1: # The LearningOnline Network
2: # Cookie Based Access Handler
3: #
4: # $Id: lonacc.pm,v 1.159.2.5.2.4 2020/10/01 21:37:16 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 ($is_balancer) {
335: if ($otherserver eq '') {
336: my $lowest_load;
337: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($domain);
338: if ($lowest_load > 100) {
339: $otherserver = &Apache::lonnet::spareserver($lowest_load,$lowest_load,1,$domain);
340: }
341: }
342: if ($otherserver ne '') {
343: my @hosts = &Apache::lonnet::current_machine_ids();
344: if (grep(/^\Q$otherserver\E$/,@hosts)) {
345: $hosthere = $otherserver;
346: }
347: }
348: }
349: }
350: if (($is_balancer) && (!$hosthere)) {
351: # login but immediately go to switch server to find us a new
352: # machine
353: &Apache::lonauth::success($r,$user,$domain,$home,'noredirect');
354: foreach my $item (keys(%form)) {
355: $env{'form.'.$item} = $form{$item};
356: }
357: unless ($form{'symb'}) {
358: unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
359: $env{'form.origurl'} = $r->uri;
360: }
361: }
362: $env{'request.sso.login'} = 1;
363: if (defined($r->dir_config("lonSSOReloginServer"))) {
364: $env{'request.sso.reloginserver'} =
365: $r->dir_config('lonSSOReloginServer');
366: }
367: my $redirecturl = '/adm/switchserver';
368: if ($otherserver ne '') {
369: $redirecturl .= '?otherserver='.$otherserver;
370: }
371: $r->internal_redirect($redirecturl);
372: $r->set_handlers('PerlHandler'=> undef);
373: } else {
374: # need to login them in, so generate the need data that
375: # migrate expects to do login
376: my $ip = $r->get_remote_host();
377: my %info=('ip' => $ip,
378: 'domain' => $domain,
379: 'username' => $user,
380: 'server' => $r->dir_config('lonHostID'),
381: 'sso.login' => 1
382: );
383: foreach my $item ('role','symb','iptoken') {
384: if (exists($form{$item})) {
385: $info{$item} = $form{$item};
386: }
387: }
388: unless ($info{'symb'}) {
389: unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
390: $info{'origurl'} = $r->uri;
391: }
392: }
393: if ($r->dir_config("ssodirecturl") == 1) {
394: $info{'origurl'} = $r->uri;
395: }
396: if (defined($r->dir_config("lonSSOReloginServer"))) {
397: $info{'sso.reloginserver'} =
398: $r->dir_config('lonSSOReloginServer');
399: }
400: if (($is_balancer) && ($hosthere)) {
401: $info{'noloadbalance'} = $hosthere;
402: }
403: my $token =
404: &Apache::lonnet::tmpput(\%info,
405: $r->dir_config('lonHostID'));
406: $env{'form.token'} = $token;
407: $r->internal_redirect('/adm/migrateuser');
408: $r->set_handlers('PerlHandler'=> undef);
409: }
410: return OK;
411: } else {
412: &Apache::lonnet::logthis(" SSO authorized unknown user $user ");
413: my @cancreate;
414: my %domconfig =
415: &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
416: if (ref($domconfig{'usercreation'}) eq 'HASH') {
417: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
418: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
419: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
420: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
421: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
422: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
423: }
424: }
425: }
426: if ((grep(/^sso$/,@cancreate)) || (defined($r->dir_config('lonSSOUserUnknownRedirect')))) {
427: $r->subprocess_env->set('SSOUserUnknown' => $user);
428: $r->subprocess_env->set('SSOUserDomain' => $domain);
429: if (grep(/^sso$/,@cancreate)) {
430: $r->set_handlers('PerlHandler'=> [\&Apache::createaccount::handler]);
431: $r->handler('perl-script');
432: } else {
433: $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
434: $r->set_handlers('PerlHandler'=> undef);
435: }
436: return OK;
437: }
438: }
439: return undef;
440: }
441:
442: sub handler {
443: my $r = shift;
444: my $requrl=$r->uri;
445:
446: if ($requrl =~ m{^/res/adm/pages/[^/]+\.(gif|png)$}) {
447: return OK;
448: }
449:
450: if (&Apache::lonnet::is_domainimage($requrl)) {
451: return OK;
452: }
453:
454: my %user;
455: my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);
456:
457: unless (($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) {
458: my $result = &sso_login($r,$handle,$user{'name'});
459: if (defined($result)) {
460: return $result;
461: }
462: }
463:
464: my ($is_balancer,$otherserver);
465:
466: if ($handle eq '') {
467: unless ((($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) ||
468: ($requrl =~ m{^/public/$match_domain/$match_courseid/syllabus}) ||
469: ($requrl =~ m{^/adm/help/}) ||
470: ($requrl =~ m{^/res/$match_domain/$match_username/})) {
471: $r->log_reason("Cookie not valid", $r->filename);
472: }
473: } elsif ($handle ne '') {
474:
475: # ------------------------------------------------------ Initialize Environment
476: my $lonidsdir=$r->dir_config('lonIDsDir');
477: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
478:
479: # --------------------------------------------------------- Initialize Language
480:
481: &Apache::lonlocal::get_language_handle($r);
482:
483: }
484:
485: # -------------------------------------------------- Should be a valid user now
486: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
487: # -------------------------------------------------------------- Resource State
488:
489: my ($cdom,$cnum);
490: if ($env{'request.course.id'}) {
491: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
492: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
493: }
494: if ($requrl=~/^\/+(res|uploaded)\//) {
495: $env{'request.state'} = "published";
496: } else {
497: $env{'request.state'} = 'unknown';
498: }
499: $env{'request.filename'} = $r->filename;
500: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
501: my ($suppext,$checkabsolute);
502: if ($requrl =~ m{^/adm/wrapper/ext/}) {
503: my $query = $r->args;
504: if ($query) {
505: my $preserved;
506: foreach my $pair (split(/&/,$query)) {
507: my ($name, $value) = split(/=/,$pair);
508: unless ($name eq 'symb') {
509: $preserved .= $pair.'&';
510: }
511: if (($env{'request.course.id'}) && ($name eq 'folderpath')) {
512: if ($value =~ /^supplemental/) {
513: $suppext = 1;
514: }
515: }
516: }
517: $preserved =~ s/\&$//;
518: if ($preserved) {
519: $env{'request.external.querystring'} = $preserved;
520: }
521: }
522: if ($env{'request.course.id'}) {
523: $checkabsolute = 1;
524: }
525: } elsif ($env{'request.course.id'} &&
526: (($requrl =~ m{^/adm/$match_domain/$match_username/aboutme$}) ||
527: ($requrl =~ m{^/public/$cdom/$cnum/syllabus$}) ||
528: ($requrl =~ m{^/adm/$cdom/$cnum/\d+/ext\.tool$}))) {
529: my $query = $r->args;
530: if ($query) {
531: foreach my $pair (split(/&/,$query)) {
532: my ($name, $value) = split(/=/,$pair);
533: if ($name eq 'folderpath') {
534: if ($value =~ /^supplemental/) {
535: $suppext = 1;
536: }
537: last;
538: }
539: }
540: }
541: if ($requrl =~ m{^/public/$cdom/$cnum/syllabus$}) {
542: $checkabsolute = 1;
543: }
544: }
545: if ($checkabsolute) {
546: my $hostname = $r->hostname();
547: my $lonhost = &Apache::lonnet::host_from_dns($hostname);
548: if ($lonhost) {
549: my $actual = &Apache::lonnet::absolute_url($hostname);
550: my $exphostname = &Apache::lonnet::hostname($lonhost);
551: my $expected = $Apache::lonnet::protocol{$lonhost}.'://'.$hostname;
552: unless ($actual eq $expected) {
553: $env{'request.use_absolute'} = $expected;
554: }
555: }
556: }
557: # -------------------------------------------------------- Load POST parameters
558:
559: &Apache::lonacc::get_posted_cgi($r);
560:
561: # ------------------------------------------------------ Check if load balancer
562:
563: my $checkexempt;
564: if ($env{'user.loadbalexempt'} eq $r->dir_config('lonHostID')) {
565: if ($env{'user.loadbalcheck.time'} + 600 > time) {
566: $checkexempt = 1;
567: }
568: }
569: if ($env{'user.noloadbalance'} eq $r->dir_config('lonHostID')) {
570: $checkexempt = 1;
571: }
572: unless ($checkexempt) {
573: ($is_balancer,$otherserver) =
574: &Apache::lonnet::check_loadbalancing($env{'user.name'},
575: $env{'user.domain'});
576: }
577: if ($is_balancer) {
578: $r->set_handlers('PerlResponseHandler'=>
579: [\&Apache::switchserver::handler]);
580: if ($otherserver ne '') {
581: $env{'form.otherserver'} = $otherserver;
582: }
583: unless (($env{'form.origurl'}) || ($r->uri eq '/adm/roles') ||
584: ($r->uri eq '/adm/switchserver') || ($r->uri eq '/adm/sso')) {
585: $env{'form.origurl'} = $r->uri;
586: }
587: }
588: if ($requrl=~m{^/+tiny/+$match_domain/+\w+$}) {
589: return OK;
590: }
591:
592: # ---------------------------------------------------------------- Check access
593: my $now = time;
594: my $check_symb;
595: if ($requrl !~ m{^/(?:adm|public|prtspool)/}
596: || $requrl =~ /^\/adm\/.*\/(smppg|bulletinboard)(\?|$ )/x) {
597: my ($access,$poss_symb);
598: if (($env{'request.course.id'}) && (!$suppext)) {
599: $requrl=~/\.(\w+)$/;
600: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
601: ($requrl=~/^\/adm\/.*\/(aboutme|smppg|bulletinboard)(\?|$ )/x) ||
602: ($requrl=~/^\/adm\/wrapper\//) ||
603: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
604: ($requrl=~m|\.problem/smpedit$|) ||
605: ($requrl=~/^\/public\/.*\/syllabus$/) ||
606: ($requrl=~/^\/adm\/(viewclasslist|navmaps)$/) ||
607: ($requrl=~/^\/adm\/.*\/aboutme\/portfolio(\?|$)/)
608: ($requrl=~m{^/adm/$cdom/$cnum/\d+/ext\.tool$})) {
609: $check_symb = 1;
610: }
611: }
612: if ($check_symb) {
613: if ($env{'form.symb'}) {
614: $poss_symb=&Apache::lonnet::symbclean($env{'form.symb'});
615: } elsif (($env{'request.course.id'}) && ($r->args ne '')) {
616: my $query = $r->args;
617: foreach my $pair (split(/&/,$query)) {
618: my ($name, $value) = split(/=/,$pair);
619: $name = &unescape($name);
620: $value =~ tr/+/ /;
621: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
622: if ($name eq 'symb') {
623: $poss_symb = &Apache::lonnet::symbclean($value);
624: last;
625: }
626: }
627: }
628: if ($poss_symb) {
629: my ($possmap,$resid,$url)=&Apache::lonnet::decode_symb($poss_symb);
630: $url = &Apache::lonnet::clutter($url);
631: unless (($url eq $requrl) && (&Apache::lonnet::is_on_map($possmap))) {
632: undef($poss_symb);
633: }
634: if ($poss_symb) {
635: if ((!$env{'request.role.adv'}) && ($env{'acc.randomout'}) &&
636: ($env{'acc.randomout'}=~/\&\Q$poss_symb\E\&/)) {
637: undef($poss_symb);
638: }
639: }
640: }
641: if ($poss_symb) {
642: $access=&Apache::lonnet::allowed('bre',$requrl,$poss_symb);
643: } else {
644: $access=&Apache::lonnet::allowed('bre',$requrl,'','','','',1);
645: }
646: } else {
647: $access=&Apache::lonnet::allowed('bre',$requrl);
648: }
649: if ($handle eq '') {
650: unless ($access eq 'F') {
651: if ($requrl =~ m{^/res/$match_domain/$match_username/}) {
652: $r->log_reason("Cookie not valid", $r->filename);
653: }
654: }
655: }
656: if ($access eq '1') {
657: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
658: return HTTP_NOT_ACCEPTABLE;
659: }
660: if ($access eq 'A') {
661: &Apache::restrictedaccess::setup_handler($r);
662: return OK;
663: }
664: if ($access eq 'B') {
665: if ($poss_symb) {
666: if ($requrl=~m{^(/adm/.*/aboutme)/portfolio$}) {
667: $requrl = $1;
668: }
669: if (&Apache::lonnet::symbverify($poss_symb,$requrl)) {
670: $env{'request.symb'} = $poss_symb;
671: }
672: }
673: &Apache::blockedaccess::setup_handler($r);
674: return OK;
675: }
676: if (($access ne '2') && ($access ne 'F')) {
677: if ($requrl =~ m{^/res/}) {
678: $access = &Apache::lonnet::allowed('bro',$requrl);
679: if ($access ne 'F') {
680: if ($requrl eq '/res/lib/templates/simpleproblem.problem/smpedit') {
681: $access = &Apache::lonnet::allowed('bre','/res/lib/templates/simpleproblem.problem');
682: if ($access ne 'F') {
683: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
684: return HTTP_NOT_ACCEPTABLE;
685: }
686: } else {
687: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
688: return HTTP_NOT_ACCEPTABLE;
689: }
690: }
691: } elsif (($handle =~ /^publicuser_\d+$/) && (&Apache::lonnet::is_portfolio_url($requrl))) {
692: my $clientip = $r->get_remote_host();
693: if (&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip) ne 'F') {
694: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
695: return HTTP_NOT_ACCEPTABLE;
696: }
697: } else {
698: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
699: return HTTP_NOT_ACCEPTABLE;
700: }
701: }
702: }
703: if ($requrl =~ m|^/prtspool/|) {
704: my $start='/prtspool/'.$env{'user.name'}.'_'.
705: $env{'user.domain'};
706: if ($requrl !~ /^\Q$start\E/) {
707: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
708: return HTTP_NOT_ACCEPTABLE;
709: }
710: }
711: if ($requrl =~ m|^/zipspool/|) {
712: my $start='/zipspool/zipout/'.$env{'user.name'}.":".
713: $env{'user.domain'};
714: if ($requrl !~ /^\Q$start\E/) {
715: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
716: return HTTP_NOT_ACCEPTABLE;
717: }
718: }
719: if ($env{'user.name'} eq 'public' &&
720: $env{'user.domain'} eq 'public' &&
721: $requrl !~ m{^/+(res|public|uploaded)/} &&
722: $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
723: $requrl !~ m{^/adm/blockingstatus/.*$} &&
724: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
725: $env{'request.querystring'}=$r->args;
726: $env{'request.firsturl'}=$requrl;
727: return FORBIDDEN;
728: }
729: # ------------------------------------------------------------- This is allowed
730: if ($env{'request.course.id'}) {
731: &Apache::lonnet::countacc($requrl);
732: my $query=$r->args;
733: if ($check_symb) {
734: # ------------------------------------- This is serious stuff, get symb and log
735: my $symb;
736: if ($query) {
737: &Apache::loncommon::get_unprocessed_cgi($query,['symb','folderpath']);
738: }
739: if ($env{'form.symb'}) {
740: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
741: if ($requrl =~ m|^/adm/wrapper/|
742: || $requrl =~ m|^/adm/coursedocs/showdoc/|) {
743: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
744: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
745: 'last_known' =>[$murl,$mid]);
746: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
747: (($requrl=~m|(.*)/smpedit$|) &&
748: &Apache::lonnet::symbverify($symb,$1)) ||
749: (($requrl=~m|(.*/aboutme)/portfolio$|) &&
750: &Apache::lonnet::symbverify($symb,$1))) {
751: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
752: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
753: 'last_known' =>[$murl,$mid]);
754: } else {
755: $r->log_reason('Invalid symb for '.$requrl.': '.
756: $symb);
757: $env{'user.error.msg'}=
758: "$requrl:bre:1:1:Invalid Access";
759: return HTTP_NOT_ACCEPTABLE;
760: }
761: } else {
762: if ($requrl=~m{^(/adm/.*/aboutme)/portfolio$}) {
763: $requrl = $1;
764: }
765: $symb=&Apache::lonnet::symbread($requrl);
766: if (&Apache::lonnet::is_on_map($requrl) && $symb) {
767: my ($encstate,$invalidsymb);
768: unless (&Apache::lonnet::symbverify($symb,$requrl,\$encstate)) {
769: $invalidsymb = 1;
770: #
771: # If $env{'request.enc'} is true, but no encryption for $symb retrieved
772: # by original lonnet::symbread() call, call again to check for an instance
773: # of $requrl in the course which has encryption, and set that as the symb.
774: # If there is no such symb, or symbverify() fails for the new symb proceed
775: # to report invalid symb.
776: #
777: if ($env{'request.enc'} && !$encstate) {
778: my %possibles;
779: my $nocache = 1;
780: $symb = &Apache::lonnet::symbread($requrl,'','','',\%possibles,$nocache);
781: if ($symb) {
782: if (&Apache::lonnet::symbverify($symb,$requrl)) {
783: $invalidsymb = '';
784: }
785: } elsif (keys(%possibles) > 1) {
786: $r->internal_redirect('/adm/ambiguous');
787: return OK;
788: }
789: }
790: if ($invalidsymb) {
791: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
792: $env{'user.error.msg'}=
793: "$requrl:bre:1:1:Invalid Access";
794: return HTTP_NOT_ACCEPTABLE;
795: }
796: }
797: }
798: if ($symb) {
799: my ($map,$mid,$murl)=
800: &Apache::lonnet::decode_symb($symb);
801: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
802: 'last_known' =>[$murl,$mid]);
803: }
804: }
805: $env{'request.symb'}=$symb;
806: if (($env{'request.symbread.cached.'}) && ($env{'request.symbread.cached.'} ne $symb)) {
807: $env{'request.symbread.cached.'} = $symb;
808: }
809: &Apache::lonnet::courseacclog($symb);
810: } else {
811: # ------------------------------------------------------- This is other content
812: &Apache::lonnet::courseacclog($requrl);
813: }
814: if ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/(docs|supplemental)/.+\.html?$}) {
815: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
816: if ($query) {
817: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit']);
818: if ($env{'form.forceedit'}) {
819: $env{'request.state'} = 'edit';
820: }
821: }
822: }
823: } elsif ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/portfolio/syllabus/.+\.html?$}) {
824: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
825: if ($query) {
826: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit','editmode']);
827: if (($env{'form.forceedit'}) || ($env{'form.editmode'})) {
828: $env{'request.state'} = 'edit';
829: }
830: }
831: }
832: }
833: }
834: return OK;
835: } else {
836: my $defdom=$r->dir_config('lonDefDomain');
837: ($is_balancer,$otherserver) =
838: &Apache::lonnet::check_loadbalancing(undef,$defdom);
839: if ($is_balancer) {
840: $r->set_handlers('PerlResponseHandler'=>
841: [\&Apache::switchserver::handler]);
842: if ($otherserver ne '') {
843: $env{'form.otherserver'} = $otherserver;
844: }
845: }
846: }
847: # -------------------------------------------- See if this is a public resource
848: if ($requrl=~m|^/+adm/+help/+|) {
849: return OK;
850: }
851: # ------------------------------------ See if this is a viewable portfolio file
852: if (&Apache::lonnet::is_portfolio_url($requrl)) {
853: my $clientip = $r->get_remote_host();
854: my $access=&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip);
855: if ($access eq 'A') {
856: &Apache::restrictedaccess::setup_handler($r);
857: return OK;
858: }
859: if (($access ne '2') && ($access ne 'F')) {
860: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
861: return HTTP_NOT_ACCEPTABLE;
862: }
863: }
864:
865: # -------------------------------------------------------------- Not authorized
866: $requrl=~/\.(\w+)$/;
867: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
868: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
869: # ($requrl=~m|^/prtspool/|)) {
870: # -------------------------- Store where they wanted to go and get login screen
871: $env{'request.querystring'}=$r->args;
872: $env{'request.firsturl'}=$requrl;
873: return FORBIDDEN;
874: # } else {
875: # --------------------------------------------------------------------- Goodbye
876: # return HTTP_BAD_REQUEST;
877: # }
878: }
879:
880: 1;
881: __END__
882:
883: =pod
884:
885: =back
886:
887: =cut
888:
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