ($cdomain,$cnum)=split(/\//,$courseid);
1550: my $chome=&homeserver($cnum,$cdomain);
1551: my $normalid=$cdomain.'_'.$cnum;
1552: # need to always cache even if we get errors otherwise we keep
1553: # trying and trying and trying to get the course description.
1554: my %envhash=();
1555: my %returnhash=();
1556: $envhash{'course.'.$normalid.'.last_cache'}=time;
1557: if ($chome ne 'no_host') {
1558: %returnhash=&dump('environment',$cdomain,$cnum);
1559: if (!exists($returnhash{'con_lost'})) {
1560: $returnhash{'home'}= $chome;
1561: $returnhash{'domain'} = $cdomain;
1562: $returnhash{'num'} = $cnum;
1563: while (my ($name,$value) = each %returnhash) {
1564: $envhash{'course.'.$normalid.'.'.$name}=$value;
1565: }
1566: $returnhash{'url'}=&clutter($returnhash{'url'});
1567: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1568: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1569: $envhash{'course.'.$normalid.'.home'}=$chome;
1570: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1571: $envhash{'course.'.$normalid.'.num'}=$cnum;
1572: }
1573: }
1574: &appenv(%envhash);
1575: return %returnhash;
1576: }
1577:
1578: # -------------------------------------------------------- Get user privileges
1579:
1580: sub rolesinit {
1581: my ($domain,$username,$authhost)=@_;
1582: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1583: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1584: my %allroles=();
1585: my %thesepriv=();
1586: my $now=time;
1587: my $userroles="user.login.time=$now\n";
1588: my $thesestr;
1589:
1590: if ($rolesdump ne '') {
1591: foreach (split(/&/,$rolesdump)) {
1592: if ($_!~/^rolesdef\&/) {
1593: my ($area,$role)=split(/=/,$_);
1594: $area=~s/\_\w\w$//;
1595: my ($trole,$tend,$tstart)=split(/_/,$role);
1596: $userroles.='user.role.'.$trole.'.'.$area.'='.
1597: $tstart.'.'.$tend."\n";
1598: if ($tend!=0) {
1599: if ($tend<$now) {
1600: $trole='';
1601: }
1602: }
1603: if ($tstart!=0) {
1604: if ($tstart>$now) {
1605: $trole='';
1606: }
1607: }
1608: if (($area ne '') && ($trole ne '')) {
1609: my $spec=$trole.'.'.$area;
1610: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1611: if ($trole =~ /^cr\//) {
1612: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1613: my $homsvr=homeserver($rauthor,$rdomain);
1614: if ($hostname{$homsvr} ne '') {
1615: my $roledef=
1616: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1617: $homsvr);
1618: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1619: my ($syspriv,$dompriv,$coursepriv)=
1620: split(/\_/,unescape($roledef));
1621: $allroles{'cm./'}.=':'.$syspriv;
1622: $allroles{$spec.'./'}.=':'.$syspriv;
1623: if ($tdomain ne '') {
1624: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1625: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1626: if ($trest ne '') {
1627: $allroles{'cm.'.$area}.=':'.$coursepriv;
1628: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1629: }
1630: }
1631: }
1632: }
1633: } else {
1634: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1635: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1636: if ($tdomain ne '') {
1637: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1638: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1639: if ($trest ne '') {
1640: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1641: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1642: }
1643: }
1644: }
1645: }
1646: }
1647: }
1648: my $adv=0;
1649: my $author=0;
1650: foreach (keys %allroles) {
1651: %thesepriv=();
1652: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1653: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1654: foreach (split(/:/,$allroles{$_})) {
1655: if ($_ ne '') {
1656: my ($privilege,$restrictions)=split(/&/,$_);
1657: if ($restrictions eq '') {
1658: $thesepriv{$privilege}='F';
1659: } else {
1660: if ($thesepriv{$privilege} ne 'F') {
1661: $thesepriv{$privilege}.=$restrictions;
1662: }
1663: }
1664: }
1665: }
1666: $thesestr='';
1667: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1668: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1669: }
1670: $userroles.='user.adv='.$adv."\n".
1671: 'user.author='.$author."\n";
1672: $ENV{'user.adv'}=$adv;
1673: }
1674: return $userroles;
1675: }
1676:
1677: # --------------------------------------------------------------- get interface
1678:
1679: sub get {
1680: my ($namespace,$storearr,$udomain,$uname)=@_;
1681: my $items='';
1682: foreach (@$storearr) {
1683: $items.=escape($_).'&';
1684: }
1685: $items=~s/\&$//;
1686: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1687: if (!$uname) { $uname=$ENV{'user.name'}; }
1688: my $uhome=&homeserver($uname,$udomain);
1689:
1690: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1691: my @pairs=split(/\&/,$rep);
1692: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1693: return @pairs;
1694: }
1695: my %returnhash=();
1696: my $i=0;
1697: foreach (@$storearr) {
1698: $returnhash{$_}=unescape($pairs[$i]);
1699: $i++;
1700: }
1701: return %returnhash;
1702: }
1703:
1704: # --------------------------------------------------------------- del interface
1705:
1706: sub del {
1707: my ($namespace,$storearr,$udomain,$uname)=@_;
1708: my $items='';
1709: foreach (@$storearr) {
1710: $items.=escape($_).'&';
1711: }
1712: $items=~s/\&$//;
1713: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1714: if (!$uname) { $uname=$ENV{'user.name'}; }
1715: my $uhome=&homeserver($uname,$udomain);
1716:
1717: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1718: }
1719:
1720: # -------------------------------------------------------------- dump interface
1721:
1722: sub dump {
1723: my ($namespace,$udomain,$uname,$regexp)=@_;
1724: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1725: if (!$uname) { $uname=$ENV{'user.name'}; }
1726: my $uhome=&homeserver($uname,$udomain);
1727: if ($regexp) {
1728: $regexp=&escape($regexp);
1729: } else {
1730: $regexp='.';
1731: }
1732: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1733: my @pairs=split(/\&/,$rep);
1734: my %returnhash=();
1735: foreach (@pairs) {
1736: my ($key,$value)=split(/=/,$_);
1737: $returnhash{unescape($key)}=unescape($value);
1738: }
1739: return %returnhash;
1740: }
1741:
1742: # --------------------------------------------------------------- currentdump
1743: sub currentdump {
1744: my ($namespace,$udomain,$uname)=@_;
1745: if (!$udomain) { $udomain = $ENV{'user.domain'}; }
1746: if (!$uname) { $uname = $ENV{'user.name'}; }
1747: my $uhome = &homeserver($uname,$udomain);
1748: my $rep=reply("currentdump:$udomain:$uname:$namespace",$uhome);
1749: return if ($rep =~ /^(error:|no_such_host)/);
1750: #
1751: my %returnhash=();
1752: #
1753: if ($rep eq "unknown_cmd") {
1754: # an old lond will not know currentdump
1755: # Do a dump and make it look like a currentdump
1756: my @tmp = &dump($namespace,$udomain,$uname,'.');
1757: return if ($tmp[0] =~ /^(error:|no_such_host)/);
1758: my %hash = @tmp;
1759: @tmp=();
1760: # Code ripped from lond, essentially. The only difference
1761: # here is the unescaping done by lonnet::dump(). Conceivably
1762: # we might run in to problems with parameter names =~ /^v\./
1763: while (my ($key,$value) = each(%hash)) {
1764: my ($v,$symb,$param) = split(/:/,$key);
1765: next if ($v eq 'version' || $symb eq 'keys');
1766: next if (exists($returnhash{$symb}) &&
1767: exists($returnhash{$symb}->{$param}) &&
1768: $returnhash{$symb}->{'v.'.$param} > $v);
1769: $returnhash{$symb}->{$param}=$value;
1770: $returnhash{$symb}->{'v.'.$param}=$v;
1771: }
1772: #
1773: # Remove all of the keys in the hashes which keep track of
1774: # the version of the parameter.
1775: while (my ($symb,$param_hash) = each(%returnhash)) {
1776: # use a foreach because we are going to delete from the hash.
1777: foreach my $key (keys(%$param_hash)) {
1778: delete($param_hash->{$key}) if ($key =~ /^v\./);
1779: }
1780: }
1781: } else {
1782: my @pairs=split(/\&/,$rep);
1783: foreach (@pairs) {
1784: my ($key,$value)=split(/=/,$_);
1785: my ($symb,$param) = split(/:/,$key);
1786: $returnhash{&unescape($symb)}->{&unescape($param)} =
1787: &unescape($value);
1788: }
1789: }
1790: return %returnhash;
1791: }
1792:
1793: # --------------------------------------------------------------- put interface
1794:
1795: sub put {
1796: my ($namespace,$storehash,$udomain,$uname)=@_;
1797: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1798: if (!$uname) { $uname=$ENV{'user.name'}; }
1799: my $uhome=&homeserver($uname,$udomain);
1800: my $items='';
1801: foreach (keys %$storehash) {
1802: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1803: }
1804: $items=~s/\&$//;
1805: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1806: }
1807:
1808: # ------------------------------------------------------ critical put interface
1809:
1810: sub cput {
1811: my ($namespace,$storehash,$udomain,$uname)=@_;
1812: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1813: if (!$uname) { $uname=$ENV{'user.name'}; }
1814: my $uhome=&homeserver($uname,$udomain);
1815: my $items='';
1816: foreach (keys %$storehash) {
1817: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1818: }
1819: $items=~s/\&$//;
1820: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1821: }
1822:
1823: # -------------------------------------------------------------- eget interface
1824:
1825: sub eget {
1826: my ($namespace,$storearr,$udomain,$uname)=@_;
1827: my $items='';
1828: foreach (@$storearr) {
1829: $items.=escape($_).'&';
1830: }
1831: $items=~s/\&$//;
1832: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1833: if (!$uname) { $uname=$ENV{'user.name'}; }
1834: my $uhome=&homeserver($uname,$udomain);
1835: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1836: my @pairs=split(/\&/,$rep);
1837: my %returnhash=();
1838: my $i=0;
1839: foreach (@$storearr) {
1840: $returnhash{$_}=unescape($pairs[$i]);
1841: $i++;
1842: }
1843: return %returnhash;
1844: }
1845:
1846: # ------------------------------------------------- Check for a user privilege
1847:
1848: sub allowed {
1849: my ($priv,$uri)=@_;
1850:
1851: my $orguri=$uri;
1852: $uri=&declutter($uri);
1853:
1854: # Free bre access to adm and meta resources
1855:
1856: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1857: return 'F';
1858: }
1859:
1860: # Free bre to public access
1861:
1862: if ($priv eq 'bre') {
1863: my $copyright=&metadata($uri,'copyright');
1864: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
1865: return 'F';
1866: }
1867: if ($copyright eq 'priv') {
1868: $uri=~/([^\/]+)\/([^\/]+)\//;
1869: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
1870: return '';
1871: }
1872: }
1873: if ($copyright eq 'domain') {
1874: $uri=~/([^\/]+)\/([^\/]+)\//;
1875: unless (($ENV{'user.domain'} eq $1) ||
1876: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
1877: return '';
1878: }
1879: }
1880: if ($ENV{'request.role'}=~ /li\.\//) {
1881: # Library role, so allow browsing of resources in this domain.
1882: return 'F';
1883: }
1884: }
1885: # Domain coordinator is trying to create a course
1886: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
1887: # uri is the requested domain in this case.
1888: # comparison to 'request.role.domain' shows if the user has selected
1889: # a role of dc for the domain in question.
1890: return 'F' if ($uri eq $ENV{'request.role.domain'});
1891: }
1892:
1893: my $thisallowed='';
1894: my $statecond=0;
1895: my $courseprivid='';
1896:
1897: # Course
1898:
1899: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1900: $thisallowed.=$1;
1901: }
1902:
1903: # Domain
1904:
1905: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1906: =~/$priv\&([^\:]*)/) {
1907: $thisallowed.=$1;
1908: }
1909:
1910: # Course: uri itself is a course
1911: my $courseuri=$uri;
1912: $courseuri=~s/\_(\d)/\/$1/;
1913: $courseuri=~s/^([^\/])/\/$1/;
1914:
1915: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1916: =~/$priv\&([^\:]*)/) {
1917: $thisallowed.=$1;
1918: }
1919:
1920: # URI is an uploaded document for this course
1921:
1922: if (($priv eq 'bre') &&
1923: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
1924: return 'F';
1925: }
1926: # Full access at system, domain or course-wide level? Exit.
1927:
1928: if ($thisallowed=~/F/) {
1929: return 'F';
1930: }
1931:
1932: # If this is generating or modifying users, exit with special codes
1933:
1934: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1935: return $thisallowed;
1936: }
1937: #
1938: # Gathered so far: system, domain and course wide privileges
1939: #
1940: # Course: See if uri or referer is an individual resource that is part of
1941: # the course
1942:
1943: if ($ENV{'request.course.id'}) {
1944:
1945: $courseprivid=$ENV{'request.course.id'};
1946: if ($ENV{'request.course.sec'}) {
1947: $courseprivid.='/'.$ENV{'request.course.sec'};
1948: }
1949: $courseprivid=~s/\_/\//;
1950: my $checkreferer=1;
1951: my ($match,$cond)=&is_on_map($uri);
1952: if ($match) {
1953: $statecond=$cond;
1954: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1955: =~/$priv\&([^\:]*)/) {
1956: $thisallowed.=$1;
1957: $checkreferer=0;
1958: }
1959: }
1960:
1961: if ($checkreferer) {
1962: my $refuri=$ENV{'httpref.'.$orguri};
1963: unless ($refuri) {
1964: foreach (keys %ENV) {
1965: if ($_=~/^httpref\..*\*/) {
1966: my $pattern=$_;
1967: $pattern=~s/^httpref\.\/res\///;
1968: $pattern=~s/\*/\[\^\/\]\+/g;
1969: $pattern=~s/\//\\\//g;
1970: if ($orguri=~/$pattern/) {
1971: $refuri=$ENV{$_};
1972: }
1973: }
1974: }
1975: }
1976:
1977: if ($refuri) {
1978: $refuri=&declutter($refuri);
1979: my ($match,$cond)=&is_on_map($refuri);
1980: if ($match) {
1981: my $refstatecond=$cond;
1982: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1983: =~/$priv\&([^\:]*)/) {
1984: $thisallowed.=$1;
1985: $uri=$refuri;
1986: $statecond=$refstatecond;
1987: }
1988: }
1989: }
1990: }
1991: }
1992:
1993: #
1994: # Gathered now: all privileges that could apply, and condition number
1995: #
1996: #
1997: # Full or no access?
1998: #
1999:
2000: if ($thisallowed=~/F/) {
2001: return 'F';
2002: }
2003:
2004: unless ($thisallowed) {
2005: return '';
2006: }
2007:
2008: # Restrictions exist, deal with them
2009: #
2010: # C:according to course preferences
2011: # R:according to resource settings
2012: # L:unless locked
2013: # X:according to user session state
2014: #
2015:
2016: # Possibly locked functionality, check all courses
2017: # Locks might take effect only after 10 minutes cache expiration for other
2018: # courses, and 2 minutes for current course
2019:
2020: my $envkey;
2021: if ($thisallowed=~/L/) {
2022: foreach $envkey (keys %ENV) {
2023: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2024: my $courseid=$2;
2025: my $roleid=$1.'.'.$2;
2026: $courseid=~s/^\///;
2027: my $expiretime=600;
2028: if ($ENV{'request.role'} eq $roleid) {
2029: $expiretime=120;
2030: }
2031: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2032: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2033: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2034: &coursedescription($courseid);
2035: }
2036: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2037: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2038: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2039: &log($ENV{'user.domain'},$ENV{'user.name'},
2040: $ENV{'user.home'},
2041: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2042: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2043: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2044: return '';
2045: }
2046: }
2047: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2048: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2049: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2050: &log($ENV{'user.domain'},$ENV{'user.name'},
2051: $ENV{'user.home'},
2052: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2053: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2054: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2055: return '';
2056: }
2057: }
2058: }
2059: }
2060: }
2061:
2062: #
2063: # Rest of the restrictions depend on selected course
2064: #
2065:
2066: unless ($ENV{'request.course.id'}) {
2067: return '1';
2068: }
2069:
2070: #
2071: # Now user is definitely in a course
2072: #
2073:
2074:
2075: # Course preferences
2076:
2077: if ($thisallowed=~/C/) {
2078: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2079: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2080: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2081: =~/$rolecode/) {
2082: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2083: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2084: $ENV{'request.course.id'});
2085: return '';
2086: }
2087:
2088: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2089: =~/$unamedom/) {
2090: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2091: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2092: $ENV{'request.course.id'});
2093: return '';
2094: }
2095: }
2096:
2097: # Resource preferences
2098:
2099: if ($thisallowed=~/R/) {
2100: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2101: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
2102: if (-e $filename) {
2103: my @content;
2104: {
2105: my $fh=Apache::File->new($filename);
2106: @content=<$fh>;
2107: }
2108: if (join('',@content)=~
2109: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
2110: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2111: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2112: return '';
2113:
2114: }
2115: }
2116: }
2117:
2118: # Restricted by state or randomout?
2119:
2120: if ($thisallowed=~/X/) {
2121: if ($ENV{'acc.randomout'}) {
2122: my $symb=&symbread($uri,1);
2123: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2124: return '';
2125: }
2126: }
2127: if (&condval($statecond)) {
2128: return '2';
2129: } else {
2130: return '';
2131: }
2132: }
2133:
2134: return 'F';
2135: }
2136:
2137: # --------------------------------------------------- Is a resource on the map?
2138:
2139: sub is_on_map {
2140: my $uri=&declutter(shift);
2141: my @uriparts=split(/\//,$uri);
2142: my $filename=$uriparts[$#uriparts];
2143: my $pathname=$uri;
2144: $pathname=~s|/\Q$filename\E$||;
2145: #Trying to find the conditional for the file
2146: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2147: /\&\Q$filename\E\:([\d\|]+)\&/);
2148: if ($match) {
2149: return (1,$1);
2150: } else {
2151: return (0,0);
2152: }
2153: }
2154:
2155: # ----------------------------------------------------------------- Define Role
2156:
2157: sub definerole {
2158: if (allowed('mcr','/')) {
2159: my ($rolename,$sysrole,$domrole,$courole)=@_;
2160: foreach (split('/',$sysrole)) {
2161: my ($crole,$cqual)=split(/\&/,$_);
2162: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2163: if ($pr{'cr:s'}=~/$crole\&/) {
2164: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2165: return "refused:s:$crole&$cqual";
2166: }
2167: }
2168: }
2169: foreach (split('/',$domrole)) {
2170: my ($crole,$cqual)=split(/\&/,$_);
2171: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2172: if ($pr{'cr:d'}=~/$crole\&/) {
2173: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2174: return "refused:d:$crole&$cqual";
2175: }
2176: }
2177: }
2178: foreach (split('/',$courole)) {
2179: my ($crole,$cqual)=split(/\&/,$_);
2180: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2181: if ($pr{'cr:c'}=~/$crole\&/) {
2182: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2183: return "refused:c:$crole&$cqual";
2184: }
2185: }
2186: }
2187: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2188: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2189: "rolesdef_$rolename=".
2190: escape($sysrole.'_'.$domrole.'_'.$courole);
2191: return reply($command,$ENV{'user.home'});
2192: } else {
2193: return 'refused';
2194: }
2195: }
2196:
2197: # ---------------- Make a metadata query against the network of library servers
2198:
2199: sub metadata_query {
2200: my ($query,$custom,$customshow,$server_array)=@_;
2201: my %rhash;
2202: my @server_list = (defined($server_array) ? @$server_array
2203: : keys(%libserv) );
2204: for my $server (@server_list) {
2205: unless ($custom or $customshow) {
2206: my $reply=&reply("querysend:".&escape($query),$server);
2207: $rhash{$server}=$reply;
2208: }
2209: else {
2210: my $reply=&reply("querysend:".&escape($query).':'.
2211: &escape($custom).':'.&escape($customshow),
2212: $server);
2213: $rhash{$server}=$reply;
2214: }
2215: }
2216: return \%rhash;
2217: }
2218:
2219: # ----------------------------------------- Send log queries and wait for reply
2220:
2221: sub log_query {
2222: my ($uname,$udom,$query,%filters)=@_;
2223: my $uhome=&homeserver($uname,$udom);
2224: if ($uhome eq 'no_host') { return 'error: no_host'; }
2225: my $uhost=$hostname{$uhome};
2226: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2227: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2228: $uhome);
2229: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2230: return get_query_reply($queryid);
2231: }
2232:
2233: sub get_query_reply {
2234: my $queryid=shift;
2235: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2236: my $reply='';
2237: for (1..100) {
2238: sleep 2;
2239: if (-e $replyfile.'.end') {
2240: if (my $fh=Apache::File->new($replyfile)) {
2241: $reply.=<$fh>;
2242: $fh->close;
2243: } else { return 'error: reply_file_error'; }
2244: return &unescape($reply);
2245: }
2246: }
2247: return 'timeout:'.$queryid;
2248: }
2249:
2250: sub courselog_query {
2251: #
2252: # possible filters:
2253: # url: url or symb
2254: # username
2255: # domain
2256: # action: view, submit, grade
2257: # start: timestamp
2258: # end: timestamp
2259: #
2260: my (%filters)=@_;
2261: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2262: if ($filters{'url'}) {
2263: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2264: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2265: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2266: }
2267: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2268: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2269: return &log_query($cname,$cdom,'courselog',%filters);
2270: }
2271:
2272: sub userlog_query {
2273: my ($uname,$udom,%filters)=@_;
2274: return &log_query($uname,$udom,'userlog',%filters);
2275: }
2276:
2277: # ------------------------------------------------------------------ Plain Text
2278:
2279: sub plaintext {
2280: my $short=shift;
2281: return $prp{$short};
2282: }
2283:
2284: # ----------------------------------------------------------------- Assign Role
2285:
2286: sub assignrole {
2287: my ($udom,$uname,$url,$role,$end,$start)=@_;
2288: my $mrole;
2289: if ($role =~ /^cr\//) {
2290: unless (&allowed('ccr',$url)) {
2291: &logthis('Refused custom assignrole: '.
2292: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2293: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2294: return 'refused';
2295: }
2296: $mrole='cr';
2297: } else {
2298: my $cwosec=$url;
2299: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2300: unless (&allowed('c'.$role,$cwosec)) {
2301: &logthis('Refused assignrole: '.
2302: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2303: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2304: return 'refused';
2305: }
2306: $mrole=$role;
2307: }
2308: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2309: "$udom:$uname:$url".'_'."$mrole=$role";
2310: if ($end) { $command.='_'.$end; }
2311: if ($start) {
2312: if ($end) {
2313: $command.='_'.$start;
2314: } else {
2315: $command.='_0_'.$start;
2316: }
2317: }
2318: return &reply($command,&homeserver($uname,$udom));
2319: }
2320:
2321: # -------------------------------------------------- Modify user authentication
2322: # Overrides without validation
2323:
2324: sub modifyuserauth {
2325: my ($udom,$uname,$umode,$upass)=@_;
2326: my $uhome=&homeserver($uname,$udom);
2327: unless (&allowed('mau',$udom)) { return 'refused'; }
2328: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2329: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2330: ' in domain '.$ENV{'request.role.domain'});
2331: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2332: &escape($upass),$uhome);
2333: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2334: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2335: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2336: &log($udom,,$uname,$uhome,
2337: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2338: $ENV{'user.name'}.', '.$umode.
2339: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2340: unless ($reply eq 'ok') {
2341: &logthis('Authentication mode error: '.$reply);
2342: return 'error: '.$reply;
2343: }
2344: return 'ok';
2345: }
2346:
2347: # --------------------------------------------------------------- Modify a user
2348:
2349: sub modifyuser {
2350: my ($udom, $uname, $uid,
2351: $umode, $upass, $first,
2352: $middle, $last, $gene,
2353: $forceid, $desiredhome)=@_;
2354: $udom=~s/\W//g;
2355: $uname=~s/\W//g;
2356: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2357: $umode.', '.$first.', '.$middle.', '.
2358: $last.', '.$gene.'(forceid: '.$forceid.')'.
2359: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2360: ' desiredhome not specified').
2361: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2362: ' in domain '.$ENV{'request.role.domain'});
2363: my $uhome=&homeserver($uname,$udom,'true');
2364: # ----------------------------------------------------------------- Create User
2365: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2366: my $unhome='';
2367: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2368: $unhome = $desiredhome;
2369: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2370: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2371: } else { # load balancing routine for determining $unhome
2372: my $tryserver;
2373: my $loadm=10000000;
2374: foreach $tryserver (keys %libserv) {
2375: if ($hostdom{$tryserver} eq $udom) {
2376: my $answer=reply('load',$tryserver);
2377: if (($answer=~/\d+/) && ($answer<$loadm)) {
2378: $loadm=$answer;
2379: $unhome=$tryserver;
2380: }
2381: }
2382: }
2383: }
2384: if (($unhome eq '') || ($unhome eq 'no_host')) {
2385: return 'error: unable to find a home server for '.$uname.
2386: ' in domain '.$udom;
2387: }
2388: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2389: &escape($upass),$unhome);
2390: unless ($reply eq 'ok') {
2391: return 'error: '.$reply;
2392: }
2393: $uhome=&homeserver($uname,$udom,'true');
2394: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2395: return 'error: verify home';
2396: }
2397: } # End of creation of new user
2398: # ---------------------------------------------------------------------- Add ID
2399: if ($uid) {
2400: $uid=~tr/A-Z/a-z/;
2401: my %uidhash=&idrget($udom,$uname);
2402: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2403: && (!$forceid)) {
2404: unless ($uid eq $uidhash{$uname}) {
2405: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2406: }
2407: } else {
2408: &idput($udom,($uname => $uid));
2409: }
2410: }
2411: # -------------------------------------------------------------- Add names, etc
2412: my @tmp=&get('environment',
2413: ['firstname','middlename','lastname','generation'],
2414: $udom,$uname);
2415: my %names;
2416: if ($tmp[0] =~ m/^error:.*/) {
2417: %names=();
2418: } else {
2419: %names = @tmp;
2420: }
2421: if ($first) { $names{'firstname'} = $first; }
2422: if ($middle) { $names{'middlename'} = $middle; }
2423: if ($last) { $names{'lastname'} = $last; }
2424: if ($gene) { $names{'generation'} = $gene; }
2425: my $reply = &put('environment', \%names, $udom,$uname);
2426: if ($reply ne 'ok') { return 'error: '.$reply; }
2427: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2428: $umode.', '.$first.', '.$middle.', '.
2429: $last.', '.$gene.' by '.
2430: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2431: return 'ok';
2432: }
2433:
2434: # -------------------------------------------------------------- Modify student
2435:
2436: sub modifystudent {
2437: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2438: $end,$start,$forceid,$desiredhome)=@_;
2439: my $cid='';
2440: unless ($cid=$ENV{'request.course.id'}) {
2441: return 'not_in_class';
2442: }
2443: # --------------------------------------------------------------- Make the user
2444: my $reply=&modifyuser
2445: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2446: $desiredhome);
2447: unless ($reply eq 'ok') { return $reply; }
2448: # This will cause &modify_student_enrollment to get the uid from the
2449: # students environment
2450: $uid = undef if (!$forceid);
2451: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2452: $last,$gene,$usec,$end,$start);
2453: return $reply;
2454: }
2455:
2456: sub modify_student_enrollment {
2457: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2458: # Get the course id from the environment
2459: my $cid='';
2460: unless ($cid=$ENV{'request.course.id'}) {
2461: return 'not_in_class';
2462: }
2463: # Make sure the user exists
2464: my $uhome=&homeserver($uname,$udom);
2465: if (($uhome eq '') || ($uhome eq 'no_host')) {
2466: return 'error: no such user';
2467: }
2468: #
2469: # Get student data if we were not given enough information
2470: if (!defined($first) || $first eq '' ||
2471: !defined($last) || $last eq '' ||
2472: !defined($uid) || $uid eq '' ||
2473: !defined($middle) || $middle eq '' ||
2474: !defined($gene) || $gene eq '') {
2475: # They did not supply us with enough data to enroll the student, so
2476: # we need to pick up more information.
2477: my %tmp = &get('environment',
2478: ['firstname','middlename','lastname', 'generation','id']
2479: ,$udom,$uname);
2480:
2481: foreach (keys(%tmp)) {
2482: &logthis("key $_ = ".$tmp{$_});
2483: }
2484: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2485: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2486: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
2487: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
2488: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2489: }
2490: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2491: $first,$middle);
2492: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2493: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2494: &escape($uname.':'.$udom).'='.
2495: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
2496: $ENV{'course.'.$cid.'.home'});
2497: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2498: return 'error: '.$reply;
2499: }
2500: # Add student role to user
2501: my $uurl='/'.$cid;
2502: $uurl=~s/\_/\//g;
2503: if ($usec) {
2504: $uurl.='/'.$usec;
2505: }
2506: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2507: }
2508:
2509: # ------------------------------------------------- Write to course preferences
2510:
2511: sub writecoursepref {
2512: my ($courseid,%prefs)=@_;
2513: $courseid=~s/^\///;
2514: $courseid=~s/\_/\//g;
2515: my ($cdomain,$cnum)=split(/\//,$courseid);
2516: my $chome=homeserver($cnum,$cdomain);
2517: if (($chome eq '') || ($chome eq 'no_host')) {
2518: return 'error: no such course';
2519: }
2520: my $cstring='';
2521: foreach (keys %prefs) {
2522: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2523: }
2524: $cstring=~s/\&$//;
2525: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2526: }
2527:
2528: # ---------------------------------------------------------- Make/modify course
2529:
2530: sub createcourse {
2531: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2532: $url=&declutter($url);
2533: my $cid='';
2534: unless (&allowed('ccc',$udom)) {
2535: return 'refused';
2536: }
2537: # ------------------------------------------------------------------- Create ID
2538: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2539: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2540: # ----------------------------------------------- Make sure that does not exist
2541: my $uhome=&homeserver($uname,$udom,'true');
2542: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2543: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2544: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2545: $uhome=&homeserver($uname,$udom,'true');
2546: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2547: return 'error: unable to generate unique course-ID';
2548: }
2549: }
2550: # ------------------------------------------------ Check supplied server name
2551: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2552: if (! exists($libserv{$course_server})) {
2553: return 'error:bad server name '.$course_server;
2554: }
2555: # ------------------------------------------------------------- Make the course
2556: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2557: $course_server);
2558: unless ($reply eq 'ok') { return 'error: '.$reply; }
2559: $uhome=&homeserver($uname,$udom,'true');
2560: if (($uhome eq '') || ($uhome eq 'no_host')) {
2561: return 'error: no such course';
2562: }
2563: # ----------------------------------------------------------------- Course made
2564: my $topurl=$url;
2565: unless ($nonstandard) {
2566: # ------------------------------------------ For standard courses, make top url
2567: my $mapurl=&clutter($url);
2568: if ($mapurl eq '/res/') { $mapurl=''; }
2569: $ENV{'form.initmap'}=(<<ENDINITMAP);
2570: <map>
2571: <resource id="1" type="start"></resource>
2572: <resource id="2" src="$mapurl"></resource>
2573: <resource id="3" type="finish"></resource>
2574: <link index="1" from="1" to="2"></link>
2575: <link index="2" from="2" to="3"></link>
2576: </map>
2577: ENDINITMAP
2578: $topurl=&declutter(
2579: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2580: );
2581: }
2582: # ----------------------------------------------------------- Write preferences
2583: &writecoursepref($udom.'_'.$uname,
2584: ('description' => $description,
2585: 'url' => $topurl));
2586: return '/'.$udom.'/'.$uname;
2587: }
2588:
2589: # ---------------------------------------------------------- Assign Custom Role
2590:
2591: sub assigncustomrole {
2592: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2593: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2594: $end,$start);
2595: }
2596:
2597: # ----------------------------------------------------------------- Revoke Role
2598:
2599: sub revokerole {
2600: my ($udom,$uname,$url,$role)=@_;
2601: my $now=time;
2602: return &assignrole($udom,$uname,$url,$role,$now);
2603: }
2604:
2605: # ---------------------------------------------------------- Revoke Custom Role
2606:
2607: sub revokecustomrole {
2608: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2609: my $now=time;
2610: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2611: }
2612:
2613: # ------------------------------------------------------------ Directory lister
2614:
2615: sub dirlist {
2616: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2617:
2618: $uri=~s/^\///;
2619: $uri=~s/\/$//;
2620: my ($udom, $uname);
2621: (undef,$udom,$uname)=split(/\//,$uri);
2622: if(defined($userdomain)) {
2623: $udom = $userdomain;
2624: }
2625: if(defined($username)) {
2626: $uname = $username;
2627: }
2628:
2629: my $dirRoot = $perlvar{'lonDocRoot'};
2630: if(defined($alternateDirectoryRoot)) {
2631: $dirRoot = $alternateDirectoryRoot;
2632: $dirRoot =~ s/\/$//;
2633: }
2634:
2635: if($udom) {
2636: if($uname) {
2637: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2638: homeserver($uname,$udom));
2639: return split(/:/,$listing);
2640: } elsif(!defined($alternateDirectoryRoot)) {
2641: my $tryserver;
2642: my %allusers=();
2643: foreach $tryserver (keys %libserv) {
2644: if($hostdom{$tryserver} eq $udom) {
2645: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2646: $udom, $tryserver);
2647: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2648: && ($listing ne 'con_lost')) {
2649: foreach (split(/:/,$listing)) {
2650: my ($entry,@stat)=split(/&/,$_);
2651: $allusers{$entry}=1;
2652: }
2653: }
2654: }
2655: }
2656: my $alluserstr='';
2657: foreach (sort keys %allusers) {
2658: $alluserstr.=$_.'&user:';
2659: }
2660: $alluserstr=~s/:$//;
2661: return split(/:/,$alluserstr);
2662: } else {
2663: my @emptyResults = ();
2664: push(@emptyResults, 'missing user name');
2665: return split(':',@emptyResults);
2666: }
2667: } elsif(!defined($alternateDirectoryRoot)) {
2668: my $tryserver;
2669: my %alldom=();
2670: foreach $tryserver (keys %libserv) {
2671: $alldom{$hostdom{$tryserver}}=1;
2672: }
2673: my $alldomstr='';
2674: foreach (sort keys %alldom) {
2675: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2676: }
2677: $alldomstr=~s/:$//;
2678: return split(/:/,$alldomstr);
2679: } else {
2680: my @emptyResults = ();
2681: push(@emptyResults, 'missing domain');
2682: return split(':',@emptyResults);
2683: }
2684: }
2685:
2686: # --------------------------------------------- GetFileTimestamp
2687: # This function utilizes dirlist and returns the date stamp for
2688: # when it was last modified. It will also return an error of -1
2689: # if an error occurs
2690:
2691: sub GetFileTimestamp {
2692: my ($studentDomain,$studentName,$filename,$root)=@_;
2693: $studentDomain=~s/\W//g;
2694: $studentName=~s/\W//g;
2695: my $subdir=$studentName.'__';
2696: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
2697: my $proname="$studentDomain/$subdir/$studentName";
2698: $proname .= '/'.$filename;
2699: my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
2700: $root);
2701: my $fileStat = $dir[0];
2702: my @stats = split('&', $fileStat);
2703: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
2704: return $stats[9];
2705: } else {
2706: return -1;
2707: }
2708: }
2709:
2710: # -------------------------------------------------------- Value of a Condition
2711:
2712: sub directcondval {
2713: my $number=shift;
2714: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2715: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2716: } else {
2717: return 2;
2718: }
2719: }
2720:
2721: sub condval {
2722: my $condidx=shift;
2723: my $result=0;
2724: my $allpathcond='';
2725: foreach (split(/\|/,$condidx)) {
2726: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2727: $allpathcond.=
2728: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2729: }
2730: }
2731: $allpathcond=~s/\|$//;
2732: if ($ENV{'request.course.id'}) {
2733: if ($allpathcond) {
2734: my $operand='|';
2735: my @stack;
2736: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2737: if ($_ eq '(') {
2738: push @stack,($operand,$result)
2739: } elsif ($_ eq ')') {
2740: my $before=pop @stack;
2741: if (pop @stack eq '&') {
2742: $result=$result>$before?$before:$result;
2743: } else {
2744: $result=$result>$before?$result:$before;
2745: }
2746: } elsif (($_ eq '&') || ($_ eq '|')) {
2747: $operand=$_;
2748: } else {
2749: my $new=directcondval($_);
2750: if ($operand eq '&') {
2751: $result=$result>$new?$new:$result;
2752: } else {
2753: $result=$result>$new?$result:$new;
2754: }
2755: }
2756: }
2757: }
2758: }
2759: return $result;
2760: }
2761:
2762: # ---------------------------------------------------- Devalidate courseresdata
2763:
2764: sub devalidatecourseresdata {
2765: my ($coursenum,$coursedomain)=@_;
2766: my $hashid=$coursenum.':'.$coursedomain;
2767: delete $courseresdatacache{$hashid.'.time'};
2768: }
2769:
2770: # --------------------------------------------------- Course Resourcedata Query
2771:
2772: sub courseresdata {
2773: my ($coursenum,$coursedomain,@which)=@_;
2774: my $coursehom=&homeserver($coursenum,$coursedomain);
2775: my $hashid=$coursenum.':'.$coursedomain;
2776: my $dodump=0;
2777: if (!defined($courseresdatacache{$hashid.'.time'})) {
2778: $dodump=1;
2779: } else {
2780: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2781: }
2782: if ($dodump) {
2783: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2784: my ($tmp) = keys(%dumpreply);
2785: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2786: $courseresdatacache{$hashid.'.time'}=time;
2787: $courseresdatacache{$hashid}=\%dumpreply;
2788: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
2789: return $tmp;
2790: }
2791: }
2792: foreach my $item (@which) {
2793: if (defined($courseresdatacache{$hashid}->{$item})) {
2794: return $courseresdatacache{$hashid}->{$item};
2795: }
2796: }
2797: return undef;
2798: }
2799:
2800: # --------------------------------------------------------- Value of a Variable
2801:
2802: sub EXT {
2803: my ($varname,$symbparm,$udom,$uname,)=@_;
2804:
2805: unless ($varname) { return ''; }
2806:
2807: #get real user name/domain, courseid and symb
2808: my $courseid;
2809: if (!($uname && $udom)) {
2810: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2811: if (!$symbparm) { $symbparm=$cursymb; }
2812: } else {
2813: $courseid=$ENV{'request.course.id'};
2814: }
2815: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2816: my $rest;
2817: if (defined($therest[0])) {
2818: $rest=join('.',@therest);
2819: } else {
2820: $rest='';
2821: }
2822:
2823: my $qualifierrest=$qualifier;
2824: if ($rest) { $qualifierrest.='.'.$rest; }
2825: my $spacequalifierrest=$space;
2826: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2827: if ($realm eq 'user') {
2828: # --------------------------------------------------------------- user.resource
2829: if ($space eq 'resource') {
2830: my %restored=&restore(undef,undef,$udom,$uname);
2831: return $restored{$qualifierrest};
2832: # ----------------------------------------------------------------- user.access
2833: } elsif ($space eq 'access') {
2834: # FIXME - not supporting calls for a specific user
2835: return &allowed($qualifier,$rest);
2836: # ------------------------------------------ user.preferences, user.environment
2837: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2838: if (($uname eq $ENV{'user.name'}) &&
2839: ($udom eq $ENV{'user.domain'})) {
2840: return $ENV{join('.',('environment',$qualifierrest))};
2841: } else {
2842: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2843: return $returnhash{$qualifierrest};
2844: }
2845: # ----------------------------------------------------------------- user.course
2846: } elsif ($space eq 'course') {
2847: # FIXME - not supporting calls for a specific user
2848: return $ENV{join('.',('request.course',$qualifier))};
2849: # ------------------------------------------------------------------- user.role
2850: } elsif ($space eq 'role') {
2851: # FIXME - not supporting calls for a specific user
2852: my ($role,$where)=split(/\./,$ENV{'request.role'});
2853: if ($qualifier eq 'value') {
2854: return $role;
2855: } elsif ($qualifier eq 'extent') {
2856: return $where;
2857: }
2858: # ----------------------------------------------------------------- user.domain
2859: } elsif ($space eq 'domain') {
2860: return $udom;
2861: # ------------------------------------------------------------------- user.name
2862: } elsif ($space eq 'name') {
2863: return $uname;
2864: # ---------------------------------------------------- Any other user namespace
2865: } else {
2866: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2867: my %reply=&get($space,[$item]);
2868: return $reply{$item};
2869: }
2870: } elsif ($realm eq 'query') {
2871: # ---------------------------------------------- pull stuff out of query string
2872: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
2873: return $ENV{'form.'.$space};
2874: } elsif ($realm eq 'request') {
2875: # ------------------------------------------------------------- request.browser
2876: if ($space eq 'browser') {
2877: return $ENV{'browser.'.$qualifier};
2878: # ------------------------------------------------------------ request.filename
2879: } else {
2880: return $ENV{'request.'.$spacequalifierrest};
2881: }
2882: } elsif ($realm eq 'course') {
2883: # ---------------------------------------------------------- course.description
2884: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
2885: } elsif ($realm eq 'resource') {
2886:
2887: if ($courseid eq $ENV{'request.course.id'}) {
2888:
2889: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2890:
2891: # ----------------------------------------------------- Cascading lookup scheme
2892: if (!$symbparm) { $symbparm=&symbread(); }
2893: my $symbp=$symbparm;
2894: my $mapp=(split(/\_\_\_/,$symbp))[0];
2895:
2896: my $symbparm=$symbp.'.'.$spacequalifierrest;
2897: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2898:
2899: my $section;
2900: if (($ENV{'user.name'} eq $uname) &&
2901: ($ENV{'user.domain'} eq $udom)) {
2902: $section=$ENV{'request.course.sec'};
2903: } else {
2904: $section=&usection($udom,$uname,$courseid);
2905: }
2906:
2907: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
2908: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
2909: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
2910:
2911: my $courselevel=$courseid.'.'.$spacequalifierrest;
2912: my $courselevelr=$courseid.'.'.$symbparm;
2913: my $courselevelm=$courseid.'.'.$mapparm;
2914:
2915: # ----------------------------------------------------------- first, check user
2916: #most student don't have any data set, check if there is some data
2917: #every thirty minutes
2918: if (!
2919: (exists($ENV{'cache.studentresdata'})
2920: && (($ENV{'cache.studentresdata'}+1800) > time))) {
2921: my %resourcedata=&get('resourcedata',
2922: [$courselevelr,$courselevelm,$courselevel],
2923: $udom,$uname);
2924: my ($tmp)=keys(%resourcedata);
2925: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
2926: if ($resourcedata{$courselevelr}) {
2927: return $resourcedata{$courselevelr}; }
2928: if ($resourcedata{$courselevelm}) {
2929: return $resourcedata{$courselevelm}; }
2930: if ($resourcedata{$courselevel}) {
2931: return $resourcedata{$courselevel}; }
2932: } else {
2933: if ($tmp!~/No such file/) {
2934: &logthis("<font color=blue>WARNING:".
2935: " Trying to get resource data for ".
2936: $uname." at ".$udom.": ".
2937: $tmp."</font>");
2938: } elsif ($tmp=~/error:No such file/) {
2939: $ENV{'cache.studentresdata'}=time;
2940: &appenv(('cache.studentresdata'=>
2941: $ENV{'cache.studentresdata'}));
2942: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
2943: return $tmp;
2944: }
2945: }
2946: }
2947:
2948: # -------------------------------------------------------- second, check course
2949:
2950: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
2951: $ENV{'course.'.$courseid.'.domain'},
2952: ($seclevelr,$seclevelm,$seclevel,
2953: $courselevelr,$courselevelm,
2954: $courselevel));
2955: if (defined($coursereply)) { return $coursereply; }
2956:
2957: # ------------------------------------------------------ third, check map parms
2958: my %parmhash=();
2959: my $thisparm='';
2960: if (tie(%parmhash,'GDBM_File',
2961: $ENV{'request.course.fn'}.'_parms.db',
2962: &GDBM_READER(),0640)) {
2963: $thisparm=$parmhash{$symbparm};
2964: untie(%parmhash);
2965: }
2966: if ($thisparm) { return $thisparm; }
2967: }
2968: # --------------------------------------------- last, look in resource metadata
2969:
2970: $spacequalifierrest=~s/\./\_/;
2971: my $filename;
2972: if (!$symbparm) { $symbparm=&symbread(); }
2973: if ($symbparm) {
2974: $filename=(split(/\_\_\_/,$symbparm))[2];
2975: } else {
2976: $filename=$ENV{'request.filename'};
2977: }
2978: my $metadata=&metadata($filename,$spacequalifierrest);
2979: if (defined($metadata)) { return $metadata; }
2980: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
2981: if (defined($metadata)) { return $metadata; }
2982:
2983: # ------------------------------------------------------------------ Cascade up
2984: unless ($space eq '0') {
2985: my ($part,$id)=split(/\_/,$space);
2986: if ($id) {
2987: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2988: $symbparm,$udom,$uname);
2989: if (defined($partgeneral)) { return $partgeneral; }
2990: } else {
2991: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2992: $symbparm,$udom,$uname);
2993: if (defined($resourcegeneral)) { return $resourcegeneral; }
2994: }
2995: }
2996:
2997: # ---------------------------------------------------- Any other user namespace
2998: } elsif ($realm eq 'environment') {
2999: # ----------------------------------------------------------------- environment
3000: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3001: return $ENV{'environment.'.$spacequalifierrest};
3002: } else {
3003: my %returnhash=&userenvironment($udom,$uname,
3004: $spacequalifierrest);
3005: return $returnhash{$spacequalifierrest};
3006: }
3007: } elsif ($realm eq 'system') {
3008: # ----------------------------------------------------------------- system.time
3009: if ($space eq 'time') {
3010: return time;
3011: }
3012: }
3013: return '';
3014: }
3015:
3016: # ---------------------------------------------------------------- Get metadata
3017:
3018: sub metadata {
3019: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3020:
3021: $uri=&declutter($uri);
3022: # if it is a non metadata possible uri return quickly
3023: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3024: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
3025: return '';
3026: }
3027: my $filename=$uri;
3028: $uri=~s/\.meta$//;
3029: #
3030: # Is the metadata already cached?
3031: # Look at timestamp of caching
3032: # Everything is cached by the main uri, libraries are never directly cached
3033: #
3034: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3035: #
3036: # Is this a recursive call for a library?
3037: #
3038: if ($liburi) {
3039: $liburi=&declutter($liburi);
3040: $filename=$liburi;
3041: }
3042: my %metathesekeys=();
3043: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3044: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
3045: my $parser=HTML::LCParser->new(\$metastring);
3046: my $token;
3047: undef %metathesekeys;
3048: while ($token=$parser->get_token) {
3049: if ($token->[0] eq 'S') {
3050: if (defined($token->[2]->{'package'})) {
3051: #
3052: # This is a package - get package info
3053: #
3054: my $package=$token->[2]->{'package'};
3055: my $keyroot='';
3056: if ($prefix) {
3057: $keyroot.=$prefix;
3058: } else {
3059: if (defined($token->[2]->{'part'})) {
3060: $keyroot.='_'.$token->[2]->{'part'};
3061: }
3062: }
3063: if (defined($token->[2]->{'id'})) {
3064: $keyroot.='_'.$token->[2]->{'id'};
3065: }
3066: if ($metacache{$uri.':packages'}) {
3067: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3068: } else {
3069: $metacache{$uri.':packages'}=$package.$keyroot;
3070: }
3071: foreach (keys %packagetab) {
3072: if ($_=~/^$package\&/) {
3073: my ($pack,$name,$subp)=split(/\&/,$_);
3074: my $value=$packagetab{$_};
3075: my $part=$keyroot;
3076: $part=~s/^\_//;
3077: if ($subp eq 'display') {
3078: $value.=' [Part: '.$part.']';
3079: }
3080: my $unikey='parameter'.$keyroot.'_'.$name;
3081: $metathesekeys{$unikey}=1;
3082: $metacache{$uri.':'.$unikey.'.part'}=$part;
3083: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3084: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3085: }
3086: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3087: $metacache{$uri.':'.$unikey}=
3088: $metacache{$uri.':'.$unikey.'.default'}
3089: }
3090: }
3091: }
3092: } else {
3093: #
3094: # This is not a package - some other kind of start tag
3095: #
3096: my $entry=$token->[1];
3097: my $unikey;
3098: if ($entry eq 'import') {
3099: $unikey='';
3100: } else {
3101: $unikey=$entry;
3102: }
3103: if ($prefix) {
3104: $unikey.=$prefix;
3105: } else {
3106: if (defined($token->[2]->{'part'})) {
3107: $unikey.='_'.$token->[2]->{'part'};
3108: }
3109: }
3110: if (defined($token->[2]->{'id'})) {
3111: $unikey.='_'.$token->[2]->{'id'};
3112: }
3113:
3114: if ($entry eq 'import') {
3115: #
3116: # Importing a library here
3117: #
3118: if ($depthcount<20) {
3119: my $location=$parser->get_text('/import');
3120: my $dir=$filename;
3121: $dir=~s|[^/]*$||;
3122: $location=&filelocation($dir,$location);
3123: foreach (sort(split(/\,/,&metadata($uri,'keys',
3124: $location,$unikey,
3125: $depthcount+1)))) {
3126: $metathesekeys{$_}=1;
3127: }
3128: }
3129: } else {
3130:
3131: if (defined($token->[2]->{'name'})) {
3132: $unikey.='_'.$token->[2]->{'name'};
3133: }
3134: $metathesekeys{$unikey}=1;
3135: foreach (@{$token->[3]}) {
3136: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3137: }
3138: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3139: my $default=$metacache{$uri.':'.$unikey.'.default'};
3140: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3141: # only ws inside the tag, and not in default, so use default
3142: # as value
3143: $metacache{$uri.':'.$unikey}=$default;
3144: } else {
3145: # either something interesting inside the tag or default
3146: # uninteresting
3147: $metacache{$uri.':'.$unikey}=$internaltext;
3148: }
3149: # end of not-a-package not-a-library import
3150: }
3151: # end of not-a-package start tag
3152: }
3153: # the next is the end of "start tag"
3154: }
3155: }
3156: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3157: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3158: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3159: $metacache{$uri.':cachedtimestamp'}=time;
3160: # this is the end of "was not already recently cached
3161: }
3162: return $metacache{$uri.':'.$what};
3163: }
3164:
3165: sub metadata_generate_part0 {
3166: my ($metadata,$metacache,$uri) = @_;
3167: my %allnames;
3168: foreach my $metakey (sort keys %$metadata) {
3169: if ($metakey=~/^parameter\_(.*)/) {
3170: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3171: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3172: if (! exists($$metadata{'parameter_0_'.$name})) {
3173: $allnames{$name}=$part;
3174: }
3175: }
3176: }
3177: foreach my $name (keys(%allnames)) {
3178: $$metadata{"parameter_0_$name"}=1;
3179: my $key="$uri:parameter_0_$name";
3180: $$metacache{"$key.part"}='0';
3181: $$metacache{"$key.name"}=$name;
3182: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3183: $allnames{$name}.'_'.$name.
3184: '.type'};
3185: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3186: '.display'};
3187: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3188: $olddis=~s/$expr/\[Part: 0\]/;
3189: $$metacache{"$key.display"}=$olddis;
3190: }
3191: }
3192:
3193: # ------------------------------------------------- Get the title of a resource
3194:
3195: sub gettitle {
3196: my $urlsymb=shift;
3197: my $symb=&symbread($urlsymb);
3198: unless ($symb) {
3199: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3200: return &metadata($urlsymb,'title');
3201: }
3202: if ($titlecache{$symb}) { return $titlecache{$symb}; }
3203: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3204: my $title='';
3205: my %bighash;
3206: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3207: &GDBM_READER(),0640)) {
3208: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3209: $title=$bighash{'title_'.$mapid.'.'.$resid};
3210: untie %bighash;
3211: }
3212: if ($title) {
3213: $titlecache{$symb}=$title;
3214: return $title;
3215: } else {
3216: return &metadata($urlsymb,'title');
3217: }
3218: }
3219:
3220: # ------------------------------------------------- Update symbolic store links
3221:
3222: sub symblist {
3223: my ($mapname,%newhash)=@_;
3224: $mapname=declutter($mapname);
3225: my %hash;
3226: if (($ENV{'request.course.fn'}) && (%newhash)) {
3227: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3228: &GDBM_WRCREAT(),0640)) {
3229: foreach (keys %newhash) {
3230: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3231: }
3232: if (untie(%hash)) {
3233: return 'ok';
3234: }
3235: }
3236: }
3237: return 'error';
3238: }
3239:
3240: # --------------------------------------------------------------- Verify a symb
3241:
3242: sub symbverify {
3243: my ($symb,$thisfn)=@_;
3244: $thisfn=&declutter($thisfn);
3245: # direct jump to resource in page or to a sequence - will construct own symbs
3246: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3247: # check URL part
3248: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3249: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3250:
3251: $symb=&symbclean($symb);
3252:
3253: my %bighash;
3254: my $okay=0;
3255: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3256: &GDBM_READER(),0640)) {
3257: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3258: unless ($ids) {
3259: $ids=$bighash{'ids_/'.$thisfn};
3260: }
3261: if ($ids) {
3262: # ------------------------------------------------------------------- Has ID(s)
3263: foreach (split(/\,/,$ids)) {
3264: my ($mapid,$resid)=split(/\./,$_);
3265: if (
3266: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3267: eq $symb) {
3268: $okay=1;
3269: }
3270: }
3271: }
3272: untie(%bighash);
3273: }
3274: return $okay;
3275: }
3276:
3277: # --------------------------------------------------------------- Clean-up symb
3278:
3279: sub symbclean {
3280: my $symb=shift;
3281:
3282: # remove version from map
3283: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3284:
3285: # remove version from URL
3286: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3287:
3288: return $symb;
3289: }
3290:
3291: # ------------------------------------------------------ Return symb list entry
3292:
3293: sub symbread {
3294: my ($thisfn,$donotrecurse)=@_;
3295: # no filename provided? try from environment
3296: unless ($thisfn) {
3297: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3298: $thisfn=$ENV{'request.filename'};
3299: }
3300: # is that filename actually a symb? Verify, clean, and return
3301: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3302: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3303: }
3304: $thisfn=declutter($thisfn);
3305: my %hash;
3306: my %bighash;
3307: my $syval='';
3308: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3309: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3310: &GDBM_READER(),0640)) {
3311: $syval=$hash{$thisfn};
3312: untie(%hash);
3313: }
3314: # ---------------------------------------------------------- There was an entry
3315: if ($syval) {
3316: unless ($syval=~/\_\d+$/) {
3317: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3318: &appenv('request.ambiguous' => $thisfn);
3319: return '';
3320: }
3321: $syval.=$1;
3322: }
3323: } else {
3324: # ------------------------------------------------------- Was not in symb table
3325: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3326: &GDBM_READER(),0640)) {
3327: # ---------------------------------------------- Get ID(s) for current resource
3328: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3329: unless ($ids) {
3330: $ids=$bighash{'ids_/'.$thisfn};
3331: }
3332: unless ($ids) {
3333: # alias?
3334: $ids=$bighash{'mapalias_'.$thisfn};
3335: }
3336: if ($ids) {
3337: # ------------------------------------------------------------------- Has ID(s)
3338: my @possibilities=split(/\,/,$ids);
3339: if ($#possibilities==0) {
3340: # ----------------------------------------------- There is only one possibility
3341: my ($mapid,$resid)=split(/\./,$ids);
3342: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3343: } elsif (!$donotrecurse) {
3344: # ------------------------------------------ There is more than one possibility
3345: my $realpossible=0;
3346: foreach (@possibilities) {
3347: my $file=$bighash{'src_'.$_};
3348: if (&allowed('bre',$file)) {
3349: my ($mapid,$resid)=split(/\./,$_);
3350: if ($bighash{'map_type_'.$mapid} ne 'page') {
3351: $realpossible++;
3352: $syval=declutter($bighash{'map_id_'.$mapid}).
3353: '___'.$resid;
3354: }
3355: }
3356: }
3357: if ($realpossible!=1) { $syval=''; }
3358: } else {
3359: $syval='';
3360: }
3361: }
3362: untie(%bighash)
3363: }
3364: }
3365: if ($syval) {
3366: return &symbclean($syval.'___'.$thisfn);
3367: }
3368: }
3369: &appenv('request.ambiguous' => $thisfn);
3370: return '';
3371: }
3372:
3373: # ---------------------------------------------------------- Return random seed
3374:
3375: sub numval {
3376: my $txt=shift;
3377: $txt=~tr/A-J/0-9/;
3378: $txt=~tr/a-j/0-9/;
3379: $txt=~tr/K-T/0-9/;
3380: $txt=~tr/k-t/0-9/;
3381: $txt=~tr/U-Z/0-5/;
3382: $txt=~tr/u-z/0-5/;
3383: $txt=~s/\D//g;
3384: return int($txt);
3385: }
3386:
3387: sub rndseed {
3388: my ($symb,$courseid,$domain,$username)=@_;
3389: if (!$symb) {
3390: unless ($symb=&symbread()) { return time; }
3391: }
3392: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3393: if (!$domain) {$domain=$ENV{'user.domain'};}
3394: if (!$username) {$username=$ENV{'user.name'};}
3395: {
3396: use integer;
3397: my $symbchck=unpack("%32C*",$symb) << 27;
3398: my $symbseed=numval($symb) << 22;
3399: my $namechck=unpack("%32C*",$username) << 17;
3400: my $nameseed=numval($username) << 12;
3401: my $domainseed=unpack("%32C*",$domain) << 7;
3402: my $courseseed=unpack("%32C*",$courseid);
3403: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3404: #uncommenting these lines can break things!
3405: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3406: #&Apache::lonxml::debug("rndseed :$num:$symb");
3407: return $num;
3408: }
3409: }
3410:
3411: sub ireceipt {
3412: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3413: my $cuname=unpack("%32C*",$funame);
3414: my $cudom=unpack("%32C*",$fudom);
3415: my $cucourseid=unpack("%32C*",$fucourseid);
3416: my $cusymb=unpack("%32C*",$fusymb);
3417: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3418: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3419: ($cunique%$cuname+
3420: $cunique%$cudom+
3421: $cusymb%$cuname+
3422: $cusymb%$cudom+
3423: $cucourseid%$cuname+
3424: $cucourseid%$cudom);
3425: }
3426:
3427: sub receipt {
3428: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3429: return &ireceipt($name,$domain,$courseid,$symb);
3430: }
3431:
3432: # ------------------------------------------------------------ Serves up a file
3433: # returns either the contents of the file or a -1
3434: sub getfile {
3435: my $file=shift;
3436: if ($file=~/^\/*uploaded\//) { # user file
3437: my $ua=new LWP::UserAgent;
3438: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3439: my $response=$ua->request($request);
3440: if ($response->is_success()) {
3441: return $response->content;
3442: } else {
3443: return -1;
3444: }
3445: } else { # normal file from res space
3446: &repcopy($file);
3447: if (! -e $file ) { return -1; };
3448: my $fh=Apache::File->new($file);
3449: my $a='';
3450: while (<$fh>) { $a .=$_; }
3451: return $a;
3452: }
3453: }
3454:
3455: sub filelocation {
3456: my ($dir,$file) = @_;
3457: my $location;
3458: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3459: if ($file=~m:^/~:) { # is a contruction space reference
3460: $location = $file;
3461: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3462: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3463: $location=$file;
3464: } else {
3465: $file=~s/^$perlvar{'lonDocRoot'}//;
3466: $file=~s:^/*res::;
3467: if ( !( $file =~ m:^/:) ) {
3468: $location = $dir. '/'.$file;
3469: } else {
3470: $location = '/home/httpd/html/res'.$file;
3471: }
3472: }
3473: $location=~s://+:/:g; # remove duplicate /
3474: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3475: return $location;
3476: }
3477:
3478: sub hreflocation {
3479: my ($dir,$file)=@_;
3480: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3481: my $finalpath=filelocation($dir,$file);
3482: $finalpath=~s/^\/home\/httpd\/html//;
3483: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3484: return $finalpath;
3485: } else {
3486: return $file;
3487: }
3488: }
3489:
3490: # ------------------------------------------------------------- Declutters URLs
3491:
3492: sub declutter {
3493: my $thisfn=shift;
3494: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3495: $thisfn=~s/^\///;
3496: $thisfn=~s/^res\///;
3497: $thisfn=~s/\?.+$//;
3498: return $thisfn;
3499: }
3500:
3501: # ------------------------------------------------------------- Clutter up URLs
3502:
3503: sub clutter {
3504: my $thisfn='/'.&declutter(shift);
3505: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3506: $thisfn='/res'.$thisfn;
3507: }
3508: return $thisfn;
3509: }
3510:
3511: # -------------------------------------------------------- Escape Special Chars
3512:
3513: sub escape {
3514: my $str=shift;
3515: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3516: return $str;
3517: }
3518:
3519: # ----------------------------------------------------- Un-Escape Special Chars
3520:
3521: sub unescape {
3522: my $str=shift;
3523: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3524: return $str;
3525: }
3526:
3527: # ================================================================ Main Program
3528:
3529: sub goodbye {
3530: &logthis("Starting Shut down");
3531: &flushcourselogs();
3532: &logthis("Shutting down");
3533: }
3534:
3535: BEGIN {
3536: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3537: unless ($readit) {
3538: {
3539: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3540:
3541: while (my $configline=<$config>) {
3542: if ($configline =~ /^[^\#]*PerlSetVar/) {
3543: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3544: chomp($varvalue);
3545: $perlvar{$varname}=$varvalue;
3546: }
3547: }
3548: }
3549: {
3550: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3551:
3552: while (my $configline=<$config>) {
3553: if ($configline =~ /^[^\#]*PerlSetVar/) {
3554: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3555: chomp($varvalue);
3556: $perlvar{$varname}=$varvalue;
3557: }
3558: }
3559: }
3560:
3561: # ------------------------------------------------------------- Read hosts file
3562: {
3563: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3564:
3565: while (my $configline=<$config>) {
3566: next if ($configline =~ /^(\#|\s*$)/);
3567: chomp($configline);
3568: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3569: if ($id && $domain && $role && $name && $ip) {
3570: $hostname{$id}=$name;
3571: $hostdom{$id}=$domain;
3572: $hostip{$id}=$ip;
3573: $iphost{$ip}=$id;
3574: if ($domdescr) { $domaindescription{$domain}=$domdescr; }
3575: if ($role eq 'library') { $libserv{$id}=$name; }
3576: } else {
3577: if ($configline) {
3578: &logthis("Skipping hosts.tab line -$configline-");
3579: }
3580: }
3581: }
3582: }
3583:
3584: # ------------------------------------------------------ Read spare server file
3585: {
3586: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3587:
3588: while (my $configline=<$config>) {
3589: chomp($configline);
3590: if ($configline) {
3591: $spareid{$configline}=1;
3592: }
3593: }
3594: }
3595: # ------------------------------------------------------------ Read permissions
3596: {
3597: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3598:
3599: while (my $configline=<$config>) {
3600: chomp($configline);
3601: if ($configline) {
3602: my ($role,$perm)=split(/ /,$configline);
3603: if ($perm ne '') { $pr{$role}=$perm; }
3604: }
3605: }
3606: }
3607:
3608: # -------------------------------------------- Read plain texts for permissions
3609: {
3610: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3611:
3612: while (my $configline=<$config>) {
3613: chomp($configline);
3614: if ($configline) {
3615: my ($short,$plain)=split(/:/,$configline);
3616: if ($plain ne '') { $prp{$short}=$plain; }
3617: }
3618: }
3619: }
3620:
3621: # ---------------------------------------------------------- Read package table
3622: {
3623: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3624:
3625: while (my $configline=<$config>) {
3626: chomp($configline);
3627: my ($short,$plain)=split(/:/,$configline);
3628: my ($pack,$name)=split(/\&/,$short);
3629: if ($plain ne '') {
3630: $packagetab{$pack.'&'.$name.'&name'}=$name;
3631: $packagetab{$short}=$plain;
3632: }
3633: }
3634: }
3635:
3636: %metacache=();
3637:
3638: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
3639: $dumpcount=0;
3640:
3641: &logtouch();
3642: &logthis('<font color=yellow>INFO: Read configuration</font>');
3643: $readit=1;
3644: }
3645: }
3646:
3647: 1;
3648: __END__
3649:
3650: =pod
3651:
3652: =head1 NAME
3653:
3654: Apache::lonnet - Subroutines to ask questions about things in the network.
3655:
3656: =head1 SYNOPSIS
3657:
3658: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3659:
3660: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3661:
3662: Common parameters:
3663:
3664: =over 4
3665:
3666: =item *
3667:
3668: $uname : an internal username (if $cname expecting a course Id specifically)
3669:
3670: =item *
3671:
3672: $udom : a domain (if $cdom expecting a course's domain specifically)
3673:
3674: =item *
3675:
3676: $symb : a resource instance identifier
3677:
3678: =item *
3679:
3680: $namespace : the name of a .db file that contains the data needed or
3681: being set.
3682:
3683: =back
3684:
3685: =head1 INTRODUCTION
3686:
3687: This module provides subroutines which interact with the
3688: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3689: - classes
3690: - users
3691: - resources
3692:
3693: For many of these objects you can also use this to store data about
3694: them or modify them in various ways.
3695:
3696: This is part of the LearningOnline Network with CAPA project
3697: described at http://www.lon-capa.org.
3698:
3699: =head1 RETURN MESSAGES
3700:
3701: =over 4
3702:
3703: =item *
3704:
3705: con_lost : unable to contact remote host
3706:
3707: =item *
3708:
3709: con_delayed : unable to contact remote host, message will be delivered
3710: when the connection is brought back up
3711:
3712: =item *
3713:
3714: con_failed : unable to contact remote host and unable to save message
3715: for later delivery
3716:
3717: =item *
3718:
3719: error: : an error a occured, a description of the error follows the :
3720:
3721: =item *
3722:
3723: no_such_host : unable to fund a host associated with the user/domain
3724: that was requested
3725:
3726: =back
3727:
3728: =head1 PUBLIC SUBROUTINES
3729:
3730: =head2 Session Environment Functions
3731:
3732: =over 4
3733:
3734: =item *
3735:
3736: appenv(%hash) : the value of %hash is written to the user envirnoment
3737: file, and will be restored for each access this user makes during this
3738: session, also modifies the %ENV for the current process
3739:
3740: =item *
3741:
3742: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3743:
3744: =back
3745:
3746: =head2 User Information
3747:
3748: =over 4
3749:
3750: =item *
3751:
3752: queryauthenticate($uname,$udom) : try to determine user's current
3753: authentication scheme
3754:
3755: =item *
3756:
3757: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3758: servers (first use the current one), $upass should be the users password
3759:
3760: =item *
3761:
3762: homeserver($uname,$udom) : find the server which has the user's
3763: directory and files (there must be only one), this caches the answer,
3764: and also caches if there is a borken connection.
3765:
3766: =item *
3767:
3768: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3769: unique resource in a domain, there must be only 1 ID per username, and
3770: only 1 username per ID in a specific domain) (returns hash:
3771: id=>name,id=>name)
3772:
3773: =item *
3774:
3775: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3776: name=>id,name=>id)
3777:
3778: =item *
3779:
3780: idput($udom,%ids) : store away a list of names and associated IDs
3781:
3782: =item *
3783:
3784: rolesinit($udom,$username,$authhost) : get user privileges
3785:
3786: =item *
3787:
3788: usection($udom,$uname,$cname) : finds the section of student in the
3789: course $cname, return section name/number or '' for "not in course"
3790: and '-1' for "no section"
3791:
3792: =item *
3793:
3794: userenvironment($udom,$uname,@what) : gets the values of the keys
3795: passed in @what from the requested user's environment, returns a hash
3796:
3797: =back
3798:
3799: =head2 User Roles
3800:
3801: =over 4
3802:
3803: =item *
3804:
3805: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
3806: actions
3807: F: full access
3808: U,I,K: authentication modes (cxx only)
3809: '': forbidden
3810: 1: user needs to choose course
3811: 2: browse allowed
3812:
3813: =item *
3814:
3815: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
3816: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
3817: and course level
3818:
3819: =item *
3820:
3821: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
3822: explanation of a user role term
3823:
3824: =back
3825:
3826: =head2 User Modification
3827:
3828: =over 4
3829:
3830: =item *
3831:
3832: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
3833: user for the level given by URL. Optional start and end dates (leave empty
3834: string or zero for "no date")
3835:
3836: =item *
3837:
3838: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
3839: change a users, password, possible return values are: ok,
3840: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
3841: refused
3842:
3843: =item *
3844:
3845: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
3846:
3847: =item *
3848:
3849: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
3850: modify user
3851:
3852: =item *
3853:
3854: modifystudent
3855:
3856: modify a students enrollment and identification information.
3857: The course id is resolved based on the current users environment.
3858: This means the envoking user must be a course coordinator or otherwise
3859: associated with a course.
3860:
3861: This call is essentially a wrapper for lonnet::modifyuser and
3862: lonnet::modify_student_enrollment
3863:
3864: Inputs:
3865:
3866: =over 4
3867:
3868: =item B<$udom> Students loncapa domain
3869:
3870: =item B<$uname> Students loncapa login name
3871:
3872: =item B<$uid> Students id/student number
3873:
3874: =item B<$umode> Students authentication mode
3875:
3876: =item B<$upass> Students password
3877:
3878: =item B<$first> Students first name
3879:
3880: =item B<$middle> Students middle name
3881:
3882: =item B<$last> Students last name
3883:
3884: =item B<$gene> Students generation
3885:
3886: =item B<$usec> Students section in course
3887:
3888: =item B<$end> Unix time of the roles expiration
3889:
3890: =item B<$start> Unix time of the roles start date
3891:
3892: =item B<$forceid> If defined, allow $uid to be changed
3893:
3894: =item B<$desiredhome> server to use as home server for student
3895:
3896: =back
3897:
3898: =item *
3899:
3900: modify_student_enrollment
3901:
3902: Change a students enrollment status in a class. The environment variable
3903: 'role.request.course' must be defined for this function to proceed.
3904:
3905: Inputs:
3906:
3907: =over 4
3908:
3909: =item $udom, students domain
3910:
3911: =item $uname, students name
3912:
3913: =item $uid, students user id
3914:
3915: =item $first, students first name
3916:
3917: =item $middle
3918:
3919: =item $last
3920:
3921: =item $gene
3922:
3923: =item $usec
3924:
3925: =item $end
3926:
3927: =item $start
3928:
3929: =back
3930:
3931:
3932: =item *
3933:
3934: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
3935: custom role; give a custom role to a user for the level given by URL. Specify
3936: name and domain of role author, and role name
3937:
3938: =item *
3939:
3940: revokerole($udom,$uname,$url,$role) : revoke a role for url
3941:
3942: =item *
3943:
3944: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
3945:
3946: =back
3947:
3948: =head2 Course Infomation
3949:
3950: =over 4
3951:
3952: =item *
3953:
3954: coursedescription($courseid) : course description
3955:
3956: =item *
3957:
3958: courseresdata($coursenum,$coursedomain,@which) : request for current
3959: parameter setting for a specific course, @what should be a list of
3960: parameters to ask about. This routine caches answers for 5 minutes.
3961:
3962: =back
3963:
3964: =head2 Course Modification
3965:
3966: =over 4
3967:
3968: =item *
3969:
3970: writecoursepref($courseid,%prefs) : write preferences (environment
3971: database) for a course
3972:
3973: =item *
3974:
3975: createcourse($udom,$description,$url) : make/modify course
3976:
3977: =back
3978:
3979: =head2 Resource Subroutines
3980:
3981: =over 4
3982:
3983: =item *
3984:
3985: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
3986:
3987: =item *
3988:
3989: repcopy($filename) : subscribes to the requested file, and attempts to
3990: replicate from the owning library server, Might return
3991: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
3992: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
3993: resource. Expects the local filesystem pathname
3994: (/home/httpd/html/res/....)
3995:
3996: =back
3997:
3998: =head2 Resource Information
3999:
4000: =over 4
4001:
4002: =item *
4003:
4004: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4005: a vairety of different possible values, $varname should be a request
4006: string, and the other parameters can be used to specify who and what
4007: one is asking about.
4008:
4009: Possible values for $varname are environment.lastname (or other item
4010: from the envirnment hash), user.name (or someother aspect about the
4011: user), resource.0.maxtries (or some other part and parameter of a
4012: resource)
4013:
4014: =item *
4015:
4016: directcondval($number) : get current value of a condition; reads from a state
4017: string
4018:
4019: =item *
4020:
4021: condval($condidx) : value of condition index based on state
4022:
4023: =item *
4024:
4025: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4026: resource's metadata, $what should be either a specific key, or either
4027: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4028: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4029:
4030: this function automatically caches all requests
4031:
4032: =item *
4033:
4034: metadata_query($query,$custom,$customshow) : make a metadata query against the
4035: network of library servers; returns file handle of where SQL and regex results
4036: will be stored for query
4037:
4038: =item *
4039:
4040: symbread($filename) : return symbolic list entry (filename argument optional);
4041: returns the data handle
4042:
4043: =item *
4044:
4045: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4046: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4047: failure, user must be in a course, as it assumes the existance of the
4048: course initi hash, and uses $ENV('request.course.id'}
4049:
4050:
4051: =item *
4052:
4053: symbclean($symb) : removes versions numbers from a symb, returns the
4054: cleaned symb
4055:
4056: =item *
4057:
4058: is_on_map($uri) : checks if the $uri is somewhere on the current
4059: course map, user must be in a course for it to work.
4060:
4061: =item *
4062:
4063: numval($salt) : return random seed value (addend for rndseed)
4064:
4065: =item *
4066:
4067: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4068: a random seed, all arguments are optional, if they aren't sent it uses the
4069: environment to derive them. Note: if symb isn't sent and it can't get one
4070: from &symbread it will use the current time as its return value
4071:
4072: =item *
4073:
4074: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4075: unfakeable, receipt
4076:
4077: =item *
4078:
4079: receipt() : API to ireceipt working off of ENV values; given out to users
4080:
4081: =item *
4082:
4083: countacc($url) : count the number of accesses to a given URL
4084:
4085: =item *
4086:
4087: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4088:
4089: =item *
4090:
4091: checkin($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 $tcrsid)
4092:
4093: =item *
4094:
4095: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4096:
4097: =item *
4098:
4099: devalidate($symb) : devalidate temporary spreadsheet calculations,
4100: forcing spreadsheet to reevaluate the resource scores next time.
4101:
4102: =back
4103:
4104: =head2 Storing/Retreiving Data
4105:
4106: =over 4
4107:
4108: =item *
4109:
4110: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4111: for this url; hashref needs to be given and should be a \%hashname; the
4112: remaining args aren't required and if they aren't passed or are '' they will
4113: be derived from the ENV
4114:
4115: =item *
4116:
4117: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4118: uses critical subroutine
4119:
4120: =item *
4121:
4122: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4123: all args are optional
4124:
4125: =item *
4126:
4127: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4128: works very similar to store/cstore, but all data is stored in a
4129: temporary location and can be reset using tmpreset, $storehash should
4130: be a hash reference, returns nothing on success
4131:
4132: =item *
4133:
4134: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4135: similar to restore, but all data is stored in a temporary location and
4136: can be reset using tmpreset. Returns a hash of values on success,
4137: error string otherwise.
4138:
4139: =item *
4140:
4141: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4142: deltes all keys for $symb form the temporary storage hash.
4143:
4144: =item *
4145:
4146: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4147: reference filled in from namesp ($udom and $uname are optional)
4148:
4149: =item *
4150:
4151: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4152: namesp ($udom and $uname are optional)
4153:
4154: =item *
4155:
4156: dump($namespace,$udom,$uname,$regexp) :
4157: dumps the complete (or key matching regexp) namespace into a hash
4158: ($udom, $uname and $regexp are optional)
4159:
4160: =item *
4161:
4162: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4163: ($udom and $uname are optional)
4164:
4165: =item *
4166:
4167: cput($namespace,$storehash,$udom,$uname) : critical put
4168: ($udom and $uname are optional)
4169:
4170: =item *
4171:
4172: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4173: reference filled in from namesp (encrypts the return communication)
4174: ($udom and $uname are optional)
4175:
4176: =item *
4177:
4178: log($udom,$name,$home,$message) : write to permanent log for user; use
4179: critical subroutine
4180:
4181: =back
4182:
4183: =head2 Network Status Functions
4184:
4185: =over 4
4186:
4187: =item *
4188:
4189: dirlist($uri) : return directory list based on URI
4190:
4191: =item *
4192:
4193: spareserver() : find server with least workload from spare.tab
4194:
4195: =back
4196:
4197: =head2 Apache Request
4198:
4199: =over 4
4200:
4201: =item *
4202:
4203: ssi($url,%hash) : server side include, does a complete request cycle on url to
4204: localhost, posts hash
4205:
4206: =back
4207:
4208: =head2 Data to String to Data
4209:
4210: =over 4
4211:
4212: =item *
4213:
4214: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4215: and '&' separators, supports elements that are arrayrefs and hashrefs
4216:
4217: =item *
4218:
4219: hashref2str($hashref) : convert a hashref into a string complete with
4220: escaping and '=' and '&' separators, supports elements that are
4221: arrayrefs and hashrefs
4222:
4223: =item *
4224:
4225: arrayref2str($arrayref) : convert an arrayref into a string complete
4226: with escaping and '&' separators, supports elements that are arrayrefs
4227: and hashrefs
4228:
4229: =item *
4230:
4231: str2hash($string) : convert string to hash using unescaping and
4232: splitting on '=' and '&', supports elements that are arrayrefs and
4233: hashrefs
4234:
4235: =item *
4236:
4237: str2array($string) : convert string to hash using unescaping and
4238: splitting on '&', supports elements that are arrayrefs and hashrefs
4239:
4240: =back
4241:
4242: =head2 Logging Routines
4243:
4244: =over 4
4245:
4246: These routines allow one to make log messages in the lonnet.log and
4247: lonnet.perm logfiles.
4248:
4249: =item *
4250:
4251: logtouch() : make sure the logfile, lonnet.log, exists
4252:
4253: =item *
4254:
4255: logthis() : append message to the normal lonnet.log file, it gets
4256: preiodically rolled over and deleted.
4257:
4258: =item *
4259:
4260: logperm() : append a permanent message to lonnet.perm.log, this log
4261: file never gets deleted by any automated portion of the system, only
4262: messages of critical importance should go in here.
4263:
4264: =back
4265:
4266: =head2 General File Helper Routines
4267:
4268: =over 4
4269:
4270: =item *
4271:
4272: getfile($file) : returns the entire contents of a file or -1; it
4273: properly subscribes to and replicates the file if neccessary.
4274:
4275: =item *
4276:
4277: filelocation($dir,$file) : returns file system location of a file
4278: based on URI; meant to be "fairly clean" absolute reference, $dir is a
4279: directory that relative $file lookups are to looked in ($dir of /a/dir
4280: and a file of ../bob will become /a/bob)
4281:
4282: =item *
4283:
4284: hreflocation($dir,$file) : returns file system location or a URL; same as
4285: filelocation except for hrefs
4286:
4287: =item *
4288:
4289: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
4290:
4291: =back
4292:
4293: =head2 HTTP Helper Routines
4294:
4295: =over 4
4296:
4297: =item *
4298:
4299: escape() : unpack non-word characters into CGI-compatible hex codes
4300:
4301: =item *
4302:
4303: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
4304:
4305: =back
4306:
4307: =head1 PRIVATE SUBROUTINES
4308:
4309: =head2 Underlying communication routines (Shouldn't call)
4310:
4311: =over 4
4312:
4313: =item *
4314:
4315: subreply() : tries to pass a message to lonc, returns con_lost if incapable
4316:
4317: =item *
4318:
4319: reply() : uses subreply to send a message to remote machine, logs all failures
4320:
4321: =item *
4322:
4323: critical() : passes a critical message to another server; if cannot
4324: get through then place message in connection buffer directory and
4325: returns con_delayed, if incapable of saving message, returns
4326: con_failed
4327:
4328: =item *
4329:
4330: reconlonc() : tries to reconnect lonc client processes.
4331:
4332: =back
4333:
4334: =head2 Resource Access Logging
4335:
4336: =over 4
4337:
4338: =item *
4339:
4340: flushcourselogs() : flush (save) buffer logs and access logs
4341:
4342: =item *
4343:
4344: courselog($what) : save message for course in hash
4345:
4346: =item *
4347:
4348: courseacclog($what) : save message for course using &courselog(). Perform
4349: special processing for specific resource types (problems, exams, quizzes, etc).
4350:
4351: =item *
4352:
4353: goodbye() : flush course logs and log shutting down; it is called in srm.conf
4354: as a PerlChildExitHandler
4355:
4356: =back
4357:
4358: =head2 Other
4359:
4360: =over 4
4361:
4362: =item *
4363:
4364: symblist($mapname,%newhash) : update symbolic storage links
4365:
4366: =back
4367:
4368: =cut
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