1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.755 2006/06/22 14:30:14 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %hostname %badServerCache %iphost %spareid %hostdom
39: %libserv %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf %coursetypebuf
42: %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati %domain_primary
44: $tmpdir $_64bit %env);
45:
46: use IO::Socket;
47: use GDBM_File;
48: use HTML::LCParser;
49: use HTML::Parser;
50: use Fcntl qw(:flock);
51: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
52: use Time::HiRes qw( gettimeofday tv_interval );
53: use Cache::Memcached;
54: use Digest::MD5;
55: use lib '/home/httpd/lib/perl';
56: use LONCAPA;
57: use LONCAPA::Configuration;
58:
59: my $readit;
60: my $max_connection_retries = 10; # Or some such value.
61:
62: require Exporter;
63:
64: our @ISA = qw (Exporter);
65: our @EXPORT = qw(%env);
66:
67: =pod
68:
69: =head1 Package Variables
70:
71: These are largely undocumented, so if you decipher one please note it here.
72:
73: =over 4
74:
75: =item $processmarker
76:
77: Contains the time this process was started and this servers host id.
78:
79: =item $dumpcount
80:
81: Counts the number of times a message log flush has been attempted (regardless
82: of success) by this process. Used as part of the filename when messages are
83: delayed.
84:
85: =back
86:
87: =cut
88:
89:
90: # --------------------------------------------------------------------- Logging
91: {
92: my $logid;
93: sub instructor_log {
94: my ($hash_name,$storehash,$delflag,$uname,$udom)=@_;
95: $logid++;
96: my $id=time().'00000'.$$.'00000'.$logid;
97: return &Apache::lonnet::put('nohist_'.$hash_name,
98: { $id => {
99: 'exe_uname' => $env{'user.name'},
100: 'exe_udom' => $env{'user.domain'},
101: 'exe_time' => time(),
102: 'exe_ip' => $ENV{'REMOTE_ADDR'},
103: 'delflag' => $delflag,
104: 'logentry' => $storehash,
105: 'uname' => $uname,
106: 'udom' => $udom,
107: }
108: },
109: $env{'course.'.$env{'request.course.id'}.'.domain'},
110: $env{'course.'.$env{'request.course.id'}.'.num'}
111: );
112: }
113: }
114:
115: sub logtouch {
116: my $execdir=$perlvar{'lonDaemons'};
117: unless (-e "$execdir/logs/lonnet.log") {
118: open(my $fh,">>$execdir/logs/lonnet.log");
119: close $fh;
120: }
121: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
122: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
123: }
124:
125: sub logthis {
126: my $message=shift;
127: my $execdir=$perlvar{'lonDaemons'};
128: my $now=time;
129: my $local=localtime($now);
130: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
131: print $fh "$local ($$): $message\n";
132: close($fh);
133: }
134: return 1;
135: }
136:
137: sub logperm {
138: my $message=shift;
139: my $execdir=$perlvar{'lonDaemons'};
140: my $now=time;
141: my $local=localtime($now);
142: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
143: print $fh "$now:$message:$local\n";
144: close($fh);
145: }
146: return 1;
147: }
148:
149: # -------------------------------------------------- Non-critical communication
150: sub subreply {
151: my ($cmd,$server)=@_;
152: my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
153: #
154: # With loncnew process trimming, there's a timing hole between lonc server
155: # process exit and the master server picking up the listen on the AF_UNIX
156: # socket. In that time interval, a lock file will exist:
157:
158: my $lockfile=$peerfile.".lock";
159: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
160: sleep(1);
161: }
162: # At this point, either a loncnew parent is listening or an old lonc
163: # or loncnew child is listening so we can connect or everything's dead.
164: #
165: # We'll give the connection a few tries before abandoning it. If
166: # connection is not possible, we'll con_lost back to the client.
167: #
168: my $client;
169: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
170: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
171: Type => SOCK_STREAM,
172: Timeout => 10);
173: if($client) {
174: last; # Connected!
175: }
176: sleep(1); # Try again later if failed connection.
177: }
178: my $answer;
179: if ($client) {
180: print $client "sethost:$server:$cmd\n";
181: $answer=<$client>;
182: if (!$answer) { $answer="con_lost"; }
183: chomp($answer);
184: } else {
185: $answer = 'con_lost'; # Failed connection.
186: }
187: return $answer;
188: }
189:
190: sub reply {
191: my ($cmd,$server)=@_;
192: unless (defined($hostname{$server})) { return 'no_such_host'; }
193: my $answer=subreply($cmd,$server);
194: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
195: &logthis("<font color=\"blue\">WARNING:".
196: " $cmd to $server returned $answer</font>");
197: }
198: return $answer;
199: }
200:
201: # ----------------------------------------------------------- Send USR1 to lonc
202:
203: sub reconlonc {
204: my $peerfile=shift;
205: &logthis("Trying to reconnect for $peerfile");
206: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
207: if (open(my $fh,"<$loncfile")) {
208: my $loncpid=<$fh>;
209: chomp($loncpid);
210: if (kill 0 => $loncpid) {
211: &logthis("lonc at pid $loncpid responding, sending USR1");
212: kill USR1 => $loncpid;
213: sleep 1;
214: if (-e "$peerfile") { return; }
215: &logthis("$peerfile still not there, give it another try");
216: sleep 5;
217: if (-e "$peerfile") { return; }
218: &logthis(
219: "<font color=\"blue\">WARNING: $peerfile still not there, giving up</font>");
220: } else {
221: &logthis(
222: "<font color=\"blue\">WARNING:".
223: " lonc at pid $loncpid not responding, giving up</font>");
224: }
225: } else {
226: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
227: }
228: }
229:
230: # ------------------------------------------------------ Critical communication
231:
232: sub critical {
233: my ($cmd,$server)=@_;
234: unless ($hostname{$server}) {
235: &logthis("<font color=\"blue\">WARNING:".
236: " Critical message to unknown server ($server)</font>");
237: return 'no_such_host';
238: }
239: my $answer=reply($cmd,$server);
240: if ($answer eq 'con_lost') {
241: &reconlonc("$perlvar{'lonSockDir'}/$server");
242: my $answer=reply($cmd,$server);
243: if ($answer eq 'con_lost') {
244: my $now=time;
245: my $middlename=$cmd;
246: $middlename=substr($middlename,0,16);
247: $middlename=~s/\W//g;
248: my $dfilename=
249: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
250: $dumpcount++;
251: {
252: my $dfh;
253: if (open($dfh,">$dfilename")) {
254: print $dfh "$cmd\n";
255: close($dfh);
256: }
257: }
258: sleep 2;
259: my $wcmd='';
260: {
261: my $dfh;
262: if (open($dfh,"<$dfilename")) {
263: $wcmd=<$dfh>;
264: close($dfh);
265: }
266: }
267: chomp($wcmd);
268: if ($wcmd eq $cmd) {
269: &logthis("<font color=\"blue\">WARNING: ".
270: "Connection buffer $dfilename: $cmd</font>");
271: &logperm("D:$server:$cmd");
272: return 'con_delayed';
273: } else {
274: &logthis("<font color=\"red\">CRITICAL:"
275: ." Critical connection failed: $server $cmd</font>");
276: &logperm("F:$server:$cmd");
277: return 'con_failed';
278: }
279: }
280: }
281: return $answer;
282: }
283:
284: # ------------------------------------------- check if return value is an error
285:
286: sub error {
287: my ($result) = @_;
288: if ($result =~ /^(con_lost|no_such_host|error: (\d+) )/) {
289: if ($2 == 2) { return undef; }
290: return $1;
291: }
292: &logthis("accepting $result");
293: return undef;
294: }
295:
296: # ------------------------------------------- Transfer profile into environment
297:
298: sub transfer_profile_to_env {
299: my ($lonidsdir,$handle)=@_;
300: if (!defined($lonidsdir)) {
301: $lonidsdir = $perlvar{'lonIDsDir'};
302: }
303: if (!defined($handle)) {
304: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
305: }
306:
307: my @profile;
308: {
309: open(my $idf,"$lonidsdir/$handle.id");
310: flock($idf,LOCK_SH);
311: @profile=<$idf>;
312: close($idf);
313: }
314: my $envi;
315: my %Remove;
316: for ($envi=0;$envi<=$#profile;$envi++) {
317: chomp($profile[$envi]);
318: my ($envname,$envvalue)=split(/=/,$profile[$envi],2);
319: $envname=&unescape($envname);
320: $envvalue=&unescape($envvalue);
321: $env{$envname} = $envvalue;
322: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
323: if ($time < time-300) {
324: $Remove{$key}++;
325: }
326: }
327: }
328: $env{'user.environment'} = "$lonidsdir/$handle.id";
329: foreach my $expired_key (keys(%Remove)) {
330: &delenv($expired_key);
331: }
332: }
333:
334: # ---------------------------------------------------------- Append Environment
335:
336: sub appenv {
337: my %newenv=@_;
338: foreach my $key (keys(%newenv)) {
339: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
340: &logthis("<font color=\"blue\">WARNING: ".
341: "Attempt to modify environment ".$key." to ".$newenv{$key}
342: .'</font>');
343: delete($newenv{$key});
344: } else {
345: $env{$key}=$newenv{$key};
346: }
347: }
348:
349: my $lockfh;
350: unless (open($lockfh,"$env{'user.environment'}")) {
351: return 'error: '.$!;
352: }
353: unless (flock($lockfh,LOCK_EX)) {
354: &logthis("<font color=\"blue\">WARNING: ".
355: 'Could not obtain exclusive lock in appenv: '.$!);
356: close($lockfh);
357: return 'error: '.$!;
358: }
359:
360: my @oldenv;
361: {
362: my $fh;
363: unless (open($fh,"$env{'user.environment'}")) {
364: return 'error: '.$!;
365: }
366: @oldenv=<$fh>;
367: close($fh);
368: }
369: for (my $i=0; $i<=$#oldenv; $i++) {
370: chomp($oldenv[$i]);
371: if ($oldenv[$i] ne '') {
372: my ($name,$value)=split(/=/,$oldenv[$i],2);
373: $name=&unescape($name);
374: $value=&unescape($value);
375: unless (defined($newenv{$name})) {
376: $newenv{$name}=$value;
377: }
378: }
379: }
380: {
381: my $fh;
382: unless (open($fh,">$env{'user.environment'}")) {
383: return 'error';
384: }
385: my $newname;
386: foreach $newname (keys %newenv) {
387: print $fh &escape($newname).'='.&escape($newenv{$newname})."\n";
388: }
389: close($fh);
390: }
391:
392: close($lockfh);
393: return 'ok';
394: }
395: # ----------------------------------------------------- Delete from Environment
396:
397: sub delenv {
398: my $delthis=shift;
399: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
400: &logthis("<font color=\"blue\">WARNING: ".
401: "Attempt to delete from environment ".$delthis);
402: return 'error';
403: }
404: my @oldenv;
405: {
406: my $fh;
407: unless (open($fh,"$env{'user.environment'}")) {
408: return 'error';
409: }
410: unless (flock($fh,LOCK_SH)) {
411: &logthis("<font color=\"blue\">WARNING: ".
412: 'Could not obtain shared lock in delenv: '.$!);
413: close($fh);
414: return 'error: '.$!;
415: }
416: @oldenv=<$fh>;
417: close($fh);
418: }
419: {
420: my $fh;
421: unless (open($fh,">$env{'user.environment'}")) {
422: return 'error';
423: }
424: unless (flock($fh,LOCK_EX)) {
425: &logthis("<font color=\"blue\">WARNING: ".
426: 'Could not obtain exclusive lock in delenv: '.$!);
427: close($fh);
428: return 'error: '.$!;
429: }
430: foreach my $cur_key (@oldenv) {
431: my $unescaped_cur_key = &unescape($cur_key);
432: if ($unescaped_cur_key=~/^$delthis/) {
433: my ($key) = split('=',$cur_key,2);
434: $key = &unescape($key);
435: delete($env{$key});
436: } else {
437: print $fh $cur_key;
438: }
439: }
440: close($fh);
441: }
442: return 'ok';
443: }
444:
445: # ------------------------------------------ Find out current server userload
446: # there is a copy in lond
447: sub userload {
448: my $numusers=0;
449: {
450: opendir(LONIDS,$perlvar{'lonIDsDir'});
451: my $filename;
452: my $curtime=time;
453: while ($filename=readdir(LONIDS)) {
454: if ($filename eq '.' || $filename eq '..') {next;}
455: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
456: if ($curtime-$mtime < 1800) { $numusers++; }
457: }
458: closedir(LONIDS);
459: }
460: my $userloadpercent=0;
461: my $maxuserload=$perlvar{'lonUserLoadLim'};
462: if ($maxuserload) {
463: $userloadpercent=100*$numusers/$maxuserload;
464: }
465: $userloadpercent=sprintf("%.2f",$userloadpercent);
466: return $userloadpercent;
467: }
468:
469: # ------------------------------------------ Fight off request when overloaded
470:
471: sub overloaderror {
472: my ($r,$checkserver)=@_;
473: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
474: my $loadavg;
475: if ($checkserver eq $perlvar{'lonHostID'}) {
476: open(my $loadfile,'/proc/loadavg');
477: $loadavg=<$loadfile>;
478: $loadavg =~ s/\s.*//g;
479: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
480: close($loadfile);
481: } else {
482: $loadavg=&reply('load',$checkserver);
483: }
484: my $overload=$loadavg-100;
485: if ($overload>0) {
486: $r->err_headers_out->{'Retry-After'}=$overload;
487: $r->log_error('Overload of '.$overload.' on '.$checkserver);
488: return 413;
489: }
490: return '';
491: }
492:
493: # ------------------------------ Find server with least workload from spare.tab
494:
495: sub spareserver {
496: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
497: my $tryserver;
498: my $spareserver='';
499: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
500: my $lowestserver=$loadpercent > $userloadpercent?
501: $loadpercent : $userloadpercent;
502: foreach $tryserver (keys(%spareid)) {
503: my $loadans=&reply('load',$tryserver);
504: my $userloadans=&reply('userload',$tryserver);
505: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
506: next; #didn't get a number from the server
507: }
508: my $answer;
509: if ($loadans =~ /\d/) {
510: if ($userloadans =~ /\d/) {
511: #both are numbers, pick the bigger one
512: $answer=$loadans > $userloadans?
513: $loadans : $userloadans;
514: } else {
515: $answer = $loadans;
516: }
517: } else {
518: $answer = $userloadans;
519: }
520: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
521: if ($want_server_name) {
522: $spareserver=$tryserver;
523: } else {
524: $spareserver="http://$hostname{$tryserver}";
525: }
526: $lowestserver=$answer;
527: }
528: }
529: return $spareserver;
530: }
531:
532: # --------------------------------------------- Try to change a user's password
533:
534: sub changepass {
535: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
536: $currentpass = &escape($currentpass);
537: $newpass = &escape($newpass);
538: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
539: $server);
540: if (! $answer) {
541: &logthis("No reply on password change request to $server ".
542: "by $uname in domain $udom.");
543: } elsif ($answer =~ "^ok") {
544: &logthis("$uname in $udom successfully changed their password ".
545: "on $server.");
546: } elsif ($answer =~ "^pwchange_failure") {
547: &logthis("$uname in $udom was unable to change their password ".
548: "on $server. The action was blocked by either lcpasswd ".
549: "or pwchange");
550: } elsif ($answer =~ "^non_authorized") {
551: &logthis("$uname in $udom did not get their password correct when ".
552: "attempting to change it on $server.");
553: } elsif ($answer =~ "^auth_mode_error") {
554: &logthis("$uname in $udom attempted to change their password despite ".
555: "not being locally or internally authenticated on $server.");
556: } elsif ($answer =~ "^unknown_user") {
557: &logthis("$uname in $udom attempted to change their password ".
558: "on $server but were unable to because $server is not ".
559: "their home server.");
560: } elsif ($answer =~ "^refused") {
561: &logthis("$server refused to change $uname in $udom password because ".
562: "it was sent an unencrypted request to change the password.");
563: }
564: return $answer;
565: }
566:
567: # ----------------------- Try to determine user's current authentication scheme
568:
569: sub queryauthenticate {
570: my ($uname,$udom)=@_;
571: my $uhome=&homeserver($uname,$udom);
572: if (!$uhome) {
573: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
574: return 'no_host';
575: }
576: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
577: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
578: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
579: }
580: return $answer;
581: }
582:
583: # --------- Try to authenticate user from domain's lib servers (first this one)
584:
585: sub authenticate {
586: my ($uname,$upass,$udom)=@_;
587: $upass=escape($upass);
588: $uname=~s/\W//g;
589: my $uhome=&homeserver($uname,$udom);
590: if (!$uhome) {
591: &logthis("User $uname at $udom is unknown in authenticate");
592: return 'no_host';
593: }
594: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
595: if ($answer eq 'authorized') {
596: &logthis("User $uname at $udom authorized by $uhome");
597: return $uhome;
598: }
599: if ($answer eq 'non_authorized') {
600: &logthis("User $uname at $udom rejected by $uhome");
601: return 'no_host';
602: }
603: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
604: return 'no_host';
605: }
606:
607: # ---------------------- Find the homebase for a user from domain's lib servers
608:
609: my %homecache;
610: sub homeserver {
611: my ($uname,$udom,$ignoreBadCache)=@_;
612: my $index="$uname:$udom";
613:
614: if (exists($homecache{$index})) { return $homecache{$index}; }
615: my $tryserver;
616: foreach $tryserver (keys %libserv) {
617: next if ($ignoreBadCache ne 'true' &&
618: exists($badServerCache{$tryserver}));
619: if ($hostdom{$tryserver} eq $udom) {
620: my $answer=reply("home:$udom:$uname",$tryserver);
621: if ($answer eq 'found') {
622: return $homecache{$index}=$tryserver;
623: } elsif ($answer eq 'no_host') {
624: $badServerCache{$tryserver}=1;
625: }
626: }
627: }
628: return 'no_host';
629: }
630:
631: # ------------------------------------- Find the usernames behind a list of IDs
632:
633: sub idget {
634: my ($udom,@ids)=@_;
635: my %returnhash=();
636:
637: my $tryserver;
638: foreach $tryserver (keys %libserv) {
639: if ($hostdom{$tryserver} eq $udom) {
640: my $idlist=join('&',@ids);
641: $idlist=~tr/A-Z/a-z/;
642: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
643: my @answer=();
644: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
645: @answer=split(/\&/,$reply);
646: } ;
647: my $i;
648: for ($i=0;$i<=$#ids;$i++) {
649: if ($answer[$i]) {
650: $returnhash{$ids[$i]}=$answer[$i];
651: }
652: }
653: }
654: }
655: return %returnhash;
656: }
657:
658: # ------------------------------------- Find the IDs behind a list of usernames
659:
660: sub idrget {
661: my ($udom,@unames)=@_;
662: my %returnhash=();
663: foreach (@unames) {
664: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
665: }
666: return %returnhash;
667: }
668:
669: # ------------------------------- Store away a list of names and associated IDs
670:
671: sub idput {
672: my ($udom,%ids)=@_;
673: my %servers=();
674: foreach (keys %ids) {
675: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
676: my $uhom=&homeserver($_,$udom);
677: if ($uhom ne 'no_host') {
678: my $id=&escape($ids{$_});
679: $id=~tr/A-Z/a-z/;
680: my $unam=&escape($_);
681: if ($servers{$uhom}) {
682: $servers{$uhom}.='&'.$id.'='.$unam;
683: } else {
684: $servers{$uhom}=$id.'='.$unam;
685: }
686: }
687: }
688: foreach (keys %servers) {
689: &critical('idput:'.$udom.':'.$servers{$_},$_);
690: }
691: }
692:
693: # --------------------------------------------------- Assign a key to a student
694:
695: sub assign_access_key {
696: #
697: # a valid key looks like uname:udom#comments
698: # comments are being appended
699: #
700: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
701: $kdom=
702: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
703: $knum=
704: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
705: $cdom=
706: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
707: $cnum=
708: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
709: $udom=$env{'user.name'} unless (defined($udom));
710: $uname=$env{'user.domain'} unless (defined($uname));
711: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
712: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
713: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
714: # assigned to this person
715: # - this should not happen,
716: # unless something went wrong
717: # the first time around
718: # ready to assign
719: $logentry=$1.'; '.$logentry;
720: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
721: $kdom,$knum) eq 'ok') {
722: # key now belongs to user
723: my $envkey='key.'.$cdom.'_'.$cnum;
724: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
725: &appenv('environment.'.$envkey => $ckey);
726: return 'ok';
727: } else {
728: return
729: 'error: Count not permanently assign key, will need to be re-entered later.';
730: }
731: } else {
732: return 'error: Could not assign key, try again later.';
733: }
734: } elsif (!$existing{$ckey}) {
735: # the key does not exist
736: return 'error: The key does not exist';
737: } else {
738: # the key is somebody else's
739: return 'error: The key is already in use';
740: }
741: }
742:
743: # ------------------------------------------ put an additional comment on a key
744:
745: sub comment_access_key {
746: #
747: # a valid key looks like uname:udom#comments
748: # comments are being appended
749: #
750: my ($ckey,$cdom,$cnum,$logentry)=@_;
751: $cdom=
752: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
753: $cnum=
754: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
755: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
756: if ($existing{$ckey}) {
757: $existing{$ckey}.='; '.$logentry;
758: # ready to assign
759: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
760: $cdom,$cnum) eq 'ok') {
761: return 'ok';
762: } else {
763: return 'error: Count not store comment.';
764: }
765: } else {
766: # the key does not exist
767: return 'error: The key does not exist';
768: }
769: }
770:
771: # ------------------------------------------------------ Generate a set of keys
772:
773: sub generate_access_keys {
774: my ($number,$cdom,$cnum,$logentry)=@_;
775: $cdom=
776: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
777: $cnum=
778: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
779: unless (&allowed('mky',$cdom)) { return 0; }
780: unless (($cdom) && ($cnum)) { return 0; }
781: if ($number>10000) { return 0; }
782: sleep(2); # make sure don't get same seed twice
783: srand(time()^($$+($$<<15))); # from "Programming Perl"
784: my $total=0;
785: for (my $i=1;$i<=$number;$i++) {
786: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
787: sprintf("%lx",int(100000*rand)).'-'.
788: sprintf("%lx",int(100000*rand));
789: $newkey=~s/1/g/g; # folks mix up 1 and l
790: $newkey=~s/0/h/g; # and also 0 and O
791: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
792: if ($existing{$newkey}) {
793: $i--;
794: } else {
795: if (&put('accesskeys',
796: { $newkey => '# generated '.localtime().
797: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
798: '; '.$logentry },
799: $cdom,$cnum) eq 'ok') {
800: $total++;
801: }
802: }
803: }
804: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
805: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
806: return $total;
807: }
808:
809: # ------------------------------------------------------- Validate an accesskey
810:
811: sub validate_access_key {
812: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
813: $cdom=
814: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
815: $cnum=
816: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
817: $udom=$env{'user.domain'} unless (defined($udom));
818: $uname=$env{'user.name'} unless (defined($uname));
819: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
820: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
821: }
822:
823: # ------------------------------------- Find the section of student in a course
824: sub devalidate_getsection_cache {
825: my ($udom,$unam,$courseid)=@_;
826: $courseid=~s/\_/\//g;
827: $courseid=~s/^(\w)/\/$1/;
828: my $hashid="$udom:$unam:$courseid";
829: &devalidate_cache_new('getsection',$hashid);
830: }
831:
832: sub getsection {
833: my ($udom,$unam,$courseid)=@_;
834: my $cachetime=1800;
835: $courseid=~s/\_/\//g;
836: $courseid=~s/^(\w)/\/$1/;
837:
838: my $hashid="$udom:$unam:$courseid";
839: my ($result,$cached)=&is_cached_new('getsection',$hashid);
840: if (defined($cached)) { return $result; }
841:
842: my %Pending;
843: my %Expired;
844: #
845: # Each role can either have not started yet (pending), be active,
846: # or have expired.
847: #
848: # If there is an active role, we are done.
849: #
850: # If there is more than one role which has not started yet,
851: # choose the one which will start sooner
852: # If there is one role which has not started yet, return it.
853: #
854: # If there is more than one expired role, choose the one which ended last.
855: # If there is a role which has expired, return it.
856: #
857: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
858: &homeserver($unam,$udom)))) {
859: my ($key,$value)=split(/\=/,$_);
860: $key=&unescape($key);
861: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
862: my $section=$1;
863: if ($key eq $courseid.'_st') { $section=''; }
864: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
865: my $now=time;
866: if (defined($end) && $end && ($now > $end)) {
867: $Expired{$end}=$section;
868: next;
869: }
870: if (defined($start) && $start && ($now < $start)) {
871: $Pending{$start}=$section;
872: next;
873: }
874: return &do_cache_new('getsection',$hashid,$section,$cachetime);
875: }
876: #
877: # Presumedly there will be few matching roles from the above
878: # loop and the sorting time will be negligible.
879: if (scalar(keys(%Pending))) {
880: my ($time) = sort {$a <=> $b} keys(%Pending);
881: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
882: }
883: if (scalar(keys(%Expired))) {
884: my @sorted = sort {$a <=> $b} keys(%Expired);
885: my $time = pop(@sorted);
886: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
887: }
888: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
889: }
890:
891: sub save_cache {
892: &purge_remembered();
893: #&Apache::loncommon::validate_page();
894: undef(%env);
895: }
896:
897: my $to_remember=-1;
898: my %remembered;
899: my %accessed;
900: my $kicks=0;
901: my $hits=0;
902: sub devalidate_cache_new {
903: my ($name,$id,$debug) = @_;
904: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
905: $id=&escape($name.':'.$id);
906: $memcache->delete($id);
907: delete($remembered{$id});
908: delete($accessed{$id});
909: }
910:
911: sub is_cached_new {
912: my ($name,$id,$debug) = @_;
913: $id=&escape($name.':'.$id);
914: if (exists($remembered{$id})) {
915: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
916: $accessed{$id}=[&gettimeofday()];
917: $hits++;
918: return ($remembered{$id},1);
919: }
920: my $value = $memcache->get($id);
921: if (!(defined($value))) {
922: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
923: return (undef,undef);
924: }
925: if ($value eq '__undef__') {
926: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
927: $value=undef;
928: }
929: &make_room($id,$value,$debug);
930: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
931: return ($value,1);
932: }
933:
934: sub do_cache_new {
935: my ($name,$id,$value,$time,$debug) = @_;
936: $id=&escape($name.':'.$id);
937: my $setvalue=$value;
938: if (!defined($setvalue)) {
939: $setvalue='__undef__';
940: }
941: if (!defined($time) ) {
942: $time=600;
943: }
944: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
945: $memcache->set($id,$setvalue,$time);
946: # need to make a copy of $value
947: #&make_room($id,$value,$debug);
948: return $value;
949: }
950:
951: sub make_room {
952: my ($id,$value,$debug)=@_;
953: $remembered{$id}=$value;
954: if ($to_remember<0) { return; }
955: $accessed{$id}=[&gettimeofday()];
956: if (scalar(keys(%remembered)) <= $to_remember) { return; }
957: my $to_kick;
958: my $max_time=0;
959: foreach my $other (keys(%accessed)) {
960: if (&tv_interval($accessed{$other}) > $max_time) {
961: $to_kick=$other;
962: $max_time=&tv_interval($accessed{$other});
963: }
964: }
965: delete($remembered{$to_kick});
966: delete($accessed{$to_kick});
967: $kicks++;
968: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
969: return;
970: }
971:
972: sub purge_remembered {
973: #&logthis("Tossing ".scalar(keys(%remembered)));
974: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
975: undef(%remembered);
976: undef(%accessed);
977: }
978: # ------------------------------------- Read an entry from a user's environment
979:
980: sub userenvironment {
981: my ($udom,$unam,@what)=@_;
982: my %returnhash=();
983: my @answer=split(/\&/,
984: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
985: &homeserver($unam,$udom)));
986: my $i;
987: for ($i=0;$i<=$#what;$i++) {
988: $returnhash{$what[$i]}=&unescape($answer[$i]);
989: }
990: return %returnhash;
991: }
992:
993: # ---------------------------------------------------------- Get a studentphoto
994: sub studentphoto {
995: my ($udom,$unam,$ext) = @_;
996: my $home=&Apache::lonnet::homeserver($unam,$udom);
997: if (defined($env{'request.course.id'})) {
998: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
999: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
1000: return(&retrievestudentphoto($udom,$unam,$ext));
1001: } else {
1002: my ($result,$perm_reqd)=
1003: &Apache::lonnet::auto_photo_permission($unam,$udom);
1004: if ($result eq 'ok') {
1005: if (!($perm_reqd eq 'yes')) {
1006: return(&retrievestudentphoto($udom,$unam,$ext));
1007: }
1008: }
1009: }
1010: }
1011: } else {
1012: my ($result,$perm_reqd) =
1013: &Apache::lonnet::auto_photo_permission($unam,$udom);
1014: if ($result eq 'ok') {
1015: if (!($perm_reqd eq 'yes')) {
1016: return(&retrievestudentphoto($udom,$unam,$ext));
1017: }
1018: }
1019: }
1020: return '/adm/lonKaputt/lonlogo_broken.gif';
1021: }
1022:
1023: sub retrievestudentphoto {
1024: my ($udom,$unam,$ext,$type) = @_;
1025: my $home=&Apache::lonnet::homeserver($unam,$udom);
1026: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1027: if ($ret eq 'ok') {
1028: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1029: if ($type eq 'thumbnail') {
1030: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1031: }
1032: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1033: return $tokenurl;
1034: } else {
1035: if ($type eq 'thumbnail') {
1036: return '/adm/lonKaputt/genericstudent_tn.gif';
1037: } else {
1038: return '/adm/lonKaputt/lonlogo_broken.gif';
1039: }
1040: }
1041: }
1042:
1043: # -------------------------------------------------------------------- New chat
1044:
1045: sub chatsend {
1046: my ($newentry,$anon,$group)=@_;
1047: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1048: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1049: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1050: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1051: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1052: &escape($newentry)).':'.$group,$chome);
1053: }
1054:
1055: # ------------------------------------------ Find current version of a resource
1056:
1057: sub getversion {
1058: my $fname=&clutter(shift);
1059: unless ($fname=~/^\/res\//) { return -1; }
1060: return ¤tversion(&filelocation('',$fname));
1061: }
1062:
1063: sub currentversion {
1064: my $fname=shift;
1065: my ($result,$cached)=&is_cached_new('resversion',$fname);
1066: if (defined($cached)) { return $result; }
1067: my $author=$fname;
1068: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1069: my ($udom,$uname)=split(/\//,$author);
1070: my $home=homeserver($uname,$udom);
1071: if ($home eq 'no_host') {
1072: return -1;
1073: }
1074: my $answer=reply("currentversion:$fname",$home);
1075: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1076: return -1;
1077: }
1078: return &do_cache_new('resversion',$fname,$answer,600);
1079: }
1080:
1081: # ----------------------------- Subscribe to a resource, return URL if possible
1082:
1083: sub subscribe {
1084: my $fname=shift;
1085: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1086: $fname=~s/[\n\r]//g;
1087: my $author=$fname;
1088: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1089: my ($udom,$uname)=split(/\//,$author);
1090: my $home=homeserver($uname,$udom);
1091: if ($home eq 'no_host') {
1092: return 'not_found';
1093: }
1094: my $answer=reply("sub:$fname",$home);
1095: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1096: $answer.=' by '.$home;
1097: }
1098: return $answer;
1099: }
1100:
1101: # -------------------------------------------------------------- Replicate file
1102:
1103: sub repcopy {
1104: my $filename=shift;
1105: $filename=~s/\/+/\//g;
1106: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1107: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1108: if ($filename=~m|^/home/httpd/html/userfiles/| or
1109: $filename=~m -^/*(uploaded|editupload)/-) {
1110: return &repcopy_userfile($filename);
1111: }
1112: $filename=~s/[\n\r]//g;
1113: my $transname="$filename.in.transfer";
1114: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1115: my $remoteurl=subscribe($filename);
1116: if ($remoteurl =~ /^con_lost by/) {
1117: &logthis("Subscribe returned $remoteurl: $filename");
1118: return 'unavailable';
1119: } elsif ($remoteurl eq 'not_found') {
1120: #&logthis("Subscribe returned not_found: $filename");
1121: return 'not_found';
1122: } elsif ($remoteurl =~ /^rejected by/) {
1123: &logthis("Subscribe returned $remoteurl: $filename");
1124: return 'forbidden';
1125: } elsif ($remoteurl eq 'directory') {
1126: return 'ok';
1127: } else {
1128: my $author=$filename;
1129: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1130: my ($udom,$uname)=split(/\//,$author);
1131: my $home=homeserver($uname,$udom);
1132: unless ($home eq $perlvar{'lonHostID'}) {
1133: my @parts=split(/\//,$filename);
1134: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1135: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1136: &logthis("Malconfiguration for replication: $filename");
1137: return 'bad_request';
1138: }
1139: my $count;
1140: for ($count=5;$count<$#parts;$count++) {
1141: $path.="/$parts[$count]";
1142: if ((-e $path)!=1) {
1143: mkdir($path,0777);
1144: }
1145: }
1146: my $ua=new LWP::UserAgent;
1147: my $request=new HTTP::Request('GET',"$remoteurl");
1148: my $response=$ua->request($request,$transname);
1149: if ($response->is_error()) {
1150: unlink($transname);
1151: my $message=$response->status_line;
1152: &logthis("<font color=\"blue\">WARNING:"
1153: ." LWP get: $message: $filename</font>");
1154: return 'unavailable';
1155: } else {
1156: if ($remoteurl!~/\.meta$/) {
1157: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1158: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1159: if ($mresponse->is_error()) {
1160: unlink($filename.'.meta');
1161: &logthis(
1162: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1163: }
1164: }
1165: rename($transname,$filename);
1166: return 'ok';
1167: }
1168: }
1169: }
1170: }
1171:
1172: # ------------------------------------------------ Get server side include body
1173: sub ssi_body {
1174: my ($filelink,%form)=@_;
1175: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1176: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1177: }
1178: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1179: &ssi($filelink,%form));
1180: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1181: $output=~s/^.*?\<body[^\>]*\>//si;
1182: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1183: return $output;
1184: }
1185:
1186: # --------------------------------------------------------- Server Side Include
1187:
1188: sub ssi {
1189:
1190: my ($fn,%form)=@_;
1191:
1192: my $ua=new LWP::UserAgent;
1193:
1194: my $request;
1195:
1196: $form{'no_update_last_known'}=1;
1197:
1198: if (%form) {
1199: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1200: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1201: } else {
1202: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1203: }
1204:
1205: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1206: my $response=$ua->request($request);
1207:
1208: return $response->content;
1209: }
1210:
1211: sub externalssi {
1212: my ($url)=@_;
1213: my $ua=new LWP::UserAgent;
1214: my $request=new HTTP::Request('GET',$url);
1215: my $response=$ua->request($request);
1216: return $response->content;
1217: }
1218:
1219: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1220:
1221: sub allowuploaded {
1222: my ($srcurl,$url)=@_;
1223: $url=&clutter(&declutter($url));
1224: my $dir=$url;
1225: $dir=~s/\/[^\/]+$//;
1226: my %httpref=();
1227: my $httpurl=&hreflocation('',$url);
1228: $httpref{'httpref.'.$httpurl}=$srcurl;
1229: &Apache::lonnet::appenv(%httpref);
1230: }
1231:
1232: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1233: # input: action, courseID, current domain, intended
1234: # path to file, source of file, instruction to parse file for objects,
1235: # ref to hash for embedded objects,
1236: # ref to hash for codebase of java objects.
1237: #
1238: # output: url to file (if action was uploaddoc),
1239: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1240: #
1241: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1242: # course.
1243: #
1244: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1245: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1246: # course's home server.
1247: #
1248: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1249: # be copied from $source (current location) to
1250: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1251: # and will then be copied to
1252: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1253: # course's home server.
1254: #
1255: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1256: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1257: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1258: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1259: # in course's home server.
1260: #
1261:
1262: sub process_coursefile {
1263: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1264: my $fetchresult;
1265: my $home=&homeserver($docuname,$docudom);
1266: if ($action eq 'propagate') {
1267: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1268: $home);
1269: } else {
1270: my $fpath = '';
1271: my $fname = $file;
1272: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1273: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1274: my $filepath = &build_filepath($fpath);
1275: if ($action eq 'copy') {
1276: if ($source eq '') {
1277: $fetchresult = 'no source file';
1278: return $fetchresult;
1279: } else {
1280: my $destination = $filepath.'/'.$fname;
1281: rename($source,$destination);
1282: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1283: $home);
1284: }
1285: } elsif ($action eq 'uploaddoc') {
1286: open(my $fh,'>'.$filepath.'/'.$fname);
1287: print $fh $env{'form.'.$source};
1288: close($fh);
1289: if ($parser eq 'parse') {
1290: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1291: unless ($parse_result eq 'ok') {
1292: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1293: }
1294: }
1295: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1296: $home);
1297: if ($fetchresult eq 'ok') {
1298: return '/uploaded/'.$fpath.'/'.$fname;
1299: } else {
1300: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1301: ' to host '.$home.': '.$fetchresult);
1302: return '/adm/notfound.html';
1303: }
1304: }
1305: }
1306: unless ( $fetchresult eq 'ok') {
1307: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1308: ' to host '.$home.': '.$fetchresult);
1309: }
1310: return $fetchresult;
1311: }
1312:
1313: sub build_filepath {
1314: my ($fpath) = @_;
1315: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1316: unless ($fpath eq '') {
1317: my @parts=split('/',$fpath);
1318: foreach my $part (@parts) {
1319: $filepath.= '/'.$part;
1320: if ((-e $filepath)!=1) {
1321: mkdir($filepath,0777);
1322: }
1323: }
1324: }
1325: return $filepath;
1326: }
1327:
1328: sub store_edited_file {
1329: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1330: my $file = $primary_url;
1331: $file =~ s#^/uploaded/$docudom/$docuname/##;
1332: my $fpath = '';
1333: my $fname = $file;
1334: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1335: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1336: my $filepath = &build_filepath($fpath);
1337: open(my $fh,'>'.$filepath.'/'.$fname);
1338: print $fh $content;
1339: close($fh);
1340: my $home=&homeserver($docuname,$docudom);
1341: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1342: $home);
1343: if ($$fetchresult eq 'ok') {
1344: return '/uploaded/'.$fpath.'/'.$fname;
1345: } else {
1346: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1347: ' to host '.$home.': '.$$fetchresult);
1348: return '/adm/notfound.html';
1349: }
1350: }
1351:
1352: sub clean_filename {
1353: my ($fname)=@_;
1354: # Replace Windows backslashes by forward slashes
1355: $fname=~s/\\/\//g;
1356: # Get rid of everything but the actual filename
1357: $fname=~s/^.*\/([^\/]+)$/$1/;
1358: # Replace spaces by underscores
1359: $fname=~s/\s+/\_/g;
1360: # Replace all other weird characters by nothing
1361: $fname=~s/[^\w\.\-]//g;
1362: # Replace all .\d. sequences with _\d. so they no longer look like version
1363: # numbers
1364: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1365: return $fname;
1366: }
1367:
1368: # --------------- Take an uploaded file and put it into the userfiles directory
1369: # input: $formname - the contents of the file are in $env{"form.$formname"}
1370: # the desired filenam is in $env{"form.$formname.filename"}
1371: # $coursedoc - if true up to the current course
1372: # if false
1373: # $subdir - directory in userfile to store the file into
1374: # $parser, $allfiles, $codebase - unknown
1375: #
1376: # output: url of file in userspace, or error: <message>
1377: # or /adm/notfound.html if failure to upload occurse
1378:
1379:
1380: sub userfileupload {
1381: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
1382: if (!defined($subdir)) { $subdir='unknown'; }
1383: my $fname=$env{'form.'.$formname.'.filename'};
1384: $fname=&clean_filename($fname);
1385: # See if there is anything left
1386: unless ($fname) { return 'error: no uploaded file'; }
1387: chop($env{'form.'.$formname});
1388: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1389: my $now = time;
1390: my $filepath = 'tmp/helprequests/'.$now;
1391: my @parts=split(/\//,$filepath);
1392: my $fullpath = $perlvar{'lonDaemons'};
1393: for (my $i=0;$i<@parts;$i++) {
1394: $fullpath .= '/'.$parts[$i];
1395: if ((-e $fullpath)!=1) {
1396: mkdir($fullpath,0777);
1397: }
1398: }
1399: open(my $fh,'>'.$fullpath.'/'.$fname);
1400: print $fh $env{'form.'.$formname};
1401: close($fh);
1402: return $fullpath.'/'.$fname;
1403: } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
1404: my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
1405: '_'.$env{'user.domain'}.'/pending';
1406: my @parts=split(/\//,$filepath);
1407: my $fullpath = $perlvar{'lonDaemons'};
1408: for (my $i=0;$i<@parts;$i++) {
1409: $fullpath .= '/'.$parts[$i];
1410: if ((-e $fullpath)!=1) {
1411: mkdir($fullpath,0777);
1412: }
1413: }
1414: open(my $fh,'>'.$fullpath.'/'.$fname);
1415: print $fh $env{'form.'.$formname};
1416: close($fh);
1417: return $fullpath.'/'.$fname;
1418: }
1419:
1420: # Create the directory if not present
1421: $fname="$subdir/$fname";
1422: if ($coursedoc) {
1423: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1424: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1425: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1426: return &finishuserfileupload($docuname,$docudom,
1427: $formname,$fname,$parser,$allfiles,
1428: $codebase);
1429: } else {
1430: $fname=$env{'form.folder'}.'/'.$fname;
1431: return &process_coursefile('uploaddoc',$docuname,$docudom,
1432: $fname,$formname,$parser,
1433: $allfiles,$codebase);
1434: }
1435: } elsif (defined($destuname)) {
1436: my $docuname=$destuname;
1437: my $docudom=$destudom;
1438: return &finishuserfileupload($docuname,$docudom,$formname,
1439: $fname,$parser,$allfiles,$codebase);
1440:
1441: } else {
1442: my $docuname=$env{'user.name'};
1443: my $docudom=$env{'user.domain'};
1444: if (exists($env{'form.group'})) {
1445: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1446: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1447: }
1448: return &finishuserfileupload($docuname,$docudom,$formname,
1449: $fname,$parser,$allfiles,$codebase);
1450: }
1451: }
1452:
1453: sub finishuserfileupload {
1454: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1455: my $path=$docudom.'/'.$docuname.'/';
1456: my $filepath=$perlvar{'lonDocRoot'};
1457: my ($fnamepath,$file);
1458: $file=$fname;
1459: if ($fname=~m|/|) {
1460: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1461: $path.=$fnamepath.'/';
1462: }
1463: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1464: my $count;
1465: for ($count=4;$count<=$#parts;$count++) {
1466: $filepath.="/$parts[$count]";
1467: if ((-e $filepath)!=1) {
1468: mkdir($filepath,0777);
1469: }
1470: }
1471: # Save the file
1472: {
1473: if (!open(FH,'>'.$filepath.'/'.$file)) {
1474: &logthis('Failed to create '.$filepath.'/'.$file);
1475: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1476: return '/adm/notfound.html';
1477: }
1478: if (!print FH ($env{'form.'.$formname})) {
1479: &logthis('Failed to write to '.$filepath.'/'.$file);
1480: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1481: return '/adm/notfound.html';
1482: }
1483: close(FH);
1484: }
1485: if ($parser eq 'parse') {
1486: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1487: $codebase);
1488: unless ($parse_result eq 'ok') {
1489: &logthis('Failed to parse '.$filepath.$file.
1490: ' for embedded media: '.$parse_result);
1491: }
1492: }
1493: # Notify homeserver to grep it
1494: #
1495: my $docuhome=&homeserver($docuname,$docudom);
1496: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1497: if ($fetchresult eq 'ok') {
1498: #
1499: # Return the URL to it
1500: return '/uploaded/'.$path.$file;
1501: } else {
1502: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1503: ': '.$fetchresult);
1504: return '/adm/notfound.html';
1505: }
1506: }
1507:
1508: sub extract_embedded_items {
1509: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1510: my @state = ();
1511: my %javafiles = (
1512: codebase => '',
1513: code => '',
1514: archive => ''
1515: );
1516: my %mediafiles = (
1517: src => '',
1518: movie => '',
1519: );
1520: my $p;
1521: if ($content) {
1522: $p = HTML::LCParser->new($content);
1523: } else {
1524: $p = HTML::LCParser->new($filepath.'/'.$file);
1525: }
1526: while (my $t=$p->get_token()) {
1527: if ($t->[0] eq 'S') {
1528: my ($tagname, $attr) = ($t->[1],$t->[2]);
1529: push (@state, $tagname);
1530: if (lc($tagname) eq 'allow') {
1531: &add_filetype($allfiles,$attr->{'src'},'src');
1532: }
1533: if (lc($tagname) eq 'img') {
1534: &add_filetype($allfiles,$attr->{'src'},'src');
1535: }
1536: if (lc($tagname) eq 'script') {
1537: if ($attr->{'archive'} =~ /\.jar$/i) {
1538: &add_filetype($allfiles,$attr->{'archive'},'archive');
1539: } else {
1540: &add_filetype($allfiles,$attr->{'src'},'src');
1541: }
1542: }
1543: if (lc($tagname) eq 'link') {
1544: if (lc($attr->{'rel'}) eq 'stylesheet') {
1545: &add_filetype($allfiles,$attr->{'href'},'href');
1546: }
1547: }
1548: if (lc($tagname) eq 'object' ||
1549: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1550: foreach my $item (keys(%javafiles)) {
1551: $javafiles{$item} = '';
1552: }
1553: }
1554: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1555: my $name = lc($attr->{'name'});
1556: foreach my $item (keys(%javafiles)) {
1557: if ($name eq $item) {
1558: $javafiles{$item} = $attr->{'value'};
1559: last;
1560: }
1561: }
1562: foreach my $item (keys(%mediafiles)) {
1563: if ($name eq $item) {
1564: &add_filetype($allfiles, $attr->{'value'}, 'value');
1565: last;
1566: }
1567: }
1568: }
1569: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1570: foreach my $item (keys(%javafiles)) {
1571: if ($attr->{$item}) {
1572: $javafiles{$item} = $attr->{$item};
1573: last;
1574: }
1575: }
1576: foreach my $item (keys(%mediafiles)) {
1577: if ($attr->{$item}) {
1578: &add_filetype($allfiles,$attr->{$item},$item);
1579: last;
1580: }
1581: }
1582: }
1583: } elsif ($t->[0] eq 'E') {
1584: my ($tagname) = ($t->[1]);
1585: if ($javafiles{'codebase'} ne '') {
1586: $javafiles{'codebase'} .= '/';
1587: }
1588: if (lc($tagname) eq 'applet' ||
1589: lc($tagname) eq 'object' ||
1590: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1591: ) {
1592: foreach my $item (keys(%javafiles)) {
1593: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1594: my $file=$javafiles{'codebase'}.$javafiles{$item};
1595: &add_filetype($allfiles,$file,$item);
1596: }
1597: }
1598: }
1599: pop @state;
1600: }
1601: }
1602: return 'ok';
1603: }
1604:
1605: sub add_filetype {
1606: my ($allfiles,$file,$type)=@_;
1607: if (exists($allfiles->{$file})) {
1608: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1609: push(@{$allfiles->{$file}}, &escape($type));
1610: }
1611: } else {
1612: @{$allfiles->{$file}} = (&escape($type));
1613: }
1614: }
1615:
1616: sub removeuploadedurl {
1617: my ($url)=@_;
1618: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1619: return &removeuserfile($uname,$udom,$fname);
1620: }
1621:
1622: sub removeuserfile {
1623: my ($docuname,$docudom,$fname)=@_;
1624: my $home=&homeserver($docuname,$docudom);
1625: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1626: }
1627:
1628: sub mkdiruserfile {
1629: my ($docuname,$docudom,$dir)=@_;
1630: my $home=&homeserver($docuname,$docudom);
1631: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1632: }
1633:
1634: sub renameuserfile {
1635: my ($docuname,$docudom,$old,$new)=@_;
1636: my $home=&homeserver($docuname,$docudom);
1637: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1638: &escape("$new"),$home);
1639: }
1640:
1641: # ------------------------------------------------------------------------- Log
1642:
1643: sub log {
1644: my ($dom,$nam,$hom,$what)=@_;
1645: return critical("log:$dom:$nam:$what",$hom);
1646: }
1647:
1648: # ------------------------------------------------------------------ Course Log
1649: #
1650: # This routine flushes several buffers of non-mission-critical nature
1651: #
1652:
1653: sub flushcourselogs {
1654: &logthis('Flushing log buffers');
1655: #
1656: # course logs
1657: # This is a log of all transactions in a course, which can be used
1658: # for data mining purposes
1659: #
1660: # It also collects the courseid database, which lists last transaction
1661: # times and course titles for all courseids
1662: #
1663: my %courseidbuffer=();
1664: foreach (keys %courselogs) {
1665: my $crsid=$_;
1666: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1667: &escape($courselogs{$crsid}),
1668: $coursehombuf{$crsid}) eq 'ok') {
1669: delete $courselogs{$crsid};
1670: } else {
1671: &logthis('Failed to flush log buffer for '.$crsid);
1672: if (length($courselogs{$crsid})>40000) {
1673: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1674: " exceeded maximum size, deleting.</font>");
1675: delete $courselogs{$crsid};
1676: }
1677: }
1678: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1679: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1680: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1681: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1682: } else {
1683: $courseidbuffer{$coursehombuf{$crsid}}=
1684: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1685: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1686: }
1687: }
1688: #
1689: # Write course id database (reverse lookup) to homeserver of courses
1690: # Is used in pickcourse
1691: #
1692: foreach (keys %courseidbuffer) {
1693: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1694: }
1695: #
1696: # File accesses
1697: # Writes to the dynamic metadata of resources to get hit counts, etc.
1698: #
1699: foreach my $entry (keys(%accesshash)) {
1700: if ($entry =~ /___count$/) {
1701: my ($dom,$name);
1702: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1703: if (! defined($dom) || $dom eq '' ||
1704: ! defined($name) || $name eq '') {
1705: my $cid = $env{'request.course.id'};
1706: $dom = $env{'request.'.$cid.'.domain'};
1707: $name = $env{'request.'.$cid.'.num'};
1708: }
1709: my $value = $accesshash{$entry};
1710: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1711: my %temphash=($url => $value);
1712: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1713: if ($result eq 'ok') {
1714: delete $accesshash{$entry};
1715: } elsif ($result eq 'unknown_cmd') {
1716: # Target server has old code running on it.
1717: my %temphash=($entry => $value);
1718: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1719: delete $accesshash{$entry};
1720: }
1721: }
1722: } else {
1723: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1724: my %temphash=($entry => $accesshash{$entry});
1725: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1726: delete $accesshash{$entry};
1727: }
1728: }
1729: }
1730: #
1731: # Roles
1732: # Reverse lookup of user roles for course faculty/staff and co-authorship
1733: #
1734: foreach (keys %userrolehash) {
1735: my $entry=$_;
1736: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1737: split(/\:/,$entry);
1738: if (&Apache::lonnet::put('nohist_userroles',
1739: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1740: $rudom,$runame) eq 'ok') {
1741: delete $userrolehash{$entry};
1742: }
1743: }
1744: #
1745: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1746: #
1747: my %domrolebuffer = ();
1748: foreach my $entry (keys %domainrolehash) {
1749: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1750: if ($domrolebuffer{$rudom}) {
1751: $domrolebuffer{$rudom}.='&'.&escape($entry).
1752: '='.&escape($domainrolehash{$entry});
1753: } else {
1754: $domrolebuffer{$rudom}.=&escape($entry).
1755: '='.&escape($domainrolehash{$entry});
1756: }
1757: delete $domainrolehash{$entry};
1758: }
1759: foreach my $dom (keys(%domrolebuffer)) {
1760: foreach my $tryserver (keys %libserv) {
1761: if ($hostdom{$tryserver} eq $dom) {
1762: unless (&reply('domroleput:'.$dom.':'.
1763: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1764: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1765: }
1766: }
1767: }
1768: }
1769: $dumpcount++;
1770: }
1771:
1772: sub courselog {
1773: my $what=shift;
1774: $what=time.':'.$what;
1775: unless ($env{'request.course.id'}) { return ''; }
1776: $coursedombuf{$env{'request.course.id'}}=
1777: $env{'course.'.$env{'request.course.id'}.'.domain'};
1778: $coursenumbuf{$env{'request.course.id'}}=
1779: $env{'course.'.$env{'request.course.id'}.'.num'};
1780: $coursehombuf{$env{'request.course.id'}}=
1781: $env{'course.'.$env{'request.course.id'}.'.home'};
1782: $coursedescrbuf{$env{'request.course.id'}}=
1783: $env{'course.'.$env{'request.course.id'}.'.description'};
1784: $courseinstcodebuf{$env{'request.course.id'}}=
1785: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1786: $courseownerbuf{$env{'request.course.id'}}=
1787: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1788: $coursetypebuf{$env{'request.course.id'}}=
1789: $env{'course.'.$env{'request.course.id'}.'.type'};
1790: if (defined $courselogs{$env{'request.course.id'}}) {
1791: $courselogs{$env{'request.course.id'}}.='&'.$what;
1792: } else {
1793: $courselogs{$env{'request.course.id'}}.=$what;
1794: }
1795: if (length($courselogs{$env{'request.course.id'}})>4048) {
1796: &flushcourselogs();
1797: }
1798: }
1799:
1800: sub courseacclog {
1801: my $fnsymb=shift;
1802: unless ($env{'request.course.id'}) { return ''; }
1803: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1804: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1805: $what.=':POST';
1806: # FIXME: Probably ought to escape things....
1807: foreach (keys %env) {
1808: if ($_=~/^form\.(.*)/) {
1809: $what.=':'.$1.'='.$env{$_};
1810: }
1811: }
1812: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1813: # FIXME: We should not be depending on a form parameter that someone
1814: # editing lonsearchcat.pm might change in the future.
1815: if ($env{'form.phase'} eq 'course_search') {
1816: $what.= ':POST';
1817: # FIXME: Probably ought to escape things....
1818: foreach my $element ('courseexp','crsfulltext','crsrelated',
1819: 'crsdiscuss') {
1820: $what.=':'.$element.'='.$env{'form.'.$element};
1821: }
1822: }
1823: }
1824: &courselog($what);
1825: }
1826:
1827: sub countacc {
1828: my $url=&declutter(shift);
1829: return if (! defined($url) || $url eq '');
1830: unless ($env{'request.course.id'}) { return ''; }
1831: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1832: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1833: $accesshash{$key}++;
1834: }
1835:
1836: sub linklog {
1837: my ($from,$to)=@_;
1838: $from=&declutter($from);
1839: $to=&declutter($to);
1840: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1841: $accesshash{$to.'___'.$from.'___goto'}=1;
1842: }
1843:
1844: sub userrolelog {
1845: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1846: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1847: ($trole=~/^in/) || ($trole=~/^cc/) ||
1848: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1849: ($trole=~/^ta/)) {
1850: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1851: $userrolehash
1852: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1853: =$tend.':'.$tstart;
1854: }
1855: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1856: ($trole=~/^li/) || ($trole=~/^li/) ||
1857: ($trole=~/^au/) || ($trole=~/^dg/) ||
1858: ($trole=~/^sc/)) {
1859: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1860: $domainrolehash
1861: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1862: = $tend.':'.$tstart;
1863: }
1864: }
1865:
1866: sub get_course_adv_roles {
1867: my $cid=shift;
1868: $cid=$env{'request.course.id'} unless (defined($cid));
1869: my %coursehash=&coursedescription($cid);
1870: my %nothide=();
1871: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1872: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1873: }
1874: my %returnhash=();
1875: my %dumphash=
1876: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1877: my $now=time;
1878: foreach (keys %dumphash) {
1879: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1880: if (($tstart) && ($tstart<0)) { next; }
1881: if (($tend) && ($tend<$now)) { next; }
1882: if (($tstart) && ($now<$tstart)) { next; }
1883: my ($role,$username,$domain,$section)=split(/\:/,$_);
1884: if ($username eq '' || $domain eq '') { next; }
1885: if ((&privileged($username,$domain)) &&
1886: (!$nothide{$username.':'.$domain})) { next; }
1887: if ($role eq 'cr') { next; }
1888: my $key=&plaintext($role);
1889: if ($role =~ /^cr/) {
1890: $key=(split('/',$role))[3];
1891: }
1892: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1893: if ($returnhash{$key}) {
1894: $returnhash{$key}.=','.$username.':'.$domain;
1895: } else {
1896: $returnhash{$key}=$username.':'.$domain;
1897: }
1898: }
1899: return %returnhash;
1900: }
1901:
1902: sub get_my_roles {
1903: my ($uname,$udom)=@_;
1904: unless (defined($uname)) { $uname=$env{'user.name'}; }
1905: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1906: my %dumphash=
1907: &dump('nohist_userroles',$udom,$uname);
1908: my %returnhash=();
1909: my $now=time;
1910: foreach (keys %dumphash) {
1911: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1912: if (($tstart) && ($tstart<0)) { next; }
1913: if (($tend) && ($tend<$now)) { next; }
1914: if (($tstart) && ($now<$tstart)) { next; }
1915: my ($role,$username,$domain,$section)=split(/\:/,$_);
1916: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1917: }
1918: return %returnhash;
1919: }
1920:
1921: # ----------------------------------------------------- Frontpage Announcements
1922: #
1923: #
1924:
1925: sub postannounce {
1926: my ($server,$text)=@_;
1927: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1928: unless ($text=~/\w/) { $text=''; }
1929: return &reply('setannounce:'.&escape($text),$server);
1930: }
1931:
1932: sub getannounce {
1933:
1934: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1935: my $announcement='';
1936: while (<$fh>) { $announcement .=$_; }
1937: close($fh);
1938: if ($announcement=~/\w/) {
1939: return
1940: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1941: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1942: } else {
1943: return '';
1944: }
1945: } else {
1946: return '';
1947: }
1948: }
1949:
1950: # ---------------------------------------------------------- Course ID routines
1951: # Deal with domain's nohist_courseid.db files
1952: #
1953:
1954: sub courseidput {
1955: my ($domain,$what,$coursehome)=@_;
1956: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1957: }
1958:
1959: sub courseiddump {
1960: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref,$typefilter)=@_;
1961: my %returnhash=();
1962: unless ($domfilter) { $domfilter=''; }
1963: foreach my $tryserver (keys %libserv) {
1964: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1965: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1966: foreach (
1967: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1968: $sincefilter.':'.&escape($descfilter).':'.
1969: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter).':'.&escape($typefilter),
1970: $tryserver))) {
1971: my ($key,$value)=split(/\=/,$_);
1972: if (($key) && ($value)) {
1973: $returnhash{&unescape($key)}=$value;
1974: }
1975: }
1976: }
1977: }
1978: }
1979: return %returnhash;
1980: }
1981:
1982: # ---------------------------------------------------------- DC e-mail
1983:
1984: sub dcmailput {
1985: my ($domain,$msgid,$message,$server)=@_;
1986: my $status = &Apache::lonnet::critical(
1987: 'dcmailput:'.$domain.':'.&escape($msgid).'='.
1988: &escape($message),$server);
1989: return $status;
1990: }
1991:
1992: sub dcmaildump {
1993: my ($dom,$startdate,$enddate,$senders) = @_;
1994: my %returnhash=();
1995: if (exists($domain_primary{$dom})) {
1996: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
1997: &escape($enddate).':';
1998: my @esc_senders=map { &escape($_)} @$senders;
1999: $cmd.=&escape(join('&',@esc_senders));
2000: foreach (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
2001: my ($key,$value) = split(/\=/,$_);
2002: if (($key) && ($value)) {
2003: $returnhash{&unescape($key)} = &unescape($value);
2004: }
2005: }
2006: }
2007: return %returnhash;
2008: }
2009: # ---------------------------------------------------------- Domain roles
2010:
2011: sub get_domain_roles {
2012: my ($dom,$roles,$startdate,$enddate)=@_;
2013: if (undef($startdate) || $startdate eq '') {
2014: $startdate = '.';
2015: }
2016: if (undef($enddate) || $enddate eq '') {
2017: $enddate = '.';
2018: }
2019: my $rolelist = join(':',@{$roles});
2020: my %personnel = ();
2021: foreach my $tryserver (keys(%libserv)) {
2022: if ($hostdom{$tryserver} eq $dom) {
2023: %{$personnel{$tryserver}}=();
2024: foreach (
2025: split(/\&/,&reply('domrolesdump:'.$dom.':'.
2026: &escape($startdate).':'.&escape($enddate).':'.
2027: &escape($rolelist), $tryserver))) {
2028: my($key,$value) = split(/\=/,$_);
2029: if (($key) && ($value)) {
2030: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2031: }
2032: }
2033: }
2034: }
2035: return %personnel;
2036: }
2037:
2038: # ----------------------------------------------------------- Check out an item
2039:
2040: sub get_first_access {
2041: my ($type,$argsymb)=@_;
2042: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2043: if ($argsymb) { $symb=$argsymb; }
2044: my ($map,$id,$res)=&decode_symb($symb);
2045: if ($type eq 'map') {
2046: $res=&symbread($map);
2047: } else {
2048: $res=$symb;
2049: }
2050: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2051: return $times{"$courseid\0$res"};
2052: }
2053:
2054: sub set_first_access {
2055: my ($type)=@_;
2056: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2057: my ($map,$id,$res)=&decode_symb($symb);
2058: if ($type eq 'map') {
2059: $res=&symbread($map);
2060: } else {
2061: $res=$symb;
2062: }
2063: my $firstaccess=&get_first_access($type,$symb);
2064: if (!$firstaccess) {
2065: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2066: }
2067: return 'already_set';
2068: }
2069:
2070: sub checkout {
2071: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2072: my $now=time;
2073: my $lonhost=$perlvar{'lonHostID'};
2074: my $infostr=&escape(
2075: 'CHECKOUTTOKEN&'.
2076: $tuname.'&'.
2077: $tudom.'&'.
2078: $tcrsid.'&'.
2079: $symb.'&'.
2080: $now.'&'.$ENV{'REMOTE_ADDR'});
2081: my $token=&reply('tmpput:'.$infostr,$lonhost);
2082: if ($token=~/^error\:/) {
2083: &logthis("<font color=\"blue\">WARNING: ".
2084: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2085: "</font>");
2086: return '';
2087: }
2088:
2089: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2090: $token=~tr/a-z/A-Z/;
2091:
2092: my %infohash=('resource.0.outtoken' => $token,
2093: 'resource.0.checkouttime' => $now,
2094: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2095:
2096: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2097: return '';
2098: } else {
2099: &logthis("<font color=\"blue\">WARNING: ".
2100: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2101: "</font>");
2102: }
2103:
2104: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2105: &escape('Checkout '.$infostr.' - '.
2106: $token)) ne 'ok') {
2107: return '';
2108: } else {
2109: &logthis("<font color=\"blue\">WARNING: ".
2110: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2111: "</font>");
2112: }
2113: return $token;
2114: }
2115:
2116: # ------------------------------------------------------------ Check in an item
2117:
2118: sub checkin {
2119: my $token=shift;
2120: my $now=time;
2121: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2122: $lonhost=~tr/A-Z/a-z/;
2123: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
2124: $dtoken=~s/\W/\_/g;
2125: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2126: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2127:
2128: unless (($tuname) && ($tudom)) {
2129: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2130: return '';
2131: }
2132:
2133: unless (&allowed('mgr',$tcrsid)) {
2134: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2135: $env{'user.name'}.' - '.$env{'user.domain'});
2136: return '';
2137: }
2138:
2139: my %infohash=('resource.0.intoken' => $token,
2140: 'resource.0.checkintime' => $now,
2141: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2142:
2143: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2144: return '';
2145: }
2146:
2147: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2148: &escape('Checkin - '.$token)) ne 'ok') {
2149: return '';
2150: }
2151:
2152: return ($symb,$tuname,$tudom,$tcrsid);
2153: }
2154:
2155: # --------------------------------------------- Set Expire Date for Spreadsheet
2156:
2157: sub expirespread {
2158: my ($uname,$udom,$stype,$usymb)=@_;
2159: my $cid=$env{'request.course.id'};
2160: if ($cid) {
2161: my $now=time;
2162: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2163: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2164: $env{'course.'.$cid.'.num'}.
2165: ':nohist_expirationdates:'.
2166: &escape($key).'='.$now,
2167: $env{'course.'.$cid.'.home'})
2168: }
2169: return 'ok';
2170: }
2171:
2172: # ----------------------------------------------------- Devalidate Spreadsheets
2173:
2174: sub devalidate {
2175: my ($symb,$uname,$udom)=@_;
2176: my $cid=$env{'request.course.id'};
2177: if ($cid) {
2178: # delete the stored spreadsheets for
2179: # - the student level sheet of this user in course's homespace
2180: # - the assessment level sheet for this resource
2181: # for this user in user's homespace
2182: # - current conditional state info
2183: my $key=$uname.':'.$udom.':';
2184: my $status=
2185: &del('nohist_calculatedsheets',
2186: [$key.'studentcalc:'],
2187: $env{'course.'.$cid.'.domain'},
2188: $env{'course.'.$cid.'.num'})
2189: .' '.
2190: &del('nohist_calculatedsheets_'.$cid,
2191: [$key.'assesscalc:'.$symb],$udom,$uname);
2192: unless ($status eq 'ok ok') {
2193: &logthis('Could not devalidate spreadsheet '.
2194: $uname.' at '.$udom.' for '.
2195: $symb.': '.$status);
2196: }
2197: &delenv('user.state.'.$cid);
2198: }
2199: }
2200:
2201: sub get_scalar {
2202: my ($string,$end) = @_;
2203: my $value;
2204: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2205: $value = $1;
2206: } elsif ($$string =~ s/^([^&]*?)&//) {
2207: $value = $1;
2208: }
2209: return &unescape($value);
2210: }
2211:
2212: sub array2str {
2213: my (@array) = @_;
2214: my $result=&arrayref2str(\@array);
2215: $result=~s/^__ARRAY_REF__//;
2216: $result=~s/__END_ARRAY_REF__$//;
2217: return $result;
2218: }
2219:
2220: sub arrayref2str {
2221: my ($arrayref) = @_;
2222: my $result='__ARRAY_REF__';
2223: foreach my $elem (@$arrayref) {
2224: if(ref($elem) eq 'ARRAY') {
2225: $result.=&arrayref2str($elem).'&';
2226: } elsif(ref($elem) eq 'HASH') {
2227: $result.=&hashref2str($elem).'&';
2228: } elsif(ref($elem)) {
2229: #print("Got a ref of ".(ref($elem))." skipping.");
2230: } else {
2231: $result.=&escape($elem).'&';
2232: }
2233: }
2234: $result=~s/\&$//;
2235: $result .= '__END_ARRAY_REF__';
2236: return $result;
2237: }
2238:
2239: sub hash2str {
2240: my (%hash) = @_;
2241: my $result=&hashref2str(\%hash);
2242: $result=~s/^__HASH_REF__//;
2243: $result=~s/__END_HASH_REF__$//;
2244: return $result;
2245: }
2246:
2247: sub hashref2str {
2248: my ($hashref)=@_;
2249: my $result='__HASH_REF__';
2250: foreach (sort(keys(%$hashref))) {
2251: if (ref($_) eq 'ARRAY') {
2252: $result.=&arrayref2str($_).'=';
2253: } elsif (ref($_) eq 'HASH') {
2254: $result.=&hashref2str($_).'=';
2255: } elsif (ref($_)) {
2256: $result.='=';
2257: #print("Got a ref of ".(ref($_))." skipping.");
2258: } else {
2259: if ($_) {$result.=&escape($_).'=';} else { last; }
2260: }
2261:
2262: if(ref($hashref->{$_}) eq 'ARRAY') {
2263: $result.=&arrayref2str($hashref->{$_}).'&';
2264: } elsif(ref($hashref->{$_}) eq 'HASH') {
2265: $result.=&hashref2str($hashref->{$_}).'&';
2266: } elsif(ref($hashref->{$_})) {
2267: $result.='&';
2268: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2269: } else {
2270: $result.=&escape($hashref->{$_}).'&';
2271: }
2272: }
2273: $result=~s/\&$//;
2274: $result .= '__END_HASH_REF__';
2275: return $result;
2276: }
2277:
2278: sub str2hash {
2279: my ($string)=@_;
2280: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2281: return %$hash;
2282: }
2283:
2284: sub str2hashref {
2285: my ($string) = @_;
2286:
2287: my %hash;
2288:
2289: if($string !~ /^__HASH_REF__/) {
2290: if (! ($string eq '' || !defined($string))) {
2291: $hash{'error'}='Not hash reference';
2292: }
2293: return (\%hash, $string);
2294: }
2295:
2296: $string =~ s/^__HASH_REF__//;
2297:
2298: while($string !~ /^__END_HASH_REF__/) {
2299: #key
2300: my $key='';
2301: if($string =~ /^__HASH_REF__/) {
2302: ($key, $string)=&str2hashref($string);
2303: if(defined($key->{'error'})) {
2304: $hash{'error'}='Bad data';
2305: return (\%hash, $string);
2306: }
2307: } elsif($string =~ /^__ARRAY_REF__/) {
2308: ($key, $string)=&str2arrayref($string);
2309: if($key->[0] eq 'Array reference error') {
2310: $hash{'error'}='Bad data';
2311: return (\%hash, $string);
2312: }
2313: } else {
2314: $string =~ s/^(.*?)=//;
2315: $key=&unescape($1);
2316: }
2317: $string =~ s/^=//;
2318:
2319: #value
2320: my $value='';
2321: if($string =~ /^__HASH_REF__/) {
2322: ($value, $string)=&str2hashref($string);
2323: if(defined($value->{'error'})) {
2324: $hash{'error'}='Bad data';
2325: return (\%hash, $string);
2326: }
2327: } elsif($string =~ /^__ARRAY_REF__/) {
2328: ($value, $string)=&str2arrayref($string);
2329: if($value->[0] eq 'Array reference error') {
2330: $hash{'error'}='Bad data';
2331: return (\%hash, $string);
2332: }
2333: } else {
2334: $value=&get_scalar(\$string,'__END_HASH_REF__');
2335: }
2336: $string =~ s/^&//;
2337:
2338: $hash{$key}=$value;
2339: }
2340:
2341: $string =~ s/^__END_HASH_REF__//;
2342:
2343: return (\%hash, $string);
2344: }
2345:
2346: sub str2array {
2347: my ($string)=@_;
2348: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2349: return @$array;
2350: }
2351:
2352: sub str2arrayref {
2353: my ($string) = @_;
2354: my @array;
2355:
2356: if($string !~ /^__ARRAY_REF__/) {
2357: if (! ($string eq '' || !defined($string))) {
2358: $array[0]='Array reference error';
2359: }
2360: return (\@array, $string);
2361: }
2362:
2363: $string =~ s/^__ARRAY_REF__//;
2364:
2365: while($string !~ /^__END_ARRAY_REF__/) {
2366: my $value='';
2367: if($string =~ /^__HASH_REF__/) {
2368: ($value, $string)=&str2hashref($string);
2369: if(defined($value->{'error'})) {
2370: $array[0] ='Array reference error';
2371: return (\@array, $string);
2372: }
2373: } elsif($string =~ /^__ARRAY_REF__/) {
2374: ($value, $string)=&str2arrayref($string);
2375: if($value->[0] eq 'Array reference error') {
2376: $array[0] ='Array reference error';
2377: return (\@array, $string);
2378: }
2379: } else {
2380: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2381: }
2382: $string =~ s/^&//;
2383:
2384: push(@array, $value);
2385: }
2386:
2387: $string =~ s/^__END_ARRAY_REF__//;
2388:
2389: return (\@array, $string);
2390: }
2391:
2392: # -------------------------------------------------------------------Temp Store
2393:
2394: sub tmpreset {
2395: my ($symb,$namespace,$domain,$stuname) = @_;
2396: if (!$symb) {
2397: $symb=&symbread();
2398: if (!$symb) { $symb= $env{'request.url'}; }
2399: }
2400: $symb=escape($symb);
2401:
2402: if (!$namespace) { $namespace=$env{'request.state'}; }
2403: $namespace=~s/\//\_/g;
2404: $namespace=~s/\W//g;
2405:
2406: if (!$domain) { $domain=$env{'user.domain'}; }
2407: if (!$stuname) { $stuname=$env{'user.name'}; }
2408: if ($domain eq 'public' && $stuname eq 'public') {
2409: $stuname=$ENV{'REMOTE_ADDR'};
2410: }
2411: my $path=$perlvar{'lonDaemons'}.'/tmp';
2412: my %hash;
2413: if (tie(%hash,'GDBM_File',
2414: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2415: &GDBM_WRCREAT(),0640)) {
2416: foreach my $key (keys %hash) {
2417: if ($key=~ /:$symb/) {
2418: delete($hash{$key});
2419: }
2420: }
2421: }
2422: }
2423:
2424: sub tmpstore {
2425: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2426:
2427: if (!$symb) {
2428: $symb=&symbread();
2429: if (!$symb) { $symb= $env{'request.url'}; }
2430: }
2431: $symb=escape($symb);
2432:
2433: if (!$namespace) {
2434: # I don't think we would ever want to store this for a course.
2435: # it seems this will only be used if we don't have a course.
2436: #$namespace=$env{'request.course.id'};
2437: #if (!$namespace) {
2438: $namespace=$env{'request.state'};
2439: #}
2440: }
2441: $namespace=~s/\//\_/g;
2442: $namespace=~s/\W//g;
2443: if (!$domain) { $domain=$env{'user.domain'}; }
2444: if (!$stuname) { $stuname=$env{'user.name'}; }
2445: if ($domain eq 'public' && $stuname eq 'public') {
2446: $stuname=$ENV{'REMOTE_ADDR'};
2447: }
2448: my $now=time;
2449: my %hash;
2450: my $path=$perlvar{'lonDaemons'}.'/tmp';
2451: if (tie(%hash,'GDBM_File',
2452: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2453: &GDBM_WRCREAT(),0640)) {
2454: $hash{"version:$symb"}++;
2455: my $version=$hash{"version:$symb"};
2456: my $allkeys='';
2457: foreach my $key (keys(%$storehash)) {
2458: $allkeys.=$key.':';
2459: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2460: }
2461: $hash{"$version:$symb:timestamp"}=$now;
2462: $allkeys.='timestamp';
2463: $hash{"$version:keys:$symb"}=$allkeys;
2464: if (untie(%hash)) {
2465: return 'ok';
2466: } else {
2467: return "error:$!";
2468: }
2469: } else {
2470: return "error:$!";
2471: }
2472: }
2473:
2474: # -----------------------------------------------------------------Temp Restore
2475:
2476: sub tmprestore {
2477: my ($symb,$namespace,$domain,$stuname) = @_;
2478:
2479: if (!$symb) {
2480: $symb=&symbread();
2481: if (!$symb) { $symb= $env{'request.url'}; }
2482: }
2483: $symb=escape($symb);
2484:
2485: if (!$namespace) { $namespace=$env{'request.state'}; }
2486:
2487: if (!$domain) { $domain=$env{'user.domain'}; }
2488: if (!$stuname) { $stuname=$env{'user.name'}; }
2489: if ($domain eq 'public' && $stuname eq 'public') {
2490: $stuname=$ENV{'REMOTE_ADDR'};
2491: }
2492: my %returnhash;
2493: $namespace=~s/\//\_/g;
2494: $namespace=~s/\W//g;
2495: my %hash;
2496: my $path=$perlvar{'lonDaemons'}.'/tmp';
2497: if (tie(%hash,'GDBM_File',
2498: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2499: &GDBM_READER(),0640)) {
2500: my $version=$hash{"version:$symb"};
2501: $returnhash{'version'}=$version;
2502: my $scope;
2503: for ($scope=1;$scope<=$version;$scope++) {
2504: my $vkeys=$hash{"$scope:keys:$symb"};
2505: my @keys=split(/:/,$vkeys);
2506: my $key;
2507: $returnhash{"$scope:keys"}=$vkeys;
2508: foreach $key (@keys) {
2509: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2510: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2511: }
2512: }
2513: if (!(untie(%hash))) {
2514: return "error:$!";
2515: }
2516: } else {
2517: return "error:$!";
2518: }
2519: return %returnhash;
2520: }
2521:
2522: # ----------------------------------------------------------------------- Store
2523:
2524: sub store {
2525: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2526: my $home='';
2527:
2528: if ($stuname) { $home=&homeserver($stuname,$domain); }
2529:
2530: $symb=&symbclean($symb);
2531: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2532:
2533: if (!$domain) { $domain=$env{'user.domain'}; }
2534: if (!$stuname) { $stuname=$env{'user.name'}; }
2535:
2536: &devalidate($symb,$stuname,$domain);
2537:
2538: $symb=escape($symb);
2539: if (!$namespace) {
2540: unless ($namespace=$env{'request.course.id'}) {
2541: return '';
2542: }
2543: }
2544: if (!$home) { $home=$env{'user.home'}; }
2545:
2546: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2547: $$storehash{'host'}=$perlvar{'lonHostID'};
2548:
2549: my $namevalue='';
2550: foreach (keys %$storehash) {
2551: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2552: }
2553: $namevalue=~s/\&$//;
2554: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2555: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2556: }
2557:
2558: # -------------------------------------------------------------- Critical Store
2559:
2560: sub cstore {
2561: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2562: my $home='';
2563:
2564: if ($stuname) { $home=&homeserver($stuname,$domain); }
2565:
2566: $symb=&symbclean($symb);
2567: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2568:
2569: if (!$domain) { $domain=$env{'user.domain'}; }
2570: if (!$stuname) { $stuname=$env{'user.name'}; }
2571:
2572: &devalidate($symb,$stuname,$domain);
2573:
2574: $symb=escape($symb);
2575: if (!$namespace) {
2576: unless ($namespace=$env{'request.course.id'}) {
2577: return '';
2578: }
2579: }
2580: if (!$home) { $home=$env{'user.home'}; }
2581:
2582: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2583: $$storehash{'host'}=$perlvar{'lonHostID'};
2584:
2585: my $namevalue='';
2586: foreach (keys %$storehash) {
2587: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2588: }
2589: $namevalue=~s/\&$//;
2590: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2591: return critical
2592: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2593: }
2594:
2595: # --------------------------------------------------------------------- Restore
2596:
2597: sub restore {
2598: my ($symb,$namespace,$domain,$stuname) = @_;
2599: my $home='';
2600:
2601: if ($stuname) { $home=&homeserver($stuname,$domain); }
2602:
2603: if (!$symb) {
2604: unless ($symb=escape(&symbread())) { return ''; }
2605: } else {
2606: $symb=&escape(&symbclean($symb));
2607: }
2608: if (!$namespace) {
2609: unless ($namespace=$env{'request.course.id'}) {
2610: return '';
2611: }
2612: }
2613: if (!$domain) { $domain=$env{'user.domain'}; }
2614: if (!$stuname) { $stuname=$env{'user.name'}; }
2615: if (!$home) { $home=$env{'user.home'}; }
2616: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2617:
2618: my %returnhash=();
2619: foreach (split(/\&/,$answer)) {
2620: my ($name,$value)=split(/\=/,$_);
2621: $returnhash{&unescape($name)}=&thaw_unescape($value);
2622: }
2623: my $version;
2624: for ($version=1;$version<=$returnhash{'version'};$version++) {
2625: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2626: $returnhash{$_}=$returnhash{$version.':'.$_};
2627: }
2628: }
2629: return %returnhash;
2630: }
2631:
2632: # ---------------------------------------------------------- Course Description
2633:
2634: sub coursedescription {
2635: my ($courseid,$args)=@_;
2636: $courseid=~s/^\///;
2637: $courseid=~s/\_/\//g;
2638: my ($cdomain,$cnum)=split(/\//,$courseid);
2639: my $chome=&homeserver($cnum,$cdomain);
2640: my $normalid=$cdomain.'_'.$cnum;
2641: # need to always cache even if we get errors otherwise we keep
2642: # trying and trying and trying to get the course description.
2643: my %envhash=();
2644: my %returnhash=();
2645:
2646: my $expiretime=600;
2647: if ($env{'request.course.id'} eq $normalid) {
2648: $expiretime=120;
2649: }
2650:
2651: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
2652: if (!$args->{'freshen_cache'}
2653: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
2654: foreach my $key (keys(%env)) {
2655: next if ($key !~ /^\Q$prefix\E(.*)/);
2656: my ($setting) = $1;
2657: $returnhash{$setting} = $env{$key};
2658: }
2659: return %returnhash;
2660: }
2661:
2662: # get the data agin
2663: if (!$args->{'one_time'}) {
2664: $envhash{'course.'.$normalid.'.last_cache'}=time;
2665: }
2666: if ($chome ne 'no_host') {
2667: %returnhash=&dump('environment',$cdomain,$cnum);
2668: if (!exists($returnhash{'con_lost'})) {
2669: $returnhash{'home'}= $chome;
2670: $returnhash{'domain'} = $cdomain;
2671: $returnhash{'num'} = $cnum;
2672: if (!defined($returnhash{'type'})) {
2673: $returnhash{'type'} = 'Course';
2674: }
2675: while (my ($name,$value) = each %returnhash) {
2676: $envhash{'course.'.$normalid.'.'.$name}=$value;
2677: }
2678: $returnhash{'url'}=&clutter($returnhash{'url'});
2679: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2680: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2681: $envhash{'course.'.$normalid.'.home'}=$chome;
2682: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2683: $envhash{'course.'.$normalid.'.num'}=$cnum;
2684: }
2685: }
2686: if (!$args->{'one_time'}) {
2687: &appenv(%envhash);
2688: }
2689: return %returnhash;
2690: }
2691:
2692: # -------------------------------------------------See if a user is privileged
2693:
2694: sub privileged {
2695: my ($username,$domain)=@_;
2696: my $rolesdump=&reply("dump:$domain:$username:roles",
2697: &homeserver($username,$domain));
2698: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2699: my $now=time;
2700: if ($rolesdump ne '') {
2701: foreach (split(/&/,$rolesdump)) {
2702: if ($_!~/^rolesdef_/) {
2703: my ($area,$role)=split(/=/,$_);
2704: $area=~s/\_\w\w$//;
2705: my ($trole,$tend,$tstart)=split(/_/,$role);
2706: if (($trole eq 'dc') || ($trole eq 'su')) {
2707: my $active=1;
2708: if ($tend) {
2709: if ($tend<$now) { $active=0; }
2710: }
2711: if ($tstart) {
2712: if ($tstart>$now) { $active=0; }
2713: }
2714: if ($active) { return 1; }
2715: }
2716: }
2717: }
2718: }
2719: return 0;
2720: }
2721:
2722: # -------------------------------------------------------- Get user privileges
2723:
2724: sub rolesinit {
2725: my ($domain,$username,$authhost)=@_;
2726: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2727: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2728: my %allroles=();
2729: my %allgroups=();
2730: my $now=time;
2731: my %userroles = ('user.login.time' => $now);
2732: my $group_privs;
2733:
2734: if ($rolesdump ne '') {
2735: foreach (split(/&/,$rolesdump)) {
2736: if ($_!~/^rolesdef_/) {
2737: my ($area,$role)=split(/=/,$_);
2738: $area=~s/\_\w\w$//;
2739: my ($trole,$tend,$tstart,$group_privs);
2740: if ($role=~/^cr/) {
2741: if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
2742: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2743: ($tend,$tstart)=split('_',$trest);
2744: } else {
2745: $trole=$role;
2746: }
2747: } elsif ($role =~ m|^gr/|) {
2748: ($trole,$tend,$tstart) = split(/_/,$role);
2749: ($trole,$group_privs) = split(/\//,$trole);
2750: $group_privs = &unescape($group_privs);
2751: } else {
2752: ($trole,$tend,$tstart)=split(/_/,$role);
2753: }
2754: my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
2755: $username);
2756: @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
2757: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2758: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2759: if (($area ne '') && ($trole ne '')) {
2760: my $spec=$trole.'.'.$area;
2761: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2762: if ($trole =~ /^cr\//) {
2763: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2764: } elsif ($trole eq 'gr') {
2765: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2766: } else {
2767: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2768: }
2769: }
2770: }
2771: }
2772: my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
2773: $userroles{'user.adv'} = $adv;
2774: $userroles{'user.author'} = $author;
2775: $env{'user.adv'}=$adv;
2776: }
2777: return \%userroles;
2778: }
2779:
2780: sub set_arearole {
2781: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2782: # log the associated role with the area
2783: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2784: return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
2785: }
2786:
2787: sub custom_roleprivs {
2788: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2789: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2790: my $homsvr=homeserver($rauthor,$rdomain);
2791: if ($hostname{$homsvr} ne '') {
2792: my ($rdummy,$roledef)=
2793: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2794: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2795: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2796: if (defined($syspriv)) {
2797: $$allroles{'cm./'}.=':'.$syspriv;
2798: $$allroles{$spec.'./'}.=':'.$syspriv;
2799: }
2800: if ($tdomain ne '') {
2801: if (defined($dompriv)) {
2802: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2803: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2804: }
2805: if (($trest ne '') && (defined($coursepriv))) {
2806: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2807: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2808: }
2809: }
2810: }
2811: }
2812: }
2813:
2814: sub group_roleprivs {
2815: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2816: my $access = 1;
2817: my $now = time;
2818: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2819: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2820: if ($access) {
2821: my ($course,$group) = ($area =~ m|(/\w+/\w+)/([^/]+)$|);
2822: $$allgroups{$course}{$group} .=':'.$group_privs;
2823: }
2824: }
2825:
2826: sub standard_roleprivs {
2827: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2828: if (defined($pr{$trole.':s'})) {
2829: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2830: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2831: }
2832: if ($tdomain ne '') {
2833: if (defined($pr{$trole.':d'})) {
2834: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2835: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2836: }
2837: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2838: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2839: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2840: }
2841: }
2842: }
2843:
2844: sub set_userprivs {
2845: my ($userroles,$allroles,$allgroups) = @_;
2846: my $author=0;
2847: my $adv=0;
2848: my %grouproles = ();
2849: if (keys(%{$allgroups}) > 0) {
2850: foreach my $role (keys %{$allroles}) {
2851: my ($trole,$area,$sec,$extendedarea);
2852: if ($role =~ m|^(\w+)\.(/\w+/\w+)(/?\w*)|) {
2853: $trole = $1;
2854: $area = $2;
2855: $sec = $3;
2856: $extendedarea = $area.$sec;
2857: if (exists($$allgroups{$area})) {
2858: foreach my $group (keys(%{$$allgroups{$area}})) {
2859: my $spec = $trole.'.'.$extendedarea;
2860: $grouproles{$spec.'.'.$area.'/'.$group} =
2861: $$allgroups{$area}{$group};
2862: }
2863: }
2864: }
2865: }
2866: }
2867: foreach (keys(%grouproles)) {
2868: $$allroles{$_} = $grouproles{$_};
2869: }
2870: foreach (keys %{$allroles}) {
2871: my %thesepriv=();
2872: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2873: foreach (split(/:/,$$allroles{$_})) {
2874: if ($_ ne '') {
2875: my ($privilege,$restrictions)=split(/&/,$_);
2876: if ($restrictions eq '') {
2877: $thesepriv{$privilege}='F';
2878: } elsif ($thesepriv{$privilege} ne 'F') {
2879: $thesepriv{$privilege}.=$restrictions;
2880: }
2881: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2882: }
2883: }
2884: my $thesestr='';
2885: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2886: $userroles->{'user.priv.'.$_} = $thesestr;
2887: }
2888: return ($author,$adv);
2889: }
2890:
2891: # --------------------------------------------------------------- get interface
2892:
2893: sub get {
2894: my ($namespace,$storearr,$udomain,$uname)=@_;
2895: my $items='';
2896: foreach (@$storearr) {
2897: $items.=escape($_).'&';
2898: }
2899: $items=~s/\&$//;
2900: if (!$udomain) { $udomain=$env{'user.domain'}; }
2901: if (!$uname) { $uname=$env{'user.name'}; }
2902: my $uhome=&homeserver($uname,$udomain);
2903:
2904: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2905: my @pairs=split(/\&/,$rep);
2906: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2907: return @pairs;
2908: }
2909: my %returnhash=();
2910: my $i=0;
2911: foreach (@$storearr) {
2912: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2913: $i++;
2914: }
2915: return %returnhash;
2916: }
2917:
2918: # --------------------------------------------------------------- del interface
2919:
2920: sub del {
2921: my ($namespace,$storearr,$udomain,$uname)=@_;
2922: my $items='';
2923: foreach (@$storearr) {
2924: $items.=escape($_).'&';
2925: }
2926: $items=~s/\&$//;
2927: if (!$udomain) { $udomain=$env{'user.domain'}; }
2928: if (!$uname) { $uname=$env{'user.name'}; }
2929: my $uhome=&homeserver($uname,$udomain);
2930:
2931: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2932: }
2933:
2934: # -------------------------------------------------------------- dump interface
2935:
2936: sub dump {
2937: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2938: if (!$udomain) { $udomain=$env{'user.domain'}; }
2939: if (!$uname) { $uname=$env{'user.name'}; }
2940: my $uhome=&homeserver($uname,$udomain);
2941: if ($regexp) {
2942: $regexp=&escape($regexp);
2943: } else {
2944: $regexp='.';
2945: }
2946: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
2947: my @pairs=split(/\&/,$rep);
2948: my %returnhash=();
2949: foreach my $item (@pairs) {
2950: my ($key,$value)=split(/=/,$item,2);
2951: $key = &unescape($key);
2952: next if ($key =~ /^error: 2 /);
2953: $returnhash{$key}=&thaw_unescape($value);
2954: }
2955: return %returnhash;
2956: }
2957:
2958: # --------------------------------------------------------- dumpstore interface
2959:
2960: sub dumpstore {
2961: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2962: return &dump($namespace,$udomain,$uname,$regexp,$range);
2963: }
2964:
2965: # -------------------------------------------------------------- keys interface
2966:
2967: sub getkeys {
2968: my ($namespace,$udomain,$uname)=@_;
2969: if (!$udomain) { $udomain=$env{'user.domain'}; }
2970: if (!$uname) { $uname=$env{'user.name'}; }
2971: my $uhome=&homeserver($uname,$udomain);
2972: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2973: my @keyarray=();
2974: foreach (split(/\&/,$rep)) {
2975: push (@keyarray,&unescape($_));
2976: }
2977: return @keyarray;
2978: }
2979:
2980: # --------------------------------------------------------------- currentdump
2981: sub currentdump {
2982: my ($courseid,$sdom,$sname)=@_;
2983: $courseid = $env{'request.course.id'} if (! defined($courseid));
2984: $sdom = $env{'user.domain'} if (! defined($sdom));
2985: $sname = $env{'user.name'} if (! defined($sname));
2986: my $uhome = &homeserver($sname,$sdom);
2987: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2988: return if ($rep =~ /^(error:|no_such_host)/);
2989: #
2990: my %returnhash=();
2991: #
2992: if ($rep eq "unknown_cmd") {
2993: # an old lond will not know currentdump
2994: # Do a dump and make it look like a currentdump
2995: my @tmp = &dump($courseid,$sdom,$sname,'.');
2996: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2997: my %hash = @tmp;
2998: @tmp=();
2999: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
3000: } else {
3001: my @pairs=split(/\&/,$rep);
3002: foreach (@pairs) {
3003: my ($key,$value)=split(/=/,$_);
3004: my ($symb,$param) = split(/:/,$key);
3005: $returnhash{&unescape($symb)}->{&unescape($param)} =
3006: &thaw_unescape($value);
3007: }
3008: }
3009: return %returnhash;
3010: }
3011:
3012: sub convert_dump_to_currentdump{
3013: my %hash = %{shift()};
3014: my %returnhash;
3015: # Code ripped from lond, essentially. The only difference
3016: # here is the unescaping done by lonnet::dump(). Conceivably
3017: # we might run in to problems with parameter names =~ /^v\./
3018: while (my ($key,$value) = each(%hash)) {
3019: my ($v,$symb,$param) = split(/:/,$key);
3020: next if ($v eq 'version' || $symb eq 'keys');
3021: next if (exists($returnhash{$symb}) &&
3022: exists($returnhash{$symb}->{$param}) &&
3023: $returnhash{$symb}->{'v.'.$param} > $v);
3024: $returnhash{$symb}->{$param}=$value;
3025: $returnhash{$symb}->{'v.'.$param}=$v;
3026: }
3027: #
3028: # Remove all of the keys in the hashes which keep track of
3029: # the version of the parameter.
3030: while (my ($symb,$param_hash) = each(%returnhash)) {
3031: # use a foreach because we are going to delete from the hash.
3032: foreach my $key (keys(%$param_hash)) {
3033: delete($param_hash->{$key}) if ($key =~ /^v\./);
3034: }
3035: }
3036: return \%returnhash;
3037: }
3038:
3039: # ------------------------------------------------------ critical inc interface
3040:
3041: sub cinc {
3042: return &inc(@_,'critical');
3043: }
3044:
3045: # --------------------------------------------------------------- inc interface
3046:
3047: sub inc {
3048: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3049: if (!$udomain) { $udomain=$env{'user.domain'}; }
3050: if (!$uname) { $uname=$env{'user.name'}; }
3051: my $uhome=&homeserver($uname,$udomain);
3052: my $items='';
3053: if (! ref($store)) {
3054: # got a single value, so use that instead
3055: $items = &escape($store).'=&';
3056: } elsif (ref($store) eq 'SCALAR') {
3057: $items = &escape($$store).'=&';
3058: } elsif (ref($store) eq 'ARRAY') {
3059: $items = join('=&',map {&escape($_);} @{$store});
3060: } elsif (ref($store) eq 'HASH') {
3061: while (my($key,$value) = each(%{$store})) {
3062: $items.= &escape($key).'='.&escape($value).'&';
3063: }
3064: }
3065: $items=~s/\&$//;
3066: if ($critical) {
3067: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3068: } else {
3069: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3070: }
3071: }
3072:
3073: # --------------------------------------------------------------- put interface
3074:
3075: sub put {
3076: my ($namespace,$storehash,$udomain,$uname)=@_;
3077: if (!$udomain) { $udomain=$env{'user.domain'}; }
3078: if (!$uname) { $uname=$env{'user.name'}; }
3079: my $uhome=&homeserver($uname,$udomain);
3080: my $items='';
3081: foreach (keys %$storehash) {
3082: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3083: }
3084: $items=~s/\&$//;
3085: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3086: }
3087:
3088: # ------------------------------------------------------------ newput interface
3089:
3090: sub newput {
3091: my ($namespace,$storehash,$udomain,$uname)=@_;
3092: if (!$udomain) { $udomain=$env{'user.domain'}; }
3093: if (!$uname) { $uname=$env{'user.name'}; }
3094: my $uhome=&homeserver($uname,$udomain);
3095: my $items='';
3096: foreach my $key (keys(%$storehash)) {
3097: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3098: }
3099: $items=~s/\&$//;
3100: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3101: }
3102:
3103: # --------------------------------------------------------- putstore interface
3104:
3105: sub putstore {
3106: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3107: if (!$udomain) { $udomain=$env{'user.domain'}; }
3108: if (!$uname) { $uname=$env{'user.name'}; }
3109: my $uhome=&homeserver($uname,$udomain);
3110: my $items='';
3111: foreach my $key (keys(%$storehash)) {
3112: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3113: }
3114: $items=~s/\&$//;
3115: my $esc_symb=&escape($symb);
3116: my $esc_v=&escape($version);
3117: my $reply =
3118: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3119: $uhome);
3120: if ($reply eq 'unknown_cmd') {
3121: # gfall back to way things use to be done
3122: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3123: $uname);
3124: }
3125: return $reply;
3126: }
3127:
3128: sub old_putstore {
3129: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3130: if (!$udomain) { $udomain=$env{'user.domain'}; }
3131: if (!$uname) { $uname=$env{'user.name'}; }
3132: my $uhome=&homeserver($uname,$udomain);
3133: my %newstorehash;
3134: foreach (keys %$storehash) {
3135: my $key = $version.':'.&escape($symb).':'.$_;
3136: $newstorehash{$key} = $storehash->{$_};
3137: }
3138: my $items='';
3139: my %allitems = ();
3140: foreach (keys %newstorehash) {
3141: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3142: my $key = $1.':keys:'.$2;
3143: $allitems{$key} .= $3.':';
3144: }
3145: $items.=$_.'='.&freeze_escape($newstorehash{$_}).'&';
3146: }
3147: foreach (keys %allitems) {
3148: $allitems{$_} =~ s/\:$//;
3149: $items.= $_.'='.$allitems{$_}.'&';
3150: }
3151: $items=~s/\&$//;
3152: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3153: }
3154:
3155: # ------------------------------------------------------ critical put interface
3156:
3157: sub cput {
3158: my ($namespace,$storehash,$udomain,$uname)=@_;
3159: if (!$udomain) { $udomain=$env{'user.domain'}; }
3160: if (!$uname) { $uname=$env{'user.name'}; }
3161: my $uhome=&homeserver($uname,$udomain);
3162: my $items='';
3163: foreach (keys %$storehash) {
3164: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3165: }
3166: $items=~s/\&$//;
3167: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3168: }
3169:
3170: # -------------------------------------------------------------- eget interface
3171:
3172: sub eget {
3173: my ($namespace,$storearr,$udomain,$uname)=@_;
3174: my $items='';
3175: foreach (@$storearr) {
3176: $items.=escape($_).'&';
3177: }
3178: $items=~s/\&$//;
3179: if (!$udomain) { $udomain=$env{'user.domain'}; }
3180: if (!$uname) { $uname=$env{'user.name'}; }
3181: my $uhome=&homeserver($uname,$udomain);
3182: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3183: my @pairs=split(/\&/,$rep);
3184: my %returnhash=();
3185: my $i=0;
3186: foreach (@$storearr) {
3187: $returnhash{$_}=&thaw_unescape($pairs[$i]);
3188: $i++;
3189: }
3190: return %returnhash;
3191: }
3192:
3193: # ------------------------------------------------------------ tmpput interface
3194: sub tmpput {
3195: my ($storehash,$server)=@_;
3196: my $items='';
3197: foreach (keys(%$storehash)) {
3198: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3199: }
3200: $items=~s/\&$//;
3201: return &reply("tmpput:$items",$server);
3202: }
3203:
3204: # ------------------------------------------------------------ tmpget interface
3205: sub tmpget {
3206: my ($token,$server)=@_;
3207: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3208: my $rep=&reply("tmpget:$token",$server);
3209: my %returnhash;
3210: foreach my $item (split(/\&/,$rep)) {
3211: my ($key,$value)=split(/=/,$item);
3212: $returnhash{&unescape($key)}=&thaw_unescape($value);
3213: }
3214: return %returnhash;
3215: }
3216:
3217: # ------------------------------------------------------------ tmpget interface
3218: sub tmpdel {
3219: my ($token,$server)=@_;
3220: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3221: return &reply("tmpdel:$token",$server);
3222: }
3223:
3224: # ---------------------------------------------- Custom access rule evaluation
3225:
3226: sub customaccess {
3227: my ($priv,$uri)=@_;
3228: my ($urole,$urealm)=split(/\./,$env{'request.role'});
3229: $urealm=~s/^\W//;
3230: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
3231: my $access=0;
3232: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3233: my ($effect,$realm,$role)=split(/\:/,$_);
3234: if ($role) {
3235: if ($role ne $urole) { next; }
3236: }
3237: foreach (split(/\s*\,\s*/,$realm)) {
3238: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
3239: if ($tdom) {
3240: if ($tdom ne $udom) { next; }
3241: }
3242: if ($tcrs) {
3243: if ($tcrs ne $ucrs) { next; }
3244: }
3245: if ($tsec) {
3246: if ($tsec ne $usec) { next; }
3247: }
3248: $access=($effect eq 'allow');
3249: last;
3250: }
3251: if ($realm eq '' && $role eq '') {
3252: $access=($effect eq 'allow');
3253: }
3254: }
3255: return $access;
3256: }
3257:
3258: # ------------------------------------------------- Check for a user privilege
3259:
3260: sub allowed {
3261: my ($priv,$uri,$symb)=@_;
3262: my $ver_orguri=$uri;
3263: $uri=&deversion($uri);
3264: my $orguri=$uri;
3265: $uri=&declutter($uri);
3266:
3267: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3268: # Free bre access to adm and meta resources
3269: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
3270: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
3271: return 'F';
3272: }
3273:
3274: # Free bre access to user's own portfolio contents
3275: my ($space,$domain,$name,@dir)=split('/',$uri);
3276: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3277: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
3278: return 'F';
3279: }
3280:
3281: # bre access to group if user has rgf priv for this group and course.
3282: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
3283: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
3284: if (exists($env{'request.course.id'})) {
3285: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
3286: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
3287: if (($domain eq $cdom) && ($name eq $cnum)) {
3288: my $courseprivid=$env{'request.course.id'};
3289: $courseprivid=~s/\_/\//;
3290: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
3291: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
3292: return $1;
3293: }
3294: }
3295: }
3296: }
3297:
3298: # Free bre to public access
3299:
3300: if ($priv eq 'bre') {
3301: my $copyright=&metadata($uri,'copyright');
3302: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3303: return 'F';
3304: }
3305: if ($copyright eq 'priv') {
3306: $uri=~/([^\/]+)\/([^\/]+)\//;
3307: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3308: return '';
3309: }
3310: }
3311: if ($copyright eq 'domain') {
3312: $uri=~/([^\/]+)\/([^\/]+)\//;
3313: unless (($env{'user.domain'} eq $1) ||
3314: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3315: return '';
3316: }
3317: }
3318: if ($env{'request.role'}=~ /li\.\//) {
3319: # Library role, so allow browsing of resources in this domain.
3320: return 'F';
3321: }
3322: if ($copyright eq 'custom') {
3323: unless (&customaccess($priv,$uri)) { return ''; }
3324: }
3325: }
3326: # Domain coordinator is trying to create a course
3327: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3328: # uri is the requested domain in this case.
3329: # comparison to 'request.role.domain' shows if the user has selected
3330: # a role of dc for the domain in question.
3331: return 'F' if ($uri eq $env{'request.role.domain'});
3332: }
3333:
3334: my $thisallowed='';
3335: my $statecond=0;
3336: my $courseprivid='';
3337:
3338: # Course
3339:
3340: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3341: $thisallowed.=$1;
3342: }
3343:
3344: # Domain
3345:
3346: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3347: =~/\Q$priv\E\&([^\:]*)/) {
3348: $thisallowed.=$1;
3349: }
3350:
3351: # Course: uri itself is a course
3352: my $courseuri=$uri;
3353: $courseuri=~s/\_(\d)/\/$1/;
3354: $courseuri=~s/^([^\/])/\/$1/;
3355:
3356: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3357: =~/\Q$priv\E\&([^\:]*)/) {
3358: $thisallowed.=$1;
3359: }
3360:
3361: # Group: uri itself is a group
3362: my $groupuri=$uri;
3363: $groupuri=~s/^([^\/])/\/$1/;
3364: if ($env{'user.priv.'.$env{'request.role'}.'.'.$groupuri}
3365: =~/\Q$priv\E\&([^\:]*)/) {
3366: $thisallowed.=$1;
3367: }
3368:
3369: # URI is an uploaded document for this course, default permissions don't matter
3370: # not allowing 'edit' access (editupload) to uploaded course docs
3371: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3372: $thisallowed='';
3373: my ($match)=&is_on_map($uri);
3374: if ($match) {
3375: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3376: =~/\Q$priv\E\&([^\:]*)/) {
3377: $thisallowed.=$1;
3378: }
3379: } else {
3380: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
3381: if ($refuri) {
3382: if ($refuri =~ m|^/adm/|) {
3383: $thisallowed='F';
3384: } else {
3385: $refuri=&declutter($refuri);
3386: my ($match) = &is_on_map($refuri);
3387: if ($match) {
3388: $thisallowed='F';
3389: }
3390: }
3391: }
3392: }
3393: }
3394:
3395: # Full access at system, domain or course-wide level? Exit.
3396:
3397: if ($thisallowed=~/F/) {
3398: return 'F';
3399: }
3400:
3401: # If this is generating or modifying users, exit with special codes
3402:
3403: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3404: if (($priv eq 'cca') || ($priv eq 'caa')) {
3405: my ($audom,$auname)=split('/',$uri);
3406: # no author name given, so this just checks on the general right to make a co-author in this domain
3407: unless ($auname) { return $thisallowed; }
3408: # an author name is given, so we are about to actually make a co-author for a certain account
3409: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3410: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3411: ($audom ne $env{'request.role.domain'}))) { return ''; }
3412: }
3413: return $thisallowed;
3414: }
3415: #
3416: # Gathered so far: system, domain and course wide privileges
3417: #
3418: # Course: See if uri or referer is an individual resource that is part of
3419: # the course
3420:
3421: if ($env{'request.course.id'}) {
3422:
3423: $courseprivid=$env{'request.course.id'};
3424: if ($env{'request.course.sec'}) {
3425: $courseprivid.='/'.$env{'request.course.sec'};
3426: }
3427: $courseprivid=~s/\_/\//;
3428: my $checkreferer=1;
3429: my ($match,$cond)=&is_on_map($uri);
3430: if ($match) {
3431: $statecond=$cond;
3432: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3433: =~/\Q$priv\E\&([^\:]*)/) {
3434: $thisallowed.=$1;
3435: $checkreferer=0;
3436: }
3437: }
3438:
3439: if ($checkreferer) {
3440: my $refuri=$env{'httpref.'.$orguri};
3441: unless ($refuri) {
3442: foreach (keys %env) {
3443: if ($_=~/^httpref\..*\*/) {
3444: my $pattern=$_;
3445: $pattern=~s/^httpref\.\/res\///;
3446: $pattern=~s/\*/\[\^\/\]\+/g;
3447: $pattern=~s/\//\\\//g;
3448: if ($orguri=~/$pattern/) {
3449: $refuri=$env{$_};
3450: }
3451: }
3452: }
3453: }
3454:
3455: if ($refuri) {
3456: $refuri=&declutter($refuri);
3457: my ($match,$cond)=&is_on_map($refuri);
3458: if ($match) {
3459: my $refstatecond=$cond;
3460: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3461: =~/\Q$priv\E\&([^\:]*)/) {
3462: $thisallowed.=$1;
3463: $uri=$refuri;
3464: $statecond=$refstatecond;
3465: }
3466: }
3467: }
3468: }
3469: }
3470:
3471: #
3472: # Gathered now: all privileges that could apply, and condition number
3473: #
3474: #
3475: # Full or no access?
3476: #
3477:
3478: if ($thisallowed=~/F/) {
3479: return 'F';
3480: }
3481:
3482: unless ($thisallowed) {
3483: return '';
3484: }
3485:
3486: # Restrictions exist, deal with them
3487: #
3488: # C:according to course preferences
3489: # R:according to resource settings
3490: # L:unless locked
3491: # X:according to user session state
3492: #
3493:
3494: # Possibly locked functionality, check all courses
3495: # Locks might take effect only after 10 minutes cache expiration for other
3496: # courses, and 2 minutes for current course
3497:
3498: my $envkey;
3499: if ($thisallowed=~/L/) {
3500: foreach $envkey (keys %env) {
3501: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3502: my $courseid=$2;
3503: my $roleid=$1.'.'.$2;
3504: $courseid=~s/^\///;
3505: my $expiretime=600;
3506: if ($env{'request.role'} eq $roleid) {
3507: $expiretime=120;
3508: }
3509: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3510: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3511: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3512: &coursedescription($courseid,{'freshen_cache' => 1});
3513: }
3514: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3515: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3516: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3517: &log($env{'user.domain'},$env{'user.name'},
3518: $env{'user.home'},
3519: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3520: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3521: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3522: return '';
3523: }
3524: }
3525: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3526: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3527: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3528: &log($env{'user.domain'},$env{'user.name'},
3529: $env{'user.home'},
3530: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3531: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3532: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3533: return '';
3534: }
3535: }
3536: }
3537: }
3538: }
3539:
3540: #
3541: # Rest of the restrictions depend on selected course
3542: #
3543:
3544: unless ($env{'request.course.id'}) {
3545: return '1';
3546: }
3547:
3548: #
3549: # Now user is definitely in a course
3550: #
3551:
3552:
3553: # Course preferences
3554:
3555: if ($thisallowed=~/C/) {
3556: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3557: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
3558: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
3559: =~/\Q$rolecode\E/) {
3560: if ($priv ne 'pch') {
3561: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3562: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3563: $env{'request.course.id'});
3564: }
3565: return '';
3566: }
3567:
3568: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
3569: =~/\Q$unamedom\E/) {
3570: if ($priv ne 'pch') {
3571: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
3572: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3573: $env{'request.course.id'});
3574: }
3575: return '';
3576: }
3577: }
3578:
3579: # Resource preferences
3580:
3581: if ($thisallowed=~/R/) {
3582: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3583: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3584: if ($priv ne 'pch') {
3585: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3586: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3587: }
3588: return '';
3589: }
3590: }
3591:
3592: # Restricted by state or randomout?
3593:
3594: if ($thisallowed=~/X/) {
3595: if ($env{'acc.randomout'}) {
3596: if (!$symb) { $symb=&symbread($uri,1); }
3597: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3598: return '';
3599: }
3600: }
3601: if (&condval($statecond)) {
3602: return '2';
3603: } else {
3604: return '';
3605: }
3606: }
3607:
3608: return 'F';
3609: }
3610:
3611: sub split_uri_for_cond {
3612: my $uri=&deversion(&declutter(shift));
3613: my @uriparts=split(/\//,$uri);
3614: my $filename=pop(@uriparts);
3615: my $pathname=join('/',@uriparts);
3616: return ($pathname,$filename);
3617: }
3618: # --------------------------------------------------- Is a resource on the map?
3619:
3620: sub is_on_map {
3621: my ($pathname,$filename) = &split_uri_for_cond(shift);
3622: #Trying to find the conditional for the file
3623: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3624: /\&\Q$filename\E\:([\d\|]+)\&/);
3625: if ($match) {
3626: return (1,$1);
3627: } else {
3628: return (0,0);
3629: }
3630: }
3631:
3632: # --------------------------------------------------------- Get symb from alias
3633:
3634: sub get_symb_from_alias {
3635: my $symb=shift;
3636: my ($map,$resid,$url)=&decode_symb($symb);
3637: # Already is a symb
3638: if ($url) { return $symb; }
3639: # Must be an alias
3640: my $aliassymb='';
3641: my %bighash;
3642: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3643: &GDBM_READER(),0640)) {
3644: my $rid=$bighash{'mapalias_'.$symb};
3645: if ($rid) {
3646: my ($mapid,$resid)=split(/\./,$rid);
3647: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3648: $resid,$bighash{'src_'.$rid});
3649: }
3650: untie %bighash;
3651: }
3652: return $aliassymb;
3653: }
3654:
3655: # ----------------------------------------------------------------- Define Role
3656:
3657: sub definerole {
3658: if (allowed('mcr','/')) {
3659: my ($rolename,$sysrole,$domrole,$courole)=@_;
3660: foreach (split(':',$sysrole)) {
3661: my ($crole,$cqual)=split(/\&/,$_);
3662: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3663: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3664: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3665: return "refused:s:$crole&$cqual";
3666: }
3667: }
3668: }
3669: foreach (split(':',$domrole)) {
3670: my ($crole,$cqual)=split(/\&/,$_);
3671: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3672: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3673: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3674: return "refused:d:$crole&$cqual";
3675: }
3676: }
3677: }
3678: foreach (split(':',$courole)) {
3679: my ($crole,$cqual)=split(/\&/,$_);
3680: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3681: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3682: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3683: return "refused:c:$crole&$cqual";
3684: }
3685: }
3686: }
3687: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3688: "$env{'user.domain'}:$env{'user.name'}:".
3689: "rolesdef_$rolename=".
3690: escape($sysrole.'_'.$domrole.'_'.$courole);
3691: return reply($command,$env{'user.home'});
3692: } else {
3693: return 'refused';
3694: }
3695: }
3696:
3697: # ---------------- Make a metadata query against the network of library servers
3698:
3699: sub metadata_query {
3700: my ($query,$custom,$customshow,$server_array)=@_;
3701: my %rhash;
3702: my @server_list = (defined($server_array) ? @$server_array
3703: : keys(%libserv) );
3704: for my $server (@server_list) {
3705: unless ($custom or $customshow) {
3706: my $reply=&reply("querysend:".&escape($query),$server);
3707: $rhash{$server}=$reply;
3708: }
3709: else {
3710: my $reply=&reply("querysend:".&escape($query).':'.
3711: &escape($custom).':'.&escape($customshow),
3712: $server);
3713: $rhash{$server}=$reply;
3714: }
3715: }
3716: return \%rhash;
3717: }
3718:
3719: # ----------------------------------------- Send log queries and wait for reply
3720:
3721: sub log_query {
3722: my ($uname,$udom,$query,%filters)=@_;
3723: my $uhome=&homeserver($uname,$udom);
3724: if ($uhome eq 'no_host') { return 'error: no_host'; }
3725: my $uhost=$hostname{$uhome};
3726: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3727: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3728: $uhome);
3729: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3730: return get_query_reply($queryid);
3731: }
3732:
3733: # ------- Request retrieval of institutional classlists for course(s)
3734:
3735: sub fetch_enrollment_query {
3736: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3737: my $homeserver;
3738: my $maxtries = 1;
3739: if ($context eq 'automated') {
3740: $homeserver = $perlvar{'lonHostID'};
3741: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3742: } else {
3743: $homeserver = &homeserver($cnum,$dom);
3744: }
3745: my $host=$hostname{$homeserver};
3746: my $cmd = '';
3747: foreach (keys %{$affiliatesref}) {
3748: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3749: }
3750: $cmd =~ s/%%$//;
3751: $cmd = &escape($cmd);
3752: my $query = 'fetchenrollment';
3753: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3754: unless ($queryid=~/^\Q$host\E\_/) {
3755: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3756: return 'error: '.$queryid;
3757: }
3758: my $reply = &get_query_reply($queryid);
3759: my $tries = 1;
3760: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3761: $reply = &get_query_reply($queryid);
3762: $tries ++;
3763: }
3764: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3765: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3766: } else {
3767: my @responses = split/:/,$reply;
3768: if ($homeserver eq $perlvar{'lonHostID'}) {
3769: foreach (@responses) {
3770: my ($key,$value) = split/=/,$_;
3771: $$replyref{$key} = $value;
3772: }
3773: } else {
3774: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3775: foreach (@responses) {
3776: my ($key,$value) = split/=/,$_;
3777: $$replyref{$key} = $value;
3778: if ($value > 0) {
3779: foreach (@{$$affiliatesref{$key}}) {
3780: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3781: my $destname = $pathname.'/'.$filename;
3782: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3783: if ($xml_classlist =~ /^error/) {
3784: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3785: } else {
3786: if ( open(FILE,">$destname") ) {
3787: print FILE &unescape($xml_classlist);
3788: close(FILE);
3789: } else {
3790: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3791: }
3792: }
3793: }
3794: }
3795: }
3796: }
3797: return 'ok';
3798: }
3799: return 'error';
3800: }
3801:
3802: sub get_query_reply {
3803: my $queryid=shift;
3804: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3805: my $reply='';
3806: for (1..100) {
3807: sleep 2;
3808: if (-e $replyfile.'.end') {
3809: if (open(my $fh,$replyfile)) {
3810: $reply.=<$fh>;
3811: close($fh);
3812: } else { return 'error: reply_file_error'; }
3813: return &unescape($reply);
3814: }
3815: }
3816: return 'timeout:'.$queryid;
3817: }
3818:
3819: sub courselog_query {
3820: #
3821: # possible filters:
3822: # url: url or symb
3823: # username
3824: # domain
3825: # action: view, submit, grade
3826: # start: timestamp
3827: # end: timestamp
3828: #
3829: my (%filters)=@_;
3830: unless ($env{'request.course.id'}) { return 'no_course'; }
3831: if ($filters{'url'}) {
3832: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3833: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3834: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3835: }
3836: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
3837: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
3838: return &log_query($cname,$cdom,'courselog',%filters);
3839: }
3840:
3841: sub userlog_query {
3842: my ($uname,$udom,%filters)=@_;
3843: return &log_query($uname,$udom,'userlog',%filters);
3844: }
3845:
3846: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3847:
3848: sub auto_run {
3849: my ($cnum,$cdom) = @_;
3850: my $homeserver = &homeserver($cnum,$cdom);
3851: my $response = &reply('autorun:'.$cdom,$homeserver);
3852: return $response;
3853: }
3854:
3855: sub auto_get_sections {
3856: my ($cnum,$cdom,$inst_coursecode) = @_;
3857: my $homeserver = &homeserver($cnum,$cdom);
3858: my @secs = ();
3859: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3860: unless ($response eq 'refused') {
3861: @secs = split/:/,$response;
3862: }
3863: return @secs;
3864: }
3865:
3866: sub auto_new_course {
3867: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3868: my $homeserver = &homeserver($cnum,$cdom);
3869: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3870: return $response;
3871: }
3872:
3873: sub auto_validate_courseID {
3874: my ($cnum,$cdom,$inst_course_id) = @_;
3875: my $homeserver = &homeserver($cnum,$cdom);
3876: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3877: return $response;
3878: }
3879:
3880: sub auto_create_password {
3881: my ($cnum,$cdom,$authparam) = @_;
3882: my $homeserver = &homeserver($cnum,$cdom);
3883: my $create_passwd = 0;
3884: my $authchk = '';
3885: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3886: if ($response eq 'refused') {
3887: $authchk = 'refused';
3888: } else {
3889: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3890: }
3891: return ($authparam,$create_passwd,$authchk);
3892: }
3893:
3894: sub auto_photo_permission {
3895: my ($cnum,$cdom,$students) = @_;
3896: my $homeserver = &homeserver($cnum,$cdom);
3897: my ($outcome,$perm_reqd,$conditions) =
3898: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
3899: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3900: return (undef,undef);
3901: }
3902: return ($outcome,$perm_reqd,$conditions);
3903: }
3904:
3905: sub auto_checkphotos {
3906: my ($uname,$udom,$pid) = @_;
3907: my $homeserver = &homeserver($uname,$udom);
3908: my ($result,$resulttype);
3909: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
3910: &escape($uname).':'.&escape($pid),
3911: $homeserver));
3912: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3913: return (undef,undef);
3914: }
3915: if ($outcome) {
3916: ($result,$resulttype) = split(/:/,$outcome);
3917: }
3918: return ($result,$resulttype);
3919: }
3920:
3921: sub auto_photochoice {
3922: my ($cnum,$cdom) = @_;
3923: my $homeserver = &homeserver($cnum,$cdom);
3924: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
3925: &escape($cdom),
3926: $homeserver)));
3927: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3928: return (undef,undef);
3929: }
3930: return ($update,$comment);
3931: }
3932:
3933: sub auto_photoupdate {
3934: my ($affiliatesref,$dom,$cnum,$photo) = @_;
3935: my $homeserver = &homeserver($cnum,$dom);
3936: my $host=$hostname{$homeserver};
3937: my $cmd = '';
3938: my $maxtries = 1;
3939: foreach (keys %{$affiliatesref}) {
3940: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3941: }
3942: $cmd =~ s/%%$//;
3943: $cmd = &escape($cmd);
3944: my $query = 'institutionalphotos';
3945: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
3946: unless ($queryid=~/^\Q$host\E\_/) {
3947: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
3948: return 'error: '.$queryid;
3949: }
3950: my $reply = &get_query_reply($queryid);
3951: my $tries = 1;
3952: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3953: $reply = &get_query_reply($queryid);
3954: $tries ++;
3955: }
3956: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3957: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3958: } else {
3959: my @responses = split(/:/,$reply);
3960: my $outcome = shift(@responses);
3961: foreach my $item (@responses) {
3962: my ($key,$value) = split(/=/,$item);
3963: $$photo{$key} = $value;
3964: }
3965: return $outcome;
3966: }
3967: return 'error';
3968: }
3969:
3970: sub auto_instcode_format {
3971: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3972: my $courses = '';
3973: my $homeserver;
3974: if ($caller eq 'global') {
3975: foreach my $tryserver (keys %libserv) {
3976: if ($hostdom{$tryserver} eq $codedom) {
3977: $homeserver = $tryserver;
3978: last;
3979: }
3980: }
3981: if (($env{'user.name'}) && ($env{'user.domain'} eq $codedom)) {
3982: $homeserver = &homeserver($env{'user.name'},$codedom);
3983: }
3984: } else {
3985: $homeserver = &homeserver($caller,$codedom);
3986: }
3987: foreach (keys %{$instcodes}) {
3988: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3989: }
3990: chop($courses);
3991: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3992: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3993: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3994: %{$codes} = &str2hash($codes_str);
3995: @{$codetitles} = &str2array($codetitles_str);
3996: %{$cat_titles} = &str2hash($cat_titles_str);
3997: %{$cat_order} = &str2hash($cat_order_str);
3998: return 'ok';
3999: }
4000: return $response;
4001: }
4002:
4003: # ------------------------------------------------------- Course Group routines
4004:
4005: sub get_coursegroups {
4006: my ($cdom,$cnum,$group) = @_;
4007: return(&dump('coursegroups',$cdom,$cnum,$group));
4008: }
4009:
4010: sub modify_coursegroup {
4011: my ($cdom,$cnum,$groupsettings) = @_;
4012: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
4013: }
4014:
4015: sub modify_group_roles {
4016: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
4017: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
4018: my $role = 'gr/'.&escape($userprivs);
4019: my ($uname,$udom) = split(/:/,$user);
4020: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
4021: if ($result eq 'ok') {
4022: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
4023: }
4024: return $result;
4025: }
4026:
4027: sub modify_coursegroup_membership {
4028: my ($cdom,$cnum,$membership) = @_;
4029: my $result = &put('groupmembership',$membership,$cdom,$cnum);
4030: return $result;
4031: }
4032:
4033: sub get_active_groups {
4034: my ($udom,$uname,$cdom,$cnum) = @_;
4035: my $now = time;
4036: my %groups = ();
4037: foreach my $key (keys(%env)) {
4038: if ($key =~ m-user\.role\.gr\./([^/]+)/([^/]+)/(\w+)$-) {
4039: my ($start,$end) = split(/\./,$env{$key});
4040: if (($end!=0) && ($end<$now)) { next; }
4041: if (($start!=0) && ($start>$now)) { next; }
4042: if ($1 eq $cdom && $2 eq $cnum) {
4043: $groups{$3} = $env{$key} ;
4044: }
4045: }
4046: }
4047: return %groups;
4048: }
4049:
4050: sub get_group_membership {
4051: my ($cdom,$cnum,$group) = @_;
4052: return(&dump('groupmembership',$cdom,$cnum,$group));
4053: }
4054:
4055: sub get_users_groups {
4056: my ($udom,$uname,$courseid) = @_;
4057: my @usersgroups;
4058: my $cachetime=1800;
4059: $courseid=~s/\_/\//g;
4060: $courseid=~s/^(\w)/\/$1/;
4061:
4062: my $hashid="$udom:$uname:$courseid";
4063: my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
4064: if (defined($cached)) {
4065: @usersgroups = split(/:/,$grouplist);
4066: } else {
4067: $grouplist = '';
4068: my %roleshash = &dump('roles',$udom,$uname,$courseid);
4069: my ($tmp) = keys(%roleshash);
4070: if ($tmp=~/^error:/) {
4071: &logthis('Error retrieving roles: '.$tmp.' for '.$uname.':'.$udom);
4072: } else {
4073: my $access_end = $env{'course.'.$courseid.
4074: '.default_enrollment_end_date'};
4075: my $now = time;
4076: foreach my $key (keys(%roleshash)) {
4077: if ($key =~ /^\Q$courseid\E\/(\w+)\_gr$/) {
4078: my $group = $1;
4079: if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
4080: my $start = $2;
4081: my $end = $1;
4082: if ($start == -1) { next; } # deleted from group
4083: if (($start!=0) && ($start>$now)) { next; }
4084: if (($end!=0) && ($end<$now)) {
4085: if ($access_end && $access_end < $now) {
4086: if ($access_end - $end < 86400) {
4087: push(@usersgroups,$group);
4088: }
4089: }
4090: next;
4091: }
4092: push(@usersgroups,$group);
4093: }
4094: }
4095: }
4096: @usersgroups = &sort_course_groups($courseid,@usersgroups);
4097: $grouplist = join(':',@usersgroups);
4098: &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
4099: }
4100: }
4101: return @usersgroups;
4102: }
4103:
4104: sub devalidate_getgroups_cache {
4105: my ($udom,$uname,$cdom,$cnum)=@_;
4106: my $courseid = $cdom.'_'.$cnum;
4107: $courseid=~s/\_/\//g;
4108: $courseid=~s/^(\w)/\/$1/;
4109: my $hashid="$udom:$uname:$courseid";
4110: &devalidate_cache_new('getgroups',$hashid);
4111: }
4112:
4113: # ------------------------------------------------------------------ Plain Text
4114:
4115: sub plaintext {
4116: my ($short,$type,$cid) = @_;
4117: if (!defined($cid)) {
4118: $cid = $env{'request.course.id'};
4119: }
4120: if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
4121: return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
4122: '.plaintext'});
4123: }
4124: my %rolenames = (
4125: Course => 'std',
4126: Group => 'alt1',
4127: );
4128: if (defined($type) &&
4129: defined($rolenames{$type}) &&
4130: defined($prp{$short}{$rolenames{$type}})) {
4131: return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
4132: } else {
4133: return &Apache::lonlocal::mt($prp{$short}{'std'});
4134: }
4135: }
4136:
4137: # ----------------------------------------------------------------- Assign Role
4138:
4139: sub assignrole {
4140: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
4141: my $mrole;
4142: if ($role =~ /^cr\//) {
4143: my $cwosec=$url;
4144: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4145: unless (&allowed('ccr',$cwosec)) {
4146: &logthis('Refused custom assignrole: '.
4147: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4148: $env{'user.name'}.' at '.$env{'user.domain'});
4149: return 'refused';
4150: }
4151: $mrole='cr';
4152: } elsif ($role =~ /^gr\//) {
4153: my $cwogrp=$url;
4154: $cwogrp=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4155: unless (&allowed('mdg',$cwogrp)) {
4156: &logthis('Refused group assignrole: '.
4157: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4158: $env{'user.name'}.' at '.$env{'user.domain'});
4159: return 'refused';
4160: }
4161: $mrole='gr';
4162: } else {
4163: my $cwosec=$url;
4164: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4165: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
4166: &logthis('Refused assignrole: '.
4167: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4168: $env{'user.name'}.' at '.$env{'user.domain'});
4169: return 'refused';
4170: }
4171: $mrole=$role;
4172: }
4173: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4174: "$udom:$uname:$url".'_'."$mrole=$role";
4175: if ($end) { $command.='_'.$end; }
4176: if ($start) {
4177: if ($end) {
4178: $command.='_'.$start;
4179: } else {
4180: $command.='_0_'.$start;
4181: }
4182: }
4183: my $origstart = $start;
4184: my $origend = $end;
4185: # actually delete
4186: if ($deleteflag) {
4187: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
4188: # modify command to delete the role
4189: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
4190: "$udom:$uname:$url".'_'."$mrole";
4191: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
4192: # set start and finish to negative values for userrolelog
4193: $start=-1;
4194: $end=-1;
4195: }
4196: }
4197: # send command
4198: my $answer=&reply($command,&homeserver($uname,$udom));
4199: # log new user role if status is ok
4200: if ($answer eq 'ok') {
4201: &userrolelog($role,$uname,$udom,$url,$start,$end);
4202: # for course roles, perform group memberships changes triggered by role change.
4203: unless ($role =~ /^gr/) {
4204: &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
4205: $origstart);
4206: }
4207: }
4208: return $answer;
4209: }
4210:
4211: # -------------------------------------------------- Modify user authentication
4212: # Overrides without validation
4213:
4214: sub modifyuserauth {
4215: my ($udom,$uname,$umode,$upass)=@_;
4216: my $uhome=&homeserver($uname,$udom);
4217: unless (&allowed('mau',$udom)) { return 'refused'; }
4218: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
4219: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4220: ' in domain '.$env{'request.role.domain'});
4221: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
4222: &escape($upass),$uhome);
4223: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
4224: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
4225: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4226: &log($udom,,$uname,$uhome,
4227: 'Authentication changed by '.$env{'user.domain'}.', '.
4228: $env{'user.name'}.', '.$umode.
4229: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4230: unless ($reply eq 'ok') {
4231: &logthis('Authentication mode error: '.$reply);
4232: return 'error: '.$reply;
4233: }
4234: return 'ok';
4235: }
4236:
4237: # --------------------------------------------------------------- Modify a user
4238:
4239: sub modifyuser {
4240: my ($udom, $uname, $uid,
4241: $umode, $upass, $first,
4242: $middle, $last, $gene,
4243: $forceid, $desiredhome, $email)=@_;
4244: $udom=~s/\W//g;
4245: $uname=~s/\W//g;
4246: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
4247: $umode.', '.$first.', '.$middle.', '.
4248: $last.', '.$gene.'(forceid: '.$forceid.')'.
4249: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
4250: ' desiredhome not specified').
4251: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4252: ' in domain '.$env{'request.role.domain'});
4253: my $uhome=&homeserver($uname,$udom,'true');
4254: # ----------------------------------------------------------------- Create User
4255: if (($uhome eq 'no_host') &&
4256: (($umode && $upass) || ($umode eq 'localauth'))) {
4257: my $unhome='';
4258: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
4259: $unhome = $desiredhome;
4260: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
4261: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
4262: } else { # load balancing routine for determining $unhome
4263: my $tryserver;
4264: my $loadm=10000000;
4265: foreach $tryserver (keys %libserv) {
4266: if ($hostdom{$tryserver} eq $udom) {
4267: my $answer=reply('load',$tryserver);
4268: if (($answer=~/\d+/) && ($answer<$loadm)) {
4269: $loadm=$answer;
4270: $unhome=$tryserver;
4271: }
4272: }
4273: }
4274: }
4275: if (($unhome eq '') || ($unhome eq 'no_host')) {
4276: return 'error: unable to find a home server for '.$uname.
4277: ' in domain '.$udom;
4278: }
4279: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
4280: &escape($upass),$unhome);
4281: unless ($reply eq 'ok') {
4282: return 'error: '.$reply;
4283: }
4284: $uhome=&homeserver($uname,$udom,'true');
4285: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
4286: return 'error: unable verify users home machine.';
4287: }
4288: } # End of creation of new user
4289: # ---------------------------------------------------------------------- Add ID
4290: if ($uid) {
4291: $uid=~tr/A-Z/a-z/;
4292: my %uidhash=&idrget($udom,$uname);
4293: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
4294: && (!$forceid)) {
4295: unless ($uid eq $uidhash{$uname}) {
4296: return 'error: user id "'.$uid.'" does not match '.
4297: 'current user id "'.$uidhash{$uname}.'".';
4298: }
4299: } else {
4300: &idput($udom,($uname => $uid));
4301: }
4302: }
4303: # -------------------------------------------------------------- Add names, etc
4304: my @tmp=&get('environment',
4305: ['firstname','middlename','lastname','generation'],
4306: $udom,$uname);
4307: my %names;
4308: if ($tmp[0] =~ m/^error:.*/) {
4309: %names=();
4310: } else {
4311: %names = @tmp;
4312: }
4313: #
4314: # Make sure to not trash student environment if instructor does not bother
4315: # to supply name and email information
4316: #
4317: if ($first) { $names{'firstname'} = $first; }
4318: if (defined($middle)) { $names{'middlename'} = $middle; }
4319: if ($last) { $names{'lastname'} = $last; }
4320: if (defined($gene)) { $names{'generation'} = $gene; }
4321: if ($email) {
4322: $email=~s/[^\w\@\.\-\,]//gs;
4323: if ($email=~/\@/) { $names{'notification'} = $email;
4324: $names{'critnotification'} = $email;
4325: $names{'permanentemail'} = $email; }
4326: }
4327: my $reply = &put('environment', \%names, $udom,$uname);
4328: if ($reply ne 'ok') { return 'error: '.$reply; }
4329: &devalidate_cache_new('namescache',$uname.':'.$udom);
4330: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4331: $umode.', '.$first.', '.$middle.', '.
4332: $last.', '.$gene.' by '.
4333: $env{'user.name'}.' at '.$env{'user.domain'});
4334: return 'ok';
4335: }
4336:
4337: # -------------------------------------------------------------- Modify student
4338:
4339: sub modifystudent {
4340: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4341: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4342: if (!$cid) {
4343: unless ($cid=$env{'request.course.id'}) {
4344: return 'not_in_class';
4345: }
4346: }
4347: # --------------------------------------------------------------- Make the user
4348: my $reply=&modifyuser
4349: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4350: $desiredhome,$email);
4351: unless ($reply eq 'ok') { return $reply; }
4352: # This will cause &modify_student_enrollment to get the uid from the
4353: # students environment
4354: $uid = undef if (!$forceid);
4355: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4356: $gene,$usec,$end,$start,$type,$locktype,$cid);
4357: return $reply;
4358: }
4359:
4360: sub modify_student_enrollment {
4361: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4362: my ($cdom,$cnum,$chome);
4363: if (!$cid) {
4364: unless ($cid=$env{'request.course.id'}) {
4365: return 'not_in_class';
4366: }
4367: $cdom=$env{'course.'.$cid.'.domain'};
4368: $cnum=$env{'course.'.$cid.'.num'};
4369: } else {
4370: ($cdom,$cnum)=split(/_/,$cid);
4371: }
4372: $chome=$env{'course.'.$cid.'.home'};
4373: if (!$chome) {
4374: $chome=&homeserver($cnum,$cdom);
4375: }
4376: if (!$chome) { return 'unknown_course'; }
4377: # Make sure the user exists
4378: my $uhome=&homeserver($uname,$udom);
4379: if (($uhome eq '') || ($uhome eq 'no_host')) {
4380: return 'error: no such user';
4381: }
4382: # Get student data if we were not given enough information
4383: if (!defined($first) || $first eq '' ||
4384: !defined($last) || $last eq '' ||
4385: !defined($uid) || $uid eq '' ||
4386: !defined($middle) || $middle eq '' ||
4387: !defined($gene) || $gene eq '') {
4388: # They did not supply us with enough data to enroll the student, so
4389: # we need to pick up more information.
4390: my %tmp = &get('environment',
4391: ['firstname','middlename','lastname', 'generation','id']
4392: ,$udom,$uname);
4393:
4394: #foreach (keys(%tmp)) {
4395: # &logthis("key $_ = ".$tmp{$_});
4396: #}
4397: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4398: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4399: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4400: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4401: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4402: }
4403: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4404: my $reply=cput('classlist',
4405: {"$uname:$udom" =>
4406: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4407: $cdom,$cnum);
4408: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4409: return 'error: '.$reply;
4410: } else {
4411: &devalidate_getsection_cache($udom,$uname,$cid);
4412: }
4413: # Add student role to user
4414: my $uurl='/'.$cid;
4415: $uurl=~s/\_/\//g;
4416: if ($usec) {
4417: $uurl.='/'.$usec;
4418: }
4419: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4420: }
4421:
4422: sub format_name {
4423: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4424: my $name;
4425: if ($first ne 'lastname') {
4426: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4427: } else {
4428: if ($lastname=~/\S/) {
4429: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4430: $name=~s/\s+,/,/;
4431: } else {
4432: $name.= $firstname.' '.$middlename.' '.$generation;
4433: }
4434: }
4435: $name=~s/^\s+//;
4436: $name=~s/\s+$//;
4437: $name=~s/\s+/ /g;
4438: return $name;
4439: }
4440:
4441: # ------------------------------------------------- Write to course preferences
4442:
4443: sub writecoursepref {
4444: my ($courseid,%prefs)=@_;
4445: $courseid=~s/^\///;
4446: $courseid=~s/\_/\//g;
4447: my ($cdomain,$cnum)=split(/\//,$courseid);
4448: my $chome=homeserver($cnum,$cdomain);
4449: if (($chome eq '') || ($chome eq 'no_host')) {
4450: return 'error: no such course';
4451: }
4452: my $cstring='';
4453: foreach (keys %prefs) {
4454: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
4455: }
4456: $cstring=~s/\&$//;
4457: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
4458: }
4459:
4460: # ---------------------------------------------------------- Make/modify course
4461:
4462: sub createcourse {
4463: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
4464: $course_owner,$crstype)=@_;
4465: $url=&declutter($url);
4466: my $cid='';
4467: unless (&allowed('ccc',$udom)) {
4468: return 'refused';
4469: }
4470: # ------------------------------------------------------------------- Create ID
4471: my $uname=int(1+rand(9)).
4472: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
4473: substr($$.time,0,5).unpack("H8",pack("I32",time)).
4474: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4475: # ----------------------------------------------- Make sure that does not exist
4476: my $uhome=&homeserver($uname,$udom,'true');
4477: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4478: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
4479: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4480: $uhome=&homeserver($uname,$udom,'true');
4481: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4482: return 'error: unable to generate unique course-ID';
4483: }
4484: }
4485: # ------------------------------------------------ Check supplied server name
4486: $course_server = $env{'user.homeserver'} if (! defined($course_server));
4487: if (! exists($libserv{$course_server})) {
4488: return 'error:bad server name '.$course_server;
4489: }
4490: # ------------------------------------------------------------- Make the course
4491: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
4492: $course_server);
4493: unless ($reply eq 'ok') { return 'error: '.$reply; }
4494: $uhome=&homeserver($uname,$udom,'true');
4495: if (($uhome eq '') || ($uhome eq 'no_host')) {
4496: return 'error: no such course';
4497: }
4498: # ----------------------------------------------------------------- Course made
4499: # log existence
4500: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
4501: ':'.&escape($inst_code).':'.&escape($course_owner).':'.
4502: &escape($crstype),$uhome);
4503: &flushcourselogs();
4504: # set toplevel url
4505: my $topurl=$url;
4506: unless ($nonstandard) {
4507: # ------------------------------------------ For standard courses, make top url
4508: my $mapurl=&clutter($url);
4509: if ($mapurl eq '/res/') { $mapurl=''; }
4510: $env{'form.initmap'}=(<<ENDINITMAP);
4511: <map>
4512: <resource id="1" type="start"></resource>
4513: <resource id="2" src="$mapurl"></resource>
4514: <resource id="3" type="finish"></resource>
4515: <link index="1" from="1" to="2"></link>
4516: <link index="2" from="2" to="3"></link>
4517: </map>
4518: ENDINITMAP
4519: $topurl=&declutter(
4520: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
4521: );
4522: }
4523: # ----------------------------------------------------------- Write preferences
4524: &writecoursepref($udom.'_'.$uname,
4525: ('description' => $description,
4526: 'url' => $topurl));
4527: return '/'.$udom.'/'.$uname;
4528: }
4529:
4530: # ---------------------------------------------------------- Assign Custom Role
4531:
4532: sub assigncustomrole {
4533: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
4534: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
4535: $end,$start,$deleteflag);
4536: }
4537:
4538: # ----------------------------------------------------------------- Revoke Role
4539:
4540: sub revokerole {
4541: my ($udom,$uname,$url,$role,$deleteflag)=@_;
4542: my $now=time;
4543: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
4544: }
4545:
4546: # ---------------------------------------------------------- Revoke Custom Role
4547:
4548: sub revokecustomrole {
4549: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
4550: my $now=time;
4551: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
4552: $deleteflag);
4553: }
4554:
4555: # ------------------------------------------------------------ Disk usage
4556: sub diskusage {
4557: my ($udom,$uname,$directoryRoot)=@_;
4558: $directoryRoot =~ s/\/$//;
4559: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
4560: return $listing;
4561: }
4562:
4563: sub is_locked {
4564: my ($file_name, $domain, $user) = @_;
4565: my @check;
4566: my $is_locked;
4567: push @check, $file_name;
4568: my %locked = &get('file_permissions',\@check,
4569: $env{'user.domain'},$env{'user.name'});
4570: my ($tmp)=keys(%locked);
4571: if ($tmp=~/^error:/) { undef(%locked); }
4572:
4573: if (ref($locked{$file_name}) eq 'ARRAY') {
4574: $is_locked = 'false';
4575: foreach my $entry (@{$locked{$file_name}}) {
4576: if (ref($entry) eq 'ARRAY') {
4577: $is_locked = 'true';
4578: last;
4579: }
4580: }
4581: } else {
4582: $is_locked = 'false';
4583: }
4584: }
4585:
4586: # ------------------------------------------------------------- Mark as Read Only
4587:
4588: sub mark_as_readonly {
4589: my ($domain,$user,$files,$what) = @_;
4590: my %current_permissions = &dump('file_permissions',$domain,$user);
4591: my ($tmp)=keys(%current_permissions);
4592: if ($tmp=~/^error:/) { undef(%current_permissions); }
4593: foreach my $file (@{$files}) {
4594: push(@{$current_permissions{$file}},$what);
4595: }
4596: &put('file_permissions',\%current_permissions,$domain,$user);
4597: return;
4598: }
4599:
4600: # ------------------------------------------------------------Save Selected Files
4601:
4602: sub save_selected_files {
4603: my ($user, $path, @files) = @_;
4604: my $filename = $user."savedfiles";
4605: my @other_files = &files_not_in_path($user, $path);
4606: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4607: foreach my $file (@files) {
4608: print (OUT $env{'form.currentpath'}.$file."\n");
4609: }
4610: foreach my $file (@other_files) {
4611: print (OUT $file."\n");
4612: }
4613: close (OUT);
4614: return 'ok';
4615: }
4616:
4617: sub clear_selected_files {
4618: my ($user) = @_;
4619: my $filename = $user."savedfiles";
4620: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4621: print (OUT undef);
4622: close (OUT);
4623: return ("ok");
4624: }
4625:
4626: sub files_in_path {
4627: my ($user, $path) = @_;
4628: my $filename = $user."savedfiles";
4629: my %return_files;
4630: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4631: while (my $line_in = <IN>) {
4632: chomp ($line_in);
4633: my @paths_and_file = split (m!/!, $line_in);
4634: my $file_part = pop (@paths_and_file);
4635: my $path_part = join ('/', @paths_and_file);
4636: $path_part.='/';
4637: my $path_and_file = $path_part.$file_part;
4638: if ($path_part eq $path) {
4639: $return_files{$file_part}= 'selected';
4640: }
4641: }
4642: close (IN);
4643: return (\%return_files);
4644: }
4645:
4646: # called in portfolio select mode, to show files selected NOT in current directory
4647: sub files_not_in_path {
4648: my ($user, $path) = @_;
4649: my $filename = $user."savedfiles";
4650: my @return_files;
4651: my $path_part;
4652: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4653: while (<IN>) {
4654: #ok, I know it's clunky, but I want it to work
4655: my @paths_and_file = split m!/!, $_;
4656: my $file_part = pop (@paths_and_file);
4657: chomp ($file_part);
4658: my $path_part = join ('/', @paths_and_file);
4659: $path_part .= '/';
4660: my $path_and_file = $path_part.$file_part;
4661: if ($path_part ne $path) {
4662: push (@return_files, ($path_and_file));
4663: }
4664: }
4665: close (OUT);
4666: return (@return_files);
4667: }
4668:
4669: #----------------------------------------------Get portfolio file permissions
4670:
4671: sub get_portfile_permissions {
4672: my ($domain,$user) = @_;
4673: my %current_permissions = &dump('file_permissions',$domain,$user);
4674: my ($tmp)=keys(%current_permissions);
4675: if ($tmp=~/^error:/) { undef(%current_permissions); }
4676: return \%current_permissions;
4677: }
4678:
4679: #---------------------------------------------Get portfolio file access controls
4680:
4681: sub get_access_controls {
4682: my ($current_permissions,$group,$file) = @_;
4683: my %access;
4684: if (defined($file)) {
4685: if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
4686: foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
4687: $access{$file}{$control} = $$current_permissions{$file."\0".$control};
4688: }
4689: }
4690: } else {
4691: foreach my $key (keys(%{$current_permissions})) {
4692: if ($key =~ /\0accesscontrol$/) {
4693: if (defined($group)) {
4694: if ($key !~ m-^\Q$group\E/-) {
4695: next;
4696: }
4697: }
4698: my ($fullpath) = split(/\0/,$key);
4699: if (ref($$current_permissions{$key}) eq 'HASH') {
4700: foreach my $control (keys(%{$$current_permissions{$key}})) {
4701: $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
4702: }
4703: }
4704: }
4705: }
4706: }
4707: return %access;
4708: }
4709:
4710: sub parse_access_controls {
4711: my ($access_item) = @_;
4712: my %content;
4713: my $role_id;
4714: my $user;
4715: my $usercount;
4716: my $token;
4717: my $parser=HTML::TokeParser->new(\$access_item);
4718: while ($token=$parser->get_token) {
4719: if ($token->[0] eq 'S') {
4720: my $entry=$token->[1];
4721: if ($entry eq 'scope') {
4722: my $type = $token->[2]{'type'};
4723: if (($type eq 'course') || ($type eq 'group')) {
4724: $content{'roles'} = {};
4725: }
4726: } elsif ($entry eq 'roles') {
4727: $role_id = $token->[2]{id};
4728: $content{$entry}{$role_id} = {
4729: role => [],
4730: access => [],
4731: section => [],
4732: group => [],
4733: };
4734: } elsif ($entry eq 'users') {
4735: $content{'users'} = {};
4736: $usercount = 0;
4737: } elsif ($entry eq 'user') {
4738: $user = '';
4739: } else {
4740: my $value=$parser->get_text('/'.$entry);
4741: if ($entry eq 'uname') {
4742: $user = $value;
4743: } elsif ($entry eq 'udom') {
4744: $user .= ':'.$value;
4745: $content{'users'}{$user} = $usercount;
4746: } elsif ($entry eq 'role' ||
4747: $entry eq 'access' ||
4748: $entry eq 'section' ||
4749: $entry eq 'group') {
4750: if ($role_id ne '') {
4751: push(@{$content{'roles'}{$role_id}{$entry}},$value);
4752: }
4753: } elsif ($entry eq 'dom') {
4754: push(@{$content{$entry}},$value);
4755: } else {
4756: $content{$entry}=$value;
4757: }
4758: }
4759: } elsif ($token->[0] eq 'E') {
4760: if ($token->[1] eq 'user') {
4761: $user = '';
4762: $usercount ++;
4763: } elsif ($token->[1] eq 'roles') {
4764: $role_id = '';
4765: }
4766: }
4767: }
4768: return %content;
4769: }
4770:
4771: sub modify_access_controls {
4772: my ($file_name,$changes,$domain,$user)=@_;
4773: my ($outcome,$deloutcome);
4774: my %store_permissions;
4775: my %new_values;
4776: my %new_control;
4777: my %translation;
4778: my @deletions = ();
4779: my $now = time;
4780: if (exists($$changes{'activate'})) {
4781: if (ref($$changes{'activate'}) eq 'HASH') {
4782: my @newitems = sort(keys(%{$$changes{'activate'}}));
4783: my $numnew = scalar(@newitems);
4784: for (my $i=0; $i<$numnew; $i++) {
4785: my $newkey = $newitems[$i];
4786: my $newid = &Apache::loncommon::get_cgi_id();
4787: $newkey =~ s/^(\d+)/$newid/;
4788: $translation{$1} = $newid;
4789: $new_values{$file_name."\0".$newkey} =
4790: $$changes{'activate'}{$newitems[$i]};
4791: $new_control{$newkey} = $now;
4792: }
4793: }
4794: }
4795: my %todelete;
4796: my %changed_items;
4797: foreach my $action ('delete','update') {
4798: if (exists($$changes{$action})) {
4799: if (ref($$changes{$action}) eq 'HASH') {
4800: foreach my $key (keys(%{$$changes{$action}})) {
4801: my ($itemnum) = ($key =~ /^([^:]+):/);
4802: if ($action eq 'delete') {
4803: $todelete{$itemnum} = 1;
4804: } else {
4805: $changed_items{$itemnum} = $key;
4806: }
4807: }
4808: }
4809: }
4810: }
4811: # get lock on access controls for file.
4812: my $lockhash = {
4813: $file_name."\0".'locked_access_records' => $env{'user.name'}.
4814: ':'.$env{'user.domain'},
4815: };
4816: my $tries = 0;
4817: my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
4818:
4819: while (($gotlock ne 'ok') && $tries <3) {
4820: $tries ++;
4821: sleep 1;
4822: $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
4823: }
4824: if ($gotlock eq 'ok') {
4825: my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
4826: my ($tmp)=keys(%curr_permissions);
4827: if ($tmp=~/^error:/) { undef(%curr_permissions); }
4828: if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
4829: my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
4830: if (ref($curr_controls) eq 'HASH') {
4831: foreach my $control_item (keys(%{$curr_controls})) {
4832: my ($itemnum) = ($control_item =~ /^([^:]+):/);
4833: if (defined($todelete{$itemnum})) {
4834: push(@deletions,$file_name."\0".$control_item);
4835: } else {
4836: if (defined($changed_items{$itemnum})) {
4837: $new_control{$changed_items{$itemnum}} = $now;
4838: push(@deletions,$file_name."\0".$control_item);
4839: $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
4840: } else {
4841: $new_control{$control_item} = $$curr_controls{$control_item};
4842: }
4843: }
4844: }
4845: }
4846: }
4847: $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
4848: $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
4849: $outcome = &put('file_permissions',\%new_values,$domain,$user);
4850: # remove lock
4851: my @del_lock = ($file_name."\0".'locked_access_records');
4852: my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
4853: } else {
4854: $outcome = "error: could not obtain lockfile\n";
4855: }
4856: return ($outcome,$deloutcome,\%new_values,\%translation);
4857: }
4858:
4859: #------------------------------------------------------Get Marked as Read Only
4860:
4861: sub get_marked_as_readonly {
4862: my ($domain,$user,$what,$group) = @_;
4863: my $current_permissions = &get_portfile_permissions($domain,$user);
4864: my @readonly_files;
4865: my $cmp1=$what;
4866: if (ref($what)) { $cmp1=join('',@{$what}) };
4867: while (my ($file_name,$value) = each(%{$current_permissions})) {
4868: if (defined($group)) {
4869: if ($file_name !~ m-^\Q$group\E/-) {
4870: next;
4871: }
4872: }
4873: if (ref($value) eq "ARRAY"){
4874: foreach my $stored_what (@{$value}) {
4875: my $cmp2=$stored_what;
4876: if (ref($stored_what eq 'ARRAY')) {
4877: $cmp2=join('',@{$stored_what});
4878: }
4879: if ($cmp1 eq $cmp2) {
4880: push(@readonly_files, $file_name);
4881: last;
4882: } elsif (!defined($what)) {
4883: push(@readonly_files, $file_name);
4884: last;
4885: }
4886: }
4887: }
4888: }
4889: return @readonly_files;
4890: }
4891: #-----------------------------------------------------------Get Marked as Read Only Hash
4892:
4893: sub get_marked_as_readonly_hash {
4894: my ($current_permissions,$group,$what) = @_;
4895: my %readonly_files;
4896: while (my ($file_name,$value) = each(%{$current_permissions})) {
4897: if (defined($group)) {
4898: if ($file_name !~ m-^\Q$group\E/-) {
4899: next;
4900: }
4901: }
4902: if (ref($value) eq "ARRAY"){
4903: foreach my $stored_what (@{$value}) {
4904: if (ref($stored_what) eq 'ARRAY') {
4905: foreach my $lock_descriptor(@{$stored_what}) {
4906: if ($lock_descriptor eq 'graded') {
4907: $readonly_files{$file_name} = 'graded';
4908: } elsif ($lock_descriptor eq 'handback') {
4909: $readonly_files{$file_name} = 'handback';
4910: } else {
4911: if (!exists($readonly_files{$file_name})) {
4912: $readonly_files{$file_name} = 'locked';
4913: }
4914: }
4915: }
4916: }
4917: }
4918: }
4919: }
4920: return %readonly_files;
4921: }
4922: # ------------------------------------------------------------ Unmark as Read Only
4923:
4924: sub unmark_as_readonly {
4925: # unmarks $file_name (if $file_name is defined), or all files locked by $what
4926: # for portfolio submissions, $what contains [$symb,$crsid]
4927: my ($domain,$user,$what,$file_name,$group) = @_;
4928: my $symb_crs = $what;
4929: if (ref($what)) { $symb_crs=join('',@$what); }
4930: my %current_permissions = &dump('file_permissions',$domain,$user,$group);
4931: my ($tmp)=keys(%current_permissions);
4932: if ($tmp=~/^error:/) { undef(%current_permissions); }
4933: my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
4934: foreach my $file (@readonly_files) {
4935: if (defined($file_name) && ($file_name ne $file)) { next; }
4936: my $current_locks = $current_permissions{$file};
4937: my @new_locks;
4938: my @del_keys;
4939: if (ref($current_locks) eq "ARRAY"){
4940: foreach my $locker (@{$current_locks}) {
4941: my $compare=$locker;
4942: if (ref($locker) eq 'ARRAY') {
4943: $compare=join('',@{$locker});
4944: if ($compare ne $symb_crs) {
4945: push(@new_locks, $locker);
4946: }
4947: }
4948: }
4949: if (scalar(@new_locks) > 0) {
4950: $current_permissions{$file} = \@new_locks;
4951: } else {
4952: push(@del_keys, $file);
4953: &del('file_permissions',\@del_keys, $domain, $user);
4954: delete($current_permissions{$file});
4955: }
4956: }
4957: }
4958: &put('file_permissions',\%current_permissions,$domain,$user);
4959: return;
4960: }
4961:
4962: # ------------------------------------------------------------ Directory lister
4963:
4964: sub dirlist {
4965: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
4966:
4967: $uri=~s/^\///;
4968: $uri=~s/\/$//;
4969: my ($udom, $uname);
4970: (undef,$udom,$uname)=split(/\//,$uri);
4971: if(defined($userdomain)) {
4972: $udom = $userdomain;
4973: }
4974: if(defined($username)) {
4975: $uname = $username;
4976: }
4977:
4978: my $dirRoot = $perlvar{'lonDocRoot'};
4979: if(defined($alternateDirectoryRoot)) {
4980: $dirRoot = $alternateDirectoryRoot;
4981: $dirRoot =~ s/\/$//;
4982: }
4983:
4984: if($udom) {
4985: if($uname) {
4986: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
4987: homeserver($uname,$udom));
4988: my @listing_results;
4989: if ($listing eq 'unknown_cmd') {
4990: $listing=reply('ls:'.$dirRoot.'/'.$uri,
4991: homeserver($uname,$udom));
4992: @listing_results = split(/:/,$listing);
4993: } else {
4994: @listing_results = map { &unescape($_); } split(/:/,$listing);
4995: }
4996: return @listing_results;
4997: } elsif(!defined($alternateDirectoryRoot)) {
4998: my $tryserver;
4999: my %allusers=();
5000: foreach $tryserver (keys %libserv) {
5001: if($hostdom{$tryserver} eq $udom) {
5002: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
5003: $udom, $tryserver);
5004: my @listing_results;
5005: if ($listing eq 'unknown_cmd') {
5006: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
5007: $udom, $tryserver);
5008: @listing_results = split(/:/,$listing);
5009: } else {
5010: @listing_results =
5011: map { &unescape($_); } split(/:/,$listing);
5012: }
5013: if ($listing_results[0] ne 'no_such_dir' &&
5014: $listing_results[0] ne 'empty' &&
5015: $listing_results[0] ne 'con_lost') {
5016: foreach (@listing_results) {
5017: my ($entry,@stat)=split(/&/,$_);
5018: $allusers{$entry}=1;
5019: }
5020: }
5021: }
5022: }
5023: my $alluserstr='';
5024: foreach (sort keys %allusers) {
5025: $alluserstr.=$_.'&user:';
5026: }
5027: $alluserstr=~s/:$//;
5028: return split(/:/,$alluserstr);
5029: } else {
5030: my @emptyResults = ();
5031: push(@emptyResults, 'missing user name');
5032: return split(':',@emptyResults);
5033: }
5034: } elsif(!defined($alternateDirectoryRoot)) {
5035: my $tryserver;
5036: my %alldom=();
5037: foreach $tryserver (keys %libserv) {
5038: $alldom{$hostdom{$tryserver}}=1;
5039: }
5040: my $alldomstr='';
5041: foreach (sort keys %alldom) {
5042: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
5043: }
5044: $alldomstr=~s/:$//;
5045: return split(/:/,$alldomstr);
5046: } else {
5047: my @emptyResults = ();
5048: push(@emptyResults, 'missing domain');
5049: return split(':',@emptyResults);
5050: }
5051: }
5052:
5053: # --------------------------------------------- GetFileTimestamp
5054: # This function utilizes dirlist and returns the date stamp for
5055: # when it was last modified. It will also return an error of -1
5056: # if an error occurs
5057:
5058: ##
5059: ## FIXME: This subroutine assumes its caller knows something about the
5060: ## directory structure of the home server for the student ($root).
5061: ## Not a good assumption to make. Since this is for looking up files
5062: ## in user directories, the full path should be constructed by lond, not
5063: ## whatever machine we request data from.
5064: ##
5065: sub GetFileTimestamp {
5066: my ($studentDomain,$studentName,$filename,$root)=@_;
5067: $studentDomain=~s/\W//g;
5068: $studentName=~s/\W//g;
5069: my $subdir=$studentName.'__';
5070: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
5071: my $proname="$studentDomain/$subdir/$studentName";
5072: $proname .= '/'.$filename;
5073: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
5074: $studentName, $root);
5075: my @stats = split('&', $fileStat);
5076: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5077: # @stats contains first the filename, then the stat output
5078: return $stats[10]; # so this is 10 instead of 9.
5079: } else {
5080: return -1;
5081: }
5082: }
5083:
5084: sub stat_file {
5085: my ($uri) = @_;
5086: $uri = &clutter($uri);
5087:
5088: # we want just the url part without the unneeded accessor url bits
5089: if ($uri =~ m-^/adm/-) {
5090: $uri=~s-^/adm/wrapper/-/-;
5091: $uri=~s-^/adm/coursedocs/showdoc/-/-;
5092: }
5093: my ($udom,$uname,$file,$dir);
5094: if ($uri =~ m-^/(uploaded|editupload)/-) {
5095: ($udom,$uname,$file) =
5096: ($uri =~ m-/(?:uploaded|editupload)/?([^/]*)/?([^/]*)/?(.*)-);
5097: $file = 'userfiles/'.$file;
5098: $dir = &propath($udom,$uname);
5099: }
5100: if ($uri =~ m-^/res/-) {
5101: ($udom,$uname) =
5102: ($uri =~ m-/(?:res)/?([^/]*)/?([^/]*)/-);
5103: $file = $uri;
5104: }
5105:
5106: if (!$udom || !$uname || !$file) {
5107: # unable to handle the uri
5108: return ();
5109: }
5110:
5111: my ($result) = &dirlist($file,$udom,$uname,$dir);
5112: my @stats = split('&', $result);
5113:
5114: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5115: shift(@stats); #filename is first
5116: return @stats;
5117: }
5118: return ();
5119: }
5120:
5121: # -------------------------------------------------------- Value of a Condition
5122:
5123: # gets the value of a specific preevaluated condition
5124: # stored in the string $env{user.state.<cid>}
5125: # or looks up a condition reference in the bighash and if if hasn't
5126: # already been evaluated recurses into docondval to get the value of
5127: # the condition, then memoizing it to
5128: # $env{user.state.<cid>.<condition>}
5129: sub directcondval {
5130: my $number=shift;
5131: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
5132: &Apache::lonuserstate::evalstate();
5133: }
5134: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
5135: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
5136: } elsif ($number =~ /^_/) {
5137: my $sub_condition;
5138: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5139: &GDBM_READER(),0640)) {
5140: $sub_condition=$bighash{'conditions'.$number};
5141: untie(%bighash);
5142: }
5143: my $value = &docondval($sub_condition);
5144: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
5145: return $value;
5146: }
5147: if ($env{'user.state.'.$env{'request.course.id'}}) {
5148: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
5149: } else {
5150: return 2;
5151: }
5152: }
5153:
5154: # get the collection of conditions for this resource
5155: sub condval {
5156: my $condidx=shift;
5157: my $allpathcond='';
5158: foreach my $cond (split(/\|/,$condidx)) {
5159: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
5160: $allpathcond.=
5161: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
5162: }
5163: }
5164: $allpathcond=~s/\|$//;
5165: return &docondval($allpathcond);
5166: }
5167:
5168: #evaluates an expression of conditions
5169: sub docondval {
5170: my ($allpathcond) = @_;
5171: my $result=0;
5172: if ($env{'request.course.id'}
5173: && defined($allpathcond)) {
5174: my $operand='|';
5175: my @stack;
5176: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
5177: if ($chunk eq '(') {
5178: push @stack,($operand,$result);
5179: } elsif ($chunk eq ')') {
5180: my $before=pop @stack;
5181: if (pop @stack eq '&') {
5182: $result=$result>$before?$before:$result;
5183: } else {
5184: $result=$result>$before?$result:$before;
5185: }
5186: } elsif (($chunk eq '&') || ($chunk eq '|')) {
5187: $operand=$chunk;
5188: } else {
5189: my $new=directcondval($chunk);
5190: if ($operand eq '&') {
5191: $result=$result>$new?$new:$result;
5192: } else {
5193: $result=$result>$new?$result:$new;
5194: }
5195: }
5196: }
5197: }
5198: return $result;
5199: }
5200:
5201: # ---------------------------------------------------- Devalidate courseresdata
5202:
5203: sub devalidatecourseresdata {
5204: my ($coursenum,$coursedomain)=@_;
5205: my $hashid=$coursenum.':'.$coursedomain;
5206: &devalidate_cache_new('courseres',$hashid);
5207: }
5208:
5209: # --------------------------------------------------- Course Resourcedata Query
5210:
5211: sub get_courseresdata {
5212: my ($coursenum,$coursedomain)=@_;
5213: my $coursehom=&homeserver($coursenum,$coursedomain);
5214: my $hashid=$coursenum.':'.$coursedomain;
5215: my ($result,$cached)=&is_cached_new('courseres',$hashid);
5216: my %dumpreply;
5217: unless (defined($cached)) {
5218: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
5219: $result=\%dumpreply;
5220: my ($tmp) = keys(%dumpreply);
5221: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
5222: &do_cache_new('courseres',$hashid,$result,600);
5223: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
5224: return $tmp;
5225: } elsif ($tmp =~ /^(error)/) {
5226: $result=undef;
5227: &do_cache_new('courseres',$hashid,$result,600);
5228: }
5229: }
5230: return $result;
5231: }
5232:
5233: sub devalidateuserresdata {
5234: my ($uname,$udom)=@_;
5235: my $hashid="$udom:$uname";
5236: &devalidate_cache_new('userres',$hashid);
5237: }
5238:
5239: sub get_userresdata {
5240: my ($uname,$udom)=@_;
5241: #most student don\'t have any data set, check if there is some data
5242: if (&EXT_cache_status($udom,$uname)) { return undef; }
5243:
5244: my $hashid="$udom:$uname";
5245: my ($result,$cached)=&is_cached_new('userres',$hashid);
5246: if (!defined($cached)) {
5247: my %resourcedata=&dump('resourcedata',$udom,$uname);
5248: $result=\%resourcedata;
5249: &do_cache_new('userres',$hashid,$result,600);
5250: }
5251: my ($tmp)=keys(%$result);
5252: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
5253: return $result;
5254: }
5255: #error 2 occurs when the .db doesn't exist
5256: if ($tmp!~/error: 2 /) {
5257: &logthis("<font color=\"blue\">WARNING:".
5258: " Trying to get resource data for ".
5259: $uname." at ".$udom.": ".
5260: $tmp."</font>");
5261: } elsif ($tmp=~/error: 2 /) {
5262: #&EXT_cache_set($udom,$uname);
5263: &do_cache_new('userres',$hashid,undef,600);
5264: undef($tmp); # not really an error so don't send it back
5265: }
5266: return $tmp;
5267: }
5268:
5269: sub resdata {
5270: my ($name,$domain,$type,@which)=@_;
5271: my $result;
5272: if ($type eq 'course') {
5273: $result=&get_courseresdata($name,$domain);
5274: } elsif ($type eq 'user') {
5275: $result=&get_userresdata($name,$domain);
5276: }
5277: if (!ref($result)) { return $result; }
5278: foreach my $item (@which) {
5279: if (defined($result->{$item})) {
5280: return $result->{$item};
5281: }
5282: }
5283: return undef;
5284: }
5285:
5286: #
5287: # EXT resource caching routines
5288: #
5289:
5290: sub clear_EXT_cache_status {
5291: &delenv('cache.EXT.');
5292: }
5293:
5294: sub EXT_cache_status {
5295: my ($target_domain,$target_user) = @_;
5296: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5297: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
5298: # We know already the user has no data
5299: return 1;
5300: } else {
5301: return 0;
5302: }
5303: }
5304:
5305: sub EXT_cache_set {
5306: my ($target_domain,$target_user) = @_;
5307: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5308: #&appenv($cachename => time);
5309: }
5310:
5311: # --------------------------------------------------------- Value of a Variable
5312: sub EXT {
5313:
5314: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
5315: unless ($varname) { return ''; }
5316: #get real user name/domain, courseid and symb
5317: my $courseid;
5318: my $publicuser;
5319: if ($symbparm) {
5320: $symbparm=&get_symb_from_alias($symbparm);
5321: }
5322: if (!($uname && $udom)) {
5323: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
5324: &Apache::lonxml::whichuser($symbparm);
5325: if (!$symbparm) { $symbparm=$cursymb; }
5326: } else {
5327: $courseid=$env{'request.course.id'};
5328: }
5329: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
5330: my $rest;
5331: if (defined($therest[0])) {
5332: $rest=join('.',@therest);
5333: } else {
5334: $rest='';
5335: }
5336:
5337: my $qualifierrest=$qualifier;
5338: if ($rest) { $qualifierrest.='.'.$rest; }
5339: my $spacequalifierrest=$space;
5340: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
5341: if ($realm eq 'user') {
5342: # --------------------------------------------------------------- user.resource
5343: if ($space eq 'resource') {
5344: if ( (defined($Apache::lonhomework::parsing_a_problem)
5345: || defined($Apache::lonhomework::parsing_a_task))
5346: &&
5347: ($symbparm eq &symbread()) ) {
5348: # if we are in the middle of processing the resource the
5349: # get the value we are planning on committing
5350: if (defined($Apache::lonhomework::results{$qualifierrest})) {
5351: return $Apache::lonhomework::results{$qualifierrest};
5352: } else {
5353: return $Apache::lonhomework::history{$qualifierrest};
5354: }
5355: } else {
5356: my %restored;
5357: if ($publicuser || $env{'request.state'} eq 'construct') {
5358: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
5359: } else {
5360: %restored=&restore($symbparm,$courseid,$udom,$uname);
5361: }
5362: return $restored{$qualifierrest};
5363: }
5364: # ----------------------------------------------------------------- user.access
5365: } elsif ($space eq 'access') {
5366: # FIXME - not supporting calls for a specific user
5367: return &allowed($qualifier,$rest);
5368: # ------------------------------------------ user.preferences, user.environment
5369: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
5370: if (($uname eq $env{'user.name'}) &&
5371: ($udom eq $env{'user.domain'})) {
5372: return $env{join('.',('environment',$qualifierrest))};
5373: } else {
5374: my %returnhash;
5375: if (!$publicuser) {
5376: %returnhash=&userenvironment($udom,$uname,
5377: $qualifierrest);
5378: }
5379: return $returnhash{$qualifierrest};
5380: }
5381: # ----------------------------------------------------------------- user.course
5382: } elsif ($space eq 'course') {
5383: # FIXME - not supporting calls for a specific user
5384: return $env{join('.',('request.course',$qualifier))};
5385: # ------------------------------------------------------------------- user.role
5386: } elsif ($space eq 'role') {
5387: # FIXME - not supporting calls for a specific user
5388: my ($role,$where)=split(/\./,$env{'request.role'});
5389: if ($qualifier eq 'value') {
5390: return $role;
5391: } elsif ($qualifier eq 'extent') {
5392: return $where;
5393: }
5394: # ----------------------------------------------------------------- user.domain
5395: } elsif ($space eq 'domain') {
5396: return $udom;
5397: # ------------------------------------------------------------------- user.name
5398: } elsif ($space eq 'name') {
5399: return $uname;
5400: # ---------------------------------------------------- Any other user namespace
5401: } else {
5402: my %reply;
5403: if (!$publicuser) {
5404: %reply=&get($space,[$qualifierrest],$udom,$uname);
5405: }
5406: return $reply{$qualifierrest};
5407: }
5408: } elsif ($realm eq 'query') {
5409: # ---------------------------------------------- pull stuff out of query string
5410: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
5411: [$spacequalifierrest]);
5412: return $env{'form.'.$spacequalifierrest};
5413: } elsif ($realm eq 'request') {
5414: # ------------------------------------------------------------- request.browser
5415: if ($space eq 'browser') {
5416: if ($qualifier eq 'textremote') {
5417: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
5418: return 1;
5419: } else {
5420: return 0;
5421: }
5422: } else {
5423: return $env{'browser.'.$qualifier};
5424: }
5425: # ------------------------------------------------------------ request.filename
5426: } else {
5427: return $env{'request.'.$spacequalifierrest};
5428: }
5429: } elsif ($realm eq 'course') {
5430: # ---------------------------------------------------------- course.description
5431: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
5432: } elsif ($realm eq 'resource') {
5433:
5434: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
5435: if (!$symbparm) { $symbparm=&symbread(); }
5436: }
5437:
5438: if ($space eq 'title') {
5439: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
5440: return &gettitle($symbparm);
5441: }
5442:
5443: if ($space eq 'map') {
5444: my ($map) = &decode_symb($symbparm);
5445: return &symbread($map);
5446: }
5447:
5448: my ($section, $group, @groups);
5449: my ($courselevelm,$courselevel);
5450: if ($symbparm && defined($courseid) &&
5451: $courseid eq $env{'request.course.id'}) {
5452:
5453: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
5454:
5455: # ----------------------------------------------------- Cascading lookup scheme
5456: my $symbp=$symbparm;
5457: my $mapp=&deversion((&decode_symb($symbp))[0]);
5458:
5459: my $symbparm=$symbp.'.'.$spacequalifierrest;
5460: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
5461:
5462: if (($env{'user.name'} eq $uname) &&
5463: ($env{'user.domain'} eq $udom)) {
5464: $section=$env{'request.course.sec'};
5465: @groups = split(/:/,$env{'request.course.groups'});
5466: @groups=&sort_course_groups($courseid,@groups);
5467: } else {
5468: if (! defined($usection)) {
5469: $section=&getsection($udom,$uname,$courseid);
5470: } else {
5471: $section = $usection;
5472: }
5473: @groups = &get_users_groups($udom,$uname,$courseid);
5474: }
5475:
5476: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
5477: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
5478: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
5479:
5480: $courselevel=$courseid.'.'.$spacequalifierrest;
5481: my $courselevelr=$courseid.'.'.$symbparm;
5482: $courselevelm=$courseid.'.'.$mapparm;
5483:
5484: # ----------------------------------------------------------- first, check user
5485:
5486: my $userreply=&resdata($uname,$udom,'user',
5487: ($courselevelr,$courselevelm,
5488: $courselevel));
5489: if (defined($userreply)) { return $userreply; }
5490:
5491: # ------------------------------------------------ second, check some of course
5492: my $coursereply;
5493: if (@groups > 0) {
5494: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
5495: $mapparm,$spacequalifierrest);
5496: if (defined($coursereply)) { return $coursereply; }
5497: }
5498:
5499: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5500: $env{'course.'.$courseid.'.domain'},
5501: 'course',
5502: ($seclevelr,$seclevelm,$seclevel,
5503: $courselevelr));
5504: if (defined($coursereply)) { return $coursereply; }
5505:
5506: # ------------------------------------------------------ third, check map parms
5507: my %parmhash=();
5508: my $thisparm='';
5509: if (tie(%parmhash,'GDBM_File',
5510: $env{'request.course.fn'}.'_parms.db',
5511: &GDBM_READER(),0640)) {
5512: $thisparm=$parmhash{$symbparm};
5513: untie(%parmhash);
5514: }
5515: if ($thisparm) { return $thisparm; }
5516: }
5517: # ------------------------------------------ fourth, look in resource metadata
5518:
5519: $spacequalifierrest=~s/\./\_/;
5520: my $filename;
5521: if (!$symbparm) { $symbparm=&symbread(); }
5522: if ($symbparm) {
5523: $filename=(&decode_symb($symbparm))[2];
5524: } else {
5525: $filename=$env{'request.filename'};
5526: }
5527: my $metadata=&metadata($filename,$spacequalifierrest);
5528: if (defined($metadata)) { return $metadata; }
5529: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
5530: if (defined($metadata)) { return $metadata; }
5531:
5532: # ---------------------------------------------- fourth, look in rest pf course
5533: if ($symbparm && defined($courseid) &&
5534: $courseid eq $env{'request.course.id'}) {
5535: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5536: $env{'course.'.$courseid.'.domain'},
5537: 'course',
5538: ($courselevelm,$courselevel));
5539: if (defined($coursereply)) { return $coursereply; }
5540: }
5541: # ------------------------------------------------------------------ Cascade up
5542: unless ($space eq '0') {
5543: my @parts=split(/_/,$space);
5544: my $id=pop(@parts);
5545: my $part=join('_',@parts);
5546: if ($part eq '') { $part='0'; }
5547: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
5548: $symbparm,$udom,$uname,$section,1);
5549: if (defined($partgeneral)) { return $partgeneral; }
5550: }
5551: if ($recurse) { return undef; }
5552: my $pack_def=&packages_tab_default($filename,$varname);
5553: if (defined($pack_def)) { return $pack_def; }
5554:
5555: # ---------------------------------------------------- Any other user namespace
5556: } elsif ($realm eq 'environment') {
5557: # ----------------------------------------------------------------- environment
5558: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
5559: return $env{'environment.'.$spacequalifierrest};
5560: } else {
5561: my %returnhash=&userenvironment($udom,$uname,
5562: $spacequalifierrest);
5563: return $returnhash{$spacequalifierrest};
5564: }
5565: } elsif ($realm eq 'system') {
5566: # ----------------------------------------------------------------- system.time
5567: if ($space eq 'time') {
5568: return time;
5569: }
5570: } elsif ($realm eq 'server') {
5571: # ----------------------------------------------------------------- system.time
5572: if ($space eq 'name') {
5573: return $ENV{'SERVER_NAME'};
5574: }
5575: }
5576: return '';
5577: }
5578:
5579: sub check_group_parms {
5580: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
5581: my @groupitems = ();
5582: my $resultitem;
5583: my @levels = ($symbparm,$mapparm,$what);
5584: foreach my $group (@{$groups}) {
5585: foreach my $level (@levels) {
5586: my $item = $courseid.'.['.$group.'].'.$level;
5587: push(@groupitems,$item);
5588: }
5589: }
5590: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
5591: $env{'course.'.$courseid.'.domain'},
5592: 'course',@groupitems);
5593: return $coursereply;
5594: }
5595:
5596: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
5597: my ($courseid,@groups) = @_;
5598: @groups = sort(@groups);
5599: return @groups;
5600: }
5601:
5602: sub packages_tab_default {
5603: my ($uri,$varname)=@_;
5604: my (undef,$part,$name)=split(/\./,$varname);
5605:
5606: my (@extension,@specifics,$do_default);
5607: foreach my $package (split(/,/,&metadata($uri,'packages'))) {
5608: my ($pack_type,$pack_part)=split(/_/,$package,2);
5609: if ($pack_type eq 'default') {
5610: $do_default=1;
5611: } elsif ($pack_type eq 'extension') {
5612: push(@extension,[$package,$pack_type,$pack_part]);
5613: } else {
5614: push(@specifics,[$package,$pack_type,$pack_part]);
5615: }
5616: }
5617: # first look for a package that matches the requested part id
5618: foreach my $package (@specifics) {
5619: my (undef,$pack_type,$pack_part)=@{$package};
5620: next if ($pack_part ne $part);
5621: if (defined($packagetab{"$pack_type&$name&default"})) {
5622: return $packagetab{"$pack_type&$name&default"};
5623: }
5624: }
5625: # look for any possible matching non extension_ package
5626: foreach my $package (@specifics) {
5627: my (undef,$pack_type,$pack_part)=@{$package};
5628: if (defined($packagetab{"$pack_type&$name&default"})) {
5629: return $packagetab{"$pack_type&$name&default"};
5630: }
5631: if ($pack_type eq 'part') { $pack_part='0'; }
5632: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
5633: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
5634: }
5635: }
5636: # look for any posible extension_ match
5637: foreach my $package (@extension) {
5638: my ($package,$pack_type)=@{$package};
5639: if (defined($packagetab{"$pack_type&$name&default"})) {
5640: return $packagetab{"$pack_type&$name&default"};
5641: }
5642: if (defined($packagetab{$package."&$name&default"})) {
5643: return $packagetab{$package."&$name&default"};
5644: }
5645: }
5646: # look for a global default setting
5647: if ($do_default && defined($packagetab{"default&$name&default"})) {
5648: return $packagetab{"default&$name&default"};
5649: }
5650: return undef;
5651: }
5652:
5653: sub add_prefix_and_part {
5654: my ($prefix,$part)=@_;
5655: my $keyroot;
5656: if (defined($prefix) && $prefix !~ /^__/) {
5657: # prefix that has a part already
5658: $keyroot=$prefix;
5659: } elsif (defined($prefix)) {
5660: # prefix that is missing a part
5661: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
5662: } else {
5663: # no prefix at all
5664: if (defined($part)) { $keyroot='_'.$part; }
5665: }
5666: return $keyroot;
5667: }
5668:
5669: # ---------------------------------------------------------------- Get metadata
5670:
5671: my %metaentry;
5672: sub metadata {
5673: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
5674: $uri=&declutter($uri);
5675: # if it is a non metadata possible uri return quickly
5676: if (($uri eq '') ||
5677: (($uri =~ m|^/*adm/|) &&
5678: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
5679: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
5680: ($uri =~ m|home/[^/]+/public_html/|)) {
5681: return undef;
5682: }
5683: my $filename=$uri;
5684: $uri=~s/\.meta$//;
5685: #
5686: # Is the metadata already cached?
5687: # Look at timestamp of caching
5688: # Everything is cached by the main uri, libraries are never directly cached
5689: #
5690: if (!defined($liburi)) {
5691: my ($result,$cached)=&is_cached_new('meta',$uri);
5692: if (defined($cached)) { return $result->{':'.$what}; }
5693: }
5694: {
5695: #
5696: # Is this a recursive call for a library?
5697: #
5698: # if (! exists($metacache{$uri})) {
5699: # $metacache{$uri}={};
5700: # }
5701: if ($liburi) {
5702: $liburi=&declutter($liburi);
5703: $filename=$liburi;
5704: } else {
5705: &devalidate_cache_new('meta',$uri);
5706: undef(%metaentry);
5707: }
5708: my %metathesekeys=();
5709: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
5710: my $metastring;
5711: if ($uri !~ m -^(uploaded|editupload)/-) {
5712: my $file=&filelocation('',&clutter($filename));
5713: #push(@{$metaentry{$uri.'.file'}},$file);
5714: $metastring=&getfile($file);
5715: }
5716: my $parser=HTML::LCParser->new(\$metastring);
5717: my $token;
5718: undef %metathesekeys;
5719: while ($token=$parser->get_token) {
5720: if ($token->[0] eq 'S') {
5721: if (defined($token->[2]->{'package'})) {
5722: #
5723: # This is a package - get package info
5724: #
5725: my $package=$token->[2]->{'package'};
5726: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5727: if (defined($token->[2]->{'id'})) {
5728: $keyroot.='_'.$token->[2]->{'id'};
5729: }
5730: if ($metaentry{':packages'}) {
5731: $metaentry{':packages'}.=','.$package.$keyroot;
5732: } else {
5733: $metaentry{':packages'}=$package.$keyroot;
5734: }
5735: foreach my $pack_entry (keys(%packagetab)) {
5736: my $part=$keyroot;
5737: $part=~s/^\_//;
5738: if ($pack_entry=~/^\Q$package\E\&/ ||
5739: $pack_entry=~/^\Q$package\E_0\&/) {
5740: my ($pack,$name,$subp)=split(/\&/,$pack_entry);
5741: # ignore package.tab specified default values
5742: # here &package_tab_default() will fetch those
5743: if ($subp eq 'default') { next; }
5744: my $value=$packagetab{$pack_entry};
5745: my $unikey;
5746: if ($pack =~ /_0$/) {
5747: $unikey='parameter_0_'.$name;
5748: $part=0;
5749: } else {
5750: $unikey='parameter'.$keyroot.'_'.$name;
5751: }
5752: if ($subp eq 'display') {
5753: $value.=' [Part: '.$part.']';
5754: }
5755: $metaentry{':'.$unikey.'.part'}=$part;
5756: $metathesekeys{$unikey}=1;
5757: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5758: $metaentry{':'.$unikey.'.'.$subp}=$value;
5759: }
5760: if (defined($metaentry{':'.$unikey.'.default'})) {
5761: $metaentry{':'.$unikey}=
5762: $metaentry{':'.$unikey.'.default'};
5763: }
5764: }
5765: }
5766: } else {
5767: #
5768: # This is not a package - some other kind of start tag
5769: #
5770: my $entry=$token->[1];
5771: my $unikey;
5772: if ($entry eq 'import') {
5773: $unikey='';
5774: } else {
5775: $unikey=$entry;
5776: }
5777: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5778:
5779: if (defined($token->[2]->{'id'})) {
5780: $unikey.='_'.$token->[2]->{'id'};
5781: }
5782:
5783: if ($entry eq 'import') {
5784: #
5785: # Importing a library here
5786: #
5787: if ($depthcount<20) {
5788: my $location=$parser->get_text('/import');
5789: my $dir=$filename;
5790: $dir=~s|[^/]*$||;
5791: $location=&filelocation($dir,$location);
5792: my $metadata =
5793: &metadata($uri,'keys', $location,$unikey,
5794: $depthcount+1);
5795: foreach my $meta (split(',',$metadata)) {
5796: $metaentry{':'.$meta}=$metaentry{':'.$meta};
5797: $metathesekeys{$meta}=1;
5798: }
5799: }
5800: } else {
5801:
5802: if (defined($token->[2]->{'name'})) {
5803: $unikey.='_'.$token->[2]->{'name'};
5804: }
5805: $metathesekeys{$unikey}=1;
5806: foreach my $param (@{$token->[3]}) {
5807: $metaentry{':'.$unikey.'.'.$param} =
5808: $token->[2]->{$param};
5809: }
5810: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
5811: my $default=$metaentry{':'.$unikey.'.default'};
5812: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
5813: # only ws inside the tag, and not in default, so use default
5814: # as value
5815: $metaentry{':'.$unikey}=$default;
5816: } else {
5817: # either something interesting inside the tag or default
5818: # uninteresting
5819: $metaentry{':'.$unikey}=$internaltext;
5820: }
5821: # end of not-a-package not-a-library import
5822: }
5823: # end of not-a-package start tag
5824: }
5825: # the next is the end of "start tag"
5826: }
5827: }
5828: my ($extension) = ($uri =~ /\.(\w+)$/);
5829: foreach my $key (keys(%packagetab)) {
5830: #no specific packages #how's our extension
5831: if ($key!~/^extension_\Q$extension\E&/) { next; }
5832: &metadata_create_package_def($uri,$key,'extension_'.$extension,
5833: \%metathesekeys);
5834: }
5835: if (!exists($metaentry{':packages'})) {
5836: foreach my $key (keys(%packagetab)) {
5837: #no specific packages well let's get default then
5838: if ($key!~/^default&/) { next; }
5839: &metadata_create_package_def($uri,$key,'default',
5840: \%metathesekeys);
5841: }
5842: }
5843: # are there custom rights to evaluate
5844: if ($metaentry{':copyright'} eq 'custom') {
5845:
5846: #
5847: # Importing a rights file here
5848: #
5849: unless ($depthcount) {
5850: my $location=$metaentry{':customdistributionfile'};
5851: my $dir=$filename;
5852: $dir=~s|[^/]*$||;
5853: $location=&filelocation($dir,$location);
5854: my $rights_metadata =
5855: &metadata($uri,'keys',$location,'_rights',
5856: $depthcount+1);
5857: foreach my $rights (split(',',$rights_metadata)) {
5858: #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
5859: $metathesekeys{$rights}=1;
5860: }
5861: }
5862: }
5863: # uniqifiy package listing
5864: my %seen;
5865: my @uniq_packages =
5866: grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
5867: $metaentry{':packages'} = join(',',@uniq_packages);
5868:
5869: $metaentry{':keys'} = join(',',keys(%metathesekeys));
5870: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
5871: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
5872: &do_cache_new('meta',$uri,\%metaentry,60*60);
5873: # this is the end of "was not already recently cached
5874: }
5875: return $metaentry{':'.$what};
5876: }
5877:
5878: sub metadata_create_package_def {
5879: my ($uri,$key,$package,$metathesekeys)=@_;
5880: my ($pack,$name,$subp)=split(/\&/,$key);
5881: if ($subp eq 'default') { next; }
5882:
5883: if (defined($metaentry{':packages'})) {
5884: $metaentry{':packages'}.=','.$package;
5885: } else {
5886: $metaentry{':packages'}=$package;
5887: }
5888: my $value=$packagetab{$key};
5889: my $unikey;
5890: $unikey='parameter_0_'.$name;
5891: $metaentry{':'.$unikey.'.part'}=0;
5892: $$metathesekeys{$unikey}=1;
5893: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5894: $metaentry{':'.$unikey.'.'.$subp}=$value;
5895: }
5896: if (defined($metaentry{':'.$unikey.'.default'})) {
5897: $metaentry{':'.$unikey}=
5898: $metaentry{':'.$unikey.'.default'};
5899: }
5900: }
5901:
5902: sub metadata_generate_part0 {
5903: my ($metadata,$metacache,$uri) = @_;
5904: my %allnames;
5905: foreach my $metakey (keys(%$metadata)) {
5906: if ($metakey=~/^parameter\_(.*)/) {
5907: my $part=$$metacache{':'.$metakey.'.part'};
5908: my $name=$$metacache{':'.$metakey.'.name'};
5909: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
5910: $allnames{$name}=$part;
5911: }
5912: }
5913: }
5914: foreach my $name (keys(%allnames)) {
5915: $$metadata{"parameter_0_$name"}=1;
5916: my $key=":parameter_0_$name";
5917: $$metacache{"$key.part"}='0';
5918: $$metacache{"$key.name"}=$name;
5919: $$metacache{"$key.type"}=$$metacache{':parameter_'.
5920: $allnames{$name}.'_'.$name.
5921: '.type'};
5922: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
5923: '.display'};
5924: my $expr='[Part: '.$allnames{$name}.']';
5925: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
5926: $$metacache{"$key.display"}=$olddis;
5927: }
5928: }
5929:
5930: # ------------------------------------------------- Get the title of a resource
5931:
5932: sub gettitle {
5933: my $urlsymb=shift;
5934: my $symb=&symbread($urlsymb);
5935: if ($symb) {
5936: my $key=$env{'request.course.id'}."\0".$symb;
5937: my ($result,$cached)=&is_cached_new('title',$key);
5938: if (defined($cached)) {
5939: return $result;
5940: }
5941: my ($map,$resid,$url)=&decode_symb($symb);
5942: my $title='';
5943: my %bighash;
5944: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5945: &GDBM_READER(),0640)) {
5946: my $mapid=$bighash{'map_pc_'.&clutter($map)};
5947: $title=$bighash{'title_'.$mapid.'.'.$resid};
5948: untie %bighash;
5949: }
5950: $title=~s/\&colon\;/\:/gs;
5951: if ($title) {
5952: return &do_cache_new('title',$key,$title,600);
5953: }
5954: $urlsymb=$url;
5955: }
5956: my $title=&metadata($urlsymb,'title');
5957: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
5958: return $title;
5959: }
5960:
5961: sub get_slot {
5962: my ($which,$cnum,$cdom)=@_;
5963: if (!$cnum || !$cdom) {
5964: (undef,my $courseid)=&Apache::lonxml::whichuser();
5965: $cdom=$env{'course.'.$courseid.'.domain'};
5966: $cnum=$env{'course.'.$courseid.'.num'};
5967: }
5968: my $key=join("\0",'slots',$cdom,$cnum,$which);
5969: my %slotinfo;
5970: if (exists($remembered{$key})) {
5971: $slotinfo{$which} = $remembered{$key};
5972: } else {
5973: %slotinfo=&get('slots',[$which],$cdom,$cnum);
5974: &Apache::lonhomework::showhash(%slotinfo);
5975: my ($tmp)=keys(%slotinfo);
5976: if ($tmp=~/^error:/) { return (); }
5977: $remembered{$key} = $slotinfo{$which};
5978: }
5979: if (ref($slotinfo{$which}) eq 'HASH') {
5980: return %{$slotinfo{$which}};
5981: }
5982: return $slotinfo{$which};
5983: }
5984: # ------------------------------------------------- Update symbolic store links
5985:
5986: sub symblist {
5987: my ($mapname,%newhash)=@_;
5988: $mapname=&deversion(&declutter($mapname));
5989: my %hash;
5990: if (($env{'request.course.fn'}) && (%newhash)) {
5991: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5992: &GDBM_WRCREAT(),0640)) {
5993: foreach my $url (keys %newhash) {
5994: next if ($url eq 'last_known'
5995: && $env{'form.no_update_last_known'});
5996: $hash{declutter($url)}=&encode_symb($mapname,
5997: $newhash{$url}->[1],
5998: $newhash{$url}->[0]);
5999: }
6000: if (untie(%hash)) {
6001: return 'ok';
6002: }
6003: }
6004: }
6005: return 'error';
6006: }
6007:
6008: # --------------------------------------------------------------- Verify a symb
6009:
6010: sub symbverify {
6011: my ($symb,$thisurl)=@_;
6012: my $thisfn=$thisurl;
6013: # wrapper not part of symbs
6014: $thisfn=~s/^\/adm\/wrapper//;
6015: $thisfn=~s/^\/adm\/coursedocs\/showdoc\///;
6016: $thisfn=&declutter($thisfn);
6017: # direct jump to resource in page or to a sequence - will construct own symbs
6018: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
6019: # check URL part
6020: my ($map,$resid,$url)=&decode_symb($symb);
6021:
6022: unless ($url eq $thisfn) { return 0; }
6023:
6024: $symb=&symbclean($symb);
6025: $thisurl=&deversion($thisurl);
6026: $thisfn=&deversion($thisfn);
6027:
6028: my %bighash;
6029: my $okay=0;
6030:
6031: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6032: &GDBM_READER(),0640)) {
6033: my $ids=$bighash{'ids_'.&clutter($thisurl)};
6034: unless ($ids) {
6035: $ids=$bighash{'ids_/'.$thisurl};
6036: }
6037: if ($ids) {
6038: # ------------------------------------------------------------------- Has ID(s)
6039: foreach (split(/\,/,$ids)) {
6040: my ($mapid,$resid)=split(/\./,$_);
6041: if (
6042: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
6043: eq $symb) {
6044: if (($env{'request.role.adv'}) ||
6045: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
6046: $okay=1;
6047: }
6048: }
6049: }
6050: }
6051: untie(%bighash);
6052: }
6053: return $okay;
6054: }
6055:
6056: # --------------------------------------------------------------- Clean-up symb
6057:
6058: sub symbclean {
6059: my $symb=shift;
6060: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6061: # remove version from map
6062: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
6063:
6064: # remove version from URL
6065: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
6066:
6067: # remove wrapper
6068:
6069: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
6070: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
6071: return $symb;
6072: }
6073:
6074: # ---------------------------------------------- Split symb to find map and url
6075:
6076: sub encode_symb {
6077: my ($map,$resid,$url)=@_;
6078: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
6079: }
6080:
6081: sub decode_symb {
6082: my $symb=shift;
6083: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6084: my ($map,$resid,$url)=split(/___/,$symb);
6085: return (&fixversion($map),$resid,&fixversion($url));
6086: }
6087:
6088: sub fixversion {
6089: my $fn=shift;
6090: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
6091: my %bighash;
6092: my $uri=&clutter($fn);
6093: my $key=$env{'request.course.id'}.'_'.$uri;
6094: # is this cached?
6095: my ($result,$cached)=&is_cached_new('courseresversion',$key);
6096: if (defined($cached)) { return $result; }
6097: # unfortunately not cached, or expired
6098: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6099: &GDBM_READER(),0640)) {
6100: if ($bighash{'version_'.$uri}) {
6101: my $version=$bighash{'version_'.$uri};
6102: unless (($version eq 'mostrecent') ||
6103: ($version==&getversion($uri))) {
6104: $uri=~s/\.(\w+)$/\.$version\.$1/;
6105: }
6106: }
6107: untie %bighash;
6108: }
6109: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
6110: }
6111:
6112: sub deversion {
6113: my $url=shift;
6114: $url=~s/\.\d+\.(\w+)$/\.$1/;
6115: return $url;
6116: }
6117:
6118: # ------------------------------------------------------ Return symb list entry
6119:
6120: sub symbread {
6121: my ($thisfn,$donotrecurse)=@_;
6122: my $cache_str='request.symbread.cached.'.$thisfn;
6123: if (defined($env{$cache_str})) { return $env{$cache_str}; }
6124: # no filename provided? try from environment
6125: unless ($thisfn) {
6126: if ($env{'request.symb'}) {
6127: return $env{$cache_str}=&symbclean($env{'request.symb'});
6128: }
6129: $thisfn=$env{'request.filename'};
6130: }
6131: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6132: # is that filename actually a symb? Verify, clean, and return
6133: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
6134: if (&symbverify($thisfn,$1)) {
6135: return $env{$cache_str}=&symbclean($thisfn);
6136: }
6137: }
6138: $thisfn=declutter($thisfn);
6139: my %hash;
6140: my %bighash;
6141: my $syval='';
6142: if (($env{'request.course.fn'}) && ($thisfn)) {
6143: my $targetfn = $thisfn;
6144: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
6145: $targetfn = 'adm/wrapper/'.$thisfn;
6146: }
6147: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
6148: $targetfn=$1;
6149: }
6150: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6151: &GDBM_READER(),0640)) {
6152: $syval=$hash{$targetfn};
6153: untie(%hash);
6154: }
6155: # ---------------------------------------------------------- There was an entry
6156: if ($syval) {
6157: #unless ($syval=~/\_\d+$/) {
6158: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
6159: #&appenv('request.ambiguous' => $thisfn);
6160: #return $env{$cache_str}='';
6161: #}
6162: #$syval.=$1;
6163: #}
6164: } else {
6165: # ------------------------------------------------------- Was not in symb table
6166: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6167: &GDBM_READER(),0640)) {
6168: # ---------------------------------------------- Get ID(s) for current resource
6169: my $ids=$bighash{'ids_'.&clutter($thisfn)};
6170: unless ($ids) {
6171: $ids=$bighash{'ids_/'.$thisfn};
6172: }
6173: unless ($ids) {
6174: # alias?
6175: $ids=$bighash{'mapalias_'.$thisfn};
6176: }
6177: if ($ids) {
6178: # ------------------------------------------------------------------- Has ID(s)
6179: my @possibilities=split(/\,/,$ids);
6180: if ($#possibilities==0) {
6181: # ----------------------------------------------- There is only one possibility
6182: my ($mapid,$resid)=split(/\./,$ids);
6183: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6184: $resid,$thisfn);
6185: } elsif (!$donotrecurse) {
6186: # ------------------------------------------ There is more than one possibility
6187: my $realpossible=0;
6188: foreach (@possibilities) {
6189: my $file=$bighash{'src_'.$_};
6190: if (&allowed('bre',$file)) {
6191: my ($mapid,$resid)=split(/\./,$_);
6192: if ($bighash{'map_type_'.$mapid} ne 'page') {
6193: $realpossible++;
6194: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6195: $resid,$thisfn);
6196: }
6197: }
6198: }
6199: if ($realpossible!=1) { $syval=''; }
6200: } else {
6201: $syval='';
6202: }
6203: }
6204: untie(%bighash)
6205: }
6206: }
6207: if ($syval) {
6208: return $env{$cache_str}=$syval;
6209: }
6210: }
6211: &appenv('request.ambiguous' => $thisfn);
6212: return $env{$cache_str}='';
6213: }
6214:
6215: # ---------------------------------------------------------- Return random seed
6216:
6217: sub numval {
6218: my $txt=shift;
6219: $txt=~tr/A-J/0-9/;
6220: $txt=~tr/a-j/0-9/;
6221: $txt=~tr/K-T/0-9/;
6222: $txt=~tr/k-t/0-9/;
6223: $txt=~tr/U-Z/0-5/;
6224: $txt=~tr/u-z/0-5/;
6225: $txt=~s/\D//g;
6226: if ($_64bit) { if ($txt > 2**32) { return -1; } }
6227: return int($txt);
6228: }
6229:
6230: sub numval2 {
6231: my $txt=shift;
6232: $txt=~tr/A-J/0-9/;
6233: $txt=~tr/a-j/0-9/;
6234: $txt=~tr/K-T/0-9/;
6235: $txt=~tr/k-t/0-9/;
6236: $txt=~tr/U-Z/0-5/;
6237: $txt=~tr/u-z/0-5/;
6238: $txt=~s/\D//g;
6239: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6240: my $total;
6241: foreach my $val (@txts) { $total+=$val; }
6242: if ($_64bit) { if ($total > 2**32) { return -1; } }
6243: return int($total);
6244: }
6245:
6246: sub numval3 {
6247: use integer;
6248: my $txt=shift;
6249: $txt=~tr/A-J/0-9/;
6250: $txt=~tr/a-j/0-9/;
6251: $txt=~tr/K-T/0-9/;
6252: $txt=~tr/k-t/0-9/;
6253: $txt=~tr/U-Z/0-5/;
6254: $txt=~tr/u-z/0-5/;
6255: $txt=~s/\D//g;
6256: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6257: my $total;
6258: foreach my $val (@txts) { $total+=$val; }
6259: if ($_64bit) { $total=(($total<<32)>>32); }
6260: return $total;
6261: }
6262:
6263: sub digest {
6264: my ($data)=@_;
6265: my $digest=&Digest::MD5::md5($data);
6266: my ($a,$b,$c,$d)=unpack("iiii",$digest);
6267: my ($e,$f);
6268: {
6269: use integer;
6270: $e=($a+$b);
6271: $f=($c+$d);
6272: if ($_64bit) {
6273: $e=(($e<<32)>>32);
6274: $f=(($f<<32)>>32);
6275: }
6276: }
6277: if (wantarray) {
6278: return ($e,$f);
6279: } else {
6280: my $g;
6281: {
6282: use integer;
6283: $g=($e+$f);
6284: if ($_64bit) {
6285: $g=(($g<<32)>>32);
6286: }
6287: }
6288: return $g;
6289: }
6290: }
6291:
6292: sub latest_rnd_algorithm_id {
6293: return '64bit5';
6294: }
6295:
6296: sub get_rand_alg {
6297: my ($courseid)=@_;
6298: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
6299: if ($courseid) {
6300: return $env{"course.$courseid.rndseed"};
6301: }
6302: return &latest_rnd_algorithm_id();
6303: }
6304:
6305: sub validCODE {
6306: my ($CODE)=@_;
6307: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
6308: return 0;
6309: }
6310:
6311: sub getCODE {
6312: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
6313: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
6314: defined($Apache::lonhomework::parsing_a_task) ) &&
6315: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
6316: return $Apache::lonhomework::history{'resource.CODE'};
6317: }
6318: return undef;
6319: }
6320:
6321: sub rndseed {
6322: my ($symb,$courseid,$domain,$username)=@_;
6323:
6324: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
6325: if (!$symb) {
6326: unless ($symb=$wsymb) { return time; }
6327: }
6328: if (!$courseid) { $courseid=$wcourseid; }
6329: if (!$domain) { $domain=$wdomain; }
6330: if (!$username) { $username=$wusername }
6331: my $which=&get_rand_alg();
6332: if (defined(&getCODE())) {
6333: if ($which eq '64bit5') {
6334: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
6335: } elsif ($which eq '64bit4') {
6336: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
6337: } else {
6338: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
6339: }
6340: } elsif ($which eq '64bit5') {
6341: return &rndseed_64bit5($symb,$courseid,$domain,$username);
6342: } elsif ($which eq '64bit4') {
6343: return &rndseed_64bit4($symb,$courseid,$domain,$username);
6344: } elsif ($which eq '64bit3') {
6345: return &rndseed_64bit3($symb,$courseid,$domain,$username);
6346: } elsif ($which eq '64bit2') {
6347: return &rndseed_64bit2($symb,$courseid,$domain,$username);
6348: } elsif ($which eq '64bit') {
6349: return &rndseed_64bit($symb,$courseid,$domain,$username);
6350: }
6351: return &rndseed_32bit($symb,$courseid,$domain,$username);
6352: }
6353:
6354: sub rndseed_32bit {
6355: my ($symb,$courseid,$domain,$username)=@_;
6356: {
6357: use integer;
6358: my $symbchck=unpack("%32C*",$symb) << 27;
6359: my $symbseed=numval($symb) << 22;
6360: my $namechck=unpack("%32C*",$username) << 17;
6361: my $nameseed=numval($username) << 12;
6362: my $domainseed=unpack("%32C*",$domain) << 7;
6363: my $courseseed=unpack("%32C*",$courseid);
6364: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
6365: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6366: #&Apache::lonxml::debug("rndseed :$num:$symb");
6367: if ($_64bit) { $num=(($num<<32)>>32); }
6368: return $num;
6369: }
6370: }
6371:
6372: sub rndseed_64bit {
6373: my ($symb,$courseid,$domain,$username)=@_;
6374: {
6375: use integer;
6376: my $symbchck=unpack("%32S*",$symb) << 21;
6377: my $symbseed=numval($symb) << 10;
6378: my $namechck=unpack("%32S*",$username);
6379:
6380: my $nameseed=numval($username) << 21;
6381: my $domainseed=unpack("%32S*",$domain) << 10;
6382: my $courseseed=unpack("%32S*",$courseid);
6383:
6384: my $num1=$symbchck+$symbseed+$namechck;
6385: my $num2=$nameseed+$domainseed+$courseseed;
6386: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6387: #&Apache::lonxml::debug("rndseed :$num:$symb");
6388: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6389: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6390: return "$num1,$num2";
6391: }
6392: }
6393:
6394: sub rndseed_64bit2 {
6395: my ($symb,$courseid,$domain,$username)=@_;
6396: {
6397: use integer;
6398: # strings need to be an even # of cahracters long, it it is odd the
6399: # last characters gets thrown away
6400: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6401: my $symbseed=numval($symb) << 10;
6402: my $namechck=unpack("%32S*",$username.' ');
6403:
6404: my $nameseed=numval($username) << 21;
6405: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6406: my $courseseed=unpack("%32S*",$courseid.' ');
6407:
6408: my $num1=$symbchck+$symbseed+$namechck;
6409: my $num2=$nameseed+$domainseed+$courseseed;
6410: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6411: #&Apache::lonxml::debug("rndseed :$num:$symb");
6412: return "$num1,$num2";
6413: }
6414: }
6415:
6416: sub rndseed_64bit3 {
6417: my ($symb,$courseid,$domain,$username)=@_;
6418: {
6419: use integer;
6420: # strings need to be an even # of cahracters long, it it is odd the
6421: # last characters gets thrown away
6422: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6423: my $symbseed=numval2($symb) << 10;
6424: my $namechck=unpack("%32S*",$username.' ');
6425:
6426: my $nameseed=numval2($username) << 21;
6427: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6428: my $courseseed=unpack("%32S*",$courseid.' ');
6429:
6430: my $num1=$symbchck+$symbseed+$namechck;
6431: my $num2=$nameseed+$domainseed+$courseseed;
6432: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6433: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
6434: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6435:
6436: return "$num1:$num2";
6437: }
6438: }
6439:
6440: sub rndseed_64bit4 {
6441: my ($symb,$courseid,$domain,$username)=@_;
6442: {
6443: use integer;
6444: # strings need to be an even # of cahracters long, it it is odd the
6445: # last characters gets thrown away
6446: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6447: my $symbseed=numval3($symb) << 10;
6448: my $namechck=unpack("%32S*",$username.' ');
6449:
6450: my $nameseed=numval3($username) << 21;
6451: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6452: my $courseseed=unpack("%32S*",$courseid.' ');
6453:
6454: my $num1=$symbchck+$symbseed+$namechck;
6455: my $num2=$nameseed+$domainseed+$courseseed;
6456: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6457: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
6458: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6459:
6460: return "$num1:$num2";
6461: }
6462: }
6463:
6464: sub rndseed_64bit5 {
6465: my ($symb,$courseid,$domain,$username)=@_;
6466: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
6467: return "$num1:$num2";
6468: }
6469:
6470: sub rndseed_CODE_64bit {
6471: my ($symb,$courseid,$domain,$username)=@_;
6472: {
6473: use integer;
6474: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6475: my $symbseed=numval2($symb);
6476: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6477: my $CODEseed=numval(&getCODE());
6478: my $courseseed=unpack("%32S*",$courseid.' ');
6479: my $num1=$symbseed+$CODEchck;
6480: my $num2=$CODEseed+$courseseed+$symbchck;
6481: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6482: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
6483: if ($_64bit) { $num1=(($num1<<32)>>32); }
6484: if ($_64bit) { $num2=(($num2<<32)>>32); }
6485: return "$num1:$num2";
6486: }
6487: }
6488:
6489: sub rndseed_CODE_64bit4 {
6490: my ($symb,$courseid,$domain,$username)=@_;
6491: {
6492: use integer;
6493: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6494: my $symbseed=numval3($symb);
6495: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6496: my $CODEseed=numval3(&getCODE());
6497: my $courseseed=unpack("%32S*",$courseid.' ');
6498: my $num1=$symbseed+$CODEchck;
6499: my $num2=$CODEseed+$courseseed+$symbchck;
6500: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6501: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
6502: if ($_64bit) { $num1=(($num1<<32)>>32); }
6503: if ($_64bit) { $num2=(($num2<<32)>>32); }
6504: return "$num1:$num2";
6505: }
6506: }
6507:
6508: sub rndseed_CODE_64bit5 {
6509: my ($symb,$courseid,$domain,$username)=@_;
6510: my $code = &getCODE();
6511: my ($num1,$num2)=&digest("$symb,$courseid,$code");
6512: return "$num1:$num2";
6513: }
6514:
6515: sub setup_random_from_rndseed {
6516: my ($rndseed)=@_;
6517: if ($rndseed =~/([,:])/) {
6518: my ($num1,$num2)=split(/[,:]/,$rndseed);
6519: &Math::Random::random_set_seed(abs($num1),abs($num2));
6520: } else {
6521: &Math::Random::random_set_seed_from_phrase($rndseed);
6522: }
6523: }
6524:
6525: sub latest_receipt_algorithm_id {
6526: return 'receipt2';
6527: }
6528:
6529: sub recunique {
6530: my $fucourseid=shift;
6531: my $unique;
6532: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6533: $unique=$env{"course.$fucourseid.internal.encseed"};
6534: } else {
6535: $unique=$perlvar{'lonReceipt'};
6536: }
6537: return unpack("%32C*",$unique);
6538: }
6539:
6540: sub recprefix {
6541: my $fucourseid=shift;
6542: my $prefix;
6543: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6544: $prefix=$env{"course.$fucourseid.internal.encpref"};
6545: } else {
6546: $prefix=$perlvar{'lonHostID'};
6547: }
6548: return unpack("%32C*",$prefix);
6549: }
6550:
6551: sub ireceipt {
6552: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
6553: my $cuname=unpack("%32C*",$funame);
6554: my $cudom=unpack("%32C*",$fudom);
6555: my $cucourseid=unpack("%32C*",$fucourseid);
6556: my $cusymb=unpack("%32C*",$fusymb);
6557: my $cunique=&recunique($fucourseid);
6558: my $cpart=unpack("%32S*",$part);
6559: my $return =&recprefix($fucourseid).'-';
6560: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
6561: $env{'request.state'} eq 'construct') {
6562: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
6563: " and ".($cpart%$cudom));
6564:
6565: $return.= ($cunique%$cuname+
6566: $cunique%$cudom+
6567: $cusymb%$cuname+
6568: $cusymb%$cudom+
6569: $cucourseid%$cuname+
6570: $cucourseid%$cudom+
6571: $cpart%$cuname+
6572: $cpart%$cudom);
6573: } else {
6574: $return.= ($cunique%$cuname+
6575: $cunique%$cudom+
6576: $cusymb%$cuname+
6577: $cusymb%$cudom+
6578: $cucourseid%$cuname+
6579: $cucourseid%$cudom);
6580: }
6581: return $return;
6582: }
6583:
6584: sub receipt {
6585: my ($part)=@_;
6586: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
6587: return &ireceipt($name,$domain,$courseid,$symb,$part);
6588: }
6589:
6590: # ------------------------------------------------------------ Serves up a file
6591: # returns either the contents of the file or
6592: # -1 if the file doesn't exist
6593: #
6594: # if the target is a file that was uploaded via DOCS,
6595: # a check will be made to see if a current copy exists on the local server,
6596: # if it does this will be served, otherwise a copy will be retrieved from
6597: # the home server for the course and stored in /home/httpd/html/userfiles on
6598: # the local server.
6599:
6600: sub getfile {
6601: my ($file) = @_;
6602: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6603: &repcopy($file);
6604: return &readfile($file);
6605: }
6606:
6607: sub repcopy_userfile {
6608: my ($file)=@_;
6609: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6610: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
6611: my ($cdom,$cnum,$filename) =
6612: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
6613: my ($info,$rtncode);
6614: my $uri="/uploaded/$cdom/$cnum/$filename";
6615: if (-e "$file") {
6616: my @fileinfo = stat($file);
6617: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
6618: if ($lwpresp ne 'ok') {
6619: if ($rtncode eq '404') {
6620: unlink($file);
6621: }
6622: #my $ua=new LWP::UserAgent;
6623: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6624: #my $response=$ua->request($request);
6625: #if ($response->is_success()) {
6626: # return $response->content;
6627: # } else {
6628: # return -1;
6629: # }
6630: return -1;
6631: }
6632: if ($info < $fileinfo[9]) {
6633: return 'ok';
6634: }
6635: $info = '';
6636: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6637: if ($lwpresp ne 'ok') {
6638: return -1;
6639: }
6640: } else {
6641: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6642: if ($lwpresp ne 'ok') {
6643: my $ua=new LWP::UserAgent;
6644: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6645: my $response=$ua->request($request);
6646: if ($response->is_success()) {
6647: $info=$response->content;
6648: } else {
6649: return -1;
6650: }
6651: }
6652: my @parts = ($cdom,$cnum);
6653: if ($filename =~ m|^(.+)/[^/]+$|) {
6654: push @parts, split(/\//,$1);
6655: }
6656: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
6657: foreach my $part (@parts) {
6658: $path .= '/'.$part;
6659: if (!-e $path) {
6660: mkdir($path,0770);
6661: }
6662: }
6663: }
6664: open(FILE,">$file");
6665: print FILE $info;
6666: close(FILE);
6667: return 'ok';
6668: }
6669:
6670: sub tokenwrapper {
6671: my $uri=shift;
6672: $uri=~s|^http\://([^/]+)||;
6673: $uri=~s|^/||;
6674: $env{'user.environment'}=~/\/([^\/]+)\.id/;
6675: my $token=$1;
6676: my (undef,$udom,$uname,$file)=split('/',$uri,4);
6677: if ($udom && $uname && $file) {
6678: $file=~s|(\?\.*)*$||;
6679: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
6680: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
6681: (($uri=~/\?/)?'&':'?').'token='.$token.
6682: '&tokenissued='.$perlvar{'lonHostID'};
6683: } else {
6684: return '/adm/notfound.html';
6685: }
6686: }
6687:
6688: sub getuploaded {
6689: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
6690: $uri=~s/^\///;
6691: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
6692: my $ua=new LWP::UserAgent;
6693: my $request=new HTTP::Request($reqtype,$uri);
6694: my $response=$ua->request($request);
6695: $$rtncode = $response->code;
6696: if (! $response->is_success()) {
6697: return 'failed';
6698: }
6699: if ($reqtype eq 'HEAD') {
6700: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
6701: } elsif ($reqtype eq 'GET') {
6702: $$info = $response->content;
6703: }
6704: return 'ok';
6705: }
6706:
6707: sub readfile {
6708: my $file = shift;
6709: if ( (! -e $file ) || ($file eq '') ) { return -1; };
6710: my $fh;
6711: open($fh,"<$file");
6712: my $a='';
6713: while (<$fh>) { $a .=$_; }
6714: return $a;
6715: }
6716:
6717: sub filelocation {
6718: my ($dir,$file) = @_;
6719: my $location;
6720: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
6721:
6722: if ($file =~ m-^/adm/-) {
6723: $file=~s-^/adm/wrapper/-/-;
6724: $file=~s-^/adm/coursedocs/showdoc/-/-;
6725: }
6726: if ($file=~m:^/~:) { # is a contruction space reference
6727: $location = $file;
6728: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
6729: } elsif ($file=~m:^/home/[^/]*/public_html/:) {
6730: # is a correct contruction space reference
6731: $location = $file;
6732: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
6733: my ($udom,$uname,$filename)=
6734: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
6735: my $home=&homeserver($uname,$udom);
6736: my $is_me=0;
6737: my @ids=¤t_machine_ids();
6738: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
6739: if ($is_me) {
6740: $location=&propath($udom,$uname).
6741: '/userfiles/'.$filename;
6742: } else {
6743: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
6744: $udom.'/'.$uname.'/'.$filename;
6745: }
6746: } else {
6747: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6748: $file=~s:^/res/:/:;
6749: if ( !( $file =~ m:^/:) ) {
6750: $location = $dir. '/'.$file;
6751: } else {
6752: $location = '/home/httpd/html/res'.$file;
6753: }
6754: }
6755: $location=~s://+:/:g; # remove duplicate /
6756: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
6757: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
6758: return $location;
6759: }
6760:
6761: sub hreflocation {
6762: my ($dir,$file)=@_;
6763: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
6764: $file=filelocation($dir,$file);
6765: } elsif ($file=~m-^/adm/-) {
6766: $file=~s-^/adm/wrapper/-/-;
6767: $file=~s-^/adm/coursedocs/showdoc/-/-;
6768: }
6769: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
6770: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
6771: } elsif ($file=~m-/home/(\w+)/public_html/-) {
6772: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
6773: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
6774: $file=~s-^/home/httpd/lonUsers/([^/]*)/./././([^/]*)/userfiles/
6775: -/uploaded/$1/$2/-x;
6776: }
6777: return $file;
6778: }
6779:
6780: sub current_machine_domains {
6781: my $hostname=$hostname{$perlvar{'lonHostID'}};
6782: my @domains;
6783: while( my($id, $name) = each(%hostname)) {
6784: # &logthis("-$id-$name-$hostname-");
6785: if ($hostname eq $name) {
6786: push(@domains,$hostdom{$id});
6787: }
6788: }
6789: return @domains;
6790: }
6791:
6792: sub current_machine_ids {
6793: my $hostname=$hostname{$perlvar{'lonHostID'}};
6794: my @ids;
6795: while( my($id, $name) = each(%hostname)) {
6796: # &logthis("-$id-$name-$hostname-");
6797: if ($hostname eq $name) {
6798: push(@ids,$id);
6799: }
6800: }
6801: return @ids;
6802: }
6803:
6804: # ------------------------------------------------------------- Declutters URLs
6805:
6806: sub declutter {
6807: my $thisfn=shift;
6808: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6809: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6810: $thisfn=~s/^\///;
6811: $thisfn=~s|^adm/wrapper/||;
6812: $thisfn=~s|^adm/coursedocs/showdoc/||;
6813: $thisfn=~s/^res\///;
6814: $thisfn=~s/\?.+$//;
6815: return $thisfn;
6816: }
6817:
6818: # ------------------------------------------------------------- Clutter up URLs
6819:
6820: sub clutter {
6821: my $thisfn='/'.&declutter(shift);
6822: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
6823: $thisfn='/res'.$thisfn;
6824: }
6825: if ($thisfn !~m|/adm|) {
6826: if ($thisfn =~ m|/ext/|) {
6827: $thisfn='/adm/wrapper'.$thisfn;
6828: } else {
6829: my ($ext) = ($thisfn =~ /\.(\w+)$/);
6830: my $embstyle=&Apache::loncommon::fileembstyle($ext);
6831: if ($embstyle eq 'ssi'
6832: || ($embstyle eq 'hdn')
6833: || ($embstyle eq 'rat')
6834: || ($embstyle eq 'prv')
6835: || ($embstyle eq 'ign')) {
6836: #do nothing with these
6837: } elsif (($embstyle eq 'img')
6838: || ($embstyle eq 'emb')
6839: || ($embstyle eq 'wrp')) {
6840: $thisfn='/adm/wrapper'.$thisfn;
6841: } elsif ($embstyle eq 'unk'
6842: && $thisfn!~/\.(sequence|page)$/) {
6843: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
6844: } else {
6845: # &logthis("Got a blank emb style");
6846: }
6847: }
6848: }
6849: return $thisfn;
6850: }
6851:
6852: sub freeze_escape {
6853: my ($value)=@_;
6854: if (ref($value)) {
6855: $value=&nfreeze($value);
6856: return '__FROZEN__'.&escape($value);
6857: }
6858: return &escape($value);
6859: }
6860:
6861:
6862: sub thaw_unescape {
6863: my ($value)=@_;
6864: if ($value =~ /^__FROZEN__/) {
6865: substr($value,0,10,undef);
6866: $value=&unescape($value);
6867: return &thaw($value);
6868: }
6869: return &unescape($value);
6870: }
6871:
6872: sub correct_line_ends {
6873: my ($result)=@_;
6874: $$result =~s/\r\n/\n/mg;
6875: $$result =~s/\r/\n/mg;
6876: }
6877: # ================================================================ Main Program
6878:
6879: sub goodbye {
6880: &logthis("Starting Shut down");
6881: #not converted to using infrastruture and probably shouldn't be
6882: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
6883: #converted
6884: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
6885: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
6886: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
6887: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
6888: #1.1 only
6889: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
6890: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
6891: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
6892: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
6893: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
6894: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
6895: &logthis(sprintf("%-20s is %s",'hits',$hits));
6896: &flushcourselogs();
6897: &logthis("Shutting down");
6898: }
6899:
6900: BEGIN {
6901: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
6902: unless ($readit) {
6903: {
6904: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
6905: open(my $config,"</etc/httpd/conf/loncapa.conf");
6906:
6907: while (my $configline=<$config>) {
6908: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
6909: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6910: chomp($varvalue);
6911: $perlvar{$varname}=$varvalue;
6912: }
6913: }
6914: close($config);
6915: }
6916: {
6917: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
6918:
6919: while (my $configline=<$config>) {
6920: if ($configline =~ /^[^\#]*PerlSetVar/) {
6921: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6922: chomp($varvalue);
6923: $perlvar{$varname}=$varvalue;
6924: }
6925: }
6926: close($config);
6927: }
6928:
6929: # ------------------------------------------------------------ Read domain file
6930: {
6931: %domaindescription = ();
6932: %domain_auth_def = ();
6933: %domain_auth_arg_def = ();
6934: my $fh;
6935: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
6936: while (<$fh>) {
6937: next if (/^(\#|\s*$)/);
6938: # next if /^\#/;
6939: chomp;
6940: my ($domain, $domain_description, $def_auth, $def_auth_arg,
6941: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$_);
6942: $domain_auth_def{$domain}=$def_auth;
6943: $domain_auth_arg_def{$domain}=$def_auth_arg;
6944: $domaindescription{$domain}=$domain_description;
6945: $domain_lang_def{$domain}=$def_lang;
6946: $domain_city{$domain}=$city;
6947: $domain_longi{$domain}=$longi;
6948: $domain_lati{$domain}=$lati;
6949: $domain_primary{$domain}=$primary;
6950:
6951: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
6952: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
6953: }
6954: }
6955: close ($fh);
6956: }
6957:
6958:
6959: # ------------------------------------------------------------- Read hosts file
6960: {
6961: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
6962:
6963: while (my $configline=<$config>) {
6964: next if ($configline =~ /^(\#|\s*$)/);
6965: chomp($configline);
6966: my ($id,$domain,$role,$name)=split(/:/,$configline);
6967: $name=~s/\s//g;
6968: if ($id && $domain && $role && $name) {
6969: $hostname{$id}=$name;
6970: $hostdom{$id}=$domain;
6971: if ($role eq 'library') { $libserv{$id}=$name; }
6972: }
6973: }
6974: close($config);
6975: # FIXME: dev server don't want this, production servers _do_ want this
6976: #&get_iphost();
6977: }
6978:
6979: sub get_iphost {
6980: if (%iphost) { return %iphost; }
6981: my %name_to_ip;
6982: foreach my $id (keys(%hostname)) {
6983: my $name=$hostname{$id};
6984: my $ip;
6985: if (!exists($name_to_ip{$name})) {
6986: $ip = gethostbyname($name);
6987: if (!$ip || length($ip) ne 4) {
6988: &logthis("Skipping host $id name $name no IP found\n");
6989: next;
6990: }
6991: $ip=inet_ntoa($ip);
6992: $name_to_ip{$name} = $ip;
6993: } else {
6994: $ip = $name_to_ip{$name};
6995: }
6996: push(@{$iphost{$ip}},$id);
6997: }
6998: return %iphost;
6999: }
7000:
7001: # ------------------------------------------------------ Read spare server file
7002: {
7003: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
7004:
7005: while (my $configline=<$config>) {
7006: chomp($configline);
7007: if ($configline) {
7008: $spareid{$configline}=1;
7009: }
7010: }
7011: close($config);
7012: }
7013: # ------------------------------------------------------------ Read permissions
7014: {
7015: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
7016:
7017: while (my $configline=<$config>) {
7018: chomp($configline);
7019: if ($configline) {
7020: my ($role,$perm)=split(/ /,$configline);
7021: if ($perm ne '') { $pr{$role}=$perm; }
7022: }
7023: }
7024: close($config);
7025: }
7026:
7027: # -------------------------------------------- Read plain texts for permissions
7028: {
7029: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
7030:
7031: while (my $configline=<$config>) {
7032: chomp($configline);
7033: if ($configline) {
7034: my ($short,@plain)=split(/:/,$configline);
7035: %{$prp{$short}} = ();
7036: if (@plain > 0) {
7037: $prp{$short}{'std'} = $plain[0];
7038: for (my $i=1; $i<@plain; $i++) {
7039: $prp{$short}{'alt'.$i} = $plain[$i];
7040: }
7041: }
7042: }
7043: }
7044: close($config);
7045: }
7046:
7047: # ---------------------------------------------------------- Read package table
7048: {
7049: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
7050:
7051: while (my $configline=<$config>) {
7052: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
7053: chomp($configline);
7054: my ($short,$plain)=split(/:/,$configline);
7055: my ($pack,$name)=split(/\&/,$short);
7056: if ($plain ne '') {
7057: $packagetab{$pack.'&'.$name.'&name'}=$name;
7058: $packagetab{$short}=$plain;
7059: }
7060: }
7061: close($config);
7062: }
7063:
7064: # ------------- set up temporary directory
7065: {
7066: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
7067:
7068: }
7069:
7070: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
7071:
7072: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
7073: $dumpcount=0;
7074:
7075: &logtouch();
7076: &logthis('<font color="yellow">INFO: Read configuration</font>');
7077: $readit=1;
7078: {
7079: use integer;
7080: my $test=(2**32)+1;
7081: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
7082: &logthis(" Detected 64bit platform ($_64bit)");
7083: }
7084: }
7085: }
7086:
7087: 1;
7088: __END__
7089:
7090: =pod
7091:
7092: =head1 NAME
7093:
7094: Apache::lonnet - Subroutines to ask questions about things in the network.
7095:
7096: =head1 SYNOPSIS
7097:
7098: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
7099:
7100: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
7101:
7102: Common parameters:
7103:
7104: =over 4
7105:
7106: =item *
7107:
7108: $uname : an internal username (if $cname expecting a course Id specifically)
7109:
7110: =item *
7111:
7112: $udom : a domain (if $cdom expecting a course's domain specifically)
7113:
7114: =item *
7115:
7116: $symb : a resource instance identifier
7117:
7118: =item *
7119:
7120: $namespace : the name of a .db file that contains the data needed or
7121: being set.
7122:
7123: =back
7124:
7125: =head1 OVERVIEW
7126:
7127: lonnet provides subroutines which interact with the
7128: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
7129: about classes, users, and resources.
7130:
7131: For many of these objects you can also use this to store data about
7132: them or modify them in various ways.
7133:
7134: =head2 Symbs
7135:
7136: To identify a specific instance of a resource, LON-CAPA uses symbols
7137: or "symbs"X<symb>. These identifiers are built from the URL of the
7138: map, the resource number of the resource in the map, and the URL of
7139: the resource itself. The latter is somewhat redundant, but might help
7140: if maps change.
7141:
7142: An example is
7143:
7144: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
7145:
7146: The respective map entry is
7147:
7148: <resource id="19" src="/res/msu/korte/tests/part12.problem"
7149: title="Problem 2">
7150: </resource>
7151:
7152: Symbs are used by the random number generator, as well as to store and
7153: restore data specific to a certain instance of for example a problem.
7154:
7155: =head2 Storing And Retrieving Data
7156:
7157: X<store()>X<cstore()>X<restore()>Three of the most important functions
7158: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
7159: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
7160: is is the non-critical message twin of cstore. These functions are for
7161: handlers to store a perl hash to a user's permanent data space in an
7162: easy manner, and to retrieve it again on another call. It is expected
7163: that a handler would use this once at the beginning to retrieve data,
7164: and then again once at the end to send only the new data back.
7165:
7166: The data is stored in the user's data directory on the user's
7167: homeserver under the ID of the course.
7168:
7169: The hash that is returned by restore will have all of the previous
7170: value for all of the elements of the hash.
7171:
7172: Example:
7173:
7174: #creating a hash
7175: my %hash;
7176: $hash{'foo'}='bar';
7177:
7178: #storing it
7179: &Apache::lonnet::cstore(\%hash);
7180:
7181: #changing a value
7182: $hash{'foo'}='notbar';
7183:
7184: #adding a new value
7185: $hash{'bar'}='foo';
7186: &Apache::lonnet::cstore(\%hash);
7187:
7188: #retrieving the hash
7189: my %history=&Apache::lonnet::restore();
7190:
7191: #print the hash
7192: foreach my $key (sort(keys(%history))) {
7193: print("\%history{$key} = $history{$key}");
7194: }
7195:
7196: Will print out:
7197:
7198: %history{1:foo} = bar
7199: %history{1:keys} = foo:timestamp
7200: %history{1:timestamp} = 990455579
7201: %history{2:bar} = foo
7202: %history{2:foo} = notbar
7203: %history{2:keys} = foo:bar:timestamp
7204: %history{2:timestamp} = 990455580
7205: %history{bar} = foo
7206: %history{foo} = notbar
7207: %history{timestamp} = 990455580
7208: %history{version} = 2
7209:
7210: Note that the special hash entries C<keys>, C<version> and
7211: C<timestamp> were added to the hash. C<version> will be equal to the
7212: total number of versions of the data that have been stored. The
7213: C<timestamp> attribute will be the UNIX time the hash was
7214: stored. C<keys> is available in every historical section to list which
7215: keys were added or changed at a specific historical revision of a
7216: hash.
7217:
7218: B<Warning>: do not store the hash that restore returns directly. This
7219: will cause a mess since it will restore the historical keys as if the
7220: were new keys. I.E. 1:foo will become 1:1:foo etc.
7221:
7222: Calling convention:
7223:
7224: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
7225: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
7226:
7227: For more detailed information, see lonnet specific documentation.
7228:
7229: =head1 RETURN MESSAGES
7230:
7231: =over 4
7232:
7233: =item * B<con_lost>: unable to contact remote host
7234:
7235: =item * B<con_delayed>: unable to contact remote host, message will be delivered
7236: when the connection is brought back up
7237:
7238: =item * B<con_failed>: unable to contact remote host and unable to save message
7239: for later delivery
7240:
7241: =item * B<error:>: an error a occured, a description of the error follows the :
7242:
7243: =item * B<no_such_host>: unable to fund a host associated with the user/domain
7244: that was requested
7245:
7246: =back
7247:
7248: =head1 PUBLIC SUBROUTINES
7249:
7250: =head2 Session Environment Functions
7251:
7252: =over 4
7253:
7254: =item *
7255: X<appenv()>
7256: B<appenv(%hash)>: the value of %hash is written to
7257: the user envirnoment file, and will be restored for each access this
7258: user makes during this session, also modifies the %env for the current
7259: process
7260:
7261: =item *
7262: X<delenv()>
7263: B<delenv($regexp)>: removes all items from the session
7264: environment file that matches the regular expression in $regexp. The
7265: values are also delted from the current processes %env.
7266:
7267: =back
7268:
7269: =head2 User Information
7270:
7271: =over 4
7272:
7273: =item *
7274: X<queryauthenticate()>
7275: B<queryauthenticate($uname,$udom)>: try to determine user's current
7276: authentication scheme
7277:
7278: =item *
7279: X<authenticate()>
7280: B<authenticate($uname,$upass,$udom)>: try to
7281: authenticate user from domain's lib servers (first use the current
7282: one). C<$upass> should be the users password.
7283:
7284: =item *
7285: X<homeserver()>
7286: B<homeserver($uname,$udom)>: find the server which has
7287: the user's directory and files (there must be only one), this caches
7288: the answer, and also caches if there is a borken connection.
7289:
7290: =item *
7291: X<idget()>
7292: B<idget($udom,@ids)>: find the usernames behind a list of IDs
7293: (IDs are a unique resource in a domain, there must be only 1 ID per
7294: username, and only 1 username per ID in a specific domain) (returns
7295: hash: id=>name,id=>name)
7296:
7297: =item *
7298: X<idrget()>
7299: B<idrget($udom,@unames)>: find the IDs behind a list of
7300: usernames (returns hash: name=>id,name=>id)
7301:
7302: =item *
7303: X<idput()>
7304: B<idput($udom,%ids)>: store away a list of names and associated IDs
7305:
7306: =item *
7307: X<rolesinit()>
7308: B<rolesinit($udom,$username,$authhost)>: get user privileges
7309:
7310: =item *
7311: X<getsection()>
7312: B<getsection($udom,$uname,$cname)>: finds the section of student in the
7313: course $cname, return section name/number or '' for "not in course"
7314: and '-1' for "no section"
7315:
7316: =item *
7317: X<userenvironment()>
7318: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
7319: passed in @what from the requested user's environment, returns a hash
7320:
7321: =back
7322:
7323: =head2 User Roles
7324:
7325: =over 4
7326:
7327: =item *
7328:
7329: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
7330: actions
7331: F: full access
7332: U,I,K: authentication modes (cxx only)
7333: '': forbidden
7334: 1: user needs to choose course
7335: 2: browse allowed
7336:
7337: =item *
7338:
7339: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
7340: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
7341: and course level
7342:
7343: =item *
7344:
7345: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
7346: explanation of a user role term
7347:
7348: =back
7349:
7350: =head2 User Modification
7351:
7352: =over 4
7353:
7354: =item *
7355:
7356: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
7357: user for the level given by URL. Optional start and end dates (leave empty
7358: string or zero for "no date")
7359:
7360: =item *
7361:
7362: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
7363: change a users, password, possible return values are: ok,
7364: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
7365: refused
7366:
7367: =item *
7368:
7369: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
7370:
7371: =item *
7372:
7373: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
7374: modify user
7375:
7376: =item *
7377:
7378: modifystudent
7379:
7380: modify a students enrollment and identification information.
7381: The course id is resolved based on the current users environment.
7382: This means the envoking user must be a course coordinator or otherwise
7383: associated with a course.
7384:
7385: This call is essentially a wrapper for lonnet::modifyuser and
7386: lonnet::modify_student_enrollment
7387:
7388: Inputs:
7389:
7390: =over 4
7391:
7392: =item B<$udom> Students loncapa domain
7393:
7394: =item B<$uname> Students loncapa login name
7395:
7396: =item B<$uid> Students id/student number
7397:
7398: =item B<$umode> Students authentication mode
7399:
7400: =item B<$upass> Students password
7401:
7402: =item B<$first> Students first name
7403:
7404: =item B<$middle> Students middle name
7405:
7406: =item B<$last> Students last name
7407:
7408: =item B<$gene> Students generation
7409:
7410: =item B<$usec> Students section in course
7411:
7412: =item B<$end> Unix time of the roles expiration
7413:
7414: =item B<$start> Unix time of the roles start date
7415:
7416: =item B<$forceid> If defined, allow $uid to be changed
7417:
7418: =item B<$desiredhome> server to use as home server for student
7419:
7420: =back
7421:
7422: =item *
7423:
7424: modify_student_enrollment
7425:
7426: Change a students enrollment status in a class. The environment variable
7427: 'role.request.course' must be defined for this function to proceed.
7428:
7429: Inputs:
7430:
7431: =over 4
7432:
7433: =item $udom, students domain
7434:
7435: =item $uname, students name
7436:
7437: =item $uid, students user id
7438:
7439: =item $first, students first name
7440:
7441: =item $middle
7442:
7443: =item $last
7444:
7445: =item $gene
7446:
7447: =item $usec
7448:
7449: =item $end
7450:
7451: =item $start
7452:
7453: =back
7454:
7455:
7456: =item *
7457:
7458: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
7459: custom role; give a custom role to a user for the level given by URL. Specify
7460: name and domain of role author, and role name
7461:
7462: =item *
7463:
7464: revokerole($udom,$uname,$url,$role) : revoke a role for url
7465:
7466: =item *
7467:
7468: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
7469:
7470: =back
7471:
7472: =head2 Course Infomation
7473:
7474: =over 4
7475:
7476: =item *
7477:
7478: coursedescription($courseid) : returns a hash of information about the
7479: specified course id, including all environment settings for the
7480: course, the description of the course will be in the hash under the
7481: key 'description'
7482:
7483: =item *
7484:
7485: resdata($name,$domain,$type,@which) : request for current parameter
7486: setting for a specific $type, where $type is either 'course' or 'user',
7487: @what should be a list of parameters to ask about. This routine caches
7488: answers for 5 minutes.
7489:
7490: =back
7491:
7492: =head2 Course Modification
7493:
7494: =over 4
7495:
7496: =item *
7497:
7498: writecoursepref($courseid,%prefs) : write preferences (environment
7499: database) for a course
7500:
7501: =item *
7502:
7503: createcourse($udom,$description,$url) : make/modify course
7504:
7505: =back
7506:
7507: =head2 Resource Subroutines
7508:
7509: =over 4
7510:
7511: =item *
7512:
7513: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
7514:
7515: =item *
7516:
7517: repcopy($filename) : subscribes to the requested file, and attempts to
7518: replicate from the owning library server, Might return
7519: 'unavailable', 'not_found', 'forbidden', 'ok', or
7520: 'bad_request', also attempts to grab the metadata for the
7521: resource. Expects the local filesystem pathname
7522: (/home/httpd/html/res/....)
7523:
7524: =back
7525:
7526: =head2 Resource Information
7527:
7528: =over 4
7529:
7530: =item *
7531:
7532: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
7533: a vairety of different possible values, $varname should be a request
7534: string, and the other parameters can be used to specify who and what
7535: one is asking about.
7536:
7537: Possible values for $varname are environment.lastname (or other item
7538: from the envirnment hash), user.name (or someother aspect about the
7539: user), resource.0.maxtries (or some other part and parameter of a
7540: resource)
7541:
7542: =item *
7543:
7544: directcondval($number) : get current value of a condition; reads from a state
7545: string
7546:
7547: =item *
7548:
7549: condval($condidx) : value of condition index based on state
7550:
7551: =item *
7552:
7553: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
7554: resource's metadata, $what should be either a specific key, or either
7555: 'keys' (to get a list of possible keys) or 'packages' to get a list of
7556: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
7557:
7558: this function automatically caches all requests
7559:
7560: =item *
7561:
7562: metadata_query($query,$custom,$customshow) : make a metadata query against the
7563: network of library servers; returns file handle of where SQL and regex results
7564: will be stored for query
7565:
7566: =item *
7567:
7568: symbread($filename) : return symbolic list entry (filename argument optional);
7569: returns the data handle
7570:
7571: =item *
7572:
7573: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
7574: a possible symb for the URL in $thisfn, and if is an encryypted
7575: resource that the user accessed using /enc/ returns a 1 on success, 0
7576: on failure, user must be in a course, as it assumes the existance of
7577: the course initial hash, and uses $env('request.course.id'}
7578:
7579:
7580: =item *
7581:
7582: symbclean($symb) : removes versions numbers from a symb, returns the
7583: cleaned symb
7584:
7585: =item *
7586:
7587: is_on_map($uri) : checks if the $uri is somewhere on the current
7588: course map, user must be in a course for it to work.
7589:
7590: =item *
7591:
7592: numval($salt) : return random seed value (addend for rndseed)
7593:
7594: =item *
7595:
7596: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
7597: a random seed, all arguments are optional, if they aren't sent it uses the
7598: environment to derive them. Note: if symb isn't sent and it can't get one
7599: from &symbread it will use the current time as its return value
7600:
7601: =item *
7602:
7603: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
7604: unfakeable, receipt
7605:
7606: =item *
7607:
7608: receipt() : API to ireceipt working off of env values; given out to users
7609:
7610: =item *
7611:
7612: countacc($url) : count the number of accesses to a given URL
7613:
7614: =item *
7615:
7616: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
7617:
7618: =item *
7619:
7620: checkin($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 $tcrsid)
7621:
7622: =item *
7623:
7624: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
7625:
7626: =item *
7627:
7628: devalidate($symb) : devalidate temporary spreadsheet calculations,
7629: forcing spreadsheet to reevaluate the resource scores next time.
7630:
7631: =back
7632:
7633: =head2 Storing/Retreiving Data
7634:
7635: =over 4
7636:
7637: =item *
7638:
7639: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
7640: for this url; hashref needs to be given and should be a \%hashname; the
7641: remaining args aren't required and if they aren't passed or are '' they will
7642: be derived from the env
7643:
7644: =item *
7645:
7646: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
7647: uses critical subroutine
7648:
7649: =item *
7650:
7651: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
7652: all args are optional
7653:
7654: =item *
7655:
7656: dumpstore($namespace,$udom,$uname,$regexp,$range) :
7657: dumps the complete (or key matching regexp) namespace into a hash
7658: ($udom, $uname, $regexp, $range are optional) for a namespace that is
7659: normally &store()ed into
7660:
7661: $range should be either an integer '100' (give me the first 100
7662: matching records)
7663: or be two integers sperated by a - with no spaces
7664: '30-50' (give me the 30th through the 50th matching
7665: records)
7666:
7667:
7668: =item *
7669:
7670: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
7671: replaces a &store() version of data with a replacement set of data
7672: for a particular resource in a namespace passed in the $storehash hash
7673: reference
7674:
7675: =item *
7676:
7677: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
7678: works very similar to store/cstore, but all data is stored in a
7679: temporary location and can be reset using tmpreset, $storehash should
7680: be a hash reference, returns nothing on success
7681:
7682: =item *
7683:
7684: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
7685: similar to restore, but all data is stored in a temporary location and
7686: can be reset using tmpreset. Returns a hash of values on success,
7687: error string otherwise.
7688:
7689: =item *
7690:
7691: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
7692: deltes all keys for $symb form the temporary storage hash.
7693:
7694: =item *
7695:
7696: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7697: reference filled in from namesp ($udom and $uname are optional)
7698:
7699: =item *
7700:
7701: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
7702: namesp ($udom and $uname are optional)
7703:
7704: =item *
7705:
7706: dump($namespace,$udom,$uname,$regexp,$range) :
7707: dumps the complete (or key matching regexp) namespace into a hash
7708: ($udom, $uname, $regexp, $range are optional)
7709:
7710: $range should be either an integer '100' (give me the first 100
7711: matching records)
7712: or be two integers sperated by a - with no spaces
7713: '30-50' (give me the 30th through the 50th matching
7714: records)
7715: =item *
7716:
7717: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
7718: $store can be a scalar, an array reference, or if the amount to be
7719: incremented is > 1, a hash reference.
7720:
7721: ($udom and $uname are optional)
7722:
7723: =item *
7724:
7725: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
7726: ($udom and $uname are optional)
7727:
7728: =item *
7729:
7730: cput($namespace,$storehash,$udom,$uname) : critical put
7731: ($udom and $uname are optional)
7732:
7733: =item *
7734:
7735: newput($namespace,$storehash,$udom,$uname) :
7736:
7737: Attempts to store the items in the $storehash, but only if they don't
7738: currently exist, if this succeeds you can be certain that you have
7739: successfully created a new key value pair in the $namespace db.
7740:
7741:
7742: Args:
7743: $namespace: name of database to store values to
7744: $storehash: hashref to store to the db
7745: $udom: (optional) domain of user containing the db
7746: $uname: (optional) name of user caontaining the db
7747:
7748: Returns:
7749: 'ok' -> succeeded in storing all keys of $storehash
7750: 'key_exists: <key>' -> failed to anything out of $storehash, as at
7751: least <key> already existed in the db (other
7752: requested keys may also already exist)
7753: 'error: <msg>' -> unable to tie the DB or other erorr occured
7754: 'con_lost' -> unable to contact request server
7755: 'refused' -> action was not allowed by remote machine
7756:
7757:
7758: =item *
7759:
7760: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7761: reference filled in from namesp (encrypts the return communication)
7762: ($udom and $uname are optional)
7763:
7764: =item *
7765:
7766: log($udom,$name,$home,$message) : write to permanent log for user; use
7767: critical subroutine
7768:
7769: =back
7770:
7771: =head2 Network Status Functions
7772:
7773: =over 4
7774:
7775: =item *
7776:
7777: dirlist($uri) : return directory list based on URI
7778:
7779: =item *
7780:
7781: spareserver() : find server with least workload from spare.tab
7782:
7783: =back
7784:
7785: =head2 Apache Request
7786:
7787: =over 4
7788:
7789: =item *
7790:
7791: ssi($url,%hash) : server side include, does a complete request cycle on url to
7792: localhost, posts hash
7793:
7794: =back
7795:
7796: =head2 Data to String to Data
7797:
7798: =over 4
7799:
7800: =item *
7801:
7802: hash2str(%hash) : convert a hash into a string complete with escaping and '='
7803: and '&' separators, supports elements that are arrayrefs and hashrefs
7804:
7805: =item *
7806:
7807: hashref2str($hashref) : convert a hashref into a string complete with
7808: escaping and '=' and '&' separators, supports elements that are
7809: arrayrefs and hashrefs
7810:
7811: =item *
7812:
7813: arrayref2str($arrayref) : convert an arrayref into a string complete
7814: with escaping and '&' separators, supports elements that are arrayrefs
7815: and hashrefs
7816:
7817: =item *
7818:
7819: str2hash($string) : convert string to hash using unescaping and
7820: splitting on '=' and '&', supports elements that are arrayrefs and
7821: hashrefs
7822:
7823: =item *
7824:
7825: str2array($string) : convert string to hash using unescaping and
7826: splitting on '&', supports elements that are arrayrefs and hashrefs
7827:
7828: =back
7829:
7830: =head2 Logging Routines
7831:
7832: =over 4
7833:
7834: These routines allow one to make log messages in the lonnet.log and
7835: lonnet.perm logfiles.
7836:
7837: =item *
7838:
7839: logtouch() : make sure the logfile, lonnet.log, exists
7840:
7841: =item *
7842:
7843: logthis() : append message to the normal lonnet.log file, it gets
7844: preiodically rolled over and deleted.
7845:
7846: =item *
7847:
7848: logperm() : append a permanent message to lonnet.perm.log, this log
7849: file never gets deleted by any automated portion of the system, only
7850: messages of critical importance should go in here.
7851:
7852: =back
7853:
7854: =head2 General File Helper Routines
7855:
7856: =over 4
7857:
7858: =item *
7859:
7860: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
7861: (a) files in /uploaded
7862: (i) If a local copy of the file exists -
7863: compares modification date of local copy with last-modified date for
7864: definitive version stored on home server for course. If local copy is
7865: stale, requests a new version from the home server and stores it.
7866: If the original has been removed from the home server, then local copy
7867: is unlinked.
7868: (ii) If local copy does not exist -
7869: requests the file from the home server and stores it.
7870:
7871: If $caller is 'uploadrep':
7872: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
7873: for request for files originally uploaded via DOCS.
7874: - returns 'ok' if fresh local copy now available, -1 otherwise.
7875:
7876: Otherwise:
7877: This indicates a call from the content generation phase of the request.
7878: - returns the entire contents of the file or -1.
7879:
7880: (b) files in /res
7881: - returns the entire contents of a file or -1;
7882: it properly subscribes to and replicates the file if neccessary.
7883:
7884:
7885: =item *
7886:
7887: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
7888: reference
7889:
7890: returns either a stat() list of data about the file or an empty list
7891: if the file doesn't exist or couldn't find out about it (connection
7892: problems or user unknown)
7893:
7894: =item *
7895:
7896: filelocation($dir,$file) : returns file system location of a file
7897: based on URI; meant to be "fairly clean" absolute reference, $dir is a
7898: directory that relative $file lookups are to looked in ($dir of /a/dir
7899: and a file of ../bob will become /a/bob)
7900:
7901: =item *
7902:
7903: hreflocation($dir,$file) : returns file system location or a URL; same as
7904: filelocation except for hrefs
7905:
7906: =item *
7907:
7908: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
7909:
7910: =back
7911:
7912: =head2 Usererfile file routines (/uploaded*)
7913:
7914: =over 4
7915:
7916: =item *
7917:
7918: userfileupload(): main rotine for putting a file in a user or course's
7919: filespace, arguments are,
7920:
7921: formname - required - this is the name of the element in $env where the
7922: filename, and the contents of the file to create/modifed exist
7923: the filename is in $env{'form.'.$formname.'.filename'} and the
7924: contents of the file is located in $env{'form.'.$formname}
7925: coursedoc - if true, store the file in the course of the active role
7926: of the current user
7927: subdir - required - subdirectory to put the file in under ../userfiles/
7928: if undefined, it will be placed in "unknown"
7929:
7930: (This routine calls clean_filename() to remove any dangerous
7931: characters from the filename, and then calls finuserfileupload() to
7932: complete the transaction)
7933:
7934: returns either the url of the uploaded file (/uploaded/....) if successful
7935: and /adm/notfound.html if unsuccessful
7936:
7937: =item *
7938:
7939: clean_filename(): routine for cleaing a filename up for storage in
7940: userfile space, argument is:
7941:
7942: filename - proposed filename
7943:
7944: returns: the new clean filename
7945:
7946: =item *
7947:
7948: finishuserfileupload(): routine that creaes and sends the file to
7949: userspace, probably shouldn't be called directly
7950:
7951: docuname: username or courseid of destination for the file
7952: docudom: domain of user/course of destination for the file
7953: formname: same as for userfileupload()
7954: fname: filename (inculding subdirectories) for the file
7955:
7956: returns either the url of the uploaded file (/uploaded/....) if successful
7957: and /adm/notfound.html if unsuccessful
7958:
7959: =item *
7960:
7961: renameuserfile(): renames an existing userfile to a new name
7962:
7963: Args:
7964: docuname: username or courseid of destination for the file
7965: docudom: domain of user/course of destination for the file
7966: old: current file name (including any subdirs under userfiles)
7967: new: desired file name (including any subdirs under userfiles)
7968:
7969: =item *
7970:
7971: mkdiruserfile(): creates a directory is a userfiles dir
7972:
7973: Args:
7974: docuname: username or courseid of destination for the file
7975: docudom: domain of user/course of destination for the file
7976: dir: dir to create (including any subdirs under userfiles)
7977:
7978: =item *
7979:
7980: removeuserfile(): removes a file that exists in userfiles
7981:
7982: Args:
7983: docuname: username or courseid of destination for the file
7984: docudom: domain of user/course of destination for the file
7985: fname: filname to delete (including any subdirs under userfiles)
7986:
7987: =item *
7988:
7989: removeuploadedurl(): convience function for removeuserfile()
7990:
7991: Args:
7992: url: a full /uploaded/... url to delete
7993:
7994: =item *
7995:
7996: get_portfile_permissions():
7997: Args:
7998: domain: domain of user or course contain the portfolio files
7999: user: name of user or num of course contain the portfolio files
8000: Returns:
8001: hashref of a dump of the proper file_permissions.db
8002:
8003:
8004: =item *
8005:
8006: get_access_controls():
8007:
8008: Args:
8009: current_permissions: the hash ref returned from get_portfile_permissions()
8010: group: (optional) the group you want the files associated with
8011: file: (optional) the file you want access info on
8012:
8013: Returns:
8014: a hash (keys are file names) of hashes containing
8015: keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
8016: values are XML containing access control settings (see below)
8017:
8018: Internal notes:
8019:
8020: access controls are stored in file_permissions.db as key=value pairs.
8021: key -> path to file/file_name\0uniqueID:scope_end_start
8022: where scope -> public,guest,course,group,domains or users.
8023: end -> UNIX time for end of access (0 -> no end date)
8024: start -> UNIX time for start of access
8025:
8026: value -> XML description of access control
8027: <scope type=""> (type =1 of: public,guest,course,group,domains,users">
8028: <start></start>
8029: <end></end>
8030:
8031: <password></password> for scope type = guest
8032:
8033: <domain></domain> for scope type = course or group
8034: <number></number>
8035: <roles id="">
8036: <role></role>
8037: <access></access>
8038: <section></section>
8039: <group></group>
8040: </roles>
8041:
8042: <dom></dom> for scope type = domains
8043:
8044: <users> for scope type = users
8045: <user>
8046: <uname></uname>
8047: <udom></udom>
8048: </user>
8049: </users>
8050: </scope>
8051:
8052: Access data is also aggregated for each file in an additional key=value pair:
8053: key -> path to file/file_name\0accesscontrol
8054: value -> reference to hash
8055: hash contains key = value pairs
8056: where key = uniqueID:scope_end_start
8057: value = UNIX time record was last updated
8058:
8059: Used to improve speed of look-ups of access controls for each file.
8060:
8061: Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
8062:
8063: parse_access_controls():
8064:
8065: Parses XML of an access control record
8066: Args
8067: 1. Text string (XML) of access comtrol record
8068:
8069: Returns:
8070: 1. Hash of access control settings.
8071:
8072: modify_access_controls():
8073:
8074: Modifies access controls for a portfolio file
8075: Args
8076: 1. file name
8077: 2. reference to hash of required changes,
8078: 3. domain
8079: 4. username
8080: where domain,username are the domain of the portfolio owner
8081: (either a user or a course)
8082:
8083: Returns:
8084: 1. result of additions or updates ('ok' or 'error', with error message).
8085: 2. result of deletions ('ok' or 'error', with error message).
8086: 3. reference to hash of any new or updated access controls.
8087: 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
8088: key = integer (inbound ID)
8089: value = uniqueID
8090:
8091: =back
8092:
8093: =head2 HTTP Helper Routines
8094:
8095: =over 4
8096:
8097: =item *
8098:
8099: escape() : unpack non-word characters into CGI-compatible hex codes
8100:
8101: =item *
8102:
8103: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
8104:
8105: =back
8106:
8107: =head1 PRIVATE SUBROUTINES
8108:
8109: =head2 Underlying communication routines (Shouldn't call)
8110:
8111: =over 4
8112:
8113: =item *
8114:
8115: subreply() : tries to pass a message to lonc, returns con_lost if incapable
8116:
8117: =item *
8118:
8119: reply() : uses subreply to send a message to remote machine, logs all failures
8120:
8121: =item *
8122:
8123: critical() : passes a critical message to another server; if cannot
8124: get through then place message in connection buffer directory and
8125: returns con_delayed, if incapable of saving message, returns
8126: con_failed
8127:
8128: =item *
8129:
8130: reconlonc() : tries to reconnect lonc client processes.
8131:
8132: =back
8133:
8134: =head2 Resource Access Logging
8135:
8136: =over 4
8137:
8138: =item *
8139:
8140: flushcourselogs() : flush (save) buffer logs and access logs
8141:
8142: =item *
8143:
8144: courselog($what) : save message for course in hash
8145:
8146: =item *
8147:
8148: courseacclog($what) : save message for course using &courselog(). Perform
8149: special processing for specific resource types (problems, exams, quizzes, etc).
8150:
8151: =item *
8152:
8153: goodbye() : flush course logs and log shutting down; it is called in srm.conf
8154: as a PerlChildExitHandler
8155:
8156: =back
8157:
8158: =head2 Other
8159:
8160: =over 4
8161:
8162: =item *
8163:
8164: symblist($mapname,%newhash) : update symbolic storage links
8165:
8166: =back
8167:
8168: =cut
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