1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # $Id: lonnet.pm,v 1.188 2001/12/07 20:17:44 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: # 12/6,12/7 Gerd Kortemeyer
66: #
67: # $Id: lonnet.pm,v 1.188 2001/12/07 20:17:44 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
176: %libserv %pr %prp %fe %fd %metacache %packagetab
177: %courselogs %accesshash $processmarker $dumpcount
178: %coursedombuf %coursehombuf);
179: use IO::Socket;
180: use GDBM_File;
181: use Apache::Constants qw(:common :http);
182: use HTML::TokeParser;
183: use Fcntl qw(:flock);
184:
185: # --------------------------------------------------------------------- Logging
186:
187: sub logtouch {
188: my $execdir=$perlvar{'lonDaemons'};
189: unless (-e "$execdir/logs/lonnet.log") {
190: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
191: close $fh;
192: }
193: my ($wwwuid,$wwwgid)=(getpwnam('www'))[2,3];
194: chown($wwwuid,$wwwgid,$execdir.'/logs/lonnet.log');
195: }
196:
197: sub logthis {
198: my $message=shift;
199: my $execdir=$perlvar{'lonDaemons'};
200: my $now=time;
201: my $local=localtime($now);
202: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
203: print $fh "$local ($$): $message\n";
204: return 1;
205: }
206:
207: sub logperm {
208: my $message=shift;
209: my $execdir=$perlvar{'lonDaemons'};
210: my $now=time;
211: my $local=localtime($now);
212: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
213: print $fh "$now:$message:$local\n";
214: return 1;
215: }
216:
217: # -------------------------------------------------- Non-critical communication
218: sub subreply {
219: my ($cmd,$server)=@_;
220: my $peerfile="$perlvar{'lonSockDir'}/$server";
221: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
222: Type => SOCK_STREAM,
223: Timeout => 10)
224: or return "con_lost";
225: print $client "$cmd\n";
226: my $answer=<$client>;
227: if (!$answer) { $answer="con_lost"; }
228: chomp($answer);
229: return $answer;
230: }
231:
232: sub reply {
233: my ($cmd,$server)=@_;
234: my $answer=subreply($cmd,$server);
235: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
236: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
237: &logthis("<font color=blue>WARNING:".
238: " $cmd to $server returned $answer</font>");
239: }
240: return $answer;
241: }
242:
243: # ----------------------------------------------------------- Send USR1 to lonc
244:
245: sub reconlonc {
246: my $peerfile=shift;
247: &logthis("Trying to reconnect for $peerfile");
248: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
249: if (my $fh=Apache::File->new("$loncfile")) {
250: my $loncpid=<$fh>;
251: chomp($loncpid);
252: if (kill 0 => $loncpid) {
253: &logthis("lonc at pid $loncpid responding, sending USR1");
254: kill USR1 => $loncpid;
255: sleep 1;
256: if (-e "$peerfile") { return; }
257: &logthis("$peerfile still not there, give it another try");
258: sleep 5;
259: if (-e "$peerfile") { return; }
260: &logthis(
261: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
262: } else {
263: &logthis(
264: "<font color=blue>WARNING:".
265: " lonc at pid $loncpid not responding, giving up</font>");
266: }
267: } else {
268: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
269: }
270: }
271:
272: # ------------------------------------------------------ Critical communication
273:
274: sub critical {
275: my ($cmd,$server)=@_;
276: unless ($hostname{$server}) {
277: &logthis("<font color=blue>WARNING:".
278: " Critical message to unknown server ($server)</font>");
279: return 'no_such_host';
280: }
281: my $answer=reply($cmd,$server);
282: if ($answer eq 'con_lost') {
283: my $pingreply=reply('ping',$server);
284: &reconlonc("$perlvar{'lonSockDir'}/$server");
285: my $pongreply=reply('pong',$server);
286: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
287: $answer=reply($cmd,$server);
288: if ($answer eq 'con_lost') {
289: my $now=time;
290: my $middlename=$cmd;
291: $middlename=substr($middlename,0,16);
292: $middlename=~s/\W//g;
293: my $dfilename=
294: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
295: {
296: my $dfh;
297: if ($dfh=Apache::File->new(">$dfilename")) {
298: print $dfh "$cmd\n";
299: }
300: }
301: sleep 2;
302: my $wcmd='';
303: {
304: my $dfh;
305: if ($dfh=Apache::File->new("$dfilename")) {
306: $wcmd=<$dfh>;
307: }
308: }
309: chomp($wcmd);
310: if ($wcmd eq $cmd) {
311: &logthis("<font color=blue>WARNING: ".
312: "Connection buffer $dfilename: $cmd</font>");
313: &logperm("D:$server:$cmd");
314: return 'con_delayed';
315: } else {
316: &logthis("<font color=red>CRITICAL:"
317: ." Critical connection failed: $server $cmd</font>");
318: &logperm("F:$server:$cmd");
319: return 'con_failed';
320: }
321: }
322: }
323: return $answer;
324: }
325:
326: # ---------------------------------------------------------- Append Environment
327:
328: sub appenv {
329: my %newenv=@_;
330: map {
331: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
332: &logthis("<font color=blue>WARNING: ".
333: "Attempt to modify environment ".$_." to ".$newenv{$_}
334: .'</font>');
335: delete($newenv{$_});
336: } else {
337: $ENV{$_}=$newenv{$_};
338: }
339: } keys %newenv;
340:
341: my $lockfh;
342: unless ($lockfh=Apache::File->new("$ENV{'user.environment'}")) {
343: return 'error: '.$!;
344: }
345: unless (flock($lockfh,LOCK_EX)) {
346: &logthis("<font color=blue>WARNING: ".
347: 'Could not obtain exclusive lock in appenv: '.$!);
348: $lockfh->close();
349: return 'error: '.$!;
350: }
351:
352: my @oldenv;
353: {
354: my $fh;
355: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
356: return 'error: '.$!;
357: }
358: @oldenv=<$fh>;
359: $fh->close();
360: }
361: for (my $i=0; $i<=$#oldenv; $i++) {
362: chomp($oldenv[$i]);
363: if ($oldenv[$i] ne '') {
364: my ($name,$value)=split(/=/,$oldenv[$i]);
365: unless (defined($newenv{$name})) {
366: $newenv{$name}=$value;
367: }
368: }
369: }
370: {
371: my $fh;
372: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
373: return 'error';
374: }
375: my $newname;
376: foreach $newname (keys %newenv) {
377: print $fh "$newname=$newenv{$newname}\n";
378: }
379: $fh->close();
380: }
381:
382: $lockfh->close();
383: return 'ok';
384: }
385: # ----------------------------------------------------- Delete from Environment
386:
387: sub delenv {
388: my $delthis=shift;
389: my %newenv=();
390: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
391: &logthis("<font color=blue>WARNING: ".
392: "Attempt to delete from environment ".$delthis);
393: return 'error';
394: }
395: my @oldenv;
396: {
397: my $fh;
398: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
399: return 'error';
400: }
401: unless (flock($fh,LOCK_SH)) {
402: &logthis("<font color=blue>WARNING: ".
403: 'Could not obtain shared lock in delenv: '.$!);
404: $fh->close();
405: return 'error: '.$!;
406: }
407: @oldenv=<$fh>;
408: $fh->close();
409: }
410: {
411: my $fh;
412: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
413: return 'error';
414: }
415: unless (flock($fh,LOCK_EX)) {
416: &logthis("<font color=blue>WARNING: ".
417: 'Could not obtain exclusive lock in delenv: '.$!);
418: $fh->close();
419: return 'error: '.$!;
420: }
421: map {
422: unless ($_=~/^$delthis/) { print $fh $_; }
423: } @oldenv;
424: $fh->close();
425: }
426: return 'ok';
427: }
428:
429: # ------------------------------ Find server with least workload from spare.tab
430:
431: sub spareserver {
432: my $tryserver;
433: my $spareserver='';
434: my $lowestserver=100;
435: foreach $tryserver (keys %spareid) {
436: my $answer=reply('load',$tryserver);
437: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
438: $spareserver="http://$hostname{$tryserver}";
439: $lowestserver=$answer;
440: }
441: }
442: return $spareserver;
443: }
444:
445: # ----------------------- Try to determine user's current authentication scheme
446:
447: sub queryauthenticate {
448: my ($uname,$udom)=@_;
449: if (($perlvar{'lonRole'} eq 'library') &&
450: ($udom eq $perlvar{'lonDefDomain'})) {
451: my $answer=reply("encrypt:currentauth:$udom:$uname",
452: $perlvar{'lonHostID'});
453: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
454: if (length($answer)) {
455: return $answer;
456: }
457: else {
458: &logthis("User $uname at $udom lacks an authentication mechanism");
459: return 'no_host';
460: }
461: }
462: }
463:
464: my $tryserver;
465: foreach $tryserver (keys %libserv) {
466: if ($hostdom{$tryserver} eq $udom) {
467: my $answer=reply("encrypt:currentauth:$udom:$uname",$tryserver);
468: unless ($answer eq 'unknown_user' or $answer eq 'refused') {
469: if (length($answer)) {
470: return $answer;
471: }
472: else {
473: &logthis("User $uname at $udom lacks an authentication mechanism");
474: return 'no_host';
475: }
476: }
477: }
478: }
479: &logthis("User $uname at $udom lacks an authentication mechanism");
480: return 'no_host';
481: }
482:
483: # --------- Try to authenticate user from domain's lib servers (first this one)
484:
485: sub authenticate {
486: my ($uname,$upass,$udom)=@_;
487: $upass=escape($upass);
488: if (($perlvar{'lonRole'} eq 'library') &&
489: ($udom eq $perlvar{'lonDefDomain'})) {
490: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
491: if ($answer =~ /authorized/) {
492: if ($answer eq 'authorized') {
493: &logthis("User $uname at $udom authorized by local server");
494: return $perlvar{'lonHostID'};
495: }
496: if ($answer eq 'non_authorized') {
497: &logthis("User $uname at $udom rejected by local server");
498: return 'no_host';
499: }
500: }
501: }
502:
503: my $tryserver;
504: foreach $tryserver (keys %libserv) {
505: if ($hostdom{$tryserver} eq $udom) {
506: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
507: if ($answer =~ /authorized/) {
508: if ($answer eq 'authorized') {
509: &logthis("User $uname at $udom authorized by $tryserver");
510: return $tryserver;
511: }
512: if ($answer eq 'non_authorized') {
513: &logthis("User $uname at $udom rejected by $tryserver");
514: return 'no_host';
515: }
516: }
517: }
518: }
519: &logthis("User $uname at $udom could not be authenticated");
520: return 'no_host';
521: }
522:
523: # ---------------------- Find the homebase for a user from domain's lib servers
524:
525: sub homeserver {
526: my ($uname,$udom)=@_;
527:
528: my $index="$uname:$udom";
529: if ($homecache{$index}) { return "$homecache{$index}"; }
530:
531: my $tryserver;
532: foreach $tryserver (keys %libserv) {
533: if ($hostdom{$tryserver} eq $udom) {
534: my $answer=reply("home:$udom:$uname",$tryserver);
535: if ($answer eq 'found') {
536: $homecache{$index}=$tryserver;
537: return $tryserver;
538: }
539: }
540: }
541: return 'no_host';
542: }
543:
544: # ------------------------------------- Find the usernames behind a list of IDs
545:
546: sub idget {
547: my ($udom,@ids)=@_;
548: my %returnhash=();
549:
550: my $tryserver;
551: foreach $tryserver (keys %libserv) {
552: if ($hostdom{$tryserver} eq $udom) {
553: my $idlist=join('&',@ids);
554: $idlist=~tr/A-Z/a-z/;
555: my $reply=&reply("idget:$udom:".$idlist,$tryserver);
556: my @answer=();
557: if (($reply ne 'con_lost') && ($reply!~/^error\:/)) {
558: @answer=split(/\&/,$reply);
559: } ;
560: my $i;
561: for ($i=0;$i<=$#ids;$i++) {
562: if ($answer[$i]) {
563: $returnhash{$ids[$i]}=$answer[$i];
564: }
565: }
566: }
567: }
568: return %returnhash;
569: }
570:
571: # ------------------------------------- Find the IDs behind a list of usernames
572:
573: sub idrget {
574: my ($udom,@unames)=@_;
575: my %returnhash=();
576: map {
577: $returnhash{$_}=(&userenvironment($udom,$_,'id'))[1];
578: } @unames;
579: return %returnhash;
580: }
581:
582: # ------------------------------- Store away a list of names and associated IDs
583:
584: sub idput {
585: my ($udom,%ids)=@_;
586: my %servers=();
587: map {
588: my $uhom=&homeserver($_,$udom);
589: if ($uhom ne 'no_host') {
590: my $id=&escape($ids{$_});
591: $id=~tr/A-Z/a-z/;
592: my $unam=&escape($_);
593: if ($servers{$uhom}) {
594: $servers{$uhom}.='&'.$id.'='.$unam;
595: } else {
596: $servers{$uhom}=$id.'='.$unam;
597: }
598: &critical('put:'.$udom.':'.$unam.':environment:id='.$id,$uhom);
599: }
600: } keys %ids;
601: map {
602: &critical('idput:'.$udom.':'.$servers{$_},$_);
603: } keys %servers;
604: }
605:
606: # ------------------------------------- Find the section of student in a course
607:
608: sub usection {
609: my ($udom,$unam,$courseid)=@_;
610: $courseid=~s/\_/\//g;
611: $courseid=~s/^(\w)/\/$1/;
612: map {
613: my ($key,$value)=split(/\=/,$_);
614: $key=&unescape($key);
615: if ($key=~/^$courseid(?:\/)*(\w+)*\_st$/) {
616: my $section=$1;
617: if ($key eq $courseid.'_st') { $section=''; }
618: my ($dummy,$end,$start)=split(/\_/,&unescape($value));
619: my $now=time;
620: my $notactive=0;
621: if ($start) {
622: if ($now<$start) { $notactive=1; }
623: }
624: if ($end) {
625: if ($now>$end) { $notactive=1; }
626: }
627: unless ($notactive) { return $section; }
628: }
629: } split(/\&/,&reply('dump:'.$udom.':'.$unam.':roles',
630: &homeserver($unam,$udom)));
631: return '-1';
632: }
633:
634: # ------------------------------------- Read an entry from a user's environment
635:
636: sub userenvironment {
637: my ($udom,$unam,@what)=@_;
638: my %returnhash=();
639: my @answer=split(/\&/,
640: &reply('get:'.$udom.':'.$unam.':environment:'.join('&',@what),
641: &homeserver($unam,$udom)));
642: my $i;
643: for ($i=0;$i<=$#what;$i++) {
644: $returnhash{$what[$i]}=&unescape($answer[$i]);
645: }
646: return %returnhash;
647: }
648:
649: # ----------------------------- Subscribe to a resource, return URL if possible
650:
651: sub subscribe {
652: my $fname=shift;
653: my $author=$fname;
654: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
655: my ($udom,$uname)=split(/\//,$author);
656: my $home=homeserver($uname,$udom);
657: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
658: return 'not_found';
659: }
660: my $answer=reply("sub:$fname",$home);
661: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
662: $answer.=' by '.$home;
663: }
664: return $answer;
665: }
666:
667: # -------------------------------------------------------------- Replicate file
668:
669: sub repcopy {
670: my $filename=shift;
671: $filename=~s/\/+/\//g;
672: my $transname="$filename.in.transfer";
673: if ((-e $filename) || (-e $transname)) { return OK; }
674: my $remoteurl=subscribe($filename);
675: if ($remoteurl =~ /^con_lost by/) {
676: &logthis("Subscribe returned $remoteurl: $filename");
677: return HTTP_SERVICE_UNAVAILABLE;
678: } elsif ($remoteurl eq 'not_found') {
679: &logthis("Subscribe returned not_found: $filename");
680: return HTTP_NOT_FOUND;
681: } elsif ($remoteurl =~ /^rejected by/) {
682: &logthis("Subscribe returned $remoteurl: $filename");
683: return FORBIDDEN;
684: } elsif ($remoteurl eq 'directory') {
685: return OK;
686: } else {
687: my @parts=split(/\//,$filename);
688: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
689: if ($path ne "$perlvar{'lonDocRoot'}/res") {
690: &logthis("Malconfiguration for replication: $filename");
691: return HTTP_BAD_REQUEST;
692: }
693: my $count;
694: for ($count=5;$count<$#parts;$count++) {
695: $path.="/$parts[$count]";
696: if ((-e $path)!=1) {
697: mkdir($path,0777);
698: }
699: }
700: my $ua=new LWP::UserAgent;
701: my $request=new HTTP::Request('GET',"$remoteurl");
702: my $response=$ua->request($request,$transname);
703: if ($response->is_error()) {
704: unlink($transname);
705: my $message=$response->status_line;
706: &logthis("<font color=blue>WARNING:"
707: ." LWP get: $message: $filename</font>");
708: return HTTP_SERVICE_UNAVAILABLE;
709: } else {
710: if ($remoteurl!~/\.meta$/) {
711: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
712: my $mresponse=$ua->request($mrequest,$filename.'.meta');
713: if ($mresponse->is_error()) {
714: unlink($filename.'.meta');
715: &logthis(
716: "<font color=yellow>INFO: No metadata: $filename</font>");
717: }
718: }
719: rename($transname,$filename);
720: return OK;
721: }
722: }
723: }
724:
725: # --------------------------------------------------------- Server Side Include
726:
727: sub ssi {
728:
729: my ($fn,%form)=@_;
730:
731: my $ua=new LWP::UserAgent;
732:
733: my $request;
734:
735: if (%form) {
736: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
737: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
738: } else {
739: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
740: }
741:
742: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
743: my $response=$ua->request($request);
744:
745: return $response->content;
746: }
747:
748: # ------------------------------------------------------------------------- Log
749:
750: sub log {
751: my ($dom,$nam,$hom,$what)=@_;
752: return critical("log:$dom:$nam:$what",$hom);
753: }
754:
755: # ------------------------------------------------------------------ Course Log
756:
757: sub flushcourselogs {
758: &logthis('Flushing course log buffers');
759: map {
760: my $crsid=$_;
761: if (&reply('log:'.$coursedombuf{$crsid}.':'.
762: &escape($courselogs{$crsid}),
763: $coursehombuf{$crsid}) eq 'ok') {
764: delete $courselogs{$crsid};
765: } else {
766: &logthis('Failed to flush log buffer for '.$crsid);
767: if (length($courselogs{$crsid})>40000) {
768: &logthis("<font color=blue>WARNING: Buffer for ".$crsid.
769: " exceeded maximum size, deleting.</font>");
770: delete $courselogs{$crsid};
771: }
772: }
773: } keys %courselogs;
774: &logthis('Flushing access logs');
775: map {
776: my $entry=$_;
777: $entry=~/\_\_\_(\w+)\/(\w+)\/(.*)\_\_\_(\w+)$/;
778: my %temphash=($entry => $accesshash{$entry});
779: if (&Apache::lonnet::put('resevaldata',\%temphash,$1,$2) eq 'ok') {
780: delete $accesshash{$entry};
781: }
782: } keys %accesshash;
783: $dumpcount++;
784: }
785:
786: sub courselog {
787: my $what=shift;
788: $what=time.':'.$what;
789: unless ($ENV{'request.course.id'}) { return ''; }
790: $coursedombuf{$ENV{'request.course.id'}}=
791: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
792: $ENV{'course.'.$ENV{'request.course.id'}.'.num'};
793: $coursehombuf{$ENV{'request.course.id'}}=
794: $ENV{'course.'.$ENV{'request.course.id'}.'.home'};
795: if (defined $courselogs{$ENV{'request.course.id'}}) {
796: $courselogs{$ENV{'request.course.id'}}.='&'.$what;
797: } else {
798: $courselogs{$ENV{'request.course.id'}}.=$what;
799: }
800: if (length($courselogs{$ENV{'request.course.id'}})>4048) {
801: &flushcourselogs();
802: }
803: }
804:
805: sub courseacclog {
806: my $fnsymb=shift;
807: unless ($ENV{'request.course.id'}) { return ''; }
808: my $what=$fnsymb.':'.$ENV{'user.name'}.':'.$ENV{'user.domain'};
809: if ($what=~/(problem|exam|quiz|assess|survey|form)$/) {
810: $what.=':POST';
811: map {
812: if ($_=~/^form\.(.*)/) {
813: $what.=':'.$1.'='.$ENV{$_};
814: }
815: } keys %ENV;
816: }
817: &courselog($what);
818: }
819:
820: sub countacc {
821: my $url=&declutter(shift);
822: unless ($ENV{'request.course.id'}) { return ''; }
823: $accesshash{$ENV{'request.course.id'}.'___'.$url.'___course'}=1;
824: my $key=$processmarker.'_'.$dumpcount.'___'.$url.'___count';
825: if (defined($accesshash{$key})) {
826: $accesshash{$key}++;
827: } else {
828: $accesshash{$key}=1;
829: }
830: }
831:
832: # ----------------------------------------------------------- Check out an item
833:
834: sub checkout {
835: my ($symb,$tuname,$tudom,$tcrsid)=@_;
836: my $now=time;
837: my $lonhost=$perlvar{'lonHostID'};
838: my $infostr=&escape(
839: $tuname.'&'.
840: $tudom.'&'.
841: $tcrsid.'&'.
842: $symb.'&'.
843: $now.'&'.$ENV{'REMOTE_ADDR'});
844: my $token=&reply('tmpput:'.$infostr,$lonhost);
845: if ($token=~/^error\:/) {
846: &logthis("<font color=blue>WARNING: ".
847: "Checkout tmpput failed ".$tudom.' - '.$tuname.' - '.$symb.
848: "</font>");
849: return '';
850: }
851:
852: $token=~s/^(\d+)\_.*\_(\d+)$/$1\*$2\*$lonhost/;
853: $token=~tr/a-z/A-Z/;
854:
855: my %infohash=('resource.0.outtoken' => $token,
856: 'resource.0.checkouttime' => $now,
857: 'resource.0.outremote' => $ENV{'REMOTE_ADDR'});
858:
859: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
860: return '';
861: } else {
862: &logthis("<font color=blue>WARNING: ".
863: "Checkout cstore failed ".$tudom.' - '.$tuname.' - '.$symb.
864: "</font>");
865: }
866:
867: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
868: &escape('Checkout '.$infostr.' - '.
869: $token)) ne 'ok') {
870: return '';
871: } else {
872: &logthis("<font color=blue>WARNING: ".
873: "Checkout log failed ".$tudom.' - '.$tuname.' - '.$symb.
874: "</font>");
875: }
876: return $token;
877: }
878:
879: # ------------------------------------------------------------ Check in an item
880:
881: sub checkin {
882: my $token=shift;
883: my $now=time;
884: my ($ta,$tb,$lonhost)=split(/\*/,$token);
885: $lonhost=~tr/A-Z/a-z/;
886: my $dtoken=$ta.'_'.$hostip{$lonhost}.'_'.$tb;
887: $dtoken=~s/\W/\_/g;
888: my ($tuname,$tudom,$tcrsid,$symb,$chtim,$rmaddr)=
889: split(/\&/,&unescape(&reply('tmpget:'.$dtoken,$lonhost)));
890:
891: unless (($tuname) && ($tudom)) {
892: &logthis('Check in '.$token.' ('.$dtoken.') failed');
893: return '';
894: }
895:
896: unless (&allowed('mgr',$tcrsid)) {
897: &logthis('Check in '.$token.' ('.$dtoken.') unauthorized: '.
898: $ENV{'user.name'}.' - '.$ENV{'user.domain'});
899: return '';
900: }
901:
902: my %infohash=('resource.0.intoken' => $token,
903: 'resource.0.checkintime' => $now,
904: 'resource.0.inremote' => $ENV{'REMOTE_ADDR'});
905:
906: unless (&cstore(\%infohash,$symb,$tcrsid,$tudom,$tuname) eq 'ok') {
907: return '';
908: }
909:
910: if (&log($tudom,$tuname,&homeserver($tuname,$tudom),
911: &escape('Checkin - '.$token)) ne 'ok') {
912: return '';
913: }
914:
915: return ($symb,$tuname,$tudom,$tcrsid);
916: }
917:
918: # --------------------------------------------- Set Expire Date for Spreadsheet
919:
920: sub expirespread {
921: my ($uname,$udom,$stype,$usymb)=@_;
922: my $cid=$ENV{'request.course.id'};
923: if ($cid) {
924: my $now=time;
925: my $key=$uname.':'.$udom.':'.$stype.':'.$usymb;
926: return &reply('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
927: $ENV{'course.'.$cid.'.num'}.
928: ':nohist_expirationdates:'.
929: &escape($key).'='.$now,
930: $ENV{'course.'.$cid.'.home'})
931: }
932: return 'ok';
933: }
934:
935: # ----------------------------------------------------- Devalidate Spreadsheets
936:
937: sub devalidate {
938: my $symb=shift;
939: my $cid=$ENV{'request.course.id'};
940: if ($cid) {
941: my $key=$ENV{'user.name'}.':'.$ENV{'user.domain'}.':';
942: my $status=
943: &del('nohist_calculatedsheet',
944: [$key.'studentcalc'],
945: $ENV{'course.'.$cid.'.domain'},
946: $ENV{'course.'.$cid.'.num'})
947: .' '.
948: &del('nohist_calculatedsheets_'.$cid,
949: [$key.'assesscalc:'.$symb]);
950: unless ($status eq 'ok ok') {
951: &logthis('Could not devalidate spreadsheet '.
952: $ENV{'user.name'}.' at '.$ENV{'user.domain'}.' for '.
953: $symb.': '.$status);
954: }
955: }
956: }
957:
958: sub hash2str {
959: my (%hash)=@_;
960: my $result='';
961: map { $result.=escape($_).'='.escape($hash{$_}).'&'; } keys %hash;
962: $result=~s/\&$//;
963: return $result;
964: }
965:
966: sub str2hash {
967: my ($string) = @_;
968: my %returnhash;
969: map {
970: my ($name,$value)=split(/\=/,$_);
971: $returnhash{&unescape($name)}=&unescape($value);
972: } split(/\&/,$string);
973: return %returnhash;
974: }
975:
976: # -------------------------------------------------------------------Temp Store
977:
978: sub tmpreset {
979: my ($symb,$namespace,$domain,$stuname) = @_;
980: if (!$symb) {
981: $symb=&symbread();
982: if (!$symb) { $symb= $ENV{'REQUEST_URI'}; }
983: }
984: $symb=escape($symb);
985:
986: if (!$namespace) { $namespace=$ENV{'request.state'}; }
987: $namespace=~s/\//\_/g;
988: $namespace=~s/\W//g;
989:
990: #FIXME needs to do something for /pub resources
991: if (!$domain) { $domain=$ENV{'user.domain'}; }
992: if (!$stuname) { $stuname=$ENV{'user.name'}; }
993: my $path=$perlvar{'lonDaemons'}.'/tmp';
994: my %hash;
995: if (tie(%hash,'GDBM_File',
996: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
997: &GDBM_WRCREAT,0640)) {
998: foreach my $key (keys %hash) {
999: if ($key=~ /:$symb/) {
1000: delete($hash{$key});
1001: }
1002: }
1003: }
1004: }
1005:
1006: sub tmpstore {
1007: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1008:
1009: if (!$symb) {
1010: $symb=&symbread();
1011: if (!$symb) { $symb= $ENV{'request.url'}; }
1012: }
1013: $symb=escape($symb);
1014:
1015: if (!$namespace) {
1016: # I don't think we would ever want to store this for a course.
1017: # it seems this will only be used if we don't have a course.
1018: #$namespace=$ENV{'request.course.id'};
1019: #if (!$namespace) {
1020: $namespace=$ENV{'request.state'};
1021: #}
1022: }
1023: $namespace=~s/\//\_/g;
1024: $namespace=~s/\W//g;
1025: #FIXME needs to do something for /pub resources
1026: if (!$domain) { $domain=$ENV{'user.domain'}; }
1027: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1028: my $now=time;
1029: my %hash;
1030: my $path=$perlvar{'lonDaemons'}.'/tmp';
1031: if (tie(%hash,'GDBM_File',
1032: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1033: &GDBM_WRCREAT,0640)) {
1034: $hash{"version:$symb"}++;
1035: my $version=$hash{"version:$symb"};
1036: my $allkeys='';
1037: foreach my $key (keys(%$storehash)) {
1038: $allkeys.=$key.':';
1039: $hash{"$version:$symb:$key"}=$$storehash{$key};
1040: }
1041: $hash{"$version:$symb:timestamp"}=$now;
1042: $allkeys.='timestamp';
1043: $hash{"$version:keys:$symb"}=$allkeys;
1044: if (untie(%hash)) {
1045: return 'ok';
1046: } else {
1047: return "error:$!";
1048: }
1049: } else {
1050: return "error:$!";
1051: }
1052: }
1053:
1054: # -----------------------------------------------------------------Temp Restore
1055:
1056: sub tmprestore {
1057: my ($symb,$namespace,$domain,$stuname) = @_;
1058:
1059: if (!$symb) {
1060: $symb=&symbread();
1061: if (!$symb) { $symb= $ENV{'request.url'}; }
1062: }
1063: $symb=escape($symb);
1064:
1065: if (!$namespace) { $namespace=$ENV{'request.state'}; }
1066: #FIXME needs to do something for /pub resources
1067: if (!$domain) { $domain=$ENV{'user.domain'}; }
1068: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1069:
1070: my %returnhash;
1071: $namespace=~s/\//\_/g;
1072: $namespace=~s/\W//g;
1073: my %hash;
1074: my $path=$perlvar{'lonDaemons'}.'/tmp';
1075: if (tie(%hash,'GDBM_File',
1076: $path.'/tmpstore_'.$stuname.'_'.$domain.'_'.$namespace.'.db',
1077: &GDBM_READER,0640)) {
1078: my $version=$hash{"version:$symb"};
1079: $returnhash{'version'}=$version;
1080: my $scope;
1081: for ($scope=1;$scope<=$version;$scope++) {
1082: my $vkeys=$hash{"$scope:keys:$symb"};
1083: my @keys=split(/:/,$vkeys);
1084: my $key;
1085: $returnhash{"$scope:keys"}=$vkeys;
1086: foreach $key (@keys) {
1087: $returnhash{"$scope:$key"}=$hash{"$scope:$symb:$key"};
1088: $returnhash{"$key"}=$hash{"$scope:$symb:$key"};
1089: }
1090: }
1091: if (!(untie(%hash))) {
1092: return "error:$!";
1093: }
1094: } else {
1095: return "error:$!";
1096: }
1097: return %returnhash;
1098: }
1099:
1100: # ----------------------------------------------------------------------- Store
1101:
1102: sub store {
1103: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1104: my $home='';
1105:
1106: if ($stuname) { $home=&homeserver($stuname,$domain); }
1107:
1108: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1109:
1110: &devalidate($symb);
1111:
1112: $symb=escape($symb);
1113: if (!$namespace) {
1114: unless ($namespace=$ENV{'request.course.id'}) {
1115: return '';
1116: }
1117: }
1118: if (!$domain) { $domain=$ENV{'user.domain'}; }
1119: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1120: if (!$home) { $home=$ENV{'user.home'}; }
1121: my $namevalue='';
1122: map {
1123: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1124: } keys %$storehash;
1125: $namevalue=~s/\&$//;
1126: &courselog($symb.':'.$stuname.':'.$domain.':STORE:'.$namevalue);
1127: return reply("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1128: }
1129:
1130: # -------------------------------------------------------------- Critical Store
1131:
1132: sub cstore {
1133: my ($storehash,$symb,$namespace,$domain,$stuname) = @_;
1134: my $home='';
1135:
1136: if ($stuname) { $home=&homeserver($stuname,$domain); }
1137:
1138: if (!$symb) { unless ($symb=&symbread()) { return ''; } }
1139:
1140: &devalidate($symb);
1141:
1142: $symb=escape($symb);
1143: if (!$namespace) {
1144: unless ($namespace=$ENV{'request.course.id'}) {
1145: return '';
1146: }
1147: }
1148: if (!$domain) { $domain=$ENV{'user.domain'}; }
1149: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1150: if (!$home) { $home=$ENV{'user.home'}; }
1151:
1152: my $namevalue='';
1153: map {
1154: $namevalue.=escape($_).'='.escape($$storehash{$_}).'&';
1155: } keys %$storehash;
1156: $namevalue=~s/\&$//;
1157: &courselog($symb.':'.$stuname.':'.$domain.':CSTORE:'.$namevalue);
1158: return critical
1159: ("store:$domain:$stuname:$namespace:$symb:$namevalue","$home");
1160: }
1161:
1162: # --------------------------------------------------------------------- Restore
1163:
1164: sub restore {
1165: my ($symb,$namespace,$domain,$stuname) = @_;
1166: my $home='';
1167:
1168: if ($stuname) { $home=&homeserver($stuname,$domain); }
1169:
1170: if (!$symb) {
1171: unless ($symb=escape(&symbread())) { return ''; }
1172: } else {
1173: $symb=&escape($symb);
1174: }
1175: if (!$namespace) {
1176: unless ($namespace=$ENV{'request.course.id'}) {
1177: return '';
1178: }
1179: }
1180: if (!$domain) { $domain=$ENV{'user.domain'}; }
1181: if (!$stuname) { $stuname=$ENV{'user.name'}; }
1182: if (!$home) { $home=$ENV{'user.home'}; }
1183: my $answer=&reply("restore:$domain:$stuname:$namespace:$symb","$home");
1184:
1185: my %returnhash=();
1186: map {
1187: my ($name,$value)=split(/\=/,$_);
1188: $returnhash{&unescape($name)}=&unescape($value);
1189: } split(/\&/,$answer);
1190: my $version;
1191: for ($version=1;$version<=$returnhash{'version'};$version++) {
1192: map {
1193: $returnhash{$_}=$returnhash{$version.':'.$_};
1194: } split(/\:/,$returnhash{$version.':keys'});
1195: }
1196: return %returnhash;
1197: }
1198:
1199: # ---------------------------------------------------------- Course Description
1200:
1201: sub coursedescription {
1202: my $courseid=shift;
1203: $courseid=~s/^\///;
1204: $courseid=~s/\_/\//g;
1205: my ($cdomain,$cnum)=split(/\//,$courseid);
1206: my $chome=&homeserver($cnum,$cdomain);
1207: if ($chome ne 'no_host') {
1208: my %returnhash=&dump('environment',$cdomain,$cnum);
1209: if (!exists($returnhash{'con_lost'})) {
1210: my $normalid=$cdomain.'_'.$cnum;
1211: my %envhash=();
1212: $returnhash{'home'}= $chome;
1213: $returnhash{'domain'} = $cdomain;
1214: $returnhash{'num'} = $cnum;
1215: while (my ($name,$value) = each %returnhash) {
1216: $envhash{'course.'.$normalid.'.'.$name}=$value;
1217: }
1218: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
1219: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
1220: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
1221: $envhash{'course.'.$normalid.'.last_cache'}=time;
1222: $envhash{'course.'.$normalid.'.home'}=$chome;
1223: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
1224: $envhash{'course.'.$normalid.'.num'}=$cnum;
1225: &appenv(%envhash);
1226: return %returnhash;
1227: }
1228: }
1229: return ();
1230: }
1231:
1232: # -------------------------------------------------------- Get user privileges
1233:
1234: sub rolesinit {
1235: my ($domain,$username,$authhost)=@_;
1236: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
1237: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
1238: my %allroles=();
1239: my %thesepriv=();
1240: my $now=time;
1241: my $userroles="user.login.time=$now\n";
1242: my $thesestr;
1243:
1244: if ($rolesdump ne '') {
1245: map {
1246: if ($_!~/^rolesdef\&/) {
1247: my ($area,$role)=split(/=/,$_);
1248: $area=~s/\_\w\w$//;
1249: my ($trole,$tend,$tstart)=split(/_/,$role);
1250: $userroles.='user.role.'.$trole.'.'.$area.'='.
1251: $tstart.'.'.$tend."\n";
1252: if ($tend!=0) {
1253: if ($tend<$now) {
1254: $trole='';
1255: }
1256: }
1257: if ($tstart!=0) {
1258: if ($tstart>$now) {
1259: $trole='';
1260: }
1261: }
1262: if (($area ne '') && ($trole ne '')) {
1263: my $spec=$trole.'.'.$area;
1264: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
1265: if ($trole =~ /^cr\//) {
1266: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
1267: my $homsvr=homeserver($rauthor,$rdomain);
1268: if ($hostname{$homsvr} ne '') {
1269: my $roledef=
1270: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
1271: $homsvr);
1272: if (($roledef ne 'con_lost') && ($roledef ne '')) {
1273: my ($syspriv,$dompriv,$coursepriv)=
1274: split(/\_/,unescape($roledef));
1275: $allroles{'cm./'}.=':'.$syspriv;
1276: $allroles{$spec.'./'}.=':'.$syspriv;
1277: if ($tdomain ne '') {
1278: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
1279: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
1280: if ($trest ne '') {
1281: $allroles{'cm.'.$area}.=':'.$coursepriv;
1282: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
1283: }
1284: }
1285: }
1286: }
1287: } else {
1288: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
1289: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
1290: if ($tdomain ne '') {
1291: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1292: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
1293: if ($trest ne '') {
1294: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
1295: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
1296: }
1297: }
1298: }
1299: }
1300: }
1301: } split(/&/,$rolesdump);
1302: my $adv=0;
1303: my $author=0;
1304: map {
1305: %thesepriv=();
1306: if (($_!~/^st/) && ($_!~/^ta/) && ($_!~/^cm/)) { $adv=1; }
1307: if (($_=~/^au/) || ($_=~/^ca/)) { $author=1; }
1308: map {
1309: if ($_ ne '') {
1310: my ($privilege,$restrictions)=split(/&/,$_);
1311: if ($restrictions eq '') {
1312: $thesepriv{$privilege}='F';
1313: } else {
1314: if ($thesepriv{$privilege} ne 'F') {
1315: $thesepriv{$privilege}.=$restrictions;
1316: }
1317: }
1318: }
1319: } split(/:/,$allroles{$_});
1320: $thesestr='';
1321: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
1322: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
1323: } keys %allroles;
1324: $userroles.='user.adv='.$adv."\n".
1325: 'user.author='.$author."\n";
1326: $ENV{'user.adv'}=$adv;
1327: }
1328: return $userroles;
1329: }
1330:
1331: # --------------------------------------------------------------- get interface
1332:
1333: sub get {
1334: my ($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: my $rep=&reply("get:$udomain:$uname:$namespace:$items",$uhome);
1345: my @pairs=split(/\&/,$rep);
1346: my %returnhash=();
1347: my $i=0;
1348: map {
1349: $returnhash{$_}=unescape($pairs[$i]);
1350: $i++;
1351: } @$storearr;
1352: return %returnhash;
1353: }
1354:
1355: # --------------------------------------------------------------- del interface
1356:
1357: sub del {
1358: my ($namespace,$storearr,$udomain,$uname)=@_;
1359: my $items='';
1360: map {
1361: $items.=escape($_).'&';
1362: } @$storearr;
1363: $items=~s/\&$//;
1364: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1365: if (!$uname) { $uname=$ENV{'user.name'}; }
1366: my $uhome=&homeserver($uname,$udomain);
1367:
1368: return &reply("del:$udomain:$uname:$namespace:$items",$uhome);
1369: }
1370:
1371: # -------------------------------------------------------------- dump interface
1372:
1373: sub dump {
1374: my ($namespace,$udomain,$uname)=@_;
1375: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1376: if (!$uname) { $uname=$ENV{'user.name'}; }
1377: my $uhome=&homeserver($uname,$udomain);
1378: my $rep=reply("dump:$udomain:$uname:$namespace",$uhome);
1379: my @pairs=split(/\&/,$rep);
1380: my %returnhash=();
1381: map {
1382: my ($key,$value)=split(/=/,$_);
1383: $returnhash{unescape($key)}=unescape($value);
1384: } @pairs;
1385: return %returnhash;
1386: }
1387:
1388: # --------------------------------------------------------------- put interface
1389:
1390: sub put {
1391: my ($namespace,$storehash,$udomain,$uname)=@_;
1392: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1393: if (!$uname) { $uname=$ENV{'user.name'}; }
1394: my $uhome=&homeserver($uname,$udomain);
1395: my $items='';
1396: map {
1397: $items.=&escape($_).'='.&escape($$storehash{$_}).'&';
1398: } keys %$storehash;
1399: $items=~s/\&$//;
1400: return &reply("put:$udomain:$uname:$namespace:$items",$uhome);
1401: }
1402:
1403: # ------------------------------------------------------ critical put interface
1404:
1405: sub cput {
1406: my ($namespace,$storehash,$udomain,$uname)=@_;
1407: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1408: if (!$uname) { $uname=$ENV{'user.name'}; }
1409: my $uhome=&homeserver($uname,$udomain);
1410: my $items='';
1411: map {
1412: $items.=escape($_).'='.escape($$storehash{$_}).'&';
1413: } keys %$storehash;
1414: $items=~s/\&$//;
1415: return &critical("put:$udomain:$uname:$namespace:$items",$uhome);
1416: }
1417:
1418: # -------------------------------------------------------------- eget interface
1419:
1420: sub eget {
1421: my ($namespace,$storearr,$udomain,$uname)=@_;
1422: my $items='';
1423: map {
1424: $items.=escape($_).'&';
1425: } @$storearr;
1426: $items=~s/\&$//;
1427: if (!$udomain) { $udomain=$ENV{'user.domain'}; }
1428: if (!$uname) { $uname=$ENV{'user.name'}; }
1429: my $uhome=&homeserver($uname,$udomain);
1430: my $rep=&reply("eget:$udomain:$uname:$namespace:$items",$uhome);
1431: my @pairs=split(/\&/,$rep);
1432: my %returnhash=();
1433: my $i=0;
1434: map {
1435: $returnhash{$_}=unescape($pairs[$i]);
1436: $i++;
1437: } @$storearr;
1438: return %returnhash;
1439: }
1440:
1441: # ------------------------------------------------- Check for a user privilege
1442:
1443: sub allowed {
1444: my ($priv,$uri)=@_;
1445:
1446: my $orguri=$uri;
1447: $uri=&declutter($uri);
1448:
1449: # Free bre access to adm and meta resources
1450:
1451: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
1452: return 'F';
1453: }
1454:
1455: # Free bre to public access
1456:
1457: if ($priv eq 'bre') {
1458: if (&metadata($uri,'copyright') eq 'public') { return 'F'; }
1459: }
1460:
1461: my $thisallowed='';
1462: my $statecond=0;
1463: my $courseprivid='';
1464:
1465: # Course
1466:
1467: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
1468: $thisallowed.=$1;
1469: }
1470:
1471: # Domain
1472:
1473: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
1474: =~/$priv\&([^\:]*)/) {
1475: $thisallowed.=$1;
1476: }
1477:
1478: # Course: uri itself is a course
1479: my $courseuri=$uri;
1480: $courseuri=~s/\_(\d)/\/$1/;
1481: $courseuri=~s/^([^\/])/\/$1/;
1482:
1483: if ($ENV{'user.priv.'.$ENV{'request.role'}.'.'.$courseuri}
1484: =~/$priv\&([^\:]*)/) {
1485: $thisallowed.=$1;
1486: }
1487:
1488: # Full access at system, domain or course-wide level? Exit.
1489:
1490: if ($thisallowed=~/F/) {
1491: return 'F';
1492: }
1493:
1494: # If this is generating or modifying users, exit with special codes
1495:
1496: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:cca:'=~/\:$priv\:/) {
1497: return $thisallowed;
1498: }
1499: #
1500: # Gathered so far: system, domain and course wide privileges
1501: #
1502: # Course: See if uri or referer is an individual resource that is part of
1503: # the course
1504:
1505: if ($ENV{'request.course.id'}) {
1506: $courseprivid=$ENV{'request.course.id'};
1507: if ($ENV{'request.course.sec'}) {
1508: $courseprivid.='/'.$ENV{'request.course.sec'};
1509: }
1510: $courseprivid=~s/\_/\//;
1511: my $checkreferer=1;
1512: my @uriparts=split(/\//,$uri);
1513: my $filename=$uriparts[$#uriparts];
1514: my $pathname=$uri;
1515: $pathname=~s/\/$filename$//;
1516: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1517: /\&$filename\:([\d\|]+)\&/) {
1518: $statecond=$1;
1519: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1520: =~/$priv\&([^\:]*)/) {
1521: $thisallowed.=$1;
1522: $checkreferer=0;
1523: }
1524: }
1525:
1526: if ($checkreferer) {
1527: my $refuri=$ENV{'httpref.'.$orguri};
1528:
1529: unless ($refuri) {
1530: map {
1531: if ($_=~/^httpref\..*\*/) {
1532: my $pattern=$_;
1533: $pattern=~s/^httpref\.\/res\///;
1534: $pattern=~s/\*/\[\^\/\]\+/g;
1535: $pattern=~s/\//\\\//g;
1536: if ($orguri=~/$pattern/) {
1537: $refuri=$ENV{$_};
1538: }
1539: }
1540: } keys %ENV;
1541: }
1542: if ($refuri) {
1543: $refuri=&declutter($refuri);
1544: my @uriparts=split(/\//,$refuri);
1545: my $filename=$uriparts[$#uriparts];
1546: my $pathname=$refuri;
1547: $pathname=~s/\/$filename$//;
1548: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
1549: /\&$filename\:([\d\|]+)\&/) {
1550: my $refstatecond=$1;
1551: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
1552: =~/$priv\&([^\:]*)/) {
1553: $thisallowed.=$1;
1554: $uri=$refuri;
1555: $statecond=$refstatecond;
1556: }
1557: }
1558: }
1559: }
1560: }
1561:
1562: #
1563: # Gathered now: all privileges that could apply, and condition number
1564: #
1565: #
1566: # Full or no access?
1567: #
1568:
1569: if ($thisallowed=~/F/) {
1570: return 'F';
1571: }
1572:
1573: unless ($thisallowed) {
1574: return '';
1575: }
1576:
1577: # Restrictions exist, deal with them
1578: #
1579: # C:according to course preferences
1580: # R:according to resource settings
1581: # L:unless locked
1582: # X:according to user session state
1583: #
1584:
1585: # Possibly locked functionality, check all courses
1586: # Locks might take effect only after 10 minutes cache expiration for other
1587: # courses, and 2 minutes for current course
1588:
1589: my $envkey;
1590: if ($thisallowed=~/L/) {
1591: foreach $envkey (keys %ENV) {
1592: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
1593: my $courseid=$2;
1594: my $roleid=$1.'.'.$2;
1595: $courseid=~s/^\///;
1596: my $expiretime=600;
1597: if ($ENV{'request.role'} eq $roleid) {
1598: $expiretime=120;
1599: }
1600: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
1601: my $prefix='course.'.$cdom.'_'.$cnum.'.';
1602: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
1603: &coursedescription($courseid);
1604: }
1605: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
1606: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
1607: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
1608: &log($ENV{'user.domain'},$ENV{'user.name'},
1609: $ENV{'user.host'},
1610: 'Locked by res: '.$priv.' for '.$uri.' due to '.
1611: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1612: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1613: return '';
1614: }
1615: }
1616: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
1617: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
1618: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
1619: &log($ENV{'user.domain'},$ENV{'user.name'},
1620: $ENV{'user.host'},
1621: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
1622: $cdom.'/'.$cnum.'/'.$csec.' expire '.
1623: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
1624: return '';
1625: }
1626: }
1627: }
1628: }
1629: }
1630:
1631: #
1632: # Rest of the restrictions depend on selected course
1633: #
1634:
1635: unless ($ENV{'request.course.id'}) {
1636: return '1';
1637: }
1638:
1639: #
1640: # Now user is definitely in a course
1641: #
1642:
1643:
1644: # Course preferences
1645:
1646: if ($thisallowed=~/C/) {
1647: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1648: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
1649: =~/\,$rolecode\,/) {
1650: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1651: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
1652: $ENV{'request.course.id'});
1653: return '';
1654: }
1655: }
1656:
1657: # Resource preferences
1658:
1659: if ($thisallowed=~/R/) {
1660: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
1661: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1662: if (-e $filename) {
1663: my @content;
1664: {
1665: my $fh=Apache::File->new($filename);
1666: @content=<$fh>;
1667: }
1668: if (join('',@content)=~
1669: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
1670: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
1671: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
1672: return '';
1673:
1674: }
1675: }
1676: }
1677:
1678: # Restricted by state?
1679:
1680: if ($thisallowed=~/X/) {
1681: if (&condval($statecond)) {
1682: return '2';
1683: } else {
1684: return '';
1685: }
1686: }
1687:
1688: return 'F';
1689: }
1690:
1691: # ----------------------------------------------------------------- Define Role
1692:
1693: sub definerole {
1694: if (allowed('mcr','/')) {
1695: my ($rolename,$sysrole,$domrole,$courole)=@_;
1696: map {
1697: my ($crole,$cqual)=split(/\&/,$_);
1698: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
1699: if ($pr{'cr:s'}=~/$crole\&/) {
1700: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
1701: return "refused:s:$crole&$cqual";
1702: }
1703: }
1704: } split('/',$sysrole);
1705: map {
1706: my ($crole,$cqual)=split(/\&/,$_);
1707: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
1708: if ($pr{'cr:d'}=~/$crole\&/) {
1709: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
1710: return "refused:d:$crole&$cqual";
1711: }
1712: }
1713: } split('/',$domrole);
1714: map {
1715: my ($crole,$cqual)=split(/\&/,$_);
1716: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1717: if ($pr{'cr:c'}=~/$crole\&/) {
1718: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1719: return "refused:c:$crole&$cqual";
1720: }
1721: }
1722: } split('/',$courole);
1723: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1724: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1725: "rolesdef_$rolename=".
1726: escape($sysrole.'_'.$domrole.'_'.$courole);
1727: return reply($command,$ENV{'user.home'});
1728: } else {
1729: return 'refused';
1730: }
1731: }
1732:
1733: # ---------------- Make a metadata query against the network of library servers
1734:
1735: sub metadata_query {
1736: my ($query,$custom,$customshow)=@_;
1737: my %rhash;
1738: for my $server (keys %libserv) {
1739: unless ($custom or $customshow) {
1740: my $reply=&reply("querysend:".&escape($query),$server);
1741: $rhash{$server}=$reply;
1742: }
1743: else {
1744: my $reply=&reply("querysend:".&escape($query).':'.
1745: &escape($custom).':'.&escape($customshow),
1746: $server);
1747: $rhash{$server}=$reply;
1748: }
1749: }
1750: return \%rhash;
1751: }
1752:
1753: # ------------------------------------------------------------------ Plain Text
1754:
1755: sub plaintext {
1756: my $short=shift;
1757: return $prp{$short};
1758: }
1759:
1760: # ------------------------------------------------------------------ Plain Text
1761:
1762: sub fileembstyle {
1763: my $ending=lc(shift);
1764: return $fe{$ending};
1765: }
1766:
1767: # ------------------------------------------------------------ Description Text
1768:
1769: sub filedescription {
1770: my $ending=lc(shift);
1771: return $fd{$ending};
1772: }
1773:
1774: # ----------------------------------------------------------------- Assign Role
1775:
1776: sub assignrole {
1777: my ($udom,$uname,$url,$role,$end,$start)=@_;
1778: my $mrole;
1779: if ($role =~ /^cr\//) {
1780: unless (&allowed('ccr',$url)) {
1781: &logthis('Refused custom assignrole: '.
1782: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1783: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1784: return 'refused';
1785: }
1786: $mrole='cr';
1787: } else {
1788: my $cwosec=$url;
1789: $cwosec=~s/^\/(\w+)\/(\w+)\/.*/$1\/$2/;
1790: unless (&allowed('c'.$role,$cwosec)) {
1791: &logthis('Refused assignrole: '.
1792: $udom.' '.$uname.' '.$url.' '.$role.' '.$end.' '.$start.' by '.
1793: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1794: return 'refused';
1795: }
1796: $mrole=$role;
1797: }
1798: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1799: "$udom:$uname:$url".'_'."$mrole=$role";
1800: if ($end) { $command.='_'.$end; }
1801: if ($start) {
1802: if ($end) {
1803: $command.='_'.$start;
1804: } else {
1805: $command.='_0_'.$start;
1806: }
1807: }
1808: return &reply($command,&homeserver($uname,$udom));
1809: }
1810:
1811: # -------------------------------------------------- Modify user authentication
1812: sub modifyuserauth {
1813: my ($udom,$uname,$umode,$upass)=@_;
1814: my $uhome=&homeserver($uname,$udom);
1815: &logthis('Call to modify user authentication'.$udom.', '.$uname.', '.
1816: $umode.' by '.$ENV{'user.name'}.' at '.$ENV{'user.domain'});
1817: my $reply=&reply('encrypt:changeuserauth:'.$udom.':'.$uname.':'.$umode.':'.
1818: &escape($upass),$uhome);
1819: unless ($reply eq 'ok') {
1820: return 'error: '.$reply;
1821: }
1822: return 'ok';
1823: }
1824:
1825: # --------------------------------------------------------------- Modify a user
1826:
1827:
1828: sub modifyuser {
1829: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene)=@_;
1830: &logthis('Call to modify user '.$udom.', '.$uname.', '.$uid.', '.
1831: $umode.', '.$first.', '.$middle.', '.
1832: $last.', '.$gene.' by '.
1833: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1834: my $uhome=&homeserver($uname,$udom);
1835: # ----------------------------------------------------------------- Create User
1836: if (($uhome eq 'no_host') && ($umode) && ($upass)) {
1837: my $unhome='';
1838: if ($ENV{'course.'.$ENV{'request.course.id'}.'.domain'} eq $udom) {
1839: $unhome=$ENV{'course.'.$ENV{'request.course.id'}.'.home'};
1840: } else {
1841: my $tryserver;
1842: my $loadm=10000000;
1843: foreach $tryserver (keys %libserv) {
1844: if ($hostdom{$tryserver} eq $udom) {
1845: my $answer=reply('load',$tryserver);
1846: if (($answer=~/\d+/) && ($answer<$loadm)) {
1847: $loadm=$answer;
1848: $unhome=$tryserver;
1849: }
1850: }
1851: }
1852: }
1853: if (($unhome eq '') || ($unhome eq 'no_host')) {
1854: return 'error: find home';
1855: }
1856: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':'.$umode.':'.
1857: &escape($upass),$unhome);
1858: unless ($reply eq 'ok') {
1859: return 'error: '.$reply;
1860: }
1861: $uhome=&homeserver($uname,$udom);
1862: if (($uhome eq '') || ($uhome eq 'no_host') || ($uhome ne $unhome)) {
1863: return 'error: verify home';
1864: }
1865: }
1866: # ---------------------------------------------------------------------- Add ID
1867: if ($uid) {
1868: $uid=~tr/A-Z/a-z/;
1869: my %uidhash=&idrget($udom,$uname);
1870: if (($uidhash{$uname}) && ($uidhash{$uname}!~/error\:/)) {
1871: unless ($uid eq $uidhash{$uname}) {
1872: return 'error: mismatch '.$uidhash{$uname}.' versus '.$uid;
1873: }
1874: } else {
1875: &idput($udom,($uname => $uid));
1876: }
1877: }
1878: # -------------------------------------------------------------- Add names, etc
1879: my %names=&get('environment',
1880: ['firstname','middlename','lastname','generation'],
1881: $udom,$uname);
1882: if ($first) { $names{'firstname'} = $first; }
1883: if ($middle) { $names{'middlename'} = $middle; }
1884: if ($last) { $names{'lastname'} = $last; }
1885: if ($gene) { $names{'generation'} = $gene; }
1886: my $reply = &put('environment', \%names, $udom,$uname);
1887: if ($reply ne 'ok') { return 'error: '.$reply; }
1888: &logthis('Success modifying user '.$udom.', '.$uname.', '.$uid.', '.
1889: $umode.', '.$first.', '.$middle.', '.
1890: $last.', '.$gene.' by '.
1891: $ENV{'user.name'}.' at '.$ENV{'user.domain'});
1892: return 'ok';
1893: }
1894:
1895: # -------------------------------------------------------------- Modify student
1896:
1897: sub modifystudent {
1898: my ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene,$usec,
1899: $end,$start)=@_;
1900: my $cid='';
1901: unless ($cid=$ENV{'request.course.id'}) {
1902: return 'not_in_class';
1903: }
1904: # --------------------------------------------------------------- Make the user
1905: my $reply=&modifyuser
1906: ($udom,$uname,$uid,$umode,$upass,$first,$middle,$last,$gene);
1907: unless ($reply eq 'ok') { return $reply; }
1908: my $uhome=&homeserver($uname,$udom);
1909: if (($uhome eq '') || ($uhome eq 'no_host')) {
1910: return 'error: no such user';
1911: }
1912: # -------------------------------------------------- Add student to course list
1913: $reply=critical('put:'.$ENV{'course.'.$cid.'.domain'}.':'.
1914: $ENV{'course.'.$cid.'.num'}.':classlist:'.
1915: &escape($uname.':'.$udom).'='.
1916: &escape($end.':'.$start),
1917: $ENV{'course.'.$cid.'.home'});
1918: unless (($reply eq 'ok') || ($reply eq 'delayed')) {
1919: return 'error: '.$reply;
1920: }
1921: # ---------------------------------------------------- Add student role to user
1922: my $uurl='/'.$cid;
1923: $uurl=~s/\_/\//g;
1924: if ($usec) {
1925: $uurl.='/'.$usec;
1926: }
1927: return &assignrole($udom,$uname,$uurl,'st',$end,$start);
1928: }
1929:
1930: # ------------------------------------------------- Write to course preferences
1931:
1932: sub writecoursepref {
1933: my ($courseid,%prefs)=@_;
1934: $courseid=~s/^\///;
1935: $courseid=~s/\_/\//g;
1936: my ($cdomain,$cnum)=split(/\//,$courseid);
1937: my $chome=homeserver($cnum,$cdomain);
1938: if (($chome eq '') || ($chome eq 'no_host')) {
1939: return 'error: no such course';
1940: }
1941: my $cstring='';
1942: map {
1943: $cstring.=escape($_).'='.escape($prefs{$_}).'&';
1944: } keys %prefs;
1945: $cstring=~s/\&$//;
1946: return reply('put:'.$cdomain.':'.$cnum.':environment:'.$cstring,$chome);
1947: }
1948:
1949: # ---------------------------------------------------------- Make/modify course
1950:
1951: sub createcourse {
1952: my ($udom,$description,$url)=@_;
1953: $url=&declutter($url);
1954: my $cid='';
1955: unless (&allowed('ccc',$ENV{'user.domain'})) {
1956: return 'refused';
1957: }
1958: unless ($udom eq $ENV{'user.domain'}) {
1959: return 'refused';
1960: }
1961: # ------------------------------------------------------------------- Create ID
1962: my $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1963: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1964: # ----------------------------------------------- Make sure that does not exist
1965: my $uhome=&homeserver($uname,$udom);
1966: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1967: $uname=substr($$.time,0,5).unpack("H8",pack("I32",time)).
1968: unpack("H2",pack("I32",int(rand(255)))).$perlvar{'lonHostID'};
1969: $uhome=&homeserver($uname,$udom);
1970: unless (($uhome eq '') || ($uhome eq 'no_host')) {
1971: return 'error: unable to generate unique course-ID';
1972: }
1973: }
1974: # ------------------------------------------------------------- Make the course
1975: my $reply=&reply('encrypt:makeuser:'.$udom.':'.$uname.':none::',
1976: $ENV{'user.home'});
1977: unless ($reply eq 'ok') { return 'error: '.$reply; }
1978: $uhome=&homeserver($uname,$udom);
1979: if (($uhome eq '') || ($uhome eq 'no_host')) {
1980: return 'error: no such course';
1981: }
1982: &writecoursepref($udom.'_'.$uname,
1983: ('description' => $description,
1984: 'url' => $url));
1985: return '/'.$udom.'/'.$uname;
1986: }
1987:
1988: # ---------------------------------------------------------- Assign Custom Role
1989:
1990: sub assigncustomrole {
1991: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1992: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1993: $end,$start);
1994: }
1995:
1996: # ----------------------------------------------------------------- Revoke Role
1997:
1998: sub revokerole {
1999: my ($udom,$uname,$url,$role)=@_;
2000: my $now=time;
2001: return &assignrole($udom,$uname,$url,$role,$now);
2002: }
2003:
2004: # ---------------------------------------------------------- Revoke Custom Role
2005:
2006: sub revokecustomrole {
2007: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
2008: my $now=time;
2009: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
2010: }
2011:
2012: # ------------------------------------------------------------ Directory lister
2013:
2014: sub dirlist {
2015: my $uri=shift;
2016: $uri=~s/^\///;
2017: $uri=~s/\/$//;
2018: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
2019: if ($udom) {
2020: if ($uname) {
2021: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
2022: homeserver($uname,$udom));
2023: return split(/:/,$listing);
2024: } else {
2025: my $tryserver;
2026: my %allusers=();
2027: foreach $tryserver (keys %libserv) {
2028: if ($hostdom{$tryserver} eq $udom) {
2029: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
2030: $tryserver);
2031: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
2032: && ($listing ne 'con_lost')) {
2033: map {
2034: my ($entry,@stat)=split(/&/,$_);
2035: $allusers{$entry}=1;
2036: } split(/:/,$listing);
2037: }
2038: }
2039: }
2040: my $alluserstr='';
2041: map {
2042: $alluserstr.=$_.'&user:';
2043: } sort keys %allusers;
2044: $alluserstr=~s/:$//;
2045: return split(/:/,$alluserstr);
2046: }
2047: } else {
2048: my $tryserver;
2049: my %alldom=();
2050: foreach $tryserver (keys %libserv) {
2051: $alldom{$hostdom{$tryserver}}=1;
2052: }
2053: my $alldomstr='';
2054: map {
2055: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
2056: } sort keys %alldom;
2057: $alldomstr=~s/:$//;
2058: return split(/:/,$alldomstr);
2059: }
2060: }
2061:
2062: # -------------------------------------------------------- Value of a Condition
2063:
2064: sub directcondval {
2065: my $number=shift;
2066: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
2067: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
2068: } else {
2069: return 2;
2070: }
2071: }
2072:
2073: sub condval {
2074: my $condidx=shift;
2075: my $result=0;
2076: my $allpathcond='';
2077: map {
2078: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
2079: $allpathcond.=
2080: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
2081: }
2082: } split(/\|/,$condidx);
2083: $allpathcond=~s/\|$//;
2084: if ($ENV{'request.course.id'}) {
2085: if ($allpathcond) {
2086: my $operand='|';
2087: my @stack;
2088: map {
2089: if ($_ eq '(') {
2090: push @stack,($operand,$result)
2091: } elsif ($_ eq ')') {
2092: my $before=pop @stack;
2093: if (pop @stack eq '&') {
2094: $result=$result>$before?$before:$result;
2095: } else {
2096: $result=$result>$before?$result:$before;
2097: }
2098: } elsif (($_ eq '&') || ($_ eq '|')) {
2099: $operand=$_;
2100: } else {
2101: my $new=directcondval($_);
2102: if ($operand eq '&') {
2103: $result=$result>$new?$new:$result;
2104: } else {
2105: $result=$result>$new?$result:$new;
2106: }
2107: }
2108: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
2109: }
2110: }
2111: return $result;
2112: }
2113:
2114: # --------------------------------------------------------- Value of a Variable
2115:
2116: sub EXT {
2117: my ($varname,$symbparm)=@_;
2118: unless ($varname) { return ''; }
2119: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
2120: my $rest;
2121: if ($therest[0]) {
2122: $rest=join('.',@therest);
2123: } else {
2124: $rest='';
2125: }
2126: my $qualifierrest=$qualifier;
2127: if ($rest) { $qualifierrest.='.'.$rest; }
2128: my $spacequalifierrest=$space;
2129: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
2130: if ($realm eq 'user') {
2131: # --------------------------------------------------------------- user.resource
2132: if ($space eq 'resource') {
2133: my %restored=&restore();
2134: return $restored{$qualifierrest};
2135: # ----------------------------------------------------------------- user.access
2136: } elsif ($space eq 'access') {
2137: return &allowed($qualifier,$rest);
2138: # ------------------------------------------ user.preferences, user.environment
2139: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
2140: return $ENV{join('.',('environment',$qualifierrest))};
2141: # ----------------------------------------------------------------- user.course
2142: } elsif ($space eq 'course') {
2143: return $ENV{join('.',('request.course',$qualifier))};
2144: # ------------------------------------------------------------------- user.role
2145: } elsif ($space eq 'role') {
2146: my ($role,$where)=split(/\./,$ENV{'request.role'});
2147: if ($qualifier eq 'value') {
2148: return $role;
2149: } elsif ($qualifier eq 'extent') {
2150: return $where;
2151: }
2152: # ----------------------------------------------------------------- user.domain
2153: } elsif ($space eq 'domain') {
2154: return $ENV{'user.domain'};
2155: # ------------------------------------------------------------------- user.name
2156: } elsif ($space eq 'name') {
2157: return $ENV{'user.name'};
2158: # ---------------------------------------------------- Any other user namespace
2159: } else {
2160: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
2161: my %reply=&get($space,[$item]);
2162: return $reply{$item};
2163: }
2164: } elsif ($realm eq 'request') {
2165: # ------------------------------------------------------------- request.browser
2166: if ($space eq 'browser') {
2167: return $ENV{'browser.'.$qualifier};
2168: # ------------------------------------------------------------ request.filename
2169: } else {
2170: return $ENV{'request.'.$spacequalifierrest};
2171: }
2172: } elsif ($realm eq 'course') {
2173: # ---------------------------------------------------------- course.description
2174: return $ENV{'course.'.$ENV{'request.course.id'}.'.'.
2175: $spacequalifierrest};
2176: } elsif ($realm eq 'resource') {
2177: if ($ENV{'request.course.id'}) {
2178:
2179: # print '<br>'.$space.' - '.$qualifier.' - '.$spacequalifierrest;
2180:
2181:
2182: # ----------------------------------------------------- Cascading lookup scheme
2183: my $symbp;
2184: if ($symbparm) {
2185: $symbp=$symbparm;
2186: } else {
2187: $symbp=&symbread();
2188: }
2189: my $mapp=(split(/\_\_\_/,$symbp))[0];
2190:
2191: my $symbparm=$symbp.'.'.$spacequalifierrest;
2192: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
2193:
2194: my $seclevel=
2195: $ENV{'request.course.id'}.'.['.
2196: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
2197: my $seclevelr=
2198: $ENV{'request.course.id'}.'.['.
2199: $ENV{'request.course.sec'}.'].'.$symbparm;
2200: my $seclevelm=
2201: $ENV{'request.course.id'}.'.['.
2202: $ENV{'request.course.sec'}.'].'.$mapparm;
2203:
2204: my $courselevel=
2205: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
2206: my $courselevelr=
2207: $ENV{'request.course.id'}.'.'.$symbparm;
2208: my $courselevelm=
2209: $ENV{'request.course.id'}.'.'.$mapparm;
2210:
2211: # ----------------------------------------------------------- first, check user
2212: my %resourcedata=get('resourcedata',
2213: [$courselevelr,$courselevelm,$courselevel]);
2214: if (($resourcedata{$courselevelr}!~/^error\:/) &&
2215: ($resourcedata{$courselevelr}!~/^con_lost/)) {
2216:
2217: if ($resourcedata{$courselevelr}) {
2218: return $resourcedata{$courselevelr}; }
2219: if ($resourcedata{$courselevelm}) {
2220: return $resourcedata{$courselevelm}; }
2221: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
2222:
2223: } else {
2224: if ($resourcedata{$courselevelr}!~/No such file/) {
2225: &logthis("<font color=blue>WARNING:".
2226: " Trying to get resource data for ".$ENV{'user.name'}." at "
2227: .$ENV{'user.domain'}.": ".$resourcedata{$courselevelr}.
2228: "</font>");
2229: }
2230: }
2231:
2232: # -------------------------------------------------------- second, check course
2233:
2234: my $reply=&reply('get:'.
2235: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.':'.
2236: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2237: ':resourcedata:'.
2238: &escape($seclevelr).'&'.&escape($seclevelm).'&'.&escape($seclevel).'&'.
2239: &escape($courselevelr).'&'.&escape($courselevelm).'&'.&escape($courselevel),
2240: $ENV{'course.'.$ENV{'request.course.id'}.'.home'});
2241: if ($reply!~/^error\:/) {
2242: map {
2243: if ($_) { return &unescape($_); }
2244: } split(/\&/,$reply);
2245: }
2246: if (($reply=~/^con_lost/) || ($reply=~/^error\:/)) {
2247: &logthis("<font color=blue>WARNING:".
2248: " Getting ".$reply." asking for ".$varname." for ".
2249: $ENV{'course.'.$ENV{'request.course.id'}.'.num'}.
2250: ' at '.
2251: $ENV{'course.'.$ENV{'request.course.id'}.'.domain'}.
2252: ' from '.
2253: $ENV{'course.'.$ENV{'request.course.id'}.'.home'}.
2254: "</font>");
2255: }
2256: # ------------------------------------------------------ third, check map parms
2257: my %parmhash=();
2258: my $thisparm='';
2259: if (tie(%parmhash,'GDBM_File',
2260: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
2261: $thisparm=$parmhash{$symbparm};
2262: untie(%parmhash);
2263: }
2264: if ($thisparm) { return $thisparm; }
2265: }
2266:
2267: # --------------------------------------------- last, look in resource metadata
2268:
2269: $spacequalifierrest=~s/\./\_/;
2270: my $metadata=&metadata($ENV{'request.filename'},$spacequalifierrest);
2271: if ($metadata) { return $metadata; }
2272: $metadata=&metadata($ENV{'request.filename'},
2273: 'parameter_'.$spacequalifierrest);
2274: if ($metadata) { return $metadata; }
2275:
2276: # ------------------------------------------------------------------ Cascade up
2277:
2278: unless ($space eq '0') {
2279: my ($part,$id)=split(/\_/,$space);
2280: if ($id) {
2281: my $partgeneral=&EXT('resource.'.$part.'.'.$qualifierrest,
2282: $symbparm);
2283: if ($partgeneral) { return $partgeneral; }
2284: } else {
2285: my $resourcegeneral=&EXT('resource.0.'.$qualifierrest,
2286: $symbparm);
2287: if ($resourcegeneral) { return $resourcegeneral; }
2288: }
2289: }
2290:
2291: # ---------------------------------------------------- Any other user namespace
2292: } elsif ($realm eq 'environment') {
2293: # ----------------------------------------------------------------- environment
2294: return $ENV{'environment.'.$spacequalifierrest};
2295: } elsif ($realm eq 'system') {
2296: # ----------------------------------------------------------------- system.time
2297: if ($space eq 'time') {
2298: return time;
2299: }
2300: }
2301: return '';
2302: }
2303:
2304: # ---------------------------------------------------------------- Get metadata
2305:
2306: sub metadata {
2307: my ($uri,$what,$liburi,$prefix,$depthcount)=@_;
2308:
2309: $uri=&declutter($uri);
2310: my $filename=$uri;
2311: $uri=~s/\.meta$//;
2312: #
2313: # Is the metadata already cached?
2314: # Look at timestamp of caching
2315: # Everything is cached by the main uri, libraries are never directly cached
2316: #
2317: unless (abs($metacache{$uri.':cachedtimestamp'}-time)<600) {
2318: #
2319: # Is this a recursive call for a library?
2320: #
2321: if ($liburi) {
2322: $liburi=&declutter($liburi);
2323: $filename=$liburi;
2324: }
2325: my %metathesekeys=();
2326: unless ($filename=~/\.meta$/) { $filename.='.meta'; }
2327: my $metastring=&getfile($perlvar{'lonDocRoot'}.'/res/'.$filename);
2328: my $parser=HTML::TokeParser->new(\$metastring);
2329: my $token;
2330: undef %metathesekeys;
2331: while ($token=$parser->get_token) {
2332: if ($token->[0] eq 'S') {
2333: if (defined($token->[2]->{'package'})) {
2334: #
2335: # This is a package - get package info
2336: #
2337: my $package=$token->[2]->{'package'};
2338: my $keyroot='';
2339: if ($prefix) {
2340: $keyroot.='_'.$prefix;
2341: } else {
2342: if (defined($token->[2]->{'part'})) {
2343: $keyroot.='_'.$token->[2]->{'part'};
2344: }
2345: }
2346: if (defined($token->[2]->{'id'})) {
2347: $keyroot.='_'.$token->[2]->{'id'};
2348: }
2349: if ($metacache{$uri.':packages'}) {
2350: $metacache{$uri.':packages'}.=','.$package.$keyroot;
2351: } else {
2352: $metacache{$uri.':packages'}=$package.$keyroot;
2353: }
2354: map {
2355: if ($_=~/^$package\&/) {
2356: my ($pack,$name,$subp)=split(/\&/,$_);
2357: my $value=$packagetab{$_};
2358: my $part=$keyroot;
2359: $part=~s/^\_//;
2360: if ($subp eq 'display') {
2361: $value.=' [Part: '.$part.']';
2362: }
2363: my $unikey='parameter'.$keyroot.'_'.$name;
2364: $metathesekeys{$unikey}=1;
2365: $metacache{$uri.':'.$unikey.'.part'}=$part;
2366: unless
2367: (defined($metacache{$uri.':'.$unikey.'.'.$subp})) {
2368: $metacache{$uri.':'.$unikey.'.'.$subp}=$value;
2369: }
2370: }
2371: } keys %packagetab;
2372: } else {
2373: #
2374: # This is not a package - some other kind of start tag
2375: #
2376: my $entry=$token->[1];
2377: my $unikey;
2378: if ($entry eq 'import') {
2379: $unikey='';
2380: } else {
2381: $unikey=$entry;
2382: }
2383: if ($prefix) {
2384: $unikey.=$prefix;
2385: } else {
2386: if (defined($token->[2]->{'part'})) {
2387: $unikey.='_'.$token->[2]->{'part'};
2388: }
2389: }
2390: if (defined($token->[2]->{'id'})) {
2391: $unikey.='_'.$token->[2]->{'id'};
2392: }
2393:
2394: if ($entry eq 'import') {
2395: #
2396: # Importing a library here
2397: #
2398: if (defined($depthcount)) { $depthcount++; } else
2399: { $depthcount=0; }
2400: if ($depthcount<20) {
2401: map {
2402: $metathesekeys{$_}=1;
2403: } split(/\,/,&metadata($uri,'keys',
2404: $parser->get_text('/import'),$unikey,
2405: $depthcount));
2406: }
2407: } else {
2408:
2409: if (defined($token->[2]->{'name'})) {
2410: $unikey.='_'.$token->[2]->{'name'};
2411: }
2412: $metathesekeys{$unikey}=1;
2413: map {
2414: $metacache{$uri.':'.$unikey.'.'.$_}=$token->[2]->{$_};
2415: } @{$token->[3]};
2416: unless (
2417: $metacache{$uri.':'.$unikey}=$parser->get_text('/'.$entry)
2418: ) { $metacache{$uri.':'.$unikey}=
2419: $metacache{$uri.':'.$unikey.'.default'};
2420: }
2421: # end of not-a-package not-a-library import
2422: }
2423: # end of not-a-package start tag
2424: }
2425: # the next is the end of "start tag"
2426: }
2427: }
2428: $metacache{$uri.':keys'}=join(',',keys %metathesekeys);
2429: $metacache{$uri.':cachedtimestamp'}=time;
2430: # this is the end of "was not already recently cached
2431: }
2432: return $metacache{$uri.':'.$what};
2433: }
2434:
2435: # ------------------------------------------------- Update symbolic store links
2436:
2437: sub symblist {
2438: my ($mapname,%newhash)=@_;
2439: $mapname=declutter($mapname);
2440: my %hash;
2441: if (($ENV{'request.course.fn'}) && (%newhash)) {
2442: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2443: &GDBM_WRCREAT,0640)) {
2444: map {
2445: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
2446: } keys %newhash;
2447: if (untie(%hash)) {
2448: return 'ok';
2449: }
2450: }
2451: }
2452: return 'error';
2453: }
2454:
2455: # ------------------------------------------------------ Return symb list entry
2456:
2457: sub symbread {
2458: my $thisfn=shift;
2459: unless ($thisfn) {
2460: if ($ENV{'request.symb'}) { return $ENV{'request.symb'}; }
2461: $thisfn=$ENV{'request.filename'};
2462: }
2463: $thisfn=declutter($thisfn);
2464: my %hash;
2465: my %bighash;
2466: my $syval='';
2467: if (($ENV{'request.course.fn'}) && ($thisfn)) {
2468: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
2469: &GDBM_READER,0640)) {
2470: $syval=$hash{$thisfn};
2471: untie(%hash);
2472: }
2473: # ---------------------------------------------------------- There was an entry
2474: if ($syval) {
2475: unless ($syval=~/\_\d+$/) {
2476: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
2477: &appenv('request.ambiguous' => $thisfn);
2478: return '';
2479: }
2480: $syval.=$1;
2481: }
2482: } else {
2483: # ------------------------------------------------------- Was not in symb table
2484: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
2485: &GDBM_READER,0640)) {
2486: # ---------------------------------------------- Get ID(s) for current resource
2487: my $ids=$bighash{'ids_/res/'.$thisfn};
2488: unless ($ids) {
2489: $ids=$bighash{'ids_/'.$thisfn};
2490: }
2491: if ($ids) {
2492: # ------------------------------------------------------------------- Has ID(s)
2493: my @possibilities=split(/\,/,$ids);
2494: if ($#possibilities==0) {
2495: # ----------------------------------------------- There is only one possibility
2496: my ($mapid,$resid)=split(/\./,$ids);
2497: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
2498: } else {
2499: # ------------------------------------------ There is more than one possibility
2500: my $realpossible=0;
2501: map {
2502: my $file=$bighash{'src_'.$_};
2503: if (&allowed('bre',$file)) {
2504: my ($mapid,$resid)=split(/\./,$_);
2505: if ($bighash{'map_type_'.$mapid} ne 'page') {
2506: $realpossible++;
2507: $syval=declutter($bighash{'map_id_'.$mapid}).
2508: '___'.$resid;
2509: }
2510: }
2511: } @possibilities;
2512: if ($realpossible!=1) { $syval=''; }
2513: }
2514: }
2515: untie(%bighash)
2516: }
2517: }
2518: if ($syval) {
2519: return $syval.'___'.$thisfn;
2520: }
2521: }
2522: &appenv('request.ambiguous' => $thisfn);
2523: return '';
2524: }
2525:
2526: # ---------------------------------------------------------- Return random seed
2527:
2528: sub numval {
2529: my $txt=shift;
2530: $txt=~tr/A-J/0-9/;
2531: $txt=~tr/a-j/0-9/;
2532: $txt=~tr/K-T/0-9/;
2533: $txt=~tr/k-t/0-9/;
2534: $txt=~tr/U-Z/0-5/;
2535: $txt=~tr/u-z/0-5/;
2536: $txt=~s/\D//g;
2537: return int($txt);
2538: }
2539:
2540: sub rndseed {
2541: my ($symb,$courseid,$domain,$username)=@_;
2542: if (!$symb) {
2543: unless ($symb=&symbread()) { return time; }
2544: }
2545: if (!$courseid) { $courseid=$ENV{'request.course.id'};}
2546: if (!$domain) {$domain=$ENV{'user.domain'};}
2547: if (!$username) {$username=$ENV{'user.name'};}
2548: {
2549: use integer;
2550: my $symbchck=unpack("%32C*",$symb) << 27;
2551: my $symbseed=numval($symb) << 22;
2552: my $namechck=unpack("%32C*",$username) << 17;
2553: my $nameseed=numval($username) << 12;
2554: my $domainseed=unpack("%32C*",$domain) << 7;
2555: my $courseseed=unpack("%32C*",$courseid);
2556: my $num=$symbseed+$nameseed+$domainseed+$courseseed+$namechck+$symbchck;
2557: #uncommenting these lines can break things!
2558: #&Apache::lonxml::debug("$symbseed:$nameseed;$domainseed|$courseseed;$namechck:$symbchck");
2559: #&Apache::lonxml::debug("rndseed :$num:$symb");
2560: return $num;
2561: }
2562: }
2563:
2564: sub ireceipt {
2565: my ($funame,$fudom,$fucourseid,$fusymb)=@_;
2566: my $cuname=unpack("%32C*",$funame);
2567: my $cudom=unpack("%32C*",$fudom);
2568: my $cucourseid=unpack("%32C*",$fucourseid);
2569: my $cusymb=unpack("%32C*",$fusymb);
2570: my $cunique=unpack("%32C*",$perlvar{'lonReceipt'});
2571: return unpack("%32C*",$perlvar{'lonHostID'}).'-'.
2572: ($cunique%$cuname+
2573: $cunique%$cudom+
2574: $cusymb%$cuname+
2575: $cusymb%$cudom+
2576: $cucourseid%$cuname+
2577: $cucourseid%$cudom);
2578: }
2579:
2580: sub receipt {
2581: return &ireceipt($ENV{'user.name'},$ENV{'user.domain'},
2582: $ENV{'request.course.id'},&symbread());
2583: }
2584:
2585: # ------------------------------------------------------------ Serves up a file
2586: # returns either the contents of the file or a -1
2587: sub getfile {
2588: my $file=shift;
2589: &repcopy($file);
2590: if (! -e $file ) { return -1; };
2591: my $fh=Apache::File->new($file);
2592: my $a='';
2593: while (<$fh>) { $a .=$_; }
2594: return $a
2595: }
2596:
2597: sub filelocation {
2598: my ($dir,$file) = @_;
2599: my $location;
2600: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
2601: if ($file=~m:^/~:) { # is a contruction space reference
2602: $location = $file;
2603: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
2604: } else {
2605: $file=~s/^$perlvar{'lonDocRoot'}//;
2606: $file=~s:^/*res::;
2607: if ( !( $file =~ m:^/:) ) {
2608: $location = $dir. '/'.$file;
2609: } else {
2610: $location = '/home/httpd/html/res'.$file;
2611: }
2612: }
2613: $location=~s://+:/:g; # remove duplicate /
2614: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
2615: return $location;
2616: }
2617:
2618: sub hreflocation {
2619: my ($dir,$file)=@_;
2620: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
2621: my $finalpath=filelocation($dir,$file);
2622: $finalpath=~s/^\/home\/httpd\/html//;
2623: return $finalpath;
2624: } else {
2625: return $file;
2626: }
2627: }
2628:
2629: # ------------------------------------------------------------- Declutters URLs
2630:
2631: sub declutter {
2632: my $thisfn=shift;
2633: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
2634: $thisfn=~s/^\///;
2635: $thisfn=~s/^res\///;
2636: return $thisfn;
2637: }
2638:
2639: # -------------------------------------------------------- Escape Special Chars
2640:
2641: sub escape {
2642: my $str=shift;
2643: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
2644: return $str;
2645: }
2646:
2647: # ----------------------------------------------------- Un-Escape Special Chars
2648:
2649: sub unescape {
2650: my $str=shift;
2651: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
2652: return $str;
2653: }
2654:
2655: # ================================================================ Main Program
2656:
2657: sub goodbye {
2658: &flushcourselogs();
2659: &logthis("Shutting down");
2660: }
2661:
2662: BEGIN {
2663: # ------------------------------------------------------------ Read access.conf
2664: {
2665: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
2666:
2667: while (my $configline=<$config>) {
2668: if ($configline =~ /PerlSetVar/) {
2669: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
2670: chomp($varvalue);
2671: $perlvar{$varname}=$varvalue;
2672: }
2673: }
2674: }
2675:
2676: # ------------------------------------------------------------- Read hosts file
2677: {
2678: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
2679:
2680: while (my $configline=<$config>) {
2681: chomp($configline);
2682: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
2683: $hostname{$id}=$name;
2684: $hostdom{$id}=$domain;
2685: $hostip{$id}=$ip;
2686: if ($role eq 'library') { $libserv{$id}=$name; }
2687: }
2688: }
2689:
2690: # ------------------------------------------------------ Read spare server file
2691: {
2692: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
2693:
2694: while (my $configline=<$config>) {
2695: chomp($configline);
2696: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
2697: $spareid{$configline}=1;
2698: }
2699: }
2700: }
2701: # ------------------------------------------------------------ Read permissions
2702: {
2703: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
2704:
2705: while (my $configline=<$config>) {
2706: chomp($configline);
2707: if ($configline) {
2708: my ($role,$perm)=split(/ /,$configline);
2709: if ($perm ne '') { $pr{$role}=$perm; }
2710: }
2711: }
2712: }
2713:
2714: # -------------------------------------------- Read plain texts for permissions
2715: {
2716: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
2717:
2718: while (my $configline=<$config>) {
2719: chomp($configline);
2720: if ($configline) {
2721: my ($short,$plain)=split(/:/,$configline);
2722: if ($plain ne '') { $prp{$short}=$plain; }
2723: }
2724: }
2725: }
2726:
2727: # ---------------------------------------------------------- Read package table
2728: {
2729: my $config=Apache::File->new("$perlvar{'lonTabDir'}/packages.tab");
2730:
2731: while (my $configline=<$config>) {
2732: chomp($configline);
2733: my ($short,$plain)=split(/:/,$configline);
2734: my ($pack,$name)=split(/\&/,$short);
2735: if ($plain ne '') {
2736: $packagetab{$pack.'&'.$name.'&name'}=$name;
2737: $packagetab{$short}=$plain;
2738: }
2739: }
2740: }
2741:
2742: # ------------------------------------------------------------- Read file types
2743: {
2744: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
2745:
2746: while (my $configline=<$config>) {
2747: next if ($configline =~ /^\#/);
2748: chomp($configline);
2749: my ($ending,$emb,@descr)=split(/\s+/,$configline);
2750: if ($descr[0] ne '') {
2751: $fe{$ending}=lc($emb);
2752: $fd{$ending}=join(' ',@descr);
2753: }
2754: }
2755: }
2756:
2757: %metacache=();
2758:
2759: $processmarker=$$.'_'.time.'_'.$perlvar{'lonHostID'};
2760: $dumpcount=0;
2761:
2762: &logtouch();
2763: &logthis('<font color=yellow>INFO: Read configuration</font>');
2764: }
2765:
2766: 1;
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