1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.191 2001/12/18 20:59:38 harris41 Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 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: #
68: ###
69:
70: package Apache::lonnet;
71:
72: use strict;
73: use Apache::File;
74: use LWP::UserAgent();
75: use HTTP::Headers;
76: use vars
77: qw(%perlvar %hostname %homecache %hostip %spareid %hostdom
78: %libserv %pr %prp %fe %fd %metacache %packagetab
79: %courselogs %accesshash $processmarker $dumpcount
80: %coursedombuf %coursehombuf);
81: use IO::Socket;
82: use GDBM_File;
83: use Apache::Constants qw(:common :http);
84: use HTML::TokeParser;
85: use Fcntl qw(:flock);
86:
87: # --------------------------------------------------------------------- Logging
88:
89: sub logtouch {
90: my $execdir=$perlvar{'lonDaemons'};
91: unless (-e "$execdir/logs/lonnet.log") {
92: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
93: close $fh;
94: }
95: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
96: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
97: }
98:
99: sub logthis {
100: my $message=shift;
101: my $execdir=$perlvar{'lonDaemons'};
102: my $now=time;
103: my $local=localtime($now);
104: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
105: print $fh "$local ($$): $message\n";
106: return 1;
107: }
108:
109: sub logperm {
110: my $message=shift;
111: my $execdir=$perlvar{'lonDaemons'};
112: my $now=time;
113: my $local=localtime($now);
114: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
115: print $fh "$now:$message:$local\n";
116: return 1;
117: }
118:
119: # -------------------------------------------------- Non-critical communication
120: sub subreply {
121: my ($cmd,$server)=@_;
122: my $peerfile="$perlvar{'lonSockDir'}/$server";
123: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
124: Type => SOCK_STREAM,
125: Timeout => 10)
126: or return "con_lost";
127: print $client "$cmd\n";
128: my $answer=<$client>;
129: if (!$answer) { $answer="con_lost"; }
130: chomp($answer);
131: return $answer;
132: }
133:
134: sub reply {
135: my ($cmd,$server)=@_;
136: my $answer=subreply($cmd,$server);
137: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
138: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
139: &logthis("<font color=blue>WARNING:".
140: " $cmd to $server returned $answer</font>");
141: }
142: return $answer;
143: }
144:
145: # ----------------------------------------------------------- Send USR1 to lonc
146:
147: sub reconlonc {
148: my $peerfile=shift;
149: &logthis("Trying to reconnect for $peerfile");
150: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
151: if (my $fh=Apache::File->new("$loncfile")) {
152: my $loncpid=<$fh>;
153: chomp($loncpid);
154: if (kill 0 => $loncpid) {
155: &logthis("lonc at pid $loncpid responding, sending USR1");
156: kill USR1 => $loncpid;
157: sleep 1;
158: if (-e "$peerfile") { return; }
159: &logthis("$peerfile still not there, give it another try");
160: sleep 5;
161: if (-e "$peerfile") { return; }
162: &logthis(
163: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
164: } else {
165: &logthis(
166: "<font color=blue>WARNING:".
167: " lonc at pid $loncpid not responding, giving up</font>");
168: }
169: } else {
170: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
171: }
172: }
173:
174: # ------------------------------------------------------ Critical communication
175:
176: sub critical {
177: my ($cmd,$server)=@_;
178: unless ($hostname{$server}) {
179: &logthis("<font color=blue>WARNING:".
180: " Critical message to unknown server ($server)</font>");
181: return 'no_such_host';
182: }
183: my $answer=reply($cmd,$server);
184: if ($answer eq 'con_lost') {
185: my $pingreply=reply('ping',$server);
186: &reconlonc("$perlvar{'lonSockDir'}/$server");
187: my $pongreply=reply('pong',$server);
188: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
189: $answer=reply($cmd,$server);
190: if ($answer eq 'con_lost') {
191: my $now=time;
192: my $middlename=$cmd;
193: $middlename=substr($middlename,0,16);
194: $middlename=~s/\W//g;
195: my $dfilename=
196: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
197: {
198: my $dfh;
199: if ($dfh=Apache::File->new(">$dfilename")) {
200: print $dfh "$cmd\n";
201: }
202: }
203: sleep 2;
204: my $wcmd='';
205: {
206: my $dfh;
207: if ($dfh=Apache::File->new("$dfilename")) {
208: $wcmd=<$dfh>;
209: }
210: }
211: chomp($wcmd);
212: if ($wcmd eq $cmd) {
213: &logthis("<font color=blue>WARNING: ".
214: "Connection buffer $dfilename: $cmd</font>");
215: &logperm("D:$server:$cmd");
216: return 'con_delayed';
217: } else {
218: &logthis("<font color=red>CRITICAL:"
219: ." Critical connection failed: $server $cmd</font>");
220: &logperm("F:$server:$cmd");
221: return 'con_failed';
222: }
223: }
224: }
225: return $answer;
226: }
227:
228: # ---------------------------------------------------------- Append Environment
229:
230: sub appenv {
231: my %newenv=@_;
232: foreach (keys %newenv) {
233: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
234: &logthis("<font color=blue>WARNING: ".
235: "Attempt to modify environment ".$_." to ".$newenv{$_}
236: .'</font>');
237: delete($newenv{$_});
238: } else {
239: $ENV{$_}=$newenv{$_};
240: }
241: }
242:
243: my $lockfh;
244: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
245: return 'error: '.$!;
246: }
247: unless (flock($lockfh,LOCK_EX)) {
248: &logthis("<font color=blue>WARNING: ".
249: 'Could not obtain exclusive lock in appenv: '.$!);
250: $lockfh->close();
251: return 'error: '.$!;
252: }
253:
254: my @oldenv;
255: {
256: my $fh;
257: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
258: return 'error: '.$!;
259: }
260: @oldenv=<$fh>;
261: $fh->close();
262: }
263: for (my $i=0; $i<=$#oldenv; $i++) {
264: chomp($oldenv[$i]);
265: if ($oldenv[$i] ne '') {
266: my ($name,$value)=split(/=/,$oldenv[$i]);
267: unless (defined($newenv{$name})) {
268: $newenv{$name}=$value;
269: }
270: }
271: }
272: {
273: my $fh;
274: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
275: return 'error';
276: }
277: my $newname;
278: foreach $newname (keys %newenv) {
279: print $fh "$newname=$newenv{$newname}\n";
280: }
281: $fh->close();
282: }
283:
284: $lockfh->close();
285: return 'ok';
286: }
287: # ----------------------------------------------------- Delete from Environment
288:
289: sub delenv {
290: my $delthis=shift;
291: my %newenv=();
292: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
293: &logthis("<font color=blue>WARNING: ".
294: "Attempt to delete from environment ".$delthis);
295: return 'error';
296: }
297: my @oldenv;
298: {
299: my $fh;
300: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
301: return 'error';
302: }
303: unless (flock($fh,LOCK_SH)) {
304: &logthis("<font color=blue>WARNING: ".
305: 'Could not obtain shared lock in delenv: '.$!);
306: $fh->close();
307: return 'error: '.$!;
308: }
309: @oldenv=<$fh>;
310: $fh->close();
311: }
312: {
313: my $fh;
314: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
315: return 'error';
316: }
317: unless (flock($fh,LOCK_EX)) {
318: &logthis("<font color=blue>WARNING: ".
319: 'Could not obtain exclusive lock in delenv: '.$!);
320: $fh->close();
321: return 'error: '.$!;
322: }
323: foreach (@oldenv) {
324: unless ($_=~/^$delthis/) { print $fh $_; }
325: }
326: $fh->close();
327: }
328: return 'ok';
329: }
330:
331: # ------------------------------ Find server with least workload from spare.tab
332:
333: sub spareserver {
334: my $tryserver;
335: my $spareserver='';
336: my $lowestserver=100;
337: foreach $tryserver (keys %spareid) {
338: my $answer=reply('load',$tryserver);
339: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
340: $spareserver="http://$hostname{$tryserver}";
341: $lowestserver=$answer;
342: }
343: }
344: return $spareserver;
345: }
346:
347: # ----------------------- Try to determine user's current authentication scheme
348:
349: sub queryauthenticate {
350: my ($uname,$udom)=@_;
351: if (($perlvar{'lonRole'} eq 'library') &&
352: ($udom eq $perlvar{'lonDefDomain'})) {
353: my $answer=reply("encrypt:currentauth:$udom:$uname",
354: $perlvar{'lonHostID'});
355: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
356: if (length($answer)) {
357: return $answer;
358: }
359: else {
360: &logthis("User $uname at $udom lacks an authentication mechanism");
361: return 'no_host';
362: }
363: }
364: }
365:
366: my $tryserver;
367: foreach $tryserver (keys %libserv) {
368: if ($hostdom{$tryserver} eq $udom) {
369: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
370: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
371: if (length($answer)) {
372: return $answer;
373: }
374: else {
375: &logthis("User $uname at $udom lacks an authentication mechanism");
376: return 'no_host';
377: }
378: }
379: }
380: }
381: &logthis("User $uname at $udom lacks an authentication mechanism");
382: return 'no_host';
383: }
384:
385: # --------- Try to authenticate user from domain's lib servers (first this one)
386:
387: sub authenticate {
388: my ($uname,$upass,$udom)=@_;
389: $upass=escape($upass);
390: if (($perlvar{'lonRole'} eq 'library') &&
391: ($udom eq $perlvar{'lonDefDomain'})) {
392: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
393: if ($answer =~ /authorized/) {
394: if ($answer eq 'authorized') {
395: &logthis("User $uname at $udom authorized by local server");
396: return $perlvar{'lonHostID'};
397: }
398: if ($answer eq 'non_authorized') {
399: &logthis("User $uname at $udom rejected by local server");
400: return 'no_host';
401: }
402: }
403: }
404:
405: my $tryserver;
406: foreach $tryserver (keys %libserv) {
407: if ($hostdom{$tryserver} eq $udom) {
408: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
409: if ($answer =~ /authorized/) {
410: if ($answer eq 'authorized') {
411: &logthis("User $uname at $udom authorized by $tryserver");
412: return $tryserver;
413: }
414: if ($answer eq 'non_authorized') {
415: &logthis("User $uname at $udom rejected by $tryserver");
416: return 'no_host';
417: }
418: }
419: }
420: }
421: &logthis("User $uname at $udom could not be authenticated");
422: return 'no_host';
423: }
424:
425: # ---------------------- Find the homebase for a user from domain's lib servers
426:
427: sub homeserver {
428: my ($uname,$udom)=@_;
429:
430: my $index="$uname:$udom";
431: if ($homecache{$index}) { return "$homecache{$index}"; }
432:
433: my $tryserver;
434: foreach $tryserver (keys %libserv) {
435: if ($hostdom{$tryserver} eq $udom) {
436: my $answer=reply("home:$udom:$uname",$tryserver);
437: if ($answer eq 'found') {
438: $homecache{$index}=$tryserver;
439: return $tryserver;
440: }
441: }
442: }
443: return 'no_host';
444: }
445:
446: # ------------------------------------- Find the usernames behind a list of IDs
447:
448: sub idget {
449: my ($udom,@ids)=@_;
450: my %returnhash=();
451:
452: my $tryserver;
453: foreach $tryserver (keys %libserv) {
454: if ($hostdom{$tryserver} eq $udom) {
455: my $idlist=join('&',@ids);
456: $idlist=~tr/A-Z/a-z/;
457: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
458: my @answer=();
459: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
460: @answer=split(/\&/,$reply);
461: } ;
462: my $i;
463: for ($i=0;$i<=$#ids;$i++) {
464: if ($answer[$i]) {
465: $returnhash{$ids[$i]}=$answer[$i];
466: }
467: }
468: }
469: }
470: return %returnhash;
471: }
472:
473: # ------------------------------------- Find the IDs behind a list of usernames
474:
475: sub idrget {
476: my ($udom,@unames)=@_;
477: my %returnhash=();
478: foreach (@unames) {
479: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
480: }
481: return %returnhash;
482: }
483:
484: # ------------------------------- Store away a list of names and associated IDs
485:
486: sub idput {
487: my ($udom,%ids)=@_;
488: my %servers=();
489: foreach (keys %ids) {
490: my $uhom=&homeserver($_,$udom);
491: if ($uhom ne 'no_host') {
492: my $id=&escape($ids{$_});
493: $id=~tr/A-Z/a-z/;
494: my $unam=&escape($_);
495: if ($servers{$uhom}) {
496: $servers{$uhom}.='&'.$id.'='.$unam;
497: } else {
498: $servers{$uhom}=$id.'='.$unam;
499: }
500: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
501: }
502: }
503: foreach (keys %servers) {
504: &critical('idput:'.$udom.':'.$servers{$_},$_);
505: }
506: }
507:
508: # ------------------------------------- Find the section of student in a course
509:
510: sub usection {
511: my ($udom,$unam,$courseid)=@_;
512: $courseid=~s/\_/\//g;
513: $courseid=~s/^(\w)/\/$1/;
514: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
515: &homeserver($unam,$udom)))) {
516: my ($key,$value)=split(/\=/,$_);
517: $key=&unescape($key);
518: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
519: my $section=$1;
520: if ($key eq $courseid.'_st') { $section=''; }
521: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
522: my $now=time;
523: my $notactive=0;
524: if ($start) {
525: if ($now<$start) { $notactive=1; }
526: }
527: if ($end) {
528: if ($now>$end) { $notactive=1; }
529: }
530: unless ($notactive) { return $section; }
531: }
532: }
533: return '-1';
534: }
535:
536: # ------------------------------------- Read an entry from a user's environment
537:
538: sub userenvironment {
539: my ($udom,$unam,@what)=@_;
540: my %returnhash=();
541: my @answer=split(/\&/,
542: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
543: &homeserver($unam,$udom)));
544: my $i;
545: for ($i=0;$i<=$#what;$i++) {
546: $returnhash{$what[$i]}=&unescape($answer[$i]);
547: }
548: return %returnhash;
549: }
550:
551: # ----------------------------- Subscribe to a resource, return URL if possible
552:
553: sub subscribe {
554: my $fname=shift;
555: my $author=$fname;
556: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
557: my ($udom,$uname)=split(/\//,$author);
558: my $home=homeserver($uname,$udom);
559: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
560: return 'not_found';
561: }
562: my $answer=reply("sub:$fname",$home);
563: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
564: $answer.=' by '.$home;
565: }
566: return $answer;
567: }
568:
569: # -------------------------------------------------------------- Replicate file
570:
571: sub repcopy {
572: my $filename=shift;
573: $filename=~s/\/+/\//g;
574: my $transname="$filename.in.transfer";
575: if ((-e $filename) || (-e $transname)) { return OK; }
576: my $remoteurl=subscribe($filename);
577: if ($remoteurl =~ /^con_lost by/) {
578: &logthis("Subscribe returned $remoteurl: $filename");
579: return HTTP_SERVICE_UNAVAILABLE;
580: } elsif ($remoteurl eq 'not_found') {
581: &logthis("Subscribe returned not_found: $filename");
582: return HTTP_NOT_FOUND;
583: } elsif ($remoteurl =~ /^rejected by/) {
584: &logthis("Subscribe returned $remoteurl: $filename");
585: return FORBIDDEN;
586: } elsif ($remoteurl eq 'directory') {
587: return OK;
588: } else {
589: my @parts=split(/\//,$filename);
590: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
591: if ($path ne "$perlvar{'lonDocRoot'}/res") {
592: &logthis("Malconfiguration for replication: $filename");
593: return HTTP_BAD_REQUEST;
594: }
595: my $count;
596: for ($count=5;$count<$#parts;$count++) {
597: $path.="/$parts[$count]";
598: if ((-e $path)!=1) {
599: mkdir($path,0777);
600: }
601: }
602: my $ua=new LWP::UserAgent;
603: my $request=new HTTP::Request('GET',"$remoteurl");
604: my $response=$ua->request($request,$transname);
605: if ($response->is_error()) {
606: unlink($transname);
607: my $message=$response->status_line;
608: &logthis("<font color=blue>WARNING:"
609: ." LWP get: $message: $filename</font>");
610: return HTTP_SERVICE_UNAVAILABLE;
611: } else {
612: if ($remoteurl!~/\.meta$/) {
613: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
614: my $mresponse=$ua->request($mrequest,$filename.'.meta');
615: if ($mresponse->is_error()) {
616: unlink($filename.'.meta');
617: &logthis(
618: "<font color=yellow>INFO: No metadata: $filename</font>");
619: }
620: }
621: rename($transname,$filename);
622: return OK;
623: }
624: }
625: }
626:
627: # --------------------------------------------------------- Server Side Include
628:
629: sub ssi {
630:
631: my ($fn,%form)=@_;
632:
633: my $ua=new LWP::UserAgent;
634:
635: my $request;
636:
637: if (%form) {
638: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
639: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
640: } else {
641: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
642: }
643:
644: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
645: my $response=$ua->request($request);
646:
647: return $response->content;
648: }
649:
650: # ------------------------------------------------------------------------- Log
651:
652: sub log {
653: my ($dom,$nam,$hom,$what)=@_;
654: return critical("log:$dom:$nam:$what",$hom);
655: }
656:
657: # ------------------------------------------------------------------ Course Log
658:
659: sub flushcourselogs {
660: &logthis('Flushing course log buffers');
661: foreach (keys %courselogs) {
662: my $crsid=$_;
663: if (&reply('log:'.$coursedombuf{$crsid}.':'.
664: &escape($courselogs{$crsid}),
665: $coursehombuf{$crsid}) eq 'ok') {
666: delete $courselogs{$crsid};
667: } else {
668: &logthis('Failed to flush log buffer for '.$crsid);
669: if (length($courselogs{$crsid})>40000) {
670: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
671: " exceeded maximum size, deleting.</font>");
672: delete $courselogs{$crsid};
673: }
674: }
675: }
676: &logthis('Flushing access logs');
677: foreach (keys %accesshash) {
678: my $entry=$_;
679: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
680: my %temphash=($entry => $accesshash{$entry});
681: if (&Apache::lonnet::put('resevaldata',\%temphash,$1,$2) eq 'ok') {
682: delete $accesshash{$entry};
683: }
684: }
685: $dumpcount++;
686: }
687:
688: sub courselog {
689: my $what=shift;
690: $what=time.':'.$what;
691: unless ($ENV{'request.course.id'}) { return ''; }
692: $coursedombuf{$ENV{'request.course.id'}}=
693: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
694: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
695: $coursehombuf{$ENV{'request.course.id'}}=
696: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
697: if (defined $courselogs{$ENV{'request.course.id'}}) {
698: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
699: } else {
700: $courselogs{$ENV{'request.course.id'}}.=$what;
701: }
702: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
703: &flushcourselogs();
704: }
705: }
706:
707: sub courseacclog {
708: my $fnsymb=shift;
709: unless ($ENV{'request.course.id'}) { return ''; }
710: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
711: if ($what=~/(problem|exam|quiz|assess|survey|form)$/) {
712: $what.=':POST';
713: foreach (keys %ENV) {
714: if ($_=~/^form\.(.*)/) {
715: $what.=':'.$1.'='.$ENV{$_};
716: }
717: }
718: }
719: &courselog($what);
720: }
721:
722: sub countacc {
723: my $url=&declutter(shift);
724: unless ($ENV{'request.course.id'}) { return ''; }
725: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
726: my $key=$processmarker.'_'.$dumpcount.'___'.$url.'___count';
727: if (defined($accesshash{$key})) {
728: $accesshash{$key}++;
729: } else {
730: $accesshash{$key}=1;
731: }
732: }
733:
734: # ----------------------------------------------------------- Check out an item
735:
736: sub checkout {
737: my ($symb,$tuname,$tudom,$tcrsid)=@_;
738: my $now=time;
739: my $lonhost=$perlvar{'lonHostID'};
740: my $infostr=&escape(
741: $tuname.'&'.
742: $tudom.'&'.
743: $tcrsid.'&'.
744: $symb.'&'.
745: $now.'&'.$ENV{'REMOTE_ADDR'});
746: my $token=&reply('tmpput:'.$infostr,$lonhost);
747: if ($token=~/^error\:/) {
748: &logthis("<font color=blue>WARNING: ".
749: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
750: "</font>");
751: return '';
752: }
753:
754: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
755: $token=~tr/a-z/A-Z/;
756:
757: my %infohash=('resource.0.outtoken' => $token,
758: 'resource.0.checkouttime' => $now,
759: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
760:
761: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
762: return '';
763: } else {
764: &logthis("<font color=blue>WARNING: ".
765: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
766: "</font>");
767: }
768:
769: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
770: &escape('Checkout '.$infostr.' - '.
771: $token)) ne 'ok') {
772: return '';
773: } else {
774: &logthis("<font color=blue>WARNING: ".
775: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
776: "</font>");
777: }
778: return $token;
779: }
780:
781: # ------------------------------------------------------------ Check in an item
782:
783: sub checkin {
784: my $token=shift;
785: my $now=time;
786: my ($ta,$tb,$lonhost)=split(/\*/,$token);
787: $lonhost=~tr/A-Z/a-z/;
788: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
789: $dtoken=~s/\W/\_/g;
790: my ($tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
791: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
792:
793: unless (($tuname) && ($tudom)) {
794: &logthis('Check in '.$token.' ('.$dtoken.') failed');
795: return '';
796: }
797:
798: unless (&allowed('mgr',$tcrsid)) {
799: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
800: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
801: return '';
802: }
803:
804: my %infohash=('resource.0.intoken' => $token,
805: 'resource.0.checkintime' => $now,
806: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
807:
808: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
809: return '';
810: }
811:
812: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
813: &escape('Checkin - '.$token)) ne 'ok') {
814: return '';
815: }
816:
817: return ($symb,$tuname,$tudom,$tcrsid);
818: }
819:
820: # --------------------------------------------- Set Expire Date for Spreadsheet
821:
822: sub expirespread {
823: my ($uname,$udom,$stype,$usymb)=@_;
824: my $cid=$ENV{'request.course.id'};
825: if ($cid) {
826: my $now=time;
827: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
828: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
829: $ENV{'course.'.$cid.'.num'}.
830: ':nohist_expirationdates:'.
831: &escape($key).'='.$now,
832: $ENV{'course.'.$cid.'.home'})
833: }
834: return 'ok';
835: }
836:
837: # ----------------------------------------------------- Devalidate Spreadsheets
838:
839: sub devalidate {
840: my $symb=shift;
841: my $cid=$ENV{'request.course.id'};
842: if ($cid) {
843: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
844: my $status=
845: &del('nohist_calculatedsheet',
846: [$key.'studentcalc'],
847: $ENV{'course.'.$cid.'.domain'},
848: $ENV{'course.'.$cid.'.num'})
849: .' '.
850: &del('nohist_calculatedsheets_'.$cid,
851: [$key.'assesscalc:'.$symb]);
852: unless ($status eq 'ok ok') {
853: &logthis('Could not devalidate spreadsheet '.
854: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
855: $symb.': '.$status);
856: }
857: }
858: }
859:
860: sub hash2str {
861: my (%hash)=@_;
862: my $result='';
863: foreach (keys %hash) { $result.=escape($_).'='.escape($hash{$_}).'&'; }
864: $result=~s/\&$//;
865: return $result;
866: }
867:
868: sub str2hash {
869: my ($string) = @_;
870: my %returnhash;
871: foreach (split(/\&/,$string)) {
872: my ($name,$value)=split(/\=/,$_);
873: $returnhash{&unescape($name)}=&unescape($value);
874: }
875: return %returnhash;
876: }
877:
878: # -------------------------------------------------------------------Temp Store
879:
880: sub tmpreset {
881: my ($symb,$namespace,$domain,$stuname) = @_;
882: if (!$symb) {
883: $symb=&symbread();
884: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
885: }
886: $symb=escape($symb);
887:
888: if (!$namespace) { $namespace=$ENV{'request.state'}; }
889: $namespace=~s/\//\_/g;
890: $namespace=~s/\W//g;
891:
892: #FIXME needs to do something for /pub resources
893: if (!$domain) { $domain=$ENV{'user.domain'}; }
894: if (!$stuname) { $stuname=$ENV{'user.name'}; }
895: my $path=$perlvar{'lonDaemons'}.'/tmp';
896: my %hash;
897: if (tie(%hash,'GDBM_File',
898: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
899: &GDBM_WRCREAT,0640)) {
900: foreach my $key (keys %hash) {
901: if ($key=~ /:$symb/) {
902: delete($hash{$key});
903: }
904: }
905: }
906: }
907:
908: sub tmpstore {
909: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
910:
911: if (!$symb) {
912: $symb=&symbread();
913: if (!$symb) { $symb= $ENV{'request.url'}; }
914: }
915: $symb=escape($symb);
916:
917: if (!$namespace) {
918: # I don't think we would ever want to store this for a course.
919: # it seems this will only be used if we don't have a course.
920: #$namespace=$ENV{'request.course.id'};
921: #if (!$namespace) {
922: $namespace=$ENV{'request.state'};
923: #}
924: }
925: $namespace=~s/\//\_/g;
926: $namespace=~s/\W//g;
927: #FIXME needs to do something for /pub resources
928: if (!$domain) { $domain=$ENV{'user.domain'}; }
929: if (!$stuname) { $stuname=$ENV{'user.name'}; }
930: my $now=time;
931: my %hash;
932: my $path=$perlvar{'lonDaemons'}.'/tmp';
933: if (tie(%hash,'GDBM_File',
934: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
935: &GDBM_WRCREAT,0640)) {
936: $hash{"version:$symb"}++;
937: my $version=$hash{"version:$symb"};
938: my $allkeys='';
939: foreach my $key (keys(%$storehash)) {
940: $allkeys.=$key.':';
941: $hash{"$version:$symb:$key"}=$$storehash{$key};
942: }
943: $hash{"$version:$symb:timestamp"}=$now;
944: $allkeys.='timestamp';
945: $hash{"$version:keys:$symb"}=$allkeys;
946: if (untie(%hash)) {
947: return 'ok';
948: } else {
949: return "error:$!";
950: }
951: } else {
952: return "error:$!";
953: }
954: }
955:
956: # -----------------------------------------------------------------Temp Restore
957:
958: sub tmprestore {
959: my ($symb,$namespace,$domain,$stuname) = @_;
960:
961: if (!$symb) {
962: $symb=&symbread();
963: if (!$symb) { $symb= $ENV{'request.url'}; }
964: }
965: $symb=escape($symb);
966:
967: if (!$namespace) { $namespace=$ENV{'request.state'}; }
968: #FIXME needs to do something for /pub resources
969: if (!$domain) { $domain=$ENV{'user.domain'}; }
970: if (!$stuname) { $stuname=$ENV{'user.name'}; }
971:
972: my %returnhash;
973: $namespace=~s/\//\_/g;
974: $namespace=~s/\W//g;
975: my %hash;
976: my $path=$perlvar{'lonDaemons'}.'/tmp';
977: if (tie(%hash,'GDBM_File',
978: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
979: &GDBM_READER,0640)) {
980: my $version=$hash{"version:$symb"};
981: $returnhash{'version'}=$version;
982: my $scope;
983: for ($scope=1;$scope<=$version;$scope++) {
984: my $vkeys=$hash{"$scope:keys:$symb"};
985: my @keys=split(/:/,$vkeys);
986: my $key;
987: $returnhash{"$scope:keys"}=$vkeys;
988: foreach $key (@keys) {
989: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
990: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
991: }
992: }
993: if (!(untie(%hash))) {
994: return "error:$!";
995: }
996: } else {
997: return "error:$!";
998: }
999: return %returnhash;
1000: }
1001:
1002: # ----------------------------------------------------------------------- Store
1003:
1004: sub store {
1005: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1006: my $home='';
1007:
1008: if ($stuname) { $home=&homeserver($stuname,$domain); }
1009:
1010: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1011:
1012: &devalidate($symb);
1013:
1014: $symb=escape($symb);
1015: if (!$namespace) {
1016: unless ($namespace=$ENV{'request.course.id'}) {
1017: return '';
1018: }
1019: }
1020: if (!$domain) { $domain=$ENV{'user.domain'}; }
1021: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1022: if (!$home) { $home=$ENV{'user.home'}; }
1023: my $namevalue='';
1024: foreach (keys %$storehash) {
1025: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1026: }
1027: $namevalue=~s/\&$//;
1028: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1029: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1030: }
1031:
1032: # -------------------------------------------------------------- Critical Store
1033:
1034: sub cstore {
1035: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1036: my $home='';
1037:
1038: if ($stuname) { $home=&homeserver($stuname,$domain); }
1039:
1040: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1041:
1042: &devalidate($symb);
1043:
1044: $symb=escape($symb);
1045: if (!$namespace) {
1046: unless ($namespace=$ENV{'request.course.id'}) {
1047: return '';
1048: }
1049: }
1050: if (!$domain) { $domain=$ENV{'user.domain'}; }
1051: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1052: if (!$home) { $home=$ENV{'user.home'}; }
1053:
1054: my $namevalue='';
1055: foreach (keys %$storehash) {
1056: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1057: }
1058: $namevalue=~s/\&$//;
1059: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1060: return critical
1061: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1062: }
1063:
1064: # --------------------------------------------------------------------- Restore
1065:
1066: sub restore {
1067: my ($symb,$namespace,$domain,$stuname) = @_;
1068: my $home='';
1069:
1070: if ($stuname) { $home=&homeserver($stuname,$domain); }
1071:
1072: if (!$symb) {
1073: unless ($symb=escape(&symbread())) { return ''; }
1074: } else {
1075: $symb=&escape($symb);
1076: }
1077: if (!$namespace) {
1078: unless ($namespace=$ENV{'request.course.id'}) {
1079: return '';
1080: }
1081: }
1082: if (!$domain) { $domain=$ENV{'user.domain'}; }
1083: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1084: if (!$home) { $home=$ENV{'user.home'}; }
1085: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1086:
1087: my %returnhash=();
1088: foreach (split(/\&/,$answer)) {
1089: my ($name,$value)=split(/\=/,$_);
1090: $returnhash{&unescape($name)}=&unescape($value);
1091: }
1092: my $version;
1093: for ($version=1;$version<=$returnhash{'version'};$version++) {
1094: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1095: $returnhash{$_}=$returnhash{$version.':'.$_};
1096: }
1097: }
1098: return %returnhash;
1099: }
1100:
1101: # ---------------------------------------------------------- Course Description
1102:
1103: sub coursedescription {
1104: my $courseid=shift;
1105: $courseid=~s/^\///;
1106: $courseid=~s/\_/\//g;
1107: my ($cdomain,$cnum)=split(/\//,$courseid);
1108: my $chome=&homeserver($cnum,$cdomain);
1109: if ($chome ne 'no_host') {
1110: my %returnhash=&dump('environment',$cdomain,$cnum);
1111: if (!exists($returnhash{'con_lost'})) {
1112: my $normalid=$cdomain.'_'.$cnum;
1113: my %envhash=();
1114: $returnhash{'home'}= $chome;
1115: $returnhash{'domain'} = $cdomain;
1116: $returnhash{'num'} = $cnum;
1117: while (my ($name,$value) = each %returnhash) {
1118: $envhash{'course.'.$normalid.'.'.$name}=$value;
1119: }
1120: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1121: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1122: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1123: $envhash{'course.'.$normalid.'.last_cache'}=time;
1124: $envhash{'course.'.$normalid.'.home'}=$chome;
1125: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1126: $envhash{'course.'.$normalid.'.num'}=$cnum;
1127: &appenv(%envhash);
1128: return %returnhash;
1129: }
1130: }
1131: return ();
1132: }
1133:
1134: # -------------------------------------------------------- Get user privileges
1135:
1136: sub rolesinit {
1137: my ($domain,$username,$authhost)=@_;
1138: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1139: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1140: my %allroles=();
1141: my %thesepriv=();
1142: my $now=time;
1143: my $userroles="user.login.time=$now\n";
1144: my $thesestr;
1145:
1146: if ($rolesdump ne '') {
1147: foreach (split(/&/,$rolesdump)) {
1148: if ($_!~/^rolesdef\&/) {
1149: my ($area,$role)=split(/=/,$_);
1150: $area=~s/\_\w\w$//;
1151: my ($trole,$tend,$tstart)=split(/_/,$role);
1152: $userroles.='user.role.'.$trole.'.'.$area.'='.
1153: $tstart.'.'.$tend."\n";
1154: if ($tend!=0) {
1155: if ($tend<$now) {
1156: $trole='';
1157: }
1158: }
1159: if ($tstart!=0) {
1160: if ($tstart>$now) {
1161: $trole='';
1162: }
1163: }
1164: if (($area ne '') && ($trole ne '')) {
1165: my $spec=$trole.'.'.$area;
1166: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1167: if ($trole =~ /^cr\//) {
1168: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1169: my $homsvr=homeserver($rauthor,$rdomain);
1170: if ($hostname{$homsvr} ne '') {
1171: my $roledef=
1172: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1173: $homsvr);
1174: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1175: my ($syspriv,$dompriv,$coursepriv)=
1176: split(/\_/,unescape($roledef));
1177: $allroles{'cm./'}.=':'.$syspriv;
1178: $allroles{$spec.'./'}.=':'.$syspriv;
1179: if ($tdomain ne '') {
1180: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1181: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1182: if ($trest ne '') {
1183: $allroles{'cm.'.$area}.=':'.$coursepriv;
1184: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1185: }
1186: }
1187: }
1188: }
1189: } else {
1190: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1191: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1192: if ($tdomain ne '') {
1193: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1194: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1195: if ($trest ne '') {
1196: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1197: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1198: }
1199: }
1200: }
1201: }
1202: }
1203: }
1204: my $adv=0;
1205: my $author=0;
1206: foreach (keys %allroles) {
1207: %thesepriv=();
1208: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1209: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1210: foreach (split(/:/,$allroles{$_})) {
1211: if ($_ ne '') {
1212: my ($privilege,$restrictions)=split(/&/,$_);
1213: if ($restrictions eq '') {
1214: $thesepriv{$privilege}='F';
1215: } else {
1216: if ($thesepriv{$privilege} ne 'F') {
1217: $thesepriv{$privilege}.=$restrictions;
1218: }
1219: }
1220: }
1221: }
1222: $thesestr='';
1223: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1224: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1225: }
1226: $userroles.='user.adv='.$adv."\n".
1227: 'user.author='.$author."\n";
1228: $ENV{'user.adv'}=$adv;
1229: }
1230: return $userroles;
1231: }
1232:
1233: # --------------------------------------------------------------- get interface
1234:
1235: sub get {
1236: my ($namespace,$storearr,$udomain,$uname)=@_;
1237: my $items='';
1238: foreach (@$storearr) {
1239: $items.=escape($_).'&';
1240: }
1241: $items=~s/\&$//;
1242: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1243: if (!$uname) { $uname=$ENV{'user.name'}; }
1244: my $uhome=&homeserver($uname,$udomain);
1245:
1246: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1247: my @pairs=split(/\&/,$rep);
1248: my %returnhash=();
1249: my $i=0;
1250: foreach (@$storearr) {
1251: $returnhash{$_}=unescape($pairs[$i]);
1252: $i++;
1253: }
1254: return %returnhash;
1255: }
1256:
1257: # --------------------------------------------------------------- del interface
1258:
1259: sub del {
1260: my ($namespace,$storearr,$udomain,$uname)=@_;
1261: my $items='';
1262: foreach (@$storearr) {
1263: $items.=escape($_).'&';
1264: }
1265: $items=~s/\&$//;
1266: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1267: if (!$uname) { $uname=$ENV{'user.name'}; }
1268: my $uhome=&homeserver($uname,$udomain);
1269:
1270: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1271: }
1272:
1273: # -------------------------------------------------------------- dump interface
1274:
1275: sub dump {
1276: my ($namespace,$udomain,$uname)=@_;
1277: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1278: if (!$uname) { $uname=$ENV{'user.name'}; }
1279: my $uhome=&homeserver($uname,$udomain);
1280: my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
1281: my @pairs=split(/\&/,$rep);
1282: my %returnhash=();
1283: foreach (@pairs) {
1284: my ($key,$value)=split(/=/,$_);
1285: $returnhash{unescape($key)}=unescape($value);
1286: }
1287: return %returnhash;
1288: }
1289:
1290: # --------------------------------------------------------------- put interface
1291:
1292: sub put {
1293: my ($namespace,$storehash,$udomain,$uname)=@_;
1294: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1295: if (!$uname) { $uname=$ENV{'user.name'}; }
1296: my $uhome=&homeserver($uname,$udomain);
1297: my $items='';
1298: foreach (keys %$storehash) {
1299: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1300: }
1301: $items=~s/\&$//;
1302: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1303: }
1304:
1305: # ------------------------------------------------------ critical put interface
1306:
1307: sub cput {
1308: my ($namespace,$storehash,$udomain,$uname)=@_;
1309: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1310: if (!$uname) { $uname=$ENV{'user.name'}; }
1311: my $uhome=&homeserver($uname,$udomain);
1312: my $items='';
1313: foreach (keys %$storehash) {
1314: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1315: }
1316: $items=~s/\&$//;
1317: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1318: }
1319:
1320: # -------------------------------------------------------------- eget interface
1321:
1322: sub eget {
1323: my ($namespace,$storearr,$udomain,$uname)=@_;
1324: my $items='';
1325: foreach (@$storearr) {
1326: $items.=escape($_).'&';
1327: }
1328: $items=~s/\&$//;
1329: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1330: if (!$uname) { $uname=$ENV{'user.name'}; }
1331: my $uhome=&homeserver($uname,$udomain);
1332: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1333: my @pairs=split(/\&/,$rep);
1334: my %returnhash=();
1335: my $i=0;
1336: foreach (@$storearr) {
1337: $returnhash{$_}=unescape($pairs[$i]);
1338: $i++;
1339: }
1340: return %returnhash;
1341: }
1342:
1343: # ------------------------------------------------- Check for a user privilege
1344:
1345: sub allowed {
1346: my ($priv,$uri)=@_;
1347:
1348: my $orguri=$uri;
1349: $uri=&declutter($uri);
1350:
1351: # Free bre access to adm and meta resources
1352:
1353: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1354: return 'F';
1355: }
1356:
1357: # Free bre to public access
1358:
1359: if ($priv eq 'bre') {
1360: if (&metadata($uri,'copyright') eq 'public') { return 'F'; }
1361: }
1362:
1363: my $thisallowed='';
1364: my $statecond=0;
1365: my $courseprivid='';
1366:
1367: # Course
1368:
1369: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1370: $thisallowed.=$1;
1371: }
1372:
1373: # Domain
1374:
1375: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1376: =~/$priv\&([^\:]*)/) {
1377: $thisallowed.=$1;
1378: }
1379:
1380: # Course: uri itself is a course
1381: my $courseuri=$uri;
1382: $courseuri=~s/\_(\d)/\/$1/;
1383: $courseuri=~s/^([^\/])/\/$1/;
1384:
1385: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1386: =~/$priv\&([^\:]*)/) {
1387: $thisallowed.=$1;
1388: }
1389:
1390: # Full access at system, domain or course-wide level? Exit.
1391:
1392: if ($thisallowed=~/F/) {
1393: return 'F';
1394: }
1395:
1396: # If this is generating or modifying users, exit with special codes
1397:
1398: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1399: return $thisallowed;
1400: }
1401: #
1402: # Gathered so far: system, domain and course wide privileges
1403: #
1404: # Course: See if uri or referer is an individual resource that is part of
1405: # the course
1406:
1407: if ($ENV{'request.course.id'}) {
1408: $courseprivid=$ENV{'request.course.id'};
1409: if ($ENV{'request.course.sec'}) {
1410: $courseprivid.='/'.$ENV{'request.course.sec'};
1411: }
1412: $courseprivid=~s/\_/\//;
1413: my $checkreferer=1;
1414: my @uriparts=split(/\//,$uri);
1415: my $filename=$uriparts[$#uriparts];
1416: my $pathname=$uri;
1417: $pathname=~s/\/$filename$//;
1418: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1419: /\&$filename\:([\d\|]+)\&/) {
1420: $statecond=$1;
1421: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1422: =~/$priv\&([^\:]*)/) {
1423: $thisallowed.=$1;
1424: $checkreferer=0;
1425: }
1426: }
1427:
1428: if ($checkreferer) {
1429: my $refuri=$ENV{'httpref.'.$orguri};
1430:
1431: unless ($refuri) {
1432: foreach (keys %ENV) {
1433: if ($_=~/^httpref\..*\*/) {
1434: my $pattern=$_;
1435: $pattern=~s/^httpref\.\/res\///;
1436: $pattern=~s/\*/\[\^\/\]\+/g;
1437: $pattern=~s/\//\\\//g;
1438: if ($orguri=~/$pattern/) {
1439: $refuri=$ENV{$_};
1440: }
1441: }
1442: }
1443: }
1444: if ($refuri) {
1445: $refuri=&declutter($refuri);
1446: my @uriparts=split(/\//,$refuri);
1447: my $filename=$uriparts[$#uriparts];
1448: my $pathname=$refuri;
1449: $pathname=~s/\/$filename$//;
1450: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1451: /\&$filename\:([\d\|]+)\&/) {
1452: my $refstatecond=$1;
1453: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1454: =~/$priv\&([^\:]*)/) {
1455: $thisallowed.=$1;
1456: $uri=$refuri;
1457: $statecond=$refstatecond;
1458: }
1459: }
1460: }
1461: }
1462: }
1463:
1464: #
1465: # Gathered now: all privileges that could apply, and condition number
1466: #
1467: #
1468: # Full or no access?
1469: #
1470:
1471: if ($thisallowed=~/F/) {
1472: return 'F';
1473: }
1474:
1475: unless ($thisallowed) {
1476: return '';
1477: }
1478:
1479: # Restrictions exist, deal with them
1480: #
1481: # C:according to course preferences
1482: # R:according to resource settings
1483: # L:unless locked
1484: # X:according to user session state
1485: #
1486:
1487: # Possibly locked functionality, check all courses
1488: # Locks might take effect only after 10 minutes cache expiration for other
1489: # courses, and 2 minutes for current course
1490:
1491: my $envkey;
1492: if ($thisallowed=~/L/) {
1493: foreach $envkey (keys %ENV) {
1494: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1495: my $courseid=$2;
1496: my $roleid=$1.'.'.$2;
1497: $courseid=~s/^\///;
1498: my $expiretime=600;
1499: if ($ENV{'request.role'} eq $roleid) {
1500: $expiretime=120;
1501: }
1502: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1503: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1504: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1505: &coursedescription($courseid);
1506: }
1507: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1508: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1509: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1510: &log($ENV{'user.domain'},$ENV{'user.name'},
1511: $ENV{'user.host'},
1512: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1513: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1514: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1515: return '';
1516: }
1517: }
1518: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1519: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1520: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1521: &log($ENV{'user.domain'},$ENV{'user.name'},
1522: $ENV{'user.host'},
1523: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1524: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1525: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1526: return '';
1527: }
1528: }
1529: }
1530: }
1531: }
1532:
1533: #
1534: # Rest of the restrictions depend on selected course
1535: #
1536:
1537: unless ($ENV{'request.course.id'}) {
1538: return '1';
1539: }
1540:
1541: #
1542: # Now user is definitely in a course
1543: #
1544:
1545:
1546: # Course preferences
1547:
1548: if ($thisallowed=~/C/) {
1549: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1550: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1551: =~/\,$rolecode\,/) {
1552: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1553: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1554: $ENV{'request.course.id'});
1555: return '';
1556: }
1557: }
1558:
1559: # Resource preferences
1560:
1561: if ($thisallowed=~/R/) {
1562: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1563: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1564: if (-e $filename) {
1565: my @content;
1566: {
1567: my $fh=Apache::File->new($filename);
1568: @content=<$fh>;
1569: }
1570: if (join('',@content)=~
1571: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1572: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1573: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1574: return '';
1575:
1576: }
1577: }
1578: }
1579:
1580: # Restricted by state?
1581:
1582: if ($thisallowed=~/X/) {
1583: if (&condval($statecond)) {
1584: return '2';
1585: } else {
1586: return '';
1587: }
1588: }
1589:
1590: return 'F';
1591: }
1592:
1593: # ----------------------------------------------------------------- Define Role
1594:
1595: sub definerole {
1596: if (allowed('mcr','/')) {
1597: my ($rolename,$sysrole,$domrole,$courole)=@_;
1598: foreach (split('/',$sysrole)) {
1599: my ($crole,$cqual)=split(/\&/,$_);
1600: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1601: if ($pr{'cr:s'}=~/$crole\&/) {
1602: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1603: return "refused:s:$crole&$cqual";
1604: }
1605: }
1606: }
1607: foreach (split('/',$domrole)) {
1608: my ($crole,$cqual)=split(/\&/,$_);
1609: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1610: if ($pr{'cr:d'}=~/$crole\&/) {
1611: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1612: return "refused:d:$crole&$cqual";
1613: }
1614: }
1615: }
1616: foreach (split('/',$courole)) {
1617: my ($crole,$cqual)=split(/\&/,$_);
1618: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1619: if ($pr{'cr:c'}=~/$crole\&/) {
1620: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1621: return "refused:c:$crole&$cqual";
1622: }
1623: }
1624: }
1625: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1626: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1627: "rolesdef_$rolename=".
1628: escape($sysrole.'_'.$domrole.'_'.$courole);
1629: return reply($command,$ENV{'user.home'});
1630: } else {
1631: return 'refused';
1632: }
1633: }
1634:
1635: # ---------------- Make a metadata query against the network of library servers
1636:
1637: sub metadata_query {
1638: my ($query,$custom,$customshow)=@_;
1639: my %rhash;
1640: for my $server (keys %libserv) {
1641: unless ($custom or $customshow) {
1642: my $reply=&reply("querysend:".&escape($query),$server);
1643: $rhash{$server}=$reply;
1644: }
1645: else {
1646: my $reply=&reply("querysend:".&escape($query).':'.
1647: &escape($custom).':'.&escape($customshow),
1648: $server);
1649: $rhash{$server}=$reply;
1650: }
1651: }
1652: return \%rhash;
1653: }
1654:
1655: # ------------------------------------------------------------------ Plain Text
1656:
1657: sub plaintext {
1658: my $short=shift;
1659: return $prp{$short};
1660: }
1661:
1662: # ----------------------------------------------------------------- Assign Role
1663:
1664: sub assignrole {
1665: my ($udom,$uname,$url,$role,$end,$start)=@_;
1666: my $mrole;
1667: if ($role =~ /^cr\//) {
1668: unless (&allowed('ccr',$url)) {
1669: &logthis('Refused custom assignrole: '.
1670: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1671: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1672: return 'refused';
1673: }
1674: $mrole='cr';
1675: } else {
1676: my $cwosec=$url;
1677: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1678: unless (&allowed('c'.$role,$cwosec)) {
1679: &logthis('Refused assignrole: '.
1680: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1681: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1682: return 'refused';
1683: }
1684: $mrole=$role;
1685: }
1686: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1687: "$udom:$uname:$url".'_'."$mrole=$role";
1688: if ($end) { $command.='_'.$end; }
1689: if ($start) {
1690: if ($end) {
1691: $command.='_'.$start;
1692: } else {
1693: $command.='_0_'.$start;
1694: }
1695: }
1696: return &reply($command,&homeserver($uname,$udom));
1697: }
1698:
1699: # -------------------------------------------------- Modify user authentication
1700: sub modifyuserauth {
1701: my ($udom,$uname,$umode,$upass)=@_;
1702: my $uhome=&homeserver($uname,$udom);
1703: &logthis('Call to modify user authentication'.$udom.', '.$uname.', '.
1704: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1705: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
1706: &escape($upass),$uhome);
1707: unless ($reply eq 'ok') {
1708: return 'error: '.$reply;
1709: }
1710: return 'ok';
1711: }
1712:
1713: # --------------------------------------------------------------- Modify a user
1714:
1715:
1716: sub modifyuser {
1717: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1718: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1719: $umode.', '.$first.', '.$middle.', '.
1720: $last.', '.$gene.' by '.
1721: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1722: my $uhome=&homeserver($uname,$udom);
1723: # ----------------------------------------------------------------- Create User
1724: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1725: my $unhome='';
1726: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1727: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1728: } else {
1729: my $tryserver;
1730: my $loadm=10000000;
1731: foreach $tryserver (keys %libserv) {
1732: if ($hostdom{$tryserver} eq $udom) {
1733: my $answer=reply('load',$tryserver);
1734: if (($answer=~/\d+/) && ($answer<$loadm)) {
1735: $loadm=$answer;
1736: $unhome=$tryserver;
1737: }
1738: }
1739: }
1740: }
1741: if (($unhome eq '') || ($unhome eq 'no_host')) {
1742: return 'error: find home';
1743: }
1744: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1745: &escape($upass),$unhome);
1746: unless ($reply eq 'ok') {
1747: return 'error: '.$reply;
1748: }
1749: $uhome=&homeserver($uname,$udom);
1750: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1751: return 'error: verify home';
1752: }
1753: }
1754: # ---------------------------------------------------------------------- Add ID
1755: if ($uid) {
1756: $uid=~tr/A-Z/a-z/;
1757: my %uidhash=&idrget($udom,$uname);
1758: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1759: unless ($uid eq $uidhash{$uname}) {
1760: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1761: }
1762: } else {
1763: &idput($udom,($uname => $uid));
1764: }
1765: }
1766: # -------------------------------------------------------------- Add names, etc
1767: my %names=&get('environment',
1768: ['firstname','middlename','lastname','generation'],
1769: $udom,$uname);
1770: if ($first) { $names{'firstname'} = $first; }
1771: if ($middle) { $names{'middlename'} = $middle; }
1772: if ($last) { $names{'lastname'} = $last; }
1773: if ($gene) { $names{'generation'} = $gene; }
1774: my $reply = &put('environment', \%names, $udom,$uname);
1775: if ($reply ne 'ok') { return 'error: '.$reply; }
1776: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1777: $umode.', '.$first.', '.$middle.', '.
1778: $last.', '.$gene.' by '.
1779: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1780: return 'ok';
1781: }
1782:
1783: # -------------------------------------------------------------- Modify student
1784:
1785: sub modifystudent {
1786: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1787: $end,$start)=@_;
1788: my $cid='';
1789: unless ($cid=$ENV{'request.course.id'}) {
1790: return 'not_in_class';
1791: }
1792: # --------------------------------------------------------------- Make the user
1793: my $reply=&modifyuser
1794: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1795: unless ($reply eq 'ok') { return $reply; }
1796: my $uhome=&homeserver($uname,$udom);
1797: if (($uhome eq '') || ($uhome eq 'no_host')) {
1798: return 'error: no such user';
1799: }
1800: # -------------------------------------------------- Add student to course list
1801: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1802: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1803: &escape($uname.':'.$udom).'='.
1804: &escape($end.':'.$start),
1805: $ENV{'course.'.$cid.'.home'});
1806: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1807: return 'error: '.$reply;
1808: }
1809: # ---------------------------------------------------- Add student role to user
1810: my $uurl='/'.$cid;
1811: $uurl=~s/\_/\//g;
1812: if ($usec) {
1813: $uurl.='/'.$usec;
1814: }
1815: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1816: }
1817:
1818: # ------------------------------------------------- Write to course preferences
1819:
1820: sub writecoursepref {
1821: my ($courseid,%prefs)=@_;
1822: $courseid=~s/^\///;
1823: $courseid=~s/\_/\//g;
1824: my ($cdomain,$cnum)=split(/\//,$courseid);
1825: my $chome=homeserver($cnum,$cdomain);
1826: if (($chome eq '') || ($chome eq 'no_host')) {
1827: return 'error: no such course';
1828: }
1829: my $cstring='';
1830: foreach (keys %prefs) {
1831: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1832: }
1833: $cstring=~s/\&$//;
1834: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1835: }
1836:
1837: # ---------------------------------------------------------- Make/modify course
1838:
1839: sub createcourse {
1840: my ($udom,$description,$url)=@_;
1841: $url=&declutter($url);
1842: my $cid='';
1843: unless (&allowed('ccc',$ENV{'user.domain'})) {
1844: return 'refused';
1845: }
1846: unless ($udom eq $ENV{'user.domain'}) {
1847: return 'refused';
1848: }
1849: # ------------------------------------------------------------------- Create ID
1850: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1851: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1852: # ----------------------------------------------- Make sure that does not exist
1853: my $uhome=&homeserver($uname,$udom);
1854: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1855: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1856: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1857: $uhome=&homeserver($uname,$udom);
1858: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1859: return 'error: unable to generate unique course-ID';
1860: }
1861: }
1862: # ------------------------------------------------------------- Make the course
1863: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1864: $ENV{'user.home'});
1865: unless ($reply eq 'ok') { return 'error: '.$reply; }
1866: $uhome=&homeserver($uname,$udom);
1867: if (($uhome eq '') || ($uhome eq 'no_host')) {
1868: return 'error: no such course';
1869: }
1870: &writecoursepref($udom.'_'.$uname,
1871: ('description' => $description,
1872: 'url' => $url));
1873: return '/'.$udom.'/'.$uname;
1874: }
1875:
1876: # ---------------------------------------------------------- Assign Custom Role
1877:
1878: sub assigncustomrole {
1879: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1880: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1881: $end,$start);
1882: }
1883:
1884: # ----------------------------------------------------------------- Revoke Role
1885:
1886: sub revokerole {
1887: my ($udom,$uname,$url,$role)=@_;
1888: my $now=time;
1889: return &assignrole($udom,$uname,$url,$role,$now);
1890: }
1891:
1892: # ---------------------------------------------------------- Revoke Custom Role
1893:
1894: sub revokecustomrole {
1895: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1896: my $now=time;
1897: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1898: }
1899:
1900: # ------------------------------------------------------------ Directory lister
1901:
1902: sub dirlist {
1903: my $uri=shift;
1904: $uri=~s/^\///;
1905: $uri=~s/\/$//;
1906: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1907: if ($udom) {
1908: if ($uname) {
1909: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1910: homeserver($uname,$udom));
1911: return split(/:/,$listing);
1912: } else {
1913: my $tryserver;
1914: my %allusers=();
1915: foreach $tryserver (keys %libserv) {
1916: if ($hostdom{$tryserver} eq $udom) {
1917: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1918: $tryserver);
1919: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1920: && ($listing ne 'con_lost')) {
1921: foreach (split(/:/,$listing)) {
1922: my ($entry,@stat)=split(/&/,$_);
1923: $allusers{$entry}=1;
1924: }
1925: }
1926: }
1927: }
1928: my $alluserstr='';
1929: foreach (sort keys %allusers) {
1930: $alluserstr.=$_.'&user:';
1931: }
1932: $alluserstr=~s/:$//;
1933: return split(/:/,$alluserstr);
1934: }
1935: } else {
1936: my $tryserver;
1937: my %alldom=();
1938: foreach $tryserver (keys %libserv) {
1939: $alldom{$hostdom{$tryserver}}=1;
1940: }
1941: my $alldomstr='';
1942: foreach (sort keys %alldom) {
1943: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1944: }
1945: $alldomstr=~s/:$//;
1946: return split(/:/,$alldomstr);
1947: }
1948: }
1949:
1950: # -------------------------------------------------------- Value of a Condition
1951:
1952: sub directcondval {
1953: my $number=shift;
1954: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1955: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1956: } else {
1957: return 2;
1958: }
1959: }
1960:
1961: sub condval {
1962: my $condidx=shift;
1963: my $result=0;
1964: my $allpathcond='';
1965: foreach (split(/\|/,$condidx)) {
1966: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1967: $allpathcond.=
1968: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1969: }
1970: }
1971: $allpathcond=~s/\|$//;
1972: if ($ENV{'request.course.id'}) {
1973: if ($allpathcond) {
1974: my $operand='|';
1975: my @stack;
1976: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
1977: if ($_ eq '(') {
1978: push @stack,($operand,$result)
1979: } elsif ($_ eq ')') {
1980: my $before=pop @stack;
1981: if (pop @stack eq '&') {
1982: $result=$result>$before?$before:$result;
1983: } else {
1984: $result=$result>$before?$result:$before;
1985: }
1986: } elsif (($_ eq '&') || ($_ eq '|')) {
1987: $operand=$_;
1988: } else {
1989: my $new=directcondval($_);
1990: if ($operand eq '&') {
1991: $result=$result>$new?$new:$result;
1992: } else {
1993: $result=$result>$new?$result:$new;
1994: }
1995: }
1996: }
1997: }
1998: }
1999: return $result;
2000: }
2001:
2002: # --------------------------------------------------------- Value of a Variable
2003:
2004: sub EXT {
2005: my ($varname,$symbparm)=@_;
2006: unless ($varname) { return ''; }
2007: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2008: my $rest;
2009: if ($therest[0]) {
2010: $rest=join('.',@therest);
2011: } else {
2012: $rest='';
2013: }
2014: my $qualifierrest=$qualifier;
2015: if ($rest) { $qualifierrest.='.'.$rest; }
2016: my $spacequalifierrest=$space;
2017: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2018: if ($realm eq 'user') {
2019: # --------------------------------------------------------------- user.resource
2020: if ($space eq 'resource') {
2021: my %restored=&restore();
2022: return $restored{$qualifierrest};
2023: # ----------------------------------------------------------------- user.access
2024: } elsif ($space eq 'access') {
2025: return &allowed($qualifier,$rest);
2026: # ------------------------------------------ user.preferences, user.environment
2027: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2028: return $ENV{join('.',('environment',$qualifierrest))};
2029: # ----------------------------------------------------------------- user.course
2030: } elsif ($space eq 'course') {
2031: return $ENV{join('.',('request.course',$qualifier))};
2032: # ------------------------------------------------------------------- user.role
2033: } elsif ($space eq 'role') {
2034: my ($role,$where)=split(/\./,$ENV{'request.role'});
2035: if ($qualifier eq 'value') {
2036: return $role;
2037: } elsif ($qualifier eq 'extent') {
2038: return $where;
2039: }
2040: # ----------------------------------------------------------------- user.domain
2041: } elsif ($space eq 'domain') {
2042: return $ENV{'user.domain'};
2043: # ------------------------------------------------------------------- user.name
2044: } elsif ($space eq 'name') {
2045: return $ENV{'user.name'};
2046: # ---------------------------------------------------- Any other user namespace
2047: } else {
2048: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2049: my %reply=&get($space,[$item]);
2050: return $reply{$item};
2051: }
2052: } elsif ($realm eq 'request') {
2053: # ------------------------------------------------------------- request.browser
2054: if ($space eq 'browser') {
2055: return $ENV{'browser.'.$qualifier};
2056: # ------------------------------------------------------------ request.filename
2057: } else {
2058: return $ENV{'request.'.$spacequalifierrest};
2059: }
2060: } elsif ($realm eq 'course') {
2061: # ---------------------------------------------------------- course.description
2062: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
2063: $spacequalifierrest};
2064: } elsif ($realm eq 'resource') {
2065: if ($ENV{'request.course.id'}) {
2066:
2067: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2068:
2069:
2070: # ----------------------------------------------------- Cascading lookup scheme
2071: my $symbp;
2072: if ($symbparm) {
2073: $symbp=$symbparm;
2074: } else {
2075: $symbp=&symbread();
2076: }
2077: my $mapp=(split(/\_\_\_/,$symbp))[0];
2078:
2079: my $symbparm=$symbp.'.'.$spacequalifierrest;
2080: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2081:
2082: my $seclevel=
2083: $ENV{'request.course.id'}.'.['.
2084: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
2085: my $seclevelr=
2086: $ENV{'request.course.id'}.'.['.
2087: $ENV{'request.course.sec'}.'].'.$symbparm;
2088: my $seclevelm=
2089: $ENV{'request.course.id'}.'.['.
2090: $ENV{'request.course.sec'}.'].'.$mapparm;
2091:
2092: my $courselevel=
2093: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
2094: my $courselevelr=
2095: $ENV{'request.course.id'}.'.'.$symbparm;
2096: my $courselevelm=
2097: $ENV{'request.course.id'}.'.'.$mapparm;
2098:
2099: # ----------------------------------------------------------- first, check user
2100: my %resourcedata=get('resourcedata',
2101: [$courselevelr,$courselevelm,$courselevel]);
2102: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2103: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2104:
2105: if ($resourcedata{$courselevelr}) {
2106: return $resourcedata{$courselevelr}; }
2107: if ($resourcedata{$courselevelm}) {
2108: return $resourcedata{$courselevelm}; }
2109: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
2110:
2111: } else {
2112: if ($resourcedata{$courselevelr}!~/No such file/) {
2113: &logthis("<font color=blue>WARNING:".
2114: " Trying to get resource data for ".$ENV{'user.name'}." at "
2115: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
2116: "</font>");
2117: }
2118: }
2119:
2120: # -------------------------------------------------------- second, check course
2121:
2122: my $reply=&reply('get:'.
2123: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
2124: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2125: ':resourcedata:'.
2126: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
2127: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
2128: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
2129: if ($reply!~/^error\:/) {
2130: foreach (split(/\&/,$reply)) {
2131: if ($_) { return &unescape($_); }
2132: }
2133: }
2134: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
2135: &logthis("<font color=blue>WARNING:".
2136: " Getting ".$reply." asking for ".$varname." for ".
2137: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2138: ' at '.
2139: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
2140: ' from '.
2141: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
2142: "</font>");
2143: }
2144: # ------------------------------------------------------ third, check map parms
2145: my %parmhash=();
2146: my $thisparm='';
2147: if (tie(%parmhash,'GDBM_File',
2148: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
2149: $thisparm=$parmhash{$symbparm};
2150: untie(%parmhash);
2151: }
2152: if ($thisparm) { return $thisparm; }
2153: }
2154:
2155: # --------------------------------------------- last, look in resource metadata
2156:
2157: $spacequalifierrest=~s/\./\_/;
2158: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2159: if ($metadata) { return $metadata; }
2160: $metadata=&metadata($ENV{'request.filename'},
2161: 'parameter_'.$spacequalifierrest);
2162: if ($metadata) { return $metadata; }
2163:
2164: # ------------------------------------------------------------------ Cascade up
2165:
2166: unless ($space eq '0') {
2167: my ($part,$id)=split(/\_/,$space);
2168: if ($id) {
2169: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2170: $symbparm);
2171: if ($partgeneral) { return $partgeneral; }
2172: } else {
2173: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2174: $symbparm);
2175: if ($resourcegeneral) { return $resourcegeneral; }
2176: }
2177: }
2178:
2179: # ---------------------------------------------------- Any other user namespace
2180: } elsif ($realm eq 'environment') {
2181: # ----------------------------------------------------------------- environment
2182: return $ENV{'environment.'.$spacequalifierrest};
2183: } elsif ($realm eq 'system') {
2184: # ----------------------------------------------------------------- system.time
2185: if ($space eq 'time') {
2186: return time;
2187: }
2188: }
2189: return '';
2190: }
2191:
2192: # ---------------------------------------------------------------- Get metadata
2193:
2194: sub metadata {
2195: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2196:
2197: $uri=&declutter($uri);
2198: my $filename=$uri;
2199: $uri=~s/\.meta$//;
2200: #
2201: # Is the metadata already cached?
2202: # Look at timestamp of caching
2203: # Everything is cached by the main uri, libraries are never directly cached
2204: #
2205: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2206: #
2207: # Is this a recursive call for a library?
2208: #
2209: if ($liburi) {
2210: $liburi=&declutter($liburi);
2211: $filename=$liburi;
2212: }
2213: my %metathesekeys=();
2214: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2215: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2216: my $parser=HTML::TokeParser->new(\$metastring);
2217: my $token;
2218: undef %metathesekeys;
2219: while ($token=$parser->get_token) {
2220: if ($token->[0] eq 'S') {
2221: if (defined($token->[2]->{'package'})) {
2222: #
2223: # This is a package - get package info
2224: #
2225: my $package=$token->[2]->{'package'};
2226: my $keyroot='';
2227: if ($prefix) {
2228: $keyroot.='_'.$prefix;
2229: } else {
2230: if (defined($token->[2]->{'part'})) {
2231: $keyroot.='_'.$token->[2]->{'part'};
2232: }
2233: }
2234: if (defined($token->[2]->{'id'})) {
2235: $keyroot.='_'.$token->[2]->{'id'};
2236: }
2237: if ($metacache{$uri.':packages'}) {
2238: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2239: } else {
2240: $metacache{$uri.':packages'}=$package.$keyroot;
2241: }
2242: foreach (keys %packagetab) {
2243: if ($_=~/^$package\&/) {
2244: my ($pack,$name,$subp)=split(/\&/,$_);
2245: my $value=$packagetab{$_};
2246: my $part=$keyroot;
2247: $part=~s/^\_//;
2248: if ($subp eq 'display') {
2249: $value.=' [Part: '.$part.']';
2250: }
2251: my $unikey='parameter'.$keyroot.'_'.$name;
2252: $metathesekeys{$unikey}=1;
2253: $metacache{$uri.':'.$unikey.'.part'}=$part;
2254: unless
2255: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2256: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2257: }
2258: }
2259: }
2260: } else {
2261: #
2262: # This is not a package - some other kind of start tag
2263: #
2264: my $entry=$token->[1];
2265: my $unikey;
2266: if ($entry eq 'import') {
2267: $unikey='';
2268: } else {
2269: $unikey=$entry;
2270: }
2271: if ($prefix) {
2272: $unikey.=$prefix;
2273: } else {
2274: if (defined($token->[2]->{'part'})) {
2275: $unikey.='_'.$token->[2]->{'part'};
2276: }
2277: }
2278: if (defined($token->[2]->{'id'})) {
2279: $unikey.='_'.$token->[2]->{'id'};
2280: }
2281:
2282: if ($entry eq 'import') {
2283: #
2284: # Importing a library here
2285: #
2286: if (defined($depthcount)) { $depthcount++; } else
2287: { $depthcount=0; }
2288: if ($depthcount<20) {
2289: foreach (split(/\,/,&metadata($uri,'keys',
2290: $parser->get_text('/import'),$unikey,
2291: $depthcount))) {
2292: $metathesekeys{$_}=1;
2293: }
2294: }
2295: } else {
2296:
2297: if (defined($token->[2]->{'name'})) {
2298: $unikey.='_'.$token->[2]->{'name'};
2299: }
2300: $metathesekeys{$unikey}=1;
2301: foreach (@{$token->[3]}) {
2302: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2303: }
2304: unless (
2305: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
2306: ) { $metacache{$uri.':'.$unikey}=
2307: $metacache{$uri.':'.$unikey.'.default'};
2308: }
2309: # end of not-a-package not-a-library import
2310: }
2311: # end of not-a-package start tag
2312: }
2313: # the next is the end of "start tag"
2314: }
2315: }
2316: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2317: $metacache{$uri.':cachedtimestamp'}=time;
2318: # this is the end of "was not already recently cached
2319: }
2320: return $metacache{$uri.':'.$what};
2321: }
2322:
2323: # ------------------------------------------------- Update symbolic store links
2324:
2325: sub symblist {
2326: my ($mapname,%newhash)=@_;
2327: $mapname=declutter($mapname);
2328: my %hash;
2329: if (($ENV{'request.course.fn'}) && (%newhash)) {
2330: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2331: &GDBM_WRCREAT,0640)) {
2332: foreach (keys %newhash) {
2333: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2334: }
2335: if (untie(%hash)) {
2336: return 'ok';
2337: }
2338: }
2339: }
2340: return 'error';
2341: }
2342:
2343: # ------------------------------------------------------ Return symb list entry
2344:
2345: sub symbread {
2346: my $thisfn=shift;
2347: unless ($thisfn) {
2348: if ($ENV{'request.symb'}) { return $ENV{'request.symb'}; }
2349: $thisfn=$ENV{'request.filename'};
2350: }
2351: $thisfn=declutter($thisfn);
2352: my %hash;
2353: my %bighash;
2354: my $syval='';
2355: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2356: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2357: &GDBM_READER,0640)) {
2358: $syval=$hash{$thisfn};
2359: untie(%hash);
2360: }
2361: # ---------------------------------------------------------- There was an entry
2362: if ($syval) {
2363: unless ($syval=~/\_\d+$/) {
2364: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2365: &appenv('request.ambiguous' => $thisfn);
2366: return '';
2367: }
2368: $syval.=$1;
2369: }
2370: } else {
2371: # ------------------------------------------------------- Was not in symb table
2372: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2373: &GDBM_READER,0640)) {
2374: # ---------------------------------------------- Get ID(s) for current resource
2375: my $ids=$bighash{'ids_/res/'.$thisfn};
2376: unless ($ids) {
2377: $ids=$bighash{'ids_/'.$thisfn};
2378: }
2379: if ($ids) {
2380: # ------------------------------------------------------------------- Has ID(s)
2381: my @possibilities=split(/\,/,$ids);
2382: if ($#possibilities==0) {
2383: # ----------------------------------------------- There is only one possibility
2384: my ($mapid,$resid)=split(/\./,$ids);
2385: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2386: } else {
2387: # ------------------------------------------ There is more than one possibility
2388: my $realpossible=0;
2389: foreach (@possibilities) {
2390: my $file=$bighash{'src_'.$_};
2391: if (&allowed('bre',$file)) {
2392: my ($mapid,$resid)=split(/\./,$_);
2393: if ($bighash{'map_type_'.$mapid} ne 'page') {
2394: $realpossible++;
2395: $syval=declutter($bighash{'map_id_'.$mapid}).
2396: '___'.$resid;
2397: }
2398: }
2399: }
2400: if ($realpossible!=1) { $syval=''; }
2401: }
2402: }
2403: untie(%bighash)
2404: }
2405: }
2406: if ($syval) {
2407: return $syval.'___'.$thisfn;
2408: }
2409: }
2410: &appenv('request.ambiguous' => $thisfn);
2411: return '';
2412: }
2413:
2414: # ---------------------------------------------------------- Return random seed
2415:
2416: sub numval {
2417: my $txt=shift;
2418: $txt=~tr/A-J/0-9/;
2419: $txt=~tr/a-j/0-9/;
2420: $txt=~tr/K-T/0-9/;
2421: $txt=~tr/k-t/0-9/;
2422: $txt=~tr/U-Z/0-5/;
2423: $txt=~tr/u-z/0-5/;
2424: $txt=~s/\D//g;
2425: return int($txt);
2426: }
2427:
2428: sub rndseed {
2429: my ($symb,$courseid,$domain,$username)=@_;
2430: if (!$symb) {
2431: unless ($symb=&symbread()) { return time; }
2432: }
2433: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2434: if (!$domain) {$domain=$ENV{'user.domain'};}
2435: if (!$username) {$username=$ENV{'user.name'};}
2436: {
2437: use integer;
2438: my $symbchck=unpack("%32C*",$symb) << 27;
2439: my $symbseed=numval($symb) << 22;
2440: my $namechck=unpack("%32C*",$username) << 17;
2441: my $nameseed=numval($username) << 12;
2442: my $domainseed=unpack("%32C*",$domain) << 7;
2443: my $courseseed=unpack("%32C*",$courseid);
2444: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2445: #uncommenting these lines can break things!
2446: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2447: #&Apache::lonxml::debug("rndseed :$num:$symb");
2448: return $num;
2449: }
2450: }
2451:
2452: sub ireceipt {
2453: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2454: my $cuname=unpack("%32C*",$funame);
2455: my $cudom=unpack("%32C*",$fudom);
2456: my $cucourseid=unpack("%32C*",$fucourseid);
2457: my $cusymb=unpack("%32C*",$fusymb);
2458: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2459: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2460: ($cunique%$cuname+
2461: $cunique%$cudom+
2462: $cusymb%$cuname+
2463: $cusymb%$cudom+
2464: $cucourseid%$cuname+
2465: $cucourseid%$cudom);
2466: }
2467:
2468: sub receipt {
2469: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2470: $ENV{'request.course.id'},&symbread());
2471: }
2472:
2473: # ------------------------------------------------------------ Serves up a file
2474: # returns either the contents of the file or a -1
2475: sub getfile {
2476: my $file=shift;
2477: &repcopy($file);
2478: if (! -e $file ) { return -1; };
2479: my $fh=Apache::File->new($file);
2480: my $a='';
2481: while (<$fh>) { $a .=$_; }
2482: return $a
2483: }
2484:
2485: sub filelocation {
2486: my ($dir,$file) = @_;
2487: my $location;
2488: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2489: if ($file=~m:^/~:) { # is a contruction space reference
2490: $location = $file;
2491: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2492: } else {
2493: $file=~s/^$perlvar{'lonDocRoot'}//;
2494: $file=~s:^/*res::;
2495: if ( !( $file =~ m:^/:) ) {
2496: $location = $dir. '/'.$file;
2497: } else {
2498: $location = '/home/httpd/html/res'.$file;
2499: }
2500: }
2501: $location=~s://+:/:g; # remove duplicate /
2502: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2503: return $location;
2504: }
2505:
2506: sub hreflocation {
2507: my ($dir,$file)=@_;
2508: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
2509: my $finalpath=filelocation($dir,$file);
2510: $finalpath=~s/^\/home\/httpd\/html//;
2511: return $finalpath;
2512: } else {
2513: return $file;
2514: }
2515: }
2516:
2517: # ------------------------------------------------------------- Declutters URLs
2518:
2519: sub declutter {
2520: my $thisfn=shift;
2521: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2522: $thisfn=~s/^\///;
2523: $thisfn=~s/^res\///;
2524: return $thisfn;
2525: }
2526:
2527: # -------------------------------------------------------- Escape Special Chars
2528:
2529: sub escape {
2530: my $str=shift;
2531: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2532: return $str;
2533: }
2534:
2535: # ----------------------------------------------------- Un-Escape Special Chars
2536:
2537: sub unescape {
2538: my $str=shift;
2539: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2540: return $str;
2541: }
2542:
2543: # ================================================================ Main Program
2544:
2545: sub goodbye {
2546: &flushcourselogs();
2547: &logthis("Shutting down");
2548: }
2549:
2550: BEGIN {
2551: # ------------------------------------------------------------ Read access.conf
2552: {
2553: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2554:
2555: while (my $configline=<$config>) {
2556: if ($configline =~ /PerlSetVar/) {
2557: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2558: chomp($varvalue);
2559: $perlvar{$varname}=$varvalue;
2560: }
2561: }
2562: }
2563:
2564: # ------------------------------------------------------------- Read hosts file
2565: {
2566: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2567:
2568: while (my $configline=<$config>) {
2569: chomp($configline);
2570: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2571: $hostname{$id}=$name;
2572: $hostdom{$id}=$domain;
2573: $hostip{$id}=$ip;
2574: if ($role eq 'library') { $libserv{$id}=$name; }
2575: }
2576: }
2577:
2578: # ------------------------------------------------------ Read spare server file
2579: {
2580: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2581:
2582: while (my $configline=<$config>) {
2583: chomp($configline);
2584: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2585: $spareid{$configline}=1;
2586: }
2587: }
2588: }
2589: # ------------------------------------------------------------ Read permissions
2590: {
2591: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2592:
2593: while (my $configline=<$config>) {
2594: chomp($configline);
2595: if ($configline) {
2596: my ($role,$perm)=split(/ /,$configline);
2597: if ($perm ne '') { $pr{$role}=$perm; }
2598: }
2599: }
2600: }
2601:
2602: # -------------------------------------------- Read plain texts for permissions
2603: {
2604: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2605:
2606: while (my $configline=<$config>) {
2607: chomp($configline);
2608: if ($configline) {
2609: my ($short,$plain)=split(/:/,$configline);
2610: if ($plain ne '') { $prp{$short}=$plain; }
2611: }
2612: }
2613: }
2614:
2615: # ---------------------------------------------------------- Read package table
2616: {
2617: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2618:
2619: while (my $configline=<$config>) {
2620: chomp($configline);
2621: my ($short,$plain)=split(/:/,$configline);
2622: my ($pack,$name)=split(/\&/,$short);
2623: if ($plain ne '') {
2624: $packagetab{$pack.'&'.$name.'&name'}=$name;
2625: $packagetab{$short}=$plain;
2626: }
2627: }
2628: }
2629:
2630: # ------------------------------------------------------------- Read file types
2631: {
2632: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2633:
2634: while (my $configline=<$config>) {
2635: next if ($configline =~ /^\#/);
2636: chomp($configline);
2637: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2638: if ($descr[0] ne '') {
2639: $fe{$ending}=lc($emb);
2640: $fd{$ending}=join(' ',@descr);
2641: }
2642: }
2643: }
2644:
2645: %metacache=();
2646:
2647: $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
2648: $dumpcount=0;
2649:
2650: &logtouch();
2651: &logthis('<font color=yellow>INFO: Read configuration</font>');
2652: }
2653:
2654: 1;
2655: __END__
2656:
2657: =head1 NAME
2658:
2659: Apache::lonnet - TCP networking package
2660:
2661: =head1 SYNOPSIS
2662:
2663: Invoked by other LON-CAPA modules.
2664:
2665: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
2666:
2667: =head1 INTRODUCTION
2668:
2669: This module provides subroutines which interact with the
2670: lonc/lond (TCP) network layer of LON-CAPA.
2671:
2672: This is part of the LearningOnline Network with CAPA project
2673: described at http://www.lon-capa.org.
2674:
2675: =head1 HANDLER SUBROUTINE
2676:
2677: There is no handler routine for this module.
2678:
2679: =head1 OTHER SUBROUTINES
2680:
2681: =over 4
2682:
2683: =item *
2684:
2685: logtouch() : make sure the logfile, lonnet.log, exists
2686:
2687: =item *
2688:
2689: logthis() : append message to lonnet.log
2690:
2691: =item *
2692:
2693: logperm() : append a permanent message to lonnet.perm.log
2694:
2695: =item *
2696:
2697: subreply() : non-critical communication, called by &reply
2698:
2699: =item *
2700:
2701: reply() : makes two attempts to pass message; logs refusals and rejections
2702:
2703: =item *
2704:
2705: reconlonc() : tries to reconnect lonc client processes.
2706:
2707: =item *
2708:
2709: critical() : passes a critical message to another server; if cannot get
2710: through then place message in connection buffer
2711:
2712: =item *
2713:
2714: appenv(%hash) : read in current user environment, append new environment
2715: values to make new user environment
2716:
2717: =item *
2718:
2719: delenv($varname) : read in current user environment, remove all values
2720: beginning with $varname, write new user environment (note: flock is used
2721: to prevent conflicting shared read/writes with file)
2722:
2723: =item *
2724:
2725: spareserver() : find server with least workload from spare.tab
2726:
2727: =item *
2728:
2729: queryauthenticate($uname,$udom) : try to determine user's current
2730: authentication scheme
2731:
2732: =item *
2733:
2734: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
2735: servers (first use the current one)
2736:
2737: =item *
2738:
2739: homeserver($uname,$udom) : find the homebase for a user from domain's lib
2740: servers
2741:
2742: =item *
2743:
2744: idget($udom,@ids) : find the usernames behind a list of IDs (returns hash:
2745: id=>name,id=>name)
2746:
2747: =item *
2748:
2749: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
2750: name=>id,name=>id)
2751:
2752: =item *
2753:
2754: idput($udom,%ids) : store away a list of names and associated IDs
2755:
2756: =item *
2757:
2758: usection($domain,$user,$courseid) : output of section name/number or '' for
2759: "not in course" and '-1' for "no section"
2760:
2761: =item *
2762:
2763: userenvironment($domain,$user,$what) : puts out any environment parameter
2764: for a user
2765:
2766: =item *
2767:
2768: subscribe($fname) : subscribe to a resource, return URL if possible
2769:
2770: =item *
2771:
2772: repcopy($filename) : replicate file
2773:
2774: =item *
2775:
2776: ssi($url,%hash) : server side include, does a complete request cycle on url to
2777: localhost, posts hash
2778:
2779: =item *
2780:
2781: log($domain,$name,$home,$message) : write to permanent log for user; use
2782: critical subroutine
2783:
2784: =item *
2785:
2786: flushcourselogs() : flush (save) buffer logs and access logs
2787:
2788: =item *
2789:
2790: courselog($what) : save message for course in hash
2791:
2792: =item *
2793:
2794: courseacclog($what) : save message for course using &courselog(). Perform
2795: special processing for specific resource types (problems, exams, quizzes, etc).
2796:
2797: =item *
2798:
2799: countacc($url) : count the number of accesses to a given URL
2800:
2801: =item *
2802:
2803: sub checkout($symb,$tuname,$tudom,$tcrsid) : check out an item
2804:
2805: =item *
2806:
2807: sub checkin($token) : check in an item
2808:
2809: =item *
2810:
2811: sub expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
2812:
2813: =item *
2814:
2815: devalidate($symb) : devalidate spreadsheets
2816:
2817: =item *
2818:
2819: hash2str(%hash) : convert a hash into a string complete with escaping and '='
2820: and '&' separators
2821:
2822: =item *
2823:
2824: str2hash($string) : convert string to hash using unescaping and splitting on
2825: '=' and '&'
2826:
2827: =item *
2828:
2829: tmpreset($symb,$namespace,$domain,$stuname) : temporary storage
2830:
2831: =item *
2832:
2833: tmprestore($symb,$namespace,$domain,$stuname) : temporary restore
2834:
2835: =item *
2836:
2837: store($storehash,$symb,$namespace,$domain,$stuname) : stores hash permanently
2838: for this url; hashref needs to be given and should be a \%hashname; the
2839: remaining args aren't required and if they aren't passed or are '' they will
2840: be derived from the ENV
2841:
2842: =item *
2843:
2844: cstore($storehash,$symb,$namespace,$domain,$stuname) : same as store but
2845: uses critical subroutine
2846:
2847: =item *
2848:
2849: restore($symb,$namespace,$domain,$stuname) : returns hash for this symb;
2850: all args are optional
2851:
2852: =item *
2853:
2854: coursedescription($courseid) : course description
2855:
2856: =item *
2857:
2858: rolesinit($domain,$username,$authhost) : get user privileges
2859:
2860: =item *
2861:
2862: get($namespace,$storearr,$udomain,$uname) : returns hash with keys from array
2863: reference filled in from namesp ($udomain and $uname are optional)
2864:
2865: =item *
2866:
2867: del($namespace,$storearr,$udomain,$uname) : deletes keys out of array from
2868: namesp ($udomain and $uname are optional)
2869:
2870: =item *
2871:
2872: dump($namespace,$udomain,$uname) : dumps the complete namespace into a hash
2873: ($udomain and $uname are optional)
2874:
2875: =item *
2876:
2877: put($namespace,$storehash,$udomain,$uname) : stores hash in namesp
2878: ($udomain and $uname are optional)
2879:
2880: =item *
2881:
2882: cput($namespace,$storehash,$udomain,$uname) : critical put
2883: ($udomain and $uname are optional)
2884:
2885: =item *
2886:
2887: eget($namespace,$storearr,$udomain,$uname) : returns hash with keys from array
2888: reference filled in from namesp (encrypts the return communication)
2889: ($udomain and $uname are optional)
2890:
2891: =item *
2892:
2893: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
2894: actions
2895: F: full access
2896: U,I,K: authentication modes (cxx only)
2897: '': forbidden
2898: 1: user needs to choose course
2899: 2: browse allowed
2900:
2901: =item *
2902:
2903: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
2904: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
2905: and course level
2906:
2907: =item *
2908:
2909: metadata_query($query,$custom,$customshow) : make a metadata query against the
2910: network of library servers; returns file handle of where SQL and regex results
2911: will be stored for query
2912:
2913: =item *
2914:
2915: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
2916: explanation of a user role term
2917:
2918: =item *
2919:
2920: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
2921: user for the level given by URL. Optional start and end dates (leave empty
2922: string or zero for "no date")
2923:
2924: =item *
2925:
2926: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
2927:
2928: =item *
2929:
2930: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
2931: modify user
2932:
2933: =item *
2934:
2935: modifystudent($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2936: $end,$start) : modify student
2937:
2938: =item *
2939:
2940: writecoursepref($courseid,%prefs) : write preferences for a course
2941:
2942: =item *
2943:
2944: createcourse($udom,$description,$url) : make/modify course
2945:
2946: =item *
2947:
2948: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
2949: custom role; give a custom role to a user for the level given by URL. Specify
2950: name and domain of role author, and role name
2951:
2952: =item *
2953:
2954: revokerole($udom,$uname,$url,$role) : revoke a role for url
2955:
2956: =item *
2957:
2958: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
2959:
2960: =item *
2961:
2962: dirlist($uri) : return directory list based on URI
2963:
2964: =item *
2965:
2966: directcondval($number) : get current value of a condition; reads from a state
2967: string
2968:
2969: =item *
2970:
2971: condval($condidx) : value of condition index based on state
2972:
2973: =item *
2974:
2975: EXT($varname,$symbparm) : value of a variable
2976:
2977: =item *
2978:
2979: metadata($uri,$what,$liburi,$prefix,$depthcount) : get metadata; returns the
2980: metadata entry for a file; entry='keys', returns a comma separated list of keys
2981:
2982: =item *
2983:
2984: symblist($mapname,%newhash) : update symbolic storage links
2985:
2986: =item *
2987:
2988: symbread($filename) : return symbolic list entry (filename argument optional);
2989: returns the data handle
2990:
2991: =item *
2992:
2993: numval($salt) : return random seed value (addend for rndseed)
2994:
2995: =item *
2996:
2997: rndseed($symb,$courseid,$domain,$username) : create a random sum; returns
2998: a random seed, all arguments are optional, if they aren't sent it uses the
2999: environment to derive them. Note: if symb isn't sent and it can't get one
3000: from &symbread it will use the current time as its return value
3001:
3002: =item *
3003:
3004: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
3005: unfakeable, receipt
3006:
3007: =item *
3008:
3009: receipt() : API to ireceipt working off of ENV values; given out to users
3010:
3011: =item *
3012:
3013: getfile($file) : serves up a file, returns the contents of a file or -1;
3014: replicates and subscribes to the file
3015:
3016: =item *
3017:
3018: filelocation($dir,$file) : returns file system location of a file based on URI;
3019: meant to be "fairly clean" absolute reference
3020:
3021: =item *
3022:
3023: hreflocation($dir,$file) : returns file system location or a URL; same as
3024: filelocation except for hrefs
3025:
3026: =item *
3027:
3028: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
3029:
3030: =item *
3031:
3032: escape() : unpack non-word characters into CGI-compatible hex codes
3033:
3034: =item *
3035:
3036: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
3037:
3038: =item *
3039:
3040: goodbye() : flush course logs and log shutting down; it is called in srm.conf
3041: as a PerlChildExitHandler
3042:
3043: =back
3044:
3045: =cut
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