1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.720 2006/03/08 21:47:15 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %hostname %badServerCache %iphost %spareid %hostdom
39: %libserv %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash %domainrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf
42: %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati %domain_primary
44: $tmpdir $_64bit %env);
45:
46: use IO::Socket;
47: use GDBM_File;
48: use Apache::Constants qw(:common :http);
49: use HTML::LCParser;
50: use HTML::Parser;
51: use Fcntl qw(:flock);
52: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
53: use Time::HiRes qw( gettimeofday tv_interval );
54: use Cache::Memcached;
55: use Digest::MD5;
56:
57: my $readit;
58: my $max_connection_retries = 10; # Or some such value.
59:
60: require Exporter;
61:
62: our @ISA = qw (Exporter);
63: our @EXPORT = qw(%env);
64:
65: =pod
66:
67: =head1 Package Variables
68:
69: These are largely undocumented, so if you decipher one please note it here.
70:
71: =over 4
72:
73: =item $processmarker
74:
75: Contains the time this process was started and this servers host id.
76:
77: =item $dumpcount
78:
79: Counts the number of times a message log flush has been attempted (regardless
80: of success) by this process. Used as part of the filename when messages are
81: delayed.
82:
83: =back
84:
85: =cut
86:
87:
88: # --------------------------------------------------------------------- Logging
89:
90: sub logtouch {
91: my $execdir=$perlvar{'lonDaemons'};
92: unless (-e "$execdir/logs/lonnet.log") {
93: open(my $fh,">>$execdir/logs/lonnet.log");
94: close $fh;
95: }
96: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
97: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
98: }
99:
100: sub logthis {
101: my $message=shift;
102: my $execdir=$perlvar{'lonDaemons'};
103: my $now=time;
104: my $local=localtime($now);
105: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
106: print $fh "$local ($$): $message\n";
107: close($fh);
108: }
109: return 1;
110: }
111:
112: sub logperm {
113: my $message=shift;
114: my $execdir=$perlvar{'lonDaemons'};
115: my $now=time;
116: my $local=localtime($now);
117: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
118: print $fh "$now:$message:$local\n";
119: close($fh);
120: }
121: return 1;
122: }
123:
124: # -------------------------------------------------- Non-critical communication
125: sub subreply {
126: my ($cmd,$server)=@_;
127: my $peerfile="$perlvar{'lonSockDir'}/".$hostname{$server};
128: #
129: # With loncnew process trimming, there's a timing hole between lonc server
130: # process exit and the master server picking up the listen on the AF_UNIX
131: # socket. In that time interval, a lock file will exist:
132:
133: my $lockfile=$peerfile.".lock";
134: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
135: sleep(1);
136: }
137: # At this point, either a loncnew parent is listening or an old lonc
138: # or loncnew child is listening so we can connect or everything's dead.
139: #
140: # We'll give the connection a few tries before abandoning it. If
141: # connection is not possible, we'll con_lost back to the client.
142: #
143: my $client;
144: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
145: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
146: Type => SOCK_STREAM,
147: Timeout => 10);
148: if($client) {
149: last; # Connected!
150: }
151: sleep(1); # Try again later if failed connection.
152: }
153: my $answer;
154: if ($client) {
155: print $client "sethost:$server:$cmd\n";
156: $answer=<$client>;
157: if (!$answer) { $answer="con_lost"; }
158: chomp($answer);
159: } else {
160: $answer = 'con_lost'; # Failed connection.
161: }
162: return $answer;
163: }
164:
165: sub reply {
166: my ($cmd,$server)=@_;
167: unless (defined($hostname{$server})) { return 'no_such_host'; }
168: my $answer=subreply($cmd,$server);
169: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
170: &logthis("<font color=\"blue\">WARNING:".
171: " $cmd to $server returned $answer</font>");
172: }
173: return $answer;
174: }
175:
176: # ----------------------------------------------------------- Send USR1 to lonc
177:
178: sub reconlonc {
179: my $peerfile=shift;
180: &logthis("Trying to reconnect for $peerfile");
181: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
182: if (open(my $fh,"<$loncfile")) {
183: my $loncpid=<$fh>;
184: chomp($loncpid);
185: if (kill 0 => $loncpid) {
186: &logthis("lonc at pid $loncpid responding, sending USR1");
187: kill USR1 => $loncpid;
188: sleep 1;
189: if (-e "$peerfile") { return; }
190: &logthis("$peerfile still not there, give it another try");
191: sleep 5;
192: if (-e "$peerfile") { return; }
193: &logthis(
194: "<font color=\"blue\">WARNING: $peerfile still not there, giving up</font>");
195: } else {
196: &logthis(
197: "<font color=\"blue\">WARNING:".
198: " lonc at pid $loncpid not responding, giving up</font>");
199: }
200: } else {
201: &logthis('<font color="blue">WARNING: lonc not running, giving up</font>');
202: }
203: }
204:
205: # ------------------------------------------------------ Critical communication
206:
207: sub critical {
208: my ($cmd,$server)=@_;
209: unless ($hostname{$server}) {
210: &logthis("<font color=\"blue\">WARNING:".
211: " Critical message to unknown server ($server)</font>");
212: return 'no_such_host';
213: }
214: my $answer=reply($cmd,$server);
215: if ($answer eq 'con_lost') {
216: &reconlonc("$perlvar{'lonSockDir'}/$server");
217: my $answer=reply($cmd,$server);
218: if ($answer eq 'con_lost') {
219: my $now=time;
220: my $middlename=$cmd;
221: $middlename=substr($middlename,0,16);
222: $middlename=~s/\W//g;
223: my $dfilename=
224: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
225: $dumpcount++;
226: {
227: my $dfh;
228: if (open($dfh,">$dfilename")) {
229: print $dfh "$cmd\n";
230: close($dfh);
231: }
232: }
233: sleep 2;
234: my $wcmd='';
235: {
236: my $dfh;
237: if (open($dfh,"<$dfilename")) {
238: $wcmd=<$dfh>;
239: close($dfh);
240: }
241: }
242: chomp($wcmd);
243: if ($wcmd eq $cmd) {
244: &logthis("<font color=\"blue\">WARNING: ".
245: "Connection buffer $dfilename: $cmd</font>");
246: &logperm("D:$server:$cmd");
247: return 'con_delayed';
248: } else {
249: &logthis("<font color=\"red\">CRITICAL:"
250: ." Critical connection failed: $server $cmd</font>");
251: &logperm("F:$server:$cmd");
252: return 'con_failed';
253: }
254: }
255: }
256: return $answer;
257: }
258:
259: # ------------------------------------------- Transfer profile into environment
260:
261: sub transfer_profile_to_env {
262: my ($lonidsdir,$handle)=@_;
263: if (!defined($lonidsdir)) {
264: $lonidsdir = $perlvar{'lonIDsDir'};
265: }
266: if (!defined($handle)) {
267: ($handle) = ($env{'user.environment'} =~m|/([^/]+)\.id$| );
268: }
269:
270: my @profile;
271: {
272: open(my $idf,"$lonidsdir/$handle.id");
273: flock($idf,LOCK_SH);
274: @profile=<$idf>;
275: close($idf);
276: }
277: my $envi;
278: my %Remove;
279: for ($envi=0;$envi<=$#profile;$envi++) {
280: chomp($profile[$envi]);
281: my ($envname,$envvalue)=split(/=/,$profile[$envi],2);
282: $env{$envname} = $envvalue;
283: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
284: if ($time < time-300) {
285: $Remove{$key}++;
286: }
287: }
288: }
289: $env{'user.environment'} = "$lonidsdir/$handle.id";
290: foreach my $expired_key (keys(%Remove)) {
291: &delenv($expired_key);
292: }
293: }
294:
295: # ---------------------------------------------------------- Append Environment
296:
297: sub appenv {
298: my %newenv=@_;
299: foreach my $key (keys(%newenv)) {
300: if (($newenv{$key}=~/^user\.role/) || ($newenv{$key}=~/^user\.priv/)) {
301: &logthis("<font color=\"blue\">WARNING: ".
302: "Attempt to modify environment ".$key." to ".$newenv{$key}
303: .'</font>');
304: delete($newenv{$key});
305: } else {
306: $env{$key}=$newenv{$key};
307: }
308: }
309:
310: my $lockfh;
311: unless (open($lockfh,"$env{'user.environment'}")) {
312: return 'error: '.$!;
313: }
314: unless (flock($lockfh,LOCK_EX)) {
315: &logthis("<font color=\"blue\">WARNING: ".
316: 'Could not obtain exclusive lock in appenv: '.$!);
317: close($lockfh);
318: return 'error: '.$!;
319: }
320:
321: my @oldenv;
322: {
323: my $fh;
324: unless (open($fh,"$env{'user.environment'}")) {
325: return 'error: '.$!;
326: }
327: @oldenv=<$fh>;
328: close($fh);
329: }
330: for (my $i=0; $i<=$#oldenv; $i++) {
331: chomp($oldenv[$i]);
332: if ($oldenv[$i] ne '') {
333: my ($name,$value)=split(/=/,$oldenv[$i],2);
334: unless (defined($newenv{$name})) {
335: $newenv{$name}=$value;
336: }
337: }
338: }
339: {
340: my $fh;
341: unless (open($fh,">$env{'user.environment'}")) {
342: return 'error';
343: }
344: my $newname;
345: foreach $newname (keys %newenv) {
346: print $fh "$newname=$newenv{$newname}\n";
347: }
348: close($fh);
349: }
350:
351: close($lockfh);
352: return 'ok';
353: }
354: # ----------------------------------------------------- Delete from Environment
355:
356: sub delenv {
357: my $delthis=shift;
358: my %newenv=();
359: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
360: &logthis("<font color=\"blue\">WARNING: ".
361: "Attempt to delete from environment ".$delthis);
362: return 'error';
363: }
364: my @oldenv;
365: {
366: my $fh;
367: unless (open($fh,"$env{'user.environment'}")) {
368: return 'error';
369: }
370: unless (flock($fh,LOCK_SH)) {
371: &logthis("<font color=\"blue\">WARNING: ".
372: 'Could not obtain shared lock in delenv: '.$!);
373: close($fh);
374: return 'error: '.$!;
375: }
376: @oldenv=<$fh>;
377: close($fh);
378: }
379: {
380: my $fh;
381: unless (open($fh,">$env{'user.environment'}")) {
382: return 'error';
383: }
384: unless (flock($fh,LOCK_EX)) {
385: &logthis("<font color=\"blue\">WARNING: ".
386: 'Could not obtain exclusive lock in delenv: '.$!);
387: close($fh);
388: return 'error: '.$!;
389: }
390: foreach my $cur_key (@oldenv) {
391: if ($cur_key=~/^$delthis/) {
392: my ($key,undef) = split('=',$cur_key,2);
393: delete($env{$key});
394: } else {
395: print $fh $cur_key;
396: }
397: }
398: close($fh);
399: }
400: return 'ok';
401: }
402:
403: # ------------------------------------------ Find out current server userload
404: # there is a copy in lond
405: sub userload {
406: my $numusers=0;
407: {
408: opendir(LONIDS,$perlvar{'lonIDsDir'});
409: my $filename;
410: my $curtime=time;
411: while ($filename=readdir(LONIDS)) {
412: if ($filename eq '.' || $filename eq '..') {next;}
413: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
414: if ($curtime-$mtime < 1800) { $numusers++; }
415: }
416: closedir(LONIDS);
417: }
418: my $userloadpercent=0;
419: my $maxuserload=$perlvar{'lonUserLoadLim'};
420: if ($maxuserload) {
421: $userloadpercent=100*$numusers/$maxuserload;
422: }
423: $userloadpercent=sprintf("%.2f",$userloadpercent);
424: return $userloadpercent;
425: }
426:
427: # ------------------------------------------ Fight off request when overloaded
428:
429: sub overloaderror {
430: my ($r,$checkserver)=@_;
431: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
432: my $loadavg;
433: if ($checkserver eq $perlvar{'lonHostID'}) {
434: open(my $loadfile,'/proc/loadavg');
435: $loadavg=<$loadfile>;
436: $loadavg =~ s/\s.*//g;
437: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
438: close($loadfile);
439: } else {
440: $loadavg=&reply('load',$checkserver);
441: }
442: my $overload=$loadavg-100;
443: if ($overload>0) {
444: $r->err_headers_out->{'Retry-After'}=$overload;
445: $r->log_error('Overload of '.$overload.' on '.$checkserver);
446: return 413;
447: }
448: return '';
449: }
450:
451: # ------------------------------ Find server with least workload from spare.tab
452:
453: sub spareserver {
454: my ($loadpercent,$userloadpercent,$want_server_name) = @_;
455: my $tryserver;
456: my $spareserver='';
457: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
458: my $lowestserver=$loadpercent > $userloadpercent?
459: $loadpercent : $userloadpercent;
460: foreach $tryserver (keys(%spareid)) {
461: my $loadans=&reply('load',$tryserver);
462: my $userloadans=&reply('userload',$tryserver);
463: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
464: next; #didn't get a number from the server
465: }
466: my $answer;
467: if ($loadans =~ /\d/) {
468: if ($userloadans =~ /\d/) {
469: #both are numbers, pick the bigger one
470: $answer=$loadans > $userloadans?
471: $loadans : $userloadans;
472: } else {
473: $answer = $loadans;
474: }
475: } else {
476: $answer = $userloadans;
477: }
478: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
479: if ($want_server_name) {
480: $spareserver=$tryserver;
481: } else {
482: $spareserver="http://$hostname{$tryserver}";
483: }
484: $lowestserver=$answer;
485: }
486: }
487: return $spareserver;
488: }
489:
490: # --------------------------------------------- Try to change a user's password
491:
492: sub changepass {
493: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
494: $currentpass = &escape($currentpass);
495: $newpass = &escape($newpass);
496: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
497: $server);
498: if (! $answer) {
499: &logthis("No reply on password change request to $server ".
500: "by $uname in domain $udom.");
501: } elsif ($answer =~ "^ok") {
502: &logthis("$uname in $udom successfully changed their password ".
503: "on $server.");
504: } elsif ($answer =~ "^pwchange_failure") {
505: &logthis("$uname in $udom was unable to change their password ".
506: "on $server. The action was blocked by either lcpasswd ".
507: "or pwchange");
508: } elsif ($answer =~ "^non_authorized") {
509: &logthis("$uname in $udom did not get their password correct when ".
510: "attempting to change it on $server.");
511: } elsif ($answer =~ "^auth_mode_error") {
512: &logthis("$uname in $udom attempted to change their password despite ".
513: "not being locally or internally authenticated on $server.");
514: } elsif ($answer =~ "^unknown_user") {
515: &logthis("$uname in $udom attempted to change their password ".
516: "on $server but were unable to because $server is not ".
517: "their home server.");
518: } elsif ($answer =~ "^refused") {
519: &logthis("$server refused to change $uname in $udom password because ".
520: "it was sent an unencrypted request to change the password.");
521: }
522: return $answer;
523: }
524:
525: # ----------------------- Try to determine user's current authentication scheme
526:
527: sub queryauthenticate {
528: my ($uname,$udom)=@_;
529: my $uhome=&homeserver($uname,$udom);
530: if (!$uhome) {
531: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
532: return 'no_host';
533: }
534: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
535: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
536: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
537: }
538: return $answer;
539: }
540:
541: # --------- Try to authenticate user from domain's lib servers (first this one)
542:
543: sub authenticate {
544: my ($uname,$upass,$udom)=@_;
545: $upass=escape($upass);
546: $uname=~s/\W//g;
547: my $uhome=&homeserver($uname,$udom);
548: if (!$uhome) {
549: &logthis("User $uname at $udom is unknown in authenticate");
550: return 'no_host';
551: }
552: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
553: if ($answer eq 'authorized') {
554: &logthis("User $uname at $udom authorized by $uhome");
555: return $uhome;
556: }
557: if ($answer eq 'non_authorized') {
558: &logthis("User $uname at $udom rejected by $uhome");
559: return 'no_host';
560: }
561: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
562: return 'no_host';
563: }
564:
565: # ---------------------- Find the homebase for a user from domain's lib servers
566:
567: my %homecache;
568: sub homeserver {
569: my ($uname,$udom,$ignoreBadCache)=@_;
570: my $index="$uname:$udom";
571:
572: if (exists($homecache{$index})) { return $homecache{$index}; }
573: my $tryserver;
574: foreach $tryserver (keys %libserv) {
575: next if ($ignoreBadCache ne 'true' &&
576: exists($badServerCache{$tryserver}));
577: if ($hostdom{$tryserver} eq $udom) {
578: my $answer=reply("home:$udom:$uname",$tryserver);
579: if ($answer eq 'found') {
580: return $homecache{$index}=$tryserver;
581: } elsif ($answer eq 'no_host') {
582: $badServerCache{$tryserver}=1;
583: }
584: }
585: }
586: return 'no_host';
587: }
588:
589: # ------------------------------------- Find the usernames behind a list of IDs
590:
591: sub idget {
592: my ($udom,@ids)=@_;
593: my %returnhash=();
594:
595: my $tryserver;
596: foreach $tryserver (keys %libserv) {
597: if ($hostdom{$tryserver} eq $udom) {
598: my $idlist=join('&',@ids);
599: $idlist=~tr/A-Z/a-z/;
600: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
601: my @answer=();
602: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
603: @answer=split(/\&/,$reply);
604: } ;
605: my $i;
606: for ($i=0;$i<=$#ids;$i++) {
607: if ($answer[$i]) {
608: $returnhash{$ids[$i]}=$answer[$i];
609: }
610: }
611: }
612: }
613: return %returnhash;
614: }
615:
616: # ------------------------------------- Find the IDs behind a list of usernames
617:
618: sub idrget {
619: my ($udom,@unames)=@_;
620: my %returnhash=();
621: foreach (@unames) {
622: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
623: }
624: return %returnhash;
625: }
626:
627: # ------------------------------- Store away a list of names and associated IDs
628:
629: sub idput {
630: my ($udom,%ids)=@_;
631: my %servers=();
632: foreach (keys %ids) {
633: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
634: my $uhom=&homeserver($_,$udom);
635: if ($uhom ne 'no_host') {
636: my $id=&escape($ids{$_});
637: $id=~tr/A-Z/a-z/;
638: my $unam=&escape($_);
639: if ($servers{$uhom}) {
640: $servers{$uhom}.='&'.$id.'='.$unam;
641: } else {
642: $servers{$uhom}=$id.'='.$unam;
643: }
644: }
645: }
646: foreach (keys %servers) {
647: &critical('idput:'.$udom.':'.$servers{$_},$_);
648: }
649: }
650:
651: # --------------------------------------------------- Assign a key to a student
652:
653: sub assign_access_key {
654: #
655: # a valid key looks like uname:udom#comments
656: # comments are being appended
657: #
658: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
659: $kdom=
660: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($kdom));
661: $knum=
662: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($knum));
663: $cdom=
664: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
665: $cnum=
666: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
667: $udom=$env{'user.name'} unless (defined($udom));
668: $uname=$env{'user.domain'} unless (defined($uname));
669: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
670: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
671: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
672: # assigned to this person
673: # - this should not happen,
674: # unless something went wrong
675: # the first time around
676: # ready to assign
677: $logentry=$1.'; '.$logentry;
678: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
679: $kdom,$knum) eq 'ok') {
680: # key now belongs to user
681: my $envkey='key.'.$cdom.'_'.$cnum;
682: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
683: &appenv('environment.'.$envkey => $ckey);
684: return 'ok';
685: } else {
686: return
687: 'error: Count not permanently assign key, will need to be re-entered later.';
688: }
689: } else {
690: return 'error: Could not assign key, try again later.';
691: }
692: } elsif (!$existing{$ckey}) {
693: # the key does not exist
694: return 'error: The key does not exist';
695: } else {
696: # the key is somebody else's
697: return 'error: The key is already in use';
698: }
699: }
700:
701: # ------------------------------------------ put an additional comment on a key
702:
703: sub comment_access_key {
704: #
705: # a valid key looks like uname:udom#comments
706: # comments are being appended
707: #
708: my ($ckey,$cdom,$cnum,$logentry)=@_;
709: $cdom=
710: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
711: $cnum=
712: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
713: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
714: if ($existing{$ckey}) {
715: $existing{$ckey}.='; '.$logentry;
716: # ready to assign
717: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
718: $cdom,$cnum) eq 'ok') {
719: return 'ok';
720: } else {
721: return 'error: Count not store comment.';
722: }
723: } else {
724: # the key does not exist
725: return 'error: The key does not exist';
726: }
727: }
728:
729: # ------------------------------------------------------ Generate a set of keys
730:
731: sub generate_access_keys {
732: my ($number,$cdom,$cnum,$logentry)=@_;
733: $cdom=
734: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
735: $cnum=
736: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
737: unless (&allowed('mky',$cdom)) { return 0; }
738: unless (($cdom) && ($cnum)) { return 0; }
739: if ($number>10000) { return 0; }
740: sleep(2); # make sure don't get same seed twice
741: srand(time()^($$+($$<<15))); # from "Programming Perl"
742: my $total=0;
743: for (my $i=1;$i<=$number;$i++) {
744: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
745: sprintf("%lx",int(100000*rand)).'-'.
746: sprintf("%lx",int(100000*rand));
747: $newkey=~s/1/g/g; # folks mix up 1 and l
748: $newkey=~s/0/h/g; # and also 0 and O
749: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
750: if ($existing{$newkey}) {
751: $i--;
752: } else {
753: if (&put('accesskeys',
754: { $newkey => '# generated '.localtime().
755: ' by '.$env{'user.name'}.'@'.$env{'user.domain'}.
756: '; '.$logentry },
757: $cdom,$cnum) eq 'ok') {
758: $total++;
759: }
760: }
761: }
762: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
763: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
764: return $total;
765: }
766:
767: # ------------------------------------------------------- Validate an accesskey
768:
769: sub validate_access_key {
770: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
771: $cdom=
772: $env{'course.'.$env{'request.course.id'}.'.domain'} unless (defined($cdom));
773: $cnum=
774: $env{'course.'.$env{'request.course.id'}.'.num'} unless (defined($cnum));
775: $udom=$env{'user.domain'} unless (defined($udom));
776: $uname=$env{'user.name'} unless (defined($uname));
777: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
778: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
779: }
780:
781: # ------------------------------------- Find the section of student in a course
782: sub devalidate_getsection_cache {
783: my ($udom,$unam,$courseid)=@_;
784: $courseid=~s/\_/\//g;
785: $courseid=~s/^(\w)/\/$1/;
786: my $hashid="$udom:$unam:$courseid";
787: &devalidate_cache_new('getsection',$hashid);
788: }
789:
790: sub getsection {
791: my ($udom,$unam,$courseid)=@_;
792: my $cachetime=1800;
793: $courseid=~s/\_/\//g;
794: $courseid=~s/^(\w)/\/$1/;
795:
796: my $hashid="$udom:$unam:$courseid";
797: my ($result,$cached)=&is_cached_new('getsection',$hashid);
798: if (defined($cached)) { return $result; }
799:
800: my %Pending;
801: my %Expired;
802: #
803: # Each role can either have not started yet (pending), be active,
804: # or have expired.
805: #
806: # If there is an active role, we are done.
807: #
808: # If there is more than one role which has not started yet,
809: # choose the one which will start sooner
810: # If there is one role which has not started yet, return it.
811: #
812: # If there is more than one expired role, choose the one which ended last.
813: # If there is a role which has expired, return it.
814: #
815: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
816: &homeserver($unam,$udom)))) {
817: my ($key,$value)=split(/\=/,$_);
818: $key=&unescape($key);
819: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
820: my $section=$1;
821: if ($key eq $courseid.'_st') { $section=''; }
822: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
823: my $now=time;
824: if (defined($end) && $end && ($now > $end)) {
825: $Expired{$end}=$section;
826: next;
827: }
828: if (defined($start) && $start && ($now < $start)) {
829: $Pending{$start}=$section;
830: next;
831: }
832: return &do_cache_new('getsection',$hashid,$section,$cachetime);
833: }
834: #
835: # Presumedly there will be few matching roles from the above
836: # loop and the sorting time will be negligible.
837: if (scalar(keys(%Pending))) {
838: my ($time) = sort {$a <=> $b} keys(%Pending);
839: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
840: }
841: if (scalar(keys(%Expired))) {
842: my @sorted = sort {$a <=> $b} keys(%Expired);
843: my $time = pop(@sorted);
844: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
845: }
846: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
847: }
848:
849: sub save_cache {
850: my ($r)=@_;
851: if (! $r->is_initial_req()) { return DECLINED; }
852: &purge_remembered();
853: undef(%env);
854: return OK;
855: }
856:
857: my $to_remember=-1;
858: my %remembered;
859: my %accessed;
860: my $kicks=0;
861: my $hits=0;
862: sub devalidate_cache_new {
863: my ($name,$id,$debug) = @_;
864: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
865: $id=&escape($name.':'.$id);
866: $memcache->delete($id);
867: delete($remembered{$id});
868: delete($accessed{$id});
869: }
870:
871: sub is_cached_new {
872: my ($name,$id,$debug) = @_;
873: $id=&escape($name.':'.$id);
874: if (exists($remembered{$id})) {
875: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
876: $accessed{$id}=[&gettimeofday()];
877: $hits++;
878: return ($remembered{$id},1);
879: }
880: my $value = $memcache->get($id);
881: if (!(defined($value))) {
882: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
883: return (undef,undef);
884: }
885: if ($value eq '__undef__') {
886: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
887: $value=undef;
888: }
889: &make_room($id,$value,$debug);
890: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
891: return ($value,1);
892: }
893:
894: sub do_cache_new {
895: my ($name,$id,$value,$time,$debug) = @_;
896: $id=&escape($name.':'.$id);
897: my $setvalue=$value;
898: if (!defined($setvalue)) {
899: $setvalue='__undef__';
900: }
901: if (!defined($time) ) {
902: $time=600;
903: }
904: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
905: $memcache->set($id,$setvalue,$time);
906: # need to make a copy of $value
907: #&make_room($id,$value,$debug);
908: return $value;
909: }
910:
911: sub make_room {
912: my ($id,$value,$debug)=@_;
913: $remembered{$id}=$value;
914: if ($to_remember<0) { return; }
915: $accessed{$id}=[&gettimeofday()];
916: if (scalar(keys(%remembered)) <= $to_remember) { return; }
917: my $to_kick;
918: my $max_time=0;
919: foreach my $other (keys(%accessed)) {
920: if (&tv_interval($accessed{$other}) > $max_time) {
921: $to_kick=$other;
922: $max_time=&tv_interval($accessed{$other});
923: }
924: }
925: delete($remembered{$to_kick});
926: delete($accessed{$to_kick});
927: $kicks++;
928: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
929: return;
930: }
931:
932: sub purge_remembered {
933: #&logthis("Tossing ".scalar(keys(%remembered)));
934: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
935: undef(%remembered);
936: undef(%accessed);
937: }
938: # ------------------------------------- Read an entry from a user's environment
939:
940: sub userenvironment {
941: my ($udom,$unam,@what)=@_;
942: my %returnhash=();
943: my @answer=split(/\&/,
944: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
945: &homeserver($unam,$udom)));
946: my $i;
947: for ($i=0;$i<=$#what;$i++) {
948: $returnhash{$what[$i]}=&unescape($answer[$i]);
949: }
950: return %returnhash;
951: }
952:
953: # ---------------------------------------------------------- Get a studentphoto
954: sub studentphoto {
955: my ($udom,$unam,$ext) = @_;
956: my $home=&Apache::lonnet::homeserver($unam,$udom);
957: if (defined($env{'request.course.id'})) {
958: if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
959: if ($udom eq $env{'course.'.$env{'request.course.id'}.'.domain'}) {
960: return(&retrievestudentphoto($udom,$unam,$ext));
961: } else {
962: my ($result,$perm_reqd)=
963: &Apache::lonnet::auto_photo_permission($unam,$udom);
964: if ($result eq 'ok') {
965: if (!($perm_reqd eq 'yes')) {
966: return(&retrievestudentphoto($udom,$unam,$ext));
967: }
968: }
969: }
970: }
971: } else {
972: my ($result,$perm_reqd) =
973: &Apache::lonnet::auto_photo_permission($unam,$udom);
974: if ($result eq 'ok') {
975: if (!($perm_reqd eq 'yes')) {
976: return(&retrievestudentphoto($udom,$unam,$ext));
977: }
978: }
979: }
980: return '/adm/lonKaputt/lonlogo_broken.gif';
981: }
982:
983: sub retrievestudentphoto {
984: my ($udom,$unam,$ext,$type) = @_;
985: my $home=&Apache::lonnet::homeserver($unam,$udom);
986: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext:$type",$home);
987: if ($ret eq 'ok') {
988: my $url="/uploaded/$udom/$unam/internal/studentphoto.$ext";
989: if ($type eq 'thumbnail') {
990: $url="/uploaded/$udom/$unam/internal/studentphoto_tn.$ext";
991: }
992: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
993: return $tokenurl;
994: } else {
995: if ($type eq 'thumbnail') {
996: return '/adm/lonKaputt/genericstudent_tn.gif';
997: } else {
998: return '/adm/lonKaputt/lonlogo_broken.gif';
999: }
1000: }
1001: }
1002:
1003: # -------------------------------------------------------------------- New chat
1004:
1005: sub chatsend {
1006: my ($newentry,$anon)=@_;
1007: my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
1008: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1009: my $chome=$env{'course.'.$env{'request.course.id'}.'.home'};
1010: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1011: &escape($env{'user.domain'}.':'.$env{'user.name'}.':'.$anon.':'.
1012: &escape($newentry)),$chome);
1013: }
1014:
1015: # ------------------------------------------ Find current version of a resource
1016:
1017: sub getversion {
1018: my $fname=&clutter(shift);
1019: unless ($fname=~/^\/res\//) { return -1; }
1020: return ¤tversion(&filelocation('',$fname));
1021: }
1022:
1023: sub currentversion {
1024: my $fname=shift;
1025: my ($result,$cached)=&is_cached_new('resversion',$fname);
1026: if (defined($cached)) { return $result; }
1027: my $author=$fname;
1028: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1029: my ($udom,$uname)=split(/\//,$author);
1030: my $home=homeserver($uname,$udom);
1031: if ($home eq 'no_host') {
1032: return -1;
1033: }
1034: my $answer=reply("currentversion:$fname",$home);
1035: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1036: return -1;
1037: }
1038: return &do_cache_new('resversion',$fname,$answer,600);
1039: }
1040:
1041: # ----------------------------- Subscribe to a resource, return URL if possible
1042:
1043: sub subscribe {
1044: my $fname=shift;
1045: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1046: $fname=~s/[\n\r]//g;
1047: my $author=$fname;
1048: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1049: my ($udom,$uname)=split(/\//,$author);
1050: my $home=homeserver($uname,$udom);
1051: if ($home eq 'no_host') {
1052: return 'not_found';
1053: }
1054: my $answer=reply("sub:$fname",$home);
1055: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1056: $answer.=' by '.$home;
1057: }
1058: return $answer;
1059: }
1060:
1061: # -------------------------------------------------------------- Replicate file
1062:
1063: sub repcopy {
1064: my $filename=shift;
1065: $filename=~s/\/+/\//g;
1066: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1067: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1068: if ($filename=~m|^/home/httpd/html/userfiles/| or
1069: $filename=~m -^/*(uploaded|editupload)/-) {
1070: return &repcopy_userfile($filename);
1071: }
1072: $filename=~s/[\n\r]//g;
1073: my $transname="$filename.in.transfer";
1074: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1075: my $remoteurl=subscribe($filename);
1076: if ($remoteurl =~ /^con_lost by/) {
1077: &logthis("Subscribe returned $remoteurl: $filename");
1078: return 'unavailable';
1079: } elsif ($remoteurl eq 'not_found') {
1080: #&logthis("Subscribe returned not_found: $filename");
1081: return 'not_found';
1082: } elsif ($remoteurl =~ /^rejected by/) {
1083: &logthis("Subscribe returned $remoteurl: $filename");
1084: return 'forbidden';
1085: } elsif ($remoteurl eq 'directory') {
1086: return 'ok';
1087: } else {
1088: my $author=$filename;
1089: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1090: my ($udom,$uname)=split(/\//,$author);
1091: my $home=homeserver($uname,$udom);
1092: unless ($home eq $perlvar{'lonHostID'}) {
1093: my @parts=split(/\//,$filename);
1094: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1095: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1096: &logthis("Malconfiguration for replication: $filename");
1097: return 'bad_request';
1098: }
1099: my $count;
1100: for ($count=5;$count<$#parts;$count++) {
1101: $path.="/$parts[$count]";
1102: if ((-e $path)!=1) {
1103: mkdir($path,0777);
1104: }
1105: }
1106: my $ua=new LWP::UserAgent;
1107: my $request=new HTTP::Request('GET',"$remoteurl");
1108: my $response=$ua->request($request,$transname);
1109: if ($response->is_error()) {
1110: unlink($transname);
1111: my $message=$response->status_line;
1112: &logthis("<font color=\"blue\">WARNING:"
1113: ." LWP get: $message: $filename</font>");
1114: return 'unavailable';
1115: } else {
1116: if ($remoteurl!~/\.meta$/) {
1117: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1118: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1119: if ($mresponse->is_error()) {
1120: unlink($filename.'.meta');
1121: &logthis(
1122: "<font color=\"yellow\">INFO: No metadata: $filename</font>");
1123: }
1124: }
1125: rename($transname,$filename);
1126: return 'ok';
1127: }
1128: }
1129: }
1130: }
1131:
1132: # ------------------------------------------------ Get server side include body
1133: sub ssi_body {
1134: my ($filelink,%form)=@_;
1135: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1136: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1137: }
1138: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1139: &ssi($filelink,%form));
1140: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1141: $output=~s/^.*?\<body[^\>]*\>//si;
1142: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1143: return $output;
1144: }
1145:
1146: # --------------------------------------------------------- Server Side Include
1147:
1148: sub ssi {
1149:
1150: my ($fn,%form)=@_;
1151:
1152: my $ua=new LWP::UserAgent;
1153:
1154: my $request;
1155:
1156: $form{'no_update_last_known'}=1;
1157:
1158: if (%form) {
1159: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1160: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1161: } else {
1162: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1163: }
1164:
1165: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1166: my $response=$ua->request($request);
1167:
1168: return $response->content;
1169: }
1170:
1171: sub externalssi {
1172: my ($url)=@_;
1173: my $ua=new LWP::UserAgent;
1174: my $request=new HTTP::Request('GET',$url);
1175: my $response=$ua->request($request);
1176: return $response->content;
1177: }
1178:
1179: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1180:
1181: sub allowuploaded {
1182: my ($srcurl,$url)=@_;
1183: $url=&clutter(&declutter($url));
1184: my $dir=$url;
1185: $dir=~s/\/[^\/]+$//;
1186: my %httpref=();
1187: my $httpurl=&hreflocation('',$url);
1188: $httpref{'httpref.'.$httpurl}=$srcurl;
1189: &Apache::lonnet::appenv(%httpref);
1190: }
1191:
1192: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1193: # input: action, courseID, current domain, intended
1194: # path to file, source of file, instruction to parse file for objects,
1195: # ref to hash for embedded objects,
1196: # ref to hash for codebase of java objects.
1197: #
1198: # output: url to file (if action was uploaddoc),
1199: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1200: #
1201: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1202: # course.
1203: #
1204: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1205: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1206: # course's home server.
1207: #
1208: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1209: # be copied from $source (current location) to
1210: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1211: # and will then be copied to
1212: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1213: # course's home server.
1214: #
1215: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1216: # will be retrived from $env{form.uploaddoc} (from DOCS interface) to
1217: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1218: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1219: # in course's home server.
1220: #
1221:
1222: sub process_coursefile {
1223: my ($action,$docuname,$docudom,$file,$source,$parser,$allfiles,$codebase)=@_;
1224: my $fetchresult;
1225: my $home=&homeserver($docuname,$docudom);
1226: if ($action eq 'propagate') {
1227: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1228: $home);
1229: } else {
1230: my $fpath = '';
1231: my $fname = $file;
1232: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1233: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1234: my $filepath = &build_filepath($fpath);
1235: if ($action eq 'copy') {
1236: if ($source eq '') {
1237: $fetchresult = 'no source file';
1238: return $fetchresult;
1239: } else {
1240: my $destination = $filepath.'/'.$fname;
1241: rename($source,$destination);
1242: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1243: $home);
1244: }
1245: } elsif ($action eq 'uploaddoc') {
1246: open(my $fh,'>'.$filepath.'/'.$fname);
1247: print $fh $env{'form.'.$source};
1248: close($fh);
1249: if ($parser eq 'parse') {
1250: my $parse_result = &extract_embedded_items($filepath,$fname,$allfiles,$codebase);
1251: unless ($parse_result eq 'ok') {
1252: &logthis('Failed to parse '.$filepath.'/'.$fname.' for embedded media: '.$parse_result);
1253: }
1254: }
1255: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1256: $home);
1257: if ($fetchresult eq 'ok') {
1258: return '/uploaded/'.$fpath.'/'.$fname;
1259: } else {
1260: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1261: ' to host '.$home.': '.$fetchresult);
1262: return '/adm/notfound.html';
1263: }
1264: }
1265: }
1266: unless ( $fetchresult eq 'ok') {
1267: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1268: ' to host '.$home.': '.$fetchresult);
1269: }
1270: return $fetchresult;
1271: }
1272:
1273: sub build_filepath {
1274: my ($fpath) = @_;
1275: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1276: unless ($fpath eq '') {
1277: my @parts=split('/',$fpath);
1278: foreach my $part (@parts) {
1279: $filepath.= '/'.$part;
1280: if ((-e $filepath)!=1) {
1281: mkdir($filepath,0777);
1282: }
1283: }
1284: }
1285: return $filepath;
1286: }
1287:
1288: sub store_edited_file {
1289: my ($primary_url,$content,$docudom,$docuname,$fetchresult) = @_;
1290: my $file = $primary_url;
1291: $file =~ s#^/uploaded/$docudom/$docuname/##;
1292: my $fpath = '';
1293: my $fname = $file;
1294: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1295: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1296: my $filepath = &build_filepath($fpath);
1297: open(my $fh,'>'.$filepath.'/'.$fname);
1298: print $fh $content;
1299: close($fh);
1300: my $home=&homeserver($docuname,$docudom);
1301: $$fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1302: $home);
1303: if ($$fetchresult eq 'ok') {
1304: return '/uploaded/'.$fpath.'/'.$fname;
1305: } else {
1306: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1307: ' to host '.$home.': '.$$fetchresult);
1308: return '/adm/notfound.html';
1309: }
1310: }
1311:
1312: sub clean_filename {
1313: my ($fname)=@_;
1314: # Replace Windows backslashes by forward slashes
1315: $fname=~s/\\/\//g;
1316: # Get rid of everything but the actual filename
1317: $fname=~s/^.*\/([^\/]+)$/$1/;
1318: # Replace spaces by underscores
1319: $fname=~s/\s+/\_/g;
1320: # Replace all other weird characters by nothing
1321: $fname=~s/[^\w\.\-]//g;
1322: # Replace all .\d. sequences with _\d. so they no longer look like version
1323: # numbers
1324: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1325: return $fname;
1326: }
1327:
1328: # --------------- Take an uploaded file and put it into the userfiles directory
1329: # input: $formname - the contents of the file are in $env{"form.$formname"}
1330: # the desired filenam is in $env{"form.$formname.filename"}
1331: # $coursedoc - if true up to the current course
1332: # if false
1333: # $subdir - directory in userfile to store the file into
1334: # $parser, $allfiles, $codebase - unknown
1335: #
1336: # output: url of file in userspace, or error: <message>
1337: # or /adm/notfound.html if failure to upload occurse
1338:
1339:
1340: sub userfileupload {
1341: my ($formname,$coursedoc,$subdir,$parser,$allfiles,$codebase,$destuname,$destudom)=@_;
1342: if (!defined($subdir)) { $subdir='unknown'; }
1343: my $fname=$env{'form.'.$formname.'.filename'};
1344: $fname=&clean_filename($fname);
1345: # See if there is anything left
1346: unless ($fname) { return 'error: no uploaded file'; }
1347: chop($env{'form.'.$formname});
1348: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1349: my $now = time;
1350: my $filepath = 'tmp/helprequests/'.$now;
1351: my @parts=split(/\//,$filepath);
1352: my $fullpath = $perlvar{'lonDaemons'};
1353: for (my $i=0;$i<@parts;$i++) {
1354: $fullpath .= '/'.$parts[$i];
1355: if ((-e $fullpath)!=1) {
1356: mkdir($fullpath,0777);
1357: }
1358: }
1359: open(my $fh,'>'.$fullpath.'/'.$fname);
1360: print $fh $env{'form.'.$formname};
1361: close($fh);
1362: return $fullpath.'/'.$fname;
1363: }
1364:
1365: # Create the directory if not present
1366: $fname="$subdir/$fname";
1367: if ($coursedoc) {
1368: my $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1369: my $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1370: if ($env{'form.folder'} =~ m/^(default|supplemental)/) {
1371: return &finishuserfileupload($docuname,$docudom,
1372: $formname,$fname,$parser,$allfiles,
1373: $codebase);
1374: } else {
1375: $fname=$env{'form.folder'}.'/'.$fname;
1376: return &process_coursefile('uploaddoc',$docuname,$docudom,
1377: $fname,$formname,$parser,
1378: $allfiles,$codebase);
1379: }
1380: } elsif (defined($destuname)) {
1381: my $docuname=$destuname;
1382: my $docudom=$destudom;
1383: return &finishuserfileupload($docuname,$docudom,$formname,
1384: $fname,$parser,$allfiles,$codebase);
1385:
1386: } else {
1387: my $docuname=$env{'user.name'};
1388: my $docudom=$env{'user.domain'};
1389: if (exists($env{'form.group'})) {
1390: $docuname=$env{'course.'.$env{'request.course.id'}.'.num'};
1391: $docudom=$env{'course.'.$env{'request.course.id'}.'.domain'};
1392: }
1393: return &finishuserfileupload($docuname,$docudom,$formname,
1394: $fname,$parser,$allfiles,$codebase);
1395: }
1396: }
1397:
1398: sub finishuserfileupload {
1399: my ($docuname,$docudom,$formname,$fname,$parser,$allfiles,$codebase) = @_;
1400: my $path=$docudom.'/'.$docuname.'/';
1401: my $filepath=$perlvar{'lonDocRoot'};
1402: my ($fnamepath,$file);
1403: $file=$fname;
1404: if ($fname=~m|/|) {
1405: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1406: $path.=$fnamepath.'/';
1407: }
1408: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1409: my $count;
1410: for ($count=4;$count<=$#parts;$count++) {
1411: $filepath.="/$parts[$count]";
1412: if ((-e $filepath)!=1) {
1413: mkdir($filepath,0777);
1414: }
1415: }
1416: # Save the file
1417: {
1418: if (!open(FH,'>'.$filepath.'/'.$file)) {
1419: &logthis('Failed to create '.$filepath.'/'.$file);
1420: print STDERR ('Failed to create '.$filepath.'/'.$file."\n");
1421: return '/adm/notfound.html';
1422: }
1423: if (!print FH ($env{'form.'.$formname})) {
1424: &logthis('Failed to write to '.$filepath.'/'.$file);
1425: print STDERR ('Failed to write to '.$filepath.'/'.$file."\n");
1426: return '/adm/notfound.html';
1427: }
1428: close(FH);
1429: }
1430: if ($parser eq 'parse') {
1431: my $parse_result = &extract_embedded_items($filepath,$file,$allfiles,
1432: $codebase);
1433: unless ($parse_result eq 'ok') {
1434: &logthis('Failed to parse '.$filepath.$file.
1435: ' for embedded media: '.$parse_result);
1436: }
1437: }
1438: # Notify homeserver to grep it
1439: #
1440: my $docuhome=&homeserver($docuname,$docudom);
1441: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1442: if ($fetchresult eq 'ok') {
1443: #
1444: # Return the URL to it
1445: return '/uploaded/'.$path.$file;
1446: } else {
1447: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1448: ': '.$fetchresult);
1449: return '/adm/notfound.html';
1450: }
1451: }
1452:
1453: sub extract_embedded_items {
1454: my ($filepath,$file,$allfiles,$codebase,$content) = @_;
1455: my @state = ();
1456: my %javafiles = (
1457: codebase => '',
1458: code => '',
1459: archive => ''
1460: );
1461: my %mediafiles = (
1462: src => '',
1463: movie => '',
1464: );
1465: my $p;
1466: if ($content) {
1467: $p = HTML::LCParser->new($content);
1468: } else {
1469: $p = HTML::LCParser->new($filepath.'/'.$file);
1470: }
1471: while (my $t=$p->get_token()) {
1472: if ($t->[0] eq 'S') {
1473: my ($tagname, $attr) = ($t->[1],$t->[2]);
1474: push (@state, $tagname);
1475: if (lc($tagname) eq 'allow') {
1476: &add_filetype($allfiles,$attr->{'src'},'src');
1477: }
1478: if (lc($tagname) eq 'img') {
1479: &add_filetype($allfiles,$attr->{'src'},'src');
1480: }
1481: if (lc($tagname) eq 'script') {
1482: if ($attr->{'archive'} =~ /\.jar$/i) {
1483: &add_filetype($allfiles,$attr->{'archive'},'archive');
1484: } else {
1485: &add_filetype($allfiles,$attr->{'src'},'src');
1486: }
1487: }
1488: if (lc($tagname) eq 'link') {
1489: if (lc($attr->{'rel'}) eq 'stylesheet') {
1490: &add_filetype($allfiles,$attr->{'href'},'href');
1491: }
1492: }
1493: if (lc($tagname) eq 'object' ||
1494: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')) {
1495: foreach my $item (keys(%javafiles)) {
1496: $javafiles{$item} = '';
1497: }
1498: }
1499: if (lc($state[-2]) eq 'object' && lc($tagname) eq 'param') {
1500: my $name = lc($attr->{'name'});
1501: foreach my $item (keys(%javafiles)) {
1502: if ($name eq $item) {
1503: $javafiles{$item} = $attr->{'value'};
1504: last;
1505: }
1506: }
1507: foreach my $item (keys(%mediafiles)) {
1508: if ($name eq $item) {
1509: &add_filetype($allfiles, $attr->{'value'}, 'value');
1510: last;
1511: }
1512: }
1513: }
1514: if (lc($tagname) eq 'embed' || lc($tagname) eq 'applet') {
1515: foreach my $item (keys(%javafiles)) {
1516: if ($attr->{$item}) {
1517: $javafiles{$item} = $attr->{$item};
1518: last;
1519: }
1520: }
1521: foreach my $item (keys(%mediafiles)) {
1522: if ($attr->{$item}) {
1523: &add_filetype($allfiles,$attr->{$item},$item);
1524: last;
1525: }
1526: }
1527: }
1528: } elsif ($t->[0] eq 'E') {
1529: my ($tagname) = ($t->[1]);
1530: if ($javafiles{'codebase'} ne '') {
1531: $javafiles{'codebase'} .= '/';
1532: }
1533: if (lc($tagname) eq 'applet' ||
1534: lc($tagname) eq 'object' ||
1535: (lc($tagname) eq 'embed' && lc($state[-2]) ne 'object')
1536: ) {
1537: foreach my $item (keys(%javafiles)) {
1538: if ($item ne 'codebase' && $javafiles{$item} ne '') {
1539: my $file=$javafiles{'codebase'}.$javafiles{$item};
1540: &add_filetype($allfiles,$file,$item);
1541: }
1542: }
1543: }
1544: pop @state;
1545: }
1546: }
1547: return 'ok';
1548: }
1549:
1550: sub add_filetype {
1551: my ($allfiles,$file,$type)=@_;
1552: if (exists($allfiles->{$file})) {
1553: unless (grep/^\Q$type\E$/, @{$allfiles->{$file}}) {
1554: push(@{$allfiles->{$file}}, &escape($type));
1555: }
1556: } else {
1557: @{$allfiles->{$file}} = (&escape($type));
1558: }
1559: }
1560:
1561: sub removeuploadedurl {
1562: my ($url)=@_;
1563: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1564: return &removeuserfile($uname,$udom,$fname);
1565: }
1566:
1567: sub removeuserfile {
1568: my ($docuname,$docudom,$fname)=@_;
1569: my $home=&homeserver($docuname,$docudom);
1570: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1571: }
1572:
1573: sub mkdiruserfile {
1574: my ($docuname,$docudom,$dir)=@_;
1575: my $home=&homeserver($docuname,$docudom);
1576: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1577: }
1578:
1579: sub renameuserfile {
1580: my ($docuname,$docudom,$old,$new)=@_;
1581: my $home=&homeserver($docuname,$docudom);
1582: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1583: &escape("$new"),$home);
1584: }
1585:
1586: # ------------------------------------------------------------------------- Log
1587:
1588: sub log {
1589: my ($dom,$nam,$hom,$what)=@_;
1590: return critical("log:$dom:$nam:$what",$hom);
1591: }
1592:
1593: # ------------------------------------------------------------------ Course Log
1594: #
1595: # This routine flushes several buffers of non-mission-critical nature
1596: #
1597:
1598: sub flushcourselogs {
1599: &logthis('Flushing log buffers');
1600: #
1601: # course logs
1602: # This is a log of all transactions in a course, which can be used
1603: # for data mining purposes
1604: #
1605: # It also collects the courseid database, which lists last transaction
1606: # times and course titles for all courseids
1607: #
1608: my %courseidbuffer=();
1609: foreach (keys %courselogs) {
1610: my $crsid=$_;
1611: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1612: &escape($courselogs{$crsid}),
1613: $coursehombuf{$crsid}) eq 'ok') {
1614: delete $courselogs{$crsid};
1615: } else {
1616: &logthis('Failed to flush log buffer for '.$crsid);
1617: if (length($courselogs{$crsid})>40000) {
1618: &logthis("<font color=\"blue\">WARNING: Buffer for ".$crsid.
1619: " exceeded maximum size, deleting.</font>");
1620: delete $courselogs{$crsid};
1621: }
1622: }
1623: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1624: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1625: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1626: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1627: } else {
1628: $courseidbuffer{$coursehombuf{$crsid}}=
1629: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1630: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1631: }
1632: }
1633: #
1634: # Write course id database (reverse lookup) to homeserver of courses
1635: # Is used in pickcourse
1636: #
1637: foreach (keys %courseidbuffer) {
1638: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1639: }
1640: #
1641: # File accesses
1642: # Writes to the dynamic metadata of resources to get hit counts, etc.
1643: #
1644: foreach my $entry (keys(%accesshash)) {
1645: if ($entry =~ /___count$/) {
1646: my ($dom,$name);
1647: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1648: if (! defined($dom) || $dom eq '' ||
1649: ! defined($name) || $name eq '') {
1650: my $cid = $env{'request.course.id'};
1651: $dom = $env{'request.'.$cid.'.domain'};
1652: $name = $env{'request.'.$cid.'.num'};
1653: }
1654: my $value = $accesshash{$entry};
1655: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1656: my %temphash=($url => $value);
1657: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1658: if ($result eq 'ok') {
1659: delete $accesshash{$entry};
1660: } elsif ($result eq 'unknown_cmd') {
1661: # Target server has old code running on it.
1662: my %temphash=($entry => $value);
1663: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1664: delete $accesshash{$entry};
1665: }
1666: }
1667: } else {
1668: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1669: my %temphash=($entry => $accesshash{$entry});
1670: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1671: delete $accesshash{$entry};
1672: }
1673: }
1674: }
1675: #
1676: # Roles
1677: # Reverse lookup of user roles for course faculty/staff and co-authorship
1678: #
1679: foreach (keys %userrolehash) {
1680: my $entry=$_;
1681: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1682: split(/\:/,$entry);
1683: if (&Apache::lonnet::put('nohist_userroles',
1684: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1685: $rudom,$runame) eq 'ok') {
1686: delete $userrolehash{$entry};
1687: }
1688: }
1689: #
1690: # Reverse lookup of domain roles (dc, ad, li, sc, au)
1691: #
1692: my %domrolebuffer = ();
1693: foreach my $entry (keys %domainrolehash) {
1694: my ($role,$uname,$udom,$runame,$rudom,$rsec)=split/:/,$entry;
1695: if ($domrolebuffer{$rudom}) {
1696: $domrolebuffer{$rudom}.='&'.&escape($entry).
1697: '='.&escape($domainrolehash{$entry});
1698: } else {
1699: $domrolebuffer{$rudom}.=&escape($entry).
1700: '='.&escape($domainrolehash{$entry});
1701: }
1702: delete $domainrolehash{$entry};
1703: }
1704: foreach my $dom (keys(%domrolebuffer)) {
1705: foreach my $tryserver (keys %libserv) {
1706: if ($hostdom{$tryserver} eq $dom) {
1707: unless (&reply('domroleput:'.$dom.':'.
1708: $domrolebuffer{$dom},$tryserver) eq 'ok') {
1709: &logthis('Put of domain roles failed for '.$dom.' and '.$tryserver);
1710: }
1711: }
1712: }
1713: }
1714: $dumpcount++;
1715: }
1716:
1717: sub courselog {
1718: my $what=shift;
1719: $what=time.':'.$what;
1720: unless ($env{'request.course.id'}) { return ''; }
1721: $coursedombuf{$env{'request.course.id'}}=
1722: $env{'course.'.$env{'request.course.id'}.'.domain'};
1723: $coursenumbuf{$env{'request.course.id'}}=
1724: $env{'course.'.$env{'request.course.id'}.'.num'};
1725: $coursehombuf{$env{'request.course.id'}}=
1726: $env{'course.'.$env{'request.course.id'}.'.home'};
1727: $coursedescrbuf{$env{'request.course.id'}}=
1728: $env{'course.'.$env{'request.course.id'}.'.description'};
1729: $courseinstcodebuf{$env{'request.course.id'}}=
1730: $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
1731: $courseownerbuf{$env{'request.course.id'}}=
1732: $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
1733: if (defined $courselogs{$env{'request.course.id'}}) {
1734: $courselogs{$env{'request.course.id'}}.='&'.$what;
1735: } else {
1736: $courselogs{$env{'request.course.id'}}.=$what;
1737: }
1738: if (length($courselogs{$env{'request.course.id'}})>4048) {
1739: &flushcourselogs();
1740: }
1741: }
1742:
1743: sub courseacclog {
1744: my $fnsymb=shift;
1745: unless ($env{'request.course.id'}) { return ''; }
1746: my $what=$fnsymb.':'.$env{'user.name'}.':'.$env{'user.domain'};
1747: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|task|page)$/) {
1748: $what.=':POST';
1749: # FIXME: Probably ought to escape things....
1750: foreach (keys %env) {
1751: if ($_=~/^form\.(.*)/) {
1752: $what.=':'.$1.'='.$env{$_};
1753: }
1754: }
1755: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1756: # FIXME: We should not be depending on a form parameter that someone
1757: # editing lonsearchcat.pm might change in the future.
1758: if ($env{'form.phase'} eq 'course_search') {
1759: $what.= ':POST';
1760: # FIXME: Probably ought to escape things....
1761: foreach my $element ('courseexp','crsfulltext','crsrelated',
1762: 'crsdiscuss') {
1763: $what.=':'.$element.'='.$env{'form.'.$element};
1764: }
1765: }
1766: }
1767: &courselog($what);
1768: }
1769:
1770: sub countacc {
1771: my $url=&declutter(shift);
1772: return if (! defined($url) || $url eq '');
1773: unless ($env{'request.course.id'}) { return ''; }
1774: $accesshash{$env{'request.course.id'}.'___'.$url.'___course'}=1;
1775: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1776: $accesshash{$key}++;
1777: }
1778:
1779: sub linklog {
1780: my ($from,$to)=@_;
1781: $from=&declutter($from);
1782: $to=&declutter($to);
1783: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1784: $accesshash{$to.'___'.$from.'___goto'}=1;
1785: }
1786:
1787: sub userrolelog {
1788: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1789: if (($trole=~/^ca/) || ($trole=~/^aa/) ||
1790: ($trole=~/^in/) || ($trole=~/^cc/) ||
1791: ($trole=~/^ep/) || ($trole=~/^cr/) ||
1792: ($trole=~/^ta/)) {
1793: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1794: $userrolehash
1795: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1796: =$tend.':'.$tstart;
1797: }
1798: if (($trole=~/^dc/) || ($trole=~/^ad/) ||
1799: ($trole=~/^li/) || ($trole=~/^li/) ||
1800: ($trole=~/^au/) || ($trole=~/^dg/) ||
1801: ($trole=~/^sc/)) {
1802: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1803: $domainrolehash
1804: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1805: = $tend.':'.$tstart;
1806: }
1807: }
1808:
1809: sub get_course_adv_roles {
1810: my $cid=shift;
1811: $cid=$env{'request.course.id'} unless (defined($cid));
1812: my %coursehash=&coursedescription($cid);
1813: my %nothide=();
1814: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1815: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1816: }
1817: my %returnhash=();
1818: my %dumphash=
1819: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1820: my $now=time;
1821: foreach (keys %dumphash) {
1822: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1823: if (($tstart) && ($tstart<0)) { next; }
1824: if (($tend) && ($tend<$now)) { next; }
1825: if (($tstart) && ($now<$tstart)) { next; }
1826: my ($role,$username,$domain,$section)=split(/\:/,$_);
1827: if ($username eq '' || $domain eq '') { next; }
1828: if ((&privileged($username,$domain)) &&
1829: (!$nothide{$username.':'.$domain})) { next; }
1830: if ($role eq 'cr') { next; }
1831: my $key=&plaintext($role);
1832: if ($role =~ /^cr/) {
1833: $key=(split('/',$role))[3];
1834: }
1835: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1836: if ($returnhash{$key}) {
1837: $returnhash{$key}.=','.$username.':'.$domain;
1838: } else {
1839: $returnhash{$key}=$username.':'.$domain;
1840: }
1841: }
1842: return %returnhash;
1843: }
1844:
1845: sub get_my_roles {
1846: my ($uname,$udom)=@_;
1847: unless (defined($uname)) { $uname=$env{'user.name'}; }
1848: unless (defined($udom)) { $udom=$env{'user.domain'}; }
1849: my %dumphash=
1850: &dump('nohist_userroles',$udom,$uname);
1851: my %returnhash=();
1852: my $now=time;
1853: foreach (keys %dumphash) {
1854: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1855: if (($tstart) && ($tstart<0)) { next; }
1856: if (($tend) && ($tend<$now)) { next; }
1857: if (($tstart) && ($now<$tstart)) { next; }
1858: my ($role,$username,$domain,$section)=split(/\:/,$_);
1859: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1860: }
1861: return %returnhash;
1862: }
1863:
1864: # ----------------------------------------------------- Frontpage Announcements
1865: #
1866: #
1867:
1868: sub postannounce {
1869: my ($server,$text)=@_;
1870: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1871: unless ($text=~/\w/) { $text=''; }
1872: return &reply('setannounce:'.&escape($text),$server);
1873: }
1874:
1875: sub getannounce {
1876:
1877: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1878: my $announcement='';
1879: while (<$fh>) { $announcement .=$_; }
1880: close($fh);
1881: if ($announcement=~/\w/) {
1882: return
1883: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1884: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1885: } else {
1886: return '';
1887: }
1888: } else {
1889: return '';
1890: }
1891: }
1892:
1893: # ---------------------------------------------------------- Course ID routines
1894: # Deal with domain's nohist_courseid.db files
1895: #
1896:
1897: sub courseidput {
1898: my ($domain,$what,$coursehome)=@_;
1899: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1900: }
1901:
1902: sub courseiddump {
1903: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$coursefilter,$hostidflag,$hostidref)=@_;
1904: my %returnhash=();
1905: unless ($domfilter) { $domfilter=''; }
1906: foreach my $tryserver (keys %libserv) {
1907: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1908: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1909: foreach (
1910: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1911: $sincefilter.':'.&escape($descfilter).':'.
1912: &escape($instcodefilter).':'.&escape($ownerfilter).':'.&escape($coursefilter),
1913: $tryserver))) {
1914: my ($key,$value)=split(/\=/,$_);
1915: if (($key) && ($value)) {
1916: $returnhash{&unescape($key)}=$value;
1917: }
1918: }
1919: }
1920: }
1921: }
1922: return %returnhash;
1923: }
1924:
1925: # ---------------------------------------------------------- DC e-mail
1926:
1927: sub dcmailput {
1928: my ($domain,$msgid,$message,$server)=@_;
1929: my $status = &Apache::lonnet::critical(
1930: 'dcmailput:'.$domain.':'.&Apache::lonnet::escape($msgid).'='.
1931: &Apache::lonnet::escape($message),$server);
1932: return $status;
1933: }
1934:
1935: sub dcmaildump {
1936: my ($dom,$startdate,$enddate,$senders) = @_;
1937: my %returnhash=();
1938: if (exists($domain_primary{$dom})) {
1939: my $cmd='dcmaildump:'.$dom.':'.&escape($startdate).':'.
1940: &escape($enddate).':';
1941: my @esc_senders=map { &escape($_)} @$senders;
1942: $cmd.=&escape(join('&',@esc_senders));
1943: foreach (split(/\&/,&reply($cmd,$domain_primary{$dom}))) {
1944: my ($key,$value) = split(/\=/,$_);
1945: if (($key) && ($value)) {
1946: $returnhash{&unescape($key)} = &unescape($value);
1947: }
1948: }
1949: }
1950: return %returnhash;
1951: }
1952: # ---------------------------------------------------------- Domain roles
1953:
1954: sub get_domain_roles {
1955: my ($dom,$roles,$startdate,$enddate)=@_;
1956: if (undef($startdate) || $startdate eq '') {
1957: $startdate = '.';
1958: }
1959: if (undef($enddate) || $enddate eq '') {
1960: $enddate = '.';
1961: }
1962: my $rolelist = join(':',@{$roles});
1963: my %personnel = ();
1964: foreach my $tryserver (keys(%libserv)) {
1965: if ($hostdom{$tryserver} eq $dom) {
1966: %{$personnel{$tryserver}}=();
1967: foreach (
1968: split(/\&/,&reply('domrolesdump:'.$dom.':'.
1969: &escape($startdate).':'.&escape($enddate).':'.
1970: &escape($rolelist), $tryserver))) {
1971: my($key,$value) = split(/\=/,$_);
1972: if (($key) && ($value)) {
1973: $personnel{$tryserver}{&unescape($key)} = &unescape($value);
1974: }
1975: }
1976: }
1977: }
1978: return %personnel;
1979: }
1980:
1981: # ----------------------------------------------------------- Check out an item
1982:
1983: sub get_first_access {
1984: my ($type,$argsymb)=@_;
1985: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1986: if ($argsymb) { $symb=$argsymb; }
1987: my ($map,$id,$res)=&decode_symb($symb);
1988: if ($type eq 'map') {
1989: $res=&symbread($map);
1990: } else {
1991: $res=$symb;
1992: }
1993: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
1994: return $times{"$courseid\0$res"};
1995: }
1996:
1997: sub set_first_access {
1998: my ($type)=@_;
1999: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
2000: my ($map,$id,$res)=&decode_symb($symb);
2001: if ($type eq 'map') {
2002: $res=&symbread($map);
2003: } else {
2004: $res=$symb;
2005: }
2006: my $firstaccess=&get_first_access($type,$symb);
2007: if (!$firstaccess) {
2008: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
2009: }
2010: return 'already_set';
2011: }
2012:
2013: sub checkout {
2014: my ($symb,$tuname,$tudom,$tcrsid)=@_;
2015: my $now=time;
2016: my $lonhost=$perlvar{'lonHostID'};
2017: my $infostr=&escape(
2018: 'CHECKOUTTOKEN&'.
2019: $tuname.'&'.
2020: $tudom.'&'.
2021: $tcrsid.'&'.
2022: $symb.'&'.
2023: $now.'&'.$ENV{'REMOTE_ADDR'});
2024: my $token=&reply('tmpput:'.$infostr,$lonhost);
2025: if ($token=~/^error\:/) {
2026: &logthis("<font color=\"blue\">WARNING: ".
2027: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
2028: "</font>");
2029: return '';
2030: }
2031:
2032: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
2033: $token=~tr/a-z/A-Z/;
2034:
2035: my %infohash=('resource.0.outtoken' => $token,
2036: 'resource.0.checkouttime' => $now,
2037: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
2038:
2039: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2040: return '';
2041: } else {
2042: &logthis("<font color=\"blue\">WARNING: ".
2043: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
2044: "</font>");
2045: }
2046:
2047: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2048: &escape('Checkout '.$infostr.' - '.
2049: $token)) ne 'ok') {
2050: return '';
2051: } else {
2052: &logthis("<font color=\"blue\">WARNING: ".
2053: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
2054: "</font>");
2055: }
2056: return $token;
2057: }
2058:
2059: # ------------------------------------------------------------ Check in an item
2060:
2061: sub checkin {
2062: my $token=shift;
2063: my $now=time;
2064: my ($ta,$tb,$lonhost)=split(/\*/,$token);
2065: $lonhost=~tr/A-Z/a-z/;
2066: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
2067: $dtoken=~s/\W/\_/g;
2068: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
2069: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
2070:
2071: unless (($tuname) && ($tudom)) {
2072: &logthis('Check in '.$token.' ('.$dtoken.') failed');
2073: return '';
2074: }
2075:
2076: unless (&allowed('mgr',$tcrsid)) {
2077: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
2078: $env{'user.name'}.' - '.$env{'user.domain'});
2079: return '';
2080: }
2081:
2082: my %infohash=('resource.0.intoken' => $token,
2083: 'resource.0.checkintime' => $now,
2084: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
2085:
2086: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
2087: return '';
2088: }
2089:
2090: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
2091: &escape('Checkin - '.$token)) ne 'ok') {
2092: return '';
2093: }
2094:
2095: return ($symb,$tuname,$tudom,$tcrsid);
2096: }
2097:
2098: # --------------------------------------------- Set Expire Date for Spreadsheet
2099:
2100: sub expirespread {
2101: my ($uname,$udom,$stype,$usymb)=@_;
2102: my $cid=$env{'request.course.id'};
2103: if ($cid) {
2104: my $now=time;
2105: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
2106: return &reply('put:'.$env{'course.'.$cid.'.domain'}.':'.
2107: $env{'course.'.$cid.'.num'}.
2108: ':nohist_expirationdates:'.
2109: &escape($key).'='.$now,
2110: $env{'course.'.$cid.'.home'})
2111: }
2112: return 'ok';
2113: }
2114:
2115: # ----------------------------------------------------- Devalidate Spreadsheets
2116:
2117: sub devalidate {
2118: my ($symb,$uname,$udom)=@_;
2119: my $cid=$env{'request.course.id'};
2120: if ($cid) {
2121: # delete the stored spreadsheets for
2122: # - the student level sheet of this user in course's homespace
2123: # - the assessment level sheet for this resource
2124: # for this user in user's homespace
2125: # - current conditional state info
2126: my $key=$uname.':'.$udom.':';
2127: my $status=
2128: &del('nohist_calculatedsheets',
2129: [$key.'studentcalc:'],
2130: $env{'course.'.$cid.'.domain'},
2131: $env{'course.'.$cid.'.num'})
2132: .' '.
2133: &del('nohist_calculatedsheets_'.$cid,
2134: [$key.'assesscalc:'.$symb],$udom,$uname);
2135: unless ($status eq 'ok ok') {
2136: &logthis('Could not devalidate spreadsheet '.
2137: $uname.' at '.$udom.' for '.
2138: $symb.': '.$status);
2139: }
2140: &delenv('user.state.'.$cid);
2141: }
2142: }
2143:
2144: sub get_scalar {
2145: my ($string,$end) = @_;
2146: my $value;
2147: if ($$string =~ s/^([^&]*?)($end)/$2/) {
2148: $value = $1;
2149: } elsif ($$string =~ s/^([^&]*?)&//) {
2150: $value = $1;
2151: }
2152: return &unescape($value);
2153: }
2154:
2155: sub array2str {
2156: my (@array) = @_;
2157: my $result=&arrayref2str(\@array);
2158: $result=~s/^__ARRAY_REF__//;
2159: $result=~s/__END_ARRAY_REF__$//;
2160: return $result;
2161: }
2162:
2163: sub arrayref2str {
2164: my ($arrayref) = @_;
2165: my $result='__ARRAY_REF__';
2166: foreach my $elem (@$arrayref) {
2167: if(ref($elem) eq 'ARRAY') {
2168: $result.=&arrayref2str($elem).'&';
2169: } elsif(ref($elem) eq 'HASH') {
2170: $result.=&hashref2str($elem).'&';
2171: } elsif(ref($elem)) {
2172: #print("Got a ref of ".(ref($elem))." skipping.");
2173: } else {
2174: $result.=&escape($elem).'&';
2175: }
2176: }
2177: $result=~s/\&$//;
2178: $result .= '__END_ARRAY_REF__';
2179: return $result;
2180: }
2181:
2182: sub hash2str {
2183: my (%hash) = @_;
2184: my $result=&hashref2str(\%hash);
2185: $result=~s/^__HASH_REF__//;
2186: $result=~s/__END_HASH_REF__$//;
2187: return $result;
2188: }
2189:
2190: sub hashref2str {
2191: my ($hashref)=@_;
2192: my $result='__HASH_REF__';
2193: foreach (sort(keys(%$hashref))) {
2194: if (ref($_) eq 'ARRAY') {
2195: $result.=&arrayref2str($_).'=';
2196: } elsif (ref($_) eq 'HASH') {
2197: $result.=&hashref2str($_).'=';
2198: } elsif (ref($_)) {
2199: $result.='=';
2200: #print("Got a ref of ".(ref($_))." skipping.");
2201: } else {
2202: if ($_) {$result.=&escape($_).'=';} else { last; }
2203: }
2204:
2205: if(ref($hashref->{$_}) eq 'ARRAY') {
2206: $result.=&arrayref2str($hashref->{$_}).'&';
2207: } elsif(ref($hashref->{$_}) eq 'HASH') {
2208: $result.=&hashref2str($hashref->{$_}).'&';
2209: } elsif(ref($hashref->{$_})) {
2210: $result.='&';
2211: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2212: } else {
2213: $result.=&escape($hashref->{$_}).'&';
2214: }
2215: }
2216: $result=~s/\&$//;
2217: $result .= '__END_HASH_REF__';
2218: return $result;
2219: }
2220:
2221: sub str2hash {
2222: my ($string)=@_;
2223: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2224: return %$hash;
2225: }
2226:
2227: sub str2hashref {
2228: my ($string) = @_;
2229:
2230: my %hash;
2231:
2232: if($string !~ /^__HASH_REF__/) {
2233: if (! ($string eq '' || !defined($string))) {
2234: $hash{'error'}='Not hash reference';
2235: }
2236: return (\%hash, $string);
2237: }
2238:
2239: $string =~ s/^__HASH_REF__//;
2240:
2241: while($string !~ /^__END_HASH_REF__/) {
2242: #key
2243: my $key='';
2244: if($string =~ /^__HASH_REF__/) {
2245: ($key, $string)=&str2hashref($string);
2246: if(defined($key->{'error'})) {
2247: $hash{'error'}='Bad data';
2248: return (\%hash, $string);
2249: }
2250: } elsif($string =~ /^__ARRAY_REF__/) {
2251: ($key, $string)=&str2arrayref($string);
2252: if($key->[0] eq 'Array reference error') {
2253: $hash{'error'}='Bad data';
2254: return (\%hash, $string);
2255: }
2256: } else {
2257: $string =~ s/^(.*?)=//;
2258: $key=&unescape($1);
2259: }
2260: $string =~ s/^=//;
2261:
2262: #value
2263: my $value='';
2264: if($string =~ /^__HASH_REF__/) {
2265: ($value, $string)=&str2hashref($string);
2266: if(defined($value->{'error'})) {
2267: $hash{'error'}='Bad data';
2268: return (\%hash, $string);
2269: }
2270: } elsif($string =~ /^__ARRAY_REF__/) {
2271: ($value, $string)=&str2arrayref($string);
2272: if($value->[0] eq 'Array reference error') {
2273: $hash{'error'}='Bad data';
2274: return (\%hash, $string);
2275: }
2276: } else {
2277: $value=&get_scalar(\$string,'__END_HASH_REF__');
2278: }
2279: $string =~ s/^&//;
2280:
2281: $hash{$key}=$value;
2282: }
2283:
2284: $string =~ s/^__END_HASH_REF__//;
2285:
2286: return (\%hash, $string);
2287: }
2288:
2289: sub str2array {
2290: my ($string)=@_;
2291: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2292: return @$array;
2293: }
2294:
2295: sub str2arrayref {
2296: my ($string) = @_;
2297: my @array;
2298:
2299: if($string !~ /^__ARRAY_REF__/) {
2300: if (! ($string eq '' || !defined($string))) {
2301: $array[0]='Array reference error';
2302: }
2303: return (\@array, $string);
2304: }
2305:
2306: $string =~ s/^__ARRAY_REF__//;
2307:
2308: while($string !~ /^__END_ARRAY_REF__/) {
2309: my $value='';
2310: if($string =~ /^__HASH_REF__/) {
2311: ($value, $string)=&str2hashref($string);
2312: if(defined($value->{'error'})) {
2313: $array[0] ='Array reference error';
2314: return (\@array, $string);
2315: }
2316: } elsif($string =~ /^__ARRAY_REF__/) {
2317: ($value, $string)=&str2arrayref($string);
2318: if($value->[0] eq 'Array reference error') {
2319: $array[0] ='Array reference error';
2320: return (\@array, $string);
2321: }
2322: } else {
2323: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2324: }
2325: $string =~ s/^&//;
2326:
2327: push(@array, $value);
2328: }
2329:
2330: $string =~ s/^__END_ARRAY_REF__//;
2331:
2332: return (\@array, $string);
2333: }
2334:
2335: # -------------------------------------------------------------------Temp Store
2336:
2337: sub tmpreset {
2338: my ($symb,$namespace,$domain,$stuname) = @_;
2339: if (!$symb) {
2340: $symb=&symbread();
2341: if (!$symb) { $symb= $env{'request.url'}; }
2342: }
2343: $symb=escape($symb);
2344:
2345: if (!$namespace) { $namespace=$env{'request.state'}; }
2346: $namespace=~s/\//\_/g;
2347: $namespace=~s/\W//g;
2348:
2349: if (!$domain) { $domain=$env{'user.domain'}; }
2350: if (!$stuname) { $stuname=$env{'user.name'}; }
2351: if ($domain eq 'public' && $stuname eq 'public') {
2352: $stuname=$ENV{'REMOTE_ADDR'};
2353: }
2354: my $path=$perlvar{'lonDaemons'}.'/tmp';
2355: my %hash;
2356: if (tie(%hash,'GDBM_File',
2357: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2358: &GDBM_WRCREAT(),0640)) {
2359: foreach my $key (keys %hash) {
2360: if ($key=~ /:$symb/) {
2361: delete($hash{$key});
2362: }
2363: }
2364: }
2365: }
2366:
2367: sub tmpstore {
2368: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2369:
2370: if (!$symb) {
2371: $symb=&symbread();
2372: if (!$symb) { $symb= $env{'request.url'}; }
2373: }
2374: $symb=escape($symb);
2375:
2376: if (!$namespace) {
2377: # I don't think we would ever want to store this for a course.
2378: # it seems this will only be used if we don't have a course.
2379: #$namespace=$env{'request.course.id'};
2380: #if (!$namespace) {
2381: $namespace=$env{'request.state'};
2382: #}
2383: }
2384: $namespace=~s/\//\_/g;
2385: $namespace=~s/\W//g;
2386: if (!$domain) { $domain=$env{'user.domain'}; }
2387: if (!$stuname) { $stuname=$env{'user.name'}; }
2388: if ($domain eq 'public' && $stuname eq 'public') {
2389: $stuname=$ENV{'REMOTE_ADDR'};
2390: }
2391: my $now=time;
2392: my %hash;
2393: my $path=$perlvar{'lonDaemons'}.'/tmp';
2394: if (tie(%hash,'GDBM_File',
2395: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2396: &GDBM_WRCREAT(),0640)) {
2397: $hash{"version:$symb"}++;
2398: my $version=$hash{"version:$symb"};
2399: my $allkeys='';
2400: foreach my $key (keys(%$storehash)) {
2401: $allkeys.=$key.':';
2402: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2403: }
2404: $hash{"$version:$symb:timestamp"}=$now;
2405: $allkeys.='timestamp';
2406: $hash{"$version:keys:$symb"}=$allkeys;
2407: if (untie(%hash)) {
2408: return 'ok';
2409: } else {
2410: return "error:$!";
2411: }
2412: } else {
2413: return "error:$!";
2414: }
2415: }
2416:
2417: # -----------------------------------------------------------------Temp Restore
2418:
2419: sub tmprestore {
2420: my ($symb,$namespace,$domain,$stuname) = @_;
2421:
2422: if (!$symb) {
2423: $symb=&symbread();
2424: if (!$symb) { $symb= $env{'request.url'}; }
2425: }
2426: $symb=escape($symb);
2427:
2428: if (!$namespace) { $namespace=$env{'request.state'}; }
2429:
2430: if (!$domain) { $domain=$env{'user.domain'}; }
2431: if (!$stuname) { $stuname=$env{'user.name'}; }
2432: if ($domain eq 'public' && $stuname eq 'public') {
2433: $stuname=$ENV{'REMOTE_ADDR'};
2434: }
2435: my %returnhash;
2436: $namespace=~s/\//\_/g;
2437: $namespace=~s/\W//g;
2438: my %hash;
2439: my $path=$perlvar{'lonDaemons'}.'/tmp';
2440: if (tie(%hash,'GDBM_File',
2441: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2442: &GDBM_READER(),0640)) {
2443: my $version=$hash{"version:$symb"};
2444: $returnhash{'version'}=$version;
2445: my $scope;
2446: for ($scope=1;$scope<=$version;$scope++) {
2447: my $vkeys=$hash{"$scope:keys:$symb"};
2448: my @keys=split(/:/,$vkeys);
2449: my $key;
2450: $returnhash{"$scope:keys"}=$vkeys;
2451: foreach $key (@keys) {
2452: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2453: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2454: }
2455: }
2456: if (!(untie(%hash))) {
2457: return "error:$!";
2458: }
2459: } else {
2460: return "error:$!";
2461: }
2462: return %returnhash;
2463: }
2464:
2465: # ----------------------------------------------------------------------- Store
2466:
2467: sub store {
2468: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2469: my $home='';
2470:
2471: if ($stuname) { $home=&homeserver($stuname,$domain); }
2472:
2473: $symb=&symbclean($symb);
2474: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2475:
2476: if (!$domain) { $domain=$env{'user.domain'}; }
2477: if (!$stuname) { $stuname=$env{'user.name'}; }
2478:
2479: &devalidate($symb,$stuname,$domain);
2480:
2481: $symb=escape($symb);
2482: if (!$namespace) {
2483: unless ($namespace=$env{'request.course.id'}) {
2484: return '';
2485: }
2486: }
2487: if (!$home) { $home=$env{'user.home'}; }
2488:
2489: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2490: $$storehash{'host'}=$perlvar{'lonHostID'};
2491:
2492: my $namevalue='';
2493: foreach (keys %$storehash) {
2494: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2495: }
2496: $namevalue=~s/\&$//;
2497: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2498: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2499: }
2500:
2501: # -------------------------------------------------------------- Critical Store
2502:
2503: sub cstore {
2504: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2505: my $home='';
2506:
2507: if ($stuname) { $home=&homeserver($stuname,$domain); }
2508:
2509: $symb=&symbclean($symb);
2510: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2511:
2512: if (!$domain) { $domain=$env{'user.domain'}; }
2513: if (!$stuname) { $stuname=$env{'user.name'}; }
2514:
2515: &devalidate($symb,$stuname,$domain);
2516:
2517: $symb=escape($symb);
2518: if (!$namespace) {
2519: unless ($namespace=$env{'request.course.id'}) {
2520: return '';
2521: }
2522: }
2523: if (!$home) { $home=$env{'user.home'}; }
2524:
2525: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2526: $$storehash{'host'}=$perlvar{'lonHostID'};
2527:
2528: my $namevalue='';
2529: foreach (keys %$storehash) {
2530: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2531: }
2532: $namevalue=~s/\&$//;
2533: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2534: return critical
2535: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2536: }
2537:
2538: # --------------------------------------------------------------------- Restore
2539:
2540: sub restore {
2541: my ($symb,$namespace,$domain,$stuname) = @_;
2542: my $home='';
2543:
2544: if ($stuname) { $home=&homeserver($stuname,$domain); }
2545:
2546: if (!$symb) {
2547: unless ($symb=escape(&symbread())) { return ''; }
2548: } else {
2549: $symb=&escape(&symbclean($symb));
2550: }
2551: if (!$namespace) {
2552: unless ($namespace=$env{'request.course.id'}) {
2553: return '';
2554: }
2555: }
2556: if (!$domain) { $domain=$env{'user.domain'}; }
2557: if (!$stuname) { $stuname=$env{'user.name'}; }
2558: if (!$home) { $home=$env{'user.home'}; }
2559: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2560:
2561: my %returnhash=();
2562: foreach (split(/\&/,$answer)) {
2563: my ($name,$value)=split(/\=/,$_);
2564: $returnhash{&unescape($name)}=&thaw_unescape($value);
2565: }
2566: my $version;
2567: for ($version=1;$version<=$returnhash{'version'};$version++) {
2568: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2569: $returnhash{$_}=$returnhash{$version.':'.$_};
2570: }
2571: }
2572: return %returnhash;
2573: }
2574:
2575: # ---------------------------------------------------------- Course Description
2576:
2577: sub coursedescription {
2578: my $courseid=shift;
2579: $courseid=~s/^\///;
2580: $courseid=~s/\_/\//g;
2581: my ($cdomain,$cnum)=split(/\//,$courseid);
2582: my $chome=&homeserver($cnum,$cdomain);
2583: my $normalid=$cdomain.'_'.$cnum;
2584: # need to always cache even if we get errors otherwise we keep
2585: # trying and trying and trying to get the course description.
2586: my %envhash=();
2587: my %returnhash=();
2588: $envhash{'course.'.$normalid.'.last_cache'}=time;
2589: if ($chome ne 'no_host') {
2590: %returnhash=&dump('environment',$cdomain,$cnum);
2591: if (!exists($returnhash{'con_lost'})) {
2592: $returnhash{'home'}= $chome;
2593: $returnhash{'domain'} = $cdomain;
2594: $returnhash{'num'} = $cnum;
2595: while (my ($name,$value) = each %returnhash) {
2596: $envhash{'course.'.$normalid.'.'.$name}=$value;
2597: }
2598: $returnhash{'url'}=&clutter($returnhash{'url'});
2599: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2600: $env{'user.name'}.'_'.$cdomain.'_'.$cnum;
2601: $envhash{'course.'.$normalid.'.home'}=$chome;
2602: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2603: $envhash{'course.'.$normalid.'.num'}=$cnum;
2604: }
2605: }
2606: &appenv(%envhash);
2607: return %returnhash;
2608: }
2609:
2610: # -------------------------------------------------See if a user is privileged
2611:
2612: sub privileged {
2613: my ($username,$domain)=@_;
2614: my $rolesdump=&reply("dump:$domain:$username:roles",
2615: &homeserver($username,$domain));
2616: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2617: my $now=time;
2618: if ($rolesdump ne '') {
2619: foreach (split(/&/,$rolesdump)) {
2620: if ($_!~/^rolesdef_/) {
2621: my ($area,$role)=split(/=/,$_);
2622: $area=~s/\_\w\w$//;
2623: my ($trole,$tend,$tstart)=split(/_/,$role);
2624: if (($trole eq 'dc') || ($trole eq 'su')) {
2625: my $active=1;
2626: if ($tend) {
2627: if ($tend<$now) { $active=0; }
2628: }
2629: if ($tstart) {
2630: if ($tstart>$now) { $active=0; }
2631: }
2632: if ($active) { return 1; }
2633: }
2634: }
2635: }
2636: }
2637: return 0;
2638: }
2639:
2640: # -------------------------------------------------------- Get user privileges
2641:
2642: sub rolesinit {
2643: my ($domain,$username,$authhost)=@_;
2644: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2645: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2646: my %allroles=();
2647: my %allgroups=();
2648: my $now=time;
2649: my $userroles="user.login.time=$now\n";
2650: my $group_privs;
2651:
2652: if ($rolesdump ne '') {
2653: foreach (split(/&/,$rolesdump)) {
2654: if ($_!~/^rolesdef_/) {
2655: my ($area,$role)=split(/=/,$_);
2656: $area=~s/\_\w\w$//;
2657: my ($trole,$tend,$tstart,$group_privs);
2658: if ($role=~/^cr/) {
2659: if ($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|) {
2660: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2661: ($tend,$tstart)=split('_',$trest);
2662: } else {
2663: $trole=$role;
2664: }
2665: } elsif ($role =~ m|^gr/|) {
2666: ($trole,$tend,$tstart) = split(/_/,$role);
2667: ($trole,$group_privs) = split(/\//,$trole);
2668: $group_privs = &unescape($group_privs);
2669: } else {
2670: ($trole,$tend,$tstart)=split(/_/,$role);
2671: }
2672: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2673: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2674: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2675: if (($area ne '') && ($trole ne '')) {
2676: my $spec=$trole.'.'.$area;
2677: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2678: if ($trole =~ /^cr\//) {
2679: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2680: } elsif ($trole eq 'gr') {
2681: &group_roleprivs(\%allgroups,$area,$group_privs,$tend,$tstart);
2682: } else {
2683: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2684: }
2685: }
2686: }
2687: }
2688: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles,\%allgroups);
2689: $userroles.='user.adv='.$adv."\n".
2690: 'user.author='.$author."\n";
2691: $env{'user.adv'}=$adv;
2692: }
2693: return $userroles;
2694: }
2695:
2696: sub set_arearole {
2697: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2698: # log the associated role with the area
2699: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2700: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2701: }
2702:
2703: sub custom_roleprivs {
2704: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2705: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2706: my $homsvr=homeserver($rauthor,$rdomain);
2707: if ($hostname{$homsvr} ne '') {
2708: my ($rdummy,$roledef)=
2709: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2710: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2711: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2712: if (defined($syspriv)) {
2713: $$allroles{'cm./'}.=':'.$syspriv;
2714: $$allroles{$spec.'./'}.=':'.$syspriv;
2715: }
2716: if ($tdomain ne '') {
2717: if (defined($dompriv)) {
2718: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2719: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2720: }
2721: if (($trest ne '') && (defined($coursepriv))) {
2722: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2723: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2724: }
2725: }
2726: }
2727: }
2728: }
2729:
2730: sub group_roleprivs {
2731: my ($allgroups,$area,$group_privs,$tend,$tstart) = @_;
2732: my $access = 1;
2733: my $now = time;
2734: if (($tend!=0) && ($tend<$now)) { $access = 0; }
2735: if (($tstart!=0) && ($tstart>$now)) { $access=0; }
2736: if ($access) {
2737: my ($course,$group) = ($area =~ m|(/\w+/\w+)/([^/]+)$|);
2738: $$allgroups{$course}{$group} .=':'.$group_privs;
2739: }
2740: }
2741:
2742: sub standard_roleprivs {
2743: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2744: if (defined($pr{$trole.':s'})) {
2745: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2746: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2747: }
2748: if ($tdomain ne '') {
2749: if (defined($pr{$trole.':d'})) {
2750: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2751: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2752: }
2753: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2754: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2755: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2756: }
2757: }
2758: }
2759:
2760: sub set_userprivs {
2761: my ($userroles,$allroles,$allgroups) = @_;
2762: my $author=0;
2763: my $adv=0;
2764: my %grouproles = ();
2765: if (keys(%{$allgroups}) > 0) {
2766: foreach my $role (keys %{$allroles}) {
2767: my ($trole,$area,$sec,$extendedarea);
2768: if ($role =~ m|^(\w+)\.(/\w+/\w+)(/?\w*)|) {
2769: $trole = $1;
2770: $area = $2;
2771: $sec = $3;
2772: $extendedarea = $area.$sec;
2773: if (exists($$allgroups{$area})) {
2774: foreach my $group (keys(%{$$allgroups{$area}})) {
2775: my $spec = $trole.'.'.$extendedarea;
2776: $grouproles{$spec.'.'.$area.'/'.$group} =
2777: $$allgroups{$area}{$group};
2778: }
2779: }
2780: }
2781: }
2782: }
2783: foreach (keys(%grouproles)) {
2784: $$allroles{$_} = $grouproles{$_};
2785: }
2786: foreach (keys %{$allroles}) {
2787: my %thesepriv=();
2788: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2789: foreach (split(/:/,$$allroles{$_})) {
2790: if ($_ ne '') {
2791: my ($privilege,$restrictions)=split(/&/,$_);
2792: if ($restrictions eq '') {
2793: $thesepriv{$privilege}='F';
2794: } elsif ($thesepriv{$privilege} ne 'F') {
2795: $thesepriv{$privilege}.=$restrictions;
2796: }
2797: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2798: }
2799: }
2800: my $thesestr='';
2801: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2802: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2803: }
2804: return ($author,$adv);
2805: }
2806:
2807: # --------------------------------------------------------------- get interface
2808:
2809: sub get {
2810: my ($namespace,$storearr,$udomain,$uname)=@_;
2811: my $items='';
2812: foreach (@$storearr) {
2813: $items.=escape($_).'&';
2814: }
2815: $items=~s/\&$//;
2816: if (!$udomain) { $udomain=$env{'user.domain'}; }
2817: if (!$uname) { $uname=$env{'user.name'}; }
2818: my $uhome=&homeserver($uname,$udomain);
2819:
2820: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2821: my @pairs=split(/\&/,$rep);
2822: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2823: return @pairs;
2824: }
2825: my %returnhash=();
2826: my $i=0;
2827: foreach (@$storearr) {
2828: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2829: $i++;
2830: }
2831: return %returnhash;
2832: }
2833:
2834: # --------------------------------------------------------------- del interface
2835:
2836: sub del {
2837: my ($namespace,$storearr,$udomain,$uname)=@_;
2838: my $items='';
2839: foreach (@$storearr) {
2840: $items.=escape($_).'&';
2841: }
2842: $items=~s/\&$//;
2843: if (!$udomain) { $udomain=$env{'user.domain'}; }
2844: if (!$uname) { $uname=$env{'user.name'}; }
2845: my $uhome=&homeserver($uname,$udomain);
2846:
2847: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2848: }
2849:
2850: # -------------------------------------------------------------- dump interface
2851:
2852: sub dump {
2853: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2854: if (!$udomain) { $udomain=$env{'user.domain'}; }
2855: if (!$uname) { $uname=$env{'user.name'}; }
2856: my $uhome=&homeserver($uname,$udomain);
2857: if ($regexp) {
2858: $regexp=&escape($regexp);
2859: } else {
2860: $regexp='.';
2861: }
2862: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp:$range",$uhome);
2863: my @pairs=split(/\&/,$rep);
2864: my %returnhash=();
2865: foreach (@pairs) {
2866: my ($key,$value)=split(/=/,$_,2);
2867: $returnhash{unescape($key)}=&thaw_unescape($value);
2868: }
2869: return %returnhash;
2870: }
2871:
2872: # --------------------------------------------------------- dumpstore interface
2873:
2874: sub dumpstore {
2875: my ($namespace,$udomain,$uname,$regexp,$range)=@_;
2876: return &dump($namespace,$udomain,$uname,$regexp,$range);
2877: }
2878:
2879: # -------------------------------------------------------------- keys interface
2880:
2881: sub getkeys {
2882: my ($namespace,$udomain,$uname)=@_;
2883: if (!$udomain) { $udomain=$env{'user.domain'}; }
2884: if (!$uname) { $uname=$env{'user.name'}; }
2885: my $uhome=&homeserver($uname,$udomain);
2886: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2887: my @keyarray=();
2888: foreach (split(/\&/,$rep)) {
2889: push (@keyarray,&unescape($_));
2890: }
2891: return @keyarray;
2892: }
2893:
2894: # --------------------------------------------------------------- currentdump
2895: sub currentdump {
2896: my ($courseid,$sdom,$sname)=@_;
2897: $courseid = $env{'request.course.id'} if (! defined($courseid));
2898: $sdom = $env{'user.domain'} if (! defined($sdom));
2899: $sname = $env{'user.name'} if (! defined($sname));
2900: my $uhome = &homeserver($sname,$sdom);
2901: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2902: return if ($rep =~ /^(error:|no_such_host)/);
2903: #
2904: my %returnhash=();
2905: #
2906: if ($rep eq "unknown_cmd") {
2907: # an old lond will not know currentdump
2908: # Do a dump and make it look like a currentdump
2909: my @tmp = &dump($courseid,$sdom,$sname,'.');
2910: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2911: my %hash = @tmp;
2912: @tmp=();
2913: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2914: } else {
2915: my @pairs=split(/\&/,$rep);
2916: foreach (@pairs) {
2917: my ($key,$value)=split(/=/,$_);
2918: my ($symb,$param) = split(/:/,$key);
2919: $returnhash{&unescape($symb)}->{&unescape($param)} =
2920: &thaw_unescape($value);
2921: }
2922: }
2923: return %returnhash;
2924: }
2925:
2926: sub convert_dump_to_currentdump{
2927: my %hash = %{shift()};
2928: my %returnhash;
2929: # Code ripped from lond, essentially. The only difference
2930: # here is the unescaping done by lonnet::dump(). Conceivably
2931: # we might run in to problems with parameter names =~ /^v\./
2932: while (my ($key,$value) = each(%hash)) {
2933: my ($v,$symb,$param) = split(/:/,$key);
2934: next if ($v eq 'version' || $symb eq 'keys');
2935: next if (exists($returnhash{$symb}) &&
2936: exists($returnhash{$symb}->{$param}) &&
2937: $returnhash{$symb}->{'v.'.$param} > $v);
2938: $returnhash{$symb}->{$param}=$value;
2939: $returnhash{$symb}->{'v.'.$param}=$v;
2940: }
2941: #
2942: # Remove all of the keys in the hashes which keep track of
2943: # the version of the parameter.
2944: while (my ($symb,$param_hash) = each(%returnhash)) {
2945: # use a foreach because we are going to delete from the hash.
2946: foreach my $key (keys(%$param_hash)) {
2947: delete($param_hash->{$key}) if ($key =~ /^v\./);
2948: }
2949: }
2950: return \%returnhash;
2951: }
2952:
2953: # ------------------------------------------------------ critical inc interface
2954:
2955: sub cinc {
2956: return &inc(@_,'critical');
2957: }
2958:
2959: # --------------------------------------------------------------- inc interface
2960:
2961: sub inc {
2962: my ($namespace,$store,$udomain,$uname,$critical) = @_;
2963: if (!$udomain) { $udomain=$env{'user.domain'}; }
2964: if (!$uname) { $uname=$env{'user.name'}; }
2965: my $uhome=&homeserver($uname,$udomain);
2966: my $items='';
2967: if (! ref($store)) {
2968: # got a single value, so use that instead
2969: $items = &escape($store).'=&';
2970: } elsif (ref($store) eq 'SCALAR') {
2971: $items = &escape($$store).'=&';
2972: } elsif (ref($store) eq 'ARRAY') {
2973: $items = join('=&',map {&escape($_);} @{$store});
2974: } elsif (ref($store) eq 'HASH') {
2975: while (my($key,$value) = each(%{$store})) {
2976: $items.= &escape($key).'='.&escape($value).'&';
2977: }
2978: }
2979: $items=~s/\&$//;
2980: if ($critical) {
2981: return &critical("inc:$udomain:$uname:$namespace:$items",$uhome);
2982: } else {
2983: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2984: }
2985: }
2986:
2987: # --------------------------------------------------------------- put interface
2988:
2989: sub put {
2990: my ($namespace,$storehash,$udomain,$uname)=@_;
2991: if (!$udomain) { $udomain=$env{'user.domain'}; }
2992: if (!$uname) { $uname=$env{'user.name'}; }
2993: my $uhome=&homeserver($uname,$udomain);
2994: my $items='';
2995: foreach (keys %$storehash) {
2996: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2997: }
2998: $items=~s/\&$//;
2999: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3000: }
3001:
3002: # ------------------------------------------------------------ newput interface
3003:
3004: sub newput {
3005: my ($namespace,$storehash,$udomain,$uname)=@_;
3006: if (!$udomain) { $udomain=$env{'user.domain'}; }
3007: if (!$uname) { $uname=$env{'user.name'}; }
3008: my $uhome=&homeserver($uname,$udomain);
3009: my $items='';
3010: foreach my $key (keys(%$storehash)) {
3011: $items.=&escape($key).'='.&freeze_escape($$storehash{$key}).'&';
3012: }
3013: $items=~s/\&$//;
3014: return &reply("newput:$udomain:$uname:$namespace:$items",$uhome);
3015: }
3016:
3017: # --------------------------------------------------------- putstore interface
3018:
3019: sub putstore {
3020: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3021: if (!$udomain) { $udomain=$env{'user.domain'}; }
3022: if (!$uname) { $uname=$env{'user.name'}; }
3023: my $uhome=&homeserver($uname,$udomain);
3024: my $items='';
3025: foreach my $key (keys(%$storehash)) {
3026: $items.= &escape($key).'='.&freeze_escape($storehash->{$key}).'&';
3027: }
3028: $items=~s/\&$//;
3029: my $esc_symb=&escape($symb);
3030: my $esc_v=&escape($version);
3031: my $reply =
3032: &reply("putstore:$udomain:$uname:$namespace:$esc_symb:$esc_v:$items",
3033: $uhome);
3034: if ($reply eq 'unknown_cmd') {
3035: # gfall back to way things use to be done
3036: return &old_putstore($namespace,$symb,$version,$storehash,$udomain,
3037: $uname);
3038: }
3039: return $reply;
3040: }
3041:
3042: sub old_putstore {
3043: my ($namespace,$symb,$version,$storehash,$udomain,$uname)=@_;
3044: if (!$udomain) { $udomain=$env{'user.domain'}; }
3045: if (!$uname) { $uname=$env{'user.name'}; }
3046: my $uhome=&homeserver($uname,$udomain);
3047: my %newstorehash;
3048: foreach (keys %$storehash) {
3049: my $key = $version.':'.&escape($symb).':'.$_;
3050: $newstorehash{$key} = $storehash->{$_};
3051: }
3052: my $items='';
3053: my %allitems = ();
3054: foreach (keys %newstorehash) {
3055: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
3056: my $key = $1.':keys:'.$2;
3057: $allitems{$key} .= $3.':';
3058: }
3059: $items.=$_.'='.&freeze_escape($newstorehash{$_}).'&';
3060: }
3061: foreach (keys %allitems) {
3062: $allitems{$_} =~ s/\:$//;
3063: $items.= $_.'='.$allitems{$_}.'&';
3064: }
3065: $items=~s/\&$//;
3066: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
3067: }
3068:
3069: # ------------------------------------------------------ critical put interface
3070:
3071: sub cput {
3072: my ($namespace,$storehash,$udomain,$uname)=@_;
3073: if (!$udomain) { $udomain=$env{'user.domain'}; }
3074: if (!$uname) { $uname=$env{'user.name'}; }
3075: my $uhome=&homeserver($uname,$udomain);
3076: my $items='';
3077: foreach (keys %$storehash) {
3078: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3079: }
3080: $items=~s/\&$//;
3081: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
3082: }
3083:
3084: # -------------------------------------------------------------- eget interface
3085:
3086: sub eget {
3087: my ($namespace,$storearr,$udomain,$uname)=@_;
3088: my $items='';
3089: foreach (@$storearr) {
3090: $items.=escape($_).'&';
3091: }
3092: $items=~s/\&$//;
3093: if (!$udomain) { $udomain=$env{'user.domain'}; }
3094: if (!$uname) { $uname=$env{'user.name'}; }
3095: my $uhome=&homeserver($uname,$udomain);
3096: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
3097: my @pairs=split(/\&/,$rep);
3098: my %returnhash=();
3099: my $i=0;
3100: foreach (@$storearr) {
3101: $returnhash{$_}=&thaw_unescape($pairs[$i]);
3102: $i++;
3103: }
3104: return %returnhash;
3105: }
3106:
3107: # ------------------------------------------------------------ tmpput interface
3108: sub tmpput {
3109: my ($storehash,$server)=@_;
3110: my $items='';
3111: foreach (keys(%$storehash)) {
3112: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
3113: }
3114: $items=~s/\&$//;
3115: return &reply("tmpput:$items",$server);
3116: }
3117:
3118: # ------------------------------------------------------------ tmpget interface
3119: sub tmpget {
3120: my ($token,$server)=@_;
3121: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3122: my $rep=&reply("tmpget:$token",$server);
3123: my %returnhash;
3124: foreach my $item (split(/\&/,$rep)) {
3125: my ($key,$value)=split(/=/,$item);
3126: $returnhash{&unescape($key)}=&thaw_unescape($value);
3127: }
3128: return %returnhash;
3129: }
3130:
3131: # ------------------------------------------------------------ tmpget interface
3132: sub tmpdel {
3133: my ($token,$server)=@_;
3134: if (!defined($server)) { $server = $perlvar{'lonHostID'}; }
3135: return &reply("tmpdel:$token",$server);
3136: }
3137:
3138: # ---------------------------------------------- Custom access rule evaluation
3139:
3140: sub customaccess {
3141: my ($priv,$uri)=@_;
3142: my ($urole,$urealm)=split(/\./,$env{'request.role'});
3143: $urealm=~s/^\W//;
3144: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
3145: my $access=0;
3146: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
3147: my ($effect,$realm,$role)=split(/\:/,$_);
3148: if ($role) {
3149: if ($role ne $urole) { next; }
3150: }
3151: foreach (split(/\s*\,\s*/,$realm)) {
3152: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
3153: if ($tdom) {
3154: if ($tdom ne $udom) { next; }
3155: }
3156: if ($tcrs) {
3157: if ($tcrs ne $ucrs) { next; }
3158: }
3159: if ($tsec) {
3160: if ($tsec ne $usec) { next; }
3161: }
3162: $access=($effect eq 'allow');
3163: last;
3164: }
3165: if ($realm eq '' && $role eq '') {
3166: $access=($effect eq 'allow');
3167: }
3168: }
3169: return $access;
3170: }
3171:
3172: # ------------------------------------------------- Check for a user privilege
3173:
3174: sub allowed {
3175: my ($priv,$uri,$symb)=@_;
3176: my $ver_orguri=$uri;
3177: $uri=&deversion($uri);
3178: my $orguri=$uri;
3179: $uri=&declutter($uri);
3180:
3181: if (defined($env{'allowed.'.$priv})) { return $env{'allowed.'.$priv}; }
3182: # Free bre access to adm and meta resources
3183: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
3184: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
3185: return 'F';
3186: }
3187:
3188: # Free bre access to user's own portfolio contents
3189: my ($space,$domain,$name,@dir)=split('/',$uri);
3190: if (($space=~/^(uploaded|editupload)$/) && ($env{'user.name'} eq $name) &&
3191: ($env{'user.domain'} eq $domain) && ('portfolio' eq $dir[0])) {
3192: return 'F';
3193: }
3194:
3195: # bre access to group if user has rgf priv for this group and course.
3196: if (($space=~/^(uploaded|editupload)$/) && ($dir[0] eq 'groups')
3197: && ($dir[2] eq 'portfolio') && ($priv eq 'bre')) {
3198: if (exists($env{'request.course.id'})) {
3199: my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
3200: my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
3201: if (($domain eq $cdom) && ($name eq $cnum)) {
3202: my $courseprivid=$env{'request.course.id'};
3203: $courseprivid=~s/\_/\//;
3204: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid
3205: .'/'.$dir[1]} =~/rgf\&([^\:]*)/) {
3206: return $1;
3207: }
3208: }
3209: }
3210: }
3211:
3212: # Free bre to public access
3213:
3214: if ($priv eq 'bre') {
3215: my $copyright=&metadata($uri,'copyright');
3216: if (($copyright eq 'public') && (!$env{'request.course.id'})) {
3217: return 'F';
3218: }
3219: if ($copyright eq 'priv') {
3220: $uri=~/([^\/]+)\/([^\/]+)\//;
3221: unless (($env{'user.name'} eq $2) && ($env{'user.domain'} eq $1)) {
3222: return '';
3223: }
3224: }
3225: if ($copyright eq 'domain') {
3226: $uri=~/([^\/]+)\/([^\/]+)\//;
3227: unless (($env{'user.domain'} eq $1) ||
3228: ($env{'course.'.$env{'request.course.id'}.'.domain'} eq $1)) {
3229: return '';
3230: }
3231: }
3232: if ($env{'request.role'}=~ /li\.\//) {
3233: # Library role, so allow browsing of resources in this domain.
3234: return 'F';
3235: }
3236: if ($copyright eq 'custom') {
3237: unless (&customaccess($priv,$uri)) { return ''; }
3238: }
3239: }
3240: # Domain coordinator is trying to create a course
3241: if (($priv eq 'ccc') && ($env{'request.role'} =~ /^dc\./)) {
3242: # uri is the requested domain in this case.
3243: # comparison to 'request.role.domain' shows if the user has selected
3244: # a role of dc for the domain in question.
3245: return 'F' if ($uri eq $env{'request.role.domain'});
3246: }
3247:
3248: my $thisallowed='';
3249: my $statecond=0;
3250: my $courseprivid='';
3251:
3252: # Course
3253:
3254: if ($env{'user.priv.'.$env{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
3255: $thisallowed.=$1;
3256: }
3257:
3258: # Domain
3259:
3260: if ($env{'user.priv.'.$env{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
3261: =~/\Q$priv\E\&([^\:]*)/) {
3262: $thisallowed.=$1;
3263: }
3264:
3265: # Course: uri itself is a course
3266: my $courseuri=$uri;
3267: $courseuri=~s/\_(\d)/\/$1/;
3268: $courseuri=~s/^([^\/])/\/$1/;
3269:
3270: if ($env{'user.priv.'.$env{'request.role'}.'.'.$courseuri}
3271: =~/\Q$priv\E\&([^\:]*)/) {
3272: $thisallowed.=$1;
3273: }
3274:
3275: # Group: uri itself is a group
3276: my $groupuri=$uri;
3277: $groupuri=~s/^([^\/])/\/$1/;
3278: if ($env{'user.priv.'.$env{'request.role'}.'.'.$groupuri}
3279: =~/\Q$priv\E\&([^\:]*)/) {
3280: $thisallowed.=$1;
3281: }
3282:
3283: # URI is an uploaded document for this course, default permissions don't matter
3284: # not allowing 'edit' access (editupload) to uploaded course docs
3285: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
3286: $thisallowed='';
3287: my ($match)=&is_on_map($uri);
3288: if ($match) {
3289: if ($env{'user.priv.'.$env{'request.role'}.'./'}
3290: =~/\Q$priv\E\&([^\:]*)/) {
3291: $thisallowed.=$1;
3292: }
3293: } else {
3294: my $refuri = $env{'httpref.'.$orguri} || $env{'httpref.'.$ver_orguri};
3295: if ($refuri) {
3296: if ($refuri =~ m|^/adm/|) {
3297: $thisallowed='F';
3298: } else {
3299: $refuri=&declutter($refuri);
3300: my ($match) = &is_on_map($refuri);
3301: if ($match) {
3302: $thisallowed='F';
3303: }
3304: }
3305: }
3306: }
3307: }
3308:
3309: # Full access at system, domain or course-wide level? Exit.
3310:
3311: if ($thisallowed=~/F/) {
3312: return 'F';
3313: }
3314:
3315: # If this is generating or modifying users, exit with special codes
3316:
3317: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:caa:'=~/\:\Q$priv\E\:/) {
3318: if (($priv eq 'cca') || ($priv eq 'caa')) {
3319: my ($audom,$auname)=split('/',$uri);
3320: # no author name given, so this just checks on the general right to make a co-author in this domain
3321: unless ($auname) { return $thisallowed; }
3322: # an author name is given, so we are about to actually make a co-author for a certain account
3323: if (($auname ne $env{'user.name'} && $env{'request.role'} !~ /^dc\./) ||
3324: (($audom ne $env{'user.domain'} && $env{'request.role'} !~ /^dc\./) &&
3325: ($audom ne $env{'request.role.domain'}))) { return ''; }
3326: }
3327: return $thisallowed;
3328: }
3329: #
3330: # Gathered so far: system, domain and course wide privileges
3331: #
3332: # Course: See if uri or referer is an individual resource that is part of
3333: # the course
3334:
3335: if ($env{'request.course.id'}) {
3336:
3337: $courseprivid=$env{'request.course.id'};
3338: if ($env{'request.course.sec'}) {
3339: $courseprivid.='/'.$env{'request.course.sec'};
3340: }
3341: $courseprivid=~s/\_/\//;
3342: my $checkreferer=1;
3343: my ($match,$cond)=&is_on_map($uri);
3344: if ($match) {
3345: $statecond=$cond;
3346: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3347: =~/\Q$priv\E\&([^\:]*)/) {
3348: $thisallowed.=$1;
3349: $checkreferer=0;
3350: }
3351: }
3352:
3353: if ($checkreferer) {
3354: my $refuri=$env{'httpref.'.$orguri};
3355: unless ($refuri) {
3356: foreach (keys %env) {
3357: if ($_=~/^httpref\..*\*/) {
3358: my $pattern=$_;
3359: $pattern=~s/^httpref\.\/res\///;
3360: $pattern=~s/\*/\[\^\/\]\+/g;
3361: $pattern=~s/\//\\\//g;
3362: if ($orguri=~/$pattern/) {
3363: $refuri=$env{$_};
3364: }
3365: }
3366: }
3367: }
3368:
3369: if ($refuri) {
3370: $refuri=&declutter($refuri);
3371: my ($match,$cond)=&is_on_map($refuri);
3372: if ($match) {
3373: my $refstatecond=$cond;
3374: if ($env{'user.priv.'.$env{'request.role'}.'./'.$courseprivid}
3375: =~/\Q$priv\E\&([^\:]*)/) {
3376: $thisallowed.=$1;
3377: $uri=$refuri;
3378: $statecond=$refstatecond;
3379: }
3380: }
3381: }
3382: }
3383: }
3384:
3385: #
3386: # Gathered now: all privileges that could apply, and condition number
3387: #
3388: #
3389: # Full or no access?
3390: #
3391:
3392: if ($thisallowed=~/F/) {
3393: return 'F';
3394: }
3395:
3396: unless ($thisallowed) {
3397: return '';
3398: }
3399:
3400: # Restrictions exist, deal with them
3401: #
3402: # C:according to course preferences
3403: # R:according to resource settings
3404: # L:unless locked
3405: # X:according to user session state
3406: #
3407:
3408: # Possibly locked functionality, check all courses
3409: # Locks might take effect only after 10 minutes cache expiration for other
3410: # courses, and 2 minutes for current course
3411:
3412: my $envkey;
3413: if ($thisallowed=~/L/) {
3414: foreach $envkey (keys %env) {
3415: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3416: my $courseid=$2;
3417: my $roleid=$1.'.'.$2;
3418: $courseid=~s/^\///;
3419: my $expiretime=600;
3420: if ($env{'request.role'} eq $roleid) {
3421: $expiretime=120;
3422: }
3423: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3424: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3425: if ((time-$env{$prefix.'last_cache'})>$expiretime) {
3426: &coursedescription($courseid);
3427: }
3428: if (($env{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3429: || ($env{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3430: if ($env{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3431: &log($env{'user.domain'},$env{'user.name'},
3432: $env{'user.home'},
3433: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3434: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3435: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3436: return '';
3437: }
3438: }
3439: if (($env{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3440: || ($env{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3441: if ($env{'priv.'.$priv.'.lock.expire'}>time) {
3442: &log($env{'user.domain'},$env{'user.name'},
3443: $env{'user.home'},
3444: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3445: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3446: $env{$prefix.'priv.'.$priv.'.lock.expire'});
3447: return '';
3448: }
3449: }
3450: }
3451: }
3452: }
3453:
3454: #
3455: # Rest of the restrictions depend on selected course
3456: #
3457:
3458: unless ($env{'request.course.id'}) {
3459: return '1';
3460: }
3461:
3462: #
3463: # Now user is definitely in a course
3464: #
3465:
3466:
3467: # Course preferences
3468:
3469: if ($thisallowed=~/C/) {
3470: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3471: my $unamedom=$env{'user.name'}.':'.$env{'user.domain'};
3472: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.roles.denied'}
3473: =~/\Q$rolecode\E/) {
3474: if ($priv ne 'pch') {
3475: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3476: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3477: $env{'request.course.id'});
3478: }
3479: return '';
3480: }
3481:
3482: if ($env{'course.'.$env{'request.course.id'}.'.'.$priv.'.users.denied'}
3483: =~/\Q$unamedom\E/) {
3484: if ($priv ne 'pch') {
3485: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.
3486: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3487: $env{'request.course.id'});
3488: }
3489: return '';
3490: }
3491: }
3492:
3493: # Resource preferences
3494:
3495: if ($thisallowed=~/R/) {
3496: my $rolecode=(split(/\./,$env{'request.role'}))[0];
3497: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3498: if ($priv ne 'pch') {
3499: &logthis($env{'user.domain'}.':'.$env{'user.name'}.':'.$env{'user.home'}.':'.
3500: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3501: }
3502: return '';
3503: }
3504: }
3505:
3506: # Restricted by state or randomout?
3507:
3508: if ($thisallowed=~/X/) {
3509: if ($env{'acc.randomout'}) {
3510: if (!$symb) { $symb=&symbread($uri,1); }
3511: if (($symb) && ($env{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3512: return '';
3513: }
3514: }
3515: if (&condval($statecond)) {
3516: return '2';
3517: } else {
3518: return '';
3519: }
3520: }
3521:
3522: return 'F';
3523: }
3524:
3525: sub split_uri_for_cond {
3526: my $uri=&deversion(&declutter(shift));
3527: my @uriparts=split(/\//,$uri);
3528: my $filename=pop(@uriparts);
3529: my $pathname=join('/',@uriparts);
3530: return ($pathname,$filename);
3531: }
3532: # --------------------------------------------------- Is a resource on the map?
3533:
3534: sub is_on_map {
3535: my ($pathname,$filename) = &split_uri_for_cond(shift);
3536: #Trying to find the conditional for the file
3537: my $match=($env{'acc.res.'.$env{'request.course.id'}.'.'.$pathname}=~
3538: /\&\Q$filename\E\:([\d\|]+)\&/);
3539: if ($match) {
3540: return (1,$1);
3541: } else {
3542: return (0,0);
3543: }
3544: }
3545:
3546: # --------------------------------------------------------- Get symb from alias
3547:
3548: sub get_symb_from_alias {
3549: my $symb=shift;
3550: my ($map,$resid,$url)=&decode_symb($symb);
3551: # Already is a symb
3552: if ($url) { return $symb; }
3553: # Must be an alias
3554: my $aliassymb='';
3555: my %bighash;
3556: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
3557: &GDBM_READER(),0640)) {
3558: my $rid=$bighash{'mapalias_'.$symb};
3559: if ($rid) {
3560: my ($mapid,$resid)=split(/\./,$rid);
3561: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3562: $resid,$bighash{'src_'.$rid});
3563: }
3564: untie %bighash;
3565: }
3566: return $aliassymb;
3567: }
3568:
3569: # ----------------------------------------------------------------- Define Role
3570:
3571: sub definerole {
3572: if (allowed('mcr','/')) {
3573: my ($rolename,$sysrole,$domrole,$courole)=@_;
3574: foreach (split(':',$sysrole)) {
3575: my ($crole,$cqual)=split(/\&/,$_);
3576: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3577: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3578: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3579: return "refused:s:$crole&$cqual";
3580: }
3581: }
3582: }
3583: foreach (split(':',$domrole)) {
3584: my ($crole,$cqual)=split(/\&/,$_);
3585: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3586: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3587: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3588: return "refused:d:$crole&$cqual";
3589: }
3590: }
3591: }
3592: foreach (split(':',$courole)) {
3593: my ($crole,$cqual)=split(/\&/,$_);
3594: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3595: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3596: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3597: return "refused:c:$crole&$cqual";
3598: }
3599: }
3600: }
3601: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
3602: "$env{'user.domain'}:$env{'user.name'}:".
3603: "rolesdef_$rolename=".
3604: escape($sysrole.'_'.$domrole.'_'.$courole);
3605: return reply($command,$env{'user.home'});
3606: } else {
3607: return 'refused';
3608: }
3609: }
3610:
3611: # ---------------- Make a metadata query against the network of library servers
3612:
3613: sub metadata_query {
3614: my ($query,$custom,$customshow,$server_array)=@_;
3615: my %rhash;
3616: my @server_list = (defined($server_array) ? @$server_array
3617: : keys(%libserv) );
3618: for my $server (@server_list) {
3619: unless ($custom or $customshow) {
3620: my $reply=&reply("querysend:".&escape($query),$server);
3621: $rhash{$server}=$reply;
3622: }
3623: else {
3624: my $reply=&reply("querysend:".&escape($query).':'.
3625: &escape($custom).':'.&escape($customshow),
3626: $server);
3627: $rhash{$server}=$reply;
3628: }
3629: }
3630: return \%rhash;
3631: }
3632:
3633: # ----------------------------------------- Send log queries and wait for reply
3634:
3635: sub log_query {
3636: my ($uname,$udom,$query,%filters)=@_;
3637: my $uhome=&homeserver($uname,$udom);
3638: if ($uhome eq 'no_host') { return 'error: no_host'; }
3639: my $uhost=$hostname{$uhome};
3640: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3641: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3642: $uhome);
3643: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3644: return get_query_reply($queryid);
3645: }
3646:
3647: # ------- Request retrieval of institutional classlists for course(s)
3648:
3649: sub fetch_enrollment_query {
3650: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3651: my $homeserver;
3652: my $maxtries = 1;
3653: if ($context eq 'automated') {
3654: $homeserver = $perlvar{'lonHostID'};
3655: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3656: } else {
3657: $homeserver = &homeserver($cnum,$dom);
3658: }
3659: my $host=$hostname{$homeserver};
3660: my $cmd = '';
3661: foreach (keys %{$affiliatesref}) {
3662: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3663: }
3664: $cmd =~ s/%%$//;
3665: $cmd = &escape($cmd);
3666: my $query = 'fetchenrollment';
3667: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$env{'user.name'}.':'.$cmd,$homeserver);
3668: unless ($queryid=~/^\Q$host\E\_/) {
3669: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3670: return 'error: '.$queryid;
3671: }
3672: my $reply = &get_query_reply($queryid);
3673: my $tries = 1;
3674: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3675: $reply = &get_query_reply($queryid);
3676: $tries ++;
3677: }
3678: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3679: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3680: } else {
3681: my @responses = split/:/,$reply;
3682: if ($homeserver eq $perlvar{'lonHostID'}) {
3683: foreach (@responses) {
3684: my ($key,$value) = split/=/,$_;
3685: $$replyref{$key} = $value;
3686: }
3687: } else {
3688: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3689: foreach (@responses) {
3690: my ($key,$value) = split/=/,$_;
3691: $$replyref{$key} = $value;
3692: if ($value > 0) {
3693: foreach (@{$$affiliatesref{$key}}) {
3694: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3695: my $destname = $pathname.'/'.$filename;
3696: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3697: if ($xml_classlist =~ /^error/) {
3698: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3699: } else {
3700: if ( open(FILE,">$destname") ) {
3701: print FILE &unescape($xml_classlist);
3702: close(FILE);
3703: } else {
3704: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3705: }
3706: }
3707: }
3708: }
3709: }
3710: }
3711: return 'ok';
3712: }
3713: return 'error';
3714: }
3715:
3716: sub get_query_reply {
3717: my $queryid=shift;
3718: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3719: my $reply='';
3720: for (1..100) {
3721: sleep 2;
3722: if (-e $replyfile.'.end') {
3723: if (open(my $fh,$replyfile)) {
3724: $reply.=<$fh>;
3725: close($fh);
3726: } else { return 'error: reply_file_error'; }
3727: return &unescape($reply);
3728: }
3729: }
3730: return 'timeout:'.$queryid;
3731: }
3732:
3733: sub courselog_query {
3734: #
3735: # possible filters:
3736: # url: url or symb
3737: # username
3738: # domain
3739: # action: view, submit, grade
3740: # start: timestamp
3741: # end: timestamp
3742: #
3743: my (%filters)=@_;
3744: unless ($env{'request.course.id'}) { return 'no_course'; }
3745: if ($filters{'url'}) {
3746: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3747: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3748: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3749: }
3750: my $cname=$env{'course.'.$env{'request.course.id'}.'.num'};
3751: my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
3752: return &log_query($cname,$cdom,'courselog',%filters);
3753: }
3754:
3755: sub userlog_query {
3756: my ($uname,$udom,%filters)=@_;
3757: return &log_query($uname,$udom,'userlog',%filters);
3758: }
3759:
3760: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3761:
3762: sub auto_run {
3763: my ($cnum,$cdom) = @_;
3764: my $homeserver = &homeserver($cnum,$cdom);
3765: my $response = &reply('autorun:'.$cdom,$homeserver);
3766: return $response;
3767: }
3768:
3769: sub auto_get_sections {
3770: my ($cnum,$cdom,$inst_coursecode) = @_;
3771: my $homeserver = &homeserver($cnum,$cdom);
3772: my @secs = ();
3773: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3774: unless ($response eq 'refused') {
3775: @secs = split/:/,$response;
3776: }
3777: return @secs;
3778: }
3779:
3780: sub auto_new_course {
3781: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3782: my $homeserver = &homeserver($cnum,$cdom);
3783: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3784: return $response;
3785: }
3786:
3787: sub auto_validate_courseID {
3788: my ($cnum,$cdom,$inst_course_id) = @_;
3789: my $homeserver = &homeserver($cnum,$cdom);
3790: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3791: return $response;
3792: }
3793:
3794: sub auto_create_password {
3795: my ($cnum,$cdom,$authparam) = @_;
3796: my $homeserver = &homeserver($cnum,$cdom);
3797: my $create_passwd = 0;
3798: my $authchk = '';
3799: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3800: if ($response eq 'refused') {
3801: $authchk = 'refused';
3802: } else {
3803: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3804: }
3805: return ($authparam,$create_passwd,$authchk);
3806: }
3807:
3808: sub auto_photo_permission {
3809: my ($cnum,$cdom,$students) = @_;
3810: my $homeserver = &homeserver($cnum,$cdom);
3811: my ($outcome,$perm_reqd,$conditions) =
3812: split(/:/,&unescape(&reply('autophotopermission:'.$cdom,$homeserver)),3);
3813: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3814: return (undef,undef);
3815: }
3816: return ($outcome,$perm_reqd,$conditions);
3817: }
3818:
3819: sub auto_checkphotos {
3820: my ($uname,$udom,$pid) = @_;
3821: my $homeserver = &homeserver($uname,$udom);
3822: my ($result,$resulttype);
3823: my $outcome = &unescape(&reply('autophotocheck:'.&escape($udom).':'.
3824: &escape($uname).':'.&escape($pid),
3825: $homeserver));
3826: if ($outcome =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3827: return (undef,undef);
3828: }
3829: if ($outcome) {
3830: ($result,$resulttype) = split(/:/,$outcome);
3831: }
3832: return ($result,$resulttype);
3833: }
3834:
3835: sub auto_photochoice {
3836: my ($cnum,$cdom) = @_;
3837: my $homeserver = &homeserver($cnum,$cdom);
3838: my ($update,$comment) = split(/:/,&unescape(&reply('autophotochoice:'.
3839: &escape($cdom),
3840: $homeserver)));
3841: if ($update =~ /^(con_lost|unknown_cmd|no_such_host)$/) {
3842: return (undef,undef);
3843: }
3844: return ($update,$comment);
3845: }
3846:
3847: sub auto_photoupdate {
3848: my ($affiliatesref,$dom,$cnum,$photo) = @_;
3849: my $homeserver = &homeserver($cnum,$dom);
3850: my $host=$hostname{$homeserver};
3851: my $cmd = '';
3852: my $maxtries = 1;
3853: foreach (keys %{$affiliatesref}) {
3854: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3855: }
3856: $cmd =~ s/%%$//;
3857: $cmd = &escape($cmd);
3858: my $query = 'institutionalphotos';
3859: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$cnum.':'.$cmd,$homeserver);
3860: unless ($queryid=~/^\Q$host\E\_/) {
3861: &logthis('institutionalphotos: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' and course: '.$cnum);
3862: return 'error: '.$queryid;
3863: }
3864: my $reply = &get_query_reply($queryid);
3865: my $tries = 1;
3866: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3867: $reply = &get_query_reply($queryid);
3868: $tries ++;
3869: }
3870: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3871: &logthis('institutionalphotos error: '.$reply.' for '.$dom.' '.$env{'user.name'}.' for '.$queryid.' course: '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3872: } else {
3873: my @responses = split(/:/,$reply);
3874: my $outcome = shift(@responses);
3875: foreach my $item (@responses) {
3876: my ($key,$value) = split(/=/,$item);
3877: $$photo{$key} = $value;
3878: }
3879: return $outcome;
3880: }
3881: return 'error';
3882: }
3883:
3884: sub auto_instcode_format {
3885: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3886: my $courses = '';
3887: my $homeserver;
3888: if ($caller eq 'global') {
3889: foreach my $tryserver (keys %libserv) {
3890: if ($hostdom{$tryserver} eq $codedom) {
3891: $homeserver = $tryserver;
3892: last;
3893: }
3894: }
3895: if (($env{'user.name'}) && ($env{'user.domain'} eq $codedom)) {
3896: $homeserver = &homeserver($env{'user.name'},$codedom);
3897: }
3898: } else {
3899: $homeserver = &homeserver($caller,$codedom);
3900: }
3901: foreach (keys %{$instcodes}) {
3902: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3903: }
3904: chop($courses);
3905: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3906: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3907: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3908: %{$codes} = &str2hash($codes_str);
3909: @{$codetitles} = &str2array($codetitles_str);
3910: %{$cat_titles} = &str2hash($cat_titles_str);
3911: %{$cat_order} = &str2hash($cat_order_str);
3912: return 'ok';
3913: }
3914: return $response;
3915: }
3916:
3917: # ------------------------------------------------------- Course Group routines
3918:
3919: sub get_coursegroups {
3920: my ($cdom,$cnum,$group) = @_;
3921: return(&dump('coursegroups',$cdom,$cnum,$group));
3922: }
3923:
3924: sub modify_coursegroup {
3925: my ($cdom,$cnum,$groupsettings) = @_;
3926: return(&put('coursegroups',$groupsettings,$cdom,$cnum));
3927: }
3928:
3929: sub modify_group_roles {
3930: my ($cdom,$cnum,$group_id,$user,$end,$start,$userprivs) = @_;
3931: my $url = '/'.$cdom.'/'.$cnum.'/'.$group_id;
3932: my $role = 'gr/'.&escape($userprivs);
3933: my ($uname,$udom) = split(/:/,$user);
3934: my $result = &assignrole($udom,$uname,$url,$role,$end,$start);
3935: if ($result eq 'ok') {
3936: &devalidate_getgroups_cache($udom,$uname,$cdom,$cnum);
3937: }
3938:
3939: return $result;
3940: }
3941:
3942: sub modify_coursegroup_membership {
3943: my ($cdom,$cnum,$membership) = @_;
3944: my $result = &put('groupmembership',$membership,$cdom,$cnum);
3945: return $result;
3946: }
3947:
3948: sub get_active_groups {
3949: my ($udom,$uname,$cdom,$cnum) = @_;
3950: my $now = time;
3951: my %groups = ();
3952: foreach my $key (keys(%env)) {
3953: if ($key =~ m-user\.role\.gr\./([^/]+)/([^/]+)/(\w+)$-) {
3954: my ($start,$end) = split(/\./,$env{$key});
3955: if (($end!=0) && ($end<$now)) { next; }
3956: if (($start!=0) && ($start>$now)) { next; }
3957: if ($1 eq $cdom && $2 eq $cnum) {
3958: $groups{$3} = $env{$key} ;
3959: }
3960: }
3961: }
3962: return %groups;
3963: }
3964:
3965: sub get_group_membership {
3966: my ($cdom,$cnum,$group) = @_;
3967: return(&dump('groupmembership',$cdom,$cnum,$group));
3968: }
3969:
3970: sub get_users_groups {
3971: my ($udom,$uname,$courseid) = @_;
3972: my $cachetime=1800;
3973: $courseid=~s/\_/\//g;
3974: $courseid=~s/^(\w)/\/$1/;
3975:
3976: my $hashid="$udom:$uname:$courseid";
3977: my ($result,$cached)=&is_cached_new('getgroups',$hashid);
3978: if (defined($cached)) { return $result; }
3979:
3980: my %roleshash = &dump('roles',$udom,$uname,$courseid);
3981: my ($tmp) = keys(%roleshash);
3982: if ($tmp=~/^error:/) {
3983: &logthis('Error retrieving roles: '.$tmp.' for '.$uname.':'.$udom);
3984: return '';
3985: } else {
3986: my $grouplist;
3987: foreach my $key (keys %roleshash) {
3988: if ($key =~ /^\Q$courseid\E\/(\w+)\_gr$/) {
3989: unless ($roleshash{$key} =~ /_1_1$/) { # deleted membership
3990: $grouplist .= $1.':';
3991: }
3992: }
3993: }
3994: $grouplist =~ s/:$//;
3995: return &do_cache_new('getgroups',$hashid,$grouplist,$cachetime);
3996: }
3997: }
3998:
3999: sub devalidate_getgroups_cache {
4000: my ($udom,$uname,$cdom,$cnum)=@_;
4001: my $courseid = $cdom.'_'.$cnum;
4002: $courseid=~s/\_/\//g;
4003: $courseid=~s/^(\w)/\/$1/;
4004: my $hashid="$udom:$uname:$courseid";
4005: &devalidate_cache_new('getgroups',$hashid);
4006: }
4007:
4008: # ------------------------------------------------------------------ Plain Text
4009:
4010: sub plaintext {
4011: my $short=shift;
4012: return &Apache::lonlocal::mt($prp{$short});
4013: }
4014:
4015: # ----------------------------------------------------------------- Assign Role
4016:
4017: sub assignrole {
4018: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
4019: my $mrole;
4020: if ($role =~ /^cr\//) {
4021: my $cwosec=$url;
4022: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4023: unless (&allowed('ccr',$cwosec)) {
4024: &logthis('Refused custom assignrole: '.
4025: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4026: $env{'user.name'}.' at '.$env{'user.domain'});
4027: return 'refused';
4028: }
4029: $mrole='cr';
4030: } elsif ($role =~ /^gr\//) {
4031: my $cwogrp=$url;
4032: $cwogrp=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4033: unless (&allowed('mdg',$cwogrp)) {
4034: &logthis('Refused group assignrole: '.
4035: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4036: $env{'user.name'}.' at '.$env{'user.domain'});
4037: return 'refused';
4038: }
4039: $mrole='gr';
4040: } else {
4041: my $cwosec=$url;
4042: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
4043: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
4044: &logthis('Refused assignrole: '.
4045: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
4046: $env{'user.name'}.' at '.$env{'user.domain'});
4047: return 'refused';
4048: }
4049: $mrole=$role;
4050: }
4051: my $command="encrypt:rolesput:$env{'user.domain'}:$env{'user.name'}:".
4052: "$udom:$uname:$url".'_'."$mrole=$role";
4053: if ($end) { $command.='_'.$end; }
4054: if ($start) {
4055: if ($end) {
4056: $command.='_'.$start;
4057: } else {
4058: $command.='_0_'.$start;
4059: }
4060: }
4061: # actually delete
4062: if ($deleteflag) {
4063: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
4064: # modify command to delete the role
4065: $command="encrypt:rolesdel:$env{'user.domain'}:$env{'user.name'}:".
4066: "$udom:$uname:$url".'_'."$mrole";
4067: &logthis("$env{'user.name'} at $env{'user.domain'} deletes $mrole in $url for $uname at $udom");
4068: # set start and finish to negative values for userrolelog
4069: $start=-1;
4070: $end=-1;
4071: }
4072: }
4073: # send command
4074: my $answer=&reply($command,&homeserver($uname,$udom));
4075: # log new user role if status is ok
4076: if ($answer eq 'ok') {
4077: &userrolelog($role,$uname,$udom,$url,$start,$end);
4078: }
4079: return $answer;
4080: }
4081:
4082: # -------------------------------------------------- Modify user authentication
4083: # Overrides without validation
4084:
4085: sub modifyuserauth {
4086: my ($udom,$uname,$umode,$upass)=@_;
4087: my $uhome=&homeserver($uname,$udom);
4088: unless (&allowed('mau',$udom)) { return 'refused'; }
4089: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
4090: $umode.' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4091: ' in domain '.$env{'request.role.domain'});
4092: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
4093: &escape($upass),$uhome);
4094: &log($env{'user.domain'},$env{'user.name'},$env{'user.home'},
4095: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
4096: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4097: &log($udom,,$uname,$uhome,
4098: 'Authentication changed by '.$env{'user.domain'}.', '.
4099: $env{'user.name'}.', '.$umode.
4100: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
4101: unless ($reply eq 'ok') {
4102: &logthis('Authentication mode error: '.$reply);
4103: return 'error: '.$reply;
4104: }
4105: return 'ok';
4106: }
4107:
4108: # --------------------------------------------------------------- Modify a user
4109:
4110: sub modifyuser {
4111: my ($udom, $uname, $uid,
4112: $umode, $upass, $first,
4113: $middle, $last, $gene,
4114: $forceid, $desiredhome, $email)=@_;
4115: $udom=~s/\W//g;
4116: $uname=~s/\W//g;
4117: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
4118: $umode.', '.$first.', '.$middle.', '.
4119: $last.', '.$gene.'(forceid: '.$forceid.')'.
4120: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
4121: ' desiredhome not specified').
4122: ' by '.$env{'user.name'}.' at '.$env{'user.domain'}.
4123: ' in domain '.$env{'request.role.domain'});
4124: my $uhome=&homeserver($uname,$udom,'true');
4125: # ----------------------------------------------------------------- Create User
4126: if (($uhome eq 'no_host') &&
4127: (($umode && $upass) || ($umode eq 'localauth'))) {
4128: my $unhome='';
4129: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
4130: $unhome = $desiredhome;
4131: } elsif($env{'course.'.$env{'request.course.id'}.'.domain'} eq $udom) {
4132: $unhome=$env{'course.'.$env{'request.course.id'}.'.home'};
4133: } else { # load balancing routine for determining $unhome
4134: my $tryserver;
4135: my $loadm=10000000;
4136: foreach $tryserver (keys %libserv) {
4137: if ($hostdom{$tryserver} eq $udom) {
4138: my $answer=reply('load',$tryserver);
4139: if (($answer=~/\d+/) && ($answer<$loadm)) {
4140: $loadm=$answer;
4141: $unhome=$tryserver;
4142: }
4143: }
4144: }
4145: }
4146: if (($unhome eq '') || ($unhome eq 'no_host')) {
4147: return 'error: unable to find a home server for '.$uname.
4148: ' in domain '.$udom;
4149: }
4150: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
4151: &escape($upass),$unhome);
4152: unless ($reply eq 'ok') {
4153: return 'error: '.$reply;
4154: }
4155: $uhome=&homeserver($uname,$udom,'true');
4156: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
4157: return 'error: unable verify users home machine.';
4158: }
4159: } # End of creation of new user
4160: # ---------------------------------------------------------------------- Add ID
4161: if ($uid) {
4162: $uid=~tr/A-Z/a-z/;
4163: my %uidhash=&idrget($udom,$uname);
4164: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
4165: && (!$forceid)) {
4166: unless ($uid eq $uidhash{$uname}) {
4167: return 'error: user id "'.$uid.'" does not match '.
4168: 'current user id "'.$uidhash{$uname}.'".';
4169: }
4170: } else {
4171: &idput($udom,($uname => $uid));
4172: }
4173: }
4174: # -------------------------------------------------------------- Add names, etc
4175: my @tmp=&get('environment',
4176: ['firstname','middlename','lastname','generation'],
4177: $udom,$uname);
4178: my %names;
4179: if ($tmp[0] =~ m/^error:.*/) {
4180: %names=();
4181: } else {
4182: %names = @tmp;
4183: }
4184: #
4185: # Make sure to not trash student environment if instructor does not bother
4186: # to supply name and email information
4187: #
4188: if ($first) { $names{'firstname'} = $first; }
4189: if (defined($middle)) { $names{'middlename'} = $middle; }
4190: if ($last) { $names{'lastname'} = $last; }
4191: if (defined($gene)) { $names{'generation'} = $gene; }
4192: if ($email) {
4193: $email=~s/[^\w\@\.\-\,]//gs;
4194: if ($email=~/\@/) { $names{'notification'} = $email;
4195: $names{'critnotification'} = $email;
4196: $names{'permanentemail'} = $email; }
4197: }
4198: my $reply = &put('environment', \%names, $udom,$uname);
4199: if ($reply ne 'ok') { return 'error: '.$reply; }
4200: &devalidate_cache_new('namescache',$uname.':'.$udom);
4201: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
4202: $umode.', '.$first.', '.$middle.', '.
4203: $last.', '.$gene.' by '.
4204: $env{'user.name'}.' at '.$env{'user.domain'});
4205: return 'ok';
4206: }
4207:
4208: # -------------------------------------------------------------- Modify student
4209:
4210: sub modifystudent {
4211: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
4212: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
4213: if (!$cid) {
4214: unless ($cid=$env{'request.course.id'}) {
4215: return 'not_in_class';
4216: }
4217: }
4218: # --------------------------------------------------------------- Make the user
4219: my $reply=&modifyuser
4220: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
4221: $desiredhome,$email);
4222: unless ($reply eq 'ok') { return $reply; }
4223: # This will cause &modify_student_enrollment to get the uid from the
4224: # students environment
4225: $uid = undef if (!$forceid);
4226: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
4227: $gene,$usec,$end,$start,$type,$locktype,$cid);
4228: return $reply;
4229: }
4230:
4231: sub modify_student_enrollment {
4232: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
4233: my ($cdom,$cnum,$chome);
4234: if (!$cid) {
4235: unless ($cid=$env{'request.course.id'}) {
4236: return 'not_in_class';
4237: }
4238: $cdom=$env{'course.'.$cid.'.domain'};
4239: $cnum=$env{'course.'.$cid.'.num'};
4240: } else {
4241: ($cdom,$cnum)=split(/_/,$cid);
4242: }
4243: $chome=$env{'course.'.$cid.'.home'};
4244: if (!$chome) {
4245: $chome=&homeserver($cnum,$cdom);
4246: }
4247: if (!$chome) { return 'unknown_course'; }
4248: # Make sure the user exists
4249: my $uhome=&homeserver($uname,$udom);
4250: if (($uhome eq '') || ($uhome eq 'no_host')) {
4251: return 'error: no such user';
4252: }
4253: # Get student data if we were not given enough information
4254: if (!defined($first) || $first eq '' ||
4255: !defined($last) || $last eq '' ||
4256: !defined($uid) || $uid eq '' ||
4257: !defined($middle) || $middle eq '' ||
4258: !defined($gene) || $gene eq '') {
4259: # They did not supply us with enough data to enroll the student, so
4260: # we need to pick up more information.
4261: my %tmp = &get('environment',
4262: ['firstname','middlename','lastname', 'generation','id']
4263: ,$udom,$uname);
4264:
4265: #foreach (keys(%tmp)) {
4266: # &logthis("key $_ = ".$tmp{$_});
4267: #}
4268: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
4269: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
4270: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
4271: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
4272: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
4273: }
4274: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
4275: my $reply=cput('classlist',
4276: {"$uname:$udom" =>
4277: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
4278: $cdom,$cnum);
4279: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
4280: return 'error: '.$reply;
4281: } else {
4282: &devalidate_getsection_cache($udom,$uname,$cid);
4283: }
4284: # Add student role to user
4285: my $uurl='/'.$cid;
4286: $uurl=~s/\_/\//g;
4287: if ($usec) {
4288: $uurl.='/'.$usec;
4289: }
4290: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
4291: }
4292:
4293: sub format_name {
4294: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
4295: my $name;
4296: if ($first ne 'lastname') {
4297: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
4298: } else {
4299: if ($lastname=~/\S/) {
4300: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
4301: $name=~s/\s+,/,/;
4302: } else {
4303: $name.= $firstname.' '.$middlename.' '.$generation;
4304: }
4305: }
4306: $name=~s/^\s+//;
4307: $name=~s/\s+$//;
4308: $name=~s/\s+/ /g;
4309: return $name;
4310: }
4311:
4312: # ------------------------------------------------- Write to course preferences
4313:
4314: sub writecoursepref {
4315: my ($courseid,%prefs)=@_;
4316: $courseid=~s/^\///;
4317: $courseid=~s/\_/\//g;
4318: my ($cdomain,$cnum)=split(/\//,$courseid);
4319: my $chome=homeserver($cnum,$cdomain);
4320: if (($chome eq '') || ($chome eq 'no_host')) {
4321: return 'error: no such course';
4322: }
4323: my $cstring='';
4324: foreach (keys %prefs) {
4325: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
4326: }
4327: $cstring=~s/\&$//;
4328: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
4329: }
4330:
4331: # ---------------------------------------------------------- Make/modify course
4332:
4333: sub createcourse {
4334: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
4335: $url=&declutter($url);
4336: my $cid='';
4337: unless (&allowed('ccc',$udom)) {
4338: return 'refused';
4339: }
4340: # ------------------------------------------------------------------- Create ID
4341: my $uname=int(1+rand(9)).
4342: ('a'..'z','A'..'Z','0'..'9')[int(rand(62))].
4343: substr($$.time,0,5).unpack("H8",pack("I32",time)).
4344: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4345: # ----------------------------------------------- Make sure that does not exist
4346: my $uhome=&homeserver($uname,$udom,'true');
4347: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4348: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
4349: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
4350: $uhome=&homeserver($uname,$udom,'true');
4351: unless (($uhome eq '') || ($uhome eq 'no_host')) {
4352: return 'error: unable to generate unique course-ID';
4353: }
4354: }
4355: # ------------------------------------------------ Check supplied server name
4356: $course_server = $env{'user.homeserver'} if (! defined($course_server));
4357: if (! exists($libserv{$course_server})) {
4358: return 'error:bad server name '.$course_server;
4359: }
4360: # ------------------------------------------------------------- Make the course
4361: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
4362: $course_server);
4363: unless ($reply eq 'ok') { return 'error: '.$reply; }
4364: $uhome=&homeserver($uname,$udom,'true');
4365: if (($uhome eq '') || ($uhome eq 'no_host')) {
4366: return 'error: no such course';
4367: }
4368: # ----------------------------------------------------------------- Course made
4369: # log existence
4370: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
4371: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
4372: &flushcourselogs();
4373: # set toplevel url
4374: my $topurl=$url;
4375: unless ($nonstandard) {
4376: # ------------------------------------------ For standard courses, make top url
4377: my $mapurl=&clutter($url);
4378: if ($mapurl eq '/res/') { $mapurl=''; }
4379: $env{'form.initmap'}=(<<ENDINITMAP);
4380: <map>
4381: <resource id="1" type="start"></resource>
4382: <resource id="2" src="$mapurl"></resource>
4383: <resource id="3" type="finish"></resource>
4384: <link index="1" from="1" to="2"></link>
4385: <link index="2" from="2" to="3"></link>
4386: </map>
4387: ENDINITMAP
4388: $topurl=&declutter(
4389: &finishuserfileupload($uname,$udom,'initmap','default.sequence')
4390: );
4391: }
4392: # ----------------------------------------------------------- Write preferences
4393: &writecoursepref($udom.'_'.$uname,
4394: ('description' => $description,
4395: 'url' => $topurl));
4396: return '/'.$udom.'/'.$uname;
4397: }
4398:
4399: # ---------------------------------------------------------- Assign Custom Role
4400:
4401: sub assigncustomrole {
4402: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
4403: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
4404: $end,$start,$deleteflag);
4405: }
4406:
4407: # ----------------------------------------------------------------- Revoke Role
4408:
4409: sub revokerole {
4410: my ($udom,$uname,$url,$role,$deleteflag)=@_;
4411: my $now=time;
4412: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
4413: }
4414:
4415: # ---------------------------------------------------------- Revoke Custom Role
4416:
4417: sub revokecustomrole {
4418: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
4419: my $now=time;
4420: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
4421: $deleteflag);
4422: }
4423:
4424: # ------------------------------------------------------------ Disk usage
4425: sub diskusage {
4426: my ($udom,$uname,$directoryRoot)=@_;
4427: $directoryRoot =~ s/\/$//;
4428: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
4429: return $listing;
4430: }
4431:
4432: sub is_locked {
4433: my ($file_name, $domain, $user) = @_;
4434: my @check;
4435: my $is_locked;
4436: push @check, $file_name;
4437: my %locked = &get('file_permissions',\@check,
4438: $env{'user.domain'},$env{'user.name'});
4439: my ($tmp)=keys(%locked);
4440: if ($tmp=~/^error:/) { undef(%locked); }
4441:
4442: if (ref($locked{$file_name}) eq 'ARRAY') {
4443: $is_locked = 'true';
4444: } else {
4445: $is_locked = 'false';
4446: }
4447: }
4448:
4449: # ------------------------------------------------------------- Mark as Read Only
4450:
4451: sub mark_as_readonly {
4452: my ($domain,$user,$files,$what) = @_;
4453: my %current_permissions = &dump('file_permissions',$domain,$user);
4454: my ($tmp)=keys(%current_permissions);
4455: if ($tmp=~/^error:/) { undef(%current_permissions); }
4456: foreach my $file (@{$files}) {
4457: push(@{$current_permissions{$file}},$what);
4458: }
4459: &put('file_permissions',\%current_permissions,$domain,$user);
4460: return;
4461: }
4462:
4463: # ------------------------------------------------------------Save Selected Files
4464:
4465: sub save_selected_files {
4466: my ($user, $path, @files) = @_;
4467: my $filename = $user."savedfiles";
4468: my @other_files = &files_not_in_path($user, $path);
4469: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4470: foreach my $file (@files) {
4471: print (OUT $env{'form.currentpath'}.$file."\n");
4472: }
4473: foreach my $file (@other_files) {
4474: print (OUT $file."\n");
4475: }
4476: close (OUT);
4477: return 'ok';
4478: }
4479:
4480: sub clear_selected_files {
4481: my ($user) = @_;
4482: my $filename = $user."savedfiles";
4483: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4484: print (OUT undef);
4485: close (OUT);
4486: return ("ok");
4487: }
4488:
4489: sub files_in_path {
4490: my ($user, $path) = @_;
4491: my $filename = $user."savedfiles";
4492: my %return_files;
4493: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4494: while (my $line_in = <IN>) {
4495: chomp ($line_in);
4496: my @paths_and_file = split (m!/!, $line_in);
4497: my $file_part = pop (@paths_and_file);
4498: my $path_part = join ('/', @paths_and_file);
4499: $path_part.='/';
4500: my $path_and_file = $path_part.$file_part;
4501: if ($path_part eq $path) {
4502: $return_files{$file_part}= 'selected';
4503: }
4504: }
4505: close (IN);
4506: return (\%return_files);
4507: }
4508:
4509: # called in portfolio select mode, to show files selected NOT in current directory
4510: sub files_not_in_path {
4511: my ($user, $path) = @_;
4512: my $filename = $user."savedfiles";
4513: my @return_files;
4514: my $path_part;
4515: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
4516: while (<IN>) {
4517: #ok, I know it's clunky, but I want it to work
4518: my @paths_and_file = split m!/!, $_;
4519: my $file_part = pop (@paths_and_file);
4520: chomp ($file_part);
4521: my $path_part = join ('/', @paths_and_file);
4522: $path_part .= '/';
4523: my $path_and_file = $path_part.$file_part;
4524: if ($path_part ne $path) {
4525: push (@return_files, ($path_and_file));
4526: }
4527: }
4528: close (OUT);
4529: return (@return_files);
4530: }
4531:
4532: #--------------------------------------------------------------Get Marked as Read Only
4533:
4534:
4535: sub get_marked_as_readonly {
4536: my ($domain,$user,$what) = @_;
4537: my %current_permissions = &dump('file_permissions',$domain,$user);
4538: my ($tmp)=keys(%current_permissions);
4539: if ($tmp=~/^error:/) { undef(%current_permissions); }
4540: my @readonly_files;
4541: my $cmp1=$what;
4542: if (ref($what)) { $cmp1=join('',@{$what}) };
4543: while (my ($file_name,$value) = each(%current_permissions)) {
4544: if (ref($value) eq "ARRAY"){
4545: foreach my $stored_what (@{$value}) {
4546: my $cmp2=$stored_what;
4547: if (ref($stored_what)) { $cmp2=join('',@{$stored_what}) };
4548: if ($cmp1 eq $cmp2) {
4549: push(@readonly_files, $file_name);
4550: } elsif (!defined($what)) {
4551: push(@readonly_files, $file_name);
4552: }
4553: }
4554: }
4555: }
4556: return @readonly_files;
4557: }
4558: #-----------------------------------------------------------Get Marked as Read Only Hash
4559:
4560: sub get_marked_as_readonly_hash {
4561: my ($domain,$user,$what) = @_;
4562: my %current_permissions = &dump('file_permissions',$domain,$user);
4563: my ($tmp)=keys(%current_permissions);
4564: if ($tmp=~/^error:/) { undef(%current_permissions); }
4565:
4566: my %readonly_files;
4567: while (my ($file_name,$value) = each(%current_permissions)) {
4568: if (ref($value) eq "ARRAY"){
4569: foreach my $stored_what (@{$value}) {
4570: if ($stored_what eq $what) {
4571: $readonly_files{$file_name} = 'locked';
4572: } elsif (!defined($what)) {
4573: $readonly_files{$file_name} = 'locked';
4574: }
4575: }
4576: }
4577: }
4578: return %readonly_files;
4579: }
4580: # ------------------------------------------------------------ Unmark as Read Only
4581:
4582: sub unmark_as_readonly {
4583: # unmarks $file_name (if $file_name is defined), or all files locked by $what
4584: # for portfolio submissions, $what contains [$symb,$crsid]
4585: my ($domain,$user,$what,$file_name) = @_;
4586: my $symb_crs = $what;
4587: if (ref($what)) { $symb_crs=join('',@$what); }
4588: my %current_permissions = &dump('file_permissions',$domain,$user);
4589: my ($tmp)=keys(%current_permissions);
4590: if ($tmp=~/^error:/) { undef(%current_permissions); }
4591: my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
4592: foreach my $file (@readonly_files) {
4593: if (defined($file_name) && ($file_name ne $file)) { next; }
4594: my $current_locks = $current_permissions{$file};
4595: my @new_locks;
4596: my @del_keys;
4597: if (ref($current_locks) eq "ARRAY"){
4598: foreach my $locker (@{$current_locks}) {
4599: my $compare=$locker;
4600: if (ref($locker)) { $compare=join('',@{$locker}) };
4601: if ($compare ne $symb_crs) {
4602: push(@new_locks, $locker);
4603: }
4604: }
4605: if (scalar(@new_locks) > 0) {
4606: $current_permissions{$file} = \@new_locks;
4607: } else {
4608: push(@del_keys, $file);
4609: &del('file_permissions',\@del_keys, $domain, $user);
4610: delete($current_permissions{$file});
4611: }
4612: }
4613: }
4614: &put('file_permissions',\%current_permissions,$domain,$user);
4615: return;
4616: }
4617:
4618: # ------------------------------------------------------------ Directory lister
4619:
4620: sub dirlist {
4621: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
4622:
4623: $uri=~s/^\///;
4624: $uri=~s/\/$//;
4625: my ($udom, $uname);
4626: (undef,$udom,$uname)=split(/\//,$uri);
4627: if(defined($userdomain)) {
4628: $udom = $userdomain;
4629: }
4630: if(defined($username)) {
4631: $uname = $username;
4632: }
4633:
4634: my $dirRoot = $perlvar{'lonDocRoot'};
4635: if(defined($alternateDirectoryRoot)) {
4636: $dirRoot = $alternateDirectoryRoot;
4637: $dirRoot =~ s/\/$//;
4638: }
4639:
4640: if($udom) {
4641: if($uname) {
4642: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
4643: homeserver($uname,$udom));
4644: my @listing_results;
4645: if ($listing eq 'unknown_cmd') {
4646: $listing=reply('ls:'.$dirRoot.'/'.$uri,
4647: homeserver($uname,$udom));
4648: @listing_results = split(/:/,$listing);
4649: } else {
4650: @listing_results = map { &unescape($_); } split(/:/,$listing);
4651: }
4652: return @listing_results;
4653: } elsif(!defined($alternateDirectoryRoot)) {
4654: my $tryserver;
4655: my %allusers=();
4656: foreach $tryserver (keys %libserv) {
4657: if($hostdom{$tryserver} eq $udom) {
4658: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
4659: $udom, $tryserver);
4660: my @listing_results;
4661: if ($listing eq 'unknown_cmd') {
4662: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
4663: $udom, $tryserver);
4664: @listing_results = split(/:/,$listing);
4665: } else {
4666: @listing_results =
4667: map { &unescape($_); } split(/:/,$listing);
4668: }
4669: if ($listing_results[0] ne 'no_such_dir' &&
4670: $listing_results[0] ne 'empty' &&
4671: $listing_results[0] ne 'con_lost') {
4672: foreach (@listing_results) {
4673: my ($entry,@stat)=split(/&/,$_);
4674: $allusers{$entry}=1;
4675: }
4676: }
4677: }
4678: }
4679: my $alluserstr='';
4680: foreach (sort keys %allusers) {
4681: $alluserstr.=$_.'&user:';
4682: }
4683: $alluserstr=~s/:$//;
4684: return split(/:/,$alluserstr);
4685: } else {
4686: my @emptyResults = ();
4687: push(@emptyResults, 'missing user name');
4688: return split(':',@emptyResults);
4689: }
4690: } elsif(!defined($alternateDirectoryRoot)) {
4691: my $tryserver;
4692: my %alldom=();
4693: foreach $tryserver (keys %libserv) {
4694: $alldom{$hostdom{$tryserver}}=1;
4695: }
4696: my $alldomstr='';
4697: foreach (sort keys %alldom) {
4698: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
4699: }
4700: $alldomstr=~s/:$//;
4701: return split(/:/,$alldomstr);
4702: } else {
4703: my @emptyResults = ();
4704: push(@emptyResults, 'missing domain');
4705: return split(':',@emptyResults);
4706: }
4707: }
4708:
4709: # --------------------------------------------- GetFileTimestamp
4710: # This function utilizes dirlist and returns the date stamp for
4711: # when it was last modified. It will also return an error of -1
4712: # if an error occurs
4713:
4714: ##
4715: ## FIXME: This subroutine assumes its caller knows something about the
4716: ## directory structure of the home server for the student ($root).
4717: ## Not a good assumption to make. Since this is for looking up files
4718: ## in user directories, the full path should be constructed by lond, not
4719: ## whatever machine we request data from.
4720: ##
4721: sub GetFileTimestamp {
4722: my ($studentDomain,$studentName,$filename,$root)=@_;
4723: $studentDomain=~s/\W//g;
4724: $studentName=~s/\W//g;
4725: my $subdir=$studentName.'__';
4726: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4727: my $proname="$studentDomain/$subdir/$studentName";
4728: $proname .= '/'.$filename;
4729: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4730: $studentName, $root);
4731: my @stats = split('&', $fileStat);
4732: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4733: # @stats contains first the filename, then the stat output
4734: return $stats[10]; # so this is 10 instead of 9.
4735: } else {
4736: return -1;
4737: }
4738: }
4739:
4740: sub stat_file {
4741: my ($uri) = @_;
4742: $uri = &clutter($uri);
4743: my ($udom,$uname,$file,$dir);
4744: if ($uri =~ m-^/(uploaded|editupload)/-) {
4745: ($udom,$uname,$file) =
4746: ($uri =~ m-/(?:uploaded|editupload)/?([^/]*)/?([^/]*)/?(.*)-);
4747: $file = 'userfiles/'.$file;
4748: $dir = &Apache::loncommon::propath($udom,$uname);
4749: }
4750: if ($uri =~ m-^/res/-) {
4751: ($udom,$uname) =
4752: ($uri =~ m-/(?:res)/?([^/]*)/?([^/]*)/-);
4753: $file = $uri;
4754: }
4755:
4756: if (!$udom || !$uname || !$file) {
4757: # unable to handle the uri
4758: return ();
4759: }
4760:
4761: my ($result) = &dirlist($file,$udom,$uname,$dir);
4762: my @stats = split('&', $result);
4763: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4764: shift(@stats); #filename is first
4765: return @stats;
4766: }
4767: return ();
4768: }
4769:
4770: # -------------------------------------------------------- Value of a Condition
4771:
4772: # gets the value of a specific preevaluated condition
4773: # stored in the string $env{user.state.<cid>}
4774: # or looks up a condition reference in the bighash and if if hasn't
4775: # already been evaluated recurses into docondval to get the value of
4776: # the condition, then memoizing it to
4777: # $env{user.state.<cid>.<condition>}
4778: sub directcondval {
4779: my $number=shift;
4780: if (!defined($env{'user.state.'.$env{'request.course.id'}})) {
4781: &Apache::lonuserstate::evalstate();
4782: }
4783: if (exists($env{'user.state.'.$env{'request.course.id'}.".$number"})) {
4784: return $env{'user.state.'.$env{'request.course.id'}.".$number"};
4785: } elsif ($number =~ /^_/) {
4786: my $sub_condition;
4787: if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
4788: &GDBM_READER(),0640)) {
4789: $sub_condition=$bighash{'conditions'.$number};
4790: untie(%bighash);
4791: }
4792: my $value = &docondval($sub_condition);
4793: &appenv('user.state.'.$env{'request.course.id'}.".$number" => $value);
4794: return $value;
4795: }
4796: if ($env{'user.state.'.$env{'request.course.id'}}) {
4797: return substr($env{'user.state.'.$env{'request.course.id'}},$number,1);
4798: } else {
4799: return 2;
4800: }
4801: }
4802:
4803: # get the collection of conditions for this resource
4804: sub condval {
4805: my $condidx=shift;
4806: my $allpathcond='';
4807: foreach my $cond (split(/\|/,$condidx)) {
4808: if (defined($env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond})) {
4809: $allpathcond.=
4810: '('.$env{'acc.cond.'.$env{'request.course.id'}.'.'.$cond}.')|';
4811: }
4812: }
4813: $allpathcond=~s/\|$//;
4814: return &docondval($allpathcond);
4815: }
4816:
4817: #evaluates an expression of conditions
4818: sub docondval {
4819: my ($allpathcond) = @_;
4820: my $result=0;
4821: if ($env{'request.course.id'}
4822: && defined($allpathcond)) {
4823: my $operand='|';
4824: my @stack;
4825: foreach my $chunk ($allpathcond=~/(\d+|_\d+\.\d+|\(|\)|\&|\|)/g) {
4826: if ($chunk eq '(') {
4827: push @stack,($operand,$result);
4828: } elsif ($chunk eq ')') {
4829: my $before=pop @stack;
4830: if (pop @stack eq '&') {
4831: $result=$result>$before?$before:$result;
4832: } else {
4833: $result=$result>$before?$result:$before;
4834: }
4835: } elsif (($chunk eq '&') || ($chunk eq '|')) {
4836: $operand=$chunk;
4837: } else {
4838: my $new=directcondval($chunk);
4839: if ($operand eq '&') {
4840: $result=$result>$new?$new:$result;
4841: } else {
4842: $result=$result>$new?$result:$new;
4843: }
4844: }
4845: }
4846: }
4847: return $result;
4848: }
4849:
4850: # ---------------------------------------------------- Devalidate courseresdata
4851:
4852: sub devalidatecourseresdata {
4853: my ($coursenum,$coursedomain)=@_;
4854: my $hashid=$coursenum.':'.$coursedomain;
4855: &devalidate_cache_new('courseres',$hashid);
4856: }
4857:
4858: # --------------------------------------------------- Course Resourcedata Query
4859:
4860: sub get_courseresdata {
4861: my ($coursenum,$coursedomain)=@_;
4862: my $coursehom=&homeserver($coursenum,$coursedomain);
4863: my $hashid=$coursenum.':'.$coursedomain;
4864: my ($result,$cached)=&is_cached_new('courseres',$hashid);
4865: my %dumpreply;
4866: unless (defined($cached)) {
4867: %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4868: $result=\%dumpreply;
4869: my ($tmp) = keys(%dumpreply);
4870: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4871: &do_cache_new('courseres',$hashid,$result,600);
4872: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4873: return $tmp;
4874: } elsif ($tmp =~ /^(error)/) {
4875: $result=undef;
4876: &do_cache_new('courseres',$hashid,$result,600);
4877: }
4878: }
4879: return $result;
4880: }
4881:
4882: sub devalidateuserresdata {
4883: my ($uname,$udom)=@_;
4884: my $hashid="$udom:$uname";
4885: &devalidate_cache_new('userres',$hashid);
4886: }
4887:
4888: sub get_userresdata {
4889: my ($uname,$udom)=@_;
4890: #most student don\'t have any data set, check if there is some data
4891: if (&EXT_cache_status($udom,$uname)) { return undef; }
4892:
4893: my $hashid="$udom:$uname";
4894: my ($result,$cached)=&is_cached_new('userres',$hashid);
4895: if (!defined($cached)) {
4896: my %resourcedata=&dump('resourcedata',$udom,$uname);
4897: $result=\%resourcedata;
4898: &do_cache_new('userres',$hashid,$result,600);
4899: }
4900: my ($tmp)=keys(%$result);
4901: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4902: return $result;
4903: }
4904: #error 2 occurs when the .db doesn't exist
4905: if ($tmp!~/error: 2 /) {
4906: &logthis("<font color=\"blue\">WARNING:".
4907: " Trying to get resource data for ".
4908: $uname." at ".$udom.": ".
4909: $tmp."</font>");
4910: } elsif ($tmp=~/error: 2 /) {
4911: #&EXT_cache_set($udom,$uname);
4912: &do_cache_new('userres',$hashid,undef,600);
4913: undef($tmp); # not really an error so don't send it back
4914: }
4915: return $tmp;
4916: }
4917:
4918: sub resdata {
4919: my ($name,$domain,$type,@which)=@_;
4920: my $result;
4921: if ($type eq 'course') {
4922: $result=&get_courseresdata($name,$domain);
4923: } elsif ($type eq 'user') {
4924: $result=&get_userresdata($name,$domain);
4925: }
4926: if (!ref($result)) { return $result; }
4927: foreach my $item (@which) {
4928: if (defined($result->{$item})) {
4929: return $result->{$item};
4930: }
4931: }
4932: return undef;
4933: }
4934:
4935: #
4936: # EXT resource caching routines
4937: #
4938:
4939: sub clear_EXT_cache_status {
4940: &delenv('cache.EXT.');
4941: }
4942:
4943: sub EXT_cache_status {
4944: my ($target_domain,$target_user) = @_;
4945: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4946: if (exists($env{$cachename}) && ($env{$cachename}+600) > time) {
4947: # We know already the user has no data
4948: return 1;
4949: } else {
4950: return 0;
4951: }
4952: }
4953:
4954: sub EXT_cache_set {
4955: my ($target_domain,$target_user) = @_;
4956: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4957: #&appenv($cachename => time);
4958: }
4959:
4960: # --------------------------------------------------------- Value of a Variable
4961: sub EXT {
4962:
4963: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4964: unless ($varname) { return ''; }
4965: #get real user name/domain, courseid and symb
4966: my $courseid;
4967: my $publicuser;
4968: if ($symbparm) {
4969: $symbparm=&get_symb_from_alias($symbparm);
4970: }
4971: if (!($uname && $udom)) {
4972: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4973: &Apache::lonxml::whichuser($symbparm);
4974: if (!$symbparm) { $symbparm=$cursymb; }
4975: } else {
4976: $courseid=$env{'request.course.id'};
4977: }
4978: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4979: my $rest;
4980: if (defined($therest[0])) {
4981: $rest=join('.',@therest);
4982: } else {
4983: $rest='';
4984: }
4985:
4986: my $qualifierrest=$qualifier;
4987: if ($rest) { $qualifierrest.='.'.$rest; }
4988: my $spacequalifierrest=$space;
4989: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4990: if ($realm eq 'user') {
4991: # --------------------------------------------------------------- user.resource
4992: if ($space eq 'resource') {
4993: if ( (defined($Apache::lonhomework::parsing_a_problem)
4994: || defined($Apache::lonhomework::parsing_a_task))
4995: &&
4996: ($symbparm eq &symbread()) ) {
4997: return $Apache::lonhomework::history{$qualifierrest};
4998: } else {
4999: my %restored;
5000: if ($publicuser || $env{'request.state'} eq 'construct') {
5001: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
5002: } else {
5003: %restored=&restore($symbparm,$courseid,$udom,$uname);
5004: }
5005: return $restored{$qualifierrest};
5006: }
5007: # ----------------------------------------------------------------- user.access
5008: } elsif ($space eq 'access') {
5009: # FIXME - not supporting calls for a specific user
5010: return &allowed($qualifier,$rest);
5011: # ------------------------------------------ user.preferences, user.environment
5012: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
5013: if (($uname eq $env{'user.name'}) &&
5014: ($udom eq $env{'user.domain'})) {
5015: return $env{join('.',('environment',$qualifierrest))};
5016: } else {
5017: my %returnhash;
5018: if (!$publicuser) {
5019: %returnhash=&userenvironment($udom,$uname,
5020: $qualifierrest);
5021: }
5022: return $returnhash{$qualifierrest};
5023: }
5024: # ----------------------------------------------------------------- user.course
5025: } elsif ($space eq 'course') {
5026: # FIXME - not supporting calls for a specific user
5027: return $env{join('.',('request.course',$qualifier))};
5028: # ------------------------------------------------------------------- user.role
5029: } elsif ($space eq 'role') {
5030: # FIXME - not supporting calls for a specific user
5031: my ($role,$where)=split(/\./,$env{'request.role'});
5032: if ($qualifier eq 'value') {
5033: return $role;
5034: } elsif ($qualifier eq 'extent') {
5035: return $where;
5036: }
5037: # ----------------------------------------------------------------- user.domain
5038: } elsif ($space eq 'domain') {
5039: return $udom;
5040: # ------------------------------------------------------------------- user.name
5041: } elsif ($space eq 'name') {
5042: return $uname;
5043: # ---------------------------------------------------- Any other user namespace
5044: } else {
5045: my %reply;
5046: if (!$publicuser) {
5047: %reply=&get($space,[$qualifierrest],$udom,$uname);
5048: }
5049: return $reply{$qualifierrest};
5050: }
5051: } elsif ($realm eq 'query') {
5052: # ---------------------------------------------- pull stuff out of query string
5053: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
5054: [$spacequalifierrest]);
5055: return $env{'form.'.$spacequalifierrest};
5056: } elsif ($realm eq 'request') {
5057: # ------------------------------------------------------------- request.browser
5058: if ($space eq 'browser') {
5059: if ($qualifier eq 'textremote') {
5060: if (&Apache::lonlocal::mt('textual_remote_display') eq 'on') {
5061: return 1;
5062: } else {
5063: return 0;
5064: }
5065: } else {
5066: return $env{'browser.'.$qualifier};
5067: }
5068: # ------------------------------------------------------------ request.filename
5069: } else {
5070: return $env{'request.'.$spacequalifierrest};
5071: }
5072: } elsif ($realm eq 'course') {
5073: # ---------------------------------------------------------- course.description
5074: return $env{'course.'.$courseid.'.'.$spacequalifierrest};
5075: } elsif ($realm eq 'resource') {
5076:
5077: if (defined($courseid) && $courseid eq $env{'request.course.id'}) {
5078: if (!$symbparm) { $symbparm=&symbread(); }
5079: }
5080:
5081: if ($space eq 'title') {
5082: if (!$symbparm) { $symbparm = $env{'request.filename'}; }
5083: return &gettitle($symbparm);
5084: }
5085:
5086: if ($space eq 'map') {
5087: my ($map) = &decode_symb($symbparm);
5088: return &symbread($map);
5089: }
5090:
5091: my ($section, $group, @groups);
5092: my ($courselevelm,$courselevel);
5093: if ($symbparm && defined($courseid) &&
5094: $courseid eq $env{'request.course.id'}) {
5095:
5096: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
5097:
5098: # ----------------------------------------------------- Cascading lookup scheme
5099: my $symbp=$symbparm;
5100: my $mapp=(&decode_symb($symbp))[0];
5101:
5102: my $symbparm=$symbp.'.'.$spacequalifierrest;
5103: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
5104:
5105: if (($env{'user.name'} eq $uname) &&
5106: ($env{'user.domain'} eq $udom)) {
5107: $section=$env{'request.course.sec'};
5108: @groups=&sort_course_groups($env{'request.course.groups'},$courseid);
5109: if (@groups > 0) {
5110: @groups = sort(@groups);
5111: }
5112: } else {
5113: if (! defined($usection)) {
5114: $section=&getsection($udom,$uname,$courseid);
5115: } else {
5116: $section = $usection;
5117: }
5118: my $grouplist = &get_users_groups($udom,$uname,$courseid);
5119: if ($grouplist) {
5120: @groups=&sort_course_groups($grouplist,$courseid);
5121: }
5122: }
5123:
5124: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
5125: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
5126: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
5127:
5128: $courselevel=$courseid.'.'.$spacequalifierrest;
5129: my $courselevelr=$courseid.'.'.$symbparm;
5130: $courselevelm=$courseid.'.'.$mapparm;
5131:
5132: # ----------------------------------------------------------- first, check user
5133:
5134: my $userreply=&resdata($uname,$udom,'user',
5135: ($courselevelr,$courselevelm,
5136: $courselevel));
5137: if (defined($userreply)) { return $userreply; }
5138:
5139: # ------------------------------------------------ second, check some of course
5140: my $coursereply;
5141: if (@groups > 0) {
5142: $coursereply = &check_group_parms($courseid,\@groups,$symbparm,
5143: $mapparm,$spacequalifierrest);
5144: if (defined($coursereply)) { return $coursereply; }
5145: }
5146:
5147: $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5148: $env{'course.'.$courseid.'.domain'},
5149: 'course',
5150: ($seclevelr,$seclevelm,$seclevel,
5151: $courselevelr));
5152: if (defined($coursereply)) { return $coursereply; }
5153:
5154: # ------------------------------------------------------ third, check map parms
5155: my %parmhash=();
5156: my $thisparm='';
5157: if (tie(%parmhash,'GDBM_File',
5158: $env{'request.course.fn'}.'_parms.db',
5159: &GDBM_READER(),0640)) {
5160: $thisparm=$parmhash{$symbparm};
5161: untie(%parmhash);
5162: }
5163: if ($thisparm) { return $thisparm; }
5164: }
5165: # ------------------------------------------ fourth, look in resource metadata
5166:
5167: $spacequalifierrest=~s/\./\_/;
5168: my $filename;
5169: if (!$symbparm) { $symbparm=&symbread(); }
5170: if ($symbparm) {
5171: $filename=(&decode_symb($symbparm))[2];
5172: } else {
5173: $filename=$env{'request.filename'};
5174: }
5175: my $metadata=&metadata($filename,$spacequalifierrest);
5176: if (defined($metadata)) { return $metadata; }
5177: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
5178: if (defined($metadata)) { return $metadata; }
5179:
5180: # ---------------------------------------------- fourth, look in rest pf course
5181: if ($symbparm && defined($courseid) &&
5182: $courseid eq $env{'request.course.id'}) {
5183: my $coursereply=&resdata($env{'course.'.$courseid.'.num'},
5184: $env{'course.'.$courseid.'.domain'},
5185: 'course',
5186: ($courselevelm,$courselevel));
5187: if (defined($coursereply)) { return $coursereply; }
5188: }
5189: # ------------------------------------------------------------------ Cascade up
5190: unless ($space eq '0') {
5191: my @parts=split(/_/,$space);
5192: my $id=pop(@parts);
5193: my $part=join('_',@parts);
5194: if ($part eq '') { $part='0'; }
5195: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
5196: $symbparm,$udom,$uname,$section,1);
5197: if (defined($partgeneral)) { return $partgeneral; }
5198: }
5199: if ($recurse) { return undef; }
5200: my $pack_def=&packages_tab_default($filename,$varname);
5201: if (defined($pack_def)) { return $pack_def; }
5202:
5203: # ---------------------------------------------------- Any other user namespace
5204: } elsif ($realm eq 'environment') {
5205: # ----------------------------------------------------------------- environment
5206: if (($uname eq $env{'user.name'})&&($udom eq $env{'user.domain'})) {
5207: return $env{'environment.'.$spacequalifierrest};
5208: } else {
5209: my %returnhash=&userenvironment($udom,$uname,
5210: $spacequalifierrest);
5211: return $returnhash{$spacequalifierrest};
5212: }
5213: } elsif ($realm eq 'system') {
5214: # ----------------------------------------------------------------- system.time
5215: if ($space eq 'time') {
5216: return time;
5217: }
5218: } elsif ($realm eq 'server') {
5219: # ----------------------------------------------------------------- system.time
5220: if ($space eq 'name') {
5221: return $ENV{'SERVER_NAME'};
5222: }
5223: }
5224: return '';
5225: }
5226:
5227: sub check_group_parms {
5228: my ($courseid,$groups,$symbparm,$mapparm,$what) = @_;
5229: my @groupitems = ();
5230: my $resultitem;
5231: my @levels = ($symbparm,$mapparm,$what);
5232: foreach my $group (@{$groups}) {
5233: foreach my $level (@levels) {
5234: my $item = $courseid.'.['.$group.'].'.$level;
5235: push(@groupitems,$item);
5236: }
5237: }
5238: my $coursereply = &resdata($env{'course.'.$courseid.'.num'},
5239: $env{'course.'.$courseid.'.domain'},
5240: 'course',@groupitems);
5241: return $coursereply;
5242: }
5243:
5244: sub sort_course_groups { # Sort groups based on defined rankings. Default is sort().
5245: my ($grouplist,$courseid) = @_;
5246: my @groups = sort(split(/:/,$grouplist));
5247: return @groups;
5248: }
5249:
5250: sub packages_tab_default {
5251: my ($uri,$varname)=@_;
5252: my (undef,$part,$name)=split(/\./,$varname);
5253: my $packages=&metadata($uri,'packages');
5254: foreach my $package (split(/,/,$packages)) {
5255: my ($pack_type,$pack_part)=split(/_/,$package,2);
5256: if (defined($packagetab{"$pack_type&$name&default"})) {
5257: return $packagetab{"$pack_type&$name&default"};
5258: }
5259: if ($pack_type eq 'part') { $pack_part='0'; }
5260: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
5261: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
5262: }
5263: }
5264: return undef;
5265: }
5266:
5267: sub add_prefix_and_part {
5268: my ($prefix,$part)=@_;
5269: my $keyroot;
5270: if (defined($prefix) && $prefix !~ /^__/) {
5271: # prefix that has a part already
5272: $keyroot=$prefix;
5273: } elsif (defined($prefix)) {
5274: # prefix that is missing a part
5275: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
5276: } else {
5277: # no prefix at all
5278: if (defined($part)) { $keyroot='_'.$part; }
5279: }
5280: return $keyroot;
5281: }
5282:
5283: # ---------------------------------------------------------------- Get metadata
5284:
5285: my %metaentry;
5286: sub metadata {
5287: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
5288: $uri=&declutter($uri);
5289: # if it is a non metadata possible uri return quickly
5290: if (($uri eq '') ||
5291: (($uri =~ m|^/*adm/|) &&
5292: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
5293: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
5294: ($uri =~ m|home/[^/]+/public_html/|)) {
5295: return undef;
5296: }
5297: my $filename=$uri;
5298: $uri=~s/\.meta$//;
5299: #
5300: # Is the metadata already cached?
5301: # Look at timestamp of caching
5302: # Everything is cached by the main uri, libraries are never directly cached
5303: #
5304: if (!defined($liburi)) {
5305: my ($result,$cached)=&is_cached_new('meta',$uri);
5306: if (defined($cached)) { return $result->{':'.$what}; }
5307: }
5308: {
5309: #
5310: # Is this a recursive call for a library?
5311: #
5312: # if (! exists($metacache{$uri})) {
5313: # $metacache{$uri}={};
5314: # }
5315: if ($liburi) {
5316: $liburi=&declutter($liburi);
5317: $filename=$liburi;
5318: } else {
5319: &devalidate_cache_new('meta',$uri);
5320: undef(%metaentry);
5321: }
5322: my %metathesekeys=();
5323: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
5324: my $metastring;
5325: if ($uri !~ m -^(uploaded|editupload)/-) {
5326: my $file=&filelocation('',&clutter($filename));
5327: #push(@{$metaentry{$uri.'.file'}},$file);
5328: $metastring=&getfile($file);
5329: }
5330: my $parser=HTML::LCParser->new(\$metastring);
5331: my $token;
5332: undef %metathesekeys;
5333: while ($token=$parser->get_token) {
5334: if ($token->[0] eq 'S') {
5335: if (defined($token->[2]->{'package'})) {
5336: #
5337: # This is a package - get package info
5338: #
5339: my $package=$token->[2]->{'package'};
5340: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5341: if (defined($token->[2]->{'id'})) {
5342: $keyroot.='_'.$token->[2]->{'id'};
5343: }
5344: if ($metaentry{':packages'}) {
5345: $metaentry{':packages'}.=','.$package.$keyroot;
5346: } else {
5347: $metaentry{':packages'}=$package.$keyroot;
5348: }
5349: foreach (sort keys %packagetab) {
5350: my $part=$keyroot;
5351: $part=~s/^\_//;
5352: if ($_=~/^\Q$package\E\&/ ||
5353: $_=~/^\Q$package\E_0\&/) {
5354: my ($pack,$name,$subp)=split(/\&/,$_);
5355: # ignore package.tab specified default values
5356: # here &package_tab_default() will fetch those
5357: if ($subp eq 'default') { next; }
5358: my $value=$packagetab{$_};
5359: my $unikey;
5360: if ($pack =~ /_0$/) {
5361: $unikey='parameter_0_'.$name;
5362: $part=0;
5363: } else {
5364: $unikey='parameter'.$keyroot.'_'.$name;
5365: }
5366: if ($subp eq 'display') {
5367: $value.=' [Part: '.$part.']';
5368: }
5369: $metaentry{':'.$unikey.'.part'}=$part;
5370: $metathesekeys{$unikey}=1;
5371: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5372: $metaentry{':'.$unikey.'.'.$subp}=$value;
5373: }
5374: if (defined($metaentry{':'.$unikey.'.default'})) {
5375: $metaentry{':'.$unikey}=
5376: $metaentry{':'.$unikey.'.default'};
5377: }
5378: }
5379: }
5380: } else {
5381: #
5382: # This is not a package - some other kind of start tag
5383: #
5384: my $entry=$token->[1];
5385: my $unikey;
5386: if ($entry eq 'import') {
5387: $unikey='';
5388: } else {
5389: $unikey=$entry;
5390: }
5391: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
5392:
5393: if (defined($token->[2]->{'id'})) {
5394: $unikey.='_'.$token->[2]->{'id'};
5395: }
5396:
5397: if ($entry eq 'import') {
5398: #
5399: # Importing a library here
5400: #
5401: if ($depthcount<20) {
5402: my $location=$parser->get_text('/import');
5403: my $dir=$filename;
5404: $dir=~s|[^/]*$||;
5405: $location=&filelocation($dir,$location);
5406: foreach (sort(split(/\,/,&metadata($uri,'keys',
5407: $location,$unikey,
5408: $depthcount+1)))) {
5409: $metaentry{':'.$_}=$metaentry{':'.$_};
5410: $metathesekeys{$_}=1;
5411: }
5412: }
5413: } else {
5414:
5415: if (defined($token->[2]->{'name'})) {
5416: $unikey.='_'.$token->[2]->{'name'};
5417: }
5418: $metathesekeys{$unikey}=1;
5419: foreach (@{$token->[3]}) {
5420: $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
5421: }
5422: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
5423: my $default=$metaentry{':'.$unikey.'.default'};
5424: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
5425: # only ws inside the tag, and not in default, so use default
5426: # as value
5427: $metaentry{':'.$unikey}=$default;
5428: } else {
5429: # either something interesting inside the tag or default
5430: # uninteresting
5431: $metaentry{':'.$unikey}=$internaltext;
5432: }
5433: # end of not-a-package not-a-library import
5434: }
5435: # end of not-a-package start tag
5436: }
5437: # the next is the end of "start tag"
5438: }
5439: }
5440: my ($extension) = ($uri =~ /\.(\w+)$/);
5441: foreach my $key (sort(keys(%packagetab))) {
5442: #no specific packages #how's our extension
5443: if ($key!~/^extension_\Q$extension\E&/) { next; }
5444: &metadata_create_package_def($uri,$key,'extension_'.$extension,
5445: \%metathesekeys);
5446: }
5447: if (!exists($metaentry{':packages'})) {
5448: foreach my $key (sort(keys(%packagetab))) {
5449: #no specific packages well let's get default then
5450: if ($key!~/^default&/) { next; }
5451: &metadata_create_package_def($uri,$key,'default',
5452: \%metathesekeys);
5453: }
5454: }
5455: # are there custom rights to evaluate
5456: if ($metaentry{':copyright'} eq 'custom') {
5457:
5458: #
5459: # Importing a rights file here
5460: #
5461: unless ($depthcount) {
5462: my $location=$metaentry{':customdistributionfile'};
5463: my $dir=$filename;
5464: $dir=~s|[^/]*$||;
5465: $location=&filelocation($dir,$location);
5466: foreach (sort(split(/\,/,&metadata($uri,'keys',
5467: $location,'_rights',
5468: $depthcount+1)))) {
5469: #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
5470: $metathesekeys{$_}=1;
5471: }
5472: }
5473: }
5474: $metaentry{':keys'}=join(',',keys %metathesekeys);
5475: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
5476: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
5477: &do_cache_new('meta',$uri,\%metaentry,60*60);
5478: # this is the end of "was not already recently cached
5479: }
5480: return $metaentry{':'.$what};
5481: }
5482:
5483: sub metadata_create_package_def {
5484: my ($uri,$key,$package,$metathesekeys)=@_;
5485: my ($pack,$name,$subp)=split(/\&/,$key);
5486: if ($subp eq 'default') { next; }
5487:
5488: if (defined($metaentry{':packages'})) {
5489: $metaentry{':packages'}.=','.$package;
5490: } else {
5491: $metaentry{':packages'}=$package;
5492: }
5493: my $value=$packagetab{$key};
5494: my $unikey;
5495: $unikey='parameter_0_'.$name;
5496: $metaentry{':'.$unikey.'.part'}=0;
5497: $$metathesekeys{$unikey}=1;
5498: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
5499: $metaentry{':'.$unikey.'.'.$subp}=$value;
5500: }
5501: if (defined($metaentry{':'.$unikey.'.default'})) {
5502: $metaentry{':'.$unikey}=
5503: $metaentry{':'.$unikey.'.default'};
5504: }
5505: }
5506:
5507: sub metadata_generate_part0 {
5508: my ($metadata,$metacache,$uri) = @_;
5509: my %allnames;
5510: foreach my $metakey (sort keys %$metadata) {
5511: if ($metakey=~/^parameter\_(.*)/) {
5512: my $part=$$metacache{':'.$metakey.'.part'};
5513: my $name=$$metacache{':'.$metakey.'.name'};
5514: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
5515: $allnames{$name}=$part;
5516: }
5517: }
5518: }
5519: foreach my $name (keys(%allnames)) {
5520: $$metadata{"parameter_0_$name"}=1;
5521: my $key=":parameter_0_$name";
5522: $$metacache{"$key.part"}='0';
5523: $$metacache{"$key.name"}=$name;
5524: $$metacache{"$key.type"}=$$metacache{':parameter_'.
5525: $allnames{$name}.'_'.$name.
5526: '.type'};
5527: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
5528: '.display'};
5529: my $expr='[Part: '.$allnames{$name}.']';
5530: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
5531: $$metacache{"$key.display"}=$olddis;
5532: }
5533: }
5534:
5535: # ------------------------------------------------- Get the title of a resource
5536:
5537: sub gettitle {
5538: my $urlsymb=shift;
5539: my $symb=&symbread($urlsymb);
5540: if ($symb) {
5541: my $key=$env{'request.course.id'}."\0".$symb;
5542: my ($result,$cached)=&is_cached_new('title',$key);
5543: if (defined($cached)) {
5544: return $result;
5545: }
5546: my ($map,$resid,$url)=&decode_symb($symb);
5547: my $title='';
5548: my %bighash;
5549: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5550: &GDBM_READER(),0640)) {
5551: my $mapid=$bighash{'map_pc_'.&clutter($map)};
5552: $title=$bighash{'title_'.$mapid.'.'.$resid};
5553: untie %bighash;
5554: }
5555: $title=~s/\&colon\;/\:/gs;
5556: if ($title) {
5557: return &do_cache_new('title',$key,$title,600);
5558: }
5559: $urlsymb=$url;
5560: }
5561: my $title=&metadata($urlsymb,'title');
5562: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
5563: return $title;
5564: }
5565:
5566: sub get_slot {
5567: my ($which,$cnum,$cdom)=@_;
5568: if (!$cnum || !$cdom) {
5569: (undef,my $courseid)=&Apache::lonxml::whichuser();
5570: $cdom=$env{'course.'.$courseid.'.domain'};
5571: $cnum=$env{'course.'.$courseid.'.num'};
5572: }
5573: my $key=join("\0",'slots',$cdom,$cnum,$which);
5574: my %slotinfo;
5575: if (exists($remembered{$key})) {
5576: $slotinfo{$which} = $remembered{$key};
5577: } else {
5578: %slotinfo=&get('slots',[$which],$cdom,$cnum);
5579: &Apache::lonhomework::showhash(%slotinfo);
5580: my ($tmp)=keys(%slotinfo);
5581: if ($tmp=~/^error:/) { return (); }
5582: $remembered{$key} = $slotinfo{$which};
5583: }
5584: if (ref($slotinfo{$which}) eq 'HASH') {
5585: return %{$slotinfo{$which}};
5586: }
5587: return $slotinfo{$which};
5588: }
5589: # ------------------------------------------------- Update symbolic store links
5590:
5591: sub symblist {
5592: my ($mapname,%newhash)=@_;
5593: $mapname=&deversion(&declutter($mapname));
5594: my %hash;
5595: if (($env{'request.course.fn'}) && (%newhash)) {
5596: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5597: &GDBM_WRCREAT(),0640)) {
5598: foreach my $url (keys %newhash) {
5599: next if ($url eq 'last_known'
5600: && $env{'form.no_update_last_known'});
5601: $hash{declutter($url)}=&encode_symb($mapname,
5602: $newhash{$url}->[1],
5603: $newhash{$url}->[0]);
5604: }
5605: if (untie(%hash)) {
5606: return 'ok';
5607: }
5608: }
5609: }
5610: return 'error';
5611: }
5612:
5613: # --------------------------------------------------------------- Verify a symb
5614:
5615: sub symbverify {
5616: my ($symb,$thisurl)=@_;
5617: my $thisfn=$thisurl;
5618: # wrapper not part of symbs
5619: $thisfn=~s/^\/adm\/wrapper//;
5620: $thisfn=~s/^\/adm\/coursedocs\/showdoc\///;
5621: $thisfn=&declutter($thisfn);
5622: # direct jump to resource in page or to a sequence - will construct own symbs
5623: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
5624: # check URL part
5625: my ($map,$resid,$url)=&decode_symb($symb);
5626:
5627: unless ($url eq $thisfn) { return 0; }
5628:
5629: $symb=&symbclean($symb);
5630: $thisurl=&deversion($thisurl);
5631: $thisfn=&deversion($thisfn);
5632:
5633: my %bighash;
5634: my $okay=0;
5635:
5636: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5637: &GDBM_READER(),0640)) {
5638: my $ids=$bighash{'ids_'.&clutter($thisurl)};
5639: unless ($ids) {
5640: $ids=$bighash{'ids_/'.$thisurl};
5641: }
5642: if ($ids) {
5643: # ------------------------------------------------------------------- Has ID(s)
5644: foreach (split(/\,/,$ids)) {
5645: my ($mapid,$resid)=split(/\./,$_);
5646: if (
5647: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
5648: eq $symb) {
5649: if (($env{'request.role.adv'}) ||
5650: $bighash{'encrypted_'.$_} eq $env{'request.enc'}) {
5651: $okay=1;
5652: }
5653: }
5654: }
5655: }
5656: untie(%bighash);
5657: }
5658: return $okay;
5659: }
5660:
5661: # --------------------------------------------------------------- Clean-up symb
5662:
5663: sub symbclean {
5664: my $symb=shift;
5665: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5666: # remove version from map
5667: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
5668:
5669: # remove version from URL
5670: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
5671:
5672: # remove wrapper
5673:
5674: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
5675: $symb=~s/(\_\_\_\d+\_\_\_)adm\/coursedocs\/showdoc\/(res\/)*/$1/;
5676: return $symb;
5677: }
5678:
5679: # ---------------------------------------------- Split symb to find map and url
5680:
5681: sub encode_symb {
5682: my ($map,$resid,$url)=@_;
5683: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
5684: }
5685:
5686: sub decode_symb {
5687: my $symb=shift;
5688: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
5689: my ($map,$resid,$url)=split(/___/,$symb);
5690: return (&fixversion($map),$resid,&fixversion($url));
5691: }
5692:
5693: sub fixversion {
5694: my $fn=shift;
5695: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
5696: my %bighash;
5697: my $uri=&clutter($fn);
5698: my $key=$env{'request.course.id'}.'_'.$uri;
5699: # is this cached?
5700: my ($result,$cached)=&is_cached_new('courseresversion',$key);
5701: if (defined($cached)) { return $result; }
5702: # unfortunately not cached, or expired
5703: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5704: &GDBM_READER(),0640)) {
5705: if ($bighash{'version_'.$uri}) {
5706: my $version=$bighash{'version_'.$uri};
5707: unless (($version eq 'mostrecent') ||
5708: ($version==&getversion($uri))) {
5709: $uri=~s/\.(\w+)$/\.$version\.$1/;
5710: }
5711: }
5712: untie %bighash;
5713: }
5714: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
5715: }
5716:
5717: sub deversion {
5718: my $url=shift;
5719: $url=~s/\.\d+\.(\w+)$/\.$1/;
5720: return $url;
5721: }
5722:
5723: # ------------------------------------------------------ Return symb list entry
5724:
5725: sub symbread {
5726: my ($thisfn,$donotrecurse)=@_;
5727: my $cache_str='request.symbread.cached.'.$thisfn;
5728: if (defined($env{$cache_str})) { return $env{$cache_str}; }
5729: # no filename provided? try from environment
5730: unless ($thisfn) {
5731: if ($env{'request.symb'}) {
5732: return $env{$cache_str}=&symbclean($env{'request.symb'});
5733: }
5734: $thisfn=$env{'request.filename'};
5735: }
5736: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5737: # is that filename actually a symb? Verify, clean, and return
5738: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
5739: if (&symbverify($thisfn,$1)) {
5740: return $env{$cache_str}=&symbclean($thisfn);
5741: }
5742: }
5743: $thisfn=declutter($thisfn);
5744: my %hash;
5745: my %bighash;
5746: my $syval='';
5747: if (($env{'request.course.fn'}) && ($thisfn)) {
5748: my $targetfn = $thisfn;
5749: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
5750: $targetfn = 'adm/wrapper/'.$thisfn;
5751: }
5752: if ($targetfn =~ m|^adm/wrapper/(ext/.*)|) {
5753: $targetfn=$1;
5754: }
5755: if (tie(%hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
5756: &GDBM_READER(),0640)) {
5757: $syval=$hash{$targetfn};
5758: untie(%hash);
5759: }
5760: # ---------------------------------------------------------- There was an entry
5761: if ($syval) {
5762: #unless ($syval=~/\_\d+$/) {
5763: #unless ($env{'form.request.prefix'}=~/\.(\d+)\_$/) {
5764: #&appenv('request.ambiguous' => $thisfn);
5765: #return $env{$cache_str}='';
5766: #}
5767: #$syval.=$1;
5768: #}
5769: } else {
5770: # ------------------------------------------------------- Was not in symb table
5771: if (tie(%bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
5772: &GDBM_READER(),0640)) {
5773: # ---------------------------------------------- Get ID(s) for current resource
5774: my $ids=$bighash{'ids_'.&clutter($thisfn)};
5775: unless ($ids) {
5776: $ids=$bighash{'ids_/'.$thisfn};
5777: }
5778: unless ($ids) {
5779: # alias?
5780: $ids=$bighash{'mapalias_'.$thisfn};
5781: }
5782: if ($ids) {
5783: # ------------------------------------------------------------------- Has ID(s)
5784: my @possibilities=split(/\,/,$ids);
5785: if ($#possibilities==0) {
5786: # ----------------------------------------------- There is only one possibility
5787: my ($mapid,$resid)=split(/\./,$ids);
5788: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5789: $resid,$thisfn);
5790: } elsif (!$donotrecurse) {
5791: # ------------------------------------------ There is more than one possibility
5792: my $realpossible=0;
5793: foreach (@possibilities) {
5794: my $file=$bighash{'src_'.$_};
5795: if (&allowed('bre',$file)) {
5796: my ($mapid,$resid)=split(/\./,$_);
5797: if ($bighash{'map_type_'.$mapid} ne 'page') {
5798: $realpossible++;
5799: $syval=&encode_symb($bighash{'map_id_'.$mapid},
5800: $resid,$thisfn);
5801: }
5802: }
5803: }
5804: if ($realpossible!=1) { $syval=''; }
5805: } else {
5806: $syval='';
5807: }
5808: }
5809: untie(%bighash)
5810: }
5811: }
5812: if ($syval) {
5813: return $env{$cache_str}=$syval;
5814: }
5815: }
5816: &appenv('request.ambiguous' => $thisfn);
5817: return $env{$cache_str}='';
5818: }
5819:
5820: # ---------------------------------------------------------- Return random seed
5821:
5822: sub numval {
5823: my $txt=shift;
5824: $txt=~tr/A-J/0-9/;
5825: $txt=~tr/a-j/0-9/;
5826: $txt=~tr/K-T/0-9/;
5827: $txt=~tr/k-t/0-9/;
5828: $txt=~tr/U-Z/0-5/;
5829: $txt=~tr/u-z/0-5/;
5830: $txt=~s/\D//g;
5831: if ($_64bit) { if ($txt > 2**32) { return -1; } }
5832: return int($txt);
5833: }
5834:
5835: sub numval2 {
5836: my $txt=shift;
5837: $txt=~tr/A-J/0-9/;
5838: $txt=~tr/a-j/0-9/;
5839: $txt=~tr/K-T/0-9/;
5840: $txt=~tr/k-t/0-9/;
5841: $txt=~tr/U-Z/0-5/;
5842: $txt=~tr/u-z/0-5/;
5843: $txt=~s/\D//g;
5844: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5845: my $total;
5846: foreach my $val (@txts) { $total+=$val; }
5847: if ($_64bit) { if ($total > 2**32) { return -1; } }
5848: return int($total);
5849: }
5850:
5851: sub numval3 {
5852: use integer;
5853: my $txt=shift;
5854: $txt=~tr/A-J/0-9/;
5855: $txt=~tr/a-j/0-9/;
5856: $txt=~tr/K-T/0-9/;
5857: $txt=~tr/k-t/0-9/;
5858: $txt=~tr/U-Z/0-5/;
5859: $txt=~tr/u-z/0-5/;
5860: $txt=~s/\D//g;
5861: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5862: my $total;
5863: foreach my $val (@txts) { $total+=$val; }
5864: if ($_64bit) { $total=(($total<<32)>>32); }
5865: return $total;
5866: }
5867:
5868: sub digest {
5869: my ($data)=@_;
5870: my $digest=&Digest::MD5::md5($data);
5871: my ($a,$b,$c,$d)=unpack("iiii",$digest);
5872: my ($e,$f);
5873: {
5874: use integer;
5875: $e=($a+$b);
5876: $f=($c+$d);
5877: if ($_64bit) {
5878: $e=(($e<<32)>>32);
5879: $f=(($f<<32)>>32);
5880: }
5881: }
5882: if (wantarray) {
5883: return ($e,$f);
5884: } else {
5885: my $g;
5886: {
5887: use integer;
5888: $g=($e+$f);
5889: if ($_64bit) {
5890: $g=(($g<<32)>>32);
5891: }
5892: }
5893: return $g;
5894: }
5895: }
5896:
5897: sub latest_rnd_algorithm_id {
5898: return '64bit5';
5899: }
5900:
5901: sub get_rand_alg {
5902: my ($courseid)=@_;
5903: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5904: if ($courseid) {
5905: return $env{"course.$courseid.rndseed"};
5906: }
5907: return &latest_rnd_algorithm_id();
5908: }
5909:
5910: sub validCODE {
5911: my ($CODE)=@_;
5912: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5913: return 0;
5914: }
5915:
5916: sub getCODE {
5917: if (&validCODE($env{'form.CODE'})) { return $env{'form.CODE'}; }
5918: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
5919: defined($Apache::lonhomework::parsing_a_task) ) &&
5920: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5921: return $Apache::lonhomework::history{'resource.CODE'};
5922: }
5923: return undef;
5924: }
5925:
5926: sub rndseed {
5927: my ($symb,$courseid,$domain,$username)=@_;
5928:
5929: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5930: if (!$symb) {
5931: unless ($symb=$wsymb) { return time; }
5932: }
5933: if (!$courseid) { $courseid=$wcourseid; }
5934: if (!$domain) { $domain=$wdomain; }
5935: if (!$username) { $username=$wusername }
5936: my $which=&get_rand_alg();
5937: if (defined(&getCODE())) {
5938: if ($which eq '64bit5') {
5939: return &rndseed_CODE_64bit5($symb,$courseid,$domain,$username);
5940: } elsif ($which eq '64bit4') {
5941: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5942: } else {
5943: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5944: }
5945: } elsif ($which eq '64bit5') {
5946: return &rndseed_64bit5($symb,$courseid,$domain,$username);
5947: } elsif ($which eq '64bit4') {
5948: return &rndseed_64bit4($symb,$courseid,$domain,$username);
5949: } elsif ($which eq '64bit3') {
5950: return &rndseed_64bit3($symb,$courseid,$domain,$username);
5951: } elsif ($which eq '64bit2') {
5952: return &rndseed_64bit2($symb,$courseid,$domain,$username);
5953: } elsif ($which eq '64bit') {
5954: return &rndseed_64bit($symb,$courseid,$domain,$username);
5955: }
5956: return &rndseed_32bit($symb,$courseid,$domain,$username);
5957: }
5958:
5959: sub rndseed_32bit {
5960: my ($symb,$courseid,$domain,$username)=@_;
5961: {
5962: use integer;
5963: my $symbchck=unpack("%32C*",$symb) << 27;
5964: my $symbseed=numval($symb) << 22;
5965: my $namechck=unpack("%32C*",$username) << 17;
5966: my $nameseed=numval($username) << 12;
5967: my $domainseed=unpack("%32C*",$domain) << 7;
5968: my $courseseed=unpack("%32C*",$courseid);
5969: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
5970: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5971: #&Apache::lonxml::debug("rndseed :$num:$symb");
5972: if ($_64bit) { $num=(($num<<32)>>32); }
5973: return $num;
5974: }
5975: }
5976:
5977: sub rndseed_64bit {
5978: my ($symb,$courseid,$domain,$username)=@_;
5979: {
5980: use integer;
5981: my $symbchck=unpack("%32S*",$symb) << 21;
5982: my $symbseed=numval($symb) << 10;
5983: my $namechck=unpack("%32S*",$username);
5984:
5985: my $nameseed=numval($username) << 21;
5986: my $domainseed=unpack("%32S*",$domain) << 10;
5987: my $courseseed=unpack("%32S*",$courseid);
5988:
5989: my $num1=$symbchck+$symbseed+$namechck;
5990: my $num2=$nameseed+$domainseed+$courseseed;
5991: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5992: #&Apache::lonxml::debug("rndseed :$num:$symb");
5993: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5994: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5995: return "$num1,$num2";
5996: }
5997: }
5998:
5999: sub rndseed_64bit2 {
6000: my ($symb,$courseid,$domain,$username)=@_;
6001: {
6002: use integer;
6003: # strings need to be an even # of cahracters long, it it is odd the
6004: # last characters gets thrown away
6005: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6006: my $symbseed=numval($symb) << 10;
6007: my $namechck=unpack("%32S*",$username.' ');
6008:
6009: my $nameseed=numval($username) << 21;
6010: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6011: my $courseseed=unpack("%32S*",$courseid.' ');
6012:
6013: my $num1=$symbchck+$symbseed+$namechck;
6014: my $num2=$nameseed+$domainseed+$courseseed;
6015: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6016: #&Apache::lonxml::debug("rndseed :$num:$symb");
6017: return "$num1,$num2";
6018: }
6019: }
6020:
6021: sub rndseed_64bit3 {
6022: my ($symb,$courseid,$domain,$username)=@_;
6023: {
6024: use integer;
6025: # strings need to be an even # of cahracters long, it it is odd the
6026: # last characters gets thrown away
6027: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6028: my $symbseed=numval2($symb) << 10;
6029: my $namechck=unpack("%32S*",$username.' ');
6030:
6031: my $nameseed=numval2($username) << 21;
6032: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6033: my $courseseed=unpack("%32S*",$courseid.' ');
6034:
6035: my $num1=$symbchck+$symbseed+$namechck;
6036: my $num2=$nameseed+$domainseed+$courseseed;
6037: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6038: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
6039: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6040:
6041: return "$num1:$num2";
6042: }
6043: }
6044:
6045: sub rndseed_64bit4 {
6046: my ($symb,$courseid,$domain,$username)=@_;
6047: {
6048: use integer;
6049: # strings need to be an even # of cahracters long, it it is odd the
6050: # last characters gets thrown away
6051: my $symbchck=unpack("%32S*",$symb.' ') << 21;
6052: my $symbseed=numval3($symb) << 10;
6053: my $namechck=unpack("%32S*",$username.' ');
6054:
6055: my $nameseed=numval3($username) << 21;
6056: my $domainseed=unpack("%32S*",$domain.' ') << 10;
6057: my $courseseed=unpack("%32S*",$courseid.' ');
6058:
6059: my $num1=$symbchck+$symbseed+$namechck;
6060: my $num2=$nameseed+$domainseed+$courseseed;
6061: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
6062: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
6063: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
6064:
6065: return "$num1:$num2";
6066: }
6067: }
6068:
6069: sub rndseed_64bit5 {
6070: my ($symb,$courseid,$domain,$username)=@_;
6071: my ($num1,$num2)=&digest("$symb,$courseid,$domain,$username");
6072: return "$num1:$num2";
6073: }
6074:
6075: sub rndseed_CODE_64bit {
6076: my ($symb,$courseid,$domain,$username)=@_;
6077: {
6078: use integer;
6079: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6080: my $symbseed=numval2($symb);
6081: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6082: my $CODEseed=numval(&getCODE());
6083: my $courseseed=unpack("%32S*",$courseid.' ');
6084: my $num1=$symbseed+$CODEchck;
6085: my $num2=$CODEseed+$courseseed+$symbchck;
6086: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6087: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
6088: if ($_64bit) { $num1=(($num1<<32)>>32); }
6089: if ($_64bit) { $num2=(($num2<<32)>>32); }
6090: return "$num1:$num2";
6091: }
6092: }
6093:
6094: sub rndseed_CODE_64bit4 {
6095: my ($symb,$courseid,$domain,$username)=@_;
6096: {
6097: use integer;
6098: my $symbchck=unpack("%32S*",$symb.' ') << 16;
6099: my $symbseed=numval3($symb);
6100: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
6101: my $CODEseed=numval3(&getCODE());
6102: my $courseseed=unpack("%32S*",$courseid.' ');
6103: my $num1=$symbseed+$CODEchck;
6104: my $num2=$CODEseed+$courseseed+$symbchck;
6105: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
6106: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
6107: if ($_64bit) { $num1=(($num1<<32)>>32); }
6108: if ($_64bit) { $num2=(($num2<<32)>>32); }
6109: return "$num1:$num2";
6110: }
6111: }
6112:
6113: sub rndseed_CODE_64bit5 {
6114: my ($symb,$courseid,$domain,$username)=@_;
6115: my $code = &getCODE();
6116: my ($num1,$num2)=&digest("$symb,$courseid,$code");
6117: return "$num1:$num2";
6118: }
6119:
6120: sub setup_random_from_rndseed {
6121: my ($rndseed)=@_;
6122: if ($rndseed =~/([,:])/) {
6123: my ($num1,$num2)=split(/[,:]/,$rndseed);
6124: &Math::Random::random_set_seed(abs($num1),abs($num2));
6125: } else {
6126: &Math::Random::random_set_seed_from_phrase($rndseed);
6127: }
6128: }
6129:
6130: sub latest_receipt_algorithm_id {
6131: return 'receipt2';
6132: }
6133:
6134: sub recunique {
6135: my $fucourseid=shift;
6136: my $unique;
6137: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6138: $unique=$env{"course.$fucourseid.internal.encseed"};
6139: } else {
6140: $unique=$perlvar{'lonReceipt'};
6141: }
6142: return unpack("%32C*",$unique);
6143: }
6144:
6145: sub recprefix {
6146: my $fucourseid=shift;
6147: my $prefix;
6148: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2') {
6149: $prefix=$env{"course.$fucourseid.internal.encpref"};
6150: } else {
6151: $prefix=$perlvar{'lonHostID'};
6152: }
6153: return unpack("%32C*",$prefix);
6154: }
6155:
6156: sub ireceipt {
6157: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
6158: my $cuname=unpack("%32C*",$funame);
6159: my $cudom=unpack("%32C*",$fudom);
6160: my $cucourseid=unpack("%32C*",$fucourseid);
6161: my $cusymb=unpack("%32C*",$fusymb);
6162: my $cunique=&recunique($fucourseid);
6163: my $cpart=unpack("%32S*",$part);
6164: my $return =&recprefix($fucourseid).'-';
6165: if ($env{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
6166: $env{'request.state'} eq 'construct') {
6167: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
6168: " and ".($cpart%$cudom));
6169:
6170: $return.= ($cunique%$cuname+
6171: $cunique%$cudom+
6172: $cusymb%$cuname+
6173: $cusymb%$cudom+
6174: $cucourseid%$cuname+
6175: $cucourseid%$cudom+
6176: $cpart%$cuname+
6177: $cpart%$cudom);
6178: } else {
6179: $return.= ($cunique%$cuname+
6180: $cunique%$cudom+
6181: $cusymb%$cuname+
6182: $cusymb%$cudom+
6183: $cucourseid%$cuname+
6184: $cucourseid%$cudom);
6185: }
6186: return $return;
6187: }
6188:
6189: sub receipt {
6190: my ($part)=@_;
6191: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
6192: return &ireceipt($name,$domain,$courseid,$symb,$part);
6193: }
6194:
6195: # ------------------------------------------------------------ Serves up a file
6196: # returns either the contents of the file or
6197: # -1 if the file doesn't exist
6198: #
6199: # if the target is a file that was uploaded via DOCS,
6200: # a check will be made to see if a current copy exists on the local server,
6201: # if it does this will be served, otherwise a copy will be retrieved from
6202: # the home server for the course and stored in /home/httpd/html/userfiles on
6203: # the local server.
6204:
6205: sub getfile {
6206: my ($file) = @_;
6207: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6208: &repcopy($file);
6209: return &readfile($file);
6210: }
6211:
6212: sub repcopy_userfile {
6213: my ($file)=@_;
6214: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
6215: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
6216: my ($cdom,$cnum,$filename) =
6217: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
6218: my ($info,$rtncode);
6219: my $uri="/uploaded/$cdom/$cnum/$filename";
6220: if (-e "$file") {
6221: my @fileinfo = stat($file);
6222: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
6223: if ($lwpresp ne 'ok') {
6224: if ($rtncode eq '404') {
6225: unlink($file);
6226: }
6227: #my $ua=new LWP::UserAgent;
6228: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6229: #my $response=$ua->request($request);
6230: #if ($response->is_success()) {
6231: # return $response->content;
6232: # } else {
6233: # return -1;
6234: # }
6235: return -1;
6236: }
6237: if ($info < $fileinfo[9]) {
6238: return 'ok';
6239: }
6240: $info = '';
6241: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6242: if ($lwpresp ne 'ok') {
6243: return -1;
6244: }
6245: } else {
6246: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
6247: if ($lwpresp ne 'ok') {
6248: my $ua=new LWP::UserAgent;
6249: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
6250: my $response=$ua->request($request);
6251: if ($response->is_success()) {
6252: $info=$response->content;
6253: } else {
6254: return -1;
6255: }
6256: }
6257: my @parts = ($cdom,$cnum);
6258: if ($filename =~ m|^(.+)/[^/]+$|) {
6259: push @parts, split(/\//,$1);
6260: }
6261: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
6262: foreach my $part (@parts) {
6263: $path .= '/'.$part;
6264: if (!-e $path) {
6265: mkdir($path,0770);
6266: }
6267: }
6268: }
6269: open(FILE,">$file");
6270: print FILE $info;
6271: close(FILE);
6272: return 'ok';
6273: }
6274:
6275: sub tokenwrapper {
6276: my $uri=shift;
6277: $uri=~s|^http\://([^/]+)||;
6278: $uri=~s|^/||;
6279: $env{'user.environment'}=~/\/([^\/]+)\.id/;
6280: my $token=$1;
6281: my (undef,$udom,$uname,$file)=split('/',$uri,4);
6282: if ($udom && $uname && $file) {
6283: $file=~s|(\?\.*)*$||;
6284: &appenv("userfile.$udom/$uname/$file" => $env{'request.course.id'});
6285: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
6286: (($uri=~/\?/)?'&':'?').'token='.$token.
6287: '&tokenissued='.$perlvar{'lonHostID'};
6288: } else {
6289: return '/adm/notfound.html';
6290: }
6291: }
6292:
6293: sub getuploaded {
6294: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
6295: $uri=~s/^\///;
6296: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
6297: my $ua=new LWP::UserAgent;
6298: my $request=new HTTP::Request($reqtype,$uri);
6299: my $response=$ua->request($request);
6300: $$rtncode = $response->code;
6301: if (! $response->is_success()) {
6302: return 'failed';
6303: }
6304: if ($reqtype eq 'HEAD') {
6305: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
6306: } elsif ($reqtype eq 'GET') {
6307: $$info = $response->content;
6308: }
6309: return 'ok';
6310: }
6311:
6312: sub readfile {
6313: my $file = shift;
6314: if ( (! -e $file ) || ($file eq '') ) { return -1; };
6315: my $fh;
6316: open($fh,"<$file");
6317: my $a='';
6318: while (<$fh>) { $a .=$_; }
6319: return $a;
6320: }
6321:
6322: sub filelocation {
6323: my ($dir,$file) = @_;
6324: my $location;
6325: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
6326:
6327: if ($file =~ m-^/adm/-) {
6328: $file=~s-^/adm/wrapper/-/-;
6329: $file=~s-^/adm/coursedocs/showdoc/-/-;
6330: }
6331: if ($file=~m:^/~:) { # is a contruction space reference
6332: $location = $file;
6333: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
6334: } elsif ($file=~m:^/home/[^/]*/public_html/:) {
6335: # is a correct contruction space reference
6336: $location = $file;
6337: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
6338: my ($udom,$uname,$filename)=
6339: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
6340: my $home=&homeserver($uname,$udom);
6341: my $is_me=0;
6342: my @ids=¤t_machine_ids();
6343: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
6344: if ($is_me) {
6345: $location=&Apache::loncommon::propath($udom,$uname).
6346: '/userfiles/'.$filename;
6347: } else {
6348: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
6349: $udom.'/'.$uname.'/'.$filename;
6350: }
6351: } else {
6352: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6353: $file=~s:^/res/:/:;
6354: if ( !( $file =~ m:^/:) ) {
6355: $location = $dir. '/'.$file;
6356: } else {
6357: $location = '/home/httpd/html/res'.$file;
6358: }
6359: }
6360: $location=~s://+:/:g; # remove duplicate /
6361: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
6362: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
6363: return $location;
6364: }
6365:
6366: sub hreflocation {
6367: my ($dir,$file)=@_;
6368: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
6369: $file=filelocation($dir,$file);
6370: } elsif ($file=~m-^/adm/-) {
6371: $file=~s-^/adm/wrapper/-/-;
6372: $file=~s-^/adm/coursedocs/showdoc/-/-;
6373: }
6374: if ($file=~m-^\Q$perlvar{'lonDocRoot'}\E-) {
6375: $file=~s-^\Q$perlvar{'lonDocRoot'}\E--;
6376: } elsif ($file=~m-/home/(\w+)/public_html/-) {
6377: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
6378: } elsif ($file=~m-^\Q$perlvar{'lonUsersDir'}\E-) {
6379: $file=~s-^/home/httpd/lonUsers/([^/]*)/./././([^/]*)/userfiles/
6380: -/uploaded/$1/$2/-x;
6381: }
6382: return $file;
6383: }
6384:
6385: sub current_machine_domains {
6386: my $hostname=$hostname{$perlvar{'lonHostID'}};
6387: my @domains;
6388: while( my($id, $name) = each(%hostname)) {
6389: # &logthis("-$id-$name-$hostname-");
6390: if ($hostname eq $name) {
6391: push(@domains,$hostdom{$id});
6392: }
6393: }
6394: return @domains;
6395: }
6396:
6397: sub current_machine_ids {
6398: my $hostname=$hostname{$perlvar{'lonHostID'}};
6399: my @ids;
6400: while( my($id, $name) = each(%hostname)) {
6401: # &logthis("-$id-$name-$hostname-");
6402: if ($hostname eq $name) {
6403: push(@ids,$id);
6404: }
6405: }
6406: return @ids;
6407: }
6408:
6409: # ------------------------------------------------------------- Declutters URLs
6410:
6411: sub declutter {
6412: my $thisfn=shift;
6413: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
6414: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
6415: $thisfn=~s/^\///;
6416: $thisfn=~s|^adm/wrapper/||;
6417: $thisfn=~s|^adm/coursedocs/showdoc/||;
6418: $thisfn=~s/^res\///;
6419: $thisfn=~s/\?.+$//;
6420: return $thisfn;
6421: }
6422:
6423: # ------------------------------------------------------------- Clutter up URLs
6424:
6425: sub clutter {
6426: my $thisfn='/'.&declutter(shift);
6427: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
6428: $thisfn='/res'.$thisfn;
6429: }
6430: if ($thisfn !~m|/adm|) {
6431: if ($thisfn =~ m|/ext/|) {
6432: $thisfn='/adm/wrapper'.$thisfn;
6433: } else {
6434: my ($ext) = ($thisfn =~ /\.(\w+)$/);
6435: my $embstyle=&Apache::loncommon::fileembstyle($ext);
6436: if ($embstyle eq 'ssi'
6437: || ($embstyle eq 'hdn')
6438: || ($embstyle eq 'rat')
6439: || ($embstyle eq 'prv')
6440: || ($embstyle eq 'ign')) {
6441: #do nothing with these
6442: } elsif (($embstyle eq 'img')
6443: || ($embstyle eq 'emb')
6444: || ($embstyle eq 'wrp')) {
6445: $thisfn='/adm/wrapper'.$thisfn;
6446: } elsif ($embstyle eq 'unk'
6447: && $thisfn!~/\.(sequence|page)$/) {
6448: $thisfn='/adm/coursedocs/showdoc'.$thisfn;
6449: } else {
6450: # &logthis("Got a blank emb style");
6451: }
6452: }
6453: }
6454: return $thisfn;
6455: }
6456:
6457: sub freeze_escape {
6458: my ($value)=@_;
6459: if (ref($value)) {
6460: $value=&nfreeze($value);
6461: return '__FROZEN__'.&escape($value);
6462: }
6463: return &escape($value);
6464: }
6465:
6466: # -------------------------------------------------------- Escape Special Chars
6467:
6468: sub escape {
6469: my $str=shift;
6470: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
6471: return $str;
6472: }
6473:
6474: # ----------------------------------------------------- Un-Escape Special Chars
6475:
6476: sub unescape {
6477: my $str=shift;
6478: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
6479: return $str;
6480: }
6481:
6482: sub thaw_unescape {
6483: my ($value)=@_;
6484: if ($value =~ /^__FROZEN__/) {
6485: substr($value,0,10,undef);
6486: $value=&unescape($value);
6487: return &thaw($value);
6488: }
6489: return &unescape($value);
6490: }
6491:
6492: sub correct_line_ends {
6493: my ($result)=@_;
6494: $$result =~s/\r\n/\n/mg;
6495: $$result =~s/\r/\n/mg;
6496: }
6497: # ================================================================ Main Program
6498:
6499: sub goodbye {
6500: &logthis("Starting Shut down");
6501: #not converted to using infrastruture and probably shouldn't be
6502: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
6503: #converted
6504: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
6505: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
6506: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
6507: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
6508: #1.1 only
6509: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
6510: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
6511: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
6512: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
6513: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
6514: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
6515: &logthis(sprintf("%-20s is %s",'hits',$hits));
6516: &flushcourselogs();
6517: &logthis("Shutting down");
6518: return DONE;
6519: }
6520:
6521: BEGIN {
6522: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
6523: unless ($readit) {
6524: {
6525: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
6526: open(my $config,"</etc/httpd/conf/loncapa.conf");
6527:
6528: while (my $configline=<$config>) {
6529: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
6530: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6531: chomp($varvalue);
6532: $perlvar{$varname}=$varvalue;
6533: }
6534: }
6535: close($config);
6536: }
6537: {
6538: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
6539:
6540: while (my $configline=<$config>) {
6541: if ($configline =~ /^[^\#]*PerlSetVar/) {
6542: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
6543: chomp($varvalue);
6544: $perlvar{$varname}=$varvalue;
6545: }
6546: }
6547: close($config);
6548: }
6549:
6550: # ------------------------------------------------------------ Read domain file
6551: {
6552: %domaindescription = ();
6553: %domain_auth_def = ();
6554: %domain_auth_arg_def = ();
6555: my $fh;
6556: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
6557: while (<$fh>) {
6558: next if (/^(\#|\s*$)/);
6559: # next if /^\#/;
6560: chomp;
6561: my ($domain, $domain_description, $def_auth, $def_auth_arg,
6562: $def_lang, $city, $longi, $lati, $primary) = split(/:/,$_);
6563: $domain_auth_def{$domain}=$def_auth;
6564: $domain_auth_arg_def{$domain}=$def_auth_arg;
6565: $domaindescription{$domain}=$domain_description;
6566: $domain_lang_def{$domain}=$def_lang;
6567: $domain_city{$domain}=$city;
6568: $domain_longi{$domain}=$longi;
6569: $domain_lati{$domain}=$lati;
6570: $domain_primary{$domain}=$primary;
6571:
6572: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
6573: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
6574: }
6575: }
6576: close ($fh);
6577: }
6578:
6579:
6580: # ------------------------------------------------------------- Read hosts file
6581: {
6582: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
6583:
6584: while (my $configline=<$config>) {
6585: next if ($configline =~ /^(\#|\s*$)/);
6586: chomp($configline);
6587: my ($id,$domain,$role,$name)=split(/:/,$configline);
6588: $name=~s/\s//g;
6589: if ($id && $domain && $role && $name) {
6590: $hostname{$id}=$name;
6591: $hostdom{$id}=$domain;
6592: if ($role eq 'library') { $libserv{$id}=$name; }
6593: }
6594: }
6595: close($config);
6596: # FIXME: dev server don't want this, production servers _do_ want this
6597: #&get_iphost();
6598: }
6599:
6600: sub get_iphost {
6601: if (%iphost) { return %iphost; }
6602: my %name_to_ip;
6603: foreach my $id (keys(%hostname)) {
6604: my $name=$hostname{$id};
6605: my $ip;
6606: if (!exists($name_to_ip{$name})) {
6607: $ip = gethostbyname($name);
6608: if (!$ip || length($ip) ne 4) {
6609: &logthis("Skipping host $id name $name no IP found\n");
6610: next;
6611: }
6612: $ip=inet_ntoa($ip);
6613: $name_to_ip{$name} = $ip;
6614: } else {
6615: $ip = $name_to_ip{$name};
6616: }
6617: push(@{$iphost{$ip}},$id);
6618: }
6619: return %iphost;
6620: }
6621:
6622: # ------------------------------------------------------ Read spare server file
6623: {
6624: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
6625:
6626: while (my $configline=<$config>) {
6627: chomp($configline);
6628: if ($configline) {
6629: $spareid{$configline}=1;
6630: }
6631: }
6632: close($config);
6633: }
6634: # ------------------------------------------------------------ Read permissions
6635: {
6636: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
6637:
6638: while (my $configline=<$config>) {
6639: chomp($configline);
6640: if ($configline) {
6641: my ($role,$perm)=split(/ /,$configline);
6642: if ($perm ne '') { $pr{$role}=$perm; }
6643: }
6644: }
6645: close($config);
6646: }
6647:
6648: # -------------------------------------------- Read plain texts for permissions
6649: {
6650: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
6651:
6652: while (my $configline=<$config>) {
6653: chomp($configline);
6654: if ($configline) {
6655: my ($short,$plain)=split(/:/,$configline);
6656: if ($plain ne '') { $prp{$short}=$plain; }
6657: }
6658: }
6659: close($config);
6660: }
6661:
6662: # ---------------------------------------------------------- Read package table
6663: {
6664: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
6665:
6666: while (my $configline=<$config>) {
6667: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
6668: chomp($configline);
6669: my ($short,$plain)=split(/:/,$configline);
6670: my ($pack,$name)=split(/\&/,$short);
6671: if ($plain ne '') {
6672: $packagetab{$pack.'&'.$name.'&name'}=$name;
6673: $packagetab{$short}=$plain;
6674: }
6675: }
6676: close($config);
6677: }
6678:
6679: # ------------- set up temporary directory
6680: {
6681: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
6682:
6683: }
6684:
6685: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
6686:
6687: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
6688: $dumpcount=0;
6689:
6690: &logtouch();
6691: &logthis('<font color="yellow">INFO: Read configuration</font>');
6692: $readit=1;
6693: {
6694: use integer;
6695: my $test=(2**32)+1;
6696: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
6697: &logthis(" Detected 64bit platform ($_64bit)");
6698: }
6699: }
6700: }
6701:
6702: 1;
6703: __END__
6704:
6705: =pod
6706:
6707: =head1 NAME
6708:
6709: Apache::lonnet - Subroutines to ask questions about things in the network.
6710:
6711: =head1 SYNOPSIS
6712:
6713: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
6714:
6715: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
6716:
6717: Common parameters:
6718:
6719: =over 4
6720:
6721: =item *
6722:
6723: $uname : an internal username (if $cname expecting a course Id specifically)
6724:
6725: =item *
6726:
6727: $udom : a domain (if $cdom expecting a course's domain specifically)
6728:
6729: =item *
6730:
6731: $symb : a resource instance identifier
6732:
6733: =item *
6734:
6735: $namespace : the name of a .db file that contains the data needed or
6736: being set.
6737:
6738: =back
6739:
6740: =head1 OVERVIEW
6741:
6742: lonnet provides subroutines which interact with the
6743: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
6744: about classes, users, and resources.
6745:
6746: For many of these objects you can also use this to store data about
6747: them or modify them in various ways.
6748:
6749: =head2 Symbs
6750:
6751: To identify a specific instance of a resource, LON-CAPA uses symbols
6752: or "symbs"X<symb>. These identifiers are built from the URL of the
6753: map, the resource number of the resource in the map, and the URL of
6754: the resource itself. The latter is somewhat redundant, but might help
6755: if maps change.
6756:
6757: An example is
6758:
6759: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
6760:
6761: The respective map entry is
6762:
6763: <resource id="19" src="/res/msu/korte/tests/part12.problem"
6764: title="Problem 2">
6765: </resource>
6766:
6767: Symbs are used by the random number generator, as well as to store and
6768: restore data specific to a certain instance of for example a problem.
6769:
6770: =head2 Storing And Retrieving Data
6771:
6772: X<store()>X<cstore()>X<restore()>Three of the most important functions
6773: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
6774: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
6775: is is the non-critical message twin of cstore. These functions are for
6776: handlers to store a perl hash to a user's permanent data space in an
6777: easy manner, and to retrieve it again on another call. It is expected
6778: that a handler would use this once at the beginning to retrieve data,
6779: and then again once at the end to send only the new data back.
6780:
6781: The data is stored in the user's data directory on the user's
6782: homeserver under the ID of the course.
6783:
6784: The hash that is returned by restore will have all of the previous
6785: value for all of the elements of the hash.
6786:
6787: Example:
6788:
6789: #creating a hash
6790: my %hash;
6791: $hash{'foo'}='bar';
6792:
6793: #storing it
6794: &Apache::lonnet::cstore(\%hash);
6795:
6796: #changing a value
6797: $hash{'foo'}='notbar';
6798:
6799: #adding a new value
6800: $hash{'bar'}='foo';
6801: &Apache::lonnet::cstore(\%hash);
6802:
6803: #retrieving the hash
6804: my %history=&Apache::lonnet::restore();
6805:
6806: #print the hash
6807: foreach my $key (sort(keys(%history))) {
6808: print("\%history{$key} = $history{$key}");
6809: }
6810:
6811: Will print out:
6812:
6813: %history{1:foo} = bar
6814: %history{1:keys} = foo:timestamp
6815: %history{1:timestamp} = 990455579
6816: %history{2:bar} = foo
6817: %history{2:foo} = notbar
6818: %history{2:keys} = foo:bar:timestamp
6819: %history{2:timestamp} = 990455580
6820: %history{bar} = foo
6821: %history{foo} = notbar
6822: %history{timestamp} = 990455580
6823: %history{version} = 2
6824:
6825: Note that the special hash entries C<keys>, C<version> and
6826: C<timestamp> were added to the hash. C<version> will be equal to the
6827: total number of versions of the data that have been stored. The
6828: C<timestamp> attribute will be the UNIX time the hash was
6829: stored. C<keys> is available in every historical section to list which
6830: keys were added or changed at a specific historical revision of a
6831: hash.
6832:
6833: B<Warning>: do not store the hash that restore returns directly. This
6834: will cause a mess since it will restore the historical keys as if the
6835: were new keys. I.E. 1:foo will become 1:1:foo etc.
6836:
6837: Calling convention:
6838:
6839: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
6840: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
6841:
6842: For more detailed information, see lonnet specific documentation.
6843:
6844: =head1 RETURN MESSAGES
6845:
6846: =over 4
6847:
6848: =item * B<con_lost>: unable to contact remote host
6849:
6850: =item * B<con_delayed>: unable to contact remote host, message will be delivered
6851: when the connection is brought back up
6852:
6853: =item * B<con_failed>: unable to contact remote host and unable to save message
6854: for later delivery
6855:
6856: =item * B<error:>: an error a occured, a description of the error follows the :
6857:
6858: =item * B<no_such_host>: unable to fund a host associated with the user/domain
6859: that was requested
6860:
6861: =back
6862:
6863: =head1 PUBLIC SUBROUTINES
6864:
6865: =head2 Session Environment Functions
6866:
6867: =over 4
6868:
6869: =item *
6870: X<appenv()>
6871: B<appenv(%hash)>: the value of %hash is written to
6872: the user envirnoment file, and will be restored for each access this
6873: user makes during this session, also modifies the %env for the current
6874: process
6875:
6876: =item *
6877: X<delenv()>
6878: B<delenv($regexp)>: removes all items from the session
6879: environment file that matches the regular expression in $regexp. The
6880: values are also delted from the current processes %env.
6881:
6882: =back
6883:
6884: =head2 User Information
6885:
6886: =over 4
6887:
6888: =item *
6889: X<queryauthenticate()>
6890: B<queryauthenticate($uname,$udom)>: try to determine user's current
6891: authentication scheme
6892:
6893: =item *
6894: X<authenticate()>
6895: B<authenticate($uname,$upass,$udom)>: try to
6896: authenticate user from domain's lib servers (first use the current
6897: one). C<$upass> should be the users password.
6898:
6899: =item *
6900: X<homeserver()>
6901: B<homeserver($uname,$udom)>: find the server which has
6902: the user's directory and files (there must be only one), this caches
6903: the answer, and also caches if there is a borken connection.
6904:
6905: =item *
6906: X<idget()>
6907: B<idget($udom,@ids)>: find the usernames behind a list of IDs
6908: (IDs are a unique resource in a domain, there must be only 1 ID per
6909: username, and only 1 username per ID in a specific domain) (returns
6910: hash: id=>name,id=>name)
6911:
6912: =item *
6913: X<idrget()>
6914: B<idrget($udom,@unames)>: find the IDs behind a list of
6915: usernames (returns hash: name=>id,name=>id)
6916:
6917: =item *
6918: X<idput()>
6919: B<idput($udom,%ids)>: store away a list of names and associated IDs
6920:
6921: =item *
6922: X<rolesinit()>
6923: B<rolesinit($udom,$username,$authhost)>: get user privileges
6924:
6925: =item *
6926: X<getsection()>
6927: B<getsection($udom,$uname,$cname)>: finds the section of student in the
6928: course $cname, return section name/number or '' for "not in course"
6929: and '-1' for "no section"
6930:
6931: =item *
6932: X<userenvironment()>
6933: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
6934: passed in @what from the requested user's environment, returns a hash
6935:
6936: =back
6937:
6938: =head2 User Roles
6939:
6940: =over 4
6941:
6942: =item *
6943:
6944: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
6945: actions
6946: F: full access
6947: U,I,K: authentication modes (cxx only)
6948: '': forbidden
6949: 1: user needs to choose course
6950: 2: browse allowed
6951:
6952: =item *
6953:
6954: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
6955: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
6956: and course level
6957:
6958: =item *
6959:
6960: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
6961: explanation of a user role term
6962:
6963: =back
6964:
6965: =head2 User Modification
6966:
6967: =over 4
6968:
6969: =item *
6970:
6971: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
6972: user for the level given by URL. Optional start and end dates (leave empty
6973: string or zero for "no date")
6974:
6975: =item *
6976:
6977: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
6978: change a users, password, possible return values are: ok,
6979: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
6980: refused
6981:
6982: =item *
6983:
6984: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
6985:
6986: =item *
6987:
6988: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
6989: modify user
6990:
6991: =item *
6992:
6993: modifystudent
6994:
6995: modify a students enrollment and identification information.
6996: The course id is resolved based on the current users environment.
6997: This means the envoking user must be a course coordinator or otherwise
6998: associated with a course.
6999:
7000: This call is essentially a wrapper for lonnet::modifyuser and
7001: lonnet::modify_student_enrollment
7002:
7003: Inputs:
7004:
7005: =over 4
7006:
7007: =item B<$udom> Students loncapa domain
7008:
7009: =item B<$uname> Students loncapa login name
7010:
7011: =item B<$uid> Students id/student number
7012:
7013: =item B<$umode> Students authentication mode
7014:
7015: =item B<$upass> Students password
7016:
7017: =item B<$first> Students first name
7018:
7019: =item B<$middle> Students middle name
7020:
7021: =item B<$last> Students last name
7022:
7023: =item B<$gene> Students generation
7024:
7025: =item B<$usec> Students section in course
7026:
7027: =item B<$end> Unix time of the roles expiration
7028:
7029: =item B<$start> Unix time of the roles start date
7030:
7031: =item B<$forceid> If defined, allow $uid to be changed
7032:
7033: =item B<$desiredhome> server to use as home server for student
7034:
7035: =back
7036:
7037: =item *
7038:
7039: modify_student_enrollment
7040:
7041: Change a students enrollment status in a class. The environment variable
7042: 'role.request.course' must be defined for this function to proceed.
7043:
7044: Inputs:
7045:
7046: =over 4
7047:
7048: =item $udom, students domain
7049:
7050: =item $uname, students name
7051:
7052: =item $uid, students user id
7053:
7054: =item $first, students first name
7055:
7056: =item $middle
7057:
7058: =item $last
7059:
7060: =item $gene
7061:
7062: =item $usec
7063:
7064: =item $end
7065:
7066: =item $start
7067:
7068: =back
7069:
7070:
7071: =item *
7072:
7073: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
7074: custom role; give a custom role to a user for the level given by URL. Specify
7075: name and domain of role author, and role name
7076:
7077: =item *
7078:
7079: revokerole($udom,$uname,$url,$role) : revoke a role for url
7080:
7081: =item *
7082:
7083: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
7084:
7085: =back
7086:
7087: =head2 Course Infomation
7088:
7089: =over 4
7090:
7091: =item *
7092:
7093: coursedescription($courseid) : returns a hash of information about the
7094: specified course id, including all environment settings for the
7095: course, the description of the course will be in the hash under the
7096: key 'description'
7097:
7098: =item *
7099:
7100: resdata($name,$domain,$type,@which) : request for current parameter
7101: setting for a specific $type, where $type is either 'course' or 'user',
7102: @what should be a list of parameters to ask about. This routine caches
7103: answers for 5 minutes.
7104:
7105: =back
7106:
7107: =head2 Course Modification
7108:
7109: =over 4
7110:
7111: =item *
7112:
7113: writecoursepref($courseid,%prefs) : write preferences (environment
7114: database) for a course
7115:
7116: =item *
7117:
7118: createcourse($udom,$description,$url) : make/modify course
7119:
7120: =back
7121:
7122: =head2 Resource Subroutines
7123:
7124: =over 4
7125:
7126: =item *
7127:
7128: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
7129:
7130: =item *
7131:
7132: repcopy($filename) : subscribes to the requested file, and attempts to
7133: replicate from the owning library server, Might return
7134: 'unavailable', 'not_found', 'forbidden', 'ok', or
7135: 'bad_request', also attempts to grab the metadata for the
7136: resource. Expects the local filesystem pathname
7137: (/home/httpd/html/res/....)
7138:
7139: =back
7140:
7141: =head2 Resource Information
7142:
7143: =over 4
7144:
7145: =item *
7146:
7147: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
7148: a vairety of different possible values, $varname should be a request
7149: string, and the other parameters can be used to specify who and what
7150: one is asking about.
7151:
7152: Possible values for $varname are environment.lastname (or other item
7153: from the envirnment hash), user.name (or someother aspect about the
7154: user), resource.0.maxtries (or some other part and parameter of a
7155: resource)
7156:
7157: =item *
7158:
7159: directcondval($number) : get current value of a condition; reads from a state
7160: string
7161:
7162: =item *
7163:
7164: condval($condidx) : value of condition index based on state
7165:
7166: =item *
7167:
7168: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
7169: resource's metadata, $what should be either a specific key, or either
7170: 'keys' (to get a list of possible keys) or 'packages' to get a list of
7171: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
7172:
7173: this function automatically caches all requests
7174:
7175: =item *
7176:
7177: metadata_query($query,$custom,$customshow) : make a metadata query against the
7178: network of library servers; returns file handle of where SQL and regex results
7179: will be stored for query
7180:
7181: =item *
7182:
7183: symbread($filename) : return symbolic list entry (filename argument optional);
7184: returns the data handle
7185:
7186: =item *
7187:
7188: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
7189: a possible symb for the URL in $thisfn, and if is an encryypted
7190: resource that the user accessed using /enc/ returns a 1 on success, 0
7191: on failure, user must be in a course, as it assumes the existance of
7192: the course initial hash, and uses $env('request.course.id'}
7193:
7194:
7195: =item *
7196:
7197: symbclean($symb) : removes versions numbers from a symb, returns the
7198: cleaned symb
7199:
7200: =item *
7201:
7202: is_on_map($uri) : checks if the $uri is somewhere on the current
7203: course map, user must be in a course for it to work.
7204:
7205: =item *
7206:
7207: numval($salt) : return random seed value (addend for rndseed)
7208:
7209: =item *
7210:
7211: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
7212: a random seed, all arguments are optional, if they aren't sent it uses the
7213: environment to derive them. Note: if symb isn't sent and it can't get one
7214: from &symbread it will use the current time as its return value
7215:
7216: =item *
7217:
7218: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
7219: unfakeable, receipt
7220:
7221: =item *
7222:
7223: receipt() : API to ireceipt working off of env values; given out to users
7224:
7225: =item *
7226:
7227: countacc($url) : count the number of accesses to a given URL
7228:
7229: =item *
7230:
7231: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
7232:
7233: =item *
7234:
7235: checkin($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 $tcrsid)
7236:
7237: =item *
7238:
7239: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
7240:
7241: =item *
7242:
7243: devalidate($symb) : devalidate temporary spreadsheet calculations,
7244: forcing spreadsheet to reevaluate the resource scores next time.
7245:
7246: =back
7247:
7248: =head2 Storing/Retreiving Data
7249:
7250: =over 4
7251:
7252: =item *
7253:
7254: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
7255: for this url; hashref needs to be given and should be a \%hashname; the
7256: remaining args aren't required and if they aren't passed or are '' they will
7257: be derived from the env
7258:
7259: =item *
7260:
7261: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
7262: uses critical subroutine
7263:
7264: =item *
7265:
7266: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
7267: all args are optional
7268:
7269: =item *
7270:
7271: dumpstore($namespace,$udom,$uname,$regexp,$range) :
7272: dumps the complete (or key matching regexp) namespace into a hash
7273: ($udom, $uname, $regexp, $range are optional) for a namespace that is
7274: normally &store()ed into
7275:
7276: $range should be either an integer '100' (give me the first 100
7277: matching records)
7278: or be two integers sperated by a - with no spaces
7279: '30-50' (give me the 30th through the 50th matching
7280: records)
7281:
7282:
7283: =item *
7284:
7285: putstore($namespace,$symb,$version,$storehash,$udomain,$uname) :
7286: replaces a &store() version of data with a replacement set of data
7287: for a particular resource in a namespace passed in the $storehash hash
7288: reference
7289:
7290: =item *
7291:
7292: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
7293: works very similar to store/cstore, but all data is stored in a
7294: temporary location and can be reset using tmpreset, $storehash should
7295: be a hash reference, returns nothing on success
7296:
7297: =item *
7298:
7299: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
7300: similar to restore, but all data is stored in a temporary location and
7301: can be reset using tmpreset. Returns a hash of values on success,
7302: error string otherwise.
7303:
7304: =item *
7305:
7306: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
7307: deltes all keys for $symb form the temporary storage hash.
7308:
7309: =item *
7310:
7311: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7312: reference filled in from namesp ($udom and $uname are optional)
7313:
7314: =item *
7315:
7316: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
7317: namesp ($udom and $uname are optional)
7318:
7319: =item *
7320:
7321: dump($namespace,$udom,$uname,$regexp,$range) :
7322: dumps the complete (or key matching regexp) namespace into a hash
7323: ($udom, $uname, $regexp, $range are optional)
7324:
7325: $range should be either an integer '100' (give me the first 100
7326: matching records)
7327: or be two integers sperated by a - with no spaces
7328: '30-50' (give me the 30th through the 50th matching
7329: records)
7330: =item *
7331:
7332: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
7333: $store can be a scalar, an array reference, or if the amount to be
7334: incremented is > 1, a hash reference.
7335:
7336: ($udom and $uname are optional)
7337:
7338: =item *
7339:
7340: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
7341: ($udom and $uname are optional)
7342:
7343: =item *
7344:
7345: cput($namespace,$storehash,$udom,$uname) : critical put
7346: ($udom and $uname are optional)
7347:
7348: =item *
7349:
7350: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
7351: reference filled in from namesp (encrypts the return communication)
7352: ($udom and $uname are optional)
7353:
7354: =item *
7355:
7356: log($udom,$name,$home,$message) : write to permanent log for user; use
7357: critical subroutine
7358:
7359: =back
7360:
7361: =head2 Network Status Functions
7362:
7363: =over 4
7364:
7365: =item *
7366:
7367: dirlist($uri) : return directory list based on URI
7368:
7369: =item *
7370:
7371: spareserver() : find server with least workload from spare.tab
7372:
7373: =back
7374:
7375: =head2 Apache Request
7376:
7377: =over 4
7378:
7379: =item *
7380:
7381: ssi($url,%hash) : server side include, does a complete request cycle on url to
7382: localhost, posts hash
7383:
7384: =back
7385:
7386: =head2 Data to String to Data
7387:
7388: =over 4
7389:
7390: =item *
7391:
7392: hash2str(%hash) : convert a hash into a string complete with escaping and '='
7393: and '&' separators, supports elements that are arrayrefs and hashrefs
7394:
7395: =item *
7396:
7397: hashref2str($hashref) : convert a hashref into a string complete with
7398: escaping and '=' and '&' separators, supports elements that are
7399: arrayrefs and hashrefs
7400:
7401: =item *
7402:
7403: arrayref2str($arrayref) : convert an arrayref into a string complete
7404: with escaping and '&' separators, supports elements that are arrayrefs
7405: and hashrefs
7406:
7407: =item *
7408:
7409: str2hash($string) : convert string to hash using unescaping and
7410: splitting on '=' and '&', supports elements that are arrayrefs and
7411: hashrefs
7412:
7413: =item *
7414:
7415: str2array($string) : convert string to hash using unescaping and
7416: splitting on '&', supports elements that are arrayrefs and hashrefs
7417:
7418: =back
7419:
7420: =head2 Logging Routines
7421:
7422: =over 4
7423:
7424: These routines allow one to make log messages in the lonnet.log and
7425: lonnet.perm logfiles.
7426:
7427: =item *
7428:
7429: logtouch() : make sure the logfile, lonnet.log, exists
7430:
7431: =item *
7432:
7433: logthis() : append message to the normal lonnet.log file, it gets
7434: preiodically rolled over and deleted.
7435:
7436: =item *
7437:
7438: logperm() : append a permanent message to lonnet.perm.log, this log
7439: file never gets deleted by any automated portion of the system, only
7440: messages of critical importance should go in here.
7441:
7442: =back
7443:
7444: =head2 General File Helper Routines
7445:
7446: =over 4
7447:
7448: =item *
7449:
7450: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
7451: (a) files in /uploaded
7452: (i) If a local copy of the file exists -
7453: compares modification date of local copy with last-modified date for
7454: definitive version stored on home server for course. If local copy is
7455: stale, requests a new version from the home server and stores it.
7456: If the original has been removed from the home server, then local copy
7457: is unlinked.
7458: (ii) If local copy does not exist -
7459: requests the file from the home server and stores it.
7460:
7461: If $caller is 'uploadrep':
7462: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
7463: for request for files originally uploaded via DOCS.
7464: - returns 'ok' if fresh local copy now available, -1 otherwise.
7465:
7466: Otherwise:
7467: This indicates a call from the content generation phase of the request.
7468: - returns the entire contents of the file or -1.
7469:
7470: (b) files in /res
7471: - returns the entire contents of a file or -1;
7472: it properly subscribes to and replicates the file if neccessary.
7473:
7474:
7475: =item *
7476:
7477: stat_file($url) : $url is expected to be a /res/ or /uploaded/ style file
7478: reference
7479:
7480: returns either a stat() list of data about the file or an empty list
7481: if the file doesn't exist or couldn't find out about it (connection
7482: problems or user unknown)
7483:
7484: =item *
7485:
7486: filelocation($dir,$file) : returns file system location of a file
7487: based on URI; meant to be "fairly clean" absolute reference, $dir is a
7488: directory that relative $file lookups are to looked in ($dir of /a/dir
7489: and a file of ../bob will become /a/bob)
7490:
7491: =item *
7492:
7493: hreflocation($dir,$file) : returns file system location or a URL; same as
7494: filelocation except for hrefs
7495:
7496: =item *
7497:
7498: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
7499:
7500: =back
7501:
7502: =head2 Usererfile file routines (/uploaded*)
7503:
7504: =over 4
7505:
7506: =item *
7507:
7508: userfileupload(): main rotine for putting a file in a user or course's
7509: filespace, arguments are,
7510:
7511: formname - required - this is the name of the element in $env where the
7512: filename, and the contents of the file to create/modifed exist
7513: the filename is in $env{'form.'.$formname.'.filename'} and the
7514: contents of the file is located in $env{'form.'.$formname}
7515: coursedoc - if true, store the file in the course of the active role
7516: of the current user
7517: subdir - required - subdirectory to put the file in under ../userfiles/
7518: if undefined, it will be placed in "unknown"
7519:
7520: (This routine calls clean_filename() to remove any dangerous
7521: characters from the filename, and then calls finuserfileupload() to
7522: complete the transaction)
7523:
7524: returns either the url of the uploaded file (/uploaded/....) if successful
7525: and /adm/notfound.html if unsuccessful
7526:
7527: =item *
7528:
7529: clean_filename(): routine for cleaing a filename up for storage in
7530: userfile space, argument is:
7531:
7532: filename - proposed filename
7533:
7534: returns: the new clean filename
7535:
7536: =item *
7537:
7538: finishuserfileupload(): routine that creaes and sends the file to
7539: userspace, probably shouldn't be called directly
7540:
7541: docuname: username or courseid of destination for the file
7542: docudom: domain of user/course of destination for the file
7543: formname: same as for userfileupload()
7544: fname: filename (inculding subdirectories) for the file
7545:
7546: returns either the url of the uploaded file (/uploaded/....) if successful
7547: and /adm/notfound.html if unsuccessful
7548:
7549: =item *
7550:
7551: renameuserfile(): renames an existing userfile to a new name
7552:
7553: Args:
7554: docuname: username or courseid of destination for the file
7555: docudom: domain of user/course of destination for the file
7556: old: current file name (including any subdirs under userfiles)
7557: new: desired file name (including any subdirs under userfiles)
7558:
7559: =item *
7560:
7561: mkdiruserfile(): creates a directory is a userfiles dir
7562:
7563: Args:
7564: docuname: username or courseid of destination for the file
7565: docudom: domain of user/course of destination for the file
7566: dir: dir to create (including any subdirs under userfiles)
7567:
7568: =item *
7569:
7570: removeuserfile(): removes a file that exists in userfiles
7571:
7572: Args:
7573: docuname: username or courseid of destination for the file
7574: docudom: domain of user/course of destination for the file
7575: fname: filname to delete (including any subdirs under userfiles)
7576:
7577: =item *
7578:
7579: removeuploadedurl(): convience function for removeuserfile()
7580:
7581: Args:
7582: url: a full /uploaded/... url to delete
7583:
7584: =back
7585:
7586: =head2 HTTP Helper Routines
7587:
7588: =over 4
7589:
7590: =item *
7591:
7592: escape() : unpack non-word characters into CGI-compatible hex codes
7593:
7594: =item *
7595:
7596: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
7597:
7598: =back
7599:
7600: =head1 PRIVATE SUBROUTINES
7601:
7602: =head2 Underlying communication routines (Shouldn't call)
7603:
7604: =over 4
7605:
7606: =item *
7607:
7608: subreply() : tries to pass a message to lonc, returns con_lost if incapable
7609:
7610: =item *
7611:
7612: reply() : uses subreply to send a message to remote machine, logs all failures
7613:
7614: =item *
7615:
7616: critical() : passes a critical message to another server; if cannot
7617: get through then place message in connection buffer directory and
7618: returns con_delayed, if incapable of saving message, returns
7619: con_failed
7620:
7621: =item *
7622:
7623: reconlonc() : tries to reconnect lonc client processes.
7624:
7625: =back
7626:
7627: =head2 Resource Access Logging
7628:
7629: =over 4
7630:
7631: =item *
7632:
7633: flushcourselogs() : flush (save) buffer logs and access logs
7634:
7635: =item *
7636:
7637: courselog($what) : save message for course in hash
7638:
7639: =item *
7640:
7641: courseacclog($what) : save message for course using &courselog(). Perform
7642: special processing for specific resource types (problems, exams, quizzes, etc).
7643:
7644: =item *
7645:
7646: goodbye() : flush course logs and log shutting down; it is called in srm.conf
7647: as a PerlChildExitHandler
7648:
7649: =back
7650:
7651: =head2 Other
7652:
7653: =over 4
7654:
7655: =item *
7656:
7657: symblist($mapname,%newhash) : update symbolic storage links
7658:
7659: =back
7660:
7661: =cut
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