1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.363 2003/04/18 13:47:55 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 3/2 Gerd Kortemeyer
51: # 3/19,3/20 Gerd Kortemeyer
52: # 5/26,5/28 Gerd Kortemeyer
53: # 5/30 H. K. Ng
54: # 6/1 Gerd Kortemeyer
55: # July Guy Albertelli
56: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
57: # 10/2 Gerd Kortemeyer
58: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
59: # 12/5 Matthew Hall
60: # 12/5 Guy Albertelli
61: # 12/6,12/7,12/12 Gerd Kortemeyer
62: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
63: # YEAR=2002
64: # 1/4,2/4,2/7 Gerd Kortemeyer
65: #
66: ###
67:
68: package Apache::lonnet;
69:
70: use strict;
71: use Apache::File;
72: use LWP::UserAgent();
73: use HTTP::Headers;
74: use vars
75: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
76: %libserv %pr %prp %metacache %packagetab %titlecache
77: %courselogs %accesshash %userrolehash $processmarker $dumpcount
78: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache
79: %domaindescription %domain_auth_def %domain_auth_arg_def $tmpdir);
80: use IO::Socket;
81: use GDBM_File;
82: use Apache::Constants qw(:common :http);
83: use HTML::LCParser;
84: use Fcntl qw(:flock);
85: use Apache::loncoursedata;
86:
87: my $readit;
88:
89: # --------------------------------------------------------------------- Logging
90:
91: sub logtouch {
92: my $execdir=$perlvar{'lonDaemons'};
93: unless (-e "$execdir/logs/lonnet.log") {
94: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
95: close $fh;
96: }
97: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
98: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
99: }
100:
101: sub logthis {
102: my $message=shift;
103: my $execdir=$perlvar{'lonDaemons'};
104: my $now=time;
105: my $local=localtime($now);
106: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
107: print $fh "$local ($$): $message\n";
108: return 1;
109: }
110:
111: sub logperm {
112: my $message=shift;
113: my $execdir=$perlvar{'lonDaemons'};
114: my $now=time;
115: my $local=localtime($now);
116: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
117: print $fh "$now:$message:$local\n";
118: return 1;
119: }
120:
121: # -------------------------------------------------- Non-critical communication
122: sub subreply {
123: my ($cmd,$server)=@_;
124: my $peerfile="$perlvar{'lonSockDir'}/$server";
125: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
126: Type => SOCK_STREAM,
127: Timeout => 10)
128: or return "con_lost";
129: print $client "$cmd\n";
130: my $answer=<$client>;
131: if (!$answer) { $answer="con_lost"; }
132: chomp($answer);
133: return $answer;
134: }
135:
136: sub reply {
137: my ($cmd,$server)=@_;
138: unless (defined($hostname{$server})) { return 'no_such_host'; }
139: my $answer=subreply($cmd,$server);
140: if ($answer eq 'con_lost') {
141: #sleep 5;
142: #$answer=subreply($cmd,$server);
143: #if ($answer eq 'con_lost') {
144: # &logthis("Second attempt con_lost on $server");
145: # my $peerfile="$perlvar{'lonSockDir'}/$server";
146: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
147: # Type => SOCK_STREAM,
148: # Timeout => 10)
149: # or return "con_lost";
150: # &logthis("Killing socket");
151: # print $client "close_connection_exit\n";
152: #sleep 5;
153: # $answer=subreply($cmd,$server);
154: #}
155: }
156: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
157: &logthis("<font color=blue>WARNING:".
158: " $cmd to $server returned $answer</font>");
159: }
160: return $answer;
161: }
162:
163: # ----------------------------------------------------------- Send USR1 to lonc
164:
165: sub reconlonc {
166: my $peerfile=shift;
167: &logthis("Trying to reconnect for $peerfile");
168: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
169: if (my $fh=Apache::File->new("$loncfile")) {
170: my $loncpid=<$fh>;
171: chomp($loncpid);
172: if (kill 0 => $loncpid) {
173: &logthis("lonc at pid $loncpid responding, sending USR1");
174: kill USR1 => $loncpid;
175: sleep 1;
176: if (-e "$peerfile") { return; }
177: &logthis("$peerfile still not there, give it another try");
178: sleep 5;
179: if (-e "$peerfile") { return; }
180: &logthis(
181: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
182: } else {
183: &logthis(
184: "<font color=blue>WARNING:".
185: " lonc at pid $loncpid not responding, giving up</font>");
186: }
187: } else {
188: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
189: }
190: }
191:
192: # ------------------------------------------------------ Critical communication
193:
194: sub critical {
195: my ($cmd,$server)=@_;
196: unless ($hostname{$server}) {
197: &logthis("<font color=blue>WARNING:".
198: " Critical message to unknown server ($server)</font>");
199: return 'no_such_host';
200: }
201: my $answer=reply($cmd,$server);
202: if ($answer eq 'con_lost') {
203: my $pingreply=reply('ping',$server);
204: &reconlonc("$perlvar{'lonSockDir'}/$server");
205: my $pongreply=reply('pong',$server);
206: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
207: $answer=reply($cmd,$server);
208: if ($answer eq 'con_lost') {
209: my $now=time;
210: my $middlename=$cmd;
211: $middlename=substr($middlename,0,16);
212: $middlename=~s/\W//g;
213: my $dfilename=
214: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
215: $dumpcount++;
216: {
217: my $dfh;
218: if ($dfh=Apache::File->new(">$dfilename")) {
219: print $dfh "$cmd\n";
220: }
221: }
222: sleep 2;
223: my $wcmd='';
224: {
225: my $dfh;
226: if ($dfh=Apache::File->new("$dfilename")) {
227: $wcmd=<$dfh>;
228: }
229: }
230: chomp($wcmd);
231: if ($wcmd eq $cmd) {
232: &logthis("<font color=blue>WARNING: ".
233: "Connection buffer $dfilename: $cmd</font>");
234: &logperm("D:$server:$cmd");
235: return 'con_delayed';
236: } else {
237: &logthis("<font color=red>CRITICAL:"
238: ." Critical connection failed: $server $cmd</font>");
239: &logperm("F:$server:$cmd");
240: return 'con_failed';
241: }
242: }
243: }
244: return $answer;
245: }
246:
247: # ---------------------------------------------------------- Append Environment
248:
249: sub appenv {
250: my %newenv=@_;
251: foreach (keys %newenv) {
252: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
253: &logthis("<font color=blue>WARNING: ".
254: "Attempt to modify environment ".$_." to ".$newenv{$_}
255: .'</font>');
256: delete($newenv{$_});
257: } else {
258: $ENV{$_}=$newenv{$_};
259: }
260: }
261:
262: my $lockfh;
263: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
264: return 'error: '.$!;
265: }
266: unless (flock($lockfh,LOCK_EX)) {
267: &logthis("<font color=blue>WARNING: ".
268: 'Could not obtain exclusive lock in appenv: '.$!);
269: $lockfh->close();
270: return 'error: '.$!;
271: }
272:
273: my @oldenv;
274: {
275: my $fh;
276: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
277: return 'error: '.$!;
278: }
279: @oldenv=<$fh>;
280: $fh->close();
281: }
282: for (my $i=0; $i<=$#oldenv; $i++) {
283: chomp($oldenv[$i]);
284: if ($oldenv[$i] ne '') {
285: my ($name,$value)=split(/=/,$oldenv[$i]);
286: unless (defined($newenv{$name})) {
287: $newenv{$name}=$value;
288: }
289: }
290: }
291: {
292: my $fh;
293: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
294: return 'error';
295: }
296: my $newname;
297: foreach $newname (keys %newenv) {
298: print $fh "$newname=$newenv{$newname}\n";
299: }
300: $fh->close();
301: }
302:
303: $lockfh->close();
304: return 'ok';
305: }
306: # ----------------------------------------------------- Delete from Environment
307:
308: sub delenv {
309: my $delthis=shift;
310: my %newenv=();
311: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
312: &logthis("<font color=blue>WARNING: ".
313: "Attempt to delete from environment ".$delthis);
314: return 'error';
315: }
316: my @oldenv;
317: {
318: my $fh;
319: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
320: return 'error';
321: }
322: unless (flock($fh,LOCK_SH)) {
323: &logthis("<font color=blue>WARNING: ".
324: 'Could not obtain shared lock in delenv: '.$!);
325: $fh->close();
326: return 'error: '.$!;
327: }
328: @oldenv=<$fh>;
329: $fh->close();
330: }
331: {
332: my $fh;
333: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
334: return 'error';
335: }
336: unless (flock($fh,LOCK_EX)) {
337: &logthis("<font color=blue>WARNING: ".
338: 'Could not obtain exclusive lock in delenv: '.$!);
339: $fh->close();
340: return 'error: '.$!;
341: }
342: foreach (@oldenv) {
343: unless ($_=~/^$delthis/) { print $fh $_; }
344: }
345: $fh->close();
346: }
347: return 'ok';
348: }
349:
350: # ------------------------------------------ Fight off request when overloaded
351:
352: sub overloaderror {
353: my ($r,$checkserver)=@_;
354: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
355: my $loadavg;
356: if ($checkserver eq $perlvar{'lonHostID'}) {
357: my $loadfile=Apache::File->new('/proc/loadavg');
358: $loadavg=<$loadfile>;
359: $loadavg =~ s/\s.*//g;
360: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
361: } else {
362: $loadavg=&reply('load',$checkserver);
363: }
364: my $overload=$loadavg-100;
365: if ($overload>0) {
366: $r->err_headers_out->{'Retry-After'}=$overload;
367: $r->log_error('Overload of '.$overload.' on '.$checkserver);
368: return 413;
369: }
370: return '';
371: }
372:
373: # ------------------------------ Find server with least workload from spare.tab
374:
375: sub spareserver {
376: my $loadpercent = shift;
377: my $tryserver;
378: my $spareserver='';
379: my $lowestserver=$loadpercent;
380: foreach $tryserver (keys %spareid) {
381: my $answer=reply('load',$tryserver);
382: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
383: $spareserver="http://$hostname{$tryserver}";
384: $lowestserver=$answer;
385: }
386: }
387: return $spareserver;
388: }
389:
390: # --------------------------------------------- Try to change a user's password
391:
392: sub changepass {
393: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
394: $currentpass = &escape($currentpass);
395: $newpass = &escape($newpass);
396: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
397: $server);
398: if (! $answer) {
399: &logthis("No reply on password change request to $server ".
400: "by $uname in domain $udom.");
401: } elsif ($answer =~ "^ok") {
402: &logthis("$uname in $udom successfully changed their password ".
403: "on $server.");
404: } elsif ($answer =~ "^pwchange_failure") {
405: &logthis("$uname in $udom was unable to change their password ".
406: "on $server. The action was blocked by either lcpasswd ".
407: "or pwchange");
408: } elsif ($answer =~ "^non_authorized") {
409: &logthis("$uname in $udom did not get their password correct when ".
410: "attempting to change it on $server.");
411: } elsif ($answer =~ "^auth_mode_error") {
412: &logthis("$uname in $udom attempted to change their password despite ".
413: "not being locally or internally authenticated on $server.");
414: } elsif ($answer =~ "^unknown_user") {
415: &logthis("$uname in $udom attempted to change their password ".
416: "on $server but were unable to because $server is not ".
417: "their home server.");
418: } elsif ($answer =~ "^refused") {
419: &logthis("$server refused to change $uname in $udom password because ".
420: "it was sent an unencrypted request to change the password.");
421: }
422: return $answer;
423: }
424:
425: # ----------------------- Try to determine user's current authentication scheme
426:
427: sub queryauthenticate {
428: my ($uname,$udom)=@_;
429: if (($perlvar{'lonRole'} eq 'library') &&
430: ($udom eq $perlvar{'lonDefDomain'})) {
431: my $answer=reply("encrypt:currentauth:$udom:$uname",
432: $perlvar{'lonHostID'});
433: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
434: if (length($answer)) {
435: return $answer;
436: }
437: else {
438: &logthis("User $uname at $udom lacks an authentication mechanism");
439: return 'no_host';
440: }
441: }
442: }
443:
444: my $tryserver;
445: foreach $tryserver (keys %libserv) {
446: if ($hostdom{$tryserver} eq $udom) {
447: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
448: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
449: if (length($answer)) {
450: return $answer;
451: }
452: else {
453: &logthis("User $uname at $udom lacks an authentication mechanism");
454: return 'no_host';
455: }
456: }
457: }
458: }
459: &logthis("User $uname at $udom lacks an authentication mechanism");
460: return 'no_host';
461: }
462:
463: # --------- Try to authenticate user from domain's lib servers (first this one)
464:
465: sub authenticate {
466: my ($uname,$upass,$udom)=@_;
467: $upass=escape($upass);
468: $uname=~s/\W//g;
469: if (($perlvar{'lonRole'} eq 'library') &&
470: ($udom eq $perlvar{'lonDefDomain'})) {
471: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
472: if ($answer =~ /authorized/) {
473: if ($answer eq 'authorized') {
474: &logthis("User $uname at $udom authorized by local server");
475: return $perlvar{'lonHostID'};
476: }
477: if ($answer eq 'non_authorized') {
478: &logthis("User $uname at $udom rejected by local server");
479: return 'no_host';
480: }
481: }
482: }
483:
484: my $tryserver;
485: foreach $tryserver (keys %libserv) {
486: if ($hostdom{$tryserver} eq $udom) {
487: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
488: if ($answer =~ /authorized/) {
489: if ($answer eq 'authorized') {
490: &logthis("User $uname at $udom authorized by $tryserver");
491: return $tryserver;
492: }
493: if ($answer eq 'non_authorized') {
494: &logthis("User $uname at $udom rejected by $tryserver");
495: return 'no_host';
496: }
497: }
498: }
499: }
500: &logthis("User $uname at $udom could not be authenticated");
501: return 'no_host';
502: }
503:
504: # ---------------------- Find the homebase for a user from domain's lib servers
505:
506: sub homeserver {
507: my ($uname,$udom,$ignoreBadCache)=@_;
508: my $index="$uname:$udom";
509: if ($homecache{$index}) {
510: return "$homecache{$index}";
511: }
512: my $tryserver;
513: foreach $tryserver (keys %libserv) {
514: next if ($ignoreBadCache ne 'true' &&
515: exists($badServerCache{$tryserver}));
516: if ($hostdom{$tryserver} eq $udom) {
517: my $answer=reply("home:$udom:$uname",$tryserver);
518: if ($answer eq 'found') {
519: $homecache{$index}=$tryserver;
520: return $tryserver;
521: } elsif ($answer eq 'no_host') {
522: $badServerCache{$tryserver}=1;
523: }
524: }
525: }
526: return 'no_host';
527: }
528:
529: # ------------------------------------- Find the usernames behind a list of IDs
530:
531: sub idget {
532: my ($udom,@ids)=@_;
533: my %returnhash=();
534:
535: my $tryserver;
536: foreach $tryserver (keys %libserv) {
537: if ($hostdom{$tryserver} eq $udom) {
538: my $idlist=join('&',@ids);
539: $idlist=~tr/A-Z/a-z/;
540: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
541: my @answer=();
542: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
543: @answer=split(/\&/,$reply);
544: } ;
545: my $i;
546: for ($i=0;$i<=$#ids;$i++) {
547: if ($answer[$i]) {
548: $returnhash{$ids[$i]}=$answer[$i];
549: }
550: }
551: }
552: }
553: return %returnhash;
554: }
555:
556: # ------------------------------------- Find the IDs behind a list of usernames
557:
558: sub idrget {
559: my ($udom,@unames)=@_;
560: my %returnhash=();
561: foreach (@unames) {
562: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
563: }
564: return %returnhash;
565: }
566:
567: # ------------------------------- Store away a list of names and associated IDs
568:
569: sub idput {
570: my ($udom,%ids)=@_;
571: my %servers=();
572: foreach (keys %ids) {
573: my $uhom=&homeserver($_,$udom);
574: if ($uhom ne 'no_host') {
575: my $id=&escape($ids{$_});
576: $id=~tr/A-Z/a-z/;
577: my $unam=&escape($_);
578: if ($servers{$uhom}) {
579: $servers{$uhom}.='&'.$id.'='.$unam;
580: } else {
581: $servers{$uhom}=$id.'='.$unam;
582: }
583: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
584: }
585: }
586: foreach (keys %servers) {
587: &critical('idput:'.$udom.':'.$servers{$_},$_);
588: }
589: }
590:
591: # --------------------------------------------------- Assign a key to a student
592:
593: sub assign_access_key {
594: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
595: $cdom=
596: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
597: $cnum=
598: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
599: $udom=$ENV{'user.name'} unless (defined($udom));
600: $uname=$ENV{'user.domain'} unless (defined($uname));
601: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
602: if (($existing{$ckey}=~/^\d+$/) || # has time - new key
603: ($existing{$ckey} eq $uname.':'.$udom)) { # this should not happen,
604: # unless something went wrong
605: # the first time around
606: # ready to assign
607: } elsif (!$existing{$ckey}) {
608: if (&put('accesskey',{$ckey=>$uname.':'.$udom},$cdom,$cnum) eq 'ok') {
609: # key now belongs to user
610: my $envkey='key.'.$cdom.'_'.$cnum;
611: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
612: &appenv('environment.'.$envkey => $ckey);
613: return 'ok';
614: } else {
615: return
616: 'error: Count not permanently assign key, will need to be re-entered later.';
617: }
618: } else {
619: return 'error: Could not assign key, try again later.';
620: }
621: # the key does not exist
622: return 'error: The key does not exist';
623: } else {
624: # the key is somebody else's
625: return 'error: The key is already in use';
626: }
627: }
628:
629: # ------------------------------------------------------ Generate a set of keys
630:
631: sub generate_access_keys {
632: my ($number,$cdom,$cnum)=@_;
633: $cdom=
634: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
635: $cnum=
636: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
637: unless (&allowed('mky',$cdom)) { return 0; }
638: unless (($cdom) && ($cnum)) { return 0; }
639: if ($number>10000) { return 0; }
640: sleep(2); # make sure don't get same seed twice
641: srand(time()^($$+($$<<15))); # from "Programming Perl"
642: my $total=0;
643: for (my $i=1;$i<=$number;$i++) {
644: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
645: sprintf("%lx",int(100000*rand)).'-'.
646: sprintf("%lx",int(100000*rand));
647: $newkey=~s/1/g/g; # folks mix up 1 and l
648: $newkey=~s/0/h/g; # and also 0 and O
649: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
650: if ($existing{$newkey}) {
651: $i--;
652: } else {
653: if (&put('accesskeys',{ $newkey => time() },$cdom,$cnum) eq 'ok') {
654: $total++;
655: }
656: }
657: }
658: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
659: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
660: return $total;
661: }
662:
663: # ------------------------------------------------------- Validate an accesskey
664:
665: sub validate_access_key {
666: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
667: $cdom=
668: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
669: $cnum=
670: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
671: $udom=$ENV{'user.name'} unless (defined($udom));
672: $uname=$ENV{'user.domain'} unless (defined($uname));
673: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
674: return ($existing{$ckey} eq $uname.':'.$udom);
675: }
676:
677: # ------------------------------------- Find the section of student in a course
678:
679: sub getsection {
680: my ($udom,$unam,$courseid)=@_;
681: $courseid=~s/\_/\//g;
682: $courseid=~s/^(\w)/\/$1/;
683: my %Pending;
684: my %Expired;
685: #
686: # Each role can either have not started yet (pending), be active,
687: # or have expired.
688: #
689: # If there is an active role, we are done.
690: #
691: # If there is more than one role which has not started yet,
692: # choose the one which will start sooner
693: # If there is one role which has not started yet, return it.
694: #
695: # If there is more than one expired role, choose the one which ended last.
696: # If there is a role which has expired, return it.
697: #
698: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
699: &homeserver($unam,$udom)))) {
700: my ($key,$value)=split(/\=/,$_);
701: $key=&unescape($key);
702: next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
703: my $section=$1;
704: if ($key eq $courseid.'_st') { $section=''; }
705: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
706: my $now=time;
707: if (defined($end) && ($now > $end)) {
708: $Expired{$end}=$section;
709: next;
710: }
711: if (defined($start) && ($now < $start)) {
712: $Pending{$start}=$section;
713: next;
714: }
715: return $section;
716: }
717: #
718: # Presumedly there will be few matching roles from the above
719: # loop and the sorting time will be negligible.
720: if (scalar(keys(%Pending))) {
721: my ($time) = sort {$a <=> $b} keys(%Pending);
722: return $Pending{$time};
723: }
724: if (scalar(keys(%Expired))) {
725: my @sorted = sort {$a <=> $b} keys(%Expired);
726: my $time = pop(@sorted);
727: return $Expired{$time};
728: }
729: return '-1';
730: }
731:
732: sub usection {
733: my ($udom,$unam,$courseid)=@_;
734: $courseid=~s/\_/\//g;
735: $courseid=~s/^(\w)/\/$1/;
736: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
737: &homeserver($unam,$udom)))) {
738: my ($key,$value)=split(/\=/,$_);
739: $key=&unescape($key);
740: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
741: my $section=$1;
742: if ($key eq $courseid.'_st') { $section=''; }
743: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
744: my $now=time;
745: my $notactive=0;
746: if ($start) {
747: if ($now<$start) { $notactive=1; }
748: }
749: if ($end) {
750: if ($now>$end) { $notactive=1; }
751: }
752: unless ($notactive) { return $section; }
753: }
754: }
755: return '-1';
756: }
757:
758: # ------------------------------------- Read an entry from a user's environment
759:
760: sub userenvironment {
761: my ($udom,$unam,@what)=@_;
762: my %returnhash=();
763: my @answer=split(/\&/,
764: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
765: &homeserver($unam,$udom)));
766: my $i;
767: for ($i=0;$i<=$#what;$i++) {
768: $returnhash{$what[$i]}=&unescape($answer[$i]);
769: }
770: return %returnhash;
771: }
772:
773: # -------------------------------------------------------------------- New chat
774:
775: sub chatsend {
776: my ($newentry,$anon)=@_;
777: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
778: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
779: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
780: &reply('chatsend:'.$cdom.':'.$cnum.':'.
781: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
782: &escape($newentry)),$chome);
783: }
784:
785: # ------------------------------------------ Find current version of a resource
786:
787: sub getversion {
788: my $fname=&clutter(shift);
789: unless ($fname=~/^\/res\//) { return -1; }
790: return ¤tversion(&filelocation('',$fname));
791: }
792:
793: sub currentversion {
794: my $fname=shift;
795: my $author=$fname;
796: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
797: my ($udom,$uname)=split(/\//,$author);
798: my $home=homeserver($uname,$udom);
799: if ($home eq 'no_host') {
800: return -1;
801: }
802: my $answer=reply("currentversion:$fname",$home);
803: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
804: return -1;
805: }
806: return $answer;
807: }
808:
809: # ----------------------------- Subscribe to a resource, return URL if possible
810:
811: sub subscribe {
812: my $fname=shift;
813: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
814: my $author=$fname;
815: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
816: my ($udom,$uname)=split(/\//,$author);
817: my $home=homeserver($uname,$udom);
818: if ($home eq 'no_host') {
819: return 'not_found';
820: }
821: my $answer=reply("sub:$fname",$home);
822: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
823: $answer.=' by '.$home;
824: }
825: return $answer;
826: }
827:
828: # -------------------------------------------------------------- Replicate file
829:
830: sub repcopy {
831: my $filename=shift;
832: $filename=~s/\/+/\//g;
833: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
834: my $transname="$filename.in.transfer";
835: if ((-e $filename) || (-e $transname)) { return OK; }
836: my $remoteurl=subscribe($filename);
837: if ($remoteurl =~ /^con_lost by/) {
838: &logthis("Subscribe returned $remoteurl: $filename");
839: return HTTP_SERVICE_UNAVAILABLE;
840: } elsif ($remoteurl eq 'not_found') {
841: &logthis("Subscribe returned not_found: $filename");
842: return HTTP_NOT_FOUND;
843: } elsif ($remoteurl =~ /^rejected by/) {
844: &logthis("Subscribe returned $remoteurl: $filename");
845: return FORBIDDEN;
846: } elsif ($remoteurl eq 'directory') {
847: return OK;
848: } else {
849: my $author=$filename;
850: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
851: my ($udom,$uname)=split(/\//,$author);
852: my $home=homeserver($uname,$udom);
853: unless ($home eq $perlvar{'lonHostID'}) {
854: my @parts=split(/\//,$filename);
855: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
856: if ($path ne "$perlvar{'lonDocRoot'}/res") {
857: &logthis("Malconfiguration for replication: $filename");
858: return HTTP_BAD_REQUEST;
859: }
860: my $count;
861: for ($count=5;$count<$#parts;$count++) {
862: $path.="/$parts[$count]";
863: if ((-e $path)!=1) {
864: mkdir($path,0777);
865: }
866: }
867: my $ua=new LWP::UserAgent;
868: my $request=new HTTP::Request('GET',"$remoteurl");
869: my $response=$ua->request($request,$transname);
870: if ($response->is_error()) {
871: unlink($transname);
872: my $message=$response->status_line;
873: &logthis("<font color=blue>WARNING:"
874: ." LWP get: $message: $filename</font>");
875: return HTTP_SERVICE_UNAVAILABLE;
876: } else {
877: if ($remoteurl!~/\.meta$/) {
878: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
879: my $mresponse=$ua->request($mrequest,$filename.'.meta');
880: if ($mresponse->is_error()) {
881: unlink($filename.'.meta');
882: &logthis(
883: "<font color=yellow>INFO: No metadata: $filename</font>");
884: }
885: }
886: rename($transname,$filename);
887: return OK;
888: }
889: }
890: }
891: }
892:
893: # ------------------------------------------------ Get server side include body
894: sub ssi_body {
895: my $filelink=shift;
896: my $output=($filelink=~/^http\:/?&externalssi($filelink):
897: &ssi($filelink));
898: $output=~s/^.*\<body[^\>]*\>//si;
899: $output=~s/\<\/body\s*\>.*$//si;
900: $output=~
901: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
902: return $output;
903: }
904:
905: # --------------------------------------------------------- Server Side Include
906:
907: sub ssi {
908:
909: my ($fn,%form)=@_;
910:
911: my $ua=new LWP::UserAgent;
912:
913: my $request;
914:
915: if (%form) {
916: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
917: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
918: } else {
919: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
920: }
921:
922: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
923: my $response=$ua->request($request);
924:
925: return $response->content;
926: }
927:
928: sub externalssi {
929: my ($url)=@_;
930: my $ua=new LWP::UserAgent;
931: my $request=new HTTP::Request('GET',$url);
932: my $response=$ua->request($request);
933: return $response->content;
934: }
935:
936: # ------- Add a token to a remote URI's query string to vouch for access rights
937:
938: sub tokenwrapper {
939: my $uri=shift;
940: $uri=~s/^http\:\/\/([^\/]+)//;
941: $uri=~s/^\///;
942: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
943: my $token=$1;
944: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
945: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
946: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
947: (($uri=~/\?/)?'&':'?').'token='.$token.
948: '&tokenissued='.$perlvar{'lonHostID'};
949: } else {
950: return '/adm/notfound.html';
951: }
952: }
953:
954: # --------------- Take an uploaded file and put it into the userfiles directory
955: # input: name of form element, coursedoc=1 means this is for the course
956: # output: url of file in userspace
957:
958: sub userfileupload {
959: my ($formname,$coursedoc)=@_;
960: my $fname=$ENV{'form.'.$formname.'.filename'};
961: # Replace Windows backslashes by forward slashes
962: $fname=~s/\\/\//g;
963: # Get rid of everything but the actual filename
964: $fname=~s/^.*\/([^\/]+)$/$1/;
965: # Replace spaces by underscores
966: $fname=~s/\s+/\_/g;
967: # Replace all other weird characters by nothing
968: $fname=~s/[^\w\.\-]//g;
969: # See if there is anything left
970: unless ($fname) { return 'error: no uploaded file'; }
971: chop($ENV{'form.'.$formname});
972: # Create the directory if not present
973: my $docuname='';
974: my $docudom='';
975: my $docuhome='';
976: if ($coursedoc) {
977: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
978: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
979: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
980: } else {
981: $docuname=$ENV{'user.name'};
982: $docudom=$ENV{'user.domain'};
983: $docuhome=$ENV{'user.home'};
984: }
985: return
986: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
987: }
988:
989: sub finishuserfileupload {
990: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
991: my $path=$docudom.'/'.$docuname.'/';
992: my $filepath=$perlvar{'lonDocRoot'};
993: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
994: my $count;
995: for ($count=4;$count<=$#parts;$count++) {
996: $filepath.="/$parts[$count]";
997: if ((-e $filepath)!=1) {
998: mkdir($filepath,0777);
999: }
1000: }
1001: # Save the file
1002: {
1003: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
1004: print $fh $ENV{'form.'.$formname};
1005: }
1006: # Notify homeserver to grep it
1007: #
1008:
1009: my $fetchresult=
1010: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
1011: if ($fetchresult eq 'ok') {
1012: #
1013: # Return the URL to it
1014: return '/uploaded/'.$path.$fname;
1015: } else {
1016: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1017: ' to host '.$docuhome.': '.$fetchresult);
1018: return '/adm/notfound.html';
1019: }
1020: }
1021:
1022: # ------------------------------------------------------------------------- Log
1023:
1024: sub log {
1025: my ($dom,$nam,$hom,$what)=@_;
1026: return critical("log:$dom:$nam:$what",$hom);
1027: }
1028:
1029: # ------------------------------------------------------------------ Course Log
1030: #
1031: # This routine flushes several buffers of non-mission-critical nature
1032: #
1033:
1034: sub flushcourselogs {
1035: &logthis('Flushing log buffers');
1036: #
1037: # course logs
1038: # This is a log of all transactions in a course, which can be used
1039: # for data mining purposes
1040: #
1041: # It also collects the courseid database, which lists last transaction
1042: # times and course titles for all courseids
1043: #
1044: my %courseidbuffer=();
1045: foreach (keys %courselogs) {
1046: my $crsid=$_;
1047: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1048: &escape($courselogs{$crsid}),
1049: $coursehombuf{$crsid}) eq 'ok') {
1050: delete $courselogs{$crsid};
1051: } else {
1052: &logthis('Failed to flush log buffer for '.$crsid);
1053: if (length($courselogs{$crsid})>40000) {
1054: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1055: " exceeded maximum size, deleting.</font>");
1056: delete $courselogs{$crsid};
1057: }
1058: }
1059: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1060: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1061: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1062: } else {
1063: $courseidbuffer{$coursehombuf{$crsid}}=
1064: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1065: }
1066: }
1067: #
1068: # Write course id database (reverse lookup) to homeserver of courses
1069: # Is used in pickcourse
1070: #
1071: foreach (keys %courseidbuffer) {
1072: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1073: }
1074: #
1075: # File accesses
1076: # Writes to the dynamic metadata of resources to get hit counts, etc.
1077: #
1078: foreach (keys %accesshash) {
1079: my $entry=$_;
1080: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
1081: my %temphash=($entry => $accesshash{$entry});
1082: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
1083: delete $accesshash{$entry};
1084: }
1085: }
1086: #
1087: # Roles
1088: # Reverse lookup of user roles for course faculty/staff and co-authorship
1089: #
1090: foreach (keys %userrolehash) {
1091: my $entry=$_;
1092: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1093: split(/\:/,$entry);
1094: if (&Apache::lonnet::put('nohist_userroles',
1095: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1096: $rudom,$runame) eq 'ok') {
1097: delete $userrolehash{$entry};
1098: }
1099: }
1100: $dumpcount++;
1101: }
1102:
1103: sub courselog {
1104: my $what=shift;
1105: $what=time.':'.$what;
1106: unless ($ENV{'request.course.id'}) { return ''; }
1107: $coursedombuf{$ENV{'request.course.id'}}=
1108: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1109: $coursenumbuf{$ENV{'request.course.id'}}=
1110: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1111: $coursehombuf{$ENV{'request.course.id'}}=
1112: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1113: $coursedescrbuf{$ENV{'request.course.id'}}=
1114: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1115: if (defined $courselogs{$ENV{'request.course.id'}}) {
1116: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1117: } else {
1118: $courselogs{$ENV{'request.course.id'}}.=$what;
1119: }
1120: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1121: &flushcourselogs();
1122: }
1123: }
1124:
1125: sub courseacclog {
1126: my $fnsymb=shift;
1127: unless ($ENV{'request.course.id'}) { return ''; }
1128: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1129: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
1130: $what.=':POST';
1131: foreach (keys %ENV) {
1132: if ($_=~/^form\.(.*)/) {
1133: $what.=':'.$1.'='.$ENV{$_};
1134: }
1135: }
1136: }
1137: &courselog($what);
1138: }
1139:
1140: sub countacc {
1141: my $url=&declutter(shift);
1142: unless ($ENV{'request.course.id'}) { return ''; }
1143: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1144: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1145: if (defined($accesshash{$key})) {
1146: $accesshash{$key}++;
1147: } else {
1148: $accesshash{$key}=1;
1149: }
1150: }
1151:
1152: sub linklog {
1153: my ($from,$to)=@_;
1154: $from=&declutter($from);
1155: $to=&declutter($to);
1156: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1157: $accesshash{$to.'___'.$from.'___goto'}=1;
1158: }
1159:
1160: sub userrolelog {
1161: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1162: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1163: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1164: ($trole=~/^cr/)) {
1165: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1166: $userrolehash
1167: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1168: =$tend.':'.$tstart;
1169: }
1170: }
1171:
1172: sub get_course_adv_roles {
1173: my $cid=shift;
1174: $cid=$ENV{'request.course.id'} unless (defined($cid));
1175: my %coursehash=&coursedescription($cid);
1176: my %returnhash=();
1177: my %dumphash=
1178: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1179: my $now=time;
1180: foreach (keys %dumphash) {
1181: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1182: if (($tstart) && ($tstart<0)) { next; }
1183: if (($tend) && ($tend<$now)) { next; }
1184: if (($tstart) && ($now<$tstart)) { next; }
1185: my ($role,$username,$domain,$section)=split(/\:/,$_);
1186: my $key=&plaintext($role);
1187: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1188: if ($returnhash{$key}) {
1189: $returnhash{$key}.=','.$username.':'.$domain;
1190: } else {
1191: $returnhash{$key}=$username.':'.$domain;
1192: }
1193: }
1194: return sort %returnhash;
1195: }
1196:
1197: # ---------------------------------------------------------- Course ID routines
1198: # Deal with domain's nohist_courseid.db files
1199: #
1200:
1201: sub courseidput {
1202: my ($domain,$what,$coursehome)=@_;
1203: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1204: }
1205:
1206: sub courseiddump {
1207: my ($domfilter,$descfilter,$sincefilter)=@_;
1208: my %returnhash=();
1209: unless ($domfilter) { $domfilter=''; }
1210: foreach my $tryserver (keys %libserv) {
1211: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1212: foreach (
1213: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1214: $sincefilter.':'.&escape($descfilter),
1215: $tryserver))) {
1216: my ($key,$value)=split(/\=/,$_);
1217: if (($key) && ($value)) {
1218: $returnhash{&unescape($key)}=&unescape($value);
1219: }
1220: }
1221:
1222: }
1223: }
1224: return %returnhash;
1225: }
1226:
1227: #
1228: # ----------------------------------------------------------- Check out an item
1229:
1230: sub checkout {
1231: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1232: my $now=time;
1233: my $lonhost=$perlvar{'lonHostID'};
1234: my $infostr=&escape(
1235: 'CHECKOUTTOKEN&'.
1236: $tuname.'&'.
1237: $tudom.'&'.
1238: $tcrsid.'&'.
1239: $symb.'&'.
1240: $now.'&'.$ENV{'REMOTE_ADDR'});
1241: my $token=&reply('tmpput:'.$infostr,$lonhost);
1242: if ($token=~/^error\:/) {
1243: &logthis("<font color=blue>WARNING: ".
1244: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1245: "</font>");
1246: return '';
1247: }
1248:
1249: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1250: $token=~tr/a-z/A-Z/;
1251:
1252: my %infohash=('resource.0.outtoken' => $token,
1253: 'resource.0.checkouttime' => $now,
1254: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1255:
1256: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1257: return '';
1258: } else {
1259: &logthis("<font color=blue>WARNING: ".
1260: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1261: "</font>");
1262: }
1263:
1264: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1265: &escape('Checkout '.$infostr.' - '.
1266: $token)) ne 'ok') {
1267: return '';
1268: } else {
1269: &logthis("<font color=blue>WARNING: ".
1270: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1271: "</font>");
1272: }
1273: return $token;
1274: }
1275:
1276: # ------------------------------------------------------------ Check in an item
1277:
1278: sub checkin {
1279: my $token=shift;
1280: my $now=time;
1281: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1282: $lonhost=~tr/A-Z/a-z/;
1283: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1284: $dtoken=~s/\W/\_/g;
1285: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1286: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1287:
1288: unless (($tuname) && ($tudom)) {
1289: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1290: return '';
1291: }
1292:
1293: unless (&allowed('mgr',$tcrsid)) {
1294: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1295: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1296: return '';
1297: }
1298:
1299: my %infohash=('resource.0.intoken' => $token,
1300: 'resource.0.checkintime' => $now,
1301: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1302:
1303: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1304: return '';
1305: }
1306:
1307: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1308: &escape('Checkin - '.$token)) ne 'ok') {
1309: return '';
1310: }
1311:
1312: return ($symb,$tuname,$tudom,$tcrsid);
1313: }
1314:
1315: # --------------------------------------------- Set Expire Date for Spreadsheet
1316:
1317: sub expirespread {
1318: my ($uname,$udom,$stype,$usymb)=@_;
1319: my $cid=$ENV{'request.course.id'};
1320: if ($cid) {
1321: my $now=time;
1322: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1323: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1324: $ENV{'course.'.$cid.'.num'}.
1325: ':nohist_expirationdates:'.
1326: &escape($key).'='.$now,
1327: $ENV{'course.'.$cid.'.home'})
1328: }
1329: return 'ok';
1330: }
1331:
1332: # ----------------------------------------------------- Devalidate Spreadsheets
1333:
1334: sub devalidate {
1335: my ($symb,$uname,$udom)=@_;
1336: my $cid=$ENV{'request.course.id'};
1337: if ($cid) {
1338: # delete the stored spreadsheets for
1339: # - the student level sheet of this user in course's homespace
1340: # - the assessment level sheet for this resource
1341: # for this user in user's homespace
1342: my $key=$uname.':'.$udom.':';
1343: my $status=
1344: &del('nohist_calculatedsheets',
1345: [$key.'studentcalc'],
1346: $ENV{'course.'.$cid.'.domain'},
1347: $ENV{'course.'.$cid.'.num'})
1348: .' '.
1349: &del('nohist_calculatedsheets_'.$cid,
1350: [$key.'assesscalc:'.$symb]);
1351: unless ($status eq 'ok ok') {
1352: &logthis('Could not devalidate spreadsheet '.
1353: $uname.' at '.$udom.' for '.
1354: $symb.': '.$status);
1355: }
1356: }
1357: }
1358:
1359: sub get_scalar {
1360: my ($string,$end) = @_;
1361: my $value;
1362: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1363: $value = $1;
1364: } elsif ($$string =~ s/^([^&]*?)&//) {
1365: $value = $1;
1366: }
1367: return &unescape($value);
1368: }
1369:
1370: sub array2str {
1371: my (@array) = @_;
1372: my $result=&arrayref2str(\@array);
1373: $result=~s/^__ARRAY_REF__//;
1374: $result=~s/__END_ARRAY_REF__$//;
1375: return $result;
1376: }
1377:
1378: sub arrayref2str {
1379: my ($arrayref) = @_;
1380: my $result='__ARRAY_REF__';
1381: foreach my $elem (@$arrayref) {
1382: if(ref($elem) eq 'ARRAY') {
1383: $result.=&arrayref2str($elem).'&';
1384: } elsif(ref($elem) eq 'HASH') {
1385: $result.=&hashref2str($elem).'&';
1386: } elsif(ref($elem)) {
1387: #print("Got a ref of ".(ref($elem))." skipping.");
1388: } else {
1389: $result.=&escape($elem).'&';
1390: }
1391: }
1392: $result=~s/\&$//;
1393: $result .= '__END_ARRAY_REF__';
1394: return $result;
1395: }
1396:
1397: sub hash2str {
1398: my (%hash) = @_;
1399: my $result=&hashref2str(\%hash);
1400: $result=~s/^__HASH_REF__//;
1401: $result=~s/__END_HASH_REF__$//;
1402: return $result;
1403: }
1404:
1405: sub hashref2str {
1406: my ($hashref)=@_;
1407: my $result='__HASH_REF__';
1408: foreach (keys(%$hashref)) {
1409: if (ref($_) eq 'ARRAY') {
1410: $result.=&arrayref2str($_).'=';
1411: } elsif (ref($_) eq 'HASH') {
1412: $result.=&hashref2str($_).'=';
1413: } elsif (ref($_)) {
1414: $result.='=';
1415: #print("Got a ref of ".(ref($_))." skipping.");
1416: } else {
1417: if ($_) {$result.=&escape($_).'=';} else { last; }
1418: }
1419:
1420: if(ref($hashref->{$_}) eq 'ARRAY') {
1421: $result.=&arrayref2str($hashref->{$_}).'&';
1422: } elsif(ref($hashref->{$_}) eq 'HASH') {
1423: $result.=&hashref2str($hashref->{$_}).'&';
1424: } elsif(ref($hashref->{$_})) {
1425: $result.='&';
1426: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1427: } else {
1428: $result.=&escape($hashref->{$_}).'&';
1429: }
1430: }
1431: $result=~s/\&$//;
1432: $result .= '__END_HASH_REF__';
1433: return $result;
1434: }
1435:
1436: sub str2hash {
1437: my ($string)=@_;
1438: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1439: return %$hash;
1440: }
1441:
1442: sub str2hashref {
1443: my ($string) = @_;
1444:
1445: my %hash;
1446:
1447: if($string !~ /^__HASH_REF__/) {
1448: if (! ($string eq '' || !defined($string))) {
1449: $hash{'error'}='Not hash reference';
1450: }
1451: return (\%hash, $string);
1452: }
1453:
1454: $string =~ s/^__HASH_REF__//;
1455:
1456: while($string !~ /^__END_HASH_REF__/) {
1457: #key
1458: my $key='';
1459: if($string =~ /^__HASH_REF__/) {
1460: ($key, $string)=&str2hashref($string);
1461: if(defined($key->{'error'})) {
1462: $hash{'error'}='Bad data';
1463: return (\%hash, $string);
1464: }
1465: } elsif($string =~ /^__ARRAY_REF__/) {
1466: ($key, $string)=&str2arrayref($string);
1467: if($key->[0] eq 'Array reference error') {
1468: $hash{'error'}='Bad data';
1469: return (\%hash, $string);
1470: }
1471: } else {
1472: $string =~ s/^(.*?)=//;
1473: $key=&unescape($1);
1474: }
1475: $string =~ s/^=//;
1476:
1477: #value
1478: my $value='';
1479: if($string =~ /^__HASH_REF__/) {
1480: ($value, $string)=&str2hashref($string);
1481: if(defined($value->{'error'})) {
1482: $hash{'error'}='Bad data';
1483: return (\%hash, $string);
1484: }
1485: } elsif($string =~ /^__ARRAY_REF__/) {
1486: ($value, $string)=&str2arrayref($string);
1487: if($value->[0] eq 'Array reference error') {
1488: $hash{'error'}='Bad data';
1489: return (\%hash, $string);
1490: }
1491: } else {
1492: $value=&get_scalar(\$string,'__END_HASH_REF__');
1493: }
1494: $string =~ s/^&//;
1495:
1496: $hash{$key}=$value;
1497: }
1498:
1499: $string =~ s/^__END_HASH_REF__//;
1500:
1501: return (\%hash, $string);
1502: }
1503:
1504: sub str2array {
1505: my ($string)=@_;
1506: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1507: return @$array;
1508: }
1509:
1510: sub str2arrayref {
1511: my ($string) = @_;
1512: my @array;
1513:
1514: if($string !~ /^__ARRAY_REF__/) {
1515: if (! ($string eq '' || !defined($string))) {
1516: $array[0]='Array reference error';
1517: }
1518: return (\@array, $string);
1519: }
1520:
1521: $string =~ s/^__ARRAY_REF__//;
1522:
1523: while($string !~ /^__END_ARRAY_REF__/) {
1524: my $value='';
1525: if($string =~ /^__HASH_REF__/) {
1526: ($value, $string)=&str2hashref($string);
1527: if(defined($value->{'error'})) {
1528: $array[0] ='Array reference error';
1529: return (\@array, $string);
1530: }
1531: } elsif($string =~ /^__ARRAY_REF__/) {
1532: ($value, $string)=&str2arrayref($string);
1533: if($value->[0] eq 'Array reference error') {
1534: $array[0] ='Array reference error';
1535: return (\@array, $string);
1536: }
1537: } else {
1538: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1539: }
1540: $string =~ s/^&//;
1541:
1542: push(@array, $value);
1543: }
1544:
1545: $string =~ s/^__END_ARRAY_REF__//;
1546:
1547: return (\@array, $string);
1548: }
1549:
1550: # -------------------------------------------------------------------Temp Store
1551:
1552: sub tmpreset {
1553: my ($symb,$namespace,$domain,$stuname) = @_;
1554: if (!$symb) {
1555: $symb=&symbread();
1556: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1557: }
1558: $symb=escape($symb);
1559:
1560: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1561: $namespace=~s/\//\_/g;
1562: $namespace=~s/\W//g;
1563:
1564: #FIXME needs to do something for /pub resources
1565: if (!$domain) { $domain=$ENV{'user.domain'}; }
1566: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1567: my $path=$perlvar{'lonDaemons'}.'/tmp';
1568: my %hash;
1569: if (tie(%hash,'GDBM_File',
1570: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1571: &GDBM_WRCREAT(),0640)) {
1572: foreach my $key (keys %hash) {
1573: if ($key=~ /:$symb/) {
1574: delete($hash{$key});
1575: }
1576: }
1577: }
1578: }
1579:
1580: sub tmpstore {
1581: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1582:
1583: if (!$symb) {
1584: $symb=&symbread();
1585: if (!$symb) { $symb= $ENV{'request.url'}; }
1586: }
1587: $symb=escape($symb);
1588:
1589: if (!$namespace) {
1590: # I don't think we would ever want to store this for a course.
1591: # it seems this will only be used if we don't have a course.
1592: #$namespace=$ENV{'request.course.id'};
1593: #if (!$namespace) {
1594: $namespace=$ENV{'request.state'};
1595: #}
1596: }
1597: $namespace=~s/\//\_/g;
1598: $namespace=~s/\W//g;
1599: #FIXME needs to do something for /pub resources
1600: if (!$domain) { $domain=$ENV{'user.domain'}; }
1601: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1602: my $now=time;
1603: my %hash;
1604: my $path=$perlvar{'lonDaemons'}.'/tmp';
1605: if (tie(%hash,'GDBM_File',
1606: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1607: &GDBM_WRCREAT(),0640)) {
1608: $hash{"version:$symb"}++;
1609: my $version=$hash{"version:$symb"};
1610: my $allkeys='';
1611: foreach my $key (keys(%$storehash)) {
1612: $allkeys.=$key.':';
1613: $hash{"$version:$symb:$key"}=$$storehash{$key};
1614: }
1615: $hash{"$version:$symb:timestamp"}=$now;
1616: $allkeys.='timestamp';
1617: $hash{"$version:keys:$symb"}=$allkeys;
1618: if (untie(%hash)) {
1619: return 'ok';
1620: } else {
1621: return "error:$!";
1622: }
1623: } else {
1624: return "error:$!";
1625: }
1626: }
1627:
1628: # -----------------------------------------------------------------Temp Restore
1629:
1630: sub tmprestore {
1631: my ($symb,$namespace,$domain,$stuname) = @_;
1632:
1633: if (!$symb) {
1634: $symb=&symbread();
1635: if (!$symb) { $symb= $ENV{'request.url'}; }
1636: }
1637: $symb=escape($symb);
1638:
1639: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1640: #FIXME needs to do something for /pub resources
1641: if (!$domain) { $domain=$ENV{'user.domain'}; }
1642: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1643:
1644: my %returnhash;
1645: $namespace=~s/\//\_/g;
1646: $namespace=~s/\W//g;
1647: my %hash;
1648: my $path=$perlvar{'lonDaemons'}.'/tmp';
1649: if (tie(%hash,'GDBM_File',
1650: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1651: &GDBM_READER(),0640)) {
1652: my $version=$hash{"version:$symb"};
1653: $returnhash{'version'}=$version;
1654: my $scope;
1655: for ($scope=1;$scope<=$version;$scope++) {
1656: my $vkeys=$hash{"$scope:keys:$symb"};
1657: my @keys=split(/:/,$vkeys);
1658: my $key;
1659: $returnhash{"$scope:keys"}=$vkeys;
1660: foreach $key (@keys) {
1661: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1662: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1663: }
1664: }
1665: if (!(untie(%hash))) {
1666: return "error:$!";
1667: }
1668: } else {
1669: return "error:$!";
1670: }
1671: return %returnhash;
1672: }
1673:
1674: # ----------------------------------------------------------------------- Store
1675:
1676: sub store {
1677: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1678: my $home='';
1679:
1680: if ($stuname) { $home=&homeserver($stuname,$domain); }
1681:
1682: $symb=&symbclean($symb);
1683: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1684:
1685: if (!$domain) { $domain=$ENV{'user.domain'}; }
1686: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1687:
1688: &devalidate($symb,$stuname,$domain);
1689:
1690: $symb=escape($symb);
1691: if (!$namespace) {
1692: unless ($namespace=$ENV{'request.course.id'}) {
1693: return '';
1694: }
1695: }
1696: if (!$home) { $home=$ENV{'user.home'}; }
1697: my $namevalue='';
1698: foreach (keys %$storehash) {
1699: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1700: }
1701: $namevalue=~s/\&$//;
1702: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1703: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1704: }
1705:
1706: # -------------------------------------------------------------- Critical Store
1707:
1708: sub cstore {
1709: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1710: my $home='';
1711:
1712: if ($stuname) { $home=&homeserver($stuname,$domain); }
1713:
1714: $symb=&symbclean($symb);
1715: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1716:
1717: if (!$domain) { $domain=$ENV{'user.domain'}; }
1718: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1719:
1720: &devalidate($symb,$stuname,$domain);
1721:
1722: $symb=escape($symb);
1723: if (!$namespace) {
1724: unless ($namespace=$ENV{'request.course.id'}) {
1725: return '';
1726: }
1727: }
1728: if (!$home) { $home=$ENV{'user.home'}; }
1729:
1730: my $namevalue='';
1731: foreach (keys %$storehash) {
1732: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1733: }
1734: $namevalue=~s/\&$//;
1735: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1736: return critical
1737: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1738: }
1739:
1740: # --------------------------------------------------------------------- Restore
1741:
1742: sub restore {
1743: my ($symb,$namespace,$domain,$stuname) = @_;
1744: my $home='';
1745:
1746: if ($stuname) { $home=&homeserver($stuname,$domain); }
1747:
1748: if (!$symb) {
1749: unless ($symb=escape(&symbread())) { return ''; }
1750: } else {
1751: $symb=&escape(&symbclean($symb));
1752: }
1753: if (!$namespace) {
1754: unless ($namespace=$ENV{'request.course.id'}) {
1755: return '';
1756: }
1757: }
1758: if (!$domain) { $domain=$ENV{'user.domain'}; }
1759: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1760: if (!$home) { $home=$ENV{'user.home'}; }
1761: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1762:
1763: my %returnhash=();
1764: foreach (split(/\&/,$answer)) {
1765: my ($name,$value)=split(/\=/,$_);
1766: $returnhash{&unescape($name)}=&unescape($value);
1767: }
1768: my $version;
1769: for ($version=1;$version<=$returnhash{'version'};$version++) {
1770: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1771: $returnhash{$_}=$returnhash{$version.':'.$_};
1772: }
1773: }
1774: return %returnhash;
1775: }
1776:
1777: # ---------------------------------------------------------- Course Description
1778:
1779: sub coursedescription {
1780: my $courseid=shift;
1781: $courseid=~s/^\///;
1782: $courseid=~s/\_/\//g;
1783: my ($cdomain,$cnum)=split(/\//,$courseid);
1784: my $chome=&homeserver($cnum,$cdomain);
1785: my $normalid=$cdomain.'_'.$cnum;
1786: # need to always cache even if we get errors otherwise we keep
1787: # trying and trying and trying to get the course description.
1788: my %envhash=();
1789: my %returnhash=();
1790: $envhash{'course.'.$normalid.'.last_cache'}=time;
1791: if ($chome ne 'no_host') {
1792: %returnhash=&dump('environment',$cdomain,$cnum);
1793: if (!exists($returnhash{'con_lost'})) {
1794: $returnhash{'home'}= $chome;
1795: $returnhash{'domain'} = $cdomain;
1796: $returnhash{'num'} = $cnum;
1797: while (my ($name,$value) = each %returnhash) {
1798: $envhash{'course.'.$normalid.'.'.$name}=$value;
1799: }
1800: $returnhash{'url'}=&clutter($returnhash{'url'});
1801: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1802: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1803: $envhash{'course.'.$normalid.'.home'}=$chome;
1804: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1805: $envhash{'course.'.$normalid.'.num'}=$cnum;
1806: }
1807: }
1808: &appenv(%envhash);
1809: return %returnhash;
1810: }
1811:
1812: # -------------------------------------------------------- Get user privileges
1813:
1814: sub rolesinit {
1815: my ($domain,$username,$authhost)=@_;
1816: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1817: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1818: my %allroles=();
1819: my %thesepriv=();
1820: my $now=time;
1821: my $userroles="user.login.time=$now\n";
1822: my $thesestr;
1823:
1824: if ($rolesdump ne '') {
1825: foreach (split(/&/,$rolesdump)) {
1826: if ($_!~/^rolesdef\&/) {
1827: my ($area,$role)=split(/=/,$_);
1828: $area=~s/\_\w\w$//;
1829: my ($trole,$tend,$tstart)=split(/_/,$role);
1830: $userroles.='user.role.'.$trole.'.'.$area.'='.
1831: $tstart.'.'.$tend."\n";
1832: # log the associated role with the area
1833: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
1834: if ($tend!=0) {
1835: if ($tend<$now) {
1836: $trole='';
1837: }
1838: }
1839: if ($tstart!=0) {
1840: if ($tstart>$now) {
1841: $trole='';
1842: }
1843: }
1844: if (($area ne '') && ($trole ne '')) {
1845: my $spec=$trole.'.'.$area;
1846: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1847: if ($trole =~ /^cr\//) {
1848: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1849: my $homsvr=homeserver($rauthor,$rdomain);
1850: if ($hostname{$homsvr} ne '') {
1851: my $roledef=
1852: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1853: $homsvr);
1854: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1855: my ($syspriv,$dompriv,$coursepriv)=
1856: split(/\_/,unescape($roledef));
1857: if (defined($syspriv)) {
1858: $allroles{'cm./'}.=':'.$syspriv;
1859: $allroles{$spec.'./'}.=':'.$syspriv;
1860: }
1861: if ($tdomain ne '') {
1862: if (defined($dompriv)) {
1863: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1864: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1865: }
1866: if ($trest ne '') {
1867: if (defined($coursepriv)) {
1868: $allroles{'cm.'.$area}.=':'.$coursepriv;
1869: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1870: }
1871: }
1872: }
1873: }
1874: }
1875: } else {
1876: if (defined($pr{$trole.':s'})) {
1877: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1878: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1879: }
1880: if ($tdomain ne '') {
1881: if (defined($pr{$trole.':d'})) {
1882: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1883: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1884: }
1885: if ($trest ne '') {
1886: if (defined($pr{$trole.':c'})) {
1887: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1888: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1889: }
1890: }
1891: }
1892: }
1893: }
1894: }
1895: }
1896: my $adv=0;
1897: my $author=0;
1898: foreach (keys %allroles) {
1899: %thesepriv=();
1900: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1901: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1902: foreach (split(/:/,$allroles{$_})) {
1903: if ($_ ne '') {
1904: my ($privilege,$restrictions)=split(/&/,$_);
1905: if ($restrictions eq '') {
1906: $thesepriv{$privilege}='F';
1907: } else {
1908: if ($thesepriv{$privilege} ne 'F') {
1909: $thesepriv{$privilege}.=$restrictions;
1910: }
1911: }
1912: }
1913: }
1914: $thesestr='';
1915: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1916: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1917: }
1918: $userroles.='user.adv='.$adv."\n".
1919: 'user.author='.$author."\n";
1920: $ENV{'user.adv'}=$adv;
1921: }
1922: return $userroles;
1923: }
1924:
1925: # --------------------------------------------------------------- get interface
1926:
1927: sub get {
1928: my ($namespace,$storearr,$udomain,$uname)=@_;
1929: my $items='';
1930: foreach (@$storearr) {
1931: $items.=escape($_).'&';
1932: }
1933: $items=~s/\&$//;
1934: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1935: if (!$uname) { $uname=$ENV{'user.name'}; }
1936: my $uhome=&homeserver($uname,$udomain);
1937:
1938: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1939: my @pairs=split(/\&/,$rep);
1940: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1941: return @pairs;
1942: }
1943: my %returnhash=();
1944: my $i=0;
1945: foreach (@$storearr) {
1946: $returnhash{$_}=unescape($pairs[$i]);
1947: $i++;
1948: }
1949: return %returnhash;
1950: }
1951:
1952: # --------------------------------------------------------------- del interface
1953:
1954: sub del {
1955: my ($namespace,$storearr,$udomain,$uname)=@_;
1956: my $items='';
1957: foreach (@$storearr) {
1958: $items.=escape($_).'&';
1959: }
1960: $items=~s/\&$//;
1961: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1962: if (!$uname) { $uname=$ENV{'user.name'}; }
1963: my $uhome=&homeserver($uname,$udomain);
1964:
1965: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1966: }
1967:
1968: # -------------------------------------------------------------- dump interface
1969:
1970: sub dump {
1971: my ($namespace,$udomain,$uname,$regexp)=@_;
1972: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1973: if (!$uname) { $uname=$ENV{'user.name'}; }
1974: my $uhome=&homeserver($uname,$udomain);
1975: if ($regexp) {
1976: $regexp=&escape($regexp);
1977: } else {
1978: $regexp='.';
1979: }
1980: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1981: my @pairs=split(/\&/,$rep);
1982: my %returnhash=();
1983: foreach (@pairs) {
1984: my ($key,$value)=split(/=/,$_);
1985: $returnhash{unescape($key)}=unescape($value);
1986: }
1987: return %returnhash;
1988: }
1989:
1990: # --------------------------------------------------------------- currentdump
1991: sub currentdump {
1992: my ($courseid,$sdom,$sname)=@_;
1993: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1994: $sdom = $ENV{'user.domain'} if (! defined($sdom));
1995: $sname = $ENV{'user.name'} if (! defined($sname));
1996: my $uhome = &homeserver($sname,$sdom);
1997: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
1998: return if ($rep =~ /^(error:|no_such_host)/);
1999: #
2000: my %returnhash=();
2001: #
2002: if ($rep eq "unknown_cmd") {
2003: # an old lond will not know currentdump
2004: # Do a dump and make it look like a currentdump
2005: my @tmp = &dump($courseid,$sdom,$sname,'.');
2006: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2007: my %hash = @tmp;
2008: @tmp=();
2009: # Code ripped from lond, essentially. The only difference
2010: # here is the unescaping done by lonnet::dump(). Conceivably
2011: # we might run in to problems with parameter names =~ /^v\./
2012: while (my ($key,$value) = each(%hash)) {
2013: my ($v,$symb,$param) = split(/:/,$key);
2014: next if ($v eq 'version' || $symb eq 'keys');
2015: next if (exists($returnhash{$symb}) &&
2016: exists($returnhash{$symb}->{$param}) &&
2017: $returnhash{$symb}->{'v.'.$param} > $v);
2018: $returnhash{$symb}->{$param}=$value;
2019: $returnhash{$symb}->{'v.'.$param}=$v;
2020: }
2021: #
2022: # Remove all of the keys in the hashes which keep track of
2023: # the version of the parameter.
2024: while (my ($symb,$param_hash) = each(%returnhash)) {
2025: # use a foreach because we are going to delete from the hash.
2026: foreach my $key (keys(%$param_hash)) {
2027: delete($param_hash->{$key}) if ($key =~ /^v\./);
2028: }
2029: }
2030: } else {
2031: my @pairs=split(/\&/,$rep);
2032: foreach (@pairs) {
2033: my ($key,$value)=split(/=/,$_);
2034: my ($symb,$param) = split(/:/,$key);
2035: $returnhash{&unescape($symb)}->{&unescape($param)} =
2036: &unescape($value);
2037: }
2038: }
2039: return %returnhash;
2040: }
2041:
2042: # --------------------------------------------------------------- put interface
2043:
2044: sub put {
2045: my ($namespace,$storehash,$udomain,$uname)=@_;
2046: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2047: if (!$uname) { $uname=$ENV{'user.name'}; }
2048: my $uhome=&homeserver($uname,$udomain);
2049: my $items='';
2050: foreach (keys %$storehash) {
2051: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
2052: }
2053: $items=~s/\&$//;
2054: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2055: }
2056:
2057: # ------------------------------------------------------ critical put interface
2058:
2059: sub cput {
2060: my ($namespace,$storehash,$udomain,$uname)=@_;
2061: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2062: if (!$uname) { $uname=$ENV{'user.name'}; }
2063: my $uhome=&homeserver($uname,$udomain);
2064: my $items='';
2065: foreach (keys %$storehash) {
2066: $items.=escape($_).'='.escape($$storehash{$_}).'&';
2067: }
2068: $items=~s/\&$//;
2069: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2070: }
2071:
2072: # -------------------------------------------------------------- eget interface
2073:
2074: sub eget {
2075: my ($namespace,$storearr,$udomain,$uname)=@_;
2076: my $items='';
2077: foreach (@$storearr) {
2078: $items.=escape($_).'&';
2079: }
2080: $items=~s/\&$//;
2081: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2082: if (!$uname) { $uname=$ENV{'user.name'}; }
2083: my $uhome=&homeserver($uname,$udomain);
2084: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2085: my @pairs=split(/\&/,$rep);
2086: my %returnhash=();
2087: my $i=0;
2088: foreach (@$storearr) {
2089: $returnhash{$_}=unescape($pairs[$i]);
2090: $i++;
2091: }
2092: return %returnhash;
2093: }
2094:
2095: # ---------------------------------------------- Custom access rule evaluation
2096:
2097: sub customaccess {
2098: my ($priv,$uri)=@_;
2099: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2100: $urealm=~s/^\W//;
2101: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2102: my $access=0;
2103: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2104: my ($effect,$realm,$role)=split(/\:/,$_);
2105: if ($role) {
2106: if ($role ne $urole) { next; }
2107: }
2108: foreach (split(/\s*\,\s*/,$realm)) {
2109: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2110: if ($tdom) {
2111: if ($tdom ne $udom) { next; }
2112: }
2113: if ($tcrs) {
2114: if ($tcrs ne $ucrs) { next; }
2115: }
2116: if ($tsec) {
2117: if ($tsec ne $usec) { next; }
2118: }
2119: $access=($effect eq 'allow');
2120: last;
2121: }
2122: }
2123: return $access;
2124: }
2125:
2126: # ------------------------------------------------- Check for a user privilege
2127:
2128: sub allowed {
2129: my ($priv,$uri)=@_;
2130:
2131: my $orguri=$uri;
2132: $uri=&declutter($uri);
2133:
2134: # Free bre access to adm and meta resources
2135:
2136: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2137: return 'F';
2138: }
2139:
2140: # Free bre to public access
2141:
2142: if ($priv eq 'bre') {
2143: my $copyright=&metadata($uri,'copyright');
2144: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2145: return 'F';
2146: }
2147: if ($copyright eq 'priv') {
2148: $uri=~/([^\/]+)\/([^\/]+)\//;
2149: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2150: return '';
2151: }
2152: }
2153: if ($copyright eq 'domain') {
2154: $uri=~/([^\/]+)\/([^\/]+)\//;
2155: unless (($ENV{'user.domain'} eq $1) ||
2156: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2157: return '';
2158: }
2159: }
2160: if ($ENV{'request.role'}=~ /li\.\//) {
2161: # Library role, so allow browsing of resources in this domain.
2162: return 'F';
2163: }
2164: if ($copyright eq 'custom') {
2165: unless (&customaccess($priv,$uri)) { return ''; }
2166: }
2167: }
2168: # Domain coordinator is trying to create a course
2169: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2170: # uri is the requested domain in this case.
2171: # comparison to 'request.role.domain' shows if the user has selected
2172: # a role of dc for the domain in question.
2173: return 'F' if ($uri eq $ENV{'request.role.domain'});
2174: }
2175:
2176: my $thisallowed='';
2177: my $statecond=0;
2178: my $courseprivid='';
2179:
2180: # Course
2181:
2182: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2183: $thisallowed.=$1;
2184: }
2185:
2186: # Domain
2187:
2188: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2189: =~/$priv\&([^\:]*)/) {
2190: $thisallowed.=$1;
2191: }
2192:
2193: # Course: uri itself is a course
2194: my $courseuri=$uri;
2195: $courseuri=~s/\_(\d)/\/$1/;
2196: $courseuri=~s/^([^\/])/\/$1/;
2197:
2198: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2199: =~/$priv\&([^\:]*)/) {
2200: $thisallowed.=$1;
2201: }
2202:
2203: # URI is an uploaded document for this course
2204:
2205: if (($priv eq 'bre') &&
2206: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2207: return 'F';
2208: }
2209: # Full access at system, domain or course-wide level? Exit.
2210:
2211: if ($thisallowed=~/F/) {
2212: return 'F';
2213: }
2214:
2215: # If this is generating or modifying users, exit with special codes
2216:
2217: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
2218: return $thisallowed;
2219: }
2220: #
2221: # Gathered so far: system, domain and course wide privileges
2222: #
2223: # Course: See if uri or referer is an individual resource that is part of
2224: # the course
2225:
2226: if ($ENV{'request.course.id'}) {
2227:
2228: $courseprivid=$ENV{'request.course.id'};
2229: if ($ENV{'request.course.sec'}) {
2230: $courseprivid.='/'.$ENV{'request.course.sec'};
2231: }
2232: $courseprivid=~s/\_/\//;
2233: my $checkreferer=1;
2234: my ($match,$cond)=&is_on_map($uri);
2235: if ($match) {
2236: $statecond=$cond;
2237: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2238: =~/$priv\&([^\:]*)/) {
2239: $thisallowed.=$1;
2240: $checkreferer=0;
2241: }
2242: }
2243:
2244: if ($checkreferer) {
2245: my $refuri=$ENV{'httpref.'.$orguri};
2246: unless ($refuri) {
2247: foreach (keys %ENV) {
2248: if ($_=~/^httpref\..*\*/) {
2249: my $pattern=$_;
2250: $pattern=~s/^httpref\.\/res\///;
2251: $pattern=~s/\*/\[\^\/\]\+/g;
2252: $pattern=~s/\//\\\//g;
2253: if ($orguri=~/$pattern/) {
2254: $refuri=$ENV{$_};
2255: }
2256: }
2257: }
2258: }
2259:
2260: if ($refuri) {
2261: $refuri=&declutter($refuri);
2262: my ($match,$cond)=&is_on_map($refuri);
2263: if ($match) {
2264: my $refstatecond=$cond;
2265: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2266: =~/$priv\&([^\:]*)/) {
2267: $thisallowed.=$1;
2268: $uri=$refuri;
2269: $statecond=$refstatecond;
2270: }
2271: }
2272: }
2273: }
2274: }
2275:
2276: #
2277: # Gathered now: all privileges that could apply, and condition number
2278: #
2279: #
2280: # Full or no access?
2281: #
2282:
2283: if ($thisallowed=~/F/) {
2284: return 'F';
2285: }
2286:
2287: unless ($thisallowed) {
2288: return '';
2289: }
2290:
2291: # Restrictions exist, deal with them
2292: #
2293: # C:according to course preferences
2294: # R:according to resource settings
2295: # L:unless locked
2296: # X:according to user session state
2297: #
2298:
2299: # Possibly locked functionality, check all courses
2300: # Locks might take effect only after 10 minutes cache expiration for other
2301: # courses, and 2 minutes for current course
2302:
2303: my $envkey;
2304: if ($thisallowed=~/L/) {
2305: foreach $envkey (keys %ENV) {
2306: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2307: my $courseid=$2;
2308: my $roleid=$1.'.'.$2;
2309: $courseid=~s/^\///;
2310: my $expiretime=600;
2311: if ($ENV{'request.role'} eq $roleid) {
2312: $expiretime=120;
2313: }
2314: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2315: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2316: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2317: &coursedescription($courseid);
2318: }
2319: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2320: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2321: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2322: &log($ENV{'user.domain'},$ENV{'user.name'},
2323: $ENV{'user.home'},
2324: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2325: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2326: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2327: return '';
2328: }
2329: }
2330: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2331: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2332: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2333: &log($ENV{'user.domain'},$ENV{'user.name'},
2334: $ENV{'user.home'},
2335: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2336: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2337: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2338: return '';
2339: }
2340: }
2341: }
2342: }
2343: }
2344:
2345: #
2346: # Rest of the restrictions depend on selected course
2347: #
2348:
2349: unless ($ENV{'request.course.id'}) {
2350: return '1';
2351: }
2352:
2353: #
2354: # Now user is definitely in a course
2355: #
2356:
2357:
2358: # Course preferences
2359:
2360: if ($thisallowed=~/C/) {
2361: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2362: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2363: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2364: =~/$rolecode/) {
2365: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2366: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2367: $ENV{'request.course.id'});
2368: return '';
2369: }
2370:
2371: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2372: =~/$unamedom/) {
2373: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2374: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2375: $ENV{'request.course.id'});
2376: return '';
2377: }
2378: }
2379:
2380: # Resource preferences
2381:
2382: if ($thisallowed=~/R/) {
2383: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2384: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2385: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2386: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2387: return '';
2388: }
2389: }
2390:
2391: # Restricted by state or randomout?
2392:
2393: if ($thisallowed=~/X/) {
2394: if ($ENV{'acc.randomout'}) {
2395: my $symb=&symbread($uri,1);
2396: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2397: return '';
2398: }
2399: }
2400: if (&condval($statecond)) {
2401: return '2';
2402: } else {
2403: return '';
2404: }
2405: }
2406:
2407: return 'F';
2408: }
2409:
2410: # --------------------------------------------------- Is a resource on the map?
2411:
2412: sub is_on_map {
2413: my $uri=&declutter(shift);
2414: my @uriparts=split(/\//,$uri);
2415: my $filename=$uriparts[$#uriparts];
2416: my $pathname=$uri;
2417: $pathname=~s|/\Q$filename\E$||;
2418: $pathname=~s/^adm\/wrapper\///;
2419: #Trying to find the conditional for the file
2420: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2421: /\&\Q$filename\E\:([\d\|]+)\&/);
2422: if ($match) {
2423: return (1,$1);
2424: } else {
2425: return (0,0);
2426: }
2427: }
2428:
2429: # ----------------------------------------------------------------- Define Role
2430:
2431: sub definerole {
2432: if (allowed('mcr','/')) {
2433: my ($rolename,$sysrole,$domrole,$courole)=@_;
2434: foreach (split('/',$sysrole)) {
2435: my ($crole,$cqual)=split(/\&/,$_);
2436: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2437: if ($pr{'cr:s'}=~/$crole\&/) {
2438: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2439: return "refused:s:$crole&$cqual";
2440: }
2441: }
2442: }
2443: foreach (split('/',$domrole)) {
2444: my ($crole,$cqual)=split(/\&/,$_);
2445: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2446: if ($pr{'cr:d'}=~/$crole\&/) {
2447: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2448: return "refused:d:$crole&$cqual";
2449: }
2450: }
2451: }
2452: foreach (split('/',$courole)) {
2453: my ($crole,$cqual)=split(/\&/,$_);
2454: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2455: if ($pr{'cr:c'}=~/$crole\&/) {
2456: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2457: return "refused:c:$crole&$cqual";
2458: }
2459: }
2460: }
2461: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2462: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2463: "rolesdef_$rolename=".
2464: escape($sysrole.'_'.$domrole.'_'.$courole);
2465: return reply($command,$ENV{'user.home'});
2466: } else {
2467: return 'refused';
2468: }
2469: }
2470:
2471: # ---------------- Make a metadata query against the network of library servers
2472:
2473: sub metadata_query {
2474: my ($query,$custom,$customshow,$server_array)=@_;
2475: my %rhash;
2476: my @server_list = (defined($server_array) ? @$server_array
2477: : keys(%libserv) );
2478: for my $server (@server_list) {
2479: unless ($custom or $customshow) {
2480: my $reply=&reply("querysend:".&escape($query),$server);
2481: $rhash{$server}=$reply;
2482: }
2483: else {
2484: my $reply=&reply("querysend:".&escape($query).':'.
2485: &escape($custom).':'.&escape($customshow),
2486: $server);
2487: $rhash{$server}=$reply;
2488: }
2489: }
2490: return \%rhash;
2491: }
2492:
2493: # ----------------------------------------- Send log queries and wait for reply
2494:
2495: sub log_query {
2496: my ($uname,$udom,$query,%filters)=@_;
2497: my $uhome=&homeserver($uname,$udom);
2498: if ($uhome eq 'no_host') { return 'error: no_host'; }
2499: my $uhost=$hostname{$uhome};
2500: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2501: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2502: $uhome);
2503: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2504: return get_query_reply($queryid);
2505: }
2506:
2507: sub get_query_reply {
2508: my $queryid=shift;
2509: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2510: my $reply='';
2511: for (1..100) {
2512: sleep 2;
2513: if (-e $replyfile.'.end') {
2514: if (my $fh=Apache::File->new($replyfile)) {
2515: $reply.=<$fh>;
2516: $fh->close;
2517: } else { return 'error: reply_file_error'; }
2518: return &unescape($reply);
2519: }
2520: }
2521: return 'timeout:'.$queryid;
2522: }
2523:
2524: sub courselog_query {
2525: #
2526: # possible filters:
2527: # url: url or symb
2528: # username
2529: # domain
2530: # action: view, submit, grade
2531: # start: timestamp
2532: # end: timestamp
2533: #
2534: my (%filters)=@_;
2535: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2536: if ($filters{'url'}) {
2537: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2538: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2539: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2540: }
2541: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2542: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2543: return &log_query($cname,$cdom,'courselog',%filters);
2544: }
2545:
2546: sub userlog_query {
2547: my ($uname,$udom,%filters)=@_;
2548: return &log_query($uname,$udom,'userlog',%filters);
2549: }
2550:
2551: # ------------------------------------------------------------------ Plain Text
2552:
2553: sub plaintext {
2554: my $short=shift;
2555: return $prp{$short};
2556: }
2557:
2558: # ----------------------------------------------------------------- Assign Role
2559:
2560: sub assignrole {
2561: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
2562: my $mrole;
2563: if ($role =~ /^cr\//) {
2564: unless (&allowed('ccr',$url)) {
2565: &logthis('Refused custom assignrole: '.
2566: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2567: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2568: return 'refused';
2569: }
2570: $mrole='cr';
2571: } else {
2572: my $cwosec=$url;
2573: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2574: unless (&allowed('c'.$role,$cwosec)) {
2575: &logthis('Refused assignrole: '.
2576: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2577: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2578: return 'refused';
2579: }
2580: $mrole=$role;
2581: }
2582: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2583: "$udom:$uname:$url".'_'."$mrole=$role";
2584: if ($end) { $command.='_'.$end; }
2585: if ($start) {
2586: if ($end) {
2587: $command.='_'.$start;
2588: } else {
2589: $command.='_0_'.$start;
2590: }
2591: }
2592: # actually delete
2593: if ($deleteflag) {
2594: if (&allowed('dro',$udom)) {
2595: # modify command to delete the role
2596: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
2597: "$udom:$uname:$url".'_'."$mrole";
2598: # set start and finish to negative values for userrolelog
2599: $start=-1;
2600: $end=-1;
2601: }
2602: }
2603: # send command
2604: my $answer=&reply($command,&homeserver($uname,$udom));
2605: # log new user role if status is ok
2606: if ($answer eq 'ok') {
2607: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
2608: }
2609: return $answer;
2610: }
2611:
2612: # -------------------------------------------------- Modify user authentication
2613: # Overrides without validation
2614:
2615: sub modifyuserauth {
2616: my ($udom,$uname,$umode,$upass)=@_;
2617: my $uhome=&homeserver($uname,$udom);
2618: unless (&allowed('mau',$udom)) { return 'refused'; }
2619: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2620: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2621: ' in domain '.$ENV{'request.role.domain'});
2622: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2623: &escape($upass),$uhome);
2624: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2625: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2626: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2627: &log($udom,,$uname,$uhome,
2628: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2629: $ENV{'user.name'}.', '.$umode.
2630: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2631: unless ($reply eq 'ok') {
2632: &logthis('Authentication mode error: '.$reply);
2633: return 'error: '.$reply;
2634: }
2635: return 'ok';
2636: }
2637:
2638: # --------------------------------------------------------------- Modify a user
2639:
2640: sub modifyuser {
2641: my ($udom, $uname, $uid,
2642: $umode, $upass, $first,
2643: $middle, $last, $gene,
2644: $forceid, $desiredhome)=@_;
2645: $udom=~s/\W//g;
2646: $uname=~s/\W//g;
2647: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2648: $umode.', '.$first.', '.$middle.', '.
2649: $last.', '.$gene.'(forceid: '.$forceid.')'.
2650: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2651: ' desiredhome not specified').
2652: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2653: ' in domain '.$ENV{'request.role.domain'});
2654: my $uhome=&homeserver($uname,$udom,'true');
2655: # ----------------------------------------------------------------- Create User
2656: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2657: my $unhome='';
2658: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2659: $unhome = $desiredhome;
2660: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2661: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2662: } else { # load balancing routine for determining $unhome
2663: my $tryserver;
2664: my $loadm=10000000;
2665: foreach $tryserver (keys %libserv) {
2666: if ($hostdom{$tryserver} eq $udom) {
2667: my $answer=reply('load',$tryserver);
2668: if (($answer=~/\d+/) && ($answer<$loadm)) {
2669: $loadm=$answer;
2670: $unhome=$tryserver;
2671: }
2672: }
2673: }
2674: }
2675: if (($unhome eq '') || ($unhome eq 'no_host')) {
2676: return 'error: unable to find a home server for '.$uname.
2677: ' in domain '.$udom;
2678: }
2679: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2680: &escape($upass),$unhome);
2681: unless ($reply eq 'ok') {
2682: return 'error: '.$reply;
2683: }
2684: $uhome=&homeserver($uname,$udom,'true');
2685: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2686: return 'error: verify home';
2687: }
2688: } # End of creation of new user
2689: # ---------------------------------------------------------------------- Add ID
2690: if ($uid) {
2691: $uid=~tr/A-Z/a-z/;
2692: my %uidhash=&idrget($udom,$uname);
2693: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2694: && (!$forceid)) {
2695: unless ($uid eq $uidhash{$uname}) {
2696: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2697: }
2698: } else {
2699: &idput($udom,($uname => $uid));
2700: }
2701: }
2702: # -------------------------------------------------------------- Add names, etc
2703: my @tmp=&get('environment',
2704: ['firstname','middlename','lastname','generation'],
2705: $udom,$uname);
2706: my %names;
2707: if ($tmp[0] =~ m/^error:.*/) {
2708: %names=();
2709: } else {
2710: %names = @tmp;
2711: }
2712: if ($first) { $names{'firstname'} = $first; }
2713: if ($middle) { $names{'middlename'} = $middle; }
2714: if ($last) { $names{'lastname'} = $last; }
2715: if ($gene) { $names{'generation'} = $gene; }
2716: my $reply = &put('environment', \%names, $udom,$uname);
2717: if ($reply ne 'ok') { return 'error: '.$reply; }
2718: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2719: $umode.', '.$first.', '.$middle.', '.
2720: $last.', '.$gene.' by '.
2721: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2722: return 'ok';
2723: }
2724:
2725: # -------------------------------------------------------------- Modify student
2726:
2727: sub modifystudent {
2728: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2729: $end,$start,$forceid,$desiredhome)=@_;
2730: my $cid='';
2731: unless ($cid=$ENV{'request.course.id'}) {
2732: return 'not_in_class';
2733: }
2734: # --------------------------------------------------------------- Make the user
2735: my $reply=&modifyuser
2736: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2737: $desiredhome);
2738: unless ($reply eq 'ok') { return $reply; }
2739: # This will cause &modify_student_enrollment to get the uid from the
2740: # students environment
2741: $uid = undef if (!$forceid);
2742: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2743: $last,$gene,$usec,$end,$start);
2744: return $reply;
2745: }
2746:
2747: sub modify_student_enrollment {
2748: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2749: # Get the course id from the environment
2750: my $cid='';
2751: unless ($cid=$ENV{'request.course.id'}) {
2752: return 'not_in_class';
2753: }
2754: # Make sure the user exists
2755: my $uhome=&homeserver($uname,$udom);
2756: if (($uhome eq '') || ($uhome eq 'no_host')) {
2757: return 'error: no such user';
2758: }
2759: #
2760: # Get student data if we were not given enough information
2761: if (!defined($first) || $first eq '' ||
2762: !defined($last) || $last eq '' ||
2763: !defined($uid) || $uid eq '' ||
2764: !defined($middle) || $middle eq '' ||
2765: !defined($gene) || $gene eq '') {
2766: # They did not supply us with enough data to enroll the student, so
2767: # we need to pick up more information.
2768: my %tmp = &get('environment',
2769: ['firstname','middlename','lastname', 'generation','id']
2770: ,$udom,$uname);
2771:
2772: foreach (keys(%tmp)) {
2773: &logthis("key $_ = ".$tmp{$_});
2774: }
2775: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2776: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2777: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
2778: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
2779: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2780: }
2781: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2782: $first,$middle);
2783: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2784: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2785: &escape($uname.':'.$udom).'='.
2786: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
2787: $ENV{'course.'.$cid.'.home'});
2788: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2789: return 'error: '.$reply;
2790: }
2791: # Add student role to user
2792: my $uurl='/'.$cid;
2793: $uurl=~s/\_/\//g;
2794: if ($usec) {
2795: $uurl.='/'.$usec;
2796: }
2797: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2798: }
2799:
2800: # ------------------------------------------------- Write to course preferences
2801:
2802: sub writecoursepref {
2803: my ($courseid,%prefs)=@_;
2804: $courseid=~s/^\///;
2805: $courseid=~s/\_/\//g;
2806: my ($cdomain,$cnum)=split(/\//,$courseid);
2807: my $chome=homeserver($cnum,$cdomain);
2808: if (($chome eq '') || ($chome eq 'no_host')) {
2809: return 'error: no such course';
2810: }
2811: my $cstring='';
2812: foreach (keys %prefs) {
2813: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2814: }
2815: $cstring=~s/\&$//;
2816: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2817: }
2818:
2819: # ---------------------------------------------------------- Make/modify course
2820:
2821: sub createcourse {
2822: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2823: $url=&declutter($url);
2824: my $cid='';
2825: unless (&allowed('ccc',$udom)) {
2826: return 'refused';
2827: }
2828: # ------------------------------------------------------------------- Create ID
2829: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2830: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2831: # ----------------------------------------------- Make sure that does not exist
2832: my $uhome=&homeserver($uname,$udom,'true');
2833: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2834: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2835: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2836: $uhome=&homeserver($uname,$udom,'true');
2837: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2838: return 'error: unable to generate unique course-ID';
2839: }
2840: }
2841: # ------------------------------------------------ Check supplied server name
2842: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2843: if (! exists($libserv{$course_server})) {
2844: return 'error:bad server name '.$course_server;
2845: }
2846: # ------------------------------------------------------------- Make the course
2847: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2848: $course_server);
2849: unless ($reply eq 'ok') { return 'error: '.$reply; }
2850: $uhome=&homeserver($uname,$udom,'true');
2851: if (($uhome eq '') || ($uhome eq 'no_host')) {
2852: return 'error: no such course';
2853: }
2854: # ----------------------------------------------------------------- Course made
2855: # log existance
2856: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),
2857: $uhome);
2858: &flushcourselogs();
2859: # set toplevel url
2860: my $topurl=$url;
2861: unless ($nonstandard) {
2862: # ------------------------------------------ For standard courses, make top url
2863: my $mapurl=&clutter($url);
2864: if ($mapurl eq '/res/') { $mapurl=''; }
2865: $ENV{'form.initmap'}=(<<ENDINITMAP);
2866: <map>
2867: <resource id="1" type="start"></resource>
2868: <resource id="2" src="$mapurl"></resource>
2869: <resource id="3" type="finish"></resource>
2870: <link index="1" from="1" to="2"></link>
2871: <link index="2" from="2" to="3"></link>
2872: </map>
2873: ENDINITMAP
2874: $topurl=&declutter(
2875: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2876: );
2877: }
2878: # ----------------------------------------------------------- Write preferences
2879: &writecoursepref($udom.'_'.$uname,
2880: ('description' => $description,
2881: 'url' => $topurl));
2882: return '/'.$udom.'/'.$uname;
2883: }
2884:
2885: # ---------------------------------------------------------- Assign Custom Role
2886:
2887: sub assigncustomrole {
2888: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
2889: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2890: $end,$start,$deleteflag);
2891: }
2892:
2893: # ----------------------------------------------------------------- Revoke Role
2894:
2895: sub revokerole {
2896: my ($udom,$uname,$url,$role,$deleteflag)=@_;
2897: my $now=time;
2898: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
2899: }
2900:
2901: # ---------------------------------------------------------- Revoke Custom Role
2902:
2903: sub revokecustomrole {
2904: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
2905: my $now=time;
2906: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
2907: $deleteflag);
2908: }
2909:
2910: # ------------------------------------------------------------ Directory lister
2911:
2912: sub dirlist {
2913: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2914:
2915: $uri=~s/^\///;
2916: $uri=~s/\/$//;
2917: my ($udom, $uname);
2918: (undef,$udom,$uname)=split(/\//,$uri);
2919: if(defined($userdomain)) {
2920: $udom = $userdomain;
2921: }
2922: if(defined($username)) {
2923: $uname = $username;
2924: }
2925:
2926: my $dirRoot = $perlvar{'lonDocRoot'};
2927: if(defined($alternateDirectoryRoot)) {
2928: $dirRoot = $alternateDirectoryRoot;
2929: $dirRoot =~ s/\/$//;
2930: }
2931:
2932: if($udom) {
2933: if($uname) {
2934: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2935: homeserver($uname,$udom));
2936: return split(/:/,$listing);
2937: } elsif(!defined($alternateDirectoryRoot)) {
2938: my $tryserver;
2939: my %allusers=();
2940: foreach $tryserver (keys %libserv) {
2941: if($hostdom{$tryserver} eq $udom) {
2942: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2943: $udom, $tryserver);
2944: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2945: && ($listing ne 'con_lost')) {
2946: foreach (split(/:/,$listing)) {
2947: my ($entry,@stat)=split(/&/,$_);
2948: $allusers{$entry}=1;
2949: }
2950: }
2951: }
2952: }
2953: my $alluserstr='';
2954: foreach (sort keys %allusers) {
2955: $alluserstr.=$_.'&user:';
2956: }
2957: $alluserstr=~s/:$//;
2958: return split(/:/,$alluserstr);
2959: } else {
2960: my @emptyResults = ();
2961: push(@emptyResults, 'missing user name');
2962: return split(':',@emptyResults);
2963: }
2964: } elsif(!defined($alternateDirectoryRoot)) {
2965: my $tryserver;
2966: my %alldom=();
2967: foreach $tryserver (keys %libserv) {
2968: $alldom{$hostdom{$tryserver}}=1;
2969: }
2970: my $alldomstr='';
2971: foreach (sort keys %alldom) {
2972: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2973: }
2974: $alldomstr=~s/:$//;
2975: return split(/:/,$alldomstr);
2976: } else {
2977: my @emptyResults = ();
2978: push(@emptyResults, 'missing domain');
2979: return split(':',@emptyResults);
2980: }
2981: }
2982:
2983: # --------------------------------------------- GetFileTimestamp
2984: # This function utilizes dirlist and returns the date stamp for
2985: # when it was last modified. It will also return an error of -1
2986: # if an error occurs
2987:
2988: sub GetFileTimestamp {
2989: my ($studentDomain,$studentName,$filename,$root)=@_;
2990: $studentDomain=~s/\W//g;
2991: $studentName=~s/\W//g;
2992: my $subdir=$studentName.'__';
2993: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
2994: my $proname="$studentDomain/$subdir/$studentName";
2995: $proname .= '/'.$filename;
2996: my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
2997: $root);
2998: my $fileStat = $dir[0];
2999: my @stats = split('&', $fileStat);
3000: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
3001: return $stats[9];
3002: } else {
3003: return -1;
3004: }
3005: }
3006:
3007: # -------------------------------------------------------- Value of a Condition
3008:
3009: sub directcondval {
3010: my $number=shift;
3011: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3012: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3013: } else {
3014: return 2;
3015: }
3016: }
3017:
3018: sub condval {
3019: my $condidx=shift;
3020: my $result=0;
3021: my $allpathcond='';
3022: foreach (split(/\|/,$condidx)) {
3023: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3024: $allpathcond.=
3025: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3026: }
3027: }
3028: $allpathcond=~s/\|$//;
3029: if ($ENV{'request.course.id'}) {
3030: if ($allpathcond) {
3031: my $operand='|';
3032: my @stack;
3033: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3034: if ($_ eq '(') {
3035: push @stack,($operand,$result)
3036: } elsif ($_ eq ')') {
3037: my $before=pop @stack;
3038: if (pop @stack eq '&') {
3039: $result=$result>$before?$before:$result;
3040: } else {
3041: $result=$result>$before?$result:$before;
3042: }
3043: } elsif (($_ eq '&') || ($_ eq '|')) {
3044: $operand=$_;
3045: } else {
3046: my $new=directcondval($_);
3047: if ($operand eq '&') {
3048: $result=$result>$new?$new:$result;
3049: } else {
3050: $result=$result>$new?$result:$new;
3051: }
3052: }
3053: }
3054: }
3055: }
3056: return $result;
3057: }
3058:
3059: # ---------------------------------------------------- Devalidate courseresdata
3060:
3061: sub devalidatecourseresdata {
3062: my ($coursenum,$coursedomain)=@_;
3063: my $hashid=$coursenum.':'.$coursedomain;
3064: delete $courseresdatacache{$hashid.'.time'};
3065: }
3066:
3067: # --------------------------------------------------- Course Resourcedata Query
3068:
3069: sub courseresdata {
3070: my ($coursenum,$coursedomain,@which)=@_;
3071: my $coursehom=&homeserver($coursenum,$coursedomain);
3072: my $hashid=$coursenum.':'.$coursedomain;
3073: my $dodump=0;
3074: if (!defined($courseresdatacache{$hashid.'.time'})) {
3075: $dodump=1;
3076: } else {
3077: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
3078: }
3079: if ($dodump) {
3080: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3081: my ($tmp) = keys(%dumpreply);
3082: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3083: $courseresdatacache{$hashid.'.time'}=time;
3084: $courseresdatacache{$hashid}=\%dumpreply;
3085: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3086: return $tmp;
3087: }
3088: }
3089: foreach my $item (@which) {
3090: if (defined($courseresdatacache{$hashid}->{$item})) {
3091: return $courseresdatacache{$hashid}->{$item};
3092: }
3093: }
3094: return undef;
3095: }
3096:
3097: # --------------------------------------------------------- Value of a Variable
3098:
3099: sub EXT {
3100: my ($varname,$symbparm,$udom,$uname,)=@_;
3101:
3102: unless ($varname) { return ''; }
3103: #get real user name/domain, courseid and symb
3104: my $courseid;
3105: my $publicuser;
3106: if (!($uname && $udom)) {
3107: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
3108: &Apache::lonxml::whichuser();
3109: if (!$symbparm) { $symbparm=$cursymb; }
3110: } else {
3111: $courseid=$ENV{'request.course.id'};
3112: }
3113: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3114: my $rest;
3115: if (defined($therest[0])) {
3116: $rest=join('.',@therest);
3117: } else {
3118: $rest='';
3119: }
3120:
3121: my $qualifierrest=$qualifier;
3122: if ($rest) { $qualifierrest.='.'.$rest; }
3123: my $spacequalifierrest=$space;
3124: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
3125: if ($realm eq 'user') {
3126: # --------------------------------------------------------------- user.resource
3127: if ($space eq 'resource') {
3128: if (defined($Apache::lonhomework::parsing_a_problem)) {
3129: return $Apache::lonhomework::history{$qualifierrest};
3130: } else {
3131: my %restored;
3132: if ($publicuser || $ENV{'request.state'} eq 'construct') {
3133: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
3134: } else {
3135: %restored=&restore($symbparm,$courseid,$udom,$uname);
3136: }
3137: return $restored{$qualifierrest};
3138: }
3139: # ----------------------------------------------------------------- user.access
3140: } elsif ($space eq 'access') {
3141: # FIXME - not supporting calls for a specific user
3142: return &allowed($qualifier,$rest);
3143: # ------------------------------------------ user.preferences, user.environment
3144: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
3145: if (($uname eq $ENV{'user.name'}) &&
3146: ($udom eq $ENV{'user.domain'})) {
3147: return $ENV{join('.',('environment',$qualifierrest))};
3148: } else {
3149: my %returnhash;
3150: if (!$publicuser) {
3151: %returnhash=&userenvironment($udom,$uname,
3152: $qualifierrest);
3153: }
3154: return $returnhash{$qualifierrest};
3155: }
3156: # ----------------------------------------------------------------- user.course
3157: } elsif ($space eq 'course') {
3158: # FIXME - not supporting calls for a specific user
3159: return $ENV{join('.',('request.course',$qualifier))};
3160: # ------------------------------------------------------------------- user.role
3161: } elsif ($space eq 'role') {
3162: # FIXME - not supporting calls for a specific user
3163: my ($role,$where)=split(/\./,$ENV{'request.role'});
3164: if ($qualifier eq 'value') {
3165: return $role;
3166: } elsif ($qualifier eq 'extent') {
3167: return $where;
3168: }
3169: # ----------------------------------------------------------------- user.domain
3170: } elsif ($space eq 'domain') {
3171: return $udom;
3172: # ------------------------------------------------------------------- user.name
3173: } elsif ($space eq 'name') {
3174: return $uname;
3175: # ---------------------------------------------------- Any other user namespace
3176: } else {
3177: my %reply;
3178: if (!$publicuser) {
3179: %reply=&get($space,[$qualifierrest],$udom,$uname);
3180: }
3181: return $reply{$qualifierrest};
3182: }
3183: } elsif ($realm eq 'query') {
3184: # ---------------------------------------------- pull stuff out of query string
3185: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
3186: return $ENV{'form.'.$space};
3187: } elsif ($realm eq 'request') {
3188: # ------------------------------------------------------------- request.browser
3189: if ($space eq 'browser') {
3190: return $ENV{'browser.'.$qualifier};
3191: # ------------------------------------------------------------ request.filename
3192: } else {
3193: return $ENV{'request.'.$spacequalifierrest};
3194: }
3195: } elsif ($realm eq 'course') {
3196: # ---------------------------------------------------------- course.description
3197: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3198: } elsif ($realm eq 'resource') {
3199:
3200: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
3201:
3202: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3203:
3204: # ----------------------------------------------------- Cascading lookup scheme
3205: if (!$symbparm) { $symbparm=&symbread(); }
3206: my $symbp=$symbparm;
3207: my $mapp=(split(/\_\_\_/,$symbp))[0];
3208:
3209: my $symbparm=$symbp.'.'.$spacequalifierrest;
3210: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3211:
3212: my $section;
3213: if (($ENV{'user.name'} eq $uname) &&
3214: ($ENV{'user.domain'} eq $udom)) {
3215: $section=$ENV{'request.course.sec'};
3216: } else {
3217: $section=&usection($udom,$uname,$courseid);
3218: }
3219:
3220: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3221: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3222: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3223:
3224: my $courselevel=$courseid.'.'.$spacequalifierrest;
3225: my $courselevelr=$courseid.'.'.$symbparm;
3226: my $courselevelm=$courseid.'.'.$mapparm;
3227:
3228: # ----------------------------------------------------------- first, check user
3229: #most student don't have any data set, check if there is some data
3230: #every thirty minutes
3231: if (!
3232: (exists($ENV{'cache.studentresdata'})
3233: && (($ENV{'cache.studentresdata'}+1800) > time))) {
3234: my %resourcedata=&get('resourcedata',
3235: [$courselevelr,$courselevelm,$courselevel],
3236: $udom,$uname);
3237: my ($tmp)=keys(%resourcedata);
3238: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3239: if ($resourcedata{$courselevelr}) {
3240: return $resourcedata{$courselevelr}; }
3241: if ($resourcedata{$courselevelm}) {
3242: return $resourcedata{$courselevelm}; }
3243: if ($resourcedata{$courselevel}) {
3244: return $resourcedata{$courselevel}; }
3245: } else {
3246: if ($tmp!~/No such file/) {
3247: &logthis("<font color=blue>WARNING:".
3248: " Trying to get resource data for ".
3249: $uname." at ".$udom.": ".
3250: $tmp."</font>");
3251: } elsif ($tmp=~/error:No such file/) {
3252: $ENV{'cache.studentresdata'}=time;
3253: &appenv(('cache.studentresdata'=>
3254: $ENV{'cache.studentresdata'}));
3255: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3256: return $tmp;
3257: }
3258: }
3259: }
3260:
3261: # -------------------------------------------------------- second, check course
3262:
3263: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3264: $ENV{'course.'.$courseid.'.domain'},
3265: ($seclevelr,$seclevelm,$seclevel,
3266: $courselevelr,$courselevelm,
3267: $courselevel));
3268: if (defined($coursereply)) { return $coursereply; }
3269:
3270: # ------------------------------------------------------ third, check map parms
3271: my %parmhash=();
3272: my $thisparm='';
3273: if (tie(%parmhash,'GDBM_File',
3274: $ENV{'request.course.fn'}.'_parms.db',
3275: &GDBM_READER(),0640)) {
3276: $thisparm=$parmhash{$symbparm};
3277: untie(%parmhash);
3278: }
3279: if ($thisparm) { return $thisparm; }
3280: }
3281: # --------------------------------------------- last, look in resource metadata
3282:
3283: $spacequalifierrest=~s/\./\_/;
3284: my $filename;
3285: if (!$symbparm) { $symbparm=&symbread(); }
3286: if ($symbparm) {
3287: $filename=(split(/\_\_\_/,$symbparm))[2];
3288: } else {
3289: $filename=$ENV{'request.filename'};
3290: }
3291: my $metadata=&metadata($filename,$spacequalifierrest);
3292: if (defined($metadata)) { return $metadata; }
3293: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3294: if (defined($metadata)) { return $metadata; }
3295:
3296: # ------------------------------------------------------------------ Cascade up
3297: unless ($space eq '0') {
3298: my @parts=split(/_/,$space);
3299: my $id=pop(@parts);
3300: my $part=join('_',@parts);
3301: if ($part eq '') { $part='0'; }
3302: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3303: $symbparm,$udom,$uname);
3304: if (defined($partgeneral)) { return $partgeneral; }
3305: }
3306:
3307: # ---------------------------------------------------- Any other user namespace
3308: } elsif ($realm eq 'environment') {
3309: # ----------------------------------------------------------------- environment
3310: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3311: return $ENV{'environment.'.$spacequalifierrest};
3312: } else {
3313: my %returnhash=&userenvironment($udom,$uname,
3314: $spacequalifierrest);
3315: return $returnhash{$spacequalifierrest};
3316: }
3317: } elsif ($realm eq 'system') {
3318: # ----------------------------------------------------------------- system.time
3319: if ($space eq 'time') {
3320: return time;
3321: }
3322: }
3323: return '';
3324: }
3325:
3326: sub add_prefix_and_part {
3327: my ($prefix,$part)=@_;
3328: my $keyroot;
3329: if (defined($prefix) && $prefix !~ /^__/) {
3330: # prefix that has a part already
3331: $keyroot=$prefix;
3332: } elsif (defined($prefix)) {
3333: # prefix that is missing a part
3334: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3335: } else {
3336: # no prefix at all
3337: if (defined($part)) { $keyroot='_'.$part; }
3338: }
3339: return $keyroot;
3340: }
3341:
3342: # ---------------------------------------------------------------- Get metadata
3343:
3344: sub metadata {
3345: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3346:
3347: $uri=&declutter($uri);
3348: # if it is a non metadata possible uri return quickly
3349: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3350: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
3351: return '';
3352: }
3353: my $filename=$uri;
3354: $uri=~s/\.meta$//;
3355: #
3356: # Is the metadata already cached?
3357: # Look at timestamp of caching
3358: # Everything is cached by the main uri, libraries are never directly cached
3359: #
3360: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3361: #
3362: # Is this a recursive call for a library?
3363: #
3364: if ($liburi) {
3365: $liburi=&declutter($liburi);
3366: $filename=$liburi;
3367: }
3368: my %metathesekeys=();
3369: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3370: my $metastring=&getfile(&filelocation('',&clutter($filename)));
3371: my $parser=HTML::LCParser->new(\$metastring);
3372: my $token;
3373: undef %metathesekeys;
3374: while ($token=$parser->get_token) {
3375: if ($token->[0] eq 'S') {
3376: if (defined($token->[2]->{'package'})) {
3377: #
3378: # This is a package - get package info
3379: #
3380: my $package=$token->[2]->{'package'};
3381: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3382: if (defined($token->[2]->{'id'})) {
3383: $keyroot.='_'.$token->[2]->{'id'};
3384: }
3385: if ($metacache{$uri.':packages'}) {
3386: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3387: } else {
3388: $metacache{$uri.':packages'}=$package.$keyroot;
3389: }
3390: foreach (keys %packagetab) {
3391: if ($_=~/^$package\&/) {
3392: my ($pack,$name,$subp)=split(/\&/,$_);
3393: my $value=$packagetab{$_};
3394: my $part=$keyroot;
3395: $part=~s/^\_//;
3396: if ($subp eq 'display') {
3397: $value.=' [Part: '.$part.']';
3398: }
3399: my $unikey='parameter'.$keyroot.'_'.$name;
3400: if ($subp eq 'default') {
3401: $unikey='parameter_0_'.$name;
3402: $metacache{$uri.':'.$unikey.'.part'}='0';
3403: } else {
3404: $metacache{$uri.':'.$unikey.'.part'}=$part;
3405: $metathesekeys{$unikey}=1;
3406: }
3407: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3408: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3409: }
3410: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3411: $metacache{$uri.':'.$unikey}=
3412: $metacache{$uri.':'.$unikey.'.default'};
3413: }
3414: }
3415: }
3416: } else {
3417: #
3418: # This is not a package - some other kind of start tag
3419: #
3420: my $entry=$token->[1];
3421: my $unikey;
3422: if ($entry eq 'import') {
3423: $unikey='';
3424: } else {
3425: $unikey=$entry;
3426: }
3427: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3428:
3429: if (defined($token->[2]->{'id'})) {
3430: $unikey.='_'.$token->[2]->{'id'};
3431: }
3432:
3433: if ($entry eq 'import') {
3434: #
3435: # Importing a library here
3436: #
3437: if ($depthcount<20) {
3438: my $location=$parser->get_text('/import');
3439: my $dir=$filename;
3440: $dir=~s|[^/]*$||;
3441: $location=&filelocation($dir,$location);
3442: foreach (sort(split(/\,/,&metadata($uri,'keys',
3443: $location,$unikey,
3444: $depthcount+1)))) {
3445: $metathesekeys{$_}=1;
3446: }
3447: }
3448: } else {
3449:
3450: if (defined($token->[2]->{'name'})) {
3451: $unikey.='_'.$token->[2]->{'name'};
3452: }
3453: $metathesekeys{$unikey}=1;
3454: foreach (@{$token->[3]}) {
3455: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3456: }
3457: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3458: my $default=$metacache{$uri.':'.$unikey.'.default'};
3459: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3460: # only ws inside the tag, and not in default, so use default
3461: # as value
3462: $metacache{$uri.':'.$unikey}=$default;
3463: } else {
3464: # either something interesting inside the tag or default
3465: # uninteresting
3466: $metacache{$uri.':'.$unikey}=$internaltext;
3467: }
3468: # end of not-a-package not-a-library import
3469: }
3470: # end of not-a-package start tag
3471: }
3472: # the next is the end of "start tag"
3473: }
3474: }
3475: # are there custom rights to evaluate
3476: if ($metacache{$uri.':copyright'} eq 'custom') {
3477:
3478: #
3479: # Importing a rights file here
3480: #
3481: unless ($depthcount) {
3482: my $location=$metacache{$uri.':customdistributionfile'};
3483: my $dir=$filename;
3484: $dir=~s|[^/]*$||;
3485: $location=&filelocation($dir,$location);
3486: foreach (sort(split(/\,/,&metadata($uri,'keys',
3487: $location,'_rights',
3488: $depthcount+1)))) {
3489: $metathesekeys{$_}=1;
3490: }
3491: }
3492: }
3493: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3494: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3495: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3496: $metacache{$uri.':cachedtimestamp'}=time;
3497: # this is the end of "was not already recently cached
3498: }
3499: return $metacache{$uri.':'.$what};
3500: }
3501:
3502: sub metadata_generate_part0 {
3503: my ($metadata,$metacache,$uri) = @_;
3504: my %allnames;
3505: foreach my $metakey (sort keys %$metadata) {
3506: if ($metakey=~/^parameter\_(.*)/) {
3507: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3508: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3509: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
3510: $allnames{$name}=$part;
3511: }
3512: }
3513: }
3514: foreach my $name (keys(%allnames)) {
3515: $$metadata{"parameter_0_$name"}=1;
3516: my $key="$uri:parameter_0_$name";
3517: $$metacache{"$key.part"}='0';
3518: $$metacache{"$key.name"}=$name;
3519: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3520: $allnames{$name}.'_'.$name.
3521: '.type'};
3522: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3523: '.display'};
3524: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3525: $olddis=~s/$expr/\[Part: 0\]/;
3526: $$metacache{"$key.display"}=$olddis;
3527: }
3528: }
3529:
3530: # ------------------------------------------------- Get the title of a resource
3531:
3532: sub gettitle {
3533: my $urlsymb=shift;
3534: my $symb=&symbread($urlsymb);
3535: unless ($symb) {
3536: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3537: return &metadata($urlsymb,'title');
3538: }
3539: if ($titlecache{$symb}) { return $titlecache{$symb}; }
3540: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3541: my $title='';
3542: my %bighash;
3543: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3544: &GDBM_READER(),0640)) {
3545: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3546: $title=$bighash{'title_'.$mapid.'.'.$resid};
3547: untie %bighash;
3548: }
3549: $title=~s/\&colon\;/\:/gs;
3550: if ($title) {
3551: $titlecache{$symb}=$title;
3552: return $title;
3553: } else {
3554: return &metadata($urlsymb,'title');
3555: }
3556: }
3557:
3558: # ------------------------------------------------- Update symbolic store links
3559:
3560: sub symblist {
3561: my ($mapname,%newhash)=@_;
3562: $mapname=declutter($mapname);
3563: my %hash;
3564: if (($ENV{'request.course.fn'}) && (%newhash)) {
3565: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3566: &GDBM_WRCREAT(),0640)) {
3567: foreach (keys %newhash) {
3568: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3569: }
3570: if (untie(%hash)) {
3571: return 'ok';
3572: }
3573: }
3574: }
3575: return 'error';
3576: }
3577:
3578: # --------------------------------------------------------------- Verify a symb
3579:
3580: sub symbverify {
3581: my ($symb,$thisfn)=@_;
3582: $thisfn=&declutter($thisfn);
3583: # direct jump to resource in page or to a sequence - will construct own symbs
3584: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3585: # check URL part
3586: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3587: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3588:
3589: $symb=&symbclean($symb);
3590:
3591: my %bighash;
3592: my $okay=0;
3593: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3594: &GDBM_READER(),0640)) {
3595: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3596: unless ($ids) {
3597: $ids=$bighash{'ids_/'.$thisfn};
3598: }
3599: if ($ids) {
3600: # ------------------------------------------------------------------- Has ID(s)
3601: foreach (split(/\,/,$ids)) {
3602: my ($mapid,$resid)=split(/\./,$_);
3603: if (
3604: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3605: eq $symb) {
3606: $okay=1;
3607: }
3608: }
3609: }
3610: untie(%bighash);
3611: }
3612: return $okay;
3613: }
3614:
3615: # --------------------------------------------------------------- Clean-up symb
3616:
3617: sub symbclean {
3618: my $symb=shift;
3619:
3620: # remove version from map
3621: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3622:
3623: # remove version from URL
3624: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3625:
3626: return $symb;
3627: }
3628:
3629: # ------------------------------------------------------ Return symb list entry
3630:
3631: sub symbread {
3632: my ($thisfn,$donotrecurse)=@_;
3633: # no filename provided? try from environment
3634: unless ($thisfn) {
3635: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3636: $thisfn=$ENV{'request.filename'};
3637: }
3638: # is that filename actually a symb? Verify, clean, and return
3639: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3640: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3641: }
3642: $thisfn=declutter($thisfn);
3643: my %hash;
3644: my %bighash;
3645: my $syval='';
3646: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3647: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3648: &GDBM_READER(),0640)) {
3649: $syval=$hash{$thisfn};
3650: untie(%hash);
3651: }
3652: # ---------------------------------------------------------- There was an entry
3653: if ($syval) {
3654: unless ($syval=~/\_\d+$/) {
3655: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3656: &appenv('request.ambiguous' => $thisfn);
3657: return '';
3658: }
3659: $syval.=$1;
3660: }
3661: } else {
3662: # ------------------------------------------------------- Was not in symb table
3663: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3664: &GDBM_READER(),0640)) {
3665: # ---------------------------------------------- Get ID(s) for current resource
3666: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3667: unless ($ids) {
3668: $ids=$bighash{'ids_/'.$thisfn};
3669: }
3670: unless ($ids) {
3671: # alias?
3672: $ids=$bighash{'mapalias_'.$thisfn};
3673: }
3674: if ($ids) {
3675: # ------------------------------------------------------------------- Has ID(s)
3676: my @possibilities=split(/\,/,$ids);
3677: if ($#possibilities==0) {
3678: # ----------------------------------------------- There is only one possibility
3679: my ($mapid,$resid)=split(/\./,$ids);
3680: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3681: } elsif (!$donotrecurse) {
3682: # ------------------------------------------ There is more than one possibility
3683: my $realpossible=0;
3684: foreach (@possibilities) {
3685: my $file=$bighash{'src_'.$_};
3686: if (&allowed('bre',$file)) {
3687: my ($mapid,$resid)=split(/\./,$_);
3688: if ($bighash{'map_type_'.$mapid} ne 'page') {
3689: $realpossible++;
3690: $syval=declutter($bighash{'map_id_'.$mapid}).
3691: '___'.$resid;
3692: }
3693: }
3694: }
3695: if ($realpossible!=1) { $syval=''; }
3696: } else {
3697: $syval='';
3698: }
3699: }
3700: untie(%bighash)
3701: }
3702: }
3703: if ($syval) {
3704: return &symbclean($syval.'___'.$thisfn);
3705: }
3706: }
3707: &appenv('request.ambiguous' => $thisfn);
3708: return '';
3709: }
3710:
3711: # ---------------------------------------------------------- Return random seed
3712:
3713: sub numval {
3714: my $txt=shift;
3715: $txt=~tr/A-J/0-9/;
3716: $txt=~tr/a-j/0-9/;
3717: $txt=~tr/K-T/0-9/;
3718: $txt=~tr/k-t/0-9/;
3719: $txt=~tr/U-Z/0-5/;
3720: $txt=~tr/u-z/0-5/;
3721: $txt=~s/\D//g;
3722: return int($txt);
3723: }
3724:
3725: sub rndseed {
3726: my ($symb,$courseid,$domain,$username)=@_;
3727: if (!$symb) {
3728: unless ($symb=&symbread()) { return time; }
3729: }
3730: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3731: if (!$domain) {$domain=$ENV{'user.domain'};}
3732: if (!$username) {$username=$ENV{'user.name'};}
3733: {
3734: use integer;
3735: my $symbchck=unpack("%32C*",$symb) << 27;
3736: my $symbseed=numval($symb) << 22;
3737: my $namechck=unpack("%32C*",$username) << 17;
3738: my $nameseed=numval($username) << 12;
3739: my $domainseed=unpack("%32C*",$domain) << 7;
3740: my $courseseed=unpack("%32C*",$courseid);
3741: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3742: #uncommenting these lines can break things!
3743: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3744: #&Apache::lonxml::debug("rndseed :$num:$symb");
3745: return $num;
3746: }
3747: }
3748:
3749: sub ireceipt {
3750: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3751: my $cuname=unpack("%32C*",$funame);
3752: my $cudom=unpack("%32C*",$fudom);
3753: my $cucourseid=unpack("%32C*",$fucourseid);
3754: my $cusymb=unpack("%32C*",$fusymb);
3755: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3756: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3757: ($cunique%$cuname+
3758: $cunique%$cudom+
3759: $cusymb%$cuname+
3760: $cusymb%$cudom+
3761: $cucourseid%$cuname+
3762: $cucourseid%$cudom);
3763: }
3764:
3765: sub receipt {
3766: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3767: return &ireceipt($name,$domain,$courseid,$symb);
3768: }
3769:
3770: # ------------------------------------------------------------ Serves up a file
3771: # returns either the contents of the file or a -1
3772: sub getfile {
3773: my $file=shift;
3774: if ($file=~/^\/*uploaded\//) { # user file
3775: my $ua=new LWP::UserAgent;
3776: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3777: my $response=$ua->request($request);
3778: if ($response->is_success()) {
3779: return $response->content;
3780: } else {
3781: return -1;
3782: }
3783: } else { # normal file from res space
3784: &repcopy($file);
3785: if (! -e $file ) { return -1; };
3786: my $fh=Apache::File->new($file);
3787: my $a='';
3788: while (<$fh>) { $a .=$_; }
3789: return $a;
3790: }
3791: }
3792:
3793: sub filelocation {
3794: my ($dir,$file) = @_;
3795: my $location;
3796: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3797: if ($file=~m:^/~:) { # is a contruction space reference
3798: $location = $file;
3799: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3800: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3801: $location=$file;
3802: } else {
3803: $file=~s/^$perlvar{'lonDocRoot'}//;
3804: $file=~s:^/*res::;
3805: if ( !( $file =~ m:^/:) ) {
3806: $location = $dir. '/'.$file;
3807: } else {
3808: $location = '/home/httpd/html/res'.$file;
3809: }
3810: }
3811: $location=~s://+:/:g; # remove duplicate /
3812: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3813: return $location;
3814: }
3815:
3816: sub hreflocation {
3817: my ($dir,$file)=@_;
3818: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3819: my $finalpath=filelocation($dir,$file);
3820: $finalpath=~s/^\/home\/httpd\/html//;
3821: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3822: return $finalpath;
3823: } else {
3824: return $file;
3825: }
3826: }
3827:
3828: # ------------------------------------------------------------- Declutters URLs
3829:
3830: sub declutter {
3831: my $thisfn=shift;
3832: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3833: $thisfn=~s/^\///;
3834: $thisfn=~s/^res\///;
3835: $thisfn=~s/\?.+$//;
3836: return $thisfn;
3837: }
3838:
3839: # ------------------------------------------------------------- Clutter up URLs
3840:
3841: sub clutter {
3842: my $thisfn='/'.&declutter(shift);
3843: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3844: $thisfn='/res'.$thisfn;
3845: }
3846: return $thisfn;
3847: }
3848:
3849: # -------------------------------------------------------- Escape Special Chars
3850:
3851: sub escape {
3852: my $str=shift;
3853: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3854: return $str;
3855: }
3856:
3857: # ----------------------------------------------------- Un-Escape Special Chars
3858:
3859: sub unescape {
3860: my $str=shift;
3861: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3862: return $str;
3863: }
3864:
3865: # ================================================================ Main Program
3866:
3867: sub goodbye {
3868: &logthis("Starting Shut down");
3869: &flushcourselogs();
3870: &logthis("Shutting down");
3871: return DONE;
3872: }
3873:
3874: BEGIN {
3875: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3876: unless ($readit) {
3877: {
3878: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3879:
3880: while (my $configline=<$config>) {
3881: if ($configline =~ /^[^\#]*PerlSetVar/) {
3882: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3883: chomp($varvalue);
3884: $perlvar{$varname}=$varvalue;
3885: }
3886: }
3887: }
3888: {
3889: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3890:
3891: while (my $configline=<$config>) {
3892: if ($configline =~ /^[^\#]*PerlSetVar/) {
3893: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3894: chomp($varvalue);
3895: $perlvar{$varname}=$varvalue;
3896: }
3897: }
3898: }
3899:
3900: # ------------------------------------------------------------ Read domain file
3901: {
3902: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
3903: '/domain.tab');
3904: %domaindescription = ();
3905: %domain_auth_def = ();
3906: %domain_auth_arg_def = ();
3907: if ($fh) {
3908: while (<$fh>) {
3909: next if /^\#/;
3910: chomp;
3911: my ($domain, $domain_description, $def_auth, $def_auth_arg)
3912: = split(/:/,$_,4);
3913: $domain_auth_def{$domain}=$def_auth;
3914: $domain_auth_arg_def{$domain}=$def_auth_arg;
3915: $domaindescription{$domain}=$domain_description;
3916: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
3917: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
3918: }
3919: }
3920: }
3921:
3922:
3923: # ------------------------------------------------------------- Read hosts file
3924: {
3925: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3926:
3927: while (my $configline=<$config>) {
3928: next if ($configline =~ /^(\#|\s*$)/);
3929: chomp($configline);
3930: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3931: if ($id && $domain && $role && $name && $ip) {
3932: $hostname{$id}=$name;
3933: $hostdom{$id}=$domain;
3934: $hostip{$id}=$ip;
3935: $iphost{$ip}=$id;
3936: if ($role eq 'library') { $libserv{$id}=$name; }
3937: } else {
3938: if ($configline) {
3939: &logthis("Skipping hosts.tab line -$configline-");
3940: }
3941: }
3942: }
3943: }
3944:
3945: # ------------------------------------------------------ Read spare server file
3946: {
3947: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3948:
3949: while (my $configline=<$config>) {
3950: chomp($configline);
3951: if ($configline) {
3952: $spareid{$configline}=1;
3953: }
3954: }
3955: }
3956: # ------------------------------------------------------------ Read permissions
3957: {
3958: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3959:
3960: while (my $configline=<$config>) {
3961: chomp($configline);
3962: if ($configline) {
3963: my ($role,$perm)=split(/ /,$configline);
3964: if ($perm ne '') { $pr{$role}=$perm; }
3965: }
3966: }
3967: }
3968:
3969: # -------------------------------------------- Read plain texts for permissions
3970: {
3971: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3972:
3973: while (my $configline=<$config>) {
3974: chomp($configline);
3975: if ($configline) {
3976: my ($short,$plain)=split(/:/,$configline);
3977: if ($plain ne '') { $prp{$short}=$plain; }
3978: }
3979: }
3980: }
3981:
3982: # ---------------------------------------------------------- Read package table
3983: {
3984: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3985:
3986: while (my $configline=<$config>) {
3987: chomp($configline);
3988: my ($short,$plain)=split(/:/,$configline);
3989: my ($pack,$name)=split(/\&/,$short);
3990: if ($plain ne '') {
3991: $packagetab{$pack.'&'.$name.'&name'}=$name;
3992: $packagetab{$short}=$plain;
3993: }
3994: }
3995: }
3996:
3997: # ------------- set up temporary directory
3998: {
3999: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
4000:
4001: }
4002:
4003: %metacache=();
4004:
4005: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
4006: $dumpcount=0;
4007:
4008: &logtouch();
4009: &logthis('<font color=yellow>INFO: Read configuration</font>');
4010: $readit=1;
4011: }
4012: }
4013:
4014: 1;
4015: __END__
4016:
4017: =pod
4018:
4019: =head1 NAME
4020:
4021: Apache::lonnet - Subroutines to ask questions about things in the network.
4022:
4023: =head1 SYNOPSIS
4024:
4025: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
4026:
4027: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
4028:
4029: Common parameters:
4030:
4031: =over 4
4032:
4033: =item *
4034:
4035: $uname : an internal username (if $cname expecting a course Id specifically)
4036:
4037: =item *
4038:
4039: $udom : a domain (if $cdom expecting a course's domain specifically)
4040:
4041: =item *
4042:
4043: $symb : a resource instance identifier
4044:
4045: =item *
4046:
4047: $namespace : the name of a .db file that contains the data needed or
4048: being set.
4049:
4050: =back
4051:
4052: =head1 INTRODUCTION
4053:
4054: This module provides subroutines which interact with the
4055: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
4056: - classes
4057: - users
4058: - resources
4059:
4060: For many of these objects you can also use this to store data about
4061: them or modify them in various ways.
4062:
4063: This is part of the LearningOnline Network with CAPA project
4064: described at http://www.lon-capa.org.
4065:
4066: =head1 RETURN MESSAGES
4067:
4068: =over 4
4069:
4070: =item *
4071:
4072: con_lost : unable to contact remote host
4073:
4074: =item *
4075:
4076: con_delayed : unable to contact remote host, message will be delivered
4077: when the connection is brought back up
4078:
4079: =item *
4080:
4081: con_failed : unable to contact remote host and unable to save message
4082: for later delivery
4083:
4084: =item *
4085:
4086: error: : an error a occured, a description of the error follows the :
4087:
4088: =item *
4089:
4090: no_such_host : unable to fund a host associated with the user/domain
4091: that was requested
4092:
4093: =back
4094:
4095: =head1 PUBLIC SUBROUTINES
4096:
4097: =head2 Session Environment Functions
4098:
4099: =over 4
4100:
4101: =item *
4102:
4103: appenv(%hash) : the value of %hash is written to the user envirnoment
4104: file, and will be restored for each access this user makes during this
4105: session, also modifies the %ENV for the current process
4106:
4107: =item *
4108:
4109: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
4110:
4111: =back
4112:
4113: =head2 User Information
4114:
4115: =over 4
4116:
4117: =item *
4118:
4119: queryauthenticate($uname,$udom) : try to determine user's current
4120: authentication scheme
4121:
4122: =item *
4123:
4124: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
4125: servers (first use the current one), $upass should be the users password
4126:
4127: =item *
4128:
4129: homeserver($uname,$udom) : find the server which has the user's
4130: directory and files (there must be only one), this caches the answer,
4131: and also caches if there is a borken connection.
4132:
4133: =item *
4134:
4135: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
4136: unique resource in a domain, there must be only 1 ID per username, and
4137: only 1 username per ID in a specific domain) (returns hash:
4138: id=>name,id=>name)
4139:
4140: =item *
4141:
4142: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
4143: name=>id,name=>id)
4144:
4145: =item *
4146:
4147: idput($udom,%ids) : store away a list of names and associated IDs
4148:
4149: =item *
4150:
4151: rolesinit($udom,$username,$authhost) : get user privileges
4152:
4153: =item *
4154:
4155: usection($udom,$uname,$cname) : finds the section of student in the
4156: course $cname, return section name/number or '' for "not in course"
4157: and '-1' for "no section"
4158:
4159: =item *
4160:
4161: userenvironment($udom,$uname,@what) : gets the values of the keys
4162: passed in @what from the requested user's environment, returns a hash
4163:
4164: =back
4165:
4166: =head2 User Roles
4167:
4168: =over 4
4169:
4170: =item *
4171:
4172: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
4173: actions
4174: F: full access
4175: U,I,K: authentication modes (cxx only)
4176: '': forbidden
4177: 1: user needs to choose course
4178: 2: browse allowed
4179:
4180: =item *
4181:
4182: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4183: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4184: and course level
4185:
4186: =item *
4187:
4188: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4189: explanation of a user role term
4190:
4191: =back
4192:
4193: =head2 User Modification
4194:
4195: =over 4
4196:
4197: =item *
4198:
4199: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4200: user for the level given by URL. Optional start and end dates (leave empty
4201: string or zero for "no date")
4202:
4203: =item *
4204:
4205: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4206: change a users, password, possible return values are: ok,
4207: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4208: refused
4209:
4210: =item *
4211:
4212: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
4213:
4214: =item *
4215:
4216: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4217: modify user
4218:
4219: =item *
4220:
4221: modifystudent
4222:
4223: modify a students enrollment and identification information.
4224: The course id is resolved based on the current users environment.
4225: This means the envoking user must be a course coordinator or otherwise
4226: associated with a course.
4227:
4228: This call is essentially a wrapper for lonnet::modifyuser and
4229: lonnet::modify_student_enrollment
4230:
4231: Inputs:
4232:
4233: =over 4
4234:
4235: =item B<$udom> Students loncapa domain
4236:
4237: =item B<$uname> Students loncapa login name
4238:
4239: =item B<$uid> Students id/student number
4240:
4241: =item B<$umode> Students authentication mode
4242:
4243: =item B<$upass> Students password
4244:
4245: =item B<$first> Students first name
4246:
4247: =item B<$middle> Students middle name
4248:
4249: =item B<$last> Students last name
4250:
4251: =item B<$gene> Students generation
4252:
4253: =item B<$usec> Students section in course
4254:
4255: =item B<$end> Unix time of the roles expiration
4256:
4257: =item B<$start> Unix time of the roles start date
4258:
4259: =item B<$forceid> If defined, allow $uid to be changed
4260:
4261: =item B<$desiredhome> server to use as home server for student
4262:
4263: =back
4264:
4265: =item *
4266:
4267: modify_student_enrollment
4268:
4269: Change a students enrollment status in a class. The environment variable
4270: 'role.request.course' must be defined for this function to proceed.
4271:
4272: Inputs:
4273:
4274: =over 4
4275:
4276: =item $udom, students domain
4277:
4278: =item $uname, students name
4279:
4280: =item $uid, students user id
4281:
4282: =item $first, students first name
4283:
4284: =item $middle
4285:
4286: =item $last
4287:
4288: =item $gene
4289:
4290: =item $usec
4291:
4292: =item $end
4293:
4294: =item $start
4295:
4296: =back
4297:
4298:
4299: =item *
4300:
4301: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4302: custom role; give a custom role to a user for the level given by URL. Specify
4303: name and domain of role author, and role name
4304:
4305: =item *
4306:
4307: revokerole($udom,$uname,$url,$role) : revoke a role for url
4308:
4309: =item *
4310:
4311: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4312:
4313: =back
4314:
4315: =head2 Course Infomation
4316:
4317: =over 4
4318:
4319: =item *
4320:
4321: coursedescription($courseid) : course description
4322:
4323: =item *
4324:
4325: courseresdata($coursenum,$coursedomain,@which) : request for current
4326: parameter setting for a specific course, @what should be a list of
4327: parameters to ask about. This routine caches answers for 5 minutes.
4328:
4329: =back
4330:
4331: =head2 Course Modification
4332:
4333: =over 4
4334:
4335: =item *
4336:
4337: writecoursepref($courseid,%prefs) : write preferences (environment
4338: database) for a course
4339:
4340: =item *
4341:
4342: createcourse($udom,$description,$url) : make/modify course
4343:
4344: =back
4345:
4346: =head2 Resource Subroutines
4347:
4348: =over 4
4349:
4350: =item *
4351:
4352: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
4353:
4354: =item *
4355:
4356: repcopy($filename) : subscribes to the requested file, and attempts to
4357: replicate from the owning library server, Might return
4358: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4359: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4360: resource. Expects the local filesystem pathname
4361: (/home/httpd/html/res/....)
4362:
4363: =back
4364:
4365: =head2 Resource Information
4366:
4367: =over 4
4368:
4369: =item *
4370:
4371: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4372: a vairety of different possible values, $varname should be a request
4373: string, and the other parameters can be used to specify who and what
4374: one is asking about.
4375:
4376: Possible values for $varname are environment.lastname (or other item
4377: from the envirnment hash), user.name (or someother aspect about the
4378: user), resource.0.maxtries (or some other part and parameter of a
4379: resource)
4380:
4381: =item *
4382:
4383: directcondval($number) : get current value of a condition; reads from a state
4384: string
4385:
4386: =item *
4387:
4388: condval($condidx) : value of condition index based on state
4389:
4390: =item *
4391:
4392: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4393: resource's metadata, $what should be either a specific key, or either
4394: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4395: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4396:
4397: this function automatically caches all requests
4398:
4399: =item *
4400:
4401: metadata_query($query,$custom,$customshow) : make a metadata query against the
4402: network of library servers; returns file handle of where SQL and regex results
4403: will be stored for query
4404:
4405: =item *
4406:
4407: symbread($filename) : return symbolic list entry (filename argument optional);
4408: returns the data handle
4409:
4410: =item *
4411:
4412: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4413: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4414: failure, user must be in a course, as it assumes the existance of the
4415: course initi hash, and uses $ENV('request.course.id'}
4416:
4417:
4418: =item *
4419:
4420: symbclean($symb) : removes versions numbers from a symb, returns the
4421: cleaned symb
4422:
4423: =item *
4424:
4425: is_on_map($uri) : checks if the $uri is somewhere on the current
4426: course map, user must be in a course for it to work.
4427:
4428: =item *
4429:
4430: numval($salt) : return random seed value (addend for rndseed)
4431:
4432: =item *
4433:
4434: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4435: a random seed, all arguments are optional, if they aren't sent it uses the
4436: environment to derive them. Note: if symb isn't sent and it can't get one
4437: from &symbread it will use the current time as its return value
4438:
4439: =item *
4440:
4441: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4442: unfakeable, receipt
4443:
4444: =item *
4445:
4446: receipt() : API to ireceipt working off of ENV values; given out to users
4447:
4448: =item *
4449:
4450: countacc($url) : count the number of accesses to a given URL
4451:
4452: =item *
4453:
4454: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4455:
4456: =item *
4457:
4458: checkin($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 $tcrsid)
4459:
4460: =item *
4461:
4462: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4463:
4464: =item *
4465:
4466: devalidate($symb) : devalidate temporary spreadsheet calculations,
4467: forcing spreadsheet to reevaluate the resource scores next time.
4468:
4469: =back
4470:
4471: =head2 Storing/Retreiving Data
4472:
4473: =over 4
4474:
4475: =item *
4476:
4477: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4478: for this url; hashref needs to be given and should be a \%hashname; the
4479: remaining args aren't required and if they aren't passed or are '' they will
4480: be derived from the ENV
4481:
4482: =item *
4483:
4484: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4485: uses critical subroutine
4486:
4487: =item *
4488:
4489: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4490: all args are optional
4491:
4492: =item *
4493:
4494: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4495: works very similar to store/cstore, but all data is stored in a
4496: temporary location and can be reset using tmpreset, $storehash should
4497: be a hash reference, returns nothing on success
4498:
4499: =item *
4500:
4501: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4502: similar to restore, but all data is stored in a temporary location and
4503: can be reset using tmpreset. Returns a hash of values on success,
4504: error string otherwise.
4505:
4506: =item *
4507:
4508: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4509: deltes all keys for $symb form the temporary storage hash.
4510:
4511: =item *
4512:
4513: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4514: reference filled in from namesp ($udom and $uname are optional)
4515:
4516: =item *
4517:
4518: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4519: namesp ($udom and $uname are optional)
4520:
4521: =item *
4522:
4523: dump($namespace,$udom,$uname,$regexp) :
4524: dumps the complete (or key matching regexp) namespace into a hash
4525: ($udom, $uname and $regexp are optional)
4526:
4527: =item *
4528:
4529: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4530: ($udom and $uname are optional)
4531:
4532: =item *
4533:
4534: cput($namespace,$storehash,$udom,$uname) : critical put
4535: ($udom and $uname are optional)
4536:
4537: =item *
4538:
4539: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4540: reference filled in from namesp (encrypts the return communication)
4541: ($udom and $uname are optional)
4542:
4543: =item *
4544:
4545: log($udom,$name,$home,$message) : write to permanent log for user; use
4546: critical subroutine
4547:
4548: =back
4549:
4550: =head2 Network Status Functions
4551:
4552: =over 4
4553:
4554: =item *
4555:
4556: dirlist($uri) : return directory list based on URI
4557:
4558: =item *
4559:
4560: spareserver() : find server with least workload from spare.tab
4561:
4562: =back
4563:
4564: =head2 Apache Request
4565:
4566: =over 4
4567:
4568: =item *
4569:
4570: ssi($url,%hash) : server side include, does a complete request cycle on url to
4571: localhost, posts hash
4572:
4573: =back
4574:
4575: =head2 Data to String to Data
4576:
4577: =over 4
4578:
4579: =item *
4580:
4581: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4582: and '&' separators, supports elements that are arrayrefs and hashrefs
4583:
4584: =item *
4585:
4586: hashref2str($hashref) : convert a hashref into a string complete with
4587: escaping and '=' and '&' separators, supports elements that are
4588: arrayrefs and hashrefs
4589:
4590: =item *
4591:
4592: arrayref2str($arrayref) : convert an arrayref into a string complete
4593: with escaping and '&' separators, supports elements that are arrayrefs
4594: and hashrefs
4595:
4596: =item *
4597:
4598: str2hash($string) : convert string to hash using unescaping and
4599: splitting on '=' and '&', supports elements that are arrayrefs and
4600: hashrefs
4601:
4602: =item *
4603:
4604: str2array($string) : convert string to hash using unescaping and
4605: splitting on '&', supports elements that are arrayrefs and hashrefs
4606:
4607: =back
4608:
4609: =head2 Logging Routines
4610:
4611: =over 4
4612:
4613: These routines allow one to make log messages in the lonnet.log and
4614: lonnet.perm logfiles.
4615:
4616: =item *
4617:
4618: logtouch() : make sure the logfile, lonnet.log, exists
4619:
4620: =item *
4621:
4622: logthis() : append message to the normal lonnet.log file, it gets
4623: preiodically rolled over and deleted.
4624:
4625: =item *
4626:
4627: logperm() : append a permanent message to lonnet.perm.log, this log
4628: file never gets deleted by any automated portion of the system, only
4629: messages of critical importance should go in here.
4630:
4631: =back
4632:
4633: =head2 General File Helper Routines
4634:
4635: =over 4
4636:
4637: =item *
4638:
4639: getfile($file) : returns the entire contents of a file or -1; it
4640: properly subscribes to and replicates the file if neccessary.
4641:
4642: =item *
4643:
4644: filelocation($dir,$file) : returns file system location of a file
4645: based on URI; meant to be "fairly clean" absolute reference, $dir is a
4646: directory that relative $file lookups are to looked in ($dir of /a/dir
4647: and a file of ../bob will become /a/bob)
4648:
4649: =item *
4650:
4651: hreflocation($dir,$file) : returns file system location or a URL; same as
4652: filelocation except for hrefs
4653:
4654: =item *
4655:
4656: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
4657:
4658: =back
4659:
4660: =head2 HTTP Helper Routines
4661:
4662: =over 4
4663:
4664: =item *
4665:
4666: escape() : unpack non-word characters into CGI-compatible hex codes
4667:
4668: =item *
4669:
4670: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
4671:
4672: =back
4673:
4674: =head1 PRIVATE SUBROUTINES
4675:
4676: =head2 Underlying communication routines (Shouldn't call)
4677:
4678: =over 4
4679:
4680: =item *
4681:
4682: subreply() : tries to pass a message to lonc, returns con_lost if incapable
4683:
4684: =item *
4685:
4686: reply() : uses subreply to send a message to remote machine, logs all failures
4687:
4688: =item *
4689:
4690: critical() : passes a critical message to another server; if cannot
4691: get through then place message in connection buffer directory and
4692: returns con_delayed, if incapable of saving message, returns
4693: con_failed
4694:
4695: =item *
4696:
4697: reconlonc() : tries to reconnect lonc client processes.
4698:
4699: =back
4700:
4701: =head2 Resource Access Logging
4702:
4703: =over 4
4704:
4705: =item *
4706:
4707: flushcourselogs() : flush (save) buffer logs and access logs
4708:
4709: =item *
4710:
4711: courselog($what) : save message for course in hash
4712:
4713: =item *
4714:
4715: courseacclog($what) : save message for course using &courselog(). Perform
4716: special processing for specific resource types (problems, exams, quizzes, etc).
4717:
4718: =item *
4719:
4720: goodbye() : flush course logs and log shutting down; it is called in srm.conf
4721: as a PerlChildExitHandler
4722:
4723: =back
4724:
4725: =head2 Other
4726:
4727: =over 4
4728:
4729: =item *
4730:
4731: symblist($mapname,%newhash) : update symbolic storage links
4732:
4733: =back
4734:
4735: =cut
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