1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.587.2.3.2.1 2005/02/10 08:16:31 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 %homecache %badServerCache %hostip %iphost %spareid %hostdom
39: %libserv %pr %prp $metacache %packagetab %titlecache %courseresversioncache %resversioncache
40: %courselogs %accesshash %userrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf %courseresdatacache
42: %userresdatacache %getsectioncache %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir $_64bit);
44:
45: use IO::Socket;
46: use GDBM_File;
47: use Apache::Constants qw(:common :http);
48: use HTML::LCParser;
49: use Fcntl qw(:flock);
50: use Apache::lonlocal;
51: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
52: use Time::HiRes qw( gettimeofday tv_interval );
53: use Cache::Memcached;
54: my $readit;
55: my $max_connection_retries = 10; # Or some such value.
56:
57: =pod
58:
59: =head1 Package Variables
60:
61: These are largely undocumented, so if you decipher one please note it here.
62:
63: =over 4
64:
65: =item $processmarker
66:
67: Contains the time this process was started and this servers host id.
68:
69: =item $dumpcount
70:
71: Counts the number of times a message log flush has been attempted (regardless
72: of success) by this process. Used as part of the filename when messages are
73: delayed.
74:
75: =back
76:
77: =cut
78:
79:
80: # --------------------------------------------------------------------- Logging
81:
82: sub logtouch {
83: my $execdir=$perlvar{'lonDaemons'};
84: unless (-e "$execdir/logs/lonnet.log") {
85: open(my $fh,">>$execdir/logs/lonnet.log");
86: close $fh;
87: }
88: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
89: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
90: }
91:
92: sub logthis {
93: my $message=shift;
94: my $execdir=$perlvar{'lonDaemons'};
95: my $now=time;
96: my $local=localtime($now);
97: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
98: print $fh "$local ($$): $message\n";
99: close($fh);
100: }
101: return 1;
102: }
103:
104: sub logperm {
105: my $message=shift;
106: my $execdir=$perlvar{'lonDaemons'};
107: my $now=time;
108: my $local=localtime($now);
109: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
110: print $fh "$now:$message:$local\n";
111: close($fh);
112: }
113: return 1;
114: }
115:
116: # -------------------------------------------------- Non-critical communication
117: sub subreply {
118: my ($cmd,$server)=@_;
119: my $peerfile="$perlvar{'lonSockDir'}/$server";
120: #
121: # With loncnew process trimming, there's a timing hole between lonc server
122: # process exit and the master server picking up the listen on the AF_UNIX
123: # socket. In that time interval, a lock file will exist:
124:
125: my $lockfile=$peerfile.".lock";
126: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
127: sleep(1);
128: }
129: # At this point, either a loncnew parent is listening or an old lonc
130: # or loncnew child is listening so we can connect or everything's dead.
131: #
132: # We'll give the connection a few tries before abandoning it. If
133: # connection is not possible, we'll con_lost back to the client.
134: #
135: my $client;
136: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
137: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
138: Type => SOCK_STREAM,
139: Timeout => 10);
140: if($client) {
141: last; # Connected!
142: }
143: sleep(1); # Try again later if failed connection.
144: }
145: my $answer;
146: if ($client) {
147: print $client "$cmd\n";
148: $answer=<$client>;
149: if (!$answer) { $answer="con_lost"; }
150: chomp($answer);
151: } else {
152: $answer = 'con_lost'; # Failed connection.
153: }
154: return $answer;
155: }
156:
157: sub reply {
158: my ($cmd,$server)=@_;
159: unless (defined($hostname{$server})) { return 'no_such_host'; }
160: my $answer=subreply($cmd,$server);
161: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
162: &logthis("<font color=blue>WARNING:".
163: " $cmd to $server returned $answer</font>");
164: }
165: return $answer;
166: }
167:
168: # ----------------------------------------------------------- Send USR1 to lonc
169:
170: sub reconlonc {
171: my $peerfile=shift;
172: &logthis("Trying to reconnect for $peerfile");
173: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
174: if (open(my $fh,"<$loncfile")) {
175: my $loncpid=<$fh>;
176: chomp($loncpid);
177: if (kill 0 => $loncpid) {
178: &logthis("lonc at pid $loncpid responding, sending USR1");
179: kill USR1 => $loncpid;
180: sleep 1;
181: if (-e "$peerfile") { return; }
182: &logthis("$peerfile still not there, give it another try");
183: sleep 5;
184: if (-e "$peerfile") { return; }
185: &logthis(
186: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
187: } else {
188: &logthis(
189: "<font color=blue>WARNING:".
190: " lonc at pid $loncpid not responding, giving up</font>");
191: }
192: } else {
193: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
194: }
195: }
196:
197: # ------------------------------------------------------ Critical communication
198:
199: sub critical {
200: my ($cmd,$server)=@_;
201: unless ($hostname{$server}) {
202: &logthis("<font color=blue>WARNING:".
203: " Critical message to unknown server ($server)</font>");
204: return 'no_such_host';
205: }
206: my $answer=reply($cmd,$server);
207: if ($answer eq 'con_lost') {
208: &reconlonc("$perlvar{'lonSockDir'}/$server");
209: my $answer=reply($cmd,$server);
210: if ($answer eq 'con_lost') {
211: my $now=time;
212: my $middlename=$cmd;
213: $middlename=substr($middlename,0,16);
214: $middlename=~s/\W//g;
215: my $dfilename=
216: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
217: $dumpcount++;
218: {
219: my $dfh;
220: if (open($dfh,">$dfilename")) {
221: print $dfh "$cmd\n";
222: close($dfh);
223: }
224: }
225: sleep 2;
226: my $wcmd='';
227: {
228: my $dfh;
229: if (open($dfh,"<$dfilename")) {
230: $wcmd=<$dfh>;
231: close($dfh);
232: }
233: }
234: chomp($wcmd);
235: if ($wcmd eq $cmd) {
236: &logthis("<font color=blue>WARNING: ".
237: "Connection buffer $dfilename: $cmd</font>");
238: &logperm("D:$server:$cmd");
239: return 'con_delayed';
240: } else {
241: &logthis("<font color=red>CRITICAL:"
242: ." Critical connection failed: $server $cmd</font>");
243: &logperm("F:$server:$cmd");
244: return 'con_failed';
245: }
246: }
247: }
248: return $answer;
249: }
250:
251: #
252: # -------------- Remove all key from the env that start witha lowercase letter
253: # (Which is always a lon-capa value)
254:
255: sub cleanenv {
256: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
257: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
258: foreach my $key (keys(%ENV)) {
259: if ($key =~ /^[a-z]/) {
260: delete($ENV{$key});
261: }
262: }
263: }
264:
265: # ------------------------------------------- Transfer profile into environment
266:
267: sub transfer_profile_to_env {
268: my ($lonidsdir,$handle)=@_;
269: my @profile;
270: {
271: open(my $idf,"$lonidsdir/$handle.id");
272: flock($idf,LOCK_SH);
273: @profile=<$idf>;
274: close($idf);
275: }
276: my $envi;
277: my %Remove;
278: for ($envi=0;$envi<=$#profile;$envi++) {
279: chomp($profile[$envi]);
280: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
281: $ENV{$envname} = $envvalue;
282: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
283: if ($time < time-300) {
284: $Remove{$key}++;
285: }
286: }
287: }
288: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
289: foreach my $expired_key (keys(%Remove)) {
290: &delenv($expired_key);
291: }
292: }
293:
294: # ---------------------------------------------------------- Append Environment
295:
296: sub appenv {
297: my %newenv=@_;
298: foreach (keys %newenv) {
299: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
300: &logthis("<font color=blue>WARNING: ".
301: "Attempt to modify environment ".$_." to ".$newenv{$_}
302: .'</font>');
303: delete($newenv{$_});
304: } else {
305: $ENV{$_}=$newenv{$_};
306: }
307: }
308:
309: my $lockfh;
310: unless (open($lockfh,"$ENV{'user.environment'}")) {
311: return 'error: '.$!;
312: }
313: unless (flock($lockfh,LOCK_EX)) {
314: &logthis("<font color=blue>WARNING: ".
315: 'Could not obtain exclusive lock in appenv: '.$!);
316: close($lockfh);
317: return 'error: '.$!;
318: }
319:
320: my @oldenv;
321: {
322: my $fh;
323: unless (open($fh,"$ENV{'user.environment'}")) {
324: return 'error: '.$!;
325: }
326: @oldenv=<$fh>;
327: close($fh);
328: }
329: for (my $i=0; $i<=$#oldenv; $i++) {
330: chomp($oldenv[$i]);
331: if ($oldenv[$i] ne '') {
332: my ($name,$value)=split(/=/,$oldenv[$i]);
333: unless (defined($newenv{$name})) {
334: $newenv{$name}=$value;
335: }
336: }
337: }
338: {
339: my $fh;
340: unless (open($fh,">$ENV{'user.environment'}")) {
341: return 'error';
342: }
343: my $newname;
344: foreach $newname (keys %newenv) {
345: print $fh "$newname=$newenv{$newname}\n";
346: }
347: close($fh);
348: }
349:
350: close($lockfh);
351: return 'ok';
352: }
353: # ----------------------------------------------------- Delete from Environment
354:
355: sub delenv {
356: my $delthis=shift;
357: my %newenv=();
358: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
359: &logthis("<font color=blue>WARNING: ".
360: "Attempt to delete from environment ".$delthis);
361: return 'error';
362: }
363: my @oldenv;
364: {
365: my $fh;
366: unless (open($fh,"$ENV{'user.environment'}")) {
367: return 'error';
368: }
369: unless (flock($fh,LOCK_SH)) {
370: &logthis("<font color=blue>WARNING: ".
371: 'Could not obtain shared lock in delenv: '.$!);
372: close($fh);
373: return 'error: '.$!;
374: }
375: @oldenv=<$fh>;
376: close($fh);
377: }
378: {
379: my $fh;
380: unless (open($fh,">$ENV{'user.environment'}")) {
381: return 'error';
382: }
383: unless (flock($fh,LOCK_EX)) {
384: &logthis("<font color=blue>WARNING: ".
385: 'Could not obtain exclusive lock in delenv: '.$!);
386: close($fh);
387: return 'error: '.$!;
388: }
389: foreach (@oldenv) {
390: if ($_=~/^$delthis/) {
391: my ($key,undef) = split('=',$_);
392: delete($ENV{$key});
393: } else {
394: print $fh $_;
395: }
396: }
397: close($fh);
398: }
399: return 'ok';
400: }
401:
402: # ------------------------------------------ Find out current server userload
403: # there is a copy in lond
404: sub userload {
405: my $numusers=0;
406: {
407: opendir(LONIDS,$perlvar{'lonIDsDir'});
408: my $filename;
409: my $curtime=time;
410: while ($filename=readdir(LONIDS)) {
411: if ($filename eq '.' || $filename eq '..') {next;}
412: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
413: if ($curtime-$mtime < 1800) { $numusers++; }
414: }
415: closedir(LONIDS);
416: }
417: my $userloadpercent=0;
418: my $maxuserload=$perlvar{'lonUserLoadLim'};
419: if ($maxuserload) {
420: $userloadpercent=100*$numusers/$maxuserload;
421: }
422: $userloadpercent=sprintf("%.2f",$userloadpercent);
423: return $userloadpercent;
424: }
425:
426: # ------------------------------------------ Fight off request when overloaded
427:
428: sub overloaderror {
429: my ($r,$checkserver)=@_;
430: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
431: my $loadavg;
432: if ($checkserver eq $perlvar{'lonHostID'}) {
433: open(my $loadfile,'/proc/loadavg');
434: $loadavg=<$loadfile>;
435: $loadavg =~ s/\s.*//g;
436: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
437: close($loadfile);
438: } else {
439: $loadavg=&reply('load',$checkserver);
440: }
441: my $overload=$loadavg-100;
442: if ($overload>0) {
443: $r->err_headers_out->{'Retry-After'}=$overload;
444: $r->log_error('Overload of '.$overload.' on '.$checkserver);
445: return 413;
446: }
447: return '';
448: }
449:
450: # ------------------------------ Find server with least workload from spare.tab
451:
452: sub spareserver {
453: my ($loadpercent,$userloadpercent) = @_;
454: my $tryserver;
455: my $spareserver='';
456: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
457: my $lowestserver=$loadpercent > $userloadpercent?
458: $loadpercent : $userloadpercent;
459: foreach $tryserver (keys %spareid) {
460: my $loadans=reply('load',$tryserver);
461: my $userloadans=reply('userload',$tryserver);
462: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
463: next; #didn't get a number from the server
464: }
465: my $answer;
466: if ($loadans =~ /\d/) {
467: if ($userloadans =~ /\d/) {
468: #both are numbers, pick the bigger one
469: $answer=$loadans > $userloadans?
470: $loadans : $userloadans;
471: } else {
472: $answer = $loadans;
473: }
474: } else {
475: $answer = $userloadans;
476: }
477: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
478: $spareserver="http://$hostname{$tryserver}";
479: $lowestserver=$answer;
480: }
481: }
482: return $spareserver;
483: }
484:
485: # --------------------------------------------- Try to change a user's password
486:
487: sub changepass {
488: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
489: $currentpass = &escape($currentpass);
490: $newpass = &escape($newpass);
491: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
492: $server);
493: if (! $answer) {
494: &logthis("No reply on password change request to $server ".
495: "by $uname in domain $udom.");
496: } elsif ($answer =~ "^ok") {
497: &logthis("$uname in $udom successfully changed their password ".
498: "on $server.");
499: } elsif ($answer =~ "^pwchange_failure") {
500: &logthis("$uname in $udom was unable to change their password ".
501: "on $server. The action was blocked by either lcpasswd ".
502: "or pwchange");
503: } elsif ($answer =~ "^non_authorized") {
504: &logthis("$uname in $udom did not get their password correct when ".
505: "attempting to change it on $server.");
506: } elsif ($answer =~ "^auth_mode_error") {
507: &logthis("$uname in $udom attempted to change their password despite ".
508: "not being locally or internally authenticated on $server.");
509: } elsif ($answer =~ "^unknown_user") {
510: &logthis("$uname in $udom attempted to change their password ".
511: "on $server but were unable to because $server is not ".
512: "their home server.");
513: } elsif ($answer =~ "^refused") {
514: &logthis("$server refused to change $uname in $udom password because ".
515: "it was sent an unencrypted request to change the password.");
516: }
517: return $answer;
518: }
519:
520: # ----------------------- Try to determine user's current authentication scheme
521:
522: sub queryauthenticate {
523: my ($uname,$udom)=@_;
524: my $uhome=&homeserver($uname,$udom);
525: if (!$uhome) {
526: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
527: return 'no_host';
528: }
529: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
530: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
531: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
532: }
533: return $answer;
534: }
535:
536: # --------- Try to authenticate user from domain's lib servers (first this one)
537:
538: sub authenticate {
539: my ($uname,$upass,$udom)=@_;
540: $upass=escape($upass);
541: $uname=~s/\W//g;
542: my $uhome=&homeserver($uname,$udom);
543: if (!$uhome) {
544: &logthis("User $uname at $udom is unknown in authenticate");
545: return 'no_host';
546: }
547: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
548: if ($answer eq 'authorized') {
549: &logthis("User $uname at $udom authorized by $uhome");
550: return $uhome;
551: }
552: if ($answer eq 'non_authorized') {
553: &logthis("User $uname at $udom rejected by $uhome");
554: return 'no_host';
555: }
556: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
557: return 'no_host';
558: }
559:
560: # ---------------------- Find the homebase for a user from domain's lib servers
561:
562: sub homeserver {
563: my ($uname,$udom,$ignoreBadCache)=@_;
564: my $index="$uname:$udom";
565:
566: my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
567: if (defined($cached)) { return $result; }
568: my $tryserver;
569: foreach $tryserver (keys %libserv) {
570: next if ($ignoreBadCache ne 'true' &&
571: exists($badServerCache{$tryserver}));
572: if ($hostdom{$tryserver} eq $udom) {
573: my $answer=reply("home:$udom:$uname",$tryserver);
574: if ($answer eq 'found') {
575: return &do_cache(\%homecache,$index,$tryserver,'home');
576: } elsif ($answer eq 'no_host') {
577: $badServerCache{$tryserver}=1;
578: }
579: }
580: }
581: return 'no_host';
582: }
583:
584: # ------------------------------------- Find the usernames behind a list of IDs
585:
586: sub idget {
587: my ($udom,@ids)=@_;
588: my %returnhash=();
589:
590: my $tryserver;
591: foreach $tryserver (keys %libserv) {
592: if ($hostdom{$tryserver} eq $udom) {
593: my $idlist=join('&',@ids);
594: $idlist=~tr/A-Z/a-z/;
595: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
596: my @answer=();
597: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
598: @answer=split(/\&/,$reply);
599: } ;
600: my $i;
601: for ($i=0;$i<=$#ids;$i++) {
602: if ($answer[$i]) {
603: $returnhash{$ids[$i]}=$answer[$i];
604: }
605: }
606: }
607: }
608: return %returnhash;
609: }
610:
611: # ------------------------------------- Find the IDs behind a list of usernames
612:
613: sub idrget {
614: my ($udom,@unames)=@_;
615: my %returnhash=();
616: foreach (@unames) {
617: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
618: }
619: return %returnhash;
620: }
621:
622: # ------------------------------- Store away a list of names and associated IDs
623:
624: sub idput {
625: my ($udom,%ids)=@_;
626: my %servers=();
627: foreach (keys %ids) {
628: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
629: my $uhom=&homeserver($_,$udom);
630: if ($uhom ne 'no_host') {
631: my $id=&escape($ids{$_});
632: $id=~tr/A-Z/a-z/;
633: my $unam=&escape($_);
634: if ($servers{$uhom}) {
635: $servers{$uhom}.='&'.$id.'='.$unam;
636: } else {
637: $servers{$uhom}=$id.'='.$unam;
638: }
639: }
640: }
641: foreach (keys %servers) {
642: &critical('idput:'.$udom.':'.$servers{$_},$_);
643: }
644: }
645:
646: # --------------------------------------------------- Assign a key to a student
647:
648: sub assign_access_key {
649: #
650: # a valid key looks like uname:udom#comments
651: # comments are being appended
652: #
653: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
654: $kdom=
655: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($kdom));
656: $knum=
657: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($knum));
658: $cdom=
659: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
660: $cnum=
661: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
662: $udom=$ENV{'user.name'} unless (defined($udom));
663: $uname=$ENV{'user.domain'} unless (defined($uname));
664: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
665: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
666: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
667: # assigned to this person
668: # - this should not happen,
669: # unless something went wrong
670: # the first time around
671: # ready to assign
672: $logentry=$1.'; '.$logentry;
673: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
674: $kdom,$knum) eq 'ok') {
675: # key now belongs to user
676: my $envkey='key.'.$cdom.'_'.$cnum;
677: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
678: &appenv('environment.'.$envkey => $ckey);
679: return 'ok';
680: } else {
681: return
682: 'error: Count not permanently assign key, will need to be re-entered later.';
683: }
684: } else {
685: return 'error: Could not assign key, try again later.';
686: }
687: } elsif (!$existing{$ckey}) {
688: # the key does not exist
689: return 'error: The key does not exist';
690: } else {
691: # the key is somebody else's
692: return 'error: The key is already in use';
693: }
694: }
695:
696: # ------------------------------------------ put an additional comment on a key
697:
698: sub comment_access_key {
699: #
700: # a valid key looks like uname:udom#comments
701: # comments are being appended
702: #
703: my ($ckey,$cdom,$cnum,$logentry)=@_;
704: $cdom=
705: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
706: $cnum=
707: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
708: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
709: if ($existing{$ckey}) {
710: $existing{$ckey}.='; '.$logentry;
711: # ready to assign
712: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
713: $cdom,$cnum) eq 'ok') {
714: return 'ok';
715: } else {
716: return 'error: Count not store comment.';
717: }
718: } else {
719: # the key does not exist
720: return 'error: The key does not exist';
721: }
722: }
723:
724: # ------------------------------------------------------ Generate a set of keys
725:
726: sub generate_access_keys {
727: my ($number,$cdom,$cnum,$logentry)=@_;
728: $cdom=
729: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
730: $cnum=
731: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
732: unless (&allowed('mky',$cdom)) { return 0; }
733: unless (($cdom) && ($cnum)) { return 0; }
734: if ($number>10000) { return 0; }
735: sleep(2); # make sure don't get same seed twice
736: srand(time()^($$+($$<<15))); # from "Programming Perl"
737: my $total=0;
738: for (my $i=1;$i<=$number;$i++) {
739: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
740: sprintf("%lx",int(100000*rand)).'-'.
741: sprintf("%lx",int(100000*rand));
742: $newkey=~s/1/g/g; # folks mix up 1 and l
743: $newkey=~s/0/h/g; # and also 0 and O
744: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
745: if ($existing{$newkey}) {
746: $i--;
747: } else {
748: if (&put('accesskeys',
749: { $newkey => '# generated '.localtime().
750: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
751: '; '.$logentry },
752: $cdom,$cnum) eq 'ok') {
753: $total++;
754: }
755: }
756: }
757: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
758: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
759: return $total;
760: }
761:
762: # ------------------------------------------------------- Validate an accesskey
763:
764: sub validate_access_key {
765: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
766: $cdom=
767: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
768: $cnum=
769: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
770: $udom=$ENV{'user.domain'} unless (defined($udom));
771: $uname=$ENV{'user.name'} unless (defined($uname));
772: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
773: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
774: }
775:
776: # ------------------------------------- Find the section of student in a course
777:
778: sub getsection {
779: my ($udom,$unam,$courseid)=@_;
780: $courseid=~s/\_/\//g;
781: $courseid=~s/^(\w)/\/$1/;
782:
783: my $hashid="$udom:$unam:$courseid";
784: my ($result,$cached)=&is_cached(\%getsectioncache,$hashid,'getsection');
785: if (defined($cached)) { return $result; }
786:
787: my %Pending;
788: my %Expired;
789: #
790: # Each role can either have not started yet (pending), be active,
791: # or have expired.
792: #
793: # If there is an active role, we are done.
794: #
795: # If there is more than one role which has not started yet,
796: # choose the one which will start sooner
797: # If there is one role which has not started yet, return it.
798: #
799: # If there is more than one expired role, choose the one which ended last.
800: # If there is a role which has expired, return it.
801: #
802: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
803: &homeserver($unam,$udom)))) {
804: my ($key,$value)=split(/\=/,$_);
805: $key=&unescape($key);
806: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
807: my $section=$1;
808: if ($key eq $courseid.'_st') { $section=''; }
809: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
810: my $now=time;
811: if (defined($end) && $end && ($now > $end)) {
812: $Expired{$end}=$section;
813: next;
814: }
815: if (defined($start) && $start && ($now < $start)) {
816: $Pending{$start}=$section;
817: next;
818: }
819: return &do_cache(\%getsectioncache,$hashid,$section,'getsection');
820: }
821: #
822: # Presumedly there will be few matching roles from the above
823: # loop and the sorting time will be negligible.
824: if (scalar(keys(%Pending))) {
825: my ($time) = sort {$a <=> $b} keys(%Pending);
826: return &do_cache(\%getsectioncache,$hashid,$Pending{$time},'getsection');
827: }
828: if (scalar(keys(%Expired))) {
829: my @sorted = sort {$a <=> $b} keys(%Expired);
830: my $time = pop(@sorted);
831: return &do_cache(\%getsectioncache,$hashid,$Expired{$time},'getsection');
832: }
833: return &do_cache(\%getsectioncache,$hashid,'-1','getsection');
834: }
835:
836:
837: my $disk_caching_disabled=1;
838:
839: sub devalidate_cache {
840: my ($cache,$id,$name) = @_;
841: delete $$cache{$id.'.time'};
842: delete $$cache{$id.'.file'};
843: delete $$cache{$id};
844: if (1 || $disk_caching_disabled) { return; }
845: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
846: if (!-e $filename) { return; }
847: open(DB,">$filename.lock");
848: flock(DB,LOCK_EX);
849: my %hash;
850: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
851: eval <<'EVALBLOCK';
852: delete($hash{$id});
853: delete($hash{$id.'.time'});
854: EVALBLOCK
855: if ($@) {
856: &logthis("<font color='red'>devalidate_cache blew up :$@:$name</font>");
857: unlink($filename);
858: }
859: } else {
860: if (-e $filename) {
861: &logthis("Unable to tie hash (devalidate cache): $name");
862: unlink($filename);
863: }
864: }
865: untie(%hash);
866: flock(DB,LOCK_UN);
867: close(DB);
868: }
869:
870: sub is_cached {
871: my ($cache,$id,$name,$time) = @_;
872: if (!$time) { $time=300; }
873: if (!exists($$cache{$id.'.time'})) {
874: &load_cache_item($cache,$name,$id,$time);
875: }
876: if (!exists($$cache{$id.'.time'})) {
877: # &logthis("Didn't find $id");
878: return (undef,undef);
879: } else {
880: if (time-($$cache{$id.'.time'})>$time) {
881: if (exists($$cache{$id.'.file'})) {
882: foreach my $filename (@{ $$cache{$id.'.file'} }) {
883: my $mtime=(stat($filename))[9];
884: #+1 is to take care of edge effects
885: if ($mtime && (($mtime+1) < ($$cache{$id.'.time'}))) {
886: # &logthis("Upping $mtime - ".$$cache{$id.'.time'}.
887: # "$id because of $filename");
888: } else {
889: &logthis("Devalidating $filename $id - ".(time-($$cache{$id.'.time'})));
890: &devalidate_cache($cache,$id,$name);
891: return (undef,undef);
892: }
893: }
894: $$cache{$id.'.time'}=time;
895: } else {
896: # &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
897: &devalidate_cache($cache,$id,$name);
898: return (undef,undef);
899: }
900: }
901: }
902: return ($$cache{$id},1);
903: }
904:
905: sub do_cache {
906: my ($cache,$id,$value,$name) = @_;
907: $$cache{$id.'.time'}=time;
908: $$cache{$id}=$value;
909: # &logthis("Caching $id as :$value:");
910: &save_cache_item($cache,$name,$id);
911: # do_cache implictly return the set value
912: $$cache{$id};
913: }
914:
915: my %do_save_item;
916: my %do_save;
917: sub save_cache_item {
918: my ($cache,$name,$id)=@_;
919: if ($disk_caching_disabled) { return; }
920: $do_save{$name}=$cache;
921: if (!exists($do_save_item{$name})) { $do_save_item{$name}={} }
922: $do_save_item{$name}->{$id}=1;
923: return;
924: }
925:
926: sub save_cache {
927: if ($disk_caching_disabled) { return; }
928: my ($cache,$name,$id);
929: foreach $name (keys(%do_save)) {
930: $cache=$do_save{$name};
931:
932: my $starttime=&Time::HiRes::time();
933: &logthis("Saving :$name:");
934: my %hash;
935: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
936: open(DB,">$filename.lock");
937: flock(DB,LOCK_EX);
938: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
939: foreach $id (keys(%{ $do_save_item{$name} })) {
940: eval <<'EVALBLOCK';
941: $hash{$id.'.time'}=$$cache{$id.'.time'};
942: $hash{$id}=freeze({'item'=>$$cache{$id}});
943: if (exists($$cache{$id.'.file'})) {
944: $hash{$id.'.file'}=freeze({'item'=>$$cache{$id.'.file'}});
945: }
946: EVALBLOCK
947: if ($@) {
948: &logthis("<font color='red'>save_cache blew up :$@:$name</font>");
949: unlink($filename);
950: last;
951: }
952: }
953: } else {
954: if (-e $filename) {
955: &logthis("Unable to tie hash (save cache): $name ($!)");
956: unlink($filename);
957: }
958: }
959: untie(%hash);
960: flock(DB,LOCK_UN);
961: close(DB);
962: &logthis("save_cache $name took ".(&Time::HiRes::time()-$starttime));
963: }
964: undef(%do_save);
965: undef(%do_save_item);
966:
967: }
968:
969: sub load_cache_item {
970: my ($cache,$name,$id,$time)=@_;
971: if ($disk_caching_disabled) { return; }
972: my $starttime=&Time::HiRes::time();
973: # &logthis("Before Loading $name for $id size is ".scalar(%$cache));
974: my %hash;
975: my $filename=$perlvar{'lonDaemons'}.'/tmp/lonnet_internal_cache_'.$name.".db";
976: if (!-e $filename) { return; }
977: open(DB,">$filename.lock");
978: flock(DB,LOCK_SH);
979: if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
980: eval <<'EVALBLOCK';
981: if (!%$cache) {
982: my $count;
983: while (my ($key,$value)=each(%hash)) {
984: $count++;
985: if ($key =~ /\.time$/) {
986: $$cache{$key}=$value;
987: } else {
988: my $hashref=thaw($value);
989: $$cache{$key}=$hashref->{'item'};
990: }
991: }
992: # &logthis("Initial load: $count");
993: } else {
994: if (($$cache{$id.'.time'}+$time) < time) {
995: $$cache{$id.'.time'}=$hash{$id.'.time'};
996: {
997: my $hashref=thaw($hash{$id});
998: $$cache{$id}=$hashref->{'item'};
999: }
1000: if (exists($hash{$id.'.file'})) {
1001: my $hashref=thaw($hash{$id.'.file'});
1002: $$cache{$id.'.file'}=$hashref->{'item'};
1003: }
1004: }
1005: }
1006: EVALBLOCK
1007: if ($@) {
1008: &logthis("<font color='red'>load_cache blew up :$@:$name</font>");
1009: unlink($filename);
1010: }
1011: } else {
1012: if (-e $filename) {
1013: &logthis("Unable to tie hash (load cache item): $name ($!)");
1014: unlink($filename);
1015: }
1016: }
1017: untie(%hash);
1018: flock(DB,LOCK_UN);
1019: close(DB);
1020: # &logthis("After Loading $name size is ".scalar(%$cache));
1021: # &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
1022: }
1023:
1024: sub devalidate_cache_new {
1025: my ($cache,$name,$id) = @_;
1026: if (1) { &Apache::lonnet::logthis("deleting $name:$id"); }
1027: $cache->delete(&escape($name.':'.$id));
1028: }
1029:
1030: my $to_remember=10;
1031: my %remembered;
1032: my %accessed;
1033: sub is_cached_new {
1034: my ($cache,$name,$id,$debug) = @_;
1035: $debug=0;
1036: $id=&escape($name.':'.$id);
1037: if (exists($remembered{$id})) {
1038: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
1039: $accessed{$id}=[&gettimeofday()];
1040: return ($remembered{$id},1);
1041: }
1042: my $value = $cache->get($id);
1043: if (!(defined($value))) {
1044: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
1045: return (undef,undef);
1046: }
1047: &make_room($id,$value);
1048: if ($value eq '__undef__') {
1049: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
1050: return (undef,1);
1051: }
1052: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
1053: return ($value,1);
1054: }
1055:
1056: sub do_cache_new {
1057: my ($cache,$name,$id,$value,$time,$debug) = @_;
1058: $debug=0;
1059: $id=&escape($name.':'.$id);
1060: my $setvalue=$value;
1061: if (!defined($setvalue)) {
1062: $setvalue='__undef__';
1063: }
1064: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
1065: $cache->set($id,$setvalue,300);
1066: return $value;
1067: }
1068:
1069: my $kicks=0;
1070: sub make_room {
1071: my ($id,$value)=@_;
1072: my $debug=0;
1073: $remembered{$id}=$value;
1074: $accessed{$id}=[&gettimeofday()];
1075: if (scalar(keys(%remembered)) <= $to_remember) { return; }
1076: my $to_kick;
1077: my $max_time=0;
1078: foreach my $other (keys(%accessed)) {
1079: if (&tv_interval($accessed{$other}) > $max_time) {
1080: $to_kick=$other;
1081: $max_time=&tv_interval($accessed{$other});
1082: }
1083: }
1084: delete($remembered{$to_kick});
1085: delete($accessed{$to_kick});
1086: $kicks++;
1087: if ($debug) { &logthis("kicking $max_time $kicks\n"); }
1088: return;
1089: }
1090:
1091: # ------------------------------------- Read an entry from a user's environment
1092:
1093: sub userenvironment {
1094: my ($udom,$unam,@what)=@_;
1095: my %returnhash=();
1096: my @answer=split(/\&/,
1097: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1098: &homeserver($unam,$udom)));
1099: my $i;
1100: for ($i=0;$i<=$#what;$i++) {
1101: $returnhash{$what[$i]}=&unescape($answer[$i]);
1102: }
1103: return %returnhash;
1104: }
1105:
1106: # -------------------------------------------------------------------- New chat
1107:
1108: sub chatsend {
1109: my ($newentry,$anon)=@_;
1110: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1111: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1112: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1113: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1114: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
1115: &escape($newentry)),$chome);
1116: }
1117:
1118: # ------------------------------------------ Find current version of a resource
1119:
1120: sub getversion {
1121: my $fname=&clutter(shift);
1122: unless ($fname=~/^\/res\//) { return -1; }
1123: return ¤tversion(&filelocation('',$fname));
1124: }
1125:
1126: sub currentversion {
1127: my $fname=shift;
1128: my ($result,$cached)=&is_cached(\%resversioncache,$fname,'resversion',600);
1129: if (defined($cached)) { return $result; }
1130: my $author=$fname;
1131: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1132: my ($udom,$uname)=split(/\//,$author);
1133: my $home=homeserver($uname,$udom);
1134: if ($home eq 'no_host') {
1135: return -1;
1136: }
1137: my $answer=reply("currentversion:$fname",$home);
1138: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1139: return -1;
1140: }
1141: return &do_cache(\%resversioncache,$fname,$answer,'resversion');
1142: }
1143:
1144: # ----------------------------- Subscribe to a resource, return URL if possible
1145:
1146: sub subscribe {
1147: my $fname=shift;
1148: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1149: $fname=~s/[\n\r]//g;
1150: my $author=$fname;
1151: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1152: my ($udom,$uname)=split(/\//,$author);
1153: my $home=homeserver($uname,$udom);
1154: if ($home eq 'no_host') {
1155: return 'not_found';
1156: }
1157: my $answer=reply("sub:$fname",$home);
1158: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1159: $answer.=' by '.$home;
1160: }
1161: return $answer;
1162: }
1163:
1164: # -------------------------------------------------------------- Replicate file
1165:
1166: sub repcopy {
1167: my $filename=shift;
1168: $filename=~s/\/+/\//g;
1169: if ($filename=~m|^/home/httpd/html/adm/|) { return OK; }
1170: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return OK; }
1171: if ($filename=~m|^/home/httpd/html/userfiles/| or
1172: $filename=~m|^/*uploaded/|) {
1173: return &repcopy_userfile($filename);
1174: }
1175: $filename=~s/[\n\r]//g;
1176: my $transname="$filename.in.transfer";
1177: if ((-e $filename) || (-e $transname)) { return OK; }
1178: my $remoteurl=subscribe($filename);
1179: if ($remoteurl =~ /^con_lost by/) {
1180: &logthis("Subscribe returned $remoteurl: $filename");
1181: return HTTP_SERVICE_UNAVAILABLE;
1182: } elsif ($remoteurl eq 'not_found') {
1183: #&logthis("Subscribe returned not_found: $filename");
1184: return HTTP_NOT_FOUND;
1185: } elsif ($remoteurl =~ /^rejected by/) {
1186: &logthis("Subscribe returned $remoteurl: $filename");
1187: return FORBIDDEN;
1188: } elsif ($remoteurl eq 'directory') {
1189: return OK;
1190: } else {
1191: my $author=$filename;
1192: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1193: my ($udom,$uname)=split(/\//,$author);
1194: my $home=homeserver($uname,$udom);
1195: unless ($home eq $perlvar{'lonHostID'}) {
1196: my @parts=split(/\//,$filename);
1197: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1198: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1199: &logthis("Malconfiguration for replication: $filename");
1200: return HTTP_BAD_REQUEST;
1201: }
1202: my $count;
1203: for ($count=5;$count<$#parts;$count++) {
1204: $path.="/$parts[$count]";
1205: if ((-e $path)!=1) {
1206: mkdir($path,0777);
1207: }
1208: }
1209: my $ua=new LWP::UserAgent;
1210: my $request=new HTTP::Request('GET',"$remoteurl");
1211: my $response=$ua->request($request,$transname);
1212: if ($response->is_error()) {
1213: unlink($transname);
1214: my $message=$response->status_line;
1215: &logthis("<font color=blue>WARNING:"
1216: ." LWP get: $message: $filename</font>");
1217: return HTTP_SERVICE_UNAVAILABLE;
1218: } else {
1219: if ($remoteurl!~/\.meta$/) {
1220: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1221: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1222: if ($mresponse->is_error()) {
1223: unlink($filename.'.meta');
1224: &logthis(
1225: "<font color=yellow>INFO: No metadata: $filename</font>");
1226: }
1227: }
1228: rename($transname,$filename);
1229: return OK;
1230: }
1231: }
1232: }
1233: }
1234:
1235: # ------------------------------------------------ Get server side include body
1236: sub ssi_body {
1237: my ($filelink,%form)=@_;
1238: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1239: &ssi($filelink,%form));
1240: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1241: $output=~s/^.*?\<body[^\>]*\>//si;
1242: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1243: return $output;
1244: }
1245:
1246: # --------------------------------------------------------- Server Side Include
1247:
1248: sub ssi {
1249:
1250: my ($fn,%form)=@_;
1251:
1252: my $ua=new LWP::UserAgent;
1253:
1254: my $request;
1255:
1256: if (%form) {
1257: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1258: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1259: } else {
1260: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1261: }
1262:
1263: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1264: my $response=$ua->request($request);
1265:
1266: return $response->content;
1267: }
1268:
1269: sub externalssi {
1270: my ($url)=@_;
1271: my $ua=new LWP::UserAgent;
1272: my $request=new HTTP::Request('GET',$url);
1273: my $response=$ua->request($request);
1274: return $response->content;
1275: }
1276:
1277: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1278:
1279: sub allowuploaded {
1280: my ($srcurl,$url)=@_;
1281: $url=&clutter(&declutter($url));
1282: my $dir=$url;
1283: $dir=~s/\/[^\/]+$//;
1284: my %httpref=();
1285: my $httpurl=&hreflocation('',$url);
1286: $httpref{'httpref.'.$httpurl}=$srcurl;
1287: &Apache::lonnet::appenv(%httpref);
1288: }
1289:
1290: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1291: # input: action, courseID, current domain, home server for course, intended
1292: # path to file, source of file.
1293: # output: url to file (if action was uploaddoc),
1294: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1295: #
1296: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1297: # course.
1298: #
1299: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1300: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1301: # course's home server.
1302: #
1303: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1304: # be copied from $source (current location) to
1305: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1306: # and will then be copied to
1307: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1308: # course's home server.
1309: #
1310: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1311: # will be retrived from $ENV{form.uploaddoc} (from DOCS interface) to
1312: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1313: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1314: # in course's home server.
1315:
1316:
1317: sub process_coursefile {
1318: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1319: my $fetchresult;
1320: if ($action eq 'propagate') {
1321: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1322: ,$docuhome);
1323: } else {
1324: my $fetchresult = '';
1325: my $fpath = '';
1326: my $fname = $file;
1327: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1328: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1329: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1330: unless ($fpath eq '') {
1331: my @parts=split('/',$fpath);
1332: foreach my $part (@parts) {
1333: $filepath.= '/'.$part;
1334: if ((-e $filepath)!=1) {
1335: mkdir($filepath,0777);
1336: }
1337: }
1338: }
1339: if ($action eq 'copy') {
1340: if ($source eq '') {
1341: $fetchresult = 'no source file';
1342: return $fetchresult;
1343: } else {
1344: my $destination = $filepath.'/'.$fname;
1345: rename($source,$destination);
1346: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1347: $docuhome);
1348: }
1349: } elsif ($action eq 'uploaddoc') {
1350: open(my $fh,'>'.$filepath.'/'.$fname);
1351: print $fh $ENV{'form.'.$source};
1352: close($fh);
1353: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1354: $docuhome);
1355: if ($fetchresult eq 'ok') {
1356: return '/uploaded/'.$fpath.'/'.$fname;
1357: } else {
1358: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1359: ' to host '.$docuhome.': '.$fetchresult);
1360: return '/adm/notfound.html';
1361: }
1362: }
1363: }
1364: unless ( $fetchresult eq 'ok') {
1365: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1366: ' to host '.$docuhome.': '.$fetchresult);
1367: }
1368: return $fetchresult;
1369: }
1370:
1371: # --------------- Take an uploaded file and put it into the userfiles directory
1372: # input: name of form element, coursedoc=1 means this is for the course
1373: # output: url of file in userspace
1374:
1375: sub clean_filename {
1376: my ($fname)=@_;
1377: # Replace Windows backslashes by forward slashes
1378: $fname=~s/\\/\//g;
1379: # Get rid of everything but the actual filename
1380: $fname=~s/^.*\/([^\/]+)$/$1/;
1381: # Replace spaces by underscores
1382: $fname=~s/\s+/\_/g;
1383: # Replace all other weird characters by nothing
1384: $fname=~s/[^\w\.\-]//g;
1385: # Replace all .\d. sequences with _\d. so they no longer look like version
1386: # numbers
1387: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1388: return $fname;
1389: }
1390:
1391: sub userfileupload {
1392: my ($formname,$coursedoc,$subdir)=@_;
1393: if (!defined($subdir)) { $subdir='unknown'; }
1394: my $fname=$ENV{'form.'.$formname.'.filename'};
1395: $fname=&clean_filename($fname);
1396: # See if there is anything left
1397: unless ($fname) { return 'error: no uploaded file'; }
1398: chop($ENV{'form.'.$formname});
1399: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1400: my $now = time;
1401: my $filepath = 'tmp/helprequests/'.$now;
1402: my @parts=split(/\//,$filepath);
1403: my $fullpath = $perlvar{'lonDaemons'};
1404: for (my $i=0;$i<@parts;$i++) {
1405: $fullpath .= '/'.$parts[$i];
1406: if ((-e $fullpath)!=1) {
1407: mkdir($fullpath,0777);
1408: }
1409: }
1410: open(my $fh,'>'.$fullpath.'/'.$fname);
1411: print $fh $ENV{'form.'.$formname};
1412: close($fh);
1413: return $fullpath.'/'.$fname;
1414: }
1415: # Create the directory if not present
1416: my $docuname='';
1417: my $docudom='';
1418: my $docuhome='';
1419: $fname="$subdir/$fname";
1420: if ($coursedoc) {
1421: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1422: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1423: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1424: if ($ENV{'form.folder'} =~ m/^default/) {
1425: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1426: } else {
1427: $fname=$ENV{'form.folder'}.'/'.$fname;
1428: return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1429: }
1430: } else {
1431: $docuname=$ENV{'user.name'};
1432: $docudom=$ENV{'user.domain'};
1433: $docuhome=$ENV{'user.home'};
1434: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1435: }
1436: }
1437:
1438: sub finishuserfileupload {
1439: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1440: my $path=$docudom.'/'.$docuname.'/';
1441: my $filepath=$perlvar{'lonDocRoot'};
1442: my ($fnamepath,$file);
1443: $file=$fname;
1444: if ($fname=~m|/|) {
1445: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1446: $path.=$fnamepath.'/';
1447: }
1448: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1449: my $count;
1450: for ($count=4;$count<=$#parts;$count++) {
1451: $filepath.="/$parts[$count]";
1452: if ((-e $filepath)!=1) {
1453: mkdir($filepath,0777);
1454: }
1455: }
1456: # Save the file
1457: {
1458: open(FH,'>'.$filepath.'/'.$file);
1459: print FH $ENV{'form.'.$formname};
1460: close(FH);
1461: }
1462: # Notify homeserver to grep it
1463: #
1464: &Apache::lonnet::logthis("fetching ".$path.$file);
1465: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1466: if ($fetchresult eq 'ok') {
1467: #
1468: # Return the URL to it
1469: return '/uploaded/'.$path.$file;
1470: } else {
1471: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1472: ': '.$fetchresult);
1473: return '/adm/notfound.html';
1474: }
1475: }
1476:
1477: sub removeuploadedurl {
1478: my ($url)=@_;
1479: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1480: return &Apache::lonnet::removeuserfile($uname,$udom,$fname);
1481: }
1482:
1483: sub removeuserfile {
1484: my ($docuname,$docudom,$fname)=@_;
1485: my $home=&homeserver($docuname,$docudom);
1486: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1487: }
1488:
1489: sub mkdiruserfile {
1490: my ($docuname,$docudom,$dir)=@_;
1491: my $home=&homeserver($docuname,$docudom);
1492: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1493: }
1494:
1495: sub renameuserfile {
1496: my ($docuname,$docudom,$old,$new)=@_;
1497: my $home=&homeserver($docuname,$docudom);
1498: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1499: &escape("$new"),$home);
1500: }
1501:
1502: # ------------------------------------------------------------------------- Log
1503:
1504: sub log {
1505: my ($dom,$nam,$hom,$what)=@_;
1506: return critical("log:$dom:$nam:$what",$hom);
1507: }
1508:
1509: # ------------------------------------------------------------------ Course Log
1510: #
1511: # This routine flushes several buffers of non-mission-critical nature
1512: #
1513:
1514: sub flushcourselogs {
1515: &logthis('Flushing log buffers');
1516: #
1517: # course logs
1518: # This is a log of all transactions in a course, which can be used
1519: # for data mining purposes
1520: #
1521: # It also collects the courseid database, which lists last transaction
1522: # times and course titles for all courseids
1523: #
1524: my %courseidbuffer=();
1525: foreach (keys %courselogs) {
1526: my $crsid=$_;
1527: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1528: &escape($courselogs{$crsid}),
1529: $coursehombuf{$crsid}) eq 'ok') {
1530: delete $courselogs{$crsid};
1531: } else {
1532: &logthis('Failed to flush log buffer for '.$crsid);
1533: if (length($courselogs{$crsid})>40000) {
1534: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1535: " exceeded maximum size, deleting.</font>");
1536: delete $courselogs{$crsid};
1537: }
1538: }
1539: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1540: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1541: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1542: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1543: } else {
1544: $courseidbuffer{$coursehombuf{$crsid}}=
1545: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1546: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1547: }
1548: }
1549: #
1550: # Write course id database (reverse lookup) to homeserver of courses
1551: # Is used in pickcourse
1552: #
1553: foreach (keys %courseidbuffer) {
1554: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1555: }
1556: #
1557: # File accesses
1558: # Writes to the dynamic metadata of resources to get hit counts, etc.
1559: #
1560: foreach my $entry (keys(%accesshash)) {
1561: if ($entry =~ /___count$/) {
1562: my ($dom,$name);
1563: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1564: if (! defined($dom) || $dom eq '' ||
1565: ! defined($name) || $name eq '') {
1566: my $cid = $ENV{'request.course.id'};
1567: $dom = $ENV{'request.'.$cid.'.domain'};
1568: $name = $ENV{'request.'.$cid.'.num'};
1569: }
1570: my $value = $accesshash{$entry};
1571: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1572: my %temphash=($url => $value);
1573: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1574: if ($result eq 'ok') {
1575: delete $accesshash{$entry};
1576: } elsif ($result eq 'unknown_cmd') {
1577: # Target server has old code running on it.
1578: my %temphash=($entry => $value);
1579: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1580: delete $accesshash{$entry};
1581: }
1582: }
1583: } else {
1584: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1585: my %temphash=($entry => $accesshash{$entry});
1586: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1587: delete $accesshash{$entry};
1588: }
1589: }
1590: }
1591: #
1592: # Roles
1593: # Reverse lookup of user roles for course faculty/staff and co-authorship
1594: #
1595: foreach (keys %userrolehash) {
1596: my $entry=$_;
1597: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1598: split(/\:/,$entry);
1599: if (&Apache::lonnet::put('nohist_userroles',
1600: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1601: $rudom,$runame) eq 'ok') {
1602: delete $userrolehash{$entry};
1603: }
1604: }
1605: $dumpcount++;
1606: }
1607:
1608: sub courselog {
1609: my $what=shift;
1610: $what=time.':'.$what;
1611: unless ($ENV{'request.course.id'}) { return ''; }
1612: $coursedombuf{$ENV{'request.course.id'}}=
1613: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1614: $coursenumbuf{$ENV{'request.course.id'}}=
1615: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1616: $coursehombuf{$ENV{'request.course.id'}}=
1617: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1618: $coursedescrbuf{$ENV{'request.course.id'}}=
1619: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1620: $courseinstcodebuf{$ENV{'request.course.id'}}=
1621: $ENV{'course.'.$ENV{'request.course.id'}.'.internal.coursecode'};
1622: $courseownerbuf{$ENV{'request.course.id'}}=
1623: $ENV{'course.'.$ENV{'request.course.id'}.'.internal.courseowner'};
1624: if (defined $courselogs{$ENV{'request.course.id'}}) {
1625: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1626: } else {
1627: $courselogs{$ENV{'request.course.id'}}.=$what;
1628: }
1629: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1630: &flushcourselogs();
1631: }
1632: }
1633:
1634: sub courseacclog {
1635: my $fnsymb=shift;
1636: unless ($ENV{'request.course.id'}) { return ''; }
1637: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1638: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1639: $what.=':POST';
1640: # FIXME: Probably ought to escape things....
1641: foreach (keys %ENV) {
1642: if ($_=~/^form\.(.*)/) {
1643: $what.=':'.$1.'='.$ENV{$_};
1644: }
1645: }
1646: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1647: # FIXME: We should not be depending on a form parameter that someone
1648: # editing lonsearchcat.pm might change in the future.
1649: if ($ENV{'form.phase'} eq 'course_search') {
1650: $what.= ':POST';
1651: # FIXME: Probably ought to escape things....
1652: foreach my $element ('courseexp','crsfulltext','crsrelated',
1653: 'crsdiscuss') {
1654: $what.=':'.$element.'='.$ENV{'form.'.$element};
1655: }
1656: }
1657: }
1658: &courselog($what);
1659: }
1660:
1661: sub countacc {
1662: my $url=&declutter(shift);
1663: return if (! defined($url) || $url eq '');
1664: unless ($ENV{'request.course.id'}) { return ''; }
1665: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1666: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1667: $accesshash{$key}++;
1668: }
1669:
1670: sub linklog {
1671: my ($from,$to)=@_;
1672: $from=&declutter($from);
1673: $to=&declutter($to);
1674: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1675: $accesshash{$to.'___'.$from.'___goto'}=1;
1676: }
1677:
1678: sub userrolelog {
1679: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1680: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1681: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1682: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1683: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1684: $userrolehash
1685: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1686: =$tend.':'.$tstart;
1687: }
1688: }
1689:
1690: sub get_course_adv_roles {
1691: my $cid=shift;
1692: $cid=$ENV{'request.course.id'} unless (defined($cid));
1693: my %coursehash=&coursedescription($cid);
1694: my %nothide=();
1695: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1696: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1697: }
1698: my %returnhash=();
1699: my %dumphash=
1700: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1701: my $now=time;
1702: foreach (keys %dumphash) {
1703: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1704: if (($tstart) && ($tstart<0)) { next; }
1705: if (($tend) && ($tend<$now)) { next; }
1706: if (($tstart) && ($now<$tstart)) { next; }
1707: my ($role,$username,$domain,$section)=split(/\:/,$_);
1708: if ($username eq '' || $domain eq '') { next; }
1709: if ((&privileged($username,$domain)) &&
1710: (!$nothide{$username.':'.$domain})) { next; }
1711: my $key=&plaintext($role);
1712: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1713: if ($returnhash{$key}) {
1714: $returnhash{$key}.=','.$username.':'.$domain;
1715: } else {
1716: $returnhash{$key}=$username.':'.$domain;
1717: }
1718: }
1719: return %returnhash;
1720: }
1721:
1722: sub get_my_roles {
1723: my ($uname,$udom)=@_;
1724: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1725: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1726: my %dumphash=
1727: &dump('nohist_userroles',$udom,$uname);
1728: my %returnhash=();
1729: my $now=time;
1730: foreach (keys %dumphash) {
1731: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1732: if (($tstart) && ($tstart<0)) { next; }
1733: if (($tend) && ($tend<$now)) { next; }
1734: if (($tstart) && ($now<$tstart)) { next; }
1735: my ($role,$username,$domain,$section)=split(/\:/,$_);
1736: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1737: }
1738: return %returnhash;
1739: }
1740:
1741: # ----------------------------------------------------- Frontpage Announcements
1742: #
1743: #
1744:
1745: sub postannounce {
1746: my ($server,$text)=@_;
1747: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1748: unless ($text=~/\w/) { $text=''; }
1749: return &reply('setannounce:'.&escape($text),$server);
1750: }
1751:
1752: sub getannounce {
1753:
1754: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1755: my $announcement='';
1756: while (<$fh>) { $announcement .=$_; }
1757: close($fh);
1758: if ($announcement=~/\w/) {
1759: return
1760: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1761: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1762: } else {
1763: return '';
1764: }
1765: } else {
1766: return '';
1767: }
1768: }
1769:
1770: # ---------------------------------------------------------- Course ID routines
1771: # Deal with domain's nohist_courseid.db files
1772: #
1773:
1774: sub courseidput {
1775: my ($domain,$what,$coursehome)=@_;
1776: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1777: }
1778:
1779: sub courseiddump {
1780: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$hostidflag,$hostidref)=@_;
1781: my %returnhash=();
1782: unless ($domfilter) { $domfilter=''; }
1783: foreach my $tryserver (keys %libserv) {
1784: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1785: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1786: foreach (
1787: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1788: $sincefilter.':'.&escape($descfilter).':'.
1789: &escape($instcodefilter).':'.&escape($ownerfilter),
1790: $tryserver))) {
1791: my ($key,$value)=split(/\=/,$_);
1792: if (($key) && ($value)) {
1793: $returnhash{&unescape($key)}=$value;
1794: }
1795: }
1796: }
1797: }
1798: }
1799: return %returnhash;
1800: }
1801:
1802: #
1803: # ----------------------------------------------------------- Check out an item
1804:
1805: sub get_first_access {
1806: my ($type,$argsymb)=@_;
1807: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1808: if ($argsymb) { $symb=$argsymb; }
1809: my ($map,$id,$res)=&decode_symb($symb);
1810: if ($type eq 'map') { $res=$map; }
1811: my %times=&get('firstaccesstimes',[$res],$udom,$uname);
1812: return $times{$res};
1813: }
1814:
1815: sub set_first_access {
1816: my ($type)=@_;
1817: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1818: my ($map,$id,$res)=&decode_symb($symb);
1819: if ($type eq 'map') { $res=$map; }
1820: my $firstaccess=&get_first_access($type);
1821: if (!$firstaccess) {
1822: return &put('firstaccesstimes',{$res=>time},$udom,$uname);
1823: }
1824: return 'already_set';
1825: }
1826:
1827: sub checkout {
1828: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1829: my $now=time;
1830: my $lonhost=$perlvar{'lonHostID'};
1831: my $infostr=&escape(
1832: 'CHECKOUTTOKEN&'.
1833: $tuname.'&'.
1834: $tudom.'&'.
1835: $tcrsid.'&'.
1836: $symb.'&'.
1837: $now.'&'.$ENV{'REMOTE_ADDR'});
1838: my $token=&reply('tmpput:'.$infostr,$lonhost);
1839: if ($token=~/^error\:/) {
1840: &logthis("<font color=blue>WARNING: ".
1841: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1842: "</font>");
1843: return '';
1844: }
1845:
1846: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1847: $token=~tr/a-z/A-Z/;
1848:
1849: my %infohash=('resource.0.outtoken' => $token,
1850: 'resource.0.checkouttime' => $now,
1851: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1852:
1853: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1854: return '';
1855: } else {
1856: &logthis("<font color=blue>WARNING: ".
1857: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1858: "</font>");
1859: }
1860:
1861: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1862: &escape('Checkout '.$infostr.' - '.
1863: $token)) ne 'ok') {
1864: return '';
1865: } else {
1866: &logthis("<font color=blue>WARNING: ".
1867: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1868: "</font>");
1869: }
1870: return $token;
1871: }
1872:
1873: # ------------------------------------------------------------ Check in an item
1874:
1875: sub checkin {
1876: my $token=shift;
1877: my $now=time;
1878: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1879: $lonhost=~tr/A-Z/a-z/;
1880: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1881: $dtoken=~s/\W/\_/g;
1882: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1883: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1884:
1885: unless (($tuname) && ($tudom)) {
1886: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1887: return '';
1888: }
1889:
1890: unless (&allowed('mgr',$tcrsid)) {
1891: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1892: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1893: return '';
1894: }
1895:
1896: my %infohash=('resource.0.intoken' => $token,
1897: 'resource.0.checkintime' => $now,
1898: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1899:
1900: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1901: return '';
1902: }
1903:
1904: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1905: &escape('Checkin - '.$token)) ne 'ok') {
1906: return '';
1907: }
1908:
1909: return ($symb,$tuname,$tudom,$tcrsid);
1910: }
1911:
1912: # --------------------------------------------- Set Expire Date for Spreadsheet
1913:
1914: sub expirespread {
1915: my ($uname,$udom,$stype,$usymb)=@_;
1916: my $cid=$ENV{'request.course.id'};
1917: if ($cid) {
1918: my $now=time;
1919: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1920: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1921: $ENV{'course.'.$cid.'.num'}.
1922: ':nohist_expirationdates:'.
1923: &escape($key).'='.$now,
1924: $ENV{'course.'.$cid.'.home'})
1925: }
1926: return 'ok';
1927: }
1928:
1929: # ----------------------------------------------------- Devalidate Spreadsheets
1930:
1931: sub devalidate {
1932: my ($symb,$uname,$udom)=@_;
1933: my $cid=$ENV{'request.course.id'};
1934: if ($cid) {
1935: # delete the stored spreadsheets for
1936: # - the student level sheet of this user in course's homespace
1937: # - the assessment level sheet for this resource
1938: # for this user in user's homespace
1939: # - current conditional state info
1940: my $key=$uname.':'.$udom.':';
1941: my $status=
1942: &del('nohist_calculatedsheets',
1943: [$key.'studentcalc:'],
1944: $ENV{'course.'.$cid.'.domain'},
1945: $ENV{'course.'.$cid.'.num'})
1946: .' '.
1947: &del('nohist_calculatedsheets_'.$cid,
1948: [$key.'assesscalc:'.$symb],$udom,$uname);
1949: unless ($status eq 'ok ok') {
1950: &logthis('Could not devalidate spreadsheet '.
1951: $uname.' at '.$udom.' for '.
1952: $symb.': '.$status);
1953: }
1954: &delenv('user.state.'.$cid);
1955: }
1956: }
1957:
1958: sub get_scalar {
1959: my ($string,$end) = @_;
1960: my $value;
1961: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1962: $value = $1;
1963: } elsif ($$string =~ s/^([^&]*?)&//) {
1964: $value = $1;
1965: }
1966: return &unescape($value);
1967: }
1968:
1969: sub array2str {
1970: my (@array) = @_;
1971: my $result=&arrayref2str(\@array);
1972: $result=~s/^__ARRAY_REF__//;
1973: $result=~s/__END_ARRAY_REF__$//;
1974: return $result;
1975: }
1976:
1977: sub arrayref2str {
1978: my ($arrayref) = @_;
1979: my $result='__ARRAY_REF__';
1980: foreach my $elem (@$arrayref) {
1981: if(ref($elem) eq 'ARRAY') {
1982: $result.=&arrayref2str($elem).'&';
1983: } elsif(ref($elem) eq 'HASH') {
1984: $result.=&hashref2str($elem).'&';
1985: } elsif(ref($elem)) {
1986: #print("Got a ref of ".(ref($elem))." skipping.");
1987: } else {
1988: $result.=&escape($elem).'&';
1989: }
1990: }
1991: $result=~s/\&$//;
1992: $result .= '__END_ARRAY_REF__';
1993: return $result;
1994: }
1995:
1996: sub hash2str {
1997: my (%hash) = @_;
1998: my $result=&hashref2str(\%hash);
1999: $result=~s/^__HASH_REF__//;
2000: $result=~s/__END_HASH_REF__$//;
2001: return $result;
2002: }
2003:
2004: sub hashref2str {
2005: my ($hashref)=@_;
2006: my $result='__HASH_REF__';
2007: foreach (sort(keys(%$hashref))) {
2008: if (ref($_) eq 'ARRAY') {
2009: $result.=&arrayref2str($_).'=';
2010: } elsif (ref($_) eq 'HASH') {
2011: $result.=&hashref2str($_).'=';
2012: } elsif (ref($_)) {
2013: $result.='=';
2014: #print("Got a ref of ".(ref($_))." skipping.");
2015: } else {
2016: if ($_) {$result.=&escape($_).'=';} else { last; }
2017: }
2018:
2019: if(ref($hashref->{$_}) eq 'ARRAY') {
2020: $result.=&arrayref2str($hashref->{$_}).'&';
2021: } elsif(ref($hashref->{$_}) eq 'HASH') {
2022: $result.=&hashref2str($hashref->{$_}).'&';
2023: } elsif(ref($hashref->{$_})) {
2024: $result.='&';
2025: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
2026: } else {
2027: $result.=&escape($hashref->{$_}).'&';
2028: }
2029: }
2030: $result=~s/\&$//;
2031: $result .= '__END_HASH_REF__';
2032: return $result;
2033: }
2034:
2035: sub str2hash {
2036: my ($string)=@_;
2037: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
2038: return %$hash;
2039: }
2040:
2041: sub str2hashref {
2042: my ($string) = @_;
2043:
2044: my %hash;
2045:
2046: if($string !~ /^__HASH_REF__/) {
2047: if (! ($string eq '' || !defined($string))) {
2048: $hash{'error'}='Not hash reference';
2049: }
2050: return (\%hash, $string);
2051: }
2052:
2053: $string =~ s/^__HASH_REF__//;
2054:
2055: while($string !~ /^__END_HASH_REF__/) {
2056: #key
2057: my $key='';
2058: if($string =~ /^__HASH_REF__/) {
2059: ($key, $string)=&str2hashref($string);
2060: if(defined($key->{'error'})) {
2061: $hash{'error'}='Bad data';
2062: return (\%hash, $string);
2063: }
2064: } elsif($string =~ /^__ARRAY_REF__/) {
2065: ($key, $string)=&str2arrayref($string);
2066: if($key->[0] eq 'Array reference error') {
2067: $hash{'error'}='Bad data';
2068: return (\%hash, $string);
2069: }
2070: } else {
2071: $string =~ s/^(.*?)=//;
2072: $key=&unescape($1);
2073: }
2074: $string =~ s/^=//;
2075:
2076: #value
2077: my $value='';
2078: if($string =~ /^__HASH_REF__/) {
2079: ($value, $string)=&str2hashref($string);
2080: if(defined($value->{'error'})) {
2081: $hash{'error'}='Bad data';
2082: return (\%hash, $string);
2083: }
2084: } elsif($string =~ /^__ARRAY_REF__/) {
2085: ($value, $string)=&str2arrayref($string);
2086: if($value->[0] eq 'Array reference error') {
2087: $hash{'error'}='Bad data';
2088: return (\%hash, $string);
2089: }
2090: } else {
2091: $value=&get_scalar(\$string,'__END_HASH_REF__');
2092: }
2093: $string =~ s/^&//;
2094:
2095: $hash{$key}=$value;
2096: }
2097:
2098: $string =~ s/^__END_HASH_REF__//;
2099:
2100: return (\%hash, $string);
2101: }
2102:
2103: sub str2array {
2104: my ($string)=@_;
2105: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
2106: return @$array;
2107: }
2108:
2109: sub str2arrayref {
2110: my ($string) = @_;
2111: my @array;
2112:
2113: if($string !~ /^__ARRAY_REF__/) {
2114: if (! ($string eq '' || !defined($string))) {
2115: $array[0]='Array reference error';
2116: }
2117: return (\@array, $string);
2118: }
2119:
2120: $string =~ s/^__ARRAY_REF__//;
2121:
2122: while($string !~ /^__END_ARRAY_REF__/) {
2123: my $value='';
2124: if($string =~ /^__HASH_REF__/) {
2125: ($value, $string)=&str2hashref($string);
2126: if(defined($value->{'error'})) {
2127: $array[0] ='Array reference error';
2128: return (\@array, $string);
2129: }
2130: } elsif($string =~ /^__ARRAY_REF__/) {
2131: ($value, $string)=&str2arrayref($string);
2132: if($value->[0] eq 'Array reference error') {
2133: $array[0] ='Array reference error';
2134: return (\@array, $string);
2135: }
2136: } else {
2137: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2138: }
2139: $string =~ s/^&//;
2140:
2141: push(@array, $value);
2142: }
2143:
2144: $string =~ s/^__END_ARRAY_REF__//;
2145:
2146: return (\@array, $string);
2147: }
2148:
2149: # -------------------------------------------------------------------Temp Store
2150:
2151: sub tmpreset {
2152: my ($symb,$namespace,$domain,$stuname) = @_;
2153: if (!$symb) {
2154: $symb=&symbread();
2155: if (!$symb) { $symb= $ENV{'request.url'}; }
2156: }
2157: $symb=escape($symb);
2158:
2159: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2160: $namespace=~s/\//\_/g;
2161: $namespace=~s/\W//g;
2162:
2163: #FIXME needs to do something for /pub resources
2164: if (!$domain) { $domain=$ENV{'user.domain'}; }
2165: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2166: my $path=$perlvar{'lonDaemons'}.'/tmp';
2167: my %hash;
2168: if (tie(%hash,'GDBM_File',
2169: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2170: &GDBM_WRCREAT(),0640)) {
2171: foreach my $key (keys %hash) {
2172: if ($key=~ /:$symb/) {
2173: delete($hash{$key});
2174: }
2175: }
2176: }
2177: }
2178:
2179: sub tmpstore {
2180: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2181:
2182: if (!$symb) {
2183: $symb=&symbread();
2184: if (!$symb) { $symb= $ENV{'request.url'}; }
2185: }
2186: $symb=escape($symb);
2187:
2188: if (!$namespace) {
2189: # I don't think we would ever want to store this for a course.
2190: # it seems this will only be used if we don't have a course.
2191: #$namespace=$ENV{'request.course.id'};
2192: #if (!$namespace) {
2193: $namespace=$ENV{'request.state'};
2194: #}
2195: }
2196: $namespace=~s/\//\_/g;
2197: $namespace=~s/\W//g;
2198: #FIXME needs to do something for /pub resources
2199: if (!$domain) { $domain=$ENV{'user.domain'}; }
2200: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2201: my $now=time;
2202: my %hash;
2203: my $path=$perlvar{'lonDaemons'}.'/tmp';
2204: if (tie(%hash,'GDBM_File',
2205: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2206: &GDBM_WRCREAT(),0640)) {
2207: $hash{"version:$symb"}++;
2208: my $version=$hash{"version:$symb"};
2209: my $allkeys='';
2210: foreach my $key (keys(%$storehash)) {
2211: $allkeys.=$key.':';
2212: $hash{"$version:$symb:$key"}=$$storehash{$key};
2213: }
2214: $hash{"$version:$symb:timestamp"}=$now;
2215: $allkeys.='timestamp';
2216: $hash{"$version:keys:$symb"}=$allkeys;
2217: if (untie(%hash)) {
2218: return 'ok';
2219: } else {
2220: return "error:$!";
2221: }
2222: } else {
2223: return "error:$!";
2224: }
2225: }
2226:
2227: # -----------------------------------------------------------------Temp Restore
2228:
2229: sub tmprestore {
2230: my ($symb,$namespace,$domain,$stuname) = @_;
2231:
2232: if (!$symb) {
2233: $symb=&symbread();
2234: if (!$symb) { $symb= $ENV{'request.url'}; }
2235: }
2236: $symb=escape($symb);
2237:
2238: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2239: #FIXME needs to do something for /pub resources
2240: if (!$domain) { $domain=$ENV{'user.domain'}; }
2241: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2242:
2243: my %returnhash;
2244: $namespace=~s/\//\_/g;
2245: $namespace=~s/\W//g;
2246: my %hash;
2247: my $path=$perlvar{'lonDaemons'}.'/tmp';
2248: if (tie(%hash,'GDBM_File',
2249: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2250: &GDBM_READER(),0640)) {
2251: my $version=$hash{"version:$symb"};
2252: $returnhash{'version'}=$version;
2253: my $scope;
2254: for ($scope=1;$scope<=$version;$scope++) {
2255: my $vkeys=$hash{"$scope:keys:$symb"};
2256: my @keys=split(/:/,$vkeys);
2257: my $key;
2258: $returnhash{"$scope:keys"}=$vkeys;
2259: foreach $key (@keys) {
2260: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
2261: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
2262: }
2263: }
2264: if (!(untie(%hash))) {
2265: return "error:$!";
2266: }
2267: } else {
2268: return "error:$!";
2269: }
2270: return %returnhash;
2271: }
2272:
2273: # ----------------------------------------------------------------------- Store
2274:
2275: sub store {
2276: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2277: my $home='';
2278:
2279: if ($stuname) { $home=&homeserver($stuname,$domain); }
2280:
2281: $symb=&symbclean($symb);
2282: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2283:
2284: if (!$domain) { $domain=$ENV{'user.domain'}; }
2285: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2286:
2287: &devalidate($symb,$stuname,$domain);
2288:
2289: $symb=escape($symb);
2290: if (!$namespace) {
2291: unless ($namespace=$ENV{'request.course.id'}) {
2292: return '';
2293: }
2294: }
2295: if (!$home) { $home=$ENV{'user.home'}; }
2296:
2297: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2298: $$storehash{'host'}=$perlvar{'lonHostID'};
2299:
2300: my $namevalue='';
2301: foreach (keys %$storehash) {
2302: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2303: }
2304: $namevalue=~s/\&$//;
2305: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2306: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2307: }
2308:
2309: # -------------------------------------------------------------- Critical Store
2310:
2311: sub cstore {
2312: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2313: my $home='';
2314:
2315: if ($stuname) { $home=&homeserver($stuname,$domain); }
2316:
2317: $symb=&symbclean($symb);
2318: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2319:
2320: if (!$domain) { $domain=$ENV{'user.domain'}; }
2321: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2322:
2323: &devalidate($symb,$stuname,$domain);
2324:
2325: $symb=escape($symb);
2326: if (!$namespace) {
2327: unless ($namespace=$ENV{'request.course.id'}) {
2328: return '';
2329: }
2330: }
2331: if (!$home) { $home=$ENV{'user.home'}; }
2332:
2333: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2334: $$storehash{'host'}=$perlvar{'lonHostID'};
2335:
2336: my $namevalue='';
2337: foreach (keys %$storehash) {
2338: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
2339: }
2340: $namevalue=~s/\&$//;
2341: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2342: return critical
2343: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2344: }
2345:
2346: # --------------------------------------------------------------------- Restore
2347:
2348: sub restore {
2349: my ($symb,$namespace,$domain,$stuname) = @_;
2350: my $home='';
2351:
2352: if ($stuname) { $home=&homeserver($stuname,$domain); }
2353:
2354: if (!$symb) {
2355: unless ($symb=escape(&symbread())) { return ''; }
2356: } else {
2357: $symb=&escape(&symbclean($symb));
2358: }
2359: if (!$namespace) {
2360: unless ($namespace=$ENV{'request.course.id'}) {
2361: return '';
2362: }
2363: }
2364: if (!$domain) { $domain=$ENV{'user.domain'}; }
2365: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2366: if (!$home) { $home=$ENV{'user.home'}; }
2367: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2368:
2369: my %returnhash=();
2370: foreach (split(/\&/,$answer)) {
2371: my ($name,$value)=split(/\=/,$_);
2372: $returnhash{&unescape($name)}=&unescape($value);
2373: }
2374: my $version;
2375: for ($version=1;$version<=$returnhash{'version'};$version++) {
2376: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2377: $returnhash{$_}=$returnhash{$version.':'.$_};
2378: }
2379: }
2380: return %returnhash;
2381: }
2382:
2383: # ---------------------------------------------------------- Course Description
2384:
2385: sub coursedescription {
2386: my $courseid=shift;
2387: $courseid=~s/^\///;
2388: $courseid=~s/\_/\//g;
2389: my ($cdomain,$cnum)=split(/\//,$courseid);
2390: my $chome=&homeserver($cnum,$cdomain);
2391: my $normalid=$cdomain.'_'.$cnum;
2392: # need to always cache even if we get errors otherwise we keep
2393: # trying and trying and trying to get the course description.
2394: my %envhash=();
2395: my %returnhash=();
2396: $envhash{'course.'.$normalid.'.last_cache'}=time;
2397: if ($chome ne 'no_host') {
2398: %returnhash=&dump('environment',$cdomain,$cnum);
2399: if (!exists($returnhash{'con_lost'})) {
2400: $returnhash{'home'}= $chome;
2401: $returnhash{'domain'} = $cdomain;
2402: $returnhash{'num'} = $cnum;
2403: while (my ($name,$value) = each %returnhash) {
2404: $envhash{'course.'.$normalid.'.'.$name}=$value;
2405: }
2406: $returnhash{'url'}=&clutter($returnhash{'url'});
2407: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2408: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2409: $envhash{'course.'.$normalid.'.home'}=$chome;
2410: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2411: $envhash{'course.'.$normalid.'.num'}=$cnum;
2412: }
2413: }
2414: &appenv(%envhash);
2415: return %returnhash;
2416: }
2417:
2418: # -------------------------------------------------See if a user is privileged
2419:
2420: sub privileged {
2421: my ($username,$domain)=@_;
2422: my $rolesdump=&reply("dump:$domain:$username:roles",
2423: &homeserver($username,$domain));
2424: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2425: my $now=time;
2426: if ($rolesdump ne '') {
2427: foreach (split(/&/,$rolesdump)) {
2428: if ($_!~/^rolesdef_/) {
2429: my ($area,$role)=split(/=/,$_);
2430: $area=~s/\_\w\w$//;
2431: my ($trole,$tend,$tstart)=split(/_/,$role);
2432: if (($trole eq 'dc') || ($trole eq 'su')) {
2433: my $active=1;
2434: if ($tend) {
2435: if ($tend<$now) { $active=0; }
2436: }
2437: if ($tstart) {
2438: if ($tstart>$now) { $active=0; }
2439: }
2440: if ($active) { return 1; }
2441: }
2442: }
2443: }
2444: }
2445: return 0;
2446: }
2447:
2448: # -------------------------------------------------------- Get user privileges
2449:
2450: sub rolesinit {
2451: my ($domain,$username,$authhost)=@_;
2452: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2453: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2454: my %allroles=();
2455: my $now=time;
2456: my $userroles="user.login.time=$now\n";
2457:
2458: if ($rolesdump ne '') {
2459: foreach (split(/&/,$rolesdump)) {
2460: if ($_!~/^rolesdef_/) {
2461: my ($area,$role)=split(/=/,$_);
2462: $area=~s/\_\w\w$//;
2463:
2464: my ($trole,$tend,$tstart);
2465: if ($role=~/^cr/) {
2466: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2467: ($tend,$tstart)=split('_',$trest);
2468: } else {
2469: ($trole,$tend,$tstart)=split(/_/,$role);
2470: }
2471: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2472: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2473: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2474: if (($area ne '') && ($trole ne '')) {
2475: my $spec=$trole.'.'.$area;
2476: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2477: if ($trole =~ /^cr\//) {
2478: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2479: } else {
2480: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2481: }
2482: }
2483: }
2484: }
2485: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles);
2486: $userroles.='user.adv='.$adv."\n".
2487: 'user.author='.$author."\n";
2488: $ENV{'user.adv'}=$adv;
2489: }
2490: return $userroles;
2491: }
2492:
2493: sub set_arearole {
2494: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2495: # log the associated role with the area
2496: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2497: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2498: }
2499:
2500: sub custom_roleprivs {
2501: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2502: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2503: my $homsvr=homeserver($rauthor,$rdomain);
2504: if ($hostname{$homsvr} ne '') {
2505: my ($rdummy,$roledef)=
2506: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2507: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2508: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2509: if (defined($syspriv)) {
2510: $$allroles{'cm./'}.=':'.$syspriv;
2511: $$allroles{$spec.'./'}.=':'.$syspriv;
2512: }
2513: if ($tdomain ne '') {
2514: if (defined($dompriv)) {
2515: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2516: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2517: }
2518: if (($trest ne '') && (defined($coursepriv))) {
2519: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2520: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2521: }
2522: }
2523: }
2524: }
2525: }
2526:
2527:
2528: sub standard_roleprivs {
2529: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2530: if (defined($pr{$trole.':s'})) {
2531: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2532: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2533: }
2534: if ($tdomain ne '') {
2535: if (defined($pr{$trole.':d'})) {
2536: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2537: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2538: }
2539: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2540: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2541: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2542: }
2543: }
2544: }
2545:
2546: sub set_userprivs {
2547: my ($userroles,$allroles) = @_;
2548: my $author=0;
2549: my $adv=0;
2550: foreach (keys %{$allroles}) {
2551: my %thesepriv=();
2552: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2553: foreach (split(/:/,$$allroles{$_})) {
2554: if ($_ ne '') {
2555: my ($privilege,$restrictions)=split(/&/,$_);
2556: if ($restrictions eq '') {
2557: $thesepriv{$privilege}='F';
2558: } elsif ($thesepriv{$privilege} ne 'F') {
2559: $thesepriv{$privilege}.=$restrictions;
2560: }
2561: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2562: }
2563: }
2564: my $thesestr='';
2565: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2566: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2567: }
2568: return ($author,$adv);
2569: }
2570:
2571: # --------------------------------------------------------------- get interface
2572:
2573: sub get {
2574: my ($namespace,$storearr,$udomain,$uname)=@_;
2575: my $items='';
2576: foreach (@$storearr) {
2577: $items.=escape($_).'&';
2578: }
2579: $items=~s/\&$//;
2580: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2581: if (!$uname) { $uname=$ENV{'user.name'}; }
2582: my $uhome=&homeserver($uname,$udomain);
2583:
2584: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2585: my @pairs=split(/\&/,$rep);
2586: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2587: return @pairs;
2588: }
2589: my %returnhash=();
2590: my $i=0;
2591: foreach (@$storearr) {
2592: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2593: $i++;
2594: }
2595: return %returnhash;
2596: }
2597:
2598: # --------------------------------------------------------------- del interface
2599:
2600: sub del {
2601: my ($namespace,$storearr,$udomain,$uname)=@_;
2602: my $items='';
2603: foreach (@$storearr) {
2604: $items.=escape($_).'&';
2605: }
2606: $items=~s/\&$//;
2607: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2608: if (!$uname) { $uname=$ENV{'user.name'}; }
2609: my $uhome=&homeserver($uname,$udomain);
2610:
2611: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2612: }
2613:
2614: # -------------------------------------------------------------- dump interface
2615:
2616: sub dump {
2617: my ($namespace,$udomain,$uname,$regexp)=@_;
2618: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2619: if (!$uname) { $uname=$ENV{'user.name'}; }
2620: my $uhome=&homeserver($uname,$udomain);
2621: if ($regexp) {
2622: $regexp=&escape($regexp);
2623: } else {
2624: $regexp='.';
2625: }
2626: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2627: my @pairs=split(/\&/,$rep);
2628: my %returnhash=();
2629: foreach (@pairs) {
2630: my ($key,$value)=split(/=/,$_);
2631: $returnhash{unescape($key)}=&thaw_unescape($value);
2632: }
2633: return %returnhash;
2634: }
2635:
2636: # -------------------------------------------------------------- keys interface
2637:
2638: sub getkeys {
2639: my ($namespace,$udomain,$uname)=@_;
2640: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2641: if (!$uname) { $uname=$ENV{'user.name'}; }
2642: my $uhome=&homeserver($uname,$udomain);
2643: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2644: my @keyarray=();
2645: foreach (split(/\&/,$rep)) {
2646: push (@keyarray,&unescape($_));
2647: }
2648: return @keyarray;
2649: }
2650:
2651: # --------------------------------------------------------------- currentdump
2652: sub currentdump {
2653: my ($courseid,$sdom,$sname)=@_;
2654: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2655: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2656: $sname = $ENV{'user.name'} if (! defined($sname));
2657: my $uhome = &homeserver($sname,$sdom);
2658: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2659: return if ($rep =~ /^(error:|no_such_host)/);
2660: #
2661: my %returnhash=();
2662: #
2663: if ($rep eq "unknown_cmd") {
2664: # an old lond will not know currentdump
2665: # Do a dump and make it look like a currentdump
2666: my @tmp = &dump($courseid,$sdom,$sname,'.');
2667: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2668: my %hash = @tmp;
2669: @tmp=();
2670: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2671: } else {
2672: my @pairs=split(/\&/,$rep);
2673: foreach (@pairs) {
2674: my ($key,$value)=split(/=/,$_);
2675: my ($symb,$param) = split(/:/,$key);
2676: $returnhash{&unescape($symb)}->{&unescape($param)} =
2677: &thaw_unescape($value);
2678: }
2679: }
2680: return %returnhash;
2681: }
2682:
2683: sub convert_dump_to_currentdump{
2684: my %hash = %{shift()};
2685: my %returnhash;
2686: # Code ripped from lond, essentially. The only difference
2687: # here is the unescaping done by lonnet::dump(). Conceivably
2688: # we might run in to problems with parameter names =~ /^v\./
2689: while (my ($key,$value) = each(%hash)) {
2690: my ($v,$symb,$param) = split(/:/,$key);
2691: next if ($v eq 'version' || $symb eq 'keys');
2692: next if (exists($returnhash{$symb}) &&
2693: exists($returnhash{$symb}->{$param}) &&
2694: $returnhash{$symb}->{'v.'.$param} > $v);
2695: $returnhash{$symb}->{$param}=$value;
2696: $returnhash{$symb}->{'v.'.$param}=$v;
2697: }
2698: #
2699: # Remove all of the keys in the hashes which keep track of
2700: # the version of the parameter.
2701: while (my ($symb,$param_hash) = each(%returnhash)) {
2702: # use a foreach because we are going to delete from the hash.
2703: foreach my $key (keys(%$param_hash)) {
2704: delete($param_hash->{$key}) if ($key =~ /^v\./);
2705: }
2706: }
2707: return \%returnhash;
2708: }
2709:
2710: # --------------------------------------------------------------- inc interface
2711:
2712: sub inc {
2713: my ($namespace,$store,$udomain,$uname) = @_;
2714: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2715: if (!$uname) { $uname=$ENV{'user.name'}; }
2716: my $uhome=&homeserver($uname,$udomain);
2717: my $items='';
2718: if (! ref($store)) {
2719: # got a single value, so use that instead
2720: $items = &escape($store).'=&';
2721: } elsif (ref($store) eq 'SCALAR') {
2722: $items = &escape($$store).'=&';
2723: } elsif (ref($store) eq 'ARRAY') {
2724: $items = join('=&',map {&escape($_);} @{$store});
2725: } elsif (ref($store) eq 'HASH') {
2726: while (my($key,$value) = each(%{$store})) {
2727: $items.= &escape($key).'='.&escape($value).'&';
2728: }
2729: }
2730: $items=~s/\&$//;
2731: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2732: }
2733:
2734: # --------------------------------------------------------------- put interface
2735:
2736: sub put {
2737: my ($namespace,$storehash,$udomain,$uname)=@_;
2738: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2739: if (!$uname) { $uname=$ENV{'user.name'}; }
2740: my $uhome=&homeserver($uname,$udomain);
2741: my $items='';
2742: foreach (keys %$storehash) {
2743: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2744: }
2745: $items=~s/\&$//;
2746: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2747: }
2748:
2749: # ---------------------------------------------------------- putstore interface
2750:
2751: sub putstore {
2752: my ($namespace,$storehash,$udomain,$uname)=@_;
2753: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2754: if (!$uname) { $uname=$ENV{'user.name'}; }
2755: my $uhome=&homeserver($uname,$udomain);
2756: my $items='';
2757: my %allitems = ();
2758: foreach (keys %$storehash) {
2759: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2760: my $key = $1.':keys:'.$2;
2761: $allitems{$key} .= $3.':';
2762: }
2763: $items.=$_.'='.&escape($$storehash{$_}).'&';
2764: }
2765: foreach (keys %allitems) {
2766: $allitems{$_} =~ s/\:$//;
2767: $items.= $_.'='.$allitems{$_}.'&';
2768: }
2769: $items=~s/\&$//;
2770: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2771: }
2772:
2773: # ------------------------------------------------------ critical put interface
2774:
2775: sub cput {
2776: my ($namespace,$storehash,$udomain,$uname)=@_;
2777: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2778: if (!$uname) { $uname=$ENV{'user.name'}; }
2779: my $uhome=&homeserver($uname,$udomain);
2780: my $items='';
2781: foreach (keys %$storehash) {
2782: $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2783: }
2784: $items=~s/\&$//;
2785: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2786: }
2787:
2788: # -------------------------------------------------------------- eget interface
2789:
2790: sub eget {
2791: my ($namespace,$storearr,$udomain,$uname)=@_;
2792: my $items='';
2793: foreach (@$storearr) {
2794: $items.=escape($_).'&';
2795: }
2796: $items=~s/\&$//;
2797: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2798: if (!$uname) { $uname=$ENV{'user.name'}; }
2799: my $uhome=&homeserver($uname,$udomain);
2800: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2801: my @pairs=split(/\&/,$rep);
2802: my %returnhash=();
2803: my $i=0;
2804: foreach (@$storearr) {
2805: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2806: $i++;
2807: }
2808: return %returnhash;
2809: }
2810:
2811: # ---------------------------------------------- Custom access rule evaluation
2812:
2813: sub customaccess {
2814: my ($priv,$uri)=@_;
2815: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2816: $urealm=~s/^\W//;
2817: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2818: my $access=0;
2819: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2820: my ($effect,$realm,$role)=split(/\:/,$_);
2821: if ($role) {
2822: if ($role ne $urole) { next; }
2823: }
2824: foreach (split(/\s*\,\s*/,$realm)) {
2825: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2826: if ($tdom) {
2827: if ($tdom ne $udom) { next; }
2828: }
2829: if ($tcrs) {
2830: if ($tcrs ne $ucrs) { next; }
2831: }
2832: if ($tsec) {
2833: if ($tsec ne $usec) { next; }
2834: }
2835: $access=($effect eq 'allow');
2836: last;
2837: }
2838: if ($realm eq '' && $role eq '') {
2839: $access=($effect eq 'allow');
2840: }
2841: }
2842: return $access;
2843: }
2844:
2845: # ------------------------------------------------- Check for a user privilege
2846:
2847: sub allowed {
2848: my ($priv,$uri,$symb)=@_;
2849: $uri=&deversion($uri);
2850: my $orguri=$uri;
2851: $uri=&declutter($uri);
2852:
2853:
2854:
2855: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2856: # Free bre access to adm and meta resources
2857: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
2858: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2859: return 'F';
2860: }
2861:
2862: # Free bre access to user's own portfolio contents
2863: my ($space,$domain,$name,$dir)=split('/',$uri);
2864: if (('uploaded' eq $space) && ($ENV{'user.name'} eq $name) &&
2865: ($ENV{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
2866: return 'F';
2867: }
2868:
2869: # Free bre to public access
2870:
2871: if ($priv eq 'bre') {
2872: my $copyright=&metadata($uri,'copyright');
2873: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2874: return 'F';
2875: }
2876: if ($copyright eq 'priv') {
2877: $uri=~/([^\/]+)\/([^\/]+)\//;
2878: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2879: return '';
2880: }
2881: }
2882: if ($copyright eq 'domain') {
2883: $uri=~/([^\/]+)\/([^\/]+)\//;
2884: unless (($ENV{'user.domain'} eq $1) ||
2885: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2886: return '';
2887: }
2888: }
2889: if ($ENV{'request.role'}=~ /li\.\//) {
2890: # Library role, so allow browsing of resources in this domain.
2891: return 'F';
2892: }
2893: if ($copyright eq 'custom') {
2894: unless (&customaccess($priv,$uri)) { return ''; }
2895: }
2896: }
2897: # Domain coordinator is trying to create a course
2898: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2899: # uri is the requested domain in this case.
2900: # comparison to 'request.role.domain' shows if the user has selected
2901: # a role of dc for the domain in question.
2902: return 'F' if ($uri eq $ENV{'request.role.domain'});
2903: }
2904:
2905: my $thisallowed='';
2906: my $statecond=0;
2907: my $courseprivid='';
2908:
2909: # Course
2910:
2911: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
2912: $thisallowed.=$1;
2913: }
2914:
2915: # Domain
2916:
2917: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2918: =~/\Q$priv\E\&([^\:]*)/) {
2919: $thisallowed.=$1;
2920: }
2921:
2922: # Course: uri itself is a course
2923: my $courseuri=$uri;
2924: $courseuri=~s/\_(\d)/\/$1/;
2925: $courseuri=~s/^([^\/])/\/$1/;
2926:
2927: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2928: =~/\Q$priv\E\&([^\:]*)/) {
2929: $thisallowed.=$1;
2930: }
2931:
2932: # URI is an uploaded document for this course
2933:
2934: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
2935: my $refuri=$ENV{'httpref.'.$orguri};
2936: if ($refuri) {
2937: if ($refuri =~ m|^/adm/|) {
2938: $thisallowed='F';
2939: }
2940: }
2941: }
2942:
2943: # Full access at system, domain or course-wide level? Exit.
2944:
2945: if ($thisallowed=~/F/) {
2946: return 'F';
2947: }
2948:
2949: # If this is generating or modifying users, exit with special codes
2950:
2951: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
2952: return $thisallowed;
2953: }
2954: #
2955: # Gathered so far: system, domain and course wide privileges
2956: #
2957: # Course: See if uri or referer is an individual resource that is part of
2958: # the course
2959:
2960: if ($ENV{'request.course.id'}) {
2961:
2962: $courseprivid=$ENV{'request.course.id'};
2963: if ($ENV{'request.course.sec'}) {
2964: $courseprivid.='/'.$ENV{'request.course.sec'};
2965: }
2966: $courseprivid=~s/\_/\//;
2967: my $checkreferer=1;
2968: my ($match,$cond)=&is_on_map($uri);
2969: if ($match) {
2970: $statecond=$cond;
2971: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2972: =~/\Q$priv\E\&([^\:]*)/) {
2973: $thisallowed.=$1;
2974: $checkreferer=0;
2975: }
2976: }
2977:
2978: if ($checkreferer) {
2979: my $refuri=$ENV{'httpref.'.$orguri};
2980: unless ($refuri) {
2981: foreach (keys %ENV) {
2982: if ($_=~/^httpref\..*\*/) {
2983: my $pattern=$_;
2984: $pattern=~s/^httpref\.\/res\///;
2985: $pattern=~s/\*/\[\^\/\]\+/g;
2986: $pattern=~s/\//\\\//g;
2987: if ($orguri=~/$pattern/) {
2988: $refuri=$ENV{$_};
2989: }
2990: }
2991: }
2992: }
2993:
2994: if ($refuri) {
2995: $refuri=&declutter($refuri);
2996: my ($match,$cond)=&is_on_map($refuri);
2997: if ($match) {
2998: my $refstatecond=$cond;
2999: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
3000: =~/\Q$priv\E\&([^\:]*)/) {
3001: $thisallowed.=$1;
3002: $uri=$refuri;
3003: $statecond=$refstatecond;
3004: }
3005: }
3006: }
3007: }
3008: }
3009:
3010: #
3011: # Gathered now: all privileges that could apply, and condition number
3012: #
3013: #
3014: # Full or no access?
3015: #
3016:
3017: if ($thisallowed=~/F/) {
3018: return 'F';
3019: }
3020:
3021: unless ($thisallowed) {
3022: return '';
3023: }
3024:
3025: # Restrictions exist, deal with them
3026: #
3027: # C:according to course preferences
3028: # R:according to resource settings
3029: # L:unless locked
3030: # X:according to user session state
3031: #
3032:
3033: # Possibly locked functionality, check all courses
3034: # Locks might take effect only after 10 minutes cache expiration for other
3035: # courses, and 2 minutes for current course
3036:
3037: my $envkey;
3038: if ($thisallowed=~/L/) {
3039: foreach $envkey (keys %ENV) {
3040: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
3041: my $courseid=$2;
3042: my $roleid=$1.'.'.$2;
3043: $courseid=~s/^\///;
3044: my $expiretime=600;
3045: if ($ENV{'request.role'} eq $roleid) {
3046: $expiretime=120;
3047: }
3048: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
3049: my $prefix='course.'.$cdom.'_'.$cnum.'.';
3050: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
3051: &coursedescription($courseid);
3052: }
3053: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
3054: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
3055: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
3056: &log($ENV{'user.domain'},$ENV{'user.name'},
3057: $ENV{'user.home'},
3058: 'Locked by res: '.$priv.' for '.$uri.' due to '.
3059: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3060: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
3061: return '';
3062: }
3063: }
3064: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
3065: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
3066: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
3067: &log($ENV{'user.domain'},$ENV{'user.name'},
3068: $ENV{'user.home'},
3069: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
3070: $cdom.'/'.$cnum.'/'.$csec.' expire '.
3071: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
3072: return '';
3073: }
3074: }
3075: }
3076: }
3077: }
3078:
3079: #
3080: # Rest of the restrictions depend on selected course
3081: #
3082:
3083: unless ($ENV{'request.course.id'}) {
3084: return '1';
3085: }
3086:
3087: #
3088: # Now user is definitely in a course
3089: #
3090:
3091:
3092: # Course preferences
3093:
3094: if ($thisallowed=~/C/) {
3095: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
3096: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
3097: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
3098: =~/\Q$rolecode\E/) {
3099: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3100: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
3101: $ENV{'request.course.id'});
3102: return '';
3103: }
3104:
3105: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
3106: =~/\Q$unamedom\E/) {
3107: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3108: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
3109: $ENV{'request.course.id'});
3110: return '';
3111: }
3112: }
3113:
3114: # Resource preferences
3115:
3116: if ($thisallowed=~/R/) {
3117: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
3118: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
3119: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
3120: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
3121: return '';
3122: }
3123: }
3124:
3125: # Restricted by state or randomout?
3126:
3127: if ($thisallowed=~/X/) {
3128: if ($ENV{'acc.randomout'}) {
3129: if (!$symb) { $symb=&symbread($uri,1); }
3130: if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
3131: return '';
3132: }
3133: }
3134: if (&condval($statecond)) {
3135: return '2';
3136: } else {
3137: return '';
3138: }
3139: }
3140:
3141: return 'F';
3142: }
3143:
3144: # --------------------------------------------------- Is a resource on the map?
3145:
3146: sub is_on_map {
3147: my $uri=&declutter(shift);
3148: $uri=~s/\.\d+\.(\w+)$/\.$1/;
3149: my @uriparts=split(/\//,$uri);
3150: my $filename=$uriparts[$#uriparts];
3151: my $pathname=$uri;
3152: $pathname=~s|/\Q$filename\E$||;
3153: $pathname=~s/^adm\/wrapper\///;
3154: #Trying to find the conditional for the file
3155: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
3156: /\&\Q$filename\E\:([\d\|]+)\&/);
3157: if ($match) {
3158: return (1,$1);
3159: } else {
3160: return (0,0);
3161: }
3162: }
3163:
3164: # --------------------------------------------------------- Get symb from alias
3165:
3166: sub get_symb_from_alias {
3167: my $symb=shift;
3168: my ($map,$resid,$url)=&decode_symb($symb);
3169: # Already is a symb
3170: if ($url) { return $symb; }
3171: # Must be an alias
3172: my $aliassymb='';
3173: my %bighash;
3174: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3175: &GDBM_READER(),0640)) {
3176: my $rid=$bighash{'mapalias_'.$symb};
3177: if ($rid) {
3178: my ($mapid,$resid)=split(/\./,$rid);
3179: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3180: $resid,$bighash{'src_'.$rid});
3181: }
3182: untie %bighash;
3183: }
3184: return $aliassymb;
3185: }
3186:
3187: # ----------------------------------------------------------------- Define Role
3188:
3189: sub definerole {
3190: if (allowed('mcr','/')) {
3191: my ($rolename,$sysrole,$domrole,$courole)=@_;
3192: foreach (split(':',$sysrole)) {
3193: my ($crole,$cqual)=split(/\&/,$_);
3194: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3195: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3196: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3197: return "refused:s:$crole&$cqual";
3198: }
3199: }
3200: }
3201: foreach (split(':',$domrole)) {
3202: my ($crole,$cqual)=split(/\&/,$_);
3203: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3204: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3205: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3206: return "refused:d:$crole&$cqual";
3207: }
3208: }
3209: }
3210: foreach (split(':',$courole)) {
3211: my ($crole,$cqual)=split(/\&/,$_);
3212: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3213: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3214: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3215: return "refused:c:$crole&$cqual";
3216: }
3217: }
3218: }
3219: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3220: "$ENV{'user.domain'}:$ENV{'user.name'}:".
3221: "rolesdef_$rolename=".
3222: escape($sysrole.'_'.$domrole.'_'.$courole);
3223: return reply($command,$ENV{'user.home'});
3224: } else {
3225: return 'refused';
3226: }
3227: }
3228:
3229: # ---------------- Make a metadata query against the network of library servers
3230:
3231: sub metadata_query {
3232: my ($query,$custom,$customshow,$server_array)=@_;
3233: my %rhash;
3234: my @server_list = (defined($server_array) ? @$server_array
3235: : keys(%libserv) );
3236: for my $server (@server_list) {
3237: unless ($custom or $customshow) {
3238: my $reply=&reply("querysend:".&escape($query),$server);
3239: $rhash{$server}=$reply;
3240: }
3241: else {
3242: my $reply=&reply("querysend:".&escape($query).':'.
3243: &escape($custom).':'.&escape($customshow),
3244: $server);
3245: $rhash{$server}=$reply;
3246: }
3247: }
3248: return \%rhash;
3249: }
3250:
3251: # ----------------------------------------- Send log queries and wait for reply
3252:
3253: sub log_query {
3254: my ($uname,$udom,$query,%filters)=@_;
3255: my $uhome=&homeserver($uname,$udom);
3256: if ($uhome eq 'no_host') { return 'error: no_host'; }
3257: my $uhost=$hostname{$uhome};
3258: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3259: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3260: $uhome);
3261: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3262: return get_query_reply($queryid);
3263: }
3264:
3265: # ------- Request retrieval of institutional classlists for course(s)
3266:
3267: sub fetch_enrollment_query {
3268: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3269: my $homeserver;
3270: my $maxtries = 1;
3271: if ($context eq 'automated') {
3272: $homeserver = $perlvar{'lonHostID'};
3273: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3274: } else {
3275: $homeserver = &homeserver($cnum,$dom);
3276: }
3277: my $host=$hostname{$homeserver};
3278: my $cmd = '';
3279: foreach (keys %{$affiliatesref}) {
3280: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3281: }
3282: $cmd =~ s/%%$//;
3283: $cmd = &escape($cmd);
3284: my $query = 'fetchenrollment';
3285: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$ENV{'user.name'}.':'.$cmd,$homeserver);
3286: unless ($queryid=~/^\Q$host\E\_/) {
3287: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3288: return 'error: '.$queryid;
3289: }
3290: my $reply = &get_query_reply($queryid);
3291: my $tries = 1;
3292: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3293: $reply = &get_query_reply($queryid);
3294: $tries ++;
3295: }
3296: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3297: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$ENV{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3298: } else {
3299: my @responses = split/:/,$reply;
3300: if ($homeserver eq $perlvar{'lonHostID'}) {
3301: foreach (@responses) {
3302: my ($key,$value) = split/=/,$_;
3303: $$replyref{$key} = $value;
3304: }
3305: } else {
3306: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3307: foreach (@responses) {
3308: my ($key,$value) = split/=/,$_;
3309: $$replyref{$key} = $value;
3310: if ($value > 0) {
3311: foreach (@{$$affiliatesref{$key}}) {
3312: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3313: my $destname = $pathname.'/'.$filename;
3314: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3315: if ($xml_classlist =~ /^error/) {
3316: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3317: } else {
3318: if ( open(FILE,">$destname") ) {
3319: print FILE &unescape($xml_classlist);
3320: close(FILE);
3321: } else {
3322: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3323: }
3324: }
3325: }
3326: }
3327: }
3328: }
3329: return 'ok';
3330: }
3331: return 'error';
3332: }
3333:
3334: sub get_query_reply {
3335: my $queryid=shift;
3336: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3337: my $reply='';
3338: for (1..100) {
3339: sleep 2;
3340: if (-e $replyfile.'.end') {
3341: if (open(my $fh,$replyfile)) {
3342: $reply.=<$fh>;
3343: close($fh);
3344: } else { return 'error: reply_file_error'; }
3345: return &unescape($reply);
3346: }
3347: }
3348: return 'timeout:'.$queryid;
3349: }
3350:
3351: sub courselog_query {
3352: #
3353: # possible filters:
3354: # url: url or symb
3355: # username
3356: # domain
3357: # action: view, submit, grade
3358: # start: timestamp
3359: # end: timestamp
3360: #
3361: my (%filters)=@_;
3362: unless ($ENV{'request.course.id'}) { return 'no_course'; }
3363: if ($filters{'url'}) {
3364: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3365: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3366: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3367: }
3368: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
3369: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
3370: return &log_query($cname,$cdom,'courselog',%filters);
3371: }
3372:
3373: sub userlog_query {
3374: my ($uname,$udom,%filters)=@_;
3375: return &log_query($uname,$udom,'userlog',%filters);
3376: }
3377:
3378: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3379:
3380: sub auto_run {
3381: my ($cnum,$cdom) = @_;
3382: my $homeserver = &homeserver($cnum,$cdom);
3383: my $response = &reply('autorun:'.$cdom,$homeserver);
3384: return $response;
3385: }
3386:
3387: sub auto_get_sections {
3388: my ($cnum,$cdom,$inst_coursecode) = @_;
3389: my $homeserver = &homeserver($cnum,$cdom);
3390: my @secs = ();
3391: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3392: unless ($response eq 'refused') {
3393: @secs = split/:/,$response;
3394: }
3395: return @secs;
3396: }
3397:
3398: sub auto_new_course {
3399: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3400: my $homeserver = &homeserver($cnum,$cdom);
3401: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3402: return $response;
3403: }
3404:
3405: sub auto_validate_courseID {
3406: my ($cnum,$cdom,$inst_course_id) = @_;
3407: my $homeserver = &homeserver($cnum,$cdom);
3408: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3409: return $response;
3410: }
3411:
3412: sub auto_create_password {
3413: my ($cnum,$cdom,$authparam) = @_;
3414: my $homeserver = &homeserver($cnum,$cdom);
3415: my $create_passwd = 0;
3416: my $authchk = '';
3417: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3418: if ($response eq 'refused') {
3419: $authchk = 'refused';
3420: } else {
3421: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3422: }
3423: return ($authparam,$create_passwd,$authchk);
3424: }
3425:
3426: sub auto_instcode_format {
3427: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3428: my $courses = '';
3429: my $homeserver;
3430: if ($caller eq 'global') {
3431: foreach my $tryserver (keys %libserv) {
3432: if ($hostdom{$tryserver} eq $codedom) {
3433: $homeserver = $tryserver;
3434: last;
3435: }
3436: }
3437: if (($ENV{'user.name'}) && ($ENV{'user.domain'} eq $codedom)) {
3438: $homeserver = &homeserver($ENV{'user.name'},$codedom);
3439: }
3440: } else {
3441: $homeserver = &homeserver($caller,$codedom);
3442: }
3443: foreach (keys %{$instcodes}) {
3444: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3445: }
3446: chop($courses);
3447: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3448: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3449: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3450: %{$codes} = &str2hash($codes_str);
3451: @{$codetitles} = &str2array($codetitles_str);
3452: %{$cat_titles} = &str2hash($cat_titles_str);
3453: %{$cat_order} = &str2hash($cat_order_str);
3454: return 'ok';
3455: }
3456: return $response;
3457: }
3458:
3459: # ------------------------------------------------------------------ Plain Text
3460:
3461: sub plaintext {
3462: my $short=shift;
3463: return &mt($prp{$short});
3464: }
3465:
3466: # ----------------------------------------------------------------- Assign Role
3467:
3468: sub assignrole {
3469: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3470: my $mrole;
3471: if ($role =~ /^cr\//) {
3472: my $cwosec=$url;
3473: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3474: unless (&allowed('ccr',$cwosec)) {
3475: &logthis('Refused custom assignrole: '.
3476: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3477: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3478: return 'refused';
3479: }
3480: $mrole='cr';
3481: } else {
3482: my $cwosec=$url;
3483: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3484: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3485: &logthis('Refused assignrole: '.
3486: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3487: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3488: return 'refused';
3489: }
3490: $mrole=$role;
3491: }
3492: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3493: "$udom:$uname:$url".'_'."$mrole=$role";
3494: if ($end) { $command.='_'.$end; }
3495: if ($start) {
3496: if ($end) {
3497: $command.='_'.$start;
3498: } else {
3499: $command.='_0_'.$start;
3500: }
3501: }
3502: # actually delete
3503: if ($deleteflag) {
3504: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3505: # modify command to delete the role
3506: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
3507: "$udom:$uname:$url".'_'."$mrole";
3508: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
3509: # set start and finish to negative values for userrolelog
3510: $start=-1;
3511: $end=-1;
3512: }
3513: }
3514: # send command
3515: my $answer=&reply($command,&homeserver($uname,$udom));
3516: # log new user role if status is ok
3517: if ($answer eq 'ok') {
3518: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3519: }
3520: return $answer;
3521: }
3522:
3523: # -------------------------------------------------- Modify user authentication
3524: # Overrides without validation
3525:
3526: sub modifyuserauth {
3527: my ($udom,$uname,$umode,$upass)=@_;
3528: my $uhome=&homeserver($uname,$udom);
3529: unless (&allowed('mau',$udom)) { return 'refused'; }
3530: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3531: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3532: ' in domain '.$ENV{'request.role.domain'});
3533: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3534: &escape($upass),$uhome);
3535: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3536: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3537: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3538: &log($udom,,$uname,$uhome,
3539: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3540: $ENV{'user.name'}.', '.$umode.
3541: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3542: unless ($reply eq 'ok') {
3543: &logthis('Authentication mode error: '.$reply);
3544: return 'error: '.$reply;
3545: }
3546: return 'ok';
3547: }
3548:
3549: # --------------------------------------------------------------- Modify a user
3550:
3551: sub modifyuser {
3552: my ($udom, $uname, $uid,
3553: $umode, $upass, $first,
3554: $middle, $last, $gene,
3555: $forceid, $desiredhome, $email)=@_;
3556: $udom=~s/\W//g;
3557: $uname=~s/\W//g;
3558: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3559: $umode.', '.$first.', '.$middle.', '.
3560: $last.', '.$gene.'(forceid: '.$forceid.')'.
3561: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3562: ' desiredhome not specified').
3563: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3564: ' in domain '.$ENV{'request.role.domain'});
3565: my $uhome=&homeserver($uname,$udom,'true');
3566: # ----------------------------------------------------------------- Create User
3567: if (($uhome eq 'no_host') &&
3568: (($umode && $upass) || ($umode eq 'localauth'))) {
3569: my $unhome='';
3570: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3571: $unhome = $desiredhome;
3572: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
3573: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
3574: } else { # load balancing routine for determining $unhome
3575: my $tryserver;
3576: my $loadm=10000000;
3577: foreach $tryserver (keys %libserv) {
3578: if ($hostdom{$tryserver} eq $udom) {
3579: my $answer=reply('load',$tryserver);
3580: if (($answer=~/\d+/) && ($answer<$loadm)) {
3581: $loadm=$answer;
3582: $unhome=$tryserver;
3583: }
3584: }
3585: }
3586: }
3587: if (($unhome eq '') || ($unhome eq 'no_host')) {
3588: return 'error: unable to find a home server for '.$uname.
3589: ' in domain '.$udom;
3590: }
3591: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3592: &escape($upass),$unhome);
3593: unless ($reply eq 'ok') {
3594: return 'error: '.$reply;
3595: }
3596: $uhome=&homeserver($uname,$udom,'true');
3597: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3598: return 'error: unable verify users home machine.';
3599: }
3600: } # End of creation of new user
3601: # ---------------------------------------------------------------------- Add ID
3602: if ($uid) {
3603: $uid=~tr/A-Z/a-z/;
3604: my %uidhash=&idrget($udom,$uname);
3605: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3606: && (!$forceid)) {
3607: unless ($uid eq $uidhash{$uname}) {
3608: return 'error: user id "'.$uid.'" does not match '.
3609: 'current user id "'.$uidhash{$uname}.'".';
3610: }
3611: } else {
3612: &idput($udom,($uname => $uid));
3613: }
3614: }
3615: # -------------------------------------------------------------- Add names, etc
3616: my @tmp=&get('environment',
3617: ['firstname','middlename','lastname','generation'],
3618: $udom,$uname);
3619: my %names;
3620: if ($tmp[0] =~ m/^error:.*/) {
3621: %names=();
3622: } else {
3623: %names = @tmp;
3624: }
3625: #
3626: # Make sure to not trash student environment if instructor does not bother
3627: # to supply name and email information
3628: #
3629: if ($first) { $names{'firstname'} = $first; }
3630: if (defined($middle)) { $names{'middlename'} = $middle; }
3631: if ($last) { $names{'lastname'} = $last; }
3632: if (defined($gene)) { $names{'generation'} = $gene; }
3633: if ($email) { $names{'notification'} = $email;
3634: $names{'critnotification'} = $email; }
3635:
3636: my $reply = &put('environment', \%names, $udom,$uname);
3637: if ($reply ne 'ok') { return 'error: '.$reply; }
3638: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3639: $umode.', '.$first.', '.$middle.', '.
3640: $last.', '.$gene.' by '.
3641: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3642: return 'ok';
3643: }
3644:
3645: # -------------------------------------------------------------- Modify student
3646:
3647: sub modifystudent {
3648: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3649: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
3650: if (!$cid) {
3651: unless ($cid=$ENV{'request.course.id'}) {
3652: return 'not_in_class';
3653: }
3654: }
3655: # --------------------------------------------------------------- Make the user
3656: my $reply=&modifyuser
3657: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3658: $desiredhome,$email);
3659: unless ($reply eq 'ok') { return $reply; }
3660: # This will cause &modify_student_enrollment to get the uid from the
3661: # students environment
3662: $uid = undef if (!$forceid);
3663: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3664: $gene,$usec,$end,$start,$type,$locktype,$cid);
3665: return $reply;
3666: }
3667:
3668: sub modify_student_enrollment {
3669: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
3670: my ($cdom,$cnum,$chome);
3671: if (!$cid) {
3672: unless ($cid=$ENV{'request.course.id'}) {
3673: return 'not_in_class';
3674: }
3675: $cdom=$ENV{'course.'.$cid.'.domain'};
3676: $cnum=$ENV{'course.'.$cid.'.num'};
3677: } else {
3678: ($cdom,$cnum)=split(/_/,$cid);
3679: }
3680: $chome=$ENV{'course.'.$cid.'.home'};
3681: if (!$chome) {
3682: $chome=&homeserver($cnum,$cdom);
3683: }
3684: if (!$chome) { return 'unknown_course'; }
3685: # Make sure the user exists
3686: my $uhome=&homeserver($uname,$udom);
3687: if (($uhome eq '') || ($uhome eq 'no_host')) {
3688: return 'error: no such user';
3689: }
3690: # Get student data if we were not given enough information
3691: if (!defined($first) || $first eq '' ||
3692: !defined($last) || $last eq '' ||
3693: !defined($uid) || $uid eq '' ||
3694: !defined($middle) || $middle eq '' ||
3695: !defined($gene) || $gene eq '') {
3696: # They did not supply us with enough data to enroll the student, so
3697: # we need to pick up more information.
3698: my %tmp = &get('environment',
3699: ['firstname','middlename','lastname', 'generation','id']
3700: ,$udom,$uname);
3701:
3702: #foreach (keys(%tmp)) {
3703: # &logthis("key $_ = ".$tmp{$_});
3704: #}
3705: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3706: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3707: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3708: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3709: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3710: }
3711: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
3712: my $reply=cput('classlist',
3713: {"$uname:$udom" =>
3714: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
3715: $cdom,$cnum);
3716: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3717: return 'error: '.$reply;
3718: }
3719: # Add student role to user
3720: my $uurl='/'.$cid;
3721: $uurl=~s/\_/\//g;
3722: if ($usec) {
3723: $uurl.='/'.$usec;
3724: }
3725: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3726: }
3727:
3728: sub format_name {
3729: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
3730: my $name;
3731: if ($first ne 'lastname') {
3732: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
3733: } else {
3734: if ($lastname=~/\S/) {
3735: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
3736: $name=~s/\s+,/,/;
3737: } else {
3738: $name.= $firstname.' '.$middlename.' '.$generation;
3739: }
3740: }
3741: $name=~s/^\s+//;
3742: $name=~s/\s+$//;
3743: $name=~s/\s+/ /g;
3744: return $name;
3745: }
3746:
3747: # ------------------------------------------------- Write to course preferences
3748:
3749: sub writecoursepref {
3750: my ($courseid,%prefs)=@_;
3751: $courseid=~s/^\///;
3752: $courseid=~s/\_/\//g;
3753: my ($cdomain,$cnum)=split(/\//,$courseid);
3754: my $chome=homeserver($cnum,$cdomain);
3755: if (($chome eq '') || ($chome eq 'no_host')) {
3756: return 'error: no such course';
3757: }
3758: my $cstring='';
3759: foreach (keys %prefs) {
3760: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3761: }
3762: $cstring=~s/\&$//;
3763: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3764: }
3765:
3766: # ---------------------------------------------------------- Make/modify course
3767:
3768: sub createcourse {
3769: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
3770: $url=&declutter($url);
3771: my $cid='';
3772: unless (&allowed('ccc',$udom)) {
3773: return 'refused';
3774: }
3775: # ------------------------------------------------------------------- Create ID
3776: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3777: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3778: # ----------------------------------------------- Make sure that does not exist
3779: my $uhome=&homeserver($uname,$udom,'true');
3780: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3781: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3782: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3783: $uhome=&homeserver($uname,$udom,'true');
3784: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3785: return 'error: unable to generate unique course-ID';
3786: }
3787: }
3788: # ------------------------------------------------ Check supplied server name
3789: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3790: if (! exists($libserv{$course_server})) {
3791: return 'error:bad server name '.$course_server;
3792: }
3793: # ------------------------------------------------------------- Make the course
3794: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3795: $course_server);
3796: unless ($reply eq 'ok') { return 'error: '.$reply; }
3797: $uhome=&homeserver($uname,$udom,'true');
3798: if (($uhome eq '') || ($uhome eq 'no_host')) {
3799: return 'error: no such course';
3800: }
3801: # ----------------------------------------------------------------- Course made
3802: # log existence
3803: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
3804: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
3805: &flushcourselogs();
3806: # set toplevel url
3807: my $topurl=$url;
3808: unless ($nonstandard) {
3809: # ------------------------------------------ For standard courses, make top url
3810: my $mapurl=&clutter($url);
3811: if ($mapurl eq '/res/') { $mapurl=''; }
3812: $ENV{'form.initmap'}=(<<ENDINITMAP);
3813: <map>
3814: <resource id="1" type="start"></resource>
3815: <resource id="2" src="$mapurl"></resource>
3816: <resource id="3" type="finish"></resource>
3817: <link index="1" from="1" to="2"></link>
3818: <link index="2" from="2" to="3"></link>
3819: </map>
3820: ENDINITMAP
3821: $topurl=&declutter(
3822: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3823: );
3824: }
3825: # ----------------------------------------------------------- Write preferences
3826: &writecoursepref($udom.'_'.$uname,
3827: ('description' => $description,
3828: 'url' => $topurl));
3829: return '/'.$udom.'/'.$uname;
3830: }
3831:
3832: # ---------------------------------------------------------- Assign Custom Role
3833:
3834: sub assigncustomrole {
3835: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3836: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3837: $end,$start,$deleteflag);
3838: }
3839:
3840: # ----------------------------------------------------------------- Revoke Role
3841:
3842: sub revokerole {
3843: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3844: my $now=time;
3845: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3846: }
3847:
3848: # ---------------------------------------------------------- Revoke Custom Role
3849:
3850: sub revokecustomrole {
3851: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3852: my $now=time;
3853: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3854: $deleteflag);
3855: }
3856:
3857: # ------------------------------------------------------------ Disk usage
3858: sub diskusage {
3859: my ($udom,$uname,$directoryRoot)=@_;
3860: $directoryRoot =~ s/\/$//;
3861: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
3862: return $listing;
3863: }
3864:
3865: sub is_locked {
3866: my ($file_name, $domain, $user) = @_;
3867: my @check;
3868: my $is_locked;
3869: push @check, $file_name;
3870: my %locked = &Apache::lonnet::get('file_permissions',\@check,
3871: $ENV{'user.domain'},$ENV{'user.name'});
3872: if (ref($locked{$file_name}) eq 'ARRAY') {
3873: $is_locked = 'true';
3874: } else {
3875: $is_locked = 'false';
3876: }
3877: }
3878:
3879: # ------------------------------------------------------------- Mark as Read Only
3880:
3881: sub mark_as_readonly {
3882: my ($domain,$user,$files,$what) = @_;
3883: my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
3884: foreach my $file (@{$files}) {
3885: push(@{$current_permissions{$file}},$what);
3886: }
3887: &Apache::lonnet::put('file_permissions',\%current_permissions,$domain,$user);
3888: return;
3889: }
3890:
3891: # ------------------------------------------------------------Save Selected Files
3892:
3893: sub save_selected_files {
3894: my ($user, $path, @files) = @_;
3895: my $filename = $user."savedfiles";
3896: my @other_files = &files_not_in_path($user, $path);
3897: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3898: foreach my $file (@files) {
3899: print (OUT $ENV{'form.currentpath'}.$file."\n");
3900: }
3901: foreach my $file (@other_files) {
3902: print (OUT $file."\n");
3903: }
3904: close (OUT);
3905: return 'ok';
3906: }
3907:
3908: sub clear_selected_files {
3909: my ($user) = @_;
3910: my $filename = $user."savedfiles";
3911: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3912: print (OUT undef);
3913: close (OUT);
3914: return ("ok");
3915: }
3916:
3917: sub files_in_path {
3918: my ($user, $path) = @_;
3919: my $filename = $user."savedfiles";
3920: my %return_files;
3921: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3922: while (my $line_in = <IN>) {
3923: chomp ($line_in);
3924: my @paths_and_file = split (m!/!, $line_in);
3925: my $file_part = pop (@paths_and_file);
3926: my $path_part = join ('/', @paths_and_file);
3927: $path_part.='/';
3928: my $path_and_file = $path_part.$file_part;
3929: if ($path_part eq $path) {
3930: $return_files{$file_part}= 'selected';
3931: }
3932: }
3933: close (IN);
3934: return (\%return_files);
3935: }
3936:
3937: # called in portfolio select mode, to show files selected NOT in current directory
3938: sub files_not_in_path {
3939: my ($user, $path) = @_;
3940: my $filename = $user."savedfiles";
3941: my @return_files;
3942: my $path_part;
3943: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3944: while (<IN>) {
3945: #ok, I know it's clunky, but I want it to work
3946: my @paths_and_file = split m!/!, $_;
3947: my $file_part = pop (@paths_and_file);
3948: chomp ($file_part);
3949: my $path_part = join ('/', @paths_and_file);
3950: $path_part .= '/';
3951: my $path_and_file = $path_part.$file_part;
3952: if ($path_part ne $path) {
3953: push (@return_files, ($path_and_file));
3954: }
3955: }
3956: close (OUT);
3957: return (@return_files);
3958: }
3959:
3960: #--------------------------------------------------------------Get Marked as Read Only
3961:
3962: sub get_marked_as_readonly {
3963: my ($domain,$user,$what) = @_;
3964: my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
3965: my @readonly_files;
3966: while (my ($file_name,$value) = each(%current_permissions)) {
3967: if (ref($value) eq "ARRAY"){
3968: foreach my $stored_what (@{$value}) {
3969: if ($stored_what eq $what) {
3970: push(@readonly_files, $file_name);
3971: } elsif (!defined($what)) {
3972: push(@readonly_files, $file_name);
3973: }
3974: }
3975: }
3976: }
3977: return @readonly_files;
3978: }
3979: #-----------------------------------------------------------Get Marked as Read Only Hash
3980:
3981: sub get_marked_as_readonly_hash {
3982: my ($domain,$user,$what) = @_;
3983: my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
3984: my %readonly_files;
3985: while (my ($file_name,$value) = each(%current_permissions)) {
3986: if (ref($value) eq "ARRAY"){
3987: foreach my $stored_what (@{$value}) {
3988: if ($stored_what eq $what) {
3989: $readonly_files{$file_name} = 'locked';
3990: } elsif (!defined($what)) {
3991: $readonly_files{$file_name} = 'locked';
3992: }
3993: }
3994: }
3995: }
3996: return %readonly_files;
3997: }
3998: # ------------------------------------------------------------ Unmark as Read Only
3999:
4000: sub unmark_as_readonly {
4001: # unmarks all files locked by $what
4002: # for portfolio submissions, $what contains $crsid and $symb
4003: my ($domain,$user,$what) = @_;
4004: my %current_permissions = &Apache::lonnet::dump('file_permissions',$domain,$user);
4005: my @readonly_files = &Apache::lonnet::get_marked_as_readonly($domain,$user,$what);
4006: foreach my $file(@readonly_files){
4007: my $current_locks = $current_permissions{$file};
4008: my @new_locks;
4009: my @del_keys;
4010: if (ref($current_locks) eq "ARRAY"){
4011: foreach my $locker (@{$current_locks}) {
4012: unless ($locker eq $what) {
4013: push(@new_locks, $what);
4014: }
4015: }
4016: if (@new_locks > 0) {
4017: $current_permissions{$file} = \@new_locks;
4018: } else {
4019: push(@del_keys, $file);
4020: &Apache::lonnet::del('file_permissions',\@del_keys, $domain, $user);
4021: delete $current_permissions{$file};
4022: }
4023: }
4024: }
4025: &Apache::lonnet::put('file_permissions',\%current_permissions,$domain,$user);
4026: return;
4027: }
4028:
4029: # ------------------------------------------------------------ Directory lister
4030:
4031: sub dirlist {
4032: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
4033:
4034: $uri=~s/^\///;
4035: $uri=~s/\/$//;
4036: my ($udom, $uname);
4037: (undef,$udom,$uname)=split(/\//,$uri);
4038: if(defined($userdomain)) {
4039: $udom = $userdomain;
4040: }
4041: if(defined($username)) {
4042: $uname = $username;
4043: }
4044:
4045: my $dirRoot = $perlvar{'lonDocRoot'};
4046: if(defined($alternateDirectoryRoot)) {
4047: $dirRoot = $alternateDirectoryRoot;
4048: $dirRoot =~ s/\/$//;
4049: }
4050:
4051: if($udom) {
4052: if($uname) {
4053: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
4054: homeserver($uname,$udom));
4055: return split(/:/,$listing);
4056: } elsif(!defined($alternateDirectoryRoot)) {
4057: my $tryserver;
4058: my %allusers=();
4059: foreach $tryserver (keys %libserv) {
4060: if($hostdom{$tryserver} eq $udom) {
4061: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
4062: $udom, $tryserver);
4063: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
4064: && ($listing ne 'con_lost')) {
4065: foreach (split(/:/,$listing)) {
4066: my ($entry,@stat)=split(/&/,$_);
4067: $allusers{$entry}=1;
4068: }
4069: }
4070: }
4071: }
4072: my $alluserstr='';
4073: foreach (sort keys %allusers) {
4074: $alluserstr.=$_.'&user:';
4075: }
4076: $alluserstr=~s/:$//;
4077: return split(/:/,$alluserstr);
4078: } else {
4079: my @emptyResults = ();
4080: push(@emptyResults, 'missing user name');
4081: return split(':',@emptyResults);
4082: }
4083: } elsif(!defined($alternateDirectoryRoot)) {
4084: my $tryserver;
4085: my %alldom=();
4086: foreach $tryserver (keys %libserv) {
4087: $alldom{$hostdom{$tryserver}}=1;
4088: }
4089: my $alldomstr='';
4090: foreach (sort keys %alldom) {
4091: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
4092: }
4093: $alldomstr=~s/:$//;
4094: return split(/:/,$alldomstr);
4095: } else {
4096: my @emptyResults = ();
4097: push(@emptyResults, 'missing domain');
4098: return split(':',@emptyResults);
4099: }
4100: }
4101:
4102: # --------------------------------------------- GetFileTimestamp
4103: # This function utilizes dirlist and returns the date stamp for
4104: # when it was last modified. It will also return an error of -1
4105: # if an error occurs
4106:
4107: ##
4108: ## FIXME: This subroutine assumes its caller knows something about the
4109: ## directory structure of the home server for the student ($root).
4110: ## Not a good assumption to make. Since this is for looking up files
4111: ## in user directories, the full path should be constructed by lond, not
4112: ## whatever machine we request data from.
4113: ##
4114: sub GetFileTimestamp {
4115: my ($studentDomain,$studentName,$filename,$root)=@_;
4116: $studentDomain=~s/\W//g;
4117: $studentName=~s/\W//g;
4118: my $subdir=$studentName.'__';
4119: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4120: my $proname="$studentDomain/$subdir/$studentName";
4121: $proname .= '/'.$filename;
4122: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4123: $studentName, $root);
4124: my @stats = split('&', $fileStat);
4125: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4126: # @stats contains first the filename, then the stat output
4127: return $stats[10]; # so this is 10 instead of 9.
4128: } else {
4129: return -1;
4130: }
4131: }
4132:
4133: # -------------------------------------------------------- Value of a Condition
4134:
4135: sub directcondval {
4136: my $number=shift;
4137: if (!defined($ENV{'user.state.'.$ENV{'request.course.id'}})) {
4138: &Apache::lonuserstate::evalstate();
4139: }
4140: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
4141: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
4142: } else {
4143: return 2;
4144: }
4145: }
4146:
4147: sub condval {
4148: my $condidx=shift;
4149: my $result=0;
4150: my $allpathcond='';
4151: foreach (split(/\|/,$condidx)) {
4152: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
4153: $allpathcond.=
4154: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
4155: }
4156: }
4157: $allpathcond=~s/\|$//;
4158: if ($ENV{'request.course.id'}) {
4159: if ($allpathcond) {
4160: my $operand='|';
4161: my @stack;
4162: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
4163: if ($_ eq '(') {
4164: push @stack,($operand,$result)
4165: } elsif ($_ eq ')') {
4166: my $before=pop @stack;
4167: if (pop @stack eq '&') {
4168: $result=$result>$before?$before:$result;
4169: } else {
4170: $result=$result>$before?$result:$before;
4171: }
4172: } elsif (($_ eq '&') || ($_ eq '|')) {
4173: $operand=$_;
4174: } else {
4175: my $new=directcondval($_);
4176: if ($operand eq '&') {
4177: $result=$result>$new?$new:$result;
4178: } else {
4179: $result=$result>$new?$result:$new;
4180: }
4181: }
4182: }
4183: }
4184: }
4185: return $result;
4186: }
4187:
4188: # ---------------------------------------------------- Devalidate courseresdata
4189:
4190: sub devalidatecourseresdata {
4191: my ($coursenum,$coursedomain)=@_;
4192: my $hashid=$coursenum.':'.$coursedomain;
4193: &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
4194: }
4195:
4196: # --------------------------------------------------- Course Resourcedata Query
4197:
4198: sub courseresdata {
4199: my ($coursenum,$coursedomain,@which)=@_;
4200: my $coursehom=&homeserver($coursenum,$coursedomain);
4201: my $hashid=$coursenum.':'.$coursedomain;
4202: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
4203: unless (defined($cached)) {
4204: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4205: $result=\%dumpreply;
4206: my ($tmp) = keys(%dumpreply);
4207: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4208: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
4209: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4210: return $tmp;
4211: } elsif ($tmp =~ /^(error)/) {
4212: $result=undef;
4213: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
4214: }
4215: }
4216: foreach my $item (@which) {
4217: if (defined($result->{$item})) {
4218: return $result->{$item};
4219: }
4220: }
4221: return undef;
4222: }
4223:
4224: #
4225: # EXT resource caching routines
4226: #
4227:
4228: sub clear_EXT_cache_status {
4229: &delenv('cache.EXT.');
4230: }
4231:
4232: sub EXT_cache_status {
4233: my ($target_domain,$target_user) = @_;
4234: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4235: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
4236: # We know already the user has no data
4237: return 1;
4238: } else {
4239: return 0;
4240: }
4241: }
4242:
4243: sub EXT_cache_set {
4244: my ($target_domain,$target_user) = @_;
4245: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4246: &appenv($cachename => time);
4247: }
4248:
4249: # --------------------------------------------------------- Value of a Variable
4250: sub EXT {
4251: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4252:
4253: unless ($varname) { return ''; }
4254: #get real user name/domain, courseid and symb
4255: my $courseid;
4256: my $publicuser;
4257: if ($symbparm) {
4258: $symbparm=&get_symb_from_alias($symbparm);
4259: }
4260: if (!($uname && $udom)) {
4261: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4262: &Apache::lonxml::whichuser($symbparm);
4263: if (!$symbparm) { $symbparm=$cursymb; }
4264: } else {
4265: $courseid=$ENV{'request.course.id'};
4266: }
4267: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4268: my $rest;
4269: if (defined($therest[0])) {
4270: $rest=join('.',@therest);
4271: } else {
4272: $rest='';
4273: }
4274:
4275: my $qualifierrest=$qualifier;
4276: if ($rest) { $qualifierrest.='.'.$rest; }
4277: my $spacequalifierrest=$space;
4278: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4279: if ($realm eq 'user') {
4280: # --------------------------------------------------------------- user.resource
4281: if ($space eq 'resource') {
4282: if (defined($Apache::lonhomework::parsing_a_problem)) {
4283: return $Apache::lonhomework::history{$qualifierrest};
4284: } else {
4285: my %restored;
4286: if ($publicuser || $ENV{'request.state'} eq 'construct') {
4287: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4288: } else {
4289: %restored=&restore($symbparm,$courseid,$udom,$uname);
4290: }
4291: return $restored{$qualifierrest};
4292: }
4293: # ----------------------------------------------------------------- user.access
4294: } elsif ($space eq 'access') {
4295: # FIXME - not supporting calls for a specific user
4296: return &allowed($qualifier,$rest);
4297: # ------------------------------------------ user.preferences, user.environment
4298: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4299: if (($uname eq $ENV{'user.name'}) &&
4300: ($udom eq $ENV{'user.domain'})) {
4301: return $ENV{join('.',('environment',$qualifierrest))};
4302: } else {
4303: my %returnhash;
4304: if (!$publicuser) {
4305: %returnhash=&userenvironment($udom,$uname,
4306: $qualifierrest);
4307: }
4308: return $returnhash{$qualifierrest};
4309: }
4310: # ----------------------------------------------------------------- user.course
4311: } elsif ($space eq 'course') {
4312: # FIXME - not supporting calls for a specific user
4313: return $ENV{join('.',('request.course',$qualifier))};
4314: # ------------------------------------------------------------------- user.role
4315: } elsif ($space eq 'role') {
4316: # FIXME - not supporting calls for a specific user
4317: my ($role,$where)=split(/\./,$ENV{'request.role'});
4318: if ($qualifier eq 'value') {
4319: return $role;
4320: } elsif ($qualifier eq 'extent') {
4321: return $where;
4322: }
4323: # ----------------------------------------------------------------- user.domain
4324: } elsif ($space eq 'domain') {
4325: return $udom;
4326: # ------------------------------------------------------------------- user.name
4327: } elsif ($space eq 'name') {
4328: return $uname;
4329: # ---------------------------------------------------- Any other user namespace
4330: } else {
4331: my %reply;
4332: if (!$publicuser) {
4333: %reply=&get($space,[$qualifierrest],$udom,$uname);
4334: }
4335: return $reply{$qualifierrest};
4336: }
4337: } elsif ($realm eq 'query') {
4338: # ---------------------------------------------- pull stuff out of query string
4339: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4340: [$spacequalifierrest]);
4341: return $ENV{'form.'.$spacequalifierrest};
4342: } elsif ($realm eq 'request') {
4343: # ------------------------------------------------------------- request.browser
4344: if ($space eq 'browser') {
4345: if ($qualifier eq 'textremote') {
4346: if (&mt('textual_remote_display') eq 'on') {
4347: return 1;
4348: } else {
4349: return 0;
4350: }
4351: } else {
4352: return $ENV{'browser.'.$qualifier};
4353: }
4354: # ------------------------------------------------------------ request.filename
4355: } else {
4356: return $ENV{'request.'.$spacequalifierrest};
4357: }
4358: } elsif ($realm eq 'course') {
4359: # ---------------------------------------------------------- course.description
4360: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
4361: } elsif ($realm eq 'resource') {
4362:
4363: my $section;
4364: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
4365: if (!$symbparm) { $symbparm=&symbread(); }
4366: }
4367: if ($symbparm && defined($courseid) &&
4368: $courseid eq $ENV{'request.course.id'}) {
4369:
4370: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4371:
4372: # ----------------------------------------------------- Cascading lookup scheme
4373: my $symbp=$symbparm;
4374: my $mapp=(&decode_symb($symbp))[0];
4375:
4376: my $symbparm=$symbp.'.'.$spacequalifierrest;
4377: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4378:
4379: if (($ENV{'user.name'} eq $uname) &&
4380: ($ENV{'user.domain'} eq $udom)) {
4381: $section=$ENV{'request.course.sec'};
4382: } else {
4383: if (! defined($usection)) {
4384: $section=&getsection($udom,$uname,$courseid);
4385: } else {
4386: $section = $usection;
4387: }
4388: }
4389:
4390: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4391: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4392: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4393:
4394: my $courselevel=$courseid.'.'.$spacequalifierrest;
4395: my $courselevelr=$courseid.'.'.$symbparm;
4396: my $courselevelm=$courseid.'.'.$mapparm;
4397:
4398: # ----------------------------------------------------------- first, check user
4399: #most student don\'t have any data set, check if there is some data
4400: if (! &EXT_cache_status($udom,$uname)) {
4401: my $hashid="$udom:$uname";
4402: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
4403: 'userres');
4404: if (!defined($cached)) {
4405: my %resourcedata=&dump('resourcedata',$udom,$uname);
4406: $result=\%resourcedata;
4407: &do_cache(\%userresdatacache,$hashid,$result,'userres');
4408: }
4409: my ($tmp)=keys(%$result);
4410: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4411: if ($$result{$courselevelr}) {
4412: return $$result{$courselevelr}; }
4413: if ($$result{$courselevelm}) {
4414: return $$result{$courselevelm}; }
4415: if ($$result{$courselevel}) {
4416: return $$result{$courselevel}; }
4417: } else {
4418: #error 2 occurs when the .db doesn't exist
4419: if ($tmp!~/error: 2 /) {
4420: &logthis("<font color=blue>WARNING:".
4421: " Trying to get resource data for ".
4422: $uname." at ".$udom.": ".
4423: $tmp."</font>");
4424: } elsif ($tmp=~/error: 2 /) {
4425: &EXT_cache_set($udom,$uname);
4426: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4427: return $tmp;
4428: }
4429: }
4430: }
4431:
4432: # -------------------------------------------------------- second, check course
4433:
4434: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
4435: $ENV{'course.'.$courseid.'.domain'},
4436: ($seclevelr,$seclevelm,$seclevel,
4437: $courselevelr,$courselevelm,
4438: $courselevel));
4439: if (defined($coursereply)) { return $coursereply; }
4440:
4441: # ------------------------------------------------------ third, check map parms
4442: my %parmhash=();
4443: my $thisparm='';
4444: if (tie(%parmhash,'GDBM_File',
4445: $ENV{'request.course.fn'}.'_parms.db',
4446: &GDBM_READER(),0640)) {
4447: $thisparm=$parmhash{$symbparm};
4448: untie(%parmhash);
4449: }
4450: if ($thisparm) { return $thisparm; }
4451: }
4452: # --------------------------------------------- last, look in resource metadata
4453:
4454: $spacequalifierrest=~s/\./\_/;
4455: my $filename;
4456: if (!$symbparm) { $symbparm=&symbread(); }
4457: if ($symbparm) {
4458: $filename=(&decode_symb($symbparm))[2];
4459: } else {
4460: $filename=$ENV{'request.filename'};
4461: }
4462: my $metadata=&metadata($filename,$spacequalifierrest);
4463: if (defined($metadata)) { return $metadata; }
4464: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4465: if (defined($metadata)) { return $metadata; }
4466:
4467: # ------------------------------------------------------------------ Cascade up
4468: unless ($space eq '0') {
4469: my @parts=split(/_/,$space);
4470: my $id=pop(@parts);
4471: my $part=join('_',@parts);
4472: if ($part eq '') { $part='0'; }
4473: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4474: $symbparm,$udom,$uname,$section,1);
4475: if (defined($partgeneral)) { return $partgeneral; }
4476: }
4477: if ($recurse) { return undef; }
4478: my $pack_def=&packages_tab_default($filename,$varname);
4479: if (defined($pack_def)) { return $pack_def; }
4480:
4481: # ---------------------------------------------------- Any other user namespace
4482: } elsif ($realm eq 'environment') {
4483: # ----------------------------------------------------------------- environment
4484: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
4485: return $ENV{'environment.'.$spacequalifierrest};
4486: } else {
4487: my %returnhash=&userenvironment($udom,$uname,
4488: $spacequalifierrest);
4489: return $returnhash{$spacequalifierrest};
4490: }
4491: } elsif ($realm eq 'system') {
4492: # ----------------------------------------------------------------- system.time
4493: if ($space eq 'time') {
4494: return time;
4495: }
4496: }
4497: return '';
4498: }
4499:
4500: sub packages_tab_default {
4501: my ($uri,$varname)=@_;
4502: my (undef,$part,$name)=split(/\./,$varname);
4503: my $packages=&metadata($uri,'packages');
4504: foreach my $package (split(/,/,$packages)) {
4505: my ($pack_type,$pack_part)=split(/_/,$package,2);
4506: if (defined($packagetab{"$pack_type&$name&default"})) {
4507: return $packagetab{"$pack_type&$name&default"};
4508: }
4509: if ($pack_type eq 'part') { $pack_part='0'; }
4510: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4511: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4512: }
4513: }
4514: return undef;
4515: }
4516:
4517: sub add_prefix_and_part {
4518: my ($prefix,$part)=@_;
4519: my $keyroot;
4520: if (defined($prefix) && $prefix !~ /^__/) {
4521: # prefix that has a part already
4522: $keyroot=$prefix;
4523: } elsif (defined($prefix)) {
4524: # prefix that is missing a part
4525: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4526: } else {
4527: # no prefix at all
4528: if (defined($part)) { $keyroot='_'.$part; }
4529: }
4530: return $keyroot;
4531: }
4532:
4533: # ---------------------------------------------------------------- Get metadata
4534:
4535: my %metaentry;
4536: sub metadata {
4537: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
4538: $uri=&declutter($uri);
4539: # if it is a non metadata possible uri return quickly
4540: if (($uri eq '') ||
4541: (($uri =~ m|^/*adm/|) &&
4542: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
4543: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
4544: ($uri =~ m|home/[^/]+/public_html/|)) {
4545: return undef;
4546: }
4547: my $filename=$uri;
4548: $uri=~s/\.meta$//;
4549: #
4550: # Is the metadata already cached?
4551: # Look at timestamp of caching
4552: # Everything is cached by the main uri, libraries are never directly cached
4553: #
4554: if (!defined($liburi)) {
4555: my ($result,$cached)=&is_cached_new($metacache,'meta',$uri);
4556: if (defined($cached)) { return $result->{':'.$what}; }
4557: }
4558: {
4559: #
4560: # Is this a recursive call for a library?
4561: #
4562: # if (! exists($metacache{$uri})) {
4563: # $metacache{$uri}={};
4564: # }
4565: if ($liburi) {
4566: $liburi=&declutter($liburi);
4567: $filename=$liburi;
4568: } else {
4569: &devalidate_cache_new($metacache,'meta',$uri);
4570: undef(%metaentry);
4571: }
4572: my %metathesekeys=();
4573: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
4574: my $metastring;
4575: if ($uri !~ m|^uploaded/|) {
4576: my $file=&filelocation('',&clutter($filename));
4577: #push(@{$metaentry{$uri.'.file'}},$file);
4578: $metastring=&getfile($file);
4579: }
4580: my $parser=HTML::LCParser->new(\$metastring);
4581: my $token;
4582: undef %metathesekeys;
4583: while ($token=$parser->get_token) {
4584: if ($token->[0] eq 'S') {
4585: if (defined($token->[2]->{'package'})) {
4586: #
4587: # This is a package - get package info
4588: #
4589: my $package=$token->[2]->{'package'};
4590: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4591: if (defined($token->[2]->{'id'})) {
4592: $keyroot.='_'.$token->[2]->{'id'};
4593: }
4594: if ($metaentry{':packages'}) {
4595: $metaentry{':packages'}.=','.$package.$keyroot;
4596: } else {
4597: $metaentry{':packages'}=$package.$keyroot;
4598: }
4599: foreach (keys %packagetab) {
4600: my $part=$keyroot;
4601: $part=~s/^\_//;
4602: if ($_=~/^\Q$package\E\&/ ||
4603: $_=~/^\Q$package\E_0\&/) {
4604: my ($pack,$name,$subp)=split(/\&/,$_);
4605: # ignore package.tab specified default values
4606: # here &package_tab_default() will fetch those
4607: if ($subp eq 'default') { next; }
4608: my $value=$packagetab{$_};
4609: my $unikey;
4610: if ($pack =~ /_0$/) {
4611: $unikey='parameter_0_'.$name;
4612: $part=0;
4613: } else {
4614: $unikey='parameter'.$keyroot.'_'.$name;
4615: }
4616: if ($subp eq 'display') {
4617: $value.=' [Part: '.$part.']';
4618: }
4619: $metaentry{':'.$unikey.'.part'}=$part;
4620: $metathesekeys{$unikey}=1;
4621: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
4622: $metaentry{':'.$unikey.'.'.$subp}=$value;
4623: }
4624: if (defined($metaentry{':'.$unikey.'.default'})) {
4625: $metaentry{':'.$unikey}=
4626: $metaentry{':'.$unikey.'.default'};
4627: }
4628: }
4629: }
4630: } else {
4631: #
4632: # This is not a package - some other kind of start tag
4633: #
4634: my $entry=$token->[1];
4635: my $unikey;
4636: if ($entry eq 'import') {
4637: $unikey='';
4638: } else {
4639: $unikey=$entry;
4640: }
4641: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4642:
4643: if (defined($token->[2]->{'id'})) {
4644: $unikey.='_'.$token->[2]->{'id'};
4645: }
4646:
4647: if ($entry eq 'import') {
4648: #
4649: # Importing a library here
4650: #
4651: if ($depthcount<20) {
4652: my $location=$parser->get_text('/import');
4653: my $dir=$filename;
4654: $dir=~s|[^/]*$||;
4655: $location=&filelocation($dir,$location);
4656: foreach (sort(split(/\,/,&metadata($uri,'keys',
4657: $location,$unikey,
4658: $depthcount+1)))) {
4659: $metaentry{':'.$_}=$metaentry{':'.$_};
4660: $metathesekeys{$_}=1;
4661: }
4662: }
4663: } else {
4664:
4665: if (defined($token->[2]->{'name'})) {
4666: $unikey.='_'.$token->[2]->{'name'};
4667: }
4668: $metathesekeys{$unikey}=1;
4669: foreach (@{$token->[3]}) {
4670: $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4671: }
4672: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4673: my $default=$metaentry{':'.$unikey.'.default'};
4674: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4675: # only ws inside the tag, and not in default, so use default
4676: # as value
4677: $metaentry{':'.$unikey}=$default;
4678: } else {
4679: # either something interesting inside the tag or default
4680: # uninteresting
4681: $metaentry{':'.$unikey}=$internaltext;
4682: }
4683: # end of not-a-package not-a-library import
4684: }
4685: # end of not-a-package start tag
4686: }
4687: # the next is the end of "start tag"
4688: }
4689: }
4690: my ($extension) = ($uri =~ /\.(\w+)$/);
4691: foreach my $key (sort(keys(%packagetab))) {
4692: #&logthis("extsion1 $extension $key !!");
4693: #no specific packages #how's our extension
4694: if ($key!~/^extension_\Q$extension\E&/) { next; }
4695: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4696: \%metathesekeys);
4697: }
4698: if (!exists($metaentry{':packages'})) {
4699: foreach my $key (sort(keys(%packagetab))) {
4700: #no specific packages well let's get default then
4701: if ($key!~/^default&/) { next; }
4702: &metadata_create_package_def($uri,$key,'default',
4703: \%metathesekeys);
4704: }
4705: }
4706: # are there custom rights to evaluate
4707: if ($metaentry{':copyright'} eq 'custom') {
4708:
4709: #
4710: # Importing a rights file here
4711: #
4712: unless ($depthcount) {
4713: my $location=$metaentry{':customdistributionfile'};
4714: my $dir=$filename;
4715: $dir=~s|[^/]*$||;
4716: $location=&filelocation($dir,$location);
4717: foreach (sort(split(/\,/,&metadata($uri,'keys',
4718: $location,'_rights',
4719: $depthcount+1)))) {
4720: #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
4721: $metathesekeys{$_}=1;
4722: }
4723: }
4724: }
4725: $metaentry{':keys'}=join(',',keys %metathesekeys);
4726: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
4727: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
4728: &do_cache_new($metacache,'meta',$uri,\%metaentry);
4729: # this is the end of "was not already recently cached
4730: }
4731: return $metaentry{':'.$what};
4732: }
4733:
4734: sub metadata_create_package_def {
4735: my ($uri,$key,$package,$metathesekeys)=@_;
4736: my ($pack,$name,$subp)=split(/\&/,$key);
4737: if ($subp eq 'default') { next; }
4738:
4739: if (defined($metaentry{':packages'})) {
4740: $metaentry{':packages'}.=','.$package;
4741: } else {
4742: $metaentry{':packages'}=$package;
4743: }
4744: my $value=$packagetab{$key};
4745: my $unikey;
4746: $unikey='parameter_0_'.$name;
4747: $metaentry{':'.$unikey.'.part'}=0;
4748: $$metathesekeys{$unikey}=1;
4749: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
4750: $metaentry{':'.$unikey.'.'.$subp}=$value;
4751: }
4752: if (defined($metaentry{':'.$unikey.'.default'})) {
4753: $metaentry{':'.$unikey}=
4754: $metaentry{':'.$unikey.'.default'};
4755: }
4756: }
4757:
4758: sub metadata_generate_part0 {
4759: my ($metadata,$metacache,$uri) = @_;
4760: my %allnames;
4761: foreach my $metakey (sort keys %$metadata) {
4762: if ($metakey=~/^parameter\_(.*)/) {
4763: my $part=$$metacache{':'.$metakey.'.part'};
4764: my $name=$$metacache{':'.$metakey.'.name'};
4765: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
4766: $allnames{$name}=$part;
4767: }
4768: }
4769: }
4770: foreach my $name (keys(%allnames)) {
4771: $$metadata{"parameter_0_$name"}=1;
4772: my $key=":parameter_0_$name";
4773: $$metacache{"$key.part"}='0';
4774: $$metacache{"$key.name"}=$name;
4775: $$metacache{"$key.type"}=$$metacache{':parameter_'.
4776: $allnames{$name}.'_'.$name.
4777: '.type'};
4778: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
4779: '.display'};
4780: my $expr='\\[Part: '.$allnames{$name}.'\\]';
4781: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
4782: $$metacache{"$key.display"}=$olddis;
4783: }
4784: }
4785:
4786: # ------------------------------------------------- Get the title of a resource
4787:
4788: sub gettitle {
4789: my $urlsymb=shift;
4790: my $symb=&symbread($urlsymb);
4791: if ($symb) {
4792: my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
4793: if (defined($cached)) {
4794: return $result;
4795: }
4796: my ($map,$resid,$url)=&decode_symb($symb);
4797: my $title='';
4798: my %bighash;
4799: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4800: &GDBM_READER(),0640)) {
4801: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4802: $title=$bighash{'title_'.$mapid.'.'.$resid};
4803: untie %bighash;
4804: }
4805: $title=~s/\&colon\;/\:/gs;
4806: if ($title) {
4807: return &do_cache(\%titlecache,$symb,$title,'title');
4808: }
4809: $urlsymb=$url;
4810: }
4811: my $title=&metadata($urlsymb,'title');
4812: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
4813: return $title;
4814: }
4815:
4816: # ------------------------------------------------- Update symbolic store links
4817:
4818: sub symblist {
4819: my ($mapname,%newhash)=@_;
4820: $mapname=&deversion(&declutter($mapname));
4821: my %hash;
4822: if (($ENV{'request.course.fn'}) && (%newhash)) {
4823: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4824: &GDBM_WRCREAT(),0640)) {
4825: foreach (keys %newhash) {
4826: $hash{declutter($_)}=$mapname.'___'.&deversion($newhash{$_});
4827: }
4828: if (untie(%hash)) {
4829: return 'ok';
4830: }
4831: }
4832: }
4833: return 'error';
4834: }
4835:
4836: # --------------------------------------------------------------- Verify a symb
4837:
4838: sub symbverify {
4839: my ($symb,$thisurl)=@_;
4840: my $thisfn=$thisurl;
4841: # wrapper not part of symbs
4842: $thisfn=~s/^\/adm\/wrapper//;
4843: $thisfn=&declutter($thisfn);
4844: # direct jump to resource in page or to a sequence - will construct own symbs
4845: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4846: # check URL part
4847: my ($map,$resid,$url)=&decode_symb($symb);
4848:
4849: unless ($url eq $thisfn) { return 0; }
4850:
4851: $symb=&symbclean($symb);
4852: $thisurl=&deversion($thisurl);
4853: $thisfn=&deversion($thisfn);
4854:
4855: my %bighash;
4856: my $okay=0;
4857:
4858: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4859: &GDBM_READER(),0640)) {
4860: my $ids=$bighash{'ids_'.&clutter($thisurl)};
4861: unless ($ids) {
4862: $ids=$bighash{'ids_/'.$thisurl};
4863: }
4864: if ($ids) {
4865: # ------------------------------------------------------------------- Has ID(s)
4866: foreach (split(/\,/,$ids)) {
4867: my ($mapid,$resid)=split(/\./,$_);
4868: if (
4869: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4870: eq $symb) {
4871: if (($ENV{'request.role.adv'}) ||
4872: $bighash{'encrypted_'.$_} eq $ENV{'request.enc'}) {
4873: $okay=1;
4874: }
4875: }
4876: }
4877: }
4878: untie(%bighash);
4879: }
4880: return $okay;
4881: }
4882:
4883: # --------------------------------------------------------------- Clean-up symb
4884:
4885: sub symbclean {
4886: my $symb=shift;
4887: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
4888: # remove version from map
4889: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4890:
4891: # remove version from URL
4892: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4893:
4894: # remove wrapper
4895:
4896: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
4897: return $symb;
4898: }
4899:
4900: # ---------------------------------------------- Split symb to find map and url
4901:
4902: sub encode_symb {
4903: my ($map,$resid,$url)=@_;
4904: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4905: }
4906:
4907: sub decode_symb {
4908: my $symb=shift;
4909: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
4910: my ($map,$resid,$url)=split(/___/,$symb);
4911: return (&fixversion($map),$resid,&fixversion($url));
4912: }
4913:
4914: sub fixversion {
4915: my $fn=shift;
4916: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
4917: my %bighash;
4918: my $uri=&clutter($fn);
4919: my $key=$ENV{'request.course.id'}.'_'.$uri;
4920: # is this cached?
4921: my ($result,$cached)=&is_cached(\%courseresversioncache,$key,
4922: 'courseresversion',600);
4923: if (defined($cached)) { return $result; }
4924: # unfortunately not cached, or expired
4925: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4926: &GDBM_READER(),0640)) {
4927: if ($bighash{'version_'.$uri}) {
4928: my $version=$bighash{'version_'.$uri};
4929: unless (($version eq 'mostrecent') ||
4930: ($version==&getversion($uri))) {
4931: $uri=~s/\.(\w+)$/\.$version\.$1/;
4932: }
4933: }
4934: untie %bighash;
4935: }
4936: return &do_cache
4937: (\%courseresversioncache,$key,&declutter($uri),'courseresversion');
4938: }
4939:
4940: sub deversion {
4941: my $url=shift;
4942: $url=~s/\.\d+\.(\w+)$/\.$1/;
4943: return $url;
4944: }
4945:
4946: # ------------------------------------------------------ Return symb list entry
4947:
4948: sub symbread {
4949: my ($thisfn,$donotrecurse)=@_;
4950: my $cache_str='request.symbread.cached.'.$thisfn;
4951: if (defined($ENV{$cache_str})) { return $ENV{$cache_str}; }
4952: # no filename provided? try from environment
4953: unless ($thisfn) {
4954: if ($ENV{'request.symb'}) {
4955: return $ENV{$cache_str}=&symbclean($ENV{'request.symb'});
4956: }
4957: $thisfn=$ENV{'request.filename'};
4958: }
4959: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
4960: # is that filename actually a symb? Verify, clean, and return
4961: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4962: if (&symbverify($thisfn,$1)) {
4963: return $ENV{$cache_str}=&symbclean($thisfn);
4964: }
4965: }
4966: $thisfn=declutter($thisfn);
4967: my %hash;
4968: my %bighash;
4969: my $syval='';
4970: if (($ENV{'request.course.fn'}) && ($thisfn)) {
4971: my $targetfn = $thisfn;
4972: if ( ($thisfn =~ m/^uploaded\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4973: $targetfn = 'adm/wrapper/'.$thisfn;
4974: }
4975: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4976: &GDBM_READER(),0640)) {
4977: $syval=$hash{$targetfn};
4978: untie(%hash);
4979: }
4980: # ---------------------------------------------------------- There was an entry
4981: if ($syval) {
4982: unless ($syval=~/\_\d+$/) {
4983: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
4984: &appenv('request.ambiguous' => $thisfn);
4985: return $ENV{$cache_str}='';
4986: }
4987: $syval.=$1;
4988: }
4989: } else {
4990: # ------------------------------------------------------- Was not in symb table
4991: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4992: &GDBM_READER(),0640)) {
4993: # ---------------------------------------------- Get ID(s) for current resource
4994: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4995: unless ($ids) {
4996: $ids=$bighash{'ids_/'.$thisfn};
4997: }
4998: unless ($ids) {
4999: # alias?
5000: $ids=$bighash{'mapalias_'.$thisfn};
5001: }
5002: if ($ids) {
5003: # ------------------------------------------------------------------- Has ID(s)
5004: my @possibilities=split(/\,/,$ids);
5005: if ($#possibilities==0) {
5006: # ----------------------------------------------- There is only one possibility
5007: my ($mapid,$resid)=split(/\./,$ids);
5008: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
5009: } elsif (!$donotrecurse) {
5010: # ------------------------------------------ There is more than one possibility
5011: my $realpossible=0;
5012: foreach (@possibilities) {
5013: my $file=$bighash{'src_'.$_};
5014: if (&allowed('bre',$file)) {
5015: my ($mapid,$resid)=split(/\./,$_);
5016: if ($bighash{'map_type_'.$mapid} ne 'page') {
5017: $realpossible++;
5018: $syval=declutter($bighash{'map_id_'.$mapid}).
5019: '___'.$resid;
5020: }
5021: }
5022: }
5023: if ($realpossible!=1) { $syval=''; }
5024: } else {
5025: $syval='';
5026: }
5027: }
5028: untie(%bighash)
5029: }
5030: }
5031: if ($syval) {
5032: return $ENV{$cache_str}=&symbclean($syval.'___'.$thisfn);
5033: }
5034: }
5035: &appenv('request.ambiguous' => $thisfn);
5036: return $ENV{$cache_str}='';
5037: }
5038:
5039: # ---------------------------------------------------------- Return random seed
5040:
5041: sub numval {
5042: my $txt=shift;
5043: $txt=~tr/A-J/0-9/;
5044: $txt=~tr/a-j/0-9/;
5045: $txt=~tr/K-T/0-9/;
5046: $txt=~tr/k-t/0-9/;
5047: $txt=~tr/U-Z/0-5/;
5048: $txt=~tr/u-z/0-5/;
5049: $txt=~s/\D//g;
5050: if ($_64bit) { if ($txt > 2**32) { return -1; } }
5051: return int($txt);
5052: }
5053:
5054: sub numval2 {
5055: my $txt=shift;
5056: $txt=~tr/A-J/0-9/;
5057: $txt=~tr/a-j/0-9/;
5058: $txt=~tr/K-T/0-9/;
5059: $txt=~tr/k-t/0-9/;
5060: $txt=~tr/U-Z/0-5/;
5061: $txt=~tr/u-z/0-5/;
5062: $txt=~s/\D//g;
5063: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5064: my $total;
5065: foreach my $val (@txts) { $total+=$val; }
5066: if ($_64bit) { if ($total > 2**32) { return -1; } }
5067: return int($total);
5068: }
5069:
5070: sub numval3 {
5071: use integer;
5072: my $txt=shift;
5073: $txt=~tr/A-J/0-9/;
5074: $txt=~tr/a-j/0-9/;
5075: $txt=~tr/K-T/0-9/;
5076: $txt=~tr/k-t/0-9/;
5077: $txt=~tr/U-Z/0-5/;
5078: $txt=~tr/u-z/0-5/;
5079: $txt=~s/\D//g;
5080: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5081: my $total;
5082: foreach my $val (@txts) { $total+=$val; }
5083: if ($_64bit) { $total=(($total<<32)>>32); }
5084: return $total;
5085: }
5086:
5087: sub latest_rnd_algorithm_id {
5088: return '64bit4';
5089: }
5090:
5091: sub get_rand_alg {
5092: my ($courseid)=@_;
5093: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5094: if ($courseid) {
5095: return $ENV{"course.$courseid.rndseed"};
5096: }
5097: return &latest_rnd_algorithm_id();
5098: }
5099:
5100: sub validCODE {
5101: my ($CODE)=@_;
5102: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5103: return 0;
5104: }
5105:
5106: sub getCODE {
5107: if (&validCODE($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
5108: if (defined($Apache::lonhomework::parsing_a_problem) &&
5109: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5110: return $Apache::lonhomework::history{'resource.CODE'};
5111: }
5112: return undef;
5113: }
5114:
5115: sub rndseed {
5116: my ($symb,$courseid,$domain,$username)=@_;
5117:
5118: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5119: if (!$symb) {
5120: unless ($symb=$wsymb) { return time; }
5121: }
5122: if (!$courseid) { $courseid=$wcourseid; }
5123: if (!$domain) { $domain=$wdomain; }
5124: if (!$username) { $username=$wusername }
5125: my $which=&get_rand_alg();
5126: if (defined(&getCODE())) {
5127: if ($which eq '64bit4') {
5128: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5129: } else {
5130: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5131: }
5132: } elsif ($which eq '64bit4') {
5133: return &rndseed_64bit4($symb,$courseid,$domain,$username);
5134: } elsif ($which eq '64bit3') {
5135: return &rndseed_64bit3($symb,$courseid,$domain,$username);
5136: } elsif ($which eq '64bit2') {
5137: return &rndseed_64bit2($symb,$courseid,$domain,$username);
5138: } elsif ($which eq '64bit') {
5139: return &rndseed_64bit($symb,$courseid,$domain,$username);
5140: }
5141: return &rndseed_32bit($symb,$courseid,$domain,$username);
5142: }
5143:
5144: sub rndseed_32bit {
5145: my ($symb,$courseid,$domain,$username)=@_;
5146: {
5147: use integer;
5148: my $symbchck=unpack("%32C*",$symb) << 27;
5149: my $symbseed=numval($symb) << 22;
5150: my $namechck=unpack("%32C*",$username) << 17;
5151: my $nameseed=numval($username) << 12;
5152: my $domainseed=unpack("%32C*",$domain) << 7;
5153: my $courseseed=unpack("%32C*",$courseid);
5154: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
5155: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5156: #&Apache::lonxml::debug("rndseed :$num:$symb");
5157: if ($_64bit) { $num=(($num<<32)>>32); }
5158: return $num;
5159: }
5160: }
5161:
5162: sub rndseed_64bit {
5163: my ($symb,$courseid,$domain,$username)=@_;
5164: {
5165: use integer;
5166: my $symbchck=unpack("%32S*",$symb) << 21;
5167: my $symbseed=numval($symb) << 10;
5168: my $namechck=unpack("%32S*",$username);
5169:
5170: my $nameseed=numval($username) << 21;
5171: my $domainseed=unpack("%32S*",$domain) << 10;
5172: my $courseseed=unpack("%32S*",$courseid);
5173:
5174: my $num1=$symbchck+$symbseed+$namechck;
5175: my $num2=$nameseed+$domainseed+$courseseed;
5176: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5177: #&Apache::lonxml::debug("rndseed :$num:$symb");
5178: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5179: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5180: return "$num1,$num2";
5181: }
5182: }
5183:
5184: sub rndseed_64bit2 {
5185: my ($symb,$courseid,$domain,$username)=@_;
5186: {
5187: use integer;
5188: # strings need to be an even # of cahracters long, it it is odd the
5189: # last characters gets thrown away
5190: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5191: my $symbseed=numval($symb) << 10;
5192: my $namechck=unpack("%32S*",$username.' ');
5193:
5194: my $nameseed=numval($username) << 21;
5195: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5196: my $courseseed=unpack("%32S*",$courseid.' ');
5197:
5198: my $num1=$symbchck+$symbseed+$namechck;
5199: my $num2=$nameseed+$domainseed+$courseseed;
5200: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5201: #&Apache::lonxml::debug("rndseed :$num:$symb");
5202: return "$num1,$num2";
5203: }
5204: }
5205:
5206: sub rndseed_64bit3 {
5207: my ($symb,$courseid,$domain,$username)=@_;
5208: {
5209: use integer;
5210: # strings need to be an even # of cahracters long, it it is odd the
5211: # last characters gets thrown away
5212: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5213: my $symbseed=numval2($symb) << 10;
5214: my $namechck=unpack("%32S*",$username.' ');
5215:
5216: my $nameseed=numval2($username) << 21;
5217: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5218: my $courseseed=unpack("%32S*",$courseid.' ');
5219:
5220: my $num1=$symbchck+$symbseed+$namechck;
5221: my $num2=$nameseed+$domainseed+$courseseed;
5222: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5223: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5224: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5225:
5226: return "$num1:$num2";
5227: }
5228: }
5229:
5230: sub rndseed_64bit4 {
5231: my ($symb,$courseid,$domain,$username)=@_;
5232: {
5233: use integer;
5234: # strings need to be an even # of cahracters long, it it is odd the
5235: # last characters gets thrown away
5236: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5237: my $symbseed=numval3($symb) << 10;
5238: my $namechck=unpack("%32S*",$username.' ');
5239:
5240: my $nameseed=numval3($username) << 21;
5241: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5242: my $courseseed=unpack("%32S*",$courseid.' ');
5243:
5244: my $num1=$symbchck+$symbseed+$namechck;
5245: my $num2=$nameseed+$domainseed+$courseseed;
5246: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5247: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5248: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5249:
5250: return "$num1:$num2";
5251: }
5252: }
5253:
5254: sub rndseed_CODE_64bit {
5255: my ($symb,$courseid,$domain,$username)=@_;
5256: {
5257: use integer;
5258: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5259: my $symbseed=numval2($symb);
5260: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5261: my $CODEseed=numval(&getCODE());
5262: my $courseseed=unpack("%32S*",$courseid.' ');
5263: my $num1=$symbseed+$CODEchck;
5264: my $num2=$CODEseed+$courseseed+$symbchck;
5265: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5266: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5267: if ($_64bit) { $num1=(($num1<<32)>>32); }
5268: if ($_64bit) { $num2=(($num2<<32)>>32); }
5269: return "$num1:$num2";
5270: }
5271: }
5272:
5273: sub rndseed_CODE_64bit4 {
5274: my ($symb,$courseid,$domain,$username)=@_;
5275: {
5276: use integer;
5277: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5278: my $symbseed=numval3($symb);
5279: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5280: my $CODEseed=numval3(&getCODE());
5281: my $courseseed=unpack("%32S*",$courseid.' ');
5282: my $num1=$symbseed+$CODEchck;
5283: my $num2=$CODEseed+$courseseed+$symbchck;
5284: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5285: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5286: if ($_64bit) { $num1=(($num1<<32)>>32); }
5287: if ($_64bit) { $num2=(($num2<<32)>>32); }
5288: return "$num1:$num2";
5289: }
5290: }
5291:
5292: sub setup_random_from_rndseed {
5293: my ($rndseed)=@_;
5294: if ($rndseed =~/([,:])/) {
5295: my ($num1,$num2)=split(/[,:]/,$rndseed);
5296: &Math::Random::random_set_seed(abs($num1),abs($num2));
5297: } else {
5298: &Math::Random::random_set_seed_from_phrase($rndseed);
5299: }
5300: }
5301:
5302: sub latest_receipt_algorithm_id {
5303: return 'receipt2';
5304: }
5305:
5306: sub recunique {
5307: my $fucourseid=shift;
5308: my $unique;
5309: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5310: $unique=$ENV{"course.$fucourseid.internal.encseed"};
5311: } else {
5312: $unique=$perlvar{'lonReceipt'};
5313: }
5314: return unpack("%32C*",$unique);
5315: }
5316:
5317: sub recprefix {
5318: my $fucourseid=shift;
5319: my $prefix;
5320: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5321: $prefix=$ENV{"course.$fucourseid.internal.encpref"};
5322: } else {
5323: $prefix=$perlvar{'lonHostID'};
5324: }
5325: return unpack("%32C*",$prefix);
5326: }
5327:
5328: sub ireceipt {
5329: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
5330: my $cuname=unpack("%32C*",$funame);
5331: my $cudom=unpack("%32C*",$fudom);
5332: my $cucourseid=unpack("%32C*",$fucourseid);
5333: my $cusymb=unpack("%32C*",$fusymb);
5334: my $cunique=&recunique($fucourseid);
5335: my $cpart=unpack("%32S*",$part);
5336: my $return =&recprefix($fucourseid).'-';
5337: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
5338: $ENV{'request.state'} eq 'construct') {
5339: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
5340: " and ".($cpart%$cudom));
5341:
5342: $return.= ($cunique%$cuname+
5343: $cunique%$cudom+
5344: $cusymb%$cuname+
5345: $cusymb%$cudom+
5346: $cucourseid%$cuname+
5347: $cucourseid%$cudom+
5348: $cpart%$cuname+
5349: $cpart%$cudom);
5350: } else {
5351: $return.= ($cunique%$cuname+
5352: $cunique%$cudom+
5353: $cusymb%$cuname+
5354: $cusymb%$cudom+
5355: $cucourseid%$cuname+
5356: $cucourseid%$cudom);
5357: }
5358: return $return;
5359: }
5360:
5361: sub receipt {
5362: my ($part)=@_;
5363: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5364: return &ireceipt($name,$domain,$courseid,$symb,$part);
5365: }
5366:
5367: # ------------------------------------------------------------ Serves up a file
5368: # returns either the contents of the file or
5369: # -1 if the file doesn't exist
5370: #
5371: # if the target is a file that was uploaded via DOCS,
5372: # a check will be made to see if a current copy exists on the local server,
5373: # if it does this will be served, otherwise a copy will be retrieved from
5374: # the home server for the course and stored in /home/httpd/html/userfiles on
5375: # the local server.
5376:
5377: sub getfile {
5378: my ($file) = @_;
5379:
5380: if ($file =~ m|^/*uploaded/|) { $file=&filelocation("",$file); }
5381: &repcopy($file);
5382: return &readfile($file);
5383: }
5384:
5385: sub repcopy_userfile {
5386: my ($file)=@_;
5387:
5388: if ($file =~ m|^/*uploaded/|) { $file=&filelocation("",$file); }
5389: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return OK; }
5390:
5391: my ($cdom,$cnum,$filename) =
5392: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5393: my ($info,$rtncode);
5394: my $uri="/uploaded/$cdom/$cnum/$filename";
5395: if (-e "$file") {
5396: my @fileinfo = stat($file);
5397: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5398: if ($lwpresp ne 'ok') {
5399: if ($rtncode eq '404') {
5400: unlink($file);
5401: }
5402: #my $ua=new LWP::UserAgent;
5403: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5404: #my $response=$ua->request($request);
5405: #if ($response->is_success()) {
5406: # return $response->content;
5407: # } else {
5408: # return -1;
5409: # }
5410: return -1;
5411: }
5412: if ($info < $fileinfo[9]) {
5413: return OK;
5414: }
5415: $info = '';
5416: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5417: if ($lwpresp ne 'ok') {
5418: return -1;
5419: }
5420: } else {
5421: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5422: if ($lwpresp ne 'ok') {
5423: my $ua=new LWP::UserAgent;
5424: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5425: my $response=$ua->request($request);
5426: if ($response->is_success()) {
5427: $info=$response->content;
5428: } else {
5429: return -1;
5430: }
5431: }
5432: my @parts = ($cdom,$cnum);
5433: if ($filename =~ m|^(.+)/[^/]+$|) {
5434: push @parts, split(/\//,$1);
5435: }
5436: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
5437: foreach my $part (@parts) {
5438: $path .= '/'.$part;
5439: if (!-e $path) {
5440: mkdir($path,0770);
5441: }
5442: }
5443: }
5444: open(FILE,">$file");
5445: print FILE $info;
5446: close(FILE);
5447: return OK;
5448: }
5449:
5450: sub tokenwrapper {
5451: my $uri=shift;
5452: $uri=~s|^http\://([^/]+)||;
5453: $uri=~s|^/||;
5454: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
5455: my $token=$1;
5456: my (undef,$udom,$uname,$file)=split('/',$uri,4);
5457: if ($udom && $uname && $file) {
5458: $file=~s|(\?\.*)*$||;
5459: &appenv("userfile.$udom/$uname/$file" => $ENV{'request.course.id'});
5460: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
5461: (($uri=~/\?/)?'&':'?').'token='.$token.
5462: '&tokenissued='.$perlvar{'lonHostID'};
5463: } else {
5464: return '/adm/notfound.html';
5465: }
5466: }
5467:
5468: sub getuploaded {
5469: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5470: $uri=~s/^\///;
5471: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
5472: my $ua=new LWP::UserAgent;
5473: my $request=new HTTP::Request($reqtype,$uri);
5474: my $response=$ua->request($request);
5475: $$rtncode = $response->code;
5476: if (! $response->is_success()) {
5477: return 'failed';
5478: }
5479: if ($reqtype eq 'HEAD') {
5480: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
5481: } elsif ($reqtype eq 'GET') {
5482: $$info = $response->content;
5483: }
5484: return 'ok';
5485: }
5486:
5487: sub readfile {
5488: my $file = shift;
5489: if ( (! -e $file ) || ($file eq '') ) { return -1; };
5490: my $fh;
5491: open($fh,"<$file");
5492: my $a='';
5493: while (<$fh>) { $a .=$_; }
5494: return $a;
5495: }
5496:
5497: sub filelocation {
5498: my ($dir,$file) = @_;
5499: my $location;
5500: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
5501: if ($file=~m:^/~:) { # is a contruction space reference
5502: $location = $file;
5503: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
5504: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
5505: my ($udom,$uname,$filename)=
5506: ($file=~m|^/+uploaded/+([^/]+)/+([^/]+)/+(.*)$|);
5507: my $home=&homeserver($uname,$udom);
5508: my $is_me=0;
5509: my @ids=¤t_machine_ids();
5510: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
5511: if ($is_me) {
5512: $location=&Apache::loncommon::propath($udom,$uname).
5513: '/userfiles/'.$filename;
5514: } else {
5515: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
5516: $udom.'/'.$uname.'/'.$filename;
5517: }
5518: } else {
5519: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5520: $file=~s:^/res/:/:;
5521: if ( !( $file =~ m:^/:) ) {
5522: $location = $dir. '/'.$file;
5523: } else {
5524: $location = '/home/httpd/html/res'.$file;
5525: }
5526: }
5527: $location=~s://+:/:g; # remove duplicate /
5528: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
5529: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
5530: return $location;
5531: }
5532:
5533: sub hreflocation {
5534: my ($dir,$file)=@_;
5535: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
5536: my $finalpath=filelocation($dir,$file);
5537: $finalpath=~s-^/home/httpd/html--;
5538: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
5539: return $finalpath;
5540: } elsif ($file=~m-^/home-) {
5541: $file=~s-^/home/httpd/html--;
5542: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
5543: return $file;
5544: }
5545: return $file;
5546: }
5547:
5548: sub current_machine_domains {
5549: my $hostname=$hostname{$perlvar{'lonHostID'}};
5550: my @domains;
5551: while( my($id, $name) = each(%hostname)) {
5552: # &logthis("-$id-$name-$hostname-");
5553: if ($hostname eq $name) {
5554: push(@domains,$hostdom{$id});
5555: }
5556: }
5557: return @domains;
5558: }
5559:
5560: sub current_machine_ids {
5561: my $hostname=$hostname{$perlvar{'lonHostID'}};
5562: my @ids;
5563: while( my($id, $name) = each(%hostname)) {
5564: # &logthis("-$id-$name-$hostname-");
5565: if ($hostname eq $name) {
5566: push(@ids,$id);
5567: }
5568: }
5569: return @ids;
5570: }
5571:
5572: # ------------------------------------------------------------- Declutters URLs
5573:
5574: sub declutter {
5575: my $thisfn=shift;
5576: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5577: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5578: $thisfn=~s/^\///;
5579: $thisfn=~s/^res\///;
5580: $thisfn=~s/\?.+$//;
5581: return $thisfn;
5582: }
5583:
5584: # ------------------------------------------------------------- Clutter up URLs
5585:
5586: sub clutter {
5587: my $thisfn='/'.&declutter(shift);
5588: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv|public)\//) {
5589: $thisfn='/res'.$thisfn;
5590: }
5591: return $thisfn;
5592: }
5593:
5594: sub freeze_escape {
5595: my ($value)=@_;
5596: if (ref($value)) {
5597: $value=&nfreeze($value);
5598: return '__FROZEN__'.&escape($value);
5599: }
5600: return &escape($value);
5601: }
5602:
5603: # -------------------------------------------------------- Escape Special Chars
5604:
5605: sub escape {
5606: my $str=shift;
5607: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
5608: return $str;
5609: }
5610:
5611: # ----------------------------------------------------- Un-Escape Special Chars
5612:
5613: sub unescape {
5614: my $str=shift;
5615: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
5616: return $str;
5617: }
5618:
5619: sub thaw_unescape {
5620: my ($value)=@_;
5621: if ($value =~ /^__FROZEN__/) {
5622: substr($value,0,10,undef);
5623: $value=&unescape($value);
5624: return &thaw($value);
5625: }
5626: return &unescape($value);
5627: }
5628:
5629: sub mod_perl_version {
5630: return 1;
5631: if (defined($perlvar{'MODPERL2'})) {
5632: return 2;
5633: }
5634: }
5635:
5636: sub correct_line_ends {
5637: my ($result)=@_;
5638: $$result =~s/\r\n/\n/mg;
5639: $$result =~s/\r/\n/mg;
5640: }
5641: # ================================================================ Main Program
5642:
5643: sub goodbye {
5644: &logthis("Starting Shut down");
5645: #not converted to using infrastruture and probably shouldn't be
5646: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
5647: #converted
5648: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
5649: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
5650: &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
5651: &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
5652: #1.1 only
5653: &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
5654: &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
5655: &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
5656: &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
5657: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
5658: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
5659: &flushcourselogs();
5660: &logthis("Shutting down");
5661: return DONE;
5662: }
5663:
5664: BEGIN {
5665: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
5666: unless ($readit) {
5667: {
5668: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
5669: open(my $config,"</etc/httpd/conf/loncapa.conf");
5670:
5671: while (my $configline=<$config>) {
5672: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
5673: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5674: chomp($varvalue);
5675: $perlvar{$varname}=$varvalue;
5676: }
5677: }
5678: close($config);
5679: }
5680: {
5681: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
5682:
5683: while (my $configline=<$config>) {
5684: if ($configline =~ /^[^\#]*PerlSetVar/) {
5685: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5686: chomp($varvalue);
5687: $perlvar{$varname}=$varvalue;
5688: }
5689: }
5690: close($config);
5691: }
5692:
5693: # ------------------------------------------------------------ Read domain file
5694: {
5695: %domaindescription = ();
5696: %domain_auth_def = ();
5697: %domain_auth_arg_def = ();
5698: my $fh;
5699: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
5700: while (<$fh>) {
5701: next if (/^(\#|\s*$)/);
5702: # next if /^\#/;
5703: chomp;
5704: my ($domain, $domain_description, $def_auth, $def_auth_arg,
5705: $def_lang, $city, $longi, $lati) = split(/:/,$_);
5706: $domain_auth_def{$domain}=$def_auth;
5707: $domain_auth_arg_def{$domain}=$def_auth_arg;
5708: $domaindescription{$domain}=$domain_description;
5709: $domain_lang_def{$domain}=$def_lang;
5710: $domain_city{$domain}=$city;
5711: $domain_longi{$domain}=$longi;
5712: $domain_lati{$domain}=$lati;
5713:
5714: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
5715: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
5716: }
5717: }
5718: close ($fh);
5719: }
5720:
5721:
5722: # ------------------------------------------------------------- Read hosts file
5723: {
5724: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
5725:
5726: while (my $configline=<$config>) {
5727: next if ($configline =~ /^(\#|\s*$)/);
5728: chomp($configline);
5729: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
5730: if ($id && $domain && $role && $name && $ip) {
5731: $hostname{$id}=$name;
5732: $hostdom{$id}=$domain;
5733: $hostip{$id}=$ip;
5734: $iphost{$ip}=$id;
5735: if ($role eq 'library') { $libserv{$id}=$name; }
5736: }
5737: }
5738: close($config);
5739: }
5740:
5741: # ------------------------------------------------------ Read spare server file
5742: {
5743: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
5744:
5745: while (my $configline=<$config>) {
5746: chomp($configline);
5747: if ($configline) {
5748: $spareid{$configline}=1;
5749: }
5750: }
5751: close($config);
5752: }
5753: # ------------------------------------------------------------ Read permissions
5754: {
5755: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
5756:
5757: while (my $configline=<$config>) {
5758: chomp($configline);
5759: if ($configline) {
5760: my ($role,$perm)=split(/ /,$configline);
5761: if ($perm ne '') { $pr{$role}=$perm; }
5762: }
5763: }
5764: close($config);
5765: }
5766:
5767: # -------------------------------------------- Read plain texts for permissions
5768: {
5769: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
5770:
5771: while (my $configline=<$config>) {
5772: chomp($configline);
5773: if ($configline) {
5774: my ($short,$plain)=split(/:/,$configline);
5775: if ($plain ne '') { $prp{$short}=$plain; }
5776: }
5777: }
5778: close($config);
5779: }
5780:
5781: # ---------------------------------------------------------- Read package table
5782: {
5783: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
5784:
5785: while (my $configline=<$config>) {
5786: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
5787: chomp($configline);
5788: my ($short,$plain)=split(/:/,$configline);
5789: my ($pack,$name)=split(/\&/,$short);
5790: if ($plain ne '') {
5791: $packagetab{$pack.'&'.$name.'&name'}=$name;
5792: $packagetab{$short}=$plain;
5793: }
5794: }
5795: close($config);
5796: }
5797:
5798: # ------------- set up temporary directory
5799: {
5800: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
5801:
5802: }
5803:
5804: $metacache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
5805:
5806: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
5807: $dumpcount=0;
5808:
5809: &logtouch();
5810: &logthis('<font color=yellow>INFO: Read configuration</font>');
5811: $readit=1;
5812: {
5813: use integer;
5814: my $test=(2**32)+1;
5815: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
5816: &logthis(" Detected 64bit platform ($_64bit)");
5817: }
5818: }
5819: }
5820:
5821: 1;
5822: __END__
5823:
5824: =pod
5825:
5826: =head1 NAME
5827:
5828: Apache::lonnet - Subroutines to ask questions about things in the network.
5829:
5830: =head1 SYNOPSIS
5831:
5832: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
5833:
5834: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
5835:
5836: Common parameters:
5837:
5838: =over 4
5839:
5840: =item *
5841:
5842: $uname : an internal username (if $cname expecting a course Id specifically)
5843:
5844: =item *
5845:
5846: $udom : a domain (if $cdom expecting a course's domain specifically)
5847:
5848: =item *
5849:
5850: $symb : a resource instance identifier
5851:
5852: =item *
5853:
5854: $namespace : the name of a .db file that contains the data needed or
5855: being set.
5856:
5857: =back
5858:
5859: =head1 OVERVIEW
5860:
5861: lonnet provides subroutines which interact with the
5862: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
5863: about classes, users, and resources.
5864:
5865: For many of these objects you can also use this to store data about
5866: them or modify them in various ways.
5867:
5868: =head2 Symbs
5869:
5870: To identify a specific instance of a resource, LON-CAPA uses symbols
5871: or "symbs"X<symb>. These identifiers are built from the URL of the
5872: map, the resource number of the resource in the map, and the URL of
5873: the resource itself. The latter is somewhat redundant, but might help
5874: if maps change.
5875:
5876: An example is
5877:
5878: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
5879:
5880: The respective map entry is
5881:
5882: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5883: title="Problem 2">
5884: </resource>
5885:
5886: Symbs are used by the random number generator, as well as to store and
5887: restore data specific to a certain instance of for example a problem.
5888:
5889: =head2 Storing And Retrieving Data
5890:
5891: X<store()>X<cstore()>X<restore()>Three of the most important functions
5892: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5893: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5894: is is the non-critical message twin of cstore. These functions are for
5895: handlers to store a perl hash to a user's permanent data space in an
5896: easy manner, and to retrieve it again on another call. It is expected
5897: that a handler would use this once at the beginning to retrieve data,
5898: and then again once at the end to send only the new data back.
5899:
5900: The data is stored in the user's data directory on the user's
5901: homeserver under the ID of the course.
5902:
5903: The hash that is returned by restore will have all of the previous
5904: value for all of the elements of the hash.
5905:
5906: Example:
5907:
5908: #creating a hash
5909: my %hash;
5910: $hash{'foo'}='bar';
5911:
5912: #storing it
5913: &Apache::lonnet::cstore(\%hash);
5914:
5915: #changing a value
5916: $hash{'foo'}='notbar';
5917:
5918: #adding a new value
5919: $hash{'bar'}='foo';
5920: &Apache::lonnet::cstore(\%hash);
5921:
5922: #retrieving the hash
5923: my %history=&Apache::lonnet::restore();
5924:
5925: #print the hash
5926: foreach my $key (sort(keys(%history))) {
5927: print("\%history{$key} = $history{$key}");
5928: }
5929:
5930: Will print out:
5931:
5932: %history{1:foo} = bar
5933: %history{1:keys} = foo:timestamp
5934: %history{1:timestamp} = 990455579
5935: %history{2:bar} = foo
5936: %history{2:foo} = notbar
5937: %history{2:keys} = foo:bar:timestamp
5938: %history{2:timestamp} = 990455580
5939: %history{bar} = foo
5940: %history{foo} = notbar
5941: %history{timestamp} = 990455580
5942: %history{version} = 2
5943:
5944: Note that the special hash entries C<keys>, C<version> and
5945: C<timestamp> were added to the hash. C<version> will be equal to the
5946: total number of versions of the data that have been stored. The
5947: C<timestamp> attribute will be the UNIX time the hash was
5948: stored. C<keys> is available in every historical section to list which
5949: keys were added or changed at a specific historical revision of a
5950: hash.
5951:
5952: B<Warning>: do not store the hash that restore returns directly. This
5953: will cause a mess since it will restore the historical keys as if the
5954: were new keys. I.E. 1:foo will become 1:1:foo etc.
5955:
5956: Calling convention:
5957:
5958: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5959: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
5960:
5961: For more detailed information, see lonnet specific documentation.
5962:
5963: =head1 RETURN MESSAGES
5964:
5965: =over 4
5966:
5967: =item * B<con_lost>: unable to contact remote host
5968:
5969: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5970: when the connection is brought back up
5971:
5972: =item * B<con_failed>: unable to contact remote host and unable to save message
5973: for later delivery
5974:
5975: =item * B<error:>: an error a occured, a description of the error follows the :
5976:
5977: =item * B<no_such_host>: unable to fund a host associated with the user/domain
5978: that was requested
5979:
5980: =back
5981:
5982: =head1 PUBLIC SUBROUTINES
5983:
5984: =head2 Session Environment Functions
5985:
5986: =over 4
5987:
5988: =item *
5989: X<appenv()>
5990: B<appenv(%hash)>: the value of %hash is written to
5991: the user envirnoment file, and will be restored for each access this
5992: user makes during this session, also modifies the %ENV for the current
5993: process
5994:
5995: =item *
5996: X<delenv()>
5997: B<delenv($regexp)>: removes all items from the session
5998: environment file that matches the regular expression in $regexp. The
5999: values are also delted from the current processes %ENV.
6000:
6001: =back
6002:
6003: =head2 User Information
6004:
6005: =over 4
6006:
6007: =item *
6008: X<queryauthenticate()>
6009: B<queryauthenticate($uname,$udom)>: try to determine user's current
6010: authentication scheme
6011:
6012: =item *
6013: X<authenticate()>
6014: B<authenticate($uname,$upass,$udom)>: try to
6015: authenticate user from domain's lib servers (first use the current
6016: one). C<$upass> should be the users password.
6017:
6018: =item *
6019: X<homeserver()>
6020: B<homeserver($uname,$udom)>: find the server which has
6021: the user's directory and files (there must be only one), this caches
6022: the answer, and also caches if there is a borken connection.
6023:
6024: =item *
6025: X<idget()>
6026: B<idget($udom,@ids)>: find the usernames behind a list of IDs
6027: (IDs are a unique resource in a domain, there must be only 1 ID per
6028: username, and only 1 username per ID in a specific domain) (returns
6029: hash: id=>name,id=>name)
6030:
6031: =item *
6032: X<idrget()>
6033: B<idrget($udom,@unames)>: find the IDs behind a list of
6034: usernames (returns hash: name=>id,name=>id)
6035:
6036: =item *
6037: X<idput()>
6038: B<idput($udom,%ids)>: store away a list of names and associated IDs
6039:
6040: =item *
6041: X<rolesinit()>
6042: B<rolesinit($udom,$username,$authhost)>: get user privileges
6043:
6044: =item *
6045: X<getsection()>
6046: B<getsection($udom,$uname,$cname)>: finds the section of student in the
6047: course $cname, return section name/number or '' for "not in course"
6048: and '-1' for "no section"
6049:
6050: =item *
6051: X<userenvironment()>
6052: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
6053: passed in @what from the requested user's environment, returns a hash
6054:
6055: =back
6056:
6057: =head2 User Roles
6058:
6059: =over 4
6060:
6061: =item *
6062:
6063: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
6064: actions
6065: F: full access
6066: U,I,K: authentication modes (cxx only)
6067: '': forbidden
6068: 1: user needs to choose course
6069: 2: browse allowed
6070:
6071: =item *
6072:
6073: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
6074: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
6075: and course level
6076:
6077: =item *
6078:
6079: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
6080: explanation of a user role term
6081:
6082: =back
6083:
6084: =head2 User Modification
6085:
6086: =over 4
6087:
6088: =item *
6089:
6090: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
6091: user for the level given by URL. Optional start and end dates (leave empty
6092: string or zero for "no date")
6093:
6094: =item *
6095:
6096: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
6097: change a users, password, possible return values are: ok,
6098: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
6099: refused
6100:
6101: =item *
6102:
6103: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
6104:
6105: =item *
6106:
6107: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
6108: modify user
6109:
6110: =item *
6111:
6112: modifystudent
6113:
6114: modify a students enrollment and identification information.
6115: The course id is resolved based on the current users environment.
6116: This means the envoking user must be a course coordinator or otherwise
6117: associated with a course.
6118:
6119: This call is essentially a wrapper for lonnet::modifyuser and
6120: lonnet::modify_student_enrollment
6121:
6122: Inputs:
6123:
6124: =over 4
6125:
6126: =item B<$udom> Students loncapa domain
6127:
6128: =item B<$uname> Students loncapa login name
6129:
6130: =item B<$uid> Students id/student number
6131:
6132: =item B<$umode> Students authentication mode
6133:
6134: =item B<$upass> Students password
6135:
6136: =item B<$first> Students first name
6137:
6138: =item B<$middle> Students middle name
6139:
6140: =item B<$last> Students last name
6141:
6142: =item B<$gene> Students generation
6143:
6144: =item B<$usec> Students section in course
6145:
6146: =item B<$end> Unix time of the roles expiration
6147:
6148: =item B<$start> Unix time of the roles start date
6149:
6150: =item B<$forceid> If defined, allow $uid to be changed
6151:
6152: =item B<$desiredhome> server to use as home server for student
6153:
6154: =back
6155:
6156: =item *
6157:
6158: modify_student_enrollment
6159:
6160: Change a students enrollment status in a class. The environment variable
6161: 'role.request.course' must be defined for this function to proceed.
6162:
6163: Inputs:
6164:
6165: =over 4
6166:
6167: =item $udom, students domain
6168:
6169: =item $uname, students name
6170:
6171: =item $uid, students user id
6172:
6173: =item $first, students first name
6174:
6175: =item $middle
6176:
6177: =item $last
6178:
6179: =item $gene
6180:
6181: =item $usec
6182:
6183: =item $end
6184:
6185: =item $start
6186:
6187: =back
6188:
6189:
6190: =item *
6191:
6192: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
6193: custom role; give a custom role to a user for the level given by URL. Specify
6194: name and domain of role author, and role name
6195:
6196: =item *
6197:
6198: revokerole($udom,$uname,$url,$role) : revoke a role for url
6199:
6200: =item *
6201:
6202: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
6203:
6204: =back
6205:
6206: =head2 Course Infomation
6207:
6208: =over 4
6209:
6210: =item *
6211:
6212: coursedescription($courseid) : course description
6213:
6214: =item *
6215:
6216: courseresdata($coursenum,$coursedomain,@which) : request for current
6217: parameter setting for a specific course, @what should be a list of
6218: parameters to ask about. This routine caches answers for 5 minutes.
6219:
6220: =back
6221:
6222: =head2 Course Modification
6223:
6224: =over 4
6225:
6226: =item *
6227:
6228: writecoursepref($courseid,%prefs) : write preferences (environment
6229: database) for a course
6230:
6231: =item *
6232:
6233: createcourse($udom,$description,$url) : make/modify course
6234:
6235: =back
6236:
6237: =head2 Resource Subroutines
6238:
6239: =over 4
6240:
6241: =item *
6242:
6243: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
6244:
6245: =item *
6246:
6247: repcopy($filename) : subscribes to the requested file, and attempts to
6248: replicate from the owning library server, Might return
6249: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
6250: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
6251: resource. Expects the local filesystem pathname
6252: (/home/httpd/html/res/....)
6253:
6254: =back
6255:
6256: =head2 Resource Information
6257:
6258: =over 4
6259:
6260: =item *
6261:
6262: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
6263: a vairety of different possible values, $varname should be a request
6264: string, and the other parameters can be used to specify who and what
6265: one is asking about.
6266:
6267: Possible values for $varname are environment.lastname (or other item
6268: from the envirnment hash), user.name (or someother aspect about the
6269: user), resource.0.maxtries (or some other part and parameter of a
6270: resource)
6271:
6272: =item *
6273:
6274: directcondval($number) : get current value of a condition; reads from a state
6275: string
6276:
6277: =item *
6278:
6279: condval($condidx) : value of condition index based on state
6280:
6281: =item *
6282:
6283: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
6284: resource's metadata, $what should be either a specific key, or either
6285: 'keys' (to get a list of possible keys) or 'packages' to get a list of
6286: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
6287:
6288: this function automatically caches all requests
6289:
6290: =item *
6291:
6292: metadata_query($query,$custom,$customshow) : make a metadata query against the
6293: network of library servers; returns file handle of where SQL and regex results
6294: will be stored for query
6295:
6296: =item *
6297:
6298: symbread($filename) : return symbolic list entry (filename argument optional);
6299: returns the data handle
6300:
6301: =item *
6302:
6303: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
6304: a possible symb for the URL in $thisfn, and if is an encryypted
6305: resource that the user accessed using /enc/ returns a 1 on success, 0
6306: on failure, user must be in a course, as it assumes the existance of
6307: the course initial hash, and uses $ENV('request.course.id'}
6308:
6309:
6310: =item *
6311:
6312: symbclean($symb) : removes versions numbers from a symb, returns the
6313: cleaned symb
6314:
6315: =item *
6316:
6317: is_on_map($uri) : checks if the $uri is somewhere on the current
6318: course map, user must be in a course for it to work.
6319:
6320: =item *
6321:
6322: numval($salt) : return random seed value (addend for rndseed)
6323:
6324: =item *
6325:
6326: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
6327: a random seed, all arguments are optional, if they aren't sent it uses the
6328: environment to derive them. Note: if symb isn't sent and it can't get one
6329: from &symbread it will use the current time as its return value
6330:
6331: =item *
6332:
6333: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
6334: unfakeable, receipt
6335:
6336: =item *
6337:
6338: receipt() : API to ireceipt working off of ENV values; given out to users
6339:
6340: =item *
6341:
6342: countacc($url) : count the number of accesses to a given URL
6343:
6344: =item *
6345:
6346: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
6347:
6348: =item *
6349:
6350: checkin($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 $tcrsid)
6351:
6352: =item *
6353:
6354: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
6355:
6356: =item *
6357:
6358: devalidate($symb) : devalidate temporary spreadsheet calculations,
6359: forcing spreadsheet to reevaluate the resource scores next time.
6360:
6361: =back
6362:
6363: =head2 Storing/Retreiving Data
6364:
6365: =over 4
6366:
6367: =item *
6368:
6369: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
6370: for this url; hashref needs to be given and should be a \%hashname; the
6371: remaining args aren't required and if they aren't passed or are '' they will
6372: be derived from the ENV
6373:
6374: =item *
6375:
6376: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
6377: uses critical subroutine
6378:
6379: =item *
6380:
6381: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
6382: all args are optional
6383:
6384: =item *
6385:
6386: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
6387: works very similar to store/cstore, but all data is stored in a
6388: temporary location and can be reset using tmpreset, $storehash should
6389: be a hash reference, returns nothing on success
6390:
6391: =item *
6392:
6393: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
6394: similar to restore, but all data is stored in a temporary location and
6395: can be reset using tmpreset. Returns a hash of values on success,
6396: error string otherwise.
6397:
6398: =item *
6399:
6400: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
6401: deltes all keys for $symb form the temporary storage hash.
6402:
6403: =item *
6404:
6405: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6406: reference filled in from namesp ($udom and $uname are optional)
6407:
6408: =item *
6409:
6410: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
6411: namesp ($udom and $uname are optional)
6412:
6413: =item *
6414:
6415: dump($namespace,$udom,$uname,$regexp) :
6416: dumps the complete (or key matching regexp) namespace into a hash
6417: ($udom, $uname and $regexp are optional)
6418:
6419: =item *
6420:
6421: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
6422: $store can be a scalar, an array reference, or if the amount to be
6423: incremented is > 1, a hash reference.
6424:
6425: ($udom and $uname are optional)
6426:
6427: =item *
6428:
6429: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
6430: ($udom and $uname are optional)
6431:
6432: =item *
6433:
6434: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
6435: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
6436: used in records written by &store and retrieved by &restore. This function
6437: was created for use in editing discussion posts, without incrementing the
6438: version number included in the key for a particular post. The colon
6439: separated list of attribute names (e.g., the value associated with the key
6440: 1:keys:$symb) is also generated and passed in the ampersand separated
6441: items sent to lonnet::reply().
6442:
6443: =item *
6444:
6445: cput($namespace,$storehash,$udom,$uname) : critical put
6446: ($udom and $uname are optional)
6447:
6448: =item *
6449:
6450: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6451: reference filled in from namesp (encrypts the return communication)
6452: ($udom and $uname are optional)
6453:
6454: =item *
6455:
6456: log($udom,$name,$home,$message) : write to permanent log for user; use
6457: critical subroutine
6458:
6459: =back
6460:
6461: =head2 Network Status Functions
6462:
6463: =over 4
6464:
6465: =item *
6466:
6467: dirlist($uri) : return directory list based on URI
6468:
6469: =item *
6470:
6471: spareserver() : find server with least workload from spare.tab
6472:
6473: =back
6474:
6475: =head2 Apache Request
6476:
6477: =over 4
6478:
6479: =item *
6480:
6481: ssi($url,%hash) : server side include, does a complete request cycle on url to
6482: localhost, posts hash
6483:
6484: =back
6485:
6486: =head2 Data to String to Data
6487:
6488: =over 4
6489:
6490: =item *
6491:
6492: hash2str(%hash) : convert a hash into a string complete with escaping and '='
6493: and '&' separators, supports elements that are arrayrefs and hashrefs
6494:
6495: =item *
6496:
6497: hashref2str($hashref) : convert a hashref into a string complete with
6498: escaping and '=' and '&' separators, supports elements that are
6499: arrayrefs and hashrefs
6500:
6501: =item *
6502:
6503: arrayref2str($arrayref) : convert an arrayref into a string complete
6504: with escaping and '&' separators, supports elements that are arrayrefs
6505: and hashrefs
6506:
6507: =item *
6508:
6509: str2hash($string) : convert string to hash using unescaping and
6510: splitting on '=' and '&', supports elements that are arrayrefs and
6511: hashrefs
6512:
6513: =item *
6514:
6515: str2array($string) : convert string to hash using unescaping and
6516: splitting on '&', supports elements that are arrayrefs and hashrefs
6517:
6518: =back
6519:
6520: =head2 Logging Routines
6521:
6522: =over 4
6523:
6524: These routines allow one to make log messages in the lonnet.log and
6525: lonnet.perm logfiles.
6526:
6527: =item *
6528:
6529: logtouch() : make sure the logfile, lonnet.log, exists
6530:
6531: =item *
6532:
6533: logthis() : append message to the normal lonnet.log file, it gets
6534: preiodically rolled over and deleted.
6535:
6536: =item *
6537:
6538: logperm() : append a permanent message to lonnet.perm.log, this log
6539: file never gets deleted by any automated portion of the system, only
6540: messages of critical importance should go in here.
6541:
6542: =back
6543:
6544: =head2 General File Helper Routines
6545:
6546: =over 4
6547:
6548: =item *
6549:
6550: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
6551: (a) files in /uploaded
6552: (i) If a local copy of the file exists -
6553: compares modification date of local copy with last-modified date for
6554: definitive version stored on home server for course. If local copy is
6555: stale, requests a new version from the home server and stores it.
6556: If the original has been removed from the home server, then local copy
6557: is unlinked.
6558: (ii) If local copy does not exist -
6559: requests the file from the home server and stores it.
6560:
6561: If $caller is 'uploadrep':
6562: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
6563: for request for files originally uploaded via DOCS.
6564: - returns 'ok' if fresh local copy now available, -1 otherwise.
6565:
6566: Otherwise:
6567: This indicates a call from the content generation phase of the request.
6568: - returns the entire contents of the file or -1.
6569:
6570: (b) files in /res
6571: - returns the entire contents of a file or -1;
6572: it properly subscribes to and replicates the file if neccessary.
6573:
6574: =item *
6575:
6576: filelocation($dir,$file) : returns file system location of a file
6577: based on URI; meant to be "fairly clean" absolute reference, $dir is a
6578: directory that relative $file lookups are to looked in ($dir of /a/dir
6579: and a file of ../bob will become /a/bob)
6580:
6581: =item *
6582:
6583: hreflocation($dir,$file) : returns file system location or a URL; same as
6584: filelocation except for hrefs
6585:
6586: =item *
6587:
6588: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
6589:
6590: =back
6591:
6592: =head2 HTTP Helper Routines
6593:
6594: =over 4
6595:
6596: =item *
6597:
6598: escape() : unpack non-word characters into CGI-compatible hex codes
6599:
6600: =item *
6601:
6602: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
6603:
6604: =back
6605:
6606: =head1 PRIVATE SUBROUTINES
6607:
6608: =head2 Underlying communication routines (Shouldn't call)
6609:
6610: =over 4
6611:
6612: =item *
6613:
6614: subreply() : tries to pass a message to lonc, returns con_lost if incapable
6615:
6616: =item *
6617:
6618: reply() : uses subreply to send a message to remote machine, logs all failures
6619:
6620: =item *
6621:
6622: critical() : passes a critical message to another server; if cannot
6623: get through then place message in connection buffer directory and
6624: returns con_delayed, if incapable of saving message, returns
6625: con_failed
6626:
6627: =item *
6628:
6629: reconlonc() : tries to reconnect lonc client processes.
6630:
6631: =back
6632:
6633: =head2 Resource Access Logging
6634:
6635: =over 4
6636:
6637: =item *
6638:
6639: flushcourselogs() : flush (save) buffer logs and access logs
6640:
6641: =item *
6642:
6643: courselog($what) : save message for course in hash
6644:
6645: =item *
6646:
6647: courseacclog($what) : save message for course using &courselog(). Perform
6648: special processing for specific resource types (problems, exams, quizzes, etc).
6649:
6650: =item *
6651:
6652: goodbye() : flush course logs and log shutting down; it is called in srm.conf
6653: as a PerlChildExitHandler
6654:
6655: =back
6656:
6657: =head2 Other
6658:
6659: =over 4
6660:
6661: =item *
6662:
6663: symblist($mapname,%newhash) : update symbolic storage links
6664:
6665: =back
6666:
6667: =cut
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