1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.433 2003/10/27 21:59:34 matthew 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: %userresdatacache %usectioncache %domaindescription %domain_auth_def %domain_auth_arg_def
80: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir);
81:
82: use IO::Socket;
83: use GDBM_File;
84: use Apache::Constants qw(:common :http);
85: use HTML::LCParser;
86: use Fcntl qw(:flock);
87: use Apache::loncoursedata;
88: use Apache::lonlocal;
89: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw);
90: use Time::HiRes();
91: my $readit;
92:
93: # --------------------------------------------------------------------- Logging
94:
95: sub logtouch {
96: my $execdir=$perlvar{'lonDaemons'};
97: unless (-e "$execdir/logs/lonnet.log") {
98: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
99: close $fh;
100: }
101: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
102: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
103: }
104:
105: sub logthis {
106: my $message=shift;
107: my $execdir=$perlvar{'lonDaemons'};
108: my $now=time;
109: my $local=localtime($now);
110: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
111: print $fh "$local ($$): $message\n";
112: return 1;
113: }
114:
115: sub logperm {
116: my $message=shift;
117: my $execdir=$perlvar{'lonDaemons'};
118: my $now=time;
119: my $local=localtime($now);
120: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
121: print $fh "$now:$message:$local\n";
122: return 1;
123: }
124:
125: # -------------------------------------------------- Non-critical communication
126: sub subreply {
127: my ($cmd,$server)=@_;
128: my $peerfile="$perlvar{'lonSockDir'}/$server";
129: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
130: Type => SOCK_STREAM,
131: Timeout => 10)
132: or return "con_lost";
133: print $client "$cmd\n";
134: my $answer=<$client>;
135: if (!$answer) { $answer="con_lost"; }
136: chomp($answer);
137: return $answer;
138: }
139:
140: sub reply {
141: my ($cmd,$server)=@_;
142: unless (defined($hostname{$server})) { return 'no_such_host'; }
143: my $answer=subreply($cmd,$server);
144: if ($answer eq 'con_lost') {
145: #sleep 5;
146: #$answer=subreply($cmd,$server);
147: #if ($answer eq 'con_lost') {
148: # &logthis("Second attempt con_lost on $server");
149: # my $peerfile="$perlvar{'lonSockDir'}/$server";
150: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
151: # Type => SOCK_STREAM,
152: # Timeout => 10)
153: # or return "con_lost";
154: # &logthis("Killing socket");
155: # print $client "close_connection_exit\n";
156: #sleep 5;
157: # $answer=subreply($cmd,$server);
158: #}
159: }
160: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
161: &logthis("<font color=blue>WARNING:".
162: " $cmd to $server returned $answer</font>");
163: }
164: return $answer;
165: }
166:
167: # ----------------------------------------------------------- Send USR1 to lonc
168:
169: sub reconlonc {
170: my $peerfile=shift;
171: &logthis("Trying to reconnect for $peerfile");
172: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
173: if (my $fh=Apache::File->new("$loncfile")) {
174: my $loncpid=<$fh>;
175: chomp($loncpid);
176: if (kill 0 => $loncpid) {
177: &logthis("lonc at pid $loncpid responding, sending USR1");
178: kill USR1 => $loncpid;
179: sleep 1;
180: if (-e "$peerfile") { return; }
181: &logthis("$peerfile still not there, give it another try");
182: sleep 5;
183: if (-e "$peerfile") { return; }
184: &logthis(
185: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
186: } else {
187: &logthis(
188: "<font color=blue>WARNING:".
189: " lonc at pid $loncpid not responding, giving up</font>");
190: }
191: } else {
192: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
193: }
194: }
195:
196: # ------------------------------------------------------ Critical communication
197:
198: sub critical {
199: my ($cmd,$server)=@_;
200: unless ($hostname{$server}) {
201: &logthis("<font color=blue>WARNING:".
202: " Critical message to unknown server ($server)</font>");
203: return 'no_such_host';
204: }
205: my $answer=reply($cmd,$server);
206: if ($answer eq 'con_lost') {
207: my $pingreply=reply('ping',$server);
208: &reconlonc("$perlvar{'lonSockDir'}/$server");
209: my $pongreply=reply('pong',$server);
210: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
211: $answer=reply($cmd,$server);
212: if ($answer eq 'con_lost') {
213: my $now=time;
214: my $middlename=$cmd;
215: $middlename=substr($middlename,0,16);
216: $middlename=~s/\W//g;
217: my $dfilename=
218: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
219: $dumpcount++;
220: {
221: my $dfh;
222: if ($dfh=Apache::File->new(">$dfilename")) {
223: print $dfh "$cmd\n";
224: }
225: }
226: sleep 2;
227: my $wcmd='';
228: {
229: my $dfh;
230: if ($dfh=Apache::File->new("$dfilename")) {
231: $wcmd=<$dfh>;
232: }
233: }
234: chomp($wcmd);
235: if ($wcmd eq $cmd) {
236: &logthis("<font color=blue>WARNING: ".
237: "Connection buffer $dfilename: $cmd</font>");
238: &logperm("D:$server:$cmd");
239: return 'con_delayed';
240: } else {
241: &logthis("<font color=red>CRITICAL:"
242: ." Critical connection failed: $server $cmd</font>");
243: &logperm("F:$server:$cmd");
244: return 'con_failed';
245: }
246: }
247: }
248: return $answer;
249: }
250:
251: #
252: # -------------- Remove all key from the env that start witha lowercase letter
253: # (Which is always a lon-capa value)
254:
255: sub cleanenv {
256: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
257: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
258: foreach my $key (keys(%ENV)) {
259: if ($key =~ /^[a-z]/) {
260: delete($ENV{$key});
261: }
262: }
263: }
264:
265: # ------------------------------------------- Transfer profile into environment
266:
267: sub transfer_profile_to_env {
268: my ($lonidsdir,$handle)=@_;
269: my @profile;
270: {
271: my $idf=Apache::File->new("$lonidsdir/$handle.id");
272: flock($idf,LOCK_SH);
273: @profile=<$idf>;
274: $idf->close();
275: }
276: my $envi;
277: my %Remove;
278: for ($envi=0;$envi<=$#profile;$envi++) {
279: chomp($profile[$envi]);
280: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
281: $ENV{$envname} = $envvalue;
282: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
283: if ($time < time-300) {
284: $Remove{$key}++;
285: }
286: }
287: }
288: foreach my $expired_key (keys(%Remove)) {
289: &delenv($expired_key);
290: }
291: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
292: }
293:
294: # ---------------------------------------------------------- Append Environment
295:
296: sub appenv {
297: my %newenv=@_;
298: foreach (keys %newenv) {
299: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
300: &logthis("<font color=blue>WARNING: ".
301: "Attempt to modify environment ".$_." to ".$newenv{$_}
302: .'</font>');
303: delete($newenv{$_});
304: } else {
305: $ENV{$_}=$newenv{$_};
306: }
307: }
308:
309: my $lockfh;
310: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
311: return 'error: '.$!;
312: }
313: unless (flock($lockfh,LOCK_EX)) {
314: &logthis("<font color=blue>WARNING: ".
315: 'Could not obtain exclusive lock in appenv: '.$!);
316: $lockfh->close();
317: return 'error: '.$!;
318: }
319:
320: my @oldenv;
321: {
322: my $fh;
323: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
324: return 'error: '.$!;
325: }
326: @oldenv=<$fh>;
327: $fh->close();
328: }
329: for (my $i=0; $i<=$#oldenv; $i++) {
330: chomp($oldenv[$i]);
331: if ($oldenv[$i] ne '') {
332: my ($name,$value)=split(/=/,$oldenv[$i]);
333: unless (defined($newenv{$name})) {
334: $newenv{$name}=$value;
335: }
336: }
337: }
338: {
339: my $fh;
340: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
341: return 'error';
342: }
343: my $newname;
344: foreach $newname (keys %newenv) {
345: print $fh "$newname=$newenv{$newname}\n";
346: }
347: $fh->close();
348: }
349:
350: $lockfh->close();
351: return 'ok';
352: }
353: # ----------------------------------------------------- Delete from Environment
354:
355: sub delenv {
356: my $delthis=shift;
357: my %newenv=();
358: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
359: &logthis("<font color=blue>WARNING: ".
360: "Attempt to delete from environment ".$delthis);
361: return 'error';
362: }
363: my @oldenv;
364: {
365: my $fh;
366: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
367: return 'error';
368: }
369: unless (flock($fh,LOCK_SH)) {
370: &logthis("<font color=blue>WARNING: ".
371: 'Could not obtain shared lock in delenv: '.$!);
372: $fh->close();
373: return 'error: '.$!;
374: }
375: @oldenv=<$fh>;
376: $fh->close();
377: }
378: {
379: my $fh;
380: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
381: return 'error';
382: }
383: unless (flock($fh,LOCK_EX)) {
384: &logthis("<font color=blue>WARNING: ".
385: 'Could not obtain exclusive lock in delenv: '.$!);
386: $fh->close();
387: return 'error: '.$!;
388: }
389: foreach (@oldenv) {
390: unless ($_=~/^$delthis/) { print $fh $_; }
391: }
392: $fh->close();
393: }
394: return 'ok';
395: }
396:
397: # ------------------------------------------ Find out current server userload
398: # there is a copy in lond
399: sub userload {
400: my $numusers=0;
401: {
402: opendir(LONIDS,$perlvar{'lonIDsDir'});
403: my $filename;
404: my $curtime=time;
405: while ($filename=readdir(LONIDS)) {
406: if ($filename eq '.' || $filename eq '..') {next;}
407: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
408: if ($curtime-$mtime < 3600) { $numusers++; }
409: }
410: closedir(LONIDS);
411: }
412: my $userloadpercent=0;
413: my $maxuserload=$perlvar{'lonUserLoadLim'};
414: if ($maxuserload) {
415: $userloadpercent=100*$numusers/$maxuserload;
416: }
417: $userloadpercent=sprintf("%.2f",$userloadpercent);
418: return $userloadpercent;
419: }
420:
421: # ------------------------------------------ Fight off request when overloaded
422:
423: sub overloaderror {
424: my ($r,$checkserver)=@_;
425: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
426: my $loadavg;
427: if ($checkserver eq $perlvar{'lonHostID'}) {
428: my $loadfile=Apache::File->new('/proc/loadavg');
429: $loadavg=<$loadfile>;
430: $loadavg =~ s/\s.*//g;
431: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
432: } else {
433: $loadavg=&reply('load',$checkserver);
434: }
435: my $overload=$loadavg-100;
436: if ($overload>0) {
437: $r->err_headers_out->{'Retry-After'}=$overload;
438: $r->log_error('Overload of '.$overload.' on '.$checkserver);
439: return 413;
440: }
441: return '';
442: }
443:
444: # ------------------------------ Find server with least workload from spare.tab
445:
446: sub spareserver {
447: my ($loadpercent,$userloadpercent) = @_;
448: my $tryserver;
449: my $spareserver='';
450: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
451: my $lowestserver=$loadpercent > $userloadpercent?
452: $loadpercent : $userloadpercent;
453: foreach $tryserver (keys %spareid) {
454: my $loadans=reply('load',$tryserver);
455: my $userloadans=reply('userload',$tryserver);
456: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
457: next; #didn't get a number from the server
458: }
459: my $answer;
460: if ($loadans =~ /\d/) {
461: if ($userloadans =~ /\d/) {
462: #both are numbers, pick the bigger one
463: $answer=$loadans > $userloadans?
464: $loadans : $userloadans;
465: } else {
466: $answer = $loadans;
467: }
468: } else {
469: $answer = $userloadans;
470: }
471: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
472: $spareserver="http://$hostname{$tryserver}";
473: $lowestserver=$answer;
474: }
475: }
476: return $spareserver;
477: }
478:
479: # --------------------------------------------- Try to change a user's password
480:
481: sub changepass {
482: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
483: $currentpass = &escape($currentpass);
484: $newpass = &escape($newpass);
485: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
486: $server);
487: if (! $answer) {
488: &logthis("No reply on password change request to $server ".
489: "by $uname in domain $udom.");
490: } elsif ($answer =~ "^ok") {
491: &logthis("$uname in $udom successfully changed their password ".
492: "on $server.");
493: } elsif ($answer =~ "^pwchange_failure") {
494: &logthis("$uname in $udom was unable to change their password ".
495: "on $server. The action was blocked by either lcpasswd ".
496: "or pwchange");
497: } elsif ($answer =~ "^non_authorized") {
498: &logthis("$uname in $udom did not get their password correct when ".
499: "attempting to change it on $server.");
500: } elsif ($answer =~ "^auth_mode_error") {
501: &logthis("$uname in $udom attempted to change their password despite ".
502: "not being locally or internally authenticated on $server.");
503: } elsif ($answer =~ "^unknown_user") {
504: &logthis("$uname in $udom attempted to change their password ".
505: "on $server but were unable to because $server is not ".
506: "their home server.");
507: } elsif ($answer =~ "^refused") {
508: &logthis("$server refused to change $uname in $udom password because ".
509: "it was sent an unencrypted request to change the password.");
510: }
511: return $answer;
512: }
513:
514: # ----------------------- Try to determine user's current authentication scheme
515:
516: sub queryauthenticate {
517: my ($uname,$udom)=@_;
518: if (($perlvar{'lonRole'} eq 'library') &&
519: ($udom eq $perlvar{'lonDefDomain'})) {
520: my $answer=reply("encrypt:currentauth:$udom:$uname",
521: $perlvar{'lonHostID'});
522: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
523: if (length($answer)) {
524: return $answer;
525: }
526: else {
527: &logthis("User $uname at $udom lacks an authentication mechanism");
528: return 'no_host';
529: }
530: }
531: }
532:
533: my $tryserver;
534: foreach $tryserver (keys %libserv) {
535: if ($hostdom{$tryserver} eq $udom) {
536: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
537: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
538: if (length($answer)) {
539: return $answer;
540: }
541: else {
542: &logthis("User $uname at $udom lacks an authentication mechanism");
543: return 'no_host';
544: }
545: }
546: }
547: }
548: &logthis("User $uname at $udom lacks an authentication mechanism");
549: return 'no_host';
550: }
551:
552: # --------- Try to authenticate user from domain's lib servers (first this one)
553:
554: sub authenticate {
555: my ($uname,$upass,$udom)=@_;
556: $upass=escape($upass);
557: $uname=~s/\W//g;
558: if (($perlvar{'lonRole'} eq 'library') &&
559: ($udom eq $perlvar{'lonDefDomain'})) {
560: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
561: if ($answer =~ /authorized/) {
562: if ($answer eq 'authorized') {
563: &logthis("User $uname at $udom authorized by local server");
564: return $perlvar{'lonHostID'};
565: }
566: if ($answer eq 'non_authorized') {
567: &logthis("User $uname at $udom rejected by local server");
568: return 'no_host';
569: }
570: }
571: }
572:
573: my $tryserver;
574: foreach $tryserver (keys %libserv) {
575: if ($hostdom{$tryserver} eq $udom) {
576: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
577: if ($answer =~ /authorized/) {
578: if ($answer eq 'authorized') {
579: &logthis("User $uname at $udom authorized by $tryserver");
580: return $tryserver;
581: }
582: if ($answer eq 'non_authorized') {
583: &logthis("User $uname at $udom rejected by $tryserver");
584: return 'no_host';
585: }
586: }
587: }
588: }
589: &logthis("User $uname at $udom could not be authenticated");
590: return 'no_host';
591: }
592:
593: # ---------------------- Find the homebase for a user from domain's lib servers
594:
595: sub homeserver {
596: my ($uname,$udom,$ignoreBadCache)=@_;
597: my $index="$uname:$udom";
598:
599: my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
600: if (defined($cached)) { return $result; }
601: my $tryserver;
602: foreach $tryserver (keys %libserv) {
603: next if ($ignoreBadCache ne 'true' &&
604: exists($badServerCache{$tryserver}));
605: if ($hostdom{$tryserver} eq $udom) {
606: my $answer=reply("home:$udom:$uname",$tryserver);
607: if ($answer eq 'found') {
608: return &do_cache(\%homecache,$index,$tryserver,'home');
609: } elsif ($answer eq 'no_host') {
610: $badServerCache{$tryserver}=1;
611: }
612: }
613: }
614: return 'no_host';
615: }
616:
617: # ------------------------------------- Find the usernames behind a list of IDs
618:
619: sub idget {
620: my ($udom,@ids)=@_;
621: my %returnhash=();
622:
623: my $tryserver;
624: foreach $tryserver (keys %libserv) {
625: if ($hostdom{$tryserver} eq $udom) {
626: my $idlist=join('&',@ids);
627: $idlist=~tr/A-Z/a-z/;
628: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
629: my @answer=();
630: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
631: @answer=split(/\&/,$reply);
632: } ;
633: my $i;
634: for ($i=0;$i<=$#ids;$i++) {
635: if ($answer[$i]) {
636: $returnhash{$ids[$i]}=$answer[$i];
637: }
638: }
639: }
640: }
641: return %returnhash;
642: }
643:
644: # ------------------------------------- Find the IDs behind a list of usernames
645:
646: sub idrget {
647: my ($udom,@unames)=@_;
648: my %returnhash=();
649: foreach (@unames) {
650: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
651: }
652: return %returnhash;
653: }
654:
655: # ------------------------------- Store away a list of names and associated IDs
656:
657: sub idput {
658: my ($udom,%ids)=@_;
659: my %servers=();
660: foreach (keys %ids) {
661: my $uhom=&homeserver($_,$udom);
662: if ($uhom ne 'no_host') {
663: my $id=&escape($ids{$_});
664: $id=~tr/A-Z/a-z/;
665: my $unam=&escape($_);
666: if ($servers{$uhom}) {
667: $servers{$uhom}.='&'.$id.'='.$unam;
668: } else {
669: $servers{$uhom}=$id.'='.$unam;
670: }
671: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
672: }
673: }
674: foreach (keys %servers) {
675: &critical('idput:'.$udom.':'.$servers{$_},$_);
676: }
677: }
678:
679: # --------------------------------------------------- Assign a key to a student
680:
681: sub assign_access_key {
682: #
683: # a valid key looks like uname:udom#comments
684: # comments are being appended
685: #
686: my ($ckey,$cdom,$cnum,$udom,$uname,$logentry)=@_;
687: $cdom=
688: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
689: $cnum=
690: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
691: $udom=$ENV{'user.name'} unless (defined($udom));
692: $uname=$ENV{'user.domain'} unless (defined($uname));
693: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
694: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
695: ($existing{$ckey}=~/^$uname\:$udom\#(.*)$/)) {
696: # assigned to this person
697: # - this should not happen,
698: # unless something went wrong
699: # the first time around
700: # ready to assign
701: $logentry=$1.'; '.$logentry;
702: if (&put('accesskey',{$ckey=>$uname.':'.$udom.'#'.$logentry},
703: $cdom,$cnum) eq 'ok') {
704: # key now belongs to user
705: my $envkey='key.'.$cdom.'_'.$cnum;
706: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
707: &appenv('environment.'.$envkey => $ckey);
708: return 'ok';
709: } else {
710: return
711: 'error: Count not permanently assign key, will need to be re-entered later.';
712: }
713: } else {
714: return 'error: Could not assign key, try again later.';
715: }
716: } elsif (!$existing{$ckey}) {
717: # the key does not exist
718: return 'error: The key does not exist';
719: } else {
720: # the key is somebody else's
721: return 'error: The key is already in use';
722: }
723: }
724:
725: # ------------------------------------------ put an additional comment on a key
726:
727: sub comment_access_key {
728: #
729: # a valid key looks like uname:udom#comments
730: # comments are being appended
731: #
732: my ($ckey,$cdom,$cnum,$logentry)=@_;
733: $cdom=
734: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
735: $cnum=
736: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
737: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
738: if ($existing{$ckey}) {
739: $existing{$ckey}.='; '.$logentry;
740: # ready to assign
741: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
742: $cdom,$cnum) eq 'ok') {
743: return 'ok';
744: } else {
745: return 'error: Count not store comment.';
746: }
747: } else {
748: # the key does not exist
749: return 'error: The key does not exist';
750: }
751: }
752:
753: # ------------------------------------------------------ Generate a set of keys
754:
755: sub generate_access_keys {
756: my ($number,$cdom,$cnum,$logentry)=@_;
757: $cdom=
758: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
759: $cnum=
760: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
761: unless (&allowed('mky',$cdom)) { return 0; }
762: unless (($cdom) && ($cnum)) { return 0; }
763: if ($number>10000) { return 0; }
764: sleep(2); # make sure don't get same seed twice
765: srand(time()^($$+($$<<15))); # from "Programming Perl"
766: my $total=0;
767: for (my $i=1;$i<=$number;$i++) {
768: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
769: sprintf("%lx",int(100000*rand)).'-'.
770: sprintf("%lx",int(100000*rand));
771: $newkey=~s/1/g/g; # folks mix up 1 and l
772: $newkey=~s/0/h/g; # and also 0 and O
773: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
774: if ($existing{$newkey}) {
775: $i--;
776: } else {
777: if (&put('accesskeys',
778: { $newkey => '# generated '.localtime().
779: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
780: '; '.$logentry },
781: $cdom,$cnum) eq 'ok') {
782: $total++;
783: }
784: }
785: }
786: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
787: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
788: return $total;
789: }
790:
791: # ------------------------------------------------------- Validate an accesskey
792:
793: sub validate_access_key {
794: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
795: $cdom=
796: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
797: $cnum=
798: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
799: $udom=$ENV{'user.name'} unless (defined($udom));
800: $uname=$ENV{'user.domain'} unless (defined($uname));
801: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
802: return ($existing{$ckey}=~/^$uname\:$udom\#/);
803: }
804:
805: # ------------------------------------- Find the section of student in a course
806:
807: sub getsection {
808: my ($udom,$unam,$courseid)=@_;
809: $courseid=~s/\_/\//g;
810: $courseid=~s/^(\w)/\/$1/;
811: my %Pending;
812: my %Expired;
813: #
814: # Each role can either have not started yet (pending), be active,
815: # or have expired.
816: #
817: # If there is an active role, we are done.
818: #
819: # If there is more than one role which has not started yet,
820: # choose the one which will start sooner
821: # If there is one role which has not started yet, return it.
822: #
823: # If there is more than one expired role, choose the one which ended last.
824: # If there is a role which has expired, return it.
825: #
826: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
827: &homeserver($unam,$udom)))) {
828: my ($key,$value)=split(/\=/,$_);
829: $key=&unescape($key);
830: next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
831: my $section=$1;
832: if ($key eq $courseid.'_st') { $section=''; }
833: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
834: my $now=time;
835: if (defined($end) && ($now > $end)) {
836: $Expired{$end}=$section;
837: next;
838: }
839: if (defined($start) && ($now < $start)) {
840: $Pending{$start}=$section;
841: next;
842: }
843: return $section;
844: }
845: #
846: # Presumedly there will be few matching roles from the above
847: # loop and the sorting time will be negligible.
848: if (scalar(keys(%Pending))) {
849: my ($time) = sort {$a <=> $b} keys(%Pending);
850: return $Pending{$time};
851: }
852: if (scalar(keys(%Expired))) {
853: my @sorted = sort {$a <=> $b} keys(%Expired);
854: my $time = pop(@sorted);
855: return $Expired{$time};
856: }
857: return '-1';
858: }
859:
860: sub devalidate_cache {
861: my ($cache,$id,$name) = @_;
862: delete $$cache{$id.'.time'};
863: delete $$cache{$id};
864: my $filename=$perlvar{'lonDaemons'}.'/tmp/'.$name.".db";
865: open(DB,"$filename.lock");
866: flock(DB,LOCK_EX);
867: my %hash;
868: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
869: delete($hash{$id});
870: delete($hash{$id.'.time'});
871: } else {
872: &logthis("Unable to tie hash");
873: }
874: untie(%hash);
875: flock(DB,LOCK_UN);
876: close(DB);
877: }
878:
879: sub is_cached {
880: my ($cache,$id,$name,$time) = @_;
881: if (!$time) { $time=300; }
882: if (!exists($$cache{$id.'.time'})) {
883: &load_cache_item($cache,$name,$id);
884: }
885: if (!exists($$cache{$id.'.time'})) {
886: # &logthis("Didn't find $id");
887: return (undef,undef);
888: } else {
889: if (time-($$cache{$id.'.time'})>$time) {
890: # &logthis("Devailidating $id - ".time-($$cache{$id.'.time'}));
891: &devalidate_cache($cache,$id,$name);
892: return (undef,undef);
893: }
894: }
895: return ($$cache{$id},1);
896: }
897:
898: sub do_cache {
899: my ($cache,$id,$value,$name) = @_;
900: $$cache{$id.'.time'}=time;
901: $$cache{$id}=$value;
902: # &logthis("Caching $id as :$value:");
903: &save_cache_item($cache,$name,$id);
904: # do_cache implictly return the set value
905: $$cache{$id};
906: }
907:
908: sub save_cache {
909: my ($cache,$name)=@_;
910: my $starttime=&Time::HiRes::time();
911: # &logthis("Saving :$name:");
912: eval lock_store($cache,$perlvar{'lonDaemons'}.'/tmp/'.$name.".storable");
913: if ($@) { &logthis("lock_store threw a die ".$@); }
914: # &logthis("save_cache took ".(&Time::HiRes::time()-$starttime));
915: }
916:
917: sub load_cache {
918: my ($cache,$name)=@_;
919: my $starttime=&Time::HiRes::time();
920: # &logthis("Before Loading $name size is ".scalar(%$cache));
921: my $tmpcache;
922: eval {
923: $tmpcache=lock_retrieve($perlvar{'lonDaemons'}.'/tmp/'.$name.".storable");
924: };
925: if ($@) { &logthis("lock_retreive threw a die ".$@); return; }
926: if (!%$cache) {
927: my $count;
928: while (my ($key,$value)=each(%$tmpcache)) {
929: $count++;
930: $$cache{$key}=$value;
931: }
932: # &logthis("Initial load: $count");
933: } else {
934: my $key;
935: my $count;
936: while ($key=each(%$tmpcache)) {
937: if ($key !~/^(.*)\.time$/) { next; }
938: my $name=$1;
939: if (exists($$cache{$key})) {
940: if ($$tmpcache{$key} >= $$cache{$key}) {
941: $$cache{$key}=$$tmpcache{$key};
942: $$cache{$name}=$$tmpcache{$name};
943: } else {
944: # &logthis("Would have overwritten $name with is set to expire at ".$$cache{$key}." with ".$$tmpcache{$key}." Whew!");
945: }
946: } else {
947: $count++;
948: $$cache{$key}=$$tmpcache{$key};
949: $$cache{$name}=$$tmpcache{$name};
950: }
951: }
952: # &logthis("Additional load: $count");
953: }
954: # &logthis("After Loading $name size is ".scalar(%$cache));
955: # &logthis("load_cache took ".(&Time::HiRes::time()-$starttime));
956: }
957:
958: sub save_cache_item {
959: my ($cache,$name,$id)=@_;
960: my $starttime=&Time::HiRes::time();
961: # &logthis("Saving :$name:$id");
962: my %hash;
963: my $filename=$perlvar{'lonDaemons'}.'/tmp/'.$name.".db";
964: open(DB,"$filename.lock");
965: flock(DB,LOCK_EX);
966: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
967: $hash{$id.'.time'}=$$cache{$id.'.time'};
968: $hash{$id}=freeze({'item'=>$$cache{$id}});
969: } else {
970: &logthis("Unable to tie hash");
971: }
972: untie(%hash);
973: flock(DB,LOCK_UN);
974: close(DB);
975: # &logthis("save_cache_item $name took ".(&Time::HiRes::time()-$starttime));
976: }
977:
978: sub load_cache_item {
979: my ($cache,$name,$id)=@_;
980: my $starttime=&Time::HiRes::time();
981: # &logthis("Before Loading $name for $id size is ".scalar(%$cache));
982: my %hash;
983: my $filename=$perlvar{'lonDaemons'}.'/tmp/'.$name.".db";
984: open(DB,"$filename.lock");
985: flock(DB,LOCK_SH);
986: if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
987: if (!%$cache) {
988: my $count;
989: while (my ($key,$value)=each(%hash)) {
990: $count++;
991: if ($key =~ /\.time$/) {
992: $$cache{$key}=$value;
993: } else {
994: my $hashref=thaw($value);
995: $$cache{$key}=$hashref->{'item'};
996: }
997: }
998: # &logthis("Initial load: $count");
999: } else {
1000: my $hashref=thaw($hash{$id});
1001: $$cache{$id}=$hashref->{'item'};
1002: $$cache{$id.'.time'}=$hash{$id.'.time'};
1003: }
1004: } else {
1005: &logthis("Unable to tie hash");
1006: }
1007: untie(%hash);
1008: flock(DB,LOCK_UN);
1009: close(DB);
1010: # &logthis("After Loading $name size is ".scalar(%$cache));
1011: # &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
1012: }
1013:
1014: sub usection {
1015: my ($udom,$unam,$courseid)=@_;
1016: my $hashid="$udom:$unam:$courseid";
1017:
1018: my ($result,$cached)=&is_cached(\%usectioncache,$hashid,'usection');
1019: if (defined($cached)) { return $result; }
1020: $courseid=~s/\_/\//g;
1021: $courseid=~s/^(\w)/\/$1/;
1022: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
1023: &homeserver($unam,$udom)))) {
1024: my ($key,$value)=split(/\=/,$_);
1025: $key=&unescape($key);
1026: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
1027: my $section=$1;
1028: if ($key eq $courseid.'_st') { $section=''; }
1029: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
1030: my $now=time;
1031: my $notactive=0;
1032: if ($start) {
1033: if ($now<$start) { $notactive=1; }
1034: }
1035: if ($end) {
1036: if ($now>$end) { $notactive=1; }
1037: }
1038: unless ($notactive) {
1039: return &do_cache(\%usectioncache,$hashid,$section,'usection');
1040: }
1041: }
1042: }
1043: return &do_cache(\%usectioncache,$hashid,'-1','usection');
1044: }
1045:
1046: # ------------------------------------- Read an entry from a user's environment
1047:
1048: sub userenvironment {
1049: my ($udom,$unam,@what)=@_;
1050: my %returnhash=();
1051: my @answer=split(/\&/,
1052: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1053: &homeserver($unam,$udom)));
1054: my $i;
1055: for ($i=0;$i<=$#what;$i++) {
1056: $returnhash{$what[$i]}=&unescape($answer[$i]);
1057: }
1058: return %returnhash;
1059: }
1060:
1061: # -------------------------------------------------------------------- New chat
1062:
1063: sub chatsend {
1064: my ($newentry,$anon)=@_;
1065: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1066: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1067: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1068: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1069: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
1070: &escape($newentry)),$chome);
1071: }
1072:
1073: # ------------------------------------------ Find current version of a resource
1074:
1075: sub getversion {
1076: my $fname=&clutter(shift);
1077: unless ($fname=~/^\/res\//) { return -1; }
1078: return ¤tversion(&filelocation('',$fname));
1079: }
1080:
1081: sub currentversion {
1082: my $fname=shift;
1083: my $author=$fname;
1084: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1085: my ($udom,$uname)=split(/\//,$author);
1086: my $home=homeserver($uname,$udom);
1087: if ($home eq 'no_host') {
1088: return -1;
1089: }
1090: my $answer=reply("currentversion:$fname",$home);
1091: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1092: return -1;
1093: }
1094: return $answer;
1095: }
1096:
1097: # ----------------------------- Subscribe to a resource, return URL if possible
1098:
1099: sub subscribe {
1100: my $fname=shift;
1101: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1102: my $author=$fname;
1103: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1104: my ($udom,$uname)=split(/\//,$author);
1105: my $home=homeserver($uname,$udom);
1106: if ($home eq 'no_host') {
1107: return 'not_found';
1108: }
1109: my $answer=reply("sub:$fname",$home);
1110: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1111: $answer.=' by '.$home;
1112: }
1113: return $answer;
1114: }
1115:
1116: # -------------------------------------------------------------- Replicate file
1117:
1118: sub repcopy {
1119: my $filename=shift;
1120: $filename=~s/\/+/\//g;
1121: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
1122: my $transname="$filename.in.transfer";
1123: if ((-e $filename) || (-e $transname)) { return OK; }
1124: my $remoteurl=subscribe($filename);
1125: if ($remoteurl =~ /^con_lost by/) {
1126: &logthis("Subscribe returned $remoteurl: $filename");
1127: return HTTP_SERVICE_UNAVAILABLE;
1128: } elsif ($remoteurl eq 'not_found') {
1129: &logthis("Subscribe returned not_found: $filename");
1130: return HTTP_NOT_FOUND;
1131: } elsif ($remoteurl =~ /^rejected by/) {
1132: &logthis("Subscribe returned $remoteurl: $filename");
1133: return FORBIDDEN;
1134: } elsif ($remoteurl eq 'directory') {
1135: return OK;
1136: } else {
1137: my $author=$filename;
1138: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1139: my ($udom,$uname)=split(/\//,$author);
1140: my $home=homeserver($uname,$udom);
1141: unless ($home eq $perlvar{'lonHostID'}) {
1142: my @parts=split(/\//,$filename);
1143: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1144: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1145: &logthis("Malconfiguration for replication: $filename");
1146: return HTTP_BAD_REQUEST;
1147: }
1148: my $count;
1149: for ($count=5;$count<$#parts;$count++) {
1150: $path.="/$parts[$count]";
1151: if ((-e $path)!=1) {
1152: mkdir($path,0777);
1153: }
1154: }
1155: my $ua=new LWP::UserAgent;
1156: my $request=new HTTP::Request('GET',"$remoteurl");
1157: my $response=$ua->request($request,$transname);
1158: if ($response->is_error()) {
1159: unlink($transname);
1160: my $message=$response->status_line;
1161: &logthis("<font color=blue>WARNING:"
1162: ." LWP get: $message: $filename</font>");
1163: return HTTP_SERVICE_UNAVAILABLE;
1164: } else {
1165: if ($remoteurl!~/\.meta$/) {
1166: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1167: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1168: if ($mresponse->is_error()) {
1169: unlink($filename.'.meta');
1170: &logthis(
1171: "<font color=yellow>INFO: No metadata: $filename</font>");
1172: }
1173: }
1174: rename($transname,$filename);
1175: return OK;
1176: }
1177: }
1178: }
1179: }
1180:
1181: # ------------------------------------------------ Get server side include body
1182: sub ssi_body {
1183: my ($filelink,%form)=@_;
1184: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1185: &ssi($filelink,%form));
1186: $output=~s/^.*\<body[^\>]*\>//si;
1187: $output=~s/\<\/body\s*\>.*$//si;
1188: $output=~
1189: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1190: return $output;
1191: }
1192:
1193: # --------------------------------------------------------- Server Side Include
1194:
1195: sub ssi {
1196:
1197: my ($fn,%form)=@_;
1198:
1199: my $ua=new LWP::UserAgent;
1200:
1201: my $request;
1202:
1203: if (%form) {
1204: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1205: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1206: } else {
1207: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1208: }
1209:
1210: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1211: my $response=$ua->request($request);
1212:
1213: return $response->content;
1214: }
1215:
1216: sub externalssi {
1217: my ($url)=@_;
1218: my $ua=new LWP::UserAgent;
1219: my $request=new HTTP::Request('GET',$url);
1220: my $response=$ua->request($request);
1221: return $response->content;
1222: }
1223:
1224: # ------- Add a token to a remote URI's query string to vouch for access rights
1225:
1226: sub tokenwrapper {
1227: my $uri=shift;
1228: $uri=~s/^http\:\/\/([^\/]+)//;
1229: $uri=~s/^\///;
1230: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
1231: my $token=$1;
1232: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
1233: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
1234: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
1235: (($uri=~/\?/)?'&':'?').'token='.$token.
1236: '&tokenissued='.$perlvar{'lonHostID'};
1237: } else {
1238: return '/adm/notfound.html';
1239: }
1240: }
1241:
1242: # --------------- Take an uploaded file and put it into the userfiles directory
1243: # input: name of form element, coursedoc=1 means this is for the course
1244: # output: url of file in userspace
1245:
1246: sub userfileupload {
1247: my ($formname,$coursedoc)=@_;
1248: my $fname=$ENV{'form.'.$formname.'.filename'};
1249: # Replace Windows backslashes by forward slashes
1250: $fname=~s/\\/\//g;
1251: # Get rid of everything but the actual filename
1252: $fname=~s/^.*\/([^\/]+)$/$1/;
1253: # Replace spaces by underscores
1254: $fname=~s/\s+/\_/g;
1255: # Replace all other weird characters by nothing
1256: $fname=~s/[^\w\.\-]//g;
1257: # See if there is anything left
1258: unless ($fname) { return 'error: no uploaded file'; }
1259: chop($ENV{'form.'.$formname});
1260: # Create the directory if not present
1261: my $docuname='';
1262: my $docudom='';
1263: my $docuhome='';
1264: if ($coursedoc) {
1265: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1266: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1267: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1268: } else {
1269: $docuname=$ENV{'user.name'};
1270: $docudom=$ENV{'user.domain'};
1271: $docuhome=$ENV{'user.home'};
1272: }
1273: return
1274: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1275: }
1276:
1277: sub finishuserfileupload {
1278: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1279: my $path=$docudom.'/'.$docuname.'/';
1280: my $filepath=$perlvar{'lonDocRoot'};
1281: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1282: my $count;
1283: for ($count=4;$count<=$#parts;$count++) {
1284: $filepath.="/$parts[$count]";
1285: if ((-e $filepath)!=1) {
1286: mkdir($filepath,0777);
1287: }
1288: }
1289: # Save the file
1290: {
1291: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
1292: print $fh $ENV{'form.'.$formname};
1293: }
1294: # Notify homeserver to grep it
1295: #
1296:
1297: my $fetchresult=
1298: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
1299: if ($fetchresult eq 'ok') {
1300: #
1301: # Return the URL to it
1302: return '/uploaded/'.$path.$fname;
1303: } else {
1304: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1305: ' to host '.$docuhome.': '.$fetchresult);
1306: return '/adm/notfound.html';
1307: }
1308: }
1309:
1310: # ------------------------------------------------------------------------- Log
1311:
1312: sub log {
1313: my ($dom,$nam,$hom,$what)=@_;
1314: return critical("log:$dom:$nam:$what",$hom);
1315: }
1316:
1317: # ------------------------------------------------------------------ Course Log
1318: #
1319: # This routine flushes several buffers of non-mission-critical nature
1320: #
1321:
1322: sub flushcourselogs {
1323: &logthis('Flushing log buffers');
1324: #
1325: # course logs
1326: # This is a log of all transactions in a course, which can be used
1327: # for data mining purposes
1328: #
1329: # It also collects the courseid database, which lists last transaction
1330: # times and course titles for all courseids
1331: #
1332: my %courseidbuffer=();
1333: foreach (keys %courselogs) {
1334: my $crsid=$_;
1335: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1336: &escape($courselogs{$crsid}),
1337: $coursehombuf{$crsid}) eq 'ok') {
1338: delete $courselogs{$crsid};
1339: } else {
1340: &logthis('Failed to flush log buffer for '.$crsid);
1341: if (length($courselogs{$crsid})>40000) {
1342: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1343: " exceeded maximum size, deleting.</font>");
1344: delete $courselogs{$crsid};
1345: }
1346: }
1347: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1348: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1349: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1350: } else {
1351: $courseidbuffer{$coursehombuf{$crsid}}=
1352: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1353: }
1354: }
1355: #
1356: # Write course id database (reverse lookup) to homeserver of courses
1357: # Is used in pickcourse
1358: #
1359: foreach (keys %courseidbuffer) {
1360: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1361: }
1362: #
1363: # File accesses
1364: # Writes to the dynamic metadata of resources to get hit counts, etc.
1365: #
1366: foreach (keys %accesshash) {
1367: my $entry=$_;
1368: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
1369: my %temphash=($entry => $accesshash{$entry});
1370: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
1371: delete $accesshash{$entry};
1372: }
1373: }
1374: #
1375: # Roles
1376: # Reverse lookup of user roles for course faculty/staff and co-authorship
1377: #
1378: foreach (keys %userrolehash) {
1379: my $entry=$_;
1380: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1381: split(/\:/,$entry);
1382: if (&Apache::lonnet::put('nohist_userroles',
1383: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1384: $rudom,$runame) eq 'ok') {
1385: delete $userrolehash{$entry};
1386: }
1387: }
1388: $dumpcount++;
1389: }
1390:
1391: sub courselog {
1392: my $what=shift;
1393: $what=time.':'.$what;
1394: unless ($ENV{'request.course.id'}) { return ''; }
1395: $coursedombuf{$ENV{'request.course.id'}}=
1396: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1397: $coursenumbuf{$ENV{'request.course.id'}}=
1398: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1399: $coursehombuf{$ENV{'request.course.id'}}=
1400: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1401: $coursedescrbuf{$ENV{'request.course.id'}}=
1402: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1403: if (defined $courselogs{$ENV{'request.course.id'}}) {
1404: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1405: } else {
1406: $courselogs{$ENV{'request.course.id'}}.=$what;
1407: }
1408: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1409: &flushcourselogs();
1410: }
1411: }
1412:
1413: sub courseacclog {
1414: my $fnsymb=shift;
1415: unless ($ENV{'request.course.id'}) { return ''; }
1416: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1417: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1418: $what.=':POST';
1419: foreach (keys %ENV) {
1420: if ($_=~/^form\.(.*)/) {
1421: $what.=':'.$1.'='.$ENV{$_};
1422: }
1423: }
1424: }
1425: &courselog($what);
1426: }
1427:
1428: sub countacc {
1429: my $url=&declutter(shift);
1430: unless ($ENV{'request.course.id'}) { return ''; }
1431: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1432: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1433: if (defined($accesshash{$key})) {
1434: $accesshash{$key}++;
1435: } else {
1436: $accesshash{$key}=1;
1437: }
1438: }
1439:
1440: sub linklog {
1441: my ($from,$to)=@_;
1442: $from=&declutter($from);
1443: $to=&declutter($to);
1444: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1445: $accesshash{$to.'___'.$from.'___goto'}=1;
1446: }
1447:
1448: sub userrolelog {
1449: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1450: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1451: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1452: ($trole=~/^cr/)) {
1453: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1454: $userrolehash
1455: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1456: =$tend.':'.$tstart;
1457: }
1458: }
1459:
1460: sub get_course_adv_roles {
1461: my $cid=shift;
1462: $cid=$ENV{'request.course.id'} unless (defined($cid));
1463: my %coursehash=&coursedescription($cid);
1464: my %returnhash=();
1465: my %dumphash=
1466: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1467: my $now=time;
1468: foreach (keys %dumphash) {
1469: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1470: if (($tstart) && ($tstart<0)) { next; }
1471: if (($tend) && ($tend<$now)) { next; }
1472: if (($tstart) && ($now<$tstart)) { next; }
1473: my ($role,$username,$domain,$section)=split(/\:/,$_);
1474: my $key=&plaintext($role);
1475: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1476: if ($returnhash{$key}) {
1477: $returnhash{$key}.=','.$username.':'.$domain;
1478: } else {
1479: $returnhash{$key}=$username.':'.$domain;
1480: }
1481: }
1482: return %returnhash;
1483: }
1484:
1485: sub get_my_roles {
1486: my ($uname,$udom)=@_;
1487: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1488: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1489: my %dumphash=
1490: &dump('nohist_userroles',$udom,$uname);
1491: my %returnhash=();
1492: my $now=time;
1493: foreach (keys %dumphash) {
1494: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1495: if (($tstart) && ($tstart<0)) { next; }
1496: if (($tend) && ($tend<$now)) { next; }
1497: if (($tstart) && ($now<$tstart)) { next; }
1498: my ($role,$username,$domain,$section)=split(/\:/,$_);
1499: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1500: }
1501: return %returnhash;
1502: }
1503:
1504: # ----------------------------------------------------- Frontpage Announcements
1505: #
1506: #
1507:
1508: sub postannounce {
1509: my ($server,$text)=@_;
1510: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1511: unless ($text=~/\w/) { $text=''; }
1512: return &reply('setannounce:'.&escape($text),$server);
1513: }
1514:
1515: sub getannounce {
1516: if (my $fh=Apache::File->new($perlvar{'lonDocRoot'}.'/announcement.txt')) {
1517: my $announcement='';
1518: while (<$fh>) { $announcement .=$_; }
1519: $fh->close();
1520: if ($announcement=~/\w/) {
1521: return
1522: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1523: '<tr><td bgcolor="#FFFFFF"><pre>'.$announcement.'</pre></td></tr></table>';
1524: } else {
1525: return '';
1526: }
1527: } else {
1528: return '';
1529: }
1530: }
1531:
1532: # ---------------------------------------------------------- Course ID routines
1533: # Deal with domain's nohist_courseid.db files
1534: #
1535:
1536: sub courseidput {
1537: my ($domain,$what,$coursehome)=@_;
1538: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1539: }
1540:
1541: sub courseiddump {
1542: my ($domfilter,$descfilter,$sincefilter)=@_;
1543: my %returnhash=();
1544: unless ($domfilter) { $domfilter=''; }
1545: foreach my $tryserver (keys %libserv) {
1546: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1547: foreach (
1548: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1549: $sincefilter.':'.&escape($descfilter),
1550: $tryserver))) {
1551: my ($key,$value)=split(/\=/,$_);
1552: if (($key) && ($value)) {
1553: $returnhash{&unescape($key)}=&unescape($value);
1554: }
1555: }
1556:
1557: }
1558: }
1559: return %returnhash;
1560: }
1561:
1562: #
1563: # ----------------------------------------------------------- Check out an item
1564:
1565: sub checkout {
1566: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1567: my $now=time;
1568: my $lonhost=$perlvar{'lonHostID'};
1569: my $infostr=&escape(
1570: 'CHECKOUTTOKEN&'.
1571: $tuname.'&'.
1572: $tudom.'&'.
1573: $tcrsid.'&'.
1574: $symb.'&'.
1575: $now.'&'.$ENV{'REMOTE_ADDR'});
1576: my $token=&reply('tmpput:'.$infostr,$lonhost);
1577: if ($token=~/^error\:/) {
1578: &logthis("<font color=blue>WARNING: ".
1579: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1580: "</font>");
1581: return '';
1582: }
1583:
1584: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1585: $token=~tr/a-z/A-Z/;
1586:
1587: my %infohash=('resource.0.outtoken' => $token,
1588: 'resource.0.checkouttime' => $now,
1589: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1590:
1591: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1592: return '';
1593: } else {
1594: &logthis("<font color=blue>WARNING: ".
1595: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1596: "</font>");
1597: }
1598:
1599: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1600: &escape('Checkout '.$infostr.' - '.
1601: $token)) ne 'ok') {
1602: return '';
1603: } else {
1604: &logthis("<font color=blue>WARNING: ".
1605: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1606: "</font>");
1607: }
1608: return $token;
1609: }
1610:
1611: # ------------------------------------------------------------ Check in an item
1612:
1613: sub checkin {
1614: my $token=shift;
1615: my $now=time;
1616: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1617: $lonhost=~tr/A-Z/a-z/;
1618: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1619: $dtoken=~s/\W/\_/g;
1620: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1621: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1622:
1623: unless (($tuname) && ($tudom)) {
1624: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1625: return '';
1626: }
1627:
1628: unless (&allowed('mgr',$tcrsid)) {
1629: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1630: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1631: return '';
1632: }
1633:
1634: my %infohash=('resource.0.intoken' => $token,
1635: 'resource.0.checkintime' => $now,
1636: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1637:
1638: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1639: return '';
1640: }
1641:
1642: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1643: &escape('Checkin - '.$token)) ne 'ok') {
1644: return '';
1645: }
1646:
1647: return ($symb,$tuname,$tudom,$tcrsid);
1648: }
1649:
1650: # --------------------------------------------- Set Expire Date for Spreadsheet
1651:
1652: sub expirespread {
1653: my ($uname,$udom,$stype,$usymb)=@_;
1654: my $cid=$ENV{'request.course.id'};
1655: if ($cid) {
1656: my $now=time;
1657: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1658: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1659: $ENV{'course.'.$cid.'.num'}.
1660: ':nohist_expirationdates:'.
1661: &escape($key).'='.$now,
1662: $ENV{'course.'.$cid.'.home'})
1663: }
1664: return 'ok';
1665: }
1666:
1667: # ----------------------------------------------------- Devalidate Spreadsheets
1668:
1669: sub devalidate {
1670: my ($symb,$uname,$udom)=@_;
1671: my $cid=$ENV{'request.course.id'};
1672: if ($cid) {
1673: # delete the stored spreadsheets for
1674: # - the student level sheet of this user in course's homespace
1675: # - the assessment level sheet for this resource
1676: # for this user in user's homespace
1677: my $key=$uname.':'.$udom.':';
1678: my $status=
1679: &del('nohist_calculatedsheets',
1680: [$key.'studentcalc:'],
1681: $ENV{'course.'.$cid.'.domain'},
1682: $ENV{'course.'.$cid.'.num'})
1683: .' '.
1684: &del('nohist_calculatedsheets_'.$cid,
1685: [$key.'assesscalc:'.$symb],$udom,$uname);
1686: unless ($status eq 'ok ok') {
1687: &logthis('Could not devalidate spreadsheet '.
1688: $uname.' at '.$udom.' for '.
1689: $symb.': '.$status);
1690: }
1691: }
1692: }
1693:
1694: sub get_scalar {
1695: my ($string,$end) = @_;
1696: my $value;
1697: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1698: $value = $1;
1699: } elsif ($$string =~ s/^([^&]*?)&//) {
1700: $value = $1;
1701: }
1702: return &unescape($value);
1703: }
1704:
1705: sub array2str {
1706: my (@array) = @_;
1707: my $result=&arrayref2str(\@array);
1708: $result=~s/^__ARRAY_REF__//;
1709: $result=~s/__END_ARRAY_REF__$//;
1710: return $result;
1711: }
1712:
1713: sub arrayref2str {
1714: my ($arrayref) = @_;
1715: my $result='__ARRAY_REF__';
1716: foreach my $elem (@$arrayref) {
1717: if(ref($elem) eq 'ARRAY') {
1718: $result.=&arrayref2str($elem).'&';
1719: } elsif(ref($elem) eq 'HASH') {
1720: $result.=&hashref2str($elem).'&';
1721: } elsif(ref($elem)) {
1722: #print("Got a ref of ".(ref($elem))." skipping.");
1723: } else {
1724: $result.=&escape($elem).'&';
1725: }
1726: }
1727: $result=~s/\&$//;
1728: $result .= '__END_ARRAY_REF__';
1729: return $result;
1730: }
1731:
1732: sub hash2str {
1733: my (%hash) = @_;
1734: my $result=&hashref2str(\%hash);
1735: $result=~s/^__HASH_REF__//;
1736: $result=~s/__END_HASH_REF__$//;
1737: return $result;
1738: }
1739:
1740: sub hashref2str {
1741: my ($hashref)=@_;
1742: my $result='__HASH_REF__';
1743: foreach (keys(%$hashref)) {
1744: if (ref($_) eq 'ARRAY') {
1745: $result.=&arrayref2str($_).'=';
1746: } elsif (ref($_) eq 'HASH') {
1747: $result.=&hashref2str($_).'=';
1748: } elsif (ref($_)) {
1749: $result.='=';
1750: #print("Got a ref of ".(ref($_))." skipping.");
1751: } else {
1752: if ($_) {$result.=&escape($_).'=';} else { last; }
1753: }
1754:
1755: if(ref($hashref->{$_}) eq 'ARRAY') {
1756: $result.=&arrayref2str($hashref->{$_}).'&';
1757: } elsif(ref($hashref->{$_}) eq 'HASH') {
1758: $result.=&hashref2str($hashref->{$_}).'&';
1759: } elsif(ref($hashref->{$_})) {
1760: $result.='&';
1761: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1762: } else {
1763: $result.=&escape($hashref->{$_}).'&';
1764: }
1765: }
1766: $result=~s/\&$//;
1767: $result .= '__END_HASH_REF__';
1768: return $result;
1769: }
1770:
1771: sub str2hash {
1772: my ($string)=@_;
1773: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1774: return %$hash;
1775: }
1776:
1777: sub str2hashref {
1778: my ($string) = @_;
1779:
1780: my %hash;
1781:
1782: if($string !~ /^__HASH_REF__/) {
1783: if (! ($string eq '' || !defined($string))) {
1784: $hash{'error'}='Not hash reference';
1785: }
1786: return (\%hash, $string);
1787: }
1788:
1789: $string =~ s/^__HASH_REF__//;
1790:
1791: while($string !~ /^__END_HASH_REF__/) {
1792: #key
1793: my $key='';
1794: if($string =~ /^__HASH_REF__/) {
1795: ($key, $string)=&str2hashref($string);
1796: if(defined($key->{'error'})) {
1797: $hash{'error'}='Bad data';
1798: return (\%hash, $string);
1799: }
1800: } elsif($string =~ /^__ARRAY_REF__/) {
1801: ($key, $string)=&str2arrayref($string);
1802: if($key->[0] eq 'Array reference error') {
1803: $hash{'error'}='Bad data';
1804: return (\%hash, $string);
1805: }
1806: } else {
1807: $string =~ s/^(.*?)=//;
1808: $key=&unescape($1);
1809: }
1810: $string =~ s/^=//;
1811:
1812: #value
1813: my $value='';
1814: if($string =~ /^__HASH_REF__/) {
1815: ($value, $string)=&str2hashref($string);
1816: if(defined($value->{'error'})) {
1817: $hash{'error'}='Bad data';
1818: return (\%hash, $string);
1819: }
1820: } elsif($string =~ /^__ARRAY_REF__/) {
1821: ($value, $string)=&str2arrayref($string);
1822: if($value->[0] eq 'Array reference error') {
1823: $hash{'error'}='Bad data';
1824: return (\%hash, $string);
1825: }
1826: } else {
1827: $value=&get_scalar(\$string,'__END_HASH_REF__');
1828: }
1829: $string =~ s/^&//;
1830:
1831: $hash{$key}=$value;
1832: }
1833:
1834: $string =~ s/^__END_HASH_REF__//;
1835:
1836: return (\%hash, $string);
1837: }
1838:
1839: sub str2array {
1840: my ($string)=@_;
1841: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1842: return @$array;
1843: }
1844:
1845: sub str2arrayref {
1846: my ($string) = @_;
1847: my @array;
1848:
1849: if($string !~ /^__ARRAY_REF__/) {
1850: if (! ($string eq '' || !defined($string))) {
1851: $array[0]='Array reference error';
1852: }
1853: return (\@array, $string);
1854: }
1855:
1856: $string =~ s/^__ARRAY_REF__//;
1857:
1858: while($string !~ /^__END_ARRAY_REF__/) {
1859: my $value='';
1860: if($string =~ /^__HASH_REF__/) {
1861: ($value, $string)=&str2hashref($string);
1862: if(defined($value->{'error'})) {
1863: $array[0] ='Array reference error';
1864: return (\@array, $string);
1865: }
1866: } elsif($string =~ /^__ARRAY_REF__/) {
1867: ($value, $string)=&str2arrayref($string);
1868: if($value->[0] eq 'Array reference error') {
1869: $array[0] ='Array reference error';
1870: return (\@array, $string);
1871: }
1872: } else {
1873: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1874: }
1875: $string =~ s/^&//;
1876:
1877: push(@array, $value);
1878: }
1879:
1880: $string =~ s/^__END_ARRAY_REF__//;
1881:
1882: return (\@array, $string);
1883: }
1884:
1885: # -------------------------------------------------------------------Temp Store
1886:
1887: sub tmpreset {
1888: my ($symb,$namespace,$domain,$stuname) = @_;
1889: if (!$symb) {
1890: $symb=&symbread();
1891: if (!$symb) { $symb= $ENV{'request.url'}; }
1892: }
1893: $symb=escape($symb);
1894:
1895: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1896: $namespace=~s/\//\_/g;
1897: $namespace=~s/\W//g;
1898:
1899: #FIXME needs to do something for /pub resources
1900: if (!$domain) { $domain=$ENV{'user.domain'}; }
1901: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1902: my $path=$perlvar{'lonDaemons'}.'/tmp';
1903: my %hash;
1904: if (tie(%hash,'GDBM_File',
1905: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1906: &GDBM_WRCREAT(),0640)) {
1907: foreach my $key (keys %hash) {
1908: if ($key=~ /:$symb/) {
1909: delete($hash{$key});
1910: }
1911: }
1912: }
1913: }
1914:
1915: sub tmpstore {
1916: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1917:
1918: if (!$symb) {
1919: $symb=&symbread();
1920: if (!$symb) { $symb= $ENV{'request.url'}; }
1921: }
1922: $symb=escape($symb);
1923:
1924: if (!$namespace) {
1925: # I don't think we would ever want to store this for a course.
1926: # it seems this will only be used if we don't have a course.
1927: #$namespace=$ENV{'request.course.id'};
1928: #if (!$namespace) {
1929: $namespace=$ENV{'request.state'};
1930: #}
1931: }
1932: $namespace=~s/\//\_/g;
1933: $namespace=~s/\W//g;
1934: #FIXME needs to do something for /pub resources
1935: if (!$domain) { $domain=$ENV{'user.domain'}; }
1936: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1937: my $now=time;
1938: my %hash;
1939: my $path=$perlvar{'lonDaemons'}.'/tmp';
1940: if (tie(%hash,'GDBM_File',
1941: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1942: &GDBM_WRCREAT(),0640)) {
1943: $hash{"version:$symb"}++;
1944: my $version=$hash{"version:$symb"};
1945: my $allkeys='';
1946: foreach my $key (keys(%$storehash)) {
1947: $allkeys.=$key.':';
1948: $hash{"$version:$symb:$key"}=$$storehash{$key};
1949: }
1950: $hash{"$version:$symb:timestamp"}=$now;
1951: $allkeys.='timestamp';
1952: $hash{"$version:keys:$symb"}=$allkeys;
1953: if (untie(%hash)) {
1954: return 'ok';
1955: } else {
1956: return "error:$!";
1957: }
1958: } else {
1959: return "error:$!";
1960: }
1961: }
1962:
1963: # -----------------------------------------------------------------Temp Restore
1964:
1965: sub tmprestore {
1966: my ($symb,$namespace,$domain,$stuname) = @_;
1967:
1968: if (!$symb) {
1969: $symb=&symbread();
1970: if (!$symb) { $symb= $ENV{'request.url'}; }
1971: }
1972: $symb=escape($symb);
1973:
1974: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1975: #FIXME needs to do something for /pub resources
1976: if (!$domain) { $domain=$ENV{'user.domain'}; }
1977: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1978:
1979: my %returnhash;
1980: $namespace=~s/\//\_/g;
1981: $namespace=~s/\W//g;
1982: my %hash;
1983: my $path=$perlvar{'lonDaemons'}.'/tmp';
1984: if (tie(%hash,'GDBM_File',
1985: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1986: &GDBM_READER(),0640)) {
1987: my $version=$hash{"version:$symb"};
1988: $returnhash{'version'}=$version;
1989: my $scope;
1990: for ($scope=1;$scope<=$version;$scope++) {
1991: my $vkeys=$hash{"$scope:keys:$symb"};
1992: my @keys=split(/:/,$vkeys);
1993: my $key;
1994: $returnhash{"$scope:keys"}=$vkeys;
1995: foreach $key (@keys) {
1996: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1997: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1998: }
1999: }
2000: if (!(untie(%hash))) {
2001: return "error:$!";
2002: }
2003: } else {
2004: return "error:$!";
2005: }
2006: return %returnhash;
2007: }
2008:
2009: # ----------------------------------------------------------------------- Store
2010:
2011: sub store {
2012: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2013: my $home='';
2014:
2015: if ($stuname) { $home=&homeserver($stuname,$domain); }
2016:
2017: $symb=&symbclean($symb);
2018: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2019:
2020: if (!$domain) { $domain=$ENV{'user.domain'}; }
2021: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2022:
2023: &devalidate($symb,$stuname,$domain);
2024:
2025: $symb=escape($symb);
2026: if (!$namespace) {
2027: unless ($namespace=$ENV{'request.course.id'}) {
2028: return '';
2029: }
2030: }
2031: if (!$home) { $home=$ENV{'user.home'}; }
2032: my $namevalue='';
2033: foreach (keys %$storehash) {
2034: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2035: }
2036: $namevalue=~s/\&$//;
2037: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2038: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2039: }
2040:
2041: # -------------------------------------------------------------- Critical Store
2042:
2043: sub cstore {
2044: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2045: my $home='';
2046:
2047: if ($stuname) { $home=&homeserver($stuname,$domain); }
2048:
2049: $symb=&symbclean($symb);
2050: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2051:
2052: if (!$domain) { $domain=$ENV{'user.domain'}; }
2053: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2054:
2055: &devalidate($symb,$stuname,$domain);
2056:
2057: $symb=escape($symb);
2058: if (!$namespace) {
2059: unless ($namespace=$ENV{'request.course.id'}) {
2060: return '';
2061: }
2062: }
2063: if (!$home) { $home=$ENV{'user.home'}; }
2064:
2065: my $namevalue='';
2066: foreach (keys %$storehash) {
2067: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2068: }
2069: $namevalue=~s/\&$//;
2070: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2071: return critical
2072: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2073: }
2074:
2075: # --------------------------------------------------------------------- Restore
2076:
2077: sub restore {
2078: my ($symb,$namespace,$domain,$stuname) = @_;
2079: my $home='';
2080:
2081: if ($stuname) { $home=&homeserver($stuname,$domain); }
2082:
2083: if (!$symb) {
2084: unless ($symb=escape(&symbread())) { return ''; }
2085: } else {
2086: $symb=&escape(&symbclean($symb));
2087: }
2088: if (!$namespace) {
2089: unless ($namespace=$ENV{'request.course.id'}) {
2090: return '';
2091: }
2092: }
2093: if (!$domain) { $domain=$ENV{'user.domain'}; }
2094: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2095: if (!$home) { $home=$ENV{'user.home'}; }
2096: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2097:
2098: my %returnhash=();
2099: foreach (split(/\&/,$answer)) {
2100: my ($name,$value)=split(/\=/,$_);
2101: $returnhash{&unescape($name)}=&unescape($value);
2102: }
2103: my $version;
2104: for ($version=1;$version<=$returnhash{'version'};$version++) {
2105: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2106: $returnhash{$_}=$returnhash{$version.':'.$_};
2107: }
2108: }
2109: return %returnhash;
2110: }
2111:
2112: # ---------------------------------------------------------- Course Description
2113:
2114: sub coursedescription {
2115: my $courseid=shift;
2116: $courseid=~s/^\///;
2117: $courseid=~s/\_/\//g;
2118: my ($cdomain,$cnum)=split(/\//,$courseid);
2119: my $chome=&homeserver($cnum,$cdomain);
2120: my $normalid=$cdomain.'_'.$cnum;
2121: # need to always cache even if we get errors otherwise we keep
2122: # trying and trying and trying to get the course description.
2123: my %envhash=();
2124: my %returnhash=();
2125: $envhash{'course.'.$normalid.'.last_cache'}=time;
2126: if ($chome ne 'no_host') {
2127: %returnhash=&dump('environment',$cdomain,$cnum);
2128: if (!exists($returnhash{'con_lost'})) {
2129: $returnhash{'home'}= $chome;
2130: $returnhash{'domain'} = $cdomain;
2131: $returnhash{'num'} = $cnum;
2132: while (my ($name,$value) = each %returnhash) {
2133: $envhash{'course.'.$normalid.'.'.$name}=$value;
2134: }
2135: $returnhash{'url'}=&clutter($returnhash{'url'});
2136: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2137: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2138: $envhash{'course.'.$normalid.'.home'}=$chome;
2139: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2140: $envhash{'course.'.$normalid.'.num'}=$cnum;
2141: }
2142: }
2143: &appenv(%envhash);
2144: return %returnhash;
2145: }
2146:
2147: # -------------------------------------------------------- Get user privileges
2148:
2149: sub rolesinit {
2150: my ($domain,$username,$authhost)=@_;
2151: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2152: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2153: my %allroles=();
2154: my %thesepriv=();
2155: my $now=time;
2156: my $userroles="user.login.time=$now\n";
2157: my $thesestr;
2158:
2159: if ($rolesdump ne '') {
2160: foreach (split(/&/,$rolesdump)) {
2161: if ($_!~/^rolesdef\&/) {
2162: my ($area,$role)=split(/=/,$_);
2163: $area=~s/\_\w\w$//;
2164: my ($trole,$tend,$tstart)=split(/_/,$role);
2165: $userroles.='user.role.'.$trole.'.'.$area.'='.
2166: $tstart.'.'.$tend."\n";
2167: # log the associated role with the area
2168: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2169: if ($tend!=0) {
2170: if ($tend<$now) {
2171: $trole='';
2172: }
2173: }
2174: if ($tstart!=0) {
2175: if ($tstart>$now) {
2176: $trole='';
2177: }
2178: }
2179: if (($area ne '') && ($trole ne '')) {
2180: my $spec=$trole.'.'.$area;
2181: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2182: if ($trole =~ /^cr\//) {
2183: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2184: my $homsvr=homeserver($rauthor,$rdomain);
2185: if ($hostname{$homsvr} ne '') {
2186: my ($rdummy,$roledef)=
2187: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2188:
2189: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2190: my ($syspriv,$dompriv,$coursepriv)=
2191: split(/\_/,$roledef);
2192: if (defined($syspriv)) {
2193: $allroles{'cm./'}.=':'.$syspriv;
2194: $allroles{$spec.'./'}.=':'.$syspriv;
2195: }
2196: if ($tdomain ne '') {
2197: if (defined($dompriv)) {
2198: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2199: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2200: }
2201: if ($trest ne '') {
2202: if (defined($coursepriv)) {
2203: $allroles{'cm.'.$area}.=':'.$coursepriv;
2204: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
2205: }
2206: }
2207: }
2208: }
2209: }
2210: } else {
2211: if (defined($pr{$trole.':s'})) {
2212: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
2213: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2214: }
2215: if ($tdomain ne '') {
2216: if (defined($pr{$trole.':d'})) {
2217: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2218: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2219: }
2220: if ($trest ne '') {
2221: if (defined($pr{$trole.':c'})) {
2222: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2223: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2224: }
2225: }
2226: }
2227: }
2228: }
2229: }
2230: }
2231: my $adv=0;
2232: my $author=0;
2233: foreach (keys %allroles) {
2234: %thesepriv=();
2235: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
2236: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2237: foreach (split(/:/,$allroles{$_})) {
2238: if ($_ ne '') {
2239: my ($privilege,$restrictions)=split(/&/,$_);
2240: if ($restrictions eq '') {
2241: $thesepriv{$privilege}='F';
2242: } else {
2243: if ($thesepriv{$privilege} ne 'F') {
2244: $thesepriv{$privilege}.=$restrictions;
2245: }
2246: }
2247: }
2248: }
2249: $thesestr='';
2250: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2251: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
2252: }
2253: $userroles.='user.adv='.$adv."\n".
2254: 'user.author='.$author."\n";
2255: $ENV{'user.adv'}=$adv;
2256: }
2257: return $userroles;
2258: }
2259:
2260: # --------------------------------------------------------------- get interface
2261:
2262: sub get {
2263: my ($namespace,$storearr,$udomain,$uname)=@_;
2264: my $items='';
2265: foreach (@$storearr) {
2266: $items.=escape($_).'&';
2267: }
2268: $items=~s/\&$//;
2269: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2270: if (!$uname) { $uname=$ENV{'user.name'}; }
2271: my $uhome=&homeserver($uname,$udomain);
2272:
2273: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2274: my @pairs=split(/\&/,$rep);
2275: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2276: return @pairs;
2277: }
2278: my %returnhash=();
2279: my $i=0;
2280: foreach (@$storearr) {
2281: $returnhash{$_}=unescape($pairs[$i]);
2282: $i++;
2283: }
2284: return %returnhash;
2285: }
2286:
2287: # --------------------------------------------------------------- del interface
2288:
2289: sub del {
2290: my ($namespace,$storearr,$udomain,$uname)=@_;
2291: my $items='';
2292: foreach (@$storearr) {
2293: $items.=escape($_).'&';
2294: }
2295: $items=~s/\&$//;
2296: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2297: if (!$uname) { $uname=$ENV{'user.name'}; }
2298: my $uhome=&homeserver($uname,$udomain);
2299:
2300: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2301: }
2302:
2303: # -------------------------------------------------------------- dump interface
2304:
2305: sub dump {
2306: my ($namespace,$udomain,$uname,$regexp)=@_;
2307: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2308: if (!$uname) { $uname=$ENV{'user.name'}; }
2309: my $uhome=&homeserver($uname,$udomain);
2310: if ($regexp) {
2311: $regexp=&escape($regexp);
2312: } else {
2313: $regexp='.';
2314: }
2315: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2316: my @pairs=split(/\&/,$rep);
2317: my %returnhash=();
2318: foreach (@pairs) {
2319: my ($key,$value)=split(/=/,$_);
2320: $returnhash{unescape($key)}=unescape($value);
2321: }
2322: return %returnhash;
2323: }
2324:
2325: # -------------------------------------------------------------- keys interface
2326:
2327: sub getkeys {
2328: my ($namespace,$udomain,$uname)=@_;
2329: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2330: if (!$uname) { $uname=$ENV{'user.name'}; }
2331: my $uhome=&homeserver($uname,$udomain);
2332: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2333: my @keyarray=();
2334: foreach (split(/\&/,$rep)) {
2335: push (@keyarray,&unescape($_));
2336: }
2337: return @keyarray;
2338: }
2339:
2340: # --------------------------------------------------------------- currentdump
2341: sub currentdump {
2342: my ($courseid,$sdom,$sname)=@_;
2343: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2344: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2345: $sname = $ENV{'user.name'} if (! defined($sname));
2346: my $uhome = &homeserver($sname,$sdom);
2347: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2348: return if ($rep =~ /^(error:|no_such_host)/);
2349: #
2350: my %returnhash=();
2351: #
2352: if ($rep eq "unknown_cmd") {
2353: # an old lond will not know currentdump
2354: # Do a dump and make it look like a currentdump
2355: my @tmp = &dump($courseid,$sdom,$sname,'.');
2356: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2357: my %hash = @tmp;
2358: @tmp=();
2359: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2360: } else {
2361: my @pairs=split(/\&/,$rep);
2362: foreach (@pairs) {
2363: my ($key,$value)=split(/=/,$_);
2364: my ($symb,$param) = split(/:/,$key);
2365: $returnhash{&unescape($symb)}->{&unescape($param)} =
2366: &unescape($value);
2367: }
2368: }
2369: return %returnhash;
2370: }
2371:
2372: sub convert_dump_to_currentdump{
2373: my %hash = %{shift()};
2374: my %returnhash;
2375: # Code ripped from lond, essentially. The only difference
2376: # here is the unescaping done by lonnet::dump(). Conceivably
2377: # we might run in to problems with parameter names =~ /^v\./
2378: while (my ($key,$value) = each(%hash)) {
2379: my ($v,$symb,$param) = split(/:/,$key);
2380: next if ($v eq 'version' || $symb eq 'keys');
2381: next if (exists($returnhash{$symb}) &&
2382: exists($returnhash{$symb}->{$param}) &&
2383: $returnhash{$symb}->{'v.'.$param} > $v);
2384: $returnhash{$symb}->{$param}=$value;
2385: $returnhash{$symb}->{'v.'.$param}=$v;
2386: }
2387: #
2388: # Remove all of the keys in the hashes which keep track of
2389: # the version of the parameter.
2390: while (my ($symb,$param_hash) = each(%returnhash)) {
2391: # use a foreach because we are going to delete from the hash.
2392: foreach my $key (keys(%$param_hash)) {
2393: delete($param_hash->{$key}) if ($key =~ /^v\./);
2394: }
2395: }
2396: return \%returnhash;
2397: }
2398:
2399: # --------------------------------------------------------------- put interface
2400:
2401: sub put {
2402: my ($namespace,$storehash,$udomain,$uname)=@_;
2403: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2404: if (!$uname) { $uname=$ENV{'user.name'}; }
2405: my $uhome=&homeserver($uname,$udomain);
2406: my $items='';
2407: foreach (keys %$storehash) {
2408: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
2409: }
2410: $items=~s/\&$//;
2411: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2412: }
2413:
2414: # ------------------------------------------------------ critical put interface
2415:
2416: sub cput {
2417: my ($namespace,$storehash,$udomain,$uname)=@_;
2418: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2419: if (!$uname) { $uname=$ENV{'user.name'}; }
2420: my $uhome=&homeserver($uname,$udomain);
2421: my $items='';
2422: foreach (keys %$storehash) {
2423: $items.=escape($_).'='.escape($$storehash{$_}).'&';
2424: }
2425: $items=~s/\&$//;
2426: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2427: }
2428:
2429: # -------------------------------------------------------------- eget interface
2430:
2431: sub eget {
2432: my ($namespace,$storearr,$udomain,$uname)=@_;
2433: my $items='';
2434: foreach (@$storearr) {
2435: $items.=escape($_).'&';
2436: }
2437: $items=~s/\&$//;
2438: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2439: if (!$uname) { $uname=$ENV{'user.name'}; }
2440: my $uhome=&homeserver($uname,$udomain);
2441: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2442: my @pairs=split(/\&/,$rep);
2443: my %returnhash=();
2444: my $i=0;
2445: foreach (@$storearr) {
2446: $returnhash{$_}=unescape($pairs[$i]);
2447: $i++;
2448: }
2449: return %returnhash;
2450: }
2451:
2452: # ---------------------------------------------- Custom access rule evaluation
2453:
2454: sub customaccess {
2455: my ($priv,$uri)=@_;
2456: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2457: $urealm=~s/^\W//;
2458: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2459: my $access=0;
2460: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2461: my ($effect,$realm,$role)=split(/\:/,$_);
2462: if ($role) {
2463: if ($role ne $urole) { next; }
2464: }
2465: foreach (split(/\s*\,\s*/,$realm)) {
2466: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2467: if ($tdom) {
2468: if ($tdom ne $udom) { next; }
2469: }
2470: if ($tcrs) {
2471: if ($tcrs ne $ucrs) { next; }
2472: }
2473: if ($tsec) {
2474: if ($tsec ne $usec) { next; }
2475: }
2476: $access=($effect eq 'allow');
2477: last;
2478: }
2479: if ($realm eq '' && $role eq '') {
2480: $access=($effect eq 'allow');
2481: }
2482: }
2483: return $access;
2484: }
2485:
2486: # ------------------------------------------------- Check for a user privilege
2487:
2488: sub allowed {
2489: my ($priv,$uri)=@_;
2490:
2491: my $orguri=$uri;
2492: $uri=&declutter($uri);
2493:
2494: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2495: # Free bre access to adm and meta resources
2496:
2497: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2498: return 'F';
2499: }
2500:
2501: # Free bre to public access
2502:
2503: if ($priv eq 'bre') {
2504: my $copyright=&metadata($uri,'copyright');
2505: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2506: return 'F';
2507: }
2508: if ($copyright eq 'priv') {
2509: $uri=~/([^\/]+)\/([^\/]+)\//;
2510: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2511: return '';
2512: }
2513: }
2514: if ($copyright eq 'domain') {
2515: $uri=~/([^\/]+)\/([^\/]+)\//;
2516: unless (($ENV{'user.domain'} eq $1) ||
2517: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2518: return '';
2519: }
2520: }
2521: if ($ENV{'request.role'}=~ /li\.\//) {
2522: # Library role, so allow browsing of resources in this domain.
2523: return 'F';
2524: }
2525: if ($copyright eq 'custom') {
2526: unless (&customaccess($priv,$uri)) { return ''; }
2527: }
2528: }
2529: # Domain coordinator is trying to create a course
2530: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2531: # uri is the requested domain in this case.
2532: # comparison to 'request.role.domain' shows if the user has selected
2533: # a role of dc for the domain in question.
2534: return 'F' if ($uri eq $ENV{'request.role.domain'});
2535: }
2536:
2537: my $thisallowed='';
2538: my $statecond=0;
2539: my $courseprivid='';
2540:
2541: # Course
2542:
2543: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2544: $thisallowed.=$1;
2545: }
2546:
2547: # Domain
2548:
2549: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2550: =~/$priv\&([^\:]*)/) {
2551: $thisallowed.=$1;
2552: }
2553:
2554: # Course: uri itself is a course
2555: my $courseuri=$uri;
2556: $courseuri=~s/\_(\d)/\/$1/;
2557: $courseuri=~s/^([^\/])/\/$1/;
2558:
2559: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2560: =~/$priv\&([^\:]*)/) {
2561: $thisallowed.=$1;
2562: }
2563:
2564: # URI is an uploaded document for this course
2565:
2566: if (($priv eq 'bre') &&
2567: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2568: return 'F';
2569: }
2570: # Full access at system, domain or course-wide level? Exit.
2571:
2572: if ($thisallowed=~/F/) {
2573: return 'F';
2574: }
2575:
2576: # If this is generating or modifying users, exit with special codes
2577:
2578: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
2579: return $thisallowed;
2580: }
2581: #
2582: # Gathered so far: system, domain and course wide privileges
2583: #
2584: # Course: See if uri or referer is an individual resource that is part of
2585: # the course
2586:
2587: if ($ENV{'request.course.id'}) {
2588:
2589: $courseprivid=$ENV{'request.course.id'};
2590: if ($ENV{'request.course.sec'}) {
2591: $courseprivid.='/'.$ENV{'request.course.sec'};
2592: }
2593: $courseprivid=~s/\_/\//;
2594: my $checkreferer=1;
2595: my ($match,$cond)=&is_on_map($uri);
2596: if ($match) {
2597: $statecond=$cond;
2598: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2599: =~/$priv\&([^\:]*)/) {
2600: $thisallowed.=$1;
2601: $checkreferer=0;
2602: }
2603: }
2604:
2605: if ($checkreferer) {
2606: my $refuri=$ENV{'httpref.'.$orguri};
2607: unless ($refuri) {
2608: foreach (keys %ENV) {
2609: if ($_=~/^httpref\..*\*/) {
2610: my $pattern=$_;
2611: $pattern=~s/^httpref\.\/res\///;
2612: $pattern=~s/\*/\[\^\/\]\+/g;
2613: $pattern=~s/\//\\\//g;
2614: if ($orguri=~/$pattern/) {
2615: $refuri=$ENV{$_};
2616: }
2617: }
2618: }
2619: }
2620:
2621: if ($refuri) {
2622: $refuri=&declutter($refuri);
2623: my ($match,$cond)=&is_on_map($refuri);
2624: if ($match) {
2625: my $refstatecond=$cond;
2626: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2627: =~/$priv\&([^\:]*)/) {
2628: $thisallowed.=$1;
2629: $uri=$refuri;
2630: $statecond=$refstatecond;
2631: }
2632: }
2633: }
2634: }
2635: }
2636:
2637: #
2638: # Gathered now: all privileges that could apply, and condition number
2639: #
2640: #
2641: # Full or no access?
2642: #
2643:
2644: if ($thisallowed=~/F/) {
2645: return 'F';
2646: }
2647:
2648: unless ($thisallowed) {
2649: return '';
2650: }
2651:
2652: # Restrictions exist, deal with them
2653: #
2654: # C:according to course preferences
2655: # R:according to resource settings
2656: # L:unless locked
2657: # X:according to user session state
2658: #
2659:
2660: # Possibly locked functionality, check all courses
2661: # Locks might take effect only after 10 minutes cache expiration for other
2662: # courses, and 2 minutes for current course
2663:
2664: my $envkey;
2665: if ($thisallowed=~/L/) {
2666: foreach $envkey (keys %ENV) {
2667: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2668: my $courseid=$2;
2669: my $roleid=$1.'.'.$2;
2670: $courseid=~s/^\///;
2671: my $expiretime=600;
2672: if ($ENV{'request.role'} eq $roleid) {
2673: $expiretime=120;
2674: }
2675: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2676: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2677: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2678: &coursedescription($courseid);
2679: }
2680: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2681: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2682: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2683: &log($ENV{'user.domain'},$ENV{'user.name'},
2684: $ENV{'user.home'},
2685: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2686: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2687: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2688: return '';
2689: }
2690: }
2691: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2692: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2693: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2694: &log($ENV{'user.domain'},$ENV{'user.name'},
2695: $ENV{'user.home'},
2696: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2697: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2698: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2699: return '';
2700: }
2701: }
2702: }
2703: }
2704: }
2705:
2706: #
2707: # Rest of the restrictions depend on selected course
2708: #
2709:
2710: unless ($ENV{'request.course.id'}) {
2711: return '1';
2712: }
2713:
2714: #
2715: # Now user is definitely in a course
2716: #
2717:
2718:
2719: # Course preferences
2720:
2721: if ($thisallowed=~/C/) {
2722: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2723: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2724: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2725: =~/$rolecode/) {
2726: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2727: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2728: $ENV{'request.course.id'});
2729: return '';
2730: }
2731:
2732: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2733: =~/$unamedom/) {
2734: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2735: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2736: $ENV{'request.course.id'});
2737: return '';
2738: }
2739: }
2740:
2741: # Resource preferences
2742:
2743: if ($thisallowed=~/R/) {
2744: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2745: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2746: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2747: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2748: return '';
2749: }
2750: }
2751:
2752: # Restricted by state or randomout?
2753:
2754: if ($thisallowed=~/X/) {
2755: if ($ENV{'acc.randomout'}) {
2756: my $symb=&symbread($uri,1);
2757: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2758: return '';
2759: }
2760: }
2761: if (&condval($statecond)) {
2762: return '2';
2763: } else {
2764: return '';
2765: }
2766: }
2767:
2768: return 'F';
2769: }
2770:
2771: # --------------------------------------------------- Is a resource on the map?
2772:
2773: sub is_on_map {
2774: my $uri=&declutter(shift);
2775: my @uriparts=split(/\//,$uri);
2776: my $filename=$uriparts[$#uriparts];
2777: my $pathname=$uri;
2778: $pathname=~s|/\Q$filename\E$||;
2779: $pathname=~s/^adm\/wrapper\///;
2780: #Trying to find the conditional for the file
2781: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2782: /\&\Q$filename\E\:([\d\|]+)\&/);
2783: if ($match) {
2784: return (1,$1);
2785: } else {
2786: my ($name,$ext)=($filename=~/^(.+)\.(\w+)$/);
2787: $ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
2788: /\&(\Q$name\E\.\d+\.$ext)\:([\d\|]+)\&/;
2789: return (0,$2,$pathname.'/'.$1);
2790: }
2791: }
2792:
2793: # --------------------------------------------------------- Get symb from alias
2794:
2795: sub get_symb_from_alias {
2796: my $symb=shift;
2797: my ($map,$resid,$url)=&decode_symb($symb);
2798: # Already is a symb
2799: if ($url) { return $symb; }
2800: # Must be an alias
2801: my $aliassymb='';
2802: my %bighash;
2803: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2804: &GDBM_READER(),0640)) {
2805: my $rid=$bighash{'mapalias_'.$symb};
2806: if ($rid) {
2807: my ($mapid,$resid)=split(/\./,$rid);
2808: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
2809: $resid,$bighash{'src_'.$rid});
2810: }
2811: untie %bighash;
2812: }
2813: return $aliassymb;
2814: }
2815:
2816: # ----------------------------------------------------------------- Define Role
2817:
2818: sub definerole {
2819: if (allowed('mcr','/')) {
2820: my ($rolename,$sysrole,$domrole,$courole)=@_;
2821: foreach (split(':',$sysrole)) {
2822: my ($crole,$cqual)=split(/\&/,$_);
2823: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2824: if ($pr{'cr:s'}=~/$crole\&/) {
2825: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2826: return "refused:s:$crole&$cqual";
2827: }
2828: }
2829: }
2830: foreach (split(':',$domrole)) {
2831: my ($crole,$cqual)=split(/\&/,$_);
2832: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2833: if ($pr{'cr:d'}=~/$crole\&/) {
2834: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2835: return "refused:d:$crole&$cqual";
2836: }
2837: }
2838: }
2839: foreach (split(':',$courole)) {
2840: my ($crole,$cqual)=split(/\&/,$_);
2841: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2842: if ($pr{'cr:c'}=~/$crole\&/) {
2843: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2844: return "refused:c:$crole&$cqual";
2845: }
2846: }
2847: }
2848: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2849: "$ENV{'user.domain'}:$ENV{'user.name'}:".
2850: "rolesdef_$rolename=".
2851: escape($sysrole.'_'.$domrole.'_'.$courole);
2852: return reply($command,$ENV{'user.home'});
2853: } else {
2854: return 'refused';
2855: }
2856: }
2857:
2858: # ---------------- Make a metadata query against the network of library servers
2859:
2860: sub metadata_query {
2861: my ($query,$custom,$customshow,$server_array)=@_;
2862: my %rhash;
2863: my @server_list = (defined($server_array) ? @$server_array
2864: : keys(%libserv) );
2865: for my $server (@server_list) {
2866: unless ($custom or $customshow) {
2867: my $reply=&reply("querysend:".&escape($query),$server);
2868: $rhash{$server}=$reply;
2869: }
2870: else {
2871: my $reply=&reply("querysend:".&escape($query).':'.
2872: &escape($custom).':'.&escape($customshow),
2873: $server);
2874: $rhash{$server}=$reply;
2875: }
2876: }
2877: return \%rhash;
2878: }
2879:
2880: # ----------------------------------------- Send log queries and wait for reply
2881:
2882: sub log_query {
2883: my ($uname,$udom,$query,%filters)=@_;
2884: my $uhome=&homeserver($uname,$udom);
2885: if ($uhome eq 'no_host') { return 'error: no_host'; }
2886: my $uhost=$hostname{$uhome};
2887: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
2888: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2889: $uhome);
2890: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
2891: return get_query_reply($queryid);
2892: }
2893:
2894: sub get_query_reply {
2895: my $queryid=shift;
2896: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2897: my $reply='';
2898: for (1..100) {
2899: sleep 2;
2900: if (-e $replyfile.'.end') {
2901: if (my $fh=Apache::File->new($replyfile)) {
2902: $reply.=<$fh>;
2903: $fh->close;
2904: } else { return 'error: reply_file_error'; }
2905: return &unescape($reply);
2906: }
2907: }
2908: return 'timeout:'.$queryid;
2909: }
2910:
2911: sub courselog_query {
2912: #
2913: # possible filters:
2914: # url: url or symb
2915: # username
2916: # domain
2917: # action: view, submit, grade
2918: # start: timestamp
2919: # end: timestamp
2920: #
2921: my (%filters)=@_;
2922: unless ($ENV{'request.course.id'}) { return 'no_course'; }
2923: if ($filters{'url'}) {
2924: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2925: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2926: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2927: }
2928: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2929: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2930: return &log_query($cname,$cdom,'courselog',%filters);
2931: }
2932:
2933: sub userlog_query {
2934: my ($uname,$udom,%filters)=@_;
2935: return &log_query($uname,$udom,'userlog',%filters);
2936: }
2937:
2938: # ------------------------------------------------------------------ Plain Text
2939:
2940: sub plaintext {
2941: my $short=shift;
2942: return &mt($prp{$short});
2943: }
2944:
2945: # ----------------------------------------------------------------- Assign Role
2946:
2947: sub assignrole {
2948: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
2949: my $mrole;
2950: if ($role =~ /^cr\//) {
2951: my $cwosec=$url;
2952: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2953: unless (&allowed('ccr',$cwosec)) {
2954: &logthis('Refused custom assignrole: '.
2955: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2956: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2957: return 'refused';
2958: }
2959: $mrole='cr';
2960: } else {
2961: my $cwosec=$url;
2962: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2963: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
2964: &logthis('Refused assignrole: '.
2965: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2966: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2967: return 'refused';
2968: }
2969: $mrole=$role;
2970: }
2971: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2972: "$udom:$uname:$url".'_'."$mrole=$role";
2973: if ($end) { $command.='_'.$end; }
2974: if ($start) {
2975: if ($end) {
2976: $command.='_'.$start;
2977: } else {
2978: $command.='_0_'.$start;
2979: }
2980: }
2981: # actually delete
2982: if ($deleteflag) {
2983: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
2984: # modify command to delete the role
2985: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
2986: "$udom:$uname:$url".'_'."$mrole";
2987: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
2988: # set start and finish to negative values for userrolelog
2989: $start=-1;
2990: $end=-1;
2991: }
2992: }
2993: # send command
2994: my $answer=&reply($command,&homeserver($uname,$udom));
2995: # log new user role if status is ok
2996: if ($answer eq 'ok') {
2997: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
2998: }
2999: return $answer;
3000: }
3001:
3002: # -------------------------------------------------- Modify user authentication
3003: # Overrides without validation
3004:
3005: sub modifyuserauth {
3006: my ($udom,$uname,$umode,$upass)=@_;
3007: my $uhome=&homeserver($uname,$udom);
3008: unless (&allowed('mau',$udom)) { return 'refused'; }
3009: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3010: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3011: ' in domain '.$ENV{'request.role.domain'});
3012: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3013: &escape($upass),$uhome);
3014: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3015: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3016: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3017: &log($udom,,$uname,$uhome,
3018: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3019: $ENV{'user.name'}.', '.$umode.
3020: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3021: unless ($reply eq 'ok') {
3022: &logthis('Authentication mode error: '.$reply);
3023: return 'error: '.$reply;
3024: }
3025: return 'ok';
3026: }
3027:
3028: # --------------------------------------------------------------- Modify a user
3029:
3030: sub modifyuser {
3031: my ($udom, $uname, $uid,
3032: $umode, $upass, $first,
3033: $middle, $last, $gene,
3034: $forceid, $desiredhome, $email)=@_;
3035: $udom=~s/\W//g;
3036: $uname=~s/\W//g;
3037: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3038: $umode.', '.$first.', '.$middle.', '.
3039: $last.', '.$gene.'(forceid: '.$forceid.')'.
3040: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3041: ' desiredhome not specified').
3042: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3043: ' in domain '.$ENV{'request.role.domain'});
3044: my $uhome=&homeserver($uname,$udom,'true');
3045: # ----------------------------------------------------------------- Create User
3046: if (($uhome eq 'no_host') &&
3047: (($umode && $upass) || ($umode eq 'localauth'))) {
3048: my $unhome='';
3049: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3050: $unhome = $desiredhome;
3051: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
3052: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
3053: } else { # load balancing routine for determining $unhome
3054: my $tryserver;
3055: my $loadm=10000000;
3056: foreach $tryserver (keys %libserv) {
3057: if ($hostdom{$tryserver} eq $udom) {
3058: my $answer=reply('load',$tryserver);
3059: if (($answer=~/\d+/) && ($answer<$loadm)) {
3060: $loadm=$answer;
3061: $unhome=$tryserver;
3062: }
3063: }
3064: }
3065: }
3066: if (($unhome eq '') || ($unhome eq 'no_host')) {
3067: return 'error: unable to find a home server for '.$uname.
3068: ' in domain '.$udom;
3069: }
3070: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3071: &escape($upass),$unhome);
3072: unless ($reply eq 'ok') {
3073: return 'error: '.$reply;
3074: }
3075: $uhome=&homeserver($uname,$udom,'true');
3076: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3077: return 'error: unable verify users home machine.';
3078: }
3079: } # End of creation of new user
3080: # ---------------------------------------------------------------------- Add ID
3081: if ($uid) {
3082: $uid=~tr/A-Z/a-z/;
3083: my %uidhash=&idrget($udom,$uname);
3084: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3085: && (!$forceid)) {
3086: unless ($uid eq $uidhash{$uname}) {
3087: return 'error: user id "'.$uid.'" does not match '.
3088: 'current user id "'.$uidhash{$uname}.'".';
3089: }
3090: } else {
3091: &idput($udom,($uname => $uid));
3092: }
3093: }
3094: # -------------------------------------------------------------- Add names, etc
3095: my @tmp=&get('environment',
3096: ['firstname','middlename','lastname','generation'],
3097: $udom,$uname);
3098: my %names;
3099: if ($tmp[0] =~ m/^error:.*/) {
3100: %names=();
3101: } else {
3102: %names = @tmp;
3103: }
3104: #
3105: # Make sure to not trash student environment if instructor does not bother
3106: # to supply name and email information
3107: #
3108: if ($first) { $names{'firstname'} = $first; }
3109: if (defined($middle)) { $names{'middlename'} = $middle; }
3110: if ($last) { $names{'lastname'} = $last; }
3111: if (defined($gene)) { $names{'generation'} = $gene; }
3112: if ($email) { $names{'notification'} = $email;
3113: $names{'critnotification'} = $email; }
3114:
3115: my $reply = &put('environment', \%names, $udom,$uname);
3116: if ($reply ne 'ok') { return 'error: '.$reply; }
3117: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3118: $umode.', '.$first.', '.$middle.', '.
3119: $last.', '.$gene.' by '.
3120: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3121: return 'ok';
3122: }
3123:
3124: # -------------------------------------------------------------- Modify student
3125:
3126: sub modifystudent {
3127: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3128: $end,$start,$forceid,$desiredhome,$email)=@_;
3129: my $cid='';
3130: unless ($cid=$ENV{'request.course.id'}) {
3131: return 'not_in_class';
3132: }
3133: # --------------------------------------------------------------- Make the user
3134: my $reply=&modifyuser
3135: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3136: $desiredhome,$email);
3137: unless ($reply eq 'ok') { return $reply; }
3138: # This will cause &modify_student_enrollment to get the uid from the
3139: # students environment
3140: $uid = undef if (!$forceid);
3141: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
3142: $last,$gene,$usec,$end,$start);
3143: return $reply;
3144: }
3145:
3146: sub modify_student_enrollment {
3147: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
3148: # Get the course id from the environment
3149: my $cid='';
3150: unless ($cid=$ENV{'request.course.id'}) {
3151: return 'not_in_class';
3152: }
3153: # Make sure the user exists
3154: my $uhome=&homeserver($uname,$udom);
3155: if (($uhome eq '') || ($uhome eq 'no_host')) {
3156: return 'error: no such user';
3157: }
3158: #
3159: # Get student data if we were not given enough information
3160: if (!defined($first) || $first eq '' ||
3161: !defined($last) || $last eq '' ||
3162: !defined($uid) || $uid eq '' ||
3163: !defined($middle) || $middle eq '' ||
3164: !defined($gene) || $gene eq '') {
3165: # They did not supply us with enough data to enroll the student, so
3166: # we need to pick up more information.
3167: my %tmp = &get('environment',
3168: ['firstname','middlename','lastname', 'generation','id']
3169: ,$udom,$uname);
3170:
3171: foreach (keys(%tmp)) {
3172: &logthis("key $_ = ".$tmp{$_});
3173: }
3174: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3175: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3176: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3177: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3178: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3179: }
3180: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
3181: $first,$middle);
3182: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
3183: $ENV{'course.'.$cid.'.num'}.':classlist:'.
3184: &escape($uname.':'.$udom).'='.
3185: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
3186: $ENV{'course.'.$cid.'.home'});
3187: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3188: return 'error: '.$reply;
3189: }
3190: # Add student role to user
3191: my $uurl='/'.$cid;
3192: $uurl=~s/\_/\//g;
3193: if ($usec) {
3194: $uurl.='/'.$usec;
3195: }
3196: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3197: }
3198:
3199: # ------------------------------------------------- Write to course preferences
3200:
3201: sub writecoursepref {
3202: my ($courseid,%prefs)=@_;
3203: $courseid=~s/^\///;
3204: $courseid=~s/\_/\//g;
3205: my ($cdomain,$cnum)=split(/\//,$courseid);
3206: my $chome=homeserver($cnum,$cdomain);
3207: if (($chome eq '') || ($chome eq 'no_host')) {
3208: return 'error: no such course';
3209: }
3210: my $cstring='';
3211: foreach (keys %prefs) {
3212: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3213: }
3214: $cstring=~s/\&$//;
3215: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3216: }
3217:
3218: # ---------------------------------------------------------- Make/modify course
3219:
3220: sub createcourse {
3221: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
3222: $url=&declutter($url);
3223: my $cid='';
3224: unless (&allowed('ccc',$udom)) {
3225: return 'refused';
3226: }
3227: # ------------------------------------------------------------------- Create ID
3228: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3229: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3230: # ----------------------------------------------- Make sure that does not exist
3231: my $uhome=&homeserver($uname,$udom,'true');
3232: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3233: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3234: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3235: $uhome=&homeserver($uname,$udom,'true');
3236: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3237: return 'error: unable to generate unique course-ID';
3238: }
3239: }
3240: # ------------------------------------------------ Check supplied server name
3241: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3242: if (! exists($libserv{$course_server})) {
3243: return 'error:bad server name '.$course_server;
3244: }
3245: # ------------------------------------------------------------- Make the course
3246: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3247: $course_server);
3248: unless ($reply eq 'ok') { return 'error: '.$reply; }
3249: $uhome=&homeserver($uname,$udom,'true');
3250: if (($uhome eq '') || ($uhome eq 'no_host')) {
3251: return 'error: no such course';
3252: }
3253: # ----------------------------------------------------------------- Course made
3254: # log existance
3255: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),
3256: $uhome);
3257: &flushcourselogs();
3258: # set toplevel url
3259: my $topurl=$url;
3260: unless ($nonstandard) {
3261: # ------------------------------------------ For standard courses, make top url
3262: my $mapurl=&clutter($url);
3263: if ($mapurl eq '/res/') { $mapurl=''; }
3264: $ENV{'form.initmap'}=(<<ENDINITMAP);
3265: <map>
3266: <resource id="1" type="start"></resource>
3267: <resource id="2" src="$mapurl"></resource>
3268: <resource id="3" type="finish"></resource>
3269: <link index="1" from="1" to="2"></link>
3270: <link index="2" from="2" to="3"></link>
3271: </map>
3272: ENDINITMAP
3273: $topurl=&declutter(
3274: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3275: );
3276: }
3277: # ----------------------------------------------------------- Write preferences
3278: &writecoursepref($udom.'_'.$uname,
3279: ('description' => $description,
3280: 'url' => $topurl));
3281: return '/'.$udom.'/'.$uname;
3282: }
3283:
3284: # ---------------------------------------------------------- Assign Custom Role
3285:
3286: sub assigncustomrole {
3287: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3288: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3289: $end,$start,$deleteflag);
3290: }
3291:
3292: # ----------------------------------------------------------------- Revoke Role
3293:
3294: sub revokerole {
3295: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3296: my $now=time;
3297: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3298: }
3299:
3300: # ---------------------------------------------------------- Revoke Custom Role
3301:
3302: sub revokecustomrole {
3303: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3304: my $now=time;
3305: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3306: $deleteflag);
3307: }
3308:
3309: # ------------------------------------------------------------ Directory lister
3310:
3311: sub dirlist {
3312: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3313:
3314: $uri=~s/^\///;
3315: $uri=~s/\/$//;
3316: my ($udom, $uname);
3317: (undef,$udom,$uname)=split(/\//,$uri);
3318: if(defined($userdomain)) {
3319: $udom = $userdomain;
3320: }
3321: if(defined($username)) {
3322: $uname = $username;
3323: }
3324:
3325: my $dirRoot = $perlvar{'lonDocRoot'};
3326: if(defined($alternateDirectoryRoot)) {
3327: $dirRoot = $alternateDirectoryRoot;
3328: $dirRoot =~ s/\/$//;
3329: }
3330:
3331: if($udom) {
3332: if($uname) {
3333: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3334: homeserver($uname,$udom));
3335: return split(/:/,$listing);
3336: } elsif(!defined($alternateDirectoryRoot)) {
3337: my $tryserver;
3338: my %allusers=();
3339: foreach $tryserver (keys %libserv) {
3340: if($hostdom{$tryserver} eq $udom) {
3341: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3342: $udom, $tryserver);
3343: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3344: && ($listing ne 'con_lost')) {
3345: foreach (split(/:/,$listing)) {
3346: my ($entry,@stat)=split(/&/,$_);
3347: $allusers{$entry}=1;
3348: }
3349: }
3350: }
3351: }
3352: my $alluserstr='';
3353: foreach (sort keys %allusers) {
3354: $alluserstr.=$_.'&user:';
3355: }
3356: $alluserstr=~s/:$//;
3357: return split(/:/,$alluserstr);
3358: } else {
3359: my @emptyResults = ();
3360: push(@emptyResults, 'missing user name');
3361: return split(':',@emptyResults);
3362: }
3363: } elsif(!defined($alternateDirectoryRoot)) {
3364: my $tryserver;
3365: my %alldom=();
3366: foreach $tryserver (keys %libserv) {
3367: $alldom{$hostdom{$tryserver}}=1;
3368: }
3369: my $alldomstr='';
3370: foreach (sort keys %alldom) {
3371: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3372: }
3373: $alldomstr=~s/:$//;
3374: return split(/:/,$alldomstr);
3375: } else {
3376: my @emptyResults = ();
3377: push(@emptyResults, 'missing domain');
3378: return split(':',@emptyResults);
3379: }
3380: }
3381:
3382: # --------------------------------------------- GetFileTimestamp
3383: # This function utilizes dirlist and returns the date stamp for
3384: # when it was last modified. It will also return an error of -1
3385: # if an error occurs
3386:
3387: ##
3388: ## FIXME: This subroutine assumes its caller knows something about the
3389: ## directory structure of the home server for the student ($root).
3390: ## Not a good assumption to make. Since this is for looking up files
3391: ## in user directories, the full path should be constructed by lond, not
3392: ## whatever machine we request data from.
3393: ##
3394: sub GetFileTimestamp {
3395: my ($studentDomain,$studentName,$filename,$root)=@_;
3396: $studentDomain=~s/\W//g;
3397: $studentName=~s/\W//g;
3398: my $subdir=$studentName.'__';
3399: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3400: my $proname="$studentDomain/$subdir/$studentName";
3401: $proname .= '/'.$filename;
3402: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3403: $studentName, $root);
3404: my @stats = split('&', $fileStat);
3405: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
3406: # @stats contains first the filename, then the stat output
3407: return $stats[10]; # so this is 10 instead of 9.
3408: } else {
3409: return -1;
3410: }
3411: }
3412:
3413: # -------------------------------------------------------- Value of a Condition
3414:
3415: sub directcondval {
3416: my $number=shift;
3417: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3418: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3419: } else {
3420: return 2;
3421: }
3422: }
3423:
3424: sub condval {
3425: my $condidx=shift;
3426: my $result=0;
3427: my $allpathcond='';
3428: foreach (split(/\|/,$condidx)) {
3429: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3430: $allpathcond.=
3431: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3432: }
3433: }
3434: $allpathcond=~s/\|$//;
3435: if ($ENV{'request.course.id'}) {
3436: if ($allpathcond) {
3437: my $operand='|';
3438: my @stack;
3439: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3440: if ($_ eq '(') {
3441: push @stack,($operand,$result)
3442: } elsif ($_ eq ')') {
3443: my $before=pop @stack;
3444: if (pop @stack eq '&') {
3445: $result=$result>$before?$before:$result;
3446: } else {
3447: $result=$result>$before?$result:$before;
3448: }
3449: } elsif (($_ eq '&') || ($_ eq '|')) {
3450: $operand=$_;
3451: } else {
3452: my $new=directcondval($_);
3453: if ($operand eq '&') {
3454: $result=$result>$new?$new:$result;
3455: } else {
3456: $result=$result>$new?$result:$new;
3457: }
3458: }
3459: }
3460: }
3461: }
3462: return $result;
3463: }
3464:
3465: # ---------------------------------------------------- Devalidate courseresdata
3466:
3467: sub devalidatecourseresdata {
3468: my ($coursenum,$coursedomain)=@_;
3469: my $hashid=$coursenum.':'.$coursedomain;
3470: &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
3471: }
3472:
3473: # --------------------------------------------------- Course Resourcedata Query
3474:
3475: sub courseresdata {
3476: my ($coursenum,$coursedomain,@which)=@_;
3477: my $coursehom=&homeserver($coursenum,$coursedomain);
3478: my $hashid=$coursenum.':'.$coursedomain;
3479: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
3480: unless (defined($cached)) {
3481: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
3482: $result=\%dumpreply;
3483: my ($tmp) = keys(%dumpreply);
3484: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
3485: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3486: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3487: return $tmp;
3488: } elsif ($tmp =~ /^(error)/) {
3489: $result=undef;
3490: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
3491: }
3492: }
3493: foreach my $item (@which) {
3494: if (defined($result->{$item})) {
3495: return $result->{$item};
3496: }
3497: }
3498: return undef;
3499: }
3500:
3501: #
3502: # EXT resource caching routines
3503: #
3504:
3505: sub clear_EXT_cache_status {
3506: &delenv('cache.EXT.');
3507: }
3508:
3509: sub EXT_cache_status {
3510: my ($target_domain,$target_user) = @_;
3511: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3512: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
3513: # We know already the user has no data
3514: return 1;
3515: } else {
3516: return 0;
3517: }
3518: }
3519:
3520: sub EXT_cache_set {
3521: my ($target_domain,$target_user) = @_;
3522: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
3523: &appenv($cachename => time);
3524: }
3525:
3526: # --------------------------------------------------------- Value of a Variable
3527: sub EXT {
3528: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
3529:
3530: unless ($varname) { return ''; }
3531: #get real user name/domain, courseid and symb
3532: my $courseid;
3533: my $publicuser;
3534: if ($symbparm) {
3535: $symbparm=&get_symb_from_alias($symbparm);
3536: }
3537: if (!($uname && $udom)) {
3538: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
3539: &Apache::lonxml::whichuser($symbparm);
3540: if (!$symbparm) { $symbparm=$cursymb; }
3541: } else {
3542: $courseid=$ENV{'request.course.id'};
3543: }
3544: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3545: my $rest;
3546: if (defined($therest[0])) {
3547: $rest=join('.',@therest);
3548: } else {
3549: $rest='';
3550: }
3551:
3552: my $qualifierrest=$qualifier;
3553: if ($rest) { $qualifierrest.='.'.$rest; }
3554: my $spacequalifierrest=$space;
3555: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
3556: if ($realm eq 'user') {
3557: # --------------------------------------------------------------- user.resource
3558: if ($space eq 'resource') {
3559: if (defined($Apache::lonhomework::parsing_a_problem)) {
3560: return $Apache::lonhomework::history{$qualifierrest};
3561: } else {
3562: my %restored;
3563: if ($publicuser || $ENV{'request.state'} eq 'construct') {
3564: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
3565: } else {
3566: %restored=&restore($symbparm,$courseid,$udom,$uname);
3567: }
3568: return $restored{$qualifierrest};
3569: }
3570: # ----------------------------------------------------------------- user.access
3571: } elsif ($space eq 'access') {
3572: # FIXME - not supporting calls for a specific user
3573: return &allowed($qualifier,$rest);
3574: # ------------------------------------------ user.preferences, user.environment
3575: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
3576: if (($uname eq $ENV{'user.name'}) &&
3577: ($udom eq $ENV{'user.domain'})) {
3578: return $ENV{join('.',('environment',$qualifierrest))};
3579: } else {
3580: my %returnhash;
3581: if (!$publicuser) {
3582: %returnhash=&userenvironment($udom,$uname,
3583: $qualifierrest);
3584: }
3585: return $returnhash{$qualifierrest};
3586: }
3587: # ----------------------------------------------------------------- user.course
3588: } elsif ($space eq 'course') {
3589: # FIXME - not supporting calls for a specific user
3590: return $ENV{join('.',('request.course',$qualifier))};
3591: # ------------------------------------------------------------------- user.role
3592: } elsif ($space eq 'role') {
3593: # FIXME - not supporting calls for a specific user
3594: my ($role,$where)=split(/\./,$ENV{'request.role'});
3595: if ($qualifier eq 'value') {
3596: return $role;
3597: } elsif ($qualifier eq 'extent') {
3598: return $where;
3599: }
3600: # ----------------------------------------------------------------- user.domain
3601: } elsif ($space eq 'domain') {
3602: return $udom;
3603: # ------------------------------------------------------------------- user.name
3604: } elsif ($space eq 'name') {
3605: return $uname;
3606: # ---------------------------------------------------- Any other user namespace
3607: } else {
3608: my %reply;
3609: if (!$publicuser) {
3610: %reply=&get($space,[$qualifierrest],$udom,$uname);
3611: }
3612: return $reply{$qualifierrest};
3613: }
3614: } elsif ($realm eq 'query') {
3615: # ---------------------------------------------- pull stuff out of query string
3616: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
3617: [$spacequalifierrest]);
3618: return $ENV{'form.'.$spacequalifierrest};
3619: } elsif ($realm eq 'request') {
3620: # ------------------------------------------------------------- request.browser
3621: if ($space eq 'browser') {
3622: if ($qualifier eq 'textremote') {
3623: if (&mt('textual_remote_display') eq 'on') {
3624: return 1;
3625: } else {
3626: return 0;
3627: }
3628: } else {
3629: return $ENV{'browser.'.$qualifier};
3630: }
3631: # ------------------------------------------------------------ request.filename
3632: } else {
3633: return $ENV{'request.'.$spacequalifierrest};
3634: }
3635: } elsif ($realm eq 'course') {
3636: # ---------------------------------------------------------- course.description
3637: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
3638: } elsif ($realm eq 'resource') {
3639:
3640: my $section;
3641: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
3642:
3643: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
3644:
3645: # ----------------------------------------------------- Cascading lookup scheme
3646: if (!$symbparm) { $symbparm=&symbread(); }
3647: my $symbp=$symbparm;
3648: my $mapp=(&decode_symb($symbp))[0];
3649:
3650: my $symbparm=$symbp.'.'.$spacequalifierrest;
3651: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3652:
3653: if (($ENV{'user.name'} eq $uname) &&
3654: ($ENV{'user.domain'} eq $udom)) {
3655: $section=$ENV{'request.course.sec'};
3656: } else {
3657: if (! defined($usection)) {
3658: $section=&usection($udom,$uname,$courseid);
3659: } else {
3660: $section = $usection;
3661: }
3662: }
3663:
3664: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3665: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3666: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3667:
3668: my $courselevel=$courseid.'.'.$spacequalifierrest;
3669: my $courselevelr=$courseid.'.'.$symbparm;
3670: my $courselevelm=$courseid.'.'.$mapparm;
3671:
3672: # ----------------------------------------------------------- first, check user
3673: #most student don\'t have any data set, check if there is some data
3674: if (! &EXT_cache_status($udom,$uname)) {
3675: my $hashid="$udom:$uname";
3676: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
3677: 'userres');
3678: if (!defined($cached)) {
3679: my %resourcedata=&get('resourcedata',
3680: [$courselevelr,$courselevelm,
3681: $courselevel],$udom,$uname);
3682: $result=\%resourcedata;
3683: &do_cache(\%userresdatacache,$hashid,$result,'userres');
3684: }
3685: my ($tmp)=keys(%$result);
3686: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
3687: if ($$result{$courselevelr}) {
3688: return $$result{$courselevelr}; }
3689: if ($$result{$courselevelm}) {
3690: return $$result{$courselevelm}; }
3691: if ($$result{$courselevel}) {
3692: return $$result{$courselevel}; }
3693: } else {
3694: if ($tmp!~/No such file/) {
3695: &logthis("<font color=blue>WARNING:".
3696: " Trying to get resource data for ".
3697: $uname." at ".$udom.": ".
3698: $tmp."</font>");
3699: } elsif ($tmp=~/error:No such file/) {
3700: &EXT_cache_set($udom,$uname);
3701: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3702: return $tmp;
3703: }
3704: }
3705: }
3706:
3707: # -------------------------------------------------------- second, check course
3708:
3709: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3710: $ENV{'course.'.$courseid.'.domain'},
3711: ($seclevelr,$seclevelm,$seclevel,
3712: $courselevelr,$courselevelm,
3713: $courselevel));
3714: if (defined($coursereply)) { return $coursereply; }
3715:
3716: # ------------------------------------------------------ third, check map parms
3717: my %parmhash=();
3718: my $thisparm='';
3719: if (tie(%parmhash,'GDBM_File',
3720: $ENV{'request.course.fn'}.'_parms.db',
3721: &GDBM_READER(),0640)) {
3722: $thisparm=$parmhash{$symbparm};
3723: untie(%parmhash);
3724: }
3725: if ($thisparm) { return $thisparm; }
3726: }
3727: # --------------------------------------------- last, look in resource metadata
3728:
3729: $spacequalifierrest=~s/\./\_/;
3730: my $filename;
3731: if (!$symbparm) { $symbparm=&symbread(); }
3732: if ($symbparm) {
3733: $filename=(&decode_symb($symbparm))[2];
3734: } else {
3735: $filename=$ENV{'request.filename'};
3736: }
3737: my $metadata=&metadata($filename,$spacequalifierrest);
3738: if (defined($metadata)) { return $metadata; }
3739: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
3740: if (defined($metadata)) { return $metadata; }
3741:
3742: # ------------------------------------------------------------------ Cascade up
3743: unless ($space eq '0') {
3744: my @parts=split(/_/,$space);
3745: my $id=pop(@parts);
3746: my $part=join('_',@parts);
3747: if ($part eq '') { $part='0'; }
3748: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
3749: $symbparm,$udom,$uname,$section,1);
3750: if (defined($partgeneral)) { return $partgeneral; }
3751: }
3752: if ($recurse) { return undef; }
3753: my $pack_def=&packages_tab_default($filename,$varname);
3754: if (defined($pack_def)) { return $pack_def; }
3755:
3756: # ---------------------------------------------------- Any other user namespace
3757: } elsif ($realm eq 'environment') {
3758: # ----------------------------------------------------------------- environment
3759: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3760: return $ENV{'environment.'.$spacequalifierrest};
3761: } else {
3762: my %returnhash=&userenvironment($udom,$uname,
3763: $spacequalifierrest);
3764: return $returnhash{$spacequalifierrest};
3765: }
3766: } elsif ($realm eq 'system') {
3767: # ----------------------------------------------------------------- system.time
3768: if ($space eq 'time') {
3769: return time;
3770: }
3771: }
3772: return '';
3773: }
3774:
3775: sub packages_tab_default {
3776: my ($uri,$varname)=@_;
3777: my (undef,$part,$name)=split(/\./,$varname);
3778: my $packages=&metadata($uri,'packages');
3779: foreach my $package (split(/,/,$packages)) {
3780: my ($pack_type,$pack_part)=split(/_/,$package,2);
3781: if ($pack_part eq $part) {
3782: return $packagetab{"$pack_type&$name&default"};
3783: }
3784: }
3785: return undef;
3786: }
3787:
3788: sub add_prefix_and_part {
3789: my ($prefix,$part)=@_;
3790: my $keyroot;
3791: if (defined($prefix) && $prefix !~ /^__/) {
3792: # prefix that has a part already
3793: $keyroot=$prefix;
3794: } elsif (defined($prefix)) {
3795: # prefix that is missing a part
3796: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3797: } else {
3798: # no prefix at all
3799: if (defined($part)) { $keyroot='_'.$part; }
3800: }
3801: return $keyroot;
3802: }
3803:
3804: # ---------------------------------------------------------------- Get metadata
3805:
3806: sub metadata {
3807: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
3808: $uri=&declutter($uri);
3809: # if it is a non metadata possible uri return quickly
3810: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
3811: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
3812: ($uri =~ m|home/[^/]+/public_html/|)) {
3813: return '';
3814: }
3815: my $filename=$uri;
3816: $uri=~s/\.meta$//;
3817: #
3818: # Is the metadata already cached?
3819: # Look at timestamp of caching
3820: # Everything is cached by the main uri, libraries are never directly cached
3821: #
3822: if (!defined($liburi)) {
3823: my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
3824: if (defined($cached)) { return $result->{':'.$what}; }
3825: }
3826: {
3827: #
3828: # Is this a recursive call for a library?
3829: #
3830: my %lcmetacache;
3831: if ($liburi) {
3832: $liburi=&declutter($liburi);
3833: $filename=$liburi;
3834: } else {
3835: &devalidate_cache(\%metacache,$uri,'meta');
3836: }
3837: my %metathesekeys=();
3838: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
3839: my $metastring=&getfile(&filelocation('',&clutter($filename)));
3840: my $parser=HTML::LCParser->new(\$metastring);
3841: my $token;
3842: undef %metathesekeys;
3843: while ($token=$parser->get_token) {
3844: if ($token->[0] eq 'S') {
3845: if (defined($token->[2]->{'package'})) {
3846: #
3847: # This is a package - get package info
3848: #
3849: my $package=$token->[2]->{'package'};
3850: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3851: if (defined($token->[2]->{'id'})) {
3852: $keyroot.='_'.$token->[2]->{'id'};
3853: }
3854: if ($lcmetacache{':packages'}) {
3855: $lcmetacache{':packages'}.=','.$package.$keyroot;
3856: } else {
3857: $lcmetacache{':packages'}=$package.$keyroot;
3858: }
3859: foreach (keys %packagetab) {
3860: my $part=$keyroot;
3861: $part=~s/^\_//;
3862: if ($_=~/^\Q$package\E\&/ ||
3863: $_=~/^\Q$package\E_0\&/) {
3864: my ($pack,$name,$subp)=split(/\&/,$_);
3865: # ignore package.tab specified default values
3866: # here &package_tab_default() will fetch those
3867: if ($subp eq 'default') { next; }
3868: my $value=$packagetab{$_};
3869: my $unikey;
3870: if ($pack =~ /_0$/) {
3871: $unikey='parameter_0_'.$name;
3872: $part=0;
3873: } else {
3874: $unikey='parameter'.$keyroot.'_'.$name;
3875: }
3876: if ($subp eq 'display') {
3877: $value.=' [Part: '.$part.']';
3878: }
3879: $lcmetacache{':'.$unikey.'.part'}=$part;
3880: $metathesekeys{$unikey}=1;
3881: unless (defined($lcmetacache{':'.$unikey.'.'.$subp})) {
3882: $lcmetacache{':'.$unikey.'.'.$subp}=$value;
3883: }
3884: if (defined($lcmetacache{':'.$unikey.'.default'})) {
3885: $lcmetacache{':'.$unikey}=
3886: $lcmetacache{':'.$unikey.'.default'};
3887: }
3888: }
3889: }
3890: } else {
3891: #
3892: # This is not a package - some other kind of start tag
3893: #
3894: my $entry=$token->[1];
3895: my $unikey;
3896: if ($entry eq 'import') {
3897: $unikey='';
3898: } else {
3899: $unikey=$entry;
3900: }
3901: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3902:
3903: if (defined($token->[2]->{'id'})) {
3904: $unikey.='_'.$token->[2]->{'id'};
3905: }
3906:
3907: if ($entry eq 'import') {
3908: #
3909: # Importing a library here
3910: #
3911: if ($depthcount<20) {
3912: my $location=$parser->get_text('/import');
3913: my $dir=$filename;
3914: $dir=~s|[^/]*$||;
3915: $location=&filelocation($dir,$location);
3916: foreach (sort(split(/\,/,&metadata($uri,'keys',
3917: $location,$unikey,
3918: $depthcount+1)))) {
3919: $metathesekeys{$_}=1;
3920: }
3921: }
3922: } else {
3923:
3924: if (defined($token->[2]->{'name'})) {
3925: $unikey.='_'.$token->[2]->{'name'};
3926: }
3927: $metathesekeys{$unikey}=1;
3928: foreach (@{$token->[3]}) {
3929: $lcmetacache{':'.$unikey.'.'.$_}=$token->[2]->{$_};
3930: }
3931: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
3932: my $default=$lcmetacache{':'.$unikey.'.default'};
3933: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3934: # only ws inside the tag, and not in default, so use default
3935: # as value
3936: $lcmetacache{':'.$unikey}=$default;
3937: } else {
3938: # either something interesting inside the tag or default
3939: # uninteresting
3940: $lcmetacache{':'.$unikey}=$internaltext;
3941: }
3942: # end of not-a-package not-a-library import
3943: }
3944: # end of not-a-package start tag
3945: }
3946: # the next is the end of "start tag"
3947: }
3948: }
3949: # are there custom rights to evaluate
3950: if ($lcmetacache{':copyright'} eq 'custom') {
3951:
3952: #
3953: # Importing a rights file here
3954: #
3955: unless ($depthcount) {
3956: my $location=$lcmetacache{':customdistributionfile'};
3957: my $dir=$filename;
3958: $dir=~s|[^/]*$||;
3959: $location=&filelocation($dir,$location);
3960: foreach (sort(split(/\,/,&metadata($uri,'keys',
3961: $location,'_rights',
3962: $depthcount+1)))) {
3963: $metathesekeys{$_}=1;
3964: }
3965: }
3966: }
3967: $lcmetacache{':keys'}=join(',',keys %metathesekeys);
3968: &metadata_generate_part0(\%metathesekeys,\%lcmetacache,$uri);
3969: $lcmetacache{':allpossiblekeys'}=join(',',keys %metathesekeys);
3970: &do_cache(\%metacache,$uri,\%lcmetacache,'meta');
3971: # this is the end of "was not already recently cached
3972: }
3973: return $metacache{$uri}->{':'.$what};
3974: }
3975:
3976: sub metadata_generate_part0 {
3977: my ($metadata,$metacache,$uri) = @_;
3978: my %allnames;
3979: foreach my $metakey (sort keys %$metadata) {
3980: if ($metakey=~/^parameter\_(.*)/) {
3981: my $part=$$metacache{':'.$metakey.'.part'};
3982: my $name=$$metacache{':'.$metakey.'.name'};
3983: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
3984: $allnames{$name}=$part;
3985: }
3986: }
3987: }
3988: foreach my $name (keys(%allnames)) {
3989: $$metadata{"parameter_0_$name"}=1;
3990: my $key=":parameter_0_$name";
3991: $$metacache{"$key.part"}='0';
3992: $$metacache{"$key.name"}=$name;
3993: $$metacache{"$key.type"}=$$metacache{':parameter_'.
3994: $allnames{$name}.'_'.$name.
3995: '.type'};
3996: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
3997: '.display'};
3998: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3999: $olddis=~s/$expr/\[Part: 0\]/;
4000: $$metacache{"$key.display"}=$olddis;
4001: }
4002: }
4003:
4004: # ------------------------------------------------- Get the title of a resource
4005:
4006: sub gettitle {
4007: my $urlsymb=shift;
4008: my $symb=&symbread($urlsymb);
4009: unless ($symb) {
4010: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
4011: return &metadata($urlsymb,'title');
4012: }
4013: my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
4014: if (defined($cached)) { return $result; }
4015: my ($map,$resid,$url)=&decode_symb($symb);
4016: my $title='';
4017: my %bighash;
4018: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4019: &GDBM_READER(),0640)) {
4020: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4021: $title=$bighash{'title_'.$mapid.'.'.$resid};
4022: untie %bighash;
4023: }
4024: $title=~s/\&colon\;/\:/gs;
4025: if ($title) {
4026: return &do_cache(\%titlecache,$symb,$title,'title');
4027: } else {
4028: return &metadata($urlsymb,'title');
4029: }
4030: }
4031:
4032: # ------------------------------------------------- Update symbolic store links
4033:
4034: sub symblist {
4035: my ($mapname,%newhash)=@_;
4036: $mapname=declutter($mapname);
4037: my %hash;
4038: if (($ENV{'request.course.fn'}) && (%newhash)) {
4039: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4040: &GDBM_WRCREAT(),0640)) {
4041: foreach (keys %newhash) {
4042: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
4043: }
4044: if (untie(%hash)) {
4045: return 'ok';
4046: }
4047: }
4048: }
4049: return 'error';
4050: }
4051:
4052: # --------------------------------------------------------------- Verify a symb
4053:
4054: sub symbverify {
4055: my ($symb,$thisfn)=@_;
4056: $thisfn=&symbclean(&declutter($thisfn));
4057: # direct jump to resource in page or to a sequence - will construct own symbs
4058: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4059: # check URL part
4060: my ($map,$resid,$url)=&decode_symb($symb);
4061: unless ($url eq $thisfn) { return 0; }
4062:
4063: $symb=&symbclean($symb);
4064:
4065: my %bighash;
4066: my $okay=0;
4067:
4068: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4069: &GDBM_READER(),0640)) {
4070: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4071: unless ($ids) {
4072: $ids=$bighash{'ids_/'.$thisfn};
4073: }
4074: if ($ids) {
4075: # ------------------------------------------------------------------- Has ID(s)
4076: foreach (split(/\,/,$ids)) {
4077: my ($mapid,$resid)=split(/\./,$_);
4078: if (
4079: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4080: eq $symb) {
4081: $okay=1;
4082: }
4083: }
4084: }
4085: untie(%bighash);
4086: }
4087: return $okay;
4088: }
4089:
4090: # --------------------------------------------------------------- Clean-up symb
4091:
4092: sub symbclean {
4093: my $symb=shift;
4094:
4095: # remove version from map
4096: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4097:
4098: # remove version from URL
4099: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4100:
4101: return $symb;
4102: }
4103:
4104: # ---------------------------------------------- Split symb to find map and url
4105:
4106: sub encode_symb {
4107: my ($map,$resid,$url)=@_;
4108: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4109: }
4110:
4111: sub decode_symb {
4112: my ($map,$resid,$url)=split(/\_\_\_/,shift);
4113: return (&fixversion($map),$resid,&fixversion($url));
4114: }
4115:
4116: sub fixversion {
4117: my $fn=shift;
4118: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
4119: my ($match,$cond,$versioned)=&is_on_map($fn);
4120: unless ($match) {
4121: $fn=$versioned;
4122: }
4123: return $fn;
4124: }
4125:
4126: # ------------------------------------------------------ Return symb list entry
4127:
4128: sub symbread {
4129: my ($thisfn,$donotrecurse)=@_;
4130: # no filename provided? try from environment
4131: unless ($thisfn) {
4132: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
4133: $thisfn=$ENV{'request.filename'};
4134: }
4135: # is that filename actually a symb? Verify, clean, and return
4136: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4137: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
4138: }
4139: $thisfn=declutter($thisfn);
4140: my %hash;
4141: my %bighash;
4142: my $syval='';
4143: if (($ENV{'request.course.fn'}) && ($thisfn)) {
4144: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4145: &GDBM_READER(),0640)) {
4146: $syval=$hash{$thisfn};
4147: untie(%hash);
4148: }
4149: # ---------------------------------------------------------- There was an entry
4150: if ($syval) {
4151: unless ($syval=~/\_\d+$/) {
4152: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
4153: &appenv('request.ambiguous' => $thisfn);
4154: return '';
4155: }
4156: $syval.=$1;
4157: }
4158: } else {
4159: # ------------------------------------------------------- Was not in symb table
4160: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4161: &GDBM_READER(),0640)) {
4162: # ---------------------------------------------- Get ID(s) for current resource
4163: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4164: unless ($ids) {
4165: $ids=$bighash{'ids_/'.$thisfn};
4166: }
4167: unless ($ids) {
4168: # alias?
4169: $ids=$bighash{'mapalias_'.$thisfn};
4170: }
4171: if ($ids) {
4172: # ------------------------------------------------------------------- Has ID(s)
4173: my @possibilities=split(/\,/,$ids);
4174: if ($#possibilities==0) {
4175: # ----------------------------------------------- There is only one possibility
4176: my ($mapid,$resid)=split(/\./,$ids);
4177: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
4178: } elsif (!$donotrecurse) {
4179: # ------------------------------------------ There is more than one possibility
4180: my $realpossible=0;
4181: foreach (@possibilities) {
4182: my $file=$bighash{'src_'.$_};
4183: if (&allowed('bre',$file)) {
4184: my ($mapid,$resid)=split(/\./,$_);
4185: if ($bighash{'map_type_'.$mapid} ne 'page') {
4186: $realpossible++;
4187: $syval=declutter($bighash{'map_id_'.$mapid}).
4188: '___'.$resid;
4189: }
4190: }
4191: }
4192: if ($realpossible!=1) { $syval=''; }
4193: } else {
4194: $syval='';
4195: }
4196: }
4197: untie(%bighash)
4198: }
4199: }
4200: if ($syval) {
4201: return &symbclean($syval.'___'.$thisfn);
4202: }
4203: }
4204: &appenv('request.ambiguous' => $thisfn);
4205: return '';
4206: }
4207:
4208: # ---------------------------------------------------------- Return random seed
4209:
4210: sub numval {
4211: my $txt=shift;
4212: $txt=~tr/A-J/0-9/;
4213: $txt=~tr/a-j/0-9/;
4214: $txt=~tr/K-T/0-9/;
4215: $txt=~tr/k-t/0-9/;
4216: $txt=~tr/U-Z/0-5/;
4217: $txt=~tr/u-z/0-5/;
4218: $txt=~s/\D//g;
4219: return int($txt);
4220: }
4221:
4222: sub latest_rnd_algorithm_id {
4223: return '64bit';
4224: }
4225:
4226: sub rndseed {
4227: my ($symb,$courseid,$domain,$username)=@_;
4228:
4229: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
4230: if (!$symb) {
4231: unless ($symb=$wsymb) { return time; }
4232: }
4233: if (!$courseid) { $courseid=$wcourseid; }
4234: if (!$domain) { $domain=$wdomain; }
4235: if (!$username) { $username=$wusername }
4236: my $which=$ENV{"course.$courseid.rndseed"};
4237: my $CODE=$ENV{'scantron.CODE'};
4238: if (defined($CODE)) {
4239: &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
4240: } elsif ($which eq '64bit') {
4241: return &rndseed_64bit($symb,$courseid,$domain,$username);
4242: }
4243: return &rndseed_32bit($symb,$courseid,$domain,$username);
4244: }
4245:
4246: sub rndseed_32bit {
4247: my ($symb,$courseid,$domain,$username)=@_;
4248: {
4249: use integer;
4250: my $symbchck=unpack("%32C*",$symb) << 27;
4251: my $symbseed=numval($symb) << 22;
4252: my $namechck=unpack("%32C*",$username) << 17;
4253: my $nameseed=numval($username) << 12;
4254: my $domainseed=unpack("%32C*",$domain) << 7;
4255: my $courseseed=unpack("%32C*",$courseid);
4256: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4257: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4258: #&Apache::lonxml::debug("rndseed :$num:$symb");
4259: return $num;
4260: }
4261: }
4262:
4263: sub rndseed_64bit {
4264: my ($symb,$courseid,$domain,$username)=@_;
4265: {
4266: use integer;
4267: my $symbchck=unpack("%32S*",$symb) << 21;
4268: my $symbseed=numval($symb) << 10;
4269: my $namechck=unpack("%32S*",$username);
4270:
4271: my $nameseed=numval($username) << 21;
4272: my $domainseed=unpack("%32S*",$domain) << 10;
4273: my $courseseed=unpack("%32S*",$courseid);
4274:
4275: my $num1=$symbchck+$symbseed+$namechck;
4276: my $num2=$nameseed+$domainseed+$courseseed;
4277: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4278: #&Apache::lonxml::debug("rndseed :$num:$symb");
4279: return "$num1,$num2";
4280: }
4281: }
4282:
4283: sub rndseed_CODE_64bit {
4284: my ($symb,$courseid,$domain,$username)=@_;
4285: {
4286: use integer;
4287: my $symbchck=unpack("%32S*",$symb) << 16;
4288: my $symbseed=numval($symb);
4289: my $CODEseed=numval($ENV{'scantron.CODE'}) << 16;
4290: my $courseseed=unpack("%32S*",$courseid);
4291: my $num1=$symbseed+$CODEseed;
4292: my $num2=$courseseed+$symbchck;
4293: #&Apache::lonxml::debug("$symbseed:$CODEseed|$courseseed:$symbchck");
4294: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
4295: return "$num1,$num2";
4296: }
4297: }
4298:
4299: sub setup_random_from_rndseed {
4300: my ($rndseed)=@_;
4301: if ($rndseed =~/,/) {
4302: my ($num1,$num2)=split(/,/,$rndseed);
4303: &Math::Random::random_set_seed(abs($num1),abs($num2));
4304: } else {
4305: &Math::Random::random_set_seed_from_phrase($rndseed);
4306: }
4307: }
4308:
4309: sub ireceipt {
4310: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
4311: my $cuname=unpack("%32C*",$funame);
4312: my $cudom=unpack("%32C*",$fudom);
4313: my $cucourseid=unpack("%32C*",$fucourseid);
4314: my $cusymb=unpack("%32C*",$fusymb);
4315: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
4316: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
4317: ($cunique%$cuname+
4318: $cunique%$cudom+
4319: $cusymb%$cuname+
4320: $cusymb%$cudom+
4321: $cucourseid%$cuname+
4322: $cucourseid%$cudom);
4323: }
4324:
4325: sub receipt {
4326: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
4327: return &ireceipt($name,$domain,$courseid,$symb);
4328: }
4329:
4330: # ------------------------------------------------------------ Serves up a file
4331: # returns either the contents of the file or a -1
4332: sub getfile {
4333: my $file=shift;
4334: if ($file=~/^\/*uploaded\//) { # user file
4335: my $ua=new LWP::UserAgent;
4336: my $request=new HTTP::Request('GET',&tokenwrapper($file));
4337: my $response=$ua->request($request);
4338: if ($response->is_success()) {
4339: return $response->content;
4340: } else {
4341: return -1;
4342: }
4343: } else { # normal file from res space
4344: &repcopy($file);
4345: if (! -e $file ) { return -1; };
4346: my $fh=Apache::File->new($file);
4347: my $a='';
4348: while (<$fh>) { $a .=$_; }
4349: return $a;
4350: }
4351: }
4352:
4353: sub filelocation {
4354: my ($dir,$file) = @_;
4355: my $location;
4356: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
4357: if ($file=~m:^/~:) { # is a contruction space reference
4358: $location = $file;
4359: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
4360: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
4361: $location=$file;
4362: } else {
4363: $file=~s/^$perlvar{'lonDocRoot'}//;
4364: $file=~s:^/*res::;
4365: if ( !( $file =~ m:^/:) ) {
4366: $location = $dir. '/'.$file;
4367: } else {
4368: $location = '/home/httpd/html/res'.$file;
4369: }
4370: }
4371: $location=~s://+:/:g; # remove duplicate /
4372: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
4373: return $location;
4374: }
4375:
4376: sub hreflocation {
4377: my ($dir,$file)=@_;
4378: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
4379: my $finalpath=filelocation($dir,$file);
4380: $finalpath=~s/^\/home\/httpd\/html//;
4381: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
4382: return $finalpath;
4383: } else {
4384: return $file;
4385: }
4386: }
4387:
4388: # ------------------------------------------------------------- Declutters URLs
4389:
4390: sub declutter {
4391: my $thisfn=shift;
4392: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
4393: $thisfn=~s/^\///;
4394: $thisfn=~s/^res\///;
4395: $thisfn=~s/\?.+$//;
4396: return $thisfn;
4397: }
4398:
4399: # ------------------------------------------------------------- Clutter up URLs
4400:
4401: sub clutter {
4402: my $thisfn='/'.&declutter(shift);
4403: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
4404: $thisfn='/res'.$thisfn;
4405: }
4406: return $thisfn;
4407: }
4408:
4409: # -------------------------------------------------------- Escape Special Chars
4410:
4411: sub escape {
4412: my $str=shift;
4413: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4414: return $str;
4415: }
4416:
4417: # ----------------------------------------------------- Un-Escape Special Chars
4418:
4419: sub unescape {
4420: my $str=shift;
4421: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4422: return $str;
4423: }
4424:
4425: sub mod_perl_version {
4426: if (defined($perlvar{'MODPERL2'})) {
4427: return 2;
4428: }
4429: return 1;
4430: }
4431: # ================================================================ Main Program
4432:
4433: sub goodbye {
4434: &logthis("Starting Shut down");
4435: #not converted to using infrastruture
4436: &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
4437: &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
4438: &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
4439: #converted
4440: &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
4441: &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
4442: #1.1 only
4443: &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
4444: &logthis(sprintf("%-20s is %s",'%usectioncache',scalar(%usectioncache)));
4445: &flushcourselogs();
4446: &logthis("Shutting down");
4447: return DONE;
4448: }
4449:
4450: BEGIN {
4451: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
4452: unless ($readit) {
4453: {
4454: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
4455:
4456: while (my $configline=<$config>) {
4457: if ($configline =~ /^[^\#]*PerlSetVar/) {
4458: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4459: chomp($varvalue);
4460: $perlvar{$varname}=$varvalue;
4461: }
4462: }
4463: }
4464: {
4465: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
4466:
4467: while (my $configline=<$config>) {
4468: if ($configline =~ /^[^\#]*PerlSetVar/) {
4469: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4470: chomp($varvalue);
4471: $perlvar{$varname}=$varvalue;
4472: }
4473: }
4474: }
4475:
4476: # ------------------------------------------------------------ Read domain file
4477: {
4478: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
4479: '/domain.tab');
4480: %domaindescription = ();
4481: %domain_auth_def = ();
4482: %domain_auth_arg_def = ();
4483: if ($fh) {
4484: while (<$fh>) {
4485: next if (/^(\#|\s*$)/);
4486: # next if /^\#/;
4487: chomp;
4488: my ($domain, $domain_description, $def_auth, $def_auth_arg,
4489: $def_lang, $city, $longi, $lati) = split(/:/,$_);
4490: $domain_auth_def{$domain}=$def_auth;
4491: $domain_auth_arg_def{$domain}=$def_auth_arg;
4492: $domaindescription{$domain}=$domain_description;
4493: $domain_lang_def{$domain}=$def_lang;
4494: $domain_city{$domain}=$city;
4495: $domain_longi{$domain}=$longi;
4496: $domain_lati{$domain}=$lati;
4497:
4498: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
4499: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
4500: }
4501: }
4502: }
4503:
4504:
4505: # ------------------------------------------------------------- Read hosts file
4506: {
4507: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
4508:
4509: while (my $configline=<$config>) {
4510: next if ($configline =~ /^(\#|\s*$)/);
4511: chomp($configline);
4512: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
4513: if ($id && $domain && $role && $name && $ip) {
4514: $hostname{$id}=$name;
4515: $hostdom{$id}=$domain;
4516: $hostip{$id}=$ip;
4517: $iphost{$ip}=$id;
4518: if ($role eq 'library') { $libserv{$id}=$name; }
4519: } else {
4520: if ($configline) {
4521: &logthis("Skipping hosts.tab line -$configline-");
4522: }
4523: }
4524: }
4525: }
4526:
4527: # ------------------------------------------------------ Read spare server file
4528: {
4529: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
4530:
4531: while (my $configline=<$config>) {
4532: chomp($configline);
4533: if ($configline) {
4534: $spareid{$configline}=1;
4535: }
4536: }
4537: }
4538: # ------------------------------------------------------------ Read permissions
4539: {
4540: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
4541:
4542: while (my $configline=<$config>) {
4543: chomp($configline);
4544: if ($configline) {
4545: my ($role,$perm)=split(/ /,$configline);
4546: if ($perm ne '') { $pr{$role}=$perm; }
4547: }
4548: }
4549: }
4550:
4551: # -------------------------------------------- Read plain texts for permissions
4552: {
4553: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
4554:
4555: while (my $configline=<$config>) {
4556: chomp($configline);
4557: if ($configline) {
4558: my ($short,$plain)=split(/:/,$configline);
4559: if ($plain ne '') { $prp{$short}=$plain; }
4560: }
4561: }
4562: }
4563:
4564: # ---------------------------------------------------------- Read package table
4565: {
4566: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
4567:
4568: while (my $configline=<$config>) {
4569: chomp($configline);
4570: my ($short,$plain)=split(/:/,$configline);
4571: my ($pack,$name)=split(/\&/,$short);
4572: if ($plain ne '') {
4573: $packagetab{$pack.'&'.$name.'&name'}=$name;
4574: $packagetab{$short}=$plain;
4575: }
4576: }
4577: }
4578:
4579: # ------------- set up temporary directory
4580: {
4581: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
4582:
4583: }
4584:
4585: %metacache=();
4586:
4587: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
4588: $dumpcount=0;
4589:
4590: &logtouch();
4591: &logthis('<font color=yellow>INFO: Read configuration</font>');
4592: $readit=1;
4593: }
4594: }
4595:
4596: 1;
4597: __END__
4598:
4599: =pod
4600:
4601: =head1 NAME
4602:
4603: Apache::lonnet - Subroutines to ask questions about things in the network.
4604:
4605: =head1 SYNOPSIS
4606:
4607: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
4608:
4609: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
4610:
4611: Common parameters:
4612:
4613: =over 4
4614:
4615: =item *
4616:
4617: $uname : an internal username (if $cname expecting a course Id specifically)
4618:
4619: =item *
4620:
4621: $udom : a domain (if $cdom expecting a course's domain specifically)
4622:
4623: =item *
4624:
4625: $symb : a resource instance identifier
4626:
4627: =item *
4628:
4629: $namespace : the name of a .db file that contains the data needed or
4630: being set.
4631:
4632: =back
4633:
4634: =head1 OVERVIEW
4635:
4636: lonnet provides subroutines which interact with the
4637: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
4638: about classes, users, and resources.
4639:
4640: For many of these objects you can also use this to store data about
4641: them or modify them in various ways.
4642:
4643: =head2 Symbs
4644:
4645: To identify a specific instance of a resource, LON-CAPA uses symbols
4646: or "symbs"X<symb>. These identifiers are built from the URL of the
4647: map, the resource number of the resource in the map, and the URL of
4648: the resource itself. The latter is somewhat redundant, but might help
4649: if maps change.
4650:
4651: An example is
4652:
4653: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
4654:
4655: The respective map entry is
4656:
4657: <resource id="19" src="/res/msu/korte/tests/part12.problem"
4658: title="Problem 2">
4659: </resource>
4660:
4661: Symbs are used by the random number generator, as well as to store and
4662: restore data specific to a certain instance of for example a problem.
4663:
4664: =head2 Storing And Retrieving Data
4665:
4666: X<store()>X<cstore()>X<restore()>Three of the most important functions
4667: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
4668: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
4669: is is the non-critical message twin of cstore. These functions are for
4670: handlers to store a perl hash to a user's permanent data space in an
4671: easy manner, and to retrieve it again on another call. It is expected
4672: that a handler would use this once at the beginning to retrieve data,
4673: and then again once at the end to send only the new data back.
4674:
4675: The data is stored in the user's data directory on the user's
4676: homeserver under the ID of the course.
4677:
4678: The hash that is returned by restore will have all of the previous
4679: value for all of the elements of the hash.
4680:
4681: Example:
4682:
4683: #creating a hash
4684: my %hash;
4685: $hash{'foo'}='bar';
4686:
4687: #storing it
4688: &Apache::lonnet::cstore(\%hash);
4689:
4690: #changing a value
4691: $hash{'foo'}='notbar';
4692:
4693: #adding a new value
4694: $hash{'bar'}='foo';
4695: &Apache::lonnet::cstore(\%hash);
4696:
4697: #retrieving the hash
4698: my %history=&Apache::lonnet::restore();
4699:
4700: #print the hash
4701: foreach my $key (sort(keys(%history))) {
4702: print("\%history{$key} = $history{$key}");
4703: }
4704:
4705: Will print out:
4706:
4707: %history{1:foo} = bar
4708: %history{1:keys} = foo:timestamp
4709: %history{1:timestamp} = 990455579
4710: %history{2:bar} = foo
4711: %history{2:foo} = notbar
4712: %history{2:keys} = foo:bar:timestamp
4713: %history{2:timestamp} = 990455580
4714: %history{bar} = foo
4715: %history{foo} = notbar
4716: %history{timestamp} = 990455580
4717: %history{version} = 2
4718:
4719: Note that the special hash entries C<keys>, C<version> and
4720: C<timestamp> were added to the hash. C<version> will be equal to the
4721: total number of versions of the data that have been stored. The
4722: C<timestamp> attribute will be the UNIX time the hash was
4723: stored. C<keys> is available in every historical section to list which
4724: keys were added or changed at a specific historical revision of a
4725: hash.
4726:
4727: B<Warning>: do not store the hash that restore returns directly. This
4728: will cause a mess since it will restore the historical keys as if the
4729: were new keys. I.E. 1:foo will become 1:1:foo etc.
4730:
4731: Calling convention:
4732:
4733: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
4734: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
4735:
4736: For more detailed information, see lonnet specific documentation.
4737:
4738: =head1 RETURN MESSAGES
4739:
4740: =over 4
4741:
4742: =item * B<con_lost>: unable to contact remote host
4743:
4744: =item * B<con_delayed>: unable to contact remote host, message will be delivered
4745: when the connection is brought back up
4746:
4747: =item * B<con_failed>: unable to contact remote host and unable to save message
4748: for later delivery
4749:
4750: =item * B<error:>: an error a occured, a description of the error follows the :
4751:
4752: =item * B<no_such_host>: unable to fund a host associated with the user/domain
4753: that was requested
4754:
4755: =back
4756:
4757: =head1 PUBLIC SUBROUTINES
4758:
4759: =head2 Session Environment Functions
4760:
4761: =over 4
4762:
4763: =item *
4764: X<appenv()>
4765: B<appenv(%hash)>: the value of %hash is written to
4766: the user envirnoment file, and will be restored for each access this
4767: user makes during this session, also modifies the %ENV for the current
4768: process
4769:
4770: =item *
4771: X<delenv()>
4772: B<delenv($regexp)>: removes all items from the session
4773: environment file that matches the regular expression in $regexp. The
4774: values are also delted from the current processes %ENV.
4775:
4776: =back
4777:
4778: =head2 User Information
4779:
4780: =over 4
4781:
4782: =item *
4783: X<queryauthenticate()>
4784: B<queryauthenticate($uname,$udom)>: try to determine user's current
4785: authentication scheme
4786:
4787: =item *
4788: X<authenticate()>
4789: B<authenticate($uname,$upass,$udom)>: try to
4790: authenticate user from domain's lib servers (first use the current
4791: one). C<$upass> should be the users password.
4792:
4793: =item *
4794: X<homeserver()>
4795: B<homeserver($uname,$udom)>: find the server which has
4796: the user's directory and files (there must be only one), this caches
4797: the answer, and also caches if there is a borken connection.
4798:
4799: =item *
4800: X<idget()>
4801: B<idget($udom,@ids)>: find the usernames behind a list of IDs
4802: (IDs are a unique resource in a domain, there must be only 1 ID per
4803: username, and only 1 username per ID in a specific domain) (returns
4804: hash: id=>name,id=>name)
4805:
4806: =item *
4807: X<idrget()>
4808: B<idrget($udom,@unames)>: find the IDs behind a list of
4809: usernames (returns hash: name=>id,name=>id)
4810:
4811: =item *
4812: X<idput()>
4813: B<idput($udom,%ids)>: store away a list of names and associated IDs
4814:
4815: =item *
4816: X<rolesinit()>
4817: B<rolesinit($udom,$username,$authhost)>: get user privileges
4818:
4819: =item *
4820: X<usection()>
4821: B<usection($udom,$uname,$cname)>: finds the section of student in the
4822: course $cname, return section name/number or '' for "not in course"
4823: and '-1' for "no section"
4824:
4825: =item *
4826: X<userenvironment()>
4827: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
4828: passed in @what from the requested user's environment, returns a hash
4829:
4830: =back
4831:
4832: =head2 User Roles
4833:
4834: =over 4
4835:
4836: =item *
4837:
4838: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
4839: actions
4840: F: full access
4841: U,I,K: authentication modes (cxx only)
4842: '': forbidden
4843: 1: user needs to choose course
4844: 2: browse allowed
4845:
4846: =item *
4847:
4848: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4849: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4850: and course level
4851:
4852: =item *
4853:
4854: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4855: explanation of a user role term
4856:
4857: =back
4858:
4859: =head2 User Modification
4860:
4861: =over 4
4862:
4863: =item *
4864:
4865: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4866: user for the level given by URL. Optional start and end dates (leave empty
4867: string or zero for "no date")
4868:
4869: =item *
4870:
4871: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4872: change a users, password, possible return values are: ok,
4873: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4874: refused
4875:
4876: =item *
4877:
4878: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
4879:
4880: =item *
4881:
4882: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4883: modify user
4884:
4885: =item *
4886:
4887: modifystudent
4888:
4889: modify a students enrollment and identification information.
4890: The course id is resolved based on the current users environment.
4891: This means the envoking user must be a course coordinator or otherwise
4892: associated with a course.
4893:
4894: This call is essentially a wrapper for lonnet::modifyuser and
4895: lonnet::modify_student_enrollment
4896:
4897: Inputs:
4898:
4899: =over 4
4900:
4901: =item B<$udom> Students loncapa domain
4902:
4903: =item B<$uname> Students loncapa login name
4904:
4905: =item B<$uid> Students id/student number
4906:
4907: =item B<$umode> Students authentication mode
4908:
4909: =item B<$upass> Students password
4910:
4911: =item B<$first> Students first name
4912:
4913: =item B<$middle> Students middle name
4914:
4915: =item B<$last> Students last name
4916:
4917: =item B<$gene> Students generation
4918:
4919: =item B<$usec> Students section in course
4920:
4921: =item B<$end> Unix time of the roles expiration
4922:
4923: =item B<$start> Unix time of the roles start date
4924:
4925: =item B<$forceid> If defined, allow $uid to be changed
4926:
4927: =item B<$desiredhome> server to use as home server for student
4928:
4929: =back
4930:
4931: =item *
4932:
4933: modify_student_enrollment
4934:
4935: Change a students enrollment status in a class. The environment variable
4936: 'role.request.course' must be defined for this function to proceed.
4937:
4938: Inputs:
4939:
4940: =over 4
4941:
4942: =item $udom, students domain
4943:
4944: =item $uname, students name
4945:
4946: =item $uid, students user id
4947:
4948: =item $first, students first name
4949:
4950: =item $middle
4951:
4952: =item $last
4953:
4954: =item $gene
4955:
4956: =item $usec
4957:
4958: =item $end
4959:
4960: =item $start
4961:
4962: =back
4963:
4964:
4965: =item *
4966:
4967: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4968: custom role; give a custom role to a user for the level given by URL. Specify
4969: name and domain of role author, and role name
4970:
4971: =item *
4972:
4973: revokerole($udom,$uname,$url,$role) : revoke a role for url
4974:
4975: =item *
4976:
4977: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4978:
4979: =back
4980:
4981: =head2 Course Infomation
4982:
4983: =over 4
4984:
4985: =item *
4986:
4987: coursedescription($courseid) : course description
4988:
4989: =item *
4990:
4991: courseresdata($coursenum,$coursedomain,@which) : request for current
4992: parameter setting for a specific course, @what should be a list of
4993: parameters to ask about. This routine caches answers for 5 minutes.
4994:
4995: =back
4996:
4997: =head2 Course Modification
4998:
4999: =over 4
5000:
5001: =item *
5002:
5003: writecoursepref($courseid,%prefs) : write preferences (environment
5004: database) for a course
5005:
5006: =item *
5007:
5008: createcourse($udom,$description,$url) : make/modify course
5009:
5010: =back
5011:
5012: =head2 Resource Subroutines
5013:
5014: =over 4
5015:
5016: =item *
5017:
5018: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
5019:
5020: =item *
5021:
5022: repcopy($filename) : subscribes to the requested file, and attempts to
5023: replicate from the owning library server, Might return
5024: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
5025: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
5026: resource. Expects the local filesystem pathname
5027: (/home/httpd/html/res/....)
5028:
5029: =back
5030:
5031: =head2 Resource Information
5032:
5033: =over 4
5034:
5035: =item *
5036:
5037: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
5038: a vairety of different possible values, $varname should be a request
5039: string, and the other parameters can be used to specify who and what
5040: one is asking about.
5041:
5042: Possible values for $varname are environment.lastname (or other item
5043: from the envirnment hash), user.name (or someother aspect about the
5044: user), resource.0.maxtries (or some other part and parameter of a
5045: resource)
5046:
5047: =item *
5048:
5049: directcondval($number) : get current value of a condition; reads from a state
5050: string
5051:
5052: =item *
5053:
5054: condval($condidx) : value of condition index based on state
5055:
5056: =item *
5057:
5058: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
5059: resource's metadata, $what should be either a specific key, or either
5060: 'keys' (to get a list of possible keys) or 'packages' to get a list of
5061: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
5062:
5063: this function automatically caches all requests
5064:
5065: =item *
5066:
5067: metadata_query($query,$custom,$customshow) : make a metadata query against the
5068: network of library servers; returns file handle of where SQL and regex results
5069: will be stored for query
5070:
5071: =item *
5072:
5073: symbread($filename) : return symbolic list entry (filename argument optional);
5074: returns the data handle
5075:
5076: =item *
5077:
5078: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
5079: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
5080: failure, user must be in a course, as it assumes the existance of the
5081: course initi hash, and uses $ENV('request.course.id'}
5082:
5083:
5084: =item *
5085:
5086: symbclean($symb) : removes versions numbers from a symb, returns the
5087: cleaned symb
5088:
5089: =item *
5090:
5091: is_on_map($uri) : checks if the $uri is somewhere on the current
5092: course map, user must be in a course for it to work.
5093:
5094: =item *
5095:
5096: numval($salt) : return random seed value (addend for rndseed)
5097:
5098: =item *
5099:
5100: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
5101: a random seed, all arguments are optional, if they aren't sent it uses the
5102: environment to derive them. Note: if symb isn't sent and it can't get one
5103: from &symbread it will use the current time as its return value
5104:
5105: =item *
5106:
5107: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
5108: unfakeable, receipt
5109:
5110: =item *
5111:
5112: receipt() : API to ireceipt working off of ENV values; given out to users
5113:
5114: =item *
5115:
5116: countacc($url) : count the number of accesses to a given URL
5117:
5118: =item *
5119:
5120: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
5121:
5122: =item *
5123:
5124: checkin($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 $tcrsid)
5125:
5126: =item *
5127:
5128: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
5129:
5130: =item *
5131:
5132: devalidate($symb) : devalidate temporary spreadsheet calculations,
5133: forcing spreadsheet to reevaluate the resource scores next time.
5134:
5135: =back
5136:
5137: =head2 Storing/Retreiving Data
5138:
5139: =over 4
5140:
5141: =item *
5142:
5143: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
5144: for this url; hashref needs to be given and should be a \%hashname; the
5145: remaining args aren't required and if they aren't passed or are '' they will
5146: be derived from the ENV
5147:
5148: =item *
5149:
5150: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
5151: uses critical subroutine
5152:
5153: =item *
5154:
5155: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
5156: all args are optional
5157:
5158: =item *
5159:
5160: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
5161: works very similar to store/cstore, but all data is stored in a
5162: temporary location and can be reset using tmpreset, $storehash should
5163: be a hash reference, returns nothing on success
5164:
5165: =item *
5166:
5167: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
5168: similar to restore, but all data is stored in a temporary location and
5169: can be reset using tmpreset. Returns a hash of values on success,
5170: error string otherwise.
5171:
5172: =item *
5173:
5174: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
5175: deltes all keys for $symb form the temporary storage hash.
5176:
5177: =item *
5178:
5179: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5180: reference filled in from namesp ($udom and $uname are optional)
5181:
5182: =item *
5183:
5184: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
5185: namesp ($udom and $uname are optional)
5186:
5187: =item *
5188:
5189: dump($namespace,$udom,$uname,$regexp) :
5190: dumps the complete (or key matching regexp) namespace into a hash
5191: ($udom, $uname and $regexp are optional)
5192:
5193: =item *
5194:
5195: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
5196: ($udom and $uname are optional)
5197:
5198: =item *
5199:
5200: cput($namespace,$storehash,$udom,$uname) : critical put
5201: ($udom and $uname are optional)
5202:
5203: =item *
5204:
5205: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5206: reference filled in from namesp (encrypts the return communication)
5207: ($udom and $uname are optional)
5208:
5209: =item *
5210:
5211: log($udom,$name,$home,$message) : write to permanent log for user; use
5212: critical subroutine
5213:
5214: =back
5215:
5216: =head2 Network Status Functions
5217:
5218: =over 4
5219:
5220: =item *
5221:
5222: dirlist($uri) : return directory list based on URI
5223:
5224: =item *
5225:
5226: spareserver() : find server with least workload from spare.tab
5227:
5228: =back
5229:
5230: =head2 Apache Request
5231:
5232: =over 4
5233:
5234: =item *
5235:
5236: ssi($url,%hash) : server side include, does a complete request cycle on url to
5237: localhost, posts hash
5238:
5239: =back
5240:
5241: =head2 Data to String to Data
5242:
5243: =over 4
5244:
5245: =item *
5246:
5247: hash2str(%hash) : convert a hash into a string complete with escaping and '='
5248: and '&' separators, supports elements that are arrayrefs and hashrefs
5249:
5250: =item *
5251:
5252: hashref2str($hashref) : convert a hashref into a string complete with
5253: escaping and '=' and '&' separators, supports elements that are
5254: arrayrefs and hashrefs
5255:
5256: =item *
5257:
5258: arrayref2str($arrayref) : convert an arrayref into a string complete
5259: with escaping and '&' separators, supports elements that are arrayrefs
5260: and hashrefs
5261:
5262: =item *
5263:
5264: str2hash($string) : convert string to hash using unescaping and
5265: splitting on '=' and '&', supports elements that are arrayrefs and
5266: hashrefs
5267:
5268: =item *
5269:
5270: str2array($string) : convert string to hash using unescaping and
5271: splitting on '&', supports elements that are arrayrefs and hashrefs
5272:
5273: =back
5274:
5275: =head2 Logging Routines
5276:
5277: =over 4
5278:
5279: These routines allow one to make log messages in the lonnet.log and
5280: lonnet.perm logfiles.
5281:
5282: =item *
5283:
5284: logtouch() : make sure the logfile, lonnet.log, exists
5285:
5286: =item *
5287:
5288: logthis() : append message to the normal lonnet.log file, it gets
5289: preiodically rolled over and deleted.
5290:
5291: =item *
5292:
5293: logperm() : append a permanent message to lonnet.perm.log, this log
5294: file never gets deleted by any automated portion of the system, only
5295: messages of critical importance should go in here.
5296:
5297: =back
5298:
5299: =head2 General File Helper Routines
5300:
5301: =over 4
5302:
5303: =item *
5304:
5305: getfile($file) : returns the entire contents of a file or -1; it
5306: properly subscribes to and replicates the file if neccessary.
5307:
5308: =item *
5309:
5310: filelocation($dir,$file) : returns file system location of a file
5311: based on URI; meant to be "fairly clean" absolute reference, $dir is a
5312: directory that relative $file lookups are to looked in ($dir of /a/dir
5313: and a file of ../bob will become /a/bob)
5314:
5315: =item *
5316:
5317: hreflocation($dir,$file) : returns file system location or a URL; same as
5318: filelocation except for hrefs
5319:
5320: =item *
5321:
5322: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
5323:
5324: =back
5325:
5326: =head2 HTTP Helper Routines
5327:
5328: =over 4
5329:
5330: =item *
5331:
5332: escape() : unpack non-word characters into CGI-compatible hex codes
5333:
5334: =item *
5335:
5336: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
5337:
5338: =back
5339:
5340: =head1 PRIVATE SUBROUTINES
5341:
5342: =head2 Underlying communication routines (Shouldn't call)
5343:
5344: =over 4
5345:
5346: =item *
5347:
5348: subreply() : tries to pass a message to lonc, returns con_lost if incapable
5349:
5350: =item *
5351:
5352: reply() : uses subreply to send a message to remote machine, logs all failures
5353:
5354: =item *
5355:
5356: critical() : passes a critical message to another server; if cannot
5357: get through then place message in connection buffer directory and
5358: returns con_delayed, if incapable of saving message, returns
5359: con_failed
5360:
5361: =item *
5362:
5363: reconlonc() : tries to reconnect lonc client processes.
5364:
5365: =back
5366:
5367: =head2 Resource Access Logging
5368:
5369: =over 4
5370:
5371: =item *
5372:
5373: flushcourselogs() : flush (save) buffer logs and access logs
5374:
5375: =item *
5376:
5377: courselog($what) : save message for course in hash
5378:
5379: =item *
5380:
5381: courseacclog($what) : save message for course using &courselog(). Perform
5382: special processing for specific resource types (problems, exams, quizzes, etc).
5383:
5384: =item *
5385:
5386: goodbye() : flush course logs and log shutting down; it is called in srm.conf
5387: as a PerlChildExitHandler
5388:
5389: =back
5390:
5391: =head2 Other
5392:
5393: =over 4
5394:
5395: =item *
5396:
5397: symblist($mapname,%newhash) : update symbolic storage links
5398:
5399: =back
5400:
5401: =cut
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