1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.185 2001/12/06 21:03:02 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 1.185 2001/12/06 21:03:02 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);
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: }
782:
783: sub courselog {
784: my $what=shift;
785: $what=time.':'.$what;
786: unless ($ENV{'request.course.id'}) { return ''; }
787: if (defined $courselogs{$ENV{'request.course.id'}}) {
788: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
789: } else {
790: $courselogs{$ENV{'request.course.id'}}.=$what;
791: }
792: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
793: &flushcourselogs();
794: }
795: }
796:
797: sub courseacclog {
798: my $fnsymb=shift;
799: unless ($ENV{'request.course.id'}) { return ''; }
800: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
801: if ($what=~/(problem|exam|quiz|assess|survey|form)$/) {
802: map {
803: if ($_=~/^form\.(.*)/) {
804: $what.=':'.$1.'='.$ENV{$_};
805: }
806: } keys %ENV;
807: }
808: &courselog($what);
809: }
810:
811: sub countacc {
812: my $url=&declutter(shift);
813: unless ($ENV{'request.course.id'}) { return ''; }
814: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
815: my $key=$processmarker.'___'.$url.'___count';
816: if (defined($accesshash{$key})) {
817: $accesshash{$key}++;
818: } else {
819: $accesshash{$key}=1;
820: }
821: }
822:
823: # ----------------------------------------------------------- Check out an item
824:
825: sub checkout {
826: my ($symb,$tuname,$tudom,$tcrsid)=@_;
827: my $now=time;
828: my $lonhost=$perlvar{'lonHostID'};
829: my $infostr=&escape(
830: $tuname.'&'.
831: $tudom.'&'.
832: $tcrsid.'&'.
833: $symb.'&'.
834: $now.'&'.$ENV{'REMOTE_ADDR'});
835: my $token=&reply('tmpput:'.$infostr,$lonhost);
836: if ($token=~/^error\:/) {
837: &logthis("<font color=blue>WARNING: ".
838: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
839: "</font>");
840: return '';
841: }
842:
843: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
844: $token=~tr/a-z/A-Z/;
845:
846: my %infohash=('resource.0.outtoken' => $token,
847: 'resource.0.checkouttime' => $now,
848: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
849:
850: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
851: return '';
852: } else {
853: &logthis("<font color=blue>WARNING: ".
854: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
855: "</font>");
856: }
857:
858: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
859: &escape('Checkout '.$infostr.' - '.
860: $token)) ne 'ok') {
861: return '';
862: } else {
863: &logthis("<font color=blue>WARNING: ".
864: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
865: "</font>");
866: }
867: return $token;
868: }
869:
870: # ------------------------------------------------------------ Check in an item
871:
872: sub checkin {
873: my $token=shift;
874: my $now=time;
875: my ($ta,$tb,$lonhost)=split(/\*/,$token);
876: $lonhost=~tr/A-Z/a-z/;
877: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
878: $dtoken=~s/\W/\_/g;
879: my ($tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
880: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
881:
882: unless (($tuname) && ($tudom)) {
883: &logthis('Check in '.$token.' ('.$dtoken.') failed');
884: return '';
885: }
886:
887: unless (&allowed('mgr',$tcrsid)) {
888: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
889: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
890: return '';
891: }
892:
893: my %infohash=('resource.0.intoken' => $token,
894: 'resource.0.checkintime' => $now,
895: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
896:
897: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
898: return '';
899: }
900:
901: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
902: &escape('Checkin - '.$token)) ne 'ok') {
903: return '';
904: }
905:
906: return ($symb,$tuname,$tudom,$tcrsid);
907: }
908:
909: # --------------------------------------------- Set Expire Date for Spreadsheet
910:
911: sub expirespread {
912: my ($uname,$udom,$stype,$usymb)=@_;
913: my $cid=$ENV{'request.course.id'};
914: if ($cid) {
915: my $now=time;
916: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
917: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
918: $ENV{'course.'.$cid.'.num'}.
919: ':nohist_expirationdates:'.
920: &escape($key).'='.$now,
921: $ENV{'course.'.$cid.'.home'})
922: }
923: return 'ok';
924: }
925:
926: # ----------------------------------------------------- Devalidate Spreadsheets
927:
928: sub devalidate {
929: my $symb=shift;
930: my $cid=$ENV{'request.course.id'};
931: if ($cid) {
932: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
933: my $status=
934: &del('nohist_calculatedsheet',
935: [$key.'studentcalc'],
936: $ENV{'course.'.$cid.'.domain'},
937: $ENV{'course.'.$cid.'.num'})
938: .' '.
939: &del('nohist_calculatedsheets_'.$cid,
940: [$key.'assesscalc:'.$symb]);
941: unless ($status eq 'ok ok') {
942: &logthis('Could not devalidate spreadsheet '.
943: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
944: $symb.': '.$status);
945: }
946: }
947: }
948:
949: sub hash2str {
950: my (%hash)=@_;
951: my $result='';
952: map { $result.=escape($_).'='.escape($hash{$_}).'&'; } keys %hash;
953: $result=~s/\&$//;
954: return $result;
955: }
956:
957: sub str2hash {
958: my ($string) = @_;
959: my %returnhash;
960: map {
961: my ($name,$value)=split(/\=/,$_);
962: $returnhash{&unescape($name)}=&unescape($value);
963: } split(/\&/,$string);
964: return %returnhash;
965: }
966:
967: # -------------------------------------------------------------------Temp Store
968:
969: sub tmpreset {
970: my ($symb,$namespace,$domain,$stuname) = @_;
971: if (!$symb) {
972: $symb=&symbread();
973: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
974: }
975: $symb=escape($symb);
976:
977: if (!$namespace) { $namespace=$ENV{'request.state'}; }
978: $namespace=~s/\//\_/g;
979: $namespace=~s/\W//g;
980:
981: #FIXME needs to do something for /pub resources
982: if (!$domain) { $domain=$ENV{'user.domain'}; }
983: if (!$stuname) { $stuname=$ENV{'user.name'}; }
984: my $path=$perlvar{'lonDaemons'}.'/tmp';
985: my %hash;
986: if (tie(%hash,'GDBM_File',
987: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
988: &GDBM_WRCREAT,0640)) {
989: foreach my $key (keys %hash) {
990: if ($key=~ /:$symb/) {
991: delete($hash{$key});
992: }
993: }
994: }
995: }
996:
997: sub tmpstore {
998: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
999:
1000: if (!$symb) {
1001: $symb=&symbread();
1002: if (!$symb) { $symb= $ENV{'request.url'}; }
1003: }
1004: $symb=escape($symb);
1005:
1006: if (!$namespace) {
1007: # I don't think we would ever want to store this for a course.
1008: # it seems this will only be used if we don't have a course.
1009: #$namespace=$ENV{'request.course.id'};
1010: #if (!$namespace) {
1011: $namespace=$ENV{'request.state'};
1012: #}
1013: }
1014: $namespace=~s/\//\_/g;
1015: $namespace=~s/\W//g;
1016: #FIXME needs to do something for /pub resources
1017: if (!$domain) { $domain=$ENV{'user.domain'}; }
1018: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1019: my $now=time;
1020: my %hash;
1021: my $path=$perlvar{'lonDaemons'}.'/tmp';
1022: if (tie(%hash,'GDBM_File',
1023: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1024: &GDBM_WRCREAT,0640)) {
1025: $hash{"version:$symb"}++;
1026: my $version=$hash{"version:$symb"};
1027: my $allkeys='';
1028: foreach my $key (keys(%$storehash)) {
1029: $allkeys.=$key.':';
1030: $hash{"$version:$symb:$key"}=$$storehash{$key};
1031: }
1032: $hash{"$version:$symb:timestamp"}=$now;
1033: $allkeys.='timestamp';
1034: $hash{"$version:keys:$symb"}=$allkeys;
1035: if (untie(%hash)) {
1036: return 'ok';
1037: } else {
1038: return "error:$!";
1039: }
1040: } else {
1041: return "error:$!";
1042: }
1043: }
1044:
1045: # -----------------------------------------------------------------Temp Restore
1046:
1047: sub tmprestore {
1048: my ($symb,$namespace,$domain,$stuname) = @_;
1049:
1050: if (!$symb) {
1051: $symb=&symbread();
1052: if (!$symb) { $symb= $ENV{'request.url'}; }
1053: }
1054: $symb=escape($symb);
1055:
1056: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1057: #FIXME needs to do something for /pub resources
1058: if (!$domain) { $domain=$ENV{'user.domain'}; }
1059: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1060:
1061: my %returnhash;
1062: $namespace=~s/\//\_/g;
1063: $namespace=~s/\W//g;
1064: my %hash;
1065: my $path=$perlvar{'lonDaemons'}.'/tmp';
1066: if (tie(%hash,'GDBM_File',
1067: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1068: &GDBM_READER,0640)) {
1069: my $version=$hash{"version:$symb"};
1070: $returnhash{'version'}=$version;
1071: my $scope;
1072: for ($scope=1;$scope<=$version;$scope++) {
1073: my $vkeys=$hash{"$scope:keys:$symb"};
1074: my @keys=split(/:/,$vkeys);
1075: my $key;
1076: $returnhash{"$scope:keys"}=$vkeys;
1077: foreach $key (@keys) {
1078: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1079: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1080: }
1081: }
1082: if (!(untie(%hash))) {
1083: return "error:$!";
1084: }
1085: } else {
1086: return "error:$!";
1087: }
1088: return %returnhash;
1089: }
1090:
1091: # ----------------------------------------------------------------------- Store
1092:
1093: sub store {
1094: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1095: my $home='';
1096:
1097: if ($stuname) { $home=&homeserver($stuname,$domain); }
1098:
1099: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1100:
1101: &devalidate($symb);
1102:
1103: $symb=escape($symb);
1104: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1105: if (!$domain) { $domain=$ENV{'user.domain'}; }
1106: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1107: if (!$home) { $home=$ENV{'user.home'}; }
1108: my $namevalue='';
1109: map {
1110: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1111: } keys %$storehash;
1112: $namevalue=~s/\&$//;
1113: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1114: }
1115:
1116: # -------------------------------------------------------------- Critical Store
1117:
1118: sub cstore {
1119: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1120: my $home='';
1121:
1122: if ($stuname) { $home=&homeserver($stuname,$domain); }
1123:
1124: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1125:
1126: &devalidate($symb);
1127:
1128: $symb=escape($symb);
1129: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1130: if (!$domain) { $domain=$ENV{'user.domain'}; }
1131: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1132: if (!$home) { $home=$ENV{'user.home'}; }
1133:
1134: my $namevalue='';
1135: map {
1136: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1137: } keys %$storehash;
1138: $namevalue=~s/\&$//;
1139: return critical("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1140: }
1141:
1142: # --------------------------------------------------------------------- Restore
1143:
1144: sub restore {
1145: my ($symb,$namespace,$domain,$stuname) = @_;
1146: my $home='';
1147:
1148: if ($stuname) { $home=&homeserver($stuname,$domain); }
1149:
1150: if (!$symb) {
1151: unless ($symb=escape(&symbread())) { return ''; }
1152: } else {
1153: $symb=&escape($symb);
1154: }
1155: if (!$namespace) { unless ($namespace=$ENV{'request.course.id'}) { return ''; } }
1156: if (!$domain) { $domain=$ENV{'user.domain'}; }
1157: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1158: if (!$home) { $home=$ENV{'user.home'}; }
1159: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1160:
1161: my %returnhash=();
1162: map {
1163: my ($name,$value)=split(/\=/,$_);
1164: $returnhash{&unescape($name)}=&unescape($value);
1165: } split(/\&/,$answer);
1166: my $version;
1167: for ($version=1;$version<=$returnhash{'version'};$version++) {
1168: map {
1169: $returnhash{$_}=$returnhash{$version.':'.$_};
1170: } split(/\:/,$returnhash{$version.':keys'});
1171: }
1172: return %returnhash;
1173: }
1174:
1175: # ---------------------------------------------------------- Course Description
1176:
1177: sub coursedescription {
1178: my $courseid=shift;
1179: $courseid=~s/^\///;
1180: $courseid=~s/\_/\//g;
1181: my ($cdomain,$cnum)=split(/\//,$courseid);
1182: my $chome=&homeserver($cnum,$cdomain);
1183: if ($chome ne 'no_host') {
1184: my %returnhash=&dump('environment',$cdomain,$cnum);
1185: if (!exists($returnhash{'con_lost'})) {
1186: my $normalid=$cdomain.'_'.$cnum;
1187: my %envhash=();
1188: $returnhash{'home'}= $chome;
1189: $returnhash{'domain'} = $cdomain;
1190: $returnhash{'num'} = $cnum;
1191: while (my ($name,$value) = each %returnhash) {
1192: $envhash{'course.'.$normalid.'.'.$name}=$value;
1193: }
1194: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1195: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1196: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1197: $envhash{'course.'.$normalid.'.last_cache'}=time;
1198: $envhash{'course.'.$normalid.'.home'}=$chome;
1199: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1200: $envhash{'course.'.$normalid.'.num'}=$cnum;
1201: &appenv(%envhash);
1202: return %returnhash;
1203: }
1204: }
1205: return ();
1206: }
1207:
1208: # -------------------------------------------------------- Get user privileges
1209:
1210: sub rolesinit {
1211: my ($domain,$username,$authhost)=@_;
1212: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1213: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1214: my %allroles=();
1215: my %thesepriv=();
1216: my $now=time;
1217: my $userroles="user.login.time=$now\n";
1218: my $thesestr;
1219:
1220: if ($rolesdump ne '') {
1221: map {
1222: if ($_!~/^rolesdef\&/) {
1223: my ($area,$role)=split(/=/,$_);
1224: $area=~s/\_\w\w$//;
1225: my ($trole,$tend,$tstart)=split(/_/,$role);
1226: $userroles.='user.role.'.$trole.'.'.$area.'='.
1227: $tstart.'.'.$tend."\n";
1228: if ($tend!=0) {
1229: if ($tend<$now) {
1230: $trole='';
1231: }
1232: }
1233: if ($tstart!=0) {
1234: if ($tstart>$now) {
1235: $trole='';
1236: }
1237: }
1238: if (($area ne '') && ($trole ne '')) {
1239: my $spec=$trole.'.'.$area;
1240: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1241: if ($trole =~ /^cr\//) {
1242: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1243: my $homsvr=homeserver($rauthor,$rdomain);
1244: if ($hostname{$homsvr} ne '') {
1245: my $roledef=
1246: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1247: $homsvr);
1248: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1249: my ($syspriv,$dompriv,$coursepriv)=
1250: split(/\_/,unescape($roledef));
1251: $allroles{'cm./'}.=':'.$syspriv;
1252: $allroles{$spec.'./'}.=':'.$syspriv;
1253: if ($tdomain ne '') {
1254: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1255: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1256: if ($trest ne '') {
1257: $allroles{'cm.'.$area}.=':'.$coursepriv;
1258: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1259: }
1260: }
1261: }
1262: }
1263: } else {
1264: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1265: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1266: if ($tdomain ne '') {
1267: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1268: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1269: if ($trest ne '') {
1270: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1271: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1272: }
1273: }
1274: }
1275: }
1276: }
1277: } split(/&/,$rolesdump);
1278: my $adv=0;
1279: my $author=0;
1280: map {
1281: %thesepriv=();
1282: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1283: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1284: map {
1285: if ($_ ne '') {
1286: my ($privilege,$restrictions)=split(/&/,$_);
1287: if ($restrictions eq '') {
1288: $thesepriv{$privilege}='F';
1289: } else {
1290: if ($thesepriv{$privilege} ne 'F') {
1291: $thesepriv{$privilege}.=$restrictions;
1292: }
1293: }
1294: }
1295: } split(/:/,$allroles{$_});
1296: $thesestr='';
1297: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
1298: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1299: } keys %allroles;
1300: $userroles.='user.adv='.$adv."\n".
1301: 'user.author='.$author."\n";
1302: $ENV{'user.adv'}=$adv;
1303: }
1304: return $userroles;
1305: }
1306:
1307: # --------------------------------------------------------------- get interface
1308:
1309: sub get {
1310: my ($namespace,$storearr,$udomain,$uname)=@_;
1311: my $items='';
1312: map {
1313: $items.=escape($_).'&';
1314: } @$storearr;
1315: $items=~s/\&$//;
1316: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1317: if (!$uname) { $uname=$ENV{'user.name'}; }
1318: my $uhome=&homeserver($uname,$udomain);
1319:
1320: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1321: my @pairs=split(/\&/,$rep);
1322: my %returnhash=();
1323: my $i=0;
1324: map {
1325: $returnhash{$_}=unescape($pairs[$i]);
1326: $i++;
1327: } @$storearr;
1328: return %returnhash;
1329: }
1330:
1331: # --------------------------------------------------------------- del interface
1332:
1333: sub del {
1334: my ($namespace,$storearr,$udomain,$uname)=@_;
1335: my $items='';
1336: map {
1337: $items.=escape($_).'&';
1338: } @$storearr;
1339: $items=~s/\&$//;
1340: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1341: if (!$uname) { $uname=$ENV{'user.name'}; }
1342: my $uhome=&homeserver($uname,$udomain);
1343:
1344: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1345: }
1346:
1347: # -------------------------------------------------------------- dump interface
1348:
1349: sub dump {
1350: my ($namespace,$udomain,$uname)=@_;
1351: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1352: if (!$uname) { $uname=$ENV{'user.name'}; }
1353: my $uhome=&homeserver($uname,$udomain);
1354: my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
1355: my @pairs=split(/\&/,$rep);
1356: my %returnhash=();
1357: map {
1358: my ($key,$value)=split(/=/,$_);
1359: $returnhash{unescape($key)}=unescape($value);
1360: } @pairs;
1361: return %returnhash;
1362: }
1363:
1364: # --------------------------------------------------------------- put interface
1365:
1366: sub put {
1367: my ($namespace,$storehash,$udomain,$uname)=@_;
1368: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1369: if (!$uname) { $uname=$ENV{'user.name'}; }
1370: my $uhome=&homeserver($uname,$udomain);
1371: my $items='';
1372: map {
1373: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1374: } keys %$storehash;
1375: $items=~s/\&$//;
1376: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1377: }
1378:
1379: # ------------------------------------------------------ critical put interface
1380:
1381: sub cput {
1382: my ($namespace,$storehash,$udomain,$uname)=@_;
1383: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1384: if (!$uname) { $uname=$ENV{'user.name'}; }
1385: my $uhome=&homeserver($uname,$udomain);
1386: my $items='';
1387: map {
1388: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1389: } keys %$storehash;
1390: $items=~s/\&$//;
1391: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1392: }
1393:
1394: # -------------------------------------------------------------- eget interface
1395:
1396: sub eget {
1397: my ($namespace,$storearr,$udomain,$uname)=@_;
1398: my $items='';
1399: map {
1400: $items.=escape($_).'&';
1401: } @$storearr;
1402: $items=~s/\&$//;
1403: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1404: if (!$uname) { $uname=$ENV{'user.name'}; }
1405: my $uhome=&homeserver($uname,$udomain);
1406: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1407: my @pairs=split(/\&/,$rep);
1408: my %returnhash=();
1409: my $i=0;
1410: map {
1411: $returnhash{$_}=unescape($pairs[$i]);
1412: $i++;
1413: } @$storearr;
1414: return %returnhash;
1415: }
1416:
1417: # ------------------------------------------------- Check for a user privilege
1418:
1419: sub allowed {
1420: my ($priv,$uri)=@_;
1421:
1422: my $orguri=$uri;
1423: $uri=&declutter($uri);
1424:
1425: # Free bre access to adm and meta resources
1426:
1427: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1428: return 'F';
1429: }
1430:
1431: # Free bre to public access
1432:
1433: if ($priv eq 'bre') {
1434: if (&metadata($uri,'copyright') eq 'public') { return 'F'; }
1435: }
1436:
1437: my $thisallowed='';
1438: my $statecond=0;
1439: my $courseprivid='';
1440:
1441: # Course
1442:
1443: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1444: $thisallowed.=$1;
1445: }
1446:
1447: # Domain
1448:
1449: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1450: =~/$priv\&([^\:]*)/) {
1451: $thisallowed.=$1;
1452: }
1453:
1454: # Course: uri itself is a course
1455: my $courseuri=$uri;
1456: $courseuri=~s/\_(\d)/\/$1/;
1457: $courseuri=~s/^([^\/])/\/$1/;
1458:
1459: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1460: =~/$priv\&([^\:]*)/) {
1461: $thisallowed.=$1;
1462: }
1463:
1464: # Full access at system, domain or course-wide level? Exit.
1465:
1466: if ($thisallowed=~/F/) {
1467: return 'F';
1468: }
1469:
1470: # If this is generating or modifying users, exit with special codes
1471:
1472: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1473: return $thisallowed;
1474: }
1475: #
1476: # Gathered so far: system, domain and course wide privileges
1477: #
1478: # Course: See if uri or referer is an individual resource that is part of
1479: # the course
1480:
1481: if ($ENV{'request.course.id'}) {
1482: $courseprivid=$ENV{'request.course.id'};
1483: if ($ENV{'request.course.sec'}) {
1484: $courseprivid.='/'.$ENV{'request.course.sec'};
1485: }
1486: $courseprivid=~s/\_/\//;
1487: my $checkreferer=1;
1488: my @uriparts=split(/\//,$uri);
1489: my $filename=$uriparts[$#uriparts];
1490: my $pathname=$uri;
1491: $pathname=~s/\/$filename$//;
1492: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1493: /\&$filename\:([\d\|]+)\&/) {
1494: $statecond=$1;
1495: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1496: =~/$priv\&([^\:]*)/) {
1497: $thisallowed.=$1;
1498: $checkreferer=0;
1499: }
1500: }
1501:
1502: if ($checkreferer) {
1503: my $refuri=$ENV{'httpref.'.$orguri};
1504:
1505: unless ($refuri) {
1506: map {
1507: if ($_=~/^httpref\..*\*/) {
1508: my $pattern=$_;
1509: $pattern=~s/^httpref\.\/res\///;
1510: $pattern=~s/\*/\[\^\/\]\+/g;
1511: $pattern=~s/\//\\\//g;
1512: if ($orguri=~/$pattern/) {
1513: $refuri=$ENV{$_};
1514: }
1515: }
1516: } keys %ENV;
1517: }
1518: if ($refuri) {
1519: $refuri=&declutter($refuri);
1520: my @uriparts=split(/\//,$refuri);
1521: my $filename=$uriparts[$#uriparts];
1522: my $pathname=$refuri;
1523: $pathname=~s/\/$filename$//;
1524: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1525: /\&$filename\:([\d\|]+)\&/) {
1526: my $refstatecond=$1;
1527: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1528: =~/$priv\&([^\:]*)/) {
1529: $thisallowed.=$1;
1530: $uri=$refuri;
1531: $statecond=$refstatecond;
1532: }
1533: }
1534: }
1535: }
1536: }
1537:
1538: #
1539: # Gathered now: all privileges that could apply, and condition number
1540: #
1541: #
1542: # Full or no access?
1543: #
1544:
1545: if ($thisallowed=~/F/) {
1546: return 'F';
1547: }
1548:
1549: unless ($thisallowed) {
1550: return '';
1551: }
1552:
1553: # Restrictions exist, deal with them
1554: #
1555: # C:according to course preferences
1556: # R:according to resource settings
1557: # L:unless locked
1558: # X:according to user session state
1559: #
1560:
1561: # Possibly locked functionality, check all courses
1562: # Locks might take effect only after 10 minutes cache expiration for other
1563: # courses, and 2 minutes for current course
1564:
1565: my $envkey;
1566: if ($thisallowed=~/L/) {
1567: foreach $envkey (keys %ENV) {
1568: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1569: my $courseid=$2;
1570: my $roleid=$1.'.'.$2;
1571: $courseid=~s/^\///;
1572: my $expiretime=600;
1573: if ($ENV{'request.role'} eq $roleid) {
1574: $expiretime=120;
1575: }
1576: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1577: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1578: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1579: &coursedescription($courseid);
1580: }
1581: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1582: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1583: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1584: &log($ENV{'user.domain'},$ENV{'user.name'},
1585: $ENV{'user.host'},
1586: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1587: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1588: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1589: return '';
1590: }
1591: }
1592: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1593: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1594: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1595: &log($ENV{'user.domain'},$ENV{'user.name'},
1596: $ENV{'user.host'},
1597: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1598: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1599: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1600: return '';
1601: }
1602: }
1603: }
1604: }
1605: }
1606:
1607: #
1608: # Rest of the restrictions depend on selected course
1609: #
1610:
1611: unless ($ENV{'request.course.id'}) {
1612: return '1';
1613: }
1614:
1615: #
1616: # Now user is definitely in a course
1617: #
1618:
1619:
1620: # Course preferences
1621:
1622: if ($thisallowed=~/C/) {
1623: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1624: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1625: =~/\,$rolecode\,/) {
1626: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1627: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1628: $ENV{'request.course.id'});
1629: return '';
1630: }
1631: }
1632:
1633: # Resource preferences
1634:
1635: if ($thisallowed=~/R/) {
1636: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1637: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1638: if (-e $filename) {
1639: my @content;
1640: {
1641: my $fh=Apache::File->new($filename);
1642: @content=<$fh>;
1643: }
1644: if (join('',@content)=~
1645: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1646: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1647: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1648: return '';
1649:
1650: }
1651: }
1652: }
1653:
1654: # Restricted by state?
1655:
1656: if ($thisallowed=~/X/) {
1657: if (&condval($statecond)) {
1658: return '2';
1659: } else {
1660: return '';
1661: }
1662: }
1663:
1664: return 'F';
1665: }
1666:
1667: # ----------------------------------------------------------------- Define Role
1668:
1669: sub definerole {
1670: if (allowed('mcr','/')) {
1671: my ($rolename,$sysrole,$domrole,$courole)=@_;
1672: map {
1673: my ($crole,$cqual)=split(/\&/,$_);
1674: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1675: if ($pr{'cr:s'}=~/$crole\&/) {
1676: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1677: return "refused:s:$crole&$cqual";
1678: }
1679: }
1680: } split('/',$sysrole);
1681: map {
1682: my ($crole,$cqual)=split(/\&/,$_);
1683: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1684: if ($pr{'cr:d'}=~/$crole\&/) {
1685: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1686: return "refused:d:$crole&$cqual";
1687: }
1688: }
1689: } split('/',$domrole);
1690: map {
1691: my ($crole,$cqual)=split(/\&/,$_);
1692: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1693: if ($pr{'cr:c'}=~/$crole\&/) {
1694: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1695: return "refused:c:$crole&$cqual";
1696: }
1697: }
1698: } split('/',$courole);
1699: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1700: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1701: "rolesdef_$rolename=".
1702: escape($sysrole.'_'.$domrole.'_'.$courole);
1703: return reply($command,$ENV{'user.home'});
1704: } else {
1705: return 'refused';
1706: }
1707: }
1708:
1709: # ---------------- Make a metadata query against the network of library servers
1710:
1711: sub metadata_query {
1712: my ($query,$custom,$customshow)=@_;
1713: my %rhash;
1714: for my $server (keys %libserv) {
1715: unless ($custom or $customshow) {
1716: my $reply=&reply("querysend:".&escape($query),$server);
1717: $rhash{$server}=$reply;
1718: }
1719: else {
1720: my $reply=&reply("querysend:".&escape($query).':'.
1721: &escape($custom).':'.&escape($customshow),
1722: $server);
1723: $rhash{$server}=$reply;
1724: }
1725: }
1726: return \%rhash;
1727: }
1728:
1729: # ------------------------------------------------------------------ Plain Text
1730:
1731: sub plaintext {
1732: my $short=shift;
1733: return $prp{$short};
1734: }
1735:
1736: # ------------------------------------------------------------------ Plain Text
1737:
1738: sub fileembstyle {
1739: my $ending=lc(shift);
1740: return $fe{$ending};
1741: }
1742:
1743: # ------------------------------------------------------------ Description Text
1744:
1745: sub filedescription {
1746: my $ending=lc(shift);
1747: return $fd{$ending};
1748: }
1749:
1750: # ----------------------------------------------------------------- Assign Role
1751:
1752: sub assignrole {
1753: my ($udom,$uname,$url,$role,$end,$start)=@_;
1754: my $mrole;
1755: if ($role =~ /^cr\//) {
1756: unless (&allowed('ccr',$url)) {
1757: &logthis('Refused custom assignrole: '.
1758: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1759: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1760: return 'refused';
1761: }
1762: $mrole='cr';
1763: } else {
1764: my $cwosec=$url;
1765: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1766: unless (&allowed('c'.$role,$cwosec)) {
1767: &logthis('Refused assignrole: '.
1768: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1769: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1770: return 'refused';
1771: }
1772: $mrole=$role;
1773: }
1774: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1775: "$udom:$uname:$url".'_'."$mrole=$role";
1776: if ($end) { $command.='_'.$end; }
1777: if ($start) {
1778: if ($end) {
1779: $command.='_'.$start;
1780: } else {
1781: $command.='_0_'.$start;
1782: }
1783: }
1784: return &reply($command,&homeserver($uname,$udom));
1785: }
1786:
1787: # -------------------------------------------------- Modify user authentication
1788: sub modifyuserauth {
1789: my ($udom,$uname,$umode,$upass)=@_;
1790: my $uhome=&homeserver($uname,$udom);
1791: &logthis('Call to modify user authentication'.$udom.', '.$uname.', '.
1792: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1793: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
1794: &escape($upass),$uhome);
1795: unless ($reply eq 'ok') {
1796: return 'error: '.$reply;
1797: }
1798: return 'ok';
1799: }
1800:
1801: # --------------------------------------------------------------- Modify a user
1802:
1803:
1804: sub modifyuser {
1805: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1806: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1807: $umode.', '.$first.', '.$middle.', '.
1808: $last.', '.$gene.' by '.
1809: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1810: my $uhome=&homeserver($uname,$udom);
1811: # ----------------------------------------------------------------- Create User
1812: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1813: my $unhome='';
1814: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1815: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1816: } else {
1817: my $tryserver;
1818: my $loadm=10000000;
1819: foreach $tryserver (keys %libserv) {
1820: if ($hostdom{$tryserver} eq $udom) {
1821: my $answer=reply('load',$tryserver);
1822: if (($answer=~/\d+/) && ($answer<$loadm)) {
1823: $loadm=$answer;
1824: $unhome=$tryserver;
1825: }
1826: }
1827: }
1828: }
1829: if (($unhome eq '') || ($unhome eq 'no_host')) {
1830: return 'error: find home';
1831: }
1832: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1833: &escape($upass),$unhome);
1834: unless ($reply eq 'ok') {
1835: return 'error: '.$reply;
1836: }
1837: $uhome=&homeserver($uname,$udom);
1838: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1839: return 'error: verify home';
1840: }
1841: }
1842: # ---------------------------------------------------------------------- Add ID
1843: if ($uid) {
1844: $uid=~tr/A-Z/a-z/;
1845: my %uidhash=&idrget($udom,$uname);
1846: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1847: unless ($uid eq $uidhash{$uname}) {
1848: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1849: }
1850: } else {
1851: &idput($udom,($uname => $uid));
1852: }
1853: }
1854: # -------------------------------------------------------------- Add names, etc
1855: my %names=&get('environment',
1856: ['firstname','middlename','lastname','generation'],
1857: $udom,$uname);
1858: if ($first) { $names{'firstname'} = $first; }
1859: if ($middle) { $names{'middlename'} = $middle; }
1860: if ($last) { $names{'lastname'} = $last; }
1861: if ($gene) { $names{'generation'} = $gene; }
1862: my $reply = &put('environment', \%names, $udom,$uname);
1863: if ($reply ne 'ok') { return 'error: '.$reply; }
1864: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1865: $umode.', '.$first.', '.$middle.', '.
1866: $last.', '.$gene.' by '.
1867: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1868: return 'ok';
1869: }
1870:
1871: # -------------------------------------------------------------- Modify student
1872:
1873: sub modifystudent {
1874: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1875: $end,$start)=@_;
1876: my $cid='';
1877: unless ($cid=$ENV{'request.course.id'}) {
1878: return 'not_in_class';
1879: }
1880: # --------------------------------------------------------------- Make the user
1881: my $reply=&modifyuser
1882: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1883: unless ($reply eq 'ok') { return $reply; }
1884: my $uhome=&homeserver($uname,$udom);
1885: if (($uhome eq '') || ($uhome eq 'no_host')) {
1886: return 'error: no such user';
1887: }
1888: # -------------------------------------------------- Add student to course list
1889: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1890: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1891: &escape($uname.':'.$udom).'='.
1892: &escape($end.':'.$start),
1893: $ENV{'course.'.$cid.'.home'});
1894: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1895: return 'error: '.$reply;
1896: }
1897: # ---------------------------------------------------- Add student role to user
1898: my $uurl='/'.$cid;
1899: $uurl=~s/\_/\//g;
1900: if ($usec) {
1901: $uurl.='/'.$usec;
1902: }
1903: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1904: }
1905:
1906: # ------------------------------------------------- Write to course preferences
1907:
1908: sub writecoursepref {
1909: my ($courseid,%prefs)=@_;
1910: $courseid=~s/^\///;
1911: $courseid=~s/\_/\//g;
1912: my ($cdomain,$cnum)=split(/\//,$courseid);
1913: my $chome=homeserver($cnum,$cdomain);
1914: if (($chome eq '') || ($chome eq 'no_host')) {
1915: return 'error: no such course';
1916: }
1917: my $cstring='';
1918: map {
1919: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1920: } keys %prefs;
1921: $cstring=~s/\&$//;
1922: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1923: }
1924:
1925: # ---------------------------------------------------------- Make/modify course
1926:
1927: sub createcourse {
1928: my ($udom,$description,$url)=@_;
1929: $url=&declutter($url);
1930: my $cid='';
1931: unless (&allowed('ccc',$ENV{'user.domain'})) {
1932: return 'refused';
1933: }
1934: unless ($udom eq $ENV{'user.domain'}) {
1935: return 'refused';
1936: }
1937: # ------------------------------------------------------------------- Create ID
1938: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1939: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1940: # ----------------------------------------------- Make sure that does not exist
1941: my $uhome=&homeserver($uname,$udom);
1942: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1943: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1944: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1945: $uhome=&homeserver($uname,$udom);
1946: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1947: return 'error: unable to generate unique course-ID';
1948: }
1949: }
1950: # ------------------------------------------------------------- Make the course
1951: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1952: $ENV{'user.home'});
1953: unless ($reply eq 'ok') { return 'error: '.$reply; }
1954: $uhome=&homeserver($uname,$udom);
1955: if (($uhome eq '') || ($uhome eq 'no_host')) {
1956: return 'error: no such course';
1957: }
1958: &writecoursepref($udom.'_'.$uname,
1959: ('description' => $description,
1960: 'url' => $url));
1961: return '/'.$udom.'/'.$uname;
1962: }
1963:
1964: # ---------------------------------------------------------- Assign Custom Role
1965:
1966: sub assigncustomrole {
1967: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1968: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1969: $end,$start);
1970: }
1971:
1972: # ----------------------------------------------------------------- Revoke Role
1973:
1974: sub revokerole {
1975: my ($udom,$uname,$url,$role)=@_;
1976: my $now=time;
1977: return &assignrole($udom,$uname,$url,$role,$now);
1978: }
1979:
1980: # ---------------------------------------------------------- Revoke Custom Role
1981:
1982: sub revokecustomrole {
1983: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1984: my $now=time;
1985: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1986: }
1987:
1988: # ------------------------------------------------------------ Directory lister
1989:
1990: sub dirlist {
1991: my $uri=shift;
1992: $uri=~s/^\///;
1993: $uri=~s/\/$//;
1994: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1995: if ($udom) {
1996: if ($uname) {
1997: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1998: homeserver($uname,$udom));
1999: return split(/:/,$listing);
2000: } else {
2001: my $tryserver;
2002: my %allusers=();
2003: foreach $tryserver (keys %libserv) {
2004: if ($hostdom{$tryserver} eq $udom) {
2005: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
2006: $tryserver);
2007: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2008: && ($listing ne 'con_lost')) {
2009: map {
2010: my ($entry,@stat)=split(/&/,$_);
2011: $allusers{$entry}=1;
2012: } split(/:/,$listing);
2013: }
2014: }
2015: }
2016: my $alluserstr='';
2017: map {
2018: $alluserstr.=$_.'&user:';
2019: } sort keys %allusers;
2020: $alluserstr=~s/:$//;
2021: return split(/:/,$alluserstr);
2022: }
2023: } else {
2024: my $tryserver;
2025: my %alldom=();
2026: foreach $tryserver (keys %libserv) {
2027: $alldom{$hostdom{$tryserver}}=1;
2028: }
2029: my $alldomstr='';
2030: map {
2031: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2032: } sort keys %alldom;
2033: $alldomstr=~s/:$//;
2034: return split(/:/,$alldomstr);
2035: }
2036: }
2037:
2038: # -------------------------------------------------------- Value of a Condition
2039:
2040: sub directcondval {
2041: my $number=shift;
2042: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2043: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2044: } else {
2045: return 2;
2046: }
2047: }
2048:
2049: sub condval {
2050: my $condidx=shift;
2051: my $result=0;
2052: my $allpathcond='';
2053: map {
2054: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2055: $allpathcond.=
2056: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2057: }
2058: } split(/\|/,$condidx);
2059: $allpathcond=~s/\|$//;
2060: if ($ENV{'request.course.id'}) {
2061: if ($allpathcond) {
2062: my $operand='|';
2063: my @stack;
2064: map {
2065: if ($_ eq '(') {
2066: push @stack,($operand,$result)
2067: } elsif ($_ eq ')') {
2068: my $before=pop @stack;
2069: if (pop @stack eq '&') {
2070: $result=$result>$before?$before:$result;
2071: } else {
2072: $result=$result>$before?$result:$before;
2073: }
2074: } elsif (($_ eq '&') || ($_ eq '|')) {
2075: $operand=$_;
2076: } else {
2077: my $new=directcondval($_);
2078: if ($operand eq '&') {
2079: $result=$result>$new?$new:$result;
2080: } else {
2081: $result=$result>$new?$result:$new;
2082: }
2083: }
2084: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
2085: }
2086: }
2087: return $result;
2088: }
2089:
2090: # --------------------------------------------------------- Value of a Variable
2091:
2092: sub EXT {
2093: my ($varname,$symbparm)=@_;
2094: unless ($varname) { return ''; }
2095: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2096: my $rest;
2097: if ($therest[0]) {
2098: $rest=join('.',@therest);
2099: } else {
2100: $rest='';
2101: }
2102: my $qualifierrest=$qualifier;
2103: if ($rest) { $qualifierrest.='.'.$rest; }
2104: my $spacequalifierrest=$space;
2105: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2106: if ($realm eq 'user') {
2107: # --------------------------------------------------------------- user.resource
2108: if ($space eq 'resource') {
2109: my %restored=&restore();
2110: return $restored{$qualifierrest};
2111: # ----------------------------------------------------------------- user.access
2112: } elsif ($space eq 'access') {
2113: return &allowed($qualifier,$rest);
2114: # ------------------------------------------ user.preferences, user.environment
2115: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2116: return $ENV{join('.',('environment',$qualifierrest))};
2117: # ----------------------------------------------------------------- user.course
2118: } elsif ($space eq 'course') {
2119: return $ENV{join('.',('request.course',$qualifier))};
2120: # ------------------------------------------------------------------- user.role
2121: } elsif ($space eq 'role') {
2122: my ($role,$where)=split(/\./,$ENV{'request.role'});
2123: if ($qualifier eq 'value') {
2124: return $role;
2125: } elsif ($qualifier eq 'extent') {
2126: return $where;
2127: }
2128: # ----------------------------------------------------------------- user.domain
2129: } elsif ($space eq 'domain') {
2130: return $ENV{'user.domain'};
2131: # ------------------------------------------------------------------- user.name
2132: } elsif ($space eq 'name') {
2133: return $ENV{'user.name'};
2134: # ---------------------------------------------------- Any other user namespace
2135: } else {
2136: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2137: my %reply=&get($space,[$item]);
2138: return $reply{$item};
2139: }
2140: } elsif ($realm eq 'request') {
2141: # ------------------------------------------------------------- request.browser
2142: if ($space eq 'browser') {
2143: return $ENV{'browser.'.$qualifier};
2144: # ------------------------------------------------------------ request.filename
2145: } else {
2146: return $ENV{'request.'.$spacequalifierrest};
2147: }
2148: } elsif ($realm eq 'course') {
2149: # ---------------------------------------------------------- course.description
2150: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
2151: $spacequalifierrest};
2152: } elsif ($realm eq 'resource') {
2153: if ($ENV{'request.course.id'}) {
2154:
2155: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2156:
2157:
2158: # ----------------------------------------------------- Cascading lookup scheme
2159: my $symbp;
2160: if ($symbparm) {
2161: $symbp=$symbparm;
2162: } else {
2163: $symbp=&symbread();
2164: }
2165: my $mapp=(split(/\_\_\_/,$symbp))[0];
2166:
2167: my $symbparm=$symbp.'.'.$spacequalifierrest;
2168: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2169:
2170: my $seclevel=
2171: $ENV{'request.course.id'}.'.['.
2172: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
2173: my $seclevelr=
2174: $ENV{'request.course.id'}.'.['.
2175: $ENV{'request.course.sec'}.'].'.$symbparm;
2176: my $seclevelm=
2177: $ENV{'request.course.id'}.'.['.
2178: $ENV{'request.course.sec'}.'].'.$mapparm;
2179:
2180: my $courselevel=
2181: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
2182: my $courselevelr=
2183: $ENV{'request.course.id'}.'.'.$symbparm;
2184: my $courselevelm=
2185: $ENV{'request.course.id'}.'.'.$mapparm;
2186:
2187: # ----------------------------------------------------------- first, check user
2188: my %resourcedata=get('resourcedata',
2189: [$courselevelr,$courselevelm,$courselevel]);
2190: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2191: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2192:
2193: if ($resourcedata{$courselevelr}) {
2194: return $resourcedata{$courselevelr}; }
2195: if ($resourcedata{$courselevelm}) {
2196: return $resourcedata{$courselevelm}; }
2197: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
2198:
2199: } else {
2200: if ($resourcedata{$courselevelr}!~/No such file/) {
2201: &logthis("<font color=blue>WARNING:".
2202: " Trying to get resource data for ".$ENV{'user.name'}." at "
2203: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
2204: "</font>");
2205: }
2206: }
2207:
2208: # -------------------------------------------------------- second, check course
2209:
2210: my $reply=&reply('get:'.
2211: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
2212: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2213: ':resourcedata:'.
2214: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
2215: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
2216: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
2217: if ($reply!~/^error\:/) {
2218: map {
2219: if ($_) { return &unescape($_); }
2220: } split(/\&/,$reply);
2221: }
2222: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
2223: &logthis("<font color=blue>WARNING:".
2224: " Getting ".$reply." asking for ".$varname." for ".
2225: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2226: ' at '.
2227: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
2228: ' from '.
2229: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
2230: "</font>");
2231: }
2232: # ------------------------------------------------------ third, check map parms
2233: my %parmhash=();
2234: my $thisparm='';
2235: if (tie(%parmhash,'GDBM_File',
2236: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
2237: $thisparm=$parmhash{$symbparm};
2238: untie(%parmhash);
2239: }
2240: if ($thisparm) { return $thisparm; }
2241: }
2242:
2243: # --------------------------------------------- last, look in resource metadata
2244:
2245: $spacequalifierrest=~s/\./\_/;
2246: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2247: if ($metadata) { return $metadata; }
2248: $metadata=&metadata($ENV{'request.filename'},
2249: 'parameter_'.$spacequalifierrest);
2250: if ($metadata) { return $metadata; }
2251:
2252: # ------------------------------------------------------------------ Cascade up
2253:
2254: unless ($space eq '0') {
2255: my ($part,$id)=split(/\_/,$space);
2256: if ($id) {
2257: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2258: $symbparm);
2259: if ($partgeneral) { return $partgeneral; }
2260: } else {
2261: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2262: $symbparm);
2263: if ($resourcegeneral) { return $resourcegeneral; }
2264: }
2265: }
2266:
2267: # ---------------------------------------------------- Any other user namespace
2268: } elsif ($realm eq 'environment') {
2269: # ----------------------------------------------------------------- environment
2270: return $ENV{'environment.'.$spacequalifierrest};
2271: } elsif ($realm eq 'system') {
2272: # ----------------------------------------------------------------- system.time
2273: if ($space eq 'time') {
2274: return time;
2275: }
2276: }
2277: return '';
2278: }
2279:
2280: # ---------------------------------------------------------------- Get metadata
2281:
2282: sub metadata {
2283: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2284:
2285: $uri=&declutter($uri);
2286: my $filename=$uri;
2287: $uri=~s/\.meta$//;
2288: #
2289: # Is the metadata already cached?
2290: # Look at timestamp of caching
2291: # Everything is cached by the main uri, libraries are never directly cached
2292: #
2293: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2294: #
2295: # Is this a recursive call for a library?
2296: #
2297: if ($liburi) {
2298: $liburi=&declutter($liburi);
2299: $filename=$liburi;
2300: }
2301: my %metathesekeys=();
2302: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2303: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2304: my $parser=HTML::TokeParser->new(\$metastring);
2305: my $token;
2306: undef %metathesekeys;
2307: while ($token=$parser->get_token) {
2308: if ($token->[0] eq 'S') {
2309: if (defined($token->[2]->{'package'})) {
2310: #
2311: # This is a package - get package info
2312: #
2313: my $package=$token->[2]->{'package'};
2314: my $keyroot='';
2315: if ($prefix) {
2316: $keyroot.='_'.$prefix;
2317: } else {
2318: if (defined($token->[2]->{'part'})) {
2319: $keyroot.='_'.$token->[2]->{'part'};
2320: }
2321: }
2322: if (defined($token->[2]->{'id'})) {
2323: $keyroot.='_'.$token->[2]->{'id'};
2324: }
2325: if ($metacache{$uri.':packages'}) {
2326: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2327: } else {
2328: $metacache{$uri.':packages'}=$package.$keyroot;
2329: }
2330: map {
2331: if ($_=~/^$package\&/) {
2332: my ($pack,$name,$subp)=split(/\&/,$_);
2333: my $value=$packagetab{$_};
2334: my $part=$keyroot;
2335: $part=~s/^\_//;
2336: if ($subp eq 'display') {
2337: $value.=' [Part: '.$part.']';
2338: }
2339: my $unikey='parameter'.$keyroot.'_'.$name;
2340: $metathesekeys{$unikey}=1;
2341: $metacache{$uri.':'.$unikey.'.part'}=$part;
2342: unless
2343: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2344: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2345: }
2346: }
2347: } keys %packagetab;
2348: } else {
2349: #
2350: # This is not a package - some other kind of start tag
2351: #
2352: my $entry=$token->[1];
2353: my $unikey;
2354: if ($entry eq 'import') {
2355: $unikey='';
2356: } else {
2357: $unikey=$entry;
2358: }
2359: if ($prefix) {
2360: $unikey.=$prefix;
2361: } else {
2362: if (defined($token->[2]->{'part'})) {
2363: $unikey.='_'.$token->[2]->{'part'};
2364: }
2365: }
2366: if (defined($token->[2]->{'id'})) {
2367: $unikey.='_'.$token->[2]->{'id'};
2368: }
2369:
2370: if ($entry eq 'import') {
2371: #
2372: # Importing a library here
2373: #
2374: if (defined($depthcount)) { $depthcount++; } else
2375: { $depthcount=0; }
2376: if ($depthcount<20) {
2377: map {
2378: $metathesekeys{$_}=1;
2379: } split(/\,/,&metadata($uri,'keys',
2380: $parser->get_text('/import'),$unikey,
2381: $depthcount));
2382: }
2383: } else {
2384:
2385: if (defined($token->[2]->{'name'})) {
2386: $unikey.='_'.$token->[2]->{'name'};
2387: }
2388: $metathesekeys{$unikey}=1;
2389: map {
2390: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2391: } @{$token->[3]};
2392: unless (
2393: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
2394: ) { $metacache{$uri.':'.$unikey}=
2395: $metacache{$uri.':'.$unikey.'.default'};
2396: }
2397: # end of not-a-package not-a-library import
2398: }
2399: # end of not-a-package start tag
2400: }
2401: # the next is the end of "start tag"
2402: }
2403: }
2404: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2405: $metacache{$uri.':cachedtimestamp'}=time;
2406: # this is the end of "was not already recently cached
2407: }
2408: return $metacache{$uri.':'.$what};
2409: }
2410:
2411: # ------------------------------------------------- Update symbolic store links
2412:
2413: sub symblist {
2414: my ($mapname,%newhash)=@_;
2415: $mapname=declutter($mapname);
2416: my %hash;
2417: if (($ENV{'request.course.fn'}) && (%newhash)) {
2418: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2419: &GDBM_WRCREAT,0640)) {
2420: map {
2421: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2422: } keys %newhash;
2423: if (untie(%hash)) {
2424: return 'ok';
2425: }
2426: }
2427: }
2428: return 'error';
2429: }
2430:
2431: # ------------------------------------------------------ Return symb list entry
2432:
2433: sub symbread {
2434: my $thisfn=shift;
2435: unless ($thisfn) {
2436: if ($ENV{'request.symb'}) { return $ENV{'request.symb'}; }
2437: $thisfn=$ENV{'request.filename'};
2438: }
2439: $thisfn=declutter($thisfn);
2440: my %hash;
2441: my %bighash;
2442: my $syval='';
2443: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2444: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2445: &GDBM_READER,0640)) {
2446: $syval=$hash{$thisfn};
2447: untie(%hash);
2448: }
2449: # ---------------------------------------------------------- There was an entry
2450: if ($syval) {
2451: unless ($syval=~/\_\d+$/) {
2452: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2453: &appenv('request.ambiguous' => $thisfn);
2454: return '';
2455: }
2456: $syval.=$1;
2457: }
2458: } else {
2459: # ------------------------------------------------------- Was not in symb table
2460: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2461: &GDBM_READER,0640)) {
2462: # ---------------------------------------------- Get ID(s) for current resource
2463: my $ids=$bighash{'ids_/res/'.$thisfn};
2464: unless ($ids) {
2465: $ids=$bighash{'ids_/'.$thisfn};
2466: }
2467: if ($ids) {
2468: # ------------------------------------------------------------------- Has ID(s)
2469: my @possibilities=split(/\,/,$ids);
2470: if ($#possibilities==0) {
2471: # ----------------------------------------------- There is only one possibility
2472: my ($mapid,$resid)=split(/\./,$ids);
2473: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2474: } else {
2475: # ------------------------------------------ There is more than one possibility
2476: my $realpossible=0;
2477: map {
2478: my $file=$bighash{'src_'.$_};
2479: if (&allowed('bre',$file)) {
2480: my ($mapid,$resid)=split(/\./,$_);
2481: if ($bighash{'map_type_'.$mapid} ne 'page') {
2482: $realpossible++;
2483: $syval=declutter($bighash{'map_id_'.$mapid}).
2484: '___'.$resid;
2485: }
2486: }
2487: } @possibilities;
2488: if ($realpossible!=1) { $syval=''; }
2489: }
2490: }
2491: untie(%bighash)
2492: }
2493: }
2494: if ($syval) {
2495: return $syval.'___'.$thisfn;
2496: }
2497: }
2498: &appenv('request.ambiguous' => $thisfn);
2499: return '';
2500: }
2501:
2502: # ---------------------------------------------------------- Return random seed
2503:
2504: sub numval {
2505: my $txt=shift;
2506: $txt=~tr/A-J/0-9/;
2507: $txt=~tr/a-j/0-9/;
2508: $txt=~tr/K-T/0-9/;
2509: $txt=~tr/k-t/0-9/;
2510: $txt=~tr/U-Z/0-5/;
2511: $txt=~tr/u-z/0-5/;
2512: $txt=~s/\D//g;
2513: return int($txt);
2514: }
2515:
2516: sub rndseed {
2517: my ($symb,$courseid,$domain,$username)=@_;
2518: if (!$symb) {
2519: unless ($symb=&symbread()) { return time; }
2520: }
2521: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2522: if (!$domain) {$domain=$ENV{'user.domain'};}
2523: if (!$username) {$username=$ENV{'user.name'};}
2524: {
2525: use integer;
2526: my $symbchck=unpack("%32C*",$symb) << 27;
2527: my $symbseed=numval($symb) << 22;
2528: my $namechck=unpack("%32C*",$username) << 17;
2529: my $nameseed=numval($username) << 12;
2530: my $domainseed=unpack("%32C*",$domain) << 7;
2531: my $courseseed=unpack("%32C*",$courseid);
2532: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2533: #uncommenting these lines can break things!
2534: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2535: #&Apache::lonxml::debug("rndseed :$num:$symb");
2536: return $num;
2537: }
2538: }
2539:
2540: sub ireceipt {
2541: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2542: my $cuname=unpack("%32C*",$funame);
2543: my $cudom=unpack("%32C*",$fudom);
2544: my $cucourseid=unpack("%32C*",$fucourseid);
2545: my $cusymb=unpack("%32C*",$fusymb);
2546: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2547: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2548: ($cunique%$cuname+
2549: $cunique%$cudom+
2550: $cusymb%$cuname+
2551: $cusymb%$cudom+
2552: $cucourseid%$cuname+
2553: $cucourseid%$cudom);
2554: }
2555:
2556: sub receipt {
2557: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2558: $ENV{'request.course.id'},&symbread());
2559: }
2560:
2561: # ------------------------------------------------------------ Serves up a file
2562: # returns either the contents of the file or a -1
2563: sub getfile {
2564: my $file=shift;
2565: &repcopy($file);
2566: if (! -e $file ) { return -1; };
2567: my $fh=Apache::File->new($file);
2568: my $a='';
2569: while (<$fh>) { $a .=$_; }
2570: return $a
2571: }
2572:
2573: sub filelocation {
2574: my ($dir,$file) = @_;
2575: my $location;
2576: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2577: if ($file=~m:^/~:) { # is a contruction space reference
2578: $location = $file;
2579: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2580: } else {
2581: $file=~s/^$perlvar{'lonDocRoot'}//;
2582: $file=~s:^/*res::;
2583: if ( !( $file =~ m:^/:) ) {
2584: $location = $dir. '/'.$file;
2585: } else {
2586: $location = '/home/httpd/html/res'.$file;
2587: }
2588: }
2589: $location=~s://+:/:g; # remove duplicate /
2590: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2591: return $location;
2592: }
2593:
2594: sub hreflocation {
2595: my ($dir,$file)=@_;
2596: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2597: my $finalpath=filelocation($dir,$file);
2598: $finalpath=~s/^\/home\/httpd\/html//;
2599: return $finalpath;
2600: } else {
2601: return $file;
2602: }
2603: }
2604:
2605: # ------------------------------------------------------------- Declutters URLs
2606:
2607: sub declutter {
2608: my $thisfn=shift;
2609: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2610: $thisfn=~s/^\///;
2611: $thisfn=~s/^res\///;
2612: return $thisfn;
2613: }
2614:
2615: # -------------------------------------------------------- Escape Special Chars
2616:
2617: sub escape {
2618: my $str=shift;
2619: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2620: return $str;
2621: }
2622:
2623: # ----------------------------------------------------- Un-Escape Special Chars
2624:
2625: sub unescape {
2626: my $str=shift;
2627: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2628: return $str;
2629: }
2630:
2631: # ================================================================ Main Program
2632:
2633: sub goodbye {
2634: &flushcourselogs();
2635: &logthis("Shutting down");
2636: }
2637:
2638: BEGIN {
2639: # ------------------------------------------------------------ Read access.conf
2640: {
2641: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2642:
2643: while (my $configline=<$config>) {
2644: if ($configline =~ /PerlSetVar/) {
2645: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2646: chomp($varvalue);
2647: $perlvar{$varname}=$varvalue;
2648: }
2649: }
2650: }
2651:
2652: # ------------------------------------------------------------- Read hosts file
2653: {
2654: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2655:
2656: while (my $configline=<$config>) {
2657: chomp($configline);
2658: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2659: $hostname{$id}=$name;
2660: $hostdom{$id}=$domain;
2661: $hostip{$id}=$ip;
2662: if ($role eq 'library') { $libserv{$id}=$name; }
2663: }
2664: }
2665:
2666: # ------------------------------------------------------ Read spare server file
2667: {
2668: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2669:
2670: while (my $configline=<$config>) {
2671: chomp($configline);
2672: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2673: $spareid{$configline}=1;
2674: }
2675: }
2676: }
2677: # ------------------------------------------------------------ Read permissions
2678: {
2679: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2680:
2681: while (my $configline=<$config>) {
2682: chomp($configline);
2683: if ($configline) {
2684: my ($role,$perm)=split(/ /,$configline);
2685: if ($perm ne '') { $pr{$role}=$perm; }
2686: }
2687: }
2688: }
2689:
2690: # -------------------------------------------- Read plain texts for permissions
2691: {
2692: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2693:
2694: while (my $configline=<$config>) {
2695: chomp($configline);
2696: if ($configline) {
2697: my ($short,$plain)=split(/:/,$configline);
2698: if ($plain ne '') { $prp{$short}=$plain; }
2699: }
2700: }
2701: }
2702:
2703: # ---------------------------------------------------------- Read package table
2704: {
2705: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2706:
2707: while (my $configline=<$config>) {
2708: chomp($configline);
2709: my ($short,$plain)=split(/:/,$configline);
2710: my ($pack,$name)=split(/\&/,$short);
2711: if ($plain ne '') {
2712: $packagetab{$pack.'&'.$name.'&name'}=$name;
2713: $packagetab{$short}=$plain;
2714: }
2715: }
2716: }
2717:
2718: # ------------------------------------------------------------- Read file types
2719: {
2720: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2721:
2722: while (my $configline=<$config>) {
2723: next if ($configline =~ /^\#/);
2724: chomp($configline);
2725: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2726: if ($descr[0] ne '') {
2727: $fe{$ending}=lc($emb);
2728: $fd{$ending}=join(' ',@descr);
2729: }
2730: }
2731: }
2732:
2733: %metacache=();
2734:
2735: $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
2736:
2737: &logtouch();
2738: &logthis('<font color=yellow>INFO: Read configuration</font>');
2739: }
2740:
2741: 1;
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