1: # The LearningOnline Network
2: # Cookie Based Access Handler
3: #
4: # $Id: lonacc.pm,v 1.179 2020/09/28 00:10:27 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: } elsif ($fname =~ /\.(xls|doc|ppt)(x|m)$/i) {
164: $value=~s/[\r\n]$//;
165: }
166: if (ref($fields) eq 'ARRAY') {
167: next if (!grep(/^\Q$name\E$/,@{$fields}));
168: }
169: if ($fname) {
170: if ($env{'form.symb'} ne '') {
171: my $size = (length($value))/(1024.0 * 1024.0);
172: if (&upload_size_allowed($name,$size,$fname) eq 'ok') {
173: $env{"form.$name.filename"}=$fname;
174: $env{"form.$name.mimetype"}=$fmime;
175: &Apache::loncommon::add_to_env("form.$name",$value);
176: }
177: } else {
178: $env{"form.$name.filename"}=$fname;
179: $env{"form.$name.mimetype"}=$fmime;
180: &Apache::loncommon::add_to_env("form.$name",$value);
181: }
182: } else {
183: $value=~s/\s+$//s;
184: &Apache::loncommon::add_to_env("form.$name",$value);
185: }
186: }
187: if ($i<$#lines) {
188: $i++;
189: $lines[$i]=~
190: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
191: $name=$1;
192: $value='';
193: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
194: $fname=$1;
195: if
196: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
197: $fmime=$1;
198: $i++;
199: } else {
200: $fmime='';
201: }
202: } else {
203: $fname='';
204: $fmime='';
205: }
206: if ($i<$#lines && $lines[$i+1]=~/^Content\-Type\:\s*([\w\-\/]+)/i) {
207: # TODO: something with $1 !
208: $i++;
209: }
210: if ($i<$#lines && $lines[$i+1]=~/^Content\-transfer\-encoding\:\s*([\w\-\/]+)/i) {
211: # TODO: something with $1 !
212: $i++;
213: }
214: $i++;
215: }
216: } else {
217: $value.=$lines[$i]."\n";
218: }
219: }
220: }
221: #
222: # Digested POSTed values
223: #
224: # Remember the way this was originally done (GET or POST)
225: #
226: $env{'request.method'}=$ENV{'REQUEST_METHOD'};
227: #
228: # There may also be stuff in the query string
229: # Tell subsequent handlers that this was GET, not POST, so they can access query string.
230: # Also, unset POSTed content length to cover all tracks.
231: #
232:
233: $r->method_number(M_GET);
234:
235: $r->method('GET');
236: $r->headers_in->unset('Content-length');
237: }
238:
239: =pod
240:
241: =over
242:
243: =item upload_size_allowed()
244:
245: Perform size checks for file uploads to essayresponse items in course context.
246:
247: Add form.HWFILESIZE.$part_$id to %env with file size (MB)
248: If file exceeds maximum allowed size, add form.HWFILETOOBIG.$part_$id to %env.
249:
250: =cut
251:
252: sub upload_size_allowed {
253: my ($name,$size,$fname) = @_;
254: if ($name =~ /^HWFILE(\w+)$/) {
255: my $ident = $1;
256: my $item = 'HWFILESIZE'.$ident;
257: my $savesize = sprintf("%.6f",$size);
258: &Apache::loncommon::add_to_env("form.$item",$savesize);
259: my $maxsize= &Apache::lonnet::EXT("resource.$ident.maxfilesize");
260: if (!$maxsize) {
261: $maxsize = 10.0; # FIXME This should become a domain configuration.
262: }
263: if ($size > $maxsize) {
264: my $warn = 'HWFILETOOBIG'.$ident;
265: &Apache::loncommon::add_to_env("form.$warn",$fname);
266: return;
267: }
268: }
269: return 'ok';
270: }
271:
272: =pod
273:
274: =item sso_login()
275:
276: handle the case of the single sign on user, at this point $r->user
277: will be set and valid; now need to find the loncapa user info, and possibly
278: balance them. If $r->user() is set this means either it was either set by
279: SSO or by checkauthen.pm, if a valid cookie was found. The latter case can
280: be identified by the third arg ($usename), except when lonacc is called in
281: an internal redirect to /adm/switchserver (e.g., load-balancing following
282: successful authentication) -- no cookie set yet. For that particular case
283: simply skip the call to sso_login().
284:
285: returns OK if it was SSO and user was handled.
286: returns undef if not SSO or no means to handle the user.
287:
288: =cut
289:
290: sub sso_login {
291: my ($r,$handle,$username) = @_;
292:
293: if (($r->user eq '') || ($username ne '') || ($r->user eq 'public:public') ||
294: (defined($env{'user.name'}) && (defined($env{'user.domain'}))
295: && ($handle ne ''))) {
296: # not an SSO case or already logged in
297: return undef;
298: }
299:
300: my ($user) = ($r->user =~ m/^($match_username)$/);
301: if ($user eq '') {
302: return undef;
303: }
304:
305: my $query = $r->args;
306: my %form;
307: if ($query) {
308: my @items = ('role','symb','iptoken');
309: &Apache::loncommon::get_unprocessed_cgi($query,\@items);
310: foreach my $item (@items) {
311: if (defined($env{'form.'.$item})) {
312: $form{$item} = $env{'form.'.$item};
313: }
314: }
315: }
316:
317: my %sessiondata;
318: if ($form{'iptoken'}) {
319: %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
320: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
321: unless ($sessiondata{'sessionserver'}) {
322: delete($form{'iptoken'});
323: }
324: }
325:
326: my $domain = $r->dir_config('lonSSOUserDomain');
327: if ($domain eq '') {
328: $domain = $r->dir_config('lonDefDomain');
329: }
330: my $home=&Apache::lonnet::homeserver($user,$domain);
331: if ($home !~ /(con_lost|no_host|no_such_host)/) {
332: &Apache::lonnet::logthis(" SSO authorized user $user ");
333: my ($is_balancer,$otherserver,$hosthere);
334: if ($form{'iptoken'}) {
335: if (($sessiondata{'domain'} eq $domain) &&
336: ($sessiondata{'username'} eq $user)) {
337: $hosthere = 1;
338: }
339: }
340: unless ($hosthere) {
341: ($is_balancer,$otherserver) =
342: &Apache::lonnet::check_loadbalancing($user,$domain,'login');
343: if ($is_balancer) {
344: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
345: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
346: if (($found_server) && ($balancer_cookie =~ /^\Q$domain\E_\Q$user\E_/)) {
347: $otherserver = $found_server;
348: } elsif ($otherserver eq '') {
349: my $lowest_load;
350: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($domain);
351: if ($lowest_load > 100) {
352: $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$domain);
353: }
354: if ($otherserver ne '') {
355: my @hosts = &Apache::lonnet::current_machine_ids();
356: if (grep(/^\Q$otherserver\E$/,@hosts)) {
357: $hosthere = $otherserver;
358: }
359: }
360: }
361: }
362: }
363: if (($is_balancer) && (!$hosthere)) {
364: # login but immediately go to switch server to find us a new
365: # machine
366: &Apache::lonauth::success($r,$user,$domain,$home,'noredirect');
367: foreach my $item (keys(%form)) {
368: $env{'form.'.$item} = $form{$item};
369: }
370: unless ($form{'symb'}) {
371: unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
372: $env{'form.origurl'} = $r->uri;
373: }
374: }
375: $env{'request.sso.login'} = 1;
376: if (defined($r->dir_config("lonSSOReloginServer"))) {
377: $env{'request.sso.reloginserver'} =
378: $r->dir_config('lonSSOReloginServer');
379: }
380: my $redirecturl = '/adm/switchserver';
381: if ($otherserver ne '') {
382: $redirecturl .= '?otherserver='.$otherserver;
383: }
384: $r->internal_redirect($redirecturl);
385: $r->set_handlers('PerlHandler'=> undef);
386: } else {
387: # need to login them in, so generate the need data that
388: # migrate expects to do login
389: my $ip = $r->get_remote_host();
390: my %info=('ip' => $ip,
391: 'domain' => $domain,
392: 'username' => $user,
393: 'server' => $r->dir_config('lonHostID'),
394: 'sso.login' => 1
395: );
396: foreach my $item ('role','symb','iptoken') {
397: if (exists($form{$item})) {
398: $info{$item} = $form{$item};
399: }
400: }
401: unless ($info{'symb'}) {
402: unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
403: $info{'origurl'} = $r->uri;
404: }
405: }
406: if ($r->dir_config("ssodirecturl") == 1) {
407: $info{'origurl'} = $r->uri;
408: }
409: if (defined($r->dir_config("lonSSOReloginServer"))) {
410: $info{'sso.reloginserver'} =
411: $r->dir_config('lonSSOReloginServer');
412: }
413: if (($is_balancer) && ($hosthere)) {
414: $info{'noloadbalance'} = $hosthere;
415: }
416: my $token =
417: &Apache::lonnet::tmpput(\%info,
418: $r->dir_config('lonHostID'));
419: $env{'form.token'} = $token;
420: $r->internal_redirect('/adm/migrateuser');
421: $r->set_handlers('PerlHandler'=> undef);
422: }
423: return OK;
424: } else {
425: &Apache::lonnet::logthis(" SSO authorized unknown user $user ");
426: my @cancreate;
427: my %domconfig =
428: &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
429: if (ref($domconfig{'usercreation'}) eq 'HASH') {
430: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
431: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
432: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
433: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
434: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
435: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
436: }
437: }
438: }
439: if ((grep(/^sso$/,@cancreate)) || (defined($r->dir_config('lonSSOUserUnknownRedirect')))) {
440: $r->subprocess_env->set('SSOUserUnknown' => $user);
441: $r->subprocess_env->set('SSOUserDomain' => $domain);
442: if (grep(/^sso$/,@cancreate)) {
443: $r->set_handlers('PerlHandler'=> [\&Apache::createaccount::handler]);
444: $r->handler('perl-script');
445: } else {
446: $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
447: $r->set_handlers('PerlHandler'=> undef);
448: }
449: return OK;
450: }
451: }
452: return undef;
453: }
454:
455: sub needs_symb_check {
456: my ($requrl) = @_;
457: $requrl=~/\.(\w+)$/;
458: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
459: ($requrl=~/^\/adm\/.*\/(aboutme|smppg|bulletinboard)(\?|$ )/x) ||
460: ($requrl=~/^\/adm\/wrapper\//) ||
461: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
462: ($requrl=~m|\.problem/smpedit$|) ||
463: ($requrl=~/^\/public\/.*\/syllabus$/) ||
464: ($requrl=~/^\/adm\/(viewclasslist|navmaps)$/) ||
465: ($requrl=~/^\/adm\/.*\/aboutme\/portfolio(\?|$)/)) {
466: return 1;
467: }
468: return;
469: }
470:
471: sub handler {
472: my $r = shift;
473: my $requrl=$r->uri;
474:
475: if ($requrl =~ m{^/res/adm/pages/[^/]+\.(gif|png)$}) {
476: return OK;
477: }
478:
479: if (&Apache::lonnet::is_domainimage($requrl)) {
480: return OK;
481: }
482:
483: my %user;
484: my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);
485:
486: unless (($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) {
487: my $result = &sso_login($r,$handle,$user{'name'});
488: if (defined($result)) {
489: return $result;
490: }
491: }
492:
493: my ($is_balancer,$otherserver);
494:
495: if ($handle eq '') {
496: unless ((($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) ||
497: ($requrl =~ m{^/public/$match_domain/$match_courseid/syllabus}) ||
498: ($requrl =~ m{^/adm/help/}) ||
499: ($requrl =~ m{^/res/$match_domain/$match_username/})) {
500: $r->log_reason("Cookie not valid", $r->filename);
501: }
502: } elsif ($handle ne '') {
503:
504: # ------------------------------------------------------ Initialize Environment
505: my $lonidsdir=$r->dir_config('lonIDsDir');
506: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
507:
508: # --------------------------------------------------------- Initialize Language
509:
510: &Apache::lonlocal::get_language_handle($r);
511:
512: }
513:
514: # -------------------------------------------------- Should be a valid user now
515: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
516: # -------------------------------------------------------------- Resource State
517:
518: my ($cdom,$cnum);
519: if ($env{'request.course.id'}) {
520: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
521: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
522: }
523: if ($requrl=~/^\/+(res|uploaded)\//) {
524: $env{'request.state'} = "published";
525: } else {
526: $env{'request.state'} = 'unknown';
527: }
528: $env{'request.filename'} = $r->filename;
529: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
530: my ($suppext,$checkabsolute);
531: if ($requrl =~ m{^/adm/wrapper/ext/}) {
532: my $query = $r->args;
533: if ($query) {
534: my $preserved;
535: foreach my $pair (split(/&/,$query)) {
536: my ($name, $value) = split(/=/,$pair);
537: unless (($name eq 'symb') || ($name eq 'usehttp')) {
538: $preserved .= $pair.'&';
539: }
540: if (($env{'request.course.id'}) && ($name eq 'folderpath')) {
541: if ($value =~ /^supplemental/) {
542: $suppext = 1;
543: }
544: }
545: }
546: $preserved =~ s/\&$//;
547: if ($preserved) {
548: $env{'request.external.querystring'} = $preserved;
549: }
550: }
551: if ($env{'request.course.id'}) {
552: $checkabsolute = 1;
553: }
554: } elsif ($env{'request.course.id'} &&
555: (($requrl =~ m{^/adm/$match_domain/$match_username/aboutme$}) ||
556: ($requrl eq "/public/$cdom/$cnum/syllabus") ||
557: ($requrl =~ m{^/adm/$cdom/$cnum/\d+/ext\.tool$}))) {
558: my $query = $r->args;
559: if ($query) {
560: foreach my $pair (split(/&/,$query)) {
561: my ($name, $value) = split(/=/,$pair);
562: if ($name eq 'folderpath') {
563: if ($value =~ /^supplemental/) {
564: $suppext = 1;
565: }
566: }
567: }
568: }
569: if ($requrl =~ m{^/public/$cdom/$cnum/syllabus$}) {
570: $checkabsolute = 1;
571: }
572: }
573: if ($checkabsolute) {
574: my $hostname = $r->hostname();
575: my $lonhost = &Apache::lonnet::host_from_dns($hostname);
576: if ($lonhost) {
577: my $actual = &Apache::lonnet::absolute_url($hostname);
578: my $exphostname = &Apache::lonnet::hostname($lonhost);
579: my $expected = $Apache::lonnet::protocol{$lonhost}.'://'.$hostname;
580: unless ($actual eq $expected) {
581: $env{'request.use_absolute'} = $expected;
582: }
583: }
584: }
585: # -------------------------------------------------------- Load POST parameters
586:
587: &Apache::lonacc::get_posted_cgi($r);
588:
589: # ------------------------------------------------------ Check if load balancer
590:
591: my $checkexempt;
592: if ($env{'user.loadbalexempt'} eq $r->dir_config('lonHostID')) {
593: if ($env{'user.loadbalcheck.time'} + 600 > time) {
594: $checkexempt = 1;
595: }
596: }
597: if ($env{'user.noloadbalance'} eq $r->dir_config('lonHostID')) {
598: $checkexempt = 1;
599: }
600: unless ($checkexempt) {
601: ($is_balancer,$otherserver) =
602: &Apache::lonnet::check_loadbalancing($env{'user.name'},
603: $env{'user.domain'});
604: if ($is_balancer) {
605: unless (($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) {
606: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
607: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
608: if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
609: $otherserver = $found_server;
610: }
611: }
612: }
613: }
614: if ($is_balancer) {
615: unless (($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) {
616: $r->set_handlers('PerlResponseHandler'=>
617: [\&Apache::switchserver::handler]);
618: if ($otherserver ne '') {
619: $env{'form.otherserver'} = $otherserver;
620: }
621: }
622: unless (($env{'form.origurl'}) || ($r->uri eq '/adm/roles') ||
623: ($r->uri eq '/adm/switchserver') || ($r->uri eq '/adm/sso')) {
624: $env{'form.origurl'} = $r->uri;
625: }
626: }
627: if ($requrl=~m{^/+tiny/+$match_domain/+\w+$}) {
628: if ($env{'user.name'} eq 'public' &&
629: $env{'user.domain'} eq 'public') {
630: $env{'request.firsturl'}=$requrl;
631: return FORBIDDEN;
632: } else {
633: return OK;
634: }
635: }
636: # ---------------------------------------------------------------- Check access
637: my $now = time;
638: if ($requrl !~ m{^/(?:adm|public|(?:prt|zip)spool)/}
639: || $requrl =~ /^\/adm\/.*\/(smppg|bulletinboard)(\?|$ )/x) {
640: my ($access,$poss_symb);
641: if (($env{'request.course.id'}) && (!$suppext) && (&needs_symb_check($requrl))) {
642: unless ($env{'form.symb'}) {
643: if ($r->args) {
644: &Apache::loncommon::get_unprocessed_cgi($r->args,['symb']);
645: }
646: }
647: if ($env{'form.symb'}) {
648: $poss_symb=&Apache::lonnet::symbclean($env{'form.symb'});
649: }
650: if ($poss_symb) {
651: my ($possmap,$resid,$url)=&Apache::lonnet::decode_symb($poss_symb);
652: $url = &Apache::lonnet::clutter($url);
653: unless (($url eq $requrl) && (&Apache::lonnet::is_on_map($possmap))) {
654: undef($poss_symb);
655: }
656: if ($poss_symb) {
657: if ((!$env{'request.role.adv'}) && ($env{'acc.randomout'}) &&
658: ($env{'acc.randomout'}=~/\&\Q$poss_symb\E\&/)) {
659: undef($poss_symb);
660: }
661: }
662: }
663: if ($poss_symb) {
664: $access=&Apache::lonnet::allowed('bre',$requrl,$poss_symb);
665: } else {
666: $access=&Apache::lonnet::allowed('bre',$requrl,'','','','',1);
667: }
668: } else {
669: $access=&Apache::lonnet::allowed('bre',$requrl);
670: }
671: if ($handle eq '') {
672: unless ($access eq 'F') {
673: if ($requrl =~ m{^/res/$match_domain/$match_username/}) {
674: $r->log_reason("Cookie not valid", $r->filename);
675: }
676: }
677: }
678: if ($access eq '1') {
679: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
680: return HTTP_NOT_ACCEPTABLE;
681: }
682: if ($access eq 'A') {
683: &Apache::restrictedaccess::setup_handler($r);
684: return OK;
685: }
686: if ($access eq 'B') {
687: if ($poss_symb) {
688: if ($requrl=~m{^(/adm/.*/aboutme)/portfolio$}) {
689: $requrl = $1;
690: }
691: if (&Apache::lonnet::symbverify($poss_symb,$requrl)) {
692: $env{'request.symb'} = $poss_symb;
693: }
694: }
695: &Apache::blockedaccess::setup_handler($r);
696: return OK;
697: }
698: if ($access eq 'D') {
699: &Apache::lonprotected::setup_handler($r);
700: return OK;
701: }
702: if (($access ne '2') && ($access ne 'F')) {
703: if ($requrl =~ m{^/res/}) {
704: $access = &Apache::lonnet::allowed('bro',$requrl);
705: if ($access ne 'F') {
706: if ($requrl eq '/res/lib/templates/simpleproblem.problem/smpedit') {
707: $access = &Apache::lonnet::allowed('bre','/res/lib/templates/simpleproblem.problem');
708: if ($access ne 'F') {
709: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
710: return HTTP_NOT_ACCEPTABLE;
711: }
712: } else {
713: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
714: return HTTP_NOT_ACCEPTABLE;
715: }
716: }
717: } elsif (($handle =~ /^publicuser_\d+$/) && (&Apache::lonnet::is_portfolio_url($requrl))) {
718: my $clientip = $r->get_remote_host();
719: if (&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip) ne 'F') {
720: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
721: return HTTP_NOT_ACCEPTABLE;
722: }
723: } else {
724: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
725: return HTTP_NOT_ACCEPTABLE;
726: }
727: }
728: }
729: if ($requrl =~ m|^/prtspool/|) {
730: my $start='/prtspool/'.$env{'user.name'}.'_'.
731: $env{'user.domain'};
732: if ($requrl !~ /^\Q$start\E/) {
733: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
734: return HTTP_NOT_ACCEPTABLE;
735: }
736: }
737: if ($requrl =~ m|^/zipspool/|) {
738: my $start='/zipspool/zipout/'.$env{'user.name'}.":".
739: $env{'user.domain'};
740: if ($requrl !~ /^\Q$start\E/) {
741: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
742: return HTTP_NOT_ACCEPTABLE;
743: }
744: }
745: if ($env{'user.name'} eq 'public' &&
746: $env{'user.domain'} eq 'public' &&
747: $requrl !~ m{^/+(res|public|uploaded)/} &&
748: $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
749: $requrl !~ m{^/adm/blockingstatus/.*$} &&
750: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
751: $env{'request.querystring'}=$r->args;
752: $env{'request.firsturl'}=$requrl;
753: return FORBIDDEN;
754: }
755: # ------------------------------------------------------------- This is allowed
756: if ($env{'request.course.id'}) {
757: &Apache::lonnet::countacc($requrl);
758: my $query=$r->args;
759: if (&needs_symb_check($requrl)) {
760: # ------------------------------------- This is serious stuff, get symb and log
761: my $symb;
762: if ($query) {
763: &Apache::loncommon::get_unprocessed_cgi($query,['symb','folderpath']);
764: }
765: if ($env{'form.symb'}) {
766: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
767: if ($requrl eq '/adm/navmaps') {
768: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
769: &Apache::lonnet::symblist($map,$murl => [$murl,$mid]);
770: } elsif ($requrl =~ m|^/adm/wrapper/|
771: || $requrl =~ m|^/adm/coursedocs/showdoc/|) {
772: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
773: if ($map =~ /\.page$/) {
774: my $mapsymb = &Apache::lonnet::symbread($map);
775: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
776: }
777: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
778: 'last_known' =>[$murl,$mid]);
779: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
780: (($requrl=~m|(.*)/smpedit$|) &&
781: &Apache::lonnet::symbverify($symb,$1)) ||
782: (($requrl=~m|(.*/aboutme)/portfolio$|) &&
783: &Apache::lonnet::symbverify($symb,$1))) {
784: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
785: if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) {
786: my $mapsymb = &Apache::lonnet::symbread($map);
787: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
788: }
789: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
790: 'last_known' =>[$murl,$mid]);
791: } else {
792: $r->log_reason('Invalid symb for '.$requrl.': '.
793: $symb);
794: $env{'user.error.msg'}=
795: "$requrl:bre:1:1:Invalid Access";
796: return HTTP_NOT_ACCEPTABLE;
797: }
798: } else {
799: if ($requrl=~m{^(/adm/.*/aboutme)/portfolio$}) {
800: $requrl = $1;
801: }
802: unless ($suppext) {
803: $symb=&Apache::lonnet::symbread($requrl);
804: if (&Apache::lonnet::is_on_map($requrl) && $symb) {
805: my ($encstate,$invalidsymb);
806: unless (&Apache::lonnet::symbverify($symb,$requrl,\$encstate)) {
807: $invalidsymb = 1;
808: #
809: # If $env{'request.enc'} is true, but no encryption for $symb retrieved
810: # by original lonnet::symbread() call, call again to check for an instance
811: # of $requrl in the course which has encryption, and set that as the symb.
812: # If there is no such symb, or symbverify() fails for the new symb proceed
813: # to report invalid symb.
814: #
815: if ($env{'request.enc'} && !$encstate) {
816: my %possibles;
817: my $nocache = 1;
818: $symb = &Apache::lonnet::symbread($requrl,'','','',\%possibles,$nocache);
819: if ($symb) {
820: if (&Apache::lonnet::symbverify($symb,$requrl)) {
821: $invalidsymb = '';
822: }
823: } elsif (keys(%possibles) > 1) {
824: $r->internal_redirect('/adm/ambiguous');
825: return OK;
826: }
827: }
828: if ($invalidsymb) {
829: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
830: $env{'user.error.msg'}=
831: "$requrl:bre:1:1:Invalid Access";
832: return HTTP_NOT_ACCEPTABLE;
833: }
834: }
835: }
836: if ($symb) {
837: my ($map,$mid,$murl)=
838: &Apache::lonnet::decode_symb($symb);
839: if ($requrl eq '/adm/navmaps') {
840: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid]);
841: } else {
842: if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) {
843: my $mapsymb = &Apache::lonnet::symbread($map);
844: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
845: }
846: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
847: 'last_known' =>[$murl,$mid]);
848: }
849: }
850: }
851: }
852: $env{'request.symb'}=$symb;
853: if (($env{'request.symbread.cached.'}) && ($env{'request.symbread.cached.'} ne $symb)) {
854: $env{'request.symbread.cached.'} = $symb;
855: }
856: &Apache::lonnet::courseacclog($symb);
857: } else {
858: # ------------------------------------------------------- This is other content
859: &Apache::lonnet::courseacclog($requrl);
860: }
861: if ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/(docs|supplemental)/.+\.html?$}) {
862: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
863: if ($query) {
864: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit']);
865: if ($env{'form.forceedit'}) {
866: $env{'request.state'} = 'edit';
867: }
868: }
869: }
870: } elsif ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/portfolio/syllabus/.+\.html?$}) {
871: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
872: if ($query) {
873: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit','editmode']);
874: if (($env{'form.forceedit'}) || ($env{'form.editmode'})) {
875: $env{'request.state'} = 'edit';
876: }
877: }
878: }
879: }
880: }
881: return OK;
882: } else {
883: my $defdom=$r->dir_config('lonDefDomain');
884: ($is_balancer,$otherserver) =
885: &Apache::lonnet::check_loadbalancing(undef,$defdom);
886: if ($is_balancer) {
887: $r->set_handlers('PerlResponseHandler'=>
888: [\&Apache::switchserver::handler]);
889: if ($otherserver ne '') {
890: $env{'form.otherserver'} = $otherserver;
891: }
892: }
893: }
894: # -------------------------------------------- See if this is a public resource
895: if ($requrl=~m|^/+adm/+help/+|) {
896: return OK;
897: }
898: # ------------------------------------ See if this is a viewable portfolio file
899: if (&Apache::lonnet::is_portfolio_url($requrl)) {
900: my $clientip = $r->get_remote_host();
901: my $access=&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip);
902: if ($access eq 'A') {
903: &Apache::restrictedaccess::setup_handler($r);
904: return OK;
905: }
906: if (($access ne '2') && ($access ne 'F')) {
907: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
908: return HTTP_NOT_ACCEPTABLE;
909: }
910: }
911:
912: # -------------------------------------------------------------- Not authorized
913: $requrl=~/\.(\w+)$/;
914: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
915: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
916: # ($requrl=~m|^/prtspool/|)) {
917: # -------------------------- Store where they wanted to go and get login screen
918: $env{'request.querystring'}=$r->args;
919: $env{'request.firsturl'}=$requrl;
920: return FORBIDDEN;
921: # } else {
922: # --------------------------------------------------------------------- Goodbye
923: # return HTTP_BAD_REQUEST;
924: # }
925: }
926:
927: 1;
928: __END__
929:
930: =pod
931:
932: =back
933:
934: =cut
935:
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