1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.194 2001/12/27 17:00:30 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 02/27/01 Scott Harrison
51: # 3/2 Gerd Kortemeyer
52: # 3/15,3/19 Scott Harrison
53: # 3/19,3/20 Gerd Kortemeyer
54: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
55: # 5/26,5/28 Gerd Kortemeyer
56: # 5/30 H. K. Ng
57: # 6/1 Gerd Kortemeyer
58: # July Guy Albertelli
59: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
60: # 10/2 Gerd Kortemeyer
61: # 10/5,10/10,11/13,11/15 Scott Harrison
62: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
63: # 12/5 Matthew Hall
64: # 12/5 Guy Albertelli
65: # 12/6,12/7,12/12 Gerd Kortemeyer
66: # 12/18 Scott Harrison
67: # 12/21,12/22,12/27 Gerd Kortemeyer
68: #
69: ###
70:
71: package Apache::lonnet;
72:
73: use strict;
74: use Apache::File;
75: use LWP::UserAgent();
76: use HTTP::Headers;
77: use vars
78: qw(%perlvar %hostname %homecache %hostip %spareid %hostdom
79: %libserv %pr %prp %metacache %packagetab
80: %courselogs %accesshash $processmarker $dumpcount
81: %coursedombuf %coursehombuf);
82: use IO::Socket;
83: use GDBM_File;
84: use Apache::Constants qw(:common :http);
85: use HTML::TokeParser;
86: use Fcntl qw(:flock);
87:
88: # --------------------------------------------------------------------- Logging
89:
90: sub logtouch {
91: my $execdir=$perlvar{'lonDaemons'};
92: unless (-e "$execdir/logs/lonnet.log") {
93: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
94: close $fh;
95: }
96: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
97: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
98: }
99:
100: sub logthis {
101: my $message=shift;
102: my $execdir=$perlvar{'lonDaemons'};
103: my $now=time;
104: my $local=localtime($now);
105: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
106: print $fh "$local ($$): $message\n";
107: return 1;
108: }
109:
110: sub logperm {
111: my $message=shift;
112: my $execdir=$perlvar{'lonDaemons'};
113: my $now=time;
114: my $local=localtime($now);
115: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
116: print $fh "$now:$message:$local\n";
117: return 1;
118: }
119:
120: # -------------------------------------------------- Non-critical communication
121: sub subreply {
122: my ($cmd,$server)=@_;
123: my $peerfile="$perlvar{'lonSockDir'}/$server";
124: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
125: Type => SOCK_STREAM,
126: Timeout => 10)
127: or return "con_lost";
128: print $client "$cmd\n";
129: my $answer=<$client>;
130: if (!$answer) { $answer="con_lost"; }
131: chomp($answer);
132: return $answer;
133: }
134:
135: sub reply {
136: my ($cmd,$server)=@_;
137: my $answer=subreply($cmd,$server);
138: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
139: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
140: &logthis("<font color=blue>WARNING:".
141: " $cmd to $server returned $answer</font>");
142: }
143: return $answer;
144: }
145:
146: # ----------------------------------------------------------- Send USR1 to lonc
147:
148: sub reconlonc {
149: my $peerfile=shift;
150: &logthis("Trying to reconnect for $peerfile");
151: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
152: if (my $fh=Apache::File->new("$loncfile")) {
153: my $loncpid=<$fh>;
154: chomp($loncpid);
155: if (kill 0 => $loncpid) {
156: &logthis("lonc at pid $loncpid responding, sending USR1");
157: kill USR1 => $loncpid;
158: sleep 1;
159: if (-e "$peerfile") { return; }
160: &logthis("$peerfile still not there, give it another try");
161: sleep 5;
162: if (-e "$peerfile") { return; }
163: &logthis(
164: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
165: } else {
166: &logthis(
167: "<font color=blue>WARNING:".
168: " lonc at pid $loncpid not responding, giving up</font>");
169: }
170: } else {
171: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
172: }
173: }
174:
175: # ------------------------------------------------------ Critical communication
176:
177: sub critical {
178: my ($cmd,$server)=@_;
179: unless ($hostname{$server}) {
180: &logthis("<font color=blue>WARNING:".
181: " Critical message to unknown server ($server)</font>");
182: return 'no_such_host';
183: }
184: my $answer=reply($cmd,$server);
185: if ($answer eq 'con_lost') {
186: my $pingreply=reply('ping',$server);
187: &reconlonc("$perlvar{'lonSockDir'}/$server");
188: my $pongreply=reply('pong',$server);
189: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
190: $answer=reply($cmd,$server);
191: if ($answer eq 'con_lost') {
192: my $now=time;
193: my $middlename=$cmd;
194: $middlename=substr($middlename,0,16);
195: $middlename=~s/\W//g;
196: my $dfilename=
197: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
198: {
199: my $dfh;
200: if ($dfh=Apache::File->new(">$dfilename")) {
201: print $dfh "$cmd\n";
202: }
203: }
204: sleep 2;
205: my $wcmd='';
206: {
207: my $dfh;
208: if ($dfh=Apache::File->new("$dfilename")) {
209: $wcmd=<$dfh>;
210: }
211: }
212: chomp($wcmd);
213: if ($wcmd eq $cmd) {
214: &logthis("<font color=blue>WARNING: ".
215: "Connection buffer $dfilename: $cmd</font>");
216: &logperm("D:$server:$cmd");
217: return 'con_delayed';
218: } else {
219: &logthis("<font color=red>CRITICAL:"
220: ." Critical connection failed: $server $cmd</font>");
221: &logperm("F:$server:$cmd");
222: return 'con_failed';
223: }
224: }
225: }
226: return $answer;
227: }
228:
229: # ---------------------------------------------------------- Append Environment
230:
231: sub appenv {
232: my %newenv=@_;
233: foreach (keys %newenv) {
234: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
235: &logthis("<font color=blue>WARNING: ".
236: "Attempt to modify environment ".$_." to ".$newenv{$_}
237: .'</font>');
238: delete($newenv{$_});
239: } else {
240: $ENV{$_}=$newenv{$_};
241: }
242: }
243:
244: my $lockfh;
245: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
246: return 'error: '.$!;
247: }
248: unless (flock($lockfh,LOCK_EX)) {
249: &logthis("<font color=blue>WARNING: ".
250: 'Could not obtain exclusive lock in appenv: '.$!);
251: $lockfh->close();
252: return 'error: '.$!;
253: }
254:
255: my @oldenv;
256: {
257: my $fh;
258: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
259: return 'error: '.$!;
260: }
261: @oldenv=<$fh>;
262: $fh->close();
263: }
264: for (my $i=0; $i<=$#oldenv; $i++) {
265: chomp($oldenv[$i]);
266: if ($oldenv[$i] ne '') {
267: my ($name,$value)=split(/=/,$oldenv[$i]);
268: unless (defined($newenv{$name})) {
269: $newenv{$name}=$value;
270: }
271: }
272: }
273: {
274: my $fh;
275: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
276: return 'error';
277: }
278: my $newname;
279: foreach $newname (keys %newenv) {
280: print $fh "$newname=$newenv{$newname}\n";
281: }
282: $fh->close();
283: }
284:
285: $lockfh->close();
286: return 'ok';
287: }
288: # ----------------------------------------------------- Delete from Environment
289:
290: sub delenv {
291: my $delthis=shift;
292: my %newenv=();
293: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
294: &logthis("<font color=blue>WARNING: ".
295: "Attempt to delete from environment ".$delthis);
296: return 'error';
297: }
298: my @oldenv;
299: {
300: my $fh;
301: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
302: return 'error';
303: }
304: unless (flock($fh,LOCK_SH)) {
305: &logthis("<font color=blue>WARNING: ".
306: 'Could not obtain shared lock in delenv: '.$!);
307: $fh->close();
308: return 'error: '.$!;
309: }
310: @oldenv=<$fh>;
311: $fh->close();
312: }
313: {
314: my $fh;
315: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
316: return 'error';
317: }
318: unless (flock($fh,LOCK_EX)) {
319: &logthis("<font color=blue>WARNING: ".
320: 'Could not obtain exclusive lock in delenv: '.$!);
321: $fh->close();
322: return 'error: '.$!;
323: }
324: foreach (@oldenv) {
325: unless ($_=~/^$delthis/) { print $fh $_; }
326: }
327: $fh->close();
328: }
329: return 'ok';
330: }
331:
332: # ------------------------------ Find server with least workload from spare.tab
333:
334: sub spareserver {
335: my $tryserver;
336: my $spareserver='';
337: my $lowestserver=100;
338: foreach $tryserver (keys %spareid) {
339: my $answer=reply('load',$tryserver);
340: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
341: $spareserver="http://$hostname{$tryserver}";
342: $lowestserver=$answer;
343: }
344: }
345: return $spareserver;
346: }
347:
348: # ----------------------- Try to determine user's current authentication scheme
349:
350: sub queryauthenticate {
351: my ($uname,$udom)=@_;
352: if (($perlvar{'lonRole'} eq 'library') &&
353: ($udom eq $perlvar{'lonDefDomain'})) {
354: my $answer=reply("encrypt:currentauth:$udom:$uname",
355: $perlvar{'lonHostID'});
356: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
357: if (length($answer)) {
358: return $answer;
359: }
360: else {
361: &logthis("User $uname at $udom lacks an authentication mechanism");
362: return 'no_host';
363: }
364: }
365: }
366:
367: my $tryserver;
368: foreach $tryserver (keys %libserv) {
369: if ($hostdom{$tryserver} eq $udom) {
370: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
371: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
372: if (length($answer)) {
373: return $answer;
374: }
375: else {
376: &logthis("User $uname at $udom lacks an authentication mechanism");
377: return 'no_host';
378: }
379: }
380: }
381: }
382: &logthis("User $uname at $udom lacks an authentication mechanism");
383: return 'no_host';
384: }
385:
386: # --------- Try to authenticate user from domain's lib servers (first this one)
387:
388: sub authenticate {
389: my ($uname,$upass,$udom)=@_;
390: $upass=escape($upass);
391: if (($perlvar{'lonRole'} eq 'library') &&
392: ($udom eq $perlvar{'lonDefDomain'})) {
393: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
394: if ($answer =~ /authorized/) {
395: if ($answer eq 'authorized') {
396: &logthis("User $uname at $udom authorized by local server");
397: return $perlvar{'lonHostID'};
398: }
399: if ($answer eq 'non_authorized') {
400: &logthis("User $uname at $udom rejected by local server");
401: return 'no_host';
402: }
403: }
404: }
405:
406: my $tryserver;
407: foreach $tryserver (keys %libserv) {
408: if ($hostdom{$tryserver} eq $udom) {
409: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
410: if ($answer =~ /authorized/) {
411: if ($answer eq 'authorized') {
412: &logthis("User $uname at $udom authorized by $tryserver");
413: return $tryserver;
414: }
415: if ($answer eq 'non_authorized') {
416: &logthis("User $uname at $udom rejected by $tryserver");
417: return 'no_host';
418: }
419: }
420: }
421: }
422: &logthis("User $uname at $udom could not be authenticated");
423: return 'no_host';
424: }
425:
426: # ---------------------- Find the homebase for a user from domain's lib servers
427:
428: sub homeserver {
429: my ($uname,$udom)=@_;
430:
431: my $index="$uname:$udom";
432: if ($homecache{$index}) { return "$homecache{$index}"; }
433:
434: my $tryserver;
435: foreach $tryserver (keys %libserv) {
436: if ($hostdom{$tryserver} eq $udom) {
437: my $answer=reply("home:$udom:$uname",$tryserver);
438: if ($answer eq 'found') {
439: $homecache{$index}=$tryserver;
440: return $tryserver;
441: }
442: }
443: }
444: return 'no_host';
445: }
446:
447: # ------------------------------------- Find the usernames behind a list of IDs
448:
449: sub idget {
450: my ($udom,@ids)=@_;
451: my %returnhash=();
452:
453: my $tryserver;
454: foreach $tryserver (keys %libserv) {
455: if ($hostdom{$tryserver} eq $udom) {
456: my $idlist=join('&',@ids);
457: $idlist=~tr/A-Z/a-z/;
458: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
459: my @answer=();
460: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
461: @answer=split(/\&/,$reply);
462: } ;
463: my $i;
464: for ($i=0;$i<=$#ids;$i++) {
465: if ($answer[$i]) {
466: $returnhash{$ids[$i]}=$answer[$i];
467: }
468: }
469: }
470: }
471: return %returnhash;
472: }
473:
474: # ------------------------------------- Find the IDs behind a list of usernames
475:
476: sub idrget {
477: my ($udom,@unames)=@_;
478: my %returnhash=();
479: foreach (@unames) {
480: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
481: }
482: return %returnhash;
483: }
484:
485: # ------------------------------- Store away a list of names and associated IDs
486:
487: sub idput {
488: my ($udom,%ids)=@_;
489: my %servers=();
490: foreach (keys %ids) {
491: my $uhom=&homeserver($_,$udom);
492: if ($uhom ne 'no_host') {
493: my $id=&escape($ids{$_});
494: $id=~tr/A-Z/a-z/;
495: my $unam=&escape($_);
496: if ($servers{$uhom}) {
497: $servers{$uhom}.='&'.$id.'='.$unam;
498: } else {
499: $servers{$uhom}=$id.'='.$unam;
500: }
501: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
502: }
503: }
504: foreach (keys %servers) {
505: &critical('idput:'.$udom.':'.$servers{$_},$_);
506: }
507: }
508:
509: # ------------------------------------- Find the section of student in a course
510:
511: sub usection {
512: my ($udom,$unam,$courseid)=@_;
513: $courseid=~s/\_/\//g;
514: $courseid=~s/^(\w)/\/$1/;
515: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
516: &homeserver($unam,$udom)))) {
517: my ($key,$value)=split(/\=/,$_);
518: $key=&unescape($key);
519: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
520: my $section=$1;
521: if ($key eq $courseid.'_st') { $section=''; }
522: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
523: my $now=time;
524: my $notactive=0;
525: if ($start) {
526: if ($now<$start) { $notactive=1; }
527: }
528: if ($end) {
529: if ($now>$end) { $notactive=1; }
530: }
531: unless ($notactive) { return $section; }
532: }
533: }
534: return '-1';
535: }
536:
537: # ------------------------------------- Read an entry from a user's environment
538:
539: sub userenvironment {
540: my ($udom,$unam,@what)=@_;
541: my %returnhash=();
542: my @answer=split(/\&/,
543: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
544: &homeserver($unam,$udom)));
545: my $i;
546: for ($i=0;$i<=$#what;$i++) {
547: $returnhash{$what[$i]}=&unescape($answer[$i]);
548: }
549: return %returnhash;
550: }
551:
552: # ----------------------------- Subscribe to a resource, return URL if possible
553:
554: sub subscribe {
555: my $fname=shift;
556: my $author=$fname;
557: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
558: my ($udom,$uname)=split(/\//,$author);
559: my $home=homeserver($uname,$udom);
560: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
561: return 'not_found';
562: }
563: my $answer=reply("sub:$fname",$home);
564: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
565: $answer.=' by '.$home;
566: }
567: return $answer;
568: }
569:
570: # -------------------------------------------------------------- Replicate file
571:
572: sub repcopy {
573: my $filename=shift;
574: $filename=~s/\/+/\//g;
575: my $transname="$filename.in.transfer";
576: if ((-e $filename) || (-e $transname)) { return OK; }
577: my $remoteurl=subscribe($filename);
578: if ($remoteurl =~ /^con_lost by/) {
579: &logthis("Subscribe returned $remoteurl: $filename");
580: return HTTP_SERVICE_UNAVAILABLE;
581: } elsif ($remoteurl eq 'not_found') {
582: &logthis("Subscribe returned not_found: $filename");
583: return HTTP_NOT_FOUND;
584: } elsif ($remoteurl =~ /^rejected by/) {
585: &logthis("Subscribe returned $remoteurl: $filename");
586: return FORBIDDEN;
587: } elsif ($remoteurl eq 'directory') {
588: return OK;
589: } else {
590: my @parts=split(/\//,$filename);
591: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
592: if ($path ne "$perlvar{'lonDocRoot'}/res") {
593: &logthis("Malconfiguration for replication: $filename");
594: return HTTP_BAD_REQUEST;
595: }
596: my $count;
597: for ($count=5;$count<$#parts;$count++) {
598: $path.="/$parts[$count]";
599: if ((-e $path)!=1) {
600: mkdir($path,0777);
601: }
602: }
603: my $ua=new LWP::UserAgent;
604: my $request=new HTTP::Request('GET',"$remoteurl");
605: my $response=$ua->request($request,$transname);
606: if ($response->is_error()) {
607: unlink($transname);
608: my $message=$response->status_line;
609: &logthis("<font color=blue>WARNING:"
610: ." LWP get: $message: $filename</font>");
611: return HTTP_SERVICE_UNAVAILABLE;
612: } else {
613: if ($remoteurl!~/\.meta$/) {
614: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
615: my $mresponse=$ua->request($mrequest,$filename.'.meta');
616: if ($mresponse->is_error()) {
617: unlink($filename.'.meta');
618: &logthis(
619: "<font color=yellow>INFO: No metadata: $filename</font>");
620: }
621: }
622: rename($transname,$filename);
623: return OK;
624: }
625: }
626: }
627:
628: # --------------------------------------------------------- Server Side Include
629:
630: sub ssi {
631:
632: my ($fn,%form)=@_;
633:
634: my $ua=new LWP::UserAgent;
635:
636: my $request;
637:
638: if (%form) {
639: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
640: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
641: } else {
642: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
643: }
644:
645: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
646: my $response=$ua->request($request);
647:
648: return $response->content;
649: }
650:
651: # ------------------------------------------------------------------------- Log
652:
653: sub log {
654: my ($dom,$nam,$hom,$what)=@_;
655: return critical("log:$dom:$nam:$what",$hom);
656: }
657:
658: # ------------------------------------------------------------------ Course Log
659:
660: sub flushcourselogs {
661: &logthis('Flushing course log buffers');
662: foreach (keys %courselogs) {
663: my $crsid=$_;
664: if (&reply('log:'.$coursedombuf{$crsid}.':'.
665: &escape($courselogs{$crsid}),
666: $coursehombuf{$crsid}) eq 'ok') {
667: delete $courselogs{$crsid};
668: } else {
669: &logthis('Failed to flush log buffer for '.$crsid);
670: if (length($courselogs{$crsid})>40000) {
671: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
672: " exceeded maximum size, deleting.</font>");
673: delete $courselogs{$crsid};
674: }
675: }
676: }
677: &logthis('Flushing access logs');
678: foreach (keys %accesshash) {
679: my $entry=$_;
680: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
681: my %temphash=($entry => $accesshash{$entry});
682: if (&Apache::lonnet::put('resevaldata',\%temphash,$1,$2) eq 'ok') {
683: delete $accesshash{$entry};
684: }
685: }
686: $dumpcount++;
687: }
688:
689: sub courselog {
690: my $what=shift;
691: $what=time.':'.$what;
692: unless ($ENV{'request.course.id'}) { return ''; }
693: $coursedombuf{$ENV{'request.course.id'}}=
694: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
695: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
696: $coursehombuf{$ENV{'request.course.id'}}=
697: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
698: if (defined $courselogs{$ENV{'request.course.id'}}) {
699: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
700: } else {
701: $courselogs{$ENV{'request.course.id'}}.=$what;
702: }
703: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
704: &flushcourselogs();
705: }
706: }
707:
708: sub courseacclog {
709: my $fnsymb=shift;
710: unless ($ENV{'request.course.id'}) { return ''; }
711: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
712: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
713: $what.=':POST';
714: foreach (keys %ENV) {
715: if ($_=~/^form\.(.*)/) {
716: $what.=':'.$1.'='.$ENV{$_};
717: }
718: }
719: }
720: &courselog($what);
721: }
722:
723: sub countacc {
724: my $url=&declutter(shift);
725: unless ($ENV{'request.course.id'}) { return ''; }
726: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
727: my $key=$processmarker.'_'.$dumpcount.'___'.$url.'___count';
728: if (defined($accesshash{$key})) {
729: $accesshash{$key}++;
730: } else {
731: $accesshash{$key}=1;
732: }
733: }
734:
735: # ----------------------------------------------------------- Check out an item
736:
737: sub checkout {
738: my ($symb,$tuname,$tudom,$tcrsid)=@_;
739: my $now=time;
740: my $lonhost=$perlvar{'lonHostID'};
741: my $infostr=&escape(
742: $tuname.'&'.
743: $tudom.'&'.
744: $tcrsid.'&'.
745: $symb.'&'.
746: $now.'&'.$ENV{'REMOTE_ADDR'});
747: my $token=&reply('tmpput:'.$infostr,$lonhost);
748: if ($token=~/^error\:/) {
749: &logthis("<font color=blue>WARNING: ".
750: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
751: "</font>");
752: return '';
753: }
754:
755: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
756: $token=~tr/a-z/A-Z/;
757:
758: my %infohash=('resource.0.outtoken' => $token,
759: 'resource.0.checkouttime' => $now,
760: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
761:
762: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
763: return '';
764: } else {
765: &logthis("<font color=blue>WARNING: ".
766: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
767: "</font>");
768: }
769:
770: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
771: &escape('Checkout '.$infostr.' - '.
772: $token)) ne 'ok') {
773: return '';
774: } else {
775: &logthis("<font color=blue>WARNING: ".
776: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
777: "</font>");
778: }
779: return $token;
780: }
781:
782: # ------------------------------------------------------------ Check in an item
783:
784: sub checkin {
785: my $token=shift;
786: my $now=time;
787: my ($ta,$tb,$lonhost)=split(/\*/,$token);
788: $lonhost=~tr/A-Z/a-z/;
789: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
790: $dtoken=~s/\W/\_/g;
791: my ($tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
792: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
793:
794: unless (($tuname) && ($tudom)) {
795: &logthis('Check in '.$token.' ('.$dtoken.') failed');
796: return '';
797: }
798:
799: unless (&allowed('mgr',$tcrsid)) {
800: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
801: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
802: return '';
803: }
804:
805: my %infohash=('resource.0.intoken' => $token,
806: 'resource.0.checkintime' => $now,
807: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
808:
809: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
810: return '';
811: }
812:
813: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
814: &escape('Checkin - '.$token)) ne 'ok') {
815: return '';
816: }
817:
818: return ($symb,$tuname,$tudom,$tcrsid);
819: }
820:
821: # --------------------------------------------- Set Expire Date for Spreadsheet
822:
823: sub expirespread {
824: my ($uname,$udom,$stype,$usymb)=@_;
825: my $cid=$ENV{'request.course.id'};
826: if ($cid) {
827: my $now=time;
828: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
829: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
830: $ENV{'course.'.$cid.'.num'}.
831: ':nohist_expirationdates:'.
832: &escape($key).'='.$now,
833: $ENV{'course.'.$cid.'.home'})
834: }
835: return 'ok';
836: }
837:
838: # ----------------------------------------------------- Devalidate Spreadsheets
839:
840: sub devalidate {
841: my $symb=shift;
842: my $cid=$ENV{'request.course.id'};
843: if ($cid) {
844: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
845: my $status=
846: &del('nohist_calculatedsheet',
847: [$key.'studentcalc'],
848: $ENV{'course.'.$cid.'.domain'},
849: $ENV{'course.'.$cid.'.num'})
850: .' '.
851: &del('nohist_calculatedsheets_'.$cid,
852: [$key.'assesscalc:'.$symb]);
853: unless ($status eq 'ok ok') {
854: &logthis('Could not devalidate spreadsheet '.
855: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
856: $symb.': '.$status);
857: }
858: }
859: }
860:
861: sub hash2str {
862: my (%hash)=@_;
863: my $result='';
864: foreach (keys %hash) { $result.=escape($_).'='.escape($hash{$_}).'&'; }
865: $result=~s/\&$//;
866: return $result;
867: }
868:
869: sub str2hash {
870: my ($string) = @_;
871: my %returnhash;
872: foreach (split(/\&/,$string)) {
873: my ($name,$value)=split(/\=/,$_);
874: $returnhash{&unescape($name)}=&unescape($value);
875: }
876: return %returnhash;
877: }
878:
879: # -------------------------------------------------------------------Temp Store
880:
881: sub tmpreset {
882: my ($symb,$namespace,$domain,$stuname) = @_;
883: if (!$symb) {
884: $symb=&symbread();
885: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
886: }
887: $symb=escape($symb);
888:
889: if (!$namespace) { $namespace=$ENV{'request.state'}; }
890: $namespace=~s/\//\_/g;
891: $namespace=~s/\W//g;
892:
893: #FIXME needs to do something for /pub resources
894: if (!$domain) { $domain=$ENV{'user.domain'}; }
895: if (!$stuname) { $stuname=$ENV{'user.name'}; }
896: my $path=$perlvar{'lonDaemons'}.'/tmp';
897: my %hash;
898: if (tie(%hash,'GDBM_File',
899: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
900: &GDBM_WRCREAT,0640)) {
901: foreach my $key (keys %hash) {
902: if ($key=~ /:$symb/) {
903: delete($hash{$key});
904: }
905: }
906: }
907: }
908:
909: sub tmpstore {
910: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
911:
912: if (!$symb) {
913: $symb=&symbread();
914: if (!$symb) { $symb= $ENV{'request.url'}; }
915: }
916: $symb=escape($symb);
917:
918: if (!$namespace) {
919: # I don't think we would ever want to store this for a course.
920: # it seems this will only be used if we don't have a course.
921: #$namespace=$ENV{'request.course.id'};
922: #if (!$namespace) {
923: $namespace=$ENV{'request.state'};
924: #}
925: }
926: $namespace=~s/\//\_/g;
927: $namespace=~s/\W//g;
928: #FIXME needs to do something for /pub resources
929: if (!$domain) { $domain=$ENV{'user.domain'}; }
930: if (!$stuname) { $stuname=$ENV{'user.name'}; }
931: my $now=time;
932: my %hash;
933: my $path=$perlvar{'lonDaemons'}.'/tmp';
934: if (tie(%hash,'GDBM_File',
935: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
936: &GDBM_WRCREAT,0640)) {
937: $hash{"version:$symb"}++;
938: my $version=$hash{"version:$symb"};
939: my $allkeys='';
940: foreach my $key (keys(%$storehash)) {
941: $allkeys.=$key.':';
942: $hash{"$version:$symb:$key"}=$$storehash{$key};
943: }
944: $hash{"$version:$symb:timestamp"}=$now;
945: $allkeys.='timestamp';
946: $hash{"$version:keys:$symb"}=$allkeys;
947: if (untie(%hash)) {
948: return 'ok';
949: } else {
950: return "error:$!";
951: }
952: } else {
953: return "error:$!";
954: }
955: }
956:
957: # -----------------------------------------------------------------Temp Restore
958:
959: sub tmprestore {
960: my ($symb,$namespace,$domain,$stuname) = @_;
961:
962: if (!$symb) {
963: $symb=&symbread();
964: if (!$symb) { $symb= $ENV{'request.url'}; }
965: }
966: $symb=escape($symb);
967:
968: if (!$namespace) { $namespace=$ENV{'request.state'}; }
969: #FIXME needs to do something for /pub resources
970: if (!$domain) { $domain=$ENV{'user.domain'}; }
971: if (!$stuname) { $stuname=$ENV{'user.name'}; }
972:
973: my %returnhash;
974: $namespace=~s/\//\_/g;
975: $namespace=~s/\W//g;
976: my %hash;
977: my $path=$perlvar{'lonDaemons'}.'/tmp';
978: if (tie(%hash,'GDBM_File',
979: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
980: &GDBM_READER,0640)) {
981: my $version=$hash{"version:$symb"};
982: $returnhash{'version'}=$version;
983: my $scope;
984: for ($scope=1;$scope<=$version;$scope++) {
985: my $vkeys=$hash{"$scope:keys:$symb"};
986: my @keys=split(/:/,$vkeys);
987: my $key;
988: $returnhash{"$scope:keys"}=$vkeys;
989: foreach $key (@keys) {
990: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
991: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
992: }
993: }
994: if (!(untie(%hash))) {
995: return "error:$!";
996: }
997: } else {
998: return "error:$!";
999: }
1000: return %returnhash;
1001: }
1002:
1003: # ----------------------------------------------------------------------- Store
1004:
1005: sub store {
1006: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1007: my $home='';
1008:
1009: if ($stuname) { $home=&homeserver($stuname,$domain); }
1010:
1011: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1012:
1013: &devalidate($symb);
1014:
1015: $symb=escape($symb);
1016: if (!$namespace) {
1017: unless ($namespace=$ENV{'request.course.id'}) {
1018: return '';
1019: }
1020: }
1021: if (!$domain) { $domain=$ENV{'user.domain'}; }
1022: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1023: if (!$home) { $home=$ENV{'user.home'}; }
1024: my $namevalue='';
1025: foreach (keys %$storehash) {
1026: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1027: }
1028: $namevalue=~s/\&$//;
1029: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1030: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1031: }
1032:
1033: # -------------------------------------------------------------- Critical Store
1034:
1035: sub cstore {
1036: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1037: my $home='';
1038:
1039: if ($stuname) { $home=&homeserver($stuname,$domain); }
1040:
1041: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1042:
1043: &devalidate($symb);
1044:
1045: $symb=escape($symb);
1046: if (!$namespace) {
1047: unless ($namespace=$ENV{'request.course.id'}) {
1048: return '';
1049: }
1050: }
1051: if (!$domain) { $domain=$ENV{'user.domain'}; }
1052: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1053: if (!$home) { $home=$ENV{'user.home'}; }
1054:
1055: my $namevalue='';
1056: foreach (keys %$storehash) {
1057: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1058: }
1059: $namevalue=~s/\&$//;
1060: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1061: return critical
1062: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1063: }
1064:
1065: # --------------------------------------------------------------------- Restore
1066:
1067: sub restore {
1068: my ($symb,$namespace,$domain,$stuname) = @_;
1069: my $home='';
1070:
1071: if ($stuname) { $home=&homeserver($stuname,$domain); }
1072:
1073: if (!$symb) {
1074: unless ($symb=escape(&symbread())) { return ''; }
1075: } else {
1076: $symb=&escape($symb);
1077: }
1078: if (!$namespace) {
1079: unless ($namespace=$ENV{'request.course.id'}) {
1080: return '';
1081: }
1082: }
1083: if (!$domain) { $domain=$ENV{'user.domain'}; }
1084: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1085: if (!$home) { $home=$ENV{'user.home'}; }
1086: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1087:
1088: my %returnhash=();
1089: foreach (split(/\&/,$answer)) {
1090: my ($name,$value)=split(/\=/,$_);
1091: $returnhash{&unescape($name)}=&unescape($value);
1092: }
1093: my $version;
1094: for ($version=1;$version<=$returnhash{'version'};$version++) {
1095: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1096: $returnhash{$_}=$returnhash{$version.':'.$_};
1097: }
1098: }
1099: return %returnhash;
1100: }
1101:
1102: # ---------------------------------------------------------- Course Description
1103:
1104: sub coursedescription {
1105: my $courseid=shift;
1106: $courseid=~s/^\///;
1107: $courseid=~s/\_/\//g;
1108: my ($cdomain,$cnum)=split(/\//,$courseid);
1109: my $chome=&homeserver($cnum,$cdomain);
1110: if ($chome ne 'no_host') {
1111: my %returnhash=&dump('environment',$cdomain,$cnum);
1112: if (!exists($returnhash{'con_lost'})) {
1113: my $normalid=$cdomain.'_'.$cnum;
1114: my %envhash=();
1115: $returnhash{'home'}= $chome;
1116: $returnhash{'domain'} = $cdomain;
1117: $returnhash{'num'} = $cnum;
1118: while (my ($name,$value) = each %returnhash) {
1119: $envhash{'course.'.$normalid.'.'.$name}=$value;
1120: }
1121: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1122: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1123: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1124: $envhash{'course.'.$normalid.'.last_cache'}=time;
1125: $envhash{'course.'.$normalid.'.home'}=$chome;
1126: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1127: $envhash{'course.'.$normalid.'.num'}=$cnum;
1128: &appenv(%envhash);
1129: return %returnhash;
1130: }
1131: }
1132: return ();
1133: }
1134:
1135: # -------------------------------------------------------- Get user privileges
1136:
1137: sub rolesinit {
1138: my ($domain,$username,$authhost)=@_;
1139: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1140: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1141: my %allroles=();
1142: my %thesepriv=();
1143: my $now=time;
1144: my $userroles="user.login.time=$now\n";
1145: my $thesestr;
1146:
1147: if ($rolesdump ne '') {
1148: foreach (split(/&/,$rolesdump)) {
1149: if ($_!~/^rolesdef\&/) {
1150: my ($area,$role)=split(/=/,$_);
1151: $area=~s/\_\w\w$//;
1152: my ($trole,$tend,$tstart)=split(/_/,$role);
1153: $userroles.='user.role.'.$trole.'.'.$area.'='.
1154: $tstart.'.'.$tend."\n";
1155: if ($tend!=0) {
1156: if ($tend<$now) {
1157: $trole='';
1158: }
1159: }
1160: if ($tstart!=0) {
1161: if ($tstart>$now) {
1162: $trole='';
1163: }
1164: }
1165: if (($area ne '') && ($trole ne '')) {
1166: my $spec=$trole.'.'.$area;
1167: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1168: if ($trole =~ /^cr\//) {
1169: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1170: my $homsvr=homeserver($rauthor,$rdomain);
1171: if ($hostname{$homsvr} ne '') {
1172: my $roledef=
1173: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1174: $homsvr);
1175: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1176: my ($syspriv,$dompriv,$coursepriv)=
1177: split(/\_/,unescape($roledef));
1178: $allroles{'cm./'}.=':'.$syspriv;
1179: $allroles{$spec.'./'}.=':'.$syspriv;
1180: if ($tdomain ne '') {
1181: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1182: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1183: if ($trest ne '') {
1184: $allroles{'cm.'.$area}.=':'.$coursepriv;
1185: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1186: }
1187: }
1188: }
1189: }
1190: } else {
1191: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1192: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1193: if ($tdomain ne '') {
1194: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1195: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1196: if ($trest ne '') {
1197: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1198: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1199: }
1200: }
1201: }
1202: }
1203: }
1204: }
1205: my $adv=0;
1206: my $author=0;
1207: foreach (keys %allroles) {
1208: %thesepriv=();
1209: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1210: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1211: foreach (split(/:/,$allroles{$_})) {
1212: if ($_ ne '') {
1213: my ($privilege,$restrictions)=split(/&/,$_);
1214: if ($restrictions eq '') {
1215: $thesepriv{$privilege}='F';
1216: } else {
1217: if ($thesepriv{$privilege} ne 'F') {
1218: $thesepriv{$privilege}.=$restrictions;
1219: }
1220: }
1221: }
1222: }
1223: $thesestr='';
1224: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1225: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1226: }
1227: $userroles.='user.adv='.$adv."\n".
1228: 'user.author='.$author."\n";
1229: $ENV{'user.adv'}=$adv;
1230: }
1231: return $userroles;
1232: }
1233:
1234: # --------------------------------------------------------------- get interface
1235:
1236: sub get {
1237: my ($namespace,$storearr,$udomain,$uname)=@_;
1238: my $items='';
1239: foreach (@$storearr) {
1240: $items.=escape($_).'&';
1241: }
1242: $items=~s/\&$//;
1243: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1244: if (!$uname) { $uname=$ENV{'user.name'}; }
1245: my $uhome=&homeserver($uname,$udomain);
1246:
1247: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1248: my @pairs=split(/\&/,$rep);
1249: my %returnhash=();
1250: my $i=0;
1251: foreach (@$storearr) {
1252: $returnhash{$_}=unescape($pairs[$i]);
1253: $i++;
1254: }
1255: return %returnhash;
1256: }
1257:
1258: # --------------------------------------------------------------- del interface
1259:
1260: sub del {
1261: my ($namespace,$storearr,$udomain,$uname)=@_;
1262: my $items='';
1263: foreach (@$storearr) {
1264: $items.=escape($_).'&';
1265: }
1266: $items=~s/\&$//;
1267: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1268: if (!$uname) { $uname=$ENV{'user.name'}; }
1269: my $uhome=&homeserver($uname,$udomain);
1270:
1271: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1272: }
1273:
1274: # -------------------------------------------------------------- dump interface
1275:
1276: sub dump {
1277: my ($namespace,$udomain,$uname,$regexp)=@_;
1278: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1279: if (!$uname) { $uname=$ENV{'user.name'}; }
1280: my $uhome=&homeserver($uname,$udomain);
1281: if ($regexp) {
1282: $regexp=&escape($regexp);
1283: } else {
1284: $regexp='.';
1285: }
1286: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1287: my @pairs=split(/\&/,$rep);
1288: my %returnhash=();
1289: foreach (@pairs) {
1290: my ($key,$value)=split(/=/,$_);
1291: $returnhash{unescape($key)}=unescape($value);
1292: }
1293: return %returnhash;
1294: }
1295:
1296: # --------------------------------------------------------------- put interface
1297:
1298: sub put {
1299: my ($namespace,$storehash,$udomain,$uname)=@_;
1300: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1301: if (!$uname) { $uname=$ENV{'user.name'}; }
1302: my $uhome=&homeserver($uname,$udomain);
1303: my $items='';
1304: foreach (keys %$storehash) {
1305: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1306: }
1307: $items=~s/\&$//;
1308: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1309: }
1310:
1311: # ------------------------------------------------------ critical put interface
1312:
1313: sub cput {
1314: my ($namespace,$storehash,$udomain,$uname)=@_;
1315: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1316: if (!$uname) { $uname=$ENV{'user.name'}; }
1317: my $uhome=&homeserver($uname,$udomain);
1318: my $items='';
1319: foreach (keys %$storehash) {
1320: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1321: }
1322: $items=~s/\&$//;
1323: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1324: }
1325:
1326: # -------------------------------------------------------------- eget interface
1327:
1328: sub eget {
1329: my ($namespace,$storearr,$udomain,$uname)=@_;
1330: my $items='';
1331: foreach (@$storearr) {
1332: $items.=escape($_).'&';
1333: }
1334: $items=~s/\&$//;
1335: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1336: if (!$uname) { $uname=$ENV{'user.name'}; }
1337: my $uhome=&homeserver($uname,$udomain);
1338: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1339: my @pairs=split(/\&/,$rep);
1340: my %returnhash=();
1341: my $i=0;
1342: foreach (@$storearr) {
1343: $returnhash{$_}=unescape($pairs[$i]);
1344: $i++;
1345: }
1346: return %returnhash;
1347: }
1348:
1349: # ------------------------------------------------- Check for a user privilege
1350:
1351: sub allowed {
1352: my ($priv,$uri)=@_;
1353:
1354: my $orguri=$uri;
1355: $uri=&declutter($uri);
1356:
1357: # Free bre access to adm and meta resources
1358:
1359: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1360: return 'F';
1361: }
1362:
1363: # Free bre to public access
1364:
1365: if ($priv eq 'bre') {
1366: if (&metadata($uri,'copyright') eq 'public') { return 'F'; }
1367: }
1368:
1369: my $thisallowed='';
1370: my $statecond=0;
1371: my $courseprivid='';
1372:
1373: # Course
1374:
1375: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1376: $thisallowed.=$1;
1377: }
1378:
1379: # Domain
1380:
1381: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1382: =~/$priv\&([^\:]*)/) {
1383: $thisallowed.=$1;
1384: }
1385:
1386: # Course: uri itself is a course
1387: my $courseuri=$uri;
1388: $courseuri=~s/\_(\d)/\/$1/;
1389: $courseuri=~s/^([^\/])/\/$1/;
1390:
1391: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1392: =~/$priv\&([^\:]*)/) {
1393: $thisallowed.=$1;
1394: }
1395:
1396: # Full access at system, domain or course-wide level? Exit.
1397:
1398: if ($thisallowed=~/F/) {
1399: return 'F';
1400: }
1401:
1402: # If this is generating or modifying users, exit with special codes
1403:
1404: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1405: return $thisallowed;
1406: }
1407: #
1408: # Gathered so far: system, domain and course wide privileges
1409: #
1410: # Course: See if uri or referer is an individual resource that is part of
1411: # the course
1412:
1413: if ($ENV{'request.course.id'}) {
1414: $courseprivid=$ENV{'request.course.id'};
1415: if ($ENV{'request.course.sec'}) {
1416: $courseprivid.='/'.$ENV{'request.course.sec'};
1417: }
1418: $courseprivid=~s/\_/\//;
1419: my $checkreferer=1;
1420: my @uriparts=split(/\//,$uri);
1421: my $filename=$uriparts[$#uriparts];
1422: my $pathname=$uri;
1423: $pathname=~s/\/$filename$//;
1424: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1425: /\&$filename\:([\d\|]+)\&/) {
1426: $statecond=$1;
1427: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1428: =~/$priv\&([^\:]*)/) {
1429: $thisallowed.=$1;
1430: $checkreferer=0;
1431: }
1432: }
1433:
1434: if ($checkreferer) {
1435: my $refuri=$ENV{'httpref.'.$orguri};
1436:
1437: unless ($refuri) {
1438: foreach (keys %ENV) {
1439: if ($_=~/^httpref\..*\*/) {
1440: my $pattern=$_;
1441: $pattern=~s/^httpref\.\/res\///;
1442: $pattern=~s/\*/\[\^\/\]\+/g;
1443: $pattern=~s/\//\\\//g;
1444: if ($orguri=~/$pattern/) {
1445: $refuri=$ENV{$_};
1446: }
1447: }
1448: }
1449: }
1450: if ($refuri) {
1451: $refuri=&declutter($refuri);
1452: my @uriparts=split(/\//,$refuri);
1453: my $filename=$uriparts[$#uriparts];
1454: my $pathname=$refuri;
1455: $pathname=~s/\/$filename$//;
1456: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1457: /\&$filename\:([\d\|]+)\&/) {
1458: my $refstatecond=$1;
1459: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1460: =~/$priv\&([^\:]*)/) {
1461: $thisallowed.=$1;
1462: $uri=$refuri;
1463: $statecond=$refstatecond;
1464: }
1465: }
1466: }
1467: }
1468: }
1469:
1470: #
1471: # Gathered now: all privileges that could apply, and condition number
1472: #
1473: #
1474: # Full or no access?
1475: #
1476:
1477: if ($thisallowed=~/F/) {
1478: return 'F';
1479: }
1480:
1481: unless ($thisallowed) {
1482: return '';
1483: }
1484:
1485: # Restrictions exist, deal with them
1486: #
1487: # C:according to course preferences
1488: # R:according to resource settings
1489: # L:unless locked
1490: # X:according to user session state
1491: #
1492:
1493: # Possibly locked functionality, check all courses
1494: # Locks might take effect only after 10 minutes cache expiration for other
1495: # courses, and 2 minutes for current course
1496:
1497: my $envkey;
1498: if ($thisallowed=~/L/) {
1499: foreach $envkey (keys %ENV) {
1500: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1501: my $courseid=$2;
1502: my $roleid=$1.'.'.$2;
1503: $courseid=~s/^\///;
1504: my $expiretime=600;
1505: if ($ENV{'request.role'} eq $roleid) {
1506: $expiretime=120;
1507: }
1508: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1509: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1510: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1511: &coursedescription($courseid);
1512: }
1513: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1514: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1515: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1516: &log($ENV{'user.domain'},$ENV{'user.name'},
1517: $ENV{'user.host'},
1518: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1519: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1520: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1521: return '';
1522: }
1523: }
1524: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1525: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1526: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1527: &log($ENV{'user.domain'},$ENV{'user.name'},
1528: $ENV{'user.host'},
1529: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1530: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1531: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1532: return '';
1533: }
1534: }
1535: }
1536: }
1537: }
1538:
1539: #
1540: # Rest of the restrictions depend on selected course
1541: #
1542:
1543: unless ($ENV{'request.course.id'}) {
1544: return '1';
1545: }
1546:
1547: #
1548: # Now user is definitely in a course
1549: #
1550:
1551:
1552: # Course preferences
1553:
1554: if ($thisallowed=~/C/) {
1555: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1556: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1557: =~/$rolecode/) {
1558: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1559: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1560: $ENV{'request.course.id'});
1561: return '';
1562: }
1563: }
1564:
1565: # Resource preferences
1566:
1567: if ($thisallowed=~/R/) {
1568: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1569: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1570: if (-e $filename) {
1571: my @content;
1572: {
1573: my $fh=Apache::File->new($filename);
1574: @content=<$fh>;
1575: }
1576: if (join('',@content)=~
1577: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1578: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1579: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1580: return '';
1581:
1582: }
1583: }
1584: }
1585:
1586: # Restricted by state?
1587:
1588: if ($thisallowed=~/X/) {
1589: if (&condval($statecond)) {
1590: return '2';
1591: } else {
1592: return '';
1593: }
1594: }
1595:
1596: return 'F';
1597: }
1598:
1599: # ----------------------------------------------------------------- Define Role
1600:
1601: sub definerole {
1602: if (allowed('mcr','/')) {
1603: my ($rolename,$sysrole,$domrole,$courole)=@_;
1604: foreach (split('/',$sysrole)) {
1605: my ($crole,$cqual)=split(/\&/,$_);
1606: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1607: if ($pr{'cr:s'}=~/$crole\&/) {
1608: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1609: return "refused:s:$crole&$cqual";
1610: }
1611: }
1612: }
1613: foreach (split('/',$domrole)) {
1614: my ($crole,$cqual)=split(/\&/,$_);
1615: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1616: if ($pr{'cr:d'}=~/$crole\&/) {
1617: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1618: return "refused:d:$crole&$cqual";
1619: }
1620: }
1621: }
1622: foreach (split('/',$courole)) {
1623: my ($crole,$cqual)=split(/\&/,$_);
1624: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1625: if ($pr{'cr:c'}=~/$crole\&/) {
1626: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1627: return "refused:c:$crole&$cqual";
1628: }
1629: }
1630: }
1631: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1632: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1633: "rolesdef_$rolename=".
1634: escape($sysrole.'_'.$domrole.'_'.$courole);
1635: return reply($command,$ENV{'user.home'});
1636: } else {
1637: return 'refused';
1638: }
1639: }
1640:
1641: # ---------------- Make a metadata query against the network of library servers
1642:
1643: sub metadata_query {
1644: my ($query,$custom,$customshow)=@_;
1645: my %rhash;
1646: for my $server (keys %libserv) {
1647: unless ($custom or $customshow) {
1648: my $reply=&reply("querysend:".&escape($query),$server);
1649: $rhash{$server}=$reply;
1650: }
1651: else {
1652: my $reply=&reply("querysend:".&escape($query).':'.
1653: &escape($custom).':'.&escape($customshow),
1654: $server);
1655: $rhash{$server}=$reply;
1656: }
1657: }
1658: return \%rhash;
1659: }
1660:
1661: # ------------------------------------------------------------------ Plain Text
1662:
1663: sub plaintext {
1664: my $short=shift;
1665: return $prp{$short};
1666: }
1667:
1668: # ----------------------------------------------------------------- Assign Role
1669:
1670: sub assignrole {
1671: my ($udom,$uname,$url,$role,$end,$start)=@_;
1672: my $mrole;
1673: if ($role =~ /^cr\//) {
1674: unless (&allowed('ccr',$url)) {
1675: &logthis('Refused custom assignrole: '.
1676: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1677: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1678: return 'refused';
1679: }
1680: $mrole='cr';
1681: } else {
1682: my $cwosec=$url;
1683: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1684: unless (&allowed('c'.$role,$cwosec)) {
1685: &logthis('Refused assignrole: '.
1686: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1687: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1688: return 'refused';
1689: }
1690: $mrole=$role;
1691: }
1692: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1693: "$udom:$uname:$url".'_'."$mrole=$role";
1694: if ($end) { $command.='_'.$end; }
1695: if ($start) {
1696: if ($end) {
1697: $command.='_'.$start;
1698: } else {
1699: $command.='_0_'.$start;
1700: }
1701: }
1702: return &reply($command,&homeserver($uname,$udom));
1703: }
1704:
1705: # -------------------------------------------------- Modify user authentication
1706: sub modifyuserauth {
1707: my ($udom,$uname,$umode,$upass)=@_;
1708: my $uhome=&homeserver($uname,$udom);
1709: &logthis('Call to modify user authentication'.$udom.', '.$uname.', '.
1710: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1711: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
1712: &escape($upass),$uhome);
1713: unless ($reply eq 'ok') {
1714: return 'error: '.$reply;
1715: }
1716: return 'ok';
1717: }
1718:
1719: # --------------------------------------------------------------- Modify a user
1720:
1721:
1722: sub modifyuser {
1723: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1724: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1725: $umode.', '.$first.', '.$middle.', '.
1726: $last.', '.$gene.' by '.
1727: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1728: my $uhome=&homeserver($uname,$udom);
1729: # ----------------------------------------------------------------- Create User
1730: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1731: my $unhome='';
1732: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1733: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1734: } else {
1735: my $tryserver;
1736: my $loadm=10000000;
1737: foreach $tryserver (keys %libserv) {
1738: if ($hostdom{$tryserver} eq $udom) {
1739: my $answer=reply('load',$tryserver);
1740: if (($answer=~/\d+/) && ($answer<$loadm)) {
1741: $loadm=$answer;
1742: $unhome=$tryserver;
1743: }
1744: }
1745: }
1746: }
1747: if (($unhome eq '') || ($unhome eq 'no_host')) {
1748: return 'error: find home';
1749: }
1750: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1751: &escape($upass),$unhome);
1752: unless ($reply eq 'ok') {
1753: return 'error: '.$reply;
1754: }
1755: $uhome=&homeserver($uname,$udom);
1756: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1757: return 'error: verify home';
1758: }
1759: }
1760: # ---------------------------------------------------------------------- Add ID
1761: if ($uid) {
1762: $uid=~tr/A-Z/a-z/;
1763: my %uidhash=&idrget($udom,$uname);
1764: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1765: unless ($uid eq $uidhash{$uname}) {
1766: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1767: }
1768: } else {
1769: &idput($udom,($uname => $uid));
1770: }
1771: }
1772: # -------------------------------------------------------------- Add names, etc
1773: my %names=&get('environment',
1774: ['firstname','middlename','lastname','generation'],
1775: $udom,$uname);
1776: if ($first) { $names{'firstname'} = $first; }
1777: if ($middle) { $names{'middlename'} = $middle; }
1778: if ($last) { $names{'lastname'} = $last; }
1779: if ($gene) { $names{'generation'} = $gene; }
1780: my $reply = &put('environment', \%names, $udom,$uname);
1781: if ($reply ne 'ok') { return 'error: '.$reply; }
1782: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1783: $umode.', '.$first.', '.$middle.', '.
1784: $last.', '.$gene.' by '.
1785: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1786: return 'ok';
1787: }
1788:
1789: # -------------------------------------------------------------- Modify student
1790:
1791: sub modifystudent {
1792: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1793: $end,$start)=@_;
1794: my $cid='';
1795: unless ($cid=$ENV{'request.course.id'}) {
1796: return 'not_in_class';
1797: }
1798: # --------------------------------------------------------------- Make the user
1799: my $reply=&modifyuser
1800: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1801: unless ($reply eq 'ok') { return $reply; }
1802: my $uhome=&homeserver($uname,$udom);
1803: if (($uhome eq '') || ($uhome eq 'no_host')) {
1804: return 'error: no such user';
1805: }
1806: # -------------------------------------------------- Add student to course list
1807: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1808: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1809: &escape($uname.':'.$udom).'='.
1810: &escape($end.':'.$start),
1811: $ENV{'course.'.$cid.'.home'});
1812: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1813: return 'error: '.$reply;
1814: }
1815: # ---------------------------------------------------- Add student role to user
1816: my $uurl='/'.$cid;
1817: $uurl=~s/\_/\//g;
1818: if ($usec) {
1819: $uurl.='/'.$usec;
1820: }
1821: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1822: }
1823:
1824: # ------------------------------------------------- Write to course preferences
1825:
1826: sub writecoursepref {
1827: my ($courseid,%prefs)=@_;
1828: $courseid=~s/^\///;
1829: $courseid=~s/\_/\//g;
1830: my ($cdomain,$cnum)=split(/\//,$courseid);
1831: my $chome=homeserver($cnum,$cdomain);
1832: if (($chome eq '') || ($chome eq 'no_host')) {
1833: return 'error: no such course';
1834: }
1835: my $cstring='';
1836: foreach (keys %prefs) {
1837: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1838: }
1839: $cstring=~s/\&$//;
1840: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1841: }
1842:
1843: # ---------------------------------------------------------- Make/modify course
1844:
1845: sub createcourse {
1846: my ($udom,$description,$url)=@_;
1847: $url=&declutter($url);
1848: my $cid='';
1849: unless (&allowed('ccc',$ENV{'user.domain'})) {
1850: return 'refused';
1851: }
1852: unless ($udom eq $ENV{'user.domain'}) {
1853: return 'refused';
1854: }
1855: # ------------------------------------------------------------------- Create ID
1856: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1857: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1858: # ----------------------------------------------- Make sure that does not exist
1859: my $uhome=&homeserver($uname,$udom);
1860: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1861: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1862: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1863: $uhome=&homeserver($uname,$udom);
1864: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1865: return 'error: unable to generate unique course-ID';
1866: }
1867: }
1868: # ------------------------------------------------------------- Make the course
1869: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1870: $ENV{'user.home'});
1871: unless ($reply eq 'ok') { return 'error: '.$reply; }
1872: $uhome=&homeserver($uname,$udom);
1873: if (($uhome eq '') || ($uhome eq 'no_host')) {
1874: return 'error: no such course';
1875: }
1876: &writecoursepref($udom.'_'.$uname,
1877: ('description' => $description,
1878: 'url' => $url));
1879: return '/'.$udom.'/'.$uname;
1880: }
1881:
1882: # ---------------------------------------------------------- Assign Custom Role
1883:
1884: sub assigncustomrole {
1885: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1886: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1887: $end,$start);
1888: }
1889:
1890: # ----------------------------------------------------------------- Revoke Role
1891:
1892: sub revokerole {
1893: my ($udom,$uname,$url,$role)=@_;
1894: my $now=time;
1895: return &assignrole($udom,$uname,$url,$role,$now);
1896: }
1897:
1898: # ---------------------------------------------------------- Revoke Custom Role
1899:
1900: sub revokecustomrole {
1901: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1902: my $now=time;
1903: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1904: }
1905:
1906: # ------------------------------------------------------------ Directory lister
1907:
1908: sub dirlist {
1909: my $uri=shift;
1910: $uri=~s/^\///;
1911: $uri=~s/\/$//;
1912: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1913: if ($udom) {
1914: if ($uname) {
1915: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1916: homeserver($uname,$udom));
1917: return split(/:/,$listing);
1918: } else {
1919: my $tryserver;
1920: my %allusers=();
1921: foreach $tryserver (keys %libserv) {
1922: if ($hostdom{$tryserver} eq $udom) {
1923: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1924: $tryserver);
1925: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1926: && ($listing ne 'con_lost')) {
1927: foreach (split(/:/,$listing)) {
1928: my ($entry,@stat)=split(/&/,$_);
1929: $allusers{$entry}=1;
1930: }
1931: }
1932: }
1933: }
1934: my $alluserstr='';
1935: foreach (sort keys %allusers) {
1936: $alluserstr.=$_.'&user:';
1937: }
1938: $alluserstr=~s/:$//;
1939: return split(/:/,$alluserstr);
1940: }
1941: } else {
1942: my $tryserver;
1943: my %alldom=();
1944: foreach $tryserver (keys %libserv) {
1945: $alldom{$hostdom{$tryserver}}=1;
1946: }
1947: my $alldomstr='';
1948: foreach (sort keys %alldom) {
1949: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1950: }
1951: $alldomstr=~s/:$//;
1952: return split(/:/,$alldomstr);
1953: }
1954: }
1955:
1956: # -------------------------------------------------------- Value of a Condition
1957:
1958: sub directcondval {
1959: my $number=shift;
1960: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1961: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1962: } else {
1963: return 2;
1964: }
1965: }
1966:
1967: sub condval {
1968: my $condidx=shift;
1969: my $result=0;
1970: my $allpathcond='';
1971: foreach (split(/\|/,$condidx)) {
1972: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1973: $allpathcond.=
1974: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1975: }
1976: }
1977: $allpathcond=~s/\|$//;
1978: if ($ENV{'request.course.id'}) {
1979: if ($allpathcond) {
1980: my $operand='|';
1981: my @stack;
1982: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
1983: if ($_ eq '(') {
1984: push @stack,($operand,$result)
1985: } elsif ($_ eq ')') {
1986: my $before=pop @stack;
1987: if (pop @stack eq '&') {
1988: $result=$result>$before?$before:$result;
1989: } else {
1990: $result=$result>$before?$result:$before;
1991: }
1992: } elsif (($_ eq '&') || ($_ eq '|')) {
1993: $operand=$_;
1994: } else {
1995: my $new=directcondval($_);
1996: if ($operand eq '&') {
1997: $result=$result>$new?$new:$result;
1998: } else {
1999: $result=$result>$new?$result:$new;
2000: }
2001: }
2002: }
2003: }
2004: }
2005: return $result;
2006: }
2007:
2008: # --------------------------------------------------------- Value of a Variable
2009:
2010: sub EXT {
2011: my ($varname,$symbparm)=@_;
2012: unless ($varname) { return ''; }
2013: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2014: my $rest;
2015: if ($therest[0]) {
2016: $rest=join('.',@therest);
2017: } else {
2018: $rest='';
2019: }
2020: my $qualifierrest=$qualifier;
2021: if ($rest) { $qualifierrest.='.'.$rest; }
2022: my $spacequalifierrest=$space;
2023: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2024: if ($realm eq 'user') {
2025: # --------------------------------------------------------------- user.resource
2026: if ($space eq 'resource') {
2027: my %restored=&restore();
2028: return $restored{$qualifierrest};
2029: # ----------------------------------------------------------------- user.access
2030: } elsif ($space eq 'access') {
2031: return &allowed($qualifier,$rest);
2032: # ------------------------------------------ user.preferences, user.environment
2033: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2034: return $ENV{join('.',('environment',$qualifierrest))};
2035: # ----------------------------------------------------------------- user.course
2036: } elsif ($space eq 'course') {
2037: return $ENV{join('.',('request.course',$qualifier))};
2038: # ------------------------------------------------------------------- user.role
2039: } elsif ($space eq 'role') {
2040: my ($role,$where)=split(/\./,$ENV{'request.role'});
2041: if ($qualifier eq 'value') {
2042: return $role;
2043: } elsif ($qualifier eq 'extent') {
2044: return $where;
2045: }
2046: # ----------------------------------------------------------------- user.domain
2047: } elsif ($space eq 'domain') {
2048: return $ENV{'user.domain'};
2049: # ------------------------------------------------------------------- user.name
2050: } elsif ($space eq 'name') {
2051: return $ENV{'user.name'};
2052: # ---------------------------------------------------- Any other user namespace
2053: } else {
2054: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2055: my %reply=&get($space,[$item]);
2056: return $reply{$item};
2057: }
2058: } elsif ($realm eq 'request') {
2059: # ------------------------------------------------------------- request.browser
2060: if ($space eq 'browser') {
2061: return $ENV{'browser.'.$qualifier};
2062: # ------------------------------------------------------------ request.filename
2063: } else {
2064: return $ENV{'request.'.$spacequalifierrest};
2065: }
2066: } elsif ($realm eq 'course') {
2067: # ---------------------------------------------------------- course.description
2068: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
2069: $spacequalifierrest};
2070: } elsif ($realm eq 'resource') {
2071: if ($ENV{'request.course.id'}) {
2072:
2073: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2074:
2075:
2076: # ----------------------------------------------------- Cascading lookup scheme
2077: my $symbp;
2078: if ($symbparm) {
2079: $symbp=$symbparm;
2080: } else {
2081: $symbp=&symbread();
2082: }
2083: my $mapp=(split(/\_\_\_/,$symbp))[0];
2084:
2085: my $symbparm=$symbp.'.'.$spacequalifierrest;
2086: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2087:
2088: my $seclevel=
2089: $ENV{'request.course.id'}.'.['.
2090: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
2091: my $seclevelr=
2092: $ENV{'request.course.id'}.'.['.
2093: $ENV{'request.course.sec'}.'].'.$symbparm;
2094: my $seclevelm=
2095: $ENV{'request.course.id'}.'.['.
2096: $ENV{'request.course.sec'}.'].'.$mapparm;
2097:
2098: my $courselevel=
2099: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
2100: my $courselevelr=
2101: $ENV{'request.course.id'}.'.'.$symbparm;
2102: my $courselevelm=
2103: $ENV{'request.course.id'}.'.'.$mapparm;
2104:
2105: # ----------------------------------------------------------- first, check user
2106: my %resourcedata=get('resourcedata',
2107: [$courselevelr,$courselevelm,$courselevel]);
2108: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2109: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2110:
2111: if ($resourcedata{$courselevelr}) {
2112: return $resourcedata{$courselevelr}; }
2113: if ($resourcedata{$courselevelm}) {
2114: return $resourcedata{$courselevelm}; }
2115: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
2116:
2117: } else {
2118: if ($resourcedata{$courselevelr}!~/No such file/) {
2119: &logthis("<font color=blue>WARNING:".
2120: " Trying to get resource data for ".$ENV{'user.name'}." at "
2121: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
2122: "</font>");
2123: }
2124: }
2125:
2126: # -------------------------------------------------------- second, check course
2127:
2128: my $reply=&reply('get:'.
2129: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
2130: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2131: ':resourcedata:'.
2132: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
2133: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
2134: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
2135: if ($reply!~/^error\:/) {
2136: foreach (split(/\&/,$reply)) {
2137: if ($_) { return &unescape($_); }
2138: }
2139: }
2140: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
2141: &logthis("<font color=blue>WARNING:".
2142: " Getting ".$reply." asking for ".$varname." for ".
2143: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2144: ' at '.
2145: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
2146: ' from '.
2147: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
2148: "</font>");
2149: }
2150: # ------------------------------------------------------ third, check map parms
2151: my %parmhash=();
2152: my $thisparm='';
2153: if (tie(%parmhash,'GDBM_File',
2154: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
2155: $thisparm=$parmhash{$symbparm};
2156: untie(%parmhash);
2157: }
2158: if ($thisparm) { return $thisparm; }
2159: }
2160:
2161: # --------------------------------------------- last, look in resource metadata
2162:
2163: $spacequalifierrest=~s/\./\_/;
2164: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2165: if ($metadata) { return $metadata; }
2166: $metadata=&metadata($ENV{'request.filename'},
2167: 'parameter_'.$spacequalifierrest);
2168: if ($metadata) { return $metadata; }
2169:
2170: # ------------------------------------------------------------------ Cascade up
2171:
2172: unless ($space eq '0') {
2173: my ($part,$id)=split(/\_/,$space);
2174: if ($id) {
2175: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2176: $symbparm);
2177: if ($partgeneral) { return $partgeneral; }
2178: } else {
2179: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2180: $symbparm);
2181: if ($resourcegeneral) { return $resourcegeneral; }
2182: }
2183: }
2184:
2185: # ---------------------------------------------------- Any other user namespace
2186: } elsif ($realm eq 'environment') {
2187: # ----------------------------------------------------------------- environment
2188: return $ENV{'environment.'.$spacequalifierrest};
2189: } elsif ($realm eq 'system') {
2190: # ----------------------------------------------------------------- system.time
2191: if ($space eq 'time') {
2192: return time;
2193: }
2194: }
2195: return '';
2196: }
2197:
2198: # ---------------------------------------------------------------- Get metadata
2199:
2200: sub metadata {
2201: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2202:
2203: $uri=&declutter($uri);
2204: my $filename=$uri;
2205: $uri=~s/\.meta$//;
2206: #
2207: # Is the metadata already cached?
2208: # Look at timestamp of caching
2209: # Everything is cached by the main uri, libraries are never directly cached
2210: #
2211: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2212: #
2213: # Is this a recursive call for a library?
2214: #
2215: if ($liburi) {
2216: $liburi=&declutter($liburi);
2217: $filename=$liburi;
2218: }
2219: my %metathesekeys=();
2220: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2221: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2222: my $parser=HTML::TokeParser->new(\$metastring);
2223: my $token;
2224: undef %metathesekeys;
2225: while ($token=$parser->get_token) {
2226: if ($token->[0] eq 'S') {
2227: if (defined($token->[2]->{'package'})) {
2228: #
2229: # This is a package - get package info
2230: #
2231: my $package=$token->[2]->{'package'};
2232: my $keyroot='';
2233: if ($prefix) {
2234: $keyroot.='_'.$prefix;
2235: } else {
2236: if (defined($token->[2]->{'part'})) {
2237: $keyroot.='_'.$token->[2]->{'part'};
2238: }
2239: }
2240: if (defined($token->[2]->{'id'})) {
2241: $keyroot.='_'.$token->[2]->{'id'};
2242: }
2243: if ($metacache{$uri.':packages'}) {
2244: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2245: } else {
2246: $metacache{$uri.':packages'}=$package.$keyroot;
2247: }
2248: foreach (keys %packagetab) {
2249: if ($_=~/^$package\&/) {
2250: my ($pack,$name,$subp)=split(/\&/,$_);
2251: my $value=$packagetab{$_};
2252: my $part=$keyroot;
2253: $part=~s/^\_//;
2254: if ($subp eq 'display') {
2255: $value.=' [Part: '.$part.']';
2256: }
2257: my $unikey='parameter'.$keyroot.'_'.$name;
2258: $metathesekeys{$unikey}=1;
2259: $metacache{$uri.':'.$unikey.'.part'}=$part;
2260: unless
2261: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2262: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2263: }
2264: }
2265: }
2266: } else {
2267: #
2268: # This is not a package - some other kind of start tag
2269: #
2270: my $entry=$token->[1];
2271: my $unikey;
2272: if ($entry eq 'import') {
2273: $unikey='';
2274: } else {
2275: $unikey=$entry;
2276: }
2277: if ($prefix) {
2278: $unikey.=$prefix;
2279: } else {
2280: if (defined($token->[2]->{'part'})) {
2281: $unikey.='_'.$token->[2]->{'part'};
2282: }
2283: }
2284: if (defined($token->[2]->{'id'})) {
2285: $unikey.='_'.$token->[2]->{'id'};
2286: }
2287:
2288: if ($entry eq 'import') {
2289: #
2290: # Importing a library here
2291: #
2292: if (defined($depthcount)) { $depthcount++; } else
2293: { $depthcount=0; }
2294: if ($depthcount<20) {
2295: foreach (split(/\,/,&metadata($uri,'keys',
2296: $parser->get_text('/import'),$unikey,
2297: $depthcount))) {
2298: $metathesekeys{$_}=1;
2299: }
2300: }
2301: } else {
2302:
2303: if (defined($token->[2]->{'name'})) {
2304: $unikey.='_'.$token->[2]->{'name'};
2305: }
2306: $metathesekeys{$unikey}=1;
2307: foreach (@{$token->[3]}) {
2308: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2309: }
2310: unless (
2311: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
2312: ) { $metacache{$uri.':'.$unikey}=
2313: $metacache{$uri.':'.$unikey.'.default'};
2314: }
2315: # end of not-a-package not-a-library import
2316: }
2317: # end of not-a-package start tag
2318: }
2319: # the next is the end of "start tag"
2320: }
2321: }
2322: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2323: $metacache{$uri.':cachedtimestamp'}=time;
2324: # this is the end of "was not already recently cached
2325: }
2326: return $metacache{$uri.':'.$what};
2327: }
2328:
2329: # ------------------------------------------------- Update symbolic store links
2330:
2331: sub symblist {
2332: my ($mapname,%newhash)=@_;
2333: $mapname=declutter($mapname);
2334: my %hash;
2335: if (($ENV{'request.course.fn'}) && (%newhash)) {
2336: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2337: &GDBM_WRCREAT,0640)) {
2338: foreach (keys %newhash) {
2339: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2340: }
2341: if (untie(%hash)) {
2342: return 'ok';
2343: }
2344: }
2345: }
2346: return 'error';
2347: }
2348:
2349: # ------------------------------------------------------ Return symb list entry
2350:
2351: sub symbread {
2352: my $thisfn=shift;
2353: unless ($thisfn) {
2354: if ($ENV{'request.symb'}) { return $ENV{'request.symb'}; }
2355: $thisfn=$ENV{'request.filename'};
2356: }
2357: $thisfn=declutter($thisfn);
2358: my %hash;
2359: my %bighash;
2360: my $syval='';
2361: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2362: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2363: &GDBM_READER,0640)) {
2364: $syval=$hash{$thisfn};
2365: untie(%hash);
2366: }
2367: # ---------------------------------------------------------- There was an entry
2368: if ($syval) {
2369: unless ($syval=~/\_\d+$/) {
2370: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2371: &appenv('request.ambiguous' => $thisfn);
2372: return '';
2373: }
2374: $syval.=$1;
2375: }
2376: } else {
2377: # ------------------------------------------------------- Was not in symb table
2378: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2379: &GDBM_READER,0640)) {
2380: # ---------------------------------------------- Get ID(s) for current resource
2381: my $ids=$bighash{'ids_/res/'.$thisfn};
2382: unless ($ids) {
2383: $ids=$bighash{'ids_/'.$thisfn};
2384: }
2385: if ($ids) {
2386: # ------------------------------------------------------------------- Has ID(s)
2387: my @possibilities=split(/\,/,$ids);
2388: if ($#possibilities==0) {
2389: # ----------------------------------------------- There is only one possibility
2390: my ($mapid,$resid)=split(/\./,$ids);
2391: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2392: } else {
2393: # ------------------------------------------ There is more than one possibility
2394: my $realpossible=0;
2395: foreach (@possibilities) {
2396: my $file=$bighash{'src_'.$_};
2397: if (&allowed('bre',$file)) {
2398: my ($mapid,$resid)=split(/\./,$_);
2399: if ($bighash{'map_type_'.$mapid} ne 'page') {
2400: $realpossible++;
2401: $syval=declutter($bighash{'map_id_'.$mapid}).
2402: '___'.$resid;
2403: }
2404: }
2405: }
2406: if ($realpossible!=1) { $syval=''; }
2407: }
2408: }
2409: untie(%bighash)
2410: }
2411: }
2412: if ($syval) {
2413: return $syval.'___'.$thisfn;
2414: }
2415: }
2416: &appenv('request.ambiguous' => $thisfn);
2417: return '';
2418: }
2419:
2420: # ---------------------------------------------------------- Return random seed
2421:
2422: sub numval {
2423: my $txt=shift;
2424: $txt=~tr/A-J/0-9/;
2425: $txt=~tr/a-j/0-9/;
2426: $txt=~tr/K-T/0-9/;
2427: $txt=~tr/k-t/0-9/;
2428: $txt=~tr/U-Z/0-5/;
2429: $txt=~tr/u-z/0-5/;
2430: $txt=~s/\D//g;
2431: return int($txt);
2432: }
2433:
2434: sub rndseed {
2435: my ($symb,$courseid,$domain,$username)=@_;
2436: if (!$symb) {
2437: unless ($symb=&symbread()) { return time; }
2438: }
2439: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2440: if (!$domain) {$domain=$ENV{'user.domain'};}
2441: if (!$username) {$username=$ENV{'user.name'};}
2442: {
2443: use integer;
2444: my $symbchck=unpack("%32C*",$symb) << 27;
2445: my $symbseed=numval($symb) << 22;
2446: my $namechck=unpack("%32C*",$username) << 17;
2447: my $nameseed=numval($username) << 12;
2448: my $domainseed=unpack("%32C*",$domain) << 7;
2449: my $courseseed=unpack("%32C*",$courseid);
2450: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2451: #uncommenting these lines can break things!
2452: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2453: #&Apache::lonxml::debug("rndseed :$num:$symb");
2454: return $num;
2455: }
2456: }
2457:
2458: sub ireceipt {
2459: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2460: my $cuname=unpack("%32C*",$funame);
2461: my $cudom=unpack("%32C*",$fudom);
2462: my $cucourseid=unpack("%32C*",$fucourseid);
2463: my $cusymb=unpack("%32C*",$fusymb);
2464: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2465: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2466: ($cunique%$cuname+
2467: $cunique%$cudom+
2468: $cusymb%$cuname+
2469: $cusymb%$cudom+
2470: $cucourseid%$cuname+
2471: $cucourseid%$cudom);
2472: }
2473:
2474: sub receipt {
2475: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2476: $ENV{'request.course.id'},&symbread());
2477: }
2478:
2479: # ------------------------------------------------------------ Serves up a file
2480: # returns either the contents of the file or a -1
2481: sub getfile {
2482: my $file=shift;
2483: &repcopy($file);
2484: if (! -e $file ) { return -1; };
2485: my $fh=Apache::File->new($file);
2486: my $a='';
2487: while (<$fh>) { $a .=$_; }
2488: return $a
2489: }
2490:
2491: sub filelocation {
2492: my ($dir,$file) = @_;
2493: my $location;
2494: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2495: if ($file=~m:^/~:) { # is a contruction space reference
2496: $location = $file;
2497: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2498: } else {
2499: $file=~s/^$perlvar{'lonDocRoot'}//;
2500: $file=~s:^/*res::;
2501: if ( !( $file =~ m:^/:) ) {
2502: $location = $dir. '/'.$file;
2503: } else {
2504: $location = '/home/httpd/html/res'.$file;
2505: }
2506: }
2507: $location=~s://+:/:g; # remove duplicate /
2508: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2509: return $location;
2510: }
2511:
2512: sub hreflocation {
2513: my ($dir,$file)=@_;
2514: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
2515: my $finalpath=filelocation($dir,$file);
2516: $finalpath=~s/^\/home\/httpd\/html//;
2517: return $finalpath;
2518: } else {
2519: return $file;
2520: }
2521: }
2522:
2523: # ------------------------------------------------------------- Declutters URLs
2524:
2525: sub declutter {
2526: my $thisfn=shift;
2527: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2528: $thisfn=~s/^\///;
2529: $thisfn=~s/^res\///;
2530: return $thisfn;
2531: }
2532:
2533: # -------------------------------------------------------- Escape Special Chars
2534:
2535: sub escape {
2536: my $str=shift;
2537: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2538: return $str;
2539: }
2540:
2541: # ----------------------------------------------------- Un-Escape Special Chars
2542:
2543: sub unescape {
2544: my $str=shift;
2545: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2546: return $str;
2547: }
2548:
2549: # ================================================================ Main Program
2550:
2551: sub goodbye {
2552: &flushcourselogs();
2553: &logthis("Shutting down");
2554: }
2555:
2556: BEGIN {
2557: # ------------------------------------------------------------ Read access.conf
2558: {
2559: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2560:
2561: while (my $configline=<$config>) {
2562: if ($configline =~ /PerlSetVar/) {
2563: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2564: chomp($varvalue);
2565: $perlvar{$varname}=$varvalue;
2566: }
2567: }
2568: }
2569:
2570: # ------------------------------------------------------------- Read hosts file
2571: {
2572: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2573:
2574: while (my $configline=<$config>) {
2575: chomp($configline);
2576: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2577: $hostname{$id}=$name;
2578: $hostdom{$id}=$domain;
2579: $hostip{$id}=$ip;
2580: if ($role eq 'library') { $libserv{$id}=$name; }
2581: }
2582: }
2583:
2584: # ------------------------------------------------------ Read spare server file
2585: {
2586: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2587:
2588: while (my $configline=<$config>) {
2589: chomp($configline);
2590: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2591: $spareid{$configline}=1;
2592: }
2593: }
2594: }
2595: # ------------------------------------------------------------ Read permissions
2596: {
2597: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2598:
2599: while (my $configline=<$config>) {
2600: chomp($configline);
2601: if ($configline) {
2602: my ($role,$perm)=split(/ /,$configline);
2603: if ($perm ne '') { $pr{$role}=$perm; }
2604: }
2605: }
2606: }
2607:
2608: # -------------------------------------------- Read plain texts for permissions
2609: {
2610: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2611:
2612: while (my $configline=<$config>) {
2613: chomp($configline);
2614: if ($configline) {
2615: my ($short,$plain)=split(/:/,$configline);
2616: if ($plain ne '') { $prp{$short}=$plain; }
2617: }
2618: }
2619: }
2620:
2621: # ---------------------------------------------------------- Read package table
2622: {
2623: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2624:
2625: while (my $configline=<$config>) {
2626: chomp($configline);
2627: my ($short,$plain)=split(/:/,$configline);
2628: my ($pack,$name)=split(/\&/,$short);
2629: if ($plain ne '') {
2630: $packagetab{$pack.'&'.$name.'&name'}=$name;
2631: $packagetab{$short}=$plain;
2632: }
2633: }
2634: }
2635:
2636: %metacache=();
2637:
2638: $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
2639: $dumpcount=0;
2640:
2641: &logtouch();
2642: &logthis('<font color=yellow>INFO: Read configuration</font>');
2643: }
2644:
2645: 1;
2646: __END__
2647:
2648: =head1 NAME
2649:
2650: Apache::lonnet - TCP networking package
2651:
2652: =head1 SYNOPSIS
2653:
2654: Invoked by other LON-CAPA modules.
2655:
2656: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
2657:
2658: =head1 INTRODUCTION
2659:
2660: This module provides subroutines which interact with the
2661: lonc/lond (TCP) network layer of LON-CAPA.
2662:
2663: This is part of the LearningOnline Network with CAPA project
2664: described at http://www.lon-capa.org.
2665:
2666: =head1 HANDLER SUBROUTINE
2667:
2668: There is no handler routine for this module.
2669:
2670: =head1 OTHER SUBROUTINES
2671:
2672: =over 4
2673:
2674: =item *
2675:
2676: logtouch() : make sure the logfile, lonnet.log, exists
2677:
2678: =item *
2679:
2680: logthis() : append message to lonnet.log
2681:
2682: =item *
2683:
2684: logperm() : append a permanent message to lonnet.perm.log
2685:
2686: =item *
2687:
2688: subreply() : non-critical communication, called by &reply
2689:
2690: =item *
2691:
2692: reply() : makes two attempts to pass message; logs refusals and rejections
2693:
2694: =item *
2695:
2696: reconlonc() : tries to reconnect lonc client processes.
2697:
2698: =item *
2699:
2700: critical() : passes a critical message to another server; if cannot get
2701: through then place message in connection buffer
2702:
2703: =item *
2704:
2705: appenv(%hash) : read in current user environment, append new environment
2706: values to make new user environment
2707:
2708: =item *
2709:
2710: delenv($varname) : read in current user environment, remove all values
2711: beginning with $varname, write new user environment (note: flock is used
2712: to prevent conflicting shared read/writes with file)
2713:
2714: =item *
2715:
2716: spareserver() : find server with least workload from spare.tab
2717:
2718: =item *
2719:
2720: queryauthenticate($uname,$udom) : try to determine user's current
2721: authentication scheme
2722:
2723: =item *
2724:
2725: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
2726: servers (first use the current one)
2727:
2728: =item *
2729:
2730: homeserver($uname,$udom) : find the homebase for a user from domain's lib
2731: servers
2732:
2733: =item *
2734:
2735: idget($udom,@ids) : find the usernames behind a list of IDs (returns hash:
2736: id=>name,id=>name)
2737:
2738: =item *
2739:
2740: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
2741: name=>id,name=>id)
2742:
2743: =item *
2744:
2745: idput($udom,%ids) : store away a list of names and associated IDs
2746:
2747: =item *
2748:
2749: usection($domain,$user,$courseid) : output of section name/number or '' for
2750: "not in course" and '-1' for "no section"
2751:
2752: =item *
2753:
2754: userenvironment($domain,$user,$what) : puts out any environment parameter
2755: for a user
2756:
2757: =item *
2758:
2759: subscribe($fname) : subscribe to a resource, return URL if possible
2760:
2761: =item *
2762:
2763: repcopy($filename) : replicate file
2764:
2765: =item *
2766:
2767: ssi($url,%hash) : server side include, does a complete request cycle on url to
2768: localhost, posts hash
2769:
2770: =item *
2771:
2772: log($domain,$name,$home,$message) : write to permanent log for user; use
2773: critical subroutine
2774:
2775: =item *
2776:
2777: flushcourselogs() : flush (save) buffer logs and access logs
2778:
2779: =item *
2780:
2781: courselog($what) : save message for course in hash
2782:
2783: =item *
2784:
2785: courseacclog($what) : save message for course using &courselog(). Perform
2786: special processing for specific resource types (problems, exams, quizzes, etc).
2787:
2788: =item *
2789:
2790: countacc($url) : count the number of accesses to a given URL
2791:
2792: =item *
2793:
2794: sub checkout($symb,$tuname,$tudom,$tcrsid) : check out an item
2795:
2796: =item *
2797:
2798: sub checkin($token) : check in an item
2799:
2800: =item *
2801:
2802: sub expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
2803:
2804: =item *
2805:
2806: devalidate($symb) : devalidate spreadsheets
2807:
2808: =item *
2809:
2810: hash2str(%hash) : convert a hash into a string complete with escaping and '='
2811: and '&' separators
2812:
2813: =item *
2814:
2815: str2hash($string) : convert string to hash using unescaping and splitting on
2816: '=' and '&'
2817:
2818: =item *
2819:
2820: tmpreset($symb,$namespace,$domain,$stuname) : temporary storage
2821:
2822: =item *
2823:
2824: tmprestore($symb,$namespace,$domain,$stuname) : temporary restore
2825:
2826: =item *
2827:
2828: store($storehash,$symb,$namespace,$domain,$stuname) : stores hash permanently
2829: for this url; hashref needs to be given and should be a \%hashname; the
2830: remaining args aren't required and if they aren't passed or are '' they will
2831: be derived from the ENV
2832:
2833: =item *
2834:
2835: cstore($storehash,$symb,$namespace,$domain,$stuname) : same as store but
2836: uses critical subroutine
2837:
2838: =item *
2839:
2840: restore($symb,$namespace,$domain,$stuname) : returns hash for this symb;
2841: all args are optional
2842:
2843: =item *
2844:
2845: coursedescription($courseid) : course description
2846:
2847: =item *
2848:
2849: rolesinit($domain,$username,$authhost) : get user privileges
2850:
2851: =item *
2852:
2853: get($namespace,$storearr,$udomain,$uname) : returns hash with keys from array
2854: reference filled in from namesp ($udomain and $uname are optional)
2855:
2856: =item *
2857:
2858: del($namespace,$storearr,$udomain,$uname) : deletes keys out of array from
2859: namesp ($udomain and $uname are optional)
2860:
2861: =item *
2862:
2863: dump($namespace,$udomain,$uname,$regexp) :
2864: dumps the complete (or key matching regexp) namespace into a hash
2865: ($udomain, $uname and $regexp are optional)
2866:
2867: =item *
2868:
2869: put($namespace,$storehash,$udomain,$uname) : stores hash in namesp
2870: ($udomain and $uname are optional)
2871:
2872: =item *
2873:
2874: cput($namespace,$storehash,$udomain,$uname) : critical put
2875: ($udomain and $uname are optional)
2876:
2877: =item *
2878:
2879: eget($namespace,$storearr,$udomain,$uname) : returns hash with keys from array
2880: reference filled in from namesp (encrypts the return communication)
2881: ($udomain and $uname are optional)
2882:
2883: =item *
2884:
2885: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
2886: actions
2887: F: full access
2888: U,I,K: authentication modes (cxx only)
2889: '': forbidden
2890: 1: user needs to choose course
2891: 2: browse allowed
2892:
2893: =item *
2894:
2895: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
2896: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
2897: and course level
2898:
2899: =item *
2900:
2901: metadata_query($query,$custom,$customshow) : make a metadata query against the
2902: network of library servers; returns file handle of where SQL and regex results
2903: will be stored for query
2904:
2905: =item *
2906:
2907: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
2908: explanation of a user role term
2909:
2910: =item *
2911:
2912: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
2913: user for the level given by URL. Optional start and end dates (leave empty
2914: string or zero for "no date")
2915:
2916: =item *
2917:
2918: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
2919:
2920: =item *
2921:
2922: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
2923: modify user
2924:
2925: =item *
2926:
2927: modifystudent($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2928: $end,$start) : modify student
2929:
2930: =item *
2931:
2932: writecoursepref($courseid,%prefs) : write preferences for a course
2933:
2934: =item *
2935:
2936: createcourse($udom,$description,$url) : make/modify course
2937:
2938: =item *
2939:
2940: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
2941: custom role; give a custom role to a user for the level given by URL. Specify
2942: name and domain of role author, and role name
2943:
2944: =item *
2945:
2946: revokerole($udom,$uname,$url,$role) : revoke a role for url
2947:
2948: =item *
2949:
2950: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
2951:
2952: =item *
2953:
2954: dirlist($uri) : return directory list based on URI
2955:
2956: =item *
2957:
2958: directcondval($number) : get current value of a condition; reads from a state
2959: string
2960:
2961: =item *
2962:
2963: condval($condidx) : value of condition index based on state
2964:
2965: =item *
2966:
2967: EXT($varname,$symbparm) : value of a variable
2968:
2969: =item *
2970:
2971: metadata($uri,$what,$liburi,$prefix,$depthcount) : get metadata; returns the
2972: metadata entry for a file; entry='keys', returns a comma separated list of keys
2973:
2974: =item *
2975:
2976: symblist($mapname,%newhash) : update symbolic storage links
2977:
2978: =item *
2979:
2980: symbread($filename) : return symbolic list entry (filename argument optional);
2981: returns the data handle
2982:
2983: =item *
2984:
2985: numval($salt) : return random seed value (addend for rndseed)
2986:
2987: =item *
2988:
2989: rndseed($symb,$courseid,$domain,$username) : create a random sum; returns
2990: a random seed, all arguments are optional, if they aren't sent it uses the
2991: environment to derive them. Note: if symb isn't sent and it can't get one
2992: from &symbread it will use the current time as its return value
2993:
2994: =item *
2995:
2996: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
2997: unfakeable, receipt
2998:
2999: =item *
3000:
3001: receipt() : API to ireceipt working off of ENV values; given out to users
3002:
3003: =item *
3004:
3005: getfile($file) : serves up a file, returns the contents of a file or -1;
3006: replicates and subscribes to the file
3007:
3008: =item *
3009:
3010: filelocation($dir,$file) : returns file system location of a file based on URI;
3011: meant to be "fairly clean" absolute reference
3012:
3013: =item *
3014:
3015: hreflocation($dir,$file) : returns file system location or a URL; same as
3016: filelocation except for hrefs
3017:
3018: =item *
3019:
3020: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
3021:
3022: =item *
3023:
3024: escape() : unpack non-word characters into CGI-compatible hex codes
3025:
3026: =item *
3027:
3028: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
3029:
3030: =item *
3031:
3032: goodbye() : flush course logs and log shutting down; it is called in srm.conf
3033: as a PerlChildExitHandler
3034:
3035: =back
3036:
3037: =cut
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