Annotation of loncom/lonnet/perl/lonnet.pm, revision 1.435
1.1 albertel 1: # The LearningOnline Network
2: # TCP networking package
1.12 www 3: #
1.435 ! www 4: # $Id: lonnet.pm,v 1.434 2003/10/29 22:33:49 www Exp $
1.178 www 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: #
1.169 harris41 28: ###
29:
1.1 albertel 30: package Apache::lonnet;
31:
32: use strict;
33: use Apache::File;
1.8 www 34: use LWP::UserAgent();
1.15 www 35: use HTTP::Headers;
1.11 www 36: use vars
1.300 albertel 37: qw(%perlvar %hostname %homecache %badServerCache %hostip %iphost %spareid %hostdom
1.301 www 38: %libserv %pr %prp %metacache %packagetab %titlecache
1.349 www 39: %courselogs %accesshash %userrolehash $processmarker $dumpcount
1.352 www 40: %coursedombuf %coursenumbuf %coursehombuf %coursedescrbuf %courseresdatacache
1.420 albertel 41: %userresdatacache %usectioncache %domaindescription %domain_auth_def %domain_auth_arg_def
1.403 www 42: %domain_lang_def %domain_city %domain_longi %domain_lati $tmpdir);
43:
1.1 albertel 44: use IO::Socket;
1.31 www 45: use GDBM_File;
1.8 www 46: use Apache::Constants qw(:common :http);
1.208 albertel 47: use HTML::LCParser;
1.88 www 48: use Fcntl qw(:flock);
1.294 matthew 49: use Apache::loncoursedata;
1.414 www 50: use Apache::lonlocal;
1.428 albertel 51: use Storable qw(lock_store lock_nstore lock_retrieve freeze thaw);
1.425 albertel 52: use Time::HiRes();
1.195 www 53: my $readit;
1.1 albertel 54:
55: # --------------------------------------------------------------------- Logging
56:
1.163 harris41 57: sub logtouch {
58: my $execdir=$perlvar{'lonDaemons'};
59: unless (-e "$execdir/logs/lonnet.log") {
60: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
61: close $fh;
62: }
63: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
64: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
65: }
66:
1.1 albertel 67: sub logthis {
68: my $message=shift;
69: my $execdir=$perlvar{'lonDaemons'};
70: my $now=time;
71: my $local=localtime($now);
1.162 harris41 72: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
73: print $fh "$local ($$): $message\n";
1.1 albertel 74: return 1;
75: }
76:
77: sub logperm {
78: my $message=shift;
79: my $execdir=$perlvar{'lonDaemons'};
80: my $now=time;
81: my $local=localtime($now);
1.162 harris41 82: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
83: print $fh "$now:$message:$local\n";
1.1 albertel 84: return 1;
85: }
86:
87: # -------------------------------------------------- Non-critical communication
88: sub subreply {
89: my ($cmd,$server)=@_;
90: my $peerfile="$perlvar{'lonSockDir'}/$server";
91: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
92: Type => SOCK_STREAM,
93: Timeout => 10)
94: or return "con_lost";
95: print $client "$cmd\n";
96: my $answer=<$client>;
1.9 www 97: if (!$answer) { $answer="con_lost"; }
1.1 albertel 98: chomp($answer);
99: return $answer;
100: }
101:
102: sub reply {
103: my ($cmd,$server)=@_;
1.205 www 104: unless (defined($hostname{$server})) { return 'no_such_host'; }
1.1 albertel 105: my $answer=subreply($cmd,$server);
1.203 www 106: if ($answer eq 'con_lost') {
1.311 matthew 107: #sleep 5;
108: #$answer=subreply($cmd,$server);
109: #if ($answer eq 'con_lost') {
1.233 albertel 110: # &logthis("Second attempt con_lost on $server");
111: # my $peerfile="$perlvar{'lonSockDir'}/$server";
112: # my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
113: # Type => SOCK_STREAM,
114: # Timeout => 10)
115: # or return "con_lost";
116: # &logthis("Killing socket");
117: # print $client "close_connection_exit\n";
118: #sleep 5;
119: # $answer=subreply($cmd,$server);
120: #}
1.203 www 121: }
1.65 www 122: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
1.12 www 123: &logthis("<font color=blue>WARNING:".
124: " $cmd to $server returned $answer</font>");
125: }
1.1 albertel 126: return $answer;
127: }
128:
129: # ----------------------------------------------------------- Send USR1 to lonc
130:
131: sub reconlonc {
132: my $peerfile=shift;
133: &logthis("Trying to reconnect for $peerfile");
134: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
135: if (my $fh=Apache::File->new("$loncfile")) {
136: my $loncpid=<$fh>;
137: chomp($loncpid);
138: if (kill 0 => $loncpid) {
139: &logthis("lonc at pid $loncpid responding, sending USR1");
140: kill USR1 => $loncpid;
141: sleep 1;
142: if (-e "$peerfile") { return; }
143: &logthis("$peerfile still not there, give it another try");
144: sleep 5;
145: if (-e "$peerfile") { return; }
1.12 www 146: &logthis(
147: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
1.1 albertel 148: } else {
1.12 www 149: &logthis(
150: "<font color=blue>WARNING:".
151: " lonc at pid $loncpid not responding, giving up</font>");
1.1 albertel 152: }
153: } else {
1.12 www 154: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
1.1 albertel 155: }
156: }
157:
158: # ------------------------------------------------------ Critical communication
1.12 www 159:
1.1 albertel 160: sub critical {
161: my ($cmd,$server)=@_;
1.89 www 162: unless ($hostname{$server}) {
163: &logthis("<font color=blue>WARNING:".
164: " Critical message to unknown server ($server)</font>");
165: return 'no_such_host';
166: }
1.1 albertel 167: my $answer=reply($cmd,$server);
168: if ($answer eq 'con_lost') {
169: my $pingreply=reply('ping',$server);
170: &reconlonc("$perlvar{'lonSockDir'}/$server");
171: my $pongreply=reply('pong',$server);
172: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
173: $answer=reply($cmd,$server);
174: if ($answer eq 'con_lost') {
175: my $now=time;
176: my $middlename=$cmd;
1.5 www 177: $middlename=substr($middlename,0,16);
1.1 albertel 178: $middlename=~s/\W//g;
179: my $dfilename=
1.305 www 180: "$perlvar{'lonSockDir'}/delayed/$now.$dumpcount.$$.$middlename.$server";
181: $dumpcount++;
1.1 albertel 182: {
183: my $dfh;
184: if ($dfh=Apache::File->new(">$dfilename")) {
1.7 www 185: print $dfh "$cmd\n";
1.1 albertel 186: }
187: }
188: sleep 2;
189: my $wcmd='';
190: {
191: my $dfh;
192: if ($dfh=Apache::File->new("$dfilename")) {
193: $wcmd=<$dfh>;
194: }
195: }
196: chomp($wcmd);
1.7 www 197: if ($wcmd eq $cmd) {
1.12 www 198: &logthis("<font color=blue>WARNING: ".
199: "Connection buffer $dfilename: $cmd</font>");
1.1 albertel 200: &logperm("D:$server:$cmd");
201: return 'con_delayed';
202: } else {
1.12 www 203: &logthis("<font color=red>CRITICAL:"
204: ." Critical connection failed: $server $cmd</font>");
1.1 albertel 205: &logperm("F:$server:$cmd");
206: return 'con_failed';
207: }
208: }
209: }
210: return $answer;
1.405 albertel 211: }
212:
1.412 www 213: #
1.405 albertel 214: # -------------- Remove all key from the env that start witha lowercase letter
1.412 www 215: # (Which is always a lon-capa value)
216:
1.405 albertel 217: sub cleanenv {
1.412 www 218: # unless (defined(&Apache::exists_config_define("MODPERL2"))) { return; }
219: # unless (&Apache::exists_config_define("MODPERL2")) { return; }
1.405 albertel 220: foreach my $key (keys(%ENV)) {
221: if ($key =~ /^[a-z]/) {
222: delete($ENV{$key});
223: }
224: }
1.374 www 225: }
226:
227: # ------------------------------------------- Transfer profile into environment
228:
229: sub transfer_profile_to_env {
230: my ($lonidsdir,$handle)=@_;
231: my @profile;
232: {
233: my $idf=Apache::File->new("$lonidsdir/$handle.id");
234: flock($idf,LOCK_SH);
235: @profile=<$idf>;
236: $idf->close();
237: }
238: my $envi;
1.433 matthew 239: my %Remove;
1.374 www 240: for ($envi=0;$envi<=$#profile;$envi++) {
241: chomp($profile[$envi]);
242: my ($envname,$envvalue)=split(/=/,$profile[$envi]);
243: $ENV{$envname} = $envvalue;
1.433 matthew 244: if (my ($key,$time) = ($envname =~ /^(cgi\.(\d+)_\d+\.)/)) {
245: if ($time < time-300) {
246: $Remove{$key}++;
247: }
248: }
249: }
250: foreach my $expired_key (keys(%Remove)) {
251: &delenv($expired_key);
1.374 www 252: }
253: $ENV{'user.environment'} = "$lonidsdir/$handle.id";
1.1 albertel 254: }
255:
1.5 www 256: # ---------------------------------------------------------- Append Environment
257:
258: sub appenv {
1.6 www 259: my %newenv=@_;
1.191 harris41 260: foreach (keys %newenv) {
1.35 www 261: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
262: &logthis("<font color=blue>WARNING: ".
1.151 www 263: "Attempt to modify environment ".$_." to ".$newenv{$_}
264: .'</font>');
1.35 www 265: delete($newenv{$_});
266: } else {
267: $ENV{$_}=$newenv{$_};
268: }
1.191 harris41 269: }
1.95 www 270:
271: my $lockfh;
272: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
1.97 www 273: return 'error: '.$!;
1.95 www 274: }
275: unless (flock($lockfh,LOCK_EX)) {
276: &logthis("<font color=blue>WARNING: ".
277: 'Could not obtain exclusive lock in appenv: '.$!);
278: $lockfh->close();
279: return 'error: '.$!;
280: }
281:
1.6 www 282: my @oldenv;
283: {
284: my $fh;
285: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
1.97 www 286: return 'error: '.$!;
1.6 www 287: }
288: @oldenv=<$fh>;
1.89 www 289: $fh->close();
1.6 www 290: }
291: for (my $i=0; $i<=$#oldenv; $i++) {
292: chomp($oldenv[$i]);
1.9 www 293: if ($oldenv[$i] ne '') {
294: my ($name,$value)=split(/=/,$oldenv[$i]);
1.24 www 295: unless (defined($newenv{$name})) {
296: $newenv{$name}=$value;
297: }
1.9 www 298: }
1.6 www 299: }
300: {
301: my $fh;
302: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
303: return 'error';
304: }
305: my $newname;
1.93 www 306: foreach $newname (keys %newenv) {
1.6 www 307: print $fh "$newname=$newenv{$newname}\n";
308: }
1.86 albertel 309: $fh->close();
1.56 www 310: }
1.95 www 311:
312: $lockfh->close();
1.56 www 313: return 'ok';
314: }
315: # ----------------------------------------------------- Delete from Environment
316:
317: sub delenv {
318: my $delthis=shift;
319: my %newenv=();
320: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
321: &logthis("<font color=blue>WARNING: ".
322: "Attempt to delete from environment ".$delthis);
323: return 'error';
324: }
325: my @oldenv;
326: {
327: my $fh;
328: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
329: return 'error';
330: }
1.89 www 331: unless (flock($fh,LOCK_SH)) {
332: &logthis("<font color=blue>WARNING: ".
333: 'Could not obtain shared lock in delenv: '.$!);
334: $fh->close();
335: return 'error: '.$!;
336: }
1.56 www 337: @oldenv=<$fh>;
1.89 www 338: $fh->close();
1.56 www 339: }
340: {
341: my $fh;
342: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
343: return 'error';
344: }
1.89 www 345: unless (flock($fh,LOCK_EX)) {
346: &logthis("<font color=blue>WARNING: ".
347: 'Could not obtain exclusive lock in delenv: '.$!);
348: $fh->close();
349: return 'error: '.$!;
350: }
1.191 harris41 351: foreach (@oldenv) {
1.56 www 352: unless ($_=~/^$delthis/) { print $fh $_; }
1.191 harris41 353: }
1.87 www 354: $fh->close();
1.5 www 355: }
356: return 'ok';
1.369 albertel 357: }
358:
359: # ------------------------------------------ Find out current server userload
360: # there is a copy in lond
361: sub userload {
362: my $numusers=0;
363: {
364: opendir(LONIDS,$perlvar{'lonIDsDir'});
365: my $filename;
366: my $curtime=time;
367: while ($filename=readdir(LONIDS)) {
368: if ($filename eq '.' || $filename eq '..') {next;}
1.404 albertel 369: my ($mtime)=(stat($perlvar{'lonIDsDir'}.'/'.$filename))[9];
370: if ($curtime-$mtime < 3600) { $numusers++; }
1.369 albertel 371: }
372: closedir(LONIDS);
373: }
374: my $userloadpercent=0;
375: my $maxuserload=$perlvar{'lonUserLoadLim'};
376: if ($maxuserload) {
1.371 albertel 377: $userloadpercent=100*$numusers/$maxuserload;
1.369 albertel 378: }
1.372 albertel 379: $userloadpercent=sprintf("%.2f",$userloadpercent);
1.369 albertel 380: return $userloadpercent;
1.283 www 381: }
382:
383: # ------------------------------------------ Fight off request when overloaded
384:
385: sub overloaderror {
386: my ($r,$checkserver)=@_;
387: unless ($checkserver) { $checkserver=$perlvar{'lonHostID'}; }
388: my $loadavg;
389: if ($checkserver eq $perlvar{'lonHostID'}) {
390: my $loadfile=Apache::File->new('/proc/loadavg');
391: $loadavg=<$loadfile>;
392: $loadavg =~ s/\s.*//g;
1.285 matthew 393: $loadavg = 100*$loadavg/$perlvar{'lonLoadLim'};
1.283 www 394: } else {
395: $loadavg=&reply('load',$checkserver);
396: }
1.285 matthew 397: my $overload=$loadavg-100;
1.283 www 398: if ($overload>0) {
1.285 matthew 399: $r->err_headers_out->{'Retry-After'}=$overload;
1.283 www 400: $r->log_error('Overload of '.$overload.' on '.$checkserver);
401: return 413;
402: }
403: return '';
1.5 www 404: }
1.1 albertel 405:
406: # ------------------------------ Find server with least workload from spare.tab
1.11 www 407:
1.1 albertel 408: sub spareserver {
1.370 albertel 409: my ($loadpercent,$userloadpercent) = @_;
1.1 albertel 410: my $tryserver;
411: my $spareserver='';
1.370 albertel 412: if ($userloadpercent !~ /\d/) { $userloadpercent=0; }
413: my $lowestserver=$loadpercent > $userloadpercent?
414: $loadpercent : $userloadpercent;
1.1 albertel 415: foreach $tryserver (keys %spareid) {
1.411 albertel 416: my $loadans=reply('load',$tryserver);
417: my $userloadans=reply('userload',$tryserver);
418: if ($loadans !~ /\d/ && $userloadans !~ /\d/) {
419: next; #didn't get a number from the server
420: }
421: my $answer;
422: if ($loadans =~ /\d/) {
423: if ($userloadans =~ /\d/) {
424: #both are numbers, pick the bigger one
425: $answer=$loadans > $userloadans?
426: $loadans : $userloadans;
427: } else {
428: $answer = $loadans;
429: }
430: } else {
431: $answer = $userloadans;
432: }
433: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
434: $spareserver="http://$hostname{$tryserver}";
435: $lowestserver=$answer;
436: }
1.370 albertel 437: }
1.1 albertel 438: return $spareserver;
1.202 matthew 439: }
440:
441: # --------------------------------------------- Try to change a user's password
442:
443: sub changepass {
444: my ($uname,$udom,$currentpass,$newpass,$server)=@_;
445: $currentpass = &escape($currentpass);
446: $newpass = &escape($newpass);
447: my $answer = reply("encrypt:passwd:$udom:$uname:$currentpass:$newpass",
448: $server);
449: if (! $answer) {
450: &logthis("No reply on password change request to $server ".
451: "by $uname in domain $udom.");
452: } elsif ($answer =~ "^ok") {
453: &logthis("$uname in $udom successfully changed their password ".
454: "on $server.");
455: } elsif ($answer =~ "^pwchange_failure") {
456: &logthis("$uname in $udom was unable to change their password ".
457: "on $server. The action was blocked by either lcpasswd ".
458: "or pwchange");
459: } elsif ($answer =~ "^non_authorized") {
460: &logthis("$uname in $udom did not get their password correct when ".
461: "attempting to change it on $server.");
462: } elsif ($answer =~ "^auth_mode_error") {
463: &logthis("$uname in $udom attempted to change their password despite ".
464: "not being locally or internally authenticated on $server.");
465: } elsif ($answer =~ "^unknown_user") {
466: &logthis("$uname in $udom attempted to change their password ".
467: "on $server but were unable to because $server is not ".
468: "their home server.");
469: } elsif ($answer =~ "^refused") {
470: &logthis("$server refused to change $uname in $udom password because ".
471: "it was sent an unencrypted request to change the password.");
472: }
473: return $answer;
1.1 albertel 474: }
475:
1.169 harris41 476: # ----------------------- Try to determine user's current authentication scheme
477:
478: sub queryauthenticate {
479: my ($uname,$udom)=@_;
480: if (($perlvar{'lonRole'} eq 'library') &&
481: ($udom eq $perlvar{'lonDefDomain'})) {
482: my $answer=reply("encrypt:currentauth:$udom:$uname",
483: $perlvar{'lonHostID'});
484: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
485: if (length($answer)) {
486: return $answer;
487: }
488: else {
489: &logthis("User $uname at $udom lacks an authentication mechanism");
490: return 'no_host';
491: }
492: }
493: }
494:
495: my $tryserver;
496: foreach $tryserver (keys %libserv) {
497: if ($hostdom{$tryserver} eq $udom) {
498: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
499: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
500: if (length($answer)) {
501: return $answer;
502: }
503: else {
504: &logthis("User $uname at $udom lacks an authentication mechanism");
505: return 'no_host';
506: }
507: }
508: }
509: }
510: &logthis("User $uname at $udom lacks an authentication mechanism");
511: return 'no_host';
512: }
513:
1.1 albertel 514: # --------- Try to authenticate user from domain's lib servers (first this one)
1.11 www 515:
1.1 albertel 516: sub authenticate {
517: my ($uname,$upass,$udom)=@_;
1.12 www 518: $upass=escape($upass);
1.199 www 519: $uname=~s/\W//g;
1.1 albertel 520: if (($perlvar{'lonRole'} eq 'library') &&
521: ($udom eq $perlvar{'lonDefDomain'})) {
1.3 www 522: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
1.2 www 523: if ($answer =~ /authorized/) {
1.9 www 524: if ($answer eq 'authorized') {
525: &logthis("User $uname at $udom authorized by local server");
526: return $perlvar{'lonHostID'};
527: }
528: if ($answer eq 'non_authorized') {
529: &logthis("User $uname at $udom rejected by local server");
530: return 'no_host';
531: }
1.2 www 532: }
1.1 albertel 533: }
534:
535: my $tryserver;
536: foreach $tryserver (keys %libserv) {
537: if ($hostdom{$tryserver} eq $udom) {
1.10 www 538: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
1.1 albertel 539: if ($answer =~ /authorized/) {
1.9 www 540: if ($answer eq 'authorized') {
541: &logthis("User $uname at $udom authorized by $tryserver");
542: return $tryserver;
543: }
544: if ($answer eq 'non_authorized') {
545: &logthis("User $uname at $udom rejected by $tryserver");
546: return 'no_host';
547: }
1.1 albertel 548: }
549: }
1.9 www 550: }
551: &logthis("User $uname at $udom could not be authenticated");
1.1 albertel 552: return 'no_host';
553: }
554:
555: # ---------------------- Find the homebase for a user from domain's lib servers
1.11 www 556:
1.1 albertel 557: sub homeserver {
1.230 stredwic 558: my ($uname,$udom,$ignoreBadCache)=@_;
1.1 albertel 559: my $index="$uname:$udom";
1.426 albertel 560:
561: my ($result,$cached)=&is_cached(\%homecache,$index,'home',86400);
562: if (defined($cached)) { return $result; }
1.1 albertel 563: my $tryserver;
564: foreach $tryserver (keys %libserv) {
1.230 stredwic 565: next if ($ignoreBadCache ne 'true' &&
1.231 stredwic 566: exists($badServerCache{$tryserver}));
1.1 albertel 567: if ($hostdom{$tryserver} eq $udom) {
568: my $answer=reply("home:$udom:$uname",$tryserver);
569: if ($answer eq 'found') {
1.426 albertel 570: return &do_cache(\%homecache,$index,$tryserver,'home');
1.231 stredwic 571: } elsif ($answer eq 'no_host') {
572: $badServerCache{$tryserver}=1;
1.221 matthew 573: }
1.1 albertel 574: }
575: }
576: return 'no_host';
1.70 www 577: }
578:
579: # ------------------------------------- Find the usernames behind a list of IDs
580:
581: sub idget {
582: my ($udom,@ids)=@_;
583: my %returnhash=();
584:
585: my $tryserver;
586: foreach $tryserver (keys %libserv) {
587: if ($hostdom{$tryserver} eq $udom) {
588: my $idlist=join('&',@ids);
589: $idlist=~tr/A-Z/a-z/;
590: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
591: my @answer=();
1.76 www 592: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
1.70 www 593: @answer=split(/\&/,$reply);
594: } ;
595: my $i;
596: for ($i=0;$i<=$#ids;$i++) {
597: if ($answer[$i]) {
598: $returnhash{$ids[$i]}=$answer[$i];
599: }
600: }
601: }
602: }
603: return %returnhash;
604: }
605:
606: # ------------------------------------- Find the IDs behind a list of usernames
607:
608: sub idrget {
609: my ($udom,@unames)=@_;
610: my %returnhash=();
1.191 harris41 611: foreach (@unames) {
1.70 www 612: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
1.191 harris41 613: }
1.70 www 614: return %returnhash;
615: }
616:
617: # ------------------------------- Store away a list of names and associated IDs
618:
619: sub idput {
620: my ($udom,%ids)=@_;
621: my %servers=();
1.191 harris41 622: foreach (keys %ids) {
1.70 www 623: my $uhom=&homeserver($_,$udom);
624: if ($uhom ne 'no_host') {
625: my $id=&escape($ids{$_});
626: $id=~tr/A-Z/a-z/;
627: my $unam=&escape($_);
628: if ($servers{$uhom}) {
629: $servers{$uhom}.='&'.$id.'='.$unam;
630: } else {
631: $servers{$uhom}=$id.'='.$unam;
632: }
633: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
634: }
1.191 harris41 635: }
636: foreach (keys %servers) {
1.70 www 637: &critical('idput:'.$udom.':'.$servers{$_},$_);
1.191 harris41 638: }
1.344 www 639: }
640:
641: # --------------------------------------------------- Assign a key to a student
642:
643: sub assign_access_key {
1.364 www 644: #
645: # a valid key looks like uname:udom#comments
646: # comments are being appended
647: #
648: my ($ckey,$cdom,$cnum,$udom,$uname,$logentry)=@_;
1.344 www 649: $cdom=
650: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
651: $cnum=
652: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
653: $udom=$ENV{'user.name'} unless (defined($udom));
654: $uname=$ENV{'user.domain'} unless (defined($uname));
1.345 www 655: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1.364 www 656: if (($existing{$ckey}=~/^\#(.*)$/) || # - new key
657: ($existing{$ckey}=~/^$uname\:$udom\#(.*)$/)) {
658: # assigned to this person
659: # - this should not happen,
1.345 www 660: # unless something went wrong
661: # the first time around
662: # ready to assign
1.364 www 663: $logentry=$1.'; '.$logentry;
664: if (&put('accesskey',{$ckey=>$uname.':'.$udom.'#'.$logentry},
665: $cdom,$cnum) eq 'ok') {
1.345 www 666: # key now belongs to user
1.346 www 667: my $envkey='key.'.$cdom.'_'.$cnum;
1.345 www 668: if (&put('environment',{$envkey => $ckey}) eq 'ok') {
669: &appenv('environment.'.$envkey => $ckey);
670: return 'ok';
671: } else {
672: return
673: 'error: Count not permanently assign key, will need to be re-entered later.';
674: }
675: } else {
676: return 'error: Could not assign key, try again later.';
677: }
1.364 www 678: } elsif (!$existing{$ckey}) {
1.345 www 679: # the key does not exist
680: return 'error: The key does not exist';
681: } else {
682: # the key is somebody else's
683: return 'error: The key is already in use';
684: }
1.344 www 685: }
686:
1.364 www 687: # ------------------------------------------ put an additional comment on a key
688:
689: sub comment_access_key {
690: #
691: # a valid key looks like uname:udom#comments
692: # comments are being appended
693: #
694: my ($ckey,$cdom,$cnum,$logentry)=@_;
695: $cdom=
696: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
697: $cnum=
698: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
699: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
700: if ($existing{$ckey}) {
701: $existing{$ckey}.='; '.$logentry;
702: # ready to assign
1.367 www 703: if (&put('accesskeys',{$ckey=>$existing{$ckey}},
1.364 www 704: $cdom,$cnum) eq 'ok') {
705: return 'ok';
706: } else {
707: return 'error: Count not store comment.';
708: }
709: } else {
710: # the key does not exist
711: return 'error: The key does not exist';
712: }
713: }
714:
1.344 www 715: # ------------------------------------------------------ Generate a set of keys
716:
717: sub generate_access_keys {
1.364 www 718: my ($number,$cdom,$cnum,$logentry)=@_;
1.344 www 719: $cdom=
720: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
721: $cnum=
722: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
1.361 www 723: unless (&allowed('mky',$cdom)) { return 0; }
1.344 www 724: unless (($cdom) && ($cnum)) { return 0; }
725: if ($number>10000) { return 0; }
726: sleep(2); # make sure don't get same seed twice
727: srand(time()^($$+($$<<15))); # from "Programming Perl"
728: my $total=0;
729: for (my $i=1;$i<=$number;$i++) {
730: my $newkey=sprintf("%lx",int(100000*rand)).'-'.
731: sprintf("%lx",int(100000*rand)).'-'.
732: sprintf("%lx",int(100000*rand));
733: $newkey=~s/1/g/g; # folks mix up 1 and l
734: $newkey=~s/0/h/g; # and also 0 and O
735: my %existing=&get('accesskeys',[$newkey],$cdom,$cnum);
736: if ($existing{$newkey}) {
737: $i--;
738: } else {
1.364 www 739: if (&put('accesskeys',
740: { $newkey => '# generated '.localtime().
741: ' by '.$ENV{'user.name'}.'@'.$ENV{'user.domain'}.
742: '; '.$logentry },
743: $cdom,$cnum) eq 'ok') {
1.344 www 744: $total++;
745: }
746: }
747: }
748: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
749: 'Generated '.$total.' keys for '.$cnum.' at '.$cdom);
750: return $total;
751: }
752:
753: # ------------------------------------------------------- Validate an accesskey
754:
755: sub validate_access_key {
756: my ($ckey,$cdom,$cnum,$udom,$uname)=@_;
757: $cdom=
758: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'} unless (defined($cdom));
759: $cnum=
760: $ENV{'course.'.$ENV{'request.course.id'}.'.num'} unless (defined($cnum));
761: $udom=$ENV{'user.name'} unless (defined($udom));
762: $uname=$ENV{'user.domain'} unless (defined($uname));
1.345 www 763: my %existing=&get('accesskeys',[$ckey],$cdom,$cnum);
1.364 www 764: return ($existing{$ckey}=~/^$uname\:$udom\#/);
1.70 www 765: }
766:
767: # ------------------------------------- Find the section of student in a course
1.298 matthew 768:
769: sub getsection {
770: my ($udom,$unam,$courseid)=@_;
771: $courseid=~s/\_/\//g;
772: $courseid=~s/^(\w)/\/$1/;
773: my %Pending;
774: my %Expired;
775: #
776: # Each role can either have not started yet (pending), be active,
777: # or have expired.
778: #
779: # If there is an active role, we are done.
780: #
781: # If there is more than one role which has not started yet,
782: # choose the one which will start sooner
783: # If there is one role which has not started yet, return it.
784: #
785: # If there is more than one expired role, choose the one which ended last.
786: # If there is a role which has expired, return it.
787: #
788: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
789: &homeserver($unam,$udom)))) {
790: my ($key,$value)=split(/\=/,$_);
791: $key=&unescape($key);
792: next if ($key !~/^$courseid(?:\/)*(\w+)*\_st$/);
793: my $section=$1;
794: if ($key eq $courseid.'_st') { $section=''; }
795: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
796: my $now=time;
797: if (defined($end) && ($now > $end)) {
798: $Expired{$end}=$section;
799: next;
800: }
801: if (defined($start) && ($now < $start)) {
802: $Pending{$start}=$section;
803: next;
804: }
805: return $section;
806: }
807: #
808: # Presumedly there will be few matching roles from the above
809: # loop and the sorting time will be negligible.
810: if (scalar(keys(%Pending))) {
811: my ($time) = sort {$a <=> $b} keys(%Pending);
812: return $Pending{$time};
813: }
814: if (scalar(keys(%Expired))) {
815: my @sorted = sort {$a <=> $b} keys(%Expired);
816: my $time = pop(@sorted);
817: return $Expired{$time};
818: }
819: return '-1';
820: }
1.70 www 821:
1.416 albertel 822: sub devalidate_cache {
1.428 albertel 823: my ($cache,$id,$name) = @_;
1.417 albertel 824: delete $$cache{$id.'.time'};
825: delete $$cache{$id};
1.428 albertel 826: my $filename=$perlvar{'lonDaemons'}.'/tmp/'.$name.".db";
827: open(DB,"$filename.lock");
828: flock(DB,LOCK_EX);
829: my %hash;
830: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
831: delete($hash{$id});
832: delete($hash{$id.'.time'});
833: } else {
1.435 ! www 834: &logthis("Unable to tie hash (devalidate cache): $name");
1.428 albertel 835: }
836: untie(%hash);
837: flock(DB,LOCK_UN);
838: close(DB);
1.416 albertel 839: }
840:
841: sub is_cached {
1.425 albertel 842: my ($cache,$id,$name,$time) = @_;
1.420 albertel 843: if (!$time) { $time=300; }
1.416 albertel 844: if (!exists($$cache{$id.'.time'})) {
1.428 albertel 845: &load_cache_item($cache,$name,$id);
1.425 albertel 846: }
847: if (!exists($$cache{$id.'.time'})) {
848: # &logthis("Didn't find $id");
1.417 albertel 849: return (undef,undef);
1.416 albertel 850: } else {
1.425 albertel 851: if (time-($$cache{$id.'.time'})>$time) {
1.435 ! www 852: # &logthis("Devalidating $id - ".time-($$cache{$id.'.time'}));
1.428 albertel 853: &devalidate_cache($cache,$id,$name);
1.417 albertel 854: return (undef,undef);
1.416 albertel 855: }
856: }
1.417 albertel 857: return ($$cache{$id},1);
1.416 albertel 858: }
859:
860: sub do_cache {
1.425 albertel 861: my ($cache,$id,$value,$name) = @_;
1.416 albertel 862: $$cache{$id.'.time'}=time;
1.425 albertel 863: $$cache{$id}=$value;
1.428 albertel 864: # &logthis("Caching $id as :$value:");
865: &save_cache_item($cache,$name,$id);
1.416 albertel 866: # do_cache implictly return the set value
1.425 albertel 867: $$cache{$id};
868: }
869:
870: sub save_cache {
871: my ($cache,$name)=@_;
1.428 albertel 872: my $starttime=&Time::HiRes::time();
1.425 albertel 873: # &logthis("Saving :$name:");
874: eval lock_store($cache,$perlvar{'lonDaemons'}.'/tmp/'.$name.".storable");
875: if ($@) { &logthis("lock_store threw a die ".$@); }
876: # &logthis("save_cache took ".(&Time::HiRes::time()-$starttime));
877: }
878:
879: sub load_cache {
880: my ($cache,$name)=@_;
1.428 albertel 881: my $starttime=&Time::HiRes::time();
1.425 albertel 882: # &logthis("Before Loading $name size is ".scalar(%$cache));
883: my $tmpcache;
884: eval {
885: $tmpcache=lock_retrieve($perlvar{'lonDaemons'}.'/tmp/'.$name.".storable");
886: };
887: if ($@) { &logthis("lock_retreive threw a die ".$@); return; }
888: if (!%$cache) {
889: my $count;
890: while (my ($key,$value)=each(%$tmpcache)) {
891: $count++;
892: $$cache{$key}=$value;
893: }
894: # &logthis("Initial load: $count");
895: } else {
896: my $key;
897: my $count;
898: while ($key=each(%$tmpcache)) {
899: if ($key !~/^(.*)\.time$/) { next; }
900: my $name=$1;
901: if (exists($$cache{$key})) {
902: if ($$tmpcache{$key} >= $$cache{$key}) {
903: $$cache{$key}=$$tmpcache{$key};
904: $$cache{$name}=$$tmpcache{$name};
905: } else {
906: # &logthis("Would have overwritten $name with is set to expire at ".$$cache{$key}." with ".$$tmpcache{$key}." Whew!");
907: }
908: } else {
909: $count++;
910: $$cache{$key}=$$tmpcache{$key};
911: $$cache{$name}=$$tmpcache{$name};
912: }
913: }
914: # &logthis("Additional load: $count");
915: }
916: # &logthis("After Loading $name size is ".scalar(%$cache));
917: # &logthis("load_cache took ".(&Time::HiRes::time()-$starttime));
1.416 albertel 918: }
919:
1.428 albertel 920: sub save_cache_item {
921: my ($cache,$name,$id)=@_;
922: my $starttime=&Time::HiRes::time();
923: # &logthis("Saving :$name:$id");
924: my %hash;
925: my $filename=$perlvar{'lonDaemons'}.'/tmp/'.$name.".db";
926: open(DB,"$filename.lock");
927: flock(DB,LOCK_EX);
928: if (tie(%hash,'GDBM_File',$filename,&GDBM_WRCREAT(),0640)) {
929: $hash{$id.'.time'}=$$cache{$id.'.time'};
930: $hash{$id}=freeze({'item'=>$$cache{$id}});
931: } else {
1.435 ! www 932: &logthis("Unable to tie hash (save cache item): $name");
1.428 albertel 933: }
934: untie(%hash);
935: flock(DB,LOCK_UN);
936: close(DB);
937: # &logthis("save_cache_item $name took ".(&Time::HiRes::time()-$starttime));
938: }
939:
940: sub load_cache_item {
941: my ($cache,$name,$id)=@_;
942: my $starttime=&Time::HiRes::time();
943: # &logthis("Before Loading $name for $id size is ".scalar(%$cache));
944: my %hash;
945: my $filename=$perlvar{'lonDaemons'}.'/tmp/'.$name.".db";
946: open(DB,"$filename.lock");
947: flock(DB,LOCK_SH);
948: if (tie(%hash,'GDBM_File',$filename,&GDBM_READER(),0640)) {
949: if (!%$cache) {
950: my $count;
951: while (my ($key,$value)=each(%hash)) {
952: $count++;
953: if ($key =~ /\.time$/) {
954: $$cache{$key}=$value;
955: } else {
956: my $hashref=thaw($value);
957: $$cache{$key}=$hashref->{'item'};
958: }
959: }
960: # &logthis("Initial load: $count");
961: } else {
962: my $hashref=thaw($hash{$id});
963: $$cache{$id}=$hashref->{'item'};
964: $$cache{$id.'.time'}=$hash{$id.'.time'};
965: }
966: } else {
1.435 ! www 967: &logthis("Unable to tie hash (load cache item): $name");
1.428 albertel 968: }
969: untie(%hash);
970: flock(DB,LOCK_UN);
971: close(DB);
972: # &logthis("After Loading $name size is ".scalar(%$cache));
973: # &logthis("load_cache_item $name took ".(&Time::HiRes::time()-$starttime));
974: }
975:
1.70 www 976: sub usection {
977: my ($udom,$unam,$courseid)=@_;
1.416 albertel 978: my $hashid="$udom:$unam:$courseid";
979:
1.425 albertel 980: my ($result,$cached)=&is_cached(\%usectioncache,$hashid,'usection');
1.417 albertel 981: if (defined($cached)) { return $result; }
1.70 www 982: $courseid=~s/\_/\//g;
983: $courseid=~s/^(\w)/\/$1/;
1.191 harris41 984: foreach (split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
985: &homeserver($unam,$udom)))) {
1.70 www 986: my ($key,$value)=split(/\=/,$_);
987: $key=&unescape($key);
988: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
989: my $section=$1;
990: if ($key eq $courseid.'_st') { $section=''; }
991: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
992: my $now=time;
993: my $notactive=0;
994: if ($start) {
995: if ($now<$start) { $notactive=1; }
996: }
997: if ($end) {
998: if ($now>$end) { $notactive=1; }
999: }
1.416 albertel 1000: unless ($notactive) {
1.425 albertel 1001: return &do_cache(\%usectioncache,$hashid,$section,'usection');
1.416 albertel 1002: }
1.70 www 1003: }
1.191 harris41 1004: }
1.425 albertel 1005: return &do_cache(\%usectioncache,$hashid,'-1','usection');
1.70 www 1006: }
1007:
1008: # ------------------------------------- Read an entry from a user's environment
1009:
1010: sub userenvironment {
1011: my ($udom,$unam,@what)=@_;
1012: my %returnhash=();
1013: my @answer=split(/\&/,
1014: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
1015: &homeserver($unam,$udom)));
1016: my $i;
1017: for ($i=0;$i<=$#what;$i++) {
1018: $returnhash{$what[$i]}=&unescape($answer[$i]);
1019: }
1020: return %returnhash;
1.1 albertel 1021: }
1022:
1.263 www 1023: # -------------------------------------------------------------------- New chat
1024:
1025: sub chatsend {
1026: my ($newentry,$anon)=@_;
1027: my $cnum=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1028: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1029: my $chome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1030: &reply('chatsend:'.$cdom.':'.$cnum.':'.
1031: &escape($ENV{'user.domain'}.':'.$ENV{'user.name'}.':'.$anon.':'.
1032: &escape($newentry)),$chome);
1.292 www 1033: }
1034:
1035: # ------------------------------------------ Find current version of a resource
1036:
1037: sub getversion {
1038: my $fname=&clutter(shift);
1039: unless ($fname=~/^\/res\//) { return -1; }
1040: return ¤tversion(&filelocation('',$fname));
1041: }
1042:
1043: sub currentversion {
1044: my $fname=shift;
1045: my $author=$fname;
1046: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1047: my ($udom,$uname)=split(/\//,$author);
1048: my $home=homeserver($uname,$udom);
1049: if ($home eq 'no_host') {
1050: return -1;
1051: }
1052: my $answer=reply("currentversion:$fname",$home);
1053: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1054: return -1;
1055: }
1056: return $answer;
1.263 www 1057: }
1058:
1.1 albertel 1059: # ----------------------------- Subscribe to a resource, return URL if possible
1.11 www 1060:
1.1 albertel 1061: sub subscribe {
1062: my $fname=shift;
1.312 www 1063: if ($fname=~/\/(aboutme|syllabus|bulletinboard|smppg)$/) { return ''; }
1.1 albertel 1064: my $author=$fname;
1065: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1066: my ($udom,$uname)=split(/\//,$author);
1067: my $home=homeserver($uname,$udom);
1.335 albertel 1068: if ($home eq 'no_host') {
1069: return 'not_found';
1.1 albertel 1070: }
1071: my $answer=reply("sub:$fname",$home);
1.64 www 1072: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
1073: $answer.=' by '.$home;
1074: }
1.1 albertel 1075: return $answer;
1076: }
1077:
1.8 www 1078: # -------------------------------------------------------------- Replicate file
1079:
1080: sub repcopy {
1081: my $filename=shift;
1.23 www 1082: $filename=~s/\/+/\//g;
1.214 www 1083: if ($filename=~/^\/home\/httpd\/html\/adm\//) { return OK; }
1.8 www 1084: my $transname="$filename.in.transfer";
1.17 www 1085: if ((-e $filename) || (-e $transname)) { return OK; }
1.8 www 1086: my $remoteurl=subscribe($filename);
1.64 www 1087: if ($remoteurl =~ /^con_lost by/) {
1088: &logthis("Subscribe returned $remoteurl: $filename");
1.8 www 1089: return HTTP_SERVICE_UNAVAILABLE;
1090: } elsif ($remoteurl eq 'not_found') {
1091: &logthis("Subscribe returned not_found: $filename");
1092: return HTTP_NOT_FOUND;
1.64 www 1093: } elsif ($remoteurl =~ /^rejected by/) {
1094: &logthis("Subscribe returned $remoteurl: $filename");
1.8 www 1095: return FORBIDDEN;
1.20 www 1096: } elsif ($remoteurl eq 'directory') {
1097: return OK;
1.8 www 1098: } else {
1.290 www 1099: my $author=$filename;
1100: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
1101: my ($udom,$uname)=split(/\//,$author);
1102: my $home=homeserver($uname,$udom);
1103: unless ($home eq $perlvar{'lonHostID'}) {
1.8 www 1104: my @parts=split(/\//,$filename);
1105: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
1106: if ($path ne "$perlvar{'lonDocRoot'}/res") {
1107: &logthis("Malconfiguration for replication: $filename");
1108: return HTTP_BAD_REQUEST;
1109: }
1110: my $count;
1111: for ($count=5;$count<$#parts;$count++) {
1112: $path.="/$parts[$count]";
1113: if ((-e $path)!=1) {
1114: mkdir($path,0777);
1115: }
1116: }
1117: my $ua=new LWP::UserAgent;
1118: my $request=new HTTP::Request('GET',"$remoteurl");
1119: my $response=$ua->request($request,$transname);
1120: if ($response->is_error()) {
1121: unlink($transname);
1122: my $message=$response->status_line;
1.12 www 1123: &logthis("<font color=blue>WARNING:"
1124: ." LWP get: $message: $filename</font>");
1.8 www 1125: return HTTP_SERVICE_UNAVAILABLE;
1126: } else {
1.16 www 1127: if ($remoteurl!~/\.meta$/) {
1128: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
1129: my $mresponse=$ua->request($mrequest,$filename.'.meta');
1130: if ($mresponse->is_error()) {
1131: unlink($filename.'.meta');
1132: &logthis(
1133: "<font color=yellow>INFO: No metadata: $filename</font>");
1134: }
1135: }
1.8 www 1136: rename($transname,$filename);
1137: return OK;
1138: }
1.290 www 1139: }
1.8 www 1140: }
1.330 www 1141: }
1142:
1143: # ------------------------------------------------ Get server side include body
1144: sub ssi_body {
1.381 albertel 1145: my ($filelink,%form)=@_;
1.330 www 1146: my $output=($filelink=~/^http\:/?&externalssi($filelink):
1.381 albertel 1147: &ssi($filelink,%form));
1.330 www 1148: $output=~s/^.*\<body[^\>]*\>//si;
1149: $output=~s/\<\/body\s*\>.*$//si;
1.331 www 1150: $output=~
1151: s/\/\/ BEGIN LON\-CAPA Internal.+\/\/ END LON\-CAPA Internal\s//gs;
1.330 www 1152: return $output;
1.8 www 1153: }
1154:
1.15 www 1155: # --------------------------------------------------------- Server Side Include
1156:
1157: sub ssi {
1158:
1.23 www 1159: my ($fn,%form)=@_;
1.15 www 1160:
1161: my $ua=new LWP::UserAgent;
1.23 www 1162:
1163: my $request;
1164:
1165: if (%form) {
1166: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
1.201 albertel 1167: $request->content(join('&',map { &escape($_).'='.&escape($form{$_}) } keys %form));
1.23 www 1168: } else {
1169: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
1170: }
1171:
1.15 www 1172: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
1173: my $response=$ua->request($request);
1174:
1.324 www 1175: return $response->content;
1176: }
1177:
1178: sub externalssi {
1179: my ($url)=@_;
1180: my $ua=new LWP::UserAgent;
1181: my $request=new HTTP::Request('GET',$url);
1182: my $response=$ua->request($request);
1.15 www 1183: return $response->content;
1184: }
1.254 www 1185:
1186: # ------- Add a token to a remote URI's query string to vouch for access rights
1187:
1188: sub tokenwrapper {
1189: my $uri=shift;
1.259 www 1190: $uri=~s/^http\:\/\/([^\/]+)//;
1191: $uri=~s/^\///;
1192: $ENV{'user.environment'}=~/\/([^\/]+)\.id/;
1193: my $token=$1;
1194: if ($uri=~/^uploaded\/([^\/]+)\/([^\/]+)\/([^\/]+)(\?\.*)*$/) {
1195: &appenv('userfile.'.$1.'/'.$2.'/'.$3 => $ENV{'request.course.id'});
1196: return 'http://'.$hostname{ &homeserver($2,$1)}.'/'.$uri.
1.304 www 1197: (($uri=~/\?/)?'&':'?').'token='.$token.
1198: '&tokenissued='.$perlvar{'lonHostID'};
1.259 www 1199: } else {
1200: return '/adm/notfound.html';
1201: }
1.254 www 1202: }
1203:
1.257 www 1204: # --------------- Take an uploaded file and put it into the userfiles directory
1.259 www 1205: # input: name of form element, coursedoc=1 means this is for the course
1.257 www 1206: # output: url of file in userspace
1207:
1208: sub userfileupload {
1.259 www 1209: my ($formname,$coursedoc)=@_;
1.257 www 1210: my $fname=$ENV{'form.'.$formname.'.filename'};
1.315 www 1211: # Replace Windows backslashes by forward slashes
1.257 www 1212: $fname=~s/\\/\//g;
1.315 www 1213: # Get rid of everything but the actual filename
1.257 www 1214: $fname=~s/^.*\/([^\/]+)$/$1/;
1.315 www 1215: # Replace spaces by underscores
1216: $fname=~s/\s+/\_/g;
1217: # Replace all other weird characters by nothing
1.317 www 1218: $fname=~s/[^\w\.\-]//g;
1.315 www 1219: # See if there is anything left
1.257 www 1220: unless ($fname) { return 'error: no uploaded file'; }
1221: chop($ENV{'form.'.$formname});
1.258 www 1222: # Create the directory if not present
1.259 www 1223: my $docuname='';
1224: my $docudom='';
1225: my $docuhome='';
1226: if ($coursedoc) {
1227: $docuname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1228: $docudom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1229: $docuhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1230: } else {
1231: $docuname=$ENV{'user.name'};
1232: $docudom=$ENV{'user.domain'};
1233: $docuhome=$ENV{'user.home'};
1234: }
1.271 www 1235: return
1236: &finishuserfileupload($docuname,$docudom,$docuhome,$formname,$fname);
1237: }
1238:
1239: sub finishuserfileupload {
1240: my ($docuname,$docudom,$docuhome,$formname,$fname)=@_;
1.259 www 1241: my $path=$docudom.'/'.$docuname.'/';
1.258 www 1242: my $filepath=$perlvar{'lonDocRoot'};
1.259 www 1243: my @parts=split(/\//,$filepath.'/userfiles/'.$path);
1.258 www 1244: my $count;
1245: for ($count=4;$count<=$#parts;$count++) {
1246: $filepath.="/$parts[$count]";
1247: if ((-e $filepath)!=1) {
1248: mkdir($filepath,0777);
1249: }
1250: }
1251: # Save the file
1252: {
1253: my $fh=Apache::File->new('>'.$filepath.'/'.$fname);
1254: print $fh $ENV{'form.'.$formname};
1255: }
1.259 www 1256: # Notify homeserver to grep it
1257: #
1.295 www 1258:
1259: my $fetchresult=
1260: &reply('fetchuserfile:'.$docudom.'/'.$docuname.'/'.$fname,$docuhome);
1261: if ($fetchresult eq 'ok') {
1.259 www 1262: #
1.258 www 1263: # Return the URL to it
1.263 www 1264: return '/uploaded/'.$path.$fname;
1265: } else {
1.295 www 1266: &logthis('Failed to transfer '.$docudom.'/'.$docuname.'/'.$fname.
1267: ' to host '.$docuhome.': '.$fetchresult);
1.263 www 1268: return '/adm/notfound.html';
1269: }
1.257 www 1270: }
1.15 www 1271:
1.14 www 1272: # ------------------------------------------------------------------------- Log
1273:
1274: sub log {
1275: my ($dom,$nam,$hom,$what)=@_;
1.47 www 1276: return critical("log:$dom:$nam:$what",$hom);
1.157 www 1277: }
1278:
1279: # ------------------------------------------------------------------ Course Log
1.352 www 1280: #
1281: # This routine flushes several buffers of non-mission-critical nature
1282: #
1.157 www 1283:
1284: sub flushcourselogs {
1.352 www 1285: &logthis('Flushing log buffers');
1286: #
1287: # course logs
1288: # This is a log of all transactions in a course, which can be used
1289: # for data mining purposes
1290: #
1291: # It also collects the courseid database, which lists last transaction
1292: # times and course titles for all courseids
1293: #
1294: my %courseidbuffer=();
1.191 harris41 1295: foreach (keys %courselogs) {
1.157 www 1296: my $crsid=$_;
1.352 www 1297: if (&reply('log:'.$coursedombuf{$crsid}.':'.$coursenumbuf{$crsid}.':'.
1.188 www 1298: &escape($courselogs{$crsid}),
1299: $coursehombuf{$crsid}) eq 'ok') {
1.157 www 1300: delete $courselogs{$crsid};
1301: } else {
1302: &logthis('Failed to flush log buffer for '.$crsid);
1303: if (length($courselogs{$crsid})>40000) {
1304: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
1305: " exceeded maximum size, deleting.</font>");
1306: delete $courselogs{$crsid};
1307: }
1.352 www 1308: }
1309: if ($courseidbuffer{$coursehombuf{$crsid}}) {
1310: $courseidbuffer{$coursehombuf{$crsid}}.='&'.
1311: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1312: } else {
1313: $courseidbuffer{$coursehombuf{$crsid}}=
1314: &escape($crsid).'='.&escape($coursedescrbuf{$crsid});
1315: }
1.191 harris41 1316: }
1.352 www 1317: #
1318: # Write course id database (reverse lookup) to homeserver of courses
1319: # Is used in pickcourse
1320: #
1321: foreach (keys %courseidbuffer) {
1.353 www 1322: &courseidput($hostdom{$_},$courseidbuffer{$_},$_);
1.352 www 1323: }
1324: #
1325: # File accesses
1326: # Writes to the dynamic metadata of resources to get hit counts, etc.
1327: #
1.191 harris41 1328: foreach (keys %accesshash) {
1.185 www 1329: my $entry=$_;
1330: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
1331: my %temphash=($entry => $accesshash{$entry});
1.266 albertel 1332: if (&Apache::lonnet::put('nohist_resevaldata',\%temphash,$1,$2) eq 'ok') {
1.185 www 1333: delete $accesshash{$entry};
1334: }
1.191 harris41 1335: }
1.352 www 1336: #
1337: # Roles
1338: # Reverse lookup of user roles for course faculty/staff and co-authorship
1339: #
1.349 www 1340: foreach (keys %userrolehash) {
1341: my $entry=$_;
1.351 www 1342: my ($role,$uname,$udom,$runame,$rudom,$rsec)=
1.349 www 1343: split(/\:/,$entry);
1344: if (&Apache::lonnet::put('nohist_userroles',
1.351 www 1345: { $role.':'.$uname.':'.$udom.':'.$rsec => $userrolehash{$entry} },
1.349 www 1346: $rudom,$runame) eq 'ok') {
1347: delete $userrolehash{$entry};
1348: }
1349: }
1.186 www 1350: $dumpcount++;
1.157 www 1351: }
1352:
1353: sub courselog {
1354: my $what=shift;
1.158 www 1355: $what=time.':'.$what;
1.157 www 1356: unless ($ENV{'request.course.id'}) { return ''; }
1.188 www 1357: $coursedombuf{$ENV{'request.course.id'}}=
1.352 www 1358: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
1359: $coursenumbuf{$ENV{'request.course.id'}}=
1.188 www 1360: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
1361: $coursehombuf{$ENV{'request.course.id'}}=
1362: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1.352 www 1363: $coursedescrbuf{$ENV{'request.course.id'}}=
1364: $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
1.157 www 1365: if (defined $courselogs{$ENV{'request.course.id'}}) {
1366: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
1367: } else {
1368: $courselogs{$ENV{'request.course.id'}}.=$what;
1369: }
1370: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
1371: &flushcourselogs();
1372: }
1.158 www 1373: }
1374:
1375: sub courseacclog {
1376: my $fnsymb=shift;
1377: unless ($ENV{'request.course.id'}) { return ''; }
1378: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
1.408 www 1379: if ($fnsymb=~/(problem|exam|quiz|assess|survey|form|page)$/) {
1.187 www 1380: $what.=':POST';
1.191 harris41 1381: foreach (keys %ENV) {
1.158 www 1382: if ($_=~/^form\.(.*)/) {
1383: $what.=':'.$1.'='.$ENV{$_};
1384: }
1.191 harris41 1385: }
1.158 www 1386: }
1387: &courselog($what);
1.149 www 1388: }
1389:
1.185 www 1390: sub countacc {
1391: my $url=&declutter(shift);
1392: unless ($ENV{'request.course.id'}) { return ''; }
1393: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
1.281 www 1394: my $key=$$.$processmarker.'_'.$dumpcount.'___'.$url.'___count';
1.185 www 1395: if (defined($accesshash{$key})) {
1396: $accesshash{$key}++;
1397: } else {
1398: $accesshash{$key}=1;
1399: }
1400: }
1.349 www 1401:
1.361 www 1402: sub linklog {
1403: my ($from,$to)=@_;
1404: $from=&declutter($from);
1405: $to=&declutter($to);
1406: $accesshash{$from.'___'.$to.'___comefrom'}=1;
1407: $accesshash{$to.'___'.$from.'___goto'}=1;
1408: }
1409:
1.349 www 1410: sub userrolelog {
1411: my ($trole,$username,$domain,$area,$tstart,$tend)=@_;
1412: if (($trole=~/^ca/) || ($trole=~/^in/) ||
1413: ($trole=~/^cc/) || ($trole=~/^ep/) ||
1414: ($trole=~/^cr/)) {
1.350 www 1415: my (undef,$rudom,$runame,$rsec)=split(/\//,$area);
1416: $userrolehash
1417: {$trole.':'.$username.':'.$domain.':'.$runame.':'.$rudom.':'.$rsec}
1.349 www 1418: =$tend.':'.$tstart;
1419: }
1.351 www 1420: }
1421:
1422: sub get_course_adv_roles {
1423: my $cid=shift;
1424: $cid=$ENV{'request.course.id'} unless (defined($cid));
1425: my %coursehash=&coursedescription($cid);
1426: my %returnhash=();
1427: my %dumphash=
1428: &dump('nohist_userroles',$coursehash{'domain'},$coursehash{'num'});
1429: my $now=time;
1430: foreach (keys %dumphash) {
1431: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1432: if (($tstart) && ($tstart<0)) { next; }
1433: if (($tend) && ($tend<$now)) { next; }
1434: if (($tstart) && ($now<$tstart)) { next; }
1435: my ($role,$username,$domain,$section)=split(/\:/,$_);
1436: my $key=&plaintext($role);
1437: if ($section) { $key.=' (Sec/Grp '.$section.')'; }
1438: if ($returnhash{$key}) {
1439: $returnhash{$key}.=','.$username.':'.$domain;
1440: } else {
1441: $returnhash{$key}=$username.':'.$domain;
1442: }
1.400 www 1443: }
1444: return %returnhash;
1445: }
1446:
1447: sub get_my_roles {
1448: my ($uname,$udom)=@_;
1449: unless (defined($uname)) { $uname=$ENV{'user.name'}; }
1450: unless (defined($udom)) { $udom=$ENV{'user.domain'}; }
1451: my %dumphash=
1452: &dump('nohist_userroles',$udom,$uname);
1453: my %returnhash=();
1454: my $now=time;
1455: foreach (keys %dumphash) {
1456: my ($tend,$tstart)=split(/\:/,$dumphash{$_});
1457: if (($tstart) && ($tstart<0)) { next; }
1458: if (($tend) && ($tend<$now)) { next; }
1459: if (($tstart) && ($now<$tstart)) { next; }
1460: my ($role,$username,$domain,$section)=split(/\:/,$_);
1461: $returnhash{$username.':'.$domain.':'.$role}=$tstart.':'.$tend;
1.373 www 1462: }
1463: return %returnhash;
1.399 www 1464: }
1465:
1466: # ----------------------------------------------------- Frontpage Announcements
1467: #
1468: #
1469:
1470: sub postannounce {
1471: my ($server,$text)=@_;
1472: unless (&allowed('psa',$hostdom{$server})) { return 'refused'; }
1473: unless ($text=~/\w/) { $text=''; }
1474: return &reply('setannounce:'.&escape($text),$server);
1475: }
1476:
1477: sub getannounce {
1478: if (my $fh=Apache::File->new($perlvar{'lonDocRoot'}.'/announcement.txt')) {
1479: my $announcement='';
1480: while (<$fh>) { $announcement .=$_; }
1481: $fh->close();
1482: if ($announcement=~/\w/) {
1483: return
1484: '<table bgcolor="#FF5555" cellpadding="5" cellspacing="3">'.
1485: '<tr><td bgcolor="#FFFFFF"><pre>'.$announcement.'</pre></td></tr></table>';
1486: } else {
1487: return '';
1488: }
1489: } else {
1490: return '';
1491: }
1.351 www 1492: }
1.353 www 1493:
1494: # ---------------------------------------------------------- Course ID routines
1495: # Deal with domain's nohist_courseid.db files
1496: #
1497:
1498: sub courseidput {
1499: my ($domain,$what,$coursehome)=@_;
1500: return &reply('courseidput:'.$domain.':'.$what,$coursehome);
1501: }
1502:
1503: sub courseiddump {
1504: my ($domfilter,$descfilter,$sincefilter)=@_;
1505: my %returnhash=();
1.355 www 1506: unless ($domfilter) { $domfilter=''; }
1.353 www 1507: foreach my $tryserver (keys %libserv) {
1.355 www 1508: if ((!$domfilter) || ($hostdom{$tryserver} eq $domfilter)) {
1.353 www 1509: foreach (
1510: split(/\&/,&reply('courseiddump:'.$hostdom{$tryserver}.':'.
1.354 www 1511: $sincefilter.':'.&escape($descfilter),
1512: $tryserver))) {
1.353 www 1513: my ($key,$value)=split(/\=/,$_);
1514: if (($key) && ($value)) {
1515: $returnhash{&unescape($key)}=&unescape($value);
1516: }
1517: }
1518:
1519: }
1520: }
1521: return %returnhash;
1522: }
1523:
1524: #
1.149 www 1525: # ----------------------------------------------------------- Check out an item
1526:
1527: sub checkout {
1528: my ($symb,$tuname,$tudom,$tcrsid)=@_;
1529: my $now=time;
1530: my $lonhost=$perlvar{'lonHostID'};
1531: my $infostr=&escape(
1.234 www 1532: 'CHECKOUTTOKEN&'.
1.149 www 1533: $tuname.'&'.
1534: $tudom.'&'.
1535: $tcrsid.'&'.
1536: $symb.'&'.
1537: $now.'&'.$ENV{'REMOTE_ADDR'});
1538: my $token=&reply('tmpput:'.$infostr,$lonhost);
1.151 www 1539: if ($token=~/^error\:/) {
1540: &logthis("<font color=blue>WARNING: ".
1541: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
1542: "</font>");
1543: return '';
1544: }
1545:
1.149 www 1546: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
1547: $token=~tr/a-z/A-Z/;
1548:
1.153 www 1549: my %infohash=('resource.0.outtoken' => $token,
1550: 'resource.0.checkouttime' => $now,
1551: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
1.149 www 1552:
1553: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1554: return '';
1.151 www 1555: } else {
1556: &logthis("<font color=blue>WARNING: ".
1557: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
1558: "</font>");
1.149 www 1559: }
1560:
1561: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1562: &escape('Checkout '.$infostr.' - '.
1563: $token)) ne 'ok') {
1564: return '';
1.151 www 1565: } else {
1566: &logthis("<font color=blue>WARNING: ".
1567: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
1568: "</font>");
1.149 www 1569: }
1.151 www 1570: return $token;
1.149 www 1571: }
1572:
1573: # ------------------------------------------------------------ Check in an item
1574:
1575: sub checkin {
1576: my $token=shift;
1.150 www 1577: my $now=time;
1578: my ($ta,$tb,$lonhost)=split(/\*/,$token);
1579: $lonhost=~tr/A-Z/a-z/;
1580: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
1581: $dtoken=~s/\W/\_/g;
1.234 www 1582: my ($dummy,$tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
1.150 www 1583: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
1584:
1.154 www 1585: unless (($tuname) && ($tudom)) {
1586: &logthis('Check in '.$token.' ('.$dtoken.') failed');
1587: return '';
1588: }
1589:
1590: unless (&allowed('mgr',$tcrsid)) {
1591: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
1592: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
1593: return '';
1594: }
1595:
1.153 www 1596: my %infohash=('resource.0.intoken' => $token,
1597: 'resource.0.checkintime' => $now,
1598: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
1.150 www 1599:
1600: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
1601: return '';
1602: }
1603:
1604: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
1605: &escape('Checkin - '.$token)) ne 'ok') {
1606: return '';
1607: }
1608:
1609: return ($symb,$tuname,$tudom,$tcrsid);
1.110 www 1610: }
1611:
1612: # --------------------------------------------- Set Expire Date for Spreadsheet
1613:
1614: sub expirespread {
1615: my ($uname,$udom,$stype,$usymb)=@_;
1616: my $cid=$ENV{'request.course.id'};
1617: if ($cid) {
1618: my $now=time;
1619: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
1620: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1621: $ENV{'course.'.$cid.'.num'}.
1622: ':nohist_expirationdates:'.
1623: &escape($key).'='.$now,
1624: $ENV{'course.'.$cid.'.home'})
1625: }
1626: return 'ok';
1.14 www 1627: }
1628:
1.109 www 1629: # ----------------------------------------------------- Devalidate Spreadsheets
1630:
1631: sub devalidate {
1.325 www 1632: my ($symb,$uname,$udom)=@_;
1.109 www 1633: my $cid=$ENV{'request.course.id'};
1634: if ($cid) {
1.391 matthew 1635: # delete the stored spreadsheets for
1636: # - the student level sheet of this user in course's homespace
1637: # - the assessment level sheet for this resource
1638: # for this user in user's homespace
1.325 www 1639: my $key=$uname.':'.$udom.':';
1.109 www 1640: my $status=
1.299 matthew 1641: &del('nohist_calculatedsheets',
1.391 matthew 1642: [$key.'studentcalc:'],
1.133 albertel 1643: $ENV{'course.'.$cid.'.domain'},
1644: $ENV{'course.'.$cid.'.num'})
1645: .' '.
1646: &del('nohist_calculatedsheets_'.$cid,
1.391 matthew 1647: [$key.'assesscalc:'.$symb],$udom,$uname);
1.109 www 1648: unless ($status eq 'ok ok') {
1649: &logthis('Could not devalidate spreadsheet '.
1.325 www 1650: $uname.' at '.$udom.' for '.
1.109 www 1651: $symb.': '.$status);
1.133 albertel 1652: }
1.109 www 1653: }
1654: }
1655:
1.265 albertel 1656: sub get_scalar {
1657: my ($string,$end) = @_;
1658: my $value;
1659: if ($$string =~ s/^([^&]*?)($end)/$2/) {
1660: $value = $1;
1661: } elsif ($$string =~ s/^([^&]*?)&//) {
1662: $value = $1;
1663: }
1664: return &unescape($value);
1665: }
1666:
1667: sub array2str {
1668: my (@array) = @_;
1669: my $result=&arrayref2str(\@array);
1670: $result=~s/^__ARRAY_REF__//;
1671: $result=~s/__END_ARRAY_REF__$//;
1672: return $result;
1673: }
1674:
1.204 albertel 1675: sub arrayref2str {
1676: my ($arrayref) = @_;
1.265 albertel 1677: my $result='__ARRAY_REF__';
1.204 albertel 1678: foreach my $elem (@$arrayref) {
1.265 albertel 1679: if(ref($elem) eq 'ARRAY') {
1680: $result.=&arrayref2str($elem).'&';
1681: } elsif(ref($elem) eq 'HASH') {
1682: $result.=&hashref2str($elem).'&';
1683: } elsif(ref($elem)) {
1684: #print("Got a ref of ".(ref($elem))." skipping.");
1.204 albertel 1685: } else {
1686: $result.=&escape($elem).'&';
1687: }
1688: }
1689: $result=~s/\&$//;
1.265 albertel 1690: $result .= '__END_ARRAY_REF__';
1.204 albertel 1691: return $result;
1692: }
1693:
1.168 albertel 1694: sub hash2str {
1.204 albertel 1695: my (%hash) = @_;
1696: my $result=&hashref2str(\%hash);
1.265 albertel 1697: $result=~s/^__HASH_REF__//;
1698: $result=~s/__END_HASH_REF__$//;
1.204 albertel 1699: return $result;
1700: }
1701:
1702: sub hashref2str {
1703: my ($hashref)=@_;
1.265 albertel 1704: my $result='__HASH_REF__';
1.204 albertel 1705: foreach (keys(%$hashref)) {
1706: if (ref($_) eq 'ARRAY') {
1.265 albertel 1707: $result.=&arrayref2str($_).'=';
1.204 albertel 1708: } elsif (ref($_) eq 'HASH') {
1.265 albertel 1709: $result.=&hashref2str($_).'=';
1.204 albertel 1710: } elsif (ref($_)) {
1.265 albertel 1711: $result.='=';
1712: #print("Got a ref of ".(ref($_))." skipping.");
1.204 albertel 1713: } else {
1.265 albertel 1714: if ($_) {$result.=&escape($_).'=';} else { last; }
1.204 albertel 1715: }
1716:
1.265 albertel 1717: if(ref($hashref->{$_}) eq 'ARRAY') {
1718: $result.=&arrayref2str($hashref->{$_}).'&';
1719: } elsif(ref($hashref->{$_}) eq 'HASH') {
1720: $result.=&hashref2str($hashref->{$_}).'&';
1721: } elsif(ref($hashref->{$_})) {
1722: $result.='&';
1723: #print("Got a ref of ".(ref($hashref->{$_}))." skipping.");
1.204 albertel 1724: } else {
1.265 albertel 1725: $result.=&escape($hashref->{$_}).'&';
1.204 albertel 1726: }
1727: }
1.168 albertel 1728: $result=~s/\&$//;
1.265 albertel 1729: $result .= '__END_HASH_REF__';
1.168 albertel 1730: return $result;
1731: }
1732:
1733: sub str2hash {
1.265 albertel 1734: my ($string)=@_;
1735: my ($hash)=&str2hashref('__HASH_REF__'.$string.'__END_HASH_REF__');
1736: return %$hash;
1737: }
1738:
1739: sub str2hashref {
1.168 albertel 1740: my ($string) = @_;
1.265 albertel 1741:
1742: my %hash;
1743:
1744: if($string !~ /^__HASH_REF__/) {
1745: if (! ($string eq '' || !defined($string))) {
1746: $hash{'error'}='Not hash reference';
1747: }
1748: return (\%hash, $string);
1749: }
1750:
1751: $string =~ s/^__HASH_REF__//;
1752:
1753: while($string !~ /^__END_HASH_REF__/) {
1754: #key
1755: my $key='';
1756: if($string =~ /^__HASH_REF__/) {
1757: ($key, $string)=&str2hashref($string);
1758: if(defined($key->{'error'})) {
1759: $hash{'error'}='Bad data';
1760: return (\%hash, $string);
1761: }
1762: } elsif($string =~ /^__ARRAY_REF__/) {
1763: ($key, $string)=&str2arrayref($string);
1764: if($key->[0] eq 'Array reference error') {
1765: $hash{'error'}='Bad data';
1766: return (\%hash, $string);
1767: }
1768: } else {
1769: $string =~ s/^(.*?)=//;
1.267 albertel 1770: $key=&unescape($1);
1.265 albertel 1771: }
1772: $string =~ s/^=//;
1773:
1774: #value
1775: my $value='';
1776: if($string =~ /^__HASH_REF__/) {
1777: ($value, $string)=&str2hashref($string);
1778: if(defined($value->{'error'})) {
1779: $hash{'error'}='Bad data';
1780: return (\%hash, $string);
1781: }
1782: } elsif($string =~ /^__ARRAY_REF__/) {
1783: ($value, $string)=&str2arrayref($string);
1784: if($value->[0] eq 'Array reference error') {
1785: $hash{'error'}='Bad data';
1786: return (\%hash, $string);
1787: }
1788: } else {
1789: $value=&get_scalar(\$string,'__END_HASH_REF__');
1790: }
1791: $string =~ s/^&//;
1792:
1793: $hash{$key}=$value;
1.204 albertel 1794: }
1.265 albertel 1795:
1796: $string =~ s/^__END_HASH_REF__//;
1797:
1798: return (\%hash, $string);
1.204 albertel 1799: }
1800:
1801: sub str2array {
1.265 albertel 1802: my ($string)=@_;
1803: my ($array)=&str2arrayref('__ARRAY_REF__'.$string.'__END_ARRAY_REF__');
1804: return @$array;
1805: }
1806:
1807: sub str2arrayref {
1.204 albertel 1808: my ($string) = @_;
1.265 albertel 1809: my @array;
1810:
1811: if($string !~ /^__ARRAY_REF__/) {
1812: if (! ($string eq '' || !defined($string))) {
1813: $array[0]='Array reference error';
1814: }
1815: return (\@array, $string);
1816: }
1817:
1818: $string =~ s/^__ARRAY_REF__//;
1819:
1820: while($string !~ /^__END_ARRAY_REF__/) {
1821: my $value='';
1822: if($string =~ /^__HASH_REF__/) {
1823: ($value, $string)=&str2hashref($string);
1824: if(defined($value->{'error'})) {
1825: $array[0] ='Array reference error';
1826: return (\@array, $string);
1827: }
1828: } elsif($string =~ /^__ARRAY_REF__/) {
1829: ($value, $string)=&str2arrayref($string);
1830: if($value->[0] eq 'Array reference error') {
1831: $array[0] ='Array reference error';
1832: return (\@array, $string);
1833: }
1834: } else {
1835: $value=&get_scalar(\$string,'__END_ARRAY_REF__');
1836: }
1837: $string =~ s/^&//;
1838:
1839: push(@array, $value);
1.191 harris41 1840: }
1.265 albertel 1841:
1842: $string =~ s/^__END_ARRAY_REF__//;
1843:
1844: return (\@array, $string);
1.168 albertel 1845: }
1846:
1.167 albertel 1847: # -------------------------------------------------------------------Temp Store
1848:
1.168 albertel 1849: sub tmpreset {
1850: my ($symb,$namespace,$domain,$stuname) = @_;
1851: if (!$symb) {
1852: $symb=&symbread();
1.380 albertel 1853: if (!$symb) { $symb= $ENV{'request.url'}; }
1.168 albertel 1854: }
1855: $symb=escape($symb);
1856:
1857: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1858: $namespace=~s/\//\_/g;
1859: $namespace=~s/\W//g;
1860:
1861: #FIXME needs to do something for /pub resources
1862: if (!$domain) { $domain=$ENV{'user.domain'}; }
1863: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1864: my $path=$perlvar{'lonDaemons'}.'/tmp';
1865: my %hash;
1866: if (tie(%hash,'GDBM_File',
1867: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1.256 albertel 1868: &GDBM_WRCREAT(),0640)) {
1.168 albertel 1869: foreach my $key (keys %hash) {
1.180 albertel 1870: if ($key=~ /:$symb/) {
1.168 albertel 1871: delete($hash{$key});
1872: }
1873: }
1874: }
1875: }
1876:
1.167 albertel 1877: sub tmpstore {
1.168 albertel 1878: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1879:
1880: if (!$symb) {
1881: $symb=&symbread();
1882: if (!$symb) { $symb= $ENV{'request.url'}; }
1883: }
1884: $symb=escape($symb);
1885:
1886: if (!$namespace) {
1887: # I don't think we would ever want to store this for a course.
1888: # it seems this will only be used if we don't have a course.
1889: #$namespace=$ENV{'request.course.id'};
1890: #if (!$namespace) {
1891: $namespace=$ENV{'request.state'};
1892: #}
1893: }
1894: $namespace=~s/\//\_/g;
1895: $namespace=~s/\W//g;
1896: #FIXME needs to do something for /pub resources
1897: if (!$domain) { $domain=$ENV{'user.domain'}; }
1898: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1899: my $now=time;
1900: my %hash;
1901: my $path=$perlvar{'lonDaemons'}.'/tmp';
1902: if (tie(%hash,'GDBM_File',
1903: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1.256 albertel 1904: &GDBM_WRCREAT(),0640)) {
1.168 albertel 1905: $hash{"version:$symb"}++;
1906: my $version=$hash{"version:$symb"};
1907: my $allkeys='';
1908: foreach my $key (keys(%$storehash)) {
1909: $allkeys.=$key.':';
1910: $hash{"$version:$symb:$key"}=$$storehash{$key};
1911: }
1912: $hash{"$version:$symb:timestamp"}=$now;
1913: $allkeys.='timestamp';
1914: $hash{"$version:keys:$symb"}=$allkeys;
1915: if (untie(%hash)) {
1916: return 'ok';
1917: } else {
1918: return "error:$!";
1919: }
1920: } else {
1921: return "error:$!";
1922: }
1923: }
1.167 albertel 1924:
1.168 albertel 1925: # -----------------------------------------------------------------Temp Restore
1.167 albertel 1926:
1.168 albertel 1927: sub tmprestore {
1928: my ($symb,$namespace,$domain,$stuname) = @_;
1.167 albertel 1929:
1.168 albertel 1930: if (!$symb) {
1931: $symb=&symbread();
1932: if (!$symb) { $symb= $ENV{'request.url'}; }
1933: }
1934: $symb=escape($symb);
1935:
1936: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1937: #FIXME needs to do something for /pub resources
1938: if (!$domain) { $domain=$ENV{'user.domain'}; }
1939: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1940:
1941: my %returnhash;
1942: $namespace=~s/\//\_/g;
1943: $namespace=~s/\W//g;
1944: my %hash;
1945: my $path=$perlvar{'lonDaemons'}.'/tmp';
1946: if (tie(%hash,'GDBM_File',
1947: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1.256 albertel 1948: &GDBM_READER(),0640)) {
1.168 albertel 1949: my $version=$hash{"version:$symb"};
1950: $returnhash{'version'}=$version;
1951: my $scope;
1952: for ($scope=1;$scope<=$version;$scope++) {
1953: my $vkeys=$hash{"$scope:keys:$symb"};
1954: my @keys=split(/:/,$vkeys);
1955: my $key;
1956: $returnhash{"$scope:keys"}=$vkeys;
1957: foreach $key (@keys) {
1958: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1959: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1.167 albertel 1960: }
1961: }
1.168 albertel 1962: if (!(untie(%hash))) {
1963: return "error:$!";
1964: }
1965: } else {
1966: return "error:$!";
1967: }
1968: return %returnhash;
1.167 albertel 1969: }
1970:
1.9 www 1971: # ----------------------------------------------------------------------- Store
1972:
1973: sub store {
1.124 www 1974: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1975: my $home='';
1976:
1.168 albertel 1977: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 1978:
1.213 www 1979: $symb=&symbclean($symb);
1.122 albertel 1980: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1.109 www 1981:
1.325 www 1982: if (!$domain) { $domain=$ENV{'user.domain'}; }
1983: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1984:
1985: &devalidate($symb,$stuname,$domain);
1.109 www 1986:
1987: $symb=escape($symb);
1.187 www 1988: if (!$namespace) {
1989: unless ($namespace=$ENV{'request.course.id'}) {
1990: return '';
1991: }
1992: }
1.122 albertel 1993: if (!$home) { $home=$ENV{'user.home'}; }
1.12 www 1994: my $namevalue='';
1.191 harris41 1995: foreach (keys %$storehash) {
1.122 albertel 1996: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 1997: }
1.12 www 1998: $namevalue=~s/\&$//;
1.187 www 1999: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1.124 www 2000: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1.9 www 2001: }
2002:
1.47 www 2003: # -------------------------------------------------------------- Critical Store
2004:
2005: sub cstore {
1.124 www 2006: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
2007: my $home='';
2008:
1.168 albertel 2009: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 2010:
1.213 www 2011: $symb=&symbclean($symb);
1.122 albertel 2012: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1.109 www 2013:
1.325 www 2014: if (!$domain) { $domain=$ENV{'user.domain'}; }
2015: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2016:
2017: &devalidate($symb,$stuname,$domain);
1.109 www 2018:
2019: $symb=escape($symb);
1.187 www 2020: if (!$namespace) {
2021: unless ($namespace=$ENV{'request.course.id'}) {
2022: return '';
2023: }
2024: }
1.122 albertel 2025: if (!$home) { $home=$ENV{'user.home'}; }
2026:
1.47 www 2027: my $namevalue='';
1.191 harris41 2028: foreach (keys %$storehash) {
1.122 albertel 2029: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 2030: }
1.47 www 2031: $namevalue=~s/\&$//;
1.187 www 2032: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1.188 www 2033: return critical
2034: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1.47 www 2035: }
2036:
1.9 www 2037: # --------------------------------------------------------------------- Restore
2038:
2039: sub restore {
1.124 www 2040: my ($symb,$namespace,$domain,$stuname) = @_;
2041: my $home='';
2042:
1.168 albertel 2043: if ($stuname) { $home=&homeserver($stuname,$domain); }
1.124 www 2044:
1.122 albertel 2045: if (!$symb) {
2046: unless ($symb=escape(&symbread())) { return ''; }
2047: } else {
1.213 www 2048: $symb=&escape(&symbclean($symb));
1.122 albertel 2049: }
1.188 www 2050: if (!$namespace) {
2051: unless ($namespace=$ENV{'request.course.id'}) {
2052: return '';
2053: }
2054: }
1.122 albertel 2055: if (!$domain) { $domain=$ENV{'user.domain'}; }
2056: if (!$stuname) { $stuname=$ENV{'user.name'}; }
2057: if (!$home) { $home=$ENV{'user.home'}; }
2058: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
2059:
1.12 www 2060: my %returnhash=();
1.191 harris41 2061: foreach (split(/\&/,$answer)) {
1.12 www 2062: my ($name,$value)=split(/\=/,$_);
2063: $returnhash{&unescape($name)}=&unescape($value);
1.191 harris41 2064: }
1.75 www 2065: my $version;
2066: for ($version=1;$version<=$returnhash{'version'};$version++) {
1.191 harris41 2067: foreach (split(/\:/,$returnhash{$version.':keys'})) {
1.75 www 2068: $returnhash{$_}=$returnhash{$version.':'.$_};
1.191 harris41 2069: }
1.75 www 2070: }
1.13 www 2071: return %returnhash;
1.34 www 2072: }
2073:
2074: # ---------------------------------------------------------- Course Description
2075:
2076: sub coursedescription {
2077: my $courseid=shift;
2078: $courseid=~s/^\///;
1.49 www 2079: $courseid=~s/\_/\//g;
1.34 www 2080: my ($cdomain,$cnum)=split(/\//,$courseid);
1.129 albertel 2081: my $chome=&homeserver($cnum,$cdomain);
1.302 albertel 2082: my $normalid=$cdomain.'_'.$cnum;
2083: # need to always cache even if we get errors otherwise we keep
2084: # trying and trying and trying to get the course description.
2085: my %envhash=();
2086: my %returnhash=();
2087: $envhash{'course.'.$normalid.'.last_cache'}=time;
1.34 www 2088: if ($chome ne 'no_host') {
1.302 albertel 2089: %returnhash=&dump('environment',$cdomain,$cnum);
1.129 albertel 2090: if (!exists($returnhash{'con_lost'})) {
2091: $returnhash{'home'}= $chome;
2092: $returnhash{'domain'} = $cdomain;
2093: $returnhash{'num'} = $cnum;
1.130 albertel 2094: while (my ($name,$value) = each %returnhash) {
1.53 www 2095: $envhash{'course.'.$normalid.'.'.$name}=$value;
1.129 albertel 2096: }
1.270 www 2097: $returnhash{'url'}=&clutter($returnhash{'url'});
1.34 www 2098: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1.38 www 2099: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1.60 www 2100: $envhash{'course.'.$normalid.'.home'}=$chome;
2101: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
2102: $envhash{'course.'.$normalid.'.num'}=$cnum;
1.34 www 2103: }
2104: }
1.302 albertel 2105: &appenv(%envhash);
2106: return %returnhash;
1.9 www 2107: }
1.1 albertel 2108:
1.103 harris41 2109: # -------------------------------------------------------- Get user privileges
1.11 www 2110:
2111: sub rolesinit {
2112: my ($domain,$username,$authhost)=@_;
2113: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1.12 www 2114: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1.11 www 2115: my %allroles=();
2116: my %thesepriv=();
2117: my $now=time;
1.21 www 2118: my $userroles="user.login.time=$now\n";
1.11 www 2119: my $thesestr;
2120:
2121: if ($rolesdump ne '') {
1.191 harris41 2122: foreach (split(/&/,$rolesdump)) {
1.21 www 2123: if ($_!~/^rolesdef\&/) {
1.11 www 2124: my ($area,$role)=split(/=/,$_);
1.21 www 2125: $area=~s/\_\w\w$//;
1.11 www 2126: my ($trole,$tend,$tstart)=split(/_/,$role);
1.21 www 2127: $userroles.='user.role.'.$trole.'.'.$area.'='.
2128: $tstart.'.'.$tend."\n";
1.349 www 2129: # log the associated role with the area
2130: &userrolelog($trole,$username,$domain,$area,$tstart,$tend);
1.11 www 2131: if ($tend!=0) {
2132: if ($tend<$now) {
2133: $trole='';
2134: }
2135: }
2136: if ($tstart!=0) {
2137: if ($tstart>$now) {
2138: $trole='';
2139: }
2140: }
2141: if (($area ne '') && ($trole ne '')) {
1.347 albertel 2142: my $spec=$trole.'.'.$area;
2143: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
2144: if ($trole =~ /^cr\//) {
2145: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1.392 www 2146: my $homsvr=homeserver($rauthor,$rdomain);
1.347 albertel 2147: if ($hostname{$homsvr} ne '') {
1.392 www 2148: my ($rdummy,$roledef)=
2149: &get('roles',["rolesdef_$rrole"],$rdomain,$rauthor);
2150:
2151: if (($rdummy ne 'con_lost') && ($roledef ne '')) {
1.347 albertel 2152: my ($syspriv,$dompriv,$coursepriv)=
1.392 www 2153: split(/\_/,$roledef);
1.347 albertel 2154: if (defined($syspriv)) {
2155: $allroles{'cm./'}.=':'.$syspriv;
2156: $allroles{$spec.'./'}.=':'.$syspriv;
2157: }
2158: if ($tdomain ne '') {
2159: if (defined($dompriv)) {
2160: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
2161: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
2162: }
2163: if ($trest ne '') {
2164: if (defined($coursepriv)) {
2165: $allroles{'cm.'.$area}.=':'.$coursepriv;
2166: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
2167: }
2168: }
2169: }
2170: }
2171: }
2172: } else {
2173: if (defined($pr{$trole.':s'})) {
2174: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
2175: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
2176: }
2177: if ($tdomain ne '') {
2178: if (defined($pr{$trole.':d'})) {
2179: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2180: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
2181: }
2182: if ($trest ne '') {
2183: if (defined($pr{$trole.':c'})) {
2184: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
2185: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
2186: }
2187: }
2188: }
2189: }
1.12 www 2190: }
2191: }
1.191 harris41 2192: }
1.125 www 2193: my $adv=0;
1.128 www 2194: my $author=0;
1.191 harris41 2195: foreach (keys %allroles) {
1.11 www 2196: %thesepriv=();
1.146 www 2197: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1.128 www 2198: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1.191 harris41 2199: foreach (split(/:/,$allroles{$_})) {
1.11 www 2200: if ($_ ne '') {
1.103 harris41 2201: my ($privilege,$restrictions)=split(/&/,$_);
1.11 www 2202: if ($restrictions eq '') {
1.103 harris41 2203: $thesepriv{$privilege}='F';
1.11 www 2204: } else {
1.103 harris41 2205: if ($thesepriv{$privilege} ne 'F') {
2206: $thesepriv{$privilege}.=$restrictions;
1.11 www 2207: }
2208: }
2209: }
1.191 harris41 2210: }
1.11 www 2211: $thesestr='';
1.191 harris41 2212: foreach (keys %thesepriv) { $thesestr.=':'.$_.'&'.$thesepriv{$_}; }
1.11 www 2213: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1.191 harris41 2214: }
1.128 www 2215: $userroles.='user.adv='.$adv."\n".
2216: 'user.author='.$author."\n";
1.126 www 2217: $ENV{'user.adv'}=$adv;
1.11 www 2218: }
2219: return $userroles;
2220: }
2221:
1.12 www 2222: # --------------------------------------------------------------- get interface
2223:
2224: sub get {
1.131 albertel 2225: my ($namespace,$storearr,$udomain,$uname)=@_;
1.12 www 2226: my $items='';
1.191 harris41 2227: foreach (@$storearr) {
1.12 www 2228: $items.=escape($_).'&';
1.191 harris41 2229: }
1.12 www 2230: $items=~s/\&$//;
1.131 albertel 2231: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2232: if (!$uname) { $uname=$ENV{'user.name'}; }
2233: my $uhome=&homeserver($uname,$udomain);
2234:
1.133 albertel 2235: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1.15 www 2236: my @pairs=split(/\&/,$rep);
1.273 albertel 2237: if ( $#pairs==0 && $pairs[0] =~ /^(con_lost|error|no_such_host)/i) {
2238: return @pairs;
2239: }
1.15 www 2240: my %returnhash=();
1.42 www 2241: my $i=0;
1.191 harris41 2242: foreach (@$storearr) {
1.42 www 2243: $returnhash{$_}=unescape($pairs[$i]);
2244: $i++;
1.191 harris41 2245: }
1.15 www 2246: return %returnhash;
1.27 www 2247: }
2248:
2249: # --------------------------------------------------------------- del interface
2250:
2251: sub del {
1.133 albertel 2252: my ($namespace,$storearr,$udomain,$uname)=@_;
1.27 www 2253: my $items='';
1.191 harris41 2254: foreach (@$storearr) {
1.27 www 2255: $items.=escape($_).'&';
1.191 harris41 2256: }
1.27 www 2257: $items=~s/\&$//;
1.133 albertel 2258: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2259: if (!$uname) { $uname=$ENV{'user.name'}; }
2260: my $uhome=&homeserver($uname,$udomain);
2261:
2262: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1.15 www 2263: }
2264:
2265: # -------------------------------------------------------------- dump interface
2266:
2267: sub dump {
1.193 www 2268: my ($namespace,$udomain,$uname,$regexp)=@_;
1.129 albertel 2269: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2270: if (!$uname) { $uname=$ENV{'user.name'}; }
2271: my $uhome=&homeserver($uname,$udomain);
1.193 www 2272: if ($regexp) {
2273: $regexp=&escape($regexp);
2274: } else {
2275: $regexp='.';
2276: }
2277: my $rep=reply("dump:$udomain:$uname:$namespace:$regexp",$uhome);
1.12 www 2278: my @pairs=split(/\&/,$rep);
2279: my %returnhash=();
1.191 harris41 2280: foreach (@pairs) {
1.12 www 2281: my ($key,$value)=split(/=/,$_);
1.29 www 2282: $returnhash{unescape($key)}=unescape($value);
1.318 matthew 2283: }
2284: return %returnhash;
1.407 www 2285: }
2286:
2287: # -------------------------------------------------------------- keys interface
2288:
2289: sub getkeys {
2290: my ($namespace,$udomain,$uname)=@_;
2291: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2292: if (!$uname) { $uname=$ENV{'user.name'}; }
2293: my $uhome=&homeserver($uname,$udomain);
2294: my $rep=reply("keys:$udomain:$uname:$namespace",$uhome);
2295: my @keyarray=();
2296: foreach (split(/\&/,$rep)) {
2297: push (@keyarray,&unescape($_));
2298: }
2299: return @keyarray;
1.318 matthew 2300: }
2301:
1.319 matthew 2302: # --------------------------------------------------------------- currentdump
2303: sub currentdump {
1.328 matthew 2304: my ($courseid,$sdom,$sname)=@_;
1.326 matthew 2305: $courseid = $ENV{'request.course.id'} if (! defined($courseid));
2306: $sdom = $ENV{'user.domain'} if (! defined($sdom));
2307: $sname = $ENV{'user.name'} if (! defined($sname));
2308: my $uhome = &homeserver($sname,$sdom);
2309: my $rep=reply('currentdump:'.$sdom.':'.$sname.':'.$courseid,$uhome);
1.318 matthew 2310: return if ($rep =~ /^(error:|no_such_host)/);
1.319 matthew 2311: #
1.318 matthew 2312: my %returnhash=();
1.319 matthew 2313: #
2314: if ($rep eq "unknown_cmd") {
2315: # an old lond will not know currentdump
2316: # Do a dump and make it look like a currentdump
1.326 matthew 2317: my @tmp = &dump($courseid,$sdom,$sname,'.');
1.319 matthew 2318: return if ($tmp[0] =~ /^(error:|no_such_host)/);
2319: my %hash = @tmp;
2320: @tmp=();
1.424 matthew 2321: %returnhash = %{&convert_dump_to_currentdump(\%hash)};
1.319 matthew 2322: } else {
2323: my @pairs=split(/\&/,$rep);
2324: foreach (@pairs) {
2325: my ($key,$value)=split(/=/,$_);
2326: my ($symb,$param) = split(/:/,$key);
2327: $returnhash{&unescape($symb)}->{&unescape($param)} =
2328: &unescape($value);
2329: }
1.191 harris41 2330: }
1.12 www 2331: return %returnhash;
1.424 matthew 2332: }
2333:
2334: sub convert_dump_to_currentdump{
2335: my %hash = %{shift()};
2336: my %returnhash;
2337: # Code ripped from lond, essentially. The only difference
2338: # here is the unescaping done by lonnet::dump(). Conceivably
2339: # we might run in to problems with parameter names =~ /^v\./
2340: while (my ($key,$value) = each(%hash)) {
2341: my ($v,$symb,$param) = split(/:/,$key);
2342: next if ($v eq 'version' || $symb eq 'keys');
2343: next if (exists($returnhash{$symb}) &&
2344: exists($returnhash{$symb}->{$param}) &&
2345: $returnhash{$symb}->{'v.'.$param} > $v);
2346: $returnhash{$symb}->{$param}=$value;
2347: $returnhash{$symb}->{'v.'.$param}=$v;
2348: }
2349: #
2350: # Remove all of the keys in the hashes which keep track of
2351: # the version of the parameter.
2352: while (my ($symb,$param_hash) = each(%returnhash)) {
2353: # use a foreach because we are going to delete from the hash.
2354: foreach my $key (keys(%$param_hash)) {
2355: delete($param_hash->{$key}) if ($key =~ /^v\./);
2356: }
2357: }
2358: return \%returnhash;
1.12 www 2359: }
2360:
2361: # --------------------------------------------------------------- put interface
2362:
2363: sub put {
1.134 albertel 2364: my ($namespace,$storehash,$udomain,$uname)=@_;
2365: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2366: if (!$uname) { $uname=$ENV{'user.name'}; }
2367: my $uhome=&homeserver($uname,$udomain);
1.12 www 2368: my $items='';
1.191 harris41 2369: foreach (keys %$storehash) {
1.134 albertel 2370: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1.191 harris41 2371: }
1.12 www 2372: $items=~s/\&$//;
1.134 albertel 2373: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1.47 www 2374: }
2375:
2376: # ------------------------------------------------------ critical put interface
2377:
2378: sub cput {
1.134 albertel 2379: my ($namespace,$storehash,$udomain,$uname)=@_;
2380: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2381: if (!$uname) { $uname=$ENV{'user.name'}; }
2382: my $uhome=&homeserver($uname,$udomain);
1.47 www 2383: my $items='';
1.191 harris41 2384: foreach (keys %$storehash) {
1.134 albertel 2385: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1.191 harris41 2386: }
1.47 www 2387: $items=~s/\&$//;
1.134 albertel 2388: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1.12 www 2389: }
2390:
2391: # -------------------------------------------------------------- eget interface
2392:
2393: sub eget {
1.133 albertel 2394: my ($namespace,$storearr,$udomain,$uname)=@_;
1.12 www 2395: my $items='';
1.191 harris41 2396: foreach (@$storearr) {
1.12 www 2397: $items.=escape($_).'&';
1.191 harris41 2398: }
1.12 www 2399: $items=~s/\&$//;
1.133 albertel 2400: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
2401: if (!$uname) { $uname=$ENV{'user.name'}; }
2402: my $uhome=&homeserver($uname,$udomain);
2403: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1.12 www 2404: my @pairs=split(/\&/,$rep);
2405: my %returnhash=();
1.42 www 2406: my $i=0;
1.191 harris41 2407: foreach (@$storearr) {
1.42 www 2408: $returnhash{$_}=unescape($pairs[$i]);
2409: $i++;
1.191 harris41 2410: }
1.12 www 2411: return %returnhash;
2412: }
2413:
1.341 www 2414: # ---------------------------------------------- Custom access rule evaluation
2415:
2416: sub customaccess {
2417: my ($priv,$uri)=@_;
1.342 www 2418: my ($urole,$urealm)=split(/\./,$ENV{'request.role'});
1.343 www 2419: $urealm=~s/^\W//;
2420: my ($udom,$ucrs,$usec)=split(/\//,$urealm);
1.341 www 2421: my $access=0;
2422: foreach (split(/\s*\,\s*/,&metadata($uri,'rule_rights'))) {
1.342 www 2423: my ($effect,$realm,$role)=split(/\:/,$_);
1.343 www 2424: if ($role) {
2425: if ($role ne $urole) { next; }
2426: }
2427: foreach (split(/\s*\,\s*/,$realm)) {
2428: my ($tdom,$tcrs,$tsec)=split(/\_/,$_);
2429: if ($tdom) {
2430: if ($tdom ne $udom) { next; }
2431: }
2432: if ($tcrs) {
2433: if ($tcrs ne $ucrs) { next; }
2434: }
2435: if ($tsec) {
2436: if ($tsec ne $usec) { next; }
2437: }
2438: $access=($effect eq 'allow');
2439: last;
1.342 www 2440: }
1.402 bowersj2 2441: if ($realm eq '' && $role eq '') {
2442: $access=($effect eq 'allow');
2443: }
1.341 www 2444: }
2445: return $access;
2446: }
2447:
1.103 harris41 2448: # ------------------------------------------------- Check for a user privilege
1.12 www 2449:
2450: sub allowed {
2451: my ($priv,$uri)=@_;
1.152 www 2452:
2453: my $orguri=$uri;
1.52 www 2454: $uri=&declutter($uri);
1.29 www 2455:
1.398 albertel 2456: if (defined($ENV{'allowed.'.$priv})) { return $ENV{'allowed.'.$priv}; }
1.54 www 2457: # Free bre access to adm and meta resources
1.29 www 2458:
1.54 www 2459: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1.14 www 2460: return 'F';
1.159 www 2461: }
2462:
2463: # Free bre to public access
2464:
2465: if ($priv eq 'bre') {
1.238 www 2466: my $copyright=&metadata($uri,'copyright');
1.301 www 2467: if (($copyright eq 'public') && (!$ENV{'request.course.id'})) {
2468: return 'F';
2469: }
1.238 www 2470: if ($copyright eq 'priv') {
2471: $uri=~/([^\/]+)\/([^\/]+)\//;
2472: unless (($ENV{'user.name'} eq $2) && ($ENV{'user.domain'} eq $1)) {
2473: return '';
2474: }
2475: }
2476: if ($copyright eq 'domain') {
2477: $uri=~/([^\/]+)\/([^\/]+)\//;
2478: unless (($ENV{'user.domain'} eq $1) ||
2479: ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $1)) {
2480: return '';
2481: }
1.262 matthew 2482: }
2483: if ($ENV{'request.role'}=~ /li\.\//) {
2484: # Library role, so allow browsing of resources in this domain.
2485: return 'F';
1.238 www 2486: }
1.341 www 2487: if ($copyright eq 'custom') {
2488: unless (&customaccess($priv,$uri)) { return ''; }
2489: }
1.14 www 2490: }
1.264 matthew 2491: # Domain coordinator is trying to create a course
2492: if (($priv eq 'ccc') && ($ENV{'request.role'} =~ /^dc\./)) {
2493: # uri is the requested domain in this case.
2494: # comparison to 'request.role.domain' shows if the user has selected
2495: # a role of dc for the domain in question.
2496: return 'F' if ($uri eq $ENV{'request.role.domain'});
2497: }
1.29 www 2498:
1.52 www 2499: my $thisallowed='';
2500: my $statecond=0;
2501: my $courseprivid='';
2502:
2503: # Course
2504:
2505: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
2506: $thisallowed.=$1;
2507: }
1.29 www 2508:
1.52 www 2509: # Domain
2510:
2511: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
2512: =~/$priv\&([^\:]*)/) {
1.12 www 2513: $thisallowed.=$1;
2514: }
1.52 www 2515:
2516: # Course: uri itself is a course
1.66 www 2517: my $courseuri=$uri;
2518: $courseuri=~s/\_(\d)/\/$1/;
1.83 www 2519: $courseuri=~s/^([^\/])/\/$1/;
1.81 www 2520:
1.83 www 2521: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1.52 www 2522: =~/$priv\&([^\:]*)/) {
1.12 www 2523: $thisallowed.=$1;
2524: }
1.29 www 2525:
1.314 www 2526: # URI is an uploaded document for this course
2527:
2528: if (($priv eq 'bre') &&
2529: ($uri=~/^uploaded\/$ENV{'course.'.$ENV{'request.course.id'}.'.domain'}\/$ENV{'course.'.$ENV{'request.course.id'}.'.num'}/)) {
2530: return 'F';
2531: }
1.52 www 2532: # Full access at system, domain or course-wide level? Exit.
1.29 www 2533:
2534: if ($thisallowed=~/F/) {
2535: return 'F';
2536: }
2537:
1.52 www 2538: # If this is generating or modifying users, exit with special codes
1.29 www 2539:
1.166 www 2540: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1.52 www 2541: return $thisallowed;
2542: }
2543: #
1.103 harris41 2544: # Gathered so far: system, domain and course wide privileges
1.52 www 2545: #
2546: # Course: See if uri or referer is an individual resource that is part of
2547: # the course
2548:
2549: if ($ENV{'request.course.id'}) {
1.232 www 2550:
1.52 www 2551: $courseprivid=$ENV{'request.course.id'};
2552: if ($ENV{'request.course.sec'}) {
2553: $courseprivid.='/'.$ENV{'request.course.sec'};
2554: }
2555: $courseprivid=~s/\_/\//;
2556: my $checkreferer=1;
1.232 www 2557: my ($match,$cond)=&is_on_map($uri);
2558: if ($match) {
2559: $statecond=$cond;
1.52 www 2560: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2561: =~/$priv\&([^\:]*)/) {
2562: $thisallowed.=$1;
2563: $checkreferer=0;
2564: }
1.29 www 2565: }
1.83 www 2566:
1.148 www 2567: if ($checkreferer) {
1.152 www 2568: my $refuri=$ENV{'httpref.'.$orguri};
1.148 www 2569: unless ($refuri) {
1.191 harris41 2570: foreach (keys %ENV) {
1.148 www 2571: if ($_=~/^httpref\..*\*/) {
2572: my $pattern=$_;
1.156 www 2573: $pattern=~s/^httpref\.\/res\///;
1.148 www 2574: $pattern=~s/\*/\[\^\/\]\+/g;
2575: $pattern=~s/\//\\\//g;
1.152 www 2576: if ($orguri=~/$pattern/) {
1.148 www 2577: $refuri=$ENV{$_};
2578: }
2579: }
1.191 harris41 2580: }
1.148 www 2581: }
1.232 www 2582:
1.148 www 2583: if ($refuri) {
1.152 www 2584: $refuri=&declutter($refuri);
1.232 www 2585: my ($match,$cond)=&is_on_map($refuri);
2586: if ($match) {
2587: my $refstatecond=$cond;
1.52 www 2588: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
2589: =~/$priv\&([^\:]*)/) {
2590: $thisallowed.=$1;
1.53 www 2591: $uri=$refuri;
2592: $statecond=$refstatecond;
1.52 www 2593: }
2594: }
1.148 www 2595: }
1.29 www 2596: }
1.52 www 2597: }
1.29 www 2598:
1.52 www 2599: #
1.103 harris41 2600: # Gathered now: all privileges that could apply, and condition number
1.52 www 2601: #
2602: #
2603: # Full or no access?
2604: #
1.29 www 2605:
1.52 www 2606: if ($thisallowed=~/F/) {
2607: return 'F';
2608: }
1.29 www 2609:
1.52 www 2610: unless ($thisallowed) {
2611: return '';
2612: }
1.29 www 2613:
1.52 www 2614: # Restrictions exist, deal with them
2615: #
2616: # C:according to course preferences
2617: # R:according to resource settings
2618: # L:unless locked
2619: # X:according to user session state
2620: #
2621:
2622: # Possibly locked functionality, check all courses
1.54 www 2623: # Locks might take effect only after 10 minutes cache expiration for other
2624: # courses, and 2 minutes for current course
1.52 www 2625:
2626: my $envkey;
2627: if ($thisallowed=~/L/) {
2628: foreach $envkey (keys %ENV) {
1.54 www 2629: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
2630: my $courseid=$2;
2631: my $roleid=$1.'.'.$2;
1.92 www 2632: $courseid=~s/^\///;
1.54 www 2633: my $expiretime=600;
2634: if ($ENV{'request.role'} eq $roleid) {
2635: $expiretime=120;
2636: }
2637: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
2638: my $prefix='course.'.$cdom.'_'.$cnum.'.';
2639: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
2640: &coursedescription($courseid);
2641: }
2642: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
2643: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
2644: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1.57 www 2645: &log($ENV{'user.domain'},$ENV{'user.name'},
1.239 www 2646: $ENV{'user.home'},
1.57 www 2647: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1.52 www 2648: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1.54 www 2649: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1.52 www 2650: return '';
2651: }
2652: }
1.54 www 2653: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
2654: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
2655: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1.57 www 2656: &log($ENV{'user.domain'},$ENV{'user.name'},
1.239 www 2657: $ENV{'user.home'},
1.57 www 2658: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1.52 www 2659: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1.54 www 2660: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1.52 www 2661: return '';
2662: }
2663: }
2664: }
1.29 www 2665: }
1.52 www 2666: }
2667:
2668: #
2669: # Rest of the restrictions depend on selected course
2670: #
2671:
2672: unless ($ENV{'request.course.id'}) {
2673: return '1';
2674: }
1.29 www 2675:
1.52 www 2676: #
2677: # Now user is definitely in a course
2678: #
1.53 www 2679:
2680:
2681: # Course preferences
2682:
2683: if ($thisallowed=~/C/) {
1.54 www 2684: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1.237 www 2685: my $unamedom=$ENV{'user.name'}.':'.$ENV{'user.domain'};
1.54 www 2686: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1.194 www 2687: =~/$rolecode/) {
1.57 www 2688: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2689: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1.237 www 2690: $ENV{'request.course.id'});
2691: return '';
2692: }
2693:
2694: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.users.denied'}
2695: =~/$unamedom/) {
2696: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
2697: 'Denied by user: '.$priv.' for '.$uri.' as '.$unamedom.' in '.
1.54 www 2698: $ENV{'request.course.id'});
2699: return '';
2700: }
1.53 www 2701: }
2702:
2703: # Resource preferences
2704:
2705: if ($thisallowed=~/R/) {
1.54 www 2706: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1.341 www 2707: if (&metadata($uri,'roledeny')=~/$rolecode/) {
2708: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1.57 www 2709: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1.341 www 2710: return '';
1.54 www 2711: }
1.53 www 2712: }
1.30 www 2713:
1.246 www 2714: # Restricted by state or randomout?
1.30 www 2715:
1.52 www 2716: if ($thisallowed=~/X/) {
1.247 www 2717: if ($ENV{'acc.randomout'}) {
1.249 www 2718: my $symb=&symbread($uri,1);
1.248 www 2719: if (($symb) && ($ENV{'acc.randomout'}=~/\&$symb\&/)) {
2720: return '';
2721: }
1.247 www 2722: }
2723: if (&condval($statecond)) {
1.52 www 2724: return '2';
2725: } else {
2726: return '';
2727: }
2728: }
1.30 www 2729:
1.52 www 2730: return 'F';
1.232 www 2731: }
2732:
2733: # --------------------------------------------------- Is a resource on the map?
2734:
2735: sub is_on_map {
2736: my $uri=&declutter(shift);
1.435 ! www 2737: $uri=~s/\.\d+\.(\w+)$/\.$1/;
1.232 www 2738: my @uriparts=split(/\//,$uri);
2739: my $filename=$uriparts[$#uriparts];
2740: my $pathname=$uri;
1.289 bowersj2 2741: $pathname=~s|/\Q$filename\E$||;
1.332 www 2742: $pathname=~s/^adm\/wrapper\///;
1.289 bowersj2 2743: #Trying to find the conditional for the file
1.232 www 2744: my $match=($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1.289 bowersj2 2745: /\&\Q$filename\E\:([\d\|]+)\&/);
1.232 www 2746: if ($match) {
1.289 bowersj2 2747: return (1,$1);
2748: } else {
1.434 www 2749: return (0,0);
1.289 bowersj2 2750: }
1.12 www 2751: }
2752:
1.427 www 2753: # --------------------------------------------------------- Get symb from alias
2754:
2755: sub get_symb_from_alias {
2756: my $symb=shift;
2757: my ($map,$resid,$url)=&decode_symb($symb);
2758: # Already is a symb
2759: if ($url) { return $symb; }
2760: # Must be an alias
2761: my $aliassymb='';
2762: my %bighash;
2763: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2764: &GDBM_READER(),0640)) {
2765: my $rid=$bighash{'mapalias_'.$symb};
2766: if ($rid) {
2767: my ($mapid,$resid)=split(/\./,$rid);
1.429 albertel 2768: $aliassymb=&encode_symb($bighash{'map_id_'.$mapid},
2769: $resid,$bighash{'src_'.$rid});
1.427 www 2770: }
2771: untie %bighash;
2772: }
2773: return $aliassymb;
2774: }
2775:
1.12 www 2776: # ----------------------------------------------------------------- Define Role
2777:
2778: sub definerole {
2779: if (allowed('mcr','/')) {
2780: my ($rolename,$sysrole,$domrole,$courole)=@_;
1.392 www 2781: foreach (split(':',$sysrole)) {
1.21 www 2782: my ($crole,$cqual)=split(/\&/,$_);
2783: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
2784: if ($pr{'cr:s'}=~/$crole\&/) {
2785: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
2786: return "refused:s:$crole&$cqual";
2787: }
2788: }
1.191 harris41 2789: }
1.392 www 2790: foreach (split(':',$domrole)) {
1.21 www 2791: my ($crole,$cqual)=split(/\&/,$_);
2792: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
2793: if ($pr{'cr:d'}=~/$crole\&/) {
2794: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
2795: return "refused:d:$crole&$cqual";
2796: }
2797: }
1.191 harris41 2798: }
1.392 www 2799: foreach (split(':',$courole)) {
1.21 www 2800: my ($crole,$cqual)=split(/\&/,$_);
2801: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
2802: if ($pr{'cr:c'}=~/$crole\&/) {
2803: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
2804: return "refused:c:$crole&$cqual";
2805: }
2806: }
1.191 harris41 2807: }
1.12 www 2808: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2809: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1.21 www 2810: "rolesdef_$rolename=".
2811: escape($sysrole.'_'.$domrole.'_'.$courole);
1.12 www 2812: return reply($command,$ENV{'user.home'});
2813: } else {
2814: return 'refused';
2815: }
1.105 harris41 2816: }
2817:
2818: # ---------------- Make a metadata query against the network of library servers
2819:
2820: sub metadata_query {
1.244 matthew 2821: my ($query,$custom,$customshow,$server_array)=@_;
1.120 harris41 2822: my %rhash;
1.244 matthew 2823: my @server_list = (defined($server_array) ? @$server_array
2824: : keys(%libserv) );
2825: for my $server (@server_list) {
1.118 harris41 2826: unless ($custom or $customshow) {
2827: my $reply=&reply("querysend:".&escape($query),$server);
2828: $rhash{$server}=$reply;
2829: }
2830: else {
2831: my $reply=&reply("querysend:".&escape($query).':'.
2832: &escape($custom).':'.&escape($customshow),
2833: $server);
2834: $rhash{$server}=$reply;
2835: }
1.112 harris41 2836: }
1.118 harris41 2837: return \%rhash;
1.240 www 2838: }
2839:
2840: # ----------------------------------------- Send log queries and wait for reply
2841:
2842: sub log_query {
2843: my ($uname,$udom,$query,%filters)=@_;
2844: my $uhome=&homeserver($uname,$udom);
2845: if ($uhome eq 'no_host') { return 'error: no_host'; }
2846: my $uhost=$hostname{$uhome};
1.241 www 2847: my $command=&escape(join(':',map{$_.'='.$filters{$_}} keys %filters));
1.240 www 2848: my $queryid=&reply("querysend:".$query.':'.$udom.':'.$uname.':'.$command,
2849: $uhome);
2850: unless ($queryid=~/^$uhost\_/) { return 'error: '.$queryid; }
1.242 www 2851: return get_query_reply($queryid);
2852: }
2853:
2854: sub get_query_reply {
2855: my $queryid=shift;
1.240 www 2856: my $replyfile=$perlvar{'lonDaemons'}.'/tmp/'.$queryid;
2857: my $reply='';
2858: for (1..100) {
2859: sleep 2;
2860: if (-e $replyfile.'.end') {
2861: if (my $fh=Apache::File->new($replyfile)) {
2862: $reply.=<$fh>;
2863: $fh->close;
2864: } else { return 'error: reply_file_error'; }
1.242 www 2865: return &unescape($reply);
2866: }
1.240 www 2867: }
1.242 www 2868: return 'timeout:'.$queryid;
1.240 www 2869: }
2870:
2871: sub courselog_query {
1.241 www 2872: #
2873: # possible filters:
2874: # url: url or symb
2875: # username
2876: # domain
2877: # action: view, submit, grade
2878: # start: timestamp
2879: # end: timestamp
2880: #
1.240 www 2881: my (%filters)=@_;
2882: unless ($ENV{'request.course.id'}) { return 'no_course'; }
1.241 www 2883: if ($filters{'url'}) {
2884: $filters{'url'}=&symbclean(&declutter($filters{'url'}));
2885: $filters{'url'}=~s/\.(\w+)$/(\\.\\d+)*\\.$1/;
2886: $filters{'url'}=~s/\.(\w+)\_\_\_/(\\.\\d+)*\\.$1/;
2887: }
1.240 www 2888: my $cname=$ENV{'course.'.$ENV{'request.course.id'}.'.num'};
2889: my $cdom=$ENV{'course.'.$ENV{'request.course.id'}.'.domain'};
2890: return &log_query($cname,$cdom,'courselog',%filters);
2891: }
2892:
2893: sub userlog_query {
2894: my ($uname,$udom,%filters)=@_;
2895: return &log_query($uname,$udom,'userlog',%filters);
1.12 www 2896: }
2897:
2898: # ------------------------------------------------------------------ Plain Text
2899:
2900: sub plaintext {
1.22 www 2901: my $short=shift;
1.414 www 2902: return &mt($prp{$short});
1.12 www 2903: }
2904:
2905: # ----------------------------------------------------------------- Assign Role
2906:
2907: sub assignrole {
1.357 www 2908: my ($udom,$uname,$url,$role,$end,$start,$deleteflag)=@_;
1.21 www 2909: my $mrole;
2910: if ($role =~ /^cr\//) {
1.393 www 2911: my $cwosec=$url;
2912: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
2913: unless (&allowed('ccr',$cwosec)) {
1.104 www 2914: &logthis('Refused custom assignrole: '.
2915: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2916: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2917: return 'refused';
2918: }
1.21 www 2919: $mrole='cr';
2920: } else {
1.82 www 2921: my $cwosec=$url;
1.83 www 2922: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1.373 www 2923: unless ((&allowed('c'.$role,$cwosec)) || &allowed('c'.$role,$udom)) {
1.104 www 2924: &logthis('Refused assignrole: '.
2925: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
2926: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
2927: return 'refused';
2928: }
1.21 www 2929: $mrole=$role;
2930: }
2931: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
2932: "$udom:$uname:$url".'_'."$mrole=$role";
1.81 www 2933: if ($end) { $command.='_'.$end; }
1.21 www 2934: if ($start) {
2935: if ($end) {
1.81 www 2936: $command.='_'.$start;
1.21 www 2937: } else {
1.81 www 2938: $command.='_0_'.$start;
1.21 www 2939: }
2940: }
1.357 www 2941: # actually delete
2942: if ($deleteflag) {
1.373 www 2943: if ((&allowed('dro',$udom)) || (&allowed('dro',$url))) {
1.357 www 2944: # modify command to delete the role
2945: $command="encrypt:rolesdel:$ENV{'user.domain'}:$ENV{'user.name'}:".
2946: "$udom:$uname:$url".'_'."$mrole";
1.373 www 2947: &logthis("$ENV{'user.name'} at $ENV{'user.domain'} deletes $mrole in $url for $uname at $udom");
1.357 www 2948: # set start and finish to negative values for userrolelog
2949: $start=-1;
2950: $end=-1;
2951: }
2952: }
2953: # send command
1.349 www 2954: my $answer=&reply($command,&homeserver($uname,$udom));
1.357 www 2955: # log new user role if status is ok
1.349 www 2956: if ($answer eq 'ok') {
2957: &userrolelog($mrole,$uname,$udom,$url,$start,$end);
2958: }
2959: return $answer;
1.169 harris41 2960: }
2961:
2962: # -------------------------------------------------- Modify user authentication
1.197 www 2963: # Overrides without validation
2964:
1.169 harris41 2965: sub modifyuserauth {
2966: my ($udom,$uname,$umode,$upass)=@_;
2967: my $uhome=&homeserver($uname,$udom);
1.197 www 2968: unless (&allowed('mau',$udom)) { return 'refused'; }
2969: &logthis('Call to modify user authentication '.$udom.', '.$uname.', '.
1.272 matthew 2970: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
2971: ' in domain '.$ENV{'request.role.domain'});
1.169 harris41 2972: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
2973: &escape($upass),$uhome);
1.197 www 2974: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.home'},
2975: 'Authentication changed for '.$udom.', '.$uname.', '.$umode.
2976: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
2977: &log($udom,,$uname,$uhome,
2978: 'Authentication changed by '.$ENV{'user.domain'}.', '.
2979: $ENV{'user.name'}.', '.$umode.
2980: '(Remote '.$ENV{'REMOTE_ADDR'}.'): '.$reply);
1.169 harris41 2981: unless ($reply eq 'ok') {
1.197 www 2982: &logthis('Authentication mode error: '.$reply);
1.169 harris41 2983: return 'error: '.$reply;
2984: }
1.170 harris41 2985: return 'ok';
1.80 www 2986: }
2987:
1.81 www 2988: # --------------------------------------------------------------- Modify a user
1.80 www 2989:
1.81 www 2990: sub modifyuser {
1.206 matthew 2991: my ($udom, $uname, $uid,
2992: $umode, $upass, $first,
2993: $middle, $last, $gene,
1.387 www 2994: $forceid, $desiredhome, $email)=@_;
1.198 www 2995: $udom=~s/\W//g;
2996: $uname=~s/\W//g;
1.81 www 2997: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1.80 www 2998: $umode.', '.$first.', '.$middle.', '.
1.206 matthew 2999: $last.', '.$gene.'(forceid: '.$forceid.')'.
3000: (defined($desiredhome) ? ' desiredhome = '.$desiredhome :
3001: ' desiredhome not specified').
1.272 matthew 3002: ' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'}.
3003: ' in domain '.$ENV{'request.role.domain'});
1.230 stredwic 3004: my $uhome=&homeserver($uname,$udom,'true');
1.80 www 3005: # ----------------------------------------------------------------- Create User
1.406 albertel 3006: if (($uhome eq 'no_host') &&
3007: (($umode && $upass) || ($umode eq 'localauth'))) {
1.80 www 3008: my $unhome='';
1.209 matthew 3009: if (defined($desiredhome) && $hostdom{$desiredhome} eq $udom) {
3010: $unhome = $desiredhome;
3011: } elsif($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1.80 www 3012: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1.209 matthew 3013: } else { # load balancing routine for determining $unhome
1.80 www 3014: my $tryserver;
1.81 www 3015: my $loadm=10000000;
1.80 www 3016: foreach $tryserver (keys %libserv) {
3017: if ($hostdom{$tryserver} eq $udom) {
3018: my $answer=reply('load',$tryserver);
3019: if (($answer=~/\d+/) && ($answer<$loadm)) {
3020: $loadm=$answer;
3021: $unhome=$tryserver;
3022: }
3023: }
3024: }
3025: }
3026: if (($unhome eq '') || ($unhome eq 'no_host')) {
1.206 matthew 3027: return 'error: unable to find a home server for '.$uname.
3028: ' in domain '.$udom;
1.80 www 3029: }
3030: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
3031: &escape($upass),$unhome);
3032: unless ($reply eq 'ok') {
3033: return 'error: '.$reply;
3034: }
1.230 stredwic 3035: $uhome=&homeserver($uname,$udom,'true');
1.80 www 3036: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1.386 matthew 3037: return 'error: unable verify users home machine.';
1.80 www 3038: }
1.209 matthew 3039: } # End of creation of new user
1.80 www 3040: # ---------------------------------------------------------------------- Add ID
3041: if ($uid) {
3042: $uid=~tr/A-Z/a-z/;
3043: my %uidhash=&idrget($udom,$uname);
1.196 www 3044: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)
3045: && (!$forceid)) {
1.80 www 3046: unless ($uid eq $uidhash{$uname}) {
1.386 matthew 3047: return 'error: user id "'.$uid.'" does not match '.
3048: 'current user id "'.$uidhash{$uname}.'".';
1.80 www 3049: }
3050: } else {
3051: &idput($udom,($uname => $uid));
3052: }
3053: }
3054: # -------------------------------------------------------------- Add names, etc
1.313 matthew 3055: my @tmp=&get('environment',
1.134 albertel 3056: ['firstname','middlename','lastname','generation'],
3057: $udom,$uname);
1.313 matthew 3058: my %names;
3059: if ($tmp[0] =~ m/^error:.*/) {
3060: %names=();
3061: } else {
3062: %names = @tmp;
3063: }
1.388 www 3064: #
3065: # Make sure to not trash student environment if instructor does not bother
3066: # to supply name and email information
3067: #
3068: if ($first) { $names{'firstname'} = $first; }
1.385 matthew 3069: if (defined($middle)) { $names{'middlename'} = $middle; }
1.388 www 3070: if ($last) { $names{'lastname'} = $last; }
1.385 matthew 3071: if (defined($gene)) { $names{'generation'} = $gene; }
1.388 www 3072: if ($email) { $names{'notification'} = $email;
3073: $names{'critnotification'} = $email; }
1.387 www 3074:
1.134 albertel 3075: my $reply = &put('environment', \%names, $udom,$uname);
3076: if ($reply ne 'ok') { return 'error: '.$reply; }
1.81 www 3077: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1.80 www 3078: $umode.', '.$first.', '.$middle.', '.
3079: $last.', '.$gene.' by '.
3080: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1.134 albertel 3081: return 'ok';
1.80 www 3082: }
3083:
1.81 www 3084: # -------------------------------------------------------------- Modify student
1.80 www 3085:
1.81 www 3086: sub modifystudent {
3087: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1.387 www 3088: $end,$start,$forceid,$desiredhome,$email)=@_;
1.81 www 3089: my $cid='';
3090: unless ($cid=$ENV{'request.course.id'}) {
1.80 www 3091: return 'not_in_class';
3092: }
3093: # --------------------------------------------------------------- Make the user
1.81 www 3094: my $reply=&modifyuser
1.209 matthew 3095: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$forceid,
1.387 www 3096: $desiredhome,$email);
1.80 www 3097: unless ($reply eq 'ok') { return $reply; }
1.297 matthew 3098: # This will cause &modify_student_enrollment to get the uid from the
3099: # students environment
3100: $uid = undef if (!$forceid);
3101: $reply = &modify_student_enrollment($udom,$uname,$uid,$first,$middle,
3102: $last,$gene,$usec,$end,$start);
3103: return $reply;
3104: }
3105:
3106: sub modify_student_enrollment {
3107: my ($udom,$uname,$uid,$first,$middle,$last,$gene,$usec,$end,$start) = @_;
3108: # Get the course id from the environment
3109: my $cid='';
3110: unless ($cid=$ENV{'request.course.id'}) {
3111: return 'not_in_class';
3112: }
3113: # Make sure the user exists
1.81 www 3114: my $uhome=&homeserver($uname,$udom);
3115: if (($uhome eq '') || ($uhome eq 'no_host')) {
3116: return 'error: no such user';
3117: }
1.297 matthew 3118: #
3119: # Get student data if we were not given enough information
3120: if (!defined($first) || $first eq '' ||
3121: !defined($last) || $last eq '' ||
3122: !defined($uid) || $uid eq '' ||
3123: !defined($middle) || $middle eq '' ||
3124: !defined($gene) || $gene eq '') {
1.294 matthew 3125: # They did not supply us with enough data to enroll the student, so
3126: # we need to pick up more information.
1.297 matthew 3127: my %tmp = &get('environment',
1.294 matthew 3128: ['firstname','middlename','lastname', 'generation','id']
1.297 matthew 3129: ,$udom,$uname);
3130:
3131: foreach (keys(%tmp)) {
3132: &logthis("key $_ = ".$tmp{$_});
3133: }
1.294 matthew 3134: $first = $tmp{'firstname'} if (!defined($first) || $first eq '');
3135: $middle = $tmp{'middlename'} if (!defined($middle) || $middle eq '');
3136: $last = $tmp{'lastname'} if (!defined($last) || $last eq '');
1.297 matthew 3137: $gene = $tmp{'generation'} if (!defined($gene) || $gene eq '');
1.294 matthew 3138: $uid = $tmp{'id'} if (!defined($uid) || $uid eq '');
3139: }
3140: my $fullname = &Apache::loncoursedata::ProcessFullName($last,$gene,
3141: $first,$middle);
1.297 matthew 3142: my $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1.81 www 3143: $ENV{'course.'.$cid.'.num'}.':classlist:'.
3144: &escape($uname.':'.$udom).'='.
1.294 matthew 3145: &escape(join(':',$end,$start,$uid,$usec,$fullname)),
1.81 www 3146: $ENV{'course.'.$cid.'.home'});
3147: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
3148: return 'error: '.$reply;
3149: }
1.297 matthew 3150: # Add student role to user
1.83 www 3151: my $uurl='/'.$cid;
1.81 www 3152: $uurl=~s/\_/\//g;
3153: if ($usec) {
3154: $uurl.='/'.$usec;
3155: }
3156: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1.21 www 3157: }
3158:
1.84 www 3159: # ------------------------------------------------- Write to course preferences
3160:
3161: sub writecoursepref {
3162: my ($courseid,%prefs)=@_;
3163: $courseid=~s/^\///;
3164: $courseid=~s/\_/\//g;
3165: my ($cdomain,$cnum)=split(/\//,$courseid);
3166: my $chome=homeserver($cnum,$cdomain);
3167: if (($chome eq '') || ($chome eq 'no_host')) {
3168: return 'error: no such course';
3169: }
3170: my $cstring='';
1.191 harris41 3171: foreach (keys %prefs) {
1.84 www 3172: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1.191 harris41 3173: }
1.84 www 3174: $cstring=~s/\&$//;
3175: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
3176: }
3177:
3178: # ---------------------------------------------------------- Make/modify course
3179:
3180: sub createcourse {
1.271 www 3181: my ($udom,$description,$url,$course_server,$nonstandard)=@_;
1.84 www 3182: $url=&declutter($url);
3183: my $cid='';
1.264 matthew 3184: unless (&allowed('ccc',$udom)) {
1.84 www 3185: return 'refused';
3186: }
3187: # ------------------------------------------------------------------- Create ID
3188: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3189: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
3190: # ----------------------------------------------- Make sure that does not exist
1.230 stredwic 3191: my $uhome=&homeserver($uname,$udom,'true');
1.84 www 3192: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3193: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
3194: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1.230 stredwic 3195: $uhome=&homeserver($uname,$udom,'true');
1.84 www 3196: unless (($uhome eq '') || ($uhome eq 'no_host')) {
3197: return 'error: unable to generate unique course-ID';
3198: }
3199: }
1.264 matthew 3200: # ------------------------------------------------ Check supplied server name
3201: $course_server = $ENV{'user.homeserver'} if (! defined($course_server));
3202: if (! exists($libserv{$course_server})) {
3203: return 'error:bad server name '.$course_server;
3204: }
1.84 www 3205: # ------------------------------------------------------------- Make the course
3206: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1.264 matthew 3207: $course_server);
1.84 www 3208: unless ($reply eq 'ok') { return 'error: '.$reply; }
1.230 stredwic 3209: $uhome=&homeserver($uname,$udom,'true');
1.84 www 3210: if (($uhome eq '') || ($uhome eq 'no_host')) {
3211: return 'error: no such course';
3212: }
1.271 www 3213: # ----------------------------------------------------------------- Course made
1.358 www 3214: # log existance
3215: &courseidput($udom,&escape($udom.'_'.$uname).'='.&escape($description),
3216: $uhome);
3217: &flushcourselogs();
3218: # set toplevel url
1.271 www 3219: my $topurl=$url;
3220: unless ($nonstandard) {
3221: # ------------------------------------------ For standard courses, make top url
3222: my $mapurl=&clutter($url);
1.278 www 3223: if ($mapurl eq '/res/') { $mapurl=''; }
1.271 www 3224: $ENV{'form.initmap'}=(<<ENDINITMAP);
3225: <map>
3226: <resource id="1" type="start"></resource>
3227: <resource id="2" src="$mapurl"></resource>
3228: <resource id="3" type="finish"></resource>
3229: <link index="1" from="1" to="2"></link>
3230: <link index="2" from="2" to="3"></link>
3231: </map>
3232: ENDINITMAP
3233: $topurl=&declutter(
3234: &finishuserfileupload($uname,$udom,$uhome,'initmap','default.sequence')
3235: );
3236: }
3237: # ----------------------------------------------------------- Write preferences
1.84 www 3238: &writecoursepref($udom.'_'.$uname,
3239: ('description' => $description,
1.271 www 3240: 'url' => $topurl));
1.84 www 3241: return '/'.$udom.'/'.$uname;
3242: }
3243:
1.21 www 3244: # ---------------------------------------------------------- Assign Custom Role
3245:
3246: sub assigncustomrole {
1.357 www 3247: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start,$deleteflag)=@_;
1.21 www 3248: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1.357 www 3249: $end,$start,$deleteflag);
1.21 www 3250: }
3251:
3252: # ----------------------------------------------------------------- Revoke Role
3253:
3254: sub revokerole {
1.357 www 3255: my ($udom,$uname,$url,$role,$deleteflag)=@_;
1.21 www 3256: my $now=time;
1.357 www 3257: return &assignrole($udom,$uname,$url,$role,$now,$deleteflag);
1.21 www 3258: }
3259:
3260: # ---------------------------------------------------------- Revoke Custom Role
3261:
3262: sub revokecustomrole {
1.357 www 3263: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$deleteflag)=@_;
1.21 www 3264: my $now=time;
1.357 www 3265: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now,
3266: $deleteflag);
1.17 www 3267: }
3268:
3269: # ------------------------------------------------------------ Directory lister
3270:
3271: sub dirlist {
1.253 stredwic 3272: my ($uri,$userdomain,$username,$alternateDirectoryRoot)=@_;
3273:
1.18 www 3274: $uri=~s/^\///;
3275: $uri=~s/\/$//;
1.253 stredwic 3276: my ($udom, $uname);
3277: (undef,$udom,$uname)=split(/\//,$uri);
3278: if(defined($userdomain)) {
3279: $udom = $userdomain;
3280: }
3281: if(defined($username)) {
3282: $uname = $username;
3283: }
3284:
3285: my $dirRoot = $perlvar{'lonDocRoot'};
3286: if(defined($alternateDirectoryRoot)) {
3287: $dirRoot = $alternateDirectoryRoot;
3288: $dirRoot =~ s/\/$//;
3289: }
3290:
3291: if($udom) {
3292: if($uname) {
3293: my $listing=reply('ls:'.$dirRoot.'/'.$uri,
3294: homeserver($uname,$udom));
3295: return split(/:/,$listing);
3296: } elsif(!defined($alternateDirectoryRoot)) {
3297: my $tryserver;
3298: my %allusers=();
3299: foreach $tryserver (keys %libserv) {
3300: if($hostdom{$tryserver} eq $udom) {
3301: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.
3302: $udom, $tryserver);
3303: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
3304: && ($listing ne 'con_lost')) {
3305: foreach (split(/:/,$listing)) {
3306: my ($entry,@stat)=split(/&/,$_);
3307: $allusers{$entry}=1;
3308: }
3309: }
1.191 harris41 3310: }
1.253 stredwic 3311: }
3312: my $alluserstr='';
3313: foreach (sort keys %allusers) {
3314: $alluserstr.=$_.'&user:';
3315: }
3316: $alluserstr=~s/:$//;
3317: return split(/:/,$alluserstr);
3318: } else {
3319: my @emptyResults = ();
3320: push(@emptyResults, 'missing user name');
3321: return split(':',@emptyResults);
3322: }
3323: } elsif(!defined($alternateDirectoryRoot)) {
3324: my $tryserver;
3325: my %alldom=();
3326: foreach $tryserver (keys %libserv) {
3327: $alldom{$hostdom{$tryserver}}=1;
3328: }
3329: my $alldomstr='';
3330: foreach (sort keys %alldom) {
1.397 albertel 3331: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'/&domain:';
1.253 stredwic 3332: }
3333: $alldomstr=~s/:$//;
3334: return split(/:/,$alldomstr);
3335: } else {
3336: my @emptyResults = ();
3337: push(@emptyResults, 'missing domain');
3338: return split(':',@emptyResults);
1.275 stredwic 3339: }
3340: }
3341:
3342: # --------------------------------------------- GetFileTimestamp
3343: # This function utilizes dirlist and returns the date stamp for
3344: # when it was last modified. It will also return an error of -1
3345: # if an error occurs
3346:
1.410 matthew 3347: ##
3348: ## FIXME: This subroutine assumes its caller knows something about the
3349: ## directory structure of the home server for the student ($root).
3350: ## Not a good assumption to make. Since this is for looking up files
3351: ## in user directories, the full path should be constructed by lond, not
3352: ## whatever machine we request data from.
3353: ##
1.275 stredwic 3354: sub GetFileTimestamp {
3355: my ($studentDomain,$studentName,$filename,$root)=@_;
3356: $studentDomain=~s/\W//g;
3357: $studentName=~s/\W//g;
3358: my $subdir=$studentName.'__';
3359: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
3360: my $proname="$studentDomain/$subdir/$studentName";
3361: $proname .= '/'.$filename;
1.375 matthew 3362: my ($fileStat) = &Apache::lonnet::dirlist($proname, $studentDomain,
3363: $studentName, $root);
1.275 stredwic 3364: my @stats = split('&', $fileStat);
3365: if($stats[0] ne 'empty' && $stats[0] ne 'no_such_dir') {
1.375 matthew 3366: # @stats contains first the filename, then the stat output
3367: return $stats[10]; # so this is 10 instead of 9.
1.275 stredwic 3368: } else {
3369: return -1;
1.253 stredwic 3370: }
1.26 www 3371: }
3372:
3373: # -------------------------------------------------------- Value of a Condition
3374:
1.40 www 3375: sub directcondval {
3376: my $number=shift;
3377: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
3378: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
3379: } else {
3380: return 2;
3381: }
3382: }
3383:
1.26 www 3384: sub condval {
3385: my $condidx=shift;
3386: my $result=0;
1.54 www 3387: my $allpathcond='';
1.191 harris41 3388: foreach (split(/\|/,$condidx)) {
1.54 www 3389: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
3390: $allpathcond.=
3391: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
3392: }
1.191 harris41 3393: }
1.54 www 3394: $allpathcond=~s/\|$//;
1.33 www 3395: if ($ENV{'request.course.id'}) {
1.54 www 3396: if ($allpathcond) {
1.26 www 3397: my $operand='|';
3398: my @stack;
1.191 harris41 3399: foreach ($allpathcond=~/(\d+|\(|\)|\&|\|)/g) {
1.26 www 3400: if ($_ eq '(') {
3401: push @stack,($operand,$result)
3402: } elsif ($_ eq ')') {
3403: my $before=pop @stack;
3404: if (pop @stack eq '&') {
3405: $result=$result>$before?$before:$result;
3406: } else {
3407: $result=$result>$before?$result:$before;
3408: }
3409: } elsif (($_ eq '&') || ($_ eq '|')) {
3410: $operand=$_;
3411: } else {
1.40 www 3412: my $new=directcondval($_);
1.26 www 3413: if ($operand eq '&') {
3414: $result=$result>$new?$new:$result;
3415: } else {
3416: $result=$result>$new?$result:$new;
1.191 harris41 3417: }
1.26 www 3418: }
1.191 harris41 3419: }
1.26 www 3420: }
3421: }
3422: return $result;
1.421 albertel 3423: }
3424:
3425: # ---------------------------------------------------- Devalidate courseresdata
3426:
3427: sub devalidatecourseresdata {
3428: my ($coursenum,$coursedomain)=@_;
3429: my $hashid=$coursenum.':'.$coursedomain;
1.428 albertel 3430: &devalidate_cache(\%courseresdatacache,$hashid,'courseres');
1.28 www 3431: }
3432:
1.200 www 3433: # --------------------------------------------------- Course Resourcedata Query
3434:
3435: sub courseresdata {
3436: my ($coursenum,$coursedomain,@which)=@_;
3437: my $coursehom=&homeserver($coursenum,$coursedomain);
3438: my $hashid=$coursenum.':'.$coursedomain;
1.425 albertel 3439: my ($result,$cached)=&is_cached(\%courseresdatacache,$hashid,'courseres');
1.417 albertel 3440: unless (defined($cached)) {
1.251 albertel 3441: my %dumpreply=&dump('resourcedata',$coursedomain,$coursenum);
1.417 albertel 3442: $result=\%dumpreply;
1.251 albertel 3443: my ($tmp) = keys(%dumpreply);
3444: if ($tmp !~ /^(con_lost|error|no_such_host)/i) {
1.425 albertel 3445: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
1.306 albertel 3446: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3447: return $tmp;
1.416 albertel 3448: } elsif ($tmp =~ /^(error)/) {
1.417 albertel 3449: $result=undef;
1.425 albertel 3450: &do_cache(\%courseresdatacache,$hashid,$result,'courseres');
1.250 albertel 3451: }
3452: }
1.251 albertel 3453: foreach my $item (@which) {
1.417 albertel 3454: if (defined($result->{$item})) {
3455: return $result->{$item};
1.251 albertel 3456: }
1.250 albertel 3457: }
1.291 albertel 3458: return undef;
1.200 www 3459: }
3460:
1.379 matthew 3461: #
3462: # EXT resource caching routines
3463: #
3464:
3465: sub clear_EXT_cache_status {
1.383 albertel 3466: &delenv('cache.EXT.');
1.379 matthew 3467: }
3468:
3469: sub EXT_cache_status {
3470: my ($target_domain,$target_user) = @_;
1.383 albertel 3471: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
1.389 www 3472: if (exists($ENV{$cachename}) && ($ENV{$cachename}+600) > time) {
1.379 matthew 3473: # We know already the user has no data
3474: return 1;
3475: } else {
3476: return 0;
3477: }
3478: }
3479:
3480: sub EXT_cache_set {
3481: my ($target_domain,$target_user) = @_;
1.383 albertel 3482: my $cachename = 'cache.EXT.'.$target_user.'.'.$target_domain;
1.379 matthew 3483: &appenv($cachename => time);
3484: }
3485:
1.28 www 3486: # --------------------------------------------------------- Value of a Variable
1.58 www 3487: sub EXT {
1.395 albertel 3488: my ($varname,$symbparm,$udom,$uname,$usection,$recurse)=@_;
1.218 albertel 3489:
1.68 www 3490: unless ($varname) { return ''; }
1.218 albertel 3491: #get real user name/domain, courseid and symb
3492: my $courseid;
1.359 albertel 3493: my $publicuser;
1.427 www 3494: if ($symbparm) {
3495: $symbparm=&get_symb_from_alias($symbparm);
3496: }
1.218 albertel 3497: if (!($uname && $udom)) {
1.360 albertel 3498: (my $cursymb,$courseid,$udom,$uname,$publicuser)=
1.378 matthew 3499: &Apache::lonxml::whichuser($symbparm);
1.218 albertel 3500: if (!$symbparm) { $symbparm=$cursymb; }
3501: } else {
3502: $courseid=$ENV{'request.course.id'};
3503: }
1.48 www 3504: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
3505: my $rest;
1.320 albertel 3506: if (defined($therest[0])) {
1.48 www 3507: $rest=join('.',@therest);
3508: } else {
3509: $rest='';
3510: }
1.320 albertel 3511:
1.57 www 3512: my $qualifierrest=$qualifier;
3513: if ($rest) { $qualifierrest.='.'.$rest; }
3514: my $spacequalifierrest=$space;
3515: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1.28 www 3516: if ($realm eq 'user') {
1.48 www 3517: # --------------------------------------------------------------- user.resource
3518: if ($space eq 'resource') {
1.335 albertel 3519: if (defined($Apache::lonhomework::parsing_a_problem)) {
3520: return $Apache::lonhomework::history{$qualifierrest};
3521: } else {
1.359 albertel 3522: my %restored;
3523: if ($publicuser || $ENV{'request.state'} eq 'construct') {
3524: %restored=&tmprestore($symbparm,$courseid,$udom,$uname);
3525: } else {
3526: %restored=&restore($symbparm,$courseid,$udom,$uname);
3527: }
1.335 albertel 3528: return $restored{$qualifierrest};
3529: }
1.48 www 3530: # ----------------------------------------------------------------- user.access
3531: } elsif ($space eq 'access') {
1.218 albertel 3532: # FIXME - not supporting calls for a specific user
1.48 www 3533: return &allowed($qualifier,$rest);
3534: # ------------------------------------------ user.preferences, user.environment
3535: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1.218 albertel 3536: if (($uname eq $ENV{'user.name'}) &&
3537: ($udom eq $ENV{'user.domain'})) {
3538: return $ENV{join('.',('environment',$qualifierrest))};
3539: } else {
1.359 albertel 3540: my %returnhash;
3541: if (!$publicuser) {
3542: %returnhash=&userenvironment($udom,$uname,
3543: $qualifierrest);
3544: }
1.218 albertel 3545: return $returnhash{$qualifierrest};
3546: }
1.48 www 3547: # ----------------------------------------------------------------- user.course
3548: } elsif ($space eq 'course') {
1.218 albertel 3549: # FIXME - not supporting calls for a specific user
1.48 www 3550: return $ENV{join('.',('request.course',$qualifier))};
3551: # ------------------------------------------------------------------- user.role
3552: } elsif ($space eq 'role') {
1.218 albertel 3553: # FIXME - not supporting calls for a specific user
1.48 www 3554: my ($role,$where)=split(/\./,$ENV{'request.role'});
3555: if ($qualifier eq 'value') {
3556: return $role;
3557: } elsif ($qualifier eq 'extent') {
3558: return $where;
3559: }
3560: # ----------------------------------------------------------------- user.domain
3561: } elsif ($space eq 'domain') {
1.218 albertel 3562: return $udom;
1.48 www 3563: # ------------------------------------------------------------------- user.name
3564: } elsif ($space eq 'name') {
1.218 albertel 3565: return $uname;
1.48 www 3566: # ---------------------------------------------------- Any other user namespace
1.29 www 3567: } else {
1.359 albertel 3568: my %reply;
3569: if (!$publicuser) {
3570: %reply=&get($space,[$qualifierrest],$udom,$uname);
3571: }
3572: return $reply{$qualifierrest};
1.48 www 3573: }
1.236 www 3574: } elsif ($realm eq 'query') {
3575: # ---------------------------------------------- pull stuff out of query string
1.384 albertel 3576: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
3577: [$spacequalifierrest]);
1.376 albertel 3578: return $ENV{'form.'.$spacequalifierrest};
1.236 www 3579: } elsif ($realm eq 'request') {
1.48 www 3580: # ------------------------------------------------------------- request.browser
3581: if ($space eq 'browser') {
1.430 www 3582: if ($qualifier eq 'textremote') {
3583: if (&mt('textual_remote_display') eq 'on') {
3584: return 1;
3585: } else {
3586: return 0;
3587: }
3588: } else {
3589: return $ENV{'browser.'.$qualifier};
3590: }
1.57 www 3591: # ------------------------------------------------------------ request.filename
3592: } else {
3593: return $ENV{'request.'.$spacequalifierrest};
1.29 www 3594: }
1.28 www 3595: } elsif ($realm eq 'course') {
1.48 www 3596: # ---------------------------------------------------------- course.description
1.218 albertel 3597: return $ENV{'course.'.$courseid.'.'.$spacequalifierrest};
1.57 www 3598: } elsif ($realm eq 'resource') {
1.165 www 3599:
1.395 albertel 3600: my $section;
1.359 albertel 3601: if (defined($courseid) && $courseid eq $ENV{'request.course.id'}) {
1.165 www 3602:
1.218 albertel 3603: #print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
1.165 www 3604:
1.60 www 3605: # ----------------------------------------------------- Cascading lookup scheme
1.218 albertel 3606: if (!$symbparm) { $symbparm=&symbread(); }
3607: my $symbp=$symbparm;
1.409 www 3608: my $mapp=(&decode_symb($symbp))[0];
1.218 albertel 3609:
3610: my $symbparm=$symbp.'.'.$spacequalifierrest;
3611: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
3612:
3613: if (($ENV{'user.name'} eq $uname) &&
3614: ($ENV{'user.domain'} eq $udom)) {
1.255 albertel 3615: $section=$ENV{'request.course.sec'};
1.218 albertel 3616: } else {
1.377 matthew 3617: if (! defined($usection)) {
3618: $section=&usection($udom,$uname,$courseid);
3619: } else {
3620: $section = $usection;
3621: }
1.218 albertel 3622: }
3623:
3624: my $seclevel=$courseid.'.['.$section.'].'.$spacequalifierrest;
3625: my $seclevelr=$courseid.'.['.$section.'].'.$symbparm;
3626: my $seclevelm=$courseid.'.['.$section.'].'.$mapparm;
3627:
3628: my $courselevel=$courseid.'.'.$spacequalifierrest;
3629: my $courselevelr=$courseid.'.'.$symbparm;
3630: my $courselevelm=$courseid.'.'.$mapparm;
1.69 www 3631:
1.60 www 3632: # ----------------------------------------------------------- first, check user
1.379 matthew 3633: #most student don\'t have any data set, check if there is some data
3634: if (! &EXT_cache_status($udom,$uname)) {
1.420 albertel 3635: my $hashid="$udom:$uname";
1.425 albertel 3636: my ($result,$cached)=&is_cached(\%userresdatacache,$hashid,
3637: 'userres');
1.420 albertel 3638: if (!defined($cached)) {
3639: my %resourcedata=&get('resourcedata',
3640: [$courselevelr,$courselevelm,
3641: $courselevel],$udom,$uname);
3642: $result=\%resourcedata;
1.425 albertel 3643: &do_cache(\%userresdatacache,$hashid,$result,'userres');
1.420 albertel 3644: }
3645: my ($tmp)=keys(%$result);
1.308 albertel 3646: if (($tmp!~/^error\:/) && ($tmp!~/^con_lost/)) {
1.420 albertel 3647: if ($$result{$courselevelr}) {
3648: return $$result{$courselevelr}; }
3649: if ($$result{$courselevelm}) {
3650: return $$result{$courselevelm}; }
3651: if ($$result{$courselevel}) {
3652: return $$result{$courselevel}; }
1.308 albertel 3653: } else {
3654: if ($tmp!~/No such file/) {
3655: &logthis("<font color=blue>WARNING:".
3656: " Trying to get resource data for ".
3657: $uname." at ".$udom.": ".
3658: $tmp."</font>");
3659: } elsif ($tmp=~/error:No such file/) {
1.379 matthew 3660: &EXT_cache_set($udom,$uname);
1.308 albertel 3661: } elsif ($tmp =~ /^(con_lost|no_such_host)/) {
3662: return $tmp;
3663: }
1.218 albertel 3664: }
3665: }
1.95 www 3666:
1.60 www 3667: # -------------------------------------------------------- second, check course
1.96 www 3668:
1.218 albertel 3669: my $coursereply=&courseresdata($ENV{'course.'.$courseid.'.num'},
3670: $ENV{'course.'.$courseid.'.domain'},
3671: ($seclevelr,$seclevelm,$seclevel,
3672: $courselevelr,$courselevelm,
3673: $courselevel));
1.287 albertel 3674: if (defined($coursereply)) { return $coursereply; }
1.200 www 3675:
1.60 www 3676: # ------------------------------------------------------ third, check map parms
1.218 albertel 3677: my %parmhash=();
3678: my $thisparm='';
3679: if (tie(%parmhash,'GDBM_File',
3680: $ENV{'request.course.fn'}.'_parms.db',
1.256 albertel 3681: &GDBM_READER(),0640)) {
1.218 albertel 3682: $thisparm=$parmhash{$symbparm};
3683: untie(%parmhash);
3684: }
3685: if ($thisparm) { return $thisparm; }
3686: }
1.60 www 3687: # --------------------------------------------- last, look in resource metadata
1.71 www 3688:
1.218 albertel 3689: $spacequalifierrest=~s/\./\_/;
1.282 albertel 3690: my $filename;
3691: if (!$symbparm) { $symbparm=&symbread(); }
3692: if ($symbparm) {
1.409 www 3693: $filename=(&decode_symb($symbparm))[2];
1.282 albertel 3694: } else {
3695: $filename=$ENV{'request.filename'};
3696: }
3697: my $metadata=&metadata($filename,$spacequalifierrest);
1.288 albertel 3698: if (defined($metadata)) { return $metadata; }
1.282 albertel 3699: $metadata=&metadata($filename,'parameter_'.$spacequalifierrest);
1.288 albertel 3700: if (defined($metadata)) { return $metadata; }
1.142 www 3701:
1.145 www 3702: # ------------------------------------------------------------------ Cascade up
1.218 albertel 3703: unless ($space eq '0') {
1.336 albertel 3704: my @parts=split(/_/,$space);
3705: my $id=pop(@parts);
3706: my $part=join('_',@parts);
3707: if ($part eq '') { $part='0'; }
3708: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
1.395 albertel 3709: $symbparm,$udom,$uname,$section,1);
1.337 albertel 3710: if (defined($partgeneral)) { return $partgeneral; }
1.218 albertel 3711: }
1.395 albertel 3712: if ($recurse) { return undef; }
3713: my $pack_def=&packages_tab_default($filename,$varname);
3714: if (defined($pack_def)) { return $pack_def; }
1.71 www 3715:
1.48 www 3716: # ---------------------------------------------------- Any other user namespace
3717: } elsif ($realm eq 'environment') {
3718: # ----------------------------------------------------------------- environment
1.219 albertel 3719: if (($uname eq $ENV{'user.name'})&&($udom eq $ENV{'user.domain'})) {
3720: return $ENV{'environment.'.$spacequalifierrest};
3721: } else {
3722: my %returnhash=&userenvironment($udom,$uname,
3723: $spacequalifierrest);
3724: return $returnhash{$spacequalifierrest};
3725: }
1.28 www 3726: } elsif ($realm eq 'system') {
1.48 www 3727: # ----------------------------------------------------------------- system.time
3728: if ($space eq 'time') {
3729: return time;
3730: }
1.28 www 3731: }
1.48 www 3732: return '';
1.61 www 3733: }
3734:
1.395 albertel 3735: sub packages_tab_default {
3736: my ($uri,$varname)=@_;
3737: my (undef,$part,$name)=split(/\./,$varname);
3738: my $packages=&metadata($uri,'packages');
3739: foreach my $package (split(/,/,$packages)) {
3740: my ($pack_type,$pack_part)=split(/_/,$package,2);
3741: if ($pack_part eq $part) {
3742: return $packagetab{"$pack_type&$name&default"};
3743: }
3744: }
3745: return undef;
3746: }
3747:
1.334 albertel 3748: sub add_prefix_and_part {
3749: my ($prefix,$part)=@_;
3750: my $keyroot;
3751: if (defined($prefix) && $prefix !~ /^__/) {
3752: # prefix that has a part already
3753: $keyroot=$prefix;
3754: } elsif (defined($prefix)) {
3755: # prefix that is missing a part
3756: if (defined($part)) { $keyroot='_'.$part.substr($prefix,1); }
3757: } else {
3758: # no prefix at all
3759: if (defined($part)) { $keyroot='_'.$part; }
3760: }
3761: return $keyroot;
3762: }
3763:
1.71 www 3764: # ---------------------------------------------------------------- Get metadata
3765:
3766: sub metadata {
1.176 www 3767: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
1.71 www 3768: $uri=&declutter($uri);
1.288 albertel 3769: # if it is a non metadata possible uri return quickly
1.293 matthew 3770: if (($uri eq '') || (($uri =~ m|^/*adm/|) && ($uri !~ m|^adm/includes|)) ||
1.423 albertel 3771: ($uri =~ m|/$|) || ($uri =~ m|/.meta$|) || ($uri =~ /^~/) ||
3772: ($uri =~ m|home/[^/]+/public_html/|)) {
1.288 albertel 3773: return '';
3774: }
1.73 www 3775: my $filename=$uri;
3776: $uri=~s/\.meta$//;
1.172 www 3777: #
3778: # Is the metadata already cached?
1.177 www 3779: # Look at timestamp of caching
1.172 www 3780: # Everything is cached by the main uri, libraries are never directly cached
3781: #
1.428 albertel 3782: if (!defined($liburi)) {
3783: my ($result,$cached)=&is_cached(\%metacache,$uri,'meta');
3784: if (defined($cached)) { return $result->{':'.$what}; }
3785: }
3786: {
1.172 www 3787: #
3788: # Is this a recursive call for a library?
3789: #
1.428 albertel 3790: my %lcmetacache;
1.171 www 3791: if ($liburi) {
3792: $liburi=&declutter($liburi);
3793: $filename=$liburi;
1.401 bowersj2 3794: } else {
1.428 albertel 3795: &devalidate_cache(\%metacache,$uri,'meta');
1.401 bowersj2 3796: }
1.140 www 3797: my %metathesekeys=();
1.73 www 3798: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
1.335 albertel 3799: my $metastring=&getfile(&filelocation('',&clutter($filename)));
1.208 albertel 3800: my $parser=HTML::LCParser->new(\$metastring);
1.71 www 3801: my $token;
1.140 www 3802: undef %metathesekeys;
1.71 www 3803: while ($token=$parser->get_token) {
1.339 albertel 3804: if ($token->[0] eq 'S') {
3805: if (defined($token->[2]->{'package'})) {
1.172 www 3806: #
3807: # This is a package - get package info
3808: #
1.339 albertel 3809: my $package=$token->[2]->{'package'};
3810: my $keyroot=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3811: if (defined($token->[2]->{'id'})) {
3812: $keyroot.='_'.$token->[2]->{'id'};
3813: }
1.428 albertel 3814: if ($lcmetacache{':packages'}) {
3815: $lcmetacache{':packages'}.=','.$package.$keyroot;
1.339 albertel 3816: } else {
1.428 albertel 3817: $lcmetacache{':packages'}=$package.$keyroot;
1.339 albertel 3818: }
3819: foreach (keys %packagetab) {
1.432 albertel 3820: my $part=$keyroot;
3821: $part=~s/^\_//;
3822: if ($_=~/^\Q$package\E\&/ ||
3823: $_=~/^\Q$package\E_0\&/) {
1.339 albertel 3824: my ($pack,$name,$subp)=split(/\&/,$_);
1.395 albertel 3825: # ignore package.tab specified default values
3826: # here &package_tab_default() will fetch those
3827: if ($subp eq 'default') { next; }
1.339 albertel 3828: my $value=$packagetab{$_};
1.432 albertel 3829: my $unikey;
3830: if ($pack =~ /_0$/) {
3831: $unikey='parameter_0_'.$name;
3832: $part=0;
3833: } else {
3834: $unikey='parameter'.$keyroot.'_'.$name;
3835: }
1.339 albertel 3836: if ($subp eq 'display') {
3837: $value.=' [Part: '.$part.']';
3838: }
1.428 albertel 3839: $lcmetacache{':'.$unikey.'.part'}=$part;
1.395 albertel 3840: $metathesekeys{$unikey}=1;
1.428 albertel 3841: unless (defined($lcmetacache{':'.$unikey.'.'.$subp})) {
3842: $lcmetacache{':'.$unikey.'.'.$subp}=$value;
1.339 albertel 3843: }
1.428 albertel 3844: if (defined($lcmetacache{':'.$unikey.'.default'})) {
3845: $lcmetacache{':'.$unikey}=
3846: $lcmetacache{':'.$unikey.'.default'};
1.356 albertel 3847: }
1.339 albertel 3848: }
3849: }
3850: } else {
1.172 www 3851: #
3852: # This is not a package - some other kind of start tag
1.339 albertel 3853: #
3854: my $entry=$token->[1];
3855: my $unikey;
3856: if ($entry eq 'import') {
3857: $unikey='';
3858: } else {
3859: $unikey=$entry;
3860: }
3861: $unikey.=&add_prefix_and_part($prefix,$token->[2]->{'part'});
3862:
3863: if (defined($token->[2]->{'id'})) {
3864: $unikey.='_'.$token->[2]->{'id'};
3865: }
1.175 www 3866:
1.339 albertel 3867: if ($entry eq 'import') {
1.175 www 3868: #
3869: # Importing a library here
1.339 albertel 3870: #
3871: if ($depthcount<20) {
3872: my $location=$parser->get_text('/import');
3873: my $dir=$filename;
3874: $dir=~s|[^/]*$||;
3875: $location=&filelocation($dir,$location);
3876: foreach (sort(split(/\,/,&metadata($uri,'keys',
3877: $location,$unikey,
3878: $depthcount+1)))) {
3879: $metathesekeys{$_}=1;
3880: }
3881: }
3882: } else {
3883:
3884: if (defined($token->[2]->{'name'})) {
3885: $unikey.='_'.$token->[2]->{'name'};
3886: }
3887: $metathesekeys{$unikey}=1;
3888: foreach (@{$token->[3]}) {
1.428 albertel 3889: $lcmetacache{':'.$unikey.'.'.$_}=$token->[2]->{$_};
1.339 albertel 3890: }
3891: my $internaltext=&HTML::Entities::decode($parser->get_text('/'.$entry));
1.428 albertel 3892: my $default=$lcmetacache{':'.$unikey.'.default'};
1.339 albertel 3893: if ( $internaltext =~ /^\s*$/ && $default !~ /^\s*$/) {
3894: # only ws inside the tag, and not in default, so use default
3895: # as value
1.428 albertel 3896: $lcmetacache{':'.$unikey}=$default;
1.339 albertel 3897: } else {
1.321 albertel 3898: # either something interesting inside the tag or default
3899: # uninteresting
1.428 albertel 3900: $lcmetacache{':'.$unikey}=$internaltext;
1.339 albertel 3901: }
1.172 www 3902: # end of not-a-package not-a-library import
1.339 albertel 3903: }
1.172 www 3904: # end of not-a-package start tag
1.339 albertel 3905: }
1.172 www 3906: # the next is the end of "start tag"
1.339 albertel 3907: }
3908: }
1.338 www 3909: # are there custom rights to evaluate
1.428 albertel 3910: if ($lcmetacache{':copyright'} eq 'custom') {
1.339 albertel 3911:
1.338 www 3912: #
3913: # Importing a rights file here
1.339 albertel 3914: #
3915: unless ($depthcount) {
1.428 albertel 3916: my $location=$lcmetacache{':customdistributionfile'};
1.339 albertel 3917: my $dir=$filename;
3918: $dir=~s|[^/]*$||;
3919: $location=&filelocation($dir,$location);
3920: foreach (sort(split(/\,/,&metadata($uri,'keys',
3921: $location,'_rights',
3922: $depthcount+1)))) {
3923: $metathesekeys{$_}=1;
3924: }
3925: }
3926: }
1.428 albertel 3927: $lcmetacache{':keys'}=join(',',keys %metathesekeys);
3928: &metadata_generate_part0(\%metathesekeys,\%lcmetacache,$uri);
3929: $lcmetacache{':allpossiblekeys'}=join(',',keys %metathesekeys);
3930: &do_cache(\%metacache,$uri,\%lcmetacache,'meta');
1.177 www 3931: # this is the end of "was not already recently cached
1.71 www 3932: }
1.428 albertel 3933: return $metacache{$uri}->{':'.$what};
1.261 albertel 3934: }
3935:
3936: sub metadata_generate_part0 {
3937: my ($metadata,$metacache,$uri) = @_;
3938: my %allnames;
3939: foreach my $metakey (sort keys %$metadata) {
3940: if ($metakey=~/^parameter\_(.*)/) {
1.428 albertel 3941: my $part=$$metacache{':'.$metakey.'.part'};
3942: my $name=$$metacache{':'.$metakey.'.name'};
1.356 albertel 3943: if (! exists($$metadata{'parameter_0_'.$name.'.name'})) {
1.261 albertel 3944: $allnames{$name}=$part;
3945: }
3946: }
3947: }
3948: foreach my $name (keys(%allnames)) {
3949: $$metadata{"parameter_0_$name"}=1;
1.428 albertel 3950: my $key=":parameter_0_$name";
1.261 albertel 3951: $$metacache{"$key.part"}='0';
3952: $$metacache{"$key.name"}=$name;
1.428 albertel 3953: $$metacache{"$key.type"}=$$metacache{':parameter_'.
1.261 albertel 3954: $allnames{$name}.'_'.$name.
3955: '.type'};
1.428 albertel 3956: my $olddis=$$metacache{':parameter_'.$allnames{$name}.'_'.$name.
1.261 albertel 3957: '.display'};
3958: my $expr='\\[Part: '.$allnames{$name}.'\\]';
3959: $olddis=~s/$expr/\[Part: 0\]/;
3960: $$metacache{"$key.display"}=$olddis;
3961: }
1.71 www 3962: }
3963:
1.301 www 3964: # ------------------------------------------------- Get the title of a resource
3965:
3966: sub gettitle {
3967: my $urlsymb=shift;
3968: my $symb=&symbread($urlsymb);
3969: unless ($symb) {
3970: unless ($urlsymb) { $urlsymb=$ENV{'request.filename'}; }
3971: return &metadata($urlsymb,'title');
3972: }
1.425 albertel 3973: my ($result,$cached)=&is_cached(\%titlecache,$symb,'title',600);
1.419 albertel 3974: if (defined($cached)) { return $result; }
1.409 www 3975: my ($map,$resid,$url)=&decode_symb($symb);
1.301 www 3976: my $title='';
3977: my %bighash;
3978: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
3979: &GDBM_READER(),0640)) {
3980: my $mapid=$bighash{'map_pc_'.&clutter($map)};
3981: $title=$bighash{'title_'.$mapid.'.'.$resid};
3982: untie %bighash;
3983: }
1.363 www 3984: $title=~s/\&colon\;/\:/gs;
1.301 www 3985: if ($title) {
1.425 albertel 3986: return &do_cache(\%titlecache,$symb,$title,'title');
1.301 www 3987: } else {
3988: return &metadata($urlsymb,'title');
3989: }
3990: }
3991:
1.31 www 3992: # ------------------------------------------------- Update symbolic store links
3993:
3994: sub symblist {
3995: my ($mapname,%newhash)=@_;
3996: $mapname=declutter($mapname);
3997: my %hash;
3998: if (($ENV{'request.course.fn'}) && (%newhash)) {
3999: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1.256 albertel 4000: &GDBM_WRCREAT(),0640)) {
1.191 harris41 4001: foreach (keys %newhash) {
1.211 www 4002: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1.191 harris41 4003: }
1.31 www 4004: if (untie(%hash)) {
4005: return 'ok';
4006: }
4007: }
4008: }
4009: return 'error';
1.212 www 4010: }
4011:
4012: # --------------------------------------------------------------- Verify a symb
4013:
4014: sub symbverify {
4015: my ($symb,$thisfn)=@_;
1.431 www 4016: $thisfn=&symbclean(&declutter($thisfn));
1.215 www 4017: # direct jump to resource in page or to a sequence - will construct own symbs
4018: if ($thisfn=~/\.(page|sequence)$/) { return 1; }
4019: # check URL part
1.409 www 4020: my ($map,$resid,$url)=&decode_symb($symb);
1.431 www 4021: unless ($url eq $thisfn) { return 0; }
1.213 www 4022:
1.216 www 4023: $symb=&symbclean($symb);
1.213 www 4024:
4025: my %bighash;
4026: my $okay=0;
1.431 www 4027:
1.213 www 4028: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1.256 albertel 4029: &GDBM_READER(),0640)) {
1.280 www 4030: my $ids=$bighash{'ids_'.&clutter($thisfn)};
1.216 www 4031: unless ($ids) {
4032: $ids=$bighash{'ids_/'.$thisfn};
4033: }
4034: if ($ids) {
4035: # ------------------------------------------------------------------- Has ID(s)
4036: foreach (split(/\,/,$ids)) {
4037: my ($mapid,$resid)=split(/\./,$_);
4038: if (
4039: &symbclean(&declutter($bighash{'map_id_'.$mapid}).'___'.$resid.'___'.$thisfn)
4040: eq $symb) {
4041: $okay=1;
4042: }
4043: }
4044: }
1.213 www 4045: untie(%bighash);
4046: }
4047: return $okay;
1.31 www 4048: }
4049:
1.210 www 4050: # --------------------------------------------------------------- Clean-up symb
4051:
4052: sub symbclean {
4053: my $symb=shift;
1.213 www 4054:
1.210 www 4055: # remove version from map
4056: $symb=~s/\.(\d+)\.(\w+)\_\_\_/\.$2\_\_\_/;
1.215 www 4057:
1.210 www 4058: # remove version from URL
4059: $symb=~s/\.(\d+)\.(\w+)$/\.$2/;
1.213 www 4060:
1.210 www 4061: return $symb;
1.409 www 4062: }
4063:
4064: # ---------------------------------------------- Split symb to find map and url
1.429 albertel 4065:
4066: sub encode_symb {
4067: my ($map,$resid,$url)=@_;
4068: return &symbclean(&declutter($map).'___'.$resid.'___'.&declutter($url));
4069: }
1.409 www 4070:
4071: sub decode_symb {
1.413 www 4072: my ($map,$resid,$url)=split(/\_\_\_/,shift);
4073: return (&fixversion($map),$resid,&fixversion($url));
4074: }
4075:
4076: sub fixversion {
4077: my $fn=shift;
4078: if ($fn=~/^(adm|uploaded|public)/) { return $fn; }
1.435 ! www 4079: my %bighash;
! 4080: my $uri=&clutter($fn);
! 4081: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
! 4082: &GDBM_READER(),0640)) {
! 4083: if ($bighash{'version_'.$uri}) {
! 4084: my $version=$bighash{'version_'.$uri};
! 4085: unless ($version eq 'mostrecent') {
! 4086: $uri=~s/\.(\w+)$/\.$version\.$1/;
! 4087: }
! 4088: }
! 4089: untie %bighash;
1.413 www 4090: }
1.435 ! www 4091: return &declutter($uri);
1.210 www 4092: }
4093:
1.31 www 4094: # ------------------------------------------------------ Return symb list entry
4095:
4096: sub symbread {
1.249 www 4097: my ($thisfn,$donotrecurse)=@_;
1.242 www 4098: # no filename provided? try from environment
1.44 www 4099: unless ($thisfn) {
1.210 www 4100: if ($ENV{'request.symb'}) { return &symbclean($ENV{'request.symb'}); }
1.44 www 4101: $thisfn=$ENV{'request.filename'};
4102: }
1.242 www 4103: # is that filename actually a symb? Verify, clean, and return
4104: if ($thisfn=~/\_\_\_\d+\_\_\_(.*)$/) {
4105: if (&symbverify($thisfn,$1)) { return &symbclean($thisfn); }
4106: }
1.44 www 4107: $thisfn=declutter($thisfn);
1.31 www 4108: my %hash;
1.37 www 4109: my %bighash;
4110: my $syval='';
1.45 www 4111: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1.31 www 4112: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1.256 albertel 4113: &GDBM_READER(),0640)) {
1.31 www 4114: $syval=$hash{$thisfn};
1.37 www 4115: untie(%hash);
4116: }
4117: # ---------------------------------------------------------- There was an entry
4118: if ($syval) {
4119: unless ($syval=~/\_\d+$/) {
4120: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1.44 www 4121: &appenv('request.ambiguous' => $thisfn);
1.37 www 4122: return '';
4123: }
4124: $syval.=$1;
4125: }
4126: } else {
4127: # ------------------------------------------------------- Was not in symb table
4128: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1.256 albertel 4129: &GDBM_READER(),0640)) {
1.37 www 4130: # ---------------------------------------------- Get ID(s) for current resource
1.280 www 4131: my $ids=$bighash{'ids_'.&clutter($thisfn)};
1.65 www 4132: unless ($ids) {
4133: $ids=$bighash{'ids_/'.$thisfn};
1.242 www 4134: }
4135: unless ($ids) {
4136: # alias?
4137: $ids=$bighash{'mapalias_'.$thisfn};
1.65 www 4138: }
1.37 www 4139: if ($ids) {
4140: # ------------------------------------------------------------------- Has ID(s)
4141: my @possibilities=split(/\,/,$ids);
1.39 www 4142: if ($#possibilities==0) {
4143: # ----------------------------------------------- There is only one possibility
1.37 www 4144: my ($mapid,$resid)=split(/\./,$ids);
4145: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1.249 www 4146: } elsif (!$donotrecurse) {
1.39 www 4147: # ------------------------------------------ There is more than one possibility
4148: my $realpossible=0;
1.191 harris41 4149: foreach (@possibilities) {
1.39 www 4150: my $file=$bighash{'src_'.$_};
4151: if (&allowed('bre',$file)) {
4152: my ($mapid,$resid)=split(/\./,$_);
4153: if ($bighash{'map_type_'.$mapid} ne 'page') {
4154: $realpossible++;
4155: $syval=declutter($bighash{'map_id_'.$mapid}).
4156: '___'.$resid;
4157: }
4158: }
1.191 harris41 4159: }
1.39 www 4160: if ($realpossible!=1) { $syval=''; }
1.249 www 4161: } else {
4162: $syval='';
1.37 www 4163: }
4164: }
4165: untie(%bighash)
4166: }
1.31 www 4167: }
1.62 www 4168: if ($syval) {
1.210 www 4169: return &symbclean($syval.'___'.$thisfn);
1.62 www 4170: }
1.31 www 4171: }
1.44 www 4172: &appenv('request.ambiguous' => $thisfn);
1.31 www 4173: return '';
4174: }
4175:
4176: # ---------------------------------------------------------- Return random seed
4177:
1.32 www 4178: sub numval {
4179: my $txt=shift;
4180: $txt=~tr/A-J/0-9/;
4181: $txt=~tr/a-j/0-9/;
4182: $txt=~tr/K-T/0-9/;
4183: $txt=~tr/k-t/0-9/;
4184: $txt=~tr/U-Z/0-5/;
4185: $txt=~tr/u-z/0-5/;
4186: $txt=~s/\D//g;
4187: return int($txt);
1.368 albertel 4188: }
4189:
4190: sub latest_rnd_algorithm_id {
4191: return '64bit';
1.366 albertel 4192: }
1.32 www 4193:
1.31 www 4194: sub rndseed {
1.155 albertel 4195: my ($symb,$courseid,$domain,$username)=@_;
1.366 albertel 4196:
4197: my ($wsymb,$wcourseid,$wdomain,$wusername)=&Apache::lonxml::whichuser();
1.155 albertel 4198: if (!$symb) {
1.366 albertel 4199: unless ($symb=$wsymb) { return time; }
4200: }
4201: if (!$courseid) { $courseid=$wcourseid; }
4202: if (!$domain) { $domain=$wdomain; }
4203: if (!$username) { $username=$wusername }
4204: my $which=$ENV{"course.$courseid.rndseed"};
4205: my $CODE=$ENV{'scantron.CODE'};
4206: if (defined($CODE)) {
4207: &rndseed_CODE_64bit($symb,$courseid,$domain,$username);
4208: } elsif ($which eq '64bit') {
4209: return &rndseed_64bit($symb,$courseid,$domain,$username);
4210: }
4211: return &rndseed_32bit($symb,$courseid,$domain,$username);
4212: }
4213:
4214: sub rndseed_32bit {
4215: my ($symb,$courseid,$domain,$username)=@_;
4216: {
4217: use integer;
4218: my $symbchck=unpack("%32C*",$symb) << 27;
4219: my $symbseed=numval($symb) << 22;
4220: my $namechck=unpack("%32C*",$username) << 17;
4221: my $nameseed=numval($username) << 12;
4222: my $domainseed=unpack("%32C*",$domain) << 7;
4223: my $courseseed=unpack("%32C*",$courseid);
4224: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
4225: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4226: #&Apache::lonxml::debug("rndseed :$num:$symb");
4227: return $num;
4228: }
4229: }
4230:
4231: sub rndseed_64bit {
4232: my ($symb,$courseid,$domain,$username)=@_;
4233: {
4234: use integer;
4235: my $symbchck=unpack("%32S*",$symb) << 21;
4236: my $symbseed=numval($symb) << 10;
4237: my $namechck=unpack("%32S*",$username);
4238:
4239: my $nameseed=numval($username) << 21;
4240: my $domainseed=unpack("%32S*",$domain) << 10;
4241: my $courseseed=unpack("%32S*",$courseid);
4242:
4243: my $num1=$symbchck+$symbseed+$namechck;
4244: my $num2=$nameseed+$domainseed+$courseseed;
4245: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
4246: #&Apache::lonxml::debug("rndseed :$num:$symb");
4247: return "$num1,$num2";
1.155 albertel 4248: }
1.366 albertel 4249: }
4250:
4251: sub rndseed_CODE_64bit {
4252: my ($symb,$courseid,$domain,$username)=@_;
1.155 albertel 4253: {
1.366 albertel 4254: use integer;
4255: my $symbchck=unpack("%32S*",$symb) << 16;
4256: my $symbseed=numval($symb);
4257: my $CODEseed=numval($ENV{'scantron.CODE'}) << 16;
4258: my $courseseed=unpack("%32S*",$courseid);
4259: my $num1=$symbseed+$CODEseed;
4260: my $num2=$courseseed+$symbchck;
4261: #&Apache::lonxml::debug("$symbseed:$CODEseed|$courseseed:$symbchck");
4262: #&Apache::lonxml::debug("rndseed :$num1:$num2:$symb");
4263: return "$num1,$num2";
4264: }
4265: }
4266:
4267: sub setup_random_from_rndseed {
4268: my ($rndseed)=@_;
4269: if ($rndseed =~/,/) {
4270: my ($num1,$num2)=split(/,/,$rndseed);
4271: &Math::Random::random_set_seed(abs($num1),abs($num2));
4272: } else {
4273: &Math::Random::random_set_seed_from_phrase($rndseed);
1.98 albertel 4274: }
1.36 albertel 4275: }
4276:
1.76 www 4277: sub ireceipt {
4278: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
4279: my $cuname=unpack("%32C*",$funame);
4280: my $cudom=unpack("%32C*",$fudom);
4281: my $cucourseid=unpack("%32C*",$fucourseid);
4282: my $cusymb=unpack("%32C*",$fusymb);
1.77 www 4283: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
1.76 www 4284: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
4285: ($cunique%$cuname+
4286: $cunique%$cudom+
4287: $cusymb%$cuname+
4288: $cusymb%$cudom+
4289: $cucourseid%$cuname+
4290: $cucourseid%$cudom);
4291: }
4292:
4293: sub receipt {
1.260 ng 4294: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
4295: return &ireceipt($name,$domain,$courseid,$symb);
1.76 www 4296: }
1.260 ng 4297:
1.36 albertel 4298: # ------------------------------------------------------------ Serves up a file
4299: # returns either the contents of the file or a -1
4300: sub getfile {
1.269 www 4301: my $file=shift;
4302: if ($file=~/^\/*uploaded\//) { # user file
4303: my $ua=new LWP::UserAgent;
4304: my $request=new HTTP::Request('GET',&tokenwrapper($file));
4305: my $response=$ua->request($request);
4306: if ($response->is_success()) {
4307: return $response->content;
4308: } else {
4309: return -1;
4310: }
4311: } else { # normal file from res space
1.37 www 4312: &repcopy($file);
1.36 albertel 4313: if (! -e $file ) { return -1; };
4314: my $fh=Apache::File->new($file);
4315: my $a='';
4316: while (<$fh>) { $a .=$_; }
1.269 www 4317: return $a;
4318: }
1.36 albertel 4319: }
4320:
4321: sub filelocation {
4322: my ($dir,$file) = @_;
4323: my $location;
4324: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
1.59 albertel 4325: if ($file=~m:^/~:) { # is a contruction space reference
4326: $location = $file;
4327: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
1.270 www 4328: } elsif ($file=~/^\/*uploaded/) { # is an uploaded file
4329: $location=$file;
1.36 albertel 4330: } else {
1.59 albertel 4331: $file=~s/^$perlvar{'lonDocRoot'}//;
4332: $file=~s:^/*res::;
4333: if ( !( $file =~ m:^/:) ) {
4334: $location = $dir. '/'.$file;
4335: } else {
4336: $location = '/home/httpd/html/res'.$file;
4337: }
1.36 albertel 4338: }
4339: $location=~s://+:/:g; # remove duplicate /
1.46 www 4340: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
4341: return $location;
4342: }
1.36 albertel 4343:
1.46 www 4344: sub hreflocation {
4345: my ($dir,$file)=@_;
1.191 harris41 4346: unless (($file=~/^http:\/\//i) || ($file=~/^\//)) {
1.46 www 4347: my $finalpath=filelocation($dir,$file);
4348: $finalpath=~s/^\/home\/httpd\/html//;
1.225 albertel 4349: $finalpath=~s-/home/(\w+)/public_html/-/~$1/-;
1.46 www 4350: return $finalpath;
4351: } else {
4352: return $file;
4353: }
1.31 www 4354: }
4355:
4356: # ------------------------------------------------------------- Declutters URLs
4357:
4358: sub declutter {
4359: my $thisfn=shift;
4360: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
4361: $thisfn=~s/^\///;
4362: $thisfn=~s/^res\///;
1.235 www 4363: $thisfn=~s/\?.+$//;
1.268 www 4364: return $thisfn;
4365: }
4366:
4367: # ------------------------------------------------------------- Clutter up URLs
4368:
4369: sub clutter {
4370: my $thisfn='/'.&declutter(shift);
1.270 www 4371: unless ($thisfn=~/^\/(uploaded|adm|userfiles|ext|raw|priv)\//) {
4372: $thisfn='/res'.$thisfn;
4373: }
1.31 www 4374: return $thisfn;
1.12 www 4375: }
4376:
4377: # -------------------------------------------------------- Escape Special Chars
4378:
4379: sub escape {
4380: my $str=shift;
4381: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
4382: return $str;
4383: }
4384:
4385: # ----------------------------------------------------- Un-Escape Special Chars
4386:
4387: sub unescape {
4388: my $str=shift;
4389: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
4390: return $str;
4391: }
1.11 www 4392:
1.415 albertel 4393: sub mod_perl_version {
4394: if (defined($perlvar{'MODPERL2'})) {
4395: return 2;
4396: }
4397: return 1;
4398: }
1.1 albertel 4399: # ================================================================ Main Program
4400:
1.184 www 4401: sub goodbye {
1.204 albertel 4402: &logthis("Starting Shut down");
1.425 albertel 4403: #not converted to using infrastruture
4404: &logthis(sprintf("%-20s is %s",'%homecache',scalar(%homecache)));
4405: &logthis(sprintf("%-20s is %s",'%badServerCache',scalar(%badServerCache)));
4406: &logthis(sprintf("%-20s is %s",'%metacache',scalar(%metacache)));
4407: #converted
4408: &logthis(sprintf("%-20s is %s",'%titlecache',scalar(%titlecache)));
4409: &logthis(sprintf("%-20s is %s",'%courseresdatacache',scalar(%courseresdatacache)));
4410: #1.1 only
4411: &logthis(sprintf("%-20s is %s",'%userresdatacache',scalar(%userresdatacache)));
4412: &logthis(sprintf("%-20s is %s",'%usectioncache',scalar(%usectioncache)));
1.184 www 4413: &flushcourselogs();
4414: &logthis("Shutting down");
1.362 albertel 4415: return DONE;
1.184 www 4416: }
4417:
1.179 www 4418: BEGIN {
1.228 harris41 4419: # ----------------------------------- Read loncapa.conf and loncapa_apache.conf
1.195 www 4420: unless ($readit) {
1.217 harris41 4421: {
4422: my $config=Apache::File->new("/etc/httpd/conf/loncapa.conf");
4423:
4424: while (my $configline=<$config>) {
4425: if ($configline =~ /^[^\#]*PerlSetVar/) {
1.1 albertel 4426: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
1.8 www 4427: chomp($varvalue);
1.1 albertel 4428: $perlvar{$varname}=$varvalue;
4429: }
4430: }
4431: }
1.227 harris41 4432: {
4433: my $config=Apache::File->new("/etc/httpd/conf/loncapa_apache.conf");
4434:
4435: while (my $configline=<$config>) {
4436: if ($configline =~ /^[^\#]*PerlSetVar/) {
4437: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
4438: chomp($varvalue);
4439: $perlvar{$varname}=$varvalue;
4440: }
4441: }
4442: }
1.1 albertel 4443:
1.327 albertel 4444: # ------------------------------------------------------------ Read domain file
4445: {
4446: my $fh=Apache::File->new($Apache::lonnet::perlvar{'lonTabDir'}.
4447: '/domain.tab');
4448: %domaindescription = ();
4449: %domain_auth_def = ();
4450: %domain_auth_arg_def = ();
4451: if ($fh) {
4452: while (<$fh>) {
1.390 matthew 4453: next if (/^(\#|\s*$)/);
4454: # next if /^\#/;
1.327 albertel 4455: chomp;
1.403 www 4456: my ($domain, $domain_description, $def_auth, $def_auth_arg,
4457: $def_lang, $city, $longi, $lati) = split(/:/,$_);
4458: $domain_auth_def{$domain}=$def_auth;
1.327 albertel 4459: $domain_auth_arg_def{$domain}=$def_auth_arg;
1.403 www 4460: $domaindescription{$domain}=$domain_description;
4461: $domain_lang_def{$domain}=$def_lang;
4462: $domain_city{$domain}=$city;
4463: $domain_longi{$domain}=$longi;
4464: $domain_lati{$domain}=$lati;
4465:
1.327 albertel 4466: # &logthis("Domain.tab: $domain, $domain_auth_def{$domain}, $domain_auth_arg_def{$domain},$domaindescription{$domain}");
4467: # &logthis("Domain.tab: $domain ".$domaindescription{$domain} );
4468: }
4469: }
4470: }
4471:
4472:
1.1 albertel 4473: # ------------------------------------------------------------- Read hosts file
4474: {
4475: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
4476:
4477: while (my $configline=<$config>) {
1.303 matthew 4478: next if ($configline =~ /^(\#|\s*$)/);
1.154 www 4479: chomp($configline);
1.245 www 4480: my ($id,$domain,$role,$name,$ip,$domdescr)=split(/:/,$configline);
1.252 albertel 4481: if ($id && $domain && $role && $name && $ip) {
4482: $hostname{$id}=$name;
4483: $hostdom{$id}=$domain;
4484: $hostip{$id}=$ip;
1.300 albertel 4485: $iphost{$ip}=$id;
1.252 albertel 4486: if ($role eq 'library') { $libserv{$id}=$name; }
4487: } else {
4488: if ($configline) {
4489: &logthis("Skipping hosts.tab line -$configline-");
4490: }
1.245 www 4491: }
1.1 albertel 4492: }
4493: }
4494:
4495: # ------------------------------------------------------ Read spare server file
4496: {
4497: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
4498:
4499: while (my $configline=<$config>) {
4500: chomp($configline);
1.284 matthew 4501: if ($configline) {
1.1 albertel 4502: $spareid{$configline}=1;
4503: }
4504: }
4505: }
1.11 www 4506: # ------------------------------------------------------------ Read permissions
4507: {
4508: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
4509:
4510: while (my $configline=<$config>) {
4511: chomp($configline);
1.160 www 4512: if ($configline) {
1.11 www 4513: my ($role,$perm)=split(/ /,$configline);
4514: if ($perm ne '') { $pr{$role}=$perm; }
1.160 www 4515: }
1.11 www 4516: }
4517: }
4518:
4519: # -------------------------------------------- Read plain texts for permissions
4520: {
4521: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
4522:
4523: while (my $configline=<$config>) {
4524: chomp($configline);
1.160 www 4525: if ($configline) {
1.11 www 4526: my ($short,$plain)=split(/:/,$configline);
4527: if ($plain ne '') { $prp{$short}=$plain; }
1.160 www 4528: }
1.135 www 4529: }
4530: }
4531:
4532: # ---------------------------------------------------------- Read package table
4533: {
4534: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
4535:
4536: while (my $configline=<$config>) {
4537: chomp($configline);
4538: my ($short,$plain)=split(/:/,$configline);
1.143 www 4539: my ($pack,$name)=split(/\&/,$short);
4540: if ($plain ne '') {
4541: $packagetab{$pack.'&'.$name.'&name'}=$name;
4542: $packagetab{$short}=$plain;
1.25 www 4543: }
1.11 www 4544: }
1.329 matthew 4545: }
4546:
4547: # ------------- set up temporary directory
4548: {
4549: $tmpdir = $perlvar{'lonDaemons'}.'/tmp/';
4550:
1.11 www 4551: }
4552:
1.71 www 4553: %metacache=();
1.185 www 4554:
1.281 www 4555: $processmarker='_'.time.'_'.$perlvar{'lonHostID'};
1.186 www 4556: $dumpcount=0;
1.22 www 4557:
1.163 harris41 4558: &logtouch();
1.12 www 4559: &logthis('<font color=yellow>INFO: Read configuration</font>');
1.195 www 4560: $readit=1;
4561: }
1.1 albertel 4562: }
1.179 www 4563:
1.1 albertel 4564: 1;
1.191 harris41 4565: __END__
4566:
1.243 albertel 4567: =pod
4568:
1.191 harris41 4569: =head1 NAME
4570:
1.243 albertel 4571: Apache::lonnet - Subroutines to ask questions about things in the network.
1.191 harris41 4572:
4573: =head1 SYNOPSIS
4574:
1.243 albertel 4575: Invoked by other LON-CAPA modules, when they need to talk to or about objects in the network.
1.191 harris41 4576:
4577: &Apache::lonnet::SUBROUTINENAME(ARGUMENTS);
4578:
1.243 albertel 4579: Common parameters:
4580:
4581: =over 4
4582:
4583: =item *
4584:
4585: $uname : an internal username (if $cname expecting a course Id specifically)
4586:
4587: =item *
4588:
4589: $udom : a domain (if $cdom expecting a course's domain specifically)
4590:
4591: =item *
4592:
4593: $symb : a resource instance identifier
4594:
4595: =item *
4596:
4597: $namespace : the name of a .db file that contains the data needed or
4598: being set.
4599:
4600: =back
4601:
1.394 bowersj2 4602: =head1 OVERVIEW
1.191 harris41 4603:
1.394 bowersj2 4604: lonnet provides subroutines which interact with the
4605: lonc/lond (TCP) network layer of LON-CAPA. They can be used to ask
4606: about classes, users, and resources.
1.243 albertel 4607:
4608: For many of these objects you can also use this to store data about
4609: them or modify them in various ways.
1.191 harris41 4610:
1.394 bowersj2 4611: =head2 Symbs
1.191 harris41 4612:
1.394 bowersj2 4613: To identify a specific instance of a resource, LON-CAPA uses symbols
4614: or "symbs"X<symb>. These identifiers are built from the URL of the
4615: map, the resource number of the resource in the map, and the URL of
4616: the resource itself. The latter is somewhat redundant, but might help
4617: if maps change.
4618:
4619: An example is
4620:
4621: msu/korte/parts/part1.sequence___19___msu/korte/tests/part12.problem
4622:
4623: The respective map entry is
4624:
4625: <resource id="19" src="/res/msu/korte/tests/part12.problem"
4626: title="Problem 2">
4627: </resource>
4628:
4629: Symbs are used by the random number generator, as well as to store and
4630: restore data specific to a certain instance of for example a problem.
4631:
4632: =head2 Storing And Retrieving Data
4633:
4634: X<store()>X<cstore()>X<restore()>Three of the most important functions
4635: in C<lonnet.pm> are C<&Apache::lonnet::cstore()>,
4636: C<&Apache::lonnet:restore()>, and C<&Apache::lonnet::store()>, which
4637: is is the non-critical message twin of cstore. These functions are for
4638: handlers to store a perl hash to a user's permanent data space in an
4639: easy manner, and to retrieve it again on another call. It is expected
4640: that a handler would use this once at the beginning to retrieve data,
4641: and then again once at the end to send only the new data back.
4642:
4643: The data is stored in the user's data directory on the user's
4644: homeserver under the ID of the course.
4645:
4646: The hash that is returned by restore will have all of the previous
4647: value for all of the elements of the hash.
4648:
4649: Example:
4650:
4651: #creating a hash
4652: my %hash;
4653: $hash{'foo'}='bar';
4654:
4655: #storing it
4656: &Apache::lonnet::cstore(\%hash);
4657:
4658: #changing a value
4659: $hash{'foo'}='notbar';
4660:
4661: #adding a new value
4662: $hash{'bar'}='foo';
4663: &Apache::lonnet::cstore(\%hash);
4664:
4665: #retrieving the hash
4666: my %history=&Apache::lonnet::restore();
4667:
4668: #print the hash
4669: foreach my $key (sort(keys(%history))) {
4670: print("\%history{$key} = $history{$key}");
4671: }
4672:
4673: Will print out:
1.191 harris41 4674:
1.394 bowersj2 4675: %history{1:foo} = bar
4676: %history{1:keys} = foo:timestamp
4677: %history{1:timestamp} = 990455579
4678: %history{2:bar} = foo
4679: %history{2:foo} = notbar
4680: %history{2:keys} = foo:bar:timestamp
4681: %history{2:timestamp} = 990455580
4682: %history{bar} = foo
4683: %history{foo} = notbar
4684: %history{timestamp} = 990455580
4685: %history{version} = 2
4686:
4687: Note that the special hash entries C<keys>, C<version> and
4688: C<timestamp> were added to the hash. C<version> will be equal to the
4689: total number of versions of the data that have been stored. The
4690: C<timestamp> attribute will be the UNIX time the hash was
4691: stored. C<keys> is available in every historical section to list which
4692: keys were added or changed at a specific historical revision of a
4693: hash.
4694:
4695: B<Warning>: do not store the hash that restore returns directly. This
4696: will cause a mess since it will restore the historical keys as if the
4697: were new keys. I.E. 1:foo will become 1:1:foo etc.
1.191 harris41 4698:
1.394 bowersj2 4699: Calling convention:
1.191 harris41 4700:
1.394 bowersj2 4701: my %record=&Apache::lonnet::restore($symb,$courseid,$domain,$uname,$home);
4702: &Apache::lonnet::cstore(\%newrecord,$symb,$courseid,$domain,$uname,$home);
1.191 harris41 4703:
1.394 bowersj2 4704: For more detailed information, see lonnet specific documentation.
1.191 harris41 4705:
1.394 bowersj2 4706: =head1 RETURN MESSAGES
1.191 harris41 4707:
1.394 bowersj2 4708: =over 4
1.191 harris41 4709:
1.394 bowersj2 4710: =item * B<con_lost>: unable to contact remote host
1.191 harris41 4711:
1.394 bowersj2 4712: =item * B<con_delayed>: unable to contact remote host, message will be delivered
4713: when the connection is brought back up
1.191 harris41 4714:
1.394 bowersj2 4715: =item * B<con_failed>: unable to contact remote host and unable to save message
4716: for later delivery
1.191 harris41 4717:
1.394 bowersj2 4718: =item * B<error:>: an error a occured, a description of the error follows the :
1.191 harris41 4719:
1.394 bowersj2 4720: =item * B<no_such_host>: unable to fund a host associated with the user/domain
1.243 albertel 4721: that was requested
1.191 harris41 4722:
1.243 albertel 4723: =back
1.191 harris41 4724:
1.243 albertel 4725: =head1 PUBLIC SUBROUTINES
1.191 harris41 4726:
1.243 albertel 4727: =head2 Session Environment Functions
1.191 harris41 4728:
1.243 albertel 4729: =over 4
1.191 harris41 4730:
1.394 bowersj2 4731: =item *
4732: X<appenv()>
4733: B<appenv(%hash)>: the value of %hash is written to
4734: the user envirnoment file, and will be restored for each access this
4735: user makes during this session, also modifies the %ENV for the current
4736: process
1.191 harris41 4737:
4738: =item *
1.394 bowersj2 4739: X<delenv()>
4740: B<delenv($regexp)>: removes all items from the session
4741: environment file that matches the regular expression in $regexp. The
4742: values are also delted from the current processes %ENV.
1.191 harris41 4743:
1.243 albertel 4744: =back
4745:
4746: =head2 User Information
1.191 harris41 4747:
1.243 albertel 4748: =over 4
1.191 harris41 4749:
4750: =item *
1.394 bowersj2 4751: X<queryauthenticate()>
4752: B<queryauthenticate($uname,$udom)>: try to determine user's current
1.191 harris41 4753: authentication scheme
4754:
4755: =item *
1.394 bowersj2 4756: X<authenticate()>
4757: B<authenticate($uname,$upass,$udom)>: try to
4758: authenticate user from domain's lib servers (first use the current
4759: one). C<$upass> should be the users password.
1.191 harris41 4760:
4761: =item *
1.394 bowersj2 4762: X<homeserver()>
4763: B<homeserver($uname,$udom)>: find the server which has
4764: the user's directory and files (there must be only one), this caches
4765: the answer, and also caches if there is a borken connection.
1.191 harris41 4766:
4767: =item *
1.394 bowersj2 4768: X<idget()>
4769: B<idget($udom,@ids)>: find the usernames behind a list of IDs
4770: (IDs are a unique resource in a domain, there must be only 1 ID per
4771: username, and only 1 username per ID in a specific domain) (returns
4772: hash: id=>name,id=>name)
1.191 harris41 4773:
4774: =item *
1.394 bowersj2 4775: X<idrget()>
4776: B<idrget($udom,@unames)>: find the IDs behind a list of
4777: usernames (returns hash: name=>id,name=>id)
1.191 harris41 4778:
4779: =item *
1.394 bowersj2 4780: X<idput()>
4781: B<idput($udom,%ids)>: store away a list of names and associated IDs
1.191 harris41 4782:
4783: =item *
1.394 bowersj2 4784: X<rolesinit()>
4785: B<rolesinit($udom,$username,$authhost)>: get user privileges
1.243 albertel 4786:
4787: =item *
1.394 bowersj2 4788: X<usection()>
4789: B<usection($udom,$uname,$cname)>: finds the section of student in the
1.243 albertel 4790: course $cname, return section name/number or '' for "not in course"
4791: and '-1' for "no section"
4792:
4793: =item *
1.394 bowersj2 4794: X<userenvironment()>
4795: B<userenvironment($udom,$uname,@what)>: gets the values of the keys
1.243 albertel 4796: passed in @what from the requested user's environment, returns a hash
4797:
4798: =back
4799:
4800: =head2 User Roles
4801:
4802: =over 4
4803:
4804: =item *
4805:
4806: allowed($priv,$uri) : check for a user privilege; returns codes for allowed
4807: actions
4808: F: full access
4809: U,I,K: authentication modes (cxx only)
4810: '': forbidden
4811: 1: user needs to choose course
4812: 2: browse allowed
4813:
4814: =item *
4815:
4816: definerole($rolename,$sysrole,$domrole,$courole) : define role; define a custom
4817: role rolename set privileges in format of lonTabs/roles.tab for system, domain,
4818: and course level
4819:
4820: =item *
4821:
4822: plaintext($short) : return value in %prp hash (rolesplain.tab); plain text
4823: explanation of a user role term
4824:
4825: =back
4826:
4827: =head2 User Modification
4828:
4829: =over 4
4830:
4831: =item *
4832:
4833: assignrole($udom,$uname,$url,$role,$end,$start) : assign role; give a role to a
4834: user for the level given by URL. Optional start and end dates (leave empty
4835: string or zero for "no date")
1.191 harris41 4836:
4837: =item *
4838:
1.243 albertel 4839: changepass($uname,$udom,$currentpass,$newpass,$server) : attempts to
4840: change a users, password, possible return values are: ok,
4841: pwchange_failure, non_authorized, auth_mode_error, unknown_user,
4842: refused
1.191 harris41 4843:
4844: =item *
4845:
1.243 albertel 4846: modifyuserauth($udom,$uname,$umode,$upass) : modify user authentication
1.191 harris41 4847:
4848: =item *
4849:
1.243 albertel 4850: modifyuser($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene) :
4851: modify user
1.191 harris41 4852:
4853: =item *
4854:
1.286 matthew 4855: modifystudent
4856:
4857: modify a students enrollment and identification information.
4858: The course id is resolved based on the current users environment.
4859: This means the envoking user must be a course coordinator or otherwise
4860: associated with a course.
4861:
1.297 matthew 4862: This call is essentially a wrapper for lonnet::modifyuser and
4863: lonnet::modify_student_enrollment
1.286 matthew 4864:
4865: Inputs:
4866:
4867: =over 4
4868:
4869: =item B<$udom> Students loncapa domain
4870:
4871: =item B<$uname> Students loncapa login name
4872:
4873: =item B<$uid> Students id/student number
4874:
4875: =item B<$umode> Students authentication mode
4876:
4877: =item B<$upass> Students password
4878:
4879: =item B<$first> Students first name
4880:
4881: =item B<$middle> Students middle name
4882:
4883: =item B<$last> Students last name
4884:
4885: =item B<$gene> Students generation
4886:
4887: =item B<$usec> Students section in course
4888:
4889: =item B<$end> Unix time of the roles expiration
4890:
4891: =item B<$start> Unix time of the roles start date
4892:
4893: =item B<$forceid> If defined, allow $uid to be changed
4894:
4895: =item B<$desiredhome> server to use as home server for student
4896:
4897: =back
1.297 matthew 4898:
4899: =item *
4900:
4901: modify_student_enrollment
4902:
4903: Change a students enrollment status in a class. The environment variable
4904: 'role.request.course' must be defined for this function to proceed.
4905:
4906: Inputs:
4907:
4908: =over 4
4909:
4910: =item $udom, students domain
4911:
4912: =item $uname, students name
4913:
4914: =item $uid, students user id
4915:
4916: =item $first, students first name
4917:
4918: =item $middle
4919:
4920: =item $last
4921:
4922: =item $gene
4923:
4924: =item $usec
4925:
4926: =item $end
4927:
4928: =item $start
4929:
4930: =back
4931:
1.191 harris41 4932:
4933: =item *
4934:
1.243 albertel 4935: assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start) : assign
4936: custom role; give a custom role to a user for the level given by URL. Specify
4937: name and domain of role author, and role name
1.191 harris41 4938:
4939: =item *
4940:
1.243 albertel 4941: revokerole($udom,$uname,$url,$role) : revoke a role for url
1.191 harris41 4942:
4943: =item *
4944:
1.243 albertel 4945: revokecustomrole($udom,$uname,$url,$role) : revoke a custom role
4946:
4947: =back
4948:
4949: =head2 Course Infomation
4950:
4951: =over 4
1.191 harris41 4952:
4953: =item *
4954:
1.243 albertel 4955: coursedescription($courseid) : course description
1.191 harris41 4956:
4957: =item *
4958:
1.243 albertel 4959: courseresdata($coursenum,$coursedomain,@which) : request for current
4960: parameter setting for a specific course, @what should be a list of
4961: parameters to ask about. This routine caches answers for 5 minutes.
4962:
4963: =back
4964:
4965: =head2 Course Modification
4966:
4967: =over 4
1.191 harris41 4968:
4969: =item *
4970:
1.243 albertel 4971: writecoursepref($courseid,%prefs) : write preferences (environment
4972: database) for a course
1.191 harris41 4973:
4974: =item *
4975:
1.243 albertel 4976: createcourse($udom,$description,$url) : make/modify course
4977:
4978: =back
4979:
4980: =head2 Resource Subroutines
4981:
4982: =over 4
1.191 harris41 4983:
4984: =item *
4985:
1.243 albertel 4986: subscribe($fname) : subscribe to a resource, returns URL if possible (probably should use repcopy instead)
1.191 harris41 4987:
4988: =item *
4989:
1.243 albertel 4990: repcopy($filename) : subscribes to the requested file, and attempts to
4991: replicate from the owning library server, Might return
4992: HTTP_SERVICE_UNAVAILABLE, HTTP_NOT_FOUND, FORBIDDEN, OK, or
4993: HTTP_BAD_REQUEST, also attempts to grab the metadata for the
4994: resource. Expects the local filesystem pathname
4995: (/home/httpd/html/res/....)
4996:
4997: =back
4998:
4999: =head2 Resource Information
5000:
5001: =over 4
1.191 harris41 5002:
5003: =item *
5004:
1.243 albertel 5005: EXT($varname,$symb,$udom,$uname) : evaluates and returns the value of
5006: a vairety of different possible values, $varname should be a request
5007: string, and the other parameters can be used to specify who and what
5008: one is asking about.
5009:
5010: Possible values for $varname are environment.lastname (or other item
5011: from the envirnment hash), user.name (or someother aspect about the
5012: user), resource.0.maxtries (or some other part and parameter of a
5013: resource)
1.204 albertel 5014:
5015: =item *
5016:
1.243 albertel 5017: directcondval($number) : get current value of a condition; reads from a state
5018: string
1.204 albertel 5019:
5020: =item *
5021:
1.243 albertel 5022: condval($condidx) : value of condition index based on state
1.204 albertel 5023:
5024: =item *
5025:
1.243 albertel 5026: metadata($uri,$what,$liburi,$prefix,$depthcount) : request a
5027: resource's metadata, $what should be either a specific key, or either
5028: 'keys' (to get a list of possible keys) or 'packages' to get a list of
5029: packages that this resource currently uses, the last 3 arguments are only used internally for recursive metadata.
5030:
5031: this function automatically caches all requests
1.191 harris41 5032:
5033: =item *
5034:
1.243 albertel 5035: metadata_query($query,$custom,$customshow) : make a metadata query against the
5036: network of library servers; returns file handle of where SQL and regex results
5037: will be stored for query
1.191 harris41 5038:
5039: =item *
5040:
1.243 albertel 5041: symbread($filename) : return symbolic list entry (filename argument optional);
5042: returns the data handle
1.191 harris41 5043:
5044: =item *
5045:
1.243 albertel 5046: symbverify($symb,$thisfn) : verifies that $symb actually exists and is
5047: a possible symb for the URL in $thisfn, returns a 1 on success, 0 on
5048: failure, user must be in a course, as it assumes the existance of the
5049: course initi hash, and uses $ENV('request.course.id'}
5050:
1.191 harris41 5051:
5052: =item *
5053:
1.243 albertel 5054: symbclean($symb) : removes versions numbers from a symb, returns the
5055: cleaned symb
1.191 harris41 5056:
5057: =item *
5058:
1.243 albertel 5059: is_on_map($uri) : checks if the $uri is somewhere on the current
5060: course map, user must be in a course for it to work.
1.191 harris41 5061:
5062: =item *
5063:
1.243 albertel 5064: numval($salt) : return random seed value (addend for rndseed)
1.191 harris41 5065:
5066: =item *
5067:
1.243 albertel 5068: rndseed($symb,$courseid,$udom,$uname) : create a random sum; returns
5069: a random seed, all arguments are optional, if they aren't sent it uses the
5070: environment to derive them. Note: if symb isn't sent and it can't get one
5071: from &symbread it will use the current time as its return value
1.191 harris41 5072:
5073: =item *
5074:
1.243 albertel 5075: ireceipt($funame,$fudom,$fucourseid,$fusymb) : return unique,
5076: unfakeable, receipt
1.191 harris41 5077:
5078: =item *
5079:
1.243 albertel 5080: receipt() : API to ireceipt working off of ENV values; given out to users
1.191 harris41 5081:
5082: =item *
5083:
1.243 albertel 5084: countacc($url) : count the number of accesses to a given URL
1.191 harris41 5085:
5086: =item *
5087:
1.243 albertel 5088: checkout($symb,$tuname,$tudom,$tcrsid) : creates a record of a user having looked at an item, most likely printed out or otherwise using a resource
1.191 harris41 5089:
5090: =item *
5091:
1.243 albertel 5092: checkin($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 $tcrsid)
1.191 harris41 5093:
5094: =item *
5095:
1.243 albertel 5096: expirespread($uname,$udom,$stype,$usymb) : set expire date for spreadsheet
1.191 harris41 5097:
5098: =item *
5099:
1.243 albertel 5100: devalidate($symb) : devalidate temporary spreadsheet calculations,
5101: forcing spreadsheet to reevaluate the resource scores next time.
5102:
5103: =back
5104:
5105: =head2 Storing/Retreiving Data
5106:
5107: =over 4
1.191 harris41 5108:
5109: =item *
5110:
1.243 albertel 5111: store($storehash,$symb,$namespace,$udom,$uname) : stores hash permanently
5112: for this url; hashref needs to be given and should be a \%hashname; the
5113: remaining args aren't required and if they aren't passed or are '' they will
5114: be derived from the ENV
1.191 harris41 5115:
5116: =item *
5117:
1.243 albertel 5118: cstore($storehash,$symb,$namespace,$udom,$uname) : same as store but
5119: uses critical subroutine
1.191 harris41 5120:
5121: =item *
5122:
1.243 albertel 5123: restore($symb,$namespace,$udom,$uname) : returns hash for this symb;
5124: all args are optional
1.191 harris41 5125:
5126: =item *
5127:
1.243 albertel 5128: tmpstore($storehash,$symb,$namespace,$udom,$uname) : storage that
5129: works very similar to store/cstore, but all data is stored in a
5130: temporary location and can be reset using tmpreset, $storehash should
5131: be a hash reference, returns nothing on success
1.191 harris41 5132:
5133: =item *
5134:
1.243 albertel 5135: tmprestore($symb,$namespace,$udom,$uname) : storage that works very
5136: similar to restore, but all data is stored in a temporary location and
5137: can be reset using tmpreset. Returns a hash of values on success,
5138: error string otherwise.
1.191 harris41 5139:
5140: =item *
5141:
1.243 albertel 5142: tmpreset($symb,$namespace,$udom,$uname) : temporary storage reset,
5143: deltes all keys for $symb form the temporary storage hash.
1.191 harris41 5144:
5145: =item *
5146:
1.243 albertel 5147: get($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5148: reference filled in from namesp ($udom and $uname are optional)
1.191 harris41 5149:
5150: =item *
5151:
1.243 albertel 5152: del($namespace,$storearr,$udom,$uname) : deletes keys out of array from
5153: namesp ($udom and $uname are optional)
1.191 harris41 5154:
5155: =item *
5156:
1.243 albertel 5157: dump($namespace,$udom,$uname,$regexp) :
5158: dumps the complete (or key matching regexp) namespace into a hash
5159: ($udom, $uname and $regexp are optional)
1.191 harris41 5160:
5161: =item *
5162:
1.243 albertel 5163: put($namespace,$storehash,$udom,$uname) : stores hash in namesp
5164: ($udom and $uname are optional)
1.191 harris41 5165:
5166: =item *
5167:
1.243 albertel 5168: cput($namespace,$storehash,$udom,$uname) : critical put
5169: ($udom and $uname are optional)
1.191 harris41 5170:
5171: =item *
5172:
1.243 albertel 5173: eget($namespace,$storearr,$udom,$uname) : returns hash with keys from array
5174: reference filled in from namesp (encrypts the return communication)
5175: ($udom and $uname are optional)
1.191 harris41 5176:
5177: =item *
5178:
1.243 albertel 5179: log($udom,$name,$home,$message) : write to permanent log for user; use
5180: critical subroutine
5181:
5182: =back
5183:
5184: =head2 Network Status Functions
5185:
5186: =over 4
1.191 harris41 5187:
5188: =item *
5189:
5190: dirlist($uri) : return directory list based on URI
5191:
5192: =item *
5193:
1.243 albertel 5194: spareserver() : find server with least workload from spare.tab
5195:
5196: =back
5197:
5198: =head2 Apache Request
5199:
5200: =over 4
1.191 harris41 5201:
5202: =item *
5203:
1.243 albertel 5204: ssi($url,%hash) : server side include, does a complete request cycle on url to
5205: localhost, posts hash
5206:
5207: =back
5208:
5209: =head2 Data to String to Data
5210:
5211: =over 4
1.191 harris41 5212:
5213: =item *
5214:
1.243 albertel 5215: hash2str(%hash) : convert a hash into a string complete with escaping and '='
5216: and '&' separators, supports elements that are arrayrefs and hashrefs
1.191 harris41 5217:
5218: =item *
5219:
1.243 albertel 5220: hashref2str($hashref) : convert a hashref into a string complete with
5221: escaping and '=' and '&' separators, supports elements that are
5222: arrayrefs and hashrefs
1.191 harris41 5223:
5224: =item *
5225:
1.243 albertel 5226: arrayref2str($arrayref) : convert an arrayref into a string complete
5227: with escaping and '&' separators, supports elements that are arrayrefs
5228: and hashrefs
1.191 harris41 5229:
5230: =item *
5231:
1.243 albertel 5232: str2hash($string) : convert string to hash using unescaping and
5233: splitting on '=' and '&', supports elements that are arrayrefs and
5234: hashrefs
1.191 harris41 5235:
5236: =item *
5237:
1.243 albertel 5238: str2array($string) : convert string to hash using unescaping and
5239: splitting on '&', supports elements that are arrayrefs and hashrefs
5240:
5241: =back
5242:
5243: =head2 Logging Routines
5244:
5245: =over 4
5246:
5247: These routines allow one to make log messages in the lonnet.log and
5248: lonnet.perm logfiles.
1.191 harris41 5249:
5250: =item *
5251:
1.243 albertel 5252: logtouch() : make sure the logfile, lonnet.log, exists
1.191 harris41 5253:
5254: =item *
5255:
1.243 albertel 5256: logthis() : append message to the normal lonnet.log file, it gets
5257: preiodically rolled over and deleted.
1.191 harris41 5258:
5259: =item *
5260:
1.243 albertel 5261: logperm() : append a permanent message to lonnet.perm.log, this log
5262: file never gets deleted by any automated portion of the system, only
5263: messages of critical importance should go in here.
5264:
5265: =back
5266:
5267: =head2 General File Helper Routines
5268:
5269: =over 4
1.191 harris41 5270:
5271: =item *
5272:
1.243 albertel 5273: getfile($file) : returns the entire contents of a file or -1; it
5274: properly subscribes to and replicates the file if neccessary.
1.191 harris41 5275:
5276: =item *
5277:
1.243 albertel 5278: filelocation($dir,$file) : returns file system location of a file
5279: based on URI; meant to be "fairly clean" absolute reference, $dir is a
5280: directory that relative $file lookups are to looked in ($dir of /a/dir
5281: and a file of ../bob will become /a/bob)
1.191 harris41 5282:
5283: =item *
5284:
5285: hreflocation($dir,$file) : returns file system location or a URL; same as
5286: filelocation except for hrefs
5287:
5288: =item *
5289:
5290: declutter() : declutters URLs (remove docroot, beginning slashes, 'res' etc)
5291:
1.243 albertel 5292: =back
5293:
5294: =head2 HTTP Helper Routines
5295:
5296: =over 4
5297:
1.191 harris41 5298: =item *
5299:
5300: escape() : unpack non-word characters into CGI-compatible hex codes
5301:
5302: =item *
5303:
5304: unescape() : pack CGI-compatible hex codes into actual non-word ASCII character
5305:
1.243 albertel 5306: =back
5307:
5308: =head1 PRIVATE SUBROUTINES
5309:
5310: =head2 Underlying communication routines (Shouldn't call)
5311:
5312: =over 4
5313:
5314: =item *
5315:
5316: subreply() : tries to pass a message to lonc, returns con_lost if incapable
5317:
5318: =item *
5319:
5320: reply() : uses subreply to send a message to remote machine, logs all failures
5321:
5322: =item *
5323:
5324: critical() : passes a critical message to another server; if cannot
5325: get through then place message in connection buffer directory and
5326: returns con_delayed, if incapable of saving message, returns
5327: con_failed
5328:
5329: =item *
5330:
5331: reconlonc() : tries to reconnect lonc client processes.
5332:
5333: =back
5334:
5335: =head2 Resource Access Logging
5336:
5337: =over 4
5338:
5339: =item *
5340:
5341: flushcourselogs() : flush (save) buffer logs and access logs
5342:
5343: =item *
5344:
5345: courselog($what) : save message for course in hash
5346:
5347: =item *
5348:
5349: courseacclog($what) : save message for course using &courselog(). Perform
5350: special processing for specific resource types (problems, exams, quizzes, etc).
5351:
1.191 harris41 5352: =item *
5353:
5354: goodbye() : flush course logs and log shutting down; it is called in srm.conf
5355: as a PerlChildExitHandler
1.243 albertel 5356:
5357: =back
5358:
5359: =head2 Other
5360:
5361: =over 4
5362:
5363: =item *
5364:
5365: symblist($mapname,%newhash) : update symbolic storage links
1.191 harris41 5366:
5367: =back
5368:
5369: =cut
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