File:
[LON-CAPA] /
loncom /
auth /
lonacc.pm
Revision
1.202:
download - view:
text,
annotated -
select for diffs
Tue Dec 7 23:19:00 2021 UTC (2 years, 5 months ago) by
raeburn
Branches:
MAIN
CVS tags:
HEAD
- Change in rev. 1.154 should also apply to xlsx, docx, pptx, xlsm, docm and
pptm files uploaded to a user's portfolio. Eliminate extra byte (line feed),
which would cause Excel to prompt user to "repair" file after download.
1: # The LearningOnline Network
2: # Cookie Based Access Handler
3: #
4: # $Id: lonacc.pm,v 1.202 2021/12/07 23:19:00 raeburn Exp $
5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
28: ###
29:
30: =head1 NAME
31:
32: Apache::lonacc - Cookie Based Access Handler
33:
34: =head1 SYNOPSIS
35:
36: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
37:
38: PerlAccessHandler Apache::lonacc
39:
40: =head1 INTRODUCTION
41:
42: This module enables cookie based authentication and is used
43: to control access for many different LON-CAPA URIs.
44:
45: Whenever the client sends the cookie back to the server,
46: this cookie is handled by either lonacc.pm or loncacc.pm
47: (see srm.conf for what is invoked when). If
48: the cookie is missing or invalid, the user is re-challenged
49: for login information.
50:
51: This is part of the LearningOnline Network with CAPA project
52: described at http://www.lon-capa.org.
53:
54: =head1 HANDLER SUBROUTINE
55:
56: This routine is called by Apache and mod_perl.
57:
58: =over 4
59:
60: =item *
61:
62: transfer profile into environment
63:
64: =item *
65:
66: load POST parameters
67:
68: =item *
69:
70: check access
71:
72: =item *
73:
74: if allowed, get symb, log, generate course statistics if applicable
75:
76: =item *
77:
78: otherwise return error
79:
80: =item *
81:
82: see if public resource
83:
84: =item *
85:
86: store attempted access
87:
88: =back
89:
90: =head1 NOTABLE SUBROUTINES
91:
92: =cut
93:
94:
95: package Apache::lonacc;
96:
97: use strict;
98: use Apache::Constants qw(:common :http :methods);
99: use Apache::File;
100: use Apache::lonnet;
101: use Apache::loncommon();
102: use Apache::lonlocal;
103: use Apache::restrictedaccess();
104: use Apache::blockedaccess();
105: use Apache::lonprotected();
106: use Fcntl qw(:flock);
107: use LONCAPA qw(:DEFAULT :match);
108:
109: sub cleanup {
110: my ($r)=@_;
111: if (! $r->is_initial_req()) { return DECLINED; }
112: &Apache::lonnet::save_cache();
113: return OK;
114: }
115:
116: sub goodbye {
117: my ($r)=@_;
118: &Apache::lonnet::goodbye();
119: return DONE;
120: }
121:
122: ###############################################
123:
124: sub get_posted_cgi {
125: my ($r,$fields) = @_;
126:
127: my $buffer;
128: if ($r->header_in('Content-length')) {
129: $r->read($buffer,$r->header_in('Content-length'),0);
130: }
131: my $content_type = $r->header_in('Content-type');
132: if ($content_type !~ m{^multipart/form-data}) {
133: my @pairs=split(/&/,$buffer);
134: my $pair;
135: foreach $pair (@pairs) {
136: my ($name,$value) = split(/=/,$pair);
137: $value =~ tr/+/ /;
138: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
139: $name =~ tr/+/ /;
140: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
141: if (ref($fields) eq 'ARRAY') {
142: next if (!grep(/^\Q$name\E$/,@{$fields}));
143: }
144: &Apache::loncommon::add_to_env("form.$name",$value);
145: }
146: } else {
147: my ($contentsep) = ($content_type =~ /boundary=\"?([^\";,]+)\"?/);
148: my @lines = split (/\n/,$buffer);
149: my $name='';
150: my $value='';
151: my $fname='';
152: my $fmime='';
153: my $i;
154: for ($i=0;$i<=$#lines;$i++) {
155: if ($lines[$i]=~/^--\Q$contentsep\E/) {
156: if ($name) {
157: chomp($value);
158: if (($r->uri eq '/adm/portfolio') &&
159: ($name eq 'uploaddoc')) {
160: if (length($value) == 1) {
161: $value=~s/[\r\n]$//;
162: }
163: }
164: if ($fname =~ /\.(xls|doc|ppt)(x|m)$/i) {
165: $value=~s/[\r\n]$//;
166: }
167: if (ref($fields) eq 'ARRAY') {
168: next if (!grep(/^\Q$name\E$/,@{$fields}));
169: }
170: if ($fname) {
171: if ($env{'form.symb'} ne '') {
172: my $size = (length($value))/(1024.0 * 1024.0);
173: if (&upload_size_allowed($name,$size,$fname) eq 'ok') {
174: $env{"form.$name.filename"}=$fname;
175: $env{"form.$name.mimetype"}=$fmime;
176: &Apache::loncommon::add_to_env("form.$name",$value);
177: }
178: } else {
179: $env{"form.$name.filename"}=$fname;
180: $env{"form.$name.mimetype"}=$fmime;
181: &Apache::loncommon::add_to_env("form.$name",$value);
182: }
183: } else {
184: $value=~s/\s+$//s;
185: &Apache::loncommon::add_to_env("form.$name",$value);
186: }
187: }
188: if ($i<$#lines) {
189: $i++;
190: $lines[$i]=~
191: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
192: $name=$1;
193: $value='';
194: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
195: $fname=$1;
196: if
197: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
198: $fmime=$1;
199: $i++;
200: } else {
201: $fmime='';
202: }
203: } else {
204: $fname='';
205: $fmime='';
206: }
207: if ($i<$#lines && $lines[$i+1]=~/^Content\-Type\:\s*([\w\-\/]+)/i) {
208: # TODO: something with $1 !
209: $i++;
210: }
211: if ($i<$#lines && $lines[$i+1]=~/^Content\-transfer\-encoding\:\s*([\w\-\/]+)/i) {
212: # TODO: something with $1 !
213: $i++;
214: }
215: $i++;
216: }
217: } else {
218: $value.=$lines[$i]."\n";
219: }
220: }
221: }
222: #
223: # Digested POSTed values
224: #
225: # Remember the way this was originally done (GET or POST)
226: #
227: $env{'request.method'}=$ENV{'REQUEST_METHOD'};
228: #
229: # There may also be stuff in the query string
230: # Tell subsequent handlers that this was GET, not POST, so they can access query string.
231: # Also, unset POSTed content length to cover all tracks.
232: #
233:
234: $r->method_number(M_GET);
235:
236: $r->method('GET');
237: $r->headers_in->unset('Content-length');
238: }
239:
240: =pod
241:
242: =over
243:
244: =item upload_size_allowed()
245:
246: Perform size checks for file uploads to essayresponse items in course context.
247:
248: Add form.HWFILESIZE.$part_$id to %env with file size (MB)
249: If file exceeds maximum allowed size, add form.HWFILETOOBIG.$part_$id to %env.
250:
251: =cut
252:
253: sub upload_size_allowed {
254: my ($name,$size,$fname) = @_;
255: if ($name =~ /^HWFILE(\w+)$/) {
256: my $ident = $1;
257: my $item = 'HWFILESIZE'.$ident;
258: my $savesize = sprintf("%.6f",$size);
259: &Apache::loncommon::add_to_env("form.$item",$savesize);
260: my $maxsize= &Apache::lonnet::EXT("resource.$ident.maxfilesize");
261: if (!$maxsize) {
262: $maxsize = 10.0; # FIXME This should become a domain configuration.
263: }
264: if ($size > $maxsize) {
265: my $warn = 'HWFILETOOBIG'.$ident;
266: &Apache::loncommon::add_to_env("form.$warn",$fname);
267: return;
268: }
269: }
270: return 'ok';
271: }
272:
273: =pod
274:
275: =item sso_login()
276:
277: handle the case of the single sign on user, at this point $r->user
278: will be set and valid; now need to find the loncapa user info, and possibly
279: balance them. If $r->user() is set this means either it was either set by
280: SSO or by checkauthen.pm, if a valid cookie was found. The latter case can
281: be identified by the third arg ($usename), except when lonacc is called in
282: an internal redirect to /adm/switchserver (e.g., load-balancing following
283: successful authentication) -- no cookie set yet. For that particular case
284: simply skip the call to sso_login().
285:
286: returns OK if it was SSO and user was handled.
287: returns undef if not SSO or no means to handle the user.
288:
289: =cut
290:
291: sub sso_login {
292: my ($r,$handle,$username) = @_;
293:
294: if (($r->user eq '') || ($username ne '') || ($r->user eq 'public:public') ||
295: (defined($env{'user.name'}) && (defined($env{'user.domain'}))
296: && ($handle ne ''))) {
297: # not an SSO case or already logged in
298: return undef;
299: }
300:
301: my ($user) = ($r->user =~ m/^($match_username)$/);
302: if ($user eq '') {
303: return undef;
304: }
305:
306: my $query = $r->args;
307: my %form;
308: if ($query) {
309: my @items = ('role','symb','iptoken','origurl','ttoken',
310: 'ltoken','linkkey','logtoken','sso');
311: &Apache::loncommon::get_unprocessed_cgi($query,\@items);
312: foreach my $item (@items) {
313: if (defined($env{'form.'.$item})) {
314: $form{$item} = $env{'form.'.$item};
315: }
316: }
317: }
318:
319: my %sessiondata;
320: if ($form{'iptoken'}) {
321: %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
322: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
323: unless ($sessiondata{'sessionserver'}) {
324: delete($form{'iptoken'});
325: }
326: }
327:
328: my ($linkprot,$linkkey);
329:
330: #
331: # If Shibboleth auth is in use, and a dual SSO and non-SSO login page
332: # is in use, then the query string will contain the logtoken item with
333: # a value set to the name of a .tmp file in /home/httpd/perl/tmp
334: # containing the url to display after authentication, and also,
335: # optionally, role and symb, or linkprot or linkkey (deep-link access).
336: #
337: # If Shibboleth auth is in use, but a dual log-in page is not in use,
338: # and the originally requested URL was /tiny/$domain/$id (i.e.,
339: # for deeplinking), then the query string will contain the sso item
340: # with a value set to the name of a .tmp file in /home/httpd/perl/tmp
341: # containing the url to display after authentication, and also,
342: # optionally, linkprot or linkkey (deep-link access).
343: #
344: # Otherwise the query string may contain role and symb, or if the
345: # originally requested URL was /tiny/$domain/$id (i.e. for deeplinking)
346: # then the query string may contain a ttoken item with a value set
347: # to the name of a .tmp file in /home/httpd/perl/tmp containing either
348: # linkprot or linkkey (deep-link access).
349: #
350: # If deep-linked, i.e., the originally requested URL was /tiny/$domain/$id
351: # the linkkey may have originally been sent in POSTed data, which will
352: # have been processed in lontrans.pm
353: #
354:
355: if ($form{'ttoken'}) {
356: my %info = &Apache::lonnet::tmpget($form{'ttoken'});
357: &Apache::lonnet::tmpdel($form{'ttoken'});
358: if ($info{'origurl'}) {
359: $form{'origurl'} = $info{'origurl'};
360: }
361: if ($info{'linkprot'}) {
362: $linkprot = $info{'linkprot'};
363: } elsif ($info{'linkkey'} ne '') {
364: $linkkey = $info{'linkkey'};
365: }
366: } elsif ($form{'logtoken'}) {
367: my ($firsturl,@rest);
368: my $lonhost = $r->dir_config('lonHostID');
369: my $tmpinfo = &Apache::lonnet::reply('tmpget:'.$form{'logtoken'},$lonhost);
370: my $delete = &Apache::lonnet::tmpdel($form{'logtoken'});
371: unless (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
372: ($tmpinfo eq 'no_such_host')) {
373: (undef,$firsturl,@rest) = split(/&/,$tmpinfo);
374: if ($firsturl ne '') {
375: $firsturl = &unescape($firsturl);
376: }
377: foreach my $item (@rest) {
378: my ($key,$value) = split(/=/,$item);
379: $form{$key} = &unescape($value);
380: }
381: if ($firsturl =~ m{^/tiny/$match_domain/\w+$}) {
382: $form{'origurl'} = $firsturl;
383: }
384: if ($form{'linkprot'}) {
385: $linkprot = $form{'linkprot'};
386: } elsif ($form{'linkkey'} ne '') {
387: $linkkey = $form{'linkkey'};
388: }
389: if ($form{'iptoken'}) {
390: %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
391: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
392: }
393: }
394: } elsif ($form{'sso'}) {
395: my $lonhost = $r->dir_config('lonHostID');
396: my $info = &Apache::lonnet::reply('tmpget:'.$form{'sso'},$lonhost);
397: &Apache::lonnet::tmpdel($form{'sso'});
398: unless (($info=~/^error/) || ($info eq 'con_lost') ||
399: ($info eq 'no_such_host')) {
400: my ($firsturl,@rest)=split(/\&/,$info);
401: if ($firsturl ne '') {
402: $form{'origurl'} = &unescape($firsturl);
403: }
404: foreach my $item (@rest) {
405: my ($key,$value) = split(/=/,$item);
406: $form{$key} = &unescape($value);
407: }
408: if ($form{'linkprot'}) {
409: $linkprot = $form{'linkprot'};
410: } elsif ($form{'linkkey'} ne '') {
411: $linkkey = $form{'linkkey'};
412: }
413: }
414: } elsif ($form{'ltoken'}) {
415: my %link_info = &Apache::lonnet::tmpget($form{'ltoken'});
416: $linkprot = $link_info{'linkprot'};
417: my $delete = &Apache::lonnet::tmpdel($form{'ltoken'});
418: delete($form{'ltoken'});
419: } elsif ($form{'linkkey'} ne '') {
420: $linkkey = $form{'linkkey'};
421: }
422:
423: my $domain = $r->dir_config('lonSSOUserDomain');
424: if ($domain eq '') {
425: $domain = $r->dir_config('lonDefDomain');
426: }
427: my $home=&Apache::lonnet::homeserver($user,$domain);
428: if ($home !~ /(con_lost|no_host|no_such_host)/) {
429: &Apache::lonnet::logthis(" SSO authorized user $user ");
430: my ($is_balancer,$otherserver,$hosthere);
431: if ($form{'iptoken'}) {
432: if (($sessiondata{'domain'} eq $domain) &&
433: ($sessiondata{'username'} eq $user)) {
434: $hosthere = 1;
435: }
436: }
437: unless ($hosthere) {
438: ($is_balancer,$otherserver) =
439: &Apache::lonnet::check_loadbalancing($user,$domain,'login');
440: if ($is_balancer) {
441: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
442: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
443: if (($found_server) && ($balancer_cookie =~ /^\Q$domain\E_\Q$user\E_/)) {
444: $otherserver = $found_server;
445: } elsif ($otherserver eq '') {
446: my $lowest_load;
447: ($otherserver,undef,undef,undef,$lowest_load) = &Apache::lonnet::choose_server($domain);
448: if ($lowest_load > 100) {
449: $otherserver = &Apache::lonnet::spareserver($r,$lowest_load,$lowest_load,1,$domain);
450: }
451: if ($otherserver ne '') {
452: my @hosts = &Apache::lonnet::current_machine_ids();
453: if (grep(/^\Q$otherserver\E$/,@hosts)) {
454: $hosthere = $otherserver;
455: }
456: }
457: }
458: }
459: }
460: if (($is_balancer) && (!$hosthere)) {
461: # login but immediately go to switch server to find us a new
462: # machine
463: &Apache::lonauth::success($r,$user,$domain,$home,'noredirect');
464: foreach my $item (keys(%form)) {
465: $env{'form.'.$item} = $form{$item};
466: }
467: unless (($form{'symb'}) || ($form{'origurl'})) {
468: unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
469: $env{'form.origurl'} = $r->uri;
470: }
471: }
472: if (($r->uri eq '/adm/sso') && ($form{'origurl'} =~ m{^/+tiny/+$match_domain/+\w+$})) {
473: $env{'request.deeplink.login'} = $form{'origurl'};
474: } elsif ($r->uri =~ m{^/+tiny/+$match_domain/+\w+$}) {
475: $env{'request.deeplink.login'} = $r->uri;
476: }
477: if ($env{'request.deeplink.login'}) {
478: if ($linkprot) {
479: $env{'request.linkprot'} = $linkprot;
480: } elsif ($linkkey ne '') {
481: $env{'request.linkkey'} = $linkkey;
482: }
483: }
484: $env{'request.sso.login'} = 1;
485: if (defined($r->dir_config("lonSSOReloginServer"))) {
486: $env{'request.sso.reloginserver'} =
487: $r->dir_config('lonSSOReloginServer');
488: }
489: my $redirecturl = '/adm/switchserver';
490: if ($otherserver ne '') {
491: $redirecturl .= '?otherserver='.$otherserver;
492: }
493: $r->internal_redirect($redirecturl);
494: $r->set_handlers('PerlHandler'=> undef);
495: } else {
496: # need to login them in, so generate the need data that
497: # migrate expects to do login
498: my $ip = &Apache::lonnet::get_requestor_ip($r);
499: my %info=('ip' => $ip,
500: 'domain' => $domain,
501: 'username' => $user,
502: 'server' => $r->dir_config('lonHostID'),
503: 'sso.login' => 1
504: );
505: foreach my $item ('role','symb','iptoken','origurl') {
506: if (exists($form{$item})) {
507: $info{$item} = $form{$item};
508: } elsif ($sessiondata{$item} ne '') {
509: $info{$item} = $sessiondata{$item};
510: }
511: }
512: unless (($info{'symb'}) || ($info{'origurl'})) {
513: unless (($r->uri eq '/adm/roles') || ($r->uri eq '/adm/sso')) {
514: $info{'origurl'} = $r->uri;
515: }
516: }
517: if (($r->uri eq '/adm/sso') && ($form{'origurl'} =~ m{^/+tiny/+$match_domain/+\w+$})) {
518: $info{'deeplink.login'} = $form{'origurl'};
519: } elsif ($r->uri =~ m{^/+tiny/+$match_domain/+\w+$}) {
520: $info{'deeplink.login'} = $r->uri;
521: }
522: if ($info{'deeplink.login'}) {
523: if ($linkprot) {
524: $info{'linkprot'} = $linkprot;
525: } elsif ($linkkey ne '') {
526: $info{'linkkey'} = $linkkey;
527: }
528: }
529: if ($r->dir_config("ssodirecturl") == 1) {
530: $info{'origurl'} = $r->uri;
531: }
532: if (defined($r->dir_config("lonSSOReloginServer"))) {
533: $info{'sso.reloginserver'} =
534: $r->dir_config('lonSSOReloginServer');
535: }
536: if (($is_balancer) && ($hosthere)) {
537: $info{'noloadbalance'} = $hosthere;
538: }
539: my $token =
540: &Apache::lonnet::tmpput(\%info,
541: $r->dir_config('lonHostID'));
542: $env{'form.token'} = $token;
543: $r->internal_redirect('/adm/migrateuser');
544: $r->set_handlers('PerlHandler'=> undef);
545: }
546: return OK;
547: } else {
548: &Apache::lonnet::logthis(" SSO authorized unknown user $user ");
549: my @cancreate;
550: my %domconfig =
551: &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
552: if (ref($domconfig{'usercreation'}) eq 'HASH') {
553: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
554: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
555: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
556: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
557: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
558: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
559: }
560: }
561: }
562: if ((grep(/^sso$/,@cancreate)) || (defined($r->dir_config('lonSSOUserUnknownRedirect')))) {
563: $r->subprocess_env->set('SSOUserUnknown' => $user);
564: $r->subprocess_env->set('SSOUserDomain' => $domain);
565: if (grep(/^sso$/,@cancreate)) {
566: #FIXME - need to preserve origurl, role and symb, or linkprot or linkkey for use after account
567: # creation
568: $r->set_handlers('PerlHandler'=> [\&Apache::createaccount::handler]);
569: $r->handler('perl-script');
570: } else {
571: $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
572: $r->set_handlers('PerlHandler'=> undef);
573: }
574: return OK;
575: }
576: }
577: return undef;
578: }
579:
580: sub handler {
581: my $r = shift;
582: my $requrl=$r->uri;
583:
584: if ($requrl =~ m{^/res/adm/pages/[^/]+\.(gif|png)$}) {
585: return OK;
586: }
587:
588: if (&Apache::lonnet::is_domainimage($requrl)) {
589: return OK;
590: }
591:
592: my %user;
593: my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);
594:
595: unless (($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) {
596: my $result = &sso_login($r,$handle,$user{'name'});
597: if (defined($result)) {
598: return $result;
599: }
600: }
601:
602: my ($is_balancer,$otherserver);
603:
604: if ($handle eq '') {
605: unless ((($requrl eq '/adm/switchserver') && (!$r->is_initial_req())) ||
606: ($requrl =~ m{^/public/$match_domain/$match_courseid/syllabus}) ||
607: ($requrl =~ m{^/adm/help/}) || ($requrl eq '/adm/sso') ||
608: ($requrl =~ m{^/res/$match_domain/$match_username/})) {
609: $r->log_reason("Cookie not valid", $r->filename);
610: }
611: } elsif ($handle ne '') {
612:
613: # ------------------------------------------------------ Initialize Environment
614: my $lonidsdir=$r->dir_config('lonIDsDir');
615: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
616:
617: # --------------------------------------------------------- Initialize Language
618:
619: &Apache::lonlocal::get_language_handle($r);
620:
621: }
622:
623: # -------------------------------------------------- Should be a valid user now
624: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
625: # -------------------------------------------------------------- Resource State
626:
627: my ($cdom,$cnum);
628: if ($env{'request.course.id'}) {
629: $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
630: $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
631: }
632: if ($requrl=~/^\/+(res|uploaded)\//) {
633: $env{'request.state'} = "published";
634: } else {
635: $env{'request.state'} = 'unknown';
636: }
637: $env{'request.filename'} = $r->filename;
638: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
639: my ($suppext,$checkabsolute);
640: if ($requrl =~ m{^/adm/wrapper/ext/}) {
641: my $query = $r->args;
642: if ($query) {
643: my $preserved;
644: foreach my $pair (split(/&/,$query)) {
645: my ($name, $value) = split(/=/,$pair);
646: unless (($name eq 'symb') || ($name eq 'usehttp')) {
647: $preserved .= $pair.'&';
648: }
649: if (($env{'request.course.id'}) && ($name eq 'folderpath')) {
650: if ($value =~ /^supplemental/) {
651: $suppext = 1;
652: }
653: }
654: }
655: $preserved =~ s/\&$//;
656: if ($preserved) {
657: $env{'request.external.querystring'} = $preserved;
658: }
659: }
660: if ($env{'request.course.id'}) {
661: $checkabsolute = 1;
662: }
663: } elsif ($env{'request.course.id'} &&
664: (($requrl =~ m{^/adm/$match_domain/$match_username/aboutme$}) ||
665: ($requrl eq "/public/$cdom/$cnum/syllabus") ||
666: ($requrl =~ m{^/adm/$cdom/$cnum/\d+/ext\.tool$}))) {
667: my $query = $r->args;
668: if ($query) {
669: foreach my $pair (split(/&/,$query)) {
670: my ($name, $value) = split(/=/,$pair);
671: if ($name eq 'folderpath') {
672: if ($value =~ /^supplemental/) {
673: $suppext = 1;
674: }
675: last;
676: }
677: }
678: }
679: if ($requrl =~ m{^/public/$cdom/$cnum/syllabus$}) {
680: $checkabsolute = 1;
681: }
682: }
683: if ($checkabsolute) {
684: my $hostname = $r->hostname();
685: my $lonhost = &Apache::lonnet::host_from_dns($hostname);
686: if ($lonhost) {
687: my $actual = &Apache::lonnet::absolute_url($hostname,1,1);
688: my $exphostname = &Apache::lonnet::hostname($lonhost);
689: my $expected = $Apache::lonnet::protocol{$lonhost}.'://'.$hostname;
690: unless ($actual eq $expected) {
691: $env{'request.use_absolute'} = $expected;
692: }
693: }
694: }
695: # -------------------------------------------------------- Load POST parameters
696:
697: &Apache::lonacc::get_posted_cgi($r);
698:
699: # ------------------------------------------------------ Check if load balancer
700:
701: my $checkexempt;
702: if ($env{'user.loadbalexempt'} eq $r->dir_config('lonHostID')) {
703: if ($env{'user.loadbalcheck.time'} + 600 > time) {
704: $checkexempt = 1;
705: }
706: }
707: if ($env{'user.noloadbalance'} eq $r->dir_config('lonHostID')) {
708: $checkexempt = 1;
709: }
710: unless (($checkexempt) || (($requrl eq '/adm/switchserver') && (!$r->is_initial_req()))) {
711: ($is_balancer,$otherserver) =
712: &Apache::lonnet::check_loadbalancing($env{'user.name'},
713: $env{'user.domain'});
714: if ($is_balancer) {
715: # Check if browser sent a LON-CAPA load balancer cookie (and this is a balancer)
716: my ($found_server,$balancer_cookie) = &Apache::lonnet::check_for_balancer_cookie($r);
717: if (($found_server) && ($balancer_cookie =~ /^\Q$env{'user.domain'}\E_\Q$env{'user.name'}\E_/)) {
718: $otherserver = $found_server;
719: }
720: unless ($requrl eq '/adm/switchserver') {
721: $r->set_handlers('PerlResponseHandler'=>
722: [\&Apache::switchserver::handler]);
723: }
724: if ($otherserver ne '') {
725: $env{'form.otherserver'} = $otherserver;
726: }
727: unless (($env{'form.origurl'}) || ($r->uri eq '/adm/roles') ||
728: ($r->uri eq '/adm/switchserver') || ($r->uri eq '/adm/sso')) {
729: $env{'form.origurl'} = $r->uri;
730: }
731: }
732: }
733: if ($requrl=~m{^/+tiny/+$match_domain/+\w+$}) {
734: if ($env{'user.name'} eq 'public' &&
735: $env{'user.domain'} eq 'public') {
736: $env{'request.firsturl'}=$requrl;
737: return FORBIDDEN;
738: } else {
739: return OK;
740: }
741: }
742: # ---------------------------------------------------------------- Check access
743: my $now = time;
744: my ($check_symb,$check_access,$check_block,$access,$poss_symb);
745: if ($requrl !~ m{^/(?:adm|public|(?:prt|zip)spool)/}
746: || $requrl =~ /^\/adm\/.*\/(smppg|bulletinboard)(\?|$ )/x) {
747: $check_access = 1;
748: }
749: if ((!$check_access) && ($env{'request.course.id'})) {
750: if (($requrl eq '/adm/viewclasslist') ||
751: ($requrl =~ m{^(/adm/wrapper|)\Q/uploaded/$cdom/$cnum/docs/\E}) ||
752: ($requrl =~ m{^/adm/.*/aboutme$}) ||
753: ($requrl=~m{^/adm/coursedocs/showdoc/}) ||
754: ($requrl=~m{^(/adm/wrapper|)/adm/$cdom/$cnum/\d+/ext\.tool$})) {
755: $check_block = 1;
756: }
757: }
758: if (($env{'request.course.id'}) && (!$suppext)) {
759: $requrl=~/\.(\w+)$/;
760: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
761: ($requrl=~/^\/adm\/.*\/(aboutme|smppg|bulletinboard)(\?|$ )/x) ||
762: ($requrl=~/^\/adm\/wrapper\//) ||
763: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
764: ($requrl=~m|\.problem/smpedit$|) ||
765: ($requrl=~/^\/public\/.*\/syllabus$/) ||
766: ($requrl=~/^\/adm\/(viewclasslist|navmaps)$/) ||
767: ($requrl=~/^\/adm\/.*\/aboutme\/portfolio(\?|$)/) ||
768: ($requrl=~m{^/adm/$cdom/$cnum/\d+/ext\.tool$})) {
769: $check_symb = 1;
770: }
771: }
772: if (($check_access) || ($check_block)) {
773: if ($check_symb) {
774: if ($env{'form.symb'}) {
775: $poss_symb=&Apache::lonnet::symbclean($env{'form.symb'});
776: } elsif (($env{'request.course.id'}) && ($r->args ne '')) {
777: my $query = $r->args;
778: foreach my $pair (split(/&/,$query)) {
779: my ($name, $value) = split(/=/,$pair);
780: $name = &unescape($name);
781: $value =~ tr/+/ /;
782: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
783: if ($name eq 'symb') {
784: $poss_symb = &Apache::lonnet::symbclean($value);
785: last;
786: }
787: }
788: }
789: if ($poss_symb) {
790: my ($possmap,$resid,$url)=&Apache::lonnet::decode_symb($poss_symb);
791: $url = &Apache::lonnet::clutter($url);
792: my $toplevelmap = $env{'course.'.$env{'request.course.id'}.'.url'};
793: unless (($url eq $requrl) && (($possmap eq $toplevelmap) ||
794: (&Apache::lonnet::is_on_map($possmap)))) {
795: undef($poss_symb);
796: }
797: if ($poss_symb) {
798: if ((!$env{'request.role.adv'}) && ($env{'acc.randomout'}) &&
799: ($env{'acc.randomout'}=~/\&\Q$poss_symb\E\&/)) {
800: undef($poss_symb);
801: } elsif ((!$env{'request.role.adv'}) && ($env{'acc.deeplinkout'}) &&
802: ($env{'acc.deeplinkout'}=~/\&\Q$poss_symb\E\&/)) {
803: undef($poss_symb);
804: }
805: }
806: }
807: if ($poss_symb) {
808: $access=&Apache::lonnet::allowed('bre',$requrl,$poss_symb);
809: } else {
810: $access=&Apache::lonnet::allowed('bre',$requrl,'','','','',1);
811: }
812: } else {
813: my $nodeeplinkcheck;
814: if (($check_access) && ($requrl =~ /\.(sequence|page)$/)) {
815: unless ($env{'form.navmap'}) {
816: if ($r->args ne '') {
817: &Apache::loncommon::get_unprocessed_cgi($r->args,['navmap']);
818: unless ($env{'form.navmap'}) {
819: $nodeeplinkcheck = 1;
820: }
821: }
822: }
823: }
824: my $clientip = &Apache::lonnet::get_requestor_ip($r);
825: $access=&Apache::lonnet::allowed('bre',$requrl,'','',$clientip,'','',$nodeeplinkcheck);
826: }
827: }
828: if ($check_block) {
829: if ($access eq 'B') {
830: if ($poss_symb) {
831: if (&Apache::lonnet::symbverify($poss_symb,$requrl)) {
832: $env{'request.symb'} = $poss_symb;
833: }
834: }
835: &Apache::blockedaccess::setup_handler($r);
836: return OK;
837: }
838: } elsif ($check_access) {
839: if ($handle eq '') {
840: unless ($access eq 'F') {
841: if ($requrl =~ m{^/res/$match_domain/$match_username/}) {
842: $r->log_reason("Cookie not valid", $r->filename);
843: }
844: }
845: }
846: if ($access eq '1') {
847: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
848: return HTTP_NOT_ACCEPTABLE;
849: }
850: if ($access eq 'A') {
851: &Apache::restrictedaccess::setup_handler($r);
852: return OK;
853: }
854: if ($access eq 'B') {
855: if ($poss_symb) {
856: if (&Apache::lonnet::symbverify($poss_symb,$requrl)) {
857: $env{'request.symb'} = $poss_symb;
858: }
859: }
860: &Apache::blockedaccess::setup_handler($r);
861: return OK;
862: }
863: if ($access eq 'D') {
864: &Apache::lonprotected::setup_handler($r);
865: return OK;
866: }
867: if (($access ne '2') && ($access ne 'F')) {
868: if ($requrl =~ m{^/res/}) {
869: $access = &Apache::lonnet::allowed('bro',$requrl);
870: if ($access ne 'F') {
871: if ($requrl eq '/res/lib/templates/simpleproblem.problem/smpedit') {
872: $access = &Apache::lonnet::allowed('bre','/res/lib/templates/simpleproblem.problem');
873: if ($access ne 'F') {
874: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
875: return HTTP_NOT_ACCEPTABLE;
876: }
877: } else {
878: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
879: return HTTP_NOT_ACCEPTABLE;
880: }
881: }
882: } elsif (($handle =~ /^publicuser_\d+$/) && (&Apache::lonnet::is_portfolio_url($requrl))) {
883: my $clientip = &Apache::lonnet::get_requestor_ip($r);
884: if (&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip) ne 'F') {
885: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
886: return HTTP_NOT_ACCEPTABLE;
887: }
888: } else {
889: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
890: return HTTP_NOT_ACCEPTABLE;
891: }
892: }
893: }
894: if ($requrl =~ m|^/prtspool/|) {
895: my $start='/prtspool/'.$env{'user.name'}.'_'.
896: $env{'user.domain'};
897: if ($requrl !~ /^\Q$start\E/) {
898: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
899: return HTTP_NOT_ACCEPTABLE;
900: }
901: }
902: if ($requrl =~ m|^/zipspool/|) {
903: my $start='/zipspool/zipout/'.$env{'user.name'}.":".
904: $env{'user.domain'};
905: if ($requrl !~ /^\Q$start\E/) {
906: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
907: return HTTP_NOT_ACCEPTABLE;
908: }
909: }
910: if ($env{'user.name'} eq 'public' &&
911: $env{'user.domain'} eq 'public' &&
912: $requrl !~ m{^/+(res|public|uploaded)/} &&
913: $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
914: $requrl !~ m{^/adm/blockingstatus/.*$} &&
915: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
916: $env{'request.querystring'}=$r->args;
917: $env{'request.firsturl'}=$requrl;
918: return FORBIDDEN;
919: }
920: # ------------------------------------------------------------- This is allowed
921: if ($env{'request.course.id'}) {
922: &Apache::lonnet::countacc($requrl);
923: my $query=$r->args;
924: if ($check_symb) {
925: # ------------------------------------- This is serious stuff, get symb and log
926: my $symb;
927: if ($query) {
928: &Apache::loncommon::get_unprocessed_cgi($query,['symb','folderpath']);
929: }
930: if ($env{'form.symb'}) {
931: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
932: if (($requrl eq '/adm/navmaps') ||
933: ($requrl =~ m{^/adm/wrapper/}) ||
934: ($requrl =~ m{^/adm/coursedocs/showdoc/})) {
935: unless (&Apache::lonnet::symbverify($symb,$requrl)) {
936: if (&Apache::lonnet::is_on_map($requrl)) {
937: $symb = &Apache::lonnet::symbread($requrl);
938: unless (&Apache::lonnet::symbverify($symb,$requrl)) {
939: undef($symb);
940: }
941: }
942: }
943: if ($symb) {
944: if ($requrl eq '/adm/navmaps') {
945: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
946: &Apache::lonnet::symblist($map,$murl => [$murl,$mid]);
947: } elsif (($requrl =~ m{^/adm/wrapper/}) ||
948: ($requrl =~ m{^/adm/coursedocs/showdoc/})) {
949: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
950: if ($map =~ /\.page$/) {
951: my $mapsymb = &Apache::lonnet::symbread($map);
952: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
953: }
954: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
955: 'last_known' =>[$murl,$mid]);
956: }
957: }
958: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
959: (($requrl=~m|(.*)/smpedit$|) &&
960: &Apache::lonnet::symbverify($symb,$1)) ||
961: (($requrl=~m|(.*/aboutme)/portfolio$|) &&
962: &Apache::lonnet::symbverify($symb,$1))) {
963: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
964: if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) {
965: my $mapsymb = &Apache::lonnet::symbread($map);
966: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
967: }
968: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
969: 'last_known' =>[$murl,$mid]);
970: } else {
971: $r->log_reason('Invalid symb for '.$requrl.': '.
972: $symb);
973: $env{'user.error.msg'}=
974: "$requrl:bre:1:1:Invalid Access";
975: return HTTP_NOT_ACCEPTABLE;
976: }
977: } else {
978: if ($requrl=~m{^(/adm/.*/aboutme)/portfolio$}) {
979: $requrl = $1;
980: }
981: $symb=&Apache::lonnet::symbread($requrl);
982: if (&Apache::lonnet::is_on_map($requrl) && $symb) {
983: my ($encstate,$invalidsymb);
984: unless (&Apache::lonnet::symbverify($symb,$requrl,\$encstate)) {
985: $invalidsymb = 1;
986: #
987: # If $env{'request.enc'} inconsistent with encryption expected for $symb
988: # retrieved by lonnet::symbread(), call again to check for an instance of
989: # $requrl in the course for which expected encryption matches request.enc.
990: # If symb for different instance passes lonnet::symbverify(), use that as
991: # the symb for $requrl and call &Apache::lonnet::allowed() for that symb.
992: # Report invalid symb if there is no other symb. Redirect to /adm/ambiguous
993: # if multiple possible symbs consistent with request.enc available for $requrl.
994: #
995: if (($env{'request.enc'} && !$encstate) || (!$env{'request.enc'} && $encstate)) {
996: my %possibles;
997: my $nocache = 1;
998: my $oldsymb = $symb;
999: $symb = &Apache::lonnet::symbread($requrl,'','','',\%possibles,$nocache);
1000: if (($symb) && ($symb ne $oldsymb)) {
1001: if (&Apache::lonnet::symbverify($symb,$requrl)) {
1002: my $access=&Apache::lonnet::allowed('bre',$requrl,$symb);
1003: if ($access eq 'B') {
1004: $env{'request.symb'} = $symb;
1005: &Apache::blockedaccess::setup_handler($r);
1006: return OK;
1007: } elsif (($access eq '2') || ($access eq 'F')) {
1008: $invalidsymb = '';
1009: }
1010: }
1011: } elsif (keys(%possibles) > 1) {
1012: $r->internal_redirect('/adm/ambiguous');
1013: return OK;
1014: }
1015: }
1016: if ($invalidsymb) {
1017: if ($requrl eq '/adm/navmaps') {
1018: undef($symb);
1019: } else {
1020: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
1021: $env{'user.error.msg'}=
1022: "$requrl:bre:1:1:Invalid Access";
1023: return HTTP_NOT_ACCEPTABLE;
1024: }
1025: }
1026: }
1027: }
1028: if ($symb) {
1029: my ($map,$mid,$murl)=
1030: &Apache::lonnet::decode_symb($symb);
1031: if ($requrl eq '/adm/navmaps') {
1032: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid]);
1033: } else {
1034: if (($map =~ /\.page$/) && ($requrl !~ /\.page$/)) {
1035: my $mapsymb = &Apache::lonnet::symbread($map);
1036: ($map,$mid,$murl)=&Apache::lonnet::decode_symb($mapsymb);
1037: }
1038: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
1039: 'last_known' =>[$murl,$mid]);
1040: }
1041: }
1042: }
1043: $env{'request.symb'}=$symb;
1044: if (($env{'request.symbread.cached.'}) && ($env{'request.symbread.cached.'} ne $symb)) {
1045: $env{'request.symbread.cached.'} = $symb;
1046: }
1047: &Apache::lonnet::courseacclog($symb);
1048: } else {
1049: # ------------------------------------------------------- This is other content
1050: &Apache::lonnet::courseacclog($requrl);
1051: }
1052: if ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/(docs|supplemental)/.+\.html?$}) {
1053: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1054: if ($query) {
1055: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit']);
1056: if ($env{'form.forceedit'}) {
1057: $env{'request.state'} = 'edit';
1058: }
1059: }
1060: }
1061: } elsif ($requrl =~ m{^/+uploaded/\Q$cdom\E/\Q$cnum\E/portfolio/syllabus/.+\.html?$}) {
1062: if (&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
1063: if ($query) {
1064: &Apache::loncommon::get_unprocessed_cgi($query,['forceedit','editmode']);
1065: if (($env{'form.forceedit'}) || ($env{'form.editmode'})) {
1066: $env{'request.state'} = 'edit';
1067: }
1068: }
1069: }
1070: }
1071: }
1072: return OK;
1073: } else {
1074: my $defdom=$r->dir_config('lonDefDomain');
1075: ($is_balancer,$otherserver) =
1076: &Apache::lonnet::check_loadbalancing(undef,$defdom);
1077: if ($is_balancer) {
1078: $r->set_handlers('PerlResponseHandler'=>
1079: [\&Apache::switchserver::handler]);
1080: if ($otherserver ne '') {
1081: $env{'form.otherserver'} = $otherserver;
1082: }
1083: }
1084: }
1085: # -------------------------------------------- See if this is a public resource
1086: if ($requrl=~m|^/+adm/+help/+|) {
1087: return OK;
1088: }
1089: # ------------------------------------ See if this is a viewable portfolio file
1090: if (&Apache::lonnet::is_portfolio_url($requrl)) {
1091: my $clientip = &Apache::lonnet::get_requestor_ip($r);
1092: my $access=&Apache::lonnet::allowed('bre',$requrl,undef,undef,$clientip);
1093: if ($access eq 'A') {
1094: &Apache::restrictedaccess::setup_handler($r);
1095: return OK;
1096: }
1097: if (($access ne '2') && ($access ne 'F')) {
1098: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
1099: return HTTP_NOT_ACCEPTABLE;
1100: }
1101: }
1102:
1103: # -------------------------------------------------------------- Not authorized
1104: $requrl=~/\.(\w+)$/;
1105: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
1106: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
1107: # ($requrl=~m|^/prtspool/|)) {
1108: # -------------------------- Store where they wanted to go and get login screen
1109: $env{'request.querystring'}=$r->args;
1110: $env{'request.firsturl'}=$requrl;
1111: return FORBIDDEN;
1112: # } else {
1113: # --------------------------------------------------------------------- Goodbye
1114: # return HTTP_BAD_REQUEST;
1115: # }
1116: }
1117:
1118: 1;
1119: __END__
1120:
1121: =pod
1122:
1123: =back
1124:
1125: =cut
1126:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonacc.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / auth