1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.262 2002/08/07 20:40:57 matthew Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 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
62: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
63: # 12/5 Matthew Hall
64: # 12/5 Guy Albertelli
65: # 12/6,12/7,12/12 Gerd Kortemeyer
66: # 12/18 Scott Harrison
67: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
68: # YEAR=2002
69: # 1/4,2/4,2/7 Gerd Kortemeyer
70: #
71: ###
72:
73: package Apache::lonnet;
74:
75: use strict;
76: use Apache::File;
77: use LWP::UserAgent();
78: use HTTP::Headers;
79: use vars
80: qw(%perlvar %hostname %homecache %badServerCache %hostip %spareid %hostdom
81: %libserv %pr %prp %metacache %packagetab
82: %courselogs %accesshash $processmarker $dumpcount
83: %coursedombuf %coursehombuf %courseresdatacache %domaindescription);
84: use IO::Socket;
85: use GDBM_File;
86: use Apache::Constants qw(:common :http);
87: use HTML::LCParser;
88: use Fcntl qw(:flock);
89: my $readit;
90:
91: # --------------------------------------------------------------------- Logging
92:
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:
103: sub logthis {
104: my $message=shift;
105: my $execdir=$perlvar{'lonDaemons'};
106: my $now=time;
107: my $local=localtime($now);
108: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
109: print $fh "$local ($$): $message\n";
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);
118: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
119: print $fh "$now:$message:$local\n";
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>;
133: if (!$answer) { $answer="con_lost"; }
134: chomp($answer);
135: return $answer;
136: }
137:
138: sub reply {
139: my ($cmd,$server)=@_;
140: unless (defined($hostname{$server})) { return 'no_such_host'; }
141: my $answer=subreply($cmd,$server);
142: if ($answer eq 'con_lost') {
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: #}
157: }
158: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
159: &logthis("<font color=blue>WARNING:".
160: " $cmd to $server returned $answer</font>");
161: }
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; }
182: &logthis(
183: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
184: } else {
185: &logthis(
186: "<font color=blue>WARNING:".
187: " lonc at pid $loncpid not responding, giving up</font>");
188: }
189: } else {
190: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
191: }
192: }
193:
194: # ------------------------------------------------------ Critical communication
195:
196: sub critical {
197: my ($cmd,$server)=@_;
198: unless ($hostname{$server}) {
199: &logthis("<font color=blue>WARNING:".
200: " Critical message to unknown server ($server)</font>");
201: return 'no_such_host';
202: }
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;
213: $middlename=substr($middlename,0,16);
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")) {
220: print $dfh "$cmd\n";
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);
232: if ($wcmd eq $cmd) {
233: &logthis("<font color=blue>WARNING: ".
234: "Connection buffer $dfilename: $cmd</font>");
235: &logperm("D:$server:$cmd");
236: return 'con_delayed';
237: } else {
238: &logthis("<font color=red>CRITICAL:"
239: ." Critical connection failed: $server $cmd</font>");
240: &logperm("F:$server:$cmd");
241: return 'con_failed';
242: }
243: }
244: }
245: return $answer;
246: }
247:
248: # ---------------------------------------------------------- Append Environment
249:
250: sub appenv {
251: my %newenv=@_;
252: foreach (keys %newenv) {
253: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
254: &logthis("<font color=blue>WARNING: ".
255: "Attempt to modify environment ".$_." to ".$newenv{$_}
256: .'</font>');
257: delete($newenv{$_});
258: } else {
259: $ENV{$_}=$newenv{$_};
260: }
261: }
262:
263: my $lockfh;
264: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
265: return 'error: '.$!;
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:
274: my @oldenv;
275: {
276: my $fh;
277: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
278: return 'error: '.$!;
279: }
280: @oldenv=<$fh>;
281: $fh->close();
282: }
283: for (my $i=0; $i<=$#oldenv; $i++) {
284: chomp($oldenv[$i]);
285: if ($oldenv[$i] ne '') {
286: my ($name,$value)=split(/=/,$oldenv[$i]);
287: unless (defined($newenv{$name})) {
288: $newenv{$name}=$value;
289: }
290: }
291: }
292: {
293: my $fh;
294: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
295: return 'error';
296: }
297: my $newname;
298: foreach $newname (keys %newenv) {
299: print $fh "$newname=$newenv{$newname}\n";
300: }
301: $fh->close();
302: }
303:
304: $lockfh->close();
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: }
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: }
329: @oldenv=<$fh>;
330: $fh->close();
331: }
332: {
333: my $fh;
334: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
335: return 'error';
336: }
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: }
343: foreach (@oldenv) {
344: unless ($_=~/^$delthis/) { print $fh $_; }
345: }
346: $fh->close();
347: }
348: return 'ok';
349: }
350:
351: # ------------------------------ Find server with least workload from spare.tab
352:
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;
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;
400: }
401:
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:
440: # --------- Try to authenticate user from domain's lib servers (first this one)
441:
442: sub authenticate {
443: my ($uname,$upass,$udom)=@_;
444: $upass=escape($upass);
445: $uname=~s/\W//g;
446: if (($perlvar{'lonRole'} eq 'library') &&
447: ($udom eq $perlvar{'lonDefDomain'})) {
448: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
449: if ($answer =~ /authorized/) {
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: }
458: }
459: }
460:
461: my $tryserver;
462: foreach $tryserver (keys %libserv) {
463: if ($hostdom{$tryserver} eq $udom) {
464: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
465: if ($answer =~ /authorized/) {
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: }
474: }
475: }
476: }
477: &logthis("User $uname at $udom could not be authenticated");
478: return 'no_host';
479: }
480:
481: # ---------------------- Find the homebase for a user from domain's lib servers
482:
483: sub homeserver {
484: my ($uname,$udom,$ignoreBadCache)=@_;
485: my $index="$uname:$udom";
486: if ($homecache{$index}) {
487: return "$homecache{$index}";
488: }
489: my $tryserver;
490: foreach $tryserver (keys %libserv) {
491: next if ($ignoreBadCache ne 'true' &&
492: exists($badServerCache{$tryserver}));
493: if ($hostdom{$tryserver} eq $udom) {
494: my $answer=reply("home:$udom:$uname",$tryserver);
495: if ($answer eq 'found') {
496: $homecache{$index}=$tryserver;
497: return $tryserver;
498: } elsif ($answer eq 'no_host') {
499: $badServerCache{$tryserver}=1;
500: }
501: }
502: }
503: return 'no_host';
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=();
519: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
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=();
538: foreach (@unames) {
539: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
540: }
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=();
549: foreach (keys %ids) {
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: }
562: }
563: foreach (keys %servers) {
564: &critical('idput:'.$udom.':'.$servers{$_},$_);
565: }
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/;
574: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
575: &homeserver($unam,$udom)))) {
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: }
592: }
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;
609: }
610:
611: # ----------------------------- Subscribe to a resource, return URL if possible
612:
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);
623: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
624: $answer.=' by '.$home;
625: }
626: return $answer;
627: }
628:
629: # -------------------------------------------------------------- Replicate file
630:
631: sub repcopy {
632: my $filename=shift;
633: $filename=~s/\/+/\//g;
634: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
635: my $transname="$filename.in.transfer";
636: if ((-e $filename) || (-e $transname)) { return OK; }
637: my $remoteurl=subscribe($filename);
638: if ($remoteurl =~ /^con_lost by/) {
639: &logthis("Subscribe returned $remoteurl: $filename");
640: return HTTP_SERVICE_UNAVAILABLE;
641: } elsif ($remoteurl eq 'not_found') {
642: &logthis("Subscribe returned not_found: $filename");
643: return HTTP_NOT_FOUND;
644: } elsif ($remoteurl =~ /^rejected by/) {
645: &logthis("Subscribe returned $remoteurl: $filename");
646: return FORBIDDEN;
647: } elsif ($remoteurl eq 'directory') {
648: return OK;
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;
669: &logthis("<font color=blue>WARNING:"
670: ." LWP get: $message: $filename</font>");
671: return HTTP_SERVICE_UNAVAILABLE;
672: } else {
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: }
682: rename($transname,$filename);
683: return OK;
684: }
685: }
686: }
687:
688: # --------------------------------------------------------- Server Side Include
689:
690: sub ssi {
691:
692: my ($fn,%form)=@_;
693:
694: my $ua=new LWP::UserAgent;
695:
696: my $request;
697:
698: if (%form) {
699: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
700: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
701: } else {
702: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
703: }
704:
705: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
706: my $response=$ua->request($request);
707:
708: return $response->content;
709: }
710:
711: # ------- Add a token to a remote URI's query string to vouch for access rights
712:
713: sub tokenwrapper {
714: my $uri=shift;
715: $uri=~s/^http\:\/\/([^\/]+)//;
716: $uri=~s/^\///;
717: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
718: my $token=$1;
719: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
720: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
721: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
722: (($uri=~/\?/)?'&':'?').'token='.$token;
723: } else {
724: return '/adm/notfound.html';
725: }
726: }
727:
728: # --------------- Take an uploaded file and put it into the userfiles directory
729: # input: name of form element, coursedoc=1 means this is for the course
730: # output: url of file in userspace
731:
732: sub userfileupload {
733: my ($formname,$coursedoc)=@_;
734: my $fname=$ENV{'form.'.$formname.'.filename'};
735: $fname=~s/\\/\//g;
736: $fname=~s/^.*\/([^\/]+)$/$1/;
737: unless ($fname) { return 'error: no uploaded file'; }
738: chop($ENV{'form.'.$formname});
739: # Create the directory if not present
740: my $docuname='';
741: my $docudom='';
742: my $docuhome='';
743: if ($coursedoc) {
744: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
745: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
746: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
747: } else {
748: $docuname=$ENV{'user.name'};
749: $docudom=$ENV{'user.domain'};
750: $docuhome=$ENV{'user.home'};
751: }
752: my $path=$docudom.'/'.$docuname.'/';
753: my $filepath=$perlvar{'lonDocRoot'};
754: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
755: my $count;
756: for ($count=4;$count<=$#parts;$count++) {
757: $filepath.="/$parts[$count]";
758: if ((-e $filepath)!=1) {
759: mkdir($filepath,0777);
760: }
761: }
762: # Save the file
763: {
764: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
765: print $fh $ENV{'form.'.$formname};
766: }
767: # Notify homeserver to grep it
768: #
769: # FIXME - this still needs to happen
770: #
771: # Return the URL to it
772: return '/uploaded/'.$path.$fname;
773: }
774:
775: # ------------------------------------------------------------------------- Log
776:
777: sub log {
778: my ($dom,$nam,$hom,$what)=@_;
779: return critical("log:$dom:$nam:$what",$hom);
780: }
781:
782: # ------------------------------------------------------------------ Course Log
783:
784: sub flushcourselogs {
785: &logthis('Flushing course log buffers');
786: foreach (keys %courselogs) {
787: my $crsid=$_;
788: if (&reply('log:'.$coursedombuf{$crsid}.':'.
789: &escape($courselogs{$crsid}),
790: $coursehombuf{$crsid}) eq 'ok') {
791: delete $courselogs{$crsid};
792: } else {
793: &logthis('Failed to flush log buffer for '.$crsid);
794: if (length($courselogs{$crsid})>40000) {
795: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
796: " exceeded maximum size, deleting.</font>");
797: delete $courselogs{$crsid};
798: }
799: }
800: }
801: &logthis('Flushing access logs');
802: foreach (keys %accesshash) {
803: my $entry=$_;
804: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
805: my %temphash=($entry => $accesshash{$entry});
806: if (&Apache::lonnet::put('resevaldata',\%temphash,$1,$2) eq 'ok') {
807: delete $accesshash{$entry};
808: }
809: }
810: $dumpcount++;
811: }
812:
813: sub courselog {
814: my $what=shift;
815: $what=time.':'.$what;
816: unless ($ENV{'request.course.id'}) { return ''; }
817: $coursedombuf{$ENV{'request.course.id'}}=
818: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
819: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
820: $coursehombuf{$ENV{'request.course.id'}}=
821: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
822: if (defined $courselogs{$ENV{'request.course.id'}}) {
823: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
824: } else {
825: $courselogs{$ENV{'request.course.id'}}.=$what;
826: }
827: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
828: &flushcourselogs();
829: }
830: }
831:
832: sub courseacclog {
833: my $fnsymb=shift;
834: unless ($ENV{'request.course.id'}) { return ''; }
835: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
836: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
837: $what.=':POST';
838: foreach (keys %ENV) {
839: if ($_=~/^form\.(.*)/) {
840: $what.=':'.$1.'='.$ENV{$_};
841: }
842: }
843: }
844: &courselog($what);
845: }
846:
847: sub countacc {
848: my $url=&declutter(shift);
849: unless ($ENV{'request.course.id'}) { return ''; }
850: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
851: my $key=$processmarker.'_'.$dumpcount.'___'.$url.'___count';
852: if (defined($accesshash{$key})) {
853: $accesshash{$key}++;
854: } else {
855: $accesshash{$key}=1;
856: }
857: }
858:
859: # ----------------------------------------------------------- Check out an item
860:
861: sub checkout {
862: my ($symb,$tuname,$tudom,$tcrsid)=@_;
863: my $now=time;
864: my $lonhost=$perlvar{'lonHostID'};
865: my $infostr=&escape(
866: 'CHECKOUTTOKEN&'.
867: $tuname.'&'.
868: $tudom.'&'.
869: $tcrsid.'&'.
870: $symb.'&'.
871: $now.'&'.$ENV{'REMOTE_ADDR'});
872: my $token=&reply('tmpput:'.$infostr,$lonhost);
873: if ($token=~/^error\:/) {
874: &logthis("<font color=blue>WARNING: ".
875: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
876: "</font>");
877: return '';
878: }
879:
880: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
881: $token=~tr/a-z/A-Z/;
882:
883: my %infohash=('resource.0.outtoken' => $token,
884: 'resource.0.checkouttime' => $now,
885: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
886:
887: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
888: return '';
889: } else {
890: &logthis("<font color=blue>WARNING: ".
891: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
892: "</font>");
893: }
894:
895: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
896: &escape('Checkout '.$infostr.' - '.
897: $token)) ne 'ok') {
898: return '';
899: } else {
900: &logthis("<font color=blue>WARNING: ".
901: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
902: "</font>");
903: }
904: return $token;
905: }
906:
907: # ------------------------------------------------------------ Check in an item
908:
909: sub checkin {
910: my $token=shift;
911: my $now=time;
912: my ($ta,$tb,$lonhost)=split(/\*/,$token);
913: $lonhost=~tr/A-Z/a-z/;
914: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
915: $dtoken=~s/\W/\_/g;
916: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
917: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
918:
919: unless (($tuname) && ($tudom)) {
920: &logthis('Check in '.$token.' ('.$dtoken.') failed');
921: return '';
922: }
923:
924: unless (&allowed('mgr',$tcrsid)) {
925: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
926: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
927: return '';
928: }
929:
930: my %infohash=('resource.0.intoken' => $token,
931: 'resource.0.checkintime' => $now,
932: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
933:
934: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
935: return '';
936: }
937:
938: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
939: &escape('Checkin - '.$token)) ne 'ok') {
940: return '';
941: }
942:
943: return ($symb,$tuname,$tudom,$tcrsid);
944: }
945:
946: # --------------------------------------------- Set Expire Date for Spreadsheet
947:
948: sub expirespread {
949: my ($uname,$udom,$stype,$usymb)=@_;
950: my $cid=$ENV{'request.course.id'};
951: if ($cid) {
952: my $now=time;
953: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
954: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
955: $ENV{'course.'.$cid.'.num'}.
956: ':nohist_expirationdates:'.
957: &escape($key).'='.$now,
958: $ENV{'course.'.$cid.'.home'})
959: }
960: return 'ok';
961: }
962:
963: # ----------------------------------------------------- Devalidate Spreadsheets
964:
965: sub devalidate {
966: my $symb=shift;
967: my $cid=$ENV{'request.course.id'};
968: if ($cid) {
969: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
970: my $status=
971: &del('nohist_calculatedsheet',
972: [$key.'studentcalc'],
973: $ENV{'course.'.$cid.'.domain'},
974: $ENV{'course.'.$cid.'.num'})
975: .' '.
976: &del('nohist_calculatedsheets_'.$cid,
977: [$key.'assesscalc:'.$symb]);
978: unless ($status eq 'ok ok') {
979: &logthis('Could not devalidate spreadsheet '.
980: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
981: $symb.': '.$status);
982: }
983: }
984: }
985:
986: sub arrayref2str {
987: my ($arrayref) = @_;
988: my $result='_ARRAY_REF__';
989: foreach my $elem (@$arrayref) {
990: if (ref($elem) eq 'ARRAY') {
991: $result.=&escape(&arrayref2str($elem)).'&';
992: } elsif (ref($elem) eq 'HASH') {
993: $result.=&escape(&hashref2str($elem)).'&';
994: } elsif (ref($elem)) {
995: &logthis("Got a ref of ".(ref($elem))." skipping.");
996: } else {
997: $result.=&escape($elem).'&';
998: }
999: }
1000: $result=~s/\&$//;
1001: return $result;
1002: }
1003:
1004: sub hash2str {
1005: my (%hash) = @_;
1006: my $result=&hashref2str(\%hash);
1007: $result=~s/^_HASH_REF__//;
1008: return $result;
1009: }
1010:
1011: sub hashref2str {
1012: my ($hashref)=@_;
1013: my $result='_HASH_REF__';
1014: foreach (keys(%$hashref)) {
1015: if (ref($_) eq 'ARRAY') {
1016: $result.=&escape(&arrayref2str($_)).'=';
1017: } elsif (ref($_) eq 'HASH') {
1018: $result.=&escape(&hashref2str($_)).'=';
1019: } elsif (ref($_)) {
1020: &logthis("Got a ref of ".(ref($_))." skipping.");
1021: } else {
1022: $result.=&escape($_).'=';
1023: }
1024:
1025: if (ref($$hashref{$_}) eq 'ARRAY') {
1026: $result.=&escape(&arrayref2str($$hashref{$_})).'&';
1027: } elsif (ref($$hashref{$_}) eq 'HASH') {
1028: $result.=&escape(&hashref2str($$hashref{$_})).'&';
1029: } elsif (ref($$hashref{$_})) {
1030: &logthis("Got a ref of ".(ref($$hashref{$_}))." skipping.");
1031: } else {
1032: $result.=&escape($$hashref{$_}).'&';
1033: }
1034: }
1035: $result=~s/\&$//;
1036: return $result;
1037: }
1038:
1039: sub str2hash {
1040: my ($string) = @_;
1041: my %returnhash;
1042: foreach (split(/\&/,$string)) {
1043: my ($name,$value)=split(/\=/,$_);
1044: $name=&unescape($name);
1045: $value=&unescape($value);
1046: if ($value =~ /^_HASH_REF__/) {
1047: $value =~ s/^_HASH_REF__//;
1048: my %hash=&str2hash($value);
1049: $value=\%hash;
1050: } elsif ($value =~ /^_ARRAY_REF__/) {
1051: $value =~ s/^_ARRAY_REF__//;
1052: my @array=&str2array($value);
1053: $value=\@array;
1054: }
1055: $returnhash{$name}=$value;
1056: }
1057: return (%returnhash);
1058: }
1059:
1060: sub str2array {
1061: my ($string) = @_;
1062: my @returnarray;
1063: foreach my $value (split(/\&/,$string)) {
1064: $value=&unescape($value);
1065: if ($value =~ /^_HASH_REF__/) {
1066: $value =~ s/^_HASH_REF__//;
1067: my %hash=&str2hash($value);
1068: $value=\%hash;
1069: } elsif ($value =~ /^_ARRAY_REF__/) {
1070: $value =~ s/^_ARRAY_REF__//;
1071: my @array=&str2array($value);
1072: $value=\@array;
1073: }
1074: push(@returnarray,$value);
1075: }
1076: return (@returnarray);
1077: }
1078:
1079: # -------------------------------------------------------------------Temp Store
1080:
1081: sub tmpreset {
1082: my ($symb,$namespace,$domain,$stuname) = @_;
1083: if (!$symb) {
1084: $symb=&symbread();
1085: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1086: }
1087: $symb=escape($symb);
1088:
1089: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1090: $namespace=~s/\//\_/g;
1091: $namespace=~s/\W//g;
1092:
1093: #FIXME needs to do something for /pub resources
1094: if (!$domain) { $domain=$ENV{'user.domain'}; }
1095: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1096: my $path=$perlvar{'lonDaemons'}.'/tmp';
1097: my %hash;
1098: if (tie(%hash,'GDBM_File',
1099: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1100: &GDBM_WRCREAT(),0640)) {
1101: foreach my $key (keys %hash) {
1102: if ($key=~ /:$symb/) {
1103: delete($hash{$key});
1104: }
1105: }
1106: }
1107: }
1108:
1109: sub tmpstore {
1110: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1111:
1112: if (!$symb) {
1113: $symb=&symbread();
1114: if (!$symb) { $symb= $ENV{'request.url'}; }
1115: }
1116: $symb=escape($symb);
1117:
1118: if (!$namespace) {
1119: # I don't think we would ever want to store this for a course.
1120: # it seems this will only be used if we don't have a course.
1121: #$namespace=$ENV{'request.course.id'};
1122: #if (!$namespace) {
1123: $namespace=$ENV{'request.state'};
1124: #}
1125: }
1126: $namespace=~s/\//\_/g;
1127: $namespace=~s/\W//g;
1128: #FIXME needs to do something for /pub resources
1129: if (!$domain) { $domain=$ENV{'user.domain'}; }
1130: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1131: my $now=time;
1132: my %hash;
1133: my $path=$perlvar{'lonDaemons'}.'/tmp';
1134: if (tie(%hash,'GDBM_File',
1135: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1136: &GDBM_WRCREAT(),0640)) {
1137: $hash{"version:$symb"}++;
1138: my $version=$hash{"version:$symb"};
1139: my $allkeys='';
1140: foreach my $key (keys(%$storehash)) {
1141: $allkeys.=$key.':';
1142: $hash{"$version:$symb:$key"}=$$storehash{$key};
1143: }
1144: $hash{"$version:$symb:timestamp"}=$now;
1145: $allkeys.='timestamp';
1146: $hash{"$version:keys:$symb"}=$allkeys;
1147: if (untie(%hash)) {
1148: return 'ok';
1149: } else {
1150: return "error:$!";
1151: }
1152: } else {
1153: return "error:$!";
1154: }
1155: }
1156:
1157: # -----------------------------------------------------------------Temp Restore
1158:
1159: sub tmprestore {
1160: my ($symb,$namespace,$domain,$stuname) = @_;
1161:
1162: if (!$symb) {
1163: $symb=&symbread();
1164: if (!$symb) { $symb= $ENV{'request.url'}; }
1165: }
1166: $symb=escape($symb);
1167:
1168: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1169: #FIXME needs to do something for /pub resources
1170: if (!$domain) { $domain=$ENV{'user.domain'}; }
1171: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1172:
1173: my %returnhash;
1174: $namespace=~s/\//\_/g;
1175: $namespace=~s/\W//g;
1176: my %hash;
1177: my $path=$perlvar{'lonDaemons'}.'/tmp';
1178: if (tie(%hash,'GDBM_File',
1179: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1180: &GDBM_READER(),0640)) {
1181: my $version=$hash{"version:$symb"};
1182: $returnhash{'version'}=$version;
1183: my $scope;
1184: for ($scope=1;$scope<=$version;$scope++) {
1185: my $vkeys=$hash{"$scope:keys:$symb"};
1186: my @keys=split(/:/,$vkeys);
1187: my $key;
1188: $returnhash{"$scope:keys"}=$vkeys;
1189: foreach $key (@keys) {
1190: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1191: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1192: }
1193: }
1194: if (!(untie(%hash))) {
1195: return "error:$!";
1196: }
1197: } else {
1198: return "error:$!";
1199: }
1200: return %returnhash;
1201: }
1202:
1203: # ----------------------------------------------------------------------- Store
1204:
1205: sub store {
1206: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1207: my $home='';
1208:
1209: if ($stuname) { $home=&homeserver($stuname,$domain); }
1210:
1211: $symb=&symbclean($symb);
1212: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1213:
1214: &devalidate($symb);
1215:
1216: $symb=escape($symb);
1217: if (!$namespace) {
1218: unless ($namespace=$ENV{'request.course.id'}) {
1219: return '';
1220: }
1221: }
1222: if (!$domain) { $domain=$ENV{'user.domain'}; }
1223: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1224: if (!$home) { $home=$ENV{'user.home'}; }
1225: my $namevalue='';
1226: foreach (keys %$storehash) {
1227: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1228: }
1229: $namevalue=~s/\&$//;
1230: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1231: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1232: }
1233:
1234: # -------------------------------------------------------------- Critical Store
1235:
1236: sub cstore {
1237: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1238: my $home='';
1239:
1240: if ($stuname) { $home=&homeserver($stuname,$domain); }
1241:
1242: $symb=&symbclean($symb);
1243: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1244:
1245: &devalidate($symb);
1246:
1247: $symb=escape($symb);
1248: if (!$namespace) {
1249: unless ($namespace=$ENV{'request.course.id'}) {
1250: return '';
1251: }
1252: }
1253: if (!$domain) { $domain=$ENV{'user.domain'}; }
1254: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1255: if (!$home) { $home=$ENV{'user.home'}; }
1256:
1257: my $namevalue='';
1258: foreach (keys %$storehash) {
1259: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1260: }
1261: $namevalue=~s/\&$//;
1262: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1263: return critical
1264: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1265: }
1266:
1267: # --------------------------------------------------------------------- Restore
1268:
1269: sub restore {
1270: my ($symb,$namespace,$domain,$stuname) = @_;
1271: my $home='';
1272:
1273: if ($stuname) { $home=&homeserver($stuname,$domain); }
1274:
1275: if (!$symb) {
1276: unless ($symb=escape(&symbread())) { return ''; }
1277: } else {
1278: $symb=&escape(&symbclean($symb));
1279: }
1280: if (!$namespace) {
1281: unless ($namespace=$ENV{'request.course.id'}) {
1282: return '';
1283: }
1284: }
1285: if (!$domain) { $domain=$ENV{'user.domain'}; }
1286: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1287: if (!$home) { $home=$ENV{'user.home'}; }
1288: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1289:
1290: my %returnhash=();
1291: foreach (split(/\&/,$answer)) {
1292: my ($name,$value)=split(/\=/,$_);
1293: $returnhash{&unescape($name)}=&unescape($value);
1294: }
1295: my $version;
1296: for ($version=1;$version<=$returnhash{'version'};$version++) {
1297: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1298: $returnhash{$_}=$returnhash{$version.':'.$_};
1299: }
1300: }
1301: return %returnhash;
1302: }
1303:
1304: # ---------------------------------------------------------- Course Description
1305:
1306: sub coursedescription {
1307: my $courseid=shift;
1308: $courseid=~s/^\///;
1309: $courseid=~s/\_/\//g;
1310: my ($cdomain,$cnum)=split(/\//,$courseid);
1311: my $chome=&homeserver($cnum,$cdomain);
1312: if ($chome ne 'no_host') {
1313: my %returnhash=&dump('environment',$cdomain,$cnum);
1314: if (!exists($returnhash{'con_lost'})) {
1315: my $normalid=$cdomain.'_'.$cnum;
1316: my %envhash=();
1317: $returnhash{'home'}= $chome;
1318: $returnhash{'domain'} = $cdomain;
1319: $returnhash{'num'} = $cnum;
1320: while (my ($name,$value) = each %returnhash) {
1321: $envhash{'course.'.$normalid.'.'.$name}=$value;
1322: }
1323: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1324: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1325: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1326: $envhash{'course.'.$normalid.'.last_cache'}=time;
1327: $envhash{'course.'.$normalid.'.home'}=$chome;
1328: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1329: $envhash{'course.'.$normalid.'.num'}=$cnum;
1330: &appenv(%envhash);
1331: return %returnhash;
1332: }
1333: }
1334: return ();
1335: }
1336:
1337: # -------------------------------------------------------- Get user privileges
1338:
1339: sub rolesinit {
1340: my ($domain,$username,$authhost)=@_;
1341: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1342: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1343: my %allroles=();
1344: my %thesepriv=();
1345: my $now=time;
1346: my $userroles="user.login.time=$now\n";
1347: my $thesestr;
1348:
1349: if ($rolesdump ne '') {
1350: foreach (split(/&/,$rolesdump)) {
1351: if ($_!~/^rolesdef\&/) {
1352: my ($area,$role)=split(/=/,$_);
1353: $area=~s/\_\w\w$//;
1354: my ($trole,$tend,$tstart)=split(/_/,$role);
1355: $userroles.='user.role.'.$trole.'.'.$area.'='.
1356: $tstart.'.'.$tend."\n";
1357: if ($tend!=0) {
1358: if ($tend<$now) {
1359: $trole='';
1360: }
1361: }
1362: if ($tstart!=0) {
1363: if ($tstart>$now) {
1364: $trole='';
1365: }
1366: }
1367: if (($area ne '') && ($trole ne '')) {
1368: my $spec=$trole.'.'.$area;
1369: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1370: if ($trole =~ /^cr\//) {
1371: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1372: my $homsvr=homeserver($rauthor,$rdomain);
1373: if ($hostname{$homsvr} ne '') {
1374: my $roledef=
1375: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1376: $homsvr);
1377: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1378: my ($syspriv,$dompriv,$coursepriv)=
1379: split(/\_/,unescape($roledef));
1380: $allroles{'cm./'}.=':'.$syspriv;
1381: $allroles{$spec.'./'}.=':'.$syspriv;
1382: if ($tdomain ne '') {
1383: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1384: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1385: if ($trest ne '') {
1386: $allroles{'cm.'.$area}.=':'.$coursepriv;
1387: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1388: }
1389: }
1390: }
1391: }
1392: } else {
1393: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1394: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1395: if ($tdomain ne '') {
1396: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1397: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1398: if ($trest ne '') {
1399: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1400: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1401: }
1402: }
1403: }
1404: }
1405: }
1406: }
1407: my $adv=0;
1408: my $author=0;
1409: foreach (keys %allroles) {
1410: %thesepriv=();
1411: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1412: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1413: foreach (split(/:/,$allroles{$_})) {
1414: if ($_ ne '') {
1415: my ($privilege,$restrictions)=split(/&/,$_);
1416: if ($restrictions eq '') {
1417: $thesepriv{$privilege}='F';
1418: } else {
1419: if ($thesepriv{$privilege} ne 'F') {
1420: $thesepriv{$privilege}.=$restrictions;
1421: }
1422: }
1423: }
1424: }
1425: $thesestr='';
1426: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1427: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1428: }
1429: $userroles.='user.adv='.$adv."\n".
1430: 'user.author='.$author."\n";
1431: $ENV{'user.adv'}=$adv;
1432: }
1433: return $userroles;
1434: }
1435:
1436: # --------------------------------------------------------------- get interface
1437:
1438: sub get {
1439: my ($namespace,$storearr,$udomain,$uname)=@_;
1440: my $items='';
1441: foreach (@$storearr) {
1442: $items.=escape($_).'&';
1443: }
1444: $items=~s/\&$//;
1445: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1446: if (!$uname) { $uname=$ENV{'user.name'}; }
1447: my $uhome=&homeserver($uname,$udomain);
1448:
1449: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1450: my @pairs=split(/\&/,$rep);
1451: my %returnhash=();
1452: my $i=0;
1453: foreach (@$storearr) {
1454: $returnhash{$_}=unescape($pairs[$i]);
1455: $i++;
1456: }
1457: return %returnhash;
1458: }
1459:
1460: # --------------------------------------------------------------- del interface
1461:
1462: sub del {
1463: my ($namespace,$storearr,$udomain,$uname)=@_;
1464: my $items='';
1465: foreach (@$storearr) {
1466: $items.=escape($_).'&';
1467: }
1468: $items=~s/\&$//;
1469: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1470: if (!$uname) { $uname=$ENV{'user.name'}; }
1471: my $uhome=&homeserver($uname,$udomain);
1472:
1473: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1474: }
1475:
1476: # -------------------------------------------------------------- dump interface
1477:
1478: sub dump {
1479: my ($namespace,$udomain,$uname,$regexp)=@_;
1480: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1481: if (!$uname) { $uname=$ENV{'user.name'}; }
1482: my $uhome=&homeserver($uname,$udomain);
1483: if ($regexp) {
1484: $regexp=&escape($regexp);
1485: } else {
1486: $regexp='.';
1487: }
1488: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1489: my @pairs=split(/\&/,$rep);
1490: my %returnhash=();
1491: foreach (@pairs) {
1492: my ($key,$value)=split(/=/,$_);
1493: $returnhash{unescape($key)}=unescape($value);
1494: }
1495: return %returnhash;
1496: }
1497:
1498: # --------------------------------------------------------------- put interface
1499:
1500: sub put {
1501: my ($namespace,$storehash,$udomain,$uname)=@_;
1502: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1503: if (!$uname) { $uname=$ENV{'user.name'}; }
1504: my $uhome=&homeserver($uname,$udomain);
1505: my $items='';
1506: foreach (keys %$storehash) {
1507: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1508: }
1509: $items=~s/\&$//;
1510: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1511: }
1512:
1513: # ------------------------------------------------------ critical put interface
1514:
1515: sub cput {
1516: my ($namespace,$storehash,$udomain,$uname)=@_;
1517: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1518: if (!$uname) { $uname=$ENV{'user.name'}; }
1519: my $uhome=&homeserver($uname,$udomain);
1520: my $items='';
1521: foreach (keys %$storehash) {
1522: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1523: }
1524: $items=~s/\&$//;
1525: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1526: }
1527:
1528: # -------------------------------------------------------------- eget interface
1529:
1530: sub eget {
1531: my ($namespace,$storearr,$udomain,$uname)=@_;
1532: my $items='';
1533: foreach (@$storearr) {
1534: $items.=escape($_).'&';
1535: }
1536: $items=~s/\&$//;
1537: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1538: if (!$uname) { $uname=$ENV{'user.name'}; }
1539: my $uhome=&homeserver($uname,$udomain);
1540: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1541: my @pairs=split(/\&/,$rep);
1542: my %returnhash=();
1543: my $i=0;
1544: foreach (@$storearr) {
1545: $returnhash{$_}=unescape($pairs[$i]);
1546: $i++;
1547: }
1548: return %returnhash;
1549: }
1550:
1551: # ------------------------------------------------- Check for a user privilege
1552:
1553: sub allowed {
1554: my ($priv,$uri)=@_;
1555:
1556: my $orguri=$uri;
1557: $uri=&declutter($uri);
1558:
1559: # Free bre access to adm and meta resources
1560:
1561: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1562: return 'F';
1563: }
1564:
1565: # Free bre to public access
1566:
1567: if ($priv eq 'bre') {
1568: my $copyright=&metadata($uri,'copyright');
1569: if ($copyright eq 'public') { return 'F'; }
1570: if ($copyright eq 'priv') {
1571: $uri=~/([^\/]+)\/([^\/]+)\//;
1572: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
1573: return '';
1574: }
1575: }
1576: if ($copyright eq 'domain') {
1577: $uri=~/([^\/]+)\/([^\/]+)\//;
1578: unless (($ENV{'user.domain'} eq $1) ||
1579: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
1580: return '';
1581: }
1582: }
1583: if ($ENV{'request.role'}=~ /li\.\//) {
1584: # Library role, so allow browsing of resources in this domain.
1585: return 'F';
1586: }
1587: }
1588:
1589: my $thisallowed='';
1590: my $statecond=0;
1591: my $courseprivid='';
1592:
1593: # Course
1594:
1595: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1596: $thisallowed.=$1;
1597: }
1598:
1599: # Domain
1600:
1601: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1602: =~/$priv\&([^\:]*)/) {
1603: $thisallowed.=$1;
1604: }
1605:
1606: # Course: uri itself is a course
1607: my $courseuri=$uri;
1608: $courseuri=~s/\_(\d)/\/$1/;
1609: $courseuri=~s/^([^\/])/\/$1/;
1610:
1611: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1612: =~/$priv\&([^\:]*)/) {
1613: $thisallowed.=$1;
1614: }
1615:
1616: # Full access at system, domain or course-wide level? Exit.
1617:
1618: if ($thisallowed=~/F/) {
1619: return 'F';
1620: }
1621:
1622: # If this is generating or modifying users, exit with special codes
1623:
1624: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1625: return $thisallowed;
1626: }
1627: #
1628: # Gathered so far: system, domain and course wide privileges
1629: #
1630: # Course: See if uri or referer is an individual resource that is part of
1631: # the course
1632:
1633: if ($ENV{'request.course.id'}) {
1634:
1635: $courseprivid=$ENV{'request.course.id'};
1636: if ($ENV{'request.course.sec'}) {
1637: $courseprivid.='/'.$ENV{'request.course.sec'};
1638: }
1639: $courseprivid=~s/\_/\//;
1640: my $checkreferer=1;
1641: my ($match,$cond)=&is_on_map($uri);
1642: if ($match) {
1643: $statecond=$cond;
1644: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1645: =~/$priv\&([^\:]*)/) {
1646: $thisallowed.=$1;
1647: $checkreferer=0;
1648: }
1649: }
1650:
1651: if ($checkreferer) {
1652: my $refuri=$ENV{'httpref.'.$orguri};
1653: unless ($refuri) {
1654: foreach (keys %ENV) {
1655: if ($_=~/^httpref\..*\*/) {
1656: my $pattern=$_;
1657: $pattern=~s/^httpref\.\/res\///;
1658: $pattern=~s/\*/\[\^\/\]\+/g;
1659: $pattern=~s/\//\\\//g;
1660: if ($orguri=~/$pattern/) {
1661: $refuri=$ENV{$_};
1662: }
1663: }
1664: }
1665: }
1666:
1667: if ($refuri) {
1668: $refuri=&declutter($refuri);
1669: my ($match,$cond)=&is_on_map($refuri);
1670: if ($match) {
1671: my $refstatecond=$cond;
1672: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1673: =~/$priv\&([^\:]*)/) {
1674: $thisallowed.=$1;
1675: $uri=$refuri;
1676: $statecond=$refstatecond;
1677: }
1678: }
1679: }
1680: }
1681: }
1682:
1683: #
1684: # Gathered now: all privileges that could apply, and condition number
1685: #
1686: #
1687: # Full or no access?
1688: #
1689:
1690: if ($thisallowed=~/F/) {
1691: return 'F';
1692: }
1693:
1694: unless ($thisallowed) {
1695: return '';
1696: }
1697:
1698: # Restrictions exist, deal with them
1699: #
1700: # C:according to course preferences
1701: # R:according to resource settings
1702: # L:unless locked
1703: # X:according to user session state
1704: #
1705:
1706: # Possibly locked functionality, check all courses
1707: # Locks might take effect only after 10 minutes cache expiration for other
1708: # courses, and 2 minutes for current course
1709:
1710: my $envkey;
1711: if ($thisallowed=~/L/) {
1712: foreach $envkey (keys %ENV) {
1713: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1714: my $courseid=$2;
1715: my $roleid=$1.'.'.$2;
1716: $courseid=~s/^\///;
1717: my $expiretime=600;
1718: if ($ENV{'request.role'} eq $roleid) {
1719: $expiretime=120;
1720: }
1721: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1722: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1723: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1724: &coursedescription($courseid);
1725: }
1726: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1727: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1728: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1729: &log($ENV{'user.domain'},$ENV{'user.name'},
1730: $ENV{'user.home'},
1731: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1732: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1733: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1734: return '';
1735: }
1736: }
1737: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1738: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1739: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1740: &log($ENV{'user.domain'},$ENV{'user.name'},
1741: $ENV{'user.home'},
1742: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1743: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1744: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1745: return '';
1746: }
1747: }
1748: }
1749: }
1750: }
1751:
1752: #
1753: # Rest of the restrictions depend on selected course
1754: #
1755:
1756: unless ($ENV{'request.course.id'}) {
1757: return '1';
1758: }
1759:
1760: #
1761: # Now user is definitely in a course
1762: #
1763:
1764:
1765: # Course preferences
1766:
1767: if ($thisallowed=~/C/) {
1768: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1769: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
1770: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1771: =~/$rolecode/) {
1772: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1773: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1774: $ENV{'request.course.id'});
1775: return '';
1776: }
1777:
1778: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
1779: =~/$unamedom/) {
1780: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1781: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
1782: $ENV{'request.course.id'});
1783: return '';
1784: }
1785: }
1786:
1787: # Resource preferences
1788:
1789: if ($thisallowed=~/R/) {
1790: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1791: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1792: if (-e $filename) {
1793: my @content;
1794: {
1795: my $fh=Apache::File->new($filename);
1796: @content=<$fh>;
1797: }
1798: if (join('',@content)=~
1799: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1800: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1801: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1802: return '';
1803:
1804: }
1805: }
1806: }
1807:
1808: # Restricted by state or randomout?
1809:
1810: if ($thisallowed=~/X/) {
1811: if ($ENV{'acc.randomout'}) {
1812: my $symb=&symbread($uri,1);
1813: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
1814: return '';
1815: }
1816: }
1817: if (&condval($statecond)) {
1818: return '2';
1819: } else {
1820: return '';
1821: }
1822: }
1823:
1824: return 'F';
1825: }
1826:
1827: # --------------------------------------------------- Is a resource on the map?
1828:
1829: sub is_on_map {
1830: my $uri=&declutter(shift);
1831: my @uriparts=split(/\//,$uri);
1832: my $filename=$uriparts[$#uriparts];
1833: my $pathname=$uri;
1834: $pathname=~s/\/$filename$//;
1835: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1836: /\&$filename\:([\d\|]+)\&/);
1837: if ($match) {
1838: return (1,$1);
1839: } else {
1840: return (0,0);
1841: }
1842: }
1843:
1844: # ----------------------------------------------------------------- Define Role
1845:
1846: sub definerole {
1847: if (allowed('mcr','/')) {
1848: my ($rolename,$sysrole,$domrole,$courole)=@_;
1849: foreach (split('/',$sysrole)) {
1850: my ($crole,$cqual)=split(/\&/,$_);
1851: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1852: if ($pr{'cr:s'}=~/$crole\&/) {
1853: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1854: return "refused:s:$crole&$cqual";
1855: }
1856: }
1857: }
1858: foreach (split('/',$domrole)) {
1859: my ($crole,$cqual)=split(/\&/,$_);
1860: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1861: if ($pr{'cr:d'}=~/$crole\&/) {
1862: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1863: return "refused:d:$crole&$cqual";
1864: }
1865: }
1866: }
1867: foreach (split('/',$courole)) {
1868: my ($crole,$cqual)=split(/\&/,$_);
1869: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1870: if ($pr{'cr:c'}=~/$crole\&/) {
1871: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1872: return "refused:c:$crole&$cqual";
1873: }
1874: }
1875: }
1876: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1877: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1878: "rolesdef_$rolename=".
1879: escape($sysrole.'_'.$domrole.'_'.$courole);
1880: return reply($command,$ENV{'user.home'});
1881: } else {
1882: return 'refused';
1883: }
1884: }
1885:
1886: # ---------------- Make a metadata query against the network of library servers
1887:
1888: sub metadata_query {
1889: my ($query,$custom,$customshow,$server_array)=@_;
1890: my %rhash;
1891: my @server_list = (defined($server_array) ? @$server_array
1892: : keys(%libserv) );
1893: for my $server (@server_list) {
1894: unless ($custom or $customshow) {
1895: my $reply=&reply("querysend:".&escape($query),$server);
1896: $rhash{$server}=$reply;
1897: }
1898: else {
1899: my $reply=&reply("querysend:".&escape($query).':'.
1900: &escape($custom).':'.&escape($customshow),
1901: $server);
1902: $rhash{$server}=$reply;
1903: }
1904: }
1905: return \%rhash;
1906: }
1907:
1908: # ----------------------------------------- Send log queries and wait for reply
1909:
1910: sub log_query {
1911: my ($uname,$udom,$query,%filters)=@_;
1912: my $uhome=&homeserver($uname,$udom);
1913: if ($uhome eq 'no_host') { return 'error: no_host'; }
1914: my $uhost=$hostname{$uhome};
1915: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
1916: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
1917: $uhome);
1918: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
1919: return get_query_reply($queryid);
1920: }
1921:
1922: sub get_query_reply {
1923: my $queryid=shift;
1924: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
1925: my $reply='';
1926: for (1..100) {
1927: sleep 2;
1928: if (-e $replyfile.'.end') {
1929: if (my $fh=Apache::File->new($replyfile)) {
1930: $reply.=<$fh>;
1931: $fh->close;
1932: } else { return 'error: reply_file_error'; }
1933: return &unescape($reply);
1934: }
1935: }
1936: return 'timeout:'.$queryid;
1937: }
1938:
1939: sub courselog_query {
1940: #
1941: # possible filters:
1942: # url: url or symb
1943: # username
1944: # domain
1945: # action: view, submit, grade
1946: # start: timestamp
1947: # end: timestamp
1948: #
1949: my (%filters)=@_;
1950: unless ($ENV{'request.course.id'}) { return 'no_course'; }
1951: if ($filters{'url'}) {
1952: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
1953: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
1954: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
1955: }
1956: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1957: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1958: return &log_query($cname,$cdom,'courselog',%filters);
1959: }
1960:
1961: sub userlog_query {
1962: my ($uname,$udom,%filters)=@_;
1963: return &log_query($uname,$udom,'userlog',%filters);
1964: }
1965:
1966: # ------------------------------------------------------------------ Plain Text
1967:
1968: sub plaintext {
1969: my $short=shift;
1970: return $prp{$short};
1971: }
1972:
1973: # ----------------------------------------------------------------- Assign Role
1974:
1975: sub assignrole {
1976: my ($udom,$uname,$url,$role,$end,$start)=@_;
1977: my $mrole;
1978: if ($role =~ /^cr\//) {
1979: unless (&allowed('ccr',$url)) {
1980: &logthis('Refused custom assignrole: '.
1981: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1982: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1983: return 'refused';
1984: }
1985: $mrole='cr';
1986: } else {
1987: my $cwosec=$url;
1988: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1989: unless (&allowed('c'.$role,$cwosec)) {
1990: &logthis('Refused assignrole: '.
1991: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1992: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1993: return 'refused';
1994: }
1995: $mrole=$role;
1996: }
1997: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1998: "$udom:$uname:$url".'_'."$mrole=$role";
1999: if ($end) { $command.='_'.$end; }
2000: if ($start) {
2001: if ($end) {
2002: $command.='_'.$start;
2003: } else {
2004: $command.='_0_'.$start;
2005: }
2006: }
2007: return &reply($command,&homeserver($uname,$udom));
2008: }
2009:
2010: # -------------------------------------------------- Modify user authentication
2011: # Overrides without validation
2012:
2013: sub modifyuserauth {
2014: my ($udom,$uname,$umode,$upass)=@_;
2015: my $uhome=&homeserver($uname,$udom);
2016: unless (&allowed('mau',$udom)) { return 'refused'; }
2017: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2018: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
2019: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2020: &escape($upass),$uhome);
2021: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2022: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2023: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2024: &log($udom,,$uname,$uhome,
2025: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2026: $ENV{'user.name'}.', '.$umode.
2027: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2028: unless ($reply eq 'ok') {
2029: &logthis('Authentication mode error: '.$reply);
2030: return 'error: '.$reply;
2031: }
2032: return 'ok';
2033: }
2034:
2035: # --------------------------------------------------------------- Modify a user
2036:
2037: sub modifyuser {
2038: my ($udom, $uname, $uid,
2039: $umode, $upass, $first,
2040: $middle, $last, $gene,
2041: $forceid, $desiredhome)=@_;
2042: $udom=~s/\W//g;
2043: $uname=~s/\W//g;
2044: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2045: $umode.', '.$first.', '.$middle.', '.
2046: $last.', '.$gene.'(forceid: '.$forceid.')'.
2047: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2048: ' desiredhome not specified').
2049: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
2050: my $uhome=&homeserver($uname,$udom,'true');
2051: # ----------------------------------------------------------------- Create User
2052: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2053: my $unhome='';
2054: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2055: $unhome = $desiredhome;
2056: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2057: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2058: } else { # load balancing routine for determining $unhome
2059: my $tryserver;
2060: my $loadm=10000000;
2061: foreach $tryserver (keys %libserv) {
2062: if ($hostdom{$tryserver} eq $udom) {
2063: my $answer=reply('load',$tryserver);
2064: if (($answer=~/\d+/) && ($answer<$loadm)) {
2065: $loadm=$answer;
2066: $unhome=$tryserver;
2067: }
2068: }
2069: }
2070: }
2071: if (($unhome eq '') || ($unhome eq 'no_host')) {
2072: return 'error: unable to find a home server for '.$uname.
2073: ' in domain '.$udom;
2074: }
2075: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2076: &escape($upass),$unhome);
2077: unless ($reply eq 'ok') {
2078: return 'error: '.$reply;
2079: }
2080: $uhome=&homeserver($uname,$udom,'true');
2081: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2082: return 'error: verify home';
2083: }
2084: } # End of creation of new user
2085: # ---------------------------------------------------------------------- Add ID
2086: if ($uid) {
2087: $uid=~tr/A-Z/a-z/;
2088: my %uidhash=&idrget($udom,$uname);
2089: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2090: && (!$forceid)) {
2091: unless ($uid eq $uidhash{$uname}) {
2092: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2093: }
2094: } else {
2095: &idput($udom,($uname => $uid));
2096: }
2097: }
2098: # -------------------------------------------------------------- Add names, etc
2099: my %names=&get('environment',
2100: ['firstname','middlename','lastname','generation'],
2101: $udom,$uname);
2102: if ($names{'firstname'} =~ m/^error:.*/) { %names=(); }
2103: if ($first) { $names{'firstname'} = $first; }
2104: if ($middle) { $names{'middlename'} = $middle; }
2105: if ($last) { $names{'lastname'} = $last; }
2106: if ($gene) { $names{'generation'} = $gene; }
2107: my $reply = &put('environment', \%names, $udom,$uname);
2108: if ($reply ne 'ok') { return 'error: '.$reply; }
2109: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2110: $umode.', '.$first.', '.$middle.', '.
2111: $last.', '.$gene.' by '.
2112: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2113: return 'ok';
2114: }
2115:
2116: # -------------------------------------------------------------- Modify student
2117:
2118: sub modifystudent {
2119: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2120: $end,$start,$forceid,$desiredhome)=@_;
2121: my $cid='';
2122: unless ($cid=$ENV{'request.course.id'}) {
2123: return 'not_in_class';
2124: }
2125: # --------------------------------------------------------------- Make the user
2126: my $reply=&modifyuser
2127: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2128: $desiredhome);
2129: unless ($reply eq 'ok') { return $reply; }
2130: my $uhome=&homeserver($uname,$udom);
2131: if (($uhome eq '') || ($uhome eq 'no_host')) {
2132: return 'error: no such user';
2133: }
2134: # -------------------------------------------------- Add student to course list
2135: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2136: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2137: &escape($uname.':'.$udom).'='.
2138: &escape($end.':'.$start),
2139: $ENV{'course.'.$cid.'.home'});
2140: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2141: return 'error: '.$reply;
2142: }
2143: # ---------------------------------------------------- Add student role to user
2144: my $uurl='/'.$cid;
2145: $uurl=~s/\_/\//g;
2146: if ($usec) {
2147: $uurl.='/'.$usec;
2148: }
2149: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2150: }
2151:
2152: # ------------------------------------------------- Write to course preferences
2153:
2154: sub writecoursepref {
2155: my ($courseid,%prefs)=@_;
2156: $courseid=~s/^\///;
2157: $courseid=~s/\_/\//g;
2158: my ($cdomain,$cnum)=split(/\//,$courseid);
2159: my $chome=homeserver($cnum,$cdomain);
2160: if (($chome eq '') || ($chome eq 'no_host')) {
2161: return 'error: no such course';
2162: }
2163: my $cstring='';
2164: foreach (keys %prefs) {
2165: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2166: }
2167: $cstring=~s/\&$//;
2168: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2169: }
2170:
2171: # ---------------------------------------------------------- Make/modify course
2172:
2173: sub createcourse {
2174: my ($udom,$description,$url)=@_;
2175: $url=&declutter($url);
2176: my $cid='';
2177: unless (&allowed('ccc',$ENV{'user.domain'})) {
2178: return 'refused';
2179: }
2180: unless ($udom eq $ENV{'user.domain'}) {
2181: return 'refused';
2182: }
2183: # ------------------------------------------------------------------- Create ID
2184: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2185: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2186: # ----------------------------------------------- Make sure that does not exist
2187: my $uhome=&homeserver($uname,$udom,'true');
2188: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2189: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2190: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2191: $uhome=&homeserver($uname,$udom,'true');
2192: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2193: return 'error: unable to generate unique course-ID';
2194: }
2195: }
2196: # ------------------------------------------------------------- Make the course
2197: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2198: $ENV{'user.home'});
2199: unless ($reply eq 'ok') { return 'error: '.$reply; }
2200: $uhome=&homeserver($uname,$udom,'true');
2201: if (($uhome eq '') || ($uhome eq 'no_host')) {
2202: return 'error: no such course';
2203: }
2204: &writecoursepref($udom.'_'.$uname,
2205: ('description' => $description,
2206: 'url' => $url));
2207: return '/'.$udom.'/'.$uname;
2208: }
2209:
2210: # ---------------------------------------------------------- Assign Custom Role
2211:
2212: sub assigncustomrole {
2213: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2214: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2215: $end,$start);
2216: }
2217:
2218: # ----------------------------------------------------------------- Revoke Role
2219:
2220: sub revokerole {
2221: my ($udom,$uname,$url,$role)=@_;
2222: my $now=time;
2223: return &assignrole($udom,$uname,$url,$role,$now);
2224: }
2225:
2226: # ---------------------------------------------------------- Revoke Custom Role
2227:
2228: sub revokecustomrole {
2229: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2230: my $now=time;
2231: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2232: }
2233:
2234: # ------------------------------------------------------------ Directory lister
2235:
2236: sub dirlist {
2237: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2238:
2239: $uri=~s/^\///;
2240: $uri=~s/\/$//;
2241: my ($udom, $uname);
2242: (undef,$udom,$uname)=split(/\//,$uri);
2243: if(defined($userdomain)) {
2244: $udom = $userdomain;
2245: }
2246: if(defined($username)) {
2247: $uname = $username;
2248: }
2249:
2250: my $dirRoot = $perlvar{'lonDocRoot'};
2251: if(defined($alternateDirectoryRoot)) {
2252: $dirRoot = $alternateDirectoryRoot;
2253: $dirRoot =~ s/\/$//;
2254: }
2255:
2256: if($udom) {
2257: if($uname) {
2258: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2259: homeserver($uname,$udom));
2260: return split(/:/,$listing);
2261: } elsif(!defined($alternateDirectoryRoot)) {
2262: my $tryserver;
2263: my %allusers=();
2264: foreach $tryserver (keys %libserv) {
2265: if($hostdom{$tryserver} eq $udom) {
2266: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2267: $udom, $tryserver);
2268: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2269: && ($listing ne 'con_lost')) {
2270: foreach (split(/:/,$listing)) {
2271: my ($entry,@stat)=split(/&/,$_);
2272: $allusers{$entry}=1;
2273: }
2274: }
2275: }
2276: }
2277: my $alluserstr='';
2278: foreach (sort keys %allusers) {
2279: $alluserstr.=$_.'&user:';
2280: }
2281: $alluserstr=~s/:$//;
2282: return split(/:/,$alluserstr);
2283: } else {
2284: my @emptyResults = ();
2285: push(@emptyResults, 'missing user name');
2286: return split(':',@emptyResults);
2287: }
2288: } elsif(!defined($alternateDirectoryRoot)) {
2289: my $tryserver;
2290: my %alldom=();
2291: foreach $tryserver (keys %libserv) {
2292: $alldom{$hostdom{$tryserver}}=1;
2293: }
2294: my $alldomstr='';
2295: foreach (sort keys %alldom) {
2296: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2297: }
2298: $alldomstr=~s/:$//;
2299: return split(/:/,$alldomstr);
2300: } else {
2301: my @emptyResults = ();
2302: push(@emptyResults, 'missing domain');
2303: return split(':',@emptyResults);
2304: }
2305: }
2306:
2307: # -------------------------------------------------------- Value of a Condition
2308:
2309: sub directcondval {
2310: my $number=shift;
2311: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2312: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2313: } else {
2314: return 2;
2315: }
2316: }
2317:
2318: sub condval {
2319: my $condidx=shift;
2320: my $result=0;
2321: my $allpathcond='';
2322: foreach (split(/\|/,$condidx)) {
2323: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2324: $allpathcond.=
2325: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2326: }
2327: }
2328: $allpathcond=~s/\|$//;
2329: if ($ENV{'request.course.id'}) {
2330: if ($allpathcond) {
2331: my $operand='|';
2332: my @stack;
2333: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2334: if ($_ eq '(') {
2335: push @stack,($operand,$result)
2336: } elsif ($_ eq ')') {
2337: my $before=pop @stack;
2338: if (pop @stack eq '&') {
2339: $result=$result>$before?$before:$result;
2340: } else {
2341: $result=$result>$before?$result:$before;
2342: }
2343: } elsif (($_ eq '&') || ($_ eq '|')) {
2344: $operand=$_;
2345: } else {
2346: my $new=directcondval($_);
2347: if ($operand eq '&') {
2348: $result=$result>$new?$new:$result;
2349: } else {
2350: $result=$result>$new?$result:$new;
2351: }
2352: }
2353: }
2354: }
2355: }
2356: return $result;
2357: }
2358:
2359: # --------------------------------------------------- Course Resourcedata Query
2360:
2361: sub courseresdata {
2362: my ($coursenum,$coursedomain,@which)=@_;
2363: my $coursehom=&homeserver($coursenum,$coursedomain);
2364: my $hashid=$coursenum.':'.$coursedomain;
2365: my $dodump=0;
2366: if (!defined($courseresdatacache{$hashid.'.time'})) {
2367: $dodump=1;
2368: } else {
2369: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2370: }
2371: if ($dodump) {
2372: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2373: my ($tmp) = keys(%dumpreply);
2374: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2375: $courseresdatacache{$hashid.'.time'}=time;
2376: $courseresdatacache{$hashid}=\%dumpreply;
2377: }
2378: }
2379: foreach my $item (@which) {
2380: if ($courseresdatacache{$hashid}->{$item}) {
2381: return $courseresdatacache{$hashid}->{$item};
2382: }
2383: }
2384: return '';
2385: }
2386:
2387: # --------------------------------------------------------- Value of a Variable
2388:
2389: sub EXT {
2390: my ($varname,$symbparm,$udom,$uname)=@_;
2391:
2392: unless ($varname) { return ''; }
2393:
2394: #get real user name/domain, courseid and symb
2395: my $courseid;
2396: if (!($uname && $udom)) {
2397: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2398: if (!$symbparm) { $symbparm=$cursymb; }
2399: } else {
2400: $courseid=$ENV{'request.course.id'};
2401: }
2402:
2403: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2404: my $rest;
2405: if ($therest[0]) {
2406: $rest=join('.',@therest);
2407: } else {
2408: $rest='';
2409: }
2410: my $qualifierrest=$qualifier;
2411: if ($rest) { $qualifierrest.='.'.$rest; }
2412: my $spacequalifierrest=$space;
2413: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2414: if ($realm eq 'user') {
2415: # --------------------------------------------------------------- user.resource
2416: if ($space eq 'resource') {
2417: my %restored=&restore(undef,undef,$udom,$uname);
2418: return $restored{$qualifierrest};
2419: # ----------------------------------------------------------------- user.access
2420: } elsif ($space eq 'access') {
2421: # FIXME - not supporting calls for a specific user
2422: return &allowed($qualifier,$rest);
2423: # ------------------------------------------ user.preferences, user.environment
2424: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2425: if (($uname eq $ENV{'user.name'}) &&
2426: ($udom eq $ENV{'user.domain'})) {
2427: return $ENV{join('.',('environment',$qualifierrest))};
2428: } else {
2429: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2430: return $returnhash{$qualifierrest};
2431: }
2432: # ----------------------------------------------------------------- user.course
2433: } elsif ($space eq 'course') {
2434: # FIXME - not supporting calls for a specific user
2435: return $ENV{join('.',('request.course',$qualifier))};
2436: # ------------------------------------------------------------------- user.role
2437: } elsif ($space eq 'role') {
2438: # FIXME - not supporting calls for a specific user
2439: my ($role,$where)=split(/\./,$ENV{'request.role'});
2440: if ($qualifier eq 'value') {
2441: return $role;
2442: } elsif ($qualifier eq 'extent') {
2443: return $where;
2444: }
2445: # ----------------------------------------------------------------- user.domain
2446: } elsif ($space eq 'domain') {
2447: return $udom;
2448: # ------------------------------------------------------------------- user.name
2449: } elsif ($space eq 'name') {
2450: return $uname;
2451: # ---------------------------------------------------- Any other user namespace
2452: } else {
2453: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2454: my %reply=&get($space,[$item]);
2455: return $reply{$item};
2456: }
2457: } elsif ($realm eq 'query') {
2458: # ---------------------------------------------- pull stuff out of query string
2459: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
2460: return $ENV{'form.'.$space};
2461: } elsif ($realm eq 'request') {
2462: # ------------------------------------------------------------- request.browser
2463: if ($space eq 'browser') {
2464: return $ENV{'browser.'.$qualifier};
2465: # ------------------------------------------------------------ request.filename
2466: } else {
2467: return $ENV{'request.'.$spacequalifierrest};
2468: }
2469: } elsif ($realm eq 'course') {
2470: # ---------------------------------------------------------- course.description
2471: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
2472: } elsif ($realm eq 'resource') {
2473:
2474: if ($courseid eq $ENV{'request.course.id'}) {
2475:
2476: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2477:
2478: # ----------------------------------------------------- Cascading lookup scheme
2479: if (!$symbparm) { $symbparm=&symbread(); }
2480: my $symbp=$symbparm;
2481: my $mapp=(split(/\_\_\_/,$symbp))[0];
2482:
2483: my $symbparm=$symbp.'.'.$spacequalifierrest;
2484: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2485:
2486: my $section;
2487: if (($ENV{'user.name'} eq $uname) &&
2488: ($ENV{'user.domain'} eq $udom)) {
2489: $section=$ENV{'request.course.sec'};
2490: } else {
2491: $section=&usection($udom,$uname,$courseid);
2492: }
2493:
2494: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
2495: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
2496: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
2497:
2498: my $courselevel=$courseid.'.'.$spacequalifierrest;
2499: my $courselevelr=$courseid.'.'.$symbparm;
2500: my $courselevelm=$courseid.'.'.$mapparm;
2501:
2502: # ----------------------------------------------------------- first, check user
2503: my %resourcedata=&get('resourcedata',
2504: [$courselevelr,$courselevelm,$courselevel],
2505: $udom,$uname);
2506: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2507: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2508:
2509: if ($resourcedata{$courselevelr}) {
2510: return $resourcedata{$courselevelr}; }
2511: if ($resourcedata{$courselevelm}) {
2512: return $resourcedata{$courselevelm}; }
2513: if ($resourcedata{$courselevel}) {
2514: return $resourcedata{$courselevel}; }
2515: } else {
2516: if ($resourcedata{$courselevelr}!~/No such file/) {
2517: &logthis("<font color=blue>WARNING:".
2518: " Trying to get resource data for ".
2519: $uname." at ".$udom.": ".
2520: $resourcedata{$courselevelr}."</font>");
2521: }
2522: }
2523:
2524: # -------------------------------------------------------- second, check course
2525:
2526: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
2527: $ENV{'course.'.$courseid.'.domain'},
2528: ($seclevelr,$seclevelm,$seclevel,
2529: $courselevelr,$courselevelm,
2530: $courselevel));
2531: if ($coursereply) { return $coursereply; }
2532:
2533: # ------------------------------------------------------ third, check map parms
2534: my %parmhash=();
2535: my $thisparm='';
2536: if (tie(%parmhash,'GDBM_File',
2537: $ENV{'request.course.fn'}.'_parms.db',
2538: &GDBM_READER(),0640)) {
2539: $thisparm=$parmhash{$symbparm};
2540: untie(%parmhash);
2541: }
2542: if ($thisparm) { return $thisparm; }
2543: }
2544: # --------------------------------------------- last, look in resource metadata
2545:
2546: $spacequalifierrest=~s/\./\_/;
2547: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2548: if ($metadata) { return $metadata; }
2549: $metadata=&metadata($ENV{'request.filename'},
2550: 'parameter_'.$spacequalifierrest);
2551: if ($metadata) { return $metadata; }
2552:
2553: # ------------------------------------------------------------------ Cascade up
2554: unless ($space eq '0') {
2555: my ($part,$id)=split(/\_/,$space);
2556: if ($id) {
2557: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2558: $symbparm,$udom,$uname);
2559: if ($partgeneral) { return $partgeneral; }
2560: } else {
2561: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2562: $symbparm,$udom,$uname);
2563: if ($resourcegeneral) { return $resourcegeneral; }
2564: }
2565: }
2566:
2567: # ---------------------------------------------------- Any other user namespace
2568: } elsif ($realm eq 'environment') {
2569: # ----------------------------------------------------------------- environment
2570: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
2571: return $ENV{'environment.'.$spacequalifierrest};
2572: } else {
2573: my %returnhash=&userenvironment($udom,$uname,
2574: $spacequalifierrest);
2575: return $returnhash{$spacequalifierrest};
2576: }
2577: } elsif ($realm eq 'system') {
2578: # ----------------------------------------------------------------- system.time
2579: if ($space eq 'time') {
2580: return time;
2581: }
2582: }
2583: return '';
2584: }
2585:
2586: # ---------------------------------------------------------------- Get metadata
2587:
2588: sub metadata {
2589: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2590:
2591: $uri=&declutter($uri);
2592: my $filename=$uri;
2593: $uri=~s/\.meta$//;
2594: #
2595: # Is the metadata already cached?
2596: # Look at timestamp of caching
2597: # Everything is cached by the main uri, libraries are never directly cached
2598: #
2599: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2600: #
2601: # Is this a recursive call for a library?
2602: #
2603: if ($liburi) {
2604: $liburi=&declutter($liburi);
2605: $filename=$liburi;
2606: }
2607: my %metathesekeys=();
2608: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2609: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2610: my $parser=HTML::LCParser->new(\$metastring);
2611: my $token;
2612: undef %metathesekeys;
2613: while ($token=$parser->get_token) {
2614: if ($token->[0] eq 'S') {
2615: if (defined($token->[2]->{'package'})) {
2616: #
2617: # This is a package - get package info
2618: #
2619: my $package=$token->[2]->{'package'};
2620: my $keyroot='';
2621: if ($prefix) {
2622: $keyroot.='_'.$prefix;
2623: } else {
2624: if (defined($token->[2]->{'part'})) {
2625: $keyroot.='_'.$token->[2]->{'part'};
2626: }
2627: }
2628: if (defined($token->[2]->{'id'})) {
2629: $keyroot.='_'.$token->[2]->{'id'};
2630: }
2631: if ($metacache{$uri.':packages'}) {
2632: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2633: } else {
2634: $metacache{$uri.':packages'}=$package.$keyroot;
2635: }
2636: foreach (keys %packagetab) {
2637: if ($_=~/^$package\&/) {
2638: my ($pack,$name,$subp)=split(/\&/,$_);
2639: my $value=$packagetab{$_};
2640: my $part=$keyroot;
2641: $part=~s/^\_//;
2642: if ($subp eq 'display') {
2643: $value.=' [Part: '.$part.']';
2644: }
2645: my $unikey='parameter'.$keyroot.'_'.$name;
2646: $metathesekeys{$unikey}=1;
2647: $metacache{$uri.':'.$unikey.'.part'}=$part;
2648: unless
2649: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2650: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2651: }
2652: }
2653: }
2654: } else {
2655: #
2656: # This is not a package - some other kind of start tag
2657: #
2658: my $entry=$token->[1];
2659: my $unikey;
2660: if ($entry eq 'import') {
2661: $unikey='';
2662: } else {
2663: $unikey=$entry;
2664: }
2665: if ($prefix) {
2666: $unikey.=$prefix;
2667: } else {
2668: if (defined($token->[2]->{'part'})) {
2669: $unikey.='_'.$token->[2]->{'part'};
2670: }
2671: }
2672: if (defined($token->[2]->{'id'})) {
2673: $unikey.='_'.$token->[2]->{'id'};
2674: }
2675:
2676: if ($entry eq 'import') {
2677: #
2678: # Importing a library here
2679: #
2680: if (defined($depthcount)) { $depthcount++; } else
2681: { $depthcount=0; }
2682: if ($depthcount<20) {
2683: foreach (split(/\,/,&metadata($uri,'keys',
2684: $parser->get_text('/import'),$unikey,
2685: $depthcount))) {
2686: $metathesekeys{$_}=1;
2687: }
2688: }
2689: } else {
2690:
2691: if (defined($token->[2]->{'name'})) {
2692: $unikey.='_'.$token->[2]->{'name'};
2693: }
2694: $metathesekeys{$unikey}=1;
2695: foreach (@{$token->[3]}) {
2696: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2697: }
2698: unless (
2699: $metacache{$uri.':'.$unikey}=&HTML::Entities::decode($parser->get_text('/'.$entry))
2700: ) { $metacache{$uri.':'.$unikey}=
2701: $metacache{$uri.':'.$unikey.'.default'};
2702: }
2703: # end of not-a-package not-a-library import
2704: }
2705: # end of not-a-package start tag
2706: }
2707: # the next is the end of "start tag"
2708: }
2709: }
2710: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
2711: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2712: $metacache{$uri.':cachedtimestamp'}=time;
2713: # this is the end of "was not already recently cached
2714: }
2715: return $metacache{$uri.':'.$what};
2716: }
2717:
2718: sub metadata_generate_part0 {
2719: my ($metadata,$metacache,$uri) = @_;
2720: my %allnames;
2721: foreach my $metakey (sort keys %$metadata) {
2722: if ($metakey=~/^parameter\_(.*)/) {
2723: my $part=$$metacache{$uri.':'.$metakey.'.part'};
2724: my $name=$$metacache{$uri.':'.$metakey.'.name'};
2725: if (! exists($$metadata{'parameter_0_'.$name})) {
2726: $allnames{$name}=$part;
2727: }
2728: }
2729: }
2730: foreach my $name (keys(%allnames)) {
2731: $$metadata{"parameter_0_$name"}=1;
2732: my $key="$uri:parameter_0_$name";
2733: $$metacache{"$key.part"}='0';
2734: $$metacache{"$key.name"}=$name;
2735: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
2736: $allnames{$name}.'_'.$name.
2737: '.type'};
2738: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
2739: '.display'};
2740: my $expr='\\[Part: '.$allnames{$name}.'\\]';
2741: $olddis=~s/$expr/\[Part: 0\]/;
2742: $$metacache{"$key.display"}=$olddis;
2743: }
2744: }
2745:
2746: # ------------------------------------------------- Update symbolic store links
2747:
2748: sub symblist {
2749: my ($mapname,%newhash)=@_;
2750: $mapname=declutter($mapname);
2751: my %hash;
2752: if (($ENV{'request.course.fn'}) && (%newhash)) {
2753: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2754: &GDBM_WRCREAT(),0640)) {
2755: foreach (keys %newhash) {
2756: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2757: }
2758: if (untie(%hash)) {
2759: return 'ok';
2760: }
2761: }
2762: }
2763: return 'error';
2764: }
2765:
2766: # --------------------------------------------------------------- Verify a symb
2767:
2768: sub symbverify {
2769: my ($symb,$thisfn)=@_;
2770: $thisfn=&declutter($thisfn);
2771: # direct jump to resource in page or to a sequence - will construct own symbs
2772: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
2773: # check URL part
2774: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
2775: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
2776:
2777: $symb=&symbclean($symb);
2778:
2779: my %bighash;
2780: my $okay=0;
2781: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2782: &GDBM_READER(),0640)) {
2783: my $ids=$bighash{'ids_/res/'.$thisfn};
2784: unless ($ids) {
2785: $ids=$bighash{'ids_/'.$thisfn};
2786: }
2787: if ($ids) {
2788: # ------------------------------------------------------------------- Has ID(s)
2789: foreach (split(/\,/,$ids)) {
2790: my ($mapid,$resid)=split(/\./,$_);
2791: if (
2792: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
2793: eq $symb) {
2794: $okay=1;
2795: }
2796: }
2797: }
2798: untie(%bighash);
2799: }
2800: return $okay;
2801: }
2802:
2803: # --------------------------------------------------------------- Clean-up symb
2804:
2805: sub symbclean {
2806: my $symb=shift;
2807:
2808: # remove version from map
2809: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
2810:
2811: # remove version from URL
2812: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
2813:
2814: return $symb;
2815: }
2816:
2817: # ------------------------------------------------------ Return symb list entry
2818:
2819: sub symbread {
2820: my ($thisfn,$donotrecurse)=@_;
2821: # no filename provided? try from environment
2822: unless ($thisfn) {
2823: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
2824: $thisfn=$ENV{'request.filename'};
2825: }
2826: # is that filename actually a symb? Verify, clean, and return
2827: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
2828: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
2829: }
2830: $thisfn=declutter($thisfn);
2831: my %hash;
2832: my %bighash;
2833: my $syval='';
2834: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2835: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2836: &GDBM_READER(),0640)) {
2837: $syval=$hash{$thisfn};
2838: untie(%hash);
2839: }
2840: # ---------------------------------------------------------- There was an entry
2841: if ($syval) {
2842: unless ($syval=~/\_\d+$/) {
2843: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2844: &appenv('request.ambiguous' => $thisfn);
2845: return '';
2846: }
2847: $syval.=$1;
2848: }
2849: } else {
2850: # ------------------------------------------------------- Was not in symb table
2851: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2852: &GDBM_READER(),0640)) {
2853: # ---------------------------------------------- Get ID(s) for current resource
2854: my $ids=$bighash{'ids_/res/'.$thisfn};
2855: unless ($ids) {
2856: $ids=$bighash{'ids_/'.$thisfn};
2857: }
2858: unless ($ids) {
2859: # alias?
2860: $ids=$bighash{'mapalias_'.$thisfn};
2861: }
2862: if ($ids) {
2863: # ------------------------------------------------------------------- Has ID(s)
2864: my @possibilities=split(/\,/,$ids);
2865: if ($#possibilities==0) {
2866: # ----------------------------------------------- There is only one possibility
2867: my ($mapid,$resid)=split(/\./,$ids);
2868: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2869: } elsif (!$donotrecurse) {
2870: # ------------------------------------------ There is more than one possibility
2871: my $realpossible=0;
2872: foreach (@possibilities) {
2873: my $file=$bighash{'src_'.$_};
2874: if (&allowed('bre',$file)) {
2875: my ($mapid,$resid)=split(/\./,$_);
2876: if ($bighash{'map_type_'.$mapid} ne 'page') {
2877: $realpossible++;
2878: $syval=declutter($bighash{'map_id_'.$mapid}).
2879: '___'.$resid;
2880: }
2881: }
2882: }
2883: if ($realpossible!=1) { $syval=''; }
2884: } else {
2885: $syval='';
2886: }
2887: }
2888: untie(%bighash)
2889: }
2890: }
2891: if ($syval) {
2892: return &symbclean($syval.'___'.$thisfn);
2893: }
2894: }
2895: &appenv('request.ambiguous' => $thisfn);
2896: return '';
2897: }
2898:
2899: # ---------------------------------------------------------- Return random seed
2900:
2901: sub numval {
2902: my $txt=shift;
2903: $txt=~tr/A-J/0-9/;
2904: $txt=~tr/a-j/0-9/;
2905: $txt=~tr/K-T/0-9/;
2906: $txt=~tr/k-t/0-9/;
2907: $txt=~tr/U-Z/0-5/;
2908: $txt=~tr/u-z/0-5/;
2909: $txt=~s/\D//g;
2910: return int($txt);
2911: }
2912:
2913: sub rndseed {
2914: my ($symb,$courseid,$domain,$username)=@_;
2915: if (!$symb) {
2916: unless ($symb=&symbread()) { return time; }
2917: }
2918: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2919: if (!$domain) {$domain=$ENV{'user.domain'};}
2920: if (!$username) {$username=$ENV{'user.name'};}
2921: {
2922: use integer;
2923: my $symbchck=unpack("%32C*",$symb) << 27;
2924: my $symbseed=numval($symb) << 22;
2925: my $namechck=unpack("%32C*",$username) << 17;
2926: my $nameseed=numval($username) << 12;
2927: my $domainseed=unpack("%32C*",$domain) << 7;
2928: my $courseseed=unpack("%32C*",$courseid);
2929: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2930: #uncommenting these lines can break things!
2931: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2932: #&Apache::lonxml::debug("rndseed :$num:$symb");
2933: return $num;
2934: }
2935: }
2936:
2937: sub ireceipt {
2938: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2939: my $cuname=unpack("%32C*",$funame);
2940: my $cudom=unpack("%32C*",$fudom);
2941: my $cucourseid=unpack("%32C*",$fucourseid);
2942: my $cusymb=unpack("%32C*",$fusymb);
2943: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2944: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2945: ($cunique%$cuname+
2946: $cunique%$cudom+
2947: $cusymb%$cuname+
2948: $cusymb%$cudom+
2949: $cucourseid%$cuname+
2950: $cucourseid%$cudom);
2951: }
2952:
2953: sub receipt {
2954: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
2955: return &ireceipt($name,$domain,$courseid,$symb);
2956: }
2957:
2958: # ------------------------------------------------------------ Serves up a file
2959: # returns either the contents of the file or a -1
2960: sub getfile {
2961: my $file=shift;
2962: &repcopy($file);
2963: if (! -e $file ) { return -1; };
2964: my $fh=Apache::File->new($file);
2965: my $a='';
2966: while (<$fh>) { $a .=$_; }
2967: return $a
2968: }
2969:
2970: sub filelocation {
2971: my ($dir,$file) = @_;
2972: my $location;
2973: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2974: if ($file=~m:^/~:) { # is a contruction space reference
2975: $location = $file;
2976: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2977: } else {
2978: $file=~s/^$perlvar{'lonDocRoot'}//;
2979: $file=~s:^/*res::;
2980: if ( !( $file =~ m:^/:) ) {
2981: $location = $dir. '/'.$file;
2982: } else {
2983: $location = '/home/httpd/html/res'.$file;
2984: }
2985: }
2986: $location=~s://+:/:g; # remove duplicate /
2987: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2988: return $location;
2989: }
2990:
2991: sub hreflocation {
2992: my ($dir,$file)=@_;
2993: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
2994: my $finalpath=filelocation($dir,$file);
2995: $finalpath=~s/^\/home\/httpd\/html//;
2996: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
2997: return $finalpath;
2998: } else {
2999: return $file;
3000: }
3001: }
3002:
3003: # ------------------------------------------------------------- Declutters URLs
3004:
3005: sub declutter {
3006: my $thisfn=shift;
3007: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3008: $thisfn=~s/^\///;
3009: $thisfn=~s/^res\///;
3010: $thisfn=~s/\?.+$//;
3011: return $thisfn;
3012: }
3013:
3014: # -------------------------------------------------------- Escape Special Chars
3015:
3016: sub escape {
3017: my $str=shift;
3018: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3019: return $str;
3020: }
3021:
3022: # ----------------------------------------------------- Un-Escape Special Chars
3023:
3024: sub unescape {
3025: my $str=shift;
3026: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3027: return $str;
3028: }
3029:
3030: # ================================================================ Main Program
3031:
3032: sub goodbye {
3033: &logthis("Starting Shut down");
3034: &flushcourselogs();
3035: &logthis("Shutting down");
3036: }
3037:
3038: BEGIN {
3039: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3040: unless ($readit) {
3041: {
3042: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3043:
3044: while (my $configline=<$config>) {
3045: if ($configline =~ /^[^\#]*PerlSetVar/) {
3046: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3047: chomp($varvalue);
3048: $perlvar{$varname}=$varvalue;
3049: }
3050: }
3051: }
3052: {
3053: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3054:
3055: while (my $configline=<$config>) {
3056: if ($configline =~ /^[^\#]*PerlSetVar/) {
3057: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3058: chomp($varvalue);
3059: $perlvar{$varname}=$varvalue;
3060: }
3061: }
3062: }
3063:
3064: # ------------------------------------------------------------- Read hosts file
3065: {
3066: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3067:
3068: while (my $configline=<$config>) {
3069: chomp($configline);
3070: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3071: if ($id && $domain && $role && $name && $ip) {
3072: $hostname{$id}=$name;
3073: $hostdom{$id}=$domain;
3074: $hostip{$id}=$ip;
3075: if ($domdescr) { $domaindescription{$domain}=$domdescr; }
3076: if ($role eq 'library') { $libserv{$id}=$name; }
3077: } else {
3078: if ($configline) {
3079: &logthis("Skipping hosts.tab line -$configline-");
3080: }
3081: }
3082: }
3083: }
3084:
3085: # ------------------------------------------------------ Read spare server file
3086: {
3087: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3088:
3089: while (my $configline=<$config>) {
3090: chomp($configline);
3091: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
3092: $spareid{$configline}=1;
3093: }
3094: }
3095: }
3096: # ------------------------------------------------------------ Read permissions
3097: {
3098: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3099:
3100: while (my $configline=<$config>) {
3101: chomp($configline);
3102: if ($configline) {
3103: my ($role,$perm)=split(/ /,$configline);
3104: if ($perm ne '') { $pr{$role}=$perm; }
3105: }
3106: }
3107: }
3108:
3109: # -------------------------------------------- Read plain texts for permissions
3110: {
3111: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3112:
3113: while (my $configline=<$config>) {
3114: chomp($configline);
3115: if ($configline) {
3116: my ($short,$plain)=split(/:/,$configline);
3117: if ($plain ne '') { $prp{$short}=$plain; }
3118: }
3119: }
3120: }
3121:
3122: # ---------------------------------------------------------- Read package table
3123: {
3124: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3125:
3126: while (my $configline=<$config>) {
3127: chomp($configline);
3128: my ($short,$plain)=split(/:/,$configline);
3129: my ($pack,$name)=split(/\&/,$short);
3130: if ($plain ne '') {
3131: $packagetab{$pack.'&'.$name.'&name'}=$name;
3132: $packagetab{$short}=$plain;
3133: }
3134: }
3135: }
3136:
3137: %metacache=();
3138:
3139: $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
3140: $dumpcount=0;
3141:
3142: &logtouch();
3143: &logthis('<font color=yellow>INFO: Read configuration</font>');
3144: $readit=1;
3145: }
3146: }
3147:
3148: 1;
3149: __END__
3150:
3151: =pod
3152:
3153: =head1 NAME
3154:
3155: Apache::lonnet - Subroutines to ask questions about things in the network.
3156:
3157: =head1 SYNOPSIS
3158:
3159: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3160:
3161: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3162:
3163: Common parameters:
3164:
3165: =over 4
3166:
3167: =item *
3168:
3169: $uname : an internal username (if $cname expecting a course Id specifically)
3170:
3171: =item *
3172:
3173: $udom : a domain (if $cdom expecting a course's domain specifically)
3174:
3175: =item *
3176:
3177: $symb : a resource instance identifier
3178:
3179: =item *
3180:
3181: $namespace : the name of a .db file that contains the data needed or
3182: being set.
3183:
3184: =back
3185:
3186: =head1 INTRODUCTION
3187:
3188: This module provides subroutines which interact with the
3189: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3190: - classes
3191: - users
3192: - resources
3193:
3194: For many of these objects you can also use this to store data about
3195: them or modify them in various ways.
3196:
3197: This is part of the LearningOnline Network with CAPA project
3198: described at http://www.lon-capa.org.
3199:
3200: =head1 RETURN MESSAGES
3201:
3202: =over 4
3203:
3204: =item *
3205:
3206: con_lost : unable to contact remote host
3207:
3208: =item *
3209:
3210: con_delayed : unable to contact remote host, message will be delivered
3211: when the connection is brought back up
3212:
3213: =item *
3214:
3215: con_failed : unable to contact remote host and unable to save message
3216: for later delivery
3217:
3218: =item *
3219:
3220: error: : an error a occured, a description of the error follows the :
3221:
3222: =item *
3223:
3224: no_such_host : unable to fund a host associated with the user/domain
3225: that was requested
3226:
3227: =back
3228:
3229: =head1 PUBLIC SUBROUTINES
3230:
3231: =head2 Session Environment Functions
3232:
3233: =over 4
3234:
3235: =item *
3236:
3237: appenv(%hash) : the value of %hash is written to the user envirnoment
3238: file, and will be restored for each access this user makes during this
3239: session, also modifies the %ENV for the current process
3240:
3241: =item *
3242:
3243: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3244:
3245: =back
3246:
3247: =head2 User Information
3248:
3249: =over 4
3250:
3251: =item *
3252:
3253: queryauthenticate($uname,$udom) : try to determine user's current
3254: authentication scheme
3255:
3256: =item *
3257:
3258: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3259: servers (first use the current one), $upass should be the users password
3260:
3261: =item *
3262:
3263: homeserver($uname,$udom) : find the server which has the user's
3264: directory and files (there must be only one), this caches the answer,
3265: and also caches if there is a borken connection.
3266:
3267: =item *
3268:
3269: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3270: unique resource in a domain, there must be only 1 ID per username, and
3271: only 1 username per ID in a specific domain) (returns hash:
3272: id=>name,id=>name)
3273:
3274: =item *
3275:
3276: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3277: name=>id,name=>id)
3278:
3279: =item *
3280:
3281: idput($udom,%ids) : store away a list of names and associated IDs
3282:
3283: =item *
3284:
3285: rolesinit($udom,$username,$authhost) : get user privileges
3286:
3287: =item *
3288:
3289: usection($udom,$uname,$cname) : finds the section of student in the
3290: course $cname, return section name/number or '' for "not in course"
3291: and '-1' for "no section"
3292:
3293: =item *
3294:
3295: userenvironment($udom,$uname,@what) : gets the values of the keys
3296: passed in @what from the requested user's environment, returns a hash
3297:
3298: =back
3299:
3300: =head2 User Roles
3301:
3302: =over 4
3303:
3304: =item *
3305:
3306: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
3307: actions
3308: F: full access
3309: U,I,K: authentication modes (cxx only)
3310: '': forbidden
3311: 1: user needs to choose course
3312: 2: browse allowed
3313:
3314: =item *
3315:
3316: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
3317: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
3318: and course level
3319:
3320: =item *
3321:
3322: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
3323: explanation of a user role term
3324:
3325: =back
3326:
3327: =head2 User Modification
3328:
3329: =over 4
3330:
3331: =item *
3332:
3333: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
3334: user for the level given by URL. Optional start and end dates (leave empty
3335: string or zero for "no date")
3336:
3337: =item *
3338:
3339: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
3340: change a users, password, possible return values are: ok,
3341: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
3342: refused
3343:
3344: =item *
3345:
3346: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
3347:
3348: =item *
3349:
3350: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
3351: modify user
3352:
3353: =item *
3354:
3355: modifystudent($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,$end,$start) : modify student
3356:
3357: =item *
3358:
3359: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
3360: custom role; give a custom role to a user for the level given by URL. Specify
3361: name and domain of role author, and role name
3362:
3363: =item *
3364:
3365: revokerole($udom,$uname,$url,$role) : revoke a role for url
3366:
3367: =item *
3368:
3369: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
3370:
3371: =back
3372:
3373: =head2 Course Infomation
3374:
3375: =over 4
3376:
3377: =item *
3378:
3379: coursedescription($courseid) : course description
3380:
3381: =item *
3382:
3383: courseresdata($coursenum,$coursedomain,@which) : request for current
3384: parameter setting for a specific course, @what should be a list of
3385: parameters to ask about. This routine caches answers for 5 minutes.
3386:
3387: =back
3388:
3389: =head2 Course Modification
3390:
3391: =over 4
3392:
3393: =item *
3394:
3395: writecoursepref($courseid,%prefs) : write preferences (environment
3396: database) for a course
3397:
3398: =item *
3399:
3400: createcourse($udom,$description,$url) : make/modify course
3401:
3402: =back
3403:
3404: =head2 Resource Subroutines
3405:
3406: =over 4
3407:
3408: =item *
3409:
3410: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
3411:
3412: =item *
3413:
3414: repcopy($filename) : subscribes to the requested file, and attempts to
3415: replicate from the owning library server, Might return
3416: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
3417: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
3418: resource. Expects the local filesystem pathname
3419: (/home/httpd/html/res/....)
3420:
3421: =back
3422:
3423: =head2 Resource Information
3424:
3425: =over 4
3426:
3427: =item *
3428:
3429: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
3430: a vairety of different possible values, $varname should be a request
3431: string, and the other parameters can be used to specify who and what
3432: one is asking about.
3433:
3434: Possible values for $varname are environment.lastname (or other item
3435: from the envirnment hash), user.name (or someother aspect about the
3436: user), resource.0.maxtries (or some other part and parameter of a
3437: resource)
3438:
3439: =item *
3440:
3441: directcondval($number) : get current value of a condition; reads from a state
3442: string
3443:
3444: =item *
3445:
3446: condval($condidx) : value of condition index based on state
3447:
3448: =item *
3449:
3450: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
3451: resource's metadata, $what should be either a specific key, or either
3452: 'keys' (to get a list of possible keys) or 'packages' to get a list of
3453: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
3454:
3455: this function automatically caches all requests
3456:
3457: =item *
3458:
3459: metadata_query($query,$custom,$customshow) : make a metadata query against the
3460: network of library servers; returns file handle of where SQL and regex results
3461: will be stored for query
3462:
3463: =item *
3464:
3465: symbread($filename) : return symbolic list entry (filename argument optional);
3466: returns the data handle
3467:
3468: =item *
3469:
3470: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
3471: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
3472: failure, user must be in a course, as it assumes the existance of the
3473: course initi hash, and uses $ENV('request.course.id'}
3474:
3475:
3476: =item *
3477:
3478: symbclean($symb) : removes versions numbers from a symb, returns the
3479: cleaned symb
3480:
3481: =item *
3482:
3483: is_on_map($uri) : checks if the $uri is somewhere on the current
3484: course map, user must be in a course for it to work.
3485:
3486: =item *
3487:
3488: numval($salt) : return random seed value (addend for rndseed)
3489:
3490: =item *
3491:
3492: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
3493: a random seed, all arguments are optional, if they aren't sent it uses the
3494: environment to derive them. Note: if symb isn't sent and it can't get one
3495: from &symbread it will use the current time as its return value
3496:
3497: =item *
3498:
3499: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
3500: unfakeable, receipt
3501:
3502: =item *
3503:
3504: receipt() : API to ireceipt working off of ENV values; given out to users
3505:
3506: =item *
3507:
3508: countacc($url) : count the number of accesses to a given URL
3509:
3510: =item *
3511:
3512: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
3513:
3514: =item *
3515:
3516: checkin($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 $tcrsid)
3517:
3518: =item *
3519:
3520: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
3521:
3522: =item *
3523:
3524: devalidate($symb) : devalidate temporary spreadsheet calculations,
3525: forcing spreadsheet to reevaluate the resource scores next time.
3526:
3527: =back
3528:
3529: =head2 Storing/Retreiving Data
3530:
3531: =over 4
3532:
3533: =item *
3534:
3535: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
3536: for this url; hashref needs to be given and should be a \%hashname; the
3537: remaining args aren't required and if they aren't passed or are '' they will
3538: be derived from the ENV
3539:
3540: =item *
3541:
3542: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
3543: uses critical subroutine
3544:
3545: =item *
3546:
3547: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
3548: all args are optional
3549:
3550: =item *
3551:
3552: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
3553: works very similar to store/cstore, but all data is stored in a
3554: temporary location and can be reset using tmpreset, $storehash should
3555: be a hash reference, returns nothing on success
3556:
3557: =item *
3558:
3559: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
3560: similar to restore, but all data is stored in a temporary location and
3561: can be reset using tmpreset. Returns a hash of values on success,
3562: error string otherwise.
3563:
3564: =item *
3565:
3566: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
3567: deltes all keys for $symb form the temporary storage hash.
3568:
3569: =item *
3570:
3571: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
3572: reference filled in from namesp ($udom and $uname are optional)
3573:
3574: =item *
3575:
3576: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
3577: namesp ($udom and $uname are optional)
3578:
3579: =item *
3580:
3581: dump($namespace,$udom,$uname,$regexp) :
3582: dumps the complete (or key matching regexp) namespace into a hash
3583: ($udom, $uname and $regexp are optional)
3584:
3585: =item *
3586:
3587: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
3588: ($udom and $uname are optional)
3589:
3590: =item *
3591:
3592: cput($namespace,$storehash,$udom,$uname) : critical put
3593: ($udom and $uname are optional)
3594:
3595: =item *
3596:
3597: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
3598: reference filled in from namesp (encrypts the return communication)
3599: ($udom and $uname are optional)
3600:
3601: =item *
3602:
3603: log($udom,$name,$home,$message) : write to permanent log for user; use
3604: critical subroutine
3605:
3606: =back
3607:
3608: =head2 Network Status Functions
3609:
3610: =over 4
3611:
3612: =item *
3613:
3614: dirlist($uri) : return directory list based on URI
3615:
3616: =item *
3617:
3618: spareserver() : find server with least workload from spare.tab
3619:
3620: =back
3621:
3622: =head2 Apache Request
3623:
3624: =over 4
3625:
3626: =item *
3627:
3628: ssi($url,%hash) : server side include, does a complete request cycle on url to
3629: localhost, posts hash
3630:
3631: =back
3632:
3633: =head2 Data to String to Data
3634:
3635: =over 4
3636:
3637: =item *
3638:
3639: hash2str(%hash) : convert a hash into a string complete with escaping and '='
3640: and '&' separators, supports elements that are arrayrefs and hashrefs
3641:
3642: =item *
3643:
3644: hashref2str($hashref) : convert a hashref into a string complete with
3645: escaping and '=' and '&' separators, supports elements that are
3646: arrayrefs and hashrefs
3647:
3648: =item *
3649:
3650: arrayref2str($arrayref) : convert an arrayref into a string complete
3651: with escaping and '&' separators, supports elements that are arrayrefs
3652: and hashrefs
3653:
3654: =item *
3655:
3656: str2hash($string) : convert string to hash using unescaping and
3657: splitting on '=' and '&', supports elements that are arrayrefs and
3658: hashrefs
3659:
3660: =item *
3661:
3662: str2array($string) : convert string to hash using unescaping and
3663: splitting on '&', supports elements that are arrayrefs and hashrefs
3664:
3665: =back
3666:
3667: =head2 Logging Routines
3668:
3669: =over 4
3670:
3671: These routines allow one to make log messages in the lonnet.log and
3672: lonnet.perm logfiles.
3673:
3674: =item *
3675:
3676: logtouch() : make sure the logfile, lonnet.log, exists
3677:
3678: =item *
3679:
3680: logthis() : append message to the normal lonnet.log file, it gets
3681: preiodically rolled over and deleted.
3682:
3683: =item *
3684:
3685: logperm() : append a permanent message to lonnet.perm.log, this log
3686: file never gets deleted by any automated portion of the system, only
3687: messages of critical importance should go in here.
3688:
3689: =back
3690:
3691: =head2 General File Helper Routines
3692:
3693: =over 4
3694:
3695: =item *
3696:
3697: getfile($file) : returns the entire contents of a file or -1; it
3698: properly subscribes to and replicates the file if neccessary.
3699:
3700: =item *
3701:
3702: filelocation($dir,$file) : returns file system location of a file
3703: based on URI; meant to be "fairly clean" absolute reference, $dir is a
3704: directory that relative $file lookups are to looked in ($dir of /a/dir
3705: and a file of ../bob will become /a/bob)
3706:
3707: =item *
3708:
3709: hreflocation($dir,$file) : returns file system location or a URL; same as
3710: filelocation except for hrefs
3711:
3712: =item *
3713:
3714: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
3715:
3716: =back
3717:
3718: =head2 HTTP Helper Routines
3719:
3720: =over 4
3721:
3722: =item *
3723:
3724: escape() : unpack non-word characters into CGI-compatible hex codes
3725:
3726: =item *
3727:
3728: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
3729:
3730: =back
3731:
3732: =head1 PRIVATE SUBROUTINES
3733:
3734: =head2 Underlying communication routines (Shouldn't call)
3735:
3736: =over 4
3737:
3738: =item *
3739:
3740: subreply() : tries to pass a message to lonc, returns con_lost if incapable
3741:
3742: =item *
3743:
3744: reply() : uses subreply to send a message to remote machine, logs all failures
3745:
3746: =item *
3747:
3748: critical() : passes a critical message to another server; if cannot
3749: get through then place message in connection buffer directory and
3750: returns con_delayed, if incapable of saving message, returns
3751: con_failed
3752:
3753: =item *
3754:
3755: reconlonc() : tries to reconnect lonc client processes.
3756:
3757: =back
3758:
3759: =head2 Resource Access Logging
3760:
3761: =over 4
3762:
3763: =item *
3764:
3765: flushcourselogs() : flush (save) buffer logs and access logs
3766:
3767: =item *
3768:
3769: courselog($what) : save message for course in hash
3770:
3771: =item *
3772:
3773: courseacclog($what) : save message for course using &courselog(). Perform
3774: special processing for specific resource types (problems, exams, quizzes, etc).
3775:
3776: =item *
3777:
3778: goodbye() : flush course logs and log shutting down; it is called in srm.conf
3779: as a PerlChildExitHandler
3780:
3781: =back
3782:
3783: =head2 Other
3784:
3785: =over 4
3786:
3787: =item *
3788:
3789: symblist($mapname,%newhash) : update symbolic storage links
3790:
3791: =back
3792:
3793: =cut
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