1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.664 2005/10/14 19:08:42 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
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 %badServerCache %iphost %spareid %hostdom
39: %libserv %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf
42: %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir $_64bit
44: %env);
45:
46: use IO::Socket;
47: use GDBM_File;
48: use Apache::Constants qw(:common :http);
49: use HTML::LCParser;
50: use HTML::Parser;
51: use Fcntl qw(:flock);
52: use Apache::lonlocal;
53: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
54: use Time::HiRes qw( gettimeofday tv_interval );
55: use Cache::Memcached;
56: my $readit;
57: my $max_connection_retries = 10; # Or some such value.
58:
59: require Exporter;
60:
61: our @ISA = qw (Exporter);
62: our @EXPORT = qw(%env);
63:
64: =pod
65:
66: =head1 Package Variables
67:
68: These are largely undocumented, so if you decipher one please note it here.
69:
70: =over 4
71:
72: =item $processmarker
73:
74: Contains the time this process was started and this servers host id.
75:
76: =item $dumpcount
77:
78: Counts the number of times a message log flush has been attempted (regardless
79: of success) by this process. Used as part of the filename when messages are
80: delayed.
81:
82: =back
83:
84: =cut
85:
86:
87: # --------------------------------------------------------------------- Logging
88:
89: sub logtouch {
90: my $execdir=$perlvar{'lonDaemons'};
91: unless (-e "$execdir/logs/lonnet.log") {
92: open(my $fh,">>$execdir/logs/lonnet.log");
93: close $fh;
94: }
95: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
96: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
97: }
98:
99: sub logthis {
100: my $message=shift;
101: my $execdir=$perlvar{'lonDaemons'};
102: my $now=time;
103: my $local=localtime($now);
104: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
105: print $fh "$local ($$): $message\n";
106: close($fh);
107: }
108: return 1;
109: }
110:
111: sub logperm {
112: my $message=shift;
113: my $execdir=$perlvar{'lonDaemons'};
114: my $now=time;
115: my $local=localtime($now);
116: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
117: print $fh "$now:$message:$local\n";
118: close($fh);
119: }
120: return 1;
121: }
122:
123: # -------------------------------------------------- Non-critical communication
124: sub subreply {
125: my ($cmd,$server)=@_;
126: my $peerfile="$perlvar{'lonSockDir'}/$server";
127: #
128: # With loncnew process trimming, there's a timing hole between lonc server
129: # process exit and the master server picking up the listen on the AF_UNIX
130: # socket. In that time interval, a lock file will exist:
131:
132: my $lockfile=$peerfile.".lock";
133: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
134: sleep(1);
135: }
136: # At this point, either a loncnew parent is listening or an old lonc
137: # or loncnew child is listening so we can connect or everything's dead.
138: #
139: # We'll give the connection a few tries before abandoning it. If
140: # connection is not possible, we'll con_lost back to the client.
141: #
142: my $client;
143: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
144: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
145: Type => SOCK_STREAM,
146: Timeout => 10);
147: if($client) {
148: last; # Connected!
149: }
150: sleep(1); # Try again later if failed connection.
151: }
152: my $answer;
153: if ($client) {
154: print $client "$cmd\n";
155: $answer=<$client>;
156: if (!$answer) { $answer="con_lost"; }
157: chomp($answer);
158: } else {
159: $answer = 'con_lost'; # Failed connection.
160: }
161: return $answer;
162: }
163:
164: sub reply {
165: my ($cmd,$server)=@_;
166: unless (defined($hostname{$server})) { return 'no_such_host'; }
167: my $answer=subreply($cmd,$server);
168: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
169: &logthis("<font color=blue>WARNING:".
170: " $cmd to $server returned $answer</font>");
171: }
172: return $answer;
173: }
174:
175: # ----------------------------------------------------------- Send USR1 to lonc
176:
177: sub reconlonc {
178: my $peerfile=shift;
179: &logthis("Trying to reconnect for $peerfile");
180: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
181: if (open(my $fh,"<$loncfile")) {
182: my $loncpid=<$fh>;
183: chomp($loncpid);
184: if (kill 0 => $loncpid) {
185: &logthis("lonc at pid $loncpid responding, sending USR1");
186: kill USR1 => $loncpid;
187: sleep 1;
188: if (-e "$peerfile") { return; }
189: &logthis("$peerfile still not there, give it another try");
190: sleep 5;
191: if (-e "$peerfile") { return; }
192: &logthis(
193: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
194: } else {
195: &logthis(
196: "<font color=blue>WARNING:".
197: " lonc at pid $loncpid not responding, giving up</font>");
198: }
199: } else {
200: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
201: }
202: }
203:
204: # ------------------------------------------------------ Critical communication
205:
206: sub critical {
207: my ($cmd,$server)=@_;
208: unless ($hostname{$server}) {
209: &logthis("<font color=blue>WARNING:".
210: " Critical message to unknown server ($server)</font>");
211: return 'no_such_host';
212: }
213: my $answer=reply($cmd,$server);
214: if ($answer eq 'con_lost') {
215: &reconlonc("$perlvar{'lonSockDir'}/$server");
216: my $answer=reply($cmd,$server);
217: if ($answer eq 'con_lost') {
218: my $now=time;
219: my $middlename=$cmd;
220: $middlename=substr($middlename,0,16);
221: $middlename=~s/\W//g;
222: my $dfilename=
223: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
224: $dumpcount++;
225: {
226: my $dfh;
227: if (open($dfh,">$dfilename")) {
228: print $dfh "$cmd\n";
229: close($dfh);
230: }
231: }
232: sleep 2;
233: my $wcmd='';
234: {
235: my $dfh;
236: if (open($dfh,"<$dfilename")) {
237: $wcmd=<$dfh>;
238: close($dfh);
239: }
240: }
241: chomp($wcmd);
242: if ($wcmd eq $cmd) {
243: &logthis("<font color=blue>WARNING: ".
244: "Connection buffer $dfilename: $cmd</font>");
245: &logperm("D:$server:$cmd");
246: return 'con_delayed';
247: } else {
248: &logthis("<font color=red>CRITICAL:"
249: ." Critical connection failed: $server $cmd</font>");
250: &logperm("F:$server:$cmd");
251: return 'con_failed';
252: }
253: }
254: }
255: return $answer;
256: }
257:
258: # ------------------------------------------- Transfer profile into environment
259:
260: sub transfer_profile_to_env {
261: my ($lonidsdir,$handle)=@_;
262: my @profile;
263: {
264: open(my $idf,"$lonidsdir/$handle.id");
265: flock($idf,LOCK_SH);
266: @profile=<$idf>;
267: close($idf);
268: }
269: my $envi;
270: my %Remove;
271: for ($envi=0;$envi<=$#profile;$envi++) {
272: chomp($profile[$envi]);
273: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
274: $env{$envname} = $envvalue;
275: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
276: if ($time < time-300) {
277: $Remove{$key}++;
278: }
279: }
280: }
281: $env{'user.environment'} = "$lonidsdir/$handle.id";
282: foreach my $expired_key (keys(%Remove)) {
283: &delenv($expired_key);
284: }
285: }
286:
287: # ---------------------------------------------------------- Append Environment
288:
289: sub appenv {
290: my %newenv=@_;
291: foreach (keys %newenv) {
292: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
293: &logthis("<font color=blue>WARNING: ".
294: "Attempt to modify environment ".$_." to ".$newenv{$_}
295: .'</font>');
296: delete($newenv{$_});
297: } else {
298: $env{$_}=$newenv{$_};
299: }
300: }
301:
302: my $lockfh;
303: unless (open($lockfh,"$env{'user.environment'}")) {
304: return 'error: '.$!;
305: }
306: unless (flock($lockfh,LOCK_EX)) {
307: &logthis("<font color=blue>WARNING: ".
308: 'Could not obtain exclusive lock in appenv: '.$!);
309: close($lockfh);
310: return 'error: '.$!;
311: }
312:
313: my @oldenv;
314: {
315: my $fh;
316: unless (open($fh,"$env{'user.environment'}")) {
317: return 'error: '.$!;
318: }
319: @oldenv=<$fh>;
320: close($fh);
321: }
322: for (my $i=0; $i<=$#oldenv; $i++) {
323: chomp($oldenv[$i]);
324: if ($oldenv[$i] ne '') {
325: my ($name,$value)=split(/=/,$oldenv[$i]);
326: unless (defined($newenv{$name})) {
327: $newenv{$name}=$value;
328: }
329: }
330: }
331: {
332: my $fh;
333: unless (open($fh,">$env{'user.environment'}")) {
334: return 'error';
335: }
336: my $newname;
337: foreach $newname (keys %newenv) {
338: print $fh "$newname=$newenv{$newname}\n";
339: }
340: close($fh);
341: }
342:
343: close($lockfh);
344: return 'ok';
345: }
346: # ----------------------------------------------------- Delete from Environment
347:
348: sub delenv {
349: my $delthis=shift;
350: my %newenv=();
351: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
352: &logthis("<font color=blue>WARNING: ".
353: "Attempt to delete from environment ".$delthis);
354: return 'error';
355: }
356: my @oldenv;
357: {
358: my $fh;
359: unless (open($fh,"$env{'user.environment'}")) {
360: return 'error';
361: }
362: unless (flock($fh,LOCK_SH)) {
363: &logthis("<font color=blue>WARNING: ".
364: 'Could not obtain shared lock in delenv: '.$!);
365: close($fh);
366: return 'error: '.$!;
367: }
368: @oldenv=<$fh>;
369: close($fh);
370: }
371: {
372: my $fh;
373: unless (open($fh,">$env{'user.environment'}")) {
374: return 'error';
375: }
376: unless (flock($fh,LOCK_EX)) {
377: &logthis("<font color=blue>WARNING: ".
378: 'Could not obtain exclusive lock in delenv: '.$!);
379: close($fh);
380: return 'error: '.$!;
381: }
382: foreach (@oldenv) {
383: if ($_=~/^$delthis/) {
384: my ($key,undef) = split('=',$_);
385: delete($env{$key});
386: } else {
387: print $fh $_;
388: }
389: }
390: close($fh);
391: }
392: return 'ok';
393: }
394:
395: # ------------------------------------------ Find out current server userload
396: # there is a copy in lond
397: sub userload {
398: my $numusers=0;
399: {
400: opendir(LONIDS,$perlvar{'lonIDsDir'});
401: my $filename;
402: my $curtime=time;
403: while ($filename=readdir(LONIDS)) {
404: if ($filename eq '.' || $filename eq '..') {next;}
405: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
406: if ($curtime-$mtime < 1800) { $numusers++; }
407: }
408: closedir(LONIDS);
409: }
410: my $userloadpercent=0;
411: my $maxuserload=$perlvar{'lonUserLoadLim'};
412: if ($maxuserload) {
413: $userloadpercent=100*$numusers/$maxuserload;
414: }
415: $userloadpercent=sprintf("%.2f",$userloadpercent);
416: return $userloadpercent;
417: }
418:
419: # ------------------------------------------ Fight off request when overloaded
420:
421: sub overloaderror {
422: my ($r,$checkserver)=@_;
423: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
424: my $loadavg;
425: if ($checkserver eq $perlvar{'lonHostID'}) {
426: open(my $loadfile,'/proc/loadavg');
427: $loadavg=<$loadfile>;
428: $loadavg =~ s/\s.*//g;
429: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
430: close($loadfile);
431: } else {
432: $loadavg=&reply('load',$checkserver);
433: }
434: my $overload=$loadavg-100;
435: if ($overload>0) {
436: $r->err_headers_out->{'Retry-After'}=$overload;
437: $r->log_error('Overload of '.$overload.' on '.$checkserver);
438: return 413;
439: }
440: return '';
441: }
442:
443: # ------------------------------ Find server with least workload from spare.tab
444:
445: sub spareserver {
446: my ($loadpercent,$userloadpercent) = @_;
447: my $tryserver;
448: my $spareserver='';
449: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
450: my $lowestserver=$loadpercent > $userloadpercent?
451: $loadpercent : $userloadpercent;
452: foreach $tryserver (keys %spareid) {
453: my $loadans=reply('load',$tryserver);
454: my $userloadans=reply('userload',$tryserver);
455: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
456: next; #didn't get a number from the server
457: }
458: my $answer;
459: if ($loadans =~ /\d/) {
460: if ($userloadans =~ /\d/) {
461: #both are numbers, pick the bigger one
462: $answer=$loadans > $userloadans?
463: $loadans : $userloadans;
464: } else {
465: $answer = $loadans;
466: }
467: } else {
468: $answer = $userloadans;
469: }
470: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
471: $spareserver="http://$hostname{$tryserver}";
472: $lowestserver=$answer;
473: }
474: }
475: return $spareserver;
476: }
477:
478: # --------------------------------------------- Try to change a user's password
479:
480: sub changepass {
481: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
482: $currentpass = &escape($currentpass);
483: $newpass = &escape($newpass);
484: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
485: $server);
486: if (! $answer) {
487: &logthis("No reply on password change request to $server ".
488: "by $uname in domain $udom.");
489: } elsif ($answer =~ "^ok") {
490: &logthis("$uname in $udom successfully changed their password ".
491: "on $server.");
492: } elsif ($answer =~ "^pwchange_failure") {
493: &logthis("$uname in $udom was unable to change their password ".
494: "on $server. The action was blocked by either lcpasswd ".
495: "or pwchange");
496: } elsif ($answer =~ "^non_authorized") {
497: &logthis("$uname in $udom did not get their password correct when ".
498: "attempting to change it on $server.");
499: } elsif ($answer =~ "^auth_mode_error") {
500: &logthis("$uname in $udom attempted to change their password despite ".
501: "not being locally or internally authenticated on $server.");
502: } elsif ($answer =~ "^unknown_user") {
503: &logthis("$uname in $udom attempted to change their password ".
504: "on $server but were unable to because $server is not ".
505: "their home server.");
506: } elsif ($answer =~ "^refused") {
507: &logthis("$server refused to change $uname in $udom password because ".
508: "it was sent an unencrypted request to change the password.");
509: }
510: return $answer;
511: }
512:
513: # ----------------------- Try to determine user's current authentication scheme
514:
515: sub queryauthenticate {
516: my ($uname,$udom)=@_;
517: my $uhome=&homeserver($uname,$udom);
518: if (!$uhome) {
519: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
520: return 'no_host';
521: }
522: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
523: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
524: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
525: }
526: return $answer;
527: }
528:
529: # --------- Try to authenticate user from domain's lib servers (first this one)
530:
531: sub authenticate {
532: my ($uname,$upass,$udom)=@_;
533: $upass=escape($upass);
534: $uname=~s/\W//g;
535: my $uhome=&homeserver($uname,$udom);
536: if (!$uhome) {
537: &logthis("User $uname at $udom is unknown in authenticate");
538: return 'no_host';
539: }
540: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
541: if ($answer eq 'authorized') {
542: &logthis("User $uname at $udom authorized by $uhome");
543: return $uhome;
544: }
545: if ($answer eq 'non_authorized') {
546: &logthis("User $uname at $udom rejected by $uhome");
547: return 'no_host';
548: }
549: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
550: return 'no_host';
551: }
552:
553: # ---------------------- Find the homebase for a user from domain's lib servers
554:
555: my %homecache;
556: sub homeserver {
557: my ($uname,$udom,$ignoreBadCache)=@_;
558: my $index="$uname:$udom";
559:
560: if (exists($homecache{$index})) { return $homecache{$index}; }
561: my $tryserver;
562: foreach $tryserver (keys %libserv) {
563: next if ($ignoreBadCache ne 'true' &&
564: exists($badServerCache{$tryserver}));
565: if ($hostdom{$tryserver} eq $udom) {
566: my $answer=reply("home:$udom:$uname",$tryserver);
567: if ($answer eq 'found') {
568: return $homecache{$index}=$tryserver;
569: } elsif ($answer eq 'no_host') {
570: $badServerCache{$tryserver}=1;
571: }
572: }
573: }
574: return 'no_host';
575: }
576:
577: # ------------------------------------- Find the usernames behind a list of IDs
578:
579: sub idget {
580: my ($udom,@ids)=@_;
581: my %returnhash=();
582:
583: my $tryserver;
584: foreach $tryserver (keys %libserv) {
585: if ($hostdom{$tryserver} eq $udom) {
586: my $idlist=join('&',@ids);
587: $idlist=~tr/A-Z/a-z/;
588: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
589: my @answer=();
590: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
591: @answer=split(/\&/,$reply);
592: } ;
593: my $i;
594: for ($i=0;$i<=$#ids;$i++) {
595: if ($answer[$i]) {
596: $returnhash{$ids[$i]}=$answer[$i];
597: }
598: }
599: }
600: }
601: return %returnhash;
602: }
603:
604: # ------------------------------------- Find the IDs behind a list of usernames
605:
606: sub idrget {
607: my ($udom,@unames)=@_;
608: my %returnhash=();
609: foreach (@unames) {
610: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
611: }
612: return %returnhash;
613: }
614:
615: # ------------------------------- Store away a list of names and associated IDs
616:
617: sub idput {
618: my ($udom,%ids)=@_;
619: my %servers=();
620: foreach (keys %ids) {
621: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
622: my $uhom=&homeserver($_,$udom);
623: if ($uhom ne 'no_host') {
624: my $id=&escape($ids{$_});
625: $id=~tr/A-Z/a-z/;
626: my $unam=&escape($_);
627: if ($servers{$uhom}) {
628: $servers{$uhom}.='&'.$id.'='.$unam;
629: } else {
630: $servers{$uhom}=$id.'='.$unam;
631: }
632: }
633: }
634: foreach (keys %servers) {
635: &critical('idput:'.$udom.':'.$servers{$_},$_);
636: }
637: }
638:
639: # --------------------------------------------------- Assign a key to a student
640:
641: sub assign_access_key {
642: #
643: # a valid key looks like uname:udom#comments
644: # comments are being appended
645: #
646: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
647: $kdom=
648: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
649: $knum=
650: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
651: $cdom=
652: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
653: $cnum=
654: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
655: $udom=$env{'user.name'} unless (defined($udom));
656: $uname=$env{'user.domain'} unless (defined($uname));
657: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
658: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
659: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
660: # assigned to this person
661: # - this should not happen,
662: # unless something went wrong
663: # the first time around
664: # ready to assign
665: $logentry=$1.'; '.$logentry;
666: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
667: $kdom,$knum) eq 'ok') {
668: # key now belongs to user
669: my $envkey='key.'.$cdom.'_'.$cnum;
670: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
671: &appenv('environment.'.$envkey => $ckey);
672: return 'ok';
673: } else {
674: return
675: 'error: Count not permanently assign key, will need to be re-entered later.';
676: }
677: } else {
678: return 'error: Could not assign key, try again later.';
679: }
680: } elsif (!$existing{$ckey}) {
681: # the key does not exist
682: return 'error: The key does not exist';
683: } else {
684: # the key is somebody else's
685: return 'error: The key is already in use';
686: }
687: }
688:
689: # ------------------------------------------ put an additional comment on a key
690:
691: sub comment_access_key {
692: #
693: # a valid key looks like uname:udom#comments
694: # comments are being appended
695: #
696: my ($ckey,$cdom,$cnum,$logentry)=@_;
697: $cdom=
698: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
699: $cnum=
700: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
701: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
702: if ($existing{$ckey}) {
703: $existing{$ckey}.='; '.$logentry;
704: # ready to assign
705: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
706: $cdom,$cnum) eq 'ok') {
707: return 'ok';
708: } else {
709: return 'error: Count not store comment.';
710: }
711: } else {
712: # the key does not exist
713: return 'error: The key does not exist';
714: }
715: }
716:
717: # ------------------------------------------------------ Generate a set of keys
718:
719: sub generate_access_keys {
720: my ($number,$cdom,$cnum,$logentry)=@_;
721: $cdom=
722: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
723: $cnum=
724: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
725: unless (&allowed('mky',$cdom)) { return 0; }
726: unless (($cdom) && ($cnum)) { return 0; }
727: if ($number>10000) { return 0; }
728: sleep(2); # make sure don't get same seed twice
729: srand(time()^($$+($$<<15))); # from "Programming Perl"
730: my $total=0;
731: for (my $i=1;$i<=$number;$i++) {
732: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
733: sprintf("%lx",int(100000*rand)).'-'.
734: sprintf("%lx",int(100000*rand));
735: $newkey=~s/1/g/g; # folks mix up 1 and l
736: $newkey=~s/0/h/g; # and also 0 and O
737: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
738: if ($existing{$newkey}) {
739: $i--;
740: } else {
741: if (&put('accesskeys',
742: { $newkey => '# generated '.localtime().
743: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
744: '; '.$logentry },
745: $cdom,$cnum) eq 'ok') {
746: $total++;
747: }
748: }
749: }
750: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
751: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
752: return $total;
753: }
754:
755: # ------------------------------------------------------- Validate an accesskey
756:
757: sub validate_access_key {
758: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
759: $cdom=
760: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
761: $cnum=
762: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
763: $udom=$env{'user.domain'} unless (defined($udom));
764: $uname=$env{'user.name'} unless (defined($uname));
765: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
766: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
767: }
768:
769: # ------------------------------------- Find the section of student in a course
770: sub devalidate_getsection_cache {
771: my ($udom,$unam,$courseid)=@_;
772: $courseid=~s/\_/\//g;
773: $courseid=~s/^(\w)/\/$1/;
774: my $hashid="$udom:$unam:$courseid";
775: &devalidate_cache_new('getsection',$hashid);
776: }
777:
778: sub getsection {
779: my ($udom,$unam,$courseid)=@_;
780: my $cachetime=1800;
781: $courseid=~s/\_/\//g;
782: $courseid=~s/^(\w)/\/$1/;
783:
784: my $hashid="$udom:$unam:$courseid";
785: my ($result,$cached)=&is_cached_new('getsection',$hashid);
786: if (defined($cached)) { return $result; }
787:
788: my %Pending;
789: my %Expired;
790: #
791: # Each role can either have not started yet (pending), be active,
792: # or have expired.
793: #
794: # If there is an active role, we are done.
795: #
796: # If there is more than one role which has not started yet,
797: # choose the one which will start sooner
798: # If there is one role which has not started yet, return it.
799: #
800: # If there is more than one expired role, choose the one which ended last.
801: # If there is a role which has expired, return it.
802: #
803: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
804: &homeserver($unam,$udom)))) {
805: my ($key,$value)=split(/\=/,$_);
806: $key=&unescape($key);
807: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
808: my $section=$1;
809: if ($key eq $courseid.'_st') { $section=''; }
810: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
811: my $now=time;
812: if (defined($end) && $end && ($now > $end)) {
813: $Expired{$end}=$section;
814: next;
815: }
816: if (defined($start) && $start && ($now < $start)) {
817: $Pending{$start}=$section;
818: next;
819: }
820: return &do_cache_new('getsection',$hashid,$section,$cachetime);
821: }
822: #
823: # Presumedly there will be few matching roles from the above
824: # loop and the sorting time will be negligible.
825: if (scalar(keys(%Pending))) {
826: my ($time) = sort {$a <=> $b} keys(%Pending);
827: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
828: }
829: if (scalar(keys(%Expired))) {
830: my @sorted = sort {$a <=> $b} keys(%Expired);
831: my $time = pop(@sorted);
832: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
833: }
834: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
835: }
836:
837: sub save_cache {
838: my ($r)=@_;
839: if (! $r->is_initial_req()) { return DECLINED; }
840: &purge_remembered();
841: undef(%env);
842: return OK;
843: }
844:
845: my $to_remember=-1;
846: my %remembered;
847: my %accessed;
848: my $kicks=0;
849: my $hits=0;
850: sub devalidate_cache_new {
851: my ($name,$id,$debug) = @_;
852: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
853: $id=&escape($name.':'.$id);
854: $memcache->delete($id);
855: delete($remembered{$id});
856: delete($accessed{$id});
857: }
858:
859: sub is_cached_new {
860: my ($name,$id,$debug) = @_;
861: $id=&escape($name.':'.$id);
862: if (exists($remembered{$id})) {
863: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
864: $accessed{$id}=[&gettimeofday()];
865: $hits++;
866: return ($remembered{$id},1);
867: }
868: my $value = $memcache->get($id);
869: if (!(defined($value))) {
870: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
871: return (undef,undef);
872: }
873: if ($value eq '__undef__') {
874: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
875: $value=undef;
876: }
877: &make_room($id,$value,$debug);
878: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
879: return ($value,1);
880: }
881:
882: sub do_cache_new {
883: my ($name,$id,$value,$time,$debug) = @_;
884: $id=&escape($name.':'.$id);
885: my $setvalue=$value;
886: if (!defined($setvalue)) {
887: $setvalue='__undef__';
888: }
889: if (!defined($time) ) {
890: $time=600;
891: }
892: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
893: $memcache->set($id,$setvalue,$time);
894: # need to make a copy of $value
895: #&make_room($id,$value,$debug);
896: return $value;
897: }
898:
899: sub make_room {
900: my ($id,$value,$debug)=@_;
901: $remembered{$id}=$value;
902: if ($to_remember<0) { return; }
903: $accessed{$id}=[&gettimeofday()];
904: if (scalar(keys(%remembered)) <= $to_remember) { return; }
905: my $to_kick;
906: my $max_time=0;
907: foreach my $other (keys(%accessed)) {
908: if (&tv_interval($accessed{$other}) > $max_time) {
909: $to_kick=$other;
910: $max_time=&tv_interval($accessed{$other});
911: }
912: }
913: delete($remembered{$to_kick});
914: delete($accessed{$to_kick});
915: $kicks++;
916: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
917: return;
918: }
919:
920: sub purge_remembered {
921: #&logthis("Tossing ".scalar(keys(%remembered)));
922: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
923: undef(%remembered);
924: undef(%accessed);
925: }
926: # ------------------------------------- Read an entry from a user's environment
927:
928: sub userenvironment {
929: my ($udom,$unam,@what)=@_;
930: my %returnhash=();
931: my @answer=split(/\&/,
932: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
933: &homeserver($unam,$udom)));
934: my $i;
935: for ($i=0;$i<=$#what;$i++) {
936: $returnhash{$what[$i]}=&unescape($answer[$i]);
937: }
938: return %returnhash;
939: }
940:
941: # ---------------------------------------------------------- Get a studentphoto
942: sub studentphoto {
943: my ($udom,$unam,$ext) = @_;
944: my $home=&Apache::lonnet::homeserver($unam,$udom);
945: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext",$home);
946: my $url="/uploaded/$udom/$unam/internal/studentphoto.".$ext;
947: if ($ret ne 'ok') {
948: return '/adm/lonKaputt/lonlogo_broken.gif';
949: }
950: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
951: return $tokenurl;
952: }
953:
954: # -------------------------------------------------------------------- New chat
955:
956: sub chatsend {
957: my ($newentry,$anon)=@_;
958: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
959: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
960: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
961: &reply('chatsend:'.$cdom.':'.$cnum.':'.
962: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
963: &escape($newentry)),$chome);
964: }
965:
966: # ------------------------------------------ Find current version of a resource
967:
968: sub getversion {
969: my $fname=&clutter(shift);
970: unless ($fname=~/^\/res\//) { return -1; }
971: return ¤tversion(&filelocation('',$fname));
972: }
973:
974: sub currentversion {
975: my $fname=shift;
976: my ($result,$cached)=&is_cached_new('resversion',$fname);
977: if (defined($cached)) { return $result; }
978: my $author=$fname;
979: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
980: my ($udom,$uname)=split(/\//,$author);
981: my $home=homeserver($uname,$udom);
982: if ($home eq 'no_host') {
983: return -1;
984: }
985: my $answer=reply("currentversion:$fname",$home);
986: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
987: return -1;
988: }
989: return &do_cache_new('resversion',$fname,$answer,600);
990: }
991:
992: # ----------------------------- Subscribe to a resource, return URL if possible
993:
994: sub subscribe {
995: my $fname=shift;
996: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
997: $fname=~s/[\n\r]//g;
998: my $author=$fname;
999: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1000: my ($udom,$uname)=split(/\//,$author);
1001: my $home=homeserver($uname,$udom);
1002: if ($home eq 'no_host') {
1003: return 'not_found';
1004: }
1005: my $answer=reply("sub:$fname",$home);
1006: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1007: $answer.=' by '.$home;
1008: }
1009: return $answer;
1010: }
1011:
1012: # -------------------------------------------------------------- Replicate file
1013:
1014: sub repcopy {
1015: my $filename=shift;
1016: $filename=~s/\/+/\//g;
1017: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1018: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1019: if ($filename=~m|^/home/httpd/html/userfiles/| or
1020: $filename=~m -^/*(uploaded|editupload)/-) {
1021: return &repcopy_userfile($filename);
1022: }
1023: $filename=~s/[\n\r]//g;
1024: my $transname="$filename.in.transfer";
1025: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1026: my $remoteurl=subscribe($filename);
1027: if ($remoteurl =~ /^con_lost by/) {
1028: &logthis("Subscribe returned $remoteurl: $filename");
1029: return 'unavailable';
1030: } elsif ($remoteurl eq 'not_found') {
1031: #&logthis("Subscribe returned not_found: $filename");
1032: return 'not_found';
1033: } elsif ($remoteurl =~ /^rejected by/) {
1034: &logthis("Subscribe returned $remoteurl: $filename");
1035: return 'forbidden';
1036: } elsif ($remoteurl eq 'directory') {
1037: return 'ok';
1038: } else {
1039: my $author=$filename;
1040: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1041: my ($udom,$uname)=split(/\//,$author);
1042: my $home=homeserver($uname,$udom);
1043: unless ($home eq $perlvar{'lonHostID'}) {
1044: my @parts=split(/\//,$filename);
1045: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1046: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1047: &logthis("Malconfiguration for replication: $filename");
1048: return 'bad_request';
1049: }
1050: my $count;
1051: for ($count=5;$count<$#parts;$count++) {
1052: $path.="/$parts[$count]";
1053: if ((-e $path)!=1) {
1054: mkdir($path,0777);
1055: }
1056: }
1057: my $ua=new LWP::UserAgent;
1058: my $request=new HTTP::Request('GET',"$remoteurl");
1059: my $response=$ua->request($request,$transname);
1060: if ($response->is_error()) {
1061: unlink($transname);
1062: my $message=$response->status_line;
1063: &logthis("<font color=blue>WARNING:"
1064: ." LWP get: $message: $filename</font>");
1065: return 'unavailable';
1066: } else {
1067: if ($remoteurl!~/\.meta$/) {
1068: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1069: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1070: if ($mresponse->is_error()) {
1071: unlink($filename.'.meta');
1072: &logthis(
1073: "<font color=yellow>INFO: No metadata: $filename</font>");
1074: }
1075: }
1076: rename($transname,$filename);
1077: return 'ok';
1078: }
1079: }
1080: }
1081: }
1082:
1083: # ------------------------------------------------ Get server side include body
1084: sub ssi_body {
1085: my ($filelink,%form)=@_;
1086: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1087: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1088: }
1089: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1090: &ssi($filelink,%form));
1091: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1092: $output=~s/^.*?\<body[^\>]*\>//si;
1093: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1094: return $output;
1095: }
1096:
1097: # --------------------------------------------------------- Server Side Include
1098:
1099: sub ssi {
1100:
1101: my ($fn,%form)=@_;
1102:
1103: my $ua=new LWP::UserAgent;
1104:
1105: my $request;
1106:
1107: if (%form) {
1108: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1109: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1110: } else {
1111: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1112: }
1113:
1114: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1115: my $response=$ua->request($request);
1116:
1117: return $response->content;
1118: }
1119:
1120: sub externalssi {
1121: my ($url)=@_;
1122: my $ua=new LWP::UserAgent;
1123: my $request=new HTTP::Request('GET',$url);
1124: my $response=$ua->request($request);
1125: return $response->content;
1126: }
1127:
1128: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1129:
1130: sub allowuploaded {
1131: my ($srcurl,$url)=@_;
1132: $url=&clutter(&declutter($url));
1133: my $dir=$url;
1134: $dir=~s/\/[^\/]+$//;
1135: my %httpref=();
1136: my $httpurl=&hreflocation('',$url);
1137: $httpref{'httpref.'.$httpurl}=$srcurl;
1138: &Apache::lonnet::appenv(%httpref);
1139: }
1140:
1141: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1142: # input: action, courseID, current domain, intended
1143: # path to file, source of file, instruction to parse file for objects,
1144: # ref to hash for embedded objects,
1145: # ref to hash for codebase of java objects.
1146: #
1147: # output: url to file (if action was uploaddoc),
1148: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1149: #
1150: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1151: # course.
1152: #
1153: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1154: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1155: # course's home server.
1156: #
1157: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1158: # be copied from $source (current location) to
1159: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1160: # and will then be copied to
1161: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1162: # course's home server.
1163: #
1164: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1165: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1166: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1167: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1168: # in course's home server.
1169: #
1170:
1171: sub process_coursefile {
1172: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1173: my $fetchresult;
1174: my $home=&homeserver($docuname,$docudom);
1175: if ($action eq 'propagate') {
1176: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1177: $home);
1178: } else {
1179: my $fetchresult = '';
1180: my $fpath = '';
1181: my $fname = $file;
1182: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1183: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1184: my $filepath = &build_filepath($fpath);
1185: if ($action eq 'copy') {
1186: if ($source eq '') {
1187: $fetchresult = 'no source file';
1188: return $fetchresult;
1189: } else {
1190: my $destination = $filepath.'/'.$fname;
1191: rename($source,$destination);
1192: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1193: $home);
1194: }
1195: } elsif ($action eq 'uploaddoc') {
1196: open(my $fh,'>'.$filepath.'/'.$fname);
1197: print $fh $env{'form.'.$source};
1198: close($fh);
1199: if ($parser eq 'parse') {
1200: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1201: unless ($parse_result eq 'ok') {
1202: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1203: }
1204: }
1205: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1206: $home);
1207: if ($fetchresult eq 'ok') {
1208: return '/uploaded/'.$fpath.'/'.$fname;
1209: } else {
1210: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1211: ' to host '.$home.': '.$fetchresult);
1212: return '/adm/notfound.html';
1213: }
1214: }
1215: }
1216: unless ( $fetchresult eq 'ok') {
1217: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1218: ' to host '.$home.': '.$fetchresult);
1219: }
1220: return $fetchresult;
1221: }
1222:
1223: sub build_filepath {
1224: my ($fpath) = @_;
1225: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1226: unless ($fpath eq '') {
1227: my @parts=split('/',$fpath);
1228: foreach my $part (@parts) {
1229: $filepath.= '/'.$part;
1230: if ((-e $filepath)!=1) {
1231: mkdir($filepath,0777);
1232: }
1233: }
1234: }
1235: return $filepath;
1236: }
1237:
1238: sub store_edited_file {
1239: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1240: my $file = $primary_url;
1241: $file =~ s#^/uploaded/$docudom/$docuname/##;
1242: my $fpath = '';
1243: my $fname = $file;
1244: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1245: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1246: my $filepath = &build_filepath($fpath);
1247: open(my $fh,'>'.$filepath.'/'.$fname);
1248: print $fh $content;
1249: close($fh);
1250: my $home=&homeserver($docuname,$docudom);
1251: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1252: $home);
1253: if ($$fetchresult eq 'ok') {
1254: return '/uploaded/'.$fpath.'/'.$fname;
1255: } else {
1256: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1257: ' to host '.$home.': '.$$fetchresult);
1258: return '/adm/notfound.html';
1259: }
1260: }
1261:
1262: sub clean_filename {
1263: my ($fname)=@_;
1264: # Replace Windows backslashes by forward slashes
1265: $fname=~s/\\/\//g;
1266: # Get rid of everything but the actual filename
1267: $fname=~s/^.*\/([^\/]+)$/$1/;
1268: # Replace spaces by underscores
1269: $fname=~s/\s+/\_/g;
1270: # Replace all other weird characters by nothing
1271: $fname=~s/[^\w\.\-]//g;
1272: # Replace all .\d. sequences with _\d. so they no longer look like version
1273: # numbers
1274: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1275: return $fname;
1276: }
1277:
1278: # --------------- Take an uploaded file and put it into the userfiles directory
1279: # input: name of form element, coursedoc=1 means this is for the course
1280: # output: url of file in userspace
1281:
1282:
1283: sub userfileupload {
1284: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase)=@_;
1285: if (!defined($subdir)) { $subdir='unknown'; }
1286: my $fname=$env{'form.'.$formname.'.filename'};
1287: $fname=&clean_filename($fname);
1288: # See if there is anything left
1289: unless ($fname) { return 'error: no uploaded file'; }
1290: chop($env{'form.'.$formname});
1291: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1292: my $now = time;
1293: my $filepath = 'tmp/helprequests/'.$now;
1294: my @parts=split(/\//,$filepath);
1295: my $fullpath = $perlvar{'lonDaemons'};
1296: for (my $i=0;$i<@parts;$i++) {
1297: $fullpath .= '/'.$parts[$i];
1298: if ((-e $fullpath)!=1) {
1299: mkdir($fullpath,0777);
1300: }
1301: }
1302: open(my $fh,'>'.$fullpath.'/'.$fname);
1303: print $fh $env{'form.'.$formname};
1304: close($fh);
1305: return $fullpath.'/'.$fname;
1306: }
1307: # Create the directory if not present
1308: $fname="$subdir/$fname";
1309: if ($coursedoc) {
1310: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1311: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1312: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1313: return &finishuserfileupload($docuname,$docudom,
1314: $formname,$fname,$parser,$allfiles,
1315: $codebase);
1316: } else {
1317: $fname=$env{'form.folder'}.'/'.$fname;
1318: return &process_coursefile('uploaddoc',$docuname,$docudom,
1319: $fname,$formname,$parser,
1320: $allfiles,$codebase);
1321: }
1322: } else {
1323: my $docuname=$env{'user.name'};
1324: my $docudom=$env{'user.domain'};
1325: return &finishuserfileupload($docuname,$docudom,$formname,
1326: $fname,$parser,$allfiles,$codebase);
1327: }
1328: }
1329:
1330: sub finishuserfileupload {
1331: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1332: my $path=$docudom.'/'.$docuname.'/';
1333: my $filepath=$perlvar{'lonDocRoot'};
1334: my ($fnamepath,$file);
1335: $file=$fname;
1336: if ($fname=~m|/|) {
1337: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1338: $path.=$fnamepath.'/';
1339: }
1340: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1341: my $count;
1342: for ($count=4;$count<=$#parts;$count++) {
1343: $filepath.="/$parts[$count]";
1344: if ((-e $filepath)!=1) {
1345: mkdir($filepath,0777);
1346: }
1347: }
1348: # Save the file
1349: {
1350: open(FH,'>'.$filepath.'/'.$file);
1351: print FH $env{'form.'.$formname};
1352: close(FH);
1353: }
1354: if ($parser eq 'parse') {
1355: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1356: $codebase);
1357: unless ($parse_result eq 'ok') {
1358: &logthis('Failed to parse '.$filepath.$file.
1359: ' for embedded media: '.$parse_result);
1360: }
1361: }
1362: # Notify homeserver to grep it
1363: #
1364: my $docuhome=&homeserver($docuname,$docudom);
1365: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1366: if ($fetchresult eq 'ok') {
1367: #
1368: # Return the URL to it
1369: return '/uploaded/'.$path.$file;
1370: } else {
1371: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1372: ': '.$fetchresult);
1373: return '/adm/notfound.html';
1374: }
1375: }
1376:
1377: sub extract_embedded_items {
1378: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1379: my @state = ();
1380: my %javafiles = (
1381: codebase => '',
1382: code => '',
1383: archive => ''
1384: );
1385: my %mediafiles = (
1386: src => '',
1387: movie => '',
1388: );
1389: my $p;
1390: if ($content) {
1391: $p = HTML::LCParser->new($content);
1392: } else {
1393: $p = HTML::LCParser->new($filepath.'/'.$file);
1394: }
1395: while (my $t=$p->get_token()) {
1396: if ($t->[0] eq 'S') {
1397: my ($tagname, $attr) = ($t->[1],$t->[2]);
1398: push (@state, $tagname);
1399: if (lc($tagname) eq 'allow') {
1400: &add_filetype($allfiles,$attr->{'src'},'src');
1401: }
1402: if (lc($tagname) eq 'img') {
1403: &add_filetype($allfiles,$attr->{'src'},'src');
1404: }
1405: if (lc($tagname) eq 'script') {
1406: if ($attr->{'archive'} =~ /\.jar$/i) {
1407: &add_filetype($allfiles,$attr->{'archive'},'archive');
1408: } else {
1409: &add_filetype($allfiles,$attr->{'src'},'src');
1410: }
1411: }
1412: if (lc($tagname) eq 'link') {
1413: if (lc($attr->{'rel'}) eq 'stylesheet') {
1414: &add_filetype($allfiles,$attr->{'href'},'href');
1415: }
1416: }
1417: if (lc($tagname) eq 'object' ||
1418: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1419: foreach my $item (keys(%javafiles)) {
1420: $javafiles{$item} = '';
1421: }
1422: }
1423: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1424: my $name = lc($attr->{'name'});
1425: foreach my $item (keys(%javafiles)) {
1426: if ($name eq $item) {
1427: $javafiles{$item} = $attr->{'value'};
1428: last;
1429: }
1430: }
1431: foreach my $item (keys(%mediafiles)) {
1432: if ($name eq $item) {
1433: &add_filetype($allfiles, $attr->{'value'}, 'value');
1434: last;
1435: }
1436: }
1437: }
1438: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1439: foreach my $item (keys(%javafiles)) {
1440: if ($attr->{$item}) {
1441: $javafiles{$item} = $attr->{$item};
1442: last;
1443: }
1444: }
1445: foreach my $item (keys(%mediafiles)) {
1446: if ($attr->{$item}) {
1447: &add_filetype($allfiles,$attr->{$item},$item);
1448: last;
1449: }
1450: }
1451: }
1452: } elsif ($t->[0] eq 'E') {
1453: my ($tagname) = ($t->[1]);
1454: if ($javafiles{'codebase'} ne '') {
1455: $javafiles{'codebase'} .= '/';
1456: }
1457: if (lc($tagname) eq 'applet' ||
1458: lc($tagname) eq 'object' ||
1459: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1460: ) {
1461: foreach my $item (keys(%javafiles)) {
1462: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1463: my $file=$javafiles{'codebase'}.$javafiles{$item};
1464: &add_filetype($allfiles,$file,$item);
1465: }
1466: }
1467: }
1468: pop @state;
1469: }
1470: }
1471: return 'ok';
1472: }
1473:
1474: sub add_filetype {
1475: my ($allfiles,$file,$type)=@_;
1476: if (exists($allfiles->{$file})) {
1477: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1478: push(@{$allfiles->{$file}}, &escape($type));
1479: }
1480: } else {
1481: @{$allfiles->{$file}} = (&escape($type));
1482: }
1483: }
1484:
1485: sub removeuploadedurl {
1486: my ($url)=@_;
1487: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1488: return &removeuserfile($uname,$udom,$fname);
1489: }
1490:
1491: sub removeuserfile {
1492: my ($docuname,$docudom,$fname)=@_;
1493: my $home=&homeserver($docuname,$docudom);
1494: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1495: }
1496:
1497: sub mkdiruserfile {
1498: my ($docuname,$docudom,$dir)=@_;
1499: my $home=&homeserver($docuname,$docudom);
1500: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1501: }
1502:
1503: sub renameuserfile {
1504: my ($docuname,$docudom,$old,$new)=@_;
1505: my $home=&homeserver($docuname,$docudom);
1506: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1507: &escape("$new"),$home);
1508: }
1509:
1510: # ------------------------------------------------------------------------- Log
1511:
1512: sub log {
1513: my ($dom,$nam,$hom,$what)=@_;
1514: return critical("log:$dom:$nam:$what",$hom);
1515: }
1516:
1517: # ------------------------------------------------------------------ Course Log
1518: #
1519: # This routine flushes several buffers of non-mission-critical nature
1520: #
1521:
1522: sub flushcourselogs {
1523: &logthis('Flushing log buffers');
1524: #
1525: # course logs
1526: # This is a log of all transactions in a course, which can be used
1527: # for data mining purposes
1528: #
1529: # It also collects the courseid database, which lists last transaction
1530: # times and course titles for all courseids
1531: #
1532: my %courseidbuffer=();
1533: foreach (keys %courselogs) {
1534: my $crsid=$_;
1535: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1536: &escape($courselogs{$crsid}),
1537: $coursehombuf{$crsid}) eq 'ok') {
1538: delete $courselogs{$crsid};
1539: } else {
1540: &logthis('Failed to flush log buffer for '.$crsid);
1541: if (length($courselogs{$crsid})>40000) {
1542: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1543: " exceeded maximum size, deleting.</font>");
1544: delete $courselogs{$crsid};
1545: }
1546: }
1547: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1548: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1549: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1550: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1551: } else {
1552: $courseidbuffer{$coursehombuf{$crsid}}=
1553: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1554: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1555: }
1556: }
1557: #
1558: # Write course id database (reverse lookup) to homeserver of courses
1559: # Is used in pickcourse
1560: #
1561: foreach (keys %courseidbuffer) {
1562: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1563: }
1564: #
1565: # File accesses
1566: # Writes to the dynamic metadata of resources to get hit counts, etc.
1567: #
1568: foreach my $entry (keys(%accesshash)) {
1569: if ($entry =~ /___count$/) {
1570: my ($dom,$name);
1571: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1572: if (! defined($dom) || $dom eq '' ||
1573: ! defined($name) || $name eq '') {
1574: my $cid = $env{'request.course.id'};
1575: $dom = $env{'request.'.$cid.'.domain'};
1576: $name = $env{'request.'.$cid.'.num'};
1577: }
1578: my $value = $accesshash{$entry};
1579: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1580: my %temphash=($url => $value);
1581: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1582: if ($result eq 'ok') {
1583: delete $accesshash{$entry};
1584: } elsif ($result eq 'unknown_cmd') {
1585: # Target server has old code running on it.
1586: my %temphash=($entry => $value);
1587: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1588: delete $accesshash{$entry};
1589: }
1590: }
1591: } else {
1592: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1593: my %temphash=($entry => $accesshash{$entry});
1594: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1595: delete $accesshash{$entry};
1596: }
1597: }
1598: }
1599: #
1600: # Roles
1601: # Reverse lookup of user roles for course faculty/staff and co-authorship
1602: #
1603: foreach (keys %userrolehash) {
1604: my $entry=$_;
1605: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1606: split(/\:/,$entry);
1607: if (&Apache::lonnet::put('nohist_userroles',
1608: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1609: $rudom,$runame) eq 'ok') {
1610: delete $userrolehash{$entry};
1611: }
1612: }
1613: #
1614: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1615: #
1616: my %domrolebuffer = ();
1617: foreach my $entry (keys %domainrolehash) {
1618: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1619: if ($domrolebuffer{$rudom}) {
1620: $domrolebuffer{$rudom}.='&'.&escape($entry).
1621: '='.&escape($domainrolehash{$entry});
1622: } else {
1623: $domrolebuffer{$rudom}.=&escape($entry).
1624: '='.&escape($domainrolehash{$entry});
1625: }
1626: delete $domainrolehash{$entry};
1627: }
1628: foreach my $dom (keys(%domrolebuffer)) {
1629: foreach my $tryserver (keys %libserv) {
1630: if ($hostdom{$tryserver} eq $dom) {
1631: unless (&reply('domroleput:'.$dom.':'.
1632: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1633: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1634: }
1635: }
1636: }
1637: }
1638: $dumpcount++;
1639: }
1640:
1641: sub courselog {
1642: my $what=shift;
1643: $what=time.':'.$what;
1644: unless ($env{'request.course.id'}) { return ''; }
1645: $coursedombuf{$env{'request.course.id'}}=
1646: $env{'course.'.$env{'request.course.id'}.'.domain'};
1647: $coursenumbuf{$env{'request.course.id'}}=
1648: $env{'course.'.$env{'request.course.id'}.'.num'};
1649: $coursehombuf{$env{'request.course.id'}}=
1650: $env{'course.'.$env{'request.course.id'}.'.home'};
1651: $coursedescrbuf{$env{'request.course.id'}}=
1652: $env{'course.'.$env{'request.course.id'}.'.description'};
1653: $courseinstcodebuf{$env{'request.course.id'}}=
1654: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1655: $courseownerbuf{$env{'request.course.id'}}=
1656: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1657: if (defined $courselogs{$env{'request.course.id'}}) {
1658: $courselogs{$env{'request.course.id'}}.='&'.$what;
1659: } else {
1660: $courselogs{$env{'request.course.id'}}.=$what;
1661: }
1662: if (length($courselogs{$env{'request.course.id'}})>4048) {
1663: &flushcourselogs();
1664: }
1665: }
1666:
1667: sub courseacclog {
1668: my $fnsymb=shift;
1669: unless ($env{'request.course.id'}) { return ''; }
1670: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1671: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1672: $what.=':POST';
1673: # FIXME: Probably ought to escape things....
1674: foreach (keys %env) {
1675: if ($_=~/^form\.(.*)/) {
1676: $what.=':'.$1.'='.$env{$_};
1677: }
1678: }
1679: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1680: # FIXME: We should not be depending on a form parameter that someone
1681: # editing lonsearchcat.pm might change in the future.
1682: if ($env{'form.phase'} eq 'course_search') {
1683: $what.= ':POST';
1684: # FIXME: Probably ought to escape things....
1685: foreach my $element ('courseexp','crsfulltext','crsrelated',
1686: 'crsdiscuss') {
1687: $what.=':'.$element.'='.$env{'form.'.$element};
1688: }
1689: }
1690: }
1691: &courselog($what);
1692: }
1693:
1694: sub countacc {
1695: my $url=&declutter(shift);
1696: return if (! defined($url) || $url eq '');
1697: unless ($env{'request.course.id'}) { return ''; }
1698: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1699: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1700: $accesshash{$key}++;
1701: }
1702:
1703: sub linklog {
1704: my ($from,$to)=@_;
1705: $from=&declutter($from);
1706: $to=&declutter($to);
1707: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1708: $accesshash{$to.'___'.$from.'___goto'}=1;
1709: }
1710:
1711: sub userrolelog {
1712: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1713: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1714: ($trole=~/^in/) || ($trole=~/^cc/) ||
1715: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1716: ($trole=~/^ta/)) {
1717: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1718: $userrolehash
1719: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1720: =$tend.':'.$tstart;
1721: }
1722: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1723: ($trole=~/^li/) || ($trole=~/^li/) ||
1724: ($trole=~/^au/) || ($trole=~/^dg/) ||
1725: ($trole=~/^sc/)) {
1726: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1727: $domainrolehash
1728: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1729: = $tend.':'.$tstart;
1730: }
1731: }
1732:
1733: sub get_course_adv_roles {
1734: my $cid=shift;
1735: $cid=$env{'request.course.id'} unless (defined($cid));
1736: my %coursehash=&coursedescription($cid);
1737: my %nothide=();
1738: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1739: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1740: }
1741: my %returnhash=();
1742: my %dumphash=
1743: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1744: my $now=time;
1745: foreach (keys %dumphash) {
1746: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1747: if (($tstart) && ($tstart<0)) { next; }
1748: if (($tend) && ($tend<$now)) { next; }
1749: if (($tstart) && ($now<$tstart)) { next; }
1750: my ($role,$username,$domain,$section)=split(/\:/,$_);
1751: if ($username eq '' || $domain eq '') { next; }
1752: if ((&privileged($username,$domain)) &&
1753: (!$nothide{$username.':'.$domain})) { next; }
1754: if ($role eq 'cr') { next; }
1755: my $key=&plaintext($role);
1756: if ($role =~ /^cr/) {
1757: $key=(split('/',$role))[3];
1758: }
1759: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1760: if ($returnhash{$key}) {
1761: $returnhash{$key}.=','.$username.':'.$domain;
1762: } else {
1763: $returnhash{$key}=$username.':'.$domain;
1764: }
1765: }
1766: return %returnhash;
1767: }
1768:
1769: sub get_my_roles {
1770: my ($uname,$udom)=@_;
1771: unless (defined($uname)) { $uname=$env{'user.name'}; }
1772: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1773: my %dumphash=
1774: &dump('nohist_userroles',$udom,$uname);
1775: my %returnhash=();
1776: my $now=time;
1777: foreach (keys %dumphash) {
1778: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1779: if (($tstart) && ($tstart<0)) { next; }
1780: if (($tend) && ($tend<$now)) { next; }
1781: if (($tstart) && ($now<$tstart)) { next; }
1782: my ($role,$username,$domain,$section)=split(/\:/,$_);
1783: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1784: }
1785: return %returnhash;
1786: }
1787:
1788: # ----------------------------------------------------- Frontpage Announcements
1789: #
1790: #
1791:
1792: sub postannounce {
1793: my ($server,$text)=@_;
1794: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1795: unless ($text=~/\w/) { $text=''; }
1796: return &reply('setannounce:'.&escape($text),$server);
1797: }
1798:
1799: sub getannounce {
1800:
1801: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1802: my $announcement='';
1803: while (<$fh>) { $announcement .=$_; }
1804: close($fh);
1805: if ($announcement=~/\w/) {
1806: return
1807: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1808: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1809: } else {
1810: return '';
1811: }
1812: } else {
1813: return '';
1814: }
1815: }
1816:
1817: # ---------------------------------------------------------- Course ID routines
1818: # Deal with domain's nohist_courseid.db files
1819: #
1820:
1821: sub courseidput {
1822: my ($domain,$what,$coursehome)=@_;
1823: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1824: }
1825:
1826: sub courseiddump {
1827: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref)=@_;
1828: my %returnhash=();
1829: unless ($domfilter) { $domfilter=''; }
1830: foreach my $tryserver (keys %libserv) {
1831: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1832: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1833: foreach (
1834: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1835: $sincefilter.':'.&escape($descfilter).':'.
1836: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter),
1837: $tryserver))) {
1838: my ($key,$value)=split(/\=/,$_);
1839: if (($key) && ($value)) {
1840: $returnhash{&unescape($key)}=$value;
1841: }
1842: }
1843: }
1844: }
1845: }
1846: return %returnhash;
1847: }
1848:
1849: # ---------------------------------------------------------- DC e-mail
1850:
1851: sub dcmailput {
1852: my ($domain,$msgid,$contents,$server)=@_;
1853: my $status = &Apache::lonnet::critical(
1854: 'dcmailput:'.$domain.':'.&Apache::lonnet::escape($msgid).'='.
1855: &Apache::lonnet::escape($$contents{$server}),$server);
1856: return $status;
1857: }
1858:
1859: sub dcmaildump {
1860: my ($dom,$startdate,$enddate,$senders) = @_;
1861: my %returnhash=();
1862: foreach my $tryserver (keys(%libserv)) {
1863: if ($hostdom{$tryserver} eq $dom) {
1864: %{$returnhash{$tryserver}}=();
1865: my $cmd='dcmaildump:'.$dom.':'.
1866: &escape($startdate).':'.&escape($enddate).':';
1867: my @esc_senders=map { &escape($_)} @$senders;
1868: $cmd.=&escape(join('&',@esc_senders));
1869: foreach (split(/\&/,&reply($cmd,$tryserver))) {
1870: my ($key,$value) = split(/\=/,$_);
1871: if (($key) && ($value)) {
1872: $returnhash{$tryserver}{&unescape($key)} = &unescape($value);
1873: }
1874: }
1875: }
1876: }
1877: return %returnhash;
1878: }
1879: # ---------------------------------------------------------- Domain roles
1880:
1881: sub get_domain_roles {
1882: my ($dom,$roles,$startdate,$enddate)=@_;
1883: if (undef($startdate) || $startdate eq '') {
1884: $startdate = '.';
1885: }
1886: if (undef($enddate) || $enddate eq '') {
1887: $enddate = '.';
1888: }
1889: my $rolelist = join(':',@{$roles});
1890: my %personnel = ();
1891: foreach my $tryserver (keys(%libserv)) {
1892: if ($hostdom{$tryserver} eq $dom) {
1893: %{$personnel{$tryserver}}=();
1894: foreach (
1895: split(/\&/,&reply('domrolesdump:'.$dom.':'.
1896: &escape($startdate).':'.&escape($enddate).':'.
1897: &escape($rolelist), $tryserver))) {
1898: my($key,$value) = split(/\=/,$_);
1899: if (($key) && ($value)) {
1900: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
1901: }
1902: }
1903: }
1904: }
1905: return %personnel;
1906: }
1907:
1908: # ----------------------------------------------------------- Check out an item
1909:
1910: sub get_first_access {
1911: my ($type,$argsymb)=@_;
1912: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1913: if ($argsymb) { $symb=$argsymb; }
1914: my ($map,$id,$res)=&decode_symb($symb);
1915: if ($type eq 'map') {
1916: $res=&symbread($map);
1917: } else {
1918: $res=$symb;
1919: }
1920: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
1921: return $times{"$courseid\0$res"};
1922: }
1923:
1924: sub set_first_access {
1925: my ($type)=@_;
1926: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1927: my ($map,$id,$res)=&decode_symb($symb);
1928: if ($type eq 'map') {
1929: $res=&symbread($map);
1930: } else {
1931: $res=$symb;
1932: }
1933: my $firstaccess=&get_first_access($type,$symb);
1934: if (!$firstaccess) {
1935: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
1936: }
1937: return 'already_set';
1938: }
1939:
1940: sub checkout {
1941: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1942: my $now=time;
1943: my $lonhost=$perlvar{'lonHostID'};
1944: my $infostr=&escape(
1945: 'CHECKOUTTOKEN&'.
1946: $tuname.'&'.
1947: $tudom.'&'.
1948: $tcrsid.'&'.
1949: $symb.'&'.
1950: $now.'&'.$ENV{'REMOTE_ADDR'});
1951: my $token=&reply('tmpput:'.$infostr,$lonhost);
1952: if ($token=~/^error\:/) {
1953: &logthis("<font color=blue>WARNING: ".
1954: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1955: "</font>");
1956: return '';
1957: }
1958:
1959: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1960: $token=~tr/a-z/A-Z/;
1961:
1962: my %infohash=('resource.0.outtoken' => $token,
1963: 'resource.0.checkouttime' => $now,
1964: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1965:
1966: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1967: return '';
1968: } else {
1969: &logthis("<font color=blue>WARNING: ".
1970: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1971: "</font>");
1972: }
1973:
1974: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1975: &escape('Checkout '.$infostr.' - '.
1976: $token)) ne 'ok') {
1977: return '';
1978: } else {
1979: &logthis("<font color=blue>WARNING: ".
1980: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1981: "</font>");
1982: }
1983: return $token;
1984: }
1985:
1986: # ------------------------------------------------------------ Check in an item
1987:
1988: sub checkin {
1989: my $token=shift;
1990: my $now=time;
1991: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1992: $lonhost=~tr/A-Z/a-z/;
1993: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
1994: $dtoken=~s/\W/\_/g;
1995: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1996: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1997:
1998: unless (($tuname) && ($tudom)) {
1999: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2000: return '';
2001: }
2002:
2003: unless (&allowed('mgr',$tcrsid)) {
2004: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2005: $env{'user.name'}.' - '.$env{'user.domain'});
2006: return '';
2007: }
2008:
2009: my %infohash=('resource.0.intoken' => $token,
2010: 'resource.0.checkintime' => $now,
2011: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2012:
2013: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2014: return '';
2015: }
2016:
2017: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2018: &escape('Checkin - '.$token)) ne 'ok') {
2019: return '';
2020: }
2021:
2022: return ($symb,$tuname,$tudom,$tcrsid);
2023: }
2024:
2025: # --------------------------------------------- Set Expire Date for Spreadsheet
2026:
2027: sub expirespread {
2028: my ($uname,$udom,$stype,$usymb)=@_;
2029: my $cid=$env{'request.course.id'};
2030: if ($cid) {
2031: my $now=time;
2032: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2033: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2034: $env{'course.'.$cid.'.num'}.
2035: ':nohist_expirationdates:'.
2036: &escape($key).'='.$now,
2037: $env{'course.'.$cid.'.home'})
2038: }
2039: return 'ok';
2040: }
2041:
2042: # ----------------------------------------------------- Devalidate Spreadsheets
2043:
2044: sub devalidate {
2045: my ($symb,$uname,$udom)=@_;
2046: my $cid=$env{'request.course.id'};
2047: if ($cid) {
2048: # delete the stored spreadsheets for
2049: # - the student level sheet of this user in course's homespace
2050: # - the assessment level sheet for this resource
2051: # for this user in user's homespace
2052: # - current conditional state info
2053: my $key=$uname.':'.$udom.':';
2054: my $status=
2055: &del('nohist_calculatedsheets',
2056: [$key.'studentcalc:'],
2057: $env{'course.'.$cid.'.domain'},
2058: $env{'course.'.$cid.'.num'})
2059: .' '.
2060: &del('nohist_calculatedsheets_'.$cid,
2061: [$key.'assesscalc:'.$symb],$udom,$uname);
2062: unless ($status eq 'ok ok') {
2063: &logthis('Could not devalidate spreadsheet '.
2064: $uname.' at '.$udom.' for '.
2065: $symb.': '.$status);
2066: }
2067: &delenv('user.state.'.$cid);
2068: }
2069: }
2070:
2071: sub get_scalar {
2072: my ($string,$end) = @_;
2073: my $value;
2074: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2075: $value = $1;
2076: } elsif ($$string =~ s/^([^&]*?)&//) {
2077: $value = $1;
2078: }
2079: return &unescape($value);
2080: }
2081:
2082: sub array2str {
2083: my (@array) = @_;
2084: my $result=&arrayref2str(\@array);
2085: $result=~s/^__ARRAY_REF__//;
2086: $result=~s/__END_ARRAY_REF__$//;
2087: return $result;
2088: }
2089:
2090: sub arrayref2str {
2091: my ($arrayref) = @_;
2092: my $result='__ARRAY_REF__';
2093: foreach my $elem (@$arrayref) {
2094: if(ref($elem) eq 'ARRAY') {
2095: $result.=&arrayref2str($elem).'&';
2096: } elsif(ref($elem) eq 'HASH') {
2097: $result.=&hashref2str($elem).'&';
2098: } elsif(ref($elem)) {
2099: #print("Got a ref of ".(ref($elem))." skipping.");
2100: } else {
2101: $result.=&escape($elem).'&';
2102: }
2103: }
2104: $result=~s/\&$//;
2105: $result .= '__END_ARRAY_REF__';
2106: return $result;
2107: }
2108:
2109: sub hash2str {
2110: my (%hash) = @_;
2111: my $result=&hashref2str(\%hash);
2112: $result=~s/^__HASH_REF__//;
2113: $result=~s/__END_HASH_REF__$//;
2114: return $result;
2115: }
2116:
2117: sub hashref2str {
2118: my ($hashref)=@_;
2119: my $result='__HASH_REF__';
2120: foreach (sort(keys(%$hashref))) {
2121: if (ref($_) eq 'ARRAY') {
2122: $result.=&arrayref2str($_).'=';
2123: } elsif (ref($_) eq 'HASH') {
2124: $result.=&hashref2str($_).'=';
2125: } elsif (ref($_)) {
2126: $result.='=';
2127: #print("Got a ref of ".(ref($_))." skipping.");
2128: } else {
2129: if ($_) {$result.=&escape($_).'=';} else { last; }
2130: }
2131:
2132: if(ref($hashref->{$_}) eq 'ARRAY') {
2133: $result.=&arrayref2str($hashref->{$_}).'&';
2134: } elsif(ref($hashref->{$_}) eq 'HASH') {
2135: $result.=&hashref2str($hashref->{$_}).'&';
2136: } elsif(ref($hashref->{$_})) {
2137: $result.='&';
2138: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2139: } else {
2140: $result.=&escape($hashref->{$_}).'&';
2141: }
2142: }
2143: $result=~s/\&$//;
2144: $result .= '__END_HASH_REF__';
2145: return $result;
2146: }
2147:
2148: sub str2hash {
2149: my ($string)=@_;
2150: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2151: return %$hash;
2152: }
2153:
2154: sub str2hashref {
2155: my ($string) = @_;
2156:
2157: my %hash;
2158:
2159: if($string !~ /^__HASH_REF__/) {
2160: if (! ($string eq '' || !defined($string))) {
2161: $hash{'error'}='Not hash reference';
2162: }
2163: return (\%hash, $string);
2164: }
2165:
2166: $string =~ s/^__HASH_REF__//;
2167:
2168: while($string !~ /^__END_HASH_REF__/) {
2169: #key
2170: my $key='';
2171: if($string =~ /^__HASH_REF__/) {
2172: ($key, $string)=&str2hashref($string);
2173: if(defined($key->{'error'})) {
2174: $hash{'error'}='Bad data';
2175: return (\%hash, $string);
2176: }
2177: } elsif($string =~ /^__ARRAY_REF__/) {
2178: ($key, $string)=&str2arrayref($string);
2179: if($key->[0] eq 'Array reference error') {
2180: $hash{'error'}='Bad data';
2181: return (\%hash, $string);
2182: }
2183: } else {
2184: $string =~ s/^(.*?)=//;
2185: $key=&unescape($1);
2186: }
2187: $string =~ s/^=//;
2188:
2189: #value
2190: my $value='';
2191: if($string =~ /^__HASH_REF__/) {
2192: ($value, $string)=&str2hashref($string);
2193: if(defined($value->{'error'})) {
2194: $hash{'error'}='Bad data';
2195: return (\%hash, $string);
2196: }
2197: } elsif($string =~ /^__ARRAY_REF__/) {
2198: ($value, $string)=&str2arrayref($string);
2199: if($value->[0] eq 'Array reference error') {
2200: $hash{'error'}='Bad data';
2201: return (\%hash, $string);
2202: }
2203: } else {
2204: $value=&get_scalar(\$string,'__END_HASH_REF__');
2205: }
2206: $string =~ s/^&//;
2207:
2208: $hash{$key}=$value;
2209: }
2210:
2211: $string =~ s/^__END_HASH_REF__//;
2212:
2213: return (\%hash, $string);
2214: }
2215:
2216: sub str2array {
2217: my ($string)=@_;
2218: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2219: return @$array;
2220: }
2221:
2222: sub str2arrayref {
2223: my ($string) = @_;
2224: my @array;
2225:
2226: if($string !~ /^__ARRAY_REF__/) {
2227: if (! ($string eq '' || !defined($string))) {
2228: $array[0]='Array reference error';
2229: }
2230: return (\@array, $string);
2231: }
2232:
2233: $string =~ s/^__ARRAY_REF__//;
2234:
2235: while($string !~ /^__END_ARRAY_REF__/) {
2236: my $value='';
2237: if($string =~ /^__HASH_REF__/) {
2238: ($value, $string)=&str2hashref($string);
2239: if(defined($value->{'error'})) {
2240: $array[0] ='Array reference error';
2241: return (\@array, $string);
2242: }
2243: } elsif($string =~ /^__ARRAY_REF__/) {
2244: ($value, $string)=&str2arrayref($string);
2245: if($value->[0] eq 'Array reference error') {
2246: $array[0] ='Array reference error';
2247: return (\@array, $string);
2248: }
2249: } else {
2250: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2251: }
2252: $string =~ s/^&//;
2253:
2254: push(@array, $value);
2255: }
2256:
2257: $string =~ s/^__END_ARRAY_REF__//;
2258:
2259: return (\@array, $string);
2260: }
2261:
2262: # -------------------------------------------------------------------Temp Store
2263:
2264: sub tmpreset {
2265: my ($symb,$namespace,$domain,$stuname) = @_;
2266: if (!$symb) {
2267: $symb=&symbread();
2268: if (!$symb) { $symb= $env{'request.url'}; }
2269: }
2270: $symb=escape($symb);
2271:
2272: if (!$namespace) { $namespace=$env{'request.state'}; }
2273: $namespace=~s/\//\_/g;
2274: $namespace=~s/\W//g;
2275:
2276: if (!$domain) { $domain=$env{'user.domain'}; }
2277: if (!$stuname) { $stuname=$env{'user.name'}; }
2278: if ($domain eq 'public' && $stuname eq 'public') {
2279: $stuname=$ENV{'REMOTE_ADDR'};
2280: }
2281: my $path=$perlvar{'lonDaemons'}.'/tmp';
2282: my %hash;
2283: if (tie(%hash,'GDBM_File',
2284: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2285: &GDBM_WRCREAT(),0640)) {
2286: foreach my $key (keys %hash) {
2287: if ($key=~ /:$symb/) {
2288: delete($hash{$key});
2289: }
2290: }
2291: }
2292: }
2293:
2294: sub tmpstore {
2295: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2296:
2297: if (!$symb) {
2298: $symb=&symbread();
2299: if (!$symb) { $symb= $env{'request.url'}; }
2300: }
2301: $symb=escape($symb);
2302:
2303: if (!$namespace) {
2304: # I don't think we would ever want to store this for a course.
2305: # it seems this will only be used if we don't have a course.
2306: #$namespace=$env{'request.course.id'};
2307: #if (!$namespace) {
2308: $namespace=$env{'request.state'};
2309: #}
2310: }
2311: $namespace=~s/\//\_/g;
2312: $namespace=~s/\W//g;
2313: if (!$domain) { $domain=$env{'user.domain'}; }
2314: if (!$stuname) { $stuname=$env{'user.name'}; }
2315: if ($domain eq 'public' && $stuname eq 'public') {
2316: $stuname=$ENV{'REMOTE_ADDR'};
2317: }
2318: my $now=time;
2319: my %hash;
2320: my $path=$perlvar{'lonDaemons'}.'/tmp';
2321: if (tie(%hash,'GDBM_File',
2322: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2323: &GDBM_WRCREAT(),0640)) {
2324: $hash{"version:$symb"}++;
2325: my $version=$hash{"version:$symb"};
2326: my $allkeys='';
2327: foreach my $key (keys(%$storehash)) {
2328: $allkeys.=$key.':';
2329: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2330: }
2331: $hash{"$version:$symb:timestamp"}=$now;
2332: $allkeys.='timestamp';
2333: $hash{"$version:keys:$symb"}=$allkeys;
2334: if (untie(%hash)) {
2335: return 'ok';
2336: } else {
2337: return "error:$!";
2338: }
2339: } else {
2340: return "error:$!";
2341: }
2342: }
2343:
2344: # -----------------------------------------------------------------Temp Restore
2345:
2346: sub tmprestore {
2347: my ($symb,$namespace,$domain,$stuname) = @_;
2348:
2349: if (!$symb) {
2350: $symb=&symbread();
2351: if (!$symb) { $symb= $env{'request.url'}; }
2352: }
2353: $symb=escape($symb);
2354:
2355: if (!$namespace) { $namespace=$env{'request.state'}; }
2356:
2357: if (!$domain) { $domain=$env{'user.domain'}; }
2358: if (!$stuname) { $stuname=$env{'user.name'}; }
2359: if ($domain eq 'public' && $stuname eq 'public') {
2360: $stuname=$ENV{'REMOTE_ADDR'};
2361: }
2362: my %returnhash;
2363: $namespace=~s/\//\_/g;
2364: $namespace=~s/\W//g;
2365: my %hash;
2366: my $path=$perlvar{'lonDaemons'}.'/tmp';
2367: if (tie(%hash,'GDBM_File',
2368: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2369: &GDBM_READER(),0640)) {
2370: my $version=$hash{"version:$symb"};
2371: $returnhash{'version'}=$version;
2372: my $scope;
2373: for ($scope=1;$scope<=$version;$scope++) {
2374: my $vkeys=$hash{"$scope:keys:$symb"};
2375: my @keys=split(/:/,$vkeys);
2376: my $key;
2377: $returnhash{"$scope:keys"}=$vkeys;
2378: foreach $key (@keys) {
2379: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2380: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2381: }
2382: }
2383: if (!(untie(%hash))) {
2384: return "error:$!";
2385: }
2386: } else {
2387: return "error:$!";
2388: }
2389: return %returnhash;
2390: }
2391:
2392: # ----------------------------------------------------------------------- Store
2393:
2394: sub store {
2395: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2396: my $home='';
2397:
2398: if ($stuname) { $home=&homeserver($stuname,$domain); }
2399:
2400: $symb=&symbclean($symb);
2401: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2402:
2403: if (!$domain) { $domain=$env{'user.domain'}; }
2404: if (!$stuname) { $stuname=$env{'user.name'}; }
2405:
2406: &devalidate($symb,$stuname,$domain);
2407:
2408: $symb=escape($symb);
2409: if (!$namespace) {
2410: unless ($namespace=$env{'request.course.id'}) {
2411: return '';
2412: }
2413: }
2414: if (!$home) { $home=$env{'user.home'}; }
2415:
2416: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2417: $$storehash{'host'}=$perlvar{'lonHostID'};
2418:
2419: my $namevalue='';
2420: foreach (keys %$storehash) {
2421: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2422: }
2423: $namevalue=~s/\&$//;
2424: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2425: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2426: }
2427:
2428: # -------------------------------------------------------------- Critical Store
2429:
2430: sub cstore {
2431: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2432: my $home='';
2433:
2434: if ($stuname) { $home=&homeserver($stuname,$domain); }
2435:
2436: $symb=&symbclean($symb);
2437: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2438:
2439: if (!$domain) { $domain=$env{'user.domain'}; }
2440: if (!$stuname) { $stuname=$env{'user.name'}; }
2441:
2442: &devalidate($symb,$stuname,$domain);
2443:
2444: $symb=escape($symb);
2445: if (!$namespace) {
2446: unless ($namespace=$env{'request.course.id'}) {
2447: return '';
2448: }
2449: }
2450: if (!$home) { $home=$env{'user.home'}; }
2451:
2452: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2453: $$storehash{'host'}=$perlvar{'lonHostID'};
2454:
2455: my $namevalue='';
2456: foreach (keys %$storehash) {
2457: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2458: }
2459: $namevalue=~s/\&$//;
2460: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2461: return critical
2462: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2463: }
2464:
2465: # --------------------------------------------------------------------- Restore
2466:
2467: sub restore {
2468: my ($symb,$namespace,$domain,$stuname) = @_;
2469: my $home='';
2470:
2471: if ($stuname) { $home=&homeserver($stuname,$domain); }
2472:
2473: if (!$symb) {
2474: unless ($symb=escape(&symbread())) { return ''; }
2475: } else {
2476: $symb=&escape(&symbclean($symb));
2477: }
2478: if (!$namespace) {
2479: unless ($namespace=$env{'request.course.id'}) {
2480: return '';
2481: }
2482: }
2483: if (!$domain) { $domain=$env{'user.domain'}; }
2484: if (!$stuname) { $stuname=$env{'user.name'}; }
2485: if (!$home) { $home=$env{'user.home'}; }
2486: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2487:
2488: my %returnhash=();
2489: foreach (split(/\&/,$answer)) {
2490: my ($name,$value)=split(/\=/,$_);
2491: $returnhash{&unescape($name)}=&thaw_unescape($value);
2492: }
2493: my $version;
2494: for ($version=1;$version<=$returnhash{'version'};$version++) {
2495: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2496: $returnhash{$_}=$returnhash{$version.':'.$_};
2497: }
2498: }
2499: return %returnhash;
2500: }
2501:
2502: # ---------------------------------------------------------- Course Description
2503:
2504: sub coursedescription {
2505: my $courseid=shift;
2506: $courseid=~s/^\///;
2507: $courseid=~s/\_/\//g;
2508: my ($cdomain,$cnum)=split(/\//,$courseid);
2509: my $chome=&homeserver($cnum,$cdomain);
2510: my $normalid=$cdomain.'_'.$cnum;
2511: # need to always cache even if we get errors otherwise we keep
2512: # trying and trying and trying to get the course description.
2513: my %envhash=();
2514: my %returnhash=();
2515: $envhash{'course.'.$normalid.'.last_cache'}=time;
2516: if ($chome ne 'no_host') {
2517: %returnhash=&dump('environment',$cdomain,$cnum);
2518: if (!exists($returnhash{'con_lost'})) {
2519: $returnhash{'home'}= $chome;
2520: $returnhash{'domain'} = $cdomain;
2521: $returnhash{'num'} = $cnum;
2522: while (my ($name,$value) = each %returnhash) {
2523: $envhash{'course.'.$normalid.'.'.$name}=$value;
2524: }
2525: $returnhash{'url'}=&clutter($returnhash{'url'});
2526: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2527: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2528: $envhash{'course.'.$normalid.'.home'}=$chome;
2529: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2530: $envhash{'course.'.$normalid.'.num'}=$cnum;
2531: }
2532: }
2533: &appenv(%envhash);
2534: return %returnhash;
2535: }
2536:
2537: # -------------------------------------------------See if a user is privileged
2538:
2539: sub privileged {
2540: my ($username,$domain)=@_;
2541: my $rolesdump=&reply("dump:$domain:$username:roles",
2542: &homeserver($username,$domain));
2543: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2544: my $now=time;
2545: if ($rolesdump ne '') {
2546: foreach (split(/&/,$rolesdump)) {
2547: if ($_!~/^rolesdef_/) {
2548: my ($area,$role)=split(/=/,$_);
2549: $area=~s/\_\w\w$//;
2550: my ($trole,$tend,$tstart)=split(/_/,$role);
2551: if (($trole eq 'dc') || ($trole eq 'su')) {
2552: my $active=1;
2553: if ($tend) {
2554: if ($tend<$now) { $active=0; }
2555: }
2556: if ($tstart) {
2557: if ($tstart>$now) { $active=0; }
2558: }
2559: if ($active) { return 1; }
2560: }
2561: }
2562: }
2563: }
2564: return 0;
2565: }
2566:
2567: # -------------------------------------------------------- Get user privileges
2568:
2569: sub rolesinit {
2570: my ($domain,$username,$authhost)=@_;
2571: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2572: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2573: my %allroles=();
2574: my $now=time;
2575: my $userroles="user.login.time=$now\n";
2576:
2577: if ($rolesdump ne '') {
2578: foreach (split(/&/,$rolesdump)) {
2579: if ($_!~/^rolesdef_/) {
2580: my ($area,$role)=split(/=/,$_);
2581: $area=~s/\_\w\w$//;
2582: my ($trole,$tend,$tstart);
2583: if ($role=~/^cr/) {
2584: if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
2585: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2586: ($tend,$tstart)=split('_',$trest);
2587: } else {
2588: $trole=$role;
2589: }
2590: } else {
2591: ($trole,$tend,$tstart)=split(/_/,$role);
2592: }
2593: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2594: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2595: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2596: if (($area ne '') && ($trole ne '')) {
2597: my $spec=$trole.'.'.$area;
2598: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2599: if ($trole =~ /^cr\//) {
2600: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2601: } else {
2602: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2603: }
2604: }
2605: }
2606: }
2607: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles);
2608: $userroles.='user.adv='.$adv."\n".
2609: 'user.author='.$author."\n";
2610: $env{'user.adv'}=$adv;
2611: }
2612: return $userroles;
2613: }
2614:
2615: sub set_arearole {
2616: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2617: # log the associated role with the area
2618: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2619: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2620: }
2621:
2622: sub custom_roleprivs {
2623: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2624: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2625: my $homsvr=homeserver($rauthor,$rdomain);
2626: if ($hostname{$homsvr} ne '') {
2627: my ($rdummy,$roledef)=
2628: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2629: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2630: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2631: if (defined($syspriv)) {
2632: $$allroles{'cm./'}.=':'.$syspriv;
2633: $$allroles{$spec.'./'}.=':'.$syspriv;
2634: }
2635: if ($tdomain ne '') {
2636: if (defined($dompriv)) {
2637: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2638: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2639: }
2640: if (($trest ne '') && (defined($coursepriv))) {
2641: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2642: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2643: }
2644: }
2645: }
2646: }
2647: }
2648:
2649:
2650: sub standard_roleprivs {
2651: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2652: if (defined($pr{$trole.':s'})) {
2653: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2654: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2655: }
2656: if ($tdomain ne '') {
2657: if (defined($pr{$trole.':d'})) {
2658: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2659: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2660: }
2661: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2662: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2663: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2664: }
2665: }
2666: }
2667:
2668: sub set_userprivs {
2669: my ($userroles,$allroles) = @_;
2670: my $author=0;
2671: my $adv=0;
2672: foreach (keys %{$allroles}) {
2673: my %thesepriv=();
2674: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2675: foreach (split(/:/,$$allroles{$_})) {
2676: if ($_ ne '') {
2677: my ($privilege,$restrictions)=split(/&/,$_);
2678: if ($restrictions eq '') {
2679: $thesepriv{$privilege}='F';
2680: } elsif ($thesepriv{$privilege} ne 'F') {
2681: $thesepriv{$privilege}.=$restrictions;
2682: }
2683: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2684: }
2685: }
2686: my $thesestr='';
2687: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2688: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2689: }
2690: return ($author,$adv);
2691: }
2692:
2693: # --------------------------------------------------------------- get interface
2694:
2695: sub get {
2696: my ($namespace,$storearr,$udomain,$uname)=@_;
2697: my $items='';
2698: foreach (@$storearr) {
2699: $items.=escape($_).'&';
2700: }
2701: $items=~s/\&$//;
2702: if (!$udomain) { $udomain=$env{'user.domain'}; }
2703: if (!$uname) { $uname=$env{'user.name'}; }
2704: my $uhome=&homeserver($uname,$udomain);
2705:
2706: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2707: my @pairs=split(/\&/,$rep);
2708: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2709: return @pairs;
2710: }
2711: my %returnhash=();
2712: my $i=0;
2713: foreach (@$storearr) {
2714: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2715: $i++;
2716: }
2717: return %returnhash;
2718: }
2719:
2720: # --------------------------------------------------------------- del interface
2721:
2722: sub del {
2723: my ($namespace,$storearr,$udomain,$uname)=@_;
2724: my $items='';
2725: foreach (@$storearr) {
2726: $items.=escape($_).'&';
2727: }
2728: $items=~s/\&$//;
2729: if (!$udomain) { $udomain=$env{'user.domain'}; }
2730: if (!$uname) { $uname=$env{'user.name'}; }
2731: my $uhome=&homeserver($uname,$udomain);
2732:
2733: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2734: }
2735:
2736: # -------------------------------------------------------------- dump interface
2737:
2738: sub dump {
2739: my ($namespace,$udomain,$uname,$regexp)=@_;
2740: if (!$udomain) { $udomain=$env{'user.domain'}; }
2741: if (!$uname) { $uname=$env{'user.name'}; }
2742: my $uhome=&homeserver($uname,$udomain);
2743: if ($regexp) {
2744: $regexp=&escape($regexp);
2745: } else {
2746: $regexp='.';
2747: }
2748: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2749: my @pairs=split(/\&/,$rep);
2750: my %returnhash=();
2751: foreach (@pairs) {
2752: my ($key,$value)=split(/=/,$_);
2753: $returnhash{unescape($key)}=&thaw_unescape($value);
2754: }
2755: return %returnhash;
2756: }
2757:
2758: # -------------------------------------------------------------- keys interface
2759:
2760: sub getkeys {
2761: my ($namespace,$udomain,$uname)=@_;
2762: if (!$udomain) { $udomain=$env{'user.domain'}; }
2763: if (!$uname) { $uname=$env{'user.name'}; }
2764: my $uhome=&homeserver($uname,$udomain);
2765: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2766: my @keyarray=();
2767: foreach (split(/\&/,$rep)) {
2768: push (@keyarray,&unescape($_));
2769: }
2770: return @keyarray;
2771: }
2772:
2773: # --------------------------------------------------------------- currentdump
2774: sub currentdump {
2775: my ($courseid,$sdom,$sname)=@_;
2776: $courseid = $env{'request.course.id'} if (! defined($courseid));
2777: $sdom = $env{'user.domain'} if (! defined($sdom));
2778: $sname = $env{'user.name'} if (! defined($sname));
2779: my $uhome = &homeserver($sname,$sdom);
2780: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2781: return if ($rep =~ /^(error:|no_such_host)/);
2782: #
2783: my %returnhash=();
2784: #
2785: if ($rep eq "unknown_cmd") {
2786: # an old lond will not know currentdump
2787: # Do a dump and make it look like a currentdump
2788: my @tmp = &dump($courseid,$sdom,$sname,'.');
2789: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2790: my %hash = @tmp;
2791: @tmp=();
2792: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2793: } else {
2794: my @pairs=split(/\&/,$rep);
2795: foreach (@pairs) {
2796: my ($key,$value)=split(/=/,$_);
2797: my ($symb,$param) = split(/:/,$key);
2798: $returnhash{&unescape($symb)}->{&unescape($param)} =
2799: &thaw_unescape($value);
2800: }
2801: }
2802: return %returnhash;
2803: }
2804:
2805: sub convert_dump_to_currentdump{
2806: my %hash = %{shift()};
2807: my %returnhash;
2808: # Code ripped from lond, essentially. The only difference
2809: # here is the unescaping done by lonnet::dump(). Conceivably
2810: # we might run in to problems with parameter names =~ /^v\./
2811: while (my ($key,$value) = each(%hash)) {
2812: my ($v,$symb,$param) = split(/:/,$key);
2813: next if ($v eq 'version' || $symb eq 'keys');
2814: next if (exists($returnhash{$symb}) &&
2815: exists($returnhash{$symb}->{$param}) &&
2816: $returnhash{$symb}->{'v.'.$param} > $v);
2817: $returnhash{$symb}->{$param}=$value;
2818: $returnhash{$symb}->{'v.'.$param}=$v;
2819: }
2820: #
2821: # Remove all of the keys in the hashes which keep track of
2822: # the version of the parameter.
2823: while (my ($symb,$param_hash) = each(%returnhash)) {
2824: # use a foreach because we are going to delete from the hash.
2825: foreach my $key (keys(%$param_hash)) {
2826: delete($param_hash->{$key}) if ($key =~ /^v\./);
2827: }
2828: }
2829: return \%returnhash;
2830: }
2831:
2832: # ------------------------------------------------------ critical inc interface
2833:
2834: sub cinc {
2835: return &inc(@_,'critical');
2836: }
2837:
2838: # --------------------------------------------------------------- inc interface
2839:
2840: sub inc {
2841: my ($namespace,$store,$udomain,$uname,$critical) = @_;
2842: if (!$udomain) { $udomain=$env{'user.domain'}; }
2843: if (!$uname) { $uname=$env{'user.name'}; }
2844: my $uhome=&homeserver($uname,$udomain);
2845: my $items='';
2846: if (! ref($store)) {
2847: # got a single value, so use that instead
2848: $items = &escape($store).'=&';
2849: } elsif (ref($store) eq 'SCALAR') {
2850: $items = &escape($$store).'=&';
2851: } elsif (ref($store) eq 'ARRAY') {
2852: $items = join('=&',map {&escape($_);} @{$store});
2853: } elsif (ref($store) eq 'HASH') {
2854: while (my($key,$value) = each(%{$store})) {
2855: $items.= &escape($key).'='.&escape($value).'&';
2856: }
2857: }
2858: $items=~s/\&$//;
2859: if ($critical) {
2860: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
2861: } else {
2862: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2863: }
2864: }
2865:
2866: # --------------------------------------------------------------- put interface
2867:
2868: sub put {
2869: my ($namespace,$storehash,$udomain,$uname)=@_;
2870: if (!$udomain) { $udomain=$env{'user.domain'}; }
2871: if (!$uname) { $uname=$env{'user.name'}; }
2872: my $uhome=&homeserver($uname,$udomain);
2873: my $items='';
2874: foreach (keys %$storehash) {
2875: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2876: }
2877: $items=~s/\&$//;
2878: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2879: }
2880:
2881: # ------------------------------------------------------------ newput interface
2882:
2883: sub newput {
2884: my ($namespace,$storehash,$udomain,$uname)=@_;
2885: if (!$udomain) { $udomain=$env{'user.domain'}; }
2886: if (!$uname) { $uname=$env{'user.name'}; }
2887: my $uhome=&homeserver($uname,$udomain);
2888: my $items='';
2889: foreach my $key (keys(%$storehash)) {
2890: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2891: }
2892: $items=~s/\&$//;
2893: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
2894: }
2895:
2896: # --------------------------------------------------------- putstore interface
2897:
2898: sub putstore {
2899: my ($namespace,$storehash,$udomain,$uname)=@_;
2900: if (!$udomain) { $udomain=$env{'user.domain'}; }
2901: if (!$uname) { $uname=$env{'user.name'}; }
2902: my $uhome=&homeserver($uname,$udomain);
2903: my $items='';
2904: my %allitems = ();
2905: foreach (keys %$storehash) {
2906: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2907: my $key = $1.':keys:'.$2;
2908: $allitems{$key} .= $3.':';
2909: }
2910: $items.=$_.'='.&freeze_escape($$storehash{$_}).'&';
2911: }
2912: foreach (keys %allitems) {
2913: $allitems{$_} =~ s/\:$//;
2914: $items.= $_.'='.$allitems{$_}.'&';
2915: }
2916: $items=~s/\&$//;
2917: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2918: }
2919:
2920: # ------------------------------------------------------ critical put interface
2921:
2922: sub cput {
2923: my ($namespace,$storehash,$udomain,$uname)=@_;
2924: if (!$udomain) { $udomain=$env{'user.domain'}; }
2925: if (!$uname) { $uname=$env{'user.name'}; }
2926: my $uhome=&homeserver($uname,$udomain);
2927: my $items='';
2928: foreach (keys %$storehash) {
2929: $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2930: }
2931: $items=~s/\&$//;
2932: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2933: }
2934:
2935: # -------------------------------------------------------------- eget interface
2936:
2937: sub eget {
2938: my ($namespace,$storearr,$udomain,$uname)=@_;
2939: my $items='';
2940: foreach (@$storearr) {
2941: $items.=escape($_).'&';
2942: }
2943: $items=~s/\&$//;
2944: if (!$udomain) { $udomain=$env{'user.domain'}; }
2945: if (!$uname) { $uname=$env{'user.name'}; }
2946: my $uhome=&homeserver($uname,$udomain);
2947: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2948: my @pairs=split(/\&/,$rep);
2949: my %returnhash=();
2950: my $i=0;
2951: foreach (@$storearr) {
2952: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2953: $i++;
2954: }
2955: return %returnhash;
2956: }
2957:
2958: # ---------------------------------------------- Custom access rule evaluation
2959:
2960: sub customaccess {
2961: my ($priv,$uri)=@_;
2962: my ($urole,$urealm)=split(/\./,$env{'request.role'});
2963: $urealm=~s/^\W//;
2964: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2965: my $access=0;
2966: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2967: my ($effect,$realm,$role)=split(/\:/,$_);
2968: if ($role) {
2969: if ($role ne $urole) { next; }
2970: }
2971: foreach (split(/\s*\,\s*/,$realm)) {
2972: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2973: if ($tdom) {
2974: if ($tdom ne $udom) { next; }
2975: }
2976: if ($tcrs) {
2977: if ($tcrs ne $ucrs) { next; }
2978: }
2979: if ($tsec) {
2980: if ($tsec ne $usec) { next; }
2981: }
2982: $access=($effect eq 'allow');
2983: last;
2984: }
2985: if ($realm eq '' && $role eq '') {
2986: $access=($effect eq 'allow');
2987: }
2988: }
2989: return $access;
2990: }
2991:
2992: # ------------------------------------------------- Check for a user privilege
2993:
2994: sub allowed {
2995: my ($priv,$uri,$symb)=@_;
2996: $uri=&deversion($uri);
2997: my $orguri=$uri;
2998: $uri=&declutter($uri);
2999:
3000:
3001:
3002: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3003: # Free bre access to adm and meta resources
3004: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
3005: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
3006: return 'F';
3007: }
3008:
3009: # Free bre access to user's own portfolio contents
3010: my ($space,$domain,$name,$dir)=split('/',$uri);
3011: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3012: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
3013: return 'F';
3014: }
3015:
3016: # Free bre to public access
3017:
3018: if ($priv eq 'bre') {
3019: my $copyright=&metadata($uri,'copyright');
3020: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3021: return 'F';
3022: }
3023: if ($copyright eq 'priv') {
3024: $uri=~/([^\/]+)\/([^\/]+)\//;
3025: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3026: return '';
3027: }
3028: }
3029: if ($copyright eq 'domain') {
3030: $uri=~/([^\/]+)\/([^\/]+)\//;
3031: unless (($env{'user.domain'} eq $1) ||
3032: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3033: return '';
3034: }
3035: }
3036: if ($env{'request.role'}=~ /li\.\//) {
3037: # Library role, so allow browsing of resources in this domain.
3038: return 'F';
3039: }
3040: if ($copyright eq 'custom') {
3041: unless (&customaccess($priv,$uri)) { return ''; }
3042: }
3043: }
3044: # Domain coordinator is trying to create a course
3045: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3046: # uri is the requested domain in this case.
3047: # comparison to 'request.role.domain' shows if the user has selected
3048: # a role of dc for the domain in question.
3049: return 'F' if ($uri eq $env{'request.role.domain'});
3050: }
3051:
3052: my $thisallowed='';
3053: my $statecond=0;
3054: my $courseprivid='';
3055:
3056: # Course
3057:
3058: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3059: $thisallowed.=$1;
3060: }
3061:
3062: # Domain
3063:
3064: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3065: =~/\Q$priv\E\&([^\:]*)/) {
3066: $thisallowed.=$1;
3067: }
3068:
3069: # Course: uri itself is a course
3070: my $courseuri=$uri;
3071: $courseuri=~s/\_(\d)/\/$1/;
3072: $courseuri=~s/^([^\/])/\/$1/;
3073:
3074: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3075: =~/\Q$priv\E\&([^\:]*)/) {
3076: $thisallowed.=$1;
3077: }
3078:
3079: # URI is an uploaded document for this course
3080: # not allowing 'edit' access (editupload) to uploaded course docs
3081: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3082: my $refuri=$env{'httpref.'.$orguri};
3083: if ($refuri) {
3084: if ($refuri =~ m|^/adm/|) {
3085: $thisallowed='F';
3086: }
3087: }
3088: }
3089:
3090: # Full access at system, domain or course-wide level? Exit.
3091:
3092: if ($thisallowed=~/F/) {
3093: return 'F';
3094: }
3095:
3096: # If this is generating or modifying users, exit with special codes
3097:
3098: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3099: if (($priv eq 'cca') || ($priv eq 'caa')) {
3100: my ($audom,$auname)=split('/',$uri);
3101: # no author name given, so this just checks on the general right to make a co-author in this domain
3102: unless ($auname) { return $thisallowed; }
3103: # an author name is given, so we are about to actually make a co-author for a certain account
3104: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3105: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3106: ($audom ne $env{'request.role.domain'}))) { return ''; }
3107: }
3108: return $thisallowed;
3109: }
3110: #
3111: # Gathered so far: system, domain and course wide privileges
3112: #
3113: # Course: See if uri or referer is an individual resource that is part of
3114: # the course
3115:
3116: if ($env{'request.course.id'}) {
3117:
3118: $courseprivid=$env{'request.course.id'};
3119: if ($env{'request.course.sec'}) {
3120: $courseprivid.='/'.$env{'request.course.sec'};
3121: }
3122: $courseprivid=~s/\_/\//;
3123: my $checkreferer=1;
3124: my ($match,$cond)=&is_on_map($uri);
3125: if ($match) {
3126: $statecond=$cond;
3127: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3128: =~/\Q$priv\E\&([^\:]*)/) {
3129: $thisallowed.=$1;
3130: $checkreferer=0;
3131: }
3132: }
3133:
3134: if ($checkreferer) {
3135: my $refuri=$env{'httpref.'.$orguri};
3136: unless ($refuri) {
3137: foreach (keys %env) {
3138: if ($_=~/^httpref\..*\*/) {
3139: my $pattern=$_;
3140: $pattern=~s/^httpref\.\/res\///;
3141: $pattern=~s/\*/\[\^\/\]\+/g;
3142: $pattern=~s/\//\\\//g;
3143: if ($orguri=~/$pattern/) {
3144: $refuri=$env{$_};
3145: }
3146: }
3147: }
3148: }
3149:
3150: if ($refuri) {
3151: $refuri=&declutter($refuri);
3152: my ($match,$cond)=&is_on_map($refuri);
3153: if ($match) {
3154: my $refstatecond=$cond;
3155: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3156: =~/\Q$priv\E\&([^\:]*)/) {
3157: $thisallowed.=$1;
3158: $uri=$refuri;
3159: $statecond=$refstatecond;
3160: }
3161: }
3162: }
3163: }
3164: }
3165:
3166: #
3167: # Gathered now: all privileges that could apply, and condition number
3168: #
3169: #
3170: # Full or no access?
3171: #
3172:
3173: if ($thisallowed=~/F/) {
3174: return 'F';
3175: }
3176:
3177: unless ($thisallowed) {
3178: return '';
3179: }
3180:
3181: # Restrictions exist, deal with them
3182: #
3183: # C:according to course preferences
3184: # R:according to resource settings
3185: # L:unless locked
3186: # X:according to user session state
3187: #
3188:
3189: # Possibly locked functionality, check all courses
3190: # Locks might take effect only after 10 minutes cache expiration for other
3191: # courses, and 2 minutes for current course
3192:
3193: my $envkey;
3194: if ($thisallowed=~/L/) {
3195: foreach $envkey (keys %env) {
3196: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3197: my $courseid=$2;
3198: my $roleid=$1.'.'.$2;
3199: $courseid=~s/^\///;
3200: my $expiretime=600;
3201: if ($env{'request.role'} eq $roleid) {
3202: $expiretime=120;
3203: }
3204: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3205: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3206: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3207: &coursedescription($courseid);
3208: }
3209: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3210: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3211: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3212: &log($env{'user.domain'},$env{'user.name'},
3213: $env{'user.home'},
3214: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3215: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3216: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3217: return '';
3218: }
3219: }
3220: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3221: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3222: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3223: &log($env{'user.domain'},$env{'user.name'},
3224: $env{'user.home'},
3225: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3226: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3227: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3228: return '';
3229: }
3230: }
3231: }
3232: }
3233: }
3234:
3235: #
3236: # Rest of the restrictions depend on selected course
3237: #
3238:
3239: unless ($env{'request.course.id'}) {
3240: return '1';
3241: }
3242:
3243: #
3244: # Now user is definitely in a course
3245: #
3246:
3247:
3248: # Course preferences
3249:
3250: if ($thisallowed=~/C/) {
3251: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3252: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
3253: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
3254: =~/\Q$rolecode\E/) {
3255: &log($env{'user.domain'},$env{'user.name'},$env{'user.host'},
3256: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3257: $env{'request.course.id'});
3258: return '';
3259: }
3260:
3261: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
3262: =~/\Q$unamedom\E/) {
3263: &log($env{'user.domain'},$env{'user.name'},$env{'user.host'},
3264: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3265: $env{'request.course.id'});
3266: return '';
3267: }
3268: }
3269:
3270: # Resource preferences
3271:
3272: if ($thisallowed=~/R/) {
3273: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3274: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3275: &log($env{'user.domain'},$env{'user.name'},$env{'user.host'},
3276: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3277: return '';
3278: }
3279: }
3280:
3281: # Restricted by state or randomout?
3282:
3283: if ($thisallowed=~/X/) {
3284: if ($env{'acc.randomout'}) {
3285: if (!$symb) { $symb=&symbread($uri,1); }
3286: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3287: return '';
3288: }
3289: }
3290: if (&condval($statecond)) {
3291: return '2';
3292: } else {
3293: return '';
3294: }
3295: }
3296:
3297: return 'F';
3298: }
3299:
3300: # --------------------------------------------------- Is a resource on the map?
3301:
3302: sub is_on_map {
3303: my $uri=&deversion(&declutter(shift));
3304: my @uriparts=split(/\//,$uri);
3305: my $filename=$uriparts[$#uriparts];
3306: my $pathname=$uri;
3307: $pathname=~s|/\Q$filename\E$||;
3308: $pathname=~s/^adm\/wrapper\///;
3309: #Trying to find the conditional for the file
3310: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3311: /\&\Q$filename\E\:([\d\|]+)\&/);
3312: if ($match) {
3313: return (1,$1);
3314: } else {
3315: return (0,0);
3316: }
3317: }
3318:
3319: # --------------------------------------------------------- Get symb from alias
3320:
3321: sub get_symb_from_alias {
3322: my $symb=shift;
3323: my ($map,$resid,$url)=&decode_symb($symb);
3324: # Already is a symb
3325: if ($url) { return $symb; }
3326: # Must be an alias
3327: my $aliassymb='';
3328: my %bighash;
3329: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3330: &GDBM_READER(),0640)) {
3331: my $rid=$bighash{'mapalias_'.$symb};
3332: if ($rid) {
3333: my ($mapid,$resid)=split(/\./,$rid);
3334: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3335: $resid,$bighash{'src_'.$rid});
3336: }
3337: untie %bighash;
3338: }
3339: return $aliassymb;
3340: }
3341:
3342: # ----------------------------------------------------------------- Define Role
3343:
3344: sub definerole {
3345: if (allowed('mcr','/')) {
3346: my ($rolename,$sysrole,$domrole,$courole)=@_;
3347: foreach (split(':',$sysrole)) {
3348: my ($crole,$cqual)=split(/\&/,$_);
3349: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3350: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3351: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3352: return "refused:s:$crole&$cqual";
3353: }
3354: }
3355: }
3356: foreach (split(':',$domrole)) {
3357: my ($crole,$cqual)=split(/\&/,$_);
3358: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3359: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3360: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3361: return "refused:d:$crole&$cqual";
3362: }
3363: }
3364: }
3365: foreach (split(':',$courole)) {
3366: my ($crole,$cqual)=split(/\&/,$_);
3367: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3368: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3369: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3370: return "refused:c:$crole&$cqual";
3371: }
3372: }
3373: }
3374: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3375: "$env{'user.domain'}:$env{'user.name'}:".
3376: "rolesdef_$rolename=".
3377: escape($sysrole.'_'.$domrole.'_'.$courole);
3378: return reply($command,$env{'user.home'});
3379: } else {
3380: return 'refused';
3381: }
3382: }
3383:
3384: # ---------------- Make a metadata query against the network of library servers
3385:
3386: sub metadata_query {
3387: my ($query,$custom,$customshow,$server_array)=@_;
3388: my %rhash;
3389: my @server_list = (defined($server_array) ? @$server_array
3390: : keys(%libserv) );
3391: for my $server (@server_list) {
3392: unless ($custom or $customshow) {
3393: my $reply=&reply("querysend:".&escape($query),$server);
3394: $rhash{$server}=$reply;
3395: }
3396: else {
3397: my $reply=&reply("querysend:".&escape($query).':'.
3398: &escape($custom).':'.&escape($customshow),
3399: $server);
3400: $rhash{$server}=$reply;
3401: }
3402: }
3403: return \%rhash;
3404: }
3405:
3406: # ----------------------------------------- Send log queries and wait for reply
3407:
3408: sub log_query {
3409: my ($uname,$udom,$query,%filters)=@_;
3410: my $uhome=&homeserver($uname,$udom);
3411: if ($uhome eq 'no_host') { return 'error: no_host'; }
3412: my $uhost=$hostname{$uhome};
3413: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3414: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3415: $uhome);
3416: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3417: return get_query_reply($queryid);
3418: }
3419:
3420: # ------- Request retrieval of institutional classlists for course(s)
3421:
3422: sub fetch_enrollment_query {
3423: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3424: my $homeserver;
3425: my $maxtries = 1;
3426: if ($context eq 'automated') {
3427: $homeserver = $perlvar{'lonHostID'};
3428: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3429: } else {
3430: $homeserver = &homeserver($cnum,$dom);
3431: }
3432: my $host=$hostname{$homeserver};
3433: my $cmd = '';
3434: foreach (keys %{$affiliatesref}) {
3435: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3436: }
3437: $cmd =~ s/%%$//;
3438: $cmd = &escape($cmd);
3439: my $query = 'fetchenrollment';
3440: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3441: unless ($queryid=~/^\Q$host\E\_/) {
3442: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3443: return 'error: '.$queryid;
3444: }
3445: my $reply = &get_query_reply($queryid);
3446: my $tries = 1;
3447: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3448: $reply = &get_query_reply($queryid);
3449: $tries ++;
3450: }
3451: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3452: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3453: } else {
3454: my @responses = split/:/,$reply;
3455: if ($homeserver eq $perlvar{'lonHostID'}) {
3456: foreach (@responses) {
3457: my ($key,$value) = split/=/,$_;
3458: $$replyref{$key} = $value;
3459: }
3460: } else {
3461: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3462: foreach (@responses) {
3463: my ($key,$value) = split/=/,$_;
3464: $$replyref{$key} = $value;
3465: if ($value > 0) {
3466: foreach (@{$$affiliatesref{$key}}) {
3467: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3468: my $destname = $pathname.'/'.$filename;
3469: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3470: if ($xml_classlist =~ /^error/) {
3471: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3472: } else {
3473: if ( open(FILE,">$destname") ) {
3474: print FILE &unescape($xml_classlist);
3475: close(FILE);
3476: } else {
3477: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3478: }
3479: }
3480: }
3481: }
3482: }
3483: }
3484: return 'ok';
3485: }
3486: return 'error';
3487: }
3488:
3489: sub get_query_reply {
3490: my $queryid=shift;
3491: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3492: my $reply='';
3493: for (1..100) {
3494: sleep 2;
3495: if (-e $replyfile.'.end') {
3496: if (open(my $fh,$replyfile)) {
3497: $reply.=<$fh>;
3498: close($fh);
3499: } else { return 'error: reply_file_error'; }
3500: return &unescape($reply);
3501: }
3502: }
3503: return 'timeout:'.$queryid;
3504: }
3505:
3506: sub courselog_query {
3507: #
3508: # possible filters:
3509: # url: url or symb
3510: # username
3511: # domain
3512: # action: view, submit, grade
3513: # start: timestamp
3514: # end: timestamp
3515: #
3516: my (%filters)=@_;
3517: unless ($env{'request.course.id'}) { return 'no_course'; }
3518: if ($filters{'url'}) {
3519: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3520: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3521: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3522: }
3523: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
3524: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
3525: return &log_query($cname,$cdom,'courselog',%filters);
3526: }
3527:
3528: sub userlog_query {
3529: my ($uname,$udom,%filters)=@_;
3530: return &log_query($uname,$udom,'userlog',%filters);
3531: }
3532:
3533: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3534:
3535: sub auto_run {
3536: my ($cnum,$cdom) = @_;
3537: my $homeserver = &homeserver($cnum,$cdom);
3538: my $response = &reply('autorun:'.$cdom,$homeserver);
3539: return $response;
3540: }
3541:
3542: sub auto_get_sections {
3543: my ($cnum,$cdom,$inst_coursecode) = @_;
3544: my $homeserver = &homeserver($cnum,$cdom);
3545: my @secs = ();
3546: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3547: unless ($response eq 'refused') {
3548: @secs = split/:/,$response;
3549: }
3550: return @secs;
3551: }
3552:
3553: sub auto_new_course {
3554: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3555: my $homeserver = &homeserver($cnum,$cdom);
3556: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3557: return $response;
3558: }
3559:
3560: sub auto_validate_courseID {
3561: my ($cnum,$cdom,$inst_course_id) = @_;
3562: my $homeserver = &homeserver($cnum,$cdom);
3563: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3564: return $response;
3565: }
3566:
3567: sub auto_create_password {
3568: my ($cnum,$cdom,$authparam) = @_;
3569: my $homeserver = &homeserver($cnum,$cdom);
3570: my $create_passwd = 0;
3571: my $authchk = '';
3572: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3573: if ($response eq 'refused') {
3574: $authchk = 'refused';
3575: } else {
3576: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3577: }
3578: return ($authparam,$create_passwd,$authchk);
3579: }
3580:
3581: sub auto_instcode_format {
3582: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3583: my $courses = '';
3584: my $homeserver;
3585: if ($caller eq 'global') {
3586: foreach my $tryserver (keys %libserv) {
3587: if ($hostdom{$tryserver} eq $codedom) {
3588: $homeserver = $tryserver;
3589: last;
3590: }
3591: }
3592: if (($env{'user.name'}) && ($env{'user.domain'} eq $codedom)) {
3593: $homeserver = &homeserver($env{'user.name'},$codedom);
3594: }
3595: } else {
3596: $homeserver = &homeserver($caller,$codedom);
3597: }
3598: foreach (keys %{$instcodes}) {
3599: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3600: }
3601: chop($courses);
3602: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3603: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3604: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3605: %{$codes} = &str2hash($codes_str);
3606: @{$codetitles} = &str2array($codetitles_str);
3607: %{$cat_titles} = &str2hash($cat_titles_str);
3608: %{$cat_order} = &str2hash($cat_order_str);
3609: return 'ok';
3610: }
3611: return $response;
3612: }
3613:
3614: # ------------------------------------------------------------------ Plain Text
3615:
3616: sub plaintext {
3617: my $short=shift;
3618: return &mt($prp{$short});
3619: }
3620:
3621: # ----------------------------------------------------------------- Assign Role
3622:
3623: sub assignrole {
3624: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3625: my $mrole;
3626: if ($role =~ /^cr\//) {
3627: my $cwosec=$url;
3628: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3629: unless (&allowed('ccr',$cwosec)) {
3630: &logthis('Refused custom assignrole: '.
3631: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3632: $env{'user.name'}.' at '.$env{'user.domain'});
3633: return 'refused';
3634: }
3635: $mrole='cr';
3636: } else {
3637: my $cwosec=$url;
3638: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3639: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3640: &logthis('Refused assignrole: '.
3641: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3642: $env{'user.name'}.' at '.$env{'user.domain'});
3643: return 'refused';
3644: }
3645: $mrole=$role;
3646: }
3647: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3648: "$udom:$uname:$url".'_'."$mrole=$role";
3649: if ($end) { $command.='_'.$end; }
3650: if ($start) {
3651: if ($end) {
3652: $command.='_'.$start;
3653: } else {
3654: $command.='_0_'.$start;
3655: }
3656: }
3657: # actually delete
3658: if ($deleteflag) {
3659: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3660: # modify command to delete the role
3661: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
3662: "$udom:$uname:$url".'_'."$mrole";
3663: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
3664: # set start and finish to negative values for userrolelog
3665: $start=-1;
3666: $end=-1;
3667: }
3668: }
3669: # send command
3670: my $answer=&reply($command,&homeserver($uname,$udom));
3671: # log new user role if status is ok
3672: if ($answer eq 'ok') {
3673: &userrolelog($role,$uname,$udom,$url,$start,$end);
3674: }
3675: return $answer;
3676: }
3677:
3678: # -------------------------------------------------- Modify user authentication
3679: # Overrides without validation
3680:
3681: sub modifyuserauth {
3682: my ($udom,$uname,$umode,$upass)=@_;
3683: my $uhome=&homeserver($uname,$udom);
3684: unless (&allowed('mau',$udom)) { return 'refused'; }
3685: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3686: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
3687: ' in domain '.$env{'request.role.domain'});
3688: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3689: &escape($upass),$uhome);
3690: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
3691: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3692: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3693: &log($udom,,$uname,$uhome,
3694: 'Authentication changed by '.$env{'user.domain'}.', '.
3695: $env{'user.name'}.', '.$umode.
3696: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3697: unless ($reply eq 'ok') {
3698: &logthis('Authentication mode error: '.$reply);
3699: return 'error: '.$reply;
3700: }
3701: return 'ok';
3702: }
3703:
3704: # --------------------------------------------------------------- Modify a user
3705:
3706: sub modifyuser {
3707: my ($udom, $uname, $uid,
3708: $umode, $upass, $first,
3709: $middle, $last, $gene,
3710: $forceid, $desiredhome, $email)=@_;
3711: $udom=~s/\W//g;
3712: $uname=~s/\W//g;
3713: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3714: $umode.', '.$first.', '.$middle.', '.
3715: $last.', '.$gene.'(forceid: '.$forceid.')'.
3716: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3717: ' desiredhome not specified').
3718: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
3719: ' in domain '.$env{'request.role.domain'});
3720: my $uhome=&homeserver($uname,$udom,'true');
3721: # ----------------------------------------------------------------- Create User
3722: if (($uhome eq 'no_host') &&
3723: (($umode && $upass) || ($umode eq 'localauth'))) {
3724: my $unhome='';
3725: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3726: $unhome = $desiredhome;
3727: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
3728: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
3729: } else { # load balancing routine for determining $unhome
3730: my $tryserver;
3731: my $loadm=10000000;
3732: foreach $tryserver (keys %libserv) {
3733: if ($hostdom{$tryserver} eq $udom) {
3734: my $answer=reply('load',$tryserver);
3735: if (($answer=~/\d+/) && ($answer<$loadm)) {
3736: $loadm=$answer;
3737: $unhome=$tryserver;
3738: }
3739: }
3740: }
3741: }
3742: if (($unhome eq '') || ($unhome eq 'no_host')) {
3743: return 'error: unable to find a home server for '.$uname.
3744: ' in domain '.$udom;
3745: }
3746: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3747: &escape($upass),$unhome);
3748: unless ($reply eq 'ok') {
3749: return 'error: '.$reply;
3750: }
3751: $uhome=&homeserver($uname,$udom,'true');
3752: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3753: return 'error: unable verify users home machine.';
3754: }
3755: } # End of creation of new user
3756: # ---------------------------------------------------------------------- Add ID
3757: if ($uid) {
3758: $uid=~tr/A-Z/a-z/;
3759: my %uidhash=&idrget($udom,$uname);
3760: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3761: && (!$forceid)) {
3762: unless ($uid eq $uidhash{$uname}) {
3763: return 'error: user id "'.$uid.'" does not match '.
3764: 'current user id "'.$uidhash{$uname}.'".';
3765: }
3766: } else {
3767: &idput($udom,($uname => $uid));
3768: }
3769: }
3770: # -------------------------------------------------------------- Add names, etc
3771: my @tmp=&get('environment',
3772: ['firstname','middlename','lastname','generation'],
3773: $udom,$uname);
3774: my %names;
3775: if ($tmp[0] =~ m/^error:.*/) {
3776: %names=();
3777: } else {
3778: %names = @tmp;
3779: }
3780: #
3781: # Make sure to not trash student environment if instructor does not bother
3782: # to supply name and email information
3783: #
3784: if ($first) { $names{'firstname'} = $first; }
3785: if (defined($middle)) { $names{'middlename'} = $middle; }
3786: if ($last) { $names{'lastname'} = $last; }
3787: if (defined($gene)) { $names{'generation'} = $gene; }
3788: if ($email) {
3789: $email=~s/[^\w\@\.\-\,]//gs;
3790: if ($email=~/\@/) { $names{'notification'} = $email;
3791: $names{'critnotification'} = $email;
3792: $names{'permanentemail'} = $email; }
3793: }
3794: my $reply = &put('environment', \%names, $udom,$uname);
3795: if ($reply ne 'ok') { return 'error: '.$reply; }
3796: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3797: $umode.', '.$first.', '.$middle.', '.
3798: $last.', '.$gene.' by '.
3799: $env{'user.name'}.' at '.$env{'user.domain'});
3800: return 'ok';
3801: }
3802:
3803: # -------------------------------------------------------------- Modify student
3804:
3805: sub modifystudent {
3806: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3807: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
3808: if (!$cid) {
3809: unless ($cid=$env{'request.course.id'}) {
3810: return 'not_in_class';
3811: }
3812: }
3813: # --------------------------------------------------------------- Make the user
3814: my $reply=&modifyuser
3815: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3816: $desiredhome,$email);
3817: unless ($reply eq 'ok') { return $reply; }
3818: # This will cause &modify_student_enrollment to get the uid from the
3819: # students environment
3820: $uid = undef if (!$forceid);
3821: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3822: $gene,$usec,$end,$start,$type,$locktype,$cid);
3823: return $reply;
3824: }
3825:
3826: sub modify_student_enrollment {
3827: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
3828: my ($cdom,$cnum,$chome);
3829: if (!$cid) {
3830: unless ($cid=$env{'request.course.id'}) {
3831: return 'not_in_class';
3832: }
3833: $cdom=$env{'course.'.$cid.'.domain'};
3834: $cnum=$env{'course.'.$cid.'.num'};
3835: } else {
3836: ($cdom,$cnum)=split(/_/,$cid);
3837: }
3838: $chome=$env{'course.'.$cid.'.home'};
3839: if (!$chome) {
3840: $chome=&homeserver($cnum,$cdom);
3841: }
3842: if (!$chome) { return 'unknown_course'; }
3843: # Make sure the user exists
3844: my $uhome=&homeserver($uname,$udom);
3845: if (($uhome eq '') || ($uhome eq 'no_host')) {
3846: return 'error: no such user';
3847: }
3848: # Get student data if we were not given enough information
3849: if (!defined($first) || $first eq '' ||
3850: !defined($last) || $last eq '' ||
3851: !defined($uid) || $uid eq '' ||
3852: !defined($middle) || $middle eq '' ||
3853: !defined($gene) || $gene eq '') {
3854: # They did not supply us with enough data to enroll the student, so
3855: # we need to pick up more information.
3856: my %tmp = &get('environment',
3857: ['firstname','middlename','lastname', 'generation','id']
3858: ,$udom,$uname);
3859:
3860: #foreach (keys(%tmp)) {
3861: # &logthis("key $_ = ".$tmp{$_});
3862: #}
3863: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3864: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3865: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3866: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3867: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3868: }
3869: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
3870: my $reply=cput('classlist',
3871: {"$uname:$udom" =>
3872: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
3873: $cdom,$cnum);
3874: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3875: return 'error: '.$reply;
3876: } else {
3877: &devalidate_getsection_cache($udom,$uname,$cid);
3878: }
3879: # Add student role to user
3880: my $uurl='/'.$cid;
3881: $uurl=~s/\_/\//g;
3882: if ($usec) {
3883: $uurl.='/'.$usec;
3884: }
3885: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3886: }
3887:
3888: sub format_name {
3889: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
3890: my $name;
3891: if ($first ne 'lastname') {
3892: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
3893: } else {
3894: if ($lastname=~/\S/) {
3895: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
3896: $name=~s/\s+,/,/;
3897: } else {
3898: $name.= $firstname.' '.$middlename.' '.$generation;
3899: }
3900: }
3901: $name=~s/^\s+//;
3902: $name=~s/\s+$//;
3903: $name=~s/\s+/ /g;
3904: return $name;
3905: }
3906:
3907: # ------------------------------------------------- Write to course preferences
3908:
3909: sub writecoursepref {
3910: my ($courseid,%prefs)=@_;
3911: $courseid=~s/^\///;
3912: $courseid=~s/\_/\//g;
3913: my ($cdomain,$cnum)=split(/\//,$courseid);
3914: my $chome=homeserver($cnum,$cdomain);
3915: if (($chome eq '') || ($chome eq 'no_host')) {
3916: return 'error: no such course';
3917: }
3918: my $cstring='';
3919: foreach (keys %prefs) {
3920: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3921: }
3922: $cstring=~s/\&$//;
3923: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3924: }
3925:
3926: # ---------------------------------------------------------- Make/modify course
3927:
3928: sub createcourse {
3929: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
3930: $url=&declutter($url);
3931: my $cid='';
3932: unless (&allowed('ccc',$udom)) {
3933: return 'refused';
3934: }
3935: # ------------------------------------------------------------------- Create ID
3936: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3937: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3938: # ----------------------------------------------- Make sure that does not exist
3939: my $uhome=&homeserver($uname,$udom,'true');
3940: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3941: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3942: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3943: $uhome=&homeserver($uname,$udom,'true');
3944: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3945: return 'error: unable to generate unique course-ID';
3946: }
3947: }
3948: # ------------------------------------------------ Check supplied server name
3949: $course_server = $env{'user.homeserver'} if (! defined($course_server));
3950: if (! exists($libserv{$course_server})) {
3951: return 'error:bad server name '.$course_server;
3952: }
3953: # ------------------------------------------------------------- Make the course
3954: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3955: $course_server);
3956: unless ($reply eq 'ok') { return 'error: '.$reply; }
3957: $uhome=&homeserver($uname,$udom,'true');
3958: if (($uhome eq '') || ($uhome eq 'no_host')) {
3959: return 'error: no such course';
3960: }
3961: # ----------------------------------------------------------------- Course made
3962: # log existence
3963: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
3964: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
3965: &flushcourselogs();
3966: # set toplevel url
3967: my $topurl=$url;
3968: unless ($nonstandard) {
3969: # ------------------------------------------ For standard courses, make top url
3970: my $mapurl=&clutter($url);
3971: if ($mapurl eq '/res/') { $mapurl=''; }
3972: $env{'form.initmap'}=(<<ENDINITMAP);
3973: <map>
3974: <resource id="1" type="start"></resource>
3975: <resource id="2" src="$mapurl"></resource>
3976: <resource id="3" type="finish"></resource>
3977: <link index="1" from="1" to="2"></link>
3978: <link index="2" from="2" to="3"></link>
3979: </map>
3980: ENDINITMAP
3981: $topurl=&declutter(
3982: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
3983: );
3984: }
3985: # ----------------------------------------------------------- Write preferences
3986: &writecoursepref($udom.'_'.$uname,
3987: ('description' => $description,
3988: 'url' => $topurl));
3989: return '/'.$udom.'/'.$uname;
3990: }
3991:
3992: # ---------------------------------------------------------- Assign Custom Role
3993:
3994: sub assigncustomrole {
3995: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3996: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3997: $end,$start,$deleteflag);
3998: }
3999:
4000: # ----------------------------------------------------------------- Revoke Role
4001:
4002: sub revokerole {
4003: my ($udom,$uname,$url,$role,$deleteflag)=@_;
4004: my $now=time;
4005: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
4006: }
4007:
4008: # ---------------------------------------------------------- Revoke Custom Role
4009:
4010: sub revokecustomrole {
4011: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
4012: my $now=time;
4013: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
4014: $deleteflag);
4015: }
4016:
4017: # ------------------------------------------------------------ Disk usage
4018: sub diskusage {
4019: my ($udom,$uname,$directoryRoot)=@_;
4020: $directoryRoot =~ s/\/$//;
4021: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
4022: return $listing;
4023: }
4024:
4025: sub is_locked {
4026: my ($file_name, $domain, $user) = @_;
4027: my @check;
4028: my $is_locked;
4029: push @check, $file_name;
4030: my %locked = &get('file_permissions',\@check,
4031: $env{'user.domain'},$env{'user.name'});
4032: my ($tmp)=keys(%locked);
4033: if ($tmp=~/^error:/) { undef(%locked); }
4034:
4035: if (ref($locked{$file_name}) eq 'ARRAY') {
4036: $is_locked = 'true';
4037: } else {
4038: $is_locked = 'false';
4039: }
4040: }
4041:
4042: # ------------------------------------------------------------- Mark as Read Only
4043:
4044: sub mark_as_readonly {
4045: my ($domain,$user,$files,$what) = @_;
4046: my %current_permissions = &dump('file_permissions',$domain,$user);
4047: my ($tmp)=keys(%current_permissions);
4048: if ($tmp=~/^error:/) { undef(%current_permissions); }
4049: foreach my $file (@{$files}) {
4050: push(@{$current_permissions{$file}},$what);
4051: }
4052: &put('file_permissions',\%current_permissions,$domain,$user);
4053: return;
4054: }
4055:
4056: # ------------------------------------------------------------Save Selected Files
4057:
4058: sub save_selected_files {
4059: my ($user, $path, @files) = @_;
4060: my $filename = $user."savedfiles";
4061: my @other_files = &files_not_in_path($user, $path);
4062: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4063: foreach my $file (@files) {
4064: print (OUT $env{'form.currentpath'}.$file."\n");
4065: }
4066: foreach my $file (@other_files) {
4067: print (OUT $file."\n");
4068: }
4069: close (OUT);
4070: return 'ok';
4071: }
4072:
4073: sub clear_selected_files {
4074: my ($user) = @_;
4075: my $filename = $user."savedfiles";
4076: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4077: print (OUT undef);
4078: close (OUT);
4079: return ("ok");
4080: }
4081:
4082: sub files_in_path {
4083: my ($user, $path) = @_;
4084: my $filename = $user."savedfiles";
4085: my %return_files;
4086: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4087: while (my $line_in = <IN>) {
4088: chomp ($line_in);
4089: my @paths_and_file = split (m!/!, $line_in);
4090: my $file_part = pop (@paths_and_file);
4091: my $path_part = join ('/', @paths_and_file);
4092: $path_part.='/';
4093: my $path_and_file = $path_part.$file_part;
4094: if ($path_part eq $path) {
4095: $return_files{$file_part}= 'selected';
4096: }
4097: }
4098: close (IN);
4099: return (\%return_files);
4100: }
4101:
4102: # called in portfolio select mode, to show files selected NOT in current directory
4103: sub files_not_in_path {
4104: my ($user, $path) = @_;
4105: my $filename = $user."savedfiles";
4106: my @return_files;
4107: my $path_part;
4108: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4109: while (<IN>) {
4110: #ok, I know it's clunky, but I want it to work
4111: my @paths_and_file = split m!/!, $_;
4112: my $file_part = pop (@paths_and_file);
4113: chomp ($file_part);
4114: my $path_part = join ('/', @paths_and_file);
4115: $path_part .= '/';
4116: my $path_and_file = $path_part.$file_part;
4117: if ($path_part ne $path) {
4118: push (@return_files, ($path_and_file));
4119: }
4120: }
4121: close (OUT);
4122: return (@return_files);
4123: }
4124:
4125: #--------------------------------------------------------------Get Marked as Read Only
4126:
4127:
4128: sub get_marked_as_readonly {
4129: my ($domain,$user,$what) = @_;
4130: my %current_permissions = &dump('file_permissions',$domain,$user);
4131: my ($tmp)=keys(%current_permissions);
4132: if ($tmp=~/^error:/) { undef(%current_permissions); }
4133: my @readonly_files;
4134: my $cmp1=$what;
4135: if (ref($what)) { $cmp1=join('',@{$what}) };
4136: while (my ($file_name,$value) = each(%current_permissions)) {
4137: if (ref($value) eq "ARRAY"){
4138: foreach my $stored_what (@{$value}) {
4139: my $cmp2=$stored_what;
4140: if (ref($stored_what)) { $cmp2=join('',@{$stored_what}) };
4141: if ($cmp1 eq $cmp2) {
4142: push(@readonly_files, $file_name);
4143: } elsif (!defined($what)) {
4144: push(@readonly_files, $file_name);
4145: }
4146: }
4147: }
4148: }
4149: return @readonly_files;
4150: }
4151: #-----------------------------------------------------------Get Marked as Read Only Hash
4152:
4153: sub get_marked_as_readonly_hash {
4154: my ($domain,$user,$what) = @_;
4155: my %current_permissions = &dump('file_permissions',$domain,$user);
4156: my ($tmp)=keys(%current_permissions);
4157: if ($tmp=~/^error:/) { undef(%current_permissions); }
4158:
4159: my %readonly_files;
4160: while (my ($file_name,$value) = each(%current_permissions)) {
4161: if (ref($value) eq "ARRAY"){
4162: foreach my $stored_what (@{$value}) {
4163: if ($stored_what eq $what) {
4164: $readonly_files{$file_name} = 'locked';
4165: } elsif (!defined($what)) {
4166: $readonly_files{$file_name} = 'locked';
4167: }
4168: }
4169: }
4170: }
4171: return %readonly_files;
4172: }
4173: # ------------------------------------------------------------ Unmark as Read Only
4174:
4175: sub unmark_as_readonly {
4176: # unmarks $file_name (if $file_name is defined), or all files locked by $what
4177: # for portfolio submissions, $what contains [$symb,$crsid]
4178: my ($domain,$user,$what,$file_name) = @_;
4179: my $symb_crs = $what;
4180: if (ref($what)) { $symb_crs=join('',@$what); }
4181: my %current_permissions = &dump('file_permissions',$domain,$user);
4182: my ($tmp)=keys(%current_permissions);
4183: if ($tmp=~/^error:/) { undef(%current_permissions); }
4184: my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
4185: foreach my $file (@readonly_files) {
4186: if (defined($file_name) && ($file_name ne $file)) { next; }
4187: my $current_locks = $current_permissions{$file};
4188: my @new_locks;
4189: my @del_keys;
4190: if (ref($current_locks) eq "ARRAY"){
4191: foreach my $locker (@{$current_locks}) {
4192: my $compare=$locker;
4193: if (ref($locker)) { $compare=join('',@{$locker}) };
4194: if ($compare ne $symb_crs) {
4195: push(@new_locks, $locker);
4196: }
4197: }
4198: if (scalar(@new_locks) > 0) {
4199: $current_permissions{$file} = \@new_locks;
4200: } else {
4201: push(@del_keys, $file);
4202: &del('file_permissions',\@del_keys, $domain, $user);
4203: delete($current_permissions{$file});
4204: }
4205: }
4206: }
4207: &put('file_permissions',\%current_permissions,$domain,$user);
4208: return;
4209: }
4210:
4211: # ------------------------------------------------------------ Directory lister
4212:
4213: sub dirlist {
4214: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
4215:
4216: $uri=~s/^\///;
4217: $uri=~s/\/$//;
4218: my ($udom, $uname);
4219: (undef,$udom,$uname)=split(/\//,$uri);
4220: if(defined($userdomain)) {
4221: $udom = $userdomain;
4222: }
4223: if(defined($username)) {
4224: $uname = $username;
4225: }
4226:
4227: my $dirRoot = $perlvar{'lonDocRoot'};
4228: if(defined($alternateDirectoryRoot)) {
4229: $dirRoot = $alternateDirectoryRoot;
4230: $dirRoot =~ s/\/$//;
4231: }
4232:
4233: if($udom) {
4234: if($uname) {
4235: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
4236: homeserver($uname,$udom));
4237: my @listing_results;
4238: if ($listing eq 'unknown_cmd') {
4239: $listing=reply('ls:'.$dirRoot.'/'.$uri,
4240: homeserver($uname,$udom));
4241: @listing_results = split(/:/,$listing);
4242: } else {
4243: @listing_results = map { &unescape($_); } split(/:/,$listing);
4244: }
4245: return @listing_results;
4246: } elsif(!defined($alternateDirectoryRoot)) {
4247: my $tryserver;
4248: my %allusers=();
4249: foreach $tryserver (keys %libserv) {
4250: if($hostdom{$tryserver} eq $udom) {
4251: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
4252: $udom, $tryserver);
4253: my @listing_results;
4254: if ($listing eq 'unknown_cmd') {
4255: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
4256: $udom, $tryserver);
4257: @listing_results = split(/:/,$listing);
4258: } else {
4259: @listing_results =
4260: map { &unescape($_); } split(/:/,$listing);
4261: }
4262: if ($listing_results[0] ne 'no_such_dir' &&
4263: $listing_results[0] ne 'empty' &&
4264: $listing_results[0] ne 'con_lost') {
4265: foreach (@listing_results) {
4266: my ($entry,@stat)=split(/&/,$_);
4267: $allusers{$entry}=1;
4268: }
4269: }
4270: }
4271: }
4272: my $alluserstr='';
4273: foreach (sort keys %allusers) {
4274: $alluserstr.=$_.'&user:';
4275: }
4276: $alluserstr=~s/:$//;
4277: return split(/:/,$alluserstr);
4278: } else {
4279: my @emptyResults = ();
4280: push(@emptyResults, 'missing user name');
4281: return split(':',@emptyResults);
4282: }
4283: } elsif(!defined($alternateDirectoryRoot)) {
4284: my $tryserver;
4285: my %alldom=();
4286: foreach $tryserver (keys %libserv) {
4287: $alldom{$hostdom{$tryserver}}=1;
4288: }
4289: my $alldomstr='';
4290: foreach (sort keys %alldom) {
4291: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
4292: }
4293: $alldomstr=~s/:$//;
4294: return split(/:/,$alldomstr);
4295: } else {
4296: my @emptyResults = ();
4297: push(@emptyResults, 'missing domain');
4298: return split(':',@emptyResults);
4299: }
4300: }
4301:
4302: # --------------------------------------------- GetFileTimestamp
4303: # This function utilizes dirlist and returns the date stamp for
4304: # when it was last modified. It will also return an error of -1
4305: # if an error occurs
4306:
4307: ##
4308: ## FIXME: This subroutine assumes its caller knows something about the
4309: ## directory structure of the home server for the student ($root).
4310: ## Not a good assumption to make. Since this is for looking up files
4311: ## in user directories, the full path should be constructed by lond, not
4312: ## whatever machine we request data from.
4313: ##
4314: sub GetFileTimestamp {
4315: my ($studentDomain,$studentName,$filename,$root)=@_;
4316: $studentDomain=~s/\W//g;
4317: $studentName=~s/\W//g;
4318: my $subdir=$studentName.'__';
4319: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4320: my $proname="$studentDomain/$subdir/$studentName";
4321: $proname .= '/'.$filename;
4322: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4323: $studentName, $root);
4324: my @stats = split('&', $fileStat);
4325: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4326: # @stats contains first the filename, then the stat output
4327: return $stats[10]; # so this is 10 instead of 9.
4328: } else {
4329: return -1;
4330: }
4331: }
4332:
4333: # -------------------------------------------------------- Value of a Condition
4334:
4335: sub directcondval {
4336: my $number=shift;
4337: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
4338: &Apache::lonuserstate::evalstate();
4339: }
4340: if ($env{'user.state.'.$env{'request.course.id'}}) {
4341: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
4342: } else {
4343: return 2;
4344: }
4345: }
4346:
4347: sub condval {
4348: my $condidx=shift;
4349: my $result=0;
4350: my $allpathcond='';
4351: foreach (split(/\|/,$condidx)) {
4352: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$_})) {
4353: $allpathcond.=
4354: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$_}.')|';
4355: }
4356: }
4357: $allpathcond=~s/\|$//;
4358: if ($env{'request.course.id'}) {
4359: if ($allpathcond) {
4360: my $operand='|';
4361: my @stack;
4362: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
4363: if ($_ eq '(') {
4364: push @stack,($operand,$result)
4365: } elsif ($_ eq ')') {
4366: my $before=pop @stack;
4367: if (pop @stack eq '&') {
4368: $result=$result>$before?$before:$result;
4369: } else {
4370: $result=$result>$before?$result:$before;
4371: }
4372: } elsif (($_ eq '&') || ($_ eq '|')) {
4373: $operand=$_;
4374: } else {
4375: my $new=directcondval($_);
4376: if ($operand eq '&') {
4377: $result=$result>$new?$new:$result;
4378: } else {
4379: $result=$result>$new?$result:$new;
4380: }
4381: }
4382: }
4383: }
4384: }
4385: return $result;
4386: }
4387:
4388: # ---------------------------------------------------- Devalidate courseresdata
4389:
4390: sub devalidatecourseresdata {
4391: my ($coursenum,$coursedomain)=@_;
4392: my $hashid=$coursenum.':'.$coursedomain;
4393: &devalidate_cache_new('courseres',$hashid);
4394: }
4395:
4396: # --------------------------------------------------- Course Resourcedata Query
4397:
4398: sub get_courseresdata {
4399: my ($coursenum,$coursedomain)=@_;
4400: my $coursehom=&homeserver($coursenum,$coursedomain);
4401: my $hashid=$coursenum.':'.$coursedomain;
4402: my ($result,$cached)=&is_cached_new('courseres',$hashid);
4403: my %dumpreply;
4404: unless (defined($cached)) {
4405: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4406: $result=\%dumpreply;
4407: my ($tmp) = keys(%dumpreply);
4408: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4409: &do_cache_new('courseres',$hashid,$result,600);
4410: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4411: return $tmp;
4412: } elsif ($tmp =~ /^(error)/) {
4413: $result=undef;
4414: &do_cache_new('courseres',$hashid,$result,600);
4415: }
4416: }
4417: return $result;
4418: }
4419:
4420: sub devalidateuserresdata {
4421: my ($uname,$udom)=@_;
4422: my $hashid="$udom:$uname";
4423: &devalidate_cache_new('userres',$hashid);
4424: }
4425:
4426: sub get_userresdata {
4427: my ($uname,$udom)=@_;
4428: #most student don\'t have any data set, check if there is some data
4429: if (&EXT_cache_status($udom,$uname)) { return undef; }
4430:
4431: my $hashid="$udom:$uname";
4432: my ($result,$cached)=&is_cached_new('userres',$hashid);
4433: if (!defined($cached)) {
4434: my %resourcedata=&dump('resourcedata',$udom,$uname);
4435: $result=\%resourcedata;
4436: &do_cache_new('userres',$hashid,$result,600);
4437: }
4438: my ($tmp)=keys(%$result);
4439: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4440: return $result;
4441: }
4442: #error 2 occurs when the .db doesn't exist
4443: if ($tmp!~/error: 2 /) {
4444: &logthis("<font color=blue>WARNING:".
4445: " Trying to get resource data for ".
4446: $uname." at ".$udom.": ".
4447: $tmp."</font>");
4448: } elsif ($tmp=~/error: 2 /) {
4449: #&EXT_cache_set($udom,$uname);
4450: &do_cache_new('userres',$hashid,undef,600);
4451: undef($tmp); # not really an error so don't send it back
4452: }
4453: return $tmp;
4454: }
4455:
4456: sub resdata {
4457: my ($name,$domain,$type,@which)=@_;
4458: my $result;
4459: if ($type eq 'course') {
4460: $result=&get_courseresdata($name,$domain);
4461: } elsif ($type eq 'user') {
4462: $result=&get_userresdata($name,$domain);
4463: }
4464: if (!ref($result)) { return $result; }
4465: foreach my $item (@which) {
4466: if (defined($result->{$item})) {
4467: return $result->{$item};
4468: }
4469: }
4470: return undef;
4471: }
4472:
4473: #
4474: # EXT resource caching routines
4475: #
4476:
4477: sub clear_EXT_cache_status {
4478: &delenv('cache.EXT.');
4479: }
4480:
4481: sub EXT_cache_status {
4482: my ($target_domain,$target_user) = @_;
4483: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4484: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
4485: # We know already the user has no data
4486: return 1;
4487: } else {
4488: return 0;
4489: }
4490: }
4491:
4492: sub EXT_cache_set {
4493: my ($target_domain,$target_user) = @_;
4494: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4495: #&appenv($cachename => time);
4496: }
4497:
4498: # --------------------------------------------------------- Value of a Variable
4499: sub EXT {
4500: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4501:
4502: unless ($varname) { return ''; }
4503: #get real user name/domain, courseid and symb
4504: my $courseid;
4505: my $publicuser;
4506: if ($symbparm) {
4507: $symbparm=&get_symb_from_alias($symbparm);
4508: }
4509: if (!($uname && $udom)) {
4510: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4511: &Apache::lonxml::whichuser($symbparm);
4512: if (!$symbparm) { $symbparm=$cursymb; }
4513: } else {
4514: $courseid=$env{'request.course.id'};
4515: }
4516: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4517: my $rest;
4518: if (defined($therest[0])) {
4519: $rest=join('.',@therest);
4520: } else {
4521: $rest='';
4522: }
4523:
4524: my $qualifierrest=$qualifier;
4525: if ($rest) { $qualifierrest.='.'.$rest; }
4526: my $spacequalifierrest=$space;
4527: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4528: if ($realm eq 'user') {
4529: # --------------------------------------------------------------- user.resource
4530: if ($space eq 'resource') {
4531: if ( (defined($Apache::lonhomework::parsing_a_problem)
4532: || defined($Apache::lonhomework::parsing_a_task))
4533: &&
4534: ($symbparm eq &symbread()) ) {
4535: return $Apache::lonhomework::history{$qualifierrest};
4536: } else {
4537: my %restored;
4538: if ($publicuser || $env{'request.state'} eq 'construct') {
4539: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4540: } else {
4541: %restored=&restore($symbparm,$courseid,$udom,$uname);
4542: }
4543: return $restored{$qualifierrest};
4544: }
4545: # ----------------------------------------------------------------- user.access
4546: } elsif ($space eq 'access') {
4547: # FIXME - not supporting calls for a specific user
4548: return &allowed($qualifier,$rest);
4549: # ------------------------------------------ user.preferences, user.environment
4550: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4551: if (($uname eq $env{'user.name'}) &&
4552: ($udom eq $env{'user.domain'})) {
4553: return $env{join('.',('environment',$qualifierrest))};
4554: } else {
4555: my %returnhash;
4556: if (!$publicuser) {
4557: %returnhash=&userenvironment($udom,$uname,
4558: $qualifierrest);
4559: }
4560: return $returnhash{$qualifierrest};
4561: }
4562: # ----------------------------------------------------------------- user.course
4563: } elsif ($space eq 'course') {
4564: # FIXME - not supporting calls for a specific user
4565: return $env{join('.',('request.course',$qualifier))};
4566: # ------------------------------------------------------------------- user.role
4567: } elsif ($space eq 'role') {
4568: # FIXME - not supporting calls for a specific user
4569: my ($role,$where)=split(/\./,$env{'request.role'});
4570: if ($qualifier eq 'value') {
4571: return $role;
4572: } elsif ($qualifier eq 'extent') {
4573: return $where;
4574: }
4575: # ----------------------------------------------------------------- user.domain
4576: } elsif ($space eq 'domain') {
4577: return $udom;
4578: # ------------------------------------------------------------------- user.name
4579: } elsif ($space eq 'name') {
4580: return $uname;
4581: # ---------------------------------------------------- Any other user namespace
4582: } else {
4583: my %reply;
4584: if (!$publicuser) {
4585: %reply=&get($space,[$qualifierrest],$udom,$uname);
4586: }
4587: return $reply{$qualifierrest};
4588: }
4589: } elsif ($realm eq 'query') {
4590: # ---------------------------------------------- pull stuff out of query string
4591: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4592: [$spacequalifierrest]);
4593: return $env{'form.'.$spacequalifierrest};
4594: } elsif ($realm eq 'request') {
4595: # ------------------------------------------------------------- request.browser
4596: if ($space eq 'browser') {
4597: if ($qualifier eq 'textremote') {
4598: if (&mt('textual_remote_display') eq 'on') {
4599: return 1;
4600: } else {
4601: return 0;
4602: }
4603: } else {
4604: return $env{'browser.'.$qualifier};
4605: }
4606: # ------------------------------------------------------------ request.filename
4607: } else {
4608: return $env{'request.'.$spacequalifierrest};
4609: }
4610: } elsif ($realm eq 'course') {
4611: # ---------------------------------------------------------- course.description
4612: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
4613: } elsif ($realm eq 'resource') {
4614:
4615: my $section;
4616: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
4617: if (!$symbparm) { $symbparm=&symbread(); }
4618: }
4619: my ($courselevelm,$courselevel);
4620: if ($symbparm && defined($courseid) &&
4621: $courseid eq $env{'request.course.id'}) {
4622:
4623: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4624:
4625: # ----------------------------------------------------- Cascading lookup scheme
4626: my $symbp=$symbparm;
4627: my $mapp=(&decode_symb($symbp))[0];
4628:
4629: my $symbparm=$symbp.'.'.$spacequalifierrest;
4630: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4631:
4632: if (($env{'user.name'} eq $uname) &&
4633: ($env{'user.domain'} eq $udom)) {
4634: $section=$env{'request.course.sec'};
4635: } else {
4636: if (! defined($usection)) {
4637: $section=&getsection($udom,$uname,$courseid);
4638: } else {
4639: $section = $usection;
4640: }
4641: }
4642:
4643: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4644: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4645: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4646:
4647: $courselevel=$courseid.'.'.$spacequalifierrest;
4648: my $courselevelr=$courseid.'.'.$symbparm;
4649: $courselevelm=$courseid.'.'.$mapparm;
4650:
4651: # ----------------------------------------------------------- first, check user
4652:
4653: my $userreply=&resdata($uname,$udom,'user',
4654: ($courselevelr,$courselevelm,
4655: $courselevel));
4656:
4657: if (defined($userreply)) { return $userreply; }
4658:
4659: # ------------------------------------------------ second, check some of course
4660:
4661: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
4662: $env{'course.'.$courseid.'.domain'},
4663: 'course',
4664: ($seclevelr,$seclevelm,$seclevel,
4665: $courselevelr));
4666: if (defined($coursereply)) { return $coursereply; }
4667:
4668: # ------------------------------------------------------ third, check map parms
4669: my %parmhash=();
4670: my $thisparm='';
4671: if (tie(%parmhash,'GDBM_File',
4672: $env{'request.course.fn'}.'_parms.db',
4673: &GDBM_READER(),0640)) {
4674: $thisparm=$parmhash{$symbparm};
4675: untie(%parmhash);
4676: }
4677: if ($thisparm) { return $thisparm; }
4678: }
4679: # ------------------------------------------ fourth, look in resource metadata
4680:
4681: $spacequalifierrest=~s/\./\_/;
4682: my $filename;
4683: if (!$symbparm) { $symbparm=&symbread(); }
4684: if ($symbparm) {
4685: $filename=(&decode_symb($symbparm))[2];
4686: } else {
4687: $filename=$env{'request.filename'};
4688: }
4689: my $metadata=&metadata($filename,$spacequalifierrest);
4690: if (defined($metadata)) { return $metadata; }
4691: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4692: if (defined($metadata)) { return $metadata; }
4693:
4694: # ---------------------------------------------- fourth, look in rest pf course
4695: if ($symbparm && defined($courseid) &&
4696: $courseid eq $env{'request.course.id'}) {
4697: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
4698: $env{'course.'.$courseid.'.domain'},
4699: 'course',
4700: ($courselevelm,$courselevel));
4701: if (defined($coursereply)) { return $coursereply; }
4702: }
4703: # ------------------------------------------------------------------ Cascade up
4704: unless ($space eq '0') {
4705: my @parts=split(/_/,$space);
4706: my $id=pop(@parts);
4707: my $part=join('_',@parts);
4708: if ($part eq '') { $part='0'; }
4709: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4710: $symbparm,$udom,$uname,$section,1);
4711: if (defined($partgeneral)) { return $partgeneral; }
4712: }
4713: if ($recurse) { return undef; }
4714: my $pack_def=&packages_tab_default($filename,$varname);
4715: if (defined($pack_def)) { return $pack_def; }
4716:
4717: # ---------------------------------------------------- Any other user namespace
4718: } elsif ($realm eq 'environment') {
4719: # ----------------------------------------------------------------- environment
4720: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
4721: return $env{'environment.'.$spacequalifierrest};
4722: } else {
4723: my %returnhash=&userenvironment($udom,$uname,
4724: $spacequalifierrest);
4725: return $returnhash{$spacequalifierrest};
4726: }
4727: } elsif ($realm eq 'system') {
4728: # ----------------------------------------------------------------- system.time
4729: if ($space eq 'time') {
4730: return time;
4731: }
4732: }
4733: return '';
4734: }
4735:
4736: sub packages_tab_default {
4737: my ($uri,$varname)=@_;
4738: my (undef,$part,$name)=split(/\./,$varname);
4739: my $packages=&metadata($uri,'packages');
4740: foreach my $package (split(/,/,$packages)) {
4741: my ($pack_type,$pack_part)=split(/_/,$package,2);
4742: if (defined($packagetab{"$pack_type&$name&default"})) {
4743: return $packagetab{"$pack_type&$name&default"};
4744: }
4745: if ($pack_type eq 'part') { $pack_part='0'; }
4746: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4747: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4748: }
4749: }
4750: return undef;
4751: }
4752:
4753: sub add_prefix_and_part {
4754: my ($prefix,$part)=@_;
4755: my $keyroot;
4756: if (defined($prefix) && $prefix !~ /^__/) {
4757: # prefix that has a part already
4758: $keyroot=$prefix;
4759: } elsif (defined($prefix)) {
4760: # prefix that is missing a part
4761: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4762: } else {
4763: # no prefix at all
4764: if (defined($part)) { $keyroot='_'.$part; }
4765: }
4766: return $keyroot;
4767: }
4768:
4769: # ---------------------------------------------------------------- Get metadata
4770:
4771: my %metaentry;
4772: sub metadata {
4773: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
4774: $uri=&declutter($uri);
4775: # if it is a non metadata possible uri return quickly
4776: if (($uri eq '') ||
4777: (($uri =~ m|^/*adm/|) &&
4778: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
4779: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
4780: ($uri =~ m|home/[^/]+/public_html/|)) {
4781: return undef;
4782: }
4783: my $filename=$uri;
4784: $uri=~s/\.meta$//;
4785: #
4786: # Is the metadata already cached?
4787: # Look at timestamp of caching
4788: # Everything is cached by the main uri, libraries are never directly cached
4789: #
4790: if (!defined($liburi)) {
4791: my ($result,$cached)=&is_cached_new('meta',$uri);
4792: if (defined($cached)) { return $result->{':'.$what}; }
4793: }
4794: {
4795: #
4796: # Is this a recursive call for a library?
4797: #
4798: # if (! exists($metacache{$uri})) {
4799: # $metacache{$uri}={};
4800: # }
4801: if ($liburi) {
4802: $liburi=&declutter($liburi);
4803: $filename=$liburi;
4804: } else {
4805: &devalidate_cache_new('meta',$uri);
4806: undef(%metaentry);
4807: }
4808: my %metathesekeys=();
4809: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
4810: my $metastring;
4811: if ($uri !~ m -^(uploaded|editupload)/-) {
4812: my $file=&filelocation('',&clutter($filename));
4813: #push(@{$metaentry{$uri.'.file'}},$file);
4814: $metastring=&getfile($file);
4815: }
4816: my $parser=HTML::LCParser->new(\$metastring);
4817: my $token;
4818: undef %metathesekeys;
4819: while ($token=$parser->get_token) {
4820: if ($token->[0] eq 'S') {
4821: if (defined($token->[2]->{'package'})) {
4822: #
4823: # This is a package - get package info
4824: #
4825: my $package=$token->[2]->{'package'};
4826: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4827: if (defined($token->[2]->{'id'})) {
4828: $keyroot.='_'.$token->[2]->{'id'};
4829: }
4830: if ($metaentry{':packages'}) {
4831: $metaentry{':packages'}.=','.$package.$keyroot;
4832: } else {
4833: $metaentry{':packages'}=$package.$keyroot;
4834: }
4835: foreach (sort keys %packagetab) {
4836: my $part=$keyroot;
4837: $part=~s/^\_//;
4838: if ($_=~/^\Q$package\E\&/ ||
4839: $_=~/^\Q$package\E_0\&/) {
4840: my ($pack,$name,$subp)=split(/\&/,$_);
4841: # ignore package.tab specified default values
4842: # here &package_tab_default() will fetch those
4843: if ($subp eq 'default') { next; }
4844: my $value=$packagetab{$_};
4845: my $unikey;
4846: if ($pack =~ /_0$/) {
4847: $unikey='parameter_0_'.$name;
4848: $part=0;
4849: } else {
4850: $unikey='parameter'.$keyroot.'_'.$name;
4851: }
4852: if ($subp eq 'display') {
4853: $value.=' [Part: '.$part.']';
4854: }
4855: $metaentry{':'.$unikey.'.part'}=$part;
4856: $metathesekeys{$unikey}=1;
4857: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
4858: $metaentry{':'.$unikey.'.'.$subp}=$value;
4859: }
4860: if (defined($metaentry{':'.$unikey.'.default'})) {
4861: $metaentry{':'.$unikey}=
4862: $metaentry{':'.$unikey.'.default'};
4863: }
4864: }
4865: }
4866: } else {
4867: #
4868: # This is not a package - some other kind of start tag
4869: #
4870: my $entry=$token->[1];
4871: my $unikey;
4872: if ($entry eq 'import') {
4873: $unikey='';
4874: } else {
4875: $unikey=$entry;
4876: }
4877: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4878:
4879: if (defined($token->[2]->{'id'})) {
4880: $unikey.='_'.$token->[2]->{'id'};
4881: }
4882:
4883: if ($entry eq 'import') {
4884: #
4885: # Importing a library here
4886: #
4887: if ($depthcount<20) {
4888: my $location=$parser->get_text('/import');
4889: my $dir=$filename;
4890: $dir=~s|[^/]*$||;
4891: $location=&filelocation($dir,$location);
4892: foreach (sort(split(/\,/,&metadata($uri,'keys',
4893: $location,$unikey,
4894: $depthcount+1)))) {
4895: $metaentry{':'.$_}=$metaentry{':'.$_};
4896: $metathesekeys{$_}=1;
4897: }
4898: }
4899: } else {
4900:
4901: if (defined($token->[2]->{'name'})) {
4902: $unikey.='_'.$token->[2]->{'name'};
4903: }
4904: $metathesekeys{$unikey}=1;
4905: foreach (@{$token->[3]}) {
4906: $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4907: }
4908: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4909: my $default=$metaentry{':'.$unikey.'.default'};
4910: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4911: # only ws inside the tag, and not in default, so use default
4912: # as value
4913: $metaentry{':'.$unikey}=$default;
4914: } else {
4915: # either something interesting inside the tag or default
4916: # uninteresting
4917: $metaentry{':'.$unikey}=$internaltext;
4918: }
4919: # end of not-a-package not-a-library import
4920: }
4921: # end of not-a-package start tag
4922: }
4923: # the next is the end of "start tag"
4924: }
4925: }
4926: my ($extension) = ($uri =~ /\.(\w+)$/);
4927: foreach my $key (sort(keys(%packagetab))) {
4928: #no specific packages #how's our extension
4929: if ($key!~/^extension_\Q$extension\E&/) { next; }
4930: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4931: \%metathesekeys);
4932: }
4933: if (!exists($metaentry{':packages'})) {
4934: foreach my $key (sort(keys(%packagetab))) {
4935: #no specific packages well let's get default then
4936: if ($key!~/^default&/) { next; }
4937: &metadata_create_package_def($uri,$key,'default',
4938: \%metathesekeys);
4939: }
4940: }
4941: # are there custom rights to evaluate
4942: if ($metaentry{':copyright'} eq 'custom') {
4943:
4944: #
4945: # Importing a rights file here
4946: #
4947: unless ($depthcount) {
4948: my $location=$metaentry{':customdistributionfile'};
4949: my $dir=$filename;
4950: $dir=~s|[^/]*$||;
4951: $location=&filelocation($dir,$location);
4952: foreach (sort(split(/\,/,&metadata($uri,'keys',
4953: $location,'_rights',
4954: $depthcount+1)))) {
4955: #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
4956: $metathesekeys{$_}=1;
4957: }
4958: }
4959: }
4960: $metaentry{':keys'}=join(',',keys %metathesekeys);
4961: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
4962: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
4963: &do_cache_new('meta',$uri,\%metaentry,60*60*24);
4964: # this is the end of "was not already recently cached
4965: }
4966: return $metaentry{':'.$what};
4967: }
4968:
4969: sub metadata_create_package_def {
4970: my ($uri,$key,$package,$metathesekeys)=@_;
4971: my ($pack,$name,$subp)=split(/\&/,$key);
4972: if ($subp eq 'default') { next; }
4973:
4974: if (defined($metaentry{':packages'})) {
4975: $metaentry{':packages'}.=','.$package;
4976: } else {
4977: $metaentry{':packages'}=$package;
4978: }
4979: my $value=$packagetab{$key};
4980: my $unikey;
4981: $unikey='parameter_0_'.$name;
4982: $metaentry{':'.$unikey.'.part'}=0;
4983: $$metathesekeys{$unikey}=1;
4984: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
4985: $metaentry{':'.$unikey.'.'.$subp}=$value;
4986: }
4987: if (defined($metaentry{':'.$unikey.'.default'})) {
4988: $metaentry{':'.$unikey}=
4989: $metaentry{':'.$unikey.'.default'};
4990: }
4991: }
4992:
4993: sub metadata_generate_part0 {
4994: my ($metadata,$metacache,$uri) = @_;
4995: my %allnames;
4996: foreach my $metakey (sort keys %$metadata) {
4997: if ($metakey=~/^parameter\_(.*)/) {
4998: my $part=$$metacache{':'.$metakey.'.part'};
4999: my $name=$$metacache{':'.$metakey.'.name'};
5000: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
5001: $allnames{$name}=$part;
5002: }
5003: }
5004: }
5005: foreach my $name (keys(%allnames)) {
5006: $$metadata{"parameter_0_$name"}=1;
5007: my $key=":parameter_0_$name";
5008: $$metacache{"$key.part"}='0';
5009: $$metacache{"$key.name"}=$name;
5010: $$metacache{"$key.type"}=$$metacache{':parameter_'.
5011: $allnames{$name}.'_'.$name.
5012: '.type'};
5013: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
5014: '.display'};
5015: my $expr='[Part: '.$allnames{$name}.']';
5016: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
5017: $$metacache{"$key.display"}=$olddis;
5018: }
5019: }
5020:
5021: # ------------------------------------------------- Get the title of a resource
5022:
5023: sub gettitle {
5024: my $urlsymb=shift;
5025: my $symb=&symbread($urlsymb);
5026: if ($symb) {
5027: my $key=$env{'request.course.id'}."\0".$symb;
5028: my ($result,$cached)=&is_cached_new('title',$key);
5029: if (defined($cached)) {
5030: return $result;
5031: }
5032: my ($map,$resid,$url)=&decode_symb($symb);
5033: my $title='';
5034: my %bighash;
5035: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5036: &GDBM_READER(),0640)) {
5037: my $mapid=$bighash{'map_pc_'.&clutter($map)};
5038: $title=$bighash{'title_'.$mapid.'.'.$resid};
5039: untie %bighash;
5040: }
5041: $title=~s/\&colon\;/\:/gs;
5042: if ($title) {
5043: return &do_cache_new('title',$key,$title,600);
5044: }
5045: $urlsymb=$url;
5046: }
5047: my $title=&metadata($urlsymb,'title');
5048: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
5049: return $title;
5050: }
5051:
5052: sub get_slot {
5053: my ($which,$cnum,$cdom)=@_;
5054: if (!$cnum || !$cdom) {
5055: (undef,my $courseid)=&Apache::lonxml::whichuser();
5056: $cdom=$env{'course.'.$courseid.'.domain'};
5057: $cnum=$env{'course.'.$courseid.'.num'};
5058: }
5059: my %slotinfo=&get('slots',[$which],$cdom,$cnum);
5060: &Apache::lonhomework::showhash(%slotinfo);
5061: my ($tmp)=keys(%slotinfo);
5062: if ($tmp=~/^error:/) { return (); }
5063: if (ref($slotinfo{$which}) eq 'HASH') {
5064: return %{$slotinfo{$which}};
5065: }
5066: return $slotinfo{$which};
5067: }
5068: # ------------------------------------------------- Update symbolic store links
5069:
5070: sub symblist {
5071: my ($mapname,%newhash)=@_;
5072: $mapname=&deversion(&declutter($mapname));
5073: my %hash;
5074: if (($env{'request.course.fn'}) && (%newhash)) {
5075: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5076: &GDBM_WRCREAT(),0640)) {
5077: foreach (keys %newhash) {
5078: $hash{declutter($_)}=&encode_symb($mapname,$newhash{$_}->[1],
5079: $newhash{$_}->[0]);
5080: }
5081: if (untie(%hash)) {
5082: return 'ok';
5083: }
5084: }
5085: }
5086: return 'error';
5087: }
5088:
5089: # --------------------------------------------------------------- Verify a symb
5090:
5091: sub symbverify {
5092: my ($symb,$thisurl)=@_;
5093: my $thisfn=$thisurl;
5094: # wrapper not part of symbs
5095: $thisfn=~s/^\/adm\/wrapper//;
5096: $thisfn=&declutter($thisfn);
5097: # direct jump to resource in page or to a sequence - will construct own symbs
5098: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
5099: # check URL part
5100: my ($map,$resid,$url)=&decode_symb($symb);
5101:
5102: unless ($url eq $thisfn) { return 0; }
5103:
5104: $symb=&symbclean($symb);
5105: $thisurl=&deversion($thisurl);
5106: $thisfn=&deversion($thisfn);
5107:
5108: my %bighash;
5109: my $okay=0;
5110:
5111: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5112: &GDBM_READER(),0640)) {
5113: my $ids=$bighash{'ids_'.&clutter($thisurl)};
5114: unless ($ids) {
5115: $ids=$bighash{'ids_/'.$thisurl};
5116: }
5117: if ($ids) {
5118: # ------------------------------------------------------------------- Has ID(s)
5119: foreach (split(/\,/,$ids)) {
5120: my ($mapid,$resid)=split(/\./,$_);
5121: if (
5122: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
5123: eq $symb) {
5124: if (($env{'request.role.adv'}) ||
5125: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
5126: $okay=1;
5127: }
5128: }
5129: }
5130: }
5131: untie(%bighash);
5132: }
5133: return $okay;
5134: }
5135:
5136: # --------------------------------------------------------------- Clean-up symb
5137:
5138: sub symbclean {
5139: my $symb=shift;
5140: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5141: # remove version from map
5142: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
5143:
5144: # remove version from URL
5145: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
5146:
5147: # remove wrapper
5148:
5149: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
5150: return $symb;
5151: }
5152:
5153: # ---------------------------------------------- Split symb to find map and url
5154:
5155: sub encode_symb {
5156: my ($map,$resid,$url)=@_;
5157: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
5158: }
5159:
5160: sub decode_symb {
5161: my $symb=shift;
5162: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5163: my ($map,$resid,$url)=split(/___/,$symb);
5164: return (&fixversion($map),$resid,&fixversion($url));
5165: }
5166:
5167: sub fixversion {
5168: my $fn=shift;
5169: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
5170: my %bighash;
5171: my $uri=&clutter($fn);
5172: my $key=$env{'request.course.id'}.'_'.$uri;
5173: # is this cached?
5174: my ($result,$cached)=&is_cached_new('courseresversion',$key);
5175: if (defined($cached)) { return $result; }
5176: # unfortunately not cached, or expired
5177: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5178: &GDBM_READER(),0640)) {
5179: if ($bighash{'version_'.$uri}) {
5180: my $version=$bighash{'version_'.$uri};
5181: unless (($version eq 'mostrecent') ||
5182: ($version==&getversion($uri))) {
5183: $uri=~s/\.(\w+)$/\.$version\.$1/;
5184: }
5185: }
5186: untie %bighash;
5187: }
5188: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
5189: }
5190:
5191: sub deversion {
5192: my $url=shift;
5193: $url=~s/\.\d+\.(\w+)$/\.$1/;
5194: return $url;
5195: }
5196:
5197: # ------------------------------------------------------ Return symb list entry
5198:
5199: sub symbread {
5200: my ($thisfn,$donotrecurse)=@_;
5201: my $cache_str='request.symbread.cached.'.$thisfn;
5202: if (defined($env{$cache_str})) { return $env{$cache_str}; }
5203: # no filename provided? try from environment
5204: unless ($thisfn) {
5205: if ($env{'request.symb'}) {
5206: return $env{$cache_str}=&symbclean($env{'request.symb'});
5207: }
5208: $thisfn=$env{'request.filename'};
5209: }
5210: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5211: # is that filename actually a symb? Verify, clean, and return
5212: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
5213: if (&symbverify($thisfn,$1)) {
5214: return $env{$cache_str}=&symbclean($thisfn);
5215: }
5216: }
5217: $thisfn=declutter($thisfn);
5218: my %hash;
5219: my %bighash;
5220: my $syval='';
5221: if (($env{'request.course.fn'}) && ($thisfn)) {
5222: my $targetfn = $thisfn;
5223: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
5224: $targetfn = 'adm/wrapper/'.$thisfn;
5225: }
5226: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5227: &GDBM_READER(),0640)) {
5228: $syval=$hash{$targetfn};
5229: untie(%hash);
5230: }
5231: # ---------------------------------------------------------- There was an entry
5232: if ($syval) {
5233: #unless ($syval=~/\_\d+$/) {
5234: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
5235: #&appenv('request.ambiguous' => $thisfn);
5236: #return $env{$cache_str}='';
5237: #}
5238: #$syval.=$1;
5239: #}
5240: } else {
5241: # ------------------------------------------------------- Was not in symb table
5242: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5243: &GDBM_READER(),0640)) {
5244: # ---------------------------------------------- Get ID(s) for current resource
5245: my $ids=$bighash{'ids_'.&clutter($thisfn)};
5246: unless ($ids) {
5247: $ids=$bighash{'ids_/'.$thisfn};
5248: }
5249: unless ($ids) {
5250: # alias?
5251: $ids=$bighash{'mapalias_'.$thisfn};
5252: }
5253: if ($ids) {
5254: # ------------------------------------------------------------------- Has ID(s)
5255: my @possibilities=split(/\,/,$ids);
5256: if ($#possibilities==0) {
5257: # ----------------------------------------------- There is only one possibility
5258: my ($mapid,$resid)=split(/\./,$ids);
5259: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5260: $resid,$thisfn);
5261: } elsif (!$donotrecurse) {
5262: # ------------------------------------------ There is more than one possibility
5263: my $realpossible=0;
5264: foreach (@possibilities) {
5265: my $file=$bighash{'src_'.$_};
5266: if (&allowed('bre',$file)) {
5267: my ($mapid,$resid)=split(/\./,$_);
5268: if ($bighash{'map_type_'.$mapid} ne 'page') {
5269: $realpossible++;
5270: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5271: $resid,$thisfn);
5272: }
5273: }
5274: }
5275: if ($realpossible!=1) { $syval=''; }
5276: } else {
5277: $syval='';
5278: }
5279: }
5280: untie(%bighash)
5281: }
5282: }
5283: if ($syval) {
5284: return $env{$cache_str}=$syval;
5285: }
5286: }
5287: &appenv('request.ambiguous' => $thisfn);
5288: return $env{$cache_str}='';
5289: }
5290:
5291: # ---------------------------------------------------------- Return random seed
5292:
5293: sub numval {
5294: my $txt=shift;
5295: $txt=~tr/A-J/0-9/;
5296: $txt=~tr/a-j/0-9/;
5297: $txt=~tr/K-T/0-9/;
5298: $txt=~tr/k-t/0-9/;
5299: $txt=~tr/U-Z/0-5/;
5300: $txt=~tr/u-z/0-5/;
5301: $txt=~s/\D//g;
5302: if ($_64bit) { if ($txt > 2**32) { return -1; } }
5303: return int($txt);
5304: }
5305:
5306: sub numval2 {
5307: my $txt=shift;
5308: $txt=~tr/A-J/0-9/;
5309: $txt=~tr/a-j/0-9/;
5310: $txt=~tr/K-T/0-9/;
5311: $txt=~tr/k-t/0-9/;
5312: $txt=~tr/U-Z/0-5/;
5313: $txt=~tr/u-z/0-5/;
5314: $txt=~s/\D//g;
5315: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5316: my $total;
5317: foreach my $val (@txts) { $total+=$val; }
5318: if ($_64bit) { if ($total > 2**32) { return -1; } }
5319: return int($total);
5320: }
5321:
5322: sub numval3 {
5323: use integer;
5324: my $txt=shift;
5325: $txt=~tr/A-J/0-9/;
5326: $txt=~tr/a-j/0-9/;
5327: $txt=~tr/K-T/0-9/;
5328: $txt=~tr/k-t/0-9/;
5329: $txt=~tr/U-Z/0-5/;
5330: $txt=~tr/u-z/0-5/;
5331: $txt=~s/\D//g;
5332: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5333: my $total;
5334: foreach my $val (@txts) { $total+=$val; }
5335: if ($_64bit) { $total=(($total<<32)>>32); }
5336: return $total;
5337: }
5338:
5339: sub latest_rnd_algorithm_id {
5340: return '64bit4';
5341: }
5342:
5343: sub get_rand_alg {
5344: my ($courseid)=@_;
5345: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5346: if ($courseid) {
5347: return $env{"course.$courseid.rndseed"};
5348: }
5349: return &latest_rnd_algorithm_id();
5350: }
5351:
5352: sub validCODE {
5353: my ($CODE)=@_;
5354: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5355: return 0;
5356: }
5357:
5358: sub getCODE {
5359: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
5360: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
5361: defined($Apache::lonhomework::parsing_a_task) ) &&
5362: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5363: return $Apache::lonhomework::history{'resource.CODE'};
5364: }
5365: return undef;
5366: }
5367:
5368: sub rndseed {
5369: my ($symb,$courseid,$domain,$username)=@_;
5370:
5371: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5372: if (!$symb) {
5373: unless ($symb=$wsymb) { return time; }
5374: }
5375: if (!$courseid) { $courseid=$wcourseid; }
5376: if (!$domain) { $domain=$wdomain; }
5377: if (!$username) { $username=$wusername }
5378: my $which=&get_rand_alg();
5379: if (defined(&getCODE())) {
5380: if ($which eq '64bit4') {
5381: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5382: } else {
5383: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5384: }
5385: } elsif ($which eq '64bit4') {
5386: return &rndseed_64bit4($symb,$courseid,$domain,$username);
5387: } elsif ($which eq '64bit3') {
5388: return &rndseed_64bit3($symb,$courseid,$domain,$username);
5389: } elsif ($which eq '64bit2') {
5390: return &rndseed_64bit2($symb,$courseid,$domain,$username);
5391: } elsif ($which eq '64bit') {
5392: return &rndseed_64bit($symb,$courseid,$domain,$username);
5393: }
5394: return &rndseed_32bit($symb,$courseid,$domain,$username);
5395: }
5396:
5397: sub rndseed_32bit {
5398: my ($symb,$courseid,$domain,$username)=@_;
5399: {
5400: use integer;
5401: my $symbchck=unpack("%32C*",$symb) << 27;
5402: my $symbseed=numval($symb) << 22;
5403: my $namechck=unpack("%32C*",$username) << 17;
5404: my $nameseed=numval($username) << 12;
5405: my $domainseed=unpack("%32C*",$domain) << 7;
5406: my $courseseed=unpack("%32C*",$courseid);
5407: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
5408: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5409: #&Apache::lonxml::debug("rndseed :$num:$symb");
5410: if ($_64bit) { $num=(($num<<32)>>32); }
5411: return $num;
5412: }
5413: }
5414:
5415: sub rndseed_64bit {
5416: my ($symb,$courseid,$domain,$username)=@_;
5417: {
5418: use integer;
5419: my $symbchck=unpack("%32S*",$symb) << 21;
5420: my $symbseed=numval($symb) << 10;
5421: my $namechck=unpack("%32S*",$username);
5422:
5423: my $nameseed=numval($username) << 21;
5424: my $domainseed=unpack("%32S*",$domain) << 10;
5425: my $courseseed=unpack("%32S*",$courseid);
5426:
5427: my $num1=$symbchck+$symbseed+$namechck;
5428: my $num2=$nameseed+$domainseed+$courseseed;
5429: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5430: #&Apache::lonxml::debug("rndseed :$num:$symb");
5431: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5432: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5433: return "$num1,$num2";
5434: }
5435: }
5436:
5437: sub rndseed_64bit2 {
5438: my ($symb,$courseid,$domain,$username)=@_;
5439: {
5440: use integer;
5441: # strings need to be an even # of cahracters long, it it is odd the
5442: # last characters gets thrown away
5443: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5444: my $symbseed=numval($symb) << 10;
5445: my $namechck=unpack("%32S*",$username.' ');
5446:
5447: my $nameseed=numval($username) << 21;
5448: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5449: my $courseseed=unpack("%32S*",$courseid.' ');
5450:
5451: my $num1=$symbchck+$symbseed+$namechck;
5452: my $num2=$nameseed+$domainseed+$courseseed;
5453: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5454: #&Apache::lonxml::debug("rndseed :$num:$symb");
5455: return "$num1,$num2";
5456: }
5457: }
5458:
5459: sub rndseed_64bit3 {
5460: my ($symb,$courseid,$domain,$username)=@_;
5461: {
5462: use integer;
5463: # strings need to be an even # of cahracters long, it it is odd the
5464: # last characters gets thrown away
5465: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5466: my $symbseed=numval2($symb) << 10;
5467: my $namechck=unpack("%32S*",$username.' ');
5468:
5469: my $nameseed=numval2($username) << 21;
5470: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5471: my $courseseed=unpack("%32S*",$courseid.' ');
5472:
5473: my $num1=$symbchck+$symbseed+$namechck;
5474: my $num2=$nameseed+$domainseed+$courseseed;
5475: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5476: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5477: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5478:
5479: return "$num1:$num2";
5480: }
5481: }
5482:
5483: sub rndseed_64bit4 {
5484: my ($symb,$courseid,$domain,$username)=@_;
5485: {
5486: use integer;
5487: # strings need to be an even # of cahracters long, it it is odd the
5488: # last characters gets thrown away
5489: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5490: my $symbseed=numval3($symb) << 10;
5491: my $namechck=unpack("%32S*",$username.' ');
5492:
5493: my $nameseed=numval3($username) << 21;
5494: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5495: my $courseseed=unpack("%32S*",$courseid.' ');
5496:
5497: my $num1=$symbchck+$symbseed+$namechck;
5498: my $num2=$nameseed+$domainseed+$courseseed;
5499: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5500: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5501: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5502:
5503: return "$num1:$num2";
5504: }
5505: }
5506:
5507: sub rndseed_CODE_64bit {
5508: my ($symb,$courseid,$domain,$username)=@_;
5509: {
5510: use integer;
5511: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5512: my $symbseed=numval2($symb);
5513: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5514: my $CODEseed=numval(&getCODE());
5515: my $courseseed=unpack("%32S*",$courseid.' ');
5516: my $num1=$symbseed+$CODEchck;
5517: my $num2=$CODEseed+$courseseed+$symbchck;
5518: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5519: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5520: if ($_64bit) { $num1=(($num1<<32)>>32); }
5521: if ($_64bit) { $num2=(($num2<<32)>>32); }
5522: return "$num1:$num2";
5523: }
5524: }
5525:
5526: sub rndseed_CODE_64bit4 {
5527: my ($symb,$courseid,$domain,$username)=@_;
5528: {
5529: use integer;
5530: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5531: my $symbseed=numval3($symb);
5532: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5533: my $CODEseed=numval3(&getCODE());
5534: my $courseseed=unpack("%32S*",$courseid.' ');
5535: my $num1=$symbseed+$CODEchck;
5536: my $num2=$CODEseed+$courseseed+$symbchck;
5537: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5538: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5539: if ($_64bit) { $num1=(($num1<<32)>>32); }
5540: if ($_64bit) { $num2=(($num2<<32)>>32); }
5541: return "$num1:$num2";
5542: }
5543: }
5544:
5545: sub setup_random_from_rndseed {
5546: my ($rndseed)=@_;
5547: if ($rndseed =~/([,:])/) {
5548: my ($num1,$num2)=split(/[,:]/,$rndseed);
5549: &Math::Random::random_set_seed(abs($num1),abs($num2));
5550: } else {
5551: &Math::Random::random_set_seed_from_phrase($rndseed);
5552: }
5553: }
5554:
5555: sub latest_receipt_algorithm_id {
5556: return 'receipt2';
5557: }
5558:
5559: sub recunique {
5560: my $fucourseid=shift;
5561: my $unique;
5562: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5563: $unique=$env{"course.$fucourseid.internal.encseed"};
5564: } else {
5565: $unique=$perlvar{'lonReceipt'};
5566: }
5567: return unpack("%32C*",$unique);
5568: }
5569:
5570: sub recprefix {
5571: my $fucourseid=shift;
5572: my $prefix;
5573: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5574: $prefix=$env{"course.$fucourseid.internal.encpref"};
5575: } else {
5576: $prefix=$perlvar{'lonHostID'};
5577: }
5578: return unpack("%32C*",$prefix);
5579: }
5580:
5581: sub ireceipt {
5582: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
5583: my $cuname=unpack("%32C*",$funame);
5584: my $cudom=unpack("%32C*",$fudom);
5585: my $cucourseid=unpack("%32C*",$fucourseid);
5586: my $cusymb=unpack("%32C*",$fusymb);
5587: my $cunique=&recunique($fucourseid);
5588: my $cpart=unpack("%32S*",$part);
5589: my $return =&recprefix($fucourseid).'-';
5590: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
5591: $env{'request.state'} eq 'construct') {
5592: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
5593: " and ".($cpart%$cudom));
5594:
5595: $return.= ($cunique%$cuname+
5596: $cunique%$cudom+
5597: $cusymb%$cuname+
5598: $cusymb%$cudom+
5599: $cucourseid%$cuname+
5600: $cucourseid%$cudom+
5601: $cpart%$cuname+
5602: $cpart%$cudom);
5603: } else {
5604: $return.= ($cunique%$cuname+
5605: $cunique%$cudom+
5606: $cusymb%$cuname+
5607: $cusymb%$cudom+
5608: $cucourseid%$cuname+
5609: $cucourseid%$cudom);
5610: }
5611: return $return;
5612: }
5613:
5614: sub receipt {
5615: my ($part)=@_;
5616: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5617: return &ireceipt($name,$domain,$courseid,$symb,$part);
5618: }
5619:
5620: # ------------------------------------------------------------ Serves up a file
5621: # returns either the contents of the file or
5622: # -1 if the file doesn't exist
5623: #
5624: # if the target is a file that was uploaded via DOCS,
5625: # a check will be made to see if a current copy exists on the local server,
5626: # if it does this will be served, otherwise a copy will be retrieved from
5627: # the home server for the course and stored in /home/httpd/html/userfiles on
5628: # the local server.
5629:
5630: sub getfile {
5631: my ($file) = @_;
5632: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5633: &repcopy($file);
5634: return &readfile($file);
5635: }
5636:
5637: sub repcopy_userfile {
5638: my ($file)=@_;
5639: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5640: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
5641: my ($cdom,$cnum,$filename) =
5642: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5643: my ($info,$rtncode);
5644: my $uri="/uploaded/$cdom/$cnum/$filename";
5645: if (-e "$file") {
5646: my @fileinfo = stat($file);
5647: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5648: if ($lwpresp ne 'ok') {
5649: if ($rtncode eq '404') {
5650: unlink($file);
5651: }
5652: #my $ua=new LWP::UserAgent;
5653: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5654: #my $response=$ua->request($request);
5655: #if ($response->is_success()) {
5656: # return $response->content;
5657: # } else {
5658: # return -1;
5659: # }
5660: return -1;
5661: }
5662: if ($info < $fileinfo[9]) {
5663: return 'ok';
5664: }
5665: $info = '';
5666: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5667: if ($lwpresp ne 'ok') {
5668: return -1;
5669: }
5670: } else {
5671: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5672: if ($lwpresp ne 'ok') {
5673: my $ua=new LWP::UserAgent;
5674: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5675: my $response=$ua->request($request);
5676: if ($response->is_success()) {
5677: $info=$response->content;
5678: } else {
5679: return -1;
5680: }
5681: }
5682: my @parts = ($cdom,$cnum);
5683: if ($filename =~ m|^(.+)/[^/]+$|) {
5684: push @parts, split(/\//,$1);
5685: }
5686: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
5687: foreach my $part (@parts) {
5688: $path .= '/'.$part;
5689: if (!-e $path) {
5690: mkdir($path,0770);
5691: }
5692: }
5693: }
5694: open(FILE,">$file");
5695: print FILE $info;
5696: close(FILE);
5697: return 'ok';
5698: }
5699:
5700: sub tokenwrapper {
5701: my $uri=shift;
5702: $uri=~s|^http\://([^/]+)||;
5703: $uri=~s|^/||;
5704: $env{'user.environment'}=~/\/([^\/]+)\.id/;
5705: my $token=$1;
5706: my (undef,$udom,$uname,$file)=split('/',$uri,4);
5707: if ($udom && $uname && $file) {
5708: $file=~s|(\?\.*)*$||;
5709: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
5710: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
5711: (($uri=~/\?/)?'&':'?').'token='.$token.
5712: '&tokenissued='.$perlvar{'lonHostID'};
5713: } else {
5714: return '/adm/notfound.html';
5715: }
5716: }
5717:
5718: sub getuploaded {
5719: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5720: $uri=~s/^\///;
5721: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
5722: my $ua=new LWP::UserAgent;
5723: my $request=new HTTP::Request($reqtype,$uri);
5724: my $response=$ua->request($request);
5725: $$rtncode = $response->code;
5726: if (! $response->is_success()) {
5727: return 'failed';
5728: }
5729: if ($reqtype eq 'HEAD') {
5730: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
5731: } elsif ($reqtype eq 'GET') {
5732: $$info = $response->content;
5733: }
5734: return 'ok';
5735: }
5736:
5737: sub readfile {
5738: my $file = shift;
5739: if ( (! -e $file ) || ($file eq '') ) { return -1; };
5740: my $fh;
5741: open($fh,"<$file");
5742: my $a='';
5743: while (<$fh>) { $a .=$_; }
5744: return $a;
5745: }
5746:
5747: sub filelocation {
5748: my ($dir,$file) = @_;
5749: my $location;
5750: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
5751: if ($file=~m:^/~:) { # is a contruction space reference
5752: $location = $file;
5753: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
5754: } elsif ($file=~m:^/home/[^/]*/public_html/:) {
5755: # is a correct contruction space reference
5756: $location = $file;
5757: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
5758: my ($udom,$uname,$filename)=
5759: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
5760: my $home=&homeserver($uname,$udom);
5761: my $is_me=0;
5762: my @ids=¤t_machine_ids();
5763: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
5764: if ($is_me) {
5765: $location=&Apache::loncommon::propath($udom,$uname).
5766: '/userfiles/'.$filename;
5767: } else {
5768: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
5769: $udom.'/'.$uname.'/'.$filename;
5770: }
5771: } else {
5772: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5773: $file=~s:^/res/:/:;
5774: if ( !( $file =~ m:^/:) ) {
5775: $location = $dir. '/'.$file;
5776: } else {
5777: $location = '/home/httpd/html/res'.$file;
5778: }
5779: }
5780: $location=~s://+:/:g; # remove duplicate /
5781: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
5782: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
5783: return $location;
5784: }
5785:
5786: sub hreflocation {
5787: my ($dir,$file)=@_;
5788: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
5789: my $finalpath=filelocation($dir,$file);
5790: $finalpath=~s-^/home/httpd/html--;
5791: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
5792: return $finalpath;
5793: } elsif ($file=~m-^/home-) {
5794: $file=~s-^/home/httpd/html--;
5795: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
5796: return $file;
5797: }
5798: return $file;
5799: }
5800:
5801: sub current_machine_domains {
5802: my $hostname=$hostname{$perlvar{'lonHostID'}};
5803: my @domains;
5804: while( my($id, $name) = each(%hostname)) {
5805: # &logthis("-$id-$name-$hostname-");
5806: if ($hostname eq $name) {
5807: push(@domains,$hostdom{$id});
5808: }
5809: }
5810: return @domains;
5811: }
5812:
5813: sub current_machine_ids {
5814: my $hostname=$hostname{$perlvar{'lonHostID'}};
5815: my @ids;
5816: while( my($id, $name) = each(%hostname)) {
5817: # &logthis("-$id-$name-$hostname-");
5818: if ($hostname eq $name) {
5819: push(@ids,$id);
5820: }
5821: }
5822: return @ids;
5823: }
5824:
5825: # ------------------------------------------------------------- Declutters URLs
5826:
5827: sub declutter {
5828: my $thisfn=shift;
5829: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5830: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5831: $thisfn=~s/^\///;
5832: $thisfn=~s/^res\///;
5833: $thisfn=~s/\?.+$//;
5834: return $thisfn;
5835: }
5836:
5837: # ------------------------------------------------------------- Clutter up URLs
5838:
5839: sub clutter {
5840: my $thisfn='/'.&declutter(shift);
5841: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
5842: $thisfn='/res'.$thisfn;
5843: }
5844: return $thisfn;
5845: }
5846:
5847: sub freeze_escape {
5848: my ($value)=@_;
5849: if (ref($value)) {
5850: $value=&nfreeze($value);
5851: return '__FROZEN__'.&escape($value);
5852: }
5853: return &escape($value);
5854: }
5855:
5856: # -------------------------------------------------------- Escape Special Chars
5857:
5858: sub escape {
5859: my $str=shift;
5860: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
5861: return $str;
5862: }
5863:
5864: # ----------------------------------------------------- Un-Escape Special Chars
5865:
5866: sub unescape {
5867: my $str=shift;
5868: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
5869: return $str;
5870: }
5871:
5872: sub thaw_unescape {
5873: my ($value)=@_;
5874: if ($value =~ /^__FROZEN__/) {
5875: substr($value,0,10,undef);
5876: $value=&unescape($value);
5877: return &thaw($value);
5878: }
5879: return &unescape($value);
5880: }
5881:
5882: sub mod_perl_version {
5883: return 1;
5884: if (defined($perlvar{'MODPERL2'})) {
5885: return 2;
5886: }
5887: }
5888:
5889: sub correct_line_ends {
5890: my ($result)=@_;
5891: $$result =~s/\r\n/\n/mg;
5892: $$result =~s/\r/\n/mg;
5893: }
5894: # ================================================================ Main Program
5895:
5896: sub goodbye {
5897: &logthis("Starting Shut down");
5898: #not converted to using infrastruture and probably shouldn't be
5899: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
5900: #converted
5901: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
5902: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
5903: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
5904: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
5905: #1.1 only
5906: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
5907: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
5908: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
5909: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
5910: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
5911: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
5912: &logthis(sprintf("%-20s is %s",'hits',$hits));
5913: &flushcourselogs();
5914: &logthis("Shutting down");
5915: return DONE;
5916: }
5917:
5918: BEGIN {
5919: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
5920: unless ($readit) {
5921: {
5922: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
5923: open(my $config,"</etc/httpd/conf/loncapa.conf");
5924:
5925: while (my $configline=<$config>) {
5926: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
5927: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5928: chomp($varvalue);
5929: $perlvar{$varname}=$varvalue;
5930: }
5931: }
5932: close($config);
5933: }
5934: {
5935: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
5936:
5937: while (my $configline=<$config>) {
5938: if ($configline =~ /^[^\#]*PerlSetVar/) {
5939: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5940: chomp($varvalue);
5941: $perlvar{$varname}=$varvalue;
5942: }
5943: }
5944: close($config);
5945: }
5946:
5947: # ------------------------------------------------------------ Read domain file
5948: {
5949: %domaindescription = ();
5950: %domain_auth_def = ();
5951: %domain_auth_arg_def = ();
5952: my $fh;
5953: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
5954: while (<$fh>) {
5955: next if (/^(\#|\s*$)/);
5956: # next if /^\#/;
5957: chomp;
5958: my ($domain, $domain_description, $def_auth, $def_auth_arg,
5959: $def_lang, $city, $longi, $lati) = split(/:/,$_);
5960: $domain_auth_def{$domain}=$def_auth;
5961: $domain_auth_arg_def{$domain}=$def_auth_arg;
5962: $domaindescription{$domain}=$domain_description;
5963: $domain_lang_def{$domain}=$def_lang;
5964: $domain_city{$domain}=$city;
5965: $domain_longi{$domain}=$longi;
5966: $domain_lati{$domain}=$lati;
5967:
5968: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
5969: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
5970: }
5971: }
5972: close ($fh);
5973: }
5974:
5975:
5976: # ------------------------------------------------------------- Read hosts file
5977: {
5978: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
5979:
5980: while (my $configline=<$config>) {
5981: next if ($configline =~ /^(\#|\s*$)/);
5982: chomp($configline);
5983: my ($id,$domain,$role,$name)=split(/:/,$configline);
5984: $name=~s/\s//g;
5985: if ($id && $domain && $role && $name) {
5986: $hostname{$id}=$name;
5987: $hostdom{$id}=$domain;
5988: if ($role eq 'library') { $libserv{$id}=$name; }
5989: }
5990: }
5991: close($config);
5992: # FIXME: dev server don't want this, production servers _do_ want this
5993: #&get_iphost();
5994: }
5995:
5996: sub get_iphost {
5997: if (%iphost) { return %iphost; }
5998: my %name_to_ip;
5999: foreach my $id (keys(%hostname)) {
6000: my $name=$hostname{$id};
6001: my $ip;
6002: if (!exists($name_to_ip{$name})) {
6003: $ip = gethostbyname($name);
6004: if (!$ip || length($ip) ne 4) {
6005: &logthis("Skipping host $id name $name no IP found\n");
6006: next;
6007: }
6008: $ip=inet_ntoa($ip);
6009: $name_to_ip{$name} = $ip;
6010: } else {
6011: $ip = $name_to_ip{$name};
6012: }
6013: push(@{$iphost{$ip}},$id);
6014: }
6015: return %iphost;
6016: }
6017:
6018: # ------------------------------------------------------ Read spare server file
6019: {
6020: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
6021:
6022: while (my $configline=<$config>) {
6023: chomp($configline);
6024: if ($configline) {
6025: $spareid{$configline}=1;
6026: }
6027: }
6028: close($config);
6029: }
6030: # ------------------------------------------------------------ Read permissions
6031: {
6032: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
6033:
6034: while (my $configline=<$config>) {
6035: chomp($configline);
6036: if ($configline) {
6037: my ($role,$perm)=split(/ /,$configline);
6038: if ($perm ne '') { $pr{$role}=$perm; }
6039: }
6040: }
6041: close($config);
6042: }
6043:
6044: # -------------------------------------------- Read plain texts for permissions
6045: {
6046: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
6047:
6048: while (my $configline=<$config>) {
6049: chomp($configline);
6050: if ($configline) {
6051: my ($short,$plain)=split(/:/,$configline);
6052: if ($plain ne '') { $prp{$short}=$plain; }
6053: }
6054: }
6055: close($config);
6056: }
6057:
6058: # ---------------------------------------------------------- Read package table
6059: {
6060: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
6061:
6062: while (my $configline=<$config>) {
6063: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
6064: chomp($configline);
6065: my ($short,$plain)=split(/:/,$configline);
6066: my ($pack,$name)=split(/\&/,$short);
6067: if ($plain ne '') {
6068: $packagetab{$pack.'&'.$name.'&name'}=$name;
6069: $packagetab{$short}=$plain;
6070: }
6071: }
6072: close($config);
6073: }
6074:
6075: # ------------- set up temporary directory
6076: {
6077: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
6078:
6079: }
6080:
6081: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
6082:
6083: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
6084: $dumpcount=0;
6085:
6086: &logtouch();
6087: &logthis('<font color=yellow>INFO: Read configuration</font>');
6088: $readit=1;
6089: {
6090: use integer;
6091: my $test=(2**32)+1;
6092: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
6093: &logthis(" Detected 64bit platform ($_64bit)");
6094: }
6095: }
6096: }
6097:
6098: 1;
6099: __END__
6100:
6101: =pod
6102:
6103: =head1 NAME
6104:
6105: Apache::lonnet - Subroutines to ask questions about things in the network.
6106:
6107: =head1 SYNOPSIS
6108:
6109: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
6110:
6111: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
6112:
6113: Common parameters:
6114:
6115: =over 4
6116:
6117: =item *
6118:
6119: $uname : an internal username (if $cname expecting a course Id specifically)
6120:
6121: =item *
6122:
6123: $udom : a domain (if $cdom expecting a course's domain specifically)
6124:
6125: =item *
6126:
6127: $symb : a resource instance identifier
6128:
6129: =item *
6130:
6131: $namespace : the name of a .db file that contains the data needed or
6132: being set.
6133:
6134: =back
6135:
6136: =head1 OVERVIEW
6137:
6138: lonnet provides subroutines which interact with the
6139: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
6140: about classes, users, and resources.
6141:
6142: For many of these objects you can also use this to store data about
6143: them or modify them in various ways.
6144:
6145: =head2 Symbs
6146:
6147: To identify a specific instance of a resource, LON-CAPA uses symbols
6148: or "symbs"X<symb>. These identifiers are built from the URL of the
6149: map, the resource number of the resource in the map, and the URL of
6150: the resource itself. The latter is somewhat redundant, but might help
6151: if maps change.
6152:
6153: An example is
6154:
6155: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
6156:
6157: The respective map entry is
6158:
6159: <resource id="19" src="/res/msu/korte/tests/part12.problem"
6160: title="Problem 2">
6161: </resource>
6162:
6163: Symbs are used by the random number generator, as well as to store and
6164: restore data specific to a certain instance of for example a problem.
6165:
6166: =head2 Storing And Retrieving Data
6167:
6168: X<store()>X<cstore()>X<restore()>Three of the most important functions
6169: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
6170: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
6171: is is the non-critical message twin of cstore. These functions are for
6172: handlers to store a perl hash to a user's permanent data space in an
6173: easy manner, and to retrieve it again on another call. It is expected
6174: that a handler would use this once at the beginning to retrieve data,
6175: and then again once at the end to send only the new data back.
6176:
6177: The data is stored in the user's data directory on the user's
6178: homeserver under the ID of the course.
6179:
6180: The hash that is returned by restore will have all of the previous
6181: value for all of the elements of the hash.
6182:
6183: Example:
6184:
6185: #creating a hash
6186: my %hash;
6187: $hash{'foo'}='bar';
6188:
6189: #storing it
6190: &Apache::lonnet::cstore(\%hash);
6191:
6192: #changing a value
6193: $hash{'foo'}='notbar';
6194:
6195: #adding a new value
6196: $hash{'bar'}='foo';
6197: &Apache::lonnet::cstore(\%hash);
6198:
6199: #retrieving the hash
6200: my %history=&Apache::lonnet::restore();
6201:
6202: #print the hash
6203: foreach my $key (sort(keys(%history))) {
6204: print("\%history{$key} = $history{$key}");
6205: }
6206:
6207: Will print out:
6208:
6209: %history{1:foo} = bar
6210: %history{1:keys} = foo:timestamp
6211: %history{1:timestamp} = 990455579
6212: %history{2:bar} = foo
6213: %history{2:foo} = notbar
6214: %history{2:keys} = foo:bar:timestamp
6215: %history{2:timestamp} = 990455580
6216: %history{bar} = foo
6217: %history{foo} = notbar
6218: %history{timestamp} = 990455580
6219: %history{version} = 2
6220:
6221: Note that the special hash entries C<keys>, C<version> and
6222: C<timestamp> were added to the hash. C<version> will be equal to the
6223: total number of versions of the data that have been stored. The
6224: C<timestamp> attribute will be the UNIX time the hash was
6225: stored. C<keys> is available in every historical section to list which
6226: keys were added or changed at a specific historical revision of a
6227: hash.
6228:
6229: B<Warning>: do not store the hash that restore returns directly. This
6230: will cause a mess since it will restore the historical keys as if the
6231: were new keys. I.E. 1:foo will become 1:1:foo etc.
6232:
6233: Calling convention:
6234:
6235: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
6236: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
6237:
6238: For more detailed information, see lonnet specific documentation.
6239:
6240: =head1 RETURN MESSAGES
6241:
6242: =over 4
6243:
6244: =item * B<con_lost>: unable to contact remote host
6245:
6246: =item * B<con_delayed>: unable to contact remote host, message will be delivered
6247: when the connection is brought back up
6248:
6249: =item * B<con_failed>: unable to contact remote host and unable to save message
6250: for later delivery
6251:
6252: =item * B<error:>: an error a occured, a description of the error follows the :
6253:
6254: =item * B<no_such_host>: unable to fund a host associated with the user/domain
6255: that was requested
6256:
6257: =back
6258:
6259: =head1 PUBLIC SUBROUTINES
6260:
6261: =head2 Session Environment Functions
6262:
6263: =over 4
6264:
6265: =item *
6266: X<appenv()>
6267: B<appenv(%hash)>: the value of %hash is written to
6268: the user envirnoment file, and will be restored for each access this
6269: user makes during this session, also modifies the %env for the current
6270: process
6271:
6272: =item *
6273: X<delenv()>
6274: B<delenv($regexp)>: removes all items from the session
6275: environment file that matches the regular expression in $regexp. The
6276: values are also delted from the current processes %env.
6277:
6278: =back
6279:
6280: =head2 User Information
6281:
6282: =over 4
6283:
6284: =item *
6285: X<queryauthenticate()>
6286: B<queryauthenticate($uname,$udom)>: try to determine user's current
6287: authentication scheme
6288:
6289: =item *
6290: X<authenticate()>
6291: B<authenticate($uname,$upass,$udom)>: try to
6292: authenticate user from domain's lib servers (first use the current
6293: one). C<$upass> should be the users password.
6294:
6295: =item *
6296: X<homeserver()>
6297: B<homeserver($uname,$udom)>: find the server which has
6298: the user's directory and files (there must be only one), this caches
6299: the answer, and also caches if there is a borken connection.
6300:
6301: =item *
6302: X<idget()>
6303: B<idget($udom,@ids)>: find the usernames behind a list of IDs
6304: (IDs are a unique resource in a domain, there must be only 1 ID per
6305: username, and only 1 username per ID in a specific domain) (returns
6306: hash: id=>name,id=>name)
6307:
6308: =item *
6309: X<idrget()>
6310: B<idrget($udom,@unames)>: find the IDs behind a list of
6311: usernames (returns hash: name=>id,name=>id)
6312:
6313: =item *
6314: X<idput()>
6315: B<idput($udom,%ids)>: store away a list of names and associated IDs
6316:
6317: =item *
6318: X<rolesinit()>
6319: B<rolesinit($udom,$username,$authhost)>: get user privileges
6320:
6321: =item *
6322: X<getsection()>
6323: B<getsection($udom,$uname,$cname)>: finds the section of student in the
6324: course $cname, return section name/number or '' for "not in course"
6325: and '-1' for "no section"
6326:
6327: =item *
6328: X<userenvironment()>
6329: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
6330: passed in @what from the requested user's environment, returns a hash
6331:
6332: =back
6333:
6334: =head2 User Roles
6335:
6336: =over 4
6337:
6338: =item *
6339:
6340: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
6341: actions
6342: F: full access
6343: U,I,K: authentication modes (cxx only)
6344: '': forbidden
6345: 1: user needs to choose course
6346: 2: browse allowed
6347:
6348: =item *
6349:
6350: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
6351: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
6352: and course level
6353:
6354: =item *
6355:
6356: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
6357: explanation of a user role term
6358:
6359: =back
6360:
6361: =head2 User Modification
6362:
6363: =over 4
6364:
6365: =item *
6366:
6367: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
6368: user for the level given by URL. Optional start and end dates (leave empty
6369: string or zero for "no date")
6370:
6371: =item *
6372:
6373: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
6374: change a users, password, possible return values are: ok,
6375: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
6376: refused
6377:
6378: =item *
6379:
6380: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
6381:
6382: =item *
6383:
6384: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
6385: modify user
6386:
6387: =item *
6388:
6389: modifystudent
6390:
6391: modify a students enrollment and identification information.
6392: The course id is resolved based on the current users environment.
6393: This means the envoking user must be a course coordinator or otherwise
6394: associated with a course.
6395:
6396: This call is essentially a wrapper for lonnet::modifyuser and
6397: lonnet::modify_student_enrollment
6398:
6399: Inputs:
6400:
6401: =over 4
6402:
6403: =item B<$udom> Students loncapa domain
6404:
6405: =item B<$uname> Students loncapa login name
6406:
6407: =item B<$uid> Students id/student number
6408:
6409: =item B<$umode> Students authentication mode
6410:
6411: =item B<$upass> Students password
6412:
6413: =item B<$first> Students first name
6414:
6415: =item B<$middle> Students middle name
6416:
6417: =item B<$last> Students last name
6418:
6419: =item B<$gene> Students generation
6420:
6421: =item B<$usec> Students section in course
6422:
6423: =item B<$end> Unix time of the roles expiration
6424:
6425: =item B<$start> Unix time of the roles start date
6426:
6427: =item B<$forceid> If defined, allow $uid to be changed
6428:
6429: =item B<$desiredhome> server to use as home server for student
6430:
6431: =back
6432:
6433: =item *
6434:
6435: modify_student_enrollment
6436:
6437: Change a students enrollment status in a class. The environment variable
6438: 'role.request.course' must be defined for this function to proceed.
6439:
6440: Inputs:
6441:
6442: =over 4
6443:
6444: =item $udom, students domain
6445:
6446: =item $uname, students name
6447:
6448: =item $uid, students user id
6449:
6450: =item $first, students first name
6451:
6452: =item $middle
6453:
6454: =item $last
6455:
6456: =item $gene
6457:
6458: =item $usec
6459:
6460: =item $end
6461:
6462: =item $start
6463:
6464: =back
6465:
6466:
6467: =item *
6468:
6469: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
6470: custom role; give a custom role to a user for the level given by URL. Specify
6471: name and domain of role author, and role name
6472:
6473: =item *
6474:
6475: revokerole($udom,$uname,$url,$role) : revoke a role for url
6476:
6477: =item *
6478:
6479: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
6480:
6481: =back
6482:
6483: =head2 Course Infomation
6484:
6485: =over 4
6486:
6487: =item *
6488:
6489: coursedescription($courseid) : returns a hash of information about the
6490: specified course id, including all environment settings for the
6491: course, the description of the course will be in the hash under the
6492: key 'description'
6493:
6494: =item *
6495:
6496: resdata($name,$domain,$type,@which) : request for current parameter
6497: setting for a specific $type, where $type is either 'course' or 'user',
6498: @what should be a list of parameters to ask about. This routine caches
6499: answers for 5 minutes.
6500:
6501: =back
6502:
6503: =head2 Course Modification
6504:
6505: =over 4
6506:
6507: =item *
6508:
6509: writecoursepref($courseid,%prefs) : write preferences (environment
6510: database) for a course
6511:
6512: =item *
6513:
6514: createcourse($udom,$description,$url) : make/modify course
6515:
6516: =back
6517:
6518: =head2 Resource Subroutines
6519:
6520: =over 4
6521:
6522: =item *
6523:
6524: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
6525:
6526: =item *
6527:
6528: repcopy($filename) : subscribes to the requested file, and attempts to
6529: replicate from the owning library server, Might return
6530: 'unavailable', 'not_found', 'forbidden', 'ok', or
6531: 'bad_request', also attempts to grab the metadata for the
6532: resource. Expects the local filesystem pathname
6533: (/home/httpd/html/res/....)
6534:
6535: =back
6536:
6537: =head2 Resource Information
6538:
6539: =over 4
6540:
6541: =item *
6542:
6543: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
6544: a vairety of different possible values, $varname should be a request
6545: string, and the other parameters can be used to specify who and what
6546: one is asking about.
6547:
6548: Possible values for $varname are environment.lastname (or other item
6549: from the envirnment hash), user.name (or someother aspect about the
6550: user), resource.0.maxtries (or some other part and parameter of a
6551: resource)
6552:
6553: =item *
6554:
6555: directcondval($number) : get current value of a condition; reads from a state
6556: string
6557:
6558: =item *
6559:
6560: condval($condidx) : value of condition index based on state
6561:
6562: =item *
6563:
6564: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
6565: resource's metadata, $what should be either a specific key, or either
6566: 'keys' (to get a list of possible keys) or 'packages' to get a list of
6567: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
6568:
6569: this function automatically caches all requests
6570:
6571: =item *
6572:
6573: metadata_query($query,$custom,$customshow) : make a metadata query against the
6574: network of library servers; returns file handle of where SQL and regex results
6575: will be stored for query
6576:
6577: =item *
6578:
6579: symbread($filename) : return symbolic list entry (filename argument optional);
6580: returns the data handle
6581:
6582: =item *
6583:
6584: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
6585: a possible symb for the URL in $thisfn, and if is an encryypted
6586: resource that the user accessed using /enc/ returns a 1 on success, 0
6587: on failure, user must be in a course, as it assumes the existance of
6588: the course initial hash, and uses $env('request.course.id'}
6589:
6590:
6591: =item *
6592:
6593: symbclean($symb) : removes versions numbers from a symb, returns the
6594: cleaned symb
6595:
6596: =item *
6597:
6598: is_on_map($uri) : checks if the $uri is somewhere on the current
6599: course map, user must be in a course for it to work.
6600:
6601: =item *
6602:
6603: numval($salt) : return random seed value (addend for rndseed)
6604:
6605: =item *
6606:
6607: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
6608: a random seed, all arguments are optional, if they aren't sent it uses the
6609: environment to derive them. Note: if symb isn't sent and it can't get one
6610: from &symbread it will use the current time as its return value
6611:
6612: =item *
6613:
6614: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
6615: unfakeable, receipt
6616:
6617: =item *
6618:
6619: receipt() : API to ireceipt working off of env values; given out to users
6620:
6621: =item *
6622:
6623: countacc($url) : count the number of accesses to a given URL
6624:
6625: =item *
6626:
6627: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
6628:
6629: =item *
6630:
6631: checkin($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 $tcrsid)
6632:
6633: =item *
6634:
6635: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
6636:
6637: =item *
6638:
6639: devalidate($symb) : devalidate temporary spreadsheet calculations,
6640: forcing spreadsheet to reevaluate the resource scores next time.
6641:
6642: =back
6643:
6644: =head2 Storing/Retreiving Data
6645:
6646: =over 4
6647:
6648: =item *
6649:
6650: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
6651: for this url; hashref needs to be given and should be a \%hashname; the
6652: remaining args aren't required and if they aren't passed or are '' they will
6653: be derived from the env
6654:
6655: =item *
6656:
6657: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
6658: uses critical subroutine
6659:
6660: =item *
6661:
6662: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
6663: all args are optional
6664:
6665: =item *
6666:
6667: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
6668: works very similar to store/cstore, but all data is stored in a
6669: temporary location and can be reset using tmpreset, $storehash should
6670: be a hash reference, returns nothing on success
6671:
6672: =item *
6673:
6674: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
6675: similar to restore, but all data is stored in a temporary location and
6676: can be reset using tmpreset. Returns a hash of values on success,
6677: error string otherwise.
6678:
6679: =item *
6680:
6681: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
6682: deltes all keys for $symb form the temporary storage hash.
6683:
6684: =item *
6685:
6686: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6687: reference filled in from namesp ($udom and $uname are optional)
6688:
6689: =item *
6690:
6691: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
6692: namesp ($udom and $uname are optional)
6693:
6694: =item *
6695:
6696: dump($namespace,$udom,$uname,$regexp) :
6697: dumps the complete (or key matching regexp) namespace into a hash
6698: ($udom, $uname and $regexp are optional)
6699:
6700: =item *
6701:
6702: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
6703: $store can be a scalar, an array reference, or if the amount to be
6704: incremented is > 1, a hash reference.
6705:
6706: ($udom and $uname are optional)
6707:
6708: =item *
6709:
6710: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
6711: ($udom and $uname are optional)
6712:
6713: =item *
6714:
6715: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
6716: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
6717: used in records written by &store and retrieved by &restore. This function
6718: was created for use in editing discussion posts, without incrementing the
6719: version number included in the key for a particular post. The colon
6720: separated list of attribute names (e.g., the value associated with the key
6721: 1:keys:$symb) is also generated and passed in the ampersand separated
6722: items sent to lonnet::reply().
6723:
6724: =item *
6725:
6726: cput($namespace,$storehash,$udom,$uname) : critical put
6727: ($udom and $uname are optional)
6728:
6729: =item *
6730:
6731: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6732: reference filled in from namesp (encrypts the return communication)
6733: ($udom and $uname are optional)
6734:
6735: =item *
6736:
6737: log($udom,$name,$home,$message) : write to permanent log for user; use
6738: critical subroutine
6739:
6740: =back
6741:
6742: =head2 Network Status Functions
6743:
6744: =over 4
6745:
6746: =item *
6747:
6748: dirlist($uri) : return directory list based on URI
6749:
6750: =item *
6751:
6752: spareserver() : find server with least workload from spare.tab
6753:
6754: =back
6755:
6756: =head2 Apache Request
6757:
6758: =over 4
6759:
6760: =item *
6761:
6762: ssi($url,%hash) : server side include, does a complete request cycle on url to
6763: localhost, posts hash
6764:
6765: =back
6766:
6767: =head2 Data to String to Data
6768:
6769: =over 4
6770:
6771: =item *
6772:
6773: hash2str(%hash) : convert a hash into a string complete with escaping and '='
6774: and '&' separators, supports elements that are arrayrefs and hashrefs
6775:
6776: =item *
6777:
6778: hashref2str($hashref) : convert a hashref into a string complete with
6779: escaping and '=' and '&' separators, supports elements that are
6780: arrayrefs and hashrefs
6781:
6782: =item *
6783:
6784: arrayref2str($arrayref) : convert an arrayref into a string complete
6785: with escaping and '&' separators, supports elements that are arrayrefs
6786: and hashrefs
6787:
6788: =item *
6789:
6790: str2hash($string) : convert string to hash using unescaping and
6791: splitting on '=' and '&', supports elements that are arrayrefs and
6792: hashrefs
6793:
6794: =item *
6795:
6796: str2array($string) : convert string to hash using unescaping and
6797: splitting on '&', supports elements that are arrayrefs and hashrefs
6798:
6799: =back
6800:
6801: =head2 Logging Routines
6802:
6803: =over 4
6804:
6805: These routines allow one to make log messages in the lonnet.log and
6806: lonnet.perm logfiles.
6807:
6808: =item *
6809:
6810: logtouch() : make sure the logfile, lonnet.log, exists
6811:
6812: =item *
6813:
6814: logthis() : append message to the normal lonnet.log file, it gets
6815: preiodically rolled over and deleted.
6816:
6817: =item *
6818:
6819: logperm() : append a permanent message to lonnet.perm.log, this log
6820: file never gets deleted by any automated portion of the system, only
6821: messages of critical importance should go in here.
6822:
6823: =back
6824:
6825: =head2 General File Helper Routines
6826:
6827: =over 4
6828:
6829: =item *
6830:
6831: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
6832: (a) files in /uploaded
6833: (i) If a local copy of the file exists -
6834: compares modification date of local copy with last-modified date for
6835: definitive version stored on home server for course. If local copy is
6836: stale, requests a new version from the home server and stores it.
6837: If the original has been removed from the home server, then local copy
6838: is unlinked.
6839: (ii) If local copy does not exist -
6840: requests the file from the home server and stores it.
6841:
6842: If $caller is 'uploadrep':
6843: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
6844: for request for files originally uploaded via DOCS.
6845: - returns 'ok' if fresh local copy now available, -1 otherwise.
6846:
6847: Otherwise:
6848: This indicates a call from the content generation phase of the request.
6849: - returns the entire contents of the file or -1.
6850:
6851: (b) files in /res
6852: - returns the entire contents of a file or -1;
6853: it properly subscribes to and replicates the file if neccessary.
6854:
6855: =item *
6856:
6857: filelocation($dir,$file) : returns file system location of a file
6858: based on URI; meant to be "fairly clean" absolute reference, $dir is a
6859: directory that relative $file lookups are to looked in ($dir of /a/dir
6860: and a file of ../bob will become /a/bob)
6861:
6862: =item *
6863:
6864: hreflocation($dir,$file) : returns file system location or a URL; same as
6865: filelocation except for hrefs
6866:
6867: =item *
6868:
6869: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
6870:
6871: =back
6872:
6873: =head2 Usererfile file routines (/uploaded*)
6874:
6875: =over 4
6876:
6877: =item *
6878:
6879: userfileupload(): main rotine for putting a file in a user or course's
6880: filespace, arguments are,
6881:
6882: formname - required - this is the name of the element in $env where the
6883: filename, and the contents of the file to create/modifed exist
6884: the filename is in $env{'form.'.$formname.'.filename'} and the
6885: contents of the file is located in $env{'form.'.$formname}
6886: coursedoc - if true, store the file in the course of the active role
6887: of the current user
6888: subdir - required - subdirectory to put the file in under ../userfiles/
6889: if undefined, it will be placed in "unknown"
6890:
6891: (This routine calls clean_filename() to remove any dangerous
6892: characters from the filename, and then calls finuserfileupload() to
6893: complete the transaction)
6894:
6895: returns either the url of the uploaded file (/uploaded/....) if successful
6896: and /adm/notfound.html if unsuccessful
6897:
6898: =item *
6899:
6900: clean_filename(): routine for cleaing a filename up for storage in
6901: userfile space, argument is:
6902:
6903: filename - proposed filename
6904:
6905: returns: the new clean filename
6906:
6907: =item *
6908:
6909: finishuserfileupload(): routine that creaes and sends the file to
6910: userspace, probably shouldn't be called directly
6911:
6912: docuname: username or courseid of destination for the file
6913: docudom: domain of user/course of destination for the file
6914: formname: same as for userfileupload()
6915: fname: filename (inculding subdirectories) for the file
6916:
6917: returns either the url of the uploaded file (/uploaded/....) if successful
6918: and /adm/notfound.html if unsuccessful
6919:
6920: =item *
6921:
6922: renameuserfile(): renames an existing userfile to a new name
6923:
6924: Args:
6925: docuname: username or courseid of destination for the file
6926: docudom: domain of user/course of destination for the file
6927: old: current file name (including any subdirs under userfiles)
6928: new: desired file name (including any subdirs under userfiles)
6929:
6930: =item *
6931:
6932: mkdiruserfile(): creates a directory is a userfiles dir
6933:
6934: Args:
6935: docuname: username or courseid of destination for the file
6936: docudom: domain of user/course of destination for the file
6937: dir: dir to create (including any subdirs under userfiles)
6938:
6939: =item *
6940:
6941: removeuserfile(): removes a file that exists in userfiles
6942:
6943: Args:
6944: docuname: username or courseid of destination for the file
6945: docudom: domain of user/course of destination for the file
6946: fname: filname to delete (including any subdirs under userfiles)
6947:
6948: =item *
6949:
6950: removeuploadedurl(): convience function for removeuserfile()
6951:
6952: Args:
6953: url: a full /uploaded/... url to delete
6954:
6955: =back
6956:
6957: =head2 HTTP Helper Routines
6958:
6959: =over 4
6960:
6961: =item *
6962:
6963: escape() : unpack non-word characters into CGI-compatible hex codes
6964:
6965: =item *
6966:
6967: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
6968:
6969: =back
6970:
6971: =head1 PRIVATE SUBROUTINES
6972:
6973: =head2 Underlying communication routines (Shouldn't call)
6974:
6975: =over 4
6976:
6977: =item *
6978:
6979: subreply() : tries to pass a message to lonc, returns con_lost if incapable
6980:
6981: =item *
6982:
6983: reply() : uses subreply to send a message to remote machine, logs all failures
6984:
6985: =item *
6986:
6987: critical() : passes a critical message to another server; if cannot
6988: get through then place message in connection buffer directory and
6989: returns con_delayed, if incapable of saving message, returns
6990: con_failed
6991:
6992: =item *
6993:
6994: reconlonc() : tries to reconnect lonc client processes.
6995:
6996: =back
6997:
6998: =head2 Resource Access Logging
6999:
7000: =over 4
7001:
7002: =item *
7003:
7004: flushcourselogs() : flush (save) buffer logs and access logs
7005:
7006: =item *
7007:
7008: courselog($what) : save message for course in hash
7009:
7010: =item *
7011:
7012: courseacclog($what) : save message for course using &courselog(). Perform
7013: special processing for specific resource types (problems, exams, quizzes, etc).
7014:
7015: =item *
7016:
7017: goodbye() : flush course logs and log shutting down; it is called in srm.conf
7018: as a PerlChildExitHandler
7019:
7020: =back
7021:
7022: =head2 Other
7023:
7024: =over 4
7025:
7026: =item *
7027:
7028: symblist($mapname,%newhash) : update symbolic storage links
7029:
7030: =back
7031:
7032: =cut
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