1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.256 2002/07/30 19:59:32 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 02/27/01 Scott Harrison
51: # 3/2 Gerd Kortemeyer
52: # 3/15,3/19 Scott Harrison
53: # 3/19,3/20 Gerd Kortemeyer
54: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
55: # 5/26,5/28 Gerd Kortemeyer
56: # 5/30 H. K. Ng
57: # 6/1 Gerd Kortemeyer
58: # July Guy Albertelli
59: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
60: # 10/2 Gerd Kortemeyer
61: # 10/5,10/10,11/13,11/15 Scott Harrison
62: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
63: # 12/5 Matthew Hall
64: # 12/5 Guy Albertelli
65: # 12/6,12/7,12/12 Gerd Kortemeyer
66: # 12/18 Scott Harrison
67: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
68: # YEAR=2002
69: # 1/4,2/4,2/7 Gerd Kortemeyer
70: #
71: ###
72:
73: package Apache::lonnet;
74:
75: use strict;
76: use Apache::File;
77: use LWP::UserAgent();
78: use HTTP::Headers;
79: use vars
80: qw(%perlvar %hostname %homecache %badServerCache %hostip %spareid %hostdom
81: %libserv %pr %prp %metacache %packagetab
82: %courselogs %accesshash $processmarker $dumpcount
83: %coursedombuf %coursehombuf %courseresdatacache %domaindescription);
84: use IO::Socket;
85: use GDBM_File;
86: use Apache::Constants qw(:common :http);
87: use HTML::LCParser;
88: use Fcntl qw(:flock);
89: my $readit;
90:
91: # --------------------------------------------------------------------- Logging
92:
93: sub logtouch {
94: my $execdir=$perlvar{'lonDaemons'};
95: unless (-e "$execdir/logs/lonnet.log") {
96: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
97: close $fh;
98: }
99: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
100: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
101: }
102:
103: sub logthis {
104: my $message=shift;
105: my $execdir=$perlvar{'lonDaemons'};
106: my $now=time;
107: my $local=localtime($now);
108: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
109: print $fh "$local ($$): $message\n";
110: return 1;
111: }
112:
113: sub logperm {
114: my $message=shift;
115: my $execdir=$perlvar{'lonDaemons'};
116: my $now=time;
117: my $local=localtime($now);
118: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
119: print $fh "$now:$message:$local\n";
120: return 1;
121: }
122:
123: # -------------------------------------------------- Non-critical communication
124: sub subreply {
125: my ($cmd,$server)=@_;
126: my $peerfile="$perlvar{'lonSockDir'}/$server";
127: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
128: Type => SOCK_STREAM,
129: Timeout => 10)
130: or return "con_lost";
131: print $client "$cmd\n";
132: my $answer=<$client>;
133: if (!$answer) { $answer="con_lost"; }
134: chomp($answer);
135: return $answer;
136: }
137:
138: sub reply {
139: my ($cmd,$server)=@_;
140: unless (defined($hostname{$server})) { return 'no_such_host'; }
141: my $answer=subreply($cmd,$server);
142: if ($answer eq 'con_lost') {
143: #sleep 5;
144: #$answer=subreply($cmd,$server);
145: #if ($answer eq 'con_lost') {
146: # &logthis("Second attempt con_lost on $server");
147: # my $peerfile="$perlvar{'lonSockDir'}/$server";
148: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
149: # Type => SOCK_STREAM,
150: # Timeout => 10)
151: # or return "con_lost";
152: # &logthis("Killing socket");
153: # print $client "close_connection_exit\n";
154: #sleep 5;
155: # $answer=subreply($cmd,$server);
156: #}
157: }
158: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
159: &logthis("<font color=blue>WARNING:".
160: " $cmd to $server returned $answer</font>");
161: }
162: return $answer;
163: }
164:
165: # ----------------------------------------------------------- Send USR1 to lonc
166:
167: sub reconlonc {
168: my $peerfile=shift;
169: &logthis("Trying to reconnect for $peerfile");
170: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
171: if (my $fh=Apache::File->new("$loncfile")) {
172: my $loncpid=<$fh>;
173: chomp($loncpid);
174: if (kill 0 => $loncpid) {
175: &logthis("lonc at pid $loncpid responding, sending USR1");
176: kill USR1 => $loncpid;
177: sleep 1;
178: if (-e "$peerfile") { return; }
179: &logthis("$peerfile still not there, give it another try");
180: sleep 5;
181: if (-e "$peerfile") { return; }
182: &logthis(
183: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
184: } else {
185: &logthis(
186: "<font color=blue>WARNING:".
187: " lonc at pid $loncpid not responding, giving up</font>");
188: }
189: } else {
190: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
191: }
192: }
193:
194: # ------------------------------------------------------ Critical communication
195:
196: sub critical {
197: my ($cmd,$server)=@_;
198: unless ($hostname{$server}) {
199: &logthis("<font color=blue>WARNING:".
200: " Critical message to unknown server ($server)</font>");
201: return 'no_such_host';
202: }
203: my $answer=reply($cmd,$server);
204: if ($answer eq 'con_lost') {
205: my $pingreply=reply('ping',$server);
206: &reconlonc("$perlvar{'lonSockDir'}/$server");
207: my $pongreply=reply('pong',$server);
208: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
209: $answer=reply($cmd,$server);
210: if ($answer eq 'con_lost') {
211: my $now=time;
212: my $middlename=$cmd;
213: $middlename=substr($middlename,0,16);
214: $middlename=~s/\W//g;
215: my $dfilename=
216: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
217: {
218: my $dfh;
219: if ($dfh=Apache::File->new(">$dfilename")) {
220: print $dfh "$cmd\n";
221: }
222: }
223: sleep 2;
224: my $wcmd='';
225: {
226: my $dfh;
227: if ($dfh=Apache::File->new("$dfilename")) {
228: $wcmd=<$dfh>;
229: }
230: }
231: chomp($wcmd);
232: if ($wcmd eq $cmd) {
233: &logthis("<font color=blue>WARNING: ".
234: "Connection buffer $dfilename: $cmd</font>");
235: &logperm("D:$server:$cmd");
236: return 'con_delayed';
237: } else {
238: &logthis("<font color=red>CRITICAL:"
239: ." Critical connection failed: $server $cmd</font>");
240: &logperm("F:$server:$cmd");
241: return 'con_failed';
242: }
243: }
244: }
245: return $answer;
246: }
247:
248: # ---------------------------------------------------------- Append Environment
249:
250: sub appenv {
251: my %newenv=@_;
252: foreach (keys %newenv) {
253: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
254: &logthis("<font color=blue>WARNING: ".
255: "Attempt to modify environment ".$_." to ".$newenv{$_}
256: .'</font>');
257: delete($newenv{$_});
258: } else {
259: $ENV{$_}=$newenv{$_};
260: }
261: }
262:
263: my $lockfh;
264: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
265: return 'error: '.$!;
266: }
267: unless (flock($lockfh,LOCK_EX)) {
268: &logthis("<font color=blue>WARNING: ".
269: 'Could not obtain exclusive lock in appenv: '.$!);
270: $lockfh->close();
271: return 'error: '.$!;
272: }
273:
274: my @oldenv;
275: {
276: my $fh;
277: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
278: return 'error: '.$!;
279: }
280: @oldenv=<$fh>;
281: $fh->close();
282: }
283: for (my $i=0; $i<=$#oldenv; $i++) {
284: chomp($oldenv[$i]);
285: if ($oldenv[$i] ne '') {
286: my ($name,$value)=split(/=/,$oldenv[$i]);
287: unless (defined($newenv{$name})) {
288: $newenv{$name}=$value;
289: }
290: }
291: }
292: {
293: my $fh;
294: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
295: return 'error';
296: }
297: my $newname;
298: foreach $newname (keys %newenv) {
299: print $fh "$newname=$newenv{$newname}\n";
300: }
301: $fh->close();
302: }
303:
304: $lockfh->close();
305: return 'ok';
306: }
307: # ----------------------------------------------------- Delete from Environment
308:
309: sub delenv {
310: my $delthis=shift;
311: my %newenv=();
312: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
313: &logthis("<font color=blue>WARNING: ".
314: "Attempt to delete from environment ".$delthis);
315: return 'error';
316: }
317: my @oldenv;
318: {
319: my $fh;
320: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
321: return 'error';
322: }
323: unless (flock($fh,LOCK_SH)) {
324: &logthis("<font color=blue>WARNING: ".
325: 'Could not obtain shared lock in delenv: '.$!);
326: $fh->close();
327: return 'error: '.$!;
328: }
329: @oldenv=<$fh>;
330: $fh->close();
331: }
332: {
333: my $fh;
334: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
335: return 'error';
336: }
337: unless (flock($fh,LOCK_EX)) {
338: &logthis("<font color=blue>WARNING: ".
339: 'Could not obtain exclusive lock in delenv: '.$!);
340: $fh->close();
341: return 'error: '.$!;
342: }
343: foreach (@oldenv) {
344: unless ($_=~/^$delthis/) { print $fh $_; }
345: }
346: $fh->close();
347: }
348: return 'ok';
349: }
350:
351: # ------------------------------ Find server with least workload from spare.tab
352:
353: sub spareserver {
354: my $tryserver;
355: my $spareserver='';
356: my $lowestserver=100;
357: foreach $tryserver (keys %spareid) {
358: my $answer=reply('load',$tryserver);
359: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
360: $spareserver="http://$hostname{$tryserver}";
361: $lowestserver=$answer;
362: }
363: }
364: return $spareserver;
365: }
366:
367: # --------------------------------------------- Try to change a user's password
368:
369: sub changepass {
370: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
371: $currentpass = &escape($currentpass);
372: $newpass = &escape($newpass);
373: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
374: $server);
375: if (! $answer) {
376: &logthis("No reply on password change request to $server ".
377: "by $uname in domain $udom.");
378: } elsif ($answer =~ "^ok") {
379: &logthis("$uname in $udom successfully changed their password ".
380: "on $server.");
381: } elsif ($answer =~ "^pwchange_failure") {
382: &logthis("$uname in $udom was unable to change their password ".
383: "on $server. The action was blocked by either lcpasswd ".
384: "or pwchange");
385: } elsif ($answer =~ "^non_authorized") {
386: &logthis("$uname in $udom did not get their password correct when ".
387: "attempting to change it on $server.");
388: } elsif ($answer =~ "^auth_mode_error") {
389: &logthis("$uname in $udom attempted to change their password despite ".
390: "not being locally or internally authenticated on $server.");
391: } elsif ($answer =~ "^unknown_user") {
392: &logthis("$uname in $udom attempted to change their password ".
393: "on $server but were unable to because $server is not ".
394: "their home server.");
395: } elsif ($answer =~ "^refused") {
396: &logthis("$server refused to change $uname in $udom password because ".
397: "it was sent an unencrypted request to change the password.");
398: }
399: return $answer;
400: }
401:
402: # ----------------------- Try to determine user's current authentication scheme
403:
404: sub queryauthenticate {
405: my ($uname,$udom)=@_;
406: if (($perlvar{'lonRole'} eq 'library') &&
407: ($udom eq $perlvar{'lonDefDomain'})) {
408: my $answer=reply("encrypt:currentauth:$udom:$uname",
409: $perlvar{'lonHostID'});
410: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
411: if (length($answer)) {
412: return $answer;
413: }
414: else {
415: &logthis("User $uname at $udom lacks an authentication mechanism");
416: return 'no_host';
417: }
418: }
419: }
420:
421: my $tryserver;
422: foreach $tryserver (keys %libserv) {
423: if ($hostdom{$tryserver} eq $udom) {
424: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
425: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
426: if (length($answer)) {
427: return $answer;
428: }
429: else {
430: &logthis("User $uname at $udom lacks an authentication mechanism");
431: return 'no_host';
432: }
433: }
434: }
435: }
436: &logthis("User $uname at $udom lacks an authentication mechanism");
437: return 'no_host';
438: }
439:
440: # --------- Try to authenticate user from domain's lib servers (first this one)
441:
442: sub authenticate {
443: my ($uname,$upass,$udom)=@_;
444: $upass=escape($upass);
445: $uname=~s/\W//g;
446: if (($perlvar{'lonRole'} eq 'library') &&
447: ($udom eq $perlvar{'lonDefDomain'})) {
448: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
449: if ($answer =~ /authorized/) {
450: if ($answer eq 'authorized') {
451: &logthis("User $uname at $udom authorized by local server");
452: return $perlvar{'lonHostID'};
453: }
454: if ($answer eq 'non_authorized') {
455: &logthis("User $uname at $udom rejected by local server");
456: return 'no_host';
457: }
458: }
459: }
460:
461: my $tryserver;
462: foreach $tryserver (keys %libserv) {
463: if ($hostdom{$tryserver} eq $udom) {
464: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
465: if ($answer =~ /authorized/) {
466: if ($answer eq 'authorized') {
467: &logthis("User $uname at $udom authorized by $tryserver");
468: return $tryserver;
469: }
470: if ($answer eq 'non_authorized') {
471: &logthis("User $uname at $udom rejected by $tryserver");
472: return 'no_host';
473: }
474: }
475: }
476: }
477: &logthis("User $uname at $udom could not be authenticated");
478: return 'no_host';
479: }
480:
481: # ---------------------- Find the homebase for a user from domain's lib servers
482:
483: sub homeserver {
484: my ($uname,$udom,$ignoreBadCache)=@_;
485: my $index="$uname:$udom";
486: if ($homecache{$index}) {
487: return "$homecache{$index}";
488: }
489: my $tryserver;
490: foreach $tryserver (keys %libserv) {
491: next if ($ignoreBadCache ne 'true' &&
492: exists($badServerCache{$tryserver}));
493: if ($hostdom{$tryserver} eq $udom) {
494: my $answer=reply("home:$udom:$uname",$tryserver);
495: if ($answer eq 'found') {
496: $homecache{$index}=$tryserver;
497: return $tryserver;
498: } elsif ($answer eq 'no_host') {
499: $badServerCache{$tryserver}=1;
500: }
501: }
502: }
503: return 'no_host';
504: }
505:
506: # ------------------------------------- Find the usernames behind a list of IDs
507:
508: sub idget {
509: my ($udom,@ids)=@_;
510: my %returnhash=();
511:
512: my $tryserver;
513: foreach $tryserver (keys %libserv) {
514: if ($hostdom{$tryserver} eq $udom) {
515: my $idlist=join('&',@ids);
516: $idlist=~tr/A-Z/a-z/;
517: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
518: my @answer=();
519: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
520: @answer=split(/\&/,$reply);
521: } ;
522: my $i;
523: for ($i=0;$i<=$#ids;$i++) {
524: if ($answer[$i]) {
525: $returnhash{$ids[$i]}=$answer[$i];
526: }
527: }
528: }
529: }
530: return %returnhash;
531: }
532:
533: # ------------------------------------- Find the IDs behind a list of usernames
534:
535: sub idrget {
536: my ($udom,@unames)=@_;
537: my %returnhash=();
538: foreach (@unames) {
539: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
540: }
541: return %returnhash;
542: }
543:
544: # ------------------------------- Store away a list of names and associated IDs
545:
546: sub idput {
547: my ($udom,%ids)=@_;
548: my %servers=();
549: foreach (keys %ids) {
550: my $uhom=&homeserver($_,$udom);
551: if ($uhom ne 'no_host') {
552: my $id=&escape($ids{$_});
553: $id=~tr/A-Z/a-z/;
554: my $unam=&escape($_);
555: if ($servers{$uhom}) {
556: $servers{$uhom}.='&'.$id.'='.$unam;
557: } else {
558: $servers{$uhom}=$id.'='.$unam;
559: }
560: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
561: }
562: }
563: foreach (keys %servers) {
564: &critical('idput:'.$udom.':'.$servers{$_},$_);
565: }
566: }
567:
568: # ------------------------------------- Find the section of student in a course
569:
570: sub usection {
571: my ($udom,$unam,$courseid)=@_;
572: $courseid=~s/\_/\//g;
573: $courseid=~s/^(\w)/\/$1/;
574: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
575: &homeserver($unam,$udom)))) {
576: my ($key,$value)=split(/\=/,$_);
577: $key=&unescape($key);
578: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
579: my $section=$1;
580: if ($key eq $courseid.'_st') { $section=''; }
581: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
582: my $now=time;
583: my $notactive=0;
584: if ($start) {
585: if ($now<$start) { $notactive=1; }
586: }
587: if ($end) {
588: if ($now>$end) { $notactive=1; }
589: }
590: unless ($notactive) { return $section; }
591: }
592: }
593: return '-1';
594: }
595:
596: # ------------------------------------- Read an entry from a user's environment
597:
598: sub userenvironment {
599: my ($udom,$unam,@what)=@_;
600: my %returnhash=();
601: my @answer=split(/\&/,
602: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
603: &homeserver($unam,$udom)));
604: my $i;
605: for ($i=0;$i<=$#what;$i++) {
606: $returnhash{$what[$i]}=&unescape($answer[$i]);
607: }
608: return %returnhash;
609: }
610:
611: # ----------------------------- Subscribe to a resource, return URL if possible
612:
613: sub subscribe {
614: my $fname=shift;
615: my $author=$fname;
616: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
617: my ($udom,$uname)=split(/\//,$author);
618: my $home=homeserver($uname,$udom);
619: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
620: return 'not_found';
621: }
622: my $answer=reply("sub:$fname",$home);
623: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
624: $answer.=' by '.$home;
625: }
626: return $answer;
627: }
628:
629: # -------------------------------------------------------------- Replicate file
630:
631: sub repcopy {
632: my $filename=shift;
633: $filename=~s/\/+/\//g;
634: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
635: my $transname="$filename.in.transfer";
636: if ((-e $filename) || (-e $transname)) { return OK; }
637: my $remoteurl=subscribe($filename);
638: if ($remoteurl =~ /^con_lost by/) {
639: &logthis("Subscribe returned $remoteurl: $filename");
640: return HTTP_SERVICE_UNAVAILABLE;
641: } elsif ($remoteurl eq 'not_found') {
642: &logthis("Subscribe returned not_found: $filename");
643: return HTTP_NOT_FOUND;
644: } elsif ($remoteurl =~ /^rejected by/) {
645: &logthis("Subscribe returned $remoteurl: $filename");
646: return FORBIDDEN;
647: } elsif ($remoteurl eq 'directory') {
648: return OK;
649: } else {
650: my @parts=split(/\//,$filename);
651: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
652: if ($path ne "$perlvar{'lonDocRoot'}/res") {
653: &logthis("Malconfiguration for replication: $filename");
654: return HTTP_BAD_REQUEST;
655: }
656: my $count;
657: for ($count=5;$count<$#parts;$count++) {
658: $path.="/$parts[$count]";
659: if ((-e $path)!=1) {
660: mkdir($path,0777);
661: }
662: }
663: my $ua=new LWP::UserAgent;
664: my $request=new HTTP::Request('GET',"$remoteurl");
665: my $response=$ua->request($request,$transname);
666: if ($response->is_error()) {
667: unlink($transname);
668: my $message=$response->status_line;
669: &logthis("<font color=blue>WARNING:"
670: ." LWP get: $message: $filename</font>");
671: return HTTP_SERVICE_UNAVAILABLE;
672: } else {
673: if ($remoteurl!~/\.meta$/) {
674: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
675: my $mresponse=$ua->request($mrequest,$filename.'.meta');
676: if ($mresponse->is_error()) {
677: unlink($filename.'.meta');
678: &logthis(
679: "<font color=yellow>INFO: No metadata: $filename</font>");
680: }
681: }
682: rename($transname,$filename);
683: return OK;
684: }
685: }
686: }
687:
688: # --------------------------------------------------------- Server Side Include
689:
690: sub ssi {
691:
692: my ($fn,%form)=@_;
693:
694: my $ua=new LWP::UserAgent;
695:
696: my $request;
697:
698: if (%form) {
699: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
700: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
701: } else {
702: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
703: }
704:
705: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
706: my $response=$ua->request($request);
707:
708: return $response->content;
709: }
710:
711: # ------- Add a token to a remote URI's query string to vouch for access rights
712:
713: sub tokenwrapper {
714: my $uri=shift;
715: my $token=&reply('tmpput:'.&escape($uri),$perlvar{'lonHostID'});
716: return $uri.(($uri=~/\?/)?'&':'?').
717: 'token='.$token.'&server='.$perlvar{'lonHostID'};
718: }
719:
720:
721: # ------------------------------------------------------------------------- Log
722:
723: sub log {
724: my ($dom,$nam,$hom,$what)=@_;
725: return critical("log:$dom:$nam:$what",$hom);
726: }
727:
728: # ------------------------------------------------------------------ Course Log
729:
730: sub flushcourselogs {
731: &logthis('Flushing course log buffers');
732: foreach (keys %courselogs) {
733: my $crsid=$_;
734: if (&reply('log:'.$coursedombuf{$crsid}.':'.
735: &escape($courselogs{$crsid}),
736: $coursehombuf{$crsid}) eq 'ok') {
737: delete $courselogs{$crsid};
738: } else {
739: &logthis('Failed to flush log buffer for '.$crsid);
740: if (length($courselogs{$crsid})>40000) {
741: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
742: " exceeded maximum size, deleting.</font>");
743: delete $courselogs{$crsid};
744: }
745: }
746: }
747: &logthis('Flushing access logs');
748: foreach (keys %accesshash) {
749: my $entry=$_;
750: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
751: my %temphash=($entry => $accesshash{$entry});
752: if (&Apache::lonnet::put('resevaldata',\%temphash,$1,$2) eq 'ok') {
753: delete $accesshash{$entry};
754: }
755: }
756: $dumpcount++;
757: }
758:
759: sub courselog {
760: my $what=shift;
761: $what=time.':'.$what;
762: unless ($ENV{'request.course.id'}) { return ''; }
763: $coursedombuf{$ENV{'request.course.id'}}=
764: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
765: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
766: $coursehombuf{$ENV{'request.course.id'}}=
767: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
768: if (defined $courselogs{$ENV{'request.course.id'}}) {
769: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
770: } else {
771: $courselogs{$ENV{'request.course.id'}}.=$what;
772: }
773: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
774: &flushcourselogs();
775: }
776: }
777:
778: sub courseacclog {
779: my $fnsymb=shift;
780: unless ($ENV{'request.course.id'}) { return ''; }
781: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
782: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
783: $what.=':POST';
784: foreach (keys %ENV) {
785: if ($_=~/^form\.(.*)/) {
786: $what.=':'.$1.'='.$ENV{$_};
787: }
788: }
789: }
790: &courselog($what);
791: }
792:
793: sub countacc {
794: my $url=&declutter(shift);
795: unless ($ENV{'request.course.id'}) { return ''; }
796: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
797: my $key=$processmarker.'_'.$dumpcount.'___'.$url.'___count';
798: if (defined($accesshash{$key})) {
799: $accesshash{$key}++;
800: } else {
801: $accesshash{$key}=1;
802: }
803: }
804:
805: # ----------------------------------------------------------- Check out an item
806:
807: sub checkout {
808: my ($symb,$tuname,$tudom,$tcrsid)=@_;
809: my $now=time;
810: my $lonhost=$perlvar{'lonHostID'};
811: my $infostr=&escape(
812: 'CHECKOUTTOKEN&'.
813: $tuname.'&'.
814: $tudom.'&'.
815: $tcrsid.'&'.
816: $symb.'&'.
817: $now.'&'.$ENV{'REMOTE_ADDR'});
818: my $token=&reply('tmpput:'.$infostr,$lonhost);
819: if ($token=~/^error\:/) {
820: &logthis("<font color=blue>WARNING: ".
821: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
822: "</font>");
823: return '';
824: }
825:
826: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
827: $token=~tr/a-z/A-Z/;
828:
829: my %infohash=('resource.0.outtoken' => $token,
830: 'resource.0.checkouttime' => $now,
831: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
832:
833: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
834: return '';
835: } else {
836: &logthis("<font color=blue>WARNING: ".
837: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
838: "</font>");
839: }
840:
841: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
842: &escape('Checkout '.$infostr.' - '.
843: $token)) ne 'ok') {
844: return '';
845: } else {
846: &logthis("<font color=blue>WARNING: ".
847: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
848: "</font>");
849: }
850: return $token;
851: }
852:
853: # ------------------------------------------------------------ Check in an item
854:
855: sub checkin {
856: my $token=shift;
857: my $now=time;
858: my ($ta,$tb,$lonhost)=split(/\*/,$token);
859: $lonhost=~tr/A-Z/a-z/;
860: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
861: $dtoken=~s/\W/\_/g;
862: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
863: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
864:
865: unless (($tuname) && ($tudom)) {
866: &logthis('Check in '.$token.' ('.$dtoken.') failed');
867: return '';
868: }
869:
870: unless (&allowed('mgr',$tcrsid)) {
871: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
872: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
873: return '';
874: }
875:
876: my %infohash=('resource.0.intoken' => $token,
877: 'resource.0.checkintime' => $now,
878: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
879:
880: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
881: return '';
882: }
883:
884: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
885: &escape('Checkin - '.$token)) ne 'ok') {
886: return '';
887: }
888:
889: return ($symb,$tuname,$tudom,$tcrsid);
890: }
891:
892: # --------------------------------------------- Set Expire Date for Spreadsheet
893:
894: sub expirespread {
895: my ($uname,$udom,$stype,$usymb)=@_;
896: my $cid=$ENV{'request.course.id'};
897: if ($cid) {
898: my $now=time;
899: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
900: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
901: $ENV{'course.'.$cid.'.num'}.
902: ':nohist_expirationdates:'.
903: &escape($key).'='.$now,
904: $ENV{'course.'.$cid.'.home'})
905: }
906: return 'ok';
907: }
908:
909: # ----------------------------------------------------- Devalidate Spreadsheets
910:
911: sub devalidate {
912: my $symb=shift;
913: my $cid=$ENV{'request.course.id'};
914: if ($cid) {
915: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
916: my $status=
917: &del('nohist_calculatedsheet',
918: [$key.'studentcalc'],
919: $ENV{'course.'.$cid.'.domain'},
920: $ENV{'course.'.$cid.'.num'})
921: .' '.
922: &del('nohist_calculatedsheets_'.$cid,
923: [$key.'assesscalc:'.$symb]);
924: unless ($status eq 'ok ok') {
925: &logthis('Could not devalidate spreadsheet '.
926: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
927: $symb.': '.$status);
928: }
929: }
930: }
931:
932: sub arrayref2str {
933: my ($arrayref) = @_;
934: my $result='_ARRAY_REF__';
935: foreach my $elem (@$arrayref) {
936: if (ref($elem) eq 'ARRAY') {
937: $result.=&escape(&arrayref2str($elem)).'&';
938: } elsif (ref($elem) eq 'HASH') {
939: $result.=&escape(&hashref2str($elem)).'&';
940: } elsif (ref($elem)) {
941: &logthis("Got a ref of ".(ref($elem))." skipping.");
942: } else {
943: $result.=&escape($elem).'&';
944: }
945: }
946: $result=~s/\&$//;
947: return $result;
948: }
949:
950: sub hash2str {
951: my (%hash) = @_;
952: my $result=&hashref2str(\%hash);
953: $result=~s/^_HASH_REF__//;
954: return $result;
955: }
956:
957: sub hashref2str {
958: my ($hashref)=@_;
959: my $result='_HASH_REF__';
960: foreach (keys(%$hashref)) {
961: if (ref($_) eq 'ARRAY') {
962: $result.=&escape(&arrayref2str($_)).'=';
963: } elsif (ref($_) eq 'HASH') {
964: $result.=&escape(&hashref2str($_)).'=';
965: } elsif (ref($_)) {
966: &logthis("Got a ref of ".(ref($_))." skipping.");
967: } else {
968: $result.=&escape($_).'=';
969: }
970:
971: if (ref($$hashref{$_}) eq 'ARRAY') {
972: $result.=&escape(&arrayref2str($$hashref{$_})).'&';
973: } elsif (ref($$hashref{$_}) eq 'HASH') {
974: $result.=&escape(&hashref2str($$hashref{$_})).'&';
975: } elsif (ref($$hashref{$_})) {
976: &logthis("Got a ref of ".(ref($$hashref{$_}))." skipping.");
977: } else {
978: $result.=&escape($$hashref{$_}).'&';
979: }
980: }
981: $result=~s/\&$//;
982: return $result;
983: }
984:
985: sub str2hash {
986: my ($string) = @_;
987: my %returnhash;
988: foreach (split(/\&/,$string)) {
989: my ($name,$value)=split(/\=/,$_);
990: $name=&unescape($name);
991: $value=&unescape($value);
992: if ($value =~ /^_HASH_REF__/) {
993: $value =~ s/^_HASH_REF__//;
994: my %hash=&str2hash($value);
995: $value=\%hash;
996: } elsif ($value =~ /^_ARRAY_REF__/) {
997: $value =~ s/^_ARRAY_REF__//;
998: my @array=&str2array($value);
999: $value=\@array;
1000: }
1001: $returnhash{$name}=$value;
1002: }
1003: return (%returnhash);
1004: }
1005:
1006: sub str2array {
1007: my ($string) = @_;
1008: my @returnarray;
1009: foreach my $value (split(/\&/,$string)) {
1010: $value=&unescape($value);
1011: if ($value =~ /^_HASH_REF__/) {
1012: $value =~ s/^_HASH_REF__//;
1013: my %hash=&str2hash($value);
1014: $value=\%hash;
1015: } elsif ($value =~ /^_ARRAY_REF__/) {
1016: $value =~ s/^_ARRAY_REF__//;
1017: my @array=&str2array($value);
1018: $value=\@array;
1019: }
1020: push(@returnarray,$value);
1021: }
1022: return (@returnarray);
1023: }
1024:
1025: # -------------------------------------------------------------------Temp Store
1026:
1027: sub tmpreset {
1028: my ($symb,$namespace,$domain,$stuname) = @_;
1029: if (!$symb) {
1030: $symb=&symbread();
1031: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1032: }
1033: $symb=escape($symb);
1034:
1035: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1036: $namespace=~s/\//\_/g;
1037: $namespace=~s/\W//g;
1038:
1039: #FIXME needs to do something for /pub resources
1040: if (!$domain) { $domain=$ENV{'user.domain'}; }
1041: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1042: my $path=$perlvar{'lonDaemons'}.'/tmp';
1043: my %hash;
1044: if (tie(%hash,'GDBM_File',
1045: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1046: &GDBM_WRCREAT(),0640)) {
1047: foreach my $key (keys %hash) {
1048: if ($key=~ /:$symb/) {
1049: delete($hash{$key});
1050: }
1051: }
1052: }
1053: }
1054:
1055: sub tmpstore {
1056: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1057:
1058: if (!$symb) {
1059: $symb=&symbread();
1060: if (!$symb) { $symb= $ENV{'request.url'}; }
1061: }
1062: $symb=escape($symb);
1063:
1064: if (!$namespace) {
1065: # I don't think we would ever want to store this for a course.
1066: # it seems this will only be used if we don't have a course.
1067: #$namespace=$ENV{'request.course.id'};
1068: #if (!$namespace) {
1069: $namespace=$ENV{'request.state'};
1070: #}
1071: }
1072: $namespace=~s/\//\_/g;
1073: $namespace=~s/\W//g;
1074: #FIXME needs to do something for /pub resources
1075: if (!$domain) { $domain=$ENV{'user.domain'}; }
1076: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1077: my $now=time;
1078: my %hash;
1079: my $path=$perlvar{'lonDaemons'}.'/tmp';
1080: if (tie(%hash,'GDBM_File',
1081: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1082: &GDBM_WRCREAT(),0640)) {
1083: $hash{"version:$symb"}++;
1084: my $version=$hash{"version:$symb"};
1085: my $allkeys='';
1086: foreach my $key (keys(%$storehash)) {
1087: $allkeys.=$key.':';
1088: $hash{"$version:$symb:$key"}=$$storehash{$key};
1089: }
1090: $hash{"$version:$symb:timestamp"}=$now;
1091: $allkeys.='timestamp';
1092: $hash{"$version:keys:$symb"}=$allkeys;
1093: if (untie(%hash)) {
1094: return 'ok';
1095: } else {
1096: return "error:$!";
1097: }
1098: } else {
1099: return "error:$!";
1100: }
1101: }
1102:
1103: # -----------------------------------------------------------------Temp Restore
1104:
1105: sub tmprestore {
1106: my ($symb,$namespace,$domain,$stuname) = @_;
1107:
1108: if (!$symb) {
1109: $symb=&symbread();
1110: if (!$symb) { $symb= $ENV{'request.url'}; }
1111: }
1112: $symb=escape($symb);
1113:
1114: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1115: #FIXME needs to do something for /pub resources
1116: if (!$domain) { $domain=$ENV{'user.domain'}; }
1117: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1118:
1119: my %returnhash;
1120: $namespace=~s/\//\_/g;
1121: $namespace=~s/\W//g;
1122: my %hash;
1123: my $path=$perlvar{'lonDaemons'}.'/tmp';
1124: if (tie(%hash,'GDBM_File',
1125: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1126: &GDBM_READER(),0640)) {
1127: my $version=$hash{"version:$symb"};
1128: $returnhash{'version'}=$version;
1129: my $scope;
1130: for ($scope=1;$scope<=$version;$scope++) {
1131: my $vkeys=$hash{"$scope:keys:$symb"};
1132: my @keys=split(/:/,$vkeys);
1133: my $key;
1134: $returnhash{"$scope:keys"}=$vkeys;
1135: foreach $key (@keys) {
1136: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1137: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1138: }
1139: }
1140: if (!(untie(%hash))) {
1141: return "error:$!";
1142: }
1143: } else {
1144: return "error:$!";
1145: }
1146: return %returnhash;
1147: }
1148:
1149: # ----------------------------------------------------------------------- Store
1150:
1151: sub store {
1152: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1153: my $home='';
1154:
1155: if ($stuname) { $home=&homeserver($stuname,$domain); }
1156:
1157: $symb=&symbclean($symb);
1158: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1159:
1160: &devalidate($symb);
1161:
1162: $symb=escape($symb);
1163: if (!$namespace) {
1164: unless ($namespace=$ENV{'request.course.id'}) {
1165: return '';
1166: }
1167: }
1168: if (!$domain) { $domain=$ENV{'user.domain'}; }
1169: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1170: if (!$home) { $home=$ENV{'user.home'}; }
1171: my $namevalue='';
1172: foreach (keys %$storehash) {
1173: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1174: }
1175: $namevalue=~s/\&$//;
1176: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1177: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1178: }
1179:
1180: # -------------------------------------------------------------- Critical Store
1181:
1182: sub cstore {
1183: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1184: my $home='';
1185:
1186: if ($stuname) { $home=&homeserver($stuname,$domain); }
1187:
1188: $symb=&symbclean($symb);
1189: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1190:
1191: &devalidate($symb);
1192:
1193: $symb=escape($symb);
1194: if (!$namespace) {
1195: unless ($namespace=$ENV{'request.course.id'}) {
1196: return '';
1197: }
1198: }
1199: if (!$domain) { $domain=$ENV{'user.domain'}; }
1200: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1201: if (!$home) { $home=$ENV{'user.home'}; }
1202:
1203: my $namevalue='';
1204: foreach (keys %$storehash) {
1205: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1206: }
1207: $namevalue=~s/\&$//;
1208: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1209: return critical
1210: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1211: }
1212:
1213: # --------------------------------------------------------------------- Restore
1214:
1215: sub restore {
1216: my ($symb,$namespace,$domain,$stuname) = @_;
1217: my $home='';
1218:
1219: if ($stuname) { $home=&homeserver($stuname,$domain); }
1220:
1221: if (!$symb) {
1222: unless ($symb=escape(&symbread())) { return ''; }
1223: } else {
1224: $symb=&escape(&symbclean($symb));
1225: }
1226: if (!$namespace) {
1227: unless ($namespace=$ENV{'request.course.id'}) {
1228: return '';
1229: }
1230: }
1231: if (!$domain) { $domain=$ENV{'user.domain'}; }
1232: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1233: if (!$home) { $home=$ENV{'user.home'}; }
1234: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1235:
1236: my %returnhash=();
1237: foreach (split(/\&/,$answer)) {
1238: my ($name,$value)=split(/\=/,$_);
1239: $returnhash{&unescape($name)}=&unescape($value);
1240: }
1241: my $version;
1242: for ($version=1;$version<=$returnhash{'version'};$version++) {
1243: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1244: $returnhash{$_}=$returnhash{$version.':'.$_};
1245: }
1246: }
1247: return %returnhash;
1248: }
1249:
1250: # ---------------------------------------------------------- Course Description
1251:
1252: sub coursedescription {
1253: my $courseid=shift;
1254: $courseid=~s/^\///;
1255: $courseid=~s/\_/\//g;
1256: my ($cdomain,$cnum)=split(/\//,$courseid);
1257: my $chome=&homeserver($cnum,$cdomain);
1258: if ($chome ne 'no_host') {
1259: my %returnhash=&dump('environment',$cdomain,$cnum);
1260: if (!exists($returnhash{'con_lost'})) {
1261: my $normalid=$cdomain.'_'.$cnum;
1262: my %envhash=();
1263: $returnhash{'home'}= $chome;
1264: $returnhash{'domain'} = $cdomain;
1265: $returnhash{'num'} = $cnum;
1266: while (my ($name,$value) = each %returnhash) {
1267: $envhash{'course.'.$normalid.'.'.$name}=$value;
1268: }
1269: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1270: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1271: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1272: $envhash{'course.'.$normalid.'.last_cache'}=time;
1273: $envhash{'course.'.$normalid.'.home'}=$chome;
1274: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1275: $envhash{'course.'.$normalid.'.num'}=$cnum;
1276: &appenv(%envhash);
1277: return %returnhash;
1278: }
1279: }
1280: return ();
1281: }
1282:
1283: # -------------------------------------------------------- Get user privileges
1284:
1285: sub rolesinit {
1286: my ($domain,$username,$authhost)=@_;
1287: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1288: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1289: my %allroles=();
1290: my %thesepriv=();
1291: my $now=time;
1292: my $userroles="user.login.time=$now\n";
1293: my $thesestr;
1294:
1295: if ($rolesdump ne '') {
1296: foreach (split(/&/,$rolesdump)) {
1297: if ($_!~/^rolesdef\&/) {
1298: my ($area,$role)=split(/=/,$_);
1299: $area=~s/\_\w\w$//;
1300: my ($trole,$tend,$tstart)=split(/_/,$role);
1301: $userroles.='user.role.'.$trole.'.'.$area.'='.
1302: $tstart.'.'.$tend."\n";
1303: if ($tend!=0) {
1304: if ($tend<$now) {
1305: $trole='';
1306: }
1307: }
1308: if ($tstart!=0) {
1309: if ($tstart>$now) {
1310: $trole='';
1311: }
1312: }
1313: if (($area ne '') && ($trole ne '')) {
1314: my $spec=$trole.'.'.$area;
1315: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1316: if ($trole =~ /^cr\//) {
1317: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1318: my $homsvr=homeserver($rauthor,$rdomain);
1319: if ($hostname{$homsvr} ne '') {
1320: my $roledef=
1321: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1322: $homsvr);
1323: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1324: my ($syspriv,$dompriv,$coursepriv)=
1325: split(/\_/,unescape($roledef));
1326: $allroles{'cm./'}.=':'.$syspriv;
1327: $allroles{$spec.'./'}.=':'.$syspriv;
1328: if ($tdomain ne '') {
1329: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1330: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1331: if ($trest ne '') {
1332: $allroles{'cm.'.$area}.=':'.$coursepriv;
1333: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1334: }
1335: }
1336: }
1337: }
1338: } else {
1339: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1340: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1341: if ($tdomain ne '') {
1342: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1343: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1344: if ($trest ne '') {
1345: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1346: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1347: }
1348: }
1349: }
1350: }
1351: }
1352: }
1353: my $adv=0;
1354: my $author=0;
1355: foreach (keys %allroles) {
1356: %thesepriv=();
1357: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1358: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1359: foreach (split(/:/,$allroles{$_})) {
1360: if ($_ ne '') {
1361: my ($privilege,$restrictions)=split(/&/,$_);
1362: if ($restrictions eq '') {
1363: $thesepriv{$privilege}='F';
1364: } else {
1365: if ($thesepriv{$privilege} ne 'F') {
1366: $thesepriv{$privilege}.=$restrictions;
1367: }
1368: }
1369: }
1370: }
1371: $thesestr='';
1372: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1373: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1374: }
1375: $userroles.='user.adv='.$adv."\n".
1376: 'user.author='.$author."\n";
1377: $ENV{'user.adv'}=$adv;
1378: }
1379: return $userroles;
1380: }
1381:
1382: # --------------------------------------------------------------- get interface
1383:
1384: sub get {
1385: my ($namespace,$storearr,$udomain,$uname)=@_;
1386: my $items='';
1387: foreach (@$storearr) {
1388: $items.=escape($_).'&';
1389: }
1390: $items=~s/\&$//;
1391: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1392: if (!$uname) { $uname=$ENV{'user.name'}; }
1393: my $uhome=&homeserver($uname,$udomain);
1394:
1395: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1396: my @pairs=split(/\&/,$rep);
1397: my %returnhash=();
1398: my $i=0;
1399: foreach (@$storearr) {
1400: $returnhash{$_}=unescape($pairs[$i]);
1401: $i++;
1402: }
1403: return %returnhash;
1404: }
1405:
1406: # --------------------------------------------------------------- del interface
1407:
1408: sub del {
1409: my ($namespace,$storearr,$udomain,$uname)=@_;
1410: my $items='';
1411: foreach (@$storearr) {
1412: $items.=escape($_).'&';
1413: }
1414: $items=~s/\&$//;
1415: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1416: if (!$uname) { $uname=$ENV{'user.name'}; }
1417: my $uhome=&homeserver($uname,$udomain);
1418:
1419: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1420: }
1421:
1422: # -------------------------------------------------------------- dump interface
1423:
1424: sub dump {
1425: my ($namespace,$udomain,$uname,$regexp)=@_;
1426: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1427: if (!$uname) { $uname=$ENV{'user.name'}; }
1428: my $uhome=&homeserver($uname,$udomain);
1429: if ($regexp) {
1430: $regexp=&escape($regexp);
1431: } else {
1432: $regexp='.';
1433: }
1434: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1435: my @pairs=split(/\&/,$rep);
1436: my %returnhash=();
1437: foreach (@pairs) {
1438: my ($key,$value)=split(/=/,$_);
1439: $returnhash{unescape($key)}=unescape($value);
1440: }
1441: return %returnhash;
1442: }
1443:
1444: # --------------------------------------------------------------- put interface
1445:
1446: sub put {
1447: my ($namespace,$storehash,$udomain,$uname)=@_;
1448: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1449: if (!$uname) { $uname=$ENV{'user.name'}; }
1450: my $uhome=&homeserver($uname,$udomain);
1451: my $items='';
1452: foreach (keys %$storehash) {
1453: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1454: }
1455: $items=~s/\&$//;
1456: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1457: }
1458:
1459: # ------------------------------------------------------ critical put interface
1460:
1461: sub cput {
1462: my ($namespace,$storehash,$udomain,$uname)=@_;
1463: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1464: if (!$uname) { $uname=$ENV{'user.name'}; }
1465: my $uhome=&homeserver($uname,$udomain);
1466: my $items='';
1467: foreach (keys %$storehash) {
1468: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1469: }
1470: $items=~s/\&$//;
1471: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1472: }
1473:
1474: # -------------------------------------------------------------- eget interface
1475:
1476: sub eget {
1477: my ($namespace,$storearr,$udomain,$uname)=@_;
1478: my $items='';
1479: foreach (@$storearr) {
1480: $items.=escape($_).'&';
1481: }
1482: $items=~s/\&$//;
1483: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1484: if (!$uname) { $uname=$ENV{'user.name'}; }
1485: my $uhome=&homeserver($uname,$udomain);
1486: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1487: my @pairs=split(/\&/,$rep);
1488: my %returnhash=();
1489: my $i=0;
1490: foreach (@$storearr) {
1491: $returnhash{$_}=unescape($pairs[$i]);
1492: $i++;
1493: }
1494: return %returnhash;
1495: }
1496:
1497: # ------------------------------------------------- Check for a user privilege
1498:
1499: sub allowed {
1500: my ($priv,$uri)=@_;
1501:
1502: my $orguri=$uri;
1503: $uri=&declutter($uri);
1504:
1505: # Free bre access to adm and meta resources
1506:
1507: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1508: return 'F';
1509: }
1510:
1511: # Free bre to public access
1512:
1513: if ($priv eq 'bre') {
1514: my $copyright=&metadata($uri,'copyright');
1515: if ($copyright eq 'public') { return 'F'; }
1516: if ($copyright eq 'priv') {
1517: $uri=~/([^\/]+)\/([^\/]+)\//;
1518: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
1519: return '';
1520: }
1521: }
1522: if ($copyright eq 'domain') {
1523: $uri=~/([^\/]+)\/([^\/]+)\//;
1524: unless (($ENV{'user.domain'} eq $1) ||
1525: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
1526: return '';
1527: }
1528: }
1529: }
1530:
1531: my $thisallowed='';
1532: my $statecond=0;
1533: my $courseprivid='';
1534:
1535: # Course
1536:
1537: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1538: $thisallowed.=$1;
1539: }
1540:
1541: # Domain
1542:
1543: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1544: =~/$priv\&([^\:]*)/) {
1545: $thisallowed.=$1;
1546: }
1547:
1548: # Course: uri itself is a course
1549: my $courseuri=$uri;
1550: $courseuri=~s/\_(\d)/\/$1/;
1551: $courseuri=~s/^([^\/])/\/$1/;
1552:
1553: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1554: =~/$priv\&([^\:]*)/) {
1555: $thisallowed.=$1;
1556: }
1557:
1558: # Full access at system, domain or course-wide level? Exit.
1559:
1560: if ($thisallowed=~/F/) {
1561: return 'F';
1562: }
1563:
1564: # If this is generating or modifying users, exit with special codes
1565:
1566: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1567: return $thisallowed;
1568: }
1569: #
1570: # Gathered so far: system, domain and course wide privileges
1571: #
1572: # Course: See if uri or referer is an individual resource that is part of
1573: # the course
1574:
1575: if ($ENV{'request.course.id'}) {
1576:
1577: $courseprivid=$ENV{'request.course.id'};
1578: if ($ENV{'request.course.sec'}) {
1579: $courseprivid.='/'.$ENV{'request.course.sec'};
1580: }
1581: $courseprivid=~s/\_/\//;
1582: my $checkreferer=1;
1583: my ($match,$cond)=&is_on_map($uri);
1584: if ($match) {
1585: $statecond=$cond;
1586: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1587: =~/$priv\&([^\:]*)/) {
1588: $thisallowed.=$1;
1589: $checkreferer=0;
1590: }
1591: }
1592:
1593: if ($checkreferer) {
1594: my $refuri=$ENV{'httpref.'.$orguri};
1595: unless ($refuri) {
1596: foreach (keys %ENV) {
1597: if ($_=~/^httpref\..*\*/) {
1598: my $pattern=$_;
1599: $pattern=~s/^httpref\.\/res\///;
1600: $pattern=~s/\*/\[\^\/\]\+/g;
1601: $pattern=~s/\//\\\//g;
1602: if ($orguri=~/$pattern/) {
1603: $refuri=$ENV{$_};
1604: }
1605: }
1606: }
1607: }
1608:
1609: if ($refuri) {
1610: $refuri=&declutter($refuri);
1611: my ($match,$cond)=&is_on_map($refuri);
1612: if ($match) {
1613: my $refstatecond=$cond;
1614: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1615: =~/$priv\&([^\:]*)/) {
1616: $thisallowed.=$1;
1617: $uri=$refuri;
1618: $statecond=$refstatecond;
1619: }
1620: }
1621: }
1622: }
1623: }
1624:
1625: #
1626: # Gathered now: all privileges that could apply, and condition number
1627: #
1628: #
1629: # Full or no access?
1630: #
1631:
1632: if ($thisallowed=~/F/) {
1633: return 'F';
1634: }
1635:
1636: unless ($thisallowed) {
1637: return '';
1638: }
1639:
1640: # Restrictions exist, deal with them
1641: #
1642: # C:according to course preferences
1643: # R:according to resource settings
1644: # L:unless locked
1645: # X:according to user session state
1646: #
1647:
1648: # Possibly locked functionality, check all courses
1649: # Locks might take effect only after 10 minutes cache expiration for other
1650: # courses, and 2 minutes for current course
1651:
1652: my $envkey;
1653: if ($thisallowed=~/L/) {
1654: foreach $envkey (keys %ENV) {
1655: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1656: my $courseid=$2;
1657: my $roleid=$1.'.'.$2;
1658: $courseid=~s/^\///;
1659: my $expiretime=600;
1660: if ($ENV{'request.role'} eq $roleid) {
1661: $expiretime=120;
1662: }
1663: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1664: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1665: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1666: &coursedescription($courseid);
1667: }
1668: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1669: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1670: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1671: &log($ENV{'user.domain'},$ENV{'user.name'},
1672: $ENV{'user.home'},
1673: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1674: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1675: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1676: return '';
1677: }
1678: }
1679: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1680: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1681: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1682: &log($ENV{'user.domain'},$ENV{'user.name'},
1683: $ENV{'user.home'},
1684: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1685: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1686: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1687: return '';
1688: }
1689: }
1690: }
1691: }
1692: }
1693:
1694: #
1695: # Rest of the restrictions depend on selected course
1696: #
1697:
1698: unless ($ENV{'request.course.id'}) {
1699: return '1';
1700: }
1701:
1702: #
1703: # Now user is definitely in a course
1704: #
1705:
1706:
1707: # Course preferences
1708:
1709: if ($thisallowed=~/C/) {
1710: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1711: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
1712: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1713: =~/$rolecode/) {
1714: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1715: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1716: $ENV{'request.course.id'});
1717: return '';
1718: }
1719:
1720: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
1721: =~/$unamedom/) {
1722: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1723: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
1724: $ENV{'request.course.id'});
1725: return '';
1726: }
1727: }
1728:
1729: # Resource preferences
1730:
1731: if ($thisallowed=~/R/) {
1732: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1733: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1734: if (-e $filename) {
1735: my @content;
1736: {
1737: my $fh=Apache::File->new($filename);
1738: @content=<$fh>;
1739: }
1740: if (join('',@content)=~
1741: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1742: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1743: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1744: return '';
1745:
1746: }
1747: }
1748: }
1749:
1750: # Restricted by state or randomout?
1751:
1752: if ($thisallowed=~/X/) {
1753: if ($ENV{'acc.randomout'}) {
1754: my $symb=&symbread($uri,1);
1755: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
1756: return '';
1757: }
1758: }
1759: if (&condval($statecond)) {
1760: return '2';
1761: } else {
1762: return '';
1763: }
1764: }
1765:
1766: return 'F';
1767: }
1768:
1769: # --------------------------------------------------- Is a resource on the map?
1770:
1771: sub is_on_map {
1772: my $uri=&declutter(shift);
1773: my @uriparts=split(/\//,$uri);
1774: my $filename=$uriparts[$#uriparts];
1775: my $pathname=$uri;
1776: $pathname=~s/\/$filename$//;
1777: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1778: /\&$filename\:([\d\|]+)\&/);
1779: if ($match) {
1780: return (1,$1);
1781: } else {
1782: return (0,0);
1783: }
1784: }
1785:
1786: # ----------------------------------------------------------------- Define Role
1787:
1788: sub definerole {
1789: if (allowed('mcr','/')) {
1790: my ($rolename,$sysrole,$domrole,$courole)=@_;
1791: foreach (split('/',$sysrole)) {
1792: my ($crole,$cqual)=split(/\&/,$_);
1793: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1794: if ($pr{'cr:s'}=~/$crole\&/) {
1795: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1796: return "refused:s:$crole&$cqual";
1797: }
1798: }
1799: }
1800: foreach (split('/',$domrole)) {
1801: my ($crole,$cqual)=split(/\&/,$_);
1802: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1803: if ($pr{'cr:d'}=~/$crole\&/) {
1804: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1805: return "refused:d:$crole&$cqual";
1806: }
1807: }
1808: }
1809: foreach (split('/',$courole)) {
1810: my ($crole,$cqual)=split(/\&/,$_);
1811: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1812: if ($pr{'cr:c'}=~/$crole\&/) {
1813: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1814: return "refused:c:$crole&$cqual";
1815: }
1816: }
1817: }
1818: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1819: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1820: "rolesdef_$rolename=".
1821: escape($sysrole.'_'.$domrole.'_'.$courole);
1822: return reply($command,$ENV{'user.home'});
1823: } else {
1824: return 'refused';
1825: }
1826: }
1827:
1828: # ---------------- Make a metadata query against the network of library servers
1829:
1830: sub metadata_query {
1831: my ($query,$custom,$customshow,$server_array)=@_;
1832: my %rhash;
1833: my @server_list = (defined($server_array) ? @$server_array
1834: : keys(%libserv) );
1835: for my $server (@server_list) {
1836: unless ($custom or $customshow) {
1837: my $reply=&reply("querysend:".&escape($query),$server);
1838: $rhash{$server}=$reply;
1839: }
1840: else {
1841: my $reply=&reply("querysend:".&escape($query).':'.
1842: &escape($custom).':'.&escape($customshow),
1843: $server);
1844: $rhash{$server}=$reply;
1845: }
1846: }
1847: return \%rhash;
1848: }
1849:
1850: # ----------------------------------------- Send log queries and wait for reply
1851:
1852: sub log_query {
1853: my ($uname,$udom,$query,%filters)=@_;
1854: my $uhome=&homeserver($uname,$udom);
1855: if ($uhome eq 'no_host') { return 'error: no_host'; }
1856: my $uhost=$hostname{$uhome};
1857: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
1858: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
1859: $uhome);
1860: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
1861: return get_query_reply($queryid);
1862: }
1863:
1864: sub get_query_reply {
1865: my $queryid=shift;
1866: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
1867: my $reply='';
1868: for (1..100) {
1869: sleep 2;
1870: if (-e $replyfile.'.end') {
1871: if (my $fh=Apache::File->new($replyfile)) {
1872: $reply.=<$fh>;
1873: $fh->close;
1874: } else { return 'error: reply_file_error'; }
1875: return &unescape($reply);
1876: }
1877: }
1878: return 'timeout:'.$queryid;
1879: }
1880:
1881: sub courselog_query {
1882: #
1883: # possible filters:
1884: # url: url or symb
1885: # username
1886: # domain
1887: # action: view, submit, grade
1888: # start: timestamp
1889: # end: timestamp
1890: #
1891: my (%filters)=@_;
1892: unless ($ENV{'request.course.id'}) { return 'no_course'; }
1893: if ($filters{'url'}) {
1894: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
1895: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
1896: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
1897: }
1898: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1899: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1900: return &log_query($cname,$cdom,'courselog',%filters);
1901: }
1902:
1903: sub userlog_query {
1904: my ($uname,$udom,%filters)=@_;
1905: return &log_query($uname,$udom,'userlog',%filters);
1906: }
1907:
1908: # ------------------------------------------------------------------ Plain Text
1909:
1910: sub plaintext {
1911: my $short=shift;
1912: return $prp{$short};
1913: }
1914:
1915: # ----------------------------------------------------------------- Assign Role
1916:
1917: sub assignrole {
1918: my ($udom,$uname,$url,$role,$end,$start)=@_;
1919: my $mrole;
1920: if ($role =~ /^cr\//) {
1921: unless (&allowed('ccr',$url)) {
1922: &logthis('Refused custom assignrole: '.
1923: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1924: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1925: return 'refused';
1926: }
1927: $mrole='cr';
1928: } else {
1929: my $cwosec=$url;
1930: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1931: unless (&allowed('c'.$role,$cwosec)) {
1932: &logthis('Refused assignrole: '.
1933: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1934: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1935: return 'refused';
1936: }
1937: $mrole=$role;
1938: }
1939: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1940: "$udom:$uname:$url".'_'."$mrole=$role";
1941: if ($end) { $command.='_'.$end; }
1942: if ($start) {
1943: if ($end) {
1944: $command.='_'.$start;
1945: } else {
1946: $command.='_0_'.$start;
1947: }
1948: }
1949: return &reply($command,&homeserver($uname,$udom));
1950: }
1951:
1952: # -------------------------------------------------- Modify user authentication
1953: # Overrides without validation
1954:
1955: sub modifyuserauth {
1956: my ($udom,$uname,$umode,$upass)=@_;
1957: my $uhome=&homeserver($uname,$udom);
1958: unless (&allowed('mau',$udom)) { return 'refused'; }
1959: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
1960: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1961: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
1962: &escape($upass),$uhome);
1963: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
1964: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
1965: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
1966: &log($udom,,$uname,$uhome,
1967: 'Authentication changed by '.$ENV{'user.domain'}.', '.
1968: $ENV{'user.name'}.', '.$umode.
1969: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
1970: unless ($reply eq 'ok') {
1971: &logthis('Authentication mode error: '.$reply);
1972: return 'error: '.$reply;
1973: }
1974: return 'ok';
1975: }
1976:
1977: # --------------------------------------------------------------- Modify a user
1978:
1979: sub modifyuser {
1980: my ($udom, $uname, $uid,
1981: $umode, $upass, $first,
1982: $middle, $last, $gene,
1983: $forceid, $desiredhome)=@_;
1984: $udom=~s/\W//g;
1985: $uname=~s/\W//g;
1986: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1987: $umode.', '.$first.', '.$middle.', '.
1988: $last.', '.$gene.'(forceid: '.$forceid.')'.
1989: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
1990: ' desiredhome not specified').
1991: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1992: my $uhome=&homeserver($uname,$udom,'true');
1993: # ----------------------------------------------------------------- Create User
1994: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1995: my $unhome='';
1996: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
1997: $unhome = $desiredhome;
1998: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1999: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2000: } else { # load balancing routine for determining $unhome
2001: my $tryserver;
2002: my $loadm=10000000;
2003: foreach $tryserver (keys %libserv) {
2004: if ($hostdom{$tryserver} eq $udom) {
2005: my $answer=reply('load',$tryserver);
2006: if (($answer=~/\d+/) && ($answer<$loadm)) {
2007: $loadm=$answer;
2008: $unhome=$tryserver;
2009: }
2010: }
2011: }
2012: }
2013: if (($unhome eq '') || ($unhome eq 'no_host')) {
2014: return 'error: unable to find a home server for '.$uname.
2015: ' in domain '.$udom;
2016: }
2017: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2018: &escape($upass),$unhome);
2019: unless ($reply eq 'ok') {
2020: return 'error: '.$reply;
2021: }
2022: $uhome=&homeserver($uname,$udom,'true');
2023: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2024: return 'error: verify home';
2025: }
2026: } # End of creation of new user
2027: # ---------------------------------------------------------------------- Add ID
2028: if ($uid) {
2029: $uid=~tr/A-Z/a-z/;
2030: my %uidhash=&idrget($udom,$uname);
2031: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2032: && (!$forceid)) {
2033: unless ($uid eq $uidhash{$uname}) {
2034: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2035: }
2036: } else {
2037: &idput($udom,($uname => $uid));
2038: }
2039: }
2040: # -------------------------------------------------------------- Add names, etc
2041: my %names=&get('environment',
2042: ['firstname','middlename','lastname','generation'],
2043: $udom,$uname);
2044: if ($names{'firstname'} =~ m/^error:.*/) { %names=(); }
2045: if ($first) { $names{'firstname'} = $first; }
2046: if ($middle) { $names{'middlename'} = $middle; }
2047: if ($last) { $names{'lastname'} = $last; }
2048: if ($gene) { $names{'generation'} = $gene; }
2049: my $reply = &put('environment', \%names, $udom,$uname);
2050: if ($reply ne 'ok') { return 'error: '.$reply; }
2051: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2052: $umode.', '.$first.', '.$middle.', '.
2053: $last.', '.$gene.' by '.
2054: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2055: return 'ok';
2056: }
2057:
2058: # -------------------------------------------------------------- Modify student
2059:
2060: sub modifystudent {
2061: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2062: $end,$start,$forceid,$desiredhome)=@_;
2063: my $cid='';
2064: unless ($cid=$ENV{'request.course.id'}) {
2065: return 'not_in_class';
2066: }
2067: # --------------------------------------------------------------- Make the user
2068: my $reply=&modifyuser
2069: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2070: $desiredhome);
2071: unless ($reply eq 'ok') { return $reply; }
2072: my $uhome=&homeserver($uname,$udom);
2073: if (($uhome eq '') || ($uhome eq 'no_host')) {
2074: return 'error: no such user';
2075: }
2076: # -------------------------------------------------- Add student to course list
2077: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2078: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2079: &escape($uname.':'.$udom).'='.
2080: &escape($end.':'.$start),
2081: $ENV{'course.'.$cid.'.home'});
2082: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2083: return 'error: '.$reply;
2084: }
2085: # ---------------------------------------------------- Add student role to user
2086: my $uurl='/'.$cid;
2087: $uurl=~s/\_/\//g;
2088: if ($usec) {
2089: $uurl.='/'.$usec;
2090: }
2091: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2092: }
2093:
2094: # ------------------------------------------------- Write to course preferences
2095:
2096: sub writecoursepref {
2097: my ($courseid,%prefs)=@_;
2098: $courseid=~s/^\///;
2099: $courseid=~s/\_/\//g;
2100: my ($cdomain,$cnum)=split(/\//,$courseid);
2101: my $chome=homeserver($cnum,$cdomain);
2102: if (($chome eq '') || ($chome eq 'no_host')) {
2103: return 'error: no such course';
2104: }
2105: my $cstring='';
2106: foreach (keys %prefs) {
2107: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2108: }
2109: $cstring=~s/\&$//;
2110: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2111: }
2112:
2113: # ---------------------------------------------------------- Make/modify course
2114:
2115: sub createcourse {
2116: my ($udom,$description,$url)=@_;
2117: $url=&declutter($url);
2118: my $cid='';
2119: unless (&allowed('ccc',$ENV{'user.domain'})) {
2120: return 'refused';
2121: }
2122: unless ($udom eq $ENV{'user.domain'}) {
2123: return 'refused';
2124: }
2125: # ------------------------------------------------------------------- Create ID
2126: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2127: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2128: # ----------------------------------------------- Make sure that does not exist
2129: my $uhome=&homeserver($uname,$udom,'true');
2130: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2131: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2132: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2133: $uhome=&homeserver($uname,$udom,'true');
2134: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2135: return 'error: unable to generate unique course-ID';
2136: }
2137: }
2138: # ------------------------------------------------------------- Make the course
2139: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2140: $ENV{'user.home'});
2141: unless ($reply eq 'ok') { return 'error: '.$reply; }
2142: $uhome=&homeserver($uname,$udom,'true');
2143: if (($uhome eq '') || ($uhome eq 'no_host')) {
2144: return 'error: no such course';
2145: }
2146: &writecoursepref($udom.'_'.$uname,
2147: ('description' => $description,
2148: 'url' => $url));
2149: return '/'.$udom.'/'.$uname;
2150: }
2151:
2152: # ---------------------------------------------------------- Assign Custom Role
2153:
2154: sub assigncustomrole {
2155: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2156: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2157: $end,$start);
2158: }
2159:
2160: # ----------------------------------------------------------------- Revoke Role
2161:
2162: sub revokerole {
2163: my ($udom,$uname,$url,$role)=@_;
2164: my $now=time;
2165: return &assignrole($udom,$uname,$url,$role,$now);
2166: }
2167:
2168: # ---------------------------------------------------------- Revoke Custom Role
2169:
2170: sub revokecustomrole {
2171: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2172: my $now=time;
2173: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2174: }
2175:
2176: # ------------------------------------------------------------ Directory lister
2177:
2178: sub dirlist {
2179: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2180:
2181: $uri=~s/^\///;
2182: $uri=~s/\/$//;
2183: my ($udom, $uname);
2184: (undef,$udom,$uname)=split(/\//,$uri);
2185: if(defined($userdomain)) {
2186: $udom = $userdomain;
2187: }
2188: if(defined($username)) {
2189: $uname = $username;
2190: }
2191:
2192: my $dirRoot = $perlvar{'lonDocRoot'};
2193: if(defined($alternateDirectoryRoot)) {
2194: $dirRoot = $alternateDirectoryRoot;
2195: $dirRoot =~ s/\/$//;
2196: }
2197:
2198: if($udom) {
2199: if($uname) {
2200: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2201: homeserver($uname,$udom));
2202: return split(/:/,$listing);
2203: } elsif(!defined($alternateDirectoryRoot)) {
2204: my $tryserver;
2205: my %allusers=();
2206: foreach $tryserver (keys %libserv) {
2207: if($hostdom{$tryserver} eq $udom) {
2208: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2209: $udom, $tryserver);
2210: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2211: && ($listing ne 'con_lost')) {
2212: foreach (split(/:/,$listing)) {
2213: my ($entry,@stat)=split(/&/,$_);
2214: $allusers{$entry}=1;
2215: }
2216: }
2217: }
2218: }
2219: my $alluserstr='';
2220: foreach (sort keys %allusers) {
2221: $alluserstr.=$_.'&user:';
2222: }
2223: $alluserstr=~s/:$//;
2224: return split(/:/,$alluserstr);
2225: } else {
2226: my @emptyResults = ();
2227: push(@emptyResults, 'missing user name');
2228: return split(':',@emptyResults);
2229: }
2230: } elsif(!defined($alternateDirectoryRoot)) {
2231: my $tryserver;
2232: my %alldom=();
2233: foreach $tryserver (keys %libserv) {
2234: $alldom{$hostdom{$tryserver}}=1;
2235: }
2236: my $alldomstr='';
2237: foreach (sort keys %alldom) {
2238: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2239: }
2240: $alldomstr=~s/:$//;
2241: return split(/:/,$alldomstr);
2242: } else {
2243: my @emptyResults = ();
2244: push(@emptyResults, 'missing domain');
2245: return split(':',@emptyResults);
2246: }
2247: }
2248:
2249: # -------------------------------------------------------- Value of a Condition
2250:
2251: sub directcondval {
2252: my $number=shift;
2253: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2254: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2255: } else {
2256: return 2;
2257: }
2258: }
2259:
2260: sub condval {
2261: my $condidx=shift;
2262: my $result=0;
2263: my $allpathcond='';
2264: foreach (split(/\|/,$condidx)) {
2265: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2266: $allpathcond.=
2267: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2268: }
2269: }
2270: $allpathcond=~s/\|$//;
2271: if ($ENV{'request.course.id'}) {
2272: if ($allpathcond) {
2273: my $operand='|';
2274: my @stack;
2275: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2276: if ($_ eq '(') {
2277: push @stack,($operand,$result)
2278: } elsif ($_ eq ')') {
2279: my $before=pop @stack;
2280: if (pop @stack eq '&') {
2281: $result=$result>$before?$before:$result;
2282: } else {
2283: $result=$result>$before?$result:$before;
2284: }
2285: } elsif (($_ eq '&') || ($_ eq '|')) {
2286: $operand=$_;
2287: } else {
2288: my $new=directcondval($_);
2289: if ($operand eq '&') {
2290: $result=$result>$new?$new:$result;
2291: } else {
2292: $result=$result>$new?$result:$new;
2293: }
2294: }
2295: }
2296: }
2297: }
2298: return $result;
2299: }
2300:
2301: # --------------------------------------------------- Course Resourcedata Query
2302:
2303: sub courseresdata {
2304: my ($coursenum,$coursedomain,@which)=@_;
2305: my $coursehom=&homeserver($coursenum,$coursedomain);
2306: my $hashid=$coursenum.':'.$coursedomain;
2307: my $dodump=0;
2308: if (!defined($courseresdatacache{$hashid.'.time'})) {
2309: $dodump=1;
2310: } else {
2311: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2312: }
2313: if ($dodump) {
2314: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2315: my ($tmp) = keys(%dumpreply);
2316: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2317: $courseresdatacache{$hashid.'.time'}=time;
2318: $courseresdatacache{$hashid}=\%dumpreply;
2319: }
2320: }
2321: foreach my $item (@which) {
2322: if ($courseresdatacache{$hashid}->{$item}) {
2323: return $courseresdatacache{$hashid}->{$item};
2324: }
2325: }
2326: return '';
2327: }
2328:
2329: # --------------------------------------------------------- Value of a Variable
2330:
2331: sub EXT {
2332: my ($varname,$symbparm,$udom,$uname)=@_;
2333:
2334: unless ($varname) { return ''; }
2335:
2336: #get real user name/domain, courseid and symb
2337: my $courseid;
2338: if (!($uname && $udom)) {
2339: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2340: if (!$symbparm) { $symbparm=$cursymb; }
2341: } else {
2342: $courseid=$ENV{'request.course.id'};
2343: }
2344:
2345: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2346: my $rest;
2347: if ($therest[0]) {
2348: $rest=join('.',@therest);
2349: } else {
2350: $rest='';
2351: }
2352: my $qualifierrest=$qualifier;
2353: if ($rest) { $qualifierrest.='.'.$rest; }
2354: my $spacequalifierrest=$space;
2355: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2356: if ($realm eq 'user') {
2357: # --------------------------------------------------------------- user.resource
2358: if ($space eq 'resource') {
2359: my %restored=&restore(undef,undef,$udom,$uname);
2360: return $restored{$qualifierrest};
2361: # ----------------------------------------------------------------- user.access
2362: } elsif ($space eq 'access') {
2363: # FIXME - not supporting calls for a specific user
2364: return &allowed($qualifier,$rest);
2365: # ------------------------------------------ user.preferences, user.environment
2366: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2367: if (($uname eq $ENV{'user.name'}) &&
2368: ($udom eq $ENV{'user.domain'})) {
2369: return $ENV{join('.',('environment',$qualifierrest))};
2370: } else {
2371: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
2372: return $returnhash{$qualifierrest};
2373: }
2374: # ----------------------------------------------------------------- user.course
2375: } elsif ($space eq 'course') {
2376: # FIXME - not supporting calls for a specific user
2377: return $ENV{join('.',('request.course',$qualifier))};
2378: # ------------------------------------------------------------------- user.role
2379: } elsif ($space eq 'role') {
2380: # FIXME - not supporting calls for a specific user
2381: my ($role,$where)=split(/\./,$ENV{'request.role'});
2382: if ($qualifier eq 'value') {
2383: return $role;
2384: } elsif ($qualifier eq 'extent') {
2385: return $where;
2386: }
2387: # ----------------------------------------------------------------- user.domain
2388: } elsif ($space eq 'domain') {
2389: return $udom;
2390: # ------------------------------------------------------------------- user.name
2391: } elsif ($space eq 'name') {
2392: return $uname;
2393: # ---------------------------------------------------- Any other user namespace
2394: } else {
2395: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2396: my %reply=&get($space,[$item]);
2397: return $reply{$item};
2398: }
2399: } elsif ($realm eq 'query') {
2400: # ---------------------------------------------- pull stuff out of query string
2401: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
2402: return $ENV{'form.'.$space};
2403: } elsif ($realm eq 'request') {
2404: # ------------------------------------------------------------- request.browser
2405: if ($space eq 'browser') {
2406: return $ENV{'browser.'.$qualifier};
2407: # ------------------------------------------------------------ request.filename
2408: } else {
2409: return $ENV{'request.'.$spacequalifierrest};
2410: }
2411: } elsif ($realm eq 'course') {
2412: # ---------------------------------------------------------- course.description
2413: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
2414: } elsif ($realm eq 'resource') {
2415:
2416: if ($courseid eq $ENV{'request.course.id'}) {
2417:
2418: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2419:
2420: # ----------------------------------------------------- Cascading lookup scheme
2421: if (!$symbparm) { $symbparm=&symbread(); }
2422: my $symbp=$symbparm;
2423: my $mapp=(split(/\_\_\_/,$symbp))[0];
2424:
2425: my $symbparm=$symbp.'.'.$spacequalifierrest;
2426: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2427:
2428: my $section;
2429: if (($ENV{'user.name'} eq $uname) &&
2430: ($ENV{'user.domain'} eq $udom)) {
2431: $section=$ENV{'request.course.sec'};
2432: } else {
2433: $section=&usection($udom,$uname,$courseid);
2434: }
2435:
2436: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
2437: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
2438: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
2439:
2440: my $courselevel=$courseid.'.'.$spacequalifierrest;
2441: my $courselevelr=$courseid.'.'.$symbparm;
2442: my $courselevelm=$courseid.'.'.$mapparm;
2443:
2444: # ----------------------------------------------------------- first, check user
2445: my %resourcedata=&get('resourcedata',
2446: [$courselevelr,$courselevelm,$courselevel],
2447: $udom,$uname);
2448: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2449: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2450:
2451: if ($resourcedata{$courselevelr}) {
2452: return $resourcedata{$courselevelr}; }
2453: if ($resourcedata{$courselevelm}) {
2454: return $resourcedata{$courselevelm}; }
2455: if ($resourcedata{$courselevel}) {
2456: return $resourcedata{$courselevel}; }
2457: } else {
2458: if ($resourcedata{$courselevelr}!~/No such file/) {
2459: &logthis("<font color=blue>WARNING:".
2460: " Trying to get resource data for ".
2461: $uname." at ".$udom.": ".
2462: $resourcedata{$courselevelr}."</font>");
2463: }
2464: }
2465:
2466: # -------------------------------------------------------- second, check course
2467:
2468: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
2469: $ENV{'course.'.$courseid.'.domain'},
2470: ($seclevelr,$seclevelm,$seclevel,
2471: $courselevelr,$courselevelm,
2472: $courselevel));
2473: if ($coursereply) { return $coursereply; }
2474:
2475: # ------------------------------------------------------ third, check map parms
2476: my %parmhash=();
2477: my $thisparm='';
2478: if (tie(%parmhash,'GDBM_File',
2479: $ENV{'request.course.fn'}.'_parms.db',
2480: &GDBM_READER(),0640)) {
2481: $thisparm=$parmhash{$symbparm};
2482: untie(%parmhash);
2483: }
2484: if ($thisparm) { return $thisparm; }
2485: }
2486: # --------------------------------------------- last, look in resource metadata
2487:
2488: $spacequalifierrest=~s/\./\_/;
2489: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2490: if ($metadata) { return $metadata; }
2491: $metadata=&metadata($ENV{'request.filename'},
2492: 'parameter_'.$spacequalifierrest);
2493: if ($metadata) { return $metadata; }
2494:
2495: # ------------------------------------------------------------------ Cascade up
2496: unless ($space eq '0') {
2497: my ($part,$id)=split(/\_/,$space);
2498: if ($id) {
2499: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2500: $symbparm,$udom,$uname);
2501: if ($partgeneral) { return $partgeneral; }
2502: } else {
2503: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2504: $symbparm,$udom,$uname);
2505: if ($resourcegeneral) { return $resourcegeneral; }
2506: }
2507: }
2508:
2509: # ---------------------------------------------------- Any other user namespace
2510: } elsif ($realm eq 'environment') {
2511: # ----------------------------------------------------------------- environment
2512: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
2513: return $ENV{'environment.'.$spacequalifierrest};
2514: } else {
2515: my %returnhash=&userenvironment($udom,$uname,
2516: $spacequalifierrest);
2517: return $returnhash{$spacequalifierrest};
2518: }
2519: } elsif ($realm eq 'system') {
2520: # ----------------------------------------------------------------- system.time
2521: if ($space eq 'time') {
2522: return time;
2523: }
2524: }
2525: return '';
2526: }
2527:
2528: # ---------------------------------------------------------------- Get metadata
2529:
2530: sub metadata {
2531: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2532:
2533: $uri=&declutter($uri);
2534: my $filename=$uri;
2535: $uri=~s/\.meta$//;
2536: #
2537: # Is the metadata already cached?
2538: # Look at timestamp of caching
2539: # Everything is cached by the main uri, libraries are never directly cached
2540: #
2541: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2542: #
2543: # Is this a recursive call for a library?
2544: #
2545: if ($liburi) {
2546: $liburi=&declutter($liburi);
2547: $filename=$liburi;
2548: }
2549: my %metathesekeys=();
2550: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2551: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2552: my $parser=HTML::LCParser->new(\$metastring);
2553: my $token;
2554: undef %metathesekeys;
2555: while ($token=$parser->get_token) {
2556: if ($token->[0] eq 'S') {
2557: if (defined($token->[2]->{'package'})) {
2558: #
2559: # This is a package - get package info
2560: #
2561: my $package=$token->[2]->{'package'};
2562: my $keyroot='';
2563: if ($prefix) {
2564: $keyroot.='_'.$prefix;
2565: } else {
2566: if (defined($token->[2]->{'part'})) {
2567: $keyroot.='_'.$token->[2]->{'part'};
2568: }
2569: }
2570: if (defined($token->[2]->{'id'})) {
2571: $keyroot.='_'.$token->[2]->{'id'};
2572: }
2573: if ($metacache{$uri.':packages'}) {
2574: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2575: } else {
2576: $metacache{$uri.':packages'}=$package.$keyroot;
2577: }
2578: foreach (keys %packagetab) {
2579: if ($_=~/^$package\&/) {
2580: my ($pack,$name,$subp)=split(/\&/,$_);
2581: my $value=$packagetab{$_};
2582: my $part=$keyroot;
2583: $part=~s/^\_//;
2584: if ($subp eq 'display') {
2585: $value.=' [Part: '.$part.']';
2586: }
2587: my $unikey='parameter'.$keyroot.'_'.$name;
2588: $metathesekeys{$unikey}=1;
2589: $metacache{$uri.':'.$unikey.'.part'}=$part;
2590: unless
2591: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2592: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2593: }
2594: }
2595: }
2596: } else {
2597: #
2598: # This is not a package - some other kind of start tag
2599: #
2600: my $entry=$token->[1];
2601: my $unikey;
2602: if ($entry eq 'import') {
2603: $unikey='';
2604: } else {
2605: $unikey=$entry;
2606: }
2607: if ($prefix) {
2608: $unikey.=$prefix;
2609: } else {
2610: if (defined($token->[2]->{'part'})) {
2611: $unikey.='_'.$token->[2]->{'part'};
2612: }
2613: }
2614: if (defined($token->[2]->{'id'})) {
2615: $unikey.='_'.$token->[2]->{'id'};
2616: }
2617:
2618: if ($entry eq 'import') {
2619: #
2620: # Importing a library here
2621: #
2622: if (defined($depthcount)) { $depthcount++; } else
2623: { $depthcount=0; }
2624: if ($depthcount<20) {
2625: foreach (split(/\,/,&metadata($uri,'keys',
2626: $parser->get_text('/import'),$unikey,
2627: $depthcount))) {
2628: $metathesekeys{$_}=1;
2629: }
2630: }
2631: } else {
2632:
2633: if (defined($token->[2]->{'name'})) {
2634: $unikey.='_'.$token->[2]->{'name'};
2635: }
2636: $metathesekeys{$unikey}=1;
2637: foreach (@{$token->[3]}) {
2638: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2639: }
2640: unless (
2641: $metacache{$uri.':'.$unikey}=&HTML::Entities::decode($parser->get_text('/'.$entry))
2642: ) { $metacache{$uri.':'.$unikey}=
2643: $metacache{$uri.':'.$unikey.'.default'};
2644: }
2645: # end of not-a-package not-a-library import
2646: }
2647: # end of not-a-package start tag
2648: }
2649: # the next is the end of "start tag"
2650: }
2651: }
2652: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2653: $metacache{$uri.':cachedtimestamp'}=time;
2654: # this is the end of "was not already recently cached
2655: }
2656: return $metacache{$uri.':'.$what};
2657: }
2658:
2659: # ------------------------------------------------- Update symbolic store links
2660:
2661: sub symblist {
2662: my ($mapname,%newhash)=@_;
2663: $mapname=declutter($mapname);
2664: my %hash;
2665: if (($ENV{'request.course.fn'}) && (%newhash)) {
2666: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2667: &GDBM_WRCREAT(),0640)) {
2668: foreach (keys %newhash) {
2669: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2670: }
2671: if (untie(%hash)) {
2672: return 'ok';
2673: }
2674: }
2675: }
2676: return 'error';
2677: }
2678:
2679: # --------------------------------------------------------------- Verify a symb
2680:
2681: sub symbverify {
2682: my ($symb,$thisfn)=@_;
2683: $thisfn=&declutter($thisfn);
2684: # direct jump to resource in page or to a sequence - will construct own symbs
2685: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
2686: # check URL part
2687: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
2688: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
2689:
2690: $symb=&symbclean($symb);
2691:
2692: my %bighash;
2693: my $okay=0;
2694: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2695: &GDBM_READER(),0640)) {
2696: my $ids=$bighash{'ids_/res/'.$thisfn};
2697: unless ($ids) {
2698: $ids=$bighash{'ids_/'.$thisfn};
2699: }
2700: if ($ids) {
2701: # ------------------------------------------------------------------- Has ID(s)
2702: foreach (split(/\,/,$ids)) {
2703: my ($mapid,$resid)=split(/\./,$_);
2704: if (
2705: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
2706: eq $symb) {
2707: $okay=1;
2708: }
2709: }
2710: }
2711: untie(%bighash);
2712: }
2713: return $okay;
2714: }
2715:
2716: # --------------------------------------------------------------- Clean-up symb
2717:
2718: sub symbclean {
2719: my $symb=shift;
2720:
2721: # remove version from map
2722: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
2723:
2724: # remove version from URL
2725: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
2726:
2727: return $symb;
2728: }
2729:
2730: # ------------------------------------------------------ Return symb list entry
2731:
2732: sub symbread {
2733: my ($thisfn,$donotrecurse)=@_;
2734: # no filename provided? try from environment
2735: unless ($thisfn) {
2736: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
2737: $thisfn=$ENV{'request.filename'};
2738: }
2739: # is that filename actually a symb? Verify, clean, and return
2740: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
2741: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
2742: }
2743: $thisfn=declutter($thisfn);
2744: my %hash;
2745: my %bighash;
2746: my $syval='';
2747: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2748: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2749: &GDBM_READER(),0640)) {
2750: $syval=$hash{$thisfn};
2751: untie(%hash);
2752: }
2753: # ---------------------------------------------------------- There was an entry
2754: if ($syval) {
2755: unless ($syval=~/\_\d+$/) {
2756: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2757: &appenv('request.ambiguous' => $thisfn);
2758: return '';
2759: }
2760: $syval.=$1;
2761: }
2762: } else {
2763: # ------------------------------------------------------- Was not in symb table
2764: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2765: &GDBM_READER(),0640)) {
2766: # ---------------------------------------------- Get ID(s) for current resource
2767: my $ids=$bighash{'ids_/res/'.$thisfn};
2768: unless ($ids) {
2769: $ids=$bighash{'ids_/'.$thisfn};
2770: }
2771: unless ($ids) {
2772: # alias?
2773: $ids=$bighash{'mapalias_'.$thisfn};
2774: }
2775: if ($ids) {
2776: # ------------------------------------------------------------------- Has ID(s)
2777: my @possibilities=split(/\,/,$ids);
2778: if ($#possibilities==0) {
2779: # ----------------------------------------------- There is only one possibility
2780: my ($mapid,$resid)=split(/\./,$ids);
2781: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2782: } elsif (!$donotrecurse) {
2783: # ------------------------------------------ There is more than one possibility
2784: my $realpossible=0;
2785: foreach (@possibilities) {
2786: my $file=$bighash{'src_'.$_};
2787: if (&allowed('bre',$file)) {
2788: my ($mapid,$resid)=split(/\./,$_);
2789: if ($bighash{'map_type_'.$mapid} ne 'page') {
2790: $realpossible++;
2791: $syval=declutter($bighash{'map_id_'.$mapid}).
2792: '___'.$resid;
2793: }
2794: }
2795: }
2796: if ($realpossible!=1) { $syval=''; }
2797: } else {
2798: $syval='';
2799: }
2800: }
2801: untie(%bighash)
2802: }
2803: }
2804: if ($syval) {
2805: return &symbclean($syval.'___'.$thisfn);
2806: }
2807: }
2808: &appenv('request.ambiguous' => $thisfn);
2809: return '';
2810: }
2811:
2812: # ---------------------------------------------------------- Return random seed
2813:
2814: sub numval {
2815: my $txt=shift;
2816: $txt=~tr/A-J/0-9/;
2817: $txt=~tr/a-j/0-9/;
2818: $txt=~tr/K-T/0-9/;
2819: $txt=~tr/k-t/0-9/;
2820: $txt=~tr/U-Z/0-5/;
2821: $txt=~tr/u-z/0-5/;
2822: $txt=~s/\D//g;
2823: return int($txt);
2824: }
2825:
2826: sub rndseed {
2827: my ($symb,$courseid,$domain,$username)=@_;
2828: if (!$symb) {
2829: unless ($symb=&symbread()) { return time; }
2830: }
2831: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2832: if (!$domain) {$domain=$ENV{'user.domain'};}
2833: if (!$username) {$username=$ENV{'user.name'};}
2834: {
2835: use integer;
2836: my $symbchck=unpack("%32C*",$symb) << 27;
2837: my $symbseed=numval($symb) << 22;
2838: my $namechck=unpack("%32C*",$username) << 17;
2839: my $nameseed=numval($username) << 12;
2840: my $domainseed=unpack("%32C*",$domain) << 7;
2841: my $courseseed=unpack("%32C*",$courseid);
2842: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2843: #uncommenting these lines can break things!
2844: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2845: #&Apache::lonxml::debug("rndseed :$num:$symb");
2846: return $num;
2847: }
2848: }
2849:
2850: sub ireceipt {
2851: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2852: my $cuname=unpack("%32C*",$funame);
2853: my $cudom=unpack("%32C*",$fudom);
2854: my $cucourseid=unpack("%32C*",$fucourseid);
2855: my $cusymb=unpack("%32C*",$fusymb);
2856: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2857: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2858: ($cunique%$cuname+
2859: $cunique%$cudom+
2860: $cusymb%$cuname+
2861: $cusymb%$cudom+
2862: $cucourseid%$cuname+
2863: $cucourseid%$cudom);
2864: }
2865:
2866: sub receipt {
2867: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2868: $ENV{'request.course.id'},&symbread());
2869: }
2870:
2871: # ------------------------------------------------------------ Serves up a file
2872: # returns either the contents of the file or a -1
2873: sub getfile {
2874: my $file=shift;
2875: &repcopy($file);
2876: if (! -e $file ) { return -1; };
2877: my $fh=Apache::File->new($file);
2878: my $a='';
2879: while (<$fh>) { $a .=$_; }
2880: return $a
2881: }
2882:
2883: sub filelocation {
2884: my ($dir,$file) = @_;
2885: my $location;
2886: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2887: if ($file=~m:^/~:) { # is a contruction space reference
2888: $location = $file;
2889: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2890: } else {
2891: $file=~s/^$perlvar{'lonDocRoot'}//;
2892: $file=~s:^/*res::;
2893: if ( !( $file =~ m:^/:) ) {
2894: $location = $dir. '/'.$file;
2895: } else {
2896: $location = '/home/httpd/html/res'.$file;
2897: }
2898: }
2899: $location=~s://+:/:g; # remove duplicate /
2900: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2901: return $location;
2902: }
2903:
2904: sub hreflocation {
2905: my ($dir,$file)=@_;
2906: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
2907: my $finalpath=filelocation($dir,$file);
2908: $finalpath=~s/^\/home\/httpd\/html//;
2909: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
2910: return $finalpath;
2911: } else {
2912: return $file;
2913: }
2914: }
2915:
2916: # ------------------------------------------------------------- Declutters URLs
2917:
2918: sub declutter {
2919: my $thisfn=shift;
2920: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2921: $thisfn=~s/^\///;
2922: $thisfn=~s/^res\///;
2923: $thisfn=~s/\?.+$//;
2924: return $thisfn;
2925: }
2926:
2927: # -------------------------------------------------------- Escape Special Chars
2928:
2929: sub escape {
2930: my $str=shift;
2931: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2932: return $str;
2933: }
2934:
2935: # ----------------------------------------------------- Un-Escape Special Chars
2936:
2937: sub unescape {
2938: my $str=shift;
2939: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2940: return $str;
2941: }
2942:
2943: # ================================================================ Main Program
2944:
2945: sub goodbye {
2946: &logthis("Starting Shut down");
2947: &flushcourselogs();
2948: &logthis("Shutting down");
2949: }
2950:
2951: BEGIN {
2952: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
2953: unless ($readit) {
2954: {
2955: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
2956:
2957: while (my $configline=<$config>) {
2958: if ($configline =~ /^[^\#]*PerlSetVar/) {
2959: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2960: chomp($varvalue);
2961: $perlvar{$varname}=$varvalue;
2962: }
2963: }
2964: }
2965: {
2966: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
2967:
2968: while (my $configline=<$config>) {
2969: if ($configline =~ /^[^\#]*PerlSetVar/) {
2970: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2971: chomp($varvalue);
2972: $perlvar{$varname}=$varvalue;
2973: }
2974: }
2975: }
2976:
2977: # ------------------------------------------------------------- Read hosts file
2978: {
2979: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2980:
2981: while (my $configline=<$config>) {
2982: chomp($configline);
2983: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
2984: if ($id && $domain && $role && $name && $ip) {
2985: $hostname{$id}=$name;
2986: $hostdom{$id}=$domain;
2987: $hostip{$id}=$ip;
2988: if ($domdescr) { $domaindescription{$domain}=$domdescr; }
2989: if ($role eq 'library') { $libserv{$id}=$name; }
2990: } else {
2991: if ($configline) {
2992: &logthis("Skipping hosts.tab line -$configline-");
2993: }
2994: }
2995: }
2996: }
2997:
2998: # ------------------------------------------------------ Read spare server file
2999: {
3000: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3001:
3002: while (my $configline=<$config>) {
3003: chomp($configline);
3004: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
3005: $spareid{$configline}=1;
3006: }
3007: }
3008: }
3009: # ------------------------------------------------------------ Read permissions
3010: {
3011: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3012:
3013: while (my $configline=<$config>) {
3014: chomp($configline);
3015: if ($configline) {
3016: my ($role,$perm)=split(/ /,$configline);
3017: if ($perm ne '') { $pr{$role}=$perm; }
3018: }
3019: }
3020: }
3021:
3022: # -------------------------------------------- Read plain texts for permissions
3023: {
3024: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3025:
3026: while (my $configline=<$config>) {
3027: chomp($configline);
3028: if ($configline) {
3029: my ($short,$plain)=split(/:/,$configline);
3030: if ($plain ne '') { $prp{$short}=$plain; }
3031: }
3032: }
3033: }
3034:
3035: # ---------------------------------------------------------- Read package table
3036: {
3037: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3038:
3039: while (my $configline=<$config>) {
3040: chomp($configline);
3041: my ($short,$plain)=split(/:/,$configline);
3042: my ($pack,$name)=split(/\&/,$short);
3043: if ($plain ne '') {
3044: $packagetab{$pack.'&'.$name.'&name'}=$name;
3045: $packagetab{$short}=$plain;
3046: }
3047: }
3048: }
3049:
3050: %metacache=();
3051:
3052: $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
3053: $dumpcount=0;
3054:
3055: &logtouch();
3056: &logthis('<font color=yellow>INFO: Read configuration</font>');
3057: $readit=1;
3058: }
3059: }
3060:
3061: 1;
3062: __END__
3063:
3064: =pod
3065:
3066: =head1 NAME
3067:
3068: Apache::lonnet - Subroutines to ask questions about things in the network.
3069:
3070: =head1 SYNOPSIS
3071:
3072: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3073:
3074: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3075:
3076: Common parameters:
3077:
3078: =over 4
3079:
3080: =item *
3081:
3082: $uname : an internal username (if $cname expecting a course Id specifically)
3083:
3084: =item *
3085:
3086: $udom : a domain (if $cdom expecting a course's domain specifically)
3087:
3088: =item *
3089:
3090: $symb : a resource instance identifier
3091:
3092: =item *
3093:
3094: $namespace : the name of a .db file that contains the data needed or
3095: being set.
3096:
3097: =back
3098:
3099: =head1 INTRODUCTION
3100:
3101: This module provides subroutines which interact with the
3102: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3103: - classes
3104: - users
3105: - resources
3106:
3107: For many of these objects you can also use this to store data about
3108: them or modify them in various ways.
3109:
3110: This is part of the LearningOnline Network with CAPA project
3111: described at http://www.lon-capa.org.
3112:
3113: =head1 RETURN MESSAGES
3114:
3115: =over 4
3116:
3117: =item *
3118:
3119: con_lost : unable to contact remote host
3120:
3121: =item *
3122:
3123: con_delayed : unable to contact remote host, message will be delivered
3124: when the connection is brought back up
3125:
3126: =item *
3127:
3128: con_failed : unable to contact remote host and unable to save message
3129: for later delivery
3130:
3131: =item *
3132:
3133: error: : an error a occured, a description of the error follows the :
3134:
3135: =item *
3136:
3137: no_such_host : unable to fund a host associated with the user/domain
3138: that was requested
3139:
3140: =back
3141:
3142: =head1 PUBLIC SUBROUTINES
3143:
3144: =head2 Session Environment Functions
3145:
3146: =over 4
3147:
3148: =item *
3149:
3150: appenv(%hash) : the value of %hash is written to the user envirnoment
3151: file, and will be restored for each access this user makes during this
3152: session, also modifies the %ENV for the current process
3153:
3154: =item *
3155:
3156: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3157:
3158: =back
3159:
3160: =head2 User Information
3161:
3162: =over 4
3163:
3164: =item *
3165:
3166: queryauthenticate($uname,$udom) : try to determine user's current
3167: authentication scheme
3168:
3169: =item *
3170:
3171: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3172: servers (first use the current one), $upass should be the users password
3173:
3174: =item *
3175:
3176: homeserver($uname,$udom) : find the server which has the user's
3177: directory and files (there must be only one), this caches the answer,
3178: and also caches if there is a borken connection.
3179:
3180: =item *
3181:
3182: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3183: unique resource in a domain, there must be only 1 ID per username, and
3184: only 1 username per ID in a specific domain) (returns hash:
3185: id=>name,id=>name)
3186:
3187: =item *
3188:
3189: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
3190: name=>id,name=>id)
3191:
3192: =item *
3193:
3194: idput($udom,%ids) : store away a list of names and associated IDs
3195:
3196: =item *
3197:
3198: rolesinit($udom,$username,$authhost) : get user privileges
3199:
3200: =item *
3201:
3202: usection($udom,$uname,$cname) : finds the section of student in the
3203: course $cname, return section name/number or '' for "not in course"
3204: and '-1' for "no section"
3205:
3206: =item *
3207:
3208: userenvironment($udom,$uname,@what) : gets the values of the keys
3209: passed in @what from the requested user's environment, returns a hash
3210:
3211: =back
3212:
3213: =head2 User Roles
3214:
3215: =over 4
3216:
3217: =item *
3218:
3219: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
3220: actions
3221: F: full access
3222: U,I,K: authentication modes (cxx only)
3223: '': forbidden
3224: 1: user needs to choose course
3225: 2: browse allowed
3226:
3227: =item *
3228:
3229: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
3230: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
3231: and course level
3232:
3233: =item *
3234:
3235: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
3236: explanation of a user role term
3237:
3238: =back
3239:
3240: =head2 User Modification
3241:
3242: =over 4
3243:
3244: =item *
3245:
3246: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
3247: user for the level given by URL. Optional start and end dates (leave empty
3248: string or zero for "no date")
3249:
3250: =item *
3251:
3252: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
3253: change a users, password, possible return values are: ok,
3254: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
3255: refused
3256:
3257: =item *
3258:
3259: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
3260:
3261: =item *
3262:
3263: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
3264: modify user
3265:
3266: =item *
3267:
3268: modifystudent($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,$end,$start) : modify student
3269:
3270: =item *
3271:
3272: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
3273: custom role; give a custom role to a user for the level given by URL. Specify
3274: name and domain of role author, and role name
3275:
3276: =item *
3277:
3278: revokerole($udom,$uname,$url,$role) : revoke a role for url
3279:
3280: =item *
3281:
3282: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
3283:
3284: =back
3285:
3286: =head2 Course Infomation
3287:
3288: =over 4
3289:
3290: =item *
3291:
3292: coursedescription($courseid) : course description
3293:
3294: =item *
3295:
3296: courseresdata($coursenum,$coursedomain,@which) : request for current
3297: parameter setting for a specific course, @what should be a list of
3298: parameters to ask about. This routine caches answers for 5 minutes.
3299:
3300: =back
3301:
3302: =head2 Course Modification
3303:
3304: =over 4
3305:
3306: =item *
3307:
3308: writecoursepref($courseid,%prefs) : write preferences (environment
3309: database) for a course
3310:
3311: =item *
3312:
3313: createcourse($udom,$description,$url) : make/modify course
3314:
3315: =back
3316:
3317: =head2 Resource Subroutines
3318:
3319: =over 4
3320:
3321: =item *
3322:
3323: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
3324:
3325: =item *
3326:
3327: repcopy($filename) : subscribes to the requested file, and attempts to
3328: replicate from the owning library server, Might return
3329: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
3330: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
3331: resource. Expects the local filesystem pathname
3332: (/home/httpd/html/res/....)
3333:
3334: =back
3335:
3336: =head2 Resource Information
3337:
3338: =over 4
3339:
3340: =item *
3341:
3342: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
3343: a vairety of different possible values, $varname should be a request
3344: string, and the other parameters can be used to specify who and what
3345: one is asking about.
3346:
3347: Possible values for $varname are environment.lastname (or other item
3348: from the envirnment hash), user.name (or someother aspect about the
3349: user), resource.0.maxtries (or some other part and parameter of a
3350: resource)
3351:
3352: =item *
3353:
3354: directcondval($number) : get current value of a condition; reads from a state
3355: string
3356:
3357: =item *
3358:
3359: condval($condidx) : value of condition index based on state
3360:
3361: =item *
3362:
3363: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
3364: resource's metadata, $what should be either a specific key, or either
3365: 'keys' (to get a list of possible keys) or 'packages' to get a list of
3366: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
3367:
3368: this function automatically caches all requests
3369:
3370: =item *
3371:
3372: metadata_query($query,$custom,$customshow) : make a metadata query against the
3373: network of library servers; returns file handle of where SQL and regex results
3374: will be stored for query
3375:
3376: =item *
3377:
3378: symbread($filename) : return symbolic list entry (filename argument optional);
3379: returns the data handle
3380:
3381: =item *
3382:
3383: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
3384: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
3385: failure, user must be in a course, as it assumes the existance of the
3386: course initi hash, and uses $ENV('request.course.id'}
3387:
3388:
3389: =item *
3390:
3391: symbclean($symb) : removes versions numbers from a symb, returns the
3392: cleaned symb
3393:
3394: =item *
3395:
3396: is_on_map($uri) : checks if the $uri is somewhere on the current
3397: course map, user must be in a course for it to work.
3398:
3399: =item *
3400:
3401: numval($salt) : return random seed value (addend for rndseed)
3402:
3403: =item *
3404:
3405: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
3406: a random seed, all arguments are optional, if they aren't sent it uses the
3407: environment to derive them. Note: if symb isn't sent and it can't get one
3408: from &symbread it will use the current time as its return value
3409:
3410: =item *
3411:
3412: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
3413: unfakeable, receipt
3414:
3415: =item *
3416:
3417: receipt() : API to ireceipt working off of ENV values; given out to users
3418:
3419: =item *
3420:
3421: countacc($url) : count the number of accesses to a given URL
3422:
3423: =item *
3424:
3425: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
3426:
3427: =item *
3428:
3429: checkin($token) : updates that a resource has beeen returned (a hard copy version for instance) and returns the data that $token was Checkout with ($symb, $tuname, $tudom, and $tcrsid)
3430:
3431: =item *
3432:
3433: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
3434:
3435: =item *
3436:
3437: devalidate($symb) : devalidate temporary spreadsheet calculations,
3438: forcing spreadsheet to reevaluate the resource scores next time.
3439:
3440: =back
3441:
3442: =head2 Storing/Retreiving Data
3443:
3444: =over 4
3445:
3446: =item *
3447:
3448: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
3449: for this url; hashref needs to be given and should be a \%hashname; the
3450: remaining args aren't required and if they aren't passed or are '' they will
3451: be derived from the ENV
3452:
3453: =item *
3454:
3455: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
3456: uses critical subroutine
3457:
3458: =item *
3459:
3460: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
3461: all args are optional
3462:
3463: =item *
3464:
3465: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
3466: works very similar to store/cstore, but all data is stored in a
3467: temporary location and can be reset using tmpreset, $storehash should
3468: be a hash reference, returns nothing on success
3469:
3470: =item *
3471:
3472: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
3473: similar to restore, but all data is stored in a temporary location and
3474: can be reset using tmpreset. Returns a hash of values on success,
3475: error string otherwise.
3476:
3477: =item *
3478:
3479: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
3480: deltes all keys for $symb form the temporary storage hash.
3481:
3482: =item *
3483:
3484: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
3485: reference filled in from namesp ($udom and $uname are optional)
3486:
3487: =item *
3488:
3489: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
3490: namesp ($udom and $uname are optional)
3491:
3492: =item *
3493:
3494: dump($namespace,$udom,$uname,$regexp) :
3495: dumps the complete (or key matching regexp) namespace into a hash
3496: ($udom, $uname and $regexp are optional)
3497:
3498: =item *
3499:
3500: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
3501: ($udom and $uname are optional)
3502:
3503: =item *
3504:
3505: cput($namespace,$storehash,$udom,$uname) : critical put
3506: ($udom and $uname are optional)
3507:
3508: =item *
3509:
3510: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
3511: reference filled in from namesp (encrypts the return communication)
3512: ($udom and $uname are optional)
3513:
3514: =item *
3515:
3516: log($udom,$name,$home,$message) : write to permanent log for user; use
3517: critical subroutine
3518:
3519: =back
3520:
3521: =head2 Network Status Functions
3522:
3523: =over 4
3524:
3525: =item *
3526:
3527: dirlist($uri) : return directory list based on URI
3528:
3529: =item *
3530:
3531: spareserver() : find server with least workload from spare.tab
3532:
3533: =back
3534:
3535: =head2 Apache Request
3536:
3537: =over 4
3538:
3539: =item *
3540:
3541: ssi($url,%hash) : server side include, does a complete request cycle on url to
3542: localhost, posts hash
3543:
3544: =back
3545:
3546: =head2 Data to String to Data
3547:
3548: =over 4
3549:
3550: =item *
3551:
3552: hash2str(%hash) : convert a hash into a string complete with escaping and '='
3553: and '&' separators, supports elements that are arrayrefs and hashrefs
3554:
3555: =item *
3556:
3557: hashref2str($hashref) : convert a hashref into a string complete with
3558: escaping and '=' and '&' separators, supports elements that are
3559: arrayrefs and hashrefs
3560:
3561: =item *
3562:
3563: arrayref2str($arrayref) : convert an arrayref into a string complete
3564: with escaping and '&' separators, supports elements that are arrayrefs
3565: and hashrefs
3566:
3567: =item *
3568:
3569: str2hash($string) : convert string to hash using unescaping and
3570: splitting on '=' and '&', supports elements that are arrayrefs and
3571: hashrefs
3572:
3573: =item *
3574:
3575: str2array($string) : convert string to hash using unescaping and
3576: splitting on '&', supports elements that are arrayrefs and hashrefs
3577:
3578: =back
3579:
3580: =head2 Logging Routines
3581:
3582: =over 4
3583:
3584: These routines allow one to make log messages in the lonnet.log and
3585: lonnet.perm logfiles.
3586:
3587: =item *
3588:
3589: logtouch() : make sure the logfile, lonnet.log, exists
3590:
3591: =item *
3592:
3593: logthis() : append message to the normal lonnet.log file, it gets
3594: preiodically rolled over and deleted.
3595:
3596: =item *
3597:
3598: logperm() : append a permanent message to lonnet.perm.log, this log
3599: file never gets deleted by any automated portion of the system, only
3600: messages of critical importance should go in here.
3601:
3602: =back
3603:
3604: =head2 General File Helper Routines
3605:
3606: =over 4
3607:
3608: =item *
3609:
3610: getfile($file) : returns the entire contents of a file or -1; it
3611: properly subscribes to and replicates the file if neccessary.
3612:
3613: =item *
3614:
3615: filelocation($dir,$file) : returns file system location of a file
3616: based on URI; meant to be "fairly clean" absolute reference, $dir is a
3617: directory that relative $file lookups are to looked in ($dir of /a/dir
3618: and a file of ../bob will become /a/bob)
3619:
3620: =item *
3621:
3622: hreflocation($dir,$file) : returns file system location or a URL; same as
3623: filelocation except for hrefs
3624:
3625: =item *
3626:
3627: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
3628:
3629: =back
3630:
3631: =head2 HTTP Helper Routines
3632:
3633: =over 4
3634:
3635: =item *
3636:
3637: escape() : unpack non-word characters into CGI-compatible hex codes
3638:
3639: =item *
3640:
3641: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
3642:
3643: =back
3644:
3645: =head1 PRIVATE SUBROUTINES
3646:
3647: =head2 Underlying communication routines (Shouldn't call)
3648:
3649: =over 4
3650:
3651: =item *
3652:
3653: subreply() : tries to pass a message to lonc, returns con_lost if incapable
3654:
3655: =item *
3656:
3657: reply() : uses subreply to send a message to remote machine, logs all failures
3658:
3659: =item *
3660:
3661: critical() : passes a critical message to another server; if cannot
3662: get through then place message in connection buffer directory and
3663: returns con_delayed, if incapable of saving message, returns
3664: con_failed
3665:
3666: =item *
3667:
3668: reconlonc() : tries to reconnect lonc client processes.
3669:
3670: =back
3671:
3672: =head2 Resource Access Logging
3673:
3674: =over 4
3675:
3676: =item *
3677:
3678: flushcourselogs() : flush (save) buffer logs and access logs
3679:
3680: =item *
3681:
3682: courselog($what) : save message for course in hash
3683:
3684: =item *
3685:
3686: courseacclog($what) : save message for course using &courselog(). Perform
3687: special processing for specific resource types (problems, exams, quizzes, etc).
3688:
3689: =item *
3690:
3691: goodbye() : flush course logs and log shutting down; it is called in srm.conf
3692: as a PerlChildExitHandler
3693:
3694: =back
3695:
3696: =head2 Other
3697:
3698: =over 4
3699:
3700: =item *
3701:
3702: symblist($mapname,%newhash) : update symbolic storage links
3703:
3704: =back
3705:
3706: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonnet.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / lonnet / perl