File:
[LON-CAPA] /
loncom /
auth /
lonacc.pm
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1.203:
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Sat Jun 18 02:10:18 2022 UTC (2 years, 3 months ago) by
raeburn
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MAIN
CVS tags:
HEAD
- Bug 6907
For LTI-protected deep links in which username is included in launch payload
compare username in payload with username for any existing LON-CAPA session
in current web browser and expire old session, if different user.
1: # The LearningOnline Network
2: # Cookie Based Access Handler
3: #
4: # $Id: lonacc.pm,v 1.203 2022/06/18 02:10:18 raeburn 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: ###
29:
30: =head1 NAME
31:
32: Apache::lonacc - Cookie Based Access Handler
33:
34: =head1 SYNOPSIS
35:
36: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
37:
38: PerlAccessHandler Apache::lonacc
39:
40: =head1 INTRODUCTION
41:
42: This module enables cookie based authentication and is used
43: to control access for many different LON-CAPA URIs.
44:
45: Whenever the client sends the cookie back to the server,
46: this cookie is handled by either lonacc.pm or loncacc.pm
47: (see srm.conf for what is invoked when). If
48: the cookie is missing or invalid, the user is re-challenged
49: for login information.
50:
51: This is part of the LearningOnline Network with CAPA project
52: described at http://www.lon-capa.org.
53:
54: =head1 HANDLER SUBROUTINE
55:
56: This routine is called by Apache and mod_perl.
57:
58: =over 4
59:
60: =item *
61:
62: transfer profile into environment
63:
64: =item *
65:
66: load POST parameters
67:
68: =item *
69:
70: check access
71:
72: =item *
73:
74: if allowed, get symb, log, generate course statistics if applicable
75:
76: =item *
77:
78: otherwise return error
79:
80: =item *
81:
82: see if public resource
83:
84: =item *
85:
86: store attempted access
87:
88: =back
89:
90: =head1 NOTABLE SUBROUTINES
91:
92: =cut
93:
94:
95: package Apache::lonacc;
96:
97: use strict;
98: use Apache::Constants qw(:common :http :methods);
99: use Apache::File;
100: use Apache::lonnet;
101: use Apache::loncommon();
102: use Apache::lonlocal;
103: use Apache::restrictedaccess();
104: use Apache::blockedaccess();
105: use Apache::lonprotected();
106: use Fcntl qw(:flock);
107: use LONCAPA qw(:DEFAULT :match);
108:
109: sub cleanup {
110: my ($r)=@_;
111: if (! $r->is_initial_req()) { return DECLINED; }
112: &Apache::lonnet::save_cache();
113: return OK;
114: }
115:
116: sub goodbye {
117: my ($r)=@_;
118: &Apache::lonnet::goodbye();
119: return DONE;
120: }
121:
122: ###############################################
123:
124: sub get_posted_cgi {
125: my ($r,$fields) = @_;
126:
127: my $buffer;
128: if ($r->header_in('Content-length')) {
129: $r->read($buffer,$r->header_in('Content-length'),0);
130: }
131: my $content_type = $r->header_in('Content-type');
132: if ($content_type !~ m{^multipart/form-data}) {
133: my @pairs=split(/&/,$buffer);
134: my $pair;
135: foreach $pair (@pairs) {
136: my ($name,$value) = split(/=/,$pair);
137: $value =~ tr/+/ /;
138: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
139: $name =~ tr/+/ /;
140: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
141: if (ref($fields) eq 'ARRAY') {
142: next if (!grep(/^\Q$name\E$/,@{$fields}));
143: }
144: &Apache::loncommon::add_to_env("form.$name",$value);
145: }
146: } else {
147: my ($contentsep) = ($content_type =~ /boundary=\"?([^\";,]+)\"?/);
148: my @lines = split (/\n/,$buffer);
149: my $name='';
150: my $value='';
151: my $fname='';
152: my $fmime='';
153: my $i;
154: for ($i=0;$i<=$#lines;$i++) {
155: if ($lines[$i]=~/^--\Q$contentsep\E/) {
156: if ($name) {
157: chomp($value);
158: if (($r->uri eq '/adm/portfolio') &&
159: ($name eq 'uploaddoc')) {
160: if (length($value) == 1) {
161: $value=~s/[\r\n]$//;
162: }
163: }
164: if ($fname =~ /\.(xls|doc|ppt)(x|m)$/i) {
165: $value=~s/[\r\n]$//;
166: }
167: if (ref($fields) eq 'ARRAY') {
168: next if (!grep(/^\Q$name\E$/,@{$fields}));
169: }
170: if ($fname) {
171: if ($env{'form.symb'} ne '') {
172: my $size = (length($value))/(1024.0 * 1024.0);
173: if (&upload_size_allowed($name,$size,$fname) eq 'ok') {
174: $env{"form.$name.filename"}=$fname;
175: $env{"form.$name.mimetype"}=$fmime;
176: &Apache::loncommon::add_to_env("form.$name",$value);
177: }
178: } else {
179: $env{"form.$name.filename"}=$fname;
180: $env{"form.$name.mimetype"}=$fmime;
181: &Apache::loncommon::add_to_env("form.$name",$value);
182: }
183: } else {
184: $value=~s/\s+$//s;
185: &Apache::loncommon::add_to_env("form.$name",$value);
186: }
187: }
188: if ($i<$#lines) {
189: $i++;
190: $lines[$i]=~
191: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
192: $name=$1;
193: $value='';
194: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
195: $fname=$1;
196: if
197: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
198: $fmime=$1;
199: $i++;
200: } else {
201: $fmime='';
202: }
203: } else {
204: $fname='';
205: $fmime='';
206: }
207: if ($i<$#lines && $lines[$i+1]=~/^Content\-Type\:\s*([\w\-\/]+)/i) {
208: # TODO: something with $1 !
209: $i++;
210: }
211: if ($i<$#lines && $lines[$i+1]=~/^Content\-transfer\-encoding\:\s*([\w\-\/]+)/i) {
212: # TODO: something with $1 !
213: $i++;
214: }
215: $i++;
216: }
217: } else {
218: $value.=$lines[$i]."\n";
219: }
220: }
221: }
222: #
223: # Digested POSTed values
224: #
225: # Remember the way this was originally done (GET or POST)
226: #
227: $env{'request.method'}=$ENV{'REQUEST_METHOD'};
228: #
229: # There may also be stuff in the query string
230: # Tell subsequent handlers that this was GET, not POST, so they can access query string.
231: # Also, unset POSTed content length to cover all tracks.
232: #
233:
234: $r->method_number(M_GET);
235:
236: $r->method('GET');
237: $r->headers_in->unset('Content-length');
238: }
239:
240: =pod
241:
242: =over
243:
244: =item upload_size_allowed()
245:
246: Perform size checks for file uploads to essayresponse items in course context.
247:
248: Add form.HWFILESIZE.$part_$id to %env with file size (MB)
249: If file exceeds maximum allowed size, add form.HWFILETOOBIG.$part_$id to %env.
250:
251: =cut
252:
253: sub upload_size_allowed {
254: my ($name,$size,$fname) = @_;
255: if ($name =~ /^HWFILE(\w+)$/) {
256: my $ident = $1;
257: my $item = 'HWFILESIZE'.$ident;
258: my $savesize = sprintf("%.6f",$size);
259: &Apache::loncommon::add_to_env("form.$item",$savesize);
260: my $maxsize= &Apache::lonnet::EXT("resource.$ident.maxfilesize");
261: if (!$maxsize) {
262: $maxsize = 10.0; # FIXME This should become a domain configuration.
263: }
264: if ($size > $maxsize) {
265: my $warn = 'HWFILETOOBIG'.$ident;
266: &Apache::loncommon::add_to_env("form.$warn",$fname);
267: return;
268: }
269: }
270: return 'ok';
271: }
272:
273: =pod
274:
275: =item sso_login()
276:
277: handle the case of the single sign on user, at this point $r->user
278: will be set and valid; now need to find the loncapa user info, and possibly
279: balance them. If $r->user() is set this means either it was either set by
280: SSO or by checkauthen.pm, if a valid cookie was found. The latter case can
281: be identified by the third arg ($usename), except when lonacc is called in
282: an internal redirect to /adm/switchserver (e.g., load-balancing following
283: successful authentication) -- no cookie set yet. For that particular case
284: simply skip the call to sso_login().
285:
286: returns OK if it was SSO and user was handled.
287: returns undef if not SSO or no means to handle the user.
288:
289: In the case where the session was started from /adm/launch/tiny/$domain/$id,
290: i.e., for a protected link, with launch from another CMS, and user information
291: is accepted from the LTI payload, then, if the user has privileged roles,
292: authentication will be required. If SSO authentication is with a username
293: and/or domain that differ from the username in the LTI payload and domain
294: in the launch URL, then $r->user() will be unset and /adm/relaunch will be
295: called.
296:
297: =cut
298:
299: sub sso_login {
300: my ($r,$handle,$username) = @_;
301:
302: if (($r->user eq '') || ($username ne '') || ($r->user eq 'public:public') ||
303: (defined($env{'user.name'}) && (defined($env{'user.domain'}))
304: && ($handle ne ''))) {
305: # not an SSO case or already logged in
306: return undef;
307: }
308:
309: my ($user) = ($r->user =~ m/^($match_username)$/);
310: if ($user eq '') {
311: return undef;
312: }
313:
314: my $query = $r->args;
315: my %form;
316: if ($query) {
317: my @items = ('role','symb','iptoken','origurl','ttoken',
318: 'ltoken','linkkey','logtoken','sso');
319: &Apache::loncommon::get_unprocessed_cgi($query,\@items);
320: foreach my $item (@items) {
321: if (defined($env{'form.'.$item})) {
322: $form{$item} = $env{'form.'.$item};
323: }
324: }
325: }
326:
327: my %sessiondata;
328: if ($form{'iptoken'}) {
329: %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
330: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
331: unless ($sessiondata{'sessionserver'}) {
332: delete($form{'iptoken'});
333: }
334: }
335:
336: my ($linkprot,$linkprotuser,$linkkey,$deeplinkurl);
337:
338: #
339: # If Shibboleth auth is in use, and a dual SSO and non-SSO login page
340: # is in use, then the query string will contain the logtoken item with
341: # a value set to the name of a .tmp file in /home/httpd/perl/tmp
342: # containing the url to display after authentication, and also,
343: # optionally, role and symb, or linkprot or linkkey (deep-link access).
344: #
345: # If Shibboleth auth is in use, but a dual log-in page is not in use,
346: # and the originally requested URL was /tiny/$domain/$id (i.e.,
347: # for deeplinking), then the query string will contain the sso item
348: # with a value set to the name of a .tmp file in /home/httpd/perl/tmp
349: # containing the url to display after authentication, and also,
350: # optionally, linkprot or linkkey (deep-link access).
351: #
352: # Otherwise the query string may contain role and symb, or if the
353: # originally requested URL was /tiny/$domain/$id (i.e. for deeplinking)
354: # then the query string may contain a ttoken item with a value set
355: # to the name of a .tmp file in /home/httpd/perl/tmp containing either
356: # linkprot or linkkey (deep-link access).
357: #
358: # If deep-linked, i.e., the originally requested URL was /tiny/$domain/$id
359: # the linkkey may have originally been sent in POSTed data, which will
360: # have been processed in lontrans.pm
361: #
362:
363: if ($form{'ttoken'}) {
364: my %info = &Apache::lonnet::tmpget($form{'ttoken'});
365: &Apache::lonnet::tmpdel($form{'ttoken'});
366: if ($info{'origurl'}) {
367: $form{'origurl'} = $info{'origurl'};
368: if ($form{'origurl'} =~ m{^/tiny/$match_domain/\w+$}) {
369: $deeplinkurl = $form{'origurl'};
370: }
371: }
372: if ($info{'linkprot'}) {
373: $linkprot = $info{'linkprot'};
374: $linkprotuser = $info{'linkprotuser'};
375: } elsif ($info{'linkkey'} ne '') {
376: $linkkey = $info{'linkkey'};
377: }
378: } elsif ($form{'logtoken'}) {
379: my ($firsturl,@rest);
380: my $lonhost = $r->dir_config('lonHostID');
381: my $tmpinfo = &Apache::lonnet::reply('tmpget:'.$form{'logtoken'},$lonhost);
382: my $delete = &Apache::lonnet::tmpdel($form{'logtoken'});
383: unless (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
384: ($tmpinfo eq 'no_such_host')) {
385: (undef,$firsturl,@rest) = split(/&/,$tmpinfo);
386: if ($firsturl ne '') {
387: $firsturl = &unescape($firsturl);
388: }
389: foreach my $item (@rest) {
390: my ($key,$value) = split(/=/,$item);
391: $form{$key} = &unescape($value);
392: }
393: if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) {
394: $form{'origurl'} = $firsturl;
395: $deeplinkurl = $firsturl;
396: }
397: if ($form{'linkprot'}) {
398: $linkprot = $form{'linkprot'};
399: $linkprotuser = $form{'linkprotuser'};
400: } elsif ($form{'linkkey'} ne '') {
401: $linkkey = $form{'linkkey'};
402: }
403: if ($form{'iptoken'}) {
404: %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
405: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
406: }
407: }
408: } elsif ($form{'sso'}) {
409: my $lonhost = $r->dir_config('lonHostID');
410: my $info = &Apache::lonnet::reply('tmpget:'.$form{'sso'},$lonhost);
411: &Apache::lonnet::tmpdel($form{'sso'});
412: unless (($info=~/^error/) || ($info eq 'con_lost') ||
413: ($info eq 'no_such_host')) {
414: my ($firsturl,@rest)=split(/\&/,$info);
415: if ($firsturl ne '') {
416: $form{'origurl'} = &unescape($firsturl);
417: if ($form{'origurl'} =~ m{^/tiny/$match_domain/\w+$}) {
418: $deeplinkurl = $form{'origurl'};
419: }
420: }
421: foreach my $item (@rest) {
422: my ($key,$value) = split(/=/,$item);
423: $form{$key} = &unescape($value);
424: }
425: if ($form{'linkprot'}) {
426: $linkprot = $form{'linkprot'};
427: $linkprotuser = $form{'linkprotuser'};
428: } elsif ($form{'linkkey'} ne '') {
429: $linkkey = $form{'linkkey'};
430: }
431: }
432: } elsif ($form{'ltoken'}) {
433: my %link_info = &Apache::lonnet::tmpget($form{'ltoken'});
434: $linkprot = $link_info{'linkprot'};
435: if (($linkprot) && ($link_info{'linkprotuser'} ne '')) {
436: $linkprotuser = $link_info{'linkprotuser'};
437: }
438: my $delete = &Apache::lonnet::tmpdel($form{'ltoken'});
439: delete($form{'ltoken'});
440: if ($form{'origurl'} =~ m{^/tiny/$match_domain/\w+$}) {
441: $deeplinkurl = $form{'origurl'};
442: }
443: } elsif ($form{'linkkey'} ne '') {
444: $linkkey = $form{'linkkey'};
445: }
446:
447: my $domain = $r->dir_config('lonSSOUserDomain');
448: if ($domain eq '') {
449: $domain = $r->dir_config('lonDefDomain');
450: }
451: if (($deeplinkurl) && ($linkprot) && ($linkprotuser ne '')) {
452: unless ($linkprotuser eq $user.':'.$domain) {
453: $r->user();
454: my %data = (
455: origurl => $deeplinkurl,
456: linkprot => $linkprot,
457: linkprotuser => $linkprotuser,
458: );
459: my $token = &Apache::lonnet::tmpput(\%data,$r->dir_config('lonHostID'),'link');
460: unless (($token eq 'con_lost') || ($token eq 'refused') || ($token =~ /^error:/) ||
461: ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
462: $r->internal_redirect('/adm/relaunch?rtoken='.$token);
463: $r->set_handlers('PerlHandler'=> undef);
464: return OK;
465: }
466: }
467: }
468: my $home=&Apache::lonnet::homeserver($user,$domain);
469: if ($home !~ /(con_lost|no_host|no_such_host)/) {
470: &Apache::lonnet::logthis(" SSO authorized user $user ");
471: my ($is_balancer,$otherserver,$hosthere);
472: if ($form{'iptoken'}) {
473: if (($sessiondata{'domain'} eq $domain) &&
474: ($sessiondata{'username'} eq $user)) {
475: $hosthere = 1;
476: }
477: }
478: unless ($hosthere) {
479: ($is_balancer,$otherserver) =
480: &Apache::lonnet::check_loadbalancing($user,$domain,'login');
481: if ($is_balancer) {
482: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
483: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
484: if (($found_server) && ($balancer_cookie =~ /^\Q$domain\E_\Q$user\E_/)) {
485: $otherserver = $found_server;
486: } elsif ($otherserver eq '') {
487: my $lowest_load;
488: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($domain);
489: if ($lowest_load > 100) {
490: $otherserver = &Apache::lonnet::spareserver($r,$lowest_load,$lowest_load,1,$domain);
491: }
492: if ($otherserver ne '') {
493: my @hosts = &Apache::lonnet::current_machine_ids();
494: if (grep(/^\Q$otherserver\E$/,@hosts)) {
495: $hosthere = $otherserver;
496: }
497: }
498: }
499: }
500: }
501: if (($is_balancer) && (!$hosthere)) {
502: # login but immediately go to switch server to find us a new
503: # machine
504: &Apache::lonauth::success($r,$user,$domain,$home,'noredirect');
505: foreach my $item (keys(%form)) {
506: $env{'form.'.$item} = $form{$item};
507: }
508: unless (($form{'symb'}) || ($form{'origurl'})) {
509: unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
510: $env{'form.origurl'} = $r->uri;
511: }
512: }
513: if (($r->uri eq '/adm/sso') && ($form{'origurl'} =~ m{^/+tiny/+$match_domain/+\w+$})) {
514: $env{'request.deeplink.login'} = $form{'origurl'};
515: } elsif ($r->uri =~ m{^/+tiny/+$match_domain/+\w+$}) {
516: $env{'request.deeplink.login'} = $r->uri;
517: }
518: if ($env{'request.deeplink.login'}) {
519: if ($linkprot) {
520: $env{'request.linkprot'} = $linkprot;
521: if ($linkprotuser ne '') {
522: $env{'request.linkprotuser'} = $linkprotuser;
523: }
524: } elsif ($linkkey ne '') {
525: $env{'request.linkkey'} = $linkkey;
526: }
527: }
528: $env{'request.sso.login'} = 1;
529: if (defined($r->dir_config("lonSSOReloginServer"))) {
530: $env{'request.sso.reloginserver'} =
531: $r->dir_config('lonSSOReloginServer');
532: }
533: my $redirecturl = '/adm/switchserver';
534: if ($otherserver ne '') {
535: $redirecturl .= '?otherserver='.$otherserver;
536: }
537: $r->internal_redirect($redirecturl);
538: $r->set_handlers('PerlHandler'=> undef);
539: } else {
540: # need to login them in, so generate the need data that
541: # migrate expects to do login
542: my $ip = &Apache::lonnet::get_requestor_ip($r);
543: my %info=('ip' => $ip,
544: 'domain' => $domain,
545: 'username' => $user,
546: 'server' => $r->dir_config('lonHostID'),
547: 'sso.login' => 1
548: );
549: foreach my $item ('role','symb','iptoken','origurl') {
550: if (exists($form{$item})) {
551: $info{$item} = $form{$item};
552: } elsif ($sessiondata{$item} ne '') {
553: $info{$item} = $sessiondata{$item};
554: }
555: }
556: unless (($info{'symb'}) || ($info{'origurl'})) {
557: unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
558: $info{'origurl'} = $r->uri;
559: }
560: }
561: if (($r->uri eq '/adm/sso') && ($form{'origurl'} =~ m{^/+tiny/+$match_domain/+\w+$})) {
562: $info{'deeplink.login'} = $form{'origurl'};
563: } elsif ($r->uri =~ m{^/+tiny/+$match_domain/+\w+$}) {
564: $info{'deeplink.login'} = $r->uri;
565: }
566: if ($info{'deeplink.login'}) {
567: if ($linkprot) {
568: $info{'linkprot'} = $linkprot;
569: } elsif ($linkkey ne '') {
570: $info{'linkkey'} = $linkkey;
571: }
572: }
573: if ($r->dir_config("ssodirecturl") == 1) {
574: $info{'origurl'} = $r->uri;
575: }
576: if (defined($r->dir_config("lonSSOReloginServer"))) {
577: $info{'sso.reloginserver'} =
578: $r->dir_config('lonSSOReloginServer');
579: }
580: if (($is_balancer) && ($hosthere)) {
581: $info{'noloadbalance'} = $hosthere;
582: }
583: my $token = &Apache::lonnet::tmpput(\%info,$r->dir_config('lonHostID'),'sso');
584: $env{'form.token'} = $token;
585: $r->internal_redirect('/adm/migrateuser');
586: $r->set_handlers('PerlHandler'=> undef);
587: }
588: return OK;
589: } else {
590: &Apache::lonnet::logthis(" SSO authorized unknown user $user ");
591: my @cancreate;
592: my %domconfig =
593: &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
594: if (ref($domconfig{'usercreation'}) eq 'HASH') {
595: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
596: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
597: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
598: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
599: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
600: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
601: }
602: }
603: }
604: if ((grep(/^sso$/,@cancreate)) || (defined($r->dir_config('lonSSOUserUnknownRedirect')))) {
605: $r->subprocess_env->set('SSOUserUnknown' => $user);
606: $r->subprocess_env->set('SSOUserDomain' => $domain);
607: if (grep(/^sso$/,@cancreate)) {
608: #FIXME - need to preserve origurl, role and symb, or linkprot or linkkey for use after account
609: # creation
610: $r->set_handlers('PerlHandler'=> [\&Apache::createaccount::handler]);
611: $r->handler('perl-script');
612: } else {
613: $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
614: $r->set_handlers('PerlHandler'=> undef);
615: }
616: return OK;
617: }
618: }
619: return undef;
620: }
621:
622: sub handler {
623: my $r = shift;
624: my $requrl=$r->uri;
625:
626: if ($requrl =~ m{^/res/adm/pages/[^/]+\.(gif|png)$}) {
627: return OK;
628: }
629:
630: if (&Apache::lonnet::is_domainimage($requrl)) {
631: return OK;
632: }
633:
634: my %user;
635: my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);
636:
637: unless (($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) {
638: my $result = &sso_login($r,$handle,$user{'name'});
639: if (defined($result)) {
640: return $result;
641: }
642: }
643:
644: my ($is_balancer,$otherserver);
645:
646: if ($handle eq '') {
647: unless ((($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) ||
648: ($requrl =~ m{^/public/$match_domain/$match_courseid/syllabus}) ||
649: ($requrl =~ m{^/adm/help/}) || ($requrl eq '/adm/sso') ||
650: ($requrl =~ m{^/res/$match_domain/$match_username/})) {
651: $r->log_reason("Cookie not valid", $r->filename);
652: }
653: } elsif ($handle ne '') {
654:
655: # ------------------------------------------------------ Initialize Environment
656: my $lonidsdir=$r->dir_config('lonIDsDir');
657: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
658:
659: # --------------------------------------------------------- Initialize Language
660:
661: &Apache::lonlocal::get_language_handle($r);
662:
663: }
664:
665: # -------------------------------------------------- Should be a valid user now
666: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
667: # -------------------------------------------------------------- Resource State
668:
669: my ($cdom,$cnum);
670: if ($env{'request.course.id'}) {
671: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
672: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
673: }
674: if ($requrl=~/^\/+(res|uploaded)\//) {
675: $env{'request.state'} = "published";
676: } else {
677: $env{'request.state'} = 'unknown';
678: }
679: $env{'request.filename'} = $r->filename;
680: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
681: my ($suppext,$checkabsolute);
682: if ($requrl =~ m{^/adm/wrapper/ext/}) {
683: my $query = $r->args;
684: if ($query) {
685: my $preserved;
686: foreach my $pair (split(/&/,$query)) {
687: my ($name, $value) = split(/=/,$pair);
688: unless (($name eq 'symb') || ($name eq 'usehttp')) {
689: $preserved .= $pair.'&';
690: }
691: if (($env{'request.course.id'}) && ($name eq 'folderpath')) {
692: if ($value =~ /^supplemental/) {
693: $suppext = 1;
694: }
695: }
696: }
697: $preserved =~ s/\&$//;
698: if ($preserved) {
699: $env{'request.external.querystring'} = $preserved;
700: }
701: }
702: if ($env{'request.course.id'}) {
703: $checkabsolute = 1;
704: }
705: } elsif ($env{'request.course.id'} &&
706: (($requrl =~ m{^/adm/$match_domain/$match_username/aboutme$}) ||
707: ($requrl eq "/public/$cdom/$cnum/syllabus") ||
708: ($requrl =~ m{^/adm/$cdom/$cnum/\d+/ext\.tool$}))) {
709: my $query = $r->args;
710: if ($query) {
711: foreach my $pair (split(/&/,$query)) {
712: my ($name, $value) = split(/=/,$pair);
713: if ($name eq 'folderpath') {
714: if ($value =~ /^supplemental/) {
715: $suppext = 1;
716: }
717: last;
718: }
719: }
720: }
721: if ($requrl =~ m{^/public/$cdom/$cnum/syllabus$}) {
722: $checkabsolute = 1;
723: }
724: }
725: if ($checkabsolute) {
726: my $hostname = $r->hostname();
727: my $lonhost = &Apache::lonnet::host_from_dns($hostname);
728: if ($lonhost) {
729: my $actual = &Apache::lonnet::absolute_url($hostname,1,1);
730: my $exphostname = &Apache::lonnet::hostname($lonhost);
731: my $expected = $Apache::lonnet::protocol{$lonhost}.'://'.$hostname;
732: unless ($actual eq $expected) {
733: $env{'request.use_absolute'} = $expected;
734: }
735: }
736: }
737: # -------------------------------------------------------- Load POST parameters
738:
739: &Apache::lonacc::get_posted_cgi($r);
740:
741: # ------------------------------------------------------ Check if load balancer
742:
743: my $checkexempt;
744: if ($env{'user.loadbalexempt'} eq $r->dir_config('lonHostID')) {
745: if ($env{'user.loadbalcheck.time'} + 600 > time) {
746: $checkexempt = 1;
747: }
748: }
749: if ($env{'user.noloadbalance'} eq $r->dir_config('lonHostID')) {
750: $checkexempt = 1;
751: }
752: unless (($checkexempt) || (($requrl eq '/adm/switchserver') && (!$r->is_initial_req()))) {
753: ($is_balancer,$otherserver) =
754: &Apache::lonnet::check_loadbalancing($env{'user.name'},
755: $env{'user.domain'});
756: if ($is_balancer) {
757: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
758: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
759: if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
760: $otherserver = $found_server;
761: }
762: unless ($requrl eq '/adm/switchserver') {
763: $r->set_handlers('PerlResponseHandler'=>
764: [\&Apache::switchserver::handler]);
765: }
766: if ($otherserver ne '') {
767: $env{'form.otherserver'} = $otherserver;
768: }
769: unless (($env{'form.origurl'}) || ($r->uri eq '/adm/roles') ||
770: ($r->uri eq '/adm/switchserver') || ($r->uri eq '/adm/sso')) {
771: $env{'form.origurl'} = $r->uri;
772: }
773: }
774: }
775: if ($requrl=~m{^/+tiny/+$match_domain/+\w+$}) {
776: if ($r->args) {
777: &Apache::loncommon::get_unprocessed_cgi($r->args,['ttoken']);
778: if (defined($env{'form.ttoken'})) {
779: my %info = &Apache::lonnet::tmpget($env{'form.ttoken'});
780: if (($info{'linkprotuser'} ne '') && ($info{'origurl'} ne '')) {
781: if (($info{'linkprot'}) && ($info{'origurl'} eq $requrl) &&
782: ($info{'linkprotuser'} ne $env{'user.name'}.':'.$env{'user.domain'})) {
783: my %data = (
784: origurl => $requrl,
785: linkprot => $info{'linkprot'},
786: linkprotuser => $info{'linkprotuser'},
787: );
788: my $token =
789: &Apache::lonnet::tmpput(\%data,$r->dir_config('lonHostID'),'retry');
790: unless (($token eq 'con_lost') || ($token eq 'refused') || ($token =~ /^error:/) ||
791: ($token eq 'unknown_cmd') || ($token eq 'no_such_host')) {
792: $r->internal_redirect('/adm/relaunch?rtoken='.$token);
793: $r->set_handlers('PerlHandler'=> undef);
794: return OK;
795: }
796: }
797: }
798: }
799: }
800: if ($env{'user.name'} eq 'public' &&
801: $env{'user.domain'} eq 'public') {
802: $env{'request.firsturl'}=$requrl;
803: return FORBIDDEN;
804: }
805: return OK;
806: }
807: # ---------------------------------------------------------------- Check access
808: my $now = time;
809: my ($check_symb,$check_access,$check_block,$access,$poss_symb);
810: if ($requrl !~ m{^/(?:adm|public|(?:prt|zip)spool)/}
811: || $requrl =~ /^\/adm\/.*\/(smppg|bulletinboard)(\?|$ )/x) {
812: $check_access = 1;
813: }
814: if ((!$check_access) && ($env{'request.course.id'})) {
815: if (($requrl eq '/adm/viewclasslist') ||
816: ($requrl =~ m{^(/adm/wrapper|)\Q/uploaded/$cdom/$cnum/docs/\E}) ||
817: ($requrl =~ m{^/adm/.*/aboutme$}) ||
818: ($requrl=~m{^/adm/coursedocs/showdoc/}) ||
819: ($requrl=~m{^(/adm/wrapper|)/adm/$cdom/$cnum/\d+/ext\.tool$})) {
820: $check_block = 1;
821: }
822: }
823: if (($env{'request.course.id'}) && (!$suppext)) {
824: $requrl=~/\.(\w+)$/;
825: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
826: ($requrl=~/^\/adm\/.*\/(aboutme|smppg|bulletinboard)(\?|$ )/x) ||
827: ($requrl=~/^\/adm\/wrapper\//) ||
828: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
829: ($requrl=~m|\.problem/smpedit$|) ||
830: ($requrl=~/^\/public\/.*\/syllabus$/) ||
831: ($requrl=~/^\/adm\/(viewclasslist|navmaps)$/) ||
832: ($requrl=~/^\/adm\/.*\/aboutme\/portfolio(\?|$)/) ||
833: ($requrl=~m{^/adm/$cdom/$cnum/\d+/ext\.tool$})) {
834: $check_symb = 1;
835: }
836: }
837: if (($check_access) || ($check_block)) {
838: if ($check_symb) {
839: if ($env{'form.symb'}) {
840: $poss_symb=&Apache::lonnet::symbclean($env{'form.symb'});
841: } elsif (($env{'request.course.id'}) && ($r->args ne '')) {
842: my $query = $r->args;
843: foreach my $pair (split(/&/,$query)) {
844: my ($name, $value) = split(/=/,$pair);
845: $name = &unescape($name);
846: $value =~ tr/+/ /;
847: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
848: if ($name eq 'symb') {
849: $poss_symb = &Apache::lonnet::symbclean($value);
850: last;
851: }
852: }
853: }
854: if ($poss_symb) {
855: my ($possmap,$resid,$url)=&Apache::lonnet::decode_symb($poss_symb);
856: $url = &Apache::lonnet::clutter($url);
857: my $toplevelmap = $env{'course.'.$env{'request.course.id'}.'.url'};
858: unless (($url eq $requrl) && (($possmap eq $toplevelmap) ||
859: (&Apache::lonnet::is_on_map($possmap)))) {
860: undef($poss_symb);
861: }
862: if ($poss_symb) {
863: if ((!$env{'request.role.adv'}) && ($env{'acc.randomout'}) &&
864: ($env{'acc.randomout'}=~/\&\Q$poss_symb\E\&/)) {
865: undef($poss_symb);
866: } elsif ((!$env{'request.role.adv'}) && ($env{'acc.deeplinkout'}) &&
867: ($env{'acc.deeplinkout'}=~/\&\Q$poss_symb\E\&/)) {
868: undef($poss_symb);
869: }
870: }
871: }
872: if ($poss_symb) {
873: $access=&Apache::lonnet::allowed('bre',$requrl,$poss_symb);
874: } else {
875: $access=&Apache::lonnet::allowed('bre',$requrl,'','','','',1);
876: }
877: } else {
878: my $nodeeplinkcheck;
879: if (($check_access) && ($requrl =~ /\.(sequence|page)$/)) {
880: unless ($env{'form.navmap'}) {
881: if ($r->args ne '') {
882: &Apache::loncommon::get_unprocessed_cgi($r->args,['navmap']);
883: unless ($env{'form.navmap'}) {
884: $nodeeplinkcheck = 1;
885: }
886: }
887: }
888: }
889: my $clientip = &Apache::lonnet::get_requestor_ip($r);
890: $access=&Apache::lonnet::allowed('bre',$requrl,'','',$clientip,'','',$nodeeplinkcheck);
891: }
892: }
893: if ($check_block) {
894: if ($access eq 'B') {
895: if ($poss_symb) {
896: if (&Apache::lonnet::symbverify($poss_symb,$requrl)) {
897: $env{'request.symb'} = $poss_symb;
898: }
899: }
900: &Apache::blockedaccess::setup_handler($r);
901: return OK;
902: }
903: } elsif ($check_access) {
904: if ($handle eq '') {
905: unless ($access eq 'F') {
906: if ($requrl =~ m{^/res/$match_domain/$match_username/}) {
907: $r->log_reason("Cookie not valid", $r->filename);
908: }
909: }
910: }
911: if ($access eq '1') {
912: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
913: return HTTP_NOT_ACCEPTABLE;
914: }
915: if ($access eq 'A') {
916: &Apache::restrictedaccess::setup_handler($r);
917: return OK;
918: }
919: if ($access eq 'B') {
920: if ($poss_symb) {
921: if (&Apache::lonnet::symbverify($poss_symb,$requrl)) {
922: $env{'request.symb'} = $poss_symb;
923: }
924: }
925: &Apache::blockedaccess::setup_handler($r);
926: return OK;
927: }
928: if ($access eq 'D') {
929: &Apache::lonprotected::setup_handler($r);
930: return OK;
931: }
932: if (($access ne '2') && ($access ne 'F')) {
933: if ($requrl =~ m{^/res/}) {
934: $access = &Apache::lonnet::allowed('bro',$requrl);
935: if ($access ne 'F') {
936: if ($requrl eq '/res/lib/templates/simpleproblem.problem/smpedit') {
937: $access = &Apache::lonnet::allowed('bre','/res/lib/templates/simpleproblem.problem');
938: if ($access ne 'F') {
939: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
940: return HTTP_NOT_ACCEPTABLE;
941: }
942: } else {
943: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
944: return HTTP_NOT_ACCEPTABLE;
945: }
946: }
947: } elsif (($handle =~ /^publicuser_\d+$/) && (&Apache::lonnet::is_portfolio_url($requrl))) {
948: my $clientip = &Apache::lonnet::get_requestor_ip($r);
949: if (&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip) ne 'F') {
950: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
951: return HTTP_NOT_ACCEPTABLE;
952: }
953: } else {
954: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
955: return HTTP_NOT_ACCEPTABLE;
956: }
957: }
958: }
959: if ($requrl =~ m|^/prtspool/|) {
960: my $start='/prtspool/'.$env{'user.name'}.'_'.
961: $env{'user.domain'};
962: if ($requrl !~ /^\Q$start\E/) {
963: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
964: return HTTP_NOT_ACCEPTABLE;
965: }
966: }
967: if ($requrl =~ m|^/zipspool/|) {
968: my $start='/zipspool/zipout/'.$env{'user.name'}.":".
969: $env{'user.domain'};
970: if ($requrl !~ /^\Q$start\E/) {
971: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
972: return HTTP_NOT_ACCEPTABLE;
973: }
974: }
975: if ($env{'user.name'} eq 'public' &&
976: $env{'user.domain'} eq 'public' &&
977: $requrl !~ m{^/+(res|public|uploaded)/} &&
978: $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
979: $requrl !~ m{^/adm/blockingstatus/.*$} &&
980: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
981: $env{'request.querystring'}=$r->args;
982: $env{'request.firsturl'}=$requrl;
983: return FORBIDDEN;
984: }
985: # ------------------------------------------------------------- This is allowed
986: if ($env{'request.course.id'}) {
987: &Apache::lonnet::countacc($requrl);
988: my $query=$r->args;
989: if ($check_symb) {
990: # ------------------------------------- This is serious stuff, get symb and log
991: my $symb;
992: if ($query) {
993: &Apache::loncommon::get_unprocessed_cgi($query,['symb','folderpath']);
994: }
995: if ($env{'form.symb'}) {
996: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
997: if (($requrl eq '/adm/navmaps') ||
998: ($requrl =~ m{^/adm/wrapper/}) ||
999: ($requrl =~ m{^/adm/coursedocs/showdoc/})) {
1000: unless (&Apache::lonnet::symbverify($symb,$requrl)) {
1001: if (&Apache::lonnet::is_on_map($requrl)) {
1002: $symb = &Apache::lonnet::symbread($requrl);
1003: unless (&Apache::lonnet::symbverify($symb,$requrl)) {
1004: undef($symb);
1005: }
1006: }
1007: }
1008: if ($symb) {
1009: if ($requrl eq '/adm/navmaps') {
1010: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
1011: &Apache::lonnet::symblist($map,$murl => [$murl,$mid]);
1012: } elsif (($requrl =~ m{^/adm/wrapper/}) ||
1013: ($requrl =~ m{^/adm/coursedocs/showdoc/})) {
1014: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
1015: if ($map =~ /\.page$/) {
1016: my $mapsymb = &Apache::lonnet::symbread($map);
1017: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
1018: }
1019: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
1020: 'last_known' =>[$murl,$mid]);
1021: }
1022: }
1023: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
1024: (($requrl=~m|(.*)/smpedit$|) &&
1025: &Apache::lonnet::symbverify($symb,$1)) ||
1026: (($requrl=~m|(.*/aboutme)/portfolio$|) &&
1027: &Apache::lonnet::symbverify($symb,$1))) {
1028: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
1029: if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) {
1030: my $mapsymb = &Apache::lonnet::symbread($map);
1031: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
1032: }
1033: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
1034: 'last_known' =>[$murl,$mid]);
1035: } else {
1036: $r->log_reason('Invalid symb for '.$requrl.': '.
1037: $symb);
1038: $env{'user.error.msg'}=
1039: "$requrl:bre:1:1:Invalid Access";
1040: return HTTP_NOT_ACCEPTABLE;
1041: }
1042: } else {
1043: if ($requrl=~m{^(/adm/.*/aboutme)/portfolio$}) {
1044: $requrl = $1;
1045: }
1046: $symb=&Apache::lonnet::symbread($requrl);
1047: if (&Apache::lonnet::is_on_map($requrl) && $symb) {
1048: my ($encstate,$invalidsymb);
1049: unless (&Apache::lonnet::symbverify($symb,$requrl,\$encstate)) {
1050: $invalidsymb = 1;
1051: #
1052: # If $env{'request.enc'} inconsistent with encryption expected for $symb
1053: # retrieved by lonnet::symbread(), call again to check for an instance of
1054: # $requrl in the course for which expected encryption matches request.enc.
1055: # If symb for different instance passes lonnet::symbverify(), use that as
1056: # the symb for $requrl and call &Apache::lonnet::allowed() for that symb.
1057: # Report invalid symb if there is no other symb. Redirect to /adm/ambiguous
1058: # if multiple possible symbs consistent with request.enc available for $requrl.
1059: #
1060: if (($env{'request.enc'} && !$encstate) || (!$env{'request.enc'} && $encstate)) {
1061: my %possibles;
1062: my $nocache = 1;
1063: my $oldsymb = $symb;
1064: $symb = &Apache::lonnet::symbread($requrl,'','','',\%possibles,$nocache);
1065: if (($symb) && ($symb ne $oldsymb)) {
1066: if (&Apache::lonnet::symbverify($symb,$requrl)) {
1067: my $access=&Apache::lonnet::allowed('bre',$requrl,$symb);
1068: if ($access eq 'B') {
1069: $env{'request.symb'} = $symb;
1070: &Apache::blockedaccess::setup_handler($r);
1071: return OK;
1072: } elsif (($access eq '2') || ($access eq 'F')) {
1073: $invalidsymb = '';
1074: }
1075: }
1076: } elsif (keys(%possibles) > 1) {
1077: $r->internal_redirect('/adm/ambiguous');
1078: return OK;
1079: }
1080: }
1081: if ($invalidsymb) {
1082: if ($requrl eq '/adm/navmaps') {
1083: undef($symb);
1084: } else {
1085: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
1086: $env{'user.error.msg'}=
1087: "$requrl:bre:1:1:Invalid Access";
1088: return HTTP_NOT_ACCEPTABLE;
1089: }
1090: }
1091: }
1092: }
1093: if ($symb) {
1094: my ($map,$mid,$murl)=
1095: &Apache::lonnet::decode_symb($symb);
1096: if ($requrl eq '/adm/navmaps') {
1097: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid]);
1098: } else {
1099: if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) {
1100: my $mapsymb = &Apache::lonnet::symbread($map);
1101: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
1102: }
1103: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
1104: 'last_known' =>[$murl,$mid]);
1105: }
1106: }
1107: }
1108: $env{'request.symb'}=$symb;
1109: if (($env{'request.symbread.cached.'}) && ($env{'request.symbread.cached.'} ne $symb)) {
1110: $env{'request.symbread.cached.'} = $symb;
1111: }
1112: &Apache::lonnet::courseacclog($symb);
1113: } else {
1114: # ------------------------------------------------------- This is other content
1115: &Apache::lonnet::courseacclog($requrl);
1116: }
1117: if ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/(docs|supplemental)/.+\.html?$}) {
1118: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1119: if ($query) {
1120: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit']);
1121: if ($env{'form.forceedit'}) {
1122: $env{'request.state'} = 'edit';
1123: }
1124: }
1125: }
1126: } elsif ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/portfolio/syllabus/.+\.html?$}) {
1127: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1128: if ($query) {
1129: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit','editmode']);
1130: if (($env{'form.forceedit'}) || ($env{'form.editmode'})) {
1131: $env{'request.state'} = 'edit';
1132: }
1133: }
1134: }
1135: }
1136: }
1137: return OK;
1138: } else {
1139: my $defdom=$r->dir_config('lonDefDomain');
1140: ($is_balancer,$otherserver) =
1141: &Apache::lonnet::check_loadbalancing(undef,$defdom);
1142: if ($is_balancer) {
1143: $r->set_handlers('PerlResponseHandler'=>
1144: [\&Apache::switchserver::handler]);
1145: if ($otherserver ne '') {
1146: $env{'form.otherserver'} = $otherserver;
1147: }
1148: }
1149: }
1150: # -------------------------------------------- See if this is a public resource
1151: if ($requrl=~m|^/+adm/+help/+|) {
1152: return OK;
1153: }
1154: # ------------------------------------ See if this is a viewable portfolio file
1155: if (&Apache::lonnet::is_portfolio_url($requrl)) {
1156: my $clientip = &Apache::lonnet::get_requestor_ip($r);
1157: my $access=&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip);
1158: if ($access eq 'A') {
1159: &Apache::restrictedaccess::setup_handler($r);
1160: return OK;
1161: }
1162: if (($access ne '2') && ($access ne 'F')) {
1163: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
1164: return HTTP_NOT_ACCEPTABLE;
1165: }
1166: }
1167:
1168: # -------------------------------------------------------------- Not authorized
1169: $requrl=~/\.(\w+)$/;
1170: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
1171: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
1172: # ($requrl=~m|^/prtspool/|)) {
1173: # -------------------------- Store where they wanted to go and get login screen
1174: $env{'request.querystring'}=$r->args;
1175: $env{'request.firsturl'}=$requrl;
1176: return FORBIDDEN;
1177: # } else {
1178: # --------------------------------------------------------------------- Goodbye
1179: # return HTTP_BAD_REQUEST;
1180: # }
1181: }
1182:
1183: 1;
1184: __END__
1185:
1186: =pod
1187:
1188: =back
1189:
1190: =cut
1191:
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