1: # The LearningOnline Network
2: # TCP networking package
3: #
4: # Functions for use by content handlers:
5: #
6: # plaintext(short) : plain text explanation of short term
7: # fileembstyle(ext) : embed style in page for file extension
8: # filedescription(ext) : descriptor text for file extension
9: # allowed(short,url) : returns codes for allowed actions
10: # F: full access
11: # U,I,K: authentication modes (cxx only)
12: # '': forbidden
13: # 1: user needs to choose course
14: # 2: browse allowed
15: # definerole(rolename,sys,dom,cou) : define a custom role rolename
16: # set priviledges in format of lonTabs/roles.tab for
17: # system, domain and course level,
18: # assignrole(udom,uname,url,role,end,start) : give a role to a user for the
19: # level given by url. Optional start and end dates
20: # (leave empty string or zero for "no date")
21: # assigncustomrole (udom,uname,url,rdom,rnam,rolename,end,start) : give a
22: # custom role to a user for the level given by url.
23: # Specify name and domain of role author, and role name
24: # revokerole (udom,uname,url,role) : Revoke a role for url
25: # revokecustomrole (udom,uname,url,rdom,rnam,rolename) : Revoke a custom role
26: # appenv(hash) : adds hash to session environment
27: # delenv(varname) : deletes all environment entries starting with varname
28: # store(hash) : stores hash permanently for this url
29: # cstore(hash) : critical store
30: # restore : returns hash for this url
31: # eget(namesp,array) : returns hash with keys from array filled in from namesp
32: # get(namesp,array) : returns hash with keys from array filled in from namesp
33: # del(namesp,array) : deletes keys out of array from namesp
34: # put(namesp,hash) : stores hash in namesp
35: # cput(namesp,hash) : critical put
36: # dump(namesp) : dumps the complete namespace into a hash
37: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
38: # hash
39: # coursedescription(id) : returns and caches course description for id
40: # repcopy(filename) : replicate file
41: # dirlist(url) : gets a directory listing
42: # directcondval(index) : reading condition value of single condition from
43: # state string
44: # condval(index) : value of condition index based on state
45: # EXT(name) : value of a variable
46: # symblist(map,hash) : Updates symbolic storage links
47: # symbread([filename]) : returns the data handle (filename optional)
48: # rndseed() : returns a random seed
49: # getfile(filename) : returns the contents of filename, or a -1 if it can't
50: # be found, replicates and subscribes to the file
51: # filelocation(dir,file) : returns a farily clean absolute reference to file
52: # from the directory dir
53: # hreflocation(dir,file) : same as filelocation, but for hrefs
54: # log(domain,user,home,msg) : write to permanent log for user
55: #
56: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
57: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
58: # 11/8,11/16,11/18,11/22,11/23,12/22,
59: # 01/06,01/13,02/24,02/28,02/29,
60: # 03/01,03/02,03/06,03/07,03/13,
61: # 04/05,05/29,05/31,06/01,
62: # 06/05,06/26 Gerd Kortemeyer
63: # 06/26 Ben Tyszka
64: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
65: # 08/14 Ben Tyszka
66: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05,09/25,09/28,09/30 Gerd Kortemeyer
67: # 10/04 Gerd Kortemeyer
68: # 10/04 Guy Albertelli
69: # 10/06,10/09,10/10,10/11,10/14,10/20,10/23,10/25,10/26,10/27,10/28,10/29,
70: # 10/30,10/31,11/2,11/14,11/15,11/16,11/20,11/21,11/22,11/25 Gerd Kortemeyer
71:
72: package Apache::lonnet;
73:
74: use strict;
75: use Apache::File;
76: use LWP::UserAgent();
77: use HTTP::Headers;
78: use vars
79: qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit);
80: use IO::Socket;
81: use GDBM_File;
82: use Apache::Constants qw(:common :http);
83:
84: # --------------------------------------------------------------------- Logging
85:
86: sub logthis {
87: my $message=shift;
88: my $execdir=$perlvar{'lonDaemons'};
89: my $now=time;
90: my $local=localtime($now);
91: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
92: print $fh "$local ($$): $message\n";
93: return 1;
94: }
95:
96: sub logperm {
97: my $message=shift;
98: my $execdir=$perlvar{'lonDaemons'};
99: my $now=time;
100: my $local=localtime($now);
101: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
102: print $fh "$now:$message:$local\n";
103: return 1;
104: }
105:
106: # -------------------------------------------------- Non-critical communication
107: sub subreply {
108: my ($cmd,$server)=@_;
109: my $peerfile="$perlvar{'lonSockDir'}/$server";
110: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
111: Type => SOCK_STREAM,
112: Timeout => 10)
113: or return "con_lost";
114: print $client "$cmd\n";
115: my $answer=<$client>;
116: if (!$answer) { $answer="con_lost"; }
117: chomp($answer);
118: return $answer;
119: }
120:
121: sub reply {
122: my ($cmd,$server)=@_;
123: my $answer=subreply($cmd,$server);
124: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
125: if (($answer=~/^refused/) || ($answer=~/^rejected/)) {
126: &logthis("<font color=blue>WARNING:".
127: " $cmd to $server returned $answer</font>");
128: }
129: return $answer;
130: }
131:
132: # ----------------------------------------------------------- Send USR1 to lonc
133:
134: sub reconlonc {
135: my $peerfile=shift;
136: &logthis("Trying to reconnect for $peerfile");
137: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
138: if (my $fh=Apache::File->new("$loncfile")) {
139: my $loncpid=<$fh>;
140: chomp($loncpid);
141: if (kill 0 => $loncpid) {
142: &logthis("lonc at pid $loncpid responding, sending USR1");
143: kill USR1 => $loncpid;
144: sleep 1;
145: if (-e "$peerfile") { return; }
146: &logthis("$peerfile still not there, give it another try");
147: sleep 5;
148: if (-e "$peerfile") { return; }
149: &logthis(
150: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
151: } else {
152: &logthis(
153: "<font color=blue>WARNING:".
154: " lonc at pid $loncpid not responding, giving up</font>");
155: }
156: } else {
157: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
158: }
159: }
160:
161: # ------------------------------------------------------ Critical communication
162:
163: sub critical {
164: my ($cmd,$server)=@_;
165: my $answer=reply($cmd,$server);
166: if ($answer eq 'con_lost') {
167: my $pingreply=reply('ping',$server);
168: &reconlonc("$perlvar{'lonSockDir'}/$server");
169: my $pongreply=reply('pong',$server);
170: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
171: $answer=reply($cmd,$server);
172: if ($answer eq 'con_lost') {
173: my $now=time;
174: my $middlename=$cmd;
175: $middlename=substr($middlename,0,16);
176: $middlename=~s/\W//g;
177: my $dfilename=
178: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
179: {
180: my $dfh;
181: if ($dfh=Apache::File->new(">$dfilename")) {
182: print $dfh "$cmd\n";
183: }
184: }
185: sleep 2;
186: my $wcmd='';
187: {
188: my $dfh;
189: if ($dfh=Apache::File->new("$dfilename")) {
190: $wcmd=<$dfh>;
191: }
192: }
193: chomp($wcmd);
194: if ($wcmd eq $cmd) {
195: &logthis("<font color=blue>WARNING: ".
196: "Connection buffer $dfilename: $cmd</font>");
197: &logperm("D:$server:$cmd");
198: return 'con_delayed';
199: } else {
200: &logthis("<font color=red>CRITICAL:"
201: ." Critical connection failed: $server $cmd</font>");
202: &logperm("F:$server:$cmd");
203: return 'con_failed';
204: }
205: }
206: }
207: return $answer;
208: }
209:
210: # ---------------------------------------------------------- Append Environment
211:
212: sub appenv {
213: my %newenv=@_;
214: map {
215: if (($newenv{$_}=~/^user\.role/) || ($newenv{$_}=~/^user\.priv/)) {
216: &logthis("<font color=blue>WARNING: ".
217: "Attempt to modify environment ".$_." to ".$newenv{$_});
218: delete($newenv{$_});
219: } else {
220: $ENV{$_}=$newenv{$_};
221: }
222: } keys %newenv;
223: my @oldenv;
224: {
225: my $fh;
226: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
227: return 'error';
228: }
229: @oldenv=<$fh>;
230: }
231: for (my $i=0; $i<=$#oldenv; $i++) {
232: chomp($oldenv[$i]);
233: if ($oldenv[$i] ne '') {
234: my ($name,$value)=split(/=/,$oldenv[$i]);
235: unless (defined($newenv{$name})) {
236: $newenv{$name}=$value;
237: }
238: }
239: }
240: {
241: my $fh;
242: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
243: return 'error';
244: }
245: my $newname;
246: foreach $newname (keys %newenv) {
247: print $fh "$newname=$newenv{$newname}\n";
248: }
249: }
250: return 'ok';
251: }
252: # ----------------------------------------------------- Delete from Environment
253:
254: sub delenv {
255: my $delthis=shift;
256: my %newenv=();
257: if (($delthis=~/user\.role/) || ($delthis=~/user\.priv/)) {
258: &logthis("<font color=blue>WARNING: ".
259: "Attempt to delete from environment ".$delthis);
260: return 'error';
261: }
262: my @oldenv;
263: {
264: my $fh;
265: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
266: return 'error';
267: }
268: @oldenv=<$fh>;
269: }
270: {
271: my $fh;
272: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
273: return 'error';
274: }
275: map {
276: unless ($_=~/^$delthis/) { print $fh $_; }
277: } @oldenv;
278: }
279: return 'ok';
280: }
281:
282: # ------------------------------ Find server with least workload from spare.tab
283:
284: sub spareserver {
285: my $tryserver;
286: my $spareserver='';
287: my $lowestserver=100;
288: foreach $tryserver (keys %spareid) {
289: my $answer=reply('load',$tryserver);
290: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
291: $spareserver="http://$hostname{$tryserver}";
292: $lowestserver=$answer;
293: }
294: }
295: return $spareserver;
296: }
297:
298: # --------- Try to authenticate user from domain's lib servers (first this one)
299:
300: sub authenticate {
301: my ($uname,$upass,$udom)=@_;
302: $upass=escape($upass);
303: if (($perlvar{'lonRole'} eq 'library') &&
304: ($udom eq $perlvar{'lonDefDomain'})) {
305: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
306: if ($answer =~ /authorized/) {
307: if ($answer eq 'authorized') {
308: &logthis("User $uname at $udom authorized by local server");
309: return $perlvar{'lonHostID'};
310: }
311: if ($answer eq 'non_authorized') {
312: &logthis("User $uname at $udom rejected by local server");
313: return 'no_host';
314: }
315: }
316: }
317:
318: my $tryserver;
319: foreach $tryserver (keys %libserv) {
320: if ($hostdom{$tryserver} eq $udom) {
321: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
322: if ($answer =~ /authorized/) {
323: if ($answer eq 'authorized') {
324: &logthis("User $uname at $udom authorized by $tryserver");
325: return $tryserver;
326: }
327: if ($answer eq 'non_authorized') {
328: &logthis("User $uname at $udom rejected by $tryserver");
329: return 'no_host';
330: }
331: }
332: }
333: }
334: &logthis("User $uname at $udom could not be authenticated");
335: return 'no_host';
336: }
337:
338: # ---------------------- Find the homebase for a user from domain's lib servers
339:
340: sub homeserver {
341: my ($uname,$udom)=@_;
342:
343: my $index="$uname:$udom";
344: if ($homecache{$index}) { return "$homecache{$index}"; }
345:
346: my $tryserver;
347: foreach $tryserver (keys %libserv) {
348: if ($hostdom{$tryserver} eq $udom) {
349: my $answer=reply("home:$udom:$uname",$tryserver);
350: if ($answer eq 'found') {
351: $homecache{$index}=$tryserver;
352: return $tryserver;
353: }
354: }
355: }
356: return 'no_host';
357: }
358:
359: # ----------------------------- Subscribe to a resource, return URL if possible
360:
361: sub subscribe {
362: my $fname=shift;
363: my $author=$fname;
364: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
365: my ($udom,$uname)=split(/\//,$author);
366: my $home=homeserver($uname,$udom);
367: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
368: return 'not_found';
369: }
370: my $answer=reply("sub:$fname",$home);
371: if (($answer eq 'con_lost') || ($answer eq 'rejected')) {
372: $answer.=' by '.$home;
373: }
374: return $answer;
375: }
376:
377: # -------------------------------------------------------------- Replicate file
378:
379: sub repcopy {
380: my $filename=shift;
381: $filename=~s/\/+/\//g;
382: my $transname="$filename.in.transfer";
383: if ((-e $filename) || (-e $transname)) { return OK; }
384: my $remoteurl=subscribe($filename);
385: if ($remoteurl =~ /^con_lost by/) {
386: &logthis("Subscribe returned $remoteurl: $filename");
387: return HTTP_SERVICE_UNAVAILABLE;
388: } elsif ($remoteurl eq 'not_found') {
389: &logthis("Subscribe returned not_found: $filename");
390: return HTTP_NOT_FOUND;
391: } elsif ($remoteurl =~ /^rejected by/) {
392: &logthis("Subscribe returned $remoteurl: $filename");
393: return FORBIDDEN;
394: } elsif ($remoteurl eq 'directory') {
395: return OK;
396: } else {
397: my @parts=split(/\//,$filename);
398: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
399: if ($path ne "$perlvar{'lonDocRoot'}/res") {
400: &logthis("Malconfiguration for replication: $filename");
401: return HTTP_BAD_REQUEST;
402: }
403: my $count;
404: for ($count=5;$count<$#parts;$count++) {
405: $path.="/$parts[$count]";
406: if ((-e $path)!=1) {
407: mkdir($path,0777);
408: }
409: }
410: my $ua=new LWP::UserAgent;
411: my $request=new HTTP::Request('GET',"$remoteurl");
412: my $response=$ua->request($request,$transname);
413: if ($response->is_error()) {
414: unlink($transname);
415: my $message=$response->status_line;
416: &logthis("<font color=blue>WARNING:"
417: ." LWP get: $message: $filename</font>");
418: return HTTP_SERVICE_UNAVAILABLE;
419: } else {
420: if ($remoteurl!~/\.meta$/) {
421: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
422: my $mresponse=$ua->request($mrequest,$filename.'.meta');
423: if ($mresponse->is_error()) {
424: unlink($filename.'.meta');
425: &logthis(
426: "<font color=yellow>INFO: No metadata: $filename</font>");
427: }
428: }
429: rename($transname,$filename);
430: return OK;
431: }
432: }
433: }
434:
435: # --------------------------------------------------------- Server Side Include
436:
437: sub ssi {
438:
439: my ($fn,%form)=@_;
440:
441: my $ua=new LWP::UserAgent;
442:
443: my $request;
444:
445: if (%form) {
446: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
447: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
448: } else {
449: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
450: }
451:
452: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
453: my $response=$ua->request($request);
454:
455: return $response->content;
456: }
457:
458: # ------------------------------------------------------------------------- Log
459:
460: sub log {
461: my ($dom,$nam,$hom,$what)=@_;
462: return critical("log:$dom:$nam:$what",$hom);
463: }
464:
465: # ----------------------------------------------------------------------- Store
466:
467: sub store {
468: my %storehash=@_;
469: my $symb;
470: unless ($symb=escape(&symbread())) { return ''; }
471: my $namespace;
472: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
473: my $namevalue='';
474: map {
475: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
476: } keys %storehash;
477: $namevalue=~s/\&$//;
478: return reply(
479: "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
480: "$ENV{'user.home'}");
481: }
482:
483: # -------------------------------------------------------------- Critical Store
484:
485: sub cstore {
486: my %storehash=@_;
487: my $symb;
488: unless ($symb=escape(&symbread())) { return ''; }
489: my $namespace;
490: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
491: my $namevalue='';
492: map {
493: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
494: } keys %storehash;
495: $namevalue=~s/\&$//;
496: return critical(
497: "store:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb:$namevalue",
498: "$ENV{'user.home'}");
499: }
500:
501: # --------------------------------------------------------------------- Restore
502:
503: sub restore {
504: my $symb;
505: unless ($symb=escape(&symbread())) { return ''; }
506: my $namespace;
507: unless ($namespace=$ENV{'request.course.id'}) { return ''; }
508: my $answer=reply(
509: "restore:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$symb",
510: "$ENV{'user.home'}");
511: my %returnhash=();
512: map {
513: my ($name,$value)=split(/\=/,$_);
514: $returnhash{&unescape($name)}=&unescape($value);
515: } split(/\&/,$answer);
516: map {
517: $returnhash{$_}=$returnhash{$returnhash{'version'}.':'.$_};
518: } split(/\:/,$returnhash{$returnhash{'version'}.':keys'});
519: return %returnhash;
520: }
521:
522: # ---------------------------------------------------------- Course Description
523:
524: sub coursedescription {
525: my $courseid=shift;
526: $courseid=~s/^\///;
527: $courseid=~s/\_/\//g;
528: my ($cdomain,$cnum)=split(/\//,$courseid);
529: my $chome=homeserver($cnum,$cdomain);
530: if ($chome ne 'no_host') {
531: my $rep=reply("dump:$cdomain:$cnum:environment",$chome);
532: if ($rep ne 'con_lost') {
533: my $normalid=$courseid;
534: $normalid=~s/\//\_/g;
535: my %envhash=();
536: my %returnhash=('home' => $chome,
537: 'domain' => $cdomain,
538: 'num' => $cnum);
539: map {
540: my ($name,$value)=split(/\=/,$_);
541: $name=&unescape($name);
542: $value=&unescape($value);
543: $returnhash{$name}=$value;
544: $envhash{'course.'.$normalid.'.'.$name}=$value;
545: } split(/\&/,$rep);
546: $returnhash{'url'}='/res/'.declutter($returnhash{'url'});
547: $returnhash{'fn'}=$perlvar{'lonDaemons'}.'/tmp/'.
548: $ENV{'user.name'}.'_'.$cdomain.'_'.$cnum;
549: $envhash{'course.'.$normalid.'.last_cache'}=time;
550: $envhash{'course.'.$normalid.'.home'}=$chome;
551: $envhash{'course.'.$normalid.'.domain'}=$cdomain;
552: $envhash{'course.'.$normalid.'.num'}=$cnum;
553: &appenv(%envhash);
554: return %returnhash;
555: }
556: }
557: return ();
558: }
559:
560: # -------------------------------------------------------- Get user priviledges
561:
562: sub rolesinit {
563: my ($domain,$username,$authhost)=@_;
564: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
565: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
566: my %allroles=();
567: my %thesepriv=();
568: my $now=time;
569: my $userroles="user.login.time=$now\n";
570: my $thesestr;
571:
572: if ($rolesdump ne '') {
573: map {
574: if ($_!~/^rolesdef\&/) {
575: my ($area,$role)=split(/=/,$_);
576: $area=~s/\_\w\w$//;
577: my ($trole,$tend,$tstart)=split(/_/,$role);
578: $userroles.='user.role.'.$trole.'.'.$area.'='.
579: $tstart.'.'.$tend."\n";
580: if ($tend!=0) {
581: if ($tend<$now) {
582: $trole='';
583: }
584: }
585: if ($tstart!=0) {
586: if ($tstart>$now) {
587: $trole='';
588: }
589: }
590: if (($area ne '') && ($trole ne '')) {
591: my $spec=$trole.'.'.$area;
592: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
593: if ($trole =~ /^cr\//) {
594: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
595: my $homsvr=homeserver($rauthor,$rdomain);
596: if ($hostname{$homsvr} ne '') {
597: my $roledef=
598: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
599: $homsvr);
600: if (($roledef ne 'con_lost') && ($roledef ne '')) {
601: my ($syspriv,$dompriv,$coursepriv)=
602: split(/\_/,unescape($roledef));
603: $allroles{'cm./'}.=':'.$syspriv;
604: $allroles{$spec.'./'}.=':'.$syspriv;
605: if ($tdomain ne '') {
606: $allroles{'cm./'.$tdomain.'/'}.=':'.$dompriv;
607: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$dompriv;
608: if ($trest ne '') {
609: $allroles{'cm.'.$area}.=':'.$coursepriv;
610: $allroles{$spec.'.'.$area}.=':'.$coursepriv;
611: }
612: }
613: }
614: }
615: } else {
616: $allroles{'cm./'}.=':'.$pr{$trole.':s'};
617: $allroles{$spec.'./'}.=':'.$pr{$trole.':s'};
618: if ($tdomain ne '') {
619: $allroles{'cm./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
620: $allroles{$spec.'./'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
621: if ($trest ne '') {
622: $allroles{'cm.'.$area}.=':'.$pr{$trole.':c'};
623: $allroles{$spec.'.'.$area}.=':'.$pr{$trole.':c'};
624: }
625: }
626: }
627: }
628: }
629: } split(/&/,$rolesdump);
630: map {
631: %thesepriv=();
632: map {
633: if ($_ ne '') {
634: my ($priviledge,$restrictions)=split(/&/,$_);
635: if ($restrictions eq '') {
636: $thesepriv{$priviledge}='F';
637: } else {
638: if ($thesepriv{$priviledge} ne 'F') {
639: $thesepriv{$priviledge}.=$restrictions;
640: }
641: }
642: }
643: } split(/:/,$allroles{$_});
644: $thesestr='';
645: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
646: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
647: } keys %allroles;
648: }
649: return $userroles;
650: }
651:
652: # --------------------------------------------------------------- get interface
653:
654: sub get {
655: my ($namespace,@storearr)=@_;
656: my $items='';
657: map {
658: $items.=escape($_).'&';
659: } @storearr;
660: $items=~s/\&$//;
661: my $rep=reply("get:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
662: $ENV{'user.home'});
663: my @pairs=split(/\&/,$rep);
664: my %returnhash=();
665: my $i=0;
666: map {
667: $returnhash{$_}=unescape($pairs[$i]);
668: $i++;
669: } @storearr;
670: return %returnhash;
671: }
672:
673: # --------------------------------------------------------------- del interface
674:
675: sub del {
676: my ($namespace,@storearr)=@_;
677: my $items='';
678: map {
679: $items.=escape($_).'&';
680: } @storearr;
681: $items=~s/\&$//;
682: return reply("del:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
683: $ENV{'user.home'});
684: }
685:
686: # -------------------------------------------------------------- dump interface
687:
688: sub dump {
689: my $namespace=shift;
690: my $rep=reply("dump:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace",
691: $ENV{'user.home'});
692: my @pairs=split(/\&/,$rep);
693: my %returnhash=();
694: map {
695: my ($key,$value)=split(/=/,$_);
696: $returnhash{unescape($key)}=unescape($value);
697: } @pairs;
698: return %returnhash;
699: }
700:
701: # --------------------------------------------------------------- put interface
702:
703: sub put {
704: my ($namespace,%storehash)=@_;
705: my $items='';
706: map {
707: $items.=escape($_).'='.escape($storehash{$_}).'&';
708: } keys %storehash;
709: $items=~s/\&$//;
710: return reply("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
711: $ENV{'user.home'});
712: }
713:
714: # ------------------------------------------------------ critical put interface
715:
716: sub cput {
717: my ($namespace,%storehash)=@_;
718: my $items='';
719: map {
720: $items.=escape($_).'='.escape($storehash{$_}).'&';
721: } keys %storehash;
722: $items=~s/\&$//;
723: return critical
724: ("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
725: $ENV{'user.home'});
726: }
727:
728: # -------------------------------------------------------------- eget interface
729:
730: sub eget {
731: my ($namespace,@storearr)=@_;
732: my $items='';
733: map {
734: $items.=escape($_).'&';
735: } @storearr;
736: $items=~s/\&$//;
737: my $rep=reply("eget:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
738: $ENV{'user.home'});
739: my @pairs=split(/\&/,$rep);
740: my %returnhash=();
741: my $i=0;
742: map {
743: $returnhash{$_}=unescape($pairs[$i]);
744: $i++;
745: } @storearr;
746: return %returnhash;
747: }
748:
749: # ------------------------------------------------- Check for a user priviledge
750:
751: sub allowed {
752: my ($priv,$uri)=@_;
753: $uri=&declutter($uri);
754:
755: # Free bre access to adm and meta resources
756:
757: if ((($uri=~/^adm\//) || ($uri=~/\.meta$/)) && ($priv eq 'bre')) {
758: return 'F';
759: }
760:
761: my $thisallowed='';
762: my $statecond=0;
763: my $courseprivid='';
764:
765: # Course
766:
767: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'}=~/$priv\&([^\:]*)/) {
768: $thisallowed.=$1;
769: }
770:
771: # Domain
772:
773: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.(split(/\//,$uri))[0].'/'}
774: =~/$priv\&([^\:]*)/) {
775: $thisallowed.=$1;
776: }
777:
778: # Course: uri itself is a course
779: my $courseuri=$uri;
780: $courseuri=~s/\_(\d)/\/$1/;
781: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseuri}
782: =~/$priv\&([^\:]*)/) {
783: $thisallowed.=$1;
784: }
785:
786: # Full access at system, domain or course-wide level? Exit.
787:
788: if ($thisallowed=~/F/) {
789: return 'F';
790: }
791:
792: # If this is generating or modifying users, exit with special codes
793:
794: if (':csu:cdc:ccc:cin:cta:cep:ccr:cst:cad:cli:cau:cdg:'=~/\:$priv\:/) {
795: return $thisallowed;
796: }
797: #
798: # Gathered so far: system, domain and course wide priviledges
799: #
800: # Course: See if uri or referer is an individual resource that is part of
801: # the course
802:
803: if ($ENV{'request.course.id'}) {
804: $courseprivid=$ENV{'request.course.id'};
805: if ($ENV{'request.course.sec'}) {
806: $courseprivid.='/'.$ENV{'request.course.sec'};
807: }
808: $courseprivid=~s/\_/\//;
809: my $checkreferer=1;
810: my @uriparts=split(/\//,$uri);
811: my $filename=$uriparts[$#uriparts];
812: my $pathname=$uri;
813: $pathname=~s/\/$filename$//;
814: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
815: /\&$filename\:([\d\|]+)\&/) {
816: $statecond=$1;
817: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
818: =~/$priv\&([^\:]*)/) {
819: $thisallowed.=$1;
820: $checkreferer=0;
821: }
822: }
823:
824: if (($ENV{'HTTP_REFERER'}) && ($checkreferer)) {
825: my $refuri=$ENV{'HTTP_REFERER'};
826: $refuri=~s/^http\:\/\/$ENV{'request.host'}//i;
827: $refuri=&declutter($refuri);
828: my @uriparts=split(/\//,$refuri);
829: my $filename=$uriparts[$#uriparts];
830: my $pathname=$refuri;
831: $pathname=~s/\/$filename$//;
832: my @filenameparts=split(/\./,$uri);
833: if (&fileembstyle($filenameparts[$#filenameparts]) ne 'ssi') {
834: if ($ENV{'acc.res.'.$ENV{'request.course.id'}.'.'.$pathname}=~
835: /\&$filename\:([\d\|]+)\&/) {
836: my $refstatecond=$1;
837: if ($ENV{'user.priv.'.$ENV{'request.role'}.'./'.$courseprivid}
838: =~/$priv\&([^\:]*)/) {
839: $thisallowed.=$1;
840: $uri=$refuri;
841: $statecond=$refstatecond;
842: }
843: }
844: }
845: }
846: }
847:
848: #
849: # Gathered now: all priviledges that could apply, and condition number
850: #
851: #
852: # Full or no access?
853: #
854:
855: if ($thisallowed=~/F/) {
856: return 'F';
857: }
858:
859: unless ($thisallowed) {
860: return '';
861: }
862:
863: # Restrictions exist, deal with them
864: #
865: # C:according to course preferences
866: # R:according to resource settings
867: # L:unless locked
868: # X:according to user session state
869: #
870:
871: # Possibly locked functionality, check all courses
872: # Locks might take effect only after 10 minutes cache expiration for other
873: # courses, and 2 minutes for current course
874:
875: my $envkey;
876: if ($thisallowed=~/L/) {
877: foreach $envkey (keys %ENV) {
878: if ($envkey=~/^user\.role\.(st|ta)\.([^\.]*)/) {
879: my $courseid=$2;
880: my $roleid=$1.'.'.$2;
881: my $expiretime=600;
882: if ($ENV{'request.role'} eq $roleid) {
883: $expiretime=120;
884: }
885: my ($cdom,$cnum,$csec)=split(/\//,$courseid);
886: my $prefix='course.'.$cdom.'_'.$cnum.'.';
887: if ((time-$ENV{$prefix.'last_cache'})>$expiretime) {
888: &coursedescription($courseid);
889: }
890: if (($ENV{$prefix.'res.'.$uri.'.lock.sections'}=~/\,$csec\,/)
891: || ($ENV{$prefix.'res.'.$uri.'.lock.sections'} eq 'all')) {
892: if ($ENV{$prefix.'res.'.$uri.'.lock.expire'}>time) {
893: &log($ENV{'user.domain'},$ENV{'user.name'},
894: $ENV{'user.host'},
895: 'Locked by res: '.$priv.' for '.$uri.' due to '.
896: $cdom.'/'.$cnum.'/'.$csec.' expire '.
897: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
898: return '';
899: }
900: }
901: if (($ENV{$prefix.'priv.'.$priv.'.lock.sections'}=~/\,$csec\,/)
902: || ($ENV{$prefix.'priv.'.$priv.'.lock.sections'} eq 'all')) {
903: if ($ENV{'priv.'.$priv.'.lock.expire'}>time) {
904: &log($ENV{'user.domain'},$ENV{'user.name'},
905: $ENV{'user.host'},
906: 'Locked by priv: '.$priv.' for '.$uri.' due to '.
907: $cdom.'/'.$cnum.'/'.$csec.' expire '.
908: $ENV{$prefix.'priv.'.$priv.'.lock.expire'});
909: return '';
910: }
911: }
912: }
913: }
914: }
915:
916: #
917: # Rest of the restrictions depend on selected course
918: #
919:
920: unless ($ENV{'request.course.id'}) {
921: return '1';
922: }
923:
924: #
925: # Now user is definitely in a course
926: #
927:
928:
929: # Course preferences
930:
931: if ($thisallowed=~/C/) {
932: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
933: if ($ENV{'course.'.$ENV{'request.course.id'}.'.'.$priv.'.roles.denied'}
934: =~/\,$rolecode\,/) {
935: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
936: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode.' in '.
937: $ENV{'request.course.id'});
938: return '';
939: }
940: }
941:
942: # Resource preferences
943:
944: if ($thisallowed=~/R/) {
945: my $rolecode=(split(/\./,$ENV{'request.role'}))[0];
946: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
947: if (-e $filename) {
948: my @content;
949: {
950: my $fh=Apache::File->new($filename);
951: @content=<$fh>;
952: }
953: if (join('',@content)=~
954: /\<roledeny[^\>]*\>[^\<]*$rolecode[^\<]*\<\/roledeny\>/) {
955: &log($ENV{'user.domain'},$ENV{'user.name'},$ENV{'user.host'},
956: 'Denied by role: '.$priv.' for '.$uri.' as '.$rolecode);
957: return '';
958:
959: }
960: }
961: }
962:
963: # Restricted by state?
964:
965: if ($thisallowed=~/X/) {
966: if (&condval($statecond)) {
967: return '2';
968: } else {
969: return '';
970: }
971: }
972:
973: return 'F';
974: }
975:
976: # ----------------------------------------------------------------- Define Role
977:
978: sub definerole {
979: if (allowed('mcr','/')) {
980: my ($rolename,$sysrole,$domrole,$courole)=@_;
981: map {
982: my ($crole,$cqual)=split(/\&/,$_);
983: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
984: if ($pr{'cr:s'}=~/$crole\&/) {
985: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
986: return "refused:s:$crole&$cqual";
987: }
988: }
989: } split('/',$sysrole);
990: map {
991: my ($crole,$cqual)=split(/\&/,$_);
992: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
993: if ($pr{'cr:d'}=~/$crole\&/) {
994: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
995: return "refused:d:$crole&$cqual";
996: }
997: }
998: } split('/',$domrole);
999: map {
1000: my ($crole,$cqual)=split(/\&/,$_);
1001: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
1002: if ($pr{'cr:c'}=~/$crole\&/) {
1003: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
1004: return "refused:c:$crole&$cqual";
1005: }
1006: }
1007: } split('/',$courole);
1008: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1009: "$ENV{'user.domain'}:$ENV{'user.name'}:".
1010: "rolesdef_$rolename=".
1011: escape($sysrole.'_'.$domrole.'_'.$courole);
1012: return reply($command,$ENV{'user.home'});
1013: } else {
1014: return 'refused';
1015: }
1016: }
1017:
1018: # ------------------------------------------------------------------ Plain Text
1019:
1020: sub plaintext {
1021: my $short=shift;
1022: return $prp{$short};
1023: }
1024:
1025: # ------------------------------------------------------------------ Plain Text
1026:
1027: sub fileembstyle {
1028: my $ending=shift;
1029: return $fe{$ending};
1030: }
1031:
1032: # ------------------------------------------------------------ Description Text
1033:
1034: sub filedecription {
1035: my $ending=shift;
1036: return $fd{$ending};
1037: }
1038:
1039: # ----------------------------------------------------------------- Assign Role
1040:
1041: sub assignrole {
1042: my ($udom,$uname,$url,$role,$end,$start)=@_;
1043: my $mrole;
1044: $url=declutter($url);
1045: if ($role =~ /^cr\//) {
1046: unless ($url=~/\.course$/) { return 'invalid'; }
1047: unless (allowed('ccr',$url)) { return 'refused'; }
1048: $mrole='cr';
1049: } else {
1050: unless (($url=~/\.course$/) || ($url=~/\/$/)) { return 'invalid'; }
1051: unless (allowed('c'+$role)) { return 'refused'; }
1052: $mrole=$role;
1053: }
1054: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
1055: "$udom:$uname:$url".'_'."$mrole=$role";
1056: if ($end) { $command.='_$end'; }
1057: if ($start) {
1058: if ($end) {
1059: $command.='_$start';
1060: } else {
1061: $command.='_0_$start';
1062: }
1063: }
1064: return &reply($command,&homeserver($uname,$udom));
1065: }
1066:
1067: # ---------------------------------------------------------- Assign Custom Role
1068:
1069: sub assigncustomrole {
1070: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
1071: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
1072: $end,$start);
1073: }
1074:
1075: # ----------------------------------------------------------------- Revoke Role
1076:
1077: sub revokerole {
1078: my ($udom,$uname,$url,$role)=@_;
1079: my $now=time;
1080: return &assignrole($udom,$uname,$url,$role,$now);
1081: }
1082:
1083: # ---------------------------------------------------------- Revoke Custom Role
1084:
1085: sub revokecustomrole {
1086: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
1087: my $now=time;
1088: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
1089: }
1090:
1091: # ------------------------------------------------------------ Directory lister
1092:
1093: sub dirlist {
1094: my $uri=shift;
1095: $uri=~s/^\///;
1096: $uri=~s/\/$//;
1097: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
1098: if ($udom) {
1099: if ($uname) {
1100: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
1101: homeserver($uname,$udom));
1102: return split(/:/,$listing);
1103: } else {
1104: my $tryserver;
1105: my %allusers=();
1106: foreach $tryserver (keys %libserv) {
1107: if ($hostdom{$tryserver} eq $udom) {
1108: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
1109: $tryserver);
1110: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
1111: && ($listing ne 'con_lost')) {
1112: map {
1113: my ($entry,@stat)=split(/&/,$_);
1114: $allusers{$entry}=1;
1115: } split(/:/,$listing);
1116: }
1117: }
1118: }
1119: my $alluserstr='';
1120: map {
1121: $alluserstr.=$_.'&user:';
1122: } sort keys %allusers;
1123: $alluserstr=~s/:$//;
1124: return split(/:/,$alluserstr);
1125: }
1126: } else {
1127: my $tryserver;
1128: my %alldom=();
1129: foreach $tryserver (keys %libserv) {
1130: $alldom{$hostdom{$tryserver}}=1;
1131: }
1132: my $alldomstr='';
1133: map {
1134: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
1135: } sort keys %alldom;
1136: $alldomstr=~s/:$//;
1137: return split(/:/,$alldomstr);
1138: }
1139: }
1140:
1141: # -------------------------------------------------------- Value of a Condition
1142:
1143: sub directcondval {
1144: my $number=shift;
1145: if ($ENV{'user.state.'.$ENV{'request.course.id'}}) {
1146: return substr($ENV{'user.state.'.$ENV{'request.course.id'}},$number,1);
1147: } else {
1148: return 2;
1149: }
1150: }
1151:
1152: sub condval {
1153: my $condidx=shift;
1154: my $result=0;
1155: my $allpathcond='';
1156: map {
1157: if (defined($ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_})) {
1158: $allpathcond.=
1159: '('.$ENV{'acc.cond.'.$ENV{'request.course.id'}.'.'.$_}.')|';
1160: }
1161: } split(/\|/,$condidx);
1162: $allpathcond=~s/\|$//;
1163: if ($ENV{'request.course.id'}) {
1164: if ($allpathcond) {
1165: my $operand='|';
1166: my @stack;
1167: map {
1168: if ($_ eq '(') {
1169: push @stack,($operand,$result)
1170: } elsif ($_ eq ')') {
1171: my $before=pop @stack;
1172: if (pop @stack eq '&') {
1173: $result=$result>$before?$before:$result;
1174: } else {
1175: $result=$result>$before?$result:$before;
1176: }
1177: } elsif (($_ eq '&') || ($_ eq '|')) {
1178: $operand=$_;
1179: } else {
1180: my $new=directcondval($_);
1181: if ($operand eq '&') {
1182: $result=$result>$new?$new:$result;
1183: } else {
1184: $result=$result>$new?$result:$new;
1185: }
1186: }
1187: } ($allpathcond=~/(\d+|\(|\)|\&|\|)/g);
1188: }
1189: }
1190: return $result;
1191: }
1192:
1193: # --------------------------------------------------------- Value of a Variable
1194:
1195: sub EXT {
1196: my $varname=shift;
1197: unless ($varname) { return ''; }
1198: my ($realm,$space,$qualifier,@therest)=split(/\./,$varname);
1199: my $rest;
1200: if ($therest[0]) {
1201: $rest=join('.',@therest);
1202: } else {
1203: $rest='';
1204: }
1205: my $qualifierrest=$qualifier;
1206: if ($rest) { $qualifierrest.='.'.$rest; }
1207: my $spacequalifierrest=$space;
1208: if ($qualifierrest) { $spacequalifierrest.='.'.$qualifierrest; }
1209: if ($realm eq 'user') {
1210: # --------------------------------------------------------------- user.resource
1211: if ($space eq 'resource') {
1212: my %restored=&restore;
1213: return $restored{$qualifierrest};
1214: # ----------------------------------------------------------------- user.access
1215: } elsif ($space eq 'access') {
1216: return &allowed($qualifier,$rest);
1217: # ------------------------------------------ user.preferences, user.environment
1218: } elsif (($space eq 'preferences') || ($space eq 'environment')) {
1219: return $ENV{join('.',('environment',$qualifierrest))};
1220: # ----------------------------------------------------------------- user.course
1221: } elsif ($space eq 'course') {
1222: return $ENV{join('.',('request.course',$qualifier))};
1223: # ------------------------------------------------------------------- user.role
1224: } elsif ($space eq 'role') {
1225: my ($role,$where)=split(/\./,$ENV{'request.role'});
1226: if ($qualifier eq 'value') {
1227: return $role;
1228: } elsif ($qualifier eq 'extent') {
1229: return $where;
1230: }
1231: # ----------------------------------------------------------------- user.domain
1232: } elsif ($space eq 'domain') {
1233: return $ENV{'user.domain'};
1234: # ------------------------------------------------------------------- user.name
1235: } elsif ($space eq 'name') {
1236: return $ENV{'user.name'};
1237: # ---------------------------------------------------- Any other user namespace
1238: } else {
1239: my $item=($rest)?$qualifier.'.'.$rest:$qualifier;
1240: my %reply=&get($space,$item);
1241: return $reply{$item};
1242: }
1243: } elsif ($realm eq 'request') {
1244: # ------------------------------------------------------------- request.browser
1245: if ($space eq 'browser') {
1246: return $ENV{'browser.'.$qualifier};
1247: # ------------------------------------------------------------ request.filename
1248: } else {
1249: return $ENV{'request.'.$spacequalifierrest};
1250: }
1251: } elsif ($realm eq 'course') {
1252: # ---------------------------------------------------------- course.description
1253: my $section='';
1254: if ($ENV{'request.course.sec'}) {
1255: $section='_'.$ENV{'request.course.sec'};
1256: }
1257: return $ENV{'course.'.$ENV{'request.course.id'}.$section.'.'.
1258: $spacequalifierrest};
1259: } elsif ($realm eq 'resource') {
1260: if ($ENV{'request.course.id'}) {
1261: # ----------------------------------------------------- Cascading lookup scheme
1262: my $symbp=&symbread();
1263: my $mapp=(split(/\_\_\_/,$symbp))[0];
1264:
1265: my $symbparm=$symbp.'.'.$spacequalifierrest;
1266: my $mapparm=$mapp.'___(all).'.$spacequalifierrest;
1267:
1268: my $seclevel=
1269: $ENV{'request.course.id'}.'.['.
1270: $ENV{'request.course.sec'}.'].'.$spacequalifierrest;
1271: my $seclevelr=
1272: $ENV{'request.course.id'}.'.['.
1273: $ENV{'request.course.sec'}.'].'.$symbparm;
1274: my $seclevelm=
1275: $ENV{'request.course.id'}.'.['.
1276: $ENV{'request.course.sec'}.'].'.$mapparm;
1277:
1278: my $courselevel=
1279: $ENV{'request.course.id'}.'.'.$spacequalifierrest;
1280: my $courselevelr=
1281: $ENV{'request.course.id'}.'.'.$symbparm;
1282: my $courselevelm=
1283: $ENV{'request.course.id'}.'.'.$mapparm;
1284:
1285:
1286: # ----------------------------------------------------------- first, check user
1287: my %resourcedata=get('resourcedata',
1288: ($courselevelr,$courselevelm,$courselevel));
1289: if ($resourcedata{$courselevelr}!~/^error\:/) {
1290:
1291: if ($resourcedata{$courselevelr}) {
1292: return $resourcedata{$courselevelr}; }
1293: if ($resourcedata{$courselevelm}) {
1294: return $resourcedata{$courselevelm}; }
1295: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1296:
1297: }
1298: # -------------------------------------------------------- second, check course
1299: my $section='';
1300: if ($ENV{'request.course.sec'}) {
1301: $section='_'.$ENV{'request.course.sec'};
1302: }
1303: my $reply=&reply('get:'.
1304: $ENV{'course.'.$ENV{'request.course.id'}.$section.'.domain'}.':'.
1305: $ENV{'course.'.$ENV{'request.course.id'}.$section.'.num'}.
1306: ':resourcedata:'.
1307: escape($seclevelr).':'.escape($seclevelm).':'.escape($seclevel).':'.
1308: escape($courselevelr).':'.escape($courselevelm).':'.escape($courselevel),
1309: $ENV{'course.'.$ENV{'request.course.id'}.$section.'.home'});
1310: if ($reply!~/^error\:/) {
1311: map {
1312: my ($name,$value)=split(/\=/,$_);
1313: $resourcedata{unescape($name)}=unescape($value);
1314: } split(/\&/,$reply);
1315:
1316: if ($resourcedata{$seclevelr}) { return $resourcedata{$seclevelr}; }
1317: if ($resourcedata{$seclevelm}) { return $resourcedata{$seclevelm}; }
1318: if ($resourcedata{$seclevel}) { return $resourcedata{$seclevel}; }
1319:
1320: if ($resourcedata{$courselevelr}) {
1321: return $resourcedata{$courselevelr}; }
1322: if ($resourcedata{$courselevelm}) {
1323: return $resourcedata{$courselevelm}; }
1324: if ($resourcedata{$courselevel}) { return $resourcedata{$courselevel}; }
1325:
1326: }
1327:
1328: # ------------------------------------------------------ third, check map parms
1329: my %parmhash=();
1330: my $thisparm='';
1331: if (tie(%parmhash,'GDBM_File',
1332: $ENV{'request.course.fn'}.'_parms.db',&GDBM_READER,0640)) {
1333: $thisparm=$parmhash{$symbparm};
1334: untie(%parmhash);
1335: }
1336: if ($thisparm) { return $thisparm; }
1337: }
1338:
1339: # --------------------------------------------- last, look in resource metadata
1340: my $uri=&declutter($ENV{'request.filename'});
1341: my $filename=$perlvar{'lonDocRoot'}.'/res/'.$uri.'.meta';
1342: if (-e $filename) {
1343: my @content;
1344: {
1345: my $fh=Apache::File->new($filename);
1346: @content=<$fh>;
1347: }
1348: if (join('',@content)=~
1349: /\<$space[^\>]*\>([^\<]*)\<\/$space\>/) {
1350: return $1;
1351: }
1352: }
1353: # ---------------------------------------------------- Any other user namespace
1354: } elsif ($realm eq 'environment') {
1355: # ----------------------------------------------------------------- environment
1356: return $ENV{$spacequalifierrest};
1357: } elsif ($realm eq 'system') {
1358: # ----------------------------------------------------------------- system.time
1359: if ($space eq 'time') {
1360: return time;
1361: }
1362: }
1363: return '';
1364: }
1365:
1366: # ------------------------------------------------- Update symbolic store links
1367:
1368: sub symblist {
1369: my ($mapname,%newhash)=@_;
1370: $mapname=declutter($mapname);
1371: my %hash;
1372: if (($ENV{'request.course.fn'}) && (%newhash)) {
1373: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1374: &GDBM_WRCREAT,0640)) {
1375: map {
1376: $hash{declutter($_)}=$mapname.'___'.$newhash{$_};
1377: } keys %newhash;
1378: if (untie(%hash)) {
1379: return 'ok';
1380: }
1381: }
1382: }
1383: return 'error';
1384: }
1385:
1386: # ------------------------------------------------------ Return symb list entry
1387:
1388: sub symbread {
1389: my $thisfn=shift;
1390: unless ($thisfn) {
1391: $thisfn=$ENV{'request.filename'};
1392: }
1393: $thisfn=declutter($thisfn);
1394: my %hash;
1395: my %bighash;
1396: my $syval='';
1397: if (($ENV{'request.course.fn'}) && ($thisfn)) {
1398: if (tie(%hash,'GDBM_File',$ENV{'request.course.fn'}.'_symb.db',
1399: &GDBM_READER,0640)) {
1400: $syval=$hash{$thisfn};
1401: untie(%hash);
1402: }
1403: # ---------------------------------------------------------- There was an entry
1404: if ($syval) {
1405: unless ($syval=~/\_\d+$/) {
1406: unless ($ENV{'form.request.prefix'}=~/\.(\d+)\_$/) {
1407: &appenv('request.ambiguous' => $thisfn);
1408: return '';
1409: }
1410: $syval.=$1;
1411: }
1412: } else {
1413: # ------------------------------------------------------- Was not in symb table
1414: if (tie(%bighash,'GDBM_File',$ENV{'request.course.fn'}.'.db',
1415: &GDBM_READER,0640)) {
1416: # ---------------------------------------------- Get ID(s) for current resource
1417: my $ids=$bighash{'ids_/res/'.$thisfn};
1418: unless ($ids) {
1419: $ids=$bighash{'ids_/'.$thisfn};
1420: }
1421: if ($ids) {
1422: # ------------------------------------------------------------------- Has ID(s)
1423: my @possibilities=split(/\,/,$ids);
1424: if ($#possibilities==0) {
1425: # ----------------------------------------------- There is only one possibility
1426: my ($mapid,$resid)=split(/\./,$ids);
1427: $syval=declutter($bighash{'map_id_'.$mapid}).'___'.$resid;
1428: } else {
1429: # ------------------------------------------ There is more than one possibility
1430: my $realpossible=0;
1431: map {
1432: my $file=$bighash{'src_'.$_};
1433: if (&allowed('bre',$file)) {
1434: my ($mapid,$resid)=split(/\./,$_);
1435: if ($bighash{'map_type_'.$mapid} ne 'page') {
1436: $realpossible++;
1437: $syval=declutter($bighash{'map_id_'.$mapid}).
1438: '___'.$resid;
1439: }
1440: }
1441: } @possibilities;
1442: if ($realpossible!=1) { $syval=''; }
1443: }
1444: }
1445: untie(%bighash)
1446: }
1447: }
1448: if ($syval) {
1449: return $syval.'___'.$thisfn;
1450: }
1451: }
1452: &appenv('request.ambiguous' => $thisfn);
1453: return '';
1454: }
1455:
1456: # ---------------------------------------------------------- Return random seed
1457:
1458: sub numval {
1459: my $txt=shift;
1460: $txt=~tr/A-J/0-9/;
1461: $txt=~tr/a-j/0-9/;
1462: $txt=~tr/K-T/0-9/;
1463: $txt=~tr/k-t/0-9/;
1464: $txt=~tr/U-Z/0-5/;
1465: $txt=~tr/u-z/0-5/;
1466: $txt=~s/\D//g;
1467: return int($txt);
1468: }
1469:
1470: sub rndseed {
1471: my $symb;
1472: unless ($symb=&symbread()) { return time; }
1473: my $symbchck=unpack("%32C*",$symb);
1474: my $symbseed=numval($symb)%$symbchck;
1475: my $namechck=unpack("%32C*",$ENV{'user.name'});
1476: my $nameseed=numval($ENV{'user.name'})%$namechck;
1477: return int( $symbseed
1478: .$nameseed
1479: .unpack("%32C*",$ENV{'user.domain'})
1480: .unpack("%32C*",$ENV{'request.course.id'})
1481: .$namechck
1482: .$symbchck);
1483: }
1484:
1485: # ------------------------------------------------------------ Serves up a file
1486: # returns either the contents of the file or a -1
1487: sub getfile {
1488: my $file=shift;
1489: &repcopy($file);
1490: if (! -e $file ) { return -1; };
1491: my $fh=Apache::File->new($file);
1492: my $a='';
1493: while (<$fh>) { $a .=$_; }
1494: return $a
1495: }
1496:
1497: sub filelocation {
1498: my ($dir,$file) = @_;
1499: my $location;
1500: $file=~ s/^\s*(\S+)\s*$/$1/; ## strip off leading and trailing spaces
1501: if ($file=~m:^/~:) { # is a contruction space reference
1502: $location = $file;
1503: $location =~ s:/~(.*?)/(.*):/home/$1/public_html/$2:;
1504: } else {
1505: $file=~s/^$perlvar{'lonDocRoot'}//;
1506: $file=~s:^/*res::;
1507: if ( !( $file =~ m:^/:) ) {
1508: $location = $dir. '/'.$file;
1509: } else {
1510: $location = '/home/httpd/html/res'.$file;
1511: }
1512: }
1513: $location=~s://+:/:g; # remove duplicate /
1514: while ($location=~m:/\.\./:) {$location=~ s:/[^/]+/\.\./:/:g;} #remove dir/..
1515: return $location;
1516: }
1517:
1518: sub hreflocation {
1519: my ($dir,$file)=@_;
1520: unless (($_=~/^http:\/\//i) || ($_=~/^\//)) {
1521: my $finalpath=filelocation($dir,$file);
1522: $finalpath=~s/^\/home\/httpd\/html//;
1523: return $finalpath;
1524: } else {
1525: return $file;
1526: }
1527: }
1528:
1529: # ------------------------------------------------------------- Declutters URLs
1530:
1531: sub declutter {
1532: my $thisfn=shift;
1533: $thisfn=~s/^$perlvar{'lonDocRoot'}//;
1534: $thisfn=~s/^\///;
1535: $thisfn=~s/^res\///;
1536: return $thisfn;
1537: }
1538:
1539: # -------------------------------------------------------- Escape Special Chars
1540:
1541: sub escape {
1542: my $str=shift;
1543: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
1544: return $str;
1545: }
1546:
1547: # ----------------------------------------------------- Un-Escape Special Chars
1548:
1549: sub unescape {
1550: my $str=shift;
1551: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
1552: return $str;
1553: }
1554:
1555: # ================================================================ Main Program
1556:
1557: sub BEGIN {
1558: if ($readit ne 'done') {
1559: # ------------------------------------------------------------ Read access.conf
1560: {
1561: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
1562:
1563: while (my $configline=<$config>) {
1564: if ($configline =~ /PerlSetVar/) {
1565: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
1566: chomp($varvalue);
1567: $perlvar{$varname}=$varvalue;
1568: }
1569: }
1570: }
1571:
1572: # ------------------------------------------------------------- Read hosts file
1573: {
1574: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
1575:
1576: while (my $configline=<$config>) {
1577: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
1578: $hostname{$id}=$name;
1579: $hostdom{$id}=$domain;
1580: if ($role eq 'library') { $libserv{$id}=$name; }
1581: }
1582: }
1583:
1584: # ------------------------------------------------------ Read spare server file
1585: {
1586: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
1587:
1588: while (my $configline=<$config>) {
1589: chomp($configline);
1590: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
1591: $spareid{$configline}=1;
1592: }
1593: }
1594: }
1595: # ------------------------------------------------------------ Read permissions
1596: {
1597: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
1598:
1599: while (my $configline=<$config>) {
1600: chomp($configline);
1601: my ($role,$perm)=split(/ /,$configline);
1602: if ($perm ne '') { $pr{$role}=$perm; }
1603: }
1604: }
1605:
1606: # -------------------------------------------- Read plain texts for permissions
1607: {
1608: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
1609:
1610: while (my $configline=<$config>) {
1611: chomp($configline);
1612: my ($short,$plain)=split(/:/,$configline);
1613: if ($plain ne '') { $prp{$short}=$plain; }
1614: }
1615: }
1616:
1617: # ------------------------------------------------------------- Read file types
1618: {
1619: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
1620:
1621: while (my $configline=<$config>) {
1622: chomp($configline);
1623: my ($ending,$emb,@descr)=split(/\s+/,$configline);
1624: if ($descr[0] ne '') {
1625: $fe{$ending}=$emb;
1626: $fd{$ending}=join(' ',@descr);
1627: }
1628: }
1629: }
1630:
1631:
1632: $readit='done';
1633: &logthis('<font color=yellow>INFO: Read configuration</font>');
1634: }
1635: }
1636: 1;
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