File:
[LON-CAPA] /
loncom /
lonnet /
perl /
lonnet.pm
Revision
1.567:
download - view:
text,
annotated -
select for diffs
Wed Nov 10 19:03:04 2004 UTC (19 years, 9 months ago) by
raeburn
Branches:
MAIN
CVS tags:
HEAD
Extract some of the functionality of rolesinit() into separate subroutines to allow calling of subsets of rolesinit functionality. Also some compaction of code intended to keep the style police content.
1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.567 2004/11/10 19:03:04 raeburn 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: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
39: %libserv %pr %prp %metacache %packagetab %titlecache %courseresversioncache %resversioncache
40: %courselogs %accesshash %userrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseresdatacache
42: %userresdatacache %getsectioncache %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir $_64bit);
44:
45: use IO::Socket;
46: use GDBM_File;
47: use Apache::Constants qw(:common :http);
48: use HTML::LCParser;
49: use Fcntl qw(:flock);
50: use Apache::lonlocal;
51: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
52: use Time::HiRes qw( gettimeofday tv_interval );
53: my $readit;
54: my $max_connection_retries = 10; # Or some such value.
55:
56: =pod
57:
58: =head1 Package Variables
59:
60: These are largely undocumented, so if you decipher one please note it here.
61:
62: =over 4
63:
64: =item $processmarker
65:
66: Contains the time this process was started and this servers host id.
67:
68: =item $dumpcount
69:
70: Counts the number of times a message log flush has been attempted (regardless
71: of success) by this process. Used as part of the filename when messages are
72: delayed.
73:
74: =back
75:
76: =cut
77:
78:
79: # --------------------------------------------------------------------- Logging
80:
81: sub logtouch {
82: my $execdir=$perlvar{'lonDaemons'};
83: unless (-e "$execdir/logs/lonnet.log") {
84: open(my $fh,">>$execdir/logs/lonnet.log");
85: close $fh;
86: }
87: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
88: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
89: }
90:
91: sub logthis {
92: my $message=shift;
93: my $execdir=$perlvar{'lonDaemons'};
94: my $now=time;
95: my $local=localtime($now);
96: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
97: print $fh "$local ($$): $message\n";
98: close($fh);
99: }
100: return 1;
101: }
102:
103: sub logperm {
104: my $message=shift;
105: my $execdir=$perlvar{'lonDaemons'};
106: my $now=time;
107: my $local=localtime($now);
108: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
109: print $fh "$now:$message:$local\n";
110: close($fh);
111: }
112: return 1;
113: }
114:
115: # -------------------------------------------------- Non-critical communication
116: sub subreply {
117: my ($cmd,$server)=@_;
118: my $peerfile="$perlvar{'lonSockDir'}/$server";
119: #
120: # With loncnew process trimming, there's a timing hole between lonc server
121: # process exit and the master server picking up the listen on the AF_UNIX
122: # socket. In that time interval, a lock file will exist:
123:
124: my $lockfile=$peerfile.".lock";
125: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
126: sleep(1);
127: }
128: # At this point, either a loncnew parent is listening or an old lonc
129: # or loncnew child is listening so we can connect or everything's dead.
130: #
131: # We'll give the connection a few tries before abandoning it. If
132: # connection is not possible, we'll con_lost back to the client.
133: #
134: my $client;
135: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
136: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
137: Type => SOCK_STREAM,
138: Timeout => 10);
139: if($client) {
140: last; # Connected!
141: }
142: sleep(1); # Try again later if failed connection.
143: }
144: my $answer;
145: if ($client) {
146: print $client "$cmd\n";
147: $answer=<$client>;
148: if (!$answer) { $answer="con_lost"; }
149: chomp($answer);
150: } else {
151: $answer = 'con_lost'; # Failed connection.
152: }
153: return $answer;
154: }
155:
156: sub reply {
157: my ($cmd,$server)=@_;
158: unless (defined($hostname{$server})) { return 'no_such_host'; }
159: my $answer=subreply($cmd,$server);
160: if ($answer eq 'con_lost') {
161: #sleep 5;
162: #$answer=subreply($cmd,$server);
163: #if ($answer eq 'con_lost') {
164: # &logthis("Second attempt con_lost on $server");
165: # my $peerfile="$perlvar{'lonSockDir'}/$server";
166: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
167: # Type => SOCK_STREAM,
168: # Timeout => 10)
169: # or return "con_lost";
170: # &logthis("Killing socket");
171: # print $client "close_connection_exit\n";
172: #sleep 5;
173: # $answer=subreply($cmd,$server);
174: #}
175: }
176: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
177: &logthis("<font color=blue>WARNING:".
178: " $cmd to $server returned $answer</font>");
179: }
180: return $answer;
181: }
182:
183: # ----------------------------------------------------------- Send USR1 to lonc
184:
185: sub reconlonc {
186: my $peerfile=shift;
187: &logthis("Trying to reconnect for $peerfile");
188: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
189: if (open(my $fh,"<$loncfile")) {
190: my $loncpid=<$fh>;
191: chomp($loncpid);
192: if (kill 0 => $loncpid) {
193: &logthis("lonc at pid $loncpid responding, sending USR1");
194: kill USR1 => $loncpid;
195: sleep 1;
196: if (-e "$peerfile") { return; }
197: &logthis("$peerfile still not there, give it another try");
198: sleep 5;
199: if (-e "$peerfile") { return; }
200: &logthis(
201: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
202: } else {
203: &logthis(
204: "<font color=blue>WARNING:".
205: " lonc at pid $loncpid not responding, giving up</font>");
206: }
207: } else {
208: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
209: }
210: }
211:
212: # ------------------------------------------------------ Critical communication
213:
214: sub critical {
215: my ($cmd,$server)=@_;
216: unless ($hostname{$server}) {
217: &logthis("<font color=blue>WARNING:".
218: " Critical message to unknown server ($server)</font>");
219: return 'no_such_host';
220: }
221: my $answer=reply($cmd,$server);
222: if ($answer eq 'con_lost') {
223: my $pingreply=reply('ping',$server);
224: &reconlonc("$perlvar{'lonSockDir'}/$server");
225: my $pongreply=reply('pong',$server);
226: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
227: $answer=reply($cmd,$server);
228: if ($answer eq 'con_lost') {
229: my $now=time;
230: my $middlename=$cmd;
231: $middlename=substr($middlename,0,16);
232: $middlename=~s/\W//g;
233: my $dfilename=
234: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
235: $dumpcount++;
236: {
237: my $dfh;
238: if (open($dfh,">$dfilename")) {
239: print $dfh "$cmd\n";
240: close($dfh);
241: }
242: }
243: sleep 2;
244: my $wcmd='';
245: {
246: my $dfh;
247: if (open($dfh,"<$dfilename")) {
248: $wcmd=<$dfh>;
249: close($dfh);
250: }
251: }
252: chomp($wcmd);
253: if ($wcmd eq $cmd) {
254: &logthis("<font color=blue>WARNING: ".
255: "Connection buffer $dfilename: $cmd</font>");
256: &logperm("D:$server:$cmd");
257: return 'con_delayed';
258: } else {
259: &logthis("<font color=red>CRITICAL:"
260: ." Critical connection failed: $server $cmd</font>");
261: &logperm("F:$server:$cmd");
262: return 'con_failed';
263: }
264: }
265: }
266: return $answer;
267: }
268:
269: #
270: # -------------- Remove all key from the env that start witha lowercase letter
271: # (Which is always a lon-capa value)
272:
273: sub cleanenv {
274: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
275: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
276: foreach my $key (keys(%ENV)) {
277: if ($key =~ /^[a-z]/) {
278: delete($ENV{$key});
279: }
280: }
281: }
282:
283: # ------------------------------------------- Transfer profile into environment
284:
285: sub transfer_profile_to_env {
286: my ($lonidsdir,$handle)=@_;
287: my @profile;
288: {
289: open(my $idf,"$lonidsdir/$handle.id");
290: flock($idf,LOCK_SH);
291: @profile=<$idf>;
292: close($idf);
293: }
294: my $envi;
295: my %Remove;
296: for ($envi=0;$envi<=$#profile;$envi++) {
297: chomp($profile[$envi]);
298: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
299: $ENV{$envname} = $envvalue;
300: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
301: if ($time < time-300) {
302: $Remove{$key}++;
303: }
304: }
305: }
306: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
307: foreach my $expired_key (keys(%Remove)) {
308: &delenv($expired_key);
309: }
310: }
311:
312: # ---------------------------------------------------------- Append Environment
313:
314: sub appenv {
315: my %newenv=@_;
316: foreach (keys %newenv) {
317: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
318: &logthis("<font color=blue>WARNING: ".
319: "Attempt to modify environment ".$_." to ".$newenv{$_}
320: .'</font>');
321: delete($newenv{$_});
322: } else {
323: $ENV{$_}=$newenv{$_};
324: }
325: }
326:
327: my $lockfh;
328: unless (open($lockfh,"$ENV{'user.environment'}")) {
329: return 'error: '.$!;
330: }
331: unless (flock($lockfh,LOCK_EX)) {
332: &logthis("<font color=blue>WARNING: ".
333: 'Could not obtain exclusive lock in appenv: '.$!);
334: close($lockfh);
335: return 'error: '.$!;
336: }
337:
338: my @oldenv;
339: {
340: my $fh;
341: unless (open($fh,"$ENV{'user.environment'}")) {
342: return 'error: '.$!;
343: }
344: @oldenv=<$fh>;
345: close($fh);
346: }
347: for (my $i=0; $i<=$#oldenv; $i++) {
348: chomp($oldenv[$i]);
349: if ($oldenv[$i] ne '') {
350: my ($name,$value)=split(/=/,$oldenv[$i]);
351: unless (defined($newenv{$name})) {
352: $newenv{$name}=$value;
353: }
354: }
355: }
356: {
357: my $fh;
358: unless (open($fh,">$ENV{'user.environment'}")) {
359: return 'error';
360: }
361: my $newname;
362: foreach $newname (keys %newenv) {
363: print $fh "$newname=$newenv{$newname}\n";
364: }
365: close($fh);
366: }
367:
368: close($lockfh);
369: return 'ok';
370: }
371: # ----------------------------------------------------- Delete from Environment
372:
373: sub delenv {
374: my $delthis=shift;
375: my %newenv=();
376: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
377: &logthis("<font color=blue>WARNING: ".
378: "Attempt to delete from environment ".$delthis);
379: return 'error';
380: }
381: my @oldenv;
382: {
383: my $fh;
384: unless (open($fh,"$ENV{'user.environment'}")) {
385: return 'error';
386: }
387: unless (flock($fh,LOCK_SH)) {
388: &logthis("<font color=blue>WARNING: ".
389: 'Could not obtain shared lock in delenv: '.$!);
390: close($fh);
391: return 'error: '.$!;
392: }
393: @oldenv=<$fh>;
394: close($fh);
395: }
396: {
397: my $fh;
398: unless (open($fh,">$ENV{'user.environment'}")) {
399: return 'error';
400: }
401: unless (flock($fh,LOCK_EX)) {
402: &logthis("<font color=blue>WARNING: ".
403: 'Could not obtain exclusive lock in delenv: '.$!);
404: close($fh);
405: return 'error: '.$!;
406: }
407: foreach (@oldenv) {
408: if ($_=~/^$delthis/) {
409: my ($key,undef) = split('=',$_);
410: delete($ENV{$key});
411: } else {
412: print $fh $_;
413: }
414: }
415: close($fh);
416: }
417: return 'ok';
418: }
419:
420: # ------------------------------------------ Find out current server userload
421: # there is a copy in lond
422: sub userload {
423: my $numusers=0;
424: {
425: opendir(LONIDS,$perlvar{'lonIDsDir'});
426: my $filename;
427: my $curtime=time;
428: while ($filename=readdir(LONIDS)) {
429: if ($filename eq '.' || $filename eq '..') {next;}
430: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
431: if ($curtime-$mtime < 1800) { $numusers++; }
432: }
433: closedir(LONIDS);
434: }
435: my $userloadpercent=0;
436: my $maxuserload=$perlvar{'lonUserLoadLim'};
437: if ($maxuserload) {
438: $userloadpercent=100*$numusers/$maxuserload;
439: }
440: $userloadpercent=sprintf("%.2f",$userloadpercent);
441: return $userloadpercent;
442: }
443:
444: # ------------------------------------------ Fight off request when overloaded
445:
446: sub overloaderror {
447: my ($r,$checkserver)=@_;
448: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
449: my $loadavg;
450: if ($checkserver eq $perlvar{'lonHostID'}) {
451: open(my $loadfile,'/proc/loadavg');
452: $loadavg=<$loadfile>;
453: $loadavg =~ s/\s.*//g;
454: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
455: close($loadfile);
456: } else {
457: $loadavg=&reply('load',$checkserver);
458: }
459: my $overload=$loadavg-100;
460: if ($overload>0) {
461: $r->err_headers_out->{'Retry-After'}=$overload;
462: $r->log_error('Overload of '.$overload.' on '.$checkserver);
463: return 413;
464: }
465: return '';
466: }
467:
468: # ------------------------------ Find server with least workload from spare.tab
469:
470: sub spareserver {
471: my ($loadpercent,$userloadpercent) = @_;
472: my $tryserver;
473: my $spareserver='';
474: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
475: my $lowestserver=$loadpercent > $userloadpercent?
476: $loadpercent : $userloadpercent;
477: foreach $tryserver (keys %spareid) {
478: my $loadans=reply('load',$tryserver);
479: my $userloadans=reply('userload',$tryserver);
480: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
481: next; #didn't get a number from the server
482: }
483: my $answer;
484: if ($loadans =~ /\d/) {
485: if ($userloadans =~ /\d/) {
486: #both are numbers, pick the bigger one
487: $answer=$loadans > $userloadans?
488: $loadans : $userloadans;
489: } else {
490: $answer = $loadans;
491: }
492: } else {
493: $answer = $userloadans;
494: }
495: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
496: $spareserver="http://$hostname{$tryserver}";
497: $lowestserver=$answer;
498: }
499: }
500: return $spareserver;
501: }
502:
503: # --------------------------------------------- Try to change a user's password
504:
505: sub changepass {
506: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
507: $currentpass = &escape($currentpass);
508: $newpass = &escape($newpass);
509: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
510: $server);
511: if (! $answer) {
512: &logthis("No reply on password change request to $server ".
513: "by $uname in domain $udom.");
514: } elsif ($answer =~ "^ok") {
515: &logthis("$uname in $udom successfully changed their password ".
516: "on $server.");
517: } elsif ($answer =~ "^pwchange_failure") {
518: &logthis("$uname in $udom was unable to change their password ".
519: "on $server. The action was blocked by either lcpasswd ".
520: "or pwchange");
521: } elsif ($answer =~ "^non_authorized") {
522: &logthis("$uname in $udom did not get their password correct when ".
523: "attempting to change it on $server.");
524: } elsif ($answer =~ "^auth_mode_error") {
525: &logthis("$uname in $udom attempted to change their password despite ".
526: "not being locally or internally authenticated on $server.");
527: } elsif ($answer =~ "^unknown_user") {
528: &logthis("$uname in $udom attempted to change their password ".
529: "on $server but were unable to because $server is not ".
530: "their home server.");
531: } elsif ($answer =~ "^refused") {
532: &logthis("$server refused to change $uname in $udom password because ".
533: "it was sent an unencrypted request to change the password.");
534: }
535: return $answer;
536: }
537:
538: # ----------------------- Try to determine user's current authentication scheme
539:
540: sub queryauthenticate {
541: my ($uname,$udom)=@_;
542: my $uhome=&homeserver($uname,$udom);
543: if (!$uhome) {
544: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
545: return 'no_host';
546: }
547: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
548: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
549: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
550: }
551: return $answer;
552: }
553:
554: # --------- Try to authenticate user from domain's lib servers (first this one)
555:
556: sub authenticate {
557: my ($uname,$upass,$udom)=@_;
558: $upass=escape($upass);
559: $uname=~s/\W//g;
560: my $uhome=&homeserver($uname,$udom);
561: if (!$uhome) {
562: &logthis("User $uname at $udom is unknown in authenticate");
563: return 'no_host';
564: }
565: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
566: if ($answer eq 'authorized') {
567: &logthis("User $uname at $udom authorized by $uhome");
568: return $uhome;
569: }
570: if ($answer eq 'non_authorized') {
571: &logthis("User $uname at $udom rejected by $uhome");
572: return 'no_host';
573: }
574: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
575: return 'no_host';
576: }
577:
578: # ---------------------- Find the homebase for a user from domain's lib servers
579:
580: sub homeserver {
581: my ($uname,$udom,$ignoreBadCache)=@_;
582: my $index="$uname:$udom";
583:
584: my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
585: if (defined($cached)) { return $result; }
586: my $tryserver;
587: foreach $tryserver (keys %libserv) {
588: next if ($ignoreBadCache ne 'true' &&
589: exists($badServerCache{$tryserver}));
590: if ($hostdom{$tryserver} eq $udom) {
591: my $answer=reply("home:$udom:$uname",$tryserver);
592: if ($answer eq 'found') {
593: return &do_cache(\%homecache,$index,$tryserver,'home');
594: } elsif ($answer eq 'no_host') {
595: $badServerCache{$tryserver}=1;
596: }
597: }
598: }
599: return 'no_host';
600: }
601:
602: # ------------------------------------- Find the usernames behind a list of IDs
603:
604: sub idget {
605: my ($udom,@ids)=@_;
606: my %returnhash=();
607:
608: my $tryserver;
609: foreach $tryserver (keys %libserv) {
610: if ($hostdom{$tryserver} eq $udom) {
611: my $idlist=join('&',@ids);
612: $idlist=~tr/A-Z/a-z/;
613: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
614: my @answer=();
615: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
616: @answer=split(/\&/,$reply);
617: } ;
618: my $i;
619: for ($i=0;$i<=$#ids;$i++) {
620: if ($answer[$i]) {
621: $returnhash{$ids[$i]}=$answer[$i];
622: }
623: }
624: }
625: }
626: return %returnhash;
627: }
628:
629: # ------------------------------------- Find the IDs behind a list of usernames
630:
631: sub idrget {
632: my ($udom,@unames)=@_;
633: my %returnhash=();
634: foreach (@unames) {
635: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
636: }
637: return %returnhash;
638: }
639:
640: # ------------------------------- Store away a list of names and associated IDs
641:
642: sub idput {
643: my ($udom,%ids)=@_;
644: my %servers=();
645: foreach (keys %ids) {
646: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
647: my $uhom=&homeserver($_,$udom);
648: if ($uhom ne 'no_host') {
649: my $id=&escape($ids{$_});
650: $id=~tr/A-Z/a-z/;
651: my $unam=&escape($_);
652: if ($servers{$uhom}) {
653: $servers{$uhom}.='&'.$id.'='.$unam;
654: } else {
655: $servers{$uhom}=$id.'='.$unam;
656: }
657: }
658: }
659: foreach (keys %servers) {
660: &critical('idput:'.$udom.':'.$servers{$_},$_);
661: }
662: }
663:
664: # --------------------------------------------------- Assign a key to a student
665:
666: sub assign_access_key {
667: #
668: # a valid key looks like uname:udom#comments
669: # comments are being appended
670: #
671: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
672: $kdom=
673: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($kdom));
674: $knum=
675: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($knum));
676: $cdom=
677: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
678: $cnum=
679: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
680: $udom=$ENV{'user.name'} unless (defined($udom));
681: $uname=$ENV{'user.domain'} unless (defined($uname));
682: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
683: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
684: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
685: # assigned to this person
686: # - this should not happen,
687: # unless something went wrong
688: # the first time around
689: # ready to assign
690: $logentry=$1.'; '.$logentry;
691: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
692: $kdom,$knum) eq 'ok') {
693: # key now belongs to user
694: my $envkey='key.'.$cdom.'_'.$cnum;
695: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
696: &appenv('environment.'.$envkey => $ckey);
697: return 'ok';
698: } else {
699: return
700: 'error: Count not permanently assign key, will need to be re-entered later.';
701: }
702: } else {
703: return 'error: Could not assign key, try again later.';
704: }
705: } elsif (!$existing{$ckey}) {
706: # the key does not exist
707: return 'error: The key does not exist';
708: } else {
709: # the key is somebody else's
710: return 'error: The key is already in use';
711: }
712: }
713:
714: # ------------------------------------------ put an additional comment on a key
715:
716: sub comment_access_key {
717: #
718: # a valid key looks like uname:udom#comments
719: # comments are being appended
720: #
721: my ($ckey,$cdom,$cnum,$logentry)=@_;
722: $cdom=
723: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
724: $cnum=
725: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
726: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
727: if ($existing{$ckey}) {
728: $existing{$ckey}.='; '.$logentry;
729: # ready to assign
730: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
731: $cdom,$cnum) eq 'ok') {
732: return 'ok';
733: } else {
734: return 'error: Count not store comment.';
735: }
736: } else {
737: # the key does not exist
738: return 'error: The key does not exist';
739: }
740: }
741:
742: # ------------------------------------------------------ Generate a set of keys
743:
744: sub generate_access_keys {
745: my ($number,$cdom,$cnum,$logentry)=@_;
746: $cdom=
747: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
748: $cnum=
749: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
750: unless (&allowed('mky',$cdom)) { return 0; }
751: unless (($cdom) && ($cnum)) { return 0; }
752: if ($number>10000) { return 0; }
753: sleep(2); # make sure don't get same seed twice
754: srand(time()^($$+($$<<15))); # from "Programming Perl"
755: my $total=0;
756: for (my $i=1;$i<=$number;$i++) {
757: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
758: sprintf("%lx",int(100000*rand)).'-'.
759: sprintf("%lx",int(100000*rand));
760: $newkey=~s/1/g/g; # folks mix up 1 and l
761: $newkey=~s/0/h/g; # and also 0 and O
762: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
763: if ($existing{$newkey}) {
764: $i--;
765: } else {
766: if (&put('accesskeys',
767: { $newkey => '# generated '.localtime().
768: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
769: '; '.$logentry },
770: $cdom,$cnum) eq 'ok') {
771: $total++;
772: }
773: }
774: }
775: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
776: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
777: return $total;
778: }
779:
780: # ------------------------------------------------------- Validate an accesskey
781:
782: sub validate_access_key {
783: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
784: $cdom=
785: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
786: $cnum=
787: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
788: $udom=$ENV{'user.domain'} unless (defined($udom));
789: $uname=$ENV{'user.name'} unless (defined($uname));
790: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
791: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
792: }
793:
794: # ------------------------------------- Find the section of student in a course
795:
796: sub getsection {
797: my ($udom,$unam,$courseid)=@_;
798: $courseid=~s/\_/\//g;
799: $courseid=~s/^(\w)/\/$1/;
800:
801: my $hashid="$udom:$unam:$courseid";
802: my ($result,$cached)=&is_cached(\%getsectioncache,$hashid,'getsection');
803: if (defined($cached)) { return $result; }
804:
805: my %Pending;
806: my %Expired;
807: #
808: # Each role can either have not started yet (pending), be active,
809: # or have expired.
810: #
811: # If there is an active role, we are done.
812: #
813: # If there is more than one role which has not started yet,
814: # choose the one which will start sooner
815: # If there is one role which has not started yet, return it.
816: #
817: # If there is more than one expired role, choose the one which ended last.
818: # If there is a role which has expired, return it.
819: #
820: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
821: &homeserver($unam,$udom)))) {
822: my ($key,$value)=split(/\=/,$_);
823: $key=&unescape($key);
824: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
825: my $section=$1;
826: if ($key eq $courseid.'_st') { $section=''; }
827: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
828: my $now=time;
829: if (defined($end) && $end && ($now > $end)) {
830: $Expired{$end}=$section;
831: next;
832: }
833: if (defined($start) && $start && ($now < $start)) {
834: $Pending{$start}=$section;
835: next;
836: }
837: return &do_cache(\%getsectioncache,$hashid,$section,'getsection');
838: }
839: #
840: # Presumedly there will be few matching roles from the above
841: # loop and the sorting time will be negligible.
842: if (scalar(keys(%Pending))) {
843: my ($time) = sort {$a <=> $b} keys(%Pending);
844: return &do_cache(\%getsectioncache,$hashid,$Pending{$time},'getsection');
845: }
846: if (scalar(keys(%Expired))) {
847: my @sorted = sort {$a <=> $b} keys(%Expired);
848: my $time = pop(@sorted);
849: return &do_cache(\%getsectioncache,$hashid,$Expired{$time},'getsection');
850: }
851: return &do_cache(\%getsectioncache,$hashid,'-1','getsection');
852: }
853:
854:
855: my $disk_caching_disabled=1;
856:
857: sub devalidate_cache {
858: my ($cache,$id,$name) = @_;
859: delete $$cache{$id.'.time'};
860: delete $$cache{$id.'.file'};
861: delete $$cache{$id};
862: if (1 || $disk_caching_disabled) { return; }
863: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
864: if (!-e $filename) { return; }
865: open(DB,">$filename.lock");
866: flock(DB,LOCK_EX);
867: my %hash;
868: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
869: eval <<'EVALBLOCK';
870: delete($hash{$id});
871: delete($hash{$id.'.time'});
872: EVALBLOCK
873: if ($@) {
874: &logthis("<font color='red'>devalidate_cache blew up :$@:$name</font>");
875: unlink($filename);
876: }
877: } else {
878: if (-e $filename) {
879: &logthis("Unable to tie hash (devalidate cache): $name");
880: unlink($filename);
881: }
882: }
883: untie(%hash);
884: flock(DB,LOCK_UN);
885: close(DB);
886: }
887:
888: sub is_cached {
889: my ($cache,$id,$name,$time) = @_;
890: if (!$time) { $time=300; }
891: if (!exists($$cache{$id.'.time'})) {
892: &load_cache_item($cache,$name,$id,$time);
893: }
894: if (!exists($$cache{$id.'.time'})) {
895: # &logthis("Didn't find $id");
896: return (undef,undef);
897: } else {
898: if (time-($$cache{$id.'.time'})>$time) {
899: if (exists($$cache{$id.'.file'})) {
900: foreach my $filename (@{ $$cache{$id.'.file'} }) {
901: my $mtime=(stat($filename))[9];
902: #+1 is to take care of edge effects
903: if ($mtime && (($mtime+1) < ($$cache{$id.'.time'}))) {
904: # &logthis("Upping $mtime - ".$$cache{$id.'.time'}.
905: # "$id because of $filename");
906: } else {
907: &logthis("Devalidating $filename $id - ".(time-($$cache{$id.'.time'})));
908: &devalidate_cache($cache,$id,$name);
909: return (undef,undef);
910: }
911: }
912: $$cache{$id.'.time'}=time;
913: } else {
914: # &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
915: &devalidate_cache($cache,$id,$name);
916: return (undef,undef);
917: }
918: }
919: }
920: return ($$cache{$id},1);
921: }
922:
923: sub do_cache {
924: my ($cache,$id,$value,$name) = @_;
925: $$cache{$id.'.time'}=time;
926: $$cache{$id}=$value;
927: # &logthis("Caching $id as :$value:");
928: &save_cache_item($cache,$name,$id);
929: # do_cache implictly return the set value
930: $$cache{$id};
931: }
932:
933: my %do_save_item;
934: my %do_save;
935: sub save_cache_item {
936: my ($cache,$name,$id)=@_;
937: if ($disk_caching_disabled) { return; }
938: $do_save{$name}=$cache;
939: if (!exists($do_save_item{$name})) { $do_save_item{$name}={} }
940: $do_save_item{$name}->{$id}=1;
941: return;
942: }
943:
944: sub save_cache {
945: if ($disk_caching_disabled) { return; }
946: my ($cache,$name,$id);
947: foreach $name (keys(%do_save)) {
948: $cache=$do_save{$name};
949:
950: my $starttime=&Time::HiRes::time();
951: &logthis("Saving :$name:");
952: my %hash;
953: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
954: open(DB,">$filename.lock");
955: flock(DB,LOCK_EX);
956: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
957: foreach $id (keys(%{ $do_save_item{$name} })) {
958: eval <<'EVALBLOCK';
959: $hash{$id.'.time'}=$$cache{$id.'.time'};
960: $hash{$id}=freeze({'item'=>$$cache{$id}});
961: if (exists($$cache{$id.'.file'})) {
962: $hash{$id.'.file'}=freeze({'item'=>$$cache{$id.'.file'}});
963: }
964: EVALBLOCK
965: if ($@) {
966: &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
967: unlink($filename);
968: last;
969: }
970: }
971: } else {
972: if (-e $filename) {
973: &logthis("Unable to tie hash (save cache): $name ($!)");
974: unlink($filename);
975: }
976: }
977: untie(%hash);
978: flock(DB,LOCK_UN);
979: close(DB);
980: &logthis("save_cache $name took ".(&Time::HiRes::time()-$starttime));
981: }
982: undef(%do_save);
983: undef(%do_save_item);
984:
985: }
986:
987: sub load_cache_item {
988: my ($cache,$name,$id,$time)=@_;
989: if ($disk_caching_disabled) { return; }
990: my $starttime=&Time::HiRes::time();
991: # &logthis("Before Loading $name for $id size is ".scalar(%$cache));
992: my %hash;
993: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
994: if (!-e $filename) { return; }
995: open(DB,">$filename.lock");
996: flock(DB,LOCK_SH);
997: if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
998: eval <<'EVALBLOCK';
999: if (!%$cache) {
1000: my $count;
1001: while (my ($key,$value)=each(%hash)) {
1002: $count++;
1003: if ($key =~ /\.time$/) {
1004: $$cache{$key}=$value;
1005: } else {
1006: my $hashref=thaw($value);
1007: $$cache{$key}=$hashref->{'item'};
1008: }
1009: }
1010: # &logthis("Initial load: $count");
1011: } else {
1012: if (($$cache{$id.'.time'}+$time) < time) {
1013: $$cache{$id.'.time'}=$hash{$id.'.time'};
1014: {
1015: my $hashref=thaw($hash{$id});
1016: $$cache{$id}=$hashref->{'item'};
1017: }
1018: if (exists($hash{$id.'.file'})) {
1019: my $hashref=thaw($hash{$id.'.file'});
1020: $$cache{$id.'.file'}=$hashref->{'item'};
1021: }
1022: }
1023: }
1024: EVALBLOCK
1025: if ($@) {
1026: &logthis("<font color='red'>load_cache blew up :$@:$name</font>");
1027: unlink($filename);
1028: }
1029: } else {
1030: if (-e $filename) {
1031: &logthis("Unable to tie hash (load cache item): $name ($!)");
1032: unlink($filename);
1033: }
1034: }
1035: untie(%hash);
1036: flock(DB,LOCK_UN);
1037: close(DB);
1038: # &logthis("After Loading $name size is ".scalar(%$cache));
1039: # &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
1040: }
1041:
1042: # ------------------------------------- Read an entry from a user's environment
1043:
1044: sub userenvironment {
1045: my ($udom,$unam,@what)=@_;
1046: my %returnhash=();
1047: my @answer=split(/\&/,
1048: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1049: &homeserver($unam,$udom)));
1050: my $i;
1051: for ($i=0;$i<=$#what;$i++) {
1052: $returnhash{$what[$i]}=&unescape($answer[$i]);
1053: }
1054: return %returnhash;
1055: }
1056:
1057: # -------------------------------------------------------------------- New chat
1058:
1059: sub chatsend {
1060: my ($newentry,$anon)=@_;
1061: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1062: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1063: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1064: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1065: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
1066: &escape($newentry)),$chome);
1067: }
1068:
1069: # ------------------------------------------ Find current version of a resource
1070:
1071: sub getversion {
1072: my $fname=&clutter(shift);
1073: unless ($fname=~/^\/res\//) { return -1; }
1074: return ¤tversion(&filelocation('',$fname));
1075: }
1076:
1077: sub currentversion {
1078: my $fname=shift;
1079: my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
1080: if (defined($cached)) { return $result; }
1081: my $author=$fname;
1082: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1083: my ($udom,$uname)=split(/\//,$author);
1084: my $home=homeserver($uname,$udom);
1085: if ($home eq 'no_host') {
1086: return -1;
1087: }
1088: my $answer=reply("currentversion:$fname",$home);
1089: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1090: return -1;
1091: }
1092: return &do_cache(\%resversioncache,$fname,$answer,'resversion');
1093: }
1094:
1095: # ----------------------------- Subscribe to a resource, return URL if possible
1096:
1097: sub subscribe {
1098: my $fname=shift;
1099: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1100: $fname=~s/[\n\r]//g;
1101: my $author=$fname;
1102: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1103: my ($udom,$uname)=split(/\//,$author);
1104: my $home=homeserver($uname,$udom);
1105: if ($home eq 'no_host') {
1106: return 'not_found';
1107: }
1108: my $answer=reply("sub:$fname",$home);
1109: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1110: $answer.=' by '.$home;
1111: }
1112: return $answer;
1113: }
1114:
1115: # -------------------------------------------------------------- Replicate file
1116:
1117: sub repcopy {
1118: my $filename=shift;
1119: $filename=~s/\/+/\//g;
1120: if ($filename=~m|^/home/httpd/html/adm/|) { return OK; }
1121: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return OK; }
1122: if ($filename=~m|^/home/httpd/html/userfiles/| or
1123: $filename=~m|^/*uploaded/|) {
1124: return &repcopy_userfile($filename);
1125: }
1126: $filename=~s/[\n\r]//g;
1127: my $transname="$filename.in.transfer";
1128: if ((-e $filename) || (-e $transname)) { return OK; }
1129: my $remoteurl=subscribe($filename);
1130: if ($remoteurl =~ /^con_lost by/) {
1131: &logthis("Subscribe returned $remoteurl: $filename");
1132: return HTTP_SERVICE_UNAVAILABLE;
1133: } elsif ($remoteurl eq 'not_found') {
1134: #&logthis("Subscribe returned not_found: $filename");
1135: return HTTP_NOT_FOUND;
1136: } elsif ($remoteurl =~ /^rejected by/) {
1137: &logthis("Subscribe returned $remoteurl: $filename");
1138: return FORBIDDEN;
1139: } elsif ($remoteurl eq 'directory') {
1140: return OK;
1141: } else {
1142: my $author=$filename;
1143: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1144: my ($udom,$uname)=split(/\//,$author);
1145: my $home=homeserver($uname,$udom);
1146: unless ($home eq $perlvar{'lonHostID'}) {
1147: my @parts=split(/\//,$filename);
1148: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1149: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1150: &logthis("Malconfiguration for replication: $filename");
1151: return HTTP_BAD_REQUEST;
1152: }
1153: my $count;
1154: for ($count=5;$count<$#parts;$count++) {
1155: $path.="/$parts[$count]";
1156: if ((-e $path)!=1) {
1157: mkdir($path,0777);
1158: }
1159: }
1160: my $ua=new LWP::UserAgent;
1161: my $request=new HTTP::Request('GET',"$remoteurl");
1162: my $response=$ua->request($request,$transname);
1163: if ($response->is_error()) {
1164: unlink($transname);
1165: my $message=$response->status_line;
1166: &logthis("<font color=blue>WARNING:"
1167: ." LWP get: $message: $filename</font>");
1168: return HTTP_SERVICE_UNAVAILABLE;
1169: } else {
1170: if ($remoteurl!~/\.meta$/) {
1171: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1172: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1173: if ($mresponse->is_error()) {
1174: unlink($filename.'.meta');
1175: &logthis(
1176: "<font color=yellow>INFO: No metadata: $filename</font>");
1177: }
1178: }
1179: rename($transname,$filename);
1180: return OK;
1181: }
1182: }
1183: }
1184: }
1185:
1186: # ------------------------------------------------ Get server side include body
1187: sub ssi_body {
1188: my ($filelink,%form)=@_;
1189: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1190: &ssi($filelink,%form));
1191: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1192: $output=~s/^.*?\<body[^\>]*\>//si;
1193: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1194: return $output;
1195: }
1196:
1197: # --------------------------------------------------------- Server Side Include
1198:
1199: sub ssi {
1200:
1201: my ($fn,%form)=@_;
1202:
1203: my $ua=new LWP::UserAgent;
1204:
1205: my $request;
1206:
1207: if (%form) {
1208: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1209: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1210: } else {
1211: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1212: }
1213:
1214: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1215: my $response=$ua->request($request);
1216:
1217: return $response->content;
1218: }
1219:
1220: sub externalssi {
1221: my ($url)=@_;
1222: my $ua=new LWP::UserAgent;
1223: my $request=new HTTP::Request('GET',$url);
1224: my $response=$ua->request($request);
1225: return $response->content;
1226: }
1227:
1228: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1229:
1230: sub allowuploaded {
1231: my ($srcurl,$url)=@_;
1232: $url=&clutter(&declutter($url));
1233: my $dir=$url;
1234: $dir=~s/\/[^\/]+$//;
1235: my %httpref=();
1236: my $httpurl=&hreflocation('',$url);
1237: $httpref{'httpref.'.$httpurl}=$srcurl;
1238: &Apache::lonnet::appenv(%httpref);
1239: }
1240:
1241: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1242: # input: action, courseID, current domain, home server for course, intended
1243: # path to file, source of file.
1244: # output: url to file (if action was uploaddoc),
1245: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1246: #
1247: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1248: # course.
1249: #
1250: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1251: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1252: # course's home server.
1253: #
1254: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1255: # be copied from $source (current location) to
1256: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1257: # and will then be copied to
1258: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1259: # course's home server.
1260: #
1261: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1262: # will be retrived from $ENV{form.uploaddoc} (from DOCS interface) to
1263: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1264: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1265: # in course's home server.
1266:
1267:
1268: sub process_coursefile {
1269: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1270: my $fetchresult;
1271: if ($action eq 'propagate') {
1272: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1273: ,$docuhome);
1274: } else {
1275: my $fetchresult = '';
1276: my $fpath = '';
1277: my $fname = $file;
1278: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1279: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1280: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1281: unless ($fpath eq '') {
1282: my @parts=split('/',$fpath);
1283: foreach my $part (@parts) {
1284: $filepath.= '/'.$part;
1285: if ((-e $filepath)!=1) {
1286: mkdir($filepath,0777);
1287: }
1288: }
1289: }
1290: if ($action eq 'copy') {
1291: if ($source eq '') {
1292: $fetchresult = 'no source file';
1293: return $fetchresult;
1294: } else {
1295: my $destination = $filepath.'/'.$fname;
1296: rename($source,$destination);
1297: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1298: $docuhome);
1299: }
1300: } elsif ($action eq 'uploaddoc') {
1301: open(my $fh,'>'.$filepath.'/'.$fname);
1302: print $fh $ENV{'form.'.$source};
1303: close($fh);
1304: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1305: $docuhome);
1306: if ($fetchresult eq 'ok') {
1307: return '/uploaded/'.$fpath.'/'.$fname;
1308: } else {
1309: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1310: ' to host '.$docuhome.': '.$fetchresult);
1311: return '/adm/notfound.html';
1312: }
1313: }
1314: }
1315: unless ( $fetchresult eq 'ok') {
1316: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1317: ' to host '.$docuhome.': '.$fetchresult);
1318: }
1319: return $fetchresult;
1320: }
1321:
1322: # --------------- Take an uploaded file and put it into the userfiles directory
1323: # input: name of form element, coursedoc=1 means this is for the course
1324: # output: url of file in userspace
1325:
1326: sub clean_filename {
1327: my ($fname)=@_;
1328: # Replace Windows backslashes by forward slashes
1329: $fname=~s/\\/\//g;
1330: # Get rid of everything but the actual filename
1331: $fname=~s/^.*\/([^\/]+)$/$1/;
1332: # Replace spaces by underscores
1333: $fname=~s/\s+/\_/g;
1334: # Replace all other weird characters by nothing
1335: $fname=~s/[^\w\.\-]//g;
1336: # Replace all .\d. sequences with _\d. so they no longer look like version
1337: # numbers
1338: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1339: return $fname;
1340: }
1341:
1342: sub userfileupload {
1343: my ($formname,$coursedoc,$subdir)=@_;
1344: if (!defined($subdir)) { $subdir='unknown'; }
1345: my $fname=$ENV{'form.'.$formname.'.filename'};
1346: $fname=&clean_filename($fname);
1347: # See if there is anything left
1348: unless ($fname) { return 'error: no uploaded file'; }
1349: chop($ENV{'form.'.$formname});
1350: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1351: my $now = time;
1352: my $filepath = 'tmp/helprequests/'.$now;
1353: my @parts=split(/\//,$filepath);
1354: my $fullpath = $perlvar{'lonDaemons'};
1355: for (my $i=0;$i<@parts;$i++) {
1356: $fullpath .= '/'.$parts[$i];
1357: if ((-e $fullpath)!=1) {
1358: mkdir($fullpath,0777);
1359: }
1360: }
1361: open(my $fh,'>'.$fullpath.'/'.$fname);
1362: print $fh $ENV{'form.'.$formname};
1363: close($fh);
1364: return $fullpath.'/'.$fname;
1365: }
1366: # Create the directory if not present
1367: my $docuname='';
1368: my $docudom='';
1369: my $docuhome='';
1370: $fname="$subdir/$fname";
1371: if ($coursedoc) {
1372: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1373: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1374: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1375: if ($ENV{'form.folder'} =~ m/^default/) {
1376: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1377: } else {
1378: $fname=$ENV{'form.folder'}.'/'.$fname;
1379: return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1380: }
1381: } else {
1382: $docuname=$ENV{'user.name'};
1383: $docudom=$ENV{'user.domain'};
1384: $docuhome=$ENV{'user.home'};
1385: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1386: }
1387: }
1388:
1389: sub finishuserfileupload {
1390: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1391: my $path=$docudom.'/'.$docuname.'/';
1392: my $filepath=$perlvar{'lonDocRoot'};
1393: my ($fnamepath,$file);
1394: $file=$fname;
1395: if ($fname=~m|/|) {
1396: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1397: $path.=$fnamepath.'/';
1398: }
1399: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1400: my $count;
1401: for ($count=4;$count<=$#parts;$count++) {
1402: $filepath.="/$parts[$count]";
1403: if ((-e $filepath)!=1) {
1404: mkdir($filepath,0777);
1405: }
1406: }
1407: # Save the file
1408: {
1409: #&Apache::lonnet::logthis("Saving to $filepath $file");
1410: open(my $fh,'>'.$filepath.'/'.$file);
1411: print $fh $ENV{'form.'.$formname};
1412: close($fh);
1413: }
1414: # Notify homeserver to grep it
1415: #
1416: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1417: if ($fetchresult eq 'ok') {
1418: #
1419: # Return the URL to it
1420: return '/uploaded/'.$path.$file;
1421: } else {
1422: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1423: ': '.$fetchresult);
1424: return '/adm/notfound.html';
1425: }
1426: }
1427:
1428: sub removeuploadedurl {
1429: my ($url)=@_;
1430: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1431: return &Apache::lonnet::removeuserfile($uname,$udom,$fname);
1432: }
1433:
1434: sub removeuserfile {
1435: my ($docuname,$docudom,$fname)=@_;
1436: my $home=&homeserver($docuname,$docudom);
1437: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1438: }
1439:
1440: sub mkdiruserfile {
1441: my ($docuname,$docudom,$dir)=@_;
1442: my $home=&homeserver($docuname,$docudom);
1443: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1444: }
1445:
1446: sub renameuserfile {
1447: my ($docuname,$docudom,$old,$new)=@_;
1448: my $home=&homeserver($docuname,$docudom);
1449: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1450: &escape("$new"),$home);
1451: }
1452:
1453: # ------------------------------------------------------------------------- Log
1454:
1455: sub log {
1456: my ($dom,$nam,$hom,$what)=@_;
1457: return critical("log:$dom:$nam:$what",$hom);
1458: }
1459:
1460: # ------------------------------------------------------------------ Course Log
1461: #
1462: # This routine flushes several buffers of non-mission-critical nature
1463: #
1464:
1465: sub flushcourselogs {
1466: &logthis('Flushing log buffers');
1467: #
1468: # course logs
1469: # This is a log of all transactions in a course, which can be used
1470: # for data mining purposes
1471: #
1472: # It also collects the courseid database, which lists last transaction
1473: # times and course titles for all courseids
1474: #
1475: my %courseidbuffer=();
1476: foreach (keys %courselogs) {
1477: my $crsid=$_;
1478: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1479: &escape($courselogs{$crsid}),
1480: $coursehombuf{$crsid}) eq 'ok') {
1481: delete $courselogs{$crsid};
1482: } else {
1483: &logthis('Failed to flush log buffer for '.$crsid);
1484: if (length($courselogs{$crsid})>40000) {
1485: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1486: " exceeded maximum size, deleting.</font>");
1487: delete $courselogs{$crsid};
1488: }
1489: }
1490: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1491: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1492: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1493: '='.&escape($courseinstcodebuf{$crsid});
1494: } else {
1495: $courseidbuffer{$coursehombuf{$crsid}}=
1496: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1497: '='.&escape($courseinstcodebuf{$crsid});
1498: }
1499: }
1500: #
1501: # Write course id database (reverse lookup) to homeserver of courses
1502: # Is used in pickcourse
1503: #
1504: foreach (keys %courseidbuffer) {
1505: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1506: }
1507: #
1508: # File accesses
1509: # Writes to the dynamic metadata of resources to get hit counts, etc.
1510: #
1511: foreach my $entry (keys(%accesshash)) {
1512: if ($entry =~ /___count$/) {
1513: my ($dom,$name);
1514: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1515: if (! defined($dom) || $dom eq '' ||
1516: ! defined($name) || $name eq '') {
1517: my $cid = $ENV{'request.course.id'};
1518: $dom = $ENV{'request.'.$cid.'.domain'};
1519: $name = $ENV{'request.'.$cid.'.num'};
1520: }
1521: my $value = $accesshash{$entry};
1522: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1523: my %temphash=($url => $value);
1524: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1525: if ($result eq 'ok') {
1526: delete $accesshash{$entry};
1527: } elsif ($result eq 'unknown_cmd') {
1528: # Target server has old code running on it.
1529: my %temphash=($entry => $value);
1530: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1531: delete $accesshash{$entry};
1532: }
1533: }
1534: } else {
1535: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1536: my %temphash=($entry => $accesshash{$entry});
1537: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1538: delete $accesshash{$entry};
1539: }
1540: }
1541: }
1542: #
1543: # Roles
1544: # Reverse lookup of user roles for course faculty/staff and co-authorship
1545: #
1546: foreach (keys %userrolehash) {
1547: my $entry=$_;
1548: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1549: split(/\:/,$entry);
1550: if (&Apache::lonnet::put('nohist_userroles',
1551: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1552: $rudom,$runame) eq 'ok') {
1553: delete $userrolehash{$entry};
1554: }
1555: }
1556: $dumpcount++;
1557: }
1558:
1559: sub courselog {
1560: my $what=shift;
1561: $what=time.':'.$what;
1562: unless ($ENV{'request.course.id'}) { return ''; }
1563: $coursedombuf{$ENV{'request.course.id'}}=
1564: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1565: $coursenumbuf{$ENV{'request.course.id'}}=
1566: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1567: $coursehombuf{$ENV{'request.course.id'}}=
1568: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1569: $coursedescrbuf{$ENV{'request.course.id'}}=
1570: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1571: $courseinstcodebuf{$ENV{'request.course.id'}}=
1572: $ENV{'course.'.$ENV{'request.course.id'}.'.internal.coursecode'};
1573: if (defined $courselogs{$ENV{'request.course.id'}}) {
1574: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1575: } else {
1576: $courselogs{$ENV{'request.course.id'}}.=$what;
1577: }
1578: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1579: &flushcourselogs();
1580: }
1581: }
1582:
1583: sub courseacclog {
1584: my $fnsymb=shift;
1585: unless ($ENV{'request.course.id'}) { return ''; }
1586: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1587: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1588: $what.=':POST';
1589: foreach (keys %ENV) {
1590: if ($_=~/^form\.(.*)/) {
1591: $what.=':'.$1.'='.$ENV{$_};
1592: }
1593: }
1594: }
1595: &courselog($what);
1596: }
1597:
1598: sub countacc {
1599: my $url=&declutter(shift);
1600: return if (! defined($url) || $url eq '');
1601: unless ($ENV{'request.course.id'}) { return ''; }
1602: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1603: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1604: $accesshash{$key}++;
1605: }
1606:
1607: sub linklog {
1608: my ($from,$to)=@_;
1609: $from=&declutter($from);
1610: $to=&declutter($to);
1611: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1612: $accesshash{$to.'___'.$from.'___goto'}=1;
1613: }
1614:
1615: sub userrolelog {
1616: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1617: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1618: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1619: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1620: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1621: $userrolehash
1622: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1623: =$tend.':'.$tstart;
1624: }
1625: }
1626:
1627: sub get_course_adv_roles {
1628: my $cid=shift;
1629: $cid=$ENV{'request.course.id'} unless (defined($cid));
1630: my %coursehash=&coursedescription($cid);
1631: my %nothide=();
1632: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1633: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1634: }
1635: my %returnhash=();
1636: my %dumphash=
1637: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1638: my $now=time;
1639: foreach (keys %dumphash) {
1640: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1641: if (($tstart) && ($tstart<0)) { next; }
1642: if (($tend) && ($tend<$now)) { next; }
1643: if (($tstart) && ($now<$tstart)) { next; }
1644: my ($role,$username,$domain,$section)=split(/\:/,$_);
1645: if ((&privileged($username,$domain)) &&
1646: (!$nothide{$username.':'.$domain})) { next; }
1647: my $key=&plaintext($role);
1648: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1649: if ($returnhash{$key}) {
1650: $returnhash{$key}.=','.$username.':'.$domain;
1651: } else {
1652: $returnhash{$key}=$username.':'.$domain;
1653: }
1654: }
1655: return %returnhash;
1656: }
1657:
1658: sub get_my_roles {
1659: my ($uname,$udom)=@_;
1660: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1661: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1662: my %dumphash=
1663: &dump('nohist_userroles',$udom,$uname);
1664: my %returnhash=();
1665: my $now=time;
1666: foreach (keys %dumphash) {
1667: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1668: if (($tstart) && ($tstart<0)) { next; }
1669: if (($tend) && ($tend<$now)) { next; }
1670: if (($tstart) && ($now<$tstart)) { next; }
1671: my ($role,$username,$domain,$section)=split(/\:/,$_);
1672: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1673: }
1674: return %returnhash;
1675: }
1676:
1677: # ----------------------------------------------------- Frontpage Announcements
1678: #
1679: #
1680:
1681: sub postannounce {
1682: my ($server,$text)=@_;
1683: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1684: unless ($text=~/\w/) { $text=''; }
1685: return &reply('setannounce:'.&escape($text),$server);
1686: }
1687:
1688: sub getannounce {
1689:
1690: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1691: my $announcement='';
1692: while (<$fh>) { $announcement .=$_; }
1693: close($fh);
1694: if ($announcement=~/\w/) {
1695: return
1696: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1697: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1698: } else {
1699: return '';
1700: }
1701: } else {
1702: return '';
1703: }
1704: }
1705:
1706: # ---------------------------------------------------------- Course ID routines
1707: # Deal with domain's nohist_courseid.db files
1708: #
1709:
1710: sub courseidput {
1711: my ($domain,$what,$coursehome)=@_;
1712: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1713: }
1714:
1715: sub courseiddump {
1716: my ($domfilter,$descfilter,$sincefilter,$hostidflag,$hostidref)=@_;
1717: my %returnhash=();
1718: unless ($domfilter) { $domfilter=''; }
1719: foreach my $tryserver (keys %libserv) {
1720: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1721: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1722: foreach (
1723: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1724: $sincefilter.':'.&escape($descfilter),
1725: $tryserver))) {
1726: my ($key,$value)=split(/\=/,$_);
1727: if (($key) && ($value)) {
1728: $returnhash{&unescape($key)}=$value;
1729: }
1730: }
1731: }
1732: }
1733: }
1734: return %returnhash;
1735: }
1736:
1737: #
1738: # ----------------------------------------------------------- Check out an item
1739:
1740: sub get_first_access {
1741: my ($type,$argsymb)=@_;
1742: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1743: if ($argsymb) { $symb=$argsymb; }
1744: my ($map,$id,$res)=&decode_symb($symb);
1745: if ($type eq 'map') { $res=$map; }
1746: my %times=&get('firstaccesstimes',[$res],$udom,$uname);
1747: return $times{$res};
1748: }
1749:
1750: sub set_first_access {
1751: my ($type)=@_;
1752: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1753: my ($map,$id,$res)=&decode_symb($symb);
1754: if ($type eq 'map') { $res=$map; }
1755: my $firstaccess=&get_first_access($type);
1756: if (!$firstaccess) {
1757: return &put('firstaccesstimes',{$res=>time},$udom,$uname);
1758: }
1759: return 'already_set';
1760: }
1761:
1762: sub checkout {
1763: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1764: my $now=time;
1765: my $lonhost=$perlvar{'lonHostID'};
1766: my $infostr=&escape(
1767: 'CHECKOUTTOKEN&'.
1768: $tuname.'&'.
1769: $tudom.'&'.
1770: $tcrsid.'&'.
1771: $symb.'&'.
1772: $now.'&'.$ENV{'REMOTE_ADDR'});
1773: my $token=&reply('tmpput:'.$infostr,$lonhost);
1774: if ($token=~/^error\:/) {
1775: &logthis("<font color=blue>WARNING: ".
1776: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1777: "</font>");
1778: return '';
1779: }
1780:
1781: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1782: $token=~tr/a-z/A-Z/;
1783:
1784: my %infohash=('resource.0.outtoken' => $token,
1785: 'resource.0.checkouttime' => $now,
1786: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1787:
1788: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1789: return '';
1790: } else {
1791: &logthis("<font color=blue>WARNING: ".
1792: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1793: "</font>");
1794: }
1795:
1796: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1797: &escape('Checkout '.$infostr.' - '.
1798: $token)) ne 'ok') {
1799: return '';
1800: } else {
1801: &logthis("<font color=blue>WARNING: ".
1802: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1803: "</font>");
1804: }
1805: return $token;
1806: }
1807:
1808: # ------------------------------------------------------------ Check in an item
1809:
1810: sub checkin {
1811: my $token=shift;
1812: my $now=time;
1813: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1814: $lonhost=~tr/A-Z/a-z/;
1815: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1816: $dtoken=~s/\W/\_/g;
1817: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1818: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1819:
1820: unless (($tuname) && ($tudom)) {
1821: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1822: return '';
1823: }
1824:
1825: unless (&allowed('mgr',$tcrsid)) {
1826: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1827: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1828: return '';
1829: }
1830:
1831: my %infohash=('resource.0.intoken' => $token,
1832: 'resource.0.checkintime' => $now,
1833: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1834:
1835: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1836: return '';
1837: }
1838:
1839: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1840: &escape('Checkin - '.$token)) ne 'ok') {
1841: return '';
1842: }
1843:
1844: return ($symb,$tuname,$tudom,$tcrsid);
1845: }
1846:
1847: # --------------------------------------------- Set Expire Date for Spreadsheet
1848:
1849: sub expirespread {
1850: my ($uname,$udom,$stype,$usymb)=@_;
1851: my $cid=$ENV{'request.course.id'};
1852: if ($cid) {
1853: my $now=time;
1854: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1855: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1856: $ENV{'course.'.$cid.'.num'}.
1857: ':nohist_expirationdates:'.
1858: &escape($key).'='.$now,
1859: $ENV{'course.'.$cid.'.home'})
1860: }
1861: return 'ok';
1862: }
1863:
1864: # ----------------------------------------------------- Devalidate Spreadsheets
1865:
1866: sub devalidate {
1867: my ($symb,$uname,$udom)=@_;
1868: my $cid=$ENV{'request.course.id'};
1869: if ($cid) {
1870: # delete the stored spreadsheets for
1871: # - the student level sheet of this user in course's homespace
1872: # - the assessment level sheet for this resource
1873: # for this user in user's homespace
1874: # - current conditional state info
1875: my $key=$uname.':'.$udom.':';
1876: my $status=
1877: &del('nohist_calculatedsheets',
1878: [$key.'studentcalc:'],
1879: $ENV{'course.'.$cid.'.domain'},
1880: $ENV{'course.'.$cid.'.num'})
1881: .' '.
1882: &del('nohist_calculatedsheets_'.$cid,
1883: [$key.'assesscalc:'.$symb],$udom,$uname);
1884: unless ($status eq 'ok ok') {
1885: &logthis('Could not devalidate spreadsheet '.
1886: $uname.' at '.$udom.' for '.
1887: $symb.': '.$status);
1888: }
1889: &delenv('user.state.'.$cid);
1890: }
1891: }
1892:
1893: sub get_scalar {
1894: my ($string,$end) = @_;
1895: my $value;
1896: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1897: $value = $1;
1898: } elsif ($$string =~ s/^([^&]*?)&//) {
1899: $value = $1;
1900: }
1901: return &unescape($value);
1902: }
1903:
1904: sub array2str {
1905: my (@array) = @_;
1906: my $result=&arrayref2str(\@array);
1907: $result=~s/^__ARRAY_REF__//;
1908: $result=~s/__END_ARRAY_REF__$//;
1909: return $result;
1910: }
1911:
1912: sub arrayref2str {
1913: my ($arrayref) = @_;
1914: my $result='__ARRAY_REF__';
1915: foreach my $elem (@$arrayref) {
1916: if(ref($elem) eq 'ARRAY') {
1917: $result.=&arrayref2str($elem).'&';
1918: } elsif(ref($elem) eq 'HASH') {
1919: $result.=&hashref2str($elem).'&';
1920: } elsif(ref($elem)) {
1921: #print("Got a ref of ".(ref($elem))." skipping.");
1922: } else {
1923: $result.=&escape($elem).'&';
1924: }
1925: }
1926: $result=~s/\&$//;
1927: $result .= '__END_ARRAY_REF__';
1928: return $result;
1929: }
1930:
1931: sub hash2str {
1932: my (%hash) = @_;
1933: my $result=&hashref2str(\%hash);
1934: $result=~s/^__HASH_REF__//;
1935: $result=~s/__END_HASH_REF__$//;
1936: return $result;
1937: }
1938:
1939: sub hashref2str {
1940: my ($hashref)=@_;
1941: my $result='__HASH_REF__';
1942: foreach (sort(keys(%$hashref))) {
1943: if (ref($_) eq 'ARRAY') {
1944: $result.=&arrayref2str($_).'=';
1945: } elsif (ref($_) eq 'HASH') {
1946: $result.=&hashref2str($_).'=';
1947: } elsif (ref($_)) {
1948: $result.='=';
1949: #print("Got a ref of ".(ref($_))." skipping.");
1950: } else {
1951: if ($_) {$result.=&escape($_).'=';} else { last; }
1952: }
1953:
1954: if(ref($hashref->{$_}) eq 'ARRAY') {
1955: $result.=&arrayref2str($hashref->{$_}).'&';
1956: } elsif(ref($hashref->{$_}) eq 'HASH') {
1957: $result.=&hashref2str($hashref->{$_}).'&';
1958: } elsif(ref($hashref->{$_})) {
1959: $result.='&';
1960: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1961: } else {
1962: $result.=&escape($hashref->{$_}).'&';
1963: }
1964: }
1965: $result=~s/\&$//;
1966: $result .= '__END_HASH_REF__';
1967: return $result;
1968: }
1969:
1970: sub str2hash {
1971: my ($string)=@_;
1972: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1973: return %$hash;
1974: }
1975:
1976: sub str2hashref {
1977: my ($string) = @_;
1978:
1979: my %hash;
1980:
1981: if($string !~ /^__HASH_REF__/) {
1982: if (! ($string eq '' || !defined($string))) {
1983: $hash{'error'}='Not hash reference';
1984: }
1985: return (\%hash, $string);
1986: }
1987:
1988: $string =~ s/^__HASH_REF__//;
1989:
1990: while($string !~ /^__END_HASH_REF__/) {
1991: #key
1992: my $key='';
1993: if($string =~ /^__HASH_REF__/) {
1994: ($key, $string)=&str2hashref($string);
1995: if(defined($key->{'error'})) {
1996: $hash{'error'}='Bad data';
1997: return (\%hash, $string);
1998: }
1999: } elsif($string =~ /^__ARRAY_REF__/) {
2000: ($key, $string)=&str2arrayref($string);
2001: if($key->[0] eq 'Array reference error') {
2002: $hash{'error'}='Bad data';
2003: return (\%hash, $string);
2004: }
2005: } else {
2006: $string =~ s/^(.*?)=//;
2007: $key=&unescape($1);
2008: }
2009: $string =~ s/^=//;
2010:
2011: #value
2012: my $value='';
2013: if($string =~ /^__HASH_REF__/) {
2014: ($value, $string)=&str2hashref($string);
2015: if(defined($value->{'error'})) {
2016: $hash{'error'}='Bad data';
2017: return (\%hash, $string);
2018: }
2019: } elsif($string =~ /^__ARRAY_REF__/) {
2020: ($value, $string)=&str2arrayref($string);
2021: if($value->[0] eq 'Array reference error') {
2022: $hash{'error'}='Bad data';
2023: return (\%hash, $string);
2024: }
2025: } else {
2026: $value=&get_scalar(\$string,'__END_HASH_REF__');
2027: }
2028: $string =~ s/^&//;
2029:
2030: $hash{$key}=$value;
2031: }
2032:
2033: $string =~ s/^__END_HASH_REF__//;
2034:
2035: return (\%hash, $string);
2036: }
2037:
2038: sub str2array {
2039: my ($string)=@_;
2040: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2041: return @$array;
2042: }
2043:
2044: sub str2arrayref {
2045: my ($string) = @_;
2046: my @array;
2047:
2048: if($string !~ /^__ARRAY_REF__/) {
2049: if (! ($string eq '' || !defined($string))) {
2050: $array[0]='Array reference error';
2051: }
2052: return (\@array, $string);
2053: }
2054:
2055: $string =~ s/^__ARRAY_REF__//;
2056:
2057: while($string !~ /^__END_ARRAY_REF__/) {
2058: my $value='';
2059: if($string =~ /^__HASH_REF__/) {
2060: ($value, $string)=&str2hashref($string);
2061: if(defined($value->{'error'})) {
2062: $array[0] ='Array reference error';
2063: return (\@array, $string);
2064: }
2065: } elsif($string =~ /^__ARRAY_REF__/) {
2066: ($value, $string)=&str2arrayref($string);
2067: if($value->[0] eq 'Array reference error') {
2068: $array[0] ='Array reference error';
2069: return (\@array, $string);
2070: }
2071: } else {
2072: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2073: }
2074: $string =~ s/^&//;
2075:
2076: push(@array, $value);
2077: }
2078:
2079: $string =~ s/^__END_ARRAY_REF__//;
2080:
2081: return (\@array, $string);
2082: }
2083:
2084: # -------------------------------------------------------------------Temp Store
2085:
2086: sub tmpreset {
2087: my ($symb,$namespace,$domain,$stuname) = @_;
2088: if (!$symb) {
2089: $symb=&symbread();
2090: if (!$symb) { $symb= $ENV{'request.url'}; }
2091: }
2092: $symb=escape($symb);
2093:
2094: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2095: $namespace=~s/\//\_/g;
2096: $namespace=~s/\W//g;
2097:
2098: #FIXME needs to do something for /pub resources
2099: if (!$domain) { $domain=$ENV{'user.domain'}; }
2100: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2101: my $path=$perlvar{'lonDaemons'}.'/tmp';
2102: my %hash;
2103: if (tie(%hash,'GDBM_File',
2104: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2105: &GDBM_WRCREAT(),0640)) {
2106: foreach my $key (keys %hash) {
2107: if ($key=~ /:$symb/) {
2108: delete($hash{$key});
2109: }
2110: }
2111: }
2112: }
2113:
2114: sub tmpstore {
2115: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2116:
2117: if (!$symb) {
2118: $symb=&symbread();
2119: if (!$symb) { $symb= $ENV{'request.url'}; }
2120: }
2121: $symb=escape($symb);
2122:
2123: if (!$namespace) {
2124: # I don't think we would ever want to store this for a course.
2125: # it seems this will only be used if we don't have a course.
2126: #$namespace=$ENV{'request.course.id'};
2127: #if (!$namespace) {
2128: $namespace=$ENV{'request.state'};
2129: #}
2130: }
2131: $namespace=~s/\//\_/g;
2132: $namespace=~s/\W//g;
2133: #FIXME needs to do something for /pub resources
2134: if (!$domain) { $domain=$ENV{'user.domain'}; }
2135: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2136: my $now=time;
2137: my %hash;
2138: my $path=$perlvar{'lonDaemons'}.'/tmp';
2139: if (tie(%hash,'GDBM_File',
2140: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2141: &GDBM_WRCREAT(),0640)) {
2142: $hash{"version:$symb"}++;
2143: my $version=$hash{"version:$symb"};
2144: my $allkeys='';
2145: foreach my $key (keys(%$storehash)) {
2146: $allkeys.=$key.':';
2147: $hash{"$version:$symb:$key"}=$$storehash{$key};
2148: }
2149: $hash{"$version:$symb:timestamp"}=$now;
2150: $allkeys.='timestamp';
2151: $hash{"$version:keys:$symb"}=$allkeys;
2152: if (untie(%hash)) {
2153: return 'ok';
2154: } else {
2155: return "error:$!";
2156: }
2157: } else {
2158: return "error:$!";
2159: }
2160: }
2161:
2162: # -----------------------------------------------------------------Temp Restore
2163:
2164: sub tmprestore {
2165: my ($symb,$namespace,$domain,$stuname) = @_;
2166:
2167: if (!$symb) {
2168: $symb=&symbread();
2169: if (!$symb) { $symb= $ENV{'request.url'}; }
2170: }
2171: $symb=escape($symb);
2172:
2173: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2174: #FIXME needs to do something for /pub resources
2175: if (!$domain) { $domain=$ENV{'user.domain'}; }
2176: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2177:
2178: my %returnhash;
2179: $namespace=~s/\//\_/g;
2180: $namespace=~s/\W//g;
2181: my %hash;
2182: my $path=$perlvar{'lonDaemons'}.'/tmp';
2183: if (tie(%hash,'GDBM_File',
2184: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2185: &GDBM_READER(),0640)) {
2186: my $version=$hash{"version:$symb"};
2187: $returnhash{'version'}=$version;
2188: my $scope;
2189: for ($scope=1;$scope<=$version;$scope++) {
2190: my $vkeys=$hash{"$scope:keys:$symb"};
2191: my @keys=split(/:/,$vkeys);
2192: my $key;
2193: $returnhash{"$scope:keys"}=$vkeys;
2194: foreach $key (@keys) {
2195: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
2196: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
2197: }
2198: }
2199: if (!(untie(%hash))) {
2200: return "error:$!";
2201: }
2202: } else {
2203: return "error:$!";
2204: }
2205: return %returnhash;
2206: }
2207:
2208: # ----------------------------------------------------------------------- Store
2209:
2210: sub store {
2211: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2212: my $home='';
2213:
2214: if ($stuname) { $home=&homeserver($stuname,$domain); }
2215:
2216: $symb=&symbclean($symb);
2217: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2218:
2219: if (!$domain) { $domain=$ENV{'user.domain'}; }
2220: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2221:
2222: &devalidate($symb,$stuname,$domain);
2223:
2224: $symb=escape($symb);
2225: if (!$namespace) {
2226: unless ($namespace=$ENV{'request.course.id'}) {
2227: return '';
2228: }
2229: }
2230: if (!$home) { $home=$ENV{'user.home'}; }
2231:
2232: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2233: $$storehash{'host'}=$perlvar{'lonHostID'};
2234:
2235: my $namevalue='';
2236: foreach (keys %$storehash) {
2237: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2238: }
2239: $namevalue=~s/\&$//;
2240: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2241: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2242: }
2243:
2244: # -------------------------------------------------------------- Critical Store
2245:
2246: sub cstore {
2247: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2248: my $home='';
2249:
2250: if ($stuname) { $home=&homeserver($stuname,$domain); }
2251:
2252: $symb=&symbclean($symb);
2253: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2254:
2255: if (!$domain) { $domain=$ENV{'user.domain'}; }
2256: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2257:
2258: &devalidate($symb,$stuname,$domain);
2259:
2260: $symb=escape($symb);
2261: if (!$namespace) {
2262: unless ($namespace=$ENV{'request.course.id'}) {
2263: return '';
2264: }
2265: }
2266: if (!$home) { $home=$ENV{'user.home'}; }
2267:
2268: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2269: $$storehash{'host'}=$perlvar{'lonHostID'};
2270:
2271: my $namevalue='';
2272: foreach (keys %$storehash) {
2273: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2274: }
2275: $namevalue=~s/\&$//;
2276: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2277: return critical
2278: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2279: }
2280:
2281: # --------------------------------------------------------------------- Restore
2282:
2283: sub restore {
2284: my ($symb,$namespace,$domain,$stuname) = @_;
2285: my $home='';
2286:
2287: if ($stuname) { $home=&homeserver($stuname,$domain); }
2288:
2289: if (!$symb) {
2290: unless ($symb=escape(&symbread())) { return ''; }
2291: } else {
2292: $symb=&escape(&symbclean($symb));
2293: }
2294: if (!$namespace) {
2295: unless ($namespace=$ENV{'request.course.id'}) {
2296: return '';
2297: }
2298: }
2299: if (!$domain) { $domain=$ENV{'user.domain'}; }
2300: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2301: if (!$home) { $home=$ENV{'user.home'}; }
2302: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2303:
2304: my %returnhash=();
2305: foreach (split(/\&/,$answer)) {
2306: my ($name,$value)=split(/\=/,$_);
2307: $returnhash{&unescape($name)}=&unescape($value);
2308: }
2309: my $version;
2310: for ($version=1;$version<=$returnhash{'version'};$version++) {
2311: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2312: $returnhash{$_}=$returnhash{$version.':'.$_};
2313: }
2314: }
2315: return %returnhash;
2316: }
2317:
2318: # ---------------------------------------------------------- Course Description
2319:
2320: sub coursedescription {
2321: my $courseid=shift;
2322: $courseid=~s/^\///;
2323: $courseid=~s/\_/\//g;
2324: my ($cdomain,$cnum)=split(/\//,$courseid);
2325: my $chome=&homeserver($cnum,$cdomain);
2326: my $normalid=$cdomain.'_'.$cnum;
2327: # need to always cache even if we get errors otherwise we keep
2328: # trying and trying and trying to get the course description.
2329: my %envhash=();
2330: my %returnhash=();
2331: $envhash{'course.'.$normalid.'.last_cache'}=time;
2332: if ($chome ne 'no_host') {
2333: %returnhash=&dump('environment',$cdomain,$cnum);
2334: if (!exists($returnhash{'con_lost'})) {
2335: $returnhash{'home'}= $chome;
2336: $returnhash{'domain'} = $cdomain;
2337: $returnhash{'num'} = $cnum;
2338: while (my ($name,$value) = each %returnhash) {
2339: $envhash{'course.'.$normalid.'.'.$name}=$value;
2340: }
2341: $returnhash{'url'}=&clutter($returnhash{'url'});
2342: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2343: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2344: $envhash{'course.'.$normalid.'.home'}=$chome;
2345: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2346: $envhash{'course.'.$normalid.'.num'}=$cnum;
2347: }
2348: }
2349: &appenv(%envhash);
2350: return %returnhash;
2351: }
2352:
2353: # -------------------------------------------------See if a user is privileged
2354:
2355: sub privileged {
2356: my ($username,$domain)=@_;
2357: my $rolesdump=&reply("dump:$domain:$username:roles",
2358: &homeserver($username,$domain));
2359: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2360: my $now=time;
2361: if ($rolesdump ne '') {
2362: foreach (split(/&/,$rolesdump)) {
2363: if ($_!~/^rolesdef\&/) {
2364: my ($area,$role)=split(/=/,$_);
2365: $area=~s/\_\w\w$//;
2366: my ($trole,$tend,$tstart)=split(/_/,$role);
2367: if (($trole eq 'dc') || ($trole eq 'su')) {
2368: my $active=1;
2369: if ($tend) {
2370: if ($tend<$now) { $active=0; }
2371: }
2372: if ($tstart) {
2373: if ($tstart>$now) { $active=0; }
2374: }
2375: if ($active) { return 1; }
2376: }
2377: }
2378: }
2379: }
2380: return 0;
2381: }
2382:
2383: # -------------------------------------------------------- Get user privileges
2384:
2385: sub rolesinit {
2386: my ($domain,$username,$authhost)=@_;
2387: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2388: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2389: my %allroles=();
2390: my $now=time;
2391: my $userroles="user.login.time=$now\n";
2392:
2393: if ($rolesdump ne '') {
2394: foreach (split(/&/,$rolesdump)) {
2395: if ($_!~/^rolesdef\&/) {
2396: my ($area,$role)=split(/=/,$_);
2397: $area=~s/\_\w\w$//;
2398: my ($trole,$tend,$tstart)=split(/_/,$role);
2399: $userroles.=&set_arearole($trole,$area,$tstart,$tend);
2400: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2401: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2402: if (($area ne '') && ($trole ne '')) {
2403: my $spec=$trole.'.'.$area;
2404: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2405: if ($trole =~ /^cr\//) {
2406: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2407: } else {
2408: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2409: }
2410: }
2411: }
2412: }
2413: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles);
2414: $userroles.='user.adv='.$adv."\n".
2415: 'user.author='.$author."\n";
2416: $ENV{'user.adv'}=$adv;
2417: }
2418: return $userroles;
2419: }
2420:
2421: sub set_arearole {
2422: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2423: # log the associated role with the area
2424: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2425: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2426: }
2427:
2428: sub custom_roleprivs {
2429: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2430: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2431: my $homsvr=homeserver($rauthor,$rdomain);
2432: if ($hostname{$homsvr} ne '') {
2433: my ($rdummy,$roledef)=
2434: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2435: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2436: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2437: if (defined($syspriv)) {
2438: $$allroles{'cm./'}.=':'.$syspriv;
2439: $$allroles{$spec.'./'}.=':'.$syspriv;
2440: }
2441: if ($tdomain ne '') {
2442: if (defined($dompriv)) {
2443: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2444: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2445: }
2446: if (($trest ne '') && (defined($coursepriv))) {
2447: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2448: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2449: }
2450: }
2451: }
2452: }
2453: }
2454:
2455:
2456: sub standard_roleprivs {
2457: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2458: if (defined($pr{$trole.':s'})) {
2459: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2460: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2461: }
2462: if ($tdomain ne '') {
2463: if (defined($pr{$trole.':d'})) {
2464: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2465: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2466: }
2467: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2468: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2469: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2470: }
2471: }
2472: }
2473:
2474: sub set_userprivs {
2475: my ($userroles,$allroles) = @_;
2476: my $author=0;
2477: my $adv=0;
2478: foreach (keys %{$allroles}) {
2479: my %thesepriv=();
2480: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2481: foreach (split(/:/,$$allroles{$_})) {
2482: if ($_ ne '') {
2483: my ($privilege,$restrictions)=split(/&/,$_);
2484: if ($restrictions eq '') {
2485: $thesepriv{$privilege}='F';
2486: } elsif ($thesepriv{$privilege} ne 'F') {
2487: $thesepriv{$privilege}.=$restrictions;
2488: }
2489: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2490: }
2491: }
2492: my $thesestr='';
2493: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2494: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2495: }
2496: return ($author,$adv);
2497: }
2498:
2499: # --------------------------------------------------------------- get interface
2500:
2501: sub get {
2502: my ($namespace,$storearr,$udomain,$uname)=@_;
2503: my $items='';
2504: foreach (@$storearr) {
2505: $items.=escape($_).'&';
2506: }
2507: $items=~s/\&$//;
2508: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2509: if (!$uname) { $uname=$ENV{'user.name'}; }
2510: my $uhome=&homeserver($uname,$udomain);
2511:
2512: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2513: my @pairs=split(/\&/,$rep);
2514: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2515: return @pairs;
2516: }
2517: my %returnhash=();
2518: my $i=0;
2519: foreach (@$storearr) {
2520: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2521: $i++;
2522: }
2523: return %returnhash;
2524: }
2525:
2526: # --------------------------------------------------------------- del interface
2527:
2528: sub del {
2529: my ($namespace,$storearr,$udomain,$uname)=@_;
2530: my $items='';
2531: foreach (@$storearr) {
2532: $items.=escape($_).'&';
2533: }
2534: $items=~s/\&$//;
2535: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2536: if (!$uname) { $uname=$ENV{'user.name'}; }
2537: my $uhome=&homeserver($uname,$udomain);
2538:
2539: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2540: }
2541:
2542: # -------------------------------------------------------------- dump interface
2543:
2544: sub dump {
2545: my ($namespace,$udomain,$uname,$regexp)=@_;
2546: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2547: if (!$uname) { $uname=$ENV{'user.name'}; }
2548: my $uhome=&homeserver($uname,$udomain);
2549: if ($regexp) {
2550: $regexp=&escape($regexp);
2551: } else {
2552: $regexp='.';
2553: }
2554: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2555: my @pairs=split(/\&/,$rep);
2556: my %returnhash=();
2557: foreach (@pairs) {
2558: my ($key,$value)=split(/=/,$_);
2559: $returnhash{unescape($key)}=&thaw_unescape($value);
2560: }
2561: return %returnhash;
2562: }
2563:
2564: # -------------------------------------------------------------- keys interface
2565:
2566: sub getkeys {
2567: my ($namespace,$udomain,$uname)=@_;
2568: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2569: if (!$uname) { $uname=$ENV{'user.name'}; }
2570: my $uhome=&homeserver($uname,$udomain);
2571: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2572: my @keyarray=();
2573: foreach (split(/\&/,$rep)) {
2574: push (@keyarray,&unescape($_));
2575: }
2576: return @keyarray;
2577: }
2578:
2579: # --------------------------------------------------------------- currentdump
2580: sub currentdump {
2581: my ($courseid,$sdom,$sname)=@_;
2582: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2583: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2584: $sname = $ENV{'user.name'} if (! defined($sname));
2585: my $uhome = &homeserver($sname,$sdom);
2586: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2587: return if ($rep =~ /^(error:|no_such_host)/);
2588: #
2589: my %returnhash=();
2590: #
2591: if ($rep eq "unknown_cmd") {
2592: # an old lond will not know currentdump
2593: # Do a dump and make it look like a currentdump
2594: my @tmp = &dump($courseid,$sdom,$sname,'.');
2595: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2596: my %hash = @tmp;
2597: @tmp=();
2598: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2599: } else {
2600: my @pairs=split(/\&/,$rep);
2601: foreach (@pairs) {
2602: my ($key,$value)=split(/=/,$_);
2603: my ($symb,$param) = split(/:/,$key);
2604: $returnhash{&unescape($symb)}->{&unescape($param)} =
2605: &thaw_unescape($value);
2606: }
2607: }
2608: return %returnhash;
2609: }
2610:
2611: sub convert_dump_to_currentdump{
2612: my %hash = %{shift()};
2613: my %returnhash;
2614: # Code ripped from lond, essentially. The only difference
2615: # here is the unescaping done by lonnet::dump(). Conceivably
2616: # we might run in to problems with parameter names =~ /^v\./
2617: while (my ($key,$value) = each(%hash)) {
2618: my ($v,$symb,$param) = split(/:/,$key);
2619: next if ($v eq 'version' || $symb eq 'keys');
2620: next if (exists($returnhash{$symb}) &&
2621: exists($returnhash{$symb}->{$param}) &&
2622: $returnhash{$symb}->{'v.'.$param} > $v);
2623: $returnhash{$symb}->{$param}=$value;
2624: $returnhash{$symb}->{'v.'.$param}=$v;
2625: }
2626: #
2627: # Remove all of the keys in the hashes which keep track of
2628: # the version of the parameter.
2629: while (my ($symb,$param_hash) = each(%returnhash)) {
2630: # use a foreach because we are going to delete from the hash.
2631: foreach my $key (keys(%$param_hash)) {
2632: delete($param_hash->{$key}) if ($key =~ /^v\./);
2633: }
2634: }
2635: return \%returnhash;
2636: }
2637:
2638: # --------------------------------------------------------------- inc interface
2639:
2640: sub inc {
2641: my ($namespace,$store,$udomain,$uname) = @_;
2642: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2643: if (!$uname) { $uname=$ENV{'user.name'}; }
2644: my $uhome=&homeserver($uname,$udomain);
2645: my $items='';
2646: if (! ref($store)) {
2647: # got a single value, so use that instead
2648: $items = &escape($store).'=&';
2649: } elsif (ref($store) eq 'SCALAR') {
2650: $items = &escape($$store).'=&';
2651: } elsif (ref($store) eq 'ARRAY') {
2652: $items = join('=&',map {&escape($_);} @{$store});
2653: } elsif (ref($store) eq 'HASH') {
2654: while (my($key,$value) = each(%{$store})) {
2655: $items.= &escape($key).'='.&escape($value).'&';
2656: }
2657: }
2658: $items=~s/\&$//;
2659: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2660: }
2661:
2662: # --------------------------------------------------------------- put interface
2663:
2664: sub put {
2665: my ($namespace,$storehash,$udomain,$uname)=@_;
2666: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2667: if (!$uname) { $uname=$ENV{'user.name'}; }
2668: my $uhome=&homeserver($uname,$udomain);
2669: my $items='';
2670: foreach (keys %$storehash) {
2671: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2672: }
2673: $items=~s/\&$//;
2674: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2675: }
2676:
2677: # ---------------------------------------------------------- putstore interface
2678:
2679: sub putstore {
2680: my ($namespace,$storehash,$udomain,$uname)=@_;
2681: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2682: if (!$uname) { $uname=$ENV{'user.name'}; }
2683: my $uhome=&homeserver($uname,$udomain);
2684: my $items='';
2685: my %allitems = ();
2686: foreach (keys %$storehash) {
2687: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2688: my $key = $1.':keys:'.$2;
2689: $allitems{$key} .= $3.':';
2690: }
2691: $items.=$_.'='.&escape($$storehash{$_}).'&';
2692: }
2693: foreach (keys %allitems) {
2694: $allitems{$_} =~ s/\:$//;
2695: $items.= $_.'='.$allitems{$_}.'&';
2696: }
2697: $items=~s/\&$//;
2698: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2699: }
2700:
2701: # ------------------------------------------------------ critical put interface
2702:
2703: sub cput {
2704: my ($namespace,$storehash,$udomain,$uname)=@_;
2705: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2706: if (!$uname) { $uname=$ENV{'user.name'}; }
2707: my $uhome=&homeserver($uname,$udomain);
2708: my $items='';
2709: foreach (keys %$storehash) {
2710: $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2711: }
2712: $items=~s/\&$//;
2713: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2714: }
2715:
2716: # -------------------------------------------------------------- eget interface
2717:
2718: sub eget {
2719: my ($namespace,$storearr,$udomain,$uname)=@_;
2720: my $items='';
2721: foreach (@$storearr) {
2722: $items.=escape($_).'&';
2723: }
2724: $items=~s/\&$//;
2725: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2726: if (!$uname) { $uname=$ENV{'user.name'}; }
2727: my $uhome=&homeserver($uname,$udomain);
2728: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2729: my @pairs=split(/\&/,$rep);
2730: my %returnhash=();
2731: my $i=0;
2732: foreach (@$storearr) {
2733: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2734: $i++;
2735: }
2736: return %returnhash;
2737: }
2738:
2739: # ---------------------------------------------- Custom access rule evaluation
2740:
2741: sub customaccess {
2742: my ($priv,$uri)=@_;
2743: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2744: $urealm=~s/^\W//;
2745: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2746: my $access=0;
2747: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2748: my ($effect,$realm,$role)=split(/\:/,$_);
2749: if ($role) {
2750: if ($role ne $urole) { next; }
2751: }
2752: foreach (split(/\s*\,\s*/,$realm)) {
2753: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2754: if ($tdom) {
2755: if ($tdom ne $udom) { next; }
2756: }
2757: if ($tcrs) {
2758: if ($tcrs ne $ucrs) { next; }
2759: }
2760: if ($tsec) {
2761: if ($tsec ne $usec) { next; }
2762: }
2763: $access=($effect eq 'allow');
2764: last;
2765: }
2766: if ($realm eq '' && $role eq '') {
2767: $access=($effect eq 'allow');
2768: }
2769: }
2770: return $access;
2771: }
2772:
2773: # ------------------------------------------------- Check for a user privilege
2774:
2775: sub allowed {
2776: my ($priv,$uri)=@_;
2777: $uri=&deversion($uri);
2778: my $orguri=$uri;
2779: $uri=&declutter($uri);
2780:
2781:
2782:
2783: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2784: # Free bre access to adm and meta resources
2785: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
2786: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2787: return 'F';
2788: }
2789:
2790: # Free bre access to user's own portfolio contents
2791: my ($space,$domain,$name,$dir)=split('/',$uri);
2792: if (('uploaded' eq $space) && ($ENV{'user.name'} eq $name) &&
2793: ($ENV{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
2794: return 'F';
2795: }
2796:
2797: # Free bre to public access
2798:
2799: if ($priv eq 'bre') {
2800: my $copyright=&metadata($uri,'copyright');
2801: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2802: return 'F';
2803: }
2804: if ($copyright eq 'priv') {
2805: $uri=~/([^\/]+)\/([^\/]+)\//;
2806: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2807: return '';
2808: }
2809: }
2810: if ($copyright eq 'domain') {
2811: $uri=~/([^\/]+)\/([^\/]+)\//;
2812: unless (($ENV{'user.domain'} eq $1) ||
2813: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2814: return '';
2815: }
2816: }
2817: if ($ENV{'request.role'}=~ /li\.\//) {
2818: # Library role, so allow browsing of resources in this domain.
2819: return 'F';
2820: }
2821: if ($copyright eq 'custom') {
2822: unless (&customaccess($priv,$uri)) { return ''; }
2823: }
2824: }
2825: # Domain coordinator is trying to create a course
2826: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2827: # uri is the requested domain in this case.
2828: # comparison to 'request.role.domain' shows if the user has selected
2829: # a role of dc for the domain in question.
2830: return 'F' if ($uri eq $ENV{'request.role.domain'});
2831: }
2832:
2833: my $thisallowed='';
2834: my $statecond=0;
2835: my $courseprivid='';
2836:
2837: # Course
2838:
2839: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
2840: $thisallowed.=$1;
2841: }
2842:
2843: # Domain
2844:
2845: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2846: =~/\Q$priv\E\&([^\:]*)/) {
2847: $thisallowed.=$1;
2848: }
2849:
2850: # Course: uri itself is a course
2851: my $courseuri=$uri;
2852: $courseuri=~s/\_(\d)/\/$1/;
2853: $courseuri=~s/^([^\/])/\/$1/;
2854:
2855: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2856: =~/\Q$priv\E\&([^\:]*)/) {
2857: $thisallowed.=$1;
2858: }
2859:
2860: # URI is an uploaded document for this course
2861:
2862: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
2863: my $refuri=$ENV{'httpref.'.$orguri};
2864: if ($refuri) {
2865: if ($refuri =~ m|^/adm/|) {
2866: $thisallowed='F';
2867: }
2868: }
2869: }
2870:
2871: # Full access at system, domain or course-wide level? Exit.
2872:
2873: if ($thisallowed=~/F/) {
2874: return 'F';
2875: }
2876:
2877: # If this is generating or modifying users, exit with special codes
2878:
2879: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
2880: return $thisallowed;
2881: }
2882: #
2883: # Gathered so far: system, domain and course wide privileges
2884: #
2885: # Course: See if uri or referer is an individual resource that is part of
2886: # the course
2887:
2888: if ($ENV{'request.course.id'}) {
2889:
2890: $courseprivid=$ENV{'request.course.id'};
2891: if ($ENV{'request.course.sec'}) {
2892: $courseprivid.='/'.$ENV{'request.course.sec'};
2893: }
2894: $courseprivid=~s/\_/\//;
2895: my $checkreferer=1;
2896: my ($match,$cond)=&is_on_map($uri);
2897: if ($match) {
2898: $statecond=$cond;
2899: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2900: =~/\Q$priv\E\&([^\:]*)/) {
2901: $thisallowed.=$1;
2902: $checkreferer=0;
2903: }
2904: }
2905:
2906: if ($checkreferer) {
2907: my $refuri=$ENV{'httpref.'.$orguri};
2908: unless ($refuri) {
2909: foreach (keys %ENV) {
2910: if ($_=~/^httpref\..*\*/) {
2911: my $pattern=$_;
2912: $pattern=~s/^httpref\.\/res\///;
2913: $pattern=~s/\*/\[\^\/\]\+/g;
2914: $pattern=~s/\//\\\//g;
2915: if ($orguri=~/$pattern/) {
2916: $refuri=$ENV{$_};
2917: }
2918: }
2919: }
2920: }
2921:
2922: if ($refuri) {
2923: $refuri=&declutter($refuri);
2924: my ($match,$cond)=&is_on_map($refuri);
2925: if ($match) {
2926: my $refstatecond=$cond;
2927: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2928: =~/\Q$priv\E\&([^\:]*)/) {
2929: $thisallowed.=$1;
2930: $uri=$refuri;
2931: $statecond=$refstatecond;
2932: }
2933: }
2934: }
2935: }
2936: }
2937:
2938: #
2939: # Gathered now: all privileges that could apply, and condition number
2940: #
2941: #
2942: # Full or no access?
2943: #
2944:
2945: if ($thisallowed=~/F/) {
2946: return 'F';
2947: }
2948:
2949: unless ($thisallowed) {
2950: return '';
2951: }
2952:
2953: # Restrictions exist, deal with them
2954: #
2955: # C:according to course preferences
2956: # R:according to resource settings
2957: # L:unless locked
2958: # X:according to user session state
2959: #
2960:
2961: # Possibly locked functionality, check all courses
2962: # Locks might take effect only after 10 minutes cache expiration for other
2963: # courses, and 2 minutes for current course
2964:
2965: my $envkey;
2966: if ($thisallowed=~/L/) {
2967: foreach $envkey (keys %ENV) {
2968: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2969: my $courseid=$2;
2970: my $roleid=$1.'.'.$2;
2971: $courseid=~s/^\///;
2972: my $expiretime=600;
2973: if ($ENV{'request.role'} eq $roleid) {
2974: $expiretime=120;
2975: }
2976: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2977: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2978: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2979: &coursedescription($courseid);
2980: }
2981: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
2982: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2983: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2984: &log($ENV{'user.domain'},$ENV{'user.name'},
2985: $ENV{'user.home'},
2986: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2987: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2988: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2989: return '';
2990: }
2991: }
2992: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
2993: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2994: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2995: &log($ENV{'user.domain'},$ENV{'user.name'},
2996: $ENV{'user.home'},
2997: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2998: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2999: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
3000: return '';
3001: }
3002: }
3003: }
3004: }
3005: }
3006:
3007: #
3008: # Rest of the restrictions depend on selected course
3009: #
3010:
3011: unless ($ENV{'request.course.id'}) {
3012: return '1';
3013: }
3014:
3015: #
3016: # Now user is definitely in a course
3017: #
3018:
3019:
3020: # Course preferences
3021:
3022: if ($thisallowed=~/C/) {
3023: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
3024: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
3025: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
3026: =~/\Q$rolecode\E/) {
3027: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3028: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3029: $ENV{'request.course.id'});
3030: return '';
3031: }
3032:
3033: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
3034: =~/\Q$unamedom\E/) {
3035: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3036: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3037: $ENV{'request.course.id'});
3038: return '';
3039: }
3040: }
3041:
3042: # Resource preferences
3043:
3044: if ($thisallowed=~/R/) {
3045: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
3046: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3047: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3048: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3049: return '';
3050: }
3051: }
3052:
3053: # Restricted by state or randomout?
3054:
3055: if ($thisallowed=~/X/) {
3056: if ($ENV{'acc.randomout'}) {
3057: my $symb=&symbread($uri,1);
3058: if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3059: return '';
3060: }
3061: }
3062: if (&condval($statecond)) {
3063: return '2';
3064: } else {
3065: return '';
3066: }
3067: }
3068:
3069: return 'F';
3070: }
3071:
3072: # --------------------------------------------------- Is a resource on the map?
3073:
3074: sub is_on_map {
3075: my $uri=&declutter(shift);
3076: $uri=~s/\.\d+\.(\w+)$/\.$1/;
3077: my @uriparts=split(/\//,$uri);
3078: my $filename=$uriparts[$#uriparts];
3079: my $pathname=$uri;
3080: $pathname=~s|/\Q$filename\E$||;
3081: $pathname=~s/^adm\/wrapper\///;
3082: #Trying to find the conditional for the file
3083: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
3084: /\&\Q$filename\E\:([\d\|]+)\&/);
3085: if ($match) {
3086: return (1,$1);
3087: } else {
3088: return (0,0);
3089: }
3090: }
3091:
3092: # --------------------------------------------------------- Get symb from alias
3093:
3094: sub get_symb_from_alias {
3095: my $symb=shift;
3096: my ($map,$resid,$url)=&decode_symb($symb);
3097: # Already is a symb
3098: if ($url) { return $symb; }
3099: # Must be an alias
3100: my $aliassymb='';
3101: my %bighash;
3102: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3103: &GDBM_READER(),0640)) {
3104: my $rid=$bighash{'mapalias_'.$symb};
3105: if ($rid) {
3106: my ($mapid,$resid)=split(/\./,$rid);
3107: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3108: $resid,$bighash{'src_'.$rid});
3109: }
3110: untie %bighash;
3111: }
3112: return $aliassymb;
3113: }
3114:
3115: # ----------------------------------------------------------------- Define Role
3116:
3117: sub definerole {
3118: if (allowed('mcr','/')) {
3119: my ($rolename,$sysrole,$domrole,$courole)=@_;
3120: foreach (split(':',$sysrole)) {
3121: my ($crole,$cqual)=split(/\&/,$_);
3122: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3123: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3124: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3125: return "refused:s:$crole&$cqual";
3126: }
3127: }
3128: }
3129: foreach (split(':',$domrole)) {
3130: my ($crole,$cqual)=split(/\&/,$_);
3131: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3132: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3133: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3134: return "refused:d:$crole&$cqual";
3135: }
3136: }
3137: }
3138: foreach (split(':',$courole)) {
3139: my ($crole,$cqual)=split(/\&/,$_);
3140: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3141: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3142: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3143: return "refused:c:$crole&$cqual";
3144: }
3145: }
3146: }
3147: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3148: "$ENV{'user.domain'}:$ENV{'user.name'}:".
3149: "rolesdef_$rolename=".
3150: escape($sysrole.'_'.$domrole.'_'.$courole);
3151: return reply($command,$ENV{'user.home'});
3152: } else {
3153: return 'refused';
3154: }
3155: }
3156:
3157: # ---------------- Make a metadata query against the network of library servers
3158:
3159: sub metadata_query {
3160: my ($query,$custom,$customshow,$server_array)=@_;
3161: my %rhash;
3162: my @server_list = (defined($server_array) ? @$server_array
3163: : keys(%libserv) );
3164: for my $server (@server_list) {
3165: unless ($custom or $customshow) {
3166: my $reply=&reply("querysend:".&escape($query),$server);
3167: $rhash{$server}=$reply;
3168: }
3169: else {
3170: my $reply=&reply("querysend:".&escape($query).':'.
3171: &escape($custom).':'.&escape($customshow),
3172: $server);
3173: $rhash{$server}=$reply;
3174: }
3175: }
3176: return \%rhash;
3177: }
3178:
3179: # ----------------------------------------- Send log queries and wait for reply
3180:
3181: sub log_query {
3182: my ($uname,$udom,$query,%filters)=@_;
3183: my $uhome=&homeserver($uname,$udom);
3184: if ($uhome eq 'no_host') { return 'error: no_host'; }
3185: my $uhost=$hostname{$uhome};
3186: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3187: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3188: $uhome);
3189: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3190: return get_query_reply($queryid);
3191: }
3192:
3193: # ------- Request retrieval of institutional classlists for course(s)
3194:
3195: sub fetch_enrollment_query {
3196: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3197: my $homeserver;
3198: my $maxtries = 1;
3199: if ($context eq 'automated') {
3200: $homeserver = $perlvar{'lonHostID'};
3201: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3202: } else {
3203: $homeserver = &homeserver($cnum,$dom);
3204: }
3205: my $host=$hostname{$homeserver};
3206: my $cmd = '';
3207: foreach (keys %{$affiliatesref}) {
3208: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3209: }
3210: $cmd =~ s/%%$//;
3211: $cmd = &escape($cmd);
3212: my $query = 'fetchenrollment';
3213: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$ENV{'user.name'}.':'.$cmd,$homeserver);
3214: unless ($queryid=~/^\Q$host\E\_/) {
3215: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3216: return 'error: '.$queryid;
3217: }
3218: my $reply = &get_query_reply($queryid);
3219: my $tries = 1;
3220: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3221: $reply = &get_query_reply($queryid);
3222: $tries ++;
3223: }
3224: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3225: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$ENV{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3226: } else {
3227: my @responses = split/:/,$reply;
3228: if ($homeserver eq $perlvar{'lonHostID'}) {
3229: foreach (@responses) {
3230: my ($key,$value) = split/=/,$_;
3231: $$replyref{$key} = $value;
3232: }
3233: } else {
3234: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3235: foreach (@responses) {
3236: my ($key,$value) = split/=/,$_;
3237: $$replyref{$key} = $value;
3238: if ($value > 0) {
3239: foreach (@{$$affiliatesref{$key}}) {
3240: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3241: my $destname = $pathname.'/'.$filename;
3242: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3243: if ($xml_classlist =~ /^error/) {
3244: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3245: } else {
3246: if ( open(FILE,">$destname") ) {
3247: print FILE &unescape($xml_classlist);
3248: close(FILE);
3249: } else {
3250: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3251: }
3252: }
3253: }
3254: }
3255: }
3256: }
3257: return 'ok';
3258: }
3259: return 'error';
3260: }
3261:
3262: sub get_query_reply {
3263: my $queryid=shift;
3264: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3265: my $reply='';
3266: for (1..100) {
3267: sleep 2;
3268: if (-e $replyfile.'.end') {
3269: if (open(my $fh,$replyfile)) {
3270: $reply.=<$fh>;
3271: close($fh);
3272: } else { return 'error: reply_file_error'; }
3273: return &unescape($reply);
3274: }
3275: }
3276: return 'timeout:'.$queryid;
3277: }
3278:
3279: sub courselog_query {
3280: #
3281: # possible filters:
3282: # url: url or symb
3283: # username
3284: # domain
3285: # action: view, submit, grade
3286: # start: timestamp
3287: # end: timestamp
3288: #
3289: my (%filters)=@_;
3290: unless ($ENV{'request.course.id'}) { return 'no_course'; }
3291: if ($filters{'url'}) {
3292: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3293: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3294: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3295: }
3296: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
3297: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
3298: return &log_query($cname,$cdom,'courselog',%filters);
3299: }
3300:
3301: sub userlog_query {
3302: my ($uname,$udom,%filters)=@_;
3303: return &log_query($uname,$udom,'userlog',%filters);
3304: }
3305:
3306: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3307:
3308: sub auto_run {
3309: my ($cnum,$cdom) = @_;
3310: my $homeserver = &homeserver($cnum,$cdom);
3311: my $response = &reply('autorun:'.$cdom,$homeserver);
3312: return $response;
3313: }
3314:
3315: sub auto_get_sections {
3316: my ($cnum,$cdom,$inst_coursecode) = @_;
3317: my $homeserver = &homeserver($cnum,$cdom);
3318: my @secs = ();
3319: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3320: unless ($response eq 'refused') {
3321: @secs = split/:/,$response;
3322: }
3323: return @secs;
3324: }
3325:
3326: sub auto_new_course {
3327: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3328: my $homeserver = &homeserver($cnum,$cdom);
3329: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3330: return $response;
3331: }
3332:
3333: sub auto_validate_courseID {
3334: my ($cnum,$cdom,$inst_course_id) = @_;
3335: my $homeserver = &homeserver($cnum,$cdom);
3336: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3337: return $response;
3338: }
3339:
3340: sub auto_create_password {
3341: my ($cnum,$cdom,$authparam) = @_;
3342: my $homeserver = &homeserver($cnum,$cdom);
3343: my $create_passwd = 0;
3344: my $authchk = '';
3345: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3346: if ($response eq 'refused') {
3347: $authchk = 'refused';
3348: } else {
3349: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3350: }
3351: return ($authparam,$create_passwd,$authchk);
3352: }
3353:
3354: sub auto_instcode_format {
3355: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3356: my $courses = '';
3357: my $homeserver;
3358: if ($caller eq 'global') {
3359: $homeserver = $perlvar{'lonHostID'};
3360: } else {
3361: $homeserver = &homeserver($caller,$codedom);
3362: }
3363: my $host=$hostname{$homeserver};
3364: foreach (keys %{$instcodes}) {
3365: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3366: }
3367: chop($courses);
3368: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3369: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3370: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3371: %{$codes} = &str2hash($codes_str);
3372: @{$codetitles} = &str2array($codetitles_str);
3373: %{$cat_titles} = &str2hash($cat_titles_str);
3374: %{$cat_order} = &str2hash($cat_order_str);
3375: return 'ok';
3376: }
3377: return $response;
3378: }
3379:
3380: # ------------------------------------------------------------------ Plain Text
3381:
3382: sub plaintext {
3383: my $short=shift;
3384: return &mt($prp{$short});
3385: }
3386:
3387: # ----------------------------------------------------------------- Assign Role
3388:
3389: sub assignrole {
3390: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3391: my $mrole;
3392: if ($role =~ /^cr\//) {
3393: my $cwosec=$url;
3394: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3395: unless (&allowed('ccr',$cwosec)) {
3396: &logthis('Refused custom assignrole: '.
3397: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3398: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3399: return 'refused';
3400: }
3401: $mrole='cr';
3402: } else {
3403: my $cwosec=$url;
3404: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3405: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3406: &logthis('Refused assignrole: '.
3407: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3408: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3409: return 'refused';
3410: }
3411: $mrole=$role;
3412: }
3413: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3414: "$udom:$uname:$url".'_'."$mrole=$role";
3415: if ($end) { $command.='_'.$end; }
3416: if ($start) {
3417: if ($end) {
3418: $command.='_'.$start;
3419: } else {
3420: $command.='_0_'.$start;
3421: }
3422: }
3423: # actually delete
3424: if ($deleteflag) {
3425: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3426: # modify command to delete the role
3427: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
3428: "$udom:$uname:$url".'_'."$mrole";
3429: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
3430: # set start and finish to negative values for userrolelog
3431: $start=-1;
3432: $end=-1;
3433: }
3434: }
3435: # send command
3436: my $answer=&reply($command,&homeserver($uname,$udom));
3437: # log new user role if status is ok
3438: if ($answer eq 'ok') {
3439: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3440: }
3441: return $answer;
3442: }
3443:
3444: # -------------------------------------------------- Modify user authentication
3445: # Overrides without validation
3446:
3447: sub modifyuserauth {
3448: my ($udom,$uname,$umode,$upass)=@_;
3449: my $uhome=&homeserver($uname,$udom);
3450: unless (&allowed('mau',$udom)) { return 'refused'; }
3451: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3452: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3453: ' in domain '.$ENV{'request.role.domain'});
3454: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3455: &escape($upass),$uhome);
3456: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3457: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3458: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3459: &log($udom,,$uname,$uhome,
3460: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3461: $ENV{'user.name'}.', '.$umode.
3462: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3463: unless ($reply eq 'ok') {
3464: &logthis('Authentication mode error: '.$reply);
3465: return 'error: '.$reply;
3466: }
3467: return 'ok';
3468: }
3469:
3470: # --------------------------------------------------------------- Modify a user
3471:
3472: sub modifyuser {
3473: my ($udom, $uname, $uid,
3474: $umode, $upass, $first,
3475: $middle, $last, $gene,
3476: $forceid, $desiredhome, $email)=@_;
3477: $udom=~s/\W//g;
3478: $uname=~s/\W//g;
3479: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3480: $umode.', '.$first.', '.$middle.', '.
3481: $last.', '.$gene.'(forceid: '.$forceid.')'.
3482: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3483: ' desiredhome not specified').
3484: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3485: ' in domain '.$ENV{'request.role.domain'});
3486: my $uhome=&homeserver($uname,$udom,'true');
3487: # ----------------------------------------------------------------- Create User
3488: if (($uhome eq 'no_host') &&
3489: (($umode && $upass) || ($umode eq 'localauth'))) {
3490: my $unhome='';
3491: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3492: $unhome = $desiredhome;
3493: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
3494: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
3495: } else { # load balancing routine for determining $unhome
3496: my $tryserver;
3497: my $loadm=10000000;
3498: foreach $tryserver (keys %libserv) {
3499: if ($hostdom{$tryserver} eq $udom) {
3500: my $answer=reply('load',$tryserver);
3501: if (($answer=~/\d+/) && ($answer<$loadm)) {
3502: $loadm=$answer;
3503: $unhome=$tryserver;
3504: }
3505: }
3506: }
3507: }
3508: if (($unhome eq '') || ($unhome eq 'no_host')) {
3509: return 'error: unable to find a home server for '.$uname.
3510: ' in domain '.$udom;
3511: }
3512: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3513: &escape($upass),$unhome);
3514: unless ($reply eq 'ok') {
3515: return 'error: '.$reply;
3516: }
3517: $uhome=&homeserver($uname,$udom,'true');
3518: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3519: return 'error: unable verify users home machine.';
3520: }
3521: } # End of creation of new user
3522: # ---------------------------------------------------------------------- Add ID
3523: if ($uid) {
3524: $uid=~tr/A-Z/a-z/;
3525: my %uidhash=&idrget($udom,$uname);
3526: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3527: && (!$forceid)) {
3528: unless ($uid eq $uidhash{$uname}) {
3529: return 'error: user id "'.$uid.'" does not match '.
3530: 'current user id "'.$uidhash{$uname}.'".';
3531: }
3532: } else {
3533: &idput($udom,($uname => $uid));
3534: }
3535: }
3536: # -------------------------------------------------------------- Add names, etc
3537: my @tmp=&get('environment',
3538: ['firstname','middlename','lastname','generation'],
3539: $udom,$uname);
3540: my %names;
3541: if ($tmp[0] =~ m/^error:.*/) {
3542: %names=();
3543: } else {
3544: %names = @tmp;
3545: }
3546: #
3547: # Make sure to not trash student environment if instructor does not bother
3548: # to supply name and email information
3549: #
3550: if ($first) { $names{'firstname'} = $first; }
3551: if (defined($middle)) { $names{'middlename'} = $middle; }
3552: if ($last) { $names{'lastname'} = $last; }
3553: if (defined($gene)) { $names{'generation'} = $gene; }
3554: if ($email) { $names{'notification'} = $email;
3555: $names{'critnotification'} = $email; }
3556:
3557: my $reply = &put('environment', \%names, $udom,$uname);
3558: if ($reply ne 'ok') { return 'error: '.$reply; }
3559: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3560: $umode.', '.$first.', '.$middle.', '.
3561: $last.', '.$gene.' by '.
3562: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3563: return 'ok';
3564: }
3565:
3566: # -------------------------------------------------------------- Modify student
3567:
3568: sub modifystudent {
3569: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3570: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
3571: if (!$cid) {
3572: unless ($cid=$ENV{'request.course.id'}) {
3573: return 'not_in_class';
3574: }
3575: }
3576: # --------------------------------------------------------------- Make the user
3577: my $reply=&modifyuser
3578: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3579: $desiredhome,$email);
3580: unless ($reply eq 'ok') { return $reply; }
3581: # This will cause &modify_student_enrollment to get the uid from the
3582: # students environment
3583: $uid = undef if (!$forceid);
3584: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3585: $gene,$usec,$end,$start,$type,$locktype,$cid);
3586: return $reply;
3587: }
3588:
3589: sub modify_student_enrollment {
3590: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
3591: my ($cdom,$cnum,$chome);
3592: if (!$cid) {
3593: unless ($cid=$ENV{'request.course.id'}) {
3594: return 'not_in_class';
3595: }
3596: $cdom=$ENV{'course.'.$cid.'.domain'};
3597: $cnum=$ENV{'course.'.$cid.'.num'};
3598: } else {
3599: ($cdom,$cnum)=split(/_/,$cid);
3600: }
3601: $chome=$ENV{'course.'.$cid.'.home'};
3602: if (!$chome) {
3603: $chome=&homeserver($cnum,$cdom);
3604: }
3605: if (!$chome) { return 'unknown_course'; }
3606: # Make sure the user exists
3607: my $uhome=&homeserver($uname,$udom);
3608: if (($uhome eq '') || ($uhome eq 'no_host')) {
3609: return 'error: no such user';
3610: }
3611: # Get student data if we were not given enough information
3612: if (!defined($first) || $first eq '' ||
3613: !defined($last) || $last eq '' ||
3614: !defined($uid) || $uid eq '' ||
3615: !defined($middle) || $middle eq '' ||
3616: !defined($gene) || $gene eq '') {
3617: # They did not supply us with enough data to enroll the student, so
3618: # we need to pick up more information.
3619: my %tmp = &get('environment',
3620: ['firstname','middlename','lastname', 'generation','id']
3621: ,$udom,$uname);
3622:
3623: #foreach (keys(%tmp)) {
3624: # &logthis("key $_ = ".$tmp{$_});
3625: #}
3626: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3627: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3628: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3629: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3630: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3631: }
3632: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
3633: my $reply=cput('classlist',
3634: {"$uname:$udom" =>
3635: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
3636: $cdom,$cnum);
3637: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3638: return 'error: '.$reply;
3639: }
3640: # Add student role to user
3641: my $uurl='/'.$cid;
3642: $uurl=~s/\_/\//g;
3643: if ($usec) {
3644: $uurl.='/'.$usec;
3645: }
3646: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3647: }
3648:
3649: sub format_name {
3650: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
3651: my $name;
3652: if ($first ne 'lastname') {
3653: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
3654: } else {
3655: if ($lastname=~/\S/) {
3656: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
3657: $name=~s/\s+,/,/;
3658: } else {
3659: $name.= $firstname.' '.$middlename.' '.$generation;
3660: }
3661: }
3662: $name=~s/^\s+//;
3663: $name=~s/\s+$//;
3664: $name=~s/\s+/ /g;
3665: return $name;
3666: }
3667:
3668: # ------------------------------------------------- Write to course preferences
3669:
3670: sub writecoursepref {
3671: my ($courseid,%prefs)=@_;
3672: $courseid=~s/^\///;
3673: $courseid=~s/\_/\//g;
3674: my ($cdomain,$cnum)=split(/\//,$courseid);
3675: my $chome=homeserver($cnum,$cdomain);
3676: if (($chome eq '') || ($chome eq 'no_host')) {
3677: return 'error: no such course';
3678: }
3679: my $cstring='';
3680: foreach (keys %prefs) {
3681: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3682: }
3683: $cstring=~s/\&$//;
3684: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3685: }
3686:
3687: # ---------------------------------------------------------- Make/modify course
3688:
3689: sub createcourse {
3690: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code)=@_;
3691: $url=&declutter($url);
3692: my $cid='';
3693: unless (&allowed('ccc',$udom)) {
3694: return 'refused';
3695: }
3696: # ------------------------------------------------------------------- Create ID
3697: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3698: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3699: # ----------------------------------------------- Make sure that does not exist
3700: my $uhome=&homeserver($uname,$udom,'true');
3701: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3702: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3703: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3704: $uhome=&homeserver($uname,$udom,'true');
3705: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3706: return 'error: unable to generate unique course-ID';
3707: }
3708: }
3709: # ------------------------------------------------ Check supplied server name
3710: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3711: if (! exists($libserv{$course_server})) {
3712: return 'error:bad server name '.$course_server;
3713: }
3714: # ------------------------------------------------------------- Make the course
3715: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3716: $course_server);
3717: unless ($reply eq 'ok') { return 'error: '.$reply; }
3718: $uhome=&homeserver($uname,$udom,'true');
3719: if (($uhome eq '') || ($uhome eq 'no_host')) {
3720: return 'error: no such course';
3721: }
3722: # ----------------------------------------------------------------- Course made
3723: # log existence
3724: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
3725: '='.&escape($inst_code),$uhome);
3726: &flushcourselogs();
3727: # set toplevel url
3728: my $topurl=$url;
3729: unless ($nonstandard) {
3730: # ------------------------------------------ For standard courses, make top url
3731: my $mapurl=&clutter($url);
3732: if ($mapurl eq '/res/') { $mapurl=''; }
3733: $ENV{'form.initmap'}=(<<ENDINITMAP);
3734: <map>
3735: <resource id="1" type="start"></resource>
3736: <resource id="2" src="$mapurl"></resource>
3737: <resource id="3" type="finish"></resource>
3738: <link index="1" from="1" to="2"></link>
3739: <link index="2" from="2" to="3"></link>
3740: </map>
3741: ENDINITMAP
3742: $topurl=&declutter(
3743: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3744: );
3745: }
3746: # ----------------------------------------------------------- Write preferences
3747: &writecoursepref($udom.'_'.$uname,
3748: ('description' => $description,
3749: 'url' => $topurl));
3750: return '/'.$udom.'/'.$uname;
3751: }
3752:
3753: # ---------------------------------------------------------- Assign Custom Role
3754:
3755: sub assigncustomrole {
3756: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3757: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3758: $end,$start,$deleteflag);
3759: }
3760:
3761: # ----------------------------------------------------------------- Revoke Role
3762:
3763: sub revokerole {
3764: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3765: my $now=time;
3766: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3767: }
3768:
3769: # ---------------------------------------------------------- Revoke Custom Role
3770:
3771: sub revokecustomrole {
3772: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3773: my $now=time;
3774: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3775: $deleteflag);
3776: }
3777:
3778: # ------------------------------------------------------------ Disk usage
3779: sub diskusage {
3780: my ($udom,$uname,$directoryRoot)=@_;
3781: $directoryRoot =~ s/\/$//;
3782: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
3783: return $listing;
3784: }
3785:
3786: sub is_locked {
3787: my ($file_name, $domain, $user) = @_;
3788: my @check;
3789: my $is_locked;
3790: push @check, $file_name;
3791: my %locked = &Apache::lonnet::get('file_permissions',\@check,
3792: $ENV{'user.domain'},$ENV{'user.name'});
3793: if (ref($locked{$file_name}) eq 'ARRAY') {
3794: $is_locked = 'true';
3795: } else {
3796: $is_locked = 'false';
3797: }
3798: }
3799:
3800: # ------------------------------------------------------------- Mark as Read Only
3801:
3802: sub mark_as_readonly {
3803: my ($domain,$user,$files,$what) = @_;
3804: my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
3805: foreach my $file (@{$files}) {
3806: push(@{$current_permissions{$file}},$what);
3807: }
3808: &Apache::lonnet::put('file_permissions',\%current_permissions,$domain,$user);
3809: return;
3810: }
3811:
3812: #--------------------------------------------------------------Get Marked as Read Only
3813:
3814: sub get_marked_as_readonly {
3815: my ($domain,$user,$what) = @_;
3816: my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
3817: my @readonly_files;
3818: while (my ($file_name,$value) = each(%current_permissions)) {
3819: if (ref($value) eq "ARRAY"){
3820: foreach my $stored_what (@{$value}) {
3821: if ($stored_what eq $what) {
3822: push(@readonly_files, $file_name);
3823: } elsif (!defined($what)) {
3824: push(@readonly_files, $file_name);
3825: }
3826: }
3827: }
3828: }
3829: return @readonly_files;
3830: }
3831:
3832: # ------------------------------------------------------------ Unmark as Read Only
3833:
3834: sub unmark_as_readonly {
3835: # unmarks all files locked by $what
3836: # for portfolio submissions, $what contains $crsid and $symb
3837: my ($domain,$user,$what) = @_;
3838: my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
3839: my @readonly_files = &Apache::lonnet::get_marked_as_readonly($domain,$user,$what);
3840: foreach my $file(@readonly_files){
3841: my $current_locks = $current_permissions{$file};
3842: my @new_locks;
3843: my @del_keys;
3844: if (ref($current_locks) eq "ARRAY"){
3845: foreach my $locker (@{$current_locks}) {
3846: unless ($locker eq $what) {
3847: push(@new_locks, $what);
3848: }
3849: }
3850: if (@new_locks > 0) {
3851: $current_permissions{$file} = \@new_locks;
3852: } else {
3853: push(@del_keys, $file);
3854: &Apache::lonnet::del('file_permissions',\@del_keys, $domain, $user);
3855: delete $current_permissions{$file};
3856: }
3857: }
3858: }
3859: &Apache::lonnet::put('file_permissions',\%current_permissions,$domain,$user);
3860: return;
3861: }
3862:
3863: # ------------------------------------------------------------ Directory lister
3864:
3865: sub dirlist {
3866: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3867:
3868: $uri=~s/^\///;
3869: $uri=~s/\/$//;
3870: my ($udom, $uname);
3871: (undef,$udom,$uname)=split(/\//,$uri);
3872: if(defined($userdomain)) {
3873: $udom = $userdomain;
3874: }
3875: if(defined($username)) {
3876: $uname = $username;
3877: }
3878:
3879: my $dirRoot = $perlvar{'lonDocRoot'};
3880: if(defined($alternateDirectoryRoot)) {
3881: $dirRoot = $alternateDirectoryRoot;
3882: $dirRoot =~ s/\/$//;
3883: }
3884:
3885: if($udom) {
3886: if($uname) {
3887: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3888: homeserver($uname,$udom));
3889: return split(/:/,$listing);
3890: } elsif(!defined($alternateDirectoryRoot)) {
3891: my $tryserver;
3892: my %allusers=();
3893: foreach $tryserver (keys %libserv) {
3894: if($hostdom{$tryserver} eq $udom) {
3895: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3896: $udom, $tryserver);
3897: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3898: && ($listing ne 'con_lost')) {
3899: foreach (split(/:/,$listing)) {
3900: my ($entry,@stat)=split(/&/,$_);
3901: $allusers{$entry}=1;
3902: }
3903: }
3904: }
3905: }
3906: my $alluserstr='';
3907: foreach (sort keys %allusers) {
3908: $alluserstr.=$_.'&user:';
3909: }
3910: $alluserstr=~s/:$//;
3911: return split(/:/,$alluserstr);
3912: } else {
3913: my @emptyResults = ();
3914: push(@emptyResults, 'missing user name');
3915: return split(':',@emptyResults);
3916: }
3917: } elsif(!defined($alternateDirectoryRoot)) {
3918: my $tryserver;
3919: my %alldom=();
3920: foreach $tryserver (keys %libserv) {
3921: $alldom{$hostdom{$tryserver}}=1;
3922: }
3923: my $alldomstr='';
3924: foreach (sort keys %alldom) {
3925: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3926: }
3927: $alldomstr=~s/:$//;
3928: return split(/:/,$alldomstr);
3929: } else {
3930: my @emptyResults = ();
3931: push(@emptyResults, 'missing domain');
3932: return split(':',@emptyResults);
3933: }
3934: }
3935:
3936: # --------------------------------------------- GetFileTimestamp
3937: # This function utilizes dirlist and returns the date stamp for
3938: # when it was last modified. It will also return an error of -1
3939: # if an error occurs
3940:
3941: ##
3942: ## FIXME: This subroutine assumes its caller knows something about the
3943: ## directory structure of the home server for the student ($root).
3944: ## Not a good assumption to make. Since this is for looking up files
3945: ## in user directories, the full path should be constructed by lond, not
3946: ## whatever machine we request data from.
3947: ##
3948: sub GetFileTimestamp {
3949: my ($studentDomain,$studentName,$filename,$root)=@_;
3950: $studentDomain=~s/\W//g;
3951: $studentName=~s/\W//g;
3952: my $subdir=$studentName.'__';
3953: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3954: my $proname="$studentDomain/$subdir/$studentName";
3955: $proname .= '/'.$filename;
3956: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3957: $studentName, $root);
3958: my @stats = split('&', $fileStat);
3959: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
3960: # @stats contains first the filename, then the stat output
3961: return $stats[10]; # so this is 10 instead of 9.
3962: } else {
3963: return -1;
3964: }
3965: }
3966:
3967: # -------------------------------------------------------- Value of a Condition
3968:
3969: sub directcondval {
3970: my $number=shift;
3971: if (!defined($ENV{'user.state.'.$ENV{'request.course.id'}})) {
3972: &Apache::lonuserstate::evalstate();
3973: }
3974: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3975: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3976: } else {
3977: return 2;
3978: }
3979: }
3980:
3981: sub condval {
3982: my $condidx=shift;
3983: my $result=0;
3984: my $allpathcond='';
3985: foreach (split(/\|/,$condidx)) {
3986: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3987: $allpathcond.=
3988: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3989: }
3990: }
3991: $allpathcond=~s/\|$//;
3992: if ($ENV{'request.course.id'}) {
3993: if ($allpathcond) {
3994: my $operand='|';
3995: my @stack;
3996: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
3997: if ($_ eq '(') {
3998: push @stack,($operand,$result)
3999: } elsif ($_ eq ')') {
4000: my $before=pop @stack;
4001: if (pop @stack eq '&') {
4002: $result=$result>$before?$before:$result;
4003: } else {
4004: $result=$result>$before?$result:$before;
4005: }
4006: } elsif (($_ eq '&') || ($_ eq '|')) {
4007: $operand=$_;
4008: } else {
4009: my $new=directcondval($_);
4010: if ($operand eq '&') {
4011: $result=$result>$new?$new:$result;
4012: } else {
4013: $result=$result>$new?$result:$new;
4014: }
4015: }
4016: }
4017: }
4018: }
4019: return $result;
4020: }
4021:
4022: # ---------------------------------------------------- Devalidate courseresdata
4023:
4024: sub devalidatecourseresdata {
4025: my ($coursenum,$coursedomain)=@_;
4026: my $hashid=$coursenum.':'.$coursedomain;
4027: &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
4028: }
4029:
4030: # --------------------------------------------------- Course Resourcedata Query
4031:
4032: sub courseresdata {
4033: my ($coursenum,$coursedomain,@which)=@_;
4034: my $coursehom=&homeserver($coursenum,$coursedomain);
4035: my $hashid=$coursenum.':'.$coursedomain;
4036: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
4037: unless (defined($cached)) {
4038: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4039: $result=\%dumpreply;
4040: my ($tmp) = keys(%dumpreply);
4041: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4042: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
4043: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4044: return $tmp;
4045: } elsif ($tmp =~ /^(error)/) {
4046: $result=undef;
4047: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
4048: }
4049: }
4050: foreach my $item (@which) {
4051: if (defined($result->{$item})) {
4052: return $result->{$item};
4053: }
4054: }
4055: return undef;
4056: }
4057:
4058: #
4059: # EXT resource caching routines
4060: #
4061:
4062: sub clear_EXT_cache_status {
4063: &delenv('cache.EXT.');
4064: }
4065:
4066: sub EXT_cache_status {
4067: my ($target_domain,$target_user) = @_;
4068: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4069: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
4070: # We know already the user has no data
4071: return 1;
4072: } else {
4073: return 0;
4074: }
4075: }
4076:
4077: sub EXT_cache_set {
4078: my ($target_domain,$target_user) = @_;
4079: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4080: &appenv($cachename => time);
4081: }
4082:
4083: # --------------------------------------------------------- Value of a Variable
4084: sub EXT {
4085: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4086:
4087: unless ($varname) { return ''; }
4088: #get real user name/domain, courseid and symb
4089: my $courseid;
4090: my $publicuser;
4091: if ($symbparm) {
4092: $symbparm=&get_symb_from_alias($symbparm);
4093: }
4094: if (!($uname && $udom)) {
4095: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4096: &Apache::lonxml::whichuser($symbparm);
4097: if (!$symbparm) { $symbparm=$cursymb; }
4098: } else {
4099: $courseid=$ENV{'request.course.id'};
4100: }
4101: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4102: my $rest;
4103: if (defined($therest[0])) {
4104: $rest=join('.',@therest);
4105: } else {
4106: $rest='';
4107: }
4108:
4109: my $qualifierrest=$qualifier;
4110: if ($rest) { $qualifierrest.='.'.$rest; }
4111: my $spacequalifierrest=$space;
4112: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4113: if ($realm eq 'user') {
4114: # --------------------------------------------------------------- user.resource
4115: if ($space eq 'resource') {
4116: if (defined($Apache::lonhomework::parsing_a_problem)) {
4117: return $Apache::lonhomework::history{$qualifierrest};
4118: } else {
4119: my %restored;
4120: if ($publicuser || $ENV{'request.state'} eq 'construct') {
4121: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4122: } else {
4123: %restored=&restore($symbparm,$courseid,$udom,$uname);
4124: }
4125: return $restored{$qualifierrest};
4126: }
4127: # ----------------------------------------------------------------- user.access
4128: } elsif ($space eq 'access') {
4129: # FIXME - not supporting calls for a specific user
4130: return &allowed($qualifier,$rest);
4131: # ------------------------------------------ user.preferences, user.environment
4132: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4133: if (($uname eq $ENV{'user.name'}) &&
4134: ($udom eq $ENV{'user.domain'})) {
4135: return $ENV{join('.',('environment',$qualifierrest))};
4136: } else {
4137: my %returnhash;
4138: if (!$publicuser) {
4139: %returnhash=&userenvironment($udom,$uname,
4140: $qualifierrest);
4141: }
4142: return $returnhash{$qualifierrest};
4143: }
4144: # ----------------------------------------------------------------- user.course
4145: } elsif ($space eq 'course') {
4146: # FIXME - not supporting calls for a specific user
4147: return $ENV{join('.',('request.course',$qualifier))};
4148: # ------------------------------------------------------------------- user.role
4149: } elsif ($space eq 'role') {
4150: # FIXME - not supporting calls for a specific user
4151: my ($role,$where)=split(/\./,$ENV{'request.role'});
4152: if ($qualifier eq 'value') {
4153: return $role;
4154: } elsif ($qualifier eq 'extent') {
4155: return $where;
4156: }
4157: # ----------------------------------------------------------------- user.domain
4158: } elsif ($space eq 'domain') {
4159: return $udom;
4160: # ------------------------------------------------------------------- user.name
4161: } elsif ($space eq 'name') {
4162: return $uname;
4163: # ---------------------------------------------------- Any other user namespace
4164: } else {
4165: my %reply;
4166: if (!$publicuser) {
4167: %reply=&get($space,[$qualifierrest],$udom,$uname);
4168: }
4169: return $reply{$qualifierrest};
4170: }
4171: } elsif ($realm eq 'query') {
4172: # ---------------------------------------------- pull stuff out of query string
4173: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4174: [$spacequalifierrest]);
4175: return $ENV{'form.'.$spacequalifierrest};
4176: } elsif ($realm eq 'request') {
4177: # ------------------------------------------------------------- request.browser
4178: if ($space eq 'browser') {
4179: if ($qualifier eq 'textremote') {
4180: if (&mt('textual_remote_display') eq 'on') {
4181: return 1;
4182: } else {
4183: return 0;
4184: }
4185: } else {
4186: return $ENV{'browser.'.$qualifier};
4187: }
4188: # ------------------------------------------------------------ request.filename
4189: } else {
4190: return $ENV{'request.'.$spacequalifierrest};
4191: }
4192: } elsif ($realm eq 'course') {
4193: # ---------------------------------------------------------- course.description
4194: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
4195: } elsif ($realm eq 'resource') {
4196:
4197: my $section;
4198: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
4199: if (!$symbparm) { $symbparm=&symbread(); }
4200: }
4201: if ($symbparm && defined($courseid) &&
4202: $courseid eq $ENV{'request.course.id'}) {
4203:
4204: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4205:
4206: # ----------------------------------------------------- Cascading lookup scheme
4207: my $symbp=$symbparm;
4208: my $mapp=(&decode_symb($symbp))[0];
4209:
4210: my $symbparm=$symbp.'.'.$spacequalifierrest;
4211: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4212:
4213: if (($ENV{'user.name'} eq $uname) &&
4214: ($ENV{'user.domain'} eq $udom)) {
4215: $section=$ENV{'request.course.sec'};
4216: } else {
4217: if (! defined($usection)) {
4218: $section=&getsection($udom,$uname,$courseid);
4219: } else {
4220: $section = $usection;
4221: }
4222: }
4223:
4224: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4225: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4226: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4227:
4228: my $courselevel=$courseid.'.'.$spacequalifierrest;
4229: my $courselevelr=$courseid.'.'.$symbparm;
4230: my $courselevelm=$courseid.'.'.$mapparm;
4231:
4232: # ----------------------------------------------------------- first, check user
4233: #most student don\'t have any data set, check if there is some data
4234: if (! &EXT_cache_status($udom,$uname)) {
4235: my $hashid="$udom:$uname";
4236: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
4237: 'userres');
4238: if (!defined($cached)) {
4239: my %resourcedata=&dump('resourcedata',$udom,$uname);
4240: $result=\%resourcedata;
4241: &do_cache(\%userresdatacache,$hashid,$result,'userres');
4242: }
4243: my ($tmp)=keys(%$result);
4244: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4245: if ($$result{$courselevelr}) {
4246: return $$result{$courselevelr}; }
4247: if ($$result{$courselevelm}) {
4248: return $$result{$courselevelm}; }
4249: if ($$result{$courselevel}) {
4250: return $$result{$courselevel}; }
4251: } else {
4252: #error 2 occurs when the .db doesn't exist
4253: if ($tmp!~/error: 2 /) {
4254: &logthis("<font color=blue>WARNING:".
4255: " Trying to get resource data for ".
4256: $uname." at ".$udom.": ".
4257: $tmp."</font>");
4258: } elsif ($tmp=~/error: 2 /) {
4259: &EXT_cache_set($udom,$uname);
4260: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4261: return $tmp;
4262: }
4263: }
4264: }
4265:
4266: # -------------------------------------------------------- second, check course
4267:
4268: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
4269: $ENV{'course.'.$courseid.'.domain'},
4270: ($seclevelr,$seclevelm,$seclevel,
4271: $courselevelr,$courselevelm,
4272: $courselevel));
4273: if (defined($coursereply)) { return $coursereply; }
4274:
4275: # ------------------------------------------------------ third, check map parms
4276: my %parmhash=();
4277: my $thisparm='';
4278: if (tie(%parmhash,'GDBM_File',
4279: $ENV{'request.course.fn'}.'_parms.db',
4280: &GDBM_READER(),0640)) {
4281: $thisparm=$parmhash{$symbparm};
4282: untie(%parmhash);
4283: }
4284: if ($thisparm) { return $thisparm; }
4285: }
4286: # --------------------------------------------- last, look in resource metadata
4287:
4288: $spacequalifierrest=~s/\./\_/;
4289: my $filename;
4290: if (!$symbparm) { $symbparm=&symbread(); }
4291: if ($symbparm) {
4292: $filename=(&decode_symb($symbparm))[2];
4293: } else {
4294: $filename=$ENV{'request.filename'};
4295: }
4296: my $metadata=&metadata($filename,$spacequalifierrest);
4297: if (defined($metadata)) { return $metadata; }
4298: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4299: if (defined($metadata)) { return $metadata; }
4300:
4301: # ------------------------------------------------------------------ Cascade up
4302: unless ($space eq '0') {
4303: my @parts=split(/_/,$space);
4304: my $id=pop(@parts);
4305: my $part=join('_',@parts);
4306: if ($part eq '') { $part='0'; }
4307: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4308: $symbparm,$udom,$uname,$section,1);
4309: if (defined($partgeneral)) { return $partgeneral; }
4310: }
4311: if ($recurse) { return undef; }
4312: my $pack_def=&packages_tab_default($filename,$varname);
4313: if (defined($pack_def)) { return $pack_def; }
4314:
4315: # ---------------------------------------------------- Any other user namespace
4316: } elsif ($realm eq 'environment') {
4317: # ----------------------------------------------------------------- environment
4318: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
4319: return $ENV{'environment.'.$spacequalifierrest};
4320: } else {
4321: my %returnhash=&userenvironment($udom,$uname,
4322: $spacequalifierrest);
4323: return $returnhash{$spacequalifierrest};
4324: }
4325: } elsif ($realm eq 'system') {
4326: # ----------------------------------------------------------------- system.time
4327: if ($space eq 'time') {
4328: return time;
4329: }
4330: }
4331: return '';
4332: }
4333:
4334: sub packages_tab_default {
4335: my ($uri,$varname)=@_;
4336: my (undef,$part,$name)=split(/\./,$varname);
4337: my $packages=&metadata($uri,'packages');
4338: foreach my $package (split(/,/,$packages)) {
4339: my ($pack_type,$pack_part)=split(/_/,$package,2);
4340: if (defined($packagetab{"$pack_type&$name&default"})) {
4341: return $packagetab{"$pack_type&$name&default"};
4342: }
4343: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4344: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4345: }
4346: }
4347: return undef;
4348: }
4349:
4350: sub add_prefix_and_part {
4351: my ($prefix,$part)=@_;
4352: my $keyroot;
4353: if (defined($prefix) && $prefix !~ /^__/) {
4354: # prefix that has a part already
4355: $keyroot=$prefix;
4356: } elsif (defined($prefix)) {
4357: # prefix that is missing a part
4358: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4359: } else {
4360: # no prefix at all
4361: if (defined($part)) { $keyroot='_'.$part; }
4362: }
4363: return $keyroot;
4364: }
4365:
4366: # ---------------------------------------------------------------- Get metadata
4367:
4368: sub metadata {
4369: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
4370: $uri=&declutter($uri);
4371: # if it is a non metadata possible uri return quickly
4372: if (($uri eq '') ||
4373: (($uri =~ m|^/*adm/|) &&
4374: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
4375: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
4376: ($uri =~ m|home/[^/]+/public_html/|)) {
4377: return undef;
4378: }
4379: my $filename=$uri;
4380: $uri=~s/\.meta$//;
4381: #
4382: # Is the metadata already cached?
4383: # Look at timestamp of caching
4384: # Everything is cached by the main uri, libraries are never directly cached
4385: #
4386: if (!defined($liburi)) {
4387: my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
4388: if (defined($cached)) { return $result->{':'.$what}; }
4389: }
4390: {
4391: #
4392: # Is this a recursive call for a library?
4393: #
4394: if (! exists($metacache{$uri})) {
4395: $metacache{$uri}={};
4396: }
4397: if ($liburi) {
4398: $liburi=&declutter($liburi);
4399: $filename=$liburi;
4400: } else {
4401: &devalidate_cache(\%metacache,$uri,'meta');
4402: }
4403: my %metathesekeys=();
4404: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
4405: my $metastring;
4406: if ($uri !~ m|^uploaded/|) {
4407: my $file=&filelocation('',&clutter($filename));
4408: push(@{$metacache{$uri.'.file'}},$file);
4409: $metastring=&getfile($file);
4410: }
4411: my $parser=HTML::LCParser->new(\$metastring);
4412: my $token;
4413: undef %metathesekeys;
4414: while ($token=$parser->get_token) {
4415: if ($token->[0] eq 'S') {
4416: if (defined($token->[2]->{'package'})) {
4417: #
4418: # This is a package - get package info
4419: #
4420: my $package=$token->[2]->{'package'};
4421: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4422: if (defined($token->[2]->{'id'})) {
4423: $keyroot.='_'.$token->[2]->{'id'};
4424: }
4425: if ($metacache{$uri}->{':packages'}) {
4426: $metacache{$uri}->{':packages'}.=','.$package.$keyroot;
4427: } else {
4428: $metacache{$uri}->{':packages'}=$package.$keyroot;
4429: }
4430: foreach (keys %packagetab) {
4431: my $part=$keyroot;
4432: $part=~s/^\_//;
4433: if ($_=~/^\Q$package\E\&/ ||
4434: $_=~/^\Q$package\E_0\&/) {
4435: my ($pack,$name,$subp)=split(/\&/,$_);
4436: # ignore package.tab specified default values
4437: # here &package_tab_default() will fetch those
4438: if ($subp eq 'default') { next; }
4439: my $value=$packagetab{$_};
4440: my $unikey;
4441: if ($pack =~ /_0$/) {
4442: $unikey='parameter_0_'.$name;
4443: $part=0;
4444: } else {
4445: $unikey='parameter'.$keyroot.'_'.$name;
4446: }
4447: if ($subp eq 'display') {
4448: $value.=' [Part: '.$part.']';
4449: }
4450: $metacache{$uri}->{':'.$unikey.'.part'}=$part;
4451: $metathesekeys{$unikey}=1;
4452: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4453: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4454: }
4455: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4456: $metacache{$uri}->{':'.$unikey}=
4457: $metacache{$uri}->{':'.$unikey.'.default'};
4458: }
4459: }
4460: }
4461: } else {
4462: #
4463: # This is not a package - some other kind of start tag
4464: #
4465: my $entry=$token->[1];
4466: my $unikey;
4467: if ($entry eq 'import') {
4468: $unikey='';
4469: } else {
4470: $unikey=$entry;
4471: }
4472: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4473:
4474: if (defined($token->[2]->{'id'})) {
4475: $unikey.='_'.$token->[2]->{'id'};
4476: }
4477:
4478: if ($entry eq 'import') {
4479: #
4480: # Importing a library here
4481: #
4482: if ($depthcount<20) {
4483: my $location=$parser->get_text('/import');
4484: my $dir=$filename;
4485: $dir=~s|[^/]*$||;
4486: $location=&filelocation($dir,$location);
4487: foreach (sort(split(/\,/,&metadata($uri,'keys',
4488: $location,$unikey,
4489: $depthcount+1)))) {
4490: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4491: $metathesekeys{$_}=1;
4492: }
4493: }
4494: } else {
4495:
4496: if (defined($token->[2]->{'name'})) {
4497: $unikey.='_'.$token->[2]->{'name'};
4498: }
4499: $metathesekeys{$unikey}=1;
4500: foreach (@{$token->[3]}) {
4501: $metacache{$uri}->{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4502: }
4503: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4504: my $default=$metacache{$uri}->{':'.$unikey.'.default'};
4505: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4506: # only ws inside the tag, and not in default, so use default
4507: # as value
4508: $metacache{$uri}->{':'.$unikey}=$default;
4509: } else {
4510: # either something interesting inside the tag or default
4511: # uninteresting
4512: $metacache{$uri}->{':'.$unikey}=$internaltext;
4513: }
4514: # end of not-a-package not-a-library import
4515: }
4516: # end of not-a-package start tag
4517: }
4518: # the next is the end of "start tag"
4519: }
4520: }
4521: my ($extension) = ($uri =~ /\.(\w+)$/);
4522: foreach my $key (sort(keys(%packagetab))) {
4523: #&logthis("extsion1 $extension $key !!");
4524: #no specific packages #how's our extension
4525: if ($key!~/^extension_\Q$extension\E&/) { next; }
4526: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4527: \%metathesekeys);
4528: }
4529: if (!exists($metacache{$uri}->{':packages'})) {
4530: foreach my $key (sort(keys(%packagetab))) {
4531: #no specific packages well let's get default then
4532: if ($key!~/^default&/) { next; }
4533: &metadata_create_package_def($uri,$key,'default',
4534: \%metathesekeys);
4535: }
4536: }
4537: # are there custom rights to evaluate
4538: if ($metacache{$uri}->{':copyright'} eq 'custom') {
4539:
4540: #
4541: # Importing a rights file here
4542: #
4543: unless ($depthcount) {
4544: my $location=$metacache{$uri}->{':customdistributionfile'};
4545: my $dir=$filename;
4546: $dir=~s|[^/]*$||;
4547: $location=&filelocation($dir,$location);
4548: foreach (sort(split(/\,/,&metadata($uri,'keys',
4549: $location,'_rights',
4550: $depthcount+1)))) {
4551: $metacache{$uri}->{':'.$_}=$metacache{$uri}->{':'.$_};
4552: $metathesekeys{$_}=1;
4553: }
4554: }
4555: }
4556: $metacache{$uri}->{':keys'}=join(',',keys %metathesekeys);
4557: &metadata_generate_part0(\%metathesekeys,$metacache{$uri},$uri);
4558: $metacache{$uri}->{':allpossiblekeys'}=join(',',keys %metathesekeys);
4559: &do_cache(\%metacache,$uri,$metacache{$uri},'meta');
4560: # this is the end of "was not already recently cached
4561: }
4562: return $metacache{$uri}->{':'.$what};
4563: }
4564:
4565: sub metadata_create_package_def {
4566: my ($uri,$key,$package,$metathesekeys)=@_;
4567: my ($pack,$name,$subp)=split(/\&/,$key);
4568: if ($subp eq 'default') { next; }
4569:
4570: if (defined($metacache{$uri}->{':packages'})) {
4571: $metacache{$uri}->{':packages'}.=','.$package;
4572: } else {
4573: $metacache{$uri}->{':packages'}=$package;
4574: }
4575: my $value=$packagetab{$key};
4576: my $unikey;
4577: $unikey='parameter_0_'.$name;
4578: $metacache{$uri}->{':'.$unikey.'.part'}=0;
4579: $$metathesekeys{$unikey}=1;
4580: unless (defined($metacache{$uri}->{':'.$unikey.'.'.$subp})) {
4581: $metacache{$uri}->{':'.$unikey.'.'.$subp}=$value;
4582: }
4583: if (defined($metacache{$uri}->{':'.$unikey.'.default'})) {
4584: $metacache{$uri}->{':'.$unikey}=
4585: $metacache{$uri}->{':'.$unikey.'.default'};
4586: }
4587: }
4588:
4589: sub metadata_generate_part0 {
4590: my ($metadata,$metacache,$uri) = @_;
4591: my %allnames;
4592: foreach my $metakey (sort keys %$metadata) {
4593: if ($metakey=~/^parameter\_(.*)/) {
4594: my $part=$$metacache{':'.$metakey.'.part'};
4595: my $name=$$metacache{':'.$metakey.'.name'};
4596: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
4597: $allnames{$name}=$part;
4598: }
4599: }
4600: }
4601: foreach my $name (keys(%allnames)) {
4602: $$metadata{"parameter_0_$name"}=1;
4603: my $key=":parameter_0_$name";
4604: $$metacache{"$key.part"}='0';
4605: $$metacache{"$key.name"}=$name;
4606: $$metacache{"$key.type"}=$$metacache{':parameter_'.
4607: $allnames{$name}.'_'.$name.
4608: '.type'};
4609: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
4610: '.display'};
4611: my $expr='\\[Part: '.$allnames{$name}.'\\]';
4612: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
4613: $$metacache{"$key.display"}=$olddis;
4614: }
4615: }
4616:
4617: # ------------------------------------------------- Get the title of a resource
4618:
4619: sub gettitle {
4620: my $urlsymb=shift;
4621: my $symb=&symbread($urlsymb);
4622: if ($symb) {
4623: my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
4624: if (defined($cached)) { return $result; }
4625: my ($map,$resid,$url)=&decode_symb($symb);
4626: my $title='';
4627: my %bighash;
4628: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4629: &GDBM_READER(),0640)) {
4630: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4631: $title=$bighash{'title_'.$mapid.'.'.$resid};
4632: untie %bighash;
4633: }
4634: $title=~s/\&colon\;/\:/gs;
4635: if ($title) {
4636: return &do_cache(\%titlecache,$symb,$title,'title');
4637: }
4638: $urlsymb=$url;
4639: }
4640: my $title=&metadata($urlsymb,'title');
4641: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
4642: return $title;
4643: }
4644:
4645: # ------------------------------------------------- Update symbolic store links
4646:
4647: sub symblist {
4648: my ($mapname,%newhash)=@_;
4649: $mapname=&deversion(&declutter($mapname));
4650: my %hash;
4651: if (($ENV{'request.course.fn'}) && (%newhash)) {
4652: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4653: &GDBM_WRCREAT(),0640)) {
4654: foreach (keys %newhash) {
4655: $hash{declutter($_)}=$mapname.'___'.&deversion($newhash{$_});
4656: }
4657: if (untie(%hash)) {
4658: return 'ok';
4659: }
4660: }
4661: }
4662: return 'error';
4663: }
4664:
4665: # --------------------------------------------------------------- Verify a symb
4666:
4667: sub symbverify {
4668: my ($symb,$thisurl)=@_;
4669: my $thisfn=$thisurl;
4670: # wrapper not part of symbs
4671: $thisfn=~s/^\/adm\/wrapper//;
4672: $thisfn=&declutter($thisfn);
4673: # direct jump to resource in page or to a sequence - will construct own symbs
4674: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4675: # check URL part
4676: my ($map,$resid,$url)=&decode_symb($symb);
4677:
4678: unless ($url eq $thisfn) { return 0; }
4679:
4680: $symb=&symbclean($symb);
4681: $thisurl=&deversion($thisurl);
4682: $thisfn=&deversion($thisfn);
4683:
4684: my %bighash;
4685: my $okay=0;
4686:
4687: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4688: &GDBM_READER(),0640)) {
4689: my $ids=$bighash{'ids_'.&clutter($thisurl)};
4690: unless ($ids) {
4691: $ids=$bighash{'ids_/'.$thisurl};
4692: }
4693: if ($ids) {
4694: # ------------------------------------------------------------------- Has ID(s)
4695: foreach (split(/\,/,$ids)) {
4696: my ($mapid,$resid)=split(/\./,$_);
4697: if (
4698: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4699: eq $symb) {
4700: $okay=1;
4701: }
4702: }
4703: }
4704: untie(%bighash);
4705: }
4706: return $okay;
4707: }
4708:
4709: # --------------------------------------------------------------- Clean-up symb
4710:
4711: sub symbclean {
4712: my $symb=shift;
4713:
4714: # remove version from map
4715: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4716:
4717: # remove version from URL
4718: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4719:
4720: # remove wrapper
4721:
4722: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
4723: return $symb;
4724: }
4725:
4726: # ---------------------------------------------- Split symb to find map and url
4727:
4728: sub encode_symb {
4729: my ($map,$resid,$url)=@_;
4730: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4731: }
4732:
4733: sub decode_symb {
4734: my ($map,$resid,$url)=split(/\_\_\_/,shift);
4735: return (&fixversion($map),$resid,&fixversion($url));
4736: }
4737:
4738: sub fixversion {
4739: my $fn=shift;
4740: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
4741: my %bighash;
4742: my $uri=&clutter($fn);
4743: my $key=$ENV{'request.course.id'}.'_'.$uri;
4744: # is this cached?
4745: my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
4746: 'courseresversion',600);
4747: if (defined($cached)) { return $result; }
4748: # unfortunately not cached, or expired
4749: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4750: &GDBM_READER(),0640)) {
4751: if ($bighash{'version_'.$uri}) {
4752: my $version=$bighash{'version_'.$uri};
4753: unless (($version eq 'mostrecent') ||
4754: ($version==&getversion($uri))) {
4755: $uri=~s/\.(\w+)$/\.$version\.$1/;
4756: }
4757: }
4758: untie %bighash;
4759: }
4760: return &do_cache
4761: (\%courseresversioncache,$key,&declutter($uri),'courseresversion');
4762: }
4763:
4764: sub deversion {
4765: my $url=shift;
4766: $url=~s/\.\d+\.(\w+)$/\.$1/;
4767: return $url;
4768: }
4769:
4770: # ------------------------------------------------------ Return symb list entry
4771:
4772: sub symbread {
4773: my ($thisfn,$donotrecurse)=@_;
4774: my $cache_str='request.symbread.cached.'.$thisfn;
4775: if (defined($ENV{$cache_str})) { return $ENV{$cache_str}; }
4776: # no filename provided? try from environment
4777: unless ($thisfn) {
4778: if ($ENV{'request.symb'}) {
4779: return $ENV{$cache_str}=&symbclean($ENV{'request.symb'});
4780: }
4781: $thisfn=$ENV{'request.filename'};
4782: }
4783: # is that filename actually a symb? Verify, clean, and return
4784: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4785: if (&symbverify($thisfn,$1)) {
4786: return $ENV{$cache_str}=&symbclean($thisfn);
4787: }
4788: }
4789: $thisfn=declutter($thisfn);
4790: my %hash;
4791: my %bighash;
4792: my $syval='';
4793: if (($ENV{'request.course.fn'}) && ($thisfn)) {
4794: my $targetfn = $thisfn;
4795: if ( ($thisfn =~ m/^uploaded\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4796: $targetfn = 'adm/wrapper/'.$thisfn;
4797: }
4798: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4799: &GDBM_READER(),0640)) {
4800: $syval=$hash{$targetfn};
4801: untie(%hash);
4802: }
4803: # ---------------------------------------------------------- There was an entry
4804: if ($syval) {
4805: unless ($syval=~/\_\d+$/) {
4806: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
4807: &appenv('request.ambiguous' => $thisfn);
4808: return $ENV{$cache_str}='';
4809: }
4810: $syval.=$1;
4811: }
4812: } else {
4813: # ------------------------------------------------------- Was not in symb table
4814: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4815: &GDBM_READER(),0640)) {
4816: # ---------------------------------------------- Get ID(s) for current resource
4817: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4818: unless ($ids) {
4819: $ids=$bighash{'ids_/'.$thisfn};
4820: }
4821: unless ($ids) {
4822: # alias?
4823: $ids=$bighash{'mapalias_'.$thisfn};
4824: }
4825: if ($ids) {
4826: # ------------------------------------------------------------------- Has ID(s)
4827: my @possibilities=split(/\,/,$ids);
4828: if ($#possibilities==0) {
4829: # ----------------------------------------------- There is only one possibility
4830: my ($mapid,$resid)=split(/\./,$ids);
4831: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
4832: } elsif (!$donotrecurse) {
4833: # ------------------------------------------ There is more than one possibility
4834: my $realpossible=0;
4835: foreach (@possibilities) {
4836: my $file=$bighash{'src_'.$_};
4837: if (&allowed('bre',$file)) {
4838: my ($mapid,$resid)=split(/\./,$_);
4839: if ($bighash{'map_type_'.$mapid} ne 'page') {
4840: $realpossible++;
4841: $syval=declutter($bighash{'map_id_'.$mapid}).
4842: '___'.$resid;
4843: }
4844: }
4845: }
4846: if ($realpossible!=1) { $syval=''; }
4847: } else {
4848: $syval='';
4849: }
4850: }
4851: untie(%bighash)
4852: }
4853: }
4854: if ($syval) {
4855: return $ENV{$cache_str}=&symbclean($syval.'___'.$thisfn);
4856: }
4857: }
4858: &appenv('request.ambiguous' => $thisfn);
4859: return $ENV{$cache_str}='';
4860: }
4861:
4862: # ---------------------------------------------------------- Return random seed
4863:
4864: sub numval {
4865: my $txt=shift;
4866: $txt=~tr/A-J/0-9/;
4867: $txt=~tr/a-j/0-9/;
4868: $txt=~tr/K-T/0-9/;
4869: $txt=~tr/k-t/0-9/;
4870: $txt=~tr/U-Z/0-5/;
4871: $txt=~tr/u-z/0-5/;
4872: $txt=~s/\D//g;
4873: if ($_64bit) { if ($txt > 2**32) { return -1; } }
4874: return int($txt);
4875: }
4876:
4877: sub numval2 {
4878: my $txt=shift;
4879: $txt=~tr/A-J/0-9/;
4880: $txt=~tr/a-j/0-9/;
4881: $txt=~tr/K-T/0-9/;
4882: $txt=~tr/k-t/0-9/;
4883: $txt=~tr/U-Z/0-5/;
4884: $txt=~tr/u-z/0-5/;
4885: $txt=~s/\D//g;
4886: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
4887: my $total;
4888: foreach my $val (@txts) { $total+=$val; }
4889: if ($_64bit) { if ($total > 2**32) { return -1; } }
4890: return int($total);
4891: }
4892:
4893: sub latest_rnd_algorithm_id {
4894: return '64bit3';
4895: }
4896:
4897: sub get_rand_alg {
4898: my ($courseid)=@_;
4899: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
4900: if ($courseid) {
4901: return $ENV{"course.$courseid.rndseed"};
4902: }
4903: return &latest_rnd_algorithm_id();
4904: }
4905:
4906: sub validCODE {
4907: my ($CODE)=@_;
4908: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
4909: return 0;
4910: }
4911:
4912: sub getCODE {
4913: if (&validCODE($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
4914: if (defined($Apache::lonhomework::parsing_a_problem) &&
4915: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
4916: return $Apache::lonhomework::history{'resource.CODE'};
4917: }
4918: return undef;
4919: }
4920:
4921: sub rndseed {
4922: my ($symb,$courseid,$domain,$username)=@_;
4923:
4924: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
4925: if (!$symb) {
4926: unless ($symb=$wsymb) { return time; }
4927: }
4928: if (!$courseid) { $courseid=$wcourseid; }
4929: if (!$domain) { $domain=$wdomain; }
4930: if (!$username) { $username=$wusername }
4931: my $which=&get_rand_alg();
4932: if (defined(&getCODE())) {
4933: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
4934: } elsif ($which eq '64bit3') {
4935: return &rndseed_64bit3($symb,$courseid,$domain,$username);
4936: } elsif ($which eq '64bit2') {
4937: return &rndseed_64bit2($symb,$courseid,$domain,$username);
4938: } elsif ($which eq '64bit') {
4939: return &rndseed_64bit($symb,$courseid,$domain,$username);
4940: }
4941: return &rndseed_32bit($symb,$courseid,$domain,$username);
4942: }
4943:
4944: sub rndseed_32bit {
4945: my ($symb,$courseid,$domain,$username)=@_;
4946: {
4947: use integer;
4948: my $symbchck=unpack("%32C*",$symb) << 27;
4949: my $symbseed=numval($symb) << 22;
4950: my $namechck=unpack("%32C*",$username) << 17;
4951: my $nameseed=numval($username) << 12;
4952: my $domainseed=unpack("%32C*",$domain) << 7;
4953: my $courseseed=unpack("%32C*",$courseid);
4954: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4955: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4956: #&Apache::lonxml::debug("rndseed :$num:$symb");
4957: if ($_64bit) { $num=(($num<<32)>>32); }
4958: return $num;
4959: }
4960: }
4961:
4962: sub rndseed_64bit {
4963: my ($symb,$courseid,$domain,$username)=@_;
4964: {
4965: use integer;
4966: my $symbchck=unpack("%32S*",$symb) << 21;
4967: my $symbseed=numval($symb) << 10;
4968: my $namechck=unpack("%32S*",$username);
4969:
4970: my $nameseed=numval($username) << 21;
4971: my $domainseed=unpack("%32S*",$domain) << 10;
4972: my $courseseed=unpack("%32S*",$courseid);
4973:
4974: my $num1=$symbchck+$symbseed+$namechck;
4975: my $num2=$nameseed+$domainseed+$courseseed;
4976: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4977: #&Apache::lonxml::debug("rndseed :$num:$symb");
4978: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
4979: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
4980: return "$num1,$num2";
4981: }
4982: }
4983:
4984: sub rndseed_64bit2 {
4985: my ($symb,$courseid,$domain,$username)=@_;
4986: {
4987: use integer;
4988: # strings need to be an even # of cahracters long, it it is odd the
4989: # last characters gets thrown away
4990: my $symbchck=unpack("%32S*",$symb.' ') << 21;
4991: my $symbseed=numval($symb) << 10;
4992: my $namechck=unpack("%32S*",$username.' ');
4993:
4994: my $nameseed=numval($username) << 21;
4995: my $domainseed=unpack("%32S*",$domain.' ') << 10;
4996: my $courseseed=unpack("%32S*",$courseid.' ');
4997:
4998: my $num1=$symbchck+$symbseed+$namechck;
4999: my $num2=$nameseed+$domainseed+$courseseed;
5000: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5001: #&Apache::lonxml::debug("rndseed :$num:$symb");
5002: return "$num1,$num2";
5003: }
5004: }
5005:
5006: sub rndseed_64bit3 {
5007: my ($symb,$courseid,$domain,$username)=@_;
5008: {
5009: use integer;
5010: # strings need to be an even # of cahracters long, it it is odd the
5011: # last characters gets thrown away
5012: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5013: my $symbseed=numval2($symb) << 10;
5014: my $namechck=unpack("%32S*",$username.' ');
5015:
5016: my $nameseed=numval2($username) << 21;
5017: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5018: my $courseseed=unpack("%32S*",$courseid.' ');
5019:
5020: my $num1=$symbchck+$symbseed+$namechck;
5021: my $num2=$nameseed+$domainseed+$courseseed;
5022: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5023: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5024: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5025:
5026: return "$num1:$num2";
5027: }
5028: }
5029:
5030: sub rndseed_CODE_64bit {
5031: my ($symb,$courseid,$domain,$username)=@_;
5032: {
5033: use integer;
5034: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5035: my $symbseed=numval2($symb);
5036: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5037: my $CODEseed=numval(&getCODE());
5038: my $courseseed=unpack("%32S*",$courseid.' ');
5039: my $num1=$symbseed+$CODEchck;
5040: my $num2=$CODEseed+$courseseed+$symbchck;
5041: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5042: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5043: if ($_64bit) { $num1=(($num1<<32)>>32); }
5044: if ($_64bit) { $num2=(($num2<<32)>>32); }
5045: return "$num1:$num2";
5046: }
5047: }
5048:
5049: sub setup_random_from_rndseed {
5050: my ($rndseed)=@_;
5051: if ($rndseed =~/([,:])/) {
5052: my ($num1,$num2)=split(/[,:]/,$rndseed);
5053: &Math::Random::random_set_seed(abs($num1),abs($num2));
5054: } else {
5055: &Math::Random::random_set_seed_from_phrase($rndseed);
5056: }
5057: }
5058:
5059: sub latest_receipt_algorithm_id {
5060: return 'receipt2';
5061: }
5062:
5063: sub recunique {
5064: my $fucourseid=shift;
5065: my $unique;
5066: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5067: $unique=$ENV{"course.$fucourseid.internal.encseed"};
5068: } else {
5069: $unique=$perlvar{'lonReceipt'};
5070: }
5071: return unpack("%32C*",$unique);
5072: }
5073:
5074: sub recprefix {
5075: my $fucourseid=shift;
5076: my $prefix;
5077: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5078: $prefix=$ENV{"course.$fucourseid.internal.encpref"};
5079: } else {
5080: $prefix=$perlvar{'lonHostID'};
5081: }
5082: return unpack("%32C*",$prefix);
5083: }
5084:
5085: sub ireceipt {
5086: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
5087: my $cuname=unpack("%32C*",$funame);
5088: my $cudom=unpack("%32C*",$fudom);
5089: my $cucourseid=unpack("%32C*",$fucourseid);
5090: my $cusymb=unpack("%32C*",$fusymb);
5091: my $cunique=&recunique($fucourseid);
5092: my $cpart=unpack("%32S*",$part);
5093: my $return =&recprefix($fucourseid).'-';
5094: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
5095: $ENV{'request.state'} eq 'construct') {
5096: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
5097: " and ".($cpart%$cudom));
5098:
5099: $return.= ($cunique%$cuname+
5100: $cunique%$cudom+
5101: $cusymb%$cuname+
5102: $cusymb%$cudom+
5103: $cucourseid%$cuname+
5104: $cucourseid%$cudom+
5105: $cpart%$cuname+
5106: $cpart%$cudom);
5107: } else {
5108: $return.= ($cunique%$cuname+
5109: $cunique%$cudom+
5110: $cusymb%$cuname+
5111: $cusymb%$cudom+
5112: $cucourseid%$cuname+
5113: $cucourseid%$cudom);
5114: }
5115: return $return;
5116: }
5117:
5118: sub receipt {
5119: my ($part)=@_;
5120: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5121: return &ireceipt($name,$domain,$courseid,$symb,$part);
5122: }
5123:
5124: # ------------------------------------------------------------ Serves up a file
5125: # returns either the contents of the file or
5126: # -1 if the file doesn't exist
5127: #
5128: # if the target is a file that was uploaded via DOCS,
5129: # a check will be made to see if a current copy exists on the local server,
5130: # if it does this will be served, otherwise a copy will be retrieved from
5131: # the home server for the course and stored in /home/httpd/html/userfiles on
5132: # the local server.
5133:
5134: sub getfile {
5135: my ($file) = @_;
5136:
5137: if ($file =~ m|^/*uploaded/|) { $file=&filelocation("",$file); }
5138: &repcopy($file);
5139: return &readfile($file);
5140: }
5141:
5142: sub repcopy_userfile {
5143: my ($file)=@_;
5144:
5145: if ($file =~ m|^/*uploaded/|) { $file=&filelocation("",$file); }
5146: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return OK; }
5147:
5148: my ($cdom,$cnum,$filename) =
5149: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5150: my ($info,$rtncode);
5151: my $uri="/uploaded/$cdom/$cnum/$filename";
5152: if (-e "$file") {
5153: my @fileinfo = stat($file);
5154: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5155: if ($lwpresp ne 'ok') {
5156: if ($rtncode eq '404') {
5157: unlink($file);
5158: }
5159: #my $ua=new LWP::UserAgent;
5160: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5161: #my $response=$ua->request($request);
5162: #if ($response->is_success()) {
5163: # return $response->content;
5164: # } else {
5165: # return -1;
5166: # }
5167: return -1;
5168: }
5169: if ($info < $fileinfo[9]) {
5170: return OK;
5171: }
5172: $info = '';
5173: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5174: if ($lwpresp ne 'ok') {
5175: return -1;
5176: }
5177: } else {
5178: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5179: if ($lwpresp ne 'ok') {
5180: my $ua=new LWP::UserAgent;
5181: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5182: my $response=$ua->request($request);
5183: if ($response->is_success()) {
5184: $info=$response->content;
5185: } else {
5186: return -1;
5187: }
5188: }
5189: my @parts = ($cdom,$cnum);
5190: if ($filename =~ m|^(.+)/[^/]+$|) {
5191: push @parts, split(/\//,$1);
5192: }
5193: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
5194: foreach my $part (@parts) {
5195: $path .= '/'.$part;
5196: if (!-e $path) {
5197: mkdir($path,0770);
5198: }
5199: }
5200: }
5201: open(FILE,">$file");
5202: print FILE $info;
5203: close(FILE);
5204: return OK;
5205: }
5206:
5207: sub tokenwrapper {
5208: my $uri=shift;
5209: $uri=~s|^http\://([^/]+)||;
5210: $uri=~s|^/||;
5211: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
5212: my $token=$1;
5213: my (undef,$udom,$uname,$file)=split('/',$uri,4);
5214: if ($udom && $uname && $file) {
5215: $file=~s|(\?\.*)*$||;
5216: &appenv("userfile.$udom/$uname/$file" => $ENV{'request.course.id'});
5217: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
5218: (($uri=~/\?/)?'&':'?').'token='.$token.
5219: '&tokenissued='.$perlvar{'lonHostID'};
5220: } else {
5221: return '/adm/notfound.html';
5222: }
5223: }
5224:
5225: sub getuploaded {
5226: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5227: $uri=~s/^\///;
5228: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
5229: my $ua=new LWP::UserAgent;
5230: my $request=new HTTP::Request($reqtype,$uri);
5231: my $response=$ua->request($request);
5232: $$rtncode = $response->code;
5233: if (! $response->is_success()) {
5234: return 'failed';
5235: }
5236: if ($reqtype eq 'HEAD') {
5237: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
5238: } elsif ($reqtype eq 'GET') {
5239: $$info = $response->content;
5240: }
5241: return 'ok';
5242: }
5243:
5244: sub readfile {
5245: my $file = shift;
5246: if ( (! -e $file ) || ($file eq '') ) { return -1; };
5247: my $fh;
5248: open($fh,"<$file");
5249: my $a='';
5250: while (<$fh>) { $a .=$_; }
5251: return $a;
5252: }
5253:
5254: sub filelocation {
5255: my ($dir,$file) = @_;
5256: my $location;
5257: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
5258: if ($file=~m:^/~:) { # is a contruction space reference
5259: $location = $file;
5260: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
5261: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
5262: my ($udom,$uname,$filename)=
5263: ($file=~m|^/+uploaded/+([^/]+)/+([^/]+)/+(.*)$|);
5264: my $home=&homeserver($uname,$udom);
5265: my $is_me=0;
5266: my @ids=¤t_machine_ids();
5267: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
5268: if ($is_me) {
5269: $location=&Apache::loncommon::propath($udom,$uname).
5270: '/userfiles/'.$filename;
5271: } else {
5272: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
5273: $udom.'/'.$uname.'/'.$filename;
5274: }
5275: } else {
5276: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5277: $file=~s:^/res/:/:;
5278: if ( !( $file =~ m:^/:) ) {
5279: $location = $dir. '/'.$file;
5280: } else {
5281: $location = '/home/httpd/html/res'.$file;
5282: }
5283: }
5284: $location=~s://+:/:g; # remove duplicate /
5285: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
5286: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
5287: return $location;
5288: }
5289:
5290: sub hreflocation {
5291: my ($dir,$file)=@_;
5292: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
5293: my $finalpath=filelocation($dir,$file);
5294: $finalpath=~s-^/home/httpd/html--;
5295: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
5296: return $finalpath;
5297: } elsif ($file=~m-^/home-) {
5298: $file=~s-^/home/httpd/html--;
5299: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
5300: return $file;
5301: }
5302: return $file;
5303: }
5304:
5305: sub current_machine_domains {
5306: my $hostname=$hostname{$perlvar{'lonHostID'}};
5307: my @domains;
5308: while( my($id, $name) = each(%hostname)) {
5309: # &logthis("-$id-$name-$hostname-");
5310: if ($hostname eq $name) {
5311: push(@domains,$hostdom{$id});
5312: }
5313: }
5314: return @domains;
5315: }
5316:
5317: sub current_machine_ids {
5318: my $hostname=$hostname{$perlvar{'lonHostID'}};
5319: my @ids;
5320: while( my($id, $name) = each(%hostname)) {
5321: # &logthis("-$id-$name-$hostname-");
5322: if ($hostname eq $name) {
5323: push(@ids,$id);
5324: }
5325: }
5326: return @ids;
5327: }
5328:
5329: # ------------------------------------------------------------- Declutters URLs
5330:
5331: sub declutter {
5332: my $thisfn=shift;
5333: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5334: $thisfn=~s/^\///;
5335: $thisfn=~s/^res\///;
5336: $thisfn=~s/\?.+$//;
5337: return $thisfn;
5338: }
5339:
5340: # ------------------------------------------------------------- Clutter up URLs
5341:
5342: sub clutter {
5343: my $thisfn='/'.&declutter(shift);
5344: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv|public)\//) {
5345: $thisfn='/res'.$thisfn;
5346: }
5347: return $thisfn;
5348: }
5349:
5350: sub freeze_escape {
5351: my ($value)=@_;
5352: if (ref($value)) {
5353: $value=&nfreeze($value);
5354: return '__FROZEN__'.&escape($value);
5355: }
5356: return &escape($value);
5357: }
5358:
5359: # -------------------------------------------------------- Escape Special Chars
5360:
5361: sub escape {
5362: my $str=shift;
5363: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
5364: return $str;
5365: }
5366:
5367: # ----------------------------------------------------- Un-Escape Special Chars
5368:
5369: sub unescape {
5370: my $str=shift;
5371: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
5372: return $str;
5373: }
5374:
5375: sub thaw_unescape {
5376: my ($value)=@_;
5377: if ($value =~ /^__FROZEN__/) {
5378: substr($value,0,10,undef);
5379: $value=&unescape($value);
5380: return &thaw($value);
5381: }
5382: return &unescape($value);
5383: }
5384:
5385: sub mod_perl_version {
5386: if (defined($perlvar{'MODPERL2'})) {
5387: return 2;
5388: }
5389: return 1;
5390: }
5391:
5392: sub correct_line_ends {
5393: my ($result)=@_;
5394: $$result =~s/\r\n/\n/mg;
5395: $$result =~s/\r/\n/mg;
5396: }
5397: # ================================================================ Main Program
5398:
5399: sub goodbye {
5400: &logthis("Starting Shut down");
5401: #not converted to using infrastruture and probably shouldn't be
5402: &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
5403: #converted
5404: &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
5405: &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
5406: &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
5407: &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
5408: #1.1 only
5409: &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
5410: &logthis(sprintf("%-20s is %s",'%getsectioncache',scalar(%getsectioncache)));
5411: &logthis(sprintf("%-20s is %s",'%courseresversioncache',scalar(%courseresversioncache)));
5412: &logthis(sprintf("%-20s is %s",'%resversioncache',scalar(%resversioncache)));
5413: &flushcourselogs();
5414: &logthis("Shutting down");
5415: return DONE;
5416: }
5417:
5418: BEGIN {
5419: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
5420: unless ($readit) {
5421: {
5422: open(my $config,"</etc/httpd/conf/loncapa.conf");
5423:
5424: while (my $configline=<$config>) {
5425: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
5426: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5427: chomp($varvalue);
5428: $perlvar{$varname}=$varvalue;
5429: }
5430: }
5431: close($config);
5432: }
5433: {
5434: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
5435:
5436: while (my $configline=<$config>) {
5437: if ($configline =~ /^[^\#]*PerlSetVar/) {
5438: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5439: chomp($varvalue);
5440: $perlvar{$varname}=$varvalue;
5441: }
5442: }
5443: close($config);
5444: }
5445:
5446: # ------------------------------------------------------------ Read domain file
5447: {
5448: %domaindescription = ();
5449: %domain_auth_def = ();
5450: %domain_auth_arg_def = ();
5451: my $fh;
5452: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
5453: while (<$fh>) {
5454: next if (/^(\#|\s*$)/);
5455: # next if /^\#/;
5456: chomp;
5457: my ($domain, $domain_description, $def_auth, $def_auth_arg,
5458: $def_lang, $city, $longi, $lati) = split(/:/,$_);
5459: $domain_auth_def{$domain}=$def_auth;
5460: $domain_auth_arg_def{$domain}=$def_auth_arg;
5461: $domaindescription{$domain}=$domain_description;
5462: $domain_lang_def{$domain}=$def_lang;
5463: $domain_city{$domain}=$city;
5464: $domain_longi{$domain}=$longi;
5465: $domain_lati{$domain}=$lati;
5466:
5467: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
5468: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
5469: }
5470: }
5471: close ($fh);
5472: }
5473:
5474:
5475: # ------------------------------------------------------------- Read hosts file
5476: {
5477: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
5478:
5479: while (my $configline=<$config>) {
5480: next if ($configline =~ /^(\#|\s*$)/);
5481: chomp($configline);
5482: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
5483: if ($id && $domain && $role && $name && $ip) {
5484: $hostname{$id}=$name;
5485: $hostdom{$id}=$domain;
5486: $hostip{$id}=$ip;
5487: $iphost{$ip}=$id;
5488: if ($role eq 'library') { $libserv{$id}=$name; }
5489: }
5490: }
5491: close($config);
5492: }
5493:
5494: # ------------------------------------------------------ Read spare server file
5495: {
5496: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
5497:
5498: while (my $configline=<$config>) {
5499: chomp($configline);
5500: if ($configline) {
5501: $spareid{$configline}=1;
5502: }
5503: }
5504: close($config);
5505: }
5506: # ------------------------------------------------------------ Read permissions
5507: {
5508: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
5509:
5510: while (my $configline=<$config>) {
5511: chomp($configline);
5512: if ($configline) {
5513: my ($role,$perm)=split(/ /,$configline);
5514: if ($perm ne '') { $pr{$role}=$perm; }
5515: }
5516: }
5517: close($config);
5518: }
5519:
5520: # -------------------------------------------- Read plain texts for permissions
5521: {
5522: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
5523:
5524: while (my $configline=<$config>) {
5525: chomp($configline);
5526: if ($configline) {
5527: my ($short,$plain)=split(/:/,$configline);
5528: if ($plain ne '') { $prp{$short}=$plain; }
5529: }
5530: }
5531: close($config);
5532: }
5533:
5534: # ---------------------------------------------------------- Read package table
5535: {
5536: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
5537:
5538: while (my $configline=<$config>) {
5539: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
5540: chomp($configline);
5541: my ($short,$plain)=split(/:/,$configline);
5542: my ($pack,$name)=split(/\&/,$short);
5543: if ($plain ne '') {
5544: $packagetab{$pack.'&'.$name.'&name'}=$name;
5545: $packagetab{$short}=$plain;
5546: }
5547: }
5548: close($config);
5549: }
5550:
5551: # ------------- set up temporary directory
5552: {
5553: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
5554:
5555: }
5556:
5557: %metacache=();
5558:
5559: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
5560: $dumpcount=0;
5561:
5562: &logtouch();
5563: &logthis('<font color=yellow>INFO: Read configuration</font>');
5564: $readit=1;
5565: {
5566: use integer;
5567: my $test=(2**32)+1;
5568: if ($test != 0) { $_64bit=1; }
5569: &logthis(" Detected 64bit platform ($_64bit)");
5570: }
5571: }
5572: }
5573:
5574: 1;
5575: __END__
5576:
5577: =pod
5578:
5579: =head1 NAME
5580:
5581: Apache::lonnet - Subroutines to ask questions about things in the network.
5582:
5583: =head1 SYNOPSIS
5584:
5585: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
5586:
5587: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
5588:
5589: Common parameters:
5590:
5591: =over 4
5592:
5593: =item *
5594:
5595: $uname : an internal username (if $cname expecting a course Id specifically)
5596:
5597: =item *
5598:
5599: $udom : a domain (if $cdom expecting a course's domain specifically)
5600:
5601: =item *
5602:
5603: $symb : a resource instance identifier
5604:
5605: =item *
5606:
5607: $namespace : the name of a .db file that contains the data needed or
5608: being set.
5609:
5610: =back
5611:
5612: =head1 OVERVIEW
5613:
5614: lonnet provides subroutines which interact with the
5615: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
5616: about classes, users, and resources.
5617:
5618: For many of these objects you can also use this to store data about
5619: them or modify them in various ways.
5620:
5621: =head2 Symbs
5622:
5623: To identify a specific instance of a resource, LON-CAPA uses symbols
5624: or "symbs"X<symb>. These identifiers are built from the URL of the
5625: map, the resource number of the resource in the map, and the URL of
5626: the resource itself. The latter is somewhat redundant, but might help
5627: if maps change.
5628:
5629: An example is
5630:
5631: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
5632:
5633: The respective map entry is
5634:
5635: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5636: title="Problem 2">
5637: </resource>
5638:
5639: Symbs are used by the random number generator, as well as to store and
5640: restore data specific to a certain instance of for example a problem.
5641:
5642: =head2 Storing And Retrieving Data
5643:
5644: X<store()>X<cstore()>X<restore()>Three of the most important functions
5645: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5646: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5647: is is the non-critical message twin of cstore. These functions are for
5648: handlers to store a perl hash to a user's permanent data space in an
5649: easy manner, and to retrieve it again on another call. It is expected
5650: that a handler would use this once at the beginning to retrieve data,
5651: and then again once at the end to send only the new data back.
5652:
5653: The data is stored in the user's data directory on the user's
5654: homeserver under the ID of the course.
5655:
5656: The hash that is returned by restore will have all of the previous
5657: value for all of the elements of the hash.
5658:
5659: Example:
5660:
5661: #creating a hash
5662: my %hash;
5663: $hash{'foo'}='bar';
5664:
5665: #storing it
5666: &Apache::lonnet::cstore(\%hash);
5667:
5668: #changing a value
5669: $hash{'foo'}='notbar';
5670:
5671: #adding a new value
5672: $hash{'bar'}='foo';
5673: &Apache::lonnet::cstore(\%hash);
5674:
5675: #retrieving the hash
5676: my %history=&Apache::lonnet::restore();
5677:
5678: #print the hash
5679: foreach my $key (sort(keys(%history))) {
5680: print("\%history{$key} = $history{$key}");
5681: }
5682:
5683: Will print out:
5684:
5685: %history{1:foo} = bar
5686: %history{1:keys} = foo:timestamp
5687: %history{1:timestamp} = 990455579
5688: %history{2:bar} = foo
5689: %history{2:foo} = notbar
5690: %history{2:keys} = foo:bar:timestamp
5691: %history{2:timestamp} = 990455580
5692: %history{bar} = foo
5693: %history{foo} = notbar
5694: %history{timestamp} = 990455580
5695: %history{version} = 2
5696:
5697: Note that the special hash entries C<keys>, C<version> and
5698: C<timestamp> were added to the hash. C<version> will be equal to the
5699: total number of versions of the data that have been stored. The
5700: C<timestamp> attribute will be the UNIX time the hash was
5701: stored. C<keys> is available in every historical section to list which
5702: keys were added or changed at a specific historical revision of a
5703: hash.
5704:
5705: B<Warning>: do not store the hash that restore returns directly. This
5706: will cause a mess since it will restore the historical keys as if the
5707: were new keys. I.E. 1:foo will become 1:1:foo etc.
5708:
5709: Calling convention:
5710:
5711: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5712: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
5713:
5714: For more detailed information, see lonnet specific documentation.
5715:
5716: =head1 RETURN MESSAGES
5717:
5718: =over 4
5719:
5720: =item * B<con_lost>: unable to contact remote host
5721:
5722: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5723: when the connection is brought back up
5724:
5725: =item * B<con_failed>: unable to contact remote host and unable to save message
5726: for later delivery
5727:
5728: =item * B<error:>: an error a occured, a description of the error follows the :
5729:
5730: =item * B<no_such_host>: unable to fund a host associated with the user/domain
5731: that was requested
5732:
5733: =back
5734:
5735: =head1 PUBLIC SUBROUTINES
5736:
5737: =head2 Session Environment Functions
5738:
5739: =over 4
5740:
5741: =item *
5742: X<appenv()>
5743: B<appenv(%hash)>: the value of %hash is written to
5744: the user envirnoment file, and will be restored for each access this
5745: user makes during this session, also modifies the %ENV for the current
5746: process
5747:
5748: =item *
5749: X<delenv()>
5750: B<delenv($regexp)>: removes all items from the session
5751: environment file that matches the regular expression in $regexp. The
5752: values are also delted from the current processes %ENV.
5753:
5754: =back
5755:
5756: =head2 User Information
5757:
5758: =over 4
5759:
5760: =item *
5761: X<queryauthenticate()>
5762: B<queryauthenticate($uname,$udom)>: try to determine user's current
5763: authentication scheme
5764:
5765: =item *
5766: X<authenticate()>
5767: B<authenticate($uname,$upass,$udom)>: try to
5768: authenticate user from domain's lib servers (first use the current
5769: one). C<$upass> should be the users password.
5770:
5771: =item *
5772: X<homeserver()>
5773: B<homeserver($uname,$udom)>: find the server which has
5774: the user's directory and files (there must be only one), this caches
5775: the answer, and also caches if there is a borken connection.
5776:
5777: =item *
5778: X<idget()>
5779: B<idget($udom,@ids)>: find the usernames behind a list of IDs
5780: (IDs are a unique resource in a domain, there must be only 1 ID per
5781: username, and only 1 username per ID in a specific domain) (returns
5782: hash: id=>name,id=>name)
5783:
5784: =item *
5785: X<idrget()>
5786: B<idrget($udom,@unames)>: find the IDs behind a list of
5787: usernames (returns hash: name=>id,name=>id)
5788:
5789: =item *
5790: X<idput()>
5791: B<idput($udom,%ids)>: store away a list of names and associated IDs
5792:
5793: =item *
5794: X<rolesinit()>
5795: B<rolesinit($udom,$username,$authhost)>: get user privileges
5796:
5797: =item *
5798: X<getsection()>
5799: B<getsection($udom,$uname,$cname)>: finds the section of student in the
5800: course $cname, return section name/number or '' for "not in course"
5801: and '-1' for "no section"
5802:
5803: =item *
5804: X<userenvironment()>
5805: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
5806: passed in @what from the requested user's environment, returns a hash
5807:
5808: =back
5809:
5810: =head2 User Roles
5811:
5812: =over 4
5813:
5814: =item *
5815:
5816: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
5817: actions
5818: F: full access
5819: U,I,K: authentication modes (cxx only)
5820: '': forbidden
5821: 1: user needs to choose course
5822: 2: browse allowed
5823:
5824: =item *
5825:
5826: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
5827: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
5828: and course level
5829:
5830: =item *
5831:
5832: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
5833: explanation of a user role term
5834:
5835: =back
5836:
5837: =head2 User Modification
5838:
5839: =over 4
5840:
5841: =item *
5842:
5843: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
5844: user for the level given by URL. Optional start and end dates (leave empty
5845: string or zero for "no date")
5846:
5847: =item *
5848:
5849: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
5850: change a users, password, possible return values are: ok,
5851: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
5852: refused
5853:
5854: =item *
5855:
5856: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
5857:
5858: =item *
5859:
5860: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
5861: modify user
5862:
5863: =item *
5864:
5865: modifystudent
5866:
5867: modify a students enrollment and identification information.
5868: The course id is resolved based on the current users environment.
5869: This means the envoking user must be a course coordinator or otherwise
5870: associated with a course.
5871:
5872: This call is essentially a wrapper for lonnet::modifyuser and
5873: lonnet::modify_student_enrollment
5874:
5875: Inputs:
5876:
5877: =over 4
5878:
5879: =item B<$udom> Students loncapa domain
5880:
5881: =item B<$uname> Students loncapa login name
5882:
5883: =item B<$uid> Students id/student number
5884:
5885: =item B<$umode> Students authentication mode
5886:
5887: =item B<$upass> Students password
5888:
5889: =item B<$first> Students first name
5890:
5891: =item B<$middle> Students middle name
5892:
5893: =item B<$last> Students last name
5894:
5895: =item B<$gene> Students generation
5896:
5897: =item B<$usec> Students section in course
5898:
5899: =item B<$end> Unix time of the roles expiration
5900:
5901: =item B<$start> Unix time of the roles start date
5902:
5903: =item B<$forceid> If defined, allow $uid to be changed
5904:
5905: =item B<$desiredhome> server to use as home server for student
5906:
5907: =back
5908:
5909: =item *
5910:
5911: modify_student_enrollment
5912:
5913: Change a students enrollment status in a class. The environment variable
5914: 'role.request.course' must be defined for this function to proceed.
5915:
5916: Inputs:
5917:
5918: =over 4
5919:
5920: =item $udom, students domain
5921:
5922: =item $uname, students name
5923:
5924: =item $uid, students user id
5925:
5926: =item $first, students first name
5927:
5928: =item $middle
5929:
5930: =item $last
5931:
5932: =item $gene
5933:
5934: =item $usec
5935:
5936: =item $end
5937:
5938: =item $start
5939:
5940: =back
5941:
5942:
5943: =item *
5944:
5945: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
5946: custom role; give a custom role to a user for the level given by URL. Specify
5947: name and domain of role author, and role name
5948:
5949: =item *
5950:
5951: revokerole($udom,$uname,$url,$role) : revoke a role for url
5952:
5953: =item *
5954:
5955: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
5956:
5957: =back
5958:
5959: =head2 Course Infomation
5960:
5961: =over 4
5962:
5963: =item *
5964:
5965: coursedescription($courseid) : course description
5966:
5967: =item *
5968:
5969: courseresdata($coursenum,$coursedomain,@which) : request for current
5970: parameter setting for a specific course, @what should be a list of
5971: parameters to ask about. This routine caches answers for 5 minutes.
5972:
5973: =back
5974:
5975: =head2 Course Modification
5976:
5977: =over 4
5978:
5979: =item *
5980:
5981: writecoursepref($courseid,%prefs) : write preferences (environment
5982: database) for a course
5983:
5984: =item *
5985:
5986: createcourse($udom,$description,$url) : make/modify course
5987:
5988: =back
5989:
5990: =head2 Resource Subroutines
5991:
5992: =over 4
5993:
5994: =item *
5995:
5996: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
5997:
5998: =item *
5999:
6000: repcopy($filename) : subscribes to the requested file, and attempts to
6001: replicate from the owning library server, Might return
6002: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
6003: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
6004: resource. Expects the local filesystem pathname
6005: (/home/httpd/html/res/....)
6006:
6007: =back
6008:
6009: =head2 Resource Information
6010:
6011: =over 4
6012:
6013: =item *
6014:
6015: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
6016: a vairety of different possible values, $varname should be a request
6017: string, and the other parameters can be used to specify who and what
6018: one is asking about.
6019:
6020: Possible values for $varname are environment.lastname (or other item
6021: from the envirnment hash), user.name (or someother aspect about the
6022: user), resource.0.maxtries (or some other part and parameter of a
6023: resource)
6024:
6025: =item *
6026:
6027: directcondval($number) : get current value of a condition; reads from a state
6028: string
6029:
6030: =item *
6031:
6032: condval($condidx) : value of condition index based on state
6033:
6034: =item *
6035:
6036: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
6037: resource's metadata, $what should be either a specific key, or either
6038: 'keys' (to get a list of possible keys) or 'packages' to get a list of
6039: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
6040:
6041: this function automatically caches all requests
6042:
6043: =item *
6044:
6045: metadata_query($query,$custom,$customshow) : make a metadata query against the
6046: network of library servers; returns file handle of where SQL and regex results
6047: will be stored for query
6048:
6049: =item *
6050:
6051: symbread($filename) : return symbolic list entry (filename argument optional);
6052: returns the data handle
6053:
6054: =item *
6055:
6056: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
6057: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
6058: failure, user must be in a course, as it assumes the existance of the
6059: course initi hash, and uses $ENV('request.course.id'}
6060:
6061:
6062: =item *
6063:
6064: symbclean($symb) : removes versions numbers from a symb, returns the
6065: cleaned symb
6066:
6067: =item *
6068:
6069: is_on_map($uri) : checks if the $uri is somewhere on the current
6070: course map, user must be in a course for it to work.
6071:
6072: =item *
6073:
6074: numval($salt) : return random seed value (addend for rndseed)
6075:
6076: =item *
6077:
6078: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
6079: a random seed, all arguments are optional, if they aren't sent it uses the
6080: environment to derive them. Note: if symb isn't sent and it can't get one
6081: from &symbread it will use the current time as its return value
6082:
6083: =item *
6084:
6085: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
6086: unfakeable, receipt
6087:
6088: =item *
6089:
6090: receipt() : API to ireceipt working off of ENV values; given out to users
6091:
6092: =item *
6093:
6094: countacc($url) : count the number of accesses to a given URL
6095:
6096: =item *
6097:
6098: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
6099:
6100: =item *
6101:
6102: checkin($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 $tcrsid)
6103:
6104: =item *
6105:
6106: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
6107:
6108: =item *
6109:
6110: devalidate($symb) : devalidate temporary spreadsheet calculations,
6111: forcing spreadsheet to reevaluate the resource scores next time.
6112:
6113: =back
6114:
6115: =head2 Storing/Retreiving Data
6116:
6117: =over 4
6118:
6119: =item *
6120:
6121: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
6122: for this url; hashref needs to be given and should be a \%hashname; the
6123: remaining args aren't required and if they aren't passed or are '' they will
6124: be derived from the ENV
6125:
6126: =item *
6127:
6128: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
6129: uses critical subroutine
6130:
6131: =item *
6132:
6133: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
6134: all args are optional
6135:
6136: =item *
6137:
6138: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
6139: works very similar to store/cstore, but all data is stored in a
6140: temporary location and can be reset using tmpreset, $storehash should
6141: be a hash reference, returns nothing on success
6142:
6143: =item *
6144:
6145: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
6146: similar to restore, but all data is stored in a temporary location and
6147: can be reset using tmpreset. Returns a hash of values on success,
6148: error string otherwise.
6149:
6150: =item *
6151:
6152: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
6153: deltes all keys for $symb form the temporary storage hash.
6154:
6155: =item *
6156:
6157: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6158: reference filled in from namesp ($udom and $uname are optional)
6159:
6160: =item *
6161:
6162: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
6163: namesp ($udom and $uname are optional)
6164:
6165: =item *
6166:
6167: dump($namespace,$udom,$uname,$regexp) :
6168: dumps the complete (or key matching regexp) namespace into a hash
6169: ($udom, $uname and $regexp are optional)
6170:
6171: =item *
6172:
6173: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
6174: $store can be a scalar, an array reference, or if the amount to be
6175: incremented is > 1, a hash reference.
6176:
6177: ($udom and $uname are optional)
6178:
6179: =item *
6180:
6181: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
6182: ($udom and $uname are optional)
6183:
6184: =item *
6185:
6186: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
6187: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
6188: used in records written by &store and retrieved by &restore. This function
6189: was created for use in editing discussion posts, without incrementing the
6190: version number included in the key for a particular post. The colon
6191: separated list of attribute names (e.g., the value associated with the key
6192: 1:keys:$symb) is also generated and passed in the ampersand separated
6193: items sent to lonnet::reply().
6194:
6195: =item *
6196:
6197: cput($namespace,$storehash,$udom,$uname) : critical put
6198: ($udom and $uname are optional)
6199:
6200: =item *
6201:
6202: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6203: reference filled in from namesp (encrypts the return communication)
6204: ($udom and $uname are optional)
6205:
6206: =item *
6207:
6208: log($udom,$name,$home,$message) : write to permanent log for user; use
6209: critical subroutine
6210:
6211: =back
6212:
6213: =head2 Network Status Functions
6214:
6215: =over 4
6216:
6217: =item *
6218:
6219: dirlist($uri) : return directory list based on URI
6220:
6221: =item *
6222:
6223: spareserver() : find server with least workload from spare.tab
6224:
6225: =back
6226:
6227: =head2 Apache Request
6228:
6229: =over 4
6230:
6231: =item *
6232:
6233: ssi($url,%hash) : server side include, does a complete request cycle on url to
6234: localhost, posts hash
6235:
6236: =back
6237:
6238: =head2 Data to String to Data
6239:
6240: =over 4
6241:
6242: =item *
6243:
6244: hash2str(%hash) : convert a hash into a string complete with escaping and '='
6245: and '&' separators, supports elements that are arrayrefs and hashrefs
6246:
6247: =item *
6248:
6249: hashref2str($hashref) : convert a hashref into a string complete with
6250: escaping and '=' and '&' separators, supports elements that are
6251: arrayrefs and hashrefs
6252:
6253: =item *
6254:
6255: arrayref2str($arrayref) : convert an arrayref into a string complete
6256: with escaping and '&' separators, supports elements that are arrayrefs
6257: and hashrefs
6258:
6259: =item *
6260:
6261: str2hash($string) : convert string to hash using unescaping and
6262: splitting on '=' and '&', supports elements that are arrayrefs and
6263: hashrefs
6264:
6265: =item *
6266:
6267: str2array($string) : convert string to hash using unescaping and
6268: splitting on '&', supports elements that are arrayrefs and hashrefs
6269:
6270: =back
6271:
6272: =head2 Logging Routines
6273:
6274: =over 4
6275:
6276: These routines allow one to make log messages in the lonnet.log and
6277: lonnet.perm logfiles.
6278:
6279: =item *
6280:
6281: logtouch() : make sure the logfile, lonnet.log, exists
6282:
6283: =item *
6284:
6285: logthis() : append message to the normal lonnet.log file, it gets
6286: preiodically rolled over and deleted.
6287:
6288: =item *
6289:
6290: logperm() : append a permanent message to lonnet.perm.log, this log
6291: file never gets deleted by any automated portion of the system, only
6292: messages of critical importance should go in here.
6293:
6294: =back
6295:
6296: =head2 General File Helper Routines
6297:
6298: =over 4
6299:
6300: =item *
6301:
6302: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
6303: (a) files in /uploaded
6304: (i) If a local copy of the file exists -
6305: compares modification date of local copy with last-modified date for
6306: definitive version stored on home server for course. If local copy is
6307: stale, requests a new version from the home server and stores it.
6308: If the original has been removed from the home server, then local copy
6309: is unlinked.
6310: (ii) If local copy does not exist -
6311: requests the file from the home server and stores it.
6312:
6313: If $caller is 'uploadrep':
6314: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
6315: for request for files originally uploaded via DOCS.
6316: - returns 'ok' if fresh local copy now available, -1 otherwise.
6317:
6318: Otherwise:
6319: This indicates a call from the content generation phase of the request.
6320: - returns the entire contents of the file or -1.
6321:
6322: (b) files in /res
6323: - returns the entire contents of a file or -1;
6324: it properly subscribes to and replicates the file if neccessary.
6325:
6326: =item *
6327:
6328: filelocation($dir,$file) : returns file system location of a file
6329: based on URI; meant to be "fairly clean" absolute reference, $dir is a
6330: directory that relative $file lookups are to looked in ($dir of /a/dir
6331: and a file of ../bob will become /a/bob)
6332:
6333: =item *
6334:
6335: hreflocation($dir,$file) : returns file system location or a URL; same as
6336: filelocation except for hrefs
6337:
6338: =item *
6339:
6340: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
6341:
6342: =back
6343:
6344: =head2 HTTP Helper Routines
6345:
6346: =over 4
6347:
6348: =item *
6349:
6350: escape() : unpack non-word characters into CGI-compatible hex codes
6351:
6352: =item *
6353:
6354: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
6355:
6356: =back
6357:
6358: =head1 PRIVATE SUBROUTINES
6359:
6360: =head2 Underlying communication routines (Shouldn't call)
6361:
6362: =over 4
6363:
6364: =item *
6365:
6366: subreply() : tries to pass a message to lonc, returns con_lost if incapable
6367:
6368: =item *
6369:
6370: reply() : uses subreply to send a message to remote machine, logs all failures
6371:
6372: =item *
6373:
6374: critical() : passes a critical message to another server; if cannot
6375: get through then place message in connection buffer directory and
6376: returns con_delayed, if incapable of saving message, returns
6377: con_failed
6378:
6379: =item *
6380:
6381: reconlonc() : tries to reconnect lonc client processes.
6382:
6383: =back
6384:
6385: =head2 Resource Access Logging
6386:
6387: =over 4
6388:
6389: =item *
6390:
6391: flushcourselogs() : flush (save) buffer logs and access logs
6392:
6393: =item *
6394:
6395: courselog($what) : save message for course in hash
6396:
6397: =item *
6398:
6399: courseacclog($what) : save message for course using &courselog(). Perform
6400: special processing for specific resource types (problems, exams, quizzes, etc).
6401:
6402: =item *
6403:
6404: goodbye() : flush course logs and log shutting down; it is called in srm.conf
6405: as a PerlChildExitHandler
6406:
6407: =back
6408:
6409: =head2 Other
6410:
6411: =over 4
6412:
6413: =item *
6414:
6415: symblist($mapname,%newhash) : update symbolic storage links
6416:
6417: =back
6418:
6419: =cut
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>