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: # store(hash) : stores hash permanently for this url
28: # restore : returns hash for this url
29: # eget(namesp,array) : returns hash with keys from array filled in from namesp
30: # get(namesp,array) : returns hash with keys from array filled in from namesp
31: # del(namesp,array) : deletes keys out of arry from namesp
32: # put(namesp,hash) : stores hash in namesp
33: # dump(namesp) : dumps the complete namespace into a hash
34: # ssi(url,hash) : does a complete request cycle on url to localhost, posts
35: # hash
36: # repcopy(filename) : replicate file
37: # dirlist(url) : gets a directory listing
38: # condval(index) : value of condition index based on state
39: # varval(name) : value of a variable
40: # refreshstate() : refresh the state information string
41: #
42: # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,
43: # 7/1,7/2,7/9,7/10,7/12,7/14,7/15,7/19,
44: # 11/8,11/16,11/18,11/22,11/23,12/22,
45: # 01/06,01/13,02/24,02/28,02/29,
46: # 03/01,03/02,03/06,03/07,03/13,
47: # 04/05,05/29,05/31,06/01,
48: # 06/05,06/26 Gerd Kortemeyer
49: # 06/26 Ben Tyszka
50: # 06/30,07/15,07/17,07/18,07/20,07/21,07/22,07/25 Gerd Kortemeyer
51: # 08/14 Ben Tyszka
52: # 08/22,08/28,08/31,09/01,09/02,09/04,09/05 Gerd Kortemeyer
53:
54: package Apache::lonnet;
55:
56: use strict;
57: use Apache::File;
58: use LWP::UserAgent();
59: use HTTP::Headers;
60: use vars
61: qw(%perlvar %hostname %homecache %spareid %hostdom %libserv %pr %prp %fe %fd $readit);
62: use IO::Socket;
63: use Apache::Constants qw(:common :http);
64:
65: # --------------------------------------------------------------------- Logging
66:
67: sub logthis {
68: my $message=shift;
69: my $execdir=$perlvar{'lonDaemons'};
70: my $now=time;
71: my $local=localtime($now);
72: my $fh=Apache::File->new(">>$execdir/logs/lonnet.log");
73: print $fh "$local ($$): $message\n";
74: return 1;
75: }
76:
77: sub logperm {
78: my $message=shift;
79: my $execdir=$perlvar{'lonDaemons'};
80: my $now=time;
81: my $local=localtime($now);
82: my $fh=Apache::File->new(">>$execdir/logs/lonnet.perm.log");
83: print $fh "$now:$message:$local\n";
84: return 1;
85: }
86:
87: # -------------------------------------------------- Non-critical communication
88: sub subreply {
89: my ($cmd,$server)=@_;
90: my $peerfile="$perlvar{'lonSockDir'}/$server";
91: my $client=IO::Socket::UNIX->new(Peer =>"$peerfile",
92: Type => SOCK_STREAM,
93: Timeout => 10)
94: or return "con_lost";
95: print $client "$cmd\n";
96: my $answer=<$client>;
97: if (!$answer) { $answer="con_lost"; }
98: chomp($answer);
99: return $answer;
100: }
101:
102: sub reply {
103: my ($cmd,$server)=@_;
104: my $answer=subreply($cmd,$server);
105: if ($answer eq 'con_lost') { $answer=subreply($cmd,$server); }
106: if (($answer=~/^error:/) || ($answer=~/^refused/) ||
107: ($answer=~/^rejected/)) {
108: &logthis("<font color=blue>WARNING:".
109: " $cmd to $server returned $answer</font>");
110: }
111: return $answer;
112: }
113:
114: # ----------------------------------------------------------- Send USR1 to lonc
115:
116: sub reconlonc {
117: my $peerfile=shift;
118: &logthis("Trying to reconnect for $peerfile");
119: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
120: if (my $fh=Apache::File->new("$loncfile")) {
121: my $loncpid=<$fh>;
122: chomp($loncpid);
123: if (kill 0 => $loncpid) {
124: &logthis("lonc at pid $loncpid responding, sending USR1");
125: kill USR1 => $loncpid;
126: sleep 1;
127: if (-e "$peerfile") { return; }
128: &logthis("$peerfile still not there, give it another try");
129: sleep 5;
130: if (-e "$peerfile") { return; }
131: &logthis(
132: "<font color=blue>WARNING: $peerfile still not there, giving up</font>");
133: } else {
134: &logthis(
135: "<font color=blue>WARNING:".
136: " lonc at pid $loncpid not responding, giving up</font>");
137: }
138: } else {
139: &logthis('<font color=blue>WARNING: lonc not running, giving up</font>');
140: }
141: }
142:
143: # ------------------------------------------------------ Critical communication
144:
145: sub critical {
146: my ($cmd,$server)=@_;
147: my $answer=reply($cmd,$server);
148: if ($answer eq 'con_lost') {
149: my $pingreply=reply('ping',$server);
150: &reconlonc("$perlvar{'lonSockDir'}/$server");
151: my $pongreply=reply('pong',$server);
152: &logthis("Ping/Pong for $server: $pingreply/$pongreply");
153: $answer=reply($cmd,$server);
154: if ($answer eq 'con_lost') {
155: my $now=time;
156: my $middlename=$cmd;
157: $middlename=substr($middlename,0,16);
158: $middlename=~s/\W//g;
159: my $dfilename=
160: "$perlvar{'lonSockDir'}/delayed/$now.$middlename.$server";
161: {
162: my $dfh;
163: if ($dfh=Apache::File->new(">$dfilename")) {
164: print $dfh "$cmd\n";
165: }
166: }
167: sleep 2;
168: my $wcmd='';
169: {
170: my $dfh;
171: if ($dfh=Apache::File->new("$dfilename")) {
172: $wcmd=<$dfh>;
173: }
174: }
175: chomp($wcmd);
176: if ($wcmd eq $cmd) {
177: &logthis("<font color=blue>WARNING: ".
178: "Connection buffer $dfilename: $cmd</font>");
179: &logperm("D:$server:$cmd");
180: return 'con_delayed';
181: } else {
182: &logthis("<font color=red>CRITICAL:"
183: ." Critical connection failed: $server $cmd</font>");
184: &logperm("F:$server:$cmd");
185: return 'con_failed';
186: }
187: }
188: }
189: return $answer;
190: }
191:
192: # ---------------------------------------------------------- Append Environment
193:
194: sub appenv {
195: my %newenv=@_;
196: my @oldenv;
197: {
198: my $fh;
199: unless ($fh=Apache::File->new("$ENV{'user.environment'}")) {
200: return 'error';
201: }
202: @oldenv=<$fh>;
203: }
204: for (my $i=0; $i<=$#oldenv; $i++) {
205: chomp($oldenv[$i]);
206: if ($oldenv[$i] ne '') {
207: my ($name,$value)=split(/=/,$oldenv[$i]);
208: unless (defined($newenv{$name})) {
209: $newenv{$name}=$value;
210: }
211: }
212: }
213: {
214: my $fh;
215: unless ($fh=Apache::File->new(">$ENV{'user.environment'}")) {
216: return 'error';
217: }
218: my $newname;
219: foreach $newname (keys %newenv) {
220: print $fh "$newname=$newenv{$newname}\n";
221: }
222: }
223: return 'ok';
224: }
225:
226: # ------------------------------ Find server with least workload from spare.tab
227:
228: sub spareserver {
229: my $tryserver;
230: my $spareserver='';
231: my $lowestserver=100;
232: foreach $tryserver (keys %spareid) {
233: my $answer=reply('load',$tryserver);
234: if (($answer =~ /\d/) && ($answer<$lowestserver)) {
235: $spareserver="http://$hostname{$tryserver}";
236: $lowestserver=$answer;
237: }
238: }
239: return $spareserver;
240: }
241:
242: # --------- Try to authenticate user from domain's lib servers (first this one)
243:
244: sub authenticate {
245: my ($uname,$upass,$udom)=@_;
246: $upass=escape($upass);
247: if (($perlvar{'lonRole'} eq 'library') &&
248: ($udom eq $perlvar{'lonDefDomain'})) {
249: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$perlvar{'lonHostID'});
250: if ($answer =~ /authorized/) {
251: if ($answer eq 'authorized') {
252: &logthis("User $uname at $udom authorized by local server");
253: return $perlvar{'lonHostID'};
254: }
255: if ($answer eq 'non_authorized') {
256: &logthis("User $uname at $udom rejected by local server");
257: return 'no_host';
258: }
259: }
260: }
261:
262: my $tryserver;
263: foreach $tryserver (keys %libserv) {
264: if ($hostdom{$tryserver} eq $udom) {
265: my $answer=reply("encrypt:auth:$udom:$uname:$upass",$tryserver);
266: if ($answer =~ /authorized/) {
267: if ($answer eq 'authorized') {
268: &logthis("User $uname at $udom authorized by $tryserver");
269: return $tryserver;
270: }
271: if ($answer eq 'non_authorized') {
272: &logthis("User $uname at $udom rejected by $tryserver");
273: return 'no_host';
274: }
275: }
276: }
277: }
278: &logthis("User $uname at $udom could not be authenticated");
279: return 'no_host';
280: }
281:
282: # ---------------------- Find the homebase for a user from domain's lib servers
283:
284: sub homeserver {
285: my ($uname,$udom)=@_;
286:
287: my $index="$uname:$udom";
288: if ($homecache{$index}) { return "$homecache{$index}"; }
289:
290: my $tryserver;
291: foreach $tryserver (keys %libserv) {
292: if ($hostdom{$tryserver} eq $udom) {
293: my $answer=reply("home:$udom:$uname",$tryserver);
294: if ($answer eq 'found') {
295: $homecache{$index}=$tryserver;
296: return $tryserver;
297: }
298: }
299: }
300: return 'no_host';
301: }
302:
303: # ----------------------------- Subscribe to a resource, return URL if possible
304:
305: sub subscribe {
306: my $fname=shift;
307: my $author=$fname;
308: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
309: my ($udom,$uname)=split(/\//,$author);
310: my $home=homeserver($uname,$udom);
311: if (($home eq 'no_host') || ($home eq $perlvar{'lonHostID'})) {
312: return 'not_found';
313: }
314: my $answer=reply("sub:$fname",$home);
315: return $answer;
316: }
317:
318: # -------------------------------------------------------------- Replicate file
319:
320: sub repcopy {
321: my $filename=shift;
322: $filename=~s/\/+/\//g;
323: my $transname="$filename.in.transfer";
324: if ((-e $filename) || (-e $transname)) { return OK; }
325: my $remoteurl=subscribe($filename);
326: if ($remoteurl eq 'con_lost') {
327: &logthis("Subscribe returned con_lost: $filename");
328: return HTTP_SERVICE_UNAVAILABLE;
329: } elsif ($remoteurl eq 'not_found') {
330: &logthis("Subscribe returned not_found: $filename");
331: return HTTP_NOT_FOUND;
332: } elsif ($remoteurl eq 'rejected') {
333: &logthis("Subscribe returned rejected: $filename");
334: return FORBIDDEN;
335: } elsif ($remoteurl eq 'directory') {
336: return OK;
337: } else {
338: my @parts=split(/\//,$filename);
339: my $path="/$parts[1]/$parts[2]/$parts[3]/$parts[4]";
340: if ($path ne "$perlvar{'lonDocRoot'}/res") {
341: &logthis("Malconfiguration for replication: $filename");
342: return HTTP_BAD_REQUEST;
343: }
344: my $count;
345: for ($count=5;$count<$#parts;$count++) {
346: $path.="/$parts[$count]";
347: if ((-e $path)!=1) {
348: mkdir($path,0777);
349: }
350: }
351: my $ua=new LWP::UserAgent;
352: my $request=new HTTP::Request('GET',"$remoteurl");
353: my $response=$ua->request($request,$transname);
354: if ($response->is_error()) {
355: unlink($transname);
356: my $message=$response->status_line;
357: &logthis("<font color=blue>WARNING:"
358: ." LWP get: $message: $filename</font>");
359: return HTTP_SERVICE_UNAVAILABLE;
360: } else {
361: if ($remoteurl!~/\.meta$/) {
362: my $mrequest=new HTTP::Request('GET',$remoteurl.'.meta');
363: my $mresponse=$ua->request($mrequest,$filename.'.meta');
364: if ($mresponse->is_error()) {
365: unlink($filename.'.meta');
366: &logthis(
367: "<font color=yellow>INFO: No metadata: $filename</font>");
368: }
369: }
370: rename($transname,$filename);
371: return OK;
372: }
373: }
374: }
375:
376: # --------------------------------------------------------- Server Side Include
377:
378: sub ssi {
379:
380: my ($fn,%form)=@_;
381:
382: my $ua=new LWP::UserAgent;
383:
384: my $request;
385:
386: if (%form) {
387: $request=new HTTP::Request('POST',"http://".$ENV{'HTTP_HOST'}.$fn);
388: $request->content(join '&', map { "$_=$form{$_}" } keys %form);
389: } else {
390: $request=new HTTP::Request('GET',"http://".$ENV{'HTTP_HOST'}.$fn);
391: }
392:
393: $request->header(Cookie => $ENV{'HTTP_COOKIE'});
394: my $response=$ua->request($request);
395:
396: return $response->content;
397: }
398:
399: # ------------------------------------------------------------------------- Log
400:
401: sub log {
402: my ($dom,$nam,$hom,$what)=@_;
403: return reply("log:$dom:$nam:$what",$hom);
404: }
405:
406: # ----------------------------------------------------------------------- Store
407:
408: sub store {
409: my %storehash=shift;
410: my $namevalue='';
411: map {
412: $namevalue.=escape($_).'='.escape($storehash{$_}).'&';
413: } keys %storehash;
414: $namevalue=~s/\&$//;
415: return reply("store:$ENV{'user.domain'}:$ENV{'user.name'}:"
416: ."$ENV{'user.class'}:$ENV{'request.filename'}:$namevalue",
417: "$ENV{'user.home'}");
418: }
419:
420: # --------------------------------------------------------------------- Restore
421:
422: sub restore {
423: my $answer=reply("restore:$ENV{'user.domain'}:$ENV{'user.name'}:"
424: ."$ENV{'user.class'}:$ENV{'request.filename'}",
425: "$ENV{'user.home'}");
426: my %returnhash=();
427: map {
428: my ($name,$value)=split(/\=/,$_);
429: $returnhash{&unescape($name)}=&unescape($value);
430: } split(/\&/,$answer);
431: return %returnhash;
432: }
433:
434: # -------------------------------------------------------- Get user priviledges
435:
436: sub rolesinit {
437: my ($domain,$username,$authhost)=@_;
438: my $rolesdump=reply("dump:$domain:$username:roles",$authhost);
439: if (($rolesdump eq 'con_lost') || ($rolesdump eq '')) { return ''; }
440: my %allroles=();
441: my %thesepriv=();
442: my $now=time;
443: my $userroles="user.login.time=$now\n";
444: my $thesestr;
445:
446: if ($rolesdump ne '') {
447: map {
448: if ($_!~/^rolesdef\&/) {
449: my ($area,$role)=split(/=/,$_);
450: $area=~s/\_\w\w$//;
451: my ($trole,$tend,$tstart)=split(/_/,$role);
452: $userroles.='user.role.'.$trole.'.'.$area.'='.
453: $tstart.'.'.$tend."\n";
454: if ($tend!=0) {
455: if ($tend<$now) {
456: $trole='';
457: }
458: }
459: if ($tstart!=0) {
460: if ($tstart>$now) {
461: $trole='';
462: }
463: }
464: if (($area ne '') && ($trole ne '')) {
465: my ($tdummy,$tdomain,$trest)=split(/\//,$area);
466: if ($trole =~ /^cr\//) {
467: my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$trole);
468: my $homsvr=homeserver($rauthor,$rdomain);
469: if ($hostname{$homsvr} ne '') {
470: my $roledef=
471: reply("get:$rdomain:$rauthor:roles:rolesdef_$rrole",
472: $homsvr);
473: if (($roledef ne 'con_lost') && ($roledef ne '')) {
474: my ($syspriv,$dompriv,$coursepriv)=
475: split(/\_/,unescape($roledef));
476: $allroles{'/'}.=':'.$syspriv;
477: if ($tdomain ne '') {
478: $allroles{'/'.$tdomain.'/'}.=':'.$dompriv;
479: if ($trest ne '') {
480: $allroles{$area}.=':'.$coursepriv;
481: }
482: }
483: }
484: }
485: } else {
486: $allroles{'/'}.=':'.$pr{$trole.':s'};
487: if ($tdomain ne '') {
488: $allroles{'/'.$tdomain.'/'}.=':'.$pr{$trole.':d'};
489: if ($trest ne '') {
490: $allroles{$area}.=':'.$pr{$trole.':c'};
491: }
492: }
493: }
494: }
495: }
496: } split(/&/,$rolesdump);
497: map {
498: %thesepriv=();
499: map {
500: if ($_ ne '') {
501: my ($priviledge,$restrictions)=split(/&/,$_);
502: if ($restrictions eq '') {
503: $thesepriv{$priviledge}='F';
504: } else {
505: if ($thesepriv{$priviledge} ne 'F') {
506: $thesepriv{$priviledge}.=$restrictions;
507: }
508: }
509: }
510: } split(/:/,$allroles{$_});
511: $thesestr='';
512: map { $thesestr.=':'.$_.'&'.$thesepriv{$_}; } keys %thesepriv;
513: $userroles.='user.priv.'.$_.'='.$thesestr."\n";
514: } keys %allroles;
515: }
516: return $userroles;
517: }
518:
519: # --------------------------------------------------------------- get interface
520:
521: sub get {
522: my ($namespace,@storearr)=@_;
523: my $items='';
524: map {
525: $items.=escape($_).'&';
526: } @storearr;
527: $items=~s/\&$//;
528: my $rep=reply("get:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
529: $ENV{'user.home'});
530: my @pairs=split(/\&/,$rep);
531: my %returnhash=();
532: map {
533: my ($key,$value)=split(/=/,$_);
534: $returnhash{unescape($key)}=unescape($value);
535: } @pairs;
536: return %returnhash;
537: }
538:
539: # --------------------------------------------------------------- del interface
540:
541: sub del {
542: my ($namespace,@storearr)=@_;
543: my $items='';
544: map {
545: $items.=escape($_).'&';
546: } @storearr;
547: $items=~s/\&$//;
548: return reply("del:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
549: $ENV{'user.home'});
550: }
551:
552: # -------------------------------------------------------------- dump interface
553:
554: sub dump {
555: my $namespace=shift;
556: my $rep=reply("dump:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace",
557: $ENV{'user.home'});
558: my @pairs=split(/\&/,$rep);
559: my %returnhash=();
560: map {
561: my ($key,$value)=split(/=/,$_);
562: $returnhash{unescape($key)}=unescape($value);
563: } @pairs;
564: return %returnhash;
565: }
566:
567: # --------------------------------------------------------------- put interface
568:
569: sub put {
570: my ($namespace,%storehash)=@_;
571: my $items='';
572: map {
573: $items.=escape($_).'='.escape($storehash{$_}).'&';
574: } keys %storehash;
575: $items=~s/\&$//;
576: return reply("put:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
577: $ENV{'user.home'});
578: }
579:
580: # -------------------------------------------------------------- eget interface
581:
582: sub eget {
583: my ($namespace,@storearr)=@_;
584: my $items='';
585: map {
586: $items.=escape($_).'&';
587: } @storearr;
588: $items=~s/\&$//;
589: my $rep=reply("eget:$ENV{'user.domain'}:$ENV{'user.name'}:$namespace:$items",
590: $ENV{'user.home'});
591: my @pairs=split(/\&/,$rep);
592: my %returnhash=();
593: map {
594: my ($key,$value)=split(/=/,$_);
595: $returnhash{unescape($key)}=unescape($value);
596: } @pairs;
597: return %returnhash;
598: }
599:
600: # ------------------------------------------------- Check for a user priviledge
601:
602: sub allowed {
603: my ($priv,$uri)=@_;
604: $uri=~s/^\/res//;
605: $uri=~s/^\///;
606:
607: # Free bre access to adm resources
608:
609: if (($uri=~/^adm\//) && ($priv eq 'bre')) {
610: return 'F';
611: }
612:
613: # Gather priviledges over system and domain
614:
615: my $thisallowed='';
616: if ($ENV{'user.priv./'}=~/$priv\&([^\:]*)/) {
617: $thisallowed.=$1;
618: }
619: if ($ENV{'user.priv./'.(split(/\//,$uri))[0].'/'}=~/$priv\&([^\:]*)/) {
620: $thisallowed.=$1;
621: }
622:
623: # Full access at system or domain level? Exit.
624:
625: if ($thisallowed=~/F/) {
626: return 'F';
627: }
628:
629: # The user does not have full access at system or domain level
630: # Course level access control
631:
632: # uri itself refering to a course?
633:
634: if ($uri=~/\.course$/) {
635: if ($ENV{'user.priv./'.$uri}=~/$priv\&([^\:]*)/) {
636: $thisallowed.=$1;
637: }
638: # Full access on course level? Exit.
639: if ($thisallowed=~/F/) {
640: return 'F';
641: }
642:
643: # uri is refering to an individual resource; user needs to be in a course
644:
645: } else {
646:
647: unless(defined($ENV{'request.course.uri'})) {
648: return '1';
649: }
650:
651: # Get access priviledges for course
652:
653: if ($ENV{'user.priv./'.$ENV{'request.course.uri'}}=~/$priv\&([^\:]*)/) {
654: $thisallowed.=$1;
655: }
656:
657: # See if resource or referer is part of this course
658:
659: my @uriparts=split(/\//,$uri);
660: my $urifile=$uriparts[$#uriparts];
661: $urifile=~/\.(\w+)$/;
662: my $uritype=$1;
663: $#uriparts--;
664: my $uripath=join('/',@uriparts);
665: my $uricond=-1;
666: if ($ENV{'acc.res.'.$ENV{'request.course'}.'.'.$uripath}=~
667: /\&$urifile\:(\d+)\&/) {
668: $uricond=$1;
669: } elsif (($fe{$uritype} eq 'emb') || ($fe{$uritype} eq 'img')) {
670: my $refuri=$ENV{'HTTP_REFERER'};
671: $refuri=~s/^\/res//;
672: $refuri=~s/^\///;
673: @uriparts=split(/\//,$refuri);
674: $urifile=$uriparts[$#uriparts];
675: $#uriparts--;
676: $uripath=join('/',@uriparts);
677: if ($ENV{'acc.res.'.$ENV{'request.course'}.'.'.$uripath}=~
678: /\&$urifile\:(\d+)\&/) {
679: $uricond=$1;
680: }
681: }
682:
683: if ($uricond>=0) {
684:
685: # The resource is part of the course
686: # If user had full access on course level, go ahead
687:
688: if ($thisallowed=~/F/) {
689: return 'F';
690: }
691:
692: # Restricted by state?
693:
694: if ($thisallowed=~/X/) {
695: if (&condval($uricond)>1) {
696: return '2';
697: } else {
698: return '';
699: }
700: }
701: }
702: }
703: return $thisallowed;
704: }
705:
706: # ---------------------------------------------------------- Refresh State Info
707:
708: sub refreshstate {
709: }
710:
711: # ----------------------------------------------------------------- Define Role
712:
713: sub definerole {
714: if (allowed('mcr','/')) {
715: my ($rolename,$sysrole,$domrole,$courole)=@_;
716: map {
717: my ($crole,$cqual)=split(/\&/,$_);
718: if ($pr{'cr:s'}!~/$crole/) { return "refused:s:$crole"; }
719: if ($pr{'cr:s'}=~/$crole\&/) {
720: if ($pr{'cr:s'}!~/$crole\&\w*$cqual/) {
721: return "refused:s:$crole&$cqual";
722: }
723: }
724: } split('/',$sysrole);
725: map {
726: my ($crole,$cqual)=split(/\&/,$_);
727: if ($pr{'cr:d'}!~/$crole/) { return "refused:d:$crole"; }
728: if ($pr{'cr:d'}=~/$crole\&/) {
729: if ($pr{'cr:d'}!~/$crole\&\w*$cqual/) {
730: return "refused:d:$crole&$cqual";
731: }
732: }
733: } split('/',$domrole);
734: map {
735: my ($crole,$cqual)=split(/\&/,$_);
736: if ($pr{'cr:c'}!~/$crole/) { return "refused:c:$crole"; }
737: if ($pr{'cr:c'}=~/$crole\&/) {
738: if ($pr{'cr:c'}!~/$crole\&\w*$cqual/) {
739: return "refused:c:$crole&$cqual";
740: }
741: }
742: } split('/',$courole);
743: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
744: "$ENV{'user.domain'}:$ENV{'user.name'}:".
745: "rolesdef_$rolename=".
746: escape($sysrole.'_'.$domrole.'_'.$courole);
747: return reply($command,$ENV{'user.home'});
748: } else {
749: return 'refused';
750: }
751: }
752:
753: # ------------------------------------------------------------------ Plain Text
754:
755: sub plaintext {
756: my $short=shift;
757: return $prp{$short};
758: }
759:
760: # ------------------------------------------------------------------ Plain Text
761:
762: sub fileembstyle {
763: my $ending=shift;
764: return $fe{$ending};
765: }
766:
767: # ------------------------------------------------------------ Description Text
768:
769: sub filedecription {
770: my $ending=shift;
771: return $fd{$ending};
772: }
773:
774: # ----------------------------------------------------------------- Assign Role
775:
776: sub assignrole {
777: my ($udom,$uname,$url,$role,$end,$start)=@_;
778: my $mrole;
779: $url=~s/^\///;
780: $url=~s/^res\///;
781: if ($role =~ /^cr\//) {
782: unless ($url=~/\.course$/) { return 'invalid'; }
783: unless (allowed('ccr',$url)) { return 'refused'; }
784: $mrole='cr';
785: } else {
786: unless (($url=~/\.course$/) || ($url=~/\/$/)) { return 'invalid'; }
787: unless (allowed('c'+$role)) { return 'refused'; }
788: $mrole=$role;
789: }
790: my $command="encrypt:rolesput:$ENV{'user.domain'}:$ENV{'user.name'}:".
791: "$udom:$uname:$url".'_'."$mrole=$role";
792: if ($end) { $command.='_$end'; }
793: if ($start) {
794: if ($end) {
795: $command.='_$start';
796: } else {
797: $command.='_0_$start';
798: }
799: }
800: return &reply($command,&homeserver($uname,$udom));
801: }
802:
803: # ---------------------------------------------------------- Assign Custom Role
804:
805: sub assigncustomrole {
806: my ($udom,$uname,$url,$rdom,$rnam,$rolename,$end,$start)=@_;
807: return &assignrole($udom,$uname,$url,'cr/'.$rdom.'/'.$rnam.'/'.$rolename,
808: $end,$start);
809: }
810:
811: # ----------------------------------------------------------------- Revoke Role
812:
813: sub revokerole {
814: my ($udom,$uname,$url,$role)=@_;
815: my $now=time;
816: return &assignrole($udom,$uname,$url,$role,$now);
817: }
818:
819: # ---------------------------------------------------------- Revoke Custom Role
820:
821: sub revokecustomrole {
822: my ($udom,$uname,$url,$rdom,$rnam,$rolename)=@_;
823: my $now=time;
824: return &assigncustomrole($udom,$uname,$url,$rdom,$rnam,$rolename,$now);
825: }
826:
827: # ------------------------------------------------------------ Directory lister
828:
829: sub dirlist {
830: my $uri=shift;
831: $uri=~s/^\///;
832: $uri=~s/\/$//;
833: my ($res,$udom,$uname,@rest)=split(/\//,$uri);
834: if ($udom) {
835: if ($uname) {
836: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/'.$uri,
837: homeserver($uname,$udom));
838: return split(/:/,$listing);
839: } else {
840: my $tryserver;
841: my %allusers=();
842: foreach $tryserver (keys %libserv) {
843: if ($hostdom{$tryserver} eq $udom) {
844: my $listing=reply('ls:'.$perlvar{'lonDocRoot'}.'/res/'.$udom,
845: $tryserver);
846: if (($listing ne 'no_such_dir') && ($listing ne 'empty')
847: && ($listing ne 'con_lost')) {
848: map {
849: my ($entry,@stat)=split(/&/,$_);
850: $allusers{$entry}=1;
851: } split(/:/,$listing);
852: }
853: }
854: }
855: my $alluserstr='';
856: map {
857: $alluserstr.=$_.'&user:';
858: } sort keys %allusers;
859: $alluserstr=~s/:$//;
860: return split(/:/,$alluserstr);
861: }
862: } else {
863: my $tryserver;
864: my %alldom=();
865: foreach $tryserver (keys %libserv) {
866: $alldom{$hostdom{$tryserver}}=1;
867: }
868: my $alldomstr='';
869: map {
870: $alldomstr.=$perlvar{'lonDocRoot'}.'/res/'.$_.'&domain:';
871: } sort keys %alldom;
872: $alldomstr=~s/:$//;
873: return split(/:/,$alldomstr);
874: }
875: }
876:
877: # -------------------------------------------------------- Value of a Condition
878:
879: sub condval {
880: my $condidx=shift;
881: my $result=0;
882: if ($ENV{'request.course'}) {
883: if (defined($ENV{'acc.cond.'.$ENV{'request.course'}.'.'.$condidx})) {
884: my $operand='|';
885: my @stack;
886: map {
887: if ($_ eq '(') {
888: push @stack,($operand,$result)
889: } elsif ($_ eq ')') {
890: my $before=pop @stack;
891: if (pop @stack eq '&') {
892: $result=$result>$before?$before:$result;
893: } else {
894: $result=$result>$before?$result:$before;
895: }
896: } elsif (($_ eq '&') || ($_ eq '|')) {
897: $operand=$_;
898: } else {
899: my $new=
900: substr($ENV{'user.state.'.$ENV{'request.course'}},$_,1);
901: if ($operand eq '&') {
902: $result=$result>$new?$new:$result;
903: } else {
904: $result=$result>$new?$result:$new;
905: }
906: }
907: } ($ENV{'acc.cond.'.$ENV{'request.course'}.'.'.$condidx}=~
908: /(\d+|\(|\)|\&|\|)/g);
909: }
910: }
911: return $result;
912: }
913:
914: # --------------------------------------------------------- Value of a Variable
915:
916: sub varval {
917: my ($realm,$space,@components)=split(/\./,shift);
918: my $value='';
919: if ($realm eq 'user') {
920: if ($space=~/^resource/) {
921: $space=~s/^resource\[//;
922: $space=~s/\]$//;
923:
924: } else {
925: }
926: } elsif ($realm eq 'course') {
927: } elsif ($realm eq 'session') {
928: } elsif ($realm eq 'system') {
929: }
930: return $value;
931: }
932:
933: # -------------------------------------------------------- Escape Special Chars
934:
935: sub escape {
936: my $str=shift;
937: $str =~ s/(\W)/"%".unpack('H2',$1)/eg;
938: return $str;
939: }
940:
941: # ----------------------------------------------------- Un-Escape Special Chars
942:
943: sub unescape {
944: my $str=shift;
945: $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
946: return $str;
947: }
948:
949: # ================================================================ Main Program
950:
951: sub BEGIN {
952: if ($readit ne 'done') {
953: # ------------------------------------------------------------ Read access.conf
954: {
955: my $config=Apache::File->new("/etc/httpd/conf/access.conf");
956:
957: while (my $configline=<$config>) {
958: if ($configline =~ /PerlSetVar/) {
959: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
960: chomp($varvalue);
961: $perlvar{$varname}=$varvalue;
962: }
963: }
964: }
965:
966: # ------------------------------------------------------------- Read hosts file
967: {
968: my $config=Apache::File->new("$perlvar{'lonTabDir'}/hosts.tab");
969:
970: while (my $configline=<$config>) {
971: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
972: $hostname{$id}=$name;
973: $hostdom{$id}=$domain;
974: if ($role eq 'library') { $libserv{$id}=$name; }
975: }
976: }
977:
978: # ------------------------------------------------------ Read spare server file
979: {
980: my $config=Apache::File->new("$perlvar{'lonTabDir'}/spare.tab");
981:
982: while (my $configline=<$config>) {
983: chomp($configline);
984: if (($configline) && ($configline ne $perlvar{'lonHostID'})) {
985: $spareid{$configline}=1;
986: }
987: }
988: }
989: # ------------------------------------------------------------ Read permissions
990: {
991: my $config=Apache::File->new("$perlvar{'lonTabDir'}/roles.tab");
992:
993: while (my $configline=<$config>) {
994: chomp($configline);
995: my ($role,$perm)=split(/ /,$configline);
996: if ($perm ne '') { $pr{$role}=$perm; }
997: }
998: }
999:
1000: # -------------------------------------------- Read plain texts for permissions
1001: {
1002: my $config=Apache::File->new("$perlvar{'lonTabDir'}/rolesplain.tab");
1003:
1004: while (my $configline=<$config>) {
1005: chomp($configline);
1006: my ($short,$plain)=split(/:/,$configline);
1007: if ($plain ne '') { $prp{$short}=$plain; }
1008: }
1009: }
1010:
1011: # ------------------------------------------------------------- Read file types
1012: {
1013: my $config=Apache::File->new("$perlvar{'lonTabDir'}/filetypes.tab");
1014:
1015: while (my $configline=<$config>) {
1016: chomp($configline);
1017: my ($ending,$emb,@descr)=split(/\s+/,$configline);
1018: if ($descr[0] ne '') {
1019: $fe{$ending}=$emb;
1020: $fd{$ending}=join(' ',@descr);
1021: }
1022: }
1023: }
1024:
1025:
1026: $readit='done';
1027: &logthis('<font color=yellow>INFO: Read configuration</font>');
1028: }
1029: }
1030: 1;
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