Annotation of loncom/lonnet/perl/lonnet.pm, revision 1.247
1.1 albertel 1: # The LearningOnline Network
2: # TCP networking package
1.12 www 3: #
1.247 ! www 4: # $Id: lonnet.pm,v 1.246 2002/06/27 14:08:06 www Exp $
1.178 www 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: #
1.169 harris41 28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 02/27/01 Scott Harrison
51: # 3/2 Gerd Kortemeyer
52: # 3/15,3/19 Scott Harrison
53: # 3/19,3/20 Gerd Kortemeyer
54: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
55: # 5/26,5/28 Gerd Kortemeyer
56: # 5/30 H. K. Ng
57: # 6/1 Gerd Kortemeyer
58: # July Guy Albertelli
59: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
60: # 10/2 Gerd Kortemeyer
61: # 10/5,10/10,11/13,11/15 Scott Harrison
1.179 www 62: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
1.182 matthew 63: # 12/5 Matthew Hall
1.184 www 64: # 12/5 Guy Albertelli
1.190 www 65: # 12/6,12/7,12/12 Gerd Kortemeyer
1.191 harris41 66: # 12/18 Scott Harrison
1.195 www 67: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
1.196 www 68: # YEAR=2002
1.200 www 69: # 1/4,2/4,2/7 Gerd Kortemeyer
1.171 www 70: #
1.169 harris41 71: ###
72:
1.1 albertel 73: package Apache::lonnet;
74:
75: use strict;
76: use Apache::File;
1.8 www 77: use LWP::UserAgent();
1.15 www 78: use HTTP::Headers;
1.11 www 79: use vars
1.231 stredwic 80: qw(%perlvar %hostname %homecache %badServerCache %hostip %spareid %hostdom
1.192 www 81: %libserv %pr %prp %metacache %packagetab
1.188 www 82: %courselogs %accesshash $processmarker $dumpcount
1.245 www 83: %coursedombuf %coursehombuf %courseresdatacache %domaindescription);
1.1 albertel 84: use IO::Socket;
1.31 www 85: use GDBM_File;
1.8 www 86: use Apache::Constants qw(:common :http);
1.208 albertel 87: use HTML::LCParser;
1.88 www 88: use Fcntl qw(:flock);
1.195 www 89: my $readit;
1.1 albertel 90:
91: # --------------------------------------------------------------------- Logging
92:
1.163 harris41 93: sub logtouch {
94: my $execdir=$perlvar{'lonDaemons'};
95: unless (-e "$execdir/logs/lonnet.log") {
96: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
97: close $fh;
98: }
99: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
100: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
101: }
102:
1.1 albertel 103: sub logthis {
104: my $message=shift;
105: my $execdir=$perlvar{'lonDaemons'};
106: my $now=time;
107: my $local=localtime($now);
1.162 harris41 108: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
109: print $fh "$local ($$): $message\n";
1.1 albertel 110: return 1;
111: }
112:
113: sub logperm {
114: my $message=shift;
115: my $execdir=$perlvar{'lonDaemons'};
116: my $now=time;
117: my $local=localtime($now);
1.162 harris41 118: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
119: print $fh "$now:$message:$local\n";
1.1 albertel 120: return 1;
121: }
122:
123: # -------------------------------------------------- Non-critical communication
124: sub subreply {
125: my ($cmd,$server)=@_;
126: my $peerfile="$perlvar{'lonSockDir'}/$server";
127: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
128: Type => SOCK_STREAM,
129: Timeout => 10)
130: or return "con_lost";
131: print $client "$cmd\n";
132: my $answer=<$client>;
1.9 www 133: if (!$answer) { $answer="con_lost"; }
1.1 albertel 134: chomp($answer);
135: return $answer;
136: }
137:
138: sub reply {
139: my ($cmd,$server)=@_;
1.205 www 140: unless (defined($hostname{$server})) { return 'no_such_host'; }
1.1 albertel 141: my $answer=subreply($cmd,$server);
1.203 www 142: if ($answer eq 'con_lost') {
1.233 albertel 143: #sleep 5;
144: #$answer=subreply($cmd,$server);
145: #if ($answer eq 'con_lost') {
146: # &logthis("Second attempt con_lost on $server");
147: # my $peerfile="$perlvar{'lonSockDir'}/$server";
148: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
149: # Type => SOCK_STREAM,
150: # Timeout => 10)
151: # or return "con_lost";
152: # &logthis("Killing socket");
153: # print $client "close_connection_exit\n";
154: #sleep 5;
155: # $answer=subreply($cmd,$server);
156: #}
1.203 www 157: }
1.65 www 158: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
1.12 www 159: &logthis("<font color=blue>WARNING:".
160: " $cmd to $server returned $answer</font>");
161: }
1.1 albertel 162: return $answer;
163: }
164:
165: # ----------------------------------------------------------- Send USR1 to lonc
166:
167: sub reconlonc {
168: my $peerfile=shift;
169: &logthis("Trying to reconnect for $peerfile");
170: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
171: if (my $fh=Apache::File->new("$loncfile")) {
172: my $loncpid=<$fh>;
173: chomp($loncpid);
174: if (kill 0 => $loncpid) {
175: &logthis("lonc at pid $loncpid responding, sending USR1");
176: kill USR1 => $loncpid;
177: sleep 1;
178: if (-e "$peerfile") { return; }
179: &logthis("$peerfile still not there, give it another try");
180: sleep 5;
181: if (-e "$peerfile") { return; }
1.12 www 182: &logthis(
183: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
1.1 albertel 184: } else {
1.12 www 185: &logthis(
186: "<font color=blue>WARNING:".
187: " lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 188: }
189: } else {
1.12 www 190: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
1.1 albertel 191: }
192: }
193:
194: # ------------------------------------------------------ Critical communication
1.12 www 195:
1.1 albertel 196: sub critical {
197: my ($cmd,$server)=@_;
1.89 www 198: unless ($hostname{$server}) {
199: &logthis("<font color=blue>WARNING:".
200: " Critical message to unknown server ($server)</font>");
201: return 'no_such_host';
202: }
1.1 albertel 203: my $answer=reply($cmd,$server);
204: if ($answer eq 'con_lost') {
205: my $pingreply=reply('ping',$server);
206: &reconlonc("$perlvar{'lonSockDir'}/$server");
207: my $pongreply=reply('pong',$server);
208: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
209: $answer=reply($cmd,$server);
210: if ($answer eq 'con_lost') {
211: my $now=time;
212: my $middlename=$cmd;
1.5 www 213: $middlename=substr($middlename,0,16);
1.1 albertel 214: $middlename=~s/\W//g;
215: my $dfilename=
216: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
217: {
218: my $dfh;
219: if ($dfh=Apache::File->new(">$dfilename")) {
1.7 www 220: print $dfh "$cmd\n";
1.1 albertel 221: }
222: }
223: sleep 2;
224: my $wcmd='';
225: {
226: my $dfh;
227: if ($dfh=Apache::File->new("$dfilename")) {
228: $wcmd=<$dfh>;
229: }
230: }
231: chomp($wcmd);
1.7 www 232: if ($wcmd eq $cmd) {
1.12 www 233: &logthis("<font color=blue>WARNING: ".
234: "Connection buffer $dfilename: $cmd</font>");
1.1 albertel 235: &logperm("D:$server:$cmd");
236: return 'con_delayed';
237: } else {
1.12 www 238: &logthis("<font color=red>CRITICAL:"
239: ." Critical connection failed: $server $cmd</font>");
1.1 albertel 240: &logperm("F:$server:$cmd");
241: return 'con_failed';
242: }
243: }
244: }
245: return $answer;
246: }
247:
1.5 www 248: # ---------------------------------------------------------- Append Environment
249:
250: sub appenv {
1.6 www 251: my %newenv=@_;
1.191 harris41 252: foreach (keys %newenv) {
1.35 www 253: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
254: &logthis("<font color=blue>WARNING: ".
1.151 www 255: "Attempt to modify environment ".$_." to ".$newenv{$_}
256: .'</font>');
1.35 www 257: delete($newenv{$_});
258: } else {
259: $ENV{$_}=$newenv{$_};
260: }
1.191 harris41 261: }
1.95 www 262:
263: my $lockfh;
264: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
1.97 www 265: return 'error: '.$!;
1.95 www 266: }
267: unless (flock($lockfh,LOCK_EX)) {
268: &logthis("<font color=blue>WARNING: ".
269: 'Could not obtain exclusive lock in appenv: '.$!);
270: $lockfh->close();
271: return 'error: '.$!;
272: }
273:
1.6 www 274: my @oldenv;
275: {
276: my $fh;
277: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
1.97 www 278: return 'error: '.$!;
1.6 www 279: }
280: @oldenv=<$fh>;
1.89 www 281: $fh->close();
1.6 www 282: }
283: for (my $i=0; $i<=$#oldenv; $i++) {
284: chomp($oldenv[$i]);
1.9 www 285: if ($oldenv[$i] ne '') {
286: my ($name,$value)=split(/=/,$oldenv[$i]);
1.24 www 287: unless (defined($newenv{$name})) {
288: $newenv{$name}=$value;
289: }
1.9 www 290: }
1.6 www 291: }
292: {
293: my $fh;
294: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
295: return 'error';
296: }
297: my $newname;
1.93 www 298: foreach $newname (keys %newenv) {
1.6 www 299: print $fh "$newname=$newenv{$newname}\n";
300: }
1.86 albertel 301: $fh->close();
1.56 www 302: }
1.95 www 303:
304: $lockfh->close();
1.56 www 305: return 'ok';
306: }
307: # ----------------------------------------------------- Delete from Environment
308:
309: sub delenv {
310: my $delthis=shift;
311: my %newenv=();
312: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
313: &logthis("<font color=blue>WARNING: ".
314: "Attempt to delete from environment ".$delthis);
315: return 'error';
316: }
317: my @oldenv;
318: {
319: my $fh;
320: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
321: return 'error';
322: }
1.89 www 323: unless (flock($fh,LOCK_SH)) {
324: &logthis("<font color=blue>WARNING: ".
325: 'Could not obtain shared lock in delenv: '.$!);
326: $fh->close();
327: return 'error: '.$!;
328: }
1.56 www 329: @oldenv=<$fh>;
1.89 www 330: $fh->close();
1.56 www 331: }
332: {
333: my $fh;
334: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
335: return 'error';
336: }
1.89 www 337: unless (flock($fh,LOCK_EX)) {
338: &logthis("<font color=blue>WARNING: ".
339: 'Could not obtain exclusive lock in delenv: '.$!);
340: $fh->close();
341: return 'error: '.$!;
342: }
1.191 harris41 343: foreach (@oldenv) {
1.56 www 344: unless ($_=~/^$delthis/) { print $fh $_; }
1.191 harris41 345: }
1.87 www 346: $fh->close();
1.5 www 347: }
348: return 'ok';
349: }
1.1 albertel 350:
351: # ------------------------------ Find server with least workload from spare.tab
1.11 www 352:
1.1 albertel 353: sub spareserver {
354: my $tryserver;
355: my $spareserver='';
356: my $lowestserver=100;
357: foreach $tryserver (keys %spareid) {
358: my $answer=reply('load',$tryserver);
359: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
360: $spareserver="http://$hostname{$tryserver}";
361: $lowestserver=$answer;
362: }
363: }
364: return $spareserver;
1.202 matthew 365: }
366:
367: # --------------------------------------------- Try to change a user's password
368:
369: sub changepass {
370: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
371: $currentpass = &escape($currentpass);
372: $newpass = &escape($newpass);
373: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
374: $server);
375: if (! $answer) {
376: &logthis("No reply on password change request to $server ".
377: "by $uname in domain $udom.");
378: } elsif ($answer =~ "^ok") {
379: &logthis("$uname in $udom successfully changed their password ".
380: "on $server.");
381: } elsif ($answer =~ "^pwchange_failure") {
382: &logthis("$uname in $udom was unable to change their password ".
383: "on $server. The action was blocked by either lcpasswd ".
384: "or pwchange");
385: } elsif ($answer =~ "^non_authorized") {
386: &logthis("$uname in $udom did not get their password correct when ".
387: "attempting to change it on $server.");
388: } elsif ($answer =~ "^auth_mode_error") {
389: &logthis("$uname in $udom attempted to change their password despite ".
390: "not being locally or internally authenticated on $server.");
391: } elsif ($answer =~ "^unknown_user") {
392: &logthis("$uname in $udom attempted to change their password ".
393: "on $server but were unable to because $server is not ".
394: "their home server.");
395: } elsif ($answer =~ "^refused") {
396: &logthis("$server refused to change $uname in $udom password because ".
397: "it was sent an unencrypted request to change the password.");
398: }
399: return $answer;
1.1 albertel 400: }
401:
1.169 harris41 402: # ----------------------- Try to determine user's current authentication scheme
403:
404: sub queryauthenticate {
405: my ($uname,$udom)=@_;
406: if (($perlvar{'lonRole'} eq 'library') &&
407: ($udom eq $perlvar{'lonDefDomain'})) {
408: my $answer=reply("encrypt:currentauth:$udom:$uname",
409: $perlvar{'lonHostID'});
410: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
411: if (length($answer)) {
412: return $answer;
413: }
414: else {
415: &logthis("User $uname at $udom lacks an authentication mechanism");
416: return 'no_host';
417: }
418: }
419: }
420:
421: my $tryserver;
422: foreach $tryserver (keys %libserv) {
423: if ($hostdom{$tryserver} eq $udom) {
424: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
425: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
426: if (length($answer)) {
427: return $answer;
428: }
429: else {
430: &logthis("User $uname at $udom lacks an authentication mechanism");
431: return 'no_host';
432: }
433: }
434: }
435: }
436: &logthis("User $uname at $udom lacks an authentication mechanism");
437: return 'no_host';
438: }
439:
1.1 albertel 440: # --------- Try to authenticate user from domain's lib servers (first this one)
1.11 www 441:
1.1 albertel 442: sub authenticate {
443: my ($uname,$upass,$udom)=@_;
1.12 www 444: $upass=escape($upass);
1.199 www 445: $uname=~s/\W//g;
1.1 albertel 446: if (($perlvar{'lonRole'} eq 'library') &&
447: ($udom eq $perlvar{'lonDefDomain'})) {
1.3 www 448: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
1.2 www 449: if ($answer =~ /authorized/) {
1.9 www 450: if ($answer eq 'authorized') {
451: &logthis("User $uname at $udom authorized by local server");
452: return $perlvar{'lonHostID'};
453: }
454: if ($answer eq 'non_authorized') {
455: &logthis("User $uname at $udom rejected by local server");
456: return 'no_host';
457: }
1.2 www 458: }
1.1 albertel 459: }
460:
461: my $tryserver;
462: foreach $tryserver (keys %libserv) {
463: if ($hostdom{$tryserver} eq $udom) {
1.10 www 464: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
1.1 albertel 465: if ($answer =~ /authorized/) {
1.9 www 466: if ($answer eq 'authorized') {
467: &logthis("User $uname at $udom authorized by $tryserver");
468: return $tryserver;
469: }
470: if ($answer eq 'non_authorized') {
471: &logthis("User $uname at $udom rejected by $tryserver");
472: return 'no_host';
473: }
1.1 albertel 474: }
475: }
1.9 www 476: }
477: &logthis("User $uname at $udom could not be authenticated");
1.1 albertel 478: return 'no_host';
479: }
480:
481: # ---------------------- Find the homebase for a user from domain's lib servers
1.11 www 482:
1.1 albertel 483: sub homeserver {
1.230 stredwic 484: my ($uname,$udom,$ignoreBadCache)=@_;
1.1 albertel 485: my $index="$uname:$udom";
1.221 matthew 486: if ($homecache{$index}) {
487: return "$homecache{$index}";
488: }
1.1 albertel 489: my $tryserver;
490: foreach $tryserver (keys %libserv) {
1.230 stredwic 491: next if ($ignoreBadCache ne 'true' &&
1.231 stredwic 492: exists($badServerCache{$tryserver}));
1.1 albertel 493: if ($hostdom{$tryserver} eq $udom) {
494: my $answer=reply("home:$udom:$uname",$tryserver);
495: if ($answer eq 'found') {
1.221 matthew 496: $homecache{$index}=$tryserver;
1.1 albertel 497: return $tryserver;
1.231 stredwic 498: } elsif ($answer eq 'no_host') {
499: $badServerCache{$tryserver}=1;
1.221 matthew 500: }
1.1 albertel 501: }
502: }
503: return 'no_host';
1.70 www 504: }
505:
506: # ------------------------------------- Find the usernames behind a list of IDs
507:
508: sub idget {
509: my ($udom,@ids)=@_;
510: my %returnhash=();
511:
512: my $tryserver;
513: foreach $tryserver (keys %libserv) {
514: if ($hostdom{$tryserver} eq $udom) {
515: my $idlist=join('&',@ids);
516: $idlist=~tr/A-Z/a-z/;
517: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
518: my @answer=();
1.76 www 519: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
1.70 www 520: @answer=split(/\&/,$reply);
521: } ;
522: my $i;
523: for ($i=0;$i<=$#ids;$i++) {
524: if ($answer[$i]) {
525: $returnhash{$ids[$i]}=$answer[$i];
526: }
527: }
528: }
529: }
530: return %returnhash;
531: }
532:
533: # ------------------------------------- Find the IDs behind a list of usernames
534:
535: sub idrget {
536: my ($udom,@unames)=@_;
537: my %returnhash=();
1.191 harris41 538: foreach (@unames) {
1.70 www 539: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
1.191 harris41 540: }
1.70 www 541: return %returnhash;
542: }
543:
544: # ------------------------------- Store away a list of names and associated IDs
545:
546: sub idput {
547: my ($udom,%ids)=@_;
548: my %servers=();
1.191 harris41 549: foreach (keys %ids) {
1.70 www 550: my $uhom=&homeserver($_,$udom);
551: if ($uhom ne 'no_host') {
552: my $id=&escape($ids{$_});
553: $id=~tr/A-Z/a-z/;
554: my $unam=&escape($_);
555: if ($servers{$uhom}) {
556: $servers{$uhom}.='&'.$id.'='.$unam;
557: } else {
558: $servers{$uhom}=$id.'='.$unam;
559: }
560: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
561: }
1.191 harris41 562: }
563: foreach (keys %servers) {
1.70 www 564: &critical('idput:'.$udom.':'.$servers{$_},$_);
1.191 harris41 565: }
1.70 www 566: }
567:
568: # ------------------------------------- Find the section of student in a course
569:
570: sub usection {
571: my ($udom,$unam,$courseid)=@_;
572: $courseid=~s/\_/\//g;
573: $courseid=~s/^(\w)/\/$1/;
1.191 harris41 574: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
575: &homeserver($unam,$udom)))) {
1.70 www 576: my ($key,$value)=split(/\=/,$_);
577: $key=&unescape($key);
578: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
579: my $section=$1;
580: if ($key eq $courseid.'_st') { $section=''; }
581: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
582: my $now=time;
583: my $notactive=0;
584: if ($start) {
585: if ($now<$start) { $notactive=1; }
586: }
587: if ($end) {
588: if ($now>$end) { $notactive=1; }
589: }
590: unless ($notactive) { return $section; }
591: }
1.191 harris41 592: }
1.70 www 593: return '-1';
594: }
595:
596: # ------------------------------------- Read an entry from a user's environment
597:
598: sub userenvironment {
599: my ($udom,$unam,@what)=@_;
600: my %returnhash=();
601: my @answer=split(/\&/,
602: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
603: &homeserver($unam,$udom)));
604: my $i;
605: for ($i=0;$i<=$#what;$i++) {
606: $returnhash{$what[$i]}=&unescape($answer[$i]);
607: }
608: return %returnhash;
1.1 albertel 609: }
610:
611: # ----------------------------- Subscribe to a resource, return URL if possible
1.11 www 612:
1.1 albertel 613: sub subscribe {
614: my $fname=shift;
615: my $author=$fname;
616: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
617: my ($udom,$uname)=split(/\//,$author);
618: my $home=homeserver($uname,$udom);
619: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
620: return 'not_found';
621: }
622: my $answer=reply("sub:$fname",$home);
1.64 www 623: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
624: $answer.=' by '.$home;
625: }
1.1 albertel 626: return $answer;
627: }
628:
1.8 www 629: # -------------------------------------------------------------- Replicate file
630:
631: sub repcopy {
632: my $filename=shift;
1.23 www 633: $filename=~s/\/+/\//g;
1.214 www 634: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
1.8 www 635: my $transname="$filename.in.transfer";
1.17 www 636: if ((-e $filename) || (-e $transname)) { return OK; }
1.8 www 637: my $remoteurl=subscribe($filename);
1.64 www 638: if ($remoteurl =~ /^con_lost by/) {
639: &logthis("Subscribe returned $remoteurl: $filename");
1.8 www 640: return HTTP_SERVICE_UNAVAILABLE;
641: } elsif ($remoteurl eq 'not_found') {
642: &logthis("Subscribe returned not_found: $filename");
643: return HTTP_NOT_FOUND;
1.64 www 644: } elsif ($remoteurl =~ /^rejected by/) {
645: &logthis("Subscribe returned $remoteurl: $filename");
1.8 www 646: return FORBIDDEN;
1.20 www 647: } elsif ($remoteurl eq 'directory') {
648: return OK;
1.8 www 649: } else {
650: my @parts=split(/\//,$filename);
651: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
652: if ($path ne "$perlvar{'lonDocRoot'}/res") {
653: &logthis("Malconfiguration for replication: $filename");
654: return HTTP_BAD_REQUEST;
655: }
656: my $count;
657: for ($count=5;$count<$#parts;$count++) {
658: $path.="/$parts[$count]";
659: if ((-e $path)!=1) {
660: mkdir($path,0777);
661: }
662: }
663: my $ua=new LWP::UserAgent;
664: my $request=new HTTP::Request('GET',"$remoteurl");
665: my $response=$ua->request($request,$transname);
666: if ($response->is_error()) {
667: unlink($transname);
668: my $message=$response->status_line;
1.12 www 669: &logthis("<font color=blue>WARNING:"
670: ." LWP get: $message: $filename</font>");
1.8 www 671: return HTTP_SERVICE_UNAVAILABLE;
672: } else {
1.16 www 673: if ($remoteurl!~/\.meta$/) {
674: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
675: my $mresponse=$ua->request($mrequest,$filename.'.meta');
676: if ($mresponse->is_error()) {
677: unlink($filename.'.meta');
678: &logthis(
679: "<font color=yellow>INFO: No metadata: $filename</font>");
680: }
681: }
1.8 www 682: rename($transname,$filename);
683: return OK;
684: }
685: }
686: }
687:
1.15 www 688: # --------------------------------------------------------- Server Side Include
689:
690: sub ssi {
691:
1.23 www 692: my ($fn,%form)=@_;
1.15 www 693:
694: my $ua=new LWP::UserAgent;
1.23 www 695:
696: my $request;
697:
698: if (%form) {
699: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1.201 albertel 700: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1.23 www 701: } else {
702: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
703: }
704:
1.15 www 705: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
706: my $response=$ua->request($request);
707:
708: return $response->content;
709: }
710:
1.14 www 711: # ------------------------------------------------------------------------- Log
712:
713: sub log {
714: my ($dom,$nam,$hom,$what)=@_;
1.47 www 715: return critical("log:$dom:$nam:$what",$hom);
1.157 www 716: }
717:
718: # ------------------------------------------------------------------ Course Log
719:
720: sub flushcourselogs {
721: &logthis('Flushing course log buffers');
1.191 harris41 722: foreach (keys %courselogs) {
1.157 www 723: my $crsid=$_;
1.188 www 724: if (&reply('log:'.$coursedombuf{$crsid}.':'.
725: &escape($courselogs{$crsid}),
726: $coursehombuf{$crsid}) eq 'ok') {
1.157 www 727: delete $courselogs{$crsid};
728: } else {
729: &logthis('Failed to flush log buffer for '.$crsid);
730: if (length($courselogs{$crsid})>40000) {
731: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
732: " exceeded maximum size, deleting.</font>");
733: delete $courselogs{$crsid};
734: }
735: }
1.191 harris41 736: }
1.185 www 737: &logthis('Flushing access logs');
1.191 harris41 738: foreach (keys %accesshash) {
1.185 www 739: my $entry=$_;
740: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
741: my %temphash=($entry => $accesshash{$entry});
742: if (&Apache::lonnet::put('resevaldata',\%temphash,$1,$2) eq 'ok') {
743: delete $accesshash{$entry};
744: }
1.191 harris41 745: }
1.186 www 746: $dumpcount++;
1.157 www 747: }
748:
749: sub courselog {
750: my $what=shift;
1.158 www 751: $what=time.':'.$what;
1.157 www 752: unless ($ENV{'request.course.id'}) { return ''; }
1.188 www 753: $coursedombuf{$ENV{'request.course.id'}}=
754: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
755: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
756: $coursehombuf{$ENV{'request.course.id'}}=
757: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1.157 www 758: if (defined $courselogs{$ENV{'request.course.id'}}) {
759: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
760: } else {
761: $courselogs{$ENV{'request.course.id'}}.=$what;
762: }
763: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
764: &flushcourselogs();
765: }
1.158 www 766: }
767:
768: sub courseacclog {
769: my $fnsymb=shift;
770: unless ($ENV{'request.course.id'}) { return ''; }
771: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1.192 www 772: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
1.187 www 773: $what.=':POST';
1.191 harris41 774: foreach (keys %ENV) {
1.158 www 775: if ($_=~/^form\.(.*)/) {
776: $what.=':'.$1.'='.$ENV{$_};
777: }
1.191 harris41 778: }
1.158 www 779: }
780: &courselog($what);
1.149 www 781: }
782:
1.185 www 783: sub countacc {
784: my $url=&declutter(shift);
785: unless ($ENV{'request.course.id'}) { return ''; }
786: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1.186 www 787: my $key=$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1.185 www 788: if (defined($accesshash{$key})) {
789: $accesshash{$key}++;
790: } else {
791: $accesshash{$key}=1;
792: }
793: }
794:
1.149 www 795: # ----------------------------------------------------------- Check out an item
796:
797: sub checkout {
798: my ($symb,$tuname,$tudom,$tcrsid)=@_;
799: my $now=time;
800: my $lonhost=$perlvar{'lonHostID'};
801: my $infostr=&escape(
1.234 www 802: 'CHECKOUTTOKEN&'.
1.149 www 803: $tuname.'&'.
804: $tudom.'&'.
805: $tcrsid.'&'.
806: $symb.'&'.
807: $now.'&'.$ENV{'REMOTE_ADDR'});
808: my $token=&reply('tmpput:'.$infostr,$lonhost);
1.151 www 809: if ($token=~/^error\:/) {
810: &logthis("<font color=blue>WARNING: ".
811: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
812: "</font>");
813: return '';
814: }
815:
1.149 www 816: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
817: $token=~tr/a-z/A-Z/;
818:
1.153 www 819: my %infohash=('resource.0.outtoken' => $token,
820: 'resource.0.checkouttime' => $now,
821: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1.149 www 822:
823: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
824: return '';
1.151 www 825: } else {
826: &logthis("<font color=blue>WARNING: ".
827: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
828: "</font>");
1.149 www 829: }
830:
831: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
832: &escape('Checkout '.$infostr.' - '.
833: $token)) ne 'ok') {
834: return '';
1.151 www 835: } else {
836: &logthis("<font color=blue>WARNING: ".
837: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
838: "</font>");
1.149 www 839: }
1.151 www 840: return $token;
1.149 www 841: }
842:
843: # ------------------------------------------------------------ Check in an item
844:
845: sub checkin {
846: my $token=shift;
1.150 www 847: my $now=time;
848: my ($ta,$tb,$lonhost)=split(/\*/,$token);
849: $lonhost=~tr/A-Z/a-z/;
850: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
851: $dtoken=~s/\W/\_/g;
1.234 www 852: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1.150 www 853: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
854:
1.154 www 855: unless (($tuname) && ($tudom)) {
856: &logthis('Check in '.$token.' ('.$dtoken.') failed');
857: return '';
858: }
859:
860: unless (&allowed('mgr',$tcrsid)) {
861: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
862: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
863: return '';
864: }
865:
1.153 www 866: my %infohash=('resource.0.intoken' => $token,
867: 'resource.0.checkintime' => $now,
868: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1.150 www 869:
870: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
871: return '';
872: }
873:
874: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
875: &escape('Checkin - '.$token)) ne 'ok') {
876: return '';
877: }
878:
879: return ($symb,$tuname,$tudom,$tcrsid);
1.110 www 880: }
881:
882: # --------------------------------------------- Set Expire Date for Spreadsheet
883:
884: sub expirespread {
885: my ($uname,$udom,$stype,$usymb)=@_;
886: my $cid=$ENV{'request.course.id'};
887: if ($cid) {
888: my $now=time;
889: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
890: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
891: $ENV{'course.'.$cid.'.num'}.
892: ':nohist_expirationdates:'.
893: &escape($key).'='.$now,
894: $ENV{'course.'.$cid.'.home'})
895: }
896: return 'ok';
1.14 www 897: }
898:
1.109 www 899: # ----------------------------------------------------- Devalidate Spreadsheets
900:
901: sub devalidate {
902: my $symb=shift;
903: my $cid=$ENV{'request.course.id'};
904: if ($cid) {
905: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
906: my $status=
1.133 albertel 907: &del('nohist_calculatedsheet',
908: [$key.'studentcalc'],
909: $ENV{'course.'.$cid.'.domain'},
910: $ENV{'course.'.$cid.'.num'})
911: .' '.
912: &del('nohist_calculatedsheets_'.$cid,
913: [$key.'assesscalc:'.$symb]);
1.109 www 914: unless ($status eq 'ok ok') {
915: &logthis('Could not devalidate spreadsheet '.
916: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
917: $symb.': '.$status);
1.133 albertel 918: }
1.109 www 919: }
920: }
921:
1.204 albertel 922: sub arrayref2str {
923: my ($arrayref) = @_;
924: my $result='_ARRAY_REF__';
925: foreach my $elem (@$arrayref) {
926: if (ref($elem) eq 'ARRAY') {
927: $result.=&escape(&arrayref2str($elem)).'&';
928: } elsif (ref($elem) eq 'HASH') {
929: $result.=&escape(&hashref2str($elem)).'&';
930: } elsif (ref($elem)) {
931: &logthis("Got a ref of ".(ref($elem))." skipping.");
932: } else {
933: $result.=&escape($elem).'&';
934: }
935: }
936: $result=~s/\&$//;
937: return $result;
938: }
939:
1.168 albertel 940: sub hash2str {
1.204 albertel 941: my (%hash) = @_;
942: my $result=&hashref2str(\%hash);
943: $result=~s/^_HASH_REF__//;
944: return $result;
945: }
946:
947: sub hashref2str {
948: my ($hashref)=@_;
949: my $result='_HASH_REF__';
950: foreach (keys(%$hashref)) {
951: if (ref($_) eq 'ARRAY') {
952: $result.=&escape(&arrayref2str($_)).'=';
953: } elsif (ref($_) eq 'HASH') {
954: $result.=&escape(&hashref2str($_)).'=';
955: } elsif (ref($_)) {
956: &logthis("Got a ref of ".(ref($_))." skipping.");
957: } else {
958: $result.=&escape($_).'=';
959: }
960:
961: if (ref($$hashref{$_}) eq 'ARRAY') {
962: $result.=&escape(&arrayref2str($$hashref{$_})).'&';
963: } elsif (ref($$hashref{$_}) eq 'HASH') {
964: $result.=&escape(&hashref2str($$hashref{$_})).'&';
965: } elsif (ref($$hashref{$_})) {
966: &logthis("Got a ref of ".(ref($$hashref{$_}))." skipping.");
967: } else {
968: $result.=&escape($$hashref{$_}).'&';
969: }
970: }
1.168 albertel 971: $result=~s/\&$//;
972: return $result;
973: }
974:
975: sub str2hash {
976: my ($string) = @_;
977: my %returnhash;
1.191 harris41 978: foreach (split(/\&/,$string)) {
1.168 albertel 979: my ($name,$value)=split(/\=/,$_);
1.204 albertel 980: $name=&unescape($name);
981: $value=&unescape($value);
982: if ($value =~ /^_HASH_REF__/) {
983: $value =~ s/^_HASH_REF__//;
984: my %hash=&str2hash($value);
985: $value=\%hash;
986: } elsif ($value =~ /^_ARRAY_REF__/) {
987: $value =~ s/^_ARRAY_REF__//;
988: my @array=&str2array($value);
989: $value=\@array;
990: }
991: $returnhash{$name}=$value;
992: }
993: return (%returnhash);
994: }
995:
996: sub str2array {
997: my ($string) = @_;
998: my @returnarray;
999: foreach my $value (split(/\&/,$string)) {
1000: $value=&unescape($value);
1001: if ($value =~ /^_HASH_REF__/) {
1002: $value =~ s/^_HASH_REF__//;
1003: my %hash=&str2hash($value);
1004: $value=\%hash;
1005: } elsif ($value =~ /^_ARRAY_REF__/) {
1006: $value =~ s/^_ARRAY_REF__//;
1007: my @array=&str2array($value);
1008: $value=\@array;
1009: }
1010: push(@returnarray,$value);
1.191 harris41 1011: }
1.204 albertel 1012: return (@returnarray);
1.168 albertel 1013: }
1014:
1.167 albertel 1015: # -------------------------------------------------------------------Temp Store
1016:
1.168 albertel 1017: sub tmpreset {
1018: my ($symb,$namespace,$domain,$stuname) = @_;
1019: if (!$symb) {
1020: $symb=&symbread();
1021: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1022: }
1023: $symb=escape($symb);
1024:
1025: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1026: $namespace=~s/\//\_/g;
1027: $namespace=~s/\W//g;
1028:
1029: #FIXME needs to do something for /pub resources
1030: if (!$domain) { $domain=$ENV{'user.domain'}; }
1031: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1032: my $path=$perlvar{'lonDaemons'}.'/tmp';
1033: my %hash;
1034: if (tie(%hash,'GDBM_File',
1035: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1036: &GDBM_WRCREAT,0640)) {
1037: foreach my $key (keys %hash) {
1.180 albertel 1038: if ($key=~ /:$symb/) {
1.168 albertel 1039: delete($hash{$key});
1040: }
1041: }
1042: }
1043: }
1044:
1.167 albertel 1045: sub tmpstore {
1.168 albertel 1046: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1047:
1048: if (!$symb) {
1049: $symb=&symbread();
1050: if (!$symb) { $symb= $ENV{'request.url'}; }
1051: }
1052: $symb=escape($symb);
1053:
1054: if (!$namespace) {
1055: # I don't think we would ever want to store this for a course.
1056: # it seems this will only be used if we don't have a course.
1057: #$namespace=$ENV{'request.course.id'};
1058: #if (!$namespace) {
1059: $namespace=$ENV{'request.state'};
1060: #}
1061: }
1062: $namespace=~s/\//\_/g;
1063: $namespace=~s/\W//g;
1064: #FIXME needs to do something for /pub resources
1065: if (!$domain) { $domain=$ENV{'user.domain'}; }
1066: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1067: my $now=time;
1068: my %hash;
1069: my $path=$perlvar{'lonDaemons'}.'/tmp';
1070: if (tie(%hash,'GDBM_File',
1071: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1072: &GDBM_WRCREAT,0640)) {
1073: $hash{"version:$symb"}++;
1074: my $version=$hash{"version:$symb"};
1075: my $allkeys='';
1076: foreach my $key (keys(%$storehash)) {
1077: $allkeys.=$key.':';
1078: $hash{"$version:$symb:$key"}=$$storehash{$key};
1079: }
1080: $hash{"$version:$symb:timestamp"}=$now;
1081: $allkeys.='timestamp';
1082: $hash{"$version:keys:$symb"}=$allkeys;
1083: if (untie(%hash)) {
1084: return 'ok';
1085: } else {
1086: return "error:$!";
1087: }
1088: } else {
1089: return "error:$!";
1090: }
1091: }
1.167 albertel 1092:
1.168 albertel 1093: # -----------------------------------------------------------------Temp Restore
1.167 albertel 1094:
1.168 albertel 1095: sub tmprestore {
1096: my ($symb,$namespace,$domain,$stuname) = @_;
1.167 albertel 1097:
1.168 albertel 1098: if (!$symb) {
1099: $symb=&symbread();
1100: if (!$symb) { $symb= $ENV{'request.url'}; }
1101: }
1102: $symb=escape($symb);
1103:
1104: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1105: #FIXME needs to do something for /pub resources
1106: if (!$domain) { $domain=$ENV{'user.domain'}; }
1107: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1108:
1109: my %returnhash;
1110: $namespace=~s/\//\_/g;
1111: $namespace=~s/\W//g;
1112: my %hash;
1113: my $path=$perlvar{'lonDaemons'}.'/tmp';
1114: if (tie(%hash,'GDBM_File',
1115: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1116: &GDBM_READER,0640)) {
1117: my $version=$hash{"version:$symb"};
1118: $returnhash{'version'}=$version;
1119: my $scope;
1120: for ($scope=1;$scope<=$version;$scope++) {
1121: my $vkeys=$hash{"$scope:keys:$symb"};
1122: my @keys=split(/:/,$vkeys);
1123: my $key;
1124: $returnhash{"$scope:keys"}=$vkeys;
1125: foreach $key (@keys) {
1126: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1127: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1.167 albertel 1128: }
1129: }
1.168 albertel 1130: if (!(untie(%hash))) {
1131: return "error:$!";
1132: }
1133: } else {
1134: return "error:$!";
1135: }
1136: return %returnhash;
1.167 albertel 1137: }
1138:
1.9 www 1139: # ----------------------------------------------------------------------- Store
1140:
1141: sub store {
1.124 www 1142: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1143: my $home='';
1144:
1.168 albertel 1145: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 1146:
1.213 www 1147: $symb=&symbclean($symb);
1.122 albertel 1148: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1.109 www 1149:
1150: &devalidate($symb);
1151:
1152: $symb=escape($symb);
1.187 www 1153: if (!$namespace) {
1154: unless ($namespace=$ENV{'request.course.id'}) {
1155: return '';
1156: }
1157: }
1.122 albertel 1158: if (!$domain) { $domain=$ENV{'user.domain'}; }
1159: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1160: if (!$home) { $home=$ENV{'user.home'}; }
1.12 www 1161: my $namevalue='';
1.191 harris41 1162: foreach (keys %$storehash) {
1.122 albertel 1163: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 1164: }
1.12 www 1165: $namevalue=~s/\&$//;
1.187 www 1166: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1.124 www 1167: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1.9 www 1168: }
1169:
1.47 www 1170: # -------------------------------------------------------------- Critical Store
1171:
1172: sub cstore {
1.124 www 1173: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1174: my $home='';
1175:
1.168 albertel 1176: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 1177:
1.213 www 1178: $symb=&symbclean($symb);
1.122 albertel 1179: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1.109 www 1180:
1181: &devalidate($symb);
1182:
1183: $symb=escape($symb);
1.187 www 1184: if (!$namespace) {
1185: unless ($namespace=$ENV{'request.course.id'}) {
1186: return '';
1187: }
1188: }
1.122 albertel 1189: if (!$domain) { $domain=$ENV{'user.domain'}; }
1190: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1191: if (!$home) { $home=$ENV{'user.home'}; }
1192:
1.47 www 1193: my $namevalue='';
1.191 harris41 1194: foreach (keys %$storehash) {
1.122 albertel 1195: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 1196: }
1.47 www 1197: $namevalue=~s/\&$//;
1.187 www 1198: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1.188 www 1199: return critical
1200: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1.47 www 1201: }
1202:
1.9 www 1203: # --------------------------------------------------------------------- Restore
1204:
1205: sub restore {
1.124 www 1206: my ($symb,$namespace,$domain,$stuname) = @_;
1207: my $home='';
1208:
1.168 albertel 1209: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 1210:
1.122 albertel 1211: if (!$symb) {
1212: unless ($symb=escape(&symbread())) { return ''; }
1213: } else {
1.213 www 1214: $symb=&escape(&symbclean($symb));
1.122 albertel 1215: }
1.188 www 1216: if (!$namespace) {
1217: unless ($namespace=$ENV{'request.course.id'}) {
1218: return '';
1219: }
1220: }
1.122 albertel 1221: if (!$domain) { $domain=$ENV{'user.domain'}; }
1222: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1223: if (!$home) { $home=$ENV{'user.home'}; }
1224: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1225:
1.12 www 1226: my %returnhash=();
1.191 harris41 1227: foreach (split(/\&/,$answer)) {
1.12 www 1228: my ($name,$value)=split(/\=/,$_);
1229: $returnhash{&unescape($name)}=&unescape($value);
1.191 harris41 1230: }
1.75 www 1231: my $version;
1232: for ($version=1;$version<=$returnhash{'version'};$version++) {
1.191 harris41 1233: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1.75 www 1234: $returnhash{$_}=$returnhash{$version.':'.$_};
1.191 harris41 1235: }
1.75 www 1236: }
1.13 www 1237: return %returnhash;
1.34 www 1238: }
1239:
1240: # ---------------------------------------------------------- Course Description
1241:
1242: sub coursedescription {
1243: my $courseid=shift;
1244: $courseid=~s/^\///;
1.49 www 1245: $courseid=~s/\_/\//g;
1.34 www 1246: my ($cdomain,$cnum)=split(/\//,$courseid);
1.129 albertel 1247: my $chome=&homeserver($cnum,$cdomain);
1.34 www 1248: if ($chome ne 'no_host') {
1.129 albertel 1249: my %returnhash=&dump('environment',$cdomain,$cnum);
1250: if (!exists($returnhash{'con_lost'})) {
1.96 www 1251: my $normalid=$cdomain.'_'.$cnum;
1.53 www 1252: my %envhash=();
1.129 albertel 1253: $returnhash{'home'}= $chome;
1254: $returnhash{'domain'} = $cdomain;
1255: $returnhash{'num'} = $cnum;
1.130 albertel 1256: while (my ($name,$value) = each %returnhash) {
1.53 www 1257: $envhash{'course.'.$normalid.'.'.$name}=$value;
1.129 albertel 1258: }
1.34 www 1259: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1260: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1.38 www 1261: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1.54 www 1262: $envhash{'course.'.$normalid.'.last_cache'}=time;
1.60 www 1263: $envhash{'course.'.$normalid.'.home'}=$chome;
1264: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1265: $envhash{'course.'.$normalid.'.num'}=$cnum;
1.53 www 1266: &appenv(%envhash);
1.34 www 1267: return %returnhash;
1268: }
1269: }
1270: return ();
1.9 www 1271: }
1.1 albertel 1272:
1.103 harris41 1273: # -------------------------------------------------------- Get user privileges
1.11 www 1274:
1275: sub rolesinit {
1276: my ($domain,$username,$authhost)=@_;
1277: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1.12 www 1278: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1.11 www 1279: my %allroles=();
1280: my %thesepriv=();
1281: my $now=time;
1.21 www 1282: my $userroles="user.login.time=$now\n";
1.11 www 1283: my $thesestr;
1284:
1285: if ($rolesdump ne '') {
1.191 harris41 1286: foreach (split(/&/,$rolesdump)) {
1.21 www 1287: if ($_!~/^rolesdef\&/) {
1.11 www 1288: my ($area,$role)=split(/=/,$_);
1.21 www 1289: $area=~s/\_\w\w$//;
1.11 www 1290: my ($trole,$tend,$tstart)=split(/_/,$role);
1.21 www 1291: $userroles.='user.role.'.$trole.'.'.$area.'='.
1292: $tstart.'.'.$tend."\n";
1.11 www 1293: if ($tend!=0) {
1294: if ($tend<$now) {
1295: $trole='';
1296: }
1297: }
1298: if ($tstart!=0) {
1299: if ($tstart>$now) {
1300: $trole='';
1301: }
1302: }
1303: if (($area ne '') && ($trole ne '')) {
1.50 www 1304: my $spec=$trole.'.'.$area;
1.12 www 1305: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1306: if ($trole =~ /^cr\//) {
1307: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1308: my $homsvr=homeserver($rauthor,$rdomain);
1309: if ($hostname{$homsvr} ne '') {
1310: my $roledef=
1.21 www 1311: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1.12 www 1312: $homsvr);
1313: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1314: my ($syspriv,$dompriv,$coursepriv)=
1.21 www 1315: split(/\_/,unescape($roledef));
1.50 www 1316: $allroles{'cm./'}.=':'.$syspriv;
1317: $allroles{$spec.'./'}.=':'.$syspriv;
1.12 www 1318: if ($tdomain ne '') {
1.50 www 1319: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1320: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1.12 www 1321: if ($trest ne '') {
1.50 www 1322: $allroles{'cm.'.$area}.=':'.$coursepriv;
1323: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1.12 www 1324: }
1325: }
1326: }
1.11 www 1327: }
1.12 www 1328: } else {
1.50 www 1329: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1330: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1.12 www 1331: if ($tdomain ne '') {
1.50 www 1332: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1333: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1.12 www 1334: if ($trest ne '') {
1.50 www 1335: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1336: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1.12 www 1337: }
1338: }
1.11 www 1339: }
1.12 www 1340: }
1341: }
1.191 harris41 1342: }
1.125 www 1343: my $adv=0;
1.128 www 1344: my $author=0;
1.191 harris41 1345: foreach (keys %allroles) {
1.11 www 1346: %thesepriv=();
1.146 www 1347: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1.128 www 1348: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1.191 harris41 1349: foreach (split(/:/,$allroles{$_})) {
1.11 www 1350: if ($_ ne '') {
1.103 harris41 1351: my ($privilege,$restrictions)=split(/&/,$_);
1.11 www 1352: if ($restrictions eq '') {
1.103 harris41 1353: $thesepriv{$privilege}='F';
1.11 www 1354: } else {
1.103 harris41 1355: if ($thesepriv{$privilege} ne 'F') {
1356: $thesepriv{$privilege}.=$restrictions;
1.11 www 1357: }
1358: }
1359: }
1.191 harris41 1360: }
1.11 www 1361: $thesestr='';
1.191 harris41 1362: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1.11 www 1363: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1.191 harris41 1364: }
1.128 www 1365: $userroles.='user.adv='.$adv."\n".
1366: 'user.author='.$author."\n";
1.126 www 1367: $ENV{'user.adv'}=$adv;
1.11 www 1368: }
1369: return $userroles;
1370: }
1371:
1.12 www 1372: # --------------------------------------------------------------- get interface
1373:
1374: sub get {
1.131 albertel 1375: my ($namespace,$storearr,$udomain,$uname)=@_;
1.12 www 1376: my $items='';
1.191 harris41 1377: foreach (@$storearr) {
1.12 www 1378: $items.=escape($_).'&';
1.191 harris41 1379: }
1.12 www 1380: $items=~s/\&$//;
1.131 albertel 1381: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1382: if (!$uname) { $uname=$ENV{'user.name'}; }
1383: my $uhome=&homeserver($uname,$udomain);
1384:
1.133 albertel 1385: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1.15 www 1386: my @pairs=split(/\&/,$rep);
1387: my %returnhash=();
1.42 www 1388: my $i=0;
1.191 harris41 1389: foreach (@$storearr) {
1.42 www 1390: $returnhash{$_}=unescape($pairs[$i]);
1391: $i++;
1.191 harris41 1392: }
1.15 www 1393: return %returnhash;
1.27 www 1394: }
1395:
1396: # --------------------------------------------------------------- del interface
1397:
1398: sub del {
1.133 albertel 1399: my ($namespace,$storearr,$udomain,$uname)=@_;
1.27 www 1400: my $items='';
1.191 harris41 1401: foreach (@$storearr) {
1.27 www 1402: $items.=escape($_).'&';
1.191 harris41 1403: }
1.27 www 1404: $items=~s/\&$//;
1.133 albertel 1405: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1406: if (!$uname) { $uname=$ENV{'user.name'}; }
1407: my $uhome=&homeserver($uname,$udomain);
1408:
1409: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1.15 www 1410: }
1411:
1412: # -------------------------------------------------------------- dump interface
1413:
1414: sub dump {
1.193 www 1415: my ($namespace,$udomain,$uname,$regexp)=@_;
1.129 albertel 1416: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1417: if (!$uname) { $uname=$ENV{'user.name'}; }
1418: my $uhome=&homeserver($uname,$udomain);
1.193 www 1419: if ($regexp) {
1420: $regexp=&escape($regexp);
1421: } else {
1422: $regexp='.';
1423: }
1424: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1.12 www 1425: my @pairs=split(/\&/,$rep);
1426: my %returnhash=();
1.191 harris41 1427: foreach (@pairs) {
1.12 www 1428: my ($key,$value)=split(/=/,$_);
1.29 www 1429: $returnhash{unescape($key)}=unescape($value);
1.191 harris41 1430: }
1.12 www 1431: return %returnhash;
1432: }
1433:
1434: # --------------------------------------------------------------- put interface
1435:
1436: sub put {
1.134 albertel 1437: my ($namespace,$storehash,$udomain,$uname)=@_;
1438: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1439: if (!$uname) { $uname=$ENV{'user.name'}; }
1440: my $uhome=&homeserver($uname,$udomain);
1.12 www 1441: my $items='';
1.191 harris41 1442: foreach (keys %$storehash) {
1.134 albertel 1443: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1.191 harris41 1444: }
1.12 www 1445: $items=~s/\&$//;
1.134 albertel 1446: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1.47 www 1447: }
1448:
1449: # ------------------------------------------------------ critical put interface
1450:
1451: sub cput {
1.134 albertel 1452: my ($namespace,$storehash,$udomain,$uname)=@_;
1453: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1454: if (!$uname) { $uname=$ENV{'user.name'}; }
1455: my $uhome=&homeserver($uname,$udomain);
1.47 www 1456: my $items='';
1.191 harris41 1457: foreach (keys %$storehash) {
1.134 albertel 1458: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 1459: }
1.47 www 1460: $items=~s/\&$//;
1.134 albertel 1461: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1.12 www 1462: }
1463:
1464: # -------------------------------------------------------------- eget interface
1465:
1466: sub eget {
1.133 albertel 1467: my ($namespace,$storearr,$udomain,$uname)=@_;
1.12 www 1468: my $items='';
1.191 harris41 1469: foreach (@$storearr) {
1.12 www 1470: $items.=escape($_).'&';
1.191 harris41 1471: }
1.12 www 1472: $items=~s/\&$//;
1.133 albertel 1473: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1474: if (!$uname) { $uname=$ENV{'user.name'}; }
1475: my $uhome=&homeserver($uname,$udomain);
1476: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1.12 www 1477: my @pairs=split(/\&/,$rep);
1478: my %returnhash=();
1.42 www 1479: my $i=0;
1.191 harris41 1480: foreach (@$storearr) {
1.42 www 1481: $returnhash{$_}=unescape($pairs[$i]);
1482: $i++;
1.191 harris41 1483: }
1.12 www 1484: return %returnhash;
1485: }
1486:
1.103 harris41 1487: # ------------------------------------------------- Check for a user privilege
1.12 www 1488:
1489: sub allowed {
1490: my ($priv,$uri)=@_;
1.152 www 1491:
1492: my $orguri=$uri;
1.52 www 1493: $uri=&declutter($uri);
1.29 www 1494:
1.54 www 1495: # Free bre access to adm and meta resources
1.29 www 1496:
1.54 www 1497: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1.14 www 1498: return 'F';
1.159 www 1499: }
1500:
1501: # Free bre to public access
1502:
1503: if ($priv eq 'bre') {
1.238 www 1504: my $copyright=&metadata($uri,'copyright');
1505: if ($copyright eq 'public') { return 'F'; }
1506: if ($copyright eq 'priv') {
1507: $uri=~/([^\/]+)\/([^\/]+)\//;
1508: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
1509: return '';
1510: }
1511: }
1512: if ($copyright eq 'domain') {
1513: $uri=~/([^\/]+)\/([^\/]+)\//;
1514: unless (($ENV{'user.domain'} eq $1) ||
1515: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
1516: return '';
1517: }
1518: }
1.14 www 1519: }
1.29 www 1520:
1.52 www 1521: my $thisallowed='';
1522: my $statecond=0;
1523: my $courseprivid='';
1524:
1525: # Course
1526:
1527: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1528: $thisallowed.=$1;
1529: }
1.29 www 1530:
1.52 www 1531: # Domain
1532:
1533: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1534: =~/$priv\&([^\:]*)/) {
1.12 www 1535: $thisallowed.=$1;
1536: }
1.52 www 1537:
1538: # Course: uri itself is a course
1.66 www 1539: my $courseuri=$uri;
1540: $courseuri=~s/\_(\d)/\/$1/;
1.83 www 1541: $courseuri=~s/^([^\/])/\/$1/;
1.81 www 1542:
1.83 www 1543: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1.52 www 1544: =~/$priv\&([^\:]*)/) {
1.12 www 1545: $thisallowed.=$1;
1546: }
1.29 www 1547:
1.52 www 1548: # Full access at system, domain or course-wide level? Exit.
1.29 www 1549:
1550: if ($thisallowed=~/F/) {
1551: return 'F';
1552: }
1553:
1.52 www 1554: # If this is generating or modifying users, exit with special codes
1.29 www 1555:
1.166 www 1556: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1.52 www 1557: return $thisallowed;
1558: }
1559: #
1.103 harris41 1560: # Gathered so far: system, domain and course wide privileges
1.52 www 1561: #
1562: # Course: See if uri or referer is an individual resource that is part of
1563: # the course
1564:
1565: if ($ENV{'request.course.id'}) {
1.232 www 1566:
1.52 www 1567: $courseprivid=$ENV{'request.course.id'};
1568: if ($ENV{'request.course.sec'}) {
1569: $courseprivid.='/'.$ENV{'request.course.sec'};
1570: }
1571: $courseprivid=~s/\_/\//;
1572: my $checkreferer=1;
1.232 www 1573: my ($match,$cond)=&is_on_map($uri);
1574: if ($match) {
1575: $statecond=$cond;
1.52 www 1576: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1577: =~/$priv\&([^\:]*)/) {
1578: $thisallowed.=$1;
1579: $checkreferer=0;
1580: }
1.29 www 1581: }
1.83 www 1582:
1.148 www 1583: if ($checkreferer) {
1.152 www 1584: my $refuri=$ENV{'httpref.'.$orguri};
1.148 www 1585: unless ($refuri) {
1.191 harris41 1586: foreach (keys %ENV) {
1.148 www 1587: if ($_=~/^httpref\..*\*/) {
1588: my $pattern=$_;
1.156 www 1589: $pattern=~s/^httpref\.\/res\///;
1.148 www 1590: $pattern=~s/\*/\[\^\/\]\+/g;
1591: $pattern=~s/\//\\\//g;
1.152 www 1592: if ($orguri=~/$pattern/) {
1.148 www 1593: $refuri=$ENV{$_};
1594: }
1595: }
1.191 harris41 1596: }
1.148 www 1597: }
1.232 www 1598:
1.148 www 1599: if ($refuri) {
1.152 www 1600: $refuri=&declutter($refuri);
1.232 www 1601: my ($match,$cond)=&is_on_map($refuri);
1602: if ($match) {
1603: my $refstatecond=$cond;
1.52 www 1604: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1605: =~/$priv\&([^\:]*)/) {
1606: $thisallowed.=$1;
1.53 www 1607: $uri=$refuri;
1608: $statecond=$refstatecond;
1.52 www 1609: }
1610: }
1.148 www 1611: }
1.29 www 1612: }
1.52 www 1613: }
1.29 www 1614:
1.52 www 1615: #
1.103 harris41 1616: # Gathered now: all privileges that could apply, and condition number
1.52 www 1617: #
1618: #
1619: # Full or no access?
1620: #
1.29 www 1621:
1.52 www 1622: if ($thisallowed=~/F/) {
1623: return 'F';
1624: }
1.29 www 1625:
1.52 www 1626: unless ($thisallowed) {
1627: return '';
1628: }
1.29 www 1629:
1.52 www 1630: # Restrictions exist, deal with them
1631: #
1632: # C:according to course preferences
1633: # R:according to resource settings
1634: # L:unless locked
1635: # X:according to user session state
1636: #
1637:
1638: # Possibly locked functionality, check all courses
1.54 www 1639: # Locks might take effect only after 10 minutes cache expiration for other
1640: # courses, and 2 minutes for current course
1.52 www 1641:
1642: my $envkey;
1643: if ($thisallowed=~/L/) {
1644: foreach $envkey (keys %ENV) {
1.54 www 1645: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1646: my $courseid=$2;
1647: my $roleid=$1.'.'.$2;
1.92 www 1648: $courseid=~s/^\///;
1.54 www 1649: my $expiretime=600;
1650: if ($ENV{'request.role'} eq $roleid) {
1651: $expiretime=120;
1652: }
1653: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1654: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1655: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1656: &coursedescription($courseid);
1657: }
1658: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1659: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1660: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1.57 www 1661: &log($ENV{'user.domain'},$ENV{'user.name'},
1.239 www 1662: $ENV{'user.home'},
1.57 www 1663: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1.52 www 1664: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1.54 www 1665: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1.52 www 1666: return '';
1667: }
1668: }
1.54 www 1669: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1670: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1671: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1.57 www 1672: &log($ENV{'user.domain'},$ENV{'user.name'},
1.239 www 1673: $ENV{'user.home'},
1.57 www 1674: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1.52 www 1675: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1.54 www 1676: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1.52 www 1677: return '';
1678: }
1679: }
1680: }
1.29 www 1681: }
1.52 www 1682: }
1683:
1684: #
1685: # Rest of the restrictions depend on selected course
1686: #
1687:
1688: unless ($ENV{'request.course.id'}) {
1689: return '1';
1690: }
1.29 www 1691:
1.52 www 1692: #
1693: # Now user is definitely in a course
1694: #
1.53 www 1695:
1696:
1697: # Course preferences
1698:
1699: if ($thisallowed=~/C/) {
1.54 www 1700: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1.237 www 1701: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
1.54 www 1702: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1.194 www 1703: =~/$rolecode/) {
1.57 www 1704: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1705: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1.237 www 1706: $ENV{'request.course.id'});
1707: return '';
1708: }
1709:
1710: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
1711: =~/$unamedom/) {
1712: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1713: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
1.54 www 1714: $ENV{'request.course.id'});
1715: return '';
1716: }
1.53 www 1717: }
1718:
1719: # Resource preferences
1720:
1721: if ($thisallowed=~/R/) {
1.54 www 1722: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1723: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1724: if (-e $filename) {
1725: my @content;
1726: {
1727: my $fh=Apache::File->new($filename);
1728: @content=<$fh>;
1729: }
1730: if (join('',@content)=~
1731: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1.57 www 1732: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1733: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1.54 www 1734: return '';
1735:
1736: }
1737: }
1.53 www 1738: }
1.30 www 1739:
1.246 www 1740: # Restricted by state or randomout?
1.30 www 1741:
1.52 www 1742: if ($thisallowed=~/X/) {
1.247 ! www 1743: if ($ENV{'acc.randomout'}) {
! 1744: my $symb=&symbread();
! 1745: if ($ENV{'acc.randomout'}=~/\&$symb\&/) { return ''; }
! 1746: }
! 1747: if (&condval($statecond)) {
1.52 www 1748: return '2';
1749: } else {
1750: return '';
1751: }
1752: }
1.30 www 1753:
1.52 www 1754: return 'F';
1.232 www 1755: }
1756:
1757: # --------------------------------------------------- Is a resource on the map?
1758:
1759: sub is_on_map {
1760: my $uri=&declutter(shift);
1761: my @uriparts=split(/\//,$uri);
1762: my $filename=$uriparts[$#uriparts];
1763: my $pathname=$uri;
1764: $pathname=~s/\/$filename$//;
1765: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1766: /\&$filename\:([\d\|]+)\&/);
1767: if ($match) {
1768: return (1,$1);
1769: } else {
1770: return (0,0);
1771: }
1.12 www 1772: }
1773:
1774: # ----------------------------------------------------------------- Define Role
1775:
1776: sub definerole {
1777: if (allowed('mcr','/')) {
1778: my ($rolename,$sysrole,$domrole,$courole)=@_;
1.191 harris41 1779: foreach (split('/',$sysrole)) {
1.21 www 1780: my ($crole,$cqual)=split(/\&/,$_);
1781: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1782: if ($pr{'cr:s'}=~/$crole\&/) {
1783: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1784: return "refused:s:$crole&$cqual";
1785: }
1786: }
1.191 harris41 1787: }
1788: foreach (split('/',$domrole)) {
1.21 www 1789: my ($crole,$cqual)=split(/\&/,$_);
1790: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1791: if ($pr{'cr:d'}=~/$crole\&/) {
1792: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1793: return "refused:d:$crole&$cqual";
1794: }
1795: }
1.191 harris41 1796: }
1797: foreach (split('/',$courole)) {
1.21 www 1798: my ($crole,$cqual)=split(/\&/,$_);
1799: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1800: if ($pr{'cr:c'}=~/$crole\&/) {
1801: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1802: return "refused:c:$crole&$cqual";
1803: }
1804: }
1.191 harris41 1805: }
1.12 www 1806: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1807: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1.21 www 1808: "rolesdef_$rolename=".
1809: escape($sysrole.'_'.$domrole.'_'.$courole);
1.12 www 1810: return reply($command,$ENV{'user.home'});
1811: } else {
1812: return 'refused';
1813: }
1.105 harris41 1814: }
1815:
1816: # ---------------- Make a metadata query against the network of library servers
1817:
1818: sub metadata_query {
1.244 matthew 1819: my ($query,$custom,$customshow,$server_array)=@_;
1.120 harris41 1820: my %rhash;
1.244 matthew 1821: my @server_list = (defined($server_array) ? @$server_array
1822: : keys(%libserv) );
1823: for my $server (@server_list) {
1.118 harris41 1824: unless ($custom or $customshow) {
1825: my $reply=&reply("querysend:".&escape($query),$server);
1826: $rhash{$server}=$reply;
1827: }
1828: else {
1829: my $reply=&reply("querysend:".&escape($query).':'.
1830: &escape($custom).':'.&escape($customshow),
1831: $server);
1832: $rhash{$server}=$reply;
1833: }
1.112 harris41 1834: }
1.118 harris41 1835: return \%rhash;
1.240 www 1836: }
1837:
1838: # ----------------------------------------- Send log queries and wait for reply
1839:
1840: sub log_query {
1841: my ($uname,$udom,$query,%filters)=@_;
1842: my $uhome=&homeserver($uname,$udom);
1843: if ($uhome eq 'no_host') { return 'error: no_host'; }
1844: my $uhost=$hostname{$uhome};
1.241 www 1845: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
1.240 www 1846: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
1847: $uhome);
1848: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
1.242 www 1849: return get_query_reply($queryid);
1850: }
1851:
1852: sub get_query_reply {
1853: my $queryid=shift;
1.240 www 1854: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
1855: my $reply='';
1856: for (1..100) {
1857: sleep 2;
1858: if (-e $replyfile.'.end') {
1859: if (my $fh=Apache::File->new($replyfile)) {
1860: $reply.=<$fh>;
1861: $fh->close;
1862: } else { return 'error: reply_file_error'; }
1.242 www 1863: return &unescape($reply);
1864: }
1.240 www 1865: }
1.242 www 1866: return 'timeout:'.$queryid;
1.240 www 1867: }
1868:
1869: sub courselog_query {
1.241 www 1870: #
1871: # possible filters:
1872: # url: url or symb
1873: # username
1874: # domain
1875: # action: view, submit, grade
1876: # start: timestamp
1877: # end: timestamp
1878: #
1.240 www 1879: my (%filters)=@_;
1880: unless ($ENV{'request.course.id'}) { return 'no_course'; }
1.241 www 1881: if ($filters{'url'}) {
1882: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
1883: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
1884: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
1885: }
1.240 www 1886: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1887: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1888: return &log_query($cname,$cdom,'courselog',%filters);
1889: }
1890:
1891: sub userlog_query {
1892: my ($uname,$udom,%filters)=@_;
1893: return &log_query($uname,$udom,'userlog',%filters);
1.12 www 1894: }
1895:
1896: # ------------------------------------------------------------------ Plain Text
1897:
1898: sub plaintext {
1.22 www 1899: my $short=shift;
1900: return $prp{$short};
1.12 www 1901: }
1902:
1903: # ----------------------------------------------------------------- Assign Role
1904:
1905: sub assignrole {
1.21 www 1906: my ($udom,$uname,$url,$role,$end,$start)=@_;
1907: my $mrole;
1908: if ($role =~ /^cr\//) {
1.104 www 1909: unless (&allowed('ccr',$url)) {
1910: &logthis('Refused custom assignrole: '.
1911: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1912: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1913: return 'refused';
1914: }
1.21 www 1915: $mrole='cr';
1916: } else {
1.82 www 1917: my $cwosec=$url;
1.83 www 1918: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1.104 www 1919: unless (&allowed('c'.$role,$cwosec)) {
1920: &logthis('Refused assignrole: '.
1921: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1922: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1923: return 'refused';
1924: }
1.21 www 1925: $mrole=$role;
1926: }
1927: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1928: "$udom:$uname:$url".'_'."$mrole=$role";
1.81 www 1929: if ($end) { $command.='_'.$end; }
1.21 www 1930: if ($start) {
1931: if ($end) {
1.81 www 1932: $command.='_'.$start;
1.21 www 1933: } else {
1.81 www 1934: $command.='_0_'.$start;
1.21 www 1935: }
1936: }
1937: return &reply($command,&homeserver($uname,$udom));
1.169 harris41 1938: }
1939:
1940: # -------------------------------------------------- Modify user authentication
1.197 www 1941: # Overrides without validation
1942:
1.169 harris41 1943: sub modifyuserauth {
1944: my ($udom,$uname,$umode,$upass)=@_;
1945: my $uhome=&homeserver($uname,$udom);
1.197 www 1946: unless (&allowed('mau',$udom)) { return 'refused'; }
1947: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
1.169 harris41 1948: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1949: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
1950: &escape($upass),$uhome);
1.197 www 1951: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
1952: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
1953: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
1954: &log($udom,,$uname,$uhome,
1955: 'Authentication changed by '.$ENV{'user.domain'}.', '.
1956: $ENV{'user.name'}.', '.$umode.
1957: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
1.169 harris41 1958: unless ($reply eq 'ok') {
1.197 www 1959: &logthis('Authentication mode error: '.$reply);
1.169 harris41 1960: return 'error: '.$reply;
1961: }
1.170 harris41 1962: return 'ok';
1.80 www 1963: }
1964:
1.81 www 1965: # --------------------------------------------------------------- Modify a user
1.80 www 1966:
1.81 www 1967: sub modifyuser {
1.206 matthew 1968: my ($udom, $uname, $uid,
1969: $umode, $upass, $first,
1970: $middle, $last, $gene,
1971: $forceid, $desiredhome)=@_;
1.198 www 1972: $udom=~s/\W//g;
1973: $uname=~s/\W//g;
1.81 www 1974: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1.80 www 1975: $umode.', '.$first.', '.$middle.', '.
1.206 matthew 1976: $last.', '.$gene.'(forceid: '.$forceid.')'.
1977: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
1978: ' desiredhome not specified').
1979: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1.230 stredwic 1980: my $uhome=&homeserver($uname,$udom,'true');
1.80 www 1981: # ----------------------------------------------------------------- Create User
1.81 www 1982: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1.80 www 1983: my $unhome='';
1.209 matthew 1984: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
1985: $unhome = $desiredhome;
1986: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1.80 www 1987: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1.209 matthew 1988: } else { # load balancing routine for determining $unhome
1.80 www 1989: my $tryserver;
1.81 www 1990: my $loadm=10000000;
1.80 www 1991: foreach $tryserver (keys %libserv) {
1992: if ($hostdom{$tryserver} eq $udom) {
1993: my $answer=reply('load',$tryserver);
1994: if (($answer=~/\d+/) && ($answer<$loadm)) {
1995: $loadm=$answer;
1996: $unhome=$tryserver;
1997: }
1998: }
1999: }
2000: }
2001: if (($unhome eq '') || ($unhome eq 'no_host')) {
1.206 matthew 2002: return 'error: unable to find a home server for '.$uname.
2003: ' in domain '.$udom;
1.80 www 2004: }
2005: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2006: &escape($upass),$unhome);
2007: unless ($reply eq 'ok') {
2008: return 'error: '.$reply;
2009: }
1.230 stredwic 2010: $uhome=&homeserver($uname,$udom,'true');
1.80 www 2011: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2012: return 'error: verify home';
2013: }
1.209 matthew 2014: } # End of creation of new user
1.80 www 2015: # ---------------------------------------------------------------------- Add ID
2016: if ($uid) {
2017: $uid=~tr/A-Z/a-z/;
2018: my %uidhash=&idrget($udom,$uname);
1.196 www 2019: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2020: && (!$forceid)) {
1.80 www 2021: unless ($uid eq $uidhash{$uname}) {
2022: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2023: }
2024: } else {
2025: &idput($udom,($uname => $uid));
2026: }
2027: }
2028: # -------------------------------------------------------------- Add names, etc
1.134 albertel 2029: my %names=&get('environment',
2030: ['firstname','middlename','lastname','generation'],
2031: $udom,$uname);
1.207 albertel 2032: if ($names{'firstname'} =~ m/^error:.*/) { %names=(); }
1.134 albertel 2033: if ($first) { $names{'firstname'} = $first; }
2034: if ($middle) { $names{'middlename'} = $middle; }
2035: if ($last) { $names{'lastname'} = $last; }
2036: if ($gene) { $names{'generation'} = $gene; }
2037: my $reply = &put('environment', \%names, $udom,$uname);
2038: if ($reply ne 'ok') { return 'error: '.$reply; }
1.81 www 2039: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1.80 www 2040: $umode.', '.$first.', '.$middle.', '.
2041: $last.', '.$gene.' by '.
2042: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1.134 albertel 2043: return 'ok';
1.80 www 2044: }
2045:
1.81 www 2046: # -------------------------------------------------------------- Modify student
1.80 www 2047:
1.81 www 2048: sub modifystudent {
2049: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1.209 matthew 2050: $end,$start,$forceid,$desiredhome)=@_;
1.81 www 2051: my $cid='';
2052: unless ($cid=$ENV{'request.course.id'}) {
1.80 www 2053: return 'not_in_class';
2054: }
2055: # --------------------------------------------------------------- Make the user
1.81 www 2056: my $reply=&modifyuser
1.209 matthew 2057: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2058: $desiredhome);
1.80 www 2059: unless ($reply eq 'ok') { return $reply; }
1.81 www 2060: my $uhome=&homeserver($uname,$udom);
2061: if (($uhome eq '') || ($uhome eq 'no_host')) {
2062: return 'error: no such user';
2063: }
1.80 www 2064: # -------------------------------------------------- Add student to course list
1.160 www 2065: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1.81 www 2066: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2067: &escape($uname.':'.$udom).'='.
2068: &escape($end.':'.$start),
2069: $ENV{'course.'.$cid.'.home'});
2070: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2071: return 'error: '.$reply;
2072: }
1.80 www 2073: # ---------------------------------------------------- Add student role to user
1.83 www 2074: my $uurl='/'.$cid;
1.81 www 2075: $uurl=~s/\_/\//g;
2076: if ($usec) {
2077: $uurl.='/'.$usec;
2078: }
2079: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1.21 www 2080: }
2081:
1.84 www 2082: # ------------------------------------------------- Write to course preferences
2083:
2084: sub writecoursepref {
2085: my ($courseid,%prefs)=@_;
2086: $courseid=~s/^\///;
2087: $courseid=~s/\_/\//g;
2088: my ($cdomain,$cnum)=split(/\//,$courseid);
2089: my $chome=homeserver($cnum,$cdomain);
2090: if (($chome eq '') || ($chome eq 'no_host')) {
2091: return 'error: no such course';
2092: }
2093: my $cstring='';
1.191 harris41 2094: foreach (keys %prefs) {
1.84 www 2095: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1.191 harris41 2096: }
1.84 www 2097: $cstring=~s/\&$//;
2098: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2099: }
2100:
2101: # ---------------------------------------------------------- Make/modify course
2102:
2103: sub createcourse {
2104: my ($udom,$description,$url)=@_;
2105: $url=&declutter($url);
2106: my $cid='';
2107: unless (&allowed('ccc',$ENV{'user.domain'})) {
2108: return 'refused';
2109: }
2110: unless ($udom eq $ENV{'user.domain'}) {
2111: return 'refused';
2112: }
2113: # ------------------------------------------------------------------- Create ID
2114: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2115: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2116: # ----------------------------------------------- Make sure that does not exist
1.230 stredwic 2117: my $uhome=&homeserver($uname,$udom,'true');
1.84 www 2118: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2119: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2120: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1.230 stredwic 2121: $uhome=&homeserver($uname,$udom,'true');
1.84 www 2122: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2123: return 'error: unable to generate unique course-ID';
2124: }
2125: }
2126: # ------------------------------------------------------------- Make the course
2127: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2128: $ENV{'user.home'});
2129: unless ($reply eq 'ok') { return 'error: '.$reply; }
1.230 stredwic 2130: $uhome=&homeserver($uname,$udom,'true');
1.84 www 2131: if (($uhome eq '') || ($uhome eq 'no_host')) {
2132: return 'error: no such course';
2133: }
2134: &writecoursepref($udom.'_'.$uname,
2135: ('description' => $description,
2136: 'url' => $url));
2137: return '/'.$udom.'/'.$uname;
2138: }
2139:
1.21 www 2140: # ---------------------------------------------------------- Assign Custom Role
2141:
2142: sub assigncustomrole {
2143: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2144: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2145: $end,$start);
2146: }
2147:
2148: # ----------------------------------------------------------------- Revoke Role
2149:
2150: sub revokerole {
2151: my ($udom,$uname,$url,$role)=@_;
2152: my $now=time;
2153: return &assignrole($udom,$uname,$url,$role,$now);
2154: }
2155:
2156: # ---------------------------------------------------------- Revoke Custom Role
2157:
2158: sub revokecustomrole {
2159: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2160: my $now=time;
2161: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1.17 www 2162: }
2163:
2164: # ------------------------------------------------------------ Directory lister
2165:
2166: sub dirlist {
2167: my $uri=shift;
1.18 www 2168: $uri=~s/^\///;
2169: $uri=~s/\/$//;
1.19 www 2170: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
2171: if ($udom) {
2172: if ($uname) {
2173: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
2174: homeserver($uname,$udom));
2175: return split(/:/,$listing);
2176: } else {
2177: my $tryserver;
2178: my %allusers=();
2179: foreach $tryserver (keys %libserv) {
2180: if ($hostdom{$tryserver} eq $udom) {
2181: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
2182: $tryserver);
2183: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2184: && ($listing ne 'con_lost')) {
1.191 harris41 2185: foreach (split(/:/,$listing)) {
1.19 www 2186: my ($entry,@stat)=split(/&/,$_);
2187: $allusers{$entry}=1;
1.191 harris41 2188: }
1.19 www 2189: }
2190: }
2191: }
2192: my $alluserstr='';
1.191 harris41 2193: foreach (sort keys %allusers) {
1.19 www 2194: $alluserstr.=$_.'&user:';
1.191 harris41 2195: }
1.19 www 2196: $alluserstr=~s/:$//;
2197: return split(/:/,$alluserstr);
2198: }
2199: } else {
2200: my $tryserver;
2201: my %alldom=();
2202: foreach $tryserver (keys %libserv) {
2203: $alldom{$hostdom{$tryserver}}=1;
2204: }
2205: my $alldomstr='';
1.191 harris41 2206: foreach (sort keys %alldom) {
1.19 www 2207: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1.191 harris41 2208: }
1.19 www 2209: $alldomstr=~s/:$//;
2210: return split(/:/,$alldomstr);
2211: }
1.26 www 2212: }
2213:
2214: # -------------------------------------------------------- Value of a Condition
2215:
1.40 www 2216: sub directcondval {
2217: my $number=shift;
2218: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2219: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2220: } else {
2221: return 2;
2222: }
2223: }
2224:
1.26 www 2225: sub condval {
2226: my $condidx=shift;
2227: my $result=0;
1.54 www 2228: my $allpathcond='';
1.191 harris41 2229: foreach (split(/\|/,$condidx)) {
1.54 www 2230: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2231: $allpathcond.=
2232: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2233: }
1.191 harris41 2234: }
1.54 www 2235: $allpathcond=~s/\|$//;
1.33 www 2236: if ($ENV{'request.course.id'}) {
1.54 www 2237: if ($allpathcond) {
1.26 www 2238: my $operand='|';
2239: my @stack;
1.191 harris41 2240: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
1.26 www 2241: if ($_ eq '(') {
2242: push @stack,($operand,$result)
2243: } elsif ($_ eq ')') {
2244: my $before=pop @stack;
2245: if (pop @stack eq '&') {
2246: $result=$result>$before?$before:$result;
2247: } else {
2248: $result=$result>$before?$result:$before;
2249: }
2250: } elsif (($_ eq '&') || ($_ eq '|')) {
2251: $operand=$_;
2252: } else {
1.40 www 2253: my $new=directcondval($_);
1.26 www 2254: if ($operand eq '&') {
2255: $result=$result>$new?$new:$result;
2256: } else {
2257: $result=$result>$new?$result:$new;
1.191 harris41 2258: }
1.26 www 2259: }
1.191 harris41 2260: }
1.26 www 2261: }
2262: }
2263: return $result;
1.28 www 2264: }
2265:
1.200 www 2266: # --------------------------------------------------- Course Resourcedata Query
2267:
2268: sub courseresdata {
2269: my ($coursenum,$coursedomain,@which)=@_;
2270: my $coursehom=&homeserver($coursenum,$coursedomain);
2271: my $hashid=$coursenum.':'.$coursedomain;
2272: unless (defined($courseresdatacache{$hashid.'.time'})) {
2273: unless (time-$courseresdatacache{$hashid.'.time'}<300) {
2274: my $coursehom=&homeserver($coursenum,$coursedomain);
2275: if ($coursehom) {
2276: my $dumpreply=&reply('dump:'.$coursedomain.':'.$coursenum.
2277: ':resourcedata:.',$coursehom);
2278: unless ($dumpreply=~/^error\:/) {
2279: $courseresdatacache{$hashid.'.time'}=time;
2280: $courseresdatacache{$hashid}=$dumpreply;
2281: }
2282: }
2283: }
2284: }
2285: my @pairs=split(/\&/,$courseresdatacache{$hashid});
2286: my %returnhash=();
2287: foreach (@pairs) {
2288: my ($key,$value)=split(/=/,$_);
2289: $returnhash{unescape($key)}=unescape($value);
2290: }
2291: my $item;
2292: foreach $item (@which) {
2293: if ($returnhash{$item}) { return $returnhash{$item}; }
2294: }
2295: return '';
2296: }
2297:
1.28 www 2298: # --------------------------------------------------------- Value of a Variable
2299:
1.58 www 2300: sub EXT {
1.218 albertel 2301: my ($varname,$symbparm,$udom,$uname)=@_;
2302:
1.68 www 2303: unless ($varname) { return ''; }
1.218 albertel 2304:
2305: #get real user name/domain, courseid and symb
2306: my $courseid;
2307: if (!($uname && $udom)) {
2308: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2309: if (!$symbparm) { $symbparm=$cursymb; }
2310: } else {
2311: $courseid=$ENV{'request.course.id'};
2312: }
2313:
1.48 www 2314: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2315: my $rest;
2316: if ($therest[0]) {
2317: $rest=join('.',@therest);
2318: } else {
2319: $rest='';
2320: }
1.57 www 2321: my $qualifierrest=$qualifier;
2322: if ($rest) { $qualifierrest.='.'.$rest; }
2323: my $spacequalifierrest=$space;
2324: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1.28 www 2325: if ($realm eq 'user') {
1.48 www 2326: # --------------------------------------------------------------- user.resource
2327: if ($space eq 'resource') {
1.218 albertel 2328: my %restored=&restore(undef,undef,$udom,$uname);
1.57 www 2329: return $restored{$qualifierrest};
1.48 www 2330: # ----------------------------------------------------------------- user.access
2331: } elsif ($space eq 'access') {
1.218 albertel 2332: # FIXME - not supporting calls for a specific user
1.48 www 2333: return &allowed($qualifier,$rest);
2334: # ------------------------------------------ user.preferences, user.environment
2335: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1.218 albertel 2336: if (($uname eq $ENV{'user.name'}) &&
2337: ($udom eq $ENV{'user.domain'})) {
2338: return $ENV{join('.',('environment',$qualifierrest))};
2339: } else {
2340: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2341: return $returnhash{$qualifierrest};
2342: }
1.48 www 2343: # ----------------------------------------------------------------- user.course
2344: } elsif ($space eq 'course') {
1.218 albertel 2345: # FIXME - not supporting calls for a specific user
1.48 www 2346: return $ENV{join('.',('request.course',$qualifier))};
2347: # ------------------------------------------------------------------- user.role
2348: } elsif ($space eq 'role') {
1.218 albertel 2349: # FIXME - not supporting calls for a specific user
1.48 www 2350: my ($role,$where)=split(/\./,$ENV{'request.role'});
2351: if ($qualifier eq 'value') {
2352: return $role;
2353: } elsif ($qualifier eq 'extent') {
2354: return $where;
2355: }
2356: # ----------------------------------------------------------------- user.domain
2357: } elsif ($space eq 'domain') {
1.218 albertel 2358: return $udom;
1.48 www 2359: # ------------------------------------------------------------------- user.name
2360: } elsif ($space eq 'name') {
1.218 albertel 2361: return $uname;
1.48 www 2362: # ---------------------------------------------------- Any other user namespace
1.29 www 2363: } else {
1.48 www 2364: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1.131 albertel 2365: my %reply=&get($space,[$item]);
1.48 www 2366: return $reply{$item};
2367: }
1.236 www 2368: } elsif ($realm eq 'query') {
2369: # ---------------------------------------------- pull stuff out of query string
2370: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
2371: return $ENV{'form.'.$space};
2372: } elsif ($realm eq 'request') {
1.48 www 2373: # ------------------------------------------------------------- request.browser
2374: if ($space eq 'browser') {
2375: return $ENV{'browser.'.$qualifier};
1.57 www 2376: # ------------------------------------------------------------ request.filename
2377: } else {
2378: return $ENV{'request.'.$spacequalifierrest};
1.29 www 2379: }
1.28 www 2380: } elsif ($realm eq 'course') {
1.48 www 2381: # ---------------------------------------------------------- course.description
1.218 albertel 2382: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
1.57 www 2383: } elsif ($realm eq 'resource') {
1.165 www 2384:
1.218 albertel 2385: if ($courseid eq $ENV{'request.course.id'}) {
1.165 www 2386:
1.218 albertel 2387: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
1.165 www 2388:
1.60 www 2389: # ----------------------------------------------------- Cascading lookup scheme
1.218 albertel 2390: if (!$symbparm) { $symbparm=&symbread(); }
2391: my $symbp=$symbparm;
2392: my $mapp=(split(/\_\_\_/,$symbp))[0];
2393:
2394: my $symbparm=$symbp.'.'.$spacequalifierrest;
2395: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2396:
2397: my $section;
2398: if (($ENV{'user.name'} eq $uname) &&
2399: ($ENV{'user.domain'} eq $udom)) {
2400: $section={'request.course.sec'};
2401: } else {
2402: $section=&usection($udom,$uname,$courseid);
2403: }
2404:
2405: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
2406: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
2407: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
2408:
2409: my $courselevel=$courseid.'.'.$spacequalifierrest;
2410: my $courselevelr=$courseid.'.'.$symbparm;
2411: my $courselevelm=$courseid.'.'.$mapparm;
1.69 www 2412:
1.60 www 2413: # ----------------------------------------------------------- first, check user
1.218 albertel 2414: my %resourcedata=&get('resourcedata',
2415: [$courselevelr,$courselevelm,$courselevel],
2416: $udom,$uname);
2417: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2418: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2419:
2420: if ($resourcedata{$courselevelr}) {
2421: return $resourcedata{$courselevelr}; }
2422: if ($resourcedata{$courselevelm}) {
2423: return $resourcedata{$courselevelm}; }
2424: if ($resourcedata{$courselevel}) {
2425: return $resourcedata{$courselevel}; }
2426: } else {
2427: if ($resourcedata{$courselevelr}!~/No such file/) {
2428: &logthis("<font color=blue>WARNING:".
2429: " Trying to get resource data for ".
2430: $uname." at ".$udom.": ".
2431: $resourcedata{$courselevelr}."</font>");
2432: }
2433: }
1.95 www 2434:
1.60 www 2435: # -------------------------------------------------------- second, check course
1.96 www 2436:
1.218 albertel 2437: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
2438: $ENV{'course.'.$courseid.'.domain'},
2439: ($seclevelr,$seclevelm,$seclevel,
2440: $courselevelr,$courselevelm,
2441: $courselevel));
2442: if ($coursereply) { return $coursereply; }
1.200 www 2443:
1.60 www 2444: # ------------------------------------------------------ third, check map parms
1.218 albertel 2445: my %parmhash=();
2446: my $thisparm='';
2447: if (tie(%parmhash,'GDBM_File',
2448: $ENV{'request.course.fn'}.'_parms.db',
2449: &GDBM_READER,0640)) {
2450: $thisparm=$parmhash{$symbparm};
2451: untie(%parmhash);
2452: }
2453: if ($thisparm) { return $thisparm; }
2454: }
1.60 www 2455: # --------------------------------------------- last, look in resource metadata
1.71 www 2456:
1.218 albertel 2457: $spacequalifierrest=~s/\./\_/;
2458: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2459: if ($metadata) { return $metadata; }
2460: $metadata=&metadata($ENV{'request.filename'},
2461: 'parameter_'.$spacequalifierrest);
2462: if ($metadata) { return $metadata; }
1.142 www 2463:
1.145 www 2464: # ------------------------------------------------------------------ Cascade up
1.218 albertel 2465: unless ($space eq '0') {
2466: my ($part,$id)=split(/\_/,$space);
2467: if ($id) {
2468: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2469: $symbparm,$udom,$uname);
2470: if ($partgeneral) { return $partgeneral; }
2471: } else {
2472: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2473: $symbparm,$udom,$uname);
2474: if ($resourcegeneral) { return $resourcegeneral; }
2475: }
2476: }
1.71 www 2477:
1.48 www 2478: # ---------------------------------------------------- Any other user namespace
2479: } elsif ($realm eq 'environment') {
2480: # ----------------------------------------------------------------- environment
1.219 albertel 2481: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
2482: return $ENV{'environment.'.$spacequalifierrest};
2483: } else {
2484: my %returnhash=&userenvironment($udom,$uname,
2485: $spacequalifierrest);
2486: return $returnhash{$spacequalifierrest};
2487: }
1.28 www 2488: } elsif ($realm eq 'system') {
1.48 www 2489: # ----------------------------------------------------------------- system.time
2490: if ($space eq 'time') {
2491: return time;
2492: }
1.28 www 2493: }
1.48 www 2494: return '';
1.61 www 2495: }
2496:
1.71 www 2497: # ---------------------------------------------------------------- Get metadata
2498:
2499: sub metadata {
1.176 www 2500: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
1.78 www 2501:
1.71 www 2502: $uri=&declutter($uri);
1.73 www 2503: my $filename=$uri;
2504: $uri=~s/\.meta$//;
1.172 www 2505: #
2506: # Is the metadata already cached?
1.177 www 2507: # Look at timestamp of caching
1.172 www 2508: # Everything is cached by the main uri, libraries are never directly cached
2509: #
1.174 www 2510: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
1.172 www 2511: #
2512: # Is this a recursive call for a library?
2513: #
1.171 www 2514: if ($liburi) {
2515: $liburi=&declutter($liburi);
2516: $filename=$liburi;
2517: }
1.140 www 2518: my %metathesekeys=();
1.73 www 2519: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2520: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
1.208 albertel 2521: my $parser=HTML::LCParser->new(\$metastring);
1.71 www 2522: my $token;
1.140 www 2523: undef %metathesekeys;
1.71 www 2524: while ($token=$parser->get_token) {
2525: if ($token->[0] eq 'S') {
1.135 www 2526: if (defined($token->[2]->{'package'})) {
1.172 www 2527: #
2528: # This is a package - get package info
2529: #
1.136 www 2530: my $package=$token->[2]->{'package'};
2531: my $keyroot='';
1.172 www 2532: if ($prefix) {
2533: $keyroot.='_'.$prefix;
2534: } else {
2535: if (defined($token->[2]->{'part'})) {
2536: $keyroot.='_'.$token->[2]->{'part'};
2537: }
1.136 www 2538: }
2539: if (defined($token->[2]->{'id'})) {
1.165 www 2540: $keyroot.='_'.$token->[2]->{'id'};
1.136 www 2541: }
2542: if ($metacache{$uri.':packages'}) {
2543: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2544: } else {
2545: $metacache{$uri.':packages'}=$package.$keyroot;
2546: }
1.191 harris41 2547: foreach (keys %packagetab) {
1.137 www 2548: if ($_=~/^$package\&/) {
2549: my ($pack,$name,$subp)=split(/\&/,$_);
1.139 www 2550: my $value=$packagetab{$_};
1.144 www 2551: my $part=$keyroot;
2552: $part=~s/^\_//;
1.139 www 2553: if ($subp eq 'display') {
2554: $value.=' [Part: '.$part.']';
2555: }
2556: my $unikey='parameter'.$keyroot.'_'.$name;
1.140 www 2557: $metathesekeys{$unikey}=1;
1.144 www 2558: $metacache{$uri.':'.$unikey.'.part'}=$part;
1.141 www 2559: unless
2560: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2561: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2562: }
1.137 www 2563: }
1.191 harris41 2564: }
1.135 www 2565: } else {
1.172 www 2566: #
2567: # This is not a package - some other kind of start tag
2568: #
1.175 www 2569: my $entry=$token->[1];
1.176 www 2570: my $unikey;
2571: if ($entry eq 'import') {
2572: $unikey='';
2573: } else {
2574: $unikey=$entry;
2575: }
1.172 www 2576: if ($prefix) {
1.176 www 2577: $unikey.=$prefix;
1.172 www 2578: } else {
2579: if (defined($token->[2]->{'part'})) {
2580: $unikey.='_'.$token->[2]->{'part'};
2581: }
1.136 www 2582: }
2583: if (defined($token->[2]->{'id'})) {
1.165 www 2584: $unikey.='_'.$token->[2]->{'id'};
1.71 www 2585: }
1.175 www 2586:
2587: if ($entry eq 'import') {
2588: #
2589: # Importing a library here
1.176 www 2590: #
2591: if (defined($depthcount)) { $depthcount++; } else
2592: { $depthcount=0; }
2593: if ($depthcount<20) {
1.191 harris41 2594: foreach (split(/\,/,&metadata($uri,'keys',
2595: $parser->get_text('/import'),$unikey,
2596: $depthcount))) {
1.177 www 2597: $metathesekeys{$_}=1;
1.191 harris41 2598: }
1.176 www 2599: }
1.175 www 2600: } else {
2601:
1.72 www 2602: if (defined($token->[2]->{'name'})) {
1.71 www 2603: $unikey.='_'.$token->[2]->{'name'};
2604: }
1.140 www 2605: $metathesekeys{$unikey}=1;
1.191 harris41 2606: foreach (@{$token->[3]}) {
1.71 www 2607: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
1.191 harris41 2608: }
1.78 www 2609: unless (
1.208 albertel 2610: $metacache{$uri.':'.$unikey}=&HTML::Entities::decode($parser->get_text('/'.$entry))
1.78 www 2611: ) { $metacache{$uri.':'.$unikey}=
2612: $metacache{$uri.':'.$unikey.'.default'};
2613: }
1.172 www 2614: # end of not-a-package not-a-library import
1.175 www 2615: }
1.172 www 2616: # end of not-a-package start tag
2617: }
2618: # the next is the end of "start tag"
1.140 www 2619: }
1.71 www 2620: }
1.140 www 2621: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
1.174 www 2622: $metacache{$uri.':cachedtimestamp'}=time;
1.177 www 2623: # this is the end of "was not already recently cached
1.71 www 2624: }
2625: return $metacache{$uri.':'.$what};
2626: }
2627:
1.31 www 2628: # ------------------------------------------------- Update symbolic store links
2629:
2630: sub symblist {
2631: my ($mapname,%newhash)=@_;
2632: $mapname=declutter($mapname);
2633: my %hash;
2634: if (($ENV{'request.course.fn'}) && (%newhash)) {
2635: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2636: &GDBM_WRCREAT,0640)) {
1.191 harris41 2637: foreach (keys %newhash) {
1.211 www 2638: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1.191 harris41 2639: }
1.31 www 2640: if (untie(%hash)) {
2641: return 'ok';
2642: }
2643: }
2644: }
2645: return 'error';
1.212 www 2646: }
2647:
2648: # --------------------------------------------------------------- Verify a symb
2649:
2650: sub symbverify {
2651: my ($symb,$thisfn)=@_;
1.213 www 2652: $thisfn=&declutter($thisfn);
1.215 www 2653: # direct jump to resource in page or to a sequence - will construct own symbs
2654: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
2655: # check URL part
1.213 www 2656: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
2657: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
2658:
1.216 www 2659: $symb=&symbclean($symb);
1.213 www 2660:
2661: my %bighash;
2662: my $okay=0;
2663: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2664: &GDBM_READER,0640)) {
1.216 www 2665: my $ids=$bighash{'ids_/res/'.$thisfn};
2666: unless ($ids) {
2667: $ids=$bighash{'ids_/'.$thisfn};
2668: }
2669: if ($ids) {
2670: # ------------------------------------------------------------------- Has ID(s)
2671: foreach (split(/\,/,$ids)) {
2672: my ($mapid,$resid)=split(/\./,$_);
2673: if (
2674: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
2675: eq $symb) {
2676: $okay=1;
2677: }
2678: }
2679: }
1.213 www 2680: untie(%bighash);
2681: }
2682: return $okay;
1.31 www 2683: }
2684:
1.210 www 2685: # --------------------------------------------------------------- Clean-up symb
2686:
2687: sub symbclean {
2688: my $symb=shift;
1.213 www 2689:
1.210 www 2690: # remove version from map
2691: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
1.215 www 2692:
1.210 www 2693: # remove version from URL
2694: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
1.213 www 2695:
1.210 www 2696: return $symb;
2697: }
2698:
1.31 www 2699: # ------------------------------------------------------ Return symb list entry
2700:
2701: sub symbread {
1.44 www 2702: my $thisfn=shift;
1.242 www 2703: # no filename provided? try from environment
1.44 www 2704: unless ($thisfn) {
1.210 www 2705: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
1.44 www 2706: $thisfn=$ENV{'request.filename'};
2707: }
1.242 www 2708: # is that filename actually a symb? Verify, clean, and return
2709: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
2710: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
2711: }
1.44 www 2712: $thisfn=declutter($thisfn);
1.31 www 2713: my %hash;
1.37 www 2714: my %bighash;
2715: my $syval='';
1.45 www 2716: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1.31 www 2717: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2718: &GDBM_READER,0640)) {
2719: $syval=$hash{$thisfn};
1.37 www 2720: untie(%hash);
2721: }
2722: # ---------------------------------------------------------- There was an entry
2723: if ($syval) {
2724: unless ($syval=~/\_\d+$/) {
2725: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1.44 www 2726: &appenv('request.ambiguous' => $thisfn);
1.37 www 2727: return '';
2728: }
2729: $syval.=$1;
2730: }
2731: } else {
2732: # ------------------------------------------------------- Was not in symb table
2733: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2734: &GDBM_READER,0640)) {
2735: # ---------------------------------------------- Get ID(s) for current resource
2736: my $ids=$bighash{'ids_/res/'.$thisfn};
1.65 www 2737: unless ($ids) {
2738: $ids=$bighash{'ids_/'.$thisfn};
1.242 www 2739: }
2740: unless ($ids) {
2741: # alias?
2742: $ids=$bighash{'mapalias_'.$thisfn};
1.65 www 2743: }
1.37 www 2744: if ($ids) {
2745: # ------------------------------------------------------------------- Has ID(s)
2746: my @possibilities=split(/\,/,$ids);
1.39 www 2747: if ($#possibilities==0) {
2748: # ----------------------------------------------- There is only one possibility
1.37 www 2749: my ($mapid,$resid)=split(/\./,$ids);
2750: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2751: } else {
1.39 www 2752: # ------------------------------------------ There is more than one possibility
2753: my $realpossible=0;
1.191 harris41 2754: foreach (@possibilities) {
1.39 www 2755: my $file=$bighash{'src_'.$_};
2756: if (&allowed('bre',$file)) {
2757: my ($mapid,$resid)=split(/\./,$_);
2758: if ($bighash{'map_type_'.$mapid} ne 'page') {
2759: $realpossible++;
2760: $syval=declutter($bighash{'map_id_'.$mapid}).
2761: '___'.$resid;
2762: }
2763: }
1.191 harris41 2764: }
1.39 www 2765: if ($realpossible!=1) { $syval=''; }
1.37 www 2766: }
2767: }
2768: untie(%bighash)
2769: }
1.31 www 2770: }
1.62 www 2771: if ($syval) {
1.210 www 2772: return &symbclean($syval.'___'.$thisfn);
1.62 www 2773: }
1.31 www 2774: }
1.44 www 2775: &appenv('request.ambiguous' => $thisfn);
1.31 www 2776: return '';
2777: }
2778:
2779: # ---------------------------------------------------------- Return random seed
2780:
1.32 www 2781: sub numval {
2782: my $txt=shift;
2783: $txt=~tr/A-J/0-9/;
2784: $txt=~tr/a-j/0-9/;
2785: $txt=~tr/K-T/0-9/;
2786: $txt=~tr/k-t/0-9/;
2787: $txt=~tr/U-Z/0-5/;
2788: $txt=~tr/u-z/0-5/;
2789: $txt=~s/\D//g;
2790: return int($txt);
2791: }
2792:
1.31 www 2793: sub rndseed {
1.155 albertel 2794: my ($symb,$courseid,$domain,$username)=@_;
2795: if (!$symb) {
2796: unless ($symb=&symbread()) { return time; }
2797: }
2798: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2799: if (!$domain) {$domain=$ENV{'user.domain'};}
2800: if (!$username) {$username=$ENV{'user.name'};}
2801: {
1.98 albertel 2802: use integer;
2803: my $symbchck=unpack("%32C*",$symb) << 27;
1.100 albertel 2804: my $symbseed=numval($symb) << 22;
1.155 albertel 2805: my $namechck=unpack("%32C*",$username) << 17;
2806: my $nameseed=numval($username) << 12;
2807: my $domainseed=unpack("%32C*",$domain) << 7;
2808: my $courseseed=unpack("%32C*",$courseid);
1.98 albertel 2809: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
1.99 albertel 2810: #uncommenting these lines can break things!
2811: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2812: #&Apache::lonxml::debug("rndseed :$num:$symb");
1.98 albertel 2813: return $num;
2814: }
1.36 albertel 2815: }
2816:
1.76 www 2817: sub ireceipt {
2818: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2819: my $cuname=unpack("%32C*",$funame);
2820: my $cudom=unpack("%32C*",$fudom);
2821: my $cucourseid=unpack("%32C*",$fucourseid);
2822: my $cusymb=unpack("%32C*",$fusymb);
1.77 www 2823: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
1.76 www 2824: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2825: ($cunique%$cuname+
2826: $cunique%$cudom+
2827: $cusymb%$cuname+
2828: $cusymb%$cudom+
2829: $cucourseid%$cuname+
2830: $cucourseid%$cudom);
2831: }
2832:
2833: sub receipt {
2834: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2835: $ENV{'request.course.id'},&symbread());
2836: }
2837:
1.36 albertel 2838: # ------------------------------------------------------------ Serves up a file
2839: # returns either the contents of the file or a -1
2840: sub getfile {
2841: my $file=shift;
1.37 www 2842: &repcopy($file);
1.36 albertel 2843: if (! -e $file ) { return -1; };
2844: my $fh=Apache::File->new($file);
2845: my $a='';
2846: while (<$fh>) { $a .=$_; }
2847: return $a
2848: }
2849:
2850: sub filelocation {
2851: my ($dir,$file) = @_;
2852: my $location;
2853: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
1.59 albertel 2854: if ($file=~m:^/~:) { # is a contruction space reference
2855: $location = $file;
2856: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
1.36 albertel 2857: } else {
1.59 albertel 2858: $file=~s/^$perlvar{'lonDocRoot'}//;
2859: $file=~s:^/*res::;
2860: if ( !( $file =~ m:^/:) ) {
2861: $location = $dir. '/'.$file;
2862: } else {
2863: $location = '/home/httpd/html/res'.$file;
2864: }
1.36 albertel 2865: }
2866: $location=~s://+:/:g; # remove duplicate /
1.46 www 2867: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2868: return $location;
2869: }
1.36 albertel 2870:
1.46 www 2871: sub hreflocation {
2872: my ($dir,$file)=@_;
1.191 harris41 2873: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
1.46 www 2874: my $finalpath=filelocation($dir,$file);
2875: $finalpath=~s/^\/home\/httpd\/html//;
1.225 albertel 2876: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
1.46 www 2877: return $finalpath;
2878: } else {
2879: return $file;
2880: }
1.31 www 2881: }
2882:
2883: # ------------------------------------------------------------- Declutters URLs
2884:
2885: sub declutter {
2886: my $thisfn=shift;
2887: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2888: $thisfn=~s/^\///;
2889: $thisfn=~s/^res\///;
1.235 www 2890: $thisfn=~s/\?.+$//;
1.31 www 2891: return $thisfn;
1.12 www 2892: }
2893:
2894: # -------------------------------------------------------- Escape Special Chars
2895:
2896: sub escape {
2897: my $str=shift;
2898: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2899: return $str;
2900: }
2901:
2902: # ----------------------------------------------------- Un-Escape Special Chars
2903:
2904: sub unescape {
2905: my $str=shift;
2906: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2907: return $str;
2908: }
1.11 www 2909:
1.1 albertel 2910: # ================================================================ Main Program
2911:
1.184 www 2912: sub goodbye {
1.204 albertel 2913: &logthis("Starting Shut down");
1.184 www 2914: &flushcourselogs();
2915: &logthis("Shutting down");
2916: }
2917:
1.179 www 2918: BEGIN {
1.228 harris41 2919: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
1.195 www 2920: unless ($readit) {
1.217 harris41 2921: {
2922: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
2923:
2924: while (my $configline=<$config>) {
2925: if ($configline =~ /^[^\#]*PerlSetVar/) {
1.1 albertel 2926: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
1.8 www 2927: chomp($varvalue);
1.1 albertel 2928: $perlvar{$varname}=$varvalue;
2929: }
2930: }
2931: }
1.227 harris41 2932: {
2933: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
2934:
2935: while (my $configline=<$config>) {
2936: if ($configline =~ /^[^\#]*PerlSetVar/) {
2937: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2938: chomp($varvalue);
2939: $perlvar{$varname}=$varvalue;
2940: }
2941: }
2942: }
1.1 albertel 2943:
2944: # ------------------------------------------------------------- Read hosts file
2945: {
2946: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2947:
2948: while (my $configline=<$config>) {
1.154 www 2949: chomp($configline);
1.245 www 2950: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
1.1 albertel 2951: $hostname{$id}=$name;
2952: $hostdom{$id}=$domain;
1.150 www 2953: $hostip{$id}=$ip;
1.245 www 2954: if ($domdescr) {
2955: $domaindescription{$domain}=$domdescr;
2956: }
1.1 albertel 2957: if ($role eq 'library') { $libserv{$id}=$name; }
2958: }
2959: }
2960:
2961: # ------------------------------------------------------ Read spare server file
2962: {
2963: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2964:
2965: while (my $configline=<$config>) {
2966: chomp($configline);
2967: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2968: $spareid{$configline}=1;
2969: }
2970: }
2971: }
1.11 www 2972: # ------------------------------------------------------------ Read permissions
2973: {
2974: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2975:
2976: while (my $configline=<$config>) {
2977: chomp($configline);
1.160 www 2978: if ($configline) {
1.11 www 2979: my ($role,$perm)=split(/ /,$configline);
2980: if ($perm ne '') { $pr{$role}=$perm; }
1.160 www 2981: }
1.11 www 2982: }
2983: }
2984:
2985: # -------------------------------------------- Read plain texts for permissions
2986: {
2987: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2988:
2989: while (my $configline=<$config>) {
2990: chomp($configline);
1.160 www 2991: if ($configline) {
1.11 www 2992: my ($short,$plain)=split(/:/,$configline);
2993: if ($plain ne '') { $prp{$short}=$plain; }
1.160 www 2994: }
1.135 www 2995: }
2996: }
2997:
2998: # ---------------------------------------------------------- Read package table
2999: {
3000: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3001:
3002: while (my $configline=<$config>) {
3003: chomp($configline);
3004: my ($short,$plain)=split(/:/,$configline);
1.143 www 3005: my ($pack,$name)=split(/\&/,$short);
3006: if ($plain ne '') {
3007: $packagetab{$pack.'&'.$name.'&name'}=$name;
3008: $packagetab{$short}=$plain;
1.25 www 3009: }
1.11 www 3010: }
3011: }
3012:
1.71 www 3013: %metacache=();
1.185 www 3014:
3015: $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
1.186 www 3016: $dumpcount=0;
1.22 www 3017:
1.163 harris41 3018: &logtouch();
1.12 www 3019: &logthis('<font color=yellow>INFO: Read configuration</font>');
1.195 www 3020: $readit=1;
3021: }
1.1 albertel 3022: }
1.179 www 3023:
1.1 albertel 3024: 1;
1.191 harris41 3025: __END__
3026:
1.243 albertel 3027: =pod
3028:
1.191 harris41 3029: =head1 NAME
3030:
1.243 albertel 3031: Apache::lonnet - Subroutines to ask questions about things in the network.
1.191 harris41 3032:
3033: =head1 SYNOPSIS
3034:
1.243 albertel 3035: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
1.191 harris41 3036:
3037: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3038:
1.243 albertel 3039: Common parameters:
3040:
3041: =over 4
3042:
3043: =item *
3044:
3045: $uname : an internal username (if $cname expecting a course Id specifically)
3046:
3047: =item *
3048:
3049: $udom : a domain (if $cdom expecting a course's domain specifically)
3050:
3051: =item *
3052:
3053: $symb : a resource instance identifier
3054:
3055: =item *
3056:
3057: $namespace : the name of a .db file that contains the data needed or
3058: being set.
3059:
3060: =back
3061:
1.191 harris41 3062: =head1 INTRODUCTION
3063:
3064: This module provides subroutines which interact with the
1.243 albertel 3065: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3066: - classes
3067: - users
3068: - resources
3069:
3070: For many of these objects you can also use this to store data about
3071: them or modify them in various ways.
1.191 harris41 3072:
3073: This is part of the LearningOnline Network with CAPA project
3074: described at http://www.lon-capa.org.
3075:
1.243 albertel 3076: =head1 RETURN MESSAGES
1.191 harris41 3077:
3078: =over 4
3079:
3080: =item *
3081:
1.243 albertel 3082: con_lost : unable to contact remote host
1.191 harris41 3083:
3084: =item *
3085:
1.243 albertel 3086: con_delayed : unable to contact remote host, message will be delivered
3087: when the connection is brought back up
1.191 harris41 3088:
3089: =item *
3090:
1.243 albertel 3091: con_failed : unable to contact remote host and unable to save message
3092: for later delivery
1.191 harris41 3093:
3094: =item *
3095:
1.243 albertel 3096: error: : an error a occured, a description of the error follows the :
1.191 harris41 3097:
3098: =item *
3099:
1.243 albertel 3100: no_such_host : unable to fund a host associated with the user/domain
3101: that was requested
1.191 harris41 3102:
1.243 albertel 3103: =back
1.191 harris41 3104:
1.243 albertel 3105: =head1 PUBLIC SUBROUTINES
1.191 harris41 3106:
1.243 albertel 3107: =head2 Session Environment Functions
1.191 harris41 3108:
1.243 albertel 3109: =over 4
1.191 harris41 3110:
3111: =item *
3112:
1.243 albertel 3113: appenv(%hash) : the value of %hash is written to the user envirnoment
3114: file, and will be restored for each access this user makes during this
3115: session, also modifies the %ENV for the current process
1.191 harris41 3116:
3117: =item *
3118:
1.243 albertel 3119: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
1.191 harris41 3120:
1.243 albertel 3121: =back
3122:
3123: =head2 User Information
1.191 harris41 3124:
1.243 albertel 3125: =over 4
1.191 harris41 3126:
3127: =item *
3128:
3129: queryauthenticate($uname,$udom) : try to determine user's current
3130: authentication scheme
3131:
3132: =item *
3133:
3134: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
1.243 albertel 3135: servers (first use the current one), $upass should be the users password
1.191 harris41 3136:
3137: =item *
3138:
1.243 albertel 3139: homeserver($uname,$udom) : find the server which has the user's
3140: directory and files (there must be only one), this caches the answer,
3141: and also caches if there is a borken connection.
1.191 harris41 3142:
3143: =item *
3144:
1.243 albertel 3145: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3146: unique resource in a domain, there must be only 1 ID per username, and
3147: only 1 username per ID in a specific domain) (returns hash:
1.191 harris41 3148: id=>name,id=>name)
3149:
3150: =item *
3151:
3152: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3153: name=>id,name=>id)
3154:
3155: =item *
3156:
3157: idput($udom,%ids) : store away a list of names and associated IDs
3158:
3159: =item *
3160:
1.243 albertel 3161: rolesinit($udom,$username,$authhost) : get user privileges
3162:
3163: =item *
3164:
3165: usection($udom,$uname,$cname) : finds the section of student in the
3166: course $cname, return section name/number or '' for "not in course"
3167: and '-1' for "no section"
3168:
3169: =item *
3170:
3171: userenvironment($udom,$uname,@what) : gets the values of the keys
3172: passed in @what from the requested user's environment, returns a hash
3173:
3174: =back
3175:
3176: =head2 User Roles
3177:
3178: =over 4
3179:
3180: =item *
3181:
3182: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
3183: actions
3184: F: full access
3185: U,I,K: authentication modes (cxx only)
3186: '': forbidden
3187: 1: user needs to choose course
3188: 2: browse allowed
3189:
3190: =item *
3191:
3192: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
3193: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
3194: and course level
3195:
3196: =item *
3197:
3198: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
3199: explanation of a user role term
3200:
3201: =back
3202:
3203: =head2 User Modification
3204:
3205: =over 4
3206:
3207: =item *
3208:
3209: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
3210: user for the level given by URL. Optional start and end dates (leave empty
3211: string or zero for "no date")
1.191 harris41 3212:
3213: =item *
3214:
1.243 albertel 3215: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
3216: change a users, password, possible return values are: ok,
3217: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
3218: refused
1.191 harris41 3219:
3220: =item *
3221:
1.243 albertel 3222: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
1.191 harris41 3223:
3224: =item *
3225:
1.243 albertel 3226: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
3227: modify user
1.191 harris41 3228:
3229: =item *
3230:
1.243 albertel 3231: modifystudent($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,$end,$start) : modify student
1.191 harris41 3232:
3233: =item *
3234:
1.243 albertel 3235: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
3236: custom role; give a custom role to a user for the level given by URL. Specify
3237: name and domain of role author, and role name
1.191 harris41 3238:
3239: =item *
3240:
1.243 albertel 3241: revokerole($udom,$uname,$url,$role) : revoke a role for url
1.191 harris41 3242:
3243: =item *
3244:
1.243 albertel 3245: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
3246:
3247: =back
3248:
3249: =head2 Course Infomation
3250:
3251: =over 4
1.191 harris41 3252:
3253: =item *
3254:
1.243 albertel 3255: coursedescription($courseid) : course description
1.191 harris41 3256:
3257: =item *
3258:
1.243 albertel 3259: courseresdata($coursenum,$coursedomain,@which) : request for current
3260: parameter setting for a specific course, @what should be a list of
3261: parameters to ask about. This routine caches answers for 5 minutes.
3262:
3263: =back
3264:
3265: =head2 Course Modification
3266:
3267: =over 4
1.191 harris41 3268:
3269: =item *
3270:
1.243 albertel 3271: writecoursepref($courseid,%prefs) : write preferences (environment
3272: database) for a course
1.191 harris41 3273:
3274: =item *
3275:
1.243 albertel 3276: createcourse($udom,$description,$url) : make/modify course
3277:
3278: =back
3279:
3280: =head2 Resource Subroutines
3281:
3282: =over 4
1.191 harris41 3283:
3284: =item *
3285:
1.243 albertel 3286: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
1.191 harris41 3287:
3288: =item *
3289:
1.243 albertel 3290: repcopy($filename) : subscribes to the requested file, and attempts to
3291: replicate from the owning library server, Might return
3292: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
3293: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
3294: resource. Expects the local filesystem pathname
3295: (/home/httpd/html/res/....)
3296:
3297: =back
3298:
3299: =head2 Resource Information
3300:
3301: =over 4
1.191 harris41 3302:
3303: =item *
3304:
1.243 albertel 3305: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
3306: a vairety of different possible values, $varname should be a request
3307: string, and the other parameters can be used to specify who and what
3308: one is asking about.
3309:
3310: Possible values for $varname are environment.lastname (or other item
3311: from the envirnment hash), user.name (or someother aspect about the
3312: user), resource.0.maxtries (or some other part and parameter of a
3313: resource)
1.204 albertel 3314:
3315: =item *
3316:
1.243 albertel 3317: directcondval($number) : get current value of a condition; reads from a state
3318: string
1.204 albertel 3319:
3320: =item *
3321:
1.243 albertel 3322: condval($condidx) : value of condition index based on state
1.204 albertel 3323:
3324: =item *
3325:
1.243 albertel 3326: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
3327: resource's metadata, $what should be either a specific key, or either
3328: 'keys' (to get a list of possible keys) or 'packages' to get a list of
3329: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
3330:
3331: this function automatically caches all requests
1.191 harris41 3332:
3333: =item *
3334:
1.243 albertel 3335: metadata_query($query,$custom,$customshow) : make a metadata query against the
3336: network of library servers; returns file handle of where SQL and regex results
3337: will be stored for query
1.191 harris41 3338:
3339: =item *
3340:
1.243 albertel 3341: symbread($filename) : return symbolic list entry (filename argument optional);
3342: returns the data handle
1.191 harris41 3343:
3344: =item *
3345:
1.243 albertel 3346: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
3347: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
3348: failure, user must be in a course, as it assumes the existance of the
3349: course initi hash, and uses $ENV('request.course.id'}
3350:
1.191 harris41 3351:
3352: =item *
3353:
1.243 albertel 3354: symbclean($symb) : removes versions numbers from a symb, returns the
3355: cleaned symb
1.191 harris41 3356:
3357: =item *
3358:
1.243 albertel 3359: is_on_map($uri) : checks if the $uri is somewhere on the current
3360: course map, user must be in a course for it to work.
1.191 harris41 3361:
3362: =item *
3363:
1.243 albertel 3364: numval($salt) : return random seed value (addend for rndseed)
1.191 harris41 3365:
3366: =item *
3367:
1.243 albertel 3368: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
3369: a random seed, all arguments are optional, if they aren't sent it uses the
3370: environment to derive them. Note: if symb isn't sent and it can't get one
3371: from &symbread it will use the current time as its return value
1.191 harris41 3372:
3373: =item *
3374:
1.243 albertel 3375: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
3376: unfakeable, receipt
1.191 harris41 3377:
3378: =item *
3379:
1.243 albertel 3380: receipt() : API to ireceipt working off of ENV values; given out to users
1.191 harris41 3381:
3382: =item *
3383:
1.243 albertel 3384: countacc($url) : count the number of accesses to a given URL
1.191 harris41 3385:
3386: =item *
3387:
1.243 albertel 3388: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
1.191 harris41 3389:
3390: =item *
3391:
1.243 albertel 3392: checkin($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 $tcrsid)
1.191 harris41 3393:
3394: =item *
3395:
1.243 albertel 3396: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
1.191 harris41 3397:
3398: =item *
3399:
1.243 albertel 3400: devalidate($symb) : devalidate temporary spreadsheet calculations,
3401: forcing spreadsheet to reevaluate the resource scores next time.
3402:
3403: =back
3404:
3405: =head2 Storing/Retreiving Data
3406:
3407: =over 4
1.191 harris41 3408:
3409: =item *
3410:
1.243 albertel 3411: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
3412: for this url; hashref needs to be given and should be a \%hashname; the
3413: remaining args aren't required and if they aren't passed or are '' they will
3414: be derived from the ENV
1.191 harris41 3415:
3416: =item *
3417:
1.243 albertel 3418: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
3419: uses critical subroutine
1.191 harris41 3420:
3421: =item *
3422:
1.243 albertel 3423: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
3424: all args are optional
1.191 harris41 3425:
3426: =item *
3427:
1.243 albertel 3428: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
3429: works very similar to store/cstore, but all data is stored in a
3430: temporary location and can be reset using tmpreset, $storehash should
3431: be a hash reference, returns nothing on success
1.191 harris41 3432:
3433: =item *
3434:
1.243 albertel 3435: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
3436: similar to restore, but all data is stored in a temporary location and
3437: can be reset using tmpreset. Returns a hash of values on success,
3438: error string otherwise.
1.191 harris41 3439:
3440: =item *
3441:
1.243 albertel 3442: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
3443: deltes all keys for $symb form the temporary storage hash.
1.191 harris41 3444:
3445: =item *
3446:
1.243 albertel 3447: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
3448: reference filled in from namesp ($udom and $uname are optional)
1.191 harris41 3449:
3450: =item *
3451:
1.243 albertel 3452: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
3453: namesp ($udom and $uname are optional)
1.191 harris41 3454:
3455: =item *
3456:
1.243 albertel 3457: dump($namespace,$udom,$uname,$regexp) :
3458: dumps the complete (or key matching regexp) namespace into a hash
3459: ($udom, $uname and $regexp are optional)
1.191 harris41 3460:
3461: =item *
3462:
1.243 albertel 3463: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
3464: ($udom and $uname are optional)
1.191 harris41 3465:
3466: =item *
3467:
1.243 albertel 3468: cput($namespace,$storehash,$udom,$uname) : critical put
3469: ($udom and $uname are optional)
1.191 harris41 3470:
3471: =item *
3472:
1.243 albertel 3473: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
3474: reference filled in from namesp (encrypts the return communication)
3475: ($udom and $uname are optional)
1.191 harris41 3476:
3477: =item *
3478:
1.243 albertel 3479: log($udom,$name,$home,$message) : write to permanent log for user; use
3480: critical subroutine
3481:
3482: =back
3483:
3484: =head2 Network Status Functions
3485:
3486: =over 4
1.191 harris41 3487:
3488: =item *
3489:
3490: dirlist($uri) : return directory list based on URI
3491:
3492: =item *
3493:
1.243 albertel 3494: spareserver() : find server with least workload from spare.tab
3495:
3496: =back
3497:
3498: =head2 Apache Request
3499:
3500: =over 4
1.191 harris41 3501:
3502: =item *
3503:
1.243 albertel 3504: ssi($url,%hash) : server side include, does a complete request cycle on url to
3505: localhost, posts hash
3506:
3507: =back
3508:
3509: =head2 Data to String to Data
3510:
3511: =over 4
1.191 harris41 3512:
3513: =item *
3514:
1.243 albertel 3515: hash2str(%hash) : convert a hash into a string complete with escaping and '='
3516: and '&' separators, supports elements that are arrayrefs and hashrefs
1.191 harris41 3517:
3518: =item *
3519:
1.243 albertel 3520: hashref2str($hashref) : convert a hashref into a string complete with
3521: escaping and '=' and '&' separators, supports elements that are
3522: arrayrefs and hashrefs
1.191 harris41 3523:
3524: =item *
3525:
1.243 albertel 3526: arrayref2str($arrayref) : convert an arrayref into a string complete
3527: with escaping and '&' separators, supports elements that are arrayrefs
3528: and hashrefs
1.191 harris41 3529:
3530: =item *
3531:
1.243 albertel 3532: str2hash($string) : convert string to hash using unescaping and
3533: splitting on '=' and '&', supports elements that are arrayrefs and
3534: hashrefs
1.191 harris41 3535:
3536: =item *
3537:
1.243 albertel 3538: str2array($string) : convert string to hash using unescaping and
3539: splitting on '&', supports elements that are arrayrefs and hashrefs
3540:
3541: =back
3542:
3543: =head2 Logging Routines
3544:
3545: =over 4
3546:
3547: These routines allow one to make log messages in the lonnet.log and
3548: lonnet.perm logfiles.
1.191 harris41 3549:
3550: =item *
3551:
1.243 albertel 3552: logtouch() : make sure the logfile, lonnet.log, exists
1.191 harris41 3553:
3554: =item *
3555:
1.243 albertel 3556: logthis() : append message to the normal lonnet.log file, it gets
3557: preiodically rolled over and deleted.
1.191 harris41 3558:
3559: =item *
3560:
1.243 albertel 3561: logperm() : append a permanent message to lonnet.perm.log, this log
3562: file never gets deleted by any automated portion of the system, only
3563: messages of critical importance should go in here.
3564:
3565: =back
3566:
3567: =head2 General File Helper Routines
3568:
3569: =over 4
1.191 harris41 3570:
3571: =item *
3572:
1.243 albertel 3573: getfile($file) : returns the entire contents of a file or -1; it
3574: properly subscribes to and replicates the file if neccessary.
1.191 harris41 3575:
3576: =item *
3577:
1.243 albertel 3578: filelocation($dir,$file) : returns file system location of a file
3579: based on URI; meant to be "fairly clean" absolute reference, $dir is a
3580: directory that relative $file lookups are to looked in ($dir of /a/dir
3581: and a file of ../bob will become /a/bob)
1.191 harris41 3582:
3583: =item *
3584:
3585: hreflocation($dir,$file) : returns file system location or a URL; same as
3586: filelocation except for hrefs
3587:
3588: =item *
3589:
3590: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
3591:
1.243 albertel 3592: =back
3593:
3594: =head2 HTTP Helper Routines
3595:
3596: =over 4
3597:
1.191 harris41 3598: =item *
3599:
3600: escape() : unpack non-word characters into CGI-compatible hex codes
3601:
3602: =item *
3603:
3604: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
3605:
1.243 albertel 3606: =back
3607:
3608: =head1 PRIVATE SUBROUTINES
3609:
3610: =head2 Underlying communication routines (Shouldn't call)
3611:
3612: =over 4
3613:
3614: =item *
3615:
3616: subreply() : tries to pass a message to lonc, returns con_lost if incapable
3617:
3618: =item *
3619:
3620: reply() : uses subreply to send a message to remote machine, logs all failures
3621:
3622: =item *
3623:
3624: critical() : passes a critical message to another server; if cannot
3625: get through then place message in connection buffer directory and
3626: returns con_delayed, if incapable of saving message, returns
3627: con_failed
3628:
3629: =item *
3630:
3631: reconlonc() : tries to reconnect lonc client processes.
3632:
3633: =back
3634:
3635: =head2 Resource Access Logging
3636:
3637: =over 4
3638:
3639: =item *
3640:
3641: flushcourselogs() : flush (save) buffer logs and access logs
3642:
3643: =item *
3644:
3645: courselog($what) : save message for course in hash
3646:
3647: =item *
3648:
3649: courseacclog($what) : save message for course using &courselog(). Perform
3650: special processing for specific resource types (problems, exams, quizzes, etc).
3651:
1.191 harris41 3652: =item *
3653:
3654: goodbye() : flush course logs and log shutting down; it is called in srm.conf
3655: as a PerlChildExitHandler
1.243 albertel 3656:
3657: =back
3658:
3659: =head2 Other
3660:
3661: =over 4
3662:
3663: =item *
3664:
3665: symblist($mapname,%newhash) : update symbolic storage links
1.191 harris41 3666:
3667: =back
3668:
3669: =cut
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