1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.354 2003/03/26 15:49:02 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 %coursenumbuf %coursehombuf %coursedescrbuf %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: # This routine flushes several buffers of non-mission-critical nature
1032: #
1033:
1034: sub flushcourselogs {
1035: &logthis('Flushing log buffers');
1036: #
1037: # course logs
1038: # This is a log of all transactions in a course, which can be used
1039: # for data mining purposes
1040: #
1041: # It also collects the courseid database, which lists last transaction
1042: # times and course titles for all courseids
1043: #
1044: my %courseidbuffer=();
1045: foreach (keys %courselogs) {
1046: my $crsid=$_;
1047: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1048: &escape($courselogs{$crsid}),
1049: $coursehombuf{$crsid}) eq 'ok') {
1050: delete $courselogs{$crsid};
1051: } else {
1052: &logthis('Failed to flush log buffer for '.$crsid);
1053: if (length($courselogs{$crsid})>40000) {
1054: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1055: " exceeded maximum size, deleting.</font>");
1056: delete $courselogs{$crsid};
1057: }
1058: }
1059: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1060: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1061: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1062: } else {
1063: $courseidbuffer{$coursehombuf{$crsid}}=
1064: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1065: }
1066: }
1067: #
1068: # Write course id database (reverse lookup) to homeserver of courses
1069: # Is used in pickcourse
1070: #
1071: foreach (keys %courseidbuffer) {
1072: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1073: }
1074: #
1075: # File accesses
1076: # Writes to the dynamic metadata of resources to get hit counts, etc.
1077: #
1078: foreach (keys %accesshash) {
1079: my $entry=$_;
1080: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
1081: my %temphash=($entry => $accesshash{$entry});
1082: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
1083: delete $accesshash{$entry};
1084: }
1085: }
1086: #
1087: # Roles
1088: # Reverse lookup of user roles for course faculty/staff and co-authorship
1089: #
1090: foreach (keys %userrolehash) {
1091: my $entry=$_;
1092: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1093: split(/\:/,$entry);
1094: if (&Apache::lonnet::put('nohist_userroles',
1095: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1096: $rudom,$runame) eq 'ok') {
1097: delete $userrolehash{$entry};
1098: }
1099: }
1100: $dumpcount++;
1101: }
1102:
1103: sub courselog {
1104: my $what=shift;
1105: $what=time.':'.$what;
1106: unless ($ENV{'request.course.id'}) { return ''; }
1107: $coursedombuf{$ENV{'request.course.id'}}=
1108: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1109: $coursenumbuf{$ENV{'request.course.id'}}=
1110: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1111: $coursehombuf{$ENV{'request.course.id'}}=
1112: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1113: $coursedescrbuf{$ENV{'request.course.id'}}=
1114: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1115: if (defined $courselogs{$ENV{'request.course.id'}}) {
1116: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1117: } else {
1118: $courselogs{$ENV{'request.course.id'}}.=$what;
1119: }
1120: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1121: &flushcourselogs();
1122: }
1123: }
1124:
1125: sub courseacclog {
1126: my $fnsymb=shift;
1127: unless ($ENV{'request.course.id'}) { return ''; }
1128: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1129: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form)$/) {
1130: $what.=':POST';
1131: foreach (keys %ENV) {
1132: if ($_=~/^form\.(.*)/) {
1133: $what.=':'.$1.'='.$ENV{$_};
1134: }
1135: }
1136: }
1137: &courselog($what);
1138: }
1139:
1140: sub countacc {
1141: my $url=&declutter(shift);
1142: unless ($ENV{'request.course.id'}) { return ''; }
1143: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1144: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1145: if (defined($accesshash{$key})) {
1146: $accesshash{$key}++;
1147: } else {
1148: $accesshash{$key}=1;
1149: }
1150: }
1151:
1152: sub userrolelog {
1153: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1154: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1155: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1156: ($trole=~/^cr/)) {
1157: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1158: $userrolehash
1159: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1160: =$tend.':'.$tstart;
1161: }
1162: }
1163:
1164: sub get_course_adv_roles {
1165: my $cid=shift;
1166: $cid=$ENV{'request.course.id'} unless (defined($cid));
1167: my %coursehash=&coursedescription($cid);
1168: my %returnhash=();
1169: my %dumphash=
1170: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1171: my $now=time;
1172: foreach (keys %dumphash) {
1173: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1174: if (($tstart) && ($tstart<0)) { next; }
1175: if (($tend) && ($tend<$now)) { next; }
1176: if (($tstart) && ($now<$tstart)) { next; }
1177: my ($role,$username,$domain,$section)=split(/\:/,$_);
1178: my $key=&plaintext($role);
1179: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1180: if ($returnhash{$key}) {
1181: $returnhash{$key}.=','.$username.':'.$domain;
1182: } else {
1183: $returnhash{$key}=$username.':'.$domain;
1184: }
1185: }
1186: return sort %returnhash;
1187: }
1188:
1189: # ---------------------------------------------------------- Course ID routines
1190: # Deal with domain's nohist_courseid.db files
1191: #
1192:
1193: sub courseidput {
1194: my ($domain,$what,$coursehome)=@_;
1195: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1196: }
1197:
1198: sub courseiddump {
1199: my ($domfilter,$descfilter,$sincefilter)=@_;
1200: my %returnhash=();
1201: foreach my $tryserver (keys %libserv) {
1202: if ($hostdom{$tryserver}=~/$domfilter/) {
1203: foreach (
1204: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1205: $sincefilter.':'.&escape($descfilter),
1206: $tryserver))) {
1207: my ($key,$value)=split(/\=/,$_);
1208: if (($key) && ($value)) {
1209: $returnhash{&unescape($key)}=&unescape($value);
1210: }
1211: }
1212:
1213: }
1214: }
1215: return %returnhash;
1216: }
1217:
1218: #
1219: # ----------------------------------------------------------- Check out an item
1220:
1221: sub checkout {
1222: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1223: my $now=time;
1224: my $lonhost=$perlvar{'lonHostID'};
1225: my $infostr=&escape(
1226: 'CHECKOUTTOKEN&'.
1227: $tuname.'&'.
1228: $tudom.'&'.
1229: $tcrsid.'&'.
1230: $symb.'&'.
1231: $now.'&'.$ENV{'REMOTE_ADDR'});
1232: my $token=&reply('tmpput:'.$infostr,$lonhost);
1233: if ($token=~/^error\:/) {
1234: &logthis("<font color=blue>WARNING: ".
1235: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1236: "</font>");
1237: return '';
1238: }
1239:
1240: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1241: $token=~tr/a-z/A-Z/;
1242:
1243: my %infohash=('resource.0.outtoken' => $token,
1244: 'resource.0.checkouttime' => $now,
1245: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1246:
1247: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1248: return '';
1249: } else {
1250: &logthis("<font color=blue>WARNING: ".
1251: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1252: "</font>");
1253: }
1254:
1255: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1256: &escape('Checkout '.$infostr.' - '.
1257: $token)) ne 'ok') {
1258: return '';
1259: } else {
1260: &logthis("<font color=blue>WARNING: ".
1261: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1262: "</font>");
1263: }
1264: return $token;
1265: }
1266:
1267: # ------------------------------------------------------------ Check in an item
1268:
1269: sub checkin {
1270: my $token=shift;
1271: my $now=time;
1272: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1273: $lonhost=~tr/A-Z/a-z/;
1274: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1275: $dtoken=~s/\W/\_/g;
1276: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1277: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1278:
1279: unless (($tuname) && ($tudom)) {
1280: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1281: return '';
1282: }
1283:
1284: unless (&allowed('mgr',$tcrsid)) {
1285: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1286: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1287: return '';
1288: }
1289:
1290: my %infohash=('resource.0.intoken' => $token,
1291: 'resource.0.checkintime' => $now,
1292: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1293:
1294: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1295: return '';
1296: }
1297:
1298: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1299: &escape('Checkin - '.$token)) ne 'ok') {
1300: return '';
1301: }
1302:
1303: return ($symb,$tuname,$tudom,$tcrsid);
1304: }
1305:
1306: # --------------------------------------------- Set Expire Date for Spreadsheet
1307:
1308: sub expirespread {
1309: my ($uname,$udom,$stype,$usymb)=@_;
1310: my $cid=$ENV{'request.course.id'};
1311: if ($cid) {
1312: my $now=time;
1313: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1314: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1315: $ENV{'course.'.$cid.'.num'}.
1316: ':nohist_expirationdates:'.
1317: &escape($key).'='.$now,
1318: $ENV{'course.'.$cid.'.home'})
1319: }
1320: return 'ok';
1321: }
1322:
1323: # ----------------------------------------------------- Devalidate Spreadsheets
1324:
1325: sub devalidate {
1326: my ($symb,$uname,$udom)=@_;
1327: my $cid=$ENV{'request.course.id'};
1328: if ($cid) {
1329: # delete the stored spreadsheets for
1330: # - the student level sheet of this user in course's homespace
1331: # - the assessment level sheet for this resource
1332: # for this user in user's homespace
1333: my $key=$uname.':'.$udom.':';
1334: my $status=
1335: &del('nohist_calculatedsheets',
1336: [$key.'studentcalc'],
1337: $ENV{'course.'.$cid.'.domain'},
1338: $ENV{'course.'.$cid.'.num'})
1339: .' '.
1340: &del('nohist_calculatedsheets_'.$cid,
1341: [$key.'assesscalc:'.$symb]);
1342: unless ($status eq 'ok ok') {
1343: &logthis('Could not devalidate spreadsheet '.
1344: $uname.' at '.$udom.' for '.
1345: $symb.': '.$status);
1346: }
1347: }
1348: }
1349:
1350: sub get_scalar {
1351: my ($string,$end) = @_;
1352: my $value;
1353: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1354: $value = $1;
1355: } elsif ($$string =~ s/^([^&]*?)&//) {
1356: $value = $1;
1357: }
1358: return &unescape($value);
1359: }
1360:
1361: sub array2str {
1362: my (@array) = @_;
1363: my $result=&arrayref2str(\@array);
1364: $result=~s/^__ARRAY_REF__//;
1365: $result=~s/__END_ARRAY_REF__$//;
1366: return $result;
1367: }
1368:
1369: sub arrayref2str {
1370: my ($arrayref) = @_;
1371: my $result='__ARRAY_REF__';
1372: foreach my $elem (@$arrayref) {
1373: if(ref($elem) eq 'ARRAY') {
1374: $result.=&arrayref2str($elem).'&';
1375: } elsif(ref($elem) eq 'HASH') {
1376: $result.=&hashref2str($elem).'&';
1377: } elsif(ref($elem)) {
1378: #print("Got a ref of ".(ref($elem))." skipping.");
1379: } else {
1380: $result.=&escape($elem).'&';
1381: }
1382: }
1383: $result=~s/\&$//;
1384: $result .= '__END_ARRAY_REF__';
1385: return $result;
1386: }
1387:
1388: sub hash2str {
1389: my (%hash) = @_;
1390: my $result=&hashref2str(\%hash);
1391: $result=~s/^__HASH_REF__//;
1392: $result=~s/__END_HASH_REF__$//;
1393: return $result;
1394: }
1395:
1396: sub hashref2str {
1397: my ($hashref)=@_;
1398: my $result='__HASH_REF__';
1399: foreach (keys(%$hashref)) {
1400: if (ref($_) eq 'ARRAY') {
1401: $result.=&arrayref2str($_).'=';
1402: } elsif (ref($_) eq 'HASH') {
1403: $result.=&hashref2str($_).'=';
1404: } elsif (ref($_)) {
1405: $result.='=';
1406: #print("Got a ref of ".(ref($_))." skipping.");
1407: } else {
1408: if ($_) {$result.=&escape($_).'=';} else { last; }
1409: }
1410:
1411: if(ref($hashref->{$_}) eq 'ARRAY') {
1412: $result.=&arrayref2str($hashref->{$_}).'&';
1413: } elsif(ref($hashref->{$_}) eq 'HASH') {
1414: $result.=&hashref2str($hashref->{$_}).'&';
1415: } elsif(ref($hashref->{$_})) {
1416: $result.='&';
1417: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1418: } else {
1419: $result.=&escape($hashref->{$_}).'&';
1420: }
1421: }
1422: $result=~s/\&$//;
1423: $result .= '__END_HASH_REF__';
1424: return $result;
1425: }
1426:
1427: sub str2hash {
1428: my ($string)=@_;
1429: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1430: return %$hash;
1431: }
1432:
1433: sub str2hashref {
1434: my ($string) = @_;
1435:
1436: my %hash;
1437:
1438: if($string !~ /^__HASH_REF__/) {
1439: if (! ($string eq '' || !defined($string))) {
1440: $hash{'error'}='Not hash reference';
1441: }
1442: return (\%hash, $string);
1443: }
1444:
1445: $string =~ s/^__HASH_REF__//;
1446:
1447: while($string !~ /^__END_HASH_REF__/) {
1448: #key
1449: my $key='';
1450: if($string =~ /^__HASH_REF__/) {
1451: ($key, $string)=&str2hashref($string);
1452: if(defined($key->{'error'})) {
1453: $hash{'error'}='Bad data';
1454: return (\%hash, $string);
1455: }
1456: } elsif($string =~ /^__ARRAY_REF__/) {
1457: ($key, $string)=&str2arrayref($string);
1458: if($key->[0] eq 'Array reference error') {
1459: $hash{'error'}='Bad data';
1460: return (\%hash, $string);
1461: }
1462: } else {
1463: $string =~ s/^(.*?)=//;
1464: $key=&unescape($1);
1465: }
1466: $string =~ s/^=//;
1467:
1468: #value
1469: my $value='';
1470: if($string =~ /^__HASH_REF__/) {
1471: ($value, $string)=&str2hashref($string);
1472: if(defined($value->{'error'})) {
1473: $hash{'error'}='Bad data';
1474: return (\%hash, $string);
1475: }
1476: } elsif($string =~ /^__ARRAY_REF__/) {
1477: ($value, $string)=&str2arrayref($string);
1478: if($value->[0] eq 'Array reference error') {
1479: $hash{'error'}='Bad data';
1480: return (\%hash, $string);
1481: }
1482: } else {
1483: $value=&get_scalar(\$string,'__END_HASH_REF__');
1484: }
1485: $string =~ s/^&//;
1486:
1487: $hash{$key}=$value;
1488: }
1489:
1490: $string =~ s/^__END_HASH_REF__//;
1491:
1492: return (\%hash, $string);
1493: }
1494:
1495: sub str2array {
1496: my ($string)=@_;
1497: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1498: return @$array;
1499: }
1500:
1501: sub str2arrayref {
1502: my ($string) = @_;
1503: my @array;
1504:
1505: if($string !~ /^__ARRAY_REF__/) {
1506: if (! ($string eq '' || !defined($string))) {
1507: $array[0]='Array reference error';
1508: }
1509: return (\@array, $string);
1510: }
1511:
1512: $string =~ s/^__ARRAY_REF__//;
1513:
1514: while($string !~ /^__END_ARRAY_REF__/) {
1515: my $value='';
1516: if($string =~ /^__HASH_REF__/) {
1517: ($value, $string)=&str2hashref($string);
1518: if(defined($value->{'error'})) {
1519: $array[0] ='Array reference error';
1520: return (\@array, $string);
1521: }
1522: } elsif($string =~ /^__ARRAY_REF__/) {
1523: ($value, $string)=&str2arrayref($string);
1524: if($value->[0] eq 'Array reference error') {
1525: $array[0] ='Array reference error';
1526: return (\@array, $string);
1527: }
1528: } else {
1529: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1530: }
1531: $string =~ s/^&//;
1532:
1533: push(@array, $value);
1534: }
1535:
1536: $string =~ s/^__END_ARRAY_REF__//;
1537:
1538: return (\@array, $string);
1539: }
1540:
1541: # -------------------------------------------------------------------Temp Store
1542:
1543: sub tmpreset {
1544: my ($symb,$namespace,$domain,$stuname) = @_;
1545: if (!$symb) {
1546: $symb=&symbread();
1547: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
1548: }
1549: $symb=escape($symb);
1550:
1551: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1552: $namespace=~s/\//\_/g;
1553: $namespace=~s/\W//g;
1554:
1555: #FIXME needs to do something for /pub resources
1556: if (!$domain) { $domain=$ENV{'user.domain'}; }
1557: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1558: my $path=$perlvar{'lonDaemons'}.'/tmp';
1559: my %hash;
1560: if (tie(%hash,'GDBM_File',
1561: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1562: &GDBM_WRCREAT(),0640)) {
1563: foreach my $key (keys %hash) {
1564: if ($key=~ /:$symb/) {
1565: delete($hash{$key});
1566: }
1567: }
1568: }
1569: }
1570:
1571: sub tmpstore {
1572: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1573:
1574: if (!$symb) {
1575: $symb=&symbread();
1576: if (!$symb) { $symb= $ENV{'request.url'}; }
1577: }
1578: $symb=escape($symb);
1579:
1580: if (!$namespace) {
1581: # I don't think we would ever want to store this for a course.
1582: # it seems this will only be used if we don't have a course.
1583: #$namespace=$ENV{'request.course.id'};
1584: #if (!$namespace) {
1585: $namespace=$ENV{'request.state'};
1586: #}
1587: }
1588: $namespace=~s/\//\_/g;
1589: $namespace=~s/\W//g;
1590: #FIXME needs to do something for /pub resources
1591: if (!$domain) { $domain=$ENV{'user.domain'}; }
1592: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1593: my $now=time;
1594: my %hash;
1595: my $path=$perlvar{'lonDaemons'}.'/tmp';
1596: if (tie(%hash,'GDBM_File',
1597: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1598: &GDBM_WRCREAT(),0640)) {
1599: $hash{"version:$symb"}++;
1600: my $version=$hash{"version:$symb"};
1601: my $allkeys='';
1602: foreach my $key (keys(%$storehash)) {
1603: $allkeys.=$key.':';
1604: $hash{"$version:$symb:$key"}=$$storehash{$key};
1605: }
1606: $hash{"$version:$symb:timestamp"}=$now;
1607: $allkeys.='timestamp';
1608: $hash{"$version:keys:$symb"}=$allkeys;
1609: if (untie(%hash)) {
1610: return 'ok';
1611: } else {
1612: return "error:$!";
1613: }
1614: } else {
1615: return "error:$!";
1616: }
1617: }
1618:
1619: # -----------------------------------------------------------------Temp Restore
1620:
1621: sub tmprestore {
1622: my ($symb,$namespace,$domain,$stuname) = @_;
1623:
1624: if (!$symb) {
1625: $symb=&symbread();
1626: if (!$symb) { $symb= $ENV{'request.url'}; }
1627: }
1628: $symb=escape($symb);
1629:
1630: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1631: #FIXME needs to do something for /pub resources
1632: if (!$domain) { $domain=$ENV{'user.domain'}; }
1633: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1634:
1635: my %returnhash;
1636: $namespace=~s/\//\_/g;
1637: $namespace=~s/\W//g;
1638: my %hash;
1639: my $path=$perlvar{'lonDaemons'}.'/tmp';
1640: if (tie(%hash,'GDBM_File',
1641: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1642: &GDBM_READER(),0640)) {
1643: my $version=$hash{"version:$symb"};
1644: $returnhash{'version'}=$version;
1645: my $scope;
1646: for ($scope=1;$scope<=$version;$scope++) {
1647: my $vkeys=$hash{"$scope:keys:$symb"};
1648: my @keys=split(/:/,$vkeys);
1649: my $key;
1650: $returnhash{"$scope:keys"}=$vkeys;
1651: foreach $key (@keys) {
1652: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1653: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1654: }
1655: }
1656: if (!(untie(%hash))) {
1657: return "error:$!";
1658: }
1659: } else {
1660: return "error:$!";
1661: }
1662: return %returnhash;
1663: }
1664:
1665: # ----------------------------------------------------------------------- Store
1666:
1667: sub store {
1668: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1669: my $home='';
1670:
1671: if ($stuname) { $home=&homeserver($stuname,$domain); }
1672:
1673: $symb=&symbclean($symb);
1674: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1675:
1676: if (!$domain) { $domain=$ENV{'user.domain'}; }
1677: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1678:
1679: &devalidate($symb,$stuname,$domain);
1680:
1681: $symb=escape($symb);
1682: if (!$namespace) {
1683: unless ($namespace=$ENV{'request.course.id'}) {
1684: return '';
1685: }
1686: }
1687: if (!$home) { $home=$ENV{'user.home'}; }
1688: my $namevalue='';
1689: foreach (keys %$storehash) {
1690: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1691: }
1692: $namevalue=~s/\&$//;
1693: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1694: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1695: }
1696:
1697: # -------------------------------------------------------------- Critical Store
1698:
1699: sub cstore {
1700: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1701: my $home='';
1702:
1703: if ($stuname) { $home=&homeserver($stuname,$domain); }
1704:
1705: $symb=&symbclean($symb);
1706: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1707:
1708: if (!$domain) { $domain=$ENV{'user.domain'}; }
1709: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1710:
1711: &devalidate($symb,$stuname,$domain);
1712:
1713: $symb=escape($symb);
1714: if (!$namespace) {
1715: unless ($namespace=$ENV{'request.course.id'}) {
1716: return '';
1717: }
1718: }
1719: if (!$home) { $home=$ENV{'user.home'}; }
1720:
1721: my $namevalue='';
1722: foreach (keys %$storehash) {
1723: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1724: }
1725: $namevalue=~s/\&$//;
1726: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1727: return critical
1728: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1729: }
1730:
1731: # --------------------------------------------------------------------- Restore
1732:
1733: sub restore {
1734: my ($symb,$namespace,$domain,$stuname) = @_;
1735: my $home='';
1736:
1737: if ($stuname) { $home=&homeserver($stuname,$domain); }
1738:
1739: if (!$symb) {
1740: unless ($symb=escape(&symbread())) { return ''; }
1741: } else {
1742: $symb=&escape(&symbclean($symb));
1743: }
1744: if (!$namespace) {
1745: unless ($namespace=$ENV{'request.course.id'}) {
1746: return '';
1747: }
1748: }
1749: if (!$domain) { $domain=$ENV{'user.domain'}; }
1750: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1751: if (!$home) { $home=$ENV{'user.home'}; }
1752: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1753:
1754: my %returnhash=();
1755: foreach (split(/\&/,$answer)) {
1756: my ($name,$value)=split(/\=/,$_);
1757: $returnhash{&unescape($name)}=&unescape($value);
1758: }
1759: my $version;
1760: for ($version=1;$version<=$returnhash{'version'};$version++) {
1761: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1762: $returnhash{$_}=$returnhash{$version.':'.$_};
1763: }
1764: }
1765: return %returnhash;
1766: }
1767:
1768: # ---------------------------------------------------------- Course Description
1769:
1770: sub coursedescription {
1771: my $courseid=shift;
1772: $courseid=~s/^\///;
1773: $courseid=~s/\_/\//g;
1774: my ($cdomain,$cnum)=split(/\//,$courseid);
1775: my $chome=&homeserver($cnum,$cdomain);
1776: my $normalid=$cdomain.'_'.$cnum;
1777: # need to always cache even if we get errors otherwise we keep
1778: # trying and trying and trying to get the course description.
1779: my %envhash=();
1780: my %returnhash=();
1781: $envhash{'course.'.$normalid.'.last_cache'}=time;
1782: if ($chome ne 'no_host') {
1783: %returnhash=&dump('environment',$cdomain,$cnum);
1784: if (!exists($returnhash{'con_lost'})) {
1785: $returnhash{'home'}= $chome;
1786: $returnhash{'domain'} = $cdomain;
1787: $returnhash{'num'} = $cnum;
1788: while (my ($name,$value) = each %returnhash) {
1789: $envhash{'course.'.$normalid.'.'.$name}=$value;
1790: }
1791: $returnhash{'url'}=&clutter($returnhash{'url'});
1792: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1793: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1794: $envhash{'course.'.$normalid.'.home'}=$chome;
1795: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1796: $envhash{'course.'.$normalid.'.num'}=$cnum;
1797: }
1798: }
1799: &appenv(%envhash);
1800: return %returnhash;
1801: }
1802:
1803: # -------------------------------------------------------- Get user privileges
1804:
1805: sub rolesinit {
1806: my ($domain,$username,$authhost)=@_;
1807: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1808: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1809: my %allroles=();
1810: my %thesepriv=();
1811: my $now=time;
1812: my $userroles="user.login.time=$now\n";
1813: my $thesestr;
1814:
1815: if ($rolesdump ne '') {
1816: foreach (split(/&/,$rolesdump)) {
1817: if ($_!~/^rolesdef\&/) {
1818: my ($area,$role)=split(/=/,$_);
1819: $area=~s/\_\w\w$//;
1820: my ($trole,$tend,$tstart)=split(/_/,$role);
1821: $userroles.='user.role.'.$trole.'.'.$area.'='.
1822: $tstart.'.'.$tend."\n";
1823: # log the associated role with the area
1824: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
1825: if ($tend!=0) {
1826: if ($tend<$now) {
1827: $trole='';
1828: }
1829: }
1830: if ($tstart!=0) {
1831: if ($tstart>$now) {
1832: $trole='';
1833: }
1834: }
1835: if (($area ne '') && ($trole ne '')) {
1836: my $spec=$trole.'.'.$area;
1837: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1838: if ($trole =~ /^cr\//) {
1839: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1840: my $homsvr=homeserver($rauthor,$rdomain);
1841: if ($hostname{$homsvr} ne '') {
1842: my $roledef=
1843: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1844: $homsvr);
1845: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1846: my ($syspriv,$dompriv,$coursepriv)=
1847: split(/\_/,unescape($roledef));
1848: if (defined($syspriv)) {
1849: $allroles{'cm./'}.=':'.$syspriv;
1850: $allroles{$spec.'./'}.=':'.$syspriv;
1851: }
1852: if ($tdomain ne '') {
1853: if (defined($dompriv)) {
1854: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1855: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1856: }
1857: if ($trest ne '') {
1858: if (defined($coursepriv)) {
1859: $allroles{'cm.'.$area}.=':'.$coursepriv;
1860: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1861: }
1862: }
1863: }
1864: }
1865: }
1866: } else {
1867: if (defined($pr{$trole.':s'})) {
1868: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1869: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1870: }
1871: if ($tdomain ne '') {
1872: if (defined($pr{$trole.':d'})) {
1873: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1874: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1875: }
1876: if ($trest ne '') {
1877: if (defined($pr{$trole.':c'})) {
1878: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1879: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1880: }
1881: }
1882: }
1883: }
1884: }
1885: }
1886: }
1887: my $adv=0;
1888: my $author=0;
1889: foreach (keys %allroles) {
1890: %thesepriv=();
1891: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1892: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1893: foreach (split(/:/,$allroles{$_})) {
1894: if ($_ ne '') {
1895: my ($privilege,$restrictions)=split(/&/,$_);
1896: if ($restrictions eq '') {
1897: $thesepriv{$privilege}='F';
1898: } else {
1899: if ($thesepriv{$privilege} ne 'F') {
1900: $thesepriv{$privilege}.=$restrictions;
1901: }
1902: }
1903: }
1904: }
1905: $thesestr='';
1906: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1907: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1908: }
1909: $userroles.='user.adv='.$adv."\n".
1910: 'user.author='.$author."\n";
1911: $ENV{'user.adv'}=$adv;
1912: }
1913: return $userroles;
1914: }
1915:
1916: # --------------------------------------------------------------- get interface
1917:
1918: sub get {
1919: my ($namespace,$storearr,$udomain,$uname)=@_;
1920: my $items='';
1921: foreach (@$storearr) {
1922: $items.=escape($_).'&';
1923: }
1924: $items=~s/\&$//;
1925: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1926: if (!$uname) { $uname=$ENV{'user.name'}; }
1927: my $uhome=&homeserver($uname,$udomain);
1928:
1929: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1930: my @pairs=split(/\&/,$rep);
1931: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
1932: return @pairs;
1933: }
1934: my %returnhash=();
1935: my $i=0;
1936: foreach (@$storearr) {
1937: $returnhash{$_}=unescape($pairs[$i]);
1938: $i++;
1939: }
1940: return %returnhash;
1941: }
1942:
1943: # --------------------------------------------------------------- del interface
1944:
1945: sub del {
1946: my ($namespace,$storearr,$udomain,$uname)=@_;
1947: my $items='';
1948: foreach (@$storearr) {
1949: $items.=escape($_).'&';
1950: }
1951: $items=~s/\&$//;
1952: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1953: if (!$uname) { $uname=$ENV{'user.name'}; }
1954: my $uhome=&homeserver($uname,$udomain);
1955:
1956: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1957: }
1958:
1959: # -------------------------------------------------------------- dump interface
1960:
1961: sub dump {
1962: my ($namespace,$udomain,$uname,$regexp)=@_;
1963: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1964: if (!$uname) { $uname=$ENV{'user.name'}; }
1965: my $uhome=&homeserver($uname,$udomain);
1966: if ($regexp) {
1967: $regexp=&escape($regexp);
1968: } else {
1969: $regexp='.';
1970: }
1971: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1972: my @pairs=split(/\&/,$rep);
1973: my %returnhash=();
1974: foreach (@pairs) {
1975: my ($key,$value)=split(/=/,$_);
1976: $returnhash{unescape($key)}=unescape($value);
1977: }
1978: return %returnhash;
1979: }
1980:
1981: # --------------------------------------------------------------- currentdump
1982: sub currentdump {
1983: my ($courseid,$sdom,$sname)=@_;
1984: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
1985: $sdom = $ENV{'user.domain'} if (! defined($sdom));
1986: $sname = $ENV{'user.name'} if (! defined($sname));
1987: my $uhome = &homeserver($sname,$sdom);
1988: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
1989: return if ($rep =~ /^(error:|no_such_host)/);
1990: #
1991: my %returnhash=();
1992: #
1993: if ($rep eq "unknown_cmd") {
1994: # an old lond will not know currentdump
1995: # Do a dump and make it look like a currentdump
1996: my @tmp = &dump($courseid,$sdom,$sname,'.');
1997: return if ($tmp[0] =~ /^(error:|no_such_host)/);
1998: my %hash = @tmp;
1999: @tmp=();
2000: # Code ripped from lond, essentially. The only difference
2001: # here is the unescaping done by lonnet::dump(). Conceivably
2002: # we might run in to problems with parameter names =~ /^v\./
2003: while (my ($key,$value) = each(%hash)) {
2004: my ($v,$symb,$param) = split(/:/,$key);
2005: next if ($v eq 'version' || $symb eq 'keys');
2006: next if (exists($returnhash{$symb}) &&
2007: exists($returnhash{$symb}->{$param}) &&
2008: $returnhash{$symb}->{'v.'.$param} > $v);
2009: $returnhash{$symb}->{$param}=$value;
2010: $returnhash{$symb}->{'v.'.$param}=$v;
2011: }
2012: #
2013: # Remove all of the keys in the hashes which keep track of
2014: # the version of the parameter.
2015: while (my ($symb,$param_hash) = each(%returnhash)) {
2016: # use a foreach because we are going to delete from the hash.
2017: foreach my $key (keys(%$param_hash)) {
2018: delete($param_hash->{$key}) if ($key =~ /^v\./);
2019: }
2020: }
2021: } else {
2022: my @pairs=split(/\&/,$rep);
2023: foreach (@pairs) {
2024: my ($key,$value)=split(/=/,$_);
2025: my ($symb,$param) = split(/:/,$key);
2026: $returnhash{&unescape($symb)}->{&unescape($param)} =
2027: &unescape($value);
2028: }
2029: }
2030: return %returnhash;
2031: }
2032:
2033: # --------------------------------------------------------------- put interface
2034:
2035: sub put {
2036: my ($namespace,$storehash,$udomain,$uname)=@_;
2037: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2038: if (!$uname) { $uname=$ENV{'user.name'}; }
2039: my $uhome=&homeserver($uname,$udomain);
2040: my $items='';
2041: foreach (keys %$storehash) {
2042: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
2043: }
2044: $items=~s/\&$//;
2045: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2046: }
2047:
2048: # ------------------------------------------------------ critical put interface
2049:
2050: sub cput {
2051: my ($namespace,$storehash,$udomain,$uname)=@_;
2052: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2053: if (!$uname) { $uname=$ENV{'user.name'}; }
2054: my $uhome=&homeserver($uname,$udomain);
2055: my $items='';
2056: foreach (keys %$storehash) {
2057: $items.=escape($_).'='.escape($$storehash{$_}).'&';
2058: }
2059: $items=~s/\&$//;
2060: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2061: }
2062:
2063: # -------------------------------------------------------------- eget interface
2064:
2065: sub eget {
2066: my ($namespace,$storearr,$udomain,$uname)=@_;
2067: my $items='';
2068: foreach (@$storearr) {
2069: $items.=escape($_).'&';
2070: }
2071: $items=~s/\&$//;
2072: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2073: if (!$uname) { $uname=$ENV{'user.name'}; }
2074: my $uhome=&homeserver($uname,$udomain);
2075: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2076: my @pairs=split(/\&/,$rep);
2077: my %returnhash=();
2078: my $i=0;
2079: foreach (@$storearr) {
2080: $returnhash{$_}=unescape($pairs[$i]);
2081: $i++;
2082: }
2083: return %returnhash;
2084: }
2085:
2086: # ---------------------------------------------- Custom access rule evaluation
2087:
2088: sub customaccess {
2089: my ($priv,$uri)=@_;
2090: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2091: $urealm=~s/^\W//;
2092: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2093: my $access=0;
2094: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2095: my ($effect,$realm,$role)=split(/\:/,$_);
2096: if ($role) {
2097: if ($role ne $urole) { next; }
2098: }
2099: foreach (split(/\s*\,\s*/,$realm)) {
2100: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2101: if ($tdom) {
2102: if ($tdom ne $udom) { next; }
2103: }
2104: if ($tcrs) {
2105: if ($tcrs ne $ucrs) { next; }
2106: }
2107: if ($tsec) {
2108: if ($tsec ne $usec) { next; }
2109: }
2110: $access=($effect eq 'allow');
2111: last;
2112: }
2113: }
2114: return $access;
2115: }
2116:
2117: # ------------------------------------------------- Check for a user privilege
2118:
2119: sub allowed {
2120: my ($priv,$uri)=@_;
2121:
2122: my $orguri=$uri;
2123: $uri=&declutter($uri);
2124:
2125: # Free bre access to adm and meta resources
2126:
2127: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2128: return 'F';
2129: }
2130:
2131: # Free bre to public access
2132:
2133: if ($priv eq 'bre') {
2134: my $copyright=&metadata($uri,'copyright');
2135: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2136: return 'F';
2137: }
2138: if ($copyright eq 'priv') {
2139: $uri=~/([^\/]+)\/([^\/]+)\//;
2140: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2141: return '';
2142: }
2143: }
2144: if ($copyright eq 'domain') {
2145: $uri=~/([^\/]+)\/([^\/]+)\//;
2146: unless (($ENV{'user.domain'} eq $1) ||
2147: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2148: return '';
2149: }
2150: }
2151: if ($ENV{'request.role'}=~ /li\.\//) {
2152: # Library role, so allow browsing of resources in this domain.
2153: return 'F';
2154: }
2155: if ($copyright eq 'custom') {
2156: unless (&customaccess($priv,$uri)) { return ''; }
2157: }
2158: }
2159: # Domain coordinator is trying to create a course
2160: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2161: # uri is the requested domain in this case.
2162: # comparison to 'request.role.domain' shows if the user has selected
2163: # a role of dc for the domain in question.
2164: return 'F' if ($uri eq $ENV{'request.role.domain'});
2165: }
2166:
2167: my $thisallowed='';
2168: my $statecond=0;
2169: my $courseprivid='';
2170:
2171: # Course
2172:
2173: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2174: $thisallowed.=$1;
2175: }
2176:
2177: # Domain
2178:
2179: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2180: =~/$priv\&([^\:]*)/) {
2181: $thisallowed.=$1;
2182: }
2183:
2184: # Course: uri itself is a course
2185: my $courseuri=$uri;
2186: $courseuri=~s/\_(\d)/\/$1/;
2187: $courseuri=~s/^([^\/])/\/$1/;
2188:
2189: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2190: =~/$priv\&([^\:]*)/) {
2191: $thisallowed.=$1;
2192: }
2193:
2194: # URI is an uploaded document for this course
2195:
2196: if (($priv eq 'bre') &&
2197: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2198: return 'F';
2199: }
2200: # Full access at system, domain or course-wide level? Exit.
2201:
2202: if ($thisallowed=~/F/) {
2203: return 'F';
2204: }
2205:
2206: # If this is generating or modifying users, exit with special codes
2207:
2208: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
2209: return $thisallowed;
2210: }
2211: #
2212: # Gathered so far: system, domain and course wide privileges
2213: #
2214: # Course: See if uri or referer is an individual resource that is part of
2215: # the course
2216:
2217: if ($ENV{'request.course.id'}) {
2218:
2219: $courseprivid=$ENV{'request.course.id'};
2220: if ($ENV{'request.course.sec'}) {
2221: $courseprivid.='/'.$ENV{'request.course.sec'};
2222: }
2223: $courseprivid=~s/\_/\//;
2224: my $checkreferer=1;
2225: my ($match,$cond)=&is_on_map($uri);
2226: if ($match) {
2227: $statecond=$cond;
2228: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2229: =~/$priv\&([^\:]*)/) {
2230: $thisallowed.=$1;
2231: $checkreferer=0;
2232: }
2233: }
2234:
2235: if ($checkreferer) {
2236: my $refuri=$ENV{'httpref.'.$orguri};
2237: unless ($refuri) {
2238: foreach (keys %ENV) {
2239: if ($_=~/^httpref\..*\*/) {
2240: my $pattern=$_;
2241: $pattern=~s/^httpref\.\/res\///;
2242: $pattern=~s/\*/\[\^\/\]\+/g;
2243: $pattern=~s/\//\\\//g;
2244: if ($orguri=~/$pattern/) {
2245: $refuri=$ENV{$_};
2246: }
2247: }
2248: }
2249: }
2250:
2251: if ($refuri) {
2252: $refuri=&declutter($refuri);
2253: my ($match,$cond)=&is_on_map($refuri);
2254: if ($match) {
2255: my $refstatecond=$cond;
2256: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2257: =~/$priv\&([^\:]*)/) {
2258: $thisallowed.=$1;
2259: $uri=$refuri;
2260: $statecond=$refstatecond;
2261: }
2262: }
2263: }
2264: }
2265: }
2266:
2267: #
2268: # Gathered now: all privileges that could apply, and condition number
2269: #
2270: #
2271: # Full or no access?
2272: #
2273:
2274: if ($thisallowed=~/F/) {
2275: return 'F';
2276: }
2277:
2278: unless ($thisallowed) {
2279: return '';
2280: }
2281:
2282: # Restrictions exist, deal with them
2283: #
2284: # C:according to course preferences
2285: # R:according to resource settings
2286: # L:unless locked
2287: # X:according to user session state
2288: #
2289:
2290: # Possibly locked functionality, check all courses
2291: # Locks might take effect only after 10 minutes cache expiration for other
2292: # courses, and 2 minutes for current course
2293:
2294: my $envkey;
2295: if ($thisallowed=~/L/) {
2296: foreach $envkey (keys %ENV) {
2297: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2298: my $courseid=$2;
2299: my $roleid=$1.'.'.$2;
2300: $courseid=~s/^\///;
2301: my $expiretime=600;
2302: if ($ENV{'request.role'} eq $roleid) {
2303: $expiretime=120;
2304: }
2305: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2306: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2307: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2308: &coursedescription($courseid);
2309: }
2310: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2311: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2312: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2313: &log($ENV{'user.domain'},$ENV{'user.name'},
2314: $ENV{'user.home'},
2315: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2316: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2317: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2318: return '';
2319: }
2320: }
2321: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2322: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2323: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2324: &log($ENV{'user.domain'},$ENV{'user.name'},
2325: $ENV{'user.home'},
2326: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2327: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2328: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2329: return '';
2330: }
2331: }
2332: }
2333: }
2334: }
2335:
2336: #
2337: # Rest of the restrictions depend on selected course
2338: #
2339:
2340: unless ($ENV{'request.course.id'}) {
2341: return '1';
2342: }
2343:
2344: #
2345: # Now user is definitely in a course
2346: #
2347:
2348:
2349: # Course preferences
2350:
2351: if ($thisallowed=~/C/) {
2352: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2353: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2354: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2355: =~/$rolecode/) {
2356: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2357: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2358: $ENV{'request.course.id'});
2359: return '';
2360: }
2361:
2362: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2363: =~/$unamedom/) {
2364: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2365: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2366: $ENV{'request.course.id'});
2367: return '';
2368: }
2369: }
2370:
2371: # Resource preferences
2372:
2373: if ($thisallowed=~/R/) {
2374: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2375: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2376: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2377: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2378: return '';
2379: }
2380: }
2381:
2382: # Restricted by state or randomout?
2383:
2384: if ($thisallowed=~/X/) {
2385: if ($ENV{'acc.randomout'}) {
2386: my $symb=&symbread($uri,1);
2387: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2388: return '';
2389: }
2390: }
2391: if (&condval($statecond)) {
2392: return '2';
2393: } else {
2394: return '';
2395: }
2396: }
2397:
2398: return 'F';
2399: }
2400:
2401: # --------------------------------------------------- Is a resource on the map?
2402:
2403: sub is_on_map {
2404: my $uri=&declutter(shift);
2405: my @uriparts=split(/\//,$uri);
2406: my $filename=$uriparts[$#uriparts];
2407: my $pathname=$uri;
2408: $pathname=~s|/\Q$filename\E$||;
2409: $pathname=~s/^adm\/wrapper\///;
2410: #Trying to find the conditional for the file
2411: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2412: /\&\Q$filename\E\:([\d\|]+)\&/);
2413: if ($match) {
2414: return (1,$1);
2415: } else {
2416: return (0,0);
2417: }
2418: }
2419:
2420: # ----------------------------------------------------------------- Define Role
2421:
2422: sub definerole {
2423: if (allowed('mcr','/')) {
2424: my ($rolename,$sysrole,$domrole,$courole)=@_;
2425: foreach (split('/',$sysrole)) {
2426: my ($crole,$cqual)=split(/\&/,$_);
2427: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2428: if ($pr{'cr:s'}=~/$crole\&/) {
2429: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2430: return "refused:s:$crole&$cqual";
2431: }
2432: }
2433: }
2434: foreach (split('/',$domrole)) {
2435: my ($crole,$cqual)=split(/\&/,$_);
2436: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2437: if ($pr{'cr:d'}=~/$crole\&/) {
2438: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2439: return "refused:d:$crole&$cqual";
2440: }
2441: }
2442: }
2443: foreach (split('/',$courole)) {
2444: my ($crole,$cqual)=split(/\&/,$_);
2445: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2446: if ($pr{'cr:c'}=~/$crole\&/) {
2447: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2448: return "refused:c:$crole&$cqual";
2449: }
2450: }
2451: }
2452: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2453: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2454: "rolesdef_$rolename=".
2455: escape($sysrole.'_'.$domrole.'_'.$courole);
2456: return reply($command,$ENV{'user.home'});
2457: } else {
2458: return 'refused';
2459: }
2460: }
2461:
2462: # ---------------- Make a metadata query against the network of library servers
2463:
2464: sub metadata_query {
2465: my ($query,$custom,$customshow,$server_array)=@_;
2466: my %rhash;
2467: my @server_list = (defined($server_array) ? @$server_array
2468: : keys(%libserv) );
2469: for my $server (@server_list) {
2470: unless ($custom or $customshow) {
2471: my $reply=&reply("querysend:".&escape($query),$server);
2472: $rhash{$server}=$reply;
2473: }
2474: else {
2475: my $reply=&reply("querysend:".&escape($query).':'.
2476: &escape($custom).':'.&escape($customshow),
2477: $server);
2478: $rhash{$server}=$reply;
2479: }
2480: }
2481: return \%rhash;
2482: }
2483:
2484: # ----------------------------------------- Send log queries and wait for reply
2485:
2486: sub log_query {
2487: my ($uname,$udom,$query,%filters)=@_;
2488: my $uhome=&homeserver($uname,$udom);
2489: if ($uhome eq 'no_host') { return 'error: no_host'; }
2490: my $uhost=$hostname{$uhome};
2491: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2492: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2493: $uhome);
2494: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2495: return get_query_reply($queryid);
2496: }
2497:
2498: sub get_query_reply {
2499: my $queryid=shift;
2500: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2501: my $reply='';
2502: for (1..100) {
2503: sleep 2;
2504: if (-e $replyfile.'.end') {
2505: if (my $fh=Apache::File->new($replyfile)) {
2506: $reply.=<$fh>;
2507: $fh->close;
2508: } else { return 'error: reply_file_error'; }
2509: return &unescape($reply);
2510: }
2511: }
2512: return 'timeout:'.$queryid;
2513: }
2514:
2515: sub courselog_query {
2516: #
2517: # possible filters:
2518: # url: url or symb
2519: # username
2520: # domain
2521: # action: view, submit, grade
2522: # start: timestamp
2523: # end: timestamp
2524: #
2525: my (%filters)=@_;
2526: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2527: if ($filters{'url'}) {
2528: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2529: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2530: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2531: }
2532: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2533: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2534: return &log_query($cname,$cdom,'courselog',%filters);
2535: }
2536:
2537: sub userlog_query {
2538: my ($uname,$udom,%filters)=@_;
2539: return &log_query($uname,$udom,'userlog',%filters);
2540: }
2541:
2542: # ------------------------------------------------------------------ Plain Text
2543:
2544: sub plaintext {
2545: my $short=shift;
2546: return $prp{$short};
2547: }
2548:
2549: # ----------------------------------------------------------------- Assign Role
2550:
2551: sub assignrole {
2552: my ($udom,$uname,$url,$role,$end,$start)=@_;
2553: my $mrole;
2554: if ($role =~ /^cr\//) {
2555: unless (&allowed('ccr',$url)) {
2556: &logthis('Refused custom assignrole: '.
2557: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2558: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2559: return 'refused';
2560: }
2561: $mrole='cr';
2562: } else {
2563: my $cwosec=$url;
2564: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2565: unless (&allowed('c'.$role,$cwosec)) {
2566: &logthis('Refused assignrole: '.
2567: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2568: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2569: return 'refused';
2570: }
2571: $mrole=$role;
2572: }
2573: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2574: "$udom:$uname:$url".'_'."$mrole=$role";
2575: if ($end) { $command.='_'.$end; }
2576: if ($start) {
2577: if ($end) {
2578: $command.='_'.$start;
2579: } else {
2580: $command.='_0_'.$start;
2581: }
2582: }
2583: my $answer=&reply($command,&homeserver($uname,$udom));
2584: if ($answer eq 'ok') {
2585: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
2586: }
2587: return $answer;
2588: }
2589:
2590: # -------------------------------------------------- Modify user authentication
2591: # Overrides without validation
2592:
2593: sub modifyuserauth {
2594: my ($udom,$uname,$umode,$upass)=@_;
2595: my $uhome=&homeserver($uname,$udom);
2596: unless (&allowed('mau',$udom)) { return 'refused'; }
2597: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
2598: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2599: ' in domain '.$ENV{'request.role.domain'});
2600: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2601: &escape($upass),$uhome);
2602: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2603: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2604: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2605: &log($udom,,$uname,$uhome,
2606: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2607: $ENV{'user.name'}.', '.$umode.
2608: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2609: unless ($reply eq 'ok') {
2610: &logthis('Authentication mode error: '.$reply);
2611: return 'error: '.$reply;
2612: }
2613: return 'ok';
2614: }
2615:
2616: # --------------------------------------------------------------- Modify a user
2617:
2618: sub modifyuser {
2619: my ($udom, $uname, $uid,
2620: $umode, $upass, $first,
2621: $middle, $last, $gene,
2622: $forceid, $desiredhome)=@_;
2623: $udom=~s/\W//g;
2624: $uname=~s/\W//g;
2625: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
2626: $umode.', '.$first.', '.$middle.', '.
2627: $last.', '.$gene.'(forceid: '.$forceid.')'.
2628: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
2629: ' desiredhome not specified').
2630: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2631: ' in domain '.$ENV{'request.role.domain'});
2632: my $uhome=&homeserver($uname,$udom,'true');
2633: # ----------------------------------------------------------------- Create User
2634: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
2635: my $unhome='';
2636: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
2637: $unhome = $desiredhome;
2638: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
2639: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
2640: } else { # load balancing routine for determining $unhome
2641: my $tryserver;
2642: my $loadm=10000000;
2643: foreach $tryserver (keys %libserv) {
2644: if ($hostdom{$tryserver} eq $udom) {
2645: my $answer=reply('load',$tryserver);
2646: if (($answer=~/\d+/) && ($answer<$loadm)) {
2647: $loadm=$answer;
2648: $unhome=$tryserver;
2649: }
2650: }
2651: }
2652: }
2653: if (($unhome eq '') || ($unhome eq 'no_host')) {
2654: return 'error: unable to find a home server for '.$uname.
2655: ' in domain '.$udom;
2656: }
2657: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
2658: &escape($upass),$unhome);
2659: unless ($reply eq 'ok') {
2660: return 'error: '.$reply;
2661: }
2662: $uhome=&homeserver($uname,$udom,'true');
2663: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
2664: return 'error: verify home';
2665: }
2666: } # End of creation of new user
2667: # ---------------------------------------------------------------------- Add ID
2668: if ($uid) {
2669: $uid=~tr/A-Z/a-z/;
2670: my %uidhash=&idrget($udom,$uname);
2671: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
2672: && (!$forceid)) {
2673: unless ($uid eq $uidhash{$uname}) {
2674: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
2675: }
2676: } else {
2677: &idput($udom,($uname => $uid));
2678: }
2679: }
2680: # -------------------------------------------------------------- Add names, etc
2681: my @tmp=&get('environment',
2682: ['firstname','middlename','lastname','generation'],
2683: $udom,$uname);
2684: my %names;
2685: if ($tmp[0] =~ m/^error:.*/) {
2686: %names=();
2687: } else {
2688: %names = @tmp;
2689: }
2690: if ($first) { $names{'firstname'} = $first; }
2691: if ($middle) { $names{'middlename'} = $middle; }
2692: if ($last) { $names{'lastname'} = $last; }
2693: if ($gene) { $names{'generation'} = $gene; }
2694: my $reply = &put('environment', \%names, $udom,$uname);
2695: if ($reply ne 'ok') { return 'error: '.$reply; }
2696: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
2697: $umode.', '.$first.', '.$middle.', '.
2698: $last.', '.$gene.' by '.
2699: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2700: return 'ok';
2701: }
2702:
2703: # -------------------------------------------------------------- Modify student
2704:
2705: sub modifystudent {
2706: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
2707: $end,$start,$forceid,$desiredhome)=@_;
2708: my $cid='';
2709: unless ($cid=$ENV{'request.course.id'}) {
2710: return 'not_in_class';
2711: }
2712: # --------------------------------------------------------------- Make the user
2713: my $reply=&modifyuser
2714: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
2715: $desiredhome);
2716: unless ($reply eq 'ok') { return $reply; }
2717: # This will cause &modify_student_enrollment to get the uid from the
2718: # students environment
2719: $uid = undef if (!$forceid);
2720: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
2721: $last,$gene,$usec,$end,$start);
2722: return $reply;
2723: }
2724:
2725: sub modify_student_enrollment {
2726: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
2727: # Get the course id from the environment
2728: my $cid='';
2729: unless ($cid=$ENV{'request.course.id'}) {
2730: return 'not_in_class';
2731: }
2732: # Make sure the user exists
2733: my $uhome=&homeserver($uname,$udom);
2734: if (($uhome eq '') || ($uhome eq 'no_host')) {
2735: return 'error: no such user';
2736: }
2737: #
2738: # Get student data if we were not given enough information
2739: if (!defined($first) || $first eq '' ||
2740: !defined($last) || $last eq '' ||
2741: !defined($uid) || $uid eq '' ||
2742: !defined($middle) || $middle eq '' ||
2743: !defined($gene) || $gene eq '') {
2744: # They did not supply us with enough data to enroll the student, so
2745: # we need to pick up more information.
2746: my %tmp = &get('environment',
2747: ['firstname','middlename','lastname', 'generation','id']
2748: ,$udom,$uname);
2749:
2750: foreach (keys(%tmp)) {
2751: &logthis("key $_ = ".$tmp{$_});
2752: }
2753: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
2754: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
2755: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
2756: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
2757: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
2758: }
2759: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
2760: $first,$middle);
2761: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
2762: $ENV{'course.'.$cid.'.num'}.':classlist:'.
2763: &escape($uname.':'.$udom).'='.
2764: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
2765: $ENV{'course.'.$cid.'.home'});
2766: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
2767: return 'error: '.$reply;
2768: }
2769: # Add student role to user
2770: my $uurl='/'.$cid;
2771: $uurl=~s/\_/\//g;
2772: if ($usec) {
2773: $uurl.='/'.$usec;
2774: }
2775: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
2776: }
2777:
2778: # ------------------------------------------------- Write to course preferences
2779:
2780: sub writecoursepref {
2781: my ($courseid,%prefs)=@_;
2782: $courseid=~s/^\///;
2783: $courseid=~s/\_/\//g;
2784: my ($cdomain,$cnum)=split(/\//,$courseid);
2785: my $chome=homeserver($cnum,$cdomain);
2786: if (($chome eq '') || ($chome eq 'no_host')) {
2787: return 'error: no such course';
2788: }
2789: my $cstring='';
2790: foreach (keys %prefs) {
2791: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
2792: }
2793: $cstring=~s/\&$//;
2794: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
2795: }
2796:
2797: # ---------------------------------------------------------- Make/modify course
2798:
2799: sub createcourse {
2800: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
2801: $url=&declutter($url);
2802: my $cid='';
2803: unless (&allowed('ccc',$udom)) {
2804: return 'refused';
2805: }
2806: # ------------------------------------------------------------------- Create ID
2807: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2808: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2809: # ----------------------------------------------- Make sure that does not exist
2810: my $uhome=&homeserver($uname,$udom,'true');
2811: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2812: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
2813: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
2814: $uhome=&homeserver($uname,$udom,'true');
2815: unless (($uhome eq '') || ($uhome eq 'no_host')) {
2816: return 'error: unable to generate unique course-ID';
2817: }
2818: }
2819: # ------------------------------------------------ Check supplied server name
2820: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
2821: if (! exists($libserv{$course_server})) {
2822: return 'error:bad server name '.$course_server;
2823: }
2824: # ------------------------------------------------------------- Make the course
2825: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
2826: $course_server);
2827: unless ($reply eq 'ok') { return 'error: '.$reply; }
2828: $uhome=&homeserver($uname,$udom,'true');
2829: if (($uhome eq '') || ($uhome eq 'no_host')) {
2830: return 'error: no such course';
2831: }
2832: # ----------------------------------------------------------------- Course made
2833: my $topurl=$url;
2834: unless ($nonstandard) {
2835: # ------------------------------------------ For standard courses, make top url
2836: my $mapurl=&clutter($url);
2837: if ($mapurl eq '/res/') { $mapurl=''; }
2838: $ENV{'form.initmap'}=(<<ENDINITMAP);
2839: <map>
2840: <resource id="1" type="start"></resource>
2841: <resource id="2" src="$mapurl"></resource>
2842: <resource id="3" type="finish"></resource>
2843: <link index="1" from="1" to="2"></link>
2844: <link index="2" from="2" to="3"></link>
2845: </map>
2846: ENDINITMAP
2847: $topurl=&declutter(
2848: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
2849: );
2850: }
2851: # ----------------------------------------------------------- Write preferences
2852: &writecoursepref($udom.'_'.$uname,
2853: ('description' => $description,
2854: 'url' => $topurl));
2855: return '/'.$udom.'/'.$uname;
2856: }
2857:
2858: # ---------------------------------------------------------- Assign Custom Role
2859:
2860: sub assigncustomrole {
2861: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
2862: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
2863: $end,$start);
2864: }
2865:
2866: # ----------------------------------------------------------------- Revoke Role
2867:
2868: sub revokerole {
2869: my ($udom,$uname,$url,$role)=@_;
2870: my $now=time;
2871: return &assignrole($udom,$uname,$url,$role,$now);
2872: }
2873:
2874: # ---------------------------------------------------------- Revoke Custom Role
2875:
2876: sub revokecustomrole {
2877: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2878: my $now=time;
2879: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2880: }
2881:
2882: # ------------------------------------------------------------ Directory lister
2883:
2884: sub dirlist {
2885: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
2886:
2887: $uri=~s/^\///;
2888: $uri=~s/\/$//;
2889: my ($udom, $uname);
2890: (undef,$udom,$uname)=split(/\//,$uri);
2891: if(defined($userdomain)) {
2892: $udom = $userdomain;
2893: }
2894: if(defined($username)) {
2895: $uname = $username;
2896: }
2897:
2898: my $dirRoot = $perlvar{'lonDocRoot'};
2899: if(defined($alternateDirectoryRoot)) {
2900: $dirRoot = $alternateDirectoryRoot;
2901: $dirRoot =~ s/\/$//;
2902: }
2903:
2904: if($udom) {
2905: if($uname) {
2906: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
2907: homeserver($uname,$udom));
2908: return split(/:/,$listing);
2909: } elsif(!defined($alternateDirectoryRoot)) {
2910: my $tryserver;
2911: my %allusers=();
2912: foreach $tryserver (keys %libserv) {
2913: if($hostdom{$tryserver} eq $udom) {
2914: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
2915: $udom, $tryserver);
2916: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2917: && ($listing ne 'con_lost')) {
2918: foreach (split(/:/,$listing)) {
2919: my ($entry,@stat)=split(/&/,$_);
2920: $allusers{$entry}=1;
2921: }
2922: }
2923: }
2924: }
2925: my $alluserstr='';
2926: foreach (sort keys %allusers) {
2927: $alluserstr.=$_.'&user:';
2928: }
2929: $alluserstr=~s/:$//;
2930: return split(/:/,$alluserstr);
2931: } else {
2932: my @emptyResults = ();
2933: push(@emptyResults, 'missing user name');
2934: return split(':',@emptyResults);
2935: }
2936: } elsif(!defined($alternateDirectoryRoot)) {
2937: my $tryserver;
2938: my %alldom=();
2939: foreach $tryserver (keys %libserv) {
2940: $alldom{$hostdom{$tryserver}}=1;
2941: }
2942: my $alldomstr='';
2943: foreach (sort keys %alldom) {
2944: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2945: }
2946: $alldomstr=~s/:$//;
2947: return split(/:/,$alldomstr);
2948: } else {
2949: my @emptyResults = ();
2950: push(@emptyResults, 'missing domain');
2951: return split(':',@emptyResults);
2952: }
2953: }
2954:
2955: # --------------------------------------------- GetFileTimestamp
2956: # This function utilizes dirlist and returns the date stamp for
2957: # when it was last modified. It will also return an error of -1
2958: # if an error occurs
2959:
2960: sub GetFileTimestamp {
2961: my ($studentDomain,$studentName,$filename,$root)=@_;
2962: $studentDomain=~s/\W//g;
2963: $studentName=~s/\W//g;
2964: my $subdir=$studentName.'__';
2965: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
2966: my $proname="$studentDomain/$subdir/$studentName";
2967: $proname .= '/'.$filename;
2968: my @dir = &Apache::lonnet::dirlist($proname, $studentDomain, $studentName,
2969: $root);
2970: my $fileStat = $dir[0];
2971: my @stats = split('&', $fileStat);
2972: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
2973: return $stats[9];
2974: } else {
2975: return -1;
2976: }
2977: }
2978:
2979: # -------------------------------------------------------- Value of a Condition
2980:
2981: sub directcondval {
2982: my $number=shift;
2983: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2984: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2985: } else {
2986: return 2;
2987: }
2988: }
2989:
2990: sub condval {
2991: my $condidx=shift;
2992: my $result=0;
2993: my $allpathcond='';
2994: foreach (split(/\|/,$condidx)) {
2995: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2996: $allpathcond.=
2997: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2998: }
2999: }
3000: $allpathcond=~s/\|$//;
3001: if ($ENV{'request.course.id'}) {
3002: if ($allpathcond) {
3003: my $operand='|';
3004: my @stack;
3005: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3006: if ($_ eq '(') {
3007: push @stack,($operand,$result)
3008: } elsif ($_ eq ')') {
3009: my $before=pop @stack;
3010: if (pop @stack eq '&') {
3011: $result=$result>$before?$before:$result;
3012: } else {
3013: $result=$result>$before?$result:$before;
3014: }
3015: } elsif (($_ eq '&') || ($_ eq '|')) {
3016: $operand=$_;
3017: } else {
3018: my $new=directcondval($_);
3019: if ($operand eq '&') {
3020: $result=$result>$new?$new:$result;
3021: } else {
3022: $result=$result>$new?$result:$new;
3023: }
3024: }
3025: }
3026: }
3027: }
3028: return $result;
3029: }
3030:
3031: # ---------------------------------------------------- Devalidate courseresdata
3032:
3033: sub devalidatecourseresdata {
3034: my ($coursenum,$coursedomain)=@_;
3035: my $hashid=$coursenum.':'.$coursedomain;
3036: delete $courseresdatacache{$hashid.'.time'};
3037: }
3038:
3039: # --------------------------------------------------- Course Resourcedata Query
3040:
3041: sub courseresdata {
3042: my ($coursenum,$coursedomain,@which)=@_;
3043: my $coursehom=&homeserver($coursenum,$coursedomain);
3044: my $hashid=$coursenum.':'.$coursedomain;
3045: my $dodump=0;
3046: if (!defined($courseresdatacache{$hashid.'.time'})) {
3047: $dodump=1;
3048: } else {
3049: if (time-$courseresdatacache{$hashid.'.time'}>300) { $dodump=1; }
3050: }
3051: if ($dodump) {
3052: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3053: my ($tmp) = keys(%dumpreply);
3054: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3055: $courseresdatacache{$hashid.'.time'}=time;
3056: $courseresdatacache{$hashid}=\%dumpreply;
3057: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3058: return $tmp;
3059: }
3060: }
3061: foreach my $item (@which) {
3062: if (defined($courseresdatacache{$hashid}->{$item})) {
3063: return $courseresdatacache{$hashid}->{$item};
3064: }
3065: }
3066: return undef;
3067: }
3068:
3069: # --------------------------------------------------------- Value of a Variable
3070:
3071: sub EXT {
3072: my ($varname,$symbparm,$udom,$uname,)=@_;
3073:
3074: unless ($varname) { return ''; }
3075: #get real user name/domain, courseid and symb
3076: my $courseid;
3077: if (!($uname && $udom)) {
3078: (my $cursymb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
3079: if (!$symbparm) { $symbparm=$cursymb; }
3080: } else {
3081: $courseid=$ENV{'request.course.id'};
3082: }
3083: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3084: my $rest;
3085: if (defined($therest[0])) {
3086: $rest=join('.',@therest);
3087: } else {
3088: $rest='';
3089: }
3090:
3091: my $qualifierrest=$qualifier;
3092: if ($rest) { $qualifierrest.='.'.$rest; }
3093: my $spacequalifierrest=$space;
3094: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
3095: if ($realm eq 'user') {
3096: # --------------------------------------------------------------- user.resource
3097: if ($space eq 'resource') {
3098: if (defined($Apache::lonhomework::parsing_a_problem)) {
3099: return $Apache::lonhomework::history{$qualifierrest};
3100: } else {
3101: my %restored=&restore($symbparm,$courseid,$udom,$uname);
3102: return $restored{$qualifierrest};
3103: }
3104: # ----------------------------------------------------------------- user.access
3105: } elsif ($space eq 'access') {
3106: # FIXME - not supporting calls for a specific user
3107: return &allowed($qualifier,$rest);
3108: # ------------------------------------------ user.preferences, user.environment
3109: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
3110: if (($uname eq $ENV{'user.name'}) &&
3111: ($udom eq $ENV{'user.domain'})) {
3112: return $ENV{join('.',('environment',$qualifierrest))};
3113: } else {
3114: my %returnhash=&userenvironment($udom,$uname,$qualifierrest);
3115: return $returnhash{$qualifierrest};
3116: }
3117: # ----------------------------------------------------------------- user.course
3118: } elsif ($space eq 'course') {
3119: # FIXME - not supporting calls for a specific user
3120: return $ENV{join('.',('request.course',$qualifier))};
3121: # ------------------------------------------------------------------- user.role
3122: } elsif ($space eq 'role') {
3123: # FIXME - not supporting calls for a specific user
3124: my ($role,$where)=split(/\./,$ENV{'request.role'});
3125: if ($qualifier eq 'value') {
3126: return $role;
3127: } elsif ($qualifier eq 'extent') {
3128: return $where;
3129: }
3130: # ----------------------------------------------------------------- user.domain
3131: } elsif ($space eq 'domain') {
3132: return $udom;
3133: # ------------------------------------------------------------------- user.name
3134: } elsif ($space eq 'name') {
3135: return $uname;
3136: # ---------------------------------------------------- Any other user namespace
3137: } else {
3138: my %reply=&get($space,[$qualifierrest],$udom,$uname);
3139: return $reply{$qualifierrest};
3140: }
3141: } elsif ($realm eq 'query') {
3142: # ---------------------------------------------- pull stuff out of query string
3143: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},[$space]);
3144: return $ENV{'form.'.$space};
3145: } elsif ($realm eq 'request') {
3146: # ------------------------------------------------------------- request.browser
3147: if ($space eq 'browser') {
3148: return $ENV{'browser.'.$qualifier};
3149: # ------------------------------------------------------------ request.filename
3150: } else {
3151: return $ENV{'request.'.$spacequalifierrest};
3152: }
3153: } elsif ($realm eq 'course') {
3154: # ---------------------------------------------------------- course.description
3155: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3156: } elsif ($realm eq 'resource') {
3157:
3158: if ($courseid eq $ENV{'request.course.id'}) {
3159:
3160: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3161:
3162: # ----------------------------------------------------- Cascading lookup scheme
3163: if (!$symbparm) { $symbparm=&symbread(); }
3164: my $symbp=$symbparm;
3165: my $mapp=(split(/\_\_\_/,$symbp))[0];
3166:
3167: my $symbparm=$symbp.'.'.$spacequalifierrest;
3168: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3169:
3170: my $section;
3171: if (($ENV{'user.name'} eq $uname) &&
3172: ($ENV{'user.domain'} eq $udom)) {
3173: $section=$ENV{'request.course.sec'};
3174: } else {
3175: $section=&usection($udom,$uname,$courseid);
3176: }
3177:
3178: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3179: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3180: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3181:
3182: my $courselevel=$courseid.'.'.$spacequalifierrest;
3183: my $courselevelr=$courseid.'.'.$symbparm;
3184: my $courselevelm=$courseid.'.'.$mapparm;
3185:
3186: # ----------------------------------------------------------- first, check user
3187: #most student don't have any data set, check if there is some data
3188: #every thirty minutes
3189: if (!
3190: (exists($ENV{'cache.studentresdata'})
3191: && (($ENV{'cache.studentresdata'}+1800) > time))) {
3192: my %resourcedata=&get('resourcedata',
3193: [$courselevelr,$courselevelm,$courselevel],
3194: $udom,$uname);
3195: my ($tmp)=keys(%resourcedata);
3196: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3197: if ($resourcedata{$courselevelr}) {
3198: return $resourcedata{$courselevelr}; }
3199: if ($resourcedata{$courselevelm}) {
3200: return $resourcedata{$courselevelm}; }
3201: if ($resourcedata{$courselevel}) {
3202: return $resourcedata{$courselevel}; }
3203: } else {
3204: if ($tmp!~/No such file/) {
3205: &logthis("<font color=blue>WARNING:".
3206: " Trying to get resource data for ".
3207: $uname." at ".$udom.": ".
3208: $tmp."</font>");
3209: } elsif ($tmp=~/error:No such file/) {
3210: $ENV{'cache.studentresdata'}=time;
3211: &appenv(('cache.studentresdata'=>
3212: $ENV{'cache.studentresdata'}));
3213: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3214: return $tmp;
3215: }
3216: }
3217: }
3218:
3219: # -------------------------------------------------------- second, check course
3220:
3221: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3222: $ENV{'course.'.$courseid.'.domain'},
3223: ($seclevelr,$seclevelm,$seclevel,
3224: $courselevelr,$courselevelm,
3225: $courselevel));
3226: if (defined($coursereply)) { return $coursereply; }
3227:
3228: # ------------------------------------------------------ third, check map parms
3229: my %parmhash=();
3230: my $thisparm='';
3231: if (tie(%parmhash,'GDBM_File',
3232: $ENV{'request.course.fn'}.'_parms.db',
3233: &GDBM_READER(),0640)) {
3234: $thisparm=$parmhash{$symbparm};
3235: untie(%parmhash);
3236: }
3237: if ($thisparm) { return $thisparm; }
3238: }
3239: # --------------------------------------------- last, look in resource metadata
3240:
3241: $spacequalifierrest=~s/\./\_/;
3242: my $filename;
3243: if (!$symbparm) { $symbparm=&symbread(); }
3244: if ($symbparm) {
3245: $filename=(split(/\_\_\_/,$symbparm))[2];
3246: } else {
3247: $filename=$ENV{'request.filename'};
3248: }
3249: my $metadata=&metadata($filename,$spacequalifierrest);
3250: if (defined($metadata)) { return $metadata; }
3251: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3252: if (defined($metadata)) { return $metadata; }
3253:
3254: # ------------------------------------------------------------------ Cascade up
3255: unless ($space eq '0') {
3256: my @parts=split(/_/,$space);
3257: my $id=pop(@parts);
3258: my $part=join('_',@parts);
3259: if ($part eq '') { $part='0'; }
3260: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3261: $symbparm,$udom,$uname);
3262: if (defined($partgeneral)) { return $partgeneral; }
3263: }
3264:
3265: # ---------------------------------------------------- Any other user namespace
3266: } elsif ($realm eq 'environment') {
3267: # ----------------------------------------------------------------- environment
3268: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3269: return $ENV{'environment.'.$spacequalifierrest};
3270: } else {
3271: my %returnhash=&userenvironment($udom,$uname,
3272: $spacequalifierrest);
3273: return $returnhash{$spacequalifierrest};
3274: }
3275: } elsif ($realm eq 'system') {
3276: # ----------------------------------------------------------------- system.time
3277: if ($space eq 'time') {
3278: return time;
3279: }
3280: }
3281: return '';
3282: }
3283:
3284: sub add_prefix_and_part {
3285: my ($prefix,$part)=@_;
3286: my $keyroot;
3287: if (defined($prefix) && $prefix !~ /^__/) {
3288: # prefix that has a part already
3289: $keyroot=$prefix;
3290: } elsif (defined($prefix)) {
3291: # prefix that is missing a part
3292: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3293: } else {
3294: # no prefix at all
3295: if (defined($part)) { $keyroot='_'.$part; }
3296: }
3297: return $keyroot;
3298: }
3299:
3300: # ---------------------------------------------------------------- Get metadata
3301:
3302: sub metadata {
3303: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3304:
3305: $uri=&declutter($uri);
3306: # if it is a non metadata possible uri return quickly
3307: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3308: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|)) {
3309: return '';
3310: }
3311: my $filename=$uri;
3312: $uri=~s/\.meta$//;
3313: #
3314: # Is the metadata already cached?
3315: # Look at timestamp of caching
3316: # Everything is cached by the main uri, libraries are never directly cached
3317: #
3318: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600 && !defined($liburi)) {
3319: #
3320: # Is this a recursive call for a library?
3321: #
3322: if ($liburi) {
3323: $liburi=&declutter($liburi);
3324: $filename=$liburi;
3325: }
3326: my %metathesekeys=();
3327: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3328: my $metastring=&getfile(&filelocation('',&clutter($filename)));
3329: my $parser=HTML::LCParser->new(\$metastring);
3330: my $token;
3331: undef %metathesekeys;
3332: while ($token=$parser->get_token) {
3333: if ($token->[0] eq 'S') {
3334: if (defined($token->[2]->{'package'})) {
3335: #
3336: # This is a package - get package info
3337: #
3338: my $package=$token->[2]->{'package'};
3339: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3340: if (defined($token->[2]->{'id'})) {
3341: $keyroot.='_'.$token->[2]->{'id'};
3342: }
3343: if ($metacache{$uri.':packages'}) {
3344: $metacache{$uri.':packages'}.=','.$package.$keyroot;
3345: } else {
3346: $metacache{$uri.':packages'}=$package.$keyroot;
3347: }
3348: foreach (keys %packagetab) {
3349: if ($_=~/^$package\&/) {
3350: my ($pack,$name,$subp)=split(/\&/,$_);
3351: my $value=$packagetab{$_};
3352: my $part=$keyroot;
3353: $part=~s/^\_//;
3354: if ($subp eq 'display') {
3355: $value.=' [Part: '.$part.']';
3356: }
3357: my $unikey='parameter'.$keyroot.'_'.$name;
3358: if ($subp eq 'default') { $unikey='parameter_0_'.$name; }
3359: $metathesekeys{$unikey}=1;
3360: $metacache{$uri.':'.$unikey.'.part'}=$part;
3361: unless (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
3362: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
3363: }
3364: if (defined($metacache{$uri.':'.$unikey.'.default'})) {
3365: $metacache{$uri.':'.$unikey}=
3366: $metacache{$uri.':'.$unikey.'.default'}
3367: }
3368: }
3369: }
3370: } else {
3371: #
3372: # This is not a package - some other kind of start tag
3373: #
3374: my $entry=$token->[1];
3375: my $unikey;
3376: if ($entry eq 'import') {
3377: $unikey='';
3378: } else {
3379: $unikey=$entry;
3380: }
3381: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3382:
3383: if (defined($token->[2]->{'id'})) {
3384: $unikey.='_'.$token->[2]->{'id'};
3385: }
3386:
3387: if ($entry eq 'import') {
3388: #
3389: # Importing a library here
3390: #
3391: if ($depthcount<20) {
3392: my $location=$parser->get_text('/import');
3393: my $dir=$filename;
3394: $dir=~s|[^/]*$||;
3395: $location=&filelocation($dir,$location);
3396: foreach (sort(split(/\,/,&metadata($uri,'keys',
3397: $location,$unikey,
3398: $depthcount+1)))) {
3399: $metathesekeys{$_}=1;
3400: }
3401: }
3402: } else {
3403:
3404: if (defined($token->[2]->{'name'})) {
3405: $unikey.='_'.$token->[2]->{'name'};
3406: }
3407: $metathesekeys{$unikey}=1;
3408: foreach (@{$token->[3]}) {
3409: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
3410: }
3411: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3412: my $default=$metacache{$uri.':'.$unikey.'.default'};
3413: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3414: # only ws inside the tag, and not in default, so use default
3415: # as value
3416: $metacache{$uri.':'.$unikey}=$default;
3417: } else {
3418: # either something interesting inside the tag or default
3419: # uninteresting
3420: $metacache{$uri.':'.$unikey}=$internaltext;
3421: }
3422: # end of not-a-package not-a-library import
3423: }
3424: # end of not-a-package start tag
3425: }
3426: # the next is the end of "start tag"
3427: }
3428: }
3429: # are there custom rights to evaluate
3430: if ($metacache{$uri.':copyright'} eq 'custom') {
3431:
3432: #
3433: # Importing a rights file here
3434: #
3435: unless ($depthcount) {
3436: my $location=$metacache{$uri.':customdistributionfile'};
3437: my $dir=$filename;
3438: $dir=~s|[^/]*$||;
3439: $location=&filelocation($dir,$location);
3440: foreach (sort(split(/\,/,&metadata($uri,'keys',
3441: $location,'_rights',
3442: $depthcount+1)))) {
3443: $metathesekeys{$_}=1;
3444: }
3445: }
3446: }
3447: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
3448: &metadata_generate_part0(\%metathesekeys,\%metacache,$uri);
3449: $metacache{$uri.':allpossiblekeys'}=join(',',keys %metathesekeys);
3450: $metacache{$uri.':cachedtimestamp'}=time;
3451: # this is the end of "was not already recently cached
3452: }
3453: return $metacache{$uri.':'.$what};
3454: }
3455:
3456: sub metadata_generate_part0 {
3457: my ($metadata,$metacache,$uri) = @_;
3458: my %allnames;
3459: foreach my $metakey (sort keys %$metadata) {
3460: if ($metakey=~/^parameter\_(.*)/) {
3461: my $part=$$metacache{$uri.':'.$metakey.'.part'};
3462: my $name=$$metacache{$uri.':'.$metakey.'.name'};
3463: if (! exists($$metadata{'parameter_0_'.$name})) {
3464: $allnames{$name}=$part;
3465: }
3466: }
3467: }
3468: foreach my $name (keys(%allnames)) {
3469: $$metadata{"parameter_0_$name"}=1;
3470: my $key="$uri:parameter_0_$name";
3471: $$metacache{"$key.part"}='0';
3472: $$metacache{"$key.name"}=$name;
3473: $$metacache{"$key.type"}=$$metacache{$uri.':parameter_'.
3474: $allnames{$name}.'_'.$name.
3475: '.type'};
3476: my $olddis=$$metacache{$uri.':parameter_'.$allnames{$name}.'_'.$name.
3477: '.display'};
3478: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3479: $olddis=~s/$expr/\[Part: 0\]/;
3480: $$metacache{"$key.display"}=$olddis;
3481: }
3482: }
3483:
3484: # ------------------------------------------------- Get the title of a resource
3485:
3486: sub gettitle {
3487: my $urlsymb=shift;
3488: my $symb=&symbread($urlsymb);
3489: unless ($symb) {
3490: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3491: return &metadata($urlsymb,'title');
3492: }
3493: if ($titlecache{$symb}) { return $titlecache{$symb}; }
3494: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3495: my $title='';
3496: my %bighash;
3497: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3498: &GDBM_READER(),0640)) {
3499: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3500: $title=$bighash{'title_'.$mapid.'.'.$resid};
3501: untie %bighash;
3502: }
3503: if ($title) {
3504: $titlecache{$symb}=$title;
3505: return $title;
3506: } else {
3507: return &metadata($urlsymb,'title');
3508: }
3509: }
3510:
3511: # ------------------------------------------------- Update symbolic store links
3512:
3513: sub symblist {
3514: my ($mapname,%newhash)=@_;
3515: $mapname=declutter($mapname);
3516: my %hash;
3517: if (($ENV{'request.course.fn'}) && (%newhash)) {
3518: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3519: &GDBM_WRCREAT(),0640)) {
3520: foreach (keys %newhash) {
3521: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
3522: }
3523: if (untie(%hash)) {
3524: return 'ok';
3525: }
3526: }
3527: }
3528: return 'error';
3529: }
3530:
3531: # --------------------------------------------------------------- Verify a symb
3532:
3533: sub symbverify {
3534: my ($symb,$thisfn)=@_;
3535: $thisfn=&declutter($thisfn);
3536: # direct jump to resource in page or to a sequence - will construct own symbs
3537: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
3538: # check URL part
3539: my ($map,$resid,$url)=split(/\_\_\_/,$symb);
3540: unless (&symbclean($url) eq &symbclean($thisfn)) { return 0; }
3541:
3542: $symb=&symbclean($symb);
3543:
3544: my %bighash;
3545: my $okay=0;
3546: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3547: &GDBM_READER(),0640)) {
3548: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3549: unless ($ids) {
3550: $ids=$bighash{'ids_/'.$thisfn};
3551: }
3552: if ($ids) {
3553: # ------------------------------------------------------------------- Has ID(s)
3554: foreach (split(/\,/,$ids)) {
3555: my ($mapid,$resid)=split(/\./,$_);
3556: if (
3557: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
3558: eq $symb) {
3559: $okay=1;
3560: }
3561: }
3562: }
3563: untie(%bighash);
3564: }
3565: return $okay;
3566: }
3567:
3568: # --------------------------------------------------------------- Clean-up symb
3569:
3570: sub symbclean {
3571: my $symb=shift;
3572:
3573: # remove version from map
3574: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
3575:
3576: # remove version from URL
3577: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
3578:
3579: return $symb;
3580: }
3581:
3582: # ------------------------------------------------------ Return symb list entry
3583:
3584: sub symbread {
3585: my ($thisfn,$donotrecurse)=@_;
3586: # no filename provided? try from environment
3587: unless ($thisfn) {
3588: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
3589: $thisfn=$ENV{'request.filename'};
3590: }
3591: # is that filename actually a symb? Verify, clean, and return
3592: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
3593: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
3594: }
3595: $thisfn=declutter($thisfn);
3596: my %hash;
3597: my %bighash;
3598: my $syval='';
3599: if (($ENV{'request.course.fn'}) && ($thisfn)) {
3600: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
3601: &GDBM_READER(),0640)) {
3602: $syval=$hash{$thisfn};
3603: untie(%hash);
3604: }
3605: # ---------------------------------------------------------- There was an entry
3606: if ($syval) {
3607: unless ($syval=~/\_\d+$/) {
3608: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
3609: &appenv('request.ambiguous' => $thisfn);
3610: return '';
3611: }
3612: $syval.=$1;
3613: }
3614: } else {
3615: # ------------------------------------------------------- Was not in symb table
3616: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3617: &GDBM_READER(),0640)) {
3618: # ---------------------------------------------- Get ID(s) for current resource
3619: my $ids=$bighash{'ids_'.&clutter($thisfn)};
3620: unless ($ids) {
3621: $ids=$bighash{'ids_/'.$thisfn};
3622: }
3623: unless ($ids) {
3624: # alias?
3625: $ids=$bighash{'mapalias_'.$thisfn};
3626: }
3627: if ($ids) {
3628: # ------------------------------------------------------------------- Has ID(s)
3629: my @possibilities=split(/\,/,$ids);
3630: if ($#possibilities==0) {
3631: # ----------------------------------------------- There is only one possibility
3632: my ($mapid,$resid)=split(/\./,$ids);
3633: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
3634: } elsif (!$donotrecurse) {
3635: # ------------------------------------------ There is more than one possibility
3636: my $realpossible=0;
3637: foreach (@possibilities) {
3638: my $file=$bighash{'src_'.$_};
3639: if (&allowed('bre',$file)) {
3640: my ($mapid,$resid)=split(/\./,$_);
3641: if ($bighash{'map_type_'.$mapid} ne 'page') {
3642: $realpossible++;
3643: $syval=declutter($bighash{'map_id_'.$mapid}).
3644: '___'.$resid;
3645: }
3646: }
3647: }
3648: if ($realpossible!=1) { $syval=''; }
3649: } else {
3650: $syval='';
3651: }
3652: }
3653: untie(%bighash)
3654: }
3655: }
3656: if ($syval) {
3657: return &symbclean($syval.'___'.$thisfn);
3658: }
3659: }
3660: &appenv('request.ambiguous' => $thisfn);
3661: return '';
3662: }
3663:
3664: # ---------------------------------------------------------- Return random seed
3665:
3666: sub numval {
3667: my $txt=shift;
3668: $txt=~tr/A-J/0-9/;
3669: $txt=~tr/a-j/0-9/;
3670: $txt=~tr/K-T/0-9/;
3671: $txt=~tr/k-t/0-9/;
3672: $txt=~tr/U-Z/0-5/;
3673: $txt=~tr/u-z/0-5/;
3674: $txt=~s/\D//g;
3675: return int($txt);
3676: }
3677:
3678: sub rndseed {
3679: my ($symb,$courseid,$domain,$username)=@_;
3680: if (!$symb) {
3681: unless ($symb=&symbread()) { return time; }
3682: }
3683: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
3684: if (!$domain) {$domain=$ENV{'user.domain'};}
3685: if (!$username) {$username=$ENV{'user.name'};}
3686: {
3687: use integer;
3688: my $symbchck=unpack("%32C*",$symb) << 27;
3689: my $symbseed=numval($symb) << 22;
3690: my $namechck=unpack("%32C*",$username) << 17;
3691: my $nameseed=numval($username) << 12;
3692: my $domainseed=unpack("%32C*",$domain) << 7;
3693: my $courseseed=unpack("%32C*",$courseid);
3694: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
3695: #uncommenting these lines can break things!
3696: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
3697: #&Apache::lonxml::debug("rndseed :$num:$symb");
3698: return $num;
3699: }
3700: }
3701:
3702: sub ireceipt {
3703: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
3704: my $cuname=unpack("%32C*",$funame);
3705: my $cudom=unpack("%32C*",$fudom);
3706: my $cucourseid=unpack("%32C*",$fucourseid);
3707: my $cusymb=unpack("%32C*",$fusymb);
3708: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
3709: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
3710: ($cunique%$cuname+
3711: $cunique%$cudom+
3712: $cusymb%$cuname+
3713: $cusymb%$cudom+
3714: $cucourseid%$cuname+
3715: $cucourseid%$cudom);
3716: }
3717:
3718: sub receipt {
3719: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
3720: return &ireceipt($name,$domain,$courseid,$symb);
3721: }
3722:
3723: # ------------------------------------------------------------ Serves up a file
3724: # returns either the contents of the file or a -1
3725: sub getfile {
3726: my $file=shift;
3727: if ($file=~/^\/*uploaded\//) { # user file
3728: my $ua=new LWP::UserAgent;
3729: my $request=new HTTP::Request('GET',&tokenwrapper($file));
3730: my $response=$ua->request($request);
3731: if ($response->is_success()) {
3732: return $response->content;
3733: } else {
3734: return -1;
3735: }
3736: } else { # normal file from res space
3737: &repcopy($file);
3738: if (! -e $file ) { return -1; };
3739: my $fh=Apache::File->new($file);
3740: my $a='';
3741: while (<$fh>) { $a .=$_; }
3742: return $a;
3743: }
3744: }
3745:
3746: sub filelocation {
3747: my ($dir,$file) = @_;
3748: my $location;
3749: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
3750: if ($file=~m:^/~:) { # is a contruction space reference
3751: $location = $file;
3752: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
3753: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
3754: $location=$file;
3755: } else {
3756: $file=~s/^$perlvar{'lonDocRoot'}//;
3757: $file=~s:^/*res::;
3758: if ( !( $file =~ m:^/:) ) {
3759: $location = $dir. '/'.$file;
3760: } else {
3761: $location = '/home/httpd/html/res'.$file;
3762: }
3763: }
3764: $location=~s://+:/:g; # remove duplicate /
3765: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
3766: return $location;
3767: }
3768:
3769: sub hreflocation {
3770: my ($dir,$file)=@_;
3771: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
3772: my $finalpath=filelocation($dir,$file);
3773: $finalpath=~s/^\/home\/httpd\/html//;
3774: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
3775: return $finalpath;
3776: } else {
3777: return $file;
3778: }
3779: }
3780:
3781: # ------------------------------------------------------------- Declutters URLs
3782:
3783: sub declutter {
3784: my $thisfn=shift;
3785: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
3786: $thisfn=~s/^\///;
3787: $thisfn=~s/^res\///;
3788: $thisfn=~s/\?.+$//;
3789: return $thisfn;
3790: }
3791:
3792: # ------------------------------------------------------------- Clutter up URLs
3793:
3794: sub clutter {
3795: my $thisfn='/'.&declutter(shift);
3796: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
3797: $thisfn='/res'.$thisfn;
3798: }
3799: return $thisfn;
3800: }
3801:
3802: # -------------------------------------------------------- Escape Special Chars
3803:
3804: sub escape {
3805: my $str=shift;
3806: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
3807: return $str;
3808: }
3809:
3810: # ----------------------------------------------------- Un-Escape Special Chars
3811:
3812: sub unescape {
3813: my $str=shift;
3814: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
3815: return $str;
3816: }
3817:
3818: # ================================================================ Main Program
3819:
3820: sub goodbye {
3821: &logthis("Starting Shut down");
3822: &flushcourselogs();
3823: &logthis("Shutting down");
3824: }
3825:
3826: BEGIN {
3827: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
3828: unless ($readit) {
3829: {
3830: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
3831:
3832: while (my $configline=<$config>) {
3833: if ($configline =~ /^[^\#]*PerlSetVar/) {
3834: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3835: chomp($varvalue);
3836: $perlvar{$varname}=$varvalue;
3837: }
3838: }
3839: }
3840: {
3841: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
3842:
3843: while (my $configline=<$config>) {
3844: if ($configline =~ /^[^\#]*PerlSetVar/) {
3845: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
3846: chomp($varvalue);
3847: $perlvar{$varname}=$varvalue;
3848: }
3849: }
3850: }
3851:
3852: # ------------------------------------------------------------ Read domain file
3853: {
3854: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
3855: '/domain.tab');
3856: %domaindescription = ();
3857: %domain_auth_def = ();
3858: %domain_auth_arg_def = ();
3859: if ($fh) {
3860: while (<$fh>) {
3861: next if /^\#/;
3862: chomp;
3863: my ($domain, $domain_description, $def_auth, $def_auth_arg)
3864: = split(/:/,$_,4);
3865: $domain_auth_def{$domain}=$def_auth;
3866: $domain_auth_arg_def{$domain}=$def_auth_arg;
3867: $domaindescription{$domain}=$domain_description;
3868: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
3869: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
3870: }
3871: }
3872: }
3873:
3874:
3875: # ------------------------------------------------------------- Read hosts file
3876: {
3877: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
3878:
3879: while (my $configline=<$config>) {
3880: next if ($configline =~ /^(\#|\s*$)/);
3881: chomp($configline);
3882: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
3883: if ($id && $domain && $role && $name && $ip) {
3884: $hostname{$id}=$name;
3885: $hostdom{$id}=$domain;
3886: $hostip{$id}=$ip;
3887: $iphost{$ip}=$id;
3888: if ($role eq 'library') { $libserv{$id}=$name; }
3889: } else {
3890: if ($configline) {
3891: &logthis("Skipping hosts.tab line -$configline-");
3892: }
3893: }
3894: }
3895: }
3896:
3897: # ------------------------------------------------------ Read spare server file
3898: {
3899: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
3900:
3901: while (my $configline=<$config>) {
3902: chomp($configline);
3903: if ($configline) {
3904: $spareid{$configline}=1;
3905: }
3906: }
3907: }
3908: # ------------------------------------------------------------ Read permissions
3909: {
3910: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
3911:
3912: while (my $configline=<$config>) {
3913: chomp($configline);
3914: if ($configline) {
3915: my ($role,$perm)=split(/ /,$configline);
3916: if ($perm ne '') { $pr{$role}=$perm; }
3917: }
3918: }
3919: }
3920:
3921: # -------------------------------------------- Read plain texts for permissions
3922: {
3923: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
3924:
3925: while (my $configline=<$config>) {
3926: chomp($configline);
3927: if ($configline) {
3928: my ($short,$plain)=split(/:/,$configline);
3929: if ($plain ne '') { $prp{$short}=$plain; }
3930: }
3931: }
3932: }
3933:
3934: # ---------------------------------------------------------- Read package table
3935: {
3936: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
3937:
3938: while (my $configline=<$config>) {
3939: chomp($configline);
3940: my ($short,$plain)=split(/:/,$configline);
3941: my ($pack,$name)=split(/\&/,$short);
3942: if ($plain ne '') {
3943: $packagetab{$pack.'&'.$name.'&name'}=$name;
3944: $packagetab{$short}=$plain;
3945: }
3946: }
3947: }
3948:
3949: # ------------- set up temporary directory
3950: {
3951: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
3952:
3953: }
3954:
3955: %metacache=();
3956:
3957: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
3958: $dumpcount=0;
3959:
3960: &logtouch();
3961: &logthis('<font color=yellow>INFO: Read configuration</font>');
3962: $readit=1;
3963: }
3964: }
3965:
3966: 1;
3967: __END__
3968:
3969: =pod
3970:
3971: =head1 NAME
3972:
3973: Apache::lonnet - Subroutines to ask questions about things in the network.
3974:
3975: =head1 SYNOPSIS
3976:
3977: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
3978:
3979: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
3980:
3981: Common parameters:
3982:
3983: =over 4
3984:
3985: =item *
3986:
3987: $uname : an internal username (if $cname expecting a course Id specifically)
3988:
3989: =item *
3990:
3991: $udom : a domain (if $cdom expecting a course's domain specifically)
3992:
3993: =item *
3994:
3995: $symb : a resource instance identifier
3996:
3997: =item *
3998:
3999: $namespace : the name of a .db file that contains the data needed or
4000: being set.
4001:
4002: =back
4003:
4004: =head1 INTRODUCTION
4005:
4006: This module provides subroutines which interact with the
4007: lonc/lond (TCP) network layer of LON-CAPA. And Can be used to ask about
4008: - classes
4009: - users
4010: - resources
4011:
4012: For many of these objects you can also use this to store data about
4013: them or modify them in various ways.
4014:
4015: This is part of the LearningOnline Network with CAPA project
4016: described at http://www.lon-capa.org.
4017:
4018: =head1 RETURN MESSAGES
4019:
4020: =over 4
4021:
4022: =item *
4023:
4024: con_lost : unable to contact remote host
4025:
4026: =item *
4027:
4028: con_delayed : unable to contact remote host, message will be delivered
4029: when the connection is brought back up
4030:
4031: =item *
4032:
4033: con_failed : unable to contact remote host and unable to save message
4034: for later delivery
4035:
4036: =item *
4037:
4038: error: : an error a occured, a description of the error follows the :
4039:
4040: =item *
4041:
4042: no_such_host : unable to fund a host associated with the user/domain
4043: that was requested
4044:
4045: =back
4046:
4047: =head1 PUBLIC SUBROUTINES
4048:
4049: =head2 Session Environment Functions
4050:
4051: =over 4
4052:
4053: =item *
4054:
4055: appenv(%hash) : the value of %hash is written to the user envirnoment
4056: file, and will be restored for each access this user makes during this
4057: session, also modifies the %ENV for the current process
4058:
4059: =item *
4060:
4061: delenv($regexp) : removes all items from the session environment file that matches the regular expression in $regexp. The values are also delted from the current processes %ENV.
4062:
4063: =back
4064:
4065: =head2 User Information
4066:
4067: =over 4
4068:
4069: =item *
4070:
4071: queryauthenticate($uname,$udom) : try to determine user's current
4072: authentication scheme
4073:
4074: =item *
4075:
4076: authenticate($uname,$upass,$udom) : try to authenticate user from domain's lib
4077: servers (first use the current one), $upass should be the users password
4078:
4079: =item *
4080:
4081: homeserver($uname,$udom) : find the server which has the user's
4082: directory and files (there must be only one), this caches the answer,
4083: and also caches if there is a borken connection.
4084:
4085: =item *
4086:
4087: idget($udom,@ids) : find the usernames behind a list of IDs (IDs are a
4088: unique resource in a domain, there must be only 1 ID per username, and
4089: only 1 username per ID in a specific domain) (returns hash:
4090: id=>name,id=>name)
4091:
4092: =item *
4093:
4094: idrget($udom,@unames) : find the IDs behind a list of usernames (returns hash:
4095: name=>id,name=>id)
4096:
4097: =item *
4098:
4099: idput($udom,%ids) : store away a list of names and associated IDs
4100:
4101: =item *
4102:
4103: rolesinit($udom,$username,$authhost) : get user privileges
4104:
4105: =item *
4106:
4107: usection($udom,$uname,$cname) : finds the section of student in the
4108: course $cname, return section name/number or '' for "not in course"
4109: and '-1' for "no section"
4110:
4111: =item *
4112:
4113: userenvironment($udom,$uname,@what) : gets the values of the keys
4114: passed in @what from the requested user's environment, returns a hash
4115:
4116: =back
4117:
4118: =head2 User Roles
4119:
4120: =over 4
4121:
4122: =item *
4123:
4124: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
4125: actions
4126: F: full access
4127: U,I,K: authentication modes (cxx only)
4128: '': forbidden
4129: 1: user needs to choose course
4130: 2: browse allowed
4131:
4132: =item *
4133:
4134: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4135: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4136: and course level
4137:
4138: =item *
4139:
4140: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4141: explanation of a user role term
4142:
4143: =back
4144:
4145: =head2 User Modification
4146:
4147: =over 4
4148:
4149: =item *
4150:
4151: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4152: user for the level given by URL. Optional start and end dates (leave empty
4153: string or zero for "no date")
4154:
4155: =item *
4156:
4157: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4158: change a users, password, possible return values are: ok,
4159: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4160: refused
4161:
4162: =item *
4163:
4164: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
4165:
4166: =item *
4167:
4168: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4169: modify user
4170:
4171: =item *
4172:
4173: modifystudent
4174:
4175: modify a students enrollment and identification information.
4176: The course id is resolved based on the current users environment.
4177: This means the envoking user must be a course coordinator or otherwise
4178: associated with a course.
4179:
4180: This call is essentially a wrapper for lonnet::modifyuser and
4181: lonnet::modify_student_enrollment
4182:
4183: Inputs:
4184:
4185: =over 4
4186:
4187: =item B<$udom> Students loncapa domain
4188:
4189: =item B<$uname> Students loncapa login name
4190:
4191: =item B<$uid> Students id/student number
4192:
4193: =item B<$umode> Students authentication mode
4194:
4195: =item B<$upass> Students password
4196:
4197: =item B<$first> Students first name
4198:
4199: =item B<$middle> Students middle name
4200:
4201: =item B<$last> Students last name
4202:
4203: =item B<$gene> Students generation
4204:
4205: =item B<$usec> Students section in course
4206:
4207: =item B<$end> Unix time of the roles expiration
4208:
4209: =item B<$start> Unix time of the roles start date
4210:
4211: =item B<$forceid> If defined, allow $uid to be changed
4212:
4213: =item B<$desiredhome> server to use as home server for student
4214:
4215: =back
4216:
4217: =item *
4218:
4219: modify_student_enrollment
4220:
4221: Change a students enrollment status in a class. The environment variable
4222: 'role.request.course' must be defined for this function to proceed.
4223:
4224: Inputs:
4225:
4226: =over 4
4227:
4228: =item $udom, students domain
4229:
4230: =item $uname, students name
4231:
4232: =item $uid, students user id
4233:
4234: =item $first, students first name
4235:
4236: =item $middle
4237:
4238: =item $last
4239:
4240: =item $gene
4241:
4242: =item $usec
4243:
4244: =item $end
4245:
4246: =item $start
4247:
4248: =back
4249:
4250:
4251: =item *
4252:
4253: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4254: custom role; give a custom role to a user for the level given by URL. Specify
4255: name and domain of role author, and role name
4256:
4257: =item *
4258:
4259: revokerole($udom,$uname,$url,$role) : revoke a role for url
4260:
4261: =item *
4262:
4263: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4264:
4265: =back
4266:
4267: =head2 Course Infomation
4268:
4269: =over 4
4270:
4271: =item *
4272:
4273: coursedescription($courseid) : course description
4274:
4275: =item *
4276:
4277: courseresdata($coursenum,$coursedomain,@which) : request for current
4278: parameter setting for a specific course, @what should be a list of
4279: parameters to ask about. This routine caches answers for 5 minutes.
4280:
4281: =back
4282:
4283: =head2 Course Modification
4284:
4285: =over 4
4286:
4287: =item *
4288:
4289: writecoursepref($courseid,%prefs) : write preferences (environment
4290: database) for a course
4291:
4292: =item *
4293:
4294: createcourse($udom,$description,$url) : make/modify course
4295:
4296: =back
4297:
4298: =head2 Resource Subroutines
4299:
4300: =over 4
4301:
4302: =item *
4303:
4304: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
4305:
4306: =item *
4307:
4308: repcopy($filename) : subscribes to the requested file, and attempts to
4309: replicate from the owning library server, Might return
4310: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4311: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4312: resource. Expects the local filesystem pathname
4313: (/home/httpd/html/res/....)
4314:
4315: =back
4316:
4317: =head2 Resource Information
4318:
4319: =over 4
4320:
4321: =item *
4322:
4323: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
4324: a vairety of different possible values, $varname should be a request
4325: string, and the other parameters can be used to specify who and what
4326: one is asking about.
4327:
4328: Possible values for $varname are environment.lastname (or other item
4329: from the envirnment hash), user.name (or someother aspect about the
4330: user), resource.0.maxtries (or some other part and parameter of a
4331: resource)
4332:
4333: =item *
4334:
4335: directcondval($number) : get current value of a condition; reads from a state
4336: string
4337:
4338: =item *
4339:
4340: condval($condidx) : value of condition index based on state
4341:
4342: =item *
4343:
4344: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
4345: resource's metadata, $what should be either a specific key, or either
4346: 'keys' (to get a list of possible keys) or 'packages' to get a list of
4347: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
4348:
4349: this function automatically caches all requests
4350:
4351: =item *
4352:
4353: metadata_query($query,$custom,$customshow) : make a metadata query against the
4354: network of library servers; returns file handle of where SQL and regex results
4355: will be stored for query
4356:
4357: =item *
4358:
4359: symbread($filename) : return symbolic list entry (filename argument optional);
4360: returns the data handle
4361:
4362: =item *
4363:
4364: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
4365: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
4366: failure, user must be in a course, as it assumes the existance of the
4367: course initi hash, and uses $ENV('request.course.id'}
4368:
4369:
4370: =item *
4371:
4372: symbclean($symb) : removes versions numbers from a symb, returns the
4373: cleaned symb
4374:
4375: =item *
4376:
4377: is_on_map($uri) : checks if the $uri is somewhere on the current
4378: course map, user must be in a course for it to work.
4379:
4380: =item *
4381:
4382: numval($salt) : return random seed value (addend for rndseed)
4383:
4384: =item *
4385:
4386: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
4387: a random seed, all arguments are optional, if they aren't sent it uses the
4388: environment to derive them. Note: if symb isn't sent and it can't get one
4389: from &symbread it will use the current time as its return value
4390:
4391: =item *
4392:
4393: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
4394: unfakeable, receipt
4395:
4396: =item *
4397:
4398: receipt() : API to ireceipt working off of ENV values; given out to users
4399:
4400: =item *
4401:
4402: countacc($url) : count the number of accesses to a given URL
4403:
4404: =item *
4405:
4406: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
4407:
4408: =item *
4409:
4410: checkin($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 $tcrsid)
4411:
4412: =item *
4413:
4414: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
4415:
4416: =item *
4417:
4418: devalidate($symb) : devalidate temporary spreadsheet calculations,
4419: forcing spreadsheet to reevaluate the resource scores next time.
4420:
4421: =back
4422:
4423: =head2 Storing/Retreiving Data
4424:
4425: =over 4
4426:
4427: =item *
4428:
4429: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
4430: for this url; hashref needs to be given and should be a \%hashname; the
4431: remaining args aren't required and if they aren't passed or are '' they will
4432: be derived from the ENV
4433:
4434: =item *
4435:
4436: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
4437: uses critical subroutine
4438:
4439: =item *
4440:
4441: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
4442: all args are optional
4443:
4444: =item *
4445:
4446: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
4447: works very similar to store/cstore, but all data is stored in a
4448: temporary location and can be reset using tmpreset, $storehash should
4449: be a hash reference, returns nothing on success
4450:
4451: =item *
4452:
4453: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
4454: similar to restore, but all data is stored in a temporary location and
4455: can be reset using tmpreset. Returns a hash of values on success,
4456: error string otherwise.
4457:
4458: =item *
4459:
4460: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
4461: deltes all keys for $symb form the temporary storage hash.
4462:
4463: =item *
4464:
4465: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4466: reference filled in from namesp ($udom and $uname are optional)
4467:
4468: =item *
4469:
4470: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
4471: namesp ($udom and $uname are optional)
4472:
4473: =item *
4474:
4475: dump($namespace,$udom,$uname,$regexp) :
4476: dumps the complete (or key matching regexp) namespace into a hash
4477: ($udom, $uname and $regexp are optional)
4478:
4479: =item *
4480:
4481: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
4482: ($udom and $uname are optional)
4483:
4484: =item *
4485:
4486: cput($namespace,$storehash,$udom,$uname) : critical put
4487: ($udom and $uname are optional)
4488:
4489: =item *
4490:
4491: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
4492: reference filled in from namesp (encrypts the return communication)
4493: ($udom and $uname are optional)
4494:
4495: =item *
4496:
4497: log($udom,$name,$home,$message) : write to permanent log for user; use
4498: critical subroutine
4499:
4500: =back
4501:
4502: =head2 Network Status Functions
4503:
4504: =over 4
4505:
4506: =item *
4507:
4508: dirlist($uri) : return directory list based on URI
4509:
4510: =item *
4511:
4512: spareserver() : find server with least workload from spare.tab
4513:
4514: =back
4515:
4516: =head2 Apache Request
4517:
4518: =over 4
4519:
4520: =item *
4521:
4522: ssi($url,%hash) : server side include, does a complete request cycle on url to
4523: localhost, posts hash
4524:
4525: =back
4526:
4527: =head2 Data to String to Data
4528:
4529: =over 4
4530:
4531: =item *
4532:
4533: hash2str(%hash) : convert a hash into a string complete with escaping and '='
4534: and '&' separators, supports elements that are arrayrefs and hashrefs
4535:
4536: =item *
4537:
4538: hashref2str($hashref) : convert a hashref into a string complete with
4539: escaping and '=' and '&' separators, supports elements that are
4540: arrayrefs and hashrefs
4541:
4542: =item *
4543:
4544: arrayref2str($arrayref) : convert an arrayref into a string complete
4545: with escaping and '&' separators, supports elements that are arrayrefs
4546: and hashrefs
4547:
4548: =item *
4549:
4550: str2hash($string) : convert string to hash using unescaping and
4551: splitting on '=' and '&', supports elements that are arrayrefs and
4552: hashrefs
4553:
4554: =item *
4555:
4556: str2array($string) : convert string to hash using unescaping and
4557: splitting on '&', supports elements that are arrayrefs and hashrefs
4558:
4559: =back
4560:
4561: =head2 Logging Routines
4562:
4563: =over 4
4564:
4565: These routines allow one to make log messages in the lonnet.log and
4566: lonnet.perm logfiles.
4567:
4568: =item *
4569:
4570: logtouch() : make sure the logfile, lonnet.log, exists
4571:
4572: =item *
4573:
4574: logthis() : append message to the normal lonnet.log file, it gets
4575: preiodically rolled over and deleted.
4576:
4577: =item *
4578:
4579: logperm() : append a permanent message to lonnet.perm.log, this log
4580: file never gets deleted by any automated portion of the system, only
4581: messages of critical importance should go in here.
4582:
4583: =back
4584:
4585: =head2 General File Helper Routines
4586:
4587: =over 4
4588:
4589: =item *
4590:
4591: getfile($file) : returns the entire contents of a file or -1; it
4592: properly subscribes to and replicates the file if neccessary.
4593:
4594: =item *
4595:
4596: filelocation($dir,$file) : returns file system location of a file
4597: based on URI; meant to be "fairly clean" absolute reference, $dir is a
4598: directory that relative $file lookups are to looked in ($dir of /a/dir
4599: and a file of ../bob will become /a/bob)
4600:
4601: =item *
4602:
4603: hreflocation($dir,$file) : returns file system location or a URL; same as
4604: filelocation except for hrefs
4605:
4606: =item *
4607:
4608: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
4609:
4610: =back
4611:
4612: =head2 HTTP Helper Routines
4613:
4614: =over 4
4615:
4616: =item *
4617:
4618: escape() : unpack non-word characters into CGI-compatible hex codes
4619:
4620: =item *
4621:
4622: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
4623:
4624: =back
4625:
4626: =head1 PRIVATE SUBROUTINES
4627:
4628: =head2 Underlying communication routines (Shouldn't call)
4629:
4630: =over 4
4631:
4632: =item *
4633:
4634: subreply() : tries to pass a message to lonc, returns con_lost if incapable
4635:
4636: =item *
4637:
4638: reply() : uses subreply to send a message to remote machine, logs all failures
4639:
4640: =item *
4641:
4642: critical() : passes a critical message to another server; if cannot
4643: get through then place message in connection buffer directory and
4644: returns con_delayed, if incapable of saving message, returns
4645: con_failed
4646:
4647: =item *
4648:
4649: reconlonc() : tries to reconnect lonc client processes.
4650:
4651: =back
4652:
4653: =head2 Resource Access Logging
4654:
4655: =over 4
4656:
4657: =item *
4658:
4659: flushcourselogs() : flush (save) buffer logs and access logs
4660:
4661: =item *
4662:
4663: courselog($what) : save message for course in hash
4664:
4665: =item *
4666:
4667: courseacclog($what) : save message for course using &courselog(). Perform
4668: special processing for specific resource types (problems, exams, quizzes, etc).
4669:
4670: =item *
4671:
4672: goodbye() : flush course logs and log shutting down; it is called in srm.conf
4673: as a PerlChildExitHandler
4674:
4675: =back
4676:
4677: =head2 Other
4678:
4679: =over 4
4680:
4681: =item *
4682:
4683: symblist($mapname,%newhash) : update symbolic storage links
4684:
4685: =back
4686:
4687: =cut
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