1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.634 2005/05/05 20:55:04 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 $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 Fcntl qw(:flock);
51: use Apache::lonlocal;
52: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
53: use Time::HiRes qw( gettimeofday tv_interval );
54: use Cache::Memcached;
55: my $readit;
56: my $max_connection_retries = 10; # Or some such value.
57:
58: require Exporter;
59:
60: our @ISA = qw (Exporter);
61: our @EXPORT = qw(%env);
62:
63: =pod
64:
65: =head1 Package Variables
66:
67: These are largely undocumented, so if you decipher one please note it here.
68:
69: =over 4
70:
71: =item $processmarker
72:
73: Contains the time this process was started and this servers host id.
74:
75: =item $dumpcount
76:
77: Counts the number of times a message log flush has been attempted (regardless
78: of success) by this process. Used as part of the filename when messages are
79: delayed.
80:
81: =back
82:
83: =cut
84:
85:
86: # --------------------------------------------------------------------- Logging
87:
88: sub logtouch {
89: my $execdir=$perlvar{'lonDaemons'};
90: unless (-e "$execdir/logs/lonnet.log") {
91: open(my $fh,">>$execdir/logs/lonnet.log");
92: close $fh;
93: }
94: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
95: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
96: }
97:
98: sub logthis {
99: my $message=shift;
100: my $execdir=$perlvar{'lonDaemons'};
101: my $now=time;
102: my $local=localtime($now);
103: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
104: print $fh "$local ($$): $message\n";
105: close($fh);
106: }
107: return 1;
108: }
109:
110: sub logperm {
111: my $message=shift;
112: my $execdir=$perlvar{'lonDaemons'};
113: my $now=time;
114: my $local=localtime($now);
115: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
116: print $fh "$now:$message:$local\n";
117: close($fh);
118: }
119: return 1;
120: }
121:
122: # -------------------------------------------------- Non-critical communication
123: sub subreply {
124: my ($cmd,$server)=@_;
125: my $peerfile="$perlvar{'lonSockDir'}/$server";
126: #
127: # With loncnew process trimming, there's a timing hole between lonc server
128: # process exit and the master server picking up the listen on the AF_UNIX
129: # socket. In that time interval, a lock file will exist:
130:
131: my $lockfile=$peerfile.".lock";
132: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
133: sleep(1);
134: }
135: # At this point, either a loncnew parent is listening or an old lonc
136: # or loncnew child is listening so we can connect or everything's dead.
137: #
138: # We'll give the connection a few tries before abandoning it. If
139: # connection is not possible, we'll con_lost back to the client.
140: #
141: my $client;
142: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
143: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
144: Type => SOCK_STREAM,
145: Timeout => 10);
146: if($client) {
147: last; # Connected!
148: }
149: sleep(1); # Try again later if failed connection.
150: }
151: my $answer;
152: if ($client) {
153: print $client "$cmd\n";
154: $answer=<$client>;
155: if (!$answer) { $answer="con_lost"; }
156: chomp($answer);
157: } else {
158: $answer = 'con_lost'; # Failed connection.
159: }
160: return $answer;
161: }
162:
163: sub reply {
164: my ($cmd,$server)=@_;
165: unless (defined($hostname{$server})) { return 'no_such_host'; }
166: my $answer=subreply($cmd,$server);
167: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
168: &logthis("<font color=blue>WARNING:".
169: " $cmd to $server returned $answer</font>");
170: }
171: return $answer;
172: }
173:
174: # ----------------------------------------------------------- Send USR1 to lonc
175:
176: sub reconlonc {
177: my $peerfile=shift;
178: &logthis("Trying to reconnect for $peerfile");
179: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
180: if (open(my $fh,"<$loncfile")) {
181: my $loncpid=<$fh>;
182: chomp($loncpid);
183: if (kill 0 => $loncpid) {
184: &logthis("lonc at pid $loncpid responding, sending USR1");
185: kill USR1 => $loncpid;
186: sleep 1;
187: if (-e "$peerfile") { return; }
188: &logthis("$peerfile still not there, give it another try");
189: sleep 5;
190: if (-e "$peerfile") { return; }
191: &logthis(
192: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
193: } else {
194: &logthis(
195: "<font color=blue>WARNING:".
196: " lonc at pid $loncpid not responding, giving up</font>");
197: }
198: } else {
199: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
200: }
201: }
202:
203: # ------------------------------------------------------ Critical communication
204:
205: sub critical {
206: my ($cmd,$server)=@_;
207: unless ($hostname{$server}) {
208: &logthis("<font color=blue>WARNING:".
209: " Critical message to unknown server ($server)</font>");
210: return 'no_such_host';
211: }
212: my $answer=reply($cmd,$server);
213: if ($answer eq 'con_lost') {
214: &reconlonc("$perlvar{'lonSockDir'}/$server");
215: my $answer=reply($cmd,$server);
216: if ($answer eq 'con_lost') {
217: my $now=time;
218: my $middlename=$cmd;
219: $middlename=substr($middlename,0,16);
220: $middlename=~s/\W//g;
221: my $dfilename=
222: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
223: $dumpcount++;
224: {
225: my $dfh;
226: if (open($dfh,">$dfilename")) {
227: print $dfh "$cmd\n";
228: close($dfh);
229: }
230: }
231: sleep 2;
232: my $wcmd='';
233: {
234: my $dfh;
235: if (open($dfh,"<$dfilename")) {
236: $wcmd=<$dfh>;
237: close($dfh);
238: }
239: }
240: chomp($wcmd);
241: if ($wcmd eq $cmd) {
242: &logthis("<font color=blue>WARNING: ".
243: "Connection buffer $dfilename: $cmd</font>");
244: &logperm("D:$server:$cmd");
245: return 'con_delayed';
246: } else {
247: &logthis("<font color=red>CRITICAL:"
248: ." Critical connection failed: $server $cmd</font>");
249: &logperm("F:$server:$cmd");
250: return 'con_failed';
251: }
252: }
253: }
254: return $answer;
255: }
256:
257: # ------------------------------------------- Transfer profile into environment
258:
259: sub transfer_profile_to_env {
260: my ($lonidsdir,$handle)=@_;
261: undef(%env);
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:
771: sub getsection {
772: my ($udom,$unam,$courseid)=@_;
773: my $cachetime=1800;
774: $courseid=~s/\_/\//g;
775: $courseid=~s/^(\w)/\/$1/;
776:
777: my $hashid="$udom:$unam:$courseid";
778: my ($result,$cached)=&is_cached_new('getsection',$hashid);
779: if (defined($cached)) { return $result; }
780:
781: my %Pending;
782: my %Expired;
783: #
784: # Each role can either have not started yet (pending), be active,
785: # or have expired.
786: #
787: # If there is an active role, we are done.
788: #
789: # If there is more than one role which has not started yet,
790: # choose the one which will start sooner
791: # If there is one role which has not started yet, return it.
792: #
793: # If there is more than one expired role, choose the one which ended last.
794: # If there is a role which has expired, return it.
795: #
796: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
797: &homeserver($unam,$udom)))) {
798: my ($key,$value)=split(/\=/,$_);
799: $key=&unescape($key);
800: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
801: my $section=$1;
802: if ($key eq $courseid.'_st') { $section=''; }
803: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
804: my $now=time;
805: if (defined($end) && $end && ($now > $end)) {
806: $Expired{$end}=$section;
807: next;
808: }
809: if (defined($start) && $start && ($now < $start)) {
810: $Pending{$start}=$section;
811: next;
812: }
813: return &do_cache_new('getsection',$hashid,$section,$cachetime);
814: }
815: #
816: # Presumedly there will be few matching roles from the above
817: # loop and the sorting time will be negligible.
818: if (scalar(keys(%Pending))) {
819: my ($time) = sort {$a <=> $b} keys(%Pending);
820: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
821: }
822: if (scalar(keys(%Expired))) {
823: my @sorted = sort {$a <=> $b} keys(%Expired);
824: my $time = pop(@sorted);
825: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
826: }
827: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
828: }
829:
830: sub save_cache {
831: my ($r)=@_;
832: if (! $r->is_initial_req()) { return DECLINED; }
833: &purge_remembered();
834: undef(%env);
835: return OK;
836: }
837:
838: my $to_remember=-1;
839: my %remembered;
840: my %accessed;
841: my $kicks=0;
842: my $hits=0;
843: sub devalidate_cache_new {
844: my ($name,$id,$debug) = @_;
845: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
846: $id=&escape($name.':'.$id);
847: $memcache->delete($id);
848: delete($remembered{$id});
849: delete($accessed{$id});
850: }
851:
852: sub is_cached_new {
853: my ($name,$id,$debug) = @_;
854: $id=&escape($name.':'.$id);
855: if (exists($remembered{$id})) {
856: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
857: $accessed{$id}=[&gettimeofday()];
858: $hits++;
859: return ($remembered{$id},1);
860: }
861: my $value = $memcache->get($id);
862: if (!(defined($value))) {
863: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
864: return (undef,undef);
865: }
866: if ($value eq '__undef__') {
867: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
868: $value=undef;
869: }
870: &make_room($id,$value,$debug);
871: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
872: return ($value,1);
873: }
874:
875: sub do_cache_new {
876: my ($name,$id,$value,$time,$debug) = @_;
877: $id=&escape($name.':'.$id);
878: my $setvalue=$value;
879: if (!defined($setvalue)) {
880: $setvalue='__undef__';
881: }
882: if (!defined($time) ) {
883: $time=600;
884: }
885: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
886: $memcache->set($id,$setvalue,$time);
887: # need to make a copy of $value
888: #&make_room($id,$value,$debug);
889: return $value;
890: }
891:
892: sub make_room {
893: my ($id,$value,$debug)=@_;
894: $remembered{$id}=$value;
895: if ($to_remember<0) { return; }
896: $accessed{$id}=[&gettimeofday()];
897: if (scalar(keys(%remembered)) <= $to_remember) { return; }
898: my $to_kick;
899: my $max_time=0;
900: foreach my $other (keys(%accessed)) {
901: if (&tv_interval($accessed{$other}) > $max_time) {
902: $to_kick=$other;
903: $max_time=&tv_interval($accessed{$other});
904: }
905: }
906: delete($remembered{$to_kick});
907: delete($accessed{$to_kick});
908: $kicks++;
909: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
910: return;
911: }
912:
913: sub purge_remembered {
914: #&logthis("Tossing ".scalar(keys(%remembered)));
915: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
916: undef(%remembered);
917: undef(%accessed);
918: }
919: # ------------------------------------- Read an entry from a user's environment
920:
921: sub userenvironment {
922: my ($udom,$unam,@what)=@_;
923: my %returnhash=();
924: my @answer=split(/\&/,
925: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
926: &homeserver($unam,$udom)));
927: my $i;
928: for ($i=0;$i<=$#what;$i++) {
929: $returnhash{$what[$i]}=&unescape($answer[$i]);
930: }
931: return %returnhash;
932: }
933:
934: # ---------------------------------------------------------- Get a studentphoto
935: sub studentphoto {
936: my ($udom,$unam,$ext) = @_;
937: my $home=&Apache::lonnet::homeserver($unam,$udom);
938: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext",$home);
939: my $url="/uploaded/$udom/$unam/internal/studentphoto.".$ext;
940: if ($ret ne 'ok') {
941: return '/adm/lonKaputt/lonlogo_broken.gif';
942: }
943: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
944: return $tokenurl;
945: }
946:
947: # -------------------------------------------------------------------- New chat
948:
949: sub chatsend {
950: my ($newentry,$anon)=@_;
951: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
952: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
953: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
954: &reply('chatsend:'.$cdom.':'.$cnum.':'.
955: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
956: &escape($newentry)),$chome);
957: }
958:
959: # ------------------------------------------ Find current version of a resource
960:
961: sub getversion {
962: my $fname=&clutter(shift);
963: unless ($fname=~/^\/res\//) { return -1; }
964: return ¤tversion(&filelocation('',$fname));
965: }
966:
967: sub currentversion {
968: my $fname=shift;
969: my ($result,$cached)=&is_cached_new('resversion',$fname);
970: if (defined($cached)) { return $result; }
971: my $author=$fname;
972: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
973: my ($udom,$uname)=split(/\//,$author);
974: my $home=homeserver($uname,$udom);
975: if ($home eq 'no_host') {
976: return -1;
977: }
978: my $answer=reply("currentversion:$fname",$home);
979: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
980: return -1;
981: }
982: return &do_cache_new('resversion',$fname,$answer,600);
983: }
984:
985: # ----------------------------- Subscribe to a resource, return URL if possible
986:
987: sub subscribe {
988: my $fname=shift;
989: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
990: $fname=~s/[\n\r]//g;
991: my $author=$fname;
992: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
993: my ($udom,$uname)=split(/\//,$author);
994: my $home=homeserver($uname,$udom);
995: if ($home eq 'no_host') {
996: return 'not_found';
997: }
998: my $answer=reply("sub:$fname",$home);
999: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1000: $answer.=' by '.$home;
1001: }
1002: return $answer;
1003: }
1004:
1005: # -------------------------------------------------------------- Replicate file
1006:
1007: sub repcopy {
1008: my $filename=shift;
1009: $filename=~s/\/+/\//g;
1010: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1011: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1012: if ($filename=~m|^/home/httpd/html/userfiles/| or
1013: $filename=~m -^/*(uploaded|editupload)/-) {
1014: return &repcopy_userfile($filename);
1015: }
1016: $filename=~s/[\n\r]//g;
1017: my $transname="$filename.in.transfer";
1018: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1019: my $remoteurl=subscribe($filename);
1020: if ($remoteurl =~ /^con_lost by/) {
1021: &logthis("Subscribe returned $remoteurl: $filename");
1022: return 'unavailable';
1023: } elsif ($remoteurl eq 'not_found') {
1024: #&logthis("Subscribe returned not_found: $filename");
1025: return 'not_found';
1026: } elsif ($remoteurl =~ /^rejected by/) {
1027: &logthis("Subscribe returned $remoteurl: $filename");
1028: return 'forbidden';
1029: } elsif ($remoteurl eq 'directory') {
1030: return 'ok';
1031: } else {
1032: my $author=$filename;
1033: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1034: my ($udom,$uname)=split(/\//,$author);
1035: my $home=homeserver($uname,$udom);
1036: unless ($home eq $perlvar{'lonHostID'}) {
1037: my @parts=split(/\//,$filename);
1038: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1039: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1040: &logthis("Malconfiguration for replication: $filename");
1041: return 'bad_request';
1042: }
1043: my $count;
1044: for ($count=5;$count<$#parts;$count++) {
1045: $path.="/$parts[$count]";
1046: if ((-e $path)!=1) {
1047: mkdir($path,0777);
1048: }
1049: }
1050: my $ua=new LWP::UserAgent;
1051: my $request=new HTTP::Request('GET',"$remoteurl");
1052: my $response=$ua->request($request,$transname);
1053: if ($response->is_error()) {
1054: unlink($transname);
1055: my $message=$response->status_line;
1056: &logthis("<font color=blue>WARNING:"
1057: ." LWP get: $message: $filename</font>");
1058: return 'unavailable';
1059: } else {
1060: if ($remoteurl!~/\.meta$/) {
1061: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1062: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1063: if ($mresponse->is_error()) {
1064: unlink($filename.'.meta');
1065: &logthis(
1066: "<font color=yellow>INFO: No metadata: $filename</font>");
1067: }
1068: }
1069: rename($transname,$filename);
1070: return 'ok';
1071: }
1072: }
1073: }
1074: }
1075:
1076: # ------------------------------------------------ Get server side include body
1077: sub ssi_body {
1078: my ($filelink,%form)=@_;
1079: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1080: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1081: }
1082: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1083: &ssi($filelink,%form));
1084: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1085: $output=~s/^.*?\<body[^\>]*\>//si;
1086: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1087: return $output;
1088: }
1089:
1090: # --------------------------------------------------------- Server Side Include
1091:
1092: sub ssi {
1093:
1094: my ($fn,%form)=@_;
1095:
1096: my $ua=new LWP::UserAgent;
1097:
1098: my $request;
1099:
1100: if (%form) {
1101: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1102: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1103: } else {
1104: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1105: }
1106:
1107: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1108: my $response=$ua->request($request);
1109:
1110: return $response->content;
1111: }
1112:
1113: sub externalssi {
1114: my ($url)=@_;
1115: my $ua=new LWP::UserAgent;
1116: my $request=new HTTP::Request('GET',$url);
1117: my $response=$ua->request($request);
1118: return $response->content;
1119: }
1120:
1121: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1122:
1123: sub allowuploaded {
1124: my ($srcurl,$url)=@_;
1125: $url=&clutter(&declutter($url));
1126: my $dir=$url;
1127: $dir=~s/\/[^\/]+$//;
1128: my %httpref=();
1129: my $httpurl=&hreflocation('',$url);
1130: $httpref{'httpref.'.$httpurl}=$srcurl;
1131: &Apache::lonnet::appenv(%httpref);
1132: }
1133:
1134: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1135: # input: action, courseID, current domain, home server for course, intended
1136: # path to file, source of file.
1137: # output: url to file (if action was uploaddoc),
1138: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1139: #
1140: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1141: # course.
1142: #
1143: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1144: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1145: # course's home server.
1146: #
1147: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1148: # be copied from $source (current location) to
1149: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1150: # and will then be copied to
1151: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1152: # course's home server.
1153: #
1154: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1155: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1156: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1157: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1158: # in course's home server.
1159:
1160:
1161: sub process_coursefile {
1162: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1163: my $fetchresult;
1164: if ($action eq 'propagate') {
1165: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1166: ,$docuhome);
1167: } else {
1168: my $fetchresult = '';
1169: my $fpath = '';
1170: my $fname = $file;
1171: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1172: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1173: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1174: unless ($fpath eq '') {
1175: my @parts=split('/',$fpath);
1176: foreach my $part (@parts) {
1177: $filepath.= '/'.$part;
1178: if ((-e $filepath)!=1) {
1179: mkdir($filepath,0777);
1180: }
1181: }
1182: }
1183: if ($action eq 'copy') {
1184: if ($source eq '') {
1185: $fetchresult = 'no source file';
1186: return $fetchresult;
1187: } else {
1188: my $destination = $filepath.'/'.$fname;
1189: rename($source,$destination);
1190: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1191: $docuhome);
1192: }
1193: } elsif ($action eq 'uploaddoc') {
1194: open(my $fh,'>'.$filepath.'/'.$fname);
1195: print $fh $env{'form.'.$source};
1196: close($fh);
1197: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1198: $docuhome);
1199: if ($fetchresult eq 'ok') {
1200: return '/uploaded/'.$fpath.'/'.$fname;
1201: } else {
1202: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1203: ' to host '.$docuhome.': '.$fetchresult);
1204: return '/adm/notfound.html';
1205: }
1206: }
1207: }
1208: unless ( $fetchresult eq 'ok') {
1209: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1210: ' to host '.$docuhome.': '.$fetchresult);
1211: }
1212: return $fetchresult;
1213: }
1214:
1215: sub clean_filename {
1216: my ($fname)=@_;
1217: # Replace Windows backslashes by forward slashes
1218: $fname=~s/\\/\//g;
1219: # Get rid of everything but the actual filename
1220: $fname=~s/^.*\/([^\/]+)$/$1/;
1221: # Replace spaces by underscores
1222: $fname=~s/\s+/\_/g;
1223: # Replace all other weird characters by nothing
1224: $fname=~s/[^\w\.\-]//g;
1225: # Replace all .\d. sequences with _\d. so they no longer look like version
1226: # numbers
1227: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1228: return $fname;
1229: }
1230:
1231: # --------------- Take an uploaded file and put it into the userfiles directory
1232: # input: name of form element, coursedoc=1 means this is for the course
1233: # output: url of file in userspace
1234:
1235:
1236: sub userfileupload {
1237: my ($formname,$coursedoc,$subdir)=@_;
1238: if (!defined($subdir)) { $subdir='unknown'; }
1239: my $fname=$env{'form.'.$formname.'.filename'};
1240: $fname=&clean_filename($fname);
1241: # See if there is anything left
1242: unless ($fname) { return 'error: no uploaded file'; }
1243: chop($env{'form.'.$formname});
1244: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1245: my $now = time;
1246: my $filepath = 'tmp/helprequests/'.$now;
1247: my @parts=split(/\//,$filepath);
1248: my $fullpath = $perlvar{'lonDaemons'};
1249: for (my $i=0;$i<@parts;$i++) {
1250: $fullpath .= '/'.$parts[$i];
1251: if ((-e $fullpath)!=1) {
1252: mkdir($fullpath,0777);
1253: }
1254: }
1255: open(my $fh,'>'.$fullpath.'/'.$fname);
1256: print $fh $env{'form.'.$formname};
1257: close($fh);
1258: return $fullpath.'/'.$fname;
1259: }
1260: # Create the directory if not present
1261: my $docuname='';
1262: my $docudom='';
1263: my $docuhome='';
1264: $fname="$subdir/$fname";
1265: if ($coursedoc) {
1266: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1267: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1268: $docuhome=$env{'course.'.$env{'request.course.id'}.'.home'};
1269: if ($env{'form.folder'} =~ m/^default/) {
1270: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1271: } else {
1272: $fname=$env{'form.folder'}.'/'.$fname;
1273: return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1274: }
1275: } else {
1276: $docuname=$env{'user.name'};
1277: $docudom=$env{'user.domain'};
1278: $docuhome=$env{'user.home'};
1279: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1280: }
1281: }
1282:
1283: sub finishuserfileupload {
1284: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1285: my $path=$docudom.'/'.$docuname.'/';
1286: my $filepath=$perlvar{'lonDocRoot'};
1287: my ($fnamepath,$file);
1288: $file=$fname;
1289: if ($fname=~m|/|) {
1290: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1291: $path.=$fnamepath.'/';
1292: }
1293: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1294: my $count;
1295: for ($count=4;$count<=$#parts;$count++) {
1296: $filepath.="/$parts[$count]";
1297: if ((-e $filepath)!=1) {
1298: mkdir($filepath,0777);
1299: }
1300: }
1301: # Save the file
1302: {
1303: open(FH,'>'.$filepath.'/'.$file);
1304: print FH $env{'form.'.$formname};
1305: close(FH);
1306: }
1307: # Notify homeserver to grep it
1308: #
1309: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1310: if ($fetchresult eq 'ok') {
1311: #
1312: # Return the URL to it
1313: return '/uploaded/'.$path.$file;
1314: } else {
1315: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1316: ': '.$fetchresult);
1317: return '/adm/notfound.html';
1318: }
1319: }
1320:
1321: sub removeuploadedurl {
1322: my ($url)=@_;
1323: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1324: return &removeuserfile($uname,$udom,$fname);
1325: }
1326:
1327: sub removeuserfile {
1328: my ($docuname,$docudom,$fname)=@_;
1329: my $home=&homeserver($docuname,$docudom);
1330: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1331: }
1332:
1333: sub mkdiruserfile {
1334: my ($docuname,$docudom,$dir)=@_;
1335: my $home=&homeserver($docuname,$docudom);
1336: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1337: }
1338:
1339: sub renameuserfile {
1340: my ($docuname,$docudom,$old,$new)=@_;
1341: my $home=&homeserver($docuname,$docudom);
1342: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1343: &escape("$new"),$home);
1344: }
1345:
1346: # ------------------------------------------------------------------------- Log
1347:
1348: sub log {
1349: my ($dom,$nam,$hom,$what)=@_;
1350: return critical("log:$dom:$nam:$what",$hom);
1351: }
1352:
1353: # ------------------------------------------------------------------ Course Log
1354: #
1355: # This routine flushes several buffers of non-mission-critical nature
1356: #
1357:
1358: sub flushcourselogs {
1359: &logthis('Flushing log buffers');
1360: #
1361: # course logs
1362: # This is a log of all transactions in a course, which can be used
1363: # for data mining purposes
1364: #
1365: # It also collects the courseid database, which lists last transaction
1366: # times and course titles for all courseids
1367: #
1368: my %courseidbuffer=();
1369: foreach (keys %courselogs) {
1370: my $crsid=$_;
1371: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1372: &escape($courselogs{$crsid}),
1373: $coursehombuf{$crsid}) eq 'ok') {
1374: delete $courselogs{$crsid};
1375: } else {
1376: &logthis('Failed to flush log buffer for '.$crsid);
1377: if (length($courselogs{$crsid})>40000) {
1378: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1379: " exceeded maximum size, deleting.</font>");
1380: delete $courselogs{$crsid};
1381: }
1382: }
1383: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1384: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1385: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1386: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1387: } else {
1388: $courseidbuffer{$coursehombuf{$crsid}}=
1389: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1390: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1391: }
1392: }
1393: #
1394: # Write course id database (reverse lookup) to homeserver of courses
1395: # Is used in pickcourse
1396: #
1397: foreach (keys %courseidbuffer) {
1398: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1399: }
1400: #
1401: # File accesses
1402: # Writes to the dynamic metadata of resources to get hit counts, etc.
1403: #
1404: foreach my $entry (keys(%accesshash)) {
1405: if ($entry =~ /___count$/) {
1406: my ($dom,$name);
1407: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1408: if (! defined($dom) || $dom eq '' ||
1409: ! defined($name) || $name eq '') {
1410: my $cid = $env{'request.course.id'};
1411: $dom = $env{'request.'.$cid.'.domain'};
1412: $name = $env{'request.'.$cid.'.num'};
1413: }
1414: my $value = $accesshash{$entry};
1415: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1416: my %temphash=($url => $value);
1417: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1418: if ($result eq 'ok') {
1419: delete $accesshash{$entry};
1420: } elsif ($result eq 'unknown_cmd') {
1421: # Target server has old code running on it.
1422: my %temphash=($entry => $value);
1423: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1424: delete $accesshash{$entry};
1425: }
1426: }
1427: } else {
1428: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1429: my %temphash=($entry => $accesshash{$entry});
1430: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1431: delete $accesshash{$entry};
1432: }
1433: }
1434: }
1435: #
1436: # Roles
1437: # Reverse lookup of user roles for course faculty/staff and co-authorship
1438: #
1439: foreach (keys %userrolehash) {
1440: my $entry=$_;
1441: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1442: split(/\:/,$entry);
1443: if (&Apache::lonnet::put('nohist_userroles',
1444: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1445: $rudom,$runame) eq 'ok') {
1446: delete $userrolehash{$entry};
1447: }
1448: }
1449: $dumpcount++;
1450: }
1451:
1452: sub courselog {
1453: my $what=shift;
1454: $what=time.':'.$what;
1455: unless ($env{'request.course.id'}) { return ''; }
1456: $coursedombuf{$env{'request.course.id'}}=
1457: $env{'course.'.$env{'request.course.id'}.'.domain'};
1458: $coursenumbuf{$env{'request.course.id'}}=
1459: $env{'course.'.$env{'request.course.id'}.'.num'};
1460: $coursehombuf{$env{'request.course.id'}}=
1461: $env{'course.'.$env{'request.course.id'}.'.home'};
1462: $coursedescrbuf{$env{'request.course.id'}}=
1463: $env{'course.'.$env{'request.course.id'}.'.description'};
1464: $courseinstcodebuf{$env{'request.course.id'}}=
1465: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1466: $courseownerbuf{$env{'request.course.id'}}=
1467: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1468: if (defined $courselogs{$env{'request.course.id'}}) {
1469: $courselogs{$env{'request.course.id'}}.='&'.$what;
1470: } else {
1471: $courselogs{$env{'request.course.id'}}.=$what;
1472: }
1473: if (length($courselogs{$env{'request.course.id'}})>4048) {
1474: &flushcourselogs();
1475: }
1476: }
1477:
1478: sub courseacclog {
1479: my $fnsymb=shift;
1480: unless ($env{'request.course.id'}) { return ''; }
1481: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1482: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1483: $what.=':POST';
1484: # FIXME: Probably ought to escape things....
1485: foreach (keys %env) {
1486: if ($_=~/^form\.(.*)/) {
1487: $what.=':'.$1.'='.$env{$_};
1488: }
1489: }
1490: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1491: # FIXME: We should not be depending on a form parameter that someone
1492: # editing lonsearchcat.pm might change in the future.
1493: if ($env{'form.phase'} eq 'course_search') {
1494: $what.= ':POST';
1495: # FIXME: Probably ought to escape things....
1496: foreach my $element ('courseexp','crsfulltext','crsrelated',
1497: 'crsdiscuss') {
1498: $what.=':'.$element.'='.$env{'form.'.$element};
1499: }
1500: }
1501: }
1502: &courselog($what);
1503: }
1504:
1505: sub countacc {
1506: my $url=&declutter(shift);
1507: return if (! defined($url) || $url eq '');
1508: unless ($env{'request.course.id'}) { return ''; }
1509: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1510: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1511: $accesshash{$key}++;
1512: }
1513:
1514: sub linklog {
1515: my ($from,$to)=@_;
1516: $from=&declutter($from);
1517: $to=&declutter($to);
1518: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1519: $accesshash{$to.'___'.$from.'___goto'}=1;
1520: }
1521:
1522: sub userrolelog {
1523: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1524: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1525: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1526: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1527: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1528: $userrolehash
1529: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1530: =$tend.':'.$tstart;
1531: }
1532: }
1533:
1534: sub get_course_adv_roles {
1535: my $cid=shift;
1536: $cid=$env{'request.course.id'} unless (defined($cid));
1537: my %coursehash=&coursedescription($cid);
1538: my %nothide=();
1539: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1540: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1541: }
1542: my %returnhash=();
1543: my %dumphash=
1544: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1545: my $now=time;
1546: foreach (keys %dumphash) {
1547: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1548: if (($tstart) && ($tstart<0)) { next; }
1549: if (($tend) && ($tend<$now)) { next; }
1550: if (($tstart) && ($now<$tstart)) { next; }
1551: my ($role,$username,$domain,$section)=split(/\:/,$_);
1552: if ($username eq '' || $domain eq '') { next; }
1553: if ((&privileged($username,$domain)) &&
1554: (!$nothide{$username.':'.$domain})) { next; }
1555: my $key=&plaintext($role);
1556: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1557: if ($returnhash{$key}) {
1558: $returnhash{$key}.=','.$username.':'.$domain;
1559: } else {
1560: $returnhash{$key}=$username.':'.$domain;
1561: }
1562: }
1563: return %returnhash;
1564: }
1565:
1566: sub get_my_roles {
1567: my ($uname,$udom)=@_;
1568: unless (defined($uname)) { $uname=$env{'user.name'}; }
1569: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1570: my %dumphash=
1571: &dump('nohist_userroles',$udom,$uname);
1572: my %returnhash=();
1573: my $now=time;
1574: foreach (keys %dumphash) {
1575: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1576: if (($tstart) && ($tstart<0)) { next; }
1577: if (($tend) && ($tend<$now)) { next; }
1578: if (($tstart) && ($now<$tstart)) { next; }
1579: my ($role,$username,$domain,$section)=split(/\:/,$_);
1580: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1581: }
1582: return %returnhash;
1583: }
1584:
1585: # ----------------------------------------------------- Frontpage Announcements
1586: #
1587: #
1588:
1589: sub postannounce {
1590: my ($server,$text)=@_;
1591: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1592: unless ($text=~/\w/) { $text=''; }
1593: return &reply('setannounce:'.&escape($text),$server);
1594: }
1595:
1596: sub getannounce {
1597:
1598: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1599: my $announcement='';
1600: while (<$fh>) { $announcement .=$_; }
1601: close($fh);
1602: if ($announcement=~/\w/) {
1603: return
1604: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1605: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1606: } else {
1607: return '';
1608: }
1609: } else {
1610: return '';
1611: }
1612: }
1613:
1614: # ---------------------------------------------------------- Course ID routines
1615: # Deal with domain's nohist_courseid.db files
1616: #
1617:
1618: sub courseidput {
1619: my ($domain,$what,$coursehome)=@_;
1620: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1621: }
1622:
1623: sub courseiddump {
1624: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref)=@_;
1625: my %returnhash=();
1626: unless ($domfilter) { $domfilter=''; }
1627: foreach my $tryserver (keys %libserv) {
1628: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1629: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1630: foreach (
1631: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1632: $sincefilter.':'.&escape($descfilter).':'.
1633: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter),
1634: $tryserver))) {
1635: my ($key,$value)=split(/\=/,$_);
1636: if (($key) && ($value)) {
1637: $returnhash{&unescape($key)}=$value;
1638: }
1639: }
1640: }
1641: }
1642: }
1643: return %returnhash;
1644: }
1645:
1646: #
1647: # ----------------------------------------------------------- Check out an item
1648:
1649: sub get_first_access {
1650: my ($type,$argsymb)=@_;
1651: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1652: if ($argsymb) { $symb=$argsymb; }
1653: my ($map,$id,$res)=&decode_symb($symb);
1654: if ($type eq 'map') {
1655: $res=&symbread($map);
1656: } else {
1657: $res=$symb;
1658: }
1659: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
1660: return $times{"$courseid\0$res"};
1661: }
1662:
1663: sub set_first_access {
1664: my ($type)=@_;
1665: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1666: my ($map,$id,$res)=&decode_symb($symb);
1667: if ($type eq 'map') {
1668: $res=&symbread($map);
1669: } else {
1670: $res=$symb;
1671: }
1672: my $firstaccess=&get_first_access($type,$symb);
1673: if (!$firstaccess) {
1674: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
1675: }
1676: return 'already_set';
1677: }
1678:
1679: sub checkout {
1680: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1681: my $now=time;
1682: my $lonhost=$perlvar{'lonHostID'};
1683: my $infostr=&escape(
1684: 'CHECKOUTTOKEN&'.
1685: $tuname.'&'.
1686: $tudom.'&'.
1687: $tcrsid.'&'.
1688: $symb.'&'.
1689: $now.'&'.$ENV{'REMOTE_ADDR'});
1690: my $token=&reply('tmpput:'.$infostr,$lonhost);
1691: if ($token=~/^error\:/) {
1692: &logthis("<font color=blue>WARNING: ".
1693: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1694: "</font>");
1695: return '';
1696: }
1697:
1698: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1699: $token=~tr/a-z/A-Z/;
1700:
1701: my %infohash=('resource.0.outtoken' => $token,
1702: 'resource.0.checkouttime' => $now,
1703: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1704:
1705: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1706: return '';
1707: } else {
1708: &logthis("<font color=blue>WARNING: ".
1709: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1710: "</font>");
1711: }
1712:
1713: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1714: &escape('Checkout '.$infostr.' - '.
1715: $token)) ne 'ok') {
1716: return '';
1717: } else {
1718: &logthis("<font color=blue>WARNING: ".
1719: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1720: "</font>");
1721: }
1722: return $token;
1723: }
1724:
1725: # ------------------------------------------------------------ Check in an item
1726:
1727: sub checkin {
1728: my $token=shift;
1729: my $now=time;
1730: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1731: $lonhost=~tr/A-Z/a-z/;
1732: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
1733: $dtoken=~s/\W/\_/g;
1734: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1735: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1736:
1737: unless (($tuname) && ($tudom)) {
1738: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1739: return '';
1740: }
1741:
1742: unless (&allowed('mgr',$tcrsid)) {
1743: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1744: $env{'user.name'}.' - '.$env{'user.domain'});
1745: return '';
1746: }
1747:
1748: my %infohash=('resource.0.intoken' => $token,
1749: 'resource.0.checkintime' => $now,
1750: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1751:
1752: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1753: return '';
1754: }
1755:
1756: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1757: &escape('Checkin - '.$token)) ne 'ok') {
1758: return '';
1759: }
1760:
1761: return ($symb,$tuname,$tudom,$tcrsid);
1762: }
1763:
1764: # --------------------------------------------- Set Expire Date for Spreadsheet
1765:
1766: sub expirespread {
1767: my ($uname,$udom,$stype,$usymb)=@_;
1768: my $cid=$env{'request.course.id'};
1769: if ($cid) {
1770: my $now=time;
1771: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1772: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
1773: $env{'course.'.$cid.'.num'}.
1774: ':nohist_expirationdates:'.
1775: &escape($key).'='.$now,
1776: $env{'course.'.$cid.'.home'})
1777: }
1778: return 'ok';
1779: }
1780:
1781: # ----------------------------------------------------- Devalidate Spreadsheets
1782:
1783: sub devalidate {
1784: my ($symb,$uname,$udom)=@_;
1785: my $cid=$env{'request.course.id'};
1786: if ($cid) {
1787: # delete the stored spreadsheets for
1788: # - the student level sheet of this user in course's homespace
1789: # - the assessment level sheet for this resource
1790: # for this user in user's homespace
1791: # - current conditional state info
1792: my $key=$uname.':'.$udom.':';
1793: my $status=
1794: &del('nohist_calculatedsheets',
1795: [$key.'studentcalc:'],
1796: $env{'course.'.$cid.'.domain'},
1797: $env{'course.'.$cid.'.num'})
1798: .' '.
1799: &del('nohist_calculatedsheets_'.$cid,
1800: [$key.'assesscalc:'.$symb],$udom,$uname);
1801: unless ($status eq 'ok ok') {
1802: &logthis('Could not devalidate spreadsheet '.
1803: $uname.' at '.$udom.' for '.
1804: $symb.': '.$status);
1805: }
1806: &delenv('user.state.'.$cid);
1807: }
1808: }
1809:
1810: sub get_scalar {
1811: my ($string,$end) = @_;
1812: my $value;
1813: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1814: $value = $1;
1815: } elsif ($$string =~ s/^([^&]*?)&//) {
1816: $value = $1;
1817: }
1818: return &unescape($value);
1819: }
1820:
1821: sub array2str {
1822: my (@array) = @_;
1823: my $result=&arrayref2str(\@array);
1824: $result=~s/^__ARRAY_REF__//;
1825: $result=~s/__END_ARRAY_REF__$//;
1826: return $result;
1827: }
1828:
1829: sub arrayref2str {
1830: my ($arrayref) = @_;
1831: my $result='__ARRAY_REF__';
1832: foreach my $elem (@$arrayref) {
1833: if(ref($elem) eq 'ARRAY') {
1834: $result.=&arrayref2str($elem).'&';
1835: } elsif(ref($elem) eq 'HASH') {
1836: $result.=&hashref2str($elem).'&';
1837: } elsif(ref($elem)) {
1838: #print("Got a ref of ".(ref($elem))." skipping.");
1839: } else {
1840: $result.=&escape($elem).'&';
1841: }
1842: }
1843: $result=~s/\&$//;
1844: $result .= '__END_ARRAY_REF__';
1845: return $result;
1846: }
1847:
1848: sub hash2str {
1849: my (%hash) = @_;
1850: my $result=&hashref2str(\%hash);
1851: $result=~s/^__HASH_REF__//;
1852: $result=~s/__END_HASH_REF__$//;
1853: return $result;
1854: }
1855:
1856: sub hashref2str {
1857: my ($hashref)=@_;
1858: my $result='__HASH_REF__';
1859: foreach (sort(keys(%$hashref))) {
1860: if (ref($_) eq 'ARRAY') {
1861: $result.=&arrayref2str($_).'=';
1862: } elsif (ref($_) eq 'HASH') {
1863: $result.=&hashref2str($_).'=';
1864: } elsif (ref($_)) {
1865: $result.='=';
1866: #print("Got a ref of ".(ref($_))." skipping.");
1867: } else {
1868: if ($_) {$result.=&escape($_).'=';} else { last; }
1869: }
1870:
1871: if(ref($hashref->{$_}) eq 'ARRAY') {
1872: $result.=&arrayref2str($hashref->{$_}).'&';
1873: } elsif(ref($hashref->{$_}) eq 'HASH') {
1874: $result.=&hashref2str($hashref->{$_}).'&';
1875: } elsif(ref($hashref->{$_})) {
1876: $result.='&';
1877: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1878: } else {
1879: $result.=&escape($hashref->{$_}).'&';
1880: }
1881: }
1882: $result=~s/\&$//;
1883: $result .= '__END_HASH_REF__';
1884: return $result;
1885: }
1886:
1887: sub str2hash {
1888: my ($string)=@_;
1889: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1890: return %$hash;
1891: }
1892:
1893: sub str2hashref {
1894: my ($string) = @_;
1895:
1896: my %hash;
1897:
1898: if($string !~ /^__HASH_REF__/) {
1899: if (! ($string eq '' || !defined($string))) {
1900: $hash{'error'}='Not hash reference';
1901: }
1902: return (\%hash, $string);
1903: }
1904:
1905: $string =~ s/^__HASH_REF__//;
1906:
1907: while($string !~ /^__END_HASH_REF__/) {
1908: #key
1909: my $key='';
1910: if($string =~ /^__HASH_REF__/) {
1911: ($key, $string)=&str2hashref($string);
1912: if(defined($key->{'error'})) {
1913: $hash{'error'}='Bad data';
1914: return (\%hash, $string);
1915: }
1916: } elsif($string =~ /^__ARRAY_REF__/) {
1917: ($key, $string)=&str2arrayref($string);
1918: if($key->[0] eq 'Array reference error') {
1919: $hash{'error'}='Bad data';
1920: return (\%hash, $string);
1921: }
1922: } else {
1923: $string =~ s/^(.*?)=//;
1924: $key=&unescape($1);
1925: }
1926: $string =~ s/^=//;
1927:
1928: #value
1929: my $value='';
1930: if($string =~ /^__HASH_REF__/) {
1931: ($value, $string)=&str2hashref($string);
1932: if(defined($value->{'error'})) {
1933: $hash{'error'}='Bad data';
1934: return (\%hash, $string);
1935: }
1936: } elsif($string =~ /^__ARRAY_REF__/) {
1937: ($value, $string)=&str2arrayref($string);
1938: if($value->[0] eq 'Array reference error') {
1939: $hash{'error'}='Bad data';
1940: return (\%hash, $string);
1941: }
1942: } else {
1943: $value=&get_scalar(\$string,'__END_HASH_REF__');
1944: }
1945: $string =~ s/^&//;
1946:
1947: $hash{$key}=$value;
1948: }
1949:
1950: $string =~ s/^__END_HASH_REF__//;
1951:
1952: return (\%hash, $string);
1953: }
1954:
1955: sub str2array {
1956: my ($string)=@_;
1957: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1958: return @$array;
1959: }
1960:
1961: sub str2arrayref {
1962: my ($string) = @_;
1963: my @array;
1964:
1965: if($string !~ /^__ARRAY_REF__/) {
1966: if (! ($string eq '' || !defined($string))) {
1967: $array[0]='Array reference error';
1968: }
1969: return (\@array, $string);
1970: }
1971:
1972: $string =~ s/^__ARRAY_REF__//;
1973:
1974: while($string !~ /^__END_ARRAY_REF__/) {
1975: my $value='';
1976: if($string =~ /^__HASH_REF__/) {
1977: ($value, $string)=&str2hashref($string);
1978: if(defined($value->{'error'})) {
1979: $array[0] ='Array reference error';
1980: return (\@array, $string);
1981: }
1982: } elsif($string =~ /^__ARRAY_REF__/) {
1983: ($value, $string)=&str2arrayref($string);
1984: if($value->[0] eq 'Array reference error') {
1985: $array[0] ='Array reference error';
1986: return (\@array, $string);
1987: }
1988: } else {
1989: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1990: }
1991: $string =~ s/^&//;
1992:
1993: push(@array, $value);
1994: }
1995:
1996: $string =~ s/^__END_ARRAY_REF__//;
1997:
1998: return (\@array, $string);
1999: }
2000:
2001: # -------------------------------------------------------------------Temp Store
2002:
2003: sub tmpreset {
2004: my ($symb,$namespace,$domain,$stuname) = @_;
2005: if (!$symb) {
2006: $symb=&symbread();
2007: if (!$symb) { $symb= $env{'request.url'}; }
2008: }
2009: $symb=escape($symb);
2010:
2011: if (!$namespace) { $namespace=$env{'request.state'}; }
2012: $namespace=~s/\//\_/g;
2013: $namespace=~s/\W//g;
2014:
2015: if (!$domain) { $domain=$env{'user.domain'}; }
2016: if (!$stuname) { $stuname=$env{'user.name'}; }
2017: if ($domain eq 'public' && $stuname eq 'public') {
2018: $stuname=$ENV{'REMOTE_ADDR'};
2019: }
2020: my $path=$perlvar{'lonDaemons'}.'/tmp';
2021: my %hash;
2022: if (tie(%hash,'GDBM_File',
2023: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2024: &GDBM_WRCREAT(),0640)) {
2025: foreach my $key (keys %hash) {
2026: if ($key=~ /:$symb/) {
2027: delete($hash{$key});
2028: }
2029: }
2030: }
2031: }
2032:
2033: sub tmpstore {
2034: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2035:
2036: if (!$symb) {
2037: $symb=&symbread();
2038: if (!$symb) { $symb= $env{'request.url'}; }
2039: }
2040: $symb=escape($symb);
2041:
2042: if (!$namespace) {
2043: # I don't think we would ever want to store this for a course.
2044: # it seems this will only be used if we don't have a course.
2045: #$namespace=$env{'request.course.id'};
2046: #if (!$namespace) {
2047: $namespace=$env{'request.state'};
2048: #}
2049: }
2050: $namespace=~s/\//\_/g;
2051: $namespace=~s/\W//g;
2052: if (!$domain) { $domain=$env{'user.domain'}; }
2053: if (!$stuname) { $stuname=$env{'user.name'}; }
2054: if ($domain eq 'public' && $stuname eq 'public') {
2055: $stuname=$ENV{'REMOTE_ADDR'};
2056: }
2057: my $now=time;
2058: my %hash;
2059: my $path=$perlvar{'lonDaemons'}.'/tmp';
2060: if (tie(%hash,'GDBM_File',
2061: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2062: &GDBM_WRCREAT(),0640)) {
2063: $hash{"version:$symb"}++;
2064: my $version=$hash{"version:$symb"};
2065: my $allkeys='';
2066: foreach my $key (keys(%$storehash)) {
2067: $allkeys.=$key.':';
2068: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2069: }
2070: $hash{"$version:$symb:timestamp"}=$now;
2071: $allkeys.='timestamp';
2072: $hash{"$version:keys:$symb"}=$allkeys;
2073: if (untie(%hash)) {
2074: return 'ok';
2075: } else {
2076: return "error:$!";
2077: }
2078: } else {
2079: return "error:$!";
2080: }
2081: }
2082:
2083: # -----------------------------------------------------------------Temp Restore
2084:
2085: sub tmprestore {
2086: my ($symb,$namespace,$domain,$stuname) = @_;
2087:
2088: if (!$symb) {
2089: $symb=&symbread();
2090: if (!$symb) { $symb= $env{'request.url'}; }
2091: }
2092: $symb=escape($symb);
2093:
2094: if (!$namespace) { $namespace=$env{'request.state'}; }
2095:
2096: if (!$domain) { $domain=$env{'user.domain'}; }
2097: if (!$stuname) { $stuname=$env{'user.name'}; }
2098: if ($domain eq 'public' && $stuname eq 'public') {
2099: $stuname=$ENV{'REMOTE_ADDR'};
2100: }
2101: my %returnhash;
2102: $namespace=~s/\//\_/g;
2103: $namespace=~s/\W//g;
2104: my %hash;
2105: my $path=$perlvar{'lonDaemons'}.'/tmp';
2106: if (tie(%hash,'GDBM_File',
2107: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2108: &GDBM_READER(),0640)) {
2109: my $version=$hash{"version:$symb"};
2110: $returnhash{'version'}=$version;
2111: my $scope;
2112: for ($scope=1;$scope<=$version;$scope++) {
2113: my $vkeys=$hash{"$scope:keys:$symb"};
2114: my @keys=split(/:/,$vkeys);
2115: my $key;
2116: $returnhash{"$scope:keys"}=$vkeys;
2117: foreach $key (@keys) {
2118: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2119: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2120: }
2121: }
2122: if (!(untie(%hash))) {
2123: return "error:$!";
2124: }
2125: } else {
2126: return "error:$!";
2127: }
2128: return %returnhash;
2129: }
2130:
2131: # ----------------------------------------------------------------------- Store
2132:
2133: sub store {
2134: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2135: my $home='';
2136:
2137: if ($stuname) { $home=&homeserver($stuname,$domain); }
2138:
2139: $symb=&symbclean($symb);
2140: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2141:
2142: if (!$domain) { $domain=$env{'user.domain'}; }
2143: if (!$stuname) { $stuname=$env{'user.name'}; }
2144:
2145: &devalidate($symb,$stuname,$domain);
2146:
2147: $symb=escape($symb);
2148: if (!$namespace) {
2149: unless ($namespace=$env{'request.course.id'}) {
2150: return '';
2151: }
2152: }
2153: if (!$home) { $home=$env{'user.home'}; }
2154:
2155: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2156: $$storehash{'host'}=$perlvar{'lonHostID'};
2157:
2158: my $namevalue='';
2159: foreach (keys %$storehash) {
2160: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2161: }
2162: $namevalue=~s/\&$//;
2163: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2164: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2165: }
2166:
2167: # -------------------------------------------------------------- Critical Store
2168:
2169: sub cstore {
2170: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2171: my $home='';
2172:
2173: if ($stuname) { $home=&homeserver($stuname,$domain); }
2174:
2175: $symb=&symbclean($symb);
2176: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2177:
2178: if (!$domain) { $domain=$env{'user.domain'}; }
2179: if (!$stuname) { $stuname=$env{'user.name'}; }
2180:
2181: &devalidate($symb,$stuname,$domain);
2182:
2183: $symb=escape($symb);
2184: if (!$namespace) {
2185: unless ($namespace=$env{'request.course.id'}) {
2186: return '';
2187: }
2188: }
2189: if (!$home) { $home=$env{'user.home'}; }
2190:
2191: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2192: $$storehash{'host'}=$perlvar{'lonHostID'};
2193:
2194: my $namevalue='';
2195: foreach (keys %$storehash) {
2196: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2197: }
2198: $namevalue=~s/\&$//;
2199: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2200: return critical
2201: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2202: }
2203:
2204: # --------------------------------------------------------------------- Restore
2205:
2206: sub restore {
2207: my ($symb,$namespace,$domain,$stuname) = @_;
2208: my $home='';
2209:
2210: if ($stuname) { $home=&homeserver($stuname,$domain); }
2211:
2212: if (!$symb) {
2213: unless ($symb=escape(&symbread())) { return ''; }
2214: } else {
2215: $symb=&escape(&symbclean($symb));
2216: }
2217: if (!$namespace) {
2218: unless ($namespace=$env{'request.course.id'}) {
2219: return '';
2220: }
2221: }
2222: if (!$domain) { $domain=$env{'user.domain'}; }
2223: if (!$stuname) { $stuname=$env{'user.name'}; }
2224: if (!$home) { $home=$env{'user.home'}; }
2225: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2226:
2227: my %returnhash=();
2228: foreach (split(/\&/,$answer)) {
2229: my ($name,$value)=split(/\=/,$_);
2230: $returnhash{&unescape($name)}=&thaw_unescape($value);
2231: }
2232: my $version;
2233: for ($version=1;$version<=$returnhash{'version'};$version++) {
2234: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2235: $returnhash{$_}=$returnhash{$version.':'.$_};
2236: }
2237: }
2238: return %returnhash;
2239: }
2240:
2241: # ---------------------------------------------------------- Course Description
2242:
2243: sub coursedescription {
2244: my $courseid=shift;
2245: $courseid=~s/^\///;
2246: $courseid=~s/\_/\//g;
2247: my ($cdomain,$cnum)=split(/\//,$courseid);
2248: my $chome=&homeserver($cnum,$cdomain);
2249: my $normalid=$cdomain.'_'.$cnum;
2250: # need to always cache even if we get errors otherwise we keep
2251: # trying and trying and trying to get the course description.
2252: my %envhash=();
2253: my %returnhash=();
2254: $envhash{'course.'.$normalid.'.last_cache'}=time;
2255: if ($chome ne 'no_host') {
2256: %returnhash=&dump('environment',$cdomain,$cnum);
2257: if (!exists($returnhash{'con_lost'})) {
2258: $returnhash{'home'}= $chome;
2259: $returnhash{'domain'} = $cdomain;
2260: $returnhash{'num'} = $cnum;
2261: while (my ($name,$value) = each %returnhash) {
2262: $envhash{'course.'.$normalid.'.'.$name}=$value;
2263: }
2264: $returnhash{'url'}=&clutter($returnhash{'url'});
2265: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2266: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2267: $envhash{'course.'.$normalid.'.home'}=$chome;
2268: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2269: $envhash{'course.'.$normalid.'.num'}=$cnum;
2270: }
2271: }
2272: &appenv(%envhash);
2273: return %returnhash;
2274: }
2275:
2276: # -------------------------------------------------See if a user is privileged
2277:
2278: sub privileged {
2279: my ($username,$domain)=@_;
2280: my $rolesdump=&reply("dump:$domain:$username:roles",
2281: &homeserver($username,$domain));
2282: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2283: my $now=time;
2284: if ($rolesdump ne '') {
2285: foreach (split(/&/,$rolesdump)) {
2286: if ($_!~/^rolesdef_/) {
2287: my ($area,$role)=split(/=/,$_);
2288: $area=~s/\_\w\w$//;
2289: my ($trole,$tend,$tstart)=split(/_/,$role);
2290: if (($trole eq 'dc') || ($trole eq 'su')) {
2291: my $active=1;
2292: if ($tend) {
2293: if ($tend<$now) { $active=0; }
2294: }
2295: if ($tstart) {
2296: if ($tstart>$now) { $active=0; }
2297: }
2298: if ($active) { return 1; }
2299: }
2300: }
2301: }
2302: }
2303: return 0;
2304: }
2305:
2306: # -------------------------------------------------------- Get user privileges
2307:
2308: sub rolesinit {
2309: my ($domain,$username,$authhost)=@_;
2310: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2311: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2312: my %allroles=();
2313: my $now=time;
2314: my $userroles="user.login.time=$now\n";
2315:
2316: if ($rolesdump ne '') {
2317: foreach (split(/&/,$rolesdump)) {
2318: if ($_!~/^rolesdef_/) {
2319: my ($area,$role)=split(/=/,$_);
2320: $area=~s/\_\w\w$//;
2321:
2322: my ($trole,$tend,$tstart);
2323: if ($role=~/^cr/) {
2324: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2325: ($tend,$tstart)=split('_',$trest);
2326: } else {
2327: ($trole,$tend,$tstart)=split(/_/,$role);
2328: }
2329: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2330: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2331: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2332: if (($area ne '') && ($trole ne '')) {
2333: my $spec=$trole.'.'.$area;
2334: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2335: if ($trole =~ /^cr\//) {
2336: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2337: } else {
2338: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2339: }
2340: }
2341: }
2342: }
2343: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles);
2344: $userroles.='user.adv='.$adv."\n".
2345: 'user.author='.$author."\n";
2346: $env{'user.adv'}=$adv;
2347: }
2348: return $userroles;
2349: }
2350:
2351: sub set_arearole {
2352: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2353: # log the associated role with the area
2354: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2355: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2356: }
2357:
2358: sub custom_roleprivs {
2359: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2360: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2361: my $homsvr=homeserver($rauthor,$rdomain);
2362: if ($hostname{$homsvr} ne '') {
2363: my ($rdummy,$roledef)=
2364: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2365: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2366: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2367: if (defined($syspriv)) {
2368: $$allroles{'cm./'}.=':'.$syspriv;
2369: $$allroles{$spec.'./'}.=':'.$syspriv;
2370: }
2371: if ($tdomain ne '') {
2372: if (defined($dompriv)) {
2373: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2374: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2375: }
2376: if (($trest ne '') && (defined($coursepriv))) {
2377: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2378: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2379: }
2380: }
2381: }
2382: }
2383: }
2384:
2385:
2386: sub standard_roleprivs {
2387: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2388: if (defined($pr{$trole.':s'})) {
2389: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2390: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2391: }
2392: if ($tdomain ne '') {
2393: if (defined($pr{$trole.':d'})) {
2394: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2395: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2396: }
2397: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2398: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2399: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2400: }
2401: }
2402: }
2403:
2404: sub set_userprivs {
2405: my ($userroles,$allroles) = @_;
2406: my $author=0;
2407: my $adv=0;
2408: foreach (keys %{$allroles}) {
2409: my %thesepriv=();
2410: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2411: foreach (split(/:/,$$allroles{$_})) {
2412: if ($_ ne '') {
2413: my ($privilege,$restrictions)=split(/&/,$_);
2414: if ($restrictions eq '') {
2415: $thesepriv{$privilege}='F';
2416: } elsif ($thesepriv{$privilege} ne 'F') {
2417: $thesepriv{$privilege}.=$restrictions;
2418: }
2419: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2420: }
2421: }
2422: my $thesestr='';
2423: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2424: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2425: }
2426: return ($author,$adv);
2427: }
2428:
2429: # --------------------------------------------------------------- get interface
2430:
2431: sub get {
2432: my ($namespace,$storearr,$udomain,$uname)=@_;
2433: my $items='';
2434: foreach (@$storearr) {
2435: $items.=escape($_).'&';
2436: }
2437: $items=~s/\&$//;
2438: if (!$udomain) { $udomain=$env{'user.domain'}; }
2439: if (!$uname) { $uname=$env{'user.name'}; }
2440: my $uhome=&homeserver($uname,$udomain);
2441:
2442: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2443: my @pairs=split(/\&/,$rep);
2444: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2445: return @pairs;
2446: }
2447: my %returnhash=();
2448: my $i=0;
2449: foreach (@$storearr) {
2450: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2451: $i++;
2452: }
2453: return %returnhash;
2454: }
2455:
2456: # --------------------------------------------------------------- del interface
2457:
2458: sub del {
2459: my ($namespace,$storearr,$udomain,$uname)=@_;
2460: my $items='';
2461: foreach (@$storearr) {
2462: $items.=escape($_).'&';
2463: }
2464: $items=~s/\&$//;
2465: if (!$udomain) { $udomain=$env{'user.domain'}; }
2466: if (!$uname) { $uname=$env{'user.name'}; }
2467: my $uhome=&homeserver($uname,$udomain);
2468:
2469: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2470: }
2471:
2472: # -------------------------------------------------------------- dump interface
2473:
2474: sub dump {
2475: my ($namespace,$udomain,$uname,$regexp)=@_;
2476: if (!$udomain) { $udomain=$env{'user.domain'}; }
2477: if (!$uname) { $uname=$env{'user.name'}; }
2478: my $uhome=&homeserver($uname,$udomain);
2479: if ($regexp) {
2480: $regexp=&escape($regexp);
2481: } else {
2482: $regexp='.';
2483: }
2484: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2485: my @pairs=split(/\&/,$rep);
2486: my %returnhash=();
2487: foreach (@pairs) {
2488: my ($key,$value)=split(/=/,$_);
2489: $returnhash{unescape($key)}=&thaw_unescape($value);
2490: }
2491: return %returnhash;
2492: }
2493:
2494: # -------------------------------------------------------------- keys interface
2495:
2496: sub getkeys {
2497: my ($namespace,$udomain,$uname)=@_;
2498: if (!$udomain) { $udomain=$env{'user.domain'}; }
2499: if (!$uname) { $uname=$env{'user.name'}; }
2500: my $uhome=&homeserver($uname,$udomain);
2501: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2502: my @keyarray=();
2503: foreach (split(/\&/,$rep)) {
2504: push (@keyarray,&unescape($_));
2505: }
2506: return @keyarray;
2507: }
2508:
2509: # --------------------------------------------------------------- currentdump
2510: sub currentdump {
2511: my ($courseid,$sdom,$sname)=@_;
2512: $courseid = $env{'request.course.id'} if (! defined($courseid));
2513: $sdom = $env{'user.domain'} if (! defined($sdom));
2514: $sname = $env{'user.name'} if (! defined($sname));
2515: my $uhome = &homeserver($sname,$sdom);
2516: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2517: return if ($rep =~ /^(error:|no_such_host)/);
2518: #
2519: my %returnhash=();
2520: #
2521: if ($rep eq "unknown_cmd") {
2522: # an old lond will not know currentdump
2523: # Do a dump and make it look like a currentdump
2524: my @tmp = &dump($courseid,$sdom,$sname,'.');
2525: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2526: my %hash = @tmp;
2527: @tmp=();
2528: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2529: } else {
2530: my @pairs=split(/\&/,$rep);
2531: foreach (@pairs) {
2532: my ($key,$value)=split(/=/,$_);
2533: my ($symb,$param) = split(/:/,$key);
2534: $returnhash{&unescape($symb)}->{&unescape($param)} =
2535: &thaw_unescape($value);
2536: }
2537: }
2538: return %returnhash;
2539: }
2540:
2541: sub convert_dump_to_currentdump{
2542: my %hash = %{shift()};
2543: my %returnhash;
2544: # Code ripped from lond, essentially. The only difference
2545: # here is the unescaping done by lonnet::dump(). Conceivably
2546: # we might run in to problems with parameter names =~ /^v\./
2547: while (my ($key,$value) = each(%hash)) {
2548: my ($v,$symb,$param) = split(/:/,$key);
2549: next if ($v eq 'version' || $symb eq 'keys');
2550: next if (exists($returnhash{$symb}) &&
2551: exists($returnhash{$symb}->{$param}) &&
2552: $returnhash{$symb}->{'v.'.$param} > $v);
2553: $returnhash{$symb}->{$param}=$value;
2554: $returnhash{$symb}->{'v.'.$param}=$v;
2555: }
2556: #
2557: # Remove all of the keys in the hashes which keep track of
2558: # the version of the parameter.
2559: while (my ($symb,$param_hash) = each(%returnhash)) {
2560: # use a foreach because we are going to delete from the hash.
2561: foreach my $key (keys(%$param_hash)) {
2562: delete($param_hash->{$key}) if ($key =~ /^v\./);
2563: }
2564: }
2565: return \%returnhash;
2566: }
2567:
2568: # ------------------------------------------------------ critical inc interface
2569:
2570: sub cinc {
2571: return &inc(@_,'critical');
2572: }
2573:
2574: # --------------------------------------------------------------- inc interface
2575:
2576: sub inc {
2577: my ($namespace,$store,$udomain,$uname,$critical) = @_;
2578: if (!$udomain) { $udomain=$env{'user.domain'}; }
2579: if (!$uname) { $uname=$env{'user.name'}; }
2580: my $uhome=&homeserver($uname,$udomain);
2581: my $items='';
2582: if (! ref($store)) {
2583: # got a single value, so use that instead
2584: $items = &escape($store).'=&';
2585: } elsif (ref($store) eq 'SCALAR') {
2586: $items = &escape($$store).'=&';
2587: } elsif (ref($store) eq 'ARRAY') {
2588: $items = join('=&',map {&escape($_);} @{$store});
2589: } elsif (ref($store) eq 'HASH') {
2590: while (my($key,$value) = each(%{$store})) {
2591: $items.= &escape($key).'='.&escape($value).'&';
2592: }
2593: }
2594: $items=~s/\&$//;
2595: if ($critical) {
2596: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
2597: } else {
2598: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2599: }
2600: }
2601:
2602: # --------------------------------------------------------------- put interface
2603:
2604: sub put {
2605: my ($namespace,$storehash,$udomain,$uname)=@_;
2606: if (!$udomain) { $udomain=$env{'user.domain'}; }
2607: if (!$uname) { $uname=$env{'user.name'}; }
2608: my $uhome=&homeserver($uname,$udomain);
2609: my $items='';
2610: foreach (keys %$storehash) {
2611: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2612: }
2613: $items=~s/\&$//;
2614: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2615: }
2616:
2617: # ------------------------------------------------------------ newput interface
2618:
2619: sub newput {
2620: my ($namespace,$storehash,$udomain,$uname)=@_;
2621: if (!$udomain) { $udomain=$env{'user.domain'}; }
2622: if (!$uname) { $uname=$env{'user.name'}; }
2623: my $uhome=&homeserver($uname,$udomain);
2624: my $items='';
2625: foreach my $key (keys(%$storehash)) {
2626: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
2627: }
2628: $items=~s/\&$//;
2629: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
2630: }
2631:
2632: # --------------------------------------------------------- putstore interface
2633:
2634: sub putstore {
2635: my ($namespace,$storehash,$udomain,$uname)=@_;
2636: if (!$udomain) { $udomain=$env{'user.domain'}; }
2637: if (!$uname) { $uname=$env{'user.name'}; }
2638: my $uhome=&homeserver($uname,$udomain);
2639: my $items='';
2640: my %allitems = ();
2641: foreach (keys %$storehash) {
2642: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2643: my $key = $1.':keys:'.$2;
2644: $allitems{$key} .= $3.':';
2645: }
2646: $items.=$_.'='.&freeze_escape($$storehash{$_}).'&';
2647: }
2648: foreach (keys %allitems) {
2649: $allitems{$_} =~ s/\:$//;
2650: $items.= $_.'='.$allitems{$_}.'&';
2651: }
2652: $items=~s/\&$//;
2653: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2654: }
2655:
2656: # ------------------------------------------------------ critical put interface
2657:
2658: sub cput {
2659: my ($namespace,$storehash,$udomain,$uname)=@_;
2660: if (!$udomain) { $udomain=$env{'user.domain'}; }
2661: if (!$uname) { $uname=$env{'user.name'}; }
2662: my $uhome=&homeserver($uname,$udomain);
2663: my $items='';
2664: foreach (keys %$storehash) {
2665: $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2666: }
2667: $items=~s/\&$//;
2668: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2669: }
2670:
2671: # -------------------------------------------------------------- eget interface
2672:
2673: sub eget {
2674: my ($namespace,$storearr,$udomain,$uname)=@_;
2675: my $items='';
2676: foreach (@$storearr) {
2677: $items.=escape($_).'&';
2678: }
2679: $items=~s/\&$//;
2680: if (!$udomain) { $udomain=$env{'user.domain'}; }
2681: if (!$uname) { $uname=$env{'user.name'}; }
2682: my $uhome=&homeserver($uname,$udomain);
2683: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2684: my @pairs=split(/\&/,$rep);
2685: my %returnhash=();
2686: my $i=0;
2687: foreach (@$storearr) {
2688: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2689: $i++;
2690: }
2691: return %returnhash;
2692: }
2693:
2694: # ---------------------------------------------- Custom access rule evaluation
2695:
2696: sub customaccess {
2697: my ($priv,$uri)=@_;
2698: my ($urole,$urealm)=split(/\./,$env{'request.role'});
2699: $urealm=~s/^\W//;
2700: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2701: my $access=0;
2702: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2703: my ($effect,$realm,$role)=split(/\:/,$_);
2704: if ($role) {
2705: if ($role ne $urole) { next; }
2706: }
2707: foreach (split(/\s*\,\s*/,$realm)) {
2708: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2709: if ($tdom) {
2710: if ($tdom ne $udom) { next; }
2711: }
2712: if ($tcrs) {
2713: if ($tcrs ne $ucrs) { next; }
2714: }
2715: if ($tsec) {
2716: if ($tsec ne $usec) { next; }
2717: }
2718: $access=($effect eq 'allow');
2719: last;
2720: }
2721: if ($realm eq '' && $role eq '') {
2722: $access=($effect eq 'allow');
2723: }
2724: }
2725: return $access;
2726: }
2727:
2728: # ------------------------------------------------- Check for a user privilege
2729:
2730: sub allowed {
2731: my ($priv,$uri,$symb)=@_;
2732: $uri=&deversion($uri);
2733: my $orguri=$uri;
2734: $uri=&declutter($uri);
2735:
2736:
2737:
2738: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
2739: # Free bre access to adm and meta resources
2740: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
2741: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2742: return 'F';
2743: }
2744:
2745: # Free bre access to user's own portfolio contents
2746: my ($space,$domain,$name,$dir)=split('/',$uri);
2747: if (($space=~/^(uploaded|ediupload)$/) && ($env{'user.name'} eq $name) &&
2748: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
2749: return 'F';
2750: }
2751:
2752: # Free bre to public access
2753:
2754: if ($priv eq 'bre') {
2755: my $copyright=&metadata($uri,'copyright');
2756: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
2757: return 'F';
2758: }
2759: if ($copyright eq 'priv') {
2760: $uri=~/([^\/]+)\/([^\/]+)\//;
2761: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
2762: return '';
2763: }
2764: }
2765: if ($copyright eq 'domain') {
2766: $uri=~/([^\/]+)\/([^\/]+)\//;
2767: unless (($env{'user.domain'} eq $1) ||
2768: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
2769: return '';
2770: }
2771: }
2772: if ($env{'request.role'}=~ /li\.\//) {
2773: # Library role, so allow browsing of resources in this domain.
2774: return 'F';
2775: }
2776: if ($copyright eq 'custom') {
2777: unless (&customaccess($priv,$uri)) { return ''; }
2778: }
2779: }
2780: # Domain coordinator is trying to create a course
2781: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
2782: # uri is the requested domain in this case.
2783: # comparison to 'request.role.domain' shows if the user has selected
2784: # a role of dc for the domain in question.
2785: return 'F' if ($uri eq $env{'request.role.domain'});
2786: }
2787:
2788: my $thisallowed='';
2789: my $statecond=0;
2790: my $courseprivid='';
2791:
2792: # Course
2793:
2794: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
2795: $thisallowed.=$1;
2796: }
2797:
2798: # Domain
2799:
2800: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2801: =~/\Q$priv\E\&([^\:]*)/) {
2802: $thisallowed.=$1;
2803: }
2804:
2805: # Course: uri itself is a course
2806: my $courseuri=$uri;
2807: $courseuri=~s/\_(\d)/\/$1/;
2808: $courseuri=~s/^([^\/])/\/$1/;
2809:
2810: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
2811: =~/\Q$priv\E\&([^\:]*)/) {
2812: $thisallowed.=$1;
2813: }
2814:
2815: # URI is an uploaded document for this course
2816: # not allowing 'edit' access (editupload) to uploaded course docs
2817: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
2818: my $refuri=$env{'httpref.'.$orguri};
2819: if ($refuri) {
2820: if ($refuri =~ m|^/adm/|) {
2821: $thisallowed='F';
2822: }
2823: }
2824: }
2825:
2826: # Full access at system, domain or course-wide level? Exit.
2827:
2828: if ($thisallowed=~/F/) {
2829: return 'F';
2830: }
2831:
2832: # If this is generating or modifying users, exit with special codes
2833:
2834: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
2835: return $thisallowed;
2836: }
2837: #
2838: # Gathered so far: system, domain and course wide privileges
2839: #
2840: # Course: See if uri or referer is an individual resource that is part of
2841: # the course
2842:
2843: if ($env{'request.course.id'}) {
2844:
2845: $courseprivid=$env{'request.course.id'};
2846: if ($env{'request.course.sec'}) {
2847: $courseprivid.='/'.$env{'request.course.sec'};
2848: }
2849: $courseprivid=~s/\_/\//;
2850: my $checkreferer=1;
2851: my ($match,$cond)=&is_on_map($uri);
2852: if ($match) {
2853: $statecond=$cond;
2854: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
2855: =~/\Q$priv\E\&([^\:]*)/) {
2856: $thisallowed.=$1;
2857: $checkreferer=0;
2858: }
2859: }
2860:
2861: if ($checkreferer) {
2862: my $refuri=$env{'httpref.'.$orguri};
2863: unless ($refuri) {
2864: foreach (keys %env) {
2865: if ($_=~/^httpref\..*\*/) {
2866: my $pattern=$_;
2867: $pattern=~s/^httpref\.\/res\///;
2868: $pattern=~s/\*/\[\^\/\]\+/g;
2869: $pattern=~s/\//\\\//g;
2870: if ($orguri=~/$pattern/) {
2871: $refuri=$env{$_};
2872: }
2873: }
2874: }
2875: }
2876:
2877: if ($refuri) {
2878: $refuri=&declutter($refuri);
2879: my ($match,$cond)=&is_on_map($refuri);
2880: if ($match) {
2881: my $refstatecond=$cond;
2882: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
2883: =~/\Q$priv\E\&([^\:]*)/) {
2884: $thisallowed.=$1;
2885: $uri=$refuri;
2886: $statecond=$refstatecond;
2887: }
2888: }
2889: }
2890: }
2891: }
2892:
2893: #
2894: # Gathered now: all privileges that could apply, and condition number
2895: #
2896: #
2897: # Full or no access?
2898: #
2899:
2900: if ($thisallowed=~/F/) {
2901: return 'F';
2902: }
2903:
2904: unless ($thisallowed) {
2905: return '';
2906: }
2907:
2908: # Restrictions exist, deal with them
2909: #
2910: # C:according to course preferences
2911: # R:according to resource settings
2912: # L:unless locked
2913: # X:according to user session state
2914: #
2915:
2916: # Possibly locked functionality, check all courses
2917: # Locks might take effect only after 10 minutes cache expiration for other
2918: # courses, and 2 minutes for current course
2919:
2920: my $envkey;
2921: if ($thisallowed=~/L/) {
2922: foreach $envkey (keys %env) {
2923: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2924: my $courseid=$2;
2925: my $roleid=$1.'.'.$2;
2926: $courseid=~s/^\///;
2927: my $expiretime=600;
2928: if ($env{'request.role'} eq $roleid) {
2929: $expiretime=120;
2930: }
2931: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2932: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2933: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
2934: &coursedescription($courseid);
2935: }
2936: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
2937: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2938: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2939: &log($env{'user.domain'},$env{'user.name'},
2940: $env{'user.home'},
2941: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2942: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2943: $env{$prefix.'priv.'.$priv.'.lock.expire'});
2944: return '';
2945: }
2946: }
2947: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
2948: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2949: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
2950: &log($env{'user.domain'},$env{'user.name'},
2951: $env{'user.home'},
2952: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2953: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2954: $env{$prefix.'priv.'.$priv.'.lock.expire'});
2955: return '';
2956: }
2957: }
2958: }
2959: }
2960: }
2961:
2962: #
2963: # Rest of the restrictions depend on selected course
2964: #
2965:
2966: unless ($env{'request.course.id'}) {
2967: return '1';
2968: }
2969:
2970: #
2971: # Now user is definitely in a course
2972: #
2973:
2974:
2975: # Course preferences
2976:
2977: if ($thisallowed=~/C/) {
2978: my $rolecode=(split(/\./,$env{'request.role'}))[0];
2979: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
2980: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
2981: =~/\Q$rolecode\E/) {
2982: &log($env{'user.domain'},$env{'user.name'},$env{'user.host'},
2983: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2984: $env{'request.course.id'});
2985: return '';
2986: }
2987:
2988: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
2989: =~/\Q$unamedom\E/) {
2990: &log($env{'user.domain'},$env{'user.name'},$env{'user.host'},
2991: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2992: $env{'request.course.id'});
2993: return '';
2994: }
2995: }
2996:
2997: # Resource preferences
2998:
2999: if ($thisallowed=~/R/) {
3000: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3001: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3002: &log($env{'user.domain'},$env{'user.name'},$env{'user.host'},
3003: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3004: return '';
3005: }
3006: }
3007:
3008: # Restricted by state or randomout?
3009:
3010: if ($thisallowed=~/X/) {
3011: if ($env{'acc.randomout'}) {
3012: if (!$symb) { $symb=&symbread($uri,1); }
3013: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3014: return '';
3015: }
3016: }
3017: if (&condval($statecond)) {
3018: return '2';
3019: } else {
3020: return '';
3021: }
3022: }
3023:
3024: return 'F';
3025: }
3026:
3027: # --------------------------------------------------- Is a resource on the map?
3028:
3029: sub is_on_map {
3030: my $uri=&declutter(shift);
3031: $uri=~s/\.\d+\.(\w+)$/\.$1/;
3032: my @uriparts=split(/\//,$uri);
3033: my $filename=$uriparts[$#uriparts];
3034: my $pathname=$uri;
3035: $pathname=~s|/\Q$filename\E$||;
3036: $pathname=~s/^adm\/wrapper\///;
3037: #Trying to find the conditional for the file
3038: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3039: /\&\Q$filename\E\:([\d\|]+)\&/);
3040: if ($match) {
3041: return (1,$1);
3042: } else {
3043: return (0,0);
3044: }
3045: }
3046:
3047: # --------------------------------------------------------- Get symb from alias
3048:
3049: sub get_symb_from_alias {
3050: my $symb=shift;
3051: my ($map,$resid,$url)=&decode_symb($symb);
3052: # Already is a symb
3053: if ($url) { return $symb; }
3054: # Must be an alias
3055: my $aliassymb='';
3056: my %bighash;
3057: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3058: &GDBM_READER(),0640)) {
3059: my $rid=$bighash{'mapalias_'.$symb};
3060: if ($rid) {
3061: my ($mapid,$resid)=split(/\./,$rid);
3062: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3063: $resid,$bighash{'src_'.$rid});
3064: }
3065: untie %bighash;
3066: }
3067: return $aliassymb;
3068: }
3069:
3070: # ----------------------------------------------------------------- Define Role
3071:
3072: sub definerole {
3073: if (allowed('mcr','/')) {
3074: my ($rolename,$sysrole,$domrole,$courole)=@_;
3075: foreach (split(':',$sysrole)) {
3076: my ($crole,$cqual)=split(/\&/,$_);
3077: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3078: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3079: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3080: return "refused:s:$crole&$cqual";
3081: }
3082: }
3083: }
3084: foreach (split(':',$domrole)) {
3085: my ($crole,$cqual)=split(/\&/,$_);
3086: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3087: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3088: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3089: return "refused:d:$crole&$cqual";
3090: }
3091: }
3092: }
3093: foreach (split(':',$courole)) {
3094: my ($crole,$cqual)=split(/\&/,$_);
3095: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3096: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3097: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3098: return "refused:c:$crole&$cqual";
3099: }
3100: }
3101: }
3102: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3103: "$env{'user.domain'}:$env{'user.name'}:".
3104: "rolesdef_$rolename=".
3105: escape($sysrole.'_'.$domrole.'_'.$courole);
3106: return reply($command,$env{'user.home'});
3107: } else {
3108: return 'refused';
3109: }
3110: }
3111:
3112: # ---------------- Make a metadata query against the network of library servers
3113:
3114: sub metadata_query {
3115: my ($query,$custom,$customshow,$server_array)=@_;
3116: my %rhash;
3117: my @server_list = (defined($server_array) ? @$server_array
3118: : keys(%libserv) );
3119: for my $server (@server_list) {
3120: unless ($custom or $customshow) {
3121: my $reply=&reply("querysend:".&escape($query),$server);
3122: $rhash{$server}=$reply;
3123: }
3124: else {
3125: my $reply=&reply("querysend:".&escape($query).':'.
3126: &escape($custom).':'.&escape($customshow),
3127: $server);
3128: $rhash{$server}=$reply;
3129: }
3130: }
3131: return \%rhash;
3132: }
3133:
3134: # ----------------------------------------- Send log queries and wait for reply
3135:
3136: sub log_query {
3137: my ($uname,$udom,$query,%filters)=@_;
3138: my $uhome=&homeserver($uname,$udom);
3139: if ($uhome eq 'no_host') { return 'error: no_host'; }
3140: my $uhost=$hostname{$uhome};
3141: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3142: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3143: $uhome);
3144: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3145: return get_query_reply($queryid);
3146: }
3147:
3148: # ------- Request retrieval of institutional classlists for course(s)
3149:
3150: sub fetch_enrollment_query {
3151: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3152: my $homeserver;
3153: my $maxtries = 1;
3154: if ($context eq 'automated') {
3155: $homeserver = $perlvar{'lonHostID'};
3156: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3157: } else {
3158: $homeserver = &homeserver($cnum,$dom);
3159: }
3160: my $host=$hostname{$homeserver};
3161: my $cmd = '';
3162: foreach (keys %{$affiliatesref}) {
3163: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3164: }
3165: $cmd =~ s/%%$//;
3166: $cmd = &escape($cmd);
3167: my $query = 'fetchenrollment';
3168: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3169: unless ($queryid=~/^\Q$host\E\_/) {
3170: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3171: return 'error: '.$queryid;
3172: }
3173: my $reply = &get_query_reply($queryid);
3174: my $tries = 1;
3175: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3176: $reply = &get_query_reply($queryid);
3177: $tries ++;
3178: }
3179: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3180: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3181: } else {
3182: my @responses = split/:/,$reply;
3183: if ($homeserver eq $perlvar{'lonHostID'}) {
3184: foreach (@responses) {
3185: my ($key,$value) = split/=/,$_;
3186: $$replyref{$key} = $value;
3187: }
3188: } else {
3189: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3190: foreach (@responses) {
3191: my ($key,$value) = split/=/,$_;
3192: $$replyref{$key} = $value;
3193: if ($value > 0) {
3194: foreach (@{$$affiliatesref{$key}}) {
3195: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3196: my $destname = $pathname.'/'.$filename;
3197: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3198: if ($xml_classlist =~ /^error/) {
3199: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3200: } else {
3201: if ( open(FILE,">$destname") ) {
3202: print FILE &unescape($xml_classlist);
3203: close(FILE);
3204: } else {
3205: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3206: }
3207: }
3208: }
3209: }
3210: }
3211: }
3212: return 'ok';
3213: }
3214: return 'error';
3215: }
3216:
3217: sub get_query_reply {
3218: my $queryid=shift;
3219: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3220: my $reply='';
3221: for (1..100) {
3222: sleep 2;
3223: if (-e $replyfile.'.end') {
3224: if (open(my $fh,$replyfile)) {
3225: $reply.=<$fh>;
3226: close($fh);
3227: } else { return 'error: reply_file_error'; }
3228: return &unescape($reply);
3229: }
3230: }
3231: return 'timeout:'.$queryid;
3232: }
3233:
3234: sub courselog_query {
3235: #
3236: # possible filters:
3237: # url: url or symb
3238: # username
3239: # domain
3240: # action: view, submit, grade
3241: # start: timestamp
3242: # end: timestamp
3243: #
3244: my (%filters)=@_;
3245: unless ($env{'request.course.id'}) { return 'no_course'; }
3246: if ($filters{'url'}) {
3247: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3248: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3249: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3250: }
3251: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
3252: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
3253: return &log_query($cname,$cdom,'courselog',%filters);
3254: }
3255:
3256: sub userlog_query {
3257: my ($uname,$udom,%filters)=@_;
3258: return &log_query($uname,$udom,'userlog',%filters);
3259: }
3260:
3261: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3262:
3263: sub auto_run {
3264: my ($cnum,$cdom) = @_;
3265: my $homeserver = &homeserver($cnum,$cdom);
3266: my $response = &reply('autorun:'.$cdom,$homeserver);
3267: return $response;
3268: }
3269:
3270: sub auto_get_sections {
3271: my ($cnum,$cdom,$inst_coursecode) = @_;
3272: my $homeserver = &homeserver($cnum,$cdom);
3273: my @secs = ();
3274: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3275: unless ($response eq 'refused') {
3276: @secs = split/:/,$response;
3277: }
3278: return @secs;
3279: }
3280:
3281: sub auto_new_course {
3282: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3283: my $homeserver = &homeserver($cnum,$cdom);
3284: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3285: return $response;
3286: }
3287:
3288: sub auto_validate_courseID {
3289: my ($cnum,$cdom,$inst_course_id) = @_;
3290: my $homeserver = &homeserver($cnum,$cdom);
3291: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3292: return $response;
3293: }
3294:
3295: sub auto_create_password {
3296: my ($cnum,$cdom,$authparam) = @_;
3297: my $homeserver = &homeserver($cnum,$cdom);
3298: my $create_passwd = 0;
3299: my $authchk = '';
3300: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3301: if ($response eq 'refused') {
3302: $authchk = 'refused';
3303: } else {
3304: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3305: }
3306: return ($authparam,$create_passwd,$authchk);
3307: }
3308:
3309: sub auto_instcode_format {
3310: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3311: my $courses = '';
3312: my $homeserver;
3313: if ($caller eq 'global') {
3314: foreach my $tryserver (keys %libserv) {
3315: if ($hostdom{$tryserver} eq $codedom) {
3316: $homeserver = $tryserver;
3317: last;
3318: }
3319: }
3320: if (($env{'user.name'}) && ($env{'user.domain'} eq $codedom)) {
3321: $homeserver = &homeserver($env{'user.name'},$codedom);
3322: }
3323: } else {
3324: $homeserver = &homeserver($caller,$codedom);
3325: }
3326: foreach (keys %{$instcodes}) {
3327: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3328: }
3329: chop($courses);
3330: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3331: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3332: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3333: %{$codes} = &str2hash($codes_str);
3334: @{$codetitles} = &str2array($codetitles_str);
3335: %{$cat_titles} = &str2hash($cat_titles_str);
3336: %{$cat_order} = &str2hash($cat_order_str);
3337: return 'ok';
3338: }
3339: return $response;
3340: }
3341:
3342: # ------------------------------------------------------------------ Plain Text
3343:
3344: sub plaintext {
3345: my $short=shift;
3346: return &mt($prp{$short});
3347: }
3348:
3349: # ----------------------------------------------------------------- Assign Role
3350:
3351: sub assignrole {
3352: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3353: my $mrole;
3354: if ($role =~ /^cr\//) {
3355: my $cwosec=$url;
3356: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3357: unless (&allowed('ccr',$cwosec)) {
3358: &logthis('Refused custom assignrole: '.
3359: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3360: $env{'user.name'}.' at '.$env{'user.domain'});
3361: return 'refused';
3362: }
3363: $mrole='cr';
3364: } else {
3365: my $cwosec=$url;
3366: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3367: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3368: &logthis('Refused assignrole: '.
3369: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3370: $env{'user.name'}.' at '.$env{'user.domain'});
3371: return 'refused';
3372: }
3373: $mrole=$role;
3374: }
3375: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3376: "$udom:$uname:$url".'_'."$mrole=$role";
3377: if ($end) { $command.='_'.$end; }
3378: if ($start) {
3379: if ($end) {
3380: $command.='_'.$start;
3381: } else {
3382: $command.='_0_'.$start;
3383: }
3384: }
3385: # actually delete
3386: if ($deleteflag) {
3387: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3388: # modify command to delete the role
3389: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
3390: "$udom:$uname:$url".'_'."$mrole";
3391: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
3392: # set start and finish to negative values for userrolelog
3393: $start=-1;
3394: $end=-1;
3395: }
3396: }
3397: # send command
3398: my $answer=&reply($command,&homeserver($uname,$udom));
3399: # log new user role if status is ok
3400: if ($answer eq 'ok') {
3401: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3402: }
3403: return $answer;
3404: }
3405:
3406: # -------------------------------------------------- Modify user authentication
3407: # Overrides without validation
3408:
3409: sub modifyuserauth {
3410: my ($udom,$uname,$umode,$upass)=@_;
3411: my $uhome=&homeserver($uname,$udom);
3412: unless (&allowed('mau',$udom)) { return 'refused'; }
3413: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3414: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
3415: ' in domain '.$env{'request.role.domain'});
3416: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3417: &escape($upass),$uhome);
3418: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
3419: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3420: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3421: &log($udom,,$uname,$uhome,
3422: 'Authentication changed by '.$env{'user.domain'}.', '.
3423: $env{'user.name'}.', '.$umode.
3424: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3425: unless ($reply eq 'ok') {
3426: &logthis('Authentication mode error: '.$reply);
3427: return 'error: '.$reply;
3428: }
3429: return 'ok';
3430: }
3431:
3432: # --------------------------------------------------------------- Modify a user
3433:
3434: sub modifyuser {
3435: my ($udom, $uname, $uid,
3436: $umode, $upass, $first,
3437: $middle, $last, $gene,
3438: $forceid, $desiredhome, $email)=@_;
3439: $udom=~s/\W//g;
3440: $uname=~s/\W//g;
3441: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3442: $umode.', '.$first.', '.$middle.', '.
3443: $last.', '.$gene.'(forceid: '.$forceid.')'.
3444: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3445: ' desiredhome not specified').
3446: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
3447: ' in domain '.$env{'request.role.domain'});
3448: my $uhome=&homeserver($uname,$udom,'true');
3449: # ----------------------------------------------------------------- Create User
3450: if (($uhome eq 'no_host') &&
3451: (($umode && $upass) || ($umode eq 'localauth'))) {
3452: my $unhome='';
3453: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3454: $unhome = $desiredhome;
3455: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
3456: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
3457: } else { # load balancing routine for determining $unhome
3458: my $tryserver;
3459: my $loadm=10000000;
3460: foreach $tryserver (keys %libserv) {
3461: if ($hostdom{$tryserver} eq $udom) {
3462: my $answer=reply('load',$tryserver);
3463: if (($answer=~/\d+/) && ($answer<$loadm)) {
3464: $loadm=$answer;
3465: $unhome=$tryserver;
3466: }
3467: }
3468: }
3469: }
3470: if (($unhome eq '') || ($unhome eq 'no_host')) {
3471: return 'error: unable to find a home server for '.$uname.
3472: ' in domain '.$udom;
3473: }
3474: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3475: &escape($upass),$unhome);
3476: unless ($reply eq 'ok') {
3477: return 'error: '.$reply;
3478: }
3479: $uhome=&homeserver($uname,$udom,'true');
3480: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3481: return 'error: unable verify users home machine.';
3482: }
3483: } # End of creation of new user
3484: # ---------------------------------------------------------------------- Add ID
3485: if ($uid) {
3486: $uid=~tr/A-Z/a-z/;
3487: my %uidhash=&idrget($udom,$uname);
3488: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3489: && (!$forceid)) {
3490: unless ($uid eq $uidhash{$uname}) {
3491: return 'error: user id "'.$uid.'" does not match '.
3492: 'current user id "'.$uidhash{$uname}.'".';
3493: }
3494: } else {
3495: &idput($udom,($uname => $uid));
3496: }
3497: }
3498: # -------------------------------------------------------------- Add names, etc
3499: my @tmp=&get('environment',
3500: ['firstname','middlename','lastname','generation'],
3501: $udom,$uname);
3502: my %names;
3503: if ($tmp[0] =~ m/^error:.*/) {
3504: %names=();
3505: } else {
3506: %names = @tmp;
3507: }
3508: #
3509: # Make sure to not trash student environment if instructor does not bother
3510: # to supply name and email information
3511: #
3512: if ($first) { $names{'firstname'} = $first; }
3513: if (defined($middle)) { $names{'middlename'} = $middle; }
3514: if ($last) { $names{'lastname'} = $last; }
3515: if (defined($gene)) { $names{'generation'} = $gene; }
3516: if ($email) {
3517: $email=~s/[^\w\@\.\-\,]//gs;
3518: if ($email=~/\@/) { $names{'notification'} = $email;
3519: $names{'critnotification'} = $email;
3520: $names{'permanentemail'} = $email; }
3521: }
3522: my $reply = &put('environment', \%names, $udom,$uname);
3523: if ($reply ne 'ok') { return 'error: '.$reply; }
3524: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3525: $umode.', '.$first.', '.$middle.', '.
3526: $last.', '.$gene.' by '.
3527: $env{'user.name'}.' at '.$env{'user.domain'});
3528: return 'ok';
3529: }
3530:
3531: # -------------------------------------------------------------- Modify student
3532:
3533: sub modifystudent {
3534: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3535: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
3536: if (!$cid) {
3537: unless ($cid=$env{'request.course.id'}) {
3538: return 'not_in_class';
3539: }
3540: }
3541: # --------------------------------------------------------------- Make the user
3542: my $reply=&modifyuser
3543: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3544: $desiredhome,$email);
3545: unless ($reply eq 'ok') { return $reply; }
3546: # This will cause &modify_student_enrollment to get the uid from the
3547: # students environment
3548: $uid = undef if (!$forceid);
3549: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3550: $gene,$usec,$end,$start,$type,$locktype,$cid);
3551: return $reply;
3552: }
3553:
3554: sub modify_student_enrollment {
3555: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
3556: my ($cdom,$cnum,$chome);
3557: if (!$cid) {
3558: unless ($cid=$env{'request.course.id'}) {
3559: return 'not_in_class';
3560: }
3561: $cdom=$env{'course.'.$cid.'.domain'};
3562: $cnum=$env{'course.'.$cid.'.num'};
3563: } else {
3564: ($cdom,$cnum)=split(/_/,$cid);
3565: }
3566: $chome=$env{'course.'.$cid.'.home'};
3567: if (!$chome) {
3568: $chome=&homeserver($cnum,$cdom);
3569: }
3570: if (!$chome) { return 'unknown_course'; }
3571: # Make sure the user exists
3572: my $uhome=&homeserver($uname,$udom);
3573: if (($uhome eq '') || ($uhome eq 'no_host')) {
3574: return 'error: no such user';
3575: }
3576: # Get student data if we were not given enough information
3577: if (!defined($first) || $first eq '' ||
3578: !defined($last) || $last eq '' ||
3579: !defined($uid) || $uid eq '' ||
3580: !defined($middle) || $middle eq '' ||
3581: !defined($gene) || $gene eq '') {
3582: # They did not supply us with enough data to enroll the student, so
3583: # we need to pick up more information.
3584: my %tmp = &get('environment',
3585: ['firstname','middlename','lastname', 'generation','id']
3586: ,$udom,$uname);
3587:
3588: #foreach (keys(%tmp)) {
3589: # &logthis("key $_ = ".$tmp{$_});
3590: #}
3591: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3592: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3593: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3594: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3595: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3596: }
3597: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
3598: my $reply=cput('classlist',
3599: {"$uname:$udom" =>
3600: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
3601: $cdom,$cnum);
3602: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3603: return 'error: '.$reply;
3604: }
3605: # Add student role to user
3606: my $uurl='/'.$cid;
3607: $uurl=~s/\_/\//g;
3608: if ($usec) {
3609: $uurl.='/'.$usec;
3610: }
3611: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3612: }
3613:
3614: sub format_name {
3615: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
3616: my $name;
3617: if ($first ne 'lastname') {
3618: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
3619: } else {
3620: if ($lastname=~/\S/) {
3621: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
3622: $name=~s/\s+,/,/;
3623: } else {
3624: $name.= $firstname.' '.$middlename.' '.$generation;
3625: }
3626: }
3627: $name=~s/^\s+//;
3628: $name=~s/\s+$//;
3629: $name=~s/\s+/ /g;
3630: return $name;
3631: }
3632:
3633: # ------------------------------------------------- Write to course preferences
3634:
3635: sub writecoursepref {
3636: my ($courseid,%prefs)=@_;
3637: $courseid=~s/^\///;
3638: $courseid=~s/\_/\//g;
3639: my ($cdomain,$cnum)=split(/\//,$courseid);
3640: my $chome=homeserver($cnum,$cdomain);
3641: if (($chome eq '') || ($chome eq 'no_host')) {
3642: return 'error: no such course';
3643: }
3644: my $cstring='';
3645: foreach (keys %prefs) {
3646: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3647: }
3648: $cstring=~s/\&$//;
3649: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3650: }
3651:
3652: # ---------------------------------------------------------- Make/modify course
3653:
3654: sub createcourse {
3655: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
3656: $url=&declutter($url);
3657: my $cid='';
3658: unless (&allowed('ccc',$udom)) {
3659: return 'refused';
3660: }
3661: # ------------------------------------------------------------------- Create ID
3662: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3663: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3664: # ----------------------------------------------- Make sure that does not exist
3665: my $uhome=&homeserver($uname,$udom,'true');
3666: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3667: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3668: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3669: $uhome=&homeserver($uname,$udom,'true');
3670: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3671: return 'error: unable to generate unique course-ID';
3672: }
3673: }
3674: # ------------------------------------------------ Check supplied server name
3675: $course_server = $env{'user.homeserver'} if (! defined($course_server));
3676: if (! exists($libserv{$course_server})) {
3677: return 'error:bad server name '.$course_server;
3678: }
3679: # ------------------------------------------------------------- Make the course
3680: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3681: $course_server);
3682: unless ($reply eq 'ok') { return 'error: '.$reply; }
3683: $uhome=&homeserver($uname,$udom,'true');
3684: if (($uhome eq '') || ($uhome eq 'no_host')) {
3685: return 'error: no such course';
3686: }
3687: # ----------------------------------------------------------------- Course made
3688: # log existence
3689: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
3690: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
3691: &flushcourselogs();
3692: # set toplevel url
3693: my $topurl=$url;
3694: unless ($nonstandard) {
3695: # ------------------------------------------ For standard courses, make top url
3696: my $mapurl=&clutter($url);
3697: if ($mapurl eq '/res/') { $mapurl=''; }
3698: $env{'form.initmap'}=(<<ENDINITMAP);
3699: <map>
3700: <resource id="1" type="start"></resource>
3701: <resource id="2" src="$mapurl"></resource>
3702: <resource id="3" type="finish"></resource>
3703: <link index="1" from="1" to="2"></link>
3704: <link index="2" from="2" to="3"></link>
3705: </map>
3706: ENDINITMAP
3707: $topurl=&declutter(
3708: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3709: );
3710: }
3711: # ----------------------------------------------------------- Write preferences
3712: &writecoursepref($udom.'_'.$uname,
3713: ('description' => $description,
3714: 'url' => $topurl));
3715: return '/'.$udom.'/'.$uname;
3716: }
3717:
3718: # ---------------------------------------------------------- Assign Custom Role
3719:
3720: sub assigncustomrole {
3721: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3722: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3723: $end,$start,$deleteflag);
3724: }
3725:
3726: # ----------------------------------------------------------------- Revoke Role
3727:
3728: sub revokerole {
3729: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3730: my $now=time;
3731: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3732: }
3733:
3734: # ---------------------------------------------------------- Revoke Custom Role
3735:
3736: sub revokecustomrole {
3737: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3738: my $now=time;
3739: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3740: $deleteflag);
3741: }
3742:
3743: # ------------------------------------------------------------ Disk usage
3744: sub diskusage {
3745: my ($udom,$uname,$directoryRoot)=@_;
3746: $directoryRoot =~ s/\/$//;
3747: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
3748: return $listing;
3749: }
3750:
3751: sub is_locked {
3752: my ($file_name, $domain, $user) = @_;
3753: my @check;
3754: my $is_locked;
3755: push @check, $file_name;
3756: my %locked = &get('file_permissions',\@check,
3757: $env{'user.domain'},$env{'user.name'});
3758: my ($tmp)=keys(%locked);
3759: if ($tmp=~/^error:/) { undef(%locked); }
3760:
3761: if (ref($locked{$file_name}) eq 'ARRAY') {
3762: $is_locked = 'true';
3763: } else {
3764: $is_locked = 'false';
3765: }
3766: }
3767:
3768: # ------------------------------------------------------------- Mark as Read Only
3769:
3770: sub mark_as_readonly {
3771: my ($domain,$user,$files,$what) = @_;
3772: my %current_permissions = &dump('file_permissions',$domain,$user);
3773: my ($tmp)=keys(%current_permissions);
3774: if ($tmp=~/^error:/) { undef(%current_permissions); }
3775: foreach my $file (@{$files}) {
3776: push(@{$current_permissions{$file}},$what);
3777: }
3778: &put('file_permissions',\%current_permissions,$domain,$user);
3779: return;
3780: }
3781:
3782: # ------------------------------------------------------------Save Selected Files
3783:
3784: sub save_selected_files {
3785: my ($user, $path, @files) = @_;
3786: my $filename = $user."savedfiles";
3787: my @other_files = &files_not_in_path($user, $path);
3788: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3789: foreach my $file (@files) {
3790: print (OUT $env{'form.currentpath'}.$file."\n");
3791: }
3792: foreach my $file (@other_files) {
3793: print (OUT $file."\n");
3794: }
3795: close (OUT);
3796: return 'ok';
3797: }
3798:
3799: sub clear_selected_files {
3800: my ($user) = @_;
3801: my $filename = $user."savedfiles";
3802: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3803: print (OUT undef);
3804: close (OUT);
3805: return ("ok");
3806: }
3807:
3808: sub files_in_path {
3809: my ($user, $path) = @_;
3810: my $filename = $user."savedfiles";
3811: my %return_files;
3812: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3813: while (my $line_in = <IN>) {
3814: chomp ($line_in);
3815: my @paths_and_file = split (m!/!, $line_in);
3816: my $file_part = pop (@paths_and_file);
3817: my $path_part = join ('/', @paths_and_file);
3818: $path_part.='/';
3819: my $path_and_file = $path_part.$file_part;
3820: if ($path_part eq $path) {
3821: $return_files{$file_part}= 'selected';
3822: }
3823: }
3824: close (IN);
3825: return (\%return_files);
3826: }
3827:
3828: # called in portfolio select mode, to show files selected NOT in current directory
3829: sub files_not_in_path {
3830: my ($user, $path) = @_;
3831: my $filename = $user."savedfiles";
3832: my @return_files;
3833: my $path_part;
3834: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3835: while (<IN>) {
3836: #ok, I know it's clunky, but I want it to work
3837: my @paths_and_file = split m!/!, $_;
3838: my $file_part = pop (@paths_and_file);
3839: chomp ($file_part);
3840: my $path_part = join ('/', @paths_and_file);
3841: $path_part .= '/';
3842: my $path_and_file = $path_part.$file_part;
3843: if ($path_part ne $path) {
3844: push (@return_files, ($path_and_file));
3845: }
3846: }
3847: close (OUT);
3848: return (@return_files);
3849: }
3850:
3851: #--------------------------------------------------------------Get Marked as Read Only
3852:
3853:
3854: sub get_marked_as_readonly {
3855: my ($domain,$user,$what) = @_;
3856: my %current_permissions = &dump('file_permissions',$domain,$user);
3857: my ($tmp)=keys(%current_permissions);
3858: if ($tmp=~/^error:/) { undef(%current_permissions); }
3859: my @readonly_files;
3860: my $cmp1=$what;
3861: if (ref($what)) { $cmp1=join('',@{$what}) };
3862: while (my ($file_name,$value) = each(%current_permissions)) {
3863: if (ref($value) eq "ARRAY"){
3864: foreach my $stored_what (@{$value}) {
3865: my $cmp2=$stored_what;
3866: if (ref($stored_what)) { $cmp2=join('',@{$stored_what}) };
3867: if ($cmp1 eq $cmp2) {
3868: push(@readonly_files, $file_name);
3869: } elsif (!defined($what)) {
3870: push(@readonly_files, $file_name);
3871: }
3872: }
3873: }
3874: }
3875: return @readonly_files;
3876: }
3877: #-----------------------------------------------------------Get Marked as Read Only Hash
3878:
3879: sub get_marked_as_readonly_hash {
3880: my ($domain,$user,$what) = @_;
3881: my %current_permissions = &dump('file_permissions',$domain,$user);
3882: my ($tmp)=keys(%current_permissions);
3883: if ($tmp=~/^error:/) { undef(%current_permissions); }
3884:
3885: my %readonly_files;
3886: while (my ($file_name,$value) = each(%current_permissions)) {
3887: if (ref($value) eq "ARRAY"){
3888: foreach my $stored_what (@{$value}) {
3889: if ($stored_what eq $what) {
3890: $readonly_files{$file_name} = 'locked';
3891: } elsif (!defined($what)) {
3892: $readonly_files{$file_name} = 'locked';
3893: }
3894: }
3895: }
3896: }
3897: return %readonly_files;
3898: }
3899: # ------------------------------------------------------------ Unmark as Read Only
3900:
3901: sub unmark_as_readonly {
3902: # unmarks $file_name (if $file_name is defined), or all files locked by $what
3903: # for portfolio submissions, $what contains [$symb,$crsid]
3904: my ($domain,$user,$what,$file_name) = @_;
3905: my $symb_crs = $what;
3906: if (ref($what)) { $symb_crs=join('',@$what); }
3907: my %current_permissions = &dump('file_permissions',$domain,$user);
3908: my ($tmp)=keys(%current_permissions);
3909: if ($tmp=~/^error:/) { undef(%current_permissions); }
3910: my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
3911: foreach my $file(@readonly_files){
3912: my $current_locks = $current_permissions{$file};
3913: my @new_locks;
3914: my @del_keys;
3915: if (ref($current_locks) eq "ARRAY"){
3916: foreach my $locker (@{$current_locks}) {
3917: my $compare=$locker;
3918: if (ref($locker)) { $compare=join('',@{$locker}) };
3919: if ($compare eq $symb_crs) {
3920: if (defined($file_name) && ($file_name ne $file)) {
3921: push(@new_locks, $what);
3922: }
3923: } else {
3924: push(@new_locks, $what);
3925: }
3926: }
3927: if (@new_locks > 0) {
3928: $current_permissions{$file} = \@new_locks;
3929: } else {
3930: push(@del_keys, $file);
3931: &del('file_permissions',\@del_keys, $domain, $user);
3932: delete $current_permissions{$file};
3933: }
3934: }
3935: }
3936: &put('file_permissions',\%current_permissions,$domain,$user);
3937: return;
3938: }
3939:
3940: # ------------------------------------------------------------ Directory lister
3941:
3942: sub dirlist {
3943: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3944:
3945: $uri=~s/^\///;
3946: $uri=~s/\/$//;
3947: my ($udom, $uname);
3948: (undef,$udom,$uname)=split(/\//,$uri);
3949: if(defined($userdomain)) {
3950: $udom = $userdomain;
3951: }
3952: if(defined($username)) {
3953: $uname = $username;
3954: }
3955:
3956: my $dirRoot = $perlvar{'lonDocRoot'};
3957: if(defined($alternateDirectoryRoot)) {
3958: $dirRoot = $alternateDirectoryRoot;
3959: $dirRoot =~ s/\/$//;
3960: }
3961:
3962: if($udom) {
3963: if($uname) {
3964: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
3965: homeserver($uname,$udom));
3966: my @listing_results;
3967: if ($listing eq 'unknown_cmd') {
3968: $listing=reply('ls:'.$dirRoot.'/'.$uri,
3969: homeserver($uname,$udom));
3970: @listing_results = split(/:/,$listing);
3971: } else {
3972: @listing_results = map { &unescape($_); } split(/:/,$listing);
3973: }
3974: return @listing_results;
3975: } elsif(!defined($alternateDirectoryRoot)) {
3976: my $tryserver;
3977: my %allusers=();
3978: foreach $tryserver (keys %libserv) {
3979: if($hostdom{$tryserver} eq $udom) {
3980: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
3981: $udom, $tryserver);
3982: my @listing_results;
3983: if ($listing eq 'unknown_cmd') {
3984: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3985: $udom, $tryserver);
3986: @listing_results = split(/:/,$listing);
3987: } else {
3988: @listing_results =
3989: map { &unescape($_); } split(/:/,$listing);
3990: }
3991: if ($listing_results[0] ne 'no_such_dir' &&
3992: $listing_results[0] ne 'empty' &&
3993: $listing_results[0] ne 'con_lost') {
3994: foreach (@listing_results) {
3995: my ($entry,@stat)=split(/&/,$_);
3996: $allusers{$entry}=1;
3997: }
3998: }
3999: }
4000: }
4001: my $alluserstr='';
4002: foreach (sort keys %allusers) {
4003: $alluserstr.=$_.'&user:';
4004: }
4005: $alluserstr=~s/:$//;
4006: return split(/:/,$alluserstr);
4007: } else {
4008: my @emptyResults = ();
4009: push(@emptyResults, 'missing user name');
4010: return split(':',@emptyResults);
4011: }
4012: } elsif(!defined($alternateDirectoryRoot)) {
4013: my $tryserver;
4014: my %alldom=();
4015: foreach $tryserver (keys %libserv) {
4016: $alldom{$hostdom{$tryserver}}=1;
4017: }
4018: my $alldomstr='';
4019: foreach (sort keys %alldom) {
4020: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
4021: }
4022: $alldomstr=~s/:$//;
4023: return split(/:/,$alldomstr);
4024: } else {
4025: my @emptyResults = ();
4026: push(@emptyResults, 'missing domain');
4027: return split(':',@emptyResults);
4028: }
4029: }
4030:
4031: # --------------------------------------------- GetFileTimestamp
4032: # This function utilizes dirlist and returns the date stamp for
4033: # when it was last modified. It will also return an error of -1
4034: # if an error occurs
4035:
4036: ##
4037: ## FIXME: This subroutine assumes its caller knows something about the
4038: ## directory structure of the home server for the student ($root).
4039: ## Not a good assumption to make. Since this is for looking up files
4040: ## in user directories, the full path should be constructed by lond, not
4041: ## whatever machine we request data from.
4042: ##
4043: sub GetFileTimestamp {
4044: my ($studentDomain,$studentName,$filename,$root)=@_;
4045: $studentDomain=~s/\W//g;
4046: $studentName=~s/\W//g;
4047: my $subdir=$studentName.'__';
4048: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4049: my $proname="$studentDomain/$subdir/$studentName";
4050: $proname .= '/'.$filename;
4051: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4052: $studentName, $root);
4053: my @stats = split('&', $fileStat);
4054: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4055: # @stats contains first the filename, then the stat output
4056: return $stats[10]; # so this is 10 instead of 9.
4057: } else {
4058: return -1;
4059: }
4060: }
4061:
4062: # -------------------------------------------------------- Value of a Condition
4063:
4064: sub directcondval {
4065: my $number=shift;
4066: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
4067: &Apache::lonuserstate::evalstate();
4068: }
4069: if ($env{'user.state.'.$env{'request.course.id'}}) {
4070: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
4071: } else {
4072: return 2;
4073: }
4074: }
4075:
4076: sub condval {
4077: my $condidx=shift;
4078: my $result=0;
4079: my $allpathcond='';
4080: foreach (split(/\|/,$condidx)) {
4081: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$_})) {
4082: $allpathcond.=
4083: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$_}.')|';
4084: }
4085: }
4086: $allpathcond=~s/\|$//;
4087: if ($env{'request.course.id'}) {
4088: if ($allpathcond) {
4089: my $operand='|';
4090: my @stack;
4091: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
4092: if ($_ eq '(') {
4093: push @stack,($operand,$result)
4094: } elsif ($_ eq ')') {
4095: my $before=pop @stack;
4096: if (pop @stack eq '&') {
4097: $result=$result>$before?$before:$result;
4098: } else {
4099: $result=$result>$before?$result:$before;
4100: }
4101: } elsif (($_ eq '&') || ($_ eq '|')) {
4102: $operand=$_;
4103: } else {
4104: my $new=directcondval($_);
4105: if ($operand eq '&') {
4106: $result=$result>$new?$new:$result;
4107: } else {
4108: $result=$result>$new?$result:$new;
4109: }
4110: }
4111: }
4112: }
4113: }
4114: return $result;
4115: }
4116:
4117: # ---------------------------------------------------- Devalidate courseresdata
4118:
4119: sub devalidatecourseresdata {
4120: my ($coursenum,$coursedomain)=@_;
4121: my $hashid=$coursenum.':'.$coursedomain;
4122: &devalidate_cache_new('courseres',$hashid);
4123: }
4124:
4125: # --------------------------------------------------- Course Resourcedata Query
4126:
4127: sub get_courseresdata {
4128: my ($coursenum,$coursedomain)=@_;
4129: my $coursehom=&homeserver($coursenum,$coursedomain);
4130: my $hashid=$coursenum.':'.$coursedomain;
4131: my ($result,$cached)=&is_cached_new('courseres',$hashid);
4132: my %dumpreply;
4133: unless (defined($cached)) {
4134: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4135: $result=\%dumpreply;
4136: my ($tmp) = keys(%dumpreply);
4137: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4138: &do_cache_new('courseres',$hashid,$result,600);
4139: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4140: return $tmp;
4141: } elsif ($tmp =~ /^(error)/) {
4142: $result=undef;
4143: &do_cache_new('courseres',$hashid,$result,600);
4144: }
4145: }
4146: return $result;
4147: }
4148:
4149: sub devalidateuserresdata {
4150: my ($uname,$udom)=@_;
4151: my $hashid="$udom:$uname";
4152: &devalidate_cache_new('userres',$hashid);
4153: }
4154:
4155: sub get_userresdata {
4156: my ($uname,$udom)=@_;
4157: #most student don\'t have any data set, check if there is some data
4158: if (&EXT_cache_status($udom,$uname)) { return undef; }
4159:
4160: my $hashid="$udom:$uname";
4161: my ($result,$cached)=&is_cached_new('userres',$hashid);
4162: if (!defined($cached)) {
4163: my %resourcedata=&dump('resourcedata',$udom,$uname);
4164: $result=\%resourcedata;
4165: &do_cache_new('userres',$hashid,$result,600);
4166: }
4167: my ($tmp)=keys(%$result);
4168: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4169: return $result;
4170: }
4171: #error 2 occurs when the .db doesn't exist
4172: if ($tmp!~/error: 2 /) {
4173: &logthis("<font color=blue>WARNING:".
4174: " Trying to get resource data for ".
4175: $uname." at ".$udom.": ".
4176: $tmp."</font>");
4177: } elsif ($tmp=~/error: 2 /) {
4178: #&EXT_cache_set($udom,$uname);
4179: &do_cache_new('userres',$hashid,undef,600);
4180: }
4181: return $tmp;
4182: }
4183:
4184: sub resdata {
4185: my ($name,$domain,$type,@which)=@_;
4186: my $result;
4187: if ($type eq 'course') {
4188: $result=&get_courseresdata($name,$domain);
4189: } elsif ($type eq 'user') {
4190: $result=&get_userresdata($name,$domain);
4191: }
4192: if (!ref($result)) { return $result; }
4193: foreach my $item (@which) {
4194: if (defined($result->{$item})) {
4195: return $result->{$item};
4196: }
4197: }
4198: return undef;
4199: }
4200:
4201: #
4202: # EXT resource caching routines
4203: #
4204:
4205: sub clear_EXT_cache_status {
4206: &delenv('cache.EXT.');
4207: }
4208:
4209: sub EXT_cache_status {
4210: my ($target_domain,$target_user) = @_;
4211: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4212: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
4213: # We know already the user has no data
4214: return 1;
4215: } else {
4216: return 0;
4217: }
4218: }
4219:
4220: sub EXT_cache_set {
4221: my ($target_domain,$target_user) = @_;
4222: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4223: #&appenv($cachename => time);
4224: }
4225:
4226: # --------------------------------------------------------- Value of a Variable
4227: sub EXT {
4228: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4229:
4230: unless ($varname) { return ''; }
4231: #get real user name/domain, courseid and symb
4232: my $courseid;
4233: my $publicuser;
4234: if ($symbparm) {
4235: $symbparm=&get_symb_from_alias($symbparm);
4236: }
4237: if (!($uname && $udom)) {
4238: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4239: &Apache::lonxml::whichuser($symbparm);
4240: if (!$symbparm) { $symbparm=$cursymb; }
4241: } else {
4242: $courseid=$env{'request.course.id'};
4243: }
4244: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4245: my $rest;
4246: if (defined($therest[0])) {
4247: $rest=join('.',@therest);
4248: } else {
4249: $rest='';
4250: }
4251:
4252: my $qualifierrest=$qualifier;
4253: if ($rest) { $qualifierrest.='.'.$rest; }
4254: my $spacequalifierrest=$space;
4255: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4256: if ($realm eq 'user') {
4257: # --------------------------------------------------------------- user.resource
4258: if ($space eq 'resource') {
4259: if (defined($Apache::lonhomework::parsing_a_problem) ||
4260: defined($Apache::lonhomework::parsing_a_task)) {
4261: return $Apache::lonhomework::history{$qualifierrest};
4262: } else {
4263: my %restored;
4264: if ($publicuser || $env{'request.state'} eq 'construct') {
4265: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4266: } else {
4267: %restored=&restore($symbparm,$courseid,$udom,$uname);
4268: }
4269: return $restored{$qualifierrest};
4270: }
4271: # ----------------------------------------------------------------- user.access
4272: } elsif ($space eq 'access') {
4273: # FIXME - not supporting calls for a specific user
4274: return &allowed($qualifier,$rest);
4275: # ------------------------------------------ user.preferences, user.environment
4276: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4277: if (($uname eq $env{'user.name'}) &&
4278: ($udom eq $env{'user.domain'})) {
4279: return $env{join('.',('environment',$qualifierrest))};
4280: } else {
4281: my %returnhash;
4282: if (!$publicuser) {
4283: %returnhash=&userenvironment($udom,$uname,
4284: $qualifierrest);
4285: }
4286: return $returnhash{$qualifierrest};
4287: }
4288: # ----------------------------------------------------------------- user.course
4289: } elsif ($space eq 'course') {
4290: # FIXME - not supporting calls for a specific user
4291: return $env{join('.',('request.course',$qualifier))};
4292: # ------------------------------------------------------------------- user.role
4293: } elsif ($space eq 'role') {
4294: # FIXME - not supporting calls for a specific user
4295: my ($role,$where)=split(/\./,$env{'request.role'});
4296: if ($qualifier eq 'value') {
4297: return $role;
4298: } elsif ($qualifier eq 'extent') {
4299: return $where;
4300: }
4301: # ----------------------------------------------------------------- user.domain
4302: } elsif ($space eq 'domain') {
4303: return $udom;
4304: # ------------------------------------------------------------------- user.name
4305: } elsif ($space eq 'name') {
4306: return $uname;
4307: # ---------------------------------------------------- Any other user namespace
4308: } else {
4309: my %reply;
4310: if (!$publicuser) {
4311: %reply=&get($space,[$qualifierrest],$udom,$uname);
4312: }
4313: return $reply{$qualifierrest};
4314: }
4315: } elsif ($realm eq 'query') {
4316: # ---------------------------------------------- pull stuff out of query string
4317: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4318: [$spacequalifierrest]);
4319: return $env{'form.'.$spacequalifierrest};
4320: } elsif ($realm eq 'request') {
4321: # ------------------------------------------------------------- request.browser
4322: if ($space eq 'browser') {
4323: if ($qualifier eq 'textremote') {
4324: if (&mt('textual_remote_display') eq 'on') {
4325: return 1;
4326: } else {
4327: return 0;
4328: }
4329: } else {
4330: return $env{'browser.'.$qualifier};
4331: }
4332: # ------------------------------------------------------------ request.filename
4333: } else {
4334: return $env{'request.'.$spacequalifierrest};
4335: }
4336: } elsif ($realm eq 'course') {
4337: # ---------------------------------------------------------- course.description
4338: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
4339: } elsif ($realm eq 'resource') {
4340:
4341: my $section;
4342: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
4343: if (!$symbparm) { $symbparm=&symbread(); }
4344: }
4345: my ($courselevelm,$courselevel);
4346: if ($symbparm && defined($courseid) &&
4347: $courseid eq $env{'request.course.id'}) {
4348:
4349: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4350:
4351: # ----------------------------------------------------- Cascading lookup scheme
4352: my $symbp=$symbparm;
4353: my $mapp=(&decode_symb($symbp))[0];
4354:
4355: my $symbparm=$symbp.'.'.$spacequalifierrest;
4356: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4357:
4358: if (($env{'user.name'} eq $uname) &&
4359: ($env{'user.domain'} eq $udom)) {
4360: $section=$env{'request.course.sec'};
4361: } else {
4362: if (! defined($usection)) {
4363: $section=&getsection($udom,$uname,$courseid);
4364: } else {
4365: $section = $usection;
4366: }
4367: }
4368:
4369: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4370: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4371: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4372:
4373: $courselevel=$courseid.'.'.$spacequalifierrest;
4374: my $courselevelr=$courseid.'.'.$symbparm;
4375: $courselevelm=$courseid.'.'.$mapparm;
4376:
4377: # ----------------------------------------------------------- first, check user
4378:
4379: my $userreply=&resdata($uname,$udom,'user',
4380: ($courselevelr,$courselevelm,
4381: $courselevel));
4382:
4383: if (defined($userreply)) { return $userreply; }
4384:
4385: # ------------------------------------------------ second, check some of course
4386:
4387: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
4388: $env{'course.'.$courseid.'.domain'},
4389: 'course',
4390: ($seclevelr,$seclevelm,$seclevel,
4391: $courselevelr));
4392: if (defined($coursereply)) { return $coursereply; }
4393:
4394: # ------------------------------------------------------ third, check map parms
4395: my %parmhash=();
4396: my $thisparm='';
4397: if (tie(%parmhash,'GDBM_File',
4398: $env{'request.course.fn'}.'_parms.db',
4399: &GDBM_READER(),0640)) {
4400: $thisparm=$parmhash{$symbparm};
4401: untie(%parmhash);
4402: }
4403: if ($thisparm) { return $thisparm; }
4404: }
4405: # ------------------------------------------ fourth, look in resource metadata
4406:
4407: $spacequalifierrest=~s/\./\_/;
4408: my $filename;
4409: if (!$symbparm) { $symbparm=&symbread(); }
4410: if ($symbparm) {
4411: $filename=(&decode_symb($symbparm))[2];
4412: } else {
4413: $filename=$env{'request.filename'};
4414: }
4415: my $metadata=&metadata($filename,$spacequalifierrest);
4416: if (defined($metadata)) { return $metadata; }
4417: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4418: if (defined($metadata)) { return $metadata; }
4419:
4420: # ---------------------------------------------- fourth, look in rest pf course
4421: if ($symbparm && defined($courseid) &&
4422: $courseid eq $env{'request.course.id'}) {
4423: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
4424: $env{'course.'.$courseid.'.domain'},
4425: 'course',
4426: ($courselevelm,$courselevel));
4427: if (defined($coursereply)) { return $coursereply; }
4428: }
4429: # ------------------------------------------------------------------ Cascade up
4430: unless ($space eq '0') {
4431: my @parts=split(/_/,$space);
4432: my $id=pop(@parts);
4433: my $part=join('_',@parts);
4434: if ($part eq '') { $part='0'; }
4435: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4436: $symbparm,$udom,$uname,$section,1);
4437: if (defined($partgeneral)) { return $partgeneral; }
4438: }
4439: if ($recurse) { return undef; }
4440: my $pack_def=&packages_tab_default($filename,$varname);
4441: if (defined($pack_def)) { return $pack_def; }
4442:
4443: # ---------------------------------------------------- Any other user namespace
4444: } elsif ($realm eq 'environment') {
4445: # ----------------------------------------------------------------- environment
4446: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
4447: return $env{'environment.'.$spacequalifierrest};
4448: } else {
4449: my %returnhash=&userenvironment($udom,$uname,
4450: $spacequalifierrest);
4451: return $returnhash{$spacequalifierrest};
4452: }
4453: } elsif ($realm eq 'system') {
4454: # ----------------------------------------------------------------- system.time
4455: if ($space eq 'time') {
4456: return time;
4457: }
4458: }
4459: return '';
4460: }
4461:
4462: sub packages_tab_default {
4463: my ($uri,$varname)=@_;
4464: my (undef,$part,$name)=split(/\./,$varname);
4465: my $packages=&metadata($uri,'packages');
4466: foreach my $package (split(/,/,$packages)) {
4467: my ($pack_type,$pack_part)=split(/_/,$package,2);
4468: if (defined($packagetab{"$pack_type&$name&default"})) {
4469: return $packagetab{"$pack_type&$name&default"};
4470: }
4471: if ($pack_type eq 'part') { $pack_part='0'; }
4472: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4473: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4474: }
4475: }
4476: return undef;
4477: }
4478:
4479: sub add_prefix_and_part {
4480: my ($prefix,$part)=@_;
4481: my $keyroot;
4482: if (defined($prefix) && $prefix !~ /^__/) {
4483: # prefix that has a part already
4484: $keyroot=$prefix;
4485: } elsif (defined($prefix)) {
4486: # prefix that is missing a part
4487: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4488: } else {
4489: # no prefix at all
4490: if (defined($part)) { $keyroot='_'.$part; }
4491: }
4492: return $keyroot;
4493: }
4494:
4495: # ---------------------------------------------------------------- Get metadata
4496:
4497: my %metaentry;
4498: sub metadata {
4499: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
4500: $uri=&declutter($uri);
4501: # if it is a non metadata possible uri return quickly
4502: if (($uri eq '') ||
4503: (($uri =~ m|^/*adm/|) &&
4504: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
4505: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
4506: ($uri =~ m|home/[^/]+/public_html/|)) {
4507: return undef;
4508: }
4509: my $filename=$uri;
4510: $uri=~s/\.meta$//;
4511: #
4512: # Is the metadata already cached?
4513: # Look at timestamp of caching
4514: # Everything is cached by the main uri, libraries are never directly cached
4515: #
4516: if (!defined($liburi)) {
4517: my ($result,$cached)=&is_cached_new('meta',$uri);
4518: if (defined($cached)) { return $result->{':'.$what}; }
4519: }
4520: {
4521: #
4522: # Is this a recursive call for a library?
4523: #
4524: # if (! exists($metacache{$uri})) {
4525: # $metacache{$uri}={};
4526: # }
4527: if ($liburi) {
4528: $liburi=&declutter($liburi);
4529: $filename=$liburi;
4530: } else {
4531: &devalidate_cache_new('meta',$uri);
4532: undef(%metaentry);
4533: }
4534: my %metathesekeys=();
4535: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
4536: my $metastring;
4537: if ($uri !~ m -^(uploaded|editupload)/-) {
4538: my $file=&filelocation('',&clutter($filename));
4539: #push(@{$metaentry{$uri.'.file'}},$file);
4540: $metastring=&getfile($file);
4541: }
4542: my $parser=HTML::LCParser->new(\$metastring);
4543: my $token;
4544: undef %metathesekeys;
4545: while ($token=$parser->get_token) {
4546: if ($token->[0] eq 'S') {
4547: if (defined($token->[2]->{'package'})) {
4548: #
4549: # This is a package - get package info
4550: #
4551: my $package=$token->[2]->{'package'};
4552: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4553: if (defined($token->[2]->{'id'})) {
4554: $keyroot.='_'.$token->[2]->{'id'};
4555: }
4556: if ($metaentry{':packages'}) {
4557: $metaentry{':packages'}.=','.$package.$keyroot;
4558: } else {
4559: $metaentry{':packages'}=$package.$keyroot;
4560: }
4561: foreach (sort keys %packagetab) {
4562: my $part=$keyroot;
4563: $part=~s/^\_//;
4564: if ($_=~/^\Q$package\E\&/ ||
4565: $_=~/^\Q$package\E_0\&/) {
4566: my ($pack,$name,$subp)=split(/\&/,$_);
4567: # ignore package.tab specified default values
4568: # here &package_tab_default() will fetch those
4569: if ($subp eq 'default') { next; }
4570: my $value=$packagetab{$_};
4571: my $unikey;
4572: if ($pack =~ /_0$/) {
4573: $unikey='parameter_0_'.$name;
4574: $part=0;
4575: } else {
4576: $unikey='parameter'.$keyroot.'_'.$name;
4577: }
4578: if ($subp eq 'display') {
4579: $value.=' [Part: '.$part.']';
4580: }
4581: $metaentry{':'.$unikey.'.part'}=$part;
4582: $metathesekeys{$unikey}=1;
4583: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
4584: $metaentry{':'.$unikey.'.'.$subp}=$value;
4585: }
4586: if (defined($metaentry{':'.$unikey.'.default'})) {
4587: $metaentry{':'.$unikey}=
4588: $metaentry{':'.$unikey.'.default'};
4589: }
4590: }
4591: }
4592: } else {
4593: #
4594: # This is not a package - some other kind of start tag
4595: #
4596: my $entry=$token->[1];
4597: my $unikey;
4598: if ($entry eq 'import') {
4599: $unikey='';
4600: } else {
4601: $unikey=$entry;
4602: }
4603: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4604:
4605: if (defined($token->[2]->{'id'})) {
4606: $unikey.='_'.$token->[2]->{'id'};
4607: }
4608:
4609: if ($entry eq 'import') {
4610: #
4611: # Importing a library here
4612: #
4613: if ($depthcount<20) {
4614: my $location=$parser->get_text('/import');
4615: my $dir=$filename;
4616: $dir=~s|[^/]*$||;
4617: $location=&filelocation($dir,$location);
4618: foreach (sort(split(/\,/,&metadata($uri,'keys',
4619: $location,$unikey,
4620: $depthcount+1)))) {
4621: $metaentry{':'.$_}=$metaentry{':'.$_};
4622: $metathesekeys{$_}=1;
4623: }
4624: }
4625: } else {
4626:
4627: if (defined($token->[2]->{'name'})) {
4628: $unikey.='_'.$token->[2]->{'name'};
4629: }
4630: $metathesekeys{$unikey}=1;
4631: foreach (@{$token->[3]}) {
4632: $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4633: }
4634: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4635: my $default=$metaentry{':'.$unikey.'.default'};
4636: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4637: # only ws inside the tag, and not in default, so use default
4638: # as value
4639: $metaentry{':'.$unikey}=$default;
4640: } else {
4641: # either something interesting inside the tag or default
4642: # uninteresting
4643: $metaentry{':'.$unikey}=$internaltext;
4644: }
4645: # end of not-a-package not-a-library import
4646: }
4647: # end of not-a-package start tag
4648: }
4649: # the next is the end of "start tag"
4650: }
4651: }
4652: my ($extension) = ($uri =~ /\.(\w+)$/);
4653: foreach my $key (sort(keys(%packagetab))) {
4654: #&logthis("extsion1 $extension $key !!");
4655: #no specific packages #how's our extension
4656: if ($key!~/^extension_\Q$extension\E&/) { next; }
4657: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4658: \%metathesekeys);
4659: }
4660: if (!exists($metaentry{':packages'})) {
4661: foreach my $key (sort(keys(%packagetab))) {
4662: #no specific packages well let's get default then
4663: if ($key!~/^default&/) { next; }
4664: &metadata_create_package_def($uri,$key,'default',
4665: \%metathesekeys);
4666: }
4667: }
4668: # are there custom rights to evaluate
4669: if ($metaentry{':copyright'} eq 'custom') {
4670:
4671: #
4672: # Importing a rights file here
4673: #
4674: unless ($depthcount) {
4675: my $location=$metaentry{':customdistributionfile'};
4676: my $dir=$filename;
4677: $dir=~s|[^/]*$||;
4678: $location=&filelocation($dir,$location);
4679: foreach (sort(split(/\,/,&metadata($uri,'keys',
4680: $location,'_rights',
4681: $depthcount+1)))) {
4682: #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
4683: $metathesekeys{$_}=1;
4684: }
4685: }
4686: }
4687: $metaentry{':keys'}=join(',',keys %metathesekeys);
4688: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
4689: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
4690: &do_cache_new('meta',$uri,\%metaentry,60*60*24);
4691: # this is the end of "was not already recently cached
4692: }
4693: return $metaentry{':'.$what};
4694: }
4695:
4696: sub metadata_create_package_def {
4697: my ($uri,$key,$package,$metathesekeys)=@_;
4698: my ($pack,$name,$subp)=split(/\&/,$key);
4699: if ($subp eq 'default') { next; }
4700:
4701: if (defined($metaentry{':packages'})) {
4702: $metaentry{':packages'}.=','.$package;
4703: } else {
4704: $metaentry{':packages'}=$package;
4705: }
4706: my $value=$packagetab{$key};
4707: my $unikey;
4708: $unikey='parameter_0_'.$name;
4709: $metaentry{':'.$unikey.'.part'}=0;
4710: $$metathesekeys{$unikey}=1;
4711: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
4712: $metaentry{':'.$unikey.'.'.$subp}=$value;
4713: }
4714: if (defined($metaentry{':'.$unikey.'.default'})) {
4715: $metaentry{':'.$unikey}=
4716: $metaentry{':'.$unikey.'.default'};
4717: }
4718: }
4719:
4720: sub metadata_generate_part0 {
4721: my ($metadata,$metacache,$uri) = @_;
4722: my %allnames;
4723: foreach my $metakey (sort keys %$metadata) {
4724: if ($metakey=~/^parameter\_(.*)/) {
4725: my $part=$$metacache{':'.$metakey.'.part'};
4726: my $name=$$metacache{':'.$metakey.'.name'};
4727: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
4728: $allnames{$name}=$part;
4729: }
4730: }
4731: }
4732: foreach my $name (keys(%allnames)) {
4733: $$metadata{"parameter_0_$name"}=1;
4734: my $key=":parameter_0_$name";
4735: $$metacache{"$key.part"}='0';
4736: $$metacache{"$key.name"}=$name;
4737: $$metacache{"$key.type"}=$$metacache{':parameter_'.
4738: $allnames{$name}.'_'.$name.
4739: '.type'};
4740: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
4741: '.display'};
4742: my $expr='\\[Part: '.$allnames{$name}.'\\]';
4743: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
4744: $$metacache{"$key.display"}=$olddis;
4745: }
4746: }
4747:
4748: # ------------------------------------------------- Get the title of a resource
4749:
4750: sub gettitle {
4751: my $urlsymb=shift;
4752: my $symb=&symbread($urlsymb);
4753: if ($symb) {
4754: my $key=$env{'request.course.id'}."\0".$symb;
4755: my ($result,$cached)=&is_cached_new('title',$key);
4756: if (defined($cached)) {
4757: return $result;
4758: }
4759: my ($map,$resid,$url)=&decode_symb($symb);
4760: my $title='';
4761: my %bighash;
4762: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4763: &GDBM_READER(),0640)) {
4764: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4765: $title=$bighash{'title_'.$mapid.'.'.$resid};
4766: untie %bighash;
4767: }
4768: $title=~s/\&colon\;/\:/gs;
4769: if ($title) {
4770: return &do_cache_new('title',$key,$title,600);
4771: }
4772: $urlsymb=$url;
4773: }
4774: my $title=&metadata($urlsymb,'title');
4775: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
4776: return $title;
4777: }
4778:
4779: sub get_slot {
4780: my ($which,$cnum,$cdom)=@_;
4781: if (!$cnum || !$cdom) {
4782: (undef,my $courseid)=&Apache::lonxml::whichuser();
4783: $cdom=$env{'course.'.$courseid.'.domain'};
4784: $cnum=$env{'course.'.$courseid.'.num'};
4785: }
4786: my %slotinfo=&get('slots',[$which],$cdom,$cnum);
4787: &Apache::lonhomework::showhash(%slotinfo);
4788: my ($tmp)=keys(%slotinfo);
4789: if ($tmp=~/^error:/) { return (); }
4790: if (ref($slotinfo{$which}) eq 'HASH') {
4791: return %{$slotinfo{$which}};
4792: }
4793: return $slotinfo{$which};
4794: }
4795: # ------------------------------------------------- Update symbolic store links
4796:
4797: sub symblist {
4798: my ($mapname,%newhash)=@_;
4799: $mapname=&deversion(&declutter($mapname));
4800: my %hash;
4801: if (($env{'request.course.fn'}) && (%newhash)) {
4802: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
4803: &GDBM_WRCREAT(),0640)) {
4804: foreach (keys %newhash) {
4805: $hash{declutter($_)}=&encode_symb($mapname,$newhash{$_}->[1],
4806: $newhash{$_}->[0]);
4807: }
4808: if (untie(%hash)) {
4809: return 'ok';
4810: }
4811: }
4812: }
4813: return 'error';
4814: }
4815:
4816: # --------------------------------------------------------------- Verify a symb
4817:
4818: sub symbverify {
4819: my ($symb,$thisurl)=@_;
4820: my $thisfn=$thisurl;
4821: # wrapper not part of symbs
4822: $thisfn=~s/^\/adm\/wrapper//;
4823: $thisfn=&declutter($thisfn);
4824: # direct jump to resource in page or to a sequence - will construct own symbs
4825: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4826: # check URL part
4827: my ($map,$resid,$url)=&decode_symb($symb);
4828:
4829: unless ($url eq $thisfn) { return 0; }
4830:
4831: $symb=&symbclean($symb);
4832: $thisurl=&deversion($thisurl);
4833: $thisfn=&deversion($thisfn);
4834:
4835: my %bighash;
4836: my $okay=0;
4837:
4838: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4839: &GDBM_READER(),0640)) {
4840: my $ids=$bighash{'ids_'.&clutter($thisurl)};
4841: unless ($ids) {
4842: $ids=$bighash{'ids_/'.$thisurl};
4843: }
4844: if ($ids) {
4845: # ------------------------------------------------------------------- Has ID(s)
4846: foreach (split(/\,/,$ids)) {
4847: my ($mapid,$resid)=split(/\./,$_);
4848: if (
4849: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4850: eq $symb) {
4851: if (($env{'request.role.adv'}) ||
4852: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
4853: $okay=1;
4854: }
4855: }
4856: }
4857: }
4858: untie(%bighash);
4859: }
4860: return $okay;
4861: }
4862:
4863: # --------------------------------------------------------------- Clean-up symb
4864:
4865: sub symbclean {
4866: my $symb=shift;
4867: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
4868: # remove version from map
4869: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4870:
4871: # remove version from URL
4872: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4873:
4874: # remove wrapper
4875:
4876: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
4877: return $symb;
4878: }
4879:
4880: # ---------------------------------------------- Split symb to find map and url
4881:
4882: sub encode_symb {
4883: my ($map,$resid,$url)=@_;
4884: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4885: }
4886:
4887: sub decode_symb {
4888: my $symb=shift;
4889: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
4890: my ($map,$resid,$url)=split(/___/,$symb);
4891: return (&fixversion($map),$resid,&fixversion($url));
4892: }
4893:
4894: sub fixversion {
4895: my $fn=shift;
4896: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
4897: my %bighash;
4898: my $uri=&clutter($fn);
4899: my $key=$env{'request.course.id'}.'_'.$uri;
4900: # is this cached?
4901: my ($result,$cached)=&is_cached_new('courseresversion',$key);
4902: if (defined($cached)) { return $result; }
4903: # unfortunately not cached, or expired
4904: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4905: &GDBM_READER(),0640)) {
4906: if ($bighash{'version_'.$uri}) {
4907: my $version=$bighash{'version_'.$uri};
4908: unless (($version eq 'mostrecent') ||
4909: ($version==&getversion($uri))) {
4910: $uri=~s/\.(\w+)$/\.$version\.$1/;
4911: }
4912: }
4913: untie %bighash;
4914: }
4915: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
4916: }
4917:
4918: sub deversion {
4919: my $url=shift;
4920: $url=~s/\.\d+\.(\w+)$/\.$1/;
4921: return $url;
4922: }
4923:
4924: # ------------------------------------------------------ Return symb list entry
4925:
4926: sub symbread {
4927: my ($thisfn,$donotrecurse)=@_;
4928: my $cache_str='request.symbread.cached.'.$thisfn;
4929: if (defined($env{$cache_str})) { return $env{$cache_str}; }
4930: # no filename provided? try from environment
4931: unless ($thisfn) {
4932: if ($env{'request.symb'}) {
4933: return $env{$cache_str}=&symbclean($env{'request.symb'});
4934: }
4935: $thisfn=$env{'request.filename'};
4936: }
4937: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
4938: # is that filename actually a symb? Verify, clean, and return
4939: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4940: if (&symbverify($thisfn,$1)) {
4941: return $env{$cache_str}=&symbclean($thisfn);
4942: }
4943: }
4944: $thisfn=declutter($thisfn);
4945: my %hash;
4946: my %bighash;
4947: my $syval='';
4948: if (($env{'request.course.fn'}) && ($thisfn)) {
4949: my $targetfn = $thisfn;
4950: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4951: $targetfn = 'adm/wrapper/'.$thisfn;
4952: }
4953: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
4954: &GDBM_READER(),0640)) {
4955: $syval=$hash{$targetfn};
4956: untie(%hash);
4957: }
4958: # ---------------------------------------------------------- There was an entry
4959: if ($syval) {
4960: #unless ($syval=~/\_\d+$/) {
4961: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
4962: #&appenv('request.ambiguous' => $thisfn);
4963: #return $env{$cache_str}='';
4964: #}
4965: #$syval.=$1;
4966: #}
4967: } else {
4968: # ------------------------------------------------------- Was not in symb table
4969: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4970: &GDBM_READER(),0640)) {
4971: # ---------------------------------------------- Get ID(s) for current resource
4972: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4973: unless ($ids) {
4974: $ids=$bighash{'ids_/'.$thisfn};
4975: }
4976: unless ($ids) {
4977: # alias?
4978: $ids=$bighash{'mapalias_'.$thisfn};
4979: }
4980: if ($ids) {
4981: # ------------------------------------------------------------------- Has ID(s)
4982: my @possibilities=split(/\,/,$ids);
4983: if ($#possibilities==0) {
4984: # ----------------------------------------------- There is only one possibility
4985: my ($mapid,$resid)=split(/\./,$ids);
4986: $syval=&encode_symb($bighash{'map_id_'.$mapid},
4987: $resid,$thisfn);
4988: } elsif (!$donotrecurse) {
4989: # ------------------------------------------ There is more than one possibility
4990: my $realpossible=0;
4991: foreach (@possibilities) {
4992: my $file=$bighash{'src_'.$_};
4993: if (&allowed('bre',$file)) {
4994: my ($mapid,$resid)=split(/\./,$_);
4995: if ($bighash{'map_type_'.$mapid} ne 'page') {
4996: $realpossible++;
4997: $syval=&encode_symb($bighash{'map_id_'.$mapid},
4998: $resid,$thisfn);
4999: }
5000: }
5001: }
5002: if ($realpossible!=1) { $syval=''; }
5003: } else {
5004: $syval='';
5005: }
5006: }
5007: untie(%bighash)
5008: }
5009: }
5010: if ($syval) {
5011: return $env{$cache_str}=$syval;
5012: }
5013: }
5014: &appenv('request.ambiguous' => $thisfn);
5015: return $env{$cache_str}='';
5016: }
5017:
5018: # ---------------------------------------------------------- Return random seed
5019:
5020: sub numval {
5021: my $txt=shift;
5022: $txt=~tr/A-J/0-9/;
5023: $txt=~tr/a-j/0-9/;
5024: $txt=~tr/K-T/0-9/;
5025: $txt=~tr/k-t/0-9/;
5026: $txt=~tr/U-Z/0-5/;
5027: $txt=~tr/u-z/0-5/;
5028: $txt=~s/\D//g;
5029: if ($_64bit) { if ($txt > 2**32) { return -1; } }
5030: return int($txt);
5031: }
5032:
5033: sub numval2 {
5034: my $txt=shift;
5035: $txt=~tr/A-J/0-9/;
5036: $txt=~tr/a-j/0-9/;
5037: $txt=~tr/K-T/0-9/;
5038: $txt=~tr/k-t/0-9/;
5039: $txt=~tr/U-Z/0-5/;
5040: $txt=~tr/u-z/0-5/;
5041: $txt=~s/\D//g;
5042: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5043: my $total;
5044: foreach my $val (@txts) { $total+=$val; }
5045: if ($_64bit) { if ($total > 2**32) { return -1; } }
5046: return int($total);
5047: }
5048:
5049: sub numval3 {
5050: use integer;
5051: my $txt=shift;
5052: $txt=~tr/A-J/0-9/;
5053: $txt=~tr/a-j/0-9/;
5054: $txt=~tr/K-T/0-9/;
5055: $txt=~tr/k-t/0-9/;
5056: $txt=~tr/U-Z/0-5/;
5057: $txt=~tr/u-z/0-5/;
5058: $txt=~s/\D//g;
5059: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5060: my $total;
5061: foreach my $val (@txts) { $total+=$val; }
5062: if ($_64bit) { $total=(($total<<32)>>32); }
5063: return $total;
5064: }
5065:
5066: sub latest_rnd_algorithm_id {
5067: return '64bit4';
5068: }
5069:
5070: sub get_rand_alg {
5071: my ($courseid)=@_;
5072: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5073: if ($courseid) {
5074: return $env{"course.$courseid.rndseed"};
5075: }
5076: return &latest_rnd_algorithm_id();
5077: }
5078:
5079: sub validCODE {
5080: my ($CODE)=@_;
5081: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5082: return 0;
5083: }
5084:
5085: sub getCODE {
5086: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
5087: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
5088: defined($Apache::lonhomework::parsing_a_task) ) &&
5089: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5090: return $Apache::lonhomework::history{'resource.CODE'};
5091: }
5092: return undef;
5093: }
5094:
5095: sub rndseed {
5096: my ($symb,$courseid,$domain,$username)=@_;
5097:
5098: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5099: if (!$symb) {
5100: unless ($symb=$wsymb) { return time; }
5101: }
5102: if (!$courseid) { $courseid=$wcourseid; }
5103: if (!$domain) { $domain=$wdomain; }
5104: if (!$username) { $username=$wusername }
5105: my $which=&get_rand_alg();
5106: if (defined(&getCODE())) {
5107: if ($which eq '64bit4') {
5108: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5109: } else {
5110: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5111: }
5112: } elsif ($which eq '64bit4') {
5113: return &rndseed_64bit4($symb,$courseid,$domain,$username);
5114: } elsif ($which eq '64bit3') {
5115: return &rndseed_64bit3($symb,$courseid,$domain,$username);
5116: } elsif ($which eq '64bit2') {
5117: return &rndseed_64bit2($symb,$courseid,$domain,$username);
5118: } elsif ($which eq '64bit') {
5119: return &rndseed_64bit($symb,$courseid,$domain,$username);
5120: }
5121: return &rndseed_32bit($symb,$courseid,$domain,$username);
5122: }
5123:
5124: sub rndseed_32bit {
5125: my ($symb,$courseid,$domain,$username)=@_;
5126: {
5127: use integer;
5128: my $symbchck=unpack("%32C*",$symb) << 27;
5129: my $symbseed=numval($symb) << 22;
5130: my $namechck=unpack("%32C*",$username) << 17;
5131: my $nameseed=numval($username) << 12;
5132: my $domainseed=unpack("%32C*",$domain) << 7;
5133: my $courseseed=unpack("%32C*",$courseid);
5134: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
5135: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5136: #&Apache::lonxml::debug("rndseed :$num:$symb");
5137: if ($_64bit) { $num=(($num<<32)>>32); }
5138: return $num;
5139: }
5140: }
5141:
5142: sub rndseed_64bit {
5143: my ($symb,$courseid,$domain,$username)=@_;
5144: {
5145: use integer;
5146: my $symbchck=unpack("%32S*",$symb) << 21;
5147: my $symbseed=numval($symb) << 10;
5148: my $namechck=unpack("%32S*",$username);
5149:
5150: my $nameseed=numval($username) << 21;
5151: my $domainseed=unpack("%32S*",$domain) << 10;
5152: my $courseseed=unpack("%32S*",$courseid);
5153:
5154: my $num1=$symbchck+$symbseed+$namechck;
5155: my $num2=$nameseed+$domainseed+$courseseed;
5156: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5157: #&Apache::lonxml::debug("rndseed :$num:$symb");
5158: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5159: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5160: return "$num1,$num2";
5161: }
5162: }
5163:
5164: sub rndseed_64bit2 {
5165: my ($symb,$courseid,$domain,$username)=@_;
5166: {
5167: use integer;
5168: # strings need to be an even # of cahracters long, it it is odd the
5169: # last characters gets thrown away
5170: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5171: my $symbseed=numval($symb) << 10;
5172: my $namechck=unpack("%32S*",$username.' ');
5173:
5174: my $nameseed=numval($username) << 21;
5175: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5176: my $courseseed=unpack("%32S*",$courseid.' ');
5177:
5178: my $num1=$symbchck+$symbseed+$namechck;
5179: my $num2=$nameseed+$domainseed+$courseseed;
5180: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5181: #&Apache::lonxml::debug("rndseed :$num:$symb");
5182: return "$num1,$num2";
5183: }
5184: }
5185:
5186: sub rndseed_64bit3 {
5187: my ($symb,$courseid,$domain,$username)=@_;
5188: {
5189: use integer;
5190: # strings need to be an even # of cahracters long, it it is odd the
5191: # last characters gets thrown away
5192: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5193: my $symbseed=numval2($symb) << 10;
5194: my $namechck=unpack("%32S*",$username.' ');
5195:
5196: my $nameseed=numval2($username) << 21;
5197: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5198: my $courseseed=unpack("%32S*",$courseid.' ');
5199:
5200: my $num1=$symbchck+$symbseed+$namechck;
5201: my $num2=$nameseed+$domainseed+$courseseed;
5202: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5203: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5204: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5205:
5206: return "$num1:$num2";
5207: }
5208: }
5209:
5210: sub rndseed_64bit4 {
5211: my ($symb,$courseid,$domain,$username)=@_;
5212: {
5213: use integer;
5214: # strings need to be an even # of cahracters long, it it is odd the
5215: # last characters gets thrown away
5216: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5217: my $symbseed=numval3($symb) << 10;
5218: my $namechck=unpack("%32S*",$username.' ');
5219:
5220: my $nameseed=numval3($username) << 21;
5221: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5222: my $courseseed=unpack("%32S*",$courseid.' ');
5223:
5224: my $num1=$symbchck+$symbseed+$namechck;
5225: my $num2=$nameseed+$domainseed+$courseseed;
5226: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5227: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5228: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5229:
5230: return "$num1:$num2";
5231: }
5232: }
5233:
5234: sub rndseed_CODE_64bit {
5235: my ($symb,$courseid,$domain,$username)=@_;
5236: {
5237: use integer;
5238: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5239: my $symbseed=numval2($symb);
5240: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5241: my $CODEseed=numval(&getCODE());
5242: my $courseseed=unpack("%32S*",$courseid.' ');
5243: my $num1=$symbseed+$CODEchck;
5244: my $num2=$CODEseed+$courseseed+$symbchck;
5245: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5246: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5247: if ($_64bit) { $num1=(($num1<<32)>>32); }
5248: if ($_64bit) { $num2=(($num2<<32)>>32); }
5249: return "$num1:$num2";
5250: }
5251: }
5252:
5253: sub rndseed_CODE_64bit4 {
5254: my ($symb,$courseid,$domain,$username)=@_;
5255: {
5256: use integer;
5257: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5258: my $symbseed=numval3($symb);
5259: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5260: my $CODEseed=numval3(&getCODE());
5261: my $courseseed=unpack("%32S*",$courseid.' ');
5262: my $num1=$symbseed+$CODEchck;
5263: my $num2=$CODEseed+$courseseed+$symbchck;
5264: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5265: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5266: if ($_64bit) { $num1=(($num1<<32)>>32); }
5267: if ($_64bit) { $num2=(($num2<<32)>>32); }
5268: return "$num1:$num2";
5269: }
5270: }
5271:
5272: sub setup_random_from_rndseed {
5273: my ($rndseed)=@_;
5274: if ($rndseed =~/([,:])/) {
5275: my ($num1,$num2)=split(/[,:]/,$rndseed);
5276: &Math::Random::random_set_seed(abs($num1),abs($num2));
5277: } else {
5278: &Math::Random::random_set_seed_from_phrase($rndseed);
5279: }
5280: }
5281:
5282: sub latest_receipt_algorithm_id {
5283: return 'receipt2';
5284: }
5285:
5286: sub recunique {
5287: my $fucourseid=shift;
5288: my $unique;
5289: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5290: $unique=$env{"course.$fucourseid.internal.encseed"};
5291: } else {
5292: $unique=$perlvar{'lonReceipt'};
5293: }
5294: return unpack("%32C*",$unique);
5295: }
5296:
5297: sub recprefix {
5298: my $fucourseid=shift;
5299: my $prefix;
5300: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5301: $prefix=$env{"course.$fucourseid.internal.encpref"};
5302: } else {
5303: $prefix=$perlvar{'lonHostID'};
5304: }
5305: return unpack("%32C*",$prefix);
5306: }
5307:
5308: sub ireceipt {
5309: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
5310: my $cuname=unpack("%32C*",$funame);
5311: my $cudom=unpack("%32C*",$fudom);
5312: my $cucourseid=unpack("%32C*",$fucourseid);
5313: my $cusymb=unpack("%32C*",$fusymb);
5314: my $cunique=&recunique($fucourseid);
5315: my $cpart=unpack("%32S*",$part);
5316: my $return =&recprefix($fucourseid).'-';
5317: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
5318: $env{'request.state'} eq 'construct') {
5319: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
5320: " and ".($cpart%$cudom));
5321:
5322: $return.= ($cunique%$cuname+
5323: $cunique%$cudom+
5324: $cusymb%$cuname+
5325: $cusymb%$cudom+
5326: $cucourseid%$cuname+
5327: $cucourseid%$cudom+
5328: $cpart%$cuname+
5329: $cpart%$cudom);
5330: } else {
5331: $return.= ($cunique%$cuname+
5332: $cunique%$cudom+
5333: $cusymb%$cuname+
5334: $cusymb%$cudom+
5335: $cucourseid%$cuname+
5336: $cucourseid%$cudom);
5337: }
5338: return $return;
5339: }
5340:
5341: sub receipt {
5342: my ($part)=@_;
5343: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5344: return &ireceipt($name,$domain,$courseid,$symb,$part);
5345: }
5346:
5347: # ------------------------------------------------------------ Serves up a file
5348: # returns either the contents of the file or
5349: # -1 if the file doesn't exist
5350: #
5351: # if the target is a file that was uploaded via DOCS,
5352: # a check will be made to see if a current copy exists on the local server,
5353: # if it does this will be served, otherwise a copy will be retrieved from
5354: # the home server for the course and stored in /home/httpd/html/userfiles on
5355: # the local server.
5356:
5357: sub getfile {
5358: my ($file) = @_;
5359: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5360: &repcopy($file);
5361: return &readfile($file);
5362: }
5363:
5364: sub repcopy_userfile {
5365: my ($file)=@_;
5366: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5367: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
5368: my ($cdom,$cnum,$filename) =
5369: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5370: my ($info,$rtncode);
5371: my $uri="/uploaded/$cdom/$cnum/$filename";
5372: if (-e "$file") {
5373: my @fileinfo = stat($file);
5374: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5375: if ($lwpresp ne 'ok') {
5376: if ($rtncode eq '404') {
5377: unlink($file);
5378: }
5379: #my $ua=new LWP::UserAgent;
5380: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5381: #my $response=$ua->request($request);
5382: #if ($response->is_success()) {
5383: # return $response->content;
5384: # } else {
5385: # return -1;
5386: # }
5387: return -1;
5388: }
5389: if ($info < $fileinfo[9]) {
5390: return 'ok';
5391: }
5392: $info = '';
5393: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5394: if ($lwpresp ne 'ok') {
5395: return -1;
5396: }
5397: } else {
5398: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5399: if ($lwpresp ne 'ok') {
5400: my $ua=new LWP::UserAgent;
5401: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5402: my $response=$ua->request($request);
5403: if ($response->is_success()) {
5404: $info=$response->content;
5405: } else {
5406: return -1;
5407: }
5408: }
5409: my @parts = ($cdom,$cnum);
5410: if ($filename =~ m|^(.+)/[^/]+$|) {
5411: push @parts, split(/\//,$1);
5412: }
5413: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
5414: foreach my $part (@parts) {
5415: $path .= '/'.$part;
5416: if (!-e $path) {
5417: mkdir($path,0770);
5418: }
5419: }
5420: }
5421: open(FILE,">$file");
5422: print FILE $info;
5423: close(FILE);
5424: return 'ok';
5425: }
5426:
5427: sub tokenwrapper {
5428: my $uri=shift;
5429: $uri=~s|^http\://([^/]+)||;
5430: $uri=~s|^/||;
5431: $env{'user.environment'}=~/\/([^\/]+)\.id/;
5432: my $token=$1;
5433: my (undef,$udom,$uname,$file)=split('/',$uri,4);
5434: if ($udom && $uname && $file) {
5435: $file=~s|(\?\.*)*$||;
5436: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
5437: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
5438: (($uri=~/\?/)?'&':'?').'token='.$token.
5439: '&tokenissued='.$perlvar{'lonHostID'};
5440: } else {
5441: return '/adm/notfound.html';
5442: }
5443: }
5444:
5445: sub getuploaded {
5446: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5447: $uri=~s/^\///;
5448: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
5449: my $ua=new LWP::UserAgent;
5450: my $request=new HTTP::Request($reqtype,$uri);
5451: my $response=$ua->request($request);
5452: $$rtncode = $response->code;
5453: if (! $response->is_success()) {
5454: return 'failed';
5455: }
5456: if ($reqtype eq 'HEAD') {
5457: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
5458: } elsif ($reqtype eq 'GET') {
5459: $$info = $response->content;
5460: }
5461: return 'ok';
5462: }
5463:
5464: sub readfile {
5465: my $file = shift;
5466: if ( (! -e $file ) || ($file eq '') ) { return -1; };
5467: my $fh;
5468: open($fh,"<$file");
5469: my $a='';
5470: while (<$fh>) { $a .=$_; }
5471: return $a;
5472: }
5473:
5474: sub filelocation {
5475: my ($dir,$file) = @_;
5476: my $location;
5477: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
5478: if ($file=~m:^/~:) { # is a contruction space reference
5479: $location = $file;
5480: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
5481: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
5482: my ($udom,$uname,$filename)=
5483: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
5484: my $home=&homeserver($uname,$udom);
5485: my $is_me=0;
5486: my @ids=¤t_machine_ids();
5487: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
5488: if ($is_me) {
5489: $location=&Apache::loncommon::propath($udom,$uname).
5490: '/userfiles/'.$filename;
5491: } else {
5492: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
5493: $udom.'/'.$uname.'/'.$filename;
5494: }
5495: } else {
5496: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5497: $file=~s:^/res/:/:;
5498: if ( !( $file =~ m:^/:) ) {
5499: $location = $dir. '/'.$file;
5500: } else {
5501: $location = '/home/httpd/html/res'.$file;
5502: }
5503: }
5504: $location=~s://+:/:g; # remove duplicate /
5505: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
5506: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
5507: return $location;
5508: }
5509:
5510: sub hreflocation {
5511: my ($dir,$file)=@_;
5512: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
5513: my $finalpath=filelocation($dir,$file);
5514: $finalpath=~s-^/home/httpd/html--;
5515: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
5516: return $finalpath;
5517: } elsif ($file=~m-^/home-) {
5518: $file=~s-^/home/httpd/html--;
5519: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
5520: return $file;
5521: }
5522: return $file;
5523: }
5524:
5525: sub current_machine_domains {
5526: my $hostname=$hostname{$perlvar{'lonHostID'}};
5527: my @domains;
5528: while( my($id, $name) = each(%hostname)) {
5529: # &logthis("-$id-$name-$hostname-");
5530: if ($hostname eq $name) {
5531: push(@domains,$hostdom{$id});
5532: }
5533: }
5534: return @domains;
5535: }
5536:
5537: sub current_machine_ids {
5538: my $hostname=$hostname{$perlvar{'lonHostID'}};
5539: my @ids;
5540: while( my($id, $name) = each(%hostname)) {
5541: # &logthis("-$id-$name-$hostname-");
5542: if ($hostname eq $name) {
5543: push(@ids,$id);
5544: }
5545: }
5546: return @ids;
5547: }
5548:
5549: # ------------------------------------------------------------- Declutters URLs
5550:
5551: sub declutter {
5552: my $thisfn=shift;
5553: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5554: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5555: $thisfn=~s/^\///;
5556: $thisfn=~s/^res\///;
5557: $thisfn=~s/\?.+$//;
5558: return $thisfn;
5559: }
5560:
5561: # ------------------------------------------------------------- Clutter up URLs
5562:
5563: sub clutter {
5564: my $thisfn='/'.&declutter(shift);
5565: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
5566: $thisfn='/res'.$thisfn;
5567: }
5568: return $thisfn;
5569: }
5570:
5571: sub freeze_escape {
5572: my ($value)=@_;
5573: if (ref($value)) {
5574: $value=&nfreeze($value);
5575: return '__FROZEN__'.&escape($value);
5576: }
5577: return &escape($value);
5578: }
5579:
5580: # -------------------------------------------------------- Escape Special Chars
5581:
5582: sub escape {
5583: my $str=shift;
5584: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
5585: return $str;
5586: }
5587:
5588: # ----------------------------------------------------- Un-Escape Special Chars
5589:
5590: sub unescape {
5591: my $str=shift;
5592: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
5593: return $str;
5594: }
5595:
5596: sub thaw_unescape {
5597: my ($value)=@_;
5598: if ($value =~ /^__FROZEN__/) {
5599: substr($value,0,10,undef);
5600: $value=&unescape($value);
5601: return &thaw($value);
5602: }
5603: return &unescape($value);
5604: }
5605:
5606: sub mod_perl_version {
5607: return 1;
5608: if (defined($perlvar{'MODPERL2'})) {
5609: return 2;
5610: }
5611: }
5612:
5613: sub correct_line_ends {
5614: my ($result)=@_;
5615: $$result =~s/\r\n/\n/mg;
5616: $$result =~s/\r/\n/mg;
5617: }
5618: # ================================================================ Main Program
5619:
5620: sub goodbye {
5621: &logthis("Starting Shut down");
5622: #not converted to using infrastruture and probably shouldn't be
5623: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
5624: #converted
5625: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
5626: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
5627: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
5628: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
5629: #1.1 only
5630: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
5631: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
5632: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
5633: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
5634: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
5635: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
5636: &logthis(sprintf("%-20s is %s",'hits',$hits));
5637: &flushcourselogs();
5638: &logthis("Shutting down");
5639: return DONE;
5640: }
5641:
5642: BEGIN {
5643: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
5644: unless ($readit) {
5645: {
5646: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
5647: open(my $config,"</etc/httpd/conf/loncapa.conf");
5648:
5649: while (my $configline=<$config>) {
5650: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
5651: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5652: chomp($varvalue);
5653: $perlvar{$varname}=$varvalue;
5654: }
5655: }
5656: close($config);
5657: }
5658: {
5659: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
5660:
5661: while (my $configline=<$config>) {
5662: if ($configline =~ /^[^\#]*PerlSetVar/) {
5663: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5664: chomp($varvalue);
5665: $perlvar{$varname}=$varvalue;
5666: }
5667: }
5668: close($config);
5669: }
5670:
5671: # ------------------------------------------------------------ Read domain file
5672: {
5673: %domaindescription = ();
5674: %domain_auth_def = ();
5675: %domain_auth_arg_def = ();
5676: my $fh;
5677: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
5678: while (<$fh>) {
5679: next if (/^(\#|\s*$)/);
5680: # next if /^\#/;
5681: chomp;
5682: my ($domain, $domain_description, $def_auth, $def_auth_arg,
5683: $def_lang, $city, $longi, $lati) = split(/:/,$_);
5684: $domain_auth_def{$domain}=$def_auth;
5685: $domain_auth_arg_def{$domain}=$def_auth_arg;
5686: $domaindescription{$domain}=$domain_description;
5687: $domain_lang_def{$domain}=$def_lang;
5688: $domain_city{$domain}=$city;
5689: $domain_longi{$domain}=$longi;
5690: $domain_lati{$domain}=$lati;
5691:
5692: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
5693: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
5694: }
5695: }
5696: close ($fh);
5697: }
5698:
5699:
5700: # ------------------------------------------------------------- Read hosts file
5701: {
5702: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
5703:
5704: while (my $configline=<$config>) {
5705: next if ($configline =~ /^(\#|\s*$)/);
5706: chomp($configline);
5707: my ($id,$domain,$role,$name)=split(/:/,$configline);
5708: $name=~s/\s//g;
5709: if ($id && $domain && $role && $name) {
5710: $hostname{$id}=$name;
5711: $hostdom{$id}=$domain;
5712: if ($role eq 'library') { $libserv{$id}=$name; }
5713: }
5714: }
5715: close($config);
5716: # FIXME: dev server don't want this, production servers _do_ want this
5717: #&get_iphost();
5718: }
5719:
5720: sub get_iphost {
5721: if (%iphost) { return %iphost; }
5722: foreach my $id (keys(%hostname)) {
5723: my $name=$hostname{$id};
5724: my $ip = gethostbyname($name);
5725: if (!$ip || length($ip) ne 4) {
5726: &logthis("Skipping host $id name $name no IP found\n");
5727: next;
5728: }
5729: $ip=inet_ntoa($ip);
5730: push(@{$iphost{$ip}},$id);
5731: }
5732: return %iphost;
5733: }
5734:
5735: # ------------------------------------------------------ Read spare server file
5736: {
5737: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
5738:
5739: while (my $configline=<$config>) {
5740: chomp($configline);
5741: if ($configline) {
5742: $spareid{$configline}=1;
5743: }
5744: }
5745: close($config);
5746: }
5747: # ------------------------------------------------------------ Read permissions
5748: {
5749: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
5750:
5751: while (my $configline=<$config>) {
5752: chomp($configline);
5753: if ($configline) {
5754: my ($role,$perm)=split(/ /,$configline);
5755: if ($perm ne '') { $pr{$role}=$perm; }
5756: }
5757: }
5758: close($config);
5759: }
5760:
5761: # -------------------------------------------- Read plain texts for permissions
5762: {
5763: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
5764:
5765: while (my $configline=<$config>) {
5766: chomp($configline);
5767: if ($configline) {
5768: my ($short,$plain)=split(/:/,$configline);
5769: if ($plain ne '') { $prp{$short}=$plain; }
5770: }
5771: }
5772: close($config);
5773: }
5774:
5775: # ---------------------------------------------------------- Read package table
5776: {
5777: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
5778:
5779: while (my $configline=<$config>) {
5780: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
5781: chomp($configline);
5782: my ($short,$plain)=split(/:/,$configline);
5783: my ($pack,$name)=split(/\&/,$short);
5784: if ($plain ne '') {
5785: $packagetab{$pack.'&'.$name.'&name'}=$name;
5786: $packagetab{$short}=$plain;
5787: }
5788: }
5789: close($config);
5790: }
5791:
5792: # ------------- set up temporary directory
5793: {
5794: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
5795:
5796: }
5797:
5798: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
5799:
5800: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
5801: $dumpcount=0;
5802:
5803: &logtouch();
5804: &logthis('<font color=yellow>INFO: Read configuration</font>');
5805: $readit=1;
5806: {
5807: use integer;
5808: my $test=(2**32)+1;
5809: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
5810: &logthis(" Detected 64bit platform ($_64bit)");
5811: }
5812: }
5813: }
5814:
5815: 1;
5816: __END__
5817:
5818: =pod
5819:
5820: =head1 NAME
5821:
5822: Apache::lonnet - Subroutines to ask questions about things in the network.
5823:
5824: =head1 SYNOPSIS
5825:
5826: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
5827:
5828: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
5829:
5830: Common parameters:
5831:
5832: =over 4
5833:
5834: =item *
5835:
5836: $uname : an internal username (if $cname expecting a course Id specifically)
5837:
5838: =item *
5839:
5840: $udom : a domain (if $cdom expecting a course's domain specifically)
5841:
5842: =item *
5843:
5844: $symb : a resource instance identifier
5845:
5846: =item *
5847:
5848: $namespace : the name of a .db file that contains the data needed or
5849: being set.
5850:
5851: =back
5852:
5853: =head1 OVERVIEW
5854:
5855: lonnet provides subroutines which interact with the
5856: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
5857: about classes, users, and resources.
5858:
5859: For many of these objects you can also use this to store data about
5860: them or modify them in various ways.
5861:
5862: =head2 Symbs
5863:
5864: To identify a specific instance of a resource, LON-CAPA uses symbols
5865: or "symbs"X<symb>. These identifiers are built from the URL of the
5866: map, the resource number of the resource in the map, and the URL of
5867: the resource itself. The latter is somewhat redundant, but might help
5868: if maps change.
5869:
5870: An example is
5871:
5872: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
5873:
5874: The respective map entry is
5875:
5876: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5877: title="Problem 2">
5878: </resource>
5879:
5880: Symbs are used by the random number generator, as well as to store and
5881: restore data specific to a certain instance of for example a problem.
5882:
5883: =head2 Storing And Retrieving Data
5884:
5885: X<store()>X<cstore()>X<restore()>Three of the most important functions
5886: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5887: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5888: is is the non-critical message twin of cstore. These functions are for
5889: handlers to store a perl hash to a user's permanent data space in an
5890: easy manner, and to retrieve it again on another call. It is expected
5891: that a handler would use this once at the beginning to retrieve data,
5892: and then again once at the end to send only the new data back.
5893:
5894: The data is stored in the user's data directory on the user's
5895: homeserver under the ID of the course.
5896:
5897: The hash that is returned by restore will have all of the previous
5898: value for all of the elements of the hash.
5899:
5900: Example:
5901:
5902: #creating a hash
5903: my %hash;
5904: $hash{'foo'}='bar';
5905:
5906: #storing it
5907: &Apache::lonnet::cstore(\%hash);
5908:
5909: #changing a value
5910: $hash{'foo'}='notbar';
5911:
5912: #adding a new value
5913: $hash{'bar'}='foo';
5914: &Apache::lonnet::cstore(\%hash);
5915:
5916: #retrieving the hash
5917: my %history=&Apache::lonnet::restore();
5918:
5919: #print the hash
5920: foreach my $key (sort(keys(%history))) {
5921: print("\%history{$key} = $history{$key}");
5922: }
5923:
5924: Will print out:
5925:
5926: %history{1:foo} = bar
5927: %history{1:keys} = foo:timestamp
5928: %history{1:timestamp} = 990455579
5929: %history{2:bar} = foo
5930: %history{2:foo} = notbar
5931: %history{2:keys} = foo:bar:timestamp
5932: %history{2:timestamp} = 990455580
5933: %history{bar} = foo
5934: %history{foo} = notbar
5935: %history{timestamp} = 990455580
5936: %history{version} = 2
5937:
5938: Note that the special hash entries C<keys>, C<version> and
5939: C<timestamp> were added to the hash. C<version> will be equal to the
5940: total number of versions of the data that have been stored. The
5941: C<timestamp> attribute will be the UNIX time the hash was
5942: stored. C<keys> is available in every historical section to list which
5943: keys were added or changed at a specific historical revision of a
5944: hash.
5945:
5946: B<Warning>: do not store the hash that restore returns directly. This
5947: will cause a mess since it will restore the historical keys as if the
5948: were new keys. I.E. 1:foo will become 1:1:foo etc.
5949:
5950: Calling convention:
5951:
5952: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5953: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
5954:
5955: For more detailed information, see lonnet specific documentation.
5956:
5957: =head1 RETURN MESSAGES
5958:
5959: =over 4
5960:
5961: =item * B<con_lost>: unable to contact remote host
5962:
5963: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5964: when the connection is brought back up
5965:
5966: =item * B<con_failed>: unable to contact remote host and unable to save message
5967: for later delivery
5968:
5969: =item * B<error:>: an error a occured, a description of the error follows the :
5970:
5971: =item * B<no_such_host>: unable to fund a host associated with the user/domain
5972: that was requested
5973:
5974: =back
5975:
5976: =head1 PUBLIC SUBROUTINES
5977:
5978: =head2 Session Environment Functions
5979:
5980: =over 4
5981:
5982: =item *
5983: X<appenv()>
5984: B<appenv(%hash)>: the value of %hash is written to
5985: the user envirnoment file, and will be restored for each access this
5986: user makes during this session, also modifies the %env for the current
5987: process
5988:
5989: =item *
5990: X<delenv()>
5991: B<delenv($regexp)>: removes all items from the session
5992: environment file that matches the regular expression in $regexp. The
5993: values are also delted from the current processes %env.
5994:
5995: =back
5996:
5997: =head2 User Information
5998:
5999: =over 4
6000:
6001: =item *
6002: X<queryauthenticate()>
6003: B<queryauthenticate($uname,$udom)>: try to determine user's current
6004: authentication scheme
6005:
6006: =item *
6007: X<authenticate()>
6008: B<authenticate($uname,$upass,$udom)>: try to
6009: authenticate user from domain's lib servers (first use the current
6010: one). C<$upass> should be the users password.
6011:
6012: =item *
6013: X<homeserver()>
6014: B<homeserver($uname,$udom)>: find the server which has
6015: the user's directory and files (there must be only one), this caches
6016: the answer, and also caches if there is a borken connection.
6017:
6018: =item *
6019: X<idget()>
6020: B<idget($udom,@ids)>: find the usernames behind a list of IDs
6021: (IDs are a unique resource in a domain, there must be only 1 ID per
6022: username, and only 1 username per ID in a specific domain) (returns
6023: hash: id=>name,id=>name)
6024:
6025: =item *
6026: X<idrget()>
6027: B<idrget($udom,@unames)>: find the IDs behind a list of
6028: usernames (returns hash: name=>id,name=>id)
6029:
6030: =item *
6031: X<idput()>
6032: B<idput($udom,%ids)>: store away a list of names and associated IDs
6033:
6034: =item *
6035: X<rolesinit()>
6036: B<rolesinit($udom,$username,$authhost)>: get user privileges
6037:
6038: =item *
6039: X<getsection()>
6040: B<getsection($udom,$uname,$cname)>: finds the section of student in the
6041: course $cname, return section name/number or '' for "not in course"
6042: and '-1' for "no section"
6043:
6044: =item *
6045: X<userenvironment()>
6046: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
6047: passed in @what from the requested user's environment, returns a hash
6048:
6049: =back
6050:
6051: =head2 User Roles
6052:
6053: =over 4
6054:
6055: =item *
6056:
6057: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
6058: actions
6059: F: full access
6060: U,I,K: authentication modes (cxx only)
6061: '': forbidden
6062: 1: user needs to choose course
6063: 2: browse allowed
6064:
6065: =item *
6066:
6067: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
6068: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
6069: and course level
6070:
6071: =item *
6072:
6073: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
6074: explanation of a user role term
6075:
6076: =back
6077:
6078: =head2 User Modification
6079:
6080: =over 4
6081:
6082: =item *
6083:
6084: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
6085: user for the level given by URL. Optional start and end dates (leave empty
6086: string or zero for "no date")
6087:
6088: =item *
6089:
6090: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
6091: change a users, password, possible return values are: ok,
6092: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
6093: refused
6094:
6095: =item *
6096:
6097: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
6098:
6099: =item *
6100:
6101: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
6102: modify user
6103:
6104: =item *
6105:
6106: modifystudent
6107:
6108: modify a students enrollment and identification information.
6109: The course id is resolved based on the current users environment.
6110: This means the envoking user must be a course coordinator or otherwise
6111: associated with a course.
6112:
6113: This call is essentially a wrapper for lonnet::modifyuser and
6114: lonnet::modify_student_enrollment
6115:
6116: Inputs:
6117:
6118: =over 4
6119:
6120: =item B<$udom> Students loncapa domain
6121:
6122: =item B<$uname> Students loncapa login name
6123:
6124: =item B<$uid> Students id/student number
6125:
6126: =item B<$umode> Students authentication mode
6127:
6128: =item B<$upass> Students password
6129:
6130: =item B<$first> Students first name
6131:
6132: =item B<$middle> Students middle name
6133:
6134: =item B<$last> Students last name
6135:
6136: =item B<$gene> Students generation
6137:
6138: =item B<$usec> Students section in course
6139:
6140: =item B<$end> Unix time of the roles expiration
6141:
6142: =item B<$start> Unix time of the roles start date
6143:
6144: =item B<$forceid> If defined, allow $uid to be changed
6145:
6146: =item B<$desiredhome> server to use as home server for student
6147:
6148: =back
6149:
6150: =item *
6151:
6152: modify_student_enrollment
6153:
6154: Change a students enrollment status in a class. The environment variable
6155: 'role.request.course' must be defined for this function to proceed.
6156:
6157: Inputs:
6158:
6159: =over 4
6160:
6161: =item $udom, students domain
6162:
6163: =item $uname, students name
6164:
6165: =item $uid, students user id
6166:
6167: =item $first, students first name
6168:
6169: =item $middle
6170:
6171: =item $last
6172:
6173: =item $gene
6174:
6175: =item $usec
6176:
6177: =item $end
6178:
6179: =item $start
6180:
6181: =back
6182:
6183:
6184: =item *
6185:
6186: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
6187: custom role; give a custom role to a user for the level given by URL. Specify
6188: name and domain of role author, and role name
6189:
6190: =item *
6191:
6192: revokerole($udom,$uname,$url,$role) : revoke a role for url
6193:
6194: =item *
6195:
6196: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
6197:
6198: =back
6199:
6200: =head2 Course Infomation
6201:
6202: =over 4
6203:
6204: =item *
6205:
6206: coursedescription($courseid) : returns a hash of information about the
6207: specified course id, including all environment settings for the
6208: course, the description of the course will be in the hash under the
6209: key 'description'
6210:
6211: =item *
6212:
6213: resdata($name,$domain,$type,@which) : request for current parameter
6214: setting for a specific $type, where $type is either 'course' or 'user',
6215: @what should be a list of parameters to ask about. This routine caches
6216: answers for 5 minutes.
6217:
6218: =back
6219:
6220: =head2 Course Modification
6221:
6222: =over 4
6223:
6224: =item *
6225:
6226: writecoursepref($courseid,%prefs) : write preferences (environment
6227: database) for a course
6228:
6229: =item *
6230:
6231: createcourse($udom,$description,$url) : make/modify course
6232:
6233: =back
6234:
6235: =head2 Resource Subroutines
6236:
6237: =over 4
6238:
6239: =item *
6240:
6241: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
6242:
6243: =item *
6244:
6245: repcopy($filename) : subscribes to the requested file, and attempts to
6246: replicate from the owning library server, Might return
6247: 'unavailable', 'not_found', 'forbidden', 'ok', or
6248: 'bad_request', also attempts to grab the metadata for the
6249: resource. Expects the local filesystem pathname
6250: (/home/httpd/html/res/....)
6251:
6252: =back
6253:
6254: =head2 Resource Information
6255:
6256: =over 4
6257:
6258: =item *
6259:
6260: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
6261: a vairety of different possible values, $varname should be a request
6262: string, and the other parameters can be used to specify who and what
6263: one is asking about.
6264:
6265: Possible values for $varname are environment.lastname (or other item
6266: from the envirnment hash), user.name (or someother aspect about the
6267: user), resource.0.maxtries (or some other part and parameter of a
6268: resource)
6269:
6270: =item *
6271:
6272: directcondval($number) : get current value of a condition; reads from a state
6273: string
6274:
6275: =item *
6276:
6277: condval($condidx) : value of condition index based on state
6278:
6279: =item *
6280:
6281: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
6282: resource's metadata, $what should be either a specific key, or either
6283: 'keys' (to get a list of possible keys) or 'packages' to get a list of
6284: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
6285:
6286: this function automatically caches all requests
6287:
6288: =item *
6289:
6290: metadata_query($query,$custom,$customshow) : make a metadata query against the
6291: network of library servers; returns file handle of where SQL and regex results
6292: will be stored for query
6293:
6294: =item *
6295:
6296: symbread($filename) : return symbolic list entry (filename argument optional);
6297: returns the data handle
6298:
6299: =item *
6300:
6301: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
6302: a possible symb for the URL in $thisfn, and if is an encryypted
6303: resource that the user accessed using /enc/ returns a 1 on success, 0
6304: on failure, user must be in a course, as it assumes the existance of
6305: the course initial hash, and uses $env('request.course.id'}
6306:
6307:
6308: =item *
6309:
6310: symbclean($symb) : removes versions numbers from a symb, returns the
6311: cleaned symb
6312:
6313: =item *
6314:
6315: is_on_map($uri) : checks if the $uri is somewhere on the current
6316: course map, user must be in a course for it to work.
6317:
6318: =item *
6319:
6320: numval($salt) : return random seed value (addend for rndseed)
6321:
6322: =item *
6323:
6324: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
6325: a random seed, all arguments are optional, if they aren't sent it uses the
6326: environment to derive them. Note: if symb isn't sent and it can't get one
6327: from &symbread it will use the current time as its return value
6328:
6329: =item *
6330:
6331: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
6332: unfakeable, receipt
6333:
6334: =item *
6335:
6336: receipt() : API to ireceipt working off of env values; given out to users
6337:
6338: =item *
6339:
6340: countacc($url) : count the number of accesses to a given URL
6341:
6342: =item *
6343:
6344: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
6345:
6346: =item *
6347:
6348: checkin($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 $tcrsid)
6349:
6350: =item *
6351:
6352: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
6353:
6354: =item *
6355:
6356: devalidate($symb) : devalidate temporary spreadsheet calculations,
6357: forcing spreadsheet to reevaluate the resource scores next time.
6358:
6359: =back
6360:
6361: =head2 Storing/Retreiving Data
6362:
6363: =over 4
6364:
6365: =item *
6366:
6367: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
6368: for this url; hashref needs to be given and should be a \%hashname; the
6369: remaining args aren't required and if they aren't passed or are '' they will
6370: be derived from the env
6371:
6372: =item *
6373:
6374: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
6375: uses critical subroutine
6376:
6377: =item *
6378:
6379: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
6380: all args are optional
6381:
6382: =item *
6383:
6384: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
6385: works very similar to store/cstore, but all data is stored in a
6386: temporary location and can be reset using tmpreset, $storehash should
6387: be a hash reference, returns nothing on success
6388:
6389: =item *
6390:
6391: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
6392: similar to restore, but all data is stored in a temporary location and
6393: can be reset using tmpreset. Returns a hash of values on success,
6394: error string otherwise.
6395:
6396: =item *
6397:
6398: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
6399: deltes all keys for $symb form the temporary storage hash.
6400:
6401: =item *
6402:
6403: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6404: reference filled in from namesp ($udom and $uname are optional)
6405:
6406: =item *
6407:
6408: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
6409: namesp ($udom and $uname are optional)
6410:
6411: =item *
6412:
6413: dump($namespace,$udom,$uname,$regexp) :
6414: dumps the complete (or key matching regexp) namespace into a hash
6415: ($udom, $uname and $regexp are optional)
6416:
6417: =item *
6418:
6419: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
6420: $store can be a scalar, an array reference, or if the amount to be
6421: incremented is > 1, a hash reference.
6422:
6423: ($udom and $uname are optional)
6424:
6425: =item *
6426:
6427: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
6428: ($udom and $uname are optional)
6429:
6430: =item *
6431:
6432: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
6433: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
6434: used in records written by &store and retrieved by &restore. This function
6435: was created for use in editing discussion posts, without incrementing the
6436: version number included in the key for a particular post. The colon
6437: separated list of attribute names (e.g., the value associated with the key
6438: 1:keys:$symb) is also generated and passed in the ampersand separated
6439: items sent to lonnet::reply().
6440:
6441: =item *
6442:
6443: cput($namespace,$storehash,$udom,$uname) : critical put
6444: ($udom and $uname are optional)
6445:
6446: =item *
6447:
6448: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6449: reference filled in from namesp (encrypts the return communication)
6450: ($udom and $uname are optional)
6451:
6452: =item *
6453:
6454: log($udom,$name,$home,$message) : write to permanent log for user; use
6455: critical subroutine
6456:
6457: =back
6458:
6459: =head2 Network Status Functions
6460:
6461: =over 4
6462:
6463: =item *
6464:
6465: dirlist($uri) : return directory list based on URI
6466:
6467: =item *
6468:
6469: spareserver() : find server with least workload from spare.tab
6470:
6471: =back
6472:
6473: =head2 Apache Request
6474:
6475: =over 4
6476:
6477: =item *
6478:
6479: ssi($url,%hash) : server side include, does a complete request cycle on url to
6480: localhost, posts hash
6481:
6482: =back
6483:
6484: =head2 Data to String to Data
6485:
6486: =over 4
6487:
6488: =item *
6489:
6490: hash2str(%hash) : convert a hash into a string complete with escaping and '='
6491: and '&' separators, supports elements that are arrayrefs and hashrefs
6492:
6493: =item *
6494:
6495: hashref2str($hashref) : convert a hashref into a string complete with
6496: escaping and '=' and '&' separators, supports elements that are
6497: arrayrefs and hashrefs
6498:
6499: =item *
6500:
6501: arrayref2str($arrayref) : convert an arrayref into a string complete
6502: with escaping and '&' separators, supports elements that are arrayrefs
6503: and hashrefs
6504:
6505: =item *
6506:
6507: str2hash($string) : convert string to hash using unescaping and
6508: splitting on '=' and '&', supports elements that are arrayrefs and
6509: hashrefs
6510:
6511: =item *
6512:
6513: str2array($string) : convert string to hash using unescaping and
6514: splitting on '&', supports elements that are arrayrefs and hashrefs
6515:
6516: =back
6517:
6518: =head2 Logging Routines
6519:
6520: =over 4
6521:
6522: These routines allow one to make log messages in the lonnet.log and
6523: lonnet.perm logfiles.
6524:
6525: =item *
6526:
6527: logtouch() : make sure the logfile, lonnet.log, exists
6528:
6529: =item *
6530:
6531: logthis() : append message to the normal lonnet.log file, it gets
6532: preiodically rolled over and deleted.
6533:
6534: =item *
6535:
6536: logperm() : append a permanent message to lonnet.perm.log, this log
6537: file never gets deleted by any automated portion of the system, only
6538: messages of critical importance should go in here.
6539:
6540: =back
6541:
6542: =head2 General File Helper Routines
6543:
6544: =over 4
6545:
6546: =item *
6547:
6548: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
6549: (a) files in /uploaded
6550: (i) If a local copy of the file exists -
6551: compares modification date of local copy with last-modified date for
6552: definitive version stored on home server for course. If local copy is
6553: stale, requests a new version from the home server and stores it.
6554: If the original has been removed from the home server, then local copy
6555: is unlinked.
6556: (ii) If local copy does not exist -
6557: requests the file from the home server and stores it.
6558:
6559: If $caller is 'uploadrep':
6560: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
6561: for request for files originally uploaded via DOCS.
6562: - returns 'ok' if fresh local copy now available, -1 otherwise.
6563:
6564: Otherwise:
6565: This indicates a call from the content generation phase of the request.
6566: - returns the entire contents of the file or -1.
6567:
6568: (b) files in /res
6569: - returns the entire contents of a file or -1;
6570: it properly subscribes to and replicates the file if neccessary.
6571:
6572: =item *
6573:
6574: filelocation($dir,$file) : returns file system location of a file
6575: based on URI; meant to be "fairly clean" absolute reference, $dir is a
6576: directory that relative $file lookups are to looked in ($dir of /a/dir
6577: and a file of ../bob will become /a/bob)
6578:
6579: =item *
6580:
6581: hreflocation($dir,$file) : returns file system location or a URL; same as
6582: filelocation except for hrefs
6583:
6584: =item *
6585:
6586: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
6587:
6588: =back
6589:
6590: =head2 Usererfile file routines (/uploaded*)
6591:
6592: =over 4
6593:
6594: =item *
6595:
6596: userfileupload(): main rotine for putting a file in a user or course's
6597: filespace, arguments are,
6598:
6599: formname - required - this is the name of the element in $env where the
6600: filename, and the contents of the file to create/modifed exist
6601: the filename is in $env{'form.'.$formname.'.filename'} and the
6602: contents of the file is located in $env{'form.'.$formname}
6603: coursedoc - if true, store the file in the course of the active role
6604: of the current user
6605: subdir - required - subdirectory to put the file in under ../userfiles/
6606: if undefined, it will be placed in "unknown"
6607:
6608: (This routine calls clean_filename() to remove any dangerous
6609: characters from the filename, and then calls finuserfileupload() to
6610: complete the transaction)
6611:
6612: returns either the url of the uploaded file (/uploaded/....) if successful
6613: and /adm/notfound.html if unsuccessful
6614:
6615: =item *
6616:
6617: clean_filename(): routine for cleaing a filename up for storage in
6618: userfile space, argument is:
6619:
6620: filename - proposed filename
6621:
6622: returns: the new clean filename
6623:
6624: =item *
6625:
6626: finishuserfileupload(): routine that creaes and sends the file to
6627: userspace, probably shouldn't be called directly
6628:
6629: docuname: username or courseid of destination for the file
6630: docudom: domain of user/course of destination for the file
6631: docuhome: loncapa id of the library server that is getting the file
6632: formname: same as for userfileupload()
6633: fname: filename (inculding subdirectories) for the file
6634:
6635: returns either the url of the uploaded file (/uploaded/....) if successful
6636: and /adm/notfound.html if unsuccessful
6637:
6638: =item *
6639:
6640: renameuserfile(): renames an existing userfile to a new name
6641:
6642: Args:
6643: docuname: username or courseid of destination for the file
6644: docudom: domain of user/course of destination for the file
6645: old: current file name (including any subdirs under userfiles)
6646: new: desired file name (including any subdirs under userfiles)
6647:
6648: =item *
6649:
6650: mkdiruserfile(): creates a directory is a userfiles dir
6651:
6652: Args:
6653: docuname: username or courseid of destination for the file
6654: docudom: domain of user/course of destination for the file
6655: dir: dir to create (including any subdirs under userfiles)
6656:
6657: =item *
6658:
6659: removeuserfile(): removes a file that exists in userfiles
6660:
6661: Args:
6662: docuname: username or courseid of destination for the file
6663: docudom: domain of user/course of destination for the file
6664: fname: filname to delete (including any subdirs under userfiles)
6665:
6666: =item *
6667:
6668: removeuploadedurl(): convience function for removeuserfile()
6669:
6670: Args:
6671: url: a full /uploaded/... url to delete
6672:
6673: =back
6674:
6675: =head2 HTTP Helper Routines
6676:
6677: =over 4
6678:
6679: =item *
6680:
6681: escape() : unpack non-word characters into CGI-compatible hex codes
6682:
6683: =item *
6684:
6685: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
6686:
6687: =back
6688:
6689: =head1 PRIVATE SUBROUTINES
6690:
6691: =head2 Underlying communication routines (Shouldn't call)
6692:
6693: =over 4
6694:
6695: =item *
6696:
6697: subreply() : tries to pass a message to lonc, returns con_lost if incapable
6698:
6699: =item *
6700:
6701: reply() : uses subreply to send a message to remote machine, logs all failures
6702:
6703: =item *
6704:
6705: critical() : passes a critical message to another server; if cannot
6706: get through then place message in connection buffer directory and
6707: returns con_delayed, if incapable of saving message, returns
6708: con_failed
6709:
6710: =item *
6711:
6712: reconlonc() : tries to reconnect lonc client processes.
6713:
6714: =back
6715:
6716: =head2 Resource Access Logging
6717:
6718: =over 4
6719:
6720: =item *
6721:
6722: flushcourselogs() : flush (save) buffer logs and access logs
6723:
6724: =item *
6725:
6726: courselog($what) : save message for course in hash
6727:
6728: =item *
6729:
6730: courseacclog($what) : save message for course using &courselog(). Perform
6731: special processing for specific resource types (problems, exams, quizzes, etc).
6732:
6733: =item *
6734:
6735: goodbye() : flush course logs and log shutting down; it is called in srm.conf
6736: as a PerlChildExitHandler
6737:
6738: =back
6739:
6740: =head2 Other
6741:
6742: =over 4
6743:
6744: =item *
6745:
6746: symblist($mapname,%newhash) : update symbolic storage links
6747:
6748: =back
6749:
6750: =cut
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