1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.784 2006/09/28 01:38:59 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: sub convert_and_load_session_env {
296: my ($lonidsdir,$handle)=@_;
297: my @profile;
298: {
299: open(my $idf,"$lonidsdir/$handle.id");
300: flock($idf,LOCK_SH);
301: @profile=<$idf>;
302: close($idf);
303: }
304: my %temp_env;
305: foreach my $line (@profile) {
306: chomp($line);
307: my ($envname,$envvalue)=split(/=/,$line,2);
308: $temp_env{&unescape($envname)} = &unescape($envvalue);
309: }
310: unlink("$lonidsdir/$handle.id");
311: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",&GDBM_WRCREAT(),
312: 0640)) {
313: %disk_env = %temp_env;
314: @env{keys(%temp_env)} = @disk_env{keys(%temp_env)};
315: untie(%disk_env);
316: }
317: }
318:
319: # ------------------------------------------- Transfer profile into environment
320: my $env_loaded;
321: sub transfer_profile_to_env {
322: if ($env_loaded) { return; }
323:
324: my ($lonidsdir,$handle)=@_;
325: if (!defined($lonidsdir)) {
326: $lonidsdir = $perlvar{'lonIDsDir'};
327: }
328: if (!defined($handle)) {
329: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
330: }
331:
332: my %remove;
333: if (tie(my %disk_env,'GDBM_File',"$lonidsdir/$handle.id",&GDBM_READER(),
334: 0640)) {
335: @env{keys(%disk_env)} = @disk_env{keys(%disk_env)};
336: untie(%disk_env);
337: } else {
338: &convert_and_load_session_env($lonidsdir,$handle);
339: }
340:
341: while ( my $envname = each(%env) ) {
342: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
343: if ($time < time-300) {
344: $remove{$key}++;
345: }
346: }
347: }
348:
349: $env{'user.environment'} = "$lonidsdir/$handle.id";
350: $env_loaded=1;
351: foreach my $expired_key (keys(%remove)) {
352: &delenv($expired_key);
353: }
354: }
355:
356: # ---------------------------------------------------------- Append Environment
357:
358: sub appenv {
359: my %newenv=@_;
360: foreach my $key (keys(%newenv)) {
361: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
362: &logthis("<font color=\"blue\">WARNING: ".
363: "Attempt to modify environment ".$key." to ".$newenv{$key}
364: .'</font>');
365: delete($newenv{$key});
366: } else {
367: $env{$key}=$newenv{$key};
368: }
369: }
370: if (tie(my %disk_env,'GDBM_File',$env{'user.environment'},&GDBM_WRITER(),
371: 0640)) {
372: while (my ($key,$value) = each(%newenv)) {
373: $disk_env{$key} = $value;
374: }
375: untie(%disk_env);
376: }
377: return 'ok';
378: }
379: # ----------------------------------------------------- Delete from Environment
380:
381: sub delenv {
382: my $delthis=shift;
383: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
384: &logthis("<font color=\"blue\">WARNING: ".
385: "Attempt to delete from environment ".$delthis);
386: return 'error';
387: }
388: if (tie(my %disk_env,'GDBM_File',$env{'user.environment'},&GDBM_WRITER(),
389: 0640)) {
390: foreach my $key (keys(%disk_env)) {
391: if ($key=~/^$delthis/) {
392: delete($env{$key});
393: delete($disk_env{$key});
394: }
395: }
396: untie(%disk_env);
397: }
398: return 'ok';
399: }
400:
401: # ------------------------------------------ Find out current server userload
402: # there is a copy in lond
403: sub userload {
404: my $numusers=0;
405: {
406: opendir(LONIDS,$perlvar{'lonIDsDir'});
407: my $filename;
408: my $curtime=time;
409: while ($filename=readdir(LONIDS)) {
410: if ($filename eq '.' || $filename eq '..') {next;}
411: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
412: if ($curtime-$mtime < 1800) { $numusers++; }
413: }
414: closedir(LONIDS);
415: }
416: my $userloadpercent=0;
417: my $maxuserload=$perlvar{'lonUserLoadLim'};
418: if ($maxuserload) {
419: $userloadpercent=100*$numusers/$maxuserload;
420: }
421: $userloadpercent=sprintf("%.2f",$userloadpercent);
422: return $userloadpercent;
423: }
424:
425: # ------------------------------------------ Fight off request when overloaded
426:
427: sub overloaderror {
428: my ($r,$checkserver)=@_;
429: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
430: my $loadavg;
431: if ($checkserver eq $perlvar{'lonHostID'}) {
432: open(my $loadfile,'/proc/loadavg');
433: $loadavg=<$loadfile>;
434: $loadavg =~ s/\s.*//g;
435: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
436: close($loadfile);
437: } else {
438: $loadavg=&reply('load',$checkserver);
439: }
440: my $overload=$loadavg-100;
441: if ($overload>0) {
442: $r->err_headers_out->{'Retry-After'}=$overload;
443: $r->log_error('Overload of '.$overload.' on '.$checkserver);
444: return 413;
445: }
446: return '';
447: }
448:
449: # ------------------------------ Find server with least workload from spare.tab
450:
451: sub spareserver {
452: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
453: my $spare_server;
454: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
455: my $lowest_load=($loadpercent > $userloadpercent) ? $loadpercent
456: : $userloadpercent;
457:
458: foreach my $try_server (@{ $spareid{'primary'} }) {
459: ($spare_server, $lowest_load) =
460: &compare_server_load($try_server, $spare_server, $lowest_load);
461: }
462:
463: my $found_server = ($spare_server ne '' && $lowest_load < 100);
464:
465: if (!$found_server) {
466: foreach my $try_server (@{ $spareid{'default'} }) {
467: ($spare_server, $lowest_load) =
468: &compare_server_load($try_server, $spare_server, $lowest_load);
469: }
470: }
471:
472: if (!$want_server_name) {
473: $spare_server="http://$hostname{$spare_server}";
474: }
475: return $spare_server;
476: }
477:
478: sub compare_server_load {
479: my ($try_server, $spare_server, $lowest_load) = @_;
480:
481: my $loadans = &reply('load', $try_server);
482: my $userloadans = &reply('userload',$try_server);
483:
484: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
485: next; #didn't get a number from the server
486: }
487:
488: my $load;
489: if ($loadans =~ /\d/) {
490: if ($userloadans =~ /\d/) {
491: #both are numbers, pick the bigger one
492: $load = ($loadans > $userloadans) ? $loadans
493: : $userloadans;
494: } else {
495: $load = $loadans;
496: }
497: } else {
498: $load = $userloadans;
499: }
500:
501: if (($load =~ /\d/) && ($load < $lowest_load)) {
502: $spare_server = $try_server;
503: $lowest_load = $load;
504: }
505: return ($spare_server,$lowest_load);
506: }
507: # --------------------------------------------- Try to change a user's password
508:
509: sub changepass {
510: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
511: $currentpass = &escape($currentpass);
512: $newpass = &escape($newpass);
513: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
514: $server);
515: if (! $answer) {
516: &logthis("No reply on password change request to $server ".
517: "by $uname in domain $udom.");
518: } elsif ($answer =~ "^ok") {
519: &logthis("$uname in $udom successfully changed their password ".
520: "on $server.");
521: } elsif ($answer =~ "^pwchange_failure") {
522: &logthis("$uname in $udom was unable to change their password ".
523: "on $server. The action was blocked by either lcpasswd ".
524: "or pwchange");
525: } elsif ($answer =~ "^non_authorized") {
526: &logthis("$uname in $udom did not get their password correct when ".
527: "attempting to change it on $server.");
528: } elsif ($answer =~ "^auth_mode_error") {
529: &logthis("$uname in $udom attempted to change their password despite ".
530: "not being locally or internally authenticated on $server.");
531: } elsif ($answer =~ "^unknown_user") {
532: &logthis("$uname in $udom attempted to change their password ".
533: "on $server but were unable to because $server is not ".
534: "their home server.");
535: } elsif ($answer =~ "^refused") {
536: &logthis("$server refused to change $uname in $udom password because ".
537: "it was sent an unencrypted request to change the password.");
538: }
539: return $answer;
540: }
541:
542: # ----------------------- Try to determine user's current authentication scheme
543:
544: sub queryauthenticate {
545: my ($uname,$udom)=@_;
546: my $uhome=&homeserver($uname,$udom);
547: if (!$uhome) {
548: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
549: return 'no_host';
550: }
551: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
552: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
553: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
554: }
555: return $answer;
556: }
557:
558: # --------- Try to authenticate user from domain's lib servers (first this one)
559:
560: sub authenticate {
561: my ($uname,$upass,$udom)=@_;
562: $upass=escape($upass);
563: $uname=~s/\W//g;
564: my $uhome=&homeserver($uname,$udom);
565: if (!$uhome) {
566: &logthis("User $uname at $udom is unknown in authenticate");
567: return 'no_host';
568: }
569: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
570: if ($answer eq 'authorized') {
571: &logthis("User $uname at $udom authorized by $uhome");
572: return $uhome;
573: }
574: if ($answer eq 'non_authorized') {
575: &logthis("User $uname at $udom rejected by $uhome");
576: return 'no_host';
577: }
578: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
579: return 'no_host';
580: }
581:
582: # ---------------------- Find the homebase for a user from domain's lib servers
583:
584: my %homecache;
585: sub homeserver {
586: my ($uname,$udom,$ignoreBadCache)=@_;
587: my $index="$uname:$udom";
588:
589: if (exists($homecache{$index})) { return $homecache{$index}; }
590: my $tryserver;
591: foreach $tryserver (keys %libserv) {
592: next if ($ignoreBadCache ne 'true' &&
593: exists($badServerCache{$tryserver}));
594: if ($hostdom{$tryserver} eq $udom) {
595: my $answer=reply("home:$udom:$uname",$tryserver);
596: if ($answer eq 'found') {
597: return $homecache{$index}=$tryserver;
598: } elsif ($answer eq 'no_host') {
599: $badServerCache{$tryserver}=1;
600: }
601: }
602: }
603: return 'no_host';
604: }
605:
606: # ------------------------------------- Find the usernames behind a list of IDs
607:
608: sub idget {
609: my ($udom,@ids)=@_;
610: my %returnhash=();
611:
612: my $tryserver;
613: foreach $tryserver (keys %libserv) {
614: if ($hostdom{$tryserver} eq $udom) {
615: my $idlist=join('&',@ids);
616: $idlist=~tr/A-Z/a-z/;
617: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
618: my @answer=();
619: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
620: @answer=split(/\&/,$reply);
621: } ;
622: my $i;
623: for ($i=0;$i<=$#ids;$i++) {
624: if ($answer[$i]) {
625: $returnhash{$ids[$i]}=$answer[$i];
626: }
627: }
628: }
629: }
630: return %returnhash;
631: }
632:
633: # ------------------------------------- Find the IDs behind a list of usernames
634:
635: sub idrget {
636: my ($udom,@unames)=@_;
637: my %returnhash=();
638: foreach (@unames) {
639: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
640: }
641: return %returnhash;
642: }
643:
644: # ------------------------------- Store away a list of names and associated IDs
645:
646: sub idput {
647: my ($udom,%ids)=@_;
648: my %servers=();
649: foreach (keys %ids) {
650: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
651: my $uhom=&homeserver($_,$udom);
652: if ($uhom ne 'no_host') {
653: my $id=&escape($ids{$_});
654: $id=~tr/A-Z/a-z/;
655: my $unam=&escape($_);
656: if ($servers{$uhom}) {
657: $servers{$uhom}.='&'.$id.'='.$unam;
658: } else {
659: $servers{$uhom}=$id.'='.$unam;
660: }
661: }
662: }
663: foreach (keys %servers) {
664: &critical('idput:'.$udom.':'.$servers{$_},$_);
665: }
666: }
667:
668: # --------------------------------------------------- Assign a key to a student
669:
670: sub assign_access_key {
671: #
672: # a valid key looks like uname:udom#comments
673: # comments are being appended
674: #
675: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
676: $kdom=
677: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
678: $knum=
679: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
680: $cdom=
681: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
682: $cnum=
683: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
684: $udom=$env{'user.name'} unless (defined($udom));
685: $uname=$env{'user.domain'} unless (defined($uname));
686: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
687: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
688: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
689: # assigned to this person
690: # - this should not happen,
691: # unless something went wrong
692: # the first time around
693: # ready to assign
694: $logentry=$1.'; '.$logentry;
695: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
696: $kdom,$knum) eq 'ok') {
697: # key now belongs to user
698: my $envkey='key.'.$cdom.'_'.$cnum;
699: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
700: &appenv('environment.'.$envkey => $ckey);
701: return 'ok';
702: } else {
703: return
704: 'error: Count not permanently assign key, will need to be re-entered later.';
705: }
706: } else {
707: return 'error: Could not assign key, try again later.';
708: }
709: } elsif (!$existing{$ckey}) {
710: # the key does not exist
711: return 'error: The key does not exist';
712: } else {
713: # the key is somebody else's
714: return 'error: The key is already in use';
715: }
716: }
717:
718: # ------------------------------------------ put an additional comment on a key
719:
720: sub comment_access_key {
721: #
722: # a valid key looks like uname:udom#comments
723: # comments are being appended
724: #
725: my ($ckey,$cdom,$cnum,$logentry)=@_;
726: $cdom=
727: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
728: $cnum=
729: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
730: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
731: if ($existing{$ckey}) {
732: $existing{$ckey}.='; '.$logentry;
733: # ready to assign
734: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
735: $cdom,$cnum) eq 'ok') {
736: return 'ok';
737: } else {
738: return 'error: Count not store comment.';
739: }
740: } else {
741: # the key does not exist
742: return 'error: The key does not exist';
743: }
744: }
745:
746: # ------------------------------------------------------ Generate a set of keys
747:
748: sub generate_access_keys {
749: my ($number,$cdom,$cnum,$logentry)=@_;
750: $cdom=
751: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
752: $cnum=
753: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
754: unless (&allowed('mky',$cdom)) { return 0; }
755: unless (($cdom) && ($cnum)) { return 0; }
756: if ($number>10000) { return 0; }
757: sleep(2); # make sure don't get same seed twice
758: srand(time()^($$+($$<<15))); # from "Programming Perl"
759: my $total=0;
760: for (my $i=1;$i<=$number;$i++) {
761: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
762: sprintf("%lx",int(100000*rand)).'-'.
763: sprintf("%lx",int(100000*rand));
764: $newkey=~s/1/g/g; # folks mix up 1 and l
765: $newkey=~s/0/h/g; # and also 0 and O
766: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
767: if ($existing{$newkey}) {
768: $i--;
769: } else {
770: if (&put('accesskeys',
771: { $newkey => '# generated '.localtime().
772: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
773: '; '.$logentry },
774: $cdom,$cnum) eq 'ok') {
775: $total++;
776: }
777: }
778: }
779: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
780: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
781: return $total;
782: }
783:
784: # ------------------------------------------------------- Validate an accesskey
785:
786: sub validate_access_key {
787: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
788: $cdom=
789: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
790: $cnum=
791: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
792: $udom=$env{'user.domain'} unless (defined($udom));
793: $uname=$env{'user.name'} unless (defined($uname));
794: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
795: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
796: }
797:
798: # ------------------------------------- Find the section of student in a course
799: sub devalidate_getsection_cache {
800: my ($udom,$unam,$courseid)=@_;
801: $courseid=~s/\_/\//g;
802: $courseid=~s/^(\w)/\/$1/;
803: my $hashid="$udom:$unam:$courseid";
804: &devalidate_cache_new('getsection',$hashid);
805: }
806:
807: sub getsection {
808: my ($udom,$unam,$courseid)=@_;
809: my $cachetime=1800;
810: $courseid=~s/\_/\//g;
811: $courseid=~s/^(\w)/\/$1/;
812:
813: my $hashid="$udom:$unam:$courseid";
814: my ($result,$cached)=&is_cached_new('getsection',$hashid);
815: if (defined($cached)) { return $result; }
816:
817: my %Pending;
818: my %Expired;
819: #
820: # Each role can either have not started yet (pending), be active,
821: # or have expired.
822: #
823: # If there is an active role, we are done.
824: #
825: # If there is more than one role which has not started yet,
826: # choose the one which will start sooner
827: # If there is one role which has not started yet, return it.
828: #
829: # If there is more than one expired role, choose the one which ended last.
830: # If there is a role which has expired, return it.
831: #
832: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
833: &homeserver($unam,$udom)))) {
834: my ($key,$value)=split(/\=/,$_);
835: $key=&unescape($key);
836: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
837: my $section=$1;
838: if ($key eq $courseid.'_st') { $section=''; }
839: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
840: my $now=time;
841: if (defined($end) && $end && ($now > $end)) {
842: $Expired{$end}=$section;
843: next;
844: }
845: if (defined($start) && $start && ($now < $start)) {
846: $Pending{$start}=$section;
847: next;
848: }
849: return &do_cache_new('getsection',$hashid,$section,$cachetime);
850: }
851: #
852: # Presumedly there will be few matching roles from the above
853: # loop and the sorting time will be negligible.
854: if (scalar(keys(%Pending))) {
855: my ($time) = sort {$a <=> $b} keys(%Pending);
856: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
857: }
858: if (scalar(keys(%Expired))) {
859: my @sorted = sort {$a <=> $b} keys(%Expired);
860: my $time = pop(@sorted);
861: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
862: }
863: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
864: }
865:
866: sub save_cache {
867: &purge_remembered();
868: #&Apache::loncommon::validate_page();
869: undef(%env);
870: undef($env_loaded);
871: }
872:
873: my $to_remember=-1;
874: my %remembered;
875: my %accessed;
876: my $kicks=0;
877: my $hits=0;
878: sub devalidate_cache_new {
879: my ($name,$id,$debug) = @_;
880: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
881: $id=&escape($name.':'.$id);
882: $memcache->delete($id);
883: delete($remembered{$id});
884: delete($accessed{$id});
885: }
886:
887: sub is_cached_new {
888: my ($name,$id,$debug) = @_;
889: $id=&escape($name.':'.$id);
890: if (exists($remembered{$id})) {
891: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
892: $accessed{$id}=[&gettimeofday()];
893: $hits++;
894: return ($remembered{$id},1);
895: }
896: my $value = $memcache->get($id);
897: if (!(defined($value))) {
898: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
899: return (undef,undef);
900: }
901: if ($value eq '__undef__') {
902: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
903: $value=undef;
904: }
905: &make_room($id,$value,$debug);
906: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
907: return ($value,1);
908: }
909:
910: sub do_cache_new {
911: my ($name,$id,$value,$time,$debug) = @_;
912: $id=&escape($name.':'.$id);
913: my $setvalue=$value;
914: if (!defined($setvalue)) {
915: $setvalue='__undef__';
916: }
917: if (!defined($time) ) {
918: $time=600;
919: }
920: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
921: $memcache->set($id,$setvalue,$time);
922: # need to make a copy of $value
923: #&make_room($id,$value,$debug);
924: return $value;
925: }
926:
927: sub make_room {
928: my ($id,$value,$debug)=@_;
929: $remembered{$id}=$value;
930: if ($to_remember<0) { return; }
931: $accessed{$id}=[&gettimeofday()];
932: if (scalar(keys(%remembered)) <= $to_remember) { return; }
933: my $to_kick;
934: my $max_time=0;
935: foreach my $other (keys(%accessed)) {
936: if (&tv_interval($accessed{$other}) > $max_time) {
937: $to_kick=$other;
938: $max_time=&tv_interval($accessed{$other});
939: }
940: }
941: delete($remembered{$to_kick});
942: delete($accessed{$to_kick});
943: $kicks++;
944: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
945: return;
946: }
947:
948: sub purge_remembered {
949: #&logthis("Tossing ".scalar(keys(%remembered)));
950: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
951: undef(%remembered);
952: undef(%accessed);
953: }
954: # ------------------------------------- Read an entry from a user's environment
955:
956: sub userenvironment {
957: my ($udom,$unam,@what)=@_;
958: my %returnhash=();
959: my @answer=split(/\&/,
960: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
961: &homeserver($unam,$udom)));
962: my $i;
963: for ($i=0;$i<=$#what;$i++) {
964: $returnhash{$what[$i]}=&unescape($answer[$i]);
965: }
966: return %returnhash;
967: }
968:
969: # ---------------------------------------------------------- Get a studentphoto
970: sub studentphoto {
971: my ($udom,$unam,$ext) = @_;
972: my $home=&Apache::lonnet::homeserver($unam,$udom);
973: if (defined($env{'request.course.id'})) {
974: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
975: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
976: return(&retrievestudentphoto($udom,$unam,$ext));
977: } else {
978: my ($result,$perm_reqd)=
979: &Apache::lonnet::auto_photo_permission($unam,$udom);
980: if ($result eq 'ok') {
981: if (!($perm_reqd eq 'yes')) {
982: return(&retrievestudentphoto($udom,$unam,$ext));
983: }
984: }
985: }
986: }
987: } else {
988: my ($result,$perm_reqd) =
989: &Apache::lonnet::auto_photo_permission($unam,$udom);
990: if ($result eq 'ok') {
991: if (!($perm_reqd eq 'yes')) {
992: return(&retrievestudentphoto($udom,$unam,$ext));
993: }
994: }
995: }
996: return '/adm/lonKaputt/lonlogo_broken.gif';
997: }
998:
999: sub retrievestudentphoto {
1000: my ($udom,$unam,$ext,$type) = @_;
1001: my $home=&Apache::lonnet::homeserver($unam,$udom);
1002: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
1003: if ($ret eq 'ok') {
1004: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
1005: if ($type eq 'thumbnail') {
1006: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
1007: }
1008: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
1009: return $tokenurl;
1010: } else {
1011: if ($type eq 'thumbnail') {
1012: return '/adm/lonKaputt/genericstudent_tn.gif';
1013: } else {
1014: return '/adm/lonKaputt/lonlogo_broken.gif';
1015: }
1016: }
1017: }
1018:
1019: # -------------------------------------------------------------------- New chat
1020:
1021: sub chatsend {
1022: my ($newentry,$anon,$group)=@_;
1023: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1024: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1025: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1026: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1027: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1028: &escape($newentry)).':'.$group,$chome);
1029: }
1030:
1031: # ------------------------------------------ Find current version of a resource
1032:
1033: sub getversion {
1034: my $fname=&clutter(shift);
1035: unless ($fname=~/^\/res\//) { return -1; }
1036: return ¤tversion(&filelocation('',$fname));
1037: }
1038:
1039: sub currentversion {
1040: my $fname=shift;
1041: my ($result,$cached)=&is_cached_new('resversion',$fname);
1042: if (defined($cached)) { return $result; }
1043: my $author=$fname;
1044: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1045: my ($udom,$uname)=split(/\//,$author);
1046: my $home=homeserver($uname,$udom);
1047: if ($home eq 'no_host') {
1048: return -1;
1049: }
1050: my $answer=reply("currentversion:$fname",$home);
1051: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1052: return -1;
1053: }
1054: return &do_cache_new('resversion',$fname,$answer,600);
1055: }
1056:
1057: # ----------------------------- Subscribe to a resource, return URL if possible
1058:
1059: sub subscribe {
1060: my $fname=shift;
1061: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1062: $fname=~s/[\n\r]//g;
1063: my $author=$fname;
1064: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1065: my ($udom,$uname)=split(/\//,$author);
1066: my $home=homeserver($uname,$udom);
1067: if ($home eq 'no_host') {
1068: return 'not_found';
1069: }
1070: my $answer=reply("sub:$fname",$home);
1071: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1072: $answer.=' by '.$home;
1073: }
1074: return $answer;
1075: }
1076:
1077: # -------------------------------------------------------------- Replicate file
1078:
1079: sub repcopy {
1080: my $filename=shift;
1081: $filename=~s/\/+/\//g;
1082: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1083: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1084: if ($filename=~m|^/home/httpd/html/userfiles/| or
1085: $filename=~m -^/*(uploaded|editupload)/-) {
1086: return &repcopy_userfile($filename);
1087: }
1088: $filename=~s/[\n\r]//g;
1089: my $transname="$filename.in.transfer";
1090: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1091: my $remoteurl=subscribe($filename);
1092: if ($remoteurl =~ /^con_lost by/) {
1093: &logthis("Subscribe returned $remoteurl: $filename");
1094: return 'unavailable';
1095: } elsif ($remoteurl eq 'not_found') {
1096: #&logthis("Subscribe returned not_found: $filename");
1097: return 'not_found';
1098: } elsif ($remoteurl =~ /^rejected by/) {
1099: &logthis("Subscribe returned $remoteurl: $filename");
1100: return 'forbidden';
1101: } elsif ($remoteurl eq 'directory') {
1102: return 'ok';
1103: } else {
1104: my $author=$filename;
1105: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1106: my ($udom,$uname)=split(/\//,$author);
1107: my $home=homeserver($uname,$udom);
1108: unless ($home eq $perlvar{'lonHostID'}) {
1109: my @parts=split(/\//,$filename);
1110: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1111: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1112: &logthis("Malconfiguration for replication: $filename");
1113: return 'bad_request';
1114: }
1115: my $count;
1116: for ($count=5;$count<$#parts;$count++) {
1117: $path.="/$parts[$count]";
1118: if ((-e $path)!=1) {
1119: mkdir($path,0777);
1120: }
1121: }
1122: my $ua=new LWP::UserAgent;
1123: my $request=new HTTP::Request('GET',"$remoteurl");
1124: my $response=$ua->request($request,$transname);
1125: if ($response->is_error()) {
1126: unlink($transname);
1127: my $message=$response->status_line;
1128: &logthis("<font color=\"blue\">WARNING:"
1129: ." LWP get: $message: $filename</font>");
1130: return 'unavailable';
1131: } else {
1132: if ($remoteurl!~/\.meta$/) {
1133: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1134: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1135: if ($mresponse->is_error()) {
1136: unlink($filename.'.meta');
1137: &logthis(
1138: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1139: }
1140: }
1141: rename($transname,$filename);
1142: return 'ok';
1143: }
1144: }
1145: }
1146: }
1147:
1148: # ------------------------------------------------ Get server side include body
1149: sub ssi_body {
1150: my ($filelink,%form)=@_;
1151: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1152: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1153: }
1154: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1155: &ssi($filelink,%form));
1156: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+?// END LON-CAPA Internal\s*(-->)?\s||gs;
1157: $output=~s/^.*?\<body[^\>]*\>//si;
1158: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1159: return $output;
1160: }
1161:
1162: # --------------------------------------------------------- Server Side Include
1163:
1164: sub absolute_url {
1165: my ($host_name) = @_;
1166: my $protocol = ($ENV{'SERVER_PORT'} == 443?'https://':'http://');
1167: if ($host_name eq '') {
1168: $host_name = $ENV{'SERVER_NAME'};
1169: }
1170: return $protocol.$host_name;
1171: }
1172:
1173: sub absolute_url {
1174: my ($host_name) = @_;
1175: my $protocol = ($ENV{'SERVER_PORT'} == 443?'https://':'http://');
1176: if ($host_name eq '') {
1177: $host_name = $ENV{'SERVER_NAME'};
1178: }
1179: return $protocol.$host_name;
1180: }
1181:
1182: sub ssi {
1183:
1184: my ($fn,%form)=@_;
1185:
1186: my $ua=new LWP::UserAgent;
1187:
1188: my $request;
1189:
1190: $form{'no_update_last_known'}=1;
1191:
1192: if (%form) {
1193: $request=new HTTP::Request('POST',&absolute_url().$fn);
1194: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1195: } else {
1196: $request=new HTTP::Request('GET',&absolute_url().$fn);
1197: }
1198:
1199: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1200: my $response=$ua->request($request);
1201:
1202: return $response->content;
1203: }
1204:
1205: sub externalssi {
1206: my ($url)=@_;
1207: my $ua=new LWP::UserAgent;
1208: my $request=new HTTP::Request('GET',$url);
1209: my $response=$ua->request($request);
1210: return $response->content;
1211: }
1212:
1213: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1214:
1215: sub allowuploaded {
1216: my ($srcurl,$url)=@_;
1217: $url=&clutter(&declutter($url));
1218: my $dir=$url;
1219: $dir=~s/\/[^\/]+$//;
1220: my %httpref=();
1221: my $httpurl=&hreflocation('',$url);
1222: $httpref{'httpref.'.$httpurl}=$srcurl;
1223: &Apache::lonnet::appenv(%httpref);
1224: }
1225:
1226: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1227: # input: action, courseID, current domain, intended
1228: # path to file, source of file, instruction to parse file for objects,
1229: # ref to hash for embedded objects,
1230: # ref to hash for codebase of java objects.
1231: #
1232: # output: url to file (if action was uploaddoc),
1233: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1234: #
1235: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1236: # course.
1237: #
1238: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1239: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1240: # course's home server.
1241: #
1242: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1243: # be copied from $source (current location) to
1244: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1245: # and will then be copied to
1246: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1247: # course's home server.
1248: #
1249: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1250: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1251: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1252: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1253: # in course's home server.
1254: #
1255:
1256: sub process_coursefile {
1257: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1258: my $fetchresult;
1259: my $home=&homeserver($docuname,$docudom);
1260: if ($action eq 'propagate') {
1261: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1262: $home);
1263: } else {
1264: my $fpath = '';
1265: my $fname = $file;
1266: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1267: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1268: my $filepath = &build_filepath($fpath);
1269: if ($action eq 'copy') {
1270: if ($source eq '') {
1271: $fetchresult = 'no source file';
1272: return $fetchresult;
1273: } else {
1274: my $destination = $filepath.'/'.$fname;
1275: rename($source,$destination);
1276: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1277: $home);
1278: }
1279: } elsif ($action eq 'uploaddoc') {
1280: open(my $fh,'>'.$filepath.'/'.$fname);
1281: print $fh $env{'form.'.$source};
1282: close($fh);
1283: if ($parser eq 'parse') {
1284: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1285: unless ($parse_result eq 'ok') {
1286: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1287: }
1288: }
1289: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1290: $home);
1291: if ($fetchresult eq 'ok') {
1292: return '/uploaded/'.$fpath.'/'.$fname;
1293: } else {
1294: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1295: ' to host '.$home.': '.$fetchresult);
1296: return '/adm/notfound.html';
1297: }
1298: }
1299: }
1300: unless ( $fetchresult eq 'ok') {
1301: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1302: ' to host '.$home.': '.$fetchresult);
1303: }
1304: return $fetchresult;
1305: }
1306:
1307: sub build_filepath {
1308: my ($fpath) = @_;
1309: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1310: unless ($fpath eq '') {
1311: my @parts=split('/',$fpath);
1312: foreach my $part (@parts) {
1313: $filepath.= '/'.$part;
1314: if ((-e $filepath)!=1) {
1315: mkdir($filepath,0777);
1316: }
1317: }
1318: }
1319: return $filepath;
1320: }
1321:
1322: sub store_edited_file {
1323: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1324: my $file = $primary_url;
1325: $file =~ s#^/uploaded/$docudom/$docuname/##;
1326: my $fpath = '';
1327: my $fname = $file;
1328: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1329: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1330: my $filepath = &build_filepath($fpath);
1331: open(my $fh,'>'.$filepath.'/'.$fname);
1332: print $fh $content;
1333: close($fh);
1334: my $home=&homeserver($docuname,$docudom);
1335: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1336: $home);
1337: if ($$fetchresult eq 'ok') {
1338: return '/uploaded/'.$fpath.'/'.$fname;
1339: } else {
1340: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1341: ' to host '.$home.': '.$$fetchresult);
1342: return '/adm/notfound.html';
1343: }
1344: }
1345:
1346: sub clean_filename {
1347: my ($fname)=@_;
1348: # Replace Windows backslashes by forward slashes
1349: $fname=~s/\\/\//g;
1350: # Get rid of everything but the actual filename
1351: $fname=~s/^.*\/([^\/]+)$/$1/;
1352: # Replace spaces by underscores
1353: $fname=~s/\s+/\_/g;
1354: # Replace all other weird characters by nothing
1355: $fname=~s/[^\w\.\-]//g;
1356: # Replace all .\d. sequences with _\d. so they no longer look like version
1357: # numbers
1358: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1359: return $fname;
1360: }
1361:
1362: # --------------- Take an uploaded file and put it into the userfiles directory
1363: # input: $formname - the contents of the file are in $env{"form.$formname"}
1364: # the desired filenam is in $env{"form.$formname.filename"}
1365: # $coursedoc - if true up to the current course
1366: # if false
1367: # $subdir - directory in userfile to store the file into
1368: # $parser, $allfiles, $codebase - unknown
1369: #
1370: # output: url of file in userspace, or error: <message>
1371: # or /adm/notfound.html if failure to upload occurse
1372:
1373:
1374: sub userfileupload {
1375: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
1376: if (!defined($subdir)) { $subdir='unknown'; }
1377: my $fname=$env{'form.'.$formname.'.filename'};
1378: $fname=&clean_filename($fname);
1379: # See if there is anything left
1380: unless ($fname) { return 'error: no uploaded file'; }
1381: chop($env{'form.'.$formname});
1382: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1383: my $now = time;
1384: my $filepath = 'tmp/helprequests/'.$now;
1385: my @parts=split(/\//,$filepath);
1386: my $fullpath = $perlvar{'lonDaemons'};
1387: for (my $i=0;$i<@parts;$i++) {
1388: $fullpath .= '/'.$parts[$i];
1389: if ((-e $fullpath)!=1) {
1390: mkdir($fullpath,0777);
1391: }
1392: }
1393: open(my $fh,'>'.$fullpath.'/'.$fname);
1394: print $fh $env{'form.'.$formname};
1395: close($fh);
1396: return $fullpath.'/'.$fname;
1397: } elsif (($formname eq 'coursecreatorxml') && ($subdir eq 'batchupload')) { #files uploaded to create course page are handled differently
1398: my $filepath = 'tmp/addcourse/'.$destudom.'/web/'.$env{'user.name'}.
1399: '_'.$env{'user.domain'}.'/pending';
1400: my @parts=split(/\//,$filepath);
1401: my $fullpath = $perlvar{'lonDaemons'};
1402: for (my $i=0;$i<@parts;$i++) {
1403: $fullpath .= '/'.$parts[$i];
1404: if ((-e $fullpath)!=1) {
1405: mkdir($fullpath,0777);
1406: }
1407: }
1408: open(my $fh,'>'.$fullpath.'/'.$fname);
1409: print $fh $env{'form.'.$formname};
1410: close($fh);
1411: return $fullpath.'/'.$fname;
1412: }
1413:
1414: # Create the directory if not present
1415: $fname="$subdir/$fname";
1416: if ($coursedoc) {
1417: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1418: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1419: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1420: return &finishuserfileupload($docuname,$docudom,
1421: $formname,$fname,$parser,$allfiles,
1422: $codebase);
1423: } else {
1424: $fname=$env{'form.folder'}.'/'.$fname;
1425: return &process_coursefile('uploaddoc',$docuname,$docudom,
1426: $fname,$formname,$parser,
1427: $allfiles,$codebase);
1428: }
1429: } elsif (defined($destuname)) {
1430: my $docuname=$destuname;
1431: my $docudom=$destudom;
1432: return &finishuserfileupload($docuname,$docudom,$formname,
1433: $fname,$parser,$allfiles,$codebase);
1434:
1435: } else {
1436: my $docuname=$env{'user.name'};
1437: my $docudom=$env{'user.domain'};
1438: if (exists($env{'form.group'})) {
1439: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1440: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1441: }
1442: return &finishuserfileupload($docuname,$docudom,$formname,
1443: $fname,$parser,$allfiles,$codebase);
1444: }
1445: }
1446:
1447: sub finishuserfileupload {
1448: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1449: my $path=$docudom.'/'.$docuname.'/';
1450: my $filepath=$perlvar{'lonDocRoot'};
1451: my ($fnamepath,$file);
1452: $file=$fname;
1453: if ($fname=~m|/|) {
1454: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1455: $path.=$fnamepath.'/';
1456: }
1457: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1458: my $count;
1459: for ($count=4;$count<=$#parts;$count++) {
1460: $filepath.="/$parts[$count]";
1461: if ((-e $filepath)!=1) {
1462: mkdir($filepath,0777);
1463: }
1464: }
1465: # Save the file
1466: {
1467: if (!open(FH,'>'.$filepath.'/'.$file)) {
1468: &logthis('Failed to create '.$filepath.'/'.$file);
1469: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1470: return '/adm/notfound.html';
1471: }
1472: if (!print FH ($env{'form.'.$formname})) {
1473: &logthis('Failed to write to '.$filepath.'/'.$file);
1474: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1475: return '/adm/notfound.html';
1476: }
1477: close(FH);
1478: }
1479: if ($parser eq 'parse') {
1480: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1481: $codebase);
1482: unless ($parse_result eq 'ok') {
1483: &logthis('Failed to parse '.$filepath.$file.
1484: ' for embedded media: '.$parse_result);
1485: }
1486: }
1487: # Notify homeserver to grep it
1488: #
1489: my $docuhome=&homeserver($docuname,$docudom);
1490: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1491: if ($fetchresult eq 'ok') {
1492: #
1493: # Return the URL to it
1494: return '/uploaded/'.$path.$file;
1495: } else {
1496: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1497: ': '.$fetchresult);
1498: return '/adm/notfound.html';
1499: }
1500: }
1501:
1502: sub extract_embedded_items {
1503: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1504: my @state = ();
1505: my %javafiles = (
1506: codebase => '',
1507: code => '',
1508: archive => ''
1509: );
1510: my %mediafiles = (
1511: src => '',
1512: movie => '',
1513: );
1514: my $p;
1515: if ($content) {
1516: $p = HTML::LCParser->new($content);
1517: } else {
1518: $p = HTML::LCParser->new($filepath.'/'.$file);
1519: }
1520: while (my $t=$p->get_token()) {
1521: if ($t->[0] eq 'S') {
1522: my ($tagname, $attr) = ($t->[1],$t->[2]);
1523: push (@state, $tagname);
1524: if (lc($tagname) eq 'allow') {
1525: &add_filetype($allfiles,$attr->{'src'},'src');
1526: }
1527: if (lc($tagname) eq 'img') {
1528: &add_filetype($allfiles,$attr->{'src'},'src');
1529: }
1530: if (lc($tagname) eq 'script') {
1531: if ($attr->{'archive'} =~ /\.jar$/i) {
1532: &add_filetype($allfiles,$attr->{'archive'},'archive');
1533: } else {
1534: &add_filetype($allfiles,$attr->{'src'},'src');
1535: }
1536: }
1537: if (lc($tagname) eq 'link') {
1538: if (lc($attr->{'rel'}) eq 'stylesheet') {
1539: &add_filetype($allfiles,$attr->{'href'},'href');
1540: }
1541: }
1542: if (lc($tagname) eq 'object' ||
1543: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1544: foreach my $item (keys(%javafiles)) {
1545: $javafiles{$item} = '';
1546: }
1547: }
1548: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1549: my $name = lc($attr->{'name'});
1550: foreach my $item (keys(%javafiles)) {
1551: if ($name eq $item) {
1552: $javafiles{$item} = $attr->{'value'};
1553: last;
1554: }
1555: }
1556: foreach my $item (keys(%mediafiles)) {
1557: if ($name eq $item) {
1558: &add_filetype($allfiles, $attr->{'value'}, 'value');
1559: last;
1560: }
1561: }
1562: }
1563: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1564: foreach my $item (keys(%javafiles)) {
1565: if ($attr->{$item}) {
1566: $javafiles{$item} = $attr->{$item};
1567: last;
1568: }
1569: }
1570: foreach my $item (keys(%mediafiles)) {
1571: if ($attr->{$item}) {
1572: &add_filetype($allfiles,$attr->{$item},$item);
1573: last;
1574: }
1575: }
1576: }
1577: } elsif ($t->[0] eq 'E') {
1578: my ($tagname) = ($t->[1]);
1579: if ($javafiles{'codebase'} ne '') {
1580: $javafiles{'codebase'} .= '/';
1581: }
1582: if (lc($tagname) eq 'applet' ||
1583: lc($tagname) eq 'object' ||
1584: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1585: ) {
1586: foreach my $item (keys(%javafiles)) {
1587: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1588: my $file=$javafiles{'codebase'}.$javafiles{$item};
1589: &add_filetype($allfiles,$file,$item);
1590: }
1591: }
1592: }
1593: pop @state;
1594: }
1595: }
1596: return 'ok';
1597: }
1598:
1599: sub add_filetype {
1600: my ($allfiles,$file,$type)=@_;
1601: if (exists($allfiles->{$file})) {
1602: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1603: push(@{$allfiles->{$file}}, &escape($type));
1604: }
1605: } else {
1606: @{$allfiles->{$file}} = (&escape($type));
1607: }
1608: }
1609:
1610: sub removeuploadedurl {
1611: my ($url)=@_;
1612: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1613: return &removeuserfile($uname,$udom,$fname);
1614: }
1615:
1616: sub removeuserfile {
1617: my ($docuname,$docudom,$fname)=@_;
1618: my $home=&homeserver($docuname,$docudom);
1619: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1620: }
1621:
1622: sub mkdiruserfile {
1623: my ($docuname,$docudom,$dir)=@_;
1624: my $home=&homeserver($docuname,$docudom);
1625: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1626: }
1627:
1628: sub renameuserfile {
1629: my ($docuname,$docudom,$old,$new)=@_;
1630: my $home=&homeserver($docuname,$docudom);
1631: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1632: &escape("$new"),$home);
1633: }
1634:
1635: # ------------------------------------------------------------------------- Log
1636:
1637: sub log {
1638: my ($dom,$nam,$hom,$what)=@_;
1639: return critical("log:$dom:$nam:$what",$hom);
1640: }
1641:
1642: # ------------------------------------------------------------------ Course Log
1643: #
1644: # This routine flushes several buffers of non-mission-critical nature
1645: #
1646:
1647: sub flushcourselogs {
1648: &logthis('Flushing log buffers');
1649: #
1650: # course logs
1651: # This is a log of all transactions in a course, which can be used
1652: # for data mining purposes
1653: #
1654: # It also collects the courseid database, which lists last transaction
1655: # times and course titles for all courseids
1656: #
1657: my %courseidbuffer=();
1658: foreach (keys %courselogs) {
1659: my $crsid=$_;
1660: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1661: &escape($courselogs{$crsid}),
1662: $coursehombuf{$crsid}) eq 'ok') {
1663: delete $courselogs{$crsid};
1664: } else {
1665: &logthis('Failed to flush log buffer for '.$crsid);
1666: if (length($courselogs{$crsid})>40000) {
1667: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1668: " exceeded maximum size, deleting.</font>");
1669: delete $courselogs{$crsid};
1670: }
1671: }
1672: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1673: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1674: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1675: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1676: } else {
1677: $courseidbuffer{$coursehombuf{$crsid}}=
1678: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1679: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid}).':'.&escape($coursetypebuf{$crsid});
1680: }
1681: }
1682: #
1683: # Write course id database (reverse lookup) to homeserver of courses
1684: # Is used in pickcourse
1685: #
1686: foreach (keys %courseidbuffer) {
1687: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1688: }
1689: #
1690: # File accesses
1691: # Writes to the dynamic metadata of resources to get hit counts, etc.
1692: #
1693: foreach my $entry (keys(%accesshash)) {
1694: if ($entry =~ /___count$/) {
1695: my ($dom,$name);
1696: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1697: if (! defined($dom) || $dom eq '' ||
1698: ! defined($name) || $name eq '') {
1699: my $cid = $env{'request.course.id'};
1700: $dom = $env{'request.'.$cid.'.domain'};
1701: $name = $env{'request.'.$cid.'.num'};
1702: }
1703: my $value = $accesshash{$entry};
1704: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1705: my %temphash=($url => $value);
1706: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1707: if ($result eq 'ok') {
1708: delete $accesshash{$entry};
1709: } elsif ($result eq 'unknown_cmd') {
1710: # Target server has old code running on it.
1711: my %temphash=($entry => $value);
1712: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1713: delete $accesshash{$entry};
1714: }
1715: }
1716: } else {
1717: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1718: my %temphash=($entry => $accesshash{$entry});
1719: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1720: delete $accesshash{$entry};
1721: }
1722: }
1723: }
1724: #
1725: # Roles
1726: # Reverse lookup of user roles for course faculty/staff and co-authorship
1727: #
1728: foreach (keys %userrolehash) {
1729: my $entry=$_;
1730: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1731: split(/\:/,$entry);
1732: if (&Apache::lonnet::put('nohist_userroles',
1733: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1734: $rudom,$runame) eq 'ok') {
1735: delete $userrolehash{$entry};
1736: }
1737: }
1738: #
1739: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1740: #
1741: my %domrolebuffer = ();
1742: foreach my $entry (keys %domainrolehash) {
1743: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1744: if ($domrolebuffer{$rudom}) {
1745: $domrolebuffer{$rudom}.='&'.&escape($entry).
1746: '='.&escape($domainrolehash{$entry});
1747: } else {
1748: $domrolebuffer{$rudom}.=&escape($entry).
1749: '='.&escape($domainrolehash{$entry});
1750: }
1751: delete $domainrolehash{$entry};
1752: }
1753: foreach my $dom (keys(%domrolebuffer)) {
1754: foreach my $tryserver (keys %libserv) {
1755: if ($hostdom{$tryserver} eq $dom) {
1756: unless (&reply('domroleput:'.$dom.':'.
1757: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1758: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1759: }
1760: }
1761: }
1762: }
1763: $dumpcount++;
1764: }
1765:
1766: sub courselog {
1767: my $what=shift;
1768: $what=time.':'.$what;
1769: unless ($env{'request.course.id'}) { return ''; }
1770: $coursedombuf{$env{'request.course.id'}}=
1771: $env{'course.'.$env{'request.course.id'}.'.domain'};
1772: $coursenumbuf{$env{'request.course.id'}}=
1773: $env{'course.'.$env{'request.course.id'}.'.num'};
1774: $coursehombuf{$env{'request.course.id'}}=
1775: $env{'course.'.$env{'request.course.id'}.'.home'};
1776: $coursedescrbuf{$env{'request.course.id'}}=
1777: $env{'course.'.$env{'request.course.id'}.'.description'};
1778: $courseinstcodebuf{$env{'request.course.id'}}=
1779: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1780: $courseownerbuf{$env{'request.course.id'}}=
1781: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1782: $coursetypebuf{$env{'request.course.id'}}=
1783: $env{'course.'.$env{'request.course.id'}.'.type'};
1784: if (defined $courselogs{$env{'request.course.id'}}) {
1785: $courselogs{$env{'request.course.id'}}.='&'.$what;
1786: } else {
1787: $courselogs{$env{'request.course.id'}}.=$what;
1788: }
1789: if (length($courselogs{$env{'request.course.id'}})>4048) {
1790: &flushcourselogs();
1791: }
1792: }
1793:
1794: sub courseacclog {
1795: my $fnsymb=shift;
1796: unless ($env{'request.course.id'}) { return ''; }
1797: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1798: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1799: $what.=':POST';
1800: # FIXME: Probably ought to escape things....
1801: foreach (keys %env) {
1802: if ($_=~/^form\.(.*)/) {
1803: $what.=':'.$1.'='.$env{$_};
1804: }
1805: }
1806: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1807: # FIXME: We should not be depending on a form parameter that someone
1808: # editing lonsearchcat.pm might change in the future.
1809: if ($env{'form.phase'} eq 'course_search') {
1810: $what.= ':POST';
1811: # FIXME: Probably ought to escape things....
1812: foreach my $element ('courseexp','crsfulltext','crsrelated',
1813: 'crsdiscuss') {
1814: $what.=':'.$element.'='.$env{'form.'.$element};
1815: }
1816: }
1817: }
1818: &courselog($what);
1819: }
1820:
1821: sub countacc {
1822: my $url=&declutter(shift);
1823: return if (! defined($url) || $url eq '');
1824: unless ($env{'request.course.id'}) { return ''; }
1825: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1826: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1827: $accesshash{$key}++;
1828: }
1829:
1830: sub linklog {
1831: my ($from,$to)=@_;
1832: $from=&declutter($from);
1833: $to=&declutter($to);
1834: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1835: $accesshash{$to.'___'.$from.'___goto'}=1;
1836: }
1837:
1838: sub userrolelog {
1839: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1840: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1841: ($trole=~/^in/) || ($trole=~/^cc/) ||
1842: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1843: ($trole=~/^ta/)) {
1844: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1845: $userrolehash
1846: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1847: =$tend.':'.$tstart;
1848: }
1849: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1850: ($trole=~/^li/) || ($trole=~/^li/) ||
1851: ($trole=~/^au/) || ($trole=~/^dg/) ||
1852: ($trole=~/^sc/)) {
1853: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1854: $domainrolehash
1855: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1856: = $tend.':'.$tstart;
1857: }
1858: }
1859:
1860: sub get_course_adv_roles {
1861: my $cid=shift;
1862: $cid=$env{'request.course.id'} unless (defined($cid));
1863: my %coursehash=&coursedescription($cid);
1864: my %nothide=();
1865: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1866: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1867: }
1868: my %returnhash=();
1869: my %dumphash=
1870: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1871: my $now=time;
1872: foreach (keys %dumphash) {
1873: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1874: if (($tstart) && ($tstart<0)) { next; }
1875: if (($tend) && ($tend<$now)) { next; }
1876: if (($tstart) && ($now<$tstart)) { next; }
1877: my ($role,$username,$domain,$section)=split(/\:/,$_);
1878: if ($username eq '' || $domain eq '') { next; }
1879: if ((&privileged($username,$domain)) &&
1880: (!$nothide{$username.':'.$domain})) { next; }
1881: if ($role eq 'cr') { next; }
1882: my $key=&plaintext($role);
1883: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1884: if ($returnhash{$key}) {
1885: $returnhash{$key}.=','.$username.':'.$domain;
1886: } else {
1887: $returnhash{$key}=$username.':'.$domain;
1888: }
1889: }
1890: return %returnhash;
1891: }
1892:
1893: sub get_my_roles {
1894: my ($uname,$udom)=@_;
1895: unless (defined($uname)) { $uname=$env{'user.name'}; }
1896: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1897: my %dumphash=
1898: &dump('nohist_userroles',$udom,$uname);
1899: my %returnhash=();
1900: my $now=time;
1901: foreach (keys %dumphash) {
1902: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1903: if (($tstart) && ($tstart<0)) { next; }
1904: if (($tend) && ($tend<$now)) { next; }
1905: if (($tstart) && ($now<$tstart)) { next; }
1906: my ($role,$username,$domain,$section)=split(/\:/,$_);
1907: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1908: }
1909: return %returnhash;
1910: }
1911:
1912: # ----------------------------------------------------- Frontpage Announcements
1913: #
1914: #
1915:
1916: sub postannounce {
1917: my ($server,$text)=@_;
1918: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1919: unless ($text=~/\w/) { $text=''; }
1920: return &reply('setannounce:'.&escape($text),$server);
1921: }
1922:
1923: sub getannounce {
1924:
1925: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1926: my $announcement='';
1927: while (<$fh>) { $announcement .=$_; }
1928: close($fh);
1929: if ($announcement=~/\w/) {
1930: return
1931: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1932: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1933: } else {
1934: return '';
1935: }
1936: } else {
1937: return '';
1938: }
1939: }
1940:
1941: # ---------------------------------------------------------- Course ID routines
1942: # Deal with domain's nohist_courseid.db files
1943: #
1944:
1945: sub courseidput {
1946: my ($domain,$what,$coursehome)=@_;
1947: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1948: }
1949:
1950: sub courseiddump {
1951: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref,$typefilter)=@_;
1952: my %returnhash=();
1953: unless ($domfilter) { $domfilter=''; }
1954: foreach my $tryserver (keys %libserv) {
1955: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1956: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1957: foreach (
1958: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1959: $sincefilter.':'.&escape($descfilter).':'.
1960: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter).':'.&escape($typefilter),
1961: $tryserver))) {
1962: my ($key,$value)=split(/\=/,$_);
1963: if (($key) && ($value)) {
1964: $returnhash{&unescape($key)}=$value;
1965: }
1966: }
1967: }
1968: }
1969: }
1970: return %returnhash;
1971: }
1972:
1973: # ---------------------------------------------------------- DC e-mail
1974:
1975: sub dcmailput {
1976: my ($domain,$msgid,$message,$server)=@_;
1977: my $status = &Apache::lonnet::critical(
1978: 'dcmailput:'.$domain.':'.&escape($msgid).'='.
1979: &escape($message),$server);
1980: return $status;
1981: }
1982:
1983: sub dcmaildump {
1984: my ($dom,$startdate,$enddate,$senders) = @_;
1985: my %returnhash=();
1986: if (exists($domain_primary{$dom})) {
1987: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
1988: &escape($enddate).':';
1989: my @esc_senders=map { &escape($_)} @$senders;
1990: $cmd.=&escape(join('&',@esc_senders));
1991: foreach (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
1992: my ($key,$value) = split(/\=/,$_);
1993: if (($key) && ($value)) {
1994: $returnhash{&unescape($key)} = &unescape($value);
1995: }
1996: }
1997: }
1998: return %returnhash;
1999: }
2000: # ---------------------------------------------------------- Domain roles
2001:
2002: sub get_domain_roles {
2003: my ($dom,$roles,$startdate,$enddate)=@_;
2004: if (undef($startdate) || $startdate eq '') {
2005: $startdate = '.';
2006: }
2007: if (undef($enddate) || $enddate eq '') {
2008: $enddate = '.';
2009: }
2010: my $rolelist = join(':',@{$roles});
2011: my %personnel = ();
2012: foreach my $tryserver (keys(%libserv)) {
2013: if ($hostdom{$tryserver} eq $dom) {
2014: %{$personnel{$tryserver}}=();
2015: foreach (
2016: split(/\&/,&reply('domrolesdump:'.$dom.':'.
2017: &escape($startdate).':'.&escape($enddate).':'.
2018: &escape($rolelist), $tryserver))) {
2019: my($key,$value) = split(/\=/,$_);
2020: if (($key) && ($value)) {
2021: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
2022: }
2023: }
2024: }
2025: }
2026: return %personnel;
2027: }
2028:
2029: # ----------------------------------------------------------- Check out an item
2030:
2031: sub get_first_access {
2032: my ($type,$argsymb)=@_;
2033: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2034: if ($argsymb) { $symb=$argsymb; }
2035: my ($map,$id,$res)=&decode_symb($symb);
2036: if ($type eq 'map') {
2037: $res=&symbread($map);
2038: } else {
2039: $res=$symb;
2040: }
2041: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
2042: return $times{"$courseid\0$res"};
2043: }
2044:
2045: sub set_first_access {
2046: my ($type)=@_;
2047: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2048: my ($map,$id,$res)=&decode_symb($symb);
2049: if ($type eq 'map') {
2050: $res=&symbread($map);
2051: } else {
2052: $res=$symb;
2053: }
2054: my $firstaccess=&get_first_access($type,$symb);
2055: if (!$firstaccess) {
2056: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2057: }
2058: return 'already_set';
2059: }
2060:
2061: sub checkout {
2062: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2063: my $now=time;
2064: my $lonhost=$perlvar{'lonHostID'};
2065: my $infostr=&escape(
2066: 'CHECKOUTTOKEN&'.
2067: $tuname.'&'.
2068: $tudom.'&'.
2069: $tcrsid.'&'.
2070: $symb.'&'.
2071: $now.'&'.$ENV{'REMOTE_ADDR'});
2072: my $token=&reply('tmpput:'.$infostr,$lonhost);
2073: if ($token=~/^error\:/) {
2074: &logthis("<font color=\"blue\">WARNING: ".
2075: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2076: "</font>");
2077: return '';
2078: }
2079:
2080: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2081: $token=~tr/a-z/A-Z/;
2082:
2083: my %infohash=('resource.0.outtoken' => $token,
2084: 'resource.0.checkouttime' => $now,
2085: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2086:
2087: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2088: return '';
2089: } else {
2090: &logthis("<font color=\"blue\">WARNING: ".
2091: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2092: "</font>");
2093: }
2094:
2095: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2096: &escape('Checkout '.$infostr.' - '.
2097: $token)) ne 'ok') {
2098: return '';
2099: } else {
2100: &logthis("<font color=\"blue\">WARNING: ".
2101: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2102: "</font>");
2103: }
2104: return $token;
2105: }
2106:
2107: # ------------------------------------------------------------ Check in an item
2108:
2109: sub checkin {
2110: my $token=shift;
2111: my $now=time;
2112: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2113: $lonhost=~tr/A-Z/a-z/;
2114: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
2115: $dtoken=~s/\W/\_/g;
2116: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2117: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2118:
2119: unless (($tuname) && ($tudom)) {
2120: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2121: return '';
2122: }
2123:
2124: unless (&allowed('mgr',$tcrsid)) {
2125: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2126: $env{'user.name'}.' - '.$env{'user.domain'});
2127: return '';
2128: }
2129:
2130: my %infohash=('resource.0.intoken' => $token,
2131: 'resource.0.checkintime' => $now,
2132: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2133:
2134: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2135: return '';
2136: }
2137:
2138: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2139: &escape('Checkin - '.$token)) ne 'ok') {
2140: return '';
2141: }
2142:
2143: return ($symb,$tuname,$tudom,$tcrsid);
2144: }
2145:
2146: # --------------------------------------------- Set Expire Date for Spreadsheet
2147:
2148: sub expirespread {
2149: my ($uname,$udom,$stype,$usymb)=@_;
2150: my $cid=$env{'request.course.id'};
2151: if ($cid) {
2152: my $now=time;
2153: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2154: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2155: $env{'course.'.$cid.'.num'}.
2156: ':nohist_expirationdates:'.
2157: &escape($key).'='.$now,
2158: $env{'course.'.$cid.'.home'})
2159: }
2160: return 'ok';
2161: }
2162:
2163: # ----------------------------------------------------- Devalidate Spreadsheets
2164:
2165: sub devalidate {
2166: my ($symb,$uname,$udom)=@_;
2167: my $cid=$env{'request.course.id'};
2168: if ($cid) {
2169: # delete the stored spreadsheets for
2170: # - the student level sheet of this user in course's homespace
2171: # - the assessment level sheet for this resource
2172: # for this user in user's homespace
2173: # - current conditional state info
2174: my $key=$uname.':'.$udom.':';
2175: my $status=
2176: &del('nohist_calculatedsheets',
2177: [$key.'studentcalc:'],
2178: $env{'course.'.$cid.'.domain'},
2179: $env{'course.'.$cid.'.num'})
2180: .' '.
2181: &del('nohist_calculatedsheets_'.$cid,
2182: [$key.'assesscalc:'.$symb],$udom,$uname);
2183: unless ($status eq 'ok ok') {
2184: &logthis('Could not devalidate spreadsheet '.
2185: $uname.' at '.$udom.' for '.
2186: $symb.': '.$status);
2187: }
2188: &delenv('user.state.'.$cid);
2189: }
2190: }
2191:
2192: sub get_scalar {
2193: my ($string,$end) = @_;
2194: my $value;
2195: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2196: $value = $1;
2197: } elsif ($$string =~ s/^([^&]*?)&//) {
2198: $value = $1;
2199: }
2200: return &unescape($value);
2201: }
2202:
2203: sub array2str {
2204: my (@array) = @_;
2205: my $result=&arrayref2str(\@array);
2206: $result=~s/^__ARRAY_REF__//;
2207: $result=~s/__END_ARRAY_REF__$//;
2208: return $result;
2209: }
2210:
2211: sub arrayref2str {
2212: my ($arrayref) = @_;
2213: my $result='__ARRAY_REF__';
2214: foreach my $elem (@$arrayref) {
2215: if(ref($elem) eq 'ARRAY') {
2216: $result.=&arrayref2str($elem).'&';
2217: } elsif(ref($elem) eq 'HASH') {
2218: $result.=&hashref2str($elem).'&';
2219: } elsif(ref($elem)) {
2220: #print("Got a ref of ".(ref($elem))." skipping.");
2221: } else {
2222: $result.=&escape($elem).'&';
2223: }
2224: }
2225: $result=~s/\&$//;
2226: $result .= '__END_ARRAY_REF__';
2227: return $result;
2228: }
2229:
2230: sub hash2str {
2231: my (%hash) = @_;
2232: my $result=&hashref2str(\%hash);
2233: $result=~s/^__HASH_REF__//;
2234: $result=~s/__END_HASH_REF__$//;
2235: return $result;
2236: }
2237:
2238: sub hashref2str {
2239: my ($hashref)=@_;
2240: my $result='__HASH_REF__';
2241: foreach (sort(keys(%$hashref))) {
2242: if (ref($_) eq 'ARRAY') {
2243: $result.=&arrayref2str($_).'=';
2244: } elsif (ref($_) eq 'HASH') {
2245: $result.=&hashref2str($_).'=';
2246: } elsif (ref($_)) {
2247: $result.='=';
2248: #print("Got a ref of ".(ref($_))." skipping.");
2249: } else {
2250: if ($_) {$result.=&escape($_).'=';} else { last; }
2251: }
2252:
2253: if(ref($hashref->{$_}) eq 'ARRAY') {
2254: $result.=&arrayref2str($hashref->{$_}).'&';
2255: } elsif(ref($hashref->{$_}) eq 'HASH') {
2256: $result.=&hashref2str($hashref->{$_}).'&';
2257: } elsif(ref($hashref->{$_})) {
2258: $result.='&';
2259: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2260: } else {
2261: $result.=&escape($hashref->{$_}).'&';
2262: }
2263: }
2264: $result=~s/\&$//;
2265: $result .= '__END_HASH_REF__';
2266: return $result;
2267: }
2268:
2269: sub str2hash {
2270: my ($string)=@_;
2271: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2272: return %$hash;
2273: }
2274:
2275: sub str2hashref {
2276: my ($string) = @_;
2277:
2278: my %hash;
2279:
2280: if($string !~ /^__HASH_REF__/) {
2281: if (! ($string eq '' || !defined($string))) {
2282: $hash{'error'}='Not hash reference';
2283: }
2284: return (\%hash, $string);
2285: }
2286:
2287: $string =~ s/^__HASH_REF__//;
2288:
2289: while($string !~ /^__END_HASH_REF__/) {
2290: #key
2291: my $key='';
2292: if($string =~ /^__HASH_REF__/) {
2293: ($key, $string)=&str2hashref($string);
2294: if(defined($key->{'error'})) {
2295: $hash{'error'}='Bad data';
2296: return (\%hash, $string);
2297: }
2298: } elsif($string =~ /^__ARRAY_REF__/) {
2299: ($key, $string)=&str2arrayref($string);
2300: if($key->[0] eq 'Array reference error') {
2301: $hash{'error'}='Bad data';
2302: return (\%hash, $string);
2303: }
2304: } else {
2305: $string =~ s/^(.*?)=//;
2306: $key=&unescape($1);
2307: }
2308: $string =~ s/^=//;
2309:
2310: #value
2311: my $value='';
2312: if($string =~ /^__HASH_REF__/) {
2313: ($value, $string)=&str2hashref($string);
2314: if(defined($value->{'error'})) {
2315: $hash{'error'}='Bad data';
2316: return (\%hash, $string);
2317: }
2318: } elsif($string =~ /^__ARRAY_REF__/) {
2319: ($value, $string)=&str2arrayref($string);
2320: if($value->[0] eq 'Array reference error') {
2321: $hash{'error'}='Bad data';
2322: return (\%hash, $string);
2323: }
2324: } else {
2325: $value=&get_scalar(\$string,'__END_HASH_REF__');
2326: }
2327: $string =~ s/^&//;
2328:
2329: $hash{$key}=$value;
2330: }
2331:
2332: $string =~ s/^__END_HASH_REF__//;
2333:
2334: return (\%hash, $string);
2335: }
2336:
2337: sub str2array {
2338: my ($string)=@_;
2339: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2340: return @$array;
2341: }
2342:
2343: sub str2arrayref {
2344: my ($string) = @_;
2345: my @array;
2346:
2347: if($string !~ /^__ARRAY_REF__/) {
2348: if (! ($string eq '' || !defined($string))) {
2349: $array[0]='Array reference error';
2350: }
2351: return (\@array, $string);
2352: }
2353:
2354: $string =~ s/^__ARRAY_REF__//;
2355:
2356: while($string !~ /^__END_ARRAY_REF__/) {
2357: my $value='';
2358: if($string =~ /^__HASH_REF__/) {
2359: ($value, $string)=&str2hashref($string);
2360: if(defined($value->{'error'})) {
2361: $array[0] ='Array reference error';
2362: return (\@array, $string);
2363: }
2364: } elsif($string =~ /^__ARRAY_REF__/) {
2365: ($value, $string)=&str2arrayref($string);
2366: if($value->[0] eq 'Array reference error') {
2367: $array[0] ='Array reference error';
2368: return (\@array, $string);
2369: }
2370: } else {
2371: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2372: }
2373: $string =~ s/^&//;
2374:
2375: push(@array, $value);
2376: }
2377:
2378: $string =~ s/^__END_ARRAY_REF__//;
2379:
2380: return (\@array, $string);
2381: }
2382:
2383: # -------------------------------------------------------------------Temp Store
2384:
2385: sub tmpreset {
2386: my ($symb,$namespace,$domain,$stuname) = @_;
2387: if (!$symb) {
2388: $symb=&symbread();
2389: if (!$symb) { $symb= $env{'request.url'}; }
2390: }
2391: $symb=escape($symb);
2392:
2393: if (!$namespace) { $namespace=$env{'request.state'}; }
2394: $namespace=~s/\//\_/g;
2395: $namespace=~s/\W//g;
2396:
2397: if (!$domain) { $domain=$env{'user.domain'}; }
2398: if (!$stuname) { $stuname=$env{'user.name'}; }
2399: if ($domain eq 'public' && $stuname eq 'public') {
2400: $stuname=$ENV{'REMOTE_ADDR'};
2401: }
2402: my $path=$perlvar{'lonDaemons'}.'/tmp';
2403: my %hash;
2404: if (tie(%hash,'GDBM_File',
2405: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2406: &GDBM_WRCREAT(),0640)) {
2407: foreach my $key (keys %hash) {
2408: if ($key=~ /:$symb/) {
2409: delete($hash{$key});
2410: }
2411: }
2412: }
2413: }
2414:
2415: sub tmpstore {
2416: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2417:
2418: if (!$symb) {
2419: $symb=&symbread();
2420: if (!$symb) { $symb= $env{'request.url'}; }
2421: }
2422: $symb=escape($symb);
2423:
2424: if (!$namespace) {
2425: # I don't think we would ever want to store this for a course.
2426: # it seems this will only be used if we don't have a course.
2427: #$namespace=$env{'request.course.id'};
2428: #if (!$namespace) {
2429: $namespace=$env{'request.state'};
2430: #}
2431: }
2432: $namespace=~s/\//\_/g;
2433: $namespace=~s/\W//g;
2434: if (!$domain) { $domain=$env{'user.domain'}; }
2435: if (!$stuname) { $stuname=$env{'user.name'}; }
2436: if ($domain eq 'public' && $stuname eq 'public') {
2437: $stuname=$ENV{'REMOTE_ADDR'};
2438: }
2439: my $now=time;
2440: my %hash;
2441: my $path=$perlvar{'lonDaemons'}.'/tmp';
2442: if (tie(%hash,'GDBM_File',
2443: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2444: &GDBM_WRCREAT(),0640)) {
2445: $hash{"version:$symb"}++;
2446: my $version=$hash{"version:$symb"};
2447: my $allkeys='';
2448: foreach my $key (keys(%$storehash)) {
2449: $allkeys.=$key.':';
2450: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2451: }
2452: $hash{"$version:$symb:timestamp"}=$now;
2453: $allkeys.='timestamp';
2454: $hash{"$version:keys:$symb"}=$allkeys;
2455: if (untie(%hash)) {
2456: return 'ok';
2457: } else {
2458: return "error:$!";
2459: }
2460: } else {
2461: return "error:$!";
2462: }
2463: }
2464:
2465: # -----------------------------------------------------------------Temp Restore
2466:
2467: sub tmprestore {
2468: my ($symb,$namespace,$domain,$stuname) = @_;
2469:
2470: if (!$symb) {
2471: $symb=&symbread();
2472: if (!$symb) { $symb= $env{'request.url'}; }
2473: }
2474: $symb=escape($symb);
2475:
2476: if (!$namespace) { $namespace=$env{'request.state'}; }
2477:
2478: if (!$domain) { $domain=$env{'user.domain'}; }
2479: if (!$stuname) { $stuname=$env{'user.name'}; }
2480: if ($domain eq 'public' && $stuname eq 'public') {
2481: $stuname=$ENV{'REMOTE_ADDR'};
2482: }
2483: my %returnhash;
2484: $namespace=~s/\//\_/g;
2485: $namespace=~s/\W//g;
2486: my %hash;
2487: my $path=$perlvar{'lonDaemons'}.'/tmp';
2488: if (tie(%hash,'GDBM_File',
2489: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2490: &GDBM_READER(),0640)) {
2491: my $version=$hash{"version:$symb"};
2492: $returnhash{'version'}=$version;
2493: my $scope;
2494: for ($scope=1;$scope<=$version;$scope++) {
2495: my $vkeys=$hash{"$scope:keys:$symb"};
2496: my @keys=split(/:/,$vkeys);
2497: my $key;
2498: $returnhash{"$scope:keys"}=$vkeys;
2499: foreach $key (@keys) {
2500: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2501: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2502: }
2503: }
2504: if (!(untie(%hash))) {
2505: return "error:$!";
2506: }
2507: } else {
2508: return "error:$!";
2509: }
2510: return %returnhash;
2511: }
2512:
2513: # ----------------------------------------------------------------------- Store
2514:
2515: sub store {
2516: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2517: my $home='';
2518:
2519: if ($stuname) { $home=&homeserver($stuname,$domain); }
2520:
2521: $symb=&symbclean($symb);
2522: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2523:
2524: if (!$domain) { $domain=$env{'user.domain'}; }
2525: if (!$stuname) { $stuname=$env{'user.name'}; }
2526:
2527: &devalidate($symb,$stuname,$domain);
2528:
2529: $symb=escape($symb);
2530: if (!$namespace) {
2531: unless ($namespace=$env{'request.course.id'}) {
2532: return '';
2533: }
2534: }
2535: if (!$home) { $home=$env{'user.home'}; }
2536:
2537: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2538: $$storehash{'host'}=$perlvar{'lonHostID'};
2539:
2540: my $namevalue='';
2541: foreach (keys %$storehash) {
2542: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2543: }
2544: $namevalue=~s/\&$//;
2545: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2546: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2547: }
2548:
2549: # -------------------------------------------------------------- Critical Store
2550:
2551: sub cstore {
2552: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2553: my $home='';
2554:
2555: if ($stuname) { $home=&homeserver($stuname,$domain); }
2556:
2557: $symb=&symbclean($symb);
2558: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2559:
2560: if (!$domain) { $domain=$env{'user.domain'}; }
2561: if (!$stuname) { $stuname=$env{'user.name'}; }
2562:
2563: &devalidate($symb,$stuname,$domain);
2564:
2565: $symb=escape($symb);
2566: if (!$namespace) {
2567: unless ($namespace=$env{'request.course.id'}) {
2568: return '';
2569: }
2570: }
2571: if (!$home) { $home=$env{'user.home'}; }
2572:
2573: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2574: $$storehash{'host'}=$perlvar{'lonHostID'};
2575:
2576: my $namevalue='';
2577: foreach (keys %$storehash) {
2578: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2579: }
2580: $namevalue=~s/\&$//;
2581: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2582: return critical
2583: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2584: }
2585:
2586: # --------------------------------------------------------------------- Restore
2587:
2588: sub restore {
2589: my ($symb,$namespace,$domain,$stuname) = @_;
2590: my $home='';
2591:
2592: if ($stuname) { $home=&homeserver($stuname,$domain); }
2593:
2594: if (!$symb) {
2595: unless ($symb=escape(&symbread())) { return ''; }
2596: } else {
2597: $symb=&escape(&symbclean($symb));
2598: }
2599: if (!$namespace) {
2600: unless ($namespace=$env{'request.course.id'}) {
2601: return '';
2602: }
2603: }
2604: if (!$domain) { $domain=$env{'user.domain'}; }
2605: if (!$stuname) { $stuname=$env{'user.name'}; }
2606: if (!$home) { $home=$env{'user.home'}; }
2607: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2608:
2609: my %returnhash=();
2610: foreach (split(/\&/,$answer)) {
2611: my ($name,$value)=split(/\=/,$_);
2612: $returnhash{&unescape($name)}=&thaw_unescape($value);
2613: }
2614: my $version;
2615: for ($version=1;$version<=$returnhash{'version'};$version++) {
2616: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2617: $returnhash{$_}=$returnhash{$version.':'.$_};
2618: }
2619: }
2620: return %returnhash;
2621: }
2622:
2623: # ---------------------------------------------------------- Course Description
2624:
2625: sub coursedescription {
2626: my ($courseid,$args)=@_;
2627: $courseid=~s/^\///;
2628: $courseid=~s/\_/\//g;
2629: my ($cdomain,$cnum)=split(/\//,$courseid);
2630: my $chome=&homeserver($cnum,$cdomain);
2631: my $normalid=$cdomain.'_'.$cnum;
2632: # need to always cache even if we get errors otherwise we keep
2633: # trying and trying and trying to get the course description.
2634: my %envhash=();
2635: my %returnhash=();
2636:
2637: my $expiretime=600;
2638: if ($env{'request.course.id'} eq $normalid) {
2639: $expiretime=120;
2640: }
2641:
2642: my $prefix='course.'.$cdomain.'_'.$cnum.'.';
2643: if (!$args->{'freshen_cache'}
2644: && ((time-$env{$prefix.'last_cache'}) < $expiretime) ) {
2645: foreach my $key (keys(%env)) {
2646: next if ($key !~ /^\Q$prefix\E(.*)/);
2647: my ($setting) = $1;
2648: $returnhash{$setting} = $env{$key};
2649: }
2650: return %returnhash;
2651: }
2652:
2653: # get the data agin
2654: if (!$args->{'one_time'}) {
2655: $envhash{'course.'.$normalid.'.last_cache'}=time;
2656: }
2657: if ($chome ne 'no_host') {
2658: %returnhash=&dump('environment',$cdomain,$cnum);
2659: if (!exists($returnhash{'con_lost'})) {
2660: $returnhash{'home'}= $chome;
2661: $returnhash{'domain'} = $cdomain;
2662: $returnhash{'num'} = $cnum;
2663: if (!defined($returnhash{'type'})) {
2664: $returnhash{'type'} = 'Course';
2665: }
2666: while (my ($name,$value) = each %returnhash) {
2667: $envhash{'course.'.$normalid.'.'.$name}=$value;
2668: }
2669: $returnhash{'url'}=&clutter($returnhash{'url'});
2670: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2671: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2672: $envhash{'course.'.$normalid.'.home'}=$chome;
2673: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2674: $envhash{'course.'.$normalid.'.num'}=$cnum;
2675: }
2676: }
2677: if (!$args->{'one_time'}) {
2678: &appenv(%envhash);
2679: }
2680: return %returnhash;
2681: }
2682:
2683: # -------------------------------------------------See if a user is privileged
2684:
2685: sub privileged {
2686: my ($username,$domain)=@_;
2687: my $rolesdump=&reply("dump:$domain:$username:roles",
2688: &homeserver($username,$domain));
2689: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2690: my $now=time;
2691: if ($rolesdump ne '') {
2692: foreach (split(/&/,$rolesdump)) {
2693: if ($_!~/^rolesdef_/) {
2694: my ($area,$role)=split(/=/,$_);
2695: $area=~s/\_\w\w$//;
2696: my ($trole,$tend,$tstart)=split(/_/,$role);
2697: if (($trole eq 'dc') || ($trole eq 'su')) {
2698: my $active=1;
2699: if ($tend) {
2700: if ($tend<$now) { $active=0; }
2701: }
2702: if ($tstart) {
2703: if ($tstart>$now) { $active=0; }
2704: }
2705: if ($active) { return 1; }
2706: }
2707: }
2708: }
2709: }
2710: return 0;
2711: }
2712:
2713: # -------------------------------------------------------- Get user privileges
2714:
2715: sub rolesinit {
2716: my ($domain,$username,$authhost)=@_;
2717: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2718: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2719: my %allroles=();
2720: my %allgroups=();
2721: my $now=time;
2722: my %userroles = ('user.login.time' => $now);
2723: my $group_privs;
2724:
2725: if ($rolesdump ne '') {
2726: foreach (split(/&/,$rolesdump)) {
2727: if ($_!~/^rolesdef_/) {
2728: my ($area,$role)=split(/=/,$_);
2729: $area=~s/\_\w\w$//;
2730: my ($trole,$tend,$tstart,$group_privs);
2731: if ($role=~/^cr/) {
2732: if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
2733: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2734: ($tend,$tstart)=split('_',$trest);
2735: } else {
2736: $trole=$role;
2737: }
2738: } elsif ($role =~ m|^gr/|) {
2739: ($trole,$tend,$tstart) = split(/_/,$role);
2740: ($trole,$group_privs) = split(/\//,$trole);
2741: $group_privs = &unescape($group_privs);
2742: } else {
2743: ($trole,$tend,$tstart)=split(/_/,$role);
2744: }
2745: my %new_role = &set_arearole($trole,$area,$tstart,$tend,$domain,
2746: $username);
2747: @userroles{keys(%new_role)} = @new_role{keys(%new_role)};
2748: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2749: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2750: if (($area ne '') && ($trole ne '')) {
2751: my $spec=$trole.'.'.$area;
2752: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2753: if ($trole =~ /^cr\//) {
2754: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2755: } elsif ($trole eq 'gr') {
2756: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2757: } else {
2758: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2759: }
2760: }
2761: }
2762: }
2763: my ($author,$adv) = &set_userprivs(\%userroles,\%allroles,\%allgroups);
2764: $userroles{'user.adv'} = $adv;
2765: $userroles{'user.author'} = $author;
2766: $env{'user.adv'}=$adv;
2767: }
2768: return \%userroles;
2769: }
2770:
2771: sub set_arearole {
2772: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2773: # log the associated role with the area
2774: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2775: return ('user.role.'.$trole.'.'.$area => $tstart.'.'.$tend);
2776: }
2777:
2778: sub custom_roleprivs {
2779: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2780: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2781: my $homsvr=homeserver($rauthor,$rdomain);
2782: if ($hostname{$homsvr} ne '') {
2783: my ($rdummy,$roledef)=
2784: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2785: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2786: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2787: if (defined($syspriv)) {
2788: $$allroles{'cm./'}.=':'.$syspriv;
2789: $$allroles{$spec.'./'}.=':'.$syspriv;
2790: }
2791: if ($tdomain ne '') {
2792: if (defined($dompriv)) {
2793: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2794: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2795: }
2796: if (($trest ne '') && (defined($coursepriv))) {
2797: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2798: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2799: }
2800: }
2801: }
2802: }
2803: }
2804:
2805: sub group_roleprivs {
2806: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2807: my $access = 1;
2808: my $now = time;
2809: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2810: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2811: if ($access) {
2812: my ($course,$group) = ($area =~ m|(/\w+/\w+)/([^/]+)$|);
2813: $$allgroups{$course}{$group} .=':'.$group_privs;
2814: }
2815: }
2816:
2817: sub standard_roleprivs {
2818: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2819: if (defined($pr{$trole.':s'})) {
2820: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2821: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2822: }
2823: if ($tdomain ne '') {
2824: if (defined($pr{$trole.':d'})) {
2825: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2826: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2827: }
2828: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2829: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2830: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2831: }
2832: }
2833: }
2834:
2835: sub set_userprivs {
2836: my ($userroles,$allroles,$allgroups) = @_;
2837: my $author=0;
2838: my $adv=0;
2839: my %grouproles = ();
2840: if (keys(%{$allgroups}) > 0) {
2841: foreach my $role (keys %{$allroles}) {
2842: my ($trole,$area,$sec,$extendedarea);
2843: if ($role =~ m-^(\w+|cr/\w+/\w+/\w+)\.(/\w+/\w+)(/?\w*)-) {
2844: $trole = $1;
2845: $area = $2;
2846: $sec = $3;
2847: $extendedarea = $area.$sec;
2848: if (exists($$allgroups{$area})) {
2849: foreach my $group (keys(%{$$allgroups{$area}})) {
2850: my $spec = $trole.'.'.$extendedarea;
2851: $grouproles{$spec.'.'.$area.'/'.$group} =
2852: $$allgroups{$area}{$group};
2853: }
2854: }
2855: }
2856: }
2857: }
2858: foreach (keys(%grouproles)) {
2859: $$allroles{$_} = $grouproles{$_};
2860: }
2861: foreach (keys %{$allroles}) {
2862: my %thesepriv=();
2863: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2864: foreach (split(/:/,$$allroles{$_})) {
2865: if ($_ ne '') {
2866: my ($privilege,$restrictions)=split(/&/,$_);
2867: if ($restrictions eq '') {
2868: $thesepriv{$privilege}='F';
2869: } elsif ($thesepriv{$privilege} ne 'F') {
2870: $thesepriv{$privilege}.=$restrictions;
2871: }
2872: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2873: }
2874: }
2875: my $thesestr='';
2876: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2877: $userroles->{'user.priv.'.$_} = $thesestr;
2878: }
2879: return ($author,$adv);
2880: }
2881:
2882: # --------------------------------------------------------------- get interface
2883:
2884: sub get {
2885: my ($namespace,$storearr,$udomain,$uname)=@_;
2886: my $items='';
2887: foreach (@$storearr) {
2888: $items.=escape($_).'&';
2889: }
2890: $items=~s/\&$//;
2891: if (!$udomain) { $udomain=$env{'user.domain'}; }
2892: if (!$uname) { $uname=$env{'user.name'}; }
2893: my $uhome=&homeserver($uname,$udomain);
2894:
2895: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2896: my @pairs=split(/\&/,$rep);
2897: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2898: return @pairs;
2899: }
2900: my %returnhash=();
2901: my $i=0;
2902: foreach (@$storearr) {
2903: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2904: $i++;
2905: }
2906: return %returnhash;
2907: }
2908:
2909: # --------------------------------------------------------------- del interface
2910:
2911: sub del {
2912: my ($namespace,$storearr,$udomain,$uname)=@_;
2913: my $items='';
2914: foreach (@$storearr) {
2915: $items.=escape($_).'&';
2916: }
2917: $items=~s/\&$//;
2918: if (!$udomain) { $udomain=$env{'user.domain'}; }
2919: if (!$uname) { $uname=$env{'user.name'}; }
2920: my $uhome=&homeserver($uname,$udomain);
2921:
2922: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2923: }
2924:
2925: # -------------------------------------------------------------- dump interface
2926:
2927: sub dump {
2928: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2929: if (!$udomain) { $udomain=$env{'user.domain'}; }
2930: if (!$uname) { $uname=$env{'user.name'}; }
2931: my $uhome=&homeserver($uname,$udomain);
2932: if ($regexp) {
2933: $regexp=&escape($regexp);
2934: } else {
2935: $regexp='.';
2936: }
2937: my $rep=&reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
2938: my @pairs=split(/\&/,$rep);
2939: my %returnhash=();
2940: foreach my $item (@pairs) {
2941: my ($key,$value)=split(/=/,$item,2);
2942: $key = &unescape($key);
2943: next if ($key =~ /^error: 2 /);
2944: $returnhash{$key}=&thaw_unescape($value);
2945: }
2946: return %returnhash;
2947: }
2948:
2949: # --------------------------------------------------------- dumpstore interface
2950:
2951: sub dumpstore {
2952: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2953: return &dump($namespace,$udomain,$uname,$regexp,$range);
2954: }
2955:
2956: # -------------------------------------------------------------- keys interface
2957:
2958: sub getkeys {
2959: my ($namespace,$udomain,$uname)=@_;
2960: if (!$udomain) { $udomain=$env{'user.domain'}; }
2961: if (!$uname) { $uname=$env{'user.name'}; }
2962: my $uhome=&homeserver($uname,$udomain);
2963: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2964: my @keyarray=();
2965: foreach (split(/\&/,$rep)) {
2966: push (@keyarray,&unescape($_));
2967: }
2968: return @keyarray;
2969: }
2970:
2971: # --------------------------------------------------------------- currentdump
2972: sub currentdump {
2973: my ($courseid,$sdom,$sname)=@_;
2974: $courseid = $env{'request.course.id'} if (! defined($courseid));
2975: $sdom = $env{'user.domain'} if (! defined($sdom));
2976: $sname = $env{'user.name'} if (! defined($sname));
2977: my $uhome = &homeserver($sname,$sdom);
2978: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2979: return if ($rep =~ /^(error:|no_such_host)/);
2980: #
2981: my %returnhash=();
2982: #
2983: if ($rep eq "unknown_cmd") {
2984: # an old lond will not know currentdump
2985: # Do a dump and make it look like a currentdump
2986: my @tmp = &dump($courseid,$sdom,$sname,'.');
2987: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2988: my %hash = @tmp;
2989: @tmp=();
2990: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2991: } else {
2992: my @pairs=split(/\&/,$rep);
2993: foreach (@pairs) {
2994: my ($key,$value)=split(/=/,$_);
2995: my ($symb,$param) = split(/:/,$key);
2996: $returnhash{&unescape($symb)}->{&unescape($param)} =
2997: &thaw_unescape($value);
2998: }
2999: }
3000: return %returnhash;
3001: }
3002:
3003: sub convert_dump_to_currentdump{
3004: my %hash = %{shift()};
3005: my %returnhash;
3006: # Code ripped from lond, essentially. The only difference
3007: # here is the unescaping done by lonnet::dump(). Conceivably
3008: # we might run in to problems with parameter names =~ /^v\./
3009: while (my ($key,$value) = each(%hash)) {
3010: my ($v,$symb,$param) = split(/:/,$key);
3011: next if ($v eq 'version' || $symb eq 'keys');
3012: next if (exists($returnhash{$symb}) &&
3013: exists($returnhash{$symb}->{$param}) &&
3014: $returnhash{$symb}->{'v.'.$param} > $v);
3015: $returnhash{$symb}->{$param}=$value;
3016: $returnhash{$symb}->{'v.'.$param}=$v;
3017: }
3018: #
3019: # Remove all of the keys in the hashes which keep track of
3020: # the version of the parameter.
3021: while (my ($symb,$param_hash) = each(%returnhash)) {
3022: # use a foreach because we are going to delete from the hash.
3023: foreach my $key (keys(%$param_hash)) {
3024: delete($param_hash->{$key}) if ($key =~ /^v\./);
3025: }
3026: }
3027: return \%returnhash;
3028: }
3029:
3030: # ------------------------------------------------------ critical inc interface
3031:
3032: sub cinc {
3033: return &inc(@_,'critical');
3034: }
3035:
3036: # --------------------------------------------------------------- inc interface
3037:
3038: sub inc {
3039: my ($namespace,$store,$udomain,$uname,$critical) = @_;
3040: if (!$udomain) { $udomain=$env{'user.domain'}; }
3041: if (!$uname) { $uname=$env{'user.name'}; }
3042: my $uhome=&homeserver($uname,$udomain);
3043: my $items='';
3044: if (! ref($store)) {
3045: # got a single value, so use that instead
3046: $items = &escape($store).'=&';
3047: } elsif (ref($store) eq 'SCALAR') {
3048: $items = &escape($$store).'=&';
3049: } elsif (ref($store) eq 'ARRAY') {
3050: $items = join('=&',map {&escape($_);} @{$store});
3051: } elsif (ref($store) eq 'HASH') {
3052: while (my($key,$value) = each(%{$store})) {
3053: $items.= &escape($key).'='.&escape($value).'&';
3054: }
3055: }
3056: $items=~s/\&$//;
3057: if ($critical) {
3058: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
3059: } else {
3060: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
3061: }
3062: }
3063:
3064: # --------------------------------------------------------------- put interface
3065:
3066: sub put {
3067: my ($namespace,$storehash,$udomain,$uname)=@_;
3068: if (!$udomain) { $udomain=$env{'user.domain'}; }
3069: if (!$uname) { $uname=$env{'user.name'}; }
3070: my $uhome=&homeserver($uname,$udomain);
3071: my $items='';
3072: foreach (keys %$storehash) {
3073: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3074: }
3075: $items=~s/\&$//;
3076: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3077: }
3078:
3079: # ------------------------------------------------------------ newput interface
3080:
3081: sub newput {
3082: my ($namespace,$storehash,$udomain,$uname)=@_;
3083: if (!$udomain) { $udomain=$env{'user.domain'}; }
3084: if (!$uname) { $uname=$env{'user.name'}; }
3085: my $uhome=&homeserver($uname,$udomain);
3086: my $items='';
3087: foreach my $key (keys(%$storehash)) {
3088: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3089: }
3090: $items=~s/\&$//;
3091: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3092: }
3093:
3094: # --------------------------------------------------------- putstore interface
3095:
3096: sub putstore {
3097: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3098: if (!$udomain) { $udomain=$env{'user.domain'}; }
3099: if (!$uname) { $uname=$env{'user.name'}; }
3100: my $uhome=&homeserver($uname,$udomain);
3101: my $items='';
3102: foreach my $key (keys(%$storehash)) {
3103: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3104: }
3105: $items=~s/\&$//;
3106: my $esc_symb=&escape($symb);
3107: my $esc_v=&escape($version);
3108: my $reply =
3109: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3110: $uhome);
3111: if ($reply eq 'unknown_cmd') {
3112: # gfall back to way things use to be done
3113: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3114: $uname);
3115: }
3116: return $reply;
3117: }
3118:
3119: sub old_putstore {
3120: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3121: if (!$udomain) { $udomain=$env{'user.domain'}; }
3122: if (!$uname) { $uname=$env{'user.name'}; }
3123: my $uhome=&homeserver($uname,$udomain);
3124: my %newstorehash;
3125: foreach (keys %$storehash) {
3126: my $key = $version.':'.&escape($symb).':'.$_;
3127: $newstorehash{$key} = $storehash->{$_};
3128: }
3129: my $items='';
3130: my %allitems = ();
3131: foreach (keys %newstorehash) {
3132: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3133: my $key = $1.':keys:'.$2;
3134: $allitems{$key} .= $3.':';
3135: }
3136: $items.=$_.'='.&freeze_escape($newstorehash{$_}).'&';
3137: }
3138: foreach (keys %allitems) {
3139: $allitems{$_} =~ s/\:$//;
3140: $items.= $_.'='.$allitems{$_}.'&';
3141: }
3142: $items=~s/\&$//;
3143: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3144: }
3145:
3146: # ------------------------------------------------------ critical put interface
3147:
3148: sub cput {
3149: my ($namespace,$storehash,$udomain,$uname)=@_;
3150: if (!$udomain) { $udomain=$env{'user.domain'}; }
3151: if (!$uname) { $uname=$env{'user.name'}; }
3152: my $uhome=&homeserver($uname,$udomain);
3153: my $items='';
3154: foreach (keys %$storehash) {
3155: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3156: }
3157: $items=~s/\&$//;
3158: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3159: }
3160:
3161: # -------------------------------------------------------------- eget interface
3162:
3163: sub eget {
3164: my ($namespace,$storearr,$udomain,$uname)=@_;
3165: my $items='';
3166: foreach (@$storearr) {
3167: $items.=escape($_).'&';
3168: }
3169: $items=~s/\&$//;
3170: if (!$udomain) { $udomain=$env{'user.domain'}; }
3171: if (!$uname) { $uname=$env{'user.name'}; }
3172: my $uhome=&homeserver($uname,$udomain);
3173: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3174: my @pairs=split(/\&/,$rep);
3175: my %returnhash=();
3176: my $i=0;
3177: foreach (@$storearr) {
3178: $returnhash{$_}=&thaw_unescape($pairs[$i]);
3179: $i++;
3180: }
3181: return %returnhash;
3182: }
3183:
3184: # ------------------------------------------------------------ tmpput interface
3185: sub tmpput {
3186: my ($storehash,$server)=@_;
3187: my $items='';
3188: foreach (keys(%$storehash)) {
3189: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3190: }
3191: $items=~s/\&$//;
3192: return &reply("tmpput:$items",$server);
3193: }
3194:
3195: # ------------------------------------------------------------ tmpget interface
3196: sub tmpget {
3197: my ($token,$server)=@_;
3198: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3199: my $rep=&reply("tmpget:$token",$server);
3200: my %returnhash;
3201: foreach my $item (split(/\&/,$rep)) {
3202: my ($key,$value)=split(/=/,$item);
3203: $returnhash{&unescape($key)}=&thaw_unescape($value);
3204: }
3205: return %returnhash;
3206: }
3207:
3208: # ------------------------------------------------------------ tmpget interface
3209: sub tmpdel {
3210: my ($token,$server)=@_;
3211: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3212: return &reply("tmpdel:$token",$server);
3213: }
3214:
3215: # -------------------------------------------------- portfolio access checking
3216:
3217: sub portfolio_access {
3218: my ($requrl) = @_;
3219: my (undef,$udom,$unum,$file_name,$group) = &parse_portfolio_url($requrl);
3220: my $result = &get_portfolio_access($udom,$unum,$file_name,$group);
3221: if ($result eq 'ok') {
3222: return 'F';
3223: } elsif ($result =~ /^[^:]+:guest_/) {
3224: return 'A';
3225: }
3226: return '';
3227: }
3228:
3229: sub get_portfolio_access {
3230: my ($udom,$unum,$file_name,$group,$access_hash) = @_;
3231:
3232: if (!ref($access_hash)) {
3233: my $current_perms = &get_portfile_permissions($udom,$unum);
3234: my %access_controls = &get_access_controls($current_perms,$group,
3235: $file_name);
3236: $access_hash = $access_controls{$file_name};
3237: }
3238:
3239: my ($public,$guest,@domains,@users,@courses,@groups);
3240: my $now = time;
3241: if (ref($access_hash) eq 'HASH') {
3242: foreach my $key (keys(%{$access_hash})) {
3243: my ($num,$scope,$end,$start) = ($key =~ /^([^:]+):([a-z]+)_(\d*)_?(\d*)$/);
3244: if ($start > $now) {
3245: next;
3246: }
3247: if ($end && $end<$now) {
3248: next;
3249: }
3250: if ($scope eq 'public') {
3251: $public = $key;
3252: last;
3253: } elsif ($scope eq 'guest') {
3254: $guest = $key;
3255: } elsif ($scope eq 'domains') {
3256: push(@domains,$key);
3257: } elsif ($scope eq 'users') {
3258: push(@users,$key);
3259: } elsif ($scope eq 'course') {
3260: push(@courses,$key);
3261: } elsif ($scope eq 'group') {
3262: push(@groups,$key);
3263: }
3264: }
3265: if ($public) {
3266: return 'ok';
3267: }
3268: if ($env{'user.name'} eq 'public' && $env{'user.domain'} eq 'public') {
3269: if ($guest) {
3270: return $guest;
3271: }
3272: } else {
3273: if (@domains > 0) {
3274: foreach my $domkey (@domains) {
3275: if (ref($access_hash->{$domkey}{'dom'}) eq 'ARRAY') {
3276: if (grep(/^\Q$env{'user.domain'}\E$/,@{$access_hash->{$domkey}{'dom'}})) {
3277: return 'ok';
3278: }
3279: }
3280: }
3281: }
3282: if (@users > 0) {
3283: foreach my $userkey (@users) {
3284: if (exists($access_hash->{$userkey}{'users'}{$env{'user.name'}.':'.$env{'user.domain'}})) {
3285: return 'ok';
3286: }
3287: }
3288: }
3289: my %roleshash;
3290: my @courses_and_groups = @courses;
3291: push(@courses_and_groups,@groups);
3292: if (@courses_and_groups > 0) {
3293: my (%allgroups,%allroles);
3294: my ($start,$end,$role,$sec,$group);
3295: foreach my $envkey (%env) {
3296: if ($envkey =~ m-^user\.role\.(gr|cc|in|ta|ep|st)\./([^/]+)/([^/]+)/?([^/]*)$-) {
3297: my $cid = $2.'_'.$3;
3298: if ($1 eq 'gr') {
3299: $group = $4;
3300: $allgroups{$cid}{$group} = $env{$envkey};
3301: } else {
3302: if ($4 eq '') {
3303: $sec = 'none';
3304: } else {
3305: $sec = $4;
3306: }
3307: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3308: }
3309: } elsif ($envkey =~ m-^user\.role\./cr/(\w+/\w+/\w*)./([^/]+)/([^/]+)/?([^/]*)$-) {
3310: my $cid = $2.'_'.$3;
3311: if ($4 eq '') {
3312: $sec = 'none';
3313: } else {
3314: $sec = $4;
3315: }
3316: $allroles{$cid}{$1}{$sec} = $env{$envkey};
3317: }
3318: }
3319: if (keys(%allroles) == 0) {
3320: return;
3321: }
3322: foreach my $key (@courses_and_groups) {
3323: my %content = %{$$access_hash{$key}};
3324: my $cnum = $content{'number'};
3325: my $cdom = $content{'domain'};
3326: my $cid = $cdom.'_'.$cnum;
3327: if (!exists($allroles{$cid})) {
3328: next;
3329: }
3330: foreach my $role_id (keys(%{$content{'roles'}})) {
3331: my @sections = @{$content{'roles'}{$role_id}{'section'}};
3332: my @groups = @{$content{'roles'}{$role_id}{'group'}};
3333: my @status = @{$content{'roles'}{$role_id}{'access'}};
3334: my @roles = @{$content{'roles'}{$role_id}{'role'}};
3335: foreach my $role (keys(%{$allroles{$cid}})) {
3336: if ((grep/^all$/,@roles) || (grep/^\Q$role\E$/,@roles)) {
3337: foreach my $sec (keys(%{$allroles{$cid}{$role}})) {
3338: if (&course_group_datechecker($allroles{$cid}{$role}{$sec},$now,\@status) eq 'ok') {
3339: if (grep/^all$/,@sections) {
3340: return 'ok';
3341: } else {
3342: if (grep/^$sec$/,@sections) {
3343: return 'ok';
3344: }
3345: }
3346: }
3347: }
3348: if (keys(%{$allgroups{$cid}}) == 0) {
3349: if (grep/^none$/,@groups) {
3350: return 'ok';
3351: }
3352: } else {
3353: if (grep/^all$/,@groups) {
3354: return 'ok';
3355: }
3356: foreach my $group (keys(%{$allgroups{$cid}})) {
3357: if (grep/^$group$/,@groups) {
3358: return 'ok';
3359: }
3360: }
3361: }
3362: }
3363: }
3364: }
3365: }
3366: }
3367: if ($guest) {
3368: return $guest;
3369: }
3370: }
3371: }
3372: return;
3373: }
3374:
3375: sub course_group_datechecker {
3376: my ($dates,$now,$status) = @_;
3377: my ($start,$end) = split(/\./,$dates);
3378: if (!$start && !$end) {
3379: return 'ok';
3380: }
3381: if (grep/^active$/,@{$status}) {
3382: if (((!$start) || ($start && $start <= $now)) && ((!$end) || ($end && $end >= $now))) {
3383: return 'ok';
3384: }
3385: }
3386: if (grep/^previous$/,@{$status}) {
3387: if ($end > $now ) {
3388: return 'ok';
3389: }
3390: }
3391: if (grep/^future$/,@{$status}) {
3392: if ($start > $now) {
3393: return 'ok';
3394: }
3395: }
3396: return;
3397: }
3398:
3399: sub parse_portfolio_url {
3400: my ($url) = @_;
3401:
3402: my ($type,$udom,$unum,$group,$file_name);
3403:
3404: if ($url =~ m-^/*uploaded/([^/]+)/([^/]+)/portfolio(/.+)$-) {
3405: $type = 1;
3406: $udom = $1;
3407: $unum = $2;
3408: $file_name = $3;
3409: } elsif ($url =~ m-^/*uploaded/([^/]+)/([^/]+)/groups/([^/]+)/portfolio/(.+)$-) {
3410: $type = 2;
3411: $udom = $1;
3412: $unum = $2;
3413: $group = $3;
3414: $file_name = $3.'/'.$4;
3415: }
3416: if (wantarray) {
3417: return ($type,$udom,$unum,$file_name,$group);
3418: }
3419: return $type;
3420: }
3421:
3422: sub is_portfolio_url {
3423: my ($url) = @_;
3424: return scalar(&parse_portfolio_url($url));
3425: }
3426:
3427: # ---------------------------------------------- Custom access rule evaluation
3428:
3429: sub customaccess {
3430: my ($priv,$uri)=@_;
3431: my ($urole,$urealm)=split(/\./,$env{'request.role'});
3432: $urealm=~s/^\W//;
3433: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
3434: my $access=0;
3435: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3436: my ($effect,$realm,$role)=split(/\:/,$_);
3437: if ($role) {
3438: if ($role ne $urole) { next; }
3439: }
3440: foreach (split(/\s*\,\s*/,$realm)) {
3441: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
3442: if ($tdom) {
3443: if ($tdom ne $udom) { next; }
3444: }
3445: if ($tcrs) {
3446: if ($tcrs ne $ucrs) { next; }
3447: }
3448: if ($tsec) {
3449: if ($tsec ne $usec) { next; }
3450: }
3451: $access=($effect eq 'allow');
3452: last;
3453: }
3454: if ($realm eq '' && $role eq '') {
3455: $access=($effect eq 'allow');
3456: }
3457: }
3458: return $access;
3459: }
3460:
3461: # ------------------------------------------------- Check for a user privilege
3462:
3463: sub allowed {
3464: my ($priv,$uri,$symb)=@_;
3465: my $ver_orguri=$uri;
3466: $uri=&deversion($uri);
3467: my $orguri=$uri;
3468: $uri=&declutter($uri);
3469:
3470: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3471: # Free bre access to adm and meta resources
3472: if (((($uri=~/^adm\//) && ($uri !~ m{/(?:smppg|bulletinboard)$}))
3473: || (($uri=~/\.meta$/) && ($uri!~m|^uploaded/|) ))
3474: && ($priv eq 'bre')) {
3475: return 'F';
3476: }
3477:
3478: # Free bre access to user's own portfolio contents
3479: my ($space,$domain,$name,@dir)=split('/',$uri);
3480: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3481: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
3482: return 'F';
3483: }
3484:
3485: # bre access to group portfolio for rgf priv in group, or mdg or vcg in course.
3486: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
3487: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
3488: if (exists($env{'request.course.id'})) {
3489: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
3490: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
3491: if (($domain eq $cdom) && ($name eq $cnum)) {
3492: my $courseprivid=$env{'request.course.id'};
3493: $courseprivid=~s/\_/\//;
3494: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
3495: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
3496: return $1;
3497: } else {
3498: if ($env{'request.course.sec'}) {
3499: $courseprivid.='/'.$env{'request.course.sec'};
3500: }
3501: if ($env{'user.priv.'.$env{'request.role'}.'./'.
3502: $courseprivid} =~/(mdg|vcg)\&([^\:]*)/) {
3503: return $2;
3504: }
3505: }
3506: }
3507: }
3508: }
3509:
3510: # Free bre to public access
3511:
3512: if ($priv eq 'bre') {
3513: my $copyright=&metadata($uri,'copyright');
3514: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3515: return 'F';
3516: }
3517: if ($copyright eq 'priv') {
3518: $uri=~/([^\/]+)\/([^\/]+)\//;
3519: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3520: return '';
3521: }
3522: }
3523: if ($copyright eq 'domain') {
3524: $uri=~/([^\/]+)\/([^\/]+)\//;
3525: unless (($env{'user.domain'} eq $1) ||
3526: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3527: return '';
3528: }
3529: }
3530: if ($env{'request.role'}=~ /li\.\//) {
3531: # Library role, so allow browsing of resources in this domain.
3532: return 'F';
3533: }
3534: if ($copyright eq 'custom') {
3535: unless (&customaccess($priv,$uri)) { return ''; }
3536: }
3537: }
3538: # Domain coordinator is trying to create a course
3539: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3540: # uri is the requested domain in this case.
3541: # comparison to 'request.role.domain' shows if the user has selected
3542: # a role of dc for the domain in question.
3543: return 'F' if ($uri eq $env{'request.role.domain'});
3544: }
3545:
3546: my $thisallowed='';
3547: my $statecond=0;
3548: my $courseprivid='';
3549:
3550: # Course
3551:
3552: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3553: $thisallowed.=$1;
3554: }
3555:
3556: # Domain
3557:
3558: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3559: =~/\Q$priv\E\&([^\:]*)/) {
3560: $thisallowed.=$1;
3561: }
3562:
3563: # Course: uri itself is a course
3564: my $courseuri=$uri;
3565: $courseuri=~s/\_(\d)/\/$1/;
3566: $courseuri=~s/^([^\/])/\/$1/;
3567:
3568: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3569: =~/\Q$priv\E\&([^\:]*)/) {
3570: $thisallowed.=$1;
3571: }
3572:
3573: # URI is an uploaded document for this course, default permissions don't matter
3574: # not allowing 'edit' access (editupload) to uploaded course docs
3575: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3576: $thisallowed='';
3577: my ($match)=&is_on_map($uri);
3578: if ($match) {
3579: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3580: =~/\Q$priv\E\&([^\:]*)/) {
3581: $thisallowed.=$1;
3582: }
3583: } else {
3584: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
3585: if ($refuri) {
3586: if ($refuri =~ m|^/adm/|) {
3587: $thisallowed='F';
3588: } else {
3589: $refuri=&declutter($refuri);
3590: my ($match) = &is_on_map($refuri);
3591: if ($match) {
3592: $thisallowed='F';
3593: }
3594: }
3595: }
3596: }
3597: }
3598:
3599: if ($priv eq 'bre'
3600: && $thisallowed ne 'F'
3601: && $thisallowed ne '2'
3602: && &is_portfolio_url($uri)) {
3603: $thisallowed = &portfolio_access($uri);
3604: }
3605:
3606: # Full access at system, domain or course-wide level? Exit.
3607:
3608: if ($thisallowed=~/F/) {
3609: return 'F';
3610: }
3611:
3612: # If this is generating or modifying users, exit with special codes
3613:
3614: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3615: if (($priv eq 'cca') || ($priv eq 'caa')) {
3616: my ($audom,$auname)=split('/',$uri);
3617: # no author name given, so this just checks on the general right to make a co-author in this domain
3618: unless ($auname) { return $thisallowed; }
3619: # an author name is given, so we are about to actually make a co-author for a certain account
3620: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3621: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3622: ($audom ne $env{'request.role.domain'}))) { return ''; }
3623: }
3624: return $thisallowed;
3625: }
3626: #
3627: # Gathered so far: system, domain and course wide privileges
3628: #
3629: # Course: See if uri or referer is an individual resource that is part of
3630: # the course
3631:
3632: if ($env{'request.course.id'}) {
3633:
3634: $courseprivid=$env{'request.course.id'};
3635: if ($env{'request.course.sec'}) {
3636: $courseprivid.='/'.$env{'request.course.sec'};
3637: }
3638: $courseprivid=~s/\_/\//;
3639: my $checkreferer=1;
3640: my ($match,$cond)=&is_on_map($uri);
3641: if ($match) {
3642: $statecond=$cond;
3643: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3644: =~/\Q$priv\E\&([^\:]*)/) {
3645: $thisallowed.=$1;
3646: $checkreferer=0;
3647: }
3648: }
3649:
3650: if ($checkreferer) {
3651: my $refuri=$env{'httpref.'.$orguri};
3652: unless ($refuri) {
3653: foreach (keys %env) {
3654: if ($_=~/^httpref\..*\*/) {
3655: my $pattern=$_;
3656: $pattern=~s/^httpref\.\/res\///;
3657: $pattern=~s/\*/\[\^\/\]\+/g;
3658: $pattern=~s/\//\\\//g;
3659: if ($orguri=~/$pattern/) {
3660: $refuri=$env{$_};
3661: }
3662: }
3663: }
3664: }
3665:
3666: if ($refuri) {
3667: $refuri=&declutter($refuri);
3668: my ($match,$cond)=&is_on_map($refuri);
3669: if ($match) {
3670: my $refstatecond=$cond;
3671: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3672: =~/\Q$priv\E\&([^\:]*)/) {
3673: $thisallowed.=$1;
3674: $uri=$refuri;
3675: $statecond=$refstatecond;
3676: }
3677: }
3678: }
3679: }
3680: }
3681:
3682: #
3683: # Gathered now: all privileges that could apply, and condition number
3684: #
3685: #
3686: # Full or no access?
3687: #
3688:
3689: if ($thisallowed=~/F/) {
3690: return 'F';
3691: }
3692:
3693: unless ($thisallowed) {
3694: return '';
3695: }
3696:
3697: # Restrictions exist, deal with them
3698: #
3699: # C:according to course preferences
3700: # R:according to resource settings
3701: # L:unless locked
3702: # X:according to user session state
3703: #
3704:
3705: # Possibly locked functionality, check all courses
3706: # Locks might take effect only after 10 minutes cache expiration for other
3707: # courses, and 2 minutes for current course
3708:
3709: my $envkey;
3710: if ($thisallowed=~/L/) {
3711: foreach $envkey (keys %env) {
3712: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3713: my $courseid=$2;
3714: my $roleid=$1.'.'.$2;
3715: $courseid=~s/^\///;
3716: my $expiretime=600;
3717: if ($env{'request.role'} eq $roleid) {
3718: $expiretime=120;
3719: }
3720: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3721: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3722: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3723: &coursedescription($courseid,{'freshen_cache' => 1});
3724: }
3725: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3726: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3727: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3728: &log($env{'user.domain'},$env{'user.name'},
3729: $env{'user.home'},
3730: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3731: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3732: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3733: return '';
3734: }
3735: }
3736: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3737: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3738: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3739: &log($env{'user.domain'},$env{'user.name'},
3740: $env{'user.home'},
3741: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3742: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3743: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3744: return '';
3745: }
3746: }
3747: }
3748: }
3749: }
3750:
3751: #
3752: # Rest of the restrictions depend on selected course
3753: #
3754:
3755: unless ($env{'request.course.id'}) {
3756: if ($thisallowed eq 'A') {
3757: return 'A';
3758: } else {
3759: return '1';
3760: }
3761: }
3762:
3763: #
3764: # Now user is definitely in a course
3765: #
3766:
3767:
3768: # Course preferences
3769:
3770: if ($thisallowed=~/C/) {
3771: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3772: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
3773: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
3774: =~/\Q$rolecode\E/) {
3775: if ($priv ne 'pch') {
3776: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3777: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3778: $env{'request.course.id'});
3779: }
3780: return '';
3781: }
3782:
3783: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
3784: =~/\Q$unamedom\E/) {
3785: if ($priv ne 'pch') {
3786: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
3787: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3788: $env{'request.course.id'});
3789: }
3790: return '';
3791: }
3792: }
3793:
3794: # Resource preferences
3795:
3796: if ($thisallowed=~/R/) {
3797: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3798: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3799: if ($priv ne 'pch') {
3800: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3801: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3802: }
3803: return '';
3804: }
3805: }
3806:
3807: # Restricted by state or randomout?
3808:
3809: if ($thisallowed=~/X/) {
3810: if ($env{'acc.randomout'}) {
3811: if (!$symb) { $symb=&symbread($uri,1); }
3812: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3813: return '';
3814: }
3815: }
3816: if (&condval($statecond)) {
3817: return '2';
3818: } else {
3819: return '';
3820: }
3821: }
3822:
3823: if ($thisallowed eq 'A') {
3824: return 'A';
3825: }
3826: return 'F';
3827: }
3828:
3829: sub split_uri_for_cond {
3830: my $uri=&deversion(&declutter(shift));
3831: my @uriparts=split(/\//,$uri);
3832: my $filename=pop(@uriparts);
3833: my $pathname=join('/',@uriparts);
3834: return ($pathname,$filename);
3835: }
3836: # --------------------------------------------------- Is a resource on the map?
3837:
3838: sub is_on_map {
3839: my ($pathname,$filename) = &split_uri_for_cond(shift);
3840: #Trying to find the conditional for the file
3841: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3842: /\&\Q$filename\E\:([\d\|]+)\&/);
3843: if ($match) {
3844: return (1,$1);
3845: } else {
3846: return (0,0);
3847: }
3848: }
3849:
3850: # --------------------------------------------------------- Get symb from alias
3851:
3852: sub get_symb_from_alias {
3853: my $symb=shift;
3854: my ($map,$resid,$url)=&decode_symb($symb);
3855: # Already is a symb
3856: if ($url) { return $symb; }
3857: # Must be an alias
3858: my $aliassymb='';
3859: my %bighash;
3860: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3861: &GDBM_READER(),0640)) {
3862: my $rid=$bighash{'mapalias_'.$symb};
3863: if ($rid) {
3864: my ($mapid,$resid)=split(/\./,$rid);
3865: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3866: $resid,$bighash{'src_'.$rid});
3867: }
3868: untie %bighash;
3869: }
3870: return $aliassymb;
3871: }
3872:
3873: # ----------------------------------------------------------------- Define Role
3874:
3875: sub definerole {
3876: if (allowed('mcr','/')) {
3877: my ($rolename,$sysrole,$domrole,$courole)=@_;
3878: foreach (split(':',$sysrole)) {
3879: my ($crole,$cqual)=split(/\&/,$_);
3880: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3881: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3882: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3883: return "refused:s:$crole&$cqual";
3884: }
3885: }
3886: }
3887: foreach (split(':',$domrole)) {
3888: my ($crole,$cqual)=split(/\&/,$_);
3889: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3890: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3891: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3892: return "refused:d:$crole&$cqual";
3893: }
3894: }
3895: }
3896: foreach (split(':',$courole)) {
3897: my ($crole,$cqual)=split(/\&/,$_);
3898: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3899: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3900: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3901: return "refused:c:$crole&$cqual";
3902: }
3903: }
3904: }
3905: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3906: "$env{'user.domain'}:$env{'user.name'}:".
3907: "rolesdef_$rolename=".
3908: escape($sysrole.'_'.$domrole.'_'.$courole);
3909: return reply($command,$env{'user.home'});
3910: } else {
3911: return 'refused';
3912: }
3913: }
3914:
3915: # ---------------- Make a metadata query against the network of library servers
3916:
3917: sub metadata_query {
3918: my ($query,$custom,$customshow,$server_array)=@_;
3919: my %rhash;
3920: my @server_list = (defined($server_array) ? @$server_array
3921: : keys(%libserv) );
3922: for my $server (@server_list) {
3923: unless ($custom or $customshow) {
3924: my $reply=&reply("querysend:".&escape($query),$server);
3925: $rhash{$server}=$reply;
3926: }
3927: else {
3928: my $reply=&reply("querysend:".&escape($query).':'.
3929: &escape($custom).':'.&escape($customshow),
3930: $server);
3931: $rhash{$server}=$reply;
3932: }
3933: }
3934: return \%rhash;
3935: }
3936:
3937: # ----------------------------------------- Send log queries and wait for reply
3938:
3939: sub log_query {
3940: my ($uname,$udom,$query,%filters)=@_;
3941: my $uhome=&homeserver($uname,$udom);
3942: if ($uhome eq 'no_host') { return 'error: no_host'; }
3943: my $uhost=$hostname{$uhome};
3944: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3945: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3946: $uhome);
3947: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3948: return get_query_reply($queryid);
3949: }
3950:
3951: # ------- Request retrieval of institutional classlists for course(s)
3952:
3953: sub fetch_enrollment_query {
3954: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3955: my $homeserver;
3956: my $maxtries = 1;
3957: if ($context eq 'automated') {
3958: $homeserver = $perlvar{'lonHostID'};
3959: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3960: } else {
3961: $homeserver = &homeserver($cnum,$dom);
3962: }
3963: my $host=$hostname{$homeserver};
3964: my $cmd = '';
3965: foreach (keys %{$affiliatesref}) {
3966: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3967: }
3968: $cmd =~ s/%%$//;
3969: $cmd = &escape($cmd);
3970: my $query = 'fetchenrollment';
3971: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3972: unless ($queryid=~/^\Q$host\E\_/) {
3973: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3974: return 'error: '.$queryid;
3975: }
3976: my $reply = &get_query_reply($queryid);
3977: my $tries = 1;
3978: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3979: $reply = &get_query_reply($queryid);
3980: $tries ++;
3981: }
3982: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3983: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3984: } else {
3985: my @responses = split/:/,$reply;
3986: if ($homeserver eq $perlvar{'lonHostID'}) {
3987: foreach (@responses) {
3988: my ($key,$value) = split/=/,$_;
3989: $$replyref{$key} = $value;
3990: }
3991: } else {
3992: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3993: foreach (@responses) {
3994: my ($key,$value) = split/=/,$_;
3995: $$replyref{$key} = $value;
3996: if ($value > 0) {
3997: foreach (@{$$affiliatesref{$key}}) {
3998: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3999: my $destname = $pathname.'/'.$filename;
4000: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
4001: if ($xml_classlist =~ /^error/) {
4002: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
4003: } else {
4004: if ( open(FILE,">$destname") ) {
4005: print FILE &unescape($xml_classlist);
4006: close(FILE);
4007: } else {
4008: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
4009: }
4010: }
4011: }
4012: }
4013: }
4014: }
4015: return 'ok';
4016: }
4017: return 'error';
4018: }
4019:
4020: sub get_query_reply {
4021: my $queryid=shift;
4022: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
4023: my $reply='';
4024: for (1..100) {
4025: sleep 2;
4026: if (-e $replyfile.'.end') {
4027: if (open(my $fh,$replyfile)) {
4028: $reply.=<$fh>;
4029: close($fh);
4030: } else { return 'error: reply_file_error'; }
4031: return &unescape($reply);
4032: }
4033: }
4034: return 'timeout:'.$queryid;
4035: }
4036:
4037: sub courselog_query {
4038: #
4039: # possible filters:
4040: # url: url or symb
4041: # username
4042: # domain
4043: # action: view, submit, grade
4044: # start: timestamp
4045: # end: timestamp
4046: #
4047: my (%filters)=@_;
4048: unless ($env{'request.course.id'}) { return 'no_course'; }
4049: if ($filters{'url'}) {
4050: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
4051: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
4052: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
4053: }
4054: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
4055: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
4056: return &log_query($cname,$cdom,'courselog',%filters);
4057: }
4058:
4059: sub userlog_query {
4060: my ($uname,$udom,%filters)=@_;
4061: return &log_query($uname,$udom,'userlog',%filters);
4062: }
4063:
4064: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
4065:
4066: sub auto_run {
4067: my ($cnum,$cdom) = @_;
4068: my $homeserver = &homeserver($cnum,$cdom);
4069: my $response = &reply('autorun:'.$cdom,$homeserver);
4070: return $response;
4071: }
4072:
4073: sub auto_get_sections {
4074: my ($cnum,$cdom,$inst_coursecode) = @_;
4075: my $homeserver = &homeserver($cnum,$cdom);
4076: my @secs = ();
4077: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
4078: unless ($response eq 'refused') {
4079: @secs = split/:/,$response;
4080: }
4081: return @secs;
4082: }
4083:
4084: sub auto_new_course {
4085: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
4086: my $homeserver = &homeserver($cnum,$cdom);
4087: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
4088: return $response;
4089: }
4090:
4091: sub auto_validate_courseID {
4092: my ($cnum,$cdom,$inst_course_id) = @_;
4093: my $homeserver = &homeserver($cnum,$cdom);
4094: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
4095: return $response;
4096: }
4097:
4098: sub auto_create_password {
4099: my ($cnum,$cdom,$authparam) = @_;
4100: my $homeserver = &homeserver($cnum,$cdom);
4101: my $create_passwd = 0;
4102: my $authchk = '';
4103: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
4104: if ($response eq 'refused') {
4105: $authchk = 'refused';
4106: } else {
4107: ($authparam,$create_passwd,$authchk) = split/:/,$response;
4108: }
4109: return ($authparam,$create_passwd,$authchk);
4110: }
4111:
4112: sub auto_photo_permission {
4113: my ($cnum,$cdom,$students) = @_;
4114: my $homeserver = &homeserver($cnum,$cdom);
4115: my ($outcome,$perm_reqd,$conditions) =
4116: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
4117: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4118: return (undef,undef);
4119: }
4120: return ($outcome,$perm_reqd,$conditions);
4121: }
4122:
4123: sub auto_checkphotos {
4124: my ($uname,$udom,$pid) = @_;
4125: my $homeserver = &homeserver($uname,$udom);
4126: my ($result,$resulttype);
4127: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
4128: &escape($uname).':'.&escape($pid),
4129: $homeserver));
4130: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4131: return (undef,undef);
4132: }
4133: if ($outcome) {
4134: ($result,$resulttype) = split(/:/,$outcome);
4135: }
4136: return ($result,$resulttype);
4137: }
4138:
4139: sub auto_photochoice {
4140: my ($cnum,$cdom) = @_;
4141: my $homeserver = &homeserver($cnum,$cdom);
4142: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
4143: &escape($cdom),
4144: $homeserver)));
4145: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
4146: return (undef,undef);
4147: }
4148: return ($update,$comment);
4149: }
4150:
4151: sub auto_photoupdate {
4152: my ($affiliatesref,$dom,$cnum,$photo) = @_;
4153: my $homeserver = &homeserver($cnum,$dom);
4154: my $host=$hostname{$homeserver};
4155: my $cmd = '';
4156: my $maxtries = 1;
4157: foreach (keys %{$affiliatesref}) {
4158: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
4159: }
4160: $cmd =~ s/%%$//;
4161: $cmd = &escape($cmd);
4162: my $query = 'institutionalphotos';
4163: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
4164: unless ($queryid=~/^\Q$host\E\_/) {
4165: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
4166: return 'error: '.$queryid;
4167: }
4168: my $reply = &get_query_reply($queryid);
4169: my $tries = 1;
4170: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
4171: $reply = &get_query_reply($queryid);
4172: $tries ++;
4173: }
4174: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
4175: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
4176: } else {
4177: my @responses = split(/:/,$reply);
4178: my $outcome = shift(@responses);
4179: foreach my $item (@responses) {
4180: my ($key,$value) = split(/=/,$item);
4181: $$photo{$key} = $value;
4182: }
4183: return $outcome;
4184: }
4185: return 'error';
4186: }
4187:
4188: sub auto_instcode_format {
4189: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
4190: my $courses = '';
4191: my @homeservers;
4192: if ($caller eq 'global') {
4193: foreach my $tryserver (keys %libserv) {
4194: if ($hostdom{$tryserver} eq $codedom) {
4195: if (!grep/^\Q$tryserver\E$/,@homeservers) {
4196: push(@homeservers,$tryserver);
4197: }
4198: }
4199: }
4200: } else {
4201: push(@homeservers,&homeserver($caller,$codedom));
4202: }
4203: foreach (keys %{$instcodes}) {
4204: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
4205: }
4206: chop($courses);
4207: my $ok_response = 0;
4208: my $response;
4209: while (@homeservers > 0 && $ok_response == 0) {
4210: my $server = shift(@homeservers);
4211: $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$server);
4212: if ($response !~ /(con_lost|error|no_such_host|refused)/) {
4213: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) =
4214: split/:/,$response;
4215: %{$codes} = (%{$codes},&str2hash($codes_str));
4216: push(@{$codetitles},&str2array($codetitles_str));
4217: %{$cat_titles} = (%{$cat_titles},&str2hash($cat_titles_str));
4218: %{$cat_order} = (%{$cat_order},&str2hash($cat_order_str));
4219: $ok_response = 1;
4220: }
4221: }
4222: if ($ok_response) {
4223: return 'ok';
4224: } else {
4225: return $response;
4226: }
4227: }
4228:
4229: sub auto_validate_class_sec {
4230: my ($cdom,$cnum,$owner,$inst_class) = @_;
4231: my $homeserver = &homeserver($cnum,$cdom);
4232: my $response=&reply('autovalidateclass_sec:'.$inst_class.':'.
4233: &escape($owner).':'.$cdom,$homeserver);
4234: return $response;
4235: }
4236:
4237: # ------------------------------------------------------- Course Group routines
4238:
4239: sub get_coursegroups {
4240: my ($cdom,$cnum,$group) = @_;
4241: return(&dump('coursegroups',$cdom,$cnum,$group));
4242: }
4243:
4244: sub modify_coursegroup {
4245: my ($cdom,$cnum,$groupsettings) = @_;
4246: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
4247: }
4248:
4249: sub modify_group_roles {
4250: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
4251: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
4252: my $role = 'gr/'.&escape($userprivs);
4253: my ($uname,$udom) = split(/:/,$user);
4254: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
4255: if ($result eq 'ok') {
4256: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
4257: }
4258: return $result;
4259: }
4260:
4261: sub modify_coursegroup_membership {
4262: my ($cdom,$cnum,$membership) = @_;
4263: my $result = &put('groupmembership',$membership,$cdom,$cnum);
4264: return $result;
4265: }
4266:
4267: sub get_active_groups {
4268: my ($udom,$uname,$cdom,$cnum) = @_;
4269: my $now = time;
4270: my %groups = ();
4271: foreach my $key (keys(%env)) {
4272: if ($key =~ m-user\.role\.gr\./([^/]+)/([^/]+)/(\w+)$-) {
4273: my ($start,$end) = split(/\./,$env{$key});
4274: if (($end!=0) && ($end<$now)) { next; }
4275: if (($start!=0) && ($start>$now)) { next; }
4276: if ($1 eq $cdom && $2 eq $cnum) {
4277: $groups{$3} = $env{$key} ;
4278: }
4279: }
4280: }
4281: return %groups;
4282: }
4283:
4284: sub get_group_membership {
4285: my ($cdom,$cnum,$group) = @_;
4286: return(&dump('groupmembership',$cdom,$cnum,$group));
4287: }
4288:
4289: sub get_users_groups {
4290: my ($udom,$uname,$courseid) = @_;
4291: my @usersgroups;
4292: my $cachetime=1800;
4293: $courseid=~s/\_/\//g;
4294: $courseid=~s/^(\w)/\/$1/;
4295:
4296: my $hashid="$udom:$uname:$courseid";
4297: my ($grouplist,$cached)=&is_cached_new('getgroups',$hashid);
4298: if (defined($cached)) {
4299: @usersgroups = split(/:/,$grouplist);
4300: } else {
4301: $grouplist = '';
4302: my %roleshash = &dump('roles',$udom,$uname,$courseid);
4303: my ($tmp) = keys(%roleshash);
4304: if ($tmp=~/^error:/) {
4305: &logthis('Error retrieving roles: '.$tmp.' for '.$uname.':'.$udom);
4306: } else {
4307: my $access_end = $env{'course.'.$courseid.
4308: '.default_enrollment_end_date'};
4309: my $now = time;
4310: foreach my $key (keys(%roleshash)) {
4311: if ($key =~ /^\Q$courseid\E\/(\w+)\_gr$/) {
4312: my $group = $1;
4313: if ($roleshash{$key} =~ /_(\d+)_(\d+)$/) {
4314: my $start = $2;
4315: my $end = $1;
4316: if ($start == -1) { next; } # deleted from group
4317: if (($start!=0) && ($start>$now)) { next; }
4318: if (($end!=0) && ($end<$now)) {
4319: if ($access_end && $access_end < $now) {
4320: if ($access_end - $end < 86400) {
4321: push(@usersgroups,$group);
4322: }
4323: }
4324: next;
4325: }
4326: push(@usersgroups,$group);
4327: }
4328: }
4329: }
4330: @usersgroups = &sort_course_groups($courseid,@usersgroups);
4331: $grouplist = join(':',@usersgroups);
4332: &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
4333: }
4334: }
4335: return @usersgroups;
4336: }
4337:
4338: sub devalidate_getgroups_cache {
4339: my ($udom,$uname,$cdom,$cnum)=@_;
4340: my $courseid = $cdom.'_'.$cnum;
4341: $courseid=~s/\_/\//g;
4342: $courseid=~s/^(\w)/\/$1/;
4343: my $hashid="$udom:$uname:$courseid";
4344: &devalidate_cache_new('getgroups',$hashid);
4345: }
4346:
4347: # ------------------------------------------------------------------ Plain Text
4348:
4349: sub plaintext {
4350: my ($short,$type,$cid) = @_;
4351: if ($short =~ /^cr/) {
4352: return (split('/',$short))[-1];
4353: }
4354: if (!defined($cid)) {
4355: $cid = $env{'request.course.id'};
4356: }
4357: if (defined($cid) && defined($env{'course.'.$cid.'.'.$short.'.plaintext'})) {
4358: return &Apache::lonlocal::mt($env{'course.'.$cid.'.'.$short.
4359: '.plaintext'});
4360: }
4361: my %rolenames = (
4362: Course => 'std',
4363: Group => 'alt1',
4364: );
4365: if (defined($type) &&
4366: defined($rolenames{$type}) &&
4367: defined($prp{$short}{$rolenames{$type}})) {
4368: return &Apache::lonlocal::mt($prp{$short}{$rolenames{$type}});
4369: } else {
4370: return &Apache::lonlocal::mt($prp{$short}{'std'});
4371: }
4372: }
4373:
4374: # ----------------------------------------------------------------- Assign Role
4375:
4376: sub assignrole {
4377: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
4378: my $mrole;
4379: if ($role =~ /^cr\//) {
4380: my $cwosec=$url;
4381: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4382: unless (&allowed('ccr',$cwosec)) {
4383: &logthis('Refused custom assignrole: '.
4384: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4385: $env{'user.name'}.' at '.$env{'user.domain'});
4386: return 'refused';
4387: }
4388: $mrole='cr';
4389: } elsif ($role =~ /^gr\//) {
4390: my $cwogrp=$url;
4391: $cwogrp=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4392: unless (&allowed('mdg',$cwogrp)) {
4393: &logthis('Refused group assignrole: '.
4394: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4395: $env{'user.name'}.' at '.$env{'user.domain'});
4396: return 'refused';
4397: }
4398: $mrole='gr';
4399: } else {
4400: my $cwosec=$url;
4401: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4402: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
4403: &logthis('Refused assignrole: '.
4404: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4405: $env{'user.name'}.' at '.$env{'user.domain'});
4406: return 'refused';
4407: }
4408: $mrole=$role;
4409: }
4410: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4411: "$udom:$uname:$url".'_'."$mrole=$role";
4412: if ($end) { $command.='_'.$end; }
4413: if ($start) {
4414: if ($end) {
4415: $command.='_'.$start;
4416: } else {
4417: $command.='_0_'.$start;
4418: }
4419: }
4420: my $origstart = $start;
4421: my $origend = $end;
4422: # actually delete
4423: if ($deleteflag) {
4424: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
4425: # modify command to delete the role
4426: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
4427: "$udom:$uname:$url".'_'."$mrole";
4428: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
4429: # set start and finish to negative values for userrolelog
4430: $start=-1;
4431: $end=-1;
4432: }
4433: }
4434: # send command
4435: my $answer=&reply($command,&homeserver($uname,$udom));
4436: # log new user role if status is ok
4437: if ($answer eq 'ok') {
4438: &userrolelog($role,$uname,$udom,$url,$start,$end);
4439: # for course roles, perform group memberships changes triggered by role change.
4440: unless ($role =~ /^gr/) {
4441: &Apache::longroup::group_changes($udom,$uname,$url,$role,$origend,
4442: $origstart);
4443: }
4444: }
4445: return $answer;
4446: }
4447:
4448: # -------------------------------------------------- Modify user authentication
4449: # Overrides without validation
4450:
4451: sub modifyuserauth {
4452: my ($udom,$uname,$umode,$upass)=@_;
4453: my $uhome=&homeserver($uname,$udom);
4454: unless (&allowed('mau',$udom)) { return 'refused'; }
4455: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
4456: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4457: ' in domain '.$env{'request.role.domain'});
4458: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
4459: &escape($upass),$uhome);
4460: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
4461: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
4462: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4463: &log($udom,,$uname,$uhome,
4464: 'Authentication changed by '.$env{'user.domain'}.', '.
4465: $env{'user.name'}.', '.$umode.
4466: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4467: unless ($reply eq 'ok') {
4468: &logthis('Authentication mode error: '.$reply);
4469: return 'error: '.$reply;
4470: }
4471: return 'ok';
4472: }
4473:
4474: # --------------------------------------------------------------- Modify a user
4475:
4476: sub modifyuser {
4477: my ($udom, $uname, $uid,
4478: $umode, $upass, $first,
4479: $middle, $last, $gene,
4480: $forceid, $desiredhome, $email)=@_;
4481: $udom=~s/\W//g;
4482: $uname=~s/\W//g;
4483: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
4484: $umode.', '.$first.', '.$middle.', '.
4485: $last.', '.$gene.'(forceid: '.$forceid.')'.
4486: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
4487: ' desiredhome not specified').
4488: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4489: ' in domain '.$env{'request.role.domain'});
4490: my $uhome=&homeserver($uname,$udom,'true');
4491: # ----------------------------------------------------------------- Create User
4492: if (($uhome eq 'no_host') &&
4493: (($umode && $upass) || ($umode eq 'localauth'))) {
4494: my $unhome='';
4495: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
4496: $unhome = $desiredhome;
4497: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
4498: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
4499: } else { # load balancing routine for determining $unhome
4500: my $tryserver;
4501: my $loadm=10000000;
4502: foreach $tryserver (keys %libserv) {
4503: if ($hostdom{$tryserver} eq $udom) {
4504: my $answer=reply('load',$tryserver);
4505: if (($answer=~/\d+/) && ($answer<$loadm)) {
4506: $loadm=$answer;
4507: $unhome=$tryserver;
4508: }
4509: }
4510: }
4511: }
4512: if (($unhome eq '') || ($unhome eq 'no_host')) {
4513: return 'error: unable to find a home server for '.$uname.
4514: ' in domain '.$udom;
4515: }
4516: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
4517: &escape($upass),$unhome);
4518: unless ($reply eq 'ok') {
4519: return 'error: '.$reply;
4520: }
4521: $uhome=&homeserver($uname,$udom,'true');
4522: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
4523: return 'error: unable verify users home machine.';
4524: }
4525: } # End of creation of new user
4526: # ---------------------------------------------------------------------- Add ID
4527: if ($uid) {
4528: $uid=~tr/A-Z/a-z/;
4529: my %uidhash=&idrget($udom,$uname);
4530: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
4531: && (!$forceid)) {
4532: unless ($uid eq $uidhash{$uname}) {
4533: return 'error: user id "'.$uid.'" does not match '.
4534: 'current user id "'.$uidhash{$uname}.'".';
4535: }
4536: } else {
4537: &idput($udom,($uname => $uid));
4538: }
4539: }
4540: # -------------------------------------------------------------- Add names, etc
4541: my @tmp=&get('environment',
4542: ['firstname','middlename','lastname','generation'],
4543: $udom,$uname);
4544: my %names;
4545: if ($tmp[0] =~ m/^error:.*/) {
4546: %names=();
4547: } else {
4548: %names = @tmp;
4549: }
4550: #
4551: # Make sure to not trash student environment if instructor does not bother
4552: # to supply name and email information
4553: #
4554: if ($first) { $names{'firstname'} = $first; }
4555: if (defined($middle)) { $names{'middlename'} = $middle; }
4556: if ($last) { $names{'lastname'} = $last; }
4557: if (defined($gene)) { $names{'generation'} = $gene; }
4558: if ($email) {
4559: $email=~s/[^\w\@\.\-\,]//gs;
4560: if ($email=~/\@/) { $names{'notification'} = $email;
4561: $names{'critnotification'} = $email;
4562: $names{'permanentemail'} = $email; }
4563: }
4564: my $reply = &put('environment', \%names, $udom,$uname);
4565: if ($reply ne 'ok') { return 'error: '.$reply; }
4566: &devalidate_cache_new('namescache',$uname.':'.$udom);
4567: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4568: $umode.', '.$first.', '.$middle.', '.
4569: $last.', '.$gene.' by '.
4570: $env{'user.name'}.' at '.$env{'user.domain'});
4571: return 'ok';
4572: }
4573:
4574: # -------------------------------------------------------------- Modify student
4575:
4576: sub modifystudent {
4577: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4578: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4579: if (!$cid) {
4580: unless ($cid=$env{'request.course.id'}) {
4581: return 'not_in_class';
4582: }
4583: }
4584: # --------------------------------------------------------------- Make the user
4585: my $reply=&modifyuser
4586: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4587: $desiredhome,$email);
4588: unless ($reply eq 'ok') { return $reply; }
4589: # This will cause &modify_student_enrollment to get the uid from the
4590: # students environment
4591: $uid = undef if (!$forceid);
4592: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4593: $gene,$usec,$end,$start,$type,$locktype,$cid);
4594: return $reply;
4595: }
4596:
4597: sub modify_student_enrollment {
4598: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4599: my ($cdom,$cnum,$chome);
4600: if (!$cid) {
4601: unless ($cid=$env{'request.course.id'}) {
4602: return 'not_in_class';
4603: }
4604: $cdom=$env{'course.'.$cid.'.domain'};
4605: $cnum=$env{'course.'.$cid.'.num'};
4606: } else {
4607: ($cdom,$cnum)=split(/_/,$cid);
4608: }
4609: $chome=$env{'course.'.$cid.'.home'};
4610: if (!$chome) {
4611: $chome=&homeserver($cnum,$cdom);
4612: }
4613: if (!$chome) { return 'unknown_course'; }
4614: # Make sure the user exists
4615: my $uhome=&homeserver($uname,$udom);
4616: if (($uhome eq '') || ($uhome eq 'no_host')) {
4617: return 'error: no such user';
4618: }
4619: # Get student data if we were not given enough information
4620: if (!defined($first) || $first eq '' ||
4621: !defined($last) || $last eq '' ||
4622: !defined($uid) || $uid eq '' ||
4623: !defined($middle) || $middle eq '' ||
4624: !defined($gene) || $gene eq '') {
4625: # They did not supply us with enough data to enroll the student, so
4626: # we need to pick up more information.
4627: my %tmp = &get('environment',
4628: ['firstname','middlename','lastname', 'generation','id']
4629: ,$udom,$uname);
4630:
4631: #foreach (keys(%tmp)) {
4632: # &logthis("key $_ = ".$tmp{$_});
4633: #}
4634: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4635: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4636: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4637: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4638: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4639: }
4640: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4641: my $reply=cput('classlist',
4642: {"$uname:$udom" =>
4643: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4644: $cdom,$cnum);
4645: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4646: return 'error: '.$reply;
4647: } else {
4648: &devalidate_getsection_cache($udom,$uname,$cid);
4649: }
4650: # Add student role to user
4651: my $uurl='/'.$cid;
4652: $uurl=~s/\_/\//g;
4653: if ($usec) {
4654: $uurl.='/'.$usec;
4655: }
4656: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4657: }
4658:
4659: sub format_name {
4660: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4661: my $name;
4662: if ($first ne 'lastname') {
4663: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4664: } else {
4665: if ($lastname=~/\S/) {
4666: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4667: $name=~s/\s+,/,/;
4668: } else {
4669: $name.= $firstname.' '.$middlename.' '.$generation;
4670: }
4671: }
4672: $name=~s/^\s+//;
4673: $name=~s/\s+$//;
4674: $name=~s/\s+/ /g;
4675: return $name;
4676: }
4677:
4678: # ------------------------------------------------- Write to course preferences
4679:
4680: sub writecoursepref {
4681: my ($courseid,%prefs)=@_;
4682: $courseid=~s/^\///;
4683: $courseid=~s/\_/\//g;
4684: my ($cdomain,$cnum)=split(/\//,$courseid);
4685: my $chome=homeserver($cnum,$cdomain);
4686: if (($chome eq '') || ($chome eq 'no_host')) {
4687: return 'error: no such course';
4688: }
4689: my $cstring='';
4690: foreach (keys %prefs) {
4691: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
4692: }
4693: $cstring=~s/\&$//;
4694: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
4695: }
4696:
4697: # ---------------------------------------------------------- Make/modify course
4698:
4699: sub createcourse {
4700: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,
4701: $course_owner,$crstype)=@_;
4702: $url=&declutter($url);
4703: my $cid='';
4704: unless (&allowed('ccc',$udom)) {
4705: return 'refused';
4706: }
4707: # ------------------------------------------------------------------- Create ID
4708: my $uname=int(1+rand(9)).
4709: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
4710: substr($$.time,0,5).unpack("H8",pack("I32",time)).
4711: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4712: # ----------------------------------------------- Make sure that does not exist
4713: my $uhome=&homeserver($uname,$udom,'true');
4714: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4715: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
4716: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4717: $uhome=&homeserver($uname,$udom,'true');
4718: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4719: return 'error: unable to generate unique course-ID';
4720: }
4721: }
4722: # ------------------------------------------------ Check supplied server name
4723: $course_server = $env{'user.homeserver'} if (! defined($course_server));
4724: if (! exists($libserv{$course_server})) {
4725: return 'error:bad server name '.$course_server;
4726: }
4727: # ------------------------------------------------------------- Make the course
4728: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
4729: $course_server);
4730: unless ($reply eq 'ok') { return 'error: '.$reply; }
4731: $uhome=&homeserver($uname,$udom,'true');
4732: if (($uhome eq '') || ($uhome eq 'no_host')) {
4733: return 'error: no such course';
4734: }
4735: # ----------------------------------------------------------------- Course made
4736: # log existence
4737: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
4738: ':'.&escape($inst_code).':'.&escape($course_owner).':'.
4739: &escape($crstype),$uhome);
4740: &flushcourselogs();
4741: # set toplevel url
4742: my $topurl=$url;
4743: unless ($nonstandard) {
4744: # ------------------------------------------ For standard courses, make top url
4745: my $mapurl=&clutter($url);
4746: if ($mapurl eq '/res/') { $mapurl=''; }
4747: $env{'form.initmap'}=(<<ENDINITMAP);
4748: <map>
4749: <resource id="1" type="start"></resource>
4750: <resource id="2" src="$mapurl"></resource>
4751: <resource id="3" type="finish"></resource>
4752: <link index="1" from="1" to="2"></link>
4753: <link index="2" from="2" to="3"></link>
4754: </map>
4755: ENDINITMAP
4756: $topurl=&declutter(
4757: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
4758: );
4759: }
4760: # ----------------------------------------------------------- Write preferences
4761: &writecoursepref($udom.'_'.$uname,
4762: ('description' => $description,
4763: 'url' => $topurl));
4764: return '/'.$udom.'/'.$uname;
4765: }
4766:
4767: # ---------------------------------------------------------- Assign Custom Role
4768:
4769: sub assigncustomrole {
4770: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
4771: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
4772: $end,$start,$deleteflag);
4773: }
4774:
4775: # ----------------------------------------------------------------- Revoke Role
4776:
4777: sub revokerole {
4778: my ($udom,$uname,$url,$role,$deleteflag)=@_;
4779: my $now=time;
4780: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
4781: }
4782:
4783: # ---------------------------------------------------------- Revoke Custom Role
4784:
4785: sub revokecustomrole {
4786: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
4787: my $now=time;
4788: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
4789: $deleteflag);
4790: }
4791:
4792: # ------------------------------------------------------------ Disk usage
4793: sub diskusage {
4794: my ($udom,$uname,$directoryRoot)=@_;
4795: $directoryRoot =~ s/\/$//;
4796: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
4797: return $listing;
4798: }
4799:
4800: sub is_locked {
4801: my ($file_name, $domain, $user) = @_;
4802: my @check;
4803: my $is_locked;
4804: push @check, $file_name;
4805: my %locked = &get('file_permissions',\@check,
4806: $env{'user.domain'},$env{'user.name'});
4807: my ($tmp)=keys(%locked);
4808: if ($tmp=~/^error:/) { undef(%locked); }
4809:
4810: if (ref($locked{$file_name}) eq 'ARRAY') {
4811: $is_locked = 'false';
4812: foreach my $entry (@{$locked{$file_name}}) {
4813: if (ref($entry) eq 'ARRAY') {
4814: $is_locked = 'true';
4815: last;
4816: }
4817: }
4818: } else {
4819: $is_locked = 'false';
4820: }
4821: }
4822:
4823: sub declutter_portfile {
4824: my ($file) = @_;
4825: &logthis("got $file");
4826: $file =~ s-^(/portfolio/|portfolio/)-/-;
4827: &logthis("ret $file");
4828: return $file;
4829: }
4830:
4831: # ------------------------------------------------------------- Mark as Read Only
4832:
4833: sub mark_as_readonly {
4834: my ($domain,$user,$files,$what) = @_;
4835: my %current_permissions = &dump('file_permissions',$domain,$user);
4836: my ($tmp)=keys(%current_permissions);
4837: if ($tmp=~/^error:/) { undef(%current_permissions); }
4838: foreach my $file (@{$files}) {
4839: $file = &declutter_portfile($file);
4840: push(@{$current_permissions{$file}},$what);
4841: }
4842: &put('file_permissions',\%current_permissions,$domain,$user);
4843: return;
4844: }
4845:
4846: # ------------------------------------------------------------Save Selected Files
4847:
4848: sub save_selected_files {
4849: my ($user, $path, @files) = @_;
4850: my $filename = $user."savedfiles";
4851: my @other_files = &files_not_in_path($user, $path);
4852: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4853: foreach my $file (@files) {
4854: print (OUT $env{'form.currentpath'}.$file."\n");
4855: }
4856: foreach my $file (@other_files) {
4857: print (OUT $file."\n");
4858: }
4859: close (OUT);
4860: return 'ok';
4861: }
4862:
4863: sub clear_selected_files {
4864: my ($user) = @_;
4865: my $filename = $user."savedfiles";
4866: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4867: print (OUT undef);
4868: close (OUT);
4869: return ("ok");
4870: }
4871:
4872: sub files_in_path {
4873: my ($user, $path) = @_;
4874: my $filename = $user."savedfiles";
4875: my %return_files;
4876: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4877: while (my $line_in = <IN>) {
4878: chomp ($line_in);
4879: my @paths_and_file = split (m!/!, $line_in);
4880: my $file_part = pop (@paths_and_file);
4881: my $path_part = join ('/', @paths_and_file);
4882: $path_part.='/';
4883: my $path_and_file = $path_part.$file_part;
4884: if ($path_part eq $path) {
4885: $return_files{$file_part}= 'selected';
4886: }
4887: }
4888: close (IN);
4889: return (\%return_files);
4890: }
4891:
4892: # called in portfolio select mode, to show files selected NOT in current directory
4893: sub files_not_in_path {
4894: my ($user, $path) = @_;
4895: my $filename = $user."savedfiles";
4896: my @return_files;
4897: my $path_part;
4898: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4899: while (<IN>) {
4900: #ok, I know it's clunky, but I want it to work
4901: my @paths_and_file = split m!/!, $_;
4902: my $file_part = pop (@paths_and_file);
4903: chomp ($file_part);
4904: my $path_part = join ('/', @paths_and_file);
4905: $path_part .= '/';
4906: my $path_and_file = $path_part.$file_part;
4907: if ($path_part ne $path) {
4908: push (@return_files, ($path_and_file));
4909: }
4910: }
4911: close (OUT);
4912: return (@return_files);
4913: }
4914:
4915: #----------------------------------------------Get portfolio file permissions
4916:
4917: sub get_portfile_permissions {
4918: my ($domain,$user) = @_;
4919: my %current_permissions = &dump('file_permissions',$domain,$user);
4920: my ($tmp)=keys(%current_permissions);
4921: if ($tmp=~/^error:/) { undef(%current_permissions); }
4922: return \%current_permissions;
4923: }
4924:
4925: #---------------------------------------------Get portfolio file access controls
4926:
4927: sub get_access_controls {
4928: my ($current_permissions,$group,$file) = @_;
4929: my %access;
4930: my $real_file = $file;
4931: $file =~ s/\.meta$//;
4932: if (defined($file)) {
4933: if (ref($$current_permissions{$file."\0".'accesscontrol'}) eq 'HASH') {
4934: foreach my $control (keys(%{$$current_permissions{$file."\0".'accesscontrol'}})) {
4935: $access{$real_file}{$control} = $$current_permissions{$file."\0".$control};
4936: }
4937: }
4938: } else {
4939: foreach my $key (keys(%{$current_permissions})) {
4940: if ($key =~ /\0accesscontrol$/) {
4941: if (defined($group)) {
4942: if ($key !~ m-^\Q$group\E/-) {
4943: next;
4944: }
4945: }
4946: my ($fullpath) = split(/\0/,$key);
4947: if (ref($$current_permissions{$key}) eq 'HASH') {
4948: foreach my $control (keys(%{$$current_permissions{$key}})) {
4949: $access{$fullpath}{$control}=$$current_permissions{$fullpath."\0".$control};
4950: }
4951: }
4952: }
4953: }
4954: }
4955: return %access;
4956: }
4957:
4958: sub modify_access_controls {
4959: my ($file_name,$changes,$domain,$user)=@_;
4960: my ($outcome,$deloutcome);
4961: my %store_permissions;
4962: my %new_values;
4963: my %new_control;
4964: my %translation;
4965: my @deletions = ();
4966: my $now = time;
4967: if (exists($$changes{'activate'})) {
4968: if (ref($$changes{'activate'}) eq 'HASH') {
4969: my @newitems = sort(keys(%{$$changes{'activate'}}));
4970: my $numnew = scalar(@newitems);
4971: for (my $i=0; $i<$numnew; $i++) {
4972: my $newkey = $newitems[$i];
4973: my $newid = &Apache::loncommon::get_cgi_id();
4974: $newkey =~ s/^(\d+)/$newid/;
4975: $translation{$1} = $newid;
4976: $new_values{$file_name."\0".$newkey} =
4977: $$changes{'activate'}{$newitems[$i]};
4978: $new_control{$newkey} = $now;
4979: }
4980: }
4981: }
4982: my %todelete;
4983: my %changed_items;
4984: foreach my $action ('delete','update') {
4985: if (exists($$changes{$action})) {
4986: if (ref($$changes{$action}) eq 'HASH') {
4987: foreach my $key (keys(%{$$changes{$action}})) {
4988: my ($itemnum) = ($key =~ /^([^:]+):/);
4989: if ($action eq 'delete') {
4990: $todelete{$itemnum} = 1;
4991: } else {
4992: $changed_items{$itemnum} = $key;
4993: }
4994: }
4995: }
4996: }
4997: }
4998: # get lock on access controls for file.
4999: my $lockhash = {
5000: $file_name."\0".'locked_access_records' => $env{'user.name'}.
5001: ':'.$env{'user.domain'},
5002: };
5003: my $tries = 0;
5004: my $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5005:
5006: while (($gotlock ne 'ok') && $tries <3) {
5007: $tries ++;
5008: sleep 1;
5009: $gotlock = &newput('file_permissions',$lockhash,$domain,$user);
5010: }
5011: if ($gotlock eq 'ok') {
5012: my %curr_permissions = &dump('file_permissions',$domain,$user,$file_name);
5013: my ($tmp)=keys(%curr_permissions);
5014: if ($tmp=~/^error:/) { undef(%curr_permissions); }
5015: if (exists($curr_permissions{$file_name."\0".'accesscontrol'})) {
5016: my $curr_controls = $curr_permissions{$file_name."\0".'accesscontrol'};
5017: if (ref($curr_controls) eq 'HASH') {
5018: foreach my $control_item (keys(%{$curr_controls})) {
5019: my ($itemnum) = ($control_item =~ /^([^:]+):/);
5020: if (defined($todelete{$itemnum})) {
5021: push(@deletions,$file_name."\0".$control_item);
5022: } else {
5023: if (defined($changed_items{$itemnum})) {
5024: $new_control{$changed_items{$itemnum}} = $now;
5025: push(@deletions,$file_name."\0".$control_item);
5026: $new_values{$file_name."\0".$changed_items{$itemnum}} = $$changes{'update'}{$changed_items{$itemnum}};
5027: } else {
5028: $new_control{$control_item} = $$curr_controls{$control_item};
5029: }
5030: }
5031: }
5032: }
5033: }
5034: $deloutcome = &del('file_permissions',\@deletions,$domain,$user);
5035: $new_values{$file_name."\0".'accesscontrol'} = \%new_control;
5036: $outcome = &put('file_permissions',\%new_values,$domain,$user);
5037: # remove lock
5038: my @del_lock = ($file_name."\0".'locked_access_records');
5039: my $dellockoutcome = &del('file_permissions',\@del_lock,$domain,$user);
5040: } else {
5041: $outcome = "error: could not obtain lockfile\n";
5042: }
5043: return ($outcome,$deloutcome,\%new_values,\%translation);
5044: }
5045:
5046: #------------------------------------------------------Get Marked as Read Only
5047:
5048: sub get_marked_as_readonly {
5049: my ($domain,$user,$what,$group) = @_;
5050: my $current_permissions = &get_portfile_permissions($domain,$user);
5051: my @readonly_files;
5052: my $cmp1=$what;
5053: if (ref($what)) { $cmp1=join('',@{$what}) };
5054: while (my ($file_name,$value) = each(%{$current_permissions})) {
5055: if (defined($group)) {
5056: if ($file_name !~ m-^\Q$group\E/-) {
5057: next;
5058: }
5059: }
5060: if (ref($value) eq "ARRAY"){
5061: foreach my $stored_what (@{$value}) {
5062: my $cmp2=$stored_what;
5063: if (ref($stored_what) eq 'ARRAY') {
5064: $cmp2=join('',@{$stored_what});
5065: }
5066: if ($cmp1 eq $cmp2) {
5067: push(@readonly_files, $file_name);
5068: last;
5069: } elsif (!defined($what)) {
5070: push(@readonly_files, $file_name);
5071: last;
5072: }
5073: }
5074: }
5075: }
5076: return @readonly_files;
5077: }
5078: #-----------------------------------------------------------Get Marked as Read Only Hash
5079:
5080: sub get_marked_as_readonly_hash {
5081: my ($current_permissions,$group,$what) = @_;
5082: my %readonly_files;
5083: while (my ($file_name,$value) = each(%{$current_permissions})) {
5084: if (defined($group)) {
5085: if ($file_name !~ m-^\Q$group\E/-) {
5086: next;
5087: }
5088: }
5089: if (ref($value) eq "ARRAY"){
5090: foreach my $stored_what (@{$value}) {
5091: if (ref($stored_what) eq 'ARRAY') {
5092: foreach my $lock_descriptor(@{$stored_what}) {
5093: if ($lock_descriptor eq 'graded') {
5094: $readonly_files{$file_name} = 'graded';
5095: } elsif ($lock_descriptor eq 'handback') {
5096: $readonly_files{$file_name} = 'handback';
5097: } else {
5098: if (!exists($readonly_files{$file_name})) {
5099: $readonly_files{$file_name} = 'locked';
5100: }
5101: }
5102: }
5103: }
5104: }
5105: }
5106: }
5107: return %readonly_files;
5108: }
5109: # ------------------------------------------------------------ Unmark as Read Only
5110:
5111: sub unmark_as_readonly {
5112: # unmarks $file_name (if $file_name is defined), or all files locked by $what
5113: # for portfolio submissions, $what contains [$symb,$crsid]
5114: my ($domain,$user,$what,$file_name,$group) = @_;
5115: $file_name = &declutter_portfile($file_name);
5116: my $symb_crs = $what;
5117: if (ref($what)) { $symb_crs=join('',@$what); }
5118: my %current_permissions = &dump('file_permissions',$domain,$user,$group);
5119: my ($tmp)=keys(%current_permissions);
5120: if ($tmp=~/^error:/) { undef(%current_permissions); }
5121: my @readonly_files = &get_marked_as_readonly($domain,$user,$what,$group);
5122: foreach my $file (@readonly_files) {
5123: my $clean_file = &declutter_portfile($file);
5124: if (defined($file_name) && ($file_name ne $clean_file)) { next; }
5125: my $current_locks = $current_permissions{$file};
5126: my @new_locks;
5127: my @del_keys;
5128: if (ref($current_locks) eq "ARRAY"){
5129: foreach my $locker (@{$current_locks}) {
5130: my $compare=$locker;
5131: if (ref($locker) eq 'ARRAY') {
5132: $compare=join('',@{$locker});
5133: if ($compare ne $symb_crs) {
5134: push(@new_locks, $locker);
5135: }
5136: }
5137: }
5138: if (scalar(@new_locks) > 0) {
5139: $current_permissions{$file} = \@new_locks;
5140: } else {
5141: push(@del_keys, $file);
5142: &del('file_permissions',\@del_keys, $domain, $user);
5143: delete($current_permissions{$file});
5144: }
5145: }
5146: }
5147: &put('file_permissions',\%current_permissions,$domain,$user);
5148: return;
5149: }
5150:
5151: # ------------------------------------------------------------ Directory lister
5152:
5153: sub dirlist {
5154: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
5155:
5156: $uri=~s/^\///;
5157: $uri=~s/\/$//;
5158: my ($udom, $uname);
5159: (undef,$udom,$uname)=split(/\//,$uri);
5160: if(defined($userdomain)) {
5161: $udom = $userdomain;
5162: }
5163: if(defined($username)) {
5164: $uname = $username;
5165: }
5166:
5167: my $dirRoot = $perlvar{'lonDocRoot'};
5168: if(defined($alternateDirectoryRoot)) {
5169: $dirRoot = $alternateDirectoryRoot;
5170: $dirRoot =~ s/\/$//;
5171: }
5172:
5173: if($udom) {
5174: if($uname) {
5175: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
5176: homeserver($uname,$udom));
5177: my @listing_results;
5178: if ($listing eq 'unknown_cmd') {
5179: $listing=reply('ls:'.$dirRoot.'/'.$uri,
5180: homeserver($uname,$udom));
5181: @listing_results = split(/:/,$listing);
5182: } else {
5183: @listing_results = map { &unescape($_); } split(/:/,$listing);
5184: }
5185: return @listing_results;
5186: } elsif(!defined($alternateDirectoryRoot)) {
5187: my $tryserver;
5188: my %allusers=();
5189: foreach $tryserver (keys %libserv) {
5190: if($hostdom{$tryserver} eq $udom) {
5191: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
5192: $udom, $tryserver);
5193: my @listing_results;
5194: if ($listing eq 'unknown_cmd') {
5195: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
5196: $udom, $tryserver);
5197: @listing_results = split(/:/,$listing);
5198: } else {
5199: @listing_results =
5200: map { &unescape($_); } split(/:/,$listing);
5201: }
5202: if ($listing_results[0] ne 'no_such_dir' &&
5203: $listing_results[0] ne 'empty' &&
5204: $listing_results[0] ne 'con_lost') {
5205: foreach (@listing_results) {
5206: my ($entry,@stat)=split(/&/,$_);
5207: $allusers{$entry}=1;
5208: }
5209: }
5210: }
5211: }
5212: my $alluserstr='';
5213: foreach (sort keys %allusers) {
5214: $alluserstr.=$_.'&user:';
5215: }
5216: $alluserstr=~s/:$//;
5217: return split(/:/,$alluserstr);
5218: } else {
5219: my @emptyResults = ();
5220: push(@emptyResults, 'missing user name');
5221: return split(':',@emptyResults);
5222: }
5223: } elsif(!defined($alternateDirectoryRoot)) {
5224: my $tryserver;
5225: my %alldom=();
5226: foreach $tryserver (keys %libserv) {
5227: $alldom{$hostdom{$tryserver}}=1;
5228: }
5229: my $alldomstr='';
5230: foreach (sort keys %alldom) {
5231: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
5232: }
5233: $alldomstr=~s/:$//;
5234: return split(/:/,$alldomstr);
5235: } else {
5236: my @emptyResults = ();
5237: push(@emptyResults, 'missing domain');
5238: return split(':',@emptyResults);
5239: }
5240: }
5241:
5242: # --------------------------------------------- GetFileTimestamp
5243: # This function utilizes dirlist and returns the date stamp for
5244: # when it was last modified. It will also return an error of -1
5245: # if an error occurs
5246:
5247: ##
5248: ## FIXME: This subroutine assumes its caller knows something about the
5249: ## directory structure of the home server for the student ($root).
5250: ## Not a good assumption to make. Since this is for looking up files
5251: ## in user directories, the full path should be constructed by lond, not
5252: ## whatever machine we request data from.
5253: ##
5254: sub GetFileTimestamp {
5255: my ($studentDomain,$studentName,$filename,$root)=@_;
5256: $studentDomain=~s/\W//g;
5257: $studentName=~s/\W//g;
5258: my $subdir=$studentName.'__';
5259: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
5260: my $proname="$studentDomain/$subdir/$studentName";
5261: $proname .= '/'.$filename;
5262: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
5263: $studentName, $root);
5264: my @stats = split('&', $fileStat);
5265: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5266: # @stats contains first the filename, then the stat output
5267: return $stats[10]; # so this is 10 instead of 9.
5268: } else {
5269: return -1;
5270: }
5271: }
5272:
5273: sub stat_file {
5274: my ($uri) = @_;
5275: $uri = &clutter($uri);
5276:
5277: # we want just the url part without the unneeded accessor url bits
5278: if ($uri =~ m-^/adm/-) {
5279: $uri=~s-^/adm/wrapper/-/-;
5280: $uri=~s-^/adm/coursedocs/showdoc/-/-;
5281: }
5282: my ($udom,$uname,$file,$dir);
5283: if ($uri =~ m-^/(uploaded|editupload)/-) {
5284: ($udom,$uname,$file) =
5285: ($uri =~ m-/(?:uploaded|editupload)/?([^/]*)/?([^/]*)/?(.*)-);
5286: $file = 'userfiles/'.$file;
5287: $dir = &propath($udom,$uname);
5288: }
5289: if ($uri =~ m-^/res/-) {
5290: ($udom,$uname) =
5291: ($uri =~ m-/(?:res)/?([^/]*)/?([^/]*)/-);
5292: $file = $uri;
5293: }
5294:
5295: if (!$udom || !$uname || !$file) {
5296: # unable to handle the uri
5297: return ();
5298: }
5299:
5300: my ($result) = &dirlist($file,$udom,$uname,$dir);
5301: my @stats = split('&', $result);
5302:
5303: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
5304: shift(@stats); #filename is first
5305: return @stats;
5306: }
5307: return ();
5308: }
5309:
5310: # -------------------------------------------------------- Value of a Condition
5311:
5312: # gets the value of a specific preevaluated condition
5313: # stored in the string $env{user.state.<cid>}
5314: # or looks up a condition reference in the bighash and if if hasn't
5315: # already been evaluated recurses into docondval to get the value of
5316: # the condition, then memoizing it to
5317: # $env{user.state.<cid>.<condition>}
5318: sub directcondval {
5319: my $number=shift;
5320: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
5321: &Apache::lonuserstate::evalstate();
5322: }
5323: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
5324: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
5325: } elsif ($number =~ /^_/) {
5326: my $sub_condition;
5327: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5328: &GDBM_READER(),0640)) {
5329: $sub_condition=$bighash{'conditions'.$number};
5330: untie(%bighash);
5331: }
5332: my $value = &docondval($sub_condition);
5333: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
5334: return $value;
5335: }
5336: if ($env{'user.state.'.$env{'request.course.id'}}) {
5337: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
5338: } else {
5339: return 2;
5340: }
5341: }
5342:
5343: # get the collection of conditions for this resource
5344: sub condval {
5345: my $condidx=shift;
5346: my $allpathcond='';
5347: foreach my $cond (split(/\|/,$condidx)) {
5348: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
5349: $allpathcond.=
5350: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
5351: }
5352: }
5353: $allpathcond=~s/\|$//;
5354: return &docondval($allpathcond);
5355: }
5356:
5357: #evaluates an expression of conditions
5358: sub docondval {
5359: my ($allpathcond) = @_;
5360: my $result=0;
5361: if ($env{'request.course.id'}
5362: && defined($allpathcond)) {
5363: my $operand='|';
5364: my @stack;
5365: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
5366: if ($chunk eq '(') {
5367: push @stack,($operand,$result);
5368: } elsif ($chunk eq ')') {
5369: my $before=pop @stack;
5370: if (pop @stack eq '&') {
5371: $result=$result>$before?$before:$result;
5372: } else {
5373: $result=$result>$before?$result:$before;
5374: }
5375: } elsif (($chunk eq '&') || ($chunk eq '|')) {
5376: $operand=$chunk;
5377: } else {
5378: my $new=directcondval($chunk);
5379: if ($operand eq '&') {
5380: $result=$result>$new?$new:$result;
5381: } else {
5382: $result=$result>$new?$result:$new;
5383: }
5384: }
5385: }
5386: }
5387: return $result;
5388: }
5389:
5390: # ---------------------------------------------------- Devalidate courseresdata
5391:
5392: sub devalidatecourseresdata {
5393: my ($coursenum,$coursedomain)=@_;
5394: my $hashid=$coursenum.':'.$coursedomain;
5395: &devalidate_cache_new('courseres',$hashid);
5396: }
5397:
5398:
5399: # --------------------------------------------------- Course Resourcedata Query
5400:
5401: sub get_courseresdata {
5402: my ($coursenum,$coursedomain)=@_;
5403: my $coursehom=&homeserver($coursenum,$coursedomain);
5404: my $hashid=$coursenum.':'.$coursedomain;
5405: my ($result,$cached)=&is_cached_new('courseres',$hashid);
5406: my %dumpreply;
5407: unless (defined($cached)) {
5408: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
5409: $result=\%dumpreply;
5410: my ($tmp) = keys(%dumpreply);
5411: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
5412: &do_cache_new('courseres',$hashid,$result,600);
5413: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
5414: return $tmp;
5415: } elsif ($tmp =~ /^(error)/) {
5416: $result=undef;
5417: &do_cache_new('courseres',$hashid,$result,600);
5418: }
5419: }
5420: return $result;
5421: }
5422:
5423: sub devalidateuserresdata {
5424: my ($uname,$udom)=@_;
5425: my $hashid="$udom:$uname";
5426: &devalidate_cache_new('userres',$hashid);
5427: }
5428:
5429: sub get_userresdata {
5430: my ($uname,$udom)=@_;
5431: #most student don\'t have any data set, check if there is some data
5432: if (&EXT_cache_status($udom,$uname)) { return undef; }
5433:
5434: my $hashid="$udom:$uname";
5435: my ($result,$cached)=&is_cached_new('userres',$hashid);
5436: if (!defined($cached)) {
5437: my %resourcedata=&dump('resourcedata',$udom,$uname);
5438: $result=\%resourcedata;
5439: &do_cache_new('userres',$hashid,$result,600);
5440: }
5441: my ($tmp)=keys(%$result);
5442: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
5443: return $result;
5444: }
5445: #error 2 occurs when the .db doesn't exist
5446: if ($tmp!~/error: 2 /) {
5447: &logthis("<font color=\"blue\">WARNING:".
5448: " Trying to get resource data for ".
5449: $uname." at ".$udom.": ".
5450: $tmp."</font>");
5451: } elsif ($tmp=~/error: 2 /) {
5452: #&EXT_cache_set($udom,$uname);
5453: &do_cache_new('userres',$hashid,undef,600);
5454: undef($tmp); # not really an error so don't send it back
5455: }
5456: return $tmp;
5457: }
5458:
5459: sub resdata {
5460: my ($name,$domain,$type,@which)=@_;
5461: my $result;
5462: if ($type eq 'course') {
5463: $result=&get_courseresdata($name,$domain);
5464: } elsif ($type eq 'user') {
5465: $result=&get_userresdata($name,$domain);
5466: }
5467: if (!ref($result)) { return $result; }
5468: foreach my $item (@which) {
5469: if (defined($result->{$item})) {
5470: return $result->{$item};
5471: }
5472: }
5473: return undef;
5474: }
5475:
5476: #
5477: # EXT resource caching routines
5478: #
5479:
5480: sub clear_EXT_cache_status {
5481: &delenv('cache.EXT.');
5482: }
5483:
5484: sub EXT_cache_status {
5485: my ($target_domain,$target_user) = @_;
5486: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5487: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
5488: # We know already the user has no data
5489: return 1;
5490: } else {
5491: return 0;
5492: }
5493: }
5494:
5495: sub EXT_cache_set {
5496: my ($target_domain,$target_user) = @_;
5497: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
5498: #&appenv($cachename => time);
5499: }
5500:
5501: # --------------------------------------------------------- Value of a Variable
5502: sub EXT {
5503:
5504: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
5505: unless ($varname) { return ''; }
5506: #get real user name/domain, courseid and symb
5507: my $courseid;
5508: my $publicuser;
5509: if ($symbparm) {
5510: $symbparm=&get_symb_from_alias($symbparm);
5511: }
5512: if (!($uname && $udom)) {
5513: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
5514: &Apache::lonxml::whichuser($symbparm);
5515: if (!$symbparm) { $symbparm=$cursymb; }
5516: } else {
5517: $courseid=$env{'request.course.id'};
5518: }
5519: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
5520: my $rest;
5521: if (defined($therest[0])) {
5522: $rest=join('.',@therest);
5523: } else {
5524: $rest='';
5525: }
5526:
5527: my $qualifierrest=$qualifier;
5528: if ($rest) { $qualifierrest.='.'.$rest; }
5529: my $spacequalifierrest=$space;
5530: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
5531: if ($realm eq 'user') {
5532: # --------------------------------------------------------------- user.resource
5533: if ($space eq 'resource') {
5534: if ( (defined($Apache::lonhomework::parsing_a_problem)
5535: || defined($Apache::lonhomework::parsing_a_task))
5536: &&
5537: ($symbparm eq &symbread()) ) {
5538: # if we are in the middle of processing the resource the
5539: # get the value we are planning on committing
5540: if (defined($Apache::lonhomework::results{$qualifierrest})) {
5541: return $Apache::lonhomework::results{$qualifierrest};
5542: } else {
5543: return $Apache::lonhomework::history{$qualifierrest};
5544: }
5545: } else {
5546: my %restored;
5547: if ($publicuser || $env{'request.state'} eq 'construct') {
5548: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
5549: } else {
5550: %restored=&restore($symbparm,$courseid,$udom,$uname);
5551: }
5552: return $restored{$qualifierrest};
5553: }
5554: # ----------------------------------------------------------------- user.access
5555: } elsif ($space eq 'access') {
5556: # FIXME - not supporting calls for a specific user
5557: return &allowed($qualifier,$rest);
5558: # ------------------------------------------ user.preferences, user.environment
5559: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
5560: if (($uname eq $env{'user.name'}) &&
5561: ($udom eq $env{'user.domain'})) {
5562: return $env{join('.',('environment',$qualifierrest))};
5563: } else {
5564: my %returnhash;
5565: if (!$publicuser) {
5566: %returnhash=&userenvironment($udom,$uname,
5567: $qualifierrest);
5568: }
5569: return $returnhash{$qualifierrest};
5570: }
5571: # ----------------------------------------------------------------- user.course
5572: } elsif ($space eq 'course') {
5573: # FIXME - not supporting calls for a specific user
5574: return $env{join('.',('request.course',$qualifier))};
5575: # ------------------------------------------------------------------- user.role
5576: } elsif ($space eq 'role') {
5577: # FIXME - not supporting calls for a specific user
5578: my ($role,$where)=split(/\./,$env{'request.role'});
5579: if ($qualifier eq 'value') {
5580: return $role;
5581: } elsif ($qualifier eq 'extent') {
5582: return $where;
5583: }
5584: # ----------------------------------------------------------------- user.domain
5585: } elsif ($space eq 'domain') {
5586: return $udom;
5587: # ------------------------------------------------------------------- user.name
5588: } elsif ($space eq 'name') {
5589: return $uname;
5590: # ---------------------------------------------------- Any other user namespace
5591: } else {
5592: my %reply;
5593: if (!$publicuser) {
5594: %reply=&get($space,[$qualifierrest],$udom,$uname);
5595: }
5596: return $reply{$qualifierrest};
5597: }
5598: } elsif ($realm eq 'query') {
5599: # ---------------------------------------------- pull stuff out of query string
5600: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
5601: [$spacequalifierrest]);
5602: return $env{'form.'.$spacequalifierrest};
5603: } elsif ($realm eq 'request') {
5604: # ------------------------------------------------------------- request.browser
5605: if ($space eq 'browser') {
5606: if ($qualifier eq 'textremote') {
5607: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
5608: return 1;
5609: } else {
5610: return 0;
5611: }
5612: } else {
5613: return $env{'browser.'.$qualifier};
5614: }
5615: # ------------------------------------------------------------ request.filename
5616: } else {
5617: return $env{'request.'.$spacequalifierrest};
5618: }
5619: } elsif ($realm eq 'course') {
5620: # ---------------------------------------------------------- course.description
5621: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
5622: } elsif ($realm eq 'resource') {
5623:
5624: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
5625: if (!$symbparm) { $symbparm=&symbread(); }
5626: }
5627:
5628: if ($space eq 'title') {
5629: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
5630: return &gettitle($symbparm);
5631: }
5632:
5633: if ($space eq 'map') {
5634: my ($map) = &decode_symb($symbparm);
5635: return &symbread($map);
5636: }
5637:
5638: my ($section, $group, @groups);
5639: my ($courselevelm,$courselevel);
5640: if ($symbparm && defined($courseid) &&
5641: $courseid eq $env{'request.course.id'}) {
5642:
5643: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
5644:
5645: # ----------------------------------------------------- Cascading lookup scheme
5646: my $symbp=$symbparm;
5647: my $mapp=&deversion((&decode_symb($symbp))[0]);
5648:
5649: my $symbparm=$symbp.'.'.$spacequalifierrest;
5650: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
5651:
5652: if (($env{'user.name'} eq $uname) &&
5653: ($env{'user.domain'} eq $udom)) {
5654: $section=$env{'request.course.sec'};
5655: @groups = split(/:/,$env{'request.course.groups'});
5656: @groups=&sort_course_groups($courseid,@groups);
5657: } else {
5658: if (! defined($usection)) {
5659: $section=&getsection($udom,$uname,$courseid);
5660: } else {
5661: $section = $usection;
5662: }
5663: @groups = &get_users_groups($udom,$uname,$courseid);
5664: }
5665:
5666: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
5667: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
5668: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
5669:
5670: $courselevel=$courseid.'.'.$spacequalifierrest;
5671: my $courselevelr=$courseid.'.'.$symbparm;
5672: $courselevelm=$courseid.'.'.$mapparm;
5673:
5674: # ----------------------------------------------------------- first, check user
5675:
5676: my $userreply=&resdata($uname,$udom,'user',
5677: ($courselevelr,$courselevelm,
5678: $courselevel));
5679: if (defined($userreply)) { return $userreply; }
5680:
5681: # ------------------------------------------------ second, check some of course
5682: my $coursereply;
5683: if (@groups > 0) {
5684: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
5685: $mapparm,$spacequalifierrest);
5686: if (defined($coursereply)) { return $coursereply; }
5687: }
5688:
5689: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5690: $env{'course.'.$courseid.'.domain'},
5691: 'course',
5692: ($seclevelr,$seclevelm,$seclevel,
5693: $courselevelr));
5694: if (defined($coursereply)) { return $coursereply; }
5695:
5696: # ------------------------------------------------------ third, check map parms
5697: my %parmhash=();
5698: my $thisparm='';
5699: if (tie(%parmhash,'GDBM_File',
5700: $env{'request.course.fn'}.'_parms.db',
5701: &GDBM_READER(),0640)) {
5702: $thisparm=$parmhash{$symbparm};
5703: untie(%parmhash);
5704: }
5705: if ($thisparm) { return $thisparm; }
5706: }
5707: # ------------------------------------------ fourth, look in resource metadata
5708:
5709: $spacequalifierrest=~s/\./\_/;
5710: my $filename;
5711: if (!$symbparm) { $symbparm=&symbread(); }
5712: if ($symbparm) {
5713: $filename=(&decode_symb($symbparm))[2];
5714: } else {
5715: $filename=$env{'request.filename'};
5716: }
5717: my $metadata=&metadata($filename,$spacequalifierrest);
5718: if (defined($metadata)) { return $metadata; }
5719: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
5720: if (defined($metadata)) { return $metadata; }
5721:
5722: # ---------------------------------------------- fourth, look in rest pf course
5723: if ($symbparm && defined($courseid) &&
5724: $courseid eq $env{'request.course.id'}) {
5725: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5726: $env{'course.'.$courseid.'.domain'},
5727: 'course',
5728: ($courselevelm,$courselevel));
5729: if (defined($coursereply)) { return $coursereply; }
5730: }
5731: # ------------------------------------------------------------------ Cascade up
5732: unless ($space eq '0') {
5733: my @parts=split(/_/,$space);
5734: my $id=pop(@parts);
5735: my $part=join('_',@parts);
5736: if ($part eq '') { $part='0'; }
5737: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
5738: $symbparm,$udom,$uname,$section,1);
5739: if (defined($partgeneral)) { return $partgeneral; }
5740: }
5741: if ($recurse) { return undef; }
5742: my $pack_def=&packages_tab_default($filename,$varname);
5743: if (defined($pack_def)) { return $pack_def; }
5744:
5745: # ---------------------------------------------------- Any other user namespace
5746: } elsif ($realm eq 'environment') {
5747: # ----------------------------------------------------------------- environment
5748: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
5749: return $env{'environment.'.$spacequalifierrest};
5750: } else {
5751: if ($uname eq 'anonymous' && $udom eq '') {
5752: return '';
5753: }
5754: my %returnhash=&userenvironment($udom,$uname,
5755: $spacequalifierrest);
5756: return $returnhash{$spacequalifierrest};
5757: }
5758: } elsif ($realm eq 'system') {
5759: # ----------------------------------------------------------------- system.time
5760: if ($space eq 'time') {
5761: return time;
5762: }
5763: } elsif ($realm eq 'server') {
5764: # ----------------------------------------------------------------- system.time
5765: if ($space eq 'name') {
5766: return $ENV{'SERVER_NAME'};
5767: }
5768: }
5769: return '';
5770: }
5771:
5772: sub check_group_parms {
5773: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
5774: my @groupitems = ();
5775: my $resultitem;
5776: my @levels = ($symbparm,$mapparm,$what);
5777: foreach my $group (@{$groups}) {
5778: foreach my $level (@levels) {
5779: my $item = $courseid.'.['.$group.'].'.$level;
5780: push(@groupitems,$item);
5781: }
5782: }
5783: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
5784: $env{'course.'.$courseid.'.domain'},
5785: 'course',@groupitems);
5786: return $coursereply;
5787: }
5788:
5789: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
5790: my ($courseid,@groups) = @_;
5791: @groups = sort(@groups);
5792: return @groups;
5793: }
5794:
5795: sub packages_tab_default {
5796: my ($uri,$varname)=@_;
5797: my (undef,$part,$name)=split(/\./,$varname);
5798:
5799: my (@extension,@specifics,$do_default);
5800: foreach my $package (split(/,/,&metadata($uri,'packages'))) {
5801: my ($pack_type,$pack_part)=split(/_/,$package,2);
5802: if ($pack_type eq 'default') {
5803: $do_default=1;
5804: } elsif ($pack_type eq 'extension') {
5805: push(@extension,[$package,$pack_type,$pack_part]);
5806: } else {
5807: push(@specifics,[$package,$pack_type,$pack_part]);
5808: }
5809: }
5810: # first look for a package that matches the requested part id
5811: foreach my $package (@specifics) {
5812: my (undef,$pack_type,$pack_part)=@{$package};
5813: next if ($pack_part ne $part);
5814: if (defined($packagetab{"$pack_type&$name&default"})) {
5815: return $packagetab{"$pack_type&$name&default"};
5816: }
5817: }
5818: # look for any possible matching non extension_ package
5819: foreach my $package (@specifics) {
5820: my (undef,$pack_type,$pack_part)=@{$package};
5821: if (defined($packagetab{"$pack_type&$name&default"})) {
5822: return $packagetab{"$pack_type&$name&default"};
5823: }
5824: if ($pack_type eq 'part') { $pack_part='0'; }
5825: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
5826: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
5827: }
5828: }
5829: # look for any posible extension_ match
5830: foreach my $package (@extension) {
5831: my ($package,$pack_type)=@{$package};
5832: if (defined($packagetab{"$pack_type&$name&default"})) {
5833: return $packagetab{"$pack_type&$name&default"};
5834: }
5835: if (defined($packagetab{$package."&$name&default"})) {
5836: return $packagetab{$package."&$name&default"};
5837: }
5838: }
5839: # look for a global default setting
5840: if ($do_default && defined($packagetab{"default&$name&default"})) {
5841: return $packagetab{"default&$name&default"};
5842: }
5843: return undef;
5844: }
5845:
5846: sub add_prefix_and_part {
5847: my ($prefix,$part)=@_;
5848: my $keyroot;
5849: if (defined($prefix) && $prefix !~ /^__/) {
5850: # prefix that has a part already
5851: $keyroot=$prefix;
5852: } elsif (defined($prefix)) {
5853: # prefix that is missing a part
5854: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
5855: } else {
5856: # no prefix at all
5857: if (defined($part)) { $keyroot='_'.$part; }
5858: }
5859: return $keyroot;
5860: }
5861:
5862: # ---------------------------------------------------------------- Get metadata
5863:
5864: my %metaentry;
5865: sub metadata {
5866: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
5867: $uri=&declutter($uri);
5868: # if it is a non metadata possible uri return quickly
5869: if (($uri eq '') ||
5870: (($uri =~ m|^/*adm/|) &&
5871: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
5872: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
5873: ($uri =~ m|home/[^/]+/public_html/|)) {
5874: return undef;
5875: }
5876: my $filename=$uri;
5877: $uri=~s/\.meta$//;
5878: #
5879: # Is the metadata already cached?
5880: # Look at timestamp of caching
5881: # Everything is cached by the main uri, libraries are never directly cached
5882: #
5883: if (!defined($liburi)) {
5884: my ($result,$cached)=&is_cached_new('meta',$uri);
5885: if (defined($cached)) { return $result->{':'.$what}; }
5886: }
5887: {
5888: #
5889: # Is this a recursive call for a library?
5890: #
5891: # if (! exists($metacache{$uri})) {
5892: # $metacache{$uri}={};
5893: # }
5894: if ($liburi) {
5895: $liburi=&declutter($liburi);
5896: $filename=$liburi;
5897: } else {
5898: &devalidate_cache_new('meta',$uri);
5899: undef(%metaentry);
5900: }
5901: my %metathesekeys=();
5902: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
5903: my $metastring;
5904: if ($uri !~ m -^(editupload)/-) {
5905: my $file=&filelocation('',&clutter($filename));
5906: #push(@{$metaentry{$uri.'.file'}},$file);
5907: $metastring=&getfile($file);
5908: }
5909: my $parser=HTML::LCParser->new(\$metastring);
5910: my $token;
5911: undef %metathesekeys;
5912: while ($token=$parser->get_token) {
5913: if ($token->[0] eq 'S') {
5914: if (defined($token->[2]->{'package'})) {
5915: #
5916: # This is a package - get package info
5917: #
5918: my $package=$token->[2]->{'package'};
5919: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5920: if (defined($token->[2]->{'id'})) {
5921: $keyroot.='_'.$token->[2]->{'id'};
5922: }
5923: if ($metaentry{':packages'}) {
5924: $metaentry{':packages'}.=','.$package.$keyroot;
5925: } else {
5926: $metaentry{':packages'}=$package.$keyroot;
5927: }
5928: foreach my $pack_entry (keys(%packagetab)) {
5929: my $part=$keyroot;
5930: $part=~s/^\_//;
5931: if ($pack_entry=~/^\Q$package\E\&/ ||
5932: $pack_entry=~/^\Q$package\E_0\&/) {
5933: my ($pack,$name,$subp)=split(/\&/,$pack_entry);
5934: # ignore package.tab specified default values
5935: # here &package_tab_default() will fetch those
5936: if ($subp eq 'default') { next; }
5937: my $value=$packagetab{$pack_entry};
5938: my $unikey;
5939: if ($pack =~ /_0$/) {
5940: $unikey='parameter_0_'.$name;
5941: $part=0;
5942: } else {
5943: $unikey='parameter'.$keyroot.'_'.$name;
5944: }
5945: if ($subp eq 'display') {
5946: $value.=' [Part: '.$part.']';
5947: }
5948: $metaentry{':'.$unikey.'.part'}=$part;
5949: $metathesekeys{$unikey}=1;
5950: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5951: $metaentry{':'.$unikey.'.'.$subp}=$value;
5952: }
5953: if (defined($metaentry{':'.$unikey.'.default'})) {
5954: $metaentry{':'.$unikey}=
5955: $metaentry{':'.$unikey.'.default'};
5956: }
5957: }
5958: }
5959: } else {
5960: #
5961: # This is not a package - some other kind of start tag
5962: #
5963: my $entry=$token->[1];
5964: my $unikey;
5965: if ($entry eq 'import') {
5966: $unikey='';
5967: } else {
5968: $unikey=$entry;
5969: }
5970: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5971:
5972: if (defined($token->[2]->{'id'})) {
5973: $unikey.='_'.$token->[2]->{'id'};
5974: }
5975:
5976: if ($entry eq 'import') {
5977: #
5978: # Importing a library here
5979: #
5980: if ($depthcount<20) {
5981: my $location=$parser->get_text('/import');
5982: my $dir=$filename;
5983: $dir=~s|[^/]*$||;
5984: $location=&filelocation($dir,$location);
5985: my $metadata =
5986: &metadata($uri,'keys', $location,$unikey,
5987: $depthcount+1);
5988: foreach my $meta (split(',',$metadata)) {
5989: $metaentry{':'.$meta}=$metaentry{':'.$meta};
5990: $metathesekeys{$meta}=1;
5991: }
5992: }
5993: } else {
5994:
5995: if (defined($token->[2]->{'name'})) {
5996: $unikey.='_'.$token->[2]->{'name'};
5997: }
5998: $metathesekeys{$unikey}=1;
5999: foreach my $param (@{$token->[3]}) {
6000: $metaentry{':'.$unikey.'.'.$param} =
6001: $token->[2]->{$param};
6002: }
6003: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
6004: my $default=$metaentry{':'.$unikey.'.default'};
6005: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
6006: # only ws inside the tag, and not in default, so use default
6007: # as value
6008: $metaentry{':'.$unikey}=$default;
6009: } else {
6010: # either something interesting inside the tag or default
6011: # uninteresting
6012: $metaentry{':'.$unikey}=$internaltext;
6013: }
6014: # end of not-a-package not-a-library import
6015: }
6016: # end of not-a-package start tag
6017: }
6018: # the next is the end of "start tag"
6019: }
6020: }
6021: my ($extension) = ($uri =~ /\.(\w+)$/);
6022: foreach my $key (keys(%packagetab)) {
6023: #no specific packages #how's our extension
6024: if ($key!~/^extension_\Q$extension\E&/) { next; }
6025: &metadata_create_package_def($uri,$key,'extension_'.$extension,
6026: \%metathesekeys);
6027: }
6028: if (!exists($metaentry{':packages'})) {
6029: foreach my $key (keys(%packagetab)) {
6030: #no specific packages well let's get default then
6031: if ($key!~/^default&/) { next; }
6032: &metadata_create_package_def($uri,$key,'default',
6033: \%metathesekeys);
6034: }
6035: }
6036: # are there custom rights to evaluate
6037: if ($metaentry{':copyright'} eq 'custom') {
6038:
6039: #
6040: # Importing a rights file here
6041: #
6042: unless ($depthcount) {
6043: my $location=$metaentry{':customdistributionfile'};
6044: my $dir=$filename;
6045: $dir=~s|[^/]*$||;
6046: $location=&filelocation($dir,$location);
6047: my $rights_metadata =
6048: &metadata($uri,'keys',$location,'_rights',
6049: $depthcount+1);
6050: foreach my $rights (split(',',$rights_metadata)) {
6051: #$metaentry{':'.$rights}=$metacache{$uri}->{':'.$rights};
6052: $metathesekeys{$rights}=1;
6053: }
6054: }
6055: }
6056: # uniqifiy package listing
6057: my %seen;
6058: my @uniq_packages =
6059: grep { ! $seen{$_} ++ } (split(',',$metaentry{':packages'}));
6060: $metaentry{':packages'} = join(',',@uniq_packages);
6061:
6062: $metaentry{':keys'} = join(',',keys(%metathesekeys));
6063: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
6064: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
6065: &do_cache_new('meta',$uri,\%metaentry,60*60);
6066: # this is the end of "was not already recently cached
6067: }
6068: return $metaentry{':'.$what};
6069: }
6070:
6071: sub metadata_create_package_def {
6072: my ($uri,$key,$package,$metathesekeys)=@_;
6073: my ($pack,$name,$subp)=split(/\&/,$key);
6074: if ($subp eq 'default') { next; }
6075:
6076: if (defined($metaentry{':packages'})) {
6077: $metaentry{':packages'}.=','.$package;
6078: } else {
6079: $metaentry{':packages'}=$package;
6080: }
6081: my $value=$packagetab{$key};
6082: my $unikey;
6083: $unikey='parameter_0_'.$name;
6084: $metaentry{':'.$unikey.'.part'}=0;
6085: $$metathesekeys{$unikey}=1;
6086: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
6087: $metaentry{':'.$unikey.'.'.$subp}=$value;
6088: }
6089: if (defined($metaentry{':'.$unikey.'.default'})) {
6090: $metaentry{':'.$unikey}=
6091: $metaentry{':'.$unikey.'.default'};
6092: }
6093: }
6094:
6095: sub metadata_generate_part0 {
6096: my ($metadata,$metacache,$uri) = @_;
6097: my %allnames;
6098: foreach my $metakey (keys(%$metadata)) {
6099: if ($metakey=~/^parameter\_(.*)/) {
6100: my $part=$$metacache{':'.$metakey.'.part'};
6101: my $name=$$metacache{':'.$metakey.'.name'};
6102: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
6103: $allnames{$name}=$part;
6104: }
6105: }
6106: }
6107: foreach my $name (keys(%allnames)) {
6108: $$metadata{"parameter_0_$name"}=1;
6109: my $key=":parameter_0_$name";
6110: $$metacache{"$key.part"}='0';
6111: $$metacache{"$key.name"}=$name;
6112: $$metacache{"$key.type"}=$$metacache{':parameter_'.
6113: $allnames{$name}.'_'.$name.
6114: '.type'};
6115: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
6116: '.display'};
6117: my $expr='[Part: '.$allnames{$name}.']';
6118: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
6119: $$metacache{"$key.display"}=$olddis;
6120: }
6121: }
6122:
6123: # ------------------------------------------------------ Devalidate title cache
6124:
6125: sub devalidate_title_cache {
6126: my ($url)=@_;
6127: if (!$env{'request.course.id'}) { return; }
6128: my $symb=&symbread($url);
6129: if (!$symb) { return; }
6130: my $key=$env{'request.course.id'}."\0".$symb;
6131: &devalidate_cache_new('title',$key);
6132: }
6133:
6134: # ------------------------------------------------- Get the title of a resource
6135:
6136: sub gettitle {
6137: my $urlsymb=shift;
6138: my $symb=&symbread($urlsymb);
6139: if ($symb) {
6140: my $key=$env{'request.course.id'}."\0".$symb;
6141: my ($result,$cached)=&is_cached_new('title',$key);
6142: if (defined($cached)) {
6143: return $result;
6144: }
6145: my ($map,$resid,$url)=&decode_symb($symb);
6146: my $title='';
6147: my %bighash;
6148: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6149: &GDBM_READER(),0640)) {
6150: my $mapid=$bighash{'map_pc_'.&clutter($map)};
6151: $title=$bighash{'title_'.$mapid.'.'.$resid};
6152: untie %bighash;
6153: }
6154: $title=~s/\&colon\;/\:/gs;
6155: if ($title) {
6156: return &do_cache_new('title',$key,$title,600);
6157: }
6158: $urlsymb=$url;
6159: }
6160: my $title=&metadata($urlsymb,'title');
6161: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
6162: return $title;
6163: }
6164:
6165: sub get_slot {
6166: my ($which,$cnum,$cdom)=@_;
6167: if (!$cnum || !$cdom) {
6168: (undef,my $courseid)=&Apache::lonxml::whichuser();
6169: $cdom=$env{'course.'.$courseid.'.domain'};
6170: $cnum=$env{'course.'.$courseid.'.num'};
6171: }
6172: my $key=join("\0",'slots',$cdom,$cnum,$which);
6173: my %slotinfo;
6174: if (exists($remembered{$key})) {
6175: $slotinfo{$which} = $remembered{$key};
6176: } else {
6177: %slotinfo=&get('slots',[$which],$cdom,$cnum);
6178: &Apache::lonhomework::showhash(%slotinfo);
6179: my ($tmp)=keys(%slotinfo);
6180: if ($tmp=~/^error:/) { return (); }
6181: $remembered{$key} = $slotinfo{$which};
6182: }
6183: if (ref($slotinfo{$which}) eq 'HASH') {
6184: return %{$slotinfo{$which}};
6185: }
6186: return $slotinfo{$which};
6187: }
6188: # ------------------------------------------------- Update symbolic store links
6189:
6190: sub symblist {
6191: my ($mapname,%newhash)=@_;
6192: $mapname=&deversion(&declutter($mapname));
6193: my %hash;
6194: if (($env{'request.course.fn'}) && (%newhash)) {
6195: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6196: &GDBM_WRCREAT(),0640)) {
6197: foreach my $url (keys %newhash) {
6198: next if ($url eq 'last_known'
6199: && $env{'form.no_update_last_known'});
6200: $hash{declutter($url)}=&encode_symb($mapname,
6201: $newhash{$url}->[1],
6202: $newhash{$url}->[0]);
6203: }
6204: if (untie(%hash)) {
6205: return 'ok';
6206: }
6207: }
6208: }
6209: return 'error';
6210: }
6211:
6212: # --------------------------------------------------------------- Verify a symb
6213:
6214: sub symbverify {
6215: my ($symb,$thisurl)=@_;
6216: my $thisfn=$thisurl;
6217: # wrapper not part of symbs
6218: $thisfn=~s/^\/adm\/wrapper//;
6219: $thisfn=~s/^\/adm\/coursedocs\/showdoc\///;
6220: $thisfn=&declutter($thisfn);
6221: # direct jump to resource in page or to a sequence - will construct own symbs
6222: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
6223: # check URL part
6224: my ($map,$resid,$url)=&decode_symb($symb);
6225:
6226: unless ($url eq $thisfn) { return 0; }
6227:
6228: $symb=&symbclean($symb);
6229: $thisurl=&deversion($thisurl);
6230: $thisfn=&deversion($thisfn);
6231:
6232: my %bighash;
6233: my $okay=0;
6234:
6235: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6236: &GDBM_READER(),0640)) {
6237: my $ids=$bighash{'ids_'.&clutter($thisurl)};
6238: unless ($ids) {
6239: $ids=$bighash{'ids_/'.$thisurl};
6240: }
6241: if ($ids) {
6242: # ------------------------------------------------------------------- Has ID(s)
6243: foreach (split(/\,/,$ids)) {
6244: my ($mapid,$resid)=split(/\./,$_);
6245: if (
6246: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
6247: eq $symb) {
6248: if (($env{'request.role.adv'}) ||
6249: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
6250: $okay=1;
6251: }
6252: }
6253: }
6254: }
6255: untie(%bighash);
6256: }
6257: return $okay;
6258: }
6259:
6260: # --------------------------------------------------------------- Clean-up symb
6261:
6262: sub symbclean {
6263: my $symb=shift;
6264: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6265: # remove version from map
6266: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
6267:
6268: # remove version from URL
6269: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
6270:
6271: # remove wrapper
6272:
6273: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
6274: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
6275: return $symb;
6276: }
6277:
6278: # ---------------------------------------------- Split symb to find map and url
6279:
6280: sub encode_symb {
6281: my ($map,$resid,$url)=@_;
6282: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
6283: }
6284:
6285: sub decode_symb {
6286: my $symb=shift;
6287: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
6288: my ($map,$resid,$url)=split(/___/,$symb);
6289: return (&fixversion($map),$resid,&fixversion($url));
6290: }
6291:
6292: sub fixversion {
6293: my $fn=shift;
6294: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
6295: my %bighash;
6296: my $uri=&clutter($fn);
6297: my $key=$env{'request.course.id'}.'_'.$uri;
6298: # is this cached?
6299: my ($result,$cached)=&is_cached_new('courseresversion',$key);
6300: if (defined($cached)) { return $result; }
6301: # unfortunately not cached, or expired
6302: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6303: &GDBM_READER(),0640)) {
6304: if ($bighash{'version_'.$uri}) {
6305: my $version=$bighash{'version_'.$uri};
6306: unless (($version eq 'mostrecent') ||
6307: ($version==&getversion($uri))) {
6308: $uri=~s/\.(\w+)$/\.$version\.$1/;
6309: }
6310: }
6311: untie %bighash;
6312: }
6313: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
6314: }
6315:
6316: sub deversion {
6317: my $url=shift;
6318: $url=~s/\.\d+\.(\w+)$/\.$1/;
6319: return $url;
6320: }
6321:
6322: # ------------------------------------------------------ Return symb list entry
6323:
6324: sub symbread {
6325: my ($thisfn,$donotrecurse)=@_;
6326: my $cache_str='request.symbread.cached.'.$thisfn;
6327: if (defined($env{$cache_str})) { return $env{$cache_str}; }
6328: # no filename provided? try from environment
6329: unless ($thisfn) {
6330: if ($env{'request.symb'}) {
6331: return $env{$cache_str}=&symbclean($env{'request.symb'});
6332: }
6333: $thisfn=$env{'request.filename'};
6334: }
6335: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6336: # is that filename actually a symb? Verify, clean, and return
6337: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
6338: if (&symbverify($thisfn,$1)) {
6339: return $env{$cache_str}=&symbclean($thisfn);
6340: }
6341: }
6342: $thisfn=declutter($thisfn);
6343: my %hash;
6344: my %bighash;
6345: my $syval='';
6346: if (($env{'request.course.fn'}) && ($thisfn)) {
6347: my $targetfn = $thisfn;
6348: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
6349: $targetfn = 'adm/wrapper/'.$thisfn;
6350: }
6351: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
6352: $targetfn=$1;
6353: }
6354: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
6355: &GDBM_READER(),0640)) {
6356: $syval=$hash{$targetfn};
6357: untie(%hash);
6358: }
6359: # ---------------------------------------------------------- There was an entry
6360: if ($syval) {
6361: #unless ($syval=~/\_\d+$/) {
6362: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
6363: #&appenv('request.ambiguous' => $thisfn);
6364: #return $env{$cache_str}='';
6365: #}
6366: #$syval.=$1;
6367: #}
6368: } else {
6369: # ------------------------------------------------------- Was not in symb table
6370: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
6371: &GDBM_READER(),0640)) {
6372: # ---------------------------------------------- Get ID(s) for current resource
6373: my $ids=$bighash{'ids_'.&clutter($thisfn)};
6374: unless ($ids) {
6375: $ids=$bighash{'ids_/'.$thisfn};
6376: }
6377: unless ($ids) {
6378: # alias?
6379: $ids=$bighash{'mapalias_'.$thisfn};
6380: }
6381: if ($ids) {
6382: # ------------------------------------------------------------------- Has ID(s)
6383: my @possibilities=split(/\,/,$ids);
6384: if ($#possibilities==0) {
6385: # ----------------------------------------------- There is only one possibility
6386: my ($mapid,$resid)=split(/\./,$ids);
6387: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6388: $resid,$thisfn);
6389: } elsif (!$donotrecurse) {
6390: # ------------------------------------------ There is more than one possibility
6391: my $realpossible=0;
6392: foreach (@possibilities) {
6393: my $file=$bighash{'src_'.$_};
6394: if (&allowed('bre',$file)) {
6395: my ($mapid,$resid)=split(/\./,$_);
6396: if ($bighash{'map_type_'.$mapid} ne 'page') {
6397: $realpossible++;
6398: $syval=&encode_symb($bighash{'map_id_'.$mapid},
6399: $resid,$thisfn);
6400: }
6401: }
6402: }
6403: if ($realpossible!=1) { $syval=''; }
6404: } else {
6405: $syval='';
6406: }
6407: }
6408: untie(%bighash)
6409: }
6410: }
6411: if ($syval) {
6412: return $env{$cache_str}=$syval;
6413: }
6414: }
6415: &appenv('request.ambiguous' => $thisfn);
6416: return $env{$cache_str}='';
6417: }
6418:
6419: # ---------------------------------------------------------- Return random seed
6420:
6421: sub numval {
6422: my $txt=shift;
6423: $txt=~tr/A-J/0-9/;
6424: $txt=~tr/a-j/0-9/;
6425: $txt=~tr/K-T/0-9/;
6426: $txt=~tr/k-t/0-9/;
6427: $txt=~tr/U-Z/0-5/;
6428: $txt=~tr/u-z/0-5/;
6429: $txt=~s/\D//g;
6430: if ($_64bit) { if ($txt > 2**32) { return -1; } }
6431: return int($txt);
6432: }
6433:
6434: sub numval2 {
6435: my $txt=shift;
6436: $txt=~tr/A-J/0-9/;
6437: $txt=~tr/a-j/0-9/;
6438: $txt=~tr/K-T/0-9/;
6439: $txt=~tr/k-t/0-9/;
6440: $txt=~tr/U-Z/0-5/;
6441: $txt=~tr/u-z/0-5/;
6442: $txt=~s/\D//g;
6443: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6444: my $total;
6445: foreach my $val (@txts) { $total+=$val; }
6446: if ($_64bit) { if ($total > 2**32) { return -1; } }
6447: return int($total);
6448: }
6449:
6450: sub numval3 {
6451: use integer;
6452: my $txt=shift;
6453: $txt=~tr/A-J/0-9/;
6454: $txt=~tr/a-j/0-9/;
6455: $txt=~tr/K-T/0-9/;
6456: $txt=~tr/k-t/0-9/;
6457: $txt=~tr/U-Z/0-5/;
6458: $txt=~tr/u-z/0-5/;
6459: $txt=~s/\D//g;
6460: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
6461: my $total;
6462: foreach my $val (@txts) { $total+=$val; }
6463: if ($_64bit) { $total=(($total<<32)>>32); }
6464: return $total;
6465: }
6466:
6467: sub digest {
6468: my ($data)=@_;
6469: my $digest=&Digest::MD5::md5($data);
6470: my ($a,$b,$c,$d)=unpack("iiii",$digest);
6471: my ($e,$f);
6472: {
6473: use integer;
6474: $e=($a+$b);
6475: $f=($c+$d);
6476: if ($_64bit) {
6477: $e=(($e<<32)>>32);
6478: $f=(($f<<32)>>32);
6479: }
6480: }
6481: if (wantarray) {
6482: return ($e,$f);
6483: } else {
6484: my $g;
6485: {
6486: use integer;
6487: $g=($e+$f);
6488: if ($_64bit) {
6489: $g=(($g<<32)>>32);
6490: }
6491: }
6492: return $g;
6493: }
6494: }
6495:
6496: sub latest_rnd_algorithm_id {
6497: return '64bit5';
6498: }
6499:
6500: sub get_rand_alg {
6501: my ($courseid)=@_;
6502: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
6503: if ($courseid) {
6504: return $env{"course.$courseid.rndseed"};
6505: }
6506: return &latest_rnd_algorithm_id();
6507: }
6508:
6509: sub validCODE {
6510: my ($CODE)=@_;
6511: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
6512: return 0;
6513: }
6514:
6515: sub getCODE {
6516: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
6517: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
6518: defined($Apache::lonhomework::parsing_a_task) ) &&
6519: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
6520: return $Apache::lonhomework::history{'resource.CODE'};
6521: }
6522: return undef;
6523: }
6524:
6525: sub rndseed {
6526: my ($symb,$courseid,$domain,$username)=@_;
6527:
6528: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
6529: if (!$symb) {
6530: unless ($symb=$wsymb) { return time; }
6531: }
6532: if (!$courseid) { $courseid=$wcourseid; }
6533: if (!$domain) { $domain=$wdomain; }
6534: if (!$username) { $username=$wusername }
6535: my $which=&get_rand_alg();
6536: if (defined(&getCODE())) {
6537: if ($which eq '64bit5') {
6538: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
6539: } elsif ($which eq '64bit4') {
6540: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
6541: } else {
6542: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
6543: }
6544: } elsif ($which eq '64bit5') {
6545: return &rndseed_64bit5($symb,$courseid,$domain,$username);
6546: } elsif ($which eq '64bit4') {
6547: return &rndseed_64bit4($symb,$courseid,$domain,$username);
6548: } elsif ($which eq '64bit3') {
6549: return &rndseed_64bit3($symb,$courseid,$domain,$username);
6550: } elsif ($which eq '64bit2') {
6551: return &rndseed_64bit2($symb,$courseid,$domain,$username);
6552: } elsif ($which eq '64bit') {
6553: return &rndseed_64bit($symb,$courseid,$domain,$username);
6554: }
6555: return &rndseed_32bit($symb,$courseid,$domain,$username);
6556: }
6557:
6558: sub rndseed_32bit {
6559: my ($symb,$courseid,$domain,$username)=@_;
6560: {
6561: use integer;
6562: my $symbchck=unpack("%32C*",$symb) << 27;
6563: my $symbseed=numval($symb) << 22;
6564: my $namechck=unpack("%32C*",$username) << 17;
6565: my $nameseed=numval($username) << 12;
6566: my $domainseed=unpack("%32C*",$domain) << 7;
6567: my $courseseed=unpack("%32C*",$courseid);
6568: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
6569: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6570: #&Apache::lonxml::debug("rndseed :$num:$symb");
6571: if ($_64bit) { $num=(($num<<32)>>32); }
6572: return $num;
6573: }
6574: }
6575:
6576: sub rndseed_64bit {
6577: my ($symb,$courseid,$domain,$username)=@_;
6578: {
6579: use integer;
6580: my $symbchck=unpack("%32S*",$symb) << 21;
6581: my $symbseed=numval($symb) << 10;
6582: my $namechck=unpack("%32S*",$username);
6583:
6584: my $nameseed=numval($username) << 21;
6585: my $domainseed=unpack("%32S*",$domain) << 10;
6586: my $courseseed=unpack("%32S*",$courseid);
6587:
6588: my $num1=$symbchck+$symbseed+$namechck;
6589: my $num2=$nameseed+$domainseed+$courseseed;
6590: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6591: #&Apache::lonxml::debug("rndseed :$num:$symb");
6592: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6593: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6594: return "$num1,$num2";
6595: }
6596: }
6597:
6598: sub rndseed_64bit2 {
6599: my ($symb,$courseid,$domain,$username)=@_;
6600: {
6601: use integer;
6602: # strings need to be an even # of cahracters long, it it is odd the
6603: # last characters gets thrown away
6604: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6605: my $symbseed=numval($symb) << 10;
6606: my $namechck=unpack("%32S*",$username.' ');
6607:
6608: my $nameseed=numval($username) << 21;
6609: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6610: my $courseseed=unpack("%32S*",$courseid.' ');
6611:
6612: my $num1=$symbchck+$symbseed+$namechck;
6613: my $num2=$nameseed+$domainseed+$courseseed;
6614: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6615: #&Apache::lonxml::debug("rndseed :$num:$symb");
6616: return "$num1,$num2";
6617: }
6618: }
6619:
6620: sub rndseed_64bit3 {
6621: my ($symb,$courseid,$domain,$username)=@_;
6622: {
6623: use integer;
6624: # strings need to be an even # of cahracters long, it it is odd the
6625: # last characters gets thrown away
6626: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6627: my $symbseed=numval2($symb) << 10;
6628: my $namechck=unpack("%32S*",$username.' ');
6629:
6630: my $nameseed=numval2($username) << 21;
6631: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6632: my $courseseed=unpack("%32S*",$courseid.' ');
6633:
6634: my $num1=$symbchck+$symbseed+$namechck;
6635: my $num2=$nameseed+$domainseed+$courseseed;
6636: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6637: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
6638: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6639:
6640: return "$num1:$num2";
6641: }
6642: }
6643:
6644: sub rndseed_64bit4 {
6645: my ($symb,$courseid,$domain,$username)=@_;
6646: {
6647: use integer;
6648: # strings need to be an even # of cahracters long, it it is odd the
6649: # last characters gets thrown away
6650: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6651: my $symbseed=numval3($symb) << 10;
6652: my $namechck=unpack("%32S*",$username.' ');
6653:
6654: my $nameseed=numval3($username) << 21;
6655: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6656: my $courseseed=unpack("%32S*",$courseid.' ');
6657:
6658: my $num1=$symbchck+$symbseed+$namechck;
6659: my $num2=$nameseed+$domainseed+$courseseed;
6660: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6661: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
6662: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6663:
6664: return "$num1:$num2";
6665: }
6666: }
6667:
6668: sub rndseed_64bit5 {
6669: my ($symb,$courseid,$domain,$username)=@_;
6670: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
6671: return "$num1:$num2";
6672: }
6673:
6674: sub rndseed_CODE_64bit {
6675: my ($symb,$courseid,$domain,$username)=@_;
6676: {
6677: use integer;
6678: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6679: my $symbseed=numval2($symb);
6680: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6681: my $CODEseed=numval(&getCODE());
6682: my $courseseed=unpack("%32S*",$courseid.' ');
6683: my $num1=$symbseed+$CODEchck;
6684: my $num2=$CODEseed+$courseseed+$symbchck;
6685: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6686: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
6687: if ($_64bit) { $num1=(($num1<<32)>>32); }
6688: if ($_64bit) { $num2=(($num2<<32)>>32); }
6689: return "$num1:$num2";
6690: }
6691: }
6692:
6693: sub rndseed_CODE_64bit4 {
6694: my ($symb,$courseid,$domain,$username)=@_;
6695: {
6696: use integer;
6697: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6698: my $symbseed=numval3($symb);
6699: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6700: my $CODEseed=numval3(&getCODE());
6701: my $courseseed=unpack("%32S*",$courseid.' ');
6702: my $num1=$symbseed+$CODEchck;
6703: my $num2=$CODEseed+$courseseed+$symbchck;
6704: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6705: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
6706: if ($_64bit) { $num1=(($num1<<32)>>32); }
6707: if ($_64bit) { $num2=(($num2<<32)>>32); }
6708: return "$num1:$num2";
6709: }
6710: }
6711:
6712: sub rndseed_CODE_64bit5 {
6713: my ($symb,$courseid,$domain,$username)=@_;
6714: my $code = &getCODE();
6715: my ($num1,$num2)=&digest("$symb,$courseid,$code");
6716: return "$num1:$num2";
6717: }
6718:
6719: sub setup_random_from_rndseed {
6720: my ($rndseed)=@_;
6721: if ($rndseed =~/([,:])/) {
6722: my ($num1,$num2)=split(/[,:]/,$rndseed);
6723: &Math::Random::random_set_seed(abs($num1),abs($num2));
6724: } else {
6725: &Math::Random::random_set_seed_from_phrase($rndseed);
6726: }
6727: }
6728:
6729: sub latest_receipt_algorithm_id {
6730: return 'receipt2';
6731: }
6732:
6733: sub recunique {
6734: my $fucourseid=shift;
6735: my $unique;
6736: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6737: $unique=$env{"course.$fucourseid.internal.encseed"};
6738: } else {
6739: $unique=$perlvar{'lonReceipt'};
6740: }
6741: return unpack("%32C*",$unique);
6742: }
6743:
6744: sub recprefix {
6745: my $fucourseid=shift;
6746: my $prefix;
6747: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6748: $prefix=$env{"course.$fucourseid.internal.encpref"};
6749: } else {
6750: $prefix=$perlvar{'lonHostID'};
6751: }
6752: return unpack("%32C*",$prefix);
6753: }
6754:
6755: sub ireceipt {
6756: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
6757: my $cuname=unpack("%32C*",$funame);
6758: my $cudom=unpack("%32C*",$fudom);
6759: my $cucourseid=unpack("%32C*",$fucourseid);
6760: my $cusymb=unpack("%32C*",$fusymb);
6761: my $cunique=&recunique($fucourseid);
6762: my $cpart=unpack("%32S*",$part);
6763: my $return =&recprefix($fucourseid).'-';
6764: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
6765: $env{'request.state'} eq 'construct') {
6766: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
6767: " and ".($cpart%$cudom));
6768:
6769: $return.= ($cunique%$cuname+
6770: $cunique%$cudom+
6771: $cusymb%$cuname+
6772: $cusymb%$cudom+
6773: $cucourseid%$cuname+
6774: $cucourseid%$cudom+
6775: $cpart%$cuname+
6776: $cpart%$cudom);
6777: } else {
6778: $return.= ($cunique%$cuname+
6779: $cunique%$cudom+
6780: $cusymb%$cuname+
6781: $cusymb%$cudom+
6782: $cucourseid%$cuname+
6783: $cucourseid%$cudom);
6784: }
6785: return $return;
6786: }
6787:
6788: sub receipt {
6789: my ($part)=@_;
6790: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
6791: return &ireceipt($name,$domain,$courseid,$symb,$part);
6792: }
6793:
6794: # ------------------------------------------------------------ Serves up a file
6795: # returns either the contents of the file or
6796: # -1 if the file doesn't exist
6797: #
6798: # if the target is a file that was uploaded via DOCS,
6799: # a check will be made to see if a current copy exists on the local server,
6800: # if it does this will be served, otherwise a copy will be retrieved from
6801: # the home server for the course and stored in /home/httpd/html/userfiles on
6802: # the local server.
6803:
6804: sub getfile {
6805: my ($file) = @_;
6806: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6807: &repcopy($file);
6808: return &readfile($file);
6809: }
6810:
6811: sub repcopy_userfile {
6812: my ($file)=@_;
6813: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6814: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
6815: my ($cdom,$cnum,$filename) =
6816: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
6817: my ($info,$rtncode);
6818: my $uri="/uploaded/$cdom/$cnum/$filename";
6819: if (-e "$file") {
6820: my @fileinfo = stat($file);
6821: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
6822: if ($lwpresp ne 'ok') {
6823: if ($rtncode eq '404') {
6824: unlink($file);
6825: }
6826: #my $ua=new LWP::UserAgent;
6827: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6828: #my $response=$ua->request($request);
6829: #if ($response->is_success()) {
6830: # return $response->content;
6831: # } else {
6832: # return -1;
6833: # }
6834: return -1;
6835: }
6836: if ($info < $fileinfo[9]) {
6837: return 'ok';
6838: }
6839: $info = '';
6840: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6841: if ($lwpresp ne 'ok') {
6842: return -1;
6843: }
6844: } else {
6845: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6846: if ($lwpresp ne 'ok') {
6847: my $ua=new LWP::UserAgent;
6848: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6849: my $response=$ua->request($request);
6850: if ($response->is_success()) {
6851: $info=$response->content;
6852: } else {
6853: return -1;
6854: }
6855: }
6856: my @parts = ($cdom,$cnum);
6857: if ($filename =~ m|^(.+)/[^/]+$|) {
6858: push @parts, split(/\//,$1);
6859: }
6860: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
6861: foreach my $part (@parts) {
6862: $path .= '/'.$part;
6863: if (!-e $path) {
6864: mkdir($path,0770);
6865: }
6866: }
6867: }
6868: open(FILE,">$file");
6869: print FILE $info;
6870: close(FILE);
6871: return 'ok';
6872: }
6873:
6874: sub tokenwrapper {
6875: my $uri=shift;
6876: $uri=~s|^http\://([^/]+)||;
6877: $uri=~s|^/||;
6878: $env{'user.environment'}=~/\/([^\/]+)\.id/;
6879: my $token=$1;
6880: my (undef,$udom,$uname,$file)=split('/',$uri,4);
6881: if ($udom && $uname && $file) {
6882: $file=~s|(\?\.*)*$||;
6883: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
6884: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
6885: (($uri=~/\?/)?'&':'?').'token='.$token.
6886: '&tokenissued='.$perlvar{'lonHostID'};
6887: } else {
6888: return '/adm/notfound.html';
6889: }
6890: }
6891:
6892: sub getuploaded {
6893: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
6894: $uri=~s/^\///;
6895: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
6896: my $ua=new LWP::UserAgent;
6897: my $request=new HTTP::Request($reqtype,$uri);
6898: my $response=$ua->request($request);
6899: $$rtncode = $response->code;
6900: if (! $response->is_success()) {
6901: return 'failed';
6902: }
6903: if ($reqtype eq 'HEAD') {
6904: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
6905: } elsif ($reqtype eq 'GET') {
6906: $$info = $response->content;
6907: }
6908: return 'ok';
6909: }
6910:
6911: sub readfile {
6912: my $file = shift;
6913: if ( (! -e $file ) || ($file eq '') ) { return -1; };
6914: my $fh;
6915: open($fh,"<$file");
6916: my $a='';
6917: while (<$fh>) { $a .=$_; }
6918: return $a;
6919: }
6920:
6921: sub filelocation {
6922: my ($dir,$file) = @_;
6923: my $location;
6924: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
6925:
6926: if ($file =~ m-^/adm/-) {
6927: $file=~s-^/adm/wrapper/-/-;
6928: $file=~s-^/adm/coursedocs/showdoc/-/-;
6929: }
6930: if ($file=~m:^/~:) { # is a contruction space reference
6931: $location = $file;
6932: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
6933: } elsif ($file=~m:^/home/[^/]*/public_html/:) {
6934: # is a correct contruction space reference
6935: $location = $file;
6936: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
6937: my ($udom,$uname,$filename)=
6938: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
6939: my $home=&homeserver($uname,$udom);
6940: my $is_me=0;
6941: my @ids=¤t_machine_ids();
6942: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
6943: if ($is_me) {
6944: $location=&propath($udom,$uname).
6945: '/userfiles/'.$filename;
6946: } else {
6947: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
6948: $udom.'/'.$uname.'/'.$filename;
6949: }
6950: } else {
6951: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6952: $file=~s:^/res/:/:;
6953: if ( !( $file =~ m:^/:) ) {
6954: $location = $dir. '/'.$file;
6955: } else {
6956: $location = '/home/httpd/html/res'.$file;
6957: }
6958: }
6959: $location=~s://+:/:g; # remove duplicate /
6960: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
6961: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
6962: return $location;
6963: }
6964:
6965: sub hreflocation {
6966: my ($dir,$file)=@_;
6967: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
6968: $file=filelocation($dir,$file);
6969: } elsif ($file=~m-^/adm/-) {
6970: $file=~s-^/adm/wrapper/-/-;
6971: $file=~s-^/adm/coursedocs/showdoc/-/-;
6972: }
6973: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
6974: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
6975: } elsif ($file=~m-/home/(\w+)/public_html/-) {
6976: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
6977: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
6978: $file=~s-^/home/httpd/lonUsers/([^/]*)/./././([^/]*)/userfiles/
6979: -/uploaded/$1/$2/-x;
6980: }
6981: return $file;
6982: }
6983:
6984: sub current_machine_domains {
6985: my $hostname=$hostname{$perlvar{'lonHostID'}};
6986: my @domains;
6987: while( my($id, $name) = each(%hostname)) {
6988: # &logthis("-$id-$name-$hostname-");
6989: if ($hostname eq $name) {
6990: push(@domains,$hostdom{$id});
6991: }
6992: }
6993: return @domains;
6994: }
6995:
6996: sub current_machine_ids {
6997: my $hostname=$hostname{$perlvar{'lonHostID'}};
6998: my @ids;
6999: while( my($id, $name) = each(%hostname)) {
7000: # &logthis("-$id-$name-$hostname-");
7001: if ($hostname eq $name) {
7002: push(@ids,$id);
7003: }
7004: }
7005: return @ids;
7006: }
7007:
7008: # ------------------------------------------------------------- Declutters URLs
7009:
7010: sub declutter {
7011: my $thisfn=shift;
7012: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
7013: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
7014: $thisfn=~s/^\///;
7015: $thisfn=~s|^adm/wrapper/||;
7016: $thisfn=~s|^adm/coursedocs/showdoc/||;
7017: $thisfn=~s/^res\///;
7018: $thisfn=~s/\?.+$//;
7019: return $thisfn;
7020: }
7021:
7022: # ------------------------------------------------------------- Clutter up URLs
7023:
7024: sub clutter {
7025: my $thisfn='/'.&declutter(shift);
7026: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
7027: $thisfn='/res'.$thisfn;
7028: }
7029: if ($thisfn !~m|/adm|) {
7030: if ($thisfn =~ m|/ext/|) {
7031: $thisfn='/adm/wrapper'.$thisfn;
7032: } else {
7033: my ($ext) = ($thisfn =~ /\.(\w+)$/);
7034: my $embstyle=&Apache::loncommon::fileembstyle($ext);
7035: if ($embstyle eq 'ssi'
7036: || ($embstyle eq 'hdn')
7037: || ($embstyle eq 'rat')
7038: || ($embstyle eq 'prv')
7039: || ($embstyle eq 'ign')) {
7040: #do nothing with these
7041: } elsif (($embstyle eq 'img')
7042: || ($embstyle eq 'emb')
7043: || ($embstyle eq 'wrp')) {
7044: $thisfn='/adm/wrapper'.$thisfn;
7045: } elsif ($embstyle eq 'unk'
7046: && $thisfn!~/\.(sequence|page)$/) {
7047: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
7048: } else {
7049: # &logthis("Got a blank emb style");
7050: }
7051: }
7052: }
7053: return $thisfn;
7054: }
7055:
7056: sub freeze_escape {
7057: my ($value)=@_;
7058: if (ref($value)) {
7059: $value=&nfreeze($value);
7060: return '__FROZEN__'.&escape($value);
7061: }
7062: return &escape($value);
7063: }
7064:
7065:
7066: sub thaw_unescape {
7067: my ($value)=@_;
7068: if ($value =~ /^__FROZEN__/) {
7069: substr($value,0,10,undef);
7070: $value=&unescape($value);
7071: return &thaw($value);
7072: }
7073: return &unescape($value);
7074: }
7075:
7076: sub correct_line_ends {
7077: my ($result)=@_;
7078: $$result =~s/\r\n/\n/mg;
7079: $$result =~s/\r/\n/mg;
7080: }
7081: # ================================================================ Main Program
7082:
7083: sub goodbye {
7084: &logthis("Starting Shut down");
7085: #not converted to using infrastruture and probably shouldn't be
7086: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
7087: #converted
7088: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
7089: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
7090: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
7091: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
7092: #1.1 only
7093: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
7094: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
7095: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
7096: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
7097: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
7098: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
7099: &logthis(sprintf("%-20s is %s",'hits',$hits));
7100: &flushcourselogs();
7101: &logthis("Shutting down");
7102: }
7103:
7104: BEGIN {
7105: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
7106: unless ($readit) {
7107: {
7108: my $configvars = LONCAPA::Configuration::read_conf('loncapa.conf');
7109: %perlvar = (%perlvar,%{$configvars});
7110: }
7111:
7112: # ------------------------------------------------------------ Read domain file
7113: {
7114: %domaindescription = ();
7115: %domain_auth_def = ();
7116: %domain_auth_arg_def = ();
7117: my $fh;
7118: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
7119: while (<$fh>) {
7120: next if (/^(\#|\s*$)/);
7121: # next if /^\#/;
7122: chomp;
7123: my ($domain, $domain_description, $def_auth, $def_auth_arg,
7124: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$_);
7125: $domain_auth_def{$domain}=$def_auth;
7126: $domain_auth_arg_def{$domain}=$def_auth_arg;
7127: $domaindescription{$domain}=$domain_description;
7128: $domain_lang_def{$domain}=$def_lang;
7129: $domain_city{$domain}=$city;
7130: $domain_longi{$domain}=$longi;
7131: $domain_lati{$domain}=$lati;
7132: $domain_primary{$domain}=$primary;
7133:
7134: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
7135: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
7136: }
7137: }
7138: close ($fh);
7139: }
7140:
7141:
7142: # ------------------------------------------------------------- Read hosts file
7143: {
7144: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
7145:
7146: while (my $configline=<$config>) {
7147: next if ($configline =~ /^(\#|\s*$)/);
7148: chomp($configline);
7149: my ($id,$domain,$role,$name)=split(/:/,$configline);
7150: $name=~s/\s//g;
7151: if ($id && $domain && $role && $name) {
7152: $hostname{$id}=$name;
7153: $hostdom{$id}=$domain;
7154: if ($role eq 'library') { $libserv{$id}=$name; }
7155: }
7156: }
7157: close($config);
7158: # FIXME: dev server don't want this, production servers _do_ want this
7159: #&get_iphost();
7160: }
7161:
7162: sub get_iphost {
7163: if (%iphost) { return %iphost; }
7164: my %name_to_ip;
7165: foreach my $id (keys(%hostname)) {
7166: my $name=$hostname{$id};
7167: my $ip;
7168: if (!exists($name_to_ip{$name})) {
7169: $ip = gethostbyname($name);
7170: if (!$ip || length($ip) ne 4) {
7171: &logthis("Skipping host $id name $name no IP found\n");
7172: next;
7173: }
7174: $ip=inet_ntoa($ip);
7175: $name_to_ip{$name} = $ip;
7176: } else {
7177: $ip = $name_to_ip{$name};
7178: }
7179: push(@{$iphost{$ip}},$id);
7180: }
7181: return %iphost;
7182: }
7183:
7184: # ------------------------------------------------------ Read spare server file
7185: {
7186: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
7187:
7188: while (my $configline=<$config>) {
7189: chomp($configline);
7190: if ($configline) {
7191: my ($host,$type) = split(':',$configline,2);
7192: if ($type eq '') { $type = 'default' };
7193: push(@{ $spareid{$type} }, $host);
7194: }
7195: }
7196: close($config);
7197: }
7198: # ------------------------------------------------------------ Read permissions
7199: {
7200: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
7201:
7202: while (my $configline=<$config>) {
7203: chomp($configline);
7204: if ($configline) {
7205: my ($role,$perm)=split(/ /,$configline);
7206: if ($perm ne '') { $pr{$role}=$perm; }
7207: }
7208: }
7209: close($config);
7210: }
7211:
7212: # -------------------------------------------- Read plain texts for permissions
7213: {
7214: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
7215:
7216: while (my $configline=<$config>) {
7217: chomp($configline);
7218: if ($configline) {
7219: my ($short,@plain)=split(/:/,$configline);
7220: %{$prp{$short}} = ();
7221: if (@plain > 0) {
7222: $prp{$short}{'std'} = $plain[0];
7223: for (my $i=1; $i<@plain; $i++) {
7224: $prp{$short}{'alt'.$i} = $plain[$i];
7225: }
7226: }
7227: }
7228: }
7229: close($config);
7230: }
7231:
7232: # ---------------------------------------------------------- Read package table
7233: {
7234: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
7235:
7236: while (my $configline=<$config>) {
7237: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
7238: chomp($configline);
7239: my ($short,$plain)=split(/:/,$configline);
7240: my ($pack,$name)=split(/\&/,$short);
7241: if ($plain ne '') {
7242: $packagetab{$pack.'&'.$name.'&name'}=$name;
7243: $packagetab{$short}=$plain;
7244: }
7245: }
7246: close($config);
7247: }
7248:
7249: # ------------- set up temporary directory
7250: {
7251: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
7252:
7253: }
7254:
7255: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
7256:
7257: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
7258: $dumpcount=0;
7259:
7260: &logtouch();
7261: &logthis('<font color="yellow">INFO: Read configuration</font>');
7262: $readit=1;
7263: {
7264: use integer;
7265: my $test=(2**32)+1;
7266: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
7267: &logthis(" Detected 64bit platform ($_64bit)");
7268: }
7269: }
7270: }
7271:
7272: 1;
7273: __END__
7274:
7275: =pod
7276:
7277: =head1 NAME
7278:
7279: Apache::lonnet - Subroutines to ask questions about things in the network.
7280:
7281: =head1 SYNOPSIS
7282:
7283: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
7284:
7285: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
7286:
7287: Common parameters:
7288:
7289: =over 4
7290:
7291: =item *
7292:
7293: $uname : an internal username (if $cname expecting a course Id specifically)
7294:
7295: =item *
7296:
7297: $udom : a domain (if $cdom expecting a course's domain specifically)
7298:
7299: =item *
7300:
7301: $symb : a resource instance identifier
7302:
7303: =item *
7304:
7305: $namespace : the name of a .db file that contains the data needed or
7306: being set.
7307:
7308: =back
7309:
7310: =head1 OVERVIEW
7311:
7312: lonnet provides subroutines which interact with the
7313: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
7314: about classes, users, and resources.
7315:
7316: For many of these objects you can also use this to store data about
7317: them or modify them in various ways.
7318:
7319: =head2 Symbs
7320:
7321: To identify a specific instance of a resource, LON-CAPA uses symbols
7322: or "symbs"X<symb>. These identifiers are built from the URL of the
7323: map, the resource number of the resource in the map, and the URL of
7324: the resource itself. The latter is somewhat redundant, but might help
7325: if maps change.
7326:
7327: An example is
7328:
7329: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
7330:
7331: The respective map entry is
7332:
7333: <resource id="19" src="/res/msu/korte/tests/part12.problem"
7334: title="Problem 2">
7335: </resource>
7336:
7337: Symbs are used by the random number generator, as well as to store and
7338: restore data specific to a certain instance of for example a problem.
7339:
7340: =head2 Storing And Retrieving Data
7341:
7342: X<store()>X<cstore()>X<restore()>Three of the most important functions
7343: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
7344: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
7345: is is the non-critical message twin of cstore. These functions are for
7346: handlers to store a perl hash to a user's permanent data space in an
7347: easy manner, and to retrieve it again on another call. It is expected
7348: that a handler would use this once at the beginning to retrieve data,
7349: and then again once at the end to send only the new data back.
7350:
7351: The data is stored in the user's data directory on the user's
7352: homeserver under the ID of the course.
7353:
7354: The hash that is returned by restore will have all of the previous
7355: value for all of the elements of the hash.
7356:
7357: Example:
7358:
7359: #creating a hash
7360: my %hash;
7361: $hash{'foo'}='bar';
7362:
7363: #storing it
7364: &Apache::lonnet::cstore(\%hash);
7365:
7366: #changing a value
7367: $hash{'foo'}='notbar';
7368:
7369: #adding a new value
7370: $hash{'bar'}='foo';
7371: &Apache::lonnet::cstore(\%hash);
7372:
7373: #retrieving the hash
7374: my %history=&Apache::lonnet::restore();
7375:
7376: #print the hash
7377: foreach my $key (sort(keys(%history))) {
7378: print("\%history{$key} = $history{$key}");
7379: }
7380:
7381: Will print out:
7382:
7383: %history{1:foo} = bar
7384: %history{1:keys} = foo:timestamp
7385: %history{1:timestamp} = 990455579
7386: %history{2:bar} = foo
7387: %history{2:foo} = notbar
7388: %history{2:keys} = foo:bar:timestamp
7389: %history{2:timestamp} = 990455580
7390: %history{bar} = foo
7391: %history{foo} = notbar
7392: %history{timestamp} = 990455580
7393: %history{version} = 2
7394:
7395: Note that the special hash entries C<keys>, C<version> and
7396: C<timestamp> were added to the hash. C<version> will be equal to the
7397: total number of versions of the data that have been stored. The
7398: C<timestamp> attribute will be the UNIX time the hash was
7399: stored. C<keys> is available in every historical section to list which
7400: keys were added or changed at a specific historical revision of a
7401: hash.
7402:
7403: B<Warning>: do not store the hash that restore returns directly. This
7404: will cause a mess since it will restore the historical keys as if the
7405: were new keys. I.E. 1:foo will become 1:1:foo etc.
7406:
7407: Calling convention:
7408:
7409: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
7410: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
7411:
7412: For more detailed information, see lonnet specific documentation.
7413:
7414: =head1 RETURN MESSAGES
7415:
7416: =over 4
7417:
7418: =item * B<con_lost>: unable to contact remote host
7419:
7420: =item * B<con_delayed>: unable to contact remote host, message will be delivered
7421: when the connection is brought back up
7422:
7423: =item * B<con_failed>: unable to contact remote host and unable to save message
7424: for later delivery
7425:
7426: =item * B<error:>: an error a occured, a description of the error follows the :
7427:
7428: =item * B<no_such_host>: unable to fund a host associated with the user/domain
7429: that was requested
7430:
7431: =back
7432:
7433: =head1 PUBLIC SUBROUTINES
7434:
7435: =head2 Session Environment Functions
7436:
7437: =over 4
7438:
7439: =item *
7440: X<appenv()>
7441: B<appenv(%hash)>: the value of %hash is written to
7442: the user envirnoment file, and will be restored for each access this
7443: user makes during this session, also modifies the %env for the current
7444: process
7445:
7446: =item *
7447: X<delenv()>
7448: B<delenv($regexp)>: removes all items from the session
7449: environment file that matches the regular expression in $regexp. The
7450: values are also delted from the current processes %env.
7451:
7452: =back
7453:
7454: =head2 User Information
7455:
7456: =over 4
7457:
7458: =item *
7459: X<queryauthenticate()>
7460: B<queryauthenticate($uname,$udom)>: try to determine user's current
7461: authentication scheme
7462:
7463: =item *
7464: X<authenticate()>
7465: B<authenticate($uname,$upass,$udom)>: try to
7466: authenticate user from domain's lib servers (first use the current
7467: one). C<$upass> should be the users password.
7468:
7469: =item *
7470: X<homeserver()>
7471: B<homeserver($uname,$udom)>: find the server which has
7472: the user's directory and files (there must be only one), this caches
7473: the answer, and also caches if there is a borken connection.
7474:
7475: =item *
7476: X<idget()>
7477: B<idget($udom,@ids)>: find the usernames behind a list of IDs
7478: (IDs are a unique resource in a domain, there must be only 1 ID per
7479: username, and only 1 username per ID in a specific domain) (returns
7480: hash: id=>name,id=>name)
7481:
7482: =item *
7483: X<idrget()>
7484: B<idrget($udom,@unames)>: find the IDs behind a list of
7485: usernames (returns hash: name=>id,name=>id)
7486:
7487: =item *
7488: X<idput()>
7489: B<idput($udom,%ids)>: store away a list of names and associated IDs
7490:
7491: =item *
7492: X<rolesinit()>
7493: B<rolesinit($udom,$username,$authhost)>: get user privileges
7494:
7495: =item *
7496: X<getsection()>
7497: B<getsection($udom,$uname,$cname)>: finds the section of student in the
7498: course $cname, return section name/number or '' for "not in course"
7499: and '-1' for "no section"
7500:
7501: =item *
7502: X<userenvironment()>
7503: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
7504: passed in @what from the requested user's environment, returns a hash
7505:
7506: =back
7507:
7508: =head2 User Roles
7509:
7510: =over 4
7511:
7512: =item *
7513:
7514: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
7515: actions
7516: F: full access
7517: U,I,K: authentication modes (cxx only)
7518: '': forbidden
7519: 1: user needs to choose course
7520: 2: browse allowed
7521: A: passphrase authentication needed
7522:
7523: =item *
7524:
7525: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
7526: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
7527: and course level
7528:
7529: =item *
7530:
7531: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
7532: explanation of a user role term
7533:
7534: =back
7535:
7536: =head2 User Modification
7537:
7538: =over 4
7539:
7540: =item *
7541:
7542: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
7543: user for the level given by URL. Optional start and end dates (leave empty
7544: string or zero for "no date")
7545:
7546: =item *
7547:
7548: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
7549: change a users, password, possible return values are: ok,
7550: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
7551: refused
7552:
7553: =item *
7554:
7555: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
7556:
7557: =item *
7558:
7559: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
7560: modify user
7561:
7562: =item *
7563:
7564: modifystudent
7565:
7566: modify a students enrollment and identification information.
7567: The course id is resolved based on the current users environment.
7568: This means the envoking user must be a course coordinator or otherwise
7569: associated with a course.
7570:
7571: This call is essentially a wrapper for lonnet::modifyuser and
7572: lonnet::modify_student_enrollment
7573:
7574: Inputs:
7575:
7576: =over 4
7577:
7578: =item B<$udom> Students loncapa domain
7579:
7580: =item B<$uname> Students loncapa login name
7581:
7582: =item B<$uid> Students id/student number
7583:
7584: =item B<$umode> Students authentication mode
7585:
7586: =item B<$upass> Students password
7587:
7588: =item B<$first> Students first name
7589:
7590: =item B<$middle> Students middle name
7591:
7592: =item B<$last> Students last name
7593:
7594: =item B<$gene> Students generation
7595:
7596: =item B<$usec> Students section in course
7597:
7598: =item B<$end> Unix time of the roles expiration
7599:
7600: =item B<$start> Unix time of the roles start date
7601:
7602: =item B<$forceid> If defined, allow $uid to be changed
7603:
7604: =item B<$desiredhome> server to use as home server for student
7605:
7606: =back
7607:
7608: =item *
7609:
7610: modify_student_enrollment
7611:
7612: Change a students enrollment status in a class. The environment variable
7613: 'role.request.course' must be defined for this function to proceed.
7614:
7615: Inputs:
7616:
7617: =over 4
7618:
7619: =item $udom, students domain
7620:
7621: =item $uname, students name
7622:
7623: =item $uid, students user id
7624:
7625: =item $first, students first name
7626:
7627: =item $middle
7628:
7629: =item $last
7630:
7631: =item $gene
7632:
7633: =item $usec
7634:
7635: =item $end
7636:
7637: =item $start
7638:
7639: =back
7640:
7641:
7642: =item *
7643:
7644: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
7645: custom role; give a custom role to a user for the level given by URL. Specify
7646: name and domain of role author, and role name
7647:
7648: =item *
7649:
7650: revokerole($udom,$uname,$url,$role) : revoke a role for url
7651:
7652: =item *
7653:
7654: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
7655:
7656: =back
7657:
7658: =head2 Course Infomation
7659:
7660: =over 4
7661:
7662: =item *
7663:
7664: coursedescription($courseid) : returns a hash of information about the
7665: specified course id, including all environment settings for the
7666: course, the description of the course will be in the hash under the
7667: key 'description'
7668:
7669: =item *
7670:
7671: resdata($name,$domain,$type,@which) : request for current parameter
7672: setting for a specific $type, where $type is either 'course' or 'user',
7673: @what should be a list of parameters to ask about. This routine caches
7674: answers for 5 minutes.
7675:
7676: =back
7677:
7678: =head2 Course Modification
7679:
7680: =over 4
7681:
7682: =item *
7683:
7684: writecoursepref($courseid,%prefs) : write preferences (environment
7685: database) for a course
7686:
7687: =item *
7688:
7689: createcourse($udom,$description,$url) : make/modify course
7690:
7691: =back
7692:
7693: =head2 Resource Subroutines
7694:
7695: =over 4
7696:
7697: =item *
7698:
7699: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
7700:
7701: =item *
7702:
7703: repcopy($filename) : subscribes to the requested file, and attempts to
7704: replicate from the owning library server, Might return
7705: 'unavailable', 'not_found', 'forbidden', 'ok', or
7706: 'bad_request', also attempts to grab the metadata for the
7707: resource. Expects the local filesystem pathname
7708: (/home/httpd/html/res/....)
7709:
7710: =back
7711:
7712: =head2 Resource Information
7713:
7714: =over 4
7715:
7716: =item *
7717:
7718: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
7719: a vairety of different possible values, $varname should be a request
7720: string, and the other parameters can be used to specify who and what
7721: one is asking about.
7722:
7723: Possible values for $varname are environment.lastname (or other item
7724: from the envirnment hash), user.name (or someother aspect about the
7725: user), resource.0.maxtries (or some other part and parameter of a
7726: resource)
7727:
7728: =item *
7729:
7730: directcondval($number) : get current value of a condition; reads from a state
7731: string
7732:
7733: =item *
7734:
7735: condval($condidx) : value of condition index based on state
7736:
7737: =item *
7738:
7739: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
7740: resource's metadata, $what should be either a specific key, or either
7741: 'keys' (to get a list of possible keys) or 'packages' to get a list of
7742: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
7743:
7744: this function automatically caches all requests
7745:
7746: =item *
7747:
7748: metadata_query($query,$custom,$customshow) : make a metadata query against the
7749: network of library servers; returns file handle of where SQL and regex results
7750: will be stored for query
7751:
7752: =item *
7753:
7754: symbread($filename) : return symbolic list entry (filename argument optional);
7755: returns the data handle
7756:
7757: =item *
7758:
7759: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
7760: a possible symb for the URL in $thisfn, and if is an encryypted
7761: resource that the user accessed using /enc/ returns a 1 on success, 0
7762: on failure, user must be in a course, as it assumes the existance of
7763: the course initial hash, and uses $env('request.course.id'}
7764:
7765:
7766: =item *
7767:
7768: symbclean($symb) : removes versions numbers from a symb, returns the
7769: cleaned symb
7770:
7771: =item *
7772:
7773: is_on_map($uri) : checks if the $uri is somewhere on the current
7774: course map, user must be in a course for it to work.
7775:
7776: =item *
7777:
7778: numval($salt) : return random seed value (addend for rndseed)
7779:
7780: =item *
7781:
7782: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
7783: a random seed, all arguments are optional, if they aren't sent it uses the
7784: environment to derive them. Note: if symb isn't sent and it can't get one
7785: from &symbread it will use the current time as its return value
7786:
7787: =item *
7788:
7789: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
7790: unfakeable, receipt
7791:
7792: =item *
7793:
7794: receipt() : API to ireceipt working off of env values; given out to users
7795:
7796: =item *
7797:
7798: countacc($url) : count the number of accesses to a given URL
7799:
7800: =item *
7801:
7802: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
7803:
7804: =item *
7805:
7806: checkin($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 $tcrsid)
7807:
7808: =item *
7809:
7810: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
7811:
7812: =item *
7813:
7814: devalidate($symb) : devalidate temporary spreadsheet calculations,
7815: forcing spreadsheet to reevaluate the resource scores next time.
7816:
7817: =back
7818:
7819: =head2 Storing/Retreiving Data
7820:
7821: =over 4
7822:
7823: =item *
7824:
7825: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
7826: for this url; hashref needs to be given and should be a \%hashname; the
7827: remaining args aren't required and if they aren't passed or are '' they will
7828: be derived from the env
7829:
7830: =item *
7831:
7832: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
7833: uses critical subroutine
7834:
7835: =item *
7836:
7837: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
7838: all args are optional
7839:
7840: =item *
7841:
7842: dumpstore($namespace,$udom,$uname,$regexp,$range) :
7843: dumps the complete (or key matching regexp) namespace into a hash
7844: ($udom, $uname, $regexp, $range are optional) for a namespace that is
7845: normally &store()ed into
7846:
7847: $range should be either an integer '100' (give me the first 100
7848: matching records)
7849: or be two integers sperated by a - with no spaces
7850: '30-50' (give me the 30th through the 50th matching
7851: records)
7852:
7853:
7854: =item *
7855:
7856: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
7857: replaces a &store() version of data with a replacement set of data
7858: for a particular resource in a namespace passed in the $storehash hash
7859: reference
7860:
7861: =item *
7862:
7863: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
7864: works very similar to store/cstore, but all data is stored in a
7865: temporary location and can be reset using tmpreset, $storehash should
7866: be a hash reference, returns nothing on success
7867:
7868: =item *
7869:
7870: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
7871: similar to restore, but all data is stored in a temporary location and
7872: can be reset using tmpreset. Returns a hash of values on success,
7873: error string otherwise.
7874:
7875: =item *
7876:
7877: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
7878: deltes all keys for $symb form the temporary storage hash.
7879:
7880: =item *
7881:
7882: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7883: reference filled in from namesp ($udom and $uname are optional)
7884:
7885: =item *
7886:
7887: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
7888: namesp ($udom and $uname are optional)
7889:
7890: =item *
7891:
7892: dump($namespace,$udom,$uname,$regexp,$range) :
7893: dumps the complete (or key matching regexp) namespace into a hash
7894: ($udom, $uname, $regexp, $range are optional)
7895:
7896: $range should be either an integer '100' (give me the first 100
7897: matching records)
7898: or be two integers sperated by a - with no spaces
7899: '30-50' (give me the 30th through the 50th matching
7900: records)
7901: =item *
7902:
7903: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
7904: $store can be a scalar, an array reference, or if the amount to be
7905: incremented is > 1, a hash reference.
7906:
7907: ($udom and $uname are optional)
7908:
7909: =item *
7910:
7911: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
7912: ($udom and $uname are optional)
7913:
7914: =item *
7915:
7916: cput($namespace,$storehash,$udom,$uname) : critical put
7917: ($udom and $uname are optional)
7918:
7919: =item *
7920:
7921: newput($namespace,$storehash,$udom,$uname) :
7922:
7923: Attempts to store the items in the $storehash, but only if they don't
7924: currently exist, if this succeeds you can be certain that you have
7925: successfully created a new key value pair in the $namespace db.
7926:
7927:
7928: Args:
7929: $namespace: name of database to store values to
7930: $storehash: hashref to store to the db
7931: $udom: (optional) domain of user containing the db
7932: $uname: (optional) name of user caontaining the db
7933:
7934: Returns:
7935: 'ok' -> succeeded in storing all keys of $storehash
7936: 'key_exists: <key>' -> failed to anything out of $storehash, as at
7937: least <key> already existed in the db (other
7938: requested keys may also already exist)
7939: 'error: <msg>' -> unable to tie the DB or other erorr occured
7940: 'con_lost' -> unable to contact request server
7941: 'refused' -> action was not allowed by remote machine
7942:
7943:
7944: =item *
7945:
7946: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7947: reference filled in from namesp (encrypts the return communication)
7948: ($udom and $uname are optional)
7949:
7950: =item *
7951:
7952: log($udom,$name,$home,$message) : write to permanent log for user; use
7953: critical subroutine
7954:
7955: =back
7956:
7957: =head2 Network Status Functions
7958:
7959: =over 4
7960:
7961: =item *
7962:
7963: dirlist($uri) : return directory list based on URI
7964:
7965: =item *
7966:
7967: spareserver() : find server with least workload from spare.tab
7968:
7969: =back
7970:
7971: =head2 Apache Request
7972:
7973: =over 4
7974:
7975: =item *
7976:
7977: ssi($url,%hash) : server side include, does a complete request cycle on url to
7978: localhost, posts hash
7979:
7980: =back
7981:
7982: =head2 Data to String to Data
7983:
7984: =over 4
7985:
7986: =item *
7987:
7988: hash2str(%hash) : convert a hash into a string complete with escaping and '='
7989: and '&' separators, supports elements that are arrayrefs and hashrefs
7990:
7991: =item *
7992:
7993: hashref2str($hashref) : convert a hashref into a string complete with
7994: escaping and '=' and '&' separators, supports elements that are
7995: arrayrefs and hashrefs
7996:
7997: =item *
7998:
7999: arrayref2str($arrayref) : convert an arrayref into a string complete
8000: with escaping and '&' separators, supports elements that are arrayrefs
8001: and hashrefs
8002:
8003: =item *
8004:
8005: str2hash($string) : convert string to hash using unescaping and
8006: splitting on '=' and '&', supports elements that are arrayrefs and
8007: hashrefs
8008:
8009: =item *
8010:
8011: str2array($string) : convert string to hash using unescaping and
8012: splitting on '&', supports elements that are arrayrefs and hashrefs
8013:
8014: =back
8015:
8016: =head2 Logging Routines
8017:
8018: =over 4
8019:
8020: These routines allow one to make log messages in the lonnet.log and
8021: lonnet.perm logfiles.
8022:
8023: =item *
8024:
8025: logtouch() : make sure the logfile, lonnet.log, exists
8026:
8027: =item *
8028:
8029: logthis() : append message to the normal lonnet.log file, it gets
8030: preiodically rolled over and deleted.
8031:
8032: =item *
8033:
8034: logperm() : append a permanent message to lonnet.perm.log, this log
8035: file never gets deleted by any automated portion of the system, only
8036: messages of critical importance should go in here.
8037:
8038: =back
8039:
8040: =head2 General File Helper Routines
8041:
8042: =over 4
8043:
8044: =item *
8045:
8046: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
8047: (a) files in /uploaded
8048: (i) If a local copy of the file exists -
8049: compares modification date of local copy with last-modified date for
8050: definitive version stored on home server for course. If local copy is
8051: stale, requests a new version from the home server and stores it.
8052: If the original has been removed from the home server, then local copy
8053: is unlinked.
8054: (ii) If local copy does not exist -
8055: requests the file from the home server and stores it.
8056:
8057: If $caller is 'uploadrep':
8058: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
8059: for request for files originally uploaded via DOCS.
8060: - returns 'ok' if fresh local copy now available, -1 otherwise.
8061:
8062: Otherwise:
8063: This indicates a call from the content generation phase of the request.
8064: - returns the entire contents of the file or -1.
8065:
8066: (b) files in /res
8067: - returns the entire contents of a file or -1;
8068: it properly subscribes to and replicates the file if neccessary.
8069:
8070:
8071: =item *
8072:
8073: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
8074: reference
8075:
8076: returns either a stat() list of data about the file or an empty list
8077: if the file doesn't exist or couldn't find out about it (connection
8078: problems or user unknown)
8079:
8080: =item *
8081:
8082: filelocation($dir,$file) : returns file system location of a file
8083: based on URI; meant to be "fairly clean" absolute reference, $dir is a
8084: directory that relative $file lookups are to looked in ($dir of /a/dir
8085: and a file of ../bob will become /a/bob)
8086:
8087: =item *
8088:
8089: hreflocation($dir,$file) : returns file system location or a URL; same as
8090: filelocation except for hrefs
8091:
8092: =item *
8093:
8094: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
8095:
8096: =back
8097:
8098: =head2 Usererfile file routines (/uploaded*)
8099:
8100: =over 4
8101:
8102: =item *
8103:
8104: userfileupload(): main rotine for putting a file in a user or course's
8105: filespace, arguments are,
8106:
8107: formname - required - this is the name of the element in $env where the
8108: filename, and the contents of the file to create/modifed exist
8109: the filename is in $env{'form.'.$formname.'.filename'} and the
8110: contents of the file is located in $env{'form.'.$formname}
8111: coursedoc - if true, store the file in the course of the active role
8112: of the current user
8113: subdir - required - subdirectory to put the file in under ../userfiles/
8114: if undefined, it will be placed in "unknown"
8115:
8116: (This routine calls clean_filename() to remove any dangerous
8117: characters from the filename, and then calls finuserfileupload() to
8118: complete the transaction)
8119:
8120: returns either the url of the uploaded file (/uploaded/....) if successful
8121: and /adm/notfound.html if unsuccessful
8122:
8123: =item *
8124:
8125: clean_filename(): routine for cleaing a filename up for storage in
8126: userfile space, argument is:
8127:
8128: filename - proposed filename
8129:
8130: returns: the new clean filename
8131:
8132: =item *
8133:
8134: finishuserfileupload(): routine that creaes and sends the file to
8135: userspace, probably shouldn't be called directly
8136:
8137: docuname: username or courseid of destination for the file
8138: docudom: domain of user/course of destination for the file
8139: formname: same as for userfileupload()
8140: fname: filename (inculding subdirectories) for the file
8141:
8142: returns either the url of the uploaded file (/uploaded/....) if successful
8143: and /adm/notfound.html if unsuccessful
8144:
8145: =item *
8146:
8147: renameuserfile(): renames an existing userfile to a new name
8148:
8149: Args:
8150: docuname: username or courseid of destination for the file
8151: docudom: domain of user/course of destination for the file
8152: old: current file name (including any subdirs under userfiles)
8153: new: desired file name (including any subdirs under userfiles)
8154:
8155: =item *
8156:
8157: mkdiruserfile(): creates a directory is a userfiles dir
8158:
8159: Args:
8160: docuname: username or courseid of destination for the file
8161: docudom: domain of user/course of destination for the file
8162: dir: dir to create (including any subdirs under userfiles)
8163:
8164: =item *
8165:
8166: removeuserfile(): removes a file that exists in userfiles
8167:
8168: Args:
8169: docuname: username or courseid of destination for the file
8170: docudom: domain of user/course of destination for the file
8171: fname: filname to delete (including any subdirs under userfiles)
8172:
8173: =item *
8174:
8175: removeuploadedurl(): convience function for removeuserfile()
8176:
8177: Args:
8178: url: a full /uploaded/... url to delete
8179:
8180: =item *
8181:
8182: get_portfile_permissions():
8183: Args:
8184: domain: domain of user or course contain the portfolio files
8185: user: name of user or num of course contain the portfolio files
8186: Returns:
8187: hashref of a dump of the proper file_permissions.db
8188:
8189:
8190: =item *
8191:
8192: get_access_controls():
8193:
8194: Args:
8195: current_permissions: the hash ref returned from get_portfile_permissions()
8196: group: (optional) the group you want the files associated with
8197: file: (optional) the file you want access info on
8198:
8199: Returns:
8200: a hash (keys are file names) of hashes containing
8201: keys are: path to file/file_name\0uniqueID:scope_end_start (see below)
8202: values are XML containing access control settings (see below)
8203:
8204: Internal notes:
8205:
8206: access controls are stored in file_permissions.db as key=value pairs.
8207: key -> path to file/file_name\0uniqueID:scope_end_start
8208: where scope -> public,guest,course,group,domains or users.
8209: end -> UNIX time for end of access (0 -> no end date)
8210: start -> UNIX time for start of access
8211:
8212: value -> XML description of access control
8213: <scope type=""> (type =1 of: public,guest,course,group,domains,users">
8214: <start></start>
8215: <end></end>
8216:
8217: <password></password> for scope type = guest
8218:
8219: <domain></domain> for scope type = course or group
8220: <number></number>
8221: <roles id="">
8222: <role></role>
8223: <access></access>
8224: <section></section>
8225: <group></group>
8226: </roles>
8227:
8228: <dom></dom> for scope type = domains
8229:
8230: <users> for scope type = users
8231: <user>
8232: <uname></uname>
8233: <udom></udom>
8234: </user>
8235: </users>
8236: </scope>
8237:
8238: Access data is also aggregated for each file in an additional key=value pair:
8239: key -> path to file/file_name\0accesscontrol
8240: value -> reference to hash
8241: hash contains key = value pairs
8242: where key = uniqueID:scope_end_start
8243: value = UNIX time record was last updated
8244:
8245: Used to improve speed of look-ups of access controls for each file.
8246:
8247: Locks on files (resulting from submission of portfolio file to a homework problem stored in array of arrays.
8248:
8249: modify_access_controls():
8250:
8251: Modifies access controls for a portfolio file
8252: Args
8253: 1. file name
8254: 2. reference to hash of required changes,
8255: 3. domain
8256: 4. username
8257: where domain,username are the domain of the portfolio owner
8258: (either a user or a course)
8259:
8260: Returns:
8261: 1. result of additions or updates ('ok' or 'error', with error message).
8262: 2. result of deletions ('ok' or 'error', with error message).
8263: 3. reference to hash of any new or updated access controls.
8264: 4. reference to hash used to map incoming IDs to uniqueIDs assigned to control.
8265: key = integer (inbound ID)
8266: value = uniqueID
8267:
8268: =back
8269:
8270: =head2 HTTP Helper Routines
8271:
8272: =over 4
8273:
8274: =item *
8275:
8276: escape() : unpack non-word characters into CGI-compatible hex codes
8277:
8278: =item *
8279:
8280: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
8281:
8282: =back
8283:
8284: =head1 PRIVATE SUBROUTINES
8285:
8286: =head2 Underlying communication routines (Shouldn't call)
8287:
8288: =over 4
8289:
8290: =item *
8291:
8292: subreply() : tries to pass a message to lonc, returns con_lost if incapable
8293:
8294: =item *
8295:
8296: reply() : uses subreply to send a message to remote machine, logs all failures
8297:
8298: =item *
8299:
8300: critical() : passes a critical message to another server; if cannot
8301: get through then place message in connection buffer directory and
8302: returns con_delayed, if incapable of saving message, returns
8303: con_failed
8304:
8305: =item *
8306:
8307: reconlonc() : tries to reconnect lonc client processes.
8308:
8309: =back
8310:
8311: =head2 Resource Access Logging
8312:
8313: =over 4
8314:
8315: =item *
8316:
8317: flushcourselogs() : flush (save) buffer logs and access logs
8318:
8319: =item *
8320:
8321: courselog($what) : save message for course in hash
8322:
8323: =item *
8324:
8325: courseacclog($what) : save message for course using &courselog(). Perform
8326: special processing for specific resource types (problems, exams, quizzes, etc).
8327:
8328: =item *
8329:
8330: goodbye() : flush course logs and log shutting down; it is called in srm.conf
8331: as a PerlChildExitHandler
8332:
8333: =back
8334:
8335: =head2 Other
8336:
8337: =over 4
8338:
8339: =item *
8340:
8341: symblist($mapname,%newhash) : update symbolic storage links
8342:
8343: =back
8344:
8345: =cut
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