MDL-14589 improved param name
[moodle.git] / pluginfile.php
CommitLineData
d92e7c4d 1<?php
2
3// This file is part of Moodle - http://moodle.org/
4//
5// Moodle is free software: you can redistribute it and/or modify
6// it under the terms of the GNU General Public License as published by
7// the Free Software Foundation, either version 3 of the License, or
8// (at your option) any later version.
9//
10// Moodle is distributed in the hope that it will be useful,
11// but WITHOUT ANY WARRANTY; without even the implied warranty of
12// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13// GNU General Public License for more details.
14//
15// You should have received a copy of the GNU General Public License
16// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
17
18/**
19 * This script delegates file serving to individual plugins
20 *
64f93798 21 * @package core
d92e7c4d 22 * @subpackage file
23 * @copyright 2008 Petr Skoda (http://skodak.org)
24 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
25 */
26
2e9b772f 27// disable moodle specific debug messages and any errors in output
64f93798
PS
28//define('NO_DEBUG_DISPLAY', true);
29//TODO: uncomment this once the file api stabilises a bit more
2e9b772f 30
d92e7c4d 31require_once('config.php');
32require_once('lib/filelib.php');
33
d92e7c4d 34$relativepath = get_file_argument();
35$forcedownload = optional_param('forcedownload', 0, PARAM_BOOL);
36
37// relative path must start with '/'
38if (!$relativepath) {
39 print_error('invalidargorconf');
29afd52b 40} else if ($relativepath[0] != '/') {
d92e7c4d 41 print_error('pathdoesnotstartslash');
42}
43
44// extract relative path components
45$args = explode('/', ltrim($relativepath, '/'));
46
64f93798 47if (count($args) < 3) { // always at least context, component and filearea
d92e7c4d 48 print_error('invalidarguments');
49}
50
51$contextid = (int)array_shift($args);
64f93798
PS
52$component = clean_param(array_shift($args), PARAM_SAFEDIR);
53$filearea = clean_param(array_shift($args), PARAM_SAFEDIR);
54
55list($context, $course, $cm) = get_context_info_array($contextid);
d92e7c4d 56
d92e7c4d 57$fs = get_file_storage();
58
50f95991 59// If the file is a Flash file and that the user flash player is outdated return a flash upgrader MDL-20841
60$mimetype = mimeinfo('type', $args[count($args)-1]);
61if (!empty($CFG->excludeoldflashclients) && $mimetype == 'application/x-shockwave-flash'&& !empty($SESSION->flashversion)) {
62 $userplayerversion = explode('.', $SESSION->flashversion);
63 $requiredplayerversion = explode('.', $CFG->excludeoldflashclients);
64f93798 64 if (($userplayerversion[0] < $requiredplayerversion[0]) ||
50f95991 65 ($userplayerversion[0] == $requiredplayerversion[0] && $userplayerversion[1] < $requiredplayerversion[1]) ||
66 ($userplayerversion[0] == $requiredplayerversion[0] && $userplayerversion[1] == $requiredplayerversion[1]
64f93798 67 && $userplayerversion[2] < $requiredplayerversion[2])) {
50f95991 68 $path = $CFG->dirroot."/lib/flashdetect/flashupgrade.swf"; // Alternate content asking user to upgrade Flash
69 $filename = "flashupgrade.swf";
64f93798
PS
70 send_file($path, $filename, O, 0, false, false, 'application/x-shockwave-flash'); // Do not cache
71 }
72}
d92e7c4d 73
64f93798
PS
74// ========================================================================================================================
75if ($component === 'blog') {
76 // Blog file serving
77 if ($context->contextlevel != CONTEXT_SYSTEM) {
78 send_file_not_found();
79 }
80 if ($filearea !== 'attachment' and $filearea !== 'post') {
81 send_file_not_found();
82 }
d92e7c4d 83
64f93798
PS
84 if (empty($CFG->bloglevel)) {
85 print_error('siteblogdisable', 'blog');
86 }
172dd12c 87
64f93798
PS
88 if ($CFG->bloglevel < BLOG_GLOBAL_LEVEL) {
89 require_login();
90 if (isguestuser()) {
91 print_error('noguest');
92 }
93 if ($CFG->bloglevel == BLOG_USER_LEVEL) {
d92e7c4d 94 if ($USER->id != $entry->userid) {
95 send_file_not_found();
96 }
97 }
64f93798
PS
98 }
99 $entryid = (int)array_shift($args);
100 if (!$entry = $DB->get_record('post', array('module'=>'blog', 'id'=>$entryid))) {
101 send_file_not_found();
102 }
172dd12c 103
64f93798
PS
104 if ('publishstate' === 'public') {
105 if ($CFG->forcelogin) {
106 require_login();
107 }
172dd12c 108
64f93798
PS
109 } else if ('publishstate' === 'site') {
110 require_login();
111 //ok
112 } else if ('publishstate' === 'draft') {
113 require_login();
114 if ($USER->id != $entry->userid) {
d92e7c4d 115 send_file_not_found();
116 }
64f93798
PS
117 }
118
119 $filename = array_pop($args);
d85ab705 120 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
64f93798
PS
121
122 if (!$file = $fs->get_file($context->id, $component, $filearea, $entryid, $filepath, $filename) or $file->is_directory()) {
123 send_file_not_found();
124 }
172dd12c 125
64f93798
PS
126 send_stored_file($file, 10*60, 0, true); // download MUST be forced - security!
127
128// ========================================================================================================================
129} else if ($component === 'grade') {
130 if (($filearea === 'outcome' or $filearea === 'scale') and $context->contextlevel == CONTEXT_SYSTEM) {
131 // Global gradebook files
8bdc9cac
SH
132 if ($CFG->forcelogin) {
133 require_login();
134 }
135
64f93798 136 $fullpath = "/$context->id/$component/$filearea/".implode('/', $args);
8bdc9cac
SH
137
138 if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
139 send_file_not_found();
140 }
141
142 session_get_instance()->write_close(); // unlock session during fileserving
64f93798 143 send_stored_file($file, 60*60, 0, $forcedownload);
8bdc9cac 144
64f93798
PS
145 } else if ($filearea === 'feedback' and $context->contextlevel == CONTEXT_COURSE) {
146 //TODO: nobody implemented this yet in grade edit form!!
147 send_file_not_found();
8bdc9cac 148
64f93798
PS
149 if ($CFG->forcelogin || $course->id !== SITEID) {
150 require_login($course);
8bdc9cac
SH
151 }
152
64f93798 153 $fullpath = "/$context->id/$component/$filearea/".implode('/', $args);
8bdc9cac
SH
154
155 if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
156 send_file_not_found();
157 }
158
159 session_get_instance()->write_close(); // unlock session during fileserving
64f93798
PS
160 send_stored_file($file, 60*60, 0, $forcedownload);
161 } else {
162 send_file_not_found();
163 }
8bdc9cac 164
64f93798
PS
165// ========================================================================================================================
166} else if ($component === 'tag') {
167 if ($filearea === 'description' and $context->contextlevel == CONTEXT_SYSTEM) {
76d9df3f 168
64f93798 169 // All tag descriptions are going to be public but we still need to respect forcelogin
76d9df3f
SH
170 if ($CFG->forcelogin) {
171 require_login();
172 }
173
64f93798 174 $fullpath = "/$context->id/tage/description/".implode('/', $args);
76d9df3f
SH
175
176 if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
177 send_file_not_found();
178 }
179
180 session_get_instance()->write_close(); // unlock session during fileserving
64f93798 181 send_stored_file($file, 60*60, 0, true);
172dd12c 182
d92e7c4d 183 } else {
184 send_file_not_found();
172dd12c 185 }
186
64f93798
PS
187// ========================================================================================================================
188} else if ($component === 'calendar') {
189 if ($filearea === 'event_description' and $context->contextlevel == CONTEXT_SYSTEM) {
76d9df3f 190
64f93798
PS
191 // All events here are public the one requirement is that we respect forcelogin
192 if ($CFG->forcelogin) {
193 require_login();
194 }
195
196 // Get the event if from the args array
197 $eventid = array_shift($args);
198
199 // Load the event from the database
200 if (!$event = $DB->get_record('event', array('id'=>(int)$eventid, 'eventtype'=>'site'))) {
201 send_file_not_found();
202 }
203 // Check that we got an event and that it's userid is that of the user
204
205 // Get the file and serve if successful
206 $filename = array_pop($args);
d85ab705 207 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
64f93798
PS
208 if (!$file = $fs->get_file($context->id, $component, $filearea, $eventid, $filepath, $filename) or $file->is_directory()) {
209 send_file_not_found();
210 }
211
212 session_get_instance()->write_close(); // unlock session during fileserving
213 send_stored_file($file, 60*60, 0, $forcedownload);
214
215 } else if ($filearea === 'event_description' and $context->contextlevel == CONTEXT_USER) {
76d9df3f
SH
216
217 // Must be logged in, if they are not then they obviously can't be this user
218 require_login();
03221650 219
76d9df3f
SH
220 // Don't want guests here, potentially saves a DB call
221 if (isguestuser()) {
222 send_file_not_found();
223 }
224
225 // Get the event if from the args array
226 $eventid = array_shift($args);
76d9df3f 227
64f93798
PS
228 // Load the event from the database - user id must match
229 if (!$event = $DB->get_record('event', array('id'=>(int)$eventid, 'userid'=>$USER->id, 'eventtype'=>'user'))) {
76d9df3f
SH
230 send_file_not_found();
231 }
232
64f93798
PS
233 // Get the file and serve if successful
234 $filename = array_pop($args);
d85ab705 235 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
64f93798 236 if (!$file = $fs->get_file($context->id, $component, $filearea, $eventid, $filepath, $filename) or $file->is_directory()) {
76d9df3f
SH
237 send_file_not_found();
238 }
239
240 session_get_instance()->write_close(); // unlock session during fileserving
64f93798 241 send_stored_file($file, 60*60, 0, $forcedownload);
8bdc9cac 242
64f93798
PS
243 } else if ($filearea === 'event_description' and $context->contextlevel == CONTEXT_COURSE) {
244
245 // Respect forcelogin and require login unless this is the site.... it probably
246 // should NEVER be the site
247 if ($CFG->forcelogin || $course->id !== SITEID) {
248 require_login($course);
8bdc9cac
SH
249 }
250
64f93798
PS
251 // Must be able to at least view the course
252 if (!is_enrolled($context) and !is_viewing($context)) {
253 //TODO: hmm, do we really want to block guests here?
8bdc9cac
SH
254 send_file_not_found();
255 }
256
64f93798
PS
257 // Get the event id
258 $eventid = array_shift($args);
8bdc9cac 259
64f93798
PS
260 // Load the event from the database we need to check whether it is
261 // a) valid course event
262 // b) a group event
263 // Group events use the course context (there is no group context)
264 if (!$event = $DB->get_record('event', array('id'=>(int)$eventid, 'courseid'=>$course->id))) {
265 send_file_not_found();
266 }
8bdc9cac 267
64f93798
PS
268 // If its a group event require either membership of view all groups capability
269 if ($event->eventtype === 'group') {
270 if (!has_capability('moodle/site:accessallgroups', $context) && !groups_is_member($event->groupid, $USER->id)) {
271 send_file_not_found();
8bdc9cac 272 }
64f93798
PS
273 } else if ($event->eventtype === 'course') {
274 //ok
275 } else {
276 // some other type
277 send_file_not_found();
8bdc9cac
SH
278 }
279
64f93798
PS
280 // If we get this far we can serve the file
281 $filename = array_pop($args);
d85ab705 282 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
64f93798 283 if (!$file = $fs->get_file($context->id, $component, $filearea, $eventid, $filepath, $filename) or $file->is_directory()) {
8bdc9cac
SH
284 send_file_not_found();
285 }
286
287 session_get_instance()->write_close(); // unlock session during fileserving
64f93798 288 send_stored_file($file, 60*60, 0, $forcedownload);
76d9df3f 289
64f93798
PS
290 } else {
291 send_file_not_found();
292 }
172dd12c 293
64f93798
PS
294// ========================================================================================================================
295} else if ($component === 'user') {
296 if ($filearea === 'private' and $context->contextlevel == CONTEXT_USER) {
297 require_login();
172dd12c 298
64f93798
PS
299 if (isguestuser()) {
300 send_file_not_found();
214a81b8 301 }
172dd12c 302
64f93798
PS
303 if ($USER->id !== $context->instanceid) {
304 send_file_not_found();
305 }
172dd12c 306
64f93798 307 $filename = array_pop($args);
d85ab705 308 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
64f93798 309 if (!$file = $fs->get_file($context->id, $component, $filearea, 0, $filepath, $filename) or $file->is_directory()) {
214a81b8
DC
310 send_file_not_found();
311 }
172dd12c 312
214a81b8 313 session_get_instance()->write_close(); // unlock session during fileserving
64f93798
PS
314 send_stored_file($file, 0, 0, true); // must force download - security!
315
316 } else if ($filearea === 'profile' and $context->contextlevel == CONTEXT_USER) {
317
214a81b8 318 if ($CFG->forcelogin) {
214a81b8
DC
319 require_login();
320 }
214a81b8 321
64f93798 322 $userid = $context->instanceid;
214a81b8 323
64f93798
PS
324 if ($USER->id == $userid) {
325 // always can access own
214a81b8 326
64f93798
PS
327 } else if (!empty($CFG->forceloginforprofiles)) {
328 require_login();
172dd12c 329
64f93798
PS
330 if (isguestuser()) {
331 send_file_not_found();
332 }
172dd12c 333
64f93798
PS
334 // we allow access to site profile of all course contacts (usually teachers)
335 if (!has_coursecontact_role($userid) && !has_capability('moodle/user:viewdetails', $context)) {
336 send_file_not_found();
337 }
172dd12c 338
64f93798
PS
339 $canview = false;
340 if (has_capability('moodle/user:viewdetails', $context)) {
341 $canview = true;
342 } else {
343 $courses = enrol_get_my_courses();
344 }
172dd12c 345
64f93798
PS
346 while (!$canview && count($courses) > 0) {
347 $course = array_shift($courses);
348 if (has_capability('moodle/user:viewdetails', get_context_instance(CONTEXT_COURSE, $course->id))) {
349 $canview = true;
350 }
351 }
352 }
172dd12c 353
64f93798 354 $filename = array_pop($args);
d85ab705 355 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
64f93798 356 if (!$file = $fs->get_file($context->id, $component, $filearea, 0, $filepath, $filename) or $file->is_directory()) {
9e5fa330 357 send_file_not_found();
172dd12c 358 }
359
d92e7c4d 360 session_get_instance()->write_close(); // unlock session during fileserving
64f93798
PS
361 send_stored_file($file, 0, 0, true); // must force download - security!
362
363 } else if ($filearea === 'profile' and $context->contextlevel == CONTEXT_COURSE) {
364 $userid = (int)array_shift($args);
365 $usercontext = get_context_instance(CONTEXT_USER, $userid);
d92e7c4d 366
8bdc9cac
SH
367 if ($CFG->forcelogin) {
368 require_login();
369 }
370
64f93798
PS
371 if (!empty($CFG->forceloginforprofiles)) {
372 require_login();
373 if (isguestuser()) {
374 print_error('noguest');
375 }
03221650 376
64f93798
PS
377 //TODO: review this logic of user profile access prevention
378 if (!has_coursecontact_role($userid) and !has_capability('moodle/user:viewdetails', $usercontext)) {
379 print_error('usernotavailable');
380 }
381 if (!has_capability('moodle/user:viewdetails', $context) && !has_capability('moodle/user:viewdetails', $usercontext)) {
382 print_error('cannotviewprofile');
383 }
384 if (!is_enrolled($context, $userid)) {
385 print_error('notenrolledprofile');
386 }
387 if (groups_get_course_groupmode($course) == SEPARATEGROUPS and !has_capability('moodle/site:accessallgroups', $context)) {
388 print_error('groupnotamember');
389 }
390 }
391
392 $filename = array_pop($args);
d85ab705 393 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
64f93798 394 if (!$file = $fs->get_file($context->id, 'user', 'profile', 0, $filepath, $filename) or $file->is_directory()) {
8bdc9cac
SH
395 send_file_not_found();
396 }
397
398 session_get_instance()->write_close(); // unlock session during fileserving
64f93798 399 send_stored_file($file, 0, 0, true); // must force download - security!
8bdc9cac 400
64f93798
PS
401 } else if ($filearea === 'backup' and $context->contextlevel == CONTEXT_USER) {
402 require_login();
8bdc9cac 403
64f93798
PS
404 if (isguestuser()) {
405 send_file_not_found();
406 }
407 if ($USER->id != $userid) {
408 send_file_not_found();
8bdc9cac
SH
409 }
410
64f93798 411 $filename = array_pop($args);
d85ab705 412 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
64f93798 413 if (!$file = $fs->get_file($context->id, 'user', 'backup', 0, $filepath, $filename) or $file->is_directory()) {
8bdc9cac
SH
414 send_file_not_found();
415 }
416
417 session_get_instance()->write_close(); // unlock session during fileserving
64f93798 418 send_stored_file($file, 0, 0, true); // must force download - security!
8bdc9cac 419
64f93798
PS
420 } else {
421 send_file_not_found();
422 }
76d9df3f 423
64f93798
PS
424// ========================================================================================================================
425} else if ($component === 'coursecat') {
426 if ($context->contextlevel != CONTEXT_COURSECAT) {
427 send_file_not_found();
428 }
76d9df3f 429
64f93798
PS
430 if ($filearea === 'description') {
431 if ($CFG->forcelogin) {
432 // no login necessary - unless login forced everywhere
433 require_login();
76d9df3f
SH
434 }
435
64f93798 436 $filename = array_pop($args);
d85ab705 437 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
64f93798 438 if (!$file = $fs->get_file($context->id, 'coursecat', 'description', 0, $filepath, $filename) or $file->is_directory()) {
76d9df3f
SH
439 send_file_not_found();
440 }
441
64f93798
PS
442 session_get_instance()->write_close(); // unlock session during fileserving
443 send_stored_file($file, 60*60, 0, $forcedownload);
444 } else {
445 send_file_not_found();
446 }
76d9df3f 447
64f93798
PS
448// ========================================================================================================================
449} else if ($component === 'course') {
450 if ($context->contextlevel != CONTEXT_COURSE) {
451 send_file_not_found();
452 }
76d9df3f 453
64f93798
PS
454 if ($filearea === 'summary') {
455 if ($CFG->forcelogin) {
456 require_login();
76d9df3f
SH
457 }
458
64f93798 459 $filename = array_pop($args);
d85ab705 460 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
64f93798 461 if (!$file = $fs->get_file($context->id, 'course', 'summary', 0, $filepath, $filename) or $file->is_directory()) {
76d9df3f
SH
462 send_file_not_found();
463 }
464
465 session_get_instance()->write_close(); // unlock session during fileserving
64f93798 466 send_stored_file($file, 60*60, 0, $forcedownload);
76d9df3f 467
64f93798 468 } else if ($filearea === 'section') {
d92e7c4d 469 if ($CFG->forcelogin) {
172dd12c 470 require_login($course);
d92e7c4d 471 } else if ($course->id !== SITEID) {
472 require_login($course);
473 }
106f3b67 474
d92e7c4d 475 $sectionid = (int)array_shift($args);
106f3b67 476
d92e7c4d 477 if ($course->numsections < $sectionid) {
478 if (!has_capability('moodle/course:update', $context)) {
479 // disable access to invisible sections if can not edit course
480 // this is going to break some ugly hacks, but is necessary
106f3b67 481 send_file_not_found();
482 }
d92e7c4d 483 }
106f3b67 484
64f93798 485 $filename = array_pop($args);
d85ab705 486 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
64f93798 487 if (!$file = $fs->get_file($context->id, 'course', 'section', $sectionid, $filepath, $filename) or $file->is_directory()) {
d92e7c4d 488 send_file_not_found();
489 }
172dd12c 490
d92e7c4d 491 session_get_instance()->write_close(); // unlock session during fileserving
64f93798 492 send_stored_file($file, 60*60, 0, $forcedownload);
172dd12c 493
64f93798
PS
494 } else {
495 send_file_not_found();
496 }
91b890ab 497
64f93798
PS
498} else if ($component === 'group') {
499 if ($context->contextlevel != CONTEXT_COURSE) {
500 send_file_not_found();
501 }
91b890ab 502
64f93798 503 require_login($course);
91b890ab 504
64f93798
PS
505 $groupid = (int)array_shift($args);
506
507 $group = $DB->get_record('groups', array('id'=>$groupid, 'courseid'=>$course->id), '*', MUST_EXIST);
508 if (!has_capability('moodle/site:accessallgroups', $context) && !groups_is_member($group->id, $USER->id)) {
509 send_file_not_found();
510 }
511
512 if ($filearea === 'description' or $filearea === 'icon') {
513
514 //TODO: implement group image storage in file pool
515
516 $filename = array_pop($args);
d85ab705 517 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
64f93798 518 if (!$file = $fs->get_file($context->id, 'group', 'description', $group->id, $filepath, $filename) or $file->is_directory()) {
91b890ab
DC
519 send_file_not_found();
520 }
521
64f93798
PS
522 session_get_instance()->write_close(); // unlock session during fileserving
523 send_stored_file($file, 60*60, 0, $forcedownload);
214a81b8 524
64f93798
PS
525 } else {
526 send_file_not_found();
527 }
214a81b8 528
64f93798
PS
529} else if ($component === 'grouping') {
530 if ($context->contextlevel != CONTEXT_COURSE) {
531 send_file_not_found();
532 }
3156b8ca 533
64f93798 534 require_login($course);
3156b8ca 535
64f93798 536 $groupingid = (int)array_shift($args);
106f3b67 537
64f93798
PS
538 // note: everybody has access to grouping desc images for now
539 if ($filearea === 'description') {
106f3b67 540
64f93798 541 $filename = array_pop($args);
d85ab705 542 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
64f93798 543 if (!$file = $fs->get_file($context->id, 'grouping', 'description', $groupingid->id, $filepath, $filename) or $file->is_directory()) {
106f3b67 544 send_file_not_found();
545 }
172dd12c 546
d92e7c4d 547 session_get_instance()->write_close(); // unlock session during fileserving
64f93798 548 send_stored_file($file, 60*60, 0, $forcedownload);
106f3b67 549
d92e7c4d 550 } else {
551 send_file_not_found();
552 }
553
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554// ========================================================================================================================
555} else if ($component === 'backup') {
556 if ($filearea === 'course' and $context->contextlevel == CONTEXT_COURSE) {
557 require_login($course);
558 require_capability('moodle/backup:downloadfile', $context);
d92e7c4d 559
64f93798 560 $filename = array_pop($args);
d85ab705 561 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
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562 if (!$file = $fs->get_file($context->id, 'backup', 'course', 0, $filepath, $filename) or $file->is_directory()) {
563 send_file_not_found();
564 }
d92e7c4d 565
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566 session_get_instance()->write_close(); // unlock session during fileserving
567 send_stored_file($file, 0, 0, $forcedownload);
568
569 } else if ($filearea === 'section' and $context->contextlevel == CONTEXT_COURSE) {
570 require_login($course);
571 require_capability('moodle/backup:downloadfile', $context);
572
573 $sectionid = (int)array_shift($args);
574
575 $filename = array_pop($args);
d85ab705 576 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
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577 if (!$file = $fs->get_file($context->id, 'backup', 'section', $sectionid, $filepath, $filename) or $file->is_directory()) {
578 send_file_not_found();
579 }
580
581 session_get_instance()->write_close();
582 send_stored_file($file, 60*60, 0, $forcedownload);
583
584 } else if ($filearea === 'activity' and $context->contextlevel == CONTEXT_MODULE) {
585 require_login($course, false, $cm);
586 require_capability('moodle/backup:downloadfile', $context);
587
588 $filename = array_pop($args);
d85ab705 589 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
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590 if (!$file = $fs->get_file($context->id, 'backup', 'activity', 0, $filepath, $filename) or $file->is_directory()) {
591 send_file_not_found();
592 }
593
594 session_get_instance()->write_close();
595 send_stored_file($file, 60*60, 0, $forcedownload);
596
597 } else {
d92e7c4d 598 send_file_not_found();
599 }
600
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601// ========================================================================================================================
602} else if (strpos($component, 'mod_') === 0) {
603 $modname = substr($component, 4);
604 if (!file_exists("$CFG->dirroot/mod/$modname/lib.php")) {
d92e7c4d 605 send_file_not_found();
606 }
64f93798 607 require_once("$CFG->dirroot/mod/$modname/lib.php");
172dd12c 608
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609 if ($context->contextlevel == CONTEXT_MODULE) {
610 if ($cm->modname !== $modname) {
611 // somebody tries to gain illegal access, cm type must match the component!
9e5fa330 612 send_file_not_found();
172dd12c 613 }
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614 }
615
616 if ($filearea === 'intro') {
617 if (!plugin_supports('mod', $modname, FEATURE_MOD_INTRO, true)) {
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618 send_file_not_found();
619 }
620 require_course_login($course, true, $cm);
621
d92e7c4d 622 // all users may access it
64f93798 623 $filename = array_pop($args);
d85ab705 624 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
64f93798 625 if (!$file = $fs->get_file($context->id, 'mod_'.$modname, 'intro', 0, $filepath, $filename) or $file->is_directory()) {
dc5c2bd9 626 send_file_not_found();
627 }
628
d92e7c4d 629 $lifetime = isset($CFG->filelifetime) ? $CFG->filelifetime : 86400;
dc5c2bd9 630
d92e7c4d 631 // finally send the file
632 send_stored_file($file, $lifetime, 0);
633 }
634
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635 $filefunction = $component.'_pluginfile';
636 $filefunctionold = $modname.'_pluginfile';
d92e7c4d 637 if (function_exists($filefunction)) {
520199ea 638 // if the function exists, it must send the file and terminate. Whatever it returns leads to "not found"
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639 $filefunction($course, $cm, $context, $filearea, $args, $forcedownload);
640 } else if (function_exists($filefunctionold)) {
641 // if the function exists, it must send the file and terminate. Whatever it returns leads to "not found"
642 $filefunctionold($course, $cm, $context, $filearea, $args, $forcedownload);
b287ea7a 643 }
520199ea 644
645 send_file_not_found();
172dd12c 646
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647// ========================================================================================================================
648} else if (strpos($component, 'block_') === 0) {
649 $blockname = substr($component, 6);
650 // note: no more class methods in blocks please, that is ....
651 if (!file_exists("$CFG->dirroot/blocks/$blockname/lib.php")) {
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652 send_file_not_found();
653 }
64f93798 654 require_once("$CFG->dirroot/blocks/$blockname/lib.php");
f1cbbbeb 655
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656 if ($context->contextlevel == CONTEXT_BLOCK) {
657 $birecord = $DB->get_record('block_instances', array('id'=>$context->instanceid), '*',MUST_EXIST);
658 if ($birecord->blockname !== $blockname) {
659 // somebody tries to gain illegal access, cm type must match the component!
660 send_file_not_found();
661 }
662 } else {
663 $birecord = null;
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SH
664 }
665
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666 $filefunction = $component.'_pluginfile';
667 if (function_exists($filefunction)) {
668 // if the function exists, it must send the file and terminate. Whatever it returns leads to "not found"
669 $filefunction($course, $birecord, $context, $filearea, $args, $forcedownload);
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670 }
671
672 send_file_not_found();
172dd12c 673
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674} else if (strpos($component, '_') === false) {
675 // all core subsystems have to be specified above, no more guessing here!
676 send_file_not_found();
677
d92e7c4d 678} else {
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679 // try to serve general plugin file in arbitrary context
680 $dir = get_component_directory($component);
681 if (!file_exists("$dir/lib.php")) {
682 send_file_not_found();
683 }
77dd3034 684 include_once("$dir/lib.php");
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685
686 $filefunction = $component.'_pluginfile';
687 if (function_exists($filefunction)) {
688 // if the function exists, it must send the file and terminate. Whatever it returns leads to "not found"
689 $filefunction($course, $cm, $context, $filearea, $args, $forcedownload);
690 }
691
d92e7c4d 692 send_file_not_found();
693}