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[LON-CAPA] /
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lonacc.pm
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1.118:
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Sun Nov 16 02:46:19 2008 UTC (15 years, 10 months ago) by
raeburn
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Bug 5719 Size limits for File Upload in Essay response.
- Max. cumulative size for submitted files applies to total for all files submitted to a particular essayresponse item. Default is 100 MB.
- In course context, &lonacc:get_posted_cgi() will now no longer add file contents to %env if size exceeds max. for item.
- Additional checks in essayresponse::file_submission() will assign award as "EXCESS_FILESIZE" if total of all files being submitted for sinle essayresponse item exceed max set via
PARM.
- Modification to $Apache::lonhomework::results{"resource.$part.$id.$which"} to now include a comma separated list of only those submitted files which passed both the filetype and size tests.
1: # The LearningOnline Network
2: # Cookie Based Access Handler
3: #
4: # $Id: lonacc.pm,v 1.118 2008/11/16 02:46:19 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: package Apache::lonacc;
31:
32: use strict;
33: use Apache::Constants qw(:common :http :methods);
34: use Apache::File;
35: use Apache::lonnet;
36: use Apache::loncommon();
37: use Apache::lonlocal;
38: use Apache::restrictedaccess();
39: use Apache::blockedaccess();
40: use Fcntl qw(:flock);
41: use LONCAPA;
42:
43: sub cleanup {
44: my ($r)=@_;
45: if (! $r->is_initial_req()) { return DECLINED; }
46: &Apache::lonnet::save_cache();
47: &Apache::lontexconvert::jsMath_reset();
48: return OK;
49: }
50:
51: sub goodbye {
52: my ($r)=@_;
53: &Apache::lonnet::goodbye();
54: return DONE;
55: }
56:
57: ###############################################
58:
59: sub get_posted_cgi {
60: my ($r,$fields) = @_;
61:
62: my $buffer;
63: if ($r->header_in('Content-length')) {
64: $r->read($buffer,$r->header_in('Content-length'),0);
65: }
66: my $content_type = $r->header_in('Content-type');
67: if ($content_type !~ m{^multipart/form-data}) {
68: my @pairs=split(/&/,$buffer);
69: my $pair;
70: foreach $pair (@pairs) {
71: my ($name,$value) = split(/=/,$pair);
72: $value =~ tr/+/ /;
73: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
74: $name =~ tr/+/ /;
75: $name =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
76: if (ref($fields) eq 'ARRAY') {
77: next if (!grep(/^\Q$name\E$/,@{$fields}));
78: }
79: &Apache::loncommon::add_to_env("form.$name",$value);
80: }
81: } else {
82: my ($contentsep) = ($content_type =~ /boundary=\"?([^\";,]+)\"?/);
83: my @lines = split (/\n/,$buffer);
84: my $name='';
85: my $value='';
86: my $fname='';
87: my $fmime='';
88: my $i;
89: for ($i=0;$i<=$#lines;$i++) {
90: if ($lines[$i]=~/^--\Q$contentsep\E/) {
91: if ($name) {
92: chomp($value);
93: if (ref($fields) eq 'ARRAY') {
94: next if (!grep(/^\Q$name\E$/,@{$fields}));
95: }
96: if ($fname) {
97: if ($env{'form.symb'} ne '') {
98: my $size = (length($value))/(1024.0 * 1024.0);
99: if (&upload_size_allowed($name,$size,$fname) eq 'ok') {
100: $env{"form.$name.filename"}=$fname;
101: $env{"form.$name.mimetype"}=$fmime;
102: &Apache::loncommon::add_to_env("form.$name",$value);
103: }
104: } else {
105: $env{"form.$name.filename"}=$fname;
106: $env{"form.$name.mimetype"}=$fmime;
107: &Apache::loncommon::add_to_env("form.$name",$value);
108: }
109: } else {
110: $value=~s/\s+$//s;
111: &Apache::loncommon::add_to_env("form.$name",$value);
112: }
113: }
114: if ($i<$#lines) {
115: $i++;
116: $lines[$i]=~
117: /Content\-Disposition\:\s*form\-data\;\s*name\=\"([^\"]+)\"/i;
118: $name=$1;
119: $value='';
120: if ($lines[$i]=~/filename\=\"([^\"]+)\"/i) {
121: $fname=$1;
122: if
123: ($lines[$i+1]=~/Content\-Type\:\s*([\w\-\/]+)/i) {
124: $fmime=$1;
125: $i++;
126: } else {
127: $fmime='';
128: }
129: } else {
130: $fname='';
131: $fmime='';
132: }
133: $i++;
134: }
135: } else {
136: $value.=$lines[$i]."\n";
137: }
138: }
139: }
140: #
141: # Digested POSTed values
142: #
143: # Remember the way this was originally done (GET or POST)
144: #
145: $env{'request.method'}=$ENV{'REQUEST_METHOD'};
146: #
147: # There may also be stuff in the query string
148: # Tell subsequent handlers that this was GET, not POST, so they can access query string.
149: # Also, unset POSTed content length to cover all tracks.
150: #
151:
152: $r->method_number(M_GET);
153:
154: $r->method('GET');
155: $r->headers_in->unset('Content-length');
156: }
157:
158: #
159: # Perform size checks for file uploads to essayresponse items in course context.
160: #
161: # Add form.HWFILESIZE.$part_$id to %env with file size (MB)
162: # If file exceeds maximum allowed size, add form.HWFILETOOBIG.$part_$id to %env.
163: #
164:
165: sub upload_size_allowed {
166: my ($name,$size,$fname) = @_;
167: if ($name =~ /^HWFILE(\w+)$/) {
168: my $ident = $1;
169: my $item = 'HWFILESIZE'.$ident;
170: &Apache::loncommon::add_to_env("form.$item",$size);
171: my $maxsize= &Apache::lonnet::EXT("resource.$ident.maxfilesize");
172: if (!$maxsize) {
173: $maxsize = 100.0;
174: }
175: if ($size > $maxsize) {
176: my $warn = 'HWFILETOOBIG'.$ident;
177: &Apache::loncommon::add_to_env("form.$warn",$fname);
178: return;
179: }
180: }
181: return 'ok';
182: }
183:
184: # handle the case of the single sign on user, at this point $r->user
185: # will be set and valid now need to find the loncapa user info and possibly
186: # balance them
187: # returns OK if it was a SSO and user was handled
188: # undef if not SSO or no means to hanle the user
189:
190: sub sso_login {
191: my ($r,$handle) = @_;
192:
193: my $lonidsdir=$r->dir_config('lonIDsDir');
194: if (!($r->user
195: && (!defined($env{'user.name'}) && !defined($env{'user.domain'}))
196: && ($handle eq ''))) {
197: # not an SSO case or already logged in
198: return undef;
199: }
200:
201: my ($user) = ($r->user =~ m/([a-zA-Z0-9_\-@.]*)/);
202:
203: my $domain = $r->dir_config('lonDefDomain');
204: my $home=&Apache::lonnet::homeserver($user,$domain);
205: if ($home !~ /(con_lost|no_host|no_such_host)/) {
206: &Apache::lonnet::logthis(" SSO authorized user $user ");
207: if ($r->dir_config("lonBalancer") eq 'yes') {
208: # login but immeaditly go to switch server to find us a new
209: # machine
210: &Apache::lonauth::success($r,$user,$domain,$home,'noredirect');
211: $env{'request.sso.login'} = 1;
212: if (defined($r->dir_config("lonSSOReloginServer"))) {
213: $env{'request.sso.reloginserver'} =
214: $r->dir_config('lonSSOReloginServer');
215: }
216: $r->internal_redirect('/adm/switchserver');
217: $r->set_handlers('PerlHandler'=> undef);
218: } else {
219: # need to login them in, so generate the need data that
220: # migrate expects to do login
221: my %info=('ip' => $r->connection->remote_ip(),
222: 'domain' => $domain,
223: 'username' => $user,
224: 'server' => $r->dir_config('lonHostID'),
225: 'sso.login' => 1
226: );
227: if ($r->dir_config("ssodirecturl") == 1) {
228: $info{'origurl'} = $r->uri;
229: }
230: if (defined($r->dir_config("lonSSOReloginServer"))) {
231: $info{'sso.reloginserver'} =
232: $r->dir_config('lonSSOReloginServer');
233: }
234: my $token =
235: &Apache::lonnet::tmpput(\%info,
236: $r->dir_config('lonHostID'));
237: $env{'form.token'} = $token;
238: $r->internal_redirect('/adm/migrateuser');
239: $r->set_handlers('PerlHandler'=> undef);
240: }
241: return OK;
242: } elsif (defined($r->dir_config('lonSSOUserUnknownRedirect'))) {
243: &Apache::lonnet::logthis(" SSO authorized unknown user $user ");
244: $r->subprocess_env->set('SSOUserUnknown' => $user);
245: $r->subprocess_env->set('SSOUserDomain' => $domain);
246: my @cancreate;
247: my %domconfig =
248: &Apache::lonnet::get_dom('configuration',['usercreation'],$domain);
249: if (ref($domconfig{'usercreation'}) eq 'HASH') {
250: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') {
251: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') {
252: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}};
253: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') &&
254: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) {
255: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'});
256: }
257: }
258: }
259: if (grep(/^sso$/,@cancreate)) {
260: $r->internal_redirect('/adm/createaccount');
261: } else {
262: $r->internal_redirect($r->dir_config('lonSSOUserUnknownRedirect'));
263: }
264: $r->set_handlers('PerlHandler'=> undef);
265: return OK;
266: }
267: return undef;
268: }
269:
270: sub handler {
271: my $r = shift;
272: my $requrl=$r->uri;
273: if (&Apache::lonnet::is_domainimage($requrl)) {
274: return OK;
275: }
276:
277:
278: my $handle = &Apache::lonnet::check_for_valid_session($r);
279:
280: my $result = &sso_login($r,$handle);
281: if (defined($result)) {
282: return $result;
283: }
284:
285:
286: if ($r->dir_config("lonBalancer") eq 'yes') {
287: $r->set_handlers('PerlResponseHandler'=>
288: [\&Apache::switchserver::handler]);
289: }
290:
291: if ($handle eq '') {
292: $r->log_reason("Cookie $handle not valid", $r->filename);
293: } elsif ($handle ne '') {
294:
295: # ------------------------------------------------------ Initialize Environment
296: my $lonidsdir=$r->dir_config('lonIDsDir');
297: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
298:
299: # --------------------------------------------------------- Initialize Language
300:
301: &Apache::lonlocal::get_language_handle($r);
302:
303: }
304:
305: # -------------------------------------------------- Should be a valid user now
306: if ($env{'user.name'} ne '' && $env{'user.domain'} ne '') {
307: # -------------------------------------------------------------- Resource State
308:
309: if ($requrl=~/^\/+(res|uploaded)\//) {
310: $env{'request.state'} = "published";
311: } else {
312: $env{'request.state'} = 'unknown';
313: }
314: $env{'request.filename'} = $r->filename;
315: $env{'request.noversionuri'} = &Apache::lonnet::deversion($requrl);
316: # -------------------------------------------------------- Load POST parameters
317:
318: &Apache::lonacc::get_posted_cgi($r);
319:
320: # ---------------------------------------------------------------- Check access
321: my $now = time;
322: if ($requrl !~ m{^/(?:adm|public|prtspool)/}
323: || $requrl =~ /^\/adm\/.*\/(smppg|bulletinboard)(\?|$ )/x) {
324: my $access=&Apache::lonnet::allowed('bre',$requrl);
325: if ($access eq '1') {
326: $env{'user.error.msg'}="$requrl:bre:0:0:Choose Course";
327: return HTTP_NOT_ACCEPTABLE;
328: }
329: if ($access eq 'A') {
330: &Apache::restrictedaccess::setup_handler($r);
331: return OK;
332: }
333: if ($access eq 'B') {
334: &Apache::blockedaccess::setup_handler($r);
335: return OK;
336: }
337: if (($access ne '2') && ($access ne 'F')) {
338: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
339: return HTTP_NOT_ACCEPTABLE;
340: }
341: }
342: if ($requrl =~ m|^/prtspool/|) {
343: my $start='/prtspool/'.$env{'user.name'}.'_'.
344: $env{'user.domain'};
345: if ($requrl !~ /^\Q$start\E/) {
346: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
347: return HTTP_NOT_ACCEPTABLE;
348: }
349: }
350: if ($requrl =~ m|^/zipspool/|) {
351: my $start='/zipspool/zipout/'.$env{'user.name'}.":".
352: $env{'user.domain'};
353: if ($requrl !~ /^\Q$start\E/) {
354: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
355: return HTTP_NOT_ACCEPTABLE;
356: }
357: }
358: if ($env{'user.name'} eq 'public' &&
359: $env{'user.domain'} eq 'public' &&
360: $requrl !~ m{^/+(res|public|uploaded)/} &&
361: $requrl !~ m{^/adm/[^/]+/[^/]+/aboutme/portfolio$ }x &&
362: $requrl !~ m{^/+adm/(help|logout|restrictedaccess|randomlabel\.png)}) {
363: $env{'request.querystring'}=$r->args;
364: $env{'request.firsturl'}=$requrl;
365: return FORBIDDEN;
366: }
367: # ------------------------------------------------------------- This is allowed
368: if ($env{'request.course.id'}) {
369: &Apache::lonnet::countacc($requrl);
370: $requrl=~/\.(\w+)$/;
371: if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
372: ($requrl=~/^\/adm\/.*\/(aboutme|navmaps|smppg|bulletinboard)(\?|$ )/x) ||
373: ($requrl=~/^\/adm\/wrapper\//) ||
374: ($requrl=~m|^/adm/coursedocs/showdoc/|) ||
375: ($requrl=~m|\.problem/smpedit$|) ||
376: ($requrl=~/^\/public\/.*\/syllabus$/)) {
377: # ------------------------------------- This is serious stuff, get symb and log
378: my $query=$r->args;
379: my $symb;
380: if ($query) {
381: &Apache::loncommon::get_unprocessed_cgi($query,['symb']);
382: }
383: if ($env{'form.symb'}) {
384: $symb=&Apache::lonnet::symbclean($env{'form.symb'});
385: if ($requrl =~ m|^/adm/wrapper/|
386: || $requrl =~ m|^/adm/coursedocs/showdoc/|) {
387: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
388: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
389: 'last_known' =>[$murl,$mid]);
390: } elsif ((&Apache::lonnet::symbverify($symb,$requrl)) ||
391: (($requrl=~m|(.*)/smpedit$|) &&
392: &Apache::lonnet::symbverify($symb,$1))) {
393: my ($map,$mid,$murl)=&Apache::lonnet::decode_symb($symb);
394: &Apache::lonnet::symblist($map,$murl => [$murl,$mid],
395: 'last_known' =>[$murl,$mid]);
396: } else {
397: $r->log_reason('Invalid symb for '.$requrl.': '.
398: $symb);
399: $env{'user.error.msg'}=
400: "$requrl:bre:1:1:Invalid Access";
401: return HTTP_NOT_ACCEPTABLE;
402: }
403: } else {
404: $symb=&Apache::lonnet::symbread($requrl);
405: if (&Apache::lonnet::is_on_map($requrl) && $symb &&
406: !&Apache::lonnet::symbverify($symb,$requrl)) {
407: $r->log_reason('Invalid symb for '.$requrl.': '.$symb);
408: $env{'user.error.msg'}=
409: "$requrl:bre:1:1:Invalid Access";
410: return HTTP_NOT_ACCEPTABLE;
411: }
412: if ($symb) {
413: my ($map,$mid,$murl)=
414: &Apache::lonnet::decode_symb($symb);
415: &Apache::lonnet::symblist($map,$murl =>[$murl,$mid],
416: 'last_known' =>[$murl,$mid]);
417: }
418: }
419: $env{'request.symb'}=$symb;
420: &Apache::lonnet::courseacclog($symb);
421: } else {
422: # ------------------------------------------------------- This is other content
423: &Apache::lonnet::courseacclog($requrl);
424: }
425: }
426: return OK;
427: }
428: # -------------------------------------------- See if this is a public resource
429: if ($requrl=~m|^/+adm/+help/+|) {
430: return OK;
431: }
432: # ------------------------------------ See if this is a viewable portfolio file
433: if (&Apache::lonnet::is_portfolio_url($requrl)) {
434: my $access=&Apache::lonnet::allowed('bre',$requrl);
435: if ($access eq 'A') {
436: &Apache::restrictedaccess::setup_handler($r);
437: return OK;
438: }
439: if (($access ne '2') && ($access ne 'F')) {
440: $env{'user.error.msg'}="$requrl:bre:1:1:Access Denied";
441: return HTTP_NOT_ACCEPTABLE;
442: }
443: }
444:
445: # -------------------------------------------------------------- Not authorized
446: $requrl=~/\.(\w+)$/;
447: # if ((&Apache::loncommon::fileembstyle($1) eq 'ssi') ||
448: # ($requrl=~/^\/adm\/(roles|logout|email|menu|remote)/) ||
449: # ($requrl=~m|^/prtspool/|)) {
450: # -------------------------- Store where they wanted to go and get login screen
451: $env{'request.querystring'}=$r->args;
452: $env{'request.firsturl'}=$requrl;
453: return FORBIDDEN;
454: # } else {
455: # --------------------------------------------------------------------- Goodbye
456: # return HTTP_BAD_REQUEST;
457: # }
458: }
459:
460: 1;
461: __END__
462:
463: =head1 NAME
464:
465: Apache::lonacc - Cookie Based Access Handler
466:
467: =head1 SYNOPSIS
468:
469: Invoked (for various locations) by /etc/httpd/conf/srm.conf:
470:
471: PerlAccessHandler Apache::lonacc
472:
473: =head1 INTRODUCTION
474:
475: This module enables cookie based authentication and is used
476: to control access for many different LON-CAPA URIs.
477:
478: Whenever the client sends the cookie back to the server,
479: this cookie is handled by either lonacc.pm or loncacc.pm
480: (see srm.conf for what is invoked when). If
481: the cookie is missing or invalid, the user is re-challenged
482: for login information.
483:
484: This is part of the LearningOnline Network with CAPA project
485: described at http://www.lon-capa.org.
486:
487: =head1 HANDLER SUBROUTINE
488:
489: This routine is called by Apache and mod_perl.
490:
491: =over 4
492:
493: =item *
494:
495: transfer profile into environment
496:
497: =item *
498:
499: load POST parameters
500:
501: =item *
502:
503: check access
504:
505: =item *
506:
507: if allowed, get symb, log, generate course statistics if applicable
508:
509: =item *
510:
511: otherwise return error
512:
513: =item *
514:
515: see if public resource
516:
517: =item *
518:
519: store attempted access
520:
521: =back
522:
523: =cut
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