1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.186 2001/12/07 16:43:39 www Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
29: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
30: # 11/8,11/16,11/18,11/22,11/23,12/22,
31: # 01/06,01/13,02/24,02/28,02/29,
32: # 03/01,03/02,03/06,03/07,03/13,
33: # 04/05,05/29,05/31,06/01,
34: # 06/05,06/26 Gerd Kortemeyer
35: # 06/26 Ben Tyszka
36: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
37: # 08/14 Ben Tyszka
38: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
39: # 10/04 Gerd Kortemeyer
40: # 10/04 Guy Albertelli
41: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
42: # 10/30,10/31,
43: # 11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25,11/27,
44: # 12/02,12/12,12/13,12/14,12/28,12/29 Gerd Kortemeyer
45: # 05/01/01 Guy Albertelli
46: # 05/01,06/01,09/01 Gerd Kortemeyer
47: # 09/01 Guy Albertelli
48: # 09/01,10/01,11/01 Gerd Kortemeyer
49: # YEAR=2001
50: # 02/27/01 Scott Harrison
51: # 3/2 Gerd Kortemeyer
52: # 3/15,3/19 Scott Harrison
53: # 3/19,3/20 Gerd Kortemeyer
54: # 3/22,3/27,4/2,4/16,4/17 Scott Harrison
55: # 5/26,5/28 Gerd Kortemeyer
56: # 5/30 H. K. Ng
57: # 6/1 Gerd Kortemeyer
58: # July Guy Albertelli
59: # 8/4,8/7,8/8,8/9,8/11,8/16,8/17,8/18,8/20,8/23,9/20,9/21,9/26,
60: # 10/2 Gerd Kortemeyer
61: # 10/5,10/10,11/13,11/15 Scott Harrison
62: # 11/17,11/20,11/22,11/29 Gerd Kortemeyer
63: # 12/5 Matthew Hall
64: # 12/5 Guy Albertelli
65: # 12/6 Gerd Kortemeyer
66: #
67: # $Id: lonnet.pm,v 1.186 2001/12/07 16:43:39 www Exp $
68: #
69: ###
70:
71: # Functions for use by content handlers:
72: #
73: # metadata_query(sql-query-string,custom-metadata-regex) :
74: # returns file handle of where sql and
75: # regex results will be stored for query
76: # plaintext(short) : plain text explanation of short term
77: # fileembstyle(ext) : embed style in page for file extension
78: # filedescription(ext) : descriptor text for file extension
79: # allowed(short,url) : returns codes for allowed actions
80: # F: full access
81: # U,I,K: authentication modes (cxx only)
82: # '': forbidden
83: # 1: user needs to choose course
84: # 2: browse allowed
85: # definerole(rolename,sys,dom,cou) : define a custom role rolename
86: # set privileges in format of lonTabs/roles.tab for
87: # system, domain and course level,
88: # assignrole(udom,uname,url,role,end,start) : give a role to a user for the
89: # level given by url. Optional start and end dates
90: # (leave empty string or zero for "no date")
91: # assigncustomrole (udom,uname,url,rdom,rnam,rolename,end,start) : give a
92: # custom role to a user for the level given by url.
93: # Specify name and domain of role author, and role name
94: # revokerole (udom,uname,url,role) : Revoke a role for url
95: # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role
96: # appenv(hash) : adds hash to session environment
97: # delenv(varname) : deletes all environment entries starting with varname
98: # store(hashref,symb,courseid,udom,uname)
99: # : stores hash permanently for this url
100: # hashref needs to be given, and should be a \%hashname
101: # the remaining args aren't required and if they aren't
102: # passed or are '' they will be derived from the ENV
103: # cstore(hashref,symb,courseid,udom,uname)
104: # : same as store but uses the critical interface to
105: # guarentee a store
106: # restore(symb,courseid,udom,uname)
107: # : returns hash for this symb, all args are optional
108: # if they aren't given they will be derived from the
109: # current enviroment
110: #
111: #
112: # for the next 6 functions udom and uname are optional
113: # if supplied they use udom as the domain and uname
114: # as the username for the function (supply a courseid
115: # for the uname if you want a course database)
116: # if not supplied it uses %ENV and looks at
117: # user. attribute for the values
118: #
119: # eget(namesp,arrayref,udom,uname)
120: # : returns hash with keys from array reference filled
121: # in from namesp (encrypts the return communication)
122: # get(namesp,arrayref,udom,uname)
123: # : returns hash with keys from array reference filled
124: # in from namesp
125: # dump(namesp,udom,uname) : dumps the complete namespace into a hash
126: # del(namesp,array,udom,uname) : deletes keys out of array from namesp
127: # put(namesp,hash,udom,uname) : stores hash in namesp
128: # cput(namesp,hash,udom,uname) : critical put
129: #
130: #
131: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
132: # hash
133: # coursedescription(id) : returns and caches course description for id
134: # repcopy(filename) : replicate file
135: # dirlist(url) : gets a directory listing
136: # directcondval(index) : reading condition value of single condition from
137: # state string
138: # condval(index) : value of condition index based on state
139: # EXT(name) : value of a variable
140: # symblist(map,hash) : Updates symbolic storage links
141: # symbread([filename]) : returns the data handle (filename optional)
142: # rndseed([symb,courseid,domain,uname])
143: # : returns a random seed, all arguments are optional,
144: # if they aren't sent it use the environment to derive
145: # them
146: # Note: if symb isn't sent and it can't get one from
147: # &symbread it will use the current time as it's return
148: # receipt() : returns a receipt to be given out to users
149: # getfile(filename) : returns the contents of filename, or a -1 if it can't
150: # be found, replicates and subscribes to the file
151: # filelocation(dir,file) : returns a fairly clean absolute reference to file
152: # from the directory dir
153: # hreflocation(dir,file) : same as filelocation, but for hrefs
154: # log(domain,user,home,msg) : write to permanent log for user
155: # usection(domain,user,courseid) : output of section name/number or '' for
156: # "not in course" and '-1' for "no section"
157: # userenvironment(domain,user,what) : puts out any environment parameter
158: # for a user
159: # idput(domain,hash) : writes IDs for users from hash (name=>id,name=>id)
160: # idget(domain,array): returns hash with usernames (id=>name,id=>name) for
161: # an array of IDs
162: # idrget(domain,array): returns hash with IDs for usernames (name=>id,...) for
163: # an array of names
164: # metadata(file,entry): returns the metadata entry for a file. entry='keys'
165: # returns a comma separated list of keys
166: #
167:
168: package Apache::lonnet;
169:
170: use strict;
171: use Apache::File;
172: use LWP::UserAgent();
173: use HTTP::Headers;
174: use vars
175: qw(%perlvar %hostname %homecache %hostip %spareid %hostdom %libserv %pr %prp %fe %fd %metacache %packagetab %courselogs %accesshash $processmarker $dumpcount);
176: use IO::Socket;
177: use GDBM_File;
178: use Apache::Constants qw(:common :http);
179: use HTML::TokeParser;
180: use Fcntl qw(:flock);
181:
182: # --------------------------------------------------------------------- Logging
183:
184: sub logtouch {
185: my $execdir=$perlvar{'lonDaemons'};
186: unless (-e "$execdir/logs/lonnet.log") {
187: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
188: close $fh;
189: }
190: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
191: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
192: }
193:
194: sub logthis {
195: my $message=shift;
196: my $execdir=$perlvar{'lonDaemons'};
197: my $now=time;
198: my $local=localtime($now);
199: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
200: print $fh "$local ($$): $message\n";
201: return 1;
202: }
203:
204: sub logperm {
205: my $message=shift;
206: my $execdir=$perlvar{'lonDaemons'};
207: my $now=time;
208: my $local=localtime($now);
209: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
210: print $fh "$now:$message:$local\n";
211: return 1;
212: }
213:
214: # -------------------------------------------------- Non-critical communication
215: sub subreply {
216: my ($cmd,$server)=@_;
217: my $peerfile="$perlvar{'lonSockDir'}/$server";
218: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
219: Type => SOCK_STREAM,
220: Timeout => 10)
221: or return "con_lost";
222: print $client "$cmd\n";
223: my $answer=<$client>;
224: if (!$answer) { $answer="con_lost"; }
225: chomp($answer);
226: return $answer;
227: }
228:
229: sub reply {
230: my ($cmd,$server)=@_;
231: my $answer=subreply($cmd,$server);
232: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
233: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
234: &logthis("<font color=blue>WARNING:".
235: " $cmd to $server returned $answer</font>");
236: }
237: return $answer;
238: }
239:
240: # ----------------------------------------------------------- Send USR1 to lonc
241:
242: sub reconlonc {
243: my $peerfile=shift;
244: &logthis("Trying to reconnect for $peerfile");
245: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
246: if (my $fh=Apache::File->new("$loncfile")) {
247: my $loncpid=<$fh>;
248: chomp($loncpid);
249: if (kill 0 => $loncpid) {
250: &logthis("lonc at pid $loncpid responding, sending USR1");
251: kill USR1 => $loncpid;
252: sleep 1;
253: if (-e "$peerfile") { return; }
254: &logthis("$peerfile still not there, give it another try");
255: sleep 5;
256: if (-e "$peerfile") { return; }
257: &logthis(
258: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
259: } else {
260: &logthis(
261: "<font color=blue>WARNING:".
262: " lonc at pid $loncpid not responding, giving up</font>");
263: }
264: } else {
265: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
266: }
267: }
268:
269: # ------------------------------------------------------ Critical communication
270:
271: sub critical {
272: my ($cmd,$server)=@_;
273: unless ($hostname{$server}) {
274: &logthis("<font color=blue>WARNING:".
275: " Critical message to unknown server ($server)</font>");
276: return 'no_such_host';
277: }
278: my $answer=reply($cmd,$server);
279: if ($answer eq 'con_lost') {
280: my $pingreply=reply('ping',$server);
281: &reconlonc("$perlvar{'lonSockDir'}/$server");
282: my $pongreply=reply('pong',$server);
283: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
284: $answer=reply($cmd,$server);
285: if ($answer eq 'con_lost') {
286: my $now=time;
287: my $middlename=$cmd;
288: $middlename=substr($middlename,0,16);
289: $middlename=~s/\W//g;
290: my $dfilename=
291: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
292: {
293: my $dfh;
294: if ($dfh=Apache::File->new(">$dfilename")) {
295: print $dfh "$cmd\n";
296: }
297: }
298: sleep 2;
299: my $wcmd='';
300: {
301: my $dfh;
302: if ($dfh=Apache::File->new("$dfilename")) {
303: $wcmd=<$dfh>;
304: }
305: }
306: chomp($wcmd);
307: if ($wcmd eq $cmd) {
308: &logthis("<font color=blue>WARNING: ".
309: "Connection buffer $dfilename: $cmd</font>");
310: &logperm("D:$server:$cmd");
311: return 'con_delayed';
312: } else {
313: &logthis("<font color=red>CRITICAL:"
314: ." Critical connection failed: $server $cmd</font>");
315: &logperm("F:$server:$cmd");
316: return 'con_failed';
317: }
318: }
319: }
320: return $answer;
321: }
322:
323: # ---------------------------------------------------------- Append Environment
324:
325: sub appenv {
326: my %newenv=@_;
327: map {
328: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
329: &logthis("<font color=blue>WARNING: ".
330: "Attempt to modify environment ".$_." to ".$newenv{$_}
331: .'</font>');
332: delete($newenv{$_});
333: } else {
334: $ENV{$_}=$newenv{$_};
335: }
336: } keys %newenv;
337:
338: my $lockfh;
339: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
340: return 'error: '.$!;
341: }
342: unless (flock($lockfh,LOCK_EX)) {
343: &logthis("<font color=blue>WARNING: ".
344: 'Could not obtain exclusive lock in appenv: '.$!);
345: $lockfh->close();
346: return 'error: '.$!;
347: }
348:
349: my @oldenv;
350: {
351: my $fh;
352: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
353: return 'error: '.$!;
354: }
355: @oldenv=<$fh>;
356: $fh->close();
357: }
358: for (my $i=0; $i<=$#oldenv; $i++) {
359: chomp($oldenv[$i]);
360: if ($oldenv[$i] ne '') {
361: my ($name,$value)=split(/=/,$oldenv[$i]);
362: unless (defined($newenv{$name})) {
363: $newenv{$name}=$value;
364: }
365: }
366: }
367: {
368: my $fh;
369: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
370: return 'error';
371: }
372: my $newname;
373: foreach $newname (keys %newenv) {
374: print $fh "$newname=$newenv{$newname}\n";
375: }
376: $fh->close();
377: }
378:
379: $lockfh->close();
380: return 'ok';
381: }
382: # ----------------------------------------------------- Delete from Environment
383:
384: sub delenv {
385: my $delthis=shift;
386: my %newenv=();
387: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
388: &logthis("<font color=blue>WARNING: ".
389: "Attempt to delete from environment ".$delthis);
390: return 'error';
391: }
392: my @oldenv;
393: {
394: my $fh;
395: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
396: return 'error';
397: }
398: unless (flock($fh,LOCK_SH)) {
399: &logthis("<font color=blue>WARNING: ".
400: 'Could not obtain shared lock in delenv: '.$!);
401: $fh->close();
402: return 'error: '.$!;
403: }
404: @oldenv=<$fh>;
405: $fh->close();
406: }
407: {
408: my $fh;
409: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
410: return 'error';
411: }
412: unless (flock($fh,LOCK_EX)) {
413: &logthis("<font color=blue>WARNING: ".
414: 'Could not obtain exclusive lock in delenv: '.$!);
415: $fh->close();
416: return 'error: '.$!;
417: }
418: map {
419: unless ($_=~/^$delthis/) { print $fh $_; }
420: } @oldenv;
421: $fh->close();
422: }
423: return 'ok';
424: }
425:
426: # ------------------------------ Find server with least workload from spare.tab
427:
428: sub spareserver {
429: my $tryserver;
430: my $spareserver='';
431: my $lowestserver=100;
432: foreach $tryserver (keys %spareid) {
433: my $answer=reply('load',$tryserver);
434: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
435: $spareserver="http://$hostname{$tryserver}";
436: $lowestserver=$answer;
437: }
438: }
439: return $spareserver;
440: }
441:
442: # ----------------------- Try to determine user's current authentication scheme
443:
444: sub queryauthenticate {
445: my ($uname,$udom)=@_;
446: if (($perlvar{'lonRole'} eq 'library') &&
447: ($udom eq $perlvar{'lonDefDomain'})) {
448: my $answer=reply("encrypt:currentauth:$udom:$uname",
449: $perlvar{'lonHostID'});
450: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
451: if (length($answer)) {
452: return $answer;
453: }
454: else {
455: &logthis("User $uname at $udom lacks an authentication mechanism");
456: return 'no_host';
457: }
458: }
459: }
460:
461: my $tryserver;
462: foreach $tryserver (keys %libserv) {
463: if ($hostdom{$tryserver} eq $udom) {
464: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
465: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
466: if (length($answer)) {
467: return $answer;
468: }
469: else {
470: &logthis("User $uname at $udom lacks an authentication mechanism");
471: return 'no_host';
472: }
473: }
474: }
475: }
476: &logthis("User $uname at $udom lacks an authentication mechanism");
477: return 'no_host';
478: }
479:
480: # --------- Try to authenticate user from domain's lib servers (first this one)
481:
482: sub authenticate {
483: my ($uname,$upass,$udom)=@_;
484: $upass=escape($upass);
485: if (($perlvar{'lonRole'} eq 'library') &&
486: ($udom eq $perlvar{'lonDefDomain'})) {
487: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
488: if ($answer =~ /authorized/) {
489: if ($answer eq 'authorized') {
490: &logthis("User $uname at $udom authorized by local server");
491: return $perlvar{'lonHostID'};
492: }
493: if ($answer eq 'non_authorized') {
494: &logthis("User $uname at $udom rejected by local server");
495: return 'no_host';
496: }
497: }
498: }
499:
500: my $tryserver;
501: foreach $tryserver (keys %libserv) {
502: if ($hostdom{$tryserver} eq $udom) {
503: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
504: if ($answer =~ /authorized/) {
505: if ($answer eq 'authorized') {
506: &logthis("User $uname at $udom authorized by $tryserver");
507: return $tryserver;
508: }
509: if ($answer eq 'non_authorized') {
510: &logthis("User $uname at $udom rejected by $tryserver");
511: return 'no_host';
512: }
513: }
514: }
515: }
516: &logthis("User $uname at $udom could not be authenticated");
517: return 'no_host';
518: }
519:
520: # ---------------------- Find the homebase for a user from domain's lib servers
521:
522: sub homeserver {
523: my ($uname,$udom)=@_;
524:
525: my $index="$uname:$udom";
526: if ($homecache{$index}) { return "$homecache{$index}"; }
527:
528: my $tryserver;
529: foreach $tryserver (keys %libserv) {
530: if ($hostdom{$tryserver} eq $udom) {
531: my $answer=reply("home:$udom:$uname",$tryserver);
532: if ($answer eq 'found') {
533: $homecache{$index}=$tryserver;
534: return $tryserver;
535: }
536: }
537: }
538: return 'no_host';
539: }
540:
541: # ------------------------------------- Find the usernames behind a list of IDs
542:
543: sub idget {
544: my ($udom,@ids)=@_;
545: my %returnhash=();
546:
547: my $tryserver;
548: foreach $tryserver (keys %libserv) {
549: if ($hostdom{$tryserver} eq $udom) {
550: my $idlist=join('&',@ids);
551: $idlist=~tr/A-Z/a-z/;
552: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
553: my @answer=();
554: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
555: @answer=split(/\&/,$reply);
556: } ;
557: my $i;
558: for ($i=0;$i<=$#ids;$i++) {
559: if ($answer[$i]) {
560: $returnhash{$ids[$i]}=$answer[$i];
561: }
562: }
563: }
564: }
565: return %returnhash;
566: }
567:
568: # ------------------------------------- Find the IDs behind a list of usernames
569:
570: sub idrget {
571: my ($udom,@unames)=@_;
572: my %returnhash=();
573: map {
574: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
575: } @unames;
576: return %returnhash;
577: }
578:
579: # ------------------------------- Store away a list of names and associated IDs
580:
581: sub idput {
582: my ($udom,%ids)=@_;
583: my %servers=();
584: map {
585: my $uhom=&homeserver($_,$udom);
586: if ($uhom ne 'no_host') {
587: my $id=&escape($ids{$_});
588: $id=~tr/A-Z/a-z/;
589: my $unam=&escape($_);
590: if ($servers{$uhom}) {
591: $servers{$uhom}.='&'.$id.'='.$unam;
592: } else {
593: $servers{$uhom}=$id.'='.$unam;
594: }
595: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
596: }
597: } keys %ids;
598: map {
599: &critical('idput:'.$udom.':'.$servers{$_},$_);
600: } keys %servers;
601: }
602:
603: # ------------------------------------- Find the section of student in a course
604:
605: sub usection {
606: my ($udom,$unam,$courseid)=@_;
607: $courseid=~s/\_/\//g;
608: $courseid=~s/^(\w)/\/$1/;
609: map {
610: my ($key,$value)=split(/\=/,$_);
611: $key=&unescape($key);
612: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
613: my $section=$1;
614: if ($key eq $courseid.'_st') { $section=''; }
615: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
616: my $now=time;
617: my $notactive=0;
618: if ($start) {
619: if ($now<$start) { $notactive=1; }
620: }
621: if ($end) {
622: if ($now>$end) { $notactive=1; }
623: }
624: unless ($notactive) { return $section; }
625: }
626: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
627: &homeserver($unam,$udom)));
628: return '-1';
629: }
630:
631: # ------------------------------------- Read an entry from a user's environment
632:
633: sub userenvironment {
634: my ($udom,$unam,@what)=@_;
635: my %returnhash=();
636: my @answer=split(/\&/,
637: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
638: &homeserver($unam,$udom)));
639: my $i;
640: for ($i=0;$i<=$#what;$i++) {
641: $returnhash{$what[$i]}=&unescape($answer[$i]);
642: }
643: return %returnhash;
644: }
645:
646: # ----------------------------- Subscribe to a resource, return URL if possible
647:
648: sub subscribe {
649: my $fname=shift;
650: my $author=$fname;
651: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
652: my ($udom,$uname)=split(/\//,$author);
653: my $home=homeserver($uname,$udom);
654: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
655: return 'not_found';
656: }
657: my $answer=reply("sub:$fname",$home);
658: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
659: $answer.=' by '.$home;
660: }
661: return $answer;
662: }
663:
664: # -------------------------------------------------------------- Replicate file
665:
666: sub repcopy {
667: my $filename=shift;
668: $filename=~s/\/+/\//g;
669: my $transname="$filename.in.transfer";
670: if ((-e $filename) || (-e $transname)) { return OK; }
671: my $remoteurl=subscribe($filename);
672: if ($remoteurl =~ /^con_lost by/) {
673: &logthis("Subscribe returned $remoteurl: $filename");
674: return HTTP_SERVICE_UNAVAILABLE;
675: } elsif ($remoteurl eq 'not_found') {
676: &logthis("Subscribe returned not_found: $filename");
677: return HTTP_NOT_FOUND;
678: } elsif ($remoteurl =~ /^rejected by/) {
679: &logthis("Subscribe returned $remoteurl: $filename");
680: return FORBIDDEN;
681: } elsif ($remoteurl eq 'directory') {
682: return OK;
683: } else {
684: my @parts=split(/\//,$filename);
685: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
686: if ($path ne "$perlvar{'lonDocRoot'}/res") {
687: &logthis("Malconfiguration for replication: $filename");
688: return HTTP_BAD_REQUEST;
689: }
690: my $count;
691: for ($count=5;$count<$#parts;$count++) {
692: $path.="/$parts[$count]";
693: if ((-e $path)!=1) {
694: mkdir($path,0777);
695: }
696: }
697: my $ua=new LWP::UserAgent;
698: my $request=new HTTP::Request('GET',"$remoteurl");
699: my $response=$ua->request($request,$transname);
700: if ($response->is_error()) {
701: unlink($transname);
702: my $message=$response->status_line;
703: &logthis("<font color=blue>WARNING:"
704: ." LWP get: $message: $filename</font>");
705: return HTTP_SERVICE_UNAVAILABLE;
706: } else {
707: if ($remoteurl!~/\.meta$/) {
708: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
709: my $mresponse=$ua->request($mrequest,$filename.'.meta');
710: if ($mresponse->is_error()) {
711: unlink($filename.'.meta');
712: &logthis(
713: "<font color=yellow>INFO: No metadata: $filename</font>");
714: }
715: }
716: rename($transname,$filename);
717: return OK;
718: }
719: }
720: }
721:
722: # --------------------------------------------------------- Server Side Include
723:
724: sub ssi {
725:
726: my ($fn,%form)=@_;
727:
728: my $ua=new LWP::UserAgent;
729:
730: my $request;
731:
732: if (%form) {
733: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
734: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
735: } else {
736: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
737: }
738:
739: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
740: my $response=$ua->request($request);
741:
742: return $response->content;
743: }
744:
745: # ------------------------------------------------------------------------- Log
746:
747: sub log {
748: my ($dom,$nam,$hom,$what)=@_;
749: return critical("log:$dom:$nam:$what",$hom);
750: }
751:
752: # ------------------------------------------------------------------ Course Log
753:
754: sub flushcourselogs {
755: &logthis('Flushing course log buffers');
756: map {
757: my $crsid=$_;
758: if (&reply('log:'.$ENV{'course.'.$crsid.'.domain'}.':'.
759: $ENV{'course.'.$crsid.'.num'}.':'.
760: &escape($courselogs{$crsid}),
761: $ENV{'course.'.$crsid.'.home'}) eq 'ok') {
762: delete $courselogs{$crsid};
763: } else {
764: &logthis('Failed to flush log buffer for '.$crsid);
765: if (length($courselogs{$crsid})>40000) {
766: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
767: " exceeded maximum size, deleting.</font>");
768: delete $courselogs{$crsid};
769: }
770: }
771: } keys %courselogs;
772: &logthis('Flushing access logs');
773: map {
774: my $entry=$_;
775: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
776: my %temphash=($entry => $accesshash{$entry});
777: if (&Apache::lonnet::put('resevaldata',\%temphash,$1,$2) eq 'ok') {
778: delete $accesshash{$entry};
779: }
780: } keys %accesshash;
781: $dumpcount++;
782: }
783:
784: sub courselog {
785: my $what=shift;
786: $what=time.':'.$what;
787: unless ($ENV{'request.course.id'}) { return ''; }
788: if (defined $courselogs{$ENV{'request.course.id'}}) {
789: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
790: } else {
791: $courselogs{$ENV{'request.course.id'}}.=$what;
792: }
793: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
794: &flushcourselogs();
795: }
796: }
797:
798: sub courseacclog {
799: my $fnsymb=shift;
800: unless ($ENV{'request.course.id'}) { return ''; }
801: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
802: if ($what=~/(problem|exam|quiz|assess|survey|form)$/) {
803: map {
804: if ($_=~/^form\.(.*)/) {
805: $what.=':'.$1.'='.$ENV{$_};
806: }
807: } keys %ENV;
808: }
809: &courselog($what);
810: }
811:
812: sub countacc {
813: my $url=&declutter(shift);
814: unless ($ENV{'request.course.id'}) { return ''; }
815: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
816: my $key=$processmarker.'_'.$dumpcount.'___'.$url.'___count';
817: if (defined($accesshash{$key})) {
818: $accesshash{$key}++;
819: } else {
820: $accesshash{$key}=1;
821: }
822: }
823:
824: # ----------------------------------------------------------- Check out an item
825:
826: sub checkout {
827: my ($symb,$tuname,$tudom,$tcrsid)=@_;
828: my $now=time;
829: my $lonhost=$perlvar{'lonHostID'};
830: my $infostr=&escape(
831: $tuname.'&'.
832: $tudom.'&'.
833: $tcrsid.'&'.
834: $symb.'&'.
835: $now.'&'.$ENV{'REMOTE_ADDR'});
836: my $token=&reply('tmpput:'.$infostr,$lonhost);
837: if ($token=~/^error\:/) {
838: &logthis("<font color=blue>WARNING: ".
839: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
840: "</font>");
841: return '';
842: }
843:
844: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
845: $token=~tr/a-z/A-Z/;
846:
847: my %infohash=('resource.0.outtoken' => $token,
848: 'resource.0.checkouttime' => $now,
849: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
850:
851: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
852: return '';
853: } else {
854: &logthis("<font color=blue>WARNING: ".
855: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
856: "</font>");
857: }
858:
859: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
860: &escape('Checkout '.$infostr.' - '.
861: $token)) ne 'ok') {
862: return '';
863: } else {
864: &logthis("<font color=blue>WARNING: ".
865: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
866: "</font>");
867: }
868: return $token;
869: }
870:
871: # ------------------------------------------------------------ Check in an item
872:
873: sub checkin {
874: my $token=shift;
875: my $now=time;
876: my ($ta,$tb,$lonhost)=split(/\*/,$token);
877: $lonhost=~tr/A-Z/a-z/;
878: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
879: $dtoken=~s/\W/\_/g;
880: my ($tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
881: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
882:
883: unless (($tuname) && ($tudom)) {
884: &logthis('Check in '.$token.' ('.$dtoken.') failed');
885: return '';
886: }
887:
888: unless (&allowed('mgr',$tcrsid)) {
889: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
890: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
891: return '';
892: }
893:
894: my %infohash=('resource.0.intoken' => $token,
895: 'resource.0.checkintime' => $now,
896: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
897:
898: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
899: return '';
900: }
901:
902: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
903: &escape('Checkin - '.$token)) ne 'ok') {
904: return '';
905: }
906:
907: return ($symb,$tuname,$tudom,$tcrsid);
908: }
909:
910: # --------------------------------------------- Set Expire Date for Spreadsheet
911:
912: sub expirespread {
913: my ($uname,$udom,$stype,$usymb)=@_;
914: my $cid=$ENV{'request.course.id'};
915: if ($cid) {
916: my $now=time;
917: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
918: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
919: $ENV{'course.'.$cid.'.num'}.
920: ':nohist_expirationdates:'.
921: &escape($key).'='.$now,
922: $ENV{'course.'.$cid.'.home'})
923: }
924: return 'ok';
925: }
926:
927: # ----------------------------------------------------- Devalidate Spreadsheets
928:
929: sub devalidate {
930: my $symb=shift;
931: my $cid=$ENV{'request.course.id'};
932: if ($cid) {
933: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
934: my $status=
935: &del('nohist_calculatedsheet',
936: [$key.'studentcalc'],
937: $ENV{'course.'.$cid.'.domain'},
938: $ENV{'course.'.$cid.'.num'})
939: .' '.
940: &del('nohist_calculatedsheets_'.$cid,
941: [$key.'assesscalc:'.$symb]);
942: unless ($status eq 'ok ok') {
943: &logthis('Could not devalidate spreadsheet '.
944: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
945: $symb.': '.$status);
946: }
947: }
948: }
949:
950: sub hash2str {
951: my (%hash)=@_;
952: my $result='';
953: map { $result.=escape($_).'='.escape($hash{$_}).'&'; } keys %hash;
954: $result=~s/\&$//;
955: return $result;
956: }
957:
958: sub str2hash {
959: my ($string) = @_;
960: my %returnhash;
961: map {
962: my ($name,$value)=split(/\=/,$_);
963: $returnhash{&unescape($name)}=&unescape($value);
964: } split(/\&/,$string);
965: return %returnhash;
966: }
967:
968: # -------------------------------------------------------------------Temp Store
969:
970: sub tmpreset {
971: my ($symb,$namespace,$domain,$stuname) = @_;
972: if (!$symb) {
973: $symb=&symbread();
974: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
975: }
976: $symb=escape($symb);
977:
978: if (!$namespace) { $namespace=$ENV{'request.state'}; }
979: $namespace=~s/\//\_/g;
980: $namespace=~s/\W//g;
981:
982: #FIXME needs to do something for /pub resources
983: if (!$domain) { $domain=$ENV{'user.domain'}; }
984: if (!$stuname) { $stuname=$ENV{'user.name'}; }
985: my $path=$perlvar{'lonDaemons'}.'/tmp';
986: my %hash;
987: if (tie(%hash,'GDBM_File',
988: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
989: &GDBM_WRCREAT,0640)) {
990: foreach my $key (keys %hash) {
991: if ($key=~ /:$symb/) {
992: delete($hash{$key});
993: }
994: }
995: }
996: }
997:
998: sub tmpstore {
999: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1000:
1001: if (!$symb) {
1002: $symb=&symbread();
1003: if (!$symb) { $symb= $ENV{'request.url'}; }
1004: }
1005: $symb=escape($symb);
1006:
1007: if (!$namespace) {
1008: # I don't think we would ever want to store this for a course.
1009: # it seems this will only be used if we don't have a course.
1010: #$namespace=$ENV{'request.course.id'};
1011: #if (!$namespace) {
1012: $namespace=$ENV{'request.state'};
1013: #}
1014: }
1015: $namespace=~s/\//\_/g;
1016: $namespace=~s/\W//g;
1017: #FIXME needs to do something for /pub resources
1018: if (!$domain) { $domain=$ENV{'user.domain'}; }
1019: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1020: my $now=time;
1021: my %hash;
1022: my $path=$perlvar{'lonDaemons'}.'/tmp';
1023: if (tie(%hash,'GDBM_File',
1024: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1025: &GDBM_WRCREAT,0640)) {
1026: $hash{"version:$symb"}++;
1027: my $version=$hash{"version:$symb"};
1028: my $allkeys='';
1029: foreach my $key (keys(%$storehash)) {
1030: $allkeys.=$key.':';
1031: $hash{"$version:$symb:$key"}=$$storehash{$key};
1032: }
1033: $hash{"$version:$symb:timestamp"}=$now;
1034: $allkeys.='timestamp';
1035: $hash{"$version:keys:$symb"}=$allkeys;
1036: if (untie(%hash)) {
1037: return 'ok';
1038: } else {
1039: return "error:$!";
1040: }
1041: } else {
1042: return "error:$!";
1043: }
1044: }
1045:
1046: # -----------------------------------------------------------------Temp Restore
1047:
1048: sub tmprestore {
1049: my ($symb,$namespace,$domain,$stuname) = @_;
1050:
1051: if (!$symb) {
1052: $symb=&symbread();
1053: if (!$symb) { $symb= $ENV{'request.url'}; }
1054: }
1055: $symb=escape($symb);
1056:
1057: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1058: #FIXME needs to do something for /pub resources
1059: if (!$domain) { $domain=$ENV{'user.domain'}; }
1060: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1061:
1062: my %returnhash;
1063: $namespace=~s/\//\_/g;
1064: $namespace=~s/\W//g;
1065: my %hash;
1066: my $path=$perlvar{'lonDaemons'}.'/tmp';
1067: if (tie(%hash,'GDBM_File',
1068: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1069: &GDBM_READER,0640)) {
1070: my $version=$hash{"version:$symb"};
1071: $returnhash{'version'}=$version;
1072: my $scope;
1073: for ($scope=1;$scope<=$version;$scope++) {
1074: my $vkeys=$hash{"$scope:keys:$symb"};
1075: my @keys=split(/:/,$vkeys);
1076: my $key;
1077: $returnhash{"$scope:keys"}=$vkeys;
1078: foreach $key (@keys) {
1079: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1080: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1081: }
1082: }
1083: if (!(untie(%hash))) {
1084: return "error:$!";
1085: }
1086: } else {
1087: return "error:$!";
1088: }
1089: return %returnhash;
1090: }
1091:
1092: # ----------------------------------------------------------------------- Store
1093:
1094: sub store {
1095: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1096: my $home='';
1097:
1098: if ($stuname) { $home=&homeserver($stuname,$domain); }
1099:
1100: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1101:
1102: &devalidate($symb);
1103:
1104: $symb=escape($symb);
1105: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1106: if (!$domain) { $domain=$ENV{'user.domain'}; }
1107: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1108: if (!$home) { $home=$ENV{'user.home'}; }
1109: my $namevalue='';
1110: map {
1111: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1112: } keys %$storehash;
1113: $namevalue=~s/\&$//;
1114: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1115: }
1116:
1117: # -------------------------------------------------------------- Critical Store
1118:
1119: sub cstore {
1120: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1121: my $home='';
1122:
1123: if ($stuname) { $home=&homeserver($stuname,$domain); }
1124:
1125: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1126:
1127: &devalidate($symb);
1128:
1129: $symb=escape($symb);
1130: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1131: if (!$domain) { $domain=$ENV{'user.domain'}; }
1132: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1133: if (!$home) { $home=$ENV{'user.home'}; }
1134:
1135: my $namevalue='';
1136: map {
1137: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1138: } keys %$storehash;
1139: $namevalue=~s/\&$//;
1140: return critical("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1141: }
1142:
1143: # --------------------------------------------------------------------- Restore
1144:
1145: sub restore {
1146: my ($symb,$namespace,$domain,$stuname) = @_;
1147: my $home='';
1148:
1149: if ($stuname) { $home=&homeserver($stuname,$domain); }
1150:
1151: if (!$symb) {
1152: unless ($symb=escape(&symbread())) { return ''; }
1153: } else {
1154: $symb=&escape($symb);
1155: }
1156: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1157: if (!$domain) { $domain=$ENV{'user.domain'}; }
1158: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1159: if (!$home) { $home=$ENV{'user.home'}; }
1160: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1161:
1162: my %returnhash=();
1163: map {
1164: my ($name,$value)=split(/\=/,$_);
1165: $returnhash{&unescape($name)}=&unescape($value);
1166: } split(/\&/,$answer);
1167: my $version;
1168: for ($version=1;$version<=$returnhash{'version'};$version++) {
1169: map {
1170: $returnhash{$_}=$returnhash{$version.':'.$_};
1171: } split(/\:/,$returnhash{$version.':keys'});
1172: }
1173: return %returnhash;
1174: }
1175:
1176: # ---------------------------------------------------------- Course Description
1177:
1178: sub coursedescription {
1179: my $courseid=shift;
1180: $courseid=~s/^\///;
1181: $courseid=~s/\_/\//g;
1182: my ($cdomain,$cnum)=split(/\//,$courseid);
1183: my $chome=&homeserver($cnum,$cdomain);
1184: if ($chome ne 'no_host') {
1185: my %returnhash=&dump('environment',$cdomain,$cnum);
1186: if (!exists($returnhash{'con_lost'})) {
1187: my $normalid=$cdomain.'_'.$cnum;
1188: my %envhash=();
1189: $returnhash{'home'}= $chome;
1190: $returnhash{'domain'} = $cdomain;
1191: $returnhash{'num'} = $cnum;
1192: while (my ($name,$value) = each %returnhash) {
1193: $envhash{'course.'.$normalid.'.'.$name}=$value;
1194: }
1195: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1196: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1197: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1198: $envhash{'course.'.$normalid.'.last_cache'}=time;
1199: $envhash{'course.'.$normalid.'.home'}=$chome;
1200: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1201: $envhash{'course.'.$normalid.'.num'}=$cnum;
1202: &appenv(%envhash);
1203: return %returnhash;
1204: }
1205: }
1206: return ();
1207: }
1208:
1209: # -------------------------------------------------------- Get user privileges
1210:
1211: sub rolesinit {
1212: my ($domain,$username,$authhost)=@_;
1213: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1214: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1215: my %allroles=();
1216: my %thesepriv=();
1217: my $now=time;
1218: my $userroles="user.login.time=$now\n";
1219: my $thesestr;
1220:
1221: if ($rolesdump ne '') {
1222: map {
1223: if ($_!~/^rolesdef\&/) {
1224: my ($area,$role)=split(/=/,$_);
1225: $area=~s/\_\w\w$//;
1226: my ($trole,$tend,$tstart)=split(/_/,$role);
1227: $userroles.='user.role.'.$trole.'.'.$area.'='.
1228: $tstart.'.'.$tend."\n";
1229: if ($tend!=0) {
1230: if ($tend<$now) {
1231: $trole='';
1232: }
1233: }
1234: if ($tstart!=0) {
1235: if ($tstart>$now) {
1236: $trole='';
1237: }
1238: }
1239: if (($area ne '') && ($trole ne '')) {
1240: my $spec=$trole.'.'.$area;
1241: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1242: if ($trole =~ /^cr\//) {
1243: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1244: my $homsvr=homeserver($rauthor,$rdomain);
1245: if ($hostname{$homsvr} ne '') {
1246: my $roledef=
1247: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1248: $homsvr);
1249: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1250: my ($syspriv,$dompriv,$coursepriv)=
1251: split(/\_/,unescape($roledef));
1252: $allroles{'cm./'}.=':'.$syspriv;
1253: $allroles{$spec.'./'}.=':'.$syspriv;
1254: if ($tdomain ne '') {
1255: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1256: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1257: if ($trest ne '') {
1258: $allroles{'cm.'.$area}.=':'.$coursepriv;
1259: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1260: }
1261: }
1262: }
1263: }
1264: } else {
1265: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1266: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1267: if ($tdomain ne '') {
1268: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1269: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1270: if ($trest ne '') {
1271: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1272: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1273: }
1274: }
1275: }
1276: }
1277: }
1278: } split(/&/,$rolesdump);
1279: my $adv=0;
1280: my $author=0;
1281: map {
1282: %thesepriv=();
1283: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1284: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1285: map {
1286: if ($_ ne '') {
1287: my ($privilege,$restrictions)=split(/&/,$_);
1288: if ($restrictions eq '') {
1289: $thesepriv{$privilege}='F';
1290: } else {
1291: if ($thesepriv{$privilege} ne 'F') {
1292: $thesepriv{$privilege}.=$restrictions;
1293: }
1294: }
1295: }
1296: } split(/:/,$allroles{$_});
1297: $thesestr='';
1298: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
1299: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1300: } keys %allroles;
1301: $userroles.='user.adv='.$adv."\n".
1302: 'user.author='.$author."\n";
1303: $ENV{'user.adv'}=$adv;
1304: }
1305: return $userroles;
1306: }
1307:
1308: # --------------------------------------------------------------- get interface
1309:
1310: sub get {
1311: my ($namespace,$storearr,$udomain,$uname)=@_;
1312: my $items='';
1313: map {
1314: $items.=escape($_).'&';
1315: } @$storearr;
1316: $items=~s/\&$//;
1317: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1318: if (!$uname) { $uname=$ENV{'user.name'}; }
1319: my $uhome=&homeserver($uname,$udomain);
1320:
1321: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1322: my @pairs=split(/\&/,$rep);
1323: my %returnhash=();
1324: my $i=0;
1325: map {
1326: $returnhash{$_}=unescape($pairs[$i]);
1327: $i++;
1328: } @$storearr;
1329: return %returnhash;
1330: }
1331:
1332: # --------------------------------------------------------------- del interface
1333:
1334: sub del {
1335: my ($namespace,$storearr,$udomain,$uname)=@_;
1336: my $items='';
1337: map {
1338: $items.=escape($_).'&';
1339: } @$storearr;
1340: $items=~s/\&$//;
1341: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1342: if (!$uname) { $uname=$ENV{'user.name'}; }
1343: my $uhome=&homeserver($uname,$udomain);
1344:
1345: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1346: }
1347:
1348: # -------------------------------------------------------------- dump interface
1349:
1350: sub dump {
1351: my ($namespace,$udomain,$uname)=@_;
1352: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1353: if (!$uname) { $uname=$ENV{'user.name'}; }
1354: my $uhome=&homeserver($uname,$udomain);
1355: my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
1356: my @pairs=split(/\&/,$rep);
1357: my %returnhash=();
1358: map {
1359: my ($key,$value)=split(/=/,$_);
1360: $returnhash{unescape($key)}=unescape($value);
1361: } @pairs;
1362: return %returnhash;
1363: }
1364:
1365: # --------------------------------------------------------------- put interface
1366:
1367: sub put {
1368: my ($namespace,$storehash,$udomain,$uname)=@_;
1369: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1370: if (!$uname) { $uname=$ENV{'user.name'}; }
1371: my $uhome=&homeserver($uname,$udomain);
1372: my $items='';
1373: map {
1374: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1375: } keys %$storehash;
1376: $items=~s/\&$//;
1377: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1378: }
1379:
1380: # ------------------------------------------------------ critical put interface
1381:
1382: sub cput {
1383: my ($namespace,$storehash,$udomain,$uname)=@_;
1384: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1385: if (!$uname) { $uname=$ENV{'user.name'}; }
1386: my $uhome=&homeserver($uname,$udomain);
1387: my $items='';
1388: map {
1389: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1390: } keys %$storehash;
1391: $items=~s/\&$//;
1392: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1393: }
1394:
1395: # -------------------------------------------------------------- eget interface
1396:
1397: sub eget {
1398: my ($namespace,$storearr,$udomain,$uname)=@_;
1399: my $items='';
1400: map {
1401: $items.=escape($_).'&';
1402: } @$storearr;
1403: $items=~s/\&$//;
1404: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1405: if (!$uname) { $uname=$ENV{'user.name'}; }
1406: my $uhome=&homeserver($uname,$udomain);
1407: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1408: my @pairs=split(/\&/,$rep);
1409: my %returnhash=();
1410: my $i=0;
1411: map {
1412: $returnhash{$_}=unescape($pairs[$i]);
1413: $i++;
1414: } @$storearr;
1415: return %returnhash;
1416: }
1417:
1418: # ------------------------------------------------- Check for a user privilege
1419:
1420: sub allowed {
1421: my ($priv,$uri)=@_;
1422:
1423: my $orguri=$uri;
1424: $uri=&declutter($uri);
1425:
1426: # Free bre access to adm and meta resources
1427:
1428: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1429: return 'F';
1430: }
1431:
1432: # Free bre to public access
1433:
1434: if ($priv eq 'bre') {
1435: if (&metadata($uri,'copyright') eq 'public') { return 'F'; }
1436: }
1437:
1438: my $thisallowed='';
1439: my $statecond=0;
1440: my $courseprivid='';
1441:
1442: # Course
1443:
1444: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1445: $thisallowed.=$1;
1446: }
1447:
1448: # Domain
1449:
1450: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1451: =~/$priv\&([^\:]*)/) {
1452: $thisallowed.=$1;
1453: }
1454:
1455: # Course: uri itself is a course
1456: my $courseuri=$uri;
1457: $courseuri=~s/\_(\d)/\/$1/;
1458: $courseuri=~s/^([^\/])/\/$1/;
1459:
1460: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1461: =~/$priv\&([^\:]*)/) {
1462: $thisallowed.=$1;
1463: }
1464:
1465: # Full access at system, domain or course-wide level? Exit.
1466:
1467: if ($thisallowed=~/F/) {
1468: return 'F';
1469: }
1470:
1471: # If this is generating or modifying users, exit with special codes
1472:
1473: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1474: return $thisallowed;
1475: }
1476: #
1477: # Gathered so far: system, domain and course wide privileges
1478: #
1479: # Course: See if uri or referer is an individual resource that is part of
1480: # the course
1481:
1482: if ($ENV{'request.course.id'}) {
1483: $courseprivid=$ENV{'request.course.id'};
1484: if ($ENV{'request.course.sec'}) {
1485: $courseprivid.='/'.$ENV{'request.course.sec'};
1486: }
1487: $courseprivid=~s/\_/\//;
1488: my $checkreferer=1;
1489: my @uriparts=split(/\//,$uri);
1490: my $filename=$uriparts[$#uriparts];
1491: my $pathname=$uri;
1492: $pathname=~s/\/$filename$//;
1493: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1494: /\&$filename\:([\d\|]+)\&/) {
1495: $statecond=$1;
1496: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1497: =~/$priv\&([^\:]*)/) {
1498: $thisallowed.=$1;
1499: $checkreferer=0;
1500: }
1501: }
1502:
1503: if ($checkreferer) {
1504: my $refuri=$ENV{'httpref.'.$orguri};
1505:
1506: unless ($refuri) {
1507: map {
1508: if ($_=~/^httpref\..*\*/) {
1509: my $pattern=$_;
1510: $pattern=~s/^httpref\.\/res\///;
1511: $pattern=~s/\*/\[\^\/\]\+/g;
1512: $pattern=~s/\//\\\//g;
1513: if ($orguri=~/$pattern/) {
1514: $refuri=$ENV{$_};
1515: }
1516: }
1517: } keys %ENV;
1518: }
1519: if ($refuri) {
1520: $refuri=&declutter($refuri);
1521: my @uriparts=split(/\//,$refuri);
1522: my $filename=$uriparts[$#uriparts];
1523: my $pathname=$refuri;
1524: $pathname=~s/\/$filename$//;
1525: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1526: /\&$filename\:([\d\|]+)\&/) {
1527: my $refstatecond=$1;
1528: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1529: =~/$priv\&([^\:]*)/) {
1530: $thisallowed.=$1;
1531: $uri=$refuri;
1532: $statecond=$refstatecond;
1533: }
1534: }
1535: }
1536: }
1537: }
1538:
1539: #
1540: # Gathered now: all privileges that could apply, and condition number
1541: #
1542: #
1543: # Full or no access?
1544: #
1545:
1546: if ($thisallowed=~/F/) {
1547: return 'F';
1548: }
1549:
1550: unless ($thisallowed) {
1551: return '';
1552: }
1553:
1554: # Restrictions exist, deal with them
1555: #
1556: # C:according to course preferences
1557: # R:according to resource settings
1558: # L:unless locked
1559: # X:according to user session state
1560: #
1561:
1562: # Possibly locked functionality, check all courses
1563: # Locks might take effect only after 10 minutes cache expiration for other
1564: # courses, and 2 minutes for current course
1565:
1566: my $envkey;
1567: if ($thisallowed=~/L/) {
1568: foreach $envkey (keys %ENV) {
1569: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1570: my $courseid=$2;
1571: my $roleid=$1.'.'.$2;
1572: $courseid=~s/^\///;
1573: my $expiretime=600;
1574: if ($ENV{'request.role'} eq $roleid) {
1575: $expiretime=120;
1576: }
1577: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1578: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1579: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1580: &coursedescription($courseid);
1581: }
1582: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1583: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1584: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1585: &log($ENV{'user.domain'},$ENV{'user.name'},
1586: $ENV{'user.host'},
1587: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1588: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1589: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1590: return '';
1591: }
1592: }
1593: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1594: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1595: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1596: &log($ENV{'user.domain'},$ENV{'user.name'},
1597: $ENV{'user.host'},
1598: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1599: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1600: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1601: return '';
1602: }
1603: }
1604: }
1605: }
1606: }
1607:
1608: #
1609: # Rest of the restrictions depend on selected course
1610: #
1611:
1612: unless ($ENV{'request.course.id'}) {
1613: return '1';
1614: }
1615:
1616: #
1617: # Now user is definitely in a course
1618: #
1619:
1620:
1621: # Course preferences
1622:
1623: if ($thisallowed=~/C/) {
1624: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1625: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1626: =~/\,$rolecode\,/) {
1627: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1628: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1629: $ENV{'request.course.id'});
1630: return '';
1631: }
1632: }
1633:
1634: # Resource preferences
1635:
1636: if ($thisallowed=~/R/) {
1637: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1638: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1639: if (-e $filename) {
1640: my @content;
1641: {
1642: my $fh=Apache::File->new($filename);
1643: @content=<$fh>;
1644: }
1645: if (join('',@content)=~
1646: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1647: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1648: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1649: return '';
1650:
1651: }
1652: }
1653: }
1654:
1655: # Restricted by state?
1656:
1657: if ($thisallowed=~/X/) {
1658: if (&condval($statecond)) {
1659: return '2';
1660: } else {
1661: return '';
1662: }
1663: }
1664:
1665: return 'F';
1666: }
1667:
1668: # ----------------------------------------------------------------- Define Role
1669:
1670: sub definerole {
1671: if (allowed('mcr','/')) {
1672: my ($rolename,$sysrole,$domrole,$courole)=@_;
1673: map {
1674: my ($crole,$cqual)=split(/\&/,$_);
1675: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1676: if ($pr{'cr:s'}=~/$crole\&/) {
1677: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1678: return "refused:s:$crole&$cqual";
1679: }
1680: }
1681: } split('/',$sysrole);
1682: map {
1683: my ($crole,$cqual)=split(/\&/,$_);
1684: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1685: if ($pr{'cr:d'}=~/$crole\&/) {
1686: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1687: return "refused:d:$crole&$cqual";
1688: }
1689: }
1690: } split('/',$domrole);
1691: map {
1692: my ($crole,$cqual)=split(/\&/,$_);
1693: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1694: if ($pr{'cr:c'}=~/$crole\&/) {
1695: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1696: return "refused:c:$crole&$cqual";
1697: }
1698: }
1699: } split('/',$courole);
1700: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1701: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1702: "rolesdef_$rolename=".
1703: escape($sysrole.'_'.$domrole.'_'.$courole);
1704: return reply($command,$ENV{'user.home'});
1705: } else {
1706: return 'refused';
1707: }
1708: }
1709:
1710: # ---------------- Make a metadata query against the network of library servers
1711:
1712: sub metadata_query {
1713: my ($query,$custom,$customshow)=@_;
1714: my %rhash;
1715: for my $server (keys %libserv) {
1716: unless ($custom or $customshow) {
1717: my $reply=&reply("querysend:".&escape($query),$server);
1718: $rhash{$server}=$reply;
1719: }
1720: else {
1721: my $reply=&reply("querysend:".&escape($query).':'.
1722: &escape($custom).':'.&escape($customshow),
1723: $server);
1724: $rhash{$server}=$reply;
1725: }
1726: }
1727: return \%rhash;
1728: }
1729:
1730: # ------------------------------------------------------------------ Plain Text
1731:
1732: sub plaintext {
1733: my $short=shift;
1734: return $prp{$short};
1735: }
1736:
1737: # ------------------------------------------------------------------ Plain Text
1738:
1739: sub fileembstyle {
1740: my $ending=lc(shift);
1741: return $fe{$ending};
1742: }
1743:
1744: # ------------------------------------------------------------ Description Text
1745:
1746: sub filedescription {
1747: my $ending=lc(shift);
1748: return $fd{$ending};
1749: }
1750:
1751: # ----------------------------------------------------------------- Assign Role
1752:
1753: sub assignrole {
1754: my ($udom,$uname,$url,$role,$end,$start)=@_;
1755: my $mrole;
1756: if ($role =~ /^cr\//) {
1757: unless (&allowed('ccr',$url)) {
1758: &logthis('Refused custom assignrole: '.
1759: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1760: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1761: return 'refused';
1762: }
1763: $mrole='cr';
1764: } else {
1765: my $cwosec=$url;
1766: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1767: unless (&allowed('c'.$role,$cwosec)) {
1768: &logthis('Refused assignrole: '.
1769: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1770: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1771: return 'refused';
1772: }
1773: $mrole=$role;
1774: }
1775: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1776: "$udom:$uname:$url".'_'."$mrole=$role";
1777: if ($end) { $command.='_'.$end; }
1778: if ($start) {
1779: if ($end) {
1780: $command.='_'.$start;
1781: } else {
1782: $command.='_0_'.$start;
1783: }
1784: }
1785: return &reply($command,&homeserver($uname,$udom));
1786: }
1787:
1788: # -------------------------------------------------- Modify user authentication
1789: sub modifyuserauth {
1790: my ($udom,$uname,$umode,$upass)=@_;
1791: my $uhome=&homeserver($uname,$udom);
1792: &logthis('Call to modify user authentication'.$udom.', '.$uname.', '.
1793: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1794: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
1795: &escape($upass),$uhome);
1796: unless ($reply eq 'ok') {
1797: return 'error: '.$reply;
1798: }
1799: return 'ok';
1800: }
1801:
1802: # --------------------------------------------------------------- Modify a user
1803:
1804:
1805: sub modifyuser {
1806: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1807: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1808: $umode.', '.$first.', '.$middle.', '.
1809: $last.', '.$gene.' by '.
1810: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1811: my $uhome=&homeserver($uname,$udom);
1812: # ----------------------------------------------------------------- Create User
1813: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1814: my $unhome='';
1815: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1816: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1817: } else {
1818: my $tryserver;
1819: my $loadm=10000000;
1820: foreach $tryserver (keys %libserv) {
1821: if ($hostdom{$tryserver} eq $udom) {
1822: my $answer=reply('load',$tryserver);
1823: if (($answer=~/\d+/) && ($answer<$loadm)) {
1824: $loadm=$answer;
1825: $unhome=$tryserver;
1826: }
1827: }
1828: }
1829: }
1830: if (($unhome eq '') || ($unhome eq 'no_host')) {
1831: return 'error: find home';
1832: }
1833: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1834: &escape($upass),$unhome);
1835: unless ($reply eq 'ok') {
1836: return 'error: '.$reply;
1837: }
1838: $uhome=&homeserver($uname,$udom);
1839: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1840: return 'error: verify home';
1841: }
1842: }
1843: # ---------------------------------------------------------------------- Add ID
1844: if ($uid) {
1845: $uid=~tr/A-Z/a-z/;
1846: my %uidhash=&idrget($udom,$uname);
1847: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1848: unless ($uid eq $uidhash{$uname}) {
1849: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1850: }
1851: } else {
1852: &idput($udom,($uname => $uid));
1853: }
1854: }
1855: # -------------------------------------------------------------- Add names, etc
1856: my %names=&get('environment',
1857: ['firstname','middlename','lastname','generation'],
1858: $udom,$uname);
1859: if ($first) { $names{'firstname'} = $first; }
1860: if ($middle) { $names{'middlename'} = $middle; }
1861: if ($last) { $names{'lastname'} = $last; }
1862: if ($gene) { $names{'generation'} = $gene; }
1863: my $reply = &put('environment', \%names, $udom,$uname);
1864: if ($reply ne 'ok') { return 'error: '.$reply; }
1865: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1866: $umode.', '.$first.', '.$middle.', '.
1867: $last.', '.$gene.' by '.
1868: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1869: return 'ok';
1870: }
1871:
1872: # -------------------------------------------------------------- Modify student
1873:
1874: sub modifystudent {
1875: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1876: $end,$start)=@_;
1877: my $cid='';
1878: unless ($cid=$ENV{'request.course.id'}) {
1879: return 'not_in_class';
1880: }
1881: # --------------------------------------------------------------- Make the user
1882: my $reply=&modifyuser
1883: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1884: unless ($reply eq 'ok') { return $reply; }
1885: my $uhome=&homeserver($uname,$udom);
1886: if (($uhome eq '') || ($uhome eq 'no_host')) {
1887: return 'error: no such user';
1888: }
1889: # -------------------------------------------------- Add student to course list
1890: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1891: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1892: &escape($uname.':'.$udom).'='.
1893: &escape($end.':'.$start),
1894: $ENV{'course.'.$cid.'.home'});
1895: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1896: return 'error: '.$reply;
1897: }
1898: # ---------------------------------------------------- Add student role to user
1899: my $uurl='/'.$cid;
1900: $uurl=~s/\_/\//g;
1901: if ($usec) {
1902: $uurl.='/'.$usec;
1903: }
1904: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1905: }
1906:
1907: # ------------------------------------------------- Write to course preferences
1908:
1909: sub writecoursepref {
1910: my ($courseid,%prefs)=@_;
1911: $courseid=~s/^\///;
1912: $courseid=~s/\_/\//g;
1913: my ($cdomain,$cnum)=split(/\//,$courseid);
1914: my $chome=homeserver($cnum,$cdomain);
1915: if (($chome eq '') || ($chome eq 'no_host')) {
1916: return 'error: no such course';
1917: }
1918: my $cstring='';
1919: map {
1920: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1921: } keys %prefs;
1922: $cstring=~s/\&$//;
1923: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1924: }
1925:
1926: # ---------------------------------------------------------- Make/modify course
1927:
1928: sub createcourse {
1929: my ($udom,$description,$url)=@_;
1930: $url=&declutter($url);
1931: my $cid='';
1932: unless (&allowed('ccc',$ENV{'user.domain'})) {
1933: return 'refused';
1934: }
1935: unless ($udom eq $ENV{'user.domain'}) {
1936: return 'refused';
1937: }
1938: # ------------------------------------------------------------------- Create ID
1939: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1940: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1941: # ----------------------------------------------- Make sure that does not exist
1942: my $uhome=&homeserver($uname,$udom);
1943: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1944: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1945: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1946: $uhome=&homeserver($uname,$udom);
1947: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1948: return 'error: unable to generate unique course-ID';
1949: }
1950: }
1951: # ------------------------------------------------------------- Make the course
1952: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1953: $ENV{'user.home'});
1954: unless ($reply eq 'ok') { return 'error: '.$reply; }
1955: $uhome=&homeserver($uname,$udom);
1956: if (($uhome eq '') || ($uhome eq 'no_host')) {
1957: return 'error: no such course';
1958: }
1959: &writecoursepref($udom.'_'.$uname,
1960: ('description' => $description,
1961: 'url' => $url));
1962: return '/'.$udom.'/'.$uname;
1963: }
1964:
1965: # ---------------------------------------------------------- Assign Custom Role
1966:
1967: sub assigncustomrole {
1968: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1969: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1970: $end,$start);
1971: }
1972:
1973: # ----------------------------------------------------------------- Revoke Role
1974:
1975: sub revokerole {
1976: my ($udom,$uname,$url,$role)=@_;
1977: my $now=time;
1978: return &assignrole($udom,$uname,$url,$role,$now);
1979: }
1980:
1981: # ---------------------------------------------------------- Revoke Custom Role
1982:
1983: sub revokecustomrole {
1984: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1985: my $now=time;
1986: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1987: }
1988:
1989: # ------------------------------------------------------------ Directory lister
1990:
1991: sub dirlist {
1992: my $uri=shift;
1993: $uri=~s/^\///;
1994: $uri=~s/\/$//;
1995: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1996: if ($udom) {
1997: if ($uname) {
1998: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1999: homeserver($uname,$udom));
2000: return split(/:/,$listing);
2001: } else {
2002: my $tryserver;
2003: my %allusers=();
2004: foreach $tryserver (keys %libserv) {
2005: if ($hostdom{$tryserver} eq $udom) {
2006: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
2007: $tryserver);
2008: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2009: && ($listing ne 'con_lost')) {
2010: map {
2011: my ($entry,@stat)=split(/&/,$_);
2012: $allusers{$entry}=1;
2013: } split(/:/,$listing);
2014: }
2015: }
2016: }
2017: my $alluserstr='';
2018: map {
2019: $alluserstr.=$_.'&user:';
2020: } sort keys %allusers;
2021: $alluserstr=~s/:$//;
2022: return split(/:/,$alluserstr);
2023: }
2024: } else {
2025: my $tryserver;
2026: my %alldom=();
2027: foreach $tryserver (keys %libserv) {
2028: $alldom{$hostdom{$tryserver}}=1;
2029: }
2030: my $alldomstr='';
2031: map {
2032: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2033: } sort keys %alldom;
2034: $alldomstr=~s/:$//;
2035: return split(/:/,$alldomstr);
2036: }
2037: }
2038:
2039: # -------------------------------------------------------- Value of a Condition
2040:
2041: sub directcondval {
2042: my $number=shift;
2043: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2044: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2045: } else {
2046: return 2;
2047: }
2048: }
2049:
2050: sub condval {
2051: my $condidx=shift;
2052: my $result=0;
2053: my $allpathcond='';
2054: map {
2055: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2056: $allpathcond.=
2057: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2058: }
2059: } split(/\|/,$condidx);
2060: $allpathcond=~s/\|$//;
2061: if ($ENV{'request.course.id'}) {
2062: if ($allpathcond) {
2063: my $operand='|';
2064: my @stack;
2065: map {
2066: if ($_ eq '(') {
2067: push @stack,($operand,$result)
2068: } elsif ($_ eq ')') {
2069: my $before=pop @stack;
2070: if (pop @stack eq '&') {
2071: $result=$result>$before?$before:$result;
2072: } else {
2073: $result=$result>$before?$result:$before;
2074: }
2075: } elsif (($_ eq '&') || ($_ eq '|')) {
2076: $operand=$_;
2077: } else {
2078: my $new=directcondval($_);
2079: if ($operand eq '&') {
2080: $result=$result>$new?$new:$result;
2081: } else {
2082: $result=$result>$new?$result:$new;
2083: }
2084: }
2085: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
2086: }
2087: }
2088: return $result;
2089: }
2090:
2091: # --------------------------------------------------------- Value of a Variable
2092:
2093: sub EXT {
2094: my ($varname,$symbparm)=@_;
2095: unless ($varname) { return ''; }
2096: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2097: my $rest;
2098: if ($therest[0]) {
2099: $rest=join('.',@therest);
2100: } else {
2101: $rest='';
2102: }
2103: my $qualifierrest=$qualifier;
2104: if ($rest) { $qualifierrest.='.'.$rest; }
2105: my $spacequalifierrest=$space;
2106: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2107: if ($realm eq 'user') {
2108: # --------------------------------------------------------------- user.resource
2109: if ($space eq 'resource') {
2110: my %restored=&restore();
2111: return $restored{$qualifierrest};
2112: # ----------------------------------------------------------------- user.access
2113: } elsif ($space eq 'access') {
2114: return &allowed($qualifier,$rest);
2115: # ------------------------------------------ user.preferences, user.environment
2116: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2117: return $ENV{join('.',('environment',$qualifierrest))};
2118: # ----------------------------------------------------------------- user.course
2119: } elsif ($space eq 'course') {
2120: return $ENV{join('.',('request.course',$qualifier))};
2121: # ------------------------------------------------------------------- user.role
2122: } elsif ($space eq 'role') {
2123: my ($role,$where)=split(/\./,$ENV{'request.role'});
2124: if ($qualifier eq 'value') {
2125: return $role;
2126: } elsif ($qualifier eq 'extent') {
2127: return $where;
2128: }
2129: # ----------------------------------------------------------------- user.domain
2130: } elsif ($space eq 'domain') {
2131: return $ENV{'user.domain'};
2132: # ------------------------------------------------------------------- user.name
2133: } elsif ($space eq 'name') {
2134: return $ENV{'user.name'};
2135: # ---------------------------------------------------- Any other user namespace
2136: } else {
2137: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2138: my %reply=&get($space,[$item]);
2139: return $reply{$item};
2140: }
2141: } elsif ($realm eq 'request') {
2142: # ------------------------------------------------------------- request.browser
2143: if ($space eq 'browser') {
2144: return $ENV{'browser.'.$qualifier};
2145: # ------------------------------------------------------------ request.filename
2146: } else {
2147: return $ENV{'request.'.$spacequalifierrest};
2148: }
2149: } elsif ($realm eq 'course') {
2150: # ---------------------------------------------------------- course.description
2151: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
2152: $spacequalifierrest};
2153: } elsif ($realm eq 'resource') {
2154: if ($ENV{'request.course.id'}) {
2155:
2156: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2157:
2158:
2159: # ----------------------------------------------------- Cascading lookup scheme
2160: my $symbp;
2161: if ($symbparm) {
2162: $symbp=$symbparm;
2163: } else {
2164: $symbp=&symbread();
2165: }
2166: my $mapp=(split(/\_\_\_/,$symbp))[0];
2167:
2168: my $symbparm=$symbp.'.'.$spacequalifierrest;
2169: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2170:
2171: my $seclevel=
2172: $ENV{'request.course.id'}.'.['.
2173: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
2174: my $seclevelr=
2175: $ENV{'request.course.id'}.'.['.
2176: $ENV{'request.course.sec'}.'].'.$symbparm;
2177: my $seclevelm=
2178: $ENV{'request.course.id'}.'.['.
2179: $ENV{'request.course.sec'}.'].'.$mapparm;
2180:
2181: my $courselevel=
2182: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
2183: my $courselevelr=
2184: $ENV{'request.course.id'}.'.'.$symbparm;
2185: my $courselevelm=
2186: $ENV{'request.course.id'}.'.'.$mapparm;
2187:
2188: # ----------------------------------------------------------- first, check user
2189: my %resourcedata=get('resourcedata',
2190: [$courselevelr,$courselevelm,$courselevel]);
2191: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2192: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2193:
2194: if ($resourcedata{$courselevelr}) {
2195: return $resourcedata{$courselevelr}; }
2196: if ($resourcedata{$courselevelm}) {
2197: return $resourcedata{$courselevelm}; }
2198: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
2199:
2200: } else {
2201: if ($resourcedata{$courselevelr}!~/No such file/) {
2202: &logthis("<font color=blue>WARNING:".
2203: " Trying to get resource data for ".$ENV{'user.name'}." at "
2204: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
2205: "</font>");
2206: }
2207: }
2208:
2209: # -------------------------------------------------------- second, check course
2210:
2211: my $reply=&reply('get:'.
2212: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
2213: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2214: ':resourcedata:'.
2215: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
2216: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
2217: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
2218: if ($reply!~/^error\:/) {
2219: map {
2220: if ($_) { return &unescape($_); }
2221: } split(/\&/,$reply);
2222: }
2223: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
2224: &logthis("<font color=blue>WARNING:".
2225: " Getting ".$reply." asking for ".$varname." for ".
2226: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2227: ' at '.
2228: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
2229: ' from '.
2230: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
2231: "</font>");
2232: }
2233: # ------------------------------------------------------ third, check map parms
2234: my %parmhash=();
2235: my $thisparm='';
2236: if (tie(%parmhash,'GDBM_File',
2237: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
2238: $thisparm=$parmhash{$symbparm};
2239: untie(%parmhash);
2240: }
2241: if ($thisparm) { return $thisparm; }
2242: }
2243:
2244: # --------------------------------------------- last, look in resource metadata
2245:
2246: $spacequalifierrest=~s/\./\_/;
2247: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2248: if ($metadata) { return $metadata; }
2249: $metadata=&metadata($ENV{'request.filename'},
2250: 'parameter_'.$spacequalifierrest);
2251: if ($metadata) { return $metadata; }
2252:
2253: # ------------------------------------------------------------------ Cascade up
2254:
2255: unless ($space eq '0') {
2256: my ($part,$id)=split(/\_/,$space);
2257: if ($id) {
2258: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2259: $symbparm);
2260: if ($partgeneral) { return $partgeneral; }
2261: } else {
2262: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2263: $symbparm);
2264: if ($resourcegeneral) { return $resourcegeneral; }
2265: }
2266: }
2267:
2268: # ---------------------------------------------------- Any other user namespace
2269: } elsif ($realm eq 'environment') {
2270: # ----------------------------------------------------------------- environment
2271: return $ENV{'environment.'.$spacequalifierrest};
2272: } elsif ($realm eq 'system') {
2273: # ----------------------------------------------------------------- system.time
2274: if ($space eq 'time') {
2275: return time;
2276: }
2277: }
2278: return '';
2279: }
2280:
2281: # ---------------------------------------------------------------- Get metadata
2282:
2283: sub metadata {
2284: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2285:
2286: $uri=&declutter($uri);
2287: my $filename=$uri;
2288: $uri=~s/\.meta$//;
2289: #
2290: # Is the metadata already cached?
2291: # Look at timestamp of caching
2292: # Everything is cached by the main uri, libraries are never directly cached
2293: #
2294: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2295: #
2296: # Is this a recursive call for a library?
2297: #
2298: if ($liburi) {
2299: $liburi=&declutter($liburi);
2300: $filename=$liburi;
2301: }
2302: my %metathesekeys=();
2303: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2304: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2305: my $parser=HTML::TokeParser->new(\$metastring);
2306: my $token;
2307: undef %metathesekeys;
2308: while ($token=$parser->get_token) {
2309: if ($token->[0] eq 'S') {
2310: if (defined($token->[2]->{'package'})) {
2311: #
2312: # This is a package - get package info
2313: #
2314: my $package=$token->[2]->{'package'};
2315: my $keyroot='';
2316: if ($prefix) {
2317: $keyroot.='_'.$prefix;
2318: } else {
2319: if (defined($token->[2]->{'part'})) {
2320: $keyroot.='_'.$token->[2]->{'part'};
2321: }
2322: }
2323: if (defined($token->[2]->{'id'})) {
2324: $keyroot.='_'.$token->[2]->{'id'};
2325: }
2326: if ($metacache{$uri.':packages'}) {
2327: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2328: } else {
2329: $metacache{$uri.':packages'}=$package.$keyroot;
2330: }
2331: map {
2332: if ($_=~/^$package\&/) {
2333: my ($pack,$name,$subp)=split(/\&/,$_);
2334: my $value=$packagetab{$_};
2335: my $part=$keyroot;
2336: $part=~s/^\_//;
2337: if ($subp eq 'display') {
2338: $value.=' [Part: '.$part.']';
2339: }
2340: my $unikey='parameter'.$keyroot.'_'.$name;
2341: $metathesekeys{$unikey}=1;
2342: $metacache{$uri.':'.$unikey.'.part'}=$part;
2343: unless
2344: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2345: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2346: }
2347: }
2348: } keys %packagetab;
2349: } else {
2350: #
2351: # This is not a package - some other kind of start tag
2352: #
2353: my $entry=$token->[1];
2354: my $unikey;
2355: if ($entry eq 'import') {
2356: $unikey='';
2357: } else {
2358: $unikey=$entry;
2359: }
2360: if ($prefix) {
2361: $unikey.=$prefix;
2362: } else {
2363: if (defined($token->[2]->{'part'})) {
2364: $unikey.='_'.$token->[2]->{'part'};
2365: }
2366: }
2367: if (defined($token->[2]->{'id'})) {
2368: $unikey.='_'.$token->[2]->{'id'};
2369: }
2370:
2371: if ($entry eq 'import') {
2372: #
2373: # Importing a library here
2374: #
2375: if (defined($depthcount)) { $depthcount++; } else
2376: { $depthcount=0; }
2377: if ($depthcount<20) {
2378: map {
2379: $metathesekeys{$_}=1;
2380: } split(/\,/,&metadata($uri,'keys',
2381: $parser->get_text('/import'),$unikey,
2382: $depthcount));
2383: }
2384: } else {
2385:
2386: if (defined($token->[2]->{'name'})) {
2387: $unikey.='_'.$token->[2]->{'name'};
2388: }
2389: $metathesekeys{$unikey}=1;
2390: map {
2391: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2392: } @{$token->[3]};
2393: unless (
2394: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
2395: ) { $metacache{$uri.':'.$unikey}=
2396: $metacache{$uri.':'.$unikey.'.default'};
2397: }
2398: # end of not-a-package not-a-library import
2399: }
2400: # end of not-a-package start tag
2401: }
2402: # the next is the end of "start tag"
2403: }
2404: }
2405: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2406: $metacache{$uri.':cachedtimestamp'}=time;
2407: # this is the end of "was not already recently cached
2408: }
2409: return $metacache{$uri.':'.$what};
2410: }
2411:
2412: # ------------------------------------------------- Update symbolic store links
2413:
2414: sub symblist {
2415: my ($mapname,%newhash)=@_;
2416: $mapname=declutter($mapname);
2417: my %hash;
2418: if (($ENV{'request.course.fn'}) && (%newhash)) {
2419: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2420: &GDBM_WRCREAT,0640)) {
2421: map {
2422: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2423: } keys %newhash;
2424: if (untie(%hash)) {
2425: return 'ok';
2426: }
2427: }
2428: }
2429: return 'error';
2430: }
2431:
2432: # ------------------------------------------------------ Return symb list entry
2433:
2434: sub symbread {
2435: my $thisfn=shift;
2436: unless ($thisfn) {
2437: if ($ENV{'request.symb'}) { return $ENV{'request.symb'}; }
2438: $thisfn=$ENV{'request.filename'};
2439: }
2440: $thisfn=declutter($thisfn);
2441: my %hash;
2442: my %bighash;
2443: my $syval='';
2444: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2445: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2446: &GDBM_READER,0640)) {
2447: $syval=$hash{$thisfn};
2448: untie(%hash);
2449: }
2450: # ---------------------------------------------------------- There was an entry
2451: if ($syval) {
2452: unless ($syval=~/\_\d+$/) {
2453: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2454: &appenv('request.ambiguous' => $thisfn);
2455: return '';
2456: }
2457: $syval.=$1;
2458: }
2459: } else {
2460: # ------------------------------------------------------- Was not in symb table
2461: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2462: &GDBM_READER,0640)) {
2463: # ---------------------------------------------- Get ID(s) for current resource
2464: my $ids=$bighash{'ids_/res/'.$thisfn};
2465: unless ($ids) {
2466: $ids=$bighash{'ids_/'.$thisfn};
2467: }
2468: if ($ids) {
2469: # ------------------------------------------------------------------- Has ID(s)
2470: my @possibilities=split(/\,/,$ids);
2471: if ($#possibilities==0) {
2472: # ----------------------------------------------- There is only one possibility
2473: my ($mapid,$resid)=split(/\./,$ids);
2474: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2475: } else {
2476: # ------------------------------------------ There is more than one possibility
2477: my $realpossible=0;
2478: map {
2479: my $file=$bighash{'src_'.$_};
2480: if (&allowed('bre',$file)) {
2481: my ($mapid,$resid)=split(/\./,$_);
2482: if ($bighash{'map_type_'.$mapid} ne 'page') {
2483: $realpossible++;
2484: $syval=declutter($bighash{'map_id_'.$mapid}).
2485: '___'.$resid;
2486: }
2487: }
2488: } @possibilities;
2489: if ($realpossible!=1) { $syval=''; }
2490: }
2491: }
2492: untie(%bighash)
2493: }
2494: }
2495: if ($syval) {
2496: return $syval.'___'.$thisfn;
2497: }
2498: }
2499: &appenv('request.ambiguous' => $thisfn);
2500: return '';
2501: }
2502:
2503: # ---------------------------------------------------------- Return random seed
2504:
2505: sub numval {
2506: my $txt=shift;
2507: $txt=~tr/A-J/0-9/;
2508: $txt=~tr/a-j/0-9/;
2509: $txt=~tr/K-T/0-9/;
2510: $txt=~tr/k-t/0-9/;
2511: $txt=~tr/U-Z/0-5/;
2512: $txt=~tr/u-z/0-5/;
2513: $txt=~s/\D//g;
2514: return int($txt);
2515: }
2516:
2517: sub rndseed {
2518: my ($symb,$courseid,$domain,$username)=@_;
2519: if (!$symb) {
2520: unless ($symb=&symbread()) { return time; }
2521: }
2522: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2523: if (!$domain) {$domain=$ENV{'user.domain'};}
2524: if (!$username) {$username=$ENV{'user.name'};}
2525: {
2526: use integer;
2527: my $symbchck=unpack("%32C*",$symb) << 27;
2528: my $symbseed=numval($symb) << 22;
2529: my $namechck=unpack("%32C*",$username) << 17;
2530: my $nameseed=numval($username) << 12;
2531: my $domainseed=unpack("%32C*",$domain) << 7;
2532: my $courseseed=unpack("%32C*",$courseid);
2533: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2534: #uncommenting these lines can break things!
2535: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2536: #&Apache::lonxml::debug("rndseed :$num:$symb");
2537: return $num;
2538: }
2539: }
2540:
2541: sub ireceipt {
2542: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2543: my $cuname=unpack("%32C*",$funame);
2544: my $cudom=unpack("%32C*",$fudom);
2545: my $cucourseid=unpack("%32C*",$fucourseid);
2546: my $cusymb=unpack("%32C*",$fusymb);
2547: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2548: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2549: ($cunique%$cuname+
2550: $cunique%$cudom+
2551: $cusymb%$cuname+
2552: $cusymb%$cudom+
2553: $cucourseid%$cuname+
2554: $cucourseid%$cudom);
2555: }
2556:
2557: sub receipt {
2558: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2559: $ENV{'request.course.id'},&symbread());
2560: }
2561:
2562: # ------------------------------------------------------------ Serves up a file
2563: # returns either the contents of the file or a -1
2564: sub getfile {
2565: my $file=shift;
2566: &repcopy($file);
2567: if (! -e $file ) { return -1; };
2568: my $fh=Apache::File->new($file);
2569: my $a='';
2570: while (<$fh>) { $a .=$_; }
2571: return $a
2572: }
2573:
2574: sub filelocation {
2575: my ($dir,$file) = @_;
2576: my $location;
2577: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2578: if ($file=~m:^/~:) { # is a contruction space reference
2579: $location = $file;
2580: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2581: } else {
2582: $file=~s/^$perlvar{'lonDocRoot'}//;
2583: $file=~s:^/*res::;
2584: if ( !( $file =~ m:^/:) ) {
2585: $location = $dir. '/'.$file;
2586: } else {
2587: $location = '/home/httpd/html/res'.$file;
2588: }
2589: }
2590: $location=~s://+:/:g; # remove duplicate /
2591: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2592: return $location;
2593: }
2594:
2595: sub hreflocation {
2596: my ($dir,$file)=@_;
2597: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2598: my $finalpath=filelocation($dir,$file);
2599: $finalpath=~s/^\/home\/httpd\/html//;
2600: return $finalpath;
2601: } else {
2602: return $file;
2603: }
2604: }
2605:
2606: # ------------------------------------------------------------- Declutters URLs
2607:
2608: sub declutter {
2609: my $thisfn=shift;
2610: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2611: $thisfn=~s/^\///;
2612: $thisfn=~s/^res\///;
2613: return $thisfn;
2614: }
2615:
2616: # -------------------------------------------------------- Escape Special Chars
2617:
2618: sub escape {
2619: my $str=shift;
2620: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2621: return $str;
2622: }
2623:
2624: # ----------------------------------------------------- Un-Escape Special Chars
2625:
2626: sub unescape {
2627: my $str=shift;
2628: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2629: return $str;
2630: }
2631:
2632: # ================================================================ Main Program
2633:
2634: sub goodbye {
2635: &flushcourselogs();
2636: &logthis("Shutting down");
2637: }
2638:
2639: BEGIN {
2640: # ------------------------------------------------------------ Read access.conf
2641: {
2642: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2643:
2644: while (my $configline=<$config>) {
2645: if ($configline =~ /PerlSetVar/) {
2646: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2647: chomp($varvalue);
2648: $perlvar{$varname}=$varvalue;
2649: }
2650: }
2651: }
2652:
2653: # ------------------------------------------------------------- Read hosts file
2654: {
2655: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2656:
2657: while (my $configline=<$config>) {
2658: chomp($configline);
2659: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2660: $hostname{$id}=$name;
2661: $hostdom{$id}=$domain;
2662: $hostip{$id}=$ip;
2663: if ($role eq 'library') { $libserv{$id}=$name; }
2664: }
2665: }
2666:
2667: # ------------------------------------------------------ Read spare server file
2668: {
2669: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2670:
2671: while (my $configline=<$config>) {
2672: chomp($configline);
2673: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2674: $spareid{$configline}=1;
2675: }
2676: }
2677: }
2678: # ------------------------------------------------------------ Read permissions
2679: {
2680: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2681:
2682: while (my $configline=<$config>) {
2683: chomp($configline);
2684: if ($configline) {
2685: my ($role,$perm)=split(/ /,$configline);
2686: if ($perm ne '') { $pr{$role}=$perm; }
2687: }
2688: }
2689: }
2690:
2691: # -------------------------------------------- Read plain texts for permissions
2692: {
2693: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2694:
2695: while (my $configline=<$config>) {
2696: chomp($configline);
2697: if ($configline) {
2698: my ($short,$plain)=split(/:/,$configline);
2699: if ($plain ne '') { $prp{$short}=$plain; }
2700: }
2701: }
2702: }
2703:
2704: # ---------------------------------------------------------- Read package table
2705: {
2706: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2707:
2708: while (my $configline=<$config>) {
2709: chomp($configline);
2710: my ($short,$plain)=split(/:/,$configline);
2711: my ($pack,$name)=split(/\&/,$short);
2712: if ($plain ne '') {
2713: $packagetab{$pack.'&'.$name.'&name'}=$name;
2714: $packagetab{$short}=$plain;
2715: }
2716: }
2717: }
2718:
2719: # ------------------------------------------------------------- Read file types
2720: {
2721: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2722:
2723: while (my $configline=<$config>) {
2724: next if ($configline =~ /^\#/);
2725: chomp($configline);
2726: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2727: if ($descr[0] ne '') {
2728: $fe{$ending}=lc($emb);
2729: $fd{$ending}=join(' ',@descr);
2730: }
2731: }
2732: }
2733:
2734: %metacache=();
2735:
2736: $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
2737: $dumpcount=0;
2738:
2739: &logtouch();
2740: &logthis('<font color=yellow>INFO: Read configuration</font>');
2741: }
2742:
2743: 1;
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