1: # The LearningOnline Network
2: # Cookie Based Access Handler
3: #
4: # $Id: lonacc.pm,v 1.159.2.8.2.7 2020/10/26 01:19:53 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 Fcntl qw(:flock);
106: use LONCAPA qw(:DEFAULT :match);
107:
108: sub cleanup {
109: my ($r)=@_;
110: if (! $r->is_initial_req()) { return DECLINED; }
111: &Apache::lonnet::save_cache();
112: return OK;
113: }
114:
115: sub goodbye {
116: my ($r)=@_;
117: &Apache::lonnet::goodbye();
118: return DONE;
119: }
120:
121: ###############################################
122:
123: sub get_posted_cgi {
124: my ($r,$fields) = @_;
125:
126: my $buffer;
127: if ($r->header_in('Content-length')) {
128: $r->read($buffer,$r->header_in('Content-length'),0);
129: }
130: my $content_type = $r->header_in('Content-type');
131: if ($content_type !~ m{^multipart/form-data}) {
132: my @pairs=split(/&/,$buffer);
133: my $pair;
134: foreach $pair (@pairs) {
135: my ($name,$value) = split(/=/,$pair);
136: $value =~ tr/+/ /;
137: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
138: $name =~ tr/+/ /;
139: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
140: if (ref($fields) eq 'ARRAY') {
141: next if (!grep(/^\Q$name\E$/,@{$fields}));
142: }
143: &Apache::loncommon::add_to_env("form.$name",$value);
144: }
145: } else {
146: my ($contentsep) = ($content_type =~ /boundary=\"?([^\";,]+)\"?/);
147: my @lines = split (/\n/,$buffer);
148: my $name='';
149: my $value='';
150: my $fname='';
151: my $fmime='';
152: my $i;
153: for ($i=0;$i<=$#lines;$i++) {
154: if ($lines[$i]=~/^--\Q$contentsep\E/) {
155: if ($name) {
156: chomp($value);
157: if (($r->uri eq '/adm/portfolio') &&
158: ($name eq 'uploaddoc')) {
159: if (length($value) == 1) {
160: $value=~s/[\r\n]$//;
161: }
162: } elsif ($fname =~ /\.(xls|doc|ppt)(x|m)$/i) {
163: $value=~s/[\r\n]$//;
164: }
165: if (ref($fields) eq 'ARRAY') {
166: next if (!grep(/^\Q$name\E$/,@{$fields}));
167: }
168: if ($fname) {
169: if ($env{'form.symb'} ne '') {
170: my $size = (length($value))/(1024.0 * 1024.0);
171: if (&upload_size_allowed($name,$size,$fname) eq 'ok') {
172: $env{"form.$name.filename"}=$fname;
173: $env{"form.$name.mimetype"}=$fmime;
174: &Apache::loncommon::add_to_env("form.$name",$value);
175: }
176: } else {
177: $env{"form.$name.filename"}=$fname;
178: $env{"form.$name.mimetype"}=$fmime;
179: &Apache::loncommon::add_to_env("form.$name",$value);
180: }
181: } else {
182: $value=~s/\s+$//s;
183: &Apache::loncommon::add_to_env("form.$name",$value);
184: }
185: }
186: if ($i<$#lines) {
187: $i++;
188: $lines[$i]=~
189: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
190: $name=$1;
191: $value='';
192: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
193: $fname=$1;
194: if
195: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
196: $fmime=$1;
197: $i++;
198: } else {
199: $fmime='';
200: }
201: } else {
202: $fname='';
203: $fmime='';
204: }
205: $i++;
206: }
207: } else {
208: $value.=$lines[$i]."\n";
209: }
210: }
211: }
212: #
213: # Digested POSTed values
214: #
215: # Remember the way this was originally done (GET or POST)
216: #
217: $env{'request.method'}=$ENV{'REQUEST_METHOD'};
218: #
219: # There may also be stuff in the query string
220: # Tell subsequent handlers that this was GET, not POST, so they can access query string.
221: # Also, unset POSTed content length to cover all tracks.
222: #
223:
224: $r->method_number(M_GET);
225:
226: $r->method('GET');
227: $r->headers_in->unset('Content-length');
228: }
229:
230: =pod
231:
232: =over
233:
234: =item upload_size_allowed()
235:
236: Perform size checks for file uploads to essayresponse items in course context.
237:
238: Add form.HWFILESIZE.$part_$id to %env with file size (MB)
239: If file exceeds maximum allowed size, add form.HWFILETOOBIG.$part_$id to %env.
240:
241: =cut
242:
243: sub upload_size_allowed {
244: my ($name,$size,$fname) = @_;
245: if ($name =~ /^HWFILE(\w+)$/) {
246: my $ident = $1;
247: my $item = 'HWFILESIZE'.$ident;
248: my $savesize = sprintf("%.6f",$size);
249: &Apache::loncommon::add_to_env("form.$item",$savesize);
250: my $maxsize= &Apache::lonnet::EXT("resource.$ident.maxfilesize");
251: if (!$maxsize) {
252: $maxsize = 10.0; # FIXME This should become a domain configuration.
253: }
254: if ($size > $maxsize) {
255: my $warn = 'HWFILETOOBIG'.$ident;
256: &Apache::loncommon::add_to_env("form.$warn",$fname);
257: return;
258: }
259: }
260: return 'ok';
261: }
262:
263: =pod
264:
265: =item sso_login()
266:
267: handle the case of the single sign on user, at this point $r->user
268: will be set and valid; now need to find the loncapa user info, and possibly
269: balance them. If $r->user() is set this means either it was either set by
270: SSO or by checkauthen.pm, if a valid cookie was found. The latter case can
271: be identified by the third arg ($usename), except when lonacc is called in
272: an internal redirect to /adm/switchserver (e.g., load-balancing following
273: successful authentication) -- no cookie set yet. For that particular case
274: simply skip the call to sso_login().
275:
276: returns OK if it was SSO and user was handled.
277: returns undef if not SSO or no means to handle the user.
278:
279: =cut
280:
281: sub sso_login {
282: my ($r,$handle,$username) = @_;
283:
284: if (($r->user eq '') || ($username ne '') || ($r->user eq 'public:public') ||
285: (defined($env{'user.name'}) && (defined($env{'user.domain'}))
286: && ($handle ne ''))) {
287: # not an SSO case or already logged in
288: return undef;
289: }
290:
291: my ($user) = ($r->user =~ m/^($match_username)$/);
292: if ($user eq '') {
293: return undef;
294: }
295:
296: my $query = $r->args;
297: my %form;
298: if ($query) {
299: my @items = ('role','symb','iptoken');
300: &Apache::loncommon::get_unprocessed_cgi($query,\@items);
301: foreach my $item (@items) {
302: if (defined($env{'form.'.$item})) {
303: $form{$item} = $env{'form.'.$item};
304: }
305: }
306: }
307:
308: my %sessiondata;
309: if ($form{'iptoken'}) {
310: %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
311: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
312: unless ($sessiondata{'sessionserver'}) {
313: delete($form{'iptoken'});
314: }
315: }
316:
317: my $domain = $r->dir_config('lonSSOUserDomain');
318: if ($domain eq '') {
319: $domain = $r->dir_config('lonDefDomain');
320: }
321: my $home=&Apache::lonnet::homeserver($user,$domain);
322: if ($home !~ /(con_lost|no_host|no_such_host)/) {
323: &Apache::lonnet::logthis(" SSO authorized user $user ");
324: my ($is_balancer,$otherserver,$hosthere);
325: if ($form{'iptoken'}) {
326: if (($sessiondata{'domain'} eq $domain) &&
327: ($sessiondata{'username'} eq $user)) {
328: $hosthere = 1;
329: }
330: }
331: unless ($hosthere) {
332: ($is_balancer,$otherserver) =
333: &Apache::lonnet::check_loadbalancing($user,$domain,'login');
334: if ($is_balancer) {
335: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
336: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
337: if (($found_server) && ($balancer_cookie =~ /^\Q$domain\E_\Q$user\E_/)) {
338: $otherserver = $found_server;
339: } elsif ($otherserver eq '') {
340: my $lowest_load;
341: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($domain);
342: if ($lowest_load > 100) {
343: $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$domain);
344: }
345: if ($otherserver ne '') {
346: my @hosts = &Apache::lonnet::current_machine_ids();
347: if (grep(/^\Q$otherserver\E$/,@hosts)) {
348: $hosthere = $otherserver;
349: }
350: }
351: }
352: }
353: }
354: if (($is_balancer) && (!$hosthere)) {
355: # login but immediately go to switch server to find us a new
356: # machine
357: &Apache::lonauth::success($r,$user,$domain,$home,'noredirect');
358: foreach my $item (keys(%form)) {
359: $env{'form.'.$item} = $form{$item};
360: }
361: unless ($form{'symb'}) {
362: unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
363: $env{'form.origurl'} = $r->uri;
364: }
365: }
366: $env{'request.sso.login'} = 1;
367: if (defined($r->dir_config("lonSSOReloginServer"))) {
368: $env{'request.sso.reloginserver'} =
369: $r->dir_config('lonSSOReloginServer');
370: }
371: my $redirecturl = '/adm/switchserver';
372: if ($otherserver ne '') {
373: $redirecturl .= '?otherserver='.$otherserver;
374: }
375: $r->internal_redirect($redirecturl);
376: $r->set_handlers('PerlHandler'=> undef);
377: } else {
378: # need to login them in, so generate the need data that
379: # migrate expects to do login
380: my $ip = $r->get_remote_host();
381: my %info=('ip' => $ip,
382: 'domain' => $domain,
383: 'username' => $user,
384: 'server' => $r->dir_config('lonHostID'),
385: 'sso.login' => 1
386: );
387: foreach my $item ('role','symb','iptoken') {
388: if (exists($form{$item})) {
389: $info{$item} = $form{$item};
390: }
391: }
392: unless ($info{'symb'}) {
393: unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
394: $info{'origurl'} = $r->uri;
395: }
396: }
397: if ($r->dir_config("ssodirecturl") == 1) {
398: $info{'origurl'} = $r->uri;
399: }
400: if (defined($r->dir_config("lonSSOReloginServer"))) {
401: $info{'sso.reloginserver'} =
402: $r->dir_config('lonSSOReloginServer');
403: }
404: if (($is_balancer) && ($hosthere)) {
405: $info{'noloadbalance'} = $hosthere;
406: }
407: my $token =
408: &Apache::lonnet::tmpput(\%info,
409: $r->dir_config('lonHostID'));
410: $env{'form.token'} = $token;
411: $r->internal_redirect('/adm/migrateuser');
412: $r->set_handlers('PerlHandler'=> undef);
413: }
414: return OK;
415: } else {
416: &Apache::lonnet::logthis(" SSO authorized unknown user $user ");
417: my @cancreate;
418: my %domconfig =
419: &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
420: if (ref($domconfig{'usercreation'}) eq 'HASH') {
421: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
422: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
423: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
424: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
425: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
426: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
427: }
428: }
429: }
430: if ((grep(/^sso$/,@cancreate)) || (defined($r->dir_config('lonSSOUserUnknownRedirect')))) {
431: $r->subprocess_env->set('SSOUserUnknown' => $user);
432: $r->subprocess_env->set('SSOUserDomain' => $domain);
433: if (grep(/^sso$/,@cancreate)) {
434: $r->set_handlers('PerlHandler'=> [\&Apache::createaccount::handler]);
435: $r->handler('perl-script');
436: } else {
437: $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
438: $r->set_handlers('PerlHandler'=> undef);
439: }
440: return OK;
441: }
442: }
443: return undef;
444: }
445:
446: sub handler {
447: my $r = shift;
448: my $requrl=$r->uri;
449:
450: if ($requrl =~ m{^/res/adm/pages/[^/]+\.(gif|png)$}) {
451: return OK;
452: }
453:
454: if (&Apache::lonnet::is_domainimage($requrl)) {
455: return OK;
456: }
457:
458: my %user;
459: my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);
460:
461: unless (($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) {
462: my $result = &sso_login($r,$handle,$user{'name'});
463: if (defined($result)) {
464: return $result;
465: }
466: }
467:
468: my ($is_balancer,$otherserver);
469:
470: if ($handle eq '') {
471: unless ((($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) ||
472: ($requrl =~ m{^/public/$match_domain/$match_courseid/syllabus}) ||
473: ($requrl =~ m{^/adm/help/}) ||
474: ($requrl =~ m{^/res/$match_domain/$match_username/})) {
475: $r->log_reason("Cookie not valid", $r->filename);
476: }
477: } elsif ($handle ne '') {
478:
479: # ------------------------------------------------------ Initialize Environment
480: my $lonidsdir=$r->dir_config('lonIDsDir');
481: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
482:
483: # --------------------------------------------------------- Initialize Language
484:
485: &Apache::lonlocal::get_language_handle($r);
486:
487: }
488:
489: # -------------------------------------------------- Should be a valid user now
490: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
491: # -------------------------------------------------------------- Resource State
492:
493: my ($cdom,$cnum);
494: if ($env{'request.course.id'}) {
495: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
496: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
497: }
498: if ($requrl=~/^\/+(res|uploaded)\//) {
499: $env{'request.state'} = "published";
500: } else {
501: $env{'request.state'} = 'unknown';
502: }
503: $env{'request.filename'} = $r->filename;
504: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
505: my ($suppext,$checkabsolute);
506: if ($requrl =~ m{^/adm/wrapper/ext/}) {
507: my $query = $r->args;
508: if ($query) {
509: my $preserved;
510: foreach my $pair (split(/&/,$query)) {
511: my ($name, $value) = split(/=/,$pair);
512: unless (($name eq 'symb') || ($name eq 'usehttp')) {
513: $preserved .= $pair.'&';
514: }
515: if (($env{'request.course.id'}) && ($name eq 'folderpath')) {
516: if ($value =~ /^supplemental/) {
517: $suppext = 1;
518: }
519: }
520: }
521: $preserved =~ s/\&$//;
522: if ($preserved) {
523: $env{'request.external.querystring'} = $preserved;
524: }
525: }
526: if ($env{'request.course.id'}) {
527: $checkabsolute = 1;
528: }
529: } elsif ($env{'request.course.id'} &&
530: (($requrl =~ m{^/adm/$match_domain/$match_username/aboutme$}) ||
531: ($requrl =~ m{^/public/$cdom/$cnum/syllabus$}))) {
532: my $query = $r->args;
533: if ($query) {
534: foreach my $pair (split(/&/,$query)) {
535: my ($name, $value) = split(/=/,$pair);
536: if ($name eq 'folderpath') {
537: if ($value =~ /^supplemental/) {
538: $suppext = 1;
539: }
540: last;
541: }
542: }
543: }
544: if ($requrl =~ m{^/public/$cdom/$cnum/syllabus$}) {
545: $checkabsolute = 1;
546: }
547: }
548: if ($checkabsolute) {
549: my $hostname = $r->hostname();
550: my $lonhost = &Apache::lonnet::host_from_dns($hostname);
551: if ($lonhost) {
552: my $actual = &Apache::lonnet::absolute_url($hostname);
553: my $exphostname = &Apache::lonnet::hostname($lonhost);
554: my $expected = $Apache::lonnet::protocol{$lonhost}.'://'.$hostname;
555: unless ($actual eq $expected) {
556: $env{'request.use_absolute'} = $expected;
557: }
558: }
559: }
560: # -------------------------------------------------------- Load POST parameters
561:
562: &Apache::lonacc::get_posted_cgi($r);
563:
564: # ------------------------------------------------------ Check if load balancer
565:
566: my $checkexempt;
567: if ($env{'user.loadbalexempt'} eq $r->dir_config('lonHostID')) {
568: if ($env{'user.loadbalcheck.time'} + 600 > time) {
569: $checkexempt = 1;
570: }
571: }
572: if ($env{'user.noloadbalance'} eq $r->dir_config('lonHostID')) {
573: $checkexempt = 1;
574: }
575: unless (($checkexempt) || (($requrl eq '/adm/switchserver') && (!$r->is_initial_req()))) {
576: ($is_balancer,$otherserver) =
577: &Apache::lonnet::check_loadbalancing($env{'user.name'},
578: $env{'user.domain'});
579: if ($is_balancer) {
580: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
581: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
582: if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
583: $otherserver = $found_server;
584: }
585: unless ($requrl eq '/adm/switchserver') {
586: $r->set_handlers('PerlResponseHandler'=>
587: [\&Apache::switchserver::handler]);
588: }
589: if ($otherserver ne '') {
590: $env{'form.otherserver'} = $otherserver;
591: }
592: unless (($env{'form.origurl'}) || ($r->uri eq '/adm/roles') ||
593: ($r->uri eq '/adm/switchserver') || ($r->uri eq '/adm/sso')) {
594: $env{'form.origurl'} = $r->uri;
595: }
596: }
597: }
598: if ($requrl=~m{^/+tiny/+$match_domain/+\w+$}) {
599: if ($env{'user.name'} eq 'public' &&
600: $env{'user.domain'} eq 'public') {
601: $env{'request.firsturl'}=$requrl;
602: return FORBIDDEN;
603: } else {
604: return OK;
605: }
606: }
607:
608: # ---------------------------------------------------------------- Check access
609: my $now = time;
610: my $check_symb;
611: if ($requrl !~ m{^/(?:adm|public|(?:prt|zip)spool)/}
612: || $requrl =~ /^\/adm\/.*\/(smppg|bulletinboard)(\?|$ )/x) {
613: my ($access,$poss_symb);
614: if (($env{'request.course.id'}) && (!$suppext)) {
615: $requrl=~/\.(\w+)$/;
616: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
617: ($requrl=~/^\/adm\/.*\/(aboutme|smppg|bulletinboard)(\?|$ )/x) ||
618: ($requrl=~/^\/adm\/wrapper\//) ||
619: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
620: ($requrl=~m|\.problem/smpedit$|) ||
621: ($requrl=~/^\/public\/.*\/syllabus$/) ||
622: ($requrl=~/^\/adm\/(viewclasslist|navmaps)$/) ||
623: ($requrl=~/^\/adm\/.*\/aboutme\/portfolio(\?|$)/) ||
624: ($requrl=~m{^/adm/$cdom/$cnum/\d+/ext\.tool$})) {
625: $check_symb = 1;
626: }
627: }
628: if ($check_symb) {
629: if ($env{'form.symb'}) {
630: $poss_symb=&Apache::lonnet::symbclean($env{'form.symb'});
631: } elsif (($env{'request.course.id'}) && ($r->args ne '')) {
632: my $query = $r->args;
633: foreach my $pair (split(/&/,$query)) {
634: my ($name, $value) = split(/=/,$pair);
635: $name = &unescape($name);
636: $value =~ tr/+/ /;
637: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
638: if ($name eq 'symb') {
639: $poss_symb = &Apache::lonnet::symbclean($value);
640: last;
641: }
642: }
643: }
644: if ($poss_symb) {
645: my ($possmap,$resid,$url)=&Apache::lonnet::decode_symb($poss_symb);
646: $url = &Apache::lonnet::clutter($url);
647: unless (($url eq $requrl) && (&Apache::lonnet::is_on_map($possmap))) {
648: undef($poss_symb);
649: }
650: if ($poss_symb) {
651: if ((!$env{'request.role.adv'}) && ($env{'acc.randomout'}) &&
652: ($env{'acc.randomout'}=~/\&\Q$poss_symb\E\&/)) {
653: undef($poss_symb);
654: }
655: }
656: }
657: if ($poss_symb) {
658: $access=&Apache::lonnet::allowed('bre',$requrl,$poss_symb);
659: } else {
660: $access=&Apache::lonnet::allowed('bre',$requrl,'','','','',1);
661: }
662: } else {
663: $access=&Apache::lonnet::allowed('bre',$requrl);
664: }
665: if ($handle eq '') {
666: unless ($access eq 'F') {
667: if ($requrl =~ m{^/res/$match_domain/$match_username/}) {
668: $r->log_reason("Cookie not valid", $r->filename);
669: }
670: }
671: }
672: if ($access eq '1') {
673: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
674: return HTTP_NOT_ACCEPTABLE;
675: }
676: if ($access eq 'A') {
677: &Apache::restrictedaccess::setup_handler($r);
678: return OK;
679: }
680: if ($access eq 'B') {
681: if ($poss_symb) {
682: if ($requrl=~m{^(/adm/.*/aboutme)/portfolio$}) {
683: $requrl = $1;
684: }
685: if (&Apache::lonnet::symbverify($poss_symb,$requrl)) {
686: $env{'request.symb'} = $poss_symb;
687: }
688: }
689: &Apache::blockedaccess::setup_handler($r);
690: return OK;
691: }
692: if (($access ne '2') && ($access ne 'F')) {
693: if ($requrl =~ m{^/res/}) {
694: $access = &Apache::lonnet::allowed('bro',$requrl);
695: if ($access ne 'F') {
696: if ($requrl eq '/res/lib/templates/simpleproblem.problem/smpedit') {
697: $access = &Apache::lonnet::allowed('bre','/res/lib/templates/simpleproblem.problem');
698: if ($access ne 'F') {
699: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
700: return HTTP_NOT_ACCEPTABLE;
701: }
702: } else {
703: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
704: return HTTP_NOT_ACCEPTABLE;
705: }
706: }
707: } elsif (($handle =~ /^publicuser_\d+$/) && (&Apache::lonnet::is_portfolio_url($requrl))) {
708: my $clientip = $r->get_remote_host();
709: if (&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip) ne 'F') {
710: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
711: return HTTP_NOT_ACCEPTABLE;
712: }
713: } else {
714: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
715: return HTTP_NOT_ACCEPTABLE;
716: }
717: }
718: }
719: if ($requrl =~ m|^/prtspool/|) {
720: my $start='/prtspool/'.$env{'user.name'}.'_'.
721: $env{'user.domain'};
722: if ($requrl !~ /^\Q$start\E/) {
723: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
724: return HTTP_NOT_ACCEPTABLE;
725: }
726: }
727: if ($requrl =~ m|^/zipspool/|) {
728: my $start='/zipspool/zipout/'.$env{'user.name'}.":".
729: $env{'user.domain'};
730: if ($requrl !~ /^\Q$start\E/) {
731: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
732: return HTTP_NOT_ACCEPTABLE;
733: }
734: }
735: if ($env{'user.name'} eq 'public' &&
736: $env{'user.domain'} eq 'public' &&
737: $requrl !~ m{^/+(res|public|uploaded)/} &&
738: $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
739: $requrl !~ m{^/adm/blockingstatus/.*$} &&
740: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
741: $env{'request.querystring'}=$r->args;
742: $env{'request.firsturl'}=$requrl;
743: return FORBIDDEN;
744: }
745: # ------------------------------------------------------------- This is allowed
746: if ($env{'request.course.id'}) {
747: &Apache::lonnet::countacc($requrl);
748: my $query=$r->args;
749: if ($check_symb) {
750: # ------------------------------------- This is serious stuff, get symb and log
751: my $symb;
752: if ($query) {
753: &Apache::loncommon::get_unprocessed_cgi($query,['symb','folderpath']);
754: }
755: if ($env{'form.symb'}) {
756: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
757: if ($requrl eq '/adm/navmaps') {
758: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
759: &Apache::lonnet::symblist($map,$murl => [$murl,$mid]);
760: } elsif ($requrl =~ m|^/adm/wrapper/|
761: || $requrl =~ m|^/adm/coursedocs/showdoc/|) {
762: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
763: if ($map =~ /\.page$/) {
764: my $mapsymb = &Apache::lonnet::symbread($map);
765: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
766: }
767: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
768: 'last_known' =>[$murl,$mid]);
769: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
770: (($requrl=~m|(.*)/smpedit$|) &&
771: &Apache::lonnet::symbverify($symb,$1)) ||
772: (($requrl=~m|(.*/aboutme)/portfolio$|) &&
773: &Apache::lonnet::symbverify($symb,$1))) {
774: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
775: if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) {
776: my $mapsymb = &Apache::lonnet::symbread($map);
777: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
778: }
779: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
780: 'last_known' =>[$murl,$mid]);
781: } else {
782: $r->log_reason('Invalid symb for '.$requrl.': '.
783: $symb);
784: $env{'user.error.msg'}=
785: "$requrl:bre:1:1:Invalid Access";
786: return HTTP_NOT_ACCEPTABLE;
787: }
788: } else {
789: if ($requrl=~m{^(/adm/.*/aboutme)/portfolio$}) {
790: $requrl = $1;
791: }
792: $symb=&Apache::lonnet::symbread($requrl);
793: if (&Apache::lonnet::is_on_map($requrl) && $symb) {
794: my ($encstate,$invalidsymb);
795: unless (&Apache::lonnet::symbverify($symb,$requrl,\$encstate)) {
796: $invalidsymb = 1;
797: #
798: # If $env{'request.enc'} inconsistent with encryption expected for $symb
799: # retrieved by lonnet::symbread(), call again to check for an instance of
800: # $requrl in the course for which expected encryption matches request.enc.
801: # If symb for different instance passes lonnet::symbverify(), use that as
802: # the symb for $requrl and call &Apache::lonnet::allowed() for that symb.
803: # Report invalid symb if there is no other symb. Redirect to /adm/ambiguous
804: # if multiple possible symbs consistent with request.enc available for $requrl.
805: #
806: if (($env{'request.enc'} && !$encstate) || (!$env{'request.enc'} && $encstate)) {
807: my %possibles;
808: my $nocache = 1;
809: my $oldsymb = $symb;
810: $symb = &Apache::lonnet::symbread($requrl,'','','',\%possibles,$nocache);
811: if (($symb) && ($symb ne $oldsymb)) {
812: if (&Apache::lonnet::symbverify($symb,$requrl)) {
813: my $access=&Apache::lonnet::allowed('bre',$requrl,$symb);
814: if ($access eq 'B') {
815: $env{'request.symb'} = $symb;
816: &Apache::blockedaccess::setup_handler($r);
817: return OK;
818: } elsif (($access eq '2') || ($access eq 'F')) {
819: $invalidsymb = '';
820: }
821: }
822: } elsif (keys(%possibles) > 1) {
823: $r->internal_redirect('/adm/ambiguous');
824: return OK;
825: }
826: }
827: if ($invalidsymb) {
828: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
829: $env{'user.error.msg'}=
830: "$requrl:bre:1:1:Invalid Access";
831: return HTTP_NOT_ACCEPTABLE;
832: }
833: }
834: }
835: if ($symb) {
836: my ($map,$mid,$murl)=
837: &Apache::lonnet::decode_symb($symb);
838: if ($requrl eq '/adm/navmaps') {
839: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid]);
840: } else {
841: if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) {
842: my $mapsymb = &Apache::lonnet::symbread($map);
843: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
844: }
845: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
846: 'last_known' =>[$murl,$mid]);
847: }
848: }
849: }
850: $env{'request.symb'}=$symb;
851: if (($env{'request.symbread.cached.'}) && ($env{'request.symbread.cached.'} ne $symb)) {
852: $env{'request.symbread.cached.'} = $symb;
853: }
854: &Apache::lonnet::courseacclog($symb);
855: } else {
856: # ------------------------------------------------------- This is other content
857: &Apache::lonnet::courseacclog($requrl);
858: }
859: if ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/(docs|supplemental)/.+\.html?$}) {
860: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
861: if ($query) {
862: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit']);
863: if ($env{'form.forceedit'}) {
864: $env{'request.state'} = 'edit';
865: }
866: }
867: }
868: } elsif ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/portfolio/syllabus/.+\.html?$}) {
869: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
870: if ($query) {
871: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit','editmode']);
872: if (($env{'form.forceedit'}) || ($env{'form.editmode'})) {
873: $env{'request.state'} = 'edit';
874: }
875: }
876: }
877: }
878: }
879: return OK;
880: } else {
881: my $defdom=$r->dir_config('lonDefDomain');
882: ($is_balancer,$otherserver) =
883: &Apache::lonnet::check_loadbalancing(undef,$defdom);
884: if ($is_balancer) {
885: $r->set_handlers('PerlResponseHandler'=>
886: [\&Apache::switchserver::handler]);
887: if ($otherserver ne '') {
888: $env{'form.otherserver'} = $otherserver;
889: }
890: }
891: }
892: # -------------------------------------------- See if this is a public resource
893: if ($requrl=~m|^/+adm/+help/+|) {
894: return OK;
895: }
896: # ------------------------------------ See if this is a viewable portfolio file
897: if (&Apache::lonnet::is_portfolio_url($requrl)) {
898: my $clientip = $r->get_remote_host();
899: my $access=&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip);
900: if ($access eq 'A') {
901: &Apache::restrictedaccess::setup_handler($r);
902: return OK;
903: }
904: if (($access ne '2') && ($access ne 'F')) {
905: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
906: return HTTP_NOT_ACCEPTABLE;
907: }
908: }
909:
910: # -------------------------------------------------------------- Not authorized
911: $requrl=~/\.(\w+)$/;
912: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
913: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
914: # ($requrl=~m|^/prtspool/|)) {
915: # -------------------------- Store where they wanted to go and get login screen
916: $env{'request.querystring'}=$r->args;
917: $env{'request.firsturl'}=$requrl;
918: return FORBIDDEN;
919: # } else {
920: # --------------------------------------------------------------------- Goodbye
921: # return HTTP_BAD_REQUEST;
922: # }
923: }
924:
925: 1;
926: __END__
927:
928: =pod
929:
930: =back
931:
932: =cut
933:
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