1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.619 2005/04/05 20:43:27 albertel Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: package Apache::lonnet;
31:
32: use strict;
33: use LWP::UserAgent();
34: use HTTP::Headers;
35: use HTTP::Date;
36: # use Date::Parse;
37: use vars
38: qw(%perlvar %hostname %badServerCache %iphost %spareid %hostdom
39: %libserv %pr %prp $memcache %packagetab
40: %courselogs %accesshash %userrolehash $processmarker $dumpcount
41: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseinstcodebuf %courseownerbuf
42: %domaindescription %domain_auth_def %domain_auth_arg_def
43: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir $_64bit
44: %env);
45:
46: use IO::Socket;
47: use GDBM_File;
48: use Apache::Constants qw(:common :http);
49: use HTML::LCParser;
50: use Fcntl qw(:flock);
51: use Apache::lonlocal;
52: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw nfreeze);
53: use Time::HiRes qw( gettimeofday tv_interval );
54: use Cache::Memcached;
55: my $readit;
56: my $max_connection_retries = 10; # Or some such value.
57:
58: require Exporter;
59:
60: our @ISA = qw (Exporter);
61: our @EXPORT = qw(%env);
62:
63: =pod
64:
65: =head1 Package Variables
66:
67: These are largely undocumented, so if you decipher one please note it here.
68:
69: =over 4
70:
71: =item $processmarker
72:
73: Contains the time this process was started and this servers host id.
74:
75: =item $dumpcount
76:
77: Counts the number of times a message log flush has been attempted (regardless
78: of success) by this process. Used as part of the filename when messages are
79: delayed.
80:
81: =back
82:
83: =cut
84:
85:
86: # --------------------------------------------------------------------- Logging
87:
88: sub logtouch {
89: my $execdir=$perlvar{'lonDaemons'};
90: unless (-e "$execdir/logs/lonnet.log") {
91: open(my $fh,">>$execdir/logs/lonnet.log");
92: close $fh;
93: }
94: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
95: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
96: }
97:
98: sub logthis {
99: my $message=shift;
100: my $execdir=$perlvar{'lonDaemons'};
101: my $now=time;
102: my $local=localtime($now);
103: if (open(my $fh,">>$execdir/logs/lonnet.log")) {
104: print $fh "$local ($$): $message\n";
105: close($fh);
106: }
107: return 1;
108: }
109:
110: sub logperm {
111: my $message=shift;
112: my $execdir=$perlvar{'lonDaemons'};
113: my $now=time;
114: my $local=localtime($now);
115: if (open(my $fh,">>$execdir/logs/lonnet.perm.log")) {
116: print $fh "$now:$message:$local\n";
117: close($fh);
118: }
119: return 1;
120: }
121:
122: # -------------------------------------------------- Non-critical communication
123: sub subreply {
124: my ($cmd,$server)=@_;
125: my $peerfile="$perlvar{'lonSockDir'}/$server";
126: #
127: # With loncnew process trimming, there's a timing hole between lonc server
128: # process exit and the master server picking up the listen on the AF_UNIX
129: # socket. In that time interval, a lock file will exist:
130:
131: my $lockfile=$peerfile.".lock";
132: while (-e $lockfile) { # Need to wait for the lockfile to disappear.
133: sleep(1);
134: }
135: # At this point, either a loncnew parent is listening or an old lonc
136: # or loncnew child is listening so we can connect or everything's dead.
137: #
138: # We'll give the connection a few tries before abandoning it. If
139: # connection is not possible, we'll con_lost back to the client.
140: #
141: my $client;
142: for (my $retries = 0; $retries < $max_connection_retries; $retries++) {
143: $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
144: Type => SOCK_STREAM,
145: Timeout => 10);
146: if($client) {
147: last; # Connected!
148: }
149: sleep(1); # Try again later if failed connection.
150: }
151: my $answer;
152: if ($client) {
153: print $client "$cmd\n";
154: $answer=<$client>;
155: if (!$answer) { $answer="con_lost"; }
156: chomp($answer);
157: } else {
158: $answer = 'con_lost'; # Failed connection.
159: }
160: return $answer;
161: }
162:
163: sub reply {
164: my ($cmd,$server)=@_;
165: unless (defined($hostname{$server})) { return 'no_such_host'; }
166: my $answer=subreply($cmd,$server);
167: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
168: &logthis("<font color=blue>WARNING:".
169: " $cmd to $server returned $answer</font>");
170: }
171: return $answer;
172: }
173:
174: # ----------------------------------------------------------- Send USR1 to lonc
175:
176: sub reconlonc {
177: my $peerfile=shift;
178: &logthis("Trying to reconnect for $peerfile");
179: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
180: if (open(my $fh,"<$loncfile")) {
181: my $loncpid=<$fh>;
182: chomp($loncpid);
183: if (kill 0 => $loncpid) {
184: &logthis("lonc at pid $loncpid responding, sending USR1");
185: kill USR1 => $loncpid;
186: sleep 1;
187: if (-e "$peerfile") { return; }
188: &logthis("$peerfile still not there, give it another try");
189: sleep 5;
190: if (-e "$peerfile") { return; }
191: &logthis(
192: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
193: } else {
194: &logthis(
195: "<font color=blue>WARNING:".
196: " lonc at pid $loncpid not responding, giving up</font>");
197: }
198: } else {
199: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
200: }
201: }
202:
203: # ------------------------------------------------------ Critical communication
204:
205: sub critical {
206: my ($cmd,$server)=@_;
207: unless ($hostname{$server}) {
208: &logthis("<font color=blue>WARNING:".
209: " Critical message to unknown server ($server)</font>");
210: return 'no_such_host';
211: }
212: my $answer=reply($cmd,$server);
213: if ($answer eq 'con_lost') {
214: &reconlonc("$perlvar{'lonSockDir'}/$server");
215: my $answer=reply($cmd,$server);
216: if ($answer eq 'con_lost') {
217: my $now=time;
218: my $middlename=$cmd;
219: $middlename=substr($middlename,0,16);
220: $middlename=~s/\W//g;
221: my $dfilename=
222: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
223: $dumpcount++;
224: {
225: my $dfh;
226: if (open($dfh,">$dfilename")) {
227: print $dfh "$cmd\n";
228: close($dfh);
229: }
230: }
231: sleep 2;
232: my $wcmd='';
233: {
234: my $dfh;
235: if (open($dfh,"<$dfilename")) {
236: $wcmd=<$dfh>;
237: close($dfh);
238: }
239: }
240: chomp($wcmd);
241: if ($wcmd eq $cmd) {
242: &logthis("<font color=blue>WARNING: ".
243: "Connection buffer $dfilename: $cmd</font>");
244: &logperm("D:$server:$cmd");
245: return 'con_delayed';
246: } else {
247: &logthis("<font color=red>CRITICAL:"
248: ." Critical connection failed: $server $cmd</font>");
249: &logperm("F:$server:$cmd");
250: return 'con_failed';
251: }
252: }
253: }
254: return $answer;
255: }
256:
257: #
258: # -------------- Remove all key from the env that start witha lowercase letter
259: # (Which is always a lon-capa value)
260:
261: sub cleanenv {
262: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
263: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
264: foreach my $key (keys(%ENV)) {
265: if ($key =~ /^[a-z]/) {
266: delete($ENV{$key});
267: }
268: }
269: }
270:
271: # ------------------------------------------- Transfer profile into environment
272:
273: sub transfer_profile_to_env {
274: my ($lonidsdir,$handle)=@_;
275: my @profile;
276: {
277: open(my $idf,"$lonidsdir/$handle.id");
278: flock($idf,LOCK_SH);
279: @profile=<$idf>;
280: close($idf);
281: }
282: my $envi;
283: my %Remove;
284: for ($envi=0;$envi<=$#profile;$envi++) {
285: chomp($profile[$envi]);
286: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
287: $ENV{$envname} = $envvalue;
288: $env{$envname} = $envvalue;
289: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
290: if ($time < time-300) {
291: $Remove{$key}++;
292: }
293: }
294: }
295: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
296: $env{'user.environment'} = "$lonidsdir/$handle.id";
297: foreach my $expired_key (keys(%Remove)) {
298: &delenv($expired_key);
299: }
300: }
301:
302: # ---------------------------------------------------------- Append Environment
303:
304: sub appenv {
305: my %newenv=@_;
306: foreach (keys %newenv) {
307: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
308: &logthis("<font color=blue>WARNING: ".
309: "Attempt to modify environment ".$_." to ".$newenv{$_}
310: .'</font>');
311: delete($newenv{$_});
312: } else {
313: $ENV{$_}=$newenv{$_};
314: $env{$_}=$newenv{$_};
315: }
316: }
317:
318: my $lockfh;
319: unless (open($lockfh,"$ENV{'user.environment'}")) {
320: return 'error: '.$!;
321: }
322: unless (flock($lockfh,LOCK_EX)) {
323: &logthis("<font color=blue>WARNING: ".
324: 'Could not obtain exclusive lock in appenv: '.$!);
325: close($lockfh);
326: return 'error: '.$!;
327: }
328:
329: my @oldenv;
330: {
331: my $fh;
332: unless (open($fh,"$ENV{'user.environment'}")) {
333: return 'error: '.$!;
334: }
335: @oldenv=<$fh>;
336: close($fh);
337: }
338: for (my $i=0; $i<=$#oldenv; $i++) {
339: chomp($oldenv[$i]);
340: if ($oldenv[$i] ne '') {
341: my ($name,$value)=split(/=/,$oldenv[$i]);
342: unless (defined($newenv{$name})) {
343: $newenv{$name}=$value;
344: }
345: }
346: }
347: {
348: my $fh;
349: unless (open($fh,">$ENV{'user.environment'}")) {
350: return 'error';
351: }
352: my $newname;
353: foreach $newname (keys %newenv) {
354: print $fh "$newname=$newenv{$newname}\n";
355: }
356: close($fh);
357: }
358:
359: close($lockfh);
360: return 'ok';
361: }
362: # ----------------------------------------------------- Delete from Environment
363:
364: sub delenv {
365: my $delthis=shift;
366: my %newenv=();
367: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
368: &logthis("<font color=blue>WARNING: ".
369: "Attempt to delete from environment ".$delthis);
370: return 'error';
371: }
372: my @oldenv;
373: {
374: my $fh;
375: unless (open($fh,"$ENV{'user.environment'}")) {
376: return 'error';
377: }
378: unless (flock($fh,LOCK_SH)) {
379: &logthis("<font color=blue>WARNING: ".
380: 'Could not obtain shared lock in delenv: '.$!);
381: close($fh);
382: return 'error: '.$!;
383: }
384: @oldenv=<$fh>;
385: close($fh);
386: }
387: {
388: my $fh;
389: unless (open($fh,">$ENV{'user.environment'}")) {
390: return 'error';
391: }
392: unless (flock($fh,LOCK_EX)) {
393: &logthis("<font color=blue>WARNING: ".
394: 'Could not obtain exclusive lock in delenv: '.$!);
395: close($fh);
396: return 'error: '.$!;
397: }
398: foreach (@oldenv) {
399: if ($_=~/^$delthis/) {
400: my ($key,undef) = split('=',$_);
401: delete($ENV{$key});
402: delete($env{$key});
403: } else {
404: print $fh $_;
405: }
406: }
407: close($fh);
408: }
409: return 'ok';
410: }
411:
412: # ------------------------------------------ Find out current server userload
413: # there is a copy in lond
414: sub userload {
415: my $numusers=0;
416: {
417: opendir(LONIDS,$perlvar{'lonIDsDir'});
418: my $filename;
419: my $curtime=time;
420: while ($filename=readdir(LONIDS)) {
421: if ($filename eq '.' || $filename eq '..') {next;}
422: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
423: if ($curtime-$mtime < 1800) { $numusers++; }
424: }
425: closedir(LONIDS);
426: }
427: my $userloadpercent=0;
428: my $maxuserload=$perlvar{'lonUserLoadLim'};
429: if ($maxuserload) {
430: $userloadpercent=100*$numusers/$maxuserload;
431: }
432: $userloadpercent=sprintf("%.2f",$userloadpercent);
433: return $userloadpercent;
434: }
435:
436: # ------------------------------------------ Fight off request when overloaded
437:
438: sub overloaderror {
439: my ($r,$checkserver)=@_;
440: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
441: my $loadavg;
442: if ($checkserver eq $perlvar{'lonHostID'}) {
443: open(my $loadfile,'/proc/loadavg');
444: $loadavg=<$loadfile>;
445: $loadavg =~ s/\s.*//g;
446: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
447: close($loadfile);
448: } else {
449: $loadavg=&reply('load',$checkserver);
450: }
451: my $overload=$loadavg-100;
452: if ($overload>0) {
453: $r->err_headers_out->{'Retry-After'}=$overload;
454: $r->log_error('Overload of '.$overload.' on '.$checkserver);
455: return 413;
456: }
457: return '';
458: }
459:
460: # ------------------------------ Find server with least workload from spare.tab
461:
462: sub spareserver {
463: my ($loadpercent,$userloadpercent) = @_;
464: my $tryserver;
465: my $spareserver='';
466: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
467: my $lowestserver=$loadpercent > $userloadpercent?
468: $loadpercent : $userloadpercent;
469: foreach $tryserver (keys %spareid) {
470: my $loadans=reply('load',$tryserver);
471: my $userloadans=reply('userload',$tryserver);
472: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
473: next; #didn't get a number from the server
474: }
475: my $answer;
476: if ($loadans =~ /\d/) {
477: if ($userloadans =~ /\d/) {
478: #both are numbers, pick the bigger one
479: $answer=$loadans > $userloadans?
480: $loadans : $userloadans;
481: } else {
482: $answer = $loadans;
483: }
484: } else {
485: $answer = $userloadans;
486: }
487: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
488: $spareserver="http://$hostname{$tryserver}";
489: $lowestserver=$answer;
490: }
491: }
492: return $spareserver;
493: }
494:
495: # --------------------------------------------- Try to change a user's password
496:
497: sub changepass {
498: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
499: $currentpass = &escape($currentpass);
500: $newpass = &escape($newpass);
501: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
502: $server);
503: if (! $answer) {
504: &logthis("No reply on password change request to $server ".
505: "by $uname in domain $udom.");
506: } elsif ($answer =~ "^ok") {
507: &logthis("$uname in $udom successfully changed their password ".
508: "on $server.");
509: } elsif ($answer =~ "^pwchange_failure") {
510: &logthis("$uname in $udom was unable to change their password ".
511: "on $server. The action was blocked by either lcpasswd ".
512: "or pwchange");
513: } elsif ($answer =~ "^non_authorized") {
514: &logthis("$uname in $udom did not get their password correct when ".
515: "attempting to change it on $server.");
516: } elsif ($answer =~ "^auth_mode_error") {
517: &logthis("$uname in $udom attempted to change their password despite ".
518: "not being locally or internally authenticated on $server.");
519: } elsif ($answer =~ "^unknown_user") {
520: &logthis("$uname in $udom attempted to change their password ".
521: "on $server but were unable to because $server is not ".
522: "their home server.");
523: } elsif ($answer =~ "^refused") {
524: &logthis("$server refused to change $uname in $udom password because ".
525: "it was sent an unencrypted request to change the password.");
526: }
527: return $answer;
528: }
529:
530: # ----------------------- Try to determine user's current authentication scheme
531:
532: sub queryauthenticate {
533: my ($uname,$udom)=@_;
534: my $uhome=&homeserver($uname,$udom);
535: if (!$uhome) {
536: &logthis("User $uname at $udom is unknown when looking for authentication mechanism");
537: return 'no_host';
538: }
539: my $answer=reply("encrypt:currentauth:$udom:$uname",$uhome);
540: if ($answer =~ /^(unknown_user|refused|con_lost)/) {
541: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
542: }
543: return $answer;
544: }
545:
546: # --------- Try to authenticate user from domain's lib servers (first this one)
547:
548: sub authenticate {
549: my ($uname,$upass,$udom)=@_;
550: $upass=escape($upass);
551: $uname=~s/\W//g;
552: my $uhome=&homeserver($uname,$udom);
553: if (!$uhome) {
554: &logthis("User $uname at $udom is unknown in authenticate");
555: return 'no_host';
556: }
557: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$uhome);
558: if ($answer eq 'authorized') {
559: &logthis("User $uname at $udom authorized by $uhome");
560: return $uhome;
561: }
562: if ($answer eq 'non_authorized') {
563: &logthis("User $uname at $udom rejected by $uhome");
564: return 'no_host';
565: }
566: &logthis("User $uname at $udom threw error $answer when checking authentication mechanism");
567: return 'no_host';
568: }
569:
570: # ---------------------- Find the homebase for a user from domain's lib servers
571:
572: my %homecache;
573: sub homeserver {
574: my ($uname,$udom,$ignoreBadCache)=@_;
575: my $index="$uname:$udom";
576:
577: if (exists($homecache{$index})) { return $homecache{$index}; }
578: my $tryserver;
579: foreach $tryserver (keys %libserv) {
580: next if ($ignoreBadCache ne 'true' &&
581: exists($badServerCache{$tryserver}));
582: if ($hostdom{$tryserver} eq $udom) {
583: my $answer=reply("home:$udom:$uname",$tryserver);
584: if ($answer eq 'found') {
585: return $homecache{$index}=$tryserver;
586: } elsif ($answer eq 'no_host') {
587: $badServerCache{$tryserver}=1;
588: }
589: }
590: }
591: return 'no_host';
592: }
593:
594: # ------------------------------------- Find the usernames behind a list of IDs
595:
596: sub idget {
597: my ($udom,@ids)=@_;
598: my %returnhash=();
599:
600: my $tryserver;
601: foreach $tryserver (keys %libserv) {
602: if ($hostdom{$tryserver} eq $udom) {
603: my $idlist=join('&',@ids);
604: $idlist=~tr/A-Z/a-z/;
605: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
606: my @answer=();
607: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
608: @answer=split(/\&/,$reply);
609: } ;
610: my $i;
611: for ($i=0;$i<=$#ids;$i++) {
612: if ($answer[$i]) {
613: $returnhash{$ids[$i]}=$answer[$i];
614: }
615: }
616: }
617: }
618: return %returnhash;
619: }
620:
621: # ------------------------------------- Find the IDs behind a list of usernames
622:
623: sub idrget {
624: my ($udom,@unames)=@_;
625: my %returnhash=();
626: foreach (@unames) {
627: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
628: }
629: return %returnhash;
630: }
631:
632: # ------------------------------- Store away a list of names and associated IDs
633:
634: sub idput {
635: my ($udom,%ids)=@_;
636: my %servers=();
637: foreach (keys %ids) {
638: &cput('environment',{'id'=>$ids{$_}},$udom,$_);
639: my $uhom=&homeserver($_,$udom);
640: if ($uhom ne 'no_host') {
641: my $id=&escape($ids{$_});
642: $id=~tr/A-Z/a-z/;
643: my $unam=&escape($_);
644: if ($servers{$uhom}) {
645: $servers{$uhom}.='&'.$id.'='.$unam;
646: } else {
647: $servers{$uhom}=$id.'='.$unam;
648: }
649: }
650: }
651: foreach (keys %servers) {
652: &critical('idput:'.$udom.':'.$servers{$_},$_);
653: }
654: }
655:
656: # --------------------------------------------------- Assign a key to a student
657:
658: sub assign_access_key {
659: #
660: # a valid key looks like uname:udom#comments
661: # comments are being appended
662: #
663: my ($ckey,$kdom,$knum,$cdom,$cnum,$udom,$uname,$logentry)=@_;
664: $kdom=
665: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($kdom));
666: $knum=
667: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($knum));
668: $cdom=
669: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
670: $cnum=
671: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
672: $udom=$ENV{'user.name'} unless (defined($udom));
673: $uname=$ENV{'user.domain'} unless (defined($uname));
674: my %existing=&get('accesskeys',[$ckey],$kdom,$knum);
675: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
676: ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#(.*)$/)) {
677: # assigned to this person
678: # - this should not happen,
679: # unless something went wrong
680: # the first time around
681: # ready to assign
682: $logentry=$1.'; '.$logentry;
683: if (&put('accesskeys',{$ckey=>$uname.':'.$udom.'#'.$logentry},
684: $kdom,$knum) eq 'ok') {
685: # key now belongs to user
686: my $envkey='key.'.$cdom.'_'.$cnum;
687: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
688: &appenv('environment.'.$envkey => $ckey);
689: return 'ok';
690: } else {
691: return
692: 'error: Count not permanently assign key, will need to be re-entered later.';
693: }
694: } else {
695: return 'error: Could not assign key, try again later.';
696: }
697: } elsif (!$existing{$ckey}) {
698: # the key does not exist
699: return 'error: The key does not exist';
700: } else {
701: # the key is somebody else's
702: return 'error: The key is already in use';
703: }
704: }
705:
706: # ------------------------------------------ put an additional comment on a key
707:
708: sub comment_access_key {
709: #
710: # a valid key looks like uname:udom#comments
711: # comments are being appended
712: #
713: my ($ckey,$cdom,$cnum,$logentry)=@_;
714: $cdom=
715: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
716: $cnum=
717: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
718: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
719: if ($existing{$ckey}) {
720: $existing{$ckey}.='; '.$logentry;
721: # ready to assign
722: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
723: $cdom,$cnum) eq 'ok') {
724: return 'ok';
725: } else {
726: return 'error: Count not store comment.';
727: }
728: } else {
729: # the key does not exist
730: return 'error: The key does not exist';
731: }
732: }
733:
734: # ------------------------------------------------------ Generate a set of keys
735:
736: sub generate_access_keys {
737: my ($number,$cdom,$cnum,$logentry)=@_;
738: $cdom=
739: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
740: $cnum=
741: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
742: unless (&allowed('mky',$cdom)) { return 0; }
743: unless (($cdom) && ($cnum)) { return 0; }
744: if ($number>10000) { return 0; }
745: sleep(2); # make sure don't get same seed twice
746: srand(time()^($$+($$<<15))); # from "Programming Perl"
747: my $total=0;
748: for (my $i=1;$i<=$number;$i++) {
749: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
750: sprintf("%lx",int(100000*rand)).'-'.
751: sprintf("%lx",int(100000*rand));
752: $newkey=~s/1/g/g; # folks mix up 1 and l
753: $newkey=~s/0/h/g; # and also 0 and O
754: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
755: if ($existing{$newkey}) {
756: $i--;
757: } else {
758: if (&put('accesskeys',
759: { $newkey => '# generated '.localtime().
760: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
761: '; '.$logentry },
762: $cdom,$cnum) eq 'ok') {
763: $total++;
764: }
765: }
766: }
767: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
768: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
769: return $total;
770: }
771:
772: # ------------------------------------------------------- Validate an accesskey
773:
774: sub validate_access_key {
775: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
776: $cdom=
777: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
778: $cnum=
779: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
780: $udom=$ENV{'user.domain'} unless (defined($udom));
781: $uname=$ENV{'user.name'} unless (defined($uname));
782: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
783: return ($existing{$ckey}=~/^\Q$uname\E\:\Q$udom\E\#/);
784: }
785:
786: # ------------------------------------- Find the section of student in a course
787:
788: sub getsection {
789: my ($udom,$unam,$courseid)=@_;
790: my $cachetime=1800;
791: $courseid=~s/\_/\//g;
792: $courseid=~s/^(\w)/\/$1/;
793:
794: my $hashid="$udom:$unam:$courseid";
795: my ($result,$cached)=&is_cached_new('getsection',$hashid);
796: if (defined($cached)) { return $result; }
797:
798: my %Pending;
799: my %Expired;
800: #
801: # Each role can either have not started yet (pending), be active,
802: # or have expired.
803: #
804: # If there is an active role, we are done.
805: #
806: # If there is more than one role which has not started yet,
807: # choose the one which will start sooner
808: # If there is one role which has not started yet, return it.
809: #
810: # If there is more than one expired role, choose the one which ended last.
811: # If there is a role which has expired, return it.
812: #
813: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
814: &homeserver($unam,$udom)))) {
815: my ($key,$value)=split(/\=/,$_);
816: $key=&unescape($key);
817: next if ($key !~/^\Q$courseid\E(?:\/)*(\w+)*\_st$/);
818: my $section=$1;
819: if ($key eq $courseid.'_st') { $section=''; }
820: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
821: my $now=time;
822: if (defined($end) && $end && ($now > $end)) {
823: $Expired{$end}=$section;
824: next;
825: }
826: if (defined($start) && $start && ($now < $start)) {
827: $Pending{$start}=$section;
828: next;
829: }
830: return &do_cache_new('getsection',$hashid,$section,$cachetime);
831: }
832: #
833: # Presumedly there will be few matching roles from the above
834: # loop and the sorting time will be negligible.
835: if (scalar(keys(%Pending))) {
836: my ($time) = sort {$a <=> $b} keys(%Pending);
837: return &do_cache_new('getsection',$hashid,$Pending{$time},$cachetime);
838: }
839: if (scalar(keys(%Expired))) {
840: my @sorted = sort {$a <=> $b} keys(%Expired);
841: my $time = pop(@sorted);
842: return &do_cache_new('getsection',$hashid,$Expired{$time},$cachetime);
843: }
844: return &do_cache_new('getsection',$hashid,'-1',$cachetime);
845: }
846:
847: sub save_cache {
848: &purge_remembered();
849: }
850:
851: my $to_remember=-1;
852: my %remembered;
853: my %accessed;
854: my $kicks=0;
855: my $hits=0;
856: sub devalidate_cache_new {
857: my ($name,$id,$debug) = @_;
858: if ($debug) { &Apache::lonnet::logthis("deleting $name:$id"); }
859: $id=&escape($name.':'.$id);
860: $memcache->delete($id);
861: delete($remembered{$id});
862: delete($accessed{$id});
863: }
864:
865: sub is_cached_new {
866: my ($name,$id,$debug) = @_;
867: $id=&escape($name.':'.$id);
868: if (exists($remembered{$id})) {
869: if ($debug) { &Apache::lonnet::logthis("Earyl return $id of $remembered{$id} "); }
870: $accessed{$id}=[&gettimeofday()];
871: $hits++;
872: return ($remembered{$id},1);
873: }
874: my $value = $memcache->get($id);
875: if (!(defined($value))) {
876: if ($debug) { &Apache::lonnet::logthis("getting $id is not defined"); }
877: return (undef,undef);
878: }
879: if ($value eq '__undef__') {
880: if ($debug) { &Apache::lonnet::logthis("getting $id is __undef__"); }
881: $value=undef;
882: }
883: &make_room($id,$value,$debug);
884: if ($debug) { &Apache::lonnet::logthis("getting $id is $value"); }
885: return ($value,1);
886: }
887:
888: sub do_cache_new {
889: my ($name,$id,$value,$time,$debug) = @_;
890: $id=&escape($name.':'.$id);
891: my $setvalue=$value;
892: if (!defined($setvalue)) {
893: $setvalue='__undef__';
894: }
895: if ($debug) { &Apache::lonnet::logthis("Setting $id to $value"); }
896: $memcache->set($id,$setvalue,$time);
897: # need to make a copy of $value
898: #&make_room($id,$value,$debug);
899: return $value;
900: }
901:
902: sub make_room {
903: my ($id,$value,$debug)=@_;
904: $remembered{$id}=$value;
905: if ($to_remember<0) { return; }
906: $accessed{$id}=[&gettimeofday()];
907: if (scalar(keys(%remembered)) <= $to_remember) { return; }
908: my $to_kick;
909: my $max_time=0;
910: foreach my $other (keys(%accessed)) {
911: if (&tv_interval($accessed{$other}) > $max_time) {
912: $to_kick=$other;
913: $max_time=&tv_interval($accessed{$other});
914: }
915: }
916: delete($remembered{$to_kick});
917: delete($accessed{$to_kick});
918: $kicks++;
919: if ($debug) { &logthis("kicking $to_kick $max_time $kicks\n"); }
920: return;
921: }
922:
923: sub purge_remembered {
924: #&logthis("Tossing ".scalar(keys(%remembered)));
925: #&logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
926: undef(%remembered);
927: undef(%accessed);
928: }
929: # ------------------------------------- Read an entry from a user's environment
930:
931: sub userenvironment {
932: my ($udom,$unam,@what)=@_;
933: my %returnhash=();
934: my @answer=split(/\&/,
935: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
936: &homeserver($unam,$udom)));
937: my $i;
938: for ($i=0;$i<=$#what;$i++) {
939: $returnhash{$what[$i]}=&unescape($answer[$i]);
940: }
941: return %returnhash;
942: }
943:
944: # ---------------------------------------------------------- Get a studentphoto
945: sub studentphoto {
946: my ($udom,$unam,$ext) = @_;
947: my $home=&Apache::lonnet::homeserver($unam,$udom);
948: my $ret=&Apache::lonnet::reply("studentphoto:$udom:$unam:$ext",$home);
949: my $url="/uploaded/$udom/$unam/internal/studentphoto.".$ext;
950: if ($ret ne 'ok') {
951: return '/adm/lonKaputt/lonlogo_broken.gif';
952: }
953: my $tokenurl=&Apache::lonnet::tokenwrapper($url);
954: return $tokenurl;
955: }
956:
957: # -------------------------------------------------------------------- New chat
958:
959: sub chatsend {
960: my ($newentry,$anon)=@_;
961: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
962: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
963: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
964: &reply('chatsend:'.$cdom.':'.$cnum.':'.
965: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
966: &escape($newentry)),$chome);
967: }
968:
969: # ------------------------------------------ Find current version of a resource
970:
971: sub getversion {
972: my $fname=&clutter(shift);
973: unless ($fname=~/^\/res\//) { return -1; }
974: return ¤tversion(&filelocation('',$fname));
975: }
976:
977: sub currentversion {
978: my $fname=shift;
979: my ($result,$cached)=&is_cached_new('resversion',$fname);
980: if (defined($cached)) { return $result; }
981: my $author=$fname;
982: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
983: my ($udom,$uname)=split(/\//,$author);
984: my $home=homeserver($uname,$udom);
985: if ($home eq 'no_host') {
986: return -1;
987: }
988: my $answer=reply("currentversion:$fname",$home);
989: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
990: return -1;
991: }
992: return &do_cache_new('resversion',$fname,$answer,600);
993: }
994:
995: # ----------------------------- Subscribe to a resource, return URL if possible
996:
997: sub subscribe {
998: my $fname=shift;
999: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1000: $fname=~s/[\n\r]//g;
1001: my $author=$fname;
1002: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1003: my ($udom,$uname)=split(/\//,$author);
1004: my $home=homeserver($uname,$udom);
1005: if ($home eq 'no_host') {
1006: return 'not_found';
1007: }
1008: my $answer=reply("sub:$fname",$home);
1009: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1010: $answer.=' by '.$home;
1011: }
1012: return $answer;
1013: }
1014:
1015: # -------------------------------------------------------------- Replicate file
1016:
1017: sub repcopy {
1018: my $filename=shift;
1019: $filename=~s/\/+/\//g;
1020: if ($filename=~m|^/home/httpd/html/adm/|) { return 'ok'; }
1021: if ($filename=~m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
1022: if ($filename=~m|^/home/httpd/html/userfiles/| or
1023: $filename=~m -^/*(uploaded|editupload)/-) {
1024: return &repcopy_userfile($filename);
1025: }
1026: $filename=~s/[\n\r]//g;
1027: my $transname="$filename.in.transfer";
1028: if ((-e $filename) || (-e $transname)) { return 'ok'; }
1029: my $remoteurl=subscribe($filename);
1030: if ($remoteurl =~ /^con_lost by/) {
1031: &logthis("Subscribe returned $remoteurl: $filename");
1032: return 'unavailable';
1033: } elsif ($remoteurl eq 'not_found') {
1034: #&logthis("Subscribe returned not_found: $filename");
1035: return 'not_found';
1036: } elsif ($remoteurl =~ /^rejected by/) {
1037: &logthis("Subscribe returned $remoteurl: $filename");
1038: return 'forbidden';
1039: } elsif ($remoteurl eq 'directory') {
1040: return 'ok';
1041: } else {
1042: my $author=$filename;
1043: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1044: my ($udom,$uname)=split(/\//,$author);
1045: my $home=homeserver($uname,$udom);
1046: unless ($home eq $perlvar{'lonHostID'}) {
1047: my @parts=split(/\//,$filename);
1048: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1049: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1050: &logthis("Malconfiguration for replication: $filename");
1051: return 'bad_request';
1052: }
1053: my $count;
1054: for ($count=5;$count<$#parts;$count++) {
1055: $path.="/$parts[$count]";
1056: if ((-e $path)!=1) {
1057: mkdir($path,0777);
1058: }
1059: }
1060: my $ua=new LWP::UserAgent;
1061: my $request=new HTTP::Request('GET',"$remoteurl");
1062: my $response=$ua->request($request,$transname);
1063: if ($response->is_error()) {
1064: unlink($transname);
1065: my $message=$response->status_line;
1066: &logthis("<font color=blue>WARNING:"
1067: ." LWP get: $message: $filename</font>");
1068: return 'unavailable';
1069: } else {
1070: if ($remoteurl!~/\.meta$/) {
1071: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1072: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1073: if ($mresponse->is_error()) {
1074: unlink($filename.'.meta');
1075: &logthis(
1076: "<font color=yellow>INFO: No metadata: $filename</font>");
1077: }
1078: }
1079: rename($transname,$filename);
1080: return 'ok';
1081: }
1082: }
1083: }
1084: }
1085:
1086: # ------------------------------------------------ Get server side include body
1087: sub ssi_body {
1088: my ($filelink,%form)=@_;
1089: if (! exists($form{'LONCAPA_INTERNAL_no_discussion'})) {
1090: $form{'LONCAPA_INTERNAL_no_discussion'}='true';
1091: }
1092: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1093: &ssi($filelink,%form));
1094: $output=~s|//(\s*<!--)? BEGIN LON-CAPA Internal.+// END LON-CAPA Internal\s*(-->)?\s||gs;
1095: $output=~s/^.*?\<body[^\>]*\>//si;
1096: $output=~s/(.*)\<\/body\s*\>.*?$/$1/si;
1097: return $output;
1098: }
1099:
1100: # --------------------------------------------------------- Server Side Include
1101:
1102: sub ssi {
1103:
1104: my ($fn,%form)=@_;
1105:
1106: my $ua=new LWP::UserAgent;
1107:
1108: my $request;
1109:
1110: if (%form) {
1111: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1112: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1113: } else {
1114: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1115: }
1116:
1117: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1118: my $response=$ua->request($request);
1119:
1120: return $response->content;
1121: }
1122:
1123: sub externalssi {
1124: my ($url)=@_;
1125: my $ua=new LWP::UserAgent;
1126: my $request=new HTTP::Request('GET',$url);
1127: my $response=$ua->request($request);
1128: return $response->content;
1129: }
1130:
1131: # -------------------------------- Allow a /uploaded/ URI to be vouched for
1132:
1133: sub allowuploaded {
1134: my ($srcurl,$url)=@_;
1135: $url=&clutter(&declutter($url));
1136: my $dir=$url;
1137: $dir=~s/\/[^\/]+$//;
1138: my %httpref=();
1139: my $httpurl=&hreflocation('',$url);
1140: $httpref{'httpref.'.$httpurl}=$srcurl;
1141: &Apache::lonnet::appenv(%httpref);
1142: }
1143:
1144: # --------- File operations in /home/httpd/html/userfiles/$domain/1/2/3/$course
1145: # input: action, courseID, current domain, home server for course, intended
1146: # path to file, source of file.
1147: # output: url to file (if action was uploaddoc),
1148: # ok if successful, or diagnostic message otherwise (if action was propagate or copy)
1149: #
1150: # Allows directory structure to be used within lonUsers/../userfiles/ for a
1151: # course.
1152: #
1153: # action = propagate - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1154: # will be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles in
1155: # course's home server.
1156: #
1157: # action = copy - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file will
1158: # be copied from $source (current location) to
1159: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1160: # and will then be copied to
1161: # /home/httpd/lonUsers/$domain/1/2/3/$course/userfiles/$file in
1162: # course's home server.
1163: #
1164: # action = uploaddoc - /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1165: # will be retrived from $ENV{form.uploaddoc} (from DOCS interface) to
1166: # /home/httpd/html/userfiles/$domain/1/2/3/$course/$file
1167: # and will then be copied to /home/httpd/lonUsers/1/2/3/$course/userfiles/$file
1168: # in course's home server.
1169:
1170:
1171: sub process_coursefile {
1172: my ($action,$docuname,$docudom,$docuhome,$file,$source)=@_;
1173: my $fetchresult;
1174: if ($action eq 'propagate') {
1175: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file
1176: ,$docuhome);
1177: } else {
1178: my $fetchresult = '';
1179: my $fpath = '';
1180: my $fname = $file;
1181: ($fpath,$fname) = ($file =~ m|^(.*)/([^/]+)$|);
1182: $fpath=$docudom.'/'.$docuname.'/'.$fpath;
1183: my $filepath=$perlvar{'lonDocRoot'}.'/userfiles';
1184: unless ($fpath eq '') {
1185: my @parts=split('/',$fpath);
1186: foreach my $part (@parts) {
1187: $filepath.= '/'.$part;
1188: if ((-e $filepath)!=1) {
1189: mkdir($filepath,0777);
1190: }
1191: }
1192: }
1193: if ($action eq 'copy') {
1194: if ($source eq '') {
1195: $fetchresult = 'no source file';
1196: return $fetchresult;
1197: } else {
1198: my $destination = $filepath.'/'.$fname;
1199: rename($source,$destination);
1200: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1201: $docuhome);
1202: }
1203: } elsif ($action eq 'uploaddoc') {
1204: open(my $fh,'>'.$filepath.'/'.$fname);
1205: print $fh $ENV{'form.'.$source};
1206: close($fh);
1207: $fetchresult= &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$file,
1208: $docuhome);
1209: if ($fetchresult eq 'ok') {
1210: return '/uploaded/'.$fpath.'/'.$fname;
1211: } else {
1212: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1213: ' to host '.$docuhome.': '.$fetchresult);
1214: return '/adm/notfound.html';
1215: }
1216: }
1217: }
1218: unless ( $fetchresult eq 'ok') {
1219: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$file.
1220: ' to host '.$docuhome.': '.$fetchresult);
1221: }
1222: return $fetchresult;
1223: }
1224:
1225: sub clean_filename {
1226: my ($fname)=@_;
1227: # Replace Windows backslashes by forward slashes
1228: $fname=~s/\\/\//g;
1229: # Get rid of everything but the actual filename
1230: $fname=~s/^.*\/([^\/]+)$/$1/;
1231: # Replace spaces by underscores
1232: $fname=~s/\s+/\_/g;
1233: # Replace all other weird characters by nothing
1234: $fname=~s/[^\w\.\-]//g;
1235: # Replace all .\d. sequences with _\d. so they no longer look like version
1236: # numbers
1237: $fname=~s/\.(\d+)(?=\.)/_$1/g;
1238: return $fname;
1239: }
1240:
1241: # --------------- Take an uploaded file and put it into the userfiles directory
1242: # input: name of form element, coursedoc=1 means this is for the course
1243: # output: url of file in userspace
1244:
1245:
1246: sub userfileupload {
1247: my ($formname,$coursedoc,$subdir)=@_;
1248: if (!defined($subdir)) { $subdir='unknown'; }
1249: my $fname=$ENV{'form.'.$formname.'.filename'};
1250: $fname=&clean_filename($fname);
1251: # See if there is anything left
1252: unless ($fname) { return 'error: no uploaded file'; }
1253: chop($ENV{'form.'.$formname});
1254: if (($formname eq 'screenshot') && ($subdir eq 'helprequests')) { #files uploaded to help request form are handled differently
1255: my $now = time;
1256: my $filepath = 'tmp/helprequests/'.$now;
1257: my @parts=split(/\//,$filepath);
1258: my $fullpath = $perlvar{'lonDaemons'};
1259: for (my $i=0;$i<@parts;$i++) {
1260: $fullpath .= '/'.$parts[$i];
1261: if ((-e $fullpath)!=1) {
1262: mkdir($fullpath,0777);
1263: }
1264: }
1265: open(my $fh,'>'.$fullpath.'/'.$fname);
1266: print $fh $ENV{'form.'.$formname};
1267: close($fh);
1268: return $fullpath.'/'.$fname;
1269: }
1270: # Create the directory if not present
1271: my $docuname='';
1272: my $docudom='';
1273: my $docuhome='';
1274: $fname="$subdir/$fname";
1275: if ($coursedoc) {
1276: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1277: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1278: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1279: if ($ENV{'form.folder'} =~ m/^default/) {
1280: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1281: } else {
1282: $fname=$ENV{'form.folder'}.'/'.$fname;
1283: return &process_coursefile('uploaddoc',$docuname,$docudom,$docuhome,$fname,$formname);
1284: }
1285: } else {
1286: $docuname=$ENV{'user.name'};
1287: $docudom=$ENV{'user.domain'};
1288: $docuhome=$ENV{'user.home'};
1289: return &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1290: }
1291: }
1292:
1293: sub finishuserfileupload {
1294: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1295: my $path=$docudom.'/'.$docuname.'/';
1296: my $filepath=$perlvar{'lonDocRoot'};
1297: my ($fnamepath,$file);
1298: $file=$fname;
1299: if ($fname=~m|/|) {
1300: ($fnamepath,$file) = ($fname =~ m|^(.*)/([^/]+)$|);
1301: $path.=$fnamepath.'/';
1302: }
1303: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1304: my $count;
1305: for ($count=4;$count<=$#parts;$count++) {
1306: $filepath.="/$parts[$count]";
1307: if ((-e $filepath)!=1) {
1308: mkdir($filepath,0777);
1309: }
1310: }
1311: # Save the file
1312: {
1313: open(FH,'>'.$filepath.'/'.$file);
1314: print FH $ENV{'form.'.$formname};
1315: close(FH);
1316: }
1317: # Notify homeserver to grep it
1318: #
1319: my $fetchresult= &reply('fetchuserfile:'.$path.$file,$docuhome);
1320: if ($fetchresult eq 'ok') {
1321: #
1322: # Return the URL to it
1323: return '/uploaded/'.$path.$file;
1324: } else {
1325: &logthis('Failed to transfer '.$path.$file.' to host '.$docuhome.
1326: ': '.$fetchresult);
1327: return '/adm/notfound.html';
1328: }
1329: }
1330:
1331: sub removeuploadedurl {
1332: my ($url)=@_;
1333: my (undef,undef,$udom,$uname,$fname)=split('/',$url,5);
1334: return &removeuserfile($uname,$udom,$fname);
1335: }
1336:
1337: sub removeuserfile {
1338: my ($docuname,$docudom,$fname)=@_;
1339: my $home=&homeserver($docuname,$docudom);
1340: return &reply("removeuserfile:$docudom/$docuname/$fname",$home);
1341: }
1342:
1343: sub mkdiruserfile {
1344: my ($docuname,$docudom,$dir)=@_;
1345: my $home=&homeserver($docuname,$docudom);
1346: return &reply("mkdiruserfile:".&escape("$docudom/$docuname/$dir"),$home);
1347: }
1348:
1349: sub renameuserfile {
1350: my ($docuname,$docudom,$old,$new)=@_;
1351: my $home=&homeserver($docuname,$docudom);
1352: return &reply("renameuserfile:$docudom:$docuname:".&escape("$old").':'.
1353: &escape("$new"),$home);
1354: }
1355:
1356: # ------------------------------------------------------------------------- Log
1357:
1358: sub log {
1359: my ($dom,$nam,$hom,$what)=@_;
1360: return critical("log:$dom:$nam:$what",$hom);
1361: }
1362:
1363: # ------------------------------------------------------------------ Course Log
1364: #
1365: # This routine flushes several buffers of non-mission-critical nature
1366: #
1367:
1368: sub flushcourselogs {
1369: &logthis('Flushing log buffers');
1370: #
1371: # course logs
1372: # This is a log of all transactions in a course, which can be used
1373: # for data mining purposes
1374: #
1375: # It also collects the courseid database, which lists last transaction
1376: # times and course titles for all courseids
1377: #
1378: my %courseidbuffer=();
1379: foreach (keys %courselogs) {
1380: my $crsid=$_;
1381: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1382: &escape($courselogs{$crsid}),
1383: $coursehombuf{$crsid}) eq 'ok') {
1384: delete $courselogs{$crsid};
1385: } else {
1386: &logthis('Failed to flush log buffer for '.$crsid);
1387: if (length($courselogs{$crsid})>40000) {
1388: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1389: " exceeded maximum size, deleting.</font>");
1390: delete $courselogs{$crsid};
1391: }
1392: }
1393: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1394: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1395: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1396: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1397: } else {
1398: $courseidbuffer{$coursehombuf{$crsid}}=
1399: &escape($crsid).'='.&escape($coursedescrbuf{$crsid}).
1400: ':'.&escape($courseinstcodebuf{$crsid}).':'.&escape($courseownerbuf{$crsid});
1401: }
1402: }
1403: #
1404: # Write course id database (reverse lookup) to homeserver of courses
1405: # Is used in pickcourse
1406: #
1407: foreach (keys %courseidbuffer) {
1408: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1409: }
1410: #
1411: # File accesses
1412: # Writes to the dynamic metadata of resources to get hit counts, etc.
1413: #
1414: foreach my $entry (keys(%accesshash)) {
1415: if ($entry =~ /___count$/) {
1416: my ($dom,$name);
1417: ($dom,$name,undef)=($entry=~m:___(\w+)/(\w+)/(.*)___count$:);
1418: if (! defined($dom) || $dom eq '' ||
1419: ! defined($name) || $name eq '') {
1420: my $cid = $ENV{'request.course.id'};
1421: $dom = $ENV{'request.'.$cid.'.domain'};
1422: $name = $ENV{'request.'.$cid.'.num'};
1423: }
1424: my $value = $accesshash{$entry};
1425: my (undef,$url,undef) = ($entry =~ /^(.*)___(.*)___count$/);
1426: my %temphash=($url => $value);
1427: my $result = &inc('nohist_accesscount',\%temphash,$dom,$name);
1428: if ($result eq 'ok') {
1429: delete $accesshash{$entry};
1430: } elsif ($result eq 'unknown_cmd') {
1431: # Target server has old code running on it.
1432: my %temphash=($entry => $value);
1433: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1434: delete $accesshash{$entry};
1435: }
1436: }
1437: } else {
1438: my ($dom,$name) = ($entry=~m:___(\w+)/(\w+)/(.*)___(\w+)$:);
1439: my %temphash=($entry => $accesshash{$entry});
1440: if (&put('nohist_resevaldata',\%temphash,$dom,$name) eq 'ok') {
1441: delete $accesshash{$entry};
1442: }
1443: }
1444: }
1445: #
1446: # Roles
1447: # Reverse lookup of user roles for course faculty/staff and co-authorship
1448: #
1449: foreach (keys %userrolehash) {
1450: my $entry=$_;
1451: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1452: split(/\:/,$entry);
1453: if (&Apache::lonnet::put('nohist_userroles',
1454: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1455: $rudom,$runame) eq 'ok') {
1456: delete $userrolehash{$entry};
1457: }
1458: }
1459: $dumpcount++;
1460: }
1461:
1462: sub courselog {
1463: my $what=shift;
1464: $what=time.':'.$what;
1465: unless ($ENV{'request.course.id'}) { return ''; }
1466: $coursedombuf{$ENV{'request.course.id'}}=
1467: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1468: $coursenumbuf{$ENV{'request.course.id'}}=
1469: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1470: $coursehombuf{$ENV{'request.course.id'}}=
1471: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1472: $coursedescrbuf{$ENV{'request.course.id'}}=
1473: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1474: $courseinstcodebuf{$ENV{'request.course.id'}}=
1475: $ENV{'course.'.$ENV{'request.course.id'}.'.internal.coursecode'};
1476: $courseownerbuf{$ENV{'request.course.id'}}=
1477: $ENV{'course.'.$ENV{'request.course.id'}.'.internal.courseowner'};
1478: if (defined $courselogs{$ENV{'request.course.id'}}) {
1479: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1480: } else {
1481: $courselogs{$ENV{'request.course.id'}}.=$what;
1482: }
1483: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1484: &flushcourselogs();
1485: }
1486: }
1487:
1488: sub courseacclog {
1489: my $fnsymb=shift;
1490: unless ($ENV{'request.course.id'}) { return ''; }
1491: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1492: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1493: $what.=':POST';
1494: # FIXME: Probably ought to escape things....
1495: foreach (keys %ENV) {
1496: if ($_=~/^form\.(.*)/) {
1497: $what.=':'.$1.'='.$ENV{$_};
1498: }
1499: }
1500: } elsif ($fnsymb =~ m:^/adm/searchcat:) {
1501: # FIXME: We should not be depending on a form parameter that someone
1502: # editing lonsearchcat.pm might change in the future.
1503: if ($ENV{'form.phase'} eq 'course_search') {
1504: $what.= ':POST';
1505: # FIXME: Probably ought to escape things....
1506: foreach my $element ('courseexp','crsfulltext','crsrelated',
1507: 'crsdiscuss') {
1508: $what.=':'.$element.'='.$ENV{'form.'.$element};
1509: }
1510: }
1511: }
1512: &courselog($what);
1513: }
1514:
1515: sub countacc {
1516: my $url=&declutter(shift);
1517: return if (! defined($url) || $url eq '');
1518: unless ($ENV{'request.course.id'}) { return ''; }
1519: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1520: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1521: $accesshash{$key}++;
1522: }
1523:
1524: sub linklog {
1525: my ($from,$to)=@_;
1526: $from=&declutter($from);
1527: $to=&declutter($to);
1528: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1529: $accesshash{$to.'___'.$from.'___goto'}=1;
1530: }
1531:
1532: sub userrolelog {
1533: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1534: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1535: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1536: ($trole=~/^cr/) || ($trole=~/^ta/)) {
1537: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1538: $userrolehash
1539: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1540: =$tend.':'.$tstart;
1541: }
1542: }
1543:
1544: sub get_course_adv_roles {
1545: my $cid=shift;
1546: $cid=$ENV{'request.course.id'} unless (defined($cid));
1547: my %coursehash=&coursedescription($cid);
1548: my %nothide=();
1549: foreach (split(/\s*\,\s*/,$coursehash{'nothideprivileged'})) {
1550: $nothide{join(':',split(/[\@\:]/,$_))}=1;
1551: }
1552: my %returnhash=();
1553: my %dumphash=
1554: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1555: my $now=time;
1556: foreach (keys %dumphash) {
1557: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1558: if (($tstart) && ($tstart<0)) { next; }
1559: if (($tend) && ($tend<$now)) { next; }
1560: if (($tstart) && ($now<$tstart)) { next; }
1561: my ($role,$username,$domain,$section)=split(/\:/,$_);
1562: if ($username eq '' || $domain eq '') { next; }
1563: if ((&privileged($username,$domain)) &&
1564: (!$nothide{$username.':'.$domain})) { next; }
1565: my $key=&plaintext($role);
1566: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1567: if ($returnhash{$key}) {
1568: $returnhash{$key}.=','.$username.':'.$domain;
1569: } else {
1570: $returnhash{$key}=$username.':'.$domain;
1571: }
1572: }
1573: return %returnhash;
1574: }
1575:
1576: sub get_my_roles {
1577: my ($uname,$udom)=@_;
1578: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1579: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1580: my %dumphash=
1581: &dump('nohist_userroles',$udom,$uname);
1582: my %returnhash=();
1583: my $now=time;
1584: foreach (keys %dumphash) {
1585: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1586: if (($tstart) && ($tstart<0)) { next; }
1587: if (($tend) && ($tend<$now)) { next; }
1588: if (($tstart) && ($now<$tstart)) { next; }
1589: my ($role,$username,$domain,$section)=split(/\:/,$_);
1590: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1591: }
1592: return %returnhash;
1593: }
1594:
1595: # ----------------------------------------------------- Frontpage Announcements
1596: #
1597: #
1598:
1599: sub postannounce {
1600: my ($server,$text)=@_;
1601: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1602: unless ($text=~/\w/) { $text=''; }
1603: return &reply('setannounce:'.&escape($text),$server);
1604: }
1605:
1606: sub getannounce {
1607:
1608: if (open(my $fh,$perlvar{'lonDocRoot'}.'/announcement.txt')) {
1609: my $announcement='';
1610: while (<$fh>) { $announcement .=$_; }
1611: close($fh);
1612: if ($announcement=~/\w/) {
1613: return
1614: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1615: '<tr><td bgcolor="#FFFFFF"><tt>'.$announcement.'</tt></td></tr></table>';
1616: } else {
1617: return '';
1618: }
1619: } else {
1620: return '';
1621: }
1622: }
1623:
1624: # ---------------------------------------------------------- Course ID routines
1625: # Deal with domain's nohist_courseid.db files
1626: #
1627:
1628: sub courseidput {
1629: my ($domain,$what,$coursehome)=@_;
1630: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1631: }
1632:
1633: sub courseiddump {
1634: my ($domfilter,$descfilter,$sincefilter,$instcodefilter,$ownerfilter,$hostidflag,$hostidref)=@_;
1635: my %returnhash=();
1636: unless ($domfilter) { $domfilter=''; }
1637: foreach my $tryserver (keys %libserv) {
1638: if ( ($hostidflag == 1 && grep/^$tryserver$/,@{$hostidref}) || (!defined($hostidflag)) ) {
1639: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1640: foreach (
1641: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1642: $sincefilter.':'.&escape($descfilter).':'.
1643: &escape($instcodefilter).':'.&escape($ownerfilter),
1644: $tryserver))) {
1645: my ($key,$value)=split(/\=/,$_);
1646: if (($key) && ($value)) {
1647: $returnhash{&unescape($key)}=$value;
1648: }
1649: }
1650: }
1651: }
1652: }
1653: return %returnhash;
1654: }
1655:
1656: #
1657: # ----------------------------------------------------------- Check out an item
1658:
1659: sub get_first_access {
1660: my ($type,$argsymb)=@_;
1661: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1662: if ($argsymb) { $symb=$argsymb; }
1663: my ($map,$id,$res)=&decode_symb($symb);
1664: if ($type eq 'map') {
1665: $res=&symbread($map);
1666: } else {
1667: $res=$symb;
1668: }
1669: my %times=&get('firstaccesstimes',["$courseid\0$res"],$udom,$uname);
1670: return $times{"$courseid\0$res"};
1671: }
1672:
1673: sub set_first_access {
1674: my ($type)=@_;
1675: my ($symb,$courseid,$udom,$uname)=&Apache::lonxml::whichuser();
1676: my ($map,$id,$res)=&decode_symb($symb);
1677: if ($type eq 'map') {
1678: $res=&symbread($map);
1679: } else {
1680: $res=$symb;
1681: }
1682: my $firstaccess=&get_first_access($type,$symb);
1683: if (!$firstaccess) {
1684: return &put('firstaccesstimes',{"$courseid\0$res"=>time},$udom,$uname);
1685: }
1686: return 'already_set';
1687: }
1688:
1689: sub checkout {
1690: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1691: my $now=time;
1692: my $lonhost=$perlvar{'lonHostID'};
1693: my $infostr=&escape(
1694: 'CHECKOUTTOKEN&'.
1695: $tuname.'&'.
1696: $tudom.'&'.
1697: $tcrsid.'&'.
1698: $symb.'&'.
1699: $now.'&'.$ENV{'REMOTE_ADDR'});
1700: my $token=&reply('tmpput:'.$infostr,$lonhost);
1701: if ($token=~/^error\:/) {
1702: &logthis("<font color=blue>WARNING: ".
1703: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1704: "</font>");
1705: return '';
1706: }
1707:
1708: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1709: $token=~tr/a-z/A-Z/;
1710:
1711: my %infohash=('resource.0.outtoken' => $token,
1712: 'resource.0.checkouttime' => $now,
1713: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1714:
1715: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1716: return '';
1717: } else {
1718: &logthis("<font color=blue>WARNING: ".
1719: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1720: "</font>");
1721: }
1722:
1723: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1724: &escape('Checkout '.$infostr.' - '.
1725: $token)) ne 'ok') {
1726: return '';
1727: } else {
1728: &logthis("<font color=blue>WARNING: ".
1729: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1730: "</font>");
1731: }
1732: return $token;
1733: }
1734:
1735: # ------------------------------------------------------------ Check in an item
1736:
1737: sub checkin {
1738: my $token=shift;
1739: my $now=time;
1740: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1741: $lonhost=~tr/A-Z/a-z/;
1742: my $dtoken=$ta.'_'.$hostname{$lonhost}.'_'.$tb;
1743: $dtoken=~s/\W/\_/g;
1744: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1745: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1746:
1747: unless (($tuname) && ($tudom)) {
1748: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1749: return '';
1750: }
1751:
1752: unless (&allowed('mgr',$tcrsid)) {
1753: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1754: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1755: return '';
1756: }
1757:
1758: my %infohash=('resource.0.intoken' => $token,
1759: 'resource.0.checkintime' => $now,
1760: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1761:
1762: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1763: return '';
1764: }
1765:
1766: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1767: &escape('Checkin - '.$token)) ne 'ok') {
1768: return '';
1769: }
1770:
1771: return ($symb,$tuname,$tudom,$tcrsid);
1772: }
1773:
1774: # --------------------------------------------- Set Expire Date for Spreadsheet
1775:
1776: sub expirespread {
1777: my ($uname,$udom,$stype,$usymb)=@_;
1778: my $cid=$ENV{'request.course.id'};
1779: if ($cid) {
1780: my $now=time;
1781: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1782: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1783: $ENV{'course.'.$cid.'.num'}.
1784: ':nohist_expirationdates:'.
1785: &escape($key).'='.$now,
1786: $ENV{'course.'.$cid.'.home'})
1787: }
1788: return 'ok';
1789: }
1790:
1791: # ----------------------------------------------------- Devalidate Spreadsheets
1792:
1793: sub devalidate {
1794: my ($symb,$uname,$udom)=@_;
1795: my $cid=$ENV{'request.course.id'};
1796: if ($cid) {
1797: # delete the stored spreadsheets for
1798: # - the student level sheet of this user in course's homespace
1799: # - the assessment level sheet for this resource
1800: # for this user in user's homespace
1801: # - current conditional state info
1802: my $key=$uname.':'.$udom.':';
1803: my $status=
1804: &del('nohist_calculatedsheets',
1805: [$key.'studentcalc:'],
1806: $ENV{'course.'.$cid.'.domain'},
1807: $ENV{'course.'.$cid.'.num'})
1808: .' '.
1809: &del('nohist_calculatedsheets_'.$cid,
1810: [$key.'assesscalc:'.$symb],$udom,$uname);
1811: unless ($status eq 'ok ok') {
1812: &logthis('Could not devalidate spreadsheet '.
1813: $uname.' at '.$udom.' for '.
1814: $symb.': '.$status);
1815: }
1816: &delenv('user.state.'.$cid);
1817: }
1818: }
1819:
1820: sub get_scalar {
1821: my ($string,$end) = @_;
1822: my $value;
1823: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1824: $value = $1;
1825: } elsif ($$string =~ s/^([^&]*?)&//) {
1826: $value = $1;
1827: }
1828: return &unescape($value);
1829: }
1830:
1831: sub array2str {
1832: my (@array) = @_;
1833: my $result=&arrayref2str(\@array);
1834: $result=~s/^__ARRAY_REF__//;
1835: $result=~s/__END_ARRAY_REF__$//;
1836: return $result;
1837: }
1838:
1839: sub arrayref2str {
1840: my ($arrayref) = @_;
1841: my $result='__ARRAY_REF__';
1842: foreach my $elem (@$arrayref) {
1843: if(ref($elem) eq 'ARRAY') {
1844: $result.=&arrayref2str($elem).'&';
1845: } elsif(ref($elem) eq 'HASH') {
1846: $result.=&hashref2str($elem).'&';
1847: } elsif(ref($elem)) {
1848: #print("Got a ref of ".(ref($elem))." skipping.");
1849: } else {
1850: $result.=&escape($elem).'&';
1851: }
1852: }
1853: $result=~s/\&$//;
1854: $result .= '__END_ARRAY_REF__';
1855: return $result;
1856: }
1857:
1858: sub hash2str {
1859: my (%hash) = @_;
1860: my $result=&hashref2str(\%hash);
1861: $result=~s/^__HASH_REF__//;
1862: $result=~s/__END_HASH_REF__$//;
1863: return $result;
1864: }
1865:
1866: sub hashref2str {
1867: my ($hashref)=@_;
1868: my $result='__HASH_REF__';
1869: foreach (sort(keys(%$hashref))) {
1870: if (ref($_) eq 'ARRAY') {
1871: $result.=&arrayref2str($_).'=';
1872: } elsif (ref($_) eq 'HASH') {
1873: $result.=&hashref2str($_).'=';
1874: } elsif (ref($_)) {
1875: $result.='=';
1876: #print("Got a ref of ".(ref($_))." skipping.");
1877: } else {
1878: if ($_) {$result.=&escape($_).'=';} else { last; }
1879: }
1880:
1881: if(ref($hashref->{$_}) eq 'ARRAY') {
1882: $result.=&arrayref2str($hashref->{$_}).'&';
1883: } elsif(ref($hashref->{$_}) eq 'HASH') {
1884: $result.=&hashref2str($hashref->{$_}).'&';
1885: } elsif(ref($hashref->{$_})) {
1886: $result.='&';
1887: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1888: } else {
1889: $result.=&escape($hashref->{$_}).'&';
1890: }
1891: }
1892: $result=~s/\&$//;
1893: $result .= '__END_HASH_REF__';
1894: return $result;
1895: }
1896:
1897: sub str2hash {
1898: my ($string)=@_;
1899: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1900: return %$hash;
1901: }
1902:
1903: sub str2hashref {
1904: my ($string) = @_;
1905:
1906: my %hash;
1907:
1908: if($string !~ /^__HASH_REF__/) {
1909: if (! ($string eq '' || !defined($string))) {
1910: $hash{'error'}='Not hash reference';
1911: }
1912: return (\%hash, $string);
1913: }
1914:
1915: $string =~ s/^__HASH_REF__//;
1916:
1917: while($string !~ /^__END_HASH_REF__/) {
1918: #key
1919: my $key='';
1920: if($string =~ /^__HASH_REF__/) {
1921: ($key, $string)=&str2hashref($string);
1922: if(defined($key->{'error'})) {
1923: $hash{'error'}='Bad data';
1924: return (\%hash, $string);
1925: }
1926: } elsif($string =~ /^__ARRAY_REF__/) {
1927: ($key, $string)=&str2arrayref($string);
1928: if($key->[0] eq 'Array reference error') {
1929: $hash{'error'}='Bad data';
1930: return (\%hash, $string);
1931: }
1932: } else {
1933: $string =~ s/^(.*?)=//;
1934: $key=&unescape($1);
1935: }
1936: $string =~ s/^=//;
1937:
1938: #value
1939: my $value='';
1940: if($string =~ /^__HASH_REF__/) {
1941: ($value, $string)=&str2hashref($string);
1942: if(defined($value->{'error'})) {
1943: $hash{'error'}='Bad data';
1944: return (\%hash, $string);
1945: }
1946: } elsif($string =~ /^__ARRAY_REF__/) {
1947: ($value, $string)=&str2arrayref($string);
1948: if($value->[0] eq 'Array reference error') {
1949: $hash{'error'}='Bad data';
1950: return (\%hash, $string);
1951: }
1952: } else {
1953: $value=&get_scalar(\$string,'__END_HASH_REF__');
1954: }
1955: $string =~ s/^&//;
1956:
1957: $hash{$key}=$value;
1958: }
1959:
1960: $string =~ s/^__END_HASH_REF__//;
1961:
1962: return (\%hash, $string);
1963: }
1964:
1965: sub str2array {
1966: my ($string)=@_;
1967: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1968: return @$array;
1969: }
1970:
1971: sub str2arrayref {
1972: my ($string) = @_;
1973: my @array;
1974:
1975: if($string !~ /^__ARRAY_REF__/) {
1976: if (! ($string eq '' || !defined($string))) {
1977: $array[0]='Array reference error';
1978: }
1979: return (\@array, $string);
1980: }
1981:
1982: $string =~ s/^__ARRAY_REF__//;
1983:
1984: while($string !~ /^__END_ARRAY_REF__/) {
1985: my $value='';
1986: if($string =~ /^__HASH_REF__/) {
1987: ($value, $string)=&str2hashref($string);
1988: if(defined($value->{'error'})) {
1989: $array[0] ='Array reference error';
1990: return (\@array, $string);
1991: }
1992: } elsif($string =~ /^__ARRAY_REF__/) {
1993: ($value, $string)=&str2arrayref($string);
1994: if($value->[0] eq 'Array reference error') {
1995: $array[0] ='Array reference error';
1996: return (\@array, $string);
1997: }
1998: } else {
1999: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
2000: }
2001: $string =~ s/^&//;
2002:
2003: push(@array, $value);
2004: }
2005:
2006: $string =~ s/^__END_ARRAY_REF__//;
2007:
2008: return (\@array, $string);
2009: }
2010:
2011: # -------------------------------------------------------------------Temp Store
2012:
2013: sub tmpreset {
2014: my ($symb,$namespace,$domain,$stuname) = @_;
2015: if (!$symb) {
2016: $symb=&symbread();
2017: if (!$symb) { $symb= $ENV{'request.url'}; }
2018: }
2019: $symb=escape($symb);
2020:
2021: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2022: $namespace=~s/\//\_/g;
2023: $namespace=~s/\W//g;
2024:
2025: if (!$domain) { $domain=$ENV{'user.domain'}; }
2026: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2027: if ($domain eq 'public' && $stuname eq 'public') {
2028: $stuname=$ENV{'REMOTE_ADDR'};
2029: }
2030: my $path=$perlvar{'lonDaemons'}.'/tmp';
2031: my %hash;
2032: if (tie(%hash,'GDBM_File',
2033: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2034: &GDBM_WRCREAT(),0640)) {
2035: foreach my $key (keys %hash) {
2036: if ($key=~ /:$symb/) {
2037: delete($hash{$key});
2038: }
2039: }
2040: }
2041: }
2042:
2043: sub tmpstore {
2044: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2045:
2046: if (!$symb) {
2047: $symb=&symbread();
2048: if (!$symb) { $symb= $ENV{'request.url'}; }
2049: }
2050: $symb=escape($symb);
2051:
2052: if (!$namespace) {
2053: # I don't think we would ever want to store this for a course.
2054: # it seems this will only be used if we don't have a course.
2055: #$namespace=$ENV{'request.course.id'};
2056: #if (!$namespace) {
2057: $namespace=$ENV{'request.state'};
2058: #}
2059: }
2060: $namespace=~s/\//\_/g;
2061: $namespace=~s/\W//g;
2062: if (!$domain) { $domain=$ENV{'user.domain'}; }
2063: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2064: if ($domain eq 'public' && $stuname eq 'public') {
2065: $stuname=$ENV{'REMOTE_ADDR'};
2066: }
2067: my $now=time;
2068: my %hash;
2069: my $path=$perlvar{'lonDaemons'}.'/tmp';
2070: if (tie(%hash,'GDBM_File',
2071: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2072: &GDBM_WRCREAT(),0640)) {
2073: $hash{"version:$symb"}++;
2074: my $version=$hash{"version:$symb"};
2075: my $allkeys='';
2076: foreach my $key (keys(%$storehash)) {
2077: $allkeys.=$key.':';
2078: $hash{"$version:$symb:$key"}=&freeze_escape($$storehash{$key});
2079: }
2080: $hash{"$version:$symb:timestamp"}=$now;
2081: $allkeys.='timestamp';
2082: $hash{"$version:keys:$symb"}=$allkeys;
2083: if (untie(%hash)) {
2084: return 'ok';
2085: } else {
2086: return "error:$!";
2087: }
2088: } else {
2089: return "error:$!";
2090: }
2091: }
2092:
2093: # -----------------------------------------------------------------Temp Restore
2094:
2095: sub tmprestore {
2096: my ($symb,$namespace,$domain,$stuname) = @_;
2097:
2098: if (!$symb) {
2099: $symb=&symbread();
2100: if (!$symb) { $symb= $ENV{'request.url'}; }
2101: }
2102: $symb=escape($symb);
2103:
2104: if (!$namespace) { $namespace=$ENV{'request.state'}; }
2105:
2106: if (!$domain) { $domain=$ENV{'user.domain'}; }
2107: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2108: if ($domain eq 'public' && $stuname eq 'public') {
2109: $stuname=$ENV{'REMOTE_ADDR'};
2110: }
2111: my %returnhash;
2112: $namespace=~s/\//\_/g;
2113: $namespace=~s/\W//g;
2114: my %hash;
2115: my $path=$perlvar{'lonDaemons'}.'/tmp';
2116: if (tie(%hash,'GDBM_File',
2117: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
2118: &GDBM_READER(),0640)) {
2119: my $version=$hash{"version:$symb"};
2120: $returnhash{'version'}=$version;
2121: my $scope;
2122: for ($scope=1;$scope<=$version;$scope++) {
2123: my $vkeys=$hash{"$scope:keys:$symb"};
2124: my @keys=split(/:/,$vkeys);
2125: my $key;
2126: $returnhash{"$scope:keys"}=$vkeys;
2127: foreach $key (@keys) {
2128: $returnhash{"$scope:$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2129: $returnhash{"$key"}=&thaw_unescape($hash{"$scope:$symb:$key"});
2130: }
2131: }
2132: if (!(untie(%hash))) {
2133: return "error:$!";
2134: }
2135: } else {
2136: return "error:$!";
2137: }
2138: return %returnhash;
2139: }
2140:
2141: # ----------------------------------------------------------------------- Store
2142:
2143: sub store {
2144: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2145: my $home='';
2146:
2147: if ($stuname) { $home=&homeserver($stuname,$domain); }
2148:
2149: $symb=&symbclean($symb);
2150: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2151:
2152: if (!$domain) { $domain=$ENV{'user.domain'}; }
2153: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2154:
2155: &devalidate($symb,$stuname,$domain);
2156:
2157: $symb=escape($symb);
2158: if (!$namespace) {
2159: unless ($namespace=$ENV{'request.course.id'}) {
2160: return '';
2161: }
2162: }
2163: if (!$home) { $home=$ENV{'user.home'}; }
2164:
2165: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2166: $$storehash{'host'}=$perlvar{'lonHostID'};
2167:
2168: my $namevalue='';
2169: foreach (keys %$storehash) {
2170: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2171: }
2172: $namevalue=~s/\&$//;
2173: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
2174: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2175: }
2176:
2177: # -------------------------------------------------------------- Critical Store
2178:
2179: sub cstore {
2180: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2181: my $home='';
2182:
2183: if ($stuname) { $home=&homeserver($stuname,$domain); }
2184:
2185: $symb=&symbclean($symb);
2186: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
2187:
2188: if (!$domain) { $domain=$ENV{'user.domain'}; }
2189: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2190:
2191: &devalidate($symb,$stuname,$domain);
2192:
2193: $symb=escape($symb);
2194: if (!$namespace) {
2195: unless ($namespace=$ENV{'request.course.id'}) {
2196: return '';
2197: }
2198: }
2199: if (!$home) { $home=$ENV{'user.home'}; }
2200:
2201: $$storehash{'ip'}=$ENV{'REMOTE_ADDR'};
2202: $$storehash{'host'}=$perlvar{'lonHostID'};
2203:
2204: my $namevalue='';
2205: foreach (keys %$storehash) {
2206: $namevalue.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2207: }
2208: $namevalue=~s/\&$//;
2209: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
2210: return critical
2211: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
2212: }
2213:
2214: # --------------------------------------------------------------------- Restore
2215:
2216: sub restore {
2217: my ($symb,$namespace,$domain,$stuname) = @_;
2218: my $home='';
2219:
2220: if ($stuname) { $home=&homeserver($stuname,$domain); }
2221:
2222: if (!$symb) {
2223: unless ($symb=escape(&symbread())) { return ''; }
2224: } else {
2225: $symb=&escape(&symbclean($symb));
2226: }
2227: if (!$namespace) {
2228: unless ($namespace=$ENV{'request.course.id'}) {
2229: return '';
2230: }
2231: }
2232: if (!$domain) { $domain=$ENV{'user.domain'}; }
2233: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2234: if (!$home) { $home=$ENV{'user.home'}; }
2235: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2236:
2237: my %returnhash=();
2238: foreach (split(/\&/,$answer)) {
2239: my ($name,$value)=split(/\=/,$_);
2240: $returnhash{&unescape($name)}=&thaw_unescape($value);
2241: }
2242: my $version;
2243: for ($version=1;$version<=$returnhash{'version'};$version++) {
2244: foreach (split(/\:/,$returnhash{$version.':keys'})) {
2245: $returnhash{$_}=$returnhash{$version.':'.$_};
2246: }
2247: }
2248: return %returnhash;
2249: }
2250:
2251: # ---------------------------------------------------------- Course Description
2252:
2253: sub coursedescription {
2254: my $courseid=shift;
2255: $courseid=~s/^\///;
2256: $courseid=~s/\_/\//g;
2257: my ($cdomain,$cnum)=split(/\//,$courseid);
2258: my $chome=&homeserver($cnum,$cdomain);
2259: my $normalid=$cdomain.'_'.$cnum;
2260: # need to always cache even if we get errors otherwise we keep
2261: # trying and trying and trying to get the course description.
2262: my %envhash=();
2263: my %returnhash=();
2264: $envhash{'course.'.$normalid.'.last_cache'}=time;
2265: if ($chome ne 'no_host') {
2266: %returnhash=&dump('environment',$cdomain,$cnum);
2267: if (!exists($returnhash{'con_lost'})) {
2268: $returnhash{'home'}= $chome;
2269: $returnhash{'domain'} = $cdomain;
2270: $returnhash{'num'} = $cnum;
2271: while (my ($name,$value) = each %returnhash) {
2272: $envhash{'course.'.$normalid.'.'.$name}=$value;
2273: }
2274: $returnhash{'url'}=&clutter($returnhash{'url'});
2275: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
2276: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
2277: $envhash{'course.'.$normalid.'.home'}=$chome;
2278: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2279: $envhash{'course.'.$normalid.'.num'}=$cnum;
2280: }
2281: }
2282: &appenv(%envhash);
2283: return %returnhash;
2284: }
2285:
2286: # -------------------------------------------------See if a user is privileged
2287:
2288: sub privileged {
2289: my ($username,$domain)=@_;
2290: my $rolesdump=&reply("dump:$domain:$username:roles",
2291: &homeserver($username,$domain));
2292: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return 0; }
2293: my $now=time;
2294: if ($rolesdump ne '') {
2295: foreach (split(/&/,$rolesdump)) {
2296: if ($_!~/^rolesdef_/) {
2297: my ($area,$role)=split(/=/,$_);
2298: $area=~s/\_\w\w$//;
2299: my ($trole,$tend,$tstart)=split(/_/,$role);
2300: if (($trole eq 'dc') || ($trole eq 'su')) {
2301: my $active=1;
2302: if ($tend) {
2303: if ($tend<$now) { $active=0; }
2304: }
2305: if ($tstart) {
2306: if ($tstart>$now) { $active=0; }
2307: }
2308: if ($active) { return 1; }
2309: }
2310: }
2311: }
2312: }
2313: return 0;
2314: }
2315:
2316: # -------------------------------------------------------- Get user privileges
2317:
2318: sub rolesinit {
2319: my ($domain,$username,$authhost)=@_;
2320: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
2321: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
2322: my %allroles=();
2323: my $now=time;
2324: my $userroles="user.login.time=$now\n";
2325:
2326: if ($rolesdump ne '') {
2327: foreach (split(/&/,$rolesdump)) {
2328: if ($_!~/^rolesdef_/) {
2329: my ($area,$role)=split(/=/,$_);
2330: $area=~s/\_\w\w$//;
2331:
2332: my ($trole,$tend,$tstart);
2333: if ($role=~/^cr/) {
2334: ($trole,my $trest)=($role=~m|^(cr/\w+/\w+/[a-zA-Z0-9]+)_(.*)$|);
2335: ($tend,$tstart)=split('_',$trest);
2336: } else {
2337: ($trole,$tend,$tstart)=split(/_/,$role);
2338: }
2339: $userroles.=&set_arearole($trole,$area,$tstart,$tend,$domain,$username);
2340: if (($tend!=0) && ($tend<$now)) { $trole=''; }
2341: if (($tstart!=0) && ($tstart>$now)) { $trole=''; }
2342: if (($area ne '') && ($trole ne '')) {
2343: my $spec=$trole.'.'.$area;
2344: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2345: if ($trole =~ /^cr\//) {
2346: &custom_roleprivs(\%allroles,$trole,$tdomain,$trest,$spec,$area);
2347: } else {
2348: &standard_roleprivs(\%allroles,$trole,$tdomain,$spec,$trest,$area);
2349: }
2350: }
2351: }
2352: }
2353: my ($author,$adv) = &set_userprivs(\$userroles,\%allroles);
2354: $userroles.='user.adv='.$adv."\n".
2355: 'user.author='.$author."\n";
2356: $ENV{'user.adv'}=$adv;
2357: }
2358: return $userroles;
2359: }
2360:
2361: sub set_arearole {
2362: my ($trole,$area,$tstart,$tend,$domain,$username) = @_;
2363: # log the associated role with the area
2364: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
2365: return 'user.role.'.$trole.'.'.$area.'='.$tstart.'.'.$tend."\n";
2366: }
2367:
2368: sub custom_roleprivs {
2369: my ($allroles,$trole,$tdomain,$trest,$spec,$area) = @_;
2370: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
2371: my $homsvr=homeserver($rauthor,$rdomain);
2372: if ($hostname{$homsvr} ne '') {
2373: my ($rdummy,$roledef)=
2374: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2375: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
2376: my ($syspriv,$dompriv,$coursepriv)=split(/\_/,$roledef);
2377: if (defined($syspriv)) {
2378: $$allroles{'cm./'}.=':'.$syspriv;
2379: $$allroles{$spec.'./'}.=':'.$syspriv;
2380: }
2381: if ($tdomain ne '') {
2382: if (defined($dompriv)) {
2383: $$allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2384: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2385: }
2386: if (($trest ne '') && (defined($coursepriv))) {
2387: $$allroles{'cm.'.$area}.=':'.$coursepriv;
2388: $$allroles{$spec.'.'.$area}.=':'.$coursepriv;
2389: }
2390: }
2391: }
2392: }
2393: }
2394:
2395:
2396: sub standard_roleprivs {
2397: my ($allroles,$trole,$tdomain,$spec,$trest,$area) = @_;
2398: if (defined($pr{$trole.':s'})) {
2399: $$allroles{'cm./'}.=':'.$pr{$trole.':s'};
2400: $$allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2401: }
2402: if ($tdomain ne '') {
2403: if (defined($pr{$trole.':d'})) {
2404: $$allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2405: $$allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2406: }
2407: if (($trest ne '') && (defined($pr{$trole.':c'}))) {
2408: $$allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2409: $$allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2410: }
2411: }
2412: }
2413:
2414: sub set_userprivs {
2415: my ($userroles,$allroles) = @_;
2416: my $author=0;
2417: my $adv=0;
2418: foreach (keys %{$allroles}) {
2419: my %thesepriv=();
2420: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
2421: foreach (split(/:/,$$allroles{$_})) {
2422: if ($_ ne '') {
2423: my ($privilege,$restrictions)=split(/&/,$_);
2424: if ($restrictions eq '') {
2425: $thesepriv{$privilege}='F';
2426: } elsif ($thesepriv{$privilege} ne 'F') {
2427: $thesepriv{$privilege}.=$restrictions;
2428: }
2429: if ($thesepriv{'adv'} eq 'F') { $adv=1; }
2430: }
2431: }
2432: my $thesestr='';
2433: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
2434: $$userroles.='user.priv.'.$_.'='.$thesestr."\n";
2435: }
2436: return ($author,$adv);
2437: }
2438:
2439: # --------------------------------------------------------------- get interface
2440:
2441: sub get {
2442: my ($namespace,$storearr,$udomain,$uname)=@_;
2443: my $items='';
2444: foreach (@$storearr) {
2445: $items.=escape($_).'&';
2446: }
2447: $items=~s/\&$//;
2448: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2449: if (!$uname) { $uname=$ENV{'user.name'}; }
2450: my $uhome=&homeserver($uname,$udomain);
2451:
2452: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
2453: my @pairs=split(/\&/,$rep);
2454: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2455: return @pairs;
2456: }
2457: my %returnhash=();
2458: my $i=0;
2459: foreach (@$storearr) {
2460: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2461: $i++;
2462: }
2463: return %returnhash;
2464: }
2465:
2466: # --------------------------------------------------------------- del interface
2467:
2468: sub del {
2469: my ($namespace,$storearr,$udomain,$uname)=@_;
2470: my $items='';
2471: foreach (@$storearr) {
2472: $items.=escape($_).'&';
2473: }
2474: $items=~s/\&$//;
2475: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2476: if (!$uname) { $uname=$ENV{'user.name'}; }
2477: my $uhome=&homeserver($uname,$udomain);
2478:
2479: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
2480: }
2481:
2482: # -------------------------------------------------------------- dump interface
2483:
2484: sub dump {
2485: my ($namespace,$udomain,$uname,$regexp)=@_;
2486: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2487: if (!$uname) { $uname=$ENV{'user.name'}; }
2488: my $uhome=&homeserver($uname,$udomain);
2489: if ($regexp) {
2490: $regexp=&escape($regexp);
2491: } else {
2492: $regexp='.';
2493: }
2494: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
2495: my @pairs=split(/\&/,$rep);
2496: my %returnhash=();
2497: foreach (@pairs) {
2498: my ($key,$value)=split(/=/,$_);
2499: $returnhash{unescape($key)}=&thaw_unescape($value);
2500: }
2501: return %returnhash;
2502: }
2503:
2504: # -------------------------------------------------------------- keys interface
2505:
2506: sub getkeys {
2507: my ($namespace,$udomain,$uname)=@_;
2508: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2509: if (!$uname) { $uname=$ENV{'user.name'}; }
2510: my $uhome=&homeserver($uname,$udomain);
2511: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2512: my @keyarray=();
2513: foreach (split(/\&/,$rep)) {
2514: push (@keyarray,&unescape($_));
2515: }
2516: return @keyarray;
2517: }
2518:
2519: # --------------------------------------------------------------- currentdump
2520: sub currentdump {
2521: my ($courseid,$sdom,$sname)=@_;
2522: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2523: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2524: $sname = $ENV{'user.name'} if (! defined($sname));
2525: my $uhome = &homeserver($sname,$sdom);
2526: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
2527: return if ($rep =~ /^(error:|no_such_host)/);
2528: #
2529: my %returnhash=();
2530: #
2531: if ($rep eq "unknown_cmd") {
2532: # an old lond will not know currentdump
2533: # Do a dump and make it look like a currentdump
2534: my @tmp = &dump($courseid,$sdom,$sname,'.');
2535: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2536: my %hash = @tmp;
2537: @tmp=();
2538: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
2539: } else {
2540: my @pairs=split(/\&/,$rep);
2541: foreach (@pairs) {
2542: my ($key,$value)=split(/=/,$_);
2543: my ($symb,$param) = split(/:/,$key);
2544: $returnhash{&unescape($symb)}->{&unescape($param)} =
2545: &thaw_unescape($value);
2546: }
2547: }
2548: return %returnhash;
2549: }
2550:
2551: sub convert_dump_to_currentdump{
2552: my %hash = %{shift()};
2553: my %returnhash;
2554: # Code ripped from lond, essentially. The only difference
2555: # here is the unescaping done by lonnet::dump(). Conceivably
2556: # we might run in to problems with parameter names =~ /^v\./
2557: while (my ($key,$value) = each(%hash)) {
2558: my ($v,$symb,$param) = split(/:/,$key);
2559: next if ($v eq 'version' || $symb eq 'keys');
2560: next if (exists($returnhash{$symb}) &&
2561: exists($returnhash{$symb}->{$param}) &&
2562: $returnhash{$symb}->{'v.'.$param} > $v);
2563: $returnhash{$symb}->{$param}=$value;
2564: $returnhash{$symb}->{'v.'.$param}=$v;
2565: }
2566: #
2567: # Remove all of the keys in the hashes which keep track of
2568: # the version of the parameter.
2569: while (my ($symb,$param_hash) = each(%returnhash)) {
2570: # use a foreach because we are going to delete from the hash.
2571: foreach my $key (keys(%$param_hash)) {
2572: delete($param_hash->{$key}) if ($key =~ /^v\./);
2573: }
2574: }
2575: return \%returnhash;
2576: }
2577:
2578: # --------------------------------------------------------------- inc interface
2579:
2580: sub inc {
2581: my ($namespace,$store,$udomain,$uname) = @_;
2582: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2583: if (!$uname) { $uname=$ENV{'user.name'}; }
2584: my $uhome=&homeserver($uname,$udomain);
2585: my $items='';
2586: if (! ref($store)) {
2587: # got a single value, so use that instead
2588: $items = &escape($store).'=&';
2589: } elsif (ref($store) eq 'SCALAR') {
2590: $items = &escape($$store).'=&';
2591: } elsif (ref($store) eq 'ARRAY') {
2592: $items = join('=&',map {&escape($_);} @{$store});
2593: } elsif (ref($store) eq 'HASH') {
2594: while (my($key,$value) = each(%{$store})) {
2595: $items.= &escape($key).'='.&escape($value).'&';
2596: }
2597: }
2598: $items=~s/\&$//;
2599: return &reply("inc:$udomain:$uname:$namespace:$items",$uhome);
2600: }
2601:
2602: # --------------------------------------------------------------- put interface
2603:
2604: sub put {
2605: my ($namespace,$storehash,$udomain,$uname)=@_;
2606: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2607: if (!$uname) { $uname=$ENV{'user.name'}; }
2608: my $uhome=&homeserver($uname,$udomain);
2609: my $items='';
2610: foreach (keys %$storehash) {
2611: $items.=&escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2612: }
2613: $items=~s/\&$//;
2614: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2615: }
2616:
2617: # ---------------------------------------------------------- putstore interface
2618:
2619: sub putstore {
2620: my ($namespace,$storehash,$udomain,$uname)=@_;
2621: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2622: if (!$uname) { $uname=$ENV{'user.name'}; }
2623: my $uhome=&homeserver($uname,$udomain);
2624: my $items='';
2625: my %allitems = ();
2626: foreach (keys %$storehash) {
2627: if ($_ =~ m/^([^\:]+):([^\:]+):([^\:]+)$/) {
2628: my $key = $1.':keys:'.$2;
2629: $allitems{$key} .= $3.':';
2630: }
2631: $items.=$_.'='.&freeze_escape($$storehash{$_}).'&';
2632: }
2633: foreach (keys %allitems) {
2634: $allitems{$_} =~ s/\:$//;
2635: $items.= $_.'='.$allitems{$_}.'&';
2636: }
2637: $items=~s/\&$//;
2638: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
2639: }
2640:
2641: # ------------------------------------------------------ critical put interface
2642:
2643: sub cput {
2644: my ($namespace,$storehash,$udomain,$uname)=@_;
2645: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2646: if (!$uname) { $uname=$ENV{'user.name'}; }
2647: my $uhome=&homeserver($uname,$udomain);
2648: my $items='';
2649: foreach (keys %$storehash) {
2650: $items.=escape($_).'='.&freeze_escape($$storehash{$_}).'&';
2651: }
2652: $items=~s/\&$//;
2653: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
2654: }
2655:
2656: # -------------------------------------------------------------- eget interface
2657:
2658: sub eget {
2659: my ($namespace,$storearr,$udomain,$uname)=@_;
2660: my $items='';
2661: foreach (@$storearr) {
2662: $items.=escape($_).'&';
2663: }
2664: $items=~s/\&$//;
2665: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2666: if (!$uname) { $uname=$ENV{'user.name'}; }
2667: my $uhome=&homeserver($uname,$udomain);
2668: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
2669: my @pairs=split(/\&/,$rep);
2670: my %returnhash=();
2671: my $i=0;
2672: foreach (@$storearr) {
2673: $returnhash{$_}=&thaw_unescape($pairs[$i]);
2674: $i++;
2675: }
2676: return %returnhash;
2677: }
2678:
2679: # ---------------------------------------------- Custom access rule evaluation
2680:
2681: sub customaccess {
2682: my ($priv,$uri)=@_;
2683: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
2684: $urealm=~s/^\W//;
2685: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
2686: my $access=0;
2687: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
2688: my ($effect,$realm,$role)=split(/\:/,$_);
2689: if ($role) {
2690: if ($role ne $urole) { next; }
2691: }
2692: foreach (split(/\s*\,\s*/,$realm)) {
2693: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2694: if ($tdom) {
2695: if ($tdom ne $udom) { next; }
2696: }
2697: if ($tcrs) {
2698: if ($tcrs ne $ucrs) { next; }
2699: }
2700: if ($tsec) {
2701: if ($tsec ne $usec) { next; }
2702: }
2703: $access=($effect eq 'allow');
2704: last;
2705: }
2706: if ($realm eq '' && $role eq '') {
2707: $access=($effect eq 'allow');
2708: }
2709: }
2710: return $access;
2711: }
2712:
2713: # ------------------------------------------------- Check for a user privilege
2714:
2715: sub allowed {
2716: my ($priv,$uri,$symb)=@_;
2717: $uri=&deversion($uri);
2718: my $orguri=$uri;
2719: $uri=&declutter($uri);
2720:
2721:
2722:
2723: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
2724: # Free bre access to adm and meta resources
2725: if (((($uri=~/^adm\//) && ($uri !~ m|/bulletinboard$|))
2726: || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
2727: return 'F';
2728: }
2729:
2730: # Free bre access to user's own portfolio contents
2731: my ($space,$domain,$name,$dir)=split('/',$uri);
2732: if (($space=~/^(uploaded|ediupload)$/) && ($ENV{'user.name'} eq $name) &&
2733: ($ENV{'user.domain'} eq $domain) && ('portfolio' eq $dir)) {
2734: return 'F';
2735: }
2736:
2737: # Free bre to public access
2738:
2739: if ($priv eq 'bre') {
2740: my $copyright=&metadata($uri,'copyright');
2741: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2742: return 'F';
2743: }
2744: if ($copyright eq 'priv') {
2745: $uri=~/([^\/]+)\/([^\/]+)\//;
2746: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2747: return '';
2748: }
2749: }
2750: if ($copyright eq 'domain') {
2751: $uri=~/([^\/]+)\/([^\/]+)\//;
2752: unless (($ENV{'user.domain'} eq $1) ||
2753: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2754: return '';
2755: }
2756: }
2757: if ($ENV{'request.role'}=~ /li\.\//) {
2758: # Library role, so allow browsing of resources in this domain.
2759: return 'F';
2760: }
2761: if ($copyright eq 'custom') {
2762: unless (&customaccess($priv,$uri)) { return ''; }
2763: }
2764: }
2765: # Domain coordinator is trying to create a course
2766: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2767: # uri is the requested domain in this case.
2768: # comparison to 'request.role.domain' shows if the user has selected
2769: # a role of dc for the domain in question.
2770: return 'F' if ($uri eq $ENV{'request.role.domain'});
2771: }
2772:
2773: my $thisallowed='';
2774: my $statecond=0;
2775: my $courseprivid='';
2776:
2777: # Course
2778:
2779: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/\Q$priv\E\&([^\:]*)/) {
2780: $thisallowed.=$1;
2781: }
2782:
2783: # Domain
2784:
2785: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2786: =~/\Q$priv\E\&([^\:]*)/) {
2787: $thisallowed.=$1;
2788: }
2789:
2790: # Course: uri itself is a course
2791: my $courseuri=$uri;
2792: $courseuri=~s/\_(\d)/\/$1/;
2793: $courseuri=~s/^([^\/])/\/$1/;
2794:
2795: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
2796: =~/\Q$priv\E\&([^\:]*)/) {
2797: $thisallowed.=$1;
2798: }
2799:
2800: # URI is an uploaded document for this course
2801: # not allowing 'edit' access (editupload) to uploaded course docs
2802: if (($priv eq 'bre') && ($uri=~m|^uploaded/|)) {
2803: my $refuri=$ENV{'httpref.'.$orguri};
2804: if ($refuri) {
2805: if ($refuri =~ m|^/adm/|) {
2806: $thisallowed='F';
2807: }
2808: }
2809: }
2810:
2811: # Full access at system, domain or course-wide level? Exit.
2812:
2813: if ($thisallowed=~/F/) {
2814: return 'F';
2815: }
2816:
2817: # If this is generating or modifying users, exit with special codes
2818:
2819: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:\Q$priv\E\:/) {
2820: return $thisallowed;
2821: }
2822: #
2823: # Gathered so far: system, domain and course wide privileges
2824: #
2825: # Course: See if uri or referer is an individual resource that is part of
2826: # the course
2827:
2828: if ($ENV{'request.course.id'}) {
2829:
2830: $courseprivid=$ENV{'request.course.id'};
2831: if ($ENV{'request.course.sec'}) {
2832: $courseprivid.='/'.$ENV{'request.course.sec'};
2833: }
2834: $courseprivid=~s/\_/\//;
2835: my $checkreferer=1;
2836: my ($match,$cond)=&is_on_map($uri);
2837: if ($match) {
2838: $statecond=$cond;
2839: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2840: =~/\Q$priv\E\&([^\:]*)/) {
2841: $thisallowed.=$1;
2842: $checkreferer=0;
2843: }
2844: }
2845:
2846: if ($checkreferer) {
2847: my $refuri=$ENV{'httpref.'.$orguri};
2848: unless ($refuri) {
2849: foreach (keys %ENV) {
2850: if ($_=~/^httpref\..*\*/) {
2851: my $pattern=$_;
2852: $pattern=~s/^httpref\.\/res\///;
2853: $pattern=~s/\*/\[\^\/\]\+/g;
2854: $pattern=~s/\//\\\//g;
2855: if ($orguri=~/$pattern/) {
2856: $refuri=$ENV{$_};
2857: }
2858: }
2859: }
2860: }
2861:
2862: if ($refuri) {
2863: $refuri=&declutter($refuri);
2864: my ($match,$cond)=&is_on_map($refuri);
2865: if ($match) {
2866: my $refstatecond=$cond;
2867: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2868: =~/\Q$priv\E\&([^\:]*)/) {
2869: $thisallowed.=$1;
2870: $uri=$refuri;
2871: $statecond=$refstatecond;
2872: }
2873: }
2874: }
2875: }
2876: }
2877:
2878: #
2879: # Gathered now: all privileges that could apply, and condition number
2880: #
2881: #
2882: # Full or no access?
2883: #
2884:
2885: if ($thisallowed=~/F/) {
2886: return 'F';
2887: }
2888:
2889: unless ($thisallowed) {
2890: return '';
2891: }
2892:
2893: # Restrictions exist, deal with them
2894: #
2895: # C:according to course preferences
2896: # R:according to resource settings
2897: # L:unless locked
2898: # X:according to user session state
2899: #
2900:
2901: # Possibly locked functionality, check all courses
2902: # Locks might take effect only after 10 minutes cache expiration for other
2903: # courses, and 2 minutes for current course
2904:
2905: my $envkey;
2906: if ($thisallowed=~/L/) {
2907: foreach $envkey (keys %ENV) {
2908: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2909: my $courseid=$2;
2910: my $roleid=$1.'.'.$2;
2911: $courseid=~s/^\///;
2912: my $expiretime=600;
2913: if ($ENV{'request.role'} eq $roleid) {
2914: $expiretime=120;
2915: }
2916: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2917: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2918: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2919: &coursedescription($courseid);
2920: }
2921: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,\Q$csec\E\,/)
2922: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2923: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
2924: &log($ENV{'user.domain'},$ENV{'user.name'},
2925: $ENV{'user.home'},
2926: 'Locked by res: '.$priv.' for '.$uri.' due to '.
2927: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2928: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2929: return '';
2930: }
2931: }
2932: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,\Q$csec\E\,/)
2933: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2934: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
2935: &log($ENV{'user.domain'},$ENV{'user.name'},
2936: $ENV{'user.home'},
2937: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
2938: $cdom.'/'.$cnum.'/'.$csec.' expire '.
2939: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
2940: return '';
2941: }
2942: }
2943: }
2944: }
2945: }
2946:
2947: #
2948: # Rest of the restrictions depend on selected course
2949: #
2950:
2951: unless ($ENV{'request.course.id'}) {
2952: return '1';
2953: }
2954:
2955: #
2956: # Now user is definitely in a course
2957: #
2958:
2959:
2960: # Course preferences
2961:
2962: if ($thisallowed=~/C/) {
2963: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2964: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
2965: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
2966: =~/\Q$rolecode\E/) {
2967: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2968: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
2969: $ENV{'request.course.id'});
2970: return '';
2971: }
2972:
2973: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2974: =~/\Q$unamedom\E/) {
2975: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2976: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
2977: $ENV{'request.course.id'});
2978: return '';
2979: }
2980: }
2981:
2982: # Resource preferences
2983:
2984: if ($thisallowed=~/R/) {
2985: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
2986: if (&metadata($uri,'roledeny')=~/\Q$rolecode\E/) {
2987: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2988: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
2989: return '';
2990: }
2991: }
2992:
2993: # Restricted by state or randomout?
2994:
2995: if ($thisallowed=~/X/) {
2996: if ($ENV{'acc.randomout'}) {
2997: if (!$symb) { $symb=&symbread($uri,1); }
2998: if (($symb) && ($ENV{'acc.randomout'}=~/\&\Q$symb\E\&/)) {
2999: return '';
3000: }
3001: }
3002: if (&condval($statecond)) {
3003: return '2';
3004: } else {
3005: return '';
3006: }
3007: }
3008:
3009: return 'F';
3010: }
3011:
3012: # --------------------------------------------------- Is a resource on the map?
3013:
3014: sub is_on_map {
3015: my $uri=&declutter(shift);
3016: $uri=~s/\.\d+\.(\w+)$/\.$1/;
3017: my @uriparts=split(/\//,$uri);
3018: my $filename=$uriparts[$#uriparts];
3019: my $pathname=$uri;
3020: $pathname=~s|/\Q$filename\E$||;
3021: $pathname=~s/^adm\/wrapper\///;
3022: #Trying to find the conditional for the file
3023: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
3024: /\&\Q$filename\E\:([\d\|]+)\&/);
3025: if ($match) {
3026: return (1,$1);
3027: } else {
3028: return (0,0);
3029: }
3030: }
3031:
3032: # --------------------------------------------------------- Get symb from alias
3033:
3034: sub get_symb_from_alias {
3035: my $symb=shift;
3036: my ($map,$resid,$url)=&decode_symb($symb);
3037: # Already is a symb
3038: if ($url) { return $symb; }
3039: # Must be an alias
3040: my $aliassymb='';
3041: my %bighash;
3042: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3043: &GDBM_READER(),0640)) {
3044: my $rid=$bighash{'mapalias_'.$symb};
3045: if ($rid) {
3046: my ($mapid,$resid)=split(/\./,$rid);
3047: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
3048: $resid,$bighash{'src_'.$rid});
3049: }
3050: untie %bighash;
3051: }
3052: return $aliassymb;
3053: }
3054:
3055: # ----------------------------------------------------------------- Define Role
3056:
3057: sub definerole {
3058: if (allowed('mcr','/')) {
3059: my ($rolename,$sysrole,$domrole,$courole)=@_;
3060: foreach (split(':',$sysrole)) {
3061: my ($crole,$cqual)=split(/\&/,$_);
3062: if ($pr{'cr:s'}!~/\Q$crole\E/) { return "refused:s:$crole"; }
3063: if ($pr{'cr:s'}=~/\Q$crole\E\&/) {
3064: if ($pr{'cr:s'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3065: return "refused:s:$crole&$cqual";
3066: }
3067: }
3068: }
3069: foreach (split(':',$domrole)) {
3070: my ($crole,$cqual)=split(/\&/,$_);
3071: if ($pr{'cr:d'}!~/\Q$crole\E/) { return "refused:d:$crole"; }
3072: if ($pr{'cr:d'}=~/\Q$crole\E\&/) {
3073: if ($pr{'cr:d'}!~/\Q$crole\W\&\w*\Q$cqual\E/) {
3074: return "refused:d:$crole&$cqual";
3075: }
3076: }
3077: }
3078: foreach (split(':',$courole)) {
3079: my ($crole,$cqual)=split(/\&/,$_);
3080: if ($pr{'cr:c'}!~/\Q$crole\E/) { return "refused:c:$crole"; }
3081: if ($pr{'cr:c'}=~/\Q$crole\E\&/) {
3082: if ($pr{'cr:c'}!~/\Q$crole\E\&\w*\Q$cqual\E/) {
3083: return "refused:c:$crole&$cqual";
3084: }
3085: }
3086: }
3087: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3088: "$ENV{'user.domain'}:$ENV{'user.name'}:".
3089: "rolesdef_$rolename=".
3090: escape($sysrole.'_'.$domrole.'_'.$courole);
3091: return reply($command,$ENV{'user.home'});
3092: } else {
3093: return 'refused';
3094: }
3095: }
3096:
3097: # ---------------- Make a metadata query against the network of library servers
3098:
3099: sub metadata_query {
3100: my ($query,$custom,$customshow,$server_array)=@_;
3101: my %rhash;
3102: my @server_list = (defined($server_array) ? @$server_array
3103: : keys(%libserv) );
3104: for my $server (@server_list) {
3105: unless ($custom or $customshow) {
3106: my $reply=&reply("querysend:".&escape($query),$server);
3107: $rhash{$server}=$reply;
3108: }
3109: else {
3110: my $reply=&reply("querysend:".&escape($query).':'.
3111: &escape($custom).':'.&escape($customshow),
3112: $server);
3113: $rhash{$server}=$reply;
3114: }
3115: }
3116: return \%rhash;
3117: }
3118:
3119: # ----------------------------------------- Send log queries and wait for reply
3120:
3121: sub log_query {
3122: my ($uname,$udom,$query,%filters)=@_;
3123: my $uhome=&homeserver($uname,$udom);
3124: if ($uhome eq 'no_host') { return 'error: no_host'; }
3125: my $uhost=$hostname{$uhome};
3126: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
3127: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
3128: $uhome);
3129: unless ($queryid=~/^\Q$uhost\E\_/) { return 'error: '.$queryid; }
3130: return get_query_reply($queryid);
3131: }
3132:
3133: # ------- Request retrieval of institutional classlists for course(s)
3134:
3135: sub fetch_enrollment_query {
3136: my ($context,$affiliatesref,$replyref,$dom,$cnum) = @_;
3137: my $homeserver;
3138: my $maxtries = 1;
3139: if ($context eq 'automated') {
3140: $homeserver = $perlvar{'lonHostID'};
3141: $maxtries = 10; # will wait for up to 2000s for retrieval of classlist data before timeout
3142: } else {
3143: $homeserver = &homeserver($cnum,$dom);
3144: }
3145: my $host=$hostname{$homeserver};
3146: my $cmd = '';
3147: foreach (keys %{$affiliatesref}) {
3148: $cmd .= $_.'='.join(",",@{$$affiliatesref{$_}}).'%%';
3149: }
3150: $cmd =~ s/%%$//;
3151: $cmd = &escape($cmd);
3152: my $query = 'fetchenrollment';
3153: my $queryid=&reply("querysend:".$query.':'.$dom.':'.$ENV{'user.name'}.':'.$cmd,$homeserver);
3154: unless ($queryid=~/^\Q$host\E\_/) {
3155: &logthis('fetch_enrollment_query: invalid queryid: '.$queryid.' for host: '.$host.' and homeserver: '.$homeserver.' context: '.$context.' '.$cnum);
3156: return 'error: '.$queryid;
3157: }
3158: my $reply = &get_query_reply($queryid);
3159: my $tries = 1;
3160: while (($reply=~/^timeout/) && ($tries < $maxtries)) {
3161: $reply = &get_query_reply($queryid);
3162: $tries ++;
3163: }
3164: if ( ($reply =~/^timeout/) || ($reply =~/^error/) ) {
3165: &logthis('fetch_enrollment_query error: '.$reply.' for '.$dom.' '.$ENV{'user.name'}.' for '.$queryid.' context: '.$context.' '.$cnum.' maxtries: '.$maxtries.' tries: '.$tries);
3166: } else {
3167: my @responses = split/:/,$reply;
3168: if ($homeserver eq $perlvar{'lonHostID'}) {
3169: foreach (@responses) {
3170: my ($key,$value) = split/=/,$_;
3171: $$replyref{$key} = $value;
3172: }
3173: } else {
3174: my $pathname = $perlvar{'lonDaemons'}.'/tmp';
3175: foreach (@responses) {
3176: my ($key,$value) = split/=/,$_;
3177: $$replyref{$key} = $value;
3178: if ($value > 0) {
3179: foreach (@{$$affiliatesref{$key}}) {
3180: my $filename = $dom.'_'.$key.'_'.$_.'_classlist.xml';
3181: my $destname = $pathname.'/'.$filename;
3182: my $xml_classlist = &reply("autoretrieve:".$filename,$homeserver);
3183: if ($xml_classlist =~ /^error/) {
3184: &logthis('fetch_enrollment_query - autoretrieve error: '.$xml_classlist.' for '.$filename.' from server: '.$homeserver.' '.$context.' '.$cnum);
3185: } else {
3186: if ( open(FILE,">$destname") ) {
3187: print FILE &unescape($xml_classlist);
3188: close(FILE);
3189: } else {
3190: &logthis('fetch_enrollment_query - error opening classlist file '.$destname.' '.$context.' '.$cnum);
3191: }
3192: }
3193: }
3194: }
3195: }
3196: }
3197: return 'ok';
3198: }
3199: return 'error';
3200: }
3201:
3202: sub get_query_reply {
3203: my $queryid=shift;
3204: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
3205: my $reply='';
3206: for (1..100) {
3207: sleep 2;
3208: if (-e $replyfile.'.end') {
3209: if (open(my $fh,$replyfile)) {
3210: $reply.=<$fh>;
3211: close($fh);
3212: } else { return 'error: reply_file_error'; }
3213: return &unescape($reply);
3214: }
3215: }
3216: return 'timeout:'.$queryid;
3217: }
3218:
3219: sub courselog_query {
3220: #
3221: # possible filters:
3222: # url: url or symb
3223: # username
3224: # domain
3225: # action: view, submit, grade
3226: # start: timestamp
3227: # end: timestamp
3228: #
3229: my (%filters)=@_;
3230: unless ($ENV{'request.course.id'}) { return 'no_course'; }
3231: if ($filters{'url'}) {
3232: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
3233: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
3234: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
3235: }
3236: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
3237: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
3238: return &log_query($cname,$cdom,'courselog',%filters);
3239: }
3240:
3241: sub userlog_query {
3242: my ($uname,$udom,%filters)=@_;
3243: return &log_query($uname,$udom,'userlog',%filters);
3244: }
3245:
3246: #--------- Call auto-enrollment subs in localenroll.pm for homeserver for course
3247:
3248: sub auto_run {
3249: my ($cnum,$cdom) = @_;
3250: my $homeserver = &homeserver($cnum,$cdom);
3251: my $response = &reply('autorun:'.$cdom,$homeserver);
3252: return $response;
3253: }
3254:
3255: sub auto_get_sections {
3256: my ($cnum,$cdom,$inst_coursecode) = @_;
3257: my $homeserver = &homeserver($cnum,$cdom);
3258: my @secs = ();
3259: my $response=&unescape(&reply('autogetsections:'.$inst_coursecode.':'.$cdom,$homeserver));
3260: unless ($response eq 'refused') {
3261: @secs = split/:/,$response;
3262: }
3263: return @secs;
3264: }
3265:
3266: sub auto_new_course {
3267: my ($cnum,$cdom,$inst_course_id,$owner) = @_;
3268: my $homeserver = &homeserver($cnum,$cdom);
3269: my $response=&unescape(&reply('autonewcourse:'.$inst_course_id.':'.$owner.':'.$cdom,$homeserver));
3270: return $response;
3271: }
3272:
3273: sub auto_validate_courseID {
3274: my ($cnum,$cdom,$inst_course_id) = @_;
3275: my $homeserver = &homeserver($cnum,$cdom);
3276: my $response=&unescape(&reply('autovalidatecourse:'.$inst_course_id.':'.$cdom,$homeserver));
3277: return $response;
3278: }
3279:
3280: sub auto_create_password {
3281: my ($cnum,$cdom,$authparam) = @_;
3282: my $homeserver = &homeserver($cnum,$cdom);
3283: my $create_passwd = 0;
3284: my $authchk = '';
3285: my $response=&unescape(&reply('autocreatepassword:'.$authparam.':'.$cdom,$homeserver));
3286: if ($response eq 'refused') {
3287: $authchk = 'refused';
3288: } else {
3289: ($authparam,$create_passwd,$authchk) = split/:/,$response;
3290: }
3291: return ($authparam,$create_passwd,$authchk);
3292: }
3293:
3294: sub auto_instcode_format {
3295: my ($caller,$codedom,$instcodes,$codes,$codetitles,$cat_titles,$cat_order) = @_;
3296: my $courses = '';
3297: my $homeserver;
3298: if ($caller eq 'global') {
3299: foreach my $tryserver (keys %libserv) {
3300: if ($hostdom{$tryserver} eq $codedom) {
3301: $homeserver = $tryserver;
3302: last;
3303: }
3304: }
3305: if (($ENV{'user.name'}) && ($ENV{'user.domain'} eq $codedom)) {
3306: $homeserver = &homeserver($ENV{'user.name'},$codedom);
3307: }
3308: } else {
3309: $homeserver = &homeserver($caller,$codedom);
3310: }
3311: foreach (keys %{$instcodes}) {
3312: $courses .= &escape($_).'='.&escape($$instcodes{$_}).'&';
3313: }
3314: chop($courses);
3315: my $response=&reply('autoinstcodeformat:'.$codedom.':'.$courses,$homeserver);
3316: unless ($response =~ /(con_lost|error|no_such_host|refused)/) {
3317: my ($codes_str,$codetitles_str,$cat_titles_str,$cat_order_str) = split/:/,$response;
3318: %{$codes} = &str2hash($codes_str);
3319: @{$codetitles} = &str2array($codetitles_str);
3320: %{$cat_titles} = &str2hash($cat_titles_str);
3321: %{$cat_order} = &str2hash($cat_order_str);
3322: return 'ok';
3323: }
3324: return $response;
3325: }
3326:
3327: # ------------------------------------------------------------------ Plain Text
3328:
3329: sub plaintext {
3330: my $short=shift;
3331: return &mt($prp{$short});
3332: }
3333:
3334: # ----------------------------------------------------------------- Assign Role
3335:
3336: sub assignrole {
3337: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
3338: my $mrole;
3339: if ($role =~ /^cr\//) {
3340: my $cwosec=$url;
3341: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3342: unless (&allowed('ccr',$cwosec)) {
3343: &logthis('Refused custom assignrole: '.
3344: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3345: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3346: return 'refused';
3347: }
3348: $mrole='cr';
3349: } else {
3350: my $cwosec=$url;
3351: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
3352: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
3353: &logthis('Refused assignrole: '.
3354: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
3355: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3356: return 'refused';
3357: }
3358: $mrole=$role;
3359: }
3360: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
3361: "$udom:$uname:$url".'_'."$mrole=$role";
3362: if ($end) { $command.='_'.$end; }
3363: if ($start) {
3364: if ($end) {
3365: $command.='_'.$start;
3366: } else {
3367: $command.='_0_'.$start;
3368: }
3369: }
3370: # actually delete
3371: if ($deleteflag) {
3372: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
3373: # modify command to delete the role
3374: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
3375: "$udom:$uname:$url".'_'."$mrole";
3376: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
3377: # set start and finish to negative values for userrolelog
3378: $start=-1;
3379: $end=-1;
3380: }
3381: }
3382: # send command
3383: my $answer=&reply($command,&homeserver($uname,$udom));
3384: # log new user role if status is ok
3385: if ($answer eq 'ok') {
3386: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
3387: }
3388: return $answer;
3389: }
3390:
3391: # -------------------------------------------------- Modify user authentication
3392: # Overrides without validation
3393:
3394: sub modifyuserauth {
3395: my ($udom,$uname,$umode,$upass)=@_;
3396: my $uhome=&homeserver($uname,$udom);
3397: unless (&allowed('mau',$udom)) { return 'refused'; }
3398: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
3399: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3400: ' in domain '.$ENV{'request.role.domain'});
3401: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
3402: &escape($upass),$uhome);
3403: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
3404: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
3405: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3406: &log($udom,,$uname,$uhome,
3407: 'Authentication changed by '.$ENV{'user.domain'}.', '.
3408: $ENV{'user.name'}.', '.$umode.
3409: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
3410: unless ($reply eq 'ok') {
3411: &logthis('Authentication mode error: '.$reply);
3412: return 'error: '.$reply;
3413: }
3414: return 'ok';
3415: }
3416:
3417: # --------------------------------------------------------------- Modify a user
3418:
3419: sub modifyuser {
3420: my ($udom, $uname, $uid,
3421: $umode, $upass, $first,
3422: $middle, $last, $gene,
3423: $forceid, $desiredhome, $email)=@_;
3424: $udom=~s/\W//g;
3425: $uname=~s/\W//g;
3426: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
3427: $umode.', '.$first.', '.$middle.', '.
3428: $last.', '.$gene.'(forceid: '.$forceid.')'.
3429: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3430: ' desiredhome not specified').
3431: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3432: ' in domain '.$ENV{'request.role.domain'});
3433: my $uhome=&homeserver($uname,$udom,'true');
3434: # ----------------------------------------------------------------- Create User
3435: if (($uhome eq 'no_host') &&
3436: (($umode && $upass) || ($umode eq 'localauth'))) {
3437: my $unhome='';
3438: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3439: $unhome = $desiredhome;
3440: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
3441: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
3442: } else { # load balancing routine for determining $unhome
3443: my $tryserver;
3444: my $loadm=10000000;
3445: foreach $tryserver (keys %libserv) {
3446: if ($hostdom{$tryserver} eq $udom) {
3447: my $answer=reply('load',$tryserver);
3448: if (($answer=~/\d+/) && ($answer<$loadm)) {
3449: $loadm=$answer;
3450: $unhome=$tryserver;
3451: }
3452: }
3453: }
3454: }
3455: if (($unhome eq '') || ($unhome eq 'no_host')) {
3456: return 'error: unable to find a home server for '.$uname.
3457: ' in domain '.$udom;
3458: }
3459: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3460: &escape($upass),$unhome);
3461: unless ($reply eq 'ok') {
3462: return 'error: '.$reply;
3463: }
3464: $uhome=&homeserver($uname,$udom,'true');
3465: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
3466: return 'error: unable verify users home machine.';
3467: }
3468: } # End of creation of new user
3469: # ---------------------------------------------------------------------- Add ID
3470: if ($uid) {
3471: $uid=~tr/A-Z/a-z/;
3472: my %uidhash=&idrget($udom,$uname);
3473: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3474: && (!$forceid)) {
3475: unless ($uid eq $uidhash{$uname}) {
3476: return 'error: user id "'.$uid.'" does not match '.
3477: 'current user id "'.$uidhash{$uname}.'".';
3478: }
3479: } else {
3480: &idput($udom,($uname => $uid));
3481: }
3482: }
3483: # -------------------------------------------------------------- Add names, etc
3484: my @tmp=&get('environment',
3485: ['firstname','middlename','lastname','generation'],
3486: $udom,$uname);
3487: my %names;
3488: if ($tmp[0] =~ m/^error:.*/) {
3489: %names=();
3490: } else {
3491: %names = @tmp;
3492: }
3493: #
3494: # Make sure to not trash student environment if instructor does not bother
3495: # to supply name and email information
3496: #
3497: if ($first) { $names{'firstname'} = $first; }
3498: if (defined($middle)) { $names{'middlename'} = $middle; }
3499: if ($last) { $names{'lastname'} = $last; }
3500: if (defined($gene)) { $names{'generation'} = $gene; }
3501: if ($email) {
3502: $email=~s/[^\w\@\.\-\,]//gs;
3503: if ($email=~/\@/) { $names{'notification'} = $email;
3504: $names{'critnotification'} = $email;
3505: $names{'permanentemail'} = $email; }
3506: }
3507: my $reply = &put('environment', \%names, $udom,$uname);
3508: if ($reply ne 'ok') { return 'error: '.$reply; }
3509: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
3510: $umode.', '.$first.', '.$middle.', '.
3511: $last.', '.$gene.' by '.
3512: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
3513: return 'ok';
3514: }
3515:
3516: # -------------------------------------------------------------- Modify student
3517:
3518: sub modifystudent {
3519: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
3520: $end,$start,$forceid,$desiredhome,$email,$type,$locktype,$cid)=@_;
3521: if (!$cid) {
3522: unless ($cid=$ENV{'request.course.id'}) {
3523: return 'not_in_class';
3524: }
3525: }
3526: # --------------------------------------------------------------- Make the user
3527: my $reply=&modifyuser
3528: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
3529: $desiredhome,$email);
3530: unless ($reply eq 'ok') { return $reply; }
3531: # This will cause &modify_student_enrollment to get the uid from the
3532: # students environment
3533: $uid = undef if (!$forceid);
3534: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,$last,
3535: $gene,$usec,$end,$start,$type,$locktype,$cid);
3536: return $reply;
3537: }
3538:
3539: sub modify_student_enrollment {
3540: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start,$type,$locktype,$cid) = @_;
3541: my ($cdom,$cnum,$chome);
3542: if (!$cid) {
3543: unless ($cid=$ENV{'request.course.id'}) {
3544: return 'not_in_class';
3545: }
3546: $cdom=$ENV{'course.'.$cid.'.domain'};
3547: $cnum=$ENV{'course.'.$cid.'.num'};
3548: } else {
3549: ($cdom,$cnum)=split(/_/,$cid);
3550: }
3551: $chome=$ENV{'course.'.$cid.'.home'};
3552: if (!$chome) {
3553: $chome=&homeserver($cnum,$cdom);
3554: }
3555: if (!$chome) { return 'unknown_course'; }
3556: # Make sure the user exists
3557: my $uhome=&homeserver($uname,$udom);
3558: if (($uhome eq '') || ($uhome eq 'no_host')) {
3559: return 'error: no such user';
3560: }
3561: # Get student data if we were not given enough information
3562: if (!defined($first) || $first eq '' ||
3563: !defined($last) || $last eq '' ||
3564: !defined($uid) || $uid eq '' ||
3565: !defined($middle) || $middle eq '' ||
3566: !defined($gene) || $gene eq '') {
3567: # They did not supply us with enough data to enroll the student, so
3568: # we need to pick up more information.
3569: my %tmp = &get('environment',
3570: ['firstname','middlename','lastname', 'generation','id']
3571: ,$udom,$uname);
3572:
3573: #foreach (keys(%tmp)) {
3574: # &logthis("key $_ = ".$tmp{$_});
3575: #}
3576: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3577: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3578: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
3579: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
3580: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3581: }
3582: my $fullname = &format_name($first,$middle,$last,$gene,'lastname');
3583: my $reply=cput('classlist',
3584: {"$uname:$udom" =>
3585: join(':',$end,$start,$uid,$usec,$fullname,$type,$locktype) },
3586: $cdom,$cnum);
3587: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3588: return 'error: '.$reply;
3589: }
3590: # Add student role to user
3591: my $uurl='/'.$cid;
3592: $uurl=~s/\_/\//g;
3593: if ($usec) {
3594: $uurl.='/'.$usec;
3595: }
3596: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
3597: }
3598:
3599: sub format_name {
3600: my ($firstname,$middlename,$lastname,$generation,$first)=@_;
3601: my $name;
3602: if ($first ne 'lastname') {
3603: $name=$firstname.' '.$middlename.' '.$lastname.' '.$generation;
3604: } else {
3605: if ($lastname=~/\S/) {
3606: $name.= $lastname.' '.$generation.', '.$firstname.' '.$middlename;
3607: $name=~s/\s+,/,/;
3608: } else {
3609: $name.= $firstname.' '.$middlename.' '.$generation;
3610: }
3611: }
3612: $name=~s/^\s+//;
3613: $name=~s/\s+$//;
3614: $name=~s/\s+/ /g;
3615: return $name;
3616: }
3617:
3618: # ------------------------------------------------- Write to course preferences
3619:
3620: sub writecoursepref {
3621: my ($courseid,%prefs)=@_;
3622: $courseid=~s/^\///;
3623: $courseid=~s/\_/\//g;
3624: my ($cdomain,$cnum)=split(/\//,$courseid);
3625: my $chome=homeserver($cnum,$cdomain);
3626: if (($chome eq '') || ($chome eq 'no_host')) {
3627: return 'error: no such course';
3628: }
3629: my $cstring='';
3630: foreach (keys %prefs) {
3631: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
3632: }
3633: $cstring=~s/\&$//;
3634: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3635: }
3636:
3637: # ---------------------------------------------------------- Make/modify course
3638:
3639: sub createcourse {
3640: my ($udom,$description,$url,$course_server,$nonstandard,$inst_code,$course_owner)=@_;
3641: $url=&declutter($url);
3642: my $cid='';
3643: unless (&allowed('ccc',$udom)) {
3644: return 'refused';
3645: }
3646: # ------------------------------------------------------------------- Create ID
3647: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3648: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3649: # ----------------------------------------------- Make sure that does not exist
3650: my $uhome=&homeserver($uname,$udom,'true');
3651: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3652: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3653: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3654: $uhome=&homeserver($uname,$udom,'true');
3655: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3656: return 'error: unable to generate unique course-ID';
3657: }
3658: }
3659: # ------------------------------------------------ Check supplied server name
3660: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3661: if (! exists($libserv{$course_server})) {
3662: return 'error:bad server name '.$course_server;
3663: }
3664: # ------------------------------------------------------------- Make the course
3665: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
3666: $course_server);
3667: unless ($reply eq 'ok') { return 'error: '.$reply; }
3668: $uhome=&homeserver($uname,$udom,'true');
3669: if (($uhome eq '') || ($uhome eq 'no_host')) {
3670: return 'error: no such course';
3671: }
3672: # ----------------------------------------------------------------- Course made
3673: # log existence
3674: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description).
3675: ':'.&escape($inst_code).':'.&escape($course_owner),$uhome);
3676: &flushcourselogs();
3677: # set toplevel url
3678: my $topurl=$url;
3679: unless ($nonstandard) {
3680: # ------------------------------------------ For standard courses, make top url
3681: my $mapurl=&clutter($url);
3682: if ($mapurl eq '/res/') { $mapurl=''; }
3683: $ENV{'form.initmap'}=(<<ENDINITMAP);
3684: <map>
3685: <resource id="1" type="start"></resource>
3686: <resource id="2" src="$mapurl"></resource>
3687: <resource id="3" type="finish"></resource>
3688: <link index="1" from="1" to="2"></link>
3689: <link index="2" from="2" to="3"></link>
3690: </map>
3691: ENDINITMAP
3692: $topurl=&declutter(
3693: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3694: );
3695: }
3696: # ----------------------------------------------------------- Write preferences
3697: &writecoursepref($udom.'_'.$uname,
3698: ('description' => $description,
3699: 'url' => $topurl));
3700: return '/'.$udom.'/'.$uname;
3701: }
3702:
3703: # ---------------------------------------------------------- Assign Custom Role
3704:
3705: sub assigncustomrole {
3706: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
3707: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
3708: $end,$start,$deleteflag);
3709: }
3710:
3711: # ----------------------------------------------------------------- Revoke Role
3712:
3713: sub revokerole {
3714: my ($udom,$uname,$url,$role,$deleteflag)=@_;
3715: my $now=time;
3716: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
3717: }
3718:
3719: # ---------------------------------------------------------- Revoke Custom Role
3720:
3721: sub revokecustomrole {
3722: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
3723: my $now=time;
3724: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3725: $deleteflag);
3726: }
3727:
3728: # ------------------------------------------------------------ Disk usage
3729: sub diskusage {
3730: my ($udom,$uname,$directoryRoot)=@_;
3731: $directoryRoot =~ s/\/$//;
3732: my $listing=&reply('du:'.$directoryRoot,homeserver($uname,$udom));
3733: return $listing;
3734: }
3735:
3736: sub is_locked {
3737: my ($file_name, $domain, $user) = @_;
3738: my @check;
3739: my $is_locked;
3740: push @check, $file_name;
3741: my %locked = &get('file_permissions',\@check,
3742: $ENV{'user.domain'},$ENV{'user.name'});
3743: my ($tmp)=keys(%locked);
3744: if ($tmp=~/^error:/) { undef(%locked); }
3745:
3746: if (ref($locked{$file_name}) eq 'ARRAY') {
3747: $is_locked = 'true';
3748: } else {
3749: $is_locked = 'false';
3750: }
3751: }
3752:
3753: # ------------------------------------------------------------- Mark as Read Only
3754:
3755: sub mark_as_readonly {
3756: my ($domain,$user,$files,$what) = @_;
3757: my %current_permissions = &dump('file_permissions',$domain,$user);
3758: my ($tmp)=keys(%current_permissions);
3759: if ($tmp=~/^error:/) { undef(%current_permissions); }
3760:
3761: foreach my $file (@{$files}) {
3762: push(@{$current_permissions{$file}},$what);
3763: }
3764: &put('file_permissions',\%current_permissions,$domain,$user);
3765: return;
3766: }
3767:
3768: # ------------------------------------------------------------Save Selected Files
3769:
3770: sub save_selected_files {
3771: my ($user, $path, @files) = @_;
3772: my $filename = $user."savedfiles";
3773: my @other_files = &files_not_in_path($user, $path);
3774: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3775: foreach my $file (@files) {
3776: print (OUT $ENV{'form.currentpath'}.$file."\n");
3777: }
3778: foreach my $file (@other_files) {
3779: print (OUT $file."\n");
3780: }
3781: close (OUT);
3782: return 'ok';
3783: }
3784:
3785: sub clear_selected_files {
3786: my ($user) = @_;
3787: my $filename = $user."savedfiles";
3788: open (OUT, '>'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3789: print (OUT undef);
3790: close (OUT);
3791: return ("ok");
3792: }
3793:
3794: sub files_in_path {
3795: my ($user, $path) = @_;
3796: my $filename = $user."savedfiles";
3797: my %return_files;
3798: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3799: while (my $line_in = <IN>) {
3800: chomp ($line_in);
3801: my @paths_and_file = split (m!/!, $line_in);
3802: my $file_part = pop (@paths_and_file);
3803: my $path_part = join ('/', @paths_and_file);
3804: $path_part.='/';
3805: my $path_and_file = $path_part.$file_part;
3806: if ($path_part eq $path) {
3807: $return_files{$file_part}= 'selected';
3808: }
3809: }
3810: close (IN);
3811: return (\%return_files);
3812: }
3813:
3814: # called in portfolio select mode, to show files selected NOT in current directory
3815: sub files_not_in_path {
3816: my ($user, $path) = @_;
3817: my $filename = $user."savedfiles";
3818: my @return_files;
3819: my $path_part;
3820: open (IN, '<'.$Apache::lonnet::perlvar{'lonDaemons'}.'/tmp/'.$filename);
3821: while (<IN>) {
3822: #ok, I know it's clunky, but I want it to work
3823: my @paths_and_file = split m!/!, $_;
3824: my $file_part = pop (@paths_and_file);
3825: chomp ($file_part);
3826: my $path_part = join ('/', @paths_and_file);
3827: $path_part .= '/';
3828: my $path_and_file = $path_part.$file_part;
3829: if ($path_part ne $path) {
3830: push (@return_files, ($path_and_file));
3831: }
3832: }
3833: close (OUT);
3834: return (@return_files);
3835: }
3836:
3837: #--------------------------------------------------------------Get Marked as Read Only
3838:
3839: sub get_marked_as_readonly {
3840: my ($domain,$user,$what) = @_;
3841: my %current_permissions = &dump('file_permissions',$domain,$user);
3842: my ($tmp)=keys(%current_permissions);
3843: if ($tmp=~/^error:/) { undef(%current_permissions); }
3844:
3845: my @readonly_files;
3846: while (my ($file_name,$value) = each(%current_permissions)) {
3847: if (ref($value) eq "ARRAY"){
3848: foreach my $stored_what (@{$value}) {
3849: if ($stored_what eq $what) {
3850: push(@readonly_files, $file_name);
3851: } elsif (!defined($what)) {
3852: push(@readonly_files, $file_name);
3853: }
3854: }
3855: }
3856: }
3857: return @readonly_files;
3858: }
3859: #-----------------------------------------------------------Get Marked as Read Only Hash
3860:
3861: sub get_marked_as_readonly_hash {
3862: my ($domain,$user,$what) = @_;
3863: my %current_permissions = &dump('file_permissions',$domain,$user);
3864: my ($tmp)=keys(%current_permissions);
3865: if ($tmp=~/^error:/) { undef(%current_permissions); }
3866:
3867: my %readonly_files;
3868: while (my ($file_name,$value) = each(%current_permissions)) {
3869: if (ref($value) eq "ARRAY"){
3870: foreach my $stored_what (@{$value}) {
3871: if ($stored_what eq $what) {
3872: $readonly_files{$file_name} = 'locked';
3873: } elsif (!defined($what)) {
3874: $readonly_files{$file_name} = 'locked';
3875: }
3876: }
3877: }
3878: }
3879: return %readonly_files;
3880: }
3881: # ------------------------------------------------------------ Unmark as Read Only
3882:
3883: sub unmark_as_readonly {
3884: # unmarks all files locked by $what
3885: # for portfolio submissions, $what contains $crsid and $symb
3886: my ($domain,$user,$what) = @_;
3887: my %current_permissions = &dump('file_permissions',$domain,$user);
3888: my ($tmp)=keys(%current_permissions);
3889: if ($tmp=~/^error:/) { undef(%current_permissions); }
3890:
3891: my @readonly_files = &get_marked_as_readonly($domain,$user,$what);
3892: foreach my $file(@readonly_files){
3893: my $current_locks = $current_permissions{$file};
3894: my @new_locks;
3895: my @del_keys;
3896: if (ref($current_locks) eq "ARRAY"){
3897: foreach my $locker (@{$current_locks}) {
3898: unless ($locker eq $what) {
3899: push(@new_locks, $what);
3900: }
3901: }
3902: if (@new_locks > 0) {
3903: $current_permissions{$file} = \@new_locks;
3904: } else {
3905: push(@del_keys, $file);
3906: &del('file_permissions',\@del_keys, $domain, $user);
3907: delete $current_permissions{$file};
3908: }
3909: }
3910: }
3911: &put('file_permissions',\%current_permissions,$domain,$user);
3912: return;
3913: }
3914:
3915: # ------------------------------------------------------------ Directory lister
3916:
3917: sub dirlist {
3918: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3919:
3920: $uri=~s/^\///;
3921: $uri=~s/\/$//;
3922: my ($udom, $uname);
3923: (undef,$udom,$uname)=split(/\//,$uri);
3924: if(defined($userdomain)) {
3925: $udom = $userdomain;
3926: }
3927: if(defined($username)) {
3928: $uname = $username;
3929: }
3930:
3931: my $dirRoot = $perlvar{'lonDocRoot'};
3932: if(defined($alternateDirectoryRoot)) {
3933: $dirRoot = $alternateDirectoryRoot;
3934: $dirRoot =~ s/\/$//;
3935: }
3936:
3937: if($udom) {
3938: if($uname) {
3939: my $listing=reply('ls2:'.$dirRoot.'/'.$uri,
3940: homeserver($uname,$udom));
3941: my @listing_results;
3942: if ($listing eq 'unknown_cmd') {
3943: $listing=reply('ls:'.$dirRoot.'/'.$uri,
3944: homeserver($uname,$udom));
3945: @listing_results = split(/:/,$listing);
3946: } else {
3947: @listing_results = map { &unescape($_); } split(/:/,$listing);
3948: }
3949: return @listing_results;
3950: } elsif(!defined($alternateDirectoryRoot)) {
3951: my $tryserver;
3952: my %allusers=();
3953: foreach $tryserver (keys %libserv) {
3954: if($hostdom{$tryserver} eq $udom) {
3955: my $listing=reply('ls2:'.$perlvar{'lonDocRoot'}.'/res/'.
3956: $udom, $tryserver);
3957: my @listing_results;
3958: if ($listing eq 'unknown_cmd') {
3959: $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3960: $udom, $tryserver);
3961: @listing_results = split(/:/,$listing);
3962: } else {
3963: @listing_results =
3964: map { &unescape($_); } split(/:/,$listing);
3965: }
3966: if ($listing_results[0] ne 'no_such_dir' &&
3967: $listing_results[0] ne 'empty' &&
3968: $listing_results[0] ne 'con_lost') {
3969: foreach (@listing_results) {
3970: my ($entry,@stat)=split(/&/,$_);
3971: $allusers{$entry}=1;
3972: }
3973: }
3974: }
3975: }
3976: my $alluserstr='';
3977: foreach (sort keys %allusers) {
3978: $alluserstr.=$_.'&user:';
3979: }
3980: $alluserstr=~s/:$//;
3981: return split(/:/,$alluserstr);
3982: } else {
3983: my @emptyResults = ();
3984: push(@emptyResults, 'missing user name');
3985: return split(':',@emptyResults);
3986: }
3987: } elsif(!defined($alternateDirectoryRoot)) {
3988: my $tryserver;
3989: my %alldom=();
3990: foreach $tryserver (keys %libserv) {
3991: $alldom{$hostdom{$tryserver}}=1;
3992: }
3993: my $alldomstr='';
3994: foreach (sort keys %alldom) {
3995: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
3996: }
3997: $alldomstr=~s/:$//;
3998: return split(/:/,$alldomstr);
3999: } else {
4000: my @emptyResults = ();
4001: push(@emptyResults, 'missing domain');
4002: return split(':',@emptyResults);
4003: }
4004: }
4005:
4006: # --------------------------------------------- GetFileTimestamp
4007: # This function utilizes dirlist and returns the date stamp for
4008: # when it was last modified. It will also return an error of -1
4009: # if an error occurs
4010:
4011: ##
4012: ## FIXME: This subroutine assumes its caller knows something about the
4013: ## directory structure of the home server for the student ($root).
4014: ## Not a good assumption to make. Since this is for looking up files
4015: ## in user directories, the full path should be constructed by lond, not
4016: ## whatever machine we request data from.
4017: ##
4018: sub GetFileTimestamp {
4019: my ($studentDomain,$studentName,$filename,$root)=@_;
4020: $studentDomain=~s/\W//g;
4021: $studentName=~s/\W//g;
4022: my $subdir=$studentName.'__';
4023: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
4024: my $proname="$studentDomain/$subdir/$studentName";
4025: $proname .= '/'.$filename;
4026: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
4027: $studentName, $root);
4028: my @stats = split('&', $fileStat);
4029: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
4030: # @stats contains first the filename, then the stat output
4031: return $stats[10]; # so this is 10 instead of 9.
4032: } else {
4033: return -1;
4034: }
4035: }
4036:
4037: # -------------------------------------------------------- Value of a Condition
4038:
4039: sub directcondval {
4040: my $number=shift;
4041: if (!defined($ENV{'user.state.'.$ENV{'request.course.id'}})) {
4042: &Apache::lonuserstate::evalstate();
4043: }
4044: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
4045: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
4046: } else {
4047: return 2;
4048: }
4049: }
4050:
4051: sub condval {
4052: my $condidx=shift;
4053: my $result=0;
4054: my $allpathcond='';
4055: foreach (split(/\|/,$condidx)) {
4056: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
4057: $allpathcond.=
4058: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
4059: }
4060: }
4061: $allpathcond=~s/\|$//;
4062: if ($ENV{'request.course.id'}) {
4063: if ($allpathcond) {
4064: my $operand='|';
4065: my @stack;
4066: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
4067: if ($_ eq '(') {
4068: push @stack,($operand,$result)
4069: } elsif ($_ eq ')') {
4070: my $before=pop @stack;
4071: if (pop @stack eq '&') {
4072: $result=$result>$before?$before:$result;
4073: } else {
4074: $result=$result>$before?$result:$before;
4075: }
4076: } elsif (($_ eq '&') || ($_ eq '|')) {
4077: $operand=$_;
4078: } else {
4079: my $new=directcondval($_);
4080: if ($operand eq '&') {
4081: $result=$result>$new?$new:$result;
4082: } else {
4083: $result=$result>$new?$result:$new;
4084: }
4085: }
4086: }
4087: }
4088: }
4089: return $result;
4090: }
4091:
4092: # ---------------------------------------------------- Devalidate courseresdata
4093:
4094: sub devalidatecourseresdata {
4095: my ($coursenum,$coursedomain)=@_;
4096: my $hashid=$coursenum.':'.$coursedomain;
4097: &devalidate_cache_new('courseres',$hashid);
4098: }
4099:
4100: # --------------------------------------------------- Course Resourcedata Query
4101:
4102: sub courseresdata {
4103: my ($coursenum,$coursedomain,@which)=@_;
4104: my $coursehom=&homeserver($coursenum,$coursedomain);
4105: my $hashid=$coursenum.':'.$coursedomain;
4106: my ($result,$cached)=&is_cached_new('courseres',$hashid);
4107: unless (defined($cached)) {
4108: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
4109: $result=\%dumpreply;
4110: my ($tmp) = keys(%dumpreply);
4111: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
4112: &do_cache_new('courseres',$hashid,$result,600);
4113: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4114: return $tmp;
4115: } elsif ($tmp =~ /^(error)/) {
4116: $result=undef;
4117: &do_cache_new('courseres',$hashid,$result,600);
4118: }
4119: }
4120: foreach my $item (@which) {
4121: if (defined($result->{$item})) {
4122: return $result->{$item};
4123: }
4124: }
4125: return undef;
4126: }
4127:
4128: #
4129: # EXT resource caching routines
4130: #
4131:
4132: sub clear_EXT_cache_status {
4133: &delenv('cache.EXT.');
4134: }
4135:
4136: sub EXT_cache_status {
4137: my ($target_domain,$target_user) = @_;
4138: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4139: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
4140: # We know already the user has no data
4141: return 1;
4142: } else {
4143: return 0;
4144: }
4145: }
4146:
4147: sub EXT_cache_set {
4148: my ($target_domain,$target_user) = @_;
4149: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
4150: &appenv($cachename => time);
4151: }
4152:
4153: # --------------------------------------------------------- Value of a Variable
4154: sub EXT {
4155: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
4156:
4157: unless ($varname) { return ''; }
4158: #get real user name/domain, courseid and symb
4159: my $courseid;
4160: my $publicuser;
4161: if ($symbparm) {
4162: $symbparm=&get_symb_from_alias($symbparm);
4163: }
4164: if (!($uname && $udom)) {
4165: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
4166: &Apache::lonxml::whichuser($symbparm);
4167: if (!$symbparm) { $symbparm=$cursymb; }
4168: } else {
4169: $courseid=$ENV{'request.course.id'};
4170: }
4171: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
4172: my $rest;
4173: if (defined($therest[0])) {
4174: $rest=join('.',@therest);
4175: } else {
4176: $rest='';
4177: }
4178:
4179: my $qualifierrest=$qualifier;
4180: if ($rest) { $qualifierrest.='.'.$rest; }
4181: my $spacequalifierrest=$space;
4182: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
4183: if ($realm eq 'user') {
4184: # --------------------------------------------------------------- user.resource
4185: if ($space eq 'resource') {
4186: if (defined($Apache::lonhomework::parsing_a_problem) ||
4187: defined($Apache::lonhomework::parsing_a_task)) {
4188: return $Apache::lonhomework::history{$qualifierrest};
4189: } else {
4190: my %restored;
4191: if ($publicuser || $ENV{'request.state'} eq 'construct') {
4192: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
4193: } else {
4194: %restored=&restore($symbparm,$courseid,$udom,$uname);
4195: }
4196: return $restored{$qualifierrest};
4197: }
4198: # ----------------------------------------------------------------- user.access
4199: } elsif ($space eq 'access') {
4200: # FIXME - not supporting calls for a specific user
4201: return &allowed($qualifier,$rest);
4202: # ------------------------------------------ user.preferences, user.environment
4203: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
4204: if (($uname eq $ENV{'user.name'}) &&
4205: ($udom eq $ENV{'user.domain'})) {
4206: return $ENV{join('.',('environment',$qualifierrest))};
4207: } else {
4208: my %returnhash;
4209: if (!$publicuser) {
4210: %returnhash=&userenvironment($udom,$uname,
4211: $qualifierrest);
4212: }
4213: return $returnhash{$qualifierrest};
4214: }
4215: # ----------------------------------------------------------------- user.course
4216: } elsif ($space eq 'course') {
4217: # FIXME - not supporting calls for a specific user
4218: return $ENV{join('.',('request.course',$qualifier))};
4219: # ------------------------------------------------------------------- user.role
4220: } elsif ($space eq 'role') {
4221: # FIXME - not supporting calls for a specific user
4222: my ($role,$where)=split(/\./,$ENV{'request.role'});
4223: if ($qualifier eq 'value') {
4224: return $role;
4225: } elsif ($qualifier eq 'extent') {
4226: return $where;
4227: }
4228: # ----------------------------------------------------------------- user.domain
4229: } elsif ($space eq 'domain') {
4230: return $udom;
4231: # ------------------------------------------------------------------- user.name
4232: } elsif ($space eq 'name') {
4233: return $uname;
4234: # ---------------------------------------------------- Any other user namespace
4235: } else {
4236: my %reply;
4237: if (!$publicuser) {
4238: %reply=&get($space,[$qualifierrest],$udom,$uname);
4239: }
4240: return $reply{$qualifierrest};
4241: }
4242: } elsif ($realm eq 'query') {
4243: # ---------------------------------------------- pull stuff out of query string
4244: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
4245: [$spacequalifierrest]);
4246: return $ENV{'form.'.$spacequalifierrest};
4247: } elsif ($realm eq 'request') {
4248: # ------------------------------------------------------------- request.browser
4249: if ($space eq 'browser') {
4250: if ($qualifier eq 'textremote') {
4251: if (&mt('textual_remote_display') eq 'on') {
4252: return 1;
4253: } else {
4254: return 0;
4255: }
4256: } else {
4257: return $ENV{'browser.'.$qualifier};
4258: }
4259: # ------------------------------------------------------------ request.filename
4260: } else {
4261: return $ENV{'request.'.$spacequalifierrest};
4262: }
4263: } elsif ($realm eq 'course') {
4264: # ---------------------------------------------------------- course.description
4265: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
4266: } elsif ($realm eq 'resource') {
4267:
4268: my $section;
4269: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
4270: if (!$symbparm) { $symbparm=&symbread(); }
4271: }
4272: my ($courselevelm,$courselevel);
4273: if ($symbparm && defined($courseid) &&
4274: $courseid eq $ENV{'request.course.id'}) {
4275:
4276: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
4277:
4278: # ----------------------------------------------------- Cascading lookup scheme
4279: my $symbp=$symbparm;
4280: my $mapp=(&decode_symb($symbp))[0];
4281:
4282: my $symbparm=$symbp.'.'.$spacequalifierrest;
4283: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
4284:
4285: if (($ENV{'user.name'} eq $uname) &&
4286: ($ENV{'user.domain'} eq $udom)) {
4287: $section=$ENV{'request.course.sec'};
4288: } else {
4289: if (! defined($usection)) {
4290: $section=&getsection($udom,$uname,$courseid);
4291: } else {
4292: $section = $usection;
4293: }
4294: }
4295:
4296: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
4297: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
4298: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
4299:
4300: $courselevel=$courseid.'.'.$spacequalifierrest;
4301: my $courselevelr=$courseid.'.'.$symbparm;
4302: $courselevelm=$courseid.'.'.$mapparm;
4303:
4304: # ----------------------------------------------------------- first, check user
4305: #most student don\'t have any data set, check if there is some data
4306: if (! &EXT_cache_status($udom,$uname)) {
4307: my $hashid="$udom:$uname";
4308: my ($result,$cached)=&is_cached_new('userres',$hashid);
4309: if (!defined($cached)) {
4310: my %resourcedata=&dump('resourcedata',$udom,$uname);
4311: $result=\%resourcedata;
4312: &do_cache_new('userres',$hashid,$result);
4313: }
4314: my ($tmp)=keys(%$result);
4315: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
4316: if ($$result{$courselevelr}) {
4317: return $$result{$courselevelr}; }
4318: if ($$result{$courselevelm}) {
4319: return $$result{$courselevelm}; }
4320: if ($$result{$courselevel}) {
4321: return $$result{$courselevel}; }
4322: } else {
4323: #error 2 occurs when the .db doesn't exist
4324: if ($tmp!~/error: 2 /) {
4325: &logthis("<font color=blue>WARNING:".
4326: " Trying to get resource data for ".
4327: $uname." at ".$udom.": ".
4328: $tmp."</font>");
4329: } elsif ($tmp=~/error: 2 /) {
4330: &EXT_cache_set($udom,$uname);
4331: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
4332: return $tmp;
4333: }
4334: }
4335: }
4336:
4337: # ------------------------------------------------ second, check some of course
4338:
4339: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
4340: $ENV{'course.'.$courseid.'.domain'},
4341: ($seclevelr,$seclevelm,$seclevel,
4342: $courselevelr));
4343: if (defined($coursereply)) { return $coursereply; }
4344:
4345: # ------------------------------------------------------ third, check map parms
4346: my %parmhash=();
4347: my $thisparm='';
4348: if (tie(%parmhash,'GDBM_File',
4349: $ENV{'request.course.fn'}.'_parms.db',
4350: &GDBM_READER(),0640)) {
4351: $thisparm=$parmhash{$symbparm};
4352: untie(%parmhash);
4353: }
4354: if ($thisparm) { return $thisparm; }
4355: }
4356: # ------------------------------------------ fourth, look in resource metadata
4357:
4358: $spacequalifierrest=~s/\./\_/;
4359: my $filename;
4360: if (!$symbparm) { $symbparm=&symbread(); }
4361: if ($symbparm) {
4362: $filename=(&decode_symb($symbparm))[2];
4363: } else {
4364: $filename=$ENV{'request.filename'};
4365: }
4366: my $metadata=&metadata($filename,$spacequalifierrest);
4367: if (defined($metadata)) { return $metadata; }
4368: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
4369: if (defined($metadata)) { return $metadata; }
4370:
4371: # ---------------------------------------------- fourth, look in rest pf course
4372: if ($symbparm && defined($courseid) &&
4373: $courseid eq $ENV{'request.course.id'}) {
4374: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
4375: $ENV{'course.'.$courseid.'.domain'},
4376: ($courselevelm,$courselevel));
4377: if (defined($coursereply)) { return $coursereply; }
4378: }
4379: # ------------------------------------------------------------------ Cascade up
4380: unless ($space eq '0') {
4381: my @parts=split(/_/,$space);
4382: my $id=pop(@parts);
4383: my $part=join('_',@parts);
4384: if ($part eq '') { $part='0'; }
4385: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
4386: $symbparm,$udom,$uname,$section,1);
4387: if (defined($partgeneral)) { return $partgeneral; }
4388: }
4389: if ($recurse) { return undef; }
4390: my $pack_def=&packages_tab_default($filename,$varname);
4391: if (defined($pack_def)) { return $pack_def; }
4392:
4393: # ---------------------------------------------------- Any other user namespace
4394: } elsif ($realm eq 'environment') {
4395: # ----------------------------------------------------------------- environment
4396: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
4397: return $ENV{'environment.'.$spacequalifierrest};
4398: } else {
4399: my %returnhash=&userenvironment($udom,$uname,
4400: $spacequalifierrest);
4401: return $returnhash{$spacequalifierrest};
4402: }
4403: } elsif ($realm eq 'system') {
4404: # ----------------------------------------------------------------- system.time
4405: if ($space eq 'time') {
4406: return time;
4407: }
4408: }
4409: return '';
4410: }
4411:
4412: sub packages_tab_default {
4413: my ($uri,$varname)=@_;
4414: my (undef,$part,$name)=split(/\./,$varname);
4415: my $packages=&metadata($uri,'packages');
4416: foreach my $package (split(/,/,$packages)) {
4417: my ($pack_type,$pack_part)=split(/_/,$package,2);
4418: if (defined($packagetab{"$pack_type&$name&default"})) {
4419: return $packagetab{"$pack_type&$name&default"};
4420: }
4421: if ($pack_type eq 'part') { $pack_part='0'; }
4422: if (defined($packagetab{$pack_type."_".$pack_part."&$name&default"})) {
4423: return $packagetab{$pack_type."_".$pack_part."&$name&default"};
4424: }
4425: }
4426: return undef;
4427: }
4428:
4429: sub add_prefix_and_part {
4430: my ($prefix,$part)=@_;
4431: my $keyroot;
4432: if (defined($prefix) && $prefix !~ /^__/) {
4433: # prefix that has a part already
4434: $keyroot=$prefix;
4435: } elsif (defined($prefix)) {
4436: # prefix that is missing a part
4437: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
4438: } else {
4439: # no prefix at all
4440: if (defined($part)) { $keyroot='_'.$part; }
4441: }
4442: return $keyroot;
4443: }
4444:
4445: # ---------------------------------------------------------------- Get metadata
4446:
4447: my %metaentry;
4448: sub metadata {
4449: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
4450: $uri=&declutter($uri);
4451: # if it is a non metadata possible uri return quickly
4452: if (($uri eq '') ||
4453: (($uri =~ m|^/*adm/|) &&
4454: ($uri !~ m|^adm/includes|) && ($uri !~ m|/bulletinboard$|)) ||
4455: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
4456: ($uri =~ m|home/[^/]+/public_html/|)) {
4457: return undef;
4458: }
4459: my $filename=$uri;
4460: $uri=~s/\.meta$//;
4461: #
4462: # Is the metadata already cached?
4463: # Look at timestamp of caching
4464: # Everything is cached by the main uri, libraries are never directly cached
4465: #
4466: if (!defined($liburi)) {
4467: my ($result,$cached)=&is_cached_new('meta',$uri);
4468: if (defined($cached)) { return $result->{':'.$what}; }
4469: }
4470: {
4471: #
4472: # Is this a recursive call for a library?
4473: #
4474: # if (! exists($metacache{$uri})) {
4475: # $metacache{$uri}={};
4476: # }
4477: if ($liburi) {
4478: $liburi=&declutter($liburi);
4479: $filename=$liburi;
4480: } else {
4481: &devalidate_cache_new('meta',$uri);
4482: undef(%metaentry);
4483: }
4484: my %metathesekeys=();
4485: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
4486: my $metastring;
4487: if ($uri !~ m -^(uploaded|editupload)/-) {
4488: my $file=&filelocation('',&clutter($filename));
4489: #push(@{$metaentry{$uri.'.file'}},$file);
4490: $metastring=&getfile($file);
4491: }
4492: my $parser=HTML::LCParser->new(\$metastring);
4493: my $token;
4494: undef %metathesekeys;
4495: while ($token=$parser->get_token) {
4496: if ($token->[0] eq 'S') {
4497: if (defined($token->[2]->{'package'})) {
4498: #
4499: # This is a package - get package info
4500: #
4501: my $package=$token->[2]->{'package'};
4502: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4503: if (defined($token->[2]->{'id'})) {
4504: $keyroot.='_'.$token->[2]->{'id'};
4505: }
4506: if ($metaentry{':packages'}) {
4507: $metaentry{':packages'}.=','.$package.$keyroot;
4508: } else {
4509: $metaentry{':packages'}=$package.$keyroot;
4510: }
4511: foreach (sort keys %packagetab) {
4512: my $part=$keyroot;
4513: $part=~s/^\_//;
4514: if ($_=~/^\Q$package\E\&/ ||
4515: $_=~/^\Q$package\E_0\&/) {
4516: my ($pack,$name,$subp)=split(/\&/,$_);
4517: # ignore package.tab specified default values
4518: # here &package_tab_default() will fetch those
4519: if ($subp eq 'default') { next; }
4520: my $value=$packagetab{$_};
4521: my $unikey;
4522: if ($pack =~ /_0$/) {
4523: $unikey='parameter_0_'.$name;
4524: $part=0;
4525: } else {
4526: $unikey='parameter'.$keyroot.'_'.$name;
4527: }
4528: if ($subp eq 'display') {
4529: $value.=' [Part: '.$part.']';
4530: }
4531: $metaentry{':'.$unikey.'.part'}=$part;
4532: $metathesekeys{$unikey}=1;
4533: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
4534: $metaentry{':'.$unikey.'.'.$subp}=$value;
4535: }
4536: if (defined($metaentry{':'.$unikey.'.default'})) {
4537: $metaentry{':'.$unikey}=
4538: $metaentry{':'.$unikey.'.default'};
4539: }
4540: }
4541: }
4542: } else {
4543: #
4544: # This is not a package - some other kind of start tag
4545: #
4546: my $entry=$token->[1];
4547: my $unikey;
4548: if ($entry eq 'import') {
4549: $unikey='';
4550: } else {
4551: $unikey=$entry;
4552: }
4553: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
4554:
4555: if (defined($token->[2]->{'id'})) {
4556: $unikey.='_'.$token->[2]->{'id'};
4557: }
4558:
4559: if ($entry eq 'import') {
4560: #
4561: # Importing a library here
4562: #
4563: if ($depthcount<20) {
4564: my $location=$parser->get_text('/import');
4565: my $dir=$filename;
4566: $dir=~s|[^/]*$||;
4567: $location=&filelocation($dir,$location);
4568: foreach (sort(split(/\,/,&metadata($uri,'keys',
4569: $location,$unikey,
4570: $depthcount+1)))) {
4571: $metaentry{':'.$_}=$metaentry{':'.$_};
4572: $metathesekeys{$_}=1;
4573: }
4574: }
4575: } else {
4576:
4577: if (defined($token->[2]->{'name'})) {
4578: $unikey.='_'.$token->[2]->{'name'};
4579: }
4580: $metathesekeys{$unikey}=1;
4581: foreach (@{$token->[3]}) {
4582: $metaentry{':'.$unikey.'.'.$_}=$token->[2]->{$_};
4583: }
4584: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
4585: my $default=$metaentry{':'.$unikey.'.default'};
4586: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
4587: # only ws inside the tag, and not in default, so use default
4588: # as value
4589: $metaentry{':'.$unikey}=$default;
4590: } else {
4591: # either something interesting inside the tag or default
4592: # uninteresting
4593: $metaentry{':'.$unikey}=$internaltext;
4594: }
4595: # end of not-a-package not-a-library import
4596: }
4597: # end of not-a-package start tag
4598: }
4599: # the next is the end of "start tag"
4600: }
4601: }
4602: my ($extension) = ($uri =~ /\.(\w+)$/);
4603: foreach my $key (sort(keys(%packagetab))) {
4604: #&logthis("extsion1 $extension $key !!");
4605: #no specific packages #how's our extension
4606: if ($key!~/^extension_\Q$extension\E&/) { next; }
4607: &metadata_create_package_def($uri,$key,'extension_'.$extension,
4608: \%metathesekeys);
4609: }
4610: if (!exists($metaentry{':packages'})) {
4611: foreach my $key (sort(keys(%packagetab))) {
4612: #no specific packages well let's get default then
4613: if ($key!~/^default&/) { next; }
4614: &metadata_create_package_def($uri,$key,'default',
4615: \%metathesekeys);
4616: }
4617: }
4618: # are there custom rights to evaluate
4619: if ($metaentry{':copyright'} eq 'custom') {
4620:
4621: #
4622: # Importing a rights file here
4623: #
4624: unless ($depthcount) {
4625: my $location=$metaentry{':customdistributionfile'};
4626: my $dir=$filename;
4627: $dir=~s|[^/]*$||;
4628: $location=&filelocation($dir,$location);
4629: foreach (sort(split(/\,/,&metadata($uri,'keys',
4630: $location,'_rights',
4631: $depthcount+1)))) {
4632: #$metaentry{':'.$_}=$metacache{$uri}->{':'.$_};
4633: $metathesekeys{$_}=1;
4634: }
4635: }
4636: }
4637: $metaentry{':keys'}=join(',',keys %metathesekeys);
4638: &metadata_generate_part0(\%metathesekeys,\%metaentry,$uri);
4639: $metaentry{':allpossiblekeys'}=join(',',keys %metathesekeys);
4640: &do_cache_new('meta',$uri,\%metaentry);
4641: # this is the end of "was not already recently cached
4642: }
4643: return $metaentry{':'.$what};
4644: }
4645:
4646: sub metadata_create_package_def {
4647: my ($uri,$key,$package,$metathesekeys)=@_;
4648: my ($pack,$name,$subp)=split(/\&/,$key);
4649: if ($subp eq 'default') { next; }
4650:
4651: if (defined($metaentry{':packages'})) {
4652: $metaentry{':packages'}.=','.$package;
4653: } else {
4654: $metaentry{':packages'}=$package;
4655: }
4656: my $value=$packagetab{$key};
4657: my $unikey;
4658: $unikey='parameter_0_'.$name;
4659: $metaentry{':'.$unikey.'.part'}=0;
4660: $$metathesekeys{$unikey}=1;
4661: unless (defined($metaentry{':'.$unikey.'.'.$subp})) {
4662: $metaentry{':'.$unikey.'.'.$subp}=$value;
4663: }
4664: if (defined($metaentry{':'.$unikey.'.default'})) {
4665: $metaentry{':'.$unikey}=
4666: $metaentry{':'.$unikey.'.default'};
4667: }
4668: }
4669:
4670: sub metadata_generate_part0 {
4671: my ($metadata,$metacache,$uri) = @_;
4672: my %allnames;
4673: foreach my $metakey (sort keys %$metadata) {
4674: if ($metakey=~/^parameter\_(.*)/) {
4675: my $part=$$metacache{':'.$metakey.'.part'};
4676: my $name=$$metacache{':'.$metakey.'.name'};
4677: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
4678: $allnames{$name}=$part;
4679: }
4680: }
4681: }
4682: foreach my $name (keys(%allnames)) {
4683: $$metadata{"parameter_0_$name"}=1;
4684: my $key=":parameter_0_$name";
4685: $$metacache{"$key.part"}='0';
4686: $$metacache{"$key.name"}=$name;
4687: $$metacache{"$key.type"}=$$metacache{':parameter_'.
4688: $allnames{$name}.'_'.$name.
4689: '.type'};
4690: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
4691: '.display'};
4692: my $expr='\\[Part: '.$allnames{$name}.'\\]';
4693: $olddis=~s/\Q$expr\E/\[Part: 0\]/;
4694: $$metacache{"$key.display"}=$olddis;
4695: }
4696: }
4697:
4698: # ------------------------------------------------- Get the title of a resource
4699:
4700: sub gettitle {
4701: my $urlsymb=shift;
4702: my $symb=&symbread($urlsymb);
4703: if ($symb) {
4704: my $key=$ENV{'request.course.id'}."\0".$symb;
4705: my ($result,$cached)=&is_cached_new('title',$key);
4706: if (defined($cached)) {
4707: return $result;
4708: }
4709: my ($map,$resid,$url)=&decode_symb($symb);
4710: my $title='';
4711: my %bighash;
4712: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4713: &GDBM_READER(),0640)) {
4714: my $mapid=$bighash{'map_pc_'.&clutter($map)};
4715: $title=$bighash{'title_'.$mapid.'.'.$resid};
4716: untie %bighash;
4717: }
4718: $title=~s/\&colon\;/\:/gs;
4719: if ($title) {
4720: return &do_cache_new('title',$key,$title,600);
4721: }
4722: $urlsymb=$url;
4723: }
4724: my $title=&metadata($urlsymb,'title');
4725: if (!$title) { $title=(split('/',$urlsymb))[-1]; }
4726: return $title;
4727: }
4728:
4729: sub get_slot {
4730: my ($which,$cnum,$cdom)=@_;
4731: if (!$cnum || !$cdom) {
4732: (undef,my $courseid)=&Apache::lonxml::whichuser();
4733: $cdom=$ENV{'course.'.$courseid.'.domain'};
4734: $cnum=$ENV{'course.'.$courseid.'.num'};
4735: }
4736: my %slotinfo=&get('slots',[$which],$cdom,$cnum);
4737: &Apache::lonhomework::showhash(%slotinfo);
4738: my ($tmp)=keys(%slotinfo);
4739: if ($tmp=~/^error:/) { return (); }
4740: if (ref($slotinfo{$which}) eq 'HASH') {
4741: return %{$slotinfo{$which}};
4742: }
4743: return $slotinfo{$which};
4744: }
4745: # ------------------------------------------------- Update symbolic store links
4746:
4747: sub symblist {
4748: my ($mapname,%newhash)=@_;
4749: $mapname=&deversion(&declutter($mapname));
4750: my %hash;
4751: if (($ENV{'request.course.fn'}) && (%newhash)) {
4752: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4753: &GDBM_WRCREAT(),0640)) {
4754: foreach (keys %newhash) {
4755: $hash{declutter($_)}=&encode_symb($mapname,$newhash{$_}->[1],
4756: $newhash{$_}->[0]);
4757: }
4758: if (untie(%hash)) {
4759: return 'ok';
4760: }
4761: }
4762: }
4763: return 'error';
4764: }
4765:
4766: # --------------------------------------------------------------- Verify a symb
4767:
4768: sub symbverify {
4769: my ($symb,$thisurl)=@_;
4770: my $thisfn=$thisurl;
4771: # wrapper not part of symbs
4772: $thisfn=~s/^\/adm\/wrapper//;
4773: $thisfn=&declutter($thisfn);
4774: # direct jump to resource in page or to a sequence - will construct own symbs
4775: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4776: # check URL part
4777: my ($map,$resid,$url)=&decode_symb($symb);
4778:
4779: unless ($url eq $thisfn) { return 0; }
4780:
4781: $symb=&symbclean($symb);
4782: $thisurl=&deversion($thisurl);
4783: $thisfn=&deversion($thisfn);
4784:
4785: my %bighash;
4786: my $okay=0;
4787:
4788: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4789: &GDBM_READER(),0640)) {
4790: my $ids=$bighash{'ids_'.&clutter($thisurl)};
4791: unless ($ids) {
4792: $ids=$bighash{'ids_/'.$thisurl};
4793: }
4794: if ($ids) {
4795: # ------------------------------------------------------------------- Has ID(s)
4796: foreach (split(/\,/,$ids)) {
4797: my ($mapid,$resid)=split(/\./,$_);
4798: if (
4799: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4800: eq $symb) {
4801: if (($ENV{'request.role.adv'}) ||
4802: $bighash{'encrypted_'.$_} eq $ENV{'request.enc'}) {
4803: $okay=1;
4804: }
4805: }
4806: }
4807: }
4808: untie(%bighash);
4809: }
4810: return $okay;
4811: }
4812:
4813: # --------------------------------------------------------------- Clean-up symb
4814:
4815: sub symbclean {
4816: my $symb=shift;
4817: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
4818: # remove version from map
4819: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
4820:
4821: # remove version from URL
4822: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
4823:
4824: # remove wrapper
4825:
4826: $symb=~s/(\_\_\_\d+\_\_\_)adm\/wrapper\/(res\/)*/$1/;
4827: return $symb;
4828: }
4829:
4830: # ---------------------------------------------- Split symb to find map and url
4831:
4832: sub encode_symb {
4833: my ($map,$resid,$url)=@_;
4834: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4835: }
4836:
4837: sub decode_symb {
4838: my $symb=shift;
4839: if ($symb=~m|^/enc/|) { $symb=&Apache::lonenc::unencrypted($symb); }
4840: my ($map,$resid,$url)=split(/___/,$symb);
4841: return (&fixversion($map),$resid,&fixversion($url));
4842: }
4843:
4844: sub fixversion {
4845: my $fn=shift;
4846: if ($fn=~/^(adm|uploaded|editupload|public)/) { return $fn; }
4847: my %bighash;
4848: my $uri=&clutter($fn);
4849: my $key=$ENV{'request.course.id'}.'_'.$uri;
4850: # is this cached?
4851: my ($result,$cached)=&is_cached_new('courseresversion',$key);
4852: if (defined($cached)) { return $result; }
4853: # unfortunately not cached, or expired
4854: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4855: &GDBM_READER(),0640)) {
4856: if ($bighash{'version_'.$uri}) {
4857: my $version=$bighash{'version_'.$uri};
4858: unless (($version eq 'mostrecent') ||
4859: ($version==&getversion($uri))) {
4860: $uri=~s/\.(\w+)$/\.$version\.$1/;
4861: }
4862: }
4863: untie %bighash;
4864: }
4865: return &do_cache_new('courseresversion',$key,&declutter($uri),600);
4866: }
4867:
4868: sub deversion {
4869: my $url=shift;
4870: $url=~s/\.\d+\.(\w+)$/\.$1/;
4871: return $url;
4872: }
4873:
4874: # ------------------------------------------------------ Return symb list entry
4875:
4876: sub symbread {
4877: my ($thisfn,$donotrecurse)=@_;
4878: my $cache_str='request.symbread.cached.'.$thisfn;
4879: if (defined($ENV{$cache_str})) { return $ENV{$cache_str}; }
4880: # no filename provided? try from environment
4881: unless ($thisfn) {
4882: if ($ENV{'request.symb'}) {
4883: return $ENV{$cache_str}=&symbclean($ENV{'request.symb'});
4884: }
4885: $thisfn=$ENV{'request.filename'};
4886: }
4887: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
4888: # is that filename actually a symb? Verify, clean, and return
4889: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4890: if (&symbverify($thisfn,$1)) {
4891: return $ENV{$cache_str}=&symbclean($thisfn);
4892: }
4893: }
4894: $thisfn=declutter($thisfn);
4895: my %hash;
4896: my %bighash;
4897: my $syval='';
4898: if (($ENV{'request.course.fn'}) && ($thisfn)) {
4899: my $targetfn = $thisfn;
4900: if ( ($thisfn =~ m/^(uploaded|editupload)\//) && ($thisfn !~ m/\.(page|sequence)$/) ) {
4901: $targetfn = 'adm/wrapper/'.$thisfn;
4902: }
4903: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
4904: &GDBM_READER(),0640)) {
4905: $syval=$hash{$targetfn};
4906: untie(%hash);
4907: }
4908: # ---------------------------------------------------------- There was an entry
4909: if ($syval) {
4910: #unless ($syval=~/\_\d+$/) {
4911: #unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
4912: #&appenv('request.ambiguous' => $thisfn);
4913: #return $ENV{$cache_str}='';
4914: #}
4915: #$syval.=$1;
4916: #}
4917: } else {
4918: # ------------------------------------------------------- Was not in symb table
4919: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
4920: &GDBM_READER(),0640)) {
4921: # ---------------------------------------------- Get ID(s) for current resource
4922: my $ids=$bighash{'ids_'.&clutter($thisfn)};
4923: unless ($ids) {
4924: $ids=$bighash{'ids_/'.$thisfn};
4925: }
4926: unless ($ids) {
4927: # alias?
4928: $ids=$bighash{'mapalias_'.$thisfn};
4929: }
4930: if ($ids) {
4931: # ------------------------------------------------------------------- Has ID(s)
4932: my @possibilities=split(/\,/,$ids);
4933: if ($#possibilities==0) {
4934: # ----------------------------------------------- There is only one possibility
4935: my ($mapid,$resid)=split(/\./,$ids);
4936: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
4937: } elsif (!$donotrecurse) {
4938: # ------------------------------------------ There is more than one possibility
4939: my $realpossible=0;
4940: foreach (@possibilities) {
4941: my $file=$bighash{'src_'.$_};
4942: if (&allowed('bre',$file)) {
4943: my ($mapid,$resid)=split(/\./,$_);
4944: if ($bighash{'map_type_'.$mapid} ne 'page') {
4945: $realpossible++;
4946: $syval=declutter($bighash{'map_id_'.$mapid}).
4947: '___'.$resid;
4948: }
4949: }
4950: }
4951: if ($realpossible!=1) { $syval=''; }
4952: } else {
4953: $syval='';
4954: }
4955: }
4956: untie(%bighash)
4957: }
4958: }
4959: if ($syval) {
4960: return $ENV{$cache_str}=$syval;
4961: #return $ENV{$cache_str}=&symbclean($syval.'___'.$thisfn);
4962: }
4963: }
4964: &appenv('request.ambiguous' => $thisfn);
4965: return $ENV{$cache_str}='';
4966: }
4967:
4968: # ---------------------------------------------------------- Return random seed
4969:
4970: sub numval {
4971: my $txt=shift;
4972: $txt=~tr/A-J/0-9/;
4973: $txt=~tr/a-j/0-9/;
4974: $txt=~tr/K-T/0-9/;
4975: $txt=~tr/k-t/0-9/;
4976: $txt=~tr/U-Z/0-5/;
4977: $txt=~tr/u-z/0-5/;
4978: $txt=~s/\D//g;
4979: if ($_64bit) { if ($txt > 2**32) { return -1; } }
4980: return int($txt);
4981: }
4982:
4983: sub numval2 {
4984: my $txt=shift;
4985: $txt=~tr/A-J/0-9/;
4986: $txt=~tr/a-j/0-9/;
4987: $txt=~tr/K-T/0-9/;
4988: $txt=~tr/k-t/0-9/;
4989: $txt=~tr/U-Z/0-5/;
4990: $txt=~tr/u-z/0-5/;
4991: $txt=~s/\D//g;
4992: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
4993: my $total;
4994: foreach my $val (@txts) { $total+=$val; }
4995: if ($_64bit) { if ($total > 2**32) { return -1; } }
4996: return int($total);
4997: }
4998:
4999: sub numval3 {
5000: use integer;
5001: my $txt=shift;
5002: $txt=~tr/A-J/0-9/;
5003: $txt=~tr/a-j/0-9/;
5004: $txt=~tr/K-T/0-9/;
5005: $txt=~tr/k-t/0-9/;
5006: $txt=~tr/U-Z/0-5/;
5007: $txt=~tr/u-z/0-5/;
5008: $txt=~s/\D//g;
5009: my @txts=split(/(\d\d\d\d\d\d\d\d\d)/,$txt);
5010: my $total;
5011: foreach my $val (@txts) { $total+=$val; }
5012: if ($_64bit) { $total=(($total<<32)>>32); }
5013: return $total;
5014: }
5015:
5016: sub latest_rnd_algorithm_id {
5017: return '64bit4';
5018: }
5019:
5020: sub get_rand_alg {
5021: my ($courseid)=@_;
5022: if (!$courseid) { $courseid=(&Apache::lonxml::whichuser())[1]; }
5023: if ($courseid) {
5024: return $ENV{"course.$courseid.rndseed"};
5025: }
5026: return &latest_rnd_algorithm_id();
5027: }
5028:
5029: sub validCODE {
5030: my ($CODE)=@_;
5031: if (defined($CODE) && $CODE ne '' && $CODE =~ /^\w+$/) { return 1; }
5032: return 0;
5033: }
5034:
5035: sub getCODE {
5036: if (&validCODE($ENV{'form.CODE'})) { return $ENV{'form.CODE'}; }
5037: if ( (defined($Apache::lonhomework::parsing_a_problem) ||
5038: defined($Apache::lonhomework::parsing_a_task) ) &&
5039: &validCODE($Apache::lonhomework::history{'resource.CODE'})) {
5040: return $Apache::lonhomework::history{'resource.CODE'};
5041: }
5042: return undef;
5043: }
5044:
5045: sub rndseed {
5046: my ($symb,$courseid,$domain,$username)=@_;
5047:
5048: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
5049: if (!$symb) {
5050: unless ($symb=$wsymb) { return time; }
5051: }
5052: if (!$courseid) { $courseid=$wcourseid; }
5053: if (!$domain) { $domain=$wdomain; }
5054: if (!$username) { $username=$wusername }
5055: my $which=&get_rand_alg();
5056: if (defined(&getCODE())) {
5057: if ($which eq '64bit4') {
5058: return &rndseed_CODE_64bit4($symb,$courseid,$domain,$username);
5059: } else {
5060: return &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
5061: }
5062: } elsif ($which eq '64bit4') {
5063: return &rndseed_64bit4($symb,$courseid,$domain,$username);
5064: } elsif ($which eq '64bit3') {
5065: return &rndseed_64bit3($symb,$courseid,$domain,$username);
5066: } elsif ($which eq '64bit2') {
5067: return &rndseed_64bit2($symb,$courseid,$domain,$username);
5068: } elsif ($which eq '64bit') {
5069: return &rndseed_64bit($symb,$courseid,$domain,$username);
5070: }
5071: return &rndseed_32bit($symb,$courseid,$domain,$username);
5072: }
5073:
5074: sub rndseed_32bit {
5075: my ($symb,$courseid,$domain,$username)=@_;
5076: {
5077: use integer;
5078: my $symbchck=unpack("%32C*",$symb) << 27;
5079: my $symbseed=numval($symb) << 22;
5080: my $namechck=unpack("%32C*",$username) << 17;
5081: my $nameseed=numval($username) << 12;
5082: my $domainseed=unpack("%32C*",$domain) << 7;
5083: my $courseseed=unpack("%32C*",$courseid);
5084: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
5085: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5086: #&Apache::lonxml::debug("rndseed :$num:$symb");
5087: if ($_64bit) { $num=(($num<<32)>>32); }
5088: return $num;
5089: }
5090: }
5091:
5092: sub rndseed_64bit {
5093: my ($symb,$courseid,$domain,$username)=@_;
5094: {
5095: use integer;
5096: my $symbchck=unpack("%32S*",$symb) << 21;
5097: my $symbseed=numval($symb) << 10;
5098: my $namechck=unpack("%32S*",$username);
5099:
5100: my $nameseed=numval($username) << 21;
5101: my $domainseed=unpack("%32S*",$domain) << 10;
5102: my $courseseed=unpack("%32S*",$courseid);
5103:
5104: my $num1=$symbchck+$symbseed+$namechck;
5105: my $num2=$nameseed+$domainseed+$courseseed;
5106: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5107: #&Apache::lonxml::debug("rndseed :$num:$symb");
5108: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5109: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5110: return "$num1,$num2";
5111: }
5112: }
5113:
5114: sub rndseed_64bit2 {
5115: my ($symb,$courseid,$domain,$username)=@_;
5116: {
5117: use integer;
5118: # strings need to be an even # of cahracters long, it it is odd the
5119: # last characters gets thrown away
5120: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5121: my $symbseed=numval($symb) << 10;
5122: my $namechck=unpack("%32S*",$username.' ');
5123:
5124: my $nameseed=numval($username) << 21;
5125: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5126: my $courseseed=unpack("%32S*",$courseid.' ');
5127:
5128: my $num1=$symbchck+$symbseed+$namechck;
5129: my $num2=$nameseed+$domainseed+$courseseed;
5130: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5131: #&Apache::lonxml::debug("rndseed :$num:$symb");
5132: return "$num1,$num2";
5133: }
5134: }
5135:
5136: sub rndseed_64bit3 {
5137: my ($symb,$courseid,$domain,$username)=@_;
5138: {
5139: use integer;
5140: # strings need to be an even # of cahracters long, it it is odd the
5141: # last characters gets thrown away
5142: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5143: my $symbseed=numval2($symb) << 10;
5144: my $namechck=unpack("%32S*",$username.' ');
5145:
5146: my $nameseed=numval2($username) << 21;
5147: my $domainseed=unpack("%32S*",$domain.' ') << 10;
5148: my $courseseed=unpack("%32S*",$courseid.' ');
5149:
5150: my $num1=$symbchck+$symbseed+$namechck;
5151: my $num2=$nameseed+$domainseed+$courseseed;
5152: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
5153: #&Apache::lonxml::debug("rndseed :$num1:$num2:$_64bit");
5154: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5155:
5156: return "$num1:$num2";
5157: }
5158: }
5159:
5160: sub rndseed_64bit4 {
5161: my ($symb,$courseid,$domain,$username)=@_;
5162: {
5163: use integer;
5164: # strings need to be an even # of cahracters long, it it is odd the
5165: # last characters gets thrown away
5166: my $symbchck=unpack("%32S*",$symb.' ') << 21;
5167: my $symbseed=numval3($symb) << 10;
5168: my $namechck=unpack("%32S*",$username.' ');
5169:
5170: my $nameseed=numval3($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 :$num1:$num2:$_64bit");
5178: if ($_64bit) { $num1=(($num1<<32)>>32); $num2=(($num2<<32)>>32); }
5179:
5180: return "$num1:$num2";
5181: }
5182: }
5183:
5184: sub rndseed_CODE_64bit {
5185: my ($symb,$courseid,$domain,$username)=@_;
5186: {
5187: use integer;
5188: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5189: my $symbseed=numval2($symb);
5190: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5191: my $CODEseed=numval(&getCODE());
5192: my $courseseed=unpack("%32S*",$courseid.' ');
5193: my $num1=$symbseed+$CODEchck;
5194: my $num2=$CODEseed+$courseseed+$symbchck;
5195: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5196: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5197: if ($_64bit) { $num1=(($num1<<32)>>32); }
5198: if ($_64bit) { $num2=(($num2<<32)>>32); }
5199: return "$num1:$num2";
5200: }
5201: }
5202:
5203: sub rndseed_CODE_64bit4 {
5204: my ($symb,$courseid,$domain,$username)=@_;
5205: {
5206: use integer;
5207: my $symbchck=unpack("%32S*",$symb.' ') << 16;
5208: my $symbseed=numval3($symb);
5209: my $CODEchck=unpack("%32S*",&getCODE().' ') << 16;
5210: my $CODEseed=numval3(&getCODE());
5211: my $courseseed=unpack("%32S*",$courseid.' ');
5212: my $num1=$symbseed+$CODEchck;
5213: my $num2=$CODEseed+$courseseed+$symbchck;
5214: #&Apache::lonxml::debug("$symbseed:$CODEchck|$CODEseed:$courseseed:$symbchck");
5215: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
5216: if ($_64bit) { $num1=(($num1<<32)>>32); }
5217: if ($_64bit) { $num2=(($num2<<32)>>32); }
5218: return "$num1:$num2";
5219: }
5220: }
5221:
5222: sub setup_random_from_rndseed {
5223: my ($rndseed)=@_;
5224: if ($rndseed =~/([,:])/) {
5225: my ($num1,$num2)=split(/[,:]/,$rndseed);
5226: &Math::Random::random_set_seed(abs($num1),abs($num2));
5227: } else {
5228: &Math::Random::random_set_seed_from_phrase($rndseed);
5229: }
5230: }
5231:
5232: sub latest_receipt_algorithm_id {
5233: return 'receipt2';
5234: }
5235:
5236: sub recunique {
5237: my $fucourseid=shift;
5238: my $unique;
5239: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5240: $unique=$ENV{"course.$fucourseid.internal.encseed"};
5241: } else {
5242: $unique=$perlvar{'lonReceipt'};
5243: }
5244: return unpack("%32C*",$unique);
5245: }
5246:
5247: sub recprefix {
5248: my $fucourseid=shift;
5249: my $prefix;
5250: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2') {
5251: $prefix=$ENV{"course.$fucourseid.internal.encpref"};
5252: } else {
5253: $prefix=$perlvar{'lonHostID'};
5254: }
5255: return unpack("%32C*",$prefix);
5256: }
5257:
5258: sub ireceipt {
5259: my ($funame,$fudom,$fucourseid,$fusymb,$part)=@_;
5260: my $cuname=unpack("%32C*",$funame);
5261: my $cudom=unpack("%32C*",$fudom);
5262: my $cucourseid=unpack("%32C*",$fucourseid);
5263: my $cusymb=unpack("%32C*",$fusymb);
5264: my $cunique=&recunique($fucourseid);
5265: my $cpart=unpack("%32S*",$part);
5266: my $return =&recprefix($fucourseid).'-';
5267: if ($ENV{"course.$fucourseid.receiptalg"} eq 'receipt2' ||
5268: $ENV{'request.state'} eq 'construct') {
5269: &Apache::lonxml::debug("doing receipt2 using parts $cpart, uname $cuname and udom $cudom gets ".($cpart%$cuname).
5270: " and ".($cpart%$cudom));
5271:
5272: $return.= ($cunique%$cuname+
5273: $cunique%$cudom+
5274: $cusymb%$cuname+
5275: $cusymb%$cudom+
5276: $cucourseid%$cuname+
5277: $cucourseid%$cudom+
5278: $cpart%$cuname+
5279: $cpart%$cudom);
5280: } else {
5281: $return.= ($cunique%$cuname+
5282: $cunique%$cudom+
5283: $cusymb%$cuname+
5284: $cusymb%$cudom+
5285: $cucourseid%$cuname+
5286: $cucourseid%$cudom);
5287: }
5288: return $return;
5289: }
5290:
5291: sub receipt {
5292: my ($part)=@_;
5293: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
5294: return &ireceipt($name,$domain,$courseid,$symb,$part);
5295: }
5296:
5297: # ------------------------------------------------------------ Serves up a file
5298: # returns either the contents of the file or
5299: # -1 if the file doesn't exist
5300: #
5301: # if the target is a file that was uploaded via DOCS,
5302: # a check will be made to see if a current copy exists on the local server,
5303: # if it does this will be served, otherwise a copy will be retrieved from
5304: # the home server for the course and stored in /home/httpd/html/userfiles on
5305: # the local server.
5306:
5307: sub getfile {
5308: my ($file) = @_;
5309: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5310: &repcopy($file);
5311: return &readfile($file);
5312: }
5313:
5314: sub repcopy_userfile {
5315: my ($file)=@_;
5316: if ($file =~ m -^/*(uploaded|editupload)/-) { $file=&filelocation("",$file); }
5317: if ($file =~ m|^/home/httpd/html/lonUsers/|) { return 'ok'; }
5318: my ($cdom,$cnum,$filename) =
5319: ($file=~m|^\Q$perlvar{'lonDocRoot'}\E/+userfiles/+([^/]+)/+([^/]+)/+(.*)|);
5320: my ($info,$rtncode);
5321: my $uri="/uploaded/$cdom/$cnum/$filename";
5322: if (-e "$file") {
5323: my @fileinfo = stat($file);
5324: my $lwpresp = &getuploaded('HEAD',$uri,$cdom,$cnum,\$info,\$rtncode);
5325: if ($lwpresp ne 'ok') {
5326: if ($rtncode eq '404') {
5327: unlink($file);
5328: }
5329: #my $ua=new LWP::UserAgent;
5330: #my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5331: #my $response=$ua->request($request);
5332: #if ($response->is_success()) {
5333: # return $response->content;
5334: # } else {
5335: # return -1;
5336: # }
5337: return -1;
5338: }
5339: if ($info < $fileinfo[9]) {
5340: return 'ok';
5341: }
5342: $info = '';
5343: $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5344: if ($lwpresp ne 'ok') {
5345: return -1;
5346: }
5347: } else {
5348: my $lwpresp = &getuploaded('GET',$uri,$cdom,$cnum,\$info,\$rtncode);
5349: if ($lwpresp ne 'ok') {
5350: my $ua=new LWP::UserAgent;
5351: my $request=new HTTP::Request('GET',&tokenwrapper($uri));
5352: my $response=$ua->request($request);
5353: if ($response->is_success()) {
5354: $info=$response->content;
5355: } else {
5356: return -1;
5357: }
5358: }
5359: my @parts = ($cdom,$cnum);
5360: if ($filename =~ m|^(.+)/[^/]+$|) {
5361: push @parts, split(/\//,$1);
5362: }
5363: my $path = $perlvar{'lonDocRoot'}.'/userfiles';
5364: foreach my $part (@parts) {
5365: $path .= '/'.$part;
5366: if (!-e $path) {
5367: mkdir($path,0770);
5368: }
5369: }
5370: }
5371: open(FILE,">$file");
5372: print FILE $info;
5373: close(FILE);
5374: return 'ok';
5375: }
5376:
5377: sub tokenwrapper {
5378: my $uri=shift;
5379: $uri=~s|^http\://([^/]+)||;
5380: $uri=~s|^/||;
5381: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
5382: my $token=$1;
5383: my (undef,$udom,$uname,$file)=split('/',$uri,4);
5384: if ($udom && $uname && $file) {
5385: $file=~s|(\?\.*)*$||;
5386: &appenv("userfile.$udom/$uname/$file" => $ENV{'request.course.id'});
5387: return 'http://'.$hostname{ &homeserver($uname,$udom)}.'/'.$uri.
5388: (($uri=~/\?/)?'&':'?').'token='.$token.
5389: '&tokenissued='.$perlvar{'lonHostID'};
5390: } else {
5391: return '/adm/notfound.html';
5392: }
5393: }
5394:
5395: sub getuploaded {
5396: my ($reqtype,$uri,$cdom,$cnum,$info,$rtncode) = @_;
5397: $uri=~s/^\///;
5398: $uri = 'http://'.$hostname{ &homeserver($cnum,$cdom)}.'/raw/'.$uri;
5399: my $ua=new LWP::UserAgent;
5400: my $request=new HTTP::Request($reqtype,$uri);
5401: my $response=$ua->request($request);
5402: $$rtncode = $response->code;
5403: if (! $response->is_success()) {
5404: return 'failed';
5405: }
5406: if ($reqtype eq 'HEAD') {
5407: $$info = &HTTP::Date::str2time( $response->header('Last-modified') );
5408: } elsif ($reqtype eq 'GET') {
5409: $$info = $response->content;
5410: }
5411: return 'ok';
5412: }
5413:
5414: sub readfile {
5415: my $file = shift;
5416: if ( (! -e $file ) || ($file eq '') ) { return -1; };
5417: my $fh;
5418: open($fh,"<$file");
5419: my $a='';
5420: while (<$fh>) { $a .=$_; }
5421: return $a;
5422: }
5423:
5424: sub filelocation {
5425: my ($dir,$file) = @_;
5426: my $location;
5427: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
5428: if ($file=~m:^/~:) { # is a contruction space reference
5429: $location = $file;
5430: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
5431: } elsif ($file=~/^\/*(uploaded|editupload)/) { # is an uploaded file
5432: my ($udom,$uname,$filename)=
5433: ($file=~m -^/+(?:uploaded|editupload)/+([^/]+)/+([^/]+)/+(.*)$-);
5434: my $home=&homeserver($uname,$udom);
5435: my $is_me=0;
5436: my @ids=¤t_machine_ids();
5437: foreach my $id (@ids) { if ($id eq $home) { $is_me=1; } }
5438: if ($is_me) {
5439: $location=&Apache::loncommon::propath($udom,$uname).
5440: '/userfiles/'.$filename;
5441: } else {
5442: $location=$Apache::lonnet::perlvar{'lonDocRoot'}.'/userfiles/'.
5443: $udom.'/'.$uname.'/'.$filename;
5444: }
5445: } else {
5446: $file=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5447: $file=~s:^/res/:/:;
5448: if ( !( $file =~ m:^/:) ) {
5449: $location = $dir. '/'.$file;
5450: } else {
5451: $location = '/home/httpd/html/res'.$file;
5452: }
5453: }
5454: $location=~s://+:/:g; # remove duplicate /
5455: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
5456: while ($location=~m:/\./:) {$location=~ s:/\./:/:g;} #remove /./
5457: return $location;
5458: }
5459:
5460: sub hreflocation {
5461: my ($dir,$file)=@_;
5462: unless (($file=~m-^http://-i) || ($file=~m-^/-)) {
5463: my $finalpath=filelocation($dir,$file);
5464: $finalpath=~s-^/home/httpd/html--;
5465: $finalpath=~s-^/home/(\w+)/public_html/-/~$1/-;
5466: return $finalpath;
5467: } elsif ($file=~m-^/home-) {
5468: $file=~s-^/home/httpd/html--;
5469: $file=~s-^/home/(\w+)/public_html/-/~$1/-;
5470: return $file;
5471: }
5472: return $file;
5473: }
5474:
5475: sub current_machine_domains {
5476: my $hostname=$hostname{$perlvar{'lonHostID'}};
5477: my @domains;
5478: while( my($id, $name) = each(%hostname)) {
5479: # &logthis("-$id-$name-$hostname-");
5480: if ($hostname eq $name) {
5481: push(@domains,$hostdom{$id});
5482: }
5483: }
5484: return @domains;
5485: }
5486:
5487: sub current_machine_ids {
5488: my $hostname=$hostname{$perlvar{'lonHostID'}};
5489: my @ids;
5490: while( my($id, $name) = each(%hostname)) {
5491: # &logthis("-$id-$name-$hostname-");
5492: if ($hostname eq $name) {
5493: push(@ids,$id);
5494: }
5495: }
5496: return @ids;
5497: }
5498:
5499: # ------------------------------------------------------------- Declutters URLs
5500:
5501: sub declutter {
5502: my $thisfn=shift;
5503: if ($thisfn=~m|^/enc/|) { $thisfn=&Apache::lonenc::unencrypted($thisfn); }
5504: $thisfn=~s/^\Q$perlvar{'lonDocRoot'}\E//;
5505: $thisfn=~s/^\///;
5506: $thisfn=~s/^res\///;
5507: $thisfn=~s/\?.+$//;
5508: return $thisfn;
5509: }
5510:
5511: # ------------------------------------------------------------- Clutter up URLs
5512:
5513: sub clutter {
5514: my $thisfn='/'.&declutter(shift);
5515: unless ($thisfn=~/^\/(uploaded|editupload|adm|userfiles|ext|raw|priv|public)\//) {
5516: $thisfn='/res'.$thisfn;
5517: }
5518: return $thisfn;
5519: }
5520:
5521: sub freeze_escape {
5522: my ($value)=@_;
5523: if (ref($value)) {
5524: $value=&nfreeze($value);
5525: return '__FROZEN__'.&escape($value);
5526: }
5527: return &escape($value);
5528: }
5529:
5530: # -------------------------------------------------------- Escape Special Chars
5531:
5532: sub escape {
5533: my $str=shift;
5534: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
5535: return $str;
5536: }
5537:
5538: # ----------------------------------------------------- Un-Escape Special Chars
5539:
5540: sub unescape {
5541: my $str=shift;
5542: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
5543: return $str;
5544: }
5545:
5546: sub thaw_unescape {
5547: my ($value)=@_;
5548: if ($value =~ /^__FROZEN__/) {
5549: substr($value,0,10,undef);
5550: $value=&unescape($value);
5551: return &thaw($value);
5552: }
5553: return &unescape($value);
5554: }
5555:
5556: sub mod_perl_version {
5557: return 1;
5558: if (defined($perlvar{'MODPERL2'})) {
5559: return 2;
5560: }
5561: }
5562:
5563: sub correct_line_ends {
5564: my ($result)=@_;
5565: $$result =~s/\r\n/\n/mg;
5566: $$result =~s/\r/\n/mg;
5567: }
5568: # ================================================================ Main Program
5569:
5570: sub goodbye {
5571: &logthis("Starting Shut down");
5572: #not converted to using infrastruture and probably shouldn't be
5573: &logthis(sprintf("%-20s is %s",'%badServerCache',length(&freeze(\%badServerCache))));
5574: #converted
5575: # &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
5576: &logthis(sprintf("%-20s is %s",'%homecache',length(&freeze(\%homecache))));
5577: # &logthis(sprintf("%-20s is %s",'%titlecache',length(&freeze(\%titlecache))));
5578: # &logthis(sprintf("%-20s is %s",'%courseresdatacache',length(&freeze(\%courseresdatacache))));
5579: #1.1 only
5580: # &logthis(sprintf("%-20s is %s",'%userresdatacache',length(&freeze(\%userresdatacache))));
5581: # &logthis(sprintf("%-20s is %s",'%getsectioncache',length(&freeze(\%getsectioncache))));
5582: # &logthis(sprintf("%-20s is %s",'%courseresversioncache',length(&freeze(\%courseresversioncache))));
5583: # &logthis(sprintf("%-20s is %s",'%resversioncache',length(&freeze(\%resversioncache))));
5584: &logthis(sprintf("%-20s is %s",'%remembered',length(&freeze(\%remembered))));
5585: &logthis(sprintf("%-20s is %s",'kicks',$kicks));
5586: &logthis(sprintf("%-20s is %s",'hits',$hits));
5587: &flushcourselogs();
5588: &logthis("Shutting down");
5589: return DONE;
5590: }
5591:
5592: BEGIN {
5593: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
5594: unless ($readit) {
5595: {
5596: # FIXME: Use LONCAPA::Configuration::read_conf here and omit next block
5597: open(my $config,"</etc/httpd/conf/loncapa.conf");
5598:
5599: while (my $configline=<$config>) {
5600: if ($configline=~/\S/ && $configline =~ /^[^\#]*PerlSetVar/) {
5601: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5602: chomp($varvalue);
5603: $perlvar{$varname}=$varvalue;
5604: }
5605: }
5606: close($config);
5607: }
5608: {
5609: open(my $config,"</etc/httpd/conf/loncapa_apache.conf");
5610:
5611: while (my $configline=<$config>) {
5612: if ($configline =~ /^[^\#]*PerlSetVar/) {
5613: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
5614: chomp($varvalue);
5615: $perlvar{$varname}=$varvalue;
5616: }
5617: }
5618: close($config);
5619: }
5620:
5621: # ------------------------------------------------------------ Read domain file
5622: {
5623: %domaindescription = ();
5624: %domain_auth_def = ();
5625: %domain_auth_arg_def = ();
5626: my $fh;
5627: if (open($fh,"<".$Apache::lonnet::perlvar{'lonTabDir'}.'/domain.tab')) {
5628: while (<$fh>) {
5629: next if (/^(\#|\s*$)/);
5630: # next if /^\#/;
5631: chomp;
5632: my ($domain, $domain_description, $def_auth, $def_auth_arg,
5633: $def_lang, $city, $longi, $lati) = split(/:/,$_);
5634: $domain_auth_def{$domain}=$def_auth;
5635: $domain_auth_arg_def{$domain}=$def_auth_arg;
5636: $domaindescription{$domain}=$domain_description;
5637: $domain_lang_def{$domain}=$def_lang;
5638: $domain_city{$domain}=$city;
5639: $domain_longi{$domain}=$longi;
5640: $domain_lati{$domain}=$lati;
5641:
5642: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
5643: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
5644: }
5645: }
5646: close ($fh);
5647: }
5648:
5649:
5650: # ------------------------------------------------------------- Read hosts file
5651: {
5652: open(my $config,"<$perlvar{'lonTabDir'}/hosts.tab");
5653:
5654: while (my $configline=<$config>) {
5655: next if ($configline =~ /^(\#|\s*$)/);
5656: chomp($configline);
5657: my ($id,$domain,$role,$name)=split(/:/,$configline);
5658: $name=~s/\s//g;
5659: if ($id && $domain && $role && $name) {
5660: $hostname{$id}=$name;
5661: $hostdom{$id}=$domain;
5662: if ($role eq 'library') { $libserv{$id}=$name; }
5663: }
5664: }
5665: close($config);
5666: # FIXME: dev server don't want this, production servers _do_ want this
5667: #&get_iphost();
5668: }
5669:
5670: sub get_iphost {
5671: if (%iphost) { return %iphost; }
5672: foreach my $id (keys(%hostname)) {
5673: my $name=$hostname{$id};
5674: my $ip = gethostbyname($name);
5675: if (!$ip || length($ip) ne 4) {
5676: &logthis("Skipping host $id name $name no IP found\n");
5677: next;
5678: }
5679: $ip=inet_ntoa($ip);
5680: push(@{$iphost{$ip}},$id);
5681: }
5682: return %iphost;
5683: }
5684:
5685: # ------------------------------------------------------ Read spare server file
5686: {
5687: open(my $config,"<$perlvar{'lonTabDir'}/spare.tab");
5688:
5689: while (my $configline=<$config>) {
5690: chomp($configline);
5691: if ($configline) {
5692: $spareid{$configline}=1;
5693: }
5694: }
5695: close($config);
5696: }
5697: # ------------------------------------------------------------ Read permissions
5698: {
5699: open(my $config,"<$perlvar{'lonTabDir'}/roles.tab");
5700:
5701: while (my $configline=<$config>) {
5702: chomp($configline);
5703: if ($configline) {
5704: my ($role,$perm)=split(/ /,$configline);
5705: if ($perm ne '') { $pr{$role}=$perm; }
5706: }
5707: }
5708: close($config);
5709: }
5710:
5711: # -------------------------------------------- Read plain texts for permissions
5712: {
5713: open(my $config,"<$perlvar{'lonTabDir'}/rolesplain.tab");
5714:
5715: while (my $configline=<$config>) {
5716: chomp($configline);
5717: if ($configline) {
5718: my ($short,$plain)=split(/:/,$configline);
5719: if ($plain ne '') { $prp{$short}=$plain; }
5720: }
5721: }
5722: close($config);
5723: }
5724:
5725: # ---------------------------------------------------------- Read package table
5726: {
5727: open(my $config,"<$perlvar{'lonTabDir'}/packages.tab");
5728:
5729: while (my $configline=<$config>) {
5730: if ($configline !~ /\S/ || $configline=~/^#/) { next; }
5731: chomp($configline);
5732: my ($short,$plain)=split(/:/,$configline);
5733: my ($pack,$name)=split(/\&/,$short);
5734: if ($plain ne '') {
5735: $packagetab{$pack.'&'.$name.'&name'}=$name;
5736: $packagetab{$short}=$plain;
5737: }
5738: }
5739: close($config);
5740: }
5741:
5742: # ------------- set up temporary directory
5743: {
5744: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
5745:
5746: }
5747:
5748: $memcache=new Cache::Memcached({'servers'=>['127.0.0.1:11211']});
5749:
5750: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
5751: $dumpcount=0;
5752:
5753: &logtouch();
5754: &logthis('<font color=yellow>INFO: Read configuration</font>');
5755: $readit=1;
5756: {
5757: use integer;
5758: my $test=(2**32)+1;
5759: if ($test != 0) { $_64bit=1; } else { $_64bit=0; }
5760: &logthis(" Detected 64bit platform ($_64bit)");
5761: }
5762: }
5763: }
5764:
5765: 1;
5766: __END__
5767:
5768: =pod
5769:
5770: =head1 NAME
5771:
5772: Apache::lonnet - Subroutines to ask questions about things in the network.
5773:
5774: =head1 SYNOPSIS
5775:
5776: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
5777:
5778: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
5779:
5780: Common parameters:
5781:
5782: =over 4
5783:
5784: =item *
5785:
5786: $uname : an internal username (if $cname expecting a course Id specifically)
5787:
5788: =item *
5789:
5790: $udom : a domain (if $cdom expecting a course's domain specifically)
5791:
5792: =item *
5793:
5794: $symb : a resource instance identifier
5795:
5796: =item *
5797:
5798: $namespace : the name of a .db file that contains the data needed or
5799: being set.
5800:
5801: =back
5802:
5803: =head1 OVERVIEW
5804:
5805: lonnet provides subroutines which interact with the
5806: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
5807: about classes, users, and resources.
5808:
5809: For many of these objects you can also use this to store data about
5810: them or modify them in various ways.
5811:
5812: =head2 Symbs
5813:
5814: To identify a specific instance of a resource, LON-CAPA uses symbols
5815: or "symbs"X<symb>. These identifiers are built from the URL of the
5816: map, the resource number of the resource in the map, and the URL of
5817: the resource itself. The latter is somewhat redundant, but might help
5818: if maps change.
5819:
5820: An example is
5821:
5822: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
5823:
5824: The respective map entry is
5825:
5826: <resource id="19" src="/res/msu/korte/tests/part12.problem"
5827: title="Problem 2">
5828: </resource>
5829:
5830: Symbs are used by the random number generator, as well as to store and
5831: restore data specific to a certain instance of for example a problem.
5832:
5833: =head2 Storing And Retrieving Data
5834:
5835: X<store()>X<cstore()>X<restore()>Three of the most important functions
5836: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
5837: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
5838: is is the non-critical message twin of cstore. These functions are for
5839: handlers to store a perl hash to a user's permanent data space in an
5840: easy manner, and to retrieve it again on another call. It is expected
5841: that a handler would use this once at the beginning to retrieve data,
5842: and then again once at the end to send only the new data back.
5843:
5844: The data is stored in the user's data directory on the user's
5845: homeserver under the ID of the course.
5846:
5847: The hash that is returned by restore will have all of the previous
5848: value for all of the elements of the hash.
5849:
5850: Example:
5851:
5852: #creating a hash
5853: my %hash;
5854: $hash{'foo'}='bar';
5855:
5856: #storing it
5857: &Apache::lonnet::cstore(\%hash);
5858:
5859: #changing a value
5860: $hash{'foo'}='notbar';
5861:
5862: #adding a new value
5863: $hash{'bar'}='foo';
5864: &Apache::lonnet::cstore(\%hash);
5865:
5866: #retrieving the hash
5867: my %history=&Apache::lonnet::restore();
5868:
5869: #print the hash
5870: foreach my $key (sort(keys(%history))) {
5871: print("\%history{$key} = $history{$key}");
5872: }
5873:
5874: Will print out:
5875:
5876: %history{1:foo} = bar
5877: %history{1:keys} = foo:timestamp
5878: %history{1:timestamp} = 990455579
5879: %history{2:bar} = foo
5880: %history{2:foo} = notbar
5881: %history{2:keys} = foo:bar:timestamp
5882: %history{2:timestamp} = 990455580
5883: %history{bar} = foo
5884: %history{foo} = notbar
5885: %history{timestamp} = 990455580
5886: %history{version} = 2
5887:
5888: Note that the special hash entries C<keys>, C<version> and
5889: C<timestamp> were added to the hash. C<version> will be equal to the
5890: total number of versions of the data that have been stored. The
5891: C<timestamp> attribute will be the UNIX time the hash was
5892: stored. C<keys> is available in every historical section to list which
5893: keys were added or changed at a specific historical revision of a
5894: hash.
5895:
5896: B<Warning>: do not store the hash that restore returns directly. This
5897: will cause a mess since it will restore the historical keys as if the
5898: were new keys. I.E. 1:foo will become 1:1:foo etc.
5899:
5900: Calling convention:
5901:
5902: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
5903: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
5904:
5905: For more detailed information, see lonnet specific documentation.
5906:
5907: =head1 RETURN MESSAGES
5908:
5909: =over 4
5910:
5911: =item * B<con_lost>: unable to contact remote host
5912:
5913: =item * B<con_delayed>: unable to contact remote host, message will be delivered
5914: when the connection is brought back up
5915:
5916: =item * B<con_failed>: unable to contact remote host and unable to save message
5917: for later delivery
5918:
5919: =item * B<error:>: an error a occured, a description of the error follows the :
5920:
5921: =item * B<no_such_host>: unable to fund a host associated with the user/domain
5922: that was requested
5923:
5924: =back
5925:
5926: =head1 PUBLIC SUBROUTINES
5927:
5928: =head2 Session Environment Functions
5929:
5930: =over 4
5931:
5932: =item *
5933: X<appenv()>
5934: B<appenv(%hash)>: the value of %hash is written to
5935: the user envirnoment file, and will be restored for each access this
5936: user makes during this session, also modifies the %ENV for the current
5937: process
5938:
5939: =item *
5940: X<delenv()>
5941: B<delenv($regexp)>: removes all items from the session
5942: environment file that matches the regular expression in $regexp. The
5943: values are also delted from the current processes %ENV.
5944:
5945: =back
5946:
5947: =head2 User Information
5948:
5949: =over 4
5950:
5951: =item *
5952: X<queryauthenticate()>
5953: B<queryauthenticate($uname,$udom)>: try to determine user's current
5954: authentication scheme
5955:
5956: =item *
5957: X<authenticate()>
5958: B<authenticate($uname,$upass,$udom)>: try to
5959: authenticate user from domain's lib servers (first use the current
5960: one). C<$upass> should be the users password.
5961:
5962: =item *
5963: X<homeserver()>
5964: B<homeserver($uname,$udom)>: find the server which has
5965: the user's directory and files (there must be only one), this caches
5966: the answer, and also caches if there is a borken connection.
5967:
5968: =item *
5969: X<idget()>
5970: B<idget($udom,@ids)>: find the usernames behind a list of IDs
5971: (IDs are a unique resource in a domain, there must be only 1 ID per
5972: username, and only 1 username per ID in a specific domain) (returns
5973: hash: id=>name,id=>name)
5974:
5975: =item *
5976: X<idrget()>
5977: B<idrget($udom,@unames)>: find the IDs behind a list of
5978: usernames (returns hash: name=>id,name=>id)
5979:
5980: =item *
5981: X<idput()>
5982: B<idput($udom,%ids)>: store away a list of names and associated IDs
5983:
5984: =item *
5985: X<rolesinit()>
5986: B<rolesinit($udom,$username,$authhost)>: get user privileges
5987:
5988: =item *
5989: X<getsection()>
5990: B<getsection($udom,$uname,$cname)>: finds the section of student in the
5991: course $cname, return section name/number or '' for "not in course"
5992: and '-1' for "no section"
5993:
5994: =item *
5995: X<userenvironment()>
5996: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
5997: passed in @what from the requested user's environment, returns a hash
5998:
5999: =back
6000:
6001: =head2 User Roles
6002:
6003: =over 4
6004:
6005: =item *
6006:
6007: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
6008: actions
6009: F: full access
6010: U,I,K: authentication modes (cxx only)
6011: '': forbidden
6012: 1: user needs to choose course
6013: 2: browse allowed
6014:
6015: =item *
6016:
6017: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
6018: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
6019: and course level
6020:
6021: =item *
6022:
6023: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
6024: explanation of a user role term
6025:
6026: =back
6027:
6028: =head2 User Modification
6029:
6030: =over 4
6031:
6032: =item *
6033:
6034: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
6035: user for the level given by URL. Optional start and end dates (leave empty
6036: string or zero for "no date")
6037:
6038: =item *
6039:
6040: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
6041: change a users, password, possible return values are: ok,
6042: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
6043: refused
6044:
6045: =item *
6046:
6047: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
6048:
6049: =item *
6050:
6051: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
6052: modify user
6053:
6054: =item *
6055:
6056: modifystudent
6057:
6058: modify a students enrollment and identification information.
6059: The course id is resolved based on the current users environment.
6060: This means the envoking user must be a course coordinator or otherwise
6061: associated with a course.
6062:
6063: This call is essentially a wrapper for lonnet::modifyuser and
6064: lonnet::modify_student_enrollment
6065:
6066: Inputs:
6067:
6068: =over 4
6069:
6070: =item B<$udom> Students loncapa domain
6071:
6072: =item B<$uname> Students loncapa login name
6073:
6074: =item B<$uid> Students id/student number
6075:
6076: =item B<$umode> Students authentication mode
6077:
6078: =item B<$upass> Students password
6079:
6080: =item B<$first> Students first name
6081:
6082: =item B<$middle> Students middle name
6083:
6084: =item B<$last> Students last name
6085:
6086: =item B<$gene> Students generation
6087:
6088: =item B<$usec> Students section in course
6089:
6090: =item B<$end> Unix time of the roles expiration
6091:
6092: =item B<$start> Unix time of the roles start date
6093:
6094: =item B<$forceid> If defined, allow $uid to be changed
6095:
6096: =item B<$desiredhome> server to use as home server for student
6097:
6098: =back
6099:
6100: =item *
6101:
6102: modify_student_enrollment
6103:
6104: Change a students enrollment status in a class. The environment variable
6105: 'role.request.course' must be defined for this function to proceed.
6106:
6107: Inputs:
6108:
6109: =over 4
6110:
6111: =item $udom, students domain
6112:
6113: =item $uname, students name
6114:
6115: =item $uid, students user id
6116:
6117: =item $first, students first name
6118:
6119: =item $middle
6120:
6121: =item $last
6122:
6123: =item $gene
6124:
6125: =item $usec
6126:
6127: =item $end
6128:
6129: =item $start
6130:
6131: =back
6132:
6133:
6134: =item *
6135:
6136: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
6137: custom role; give a custom role to a user for the level given by URL. Specify
6138: name and domain of role author, and role name
6139:
6140: =item *
6141:
6142: revokerole($udom,$uname,$url,$role) : revoke a role for url
6143:
6144: =item *
6145:
6146: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
6147:
6148: =back
6149:
6150: =head2 Course Infomation
6151:
6152: =over 4
6153:
6154: =item *
6155:
6156: coursedescription($courseid) : course description
6157:
6158: =item *
6159:
6160: courseresdata($coursenum,$coursedomain,@which) : request for current
6161: parameter setting for a specific course, @what should be a list of
6162: parameters to ask about. This routine caches answers for 5 minutes.
6163:
6164: =back
6165:
6166: =head2 Course Modification
6167:
6168: =over 4
6169:
6170: =item *
6171:
6172: writecoursepref($courseid,%prefs) : write preferences (environment
6173: database) for a course
6174:
6175: =item *
6176:
6177: createcourse($udom,$description,$url) : make/modify course
6178:
6179: =back
6180:
6181: =head2 Resource Subroutines
6182:
6183: =over 4
6184:
6185: =item *
6186:
6187: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
6188:
6189: =item *
6190:
6191: repcopy($filename) : subscribes to the requested file, and attempts to
6192: replicate from the owning library server, Might return
6193: 'unavailable', 'not_found', 'forbidden', 'ok', or
6194: 'bad_request', also attempts to grab the metadata for the
6195: resource. Expects the local filesystem pathname
6196: (/home/httpd/html/res/....)
6197:
6198: =back
6199:
6200: =head2 Resource Information
6201:
6202: =over 4
6203:
6204: =item *
6205:
6206: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
6207: a vairety of different possible values, $varname should be a request
6208: string, and the other parameters can be used to specify who and what
6209: one is asking about.
6210:
6211: Possible values for $varname are environment.lastname (or other item
6212: from the envirnment hash), user.name (or someother aspect about the
6213: user), resource.0.maxtries (or some other part and parameter of a
6214: resource)
6215:
6216: =item *
6217:
6218: directcondval($number) : get current value of a condition; reads from a state
6219: string
6220:
6221: =item *
6222:
6223: condval($condidx) : value of condition index based on state
6224:
6225: =item *
6226:
6227: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
6228: resource's metadata, $what should be either a specific key, or either
6229: 'keys' (to get a list of possible keys) or 'packages' to get a list of
6230: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
6231:
6232: this function automatically caches all requests
6233:
6234: =item *
6235:
6236: metadata_query($query,$custom,$customshow) : make a metadata query against the
6237: network of library servers; returns file handle of where SQL and regex results
6238: will be stored for query
6239:
6240: =item *
6241:
6242: symbread($filename) : return symbolic list entry (filename argument optional);
6243: returns the data handle
6244:
6245: =item *
6246:
6247: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
6248: a possible symb for the URL in $thisfn, and if is an encryypted
6249: resource that the user accessed using /enc/ returns a 1 on success, 0
6250: on failure, user must be in a course, as it assumes the existance of
6251: the course initial hash, and uses $ENV('request.course.id'}
6252:
6253:
6254: =item *
6255:
6256: symbclean($symb) : removes versions numbers from a symb, returns the
6257: cleaned symb
6258:
6259: =item *
6260:
6261: is_on_map($uri) : checks if the $uri is somewhere on the current
6262: course map, user must be in a course for it to work.
6263:
6264: =item *
6265:
6266: numval($salt) : return random seed value (addend for rndseed)
6267:
6268: =item *
6269:
6270: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
6271: a random seed, all arguments are optional, if they aren't sent it uses the
6272: environment to derive them. Note: if symb isn't sent and it can't get one
6273: from &symbread it will use the current time as its return value
6274:
6275: =item *
6276:
6277: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
6278: unfakeable, receipt
6279:
6280: =item *
6281:
6282: receipt() : API to ireceipt working off of ENV values; given out to users
6283:
6284: =item *
6285:
6286: countacc($url) : count the number of accesses to a given URL
6287:
6288: =item *
6289:
6290: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
6291:
6292: =item *
6293:
6294: checkin($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 $tcrsid)
6295:
6296: =item *
6297:
6298: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
6299:
6300: =item *
6301:
6302: devalidate($symb) : devalidate temporary spreadsheet calculations,
6303: forcing spreadsheet to reevaluate the resource scores next time.
6304:
6305: =back
6306:
6307: =head2 Storing/Retreiving Data
6308:
6309: =over 4
6310:
6311: =item *
6312:
6313: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
6314: for this url; hashref needs to be given and should be a \%hashname; the
6315: remaining args aren't required and if they aren't passed or are '' they will
6316: be derived from the ENV
6317:
6318: =item *
6319:
6320: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
6321: uses critical subroutine
6322:
6323: =item *
6324:
6325: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
6326: all args are optional
6327:
6328: =item *
6329:
6330: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
6331: works very similar to store/cstore, but all data is stored in a
6332: temporary location and can be reset using tmpreset, $storehash should
6333: be a hash reference, returns nothing on success
6334:
6335: =item *
6336:
6337: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
6338: similar to restore, but all data is stored in a temporary location and
6339: can be reset using tmpreset. Returns a hash of values on success,
6340: error string otherwise.
6341:
6342: =item *
6343:
6344: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
6345: deltes all keys for $symb form the temporary storage hash.
6346:
6347: =item *
6348:
6349: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6350: reference filled in from namesp ($udom and $uname are optional)
6351:
6352: =item *
6353:
6354: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
6355: namesp ($udom and $uname are optional)
6356:
6357: =item *
6358:
6359: dump($namespace,$udom,$uname,$regexp) :
6360: dumps the complete (or key matching regexp) namespace into a hash
6361: ($udom, $uname and $regexp are optional)
6362:
6363: =item *
6364:
6365: inc($namespace,$store,$udom,$uname) : increments $store in $namespace.
6366: $store can be a scalar, an array reference, or if the amount to be
6367: incremented is > 1, a hash reference.
6368:
6369: ($udom and $uname are optional)
6370:
6371: =item *
6372:
6373: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
6374: ($udom and $uname are optional)
6375:
6376: =item *
6377:
6378: putstore($namespace,$storehash,$udomain,$uname) : stores hash in namesp
6379: keys used in storehash include version information (e.g., 1:$symb:message etc.) as
6380: used in records written by &store and retrieved by &restore. This function
6381: was created for use in editing discussion posts, without incrementing the
6382: version number included in the key for a particular post. The colon
6383: separated list of attribute names (e.g., the value associated with the key
6384: 1:keys:$symb) is also generated and passed in the ampersand separated
6385: items sent to lonnet::reply().
6386:
6387: =item *
6388:
6389: cput($namespace,$storehash,$udom,$uname) : critical put
6390: ($udom and $uname are optional)
6391:
6392: =item *
6393:
6394: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
6395: reference filled in from namesp (encrypts the return communication)
6396: ($udom and $uname are optional)
6397:
6398: =item *
6399:
6400: log($udom,$name,$home,$message) : write to permanent log for user; use
6401: critical subroutine
6402:
6403: =back
6404:
6405: =head2 Network Status Functions
6406:
6407: =over 4
6408:
6409: =item *
6410:
6411: dirlist($uri) : return directory list based on URI
6412:
6413: =item *
6414:
6415: spareserver() : find server with least workload from spare.tab
6416:
6417: =back
6418:
6419: =head2 Apache Request
6420:
6421: =over 4
6422:
6423: =item *
6424:
6425: ssi($url,%hash) : server side include, does a complete request cycle on url to
6426: localhost, posts hash
6427:
6428: =back
6429:
6430: =head2 Data to String to Data
6431:
6432: =over 4
6433:
6434: =item *
6435:
6436: hash2str(%hash) : convert a hash into a string complete with escaping and '='
6437: and '&' separators, supports elements that are arrayrefs and hashrefs
6438:
6439: =item *
6440:
6441: hashref2str($hashref) : convert a hashref into a string complete with
6442: escaping and '=' and '&' separators, supports elements that are
6443: arrayrefs and hashrefs
6444:
6445: =item *
6446:
6447: arrayref2str($arrayref) : convert an arrayref into a string complete
6448: with escaping and '&' separators, supports elements that are arrayrefs
6449: and hashrefs
6450:
6451: =item *
6452:
6453: str2hash($string) : convert string to hash using unescaping and
6454: splitting on '=' and '&', supports elements that are arrayrefs and
6455: hashrefs
6456:
6457: =item *
6458:
6459: str2array($string) : convert string to hash using unescaping and
6460: splitting on '&', supports elements that are arrayrefs and hashrefs
6461:
6462: =back
6463:
6464: =head2 Logging Routines
6465:
6466: =over 4
6467:
6468: These routines allow one to make log messages in the lonnet.log and
6469: lonnet.perm logfiles.
6470:
6471: =item *
6472:
6473: logtouch() : make sure the logfile, lonnet.log, exists
6474:
6475: =item *
6476:
6477: logthis() : append message to the normal lonnet.log file, it gets
6478: preiodically rolled over and deleted.
6479:
6480: =item *
6481:
6482: logperm() : append a permanent message to lonnet.perm.log, this log
6483: file never gets deleted by any automated portion of the system, only
6484: messages of critical importance should go in here.
6485:
6486: =back
6487:
6488: =head2 General File Helper Routines
6489:
6490: =over 4
6491:
6492: =item *
6493:
6494: getfile($file,$caller) : two cases - requests for files in /res or in /uploaded.
6495: (a) files in /uploaded
6496: (i) If a local copy of the file exists -
6497: compares modification date of local copy with last-modified date for
6498: definitive version stored on home server for course. If local copy is
6499: stale, requests a new version from the home server and stores it.
6500: If the original has been removed from the home server, then local copy
6501: is unlinked.
6502: (ii) If local copy does not exist -
6503: requests the file from the home server and stores it.
6504:
6505: If $caller is 'uploadrep':
6506: This indicates a call from lonuploadrep.pm (PerlHeaderParserHandler phase)
6507: for request for files originally uploaded via DOCS.
6508: - returns 'ok' if fresh local copy now available, -1 otherwise.
6509:
6510: Otherwise:
6511: This indicates a call from the content generation phase of the request.
6512: - returns the entire contents of the file or -1.
6513:
6514: (b) files in /res
6515: - returns the entire contents of a file or -1;
6516: it properly subscribes to and replicates the file if neccessary.
6517:
6518: =item *
6519:
6520: filelocation($dir,$file) : returns file system location of a file
6521: based on URI; meant to be "fairly clean" absolute reference, $dir is a
6522: directory that relative $file lookups are to looked in ($dir of /a/dir
6523: and a file of ../bob will become /a/bob)
6524:
6525: =item *
6526:
6527: hreflocation($dir,$file) : returns file system location or a URL; same as
6528: filelocation except for hrefs
6529:
6530: =item *
6531:
6532: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
6533:
6534: =back
6535:
6536: =head2 Usererfile file routines (/uploaded*)
6537:
6538: =over 4
6539:
6540: =item *
6541:
6542: userfileupload(): main rotine for putting a file in a user or course's
6543: filespace, arguments are,
6544:
6545: formname - required - this is the name of the element in $ENV where the
6546: filename, and the contents of the file to create/modifed exist
6547: the filename is in $ENV{'form.'.$formname.'.filename'} and the
6548: contents of the file is located in $ENV{'form.'.$formname}
6549: coursedoc - if true, store the file in the course of the active role
6550: of the current user
6551: subdir - required - subdirectory to put the file in under ../userfiles/
6552: if undefined, it will be placed in "unknown"
6553:
6554: (This routine calls clean_filename() to remove any dangerous
6555: characters from the filename, and then calls finuserfileupload() to
6556: complete the transaction)
6557:
6558: returns either the url of the uploaded file (/uploaded/....) if successful
6559: and /adm/notfound.html if unsuccessful
6560:
6561: =item *
6562:
6563: clean_filename(): routine for cleaing a filename up for storage in
6564: userfile space, argument is:
6565:
6566: filename - proposed filename
6567:
6568: returns: the new clean filename
6569:
6570: =item *
6571:
6572: finishuserfileupload(): routine that creaes and sends the file to
6573: userspace, probably shouldn't be called directly
6574:
6575: docuname: username or courseid of destination for the file
6576: docudom: domain of user/course of destination for the file
6577: docuhome: loncapa id of the library server that is getting the file
6578: formname: same as for userfileupload()
6579: fname: filename (inculding subdirectories) for the file
6580:
6581: returns either the url of the uploaded file (/uploaded/....) if successful
6582: and /adm/notfound.html if unsuccessful
6583:
6584: =item *
6585:
6586: renameuserfile(): renames an existing userfile to a new name
6587:
6588: Args:
6589: docuname: username or courseid of destination for the file
6590: docudom: domain of user/course of destination for the file
6591: old: current file name (including any subdirs under userfiles)
6592: new: desired file name (including any subdirs under userfiles)
6593:
6594: =item *
6595:
6596: mkdiruserfile(): creates a directory is a userfiles dir
6597:
6598: Args:
6599: docuname: username or courseid of destination for the file
6600: docudom: domain of user/course of destination for the file
6601: dir: dir to create (including any subdirs under userfiles)
6602:
6603: =item *
6604:
6605: removeuserfile(): removes a file that exists in userfiles
6606:
6607: Args:
6608: docuname: username or courseid of destination for the file
6609: docudom: domain of user/course of destination for the file
6610: fname: filname to delete (including any subdirs under userfiles)
6611:
6612: =item *
6613:
6614: removeuploadedurl(): convience function for removeuserfile()
6615:
6616: Args:
6617: url: a full /uploaded/... url to delete
6618:
6619: =back
6620:
6621: =head2 HTTP Helper Routines
6622:
6623: =over 4
6624:
6625: =item *
6626:
6627: escape() : unpack non-word characters into CGI-compatible hex codes
6628:
6629: =item *
6630:
6631: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
6632:
6633: =back
6634:
6635: =head1 PRIVATE SUBROUTINES
6636:
6637: =head2 Underlying communication routines (Shouldn't call)
6638:
6639: =over 4
6640:
6641: =item *
6642:
6643: subreply() : tries to pass a message to lonc, returns con_lost if incapable
6644:
6645: =item *
6646:
6647: reply() : uses subreply to send a message to remote machine, logs all failures
6648:
6649: =item *
6650:
6651: critical() : passes a critical message to another server; if cannot
6652: get through then place message in connection buffer directory and
6653: returns con_delayed, if incapable of saving message, returns
6654: con_failed
6655:
6656: =item *
6657:
6658: reconlonc() : tries to reconnect lonc client processes.
6659:
6660: =back
6661:
6662: =head2 Resource Access Logging
6663:
6664: =over 4
6665:
6666: =item *
6667:
6668: flushcourselogs() : flush (save) buffer logs and access logs
6669:
6670: =item *
6671:
6672: courselog($what) : save message for course in hash
6673:
6674: =item *
6675:
6676: courseacclog($what) : save message for course using &courselog(). Perform
6677: special processing for specific resource types (problems, exams, quizzes, etc).
6678:
6679: =item *
6680:
6681: goodbye() : flush course logs and log shutting down; it is called in srm.conf
6682: as a PerlChildExitHandler
6683:
6684: =back
6685:
6686: =head2 Other
6687:
6688: =over 4
6689:
6690: =item *
6691:
6692: symblist($mapname,%newhash) : update symbolic storage links
6693:
6694: =back
6695:
6696: =cut
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