1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.350 2003/03/24 19:57:35 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 3/2 Gerd Kortemeyer
51: # 3/19,3/20 Gerd Kortemeyer
52: # 5/26,5/28 Gerd Kortemeyer
53: # 5/30 H. K. Ng
54: # 6/1 Gerd Kortemeyer
55: # July Guy Albertelli
56: # 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,
57: # 10/2 Gerd Kortemeyer
58: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
59: # 12/5 Matthew Hall
60: # 12/5 Guy Albertelli
61: # 12/6,12/7,12/12 Gerd Kortemeyer
62: # 12/21,12/22,12/27,12/28 Gerd Kortemeyer
63: # YEAR=2002
64: # 1/4,2/4,2/7 Gerd Kortemeyer
65: #
66: ###
67:
68: package Apache::lonnet;
69:
70: use strict;
71: use Apache::File;
72: use LWP::UserAgent();
73: use HTTP::Headers;
74: use vars
75: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
76: %libserv %pr %prp %metacache %packagetab %titlecache
77: %courselogs %accesshash %userrolehash $processmarker $dumpcount
78: %coursedombuf %coursehombuf %courseresdatacache
79: %domaindescription %domain_auth_def %domain_auth_arg_def $tmpdir);
80: use IO::Socket;
81: use GDBM_File;
82: use Apache::Constants qw(:common :http);
83: use HTML::LCParser;
84: use Fcntl qw(:flock);
85: use Apache::loncoursedata;
86:
87: my $readit;
88:
89: # --------------------------------------------------------------------- Logging
90:
91: sub logtouch {
92: my $execdir=$perlvar{'lonDaemons'};
93: unless (-e "$execdir/logs/lonnet.log") {
94: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
95: close $fh;
96: }
97: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
98: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
99: }
100:
101: sub logthis {
102: my $message=shift;
103: my $execdir=$perlvar{'lonDaemons'};
104: my $now=time;
105: my $local=localtime($now);
106: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
107: print $fh "$local ($$): $message\n";
108: return 1;
109: }
110:
111: sub logperm {
112: my $message=shift;
113: my $execdir=$perlvar{'lonDaemons'};
114: my $now=time;
115: my $local=localtime($now);
116: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
117: print $fh "$now:$message:$local\n";
118: return 1;
119: }
120:
121: # -------------------------------------------------- Non-critical communication
122: sub subreply {
123: my ($cmd,$server)=@_;
124: my $peerfile="$perlvar{'lonSockDir'}/$server";
125: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
126: Type => SOCK_STREAM,
127: Timeout => 10)
128: or return "con_lost";
129: print $client "$cmd\n";
130: my $answer=<$client>;
131: if (!$answer) { $answer="con_lost"; }
132: chomp($answer);
133: return $answer;
134: }
135:
136: sub reply {
137: my ($cmd,$server)=@_;
138: unless (defined($hostname{$server})) { return 'no_such_host'; }
139: my $answer=subreply($cmd,$server);
140: if ($answer eq 'con_lost') {
141: #sleep 5;
142: #$answer=subreply($cmd,$server);
143: #if ($answer eq 'con_lost') {
144: # &logthis("Second attempt con_lost on $server");
145: # my $peerfile="$perlvar{'lonSockDir'}/$server";
146: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
147: # Type => SOCK_STREAM,
148: # Timeout => 10)
149: # or return "con_lost";
150: # &logthis("Killing socket");
151: # print $client "close_connection_exit\n";
152: #sleep 5;
153: # $answer=subreply($cmd,$server);
154: #}
155: }
156: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
157: &logthis("<font color=blue>WARNING:".
158: " $cmd to $server returned $answer</font>");
159: }
160: return $answer;
161: }
162:
163: # ----------------------------------------------------------- Send USR1 to lonc
164:
165: sub reconlonc {
166: my $peerfile=shift;
167: &logthis("Trying to reconnect for $peerfile");
168: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
169: if (my $fh=Apache::File->new("$loncfile")) {
170: my $loncpid=<$fh>;
171: chomp($loncpid);
172: if (kill 0 => $loncpid) {
173: &logthis("lonc at pid $loncpid responding, sending USR1");
174: kill USR1 => $loncpid;
175: sleep 1;
176: if (-e "$peerfile") { return; }
177: &logthis("$peerfile still not there, give it another try");
178: sleep 5;
179: if (-e "$peerfile") { return; }
180: &logthis(
181: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
182: } else {
183: &logthis(
184: "<font color=blue>WARNING:".
185: " lonc at pid $loncpid not responding, giving up</font>");
186: }
187: } else {
188: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
189: }
190: }
191:
192: # ------------------------------------------------------ Critical communication
193:
194: sub critical {
195: my ($cmd,$server)=@_;
196: unless ($hostname{$server}) {
197: &logthis("<font color=blue>WARNING:".
198: " Critical message to unknown server ($server)</font>");
199: return 'no_such_host';
200: }
201: my $answer=reply($cmd,$server);
202: if ($answer eq 'con_lost') {
203: my $pingreply=reply('ping',$server);
204: &reconlonc("$perlvar{'lonSockDir'}/$server");
205: my $pongreply=reply('pong',$server);
206: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
207: $answer=reply($cmd,$server);
208: if ($answer eq 'con_lost') {
209: my $now=time;
210: my $middlename=$cmd;
211: $middlename=substr($middlename,0,16);
212: $middlename=~s/\W//g;
213: my $dfilename=
214: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
215: $dumpcount++;
216: {
217: my $dfh;
218: if ($dfh=Apache::File->new(">$dfilename")) {
219: print $dfh "$cmd\n";
220: }
221: }
222: sleep 2;
223: my $wcmd='';
224: {
225: my $dfh;
226: if ($dfh=Apache::File->new("$dfilename")) {
227: $wcmd=<$dfh>;
228: }
229: }
230: chomp($wcmd);
231: if ($wcmd eq $cmd) {
232: &logthis("<font color=blue>WARNING: ".
233: "Connection buffer $dfilename: $cmd</font>");
234: &logperm("D:$server:$cmd");
235: return 'con_delayed';
236: } else {
237: &logthis("<font color=red>CRITICAL:"
238: ." Critical connection failed: $server $cmd</font>");
239: &logperm("F:$server:$cmd");
240: return 'con_failed';
241: }
242: }
243: }
244: return $answer;
245: }
246:
247: # ---------------------------------------------------------- Append Environment
248:
249: sub appenv {
250: my %newenv=@_;
251: foreach (keys %newenv) {
252: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
253: &logthis("<font color=blue>WARNING: ".
254: "Attempt to modify environment ".$_." to ".$newenv{$_}
255: .'</font>');
256: delete($newenv{$_});
257: } else {
258: $ENV{$_}=$newenv{$_};
259: }
260: }
261:
262: my $lockfh;
263: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
264: return 'error: '.$!;
265: }
266: unless (flock($lockfh,LOCK_EX)) {
267: &logthis("<font color=blue>WARNING: ".
268: 'Could not obtain exclusive lock in appenv: '.$!);
269: $lockfh->close();
270: return 'error: '.$!;
271: }
272:
273: my @oldenv;
274: {
275: my $fh;
276: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
277: return 'error: '.$!;
278: }
279: @oldenv=<$fh>;
280: $fh->close();
281: }
282: for (my $i=0; $i<=$#oldenv; $i++) {
283: chomp($oldenv[$i]);
284: if ($oldenv[$i] ne '') {
285: my ($name,$value)=split(/=/,$oldenv[$i]);
286: unless (defined($newenv{$name})) {
287: $newenv{$name}=$value;
288: }
289: }
290: }
291: {
292: my $fh;
293: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
294: return 'error';
295: }
296: my $newname;
297: foreach $newname (keys %newenv) {
298: print $fh "$newname=$newenv{$newname}\n";
299: }
300: $fh->close();
301: }
302:
303: $lockfh->close();
304: return 'ok';
305: }
306: # ----------------------------------------------------- Delete from Environment
307:
308: sub delenv {
309: my $delthis=shift;
310: my %newenv=();
311: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
312: &logthis("<font color=blue>WARNING: ".
313: "Attempt to delete from environment ".$delthis);
314: return 'error';
315: }
316: my @oldenv;
317: {
318: my $fh;
319: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
320: return 'error';
321: }
322: unless (flock($fh,LOCK_SH)) {
323: &logthis("<font color=blue>WARNING: ".
324: 'Could not obtain shared lock in delenv: '.$!);
325: $fh->close();
326: return 'error: '.$!;
327: }
328: @oldenv=<$fh>;
329: $fh->close();
330: }
331: {
332: my $fh;
333: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
334: return 'error';
335: }
336: unless (flock($fh,LOCK_EX)) {
337: &logthis("<font color=blue>WARNING: ".
338: 'Could not obtain exclusive lock in delenv: '.$!);
339: $fh->close();
340: return 'error: '.$!;
341: }
342: foreach (@oldenv) {
343: unless ($_=~/^$delthis/) { print $fh $_; }
344: }
345: $fh->close();
346: }
347: return 'ok';
348: }
349:
350: # ------------------------------------------ Fight off request when overloaded
351:
352: sub overloaderror {
353: my ($r,$checkserver)=@_;
354: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
355: my $loadavg;
356: if ($checkserver eq $perlvar{'lonHostID'}) {
357: my $loadfile=Apache::File->new('/proc/loadavg');
358: $loadavg=<$loadfile>;
359: $loadavg =~ s/\s.*//g;
360: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
361: } else {
362: $loadavg=&reply('load',$checkserver);
363: }
364: my $overload=$loadavg-100;
365: if ($overload>0) {
366: $r->err_headers_out->{'Retry-After'}=$overload;
367: $r->log_error('Overload of '.$overload.' on '.$checkserver);
368: return 413;
369: }
370: return '';
371: }
372:
373: # ------------------------------ Find server with least workload from spare.tab
374:
375: sub spareserver {
376: my $loadpercent = shift;
377: my $tryserver;
378: my $spareserver='';
379: my $lowestserver=$loadpercent;
380: foreach $tryserver (keys %spareid) {
381: my $answer=reply('load',$tryserver);
382: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
383: $spareserver="http://$hostname{$tryserver}";
384: $lowestserver=$answer;
385: }
386: }
387: return $spareserver;
388: }
389:
390: # --------------------------------------------- Try to change a user's password
391:
392: sub changepass {
393: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
394: $currentpass = &escape($currentpass);
395: $newpass = &escape($newpass);
396: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
397: $server);
398: if (! $answer) {
399: &logthis("No reply on password change request to $server ".
400: "by $uname in domain $udom.");
401: } elsif ($answer =~ "^ok") {
402: &logthis("$uname in $udom successfully changed their password ".
403: "on $server.");
404: } elsif ($answer =~ "^pwchange_failure") {
405: &logthis("$uname in $udom was unable to change their password ".
406: "on $server. The action was blocked by either lcpasswd ".
407: "or pwchange");
408: } elsif ($answer =~ "^non_authorized") {
409: &logthis("$uname in $udom did not get their password correct when ".
410: "attempting to change it on $server.");
411: } elsif ($answer =~ "^auth_mode_error") {
412: &logthis("$uname in $udom attempted to change their password despite ".
413: "not being locally or internally authenticated on $server.");
414: } elsif ($answer =~ "^unknown_user") {
415: &logthis("$uname in $udom attempted to change their password ".
416: "on $server but were unable to because $server is not ".
417: "their home server.");
418: } elsif ($answer =~ "^refused") {
419: &logthis("$server refused to change $uname in $udom password because ".
420: "it was sent an unencrypted request to change the password.");
421: }
422: return $answer;
423: }
424:
425: # ----------------------- Try to determine user's current authentication scheme
426:
427: sub queryauthenticate {
428: my ($uname,$udom)=@_;
429: if (($perlvar{'lonRole'} eq 'library') &&
430: ($udom eq $perlvar{'lonDefDomain'})) {
431: my $answer=reply("encrypt:currentauth:$udom:$uname",
432: $perlvar{'lonHostID'});
433: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
434: if (length($answer)) {
435: return $answer;
436: }
437: else {
438: &logthis("User $uname at $udom lacks an authentication mechanism");
439: return 'no_host';
440: }
441: }
442: }
443:
444: my $tryserver;
445: foreach $tryserver (keys %libserv) {
446: if ($hostdom{$tryserver} eq $udom) {
447: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
448: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
449: if (length($answer)) {
450: return $answer;
451: }
452: else {
453: &logthis("User $uname at $udom lacks an authentication mechanism");
454: return 'no_host';
455: }
456: }
457: }
458: }
459: &logthis("User $uname at $udom lacks an authentication mechanism");
460: return 'no_host';
461: }
462:
463: # --------- Try to authenticate user from domain's lib servers (first this one)
464:
465: sub authenticate {
466: my ($uname,$upass,$udom)=@_;
467: $upass=escape($upass);
468: $uname=~s/\W//g;
469: if (($perlvar{'lonRole'} eq 'library') &&
470: ($udom eq $perlvar{'lonDefDomain'})) {
471: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
472: if ($answer =~ /authorized/) {
473: if ($answer eq 'authorized') {
474: &logthis("User $uname at $udom authorized by local server");
475: return $perlvar{'lonHostID'};
476: }
477: if ($answer eq 'non_authorized') {
478: &logthis("User $uname at $udom rejected by local server");
479: return 'no_host';
480: }
481: }
482: }
483:
484: my $tryserver;
485: foreach $tryserver (keys %libserv) {
486: if ($hostdom{$tryserver} eq $udom) {
487: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
488: if ($answer =~ /authorized/) {
489: if ($answer eq 'authorized') {
490: &logthis("User $uname at $udom authorized by $tryserver");
491: return $tryserver;
492: }
493: if ($answer eq 'non_authorized') {
494: &logthis("User $uname at $udom rejected by $tryserver");
495: return 'no_host';
496: }
497: }
498: }
499: }
500: &logthis("User $uname at $udom could not be authenticated");
501: return 'no_host';
502: }
503:
504: # ---------------------- Find the homebase for a user from domain's lib servers
505:
506: sub homeserver {
507: my ($uname,$udom,$ignoreBadCache)=@_;
508: my $index="$uname:$udom";
509: if ($homecache{$index}) {
510: return "$homecache{$index}";
511: }
512: my $tryserver;
513: foreach $tryserver (keys %libserv) {
514: next if ($ignoreBadCache ne 'true' &&
515: exists($badServerCache{$tryserver}));
516: if ($hostdom{$tryserver} eq $udom) {
517: my $answer=reply("home:$udom:$uname",$tryserver);
518: if ($answer eq 'found') {
519: $homecache{$index}=$tryserver;
520: return $tryserver;
521: } elsif ($answer eq 'no_host') {
522: $badServerCache{$tryserver}=1;
523: }
524: }
525: }
526: return 'no_host';
527: }
528:
529: # ------------------------------------- Find the usernames behind a list of IDs
530:
531: sub idget {
532: my ($udom,@ids)=@_;
533: my %returnhash=();
534:
535: my $tryserver;
536: foreach $tryserver (keys %libserv) {
537: if ($hostdom{$tryserver} eq $udom) {
538: my $idlist=join('&',@ids);
539: $idlist=~tr/A-Z/a-z/;
540: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
541: my @answer=();
542: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
543: @answer=split(/\&/,$reply);
544: } ;
545: my $i;
546: for ($i=0;$i<=$#ids;$i++) {
547: if ($answer[$i]) {
548: $returnhash{$ids[$i]}=$answer[$i];
549: }
550: }
551: }
552: }
553: return %returnhash;
554: }
555:
556: # ------------------------------------- Find the IDs behind a list of usernames
557:
558: sub idrget {
559: my ($udom,@unames)=@_;
560: my %returnhash=();
561: foreach (@unames) {
562: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
563: }
564: return %returnhash;
565: }
566:
567: # ------------------------------- Store away a list of names and associated IDs
568:
569: sub idput {
570: my ($udom,%ids)=@_;
571: my %servers=();
572: foreach (keys %ids) {
573: my $uhom=&homeserver($_,$udom);
574: if ($uhom ne 'no_host') {
575: my $id=&escape($ids{$_});
576: $id=~tr/A-Z/a-z/;
577: my $unam=&escape($_);
578: if ($servers{$uhom}) {
579: $servers{$uhom}.='&'.$id.'='.$unam;
580: } else {
581: $servers{$uhom}=$id.'='.$unam;
582: }
583: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
584: }
585: }
586: foreach (keys %servers) {
587: &critical('idput:'.$udom.':'.$servers{$_},$_);
588: }
589: }
590:
591: # --------------------------------------------------- Assign a key to a student
592:
593: sub assign_access_key {
594: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
595: $cdom=
596: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
597: $cnum=
598: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
599: $udom=$ENV{'user.name'} unless (defined($udom));
600: $uname=$ENV{'user.domain'} unless (defined($uname));
601: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
602: if (($existing{$ckey}=~/^\d+$/) || # has time - new key
603: ($existing{$ckey} eq $uname.':'.$udom)) { # this should not happen,
604: # unless something went wrong
605: # the first time around
606: # ready to assign
607: } elsif (!$existing{$ckey}) {
608: if (&put('accesskey',{$ckey=>$uname.':'.$udom},$cdom,$cnum) eq 'ok') {
609: # key now belongs to user
610: my $envkey='key.'.$cdom.'_'.$cnum;
611: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
612: &appenv('environment.'.$envkey => $ckey);
613: return 'ok';
614: } else {
615: return
616: 'error: Count not permanently assign key, will need to be re-entered later.';
617: }
618: } else {
619: return 'error: Could not assign key, try again later.';
620: }
621: # the key does not exist
622: return 'error: The key does not exist';
623: } else {
624: # the key is somebody else's
625: return 'error: The key is already in use';
626: }
627: }
628:
629: # ------------------------------------------------------ Generate a set of keys
630:
631: sub generate_access_keys {
632: my ($number,$cdom,$cnum)=@_;
633: $cdom=
634: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
635: $cnum=
636: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
637: unless (&allowed('ccc',$cdom)) { return 0; }
638: unless (($cdom) && ($cnum)) { return 0; }
639: if ($number>10000) { return 0; }
640: sleep(2); # make sure don't get same seed twice
641: srand(time()^($$+($$<<15))); # from "Programming Perl"
642: my $total=0;
643: for (my $i=1;$i<=$number;$i++) {
644: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
645: sprintf("%lx",int(100000*rand)).'-'.
646: sprintf("%lx",int(100000*rand));
647: $newkey=~s/1/g/g; # folks mix up 1 and l
648: $newkey=~s/0/h/g; # and also 0 and O
649: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
650: if ($existing{$newkey}) {
651: $i--;
652: } else {
653: if (&put('accesskeys',{ $newkey => time() },$cdom,$cnum) eq 'ok') {
654: $total++;
655: }
656: }
657: }
658: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
659: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
660: return $total;
661: }
662:
663: # ------------------------------------------------------- Validate an accesskey
664:
665: sub validate_access_key {
666: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
667: $cdom=
668: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
669: $cnum=
670: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
671: $udom=$ENV{'user.name'} unless (defined($udom));
672: $uname=$ENV{'user.domain'} unless (defined($uname));
673: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
674: return ($existing{$ckey} eq $uname.':'.$udom);
675: }
676:
677: # ------------------------------------- Find the section of student in a course
678:
679: sub getsection {
680: my ($udom,$unam,$courseid)=@_;
681: $courseid=~s/\_/\//g;
682: $courseid=~s/^(\w)/\/$1/;
683: my %Pending;
684: my %Expired;
685: #
686: # Each role can either have not started yet (pending), be active,
687: # or have expired.
688: #
689: # If there is an active role, we are done.
690: #
691: # If there is more than one role which has not started yet,
692: # choose the one which will start sooner
693: # If there is one role which has not started yet, return it.
694: #
695: # If there is more than one expired role, choose the one which ended last.
696: # If there is a role which has expired, return it.
697: #
698: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
699: &homeserver($unam,$udom)))) {
700: my ($key,$value)=split(/\=/,$_);
701: $key=&unescape($key);
702: next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
703: my $section=$1;
704: if ($key eq $courseid.'_st') { $section=''; }
705: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
706: my $now=time;
707: if (defined($end) && ($now > $end)) {
708: $Expired{$end}=$section;
709: next;
710: }
711: if (defined($start) && ($now < $start)) {
712: $Pending{$start}=$section;
713: next;
714: }
715: return $section;
716: }
717: #
718: # Presumedly there will be few matching roles from the above
719: # loop and the sorting time will be negligible.
720: if (scalar(keys(%Pending))) {
721: my ($time) = sort {$a <=> $b} keys(%Pending);
722: return $Pending{$time};
723: }
724: if (scalar(keys(%Expired))) {
725: my @sorted = sort {$a <=> $b} keys(%Expired);
726: my $time = pop(@sorted);
727: return $Expired{$time};
728: }
729: return '-1';
730: }
731:
732: sub usection {
733: my ($udom,$unam,$courseid)=@_;
734: $courseid=~s/\_/\//g;
735: $courseid=~s/^(\w)/\/$1/;
736: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
737: &homeserver($unam,$udom)))) {
738: my ($key,$value)=split(/\=/,$_);
739: $key=&unescape($key);
740: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
741: my $section=$1;
742: if ($key eq $courseid.'_st') { $section=''; }
743: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
744: my $now=time;
745: my $notactive=0;
746: if ($start) {
747: if ($now<$start) { $notactive=1; }
748: }
749: if ($end) {
750: if ($now>$end) { $notactive=1; }
751: }
752: unless ($notactive) { return $section; }
753: }
754: }
755: return '-1';
756: }
757:
758: # ------------------------------------- Read an entry from a user's environment
759:
760: sub userenvironment {
761: my ($udom,$unam,@what)=@_;
762: my %returnhash=();
763: my @answer=split(/\&/,
764: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
765: &homeserver($unam,$udom)));
766: my $i;
767: for ($i=0;$i<=$#what;$i++) {
768: $returnhash{$what[$i]}=&unescape($answer[$i]);
769: }
770: return %returnhash;
771: }
772:
773: # -------------------------------------------------------------------- New chat
774:
775: sub chatsend {
776: my ($newentry,$anon)=@_;
777: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
778: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
779: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
780: &reply('chatsend:'.$cdom.':'.$cnum.':'.
781: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
782: &escape($newentry)),$chome);
783: }
784:
785: # ------------------------------------------ Find current version of a resource
786:
787: sub getversion {
788: my $fname=&clutter(shift);
789: unless ($fname=~/^\/res\//) { return -1; }
790: return ¤tversion(&filelocation('',$fname));
791: }
792:
793: sub currentversion {
794: my $fname=shift;
795: my $author=$fname;
796: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
797: my ($udom,$uname)=split(/\//,$author);
798: my $home=homeserver($uname,$udom);
799: if ($home eq 'no_host') {
800: return -1;
801: }
802: my $answer=reply("currentversion:$fname",$home);
803: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
804: return -1;
805: }
806: return $answer;
807: }
808:
809: # ----------------------------- Subscribe to a resource, return URL if possible
810:
811: sub subscribe {
812: my $fname=shift;
813: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
814: my $author=$fname;
815: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
816: my ($udom,$uname)=split(/\//,$author);
817: my $home=homeserver($uname,$udom);
818: if ($home eq 'no_host') {
819: return 'not_found';
820: }
821: my $answer=reply("sub:$fname",$home);
822: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
823: $answer.=' by '.$home;
824: }
825: return $answer;
826: }
827:
828: # -------------------------------------------------------------- Replicate file
829:
830: sub repcopy {
831: my $filename=shift;
832: $filename=~s/\/+/\//g;
833: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
834: my $transname="$filename.in.transfer";
835: if ((-e $filename) || (-e $transname)) { return OK; }
836: my $remoteurl=subscribe($filename);
837: if ($remoteurl =~ /^con_lost by/) {
838: &logthis("Subscribe returned $remoteurl: $filename");
839: return HTTP_SERVICE_UNAVAILABLE;
840: } elsif ($remoteurl eq 'not_found') {
841: &logthis("Subscribe returned not_found: $filename");
842: return HTTP_NOT_FOUND;
843: } elsif ($remoteurl =~ /^rejected by/) {
844: &logthis("Subscribe returned $remoteurl: $filename");
845: return FORBIDDEN;
846: } elsif ($remoteurl eq 'directory') {
847: return OK;
848: } else {
849: my $author=$filename;
850: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
851: my ($udom,$uname)=split(/\//,$author);
852: my $home=homeserver($uname,$udom);
853: unless ($home eq $perlvar{'lonHostID'}) {
854: my @parts=split(/\//,$filename);
855: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
856: if ($path ne "$perlvar{'lonDocRoot'}/res") {
857: &logthis("Malconfiguration for replication: $filename");
858: return HTTP_BAD_REQUEST;
859: }
860: my $count;
861: for ($count=5;$count<$#parts;$count++) {
862: $path.="/$parts[$count]";
863: if ((-e $path)!=1) {
864: mkdir($path,0777);
865: }
866: }
867: my $ua=new LWP::UserAgent;
868: my $request=new HTTP::Request('GET',"$remoteurl");
869: my $response=$ua->request($request,$transname);
870: if ($response->is_error()) {
871: unlink($transname);
872: my $message=$response->status_line;
873: &logthis("<font color=blue>WARNING:"
874: ." LWP get: $message: $filename</font>");
875: return HTTP_SERVICE_UNAVAILABLE;
876: } else {
877: if ($remoteurl!~/\.meta$/) {
878: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
879: my $mresponse=$ua->request($mrequest,$filename.'.meta');
880: if ($mresponse->is_error()) {
881: unlink($filename.'.meta');
882: &logthis(
883: "<font color=yellow>INFO: No metadata: $filename</font>");
884: }
885: }
886: rename($transname,$filename);
887: return OK;
888: }
889: }
890: }
891: }
892:
893: # ------------------------------------------------ Get server side include body
894: sub ssi_body {
895: my $filelink=shift;
896: my $output=($filelink=~/^http\:/?&externalssi($filelink):
897: &ssi($filelink));
898: $output=~s/^.*\<body[^\>]*\>//si;
899: $output=~s/\<\/body\s*\>.*$//si;
900: $output=~
901: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
902: return $output;
903: }
904:
905: # --------------------------------------------------------- Server Side Include
906:
907: sub ssi {
908:
909: my ($fn,%form)=@_;
910:
911: my $ua=new LWP::UserAgent;
912:
913: my $request;
914:
915: if (%form) {
916: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
917: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
918: } else {
919: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
920: }
921:
922: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
923: my $response=$ua->request($request);
924:
925: return $response->content;
926: }
927:
928: sub externalssi {
929: my ($url)=@_;
930: my $ua=new LWP::UserAgent;
931: my $request=new HTTP::Request('GET',$url);
932: my $response=$ua->request($request);
933: return $response->content;
934: }
935:
936: # ------- Add a token to a remote URI's query string to vouch for access rights
937:
938: sub tokenwrapper {
939: my $uri=shift;
940: $uri=~s/^http\:\/\/([^\/]+)//;
941: $uri=~s/^\///;
942: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
943: my $token=$1;
944: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
945: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
946: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
947: (($uri=~/\?/)?'&':'?').'token='.$token.
948: '&tokenissued='.$perlvar{'lonHostID'};
949: } else {
950: return '/adm/notfound.html';
951: }
952: }
953:
954: # --------------- Take an uploaded file and put it into the userfiles directory
955: # input: name of form element, coursedoc=1 means this is for the course
956: # output: url of file in userspace
957:
958: sub userfileupload {
959: my ($formname,$coursedoc)=@_;
960: my $fname=$ENV{'form.'.$formname.'.filename'};
961: # Replace Windows backslashes by forward slashes
962: $fname=~s/\\/\//g;
963: # Get rid of everything but the actual filename
964: $fname=~s/^.*\/([^\/]+)$/$1/;
965: # Replace spaces by underscores
966: $fname=~s/\s+/\_/g;
967: # Replace all other weird characters by nothing
968: $fname=~s/[^\w\.\-]//g;
969: # See if there is anything left
970: unless ($fname) { return 'error: no uploaded file'; }
971: chop($ENV{'form.'.$formname});
972: # Create the directory if not present
973: my $docuname='';
974: my $docudom='';
975: my $docuhome='';
976: if ($coursedoc) {
977: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
978: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
979: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
980: } else {
981: $docuname=$ENV{'user.name'};
982: $docudom=$ENV{'user.domain'};
983: $docuhome=$ENV{'user.home'};
984: }
985: return
986: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
987: }
988:
989: sub finishuserfileupload {
990: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
991: my $path=$docudom.'/'.$docuname.'/';
992: my $filepath=$perlvar{'lonDocRoot'};
993: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
994: my $count;
995: for ($count=4;$count<=$#parts;$count++) {
996: $filepath.="/$parts[$count]";
997: if ((-e $filepath)!=1) {
998: mkdir($filepath,0777);
999: }
1000: }
1001: # Save the file
1002: {
1003: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
1004: print $fh $ENV{'form.'.$formname};
1005: }
1006: # Notify homeserver to grep it
1007: #
1008:
1009: my $fetchresult=
1010: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
1011: if ($fetchresult eq 'ok') {
1012: #
1013: # Return the URL to it
1014: return '/uploaded/'.$path.$fname;
1015: } else {
1016: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1017: ' to host '.$docuhome.': '.$fetchresult);
1018: return '/adm/notfound.html';
1019: }
1020: }
1021:
1022: # ------------------------------------------------------------------------- Log
1023:
1024: sub log {
1025: my ($dom,$nam,$hom,$what)=@_;
1026: return critical("log:$dom:$nam:$what",$hom);
1027: }
1028:
1029: # ------------------------------------------------------------------ Course Log
1030:
1031: sub flushcourselogs {
1032: &logthis('Flushing course log buffers');
1033: foreach (keys %courselogs) {
1034: my $crsid=$_;
1035: if (&reply('log:'.$coursedombuf{$crsid}.':'.
1036: &escape($courselogs{$crsid}),
1037: $coursehombuf{$crsid}) eq 'ok') {
1038: delete $courselogs{$crsid};
1039: } else {
1040: &logthis('Failed to flush log buffer for '.$crsid);
1041: if (length($courselogs{$crsid})>40000) {
1042: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1043: " exceeded maximum size, deleting.</font>");
1044: delete $courselogs{$crsid};
1045: }
1046: }
1047: }
1048: &logthis('Flushing access logs');
1049: foreach (keys %accesshash) {
1050: my $entry=$_;
1051: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
1052: my %temphash=($entry => $accesshash{$entry});
1053: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
1054: delete $accesshash{$entry};
1055: }
1056: }
1057: &logthis('Flushing role logs');
1058: foreach (keys %userrolehash) {
1059: my $entry=$_;
1060: my ($role,$uname,$udom,$runame,$rudom)=
1061: split(/\:/,$entry);
1062: if (&Apache::lonnet::put('nohist_userroles',
1063: { $role.':'.$uname.':'.$udom => $userrolehash{$entry} },
1064: $rudom,$runame) eq 'ok') {
1065: delete $userrolehash{$entry};
1066: }
1067: }
1068: $dumpcount++;
1069: }
1070:
1071: sub courselog {
1072: my $what=shift;
1073: $what=time.':'.$what;
1074: unless ($ENV{'request.course.id'}) { return ''; }
1075: $coursedombuf{$ENV{'request.course.id'}}=
1076: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
1077: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1078: $coursehombuf{$ENV{'request.course.id'}}=
1079: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1080: if (defined $courselogs{$ENV{'request.course.id'}}) {
1081: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1082: } else {
1083: $courselogs{$ENV{'request.course.id'}}.=$what;
1084: }
1085: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1086: &flushcourselogs();
1087: }
1088: }
1089:
1090: sub courseacclog {
1091: my $fnsymb=shift;
1092: unless ($ENV{'request.course.id'}) { return ''; }
1093: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1094: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
1095: $what.=':POST';
1096: foreach (keys %ENV) {
1097: if ($_=~/^form\.(.*)/) {
1098: $what.=':'.$1.'='.$ENV{$_};
1099: }
1100: }
1101: }
1102: &courselog($what);
1103: }
1104:
1105: sub countacc {
1106: my $url=&declutter(shift);
1107: unless ($ENV{'request.course.id'}) { return ''; }
1108: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1109: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1110: if (defined($accesshash{$key})) {
1111: $accesshash{$key}++;
1112: } else {
1113: $accesshash{$key}=1;
1114: }
1115: }
1116:
1117: sub userrolelog {
1118: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1119: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1120: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1121: ($trole=~/^cr/)) {
1122: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1123: $userrolehash
1124: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1125: =$tend.':'.$tstart;
1126: }
1127: }
1128: # ----------------------------------------------------------- Check out an item
1129:
1130: sub checkout {
1131: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1132: my $now=time;
1133: my $lonhost=$perlvar{'lonHostID'};
1134: my $infostr=&escape(
1135: 'CHECKOUTTOKEN&'.
1136: $tuname.'&'.
1137: $tudom.'&'.
1138: $tcrsid.'&'.
1139: $symb.'&'.
1140: $now.'&'.$ENV{'REMOTE_ADDR'});
1141: my $token=&reply('tmpput:'.$infostr,$lonhost);
1142: if ($token=~/^error\:/) {
1143: &logthis("<font color=blue>WARNING: ".
1144: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1145: "</font>");
1146: return '';
1147: }
1148:
1149: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1150: $token=~tr/a-z/A-Z/;
1151:
1152: my %infohash=('resource.0.outtoken' => $token,
1153: 'resource.0.checkouttime' => $now,
1154: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1155:
1156: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1157: return '';
1158: } else {
1159: &logthis("<font color=blue>WARNING: ".
1160: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1161: "</font>");
1162: }
1163:
1164: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1165: &escape('Checkout '.$infostr.' - '.
1166: $token)) ne 'ok') {
1167: return '';
1168: } else {
1169: &logthis("<font color=blue>WARNING: ".
1170: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1171: "</font>");
1172: }
1173: return $token;
1174: }
1175:
1176: # ------------------------------------------------------------ Check in an item
1177:
1178: sub checkin {
1179: my $token=shift;
1180: my $now=time;
1181: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1182: $lonhost=~tr/A-Z/a-z/;
1183: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1184: $dtoken=~s/\W/\_/g;
1185: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1186: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1187:
1188: unless (($tuname) && ($tudom)) {
1189: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1190: return '';
1191: }
1192:
1193: unless (&allowed('mgr',$tcrsid)) {
1194: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1195: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1196: return '';
1197: }
1198:
1199: my %infohash=('resource.0.intoken' => $token,
1200: 'resource.0.checkintime' => $now,
1201: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1202:
1203: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1204: return '';
1205: }
1206:
1207: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1208: &escape('Checkin - '.$token)) ne 'ok') {
1209: return '';
1210: }
1211:
1212: return ($symb,$tuname,$tudom,$tcrsid);
1213: }
1214:
1215: # --------------------------------------------- Set Expire Date for Spreadsheet
1216:
1217: sub expirespread {
1218: my ($uname,$udom,$stype,$usymb)=@_;
1219: my $cid=$ENV{'request.course.id'};
1220: if ($cid) {
1221: my $now=time;
1222: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1223: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1224: $ENV{'course.'.$cid.'.num'}.
1225: ':nohist_expirationdates:'.
1226: &escape($key).'='.$now,
1227: $ENV{'course.'.$cid.'.home'})
1228: }
1229: return 'ok';
1230: }
1231:
1232: # ----------------------------------------------------- Devalidate Spreadsheets
1233:
1234: sub devalidate {
1235: my ($symb,$uname,$udom)=@_;
1236: my $cid=$ENV{'request.course.id'};
1237: if ($cid) {
1238: # delete the stored spreadsheets for
1239: # - the student level sheet of this user in course's homespace
1240: # - the assessment level sheet for this resource
1241: # for this user in user's homespace
1242: my $key=$uname.':'.$udom.':';
1243: my $status=
1244: &del('nohist_calculatedsheets',
1245: [$key.'studentcalc'],
1246: $ENV{'course.'.$cid.'.domain'},
1247: $ENV{'course.'.$cid.'.num'})
1248: .' '.
1249: &del('nohist_calculatedsheets_'.$cid,
1250: [$key.'assesscalc:'.$symb]);
1251: unless ($status eq 'ok ok') {
1252: &logthis('Could not devalidate spreadsheet '.
1253: $uname.' at '.$udom.' for '.
1254: $symb.': '.$status);
1255: }
1256: }
1257: }
1258:
1259: sub get_scalar {
1260: my ($string,$end) = @_;
1261: my $value;
1262: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1263: $value = $1;
1264: } elsif ($$string =~ s/^([^&]*?)&//) {
1265: $value = $1;
1266: }
1267: return &unescape($value);
1268: }
1269:
1270: sub array2str {
1271: my (@array) = @_;
1272: my $result=&arrayref2str(\@array);
1273: $result=~s/^__ARRAY_REF__//;
1274: $result=~s/__END_ARRAY_REF__$//;
1275: return $result;
1276: }
1277:
1278: sub arrayref2str {
1279: my ($arrayref) = @_;
1280: my $result='__ARRAY_REF__';
1281: foreach my $elem (@$arrayref) {
1282: if(ref($elem) eq 'ARRAY') {
1283: $result.=&arrayref2str($elem).'&';
1284: } elsif(ref($elem) eq 'HASH') {
1285: $result.=&hashref2str($elem).'&';
1286: } elsif(ref($elem)) {
1287: #print("Got a ref of ".(ref($elem))." skipping.");
1288: } else {
1289: $result.=&escape($elem).'&';
1290: }
1291: }
1292: $result=~s/\&$//;
1293: $result .= '__END_ARRAY_REF__';
1294: return $result;
1295: }
1296:
1297: sub hash2str {
1298: my (%hash) = @_;
1299: my $result=&hashref2str(\%hash);
1300: $result=~s/^__HASH_REF__//;
1301: $result=~s/__END_HASH_REF__$//;
1302: return $result;
1303: }
1304:
1305: sub hashref2str {
1306: my ($hashref)=@_;
1307: my $result='__HASH_REF__';
1308: foreach (keys(%$hashref)) {
1309: if (ref($_) eq 'ARRAY') {
1310: $result.=&arrayref2str($_).'=';
1311: } elsif (ref($_) eq 'HASH') {
1312: $result.=&hashref2str($_).'=';
1313: } elsif (ref($_)) {
1314: $result.='=';
1315: #print("Got a ref of ".(ref($_))." skipping.");
1316: } else {
1317: if ($_) {$result.=&escape($_).'=';} else { last; }
1318: }
1319:
1320: if(ref($hashref->{$_}) eq 'ARRAY') {
1321: $result.=&arrayref2str($hashref->{$_}).'&';
1322: } elsif(ref($hashref->{$_}) eq 'HASH') {
1323: $result.=&hashref2str($hashref->{$_}).'&';
1324: } elsif(ref($hashref->{$_})) {
1325: $result.='&';
1326: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1327: } else {
1328: $result.=&escape($hashref->{$_}).'&';
1329: }
1330: }
1331: $result=~s/\&$//;
1332: $result .= '__END_HASH_REF__';
1333: return $result;
1334: }
1335:
1336: sub str2hash {
1337: my ($string)=@_;
1338: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1339: return %$hash;
1340: }
1341:
1342: sub str2hashref {
1343: my ($string) = @_;
1344:
1345: my %hash;
1346:
1347: if($string !~ /^__HASH_REF__/) {
1348: if (! ($string eq '' || !defined($string))) {
1349: $hash{'error'}='Not hash reference';
1350: }
1351: return (\%hash, $string);
1352: }
1353:
1354: $string =~ s/^__HASH_REF__//;
1355:
1356: while($string !~ /^__END_HASH_REF__/) {
1357: #key
1358: my $key='';
1359: if($string =~ /^__HASH_REF__/) {
1360: ($key, $string)=&str2hashref($string);
1361: if(defined($key->{'error'})) {
1362: $hash{'error'}='Bad data';
1363: return (\%hash, $string);
1364: }
1365: } elsif($string =~ /^__ARRAY_REF__/) {
1366: ($key, $string)=&str2arrayref($string);
1367: if($key->[0] eq 'Array reference error') {
1368: $hash{'error'}='Bad data';
1369: return (\%hash, $string);
1370: }
1371: } else {
1372: $string =~ s/^(.*?)=//;
1373: $key=&unescape($1);
1374: }
1375: $string =~ s/^=//;
1376:
1377: #value
1378: my $value='';
1379: if($string =~ /^__HASH_REF__/) {
1380: ($value, $string)=&str2hashref($string);
1381: if(defined($value->{'error'})) {
1382: $hash{'error'}='Bad data';
1383: return (\%hash, $string);
1384: }
1385: } elsif($string =~ /^__ARRAY_REF__/) {
1386: ($value, $string)=&str2arrayref($string);
1387: if($value->[0] eq 'Array reference error') {
1388: $hash{'error'}='Bad data';
1389: return (\%hash, $string);
1390: }
1391: } else {
1392: $value=&get_scalar(\$string,'__END_HASH_REF__');
1393: }
1394: $string =~ s/^&//;
1395:
1396: $hash{$key}=$value;
1397: }
1398:
1399: $string =~ s/^__END_HASH_REF__//;
1400:
1401: return (\%hash, $string);
1402: }
1403:
1404: sub str2array {
1405: my ($string)=@_;
1406: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1407: return @$array;
1408: }
1409:
1410: sub str2arrayref {
1411: my ($string) = @_;
1412: my @array;
1413:
1414: if($string !~ /^__ARRAY_REF__/) {
1415: if (! ($string eq '' || !defined($string))) {
1416: $array[0]='Array reference error';
1417: }
1418: return (\@array, $string);
1419: }
1420:
1421: $string =~ s/^__ARRAY_REF__//;
1422:
1423: while($string !~ /^__END_ARRAY_REF__/) {
1424: my $value='';
1425: if($string =~ /^__HASH_REF__/) {
1426: ($value, $string)=&str2hashref($string);
1427: if(defined($value->{'error'})) {
1428: $array[0] ='Array reference error';
1429: return (\@array, $string);
1430: }
1431: } elsif($string =~ /^__ARRAY_REF__/) {
1432: ($value, $string)=&str2arrayref($string);
1433: if($value->[0] eq 'Array reference error') {
1434: $array[0] ='Array reference error';
1435: return (\@array, $string);
1436: }
1437: } else {
1438: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1439: }
1440: $string =~ s/^&//;
1441:
1442: push(@array, $value);
1443: }
1444:
1445: $string =~ s/^__END_ARRAY_REF__//;
1446:
1447: return (\@array, $string);
1448: }
1449:
1450: # -------------------------------------------------------------------Temp Store
1451:
1452: sub tmpreset {
1453: my ($symb,$namespace,$domain,$stuname) = @_;
1454: if (!$symb) {
1455: $symb=&symbread();
1456: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1457: }
1458: $symb=escape($symb);
1459:
1460: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1461: $namespace=~s/\//\_/g;
1462: $namespace=~s/\W//g;
1463:
1464: #FIXME needs to do something for /pub resources
1465: if (!$domain) { $domain=$ENV{'user.domain'}; }
1466: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1467: my $path=$perlvar{'lonDaemons'}.'/tmp';
1468: my %hash;
1469: if (tie(%hash,'GDBM_File',
1470: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1471: &GDBM_WRCREAT(),0640)) {
1472: foreach my $key (keys %hash) {
1473: if ($key=~ /:$symb/) {
1474: delete($hash{$key});
1475: }
1476: }
1477: }
1478: }
1479:
1480: sub tmpstore {
1481: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1482:
1483: if (!$symb) {
1484: $symb=&symbread();
1485: if (!$symb) { $symb= $ENV{'request.url'}; }
1486: }
1487: $symb=escape($symb);
1488:
1489: if (!$namespace) {
1490: # I don't think we would ever want to store this for a course.
1491: # it seems this will only be used if we don't have a course.
1492: #$namespace=$ENV{'request.course.id'};
1493: #if (!$namespace) {
1494: $namespace=$ENV{'request.state'};
1495: #}
1496: }
1497: $namespace=~s/\//\_/g;
1498: $namespace=~s/\W//g;
1499: #FIXME needs to do something for /pub resources
1500: if (!$domain) { $domain=$ENV{'user.domain'}; }
1501: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1502: my $now=time;
1503: my %hash;
1504: my $path=$perlvar{'lonDaemons'}.'/tmp';
1505: if (tie(%hash,'GDBM_File',
1506: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1507: &GDBM_WRCREAT(),0640)) {
1508: $hash{"version:$symb"}++;
1509: my $version=$hash{"version:$symb"};
1510: my $allkeys='';
1511: foreach my $key (keys(%$storehash)) {
1512: $allkeys.=$key.':';
1513: $hash{"$version:$symb:$key"}=$$storehash{$key};
1514: }
1515: $hash{"$version:$symb:timestamp"}=$now;
1516: $allkeys.='timestamp';
1517: $hash{"$version:keys:$symb"}=$allkeys;
1518: if (untie(%hash)) {
1519: return 'ok';
1520: } else {
1521: return "error:$!";
1522: }
1523: } else {
1524: return "error:$!";
1525: }
1526: }
1527:
1528: # -----------------------------------------------------------------Temp Restore
1529:
1530: sub tmprestore {
1531: my ($symb,$namespace,$domain,$stuname) = @_;
1532:
1533: if (!$symb) {
1534: $symb=&symbread();
1535: if (!$symb) { $symb= $ENV{'request.url'}; }
1536: }
1537: $symb=escape($symb);
1538:
1539: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1540: #FIXME needs to do something for /pub resources
1541: if (!$domain) { $domain=$ENV{'user.domain'}; }
1542: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1543:
1544: my %returnhash;
1545: $namespace=~s/\//\_/g;
1546: $namespace=~s/\W//g;
1547: my %hash;
1548: my $path=$perlvar{'lonDaemons'}.'/tmp';
1549: if (tie(%hash,'GDBM_File',
1550: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1551: &GDBM_READER(),0640)) {
1552: my $version=$hash{"version:$symb"};
1553: $returnhash{'version'}=$version;
1554: my $scope;
1555: for ($scope=1;$scope<=$version;$scope++) {
1556: my $vkeys=$hash{"$scope:keys:$symb"};
1557: my @keys=split(/:/,$vkeys);
1558: my $key;
1559: $returnhash{"$scope:keys"}=$vkeys;
1560: foreach $key (@keys) {
1561: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1562: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1563: }
1564: }
1565: if (!(untie(%hash))) {
1566: return "error:$!";
1567: }
1568: } else {
1569: return "error:$!";
1570: }
1571: return %returnhash;
1572: }
1573:
1574: # ----------------------------------------------------------------------- Store
1575:
1576: sub store {
1577: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1578: my $home='';
1579:
1580: if ($stuname) { $home=&homeserver($stuname,$domain); }
1581:
1582: $symb=&symbclean($symb);
1583: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1584:
1585: if (!$domain) { $domain=$ENV{'user.domain'}; }
1586: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1587:
1588: &devalidate($symb,$stuname,$domain);
1589:
1590: $symb=escape($symb);
1591: if (!$namespace) {
1592: unless ($namespace=$ENV{'request.course.id'}) {
1593: return '';
1594: }
1595: }
1596: if (!$home) { $home=$ENV{'user.home'}; }
1597: my $namevalue='';
1598: foreach (keys %$storehash) {
1599: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1600: }
1601: $namevalue=~s/\&$//;
1602: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1603: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1604: }
1605:
1606: # -------------------------------------------------------------- Critical Store
1607:
1608: sub cstore {
1609: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1610: my $home='';
1611:
1612: if ($stuname) { $home=&homeserver($stuname,$domain); }
1613:
1614: $symb=&symbclean($symb);
1615: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1616:
1617: if (!$domain) { $domain=$ENV{'user.domain'}; }
1618: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1619:
1620: &devalidate($symb,$stuname,$domain);
1621:
1622: $symb=escape($symb);
1623: if (!$namespace) {
1624: unless ($namespace=$ENV{'request.course.id'}) {
1625: return '';
1626: }
1627: }
1628: if (!$home) { $home=$ENV{'user.home'}; }
1629:
1630: my $namevalue='';
1631: foreach (keys %$storehash) {
1632: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1633: }
1634: $namevalue=~s/\&$//;
1635: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1636: return critical
1637: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1638: }
1639:
1640: # --------------------------------------------------------------------- Restore
1641:
1642: sub restore {
1643: my ($symb,$namespace,$domain,$stuname) = @_;
1644: my $home='';
1645:
1646: if ($stuname) { $home=&homeserver($stuname,$domain); }
1647:
1648: if (!$symb) {
1649: unless ($symb=escape(&symbread())) { return ''; }
1650: } else {
1651: $symb=&escape(&symbclean($symb));
1652: }
1653: if (!$namespace) {
1654: unless ($namespace=$ENV{'request.course.id'}) {
1655: return '';
1656: }
1657: }
1658: if (!$domain) { $domain=$ENV{'user.domain'}; }
1659: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1660: if (!$home) { $home=$ENV{'user.home'}; }
1661: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1662:
1663: my %returnhash=();
1664: foreach (split(/\&/,$answer)) {
1665: my ($name,$value)=split(/\=/,$_);
1666: $returnhash{&unescape($name)}=&unescape($value);
1667: }
1668: my $version;
1669: for ($version=1;$version<=$returnhash{'version'};$version++) {
1670: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1671: $returnhash{$_}=$returnhash{$version.':'.$_};
1672: }
1673: }
1674: return %returnhash;
1675: }
1676:
1677: # ---------------------------------------------------------- Course Description
1678:
1679: sub coursedescription {
1680: my $courseid=shift;
1681: $courseid=~s/^\///;
1682: $courseid=~s/\_/\//g;
1683: my ($cdomain,$cnum)=split(/\//,$courseid);
1684: my $chome=&homeserver($cnum,$cdomain);
1685: my $normalid=$cdomain.'_'.$cnum;
1686: # need to always cache even if we get errors otherwise we keep
1687: # trying and trying and trying to get the course description.
1688: my %envhash=();
1689: my %returnhash=();
1690: $envhash{'course.'.$normalid.'.last_cache'}=time;
1691: if ($chome ne 'no_host') {
1692: %returnhash=&dump('environment',$cdomain,$cnum);
1693: if (!exists($returnhash{'con_lost'})) {
1694: $returnhash{'home'}= $chome;
1695: $returnhash{'domain'} = $cdomain;
1696: $returnhash{'num'} = $cnum;
1697: while (my ($name,$value) = each %returnhash) {
1698: $envhash{'course.'.$normalid.'.'.$name}=$value;
1699: }
1700: $returnhash{'url'}=&clutter($returnhash{'url'});
1701: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1702: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1703: $envhash{'course.'.$normalid.'.home'}=$chome;
1704: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1705: $envhash{'course.'.$normalid.'.num'}=$cnum;
1706: }
1707: }
1708: &appenv(%envhash);
1709: return %returnhash;
1710: }
1711:
1712: # -------------------------------------------------------- Get user privileges
1713:
1714: sub rolesinit {
1715: my ($domain,$username,$authhost)=@_;
1716: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1717: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1718: my %allroles=();
1719: my %thesepriv=();
1720: my $now=time;
1721: my $userroles="user.login.time=$now\n";
1722: my $thesestr;
1723:
1724: if ($rolesdump ne '') {
1725: foreach (split(/&/,$rolesdump)) {
1726: if ($_!~/^rolesdef\&/) {
1727: my ($area,$role)=split(/=/,$_);
1728: $area=~s/\_\w\w$//;
1729: my ($trole,$tend,$tstart)=split(/_/,$role);
1730: $userroles.='user.role.'.$trole.'.'.$area.'='.
1731: $tstart.'.'.$tend."\n";
1732: # log the associated role with the area
1733: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
1734: if ($tend!=0) {
1735: if ($tend<$now) {
1736: $trole='';
1737: }
1738: }
1739: if ($tstart!=0) {
1740: if ($tstart>$now) {
1741: $trole='';
1742: }
1743: }
1744: if (($area ne '') && ($trole ne '')) {
1745: my $spec=$trole.'.'.$area;
1746: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1747: if ($trole =~ /^cr\//) {
1748: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1749: my $homsvr=homeserver($rauthor,$rdomain);
1750: if ($hostname{$homsvr} ne '') {
1751: my $roledef=
1752: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1753: $homsvr);
1754: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1755: my ($syspriv,$dompriv,$coursepriv)=
1756: split(/\_/,unescape($roledef));
1757: if (defined($syspriv)) {
1758: $allroles{'cm./'}.=':'.$syspriv;
1759: $allroles{$spec.'./'}.=':'.$syspriv;
1760: }
1761: if ($tdomain ne '') {
1762: if (defined($dompriv)) {
1763: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1764: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1765: }
1766: if ($trest ne '') {
1767: if (defined($coursepriv)) {
1768: $allroles{'cm.'.$area}.=':'.$coursepriv;
1769: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1770: }
1771: }
1772: }
1773: }
1774: }
1775: } else {
1776: if (defined($pr{$trole.':s'})) {
1777: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1778: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1779: }
1780: if ($tdomain ne '') {
1781: if (defined($pr{$trole.':d'})) {
1782: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1783: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1784: }
1785: if ($trest ne '') {
1786: if (defined($pr{$trole.':c'})) {
1787: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1788: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1789: }
1790: }
1791: }
1792: }
1793: }
1794: }
1795: }
1796: my $adv=0;
1797: my $author=0;
1798: foreach (keys %allroles) {
1799: %thesepriv=();
1800: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1801: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1802: foreach (split(/:/,$allroles{$_})) {
1803: if ($_ ne '') {
1804: my ($privilege,$restrictions)=split(/&/,$_);
1805: if ($restrictions eq '') {
1806: $thesepriv{$privilege}='F';
1807: } else {
1808: if ($thesepriv{$privilege} ne 'F') {
1809: $thesepriv{$privilege}.=$restrictions;
1810: }
1811: }
1812: }
1813: }
1814: $thesestr='';
1815: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1816: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1817: }
1818: $userroles.='user.adv='.$adv."\n".
1819: 'user.author='.$author."\n";
1820: $ENV{'user.adv'}=$adv;
1821: }
1822: return $userroles;
1823: }
1824:
1825: # --------------------------------------------------------------- get interface
1826:
1827: sub get {
1828: my ($namespace,$storearr,$udomain,$uname)=@_;
1829: my $items='';
1830: foreach (@$storearr) {
1831: $items.=escape($_).'&';
1832: }
1833: $items=~s/\&$//;
1834: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1835: if (!$uname) { $uname=$ENV{'user.name'}; }
1836: my $uhome=&homeserver($uname,$udomain);
1837:
1838: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1839: my @pairs=split(/\&/,$rep);
1840: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1841: return @pairs;
1842: }
1843: my %returnhash=();
1844: my $i=0;
1845: foreach (@$storearr) {
1846: $returnhash{$_}=unescape($pairs[$i]);
1847: $i++;
1848: }
1849: return %returnhash;
1850: }
1851:
1852: # --------------------------------------------------------------- del interface
1853:
1854: sub del {
1855: my ($namespace,$storearr,$udomain,$uname)=@_;
1856: my $items='';
1857: foreach (@$storearr) {
1858: $items.=escape($_).'&';
1859: }
1860: $items=~s/\&$//;
1861: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1862: if (!$uname) { $uname=$ENV{'user.name'}; }
1863: my $uhome=&homeserver($uname,$udomain);
1864:
1865: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1866: }
1867:
1868: # -------------------------------------------------------------- dump interface
1869:
1870: sub dump {
1871: my ($namespace,$udomain,$uname,$regexp)=@_;
1872: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1873: if (!$uname) { $uname=$ENV{'user.name'}; }
1874: my $uhome=&homeserver($uname,$udomain);
1875: if ($regexp) {
1876: $regexp=&escape($regexp);
1877: } else {
1878: $regexp='.';
1879: }
1880: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1881: my @pairs=split(/\&/,$rep);
1882: my %returnhash=();
1883: foreach (@pairs) {
1884: my ($key,$value)=split(/=/,$_);
1885: $returnhash{unescape($key)}=unescape($value);
1886: }
1887: return %returnhash;
1888: }
1889:
1890: # --------------------------------------------------------------- currentdump
1891: sub currentdump {
1892: my ($courseid,$sdom,$sname)=@_;
1893: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1894: $sdom = $ENV{'user.domain'} if (! defined($sdom));
1895: $sname = $ENV{'user.name'} if (! defined($sname));
1896: my $uhome = &homeserver($sname,$sdom);
1897: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
1898: return if ($rep =~ /^(error:|no_such_host)/);
1899: #
1900: my %returnhash=();
1901: #
1902: if ($rep eq "unknown_cmd") {
1903: # an old lond will not know currentdump
1904: # Do a dump and make it look like a currentdump
1905: my @tmp = &dump($courseid,$sdom,$sname,'.');
1906: return if ($tmp[0] =~ /^(error:|no_such_host)/);
1907: my %hash = @tmp;
1908: @tmp=();
1909: # Code ripped from lond, essentially. The only difference
1910: # here is the unescaping done by lonnet::dump(). Conceivably
1911: # we might run in to problems with parameter names =~ /^v\./
1912: while (my ($key,$value) = each(%hash)) {
1913: my ($v,$symb,$param) = split(/:/,$key);
1914: next if ($v eq 'version' || $symb eq 'keys');
1915: next if (exists($returnhash{$symb}) &&
1916: exists($returnhash{$symb}->{$param}) &&
1917: $returnhash{$symb}->{'v.'.$param} > $v);
1918: $returnhash{$symb}->{$param}=$value;
1919: $returnhash{$symb}->{'v.'.$param}=$v;
1920: }
1921: #
1922: # Remove all of the keys in the hashes which keep track of
1923: # the version of the parameter.
1924: while (my ($symb,$param_hash) = each(%returnhash)) {
1925: # use a foreach because we are going to delete from the hash.
1926: foreach my $key (keys(%$param_hash)) {
1927: delete($param_hash->{$key}) if ($key =~ /^v\./);
1928: }
1929: }
1930: } else {
1931: my @pairs=split(/\&/,$rep);
1932: foreach (@pairs) {
1933: my ($key,$value)=split(/=/,$_);
1934: my ($symb,$param) = split(/:/,$key);
1935: $returnhash{&unescape($symb)}->{&unescape($param)} =
1936: &unescape($value);
1937: }
1938: }
1939: return %returnhash;
1940: }
1941:
1942: # --------------------------------------------------------------- put interface
1943:
1944: sub put {
1945: my ($namespace,$storehash,$udomain,$uname)=@_;
1946: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1947: if (!$uname) { $uname=$ENV{'user.name'}; }
1948: my $uhome=&homeserver($uname,$udomain);
1949: my $items='';
1950: foreach (keys %$storehash) {
1951: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1952: }
1953: $items=~s/\&$//;
1954: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1955: }
1956:
1957: # ------------------------------------------------------ critical put interface
1958:
1959: sub cput {
1960: my ($namespace,$storehash,$udomain,$uname)=@_;
1961: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1962: if (!$uname) { $uname=$ENV{'user.name'}; }
1963: my $uhome=&homeserver($uname,$udomain);
1964: my $items='';
1965: foreach (keys %$storehash) {
1966: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1967: }
1968: $items=~s/\&$//;
1969: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1970: }
1971:
1972: # -------------------------------------------------------------- eget interface
1973:
1974: sub eget {
1975: my ($namespace,$storearr,$udomain,$uname)=@_;
1976: my $items='';
1977: foreach (@$storearr) {
1978: $items.=escape($_).'&';
1979: }
1980: $items=~s/\&$//;
1981: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1982: if (!$uname) { $uname=$ENV{'user.name'}; }
1983: my $uhome=&homeserver($uname,$udomain);
1984: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1985: my @pairs=split(/\&/,$rep);
1986: my %returnhash=();
1987: my $i=0;
1988: foreach (@$storearr) {
1989: $returnhash{$_}=unescape($pairs[$i]);
1990: $i++;
1991: }
1992: return %returnhash;
1993: }
1994:
1995: # ---------------------------------------------- Custom access rule evaluation
1996:
1997: sub customaccess {
1998: my ($priv,$uri)=@_;
1999: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2000: $urealm=~s/^\W//;
2001: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2002: my $access=0;
2003: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2004: my ($effect,$realm,$role)=split(/\:/,$_);
2005: if ($role) {
2006: if ($role ne $urole) { next; }
2007: }
2008: foreach (split(/\s*\,\s*/,$realm)) {
2009: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2010: if ($tdom) {
2011: if ($tdom ne $udom) { next; }
2012: }
2013: if ($tcrs) {
2014: if ($tcrs ne $ucrs) { next; }
2015: }
2016: if ($tsec) {
2017: if ($tsec ne $usec) { next; }
2018: }
2019: $access=($effect eq 'allow');
2020: last;
2021: }
2022: }
2023: return $access;
2024: }
2025:
2026: # ------------------------------------------------- Check for a user privilege
2027:
2028: sub allowed {
2029: my ($priv,$uri)=@_;
2030:
2031: my $orguri=$uri;
2032: $uri=&declutter($uri);
2033:
2034: # Free bre access to adm and meta resources
2035:
2036: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2037: return 'F';
2038: }
2039:
2040: # Free bre to public access
2041:
2042: if ($priv eq 'bre') {
2043: my $copyright=&metadata($uri,'copyright');
2044: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2045: return 'F';
2046: }
2047: if ($copyright eq 'priv') {
2048: $uri=~/([^\/]+)\/([^\/]+)\//;
2049: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2050: return '';
2051: }
2052: }
2053: if ($copyright eq 'domain') {
2054: $uri=~/([^\/]+)\/([^\/]+)\//;
2055: unless (($ENV{'user.domain'} eq $1) ||
2056: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2057: return '';
2058: }
2059: }
2060: if ($ENV{'request.role'}=~ /li\.\//) {
2061: # Library role, so allow browsing of resources in this domain.
2062: return 'F';
2063: }
2064: if ($copyright eq 'custom') {
2065: unless (&customaccess($priv,$uri)) { return ''; }
2066: }
2067: }
2068: # Domain coordinator is trying to create a course
2069: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2070: # uri is the requested domain in this case.
2071: # comparison to 'request.role.domain' shows if the user has selected
2072: # a role of dc for the domain in question.
2073: return 'F' if ($uri eq $ENV{'request.role.domain'});
2074: }
2075:
2076: my $thisallowed='';
2077: my $statecond=0;
2078: my $courseprivid='';
2079:
2080: # Course
2081:
2082: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2083: $thisallowed.=$1;
2084: }
2085:
2086: # Domain
2087:
2088: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2089: =~/$priv\&([^\:]*)/) {
2090: $thisallowed.=$1;
2091: }
2092:
2093: # Course: uri itself is a course
2094: my $courseuri=$uri;
2095: $courseuri=~s/\_(\d)/\/$1/;
2096: $courseuri=~s/^([^\/])/\/$1/;
2097:
2098: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2099: =~/$priv\&([^\:]*)/) {
2100: $thisallowed.=$1;
2101: }
2102:
2103: # URI is an uploaded document for this course
2104:
2105: if (($priv eq 'bre') &&
2106: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2107: return 'F';
2108: }
2109: # Full access at system, domain or course-wide level? Exit.
2110:
2111: if ($thisallowed=~/F/) {
2112: return 'F';
2113: }
2114:
2115: # If this is generating or modifying users, exit with special codes
2116:
2117: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
2118: return $thisallowed;
2119: }
2120: #
2121: # Gathered so far: system, domain and course wide privileges
2122: #
2123: # Course: See if uri or referer is an individual resource that is part of
2124: # the course
2125:
2126: if ($ENV{'request.course.id'}) {
2127:
2128: $courseprivid=$ENV{'request.course.id'};
2129: if ($ENV{'request.course.sec'}) {
2130: $courseprivid.='/'.$ENV{'request.course.sec'};
2131: }
2132: $courseprivid=~s/\_/\//;
2133: my $checkreferer=1;
2134: my ($match,$cond)=&is_on_map($uri);
2135: if ($match) {
2136: $statecond=$cond;
2137: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2138: =~/$priv\&([^\:]*)/) {
2139: $thisallowed.=$1;
2140: $checkreferer=0;
2141: }
2142: }
2143:
2144: if ($checkreferer) {
2145: my $refuri=$ENV{'httpref.'.$orguri};
2146: unless ($refuri) {
2147: foreach (keys %ENV) {
2148: if ($_=~/^httpref\..*\*/) {
2149: my $pattern=$_;
2150: $pattern=~s/^httpref\.\/res\///;
2151: $pattern=~s/\*/\[\^\/\]\+/g;
2152: $pattern=~s/\//\\\//g;
2153: if ($orguri=~/$pattern/) {
2154: $refuri=$ENV{$_};
2155: }
2156: }
2157: }
2158: }
2159:
2160: if ($refuri) {
2161: $refuri=&declutter($refuri);
2162: my ($match,$cond)=&is_on_map($refuri);
2163: if ($match) {
2164: my $refstatecond=$cond;
2165: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2166: =~/$priv\&([^\:]*)/) {
2167: $thisallowed.=$1;
2168: $uri=$refuri;
2169: $statecond=$refstatecond;
2170: }
2171: }
2172: }
2173: }
2174: }
2175:
2176: #
2177: # Gathered now: all privileges that could apply, and condition number
2178: #
2179: #
2180: # Full or no access?
2181: #
2182:
2183: if ($thisallowed=~/F/) {
2184: return 'F';
2185: }
2186:
2187: unless ($thisallowed) {
2188: return '';
2189: }
2190:
2191: # Restrictions exist, deal with them
2192: #
2193: # C:according to course preferences
2194: # R:according to resource settings
2195: # L:unless locked
2196: # X:according to user session state
2197: #
2198:
2199: # Possibly locked functionality, check all courses
2200: # Locks might take effect only after 10 minutes cache expiration for other
2201: # courses, and 2 minutes for current course
2202:
2203: my $envkey;
2204: if ($thisallowed=~/L/) {
2205: foreach $envkey (keys %ENV) {
2206: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2207: my $courseid=$2;
2208: my $roleid=$1.'.'.$2;
2209: $courseid=~s/^\///;
2210: my $expiretime=600;
2211: if ($ENV{'request.role'} eq $roleid) {
2212: $expiretime=120;
2213: }
2214: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2215: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2216: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2217: &coursedescription($courseid);
2218: }
2219: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2220: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2221: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2222: &log($ENV{'user.domain'},$ENV{'user.name'},
2223: $ENV{'user.home'},
2224: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2225: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2226: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2227: return '';
2228: }
2229: }
2230: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2231: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2232: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2233: &log($ENV{'user.domain'},$ENV{'user.name'},
2234: $ENV{'user.home'},
2235: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2236: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2237: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2238: return '';
2239: }
2240: }
2241: }
2242: }
2243: }
2244:
2245: #
2246: # Rest of the restrictions depend on selected course
2247: #
2248:
2249: unless ($ENV{'request.course.id'}) {
2250: return '1';
2251: }
2252:
2253: #
2254: # Now user is definitely in a course
2255: #
2256:
2257:
2258: # Course preferences
2259:
2260: if ($thisallowed=~/C/) {
2261: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2262: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2263: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2264: =~/$rolecode/) {
2265: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2266: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2267: $ENV{'request.course.id'});
2268: return '';
2269: }
2270:
2271: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2272: =~/$unamedom/) {
2273: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2274: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2275: $ENV{'request.course.id'});
2276: return '';
2277: }
2278: }
2279:
2280: # Resource preferences
2281:
2282: if ($thisallowed=~/R/) {
2283: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2284: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2285: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2286: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2287: return '';
2288: }
2289: }
2290:
2291: # Restricted by state or randomout?
2292:
2293: if ($thisallowed=~/X/) {
2294: if ($ENV{'acc.randomout'}) {
2295: my $symb=&symbread($uri,1);
2296: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2297: return '';
2298: }
2299: }
2300: if (&condval($statecond)) {
2301: return '2';
2302: } else {
2303: return '';
2304: }
2305: }
2306:
2307: return 'F';
2308: }
2309:
2310: # --------------------------------------------------- Is a resource on the map?
2311:
2312: sub is_on_map {
2313: my $uri=&declutter(shift);
2314: my @uriparts=split(/\//,$uri);
2315: my $filename=$uriparts[$#uriparts];
2316: my $pathname=$uri;
2317: $pathname=~s|/\Q$filename\E$||;
2318: $pathname=~s/^adm\/wrapper\///;
2319: #Trying to find the conditional for the file
2320: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2321: /\&\Q$filename\E\:([\d\|]+)\&/);
2322: if ($match) {
2323: return (1,$1);
2324: } else {
2325: return (0,0);
2326: }
2327: }
2328:
2329: # ----------------------------------------------------------------- Define Role
2330:
2331: sub definerole {
2332: if (allowed('mcr','/')) {
2333: my ($rolename,$sysrole,$domrole,$courole)=@_;
2334: foreach (split('/',$sysrole)) {
2335: my ($crole,$cqual)=split(/\&/,$_);
2336: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2337: if ($pr{'cr:s'}=~/$crole\&/) {
2338: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2339: return "refused:s:$crole&$cqual";
2340: }
2341: }
2342: }
2343: foreach (split('/',$domrole)) {
2344: my ($crole,$cqual)=split(/\&/,$_);
2345: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2346: if ($pr{'cr:d'}=~/$crole\&/) {
2347: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2348: return "refused:d:$crole&$cqual";
2349: }
2350: }
2351: }
2352: foreach (split('/',$courole)) {
2353: my ($crole,$cqual)=split(/\&/,$_);
2354: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2355: if ($pr{'cr:c'}=~/$crole\&/) {
2356: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2357: return "refused:c:$crole&$cqual";
2358: }
2359: }
2360: }
2361: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2362: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2363: "rolesdef_$rolename=".
2364: escape($sysrole.'_'.$domrole.'_'.$courole);
2365: return reply($command,$ENV{'user.home'});
2366: } else {
2367: return 'refused';
2368: }
2369: }
2370:
2371: # ---------------- Make a metadata query against the network of library servers
2372:
2373: sub metadata_query {
2374: my ($query,$custom,$customshow,$server_array)=@_;
2375: my %rhash;
2376: my @server_list = (defined($server_array) ? @$server_array
2377: : keys(%libserv) );
2378: for my $server (@server_list) {
2379: unless ($custom or $customshow) {
2380: my $reply=&reply("querysend:".&escape($query),$server);
2381: $rhash{$server}=$reply;
2382: }
2383: else {
2384: my $reply=&reply("querysend:".&escape($query).':'.
2385: &escape($custom).':'.&escape($customshow),
2386: $server);
2387: $rhash{$server}=$reply;
2388: }
2389: }
2390: return \%rhash;
2391: }
2392:
2393: # ----------------------------------------- Send log queries and wait for reply
2394:
2395: sub log_query {
2396: my ($uname,$udom,$query,%filters)=@_;
2397: my $uhome=&homeserver($uname,$udom);
2398: if ($uhome eq 'no_host') { return 'error: no_host'; }
2399: my $uhost=$hostname{$uhome};
2400: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2401: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2402: $uhome);
2403: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2404: return get_query_reply($queryid);
2405: }
2406:
2407: sub get_query_reply {
2408: my $queryid=shift;
2409: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2410: my $reply='';
2411: for (1..100) {
2412: sleep 2;
2413: if (-e $replyfile.'.end') {
2414: if (my $fh=Apache::File->new($replyfile)) {
2415: $reply.=<$fh>;
2416: $fh->close;
2417: } else { return 'error: reply_file_error'; }
2418: return &unescape($reply);
2419: }
2420: }
2421: return 'timeout:'.$queryid;
2422: }
2423:
2424: sub courselog_query {
2425: #
2426: # possible filters:
2427: # url: url or symb
2428: # username
2429: # domain
2430: # action: view, submit, grade
2431: # start: timestamp
2432: # end: timestamp
2433: #
2434: my (%filters)=@_;
2435: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2436: if ($filters{'url'}) {
2437: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2438: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2439: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2440: }
2441: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2442: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2443: return &log_query($cname,$cdom,'courselog',%filters);
2444: }
2445:
2446: sub userlog_query {
2447: my ($uname,$udom,%filters)=@_;
2448: return &log_query($uname,$udom,'userlog',%filters);
2449: }
2450:
2451: # ------------------------------------------------------------------ Plain Text
2452:
2453: sub plaintext {
2454: my $short=shift;
2455: return $prp{$short};
2456: }
2457:
2458: # ----------------------------------------------------------------- Assign Role
2459:
2460: sub assignrole {
2461: my ($udom,$uname,$url,$role,$end,$start)=@_;
2462: my $mrole;
2463: if ($role =~ /^cr\//) {
2464: unless (&allowed('ccr',$url)) {
2465: &logthis('Refused custom assignrole: '.
2466: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2467: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2468: return 'refused';
2469: }
2470: $mrole='cr';
2471: } else {
2472: my $cwosec=$url;
2473: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2474: unless (&allowed('c'.$role,$cwosec)) {
2475: &logthis('Refused assignrole: '.
2476: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2477: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2478: return 'refused';
2479: }
2480: $mrole=$role;
2481: }
2482: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2483: "$udom:$uname:$url".'_'."$mrole=$role";
2484: if ($end) { $command.='_'.$end; }
2485: if ($start) {
2486: if ($end) {
2487: $command.='_'.$start;
2488: } else {
2489: $command.='_0_'.$start;
2490: }
2491: }
2492: my $answer=&reply($command,&homeserver($uname,$udom));
2493: if ($answer eq 'ok') {
2494: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
2495: }
2496: return $answer;
2497: }
2498:
2499: # -------------------------------------------------- Modify user authentication
2500: # Overrides without validation
2501:
2502: sub modifyuserauth {
2503: my ($udom,$uname,$umode,$upass)=@_;
2504: my $uhome=&homeserver($uname,$udom);
2505: unless (&allowed('mau',$udom)) { return 'refused'; }
2506: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2507: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2508: ' in domain '.$ENV{'request.role.domain'});
2509: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2510: &escape($upass),$uhome);
2511: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2512: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2513: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2514: &log($udom,,$uname,$uhome,
2515: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2516: $ENV{'user.name'}.', '.$umode.
2517: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2518: unless ($reply eq 'ok') {
2519: &logthis('Authentication mode error: '.$reply);
2520: return 'error: '.$reply;
2521: }
2522: return 'ok';
2523: }
2524:
2525: # --------------------------------------------------------------- Modify a user
2526:
2527: sub modifyuser {
2528: my ($udom, $uname, $uid,
2529: $umode, $upass, $first,
2530: $middle, $last, $gene,
2531: $forceid, $desiredhome)=@_;
2532: $udom=~s/\W//g;
2533: $uname=~s/\W//g;
2534: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2535: $umode.', '.$first.', '.$middle.', '.
2536: $last.', '.$gene.'(forceid: '.$forceid.')'.
2537: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2538: ' desiredhome not specified').
2539: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2540: ' in domain '.$ENV{'request.role.domain'});
2541: my $uhome=&homeserver($uname,$udom,'true');
2542: # ----------------------------------------------------------------- Create User
2543: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2544: my $unhome='';
2545: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2546: $unhome = $desiredhome;
2547: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2548: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2549: } else { # load balancing routine for determining $unhome
2550: my $tryserver;
2551: my $loadm=10000000;
2552: foreach $tryserver (keys %libserv) {
2553: if ($hostdom{$tryserver} eq $udom) {
2554: my $answer=reply('load',$tryserver);
2555: if (($answer=~/\d+/) && ($answer<$loadm)) {
2556: $loadm=$answer;
2557: $unhome=$tryserver;
2558: }
2559: }
2560: }
2561: }
2562: if (($unhome eq '') || ($unhome eq 'no_host')) {
2563: return 'error: unable to find a home server for '.$uname.
2564: ' in domain '.$udom;
2565: }
2566: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2567: &escape($upass),$unhome);
2568: unless ($reply eq 'ok') {
2569: return 'error: '.$reply;
2570: }
2571: $uhome=&homeserver($uname,$udom,'true');
2572: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2573: return 'error: verify home';
2574: }
2575: } # End of creation of new user
2576: # ---------------------------------------------------------------------- Add ID
2577: if ($uid) {
2578: $uid=~tr/A-Z/a-z/;
2579: my %uidhash=&idrget($udom,$uname);
2580: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2581: && (!$forceid)) {
2582: unless ($uid eq $uidhash{$uname}) {
2583: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2584: }
2585: } else {
2586: &idput($udom,($uname => $uid));
2587: }
2588: }
2589: # -------------------------------------------------------------- Add names, etc
2590: my @tmp=&get('environment',
2591: ['firstname','middlename','lastname','generation'],
2592: $udom,$uname);
2593: my %names;
2594: if ($tmp[0] =~ m/^error:.*/) {
2595: %names=();
2596: } else {
2597: %names = @tmp;
2598: }
2599: if ($first) { $names{'firstname'} = $first; }
2600: if ($middle) { $names{'middlename'} = $middle; }
2601: if ($last) { $names{'lastname'} = $last; }
2602: if ($gene) { $names{'generation'} = $gene; }
2603: my $reply = &put('environment', \%names, $udom,$uname);
2604: if ($reply ne 'ok') { return 'error: '.$reply; }
2605: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2606: $umode.', '.$first.', '.$middle.', '.
2607: $last.', '.$gene.' by '.
2608: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2609: return 'ok';
2610: }
2611:
2612: # -------------------------------------------------------------- Modify student
2613:
2614: sub modifystudent {
2615: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2616: $end,$start,$forceid,$desiredhome)=@_;
2617: my $cid='';
2618: unless ($cid=$ENV{'request.course.id'}) {
2619: return 'not_in_class';
2620: }
2621: # --------------------------------------------------------------- Make the user
2622: my $reply=&modifyuser
2623: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2624: $desiredhome);
2625: unless ($reply eq 'ok') { return $reply; }
2626: # This will cause &modify_student_enrollment to get the uid from the
2627: # students environment
2628: $uid = undef if (!$forceid);
2629: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2630: $last,$gene,$usec,$end,$start);
2631: return $reply;
2632: }
2633:
2634: sub modify_student_enrollment {
2635: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2636: # Get the course id from the environment
2637: my $cid='';
2638: unless ($cid=$ENV{'request.course.id'}) {
2639: return 'not_in_class';
2640: }
2641: # Make sure the user exists
2642: my $uhome=&homeserver($uname,$udom);
2643: if (($uhome eq '') || ($uhome eq 'no_host')) {
2644: return 'error: no such user';
2645: }
2646: #
2647: # Get student data if we were not given enough information
2648: if (!defined($first) || $first eq '' ||
2649: !defined($last) || $last eq '' ||
2650: !defined($uid) || $uid eq '' ||
2651: !defined($middle) || $middle eq '' ||
2652: !defined($gene) || $gene eq '') {
2653: # They did not supply us with enough data to enroll the student, so
2654: # we need to pick up more information.
2655: my %tmp = &get('environment',
2656: ['firstname','middlename','lastname', 'generation','id']
2657: ,$udom,$uname);
2658:
2659: foreach (keys(%tmp)) {
2660: &logthis("key $_ = ".$tmp{$_});
2661: }
2662: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2663: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2664: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
2665: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
2666: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2667: }
2668: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2669: $first,$middle);
2670: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2671: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2672: &escape($uname.':'.$udom).'='.
2673: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
2674: $ENV{'course.'.$cid.'.home'});
2675: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2676: return 'error: '.$reply;
2677: }
2678: # Add student role to user
2679: my $uurl='/'.$cid;
2680: $uurl=~s/\_/\//g;
2681: if ($usec) {
2682: $uurl.='/'.$usec;
2683: }
2684: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2685: }
2686:
2687: # ------------------------------------------------- Write to course preferences
2688:
2689: sub writecoursepref {
2690: my ($courseid,%prefs)=@_;
2691: $courseid=~s/^\///;
2692: $courseid=~s/\_/\//g;
2693: my ($cdomain,$cnum)=split(/\//,$courseid);
2694: my $chome=homeserver($cnum,$cdomain);
2695: if (($chome eq '') || ($chome eq 'no_host')) {
2696: return 'error: no such course';
2697: }
2698: my $cstring='';
2699: foreach (keys %prefs) {
2700: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2701: }
2702: $cstring=~s/\&$//;
2703: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2704: }
2705:
2706: # ---------------------------------------------------------- Make/modify course
2707:
2708: sub createcourse {
2709: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2710: $url=&declutter($url);
2711: my $cid='';
2712: unless (&allowed('ccc',$udom)) {
2713: return 'refused';
2714: }
2715: # ------------------------------------------------------------------- Create ID
2716: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2717: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2718: # ----------------------------------------------- Make sure that does not exist
2719: my $uhome=&homeserver($uname,$udom,'true');
2720: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2721: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2722: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2723: $uhome=&homeserver($uname,$udom,'true');
2724: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2725: return 'error: unable to generate unique course-ID';
2726: }
2727: }
2728: # ------------------------------------------------ Check supplied server name
2729: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2730: if (! exists($libserv{$course_server})) {
2731: return 'error:bad server name '.$course_server;
2732: }
2733: # ------------------------------------------------------------- Make the course
2734: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2735: $course_server);
2736: unless ($reply eq 'ok') { return 'error: '.$reply; }
2737: $uhome=&homeserver($uname,$udom,'true');
2738: if (($uhome eq '') || ($uhome eq 'no_host')) {
2739: return 'error: no such course';
2740: }
2741: # ----------------------------------------------------------------- Course made
2742: my $topurl=$url;
2743: unless ($nonstandard) {
2744: # ------------------------------------------ For standard courses, make top url
2745: my $mapurl=&clutter($url);
2746: if ($mapurl eq '/res/') { $mapurl=''; }
2747: $ENV{'form.initmap'}=(<<ENDINITMAP);
2748: <map>
2749: <resource id="1" type="start"></resource>
2750: <resource id="2" src="$mapurl"></resource>
2751: <resource id="3" type="finish"></resource>
2752: <link index="1" from="1" to="2"></link>
2753: <link index="2" from="2" to="3"></link>
2754: </map>
2755: ENDINITMAP
2756: $topurl=&declutter(
2757: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2758: );
2759: }
2760: # ----------------------------------------------------------- Write preferences
2761: &writecoursepref($udom.'_'.$uname,
2762: ('description' => $description,
2763: 'url' => $topurl));
2764: return '/'.$udom.'/'.$uname;
2765: }
2766:
2767: # ---------------------------------------------------------- Assign Custom Role
2768:
2769: sub assigncustomrole {
2770: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2771: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2772: $end,$start);
2773: }
2774:
2775: # ----------------------------------------------------------------- Revoke Role
2776:
2777: sub revokerole {
2778: my ($udom,$uname,$url,$role)=@_;
2779: my $now=time;
2780: return &assignrole($udom,$uname,$url,$role,$now);
2781: }
2782:
2783: # ---------------------------------------------------------- Revoke Custom Role
2784:
2785: sub revokecustomrole {
2786: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2787: my $now=time;
2788: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2789: }
2790:
2791: # ------------------------------------------------------------ Directory lister
2792:
2793: sub dirlist {
2794: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2795:
2796: $uri=~s/^\///;
2797: $uri=~s/\/$//;
2798: my ($udom, $uname);
2799: (undef,$udom,$uname)=split(/\//,$uri);
2800: if(defined($userdomain)) {
2801: $udom = $userdomain;
2802: }
2803: if(defined($username)) {
2804: $uname = $username;
2805: }
2806:
2807: my $dirRoot = $perlvar{'lonDocRoot'};
2808: if(defined($alternateDirectoryRoot)) {
2809: $dirRoot = $alternateDirectoryRoot;
2810: $dirRoot =~ s/\/$//;
2811: }
2812:
2813: if($udom) {
2814: if($uname) {
2815: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2816: homeserver($uname,$udom));
2817: return split(/:/,$listing);
2818: } elsif(!defined($alternateDirectoryRoot)) {
2819: my $tryserver;
2820: my %allusers=();
2821: foreach $tryserver (keys %libserv) {
2822: if($hostdom{$tryserver} eq $udom) {
2823: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2824: $udom, $tryserver);
2825: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2826: && ($listing ne 'con_lost')) {
2827: foreach (split(/:/,$listing)) {
2828: my ($entry,@stat)=split(/&/,$_);
2829: $allusers{$entry}=1;
2830: }
2831: }
2832: }
2833: }
2834: my $alluserstr='';
2835: foreach (sort keys %allusers) {
2836: $alluserstr.=$_.'&user:';
2837: }
2838: $alluserstr=~s/:$//;
2839: return split(/:/,$alluserstr);
2840: } else {
2841: my @emptyResults = ();
2842: push(@emptyResults, 'missing user name');
2843: return split(':',@emptyResults);
2844: }
2845: } elsif(!defined($alternateDirectoryRoot)) {
2846: my $tryserver;
2847: my %alldom=();
2848: foreach $tryserver (keys %libserv) {
2849: $alldom{$hostdom{$tryserver}}=1;
2850: }
2851: my $alldomstr='';
2852: foreach (sort keys %alldom) {
2853: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2854: }
2855: $alldomstr=~s/:$//;
2856: return split(/:/,$alldomstr);
2857: } else {
2858: my @emptyResults = ();
2859: push(@emptyResults, 'missing domain');
2860: return split(':',@emptyResults);
2861: }
2862: }
2863:
2864: # --------------------------------------------- GetFileTimestamp
2865: # This function utilizes dirlist and returns the date stamp for
2866: # when it was last modified. It will also return an error of -1
2867: # if an error occurs
2868:
2869: sub GetFileTimestamp {
2870: my ($studentDomain,$studentName,$filename,$root)=@_;
2871: $studentDomain=~s/\W//g;
2872: $studentName=~s/\W//g;
2873: my $subdir=$studentName.'__';
2874: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
2875: my $proname="$studentDomain/$subdir/$studentName";
2876: $proname .= '/'.$filename;
2877: my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
2878: $root);
2879: my $fileStat = $dir[0];
2880: my @stats = split('&', $fileStat);
2881: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
2882: return $stats[9];
2883: } else {
2884: return -1;
2885: }
2886: }
2887:
2888: # -------------------------------------------------------- Value of a Condition
2889:
2890: sub directcondval {
2891: my $number=shift;
2892: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2893: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2894: } else {
2895: return 2;
2896: }
2897: }
2898:
2899: sub condval {
2900: my $condidx=shift;
2901: my $result=0;
2902: my $allpathcond='';
2903: foreach (split(/\|/,$condidx)) {
2904: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2905: $allpathcond.=
2906: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2907: }
2908: }
2909: $allpathcond=~s/\|$//;
2910: if ($ENV{'request.course.id'}) {
2911: if ($allpathcond) {
2912: my $operand='|';
2913: my @stack;
2914: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
2915: if ($_ eq '(') {
2916: push @stack,($operand,$result)
2917: } elsif ($_ eq ')') {
2918: my $before=pop @stack;
2919: if (pop @stack eq '&') {
2920: $result=$result>$before?$before:$result;
2921: } else {
2922: $result=$result>$before?$result:$before;
2923: }
2924: } elsif (($_ eq '&') || ($_ eq '|')) {
2925: $operand=$_;
2926: } else {
2927: my $new=directcondval($_);
2928: if ($operand eq '&') {
2929: $result=$result>$new?$new:$result;
2930: } else {
2931: $result=$result>$new?$result:$new;
2932: }
2933: }
2934: }
2935: }
2936: }
2937: return $result;
2938: }
2939:
2940: # ---------------------------------------------------- Devalidate courseresdata
2941:
2942: sub devalidatecourseresdata {
2943: my ($coursenum,$coursedomain)=@_;
2944: my $hashid=$coursenum.':'.$coursedomain;
2945: delete $courseresdatacache{$hashid.'.time'};
2946: }
2947:
2948: # --------------------------------------------------- Course Resourcedata Query
2949:
2950: sub courseresdata {
2951: my ($coursenum,$coursedomain,@which)=@_;
2952: my $coursehom=&homeserver($coursenum,$coursedomain);
2953: my $hashid=$coursenum.':'.$coursedomain;
2954: my $dodump=0;
2955: if (!defined($courseresdatacache{$hashid.'.time'})) {
2956: $dodump=1;
2957: } else {
2958: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
2959: }
2960: if ($dodump) {
2961: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
2962: my ($tmp) = keys(%dumpreply);
2963: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
2964: $courseresdatacache{$hashid.'.time'}=time;
2965: $courseresdatacache{$hashid}=\%dumpreply;
2966: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
2967: return $tmp;
2968: }
2969: }
2970: foreach my $item (@which) {
2971: if (defined($courseresdatacache{$hashid}->{$item})) {
2972: return $courseresdatacache{$hashid}->{$item};
2973: }
2974: }
2975: return undef;
2976: }
2977:
2978: # --------------------------------------------------------- Value of a Variable
2979:
2980: sub EXT {
2981: my ($varname,$symbparm,$udom,$uname,)=@_;
2982:
2983: unless ($varname) { return ''; }
2984: #get real user name/domain, courseid and symb
2985: my $courseid;
2986: if (!($uname && $udom)) {
2987: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2988: if (!$symbparm) { $symbparm=$cursymb; }
2989: } else {
2990: $courseid=$ENV{'request.course.id'};
2991: }
2992: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2993: my $rest;
2994: if (defined($therest[0])) {
2995: $rest=join('.',@therest);
2996: } else {
2997: $rest='';
2998: }
2999:
3000: my $qualifierrest=$qualifier;
3001: if ($rest) { $qualifierrest.='.'.$rest; }
3002: my $spacequalifierrest=$space;
3003: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
3004: if ($realm eq 'user') {
3005: # --------------------------------------------------------------- user.resource
3006: if ($space eq 'resource') {
3007: if (defined($Apache::lonhomework::parsing_a_problem)) {
3008: return $Apache::lonhomework::history{$qualifierrest};
3009: } else {
3010: my %restored=&restore($symbparm,$courseid,$udom,$uname);
3011: return $restored{$qualifierrest};
3012: }
3013: # ----------------------------------------------------------------- user.access
3014: } elsif ($space eq 'access') {
3015: # FIXME - not supporting calls for a specific user
3016: return &allowed($qualifier,$rest);
3017: # ------------------------------------------ user.preferences, user.environment
3018: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
3019: if (($uname eq $ENV{'user.name'}) &&
3020: ($udom eq $ENV{'user.domain'})) {
3021: return $ENV{join('.',('environment',$qualifierrest))};
3022: } else {
3023: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
3024: return $returnhash{$qualifierrest};
3025: }
3026: # ----------------------------------------------------------------- user.course
3027: } elsif ($space eq 'course') {
3028: # FIXME - not supporting calls for a specific user
3029: return $ENV{join('.',('request.course',$qualifier))};
3030: # ------------------------------------------------------------------- user.role
3031: } elsif ($space eq 'role') {
3032: # FIXME - not supporting calls for a specific user
3033: my ($role,$where)=split(/\./,$ENV{'request.role'});
3034: if ($qualifier eq 'value') {
3035: return $role;
3036: } elsif ($qualifier eq 'extent') {
3037: return $where;
3038: }
3039: # ----------------------------------------------------------------- user.domain
3040: } elsif ($space eq 'domain') {
3041: return $udom;
3042: # ------------------------------------------------------------------- user.name
3043: } elsif ($space eq 'name') {
3044: return $uname;
3045: # ---------------------------------------------------- Any other user namespace
3046: } else {
3047: my %reply=&get($space,[$qualifierrest],$udom,$uname);
3048: return $reply{$qualifierrest};
3049: }
3050: } elsif ($realm eq 'query') {
3051: # ---------------------------------------------- pull stuff out of query string
3052: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
3053: return $ENV{'form.'.$space};
3054: } elsif ($realm eq 'request') {
3055: # ------------------------------------------------------------- request.browser
3056: if ($space eq 'browser') {
3057: return $ENV{'browser.'.$qualifier};
3058: # ------------------------------------------------------------ request.filename
3059: } else {
3060: return $ENV{'request.'.$spacequalifierrest};
3061: }
3062: } elsif ($realm eq 'course') {
3063: # ---------------------------------------------------------- course.description
3064: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3065: } elsif ($realm eq 'resource') {
3066:
3067: if ($courseid eq $ENV{'request.course.id'}) {
3068:
3069: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3070:
3071: # ----------------------------------------------------- Cascading lookup scheme
3072: if (!$symbparm) { $symbparm=&symbread(); }
3073: my $symbp=$symbparm;
3074: my $mapp=(split(/\_\_\_/,$symbp))[0];
3075:
3076: my $symbparm=$symbp.'.'.$spacequalifierrest;
3077: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3078:
3079: my $section;
3080: if (($ENV{'user.name'} eq $uname) &&
3081: ($ENV{'user.domain'} eq $udom)) {
3082: $section=$ENV{'request.course.sec'};
3083: } else {
3084: $section=&usection($udom,$uname,$courseid);
3085: }
3086:
3087: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3088: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3089: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3090:
3091: my $courselevel=$courseid.'.'.$spacequalifierrest;
3092: my $courselevelr=$courseid.'.'.$symbparm;
3093: my $courselevelm=$courseid.'.'.$mapparm;
3094:
3095: # ----------------------------------------------------------- first, check user
3096: #most student don't have any data set, check if there is some data
3097: #every thirty minutes
3098: if (!
3099: (exists($ENV{'cache.studentresdata'})
3100: && (($ENV{'cache.studentresdata'}+1800) > time))) {
3101: my %resourcedata=&get('resourcedata',
3102: [$courselevelr,$courselevelm,$courselevel],
3103: $udom,$uname);
3104: my ($tmp)=keys(%resourcedata);
3105: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3106: if ($resourcedata{$courselevelr}) {
3107: return $resourcedata{$courselevelr}; }
3108: if ($resourcedata{$courselevelm}) {
3109: return $resourcedata{$courselevelm}; }
3110: if ($resourcedata{$courselevel}) {
3111: return $resourcedata{$courselevel}; }
3112: } else {
3113: if ($tmp!~/No such file/) {
3114: &logthis("<font color=blue>WARNING:".
3115: " Trying to get resource data for ".
3116: $uname." at ".$udom.": ".
3117: $tmp."</font>");
3118: } elsif ($tmp=~/error:No such file/) {
3119: $ENV{'cache.studentresdata'}=time;
3120: &appenv(('cache.studentresdata'=>
3121: $ENV{'cache.studentresdata'}));
3122: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3123: return $tmp;
3124: }
3125: }
3126: }
3127:
3128: # -------------------------------------------------------- second, check course
3129:
3130: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3131: $ENV{'course.'.$courseid.'.domain'},
3132: ($seclevelr,$seclevelm,$seclevel,
3133: $courselevelr,$courselevelm,
3134: $courselevel));
3135: if (defined($coursereply)) { return $coursereply; }
3136:
3137: # ------------------------------------------------------ third, check map parms
3138: my %parmhash=();
3139: my $thisparm='';
3140: if (tie(%parmhash,'GDBM_File',
3141: $ENV{'request.course.fn'}.'_parms.db',
3142: &GDBM_READER(),0640)) {
3143: $thisparm=$parmhash{$symbparm};
3144: untie(%parmhash);
3145: }
3146: if ($thisparm) { return $thisparm; }
3147: }
3148: # --------------------------------------------- last, look in resource metadata
3149:
3150: $spacequalifierrest=~s/\./\_/;
3151: my $filename;
3152: if (!$symbparm) { $symbparm=&symbread(); }
3153: if ($symbparm) {
3154: $filename=(split(/\_\_\_/,$symbparm))[2];
3155: } else {
3156: $filename=$ENV{'request.filename'};
3157: }
3158: my $metadata=&metadata($filename,$spacequalifierrest);
3159: if (defined($metadata)) { return $metadata; }
3160: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3161: if (defined($metadata)) { return $metadata; }
3162:
3163: # ------------------------------------------------------------------ Cascade up
3164: unless ($space eq '0') {
3165: my @parts=split(/_/,$space);
3166: my $id=pop(@parts);
3167: my $part=join('_',@parts);
3168: if ($part eq '') { $part='0'; }
3169: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3170: $symbparm,$udom,$uname);
3171: if (defined($partgeneral)) { return $partgeneral; }
3172: }
3173:
3174: # ---------------------------------------------------- Any other user namespace
3175: } elsif ($realm eq 'environment') {
3176: # ----------------------------------------------------------------- environment
3177: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3178: return $ENV{'environment.'.$spacequalifierrest};
3179: } else {
3180: my %returnhash=&userenvironment($udom,$uname,
3181: $spacequalifierrest);
3182: return $returnhash{$spacequalifierrest};
3183: }
3184: } elsif ($realm eq 'system') {
3185: # ----------------------------------------------------------------- system.time
3186: if ($space eq 'time') {
3187: return time;
3188: }
3189: }
3190: return '';
3191: }
3192:
3193: sub add_prefix_and_part {
3194: my ($prefix,$part)=@_;
3195: my $keyroot;
3196: if (defined($prefix) && $prefix !~ /^__/) {
3197: # prefix that has a part already
3198: $keyroot=$prefix;
3199: } elsif (defined($prefix)) {
3200: # prefix that is missing a part
3201: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3202: } else {
3203: # no prefix at all
3204: if (defined($part)) { $keyroot='_'.$part; }
3205: }
3206: return $keyroot;
3207: }
3208:
3209: # ---------------------------------------------------------------- Get metadata
3210:
3211: sub metadata {
3212: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3213:
3214: $uri=&declutter($uri);
3215: # if it is a non metadata possible uri return quickly
3216: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3217: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
3218: return '';
3219: }
3220: my $filename=$uri;
3221: $uri=~s/\.meta$//;
3222: #
3223: # Is the metadata already cached?
3224: # Look at timestamp of caching
3225: # Everything is cached by the main uri, libraries are never directly cached
3226: #
3227: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3228: #
3229: # Is this a recursive call for a library?
3230: #
3231: if ($liburi) {
3232: $liburi=&declutter($liburi);
3233: $filename=$liburi;
3234: }
3235: my %metathesekeys=();
3236: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3237: my $metastring=&getfile(&filelocation('',&clutter($filename)));
3238: my $parser=HTML::LCParser->new(\$metastring);
3239: my $token;
3240: undef %metathesekeys;
3241: while ($token=$parser->get_token) {
3242: if ($token->[0] eq 'S') {
3243: if (defined($token->[2]->{'package'})) {
3244: #
3245: # This is a package - get package info
3246: #
3247: my $package=$token->[2]->{'package'};
3248: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3249: if (defined($token->[2]->{'id'})) {
3250: $keyroot.='_'.$token->[2]->{'id'};
3251: }
3252: if ($metacache{$uri.':packages'}) {
3253: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3254: } else {
3255: $metacache{$uri.':packages'}=$package.$keyroot;
3256: }
3257: foreach (keys %packagetab) {
3258: if ($_=~/^$package\&/) {
3259: my ($pack,$name,$subp)=split(/\&/,$_);
3260: my $value=$packagetab{$_};
3261: my $part=$keyroot;
3262: $part=~s/^\_//;
3263: if ($subp eq 'display') {
3264: $value.=' [Part: '.$part.']';
3265: }
3266: my $unikey='parameter'.$keyroot.'_'.$name;
3267: if ($subp eq 'default') { $unikey='parameter_0_'.$name; }
3268: $metathesekeys{$unikey}=1;
3269: $metacache{$uri.':'.$unikey.'.part'}=$part;
3270: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3271: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3272: }
3273: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3274: $metacache{$uri.':'.$unikey}=
3275: $metacache{$uri.':'.$unikey.'.default'}
3276: }
3277: }
3278: }
3279: } else {
3280: #
3281: # This is not a package - some other kind of start tag
3282: #
3283: my $entry=$token->[1];
3284: my $unikey;
3285: if ($entry eq 'import') {
3286: $unikey='';
3287: } else {
3288: $unikey=$entry;
3289: }
3290: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3291:
3292: if (defined($token->[2]->{'id'})) {
3293: $unikey.='_'.$token->[2]->{'id'};
3294: }
3295:
3296: if ($entry eq 'import') {
3297: #
3298: # Importing a library here
3299: #
3300: if ($depthcount<20) {
3301: my $location=$parser->get_text('/import');
3302: my $dir=$filename;
3303: $dir=~s|[^/]*$||;
3304: $location=&filelocation($dir,$location);
3305: foreach (sort(split(/\,/,&metadata($uri,'keys',
3306: $location,$unikey,
3307: $depthcount+1)))) {
3308: $metathesekeys{$_}=1;
3309: }
3310: }
3311: } else {
3312:
3313: if (defined($token->[2]->{'name'})) {
3314: $unikey.='_'.$token->[2]->{'name'};
3315: }
3316: $metathesekeys{$unikey}=1;
3317: foreach (@{$token->[3]}) {
3318: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3319: }
3320: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3321: my $default=$metacache{$uri.':'.$unikey.'.default'};
3322: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3323: # only ws inside the tag, and not in default, so use default
3324: # as value
3325: $metacache{$uri.':'.$unikey}=$default;
3326: } else {
3327: # either something interesting inside the tag or default
3328: # uninteresting
3329: $metacache{$uri.':'.$unikey}=$internaltext;
3330: }
3331: # end of not-a-package not-a-library import
3332: }
3333: # end of not-a-package start tag
3334: }
3335: # the next is the end of "start tag"
3336: }
3337: }
3338: # are there custom rights to evaluate
3339: if ($metacache{$uri.':copyright'} eq 'custom') {
3340:
3341: #
3342: # Importing a rights file here
3343: #
3344: unless ($depthcount) {
3345: my $location=$metacache{$uri.':customdistributionfile'};
3346: my $dir=$filename;
3347: $dir=~s|[^/]*$||;
3348: $location=&filelocation($dir,$location);
3349: foreach (sort(split(/\,/,&metadata($uri,'keys',
3350: $location,'_rights',
3351: $depthcount+1)))) {
3352: $metathesekeys{$_}=1;
3353: }
3354: }
3355: }
3356: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3357: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3358: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3359: $metacache{$uri.':cachedtimestamp'}=time;
3360: # this is the end of "was not already recently cached
3361: }
3362: return $metacache{$uri.':'.$what};
3363: }
3364:
3365: sub metadata_generate_part0 {
3366: my ($metadata,$metacache,$uri) = @_;
3367: my %allnames;
3368: foreach my $metakey (sort keys %$metadata) {
3369: if ($metakey=~/^parameter\_(.*)/) {
3370: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3371: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3372: if (! exists($$metadata{'parameter_0_'.$name})) {
3373: $allnames{$name}=$part;
3374: }
3375: }
3376: }
3377: foreach my $name (keys(%allnames)) {
3378: $$metadata{"parameter_0_$name"}=1;
3379: my $key="$uri:parameter_0_$name";
3380: $$metacache{"$key.part"}='0';
3381: $$metacache{"$key.name"}=$name;
3382: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3383: $allnames{$name}.'_'.$name.
3384: '.type'};
3385: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3386: '.display'};
3387: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3388: $olddis=~s/$expr/\[Part: 0\]/;
3389: $$metacache{"$key.display"}=$olddis;
3390: }
3391: }
3392:
3393: # ------------------------------------------------- Get the title of a resource
3394:
3395: sub gettitle {
3396: my $urlsymb=shift;
3397: my $symb=&symbread($urlsymb);
3398: unless ($symb) {
3399: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3400: return &metadata($urlsymb,'title');
3401: }
3402: if ($titlecache{$symb}) { return $titlecache{$symb}; }
3403: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3404: my $title='';
3405: my %bighash;
3406: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3407: &GDBM_READER(),0640)) {
3408: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3409: $title=$bighash{'title_'.$mapid.'.'.$resid};
3410: untie %bighash;
3411: }
3412: if ($title) {
3413: $titlecache{$symb}=$title;
3414: return $title;
3415: } else {
3416: return &metadata($urlsymb,'title');
3417: }
3418: }
3419:
3420: # ------------------------------------------------- Update symbolic store links
3421:
3422: sub symblist {
3423: my ($mapname,%newhash)=@_;
3424: $mapname=declutter($mapname);
3425: my %hash;
3426: if (($ENV{'request.course.fn'}) && (%newhash)) {
3427: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3428: &GDBM_WRCREAT(),0640)) {
3429: foreach (keys %newhash) {
3430: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3431: }
3432: if (untie(%hash)) {
3433: return 'ok';
3434: }
3435: }
3436: }
3437: return 'error';
3438: }
3439:
3440: # --------------------------------------------------------------- Verify a symb
3441:
3442: sub symbverify {
3443: my ($symb,$thisfn)=@_;
3444: $thisfn=&declutter($thisfn);
3445: # direct jump to resource in page or to a sequence - will construct own symbs
3446: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3447: # check URL part
3448: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3449: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3450:
3451: $symb=&symbclean($symb);
3452:
3453: my %bighash;
3454: my $okay=0;
3455: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3456: &GDBM_READER(),0640)) {
3457: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3458: unless ($ids) {
3459: $ids=$bighash{'ids_/'.$thisfn};
3460: }
3461: if ($ids) {
3462: # ------------------------------------------------------------------- Has ID(s)
3463: foreach (split(/\,/,$ids)) {
3464: my ($mapid,$resid)=split(/\./,$_);
3465: if (
3466: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3467: eq $symb) {
3468: $okay=1;
3469: }
3470: }
3471: }
3472: untie(%bighash);
3473: }
3474: return $okay;
3475: }
3476:
3477: # --------------------------------------------------------------- Clean-up symb
3478:
3479: sub symbclean {
3480: my $symb=shift;
3481:
3482: # remove version from map
3483: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3484:
3485: # remove version from URL
3486: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3487:
3488: return $symb;
3489: }
3490:
3491: # ------------------------------------------------------ Return symb list entry
3492:
3493: sub symbread {
3494: my ($thisfn,$donotrecurse)=@_;
3495: # no filename provided? try from environment
3496: unless ($thisfn) {
3497: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3498: $thisfn=$ENV{'request.filename'};
3499: }
3500: # is that filename actually a symb? Verify, clean, and return
3501: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3502: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3503: }
3504: $thisfn=declutter($thisfn);
3505: my %hash;
3506: my %bighash;
3507: my $syval='';
3508: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3509: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3510: &GDBM_READER(),0640)) {
3511: $syval=$hash{$thisfn};
3512: untie(%hash);
3513: }
3514: # ---------------------------------------------------------- There was an entry
3515: if ($syval) {
3516: unless ($syval=~/\_\d+$/) {
3517: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3518: &appenv('request.ambiguous' => $thisfn);
3519: return '';
3520: }
3521: $syval.=$1;
3522: }
3523: } else {
3524: # ------------------------------------------------------- Was not in symb table
3525: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3526: &GDBM_READER(),0640)) {
3527: # ---------------------------------------------- Get ID(s) for current resource
3528: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3529: unless ($ids) {
3530: $ids=$bighash{'ids_/'.$thisfn};
3531: }
3532: unless ($ids) {
3533: # alias?
3534: $ids=$bighash{'mapalias_'.$thisfn};
3535: }
3536: if ($ids) {
3537: # ------------------------------------------------------------------- Has ID(s)
3538: my @possibilities=split(/\,/,$ids);
3539: if ($#possibilities==0) {
3540: # ----------------------------------------------- There is only one possibility
3541: my ($mapid,$resid)=split(/\./,$ids);
3542: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3543: } elsif (!$donotrecurse) {
3544: # ------------------------------------------ There is more than one possibility
3545: my $realpossible=0;
3546: foreach (@possibilities) {
3547: my $file=$bighash{'src_'.$_};
3548: if (&allowed('bre',$file)) {
3549: my ($mapid,$resid)=split(/\./,$_);
3550: if ($bighash{'map_type_'.$mapid} ne 'page') {
3551: $realpossible++;
3552: $syval=declutter($bighash{'map_id_'.$mapid}).
3553: '___'.$resid;
3554: }
3555: }
3556: }
3557: if ($realpossible!=1) { $syval=''; }
3558: } else {
3559: $syval='';
3560: }
3561: }
3562: untie(%bighash)
3563: }
3564: }
3565: if ($syval) {
3566: return &symbclean($syval.'___'.$thisfn);
3567: }
3568: }
3569: &appenv('request.ambiguous' => $thisfn);
3570: return '';
3571: }
3572:
3573: # ---------------------------------------------------------- Return random seed
3574:
3575: sub numval {
3576: my $txt=shift;
3577: $txt=~tr/A-J/0-9/;
3578: $txt=~tr/a-j/0-9/;
3579: $txt=~tr/K-T/0-9/;
3580: $txt=~tr/k-t/0-9/;
3581: $txt=~tr/U-Z/0-5/;
3582: $txt=~tr/u-z/0-5/;
3583: $txt=~s/\D//g;
3584: return int($txt);
3585: }
3586:
3587: sub rndseed {
3588: my ($symb,$courseid,$domain,$username)=@_;
3589: if (!$symb) {
3590: unless ($symb=&symbread()) { return time; }
3591: }
3592: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3593: if (!$domain) {$domain=$ENV{'user.domain'};}
3594: if (!$username) {$username=$ENV{'user.name'};}
3595: {
3596: use integer;
3597: my $symbchck=unpack("%32C*",$symb) << 27;
3598: my $symbseed=numval($symb) << 22;
3599: my $namechck=unpack("%32C*",$username) << 17;
3600: my $nameseed=numval($username) << 12;
3601: my $domainseed=unpack("%32C*",$domain) << 7;
3602: my $courseseed=unpack("%32C*",$courseid);
3603: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3604: #uncommenting these lines can break things!
3605: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3606: #&Apache::lonxml::debug("rndseed :$num:$symb");
3607: return $num;
3608: }
3609: }
3610:
3611: sub ireceipt {
3612: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3613: my $cuname=unpack("%32C*",$funame);
3614: my $cudom=unpack("%32C*",$fudom);
3615: my $cucourseid=unpack("%32C*",$fucourseid);
3616: my $cusymb=unpack("%32C*",$fusymb);
3617: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3618: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3619: ($cunique%$cuname+
3620: $cunique%$cudom+
3621: $cusymb%$cuname+
3622: $cusymb%$cudom+
3623: $cucourseid%$cuname+
3624: $cucourseid%$cudom);
3625: }
3626:
3627: sub receipt {
3628: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3629: return &ireceipt($name,$domain,$courseid,$symb);
3630: }
3631:
3632: # ------------------------------------------------------------ Serves up a file
3633: # returns either the contents of the file or a -1
3634: sub getfile {
3635: my $file=shift;
3636: if ($file=~/^\/*uploaded\//) { # user file
3637: my $ua=new LWP::UserAgent;
3638: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3639: my $response=$ua->request($request);
3640: if ($response->is_success()) {
3641: return $response->content;
3642: } else {
3643: return -1;
3644: }
3645: } else { # normal file from res space
3646: &repcopy($file);
3647: if (! -e $file ) { return -1; };
3648: my $fh=Apache::File->new($file);
3649: my $a='';
3650: while (<$fh>) { $a .=$_; }
3651: return $a;
3652: }
3653: }
3654:
3655: sub filelocation {
3656: my ($dir,$file) = @_;
3657: my $location;
3658: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3659: if ($file=~m:^/~:) { # is a contruction space reference
3660: $location = $file;
3661: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3662: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3663: $location=$file;
3664: } else {
3665: $file=~s/^$perlvar{'lonDocRoot'}//;
3666: $file=~s:^/*res::;
3667: if ( !( $file =~ m:^/:) ) {
3668: $location = $dir. '/'.$file;
3669: } else {
3670: $location = '/home/httpd/html/res'.$file;
3671: }
3672: }
3673: $location=~s://+:/:g; # remove duplicate /
3674: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3675: return $location;
3676: }
3677:
3678: sub hreflocation {
3679: my ($dir,$file)=@_;
3680: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3681: my $finalpath=filelocation($dir,$file);
3682: $finalpath=~s/^\/home\/httpd\/html//;
3683: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3684: return $finalpath;
3685: } else {
3686: return $file;
3687: }
3688: }
3689:
3690: # ------------------------------------------------------------- Declutters URLs
3691:
3692: sub declutter {
3693: my $thisfn=shift;
3694: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3695: $thisfn=~s/^\///;
3696: $thisfn=~s/^res\///;
3697: $thisfn=~s/\?.+$//;
3698: return $thisfn;
3699: }
3700:
3701: # ------------------------------------------------------------- Clutter up URLs
3702:
3703: sub clutter {
3704: my $thisfn='/'.&declutter(shift);
3705: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3706: $thisfn='/res'.$thisfn;
3707: }
3708: return $thisfn;
3709: }
3710:
3711: # -------------------------------------------------------- Escape Special Chars
3712:
3713: sub escape {
3714: my $str=shift;
3715: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3716: return $str;
3717: }
3718:
3719: # ----------------------------------------------------- Un-Escape Special Chars
3720:
3721: sub unescape {
3722: my $str=shift;
3723: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3724: return $str;
3725: }
3726:
3727: # ================================================================ Main Program
3728:
3729: sub goodbye {
3730: &logthis("Starting Shut down");
3731: &flushcourselogs();
3732: &logthis("Shutting down");
3733: }
3734:
3735: BEGIN {
3736: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3737: unless ($readit) {
3738: {
3739: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3740:
3741: while (my $configline=<$config>) {
3742: if ($configline =~ /^[^\#]*PerlSetVar/) {
3743: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3744: chomp($varvalue);
3745: $perlvar{$varname}=$varvalue;
3746: }
3747: }
3748: }
3749: {
3750: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3751:
3752: while (my $configline=<$config>) {
3753: if ($configline =~ /^[^\#]*PerlSetVar/) {
3754: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3755: chomp($varvalue);
3756: $perlvar{$varname}=$varvalue;
3757: }
3758: }
3759: }
3760:
3761: # ------------------------------------------------------------ Read domain file
3762: {
3763: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
3764: '/domain.tab');
3765: %domaindescription = ();
3766: %domain_auth_def = ();
3767: %domain_auth_arg_def = ();
3768: if ($fh) {
3769: while (<$fh>) {
3770: next if /^\#/;
3771: chomp;
3772: my ($domain, $domain_description, $def_auth, $def_auth_arg)
3773: = split(/:/,$_,4);
3774: $domain_auth_def{$domain}=$def_auth;
3775: $domain_auth_arg_def{$domain}=$def_auth_arg;
3776: $domaindescription{$domain}=$domain_description;
3777: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
3778: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
3779: }
3780: }
3781: }
3782:
3783:
3784: # ------------------------------------------------------------- Read hosts file
3785: {
3786: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3787:
3788: while (my $configline=<$config>) {
3789: next if ($configline =~ /^(\#|\s*$)/);
3790: chomp($configline);
3791: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3792: if ($id && $domain && $role && $name && $ip) {
3793: $hostname{$id}=$name;
3794: $hostdom{$id}=$domain;
3795: $hostip{$id}=$ip;
3796: $iphost{$ip}=$id;
3797: if ($role eq 'library') { $libserv{$id}=$name; }
3798: } else {
3799: if ($configline) {
3800: &logthis("Skipping hosts.tab line -$configline-");
3801: }
3802: }
3803: }
3804: }
3805:
3806: # ------------------------------------------------------ Read spare server file
3807: {
3808: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3809:
3810: while (my $configline=<$config>) {
3811: chomp($configline);
3812: if ($configline) {
3813: $spareid{$configline}=1;
3814: }
3815: }
3816: }
3817: # ------------------------------------------------------------ Read permissions
3818: {
3819: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3820:
3821: while (my $configline=<$config>) {
3822: chomp($configline);
3823: if ($configline) {
3824: my ($role,$perm)=split(/ /,$configline);
3825: if ($perm ne '') { $pr{$role}=$perm; }
3826: }
3827: }
3828: }
3829:
3830: # -------------------------------------------- Read plain texts for permissions
3831: {
3832: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3833:
3834: while (my $configline=<$config>) {
3835: chomp($configline);
3836: if ($configline) {
3837: my ($short,$plain)=split(/:/,$configline);
3838: if ($plain ne '') { $prp{$short}=$plain; }
3839: }
3840: }
3841: }
3842:
3843: # ---------------------------------------------------------- Read package table
3844: {
3845: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3846:
3847: while (my $configline=<$config>) {
3848: chomp($configline);
3849: my ($short,$plain)=split(/:/,$configline);
3850: my ($pack,$name)=split(/\&/,$short);
3851: if ($plain ne '') {
3852: $packagetab{$pack.'&'.$name.'&name'}=$name;
3853: $packagetab{$short}=$plain;
3854: }
3855: }
3856: }
3857:
3858: # ------------- set up temporary directory
3859: {
3860: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
3861:
3862: }
3863:
3864: %metacache=();
3865:
3866: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
3867: $dumpcount=0;
3868:
3869: &logtouch();
3870: &logthis('<font color=yellow>INFO: Read configuration</font>');
3871: $readit=1;
3872: }
3873: }
3874:
3875: 1;
3876: __END__
3877:
3878: =pod
3879:
3880: =head1 NAME
3881:
3882: Apache::lonnet - Subroutines to ask questions about things in the network.
3883:
3884: =head1 SYNOPSIS
3885:
3886: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3887:
3888: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3889:
3890: Common parameters:
3891:
3892: =over 4
3893:
3894: =item *
3895:
3896: $uname : an internal username (if $cname expecting a course Id specifically)
3897:
3898: =item *
3899:
3900: $udom : a domain (if $cdom expecting a course's domain specifically)
3901:
3902: =item *
3903:
3904: $symb : a resource instance identifier
3905:
3906: =item *
3907:
3908: $namespace : the name of a .db file that contains the data needed or
3909: being set.
3910:
3911: =back
3912:
3913: =head1 INTRODUCTION
3914:
3915: This module provides subroutines which interact with the
3916: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
3917: - classes
3918: - users
3919: - resources
3920:
3921: For many of these objects you can also use this to store data about
3922: them or modify them in various ways.
3923:
3924: This is part of the LearningOnline Network with CAPA project
3925: described at http://www.lon-capa.org.
3926:
3927: =head1 RETURN MESSAGES
3928:
3929: =over 4
3930:
3931: =item *
3932:
3933: con_lost : unable to contact remote host
3934:
3935: =item *
3936:
3937: con_delayed : unable to contact remote host, message will be delivered
3938: when the connection is brought back up
3939:
3940: =item *
3941:
3942: con_failed : unable to contact remote host and unable to save message
3943: for later delivery
3944:
3945: =item *
3946:
3947: error: : an error a occured, a description of the error follows the :
3948:
3949: =item *
3950:
3951: no_such_host : unable to fund a host associated with the user/domain
3952: that was requested
3953:
3954: =back
3955:
3956: =head1 PUBLIC SUBROUTINES
3957:
3958: =head2 Session Environment Functions
3959:
3960: =over 4
3961:
3962: =item *
3963:
3964: appenv(%hash) : the value of %hash is written to the user envirnoment
3965: file, and will be restored for each access this user makes during this
3966: session, also modifies the %ENV for the current process
3967:
3968: =item *
3969:
3970: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
3971:
3972: =back
3973:
3974: =head2 User Information
3975:
3976: =over 4
3977:
3978: =item *
3979:
3980: queryauthenticate($uname,$udom) : try to determine user's current
3981: authentication scheme
3982:
3983: =item *
3984:
3985: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
3986: servers (first use the current one), $upass should be the users password
3987:
3988: =item *
3989:
3990: homeserver($uname,$udom) : find the server which has the user's
3991: directory and files (there must be only one), this caches the answer,
3992: and also caches if there is a borken connection.
3993:
3994: =item *
3995:
3996: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
3997: unique resource in a domain, there must be only 1 ID per username, and
3998: only 1 username per ID in a specific domain) (returns hash:
3999: id=>name,id=>name)
4000:
4001: =item *
4002:
4003: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
4004: name=>id,name=>id)
4005:
4006: =item *
4007:
4008: idput($udom,%ids) : store away a list of names and associated IDs
4009:
4010: =item *
4011:
4012: rolesinit($udom,$username,$authhost) : get user privileges
4013:
4014: =item *
4015:
4016: usection($udom,$uname,$cname) : finds the section of student in the
4017: course $cname, return section name/number or '' for "not in course"
4018: and '-1' for "no section"
4019:
4020: =item *
4021:
4022: userenvironment($udom,$uname,@what) : gets the values of the keys
4023: passed in @what from the requested user's environment, returns a hash
4024:
4025: =back
4026:
4027: =head2 User Roles
4028:
4029: =over 4
4030:
4031: =item *
4032:
4033: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
4034: actions
4035: F: full access
4036: U,I,K: authentication modes (cxx only)
4037: '': forbidden
4038: 1: user needs to choose course
4039: 2: browse allowed
4040:
4041: =item *
4042:
4043: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4044: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4045: and course level
4046:
4047: =item *
4048:
4049: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4050: explanation of a user role term
4051:
4052: =back
4053:
4054: =head2 User Modification
4055:
4056: =over 4
4057:
4058: =item *
4059:
4060: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4061: user for the level given by URL. Optional start and end dates (leave empty
4062: string or zero for "no date")
4063:
4064: =item *
4065:
4066: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4067: change a users, password, possible return values are: ok,
4068: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4069: refused
4070:
4071: =item *
4072:
4073: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
4074:
4075: =item *
4076:
4077: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4078: modify user
4079:
4080: =item *
4081:
4082: modifystudent
4083:
4084: modify a students enrollment and identification information.
4085: The course id is resolved based on the current users environment.
4086: This means the envoking user must be a course coordinator or otherwise
4087: associated with a course.
4088:
4089: This call is essentially a wrapper for lonnet::modifyuser and
4090: lonnet::modify_student_enrollment
4091:
4092: Inputs:
4093:
4094: =over 4
4095:
4096: =item B<$udom> Students loncapa domain
4097:
4098: =item B<$uname> Students loncapa login name
4099:
4100: =item B<$uid> Students id/student number
4101:
4102: =item B<$umode> Students authentication mode
4103:
4104: =item B<$upass> Students password
4105:
4106: =item B<$first> Students first name
4107:
4108: =item B<$middle> Students middle name
4109:
4110: =item B<$last> Students last name
4111:
4112: =item B<$gene> Students generation
4113:
4114: =item B<$usec> Students section in course
4115:
4116: =item B<$end> Unix time of the roles expiration
4117:
4118: =item B<$start> Unix time of the roles start date
4119:
4120: =item B<$forceid> If defined, allow $uid to be changed
4121:
4122: =item B<$desiredhome> server to use as home server for student
4123:
4124: =back
4125:
4126: =item *
4127:
4128: modify_student_enrollment
4129:
4130: Change a students enrollment status in a class. The environment variable
4131: 'role.request.course' must be defined for this function to proceed.
4132:
4133: Inputs:
4134:
4135: =over 4
4136:
4137: =item $udom, students domain
4138:
4139: =item $uname, students name
4140:
4141: =item $uid, students user id
4142:
4143: =item $first, students first name
4144:
4145: =item $middle
4146:
4147: =item $last
4148:
4149: =item $gene
4150:
4151: =item $usec
4152:
4153: =item $end
4154:
4155: =item $start
4156:
4157: =back
4158:
4159:
4160: =item *
4161:
4162: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4163: custom role; give a custom role to a user for the level given by URL. Specify
4164: name and domain of role author, and role name
4165:
4166: =item *
4167:
4168: revokerole($udom,$uname,$url,$role) : revoke a role for url
4169:
4170: =item *
4171:
4172: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4173:
4174: =back
4175:
4176: =head2 Course Infomation
4177:
4178: =over 4
4179:
4180: =item *
4181:
4182: coursedescription($courseid) : course description
4183:
4184: =item *
4185:
4186: courseresdata($coursenum,$coursedomain,@which) : request for current
4187: parameter setting for a specific course, @what should be a list of
4188: parameters to ask about. This routine caches answers for 5 minutes.
4189:
4190: =back
4191:
4192: =head2 Course Modification
4193:
4194: =over 4
4195:
4196: =item *
4197:
4198: writecoursepref($courseid,%prefs) : write preferences (environment
4199: database) for a course
4200:
4201: =item *
4202:
4203: createcourse($udom,$description,$url) : make/modify course
4204:
4205: =back
4206:
4207: =head2 Resource Subroutines
4208:
4209: =over 4
4210:
4211: =item *
4212:
4213: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
4214:
4215: =item *
4216:
4217: repcopy($filename) : subscribes to the requested file, and attempts to
4218: replicate from the owning library server, Might return
4219: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4220: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4221: resource. Expects the local filesystem pathname
4222: (/home/httpd/html/res/....)
4223:
4224: =back
4225:
4226: =head2 Resource Information
4227:
4228: =over 4
4229:
4230: =item *
4231:
4232: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4233: a vairety of different possible values, $varname should be a request
4234: string, and the other parameters can be used to specify who and what
4235: one is asking about.
4236:
4237: Possible values for $varname are environment.lastname (or other item
4238: from the envirnment hash), user.name (or someother aspect about the
4239: user), resource.0.maxtries (or some other part and parameter of a
4240: resource)
4241:
4242: =item *
4243:
4244: directcondval($number) : get current value of a condition; reads from a state
4245: string
4246:
4247: =item *
4248:
4249: condval($condidx) : value of condition index based on state
4250:
4251: =item *
4252:
4253: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4254: resource's metadata, $what should be either a specific key, or either
4255: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4256: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4257:
4258: this function automatically caches all requests
4259:
4260: =item *
4261:
4262: metadata_query($query,$custom,$customshow) : make a metadata query against the
4263: network of library servers; returns file handle of where SQL and regex results
4264: will be stored for query
4265:
4266: =item *
4267:
4268: symbread($filename) : return symbolic list entry (filename argument optional);
4269: returns the data handle
4270:
4271: =item *
4272:
4273: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4274: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4275: failure, user must be in a course, as it assumes the existance of the
4276: course initi hash, and uses $ENV('request.course.id'}
4277:
4278:
4279: =item *
4280:
4281: symbclean($symb) : removes versions numbers from a symb, returns the
4282: cleaned symb
4283:
4284: =item *
4285:
4286: is_on_map($uri) : checks if the $uri is somewhere on the current
4287: course map, user must be in a course for it to work.
4288:
4289: =item *
4290:
4291: numval($salt) : return random seed value (addend for rndseed)
4292:
4293: =item *
4294:
4295: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4296: a random seed, all arguments are optional, if they aren't sent it uses the
4297: environment to derive them. Note: if symb isn't sent and it can't get one
4298: from &symbread it will use the current time as its return value
4299:
4300: =item *
4301:
4302: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4303: unfakeable, receipt
4304:
4305: =item *
4306:
4307: receipt() : API to ireceipt working off of ENV values; given out to users
4308:
4309: =item *
4310:
4311: countacc($url) : count the number of accesses to a given URL
4312:
4313: =item *
4314:
4315: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4316:
4317: =item *
4318:
4319: checkin($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 $tcrsid)
4320:
4321: =item *
4322:
4323: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4324:
4325: =item *
4326:
4327: devalidate($symb) : devalidate temporary spreadsheet calculations,
4328: forcing spreadsheet to reevaluate the resource scores next time.
4329:
4330: =back
4331:
4332: =head2 Storing/Retreiving Data
4333:
4334: =over 4
4335:
4336: =item *
4337:
4338: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4339: for this url; hashref needs to be given and should be a \%hashname; the
4340: remaining args aren't required and if they aren't passed or are '' they will
4341: be derived from the ENV
4342:
4343: =item *
4344:
4345: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4346: uses critical subroutine
4347:
4348: =item *
4349:
4350: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4351: all args are optional
4352:
4353: =item *
4354:
4355: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4356: works very similar to store/cstore, but all data is stored in a
4357: temporary location and can be reset using tmpreset, $storehash should
4358: be a hash reference, returns nothing on success
4359:
4360: =item *
4361:
4362: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4363: similar to restore, but all data is stored in a temporary location and
4364: can be reset using tmpreset. Returns a hash of values on success,
4365: error string otherwise.
4366:
4367: =item *
4368:
4369: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4370: deltes all keys for $symb form the temporary storage hash.
4371:
4372: =item *
4373:
4374: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4375: reference filled in from namesp ($udom and $uname are optional)
4376:
4377: =item *
4378:
4379: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4380: namesp ($udom and $uname are optional)
4381:
4382: =item *
4383:
4384: dump($namespace,$udom,$uname,$regexp) :
4385: dumps the complete (or key matching regexp) namespace into a hash
4386: ($udom, $uname and $regexp are optional)
4387:
4388: =item *
4389:
4390: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4391: ($udom and $uname are optional)
4392:
4393: =item *
4394:
4395: cput($namespace,$storehash,$udom,$uname) : critical put
4396: ($udom and $uname are optional)
4397:
4398: =item *
4399:
4400: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4401: reference filled in from namesp (encrypts the return communication)
4402: ($udom and $uname are optional)
4403:
4404: =item *
4405:
4406: log($udom,$name,$home,$message) : write to permanent log for user; use
4407: critical subroutine
4408:
4409: =back
4410:
4411: =head2 Network Status Functions
4412:
4413: =over 4
4414:
4415: =item *
4416:
4417: dirlist($uri) : return directory list based on URI
4418:
4419: =item *
4420:
4421: spareserver() : find server with least workload from spare.tab
4422:
4423: =back
4424:
4425: =head2 Apache Request
4426:
4427: =over 4
4428:
4429: =item *
4430:
4431: ssi($url,%hash) : server side include, does a complete request cycle on url to
4432: localhost, posts hash
4433:
4434: =back
4435:
4436: =head2 Data to String to Data
4437:
4438: =over 4
4439:
4440: =item *
4441:
4442: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4443: and '&' separators, supports elements that are arrayrefs and hashrefs
4444:
4445: =item *
4446:
4447: hashref2str($hashref) : convert a hashref into a string complete with
4448: escaping and '=' and '&' separators, supports elements that are
4449: arrayrefs and hashrefs
4450:
4451: =item *
4452:
4453: arrayref2str($arrayref) : convert an arrayref into a string complete
4454: with escaping and '&' separators, supports elements that are arrayrefs
4455: and hashrefs
4456:
4457: =item *
4458:
4459: str2hash($string) : convert string to hash using unescaping and
4460: splitting on '=' and '&', supports elements that are arrayrefs and
4461: hashrefs
4462:
4463: =item *
4464:
4465: str2array($string) : convert string to hash using unescaping and
4466: splitting on '&', supports elements that are arrayrefs and hashrefs
4467:
4468: =back
4469:
4470: =head2 Logging Routines
4471:
4472: =over 4
4473:
4474: These routines allow one to make log messages in the lonnet.log and
4475: lonnet.perm logfiles.
4476:
4477: =item *
4478:
4479: logtouch() : make sure the logfile, lonnet.log, exists
4480:
4481: =item *
4482:
4483: logthis() : append message to the normal lonnet.log file, it gets
4484: preiodically rolled over and deleted.
4485:
4486: =item *
4487:
4488: logperm() : append a permanent message to lonnet.perm.log, this log
4489: file never gets deleted by any automated portion of the system, only
4490: messages of critical importance should go in here.
4491:
4492: =back
4493:
4494: =head2 General File Helper Routines
4495:
4496: =over 4
4497:
4498: =item *
4499:
4500: getfile($file) : returns the entire contents of a file or -1; it
4501: properly subscribes to and replicates the file if neccessary.
4502:
4503: =item *
4504:
4505: filelocation($dir,$file) : returns file system location of a file
4506: based on URI; meant to be "fairly clean" absolute reference, $dir is a
4507: directory that relative $file lookups are to looked in ($dir of /a/dir
4508: and a file of ../bob will become /a/bob)
4509:
4510: =item *
4511:
4512: hreflocation($dir,$file) : returns file system location or a URL; same as
4513: filelocation except for hrefs
4514:
4515: =item *
4516:
4517: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
4518:
4519: =back
4520:
4521: =head2 HTTP Helper Routines
4522:
4523: =over 4
4524:
4525: =item *
4526:
4527: escape() : unpack non-word characters into CGI-compatible hex codes
4528:
4529: =item *
4530:
4531: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
4532:
4533: =back
4534:
4535: =head1 PRIVATE SUBROUTINES
4536:
4537: =head2 Underlying communication routines (Shouldn't call)
4538:
4539: =over 4
4540:
4541: =item *
4542:
4543: subreply() : tries to pass a message to lonc, returns con_lost if incapable
4544:
4545: =item *
4546:
4547: reply() : uses subreply to send a message to remote machine, logs all failures
4548:
4549: =item *
4550:
4551: critical() : passes a critical message to another server; if cannot
4552: get through then place message in connection buffer directory and
4553: returns con_delayed, if incapable of saving message, returns
4554: con_failed
4555:
4556: =item *
4557:
4558: reconlonc() : tries to reconnect lonc client processes.
4559:
4560: =back
4561:
4562: =head2 Resource Access Logging
4563:
4564: =over 4
4565:
4566: =item *
4567:
4568: flushcourselogs() : flush (save) buffer logs and access logs
4569:
4570: =item *
4571:
4572: courselog($what) : save message for course in hash
4573:
4574: =item *
4575:
4576: courseacclog($what) : save message for course using &courselog(). Perform
4577: special processing for specific resource types (problems, exams, quizzes, etc).
4578:
4579: =item *
4580:
4581: goodbye() : flush course logs and log shutting down; it is called in srm.conf
4582: as a PerlChildExitHandler
4583:
4584: =back
4585:
4586: =head2 Other
4587:
4588: =over 4
4589:
4590: =item *
4591:
4592: symblist($mapname,%newhash) : update symbolic storage links
4593:
4594: =back
4595:
4596: =cut
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