1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.192 2001/12/21 17:02:35 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 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,$uname)=@_;
1278: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1279: if (!$uname) { $uname=$ENV{'user.name'}; }
1280: my $uhome=&homeserver($uname,$udomain);
1281: my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
1282: my @pairs=split(/\&/,$rep);
1283: my %returnhash=();
1284: foreach (@pairs) {
1285: my ($key,$value)=split(/=/,$_);
1286: $returnhash{unescape($key)}=unescape($value);
1287: }
1288: return %returnhash;
1289: }
1290:
1291: # --------------------------------------------------------------- put interface
1292:
1293: sub put {
1294: my ($namespace,$storehash,$udomain,$uname)=@_;
1295: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1296: if (!$uname) { $uname=$ENV{'user.name'}; }
1297: my $uhome=&homeserver($uname,$udomain);
1298: my $items='';
1299: foreach (keys %$storehash) {
1300: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1301: }
1302: $items=~s/\&$//;
1303: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1304: }
1305:
1306: # ------------------------------------------------------ critical put interface
1307:
1308: sub cput {
1309: my ($namespace,$storehash,$udomain,$uname)=@_;
1310: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1311: if (!$uname) { $uname=$ENV{'user.name'}; }
1312: my $uhome=&homeserver($uname,$udomain);
1313: my $items='';
1314: foreach (keys %$storehash) {
1315: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1316: }
1317: $items=~s/\&$//;
1318: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1319: }
1320:
1321: # -------------------------------------------------------------- eget interface
1322:
1323: sub eget {
1324: my ($namespace,$storearr,$udomain,$uname)=@_;
1325: my $items='';
1326: foreach (@$storearr) {
1327: $items.=escape($_).'&';
1328: }
1329: $items=~s/\&$//;
1330: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1331: if (!$uname) { $uname=$ENV{'user.name'}; }
1332: my $uhome=&homeserver($uname,$udomain);
1333: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1334: my @pairs=split(/\&/,$rep);
1335: my %returnhash=();
1336: my $i=0;
1337: foreach (@$storearr) {
1338: $returnhash{$_}=unescape($pairs[$i]);
1339: $i++;
1340: }
1341: return %returnhash;
1342: }
1343:
1344: # ------------------------------------------------- Check for a user privilege
1345:
1346: sub allowed {
1347: my ($priv,$uri)=@_;
1348:
1349: my $orguri=$uri;
1350: $uri=&declutter($uri);
1351:
1352: # Free bre access to adm and meta resources
1353:
1354: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1355: return 'F';
1356: }
1357:
1358: # Free bre to public access
1359:
1360: if ($priv eq 'bre') {
1361: if (&metadata($uri,'copyright') eq 'public') { return 'F'; }
1362: }
1363:
1364: my $thisallowed='';
1365: my $statecond=0;
1366: my $courseprivid='';
1367:
1368: # Course
1369:
1370: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1371: $thisallowed.=$1;
1372: }
1373:
1374: # Domain
1375:
1376: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1377: =~/$priv\&([^\:]*)/) {
1378: $thisallowed.=$1;
1379: }
1380:
1381: # Course: uri itself is a course
1382: my $courseuri=$uri;
1383: $courseuri=~s/\_(\d)/\/$1/;
1384: $courseuri=~s/^([^\/])/\/$1/;
1385:
1386: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1387: =~/$priv\&([^\:]*)/) {
1388: $thisallowed.=$1;
1389: }
1390:
1391: # Full access at system, domain or course-wide level? Exit.
1392:
1393: if ($thisallowed=~/F/) {
1394: return 'F';
1395: }
1396:
1397: # If this is generating or modifying users, exit with special codes
1398:
1399: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1400: return $thisallowed;
1401: }
1402: #
1403: # Gathered so far: system, domain and course wide privileges
1404: #
1405: # Course: See if uri or referer is an individual resource that is part of
1406: # the course
1407:
1408: if ($ENV{'request.course.id'}) {
1409: $courseprivid=$ENV{'request.course.id'};
1410: if ($ENV{'request.course.sec'}) {
1411: $courseprivid.='/'.$ENV{'request.course.sec'};
1412: }
1413: $courseprivid=~s/\_/\//;
1414: my $checkreferer=1;
1415: my @uriparts=split(/\//,$uri);
1416: my $filename=$uriparts[$#uriparts];
1417: my $pathname=$uri;
1418: $pathname=~s/\/$filename$//;
1419: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1420: /\&$filename\:([\d\|]+)\&/) {
1421: $statecond=$1;
1422: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1423: =~/$priv\&([^\:]*)/) {
1424: $thisallowed.=$1;
1425: $checkreferer=0;
1426: }
1427: }
1428:
1429: if ($checkreferer) {
1430: my $refuri=$ENV{'httpref.'.$orguri};
1431:
1432: unless ($refuri) {
1433: foreach (keys %ENV) {
1434: if ($_=~/^httpref\..*\*/) {
1435: my $pattern=$_;
1436: $pattern=~s/^httpref\.\/res\///;
1437: $pattern=~s/\*/\[\^\/\]\+/g;
1438: $pattern=~s/\//\\\//g;
1439: if ($orguri=~/$pattern/) {
1440: $refuri=$ENV{$_};
1441: }
1442: }
1443: }
1444: }
1445: if ($refuri) {
1446: $refuri=&declutter($refuri);
1447: my @uriparts=split(/\//,$refuri);
1448: my $filename=$uriparts[$#uriparts];
1449: my $pathname=$refuri;
1450: $pathname=~s/\/$filename$//;
1451: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1452: /\&$filename\:([\d\|]+)\&/) {
1453: my $refstatecond=$1;
1454: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1455: =~/$priv\&([^\:]*)/) {
1456: $thisallowed.=$1;
1457: $uri=$refuri;
1458: $statecond=$refstatecond;
1459: }
1460: }
1461: }
1462: }
1463: }
1464:
1465: #
1466: # Gathered now: all privileges that could apply, and condition number
1467: #
1468: #
1469: # Full or no access?
1470: #
1471:
1472: if ($thisallowed=~/F/) {
1473: return 'F';
1474: }
1475:
1476: unless ($thisallowed) {
1477: return '';
1478: }
1479:
1480: # Restrictions exist, deal with them
1481: #
1482: # C:according to course preferences
1483: # R:according to resource settings
1484: # L:unless locked
1485: # X:according to user session state
1486: #
1487:
1488: # Possibly locked functionality, check all courses
1489: # Locks might take effect only after 10 minutes cache expiration for other
1490: # courses, and 2 minutes for current course
1491:
1492: my $envkey;
1493: if ($thisallowed=~/L/) {
1494: foreach $envkey (keys %ENV) {
1495: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1496: my $courseid=$2;
1497: my $roleid=$1.'.'.$2;
1498: $courseid=~s/^\///;
1499: my $expiretime=600;
1500: if ($ENV{'request.role'} eq $roleid) {
1501: $expiretime=120;
1502: }
1503: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1504: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1505: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1506: &coursedescription($courseid);
1507: }
1508: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1509: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1510: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1511: &log($ENV{'user.domain'},$ENV{'user.name'},
1512: $ENV{'user.host'},
1513: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1514: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1515: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1516: return '';
1517: }
1518: }
1519: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1520: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1521: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1522: &log($ENV{'user.domain'},$ENV{'user.name'},
1523: $ENV{'user.host'},
1524: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1525: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1526: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1527: return '';
1528: }
1529: }
1530: }
1531: }
1532: }
1533:
1534: #
1535: # Rest of the restrictions depend on selected course
1536: #
1537:
1538: unless ($ENV{'request.course.id'}) {
1539: return '1';
1540: }
1541:
1542: #
1543: # Now user is definitely in a course
1544: #
1545:
1546:
1547: # Course preferences
1548:
1549: if ($thisallowed=~/C/) {
1550: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1551: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1552: =~/\,$rolecode\,/) {
1553: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1554: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1555: $ENV{'request.course.id'});
1556: return '';
1557: }
1558: }
1559:
1560: # Resource preferences
1561:
1562: if ($thisallowed=~/R/) {
1563: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1564: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1565: if (-e $filename) {
1566: my @content;
1567: {
1568: my $fh=Apache::File->new($filename);
1569: @content=<$fh>;
1570: }
1571: if (join('',@content)=~
1572: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1573: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1574: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1575: return '';
1576:
1577: }
1578: }
1579: }
1580:
1581: # Restricted by state?
1582:
1583: if ($thisallowed=~/X/) {
1584: if (&condval($statecond)) {
1585: return '2';
1586: } else {
1587: return '';
1588: }
1589: }
1590:
1591: return 'F';
1592: }
1593:
1594: # ----------------------------------------------------------------- Define Role
1595:
1596: sub definerole {
1597: if (allowed('mcr','/')) {
1598: my ($rolename,$sysrole,$domrole,$courole)=@_;
1599: foreach (split('/',$sysrole)) {
1600: my ($crole,$cqual)=split(/\&/,$_);
1601: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1602: if ($pr{'cr:s'}=~/$crole\&/) {
1603: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1604: return "refused:s:$crole&$cqual";
1605: }
1606: }
1607: }
1608: foreach (split('/',$domrole)) {
1609: my ($crole,$cqual)=split(/\&/,$_);
1610: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1611: if ($pr{'cr:d'}=~/$crole\&/) {
1612: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1613: return "refused:d:$crole&$cqual";
1614: }
1615: }
1616: }
1617: foreach (split('/',$courole)) {
1618: my ($crole,$cqual)=split(/\&/,$_);
1619: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1620: if ($pr{'cr:c'}=~/$crole\&/) {
1621: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1622: return "refused:c:$crole&$cqual";
1623: }
1624: }
1625: }
1626: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1627: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1628: "rolesdef_$rolename=".
1629: escape($sysrole.'_'.$domrole.'_'.$courole);
1630: return reply($command,$ENV{'user.home'});
1631: } else {
1632: return 'refused';
1633: }
1634: }
1635:
1636: # ---------------- Make a metadata query against the network of library servers
1637:
1638: sub metadata_query {
1639: my ($query,$custom,$customshow)=@_;
1640: my %rhash;
1641: for my $server (keys %libserv) {
1642: unless ($custom or $customshow) {
1643: my $reply=&reply("querysend:".&escape($query),$server);
1644: $rhash{$server}=$reply;
1645: }
1646: else {
1647: my $reply=&reply("querysend:".&escape($query).':'.
1648: &escape($custom).':'.&escape($customshow),
1649: $server);
1650: $rhash{$server}=$reply;
1651: }
1652: }
1653: return \%rhash;
1654: }
1655:
1656: # ------------------------------------------------------------------ Plain Text
1657:
1658: sub plaintext {
1659: my $short=shift;
1660: return $prp{$short};
1661: }
1662:
1663: # ----------------------------------------------------------------- Assign Role
1664:
1665: sub assignrole {
1666: my ($udom,$uname,$url,$role,$end,$start)=@_;
1667: my $mrole;
1668: if ($role =~ /^cr\//) {
1669: unless (&allowed('ccr',$url)) {
1670: &logthis('Refused custom assignrole: '.
1671: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1672: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1673: return 'refused';
1674: }
1675: $mrole='cr';
1676: } else {
1677: my $cwosec=$url;
1678: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1679: unless (&allowed('c'.$role,$cwosec)) {
1680: &logthis('Refused assignrole: '.
1681: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1682: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1683: return 'refused';
1684: }
1685: $mrole=$role;
1686: }
1687: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1688: "$udom:$uname:$url".'_'."$mrole=$role";
1689: if ($end) { $command.='_'.$end; }
1690: if ($start) {
1691: if ($end) {
1692: $command.='_'.$start;
1693: } else {
1694: $command.='_0_'.$start;
1695: }
1696: }
1697: return &reply($command,&homeserver($uname,$udom));
1698: }
1699:
1700: # -------------------------------------------------- Modify user authentication
1701: sub modifyuserauth {
1702: my ($udom,$uname,$umode,$upass)=@_;
1703: my $uhome=&homeserver($uname,$udom);
1704: &logthis('Call to modify user authentication'.$udom.', '.$uname.', '.
1705: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1706: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
1707: &escape($upass),$uhome);
1708: unless ($reply eq 'ok') {
1709: return 'error: '.$reply;
1710: }
1711: return 'ok';
1712: }
1713:
1714: # --------------------------------------------------------------- Modify a user
1715:
1716:
1717: sub modifyuser {
1718: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1719: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1720: $umode.', '.$first.', '.$middle.', '.
1721: $last.', '.$gene.' by '.
1722: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1723: my $uhome=&homeserver($uname,$udom);
1724: # ----------------------------------------------------------------- Create User
1725: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1726: my $unhome='';
1727: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1728: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1729: } else {
1730: my $tryserver;
1731: my $loadm=10000000;
1732: foreach $tryserver (keys %libserv) {
1733: if ($hostdom{$tryserver} eq $udom) {
1734: my $answer=reply('load',$tryserver);
1735: if (($answer=~/\d+/) && ($answer<$loadm)) {
1736: $loadm=$answer;
1737: $unhome=$tryserver;
1738: }
1739: }
1740: }
1741: }
1742: if (($unhome eq '') || ($unhome eq 'no_host')) {
1743: return 'error: find home';
1744: }
1745: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1746: &escape($upass),$unhome);
1747: unless ($reply eq 'ok') {
1748: return 'error: '.$reply;
1749: }
1750: $uhome=&homeserver($uname,$udom);
1751: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1752: return 'error: verify home';
1753: }
1754: }
1755: # ---------------------------------------------------------------------- Add ID
1756: if ($uid) {
1757: $uid=~tr/A-Z/a-z/;
1758: my %uidhash=&idrget($udom,$uname);
1759: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1760: unless ($uid eq $uidhash{$uname}) {
1761: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1762: }
1763: } else {
1764: &idput($udom,($uname => $uid));
1765: }
1766: }
1767: # -------------------------------------------------------------- Add names, etc
1768: my %names=&get('environment',
1769: ['firstname','middlename','lastname','generation'],
1770: $udom,$uname);
1771: if ($first) { $names{'firstname'} = $first; }
1772: if ($middle) { $names{'middlename'} = $middle; }
1773: if ($last) { $names{'lastname'} = $last; }
1774: if ($gene) { $names{'generation'} = $gene; }
1775: my $reply = &put('environment', \%names, $udom,$uname);
1776: if ($reply ne 'ok') { return 'error: '.$reply; }
1777: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1778: $umode.', '.$first.', '.$middle.', '.
1779: $last.', '.$gene.' by '.
1780: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1781: return 'ok';
1782: }
1783:
1784: # -------------------------------------------------------------- Modify student
1785:
1786: sub modifystudent {
1787: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1788: $end,$start)=@_;
1789: my $cid='';
1790: unless ($cid=$ENV{'request.course.id'}) {
1791: return 'not_in_class';
1792: }
1793: # --------------------------------------------------------------- Make the user
1794: my $reply=&modifyuser
1795: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1796: unless ($reply eq 'ok') { return $reply; }
1797: my $uhome=&homeserver($uname,$udom);
1798: if (($uhome eq '') || ($uhome eq 'no_host')) {
1799: return 'error: no such user';
1800: }
1801: # -------------------------------------------------- Add student to course list
1802: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1803: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1804: &escape($uname.':'.$udom).'='.
1805: &escape($end.':'.$start),
1806: $ENV{'course.'.$cid.'.home'});
1807: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1808: return 'error: '.$reply;
1809: }
1810: # ---------------------------------------------------- Add student role to user
1811: my $uurl='/'.$cid;
1812: $uurl=~s/\_/\//g;
1813: if ($usec) {
1814: $uurl.='/'.$usec;
1815: }
1816: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1817: }
1818:
1819: # ------------------------------------------------- Write to course preferences
1820:
1821: sub writecoursepref {
1822: my ($courseid,%prefs)=@_;
1823: $courseid=~s/^\///;
1824: $courseid=~s/\_/\//g;
1825: my ($cdomain,$cnum)=split(/\//,$courseid);
1826: my $chome=homeserver($cnum,$cdomain);
1827: if (($chome eq '') || ($chome eq 'no_host')) {
1828: return 'error: no such course';
1829: }
1830: my $cstring='';
1831: foreach (keys %prefs) {
1832: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1833: }
1834: $cstring=~s/\&$//;
1835: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1836: }
1837:
1838: # ---------------------------------------------------------- Make/modify course
1839:
1840: sub createcourse {
1841: my ($udom,$description,$url)=@_;
1842: $url=&declutter($url);
1843: my $cid='';
1844: unless (&allowed('ccc',$ENV{'user.domain'})) {
1845: return 'refused';
1846: }
1847: unless ($udom eq $ENV{'user.domain'}) {
1848: return 'refused';
1849: }
1850: # ------------------------------------------------------------------- Create ID
1851: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1852: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1853: # ----------------------------------------------- Make sure that does not exist
1854: my $uhome=&homeserver($uname,$udom);
1855: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1856: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1857: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1858: $uhome=&homeserver($uname,$udom);
1859: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1860: return 'error: unable to generate unique course-ID';
1861: }
1862: }
1863: # ------------------------------------------------------------- Make the course
1864: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1865: $ENV{'user.home'});
1866: unless ($reply eq 'ok') { return 'error: '.$reply; }
1867: $uhome=&homeserver($uname,$udom);
1868: if (($uhome eq '') || ($uhome eq 'no_host')) {
1869: return 'error: no such course';
1870: }
1871: &writecoursepref($udom.'_'.$uname,
1872: ('description' => $description,
1873: 'url' => $url));
1874: return '/'.$udom.'/'.$uname;
1875: }
1876:
1877: # ---------------------------------------------------------- Assign Custom Role
1878:
1879: sub assigncustomrole {
1880: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1881: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1882: $end,$start);
1883: }
1884:
1885: # ----------------------------------------------------------------- Revoke Role
1886:
1887: sub revokerole {
1888: my ($udom,$uname,$url,$role)=@_;
1889: my $now=time;
1890: return &assignrole($udom,$uname,$url,$role,$now);
1891: }
1892:
1893: # ---------------------------------------------------------- Revoke Custom Role
1894:
1895: sub revokecustomrole {
1896: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1897: my $now=time;
1898: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1899: }
1900:
1901: # ------------------------------------------------------------ Directory lister
1902:
1903: sub dirlist {
1904: my $uri=shift;
1905: $uri=~s/^\///;
1906: $uri=~s/\/$//;
1907: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1908: if ($udom) {
1909: if ($uname) {
1910: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1911: homeserver($uname,$udom));
1912: return split(/:/,$listing);
1913: } else {
1914: my $tryserver;
1915: my %allusers=();
1916: foreach $tryserver (keys %libserv) {
1917: if ($hostdom{$tryserver} eq $udom) {
1918: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1919: $tryserver);
1920: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1921: && ($listing ne 'con_lost')) {
1922: foreach (split(/:/,$listing)) {
1923: my ($entry,@stat)=split(/&/,$_);
1924: $allusers{$entry}=1;
1925: }
1926: }
1927: }
1928: }
1929: my $alluserstr='';
1930: foreach (sort keys %allusers) {
1931: $alluserstr.=$_.'&user:';
1932: }
1933: $alluserstr=~s/:$//;
1934: return split(/:/,$alluserstr);
1935: }
1936: } else {
1937: my $tryserver;
1938: my %alldom=();
1939: foreach $tryserver (keys %libserv) {
1940: $alldom{$hostdom{$tryserver}}=1;
1941: }
1942: my $alldomstr='';
1943: foreach (sort keys %alldom) {
1944: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1945: }
1946: $alldomstr=~s/:$//;
1947: return split(/:/,$alldomstr);
1948: }
1949: }
1950:
1951: # -------------------------------------------------------- Value of a Condition
1952:
1953: sub directcondval {
1954: my $number=shift;
1955: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1956: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1957: } else {
1958: return 2;
1959: }
1960: }
1961:
1962: sub condval {
1963: my $condidx=shift;
1964: my $result=0;
1965: my $allpathcond='';
1966: foreach (split(/\|/,$condidx)) {
1967: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1968: $allpathcond.=
1969: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1970: }
1971: }
1972: $allpathcond=~s/\|$//;
1973: if ($ENV{'request.course.id'}) {
1974: if ($allpathcond) {
1975: my $operand='|';
1976: my @stack;
1977: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
1978: if ($_ eq '(') {
1979: push @stack,($operand,$result)
1980: } elsif ($_ eq ')') {
1981: my $before=pop @stack;
1982: if (pop @stack eq '&') {
1983: $result=$result>$before?$before:$result;
1984: } else {
1985: $result=$result>$before?$result:$before;
1986: }
1987: } elsif (($_ eq '&') || ($_ eq '|')) {
1988: $operand=$_;
1989: } else {
1990: my $new=directcondval($_);
1991: if ($operand eq '&') {
1992: $result=$result>$new?$new:$result;
1993: } else {
1994: $result=$result>$new?$result:$new;
1995: }
1996: }
1997: }
1998: }
1999: }
2000: return $result;
2001: }
2002:
2003: # --------------------------------------------------------- Value of a Variable
2004:
2005: sub EXT {
2006: my ($varname,$symbparm)=@_;
2007: unless ($varname) { return ''; }
2008: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2009: my $rest;
2010: if ($therest[0]) {
2011: $rest=join('.',@therest);
2012: } else {
2013: $rest='';
2014: }
2015: my $qualifierrest=$qualifier;
2016: if ($rest) { $qualifierrest.='.'.$rest; }
2017: my $spacequalifierrest=$space;
2018: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2019: if ($realm eq 'user') {
2020: # --------------------------------------------------------------- user.resource
2021: if ($space eq 'resource') {
2022: my %restored=&restore();
2023: return $restored{$qualifierrest};
2024: # ----------------------------------------------------------------- user.access
2025: } elsif ($space eq 'access') {
2026: return &allowed($qualifier,$rest);
2027: # ------------------------------------------ user.preferences, user.environment
2028: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2029: return $ENV{join('.',('environment',$qualifierrest))};
2030: # ----------------------------------------------------------------- user.course
2031: } elsif ($space eq 'course') {
2032: return $ENV{join('.',('request.course',$qualifier))};
2033: # ------------------------------------------------------------------- user.role
2034: } elsif ($space eq 'role') {
2035: my ($role,$where)=split(/\./,$ENV{'request.role'});
2036: if ($qualifier eq 'value') {
2037: return $role;
2038: } elsif ($qualifier eq 'extent') {
2039: return $where;
2040: }
2041: # ----------------------------------------------------------------- user.domain
2042: } elsif ($space eq 'domain') {
2043: return $ENV{'user.domain'};
2044: # ------------------------------------------------------------------- user.name
2045: } elsif ($space eq 'name') {
2046: return $ENV{'user.name'};
2047: # ---------------------------------------------------- Any other user namespace
2048: } else {
2049: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2050: my %reply=&get($space,[$item]);
2051: return $reply{$item};
2052: }
2053: } elsif ($realm eq 'request') {
2054: # ------------------------------------------------------------- request.browser
2055: if ($space eq 'browser') {
2056: return $ENV{'browser.'.$qualifier};
2057: # ------------------------------------------------------------ request.filename
2058: } else {
2059: return $ENV{'request.'.$spacequalifierrest};
2060: }
2061: } elsif ($realm eq 'course') {
2062: # ---------------------------------------------------------- course.description
2063: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
2064: $spacequalifierrest};
2065: } elsif ($realm eq 'resource') {
2066: if ($ENV{'request.course.id'}) {
2067:
2068: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2069:
2070:
2071: # ----------------------------------------------------- Cascading lookup scheme
2072: my $symbp;
2073: if ($symbparm) {
2074: $symbp=$symbparm;
2075: } else {
2076: $symbp=&symbread();
2077: }
2078: my $mapp=(split(/\_\_\_/,$symbp))[0];
2079:
2080: my $symbparm=$symbp.'.'.$spacequalifierrest;
2081: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2082:
2083: my $seclevel=
2084: $ENV{'request.course.id'}.'.['.
2085: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
2086: my $seclevelr=
2087: $ENV{'request.course.id'}.'.['.
2088: $ENV{'request.course.sec'}.'].'.$symbparm;
2089: my $seclevelm=
2090: $ENV{'request.course.id'}.'.['.
2091: $ENV{'request.course.sec'}.'].'.$mapparm;
2092:
2093: my $courselevel=
2094: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
2095: my $courselevelr=
2096: $ENV{'request.course.id'}.'.'.$symbparm;
2097: my $courselevelm=
2098: $ENV{'request.course.id'}.'.'.$mapparm;
2099:
2100: # ----------------------------------------------------------- first, check user
2101: my %resourcedata=get('resourcedata',
2102: [$courselevelr,$courselevelm,$courselevel]);
2103: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2104: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2105:
2106: if ($resourcedata{$courselevelr}) {
2107: return $resourcedata{$courselevelr}; }
2108: if ($resourcedata{$courselevelm}) {
2109: return $resourcedata{$courselevelm}; }
2110: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
2111:
2112: } else {
2113: if ($resourcedata{$courselevelr}!~/No such file/) {
2114: &logthis("<font color=blue>WARNING:".
2115: " Trying to get resource data for ".$ENV{'user.name'}." at "
2116: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
2117: "</font>");
2118: }
2119: }
2120:
2121: # -------------------------------------------------------- second, check course
2122:
2123: my $reply=&reply('get:'.
2124: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
2125: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2126: ':resourcedata:'.
2127: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
2128: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
2129: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
2130: if ($reply!~/^error\:/) {
2131: foreach (split(/\&/,$reply)) {
2132: if ($_) { return &unescape($_); }
2133: }
2134: }
2135: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
2136: &logthis("<font color=blue>WARNING:".
2137: " Getting ".$reply." asking for ".$varname." for ".
2138: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2139: ' at '.
2140: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
2141: ' from '.
2142: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
2143: "</font>");
2144: }
2145: # ------------------------------------------------------ third, check map parms
2146: my %parmhash=();
2147: my $thisparm='';
2148: if (tie(%parmhash,'GDBM_File',
2149: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
2150: $thisparm=$parmhash{$symbparm};
2151: untie(%parmhash);
2152: }
2153: if ($thisparm) { return $thisparm; }
2154: }
2155:
2156: # --------------------------------------------- last, look in resource metadata
2157:
2158: $spacequalifierrest=~s/\./\_/;
2159: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2160: if ($metadata) { return $metadata; }
2161: $metadata=&metadata($ENV{'request.filename'},
2162: 'parameter_'.$spacequalifierrest);
2163: if ($metadata) { return $metadata; }
2164:
2165: # ------------------------------------------------------------------ Cascade up
2166:
2167: unless ($space eq '0') {
2168: my ($part,$id)=split(/\_/,$space);
2169: if ($id) {
2170: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2171: $symbparm);
2172: if ($partgeneral) { return $partgeneral; }
2173: } else {
2174: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2175: $symbparm);
2176: if ($resourcegeneral) { return $resourcegeneral; }
2177: }
2178: }
2179:
2180: # ---------------------------------------------------- Any other user namespace
2181: } elsif ($realm eq 'environment') {
2182: # ----------------------------------------------------------------- environment
2183: return $ENV{'environment.'.$spacequalifierrest};
2184: } elsif ($realm eq 'system') {
2185: # ----------------------------------------------------------------- system.time
2186: if ($space eq 'time') {
2187: return time;
2188: }
2189: }
2190: return '';
2191: }
2192:
2193: # ---------------------------------------------------------------- Get metadata
2194:
2195: sub metadata {
2196: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2197:
2198: $uri=&declutter($uri);
2199: my $filename=$uri;
2200: $uri=~s/\.meta$//;
2201: #
2202: # Is the metadata already cached?
2203: # Look at timestamp of caching
2204: # Everything is cached by the main uri, libraries are never directly cached
2205: #
2206: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2207: #
2208: # Is this a recursive call for a library?
2209: #
2210: if ($liburi) {
2211: $liburi=&declutter($liburi);
2212: $filename=$liburi;
2213: }
2214: my %metathesekeys=();
2215: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2216: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2217: my $parser=HTML::TokeParser->new(\$metastring);
2218: my $token;
2219: undef %metathesekeys;
2220: while ($token=$parser->get_token) {
2221: if ($token->[0] eq 'S') {
2222: if (defined($token->[2]->{'package'})) {
2223: #
2224: # This is a package - get package info
2225: #
2226: my $package=$token->[2]->{'package'};
2227: my $keyroot='';
2228: if ($prefix) {
2229: $keyroot.='_'.$prefix;
2230: } else {
2231: if (defined($token->[2]->{'part'})) {
2232: $keyroot.='_'.$token->[2]->{'part'};
2233: }
2234: }
2235: if (defined($token->[2]->{'id'})) {
2236: $keyroot.='_'.$token->[2]->{'id'};
2237: }
2238: if ($metacache{$uri.':packages'}) {
2239: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2240: } else {
2241: $metacache{$uri.':packages'}=$package.$keyroot;
2242: }
2243: foreach (keys %packagetab) {
2244: if ($_=~/^$package\&/) {
2245: my ($pack,$name,$subp)=split(/\&/,$_);
2246: my $value=$packagetab{$_};
2247: my $part=$keyroot;
2248: $part=~s/^\_//;
2249: if ($subp eq 'display') {
2250: $value.=' [Part: '.$part.']';
2251: }
2252: my $unikey='parameter'.$keyroot.'_'.$name;
2253: $metathesekeys{$unikey}=1;
2254: $metacache{$uri.':'.$unikey.'.part'}=$part;
2255: unless
2256: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2257: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2258: }
2259: }
2260: }
2261: } else {
2262: #
2263: # This is not a package - some other kind of start tag
2264: #
2265: my $entry=$token->[1];
2266: my $unikey;
2267: if ($entry eq 'import') {
2268: $unikey='';
2269: } else {
2270: $unikey=$entry;
2271: }
2272: if ($prefix) {
2273: $unikey.=$prefix;
2274: } else {
2275: if (defined($token->[2]->{'part'})) {
2276: $unikey.='_'.$token->[2]->{'part'};
2277: }
2278: }
2279: if (defined($token->[2]->{'id'})) {
2280: $unikey.='_'.$token->[2]->{'id'};
2281: }
2282:
2283: if ($entry eq 'import') {
2284: #
2285: # Importing a library here
2286: #
2287: if (defined($depthcount)) { $depthcount++; } else
2288: { $depthcount=0; }
2289: if ($depthcount<20) {
2290: foreach (split(/\,/,&metadata($uri,'keys',
2291: $parser->get_text('/import'),$unikey,
2292: $depthcount))) {
2293: $metathesekeys{$_}=1;
2294: }
2295: }
2296: } else {
2297:
2298: if (defined($token->[2]->{'name'})) {
2299: $unikey.='_'.$token->[2]->{'name'};
2300: }
2301: $metathesekeys{$unikey}=1;
2302: foreach (@{$token->[3]}) {
2303: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2304: }
2305: unless (
2306: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
2307: ) { $metacache{$uri.':'.$unikey}=
2308: $metacache{$uri.':'.$unikey.'.default'};
2309: }
2310: # end of not-a-package not-a-library import
2311: }
2312: # end of not-a-package start tag
2313: }
2314: # the next is the end of "start tag"
2315: }
2316: }
2317: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2318: $metacache{$uri.':cachedtimestamp'}=time;
2319: # this is the end of "was not already recently cached
2320: }
2321: return $metacache{$uri.':'.$what};
2322: }
2323:
2324: # ------------------------------------------------- Update symbolic store links
2325:
2326: sub symblist {
2327: my ($mapname,%newhash)=@_;
2328: $mapname=declutter($mapname);
2329: my %hash;
2330: if (($ENV{'request.course.fn'}) && (%newhash)) {
2331: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2332: &GDBM_WRCREAT,0640)) {
2333: foreach (keys %newhash) {
2334: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2335: }
2336: if (untie(%hash)) {
2337: return 'ok';
2338: }
2339: }
2340: }
2341: return 'error';
2342: }
2343:
2344: # ------------------------------------------------------ Return symb list entry
2345:
2346: sub symbread {
2347: my $thisfn=shift;
2348: unless ($thisfn) {
2349: if ($ENV{'request.symb'}) { return $ENV{'request.symb'}; }
2350: $thisfn=$ENV{'request.filename'};
2351: }
2352: $thisfn=declutter($thisfn);
2353: my %hash;
2354: my %bighash;
2355: my $syval='';
2356: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2357: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2358: &GDBM_READER,0640)) {
2359: $syval=$hash{$thisfn};
2360: untie(%hash);
2361: }
2362: # ---------------------------------------------------------- There was an entry
2363: if ($syval) {
2364: unless ($syval=~/\_\d+$/) {
2365: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2366: &appenv('request.ambiguous' => $thisfn);
2367: return '';
2368: }
2369: $syval.=$1;
2370: }
2371: } else {
2372: # ------------------------------------------------------- Was not in symb table
2373: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2374: &GDBM_READER,0640)) {
2375: # ---------------------------------------------- Get ID(s) for current resource
2376: my $ids=$bighash{'ids_/res/'.$thisfn};
2377: unless ($ids) {
2378: $ids=$bighash{'ids_/'.$thisfn};
2379: }
2380: if ($ids) {
2381: # ------------------------------------------------------------------- Has ID(s)
2382: my @possibilities=split(/\,/,$ids);
2383: if ($#possibilities==0) {
2384: # ----------------------------------------------- There is only one possibility
2385: my ($mapid,$resid)=split(/\./,$ids);
2386: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2387: } else {
2388: # ------------------------------------------ There is more than one possibility
2389: my $realpossible=0;
2390: foreach (@possibilities) {
2391: my $file=$bighash{'src_'.$_};
2392: if (&allowed('bre',$file)) {
2393: my ($mapid,$resid)=split(/\./,$_);
2394: if ($bighash{'map_type_'.$mapid} ne 'page') {
2395: $realpossible++;
2396: $syval=declutter($bighash{'map_id_'.$mapid}).
2397: '___'.$resid;
2398: }
2399: }
2400: }
2401: if ($realpossible!=1) { $syval=''; }
2402: }
2403: }
2404: untie(%bighash)
2405: }
2406: }
2407: if ($syval) {
2408: return $syval.'___'.$thisfn;
2409: }
2410: }
2411: &appenv('request.ambiguous' => $thisfn);
2412: return '';
2413: }
2414:
2415: # ---------------------------------------------------------- Return random seed
2416:
2417: sub numval {
2418: my $txt=shift;
2419: $txt=~tr/A-J/0-9/;
2420: $txt=~tr/a-j/0-9/;
2421: $txt=~tr/K-T/0-9/;
2422: $txt=~tr/k-t/0-9/;
2423: $txt=~tr/U-Z/0-5/;
2424: $txt=~tr/u-z/0-5/;
2425: $txt=~s/\D//g;
2426: return int($txt);
2427: }
2428:
2429: sub rndseed {
2430: my ($symb,$courseid,$domain,$username)=@_;
2431: if (!$symb) {
2432: unless ($symb=&symbread()) { return time; }
2433: }
2434: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2435: if (!$domain) {$domain=$ENV{'user.domain'};}
2436: if (!$username) {$username=$ENV{'user.name'};}
2437: {
2438: use integer;
2439: my $symbchck=unpack("%32C*",$symb) << 27;
2440: my $symbseed=numval($symb) << 22;
2441: my $namechck=unpack("%32C*",$username) << 17;
2442: my $nameseed=numval($username) << 12;
2443: my $domainseed=unpack("%32C*",$domain) << 7;
2444: my $courseseed=unpack("%32C*",$courseid);
2445: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2446: #uncommenting these lines can break things!
2447: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2448: #&Apache::lonxml::debug("rndseed :$num:$symb");
2449: return $num;
2450: }
2451: }
2452:
2453: sub ireceipt {
2454: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2455: my $cuname=unpack("%32C*",$funame);
2456: my $cudom=unpack("%32C*",$fudom);
2457: my $cucourseid=unpack("%32C*",$fucourseid);
2458: my $cusymb=unpack("%32C*",$fusymb);
2459: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2460: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2461: ($cunique%$cuname+
2462: $cunique%$cudom+
2463: $cusymb%$cuname+
2464: $cusymb%$cudom+
2465: $cucourseid%$cuname+
2466: $cucourseid%$cudom);
2467: }
2468:
2469: sub receipt {
2470: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2471: $ENV{'request.course.id'},&symbread());
2472: }
2473:
2474: # ------------------------------------------------------------ Serves up a file
2475: # returns either the contents of the file or a -1
2476: sub getfile {
2477: my $file=shift;
2478: &repcopy($file);
2479: if (! -e $file ) { return -1; };
2480: my $fh=Apache::File->new($file);
2481: my $a='';
2482: while (<$fh>) { $a .=$_; }
2483: return $a
2484: }
2485:
2486: sub filelocation {
2487: my ($dir,$file) = @_;
2488: my $location;
2489: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2490: if ($file=~m:^/~:) { # is a contruction space reference
2491: $location = $file;
2492: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2493: } else {
2494: $file=~s/^$perlvar{'lonDocRoot'}//;
2495: $file=~s:^/*res::;
2496: if ( !( $file =~ m:^/:) ) {
2497: $location = $dir. '/'.$file;
2498: } else {
2499: $location = '/home/httpd/html/res'.$file;
2500: }
2501: }
2502: $location=~s://+:/:g; # remove duplicate /
2503: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2504: return $location;
2505: }
2506:
2507: sub hreflocation {
2508: my ($dir,$file)=@_;
2509: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
2510: my $finalpath=filelocation($dir,$file);
2511: $finalpath=~s/^\/home\/httpd\/html//;
2512: return $finalpath;
2513: } else {
2514: return $file;
2515: }
2516: }
2517:
2518: # ------------------------------------------------------------- Declutters URLs
2519:
2520: sub declutter {
2521: my $thisfn=shift;
2522: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2523: $thisfn=~s/^\///;
2524: $thisfn=~s/^res\///;
2525: return $thisfn;
2526: }
2527:
2528: # -------------------------------------------------------- Escape Special Chars
2529:
2530: sub escape {
2531: my $str=shift;
2532: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2533: return $str;
2534: }
2535:
2536: # ----------------------------------------------------- Un-Escape Special Chars
2537:
2538: sub unescape {
2539: my $str=shift;
2540: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2541: return $str;
2542: }
2543:
2544: # ================================================================ Main Program
2545:
2546: sub goodbye {
2547: &flushcourselogs();
2548: &logthis("Shutting down");
2549: }
2550:
2551: BEGIN {
2552: # ------------------------------------------------------------ Read access.conf
2553: {
2554: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2555:
2556: while (my $configline=<$config>) {
2557: if ($configline =~ /PerlSetVar/) {
2558: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2559: chomp($varvalue);
2560: $perlvar{$varname}=$varvalue;
2561: }
2562: }
2563: }
2564:
2565: # ------------------------------------------------------------- Read hosts file
2566: {
2567: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2568:
2569: while (my $configline=<$config>) {
2570: chomp($configline);
2571: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2572: $hostname{$id}=$name;
2573: $hostdom{$id}=$domain;
2574: $hostip{$id}=$ip;
2575: if ($role eq 'library') { $libserv{$id}=$name; }
2576: }
2577: }
2578:
2579: # ------------------------------------------------------ Read spare server file
2580: {
2581: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2582:
2583: while (my $configline=<$config>) {
2584: chomp($configline);
2585: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2586: $spareid{$configline}=1;
2587: }
2588: }
2589: }
2590: # ------------------------------------------------------------ Read permissions
2591: {
2592: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2593:
2594: while (my $configline=<$config>) {
2595: chomp($configline);
2596: if ($configline) {
2597: my ($role,$perm)=split(/ /,$configline);
2598: if ($perm ne '') { $pr{$role}=$perm; }
2599: }
2600: }
2601: }
2602:
2603: # -------------------------------------------- Read plain texts for permissions
2604: {
2605: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2606:
2607: while (my $configline=<$config>) {
2608: chomp($configline);
2609: if ($configline) {
2610: my ($short,$plain)=split(/:/,$configline);
2611: if ($plain ne '') { $prp{$short}=$plain; }
2612: }
2613: }
2614: }
2615:
2616: # ---------------------------------------------------------- Read package table
2617: {
2618: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2619:
2620: while (my $configline=<$config>) {
2621: chomp($configline);
2622: my ($short,$plain)=split(/:/,$configline);
2623: my ($pack,$name)=split(/\&/,$short);
2624: if ($plain ne '') {
2625: $packagetab{$pack.'&'.$name.'&name'}=$name;
2626: $packagetab{$short}=$plain;
2627: }
2628: }
2629: }
2630:
2631: %metacache=();
2632:
2633: $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
2634: $dumpcount=0;
2635:
2636: &logtouch();
2637: &logthis('<font color=yellow>INFO: Read configuration</font>');
2638: }
2639:
2640: 1;
2641: __END__
2642:
2643: =head1 NAME
2644:
2645: Apache::lonnet - TCP networking package
2646:
2647: =head1 SYNOPSIS
2648:
2649: Invoked by other LON-CAPA modules.
2650:
2651: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
2652:
2653: =head1 INTRODUCTION
2654:
2655: This module provides subroutines which interact with the
2656: lonc/lond (TCP) network layer of LON-CAPA.
2657:
2658: This is part of the LearningOnline Network with CAPA project
2659: described at http://www.lon-capa.org.
2660:
2661: =head1 HANDLER SUBROUTINE
2662:
2663: There is no handler routine for this module.
2664:
2665: =head1 OTHER SUBROUTINES
2666:
2667: =over 4
2668:
2669: =item *
2670:
2671: logtouch() : make sure the logfile, lonnet.log, exists
2672:
2673: =item *
2674:
2675: logthis() : append message to lonnet.log
2676:
2677: =item *
2678:
2679: logperm() : append a permanent message to lonnet.perm.log
2680:
2681: =item *
2682:
2683: subreply() : non-critical communication, called by &reply
2684:
2685: =item *
2686:
2687: reply() : makes two attempts to pass message; logs refusals and rejections
2688:
2689: =item *
2690:
2691: reconlonc() : tries to reconnect lonc client processes.
2692:
2693: =item *
2694:
2695: critical() : passes a critical message to another server; if cannot get
2696: through then place message in connection buffer
2697:
2698: =item *
2699:
2700: appenv(%hash) : read in current user environment, append new environment
2701: values to make new user environment
2702:
2703: =item *
2704:
2705: delenv($varname) : read in current user environment, remove all values
2706: beginning with $varname, write new user environment (note: flock is used
2707: to prevent conflicting shared read/writes with file)
2708:
2709: =item *
2710:
2711: spareserver() : find server with least workload from spare.tab
2712:
2713: =item *
2714:
2715: queryauthenticate($uname,$udom) : try to determine user's current
2716: authentication scheme
2717:
2718: =item *
2719:
2720: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
2721: servers (first use the current one)
2722:
2723: =item *
2724:
2725: homeserver($uname,$udom) : find the homebase for a user from domain's lib
2726: servers
2727:
2728: =item *
2729:
2730: idget($udom,@ids) : find the usernames behind a list of IDs (returns hash:
2731: id=>name,id=>name)
2732:
2733: =item *
2734:
2735: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
2736: name=>id,name=>id)
2737:
2738: =item *
2739:
2740: idput($udom,%ids) : store away a list of names and associated IDs
2741:
2742: =item *
2743:
2744: usection($domain,$user,$courseid) : output of section name/number or '' for
2745: "not in course" and '-1' for "no section"
2746:
2747: =item *
2748:
2749: userenvironment($domain,$user,$what) : puts out any environment parameter
2750: for a user
2751:
2752: =item *
2753:
2754: subscribe($fname) : subscribe to a resource, return URL if possible
2755:
2756: =item *
2757:
2758: repcopy($filename) : replicate file
2759:
2760: =item *
2761:
2762: ssi($url,%hash) : server side include, does a complete request cycle on url to
2763: localhost, posts hash
2764:
2765: =item *
2766:
2767: log($domain,$name,$home,$message) : write to permanent log for user; use
2768: critical subroutine
2769:
2770: =item *
2771:
2772: flushcourselogs() : flush (save) buffer logs and access logs
2773:
2774: =item *
2775:
2776: courselog($what) : save message for course in hash
2777:
2778: =item *
2779:
2780: courseacclog($what) : save message for course using &courselog(). Perform
2781: special processing for specific resource types (problems, exams, quizzes, etc).
2782:
2783: =item *
2784:
2785: countacc($url) : count the number of accesses to a given URL
2786:
2787: =item *
2788:
2789: sub checkout($symb,$tuname,$tudom,$tcrsid) : check out an item
2790:
2791: =item *
2792:
2793: sub checkin($token) : check in an item
2794:
2795: =item *
2796:
2797: sub expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
2798:
2799: =item *
2800:
2801: devalidate($symb) : devalidate spreadsheets
2802:
2803: =item *
2804:
2805: hash2str(%hash) : convert a hash into a string complete with escaping and '='
2806: and '&' separators
2807:
2808: =item *
2809:
2810: str2hash($string) : convert string to hash using unescaping and splitting on
2811: '=' and '&'
2812:
2813: =item *
2814:
2815: tmpreset($symb,$namespace,$domain,$stuname) : temporary storage
2816:
2817: =item *
2818:
2819: tmprestore($symb,$namespace,$domain,$stuname) : temporary restore
2820:
2821: =item *
2822:
2823: store($storehash,$symb,$namespace,$domain,$stuname) : stores hash permanently
2824: for this url; hashref needs to be given and should be a \%hashname; the
2825: remaining args aren't required and if they aren't passed or are '' they will
2826: be derived from the ENV
2827:
2828: =item *
2829:
2830: cstore($storehash,$symb,$namespace,$domain,$stuname) : same as store but
2831: uses critical subroutine
2832:
2833: =item *
2834:
2835: restore($symb,$namespace,$domain,$stuname) : returns hash for this symb;
2836: all args are optional
2837:
2838: =item *
2839:
2840: coursedescription($courseid) : course description
2841:
2842: =item *
2843:
2844: rolesinit($domain,$username,$authhost) : get user privileges
2845:
2846: =item *
2847:
2848: get($namespace,$storearr,$udomain,$uname) : returns hash with keys from array
2849: reference filled in from namesp ($udomain and $uname are optional)
2850:
2851: =item *
2852:
2853: del($namespace,$storearr,$udomain,$uname) : deletes keys out of array from
2854: namesp ($udomain and $uname are optional)
2855:
2856: =item *
2857:
2858: dump($namespace,$udomain,$uname) : dumps the complete namespace into a hash
2859: ($udomain and $uname are optional)
2860:
2861: =item *
2862:
2863: put($namespace,$storehash,$udomain,$uname) : stores hash in namesp
2864: ($udomain and $uname are optional)
2865:
2866: =item *
2867:
2868: cput($namespace,$storehash,$udomain,$uname) : critical put
2869: ($udomain and $uname are optional)
2870:
2871: =item *
2872:
2873: eget($namespace,$storearr,$udomain,$uname) : returns hash with keys from array
2874: reference filled in from namesp (encrypts the return communication)
2875: ($udomain and $uname are optional)
2876:
2877: =item *
2878:
2879: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
2880: actions
2881: F: full access
2882: U,I,K: authentication modes (cxx only)
2883: '': forbidden
2884: 1: user needs to choose course
2885: 2: browse allowed
2886:
2887: =item *
2888:
2889: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
2890: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
2891: and course level
2892:
2893: =item *
2894:
2895: metadata_query($query,$custom,$customshow) : make a metadata query against the
2896: network of library servers; returns file handle of where SQL and regex results
2897: will be stored for query
2898:
2899: =item *
2900:
2901: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
2902: explanation of a user role term
2903:
2904: =item *
2905:
2906: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
2907: user for the level given by URL. Optional start and end dates (leave empty
2908: string or zero for "no date")
2909:
2910: =item *
2911:
2912: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
2913:
2914: =item *
2915:
2916: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
2917: modify user
2918:
2919: =item *
2920:
2921: modifystudent($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2922: $end,$start) : modify student
2923:
2924: =item *
2925:
2926: writecoursepref($courseid,%prefs) : write preferences for a course
2927:
2928: =item *
2929:
2930: createcourse($udom,$description,$url) : make/modify course
2931:
2932: =item *
2933:
2934: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
2935: custom role; give a custom role to a user for the level given by URL. Specify
2936: name and domain of role author, and role name
2937:
2938: =item *
2939:
2940: revokerole($udom,$uname,$url,$role) : revoke a role for url
2941:
2942: =item *
2943:
2944: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
2945:
2946: =item *
2947:
2948: dirlist($uri) : return directory list based on URI
2949:
2950: =item *
2951:
2952: directcondval($number) : get current value of a condition; reads from a state
2953: string
2954:
2955: =item *
2956:
2957: condval($condidx) : value of condition index based on state
2958:
2959: =item *
2960:
2961: EXT($varname,$symbparm) : value of a variable
2962:
2963: =item *
2964:
2965: metadata($uri,$what,$liburi,$prefix,$depthcount) : get metadata; returns the
2966: metadata entry for a file; entry='keys', returns a comma separated list of keys
2967:
2968: =item *
2969:
2970: symblist($mapname,%newhash) : update symbolic storage links
2971:
2972: =item *
2973:
2974: symbread($filename) : return symbolic list entry (filename argument optional);
2975: returns the data handle
2976:
2977: =item *
2978:
2979: numval($salt) : return random seed value (addend for rndseed)
2980:
2981: =item *
2982:
2983: rndseed($symb,$courseid,$domain,$username) : create a random sum; returns
2984: a random seed, all arguments are optional, if they aren't sent it uses the
2985: environment to derive them. Note: if symb isn't sent and it can't get one
2986: from &symbread it will use the current time as its return value
2987:
2988: =item *
2989:
2990: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
2991: unfakeable, receipt
2992:
2993: =item *
2994:
2995: receipt() : API to ireceipt working off of ENV values; given out to users
2996:
2997: =item *
2998:
2999: getfile($file) : serves up a file, returns the contents of a file or -1;
3000: replicates and subscribes to the file
3001:
3002: =item *
3003:
3004: filelocation($dir,$file) : returns file system location of a file based on URI;
3005: meant to be "fairly clean" absolute reference
3006:
3007: =item *
3008:
3009: hreflocation($dir,$file) : returns file system location or a URL; same as
3010: filelocation except for hrefs
3011:
3012: =item *
3013:
3014: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
3015:
3016: =item *
3017:
3018: escape() : unpack non-word characters into CGI-compatible hex codes
3019:
3020: =item *
3021:
3022: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
3023:
3024: =item *
3025:
3026: goodbye() : flush course logs and log shutting down; it is called in srm.conf
3027: as a PerlChildExitHandler
3028:
3029: =back
3030:
3031: =cut
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