1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.779 2006/09/15 07:14:04 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %hostname %badServerCache %iphost %spareid %hostdom
39: %libserv %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash %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: return undef;
293: }
294:
295: # ------------------------------------------- Transfer profile into environment
296:
297: sub transfer_profile_to_env {
298: my ($lonidsdir,$handle)=@_;
299: if (!defined($lonidsdir)) {
300: $lonidsdir = $perlvar{'lonIDsDir'};
301: }
302: if (!defined($handle)) {
303: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
304: }
305:
306: my @profile;
307: {
308: open(my $idf,"$lonidsdir/$handle.id");
309: flock($idf,LOCK_SH);
310: @profile=<$idf>;
311: close($idf);
312: }
313: my $envi;
314: my %Remove;
315: for ($envi=0;$envi<=$#profile;$envi++) {
316: chomp($profile[$envi]);
317: my ($envname,$envvalue)=split(/=/,$profile[$envi],2);
318: $envname=&unescape($envname);
319: $envvalue=&unescape($envvalue);
320: $env{$envname} = $envvalue;
321: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
322: if ($time < time-300) {
323: $Remove{$key}++;
324: }
325: }
326: }
327: $env{'user.environment'} = "$lonidsdir/$handle.id";
328: foreach my $expired_key (keys(%Remove)) {
329: &delenv($expired_key);
330: }
331: }
332:
333: # ---------------------------------------------------------- Append Environment
334:
335: sub appenv {
336: my %newenv=@_;
337: foreach my $key (keys(%newenv)) {
338: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
339: &logthis("<font color=\"blue\">WARNING: ".
340: "Attempt to modify environment ".$key." to ".$newenv{$key}
341: .'</font>');
342: delete($newenv{$key});
343: } else {
344: $env{$key}=$newenv{$key};
345: }
346: }
347: foreach my $key (keys(%newenv)) {
348: my $value = &escape($newenv{$key});
349: delete($newenv{$key});
350: $newenv{&escape($key)}=$value;
351: }
352:
353: my $lockfh;
354: unless (open($lockfh,"$env{'user.environment'}")) {
355: return 'error: '.$!;
356: }
357: unless (flock($lockfh,LOCK_EX)) {
358: &logthis("<font color=\"blue\">WARNING: ".
359: 'Could not obtain exclusive lock in appenv: '.$!);
360: close($lockfh);
361: return 'error: '.$!;
362: }
363:
364: my @oldenv;
365: {
366: my $fh;
367: unless (open($fh,"$env{'user.environment'}")) {
368: return 'error: '.$!;
369: }
370: @oldenv=<$fh>;
371: close($fh);
372: }
373: for (my $i=0; $i<=$#oldenv; $i++) {
374: chomp($oldenv[$i]);
375: if ($oldenv[$i] ne '') {
376: my ($name,$value)=split(/=/,$oldenv[$i],2);
377: unless (defined($newenv{$name})) {
378: $newenv{$name}=$value;
379: }
380: }
381: }
382: {
383: my $fh;
384: unless (open($fh,">$env{'user.environment'}")) {
385: return 'error';
386: }
387: my $newname;
388: foreach $newname (keys %newenv) {
389: print $fh $newname.'='.$newenv{$newname}."\n";
390: }
391: close($fh);
392: }
393:
394: close($lockfh);
395: return 'ok';
396: }
397: # ----------------------------------------------------- Delete from Environment
398:
399: sub delenv {
400: my $delthis=shift;
401: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
402: &logthis("<font color=\"blue\">WARNING: ".
403: "Attempt to delete from environment ".$delthis);
404: return 'error';
405: }
406: my @oldenv;
407: {
408: my $fh;
409: unless (open($fh,"$env{'user.environment'}")) {
410: return 'error';
411: }
412: unless (flock($fh,LOCK_SH)) {
413: &logthis("<font color=\"blue\">WARNING: ".
414: 'Could not obtain shared lock in delenv: '.$!);
415: close($fh);
416: return 'error: '.$!;
417: }
418: @oldenv=<$fh>;
419: close($fh);
420: }
421: {
422: my $fh;
423: unless (open($fh,">$env{'user.environment'}")) {
424: return 'error';
425: }
426: unless (flock($fh,LOCK_EX)) {
427: &logthis("<font color=\"blue\">WARNING: ".
428: 'Could not obtain exclusive lock in delenv: '.$!);
429: close($fh);
430: return 'error: '.$!;
431: }
432: foreach my $cur_key (@oldenv) {
433: my $unescaped_cur_key = &unescape($cur_key);
434: if ($unescaped_cur_key=~/^$delthis/) {
435: my ($key) = split('=',$cur_key,2);
436: $key = &unescape($key);
437: delete($env{$key});
438: } else {
439: print $fh $cur_key;
440: }
441: }
442: close($fh);
443: }
444: return 'ok';
445: }
446:
447: # ------------------------------------------ Find out current server userload
448: # there is a copy in lond
449: sub userload {
450: my $numusers=0;
451: {
452: opendir(LONIDS,$perlvar{'lonIDsDir'});
453: my $filename;
454: my $curtime=time;
455: while ($filename=readdir(LONIDS)) {
456: if ($filename eq '.' || $filename eq '..') {next;}
457: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
458: if ($curtime-$mtime < 1800) { $numusers++; }
459: }
460: closedir(LONIDS);
461: }
462: my $userloadpercent=0;
463: my $maxuserload=$perlvar{'lonUserLoadLim'};
464: if ($maxuserload) {
465: $userloadpercent=100*$numusers/$maxuserload;
466: }
467: $userloadpercent=sprintf("%.2f",$userloadpercent);
468: return $userloadpercent;
469: }
470:
471: # ------------------------------------------ Fight off request when overloaded
472:
473: sub overloaderror {
474: my ($r,$checkserver)=@_;
475: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
476: my $loadavg;
477: if ($checkserver eq $perlvar{'lonHostID'}) {
478: open(my $loadfile,'/proc/loadavg');
479: $loadavg=<$loadfile>;
480: $loadavg =~ s/\s.*//g;
481: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
482: close($loadfile);
483: } else {
484: $loadavg=&reply('load',$checkserver);
485: }
486: my $overload=$loadavg-100;
487: if ($overload>0) {
488: $r->err_headers_out->{'Retry-After'}=$overload;
489: $r->log_error('Overload of '.$overload.' on '.$checkserver);
490: return 413;
491: }
492: return '';
493: }
494:
495: # ------------------------------ Find server with least workload from spare.tab
496:
497: sub spareserver {
498: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
499: my $tryserver;
500: my $spareserver='';
501: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
502: my $lowestserver=$loadpercent > $userloadpercent?
503: $loadpercent : $userloadpercent;
504: foreach $tryserver (keys(%spareid)) {
505: my $loadans=&reply('load',$tryserver);
506: my $userloadans=&reply('userload',$tryserver);
507: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
508: next; #didn't get a number from the server
509: }
510: my $answer;
511: if ($loadans =~ /\d/) {
512: if ($userloadans =~ /\d/) {
513: #both are numbers, pick the bigger one
514: $answer=$loadans > $userloadans?
515: $loadans : $userloadans;
516: } else {
517: $answer = $loadans;
518: }
519: } else {
520: $answer = $userloadans;
521: }
522: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
523: if ($want_server_name) {
524: $spareserver=$tryserver;
525: } else {
526: $spareserver="http://$hostname{$tryserver}";
527: }
528: $lowestserver=$answer;
529: }
530: }
531: return $spareserver;
532: }
533:
534: # --------------------------------------------- Try to change a user's password
535:
536: sub changepass {
537: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
538: $currentpass = &escape($currentpass);
539: $newpass = &escape($newpass);
540: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
541: $server);
542: if (! $answer) {
543: &logthis("No reply on password change request to $server ".
544: "by $uname in domain $udom.");
545: } elsif ($answer =~ "^ok") {
546: &logthis("$uname in $udom successfully changed their password ".
547: "on $server.");
548: } elsif ($answer =~ "^pwchange_failure") {
549: &logthis("$uname in $udom was unable to change their password ".
550: "on $server. The action was blocked by either lcpasswd ".
551: "or pwchange");
552: } elsif ($answer =~ "^non_authorized") {
553: &logthis("$uname in $udom did not get their password correct when ".
554: "attempting to change it on $server.");
555: } elsif ($answer =~ "^auth_mode_error") {
556: &logthis("$uname in $udom attempted to change their password despite ".
557: "not being locally or internally authenticated on $server.");
558: } elsif ($answer =~ "^unknown_user") {
559: &logthis("$uname in $udom attempted to change their password ".
560: "on $server but were unable to because $server is not ".
561: "their home server.");
562: } elsif ($answer =~ "^refused") {
563: &logthis("$server refused to change $uname in $udom password because ".
564: "it was sent an unencrypted request to change the password.");
565: }
566: return $answer;
567: }
568:
569: # ----------------------- Try to determine user's current authentication scheme
570:
571: sub queryauthenticate {
572: my ($uname,$udom)=@_;
573: my $uhome=&homeserver($uname,$udom);
574: if (!$uhome) {
575: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
576: return 'no_host';
577: }
578: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
579: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
580: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
581: }
582: return $answer;
583: }
584:
585: # --------- Try to authenticate user from domain's lib servers (first this one)
586:
587: sub authenticate {
588: my ($uname,$upass,$udom)=@_;
589: $upass=escape($upass);
590: $uname=~s/\W//g;
591: my $uhome=&homeserver($uname,$udom);
592: if (!$uhome) {
593: &logthis("User $uname at $udom is unknown in authenticate");
594: return 'no_host';
595: }
596: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
597: if ($answer eq 'authorized') {
598: &logthis("User $uname at $udom authorized by $uhome");
599: return $uhome;
600: }
601: if ($answer eq 'non_authorized') {
602: &logthis("User $uname at $udom rejected by $uhome");
603: return 'no_host';
604: }
605: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
606: return 'no_host';
607: }
608:
609: # ---------------------- Find the homebase for a user from domain's lib servers
610:
611: my %homecache;
612: sub homeserver {
613: my ($uname,$udom,$ignoreBadCache)=@_;
614: my $index="$uname:$udom";
615:
616: if (exists($homecache{$index})) { return $homecache{$index}; }
617: my $tryserver;
618: foreach $tryserver (keys %libserv) {
619: next if ($ignoreBadCache ne 'true' &&
620: exists($badServerCache{$tryserver}));
621: if ($hostdom{$tryserver} eq $udom) {
622: my $answer=reply("home:$udom:$uname",$tryserver);
623: if ($answer eq 'found') {
624: return $homecache{$index}=$tryserver;
625: } elsif ($answer eq 'no_host') {
626: $badServerCache{$tryserver}=1;
627: }
628: }
629: }
630: return 'no_host';
631: }
632:
633: # ------------------------------------- Find the usernames behind a list of IDs
634:
635: sub idget {
636: my ($udom,@ids)=@_;
637: my %returnhash=();
638:
639: my $tryserver;
640: foreach $tryserver (keys %libserv) {
641: if ($hostdom{$tryserver} eq $udom) {
642: my $idlist=join('&',@ids);
643: $idlist=~tr/A-Z/a-z/;
644: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
645: my @answer=();
646: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
647: @answer=split(/\&/,$reply);
648: } ;
649: my $i;
650: for ($i=0;$i<=$#ids;$i++) {
651: if ($answer[$i]) {
652: $returnhash{$ids[$i]}=$answer[$i];
653: }
654: }
655: }
656: }
657: return %returnhash;
658: }
659:
660: # ------------------------------------- Find the IDs behind a list of usernames
661:
662: sub idrget {
663: my ($udom,@unames)=@_;
664: my %returnhash=();
665: foreach (@unames) {
666: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
667: }
668: return %returnhash;
669: }
670:
671: # ------------------------------- Store away a list of names and associated IDs
672:
673: sub idput {
674: my ($udom,%ids)=@_;
675: my %servers=();
676: foreach (keys %ids) {
677: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
678: my $uhom=&homeserver($_,$udom);
679: if ($uhom ne 'no_host') {
680: my $id=&escape($ids{$_});
681: $id=~tr/A-Z/a-z/;
682: my $unam=&escape($_);
683: if ($servers{$uhom}) {
684: $servers{$uhom}.='&'.$id.'='.$unam;
685: } else {
686: $servers{$uhom}=$id.'='.$unam;
687: }
688: }
689: }
690: foreach (keys %servers) {
691: &critical('idput:'.$udom.':'.$servers{$_},$_);
692: }
693: }
694:
695: # --------------------------------------------------- Assign a key to a student
696:
697: sub assign_access_key {
698: #
699: # a valid key looks like uname:udom#comments
700: # comments are being appended
701: #
702: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
703: $kdom=
704: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
705: $knum=
706: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
707: $cdom=
708: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
709: $cnum=
710: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
711: $udom=$env{'user.name'} unless (defined($udom));
712: $uname=$env{'user.domain'} unless (defined($uname));
713: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
714: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
715: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
716: # assigned to this person
717: # - this should not happen,
718: # unless something went wrong
719: # the first time around
720: # ready to assign
721: $logentry=$1.'; '.$logentry;
722: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
723: $kdom,$knum) eq 'ok') {
724: # key now belongs to user
725: my $envkey='key.'.$cdom.'_'.$cnum;
726: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
727: &appenv('environment.'.$envkey => $ckey);
728: return 'ok';
729: } else {
730: return
731: 'error: Count not permanently assign key, will need to be re-entered later.';
732: }
733: } else {
734: return 'error: Could not assign key, try again later.';
735: }
736: } elsif (!$existing{$ckey}) {
737: # the key does not exist
738: return 'error: The key does not exist';
739: } else {
740: # the key is somebody else's
741: return 'error: The key is already in use';
742: }
743: }
744:
745: # ------------------------------------------ put an additional comment on a key
746:
747: sub comment_access_key {
748: #
749: # a valid key looks like uname:udom#comments
750: # comments are being appended
751: #
752: my ($ckey,$cdom,$cnum,$logentry)=@_;
753: $cdom=
754: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
755: $cnum=
756: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
757: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
758: if ($existing{$ckey}) {
759: $existing{$ckey}.='; '.$logentry;
760: # ready to assign
761: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
762: $cdom,$cnum) eq 'ok') {
763: return 'ok';
764: } else {
765: return 'error: Count not store comment.';
766: }
767: } else {
768: # the key does not exist
769: return 'error: The key does not exist';
770: }
771: }
772:
773: # ------------------------------------------------------ Generate a set of keys
774:
775: sub generate_access_keys {
776: my ($number,$cdom,$cnum,$logentry)=@_;
777: $cdom=
778: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
779: $cnum=
780: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
781: unless (&allowed('mky',$cdom)) { return 0; }
782: unless (($cdom) && ($cnum)) { return 0; }
783: if ($number>10000) { return 0; }
784: sleep(2); # make sure don't get same seed twice
785: srand(time()^($$+($$<<15))); # from "Programming Perl"
786: my $total=0;
787: for (my $i=1;$i<=$number;$i++) {
788: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
789: sprintf("%lx",int(100000*rand)).'-'.
790: sprintf("%lx",int(100000*rand));
791: $newkey=~s/1/g/g; # folks mix up 1 and l
792: $newkey=~s/0/h/g; # and also 0 and O
793: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
794: if ($existing{$newkey}) {
795: $i--;
796: } else {
797: if (&put('accesskeys',
798: { $newkey => '# generated '.localtime().
799: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
800: '; '.$logentry },
801: $cdom,$cnum) eq 'ok') {
802: $total++;
803: }
804: }
805: }
806: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
807: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
808: return $total;
809: }
810:
811: # ------------------------------------------------------- Validate an accesskey
812:
813: sub validate_access_key {
814: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
815: $cdom=
816: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
817: $cnum=
818: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
819: $udom=$env{'user.domain'} unless (defined($udom));
820: $uname=$env{'user.name'} unless (defined($uname));
821: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
822: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
823: }
824:
825: # ------------------------------------- Find the section of student in a course
826: sub devalidate_getsection_cache {
827: my ($udom,$unam,$courseid)=@_;
828: $courseid=~s/\_/\//g;
829: $courseid=~s/^(\w)/\/$1/;
830: my $hashid="$udom:$unam:$courseid";
831: &devalidate_cache_new('getsection',$hashid);
832: }
833:
834: sub getsection {
835: my ($udom,$unam,$courseid)=@_;
836: my $cachetime=1800;
837: $courseid=~s/\_/\//g;
838: $courseid=~s/^(\w)/\/$1/;
839:
840: my $hashid="$udom:$unam:$courseid";
841: my ($result,$cached)=&is_cached_new('getsection',$hashid);
842: if (defined($cached)) { return $result; }
843:
844: my %Pending;
845: my %Expired;
846: #
847: # Each role can either have not started yet (pending), be active,
848: # or have expired.
849: #
850: # If there is an active role, we are done.
851: #
852: # If there is more than one role which has not started yet,
853: # choose the one which will start sooner
854: # If there is one role which has not started yet, return it.
855: #
856: # If there is more than one expired role, choose the one which ended last.
857: # If there is a role which has expired, return it.
858: #
859: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
860: &homeserver($unam,$udom)))) {
861: my ($key,$value)=split(/\=/,$_);
862: $key=&unescape($key);
863: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
864: my $section=$1;
865: if ($key eq $courseid.'_st') { $section=''; }
866: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
867: my $now=time;
868: if (defined($end) && $end && ($now > $end)) {
869: $Expired{$end}=$section;
870: next;
871: }
872: if (defined($start) && $start && ($now < $start)) {
873: $Pending{$start}=$section;
874: next;
875: }
876: return &do_cache_new('getsection',$hashid,$section,$cachetime);
877: }
878: #
879: # Presumedly there will be few matching roles from the above
880: # loop and the sorting time will be negligible.
881: if (scalar(keys(%Pending))) {
882: my ($time) = sort {$a <=> $b} keys(%Pending);
883: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
884: }
885: if (scalar(keys(%Expired))) {
886: my @sorted = sort {$a <=> $b} keys(%Expired);
887: my $time = pop(@sorted);
888: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
889: }
890: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
891: }
892:
893: sub save_cache {
894: &purge_remembered();
895: #&Apache::loncommon::validate_page();
896: undef(%env);
897: }
898:
899: my $to_remember=-1;
900: my %remembered;
901: my %accessed;
902: my $kicks=0;
903: my $hits=0;
904: sub devalidate_cache_new {
905: my ($name,$id,$debug) = @_;
906: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
907: $id=&escape($name.':'.$id);
908: $memcache->delete($id);
909: delete($remembered{$id});
910: delete($accessed{$id});
911: }
912:
913: sub is_cached_new {
914: my ($name,$id,$debug) = @_;
915: $id=&escape($name.':'.$id);
916: if (exists($remembered{$id})) {
917: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
918: $accessed{$id}=[&gettimeofday()];
919: $hits++;
920: return ($remembered{$id},1);
921: }
922: my $value = $memcache->get($id);
923: if (!(defined($value))) {
924: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
925: return (undef,undef);
926: }
927: if ($value eq '__undef__') {
928: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
929: $value=undef;
930: }
931: &make_room($id,$value,$debug);
932: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
933: return ($value,1);
934: }
935:
936: sub do_cache_new {
937: my ($name,$id,$value,$time,$debug) = @_;
938: $id=&escape($name.':'.$id);
939: my $setvalue=$value;
940: if (!defined($setvalue)) {
941: $setvalue='__undef__';
942: }
943: if (!defined($time) ) {
944: $time=600;
945: }
946: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
947: $memcache->set($id,$setvalue,$time);
948: # need to make a copy of $value
949: #&make_room($id,$value,$debug);
950: return $value;
951: }
952:
953: sub make_room {
954: my ($id,$value,$debug)=@_;
955: $remembered{$id}=$value;
956: if ($to_remember<0) { return; }
957: $accessed{$id}=[&gettimeofday()];
958: if (scalar(keys(%remembered)) <= $to_remember) { return; }
959: my $to_kick;
960: my $max_time=0;
961: foreach my $other (keys(%accessed)) {
962: if (&tv_interval($accessed{$other}) > $max_time) {
963: $to_kick=$other;
964: $max_time=&tv_interval($accessed{$other});
965: }
966: }
967: delete($remembered{$to_kick});
968: delete($accessed{$to_kick});
969: $kicks++;
970: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
971: return;
972: }
973:
974: sub purge_remembered {
975: #&logthis("Tossing ".scalar(keys(%remembered)));
976: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
977: undef(%remembered);
978: undef(%accessed);
979: }
980: # ------------------------------------- Read an entry from a user's environment
981:
982: sub userenvironment {
983: my ($udom,$unam,@what)=@_;
984: my %returnhash=();
985: my @answer=split(/\&/,
986: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
987: &homeserver($unam,$udom)));
988: my $i;
989: for ($i=0;$i<=$#what;$i++) {
990: $returnhash{$what[$i]}=&unescape($answer[$i]);
991: }
992: return %returnhash;
993: }
994:
995: # ---------------------------------------------------------- Get a studentphoto
996: sub studentphoto {
997: my ($udom,$unam,$ext) = @_;
998: my $home=&Apache::lonnet::homeserver($unam,$udom);
999: if (defined($env{'request.course.id'})) {
1000: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
1001: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
1002: return(&retrievestudentphoto($udom,$unam,$ext));
1003: } else {
1004: my ($result,$perm_reqd)=
1005: &Apache::lonnet::auto_photo_permission($unam,$udom);
1006: if ($result eq 'ok') {
1007: if (!($perm_reqd eq 'yes')) {
1008: return(&retrievestudentphoto($udom,$unam,$ext));
1009: }
1010: }
1011: }
1012: }
1013: } else {
1014: my ($result,$perm_reqd) =
1015: &Apache::lonnet::auto_photo_permission($unam,$udom);
1016: if ($result eq 'ok') {
1017: if (!($perm_reqd eq 'yes')) {
1018: return(&retrievestudentphoto($udom,$unam,$ext));
1019: }
1020: }
1021: }
1022: return '/adm/lonKaputt/lonlogo_broken.gif';
1023: }
1024:
1025: sub retrievestudentphoto {
1026: my ($udom,$unam,$ext,$type) = @_;
1027: my $home=&Apache::lonnet::homeserver($unam,$udom);
1028: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1029: if ($ret eq 'ok') {
1030: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1031: if ($type eq 'thumbnail') {
1032: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1033: }
1034: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1035: return $tokenurl;
1036: } else {
1037: if ($type eq 'thumbnail') {
1038: return '/adm/lonKaputt/genericstudent_tn.gif';
1039: } else {
1040: return '/adm/lonKaputt/lonlogo_broken.gif';
1041: }
1042: }
1043: }
1044:
1045: # -------------------------------------------------------------------- New chat
1046:
1047: sub chatsend {
1048: my ($newentry,$anon,$group)=@_;
1049: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1050: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1051: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1052: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1053: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1054: &escape($newentry)).':'.$group,$chome);
1055: }
1056:
1057: # ------------------------------------------ Find current version of a resource
1058:
1059: sub getversion {
1060: my $fname=&clutter(shift);
1061: unless ($fname=~/^\/res\//) { return -1; }
1062: return ¤tversion(&filelocation('',$fname));
1063: }
1064:
1065: sub currentversion {
1066: my $fname=shift;
1067: my ($result,$cached)=&is_cached_new('resversion',$fname);
1068: if (defined($cached)) { return $result; }
1069: my $author=$fname;
1070: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1071: my ($udom,$uname)=split(/\//,$author);
1072: my $home=homeserver($uname,$udom);
1073: if ($home eq 'no_host') {
1074: return -1;
1075: }
1076: my $answer=reply("currentversion:$fname",$home);
1077: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1078: return -1;
1079: }
1080: return &do_cache_new('resversion',$fname,$answer,600);
1081: }
1082:
1083: # ----------------------------- Subscribe to a resource, return URL if possible
1084:
1085: sub subscribe {
1086: my $fname=shift;
1087: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1088: $fname=~s/[\n\r]//g;
1089: my $author=$fname;
1090: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1091: my ($udom,$uname)=split(/\//,$author);
1092: my $home=homeserver($uname,$udom);
1093: if ($home eq 'no_host') {
1094: return 'not_found';
1095: }
1096: my $answer=reply("sub:$fname",$home);
1097: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1098: $answer.=' by '.$home;
1099: }
1100: return $answer;
1101: }
1102:
1103: # -------------------------------------------------------------- Replicate file
1104:
1105: sub repcopy {
1106: my $filename=shift;
1107: $filename=~s/\/+/\//g;
1108: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1109: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1110: if ($filename=~m|^/home/httpd/html/userfiles/| or
1111: $filename=~m -^/*(uploaded|editupload)/-) {
1112: return &repcopy_userfile($filename);
1113: }
1114: $filename=~s/[\n\r]//g;
1115: my $transname="$filename.in.transfer";
1116: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1117: my $remoteurl=subscribe($filename);
1118: if ($remoteurl =~ /^con_lost by/) {
1119: &logthis("Subscribe returned $remoteurl: $filename");
1120: return 'unavailable';
1121: } elsif ($remoteurl eq 'not_found') {
1122: #&logthis("Subscribe returned not_found: $filename");
1123: return 'not_found';
1124: } elsif ($remoteurl =~ /^rejected by/) {
1125: &logthis("Subscribe returned $remoteurl: $filename");
1126: return 'forbidden';
1127: } elsif ($remoteurl eq 'directory') {
1128: return 'ok';
1129: } else {
1130: my $author=$filename;
1131: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1132: my ($udom,$uname)=split(/\//,$author);
1133: my $home=homeserver($uname,$udom);
1134: unless ($home eq $perlvar{'lonHostID'}) {
1135: my @parts=split(/\//,$filename);
1136: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1137: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1138: &logthis("Malconfiguration for replication: $filename");
1139: return 'bad_request';
1140: }
1141: my $count;
1142: for ($count=5;$count<$#parts;$count++) {
1143: $path.="/$parts[$count]";
1144: if ((-e $path)!=1) {
1145: mkdir($path,0777);
1146: }
1147: }
1148: my $ua=new LWP::UserAgent;
1149: my $request=new HTTP::Request('GET',"$remoteurl");
1150: my $response=$ua->request($request,$transname);
1151: if ($response->is_error()) {
1152: unlink($transname);
1153: my $message=$response->status_line;
1154: &logthis("<font color=\"blue\">WARNING:"
1155: ." LWP get: $message: $filename</font>");
1156: return 'unavailable';
1157: } else {
1158: if ($remoteurl!~/\.meta$/) {
1159: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1160: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1161: if ($mresponse->is_error()) {
1162: unlink($filename.'.meta');
1163: &logthis(
1164: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1165: }
1166: }
1167: rename($transname,$filename);
1168: return 'ok';
1169: }
1170: }
1171: }
1172: }
1173:
1174: # ------------------------------------------------ Get server side include body
1175: sub ssi_body {
1176: my ($filelink,%form)=@_;
1177: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1178: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1179: }
1180: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1181: &ssi($filelink,%form));
1182: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
1183: $output=~s/^.*?\<body[^\>]*\>//si;
1184: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1185: return $output;
1186: }
1187:
1188: # --------------------------------------------------------- Server Side Include
1189:
1190: sub ssi {
1191:
1192: my ($fn,%form)=@_;
1193:
1194: my $ua=new LWP::UserAgent;
1195:
1196: my $request;
1197:
1198: $form{'no_update_last_known'}=1;
1199:
1200: if (%form) {
1201: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1202: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1203: } else {
1204: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1205: }
1206:
1207: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1208: my $response=$ua->request($request);
1209:
1210: return $response->content;
1211: }
1212:
1213: sub externalssi {
1214: my ($url)=@_;
1215: my $ua=new LWP::UserAgent;
1216: my $request=new HTTP::Request('GET',$url);
1217: my $response=$ua->request($request);
1218: return $response->content;
1219: }
1220:
1221: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1222:
1223: sub allowuploaded {
1224: my ($srcurl,$url)=@_;
1225: $url=&clutter(&declutter($url));
1226: my $dir=$url;
1227: $dir=~s/\/[^\/]+$//;
1228: my %httpref=();
1229: my $httpurl=&hreflocation('',$url);
1230: $httpref{'httpref.'.$httpurl}=$srcurl;
1231: &Apache::lonnet::appenv(%httpref);
1232: }
1233:
1234: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1235: # input: action, courseID, current domain, intended
1236: # path to file, source of file, instruction to parse file for objects,
1237: # ref to hash for embedded objects,
1238: # ref to hash for codebase of java objects.
1239: #
1240: # output: url to file (if action was uploaddoc),
1241: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1242: #
1243: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1244: # course.
1245: #
1246: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1247: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1248: # course's home server.
1249: #
1250: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1251: # be copied from $source (current location) to
1252: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1253: # and will then be copied to
1254: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1255: # course's home server.
1256: #
1257: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1258: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1259: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1260: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1261: # in course's home server.
1262: #
1263:
1264: sub process_coursefile {
1265: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1266: my $fetchresult;
1267: my $home=&homeserver($docuname,$docudom);
1268: if ($action eq 'propagate') {
1269: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1270: $home);
1271: } else {
1272: my $fpath = '';
1273: my $fname = $file;
1274: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1275: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1276: my $filepath = &build_filepath($fpath);
1277: if ($action eq 'copy') {
1278: if ($source eq '') {
1279: $fetchresult = 'no source file';
1280: return $fetchresult;
1281: } else {
1282: my $destination = $filepath.'/'.$fname;
1283: rename($source,$destination);
1284: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1285: $home);
1286: }
1287: } elsif ($action eq 'uploaddoc') {
1288: open(my $fh,'>'.$filepath.'/'.$fname);
1289: print $fh $env{'form.'.$source};
1290: close($fh);
1291: if ($parser eq 'parse') {
1292: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1293: unless ($parse_result eq 'ok') {
1294: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1295: }
1296: }
1297: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1298: $home);
1299: if ($fetchresult eq 'ok') {
1300: return '/uploaded/'.$fpath.'/'.$fname;
1301: } else {
1302: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1303: ' to host '.$home.': '.$fetchresult);
1304: return '/adm/notfound.html';
1305: }
1306: }
1307: }
1308: unless ( $fetchresult eq 'ok') {
1309: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1310: ' to host '.$home.': '.$fetchresult);
1311: }
1312: return $fetchresult;
1313: }
1314:
1315: sub build_filepath {
1316: my ($fpath) = @_;
1317: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1318: unless ($fpath eq '') {
1319: my @parts=split('/',$fpath);
1320: foreach my $part (@parts) {
1321: $filepath.= '/'.$part;
1322: if ((-e $filepath)!=1) {
1323: mkdir($filepath,0777);
1324: }
1325: }
1326: }
1327: return $filepath;
1328: }
1329:
1330: sub store_edited_file {
1331: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1332: my $file = $primary_url;
1333: $file =~ s#^/uploaded/$docudom/$docuname/##;
1334: my $fpath = '';
1335: my $fname = $file;
1336: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1337: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1338: my $filepath = &build_filepath($fpath);
1339: open(my $fh,'>'.$filepath.'/'.$fname);
1340: print $fh $content;
1341: close($fh);
1342: my $home=&homeserver($docuname,$docudom);
1343: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1344: $home);
1345: if ($$fetchresult eq 'ok') {
1346: return '/uploaded/'.$fpath.'/'.$fname;
1347: } else {
1348: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1349: ' to host '.$home.': '.$$fetchresult);
1350: return '/adm/notfound.html';
1351: }
1352: }
1353:
1354: sub clean_filename {
1355: my ($fname)=@_;
1356: # Replace Windows backslashes by forward slashes
1357: $fname=~s/\\/\//g;
1358: # Get rid of everything but the actual filename
1359: $fname=~s/^.*\/([^\/]+)$/$1/;
1360: # Replace spaces by underscores
1361: $fname=~s/\s+/\_/g;
1362: # Replace all other weird characters by nothing
1363: $fname=~s/[^\w\.\-]//g;
1364: # Replace all .\d. sequences with _\d. so they no longer look like version
1365: # numbers
1366: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1367: return $fname;
1368: }
1369:
1370: # --------------- Take an uploaded file and put it into the userfiles directory
1371: # input: $formname - the contents of the file are in $env{"form.$formname"}
1372: # the desired filenam is in $env{"form.$formname.filename"}
1373: # $coursedoc - if true up to the current course
1374: # if false
1375: # $subdir - directory in userfile to store the file into
1376: # $parser, $allfiles, $codebase - unknown
1377: #
1378: # output: url of file in userspace, or error: <message>
1379: # or /adm/notfound.html if failure to upload occurse
1380:
1381:
1382: sub userfileupload {
1383: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
1384: if (!defined($subdir)) { $subdir='unknown'; }
1385: my $fname=$env{'form.'.$formname.'.filename'};
1386: $fname=&clean_filename($fname);
1387: # See if there is anything left
1388: unless ($fname) { return 'error: no uploaded file'; }
1389: chop($env{'form.'.$formname});
1390: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1391: my $now = time;
1392: my $filepath = 'tmp/helprequests/'.$now;
1393: my @parts=split(/\//,$filepath);
1394: my $fullpath = $perlvar{'lonDaemons'};
1395: for (my $i=0;$i<@parts;$i++) {
1396: $fullpath .= '/'.$parts[$i];
1397: if ((-e $fullpath)!=1) {
1398: mkdir($fullpath,0777);
1399: }
1400: }
1401: open(my $fh,'>'.$fullpath.'/'.$fname);
1402: print $fh $env{'form.'.$formname};
1403: close($fh);
1404: return $fullpath.'/'.$fname;
1405: } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
1406: my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
1407: '_'.$env{'user.domain'}.'/pending';
1408: my @parts=split(/\//,$filepath);
1409: my $fullpath = $perlvar{'lonDaemons'};
1410: for (my $i=0;$i<@parts;$i++) {
1411: $fullpath .= '/'.$parts[$i];
1412: if ((-e $fullpath)!=1) {
1413: mkdir($fullpath,0777);
1414: }
1415: }
1416: open(my $fh,'>'.$fullpath.'/'.$fname);
1417: print $fh $env{'form.'.$formname};
1418: close($fh);
1419: return $fullpath.'/'.$fname;
1420: }
1421:
1422: # Create the directory if not present
1423: $fname="$subdir/$fname";
1424: if ($coursedoc) {
1425: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1426: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1427: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1428: return &finishuserfileupload($docuname,$docudom,
1429: $formname,$fname,$parser,$allfiles,
1430: $codebase);
1431: } else {
1432: $fname=$env{'form.folder'}.'/'.$fname;
1433: return &process_coursefile('uploaddoc',$docuname,$docudom,
1434: $fname,$formname,$parser,
1435: $allfiles,$codebase);
1436: }
1437: } elsif (defined($destuname)) {
1438: my $docuname=$destuname;
1439: my $docudom=$destudom;
1440: return &finishuserfileupload($docuname,$docudom,$formname,
1441: $fname,$parser,$allfiles,$codebase);
1442:
1443: } else {
1444: my $docuname=$env{'user.name'};
1445: my $docudom=$env{'user.domain'};
1446: if (exists($env{'form.group'})) {
1447: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1448: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1449: }
1450: return &finishuserfileupload($docuname,$docudom,$formname,
1451: $fname,$parser,$allfiles,$codebase);
1452: }
1453: }
1454:
1455: sub finishuserfileupload {
1456: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1457: my $path=$docudom.'/'.$docuname.'/';
1458: my $filepath=$perlvar{'lonDocRoot'};
1459: my ($fnamepath,$file);
1460: $file=$fname;
1461: if ($fname=~m|/|) {
1462: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1463: $path.=$fnamepath.'/';
1464: }
1465: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1466: my $count;
1467: for ($count=4;$count<=$#parts;$count++) {
1468: $filepath.="/$parts[$count]";
1469: if ((-e $filepath)!=1) {
1470: mkdir($filepath,0777);
1471: }
1472: }
1473: # Save the file
1474: {
1475: if (!open(FH,'>'.$filepath.'/'.$file)) {
1476: &logthis('Failed to create '.$filepath.'/'.$file);
1477: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1478: return '/adm/notfound.html';
1479: }
1480: if (!print FH ($env{'form.'.$formname})) {
1481: &logthis('Failed to write to '.$filepath.'/'.$file);
1482: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1483: return '/adm/notfound.html';
1484: }
1485: close(FH);
1486: }
1487: if ($parser eq 'parse') {
1488: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1489: $codebase);
1490: unless ($parse_result eq 'ok') {
1491: &logthis('Failed to parse '.$filepath.$file.
1492: ' for embedded media: '.$parse_result);
1493: }
1494: }
1495: # Notify homeserver to grep it
1496: #
1497: my $docuhome=&homeserver($docuname,$docudom);
1498: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1499: if ($fetchresult eq 'ok') {
1500: #
1501: # Return the URL to it
1502: return '/uploaded/'.$path.$file;
1503: } else {
1504: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1505: ': '.$fetchresult);
1506: return '/adm/notfound.html';
1507: }
1508: }
1509:
1510: sub extract_embedded_items {
1511: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1512: my @state = ();
1513: my %javafiles = (
1514: codebase => '',
1515: code => '',
1516: archive => ''
1517: );
1518: my %mediafiles = (
1519: src => '',
1520: movie => '',
1521: );
1522: my $p;
1523: if ($content) {
1524: $p = HTML::LCParser->new($content);
1525: } else {
1526: $p = HTML::LCParser->new($filepath.'/'.$file);
1527: }
1528: while (my $t=$p->get_token()) {
1529: if ($t->[0] eq 'S') {
1530: my ($tagname, $attr) = ($t->[1],$t->[2]);
1531: push (@state, $tagname);
1532: if (lc($tagname) eq 'allow') {
1533: &add_filetype($allfiles,$attr->{'src'},'src');
1534: }
1535: if (lc($tagname) eq 'img') {
1536: &add_filetype($allfiles,$attr->{'src'},'src');
1537: }
1538: if (lc($tagname) eq 'script') {
1539: if ($attr->{'archive'} =~ /\.jar$/i) {
1540: &add_filetype($allfiles,$attr->{'archive'},'archive');
1541: } else {
1542: &add_filetype($allfiles,$attr->{'src'},'src');
1543: }
1544: }
1545: if (lc($tagname) eq 'link') {
1546: if (lc($attr->{'rel'}) eq 'stylesheet') {
1547: &add_filetype($allfiles,$attr->{'href'},'href');
1548: }
1549: }
1550: if (lc($tagname) eq 'object' ||
1551: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1552: foreach my $item (keys(%javafiles)) {
1553: $javafiles{$item} = '';
1554: }
1555: }
1556: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1557: my $name = lc($attr->{'name'});
1558: foreach my $item (keys(%javafiles)) {
1559: if ($name eq $item) {
1560: $javafiles{$item} = $attr->{'value'};
1561: last;
1562: }
1563: }
1564: foreach my $item (keys(%mediafiles)) {
1565: if ($name eq $item) {
1566: &add_filetype($allfiles, $attr->{'value'}, 'value');
1567: last;
1568: }
1569: }
1570: }
1571: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1572: foreach my $item (keys(%javafiles)) {
1573: if ($attr->{$item}) {
1574: $javafiles{$item} = $attr->{$item};
1575: last;
1576: }
1577: }
1578: foreach my $item (keys(%mediafiles)) {
1579: if ($attr->{$item}) {
1580: &add_filetype($allfiles,$attr->{$item},$item);
1581: last;
1582: }
1583: }
1584: }
1585: } elsif ($t->[0] eq 'E') {
1586: my ($tagname) = ($t->[1]);
1587: if ($javafiles{'codebase'} ne '') {
1588: $javafiles{'codebase'} .= '/';
1589: }
1590: if (lc($tagname) eq 'applet' ||
1591: lc($tagname) eq 'object' ||
1592: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1593: ) {
1594: foreach my $item (keys(%javafiles)) {
1595: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1596: my $file=$javafiles{'codebase'}.$javafiles{$item};
1597: &add_filetype($allfiles,$file,$item);
1598: }
1599: }
1600: }
1601: pop @state;
1602: }
1603: }
1604: return 'ok';
1605: }
1606:
1607: sub add_filetype {
1608: my ($allfiles,$file,$type)=@_;
1609: if (exists($allfiles->{$file})) {
1610: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1611: push(@{$allfiles->{$file}}, &escape($type));
1612: }
1613: } else {
1614: @{$allfiles->{$file}} = (&escape($type));
1615: }
1616: }
1617:
1618: sub removeuploadedurl {
1619: my ($url)=@_;
1620: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1621: return &removeuserfile($uname,$udom,$fname);
1622: }
1623:
1624: sub removeuserfile {
1625: my ($docuname,$docudom,$fname)=@_;
1626: my $home=&homeserver($docuname,$docudom);
1627: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1628: }
1629:
1630: sub mkdiruserfile {
1631: my ($docuname,$docudom,$dir)=@_;
1632: my $home=&homeserver($docuname,$docudom);
1633: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1634: }
1635:
1636: sub renameuserfile {
1637: my ($docuname,$docudom,$old,$new)=@_;
1638: my $home=&homeserver($docuname,$docudom);
1639: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1640: &escape("$new"),$home);
1641: }
1642:
1643: # ------------------------------------------------------------------------- Log
1644:
1645: sub log {
1646: my ($dom,$nam,$hom,$what)=@_;
1647: return critical("log:$dom:$nam:$what",$hom);
1648: }
1649:
1650: # ------------------------------------------------------------------ Course Log
1651: #
1652: # This routine flushes several buffers of non-mission-critical nature
1653: #
1654:
1655: sub flushcourselogs {
1656: &logthis('Flushing log buffers');
1657: #
1658: # course logs
1659: # This is a log of all transactions in a course, which can be used
1660: # for data mining purposes
1661: #
1662: # It also collects the courseid database, which lists last transaction
1663: # times and course titles for all courseids
1664: #
1665: my %courseidbuffer=();
1666: foreach (keys %courselogs) {
1667: my $crsid=$_;
1668: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1669: &escape($courselogs{$crsid}),
1670: $coursehombuf{$crsid}) eq 'ok') {
1671: delete $courselogs{$crsid};
1672: } else {
1673: &logthis('Failed to flush log buffer for '.$crsid);
1674: if (length($courselogs{$crsid})>40000) {
1675: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1676: " exceeded maximum size, deleting.</font>");
1677: delete $courselogs{$crsid};
1678: }
1679: }
1680: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1681: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1682: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1683: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1684: } else {
1685: $courseidbuffer{$coursehombuf{$crsid}}=
1686: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1687: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1688: }
1689: }
1690: #
1691: # Write course id database (reverse lookup) to homeserver of courses
1692: # Is used in pickcourse
1693: #
1694: foreach (keys %courseidbuffer) {
1695: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1696: }
1697: #
1698: # File accesses
1699: # Writes to the dynamic metadata of resources to get hit counts, etc.
1700: #
1701: foreach my $entry (keys(%accesshash)) {
1702: if ($entry =~ /___count$/) {
1703: my ($dom,$name);
1704: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1705: if (! defined($dom) || $dom eq '' ||
1706: ! defined($name) || $name eq '') {
1707: my $cid = $env{'request.course.id'};
1708: $dom = $env{'request.'.$cid.'.domain'};
1709: $name = $env{'request.'.$cid.'.num'};
1710: }
1711: my $value = $accesshash{$entry};
1712: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1713: my %temphash=($url => $value);
1714: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1715: if ($result eq 'ok') {
1716: delete $accesshash{$entry};
1717: } elsif ($result eq 'unknown_cmd') {
1718: # Target server has old code running on it.
1719: my %temphash=($entry => $value);
1720: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1721: delete $accesshash{$entry};
1722: }
1723: }
1724: } else {
1725: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1726: my %temphash=($entry => $accesshash{$entry});
1727: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1728: delete $accesshash{$entry};
1729: }
1730: }
1731: }
1732: #
1733: # Roles
1734: # Reverse lookup of user roles for course faculty/staff and co-authorship
1735: #
1736: foreach (keys %userrolehash) {
1737: my $entry=$_;
1738: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1739: split(/\:/,$entry);
1740: if (&Apache::lonnet::put('nohist_userroles',
1741: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1742: $rudom,$runame) eq 'ok') {
1743: delete $userrolehash{$entry};
1744: }
1745: }
1746: #
1747: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1748: #
1749: my %domrolebuffer = ();
1750: foreach my $entry (keys %domainrolehash) {
1751: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1752: if ($domrolebuffer{$rudom}) {
1753: $domrolebuffer{$rudom}.='&'.&escape($entry).
1754: '='.&escape($domainrolehash{$entry});
1755: } else {
1756: $domrolebuffer{$rudom}.=&escape($entry).
1757: '='.&escape($domainrolehash{$entry});
1758: }
1759: delete $domainrolehash{$entry};
1760: }
1761: foreach my $dom (keys(%domrolebuffer)) {
1762: foreach my $tryserver (keys %libserv) {
1763: if ($hostdom{$tryserver} eq $dom) {
1764: unless (&reply('domroleput:'.$dom.':'.
1765: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1766: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1767: }
1768: }
1769: }
1770: }
1771: $dumpcount++;
1772: }
1773:
1774: sub courselog {
1775: my $what=shift;
1776: $what=time.':'.$what;
1777: unless ($env{'request.course.id'}) { return ''; }
1778: $coursedombuf{$env{'request.course.id'}}=
1779: $env{'course.'.$env{'request.course.id'}.'.domain'};
1780: $coursenumbuf{$env{'request.course.id'}}=
1781: $env{'course.'.$env{'request.course.id'}.'.num'};
1782: $coursehombuf{$env{'request.course.id'}}=
1783: $env{'course.'.$env{'request.course.id'}.'.home'};
1784: $coursedescrbuf{$env{'request.course.id'}}=
1785: $env{'course.'.$env{'request.course.id'}.'.description'};
1786: $courseinstcodebuf{$env{'request.course.id'}}=
1787: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1788: $courseownerbuf{$env{'request.course.id'}}=
1789: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1790: $coursetypebuf{$env{'request.course.id'}}=
1791: $env{'course.'.$env{'request.course.id'}.'.type'};
1792: if (defined $courselogs{$env{'request.course.id'}}) {
1793: $courselogs{$env{'request.course.id'}}.='&'.$what;
1794: } else {
1795: $courselogs{$env{'request.course.id'}}.=$what;
1796: }
1797: if (length($courselogs{$env{'request.course.id'}})>4048) {
1798: &flushcourselogs();
1799: }
1800: }
1801:
1802: sub courseacclog {
1803: my $fnsymb=shift;
1804: unless ($env{'request.course.id'}) { return ''; }
1805: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1806: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1807: $what.=':POST';
1808: # FIXME: Probably ought to escape things....
1809: foreach (keys %env) {
1810: if ($_=~/^form\.(.*)/) {
1811: $what.=':'.$1.'='.$env{$_};
1812: }
1813: }
1814: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1815: # FIXME: We should not be depending on a form parameter that someone
1816: # editing lonsearchcat.pm might change in the future.
1817: if ($env{'form.phase'} eq 'course_search') {
1818: $what.= ':POST';
1819: # FIXME: Probably ought to escape things....
1820: foreach my $element ('courseexp','crsfulltext','crsrelated',
1821: 'crsdiscuss') {
1822: $what.=':'.$element.'='.$env{'form.'.$element};
1823: }
1824: }
1825: }
1826: &courselog($what);
1827: }
1828:
1829: sub countacc {
1830: my $url=&declutter(shift);
1831: return if (! defined($url) || $url eq '');
1832: unless ($env{'request.course.id'}) { return ''; }
1833: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1834: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1835: $accesshash{$key}++;
1836: }
1837:
1838: sub linklog {
1839: my ($from,$to)=@_;
1840: $from=&declutter($from);
1841: $to=&declutter($to);
1842: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1843: $accesshash{$to.'___'.$from.'___goto'}=1;
1844: }
1845:
1846: sub userrolelog {
1847: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1848: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1849: ($trole=~/^in/) || ($trole=~/^cc/) ||
1850: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1851: ($trole=~/^ta/)) {
1852: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1853: $userrolehash
1854: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1855: =$tend.':'.$tstart;
1856: }
1857: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1858: ($trole=~/^li/) || ($trole=~/^li/) ||
1859: ($trole=~/^au/) || ($trole=~/^dg/) ||
1860: ($trole=~/^sc/)) {
1861: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1862: $domainrolehash
1863: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1864: = $tend.':'.$tstart;
1865: }
1866: }
1867:
1868: sub get_course_adv_roles {
1869: my $cid=shift;
1870: $cid=$env{'request.course.id'} unless (defined($cid));
1871: my %coursehash=&coursedescription($cid);
1872: my %nothide=();
1873: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1874: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1875: }
1876: my %returnhash=();
1877: my %dumphash=
1878: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1879: my $now=time;
1880: foreach (keys %dumphash) {
1881: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1882: if (($tstart) && ($tstart<0)) { next; }
1883: if (($tend) && ($tend<$now)) { next; }
1884: if (($tstart) && ($now<$tstart)) { next; }
1885: my ($role,$username,$domain,$section)=split(/\:/,$_);
1886: if ($username eq '' || $domain eq '') { next; }
1887: if ((&privileged($username,$domain)) &&
1888: (!$nothide{$username.':'.$domain})) { next; }
1889: if ($role eq 'cr') { next; }
1890: my $key=&plaintext($role);
1891: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1892: if ($returnhash{$key}) {
1893: $returnhash{$key}.=','.$username.':'.$domain;
1894: } else {
1895: $returnhash{$key}=$username.':'.$domain;
1896: }
1897: }
1898: return %returnhash;
1899: }
1900:
1901: sub get_my_roles {
1902: my ($uname,$udom)=@_;
1903: unless (defined($uname)) { $uname=$env{'user.name'}; }
1904: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1905: my %dumphash=
1906: &dump('nohist_userroles',$udom,$uname);
1907: my %returnhash=();
1908: my $now=time;
1909: foreach (keys %dumphash) {
1910: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1911: if (($tstart) && ($tstart<0)) { next; }
1912: if (($tend) && ($tend<$now)) { next; }
1913: if (($tstart) && ($now<$tstart)) { next; }
1914: my ($role,$username,$domain,$section)=split(/\:/,$_);
1915: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1916: }
1917: return %returnhash;
1918: }
1919:
1920: # ----------------------------------------------------- Frontpage Announcements
1921: #
1922: #
1923:
1924: sub postannounce {
1925: my ($server,$text)=@_;
1926: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1927: unless ($text=~/\w/) { $text=''; }
1928: return &reply('setannounce:'.&escape($text),$server);
1929: }
1930:
1931: sub getannounce {
1932:
1933: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1934: my $announcement='';
1935: while (<$fh>) { $announcement .=$_; }
1936: close($fh);
1937: if ($announcement=~/\w/) {
1938: return
1939: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1940: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1941: } else {
1942: return '';
1943: }
1944: } else {
1945: return '';
1946: }
1947: }
1948:
1949: # ---------------------------------------------------------- Course ID routines
1950: # Deal with domain's nohist_courseid.db files
1951: #
1952:
1953: sub courseidput {
1954: my ($domain,$what,$coursehome)=@_;
1955: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1956: }
1957:
1958: sub courseiddump {
1959: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref,$typefilter)=@_;
1960: my %returnhash=();
1961: unless ($domfilter) { $domfilter=''; }
1962: foreach my $tryserver (keys %libserv) {
1963: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1964: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1965: foreach (
1966: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1967: $sincefilter.':'.&escape($descfilter).':'.
1968: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter).':'.&escape($typefilter),
1969: $tryserver))) {
1970: my ($key,$value)=split(/\=/,$_);
1971: if (($key) && ($value)) {
1972: $returnhash{&unescape($key)}=$value;
1973: }
1974: }
1975: }
1976: }
1977: }
1978: return %returnhash;
1979: }
1980:
1981: # ---------------------------------------------------------- DC e-mail
1982:
1983: sub dcmailput {
1984: my ($domain,$msgid,$message,$server)=@_;
1985: my $status = &Apache::lonnet::critical(
1986: 'dcmailput:'.$domain.':'.&escape($msgid).'='.
1987: &escape($message),$server);
1988: return $status;
1989: }
1990:
1991: sub dcmaildump {
1992: my ($dom,$startdate,$enddate,$senders) = @_;
1993: my %returnhash=();
1994: if (exists($domain_primary{$dom})) {
1995: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
1996: &escape($enddate).':';
1997: my @esc_senders=map { &escape($_)} @$senders;
1998: $cmd.=&escape(join('&',@esc_senders));
1999: foreach (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
2000: my ($key,$value) = split(/\=/,$_);
2001: if (($key) && ($value)) {
2002: $returnhash{&unescape($key)} = &unescape($value);
2003: }
2004: }
2005: }
2006: return %returnhash;
2007: }
2008: # ---------------------------------------------------------- Domain roles
2009:
2010: sub get_domain_roles {
2011: my ($dom,$roles,$startdate,$enddate)=@_;
2012: if (undef($startdate) || $startdate eq '') {
2013: $startdate = '.';
2014: }
2015: if (undef($enddate) || $enddate eq '') {
2016: $enddate = '.';
2017: }
2018: my $rolelist = join(':',@{$roles});
2019: my %personnel = ();
2020: foreach my $tryserver (keys(%libserv)) {
2021: if ($hostdom{$tryserver} eq $dom) {
2022: %{$personnel{$tryserver}}=();
2023: foreach (
2024: split(/\&/,&reply('domrolesdump:'.$dom.':'.
2025: &escape($startdate).':'.&escape($enddate).':'.
2026: &escape($rolelist), $tryserver))) {
2027: my($key,$value) = split(/\=/,$_);
2028: if (($key) && ($value)) {
2029: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2030: }
2031: }
2032: }
2033: }
2034: return %personnel;
2035: }
2036:
2037: # ----------------------------------------------------------- Check out an item
2038:
2039: sub get_first_access {
2040: my ($type,$argsymb)=@_;
2041: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2042: if ($argsymb) { $symb=$argsymb; }
2043: my ($map,$id,$res)=&decode_symb($symb);
2044: if ($type eq 'map') {
2045: $res=&symbread($map);
2046: } else {
2047: $res=$symb;
2048: }
2049: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2050: return $times{"$courseid\0$res"};
2051: }
2052:
2053: sub set_first_access {
2054: my ($type)=@_;
2055: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2056: my ($map,$id,$res)=&decode_symb($symb);
2057: if ($type eq 'map') {
2058: $res=&symbread($map);
2059: } else {
2060: $res=$symb;
2061: }
2062: my $firstaccess=&get_first_access($type,$symb);
2063: if (!$firstaccess) {
2064: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2065: }
2066: return 'already_set';
2067: }
2068:
2069: sub checkout {
2070: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2071: my $now=time;
2072: my $lonhost=$perlvar{'lonHostID'};
2073: my $infostr=&escape(
2074: 'CHECKOUTTOKEN&'.
2075: $tuname.'&'.
2076: $tudom.'&'.
2077: $tcrsid.'&'.
2078: $symb.'&'.
2079: $now.'&'.$ENV{'REMOTE_ADDR'});
2080: my $token=&reply('tmpput:'.$infostr,$lonhost);
2081: if ($token=~/^error\:/) {
2082: &logthis("<font color=\"blue\">WARNING: ".
2083: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2084: "</font>");
2085: return '';
2086: }
2087:
2088: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2089: $token=~tr/a-z/A-Z/;
2090:
2091: my %infohash=('resource.0.outtoken' => $token,
2092: 'resource.0.checkouttime' => $now,
2093: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2094:
2095: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2096: return '';
2097: } else {
2098: &logthis("<font color=\"blue\">WARNING: ".
2099: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2100: "</font>");
2101: }
2102:
2103: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2104: &escape('Checkout '.$infostr.' - '.
2105: $token)) ne 'ok') {
2106: return '';
2107: } else {
2108: &logthis("<font color=\"blue\">WARNING: ".
2109: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2110: "</font>");
2111: }
2112: return $token;
2113: }
2114:
2115: # ------------------------------------------------------------ Check in an item
2116:
2117: sub checkin {
2118: my $token=shift;
2119: my $now=time;
2120: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2121: $lonhost=~tr/A-Z/a-z/;
2122: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
2123: $dtoken=~s/\W/\_/g;
2124: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2125: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2126:
2127: unless (($tuname) && ($tudom)) {
2128: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2129: return '';
2130: }
2131:
2132: unless (&allowed('mgr',$tcrsid)) {
2133: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2134: $env{'user.name'}.' - '.$env{'user.domain'});
2135: return '';
2136: }
2137:
2138: my %infohash=('resource.0.intoken' => $token,
2139: 'resource.0.checkintime' => $now,
2140: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2141:
2142: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2143: return '';
2144: }
2145:
2146: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2147: &escape('Checkin - '.$token)) ne 'ok') {
2148: return '';
2149: }
2150:
2151: return ($symb,$tuname,$tudom,$tcrsid);
2152: }
2153:
2154: # --------------------------------------------- Set Expire Date for Spreadsheet
2155:
2156: sub expirespread {
2157: my ($uname,$udom,$stype,$usymb)=@_;
2158: my $cid=$env{'request.course.id'};
2159: if ($cid) {
2160: my $now=time;
2161: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2162: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2163: $env{'course.'.$cid.'.num'}.
2164: ':nohist_expirationdates:'.
2165: &escape($key).'='.$now,
2166: $env{'course.'.$cid.'.home'})
2167: }
2168: return 'ok';
2169: }
2170:
2171: # ----------------------------------------------------- Devalidate Spreadsheets
2172:
2173: sub devalidate {
2174: my ($symb,$uname,$udom)=@_;
2175: my $cid=$env{'request.course.id'};
2176: if ($cid) {
2177: # delete the stored spreadsheets for
2178: # - the student level sheet of this user in course's homespace
2179: # - the assessment level sheet for this resource
2180: # for this user in user's homespace
2181: # - current conditional state info
2182: my $key=$uname.':'.$udom.':';
2183: my $status=
2184: &del('nohist_calculatedsheets',
2185: [$key.'studentcalc:'],
2186: $env{'course.'.$cid.'.domain'},
2187: $env{'course.'.$cid.'.num'})
2188: .' '.
2189: &del('nohist_calculatedsheets_'.$cid,
2190: [$key.'assesscalc:'.$symb],$udom,$uname);
2191: unless ($status eq 'ok ok') {
2192: &logthis('Could not devalidate spreadsheet '.
2193: $uname.' at '.$udom.' for '.
2194: $symb.': '.$status);
2195: }
2196: &delenv('user.state.'.$cid);
2197: }
2198: }
2199:
2200: sub get_scalar {
2201: my ($string,$end) = @_;
2202: my $value;
2203: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2204: $value = $1;
2205: } elsif ($$string =~ s/^([^&]*?)&//) {
2206: $value = $1;
2207: }
2208: return &unescape($value);
2209: }
2210:
2211: sub array2str {
2212: my (@array) = @_;
2213: my $result=&arrayref2str(\@array);
2214: $result=~s/^__ARRAY_REF__//;
2215: $result=~s/__END_ARRAY_REF__$//;
2216: return $result;
2217: }
2218:
2219: sub arrayref2str {
2220: my ($arrayref) = @_;
2221: my $result='__ARRAY_REF__';
2222: foreach my $elem (@$arrayref) {
2223: if(ref($elem) eq 'ARRAY') {
2224: $result.=&arrayref2str($elem).'&';
2225: } elsif(ref($elem) eq 'HASH') {
2226: $result.=&hashref2str($elem).'&';
2227: } elsif(ref($elem)) {
2228: #print("Got a ref of ".(ref($elem))." skipping.");
2229: } else {
2230: $result.=&escape($elem).'&';
2231: }
2232: }
2233: $result=~s/\&$//;
2234: $result .= '__END_ARRAY_REF__';
2235: return $result;
2236: }
2237:
2238: sub hash2str {
2239: my (%hash) = @_;
2240: my $result=&hashref2str(\%hash);
2241: $result=~s/^__HASH_REF__//;
2242: $result=~s/__END_HASH_REF__$//;
2243: return $result;
2244: }
2245:
2246: sub hashref2str {
2247: my ($hashref)=@_;
2248: my $result='__HASH_REF__';
2249: foreach (sort(keys(%$hashref))) {
2250: if (ref($_) eq 'ARRAY') {
2251: $result.=&arrayref2str($_).'=';
2252: } elsif (ref($_) eq 'HASH') {
2253: $result.=&hashref2str($_).'=';
2254: } elsif (ref($_)) {
2255: $result.='=';
2256: #print("Got a ref of ".(ref($_))." skipping.");
2257: } else {
2258: if ($_) {$result.=&escape($_).'=';} else { last; }
2259: }
2260:
2261: if(ref($hashref->{$_}) eq 'ARRAY') {
2262: $result.=&arrayref2str($hashref->{$_}).'&';
2263: } elsif(ref($hashref->{$_}) eq 'HASH') {
2264: $result.=&hashref2str($hashref->{$_}).'&';
2265: } elsif(ref($hashref->{$_})) {
2266: $result.='&';
2267: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2268: } else {
2269: $result.=&escape($hashref->{$_}).'&';
2270: }
2271: }
2272: $result=~s/\&$//;
2273: $result .= '__END_HASH_REF__';
2274: return $result;
2275: }
2276:
2277: sub str2hash {
2278: my ($string)=@_;
2279: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2280: return %$hash;
2281: }
2282:
2283: sub str2hashref {
2284: my ($string) = @_;
2285:
2286: my %hash;
2287:
2288: if($string !~ /^__HASH_REF__/) {
2289: if (! ($string eq '' || !defined($string))) {
2290: $hash{'error'}='Not hash reference';
2291: }
2292: return (\%hash, $string);
2293: }
2294:
2295: $string =~ s/^__HASH_REF__//;
2296:
2297: while($string !~ /^__END_HASH_REF__/) {
2298: #key
2299: my $key='';
2300: if($string =~ /^__HASH_REF__/) {
2301: ($key, $string)=&str2hashref($string);
2302: if(defined($key->{'error'})) {
2303: $hash{'error'}='Bad data';
2304: return (\%hash, $string);
2305: }
2306: } elsif($string =~ /^__ARRAY_REF__/) {
2307: ($key, $string)=&str2arrayref($string);
2308: if($key->[0] eq 'Array reference error') {
2309: $hash{'error'}='Bad data';
2310: return (\%hash, $string);
2311: }
2312: } else {
2313: $string =~ s/^(.*?)=//;
2314: $key=&unescape($1);
2315: }
2316: $string =~ s/^=//;
2317:
2318: #value
2319: my $value='';
2320: if($string =~ /^__HASH_REF__/) {
2321: ($value, $string)=&str2hashref($string);
2322: if(defined($value->{'error'})) {
2323: $hash{'error'}='Bad data';
2324: return (\%hash, $string);
2325: }
2326: } elsif($string =~ /^__ARRAY_REF__/) {
2327: ($value, $string)=&str2arrayref($string);
2328: if($value->[0] eq 'Array reference error') {
2329: $hash{'error'}='Bad data';
2330: return (\%hash, $string);
2331: }
2332: } else {
2333: $value=&get_scalar(\$string,'__END_HASH_REF__');
2334: }
2335: $string =~ s/^&//;
2336:
2337: $hash{$key}=$value;
2338: }
2339:
2340: $string =~ s/^__END_HASH_REF__//;
2341:
2342: return (\%hash, $string);
2343: }
2344:
2345: sub str2array {
2346: my ($string)=@_;
2347: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2348: return @$array;
2349: }
2350:
2351: sub str2arrayref {
2352: my ($string) = @_;
2353: my @array;
2354:
2355: if($string !~ /^__ARRAY_REF__/) {
2356: if (! ($string eq '' || !defined($string))) {
2357: $array[0]='Array reference error';
2358: }
2359: return (\@array, $string);
2360: }
2361:
2362: $string =~ s/^__ARRAY_REF__//;
2363:
2364: while($string !~ /^__END_ARRAY_REF__/) {
2365: my $value='';
2366: if($string =~ /^__HASH_REF__/) {
2367: ($value, $string)=&str2hashref($string);
2368: if(defined($value->{'error'})) {
2369: $array[0] ='Array reference error';
2370: return (\@array, $string);
2371: }
2372: } elsif($string =~ /^__ARRAY_REF__/) {
2373: ($value, $string)=&str2arrayref($string);
2374: if($value->[0] eq 'Array reference error') {
2375: $array[0] ='Array reference error';
2376: return (\@array, $string);
2377: }
2378: } else {
2379: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2380: }
2381: $string =~ s/^&//;
2382:
2383: push(@array, $value);
2384: }
2385:
2386: $string =~ s/^__END_ARRAY_REF__//;
2387:
2388: return (\@array, $string);
2389: }
2390:
2391: # -------------------------------------------------------------------Temp Store
2392:
2393: sub tmpreset {
2394: my ($symb,$namespace,$domain,$stuname) = @_;
2395: if (!$symb) {
2396: $symb=&symbread();
2397: if (!$symb) { $symb= $env{'request.url'}; }
2398: }
2399: $symb=escape($symb);
2400:
2401: if (!$namespace) { $namespace=$env{'request.state'}; }
2402: $namespace=~s/\//\_/g;
2403: $namespace=~s/\W//g;
2404:
2405: if (!$domain) { $domain=$env{'user.domain'}; }
2406: if (!$stuname) { $stuname=$env{'user.name'}; }
2407: if ($domain eq 'public' && $stuname eq 'public') {
2408: $stuname=$ENV{'REMOTE_ADDR'};
2409: }
2410: my $path=$perlvar{'lonDaemons'}.'/tmp';
2411: my %hash;
2412: if (tie(%hash,'GDBM_File',
2413: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2414: &GDBM_WRCREAT(),0640)) {
2415: foreach my $key (keys %hash) {
2416: if ($key=~ /:$symb/) {
2417: delete($hash{$key});
2418: }
2419: }
2420: }
2421: }
2422:
2423: sub tmpstore {
2424: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2425:
2426: if (!$symb) {
2427: $symb=&symbread();
2428: if (!$symb) { $symb= $env{'request.url'}; }
2429: }
2430: $symb=escape($symb);
2431:
2432: if (!$namespace) {
2433: # I don't think we would ever want to store this for a course.
2434: # it seems this will only be used if we don't have a course.
2435: #$namespace=$env{'request.course.id'};
2436: #if (!$namespace) {
2437: $namespace=$env{'request.state'};
2438: #}
2439: }
2440: $namespace=~s/\//\_/g;
2441: $namespace=~s/\W//g;
2442: if (!$domain) { $domain=$env{'user.domain'}; }
2443: if (!$stuname) { $stuname=$env{'user.name'}; }
2444: if ($domain eq 'public' && $stuname eq 'public') {
2445: $stuname=$ENV{'REMOTE_ADDR'};
2446: }
2447: my $now=time;
2448: my %hash;
2449: my $path=$perlvar{'lonDaemons'}.'/tmp';
2450: if (tie(%hash,'GDBM_File',
2451: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2452: &GDBM_WRCREAT(),0640)) {
2453: $hash{"version:$symb"}++;
2454: my $version=$hash{"version:$symb"};
2455: my $allkeys='';
2456: foreach my $key (keys(%$storehash)) {
2457: $allkeys.=$key.':';
2458: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2459: }
2460: $hash{"$version:$symb:timestamp"}=$now;
2461: $allkeys.='timestamp';
2462: $hash{"$version:keys:$symb"}=$allkeys;
2463: if (untie(%hash)) {
2464: return 'ok';
2465: } else {
2466: return "error:$!";
2467: }
2468: } else {
2469: return "error:$!";
2470: }
2471: }
2472:
2473: # -----------------------------------------------------------------Temp Restore
2474:
2475: sub tmprestore {
2476: my ($symb,$namespace,$domain,$stuname) = @_;
2477:
2478: if (!$symb) {
2479: $symb=&symbread();
2480: if (!$symb) { $symb= $env{'request.url'}; }
2481: }
2482: $symb=escape($symb);
2483:
2484: if (!$namespace) { $namespace=$env{'request.state'}; }
2485:
2486: if (!$domain) { $domain=$env{'user.domain'}; }
2487: if (!$stuname) { $stuname=$env{'user.name'}; }
2488: if ($domain eq 'public' && $stuname eq 'public') {
2489: $stuname=$ENV{'REMOTE_ADDR'};
2490: }
2491: my %returnhash;
2492: $namespace=~s/\//\_/g;
2493: $namespace=~s/\W//g;
2494: my %hash;
2495: my $path=$perlvar{'lonDaemons'}.'/tmp';
2496: if (tie(%hash,'GDBM_File',
2497: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2498: &GDBM_READER(),0640)) {
2499: my $version=$hash{"version:$symb"};
2500: $returnhash{'version'}=$version;
2501: my $scope;
2502: for ($scope=1;$scope<=$version;$scope++) {
2503: my $vkeys=$hash{"$scope:keys:$symb"};
2504: my @keys=split(/:/,$vkeys);
2505: my $key;
2506: $returnhash{"$scope:keys"}=$vkeys;
2507: foreach $key (@keys) {
2508: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2509: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2510: }
2511: }
2512: if (!(untie(%hash))) {
2513: return "error:$!";
2514: }
2515: } else {
2516: return "error:$!";
2517: }
2518: return %returnhash;
2519: }
2520:
2521: # ----------------------------------------------------------------------- Store
2522:
2523: sub store {
2524: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2525: my $home='';
2526:
2527: if ($stuname) { $home=&homeserver($stuname,$domain); }
2528:
2529: $symb=&symbclean($symb);
2530: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2531:
2532: if (!$domain) { $domain=$env{'user.domain'}; }
2533: if (!$stuname) { $stuname=$env{'user.name'}; }
2534:
2535: &devalidate($symb,$stuname,$domain);
2536:
2537: $symb=escape($symb);
2538: if (!$namespace) {
2539: unless ($namespace=$env{'request.course.id'}) {
2540: return '';
2541: }
2542: }
2543: if (!$home) { $home=$env{'user.home'}; }
2544:
2545: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2546: $$storehash{'host'}=$perlvar{'lonHostID'};
2547:
2548: my $namevalue='';
2549: foreach (keys %$storehash) {
2550: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2551: }
2552: $namevalue=~s/\&$//;
2553: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2554: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2555: }
2556:
2557: # -------------------------------------------------------------- Critical Store
2558:
2559: sub cstore {
2560: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2561: my $home='';
2562:
2563: if ($stuname) { $home=&homeserver($stuname,$domain); }
2564:
2565: $symb=&symbclean($symb);
2566: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2567:
2568: if (!$domain) { $domain=$env{'user.domain'}; }
2569: if (!$stuname) { $stuname=$env{'user.name'}; }
2570:
2571: &devalidate($symb,$stuname,$domain);
2572:
2573: $symb=escape($symb);
2574: if (!$namespace) {
2575: unless ($namespace=$env{'request.course.id'}) {
2576: return '';
2577: }
2578: }
2579: if (!$home) { $home=$env{'user.home'}; }
2580:
2581: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2582: $$storehash{'host'}=$perlvar{'lonHostID'};
2583:
2584: my $namevalue='';
2585: foreach (keys %$storehash) {
2586: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2587: }
2588: $namevalue=~s/\&$//;
2589: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2590: return critical
2591: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2592: }
2593:
2594: # --------------------------------------------------------------------- Restore
2595:
2596: sub restore {
2597: my ($symb,$namespace,$domain,$stuname) = @_;
2598: my $home='';
2599:
2600: if ($stuname) { $home=&homeserver($stuname,$domain); }
2601:
2602: if (!$symb) {
2603: unless ($symb=escape(&symbread())) { return ''; }
2604: } else {
2605: $symb=&escape(&symbclean($symb));
2606: }
2607: if (!$namespace) {
2608: unless ($namespace=$env{'request.course.id'}) {
2609: return '';
2610: }
2611: }
2612: if (!$domain) { $domain=$env{'user.domain'}; }
2613: if (!$stuname) { $stuname=$env{'user.name'}; }
2614: if (!$home) { $home=$env{'user.home'}; }
2615: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2616:
2617: my %returnhash=();
2618: foreach (split(/\&/,$answer)) {
2619: my ($name,$value)=split(/\=/,$_);
2620: $returnhash{&unescape($name)}=&thaw_unescape($value);
2621: }
2622: my $version;
2623: for ($version=1;$version<=$returnhash{'version'};$version++) {
2624: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2625: $returnhash{$_}=$returnhash{$version.':'.$_};
2626: }
2627: }
2628: return %returnhash;
2629: }
2630:
2631: # ---------------------------------------------------------- Course Description
2632:
2633: sub coursedescription {
2634: my ($courseid,$args)=@_;
2635: $courseid=~s/^\///;
2636: $courseid=~s/\_/\//g;
2637: my ($cdomain,$cnum)=split(/\//,$courseid);
2638: my $chome=&homeserver($cnum,$cdomain);
2639: my $normalid=$cdomain.'_'.$cnum;
2640: # need to always cache even if we get errors otherwise we keep
2641: # trying and trying and trying to get the course description.
2642: my %envhash=();
2643: my %returnhash=();
2644:
2645: my $expiretime=600;
2646: if ($env{'request.course.id'} eq $normalid) {
2647: $expiretime=120;
2648: }
2649:
2650: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
2651: if (!$args->{'freshen_cache'}
2652: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
2653: foreach my $key (keys(%env)) {
2654: next if ($key !~ /^\Q$prefix\E(.*)/);
2655: my ($setting) = $1;
2656: $returnhash{$setting} = $env{$key};
2657: }
2658: return %returnhash;
2659: }
2660:
2661: # get the data agin
2662: if (!$args->{'one_time'}) {
2663: $envhash{'course.'.$normalid.'.last_cache'}=time;
2664: }
2665: if ($chome ne 'no_host') {
2666: %returnhash=&dump('environment',$cdomain,$cnum);
2667: if (!exists($returnhash{'con_lost'})) {
2668: $returnhash{'home'}= $chome;
2669: $returnhash{'domain'} = $cdomain;
2670: $returnhash{'num'} = $cnum;
2671: if (!defined($returnhash{'type'})) {
2672: $returnhash{'type'} = 'Course';
2673: }
2674: while (my ($name,$value) = each %returnhash) {
2675: $envhash{'course.'.$normalid.'.'.$name}=$value;
2676: }
2677: $returnhash{'url'}=&clutter($returnhash{'url'});
2678: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2679: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2680: $envhash{'course.'.$normalid.'.home'}=$chome;
2681: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2682: $envhash{'course.'.$normalid.'.num'}=$cnum;
2683: }
2684: }
2685: if (!$args->{'one_time'}) {
2686: &appenv(%envhash);
2687: }
2688: return %returnhash;
2689: }
2690:
2691: # -------------------------------------------------See if a user is privileged
2692:
2693: sub privileged {
2694: my ($username,$domain)=@_;
2695: my $rolesdump=&reply("dump:$domain:$username:roles",
2696: &homeserver($username,$domain));
2697: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2698: my $now=time;
2699: if ($rolesdump ne '') {
2700: foreach (split(/&/,$rolesdump)) {
2701: if ($_!~/^rolesdef_/) {
2702: my ($area,$role)=split(/=/,$_);
2703: $area=~s/\_\w\w$//;
2704: my ($trole,$tend,$tstart)=split(/_/,$role);
2705: if (($trole eq 'dc') || ($trole eq 'su')) {
2706: my $active=1;
2707: if ($tend) {
2708: if ($tend<$now) { $active=0; }
2709: }
2710: if ($tstart) {
2711: if ($tstart>$now) { $active=0; }
2712: }
2713: if ($active) { return 1; }
2714: }
2715: }
2716: }
2717: }
2718: return 0;
2719: }
2720:
2721: # -------------------------------------------------------- Get user privileges
2722:
2723: sub rolesinit {
2724: my ($domain,$username,$authhost)=@_;
2725: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2726: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2727: my %allroles=();
2728: my %allgroups=();
2729: my $now=time;
2730: my %userroles = ('user.login.time' => $now);
2731: my $group_privs;
2732:
2733: if ($rolesdump ne '') {
2734: foreach (split(/&/,$rolesdump)) {
2735: if ($_!~/^rolesdef_/) {
2736: my ($area,$role)=split(/=/,$_);
2737: $area=~s/\_\w\w$//;
2738: my ($trole,$tend,$tstart,$group_privs);
2739: if ($role=~/^cr/) {
2740: if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
2741: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2742: ($tend,$tstart)=split('_',$trest);
2743: } else {
2744: $trole=$role;
2745: }
2746: } elsif ($role =~ m|^gr/|) {
2747: ($trole,$tend,$tstart) = split(/_/,$role);
2748: ($trole,$group_privs) = split(/\//,$trole);
2749: $group_privs = &unescape($group_privs);
2750: } else {
2751: ($trole,$tend,$tstart)=split(/_/,$role);
2752: }
2753: my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
2754: $username);
2755: @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
2756: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2757: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2758: if (($area ne '') && ($trole ne '')) {
2759: my $spec=$trole.'.'.$area;
2760: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2761: if ($trole =~ /^cr\//) {
2762: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2763: } elsif ($trole eq 'gr') {
2764: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2765: } else {
2766: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2767: }
2768: }
2769: }
2770: }
2771: my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
2772: $userroles{'user.adv'} = $adv;
2773: $userroles{'user.author'} = $author;
2774: $env{'user.adv'}=$adv;
2775: }
2776: return \%userroles;
2777: }
2778:
2779: sub set_arearole {
2780: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2781: # log the associated role with the area
2782: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2783: return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
2784: }
2785:
2786: sub custom_roleprivs {
2787: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2788: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2789: my $homsvr=homeserver($rauthor,$rdomain);
2790: if ($hostname{$homsvr} ne '') {
2791: my ($rdummy,$roledef)=
2792: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2793: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2794: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2795: if (defined($syspriv)) {
2796: $$allroles{'cm./'}.=':'.$syspriv;
2797: $$allroles{$spec.'./'}.=':'.$syspriv;
2798: }
2799: if ($tdomain ne '') {
2800: if (defined($dompriv)) {
2801: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2802: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2803: }
2804: if (($trest ne '') && (defined($coursepriv))) {
2805: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2806: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2807: }
2808: }
2809: }
2810: }
2811: }
2812:
2813: sub group_roleprivs {
2814: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2815: my $access = 1;
2816: my $now = time;
2817: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2818: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2819: if ($access) {
2820: my ($course,$group) = ($area =~ m|(/\w+/\w+)/([^/]+)$|);
2821: $$allgroups{$course}{$group} .=':'.$group_privs;
2822: }
2823: }
2824:
2825: sub standard_roleprivs {
2826: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2827: if (defined($pr{$trole.':s'})) {
2828: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2829: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2830: }
2831: if ($tdomain ne '') {
2832: if (defined($pr{$trole.':d'})) {
2833: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2834: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2835: }
2836: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2837: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2838: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2839: }
2840: }
2841: }
2842:
2843: sub set_userprivs {
2844: my ($userroles,$allroles,$allgroups) = @_;
2845: my $author=0;
2846: my $adv=0;
2847: my %grouproles = ();
2848: if (keys(%{$allgroups}) > 0) {
2849: foreach my $role (keys %{$allroles}) {
2850: my ($trole,$area,$sec,$extendedarea);
2851: if ($role =~ m-^(\w+|cr/\w+/\w+/\w+)\.(/\w+/\w+)(/?\w*)-) {
2852: $trole = $1;
2853: $area = $2;
2854: $sec = $3;
2855: $extendedarea = $area.$sec;
2856: if (exists($$allgroups{$area})) {
2857: foreach my $group (keys(%{$$allgroups{$area}})) {
2858: my $spec = $trole.'.'.$extendedarea;
2859: $grouproles{$spec.'.'.$area.'/'.$group} =
2860: $$allgroups{$area}{$group};
2861: }
2862: }
2863: }
2864: }
2865: }
2866: foreach (keys(%grouproles)) {
2867: $$allroles{$_} = $grouproles{$_};
2868: }
2869: foreach (keys %{$allroles}) {
2870: my %thesepriv=();
2871: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2872: foreach (split(/:/,$$allroles{$_})) {
2873: if ($_ ne '') {
2874: my ($privilege,$restrictions)=split(/&/,$_);
2875: if ($restrictions eq '') {
2876: $thesepriv{$privilege}='F';
2877: } elsif ($thesepriv{$privilege} ne 'F') {
2878: $thesepriv{$privilege}.=$restrictions;
2879: }
2880: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2881: }
2882: }
2883: my $thesestr='';
2884: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2885: $userroles->{'user.priv.'.$_} = $thesestr;
2886: }
2887: return ($author,$adv);
2888: }
2889:
2890: # --------------------------------------------------------------- get interface
2891:
2892: sub get {
2893: my ($namespace,$storearr,$udomain,$uname)=@_;
2894: my $items='';
2895: foreach (@$storearr) {
2896: $items.=escape($_).'&';
2897: }
2898: $items=~s/\&$//;
2899: if (!$udomain) { $udomain=$env{'user.domain'}; }
2900: if (!$uname) { $uname=$env{'user.name'}; }
2901: my $uhome=&homeserver($uname,$udomain);
2902:
2903: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2904: my @pairs=split(/\&/,$rep);
2905: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2906: return @pairs;
2907: }
2908: my %returnhash=();
2909: my $i=0;
2910: foreach (@$storearr) {
2911: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2912: $i++;
2913: }
2914: return %returnhash;
2915: }
2916:
2917: # --------------------------------------------------------------- del interface
2918:
2919: sub del {
2920: my ($namespace,$storearr,$udomain,$uname)=@_;
2921: my $items='';
2922: foreach (@$storearr) {
2923: $items.=escape($_).'&';
2924: }
2925: $items=~s/\&$//;
2926: if (!$udomain) { $udomain=$env{'user.domain'}; }
2927: if (!$uname) { $uname=$env{'user.name'}; }
2928: my $uhome=&homeserver($uname,$udomain);
2929:
2930: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2931: }
2932:
2933: # -------------------------------------------------------------- dump interface
2934:
2935: sub dump {
2936: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2937: if (!$udomain) { $udomain=$env{'user.domain'}; }
2938: if (!$uname) { $uname=$env{'user.name'}; }
2939: my $uhome=&homeserver($uname,$udomain);
2940: if ($regexp) {
2941: $regexp=&escape($regexp);
2942: } else {
2943: $regexp='.';
2944: }
2945: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
2946: my @pairs=split(/\&/,$rep);
2947: my %returnhash=();
2948: foreach my $item (@pairs) {
2949: my ($key,$value)=split(/=/,$item,2);
2950: $key = &unescape($key);
2951: next if ($key =~ /^error: 2 /);
2952: $returnhash{$key}=&thaw_unescape($value);
2953: }
2954: return %returnhash;
2955: }
2956:
2957: # --------------------------------------------------------- dumpstore interface
2958:
2959: sub dumpstore {
2960: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2961: return &dump($namespace,$udomain,$uname,$regexp,$range);
2962: }
2963:
2964: # -------------------------------------------------------------- keys interface
2965:
2966: sub getkeys {
2967: my ($namespace,$udomain,$uname)=@_;
2968: if (!$udomain) { $udomain=$env{'user.domain'}; }
2969: if (!$uname) { $uname=$env{'user.name'}; }
2970: my $uhome=&homeserver($uname,$udomain);
2971: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2972: my @keyarray=();
2973: foreach (split(/\&/,$rep)) {
2974: push (@keyarray,&unescape($_));
2975: }
2976: return @keyarray;
2977: }
2978:
2979: # --------------------------------------------------------------- currentdump
2980: sub currentdump {
2981: my ($courseid,$sdom,$sname)=@_;
2982: $courseid = $env{'request.course.id'} if (! defined($courseid));
2983: $sdom = $env{'user.domain'} if (! defined($sdom));
2984: $sname = $env{'user.name'} if (! defined($sname));
2985: my $uhome = &homeserver($sname,$sdom);
2986: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2987: return if ($rep =~ /^(error:|no_such_host)/);
2988: #
2989: my %returnhash=();
2990: #
2991: if ($rep eq "unknown_cmd") {
2992: # an old lond will not know currentdump
2993: # Do a dump and make it look like a currentdump
2994: my @tmp = &dump($courseid,$sdom,$sname,'.');
2995: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2996: my %hash = @tmp;
2997: @tmp=();
2998: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2999: } else {
3000: my @pairs=split(/\&/,$rep);
3001: foreach (@pairs) {
3002: my ($key,$value)=split(/=/,$_);
3003: my ($symb,$param) = split(/:/,$key);
3004: $returnhash{&unescape($symb)}->{&unescape($param)} =
3005: &thaw_unescape($value);
3006: }
3007: }
3008: return %returnhash;
3009: }
3010:
3011: sub convert_dump_to_currentdump{
3012: my %hash = %{shift()};
3013: my %returnhash;
3014: # Code ripped from lond, essentially. The only difference
3015: # here is the unescaping done by lonnet::dump(). Conceivably
3016: # we might run in to problems with parameter names =~ /^v\./
3017: while (my ($key,$value) = each(%hash)) {
3018: my ($v,$symb,$param) = split(/:/,$key);
3019: next if ($v eq 'version' || $symb eq 'keys');
3020: next if (exists($returnhash{$symb}) &&
3021: exists($returnhash{$symb}->{$param}) &&
3022: $returnhash{$symb}->{'v.'.$param} > $v);
3023: $returnhash{$symb}->{$param}=$value;
3024: $returnhash{$symb}->{'v.'.$param}=$v;
3025: }
3026: #
3027: # Remove all of the keys in the hashes which keep track of
3028: # the version of the parameter.
3029: while (my ($symb,$param_hash) = each(%returnhash)) {
3030: # use a foreach because we are going to delete from the hash.
3031: foreach my $key (keys(%$param_hash)) {
3032: delete($param_hash->{$key}) if ($key =~ /^v\./);
3033: }
3034: }
3035: return \%returnhash;
3036: }
3037:
3038: # ------------------------------------------------------ critical inc interface
3039:
3040: sub cinc {
3041: return &inc(@_,'critical');
3042: }
3043:
3044: # --------------------------------------------------------------- inc interface
3045:
3046: sub inc {
3047: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3048: if (!$udomain) { $udomain=$env{'user.domain'}; }
3049: if (!$uname) { $uname=$env{'user.name'}; }
3050: my $uhome=&homeserver($uname,$udomain);
3051: my $items='';
3052: if (! ref($store)) {
3053: # got a single value, so use that instead
3054: $items = &escape($store).'=&';
3055: } elsif (ref($store) eq 'SCALAR') {
3056: $items = &escape($$store).'=&';
3057: } elsif (ref($store) eq 'ARRAY') {
3058: $items = join('=&',map {&escape($_);} @{$store});
3059: } elsif (ref($store) eq 'HASH') {
3060: while (my($key,$value) = each(%{$store})) {
3061: $items.= &escape($key).'='.&escape($value).'&';
3062: }
3063: }
3064: $items=~s/\&$//;
3065: if ($critical) {
3066: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3067: } else {
3068: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3069: }
3070: }
3071:
3072: # --------------------------------------------------------------- put interface
3073:
3074: sub put {
3075: my ($namespace,$storehash,$udomain,$uname)=@_;
3076: if (!$udomain) { $udomain=$env{'user.domain'}; }
3077: if (!$uname) { $uname=$env{'user.name'}; }
3078: my $uhome=&homeserver($uname,$udomain);
3079: my $items='';
3080: foreach (keys %$storehash) {
3081: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3082: }
3083: $items=~s/\&$//;
3084: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3085: }
3086:
3087: # ------------------------------------------------------------ newput interface
3088:
3089: sub newput {
3090: my ($namespace,$storehash,$udomain,$uname)=@_;
3091: if (!$udomain) { $udomain=$env{'user.domain'}; }
3092: if (!$uname) { $uname=$env{'user.name'}; }
3093: my $uhome=&homeserver($uname,$udomain);
3094: my $items='';
3095: foreach my $key (keys(%$storehash)) {
3096: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3097: }
3098: $items=~s/\&$//;
3099: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3100: }
3101:
3102: # --------------------------------------------------------- putstore interface
3103:
3104: sub putstore {
3105: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3106: if (!$udomain) { $udomain=$env{'user.domain'}; }
3107: if (!$uname) { $uname=$env{'user.name'}; }
3108: my $uhome=&homeserver($uname,$udomain);
3109: my $items='';
3110: foreach my $key (keys(%$storehash)) {
3111: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3112: }
3113: $items=~s/\&$//;
3114: my $esc_symb=&escape($symb);
3115: my $esc_v=&escape($version);
3116: my $reply =
3117: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3118: $uhome);
3119: if ($reply eq 'unknown_cmd') {
3120: # gfall back to way things use to be done
3121: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3122: $uname);
3123: }
3124: return $reply;
3125: }
3126:
3127: sub old_putstore {
3128: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3129: if (!$udomain) { $udomain=$env{'user.domain'}; }
3130: if (!$uname) { $uname=$env{'user.name'}; }
3131: my $uhome=&homeserver($uname,$udomain);
3132: my %newstorehash;
3133: foreach (keys %$storehash) {
3134: my $key = $version.':'.&escape($symb).':'.$_;
3135: $newstorehash{$key} = $storehash->{$_};
3136: }
3137: my $items='';
3138: my %allitems = ();
3139: foreach (keys %newstorehash) {
3140: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3141: my $key = $1.':keys:'.$2;
3142: $allitems{$key} .= $3.':';
3143: }
3144: $items.=$_.'='.&freeze_escape($newstorehash{$_}).'&';
3145: }
3146: foreach (keys %allitems) {
3147: $allitems{$_} =~ s/\:$//;
3148: $items.= $_.'='.$allitems{$_}.'&';
3149: }
3150: $items=~s/\&$//;
3151: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3152: }
3153:
3154: # ------------------------------------------------------ critical put interface
3155:
3156: sub cput {
3157: my ($namespace,$storehash,$udomain,$uname)=@_;
3158: if (!$udomain) { $udomain=$env{'user.domain'}; }
3159: if (!$uname) { $uname=$env{'user.name'}; }
3160: my $uhome=&homeserver($uname,$udomain);
3161: my $items='';
3162: foreach (keys %$storehash) {
3163: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3164: }
3165: $items=~s/\&$//;
3166: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3167: }
3168:
3169: # -------------------------------------------------------------- eget interface
3170:
3171: sub eget {
3172: my ($namespace,$storearr,$udomain,$uname)=@_;
3173: my $items='';
3174: foreach (@$storearr) {
3175: $items.=escape($_).'&';
3176: }
3177: $items=~s/\&$//;
3178: if (!$udomain) { $udomain=$env{'user.domain'}; }
3179: if (!$uname) { $uname=$env{'user.name'}; }
3180: my $uhome=&homeserver($uname,$udomain);
3181: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3182: my @pairs=split(/\&/,$rep);
3183: my %returnhash=();
3184: my $i=0;
3185: foreach (@$storearr) {
3186: $returnhash{$_}=&thaw_unescape($pairs[$i]);
3187: $i++;
3188: }
3189: return %returnhash;
3190: }
3191:
3192: # ------------------------------------------------------------ tmpput interface
3193: sub tmpput {
3194: my ($storehash,$server)=@_;
3195: my $items='';
3196: foreach (keys(%$storehash)) {
3197: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3198: }
3199: $items=~s/\&$//;
3200: return &reply("tmpput:$items",$server);
3201: }
3202:
3203: # ------------------------------------------------------------ tmpget interface
3204: sub tmpget {
3205: my ($token,$server)=@_;
3206: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3207: my $rep=&reply("tmpget:$token",$server);
3208: my %returnhash;
3209: foreach my $item (split(/\&/,$rep)) {
3210: my ($key,$value)=split(/=/,$item);
3211: $returnhash{&unescape($key)}=&thaw_unescape($value);
3212: }
3213: return %returnhash;
3214: }
3215:
3216: # ------------------------------------------------------------ tmpget interface
3217: sub tmpdel {
3218: my ($token,$server)=@_;
3219: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3220: return &reply("tmpdel:$token",$server);
3221: }
3222:
3223: # -------------------------------------------------- portfolio access checking
3224:
3225: sub portfolio_access {
3226: my ($requrl) = @_;
3227: my (undef,$udom,$unum,$file_name,$group) = &parse_portfolio_url($requrl);
3228: my $result = &get_portfolio_access($udom,$unum,$file_name,$group);
3229: if ($result eq 'ok') {
3230: return 'F';
3231: } elsif ($result =~ /^[^:]+:guest_/) {
3232: return 'A';
3233: }
3234: return '';
3235: }
3236:
3237: sub get_portfolio_access {
3238: my ($udom,$unum,$file_name,$group,$access_hash) = @_;
3239:
3240: if (!ref($access_hash)) {
3241: my $current_perms = &get_portfile_permissions($udom,$unum);
3242: my %access_controls = &get_access_controls($current_perms,$group,
3243: $file_name);
3244: $access_hash = $access_controls{$file_name};
3245: }
3246:
3247: my ($public,$guest,@domains,@users,@courses,@groups);
3248: my $now = time;
3249: if (ref($access_hash) eq 'HASH') {
3250: foreach my $key (keys(%{$access_hash})) {
3251: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
3252: if ($start > $now) {
3253: next;
3254: }
3255: if ($end && $end<$now) {
3256: next;
3257: }
3258: if ($scope eq 'public') {
3259: $public = $key;
3260: last;
3261: } elsif ($scope eq 'guest') {
3262: $guest = $key;
3263: } elsif ($scope eq 'domains') {
3264: push(@domains,$key);
3265: } elsif ($scope eq 'users') {
3266: push(@users,$key);
3267: } elsif ($scope eq 'course') {
3268: push(@courses,$key);
3269: } elsif ($scope eq 'group') {
3270: push(@groups,$key);
3271: }
3272: }
3273: if ($public) {
3274: return 'ok';
3275: }
3276: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3277: if ($guest) {
3278: return $guest;
3279: }
3280: } else {
3281: if (@domains > 0) {
3282: foreach my $domkey (@domains) {
3283: if (ref($access_hash->{$domkey}{'dom'}) eq 'ARRAY') {
3284: if (grep(/^\Q$env{'user.domain'}\E$/,@{$access_hash->{$domkey}{'dom'}})) {
3285: return 'ok';
3286: }
3287: }
3288: }
3289: }
3290: if (@users > 0) {
3291: foreach my $userkey (@users) {
3292: if (exists($access_hash->{$userkey}{'users'}{$env{'user.name'}.':'.$env{'user.domain'}})) {
3293: return 'ok';
3294: }
3295: }
3296: }
3297: my %roleshash;
3298: my @courses_and_groups = @courses;
3299: push(@courses_and_groups,@groups);
3300: if (@courses_and_groups > 0) {
3301: my (%allgroups,%allroles);
3302: my ($start,$end,$role,$sec,$group);
3303: foreach my $envkey (%env) {
3304: if ($envkey =~ m-^user\.role\.(gr|cc|in|ta|ep|st)\./([^/]+)/([^/]+)/?([^/]*)$-) {
3305: my $cid = $2.'_'.$3;
3306: if ($1 eq 'gr') {
3307: $group = $4;
3308: $allgroups{$cid}{$group} = $env{$envkey};
3309: } else {
3310: if ($4 eq '') {
3311: $sec = 'none';
3312: } else {
3313: $sec = $4;
3314: }
3315: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3316: }
3317: } elsif ($envkey =~ m-^user\.role\./cr/(\w+/\w+/\w*)./([^/]+)/([^/]+)/?([^/]*)$-) {
3318: my $cid = $2.'_'.$3;
3319: if ($4 eq '') {
3320: $sec = 'none';
3321: } else {
3322: $sec = $4;
3323: }
3324: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3325: }
3326: }
3327: if (keys(%allroles) == 0) {
3328: return;
3329: }
3330: foreach my $key (@courses_and_groups) {
3331: my %content = %{$$access_hash{$key}};
3332: my $cnum = $content{'number'};
3333: my $cdom = $content{'domain'};
3334: my $cid = $cdom.'_'.$cnum;
3335: if (!exists($allroles{$cid})) {
3336: next;
3337: }
3338: foreach my $role_id (keys(%{$content{'roles'}})) {
3339: my @sections = @{$content{'roles'}{$role_id}{'section'}};
3340: my @groups = @{$content{'roles'}{$role_id}{'group'}};
3341: my @status = @{$content{'roles'}{$role_id}{'access'}};
3342: my @roles = @{$content{'roles'}{$role_id}{'role'}};
3343: foreach my $role (keys(%{$allroles{$cid}})) {
3344: if ((grep/^all$/,@roles) || (grep/^\Q$role\E$/,@roles)) {
3345: foreach my $sec (keys(%{$allroles{$cid}{$role}})) {
3346: if (&course_group_datechecker($allroles{$cid}{$role}{$sec},$now,\@status) eq 'ok') {
3347: if (grep/^all$/,@sections) {
3348: return 'ok';
3349: } else {
3350: if (grep/^$sec$/,@sections) {
3351: return 'ok';
3352: }
3353: }
3354: }
3355: }
3356: if (keys(%{$allgroups{$cid}}) == 0) {
3357: if (grep/^none$/,@groups) {
3358: return 'ok';
3359: }
3360: } else {
3361: if (grep/^all$/,@groups) {
3362: return 'ok';
3363: }
3364: foreach my $group (keys(%{$allgroups{$cid}})) {
3365: if (grep/^$group$/,@groups) {
3366: return 'ok';
3367: }
3368: }
3369: }
3370: }
3371: }
3372: }
3373: }
3374: }
3375: if ($guest) {
3376: return $guest;
3377: }
3378: }
3379: }
3380: return;
3381: }
3382:
3383: sub course_group_datechecker {
3384: my ($dates,$now,$status) = @_;
3385: my ($start,$end) = split(/\./,$dates);
3386: if (!$start && !$end) {
3387: return 'ok';
3388: }
3389: if (grep/^active$/,@{$status}) {
3390: if (((!$start) || ($start && $start <= $now)) && ((!$end) || ($end && $end >= $now))) {
3391: return 'ok';
3392: }
3393: }
3394: if (grep/^previous$/,@{$status}) {
3395: if ($end > $now ) {
3396: return 'ok';
3397: }
3398: }
3399: if (grep/^future$/,@{$status}) {
3400: if ($start > $now) {
3401: return 'ok';
3402: }
3403: }
3404: return;
3405: }
3406:
3407: sub parse_portfolio_url {
3408: my ($url) = @_;
3409:
3410: my ($type,$udom,$unum,$group,$file_name);
3411:
3412: if ($url =~ m-^/*uploaded/([^/]+)/([^/]+)/portfolio(/.+)$-) {
3413: $type = 1;
3414: $udom = $1;
3415: $unum = $2;
3416: $file_name = $3;
3417: } elsif ($url =~ m-^/*uploaded/([^/]+)/([^/]+)/groups/([^/]+)/portfolio/(.+)$-) {
3418: $type = 2;
3419: $udom = $1;
3420: $unum = $2;
3421: $group = $3;
3422: $file_name = $3.'/'.$4;
3423: }
3424: if (wantarray) {
3425: return ($type,$udom,$unum,$file_name,$group);
3426: }
3427: return $type;
3428: }
3429:
3430: sub is_portfolio_url {
3431: my ($url) = @_;
3432: return scalar(&parse_portfolio_url($url));
3433: }
3434:
3435: # ---------------------------------------------- Custom access rule evaluation
3436:
3437: sub customaccess {
3438: my ($priv,$uri)=@_;
3439: my ($urole,$urealm)=split(/\./,$env{'request.role'});
3440: $urealm=~s/^\W//;
3441: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
3442: my $access=0;
3443: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3444: my ($effect,$realm,$role)=split(/\:/,$_);
3445: if ($role) {
3446: if ($role ne $urole) { next; }
3447: }
3448: foreach (split(/\s*\,\s*/,$realm)) {
3449: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
3450: if ($tdom) {
3451: if ($tdom ne $udom) { next; }
3452: }
3453: if ($tcrs) {
3454: if ($tcrs ne $ucrs) { next; }
3455: }
3456: if ($tsec) {
3457: if ($tsec ne $usec) { next; }
3458: }
3459: $access=($effect eq 'allow');
3460: last;
3461: }
3462: if ($realm eq '' && $role eq '') {
3463: $access=($effect eq 'allow');
3464: }
3465: }
3466: return $access;
3467: }
3468:
3469: # ------------------------------------------------- Check for a user privilege
3470:
3471: sub allowed {
3472: my ($priv,$uri,$symb)=@_;
3473: my $ver_orguri=$uri;
3474: $uri=&deversion($uri);
3475: my $orguri=$uri;
3476: $uri=&declutter($uri);
3477:
3478: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3479: # Free bre access to adm and meta resources
3480: if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard)$}))
3481: || (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) ))
3482: && ($priv eq 'bre')) {
3483: return 'F';
3484: }
3485:
3486: # Free bre access to user's own portfolio contents
3487: my ($space,$domain,$name,@dir)=split('/',$uri);
3488: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3489: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
3490: return 'F';
3491: }
3492:
3493: # bre access to group portfolio for rgf priv in group, or mdg or vcg in course.
3494: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
3495: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
3496: if (exists($env{'request.course.id'})) {
3497: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
3498: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
3499: if (($domain eq $cdom) && ($name eq $cnum)) {
3500: my $courseprivid=$env{'request.course.id'};
3501: $courseprivid=~s/\_/\//;
3502: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
3503: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
3504: return $1;
3505: } else {
3506: if ($env{'request.course.sec'}) {
3507: $courseprivid.='/'.$env{'request.course.sec'};
3508: }
3509: if ($env{'user.priv.'.$env{'request.role'}.'./'.
3510: $courseprivid} =~/(mdg|vcg)\&([^\:]*)/) {
3511: return $2;
3512: }
3513: }
3514: }
3515: }
3516: }
3517:
3518: # Free bre to public access
3519:
3520: if ($priv eq 'bre') {
3521: my $copyright=&metadata($uri,'copyright');
3522: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3523: return 'F';
3524: }
3525: if ($copyright eq 'priv') {
3526: $uri=~/([^\/]+)\/([^\/]+)\//;
3527: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3528: return '';
3529: }
3530: }
3531: if ($copyright eq 'domain') {
3532: $uri=~/([^\/]+)\/([^\/]+)\//;
3533: unless (($env{'user.domain'} eq $1) ||
3534: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3535: return '';
3536: }
3537: }
3538: if ($env{'request.role'}=~ /li\.\//) {
3539: # Library role, so allow browsing of resources in this domain.
3540: return 'F';
3541: }
3542: if ($copyright eq 'custom') {
3543: unless (&customaccess($priv,$uri)) { return ''; }
3544: }
3545: }
3546: # Domain coordinator is trying to create a course
3547: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3548: # uri is the requested domain in this case.
3549: # comparison to 'request.role.domain' shows if the user has selected
3550: # a role of dc for the domain in question.
3551: return 'F' if ($uri eq $env{'request.role.domain'});
3552: }
3553:
3554: my $thisallowed='';
3555: my $statecond=0;
3556: my $courseprivid='';
3557:
3558: # Course
3559:
3560: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3561: $thisallowed.=$1;
3562: }
3563:
3564: # Domain
3565:
3566: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3567: =~/\Q$priv\E\&([^\:]*)/) {
3568: $thisallowed.=$1;
3569: }
3570:
3571: # Course: uri itself is a course
3572: my $courseuri=$uri;
3573: $courseuri=~s/\_(\d)/\/$1/;
3574: $courseuri=~s/^([^\/])/\/$1/;
3575:
3576: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3577: =~/\Q$priv\E\&([^\:]*)/) {
3578: $thisallowed.=$1;
3579: }
3580:
3581: # URI is an uploaded document for this course, default permissions don't matter
3582: # not allowing 'edit' access (editupload) to uploaded course docs
3583: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3584: $thisallowed='';
3585: my ($match)=&is_on_map($uri);
3586: if ($match) {
3587: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3588: =~/\Q$priv\E\&([^\:]*)/) {
3589: $thisallowed.=$1;
3590: }
3591: } else {
3592: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
3593: if ($refuri) {
3594: if ($refuri =~ m|^/adm/|) {
3595: $thisallowed='F';
3596: } else {
3597: $refuri=&declutter($refuri);
3598: my ($match) = &is_on_map($refuri);
3599: if ($match) {
3600: $thisallowed='F';
3601: }
3602: }
3603: }
3604: }
3605: }
3606:
3607: if ($priv eq 'bre'
3608: && $thisallowed ne 'F'
3609: && $thisallowed ne '2'
3610: && &is_portfolio_url($uri)) {
3611: $thisallowed = &portfolio_access($uri);
3612: }
3613:
3614: # Full access at system, domain or course-wide level? Exit.
3615:
3616: if ($thisallowed=~/F/) {
3617: return 'F';
3618: }
3619:
3620: # If this is generating or modifying users, exit with special codes
3621:
3622: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3623: if (($priv eq 'cca') || ($priv eq 'caa')) {
3624: my ($audom,$auname)=split('/',$uri);
3625: # no author name given, so this just checks on the general right to make a co-author in this domain
3626: unless ($auname) { return $thisallowed; }
3627: # an author name is given, so we are about to actually make a co-author for a certain account
3628: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3629: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3630: ($audom ne $env{'request.role.domain'}))) { return ''; }
3631: }
3632: return $thisallowed;
3633: }
3634: #
3635: # Gathered so far: system, domain and course wide privileges
3636: #
3637: # Course: See if uri or referer is an individual resource that is part of
3638: # the course
3639:
3640: if ($env{'request.course.id'}) {
3641:
3642: $courseprivid=$env{'request.course.id'};
3643: if ($env{'request.course.sec'}) {
3644: $courseprivid.='/'.$env{'request.course.sec'};
3645: }
3646: $courseprivid=~s/\_/\//;
3647: my $checkreferer=1;
3648: my ($match,$cond)=&is_on_map($uri);
3649: if ($match) {
3650: $statecond=$cond;
3651: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3652: =~/\Q$priv\E\&([^\:]*)/) {
3653: $thisallowed.=$1;
3654: $checkreferer=0;
3655: }
3656: }
3657:
3658: if ($checkreferer) {
3659: my $refuri=$env{'httpref.'.$orguri};
3660: unless ($refuri) {
3661: foreach (keys %env) {
3662: if ($_=~/^httpref\..*\*/) {
3663: my $pattern=$_;
3664: $pattern=~s/^httpref\.\/res\///;
3665: $pattern=~s/\*/\[\^\/\]\+/g;
3666: $pattern=~s/\//\\\//g;
3667: if ($orguri=~/$pattern/) {
3668: $refuri=$env{$_};
3669: }
3670: }
3671: }
3672: }
3673:
3674: if ($refuri) {
3675: $refuri=&declutter($refuri);
3676: my ($match,$cond)=&is_on_map($refuri);
3677: if ($match) {
3678: my $refstatecond=$cond;
3679: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3680: =~/\Q$priv\E\&([^\:]*)/) {
3681: $thisallowed.=$1;
3682: $uri=$refuri;
3683: $statecond=$refstatecond;
3684: }
3685: }
3686: }
3687: }
3688: }
3689:
3690: #
3691: # Gathered now: all privileges that could apply, and condition number
3692: #
3693: #
3694: # Full or no access?
3695: #
3696:
3697: if ($thisallowed=~/F/) {
3698: return 'F';
3699: }
3700:
3701: unless ($thisallowed) {
3702: return '';
3703: }
3704:
3705: # Restrictions exist, deal with them
3706: #
3707: # C:according to course preferences
3708: # R:according to resource settings
3709: # L:unless locked
3710: # X:according to user session state
3711: #
3712:
3713: # Possibly locked functionality, check all courses
3714: # Locks might take effect only after 10 minutes cache expiration for other
3715: # courses, and 2 minutes for current course
3716:
3717: my $envkey;
3718: if ($thisallowed=~/L/) {
3719: foreach $envkey (keys %env) {
3720: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3721: my $courseid=$2;
3722: my $roleid=$1.'.'.$2;
3723: $courseid=~s/^\///;
3724: my $expiretime=600;
3725: if ($env{'request.role'} eq $roleid) {
3726: $expiretime=120;
3727: }
3728: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3729: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3730: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3731: &coursedescription($courseid,{'freshen_cache' => 1});
3732: }
3733: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3734: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3735: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3736: &log($env{'user.domain'},$env{'user.name'},
3737: $env{'user.home'},
3738: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3739: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3740: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3741: return '';
3742: }
3743: }
3744: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3745: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3746: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3747: &log($env{'user.domain'},$env{'user.name'},
3748: $env{'user.home'},
3749: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3750: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3751: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3752: return '';
3753: }
3754: }
3755: }
3756: }
3757: }
3758:
3759: #
3760: # Rest of the restrictions depend on selected course
3761: #
3762:
3763: unless ($env{'request.course.id'}) {
3764: if ($thisallowed eq 'A') {
3765: return 'A';
3766: } else {
3767: return '1';
3768: }
3769: }
3770:
3771: #
3772: # Now user is definitely in a course
3773: #
3774:
3775:
3776: # Course preferences
3777:
3778: if ($thisallowed=~/C/) {
3779: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3780: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
3781: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
3782: =~/\Q$rolecode\E/) {
3783: if ($priv ne 'pch') {
3784: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3785: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3786: $env{'request.course.id'});
3787: }
3788: return '';
3789: }
3790:
3791: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
3792: =~/\Q$unamedom\E/) {
3793: if ($priv ne 'pch') {
3794: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
3795: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3796: $env{'request.course.id'});
3797: }
3798: return '';
3799: }
3800: }
3801:
3802: # Resource preferences
3803:
3804: if ($thisallowed=~/R/) {
3805: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3806: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3807: if ($priv ne 'pch') {
3808: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3809: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3810: }
3811: return '';
3812: }
3813: }
3814:
3815: # Restricted by state or randomout?
3816:
3817: if ($thisallowed=~/X/) {
3818: if ($env{'acc.randomout'}) {
3819: if (!$symb) { $symb=&symbread($uri,1); }
3820: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3821: return '';
3822: }
3823: }
3824: if (&condval($statecond)) {
3825: return '2';
3826: } else {
3827: return '';
3828: }
3829: }
3830:
3831: if ($thisallowed eq 'A') {
3832: return 'A';
3833: }
3834: return 'F';
3835: }
3836:
3837: sub split_uri_for_cond {
3838: my $uri=&deversion(&declutter(shift));
3839: my @uriparts=split(/\//,$uri);
3840: my $filename=pop(@uriparts);
3841: my $pathname=join('/',@uriparts);
3842: return ($pathname,$filename);
3843: }
3844: # --------------------------------------------------- Is a resource on the map?
3845:
3846: sub is_on_map {
3847: my ($pathname,$filename) = &split_uri_for_cond(shift);
3848: #Trying to find the conditional for the file
3849: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3850: /\&\Q$filename\E\:([\d\|]+)\&/);
3851: if ($match) {
3852: return (1,$1);
3853: } else {
3854: return (0,0);
3855: }
3856: }
3857:
3858: # --------------------------------------------------------- Get symb from alias
3859:
3860: sub get_symb_from_alias {
3861: my $symb=shift;
3862: my ($map,$resid,$url)=&decode_symb($symb);
3863: # Already is a symb
3864: if ($url) { return $symb; }
3865: # Must be an alias
3866: my $aliassymb='';
3867: my %bighash;
3868: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3869: &GDBM_READER(),0640)) {
3870: my $rid=$bighash{'mapalias_'.$symb};
3871: if ($rid) {
3872: my ($mapid,$resid)=split(/\./,$rid);
3873: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3874: $resid,$bighash{'src_'.$rid});
3875: }
3876: untie %bighash;
3877: }
3878: return $aliassymb;
3879: }
3880:
3881: # ----------------------------------------------------------------- Define Role
3882:
3883: sub definerole {
3884: if (allowed('mcr','/')) {
3885: my ($rolename,$sysrole,$domrole,$courole)=@_;
3886: foreach (split(':',$sysrole)) {
3887: my ($crole,$cqual)=split(/\&/,$_);
3888: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3889: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3890: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3891: return "refused:s:$crole&$cqual";
3892: }
3893: }
3894: }
3895: foreach (split(':',$domrole)) {
3896: my ($crole,$cqual)=split(/\&/,$_);
3897: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3898: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3899: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3900: return "refused:d:$crole&$cqual";
3901: }
3902: }
3903: }
3904: foreach (split(':',$courole)) {
3905: my ($crole,$cqual)=split(/\&/,$_);
3906: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3907: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3908: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3909: return "refused:c:$crole&$cqual";
3910: }
3911: }
3912: }
3913: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3914: "$env{'user.domain'}:$env{'user.name'}:".
3915: "rolesdef_$rolename=".
3916: escape($sysrole.'_'.$domrole.'_'.$courole);
3917: return reply($command,$env{'user.home'});
3918: } else {
3919: return 'refused';
3920: }
3921: }
3922:
3923: # ---------------- Make a metadata query against the network of library servers
3924:
3925: sub metadata_query {
3926: my ($query,$custom,$customshow,$server_array)=@_;
3927: my %rhash;
3928: my @server_list = (defined($server_array) ? @$server_array
3929: : keys(%libserv) );
3930: for my $server (@server_list) {
3931: unless ($custom or $customshow) {
3932: my $reply=&reply("querysend:".&escape($query),$server);
3933: $rhash{$server}=$reply;
3934: }
3935: else {
3936: my $reply=&reply("querysend:".&escape($query).':'.
3937: &escape($custom).':'.&escape($customshow),
3938: $server);
3939: $rhash{$server}=$reply;
3940: }
3941: }
3942: return \%rhash;
3943: }
3944:
3945: # ----------------------------------------- Send log queries and wait for reply
3946:
3947: sub log_query {
3948: my ($uname,$udom,$query,%filters)=@_;
3949: my $uhome=&homeserver($uname,$udom);
3950: if ($uhome eq 'no_host') { return 'error: no_host'; }
3951: my $uhost=$hostname{$uhome};
3952: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3953: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3954: $uhome);
3955: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3956: return get_query_reply($queryid);
3957: }
3958:
3959: # ------- Request retrieval of institutional classlists for course(s)
3960:
3961: sub fetch_enrollment_query {
3962: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3963: my $homeserver;
3964: my $maxtries = 1;
3965: if ($context eq 'automated') {
3966: $homeserver = $perlvar{'lonHostID'};
3967: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3968: } else {
3969: $homeserver = &homeserver($cnum,$dom);
3970: }
3971: my $host=$hostname{$homeserver};
3972: my $cmd = '';
3973: foreach (keys %{$affiliatesref}) {
3974: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3975: }
3976: $cmd =~ s/%%$//;
3977: $cmd = &escape($cmd);
3978: my $query = 'fetchenrollment';
3979: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3980: unless ($queryid=~/^\Q$host\E\_/) {
3981: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3982: return 'error: '.$queryid;
3983: }
3984: my $reply = &get_query_reply($queryid);
3985: my $tries = 1;
3986: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3987: $reply = &get_query_reply($queryid);
3988: $tries ++;
3989: }
3990: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3991: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3992: } else {
3993: my @responses = split/:/,$reply;
3994: if ($homeserver eq $perlvar{'lonHostID'}) {
3995: foreach (@responses) {
3996: my ($key,$value) = split/=/,$_;
3997: $$replyref{$key} = $value;
3998: }
3999: } else {
4000: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
4001: foreach (@responses) {
4002: my ($key,$value) = split/=/,$_;
4003: $$replyref{$key} = $value;
4004: if ($value > 0) {
4005: foreach (@{$$affiliatesref{$key}}) {
4006: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
4007: my $destname = $pathname.'/'.$filename;
4008: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
4009: if ($xml_classlist =~ /^error/) {
4010: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
4011: } else {
4012: if ( open(FILE,">$destname") ) {
4013: print FILE &unescape($xml_classlist);
4014: close(FILE);
4015: } else {
4016: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
4017: }
4018: }
4019: }
4020: }
4021: }
4022: }
4023: return 'ok';
4024: }
4025: return 'error';
4026: }
4027:
4028: sub get_query_reply {
4029: my $queryid=shift;
4030: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
4031: my $reply='';
4032: for (1..100) {
4033: sleep 2;
4034: if (-e $replyfile.'.end') {
4035: if (open(my $fh,$replyfile)) {
4036: $reply.=<$fh>;
4037: close($fh);
4038: } else { return 'error: reply_file_error'; }
4039: return &unescape($reply);
4040: }
4041: }
4042: return 'timeout:'.$queryid;
4043: }
4044:
4045: sub courselog_query {
4046: #
4047: # possible filters:
4048: # url: url or symb
4049: # username
4050: # domain
4051: # action: view, submit, grade
4052: # start: timestamp
4053: # end: timestamp
4054: #
4055: my (%filters)=@_;
4056: unless ($env{'request.course.id'}) { return 'no_course'; }
4057: if ($filters{'url'}) {
4058: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
4059: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
4060: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
4061: }
4062: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
4063: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
4064: return &log_query($cname,$cdom,'courselog',%filters);
4065: }
4066:
4067: sub userlog_query {
4068: my ($uname,$udom,%filters)=@_;
4069: return &log_query($uname,$udom,'userlog',%filters);
4070: }
4071:
4072: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
4073:
4074: sub auto_run {
4075: my ($cnum,$cdom) = @_;
4076: my $homeserver = &homeserver($cnum,$cdom);
4077: my $response = &reply('autorun:'.$cdom,$homeserver);
4078: return $response;
4079: }
4080:
4081: sub auto_get_sections {
4082: my ($cnum,$cdom,$inst_coursecode) = @_;
4083: my $homeserver = &homeserver($cnum,$cdom);
4084: my @secs = ();
4085: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
4086: unless ($response eq 'refused') {
4087: @secs = split/:/,$response;
4088: }
4089: return @secs;
4090: }
4091:
4092: sub auto_new_course {
4093: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
4094: my $homeserver = &homeserver($cnum,$cdom);
4095: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
4096: return $response;
4097: }
4098:
4099: sub auto_validate_courseID {
4100: my ($cnum,$cdom,$inst_course_id) = @_;
4101: my $homeserver = &homeserver($cnum,$cdom);
4102: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
4103: return $response;
4104: }
4105:
4106: sub auto_create_password {
4107: my ($cnum,$cdom,$authparam) = @_;
4108: my $homeserver = &homeserver($cnum,$cdom);
4109: my $create_passwd = 0;
4110: my $authchk = '';
4111: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
4112: if ($response eq 'refused') {
4113: $authchk = 'refused';
4114: } else {
4115: ($authparam,$create_passwd,$authchk) = split/:/,$response;
4116: }
4117: return ($authparam,$create_passwd,$authchk);
4118: }
4119:
4120: sub auto_photo_permission {
4121: my ($cnum,$cdom,$students) = @_;
4122: my $homeserver = &homeserver($cnum,$cdom);
4123: my ($outcome,$perm_reqd,$conditions) =
4124: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
4125: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4126: return (undef,undef);
4127: }
4128: return ($outcome,$perm_reqd,$conditions);
4129: }
4130:
4131: sub auto_checkphotos {
4132: my ($uname,$udom,$pid) = @_;
4133: my $homeserver = &homeserver($uname,$udom);
4134: my ($result,$resulttype);
4135: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
4136: &escape($uname).':'.&escape($pid),
4137: $homeserver));
4138: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4139: return (undef,undef);
4140: }
4141: if ($outcome) {
4142: ($result,$resulttype) = split(/:/,$outcome);
4143: }
4144: return ($result,$resulttype);
4145: }
4146:
4147: sub auto_photochoice {
4148: my ($cnum,$cdom) = @_;
4149: my $homeserver = &homeserver($cnum,$cdom);
4150: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
4151: &escape($cdom),
4152: $homeserver)));
4153: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4154: return (undef,undef);
4155: }
4156: return ($update,$comment);
4157: }
4158:
4159: sub auto_photoupdate {
4160: my ($affiliatesref,$dom,$cnum,$photo) = @_;
4161: my $homeserver = &homeserver($cnum,$dom);
4162: my $host=$hostname{$homeserver};
4163: my $cmd = '';
4164: my $maxtries = 1;
4165: foreach (keys %{$affiliatesref}) {
4166: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
4167: }
4168: $cmd =~ s/%%$//;
4169: $cmd = &escape($cmd);
4170: my $query = 'institutionalphotos';
4171: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
4172: unless ($queryid=~/^\Q$host\E\_/) {
4173: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
4174: return 'error: '.$queryid;
4175: }
4176: my $reply = &get_query_reply($queryid);
4177: my $tries = 1;
4178: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4179: $reply = &get_query_reply($queryid);
4180: $tries ++;
4181: }
4182: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4183: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4184: } else {
4185: my @responses = split(/:/,$reply);
4186: my $outcome = shift(@responses);
4187: foreach my $item (@responses) {
4188: my ($key,$value) = split(/=/,$item);
4189: $$photo{$key} = $value;
4190: }
4191: return $outcome;
4192: }
4193: return 'error';
4194: }
4195:
4196: sub auto_instcode_format {
4197: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
4198: my $courses = '';
4199: my @homeservers;
4200: if ($caller eq 'global') {
4201: foreach my $tryserver (keys %libserv) {
4202: if ($hostdom{$tryserver} eq $codedom) {
4203: if (!grep/^\Q$tryserver\E$/,@homeservers) {
4204: push(@homeservers,$tryserver);
4205: }
4206: }
4207: }
4208: } else {
4209: push(@homeservers,&homeserver($caller,$codedom));
4210: }
4211: foreach (keys %{$instcodes}) {
4212: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
4213: }
4214: chop($courses);
4215: my $ok_response = 0;
4216: my $response;
4217: while (@homeservers > 0 && $ok_response == 0) {
4218: my $server = shift(@homeservers);
4219: $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$server);
4220: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4221: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) =
4222: split/:/,$response;
4223: %{$codes} = (%{$codes},&str2hash($codes_str));
4224: push(@{$codetitles},&str2array($codetitles_str));
4225: %{$cat_titles} = (%{$cat_titles},&str2hash($cat_titles_str));
4226: %{$cat_order} = (%{$cat_order},&str2hash($cat_order_str));
4227: $ok_response = 1;
4228: }
4229: }
4230: if ($ok_response) {
4231: return 'ok';
4232: } else {
4233: return $response;
4234: }
4235: }
4236:
4237: sub auto_validate_class_sec {
4238: my ($cdom,$cnum,$owner,$inst_class) = @_;
4239: my $homeserver = &homeserver($cnum,$cdom);
4240: my $response=&reply('autovalidateclass_sec:'.$inst_class.':'.
4241: &escape($owner).':'.$cdom,$homeserver);
4242: return $response;
4243: }
4244:
4245: # ------------------------------------------------------- Course Group routines
4246:
4247: sub get_coursegroups {
4248: my ($cdom,$cnum,$group) = @_;
4249: return(&dump('coursegroups',$cdom,$cnum,$group));
4250: }
4251:
4252: sub modify_coursegroup {
4253: my ($cdom,$cnum,$groupsettings) = @_;
4254: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
4255: }
4256:
4257: sub modify_group_roles {
4258: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
4259: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
4260: my $role = 'gr/'.&escape($userprivs);
4261: my ($uname,$udom) = split(/:/,$user);
4262: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
4263: if ($result eq 'ok') {
4264: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
4265: }
4266: return $result;
4267: }
4268:
4269: sub modify_coursegroup_membership {
4270: my ($cdom,$cnum,$membership) = @_;
4271: my $result = &put('groupmembership',$membership,$cdom,$cnum);
4272: return $result;
4273: }
4274:
4275: sub get_active_groups {
4276: my ($udom,$uname,$cdom,$cnum) = @_;
4277: my $now = time;
4278: my %groups = ();
4279: foreach my $key (keys(%env)) {
4280: if ($key =~ m-user\.role\.gr\./([^/]+)/([^/]+)/(\w+)$-) {
4281: my ($start,$end) = split(/\./,$env{$key});
4282: if (($end!=0) && ($end<$now)) { next; }
4283: if (($start!=0) && ($start>$now)) { next; }
4284: if ($1 eq $cdom && $2 eq $cnum) {
4285: $groups{$3} = $env{$key} ;
4286: }
4287: }
4288: }
4289: return %groups;
4290: }
4291:
4292: sub get_group_membership {
4293: my ($cdom,$cnum,$group) = @_;
4294: return(&dump('groupmembership',$cdom,$cnum,$group));
4295: }
4296:
4297: sub get_users_groups {
4298: my ($udom,$uname,$courseid) = @_;
4299: my @usersgroups;
4300: my $cachetime=1800;
4301: $courseid=~s/\_/\//g;
4302: $courseid=~s/^(\w)/\/$1/;
4303:
4304: my $hashid="$udom:$uname:$courseid";
4305: my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
4306: if (defined($cached)) {
4307: @usersgroups = split(/:/,$grouplist);
4308: } else {
4309: $grouplist = '';
4310: my %roleshash = &dump('roles',$udom,$uname,$courseid);
4311: my ($tmp) = keys(%roleshash);
4312: if ($tmp=~/^error:/) {
4313: &logthis('Error retrieving roles: '.$tmp.' for '.$uname.':'.$udom);
4314: } else {
4315: my $access_end = $env{'course.'.$courseid.
4316: '.default_enrollment_end_date'};
4317: my $now = time;
4318: foreach my $key (keys(%roleshash)) {
4319: if ($key =~ /^\Q$courseid\E\/(\w+)\_gr$/) {
4320: my $group = $1;
4321: if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
4322: my $start = $2;
4323: my $end = $1;
4324: if ($start == -1) { next; } # deleted from group
4325: if (($start!=0) && ($start>$now)) { next; }
4326: if (($end!=0) && ($end<$now)) {
4327: if ($access_end && $access_end < $now) {
4328: if ($access_end - $end < 86400) {
4329: push(@usersgroups,$group);
4330: }
4331: }
4332: next;
4333: }
4334: push(@usersgroups,$group);
4335: }
4336: }
4337: }
4338: @usersgroups = &sort_course_groups($courseid,@usersgroups);
4339: $grouplist = join(':',@usersgroups);
4340: &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
4341: }
4342: }
4343: return @usersgroups;
4344: }
4345:
4346: sub devalidate_getgroups_cache {
4347: my ($udom,$uname,$cdom,$cnum)=@_;
4348: my $courseid = $cdom.'_'.$cnum;
4349: $courseid=~s/\_/\//g;
4350: $courseid=~s/^(\w)/\/$1/;
4351: my $hashid="$udom:$uname:$courseid";
4352: &devalidate_cache_new('getgroups',$hashid);
4353: }
4354:
4355: # ------------------------------------------------------------------ Plain Text
4356:
4357: sub plaintext {
4358: my ($short,$type,$cid) = @_;
4359: if ($short =~ /^cr/) {
4360: return (split('/',$short))[-1];
4361: }
4362: if (!defined($cid)) {
4363: $cid = $env{'request.course.id'};
4364: }
4365: if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
4366: return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
4367: '.plaintext'});
4368: }
4369: my %rolenames = (
4370: Course => 'std',
4371: Group => 'alt1',
4372: );
4373: if (defined($type) &&
4374: defined($rolenames{$type}) &&
4375: defined($prp{$short}{$rolenames{$type}})) {
4376: return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
4377: } else {
4378: return &Apache::lonlocal::mt($prp{$short}{'std'});
4379: }
4380: }
4381:
4382: # ----------------------------------------------------------------- Assign Role
4383:
4384: sub assignrole {
4385: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
4386: my $mrole;
4387: if ($role =~ /^cr\//) {
4388: my $cwosec=$url;
4389: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4390: unless (&allowed('ccr',$cwosec)) {
4391: &logthis('Refused custom assignrole: '.
4392: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4393: $env{'user.name'}.' at '.$env{'user.domain'});
4394: return 'refused';
4395: }
4396: $mrole='cr';
4397: } elsif ($role =~ /^gr\//) {
4398: my $cwogrp=$url;
4399: $cwogrp=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4400: unless (&allowed('mdg',$cwogrp)) {
4401: &logthis('Refused group assignrole: '.
4402: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4403: $env{'user.name'}.' at '.$env{'user.domain'});
4404: return 'refused';
4405: }
4406: $mrole='gr';
4407: } else {
4408: my $cwosec=$url;
4409: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4410: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
4411: &logthis('Refused assignrole: '.
4412: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4413: $env{'user.name'}.' at '.$env{'user.domain'});
4414: return 'refused';
4415: }
4416: $mrole=$role;
4417: }
4418: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4419: "$udom:$uname:$url".'_'."$mrole=$role";
4420: if ($end) { $command.='_'.$end; }
4421: if ($start) {
4422: if ($end) {
4423: $command.='_'.$start;
4424: } else {
4425: $command.='_0_'.$start;
4426: }
4427: }
4428: my $origstart = $start;
4429: my $origend = $end;
4430: # actually delete
4431: if ($deleteflag) {
4432: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
4433: # modify command to delete the role
4434: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
4435: "$udom:$uname:$url".'_'."$mrole";
4436: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
4437: # set start and finish to negative values for userrolelog
4438: $start=-1;
4439: $end=-1;
4440: }
4441: }
4442: # send command
4443: my $answer=&reply($command,&homeserver($uname,$udom));
4444: # log new user role if status is ok
4445: if ($answer eq 'ok') {
4446: &userrolelog($role,$uname,$udom,$url,$start,$end);
4447: # for course roles, perform group memberships changes triggered by role change.
4448: unless ($role =~ /^gr/) {
4449: &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
4450: $origstart);
4451: }
4452: }
4453: return $answer;
4454: }
4455:
4456: # -------------------------------------------------- Modify user authentication
4457: # Overrides without validation
4458:
4459: sub modifyuserauth {
4460: my ($udom,$uname,$umode,$upass)=@_;
4461: my $uhome=&homeserver($uname,$udom);
4462: unless (&allowed('mau',$udom)) { return 'refused'; }
4463: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
4464: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4465: ' in domain '.$env{'request.role.domain'});
4466: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
4467: &escape($upass),$uhome);
4468: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
4469: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
4470: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4471: &log($udom,,$uname,$uhome,
4472: 'Authentication changed by '.$env{'user.domain'}.', '.
4473: $env{'user.name'}.', '.$umode.
4474: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4475: unless ($reply eq 'ok') {
4476: &logthis('Authentication mode error: '.$reply);
4477: return 'error: '.$reply;
4478: }
4479: return 'ok';
4480: }
4481:
4482: # --------------------------------------------------------------- Modify a user
4483:
4484: sub modifyuser {
4485: my ($udom, $uname, $uid,
4486: $umode, $upass, $first,
4487: $middle, $last, $gene,
4488: $forceid, $desiredhome, $email)=@_;
4489: $udom=~s/\W//g;
4490: $uname=~s/\W//g;
4491: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
4492: $umode.', '.$first.', '.$middle.', '.
4493: $last.', '.$gene.'(forceid: '.$forceid.')'.
4494: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
4495: ' desiredhome not specified').
4496: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4497: ' in domain '.$env{'request.role.domain'});
4498: my $uhome=&homeserver($uname,$udom,'true');
4499: # ----------------------------------------------------------------- Create User
4500: if (($uhome eq 'no_host') &&
4501: (($umode && $upass) || ($umode eq 'localauth'))) {
4502: my $unhome='';
4503: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
4504: $unhome = $desiredhome;
4505: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
4506: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
4507: } else { # load balancing routine for determining $unhome
4508: my $tryserver;
4509: my $loadm=10000000;
4510: foreach $tryserver (keys %libserv) {
4511: if ($hostdom{$tryserver} eq $udom) {
4512: my $answer=reply('load',$tryserver);
4513: if (($answer=~/\d+/) && ($answer<$loadm)) {
4514: $loadm=$answer;
4515: $unhome=$tryserver;
4516: }
4517: }
4518: }
4519: }
4520: if (($unhome eq '') || ($unhome eq 'no_host')) {
4521: return 'error: unable to find a home server for '.$uname.
4522: ' in domain '.$udom;
4523: }
4524: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
4525: &escape($upass),$unhome);
4526: unless ($reply eq 'ok') {
4527: return 'error: '.$reply;
4528: }
4529: $uhome=&homeserver($uname,$udom,'true');
4530: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
4531: return 'error: unable verify users home machine.';
4532: }
4533: } # End of creation of new user
4534: # ---------------------------------------------------------------------- Add ID
4535: if ($uid) {
4536: $uid=~tr/A-Z/a-z/;
4537: my %uidhash=&idrget($udom,$uname);
4538: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
4539: && (!$forceid)) {
4540: unless ($uid eq $uidhash{$uname}) {
4541: return 'error: user id "'.$uid.'" does not match '.
4542: 'current user id "'.$uidhash{$uname}.'".';
4543: }
4544: } else {
4545: &idput($udom,($uname => $uid));
4546: }
4547: }
4548: # -------------------------------------------------------------- Add names, etc
4549: my @tmp=&get('environment',
4550: ['firstname','middlename','lastname','generation'],
4551: $udom,$uname);
4552: my %names;
4553: if ($tmp[0] =~ m/^error:.*/) {
4554: %names=();
4555: } else {
4556: %names = @tmp;
4557: }
4558: #
4559: # Make sure to not trash student environment if instructor does not bother
4560: # to supply name and email information
4561: #
4562: if ($first) { $names{'firstname'} = $first; }
4563: if (defined($middle)) { $names{'middlename'} = $middle; }
4564: if ($last) { $names{'lastname'} = $last; }
4565: if (defined($gene)) { $names{'generation'} = $gene; }
4566: if ($email) {
4567: $email=~s/[^\w\@\.\-\,]//gs;
4568: if ($email=~/\@/) { $names{'notification'} = $email;
4569: $names{'critnotification'} = $email;
4570: $names{'permanentemail'} = $email; }
4571: }
4572: my $reply = &put('environment', \%names, $udom,$uname);
4573: if ($reply ne 'ok') { return 'error: '.$reply; }
4574: &devalidate_cache_new('namescache',$uname.':'.$udom);
4575: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4576: $umode.', '.$first.', '.$middle.', '.
4577: $last.', '.$gene.' by '.
4578: $env{'user.name'}.' at '.$env{'user.domain'});
4579: return 'ok';
4580: }
4581:
4582: # -------------------------------------------------------------- Modify student
4583:
4584: sub modifystudent {
4585: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4586: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4587: if (!$cid) {
4588: unless ($cid=$env{'request.course.id'}) {
4589: return 'not_in_class';
4590: }
4591: }
4592: # --------------------------------------------------------------- Make the user
4593: my $reply=&modifyuser
4594: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4595: $desiredhome,$email);
4596: unless ($reply eq 'ok') { return $reply; }
4597: # This will cause &modify_student_enrollment to get the uid from the
4598: # students environment
4599: $uid = undef if (!$forceid);
4600: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4601: $gene,$usec,$end,$start,$type,$locktype,$cid);
4602: return $reply;
4603: }
4604:
4605: sub modify_student_enrollment {
4606: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4607: my ($cdom,$cnum,$chome);
4608: if (!$cid) {
4609: unless ($cid=$env{'request.course.id'}) {
4610: return 'not_in_class';
4611: }
4612: $cdom=$env{'course.'.$cid.'.domain'};
4613: $cnum=$env{'course.'.$cid.'.num'};
4614: } else {
4615: ($cdom,$cnum)=split(/_/,$cid);
4616: }
4617: $chome=$env{'course.'.$cid.'.home'};
4618: if (!$chome) {
4619: $chome=&homeserver($cnum,$cdom);
4620: }
4621: if (!$chome) { return 'unknown_course'; }
4622: # Make sure the user exists
4623: my $uhome=&homeserver($uname,$udom);
4624: if (($uhome eq '') || ($uhome eq 'no_host')) {
4625: return 'error: no such user';
4626: }
4627: # Get student data if we were not given enough information
4628: if (!defined($first) || $first eq '' ||
4629: !defined($last) || $last eq '' ||
4630: !defined($uid) || $uid eq '' ||
4631: !defined($middle) || $middle eq '' ||
4632: !defined($gene) || $gene eq '') {
4633: # They did not supply us with enough data to enroll the student, so
4634: # we need to pick up more information.
4635: my %tmp = &get('environment',
4636: ['firstname','middlename','lastname', 'generation','id']
4637: ,$udom,$uname);
4638:
4639: #foreach (keys(%tmp)) {
4640: # &logthis("key $_ = ".$tmp{$_});
4641: #}
4642: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4643: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4644: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4645: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4646: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4647: }
4648: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4649: my $reply=cput('classlist',
4650: {"$uname:$udom" =>
4651: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4652: $cdom,$cnum);
4653: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4654: return 'error: '.$reply;
4655: } else {
4656: &devalidate_getsection_cache($udom,$uname,$cid);
4657: }
4658: # Add student role to user
4659: my $uurl='/'.$cid;
4660: $uurl=~s/\_/\//g;
4661: if ($usec) {
4662: $uurl.='/'.$usec;
4663: }
4664: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4665: }
4666:
4667: sub format_name {
4668: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4669: my $name;
4670: if ($first ne 'lastname') {
4671: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4672: } else {
4673: if ($lastname=~/\S/) {
4674: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4675: $name=~s/\s+,/,/;
4676: } else {
4677: $name.= $firstname.' '.$middlename.' '.$generation;
4678: }
4679: }
4680: $name=~s/^\s+//;
4681: $name=~s/\s+$//;
4682: $name=~s/\s+/ /g;
4683: return $name;
4684: }
4685:
4686: # ------------------------------------------------- Write to course preferences
4687:
4688: sub writecoursepref {
4689: my ($courseid,%prefs)=@_;
4690: $courseid=~s/^\///;
4691: $courseid=~s/\_/\//g;
4692: my ($cdomain,$cnum)=split(/\//,$courseid);
4693: my $chome=homeserver($cnum,$cdomain);
4694: if (($chome eq '') || ($chome eq 'no_host')) {
4695: return 'error: no such course';
4696: }
4697: my $cstring='';
4698: foreach (keys %prefs) {
4699: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
4700: }
4701: $cstring=~s/\&$//;
4702: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
4703: }
4704:
4705: # ---------------------------------------------------------- Make/modify course
4706:
4707: sub createcourse {
4708: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
4709: $course_owner,$crstype)=@_;
4710: $url=&declutter($url);
4711: my $cid='';
4712: unless (&allowed('ccc',$udom)) {
4713: return 'refused';
4714: }
4715: # ------------------------------------------------------------------- Create ID
4716: my $uname=int(1+rand(9)).
4717: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
4718: substr($$.time,0,5).unpack("H8",pack("I32",time)).
4719: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4720: # ----------------------------------------------- Make sure that does not exist
4721: my $uhome=&homeserver($uname,$udom,'true');
4722: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4723: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
4724: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4725: $uhome=&homeserver($uname,$udom,'true');
4726: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4727: return 'error: unable to generate unique course-ID';
4728: }
4729: }
4730: # ------------------------------------------------ Check supplied server name
4731: $course_server = $env{'user.homeserver'} if (! defined($course_server));
4732: if (! exists($libserv{$course_server})) {
4733: return 'error:bad server name '.$course_server;
4734: }
4735: # ------------------------------------------------------------- Make the course
4736: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
4737: $course_server);
4738: unless ($reply eq 'ok') { return 'error: '.$reply; }
4739: $uhome=&homeserver($uname,$udom,'true');
4740: if (($uhome eq '') || ($uhome eq 'no_host')) {
4741: return 'error: no such course';
4742: }
4743: # ----------------------------------------------------------------- Course made
4744: # log existence
4745: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
4746: ':'.&escape($inst_code).':'.&escape($course_owner).':'.
4747: &escape($crstype),$uhome);
4748: &flushcourselogs();
4749: # set toplevel url
4750: my $topurl=$url;
4751: unless ($nonstandard) {
4752: # ------------------------------------------ For standard courses, make top url
4753: my $mapurl=&clutter($url);
4754: if ($mapurl eq '/res/') { $mapurl=''; }
4755: $env{'form.initmap'}=(<<ENDINITMAP);
4756: <map>
4757: <resource id="1" type="start"></resource>
4758: <resource id="2" src="$mapurl"></resource>
4759: <resource id="3" type="finish"></resource>
4760: <link index="1" from="1" to="2"></link>
4761: <link index="2" from="2" to="3"></link>
4762: </map>
4763: ENDINITMAP
4764: $topurl=&declutter(
4765: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
4766: );
4767: }
4768: # ----------------------------------------------------------- Write preferences
4769: &writecoursepref($udom.'_'.$uname,
4770: ('description' => $description,
4771: 'url' => $topurl));
4772: return '/'.$udom.'/'.$uname;
4773: }
4774:
4775: # ---------------------------------------------------------- Assign Custom Role
4776:
4777: sub assigncustomrole {
4778: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
4779: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
4780: $end,$start,$deleteflag);
4781: }
4782:
4783: # ----------------------------------------------------------------- Revoke Role
4784:
4785: sub revokerole {
4786: my ($udom,$uname,$url,$role,$deleteflag)=@_;
4787: my $now=time;
4788: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
4789: }
4790:
4791: # ---------------------------------------------------------- Revoke Custom Role
4792:
4793: sub revokecustomrole {
4794: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
4795: my $now=time;
4796: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
4797: $deleteflag);
4798: }
4799:
4800: # ------------------------------------------------------------ Disk usage
4801: sub diskusage {
4802: my ($udom,$uname,$directoryRoot)=@_;
4803: $directoryRoot =~ s/\/$//;
4804: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
4805: return $listing;
4806: }
4807:
4808: sub is_locked {
4809: my ($file_name, $domain, $user) = @_;
4810: my @check;
4811: my $is_locked;
4812: push @check, $file_name;
4813: my %locked = &get('file_permissions',\@check,
4814: $env{'user.domain'},$env{'user.name'});
4815: my ($tmp)=keys(%locked);
4816: if ($tmp=~/^error:/) { undef(%locked); }
4817:
4818: if (ref($locked{$file_name}) eq 'ARRAY') {
4819: $is_locked = 'false';
4820: foreach my $entry (@{$locked{$file_name}}) {
4821: if (ref($entry) eq 'ARRAY') {
4822: $is_locked = 'true';
4823: last;
4824: }
4825: }
4826: } else {
4827: $is_locked = 'false';
4828: }
4829: }
4830:
4831: sub declutter_portfile {
4832: my ($file) = @_;
4833: &logthis("got $file");
4834: $file =~ s-^(/portfolio/|portfolio/)-/-;
4835: &logthis("ret $file");
4836: return $file;
4837: }
4838:
4839: # ------------------------------------------------------------- Mark as Read Only
4840:
4841: sub mark_as_readonly {
4842: my ($domain,$user,$files,$what) = @_;
4843: my %current_permissions = &dump('file_permissions',$domain,$user);
4844: my ($tmp)=keys(%current_permissions);
4845: if ($tmp=~/^error:/) { undef(%current_permissions); }
4846: foreach my $file (@{$files}) {
4847: $file = &declutter_portfile($file);
4848: push(@{$current_permissions{$file}},$what);
4849: }
4850: &put('file_permissions',\%current_permissions,$domain,$user);
4851: return;
4852: }
4853:
4854: # ------------------------------------------------------------Save Selected Files
4855:
4856: sub save_selected_files {
4857: my ($user, $path, @files) = @_;
4858: my $filename = $user."savedfiles";
4859: my @other_files = &files_not_in_path($user, $path);
4860: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4861: foreach my $file (@files) {
4862: print (OUT $env{'form.currentpath'}.$file."\n");
4863: }
4864: foreach my $file (@other_files) {
4865: print (OUT $file."\n");
4866: }
4867: close (OUT);
4868: return 'ok';
4869: }
4870:
4871: sub clear_selected_files {
4872: my ($user) = @_;
4873: my $filename = $user."savedfiles";
4874: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4875: print (OUT undef);
4876: close (OUT);
4877: return ("ok");
4878: }
4879:
4880: sub files_in_path {
4881: my ($user, $path) = @_;
4882: my $filename = $user."savedfiles";
4883: my %return_files;
4884: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4885: while (my $line_in = <IN>) {
4886: chomp ($line_in);
4887: my @paths_and_file = split (m!/!, $line_in);
4888: my $file_part = pop (@paths_and_file);
4889: my $path_part = join ('/', @paths_and_file);
4890: $path_part.='/';
4891: my $path_and_file = $path_part.$file_part;
4892: if ($path_part eq $path) {
4893: $return_files{$file_part}= 'selected';
4894: }
4895: }
4896: close (IN);
4897: return (\%return_files);
4898: }
4899:
4900: # called in portfolio select mode, to show files selected NOT in current directory
4901: sub files_not_in_path {
4902: my ($user, $path) = @_;
4903: my $filename = $user."savedfiles";
4904: my @return_files;
4905: my $path_part;
4906: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4907: while (<IN>) {
4908: #ok, I know it's clunky, but I want it to work
4909: my @paths_and_file = split m!/!, $_;
4910: my $file_part = pop (@paths_and_file);
4911: chomp ($file_part);
4912: my $path_part = join ('/', @paths_and_file);
4913: $path_part .= '/';
4914: my $path_and_file = $path_part.$file_part;
4915: if ($path_part ne $path) {
4916: push (@return_files, ($path_and_file));
4917: }
4918: }
4919: close (OUT);
4920: return (@return_files);
4921: }
4922:
4923: #----------------------------------------------Get portfolio file permissions
4924:
4925: sub get_portfile_permissions {
4926: my ($domain,$user) = @_;
4927: my %current_permissions = &dump('file_permissions',$domain,$user);
4928: my ($tmp)=keys(%current_permissions);
4929: if ($tmp=~/^error:/) { undef(%current_permissions); }
4930: return \%current_permissions;
4931: }
4932:
4933: #---------------------------------------------Get portfolio file access controls
4934:
4935: sub get_access_controls {
4936: my ($current_permissions,$group,$file) = @_;
4937: my %access;
4938: my $real_file = $file;
4939: $file =~ s/\.meta$//;
4940: if (defined($file)) {
4941: if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
4942: foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
4943: $access{$real_file}{$control} = $$current_permissions{$file."\0".$control};
4944: }
4945: }
4946: } else {
4947: foreach my $key (keys(%{$current_permissions})) {
4948: if ($key =~ /\0accesscontrol$/) {
4949: if (defined($group)) {
4950: if ($key !~ m-^\Q$group\E/-) {
4951: next;
4952: }
4953: }
4954: my ($fullpath) = split(/\0/,$key);
4955: if (ref($$current_permissions{$key}) eq 'HASH') {
4956: foreach my $control (keys(%{$$current_permissions{$key}})) {
4957: $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
4958: }
4959: }
4960: }
4961: }
4962: }
4963: return %access;
4964: }
4965:
4966: sub modify_access_controls {
4967: my ($file_name,$changes,$domain,$user)=@_;
4968: my ($outcome,$deloutcome);
4969: my %store_permissions;
4970: my %new_values;
4971: my %new_control;
4972: my %translation;
4973: my @deletions = ();
4974: my $now = time;
4975: if (exists($$changes{'activate'})) {
4976: if (ref($$changes{'activate'}) eq 'HASH') {
4977: my @newitems = sort(keys(%{$$changes{'activate'}}));
4978: my $numnew = scalar(@newitems);
4979: for (my $i=0; $i<$numnew; $i++) {
4980: my $newkey = $newitems[$i];
4981: my $newid = &Apache::loncommon::get_cgi_id();
4982: $newkey =~ s/^(\d+)/$newid/;
4983: $translation{$1} = $newid;
4984: $new_values{$file_name."\0".$newkey} =
4985: $$changes{'activate'}{$newitems[$i]};
4986: $new_control{$newkey} = $now;
4987: }
4988: }
4989: }
4990: my %todelete;
4991: my %changed_items;
4992: foreach my $action ('delete','update') {
4993: if (exists($$changes{$action})) {
4994: if (ref($$changes{$action}) eq 'HASH') {
4995: foreach my $key (keys(%{$$changes{$action}})) {
4996: my ($itemnum) = ($key =~ /^([^:]+):/);
4997: if ($action eq 'delete') {
4998: $todelete{$itemnum} = 1;
4999: } else {
5000: $changed_items{$itemnum} = $key;
5001: }
5002: }
5003: }
5004: }
5005: }
5006: # get lock on access controls for file.
5007: my $lockhash = {
5008: $file_name."\0".'locked_access_records' => $env{'user.name'}.
5009: ':'.$env{'user.domain'},
5010: };
5011: my $tries = 0;
5012: my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5013:
5014: while (($gotlock ne 'ok') && $tries <3) {
5015: $tries ++;
5016: sleep 1;
5017: $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5018: }
5019: if ($gotlock eq 'ok') {
5020: my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
5021: my ($tmp)=keys(%curr_permissions);
5022: if ($tmp=~/^error:/) { undef(%curr_permissions); }
5023: if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
5024: my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
5025: if (ref($curr_controls) eq 'HASH') {
5026: foreach my $control_item (keys(%{$curr_controls})) {
5027: my ($itemnum) = ($control_item =~ /^([^:]+):/);
5028: if (defined($todelete{$itemnum})) {
5029: push(@deletions,$file_name."\0".$control_item);
5030: } else {
5031: if (defined($changed_items{$itemnum})) {
5032: $new_control{$changed_items{$itemnum}} = $now;
5033: push(@deletions,$file_name."\0".$control_item);
5034: $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
5035: } else {
5036: $new_control{$control_item} = $$curr_controls{$control_item};
5037: }
5038: }
5039: }
5040: }
5041: }
5042: $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
5043: $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
5044: $outcome = &put('file_permissions',\%new_values,$domain,$user);
5045: # remove lock
5046: my @del_lock = ($file_name."\0".'locked_access_records');
5047: my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
5048: } else {
5049: $outcome = "error: could not obtain lockfile\n";
5050: }
5051: return ($outcome,$deloutcome,\%new_values,\%translation);
5052: }
5053:
5054: #------------------------------------------------------Get Marked as Read Only
5055:
5056: sub get_marked_as_readonly {
5057: my ($domain,$user,$what,$group) = @_;
5058: my $current_permissions = &get_portfile_permissions($domain,$user);
5059: my @readonly_files;
5060: my $cmp1=$what;
5061: if (ref($what)) { $cmp1=join('',@{$what}) };
5062: while (my ($file_name,$value) = each(%{$current_permissions})) {
5063: if (defined($group)) {
5064: if ($file_name !~ m-^\Q$group\E/-) {
5065: next;
5066: }
5067: }
5068: if (ref($value) eq "ARRAY"){
5069: foreach my $stored_what (@{$value}) {
5070: my $cmp2=$stored_what;
5071: if (ref($stored_what) eq 'ARRAY') {
5072: $cmp2=join('',@{$stored_what});
5073: }
5074: if ($cmp1 eq $cmp2) {
5075: push(@readonly_files, $file_name);
5076: last;
5077: } elsif (!defined($what)) {
5078: push(@readonly_files, $file_name);
5079: last;
5080: }
5081: }
5082: }
5083: }
5084: return @readonly_files;
5085: }
5086: #-----------------------------------------------------------Get Marked as Read Only Hash
5087:
5088: sub get_marked_as_readonly_hash {
5089: my ($current_permissions,$group,$what) = @_;
5090: my %readonly_files;
5091: while (my ($file_name,$value) = each(%{$current_permissions})) {
5092: if (defined($group)) {
5093: if ($file_name !~ m-^\Q$group\E/-) {
5094: next;
5095: }
5096: }
5097: if (ref($value) eq "ARRAY"){
5098: foreach my $stored_what (@{$value}) {
5099: if (ref($stored_what) eq 'ARRAY') {
5100: foreach my $lock_descriptor(@{$stored_what}) {
5101: if ($lock_descriptor eq 'graded') {
5102: $readonly_files{$file_name} = 'graded';
5103: } elsif ($lock_descriptor eq 'handback') {
5104: $readonly_files{$file_name} = 'handback';
5105: } else {
5106: if (!exists($readonly_files{$file_name})) {
5107: $readonly_files{$file_name} = 'locked';
5108: }
5109: }
5110: }
5111: }
5112: }
5113: }
5114: }
5115: return %readonly_files;
5116: }
5117: # ------------------------------------------------------------ Unmark as Read Only
5118:
5119: sub unmark_as_readonly {
5120: # unmarks $file_name (if $file_name is defined), or all files locked by $what
5121: # for portfolio submissions, $what contains [$symb,$crsid]
5122: my ($domain,$user,$what,$file_name,$group) = @_;
5123: $file_name = &declutter_portfile($file_name);
5124: my $symb_crs = $what;
5125: if (ref($what)) { $symb_crs=join('',@$what); }
5126: my %current_permissions = &dump('file_permissions',$domain,$user,$group);
5127: my ($tmp)=keys(%current_permissions);
5128: if ($tmp=~/^error:/) { undef(%current_permissions); }
5129: my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
5130: foreach my $file (@readonly_files) {
5131: my $clean_file = &declutter_portfile($file);
5132: if (defined($file_name) && ($file_name ne $clean_file)) { next; }
5133: my $current_locks = $current_permissions{$file};
5134: my @new_locks;
5135: my @del_keys;
5136: if (ref($current_locks) eq "ARRAY"){
5137: foreach my $locker (@{$current_locks}) {
5138: my $compare=$locker;
5139: if (ref($locker) eq 'ARRAY') {
5140: $compare=join('',@{$locker});
5141: if ($compare ne $symb_crs) {
5142: push(@new_locks, $locker);
5143: }
5144: }
5145: }
5146: if (scalar(@new_locks) > 0) {
5147: $current_permissions{$file} = \@new_locks;
5148: } else {
5149: push(@del_keys, $file);
5150: &del('file_permissions',\@del_keys, $domain, $user);
5151: delete($current_permissions{$file});
5152: }
5153: }
5154: }
5155: &put('file_permissions',\%current_permissions,$domain,$user);
5156: return;
5157: }
5158:
5159: # ------------------------------------------------------------ Directory lister
5160:
5161: sub dirlist {
5162: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
5163:
5164: $uri=~s/^\///;
5165: $uri=~s/\/$//;
5166: my ($udom, $uname);
5167: (undef,$udom,$uname)=split(/\//,$uri);
5168: if(defined($userdomain)) {
5169: $udom = $userdomain;
5170: }
5171: if(defined($username)) {
5172: $uname = $username;
5173: }
5174:
5175: my $dirRoot = $perlvar{'lonDocRoot'};
5176: if(defined($alternateDirectoryRoot)) {
5177: $dirRoot = $alternateDirectoryRoot;
5178: $dirRoot =~ s/\/$//;
5179: }
5180:
5181: if($udom) {
5182: if($uname) {
5183: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
5184: homeserver($uname,$udom));
5185: my @listing_results;
5186: if ($listing eq 'unknown_cmd') {
5187: $listing=reply('ls:'.$dirRoot.'/'.$uri,
5188: homeserver($uname,$udom));
5189: @listing_results = split(/:/,$listing);
5190: } else {
5191: @listing_results = map { &unescape($_); } split(/:/,$listing);
5192: }
5193: return @listing_results;
5194: } elsif(!defined($alternateDirectoryRoot)) {
5195: my $tryserver;
5196: my %allusers=();
5197: foreach $tryserver (keys %libserv) {
5198: if($hostdom{$tryserver} eq $udom) {
5199: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
5200: $udom, $tryserver);
5201: my @listing_results;
5202: if ($listing eq 'unknown_cmd') {
5203: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
5204: $udom, $tryserver);
5205: @listing_results = split(/:/,$listing);
5206: } else {
5207: @listing_results =
5208: map { &unescape($_); } split(/:/,$listing);
5209: }
5210: if ($listing_results[0] ne 'no_such_dir' &&
5211: $listing_results[0] ne 'empty' &&
5212: $listing_results[0] ne 'con_lost') {
5213: foreach (@listing_results) {
5214: my ($entry,@stat)=split(/&/,$_);
5215: $allusers{$entry}=1;
5216: }
5217: }
5218: }
5219: }
5220: my $alluserstr='';
5221: foreach (sort keys %allusers) {
5222: $alluserstr.=$_.'&user:';
5223: }
5224: $alluserstr=~s/:$//;
5225: return split(/:/,$alluserstr);
5226: } else {
5227: my @emptyResults = ();
5228: push(@emptyResults, 'missing user name');
5229: return split(':',@emptyResults);
5230: }
5231: } elsif(!defined($alternateDirectoryRoot)) {
5232: my $tryserver;
5233: my %alldom=();
5234: foreach $tryserver (keys %libserv) {
5235: $alldom{$hostdom{$tryserver}}=1;
5236: }
5237: my $alldomstr='';
5238: foreach (sort keys %alldom) {
5239: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
5240: }
5241: $alldomstr=~s/:$//;
5242: return split(/:/,$alldomstr);
5243: } else {
5244: my @emptyResults = ();
5245: push(@emptyResults, 'missing domain');
5246: return split(':',@emptyResults);
5247: }
5248: }
5249:
5250: # --------------------------------------------- GetFileTimestamp
5251: # This function utilizes dirlist and returns the date stamp for
5252: # when it was last modified. It will also return an error of -1
5253: # if an error occurs
5254:
5255: ##
5256: ## FIXME: This subroutine assumes its caller knows something about the
5257: ## directory structure of the home server for the student ($root).
5258: ## Not a good assumption to make. Since this is for looking up files
5259: ## in user directories, the full path should be constructed by lond, not
5260: ## whatever machine we request data from.
5261: ##
5262: sub GetFileTimestamp {
5263: my ($studentDomain,$studentName,$filename,$root)=@_;
5264: $studentDomain=~s/\W//g;
5265: $studentName=~s/\W//g;
5266: my $subdir=$studentName.'__';
5267: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
5268: my $proname="$studentDomain/$subdir/$studentName";
5269: $proname .= '/'.$filename;
5270: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
5271: $studentName, $root);
5272: my @stats = split('&', $fileStat);
5273: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5274: # @stats contains first the filename, then the stat output
5275: return $stats[10]; # so this is 10 instead of 9.
5276: } else {
5277: return -1;
5278: }
5279: }
5280:
5281: sub stat_file {
5282: my ($uri) = @_;
5283: $uri = &clutter($uri);
5284:
5285: # we want just the url part without the unneeded accessor url bits
5286: if ($uri =~ m-^/adm/-) {
5287: $uri=~s-^/adm/wrapper/-/-;
5288: $uri=~s-^/adm/coursedocs/showdoc/-/-;
5289: }
5290: my ($udom,$uname,$file,$dir);
5291: if ($uri =~ m-^/(uploaded|editupload)/-) {
5292: ($udom,$uname,$file) =
5293: ($uri =~ m-/(?:uploaded|editupload)/?([^/]*)/?([^/]*)/?(.*)-);
5294: $file = 'userfiles/'.$file;
5295: $dir = &propath($udom,$uname);
5296: }
5297: if ($uri =~ m-^/res/-) {
5298: ($udom,$uname) =
5299: ($uri =~ m-/(?:res)/?([^/]*)/?([^/]*)/-);
5300: $file = $uri;
5301: }
5302:
5303: if (!$udom || !$uname || !$file) {
5304: # unable to handle the uri
5305: return ();
5306: }
5307:
5308: my ($result) = &dirlist($file,$udom,$uname,$dir);
5309: my @stats = split('&', $result);
5310:
5311: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5312: shift(@stats); #filename is first
5313: return @stats;
5314: }
5315: return ();
5316: }
5317:
5318: # -------------------------------------------------------- Value of a Condition
5319:
5320: # gets the value of a specific preevaluated condition
5321: # stored in the string $env{user.state.<cid>}
5322: # or looks up a condition reference in the bighash and if if hasn't
5323: # already been evaluated recurses into docondval to get the value of
5324: # the condition, then memoizing it to
5325: # $env{user.state.<cid>.<condition>}
5326: sub directcondval {
5327: my $number=shift;
5328: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
5329: &Apache::lonuserstate::evalstate();
5330: }
5331: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
5332: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
5333: } elsif ($number =~ /^_/) {
5334: my $sub_condition;
5335: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5336: &GDBM_READER(),0640)) {
5337: $sub_condition=$bighash{'conditions'.$number};
5338: untie(%bighash);
5339: }
5340: my $value = &docondval($sub_condition);
5341: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
5342: return $value;
5343: }
5344: if ($env{'user.state.'.$env{'request.course.id'}}) {
5345: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
5346: } else {
5347: return 2;
5348: }
5349: }
5350:
5351: # get the collection of conditions for this resource
5352: sub condval {
5353: my $condidx=shift;
5354: my $allpathcond='';
5355: foreach my $cond (split(/\|/,$condidx)) {
5356: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
5357: $allpathcond.=
5358: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
5359: }
5360: }
5361: $allpathcond=~s/\|$//;
5362: return &docondval($allpathcond);
5363: }
5364:
5365: #evaluates an expression of conditions
5366: sub docondval {
5367: my ($allpathcond) = @_;
5368: my $result=0;
5369: if ($env{'request.course.id'}
5370: && defined($allpathcond)) {
5371: my $operand='|';
5372: my @stack;
5373: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
5374: if ($chunk eq '(') {
5375: push @stack,($operand,$result);
5376: } elsif ($chunk eq ')') {
5377: my $before=pop @stack;
5378: if (pop @stack eq '&') {
5379: $result=$result>$before?$before:$result;
5380: } else {
5381: $result=$result>$before?$result:$before;
5382: }
5383: } elsif (($chunk eq '&') || ($chunk eq '|')) {
5384: $operand=$chunk;
5385: } else {
5386: my $new=directcondval($chunk);
5387: if ($operand eq '&') {
5388: $result=$result>$new?$new:$result;
5389: } else {
5390: $result=$result>$new?$result:$new;
5391: }
5392: }
5393: }
5394: }
5395: return $result;
5396: }
5397:
5398: # ---------------------------------------------------- Devalidate courseresdata
5399:
5400: sub devalidatecourseresdata {
5401: my ($coursenum,$coursedomain)=@_;
5402: my $hashid=$coursenum.':'.$coursedomain;
5403: &devalidate_cache_new('courseres',$hashid);
5404: }
5405:
5406:
5407: # --------------------------------------------------- Course Resourcedata Query
5408:
5409: sub get_courseresdata {
5410: my ($coursenum,$coursedomain)=@_;
5411: my $coursehom=&homeserver($coursenum,$coursedomain);
5412: my $hashid=$coursenum.':'.$coursedomain;
5413: my ($result,$cached)=&is_cached_new('courseres',$hashid);
5414: my %dumpreply;
5415: unless (defined($cached)) {
5416: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
5417: $result=\%dumpreply;
5418: my ($tmp) = keys(%dumpreply);
5419: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
5420: &do_cache_new('courseres',$hashid,$result,600);
5421: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
5422: return $tmp;
5423: } elsif ($tmp =~ /^(error)/) {
5424: $result=undef;
5425: &do_cache_new('courseres',$hashid,$result,600);
5426: }
5427: }
5428: return $result;
5429: }
5430:
5431: sub devalidateuserresdata {
5432: my ($uname,$udom)=@_;
5433: my $hashid="$udom:$uname";
5434: &devalidate_cache_new('userres',$hashid);
5435: }
5436:
5437: sub get_userresdata {
5438: my ($uname,$udom)=@_;
5439: #most student don\'t have any data set, check if there is some data
5440: if (&EXT_cache_status($udom,$uname)) { return undef; }
5441:
5442: my $hashid="$udom:$uname";
5443: my ($result,$cached)=&is_cached_new('userres',$hashid);
5444: if (!defined($cached)) {
5445: my %resourcedata=&dump('resourcedata',$udom,$uname);
5446: $result=\%resourcedata;
5447: &do_cache_new('userres',$hashid,$result,600);
5448: }
5449: my ($tmp)=keys(%$result);
5450: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
5451: return $result;
5452: }
5453: #error 2 occurs when the .db doesn't exist
5454: if ($tmp!~/error: 2 /) {
5455: &logthis("<font color=\"blue\">WARNING:".
5456: " Trying to get resource data for ".
5457: $uname." at ".$udom.": ".
5458: $tmp."</font>");
5459: } elsif ($tmp=~/error: 2 /) {
5460: #&EXT_cache_set($udom,$uname);
5461: &do_cache_new('userres',$hashid,undef,600);
5462: undef($tmp); # not really an error so don't send it back
5463: }
5464: return $tmp;
5465: }
5466:
5467: sub resdata {
5468: my ($name,$domain,$type,@which)=@_;
5469: my $result;
5470: if ($type eq 'course') {
5471: $result=&get_courseresdata($name,$domain);
5472: } elsif ($type eq 'user') {
5473: $result=&get_userresdata($name,$domain);
5474: }
5475: if (!ref($result)) { return $result; }
5476: foreach my $item (@which) {
5477: if (defined($result->{$item})) {
5478: return $result->{$item};
5479: }
5480: }
5481: return undef;
5482: }
5483:
5484: #
5485: # EXT resource caching routines
5486: #
5487:
5488: sub clear_EXT_cache_status {
5489: &delenv('cache.EXT.');
5490: }
5491:
5492: sub EXT_cache_status {
5493: my ($target_domain,$target_user) = @_;
5494: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5495: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
5496: # We know already the user has no data
5497: return 1;
5498: } else {
5499: return 0;
5500: }
5501: }
5502:
5503: sub EXT_cache_set {
5504: my ($target_domain,$target_user) = @_;
5505: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5506: #&appenv($cachename => time);
5507: }
5508:
5509: # --------------------------------------------------------- Value of a Variable
5510: sub EXT {
5511:
5512: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
5513: unless ($varname) { return ''; }
5514: #get real user name/domain, courseid and symb
5515: my $courseid;
5516: my $publicuser;
5517: if ($symbparm) {
5518: $symbparm=&get_symb_from_alias($symbparm);
5519: }
5520: if (!($uname && $udom)) {
5521: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
5522: &Apache::lonxml::whichuser($symbparm);
5523: if (!$symbparm) { $symbparm=$cursymb; }
5524: } else {
5525: $courseid=$env{'request.course.id'};
5526: }
5527: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
5528: my $rest;
5529: if (defined($therest[0])) {
5530: $rest=join('.',@therest);
5531: } else {
5532: $rest='';
5533: }
5534:
5535: my $qualifierrest=$qualifier;
5536: if ($rest) { $qualifierrest.='.'.$rest; }
5537: my $spacequalifierrest=$space;
5538: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
5539: if ($realm eq 'user') {
5540: # --------------------------------------------------------------- user.resource
5541: if ($space eq 'resource') {
5542: if ( (defined($Apache::lonhomework::parsing_a_problem)
5543: || defined($Apache::lonhomework::parsing_a_task))
5544: &&
5545: ($symbparm eq &symbread()) ) {
5546: # if we are in the middle of processing the resource the
5547: # get the value we are planning on committing
5548: if (defined($Apache::lonhomework::results{$qualifierrest})) {
5549: return $Apache::lonhomework::results{$qualifierrest};
5550: } else {
5551: return $Apache::lonhomework::history{$qualifierrest};
5552: }
5553: } else {
5554: my %restored;
5555: if ($publicuser || $env{'request.state'} eq 'construct') {
5556: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
5557: } else {
5558: %restored=&restore($symbparm,$courseid,$udom,$uname);
5559: }
5560: return $restored{$qualifierrest};
5561: }
5562: # ----------------------------------------------------------------- user.access
5563: } elsif ($space eq 'access') {
5564: # FIXME - not supporting calls for a specific user
5565: return &allowed($qualifier,$rest);
5566: # ------------------------------------------ user.preferences, user.environment
5567: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
5568: if (($uname eq $env{'user.name'}) &&
5569: ($udom eq $env{'user.domain'})) {
5570: return $env{join('.',('environment',$qualifierrest))};
5571: } else {
5572: my %returnhash;
5573: if (!$publicuser) {
5574: %returnhash=&userenvironment($udom,$uname,
5575: $qualifierrest);
5576: }
5577: return $returnhash{$qualifierrest};
5578: }
5579: # ----------------------------------------------------------------- user.course
5580: } elsif ($space eq 'course') {
5581: # FIXME - not supporting calls for a specific user
5582: return $env{join('.',('request.course',$qualifier))};
5583: # ------------------------------------------------------------------- user.role
5584: } elsif ($space eq 'role') {
5585: # FIXME - not supporting calls for a specific user
5586: my ($role,$where)=split(/\./,$env{'request.role'});
5587: if ($qualifier eq 'value') {
5588: return $role;
5589: } elsif ($qualifier eq 'extent') {
5590: return $where;
5591: }
5592: # ----------------------------------------------------------------- user.domain
5593: } elsif ($space eq 'domain') {
5594: return $udom;
5595: # ------------------------------------------------------------------- user.name
5596: } elsif ($space eq 'name') {
5597: return $uname;
5598: # ---------------------------------------------------- Any other user namespace
5599: } else {
5600: my %reply;
5601: if (!$publicuser) {
5602: %reply=&get($space,[$qualifierrest],$udom,$uname);
5603: }
5604: return $reply{$qualifierrest};
5605: }
5606: } elsif ($realm eq 'query') {
5607: # ---------------------------------------------- pull stuff out of query string
5608: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
5609: [$spacequalifierrest]);
5610: return $env{'form.'.$spacequalifierrest};
5611: } elsif ($realm eq 'request') {
5612: # ------------------------------------------------------------- request.browser
5613: if ($space eq 'browser') {
5614: if ($qualifier eq 'textremote') {
5615: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
5616: return 1;
5617: } else {
5618: return 0;
5619: }
5620: } else {
5621: return $env{'browser.'.$qualifier};
5622: }
5623: # ------------------------------------------------------------ request.filename
5624: } else {
5625: return $env{'request.'.$spacequalifierrest};
5626: }
5627: } elsif ($realm eq 'course') {
5628: # ---------------------------------------------------------- course.description
5629: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
5630: } elsif ($realm eq 'resource') {
5631:
5632: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
5633: if (!$symbparm) { $symbparm=&symbread(); }
5634: }
5635:
5636: if ($space eq 'title') {
5637: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
5638: return &gettitle($symbparm);
5639: }
5640:
5641: if ($space eq 'map') {
5642: my ($map) = &decode_symb($symbparm);
5643: return &symbread($map);
5644: }
5645:
5646: my ($section, $group, @groups);
5647: my ($courselevelm,$courselevel);
5648: if ($symbparm && defined($courseid) &&
5649: $courseid eq $env{'request.course.id'}) {
5650:
5651: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
5652:
5653: # ----------------------------------------------------- Cascading lookup scheme
5654: my $symbp=$symbparm;
5655: my $mapp=&deversion((&decode_symb($symbp))[0]);
5656:
5657: my $symbparm=$symbp.'.'.$spacequalifierrest;
5658: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
5659:
5660: if (($env{'user.name'} eq $uname) &&
5661: ($env{'user.domain'} eq $udom)) {
5662: $section=$env{'request.course.sec'};
5663: @groups = split(/:/,$env{'request.course.groups'});
5664: @groups=&sort_course_groups($courseid,@groups);
5665: } else {
5666: if (! defined($usection)) {
5667: $section=&getsection($udom,$uname,$courseid);
5668: } else {
5669: $section = $usection;
5670: }
5671: @groups = &get_users_groups($udom,$uname,$courseid);
5672: }
5673:
5674: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
5675: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
5676: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
5677:
5678: $courselevel=$courseid.'.'.$spacequalifierrest;
5679: my $courselevelr=$courseid.'.'.$symbparm;
5680: $courselevelm=$courseid.'.'.$mapparm;
5681:
5682: # ----------------------------------------------------------- first, check user
5683:
5684: my $userreply=&resdata($uname,$udom,'user',
5685: ($courselevelr,$courselevelm,
5686: $courselevel));
5687: if (defined($userreply)) { return $userreply; }
5688:
5689: # ------------------------------------------------ second, check some of course
5690: my $coursereply;
5691: if (@groups > 0) {
5692: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
5693: $mapparm,$spacequalifierrest);
5694: if (defined($coursereply)) { return $coursereply; }
5695: }
5696:
5697: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5698: $env{'course.'.$courseid.'.domain'},
5699: 'course',
5700: ($seclevelr,$seclevelm,$seclevel,
5701: $courselevelr));
5702: if (defined($coursereply)) { return $coursereply; }
5703:
5704: # ------------------------------------------------------ third, check map parms
5705: my %parmhash=();
5706: my $thisparm='';
5707: if (tie(%parmhash,'GDBM_File',
5708: $env{'request.course.fn'}.'_parms.db',
5709: &GDBM_READER(),0640)) {
5710: $thisparm=$parmhash{$symbparm};
5711: untie(%parmhash);
5712: }
5713: if ($thisparm) { return $thisparm; }
5714: }
5715: # ------------------------------------------ fourth, look in resource metadata
5716:
5717: $spacequalifierrest=~s/\./\_/;
5718: my $filename;
5719: if (!$symbparm) { $symbparm=&symbread(); }
5720: if ($symbparm) {
5721: $filename=(&decode_symb($symbparm))[2];
5722: } else {
5723: $filename=$env{'request.filename'};
5724: }
5725: my $metadata=&metadata($filename,$spacequalifierrest);
5726: if (defined($metadata)) { return $metadata; }
5727: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
5728: if (defined($metadata)) { return $metadata; }
5729:
5730: # ---------------------------------------------- fourth, look in rest pf course
5731: if ($symbparm && defined($courseid) &&
5732: $courseid eq $env{'request.course.id'}) {
5733: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5734: $env{'course.'.$courseid.'.domain'},
5735: 'course',
5736: ($courselevelm,$courselevel));
5737: if (defined($coursereply)) { return $coursereply; }
5738: }
5739: # ------------------------------------------------------------------ Cascade up
5740: unless ($space eq '0') {
5741: my @parts=split(/_/,$space);
5742: my $id=pop(@parts);
5743: my $part=join('_',@parts);
5744: if ($part eq '') { $part='0'; }
5745: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
5746: $symbparm,$udom,$uname,$section,1);
5747: if (defined($partgeneral)) { return $partgeneral; }
5748: }
5749: if ($recurse) { return undef; }
5750: my $pack_def=&packages_tab_default($filename,$varname);
5751: if (defined($pack_def)) { return $pack_def; }
5752:
5753: # ---------------------------------------------------- Any other user namespace
5754: } elsif ($realm eq 'environment') {
5755: # ----------------------------------------------------------------- environment
5756: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
5757: return $env{'environment.'.$spacequalifierrest};
5758: } else {
5759: if ($uname eq 'anonymous' && $udom eq '') {
5760: return '';
5761: }
5762: my %returnhash=&userenvironment($udom,$uname,
5763: $spacequalifierrest);
5764: return $returnhash{$spacequalifierrest};
5765: }
5766: } elsif ($realm eq 'system') {
5767: # ----------------------------------------------------------------- system.time
5768: if ($space eq 'time') {
5769: return time;
5770: }
5771: } elsif ($realm eq 'server') {
5772: # ----------------------------------------------------------------- system.time
5773: if ($space eq 'name') {
5774: return $ENV{'SERVER_NAME'};
5775: }
5776: }
5777: return '';
5778: }
5779:
5780: sub check_group_parms {
5781: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
5782: my @groupitems = ();
5783: my $resultitem;
5784: my @levels = ($symbparm,$mapparm,$what);
5785: foreach my $group (@{$groups}) {
5786: foreach my $level (@levels) {
5787: my $item = $courseid.'.['.$group.'].'.$level;
5788: push(@groupitems,$item);
5789: }
5790: }
5791: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
5792: $env{'course.'.$courseid.'.domain'},
5793: 'course',@groupitems);
5794: return $coursereply;
5795: }
5796:
5797: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
5798: my ($courseid,@groups) = @_;
5799: @groups = sort(@groups);
5800: return @groups;
5801: }
5802:
5803: sub packages_tab_default {
5804: my ($uri,$varname)=@_;
5805: my (undef,$part,$name)=split(/\./,$varname);
5806:
5807: my (@extension,@specifics,$do_default);
5808: foreach my $package (split(/,/,&metadata($uri,'packages'))) {
5809: my ($pack_type,$pack_part)=split(/_/,$package,2);
5810: if ($pack_type eq 'default') {
5811: $do_default=1;
5812: } elsif ($pack_type eq 'extension') {
5813: push(@extension,[$package,$pack_type,$pack_part]);
5814: } else {
5815: push(@specifics,[$package,$pack_type,$pack_part]);
5816: }
5817: }
5818: # first look for a package that matches the requested part id
5819: foreach my $package (@specifics) {
5820: my (undef,$pack_type,$pack_part)=@{$package};
5821: next if ($pack_part ne $part);
5822: if (defined($packagetab{"$pack_type&$name&default"})) {
5823: return $packagetab{"$pack_type&$name&default"};
5824: }
5825: }
5826: # look for any possible matching non extension_ package
5827: foreach my $package (@specifics) {
5828: my (undef,$pack_type,$pack_part)=@{$package};
5829: if (defined($packagetab{"$pack_type&$name&default"})) {
5830: return $packagetab{"$pack_type&$name&default"};
5831: }
5832: if ($pack_type eq 'part') { $pack_part='0'; }
5833: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
5834: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
5835: }
5836: }
5837: # look for any posible extension_ match
5838: foreach my $package (@extension) {
5839: my ($package,$pack_type)=@{$package};
5840: if (defined($packagetab{"$pack_type&$name&default"})) {
5841: return $packagetab{"$pack_type&$name&default"};
5842: }
5843: if (defined($packagetab{$package."&$name&default"})) {
5844: return $packagetab{$package."&$name&default"};
5845: }
5846: }
5847: # look for a global default setting
5848: if ($do_default && defined($packagetab{"default&$name&default"})) {
5849: return $packagetab{"default&$name&default"};
5850: }
5851: return undef;
5852: }
5853:
5854: sub add_prefix_and_part {
5855: my ($prefix,$part)=@_;
5856: my $keyroot;
5857: if (defined($prefix) && $prefix !~ /^__/) {
5858: # prefix that has a part already
5859: $keyroot=$prefix;
5860: } elsif (defined($prefix)) {
5861: # prefix that is missing a part
5862: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
5863: } else {
5864: # no prefix at all
5865: if (defined($part)) { $keyroot='_'.$part; }
5866: }
5867: return $keyroot;
5868: }
5869:
5870: # ---------------------------------------------------------------- Get metadata
5871:
5872: my %metaentry;
5873: sub metadata {
5874: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
5875: $uri=&declutter($uri);
5876: # if it is a non metadata possible uri return quickly
5877: if (($uri eq '') ||
5878: (($uri =~ m|^/*adm/|) &&
5879: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
5880: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
5881: ($uri =~ m|home/[^/]+/public_html/|)) {
5882: return undef;
5883: }
5884: my $filename=$uri;
5885: $uri=~s/\.meta$//;
5886: #
5887: # Is the metadata already cached?
5888: # Look at timestamp of caching
5889: # Everything is cached by the main uri, libraries are never directly cached
5890: #
5891: if (!defined($liburi)) {
5892: my ($result,$cached)=&is_cached_new('meta',$uri);
5893: if (defined($cached)) { return $result->{':'.$what}; }
5894: }
5895: {
5896: #
5897: # Is this a recursive call for a library?
5898: #
5899: # if (! exists($metacache{$uri})) {
5900: # $metacache{$uri}={};
5901: # }
5902: if ($liburi) {
5903: $liburi=&declutter($liburi);
5904: $filename=$liburi;
5905: } else {
5906: &devalidate_cache_new('meta',$uri);
5907: undef(%metaentry);
5908: }
5909: my %metathesekeys=();
5910: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
5911: my $metastring;
5912: if ($uri !~ m -^(editupload)/-) {
5913: my $file=&filelocation('',&clutter($filename));
5914: #push(@{$metaentry{$uri.'.file'}},$file);
5915: $metastring=&getfile($file);
5916: }
5917: my $parser=HTML::LCParser->new(\$metastring);
5918: my $token;
5919: undef %metathesekeys;
5920: while ($token=$parser->get_token) {
5921: if ($token->[0] eq 'S') {
5922: if (defined($token->[2]->{'package'})) {
5923: #
5924: # This is a package - get package info
5925: #
5926: my $package=$token->[2]->{'package'};
5927: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5928: if (defined($token->[2]->{'id'})) {
5929: $keyroot.='_'.$token->[2]->{'id'};
5930: }
5931: if ($metaentry{':packages'}) {
5932: $metaentry{':packages'}.=','.$package.$keyroot;
5933: } else {
5934: $metaentry{':packages'}=$package.$keyroot;
5935: }
5936: foreach my $pack_entry (keys(%packagetab)) {
5937: my $part=$keyroot;
5938: $part=~s/^\_//;
5939: if ($pack_entry=~/^\Q$package\E\&/ ||
5940: $pack_entry=~/^\Q$package\E_0\&/) {
5941: my ($pack,$name,$subp)=split(/\&/,$pack_entry);
5942: # ignore package.tab specified default values
5943: # here &package_tab_default() will fetch those
5944: if ($subp eq 'default') { next; }
5945: my $value=$packagetab{$pack_entry};
5946: my $unikey;
5947: if ($pack =~ /_0$/) {
5948: $unikey='parameter_0_'.$name;
5949: $part=0;
5950: } else {
5951: $unikey='parameter'.$keyroot.'_'.$name;
5952: }
5953: if ($subp eq 'display') {
5954: $value.=' [Part: '.$part.']';
5955: }
5956: $metaentry{':'.$unikey.'.part'}=$part;
5957: $metathesekeys{$unikey}=1;
5958: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5959: $metaentry{':'.$unikey.'.'.$subp}=$value;
5960: }
5961: if (defined($metaentry{':'.$unikey.'.default'})) {
5962: $metaentry{':'.$unikey}=
5963: $metaentry{':'.$unikey.'.default'};
5964: }
5965: }
5966: }
5967: } else {
5968: #
5969: # This is not a package - some other kind of start tag
5970: #
5971: my $entry=$token->[1];
5972: my $unikey;
5973: if ($entry eq 'import') {
5974: $unikey='';
5975: } else {
5976: $unikey=$entry;
5977: }
5978: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5979:
5980: if (defined($token->[2]->{'id'})) {
5981: $unikey.='_'.$token->[2]->{'id'};
5982: }
5983:
5984: if ($entry eq 'import') {
5985: #
5986: # Importing a library here
5987: #
5988: if ($depthcount<20) {
5989: my $location=$parser->get_text('/import');
5990: my $dir=$filename;
5991: $dir=~s|[^/]*$||;
5992: $location=&filelocation($dir,$location);
5993: my $metadata =
5994: &metadata($uri,'keys', $location,$unikey,
5995: $depthcount+1);
5996: foreach my $meta (split(',',$metadata)) {
5997: $metaentry{':'.$meta}=$metaentry{':'.$meta};
5998: $metathesekeys{$meta}=1;
5999: }
6000: }
6001: } else {
6002:
6003: if (defined($token->[2]->{'name'})) {
6004: $unikey.='_'.$token->[2]->{'name'};
6005: }
6006: $metathesekeys{$unikey}=1;
6007: foreach my $param (@{$token->[3]}) {
6008: $metaentry{':'.$unikey.'.'.$param} =
6009: $token->[2]->{$param};
6010: }
6011: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
6012: my $default=$metaentry{':'.$unikey.'.default'};
6013: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
6014: # only ws inside the tag, and not in default, so use default
6015: # as value
6016: $metaentry{':'.$unikey}=$default;
6017: } else {
6018: # either something interesting inside the tag or default
6019: # uninteresting
6020: $metaentry{':'.$unikey}=$internaltext;
6021: }
6022: # end of not-a-package not-a-library import
6023: }
6024: # end of not-a-package start tag
6025: }
6026: # the next is the end of "start tag"
6027: }
6028: }
6029: my ($extension) = ($uri =~ /\.(\w+)$/);
6030: foreach my $key (keys(%packagetab)) {
6031: #no specific packages #how's our extension
6032: if ($key!~/^extension_\Q$extension\E&/) { next; }
6033: &metadata_create_package_def($uri,$key,'extension_'.$extension,
6034: \%metathesekeys);
6035: }
6036: if (!exists($metaentry{':packages'})) {
6037: foreach my $key (keys(%packagetab)) {
6038: #no specific packages well let's get default then
6039: if ($key!~/^default&/) { next; }
6040: &metadata_create_package_def($uri,$key,'default',
6041: \%metathesekeys);
6042: }
6043: }
6044: # are there custom rights to evaluate
6045: if ($metaentry{':copyright'} eq 'custom') {
6046:
6047: #
6048: # Importing a rights file here
6049: #
6050: unless ($depthcount) {
6051: my $location=$metaentry{':customdistributionfile'};
6052: my $dir=$filename;
6053: $dir=~s|[^/]*$||;
6054: $location=&filelocation($dir,$location);
6055: my $rights_metadata =
6056: &metadata($uri,'keys',$location,'_rights',
6057: $depthcount+1);
6058: foreach my $rights (split(',',$rights_metadata)) {
6059: #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
6060: $metathesekeys{$rights}=1;
6061: }
6062: }
6063: }
6064: # uniqifiy package listing
6065: my %seen;
6066: my @uniq_packages =
6067: grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
6068: $metaentry{':packages'} = join(',',@uniq_packages);
6069:
6070: $metaentry{':keys'} = join(',',keys(%metathesekeys));
6071: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
6072: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
6073: &do_cache_new('meta',$uri,\%metaentry,60*60);
6074: # this is the end of "was not already recently cached
6075: }
6076: return $metaentry{':'.$what};
6077: }
6078:
6079: sub metadata_create_package_def {
6080: my ($uri,$key,$package,$metathesekeys)=@_;
6081: my ($pack,$name,$subp)=split(/\&/,$key);
6082: if ($subp eq 'default') { next; }
6083:
6084: if (defined($metaentry{':packages'})) {
6085: $metaentry{':packages'}.=','.$package;
6086: } else {
6087: $metaentry{':packages'}=$package;
6088: }
6089: my $value=$packagetab{$key};
6090: my $unikey;
6091: $unikey='parameter_0_'.$name;
6092: $metaentry{':'.$unikey.'.part'}=0;
6093: $$metathesekeys{$unikey}=1;
6094: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6095: $metaentry{':'.$unikey.'.'.$subp}=$value;
6096: }
6097: if (defined($metaentry{':'.$unikey.'.default'})) {
6098: $metaentry{':'.$unikey}=
6099: $metaentry{':'.$unikey.'.default'};
6100: }
6101: }
6102:
6103: sub metadata_generate_part0 {
6104: my ($metadata,$metacache,$uri) = @_;
6105: my %allnames;
6106: foreach my $metakey (keys(%$metadata)) {
6107: if ($metakey=~/^parameter\_(.*)/) {
6108: my $part=$$metacache{':'.$metakey.'.part'};
6109: my $name=$$metacache{':'.$metakey.'.name'};
6110: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
6111: $allnames{$name}=$part;
6112: }
6113: }
6114: }
6115: foreach my $name (keys(%allnames)) {
6116: $$metadata{"parameter_0_$name"}=1;
6117: my $key=":parameter_0_$name";
6118: $$metacache{"$key.part"}='0';
6119: $$metacache{"$key.name"}=$name;
6120: $$metacache{"$key.type"}=$$metacache{':parameter_'.
6121: $allnames{$name}.'_'.$name.
6122: '.type'};
6123: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
6124: '.display'};
6125: my $expr='[Part: '.$allnames{$name}.']';
6126: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
6127: $$metacache{"$key.display"}=$olddis;
6128: }
6129: }
6130:
6131: # ------------------------------------------------------ Devalidate title cache
6132:
6133: sub devalidate_title_cache {
6134: my ($url)=@_;
6135: if (!$env{'request.course.id'}) { return; }
6136: my $symb=&symbread($url);
6137: if (!$symb) { return; }
6138: my $key=$env{'request.course.id'}."\0".$symb;
6139: &devalidate_cache_new('title',$key);
6140: }
6141:
6142: # ------------------------------------------------- Get the title of a resource
6143:
6144: sub gettitle {
6145: my $urlsymb=shift;
6146: my $symb=&symbread($urlsymb);
6147: if ($symb) {
6148: my $key=$env{'request.course.id'}."\0".$symb;
6149: my ($result,$cached)=&is_cached_new('title',$key);
6150: if (defined($cached)) {
6151: return $result;
6152: }
6153: my ($map,$resid,$url)=&decode_symb($symb);
6154: my $title='';
6155: my %bighash;
6156: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6157: &GDBM_READER(),0640)) {
6158: my $mapid=$bighash{'map_pc_'.&clutter($map)};
6159: $title=$bighash{'title_'.$mapid.'.'.$resid};
6160: untie %bighash;
6161: }
6162: $title=~s/\&colon\;/\:/gs;
6163: if ($title) {
6164: return &do_cache_new('title',$key,$title,600);
6165: }
6166: $urlsymb=$url;
6167: }
6168: my $title=&metadata($urlsymb,'title');
6169: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
6170: return $title;
6171: }
6172:
6173: sub get_slot {
6174: my ($which,$cnum,$cdom)=@_;
6175: if (!$cnum || !$cdom) {
6176: (undef,my $courseid)=&Apache::lonxml::whichuser();
6177: $cdom=$env{'course.'.$courseid.'.domain'};
6178: $cnum=$env{'course.'.$courseid.'.num'};
6179: }
6180: my $key=join("\0",'slots',$cdom,$cnum,$which);
6181: my %slotinfo;
6182: if (exists($remembered{$key})) {
6183: $slotinfo{$which} = $remembered{$key};
6184: } else {
6185: %slotinfo=&get('slots',[$which],$cdom,$cnum);
6186: &Apache::lonhomework::showhash(%slotinfo);
6187: my ($tmp)=keys(%slotinfo);
6188: if ($tmp=~/^error:/) { return (); }
6189: $remembered{$key} = $slotinfo{$which};
6190: }
6191: if (ref($slotinfo{$which}) eq 'HASH') {
6192: return %{$slotinfo{$which}};
6193: }
6194: return $slotinfo{$which};
6195: }
6196: # ------------------------------------------------- Update symbolic store links
6197:
6198: sub symblist {
6199: my ($mapname,%newhash)=@_;
6200: $mapname=&deversion(&declutter($mapname));
6201: my %hash;
6202: if (($env{'request.course.fn'}) && (%newhash)) {
6203: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6204: &GDBM_WRCREAT(),0640)) {
6205: foreach my $url (keys %newhash) {
6206: next if ($url eq 'last_known'
6207: && $env{'form.no_update_last_known'});
6208: $hash{declutter($url)}=&encode_symb($mapname,
6209: $newhash{$url}->[1],
6210: $newhash{$url}->[0]);
6211: }
6212: if (untie(%hash)) {
6213: return 'ok';
6214: }
6215: }
6216: }
6217: return 'error';
6218: }
6219:
6220: # --------------------------------------------------------------- Verify a symb
6221:
6222: sub symbverify {
6223: my ($symb,$thisurl)=@_;
6224: my $thisfn=$thisurl;
6225: # wrapper not part of symbs
6226: $thisfn=~s/^\/adm\/wrapper//;
6227: $thisfn=~s/^\/adm\/coursedocs\/showdoc\///;
6228: $thisfn=&declutter($thisfn);
6229: # direct jump to resource in page or to a sequence - will construct own symbs
6230: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
6231: # check URL part
6232: my ($map,$resid,$url)=&decode_symb($symb);
6233:
6234: unless ($url eq $thisfn) { return 0; }
6235:
6236: $symb=&symbclean($symb);
6237: $thisurl=&deversion($thisurl);
6238: $thisfn=&deversion($thisfn);
6239:
6240: my %bighash;
6241: my $okay=0;
6242:
6243: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6244: &GDBM_READER(),0640)) {
6245: my $ids=$bighash{'ids_'.&clutter($thisurl)};
6246: unless ($ids) {
6247: $ids=$bighash{'ids_/'.$thisurl};
6248: }
6249: if ($ids) {
6250: # ------------------------------------------------------------------- Has ID(s)
6251: foreach (split(/\,/,$ids)) {
6252: my ($mapid,$resid)=split(/\./,$_);
6253: if (
6254: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
6255: eq $symb) {
6256: if (($env{'request.role.adv'}) ||
6257: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
6258: $okay=1;
6259: }
6260: }
6261: }
6262: }
6263: untie(%bighash);
6264: }
6265: return $okay;
6266: }
6267:
6268: # --------------------------------------------------------------- Clean-up symb
6269:
6270: sub symbclean {
6271: my $symb=shift;
6272: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6273: # remove version from map
6274: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
6275:
6276: # remove version from URL
6277: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
6278:
6279: # remove wrapper
6280:
6281: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
6282: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
6283: return $symb;
6284: }
6285:
6286: # ---------------------------------------------- Split symb to find map and url
6287:
6288: sub encode_symb {
6289: my ($map,$resid,$url)=@_;
6290: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
6291: }
6292:
6293: sub decode_symb {
6294: my $symb=shift;
6295: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6296: my ($map,$resid,$url)=split(/___/,$symb);
6297: return (&fixversion($map),$resid,&fixversion($url));
6298: }
6299:
6300: sub fixversion {
6301: my $fn=shift;
6302: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
6303: my %bighash;
6304: my $uri=&clutter($fn);
6305: my $key=$env{'request.course.id'}.'_'.$uri;
6306: # is this cached?
6307: my ($result,$cached)=&is_cached_new('courseresversion',$key);
6308: if (defined($cached)) { return $result; }
6309: # unfortunately not cached, or expired
6310: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6311: &GDBM_READER(),0640)) {
6312: if ($bighash{'version_'.$uri}) {
6313: my $version=$bighash{'version_'.$uri};
6314: unless (($version eq 'mostrecent') ||
6315: ($version==&getversion($uri))) {
6316: $uri=~s/\.(\w+)$/\.$version\.$1/;
6317: }
6318: }
6319: untie %bighash;
6320: }
6321: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
6322: }
6323:
6324: sub deversion {
6325: my $url=shift;
6326: $url=~s/\.\d+\.(\w+)$/\.$1/;
6327: return $url;
6328: }
6329:
6330: # ------------------------------------------------------ Return symb list entry
6331:
6332: sub symbread {
6333: my ($thisfn,$donotrecurse)=@_;
6334: my $cache_str='request.symbread.cached.'.$thisfn;
6335: if (defined($env{$cache_str})) { return $env{$cache_str}; }
6336: # no filename provided? try from environment
6337: unless ($thisfn) {
6338: if ($env{'request.symb'}) {
6339: return $env{$cache_str}=&symbclean($env{'request.symb'});
6340: }
6341: $thisfn=$env{'request.filename'};
6342: }
6343: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6344: # is that filename actually a symb? Verify, clean, and return
6345: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
6346: if (&symbverify($thisfn,$1)) {
6347: return $env{$cache_str}=&symbclean($thisfn);
6348: }
6349: }
6350: $thisfn=declutter($thisfn);
6351: my %hash;
6352: my %bighash;
6353: my $syval='';
6354: if (($env{'request.course.fn'}) && ($thisfn)) {
6355: my $targetfn = $thisfn;
6356: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
6357: $targetfn = 'adm/wrapper/'.$thisfn;
6358: }
6359: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
6360: $targetfn=$1;
6361: }
6362: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6363: &GDBM_READER(),0640)) {
6364: $syval=$hash{$targetfn};
6365: untie(%hash);
6366: }
6367: # ---------------------------------------------------------- There was an entry
6368: if ($syval) {
6369: #unless ($syval=~/\_\d+$/) {
6370: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
6371: #&appenv('request.ambiguous' => $thisfn);
6372: #return $env{$cache_str}='';
6373: #}
6374: #$syval.=$1;
6375: #}
6376: } else {
6377: # ------------------------------------------------------- Was not in symb table
6378: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6379: &GDBM_READER(),0640)) {
6380: # ---------------------------------------------- Get ID(s) for current resource
6381: my $ids=$bighash{'ids_'.&clutter($thisfn)};
6382: unless ($ids) {
6383: $ids=$bighash{'ids_/'.$thisfn};
6384: }
6385: unless ($ids) {
6386: # alias?
6387: $ids=$bighash{'mapalias_'.$thisfn};
6388: }
6389: if ($ids) {
6390: # ------------------------------------------------------------------- Has ID(s)
6391: my @possibilities=split(/\,/,$ids);
6392: if ($#possibilities==0) {
6393: # ----------------------------------------------- There is only one possibility
6394: my ($mapid,$resid)=split(/\./,$ids);
6395: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6396: $resid,$thisfn);
6397: } elsif (!$donotrecurse) {
6398: # ------------------------------------------ There is more than one possibility
6399: my $realpossible=0;
6400: foreach (@possibilities) {
6401: my $file=$bighash{'src_'.$_};
6402: if (&allowed('bre',$file)) {
6403: my ($mapid,$resid)=split(/\./,$_);
6404: if ($bighash{'map_type_'.$mapid} ne 'page') {
6405: $realpossible++;
6406: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6407: $resid,$thisfn);
6408: }
6409: }
6410: }
6411: if ($realpossible!=1) { $syval=''; }
6412: } else {
6413: $syval='';
6414: }
6415: }
6416: untie(%bighash)
6417: }
6418: }
6419: if ($syval) {
6420: return $env{$cache_str}=$syval;
6421: }
6422: }
6423: &appenv('request.ambiguous' => $thisfn);
6424: return $env{$cache_str}='';
6425: }
6426:
6427: # ---------------------------------------------------------- Return random seed
6428:
6429: sub numval {
6430: my $txt=shift;
6431: $txt=~tr/A-J/0-9/;
6432: $txt=~tr/a-j/0-9/;
6433: $txt=~tr/K-T/0-9/;
6434: $txt=~tr/k-t/0-9/;
6435: $txt=~tr/U-Z/0-5/;
6436: $txt=~tr/u-z/0-5/;
6437: $txt=~s/\D//g;
6438: if ($_64bit) { if ($txt > 2**32) { return -1; } }
6439: return int($txt);
6440: }
6441:
6442: sub numval2 {
6443: my $txt=shift;
6444: $txt=~tr/A-J/0-9/;
6445: $txt=~tr/a-j/0-9/;
6446: $txt=~tr/K-T/0-9/;
6447: $txt=~tr/k-t/0-9/;
6448: $txt=~tr/U-Z/0-5/;
6449: $txt=~tr/u-z/0-5/;
6450: $txt=~s/\D//g;
6451: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6452: my $total;
6453: foreach my $val (@txts) { $total+=$val; }
6454: if ($_64bit) { if ($total > 2**32) { return -1; } }
6455: return int($total);
6456: }
6457:
6458: sub numval3 {
6459: use integer;
6460: my $txt=shift;
6461: $txt=~tr/A-J/0-9/;
6462: $txt=~tr/a-j/0-9/;
6463: $txt=~tr/K-T/0-9/;
6464: $txt=~tr/k-t/0-9/;
6465: $txt=~tr/U-Z/0-5/;
6466: $txt=~tr/u-z/0-5/;
6467: $txt=~s/\D//g;
6468: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6469: my $total;
6470: foreach my $val (@txts) { $total+=$val; }
6471: if ($_64bit) { $total=(($total<<32)>>32); }
6472: return $total;
6473: }
6474:
6475: sub digest {
6476: my ($data)=@_;
6477: my $digest=&Digest::MD5::md5($data);
6478: my ($a,$b,$c,$d)=unpack("iiii",$digest);
6479: my ($e,$f);
6480: {
6481: use integer;
6482: $e=($a+$b);
6483: $f=($c+$d);
6484: if ($_64bit) {
6485: $e=(($e<<32)>>32);
6486: $f=(($f<<32)>>32);
6487: }
6488: }
6489: if (wantarray) {
6490: return ($e,$f);
6491: } else {
6492: my $g;
6493: {
6494: use integer;
6495: $g=($e+$f);
6496: if ($_64bit) {
6497: $g=(($g<<32)>>32);
6498: }
6499: }
6500: return $g;
6501: }
6502: }
6503:
6504: sub latest_rnd_algorithm_id {
6505: return '64bit5';
6506: }
6507:
6508: sub get_rand_alg {
6509: my ($courseid)=@_;
6510: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
6511: if ($courseid) {
6512: return $env{"course.$courseid.rndseed"};
6513: }
6514: return &latest_rnd_algorithm_id();
6515: }
6516:
6517: sub validCODE {
6518: my ($CODE)=@_;
6519: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
6520: return 0;
6521: }
6522:
6523: sub getCODE {
6524: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
6525: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
6526: defined($Apache::lonhomework::parsing_a_task) ) &&
6527: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
6528: return $Apache::lonhomework::history{'resource.CODE'};
6529: }
6530: return undef;
6531: }
6532:
6533: sub rndseed {
6534: my ($symb,$courseid,$domain,$username)=@_;
6535:
6536: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
6537: if (!$symb) {
6538: unless ($symb=$wsymb) { return time; }
6539: }
6540: if (!$courseid) { $courseid=$wcourseid; }
6541: if (!$domain) { $domain=$wdomain; }
6542: if (!$username) { $username=$wusername }
6543: my $which=&get_rand_alg();
6544: if (defined(&getCODE())) {
6545: if ($which eq '64bit5') {
6546: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
6547: } elsif ($which eq '64bit4') {
6548: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
6549: } else {
6550: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
6551: }
6552: } elsif ($which eq '64bit5') {
6553: return &rndseed_64bit5($symb,$courseid,$domain,$username);
6554: } elsif ($which eq '64bit4') {
6555: return &rndseed_64bit4($symb,$courseid,$domain,$username);
6556: } elsif ($which eq '64bit3') {
6557: return &rndseed_64bit3($symb,$courseid,$domain,$username);
6558: } elsif ($which eq '64bit2') {
6559: return &rndseed_64bit2($symb,$courseid,$domain,$username);
6560: } elsif ($which eq '64bit') {
6561: return &rndseed_64bit($symb,$courseid,$domain,$username);
6562: }
6563: return &rndseed_32bit($symb,$courseid,$domain,$username);
6564: }
6565:
6566: sub rndseed_32bit {
6567: my ($symb,$courseid,$domain,$username)=@_;
6568: {
6569: use integer;
6570: my $symbchck=unpack("%32C*",$symb) << 27;
6571: my $symbseed=numval($symb) << 22;
6572: my $namechck=unpack("%32C*",$username) << 17;
6573: my $nameseed=numval($username) << 12;
6574: my $domainseed=unpack("%32C*",$domain) << 7;
6575: my $courseseed=unpack("%32C*",$courseid);
6576: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
6577: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6578: #&Apache::lonxml::debug("rndseed :$num:$symb");
6579: if ($_64bit) { $num=(($num<<32)>>32); }
6580: return $num;
6581: }
6582: }
6583:
6584: sub rndseed_64bit {
6585: my ($symb,$courseid,$domain,$username)=@_;
6586: {
6587: use integer;
6588: my $symbchck=unpack("%32S*",$symb) << 21;
6589: my $symbseed=numval($symb) << 10;
6590: my $namechck=unpack("%32S*",$username);
6591:
6592: my $nameseed=numval($username) << 21;
6593: my $domainseed=unpack("%32S*",$domain) << 10;
6594: my $courseseed=unpack("%32S*",$courseid);
6595:
6596: my $num1=$symbchck+$symbseed+$namechck;
6597: my $num2=$nameseed+$domainseed+$courseseed;
6598: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6599: #&Apache::lonxml::debug("rndseed :$num:$symb");
6600: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6601: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6602: return "$num1,$num2";
6603: }
6604: }
6605:
6606: sub rndseed_64bit2 {
6607: my ($symb,$courseid,$domain,$username)=@_;
6608: {
6609: use integer;
6610: # strings need to be an even # of cahracters long, it it is odd the
6611: # last characters gets thrown away
6612: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6613: my $symbseed=numval($symb) << 10;
6614: my $namechck=unpack("%32S*",$username.' ');
6615:
6616: my $nameseed=numval($username) << 21;
6617: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6618: my $courseseed=unpack("%32S*",$courseid.' ');
6619:
6620: my $num1=$symbchck+$symbseed+$namechck;
6621: my $num2=$nameseed+$domainseed+$courseseed;
6622: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6623: #&Apache::lonxml::debug("rndseed :$num:$symb");
6624: return "$num1,$num2";
6625: }
6626: }
6627:
6628: sub rndseed_64bit3 {
6629: my ($symb,$courseid,$domain,$username)=@_;
6630: {
6631: use integer;
6632: # strings need to be an even # of cahracters long, it it is odd the
6633: # last characters gets thrown away
6634: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6635: my $symbseed=numval2($symb) << 10;
6636: my $namechck=unpack("%32S*",$username.' ');
6637:
6638: my $nameseed=numval2($username) << 21;
6639: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6640: my $courseseed=unpack("%32S*",$courseid.' ');
6641:
6642: my $num1=$symbchck+$symbseed+$namechck;
6643: my $num2=$nameseed+$domainseed+$courseseed;
6644: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6645: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
6646: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6647:
6648: return "$num1:$num2";
6649: }
6650: }
6651:
6652: sub rndseed_64bit4 {
6653: my ($symb,$courseid,$domain,$username)=@_;
6654: {
6655: use integer;
6656: # strings need to be an even # of cahracters long, it it is odd the
6657: # last characters gets thrown away
6658: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6659: my $symbseed=numval3($symb) << 10;
6660: my $namechck=unpack("%32S*",$username.' ');
6661:
6662: my $nameseed=numval3($username) << 21;
6663: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6664: my $courseseed=unpack("%32S*",$courseid.' ');
6665:
6666: my $num1=$symbchck+$symbseed+$namechck;
6667: my $num2=$nameseed+$domainseed+$courseseed;
6668: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6669: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
6670: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6671:
6672: return "$num1:$num2";
6673: }
6674: }
6675:
6676: sub rndseed_64bit5 {
6677: my ($symb,$courseid,$domain,$username)=@_;
6678: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
6679: return "$num1:$num2";
6680: }
6681:
6682: sub rndseed_CODE_64bit {
6683: my ($symb,$courseid,$domain,$username)=@_;
6684: {
6685: use integer;
6686: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6687: my $symbseed=numval2($symb);
6688: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6689: my $CODEseed=numval(&getCODE());
6690: my $courseseed=unpack("%32S*",$courseid.' ');
6691: my $num1=$symbseed+$CODEchck;
6692: my $num2=$CODEseed+$courseseed+$symbchck;
6693: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6694: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
6695: if ($_64bit) { $num1=(($num1<<32)>>32); }
6696: if ($_64bit) { $num2=(($num2<<32)>>32); }
6697: return "$num1:$num2";
6698: }
6699: }
6700:
6701: sub rndseed_CODE_64bit4 {
6702: my ($symb,$courseid,$domain,$username)=@_;
6703: {
6704: use integer;
6705: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6706: my $symbseed=numval3($symb);
6707: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6708: my $CODEseed=numval3(&getCODE());
6709: my $courseseed=unpack("%32S*",$courseid.' ');
6710: my $num1=$symbseed+$CODEchck;
6711: my $num2=$CODEseed+$courseseed+$symbchck;
6712: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6713: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
6714: if ($_64bit) { $num1=(($num1<<32)>>32); }
6715: if ($_64bit) { $num2=(($num2<<32)>>32); }
6716: return "$num1:$num2";
6717: }
6718: }
6719:
6720: sub rndseed_CODE_64bit5 {
6721: my ($symb,$courseid,$domain,$username)=@_;
6722: my $code = &getCODE();
6723: my ($num1,$num2)=&digest("$symb,$courseid,$code");
6724: return "$num1:$num2";
6725: }
6726:
6727: sub setup_random_from_rndseed {
6728: my ($rndseed)=@_;
6729: if ($rndseed =~/([,:])/) {
6730: my ($num1,$num2)=split(/[,:]/,$rndseed);
6731: &Math::Random::random_set_seed(abs($num1),abs($num2));
6732: } else {
6733: &Math::Random::random_set_seed_from_phrase($rndseed);
6734: }
6735: }
6736:
6737: sub latest_receipt_algorithm_id {
6738: return 'receipt2';
6739: }
6740:
6741: sub recunique {
6742: my $fucourseid=shift;
6743: my $unique;
6744: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6745: $unique=$env{"course.$fucourseid.internal.encseed"};
6746: } else {
6747: $unique=$perlvar{'lonReceipt'};
6748: }
6749: return unpack("%32C*",$unique);
6750: }
6751:
6752: sub recprefix {
6753: my $fucourseid=shift;
6754: my $prefix;
6755: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6756: $prefix=$env{"course.$fucourseid.internal.encpref"};
6757: } else {
6758: $prefix=$perlvar{'lonHostID'};
6759: }
6760: return unpack("%32C*",$prefix);
6761: }
6762:
6763: sub ireceipt {
6764: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
6765: my $cuname=unpack("%32C*",$funame);
6766: my $cudom=unpack("%32C*",$fudom);
6767: my $cucourseid=unpack("%32C*",$fucourseid);
6768: my $cusymb=unpack("%32C*",$fusymb);
6769: my $cunique=&recunique($fucourseid);
6770: my $cpart=unpack("%32S*",$part);
6771: my $return =&recprefix($fucourseid).'-';
6772: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
6773: $env{'request.state'} eq 'construct') {
6774: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
6775: " and ".($cpart%$cudom));
6776:
6777: $return.= ($cunique%$cuname+
6778: $cunique%$cudom+
6779: $cusymb%$cuname+
6780: $cusymb%$cudom+
6781: $cucourseid%$cuname+
6782: $cucourseid%$cudom+
6783: $cpart%$cuname+
6784: $cpart%$cudom);
6785: } else {
6786: $return.= ($cunique%$cuname+
6787: $cunique%$cudom+
6788: $cusymb%$cuname+
6789: $cusymb%$cudom+
6790: $cucourseid%$cuname+
6791: $cucourseid%$cudom);
6792: }
6793: return $return;
6794: }
6795:
6796: sub receipt {
6797: my ($part)=@_;
6798: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
6799: return &ireceipt($name,$domain,$courseid,$symb,$part);
6800: }
6801:
6802: # ------------------------------------------------------------ Serves up a file
6803: # returns either the contents of the file or
6804: # -1 if the file doesn't exist
6805: #
6806: # if the target is a file that was uploaded via DOCS,
6807: # a check will be made to see if a current copy exists on the local server,
6808: # if it does this will be served, otherwise a copy will be retrieved from
6809: # the home server for the course and stored in /home/httpd/html/userfiles on
6810: # the local server.
6811:
6812: sub getfile {
6813: my ($file) = @_;
6814: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6815: &repcopy($file);
6816: return &readfile($file);
6817: }
6818:
6819: sub repcopy_userfile {
6820: my ($file)=@_;
6821: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6822: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
6823: my ($cdom,$cnum,$filename) =
6824: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
6825: my ($info,$rtncode);
6826: my $uri="/uploaded/$cdom/$cnum/$filename";
6827: if (-e "$file") {
6828: my @fileinfo = stat($file);
6829: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
6830: if ($lwpresp ne 'ok') {
6831: if ($rtncode eq '404') {
6832: unlink($file);
6833: }
6834: #my $ua=new LWP::UserAgent;
6835: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6836: #my $response=$ua->request($request);
6837: #if ($response->is_success()) {
6838: # return $response->content;
6839: # } else {
6840: # return -1;
6841: # }
6842: return -1;
6843: }
6844: if ($info < $fileinfo[9]) {
6845: return 'ok';
6846: }
6847: $info = '';
6848: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6849: if ($lwpresp ne 'ok') {
6850: return -1;
6851: }
6852: } else {
6853: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6854: if ($lwpresp ne 'ok') {
6855: my $ua=new LWP::UserAgent;
6856: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6857: my $response=$ua->request($request);
6858: if ($response->is_success()) {
6859: $info=$response->content;
6860: } else {
6861: return -1;
6862: }
6863: }
6864: my @parts = ($cdom,$cnum);
6865: if ($filename =~ m|^(.+)/[^/]+$|) {
6866: push @parts, split(/\//,$1);
6867: }
6868: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
6869: foreach my $part (@parts) {
6870: $path .= '/'.$part;
6871: if (!-e $path) {
6872: mkdir($path,0770);
6873: }
6874: }
6875: }
6876: open(FILE,">$file");
6877: print FILE $info;
6878: close(FILE);
6879: return 'ok';
6880: }
6881:
6882: sub tokenwrapper {
6883: my $uri=shift;
6884: $uri=~s|^http\://([^/]+)||;
6885: $uri=~s|^/||;
6886: $env{'user.environment'}=~/\/([^\/]+)\.id/;
6887: my $token=$1;
6888: my (undef,$udom,$uname,$file)=split('/',$uri,4);
6889: if ($udom && $uname && $file) {
6890: $file=~s|(\?\.*)*$||;
6891: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
6892: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
6893: (($uri=~/\?/)?'&':'?').'token='.$token.
6894: '&tokenissued='.$perlvar{'lonHostID'};
6895: } else {
6896: return '/adm/notfound.html';
6897: }
6898: }
6899:
6900: sub getuploaded {
6901: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
6902: $uri=~s/^\///;
6903: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
6904: my $ua=new LWP::UserAgent;
6905: my $request=new HTTP::Request($reqtype,$uri);
6906: my $response=$ua->request($request);
6907: $$rtncode = $response->code;
6908: if (! $response->is_success()) {
6909: return 'failed';
6910: }
6911: if ($reqtype eq 'HEAD') {
6912: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
6913: } elsif ($reqtype eq 'GET') {
6914: $$info = $response->content;
6915: }
6916: return 'ok';
6917: }
6918:
6919: sub readfile {
6920: my $file = shift;
6921: if ( (! -e $file ) || ($file eq '') ) { return -1; };
6922: my $fh;
6923: open($fh,"<$file");
6924: my $a='';
6925: while (<$fh>) { $a .=$_; }
6926: return $a;
6927: }
6928:
6929: sub filelocation {
6930: my ($dir,$file) = @_;
6931: my $location;
6932: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
6933:
6934: if ($file =~ m-^/adm/-) {
6935: $file=~s-^/adm/wrapper/-/-;
6936: $file=~s-^/adm/coursedocs/showdoc/-/-;
6937: }
6938: if ($file=~m:^/~:) { # is a contruction space reference
6939: $location = $file;
6940: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
6941: } elsif ($file=~m:^/home/[^/]*/public_html/:) {
6942: # is a correct contruction space reference
6943: $location = $file;
6944: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
6945: my ($udom,$uname,$filename)=
6946: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
6947: my $home=&homeserver($uname,$udom);
6948: my $is_me=0;
6949: my @ids=¤t_machine_ids();
6950: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
6951: if ($is_me) {
6952: $location=&propath($udom,$uname).
6953: '/userfiles/'.$filename;
6954: } else {
6955: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
6956: $udom.'/'.$uname.'/'.$filename;
6957: }
6958: } else {
6959: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6960: $file=~s:^/res/:/:;
6961: if ( !( $file =~ m:^/:) ) {
6962: $location = $dir. '/'.$file;
6963: } else {
6964: $location = '/home/httpd/html/res'.$file;
6965: }
6966: }
6967: $location=~s://+:/:g; # remove duplicate /
6968: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
6969: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
6970: return $location;
6971: }
6972:
6973: sub hreflocation {
6974: my ($dir,$file)=@_;
6975: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
6976: $file=filelocation($dir,$file);
6977: } elsif ($file=~m-^/adm/-) {
6978: $file=~s-^/adm/wrapper/-/-;
6979: $file=~s-^/adm/coursedocs/showdoc/-/-;
6980: }
6981: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
6982: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
6983: } elsif ($file=~m-/home/(\w+)/public_html/-) {
6984: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
6985: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
6986: $file=~s-^/home/httpd/lonUsers/([^/]*)/./././([^/]*)/userfiles/
6987: -/uploaded/$1/$2/-x;
6988: }
6989: return $file;
6990: }
6991:
6992: sub current_machine_domains {
6993: my $hostname=$hostname{$perlvar{'lonHostID'}};
6994: my @domains;
6995: while( my($id, $name) = each(%hostname)) {
6996: # &logthis("-$id-$name-$hostname-");
6997: if ($hostname eq $name) {
6998: push(@domains,$hostdom{$id});
6999: }
7000: }
7001: return @domains;
7002: }
7003:
7004: sub current_machine_ids {
7005: my $hostname=$hostname{$perlvar{'lonHostID'}};
7006: my @ids;
7007: while( my($id, $name) = each(%hostname)) {
7008: # &logthis("-$id-$name-$hostname-");
7009: if ($hostname eq $name) {
7010: push(@ids,$id);
7011: }
7012: }
7013: return @ids;
7014: }
7015:
7016: # ------------------------------------------------------------- Declutters URLs
7017:
7018: sub declutter {
7019: my $thisfn=shift;
7020: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7021: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7022: $thisfn=~s/^\///;
7023: $thisfn=~s|^adm/wrapper/||;
7024: $thisfn=~s|^adm/coursedocs/showdoc/||;
7025: $thisfn=~s/^res\///;
7026: $thisfn=~s/\?.+$//;
7027: return $thisfn;
7028: }
7029:
7030: # ------------------------------------------------------------- Clutter up URLs
7031:
7032: sub clutter {
7033: my $thisfn='/'.&declutter(shift);
7034: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
7035: $thisfn='/res'.$thisfn;
7036: }
7037: if ($thisfn !~m|/adm|) {
7038: if ($thisfn =~ m|/ext/|) {
7039: $thisfn='/adm/wrapper'.$thisfn;
7040: } else {
7041: my ($ext) = ($thisfn =~ /\.(\w+)$/);
7042: my $embstyle=&Apache::loncommon::fileembstyle($ext);
7043: if ($embstyle eq 'ssi'
7044: || ($embstyle eq 'hdn')
7045: || ($embstyle eq 'rat')
7046: || ($embstyle eq 'prv')
7047: || ($embstyle eq 'ign')) {
7048: #do nothing with these
7049: } elsif (($embstyle eq 'img')
7050: || ($embstyle eq 'emb')
7051: || ($embstyle eq 'wrp')) {
7052: $thisfn='/adm/wrapper'.$thisfn;
7053: } elsif ($embstyle eq 'unk'
7054: && $thisfn!~/\.(sequence|page)$/) {
7055: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
7056: } else {
7057: # &logthis("Got a blank emb style");
7058: }
7059: }
7060: }
7061: return $thisfn;
7062: }
7063:
7064: sub freeze_escape {
7065: my ($value)=@_;
7066: if (ref($value)) {
7067: $value=&nfreeze($value);
7068: return '__FROZEN__'.&escape($value);
7069: }
7070: return &escape($value);
7071: }
7072:
7073:
7074: sub thaw_unescape {
7075: my ($value)=@_;
7076: if ($value =~ /^__FROZEN__/) {
7077: substr($value,0,10,undef);
7078: $value=&unescape($value);
7079: return &thaw($value);
7080: }
7081: return &unescape($value);
7082: }
7083:
7084: sub correct_line_ends {
7085: my ($result)=@_;
7086: $$result =~s/\r\n/\n/mg;
7087: $$result =~s/\r/\n/mg;
7088: }
7089: # ================================================================ Main Program
7090:
7091: sub goodbye {
7092: &logthis("Starting Shut down");
7093: #not converted to using infrastruture and probably shouldn't be
7094: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
7095: #converted
7096: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
7097: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
7098: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
7099: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
7100: #1.1 only
7101: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
7102: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
7103: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
7104: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
7105: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
7106: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
7107: &logthis(sprintf("%-20s is %s",'hits',$hits));
7108: &flushcourselogs();
7109: &logthis("Shutting down");
7110: }
7111:
7112: BEGIN {
7113: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
7114: unless ($readit) {
7115: {
7116: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
7117: open(my $config,"</etc/httpd/conf/loncapa.conf");
7118:
7119: while (my $configline=<$config>) {
7120: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
7121: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
7122: chomp($varvalue);
7123: $perlvar{$varname}=$varvalue;
7124: }
7125: }
7126: close($config);
7127: }
7128: {
7129: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
7130:
7131: while (my $configline=<$config>) {
7132: if ($configline =~ /^[^\#]*PerlSetVar/) {
7133: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
7134: chomp($varvalue);
7135: $perlvar{$varname}=$varvalue;
7136: }
7137: }
7138: close($config);
7139: }
7140:
7141: # ------------------------------------------------------------ Read domain file
7142: {
7143: %domaindescription = ();
7144: %domain_auth_def = ();
7145: %domain_auth_arg_def = ();
7146: my $fh;
7147: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
7148: while (<$fh>) {
7149: next if (/^(\#|\s*$)/);
7150: # next if /^\#/;
7151: chomp;
7152: my ($domain, $domain_description, $def_auth, $def_auth_arg,
7153: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$_);
7154: $domain_auth_def{$domain}=$def_auth;
7155: $domain_auth_arg_def{$domain}=$def_auth_arg;
7156: $domaindescription{$domain}=$domain_description;
7157: $domain_lang_def{$domain}=$def_lang;
7158: $domain_city{$domain}=$city;
7159: $domain_longi{$domain}=$longi;
7160: $domain_lati{$domain}=$lati;
7161: $domain_primary{$domain}=$primary;
7162:
7163: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
7164: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
7165: }
7166: }
7167: close ($fh);
7168: }
7169:
7170:
7171: # ------------------------------------------------------------- Read hosts file
7172: {
7173: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
7174:
7175: while (my $configline=<$config>) {
7176: next if ($configline =~ /^(\#|\s*$)/);
7177: chomp($configline);
7178: my ($id,$domain,$role,$name)=split(/:/,$configline);
7179: $name=~s/\s//g;
7180: if ($id && $domain && $role && $name) {
7181: $hostname{$id}=$name;
7182: $hostdom{$id}=$domain;
7183: if ($role eq 'library') { $libserv{$id}=$name; }
7184: }
7185: }
7186: close($config);
7187: # FIXME: dev server don't want this, production servers _do_ want this
7188: #&get_iphost();
7189: }
7190:
7191: sub get_iphost {
7192: if (%iphost) { return %iphost; }
7193: my %name_to_ip;
7194: foreach my $id (keys(%hostname)) {
7195: my $name=$hostname{$id};
7196: my $ip;
7197: if (!exists($name_to_ip{$name})) {
7198: $ip = gethostbyname($name);
7199: if (!$ip || length($ip) ne 4) {
7200: &logthis("Skipping host $id name $name no IP found\n");
7201: next;
7202: }
7203: $ip=inet_ntoa($ip);
7204: $name_to_ip{$name} = $ip;
7205: } else {
7206: $ip = $name_to_ip{$name};
7207: }
7208: push(@{$iphost{$ip}},$id);
7209: }
7210: return %iphost;
7211: }
7212:
7213: # ------------------------------------------------------ Read spare server file
7214: {
7215: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
7216:
7217: while (my $configline=<$config>) {
7218: chomp($configline);
7219: if ($configline) {
7220: $spareid{$configline}=1;
7221: }
7222: }
7223: close($config);
7224: }
7225: # ------------------------------------------------------------ Read permissions
7226: {
7227: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
7228:
7229: while (my $configline=<$config>) {
7230: chomp($configline);
7231: if ($configline) {
7232: my ($role,$perm)=split(/ /,$configline);
7233: if ($perm ne '') { $pr{$role}=$perm; }
7234: }
7235: }
7236: close($config);
7237: }
7238:
7239: # -------------------------------------------- Read plain texts for permissions
7240: {
7241: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
7242:
7243: while (my $configline=<$config>) {
7244: chomp($configline);
7245: if ($configline) {
7246: my ($short,@plain)=split(/:/,$configline);
7247: %{$prp{$short}} = ();
7248: if (@plain > 0) {
7249: $prp{$short}{'std'} = $plain[0];
7250: for (my $i=1; $i<@plain; $i++) {
7251: $prp{$short}{'alt'.$i} = $plain[$i];
7252: }
7253: }
7254: }
7255: }
7256: close($config);
7257: }
7258:
7259: # ---------------------------------------------------------- Read package table
7260: {
7261: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
7262:
7263: while (my $configline=<$config>) {
7264: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
7265: chomp($configline);
7266: my ($short,$plain)=split(/:/,$configline);
7267: my ($pack,$name)=split(/\&/,$short);
7268: if ($plain ne '') {
7269: $packagetab{$pack.'&'.$name.'&name'}=$name;
7270: $packagetab{$short}=$plain;
7271: }
7272: }
7273: close($config);
7274: }
7275:
7276: # ------------- set up temporary directory
7277: {
7278: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
7279:
7280: }
7281:
7282: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
7283:
7284: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
7285: $dumpcount=0;
7286:
7287: &logtouch();
7288: &logthis('<font color="yellow">INFO: Read configuration</font>');
7289: $readit=1;
7290: {
7291: use integer;
7292: my $test=(2**32)+1;
7293: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
7294: &logthis(" Detected 64bit platform ($_64bit)");
7295: }
7296: }
7297: }
7298:
7299: 1;
7300: __END__
7301:
7302: =pod
7303:
7304: =head1 NAME
7305:
7306: Apache::lonnet - Subroutines to ask questions about things in the network.
7307:
7308: =head1 SYNOPSIS
7309:
7310: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
7311:
7312: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
7313:
7314: Common parameters:
7315:
7316: =over 4
7317:
7318: =item *
7319:
7320: $uname : an internal username (if $cname expecting a course Id specifically)
7321:
7322: =item *
7323:
7324: $udom : a domain (if $cdom expecting a course's domain specifically)
7325:
7326: =item *
7327:
7328: $symb : a resource instance identifier
7329:
7330: =item *
7331:
7332: $namespace : the name of a .db file that contains the data needed or
7333: being set.
7334:
7335: =back
7336:
7337: =head1 OVERVIEW
7338:
7339: lonnet provides subroutines which interact with the
7340: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
7341: about classes, users, and resources.
7342:
7343: For many of these objects you can also use this to store data about
7344: them or modify them in various ways.
7345:
7346: =head2 Symbs
7347:
7348: To identify a specific instance of a resource, LON-CAPA uses symbols
7349: or "symbs"X<symb>. These identifiers are built from the URL of the
7350: map, the resource number of the resource in the map, and the URL of
7351: the resource itself. The latter is somewhat redundant, but might help
7352: if maps change.
7353:
7354: An example is
7355:
7356: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
7357:
7358: The respective map entry is
7359:
7360: <resource id="19" src="/res/msu/korte/tests/part12.problem"
7361: title="Problem 2">
7362: </resource>
7363:
7364: Symbs are used by the random number generator, as well as to store and
7365: restore data specific to a certain instance of for example a problem.
7366:
7367: =head2 Storing And Retrieving Data
7368:
7369: X<store()>X<cstore()>X<restore()>Three of the most important functions
7370: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
7371: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
7372: is is the non-critical message twin of cstore. These functions are for
7373: handlers to store a perl hash to a user's permanent data space in an
7374: easy manner, and to retrieve it again on another call. It is expected
7375: that a handler would use this once at the beginning to retrieve data,
7376: and then again once at the end to send only the new data back.
7377:
7378: The data is stored in the user's data directory on the user's
7379: homeserver under the ID of the course.
7380:
7381: The hash that is returned by restore will have all of the previous
7382: value for all of the elements of the hash.
7383:
7384: Example:
7385:
7386: #creating a hash
7387: my %hash;
7388: $hash{'foo'}='bar';
7389:
7390: #storing it
7391: &Apache::lonnet::cstore(\%hash);
7392:
7393: #changing a value
7394: $hash{'foo'}='notbar';
7395:
7396: #adding a new value
7397: $hash{'bar'}='foo';
7398: &Apache::lonnet::cstore(\%hash);
7399:
7400: #retrieving the hash
7401: my %history=&Apache::lonnet::restore();
7402:
7403: #print the hash
7404: foreach my $key (sort(keys(%history))) {
7405: print("\%history{$key} = $history{$key}");
7406: }
7407:
7408: Will print out:
7409:
7410: %history{1:foo} = bar
7411: %history{1:keys} = foo:timestamp
7412: %history{1:timestamp} = 990455579
7413: %history{2:bar} = foo
7414: %history{2:foo} = notbar
7415: %history{2:keys} = foo:bar:timestamp
7416: %history{2:timestamp} = 990455580
7417: %history{bar} = foo
7418: %history{foo} = notbar
7419: %history{timestamp} = 990455580
7420: %history{version} = 2
7421:
7422: Note that the special hash entries C<keys>, C<version> and
7423: C<timestamp> were added to the hash. C<version> will be equal to the
7424: total number of versions of the data that have been stored. The
7425: C<timestamp> attribute will be the UNIX time the hash was
7426: stored. C<keys> is available in every historical section to list which
7427: keys were added or changed at a specific historical revision of a
7428: hash.
7429:
7430: B<Warning>: do not store the hash that restore returns directly. This
7431: will cause a mess since it will restore the historical keys as if the
7432: were new keys. I.E. 1:foo will become 1:1:foo etc.
7433:
7434: Calling convention:
7435:
7436: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
7437: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
7438:
7439: For more detailed information, see lonnet specific documentation.
7440:
7441: =head1 RETURN MESSAGES
7442:
7443: =over 4
7444:
7445: =item * B<con_lost>: unable to contact remote host
7446:
7447: =item * B<con_delayed>: unable to contact remote host, message will be delivered
7448: when the connection is brought back up
7449:
7450: =item * B<con_failed>: unable to contact remote host and unable to save message
7451: for later delivery
7452:
7453: =item * B<error:>: an error a occured, a description of the error follows the :
7454:
7455: =item * B<no_such_host>: unable to fund a host associated with the user/domain
7456: that was requested
7457:
7458: =back
7459:
7460: =head1 PUBLIC SUBROUTINES
7461:
7462: =head2 Session Environment Functions
7463:
7464: =over 4
7465:
7466: =item *
7467: X<appenv()>
7468: B<appenv(%hash)>: the value of %hash is written to
7469: the user envirnoment file, and will be restored for each access this
7470: user makes during this session, also modifies the %env for the current
7471: process
7472:
7473: =item *
7474: X<delenv()>
7475: B<delenv($regexp)>: removes all items from the session
7476: environment file that matches the regular expression in $regexp. The
7477: values are also delted from the current processes %env.
7478:
7479: =back
7480:
7481: =head2 User Information
7482:
7483: =over 4
7484:
7485: =item *
7486: X<queryauthenticate()>
7487: B<queryauthenticate($uname,$udom)>: try to determine user's current
7488: authentication scheme
7489:
7490: =item *
7491: X<authenticate()>
7492: B<authenticate($uname,$upass,$udom)>: try to
7493: authenticate user from domain's lib servers (first use the current
7494: one). C<$upass> should be the users password.
7495:
7496: =item *
7497: X<homeserver()>
7498: B<homeserver($uname,$udom)>: find the server which has
7499: the user's directory and files (there must be only one), this caches
7500: the answer, and also caches if there is a borken connection.
7501:
7502: =item *
7503: X<idget()>
7504: B<idget($udom,@ids)>: find the usernames behind a list of IDs
7505: (IDs are a unique resource in a domain, there must be only 1 ID per
7506: username, and only 1 username per ID in a specific domain) (returns
7507: hash: id=>name,id=>name)
7508:
7509: =item *
7510: X<idrget()>
7511: B<idrget($udom,@unames)>: find the IDs behind a list of
7512: usernames (returns hash: name=>id,name=>id)
7513:
7514: =item *
7515: X<idput()>
7516: B<idput($udom,%ids)>: store away a list of names and associated IDs
7517:
7518: =item *
7519: X<rolesinit()>
7520: B<rolesinit($udom,$username,$authhost)>: get user privileges
7521:
7522: =item *
7523: X<getsection()>
7524: B<getsection($udom,$uname,$cname)>: finds the section of student in the
7525: course $cname, return section name/number or '' for "not in course"
7526: and '-1' for "no section"
7527:
7528: =item *
7529: X<userenvironment()>
7530: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
7531: passed in @what from the requested user's environment, returns a hash
7532:
7533: =back
7534:
7535: =head2 User Roles
7536:
7537: =over 4
7538:
7539: =item *
7540:
7541: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
7542: actions
7543: F: full access
7544: U,I,K: authentication modes (cxx only)
7545: '': forbidden
7546: 1: user needs to choose course
7547: 2: browse allowed
7548: A: passphrase authentication needed
7549:
7550: =item *
7551:
7552: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
7553: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
7554: and course level
7555:
7556: =item *
7557:
7558: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
7559: explanation of a user role term
7560:
7561: =back
7562:
7563: =head2 User Modification
7564:
7565: =over 4
7566:
7567: =item *
7568:
7569: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
7570: user for the level given by URL. Optional start and end dates (leave empty
7571: string or zero for "no date")
7572:
7573: =item *
7574:
7575: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
7576: change a users, password, possible return values are: ok,
7577: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
7578: refused
7579:
7580: =item *
7581:
7582: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
7583:
7584: =item *
7585:
7586: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
7587: modify user
7588:
7589: =item *
7590:
7591: modifystudent
7592:
7593: modify a students enrollment and identification information.
7594: The course id is resolved based on the current users environment.
7595: This means the envoking user must be a course coordinator or otherwise
7596: associated with a course.
7597:
7598: This call is essentially a wrapper for lonnet::modifyuser and
7599: lonnet::modify_student_enrollment
7600:
7601: Inputs:
7602:
7603: =over 4
7604:
7605: =item B<$udom> Students loncapa domain
7606:
7607: =item B<$uname> Students loncapa login name
7608:
7609: =item B<$uid> Students id/student number
7610:
7611: =item B<$umode> Students authentication mode
7612:
7613: =item B<$upass> Students password
7614:
7615: =item B<$first> Students first name
7616:
7617: =item B<$middle> Students middle name
7618:
7619: =item B<$last> Students last name
7620:
7621: =item B<$gene> Students generation
7622:
7623: =item B<$usec> Students section in course
7624:
7625: =item B<$end> Unix time of the roles expiration
7626:
7627: =item B<$start> Unix time of the roles start date
7628:
7629: =item B<$forceid> If defined, allow $uid to be changed
7630:
7631: =item B<$desiredhome> server to use as home server for student
7632:
7633: =back
7634:
7635: =item *
7636:
7637: modify_student_enrollment
7638:
7639: Change a students enrollment status in a class. The environment variable
7640: 'role.request.course' must be defined for this function to proceed.
7641:
7642: Inputs:
7643:
7644: =over 4
7645:
7646: =item $udom, students domain
7647:
7648: =item $uname, students name
7649:
7650: =item $uid, students user id
7651:
7652: =item $first, students first name
7653:
7654: =item $middle
7655:
7656: =item $last
7657:
7658: =item $gene
7659:
7660: =item $usec
7661:
7662: =item $end
7663:
7664: =item $start
7665:
7666: =back
7667:
7668:
7669: =item *
7670:
7671: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
7672: custom role; give a custom role to a user for the level given by URL. Specify
7673: name and domain of role author, and role name
7674:
7675: =item *
7676:
7677: revokerole($udom,$uname,$url,$role) : revoke a role for url
7678:
7679: =item *
7680:
7681: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
7682:
7683: =back
7684:
7685: =head2 Course Infomation
7686:
7687: =over 4
7688:
7689: =item *
7690:
7691: coursedescription($courseid) : returns a hash of information about the
7692: specified course id, including all environment settings for the
7693: course, the description of the course will be in the hash under the
7694: key 'description'
7695:
7696: =item *
7697:
7698: resdata($name,$domain,$type,@which) : request for current parameter
7699: setting for a specific $type, where $type is either 'course' or 'user',
7700: @what should be a list of parameters to ask about. This routine caches
7701: answers for 5 minutes.
7702:
7703: =back
7704:
7705: =head2 Course Modification
7706:
7707: =over 4
7708:
7709: =item *
7710:
7711: writecoursepref($courseid,%prefs) : write preferences (environment
7712: database) for a course
7713:
7714: =item *
7715:
7716: createcourse($udom,$description,$url) : make/modify course
7717:
7718: =back
7719:
7720: =head2 Resource Subroutines
7721:
7722: =over 4
7723:
7724: =item *
7725:
7726: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
7727:
7728: =item *
7729:
7730: repcopy($filename) : subscribes to the requested file, and attempts to
7731: replicate from the owning library server, Might return
7732: 'unavailable', 'not_found', 'forbidden', 'ok', or
7733: 'bad_request', also attempts to grab the metadata for the
7734: resource. Expects the local filesystem pathname
7735: (/home/httpd/html/res/....)
7736:
7737: =back
7738:
7739: =head2 Resource Information
7740:
7741: =over 4
7742:
7743: =item *
7744:
7745: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
7746: a vairety of different possible values, $varname should be a request
7747: string, and the other parameters can be used to specify who and what
7748: one is asking about.
7749:
7750: Possible values for $varname are environment.lastname (or other item
7751: from the envirnment hash), user.name (or someother aspect about the
7752: user), resource.0.maxtries (or some other part and parameter of a
7753: resource)
7754:
7755: =item *
7756:
7757: directcondval($number) : get current value of a condition; reads from a state
7758: string
7759:
7760: =item *
7761:
7762: condval($condidx) : value of condition index based on state
7763:
7764: =item *
7765:
7766: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
7767: resource's metadata, $what should be either a specific key, or either
7768: 'keys' (to get a list of possible keys) or 'packages' to get a list of
7769: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
7770:
7771: this function automatically caches all requests
7772:
7773: =item *
7774:
7775: metadata_query($query,$custom,$customshow) : make a metadata query against the
7776: network of library servers; returns file handle of where SQL and regex results
7777: will be stored for query
7778:
7779: =item *
7780:
7781: symbread($filename) : return symbolic list entry (filename argument optional);
7782: returns the data handle
7783:
7784: =item *
7785:
7786: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
7787: a possible symb for the URL in $thisfn, and if is an encryypted
7788: resource that the user accessed using /enc/ returns a 1 on success, 0
7789: on failure, user must be in a course, as it assumes the existance of
7790: the course initial hash, and uses $env('request.course.id'}
7791:
7792:
7793: =item *
7794:
7795: symbclean($symb) : removes versions numbers from a symb, returns the
7796: cleaned symb
7797:
7798: =item *
7799:
7800: is_on_map($uri) : checks if the $uri is somewhere on the current
7801: course map, user must be in a course for it to work.
7802:
7803: =item *
7804:
7805: numval($salt) : return random seed value (addend for rndseed)
7806:
7807: =item *
7808:
7809: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
7810: a random seed, all arguments are optional, if they aren't sent it uses the
7811: environment to derive them. Note: if symb isn't sent and it can't get one
7812: from &symbread it will use the current time as its return value
7813:
7814: =item *
7815:
7816: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
7817: unfakeable, receipt
7818:
7819: =item *
7820:
7821: receipt() : API to ireceipt working off of env values; given out to users
7822:
7823: =item *
7824:
7825: countacc($url) : count the number of accesses to a given URL
7826:
7827: =item *
7828:
7829: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
7830:
7831: =item *
7832:
7833: checkin($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 $tcrsid)
7834:
7835: =item *
7836:
7837: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
7838:
7839: =item *
7840:
7841: devalidate($symb) : devalidate temporary spreadsheet calculations,
7842: forcing spreadsheet to reevaluate the resource scores next time.
7843:
7844: =back
7845:
7846: =head2 Storing/Retreiving Data
7847:
7848: =over 4
7849:
7850: =item *
7851:
7852: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
7853: for this url; hashref needs to be given and should be a \%hashname; the
7854: remaining args aren't required and if they aren't passed or are '' they will
7855: be derived from the env
7856:
7857: =item *
7858:
7859: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
7860: uses critical subroutine
7861:
7862: =item *
7863:
7864: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
7865: all args are optional
7866:
7867: =item *
7868:
7869: dumpstore($namespace,$udom,$uname,$regexp,$range) :
7870: dumps the complete (or key matching regexp) namespace into a hash
7871: ($udom, $uname, $regexp, $range are optional) for a namespace that is
7872: normally &store()ed into
7873:
7874: $range should be either an integer '100' (give me the first 100
7875: matching records)
7876: or be two integers sperated by a - with no spaces
7877: '30-50' (give me the 30th through the 50th matching
7878: records)
7879:
7880:
7881: =item *
7882:
7883: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
7884: replaces a &store() version of data with a replacement set of data
7885: for a particular resource in a namespace passed in the $storehash hash
7886: reference
7887:
7888: =item *
7889:
7890: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
7891: works very similar to store/cstore, but all data is stored in a
7892: temporary location and can be reset using tmpreset, $storehash should
7893: be a hash reference, returns nothing on success
7894:
7895: =item *
7896:
7897: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
7898: similar to restore, but all data is stored in a temporary location and
7899: can be reset using tmpreset. Returns a hash of values on success,
7900: error string otherwise.
7901:
7902: =item *
7903:
7904: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
7905: deltes all keys for $symb form the temporary storage hash.
7906:
7907: =item *
7908:
7909: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7910: reference filled in from namesp ($udom and $uname are optional)
7911:
7912: =item *
7913:
7914: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
7915: namesp ($udom and $uname are optional)
7916:
7917: =item *
7918:
7919: dump($namespace,$udom,$uname,$regexp,$range) :
7920: dumps the complete (or key matching regexp) namespace into a hash
7921: ($udom, $uname, $regexp, $range are optional)
7922:
7923: $range should be either an integer '100' (give me the first 100
7924: matching records)
7925: or be two integers sperated by a - with no spaces
7926: '30-50' (give me the 30th through the 50th matching
7927: records)
7928: =item *
7929:
7930: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
7931: $store can be a scalar, an array reference, or if the amount to be
7932: incremented is > 1, a hash reference.
7933:
7934: ($udom and $uname are optional)
7935:
7936: =item *
7937:
7938: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
7939: ($udom and $uname are optional)
7940:
7941: =item *
7942:
7943: cput($namespace,$storehash,$udom,$uname) : critical put
7944: ($udom and $uname are optional)
7945:
7946: =item *
7947:
7948: newput($namespace,$storehash,$udom,$uname) :
7949:
7950: Attempts to store the items in the $storehash, but only if they don't
7951: currently exist, if this succeeds you can be certain that you have
7952: successfully created a new key value pair in the $namespace db.
7953:
7954:
7955: Args:
7956: $namespace: name of database to store values to
7957: $storehash: hashref to store to the db
7958: $udom: (optional) domain of user containing the db
7959: $uname: (optional) name of user caontaining the db
7960:
7961: Returns:
7962: 'ok' -> succeeded in storing all keys of $storehash
7963: 'key_exists: <key>' -> failed to anything out of $storehash, as at
7964: least <key> already existed in the db (other
7965: requested keys may also already exist)
7966: 'error: <msg>' -> unable to tie the DB or other erorr occured
7967: 'con_lost' -> unable to contact request server
7968: 'refused' -> action was not allowed by remote machine
7969:
7970:
7971: =item *
7972:
7973: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7974: reference filled in from namesp (encrypts the return communication)
7975: ($udom and $uname are optional)
7976:
7977: =item *
7978:
7979: log($udom,$name,$home,$message) : write to permanent log for user; use
7980: critical subroutine
7981:
7982: =back
7983:
7984: =head2 Network Status Functions
7985:
7986: =over 4
7987:
7988: =item *
7989:
7990: dirlist($uri) : return directory list based on URI
7991:
7992: =item *
7993:
7994: spareserver() : find server with least workload from spare.tab
7995:
7996: =back
7997:
7998: =head2 Apache Request
7999:
8000: =over 4
8001:
8002: =item *
8003:
8004: ssi($url,%hash) : server side include, does a complete request cycle on url to
8005: localhost, posts hash
8006:
8007: =back
8008:
8009: =head2 Data to String to Data
8010:
8011: =over 4
8012:
8013: =item *
8014:
8015: hash2str(%hash) : convert a hash into a string complete with escaping and '='
8016: and '&' separators, supports elements that are arrayrefs and hashrefs
8017:
8018: =item *
8019:
8020: hashref2str($hashref) : convert a hashref into a string complete with
8021: escaping and '=' and '&' separators, supports elements that are
8022: arrayrefs and hashrefs
8023:
8024: =item *
8025:
8026: arrayref2str($arrayref) : convert an arrayref into a string complete
8027: with escaping and '&' separators, supports elements that are arrayrefs
8028: and hashrefs
8029:
8030: =item *
8031:
8032: str2hash($string) : convert string to hash using unescaping and
8033: splitting on '=' and '&', supports elements that are arrayrefs and
8034: hashrefs
8035:
8036: =item *
8037:
8038: str2array($string) : convert string to hash using unescaping and
8039: splitting on '&', supports elements that are arrayrefs and hashrefs
8040:
8041: =back
8042:
8043: =head2 Logging Routines
8044:
8045: =over 4
8046:
8047: These routines allow one to make log messages in the lonnet.log and
8048: lonnet.perm logfiles.
8049:
8050: =item *
8051:
8052: logtouch() : make sure the logfile, lonnet.log, exists
8053:
8054: =item *
8055:
8056: logthis() : append message to the normal lonnet.log file, it gets
8057: preiodically rolled over and deleted.
8058:
8059: =item *
8060:
8061: logperm() : append a permanent message to lonnet.perm.log, this log
8062: file never gets deleted by any automated portion of the system, only
8063: messages of critical importance should go in here.
8064:
8065: =back
8066:
8067: =head2 General File Helper Routines
8068:
8069: =over 4
8070:
8071: =item *
8072:
8073: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
8074: (a) files in /uploaded
8075: (i) If a local copy of the file exists -
8076: compares modification date of local copy with last-modified date for
8077: definitive version stored on home server for course. If local copy is
8078: stale, requests a new version from the home server and stores it.
8079: If the original has been removed from the home server, then local copy
8080: is unlinked.
8081: (ii) If local copy does not exist -
8082: requests the file from the home server and stores it.
8083:
8084: If $caller is 'uploadrep':
8085: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
8086: for request for files originally uploaded via DOCS.
8087: - returns 'ok' if fresh local copy now available, -1 otherwise.
8088:
8089: Otherwise:
8090: This indicates a call from the content generation phase of the request.
8091: - returns the entire contents of the file or -1.
8092:
8093: (b) files in /res
8094: - returns the entire contents of a file or -1;
8095: it properly subscribes to and replicates the file if neccessary.
8096:
8097:
8098: =item *
8099:
8100: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
8101: reference
8102:
8103: returns either a stat() list of data about the file or an empty list
8104: if the file doesn't exist or couldn't find out about it (connection
8105: problems or user unknown)
8106:
8107: =item *
8108:
8109: filelocation($dir,$file) : returns file system location of a file
8110: based on URI; meant to be "fairly clean" absolute reference, $dir is a
8111: directory that relative $file lookups are to looked in ($dir of /a/dir
8112: and a file of ../bob will become /a/bob)
8113:
8114: =item *
8115:
8116: hreflocation($dir,$file) : returns file system location or a URL; same as
8117: filelocation except for hrefs
8118:
8119: =item *
8120:
8121: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
8122:
8123: =back
8124:
8125: =head2 Usererfile file routines (/uploaded*)
8126:
8127: =over 4
8128:
8129: =item *
8130:
8131: userfileupload(): main rotine for putting a file in a user or course's
8132: filespace, arguments are,
8133:
8134: formname - required - this is the name of the element in $env where the
8135: filename, and the contents of the file to create/modifed exist
8136: the filename is in $env{'form.'.$formname.'.filename'} and the
8137: contents of the file is located in $env{'form.'.$formname}
8138: coursedoc - if true, store the file in the course of the active role
8139: of the current user
8140: subdir - required - subdirectory to put the file in under ../userfiles/
8141: if undefined, it will be placed in "unknown"
8142:
8143: (This routine calls clean_filename() to remove any dangerous
8144: characters from the filename, and then calls finuserfileupload() to
8145: complete the transaction)
8146:
8147: returns either the url of the uploaded file (/uploaded/....) if successful
8148: and /adm/notfound.html if unsuccessful
8149:
8150: =item *
8151:
8152: clean_filename(): routine for cleaing a filename up for storage in
8153: userfile space, argument is:
8154:
8155: filename - proposed filename
8156:
8157: returns: the new clean filename
8158:
8159: =item *
8160:
8161: finishuserfileupload(): routine that creaes and sends the file to
8162: userspace, probably shouldn't be called directly
8163:
8164: docuname: username or courseid of destination for the file
8165: docudom: domain of user/course of destination for the file
8166: formname: same as for userfileupload()
8167: fname: filename (inculding subdirectories) for the file
8168:
8169: returns either the url of the uploaded file (/uploaded/....) if successful
8170: and /adm/notfound.html if unsuccessful
8171:
8172: =item *
8173:
8174: renameuserfile(): renames an existing userfile to a new name
8175:
8176: Args:
8177: docuname: username or courseid of destination for the file
8178: docudom: domain of user/course of destination for the file
8179: old: current file name (including any subdirs under userfiles)
8180: new: desired file name (including any subdirs under userfiles)
8181:
8182: =item *
8183:
8184: mkdiruserfile(): creates a directory is a userfiles dir
8185:
8186: Args:
8187: docuname: username or courseid of destination for the file
8188: docudom: domain of user/course of destination for the file
8189: dir: dir to create (including any subdirs under userfiles)
8190:
8191: =item *
8192:
8193: removeuserfile(): removes a file that exists in userfiles
8194:
8195: Args:
8196: docuname: username or courseid of destination for the file
8197: docudom: domain of user/course of destination for the file
8198: fname: filname to delete (including any subdirs under userfiles)
8199:
8200: =item *
8201:
8202: removeuploadedurl(): convience function for removeuserfile()
8203:
8204: Args:
8205: url: a full /uploaded/... url to delete
8206:
8207: =item *
8208:
8209: get_portfile_permissions():
8210: Args:
8211: domain: domain of user or course contain the portfolio files
8212: user: name of user or num of course contain the portfolio files
8213: Returns:
8214: hashref of a dump of the proper file_permissions.db
8215:
8216:
8217: =item *
8218:
8219: get_access_controls():
8220:
8221: Args:
8222: current_permissions: the hash ref returned from get_portfile_permissions()
8223: group: (optional) the group you want the files associated with
8224: file: (optional) the file you want access info on
8225:
8226: Returns:
8227: a hash (keys are file names) of hashes containing
8228: keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
8229: values are XML containing access control settings (see below)
8230:
8231: Internal notes:
8232:
8233: access controls are stored in file_permissions.db as key=value pairs.
8234: key -> path to file/file_name\0uniqueID:scope_end_start
8235: where scope -> public,guest,course,group,domains or users.
8236: end -> UNIX time for end of access (0 -> no end date)
8237: start -> UNIX time for start of access
8238:
8239: value -> XML description of access control
8240: <scope type=""> (type =1 of: public,guest,course,group,domains,users">
8241: <start></start>
8242: <end></end>
8243:
8244: <password></password> for scope type = guest
8245:
8246: <domain></domain> for scope type = course or group
8247: <number></number>
8248: <roles id="">
8249: <role></role>
8250: <access></access>
8251: <section></section>
8252: <group></group>
8253: </roles>
8254:
8255: <dom></dom> for scope type = domains
8256:
8257: <users> for scope type = users
8258: <user>
8259: <uname></uname>
8260: <udom></udom>
8261: </user>
8262: </users>
8263: </scope>
8264:
8265: Access data is also aggregated for each file in an additional key=value pair:
8266: key -> path to file/file_name\0accesscontrol
8267: value -> reference to hash
8268: hash contains key = value pairs
8269: where key = uniqueID:scope_end_start
8270: value = UNIX time record was last updated
8271:
8272: Used to improve speed of look-ups of access controls for each file.
8273:
8274: Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
8275:
8276: modify_access_controls():
8277:
8278: Modifies access controls for a portfolio file
8279: Args
8280: 1. file name
8281: 2. reference to hash of required changes,
8282: 3. domain
8283: 4. username
8284: where domain,username are the domain of the portfolio owner
8285: (either a user or a course)
8286:
8287: Returns:
8288: 1. result of additions or updates ('ok' or 'error', with error message).
8289: 2. result of deletions ('ok' or 'error', with error message).
8290: 3. reference to hash of any new or updated access controls.
8291: 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
8292: key = integer (inbound ID)
8293: value = uniqueID
8294:
8295: =back
8296:
8297: =head2 HTTP Helper Routines
8298:
8299: =over 4
8300:
8301: =item *
8302:
8303: escape() : unpack non-word characters into CGI-compatible hex codes
8304:
8305: =item *
8306:
8307: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
8308:
8309: =back
8310:
8311: =head1 PRIVATE SUBROUTINES
8312:
8313: =head2 Underlying communication routines (Shouldn't call)
8314:
8315: =over 4
8316:
8317: =item *
8318:
8319: subreply() : tries to pass a message to lonc, returns con_lost if incapable
8320:
8321: =item *
8322:
8323: reply() : uses subreply to send a message to remote machine, logs all failures
8324:
8325: =item *
8326:
8327: critical() : passes a critical message to another server; if cannot
8328: get through then place message in connection buffer directory and
8329: returns con_delayed, if incapable of saving message, returns
8330: con_failed
8331:
8332: =item *
8333:
8334: reconlonc() : tries to reconnect lonc client processes.
8335:
8336: =back
8337:
8338: =head2 Resource Access Logging
8339:
8340: =over 4
8341:
8342: =item *
8343:
8344: flushcourselogs() : flush (save) buffer logs and access logs
8345:
8346: =item *
8347:
8348: courselog($what) : save message for course in hash
8349:
8350: =item *
8351:
8352: courseacclog($what) : save message for course using &courselog(). Perform
8353: special processing for specific resource types (problems, exams, quizzes, etc).
8354:
8355: =item *
8356:
8357: goodbye() : flush course logs and log shutting down; it is called in srm.conf
8358: as a PerlChildExitHandler
8359:
8360: =back
8361:
8362: =head2 Other
8363:
8364: =over 4
8365:
8366: =item *
8367:
8368: symblist($mapname,%newhash) : update symbolic storage links
8369:
8370: =back
8371:
8372: =cut
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