1: # The LearningOnline Network
2: # Cookie Based Access Handler
3: #
4: # $Id: lonacc.pm,v 1.159.2.11 2020/09/28 01:31:42 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: $env{'request.sso.login'} = 1;
359: if (defined($r->dir_config("lonSSOReloginServer"))) {
360: $env{'request.sso.reloginserver'} =
361: $r->dir_config('lonSSOReloginServer');
362: }
363: my $redirecturl = '/adm/switchserver';
364: if ($otherserver ne '') {
365: $redirecturl .= '?otherserver='.$otherserver;
366: }
367: $r->internal_redirect($redirecturl);
368: $r->set_handlers('PerlHandler'=> undef);
369: } else {
370: # need to login them in, so generate the need data that
371: # migrate expects to do login
372: my $ip = $r->get_remote_host();
373: my %info=('ip' => $ip,
374: 'domain' => $domain,
375: 'username' => $user,
376: 'server' => $r->dir_config('lonHostID'),
377: 'sso.login' => 1
378: );
379: foreach my $item ('role','symb','iptoken') {
380: if (exists($form{$item})) {
381: $info{$item} = $form{$item};
382: }
383: }
384: unless ($info{'symb'}) {
385: unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
386: $info{'origurl'} = $r->uri;
387: }
388: }
389: if ($r->dir_config("ssodirecturl") == 1) {
390: $info{'origurl'} = $r->uri;
391: }
392: if (defined($r->dir_config("lonSSOReloginServer"))) {
393: $info{'sso.reloginserver'} =
394: $r->dir_config('lonSSOReloginServer');
395: }
396: if (($is_balancer) && ($hosthere)) {
397: $info{'noloadbalance'} = $hosthere;
398: }
399: my $token =
400: &Apache::lonnet::tmpput(\%info,
401: $r->dir_config('lonHostID'));
402: $env{'form.token'} = $token;
403: $r->internal_redirect('/adm/migrateuser');
404: $r->set_handlers('PerlHandler'=> undef);
405: }
406: return OK;
407: } else {
408: &Apache::lonnet::logthis(" SSO authorized unknown user $user ");
409: my @cancreate;
410: my %domconfig =
411: &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
412: if (ref($domconfig{'usercreation'}) eq 'HASH') {
413: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
414: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
415: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
416: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
417: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
418: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
419: }
420: }
421: }
422: if ((grep(/^sso$/,@cancreate)) || (defined($r->dir_config('lonSSOUserUnknownRedirect')))) {
423: $r->subprocess_env->set('SSOUserUnknown' => $user);
424: $r->subprocess_env->set('SSOUserDomain' => $domain);
425: if (grep(/^sso$/,@cancreate)) {
426: $r->set_handlers('PerlHandler'=> [\&Apache::createaccount::handler]);
427: $r->handler('perl-script');
428: } else {
429: $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
430: $r->set_handlers('PerlHandler'=> undef);
431: }
432: return OK;
433: }
434: }
435: return undef;
436: }
437:
438: sub needs_symb_check {
439: my ($requrl) = @_;
440: $requrl=~/\.(\w+)$/;
441: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
442: ($requrl=~/^\/adm\/.*\/(aboutme|smppg|bulletinboard)(\?|$ )/x) ||
443: ($requrl=~/^\/adm\/wrapper\//) ||
444: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
445: ($requrl=~m|\.problem/smpedit$|) ||
446: ($requrl=~/^\/public\/.*\/syllabus$/) ||
447: ($requrl=~/^\/adm\/(viewclasslist|navmaps)$/) ||
448: ($requrl=~/^\/adm\/.*\/aboutme\/portfolio(\?|$)/)) {
449: return 1;
450: }
451: return;
452: }
453:
454: sub handler {
455: my $r = shift;
456: my $requrl=$r->uri;
457:
458: if ($requrl =~ m{^/res/adm/pages/[^/]+\.(gif|png)$}) {
459: return OK;
460: }
461:
462: if (&Apache::lonnet::is_domainimage($requrl)) {
463: return OK;
464: }
465:
466: my %user;
467: my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);
468:
469: unless (($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) {
470: my $result = &sso_login($r,$handle,$user{'name'});
471: if (defined($result)) {
472: return $result;
473: }
474: }
475:
476: my ($is_balancer,$otherserver);
477:
478: if ($handle eq '') {
479: unless ((($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) ||
480: ($requrl =~ m{^/public/$match_domain/$match_courseid/syllabus}) ||
481: ($requrl =~ m{^/adm/help/}) ||
482: ($requrl =~ m{^/res/$match_domain/$match_username/})) {
483: $r->log_reason("Cookie not valid", $r->filename);
484: }
485: } elsif ($handle ne '') {
486:
487: # ------------------------------------------------------ Initialize Environment
488: my $lonidsdir=$r->dir_config('lonIDsDir');
489: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
490:
491: # --------------------------------------------------------- Initialize Language
492:
493: &Apache::lonlocal::get_language_handle($r);
494:
495: }
496:
497: # -------------------------------------------------- Should be a valid user now
498: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
499: # -------------------------------------------------------------- Resource State
500:
501: my ($cdom,$cnum);
502: if ($env{'request.course.id'}) {
503: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
504: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
505: }
506: if ($requrl=~/^\/+(res|uploaded)\//) {
507: $env{'request.state'} = "published";
508: } else {
509: $env{'request.state'} = 'unknown';
510: }
511: $env{'request.filename'} = $r->filename;
512: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
513: my ($suppext,$checkabsolute);
514: if ($requrl =~ m{^/adm/wrapper/ext/}) {
515: my $query = $r->args;
516: if ($query) {
517: my $preserved;
518: foreach my $pair (split(/&/,$query)) {
519: my ($name, $value) = split(/=/,$pair);
520: unless (($name eq 'symb') || ($name eq 'usehttp')) {
521: $preserved .= $pair.'&';
522: }
523: if (($env{'request.course.id'}) && ($name eq 'folderpath')) {
524: if ($value =~ /^supplemental/) {
525: $suppext = 1;
526: }
527: }
528: }
529: $preserved =~ s/\&$//;
530: if ($preserved) {
531: $env{'request.external.querystring'} = $preserved;
532: }
533: }
534: if ($env{'request.course.id'}) {
535: $checkabsolute = 1;
536: }
537: } elsif ($env{'request.course.id'} &&
538: (($requrl =~ m{^/adm/$match_domain/$match_username/aboutme$}) ||
539: ($requrl =~ m{^/public/$cdom/$cnum/syllabus$}))) {
540: my $query = $r->args;
541: if ($query) {
542: foreach my $pair (split(/&/,$query)) {
543: my ($name, $value) = split(/=/,$pair);
544: if ($name eq 'folderpath') {
545: if ($value =~ /^supplemental/) {
546: $suppext = 1;
547: }
548: }
549: }
550: }
551: if ($requrl =~ m{^/public/$cdom/$cnum/syllabus$}) {
552: $checkabsolute = 1;
553: }
554: }
555: if ($checkabsolute) {
556: my $hostname = $r->hostname();
557: my $lonhost = &Apache::lonnet::host_from_dns($hostname);
558: if ($lonhost) {
559: my $actual = &Apache::lonnet::absolute_url($hostname);
560: my $expected = $Apache::lonnet::protocol{$lonhost}.'://'.$hostname;
561: unless ($actual eq $expected) {
562: $env{'request.use_absolute'} = $expected;
563: }
564: }
565: }
566: # -------------------------------------------------------- Load POST parameters
567:
568: &Apache::lonacc::get_posted_cgi($r);
569:
570: # ------------------------------------------------------ Check if load balancer
571:
572: my $checkexempt;
573: if ($env{'user.loadbalexempt'} eq $r->dir_config('lonHostID')) {
574: if ($env{'user.loadbalcheck.time'} + 600 > time) {
575: $checkexempt = 1;
576: }
577: }
578: if ($env{'user.noloadbalance'} eq $r->dir_config('lonHostID')) {
579: $checkexempt = 1;
580: }
581: unless ($checkexempt) {
582: ($is_balancer,$otherserver) =
583: &Apache::lonnet::check_loadbalancing($env{'user.name'},
584: $env{'user.domain'});
585: if ($is_balancer) {
586: unless (($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) {
587: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
588: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
589: if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
590: $otherserver = $found_server;
591: }
592: }
593: }
594: }
595: if ($is_balancer) {
596: unless (($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) {
597: $r->set_handlers('PerlResponseHandler'=>
598: [\&Apache::switchserver::handler]);
599: if ($otherserver ne '') {
600: $env{'form.otherserver'} = $otherserver;
601: }
602: }
603: unless (($env{'form.origurl'}) || ($r->uri eq '/adm/roles') ||
604: ($r->uri eq '/adm/switchserver') || ($r->uri eq '/adm/sso')) {
605: $env{'form.origurl'} = $r->uri;
606: }
607: }
608:
609: # ---------------------------------------------------------------- Check access
610: my $now = time;
611: if ($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) && (&needs_symb_check($requrl))) {
615: unless ($env{'form.symb'}) {
616: if ($r->args) {
617: &Apache::loncommon::get_unprocessed_cgi($r->args,['symb']);
618: }
619: }
620: if ($env{'form.symb'}) {
621: $poss_symb=&Apache::lonnet::symbclean($env{'form.symb'});
622: }
623: if ($poss_symb) {
624: my ($possmap,$resid,$url)=&Apache::lonnet::decode_symb($poss_symb);
625: $url = &Apache::lonnet::clutter($url);
626: unless (($url eq $requrl) && (&Apache::lonnet::is_on_map($possmap))) {
627: undef($poss_symb);
628: }
629: if ($poss_symb) {
630: if ((!$env{'request.role.adv'}) && ($env{'acc.randomout'}) &&
631: ($env{'acc.randomout'}=~/\&\Q$poss_symb\E\&/)) {
632: undef($poss_symb);
633: }
634: }
635: }
636: if ($poss_symb) {
637: $access=&Apache::lonnet::allowed('bre',$requrl,$poss_symb);
638: } else {
639: $access=&Apache::lonnet::allowed('bre',$requrl,'','','','',1);
640: }
641: } else {
642: $access=&Apache::lonnet::allowed('bre',$requrl);
643: }
644: if ($handle eq '') {
645: unless ($access eq 'F') {
646: if ($requrl =~ m{^/res/$match_domain/$match_username/}) {
647: $r->log_reason("Cookie not valid", $r->filename);
648: }
649: }
650: }
651: if ($access eq '1') {
652: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
653: return HTTP_NOT_ACCEPTABLE;
654: }
655: if ($access eq 'A') {
656: &Apache::restrictedaccess::setup_handler($r);
657: return OK;
658: }
659: if ($access eq 'B') {
660: if ($poss_symb) {
661: if ($requrl=~m{^(/adm/.*/aboutme)/portfolio$}) {
662: $requrl = $1;
663: }
664: if (&Apache::lonnet::symbverify($poss_symb,$requrl)) {
665: $env{'request.symb'} = $poss_symb;
666: }
667: }
668: &Apache::blockedaccess::setup_handler($r);
669: return OK;
670: }
671: if (($access ne '2') && ($access ne 'F')) {
672: if ($requrl =~ m{^/res/}) {
673: $access = &Apache::lonnet::allowed('bro',$requrl);
674: if ($access ne 'F') {
675: if ($requrl eq '/res/lib/templates/simpleproblem.problem/smpedit') {
676: $access = &Apache::lonnet::allowed('bre','/res/lib/templates/simpleproblem.problem');
677: if ($access ne 'F') {
678: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
679: return HTTP_NOT_ACCEPTABLE;
680: }
681: } else {
682: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
683: return HTTP_NOT_ACCEPTABLE;
684: }
685: }
686: } elsif (($handle =~ /^publicuser_\d+$/) && (&Apache::lonnet::is_portfolio_url($requrl))) {
687: my $clientip = $r->get_remote_host();
688: if (&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip) ne 'F') {
689: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
690: return HTTP_NOT_ACCEPTABLE;
691: }
692: } else {
693: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
694: return HTTP_NOT_ACCEPTABLE;
695: }
696: }
697: }
698: if ($requrl =~ m|^/prtspool/|) {
699: my $start='/prtspool/'.$env{'user.name'}.'_'.
700: $env{'user.domain'};
701: if ($requrl !~ /^\Q$start\E/) {
702: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
703: return HTTP_NOT_ACCEPTABLE;
704: }
705: }
706: if ($requrl =~ m|^/zipspool/|) {
707: my $start='/zipspool/zipout/'.$env{'user.name'}.":".
708: $env{'user.domain'};
709: if ($requrl !~ /^\Q$start\E/) {
710: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
711: return HTTP_NOT_ACCEPTABLE;
712: }
713: }
714: if ($env{'user.name'} eq 'public' &&
715: $env{'user.domain'} eq 'public' &&
716: $requrl !~ m{^/+(res|public|uploaded)/} &&
717: $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
718: $requrl !~ m{^/adm/blockingstatus/.*$} &&
719: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
720: $env{'request.querystring'}=$r->args;
721: $env{'request.firsturl'}=$requrl;
722: return FORBIDDEN;
723: }
724: # ------------------------------------------------------------- This is allowed
725: if ($env{'request.course.id'}) {
726: &Apache::lonnet::countacc($requrl);
727: my $query=$r->args;
728: if (&needs_symb_check($requrl)) {
729: # ------------------------------------- This is serious stuff, get symb and log
730: my $symb;
731: if ($query) {
732: &Apache::loncommon::get_unprocessed_cgi($query,['symb','folderpath']);
733: }
734: if ($env{'form.symb'}) {
735: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
736: if ($requrl eq '/adm/navmaps') {
737: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
738: &Apache::lonnet::symblist($map,$murl => [$murl,$mid]);
739: } elsif ($requrl =~ m|^/adm/wrapper/|
740: || $requrl =~ m|^/adm/coursedocs/showdoc/|) {
741: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
742: if ($map =~ /\.page$/) {
743: my $mapsymb = &Apache::lonnet::symbread($map);
744: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
745: }
746: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
747: 'last_known' =>[$murl,$mid]);
748: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
749: (($requrl=~m|(.*)/smpedit$|) &&
750: &Apache::lonnet::symbverify($symb,$1)) ||
751: (($requrl=~m|(.*/aboutme)/portfolio$|) &&
752: &Apache::lonnet::symbverify($symb,$1))) {
753: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
754: if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) {
755: my $mapsymb = &Apache::lonnet::symbread($map);
756: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
757: }
758: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
759: 'last_known' =>[$murl,$mid]);
760: } else {
761: $r->log_reason('Invalid symb for '.$requrl.': '.
762: $symb);
763: $env{'user.error.msg'}=
764: "$requrl:bre:1:1:Invalid Access";
765: return HTTP_NOT_ACCEPTABLE;
766: }
767: } else {
768: if ($requrl=~m{^(/adm/.*/aboutme)/portfolio$}) {
769: $requrl = $1;
770: }
771: unless ($suppext) {
772: $symb=&Apache::lonnet::symbread($requrl);
773: if (&Apache::lonnet::is_on_map($requrl) && $symb) {
774: my ($encstate,$invalidsymb);
775: unless (&Apache::lonnet::symbverify($symb,$requrl,\$encstate)) {
776: $invalidsymb = 1;
777: #
778: # If $env{'request.enc'} is true, but no encryption for $symb retrieved
779: # by original lonnet::symbread() call, call again to check for an instance
780: # of $requrl in the course which has encryption, and set that as the symb.
781: # If there is no such symb, or symbverify() fails for the new symb proceed
782: # to report invalid symb.
783: #
784: if ($env{'request.enc'} && !$encstate) {
785: my %possibles;
786: my $nocache = 1;
787: $symb = &Apache::lonnet::symbread($requrl,'','','',\%possibles,$nocache);
788: if ($symb) {
789: if (&Apache::lonnet::symbverify($symb,$requrl)) {
790: $invalidsymb = '';
791: }
792: } elsif (keys(%possibles) > 1) {
793: $r->internal_redirect('/adm/ambiguous');
794: return OK;
795: }
796: }
797: if ($invalidsymb) {
798: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
799: $env{'user.error.msg'}=
800: "$requrl:bre:1:1:Invalid Access";
801: return HTTP_NOT_ACCEPTABLE;
802: }
803: }
804: }
805: if ($symb) {
806: my ($map,$mid,$murl)=
807: &Apache::lonnet::decode_symb($symb);
808: if ($requrl eq '/adm/navmaps') {
809: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid]);
810: } else {
811: if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) {
812: my $mapsymb = &Apache::lonnet::symbread($map);
813: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
814: }
815: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
816: 'last_known' =>[$murl,$mid]);
817: }
818: }
819: }
820: }
821: $env{'request.symb'}=$symb;
822: if (($env{'request.symbread.cached.'}) && ($env{'request.symbread.cached.'} ne $symb)) {
823: $env{'request.symbread.cached.'} = $symb;
824: }
825: &Apache::lonnet::courseacclog($symb);
826: } else {
827: # ------------------------------------------------------- This is other content
828: &Apache::lonnet::courseacclog($requrl);
829: }
830: if ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/(docs|supplemental)/.+\.html?$}) {
831: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
832: if ($query) {
833: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit']);
834: if ($env{'form.forceedit'}) {
835: $env{'request.state'} = 'edit';
836: }
837: }
838: }
839: } elsif ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/portfolio/syllabus/.+\.html?$}) {
840: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
841: if ($query) {
842: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit','editmode']);
843: if (($env{'form.forceedit'}) || ($env{'form.editmode'})) {
844: $env{'request.state'} = 'edit';
845: }
846: }
847: }
848: }
849: }
850: return OK;
851: } else {
852: my $defdom=$r->dir_config('lonDefDomain');
853: ($is_balancer,$otherserver) =
854: &Apache::lonnet::check_loadbalancing(undef,$defdom);
855: if ($is_balancer) {
856: $r->set_handlers('PerlResponseHandler'=>
857: [\&Apache::switchserver::handler]);
858: if ($otherserver ne '') {
859: $env{'form.otherserver'} = $otherserver;
860: }
861: }
862: }
863: # -------------------------------------------- See if this is a public resource
864: if ($requrl=~m|^/+adm/+help/+|) {
865: return OK;
866: }
867: # ------------------------------------ See if this is a viewable portfolio file
868: if (&Apache::lonnet::is_portfolio_url($requrl)) {
869: my $clientip = $r->get_remote_host();
870: my $access=&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip);
871: if ($access eq 'A') {
872: &Apache::restrictedaccess::setup_handler($r);
873: return OK;
874: }
875: if (($access ne '2') && ($access ne 'F')) {
876: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
877: return HTTP_NOT_ACCEPTABLE;
878: }
879: }
880:
881: # -------------------------------------------------------------- Not authorized
882: $requrl=~/\.(\w+)$/;
883: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
884: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
885: # ($requrl=~m|^/prtspool/|)) {
886: # -------------------------- Store where they wanted to go and get login screen
887: $env{'request.querystring'}=$r->args;
888: $env{'request.firsturl'}=$requrl;
889: return FORBIDDEN;
890: # } else {
891: # --------------------------------------------------------------------- Goodbye
892: # return HTTP_BAD_REQUEST;
893: # }
894: }
895:
896: 1;
897: __END__
898:
899: =pod
900:
901: =back
902:
903: =cut
904:
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